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Commit 98dcd59dd063dd8099d8dbccd84a40e927dc7138

Authored by Camuso, Tony
Committed by Greg Kroah-Hartman
1 parent f6a4e494e0
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

misc: hpilo: increase number of max supported channels 

Increase number of supported channels from 8 to 24.
Make the number of channels configurable via module parameter max_ccb.

Signed-off-by: Mark Rusk <mark.rusk@hp.com>
Signed-off-by: Tony Camuso <tony.camuso@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 2 changed files with 24 additions and 13 deletions Inline Diff

drivers/misc/hpilo.c
Diff comments   View file @ 98dcd59
1 /* 1 /*
2 * Driver for the HP iLO management processor. 2 * Driver for the HP iLO management processor.
3 * 3 *
4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. 4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
5 * David Altobelli <david.altobelli@hp.com> 5 * David Altobelli <david.altobelli@hp.com>
6 * 6 *
7 * This program is free software; you can redistribute it and/or modify 7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as 8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation. 9 * published by the Free Software Foundation.
10 */ 10 */
11 #include <linux/kernel.h> 11 #include <linux/kernel.h>
12 #include <linux/types.h> 12 #include <linux/types.h>
13 #include <linux/module.h> 13 #include <linux/module.h>
14 #include <linux/fs.h> 14 #include <linux/fs.h>
15 #include <linux/pci.h> 15 #include <linux/pci.h>
16 #include <linux/interrupt.h> 16 #include <linux/interrupt.h>
17 #include <linux/ioport.h> 17 #include <linux/ioport.h>
18 #include <linux/device.h> 18 #include <linux/device.h>
19 #include <linux/file.h> 19 #include <linux/file.h>
20 #include <linux/cdev.h> 20 #include <linux/cdev.h>
21 #include <linux/sched.h> 21 #include <linux/sched.h>
22 #include <linux/spinlock.h> 22 #include <linux/spinlock.h>
23 #include <linux/delay.h> 23 #include <linux/delay.h>
24 #include <linux/uaccess.h> 24 #include <linux/uaccess.h>
25 #include <linux/io.h> 25 #include <linux/io.h>
26 #include <linux/wait.h> 26 #include <linux/wait.h>
27 #include <linux/poll.h> 27 #include <linux/poll.h>
28 #include <linux/slab.h> 28 #include <linux/slab.h>
29 #include "hpilo.h" 29 #include "hpilo.h"
30 30
31 static struct class *ilo_class; 31 static struct class *ilo_class;
32 static unsigned int ilo_major; 32 static unsigned int ilo_major;
33 static unsigned int max_ccb = MIN_CCB;
33 static char ilo_hwdev[MAX_ILO_DEV]; 34 static char ilo_hwdev[MAX_ILO_DEV];
34 35
35 static inline int get_entry_id(int entry) 36 static inline int get_entry_id(int entry)
36 { 37 {
37 return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR; 38 return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR;
38 } 39 }
39 40
40 static inline int get_entry_len(int entry) 41 static inline int get_entry_len(int entry)
41 { 42 {
42 return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3; 43 return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3;
43 } 44 }
44 45
45 static inline int mk_entry(int id, int len) 46 static inline int mk_entry(int id, int len)
46 { 47 {
47 int qlen = len & 7 ? (len >> 3) + 1 : len >> 3; 48 int qlen = len & 7 ? (len >> 3) + 1 : len >> 3;
48 return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS; 49 return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS;
49 } 50 }
50 51
51 static inline int desc_mem_sz(int nr_entry) 52 static inline int desc_mem_sz(int nr_entry)
52 { 53 {
53 return nr_entry << L2_QENTRY_SZ; 54 return nr_entry << L2_QENTRY_SZ;
54 } 55 }
55 56
56 /* 57 /*
57 * FIFO queues, shared with hardware. 58 * FIFO queues, shared with hardware.
58 * 59 *
59 * If a queue has empty slots, an entry is added to the queue tail, 60 * If a queue has empty slots, an entry is added to the queue tail,
60 * and that entry is marked as occupied. 61 * and that entry is marked as occupied.
61 * Entries can be dequeued from the head of the list, when the device 62 * Entries can be dequeued from the head of the list, when the device
62 * has marked the entry as consumed. 63 * has marked the entry as consumed.
63 * 64 *
64 * Returns true on successful queue/dequeue, false on failure. 65 * Returns true on successful queue/dequeue, false on failure.
65 */ 66 */
66 static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry) 67 static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
67 { 68 {
68 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); 69 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
69 unsigned long flags; 70 unsigned long flags;
70 int ret = 0; 71 int ret = 0;
71 72
72 spin_lock_irqsave(&hw->fifo_lock, flags); 73 spin_lock_irqsave(&hw->fifo_lock, flags);
73 if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask] 74 if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask]
74 & ENTRY_MASK_O)) { 75 & ENTRY_MASK_O)) {
75 fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |= 76 fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
76 (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge; 77 (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge;
77 fifo_q->tail += 1; 78 fifo_q->tail += 1;
78 ret = 1; 79 ret = 1;
79 } 80 }
80 spin_unlock_irqrestore(&hw->fifo_lock, flags); 81 spin_unlock_irqrestore(&hw->fifo_lock, flags);
81 82
82 return ret; 83 return ret;
83 } 84 }
84 85
85 static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry) 86 static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
86 { 87 {
87 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); 88 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
88 unsigned long flags; 89 unsigned long flags;
89 int ret = 0; 90 int ret = 0;
90 u64 c; 91 u64 c;
91 92
92 spin_lock_irqsave(&hw->fifo_lock, flags); 93 spin_lock_irqsave(&hw->fifo_lock, flags);
93 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; 94 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
94 if (c & ENTRY_MASK_C) { 95 if (c & ENTRY_MASK_C) {
95 if (entry) 96 if (entry)
96 *entry = c & ENTRY_MASK_NOSTATE; 97 *entry = c & ENTRY_MASK_NOSTATE;
97 98
98 fifo_q->fifobar[fifo_q->head & fifo_q->imask] = 99 fifo_q->fifobar[fifo_q->head & fifo_q->imask] =
99 (c | ENTRY_MASK) + 1; 100 (c | ENTRY_MASK) + 1;
100 fifo_q->head += 1; 101 fifo_q->head += 1;
101 ret = 1; 102 ret = 1;
102 } 103 }
103 spin_unlock_irqrestore(&hw->fifo_lock, flags); 104 spin_unlock_irqrestore(&hw->fifo_lock, flags);
104 105
105 return ret; 106 return ret;
106 } 107 }
107 108
108 static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar) 109 static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
109 { 110 {
110 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); 111 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
111 unsigned long flags; 112 unsigned long flags;
112 int ret = 0; 113 int ret = 0;
113 u64 c; 114 u64 c;
114 115
115 spin_lock_irqsave(&hw->fifo_lock, flags); 116 spin_lock_irqsave(&hw->fifo_lock, flags);
116 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; 117 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
117 if (c & ENTRY_MASK_C) 118 if (c & ENTRY_MASK_C)
118 ret = 1; 119 ret = 1;
119 spin_unlock_irqrestore(&hw->fifo_lock, flags); 120 spin_unlock_irqrestore(&hw->fifo_lock, flags);
120 121
121 return ret; 122 return ret;
122 } 123 }
123 124
124 static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb, 125 static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb,
125 int dir, int id, int len) 126 int dir, int id, int len)
126 { 127 {
127 char *fifobar; 128 char *fifobar;
128 int entry; 129 int entry;
129 130
130 if (dir == SENDQ) 131 if (dir == SENDQ)
131 fifobar = ccb->ccb_u1.send_fifobar; 132 fifobar = ccb->ccb_u1.send_fifobar;
132 else 133 else
133 fifobar = ccb->ccb_u3.recv_fifobar; 134 fifobar = ccb->ccb_u3.recv_fifobar;
134 135
135 entry = mk_entry(id, len); 136 entry = mk_entry(id, len);
136 return fifo_enqueue(hw, fifobar, entry); 137 return fifo_enqueue(hw, fifobar, entry);
137 } 138 }
138 139
139 static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb, 140 static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb,
