Commit 78062c50d15d6a0adfa09f6e35a6c52abcc9a32d

Authored by Gwendal Grignou
Committed by Tejun Heo
1 parent 1e8f5f761c

libata: cleanup SAT error translation

- Remove duplicate Medium Error Entry.

- Fix translations to match SAT2 translation table.

- Remove warning messages when translation is not found when decoding
  error or status register.

- Goes through status register decoding when only ABRT bit is set in
  error register.

Tested: When a disk fails, it sets

  Status = 0x71 [DRDY DF ERR] , Error = 0x4 [ABRT]

This patch will make the sense key HARDWARE_ERROR instead.

When there is a simple command syntax error:

  Status = 0x51 [DRDY ERR] , Error = 0x4 [ABRT]

The sense key remains ABORTED_COMMAND.

tj: Some updates to the description and comments.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Showing 1 changed file with 17 additions and 20 deletions Inline Diff

drivers/ata/libata-scsi.c
1 /* 1 /*
2 * libata-scsi.c - helper library for ATA 2 * libata-scsi.c - helper library for ATA
3 * 3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com> 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org 5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails. 6 * on emails.
7 * 7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik 9 * Copyright 2003-2004 Jeff Garzik
10 * 10 *
11 * 11 *
12 * This program is free software; you can redistribute it and/or modify 12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by 13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option) 14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version. 15 * any later version.
16 * 16 *
17 * This program is distributed in the hope that it will be useful, 17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details. 20 * GNU General Public License for more details.
21 * 21 *
22 * You should have received a copy of the GNU General Public License 22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to 23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 * 25 *
26 * 26 *
27 * libata documentation is available via 'make {ps|pdf}docs', 27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.* 28 * as Documentation/DocBook/libata.*
29 * 29 *
30 * Hardware documentation available from 30 * Hardware documentation available from
31 * - http://www.t10.org/ 31 * - http://www.t10.org/
32 * - http://www.t13.org/ 32 * - http://www.t13.org/
33 * 33 *
34 */ 34 */
35 35
36 #include <linux/slab.h> 36 #include <linux/slab.h>
37 #include <linux/kernel.h> 37 #include <linux/kernel.h>
38 #include <linux/blkdev.h> 38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h> 39 #include <linux/spinlock.h>
40 #include <linux/export.h> 40 #include <linux/export.h>
41 #include <scsi/scsi.h> 41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h> 43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h> 44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h> 45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h> 46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h> 47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h> 48 #include <linux/libata.h>
49 #include <linux/hdreg.h> 49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h> 50 #include <linux/uaccess.h>
51 #include <linux/suspend.h> 51 #include <linux/suspend.h>
52 #include <linux/pm_qos.h> 52 #include <linux/pm_qos.h>
53 #include <asm/unaligned.h> 53 #include <asm/unaligned.h>
54 54
55 #include "libata.h" 55 #include "libata.h"
56 #include "libata-transport.h" 56 #include "libata-transport.h"
57 57
58 #define ATA_SCSI_RBUF_SIZE 4096 58 #define ATA_SCSI_RBUF_SIZE 4096
59 59
60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
61 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 61 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 62
63 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 63 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 64
65 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 65 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
66 const struct scsi_device *scsidev); 66 const struct scsi_device *scsidev);
67 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 67 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
68 const struct scsi_device *scsidev); 68 const struct scsi_device *scsidev);
69 69
70 #define RW_RECOVERY_MPAGE 0x1 70 #define RW_RECOVERY_MPAGE 0x1
71 #define RW_RECOVERY_MPAGE_LEN 12 71 #define RW_RECOVERY_MPAGE_LEN 12
72 #define CACHE_MPAGE 0x8 72 #define CACHE_MPAGE 0x8
73 #define CACHE_MPAGE_LEN 20 73 #define CACHE_MPAGE_LEN 20
74 #define CONTROL_MPAGE 0xa 74 #define CONTROL_MPAGE 0xa
75 #define CONTROL_MPAGE_LEN 12 75 #define CONTROL_MPAGE_LEN 12
76 #define ALL_MPAGES 0x3f 76 #define ALL_MPAGES 0x3f
77 #define ALL_SUB_MPAGES 0xff 77 #define ALL_SUB_MPAGES 0xff
78 78
79 79
80 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 80 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE, 81 RW_RECOVERY_MPAGE,
82 RW_RECOVERY_MPAGE_LEN - 2, 82 RW_RECOVERY_MPAGE_LEN - 2,
83 (1 << 7), /* AWRE */ 83 (1 << 7), /* AWRE */
84 0, /* read retry count */ 84 0, /* read retry count */
85 0, 0, 0, 0, 85 0, 0, 0, 0,
86 0, /* write retry count */ 86 0, /* write retry count */
87 0, 0, 0 87 0, 0, 0
88 }; 88 };
89 89
90 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 90 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 CACHE_MPAGE, 91 CACHE_MPAGE,
92 CACHE_MPAGE_LEN - 2, 92 CACHE_MPAGE_LEN - 2,
93 0, /* contains WCE, needs to be 0 for logic */ 93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0, 94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */ 95 0, /* contains DRA, needs to be 0 for logic */
96 0, 0, 0, 0, 0, 0, 0 96 0, 0, 0, 0, 0, 0, 0
97 }; 97 };
98 98
99 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 99 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE, 100 CONTROL_MPAGE,
101 CONTROL_MPAGE_LEN - 2, 101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */ 102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */ 103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff, 104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */ 105 0, 30 /* extended self test time, see 05-359r1 */
106 }; 106 };
107 107
108 static const char *ata_lpm_policy_names[] = { 108 static const char *ata_lpm_policy_names[] = {
109 [ATA_LPM_UNKNOWN] = "max_performance", 109 [ATA_LPM_UNKNOWN] = "max_performance",
110 [ATA_LPM_MAX_POWER] = "max_performance", 110 [ATA_LPM_MAX_POWER] = "max_performance",
111 [ATA_LPM_MED_POWER] = "medium_power", 111 [ATA_LPM_MED_POWER] = "medium_power",
112 [ATA_LPM_MIN_POWER] = "min_power", 112 [ATA_LPM_MIN_POWER] = "min_power",
113 }; 113 };
114 114
115 static ssize_t ata_scsi_lpm_store(struct device *dev, 115 static ssize_t ata_scsi_lpm_store(struct device *dev,
116 struct device_attribute *attr, 116 struct device_attribute *attr,
117 const char *buf, size_t count) 117 const char *buf, size_t count)
118 { 118 {
119 struct Scsi_Host *shost = class_to_shost(dev); 119 struct Scsi_Host *shost = class_to_shost(dev);
120 struct ata_port *ap = ata_shost_to_port(shost); 120 struct ata_port *ap = ata_shost_to_port(shost);
121 enum ata_lpm_policy policy; 121 enum ata_lpm_policy policy;
122 unsigned long flags; 122 unsigned long flags;
123 123
124 /* UNKNOWN is internal state, iterate from MAX_POWER */ 124 /* UNKNOWN is internal state, iterate from MAX_POWER */
125 for (policy = ATA_LPM_MAX_POWER; 125 for (policy = ATA_LPM_MAX_POWER;
126 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 126 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
127 const char *name = ata_lpm_policy_names[policy]; 127 const char *name = ata_lpm_policy_names[policy];
128 128
129 if (strncmp(name, buf, strlen(name)) == 0) 129 if (strncmp(name, buf, strlen(name)) == 0)
130 break; 130 break;
131 } 131 }
132 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 132 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
133 return -EINVAL; 133 return -EINVAL;
134 134
135 spin_lock_irqsave(ap->lock, flags); 135 spin_lock_irqsave(ap->lock, flags);
136 ap->target_lpm_policy = policy; 136 ap->target_lpm_policy = policy;
137 ata_port_schedule_eh(ap); 137 ata_port_schedule_eh(ap);
138 spin_unlock_irqrestore(ap->lock, flags); 138 spin_unlock_irqrestore(ap->lock, flags);
139 139
140 return count; 140 return count;
141 } 141 }
142 142
143 static ssize_t ata_scsi_lpm_show(struct device *dev, 143 static ssize_t ata_scsi_lpm_show(struct device *dev,
144 struct device_attribute *attr, char *buf) 144 struct device_attribute *attr, char *buf)
145 { 145 {
146 struct Scsi_Host *shost = class_to_shost(dev); 146 struct Scsi_Host *shost = class_to_shost(dev);
147 struct ata_port *ap = ata_shost_to_port(shost); 147 struct ata_port *ap = ata_shost_to_port(shost);
148 148
149 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 149 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
150 return -EINVAL; 150 return -EINVAL;
151 151
152 return snprintf(buf, PAGE_SIZE, "%s\n", 152 return snprintf(buf, PAGE_SIZE, "%s\n",
153 ata_lpm_policy_names[ap->target_lpm_policy]); 153 ata_lpm_policy_names[ap->target_lpm_policy]);
154 } 154 }
155 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 155 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
156 ata_scsi_lpm_show, ata_scsi_lpm_store); 156 ata_scsi_lpm_show, ata_scsi_lpm_store);
157 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 157 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
158 158
159 static ssize_t ata_scsi_park_show(struct device *device, 159 static ssize_t ata_scsi_park_show(struct device *device,
160 struct device_attribute *attr, char *buf) 160 struct device_attribute *attr, char *buf)
161 { 161 {
162 struct scsi_device *sdev = to_scsi_device(device); 162 struct scsi_device *sdev = to_scsi_device(device);
163 struct ata_port *ap; 163 struct ata_port *ap;
164 struct ata_link *link; 164 struct ata_link *link;
165 struct ata_device *dev; 165 struct ata_device *dev;
166 unsigned long flags, now; 166 unsigned long flags, now;
167 unsigned int uninitialized_var(msecs); 167 unsigned int uninitialized_var(msecs);
168 int rc = 0; 168 int rc = 0;
169 169
170 ap = ata_shost_to_port(sdev->host); 170 ap = ata_shost_to_port(sdev->host);
171 171
172 spin_lock_irqsave(ap->lock, flags); 172 spin_lock_irqsave(ap->lock, flags);
173 dev = ata_scsi_find_dev(ap, sdev); 173 dev = ata_scsi_find_dev(ap, sdev);
174 if (!dev) { 174 if (!dev) {
175 rc = -ENODEV; 175 rc = -ENODEV;
176 goto unlock; 176 goto unlock;
177 } 177 }
178 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 178 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
179 rc = -EOPNOTSUPP; 179 rc = -EOPNOTSUPP;
180 goto unlock; 180 goto unlock;
181 } 181 }
182 182
183 link = dev->link; 183 link = dev->link;
184 now = jiffies; 184 now = jiffies;
185 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 185 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
186 link->eh_context.unloaded_mask & (1 << dev->devno) && 186 link->eh_context.unloaded_mask & (1 << dev->devno) &&
187 time_after(dev->unpark_deadline, now)) 187 time_after(dev->unpark_deadline, now))
188 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 188 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
189 else 189 else
190 msecs = 0; 190 msecs = 0;
191 191
192 unlock: 192 unlock:
193 spin_unlock_irq(ap->lock); 193 spin_unlock_irq(ap->lock);
194 194
195 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 195 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
196 } 196 }
197 197
198 static ssize_t ata_scsi_park_store(struct device *device, 198 static ssize_t ata_scsi_park_store(struct device *device,
199 struct device_attribute *attr, 199 struct device_attribute *attr,
200 const char *buf, size_t len) 200 const char *buf, size_t len)
201 { 201 {
202 struct scsi_device *sdev = to_scsi_device(device); 202 struct scsi_device *sdev = to_scsi_device(device);
203 struct ata_port *ap; 203 struct ata_port *ap;
204 struct ata_device *dev; 204 struct ata_device *dev;
205 long int input; 205 long int input;
206 unsigned long flags; 206 unsigned long flags;
207 int rc; 207 int rc;
208 208
209 rc = strict_strtol(buf, 10, &input); 209 rc = strict_strtol(buf, 10, &input);
210 if (rc || input < -2) 210 if (rc || input < -2)
211 return -EINVAL; 211 return -EINVAL;
212 if (input > ATA_TMOUT_MAX_PARK) { 212 if (input > ATA_TMOUT_MAX_PARK) {
213 rc = -EOVERFLOW; 213 rc = -EOVERFLOW;
214 input = ATA_TMOUT_MAX_PARK; 214 input = ATA_TMOUT_MAX_PARK;
215 } 215 }
216 216
217 ap = ata_shost_to_port(sdev->host); 217 ap = ata_shost_to_port(sdev->host);
218 218
219 spin_lock_irqsave(ap->lock, flags); 219 spin_lock_irqsave(ap->lock, flags);
220 dev = ata_scsi_find_dev(ap, sdev); 220 dev = ata_scsi_find_dev(ap, sdev);
221 if (unlikely(!dev)) { 221 if (unlikely(!dev)) {
222 rc = -ENODEV; 222 rc = -ENODEV;
223 goto unlock; 223 goto unlock;
224 } 224 }
225 if (dev->class != ATA_DEV_ATA) { 225 if (dev->class != ATA_DEV_ATA) {
226 rc = -EOPNOTSUPP; 226 rc = -EOPNOTSUPP;
227 goto unlock; 227 goto unlock;
228 } 228 }
229 229
230 if (input >= 0) { 230 if (input >= 0) {
231 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 231 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
232 rc = -EOPNOTSUPP; 232 rc = -EOPNOTSUPP;
233 goto unlock; 233 goto unlock;
234 } 234 }
235 235
236 dev->unpark_deadline = ata_deadline(jiffies, input); 236 dev->unpark_deadline = ata_deadline(jiffies, input);
237 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 237 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
238 ata_port_schedule_eh(ap); 238 ata_port_schedule_eh(ap);
239 complete(&ap->park_req_pending); 239 complete(&ap->park_req_pending);
240 } else { 240 } else {
241 switch (input) { 241 switch (input) {
242 case -1: 242 case -1:
243 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 243 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
244 break; 244 break;
245 case -2: 245 case -2:
246 dev->flags |= ATA_DFLAG_NO_UNLOAD; 246 dev->flags |= ATA_DFLAG_NO_UNLOAD;
247 break; 247 break;
248 } 248 }
249 } 249 }
250 unlock: 250 unlock:
251 spin_unlock_irqrestore(ap->lock, flags); 251 spin_unlock_irqrestore(ap->lock, flags);
252 252
253 return rc ? rc : len; 253 return rc ? rc : len;
254 } 254 }
255 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 255 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
256 ata_scsi_park_show, ata_scsi_park_store); 256 ata_scsi_park_show, ata_scsi_park_store);
257 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 257 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
258 258
259 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) 259 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
260 { 260 {
261 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 261 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
262 262
263 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); 263 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
264 } 264 }
265 265
266 static ssize_t 266 static ssize_t
267 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 267 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
268 const char *buf, size_t count) 268 const char *buf, size_t count)
269 { 269 {
270 struct Scsi_Host *shost = class_to_shost(dev); 270 struct Scsi_Host *shost = class_to_shost(dev);
271 struct ata_port *ap = ata_shost_to_port(shost); 271 struct ata_port *ap = ata_shost_to_port(shost);
272 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 272 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
273 return ap->ops->em_store(ap, buf, count); 273 return ap->ops->em_store(ap, buf, count);
274 return -EINVAL; 274 return -EINVAL;
275 } 275 }
276 276
277 static ssize_t 277 static ssize_t
278 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 278 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
279 char *buf) 279 char *buf)
280 { 280 {
281 struct Scsi_Host *shost = class_to_shost(dev); 281 struct Scsi_Host *shost = class_to_shost(dev);
282 struct ata_port *ap = ata_shost_to_port(shost); 282 struct ata_port *ap = ata_shost_to_port(shost);
283 283
284 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 284 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
285 return ap->ops->em_show(ap, buf); 285 return ap->ops->em_show(ap, buf);
286 return -EINVAL; 286 return -EINVAL;
287 } 287 }
288 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 288 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
289 ata_scsi_em_message_show, ata_scsi_em_message_store); 289 ata_scsi_em_message_show, ata_scsi_em_message_store);
290 EXPORT_SYMBOL_GPL(dev_attr_em_message); 290 EXPORT_SYMBOL_GPL(dev_attr_em_message);
291 291
292 static ssize_t 292 static ssize_t
293 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 293 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
294 char *buf) 294 char *buf)
295 { 295 {
296 struct Scsi_Host *shost = class_to_shost(dev); 296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct ata_port *ap = ata_shost_to_port(shost); 297 struct ata_port *ap = ata_shost_to_port(shost);
298 298
299 return snprintf(buf, 23, "%d\n", ap->em_message_type); 299 return snprintf(buf, 23, "%d\n", ap->em_message_type);
300 } 300 }
301 DEVICE_ATTR(em_message_type, S_IRUGO, 301 DEVICE_ATTR(em_message_type, S_IRUGO,
302 ata_scsi_em_message_type_show, NULL); 302 ata_scsi_em_message_type_show, NULL);
303 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 303 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
304 304
305 static ssize_t 305 static ssize_t
306 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 306 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
307 char *buf) 307 char *buf)
308 { 308 {
309 struct scsi_device *sdev = to_scsi_device(dev); 309 struct scsi_device *sdev = to_scsi_device(dev);
310 struct ata_port *ap = ata_shost_to_port(sdev->host); 310 struct ata_port *ap = ata_shost_to_port(sdev->host);
311 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 311 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
312 312
313 if (atadev && ap->ops->sw_activity_show && 313 if (atadev && ap->ops->sw_activity_show &&
314 (ap->flags & ATA_FLAG_SW_ACTIVITY)) 314 (ap->flags & ATA_FLAG_SW_ACTIVITY))
315 return ap->ops->sw_activity_show(atadev, buf); 315 return ap->ops->sw_activity_show(atadev, buf);
316 return -EINVAL; 316 return -EINVAL;
317 } 317 }
318 318
319 static ssize_t 319 static ssize_t
320 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 320 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
321 const char *buf, size_t count) 321 const char *buf, size_t count)
322 { 322 {
323 struct scsi_device *sdev = to_scsi_device(dev); 323 struct scsi_device *sdev = to_scsi_device(dev);
324 struct ata_port *ap = ata_shost_to_port(sdev->host); 324 struct ata_port *ap = ata_shost_to_port(sdev->host);
325 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 325 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
326 enum sw_activity val; 326 enum sw_activity val;
327 int rc; 327 int rc;
328 328
329 if (atadev && ap->ops->sw_activity_store && 329 if (atadev && ap->ops->sw_activity_store &&
330 (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 330 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
331 val = simple_strtoul(buf, NULL, 0); 331 val = simple_strtoul(buf, NULL, 0);
332 switch (val) { 332 switch (val) {
333 case OFF: case BLINK_ON: case BLINK_OFF: 333 case OFF: case BLINK_ON: case BLINK_OFF:
334 rc = ap->ops->sw_activity_store(atadev, val); 334 rc = ap->ops->sw_activity_store(atadev, val);
335 if (!rc) 335 if (!rc)
336 return count; 336 return count;
337 else 337 else
338 return rc; 338 return rc;
339 } 339 }
340 } 340 }
341 return -EINVAL; 341 return -EINVAL;
342 } 342 }
343 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 343 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
344 ata_scsi_activity_store); 344 ata_scsi_activity_store);
345 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 345 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
346 346
347 struct device_attribute *ata_common_sdev_attrs[] = { 347 struct device_attribute *ata_common_sdev_attrs[] = {
348 &dev_attr_unload_heads, 348 &dev_attr_unload_heads,
349 NULL 349 NULL
350 }; 350 };
351 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 351 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
352 352
353 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd) 353 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
354 { 354 {
355 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); 355 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
356 /* "Invalid field in cbd" */ 356 /* "Invalid field in cbd" */
357 cmd->scsi_done(cmd); 357 cmd->scsi_done(cmd);
358 } 358 }
359 359
360 /** 360 /**
361 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 361 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
362 * @sdev: SCSI device for which BIOS geometry is to be determined 362 * @sdev: SCSI device for which BIOS geometry is to be determined
363 * @bdev: block device associated with @sdev 363 * @bdev: block device associated with @sdev
364 * @capacity: capacity of SCSI device 364 * @capacity: capacity of SCSI device
365 * @geom: location to which geometry will be output 365 * @geom: location to which geometry will be output
366 * 366 *
367 * Generic bios head/sector/cylinder calculator 367 * Generic bios head/sector/cylinder calculator
368 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 368 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
369 * mapping. Some situations may arise where the disk is not 369 * mapping. Some situations may arise where the disk is not
370 * bootable if this is not used. 370 * bootable if this is not used.
371 * 371 *
372 * LOCKING: 372 * LOCKING:
373 * Defined by the SCSI layer. We don't really care. 373 * Defined by the SCSI layer. We don't really care.
374 * 374 *
375 * RETURNS: 375 * RETURNS:
376 * Zero. 376 * Zero.
377 */ 377 */
378 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 378 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
379 sector_t capacity, int geom[]) 379 sector_t capacity, int geom[])
380 { 380 {
381 geom[0] = 255; 381 geom[0] = 255;
382 geom[1] = 63; 382 geom[1] = 63;
383 sector_div(capacity, 255*63); 383 sector_div(capacity, 255*63);
384 geom[2] = capacity; 384 geom[2] = capacity;
385 385
386 return 0; 386 return 0;
387 } 387 }
388 388
389 /** 389 /**
390 * ata_scsi_unlock_native_capacity - unlock native capacity 390 * ata_scsi_unlock_native_capacity - unlock native capacity
391 * @sdev: SCSI device to adjust device capacity for 391 * @sdev: SCSI device to adjust device capacity for
392 * 392 *
393 * This function is called if a partition on @sdev extends beyond 393 * This function is called if a partition on @sdev extends beyond
394 * the end of the device. It requests EH to unlock HPA. 394 * the end of the device. It requests EH to unlock HPA.
395 * 395 *
396 * LOCKING: 396 * LOCKING:
397 * Defined by the SCSI layer. Might sleep. 397 * Defined by the SCSI layer. Might sleep.
398 */ 398 */
399 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 399 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
400 { 400 {
401 struct ata_port *ap = ata_shost_to_port(sdev->host); 401 struct ata_port *ap = ata_shost_to_port(sdev->host);
402 struct ata_device *dev; 402 struct ata_device *dev;
403 unsigned long flags; 403 unsigned long flags;
404 404
405 spin_lock_irqsave(ap->lock, flags); 405 spin_lock_irqsave(ap->lock, flags);
406 406
407 dev = ata_scsi_find_dev(ap, sdev); 407 dev = ata_scsi_find_dev(ap, sdev);
408 if (dev && dev->n_sectors < dev->n_native_sectors) { 408 if (dev && dev->n_sectors < dev->n_native_sectors) {
409 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 409 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
410 dev->link->eh_info.action |= ATA_EH_RESET; 410 dev->link->eh_info.action |= ATA_EH_RESET;
411 ata_port_schedule_eh(ap); 411 ata_port_schedule_eh(ap);
412 } 412 }
413 413
414 spin_unlock_irqrestore(ap->lock, flags); 414 spin_unlock_irqrestore(ap->lock, flags);
415 ata_port_wait_eh(ap); 415 ata_port_wait_eh(ap);
416 } 416 }
417 417
418 /** 418 /**
419 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 419 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
420 * @ap: target port 420 * @ap: target port
421 * @sdev: SCSI device to get identify data for 421 * @sdev: SCSI device to get identify data for
422 * @arg: User buffer area for identify data 422 * @arg: User buffer area for identify data
423 * 423 *
424 * LOCKING: 424 * LOCKING:
425 * Defined by the SCSI layer. We don't really care. 425 * Defined by the SCSI layer. We don't really care.
426 * 426 *
427 * RETURNS: 427 * RETURNS:
428 * Zero on success, negative errno on error. 428 * Zero on success, negative errno on error.
429 */ 429 */
430 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 430 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
431 void __user *arg) 431 void __user *arg)
432 { 432 {
433 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 433 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
434 u16 __user *dst = arg; 434 u16 __user *dst = arg;
435 char buf[40]; 435 char buf[40];
436 436
437 if (!dev) 437 if (!dev)
438 return -ENOMSG; 438 return -ENOMSG;
439 439
440 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 440 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
441 return -EFAULT; 441 return -EFAULT;
442 442
443 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 443 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
444 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 444 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
445 return -EFAULT; 445 return -EFAULT;
446 446
447 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 447 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
448 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 448 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
449 return -EFAULT; 449 return -EFAULT;
450 450
451 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 451 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
452 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 452 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
453 return -EFAULT; 453 return -EFAULT;
454 454
455 return 0; 455 return 0;
456 } 456 }
457 457
458 /** 458 /**
459 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 459 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
460 * @scsidev: Device to which we are issuing command 460 * @scsidev: Device to which we are issuing command
461 * @arg: User provided data for issuing command 461 * @arg: User provided data for issuing command
462 * 462 *
463 * LOCKING: 463 * LOCKING:
464 * Defined by the SCSI layer. We don't really care. 464 * Defined by the SCSI layer. We don't really care.
465 * 465 *
466 * RETURNS: 466 * RETURNS:
467 * Zero on success, negative errno on error. 467 * Zero on success, negative errno on error.
468 */ 468 */
469 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 469 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
470 { 470 {
471 int rc = 0; 471 int rc = 0;
472 u8 scsi_cmd[MAX_COMMAND_SIZE]; 472 u8 scsi_cmd[MAX_COMMAND_SIZE];
473 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 473 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
474 int argsize = 0; 474 int argsize = 0;
475 enum dma_data_direction data_dir; 475 enum dma_data_direction data_dir;
476 int cmd_result; 476 int cmd_result;
477 477
478 if (arg == NULL) 478 if (arg == NULL)
479 return -EINVAL; 479 return -EINVAL;
480 480
481 if (copy_from_user(args, arg, sizeof(args))) 481 if (copy_from_user(args, arg, sizeof(args)))
482 return -EFAULT; 482 return -EFAULT;
483 483
484 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 484 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
485 if (!sensebuf) 485 if (!sensebuf)
486 return -ENOMEM; 486 return -ENOMEM;
487 487
488 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 488 memset(scsi_cmd, 0, sizeof(scsi_cmd));
489 489
490 if (args[3]) { 490 if (args[3]) {
491 argsize = ATA_SECT_SIZE * args[3]; 491 argsize = ATA_SECT_SIZE * args[3];
492 argbuf = kmalloc(argsize, GFP_KERNEL); 492 argbuf = kmalloc(argsize, GFP_KERNEL);
493 if (argbuf == NULL) { 493 if (argbuf == NULL) {
494 rc = -ENOMEM; 494 rc = -ENOMEM;
495 goto error; 495 goto error;
496 } 496 }
497 497
498 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 498 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
499 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 499 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
500 block count in sector count field */ 500 block count in sector count field */
501 data_dir = DMA_FROM_DEVICE; 501 data_dir = DMA_FROM_DEVICE;
502 } else { 502 } else {
503 scsi_cmd[1] = (3 << 1); /* Non-data */ 503 scsi_cmd[1] = (3 << 1); /* Non-data */
504 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 504 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
505 data_dir = DMA_NONE; 505 data_dir = DMA_NONE;
506 } 506 }
507 507
508 scsi_cmd[0] = ATA_16; 508 scsi_cmd[0] = ATA_16;
509 509
510 scsi_cmd[4] = args[2]; 510 scsi_cmd[4] = args[2];
511 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 511 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
512 scsi_cmd[6] = args[3]; 512 scsi_cmd[6] = args[3];
513 scsi_cmd[8] = args[1]; 513 scsi_cmd[8] = args[1];
514 scsi_cmd[10] = 0x4f; 514 scsi_cmd[10] = 0x4f;
515 scsi_cmd[12] = 0xc2; 515 scsi_cmd[12] = 0xc2;
516 } else { 516 } else {
517 scsi_cmd[6] = args[1]; 517 scsi_cmd[6] = args[1];
518 } 518 }
519 scsi_cmd[14] = args[0]; 519 scsi_cmd[14] = args[0];
520 520
521 /* Good values for timeout and retries? Values below 521 /* Good values for timeout and retries? Values below
522 from scsi_ioctl_send_command() for default case... */ 522 from scsi_ioctl_send_command() for default case... */
523 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 523 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
524 sensebuf, (10*HZ), 5, 0, NULL); 524 sensebuf, (10*HZ), 5, 0, NULL);
525 525
526 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 526 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
527 u8 *desc = sensebuf + 8; 527 u8 *desc = sensebuf + 8;
528 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 528 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
529 529
530 /* If we set cc then ATA pass-through will cause a 530 /* If we set cc then ATA pass-through will cause a
531 * check condition even if no error. Filter that. */ 531 * check condition even if no error. Filter that. */
532 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 532 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
533 struct scsi_sense_hdr sshdr; 533 struct scsi_sense_hdr sshdr;
534 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 534 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
535 &sshdr); 535 &sshdr);
536 if (sshdr.sense_key == RECOVERED_ERROR && 536 if (sshdr.sense_key == RECOVERED_ERROR &&
537 sshdr.asc == 0 && sshdr.ascq == 0x1d) 537 sshdr.asc == 0 && sshdr.ascq == 0x1d)
538 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 538 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
539 } 539 }
540 540
541 /* Send userspace a few ATA registers (same as drivers/ide) */ 541 /* Send userspace a few ATA registers (same as drivers/ide) */
542 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 542 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
543 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 543 desc[0] == 0x09) { /* code is "ATA Descriptor" */
544 args[0] = desc[13]; /* status */ 544 args[0] = desc[13]; /* status */
545 args[1] = desc[3]; /* error */ 545 args[1] = desc[3]; /* error */
546 args[2] = desc[5]; /* sector count (0:7) */ 546 args[2] = desc[5]; /* sector count (0:7) */
547 if (copy_to_user(arg, args, sizeof(args))) 547 if (copy_to_user(arg, args, sizeof(args)))
548 rc = -EFAULT; 548 rc = -EFAULT;
549 } 549 }
550 } 550 }
551 551
552 552
553 if (cmd_result) { 553 if (cmd_result) {
554 rc = -EIO; 554 rc = -EIO;
555 goto error; 555 goto error;
556 } 556 }
557 557
558 if ((argbuf) 558 if ((argbuf)
559 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 559 && copy_to_user(arg + sizeof(args), argbuf, argsize))
560 rc = -EFAULT; 560 rc = -EFAULT;
561 error: 561 error:
562 kfree(sensebuf); 562 kfree(sensebuf);
563 kfree(argbuf); 563 kfree(argbuf);
564 return rc; 564 return rc;
565 } 565 }
566 566
567 /** 567 /**
568 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 568 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
569 * @scsidev: Device to which we are issuing command 569 * @scsidev: Device to which we are issuing command
570 * @arg: User provided data for issuing command 570 * @arg: User provided data for issuing command
571 * 571 *
572 * LOCKING: 572 * LOCKING:
573 * Defined by the SCSI layer. We don't really care. 573 * Defined by the SCSI layer. We don't really care.