140 int dir, int *id, int *len, void **pkt) 141 int dir, int *id, int *len, void **pkt)
141 { 142 {
142 char *fifobar, *desc; 143 char *fifobar, *desc;
143 int entry = 0, pkt_id = 0; 144 int entry = 0, pkt_id = 0;
144 int ret; 145 int ret;
145 146
146 if (dir == SENDQ) { 147 if (dir == SENDQ) {
147 fifobar = ccb->ccb_u1.send_fifobar; 148 fifobar = ccb->ccb_u1.send_fifobar;
148 desc = ccb->ccb_u2.send_desc; 149 desc = ccb->ccb_u2.send_desc;
149 } else { 150 } else {
150 fifobar = ccb->ccb_u3.recv_fifobar; 151 fifobar = ccb->ccb_u3.recv_fifobar;
151 desc = ccb->ccb_u4.recv_desc; 152 desc = ccb->ccb_u4.recv_desc;
152 } 153 }
153 154
154 ret = fifo_dequeue(hw, fifobar, &entry); 155 ret = fifo_dequeue(hw, fifobar, &entry);
155 if (ret) { 156 if (ret) {
156 pkt_id = get_entry_id(entry); 157 pkt_id = get_entry_id(entry);
157 if (id) 158 if (id)
158 *id = pkt_id; 159 *id = pkt_id;
159 if (len) 160 if (len)
160 *len = get_entry_len(entry); 161 *len = get_entry_len(entry);
161 if (pkt) 162 if (pkt)
162 *pkt = (void *)(desc + desc_mem_sz(pkt_id)); 163 *pkt = (void *)(desc + desc_mem_sz(pkt_id));
163 } 164 }
164 165
165 return ret; 166 return ret;
166 } 167 }
167 168
168 static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb) 169 static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
169 { 170 {
170 char *fifobar = ccb->ccb_u3.recv_fifobar; 171 char *fifobar = ccb->ccb_u3.recv_fifobar;
171 172
172 return fifo_check_recv(hw, fifobar); 173 return fifo_check_recv(hw, fifobar);
173 } 174 }
174 175
175 static inline void doorbell_set(struct ccb *ccb) 176 static inline void doorbell_set(struct ccb *ccb)
176 { 177 {
177 iowrite8(1, ccb->ccb_u5.db_base); 178 iowrite8(1, ccb->ccb_u5.db_base);
178 } 179 }
179 180
180 static inline void doorbell_clr(struct ccb *ccb) 181 static inline void doorbell_clr(struct ccb *ccb)
181 { 182 {
182 iowrite8(2, ccb->ccb_u5.db_base); 183 iowrite8(2, ccb->ccb_u5.db_base);
183 } 184 }
184 185
185 static inline int ctrl_set(int l2sz, int idxmask, int desclim) 186 static inline int ctrl_set(int l2sz, int idxmask, int desclim)
186 { 187 {
187 int active = 0, go = 1; 188 int active = 0, go = 1;
188 return l2sz << CTRL_BITPOS_L2SZ | 189 return l2sz << CTRL_BITPOS_L2SZ |
189 idxmask << CTRL_BITPOS_FIFOINDEXMASK | 190 idxmask << CTRL_BITPOS_FIFOINDEXMASK |
190 desclim << CTRL_BITPOS_DESCLIMIT | 191 desclim << CTRL_BITPOS_DESCLIMIT |
191 active << CTRL_BITPOS_A | 192 active << CTRL_BITPOS_A |
192 go << CTRL_BITPOS_G; 193 go << CTRL_BITPOS_G;
193 } 194 }
194 195
195 static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz) 196 static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
196 { 197 {
197 /* for simplicity, use the same parameters for send and recv ctrls */ 198 /* for simplicity, use the same parameters for send and recv ctrls */
198 ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); 199 ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
199 ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); 200 ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
200 } 201 }
201 202
202 static inline int fifo_sz(int nr_entry) 203 static inline int fifo_sz(int nr_entry)
203 { 204 {
204 /* size of a fifo is determined by the number of entries it contains */ 205 /* size of a fifo is determined by the number of entries it contains */
205 return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE; 206 return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE;
206 } 207 }
207 208
208 static void fifo_setup(void *base_addr, int nr_entry) 209 static void fifo_setup(void *base_addr, int nr_entry)
209 { 210 {
210 struct fifo *fifo_q = base_addr; 211 struct fifo *fifo_q = base_addr;
211 int i; 212 int i;
212 213
213 /* set up an empty fifo */ 214 /* set up an empty fifo */
214 fifo_q->head = 0; 215 fifo_q->head = 0;
215 fifo_q->tail = 0; 216 fifo_q->tail = 0;
216 fifo_q->reset = 0; 217 fifo_q->reset = 0;
217 fifo_q->nrents = nr_entry; 218 fifo_q->nrents = nr_entry;
218 fifo_q->imask = nr_entry - 1; 219 fifo_q->imask = nr_entry - 1;
219 fifo_q->merge = ENTRY_MASK_O; 220 fifo_q->merge = ENTRY_MASK_O;
220 221
221 for (i = 0; i < nr_entry; i++) 222 for (i = 0; i < nr_entry; i++)
222 fifo_q->fifobar[i] = 0; 223 fifo_q->fifobar[i] = 0;
223 } 224 }
224 225
225 static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data) 226 static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
226 { 227 {
227 struct ccb *driver_ccb = &data->driver_ccb; 228 struct ccb *driver_ccb = &data->driver_ccb;
228 struct ccb __iomem *device_ccb = data->mapped_ccb; 229 struct ccb __iomem *device_ccb = data->mapped_ccb;
229 int retries; 230 int retries;
230 231
231 /* complicated dance to tell the hw we are stopping */ 232 /* complicated dance to tell the hw we are stopping */
232 doorbell_clr(driver_ccb); 233 doorbell_clr(driver_ccb);
233 iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G), 234 iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
234 &device_ccb->send_ctrl); 235 &device_ccb->send_ctrl);
235 iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G), 236 iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G),
236 &device_ccb->recv_ctrl); 237 &device_ccb->recv_ctrl);
237 238
238 /* give iLO some time to process stop request */ 239 /* give iLO some time to process stop request */
239 for (retries = MAX_WAIT; retries > 0; retries--) { 240 for (retries = MAX_WAIT; retries > 0; retries--) {
240 doorbell_set(driver_ccb); 241 doorbell_set(driver_ccb);
241 udelay(WAIT_TIME); 242 udelay(WAIT_TIME);
242 if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A)) 243 if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A))
243 && 244 &&
244 !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A))) 245 !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
245 break; 246 break;
246 } 247 }
247 if (retries == 0) 248 if (retries == 0)
248 dev_err(&pdev->dev, "Closing, but controller still active\n"); 249 dev_err(&pdev->dev, "Closing, but controller still active\n");
249 250
250 /* clear the hw ccb */ 251 /* clear the hw ccb */
251 memset_io(device_ccb, 0, sizeof(struct ccb)); 252 memset_io(device_ccb, 0, sizeof(struct ccb));
252 253
253 /* free resources used to back send/recv queues */ 254 /* free resources used to back send/recv queues */
254 pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa); 255 pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa);
255 } 256 }
256 257
257 static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) 258 static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
258 { 259 {
259 char *dma_va; 260 char *dma_va;
260 dma_addr_t dma_pa; 261 dma_addr_t dma_pa;
261 struct ccb *driver_ccb, *ilo_ccb; 262 struct ccb *driver_ccb, *ilo_ccb;
262 263
263 driver_ccb = &data->driver_ccb; 264 driver_ccb = &data->driver_ccb;
264 ilo_ccb = &data->ilo_ccb; 265 ilo_ccb = &data->ilo_ccb;
265 266
266 data->dma_size = 2 * fifo_sz(NR_QENTRY) + 267 data->dma_size = 2 * fifo_sz(NR_QENTRY) +
267 2 * desc_mem_sz(NR_QENTRY) + 268 2 * desc_mem_sz(NR_QENTRY) +
268 ILO_START_ALIGN + ILO_CACHE_SZ; 269 ILO_START_ALIGN + ILO_CACHE_SZ;
269 270
270 data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size, 271 data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size,
271 &data->dma_pa); 272 &data->dma_pa);
272 if (!data->dma_va) 273 if (!data->dma_va)
273 return -ENOMEM; 274 return -ENOMEM;
274 275
275 dma_va = (char *)data->dma_va; 276 dma_va = (char *)data->dma_va;
276 dma_pa = data->dma_pa; 277 dma_pa = data->dma_pa;
277 278
278 memset(dma_va, 0, data->dma_size); 279 memset(dma_va, 0, data->dma_size);
279 280
280 dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); 281 dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN);
281 dma_pa = roundup(dma_pa, ILO_START_ALIGN); 282 dma_pa = roundup(dma_pa, ILO_START_ALIGN);
282 283
283 /* 284 /*
284 * Create two ccb's, one with virt addrs, one with phys addrs. 285 * Create two ccb's, one with virt addrs, one with phys addrs.
285 * Copy the phys addr ccb to device shared mem. 286 * Copy the phys addr ccb to device shared mem.
286 */ 287 */
287 ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ); 288 ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ);
288 ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ); 289 ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ);
289 290
290 fifo_setup(dma_va, NR_QENTRY); 291 fifo_setup(dma_va, NR_QENTRY);
291 driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE; 292 driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE;
292 ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE; 293 ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE;
293 dma_va += fifo_sz(NR_QENTRY); 294 dma_va += fifo_sz(NR_QENTRY);
294 dma_pa += fifo_sz(NR_QENTRY); 295 dma_pa += fifo_sz(NR_QENTRY);
295 296
296 dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ); 297 dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ);
297 dma_pa = roundup(dma_pa, ILO_CACHE_SZ); 298 dma_pa = roundup(dma_pa, ILO_CACHE_SZ);
298 299
299 fifo_setup(dma_va, NR_QENTRY); 300 fifo_setup(dma_va, NR_QENTRY);
300 driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE; 301 driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE;
301 ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE; 302 ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE;
302 dma_va += fifo_sz(NR_QENTRY); 303 dma_va += fifo_sz(NR_QENTRY);
303 dma_pa += fifo_sz(NR_QENTRY); 304 dma_pa += fifo_sz(NR_QENTRY);
304 305
305 driver_ccb->ccb_u2.send_desc = dma_va; 306 driver_ccb->ccb_u2.send_desc = dma_va;
306 ilo_ccb->ccb_u2.send_desc_pa = dma_pa; 307 ilo_ccb->ccb_u2.send_desc_pa = dma_pa;
307 dma_pa += desc_mem_sz(NR_QENTRY); 308 dma_pa += desc_mem_sz(NR_QENTRY);
308 dma_va += desc_mem_sz(NR_QENTRY); 309 dma_va += desc_mem_sz(NR_QENTRY);
309 310
310 driver_ccb->ccb_u4.recv_desc = dma_va; 311 driver_ccb->ccb_u4.recv_desc = dma_va;
311 ilo_ccb->ccb_u4.recv_desc_pa = dma_pa; 312 ilo_ccb->ccb_u4.recv_desc_pa = dma_pa;
312 313
313 driver_ccb->channel = slot; 314 driver_ccb->channel = slot;
314 ilo_ccb->channel = slot; 315 ilo_ccb->channel = slot;
315 316
316 driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE); 317 driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
317 ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */ 318 ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
318 319
319 return 0; 320 return 0;
320 } 321 }
321 322
322 static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) 323 static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
323 { 324 {
324 int pkt_id, pkt_sz; 325 int pkt_id, pkt_sz;
325 struct ccb *driver_ccb = &data->driver_ccb; 326 struct ccb *driver_ccb = &data->driver_ccb;
326 327
327 /* copy the ccb with physical addrs to device memory */ 328 /* copy the ccb with physical addrs to device memory */
328 data->mapped_ccb = (struct ccb __iomem *) 329 data->mapped_ccb = (struct ccb __iomem *)
329 (hw->ram_vaddr + (slot * ILOHW_CCB_SZ)); 330 (hw->ram_vaddr + (slot * ILOHW_CCB_SZ));
330 memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb)); 331 memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
331 332
332 /* put packets on the send and receive queues */ 333 /* put packets on the send and receive queues */
333 pkt_sz = 0; 334 pkt_sz = 0;
334 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) { 335 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) {
335 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz); 336 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz);
336 doorbell_set(driver_ccb); 337 doorbell_set(driver_ccb);
337 } 338 }
338 339
339 pkt_sz = desc_mem_sz(1); 340 pkt_sz = desc_mem_sz(1);
340 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) 341 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
341 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz); 342 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
342 343
343 /* the ccb is ready to use */ 344 /* the ccb is ready to use */
344 doorbell_clr(driver_ccb); 345 doorbell_clr(driver_ccb);
345 } 346 }
346 347
347 static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data) 348 static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
348 { 349 {
349 int pkt_id, i; 350 int pkt_id, i;
350 struct ccb *driver_ccb = &data->driver_ccb; 351 struct ccb *driver_ccb = &data->driver_ccb;
351 352
352 /* make sure iLO is really handling requests */ 353 /* make sure iLO is really handling requests */
353 for (i = MAX_WAIT; i > 0; i--) { 354 for (i = MAX_WAIT; i > 0; i--) {
354 if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL)) 355 if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL))
355 break; 356 break;
356 udelay(WAIT_TIME); 357 udelay(WAIT_TIME);
357 } 358 }
358 359
359 if (i == 0) { 360 if (i == 0) {
360 dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n"); 361 dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
361 return -EBUSY; 362 return -EBUSY;
362 } 363 }
363 364
364 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0); 365 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
365 doorbell_set(driver_ccb); 366 doorbell_set(driver_ccb);
366 return 0; 367 return 0;
367 } 368 }
368 369
369 static inline int is_channel_reset(struct ccb *ccb) 370 static inline int is_channel_reset(struct ccb *ccb)
370 { 371 {
371 /* check for this particular channel needing a reset */ 372 /* check for this particular channel needing a reset */
372 return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset; 373 return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset;
373 } 374 }
374 375
375 static inline void set_channel_reset(struct ccb *ccb) 376 static inline void set_channel_reset(struct ccb *ccb)
376 { 377 {
377 /* set a flag indicating this channel needs a reset */ 378 /* set a flag indicating this channel needs a reset */
378 FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1; 379 FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
379 } 380 }
380 381
381 static inline int get_device_outbound(struct ilo_hwinfo *hw) 382 static inline int get_device_outbound(struct ilo_hwinfo *hw)
382 { 383 {
383 return ioread32(&hw->mmio_vaddr[DB_OUT]); 384 return ioread32(&hw->mmio_vaddr[DB_OUT]);
384 } 385 }
385 386
386 static inline int is_db_reset(int db_out) 387 static inline int is_db_reset(int db_out)
387 { 388 {
388 return db_out & (1 << DB_RESET); 389 return db_out & (1 << DB_RESET);
389 } 390 }
390 391
391 static inline int is_device_reset(struct ilo_hwinfo *hw) 392 static inline int is_device_reset(struct ilo_hwinfo *hw)
392 { 393 {
393 /* check for global reset condition */ 394 /* check for global reset condition */
394 return is_db_reset(get_device_outbound(hw)); 395 return is_db_reset(get_device_outbound(hw));
395 } 396 }
396 397
397 static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr) 398 static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
398 { 399 {
399 iowrite32(clr, &hw->mmio_vaddr[DB_OUT]); 400 iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
400 } 401 }
401 402
402 static inline void clear_device(struct ilo_hwinfo *hw) 403 static inline void clear_device(struct ilo_hwinfo *hw)
403 { 404 {
404 /* clear the device (reset bits, pending channel entries) */ 405 /* clear the device (reset bits, pending channel entries) */
405 clear_pending_db(hw, -1); 406 clear_pending_db(hw, -1);
406 } 407 }
407 408
408 static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw) 409 static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw)
409 { 410 {
410 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]); 411 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
411 } 412 }
412 413
413 static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw) 414 static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
414 { 415 {
415 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1, 416 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
416 &hw->mmio_vaddr[DB_IRQ]); 417 &hw->mmio_vaddr[DB_IRQ]);
417 } 418 }
418 419
419 static void ilo_set_reset(struct ilo_hwinfo *hw) 420 static void ilo_set_reset(struct ilo_hwinfo *hw)
420 { 421 {
421 int slot; 422 int slot;
422 423
423 /* 424 /*
424 * Mapped memory is zeroed on ilo reset, so set a per ccb flag 425 * Mapped memory is zeroed on ilo reset, so set a per ccb flag
425 * to indicate that this ccb needs to be closed and reopened. 426 * to indicate that this ccb needs to be closed and reopened.
426 */ 427 */
427 for (slot = 0; slot < MAX_CCB; slot++) { 428 for (slot = 0; slot < max_ccb; slot++) {
428 if (!hw->ccb_alloc[slot]) 429 if (!hw->ccb_alloc[slot])
429 continue; 430 continue;
430 set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb); 431 set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
431 } 432 }
432 } 433 }
433 434
434 static ssize_t ilo_read(struct file *fp, char __user *buf, 435 static ssize_t ilo_read(struct file *fp, char __user *buf,
435 size_t len, loff_t *off) 436 size_t len, loff_t *off)
436 { 437 {
437 int err, found, cnt, pkt_id, pkt_len; 438 int err, found, cnt, pkt_id, pkt_len;
438 struct ccb_data *data = fp->private_data; 439 struct ccb_data *data = fp->private_data;
439 struct ccb *driver_ccb = &data->driver_ccb; 440 struct ccb *driver_ccb = &data->driver_ccb;
440 struct ilo_hwinfo *hw = data->ilo_hw; 441 struct ilo_hwinfo *hw = data->ilo_hw;
441 void *pkt; 442 void *pkt;
442 443
443 if (is_channel_reset(driver_ccb)) { 444 if (is_channel_reset(driver_ccb)) {
444 /* 445 /*
445 * If the device has been reset, applications 446 * If the device has been reset, applications
446 * need to close and reopen all ccbs. 447 * need to close and reopen all ccbs.