574 * 574 *
575 * RETURNS: 575 * RETURNS:
576 * Zero on success, negative errno on error. 576 * Zero on success, negative errno on error.
577 */ 577 */
578 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 578 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
579 { 579 {
580 int rc = 0; 580 int rc = 0;
581 u8 scsi_cmd[MAX_COMMAND_SIZE]; 581 u8 scsi_cmd[MAX_COMMAND_SIZE];
582 u8 args[7], *sensebuf = NULL; 582 u8 args[7], *sensebuf = NULL;
583 int cmd_result; 583 int cmd_result;
584 584
585 if (arg == NULL) 585 if (arg == NULL)
586 return -EINVAL; 586 return -EINVAL;
587 587
588 if (copy_from_user(args, arg, sizeof(args))) 588 if (copy_from_user(args, arg, sizeof(args)))
589 return -EFAULT; 589 return -EFAULT;
590 590
591 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 591 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
592 if (!sensebuf) 592 if (!sensebuf)
593 return -ENOMEM; 593 return -ENOMEM;
594 594
595 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 595 memset(scsi_cmd, 0, sizeof(scsi_cmd));
596 scsi_cmd[0] = ATA_16; 596 scsi_cmd[0] = ATA_16;
597 scsi_cmd[1] = (3 << 1); /* Non-data */ 597 scsi_cmd[1] = (3 << 1); /* Non-data */
598 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 598 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
599 scsi_cmd[4] = args[1]; 599 scsi_cmd[4] = args[1];
600 scsi_cmd[6] = args[2]; 600 scsi_cmd[6] = args[2];
601 scsi_cmd[8] = args[3]; 601 scsi_cmd[8] = args[3];
602 scsi_cmd[10] = args[4]; 602 scsi_cmd[10] = args[4];
603 scsi_cmd[12] = args[5]; 603 scsi_cmd[12] = args[5];
604 scsi_cmd[13] = args[6] & 0x4f; 604 scsi_cmd[13] = args[6] & 0x4f;
605 scsi_cmd[14] = args[0]; 605 scsi_cmd[14] = args[0];
606 606
607 /* Good values for timeout and retries? Values below 607 /* Good values for timeout and retries? Values below
608 from scsi_ioctl_send_command() for default case... */ 608 from scsi_ioctl_send_command() for default case... */
609 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 609 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
610 sensebuf, (10*HZ), 5, 0, NULL); 610 sensebuf, (10*HZ), 5, 0, NULL);
611 611
612 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 612 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
613 u8 *desc = sensebuf + 8; 613 u8 *desc = sensebuf + 8;
614 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 614 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
615 615
616 /* If we set cc then ATA pass-through will cause a 616 /* If we set cc then ATA pass-through will cause a
617 * check condition even if no error. Filter that. */ 617 * check condition even if no error. Filter that. */
618 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 618 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
619 struct scsi_sense_hdr sshdr; 619 struct scsi_sense_hdr sshdr;
620 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 620 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
621 &sshdr); 621 &sshdr);
622 if (sshdr.sense_key == RECOVERED_ERROR && 622 if (sshdr.sense_key == RECOVERED_ERROR &&
623 sshdr.asc == 0 && sshdr.ascq == 0x1d) 623 sshdr.asc == 0 && sshdr.ascq == 0x1d)
624 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 624 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
625 } 625 }
626 626
627 /* Send userspace ATA registers */ 627 /* Send userspace ATA registers */
628 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 628 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
629 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 629 desc[0] == 0x09) {/* code is "ATA Descriptor" */
630 args[0] = desc[13]; /* status */ 630 args[0] = desc[13]; /* status */
631 args[1] = desc[3]; /* error */ 631 args[1] = desc[3]; /* error */
632 args[2] = desc[5]; /* sector count (0:7) */ 632 args[2] = desc[5]; /* sector count (0:7) */
633 args[3] = desc[7]; /* lbal */ 633 args[3] = desc[7]; /* lbal */
634 args[4] = desc[9]; /* lbam */ 634 args[4] = desc[9]; /* lbam */
635 args[5] = desc[11]; /* lbah */ 635 args[5] = desc[11]; /* lbah */
636 args[6] = desc[12]; /* select */ 636 args[6] = desc[12]; /* select */
637 if (copy_to_user(arg, args, sizeof(args))) 637 if (copy_to_user(arg, args, sizeof(args)))
638 rc = -EFAULT; 638 rc = -EFAULT;
639 } 639 }
640 } 640 }
641 641
642 if (cmd_result) { 642 if (cmd_result) {
643 rc = -EIO; 643 rc = -EIO;
644 goto error; 644 goto error;
645 } 645 }
646 646
647 error: 647 error:
648 kfree(sensebuf); 648 kfree(sensebuf);
649 return rc; 649 return rc;
650 } 650 }
651 651
652 static int ata_ioc32(struct ata_port *ap) 652 static int ata_ioc32(struct ata_port *ap)
653 { 653 {
654 if (ap->flags & ATA_FLAG_PIO_DMA) 654 if (ap->flags & ATA_FLAG_PIO_DMA)
655 return 1; 655 return 1;
656 if (ap->pflags & ATA_PFLAG_PIO32) 656 if (ap->pflags & ATA_PFLAG_PIO32)
657 return 1; 657 return 1;
658 return 0; 658 return 0;
659 } 659 }
660 660
661 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 661 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
662 int cmd, void __user *arg) 662 int cmd, void __user *arg)
663 { 663 {
664 int val = -EINVAL, rc = -EINVAL; 664 int val = -EINVAL, rc = -EINVAL;
665 unsigned long flags; 665 unsigned long flags;
666 666
667 switch (cmd) { 667 switch (cmd) {
668 case ATA_IOC_GET_IO32: 668 case ATA_IOC_GET_IO32:
669 spin_lock_irqsave(ap->lock, flags); 669 spin_lock_irqsave(ap->lock, flags);
670 val = ata_ioc32(ap); 670 val = ata_ioc32(ap);
671 spin_unlock_irqrestore(ap->lock, flags); 671 spin_unlock_irqrestore(ap->lock, flags);
672 if (copy_to_user(arg, &val, 1)) 672 if (copy_to_user(arg, &val, 1))
673 return -EFAULT; 673 return -EFAULT;
674 return 0; 674 return 0;
675 675
676 case ATA_IOC_SET_IO32: 676 case ATA_IOC_SET_IO32:
677 val = (unsigned long) arg; 677 val = (unsigned long) arg;
678 rc = 0; 678 rc = 0;
679 spin_lock_irqsave(ap->lock, flags); 679 spin_lock_irqsave(ap->lock, flags);
680 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 680 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
681 if (val) 681 if (val)
682 ap->pflags |= ATA_PFLAG_PIO32; 682 ap->pflags |= ATA_PFLAG_PIO32;
683 else 683 else
684 ap->pflags &= ~ATA_PFLAG_PIO32; 684 ap->pflags &= ~ATA_PFLAG_PIO32;
685 } else { 685 } else {
686 if (val != ata_ioc32(ap)) 686 if (val != ata_ioc32(ap))
687 rc = -EINVAL; 687 rc = -EINVAL;
688 } 688 }
689 spin_unlock_irqrestore(ap->lock, flags); 689 spin_unlock_irqrestore(ap->lock, flags);
690 return rc; 690 return rc;
691 691
692 case HDIO_GET_IDENTITY: 692 case HDIO_GET_IDENTITY:
693 return ata_get_identity(ap, scsidev, arg); 693 return ata_get_identity(ap, scsidev, arg);
694 694
695 case HDIO_DRIVE_CMD: 695 case HDIO_DRIVE_CMD:
696 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 696 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
697 return -EACCES; 697 return -EACCES;
698 return ata_cmd_ioctl(scsidev, arg); 698 return ata_cmd_ioctl(scsidev, arg);
699 699
700 case HDIO_DRIVE_TASK: 700 case HDIO_DRIVE_TASK:
701 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 701 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
702 return -EACCES; 702 return -EACCES;
703 return ata_task_ioctl(scsidev, arg); 703 return ata_task_ioctl(scsidev, arg);
704 704
705 default: 705 default:
706 rc = -ENOTTY; 706 rc = -ENOTTY;
707 break; 707 break;
708 } 708 }
709 709
710 return rc; 710 return rc;
711 } 711 }
712 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 712 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
713 713
714 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 714 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
715 { 715 {
716 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 716 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
717 scsidev, cmd, arg); 717 scsidev, cmd, arg);
718 } 718 }
719 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 719 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
720 720
721 /** 721 /**
722 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 722 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
723 * @dev: ATA device to which the new command is attached 723 * @dev: ATA device to which the new command is attached
724 * @cmd: SCSI command that originated this ATA command 724 * @cmd: SCSI command that originated this ATA command
725 * 725 *
726 * Obtain a reference to an unused ata_queued_cmd structure, 726 * Obtain a reference to an unused ata_queued_cmd structure,
727 * which is the basic libata structure representing a single 727 * which is the basic libata structure representing a single
728 * ATA command sent to the hardware. 728 * ATA command sent to the hardware.
729 * 729 *
730 * If a command was available, fill in the SCSI-specific 730 * If a command was available, fill in the SCSI-specific
731 * portions of the structure with information on the 731 * portions of the structure with information on the
732 * current command. 732 * current command.
733 * 733 *
734 * LOCKING: 734 * LOCKING:
735 * spin_lock_irqsave(host lock) 735 * spin_lock_irqsave(host lock)
736 * 736 *
737 * RETURNS: 737 * RETURNS:
738 * Command allocated, or %NULL if none available. 738 * Command allocated, or %NULL if none available.
739 */ 739 */
740 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 740 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
741 struct scsi_cmnd *cmd) 741 struct scsi_cmnd *cmd)
742 { 742 {
743 struct ata_queued_cmd *qc; 743 struct ata_queued_cmd *qc;
744 744
745 qc = ata_qc_new_init(dev); 745 qc = ata_qc_new_init(dev);
746 if (qc) { 746 if (qc) {
747 qc->scsicmd = cmd; 747 qc->scsicmd = cmd;
748 qc->scsidone = cmd->scsi_done; 748 qc->scsidone = cmd->scsi_done;
749 749
750 qc->sg = scsi_sglist(cmd); 750 qc->sg = scsi_sglist(cmd);
751 qc->n_elem = scsi_sg_count(cmd); 751 qc->n_elem = scsi_sg_count(cmd);
752 } else { 752 } else {
753 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 753 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
754 cmd->scsi_done(cmd); 754 cmd->scsi_done(cmd);
755 } 755 }
756 756
757 return qc; 757 return qc;
758 } 758 }
759 759
760 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 760 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
761 { 761 {
762 struct scsi_cmnd *scmd = qc->scsicmd; 762 struct scsi_cmnd *scmd = qc->scsicmd;
763 763
764 qc->extrabytes = scmd->request->extra_len; 764 qc->extrabytes = scmd->request->extra_len;
765 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 765 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
766 } 766 }
767 767
768 /** 768 /**
769 * ata_dump_status - user friendly display of error info 769 * ata_dump_status - user friendly display of error info
770 * @id: id of the port in question 770 * @id: id of the port in question
771 * @tf: ptr to filled out taskfile 771 * @tf: ptr to filled out taskfile
772 * 772 *
773 * Decode and dump the ATA error/status registers for the user so 773 * Decode and dump the ATA error/status registers for the user so
774 * that they have some idea what really happened at the non 774 * that they have some idea what really happened at the non
775 * make-believe layer. 775 * make-believe layer.
776 * 776 *
777 * LOCKING: 777 * LOCKING:
778 * inherited from caller 778 * inherited from caller
779 */ 779 */
780 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 780 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
781 { 781 {
782 u8 stat = tf->command, err = tf->feature; 782 u8 stat = tf->command, err = tf->feature;
783 783
784 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 784 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
785 if (stat & ATA_BUSY) { 785 if (stat & ATA_BUSY) {
786 printk("Busy }\n"); /* Data is not valid in this case */ 786 printk("Busy }\n"); /* Data is not valid in this case */
787 } else { 787 } else {
788 if (stat & 0x40) printk("DriveReady "); 788 if (stat & 0x40) printk("DriveReady ");
789 if (stat & 0x20) printk("DeviceFault "); 789 if (stat & 0x20) printk("DeviceFault ");
790 if (stat & 0x10) printk("SeekComplete "); 790 if (stat & 0x10) printk("SeekComplete ");
791 if (stat & 0x08) printk("DataRequest "); 791 if (stat & 0x08) printk("DataRequest ");
792 if (stat & 0x04) printk("CorrectedError "); 792 if (stat & 0x04) printk("CorrectedError ");
793 if (stat & 0x02) printk("Index "); 793 if (stat & 0x02) printk("Index ");
794 if (stat & 0x01) printk("Error "); 794 if (stat & 0x01) printk("Error ");
795 printk("}\n"); 795 printk("}\n");
796 796
797 if (err) { 797 if (err) {
798 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 798 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
799 if (err & 0x04) printk("DriveStatusError "); 799 if (err & 0x04) printk("DriveStatusError ");
800 if (err & 0x80) { 800 if (err & 0x80) {
801 if (err & 0x04) printk("BadCRC "); 801 if (err & 0x04) printk("BadCRC ");
802 else printk("Sector "); 802 else printk("Sector ");
803 } 803 }
804 if (err & 0x40) printk("UncorrectableError "); 804 if (err & 0x40) printk("UncorrectableError ");
805 if (err & 0x10) printk("SectorIdNotFound "); 805 if (err & 0x10) printk("SectorIdNotFound ");
806 if (err & 0x02) printk("TrackZeroNotFound "); 806 if (err & 0x02) printk("TrackZeroNotFound ");
807 if (err & 0x01) printk("AddrMarkNotFound "); 807 if (err & 0x01) printk("AddrMarkNotFound ");
808 printk("}\n"); 808 printk("}\n");
809 } 809 }
810 } 810 }
811 } 811 }
812 812
813 /** 813 /**
814 * ata_to_sense_error - convert ATA error to SCSI error 814 * ata_to_sense_error - convert ATA error to SCSI error
815 * @id: ATA device number 815 * @id: ATA device number
816 * @drv_stat: value contained in ATA status register 816 * @drv_stat: value contained in ATA status register
817 * @drv_err: value contained in ATA error register 817 * @drv_err: value contained in ATA error register
818 * @sk: the sense key we'll fill out 818 * @sk: the sense key we'll fill out
819 * @asc: the additional sense code we'll fill out 819 * @asc: the additional sense code we'll fill out
820 * @ascq: the additional sense code qualifier we'll fill out 820 * @ascq: the additional sense code qualifier we'll fill out
821 * @verbose: be verbose 821 * @verbose: be verbose
822 * 822 *
823 * Converts an ATA error into a SCSI error. Fill out pointers to 823 * Converts an ATA error into a SCSI error. Fill out pointers to
824 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 824 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
825 * format sense blocks. 825 * format sense blocks.
826 * 826 *
827 * LOCKING: 827 * LOCKING:
828 * spin_lock_irqsave(host lock) 828 * spin_lock_irqsave(host lock)
829 */ 829 */
830 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 830 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
831 u8 *asc, u8 *ascq, int verbose) 831 u8 *asc, u8 *ascq, int verbose)
832 { 832 {
833 int i; 833 int i;
834 834
835 /* Based on the 3ware driver translation table */ 835 /* Based on the 3ware driver translation table */
836 static const unsigned char sense_table[][4] = { 836 static const unsigned char sense_table[][4] = {
837 /* BBD|ECC|ID|MAR */ 837 /* BBD|ECC|ID|MAR */
838 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 838 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
839 /* BBD|ECC|ID */ 839 /* BBD|ECC|ID */
840 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 840 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
841 /* ECC|MC|MARK */ 841 /* ECC|MC|MARK */
842 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error 842 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
843 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 843 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
844 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error 844 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
845 /* MC|ID|ABRT|TRK0|MARK */ 845 /* MC|ID|ABRT|TRK0|MARK */
846 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready 846 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
847 /* MCR|MARK */ 847 /* MCR|MARK */
848 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready 848 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
849 /* Bad address mark */ 849 /* Bad address mark */
850 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field 850 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
851 /* TRK0 */ 851 /* TRK0 */
852 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error 852 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
853 /* Abort & !ICRC */ 853 /* Abort: 0x04 is not translated here, see below */
854 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
855 /* Media change request */ 854 /* Media change request */
856 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline 855 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
857 /* SRV */ 856 /* SRV/IDNF */
858 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found 857 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
859 /* Media change */ 858 /* MC */
860 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline 859 {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
861 /* ECC */ 860 /* ECC */
862 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error 861 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
863 /* BBD - block marked bad */ 862 /* BBD - block marked bad */
864 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error 863 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
865 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 864 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
866 }; 865 };
867 static const unsigned char stat_table[][4] = { 866 static const unsigned char stat_table[][4] = {
868 /* Must be first because BUSY means no other bits valid */ 867 /* Must be first because BUSY means no other bits valid */
869 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now 868 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
870 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault 869 {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
871 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now 870 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
872 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered 871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
873 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 872 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
874 }; 873 };
875 874
876 /* 875 /*
877 * Is this an error we can process/parse 876 * Is this an error we can process/parse
878 */ 877 */
879 if (drv_stat & ATA_BUSY) { 878 if (drv_stat & ATA_BUSY) {
880 drv_err = 0; /* Ignore the err bits, they're invalid */ 879 drv_err = 0; /* Ignore the err bits, they're invalid */
881 } 880 }
882 881
883 if (drv_err) { 882 if (drv_err) {
884 /* Look for drv_err */ 883 /* Look for drv_err */
885 for (i = 0; sense_table[i][0] != 0xFF; i++) { 884 for (i = 0; sense_table[i][0] != 0xFF; i++) {
886 /* Look for best matches first */ 885 /* Look for best matches first */
887 if ((sense_table[i][0] & drv_err) == 886 if ((sense_table[i][0] & drv_err) ==
888 sense_table[i][0]) { 887 sense_table[i][0]) {
889 *sk = sense_table[i][1]; 888 *sk = sense_table[i][1];
890 *asc = sense_table[i][2]; 889 *asc = sense_table[i][2];
891 *ascq = sense_table[i][3]; 890 *ascq = sense_table[i][3];
892 goto translate_done; 891 goto translate_done;
893 } 892 }
894 } 893 }
895 /* No immediate match */
896 if (verbose)
897 printk(KERN_WARNING "ata%u: no sense translation for "
898 "error 0x%02x\n", id, drv_err);
899 } 894 }
900 895
901 /* Fall back to interpreting status bits */ 896 /*
897 * Fall back to interpreting status bits. Note that if the drv_err
898 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
899 * is not descriptive enough.
900 */
902 for (i = 0; stat_table[i][0] != 0xFF; i++) { 901 for (i = 0; stat_table[i][0] != 0xFF; i++) {
903 if (stat_table[i][0] & drv_stat) { 902 if (stat_table[i][0] & drv_stat) {
904 *sk = stat_table[i][1]; 903 *sk = stat_table[i][1];
905 *asc = stat_table[i][2]; 904 *asc = stat_table[i][2];
906 *ascq = stat_table[i][3]; 905 *ascq = stat_table[i][3];
907 goto translate_done; 906 goto translate_done;
908 } 907 }
909 } 908 }
910 /* No error? Undecoded? */
911 if (verbose)
912 printk(KERN_WARNING "ata%u: no sense translation for "
913 "status: 0x%02x\n", id, drv_stat);
914 909
915 /* We need a sensible error return here, which is tricky, and one 910 /*
916 that won't cause people to do things like return a disk wrongly */ 911 * We need a sensible error return here, which is tricky, and one
912 * that won't cause people to do things like return a disk wrongly.
913 */
917 *sk = ABORTED_COMMAND; 914 *sk = ABORTED_COMMAND;
918 *asc = 0x00; 915 *asc = 0x00;
919 *ascq = 0x00; 916 *ascq = 0x00;
920 917
921 translate_done: 918 translate_done:
922 if (verbose) 919 if (verbose)
923 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 920 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
924 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
925 id, drv_stat, drv_err, *sk, *asc, *ascq); 922 id, drv_stat, drv_err, *sk, *asc, *ascq);
926 return; 923 return;
927 } 924 }
928 925
929 /* 926 /*
930 * ata_gen_passthru_sense - Generate check condition sense block. 927 * ata_gen_passthru_sense - Generate check condition sense block.
931 * @qc: Command that completed. 928 * @qc: Command that completed.
932 * 929 *
933 * This function is specific to the ATA descriptor format sense 930 * This function is specific to the ATA descriptor format sense
934 * block specified for the ATA pass through commands. Regardless 931 * block specified for the ATA pass through commands. Regardless
935 * of whether the command errored or not, return a sense 932 * of whether the command errored or not, return a sense
936 * block. Copy all controller registers into the sense 933 * block. Copy all controller registers into the sense
937 * block. If there was no error, we get the request from an ATA 934 * block. If there was no error, we get the request from an ATA
938 * passthrough command, so we use the following sense data: 935 * passthrough command, so we use the following sense data:
939 * sk = RECOVERED ERROR 936 * sk = RECOVERED ERROR
940 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 937 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
941 * 938 *
942 * 939 *
943 * LOCKING: 940 * LOCKING:
944 * None. 941 * None.
945 */ 942 */
946 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 943 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
947 { 944 {
948 struct scsi_cmnd *cmd = qc->scsicmd; 945 struct scsi_cmnd *cmd = qc->scsicmd;
949 struct ata_taskfile *tf = &qc->result_tf; 946 struct ata_taskfile *tf = &qc->result_tf;
950 unsigned char *sb = cmd->sense_buffer; 947 unsigned char *sb = cmd->sense_buffer;
951 unsigned char *desc = sb + 8; 948 unsigned char *desc = sb + 8;
952 int verbose = qc->ap->ops->error_handler == NULL; 949 int verbose = qc->ap->ops->error_handler == NULL;
953 950
954 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 951 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
955 952
956 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 953 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
957 954
958 /* 955 /*
959 * Use ata_to_sense_error() to map status register bits 956 * Use ata_to_sense_error() to map status register bits
960 * onto sense key, asc & ascq. 957 * onto sense key, asc & ascq.
961 */ 958 */
962 if (qc->err_mask || 959 if (qc->err_mask ||
963 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 960 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
964 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 961 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
965 &sb[1], &sb[2], &sb[3], verbose); 962 &sb[1], &sb[2], &sb[3], verbose);
966 sb[1] &= 0x0f; 963 sb[1] &= 0x0f;
967 } else { 964 } else {
968 sb[1] = RECOVERED_ERROR; 965 sb[1] = RECOVERED_ERROR;
969 sb[2] = 0; 966 sb[2] = 0;
970 sb[3] = 0x1D; 967 sb[3] = 0x1D;
971 } 968 }
972 969
973 /* 970 /*
974 * Sense data is current and format is descriptor. 971 * Sense data is current and format is descriptor.
975 */ 972 */
976 sb[0] = 0x72; 973 sb[0] = 0x72;
977 974
978 desc[0] = 0x09; 975 desc[0] = 0x09;
979 976
980 /* set length of additional sense data */ 977 /* set length of additional sense data */
981 sb[7] = 14; 978 sb[7] = 14;
982 desc[1] = 12; 979 desc[1] = 12;
983 980
984 /* 981 /*
985 * Copy registers into sense buffer. 982 * Copy registers into sense buffer.
986 */ 983 */
987 desc[2] = 0x00; 984 desc[2] = 0x00;
988 desc[3] = tf->feature; /* == error reg */ 985 desc[3] = tf->feature; /* == error reg */
989 desc[5] = tf->nsect; 986 desc[5] = tf->nsect;
990 desc[7] = tf->lbal; 987 desc[7] = tf->lbal;
991 desc[9] = tf->lbam; 988 desc[9] = tf->lbam;
992 desc[11] = tf->lbah; 989 desc[11] = tf->lbah;
993 desc[12] = tf->device; 990 desc[12] = tf->device;
994 desc[13] = tf->command; /* == status reg */ 991 desc[13] = tf->command; /* == status reg */
995 992
996 /* 993 /*
997 * Fill in Extend bit, and the high order bytes 994 * Fill in Extend bit, and the high order bytes
998 * if applicable. 995 * if applicable.
999 */ 996 */
1000 if (tf->flags & ATA_TFLAG_LBA48) { 997 if (tf->flags & ATA_TFLAG_LBA48) {
1001 desc[2] |= 0x01; 998 desc[2] |= 0x01;
1002 desc[4] = tf->hob_nsect; 999 desc[4] = tf->hob_nsect;
1003 desc[6] = tf->hob_lbal; 1000 desc[6] = tf->hob_lbal;
1004 desc[8] = tf->hob_lbam; 1001 desc[8] = tf->hob_lbam;
1005 desc[10] = tf->hob_lbah; 1002 desc[10] = tf->hob_lbah;
1006 } 1003 }
1007 } 1004 }
1008 1005
1009 /** 1006 /**
1010 * ata_gen_ata_sense - generate a SCSI fixed sense block 1007 * ata_gen_ata_sense - generate a SCSI fixed sense block
1011 * @qc: Command that we are erroring out 1008 * @qc: Command that we are erroring out
1012 * 1009 *
1013 * Generate sense block for a failed ATA command @qc. Descriptor 1010 * Generate sense block for a failed ATA command @qc. Descriptor
1014 * format is used to accommodate LBA48 block address. 1011 * format is used to accommodate LBA48 block address.
1015 * 1012 *
1016 * LOCKING: 1013 * LOCKING:
1017 * None. 1014 * None.
1018 */ 1015 */
1019 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1016 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1020 { 1017 {
1021 struct ata_device *dev = qc->dev; 1018 struct ata_device *dev = qc->dev;
1022 struct scsi_cmnd *cmd = qc->scsicmd; 1019 struct scsi_cmnd *cmd = qc->scsicmd;
1023 struct ata_taskfile *tf = &qc->result_tf; 1020 struct ata_taskfile *tf = &qc->result_tf;
1024 unsigned char *sb = cmd->sense_buffer; 1021 unsigned char *sb = cmd->sense_buffer;
1025 unsigned char *desc = sb + 8; 1022 unsigned char *desc = sb + 8;
1026 int verbose = qc->ap->ops->error_handler == NULL; 1023 int verbose = qc->ap->ops->error_handler == NULL;
1027 u64 block; 1024 u64 block;
1028 1025
1029 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1026 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1030 1027
1031 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1028 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1032 1029
1033 /* sense data is current and format is descriptor */ 1030 /* sense data is current and format is descriptor */
1034 sb[0] = 0x72; 1031 sb[0] = 0x72;
1035 1032
1036 /* Use ata_to_sense_error() to map status register bits 1033 /* Use ata_to_sense_error() to map status register bits
1037 * onto sense key, asc & ascq. 1034 * onto sense key, asc & ascq.
1038 */ 1035 */
1039 if (qc->err_mask || 1036 if (qc->err_mask ||
1040 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1037 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1041 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1038 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1042 &sb[1], &sb[2], &sb[3], verbose); 1039 &sb[1], &sb[2], &sb[3], verbose);
1043 sb[1] &= 0x0f; 1040 sb[1] &= 0x0f;
1044 } 1041 }
1045 1042
1046 block = ata_tf_read_block(&qc->result_tf, dev); 1043 block = ata_tf_read_block(&qc->result_tf, dev);
1047 1044
1048 /* information sense data descriptor */ 1045 /* information sense data descriptor */
1049 sb[7] = 12; 1046 sb[7] = 12;
1050 desc[0] = 0x00; 1047 desc[0] = 0x00;
1051 desc[1] = 10; 1048 desc[1] = 10;
1052 1049
1053 desc[2] |= 0x80; /* valid */ 1050 desc[2] |= 0x80; /* valid */
1054 desc[6] = block >> 40; 1051 desc[6] = block >> 40;
1055 desc[7] = block >> 32; 1052 desc[7] = block >> 32;
1056 desc[8] = block >> 24; 1053 desc[8] = block >> 24;
1057 desc[9] = block >> 16; 1054 desc[9] = block >> 16;
1058 desc[10] = block >> 8; 1055 desc[10] = block >> 8;
1059 desc[11] = block; 1056 desc[11] = block;
1060 } 1057 }
1061 1058
1062 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1059 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1063 { 1060 {
1064 sdev->use_10_for_rw = 1; 1061 sdev->use_10_for_rw = 1;
1065 sdev->use_10_for_ms = 1; 1062 sdev->use_10_for_ms = 1;
1066 sdev->no_report_opcodes = 1; 1063 sdev->no_report_opcodes = 1;
1067 sdev->no_write_same = 1; 1064 sdev->no_write_same = 1;
1068 1065
1069 /* Schedule policy is determined by ->qc_defer() callback and 1066 /* Schedule policy is determined by ->qc_defer() callback and
1070 * it needs to see every deferred qc. Set dev_blocked to 1 to 1067 * it needs to see every deferred qc. Set dev_blocked to 1 to
1071 * prevent SCSI midlayer from automatically deferring 1068 * prevent SCSI midlayer from automatically deferring
1072 * requests. 1069 * requests.
1073 */ 1070 */
1074 sdev->max_device_blocked = 1; 1071 sdev->max_device_blocked = 1;
1075 } 1072 }
1076 1073
1077 /** 1074 /**
1078 * atapi_drain_needed - Check whether data transfer may overflow 1075 * atapi_drain_needed - Check whether data transfer may overflow
1079 * @rq: request to be checked 1076 * @rq: request to be checked
1080 * 1077 *
1081 * ATAPI commands which transfer variable length data to host 1078 * ATAPI commands which transfer variable length data to host
1082 * might overflow due to application error or hardare bug. This 1079 * might overflow due to application error or hardare bug. This
1083 * function checks whether overflow should be drained and ignored 1080 * function checks whether overflow should be drained and ignored
1084 * for @request. 1081 * for @request.
1085 * 1082 *
1086 * LOCKING: 1083 * LOCKING:
1087 * None. 1084 * None.
1088 * 1085 *
1089 * RETURNS: 1086 * RETURNS:
1090 * 1 if ; otherwise, 0. 1087 * 1 if ; otherwise, 0.