447 */ 448 */
448 return -ENODEV; 449 return -ENODEV;
449 } 450 }
450 451
451 /* 452 /*
452 * This function is to be called when data is expected 453 * This function is to be called when data is expected
453 * in the channel, and will return an error if no packet is found 454 * in the channel, and will return an error if no packet is found
454 * during the loop below. The sleep/retry logic is to allow 455 * during the loop below. The sleep/retry logic is to allow
455 * applications to call read() immediately post write(), 456 * applications to call read() immediately post write(),
456 * and give iLO some time to process the sent packet. 457 * and give iLO some time to process the sent packet.
457 */ 458 */
458 cnt = 20; 459 cnt = 20;
459 do { 460 do {
460 /* look for a received packet */ 461 /* look for a received packet */
461 found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id, 462 found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id,
462 &pkt_len, &pkt); 463 &pkt_len, &pkt);
463 if (found) 464 if (found)
464 break; 465 break;
465 cnt--; 466 cnt--;
466 msleep(100); 467 msleep(100);
467 } while (!found && cnt); 468 } while (!found && cnt);
468 469
469 if (!found) 470 if (!found)
470 return -EAGAIN; 471 return -EAGAIN;
471 472
472 /* only copy the length of the received packet */ 473 /* only copy the length of the received packet */
473 if (pkt_len < len) 474 if (pkt_len < len)
474 len = pkt_len; 475 len = pkt_len;
475 476
476 err = copy_to_user(buf, pkt, len); 477 err = copy_to_user(buf, pkt, len);
477 478
478 /* return the received packet to the queue */ 479 /* return the received packet to the queue */
479 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1)); 480 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1));
480 481
481 return err ? -EFAULT : len; 482 return err ? -EFAULT : len;
482 } 483 }
483 484
484 static ssize_t ilo_write(struct file *fp, const char __user *buf, 485 static ssize_t ilo_write(struct file *fp, const char __user *buf,
485 size_t len, loff_t *off) 486 size_t len, loff_t *off)
486 { 487 {
487 int err, pkt_id, pkt_len; 488 int err, pkt_id, pkt_len;
488 struct ccb_data *data = fp->private_data; 489 struct ccb_data *data = fp->private_data;
489 struct ccb *driver_ccb = &data->driver_ccb; 490 struct ccb *driver_ccb = &data->driver_ccb;
490 struct ilo_hwinfo *hw = data->ilo_hw; 491 struct ilo_hwinfo *hw = data->ilo_hw;
491 void *pkt; 492 void *pkt;
492 493
493 if (is_channel_reset(driver_ccb)) 494 if (is_channel_reset(driver_ccb))
494 return -ENODEV; 495 return -ENODEV;
495 496
496 /* get a packet to send the user command */ 497 /* get a packet to send the user command */
497 if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt)) 498 if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt))
498 return -EBUSY; 499 return -EBUSY;
499 500
500 /* limit the length to the length of the packet */ 501 /* limit the length to the length of the packet */
501 if (pkt_len < len) 502 if (pkt_len < len)
502 len = pkt_len; 503 len = pkt_len;
503 504
504 /* on failure, set the len to 0 to return empty packet to the device */ 505 /* on failure, set the len to 0 to return empty packet to the device */
505 err = copy_from_user(pkt, buf, len); 506 err = copy_from_user(pkt, buf, len);
506 if (err) 507 if (err)
507 len = 0; 508 len = 0;
508 509
509 /* send the packet */ 510 /* send the packet */
510 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len); 511 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len);
511 doorbell_set(driver_ccb); 512 doorbell_set(driver_ccb);
512 513
513 return err ? -EFAULT : len; 514 return err ? -EFAULT : len;
514 } 515 }
515 516
516 static unsigned int ilo_poll(struct file *fp, poll_table *wait) 517 static unsigned int ilo_poll(struct file *fp, poll_table *wait)
517 { 518 {
518 struct ccb_data *data = fp->private_data; 519 struct ccb_data *data = fp->private_data;
519 struct ccb *driver_ccb = &data->driver_ccb; 520 struct ccb *driver_ccb = &data->driver_ccb;
520 521
521 poll_wait(fp, &data->ccb_waitq, wait); 522 poll_wait(fp, &data->ccb_waitq, wait);
522 523
523 if (is_channel_reset(driver_ccb)) 524 if (is_channel_reset(driver_ccb))
524 return POLLERR; 525 return POLLERR;
525 else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) 526 else if (ilo_pkt_recv(data->ilo_hw, driver_ccb))
526 return POLLIN | POLLRDNORM; 527 return POLLIN | POLLRDNORM;
527 528
528 return 0; 529 return 0;
529 } 530 }
530 531
531 static int ilo_close(struct inode *ip, struct file *fp) 532 static int ilo_close(struct inode *ip, struct file *fp)
532 { 533 {
533 int slot; 534 int slot;
534 struct ccb_data *data; 535 struct ccb_data *data;
535 struct ilo_hwinfo *hw; 536 struct ilo_hwinfo *hw;
536 unsigned long flags; 537 unsigned long flags;
537 538
538 slot = iminor(ip) % MAX_CCB; 539 slot = iminor(ip) % max_ccb;
539 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); 540 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
540 541
541 spin_lock(&hw->open_lock); 542 spin_lock(&hw->open_lock);
542 543
543 if (hw->ccb_alloc[slot]->ccb_cnt == 1) { 544 if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
544 545
545 data = fp->private_data; 546 data = fp->private_data;
546 547
547 spin_lock_irqsave(&hw->alloc_lock, flags); 548 spin_lock_irqsave(&hw->alloc_lock, flags);
548 hw->ccb_alloc[slot] = NULL; 549 hw->ccb_alloc[slot] = NULL;
549 spin_unlock_irqrestore(&hw->alloc_lock, flags); 550 spin_unlock_irqrestore(&hw->alloc_lock, flags);
550 551
551 ilo_ccb_close(hw->ilo_dev, data); 552 ilo_ccb_close(hw->ilo_dev, data);
552 553
553 kfree(data); 554 kfree(data);
554 } else 555 } else
555 hw->ccb_alloc[slot]->ccb_cnt--; 556 hw->ccb_alloc[slot]->ccb_cnt--;
556 557
557 spin_unlock(&hw->open_lock); 558 spin_unlock(&hw->open_lock);
558 559
559 return 0; 560 return 0;
560 } 561 }
561 562
562 static int ilo_open(struct inode *ip, struct file *fp) 563 static int ilo_open(struct inode *ip, struct file *fp)
563 { 564 {
564 int slot, error; 565 int slot, error;
565 struct ccb_data *data; 566 struct ccb_data *data;
566 struct ilo_hwinfo *hw; 567 struct ilo_hwinfo *hw;
567 unsigned long flags; 568 unsigned long flags;
568 569
569 slot = iminor(ip) % MAX_CCB; 570 slot = iminor(ip) % max_ccb;
570 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); 571 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
571 572
572 /* new ccb allocation */ 573 /* new ccb allocation */
573 data = kzalloc(sizeof(*data), GFP_KERNEL); 574 data = kzalloc(sizeof(*data), GFP_KERNEL);
574 if (!data) 575 if (!data)
575 return -ENOMEM; 576 return -ENOMEM;
576 577
577 spin_lock(&hw->open_lock); 578 spin_lock(&hw->open_lock);
578 579
579 /* each fd private_data holds sw/hw view of ccb */ 580 /* each fd private_data holds sw/hw view of ccb */
580 if (hw->ccb_alloc[slot] == NULL) { 581 if (hw->ccb_alloc[slot] == NULL) {
581 /* create a channel control block for this minor */ 582 /* create a channel control block for this minor */
582 error = ilo_ccb_setup(hw, data, slot); 583 error = ilo_ccb_setup(hw, data, slot);
583 if (error) { 584 if (error) {
584 kfree(data); 585 kfree(data);
585 goto out; 586 goto out;
586 } 587 }
587 588
588 data->ccb_cnt = 1; 589 data->ccb_cnt = 1;
589 data->ccb_excl = fp->f_flags & O_EXCL; 590 data->ccb_excl = fp->f_flags & O_EXCL;
590 data->ilo_hw = hw; 591 data->ilo_hw = hw;
591 init_waitqueue_head(&data->ccb_waitq); 592 init_waitqueue_head(&data->ccb_waitq);
592 593
593 /* write the ccb to hw */ 594 /* write the ccb to hw */
594 spin_lock_irqsave(&hw->alloc_lock, flags); 595 spin_lock_irqsave(&hw->alloc_lock, flags);
595 ilo_ccb_open(hw, data, slot); 596 ilo_ccb_open(hw, data, slot);
596 hw->ccb_alloc[slot] = data; 597 hw->ccb_alloc[slot] = data;
597 spin_unlock_irqrestore(&hw->alloc_lock, flags); 598 spin_unlock_irqrestore(&hw->alloc_lock, flags);
598 599
599 /* make sure the channel is functional */ 600 /* make sure the channel is functional */
600 error = ilo_ccb_verify(hw, data); 601 error = ilo_ccb_verify(hw, data);
601 if (error) { 602 if (error) {
602 603
603 spin_lock_irqsave(&hw->alloc_lock, flags); 604 spin_lock_irqsave(&hw->alloc_lock, flags);
604 hw->ccb_alloc[slot] = NULL; 605 hw->ccb_alloc[slot] = NULL;
605 spin_unlock_irqrestore(&hw->alloc_lock, flags); 606 spin_unlock_irqrestore(&hw->alloc_lock, flags);
606 607
607 ilo_ccb_close(hw->ilo_dev, data); 608 ilo_ccb_close(hw->ilo_dev, data);
608 609
609 kfree(data); 610 kfree(data);
610 goto out; 611 goto out;
611 } 612 }
612 613
613 } else { 614 } else {
614 kfree(data); 615 kfree(data);
615 if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) { 616 if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
616 /* 617 /*
617 * The channel exists, and either this open 618 * The channel exists, and either this open
618 * or a previous open of this channel wants 619 * or a previous open of this channel wants
619 * exclusive access. 620 * exclusive access.