1091 */ 1088 */
1092 static int atapi_drain_needed(struct request *rq) 1089 static int atapi_drain_needed(struct request *rq)
1093 { 1090 {
1094 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1091 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1095 return 0; 1092 return 0;
1096 1093
1097 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) 1094 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1098 return 0; 1095 return 0;
1099 1096
1100 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1097 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1101 } 1098 }
1102 1099
1103 static int ata_scsi_dev_config(struct scsi_device *sdev, 1100 static int ata_scsi_dev_config(struct scsi_device *sdev,
1104 struct ata_device *dev) 1101 struct ata_device *dev)
1105 { 1102 {
1106 struct request_queue *q = sdev->request_queue; 1103 struct request_queue *q = sdev->request_queue;
1107 1104
1108 if (!ata_id_has_unload(dev->id)) 1105 if (!ata_id_has_unload(dev->id))
1109 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1106 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1110 1107
1111 /* configure max sectors */ 1108 /* configure max sectors */
1112 blk_queue_max_hw_sectors(q, dev->max_sectors); 1109 blk_queue_max_hw_sectors(q, dev->max_sectors);
1113 1110
1114 if (dev->class == ATA_DEV_ATAPI) { 1111 if (dev->class == ATA_DEV_ATAPI) {
1115 void *buf; 1112 void *buf;
1116 1113
1117 sdev->sector_size = ATA_SECT_SIZE; 1114 sdev->sector_size = ATA_SECT_SIZE;
1118 1115
1119 /* set DMA padding */ 1116 /* set DMA padding */
1120 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1117 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1121 1118
1122 /* configure draining */ 1119 /* configure draining */
1123 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1120 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1124 if (!buf) { 1121 if (!buf) {
1125 ata_dev_err(dev, "drain buffer allocation failed\n"); 1122 ata_dev_err(dev, "drain buffer allocation failed\n");
1126 return -ENOMEM; 1123 return -ENOMEM;
1127 } 1124 }
1128 1125
1129 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1126 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1130 } else { 1127 } else {
1131 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1128 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1132 sdev->manage_start_stop = 1; 1129 sdev->manage_start_stop = 1;
1133 } 1130 }
1134 1131
1135 /* 1132 /*
1136 * ata_pio_sectors() expects buffer for each sector to not cross 1133 * ata_pio_sectors() expects buffer for each sector to not cross
1137 * page boundary. Enforce it by requiring buffers to be sector 1134 * page boundary. Enforce it by requiring buffers to be sector
1138 * aligned, which works iff sector_size is not larger than 1135 * aligned, which works iff sector_size is not larger than
1139 * PAGE_SIZE. ATAPI devices also need the alignment as 1136 * PAGE_SIZE. ATAPI devices also need the alignment as
1140 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1137 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1141 */ 1138 */
1142 if (sdev->sector_size > PAGE_SIZE) 1139 if (sdev->sector_size > PAGE_SIZE)
1143 ata_dev_warn(dev, 1140 ata_dev_warn(dev,
1144 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1141 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1145 sdev->sector_size); 1142 sdev->sector_size);
1146 1143
1147 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1144 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1148 1145
1149 if (dev->flags & ATA_DFLAG_AN) 1146 if (dev->flags & ATA_DFLAG_AN)
1150 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1147 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1151 1148
1152 if (dev->flags & ATA_DFLAG_NCQ) { 1149 if (dev->flags & ATA_DFLAG_NCQ) {
1153 int depth; 1150 int depth;
1154 1151
1155 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1152 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1156 depth = min(ATA_MAX_QUEUE - 1, depth); 1153 depth = min(ATA_MAX_QUEUE - 1, depth);
1157 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); 1154 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1158 } 1155 }
1159 1156
1160 blk_queue_flush_queueable(q, false); 1157 blk_queue_flush_queueable(q, false);
1161 1158
1162 dev->sdev = sdev; 1159 dev->sdev = sdev;
1163 return 0; 1160 return 0;
1164 } 1161 }
1165 1162
1166 /** 1163 /**
1167 * ata_scsi_slave_config - Set SCSI device attributes 1164 * ata_scsi_slave_config - Set SCSI device attributes
1168 * @sdev: SCSI device to examine 1165 * @sdev: SCSI device to examine
1169 * 1166 *
1170 * This is called before we actually start reading 1167 * This is called before we actually start reading
1171 * and writing to the device, to configure certain 1168 * and writing to the device, to configure certain
1172 * SCSI mid-layer behaviors. 1169 * SCSI mid-layer behaviors.
1173 * 1170 *
1174 * LOCKING: 1171 * LOCKING:
1175 * Defined by SCSI layer. We don't really care. 1172 * Defined by SCSI layer. We don't really care.
1176 */ 1173 */
1177 1174
1178 int ata_scsi_slave_config(struct scsi_device *sdev) 1175 int ata_scsi_slave_config(struct scsi_device *sdev)
1179 { 1176 {
1180 struct ata_port *ap = ata_shost_to_port(sdev->host); 1177 struct ata_port *ap = ata_shost_to_port(sdev->host);
1181 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1178 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1182 int rc = 0; 1179 int rc = 0;
1183 1180
1184 ata_scsi_sdev_config(sdev); 1181 ata_scsi_sdev_config(sdev);
1185 1182
1186 if (dev) 1183 if (dev)
1187 rc = ata_scsi_dev_config(sdev, dev); 1184 rc = ata_scsi_dev_config(sdev, dev);
1188 1185
1189 return rc; 1186 return rc;
1190 } 1187 }
1191 1188
1192 /** 1189 /**
1193 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1190 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1194 * @sdev: SCSI device to be destroyed 1191 * @sdev: SCSI device to be destroyed
1195 * 1192 *
1196 * @sdev is about to be destroyed for hot/warm unplugging. If 1193 * @sdev is about to be destroyed for hot/warm unplugging. If
1197 * this unplugging was initiated by libata as indicated by NULL 1194 * this unplugging was initiated by libata as indicated by NULL
1198 * dev->sdev, this function doesn't have to do anything. 1195 * dev->sdev, this function doesn't have to do anything.
1199 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1196 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1200 * Clear dev->sdev, schedule the device for ATA detach and invoke 1197 * Clear dev->sdev, schedule the device for ATA detach and invoke
1201 * EH. 1198 * EH.
1202 * 1199 *
1203 * LOCKING: 1200 * LOCKING:
1204 * Defined by SCSI layer. We don't really care. 1201 * Defined by SCSI layer. We don't really care.
1205 */ 1202 */
1206 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1203 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1207 { 1204 {
1208 struct ata_port *ap = ata_shost_to_port(sdev->host); 1205 struct ata_port *ap = ata_shost_to_port(sdev->host);
1209 struct request_queue *q = sdev->request_queue; 1206 struct request_queue *q = sdev->request_queue;
1210 unsigned long flags; 1207 unsigned long flags;
1211 struct ata_device *dev; 1208 struct ata_device *dev;
1212 1209
1213 if (!ap->ops->error_handler) 1210 if (!ap->ops->error_handler)
1214 return; 1211 return;
1215 1212
1216 spin_lock_irqsave(ap->lock, flags); 1213 spin_lock_irqsave(ap->lock, flags);
1217 dev = __ata_scsi_find_dev(ap, sdev); 1214 dev = __ata_scsi_find_dev(ap, sdev);
1218 if (dev && dev->sdev) { 1215 if (dev && dev->sdev) {
1219 /* SCSI device already in CANCEL state, no need to offline it */ 1216 /* SCSI device already in CANCEL state, no need to offline it */
1220 dev->sdev = NULL; 1217 dev->sdev = NULL;
1221 dev->flags |= ATA_DFLAG_DETACH; 1218 dev->flags |= ATA_DFLAG_DETACH;
1222 ata_port_schedule_eh(ap); 1219 ata_port_schedule_eh(ap);
1223 } 1220 }
1224 spin_unlock_irqrestore(ap->lock, flags); 1221 spin_unlock_irqrestore(ap->lock, flags);
1225 1222
1226 kfree(q->dma_drain_buffer); 1223 kfree(q->dma_drain_buffer);
1227 q->dma_drain_buffer = NULL; 1224 q->dma_drain_buffer = NULL;
1228 q->dma_drain_size = 0; 1225 q->dma_drain_size = 0;
1229 } 1226 }
1230 1227
1231 /** 1228 /**
1232 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1229 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1233 * @ap: ATA port to which the device change the queue depth 1230 * @ap: ATA port to which the device change the queue depth
1234 * @sdev: SCSI device to configure queue depth for 1231 * @sdev: SCSI device to configure queue depth for
1235 * @queue_depth: new queue depth 1232 * @queue_depth: new queue depth
1236 * @reason: calling context 1233 * @reason: calling context
1237 * 1234 *
1238 * libsas and libata have different approaches for associating a sdev to 1235 * libsas and libata have different approaches for associating a sdev to
1239 * its ata_port. 1236 * its ata_port.
1240 * 1237 *
1241 */ 1238 */
1242 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1239 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1243 int queue_depth, int reason) 1240 int queue_depth, int reason)
1244 { 1241 {
1245 struct ata_device *dev; 1242 struct ata_device *dev;
1246 unsigned long flags; 1243 unsigned long flags;
1247 1244
1248 if (reason != SCSI_QDEPTH_DEFAULT) 1245 if (reason != SCSI_QDEPTH_DEFAULT)
1249 return -EOPNOTSUPP; 1246 return -EOPNOTSUPP;
1250 1247
1251 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1248 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1252 return sdev->queue_depth; 1249 return sdev->queue_depth;
1253 1250
1254 dev = ata_scsi_find_dev(ap, sdev); 1251 dev = ata_scsi_find_dev(ap, sdev);
1255 if (!dev || !ata_dev_enabled(dev)) 1252 if (!dev || !ata_dev_enabled(dev))
1256 return sdev->queue_depth; 1253 return sdev->queue_depth;
1257 1254
1258 /* NCQ enabled? */ 1255 /* NCQ enabled? */
1259 spin_lock_irqsave(ap->lock, flags); 1256 spin_lock_irqsave(ap->lock, flags);
1260 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1257 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1261 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1258 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1262 dev->flags |= ATA_DFLAG_NCQ_OFF; 1259 dev->flags |= ATA_DFLAG_NCQ_OFF;
1263 queue_depth = 1; 1260 queue_depth = 1;
1264 } 1261 }
1265 spin_unlock_irqrestore(ap->lock, flags); 1262 spin_unlock_irqrestore(ap->lock, flags);
1266 1263
1267 /* limit and apply queue depth */ 1264 /* limit and apply queue depth */
1268 queue_depth = min(queue_depth, sdev->host->can_queue); 1265 queue_depth = min(queue_depth, sdev->host->can_queue);
1269 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1266 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1270 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1267 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1271 1268
1272 if (sdev->queue_depth == queue_depth) 1269 if (sdev->queue_depth == queue_depth)
1273 return -EINVAL; 1270 return -EINVAL;
1274 1271
1275 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); 1272 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1276 return queue_depth; 1273 return queue_depth;
1277 } 1274 }
1278 1275
1279 /** 1276 /**
1280 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1277 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1281 * @sdev: SCSI device to configure queue depth for 1278 * @sdev: SCSI device to configure queue depth for
1282 * @queue_depth: new queue depth 1279 * @queue_depth: new queue depth
1283 * @reason: calling context 1280 * @reason: calling context
1284 * 1281 *
1285 * This is libata standard hostt->change_queue_depth callback. 1282 * This is libata standard hostt->change_queue_depth callback.
1286 * SCSI will call into this callback when user tries to set queue 1283 * SCSI will call into this callback when user tries to set queue
1287 * depth via sysfs. 1284 * depth via sysfs.
1288 * 1285 *
1289 * LOCKING: 1286 * LOCKING:
1290 * SCSI layer (we don't care) 1287 * SCSI layer (we don't care)
1291 * 1288 *
1292 * RETURNS: 1289 * RETURNS:
1293 * Newly configured queue depth. 1290 * Newly configured queue depth.
1294 */ 1291 */
1295 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, 1292 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1296 int reason) 1293 int reason)
1297 { 1294 {
1298 struct ata_port *ap = ata_shost_to_port(sdev->host); 1295 struct ata_port *ap = ata_shost_to_port(sdev->host);
1299 1296
1300 return __ata_change_queue_depth(ap, sdev, queue_depth, reason); 1297 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1301 } 1298 }
1302 1299
1303 /** 1300 /**
1304 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1301 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1305 * @qc: Storage for translated ATA taskfile 1302 * @qc: Storage for translated ATA taskfile
1306 * 1303 *
1307 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1304 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1308 * (to start). Perhaps these commands should be preceded by 1305 * (to start). Perhaps these commands should be preceded by
1309 * CHECK POWER MODE to see what power mode the device is already in. 1306 * CHECK POWER MODE to see what power mode the device is already in.
1310 * [See SAT revision 5 at www.t10.org] 1307 * [See SAT revision 5 at www.t10.org]
1311 * 1308 *
1312 * LOCKING: 1309 * LOCKING:
1313 * spin_lock_irqsave(host lock) 1310 * spin_lock_irqsave(host lock)
1314 * 1311 *
1315 * RETURNS: 1312 * RETURNS:
1316 * Zero on success, non-zero on error. 1313 * Zero on success, non-zero on error.
1317 */ 1314 */
1318 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1315 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1319 { 1316 {
1320 struct scsi_cmnd *scmd = qc->scsicmd; 1317 struct scsi_cmnd *scmd = qc->scsicmd;
1321 struct ata_taskfile *tf = &qc->tf; 1318 struct ata_taskfile *tf = &qc->tf;
1322 const u8 *cdb = scmd->cmnd; 1319 const u8 *cdb = scmd->cmnd;
1323 1320
1324 if (scmd->cmd_len < 5) 1321 if (scmd->cmd_len < 5)
1325 goto invalid_fld; 1322 goto invalid_fld;
1326 1323
1327 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1324 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1328 tf->protocol = ATA_PROT_NODATA; 1325 tf->protocol = ATA_PROT_NODATA;
1329 if (cdb[1] & 0x1) { 1326 if (cdb[1] & 0x1) {
1330 ; /* ignore IMMED bit, violates sat-r05 */ 1327 ; /* ignore IMMED bit, violates sat-r05 */
1331 } 1328 }
1332 if (cdb[4] & 0x2) 1329 if (cdb[4] & 0x2)
1333 goto invalid_fld; /* LOEJ bit set not supported */ 1330 goto invalid_fld; /* LOEJ bit set not supported */
1334 if (((cdb[4] >> 4) & 0xf) != 0) 1331 if (((cdb[4] >> 4) & 0xf) != 0)
1335 goto invalid_fld; /* power conditions not supported */ 1332 goto invalid_fld; /* power conditions not supported */
1336 1333
1337 if (cdb[4] & 0x1) { 1334 if (cdb[4] & 0x1) {
1338 tf->nsect = 1; /* 1 sector, lba=0 */ 1335 tf->nsect = 1; /* 1 sector, lba=0 */
1339 1336
1340 if (qc->dev->flags & ATA_DFLAG_LBA) { 1337 if (qc->dev->flags & ATA_DFLAG_LBA) {
1341 tf->flags |= ATA_TFLAG_LBA; 1338 tf->flags |= ATA_TFLAG_LBA;
1342 1339
1343 tf->lbah = 0x0; 1340 tf->lbah = 0x0;
1344 tf->lbam = 0x0; 1341 tf->lbam = 0x0;
1345 tf->lbal = 0x0; 1342 tf->lbal = 0x0;
1346 tf->device |= ATA_LBA; 1343 tf->device |= ATA_LBA;
1347 } else { 1344 } else {
1348 /* CHS */ 1345 /* CHS */
1349 tf->lbal = 0x1; /* sect */ 1346 tf->lbal = 0x1; /* sect */
1350 tf->lbam = 0x0; /* cyl low */ 1347 tf->lbam = 0x0; /* cyl low */
1351 tf->lbah = 0x0; /* cyl high */ 1348 tf->lbah = 0x0; /* cyl high */
1352 } 1349 }
1353 1350
1354 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1351 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1355 } else { 1352 } else {
1356 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1353 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1357 * or S5) causing some drives to spin up and down again. 1354 * or S5) causing some drives to spin up and down again.
1358 */ 1355 */
1359 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1356 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1360 system_state == SYSTEM_POWER_OFF) 1357 system_state == SYSTEM_POWER_OFF)
1361 goto skip; 1358 goto skip;
1362 1359
1363 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1360 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1364 system_entering_hibernation()) 1361 system_entering_hibernation())
1365 goto skip; 1362 goto skip;
1366 1363
1367 /* Issue ATA STANDBY IMMEDIATE command */ 1364 /* Issue ATA STANDBY IMMEDIATE command */
1368 tf->command = ATA_CMD_STANDBYNOW1; 1365 tf->command = ATA_CMD_STANDBYNOW1;
1369 } 1366 }
1370 1367
1371 /* 1368 /*
1372 * Standby and Idle condition timers could be implemented but that 1369 * Standby and Idle condition timers could be implemented but that
1373 * would require libata to implement the Power condition mode page 1370 * would require libata to implement the Power condition mode page
1374 * and allow the user to change it. Changing mode pages requires 1371 * and allow the user to change it. Changing mode pages requires
1375 * MODE SELECT to be implemented. 1372 * MODE SELECT to be implemented.
1376 */ 1373 */
1377 1374
1378 return 0; 1375 return 0;
1379 1376
1380 invalid_fld: 1377 invalid_fld:
1381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1378 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1382 /* "Invalid field in cbd" */ 1379 /* "Invalid field in cbd" */
1383 return 1; 1380 return 1;
1384 skip: 1381 skip:
1385 scmd->result = SAM_STAT_GOOD; 1382 scmd->result = SAM_STAT_GOOD;
1386 return 1; 1383 return 1;
1387 } 1384 }
1388 1385
1389 1386
1390 /** 1387 /**
1391 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1388 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1392 * @qc: Storage for translated ATA taskfile 1389 * @qc: Storage for translated ATA taskfile
1393 * 1390 *
1394 * Sets up an ATA taskfile to issue FLUSH CACHE or 1391 * Sets up an ATA taskfile to issue FLUSH CACHE or
1395 * FLUSH CACHE EXT. 1392 * FLUSH CACHE EXT.
1396 * 1393 *
1397 * LOCKING: 1394 * LOCKING:
1398 * spin_lock_irqsave(host lock) 1395 * spin_lock_irqsave(host lock)
1399 * 1396 *
1400 * RETURNS: 1397 * RETURNS:
1401 * Zero on success, non-zero on error. 1398 * Zero on success, non-zero on error.
1402 */ 1399 */
1403 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1400 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1404 { 1401 {
1405 struct ata_taskfile *tf = &qc->tf; 1402 struct ata_taskfile *tf = &qc->tf;
1406 1403
1407 tf->flags |= ATA_TFLAG_DEVICE; 1404 tf->flags |= ATA_TFLAG_DEVICE;
1408 tf->protocol = ATA_PROT_NODATA; 1405 tf->protocol = ATA_PROT_NODATA;
1409 1406
1410 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1407 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1411 tf->command = ATA_CMD_FLUSH_EXT; 1408 tf->command = ATA_CMD_FLUSH_EXT;
1412 else 1409 else
1413 tf->command = ATA_CMD_FLUSH; 1410 tf->command = ATA_CMD_FLUSH;
1414 1411
1415 /* flush is critical for IO integrity, consider it an IO command */ 1412 /* flush is critical for IO integrity, consider it an IO command */
1416 qc->flags |= ATA_QCFLAG_IO; 1413 qc->flags |= ATA_QCFLAG_IO;
1417 1414
1418 return 0; 1415 return 0;
1419 } 1416 }
1420 1417
1421 /** 1418 /**
1422 * scsi_6_lba_len - Get LBA and transfer length 1419 * scsi_6_lba_len - Get LBA and transfer length
1423 * @cdb: SCSI command to translate 1420 * @cdb: SCSI command to translate
1424 * 1421 *
1425 * Calculate LBA and transfer length for 6-byte commands. 1422 * Calculate LBA and transfer length for 6-byte commands.
1426 * 1423 *
1427 * RETURNS: 1424 * RETURNS:
1428 * @plba: the LBA 1425 * @plba: the LBA
1429 * @plen: the transfer length 1426 * @plen: the transfer length
1430 */ 1427 */
1431 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1428 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1432 { 1429 {
1433 u64 lba = 0; 1430 u64 lba = 0;
1434 u32 len; 1431 u32 len;
1435 1432
1436 VPRINTK("six-byte command\n"); 1433 VPRINTK("six-byte command\n");
1437 1434
1438 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1435 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1439 lba |= ((u64)cdb[2]) << 8; 1436 lba |= ((u64)cdb[2]) << 8;
1440 lba |= ((u64)cdb[3]); 1437 lba |= ((u64)cdb[3]);
1441 1438
1442 len = cdb[4]; 1439 len = cdb[4];
1443 1440
1444 *plba = lba; 1441 *plba = lba;
1445 *plen = len; 1442 *plen = len;
1446 } 1443 }
1447 1444
1448 /** 1445 /**
1449 * scsi_10_lba_len - Get LBA and transfer length 1446 * scsi_10_lba_len - Get LBA and transfer length
1450 * @cdb: SCSI command to translate 1447 * @cdb: SCSI command to translate
1451 * 1448 *
1452 * Calculate LBA and transfer length for 10-byte commands. 1449 * Calculate LBA and transfer length for 10-byte commands.
1453 * 1450 *
1454 * RETURNS: 1451 * RETURNS:
1455 * @plba: the LBA 1452 * @plba: the LBA
1456 * @plen: the transfer length 1453 * @plen: the transfer length
1457 */ 1454 */
1458 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1455 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1459 { 1456 {
1460 u64 lba = 0; 1457 u64 lba = 0;
1461 u32 len = 0; 1458 u32 len = 0;
1462 1459
1463 VPRINTK("ten-byte command\n"); 1460 VPRINTK("ten-byte command\n");
1464 1461
1465 lba |= ((u64)cdb[2]) << 24; 1462 lba |= ((u64)cdb[2]) << 24;
1466 lba |= ((u64)cdb[3]) << 16; 1463 lba |= ((u64)cdb[3]) << 16;
1467 lba |= ((u64)cdb[4]) << 8; 1464 lba |= ((u64)cdb[4]) << 8;
1468 lba |= ((u64)cdb[5]); 1465 lba |= ((u64)cdb[5]);
1469 1466
1470 len |= ((u32)cdb[7]) << 8; 1467 len |= ((u32)cdb[7]) << 8;
1471 len |= ((u32)cdb[8]); 1468 len |= ((u32)cdb[8]);
1472 1469
1473 *plba = lba; 1470 *plba = lba;
1474 *plen = len; 1471 *plen = len;
1475 } 1472 }
1476 1473
1477 /** 1474 /**
1478 * scsi_16_lba_len - Get LBA and transfer length 1475 * scsi_16_lba_len - Get LBA and transfer length
1479 * @cdb: SCSI command to translate 1476 * @cdb: SCSI command to translate
1480 * 1477 *
1481 * Calculate LBA and transfer length for 16-byte commands. 1478 * Calculate LBA and transfer length for 16-byte commands.
1482 * 1479 *
1483 * RETURNS: 1480 * RETURNS:
1484 * @plba: the LBA 1481 * @plba: the LBA
1485 * @plen: the transfer length 1482 * @plen: the transfer length
1486 */ 1483 */
1487 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1484 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1488 { 1485 {
1489 u64 lba = 0; 1486 u64 lba = 0;
1490 u32 len = 0; 1487 u32 len = 0;
1491 1488
1492 VPRINTK("sixteen-byte command\n"); 1489 VPRINTK("sixteen-byte command\n");
1493 1490
1494 lba |= ((u64)cdb[2]) << 56; 1491 lba |= ((u64)cdb[2]) << 56;
1495 lba |= ((u64)cdb[3]) << 48; 1492 lba |= ((u64)cdb[3]) << 48;
1496 lba |= ((u64)cdb[4]) << 40; 1493 lba |= ((u64)cdb[4]) << 40;
1497 lba |= ((u64)cdb[5]) << 32; 1494 lba |= ((u64)cdb[5]) << 32;
1498 lba |= ((u64)cdb[6]) << 24; 1495 lba |= ((u64)cdb[6]) << 24;
1499 lba |= ((u64)cdb[7]) << 16; 1496 lba |= ((u64)cdb[7]) << 16;
1500 lba |= ((u64)cdb[8]) << 8; 1497 lba |= ((u64)cdb[8]) << 8;
1501 lba |= ((u64)cdb[9]); 1498 lba |= ((u64)cdb[9]);
1502 1499
1503 len |= ((u32)cdb[10]) << 24; 1500 len |= ((u32)cdb[10]) << 24;
1504 len |= ((u32)cdb[11]) << 16; 1501 len |= ((u32)cdb[11]) << 16;
1505 len |= ((u32)cdb[12]) << 8; 1502 len |= ((u32)cdb[12]) << 8;
1506 len |= ((u32)cdb[13]); 1503 len |= ((u32)cdb[13]);
1507 1504
1508 *plba = lba; 1505 *plba = lba;
1509 *plen = len; 1506 *plen = len;
1510 } 1507 }
1511 1508
1512 /** 1509 /**
1513 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1510 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1514 * @qc: Storage for translated ATA taskfile 1511 * @qc: Storage for translated ATA taskfile
1515 * 1512 *
1516 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1513 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1517 * 1514 *
1518 * LOCKING: 1515 * LOCKING:
1519 * spin_lock_irqsave(host lock) 1516 * spin_lock_irqsave(host lock)
1520 * 1517 *
1521 * RETURNS: 1518 * RETURNS:
1522 * Zero on success, non-zero on error. 1519 * Zero on success, non-zero on error.
1523 */ 1520 */
1524 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1521 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1525 { 1522 {
1526 struct scsi_cmnd *scmd = qc->scsicmd; 1523 struct scsi_cmnd *scmd = qc->scsicmd;
1527 struct ata_taskfile *tf = &qc->tf; 1524 struct ata_taskfile *tf = &qc->tf;
1528 struct ata_device *dev = qc->dev; 1525 struct ata_device *dev = qc->dev;
1529 u64 dev_sectors = qc->dev->n_sectors; 1526 u64 dev_sectors = qc->dev->n_sectors;
1530 const u8 *cdb = scmd->cmnd; 1527 const u8 *cdb = scmd->cmnd;
1531 u64 block; 1528 u64 block;
1532 u32 n_block; 1529 u32 n_block;
1533 1530
1534 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1531 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1535 tf->protocol = ATA_PROT_NODATA; 1532 tf->protocol = ATA_PROT_NODATA;
1536 1533
1537 if (cdb[0] == VERIFY) { 1534 if (cdb[0] == VERIFY) {
1538 if (scmd->cmd_len < 10) 1535 if (scmd->cmd_len < 10)
1539 goto invalid_fld; 1536 goto invalid_fld;
1540 scsi_10_lba_len(cdb, &block, &n_block); 1537 scsi_10_lba_len(cdb, &block, &n_block);
1541 } else if (cdb[0] == VERIFY_16) { 1538 } else if (cdb[0] == VERIFY_16) {
1542 if (scmd->cmd_len < 16) 1539 if (scmd->cmd_len < 16)
1543 goto invalid_fld; 1540 goto invalid_fld;
1544 scsi_16_lba_len(cdb, &block, &n_block); 1541 scsi_16_lba_len(cdb, &block, &n_block);
1545 } else 1542 } else
1546 goto invalid_fld; 1543 goto invalid_fld;
1547 1544
1548 if (!n_block) 1545 if (!n_block)
1549 goto nothing_to_do; 1546 goto nothing_to_do;
1550 if (block >= dev_sectors) 1547 if (block >= dev_sectors)
1551 goto out_of_range; 1548 goto out_of_range;
1552 if ((block + n_block) > dev_sectors) 1549 if ((block + n_block) > dev_sectors)
1553 goto out_of_range; 1550 goto out_of_range;
1554 1551
1555 if (dev->flags & ATA_DFLAG_LBA) { 1552 if (dev->flags & ATA_DFLAG_LBA) {
1556 tf->flags |= ATA_TFLAG_LBA; 1553 tf->flags |= ATA_TFLAG_LBA;
1557 1554
1558 if (lba_28_ok(block, n_block)) { 1555 if (lba_28_ok(block, n_block)) {
1559 /* use LBA28 */ 1556 /* use LBA28 */
1560 tf->command = ATA_CMD_VERIFY; 1557 tf->command = ATA_CMD_VERIFY;
1561 tf->device |= (block >> 24) & 0xf; 1558 tf->device |= (block >> 24) & 0xf;
1562 } else if (lba_48_ok(block, n_block)) { 1559 } else if (lba_48_ok(block, n_block)) {
1563 if (!(dev->flags & ATA_DFLAG_LBA48)) 1560 if (!(dev->flags & ATA_DFLAG_LBA48))
1564 goto out_of_range; 1561 goto out_of_range;
1565 1562
1566 /* use LBA48 */ 1563 /* use LBA48 */
1567 tf->flags |= ATA_TFLAG_LBA48; 1564 tf->flags |= ATA_TFLAG_LBA48;
1568 tf->command = ATA_CMD_VERIFY_EXT; 1565 tf->command = ATA_CMD_VERIFY_EXT;
1569 1566
1570 tf->hob_nsect = (n_block >> 8) & 0xff; 1567 tf->hob_nsect = (n_block >> 8) & 0xff;
1571 1568
1572 tf->hob_lbah = (block >> 40) & 0xff; 1569 tf->hob_lbah = (block >> 40) & 0xff;
1573 tf->hob_lbam = (block >> 32) & 0xff; 1570 tf->hob_lbam = (block >> 32) & 0xff;
1574 tf->hob_lbal = (block >> 24) & 0xff; 1571 tf->hob_lbal = (block >> 24) & 0xff;
1575 } else 1572 } else
1576 /* request too large even for LBA48 */ 1573 /* request too large even for LBA48 */
1577 goto out_of_range; 1574 goto out_of_range;
1578 1575
1579 tf->nsect = n_block & 0xff; 1576 tf->nsect = n_block & 0xff;
1580 1577
1581 tf->lbah = (block >> 16) & 0xff; 1578 tf->lbah = (block >> 16) & 0xff;
1582 tf->lbam = (block >> 8) & 0xff; 1579 tf->lbam = (block >> 8) & 0xff;
1583 tf->lbal = block & 0xff; 1580 tf->lbal = block & 0xff;
1584 1581
1585 tf->device |= ATA_LBA; 1582 tf->device |= ATA_LBA;
1586 } else { 1583 } else {
1587 /* CHS */ 1584 /* CHS */
1588 u32 sect, head, cyl, track; 1585 u32 sect, head, cyl, track;
1589 1586
1590 if (!lba_28_ok(block, n_block)) 1587 if (!lba_28_ok(block, n_block))
1591 goto out_of_range; 1588 goto out_of_range;
1592 1589
1593 /* Convert LBA to CHS */ 1590 /* Convert LBA to CHS */
1594 track = (u32)block / dev->sectors; 1591 track = (u32)block / dev->sectors;
1595 cyl = track / dev->heads; 1592 cyl = track / dev->heads;
1596 head = track % dev->heads; 1593 head = track % dev->heads;
1597 sect = (u32)block % dev->sectors + 1; 1594 sect = (u32)block % dev->sectors + 1;
1598 1595
1599 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1596 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1600 (u32)block, track, cyl, head, sect); 1597 (u32)block, track, cyl, head, sect);
1601 1598
1602 /* Check whether the converted CHS can fit. 1599 /* Check whether the converted CHS can fit.