620 */ 621 */
621 error = -EBUSY; 622 error = -EBUSY;
622 } else { 623 } else {
623 hw->ccb_alloc[slot]->ccb_cnt++; 624 hw->ccb_alloc[slot]->ccb_cnt++;
624 error = 0; 625 error = 0;
625 } 626 }
626 } 627 }
627 out: 628 out:
628 spin_unlock(&hw->open_lock); 629 spin_unlock(&hw->open_lock);
629 630
630 if (!error) 631 if (!error)
631 fp->private_data = hw->ccb_alloc[slot]; 632 fp->private_data = hw->ccb_alloc[slot];
632 633
633 return error; 634 return error;
634 } 635 }
635 636
636 static const struct file_operations ilo_fops = { 637 static const struct file_operations ilo_fops = {
637 .owner = THIS_MODULE, 638 .owner = THIS_MODULE,
638 .read = ilo_read, 639 .read = ilo_read,
639 .write = ilo_write, 640 .write = ilo_write,
640 .poll = ilo_poll, 641 .poll = ilo_poll,
641 .open = ilo_open, 642 .open = ilo_open,
642 .release = ilo_close, 643 .release = ilo_close,
643 .llseek = noop_llseek, 644 .llseek = noop_llseek,
644 }; 645 };
645 646
646 static irqreturn_t ilo_isr(int irq, void *data) 647 static irqreturn_t ilo_isr(int irq, void *data)
647 { 648 {
648 struct ilo_hwinfo *hw = data; 649 struct ilo_hwinfo *hw = data;
649 int pending, i; 650 int pending, i;
650 651
651 spin_lock(&hw->alloc_lock); 652 spin_lock(&hw->alloc_lock);
652 653
653 /* check for ccbs which have data */ 654 /* check for ccbs which have data */
654 pending = get_device_outbound(hw); 655 pending = get_device_outbound(hw);
655 if (!pending) { 656 if (!pending) {
656 spin_unlock(&hw->alloc_lock); 657 spin_unlock(&hw->alloc_lock);
657 return IRQ_NONE; 658 return IRQ_NONE;
658 } 659 }
659 660
660 if (is_db_reset(pending)) { 661 if (is_db_reset(pending)) {
661 /* wake up all ccbs if the device was reset */ 662 /* wake up all ccbs if the device was reset */
662 pending = -1; 663 pending = -1;
663 ilo_set_reset(hw); 664 ilo_set_reset(hw);
664 } 665 }
665 666
666 for (i = 0; i < MAX_CCB; i++) { 667 for (i = 0; i < max_ccb; i++) {
667 if (!hw->ccb_alloc[i]) 668 if (!hw->ccb_alloc[i])
668 continue; 669 continue;
669 if (pending & (1 << i)) 670 if (pending & (1 << i))
670 wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq); 671 wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq);
671 } 672 }
672 673
673 /* clear the device of the channels that have been handled */ 674 /* clear the device of the channels that have been handled */
674 clear_pending_db(hw, pending); 675 clear_pending_db(hw, pending);
675 676
676 spin_unlock(&hw->alloc_lock); 677 spin_unlock(&hw->alloc_lock);
677 678
678 return IRQ_HANDLED; 679 return IRQ_HANDLED;
679 } 680 }
680 681
681 static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) 682 static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
682 { 683 {
683 pci_iounmap(pdev, hw->db_vaddr); 684 pci_iounmap(pdev, hw->db_vaddr);
684 pci_iounmap(pdev, hw->ram_vaddr); 685 pci_iounmap(pdev, hw->ram_vaddr);
685 pci_iounmap(pdev, hw->mmio_vaddr); 686 pci_iounmap(pdev, hw->mmio_vaddr);
686 } 687 }
687 688
688 static int __devinit ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) 689 static int __devinit ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
689 { 690 {
690 int error = -ENOMEM; 691 int error = -ENOMEM;
691 692
692 /* map the memory mapped i/o registers */ 693 /* map the memory mapped i/o registers */
693 hw->mmio_vaddr = pci_iomap(pdev, 1, 0); 694 hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
694 if (hw->mmio_vaddr == NULL) { 695 if (hw->mmio_vaddr == NULL) {
695 dev_err(&pdev->dev, "Error mapping mmio\n"); 696 dev_err(&pdev->dev, "Error mapping mmio\n");
696 goto out; 697 goto out;
697 } 698 }
698 699
699 /* map the adapter shared memory region */ 700 /* map the adapter shared memory region */
700 hw->ram_vaddr = pci_iomap(pdev, 2, MAX_CCB * ILOHW_CCB_SZ); 701 hw->ram_vaddr = pci_iomap(pdev, 2, max_ccb * ILOHW_CCB_SZ);
701 if (hw->ram_vaddr == NULL) { 702 if (hw->ram_vaddr == NULL) {
702 dev_err(&pdev->dev, "Error mapping shared mem\n"); 703 dev_err(&pdev->dev, "Error mapping shared mem\n");
703 goto mmio_free; 704 goto mmio_free;
704 } 705 }
705 706
706 /* map the doorbell aperture */ 707 /* map the doorbell aperture */
707 hw->db_vaddr = pci_iomap(pdev, 3, MAX_CCB * ONE_DB_SIZE); 708 hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE);
708 if (hw->db_vaddr == NULL) { 709 if (hw->db_vaddr == NULL) {
709 dev_err(&pdev->dev, "Error mapping doorbell\n"); 710 dev_err(&pdev->dev, "Error mapping doorbell\n");
710 goto ram_free; 711 goto ram_free;
711 } 712 }
712 713
713 return 0; 714 return 0;
714 ram_free: 715 ram_free:
715 pci_iounmap(pdev, hw->ram_vaddr); 716 pci_iounmap(pdev, hw->ram_vaddr);
716 mmio_free: 717 mmio_free:
717 pci_iounmap(pdev, hw->mmio_vaddr); 718 pci_iounmap(pdev, hw->mmio_vaddr);
718 out: 719 out:
719 return error; 720 return error;
720 } 721 }
721 722
722 static void ilo_remove(struct pci_dev *pdev) 723 static void ilo_remove(struct pci_dev *pdev)
723 { 724 {
724 int i, minor; 725 int i, minor;
725 struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev); 726 struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev);
726 727
727 clear_device(ilo_hw); 728 clear_device(ilo_hw);
728 729
729 minor = MINOR(ilo_hw->cdev.dev); 730 minor = MINOR(ilo_hw->cdev.dev);
730 for (i = minor; i < minor + MAX_CCB; i++) 731 for (i = minor; i < minor + max_ccb; i++)
731 device_destroy(ilo_class, MKDEV(ilo_major, i)); 732 device_destroy(ilo_class, MKDEV(ilo_major, i));
732 733
733 cdev_del(&ilo_hw->cdev); 734 cdev_del(&ilo_hw->cdev);
734 ilo_disable_interrupts(ilo_hw); 735 ilo_disable_interrupts(ilo_hw);
735 free_irq(pdev->irq, ilo_hw); 736 free_irq(pdev->irq, ilo_hw);
736 ilo_unmap_device(pdev, ilo_hw); 737 ilo_unmap_device(pdev, ilo_hw);
737 pci_release_regions(pdev); 738 pci_release_regions(pdev);
738 pci_disable_device(pdev); 739 pci_disable_device(pdev);
739 kfree(ilo_hw); 740 kfree(ilo_hw);
740 ilo_hwdev[(minor / MAX_CCB)] = 0; 741 ilo_hwdev[(minor / max_ccb)] = 0;
741 } 742 }
742 743
743 static int __devinit ilo_probe(struct pci_dev *pdev, 744 static int __devinit ilo_probe(struct pci_dev *pdev,
744 const struct pci_device_id *ent) 745 const struct pci_device_id *ent)
745 { 746 {
746 int devnum, minor, start, error; 747 int devnum, minor, start, error;
747 struct ilo_hwinfo *ilo_hw; 748 struct ilo_hwinfo *ilo_hw;
748 749
750 if (max_ccb > MAX_CCB)
751 max_ccb = MAX_CCB;
752 else if (max_ccb < MIN_CCB)
753 max_ccb = MIN_CCB;
754
749 /* find a free range for device files */ 755 /* find a free range for device files */
750 for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) { 756 for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) {
751 if (ilo_hwdev[devnum] == 0) { 757 if (ilo_hwdev[devnum] == 0) {
752 ilo_hwdev[devnum] = 1; 758 ilo_hwdev[devnum] = 1;
753 break; 759 break;
754 } 760 }
755 } 761 }
756 762
757 if (devnum == MAX_ILO_DEV) { 763 if (devnum == MAX_ILO_DEV) {
758 dev_err(&pdev->dev, "Error finding free device\n"); 764 dev_err(&pdev->dev, "Error finding free device\n");