1603 Cylinder: 0-65535 1600 Cylinder: 0-65535
1604 Head: 0-15 1601 Head: 0-15
1605 Sector: 1-255*/ 1602 Sector: 1-255*/
1606 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1603 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1607 goto out_of_range; 1604 goto out_of_range;
1608 1605
1609 tf->command = ATA_CMD_VERIFY; 1606 tf->command = ATA_CMD_VERIFY;
1610 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1607 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1611 tf->lbal = sect; 1608 tf->lbal = sect;
1612 tf->lbam = cyl; 1609 tf->lbam = cyl;
1613 tf->lbah = cyl >> 8; 1610 tf->lbah = cyl >> 8;
1614 tf->device |= head; 1611 tf->device |= head;
1615 } 1612 }
1616 1613
1617 return 0; 1614 return 0;
1618 1615
1619 invalid_fld: 1616 invalid_fld:
1620 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1617 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1621 /* "Invalid field in cbd" */ 1618 /* "Invalid field in cbd" */
1622 return 1; 1619 return 1;
1623 1620
1624 out_of_range: 1621 out_of_range:
1625 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1622 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1626 /* "Logical Block Address out of range" */ 1623 /* "Logical Block Address out of range" */
1627 return 1; 1624 return 1;
1628 1625
1629 nothing_to_do: 1626 nothing_to_do:
1630 scmd->result = SAM_STAT_GOOD; 1627 scmd->result = SAM_STAT_GOOD;
1631 return 1; 1628 return 1;
1632 } 1629 }
1633 1630
1634 /** 1631 /**
1635 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1632 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1636 * @qc: Storage for translated ATA taskfile 1633 * @qc: Storage for translated ATA taskfile
1637 * 1634 *
1638 * Converts any of six SCSI read/write commands into the 1635 * Converts any of six SCSI read/write commands into the
1639 * ATA counterpart, including starting sector (LBA), 1636 * ATA counterpart, including starting sector (LBA),
1640 * sector count, and taking into account the device's LBA48 1637 * sector count, and taking into account the device's LBA48
1641 * support. 1638 * support.
1642 * 1639 *
1643 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1640 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1644 * %WRITE_16 are currently supported. 1641 * %WRITE_16 are currently supported.
1645 * 1642 *
1646 * LOCKING: 1643 * LOCKING:
1647 * spin_lock_irqsave(host lock) 1644 * spin_lock_irqsave(host lock)
1648 * 1645 *
1649 * RETURNS: 1646 * RETURNS:
1650 * Zero on success, non-zero on error. 1647 * Zero on success, non-zero on error.
1651 */ 1648 */
1652 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1649 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1653 { 1650 {
1654 struct scsi_cmnd *scmd = qc->scsicmd; 1651 struct scsi_cmnd *scmd = qc->scsicmd;
1655 const u8 *cdb = scmd->cmnd; 1652 const u8 *cdb = scmd->cmnd;
1656 unsigned int tf_flags = 0; 1653 unsigned int tf_flags = 0;
1657 u64 block; 1654 u64 block;
1658 u32 n_block; 1655 u32 n_block;
1659 int rc; 1656 int rc;
1660 1657
1661 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1658 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1662 tf_flags |= ATA_TFLAG_WRITE; 1659 tf_flags |= ATA_TFLAG_WRITE;
1663 1660
1664 /* Calculate the SCSI LBA, transfer length and FUA. */ 1661 /* Calculate the SCSI LBA, transfer length and FUA. */
1665 switch (cdb[0]) { 1662 switch (cdb[0]) {
1666 case READ_10: 1663 case READ_10:
1667 case WRITE_10: 1664 case WRITE_10:
1668 if (unlikely(scmd->cmd_len < 10)) 1665 if (unlikely(scmd->cmd_len < 10))
1669 goto invalid_fld; 1666 goto invalid_fld;
1670 scsi_10_lba_len(cdb, &block, &n_block); 1667 scsi_10_lba_len(cdb, &block, &n_block);
1671 if (cdb[1] & (1 << 3)) 1668 if (cdb[1] & (1 << 3))
1672 tf_flags |= ATA_TFLAG_FUA; 1669 tf_flags |= ATA_TFLAG_FUA;
1673 break; 1670 break;
1674 case READ_6: 1671 case READ_6:
1675 case WRITE_6: 1672 case WRITE_6:
1676 if (unlikely(scmd->cmd_len < 6)) 1673 if (unlikely(scmd->cmd_len < 6))
1677 goto invalid_fld; 1674 goto invalid_fld;
1678 scsi_6_lba_len(cdb, &block, &n_block); 1675 scsi_6_lba_len(cdb, &block, &n_block);
1679 1676
1680 /* for 6-byte r/w commands, transfer length 0 1677 /* for 6-byte r/w commands, transfer length 0
1681 * means 256 blocks of data, not 0 block. 1678 * means 256 blocks of data, not 0 block.
1682 */ 1679 */
1683 if (!n_block) 1680 if (!n_block)
1684 n_block = 256; 1681 n_block = 256;
1685 break; 1682 break;
1686 case READ_16: 1683 case READ_16:
1687 case WRITE_16: 1684 case WRITE_16:
1688 if (unlikely(scmd->cmd_len < 16)) 1685 if (unlikely(scmd->cmd_len < 16))
1689 goto invalid_fld; 1686 goto invalid_fld;
1690 scsi_16_lba_len(cdb, &block, &n_block); 1687 scsi_16_lba_len(cdb, &block, &n_block);
1691 if (cdb[1] & (1 << 3)) 1688 if (cdb[1] & (1 << 3))
1692 tf_flags |= ATA_TFLAG_FUA; 1689 tf_flags |= ATA_TFLAG_FUA;
1693 break; 1690 break;
1694 default: 1691 default:
1695 DPRINTK("no-byte command\n"); 1692 DPRINTK("no-byte command\n");
1696 goto invalid_fld; 1693 goto invalid_fld;
1697 } 1694 }
1698 1695
1699 /* Check and compose ATA command */ 1696 /* Check and compose ATA command */
1700 if (!n_block) 1697 if (!n_block)
1701 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1698 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1702 * length 0 means transfer 0 block of data. 1699 * length 0 means transfer 0 block of data.
1703 * However, for ATA R/W commands, sector count 0 means 1700 * However, for ATA R/W commands, sector count 0 means
1704 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1701 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1705 * 1702 *
1706 * WARNING: one or two older ATA drives treat 0 as 0... 1703 * WARNING: one or two older ATA drives treat 0 as 0...
1707 */ 1704 */
1708 goto nothing_to_do; 1705 goto nothing_to_do;
1709 1706
1710 qc->flags |= ATA_QCFLAG_IO; 1707 qc->flags |= ATA_QCFLAG_IO;
1711 qc->nbytes = n_block * scmd->device->sector_size; 1708 qc->nbytes = n_block * scmd->device->sector_size;
1712 1709
1713 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1710 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1714 qc->tag); 1711 qc->tag);
1715 if (likely(rc == 0)) 1712 if (likely(rc == 0))
1716 return 0; 1713 return 0;
1717 1714
1718 if (rc == -ERANGE) 1715 if (rc == -ERANGE)
1719 goto out_of_range; 1716 goto out_of_range;
1720 /* treat all other errors as -EINVAL, fall through */ 1717 /* treat all other errors as -EINVAL, fall through */
1721 invalid_fld: 1718 invalid_fld:
1722 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1719 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1723 /* "Invalid field in cbd" */ 1720 /* "Invalid field in cbd" */
1724 return 1; 1721 return 1;
1725 1722
1726 out_of_range: 1723 out_of_range:
1727 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1724 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1728 /* "Logical Block Address out of range" */ 1725 /* "Logical Block Address out of range" */
1729 return 1; 1726 return 1;
1730 1727
1731 nothing_to_do: 1728 nothing_to_do:
1732 scmd->result = SAM_STAT_GOOD; 1729 scmd->result = SAM_STAT_GOOD;
1733 return 1; 1730 return 1;
1734 } 1731 }
1735 1732
1736 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1733 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1737 { 1734 {
1738 struct ata_port *ap = qc->ap; 1735 struct ata_port *ap = qc->ap;
1739 struct scsi_cmnd *cmd = qc->scsicmd; 1736 struct scsi_cmnd *cmd = qc->scsicmd;
1740 u8 *cdb = cmd->cmnd; 1737 u8 *cdb = cmd->cmnd;
1741 int need_sense = (qc->err_mask != 0); 1738 int need_sense = (qc->err_mask != 0);
1742 1739
1743 /* For ATA pass thru (SAT) commands, generate a sense block if 1740 /* For ATA pass thru (SAT) commands, generate a sense block if
1744 * user mandated it or if there's an error. Note that if we 1741 * user mandated it or if there's an error. Note that if we
1745 * generate because the user forced us to [CK_COND =1], a check 1742 * generate because the user forced us to [CK_COND =1], a check
1746 * condition is generated and the ATA register values are returned 1743 * condition is generated and the ATA register values are returned
1747 * whether the command completed successfully or not. If there 1744 * whether the command completed successfully or not. If there
1748 * was no error, we use the following sense data: 1745 * was no error, we use the following sense data:
1749 * sk = RECOVERED ERROR 1746 * sk = RECOVERED ERROR
1750 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1747 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1751 */ 1748 */
1752 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1749 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1753 ((cdb[2] & 0x20) || need_sense)) { 1750 ((cdb[2] & 0x20) || need_sense)) {
1754 ata_gen_passthru_sense(qc); 1751 ata_gen_passthru_sense(qc);
1755 } else { 1752 } else {
1756 if (!need_sense) { 1753 if (!need_sense) {
1757 cmd->result = SAM_STAT_GOOD; 1754 cmd->result = SAM_STAT_GOOD;
1758 } else { 1755 } else {
1759 /* TODO: decide which descriptor format to use 1756 /* TODO: decide which descriptor format to use
1760 * for 48b LBA devices and call that here 1757 * for 48b LBA devices and call that here
1761 * instead of the fixed desc, which is only 1758 * instead of the fixed desc, which is only
1762 * good for smaller LBA (and maybe CHS?) 1759 * good for smaller LBA (and maybe CHS?)
1763 * devices. 1760 * devices.
1764 */ 1761 */
1765 ata_gen_ata_sense(qc); 1762 ata_gen_ata_sense(qc);
1766 } 1763 }
1767 } 1764 }
1768 1765
1769 if (need_sense && !ap->ops->error_handler) 1766 if (need_sense && !ap->ops->error_handler)
1770 ata_dump_status(ap->print_id, &qc->result_tf); 1767 ata_dump_status(ap->print_id, &qc->result_tf);
1771 1768
1772 qc->scsidone(cmd); 1769 qc->scsidone(cmd);
1773 1770
1774 ata_qc_free(qc); 1771 ata_qc_free(qc);
1775 } 1772 }
1776 1773
1777 /** 1774 /**
1778 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1775 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1779 * @dev: ATA device to which the command is addressed 1776 * @dev: ATA device to which the command is addressed
1780 * @cmd: SCSI command to execute 1777 * @cmd: SCSI command to execute
1781 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1778 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1782 * 1779 *
1783 * Our ->queuecommand() function has decided that the SCSI 1780 * Our ->queuecommand() function has decided that the SCSI
1784 * command issued can be directly translated into an ATA 1781 * command issued can be directly translated into an ATA
1785 * command, rather than handled internally. 1782 * command, rather than handled internally.
1786 * 1783 *
1787 * This function sets up an ata_queued_cmd structure for the 1784 * This function sets up an ata_queued_cmd structure for the
1788 * SCSI command, and sends that ata_queued_cmd to the hardware. 1785 * SCSI command, and sends that ata_queued_cmd to the hardware.
1789 * 1786 *
1790 * The xlat_func argument (actor) returns 0 if ready to execute 1787 * The xlat_func argument (actor) returns 0 if ready to execute
1791 * ATA command, else 1 to finish translation. If 1 is returned 1788 * ATA command, else 1 to finish translation. If 1 is returned
1792 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1789 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1793 * to be set reflecting an error condition or clean (early) 1790 * to be set reflecting an error condition or clean (early)
1794 * termination. 1791 * termination.
1795 * 1792 *
1796 * LOCKING: 1793 * LOCKING:
1797 * spin_lock_irqsave(host lock) 1794 * spin_lock_irqsave(host lock)
1798 * 1795 *
1799 * RETURNS: 1796 * RETURNS:
1800 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1797 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1801 * needs to be deferred. 1798 * needs to be deferred.
1802 */ 1799 */
1803 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1800 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1804 ata_xlat_func_t xlat_func) 1801 ata_xlat_func_t xlat_func)
1805 { 1802 {
1806 struct ata_port *ap = dev->link->ap; 1803 struct ata_port *ap = dev->link->ap;
1807 struct ata_queued_cmd *qc; 1804 struct ata_queued_cmd *qc;
1808 int rc; 1805 int rc;
1809 1806
1810 VPRINTK("ENTER\n"); 1807 VPRINTK("ENTER\n");
1811 1808
1812 qc = ata_scsi_qc_new(dev, cmd); 1809 qc = ata_scsi_qc_new(dev, cmd);
1813 if (!qc) 1810 if (!qc)
1814 goto err_mem; 1811 goto err_mem;
1815 1812
1816 /* data is present; dma-map it */ 1813 /* data is present; dma-map it */
1817 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1814 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1818 cmd->sc_data_direction == DMA_TO_DEVICE) { 1815 cmd->sc_data_direction == DMA_TO_DEVICE) {
1819 if (unlikely(scsi_bufflen(cmd) < 1)) { 1816 if (unlikely(scsi_bufflen(cmd) < 1)) {
1820 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1817 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1821 goto err_did; 1818 goto err_did;
1822 } 1819 }
1823 1820
1824 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1821 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1825 1822
1826 qc->dma_dir = cmd->sc_data_direction; 1823 qc->dma_dir = cmd->sc_data_direction;
1827 } 1824 }
1828 1825
1829 qc->complete_fn = ata_scsi_qc_complete; 1826 qc->complete_fn = ata_scsi_qc_complete;
1830 1827
1831 if (xlat_func(qc)) 1828 if (xlat_func(qc))
1832 goto early_finish; 1829 goto early_finish;
1833 1830
1834 if (ap->ops->qc_defer) { 1831 if (ap->ops->qc_defer) {
1835 if ((rc = ap->ops->qc_defer(qc))) 1832 if ((rc = ap->ops->qc_defer(qc)))
1836 goto defer; 1833 goto defer;
1837 } 1834 }
1838 1835
1839 /* select device, send command to hardware */ 1836 /* select device, send command to hardware */
1840 ata_qc_issue(qc); 1837 ata_qc_issue(qc);
1841 1838
1842 VPRINTK("EXIT\n"); 1839 VPRINTK("EXIT\n");
1843 return 0; 1840 return 0;
1844 1841
1845 early_finish: 1842 early_finish:
1846 ata_qc_free(qc); 1843 ata_qc_free(qc);
1847 cmd->scsi_done(cmd); 1844 cmd->scsi_done(cmd);
1848 DPRINTK("EXIT - early finish (good or error)\n"); 1845 DPRINTK("EXIT - early finish (good or error)\n");
1849 return 0; 1846 return 0;
1850 1847
1851 err_did: 1848 err_did:
1852 ata_qc_free(qc); 1849 ata_qc_free(qc);
1853 cmd->result = (DID_ERROR << 16); 1850 cmd->result = (DID_ERROR << 16);
1854 cmd->scsi_done(cmd); 1851 cmd->scsi_done(cmd);
1855 err_mem: 1852 err_mem:
1856 DPRINTK("EXIT - internal\n"); 1853 DPRINTK("EXIT - internal\n");
1857 return 0; 1854 return 0;
1858 1855
1859 defer: 1856 defer:
1860 ata_qc_free(qc); 1857 ata_qc_free(qc);
1861 DPRINTK("EXIT - defer\n"); 1858 DPRINTK("EXIT - defer\n");
1862 if (rc == ATA_DEFER_LINK) 1859 if (rc == ATA_DEFER_LINK)
1863 return SCSI_MLQUEUE_DEVICE_BUSY; 1860 return SCSI_MLQUEUE_DEVICE_BUSY;
1864 else 1861 else
1865 return SCSI_MLQUEUE_HOST_BUSY; 1862 return SCSI_MLQUEUE_HOST_BUSY;
1866 } 1863 }
1867 1864
1868 /** 1865 /**
1869 * ata_scsi_rbuf_get - Map response buffer. 1866 * ata_scsi_rbuf_get - Map response buffer.
1870 * @cmd: SCSI command containing buffer to be mapped. 1867 * @cmd: SCSI command containing buffer to be mapped.
1871 * @flags: unsigned long variable to store irq enable status 1868 * @flags: unsigned long variable to store irq enable status
1872 * @copy_in: copy in from user buffer 1869 * @copy_in: copy in from user buffer
1873 * 1870 *
1874 * Prepare buffer for simulated SCSI commands. 1871 * Prepare buffer for simulated SCSI commands.
1875 * 1872 *
1876 * LOCKING: 1873 * LOCKING:
1877 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1874 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1878 * 1875 *
1879 * RETURNS: 1876 * RETURNS:
1880 * Pointer to response buffer. 1877 * Pointer to response buffer.
1881 */ 1878 */
1882 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1879 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1883 unsigned long *flags) 1880 unsigned long *flags)
1884 { 1881 {
1885 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1882 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1886 1883
1887 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1884 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1888 if (copy_in) 1885 if (copy_in)
1889 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1886 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1890 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1887 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1891 return ata_scsi_rbuf; 1888 return ata_scsi_rbuf;
1892 } 1889 }
1893 1890
1894 /** 1891 /**
1895 * ata_scsi_rbuf_put - Unmap response buffer. 1892 * ata_scsi_rbuf_put - Unmap response buffer.
1896 * @cmd: SCSI command containing buffer to be unmapped. 1893 * @cmd: SCSI command containing buffer to be unmapped.
1897 * @copy_out: copy out result 1894 * @copy_out: copy out result
1898 * @flags: @flags passed to ata_scsi_rbuf_get() 1895 * @flags: @flags passed to ata_scsi_rbuf_get()
1899 * 1896 *
1900 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1897 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1901 * @copy_back is true. 1898 * @copy_back is true.
1902 * 1899 *
1903 * LOCKING: 1900 * LOCKING:
1904 * Unlocks ata_scsi_rbuf_lock. 1901 * Unlocks ata_scsi_rbuf_lock.
1905 */ 1902 */
1906 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1903 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1907 unsigned long *flags) 1904 unsigned long *flags)
1908 { 1905 {
1909 if (copy_out) 1906 if (copy_out)
1910 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1907 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1911 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1908 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1912 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1909 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1913 } 1910 }
1914 1911
1915 /** 1912 /**
1916 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1913 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1917 * @args: device IDENTIFY data / SCSI command of interest. 1914 * @args: device IDENTIFY data / SCSI command of interest.
1918 * @actor: Callback hook for desired SCSI command simulator 1915 * @actor: Callback hook for desired SCSI command simulator
1919 * 1916 *
1920 * Takes care of the hard work of simulating a SCSI command... 1917 * Takes care of the hard work of simulating a SCSI command...
1921 * Mapping the response buffer, calling the command's handler, 1918 * Mapping the response buffer, calling the command's handler,
1922 * and handling the handler's return value. This return value 1919 * and handling the handler's return value. This return value
1923 * indicates whether the handler wishes the SCSI command to be 1920 * indicates whether the handler wishes the SCSI command to be
1924 * completed successfully (0), or not (in which case cmd->result 1921 * completed successfully (0), or not (in which case cmd->result
1925 * and sense buffer are assumed to be set). 1922 * and sense buffer are assumed to be set).
1926 * 1923 *
1927 * LOCKING: 1924 * LOCKING:
1928 * spin_lock_irqsave(host lock) 1925 * spin_lock_irqsave(host lock)
1929 */ 1926 */
1930 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1927 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1931 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1928 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1932 { 1929 {
1933 u8 *rbuf; 1930 u8 *rbuf;
1934 unsigned int rc; 1931 unsigned int rc;
1935 struct scsi_cmnd *cmd = args->cmd; 1932 struct scsi_cmnd *cmd = args->cmd;
1936 unsigned long flags; 1933 unsigned long flags;
1937 1934
1938 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1935 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1939 rc = actor(args, rbuf); 1936 rc = actor(args, rbuf);
1940 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1937 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1941 1938
1942 if (rc == 0) 1939 if (rc == 0)
1943 cmd->result = SAM_STAT_GOOD; 1940 cmd->result = SAM_STAT_GOOD;
1944 args->done(cmd); 1941 args->done(cmd);
1945 } 1942 }
1946 1943
1947 /** 1944 /**
1948 * ata_scsiop_inq_std - Simulate INQUIRY command 1945 * ata_scsiop_inq_std - Simulate INQUIRY command
1949 * @args: device IDENTIFY data / SCSI command of interest. 1946 * @args: device IDENTIFY data / SCSI command of interest.
1950 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1947 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1951 * 1948 *
1952 * Returns standard device identification data associated 1949 * Returns standard device identification data associated
1953 * with non-VPD INQUIRY command output. 1950 * with non-VPD INQUIRY command output.
1954 * 1951 *
1955 * LOCKING: 1952 * LOCKING:
1956 * spin_lock_irqsave(host lock) 1953 * spin_lock_irqsave(host lock)
1957 */ 1954 */
1958 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1955 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1959 { 1956 {
1960 const u8 versions[] = { 1957 const u8 versions[] = {
1961 0x60, /* SAM-3 (no version claimed) */ 1958 0x60, /* SAM-3 (no version claimed) */
1962 1959
1963 0x03, 1960 0x03,
1964 0x20, /* SBC-2 (no version claimed) */ 1961 0x20, /* SBC-2 (no version claimed) */
1965 1962
1966 0x02, 1963 0x02,
1967 0x60 /* SPC-3 (no version claimed) */ 1964 0x60 /* SPC-3 (no version claimed) */
1968 }; 1965 };
1969 u8 hdr[] = { 1966 u8 hdr[] = {
1970 TYPE_DISK, 1967 TYPE_DISK,
1971 0, 1968 0,
1972 0x5, /* claim SPC-3 version compatibility */ 1969 0x5, /* claim SPC-3 version compatibility */
1973 2, 1970 2,
1974 95 - 4 1971 95 - 4
1975 }; 1972 };
1976 1973
1977 VPRINTK("ENTER\n"); 1974 VPRINTK("ENTER\n");
1978 1975
1979 /* set scsi removeable (RMB) bit per ata bit */ 1976 /* set scsi removeable (RMB) bit per ata bit */
1980 if (ata_id_removeable(args->id)) 1977 if (ata_id_removeable(args->id))
1981 hdr[1] |= (1 << 7); 1978 hdr[1] |= (1 << 7);
1982 1979
1983 memcpy(rbuf, hdr, sizeof(hdr)); 1980 memcpy(rbuf, hdr, sizeof(hdr));
1984 memcpy(&rbuf[8], "ATA ", 8); 1981 memcpy(&rbuf[8], "ATA ", 8);
1985 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1982 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1986 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1983 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1987 1984
1988 if (rbuf[32] == 0 || rbuf[32] == ' ') 1985 if (rbuf[32] == 0 || rbuf[32] == ' ')
1989 memcpy(&rbuf[32], "n/a ", 4); 1986 memcpy(&rbuf[32], "n/a ", 4);
1990 1987
1991 memcpy(rbuf + 59, versions, sizeof(versions)); 1988 memcpy(rbuf + 59, versions, sizeof(versions));
1992 1989
1993 return 0; 1990 return 0;
1994 } 1991 }
1995 1992
1996 /** 1993 /**
1997 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1994 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1998 * @args: device IDENTIFY data / SCSI command of interest. 1995 * @args: device IDENTIFY data / SCSI command of interest.
1999 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2000 * 1997 *
2001 * Returns list of inquiry VPD pages available. 1998 * Returns list of inquiry VPD pages available.
2002 * 1999 *
2003 * LOCKING: 2000 * LOCKING:
2004 * spin_lock_irqsave(host lock) 2001 * spin_lock_irqsave(host lock)
2005 */ 2002 */
2006 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2003 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2007 { 2004 {
2008 const u8 pages[] = { 2005 const u8 pages[] = {
2009 0x00, /* page 0x00, this page */ 2006 0x00, /* page 0x00, this page */
2010 0x80, /* page 0x80, unit serial no page */ 2007 0x80, /* page 0x80, unit serial no page */
2011 0x83, /* page 0x83, device ident page */ 2008 0x83, /* page 0x83, device ident page */
2012 0x89, /* page 0x89, ata info page */ 2009 0x89, /* page 0x89, ata info page */
2013 0xb0, /* page 0xb0, block limits page */ 2010 0xb0, /* page 0xb0, block limits page */
2014 0xb1, /* page 0xb1, block device characteristics page */ 2011 0xb1, /* page 0xb1, block device characteristics page */
2015 0xb2, /* page 0xb2, thin provisioning page */ 2012 0xb2, /* page 0xb2, thin provisioning page */
2016 }; 2013 };
2017 2014
2018 rbuf[3] = sizeof(pages); /* number of supported VPD pages */ 2015 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2019 memcpy(rbuf + 4, pages, sizeof(pages)); 2016 memcpy(rbuf + 4, pages, sizeof(pages));
2020 return 0; 2017 return 0;
2021 } 2018 }
2022 2019
2023 /** 2020 /**
2024 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2021 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2025 * @args: device IDENTIFY data / SCSI command of interest. 2022 * @args: device IDENTIFY data / SCSI command of interest.
2026 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2023 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2027 * 2024 *
2028 * Returns ATA device serial number. 2025 * Returns ATA device serial number.
2029 * 2026 *
2030 * LOCKING: 2027 * LOCKING:
2031 * spin_lock_irqsave(host lock) 2028 * spin_lock_irqsave(host lock)
2032 */ 2029 */
2033 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2030 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2034 { 2031 {
2035 const u8 hdr[] = { 2032 const u8 hdr[] = {
2036 0, 2033 0,
2037 0x80, /* this page code */ 2034 0x80, /* this page code */
2038 0, 2035 0,
2039 ATA_ID_SERNO_LEN, /* page len */ 2036 ATA_ID_SERNO_LEN, /* page len */
2040 }; 2037 };
2041 2038
2042 memcpy(rbuf, hdr, sizeof(hdr)); 2039 memcpy(rbuf, hdr, sizeof(hdr));
2043 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2040 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2044 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2041 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2045 return 0; 2042 return 0;
2046 } 2043 }
2047 2044
2048 /** 2045 /**
2049 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2046 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2050 * @args: device IDENTIFY data / SCSI command of interest. 2047 * @args: device IDENTIFY data / SCSI command of interest.
2051 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2048 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2052 * 2049 *
2053 * Yields two logical unit device identification designators: 2050 * Yields two logical unit device identification designators:
2054 * - vendor specific ASCII containing the ATA serial number 2051 * - vendor specific ASCII containing the ATA serial number
2055 * - SAT defined "t10 vendor id based" containing ASCII vendor 2052 * - SAT defined "t10 vendor id based" containing ASCII vendor
2056 * name ("ATA "), model and serial numbers. 2053 * name ("ATA "), model and serial numbers.
2057 * 2054 *
2058 * LOCKING: 2055 * LOCKING:
2059 * spin_lock_irqsave(host lock) 2056 * spin_lock_irqsave(host lock)
2060 */ 2057 */
2061 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2058 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2062 { 2059 {
2063 const int sat_model_serial_desc_len = 68; 2060 const int sat_model_serial_desc_len = 68;
2064 int num; 2061 int num;
2065 2062
2066 rbuf[1] = 0x83; /* this page code */ 2063 rbuf[1] = 0x83; /* this page code */
2067 num = 4; 2064 num = 4;
2068 2065
2069 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2066 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2070 rbuf[num + 0] = 2; 2067 rbuf[num + 0] = 2;
2071 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2068 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2072 num += 4; 2069 num += 4;
2073 ata_id_string(args->id, (unsigned char *) rbuf + num, 2070 ata_id_string(args->id, (unsigned char *) rbuf + num,
2074 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2071 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2075 num += ATA_ID_SERNO_LEN; 2072 num += ATA_ID_SERNO_LEN;
2076 2073
2077 /* SAT defined lu model and serial numbers descriptor */ 2074 /* SAT defined lu model and serial numbers descriptor */
2078 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2075 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2079 rbuf[num + 0] = 2; 2076 rbuf[num + 0] = 2;
2080 rbuf[num + 1] = 1; 2077 rbuf[num + 1] = 1;
2081 rbuf[num + 3] = sat_model_serial_desc_len; 2078 rbuf[num + 3] = sat_model_serial_desc_len;
2082 num += 4; 2079 num += 4;
2083 memcpy(rbuf + num, "ATA ", 8); 2080 memcpy(rbuf + num, "ATA ", 8);
2084 num += 8; 2081 num += 8;
2085 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2082 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2086 ATA_ID_PROD_LEN); 2083 ATA_ID_PROD_LEN);
2087 num += ATA_ID_PROD_LEN; 2084 num += ATA_ID_PROD_LEN;
2088 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2085 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2089 ATA_ID_SERNO_LEN); 2086 ATA_ID_SERNO_LEN);
2090 num += ATA_ID_SERNO_LEN; 2087 num += ATA_ID_SERNO_LEN;
2091 2088
2092 if (ata_id_has_wwn(args->id)) { 2089 if (ata_id_has_wwn(args->id)) {
2093 /* SAT defined lu world wide name */ 2090 /* SAT defined lu world wide name */
2094 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2091 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2095 rbuf[num + 0] = 1; 2092 rbuf[num + 0] = 1;
2096 rbuf[num + 1] = 3; 2093 rbuf[num + 1] = 3;
2097 rbuf[num + 3] = ATA_ID_WWN_LEN; 2094 rbuf[num + 3] = ATA_ID_WWN_LEN;
2098 num += 4; 2095 num += 4;
2099 ata_id_string(args->id, (unsigned char *) rbuf + num, 2096 ata_id_string(args->id, (unsigned char *) rbuf + num,
2100 ATA_ID_WWN, ATA_ID_WWN_LEN); 2097 ATA_ID_WWN, ATA_ID_WWN_LEN);
2101 num += ATA_ID_WWN_LEN; 2098 num += ATA_ID_WWN_LEN;
2102 } 2099 }
2103 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2100 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2104 return 0; 2101 return 0;
2105 } 2102 }
2106 2103
2107 /** 2104 /**
2108 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2105 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2109 * @args: device IDENTIFY data / SCSI command of interest. 2106 * @args: device IDENTIFY data / SCSI command of interest.
2110 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2107 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2111 * 2108 *
2112 * Yields SAT-specified ATA VPD page. 2109 * Yields SAT-specified ATA VPD page.
2113 * 2110 *
2114 * LOCKING: 2111 * LOCKING:
2115 * spin_lock_irqsave(host lock) 2112 * spin_lock_irqsave(host lock)
2116 */ 2113 */
2117 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2114 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2118 { 2115 {
2119 struct ata_taskfile tf; 2116 struct ata_taskfile tf;
2120 2117
2121 memset(&tf, 0, sizeof(tf)); 2118 memset(&tf, 0, sizeof(tf));
2122 2119
2123 rbuf[1] = 0x89; /* our page code */ 2120 rbuf[1] = 0x89; /* our page code */
2124 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2121 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2125 rbuf[3] = (0x238 & 0xff); 2122 rbuf[3] = (0x238 & 0xff);
2126 2123
2127 memcpy(&rbuf[8], "linux ", 8); 2124 memcpy(&rbuf[8], "linux ", 8);
2128 memcpy(&rbuf[16], "libata ", 16); 2125 memcpy(&rbuf[16], "libata ", 16);
2129 memcpy(&rbuf[32], DRV_VERSION, 4); 2126 memcpy(&rbuf[32], DRV_VERSION, 4);
2130 2127
2131 /* we don't store the ATA device signature, so we fake it */ 2128 /* we don't store the ATA device signature, so we fake it */
2132 2129
2133 tf.command = ATA_DRDY; /* really, this is Status reg */ 2130 tf.command = ATA_DRDY; /* really, this is Status reg */
2134 tf.lbal = 0x1; 2131 tf.lbal = 0x1;
2135 tf.nsect = 0x1; 2132 tf.nsect = 0x1;
2136 2133
2137 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2134 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2138 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2135 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2139 2136
2140 rbuf[56] = ATA_CMD_ID_ATA; 2137 rbuf[56] = ATA_CMD_ID_ATA;
2141 2138
2142 memcpy(&rbuf[60], &args->id[0], 512); 2139 memcpy(&rbuf[60], &args->id[0], 512);
2143 return 0; 2140 return 0;
2144 } 2141 }
2145 2142
2146 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2143 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2147 { 2144 {
2148 u16 min_io_sectors; 2145 u16 min_io_sectors;
2149 2146
2150 rbuf[1] = 0xb0; 2147 rbuf[1] = 0xb0;
2151 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2148 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2152 2149
2153 /* 2150 /*
2154 * Optimal transfer length granularity. 2151 * Optimal transfer length granularity.
2155 * 2152 *
2156 * This is always one physical block, but for disks with a smaller 2153 * This is always one physical block, but for disks with a smaller
2157 * logical than physical sector size we need to figure out what the 2154 * logical than physical sector size we need to figure out what the
2158 * latter is. 2155 * latter is.
2159 */ 2156 */
2160 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2157 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2161 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2158 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2162 2159
2163 /* 2160 /*
2164 * Optimal unmap granularity. 2161 * Optimal unmap granularity.
2165 * 2162 *
2166 * The ATA spec doesn't even know about a granularity or alignment 2163 * The ATA spec doesn't even know about a granularity or alignment
2167 * for the TRIM command. We can leave away most of the unmap related 2164 * for the TRIM command. We can leave away most of the unmap related
2168 * VPD page entries, but we have specifify a granularity to signal 2165 * VPD page entries, but we have specifify a granularity to signal
2169 * that we support some form of unmap - in thise case via WRITE SAME 2166 * that we support some form of unmap - in thise case via WRITE SAME
2170 * with the unmap bit set. 2167 * with the unmap bit set.
2171 */ 2168 */
2172 if (ata_id_has_trim(args->id)) { 2169 if (ata_id_has_trim(args->id)) {
2173 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]); 2170 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2174 put_unaligned_be32(1, &rbuf[28]); 2171 put_unaligned_be32(1, &rbuf[28]);
2175 } 2172 }
2176 2173
2177 return 0; 2174 return 0;
2178 } 2175 }
2179 2176
2180 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2177 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2181 { 2178 {
2182 int form_factor = ata_id_form_factor(args->id); 2179 int form_factor = ata_id_form_factor(args->id);
2183 int media_rotation_rate = ata_id_rotation_rate(args->id); 2180 int media_rotation_rate = ata_id_rotation_rate(args->id);
2184 2181
2185 rbuf[1] = 0xb1; 2182 rbuf[1] = 0xb1;
2186 rbuf[3] = 0x3c; 2183 rbuf[3] = 0x3c;
2187 rbuf[4] = media_rotation_rate >> 8; 2184 rbuf[4] = media_rotation_rate >> 8;
2188 rbuf[5] = media_rotation_rate; 2185 rbuf[5] = media_rotation_rate;
2189 rbuf[7] = form_factor; 2186 rbuf[7] = form_factor;
2190 2187
2191 return 0; 2188 return 0;
2192 } 2189 }
2193 2190
2194 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2191 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2195 { 2192 {
2196 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2193 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2197 rbuf[1] = 0xb2; 2194 rbuf[1] = 0xb2;
2198 rbuf[3] = 0x4; 2195 rbuf[3] = 0x4;
2199 rbuf[5] = 1 << 6; /* TPWS */ 2196 rbuf[5] = 1 << 6; /* TPWS */
2200 2197
2201 return 0; 2198 return 0;
2202 } 2199 }
2203 2200
2204 /** 2201 /**
2205 * ata_scsiop_noop - Command handler that simply returns success. 2202 * ata_scsiop_noop - Command handler that simply returns success.
2206 * @args: device IDENTIFY data / SCSI command of interest. 2203 * @args: device IDENTIFY data / SCSI command of interest.
2207 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2204 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2208 * 2205 *
2209 * No operation. Simply returns success to caller, to indicate 2206 * No operation. Simply returns success to caller, to indicate
2210 * that the caller should successfully complete this SCSI command. 2207 * that the caller should successfully complete this SCSI command.
2211 * 2208 *
2212 * LOCKING: 2209 * LOCKING:
2213 * spin_lock_irqsave(host lock) 2210 * spin_lock_irqsave(host lock)
2214 */ 2211 */
2215 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2212 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2216 { 2213 {
2217 VPRINTK("ENTER\n"); 2214 VPRINTK("ENTER\n");
2218 return 0; 2215 return 0;
2219 } 2216 }
2220 2217
2221 /** 2218 /**
2222 * modecpy - Prepare response for MODE SENSE 2219 * modecpy - Prepare response for MODE SENSE
2223 * @dest: output buffer 2220 * @dest: output buffer
2224 * @src: data being copied 2221 * @src: data being copied
2225 * @n: length of mode page 2222 * @n: length of mode page
2226 * @changeable: whether changeable parameters are requested 2223 * @changeable: whether changeable parameters are requested
2227 * 2224 *
2228 * Generate a generic MODE SENSE page for either current or changeable 2225 * Generate a generic MODE SENSE page for either current or changeable
2229 * parameters. 2226 * parameters.
2230 * 2227 *
2231 * LOCKING: 2228 * LOCKING:
2232 * None. 2229 * None.
2233 */ 2230 */
2234 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2231 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2235 { 2232 {
2236 if (changeable) { 2233 if (changeable) {
2237 memcpy(dest, src, 2); 2234 memcpy(dest, src, 2);
2238 memset(dest + 2, 0, n - 2); 2235 memset(dest + 2, 0, n - 2);
2239 } else { 2236 } else {
2240 memcpy(dest, src, n); 2237 memcpy(dest, src, n);
2241 } 2238 }
2242 } 2239 }
2243 2240
2244 /** 2241 /**
2245 * ata_msense_caching - Simulate MODE SENSE caching info page 2242 * ata_msense_caching - Simulate MODE SENSE caching info page
2246 * @id: device IDENTIFY data 2243 * @id: device IDENTIFY data
2247 * @buf: output buffer 2244 * @buf: output buffer
2248 * @changeable: whether changeable parameters are requested 2245 * @changeable: whether changeable parameters are requested
2249 * 2246 *
2250 * Generate a caching info page, which conditionally indicates 2247 * Generate a caching info page, which conditionally indicates
2251 * write caching to the SCSI layer, depending on device 2248 * write caching to the SCSI layer, depending on device
2252 * capabilities. 2249 * capabilities.
2253 * 2250 *
2254 * LOCKING: 2251 * LOCKING:
2255 * None. 2252 * None.
2256 */ 2253 */
2257 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2254 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2258 { 2255 {
2259 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2256 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2260 if (changeable || ata_id_wcache_enabled(id)) 2257 if (changeable || ata_id_wcache_enabled(id))
2261 buf[2] |= (1 << 2); /* write cache enable */ 2258 buf[2] |= (1 << 2); /* write cache enable */
2262 if (!changeable && !ata_id_rahead_enabled(id)) 2259 if (!changeable && !ata_id_rahead_enabled(id))
2263 buf[12] |= (1 << 5); /* disable read ahead */ 2260 buf[12] |= (1 << 5); /* disable read ahead */
2264 return sizeof(def_cache_mpage); 2261 return sizeof(def_cache_mpage);
2265 } 2262 }
2266 2263
2267 /** 2264 /**
2268 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 2265 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2269 * @buf: output buffer 2266 * @buf: output buffer
2270 * @changeable: whether changeable parameters are requested 2267 * @changeable: whether changeable parameters are requested
2271 * 2268 *
2272 * Generate a generic MODE SENSE control mode page. 2269 * Generate a generic MODE SENSE control mode page.
2273 * 2270 *
2274 * LOCKING: 2271 * LOCKING:
2275 * None. 2272 * None.
2276 */ 2273 */
2277 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable) 2274 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2278 { 2275 {
2279 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2276 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2280 return sizeof(def_control_mpage); 2277 return sizeof(def_control_mpage);
2281 } 2278 }
2282 2279
2283 /** 2280 /**
2284 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2281 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2285 * @buf: output buffer 2282 * @buf: output buffer
2286 * @changeable: whether changeable parameters are requested 2283 * @changeable: whether changeable parameters are requested
2287 * 2284 *
2288 * Generate a generic MODE SENSE r/w error recovery page. 2285 * Generate a generic MODE SENSE r/w error recovery page.
2289 * 2286 *
2290 * LOCKING: 2287 * LOCKING:
2291 * None. 2288 * None.
2292 */ 2289 */
2293 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2290 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2294 { 2291 {
2295 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2292 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2296 changeable); 2293 changeable);
2297 return sizeof(def_rw_recovery_mpage); 2294 return sizeof(def_rw_recovery_mpage);
2298 } 2295 }
2299 2296
2300 /* 2297 /*
2301 * We can turn this into a real blacklist if it's needed, for now just 2298 * We can turn this into a real blacklist if it's needed, for now just
2302 * blacklist any Maxtor BANC1G10 revision firmware 2299 * blacklist any Maxtor BANC1G10 revision firmware
2303 */ 2300 */
2304 static int ata_dev_supports_fua(u16 *id) 2301 static int ata_dev_supports_fua(u16 *id)
2305 { 2302 {
2306 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2303 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2307 2304
2308 if (!libata_fua) 2305 if (!libata_fua)
2309 return 0; 2306 return 0;
2310 if (!ata_id_has_fua(id)) 2307 if (!ata_id_has_fua(id))
2311 return 0; 2308 return 0;
2312 2309
2313 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2310 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2314 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2311 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2315 2312
2316 if (strcmp(model, "Maxtor")) 2313 if (strcmp(model, "Maxtor"))
2317 return 1; 2314 return 1;
2318 if (strcmp(fw, "BANC1G10")) 2315 if (strcmp(fw, "BANC1G10"))
2319 return 1; 2316 return 1;
2320 2317
2321 return 0; /* blacklisted */ 2318 return 0; /* blacklisted */
2322 } 2319 }
2323 2320
2324 /** 2321 /**
2325 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2322 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2326 * @args: device IDENTIFY data / SCSI command of interest. 2323 * @args: device IDENTIFY data / SCSI command of interest.
2327 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2324 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2328 * 2325 *
2329 * Simulate MODE SENSE commands. Assume this is invoked for direct 2326 * Simulate MODE SENSE commands. Assume this is invoked for direct
2330 * access devices (e.g. disks) only. There should be no block 2327 * access devices (e.g. disks) only. There should be no block
2331 * descriptor for other device types. 2328 * descriptor for other device types.
2332 * 2329 *
2333 * LOCKING: 2330 * LOCKING:
2334 * spin_lock_irqsave(host lock) 2331 * spin_lock_irqsave(host lock)
2335 */ 2332 */
2336 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2333 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2337 { 2334 {
2338 struct ata_device *dev = args->dev; 2335 struct ata_device *dev = args->dev;
2339 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2336 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2340 const u8 sat_blk_desc[] = { 2337 const u8 sat_blk_desc[] = {
2341 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2338 0, 0, 0, 0, /* number of blocks: sat unspecified */
2342 0, 2339 0,
2343 0, 0x2, 0x0 /* block length: 512 bytes */ 2340 0, 0x2, 0x0 /* block length: 512 bytes */
2344 }; 2341 };
2345 u8 pg, spg; 2342 u8 pg, spg;
2346 unsigned int ebd, page_control, six_byte; 2343 unsigned int ebd, page_control, six_byte;
2347 u8 dpofua; 2344 u8 dpofua;
2348 2345
2349 VPRINTK("ENTER\n"); 2346 VPRINTK("ENTER\n");
2350 2347
2351 six_byte = (scsicmd[0] == MODE_SENSE); 2348 six_byte = (scsicmd[0] == MODE_SENSE);
2352 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2349 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2353 /* 2350 /*
2354 * LLBA bit in msense(10) ignored (compliant) 2351 * LLBA bit in msense(10) ignored (compliant)
2355 */ 2352 */
2356 2353
2357 page_control = scsicmd[2] >> 6; 2354 page_control = scsicmd[2] >> 6;
2358 switch (page_control) { 2355 switch (page_control) {
2359 case 0: /* current */ 2356 case 0: /* current */
2360 case 1: /* changeable */ 2357 case 1: /* changeable */
2361 case 2: /* defaults */ 2358 case 2: /* defaults */
2362 break; /* supported */ 2359 break; /* supported */
2363 case 3: /* saved */ 2360 case 3: /* saved */
2364 goto saving_not_supp; 2361 goto saving_not_supp;
2365 default: 2362 default:
2366 goto invalid_fld; 2363 goto invalid_fld;
2367 } 2364 }
2368 2365
2369 if (six_byte) 2366 if (six_byte)
2370 p += 4 + (ebd ? 8 : 0); 2367 p += 4 + (ebd ? 8 : 0);
2371 else 2368 else
2372 p += 8 + (ebd ? 8 : 0); 2369 p += 8 + (ebd ? 8 : 0);
2373 2370
2374 pg = scsicmd[2] & 0x3f; 2371 pg = scsicmd[2] & 0x3f;
2375 spg = scsicmd[3]; 2372 spg = scsicmd[3];
2376 /* 2373 /*
2377 * No mode subpages supported (yet) but asking for _all_ 2374 * No mode subpages supported (yet) but asking for _all_
2378 * subpages may be valid 2375 * subpages may be valid
2379 */ 2376 */
2380 if (spg && (spg != ALL_SUB_MPAGES)) 2377 if (spg && (spg != ALL_SUB_MPAGES))
2381 goto invalid_fld; 2378 goto invalid_fld;
2382 2379
2383 switch(pg) { 2380 switch(pg) {
2384 case RW_RECOVERY_MPAGE: 2381 case RW_RECOVERY_MPAGE:
2385 p += ata_msense_rw_recovery(p, page_control == 1); 2382 p += ata_msense_rw_recovery(p, page_control == 1);
2386 break; 2383 break;
2387 2384
2388 case CACHE_MPAGE: 2385 case CACHE_MPAGE:
2389 p += ata_msense_caching(args->id, p, page_control == 1); 2386 p += ata_msense_caching(args->id, p, page_control == 1);
2390 break; 2387 break;
2391 2388
2392 case CONTROL_MPAGE: 2389 case CONTROL_MPAGE:
2393 p += ata_msense_ctl_mode(p, page_control == 1); 2390 p += ata_msense_ctl_mode(p, page_control == 1);
2394 break; 2391 break;
2395 2392
2396 case ALL_MPAGES: 2393 case ALL_MPAGES:
2397 p += ata_msense_rw_recovery(p, page_control == 1); 2394 p += ata_msense_rw_recovery(p, page_control == 1);
2398 p += ata_msense_caching(args->id, p, page_control == 1); 2395 p += ata_msense_caching(args->id, p, page_control == 1);
2399 p += ata_msense_ctl_mode(p, page_control == 1); 2396 p += ata_msense_ctl_mode(p, page_control == 1);
2400 break; 2397 break;
2401 2398
2402 default: /* invalid page code */ 2399 default: /* invalid page code */
2403 goto invalid_fld; 2400 goto invalid_fld;
2404 } 2401 }
2405 2402
2406 dpofua = 0; 2403 dpofua = 0;
2407 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2404 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2408 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2405 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2409 dpofua = 1 << 4; 2406 dpofua = 1 << 4;
2410 2407
2411 if (six_byte) { 2408 if (six_byte) {
2412 rbuf[0] = p - rbuf - 1; 2409 rbuf[0] = p - rbuf - 1;
2413 rbuf[2] |= dpofua; 2410 rbuf[2] |= dpofua;
2414 if (ebd) { 2411 if (ebd) {
2415 rbuf[3] = sizeof(sat_blk_desc); 2412 rbuf[3] = sizeof(sat_blk_desc);
2416 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2413 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2417 } 2414 }
2418 } else { 2415 } else {
2419 unsigned int output_len = p - rbuf - 2; 2416 unsigned int output_len = p - rbuf - 2;
2420 2417
2421 rbuf[0] = output_len >> 8; 2418 rbuf[0] = output_len >> 8;
2422 rbuf[1] = output_len; 2419 rbuf[1] = output_len;
2423 rbuf[3] |= dpofua; 2420 rbuf[3] |= dpofua;
2424 if (ebd) { 2421 if (ebd) {
2425 rbuf[7] = sizeof(sat_blk_desc); 2422 rbuf[7] = sizeof(sat_blk_desc);
2426 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2423 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2427 } 2424 }
2428 } 2425 }
2429 return 0; 2426 return 0;
2430 2427
2431 invalid_fld: 2428 invalid_fld:
2432 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); 2429 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2433 /* "Invalid field in cbd" */ 2430 /* "Invalid field in cbd" */
2434 return 1; 2431 return 1;
2435 2432
2436 saving_not_supp: 2433 saving_not_supp:
2437 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2434 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2438 /* "Saving parameters not supported" */ 2435 /* "Saving parameters not supported" */
2439 return 1; 2436 return 1;
2440 } 2437 }
2441 2438
2442 /** 2439 /**
2443 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2440 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2444 * @args: device IDENTIFY data / SCSI command of interest. 2441 * @args: device IDENTIFY data / SCSI command of interest.
2445 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2442 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2446 * 2443 *
2447 * Simulate READ CAPACITY commands. 2444 * Simulate READ CAPACITY commands.
2448 * 2445 *
2449 * LOCKING: 2446 * LOCKING:
2450 * None. 2447 * None.
2451 */ 2448 */
2452 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2449 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2453 { 2450 {
2454 struct ata_device *dev = args->dev; 2451 struct ata_device *dev = args->dev;
2455 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2452 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2456 u32 sector_size; /* physical sector size in bytes */ 2453 u32 sector_size; /* physical sector size in bytes */
2457 u8 log2_per_phys; 2454 u8 log2_per_phys;
2458 u16 lowest_aligned; 2455 u16 lowest_aligned;
2459 2456
2460 sector_size = ata_id_logical_sector_size(dev->id); 2457 sector_size = ata_id_logical_sector_size(dev->id);
2461 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2458 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2462 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2459 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2463 2460
2464 VPRINTK("ENTER\n"); 2461 VPRINTK("ENTER\n");
2465 2462
2466 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2463 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2467 if (last_lba >= 0xffffffffULL) 2464 if (last_lba >= 0xffffffffULL)
2468 last_lba = 0xffffffff; 2465 last_lba = 0xffffffff;
2469 2466
2470 /* sector count, 32-bit */ 2467 /* sector count, 32-bit */
2471 rbuf[0] = last_lba >> (8 * 3); 2468 rbuf[0] = last_lba >> (8 * 3);
2472 rbuf[1] = last_lba >> (8 * 2); 2469 rbuf[1] = last_lba >> (8 * 2);
2473 rbuf[2] = last_lba >> (8 * 1); 2470 rbuf[2] = last_lba >> (8 * 1);
2474 rbuf[3] = last_lba; 2471 rbuf[3] = last_lba;
2475 2472
2476 /* sector size */ 2473 /* sector size */
2477 rbuf[4] = sector_size >> (8 * 3); 2474 rbuf[4] = sector_size >> (8 * 3);
2478 rbuf[5] = sector_size >> (8 * 2); 2475 rbuf[5] = sector_size >> (8 * 2);
2479 rbuf[6] = sector_size >> (8 * 1); 2476 rbuf[6] = sector_size >> (8 * 1);
2480 rbuf[7] = sector_size; 2477 rbuf[7] = sector_size;
2481 } else { 2478 } else {
2482 /* sector count, 64-bit */ 2479 /* sector count, 64-bit */
2483 rbuf[0] = last_lba >> (8 * 7); 2480 rbuf[0] = last_lba >> (8 * 7);
2484 rbuf[1] = last_lba >> (8 * 6); 2481 rbuf[1] = last_lba >> (8 * 6);
2485 rbuf[2] = last_lba >> (8 * 5); 2482 rbuf[2] = last_lba >> (8 * 5);
2486 rbuf[3] = last_lba >> (8 * 4); 2483 rbuf[3] = last_lba >> (8 * 4);
2487 rbuf[4] = last_lba >> (8 * 3); 2484 rbuf[4] = last_lba >> (8 * 3);
2488 rbuf[5] = last_lba >> (8 * 2); 2485 rbuf[5] = last_lba >> (8 * 2);
2489 rbuf[6] = last_lba >> (8 * 1); 2486 rbuf[6] = last_lba >> (8 * 1);
2490 rbuf[7] = last_lba; 2487 rbuf[7] = last_lba;
2491 2488
2492 /* sector size */ 2489 /* sector size */
2493 rbuf[ 8] = sector_size >> (8 * 3); 2490 rbuf[ 8] = sector_size >> (8 * 3);
2494 rbuf[ 9] = sector_size >> (8 * 2); 2491 rbuf[ 9] = sector_size >> (8 * 2);
2495 rbuf[10] = sector_size >> (8 * 1); 2492 rbuf[10] = sector_size >> (8 * 1);
2496 rbuf[11] = sector_size; 2493 rbuf[11] = sector_size;
2497 2494
2498 rbuf[12] = 0; 2495 rbuf[12] = 0;
2499 rbuf[13] = log2_per_phys; 2496 rbuf[13] = log2_per_phys;
2500 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2497 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2501 rbuf[15] = lowest_aligned; 2498 rbuf[15] = lowest_aligned;
2502 2499
2503 if (ata_id_has_trim(args->id)) { 2500 if (ata_id_has_trim(args->id)) {
2504 rbuf[14] |= 0x80; /* TPE */ 2501 rbuf[14] |= 0x80; /* TPE */
2505 2502
2506 if (ata_id_has_zero_after_trim(args->id)) 2503 if (ata_id_has_zero_after_trim(args->id))
2507 rbuf[14] |= 0x40; /* TPRZ */ 2504 rbuf[14] |= 0x40; /* TPRZ */
2508 } 2505 }
2509 } 2506 }
2510 2507
2511 return 0; 2508 return 0;
2512 } 2509 }
2513 2510
2514 /** 2511 /**
2515 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2512 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2516 * @args: device IDENTIFY data / SCSI command of interest. 2513 * @args: device IDENTIFY data / SCSI command of interest.
2517 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2514 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2518 * 2515 *
2519 * Simulate REPORT LUNS command. 2516 * Simulate REPORT LUNS command.
2520 * 2517 *
2521 * LOCKING: 2518 * LOCKING:
2522 * spin_lock_irqsave(host lock) 2519 * spin_lock_irqsave(host lock)
2523 */ 2520 */
2524 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2521 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2525 { 2522 {
2526 VPRINTK("ENTER\n"); 2523 VPRINTK("ENTER\n");
2527 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2524 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2528 2525
2529 return 0; 2526 return 0;
2530 } 2527 }
2531 2528
2532 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2529 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2533 { 2530 {
2534 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2531 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2535 /* FIXME: not quite right; we don't want the 2532 /* FIXME: not quite right; we don't want the
2536 * translation of taskfile registers into 2533 * translation of taskfile registers into
2537 * a sense descriptors, since that's only 2534 * a sense descriptors, since that's only
2538 * correct for ATA, not ATAPI 2535 * correct for ATA, not ATAPI
2539 */ 2536 */
2540 ata_gen_passthru_sense(qc); 2537 ata_gen_passthru_sense(qc);
2541 } 2538 }
2542 2539
2543 qc->scsidone(qc->scsicmd); 2540 qc->scsidone(qc->scsicmd);
2544 ata_qc_free(qc); 2541 ata_qc_free(qc);
2545 } 2542 }
2546 2543
2547 /* is it pointless to prefer PIO for "safety reasons"? */ 2544 /* is it pointless to prefer PIO for "safety reasons"? */
2548 static inline int ata_pio_use_silly(struct ata_port *ap) 2545 static inline int ata_pio_use_silly(struct ata_port *ap)
2549 { 2546 {
2550 return (ap->flags & ATA_FLAG_PIO_DMA); 2547 return (ap->flags & ATA_FLAG_PIO_DMA);
2551 } 2548 }
2552 2549
2553 static void atapi_request_sense(struct ata_queued_cmd *qc) 2550 static void atapi_request_sense(struct ata_queued_cmd *qc)
2554 { 2551 {
2555 struct ata_port *ap = qc->ap; 2552 struct ata_port *ap = qc->ap;
2556 struct scsi_cmnd *cmd = qc->scsicmd; 2553 struct scsi_cmnd *cmd = qc->scsicmd;
2557 2554
2558 DPRINTK("ATAPI request sense\n"); 2555 DPRINTK("ATAPI request sense\n");
2559 2556
2560 /* FIXME: is this needed? */ 2557 /* FIXME: is this needed? */
2561 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2558 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2562 2559
2563 #ifdef CONFIG_ATA_SFF 2560 #ifdef CONFIG_ATA_SFF
2564 if (ap->ops->sff_tf_read) 2561 if (ap->ops->sff_tf_read)
2565 ap->ops->sff_tf_read(ap, &qc->tf); 2562 ap->ops->sff_tf_read(ap, &qc->tf);
2566 #endif 2563 #endif
2567 2564
2568 /* fill these in, for the case where they are -not- overwritten */ 2565 /* fill these in, for the case where they are -not- overwritten */
2569 cmd->sense_buffer[0] = 0x70; 2566 cmd->sense_buffer[0] = 0x70;
2570 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2567 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2571 2568
2572 ata_qc_reinit(qc); 2569 ata_qc_reinit(qc);
2573 2570
2574 /* setup sg table and init transfer direction */ 2571 /* setup sg table and init transfer direction */
2575 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2572 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2576 ata_sg_init(qc, &qc->sgent, 1); 2573 ata_sg_init(qc, &qc->sgent, 1);
2577 qc->dma_dir = DMA_FROM_DEVICE; 2574 qc->dma_dir = DMA_FROM_DEVICE;
2578 2575
2579 memset(&qc->cdb, 0, qc->dev->cdb_len); 2576 memset(&qc->cdb, 0, qc->dev->cdb_len);
2580 qc->cdb[0] = REQUEST_SENSE; 2577 qc->cdb[0] = REQUEST_SENSE;
2581 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2578 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2582 2579
2583 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2580 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2584 qc->tf.command = ATA_CMD_PACKET; 2581 qc->tf.command = ATA_CMD_PACKET;
2585 2582
2586 if (ata_pio_use_silly(ap)) { 2583 if (ata_pio_use_silly(ap)) {
2587 qc->tf.protocol = ATAPI_PROT_DMA; 2584 qc->tf.protocol = ATAPI_PROT_DMA;
2588 qc->tf.feature |= ATAPI_PKT_DMA; 2585 qc->tf.feature |= ATAPI_PKT_DMA;
2589 } else { 2586 } else {
2590 qc->tf.protocol = ATAPI_PROT_PIO; 2587 qc->tf.protocol = ATAPI_PROT_PIO;
2591 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2588 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2592 qc->tf.lbah = 0; 2589 qc->tf.lbah = 0;
2593 } 2590 }
2594 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2591 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2595 2592
2596 qc->complete_fn = atapi_sense_complete; 2593 qc->complete_fn = atapi_sense_complete;
2597 2594
2598 ata_qc_issue(qc); 2595 ata_qc_issue(qc);
2599 2596
2600 DPRINTK("EXIT\n"); 2597 DPRINTK("EXIT\n");
2601 } 2598 }
2602 2599
2603 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2600 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2604 { 2601 {
2605 struct scsi_cmnd *cmd = qc->scsicmd; 2602 struct scsi_cmnd *cmd = qc->scsicmd;
2606 unsigned int err_mask = qc->err_mask; 2603 unsigned int err_mask = qc->err_mask;
2607 2604
2608 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2605 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2609 2606
2610 /* handle completion from new EH */ 2607 /* handle completion from new EH */
2611 if (unlikely(qc->ap->ops->error_handler && 2608 if (unlikely(qc->ap->ops->error_handler &&
2612 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2609 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2613 2610
2614 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2611 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2615 /* FIXME: not quite right; we don't want the 2612 /* FIXME: not quite right; we don't want the
2616 * translation of taskfile registers into a 2613 * translation of taskfile registers into a
2617 * sense descriptors, since that's only 2614 * sense descriptors, since that's only
2618 * correct for ATA, not ATAPI 2615 * correct for ATA, not ATAPI
2619 */ 2616 */
2620 ata_gen_passthru_sense(qc); 2617 ata_gen_passthru_sense(qc);
2621 } 2618 }
2622 2619
2623 /* SCSI EH automatically locks door if sdev->locked is 2620 /* SCSI EH automatically locks door if sdev->locked is
2624 * set. Sometimes door lock request continues to 2621 * set. Sometimes door lock request continues to
2625 * fail, for example, when no media is present. This 2622 * fail, for example, when no media is present. This
2626 * creates a loop - SCSI EH issues door lock which 2623 * creates a loop - SCSI EH issues door lock which
2627 * fails and gets invoked again to acquire sense data 2624 * fails and gets invoked again to acquire sense data
2628 * for the failed command. 2625 * for the failed command.
2629 * 2626 *
2630 * If door lock fails, always clear sdev->locked to 2627 * If door lock fails, always clear sdev->locked to
2631 * avoid this infinite loop. 2628 * avoid this infinite loop.
2632 * 2629 *
2633 * This may happen before SCSI scan is complete. Make 2630 * This may happen before SCSI scan is complete. Make
2634 * sure qc->dev->sdev isn't NULL before dereferencing. 2631 * sure qc->dev->sdev isn't NULL before dereferencing.