759 return -ENODEV; 765 return -ENODEV;
760 } 766 }
761 767
762 /* track global allocations for this device */ 768 /* track global allocations for this device */
763 error = -ENOMEM; 769 error = -ENOMEM;
764 ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL); 770 ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL);
765 if (!ilo_hw) 771 if (!ilo_hw)
766 goto out; 772 goto out;
767 773
768 ilo_hw->ilo_dev = pdev; 774 ilo_hw->ilo_dev = pdev;
769 spin_lock_init(&ilo_hw->alloc_lock); 775 spin_lock_init(&ilo_hw->alloc_lock);
770 spin_lock_init(&ilo_hw->fifo_lock); 776 spin_lock_init(&ilo_hw->fifo_lock);
771 spin_lock_init(&ilo_hw->open_lock); 777 spin_lock_init(&ilo_hw->open_lock);
772 778
773 error = pci_enable_device(pdev); 779 error = pci_enable_device(pdev);
774 if (error) 780 if (error)
775 goto free; 781 goto free;
776 782
777 pci_set_master(pdev); 783 pci_set_master(pdev);
778 784
779 error = pci_request_regions(pdev, ILO_NAME); 785 error = pci_request_regions(pdev, ILO_NAME);
780 if (error) 786 if (error)
781 goto disable; 787 goto disable;
782 788
783 error = ilo_map_device(pdev, ilo_hw); 789 error = ilo_map_device(pdev, ilo_hw);
784 if (error) 790 if (error)
785 goto free_regions; 791 goto free_regions;
786 792
787 pci_set_drvdata(pdev, ilo_hw); 793 pci_set_drvdata(pdev, ilo_hw);
788 clear_device(ilo_hw); 794 clear_device(ilo_hw);
789 795
790 error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw); 796 error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw);
791 if (error) 797 if (error)
792 goto unmap; 798 goto unmap;
793 799
794 ilo_enable_interrupts(ilo_hw); 800 ilo_enable_interrupts(ilo_hw);
795 801
796 cdev_init(&ilo_hw->cdev, &ilo_fops); 802 cdev_init(&ilo_hw->cdev, &ilo_fops);
797 ilo_hw->cdev.owner = THIS_MODULE; 803 ilo_hw->cdev.owner = THIS_MODULE;
798 start = devnum * MAX_CCB; 804 start = devnum * max_ccb;
799 error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), MAX_CCB); 805 error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb);
800 if (error) { 806 if (error) {
801 dev_err(&pdev->dev, "Could not add cdev\n"); 807 dev_err(&pdev->dev, "Could not add cdev\n");
802 goto remove_isr; 808 goto remove_isr;
803 } 809 }
804 810
805 for (minor = 0 ; minor < MAX_CCB; minor++) { 811 for (minor = 0 ; minor < max_ccb; minor++) {
806 struct device *dev; 812 struct device *dev;
807 dev = device_create(ilo_class, &pdev->dev, 813 dev = device_create(ilo_class, &pdev->dev,
808 MKDEV(ilo_major, minor), NULL, 814 MKDEV(ilo_major, minor), NULL,
809 "hpilo!d%dccb%d", devnum, minor); 815 "hpilo!d%dccb%d", devnum, minor);
810 if (IS_ERR(dev)) 816 if (IS_ERR(dev))
811 dev_err(&pdev->dev, "Could not create files\n"); 817 dev_err(&pdev->dev, "Could not create files\n");
812 } 818 }
813 819
814 return 0; 820 return 0;
815 remove_isr: 821 remove_isr:
816 ilo_disable_interrupts(ilo_hw); 822 ilo_disable_interrupts(ilo_hw);
817 free_irq(pdev->irq, ilo_hw); 823 free_irq(pdev->irq, ilo_hw);
818 unmap: 824 unmap:
819 ilo_unmap_device(pdev, ilo_hw); 825 ilo_unmap_device(pdev, ilo_hw);
820 free_regions: 826 free_regions:
821 pci_release_regions(pdev); 827 pci_release_regions(pdev);
822 disable: 828 disable:
823 pci_disable_device(pdev); 829 pci_disable_device(pdev);
824 free: 830 free:
825 kfree(ilo_hw); 831 kfree(ilo_hw);
826 out: 832 out:
827 ilo_hwdev[devnum] = 0; 833 ilo_hwdev[devnum] = 0;
828 return error; 834 return error;
829 } 835 }
830 836
831 static struct pci_device_id ilo_devices[] = { 837 static struct pci_device_id ilo_devices[] = {
832 { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) }, 838 { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) },
833 { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) }, 839 { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) },
834 { } 840 { }
835 }; 841 };
836 MODULE_DEVICE_TABLE(pci, ilo_devices); 842 MODULE_DEVICE_TABLE(pci, ilo_devices);
837 843
838 static struct pci_driver ilo_driver = { 844 static struct pci_driver ilo_driver = {
839 .name = ILO_NAME, 845 .name = ILO_NAME,
840 .id_table = ilo_devices, 846 .id_table = ilo_devices,
841 .probe = ilo_probe, 847 .probe = ilo_probe,
842 .remove = __devexit_p(ilo_remove), 848 .remove = __devexit_p(ilo_remove),
843 }; 849 };
844 850
845 static int __init ilo_init(void) 851 static int __init ilo_init(void)
846 { 852 {
847 int error; 853 int error;
848 dev_t dev; 854 dev_t dev;
849 855
850 ilo_class = class_create(THIS_MODULE, "iLO"); 856 ilo_class = class_create(THIS_MODULE, "iLO");
851 if (IS_ERR(ilo_class)) { 857 if (IS_ERR(ilo_class)) {
852 error = PTR_ERR(ilo_class); 858 error = PTR_ERR(ilo_class);
853 goto out; 859 goto out;
854 } 860 }
855 861
856 error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME); 862 error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME);
857 if (error) 863 if (error)
858 goto class_destroy; 864 goto class_destroy;
859 865
860 ilo_major = MAJOR(dev); 866 ilo_major = MAJOR(dev);
861 867
862 error = pci_register_driver(&ilo_driver); 868 error = pci_register_driver(&ilo_driver);
863 if (error) 869 if (error)
864 goto chr_remove; 870 goto chr_remove;
865 871
866 return 0; 872 return 0;
867 chr_remove: 873 chr_remove:
868 unregister_chrdev_region(dev, MAX_OPEN); 874 unregister_chrdev_region(dev, MAX_OPEN);
869 class_destroy: 875 class_destroy:
870 class_destroy(ilo_class); 876 class_destroy(ilo_class);
871 out: 877 out:
872 return error; 878 return error;
873 } 879 }
874 880
875 static void __exit ilo_exit(void) 881 static void __exit ilo_exit(void)
876 { 882 {
877 pci_unregister_driver(&ilo_driver); 883 pci_unregister_driver(&ilo_driver);
878 unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN); 884 unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN);
879 class_destroy(ilo_class); 885 class_destroy(ilo_class);
880 } 886 }
881 887
882 MODULE_VERSION("1.2"); 888 MODULE_VERSION("1.3");
883 MODULE_ALIAS(ILO_NAME); 889 MODULE_ALIAS(ILO_NAME);
884 MODULE_DESCRIPTION(ILO_NAME); 890 MODULE_DESCRIPTION(ILO_NAME);
885 MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>"); 891 MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>");
886 MODULE_LICENSE("GPL v2"); 892 MODULE_LICENSE("GPL v2");
893
894 module_param(max_ccb, uint, 0444);
895 MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8)");
887 896
888 module_init(ilo_init); 897 module_init(ilo_init);
889 module_exit(ilo_exit); 898 module_exit(ilo_exit);
890 899
drivers/misc/hpilo.h
Diff comments   View file @ 98dcd59
1 /* 1 /*
2 * linux/drivers/char/hpilo.h 2 * linux/drivers/char/hpilo.h
3 * 3 *
4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. 4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
5 * David Altobelli <david.altobelli@hp.com> 5 * David Altobelli <david.altobelli@hp.com>
6 * 6 *
7 * This program is free software; you can redistribute it and/or modify 7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as 8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation. 9 * published by the Free Software Foundation.
10 */ 10 */
11 #ifndef __HPILO_H 11 #ifndef __HPILO_H
12 #define __HPILO_H 12 #define __HPILO_H
13 13
14 #define ILO_NAME "hpilo" 14 #define ILO_NAME "hpilo"
15 15
16 /* max number of open channel control blocks per device, hw limited to 32 */ 16 /* max number of open channel control blocks per device, hw limited to 32 */
17 #define MAX_CCB 8 17 #define MAX_CCB 24
18 /* min number of open channel control blocks per device, hw limited to 32 */
19 #define MIN_CCB 8
18 /* max number of supported devices */ 20 /* max number of supported devices */
19 #define MAX_ILO_DEV 1 21 #define MAX_ILO_DEV 1
20 /* max number of files */ 22 /* max number of files */
21 #define MAX_OPEN (MAX_CCB * MAX_ILO_DEV) 23 #define MAX_OPEN (MAX_CCB * MAX_ILO_DEV)
22 /* total wait time in usec */ 24 /* total wait time in usec */
23 #define MAX_WAIT_TIME 10000 25 #define MAX_WAIT_TIME 10000
24 /* per spin wait time in usec */ 26 /* per spin wait time in usec */
25 #define WAIT_TIME 10 27 #define WAIT_TIME 10
26 /* spin counter for open/close delay */ 28 /* spin counter for open/close delay */
27 #define MAX_WAIT (MAX_WAIT_TIME / WAIT_TIME) 29 #define MAX_WAIT (MAX_WAIT_TIME / WAIT_TIME)
28 30
29 /* 31 /*
30 * Per device, used to track global memory allocations. 32 * Per device, used to track global memory allocations.
31 */ 33 */
32 struct ilo_hwinfo { 34 struct ilo_hwinfo {
33 /* mmio registers on device */ 35 /* mmio registers on device */
34 char __iomem *mmio_vaddr; 36 char __iomem *mmio_vaddr;
35 37
36 /* doorbell registers on device */ 38 /* doorbell registers on device */
37 char __iomem *db_vaddr; 39 char __iomem *db_vaddr;
38 40
39 /* shared memory on device used for channel control blocks */ 41 /* shared memory on device used for channel control blocks */
40 char __iomem *ram_vaddr; 42 char __iomem *ram_vaddr;
41 43
42 /* files corresponding to this device */ 44 /* files corresponding to this device */
43 struct ccb_data *ccb_alloc[MAX_CCB]; 45 struct ccb_data *ccb_alloc[MAX_CCB];
44 46
45 struct pci_dev *ilo_dev; 47 struct pci_dev *ilo_dev;
46 48
47 /* 49 /*
48 * open_lock serializes ccb_cnt during open and close 50 * open_lock serializes ccb_cnt during open and close
49 * [ irq disabled ] 51 * [ irq disabled ]
50 * -> alloc_lock used when adding/removing/searching ccb_alloc, 52 * -> alloc_lock used when adding/removing/searching ccb_alloc,
51 * which represents all ccbs open on the device 53 * which represents all ccbs open on the device
52 * --> fifo_lock controls access to fifo queues shared with hw 54 * --> fifo_lock controls access to fifo queues shared with hw
53 * 55 *
54 * Locks must be taken in this order, but open_lock and alloc_lock 56 * Locks must be taken in this order, but open_lock and alloc_lock
55 * are optional, they do not need to be held in order to take a 57 * are optional, they do not need to be held in order to take a
56 * lower level lock. 58 * lower level lock.
57 */ 59 */
58 spinlock_t open_lock; 60 spinlock_t open_lock;
59 spinlock_t alloc_lock; 61 spinlock_t alloc_lock;
60 spinlock_t fifo_lock; 62 spinlock_t fifo_lock;
61 63
62 struct cdev cdev; 64 struct cdev cdev;
63 }; 65 };
64 66
65 /* offset from mmio_vaddr for enabling doorbell interrupts */ 67 /* offset from mmio_vaddr for enabling doorbell interrupts */
66 #define DB_IRQ 0xB2 68 #define DB_IRQ 0xB2
67 /* offset from mmio_vaddr for outbound communications */ 69 /* offset from mmio_vaddr for outbound communications */
68 #define DB_OUT 0xD4 70 #define DB_OUT 0xD4
69 /* DB_OUT reset bit */ 71 /* DB_OUT reset bit */
70 #define DB_RESET 26 72 #define DB_RESET 26
71 73
72 /* 74 /*
73 * Channel control block. Used to manage hardware queues. 75 * Channel control block. Used to manage hardware queues.
74 * The format must match hw's version. The hw ccb is 128 bytes, 76 * The format must match hw's version. The hw ccb is 128 bytes,
75 * but the context area shouldn't be touched by the driver. 77 * but the context area shouldn't be touched by the driver.
76 */ 78 */
77 #define ILOSW_CCB_SZ 64 79 #define ILOSW_CCB_SZ 64
78 #define ILOHW_CCB_SZ 128 80 #define ILOHW_CCB_SZ 128
79 struct ccb { 81 struct ccb {
80 union { 82 union {
81 char *send_fifobar; 83 char *send_fifobar;
82 u64 send_fifobar_pa; 84 u64 send_fifobar_pa;
83 } ccb_u1; 85 } ccb_u1;
84 union { 86 union {
85 char *send_desc; 87 char *send_desc;
86 u64 send_desc_pa; 88 u64 send_desc_pa;
87 } ccb_u2; 89 } ccb_u2;
88 u64 send_ctrl; 90 u64 send_ctrl;
89 91
90 union { 92 union {
91 char *recv_fifobar; 93 char *recv_fifobar;
92 u64 recv_fifobar_pa; 94 u64 recv_fifobar_pa;
93 } ccb_u3; 95 } ccb_u3;
94 union { 96 union {
95 char *recv_desc; 97 char *recv_desc;
96 u64 recv_desc_pa; 98 u64 recv_desc_pa;
97 } ccb_u4; 99 } ccb_u4;
98 u64 recv_ctrl; 100 u64 recv_ctrl;
99 101
100 union { 102 union {
101 char __iomem *db_base; 103 char __iomem *db_base;
102 u64 padding5; 104 u64 padding5;
103 } ccb_u5; 105 } ccb_u5;
104 106
105 u64 channel; 107 u64 channel;
106 108
107 /* unused context area (64 bytes) */ 109 /* unused context area (64 bytes) */
108 }; 110 };
109 111
110 /* ccb queue parameters */ 112 /* ccb queue parameters */
111 #define SENDQ 1 113 #define SENDQ 1
112 #define RECVQ 2 114 #define RECVQ 2
113 #define NR_QENTRY 4 115 #define NR_QENTRY 4
114 #define L2_QENTRY_SZ 12 116 #define L2_QENTRY_SZ 12
115 117
116 /* ccb ctrl bitfields */ 118 /* ccb ctrl bitfields */
117 #define CTRL_BITPOS_L2SZ 0 119 #define CTRL_BITPOS_L2SZ 0
118 #define CTRL_BITPOS_FIFOINDEXMASK 4 120 #define CTRL_BITPOS_FIFOINDEXMASK 4
119 #define CTRL_BITPOS_DESCLIMIT 18 121 #define CTRL_BITPOS_DESCLIMIT 18
120 #define CTRL_BITPOS_A 30 122 #define CTRL_BITPOS_A 30
121 #define CTRL_BITPOS_G 31 123 #define CTRL_BITPOS_G 31
122 124
123 /* ccb doorbell macros */ 125 /* ccb doorbell macros */
124 #define L2_DB_SIZE 14 126 #define L2_DB_SIZE 14
125 #define ONE_DB_SIZE (1 << L2_DB_SIZE) 127 #define ONE_DB_SIZE (1 << L2_DB_SIZE)
126 128
127 /* 129 /*
128 * Per fd structure used to track the ccb allocated to that dev file. 130 * Per fd structure used to track the ccb allocated to that dev file.