2635 */ 2632 */
2636 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2633 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2637 qc->dev->sdev->locked = 0; 2634 qc->dev->sdev->locked = 0;
2638 2635
2639 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2636 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2640 qc->scsidone(cmd); 2637 qc->scsidone(cmd);
2641 ata_qc_free(qc); 2638 ata_qc_free(qc);
2642 return; 2639 return;
2643 } 2640 }
2644 2641
2645 /* successful completion or old EH failure path */ 2642 /* successful completion or old EH failure path */
2646 if (unlikely(err_mask & AC_ERR_DEV)) { 2643 if (unlikely(err_mask & AC_ERR_DEV)) {
2647 cmd->result = SAM_STAT_CHECK_CONDITION; 2644 cmd->result = SAM_STAT_CHECK_CONDITION;
2648 atapi_request_sense(qc); 2645 atapi_request_sense(qc);
2649 return; 2646 return;
2650 } else if (unlikely(err_mask)) { 2647 } else if (unlikely(err_mask)) {
2651 /* FIXME: not quite right; we don't want the 2648 /* FIXME: not quite right; we don't want the
2652 * translation of taskfile registers into 2649 * translation of taskfile registers into
2653 * a sense descriptors, since that's only 2650 * a sense descriptors, since that's only
2654 * correct for ATA, not ATAPI 2651 * correct for ATA, not ATAPI
2655 */ 2652 */
2656 ata_gen_passthru_sense(qc); 2653 ata_gen_passthru_sense(qc);
2657 } else { 2654 } else {
2658 u8 *scsicmd = cmd->cmnd; 2655 u8 *scsicmd = cmd->cmnd;
2659 2656
2660 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2657 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2661 unsigned long flags; 2658 unsigned long flags;
2662 u8 *buf; 2659 u8 *buf;
2663 2660
2664 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2661 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2665 2662
2666 /* ATAPI devices typically report zero for their SCSI version, 2663 /* ATAPI devices typically report zero for their SCSI version,
2667 * and sometimes deviate from the spec WRT response data 2664 * and sometimes deviate from the spec WRT response data
2668 * format. If SCSI version is reported as zero like normal, 2665 * format. If SCSI version is reported as zero like normal,
2669 * then we make the following fixups: 1) Fake MMC-5 version, 2666 * then we make the following fixups: 1) Fake MMC-5 version,
2670 * to indicate to the Linux scsi midlayer this is a modern 2667 * to indicate to the Linux scsi midlayer this is a modern
2671 * device. 2) Ensure response data format / ATAPI information 2668 * device. 2) Ensure response data format / ATAPI information
2672 * are always correct. 2669 * are always correct.
2673 */ 2670 */
2674 if (buf[2] == 0) { 2671 if (buf[2] == 0) {
2675 buf[2] = 0x5; 2672 buf[2] = 0x5;
2676 buf[3] = 0x32; 2673 buf[3] = 0x32;
2677 } 2674 }
2678 2675
2679 ata_scsi_rbuf_put(cmd, true, &flags); 2676 ata_scsi_rbuf_put(cmd, true, &flags);
2680 } 2677 }
2681 2678
2682 cmd->result = SAM_STAT_GOOD; 2679 cmd->result = SAM_STAT_GOOD;
2683 } 2680 }
2684 2681
2685 qc->scsidone(cmd); 2682 qc->scsidone(cmd);
2686 ata_qc_free(qc); 2683 ata_qc_free(qc);
2687 } 2684 }
2688 /** 2685 /**
2689 * atapi_xlat - Initialize PACKET taskfile 2686 * atapi_xlat - Initialize PACKET taskfile
2690 * @qc: command structure to be initialized 2687 * @qc: command structure to be initialized
2691 * 2688 *
2692 * LOCKING: 2689 * LOCKING:
2693 * spin_lock_irqsave(host lock) 2690 * spin_lock_irqsave(host lock)
2694 * 2691 *
2695 * RETURNS: 2692 * RETURNS:
2696 * Zero on success, non-zero on failure. 2693 * Zero on success, non-zero on failure.
2697 */ 2694 */
2698 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2695 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2699 { 2696 {
2700 struct scsi_cmnd *scmd = qc->scsicmd; 2697 struct scsi_cmnd *scmd = qc->scsicmd;
2701 struct ata_device *dev = qc->dev; 2698 struct ata_device *dev = qc->dev;
2702 int nodata = (scmd->sc_data_direction == DMA_NONE); 2699 int nodata = (scmd->sc_data_direction == DMA_NONE);
2703 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2700 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2704 unsigned int nbytes; 2701 unsigned int nbytes;
2705 2702
2706 memset(qc->cdb, 0, dev->cdb_len); 2703 memset(qc->cdb, 0, dev->cdb_len);
2707 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2704 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2708 2705
2709 qc->complete_fn = atapi_qc_complete; 2706 qc->complete_fn = atapi_qc_complete;
2710 2707
2711 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2708 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2712 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2709 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2713 qc->tf.flags |= ATA_TFLAG_WRITE; 2710 qc->tf.flags |= ATA_TFLAG_WRITE;
2714 DPRINTK("direction: write\n"); 2711 DPRINTK("direction: write\n");
2715 } 2712 }
2716 2713
2717 qc->tf.command = ATA_CMD_PACKET; 2714 qc->tf.command = ATA_CMD_PACKET;
2718 ata_qc_set_pc_nbytes(qc); 2715 ata_qc_set_pc_nbytes(qc);
2719 2716
2720 /* check whether ATAPI DMA is safe */ 2717 /* check whether ATAPI DMA is safe */
2721 if (!nodata && !using_pio && atapi_check_dma(qc)) 2718 if (!nodata && !using_pio && atapi_check_dma(qc))
2722 using_pio = 1; 2719 using_pio = 1;
2723 2720
2724 /* Some controller variants snoop this value for Packet 2721 /* Some controller variants snoop this value for Packet
2725 * transfers to do state machine and FIFO management. Thus we 2722 * transfers to do state machine and FIFO management. Thus we
2726 * want to set it properly, and for DMA where it is 2723 * want to set it properly, and for DMA where it is
2727 * effectively meaningless. 2724 * effectively meaningless.
2728 */ 2725 */
2729 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2726 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2730 2727
2731 /* Most ATAPI devices which honor transfer chunk size don't 2728 /* Most ATAPI devices which honor transfer chunk size don't
2732 * behave according to the spec when odd chunk size which 2729 * behave according to the spec when odd chunk size which
2733 * matches the transfer length is specified. If the number of 2730 * matches the transfer length is specified. If the number of
2734 * bytes to transfer is 2n+1. According to the spec, what 2731 * bytes to transfer is 2n+1. According to the spec, what
2735 * should happen is to indicate that 2n+1 is going to be 2732 * should happen is to indicate that 2n+1 is going to be
2736 * transferred and transfer 2n+2 bytes where the last byte is 2733 * transferred and transfer 2n+2 bytes where the last byte is
2737 * padding. 2734 * padding.
2738 * 2735 *
2739 * In practice, this doesn't happen. ATAPI devices first 2736 * In practice, this doesn't happen. ATAPI devices first
2740 * indicate and transfer 2n bytes and then indicate and 2737 * indicate and transfer 2n bytes and then indicate and
2741 * transfer 2 bytes where the last byte is padding. 2738 * transfer 2 bytes where the last byte is padding.
2742 * 2739 *
2743 * This inconsistency confuses several controllers which 2740 * This inconsistency confuses several controllers which
2744 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2741 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2745 * These controllers use actual number of transferred bytes to 2742 * These controllers use actual number of transferred bytes to
2746 * update DMA poitner and transfer of 4n+2 bytes make those 2743 * update DMA poitner and transfer of 4n+2 bytes make those
2747 * controller push DMA pointer by 4n+4 bytes because SATA data 2744 * controller push DMA pointer by 4n+4 bytes because SATA data
2748 * FISes are aligned to 4 bytes. This causes data corruption 2745 * FISes are aligned to 4 bytes. This causes data corruption
2749 * and buffer overrun. 2746 * and buffer overrun.
2750 * 2747 *
2751 * Always setting nbytes to even number solves this problem 2748 * Always setting nbytes to even number solves this problem
2752 * because then ATAPI devices don't have to split data at 2n 2749 * because then ATAPI devices don't have to split data at 2n
2753 * boundaries. 2750 * boundaries.
2754 */ 2751 */
2755 if (nbytes & 0x1) 2752 if (nbytes & 0x1)
2756 nbytes++; 2753 nbytes++;
2757 2754
2758 qc->tf.lbam = (nbytes & 0xFF); 2755 qc->tf.lbam = (nbytes & 0xFF);
2759 qc->tf.lbah = (nbytes >> 8); 2756 qc->tf.lbah = (nbytes >> 8);
2760 2757
2761 if (nodata) 2758 if (nodata)
2762 qc->tf.protocol = ATAPI_PROT_NODATA; 2759 qc->tf.protocol = ATAPI_PROT_NODATA;
2763 else if (using_pio) 2760 else if (using_pio)
2764 qc->tf.protocol = ATAPI_PROT_PIO; 2761 qc->tf.protocol = ATAPI_PROT_PIO;
2765 else { 2762 else {
2766 /* DMA data xfer */ 2763 /* DMA data xfer */
2767 qc->tf.protocol = ATAPI_PROT_DMA; 2764 qc->tf.protocol = ATAPI_PROT_DMA;
2768 qc->tf.feature |= ATAPI_PKT_DMA; 2765 qc->tf.feature |= ATAPI_PKT_DMA;
2769 2766
2770 if ((dev->flags & ATA_DFLAG_DMADIR) && 2767 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2771 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2768 (scmd->sc_data_direction != DMA_TO_DEVICE))
2772 /* some SATA bridges need us to indicate data xfer direction */ 2769 /* some SATA bridges need us to indicate data xfer direction */
2773 qc->tf.feature |= ATAPI_DMADIR; 2770 qc->tf.feature |= ATAPI_DMADIR;
2774 } 2771 }
2775 2772
2776 2773
2777 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2774 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2778 as ATAPI tape drives don't get this right otherwise */ 2775 as ATAPI tape drives don't get this right otherwise */
2779 return 0; 2776 return 0;
2780 } 2777 }
2781 2778
2782 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2779 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2783 { 2780 {
2784 if (!sata_pmp_attached(ap)) { 2781 if (!sata_pmp_attached(ap)) {
2785 if (likely(devno < ata_link_max_devices(&ap->link))) 2782 if (likely(devno < ata_link_max_devices(&ap->link)))
2786 return &ap->link.device[devno]; 2783 return &ap->link.device[devno];
2787 } else { 2784 } else {
2788 if (likely(devno < ap->nr_pmp_links)) 2785 if (likely(devno < ap->nr_pmp_links))
2789 return &ap->pmp_link[devno].device[0]; 2786 return &ap->pmp_link[devno].device[0];
2790 } 2787 }
2791 2788
2792 return NULL; 2789 return NULL;
2793 } 2790 }
2794 2791
2795 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2792 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2796 const struct scsi_device *scsidev) 2793 const struct scsi_device *scsidev)
2797 { 2794 {
2798 int devno; 2795 int devno;
2799 2796
2800 /* skip commands not addressed to targets we simulate */ 2797 /* skip commands not addressed to targets we simulate */
2801 if (!sata_pmp_attached(ap)) { 2798 if (!sata_pmp_attached(ap)) {
2802 if (unlikely(scsidev->channel || scsidev->lun)) 2799 if (unlikely(scsidev->channel || scsidev->lun))
2803 return NULL; 2800 return NULL;
2804 devno = scsidev->id; 2801 devno = scsidev->id;
2805 } else { 2802 } else {
2806 if (unlikely(scsidev->id || scsidev->lun)) 2803 if (unlikely(scsidev->id || scsidev->lun))
2807 return NULL; 2804 return NULL;
2808 devno = scsidev->channel; 2805 devno = scsidev->channel;
2809 } 2806 }
2810 2807
2811 return ata_find_dev(ap, devno); 2808 return ata_find_dev(ap, devno);
2812 } 2809 }
2813 2810
2814 /** 2811 /**
2815 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2812 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2816 * @ap: ATA port to which the device is attached 2813 * @ap: ATA port to which the device is attached
2817 * @scsidev: SCSI device from which we derive the ATA device 2814 * @scsidev: SCSI device from which we derive the ATA device
2818 * 2815 *
2819 * Given various information provided in struct scsi_cmnd, 2816 * Given various information provided in struct scsi_cmnd,
2820 * map that onto an ATA bus, and using that mapping 2817 * map that onto an ATA bus, and using that mapping
2821 * determine which ata_device is associated with the 2818 * determine which ata_device is associated with the
2822 * SCSI command to be sent. 2819 * SCSI command to be sent.
2823 * 2820 *
2824 * LOCKING: 2821 * LOCKING:
2825 * spin_lock_irqsave(host lock) 2822 * spin_lock_irqsave(host lock)
2826 * 2823 *
2827 * RETURNS: 2824 * RETURNS:
2828 * Associated ATA device, or %NULL if not found. 2825 * Associated ATA device, or %NULL if not found.
2829 */ 2826 */
2830 static struct ata_device * 2827 static struct ata_device *
2831 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2828 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2832 { 2829 {
2833 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2830 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2834 2831
2835 if (unlikely(!dev || !ata_dev_enabled(dev))) 2832 if (unlikely(!dev || !ata_dev_enabled(dev)))
2836 return NULL; 2833 return NULL;
2837 2834
2838 return dev; 2835 return dev;
2839 } 2836 }
2840 2837
2841 /* 2838 /*
2842 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2839 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2843 * @byte1: Byte 1 from pass-thru CDB. 2840 * @byte1: Byte 1 from pass-thru CDB.
2844 * 2841 *
2845 * RETURNS: 2842 * RETURNS:
2846 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2843 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2847 */ 2844 */
2848 static u8 2845 static u8
2849 ata_scsi_map_proto(u8 byte1) 2846 ata_scsi_map_proto(u8 byte1)
2850 { 2847 {
2851 switch((byte1 & 0x1e) >> 1) { 2848 switch((byte1 & 0x1e) >> 1) {
2852 case 3: /* Non-data */ 2849 case 3: /* Non-data */
2853 return ATA_PROT_NODATA; 2850 return ATA_PROT_NODATA;
2854 2851
2855 case 6: /* DMA */ 2852 case 6: /* DMA */
2856 case 10: /* UDMA Data-in */ 2853 case 10: /* UDMA Data-in */
2857 case 11: /* UDMA Data-Out */ 2854 case 11: /* UDMA Data-Out */
2858 return ATA_PROT_DMA; 2855 return ATA_PROT_DMA;
2859 2856
2860 case 4: /* PIO Data-in */ 2857 case 4: /* PIO Data-in */
2861 case 5: /* PIO Data-out */ 2858 case 5: /* PIO Data-out */
2862 return ATA_PROT_PIO; 2859 return ATA_PROT_PIO;
2863 2860
2864 case 0: /* Hard Reset */ 2861 case 0: /* Hard Reset */
2865 case 1: /* SRST */ 2862 case 1: /* SRST */
2866 case 8: /* Device Diagnostic */ 2863 case 8: /* Device Diagnostic */
2867 case 9: /* Device Reset */ 2864 case 9: /* Device Reset */
2868 case 7: /* DMA Queued */ 2865 case 7: /* DMA Queued */
2869 case 12: /* FPDMA */ 2866 case 12: /* FPDMA */
2870 case 15: /* Return Response Info */ 2867 case 15: /* Return Response Info */
2871 default: /* Reserved */ 2868 default: /* Reserved */
2872 break; 2869 break;
2873 } 2870 }
2874 2871
2875 return ATA_PROT_UNKNOWN; 2872 return ATA_PROT_UNKNOWN;
2876 } 2873 }
2877 2874
2878 /** 2875 /**
2879 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2876 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2880 * @qc: command structure to be initialized 2877 * @qc: command structure to be initialized
2881 * 2878 *
2882 * Handles either 12 or 16-byte versions of the CDB. 2879 * Handles either 12 or 16-byte versions of the CDB.
2883 * 2880 *
2884 * RETURNS: 2881 * RETURNS:
2885 * Zero on success, non-zero on failure. 2882 * Zero on success, non-zero on failure.
2886 */ 2883 */
2887 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2884 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2888 { 2885 {
2889 struct ata_taskfile *tf = &(qc->tf); 2886 struct ata_taskfile *tf = &(qc->tf);
2890 struct scsi_cmnd *scmd = qc->scsicmd; 2887 struct scsi_cmnd *scmd = qc->scsicmd;
2891 struct ata_device *dev = qc->dev; 2888 struct ata_device *dev = qc->dev;
2892 const u8 *cdb = scmd->cmnd; 2889 const u8 *cdb = scmd->cmnd;
2893 2890
2894 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) 2891 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2895 goto invalid_fld; 2892 goto invalid_fld;
2896 2893
2897 /* 2894 /*
2898 * 12 and 16 byte CDBs use different offsets to 2895 * 12 and 16 byte CDBs use different offsets to
2899 * provide the various register values. 2896 * provide the various register values.
2900 */ 2897 */
2901 if (cdb[0] == ATA_16) { 2898 if (cdb[0] == ATA_16) {
2902 /* 2899 /*
2903 * 16-byte CDB - may contain extended commands. 2900 * 16-byte CDB - may contain extended commands.
2904 * 2901 *
2905 * If that is the case, copy the upper byte register values. 2902 * If that is the case, copy the upper byte register values.
2906 */ 2903 */
2907 if (cdb[1] & 0x01) { 2904 if (cdb[1] & 0x01) {
2908 tf->hob_feature = cdb[3]; 2905 tf->hob_feature = cdb[3];
2909 tf->hob_nsect = cdb[5]; 2906 tf->hob_nsect = cdb[5];
2910 tf->hob_lbal = cdb[7]; 2907 tf->hob_lbal = cdb[7];
2911 tf->hob_lbam = cdb[9]; 2908 tf->hob_lbam = cdb[9];
2912 tf->hob_lbah = cdb[11]; 2909 tf->hob_lbah = cdb[11];
2913 tf->flags |= ATA_TFLAG_LBA48; 2910 tf->flags |= ATA_TFLAG_LBA48;
2914 } else 2911 } else
2915 tf->flags &= ~ATA_TFLAG_LBA48; 2912 tf->flags &= ~ATA_TFLAG_LBA48;
2916 2913
2917 /* 2914 /*
2918 * Always copy low byte, device and command registers. 2915 * Always copy low byte, device and command registers.
2919 */ 2916 */
2920 tf->feature = cdb[4]; 2917 tf->feature = cdb[4];
2921 tf->nsect = cdb[6]; 2918 tf->nsect = cdb[6];
2922 tf->lbal = cdb[8]; 2919 tf->lbal = cdb[8];
2923 tf->lbam = cdb[10]; 2920 tf->lbam = cdb[10];
2924 tf->lbah = cdb[12]; 2921 tf->lbah = cdb[12];
2925 tf->device = cdb[13]; 2922 tf->device = cdb[13];
2926 tf->command = cdb[14]; 2923 tf->command = cdb[14];
2927 } else { 2924 } else {
2928 /* 2925 /*
2929 * 12-byte CDB - incapable of extended commands. 2926 * 12-byte CDB - incapable of extended commands.
2930 */ 2927 */
2931 tf->flags &= ~ATA_TFLAG_LBA48; 2928 tf->flags &= ~ATA_TFLAG_LBA48;
2932 2929
2933 tf->feature = cdb[3]; 2930 tf->feature = cdb[3];
2934 tf->nsect = cdb[4]; 2931 tf->nsect = cdb[4];
2935 tf->lbal = cdb[5]; 2932 tf->lbal = cdb[5];
2936 tf->lbam = cdb[6]; 2933 tf->lbam = cdb[6];
2937 tf->lbah = cdb[7]; 2934 tf->lbah = cdb[7];
2938 tf->device = cdb[8]; 2935 tf->device = cdb[8];
2939 tf->command = cdb[9]; 2936 tf->command = cdb[9];
2940 } 2937 }
2941 2938
2942 /* enforce correct master/slave bit */ 2939 /* enforce correct master/slave bit */
2943 tf->device = dev->devno ? 2940 tf->device = dev->devno ?
2944 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2941 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2945 2942
2946 switch (tf->command) { 2943 switch (tf->command) {
2947 /* READ/WRITE LONG use a non-standard sect_size */ 2944 /* READ/WRITE LONG use a non-standard sect_size */
2948 case ATA_CMD_READ_LONG: 2945 case ATA_CMD_READ_LONG:
2949 case ATA_CMD_READ_LONG_ONCE: 2946 case ATA_CMD_READ_LONG_ONCE:
2950 case ATA_CMD_WRITE_LONG: 2947 case ATA_CMD_WRITE_LONG:
2951 case ATA_CMD_WRITE_LONG_ONCE: 2948 case ATA_CMD_WRITE_LONG_ONCE:
2952 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) 2949 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2953 goto invalid_fld; 2950 goto invalid_fld;
2954 qc->sect_size = scsi_bufflen(scmd); 2951 qc->sect_size = scsi_bufflen(scmd);
2955 break; 2952 break;
2956 2953
2957 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2954 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2958 case ATA_CMD_CFA_WRITE_NE: 2955 case ATA_CMD_CFA_WRITE_NE:
2959 case ATA_CMD_CFA_TRANS_SECT: 2956 case ATA_CMD_CFA_TRANS_SECT:
2960 case ATA_CMD_CFA_WRITE_MULT_NE: 2957 case ATA_CMD_CFA_WRITE_MULT_NE:
2961 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2958 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2962 case ATA_CMD_READ: 2959 case ATA_CMD_READ:
2963 case ATA_CMD_READ_EXT: 2960 case ATA_CMD_READ_EXT:
2964 case ATA_CMD_READ_QUEUED: 2961 case ATA_CMD_READ_QUEUED:
2965 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2962 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2966 case ATA_CMD_FPDMA_READ: 2963 case ATA_CMD_FPDMA_READ:
2967 case ATA_CMD_READ_MULTI: 2964 case ATA_CMD_READ_MULTI:
2968 case ATA_CMD_READ_MULTI_EXT: 2965 case ATA_CMD_READ_MULTI_EXT:
2969 case ATA_CMD_PIO_READ: 2966 case ATA_CMD_PIO_READ:
2970 case ATA_CMD_PIO_READ_EXT: 2967 case ATA_CMD_PIO_READ_EXT:
2971 case ATA_CMD_READ_STREAM_DMA_EXT: 2968 case ATA_CMD_READ_STREAM_DMA_EXT:
2972 case ATA_CMD_READ_STREAM_EXT: 2969 case ATA_CMD_READ_STREAM_EXT:
2973 case ATA_CMD_VERIFY: 2970 case ATA_CMD_VERIFY:
2974 case ATA_CMD_VERIFY_EXT: 2971 case ATA_CMD_VERIFY_EXT:
2975 case ATA_CMD_WRITE: 2972 case ATA_CMD_WRITE:
2976 case ATA_CMD_WRITE_EXT: 2973 case ATA_CMD_WRITE_EXT:
2977 case ATA_CMD_WRITE_FUA_EXT: 2974 case ATA_CMD_WRITE_FUA_EXT:
2978 case ATA_CMD_WRITE_QUEUED: 2975 case ATA_CMD_WRITE_QUEUED:
2979 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2976 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2980 case ATA_CMD_FPDMA_WRITE: 2977 case ATA_CMD_FPDMA_WRITE:
2981 case ATA_CMD_WRITE_MULTI: 2978 case ATA_CMD_WRITE_MULTI:
2982 case ATA_CMD_WRITE_MULTI_EXT: 2979 case ATA_CMD_WRITE_MULTI_EXT:
2983 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2980 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2984 case ATA_CMD_PIO_WRITE: 2981 case ATA_CMD_PIO_WRITE:
2985 case ATA_CMD_PIO_WRITE_EXT: 2982 case ATA_CMD_PIO_WRITE_EXT:
2986 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2983 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2987 case ATA_CMD_WRITE_STREAM_EXT: 2984 case ATA_CMD_WRITE_STREAM_EXT:
2988 qc->sect_size = scmd->device->sector_size; 2985 qc->sect_size = scmd->device->sector_size;
2989 break; 2986 break;
2990 2987
2991 /* Everything else uses 512 byte "sectors" */ 2988 /* Everything else uses 512 byte "sectors" */
2992 default: 2989 default:
2993 qc->sect_size = ATA_SECT_SIZE; 2990 qc->sect_size = ATA_SECT_SIZE;
2994 } 2991 }
2995 2992
2996 /* 2993 /*
2997 * Set flags so that all registers will be written, pass on 2994 * Set flags so that all registers will be written, pass on
2998 * write indication (used for PIO/DMA setup), result TF is 2995 * write indication (used for PIO/DMA setup), result TF is
2999 * copied back and we don't whine too much about its failure. 2996 * copied back and we don't whine too much about its failure.
3000 */ 2997 */
3001 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2998 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3002 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2999 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3003 tf->flags |= ATA_TFLAG_WRITE; 3000 tf->flags |= ATA_TFLAG_WRITE;
3004 3001
3005 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3002 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3006 3003
3007 /* 3004 /*
3008 * Set transfer length. 3005 * Set transfer length.
3009 * 3006 *
3010 * TODO: find out if we need to do more here to 3007 * TODO: find out if we need to do more here to
3011 * cover scatter/gather case. 3008 * cover scatter/gather case.
3012 */ 3009 */
3013 ata_qc_set_pc_nbytes(qc); 3010 ata_qc_set_pc_nbytes(qc);
3014 3011
3015 /* We may not issue DMA commands if no DMA mode is set */ 3012 /* We may not issue DMA commands if no DMA mode is set */
3016 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) 3013 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3017 goto invalid_fld; 3014 goto invalid_fld;
3018 3015
3019 /* sanity check for pio multi commands */ 3016 /* sanity check for pio multi commands */
3020 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) 3017 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3021 goto invalid_fld; 3018 goto invalid_fld;
3022 3019
3023 if (is_multi_taskfile(tf)) { 3020 if (is_multi_taskfile(tf)) {
3024 unsigned int multi_count = 1 << (cdb[1] >> 5); 3021 unsigned int multi_count = 1 << (cdb[1] >> 5);
3025 3022
3026 /* compare the passed through multi_count 3023 /* compare the passed through multi_count
3027 * with the cached multi_count of libata 3024 * with the cached multi_count of libata
3028 */ 3025 */
3029 if (multi_count != dev->multi_count) 3026 if (multi_count != dev->multi_count)
3030 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3027 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3031 multi_count); 3028 multi_count);
3032 } 3029 }
3033 3030
3034 /* 3031 /*
3035 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3032 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3036 * SET_FEATURES - XFER MODE must be preceded/succeeded 3033 * SET_FEATURES - XFER MODE must be preceded/succeeded
3037 * by an update to hardware-specific registers for each 3034 * by an update to hardware-specific registers for each
3038 * controller (i.e. the reason for ->set_piomode(), 3035 * controller (i.e. the reason for ->set_piomode(),
3039 * ->set_dmamode(), and ->post_set_mode() hooks). 3036 * ->set_dmamode(), and ->post_set_mode() hooks).
3040 */ 3037 */
3041 if (tf->command == ATA_CMD_SET_FEATURES && 3038 if (tf->command == ATA_CMD_SET_FEATURES &&
3042 tf->feature == SETFEATURES_XFER) 3039 tf->feature == SETFEATURES_XFER)
3043 goto invalid_fld; 3040 goto invalid_fld;
3044 3041
3045 /* 3042 /*
3046 * Filter TPM commands by default. These provide an 3043 * Filter TPM commands by default. These provide an
3047 * essentially uncontrolled encrypted "back door" between 3044 * essentially uncontrolled encrypted "back door" between
3048 * applications and the disk. Set libata.allow_tpm=1 if you 3045 * applications and the disk. Set libata.allow_tpm=1 if you
3049 * have a real reason for wanting to use them. This ensures 3046 * have a real reason for wanting to use them. This ensures
3050 * that installed software cannot easily mess stuff up without 3047 * that installed software cannot easily mess stuff up without
3051 * user intent. DVR type users will probably ship with this enabled 3048 * user intent. DVR type users will probably ship with this enabled
3052 * for movie content management. 3049 * for movie content management.
3053 * 3050 *
3054 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3051 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3055 * for this and should do in future but that it is not sufficient as 3052 * for this and should do in future but that it is not sufficient as
3056 * DCS is an optional feature set. Thus we also do the software filter 3053 * DCS is an optional feature set. Thus we also do the software filter
3057 * so that we comply with the TC consortium stated goal that the user 3054 * so that we comply with the TC consortium stated goal that the user
3058 * can turn off TC features of their system. 3055 * can turn off TC features of their system.
3059 */ 3056 */
3060 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) 3057 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3061 goto invalid_fld; 3058 goto invalid_fld;
3062 3059
3063 return 0; 3060 return 0;
3064 3061
3065 invalid_fld: 3062 invalid_fld:
3066 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 3063 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3067 /* "Invalid field in cdb" */ 3064 /* "Invalid field in cdb" */
3068 return 1; 3065 return 1;
3069 } 3066 }
3070 3067
3071 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3068 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3072 { 3069 {
3073 struct ata_taskfile *tf = &qc->tf; 3070 struct ata_taskfile *tf = &qc->tf;
3074 struct scsi_cmnd *scmd = qc->scsicmd; 3071 struct scsi_cmnd *scmd = qc->scsicmd;
3075 struct ata_device *dev = qc->dev; 3072 struct ata_device *dev = qc->dev;
3076 const u8 *cdb = scmd->cmnd; 3073 const u8 *cdb = scmd->cmnd;
3077 u64 block; 3074 u64 block;
3078 u32 n_block; 3075 u32 n_block;
3079 u32 size; 3076 u32 size;
3080 void *buf; 3077 void *buf;
3081 3078
3082 /* we may not issue DMA commands if no DMA mode is set */ 3079 /* we may not issue DMA commands if no DMA mode is set */
3083 if (unlikely(!dev->dma_mode)) 3080 if (unlikely(!dev->dma_mode))
3084 goto invalid_fld; 3081 goto invalid_fld;
3085 3082
3086 if (unlikely(scmd->cmd_len < 16)) 3083 if (unlikely(scmd->cmd_len < 16))
3087 goto invalid_fld; 3084 goto invalid_fld;
3088 scsi_16_lba_len(cdb, &block, &n_block); 3085 scsi_16_lba_len(cdb, &block, &n_block);
3089 3086
3090 /* for now we only support WRITE SAME with the unmap bit set */ 3087 /* for now we only support WRITE SAME with the unmap bit set */
3091 if (unlikely(!(cdb[1] & 0x8))) 3088 if (unlikely(!(cdb[1] & 0x8)))
3092 goto invalid_fld; 3089 goto invalid_fld;
3093 3090
3094 /* 3091 /*
3095 * WRITE SAME always has a sector sized buffer as payload, this 3092 * WRITE SAME always has a sector sized buffer as payload, this
3096 * should never be a multiple entry S/G list. 3093 * should never be a multiple entry S/G list.