129 */ 131 */
130 struct ccb_data { 132 struct ccb_data {
131 /* software version of ccb, using virtual addrs */ 133 /* software version of ccb, using virtual addrs */
132 struct ccb driver_ccb; 134 struct ccb driver_ccb;
133 135
134 /* hardware version of ccb, using physical addrs */ 136 /* hardware version of ccb, using physical addrs */
135 struct ccb ilo_ccb; 137 struct ccb ilo_ccb;
136 138
137 /* hardware ccb is written to this shared mapped device memory */ 139 /* hardware ccb is written to this shared mapped device memory */
138 struct ccb __iomem *mapped_ccb; 140 struct ccb __iomem *mapped_ccb;
139 141
140 /* dma'able memory used for send/recv queues */ 142 /* dma'able memory used for send/recv queues */
141 void *dma_va; 143 void *dma_va;
142 dma_addr_t dma_pa; 144 dma_addr_t dma_pa;
143 size_t dma_size; 145 size_t dma_size;
144 146
145 /* pointer to hardware device info */ 147 /* pointer to hardware device info */
146 struct ilo_hwinfo *ilo_hw; 148 struct ilo_hwinfo *ilo_hw;
147 149
148 /* queue for this ccb to wait for recv data */ 150 /* queue for this ccb to wait for recv data */
149 wait_queue_head_t ccb_waitq; 151 wait_queue_head_t ccb_waitq;
150 152
151 /* usage count, to allow for shared ccb's */ 153 /* usage count, to allow for shared ccb's */
152 int ccb_cnt; 154 int ccb_cnt;
153 155
154 /* open wanted exclusive access to this ccb */ 156 /* open wanted exclusive access to this ccb */
155 int ccb_excl; 157 int ccb_excl;
156 }; 158 };
157 159
158 /* 160 /*
159 * FIFO queue structure, shared with hw. 161 * FIFO queue structure, shared with hw.
160 */ 162 */
161 #define ILO_START_ALIGN 4096 163 #define ILO_START_ALIGN 4096
162 #define ILO_CACHE_SZ 128 164 #define ILO_CACHE_SZ 128
163 struct fifo { 165 struct fifo {
164 u64 nrents; /* user requested number of fifo entries */ 166 u64 nrents; /* user requested number of fifo entries */
165 u64 imask; /* mask to extract valid fifo index */ 167 u64 imask; /* mask to extract valid fifo index */
166 u64 merge; /* O/C bits to merge in during enqueue operation */ 168 u64 merge; /* O/C bits to merge in during enqueue operation */
167 u64 reset; /* set to non-zero when the target device resets */ 169 u64 reset; /* set to non-zero when the target device resets */
168 u8 pad_0[ILO_CACHE_SZ - (sizeof(u64) * 4)]; 170 u8 pad_0[ILO_CACHE_SZ - (sizeof(u64) * 4)];
169 171
170 u64 head; 172 u64 head;
171 u8 pad_1[ILO_CACHE_SZ - (sizeof(u64))]; 173 u8 pad_1[ILO_CACHE_SZ - (sizeof(u64))];
172 174
173 u64 tail; 175 u64 tail;
174 u8 pad_2[ILO_CACHE_SZ - (sizeof(u64))]; 176 u8 pad_2[ILO_CACHE_SZ - (sizeof(u64))];
175 177
176 u64 fifobar[1]; 178 u64 fifobar[1];
177 }; 179 };
178 180
179 /* convert between struct fifo, and the fifobar, which is saved in the ccb */ 181 /* convert between struct fifo, and the fifobar, which is saved in the ccb */
180 #define FIFOHANDLESIZE (sizeof(struct fifo) - sizeof(u64)) 182 #define FIFOHANDLESIZE (sizeof(struct fifo) - sizeof(u64))
181 #define FIFOBARTOHANDLE(_fifo) \ 183 #define FIFOBARTOHANDLE(_fifo) \
182 ((struct fifo *)(((char *)(_fifo)) - FIFOHANDLESIZE)) 184 ((struct fifo *)(((char *)(_fifo)) - FIFOHANDLESIZE))
183 185
184 /* the number of qwords to consume from the entry descriptor */ 186 /* the number of qwords to consume from the entry descriptor */
185 #define ENTRY_BITPOS_QWORDS 0 187 #define ENTRY_BITPOS_QWORDS 0
186 /* descriptor index number (within a specified queue) */ 188 /* descriptor index number (within a specified queue) */
187 #define ENTRY_BITPOS_DESCRIPTOR 10 189 #define ENTRY_BITPOS_DESCRIPTOR 10
188 /* state bit, fifo entry consumed by consumer */ 190 /* state bit, fifo entry consumed by consumer */
189 #define ENTRY_BITPOS_C 22 191 #define ENTRY_BITPOS_C 22
190 /* state bit, fifo entry is occupied */ 192 /* state bit, fifo entry is occupied */
191 #define ENTRY_BITPOS_O 23 193 #define ENTRY_BITPOS_O 23
192 194
193 #define ENTRY_BITS_QWORDS 10 195 #define ENTRY_BITS_QWORDS 10
194 #define ENTRY_BITS_DESCRIPTOR 12 196 #define ENTRY_BITS_DESCRIPTOR 12
195 #define ENTRY_BITS_C 1 197 #define ENTRY_BITS_C 1
196 #define ENTRY_BITS_O 1 198 #define ENTRY_BITS_O 1
197 #define ENTRY_BITS_TOTAL \ 199 #define ENTRY_BITS_TOTAL \
198 (ENTRY_BITS_C + ENTRY_BITS_O + \ 200 (ENTRY_BITS_C + ENTRY_BITS_O + \
199 ENTRY_BITS_QWORDS + ENTRY_BITS_DESCRIPTOR) 201 ENTRY_BITS_QWORDS + ENTRY_BITS_DESCRIPTOR)
200 202
201 /* extract various entry fields */ 203 /* extract various entry fields */
202 #define ENTRY_MASK ((1 << ENTRY_BITS_TOTAL) - 1) 204 #define ENTRY_MASK ((1 << ENTRY_BITS_TOTAL) - 1)
203 #define ENTRY_MASK_C (((1 << ENTRY_BITS_C) - 1) << ENTRY_BITPOS_C) 205 #define ENTRY_MASK_C (((1 << ENTRY_BITS_C) - 1) << ENTRY_BITPOS_C)
204 #define ENTRY_MASK_O (((1 << ENTRY_BITS_O) - 1) << ENTRY_BITPOS_O) 206 #define ENTRY_MASK_O (((1 << ENTRY_BITS_O) - 1) << ENTRY_BITPOS_O)
205 #define ENTRY_MASK_QWORDS \ 207 #define ENTRY_MASK_QWORDS \
206 (((1 << ENTRY_BITS_QWORDS) - 1) << ENTRY_BITPOS_QWORDS) 208 (((1 << ENTRY_BITS_QWORDS) - 1) << ENTRY_BITPOS_QWORDS)
207 #define ENTRY_MASK_DESCRIPTOR \ 209 #define ENTRY_MASK_DESCRIPTOR \
208 (((1 << ENTRY_BITS_DESCRIPTOR) - 1) << ENTRY_BITPOS_DESCRIPTOR) 210 (((1 << ENTRY_BITS_DESCRIPTOR) - 1) << ENTRY_BITPOS_DESCRIPTOR)
209 211
210 #define ENTRY_MASK_NOSTATE (ENTRY_MASK >> (ENTRY_BITS_C + ENTRY_BITS_O)) 212 #define ENTRY_MASK_NOSTATE (ENTRY_MASK >> (ENTRY_BITS_C + ENTRY_BITS_O))
211 213
212 #endif /* __HPILO_H */ 214 #endif /* __HPILO_H */
213 215