3097 */ 3094 */
3098 if (!scsi_sg_count(scmd)) 3095 if (!scsi_sg_count(scmd))
3099 goto invalid_fld; 3096 goto invalid_fld;
3100 3097
3101 buf = page_address(sg_page(scsi_sglist(scmd))); 3098 buf = page_address(sg_page(scsi_sglist(scmd)));
3102 size = ata_set_lba_range_entries(buf, 512, block, n_block); 3099 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3103 3100
3104 tf->protocol = ATA_PROT_DMA; 3101 tf->protocol = ATA_PROT_DMA;
3105 tf->hob_feature = 0; 3102 tf->hob_feature = 0;
3106 tf->feature = ATA_DSM_TRIM; 3103 tf->feature = ATA_DSM_TRIM;
3107 tf->hob_nsect = (size / 512) >> 8; 3104 tf->hob_nsect = (size / 512) >> 8;
3108 tf->nsect = size / 512; 3105 tf->nsect = size / 512;
3109 tf->command = ATA_CMD_DSM; 3106 tf->command = ATA_CMD_DSM;
3110 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3107 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3111 ATA_TFLAG_WRITE; 3108 ATA_TFLAG_WRITE;
3112 3109
3113 ata_qc_set_pc_nbytes(qc); 3110 ata_qc_set_pc_nbytes(qc);
3114 3111
3115 return 0; 3112 return 0;
3116 3113
3117 invalid_fld: 3114 invalid_fld:
3118 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 3115 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3119 /* "Invalid field in cdb" */ 3116 /* "Invalid field in cdb" */
3120 return 1; 3117 return 1;
3121 } 3118 }
3122 3119
3123 /** 3120 /**
3124 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3121 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3125 * @qc: Storage for translated ATA taskfile 3122 * @qc: Storage for translated ATA taskfile
3126 * @buf: input buffer 3123 * @buf: input buffer
3127 * @len: number of valid bytes in the input buffer 3124 * @len: number of valid bytes in the input buffer
3128 * 3125 *
3129 * Prepare a taskfile to modify caching information for the device. 3126 * Prepare a taskfile to modify caching information for the device.
3130 * 3127 *
3131 * LOCKING: 3128 * LOCKING:
3132 * None. 3129 * None.
3133 */ 3130 */
3134 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3131 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3135 const u8 *buf, int len) 3132 const u8 *buf, int len)
3136 { 3133 {
3137 struct ata_taskfile *tf = &qc->tf; 3134 struct ata_taskfile *tf = &qc->tf;
3138 struct ata_device *dev = qc->dev; 3135 struct ata_device *dev = qc->dev;
3139 char mpage[CACHE_MPAGE_LEN]; 3136 char mpage[CACHE_MPAGE_LEN];
3140 u8 wce; 3137 u8 wce;
3141 3138
3142 /* 3139 /*
3143 * The first two bytes of def_cache_mpage are a header, so offsets 3140 * The first two bytes of def_cache_mpage are a header, so offsets
3144 * in mpage are off by 2 compared to buf. Same for len. 3141 * in mpage are off by 2 compared to buf. Same for len.
3145 */ 3142 */
3146 3143
3147 if (len != CACHE_MPAGE_LEN - 2) 3144 if (len != CACHE_MPAGE_LEN - 2)
3148 return -EINVAL; 3145 return -EINVAL;
3149 3146
3150 wce = buf[0] & (1 << 2); 3147 wce = buf[0] & (1 << 2);
3151 3148
3152 /* 3149 /*
3153 * Check that read-only bits are not modified. 3150 * Check that read-only bits are not modified.
3154 */ 3151 */
3155 ata_msense_caching(dev->id, mpage, false); 3152 ata_msense_caching(dev->id, mpage, false);
3156 mpage[2] &= ~(1 << 2); 3153 mpage[2] &= ~(1 << 2);
3157 mpage[2] |= wce; 3154 mpage[2] |= wce;
3158 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0) 3155 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3159 return -EINVAL; 3156 return -EINVAL;
3160 3157
3161 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3158 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3162 tf->protocol = ATA_PROT_NODATA; 3159 tf->protocol = ATA_PROT_NODATA;
3163 tf->nsect = 0; 3160 tf->nsect = 0;
3164 tf->command = ATA_CMD_SET_FEATURES; 3161 tf->command = ATA_CMD_SET_FEATURES;
3165 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3162 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3166 return 0; 3163 return 0;
3167 } 3164 }
3168 3165
3169 /** 3166 /**
3170 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3167 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3171 * @qc: Storage for translated ATA taskfile 3168 * @qc: Storage for translated ATA taskfile
3172 * 3169 *
3173 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3170 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3174 * Assume this is invoked for direct access devices (e.g. disks) only. 3171 * Assume this is invoked for direct access devices (e.g. disks) only.
3175 * There should be no block descriptor for other device types. 3172 * There should be no block descriptor for other device types.
3176 * 3173 *
3177 * LOCKING: 3174 * LOCKING:
3178 * spin_lock_irqsave(host lock) 3175 * spin_lock_irqsave(host lock)
3179 */ 3176 */
3180 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3177 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3181 { 3178 {
3182 struct scsi_cmnd *scmd = qc->scsicmd; 3179 struct scsi_cmnd *scmd = qc->scsicmd;
3183 const u8 *cdb = scmd->cmnd; 3180 const u8 *cdb = scmd->cmnd;
3184 const u8 *p; 3181 const u8 *p;
3185 u8 pg, spg; 3182 u8 pg, spg;
3186 unsigned six_byte, pg_len, hdr_len, bd_len; 3183 unsigned six_byte, pg_len, hdr_len, bd_len;
3187 int len; 3184 int len;
3188 3185
3189 VPRINTK("ENTER\n"); 3186 VPRINTK("ENTER\n");
3190 3187
3191 six_byte = (cdb[0] == MODE_SELECT); 3188 six_byte = (cdb[0] == MODE_SELECT);
3192 if (six_byte) { 3189 if (six_byte) {
3193 if (scmd->cmd_len < 5) 3190 if (scmd->cmd_len < 5)
3194 goto invalid_fld; 3191 goto invalid_fld;
3195 3192
3196 len = cdb[4]; 3193 len = cdb[4];
3197 hdr_len = 4; 3194 hdr_len = 4;
3198 } else { 3195 } else {
3199 if (scmd->cmd_len < 9) 3196 if (scmd->cmd_len < 9)
3200 goto invalid_fld; 3197 goto invalid_fld;
3201 3198
3202 len = (cdb[7] << 8) + cdb[8]; 3199 len = (cdb[7] << 8) + cdb[8];
3203 hdr_len = 8; 3200 hdr_len = 8;
3204 } 3201 }
3205 3202
3206 /* We only support PF=1, SP=0. */ 3203 /* We only support PF=1, SP=0. */
3207 if ((cdb[1] & 0x11) != 0x10) 3204 if ((cdb[1] & 0x11) != 0x10)
3208 goto invalid_fld; 3205 goto invalid_fld;
3209 3206
3210 /* Test early for possible overrun. */ 3207 /* Test early for possible overrun. */
3211 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3208 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3212 goto invalid_param_len; 3209 goto invalid_param_len;
3213 3210
3214 p = page_address(sg_page(scsi_sglist(scmd))); 3211 p = page_address(sg_page(scsi_sglist(scmd)));
3215 3212
3216 /* Move past header and block descriptors. */ 3213 /* Move past header and block descriptors. */
3217 if (len < hdr_len) 3214 if (len < hdr_len)
3218 goto invalid_param_len; 3215 goto invalid_param_len;
3219 3216
3220 if (six_byte) 3217 if (six_byte)
3221 bd_len = p[3]; 3218 bd_len = p[3];
3222 else 3219 else
3223 bd_len = (p[6] << 8) + p[7]; 3220 bd_len = (p[6] << 8) + p[7];
3224 3221
3225 len -= hdr_len; 3222 len -= hdr_len;
3226 p += hdr_len; 3223 p += hdr_len;
3227 if (len < bd_len) 3224 if (len < bd_len)
3228 goto invalid_param_len; 3225 goto invalid_param_len;
3229 if (bd_len != 0 && bd_len != 8) 3226 if (bd_len != 0 && bd_len != 8)
3230 goto invalid_param; 3227 goto invalid_param;
3231 3228
3232 len -= bd_len; 3229 len -= bd_len;
3233 p += bd_len; 3230 p += bd_len;
3234 if (len == 0) 3231 if (len == 0)
3235 goto skip; 3232 goto skip;
3236 3233
3237 /* Parse both possible formats for the mode page headers. */ 3234 /* Parse both possible formats for the mode page headers. */
3238 pg = p[0] & 0x3f; 3235 pg = p[0] & 0x3f;
3239 if (p[0] & 0x40) { 3236 if (p[0] & 0x40) {
3240 if (len < 4) 3237 if (len < 4)
3241 goto invalid_param_len; 3238 goto invalid_param_len;
3242 3239
3243 spg = p[1]; 3240 spg = p[1];
3244 pg_len = (p[2] << 8) | p[3]; 3241 pg_len = (p[2] << 8) | p[3];
3245 p += 4; 3242 p += 4;
3246 len -= 4; 3243 len -= 4;
3247 } else { 3244 } else {
3248 if (len < 2) 3245 if (len < 2)
3249 goto invalid_param_len; 3246 goto invalid_param_len;
3250 3247
3251 spg = 0; 3248 spg = 0;
3252 pg_len = p[1]; 3249 pg_len = p[1];
3253 p += 2; 3250 p += 2;
3254 len -= 2; 3251 len -= 2;
3255 } 3252 }
3256 3253
3257 /* 3254 /*
3258 * No mode subpages supported (yet) but asking for _all_ 3255 * No mode subpages supported (yet) but asking for _all_
3259 * subpages may be valid 3256 * subpages may be valid
3260 */ 3257 */
3261 if (spg && (spg != ALL_SUB_MPAGES)) 3258 if (spg && (spg != ALL_SUB_MPAGES))
3262 goto invalid_param; 3259 goto invalid_param;
3263 if (pg_len > len) 3260 if (pg_len > len)
3264 goto invalid_param_len; 3261 goto invalid_param_len;
3265 3262
3266 switch (pg) { 3263 switch (pg) {
3267 case CACHE_MPAGE: 3264 case CACHE_MPAGE:
3268 if (ata_mselect_caching(qc, p, pg_len) < 0) 3265 if (ata_mselect_caching(qc, p, pg_len) < 0)
3269 goto invalid_param; 3266 goto invalid_param;
3270 break; 3267 break;
3271 3268
3272 default: /* invalid page code */ 3269 default: /* invalid page code */
3273 goto invalid_param; 3270 goto invalid_param;
3274 } 3271 }
3275 3272
3276 /* 3273 /*
3277 * Only one page has changeable data, so we only support setting one 3274 * Only one page has changeable data, so we only support setting one
3278 * page at a time. 3275 * page at a time.
3279 */ 3276 */
3280 if (len > pg_len) 3277 if (len > pg_len)
3281 goto invalid_param; 3278 goto invalid_param;
3282 3279
3283 return 0; 3280 return 0;
3284 3281
3285 invalid_fld: 3282 invalid_fld:
3286 /* "Invalid field in CDB" */ 3283 /* "Invalid field in CDB" */
3287 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 3284 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3288 return 1; 3285 return 1;
3289 3286
3290 invalid_param: 3287 invalid_param:
3291 /* "Invalid field in parameter list" */ 3288 /* "Invalid field in parameter list" */
3292 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0); 3289 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3293 return 1; 3290 return 1;
3294 3291
3295 invalid_param_len: 3292 invalid_param_len:
3296 /* "Parameter list length error" */ 3293 /* "Parameter list length error" */
3297 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3294 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3298 return 1; 3295 return 1;
3299 3296
3300 skip: 3297 skip:
3301 scmd->result = SAM_STAT_GOOD; 3298 scmd->result = SAM_STAT_GOOD;
3302 return 1; 3299 return 1;
3303 } 3300 }
3304 3301
3305 /** 3302 /**
3306 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3303 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3307 * @dev: ATA device 3304 * @dev: ATA device
3308 * @cmd: SCSI command opcode to consider 3305 * @cmd: SCSI command opcode to consider
3309 * 3306 *
3310 * Look up the SCSI command given, and determine whether the 3307 * Look up the SCSI command given, and determine whether the
3311 * SCSI command is to be translated or simulated. 3308 * SCSI command is to be translated or simulated.
3312 * 3309 *
3313 * RETURNS: 3310 * RETURNS:
3314 * Pointer to translation function if possible, %NULL if not. 3311 * Pointer to translation function if possible, %NULL if not.
3315 */ 3312 */
3316 3313
3317 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3314 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3318 { 3315 {
3319 switch (cmd) { 3316 switch (cmd) {
3320 case READ_6: 3317 case READ_6:
3321 case READ_10: 3318 case READ_10:
3322 case READ_16: 3319 case READ_16:
3323 3320
3324 case WRITE_6: 3321 case WRITE_6:
3325 case WRITE_10: 3322 case WRITE_10:
3326 case WRITE_16: 3323 case WRITE_16:
3327 return ata_scsi_rw_xlat; 3324 return ata_scsi_rw_xlat;
3328 3325
3329 case WRITE_SAME_16: 3326 case WRITE_SAME_16:
3330 return ata_scsi_write_same_xlat; 3327 return ata_scsi_write_same_xlat;
3331 3328
3332 case SYNCHRONIZE_CACHE: 3329 case SYNCHRONIZE_CACHE:
3333 if (ata_try_flush_cache(dev)) 3330 if (ata_try_flush_cache(dev))
3334 return ata_scsi_flush_xlat; 3331 return ata_scsi_flush_xlat;
3335 break; 3332 break;
3336 3333
3337 case VERIFY: 3334 case VERIFY:
3338 case VERIFY_16: 3335 case VERIFY_16:
3339 return ata_scsi_verify_xlat; 3336 return ata_scsi_verify_xlat;
3340 3337
3341 case ATA_12: 3338 case ATA_12:
3342 case ATA_16: 3339 case ATA_16:
3343 return ata_scsi_pass_thru; 3340 return ata_scsi_pass_thru;
3344 3341
3345 case MODE_SELECT: 3342 case MODE_SELECT:
3346 case MODE_SELECT_10: 3343 case MODE_SELECT_10:
3347 return ata_scsi_mode_select_xlat; 3344 return ata_scsi_mode_select_xlat;
3348 break; 3345 break;
3349 3346
3350 case START_STOP: 3347 case START_STOP:
3351 return ata_scsi_start_stop_xlat; 3348 return ata_scsi_start_stop_xlat;
3352 } 3349 }
3353 3350
3354 return NULL; 3351 return NULL;
3355 } 3352 }
3356 3353
3357 /** 3354 /**
3358 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3355 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3359 * @ap: ATA port to which the command was being sent 3356 * @ap: ATA port to which the command was being sent
3360 * @cmd: SCSI command to dump 3357 * @cmd: SCSI command to dump
3361 * 3358 *
3362 * Prints the contents of a SCSI command via printk(). 3359 * Prints the contents of a SCSI command via printk().
3363 */ 3360 */
3364 3361
3365 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3362 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3366 struct scsi_cmnd *cmd) 3363 struct scsi_cmnd *cmd)
3367 { 3364 {
3368 #ifdef ATA_DEBUG 3365 #ifdef ATA_DEBUG
3369 struct scsi_device *scsidev = cmd->device; 3366 struct scsi_device *scsidev = cmd->device;
3370 u8 *scsicmd = cmd->cmnd; 3367 u8 *scsicmd = cmd->cmnd;
3371 3368
3372 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 3369 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3373 ap->print_id, 3370 ap->print_id,
3374 scsidev->channel, scsidev->id, scsidev->lun, 3371 scsidev->channel, scsidev->id, scsidev->lun,
3375 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], 3372 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3376 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], 3373 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3377 scsicmd[8]); 3374 scsicmd[8]);
3378 #endif 3375 #endif
3379 } 3376 }
3380 3377
3381 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3378 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3382 struct ata_device *dev) 3379 struct ata_device *dev)
3383 { 3380 {
3384 u8 scsi_op = scmd->cmnd[0]; 3381 u8 scsi_op = scmd->cmnd[0];
3385 ata_xlat_func_t xlat_func; 3382 ata_xlat_func_t xlat_func;
3386 int rc = 0; 3383 int rc = 0;
3387 3384
3388 if (dev->class == ATA_DEV_ATA) { 3385 if (dev->class == ATA_DEV_ATA) {
3389 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3386 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3390 goto bad_cdb_len; 3387 goto bad_cdb_len;
3391 3388
3392 xlat_func = ata_get_xlat_func(dev, scsi_op); 3389 xlat_func = ata_get_xlat_func(dev, scsi_op);
3393 } else { 3390 } else {
3394 if (unlikely(!scmd->cmd_len)) 3391 if (unlikely(!scmd->cmd_len))
3395 goto bad_cdb_len; 3392 goto bad_cdb_len;
3396 3393
3397 xlat_func = NULL; 3394 xlat_func = NULL;
3398 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3395 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3399 /* relay SCSI command to ATAPI device */ 3396 /* relay SCSI command to ATAPI device */
3400 int len = COMMAND_SIZE(scsi_op); 3397 int len = COMMAND_SIZE(scsi_op);
3401 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3398 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3402 goto bad_cdb_len; 3399 goto bad_cdb_len;
3403 3400
3404 xlat_func = atapi_xlat; 3401 xlat_func = atapi_xlat;
3405 } else { 3402 } else {
3406 /* ATA_16 passthru, treat as an ATA command */ 3403 /* ATA_16 passthru, treat as an ATA command */
3407 if (unlikely(scmd->cmd_len > 16)) 3404 if (unlikely(scmd->cmd_len > 16))
3408 goto bad_cdb_len; 3405 goto bad_cdb_len;
3409 3406
3410 xlat_func = ata_get_xlat_func(dev, scsi_op); 3407 xlat_func = ata_get_xlat_func(dev, scsi_op);
3411 } 3408 }
3412 } 3409 }
3413 3410
3414 if (xlat_func) 3411 if (xlat_func)
3415 rc = ata_scsi_translate(dev, scmd, xlat_func); 3412 rc = ata_scsi_translate(dev, scmd, xlat_func);
3416 else 3413 else
3417 ata_scsi_simulate(dev, scmd); 3414 ata_scsi_simulate(dev, scmd);
3418 3415
3419 return rc; 3416 return rc;
3420 3417
3421 bad_cdb_len: 3418 bad_cdb_len:
3422 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3419 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3423 scmd->cmd_len, scsi_op, dev->cdb_len); 3420 scmd->cmd_len, scsi_op, dev->cdb_len);
3424 scmd->result = DID_ERROR << 16; 3421 scmd->result = DID_ERROR << 16;
3425 scmd->scsi_done(scmd); 3422 scmd->scsi_done(scmd);
3426 return 0; 3423 return 0;
3427 } 3424 }
3428 3425
3429 /** 3426 /**
3430 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3427 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3431 * @shost: SCSI host of command to be sent 3428 * @shost: SCSI host of command to be sent
3432 * @cmd: SCSI command to be sent 3429 * @cmd: SCSI command to be sent
3433 * 3430 *
3434 * In some cases, this function translates SCSI commands into 3431 * In some cases, this function translates SCSI commands into
3435 * ATA taskfiles, and queues the taskfiles to be sent to 3432 * ATA taskfiles, and queues the taskfiles to be sent to
3436 * hardware. In other cases, this function simulates a 3433 * hardware. In other cases, this function simulates a
3437 * SCSI device by evaluating and responding to certain 3434 * SCSI device by evaluating and responding to certain
3438 * SCSI commands. This creates the overall effect of 3435 * SCSI commands. This creates the overall effect of
3439 * ATA and ATAPI devices appearing as SCSI devices. 3436 * ATA and ATAPI devices appearing as SCSI devices.
3440 * 3437 *
3441 * LOCKING: 3438 * LOCKING:
3442 * ATA host lock 3439 * ATA host lock
3443 * 3440 *
3444 * RETURNS: 3441 * RETURNS:
3445 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3442 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3446 * 0 otherwise. 3443 * 0 otherwise.
3447 */ 3444 */
3448 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 3445 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3449 { 3446 {
3450 struct ata_port *ap; 3447 struct ata_port *ap;
3451 struct ata_device *dev; 3448 struct ata_device *dev;
3452 struct scsi_device *scsidev = cmd->device; 3449 struct scsi_device *scsidev = cmd->device;
3453 int rc = 0; 3450 int rc = 0;
3454 unsigned long irq_flags; 3451 unsigned long irq_flags;
3455 3452
3456 ap = ata_shost_to_port(shost); 3453 ap = ata_shost_to_port(shost);
3457 3454
3458 spin_lock_irqsave(ap->lock, irq_flags); 3455 spin_lock_irqsave(ap->lock, irq_flags);
3459 3456
3460 ata_scsi_dump_cdb(ap, cmd); 3457 ata_scsi_dump_cdb(ap, cmd);
3461 3458
3462 dev = ata_scsi_find_dev(ap, scsidev); 3459 dev = ata_scsi_find_dev(ap, scsidev);
3463 if (likely(dev)) 3460 if (likely(dev))
3464 rc = __ata_scsi_queuecmd(cmd, dev); 3461 rc = __ata_scsi_queuecmd(cmd, dev);
3465 else { 3462 else {
3466 cmd->result = (DID_BAD_TARGET << 16); 3463 cmd->result = (DID_BAD_TARGET << 16);
3467 cmd->scsi_done(cmd); 3464 cmd->scsi_done(cmd);
3468 } 3465 }
3469 3466
3470 spin_unlock_irqrestore(ap->lock, irq_flags); 3467 spin_unlock_irqrestore(ap->lock, irq_flags);
3471 3468
3472 return rc; 3469 return rc;
3473 } 3470 }
3474 3471
3475 /** 3472 /**
3476 * ata_scsi_simulate - simulate SCSI command on ATA device 3473 * ata_scsi_simulate - simulate SCSI command on ATA device
3477 * @dev: the target device 3474 * @dev: the target device
3478 * @cmd: SCSI command being sent to device. 3475 * @cmd: SCSI command being sent to device.
3479 * 3476 *
3480 * Interprets and directly executes a select list of SCSI commands 3477 * Interprets and directly executes a select list of SCSI commands
3481 * that can be handled internally. 3478 * that can be handled internally.
3482 * 3479 *
3483 * LOCKING: 3480 * LOCKING:
3484 * spin_lock_irqsave(host lock) 3481 * spin_lock_irqsave(host lock)
3485 */ 3482 */
3486 3483
3487 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 3484 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3488 { 3485 {
3489 struct ata_scsi_args args; 3486 struct ata_scsi_args args;
3490 const u8 *scsicmd = cmd->cmnd; 3487 const u8 *scsicmd = cmd->cmnd;
3491 u8 tmp8; 3488 u8 tmp8;
3492 3489
3493 args.dev = dev; 3490 args.dev = dev;
3494 args.id = dev->id; 3491 args.id = dev->id;
3495 args.cmd = cmd; 3492 args.cmd = cmd;
3496 args.done = cmd->scsi_done; 3493 args.done = cmd->scsi_done;
3497 3494
3498 switch(scsicmd[0]) { 3495 switch(scsicmd[0]) {
3499 /* TODO: worth improving? */ 3496 /* TODO: worth improving? */
3500 case FORMAT_UNIT: 3497 case FORMAT_UNIT:
3501 ata_scsi_invalid_field(cmd); 3498 ata_scsi_invalid_field(cmd);
3502 break; 3499 break;
3503 3500
3504 case INQUIRY: 3501 case INQUIRY:
3505 if (scsicmd[1] & 2) /* is CmdDt set? */ 3502 if (scsicmd[1] & 2) /* is CmdDt set? */
3506 ata_scsi_invalid_field(cmd); 3503 ata_scsi_invalid_field(cmd);
3507 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 3504 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3508 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 3505 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3509 else switch (scsicmd[2]) { 3506 else switch (scsicmd[2]) {
3510 case 0x00: 3507 case 0x00:
3511 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 3508 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3512 break; 3509 break;
3513 case 0x80: 3510 case 0x80:
3514 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 3511 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3515 break; 3512 break;
3516 case 0x83: 3513 case 0x83:
3517 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 3514 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3518 break; 3515 break;
3519 case 0x89: 3516 case 0x89:
3520 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 3517 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3521 break; 3518 break;
3522 case 0xb0: 3519 case 0xb0:
3523 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 3520 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3524 break; 3521 break;
3525 case 0xb1: 3522 case 0xb1:
3526 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 3523 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3527 break; 3524 break;
3528 case 0xb2: 3525 case 0xb2:
3529 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 3526 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3530 break; 3527 break;
3531 default: 3528 default:
3532 ata_scsi_invalid_field(cmd); 3529 ata_scsi_invalid_field(cmd);
3533 break; 3530 break;
3534 } 3531 }
3535 break; 3532 break;
3536 3533
3537 case MODE_SENSE: 3534 case MODE_SENSE:
3538 case MODE_SENSE_10: 3535 case MODE_SENSE_10:
3539 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 3536 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3540 break; 3537 break;
3541 3538
3542 case READ_CAPACITY: 3539 case READ_CAPACITY:
3543 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3540 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3544 break; 3541 break;
3545 3542
3546 case SERVICE_ACTION_IN: 3543 case SERVICE_ACTION_IN:
3547 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 3544 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3548 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3545 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3549 else 3546 else
3550 ata_scsi_invalid_field(cmd); 3547 ata_scsi_invalid_field(cmd);
3551 break; 3548 break;
3552 3549
3553 case REPORT_LUNS: 3550 case REPORT_LUNS:
3554 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 3551 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3555 break; 3552 break;
3556 3553
3557 case REQUEST_SENSE: 3554 case REQUEST_SENSE:
3558 ata_scsi_set_sense(cmd, 0, 0, 0); 3555 ata_scsi_set_sense(cmd, 0, 0, 0);
3559 cmd->result = (DRIVER_SENSE << 24); 3556 cmd->result = (DRIVER_SENSE << 24);
3560 cmd->scsi_done(cmd); 3557 cmd->scsi_done(cmd);
3561 break; 3558 break;
3562 3559
3563 /* if we reach this, then writeback caching is disabled, 3560 /* if we reach this, then writeback caching is disabled,
3564 * turning this into a no-op. 3561 * turning this into a no-op.
3565 */ 3562 */
3566 case SYNCHRONIZE_CACHE: 3563 case SYNCHRONIZE_CACHE:
3567 /* fall through */ 3564 /* fall through */
3568 3565
3569 /* no-op's, complete with success */ 3566 /* no-op's, complete with success */
3570 case REZERO_UNIT: 3567 case REZERO_UNIT:
3571 case SEEK_6: 3568 case SEEK_6:
3572 case SEEK_10: 3569 case SEEK_10:
3573 case TEST_UNIT_READY: 3570 case TEST_UNIT_READY:
3574 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3571 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3575 break; 3572 break;
3576 3573
3577 case SEND_DIAGNOSTIC: 3574 case SEND_DIAGNOSTIC:
3578 tmp8 = scsicmd[1] & ~(1 << 3); 3575 tmp8 = scsicmd[1] & ~(1 << 3);
3579 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 3576 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3580 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3577 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3581 else 3578 else
3582 ata_scsi_invalid_field(cmd); 3579 ata_scsi_invalid_field(cmd);
3583 break; 3580 break;
3584 3581
3585 /* all other commands */ 3582 /* all other commands */
3586 default: 3583 default:
3587 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); 3584 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3588 /* "Invalid command operation code" */ 3585 /* "Invalid command operation code" */
3589 cmd->scsi_done(cmd); 3586 cmd->scsi_done(cmd);
3590 break; 3587 break;
3591 } 3588 }
3592 } 3589 }
3593 3590
3594 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 3591 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3595 { 3592 {
3596 int i, rc; 3593 int i, rc;
3597 3594
3598 for (i = 0; i < host->n_ports; i++) { 3595 for (i = 0; i < host->n_ports; i++) {
3599 struct ata_port *ap = host->ports[i]; 3596 struct ata_port *ap = host->ports[i];
3600 struct Scsi_Host *shost; 3597 struct Scsi_Host *shost;
3601 3598
3602 rc = -ENOMEM; 3599 rc = -ENOMEM;
3603 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 3600 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3604 if (!shost) 3601 if (!shost)
3605 goto err_alloc; 3602 goto err_alloc;
3606 3603
3607 shost->eh_noresume = 1; 3604 shost->eh_noresume = 1;
3608 *(struct ata_port **)&shost->hostdata[0] = ap; 3605 *(struct ata_port **)&shost->hostdata[0] = ap;
3609 ap->scsi_host = shost; 3606 ap->scsi_host = shost;
3610 3607
3611 shost->transportt = ata_scsi_transport_template; 3608 shost->transportt = ata_scsi_transport_template;
3612 shost->unique_id = ap->print_id; 3609 shost->unique_id = ap->print_id;
3613 shost->max_id = 16; 3610 shost->max_id = 16;
3614 shost->max_lun = 1; 3611 shost->max_lun = 1;
3615 shost->max_channel = 1; 3612 shost->max_channel = 1;
3616 shost->max_cmd_len = 16; 3613 shost->max_cmd_len = 16;
3617 3614
3618 /* Schedule policy is determined by ->qc_defer() 3615 /* Schedule policy is determined by ->qc_defer()
3619 * callback and it needs to see every deferred qc. 3616 * callback and it needs to see every deferred qc.
3620 * Set host_blocked to 1 to prevent SCSI midlayer from 3617 * Set host_blocked to 1 to prevent SCSI midlayer from
3621 * automatically deferring requests. 3618 * automatically deferring requests.
3622 */ 3619 */
3623 shost->max_host_blocked = 1; 3620 shost->max_host_blocked = 1;
3624 3621
3625 rc = scsi_add_host_with_dma(ap->scsi_host, 3622 rc = scsi_add_host_with_dma(ap->scsi_host,
3626 &ap->tdev, ap->host->dev); 3623 &ap->tdev, ap->host->dev);
3627 if (rc) 3624 if (rc)
3628 goto err_add; 3625 goto err_add;
3629 } 3626 }
3630 3627
3631 return 0; 3628 return 0;
3632 3629
3633 err_add: 3630 err_add:
3634 scsi_host_put(host->ports[i]->scsi_host); 3631 scsi_host_put(host->ports[i]->scsi_host);
3635 err_alloc: 3632 err_alloc:
3636 while (--i >= 0) { 3633 while (--i >= 0) {
3637 struct Scsi_Host *shost = host->ports[i]->scsi_host; 3634 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3638 3635
3639 scsi_remove_host(shost); 3636 scsi_remove_host(shost);
3640 scsi_host_put(shost); 3637 scsi_host_put(shost);
3641 } 3638 }
3642 return rc; 3639 return rc;
3643 } 3640 }
3644 3641
3645 void ata_scsi_scan_host(struct ata_port *ap, int sync) 3642 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3646 { 3643 {
3647 int tries = 5; 3644 int tries = 5;
3648 struct ata_device *last_failed_dev = NULL; 3645 struct ata_device *last_failed_dev = NULL;
3649 struct ata_link *link; 3646 struct ata_link *link;
3650 struct ata_device *dev; 3647 struct ata_device *dev;
3651 3648
3652 repeat: 3649 repeat:
3653 ata_for_each_link(link, ap, EDGE) { 3650 ata_for_each_link(link, ap, EDGE) {
3654 ata_for_each_dev(dev, link, ENABLED) { 3651 ata_for_each_dev(dev, link, ENABLED) {
3655 struct scsi_device *sdev; 3652 struct scsi_device *sdev;
3656 int channel = 0, id = 0; 3653 int channel = 0, id = 0;
3657 3654
3658 if (dev->sdev) 3655 if (dev->sdev)
3659 continue; 3656 continue;
3660 3657
3661 if (ata_is_host_link(link)) 3658 if (ata_is_host_link(link))
3662 id = dev->devno; 3659 id = dev->devno;
3663 else 3660 else
3664 channel = link->pmp; 3661 channel = link->pmp;
3665 3662
3666 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 3663 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3667 NULL); 3664 NULL);
3668 if (!IS_ERR(sdev)) { 3665 if (!IS_ERR(sdev)) {
3669 dev->sdev = sdev; 3666 dev->sdev = sdev;
3670 scsi_device_put(sdev); 3667 scsi_device_put(sdev);
3671 if (zpodd_dev_enabled(dev)) 3668 if (zpodd_dev_enabled(dev))
3672 dev_pm_qos_expose_flags( 3669 dev_pm_qos_expose_flags(
3673 &sdev->sdev_gendev, 0); 3670 &sdev->sdev_gendev, 0);
3674 } else { 3671 } else {
3675 dev->sdev = NULL; 3672 dev->sdev = NULL;
3676 } 3673 }
3677 } 3674 }
3678 } 3675 }
3679 3676
3680 /* If we scanned while EH was in progress or allocation 3677 /* If we scanned while EH was in progress or allocation
3681 * failure occurred, scan would have failed silently. Check 3678 * failure occurred, scan would have failed silently. Check
3682 * whether all devices are attached. 3679 * whether all devices are attached.
3683 */ 3680 */
3684 ata_for_each_link(link, ap, EDGE) { 3681 ata_for_each_link(link, ap, EDGE) {
3685 ata_for_each_dev(dev, link, ENABLED) { 3682 ata_for_each_dev(dev, link, ENABLED) {
3686 if (!dev->sdev) 3683 if (!dev->sdev)
3687 goto exit_loop; 3684 goto exit_loop;
3688 } 3685 }
3689 } 3686 }
3690 exit_loop: 3687 exit_loop:
3691 if (!link) 3688 if (!link)
3692 return; 3689 return;
3693 3690
3694 /* we're missing some SCSI devices */ 3691 /* we're missing some SCSI devices */
3695 if (sync) { 3692 if (sync) {
3696 /* If caller requested synchrnous scan && we've made 3693 /* If caller requested synchrnous scan && we've made
3697 * any progress, sleep briefly and repeat. 3694 * any progress, sleep briefly and repeat.
3698 */ 3695 */
3699 if (dev != last_failed_dev) { 3696 if (dev != last_failed_dev) {
3700 msleep(100); 3697 msleep(100);
3701 last_failed_dev = dev; 3698 last_failed_dev = dev;
3702 goto repeat; 3699 goto repeat;
3703 } 3700 }
3704 3701
3705 /* We might be failing to detect boot device, give it 3702 /* We might be failing to detect boot device, give it
3706 * a few more chances. 3703 * a few more chances.
3707 */ 3704 */
3708 if (--tries) { 3705 if (--tries) {
3709 msleep(100); 3706 msleep(100);
3710 goto repeat; 3707 goto repeat;
3711 } 3708 }
3712 3709
3713 ata_port_err(ap, 3710 ata_port_err(ap,
3714 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 3711 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3715 } 3712 }
3716 3713
3717 queue_delayed_work(system_long_wq, &ap->hotplug_task, 3714 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3718 round_jiffies_relative(HZ)); 3715 round_jiffies_relative(HZ));
3719 } 3716 }
3720 3717
3721 /** 3718 /**
3722 * ata_scsi_offline_dev - offline attached SCSI device 3719 * ata_scsi_offline_dev - offline attached SCSI device
3723 * @dev: ATA device to offline attached SCSI device for 3720 * @dev: ATA device to offline attached SCSI device for
3724 * 3721 *
3725 * This function is called from ata_eh_hotplug() and responsible 3722 * This function is called from ata_eh_hotplug() and responsible
3726 * for taking the SCSI device attached to @dev offline. This 3723 * for taking the SCSI device attached to @dev offline. This
3727 * function is called with host lock which protects dev->sdev 3724 * function is called with host lock which protects dev->sdev
3728 * against clearing. 3725 * against clearing.
3729 * 3726 *
3730 * LOCKING: 3727 * LOCKING:
3731 * spin_lock_irqsave(host lock) 3728 * spin_lock_irqsave(host lock)
3732 * 3729 *
3733 * RETURNS: 3730 * RETURNS:
3734 * 1 if attached SCSI device exists, 0 otherwise. 3731 * 1 if attached SCSI device exists, 0 otherwise.
3735 */ 3732 */
3736 int ata_scsi_offline_dev(struct ata_device *dev) 3733 int ata_scsi_offline_dev(struct ata_device *dev)
3737 { 3734 {
3738 if (dev->sdev) { 3735 if (dev->sdev) {
3739 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 3736 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3740 return 1; 3737 return 1;
3741 } 3738 }
3742 return 0; 3739 return 0;
3743 } 3740 }
3744 3741
3745 /** 3742 /**
3746 * ata_scsi_remove_dev - remove attached SCSI device 3743 * ata_scsi_remove_dev - remove attached SCSI device
3747 * @dev: ATA device to remove attached SCSI device for 3744 * @dev: ATA device to remove attached SCSI device for
3748 * 3745 *
3749 * This function is called from ata_eh_scsi_hotplug() and 3746 * This function is called from ata_eh_scsi_hotplug() and
3750 * responsible for removing the SCSI device attached to @dev. 3747 * responsible for removing the SCSI device attached to @dev.
3751 * 3748 *
3752 * LOCKING: 3749 * LOCKING:
3753 * Kernel thread context (may sleep). 3750 * Kernel thread context (may sleep).
3754 */ 3751 */
3755 static void ata_scsi_remove_dev(struct ata_device *dev) 3752 static void ata_scsi_remove_dev(struct ata_device *dev)
3756 { 3753 {
3757 struct ata_port *ap = dev->link->ap; 3754 struct ata_port *ap = dev->link->ap;
3758 struct scsi_device *sdev; 3755 struct scsi_device *sdev;
3759 unsigned long flags; 3756 unsigned long flags;
3760 3757
3761 /* Alas, we need to grab scan_mutex to ensure SCSI device 3758 /* Alas, we need to grab scan_mutex to ensure SCSI device
3762 * state doesn't change underneath us and thus 3759 * state doesn't change underneath us and thus
3763 * scsi_device_get() always succeeds. The mutex locking can 3760 * scsi_device_get() always succeeds. The mutex locking can
3764 * be removed if there is __scsi_device_get() interface which 3761 * be removed if there is __scsi_device_get() interface which
3765 * increments reference counts regardless of device state. 3762 * increments reference counts regardless of device state.
3766 */ 3763 */
3767 mutex_lock(&ap->scsi_host->scan_mutex); 3764 mutex_lock(&ap->scsi_host->scan_mutex);
3768 spin_lock_irqsave(ap->lock, flags); 3765 spin_lock_irqsave(ap->lock, flags);
3769 3766
3770 if (zpodd_dev_enabled(dev)) 3767 if (zpodd_dev_enabled(dev))
3771 zpodd_exit(dev); 3768 zpodd_exit(dev);
3772 3769
3773 /* clearing dev->sdev is protected by host lock */ 3770 /* clearing dev->sdev is protected by host lock */
3774 sdev = dev->sdev; 3771 sdev = dev->sdev;
3775 dev->sdev = NULL; 3772 dev->sdev = NULL;
3776 3773
3777 if (sdev) { 3774 if (sdev) {
3778 /* If user initiated unplug races with us, sdev can go 3775 /* If user initiated unplug races with us, sdev can go
3779 * away underneath us after the host lock and 3776 * away underneath us after the host lock and
3780 * scan_mutex are released. Hold onto it. 3777 * scan_mutex are released. Hold onto it.
3781 */ 3778 */
3782 if (scsi_device_get(sdev) == 0) { 3779 if (scsi_device_get(sdev) == 0) {
3783 /* The following ensures the attached sdev is 3780 /* The following ensures the attached sdev is
3784 * offline on return from ata_scsi_offline_dev() 3781 * offline on return from ata_scsi_offline_dev()
3785 * regardless it wins or loses the race 3782 * regardless it wins or loses the race
3786 * against this function. 3783 * against this function.
3787 */ 3784 */
3788 scsi_device_set_state(sdev, SDEV_OFFLINE); 3785 scsi_device_set_state(sdev, SDEV_OFFLINE);
3789 } else { 3786 } else {
3790 WARN_ON(1); 3787 WARN_ON(1);
3791 sdev = NULL; 3788 sdev = NULL;
3792 } 3789 }
3793 } 3790 }
3794 3791
3795 spin_unlock_irqrestore(ap->lock, flags); 3792 spin_unlock_irqrestore(ap->lock, flags);
3796 mutex_unlock(&ap->scsi_host->scan_mutex); 3793 mutex_unlock(&ap->scsi_host->scan_mutex);
3797 3794
3798 if (sdev) { 3795 if (sdev) {
3799 ata_dev_info(dev, "detaching (SCSI %s)\n", 3796 ata_dev_info(dev, "detaching (SCSI %s)\n",
3800 dev_name(&sdev->sdev_gendev)); 3797 dev_name(&sdev->sdev_gendev));
3801 3798
3802 scsi_remove_device(sdev); 3799 scsi_remove_device(sdev);
3803 scsi_device_put(sdev); 3800 scsi_device_put(sdev);
3804 } 3801 }
3805 } 3802 }
3806 3803
3807 static void ata_scsi_handle_link_detach(struct ata_link *link) 3804 static void ata_scsi_handle_link_detach(struct ata_link *link)
3808 { 3805 {
3809 struct ata_port *ap = link->ap; 3806 struct ata_port *ap = link->ap;
3810 struct ata_device *dev; 3807 struct ata_device *dev;
3811 3808
3812 ata_for_each_dev(dev, link, ALL) { 3809 ata_for_each_dev(dev, link, ALL) {
3813 unsigned long flags; 3810 unsigned long flags;
3814 3811
3815 if (!(dev->flags & ATA_DFLAG_DETACHED)) 3812 if (!(dev->flags & ATA_DFLAG_DETACHED))
3816 continue; 3813 continue;
3817 3814
3818 spin_lock_irqsave(ap->lock, flags); 3815 spin_lock_irqsave(ap->lock, flags);
3819 dev->flags &= ~ATA_DFLAG_DETACHED; 3816 dev->flags &= ~ATA_DFLAG_DETACHED;
3820 spin_unlock_irqrestore(ap->lock, flags); 3817 spin_unlock_irqrestore(ap->lock, flags);
3821 3818
3822 ata_scsi_remove_dev(dev); 3819 ata_scsi_remove_dev(dev);
3823 } 3820 }
3824 } 3821 }
3825 3822
3826 /** 3823 /**
3827 * ata_scsi_media_change_notify - send media change event 3824 * ata_scsi_media_change_notify - send media change event
3828 * @dev: Pointer to the disk device with media change event 3825 * @dev: Pointer to the disk device with media change event
3829 * 3826 *
3830 * Tell the block layer to send a media change notification 3827 * Tell the block layer to send a media change notification
3831 * event. 3828 * event.
3832 * 3829 *
3833 * LOCKING: 3830 * LOCKING:
3834 * spin_lock_irqsave(host lock) 3831 * spin_lock_irqsave(host lock)
3835 */ 3832 */
3836 void ata_scsi_media_change_notify(struct ata_device *dev) 3833 void ata_scsi_media_change_notify(struct ata_device *dev)
3837 { 3834 {
3838 if (dev->sdev) 3835 if (dev->sdev)
3839 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 3836 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3840 GFP_ATOMIC); 3837 GFP_ATOMIC);
3841 } 3838 }
3842 3839
3843 /** 3840 /**
3844 * ata_scsi_hotplug - SCSI part of hotplug 3841 * ata_scsi_hotplug - SCSI part of hotplug
3845 * @work: Pointer to ATA port to perform SCSI hotplug on 3842 * @work: Pointer to ATA port to perform SCSI hotplug on
3846 * 3843 *
3847 * Perform SCSI part of hotplug. It's executed from a separate 3844 * Perform SCSI part of hotplug. It's executed from a separate
3848 * workqueue after EH completes. This is necessary because SCSI 3845 * workqueue after EH completes. This is necessary because SCSI
3849 * hot plugging requires working EH and hot unplugging is 3846 * hot plugging requires working EH and hot unplugging is
3850 * synchronized with hot plugging with a mutex. 3847 * synchronized with hot plugging with a mutex.
3851 * 3848 *
3852 * LOCKING: 3849 * LOCKING:
3853 * Kernel thread context (may sleep). 3850 * Kernel thread context (may sleep).
3854 */ 3851 */
3855 void ata_scsi_hotplug(struct work_struct *work) 3852 void ata_scsi_hotplug(struct work_struct *work)
3856 { 3853 {
3857 struct ata_port *ap = 3854 struct ata_port *ap =
3858 container_of(work, struct ata_port, hotplug_task.work); 3855 container_of(work, struct ata_port, hotplug_task.work);
3859 int i; 3856 int i;
3860 3857
3861 if (ap->pflags & ATA_PFLAG_UNLOADING) { 3858 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3862 DPRINTK("ENTER/EXIT - unloading\n"); 3859 DPRINTK("ENTER/EXIT - unloading\n");
3863 return; 3860 return;
3864 } 3861 }
3865 3862
3866 DPRINTK("ENTER\n"); 3863 DPRINTK("ENTER\n");
3867 mutex_lock(&ap->scsi_scan_mutex); 3864 mutex_lock(&ap->scsi_scan_mutex);
3868 3865
3869 /* Unplug detached devices. We cannot use link iterator here 3866 /* Unplug detached devices. We cannot use link iterator here
3870 * because PMP links have to be scanned even if PMP is 3867 * because PMP links have to be scanned even if PMP is
3871 * currently not attached. Iterate manually. 3868 * currently not attached. Iterate manually.
3872 */ 3869 */
3873 ata_scsi_handle_link_detach(&ap->link); 3870 ata_scsi_handle_link_detach(&ap->link);
3874 if (ap->pmp_link) 3871 if (ap->pmp_link)
3875 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 3872 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3876 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 3873 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3877 3874
3878 /* scan for new ones */ 3875 /* scan for new ones */
3879 ata_scsi_scan_host(ap, 0); 3876 ata_scsi_scan_host(ap, 0);
3880 3877
3881 mutex_unlock(&ap->scsi_scan_mutex); 3878 mutex_unlock(&ap->scsi_scan_mutex);
3882 DPRINTK("EXIT\n"); 3879 DPRINTK("EXIT\n");
3883 } 3880 }
3884 3881
3885 /** 3882 /**
3886 * ata_scsi_user_scan - indication for user-initiated bus scan 3883 * ata_scsi_user_scan - indication for user-initiated bus scan
3887 * @shost: SCSI host to scan 3884 * @shost: SCSI host to scan
3888 * @channel: Channel to scan 3885 * @channel: Channel to scan
3889 * @id: ID to scan 3886 * @id: ID to scan
3890 * @lun: LUN to scan 3887 * @lun: LUN to scan
3891 * 3888 *
3892 * This function is called when user explicitly requests bus 3889 * This function is called when user explicitly requests bus
3893 * scan. Set probe pending flag and invoke EH. 3890 * scan. Set probe pending flag and invoke EH.
3894 * 3891 *
3895 * LOCKING: 3892 * LOCKING:
3896 * SCSI layer (we don't care) 3893 * SCSI layer (we don't care)
3897 * 3894 *
3898 * RETURNS: 3895 * RETURNS:
3899 * Zero. 3896 * Zero.
3900 */ 3897 */
3901 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 3898 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3902 unsigned int id, unsigned int lun) 3899 unsigned int id, unsigned int lun)
3903 { 3900 {
3904 struct ata_port *ap = ata_shost_to_port(shost); 3901 struct ata_port *ap = ata_shost_to_port(shost);
3905 unsigned long flags; 3902 unsigned long flags;
3906 int devno, rc = 0; 3903 int devno, rc = 0;
3907 3904
3908 if (!ap->ops->error_handler) 3905 if (!ap->ops->error_handler)
3909 return -EOPNOTSUPP; 3906 return -EOPNOTSUPP;
3910 3907
3911 if (lun != SCAN_WILD_CARD && lun) 3908 if (lun != SCAN_WILD_CARD && lun)
3912 return -EINVAL; 3909 return -EINVAL;
3913 3910
3914 if (!sata_pmp_attached(ap)) { 3911 if (!sata_pmp_attached(ap)) {
3915 if (channel != SCAN_WILD_CARD && channel) 3912 if (channel != SCAN_WILD_CARD && channel)
3916 return -EINVAL; 3913 return -EINVAL;
3917 devno = id; 3914 devno = id;
3918 } else { 3915 } else {
3919 if (id != SCAN_WILD_CARD && id) 3916 if (id != SCAN_WILD_CARD && id)
3920 return -EINVAL; 3917 return -EINVAL;
3921 devno = channel; 3918 devno = channel;
3922 } 3919 }
3923 3920
3924 spin_lock_irqsave(ap->lock, flags); 3921 spin_lock_irqsave(ap->lock, flags);
3925 3922
3926 if (devno == SCAN_WILD_CARD) { 3923 if (devno == SCAN_WILD_CARD) {
3927 struct ata_link *link; 3924 struct ata_link *link;
3928 3925
3929 ata_for_each_link(link, ap, EDGE) { 3926 ata_for_each_link(link, ap, EDGE) {
3930 struct ata_eh_info *ehi = &link->eh_info; 3927 struct ata_eh_info *ehi = &link->eh_info;
3931 ehi->probe_mask |= ATA_ALL_DEVICES; 3928 ehi->probe_mask |= ATA_ALL_DEVICES;
3932 ehi->action |= ATA_EH_RESET; 3929 ehi->action |= ATA_EH_RESET;
3933 } 3930 }
3934 } else { 3931 } else {
3935 struct ata_device *dev = ata_find_dev(ap, devno); 3932 struct ata_device *dev = ata_find_dev(ap, devno);
3936 3933
3937 if (dev) { 3934 if (dev) {
3938 struct ata_eh_info *ehi = &dev->link->eh_info; 3935 struct ata_eh_info *ehi = &dev->link->eh_info;
3939 ehi->probe_mask |= 1 << dev->devno; 3936 ehi->probe_mask |= 1 << dev->devno;
3940 ehi->action |= ATA_EH_RESET; 3937 ehi->action |= ATA_EH_RESET;
3941 } else 3938 } else
3942 rc = -EINVAL; 3939 rc = -EINVAL;
3943 } 3940 }
3944 3941
3945 if (rc == 0) { 3942 if (rc == 0) {
3946 ata_port_schedule_eh(ap); 3943 ata_port_schedule_eh(ap);
3947 spin_unlock_irqrestore(ap->lock, flags); 3944 spin_unlock_irqrestore(ap->lock, flags);
3948 ata_port_wait_eh(ap); 3945 ata_port_wait_eh(ap);
3949 } else 3946 } else
3950 spin_unlock_irqrestore(ap->lock, flags); 3947 spin_unlock_irqrestore(ap->lock, flags);
3951 3948
3952 return rc; 3949 return rc;
3953 } 3950 }
3954 3951
3955 /** 3952 /**
3956 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 3953 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3957 * @work: Pointer to ATA port to perform scsi_rescan_device() 3954 * @work: Pointer to ATA port to perform scsi_rescan_device()
3958 * 3955 *
3959 * After ATA pass thru (SAT) commands are executed successfully, 3956 * After ATA pass thru (SAT) commands are executed successfully,
3960 * libata need to propagate the changes to SCSI layer. 3957 * libata need to propagate the changes to SCSI layer.
3961 * 3958 *
3962 * LOCKING: 3959 * LOCKING:
3963 * Kernel thread context (may sleep). 3960 * Kernel thread context (may sleep).
3964 */ 3961 */
3965 void ata_scsi_dev_rescan(struct work_struct *work) 3962 void ata_scsi_dev_rescan(struct work_struct *work)
3966 { 3963 {
3967 struct ata_port *ap = 3964 struct ata_port *ap =
3968 container_of(work, struct ata_port, scsi_rescan_task); 3965 container_of(work, struct ata_port, scsi_rescan_task);
3969 struct ata_link *link; 3966 struct ata_link *link;
3970 struct ata_device *dev; 3967 struct ata_device *dev;
3971 unsigned long flags; 3968 unsigned long flags;
3972 3969
3973 mutex_lock(&ap->scsi_scan_mutex); 3970 mutex_lock(&ap->scsi_scan_mutex);
3974 spin_lock_irqsave(ap->lock, flags); 3971 spin_lock_irqsave(ap->lock, flags);
3975 3972
3976 ata_for_each_link(link, ap, EDGE) { 3973 ata_for_each_link(link, ap, EDGE) {
3977 ata_for_each_dev(dev, link, ENABLED) { 3974 ata_for_each_dev(dev, link, ENABLED) {
3978 struct scsi_device *sdev = dev->sdev; 3975 struct scsi_device *sdev = dev->sdev;
3979 3976
3980 if (!sdev) 3977 if (!sdev)
3981 continue; 3978 continue;
3982 if (scsi_device_get(sdev)) 3979 if (scsi_device_get(sdev))
3983 continue; 3980 continue;
3984 3981
3985 spin_unlock_irqrestore(ap->lock, flags); 3982 spin_unlock_irqrestore(ap->lock, flags);
3986 scsi_rescan_device(&(sdev->sdev_gendev)); 3983 scsi_rescan_device(&(sdev->sdev_gendev));
3987 scsi_device_put(sdev); 3984 scsi_device_put(sdev);
3988 spin_lock_irqsave(ap->lock, flags); 3985 spin_lock_irqsave(ap->lock, flags);
3989 } 3986 }
3990 } 3987 }
3991 3988
3992 spin_unlock_irqrestore(ap->lock, flags); 3989 spin_unlock_irqrestore(ap->lock, flags);
3993 mutex_unlock(&ap->scsi_scan_mutex); 3990 mutex_unlock(&ap->scsi_scan_mutex);
3994 } 3991 }
3995 3992
3996 /** 3993 /**
3997 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 3994 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3998 * @host: ATA host container for all SAS ports 3995 * @host: ATA host container for all SAS ports
3999 * @port_info: Information from low-level host driver 3996 * @port_info: Information from low-level host driver
4000 * @shost: SCSI host that the scsi device is attached to 3997 * @shost: SCSI host that the scsi device is attached to
4001 * 3998 *
4002 * LOCKING: 3999 * LOCKING:
4003 * PCI/etc. bus probe sem. 4000 * PCI/etc. bus probe sem.
4004 * 4001 *
4005 * RETURNS: 4002 * RETURNS:
4006 * ata_port pointer on success / NULL on failure. 4003 * ata_port pointer on success / NULL on failure.
4007 */ 4004 */
4008 4005
4009 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4006 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4010 struct ata_port_info *port_info, 4007 struct ata_port_info *port_info,
4011 struct Scsi_Host *shost) 4008 struct Scsi_Host *shost)
4012 { 4009 {
4013 struct ata_port *ap; 4010 struct ata_port *ap;
4014 4011
4015 ap = ata_port_alloc(host); 4012 ap = ata_port_alloc(host);
4016 if (!ap) 4013 if (!ap)
4017 return NULL; 4014 return NULL;
4018 4015
4019 ap->port_no = 0; 4016 ap->port_no = 0;
4020 ap->lock = &host->lock; 4017 ap->lock = &host->lock;
4021 ap->pio_mask = port_info->pio_mask; 4018 ap->pio_mask = port_info->pio_mask;
4022 ap->mwdma_mask = port_info->mwdma_mask; 4019 ap->mwdma_mask = port_info->mwdma_mask;
4023 ap->udma_mask = port_info->udma_mask; 4020 ap->udma_mask = port_info->udma_mask;
4024 ap->flags |= port_info->flags; 4021 ap->flags |= port_info->flags;
4025 ap->ops = port_info->port_ops; 4022 ap->ops = port_info->port_ops;
4026 ap->cbl = ATA_CBL_SATA; 4023 ap->cbl = ATA_CBL_SATA;
4027 4024
4028 return ap; 4025 return ap;
4029 } 4026 }
4030 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4027 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4031 4028
4032 /** 4029 /**
4033 * ata_sas_port_start - Set port up for dma. 4030 * ata_sas_port_start - Set port up for dma.
4034 * @ap: Port to initialize 4031 * @ap: Port to initialize
4035 * 4032 *
4036 * Called just after data structures for each port are 4033 * Called just after data structures for each port are
4037 * initialized. 4034 * initialized.
4038 * 4035 *
4039 * May be used as the port_start() entry in ata_port_operations. 4036 * May be used as the port_start() entry in ata_port_operations.
4040 * 4037 *
4041 * LOCKING: 4038 * LOCKING:
4042 * Inherited from caller. 4039 * Inherited from caller.
4043 */ 4040 */
4044 int ata_sas_port_start(struct ata_port *ap) 4041 int ata_sas_port_start(struct ata_port *ap)
4045 { 4042 {
4046 /* 4043 /*
4047 * the port is marked as frozen at allocation time, but if we don't 4044 * the port is marked as frozen at allocation time, but if we don't
4048 * have new eh, we won't thaw it 4045 * have new eh, we won't thaw it
4049 */ 4046 */
4050 if (!ap->ops->error_handler) 4047 if (!ap->ops->error_handler)
4051 ap->pflags &= ~ATA_PFLAG_FROZEN; 4048 ap->pflags &= ~ATA_PFLAG_FROZEN;
4052 return 0; 4049 return 0;
4053 } 4050 }
4054 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4051 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4055 4052
4056 /** 4053 /**
4057 * ata_port_stop - Undo ata_sas_port_start() 4054 * ata_port_stop - Undo ata_sas_port_start()
4058 * @ap: Port to shut down 4055 * @ap: Port to shut down
4059 * 4056 *
4060 * May be used as the port_stop() entry in ata_port_operations. 4057 * May be used as the port_stop() entry in ata_port_operations.
4061 * 4058 *
4062 * LOCKING: 4059 * LOCKING:
4063 * Inherited from caller. 4060 * Inherited from caller.
4064 */ 4061 */
4065 4062
4066 void ata_sas_port_stop(struct ata_port *ap) 4063 void ata_sas_port_stop(struct ata_port *ap)
4067 { 4064 {
4068 } 4065 }
4069 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4066 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4070 4067
4071 /** 4068 /**
4072 * ata_sas_async_probe - simply schedule probing and return 4069 * ata_sas_async_probe - simply schedule probing and return
4073 * @ap: Port to probe 4070 * @ap: Port to probe
4074 * 4071 *
4075 * For batch scheduling of probe for sas attached ata devices, assumes 4072 * For batch scheduling of probe for sas attached ata devices, assumes
4076 * the port has already been through ata_sas_port_init() 4073 * the port has already been through ata_sas_port_init()
4077 */ 4074 */
4078 void ata_sas_async_probe(struct ata_port *ap) 4075 void ata_sas_async_probe(struct ata_port *ap)
4079 { 4076 {
4080 __ata_port_probe(ap); 4077 __ata_port_probe(ap);
4081 } 4078 }
4082 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4079 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4083 4080
4084 int ata_sas_sync_probe(struct ata_port *ap) 4081 int ata_sas_sync_probe(struct ata_port *ap)
4085 { 4082 {
4086 return ata_port_probe(ap); 4083 return ata_port_probe(ap);
4087 } 4084 }
4088 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4085 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4089 4086
4090 4087
4091 /** 4088 /**
4092 * ata_sas_port_init - Initialize a SATA device 4089 * ata_sas_port_init - Initialize a SATA device
4093 * @ap: SATA port to initialize 4090 * @ap: SATA port to initialize
4094 * 4091 *
4095 * LOCKING: 4092 * LOCKING:
4096 * PCI/etc. bus probe sem. 4093 * PCI/etc. bus probe sem.
4097 * 4094 *
4098 * RETURNS: 4095 * RETURNS:
4099 * Zero on success, non-zero on error. 4096 * Zero on success, non-zero on error.
4100 */ 4097 */
4101 4098
4102 int ata_sas_port_init(struct ata_port *ap) 4099 int ata_sas_port_init(struct ata_port *ap)
4103 { 4100 {
4104 int rc = ap->ops->port_start(ap); 4101 int rc = ap->ops->port_start(ap);
4105 4102
4106 if (rc) 4103 if (rc)
4107 return rc; 4104 return rc;
4108 ap->print_id = atomic_inc_return(&ata_print_id); 4105 ap->print_id = atomic_inc_return(&ata_print_id);
4109 return 0; 4106 return 0;
4110 } 4107 }
4111 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4108 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4112 4109
4113 /** 4110 /**
4114 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4111 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4115 * @ap: SATA port to destroy 4112 * @ap: SATA port to destroy
4116 * 4113 *
4117 */ 4114 */
4118 4115
4119 void ata_sas_port_destroy(struct ata_port *ap) 4116 void ata_sas_port_destroy(struct ata_port *ap)
4120 { 4117 {
4121 if (ap->ops->port_stop) 4118 if (ap->ops->port_stop)
4122 ap->ops->port_stop(ap); 4119 ap->ops->port_stop(ap);
4123 kfree(ap); 4120 kfree(ap);
4124 } 4121 }
4125 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4122 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4126 4123
4127 /** 4124 /**
4128 * ata_sas_slave_configure - Default slave_config routine for libata devices 4125 * ata_sas_slave_configure - Default slave_config routine for libata devices
4129 * @sdev: SCSI device to configure 4126 * @sdev: SCSI device to configure
4130 * @ap: ATA port to which SCSI device is attached 4127 * @ap: ATA port to which SCSI device is attached
4131 * 4128 *
4132 * RETURNS: 4129 * RETURNS:
4133 * Zero. 4130 * Zero.
4134 */ 4131 */
4135 4132
4136 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4133 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4137 { 4134 {
4138 ata_scsi_sdev_config(sdev); 4135 ata_scsi_sdev_config(sdev);
4139 ata_scsi_dev_config(sdev, ap->link.device); 4136 ata_scsi_dev_config(sdev, ap->link.device);
4140 return 0; 4137 return 0;
4141 } 4138 }
4142 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4139 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4143 4140
4144 /** 4141 /**
4145 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 4142 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4146 * @cmd: SCSI command to be sent 4143 * @cmd: SCSI command to be sent
4147 * @ap: ATA port to which the command is being sent 4144 * @ap: ATA port to which the command is being sent
4148 * 4145 *
4149 * RETURNS: 4146 * RETURNS:
4150 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4147 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4151 * 0 otherwise. 4148 * 0 otherwise.
4152 */ 4149 */
4153 4150
4154 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 4151 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4155 { 4152 {
4156 int rc = 0; 4153 int rc = 0;
4157 4154
4158 ata_scsi_dump_cdb(ap, cmd); 4155 ata_scsi_dump_cdb(ap, cmd);
4159 4156
4160 if (likely(ata_dev_enabled(ap->link.device))) 4157 if (likely(ata_dev_enabled(ap->link.device)))
4161 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 4158 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4162 else { 4159 else {
4163 cmd->result = (DID_BAD_TARGET << 16); 4160 cmd->result = (DID_BAD_TARGET << 16);