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Commit 5878730be4e3d0c9527d6f2f688874e38acacc98

Authored by Joe Perches
Committed by Stefan Richter
1 parent 60a74a6ff8
Exists in master and in 7 other branches imx_3.0.35_4.1.0, 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, smarc-l5.0.0_1.0.0-ga

firewire: core: Update WARN uses 

Add missing newlines.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

Showing 1 changed file with 3 additions and 3 deletions Inline Diff

drivers/firewire/core-transaction.c
Diff comments   View file @ 5878730
1 /* 1 /*
2 * Core IEEE1394 transaction logic 2 * Core IEEE1394 transaction logic
3 * 3 *
4 * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net> 4 * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net>
5 * 5 *
6 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or 8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version. 9 * (at your option) any later version.
10 * 10 *
11 * This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details. 14 * GNU General Public License for more details.
15 * 15 *
16 * You should have received a copy of the GNU General Public License 16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation, 17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */ 19 */
20 20
21 #include <linux/bug.h> 21 #include <linux/bug.h>
22 #include <linux/completion.h> 22 #include <linux/completion.h>
23 #include <linux/device.h> 23 #include <linux/device.h>
24 #include <linux/errno.h> 24 #include <linux/errno.h>
25 #include <linux/firewire.h> 25 #include <linux/firewire.h>
26 #include <linux/firewire-constants.h> 26 #include <linux/firewire-constants.h>
27 #include <linux/fs.h> 27 #include <linux/fs.h>
28 #include <linux/init.h> 28 #include <linux/init.h>
29 #include <linux/idr.h> 29 #include <linux/idr.h>
30 #include <linux/jiffies.h> 30 #include <linux/jiffies.h>
31 #include <linux/kernel.h> 31 #include <linux/kernel.h>
32 #include <linux/list.h> 32 #include <linux/list.h>
33 #include <linux/module.h> 33 #include <linux/module.h>
34 #include <linux/slab.h> 34 #include <linux/slab.h>
35 #include <linux/spinlock.h> 35 #include <linux/spinlock.h>
36 #include <linux/string.h> 36 #include <linux/string.h>
37 #include <linux/timer.h> 37 #include <linux/timer.h>
38 #include <linux/types.h> 38 #include <linux/types.h>
39 39
40 #include <asm/byteorder.h> 40 #include <asm/byteorder.h>
41 41
42 #include "core.h" 42 #include "core.h"
43 43
44 #define HEADER_PRI(pri) ((pri) << 0) 44 #define HEADER_PRI(pri) ((pri) << 0)
45 #define HEADER_TCODE(tcode) ((tcode) << 4) 45 #define HEADER_TCODE(tcode) ((tcode) << 4)
46 #define HEADER_RETRY(retry) ((retry) << 8) 46 #define HEADER_RETRY(retry) ((retry) << 8)
47 #define HEADER_TLABEL(tlabel) ((tlabel) << 10) 47 #define HEADER_TLABEL(tlabel) ((tlabel) << 10)
48 #define HEADER_DESTINATION(destination) ((destination) << 16) 48 #define HEADER_DESTINATION(destination) ((destination) << 16)
49 #define HEADER_SOURCE(source) ((source) << 16) 49 #define HEADER_SOURCE(source) ((source) << 16)
50 #define HEADER_RCODE(rcode) ((rcode) << 12) 50 #define HEADER_RCODE(rcode) ((rcode) << 12)
51 #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) 51 #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
52 #define HEADER_DATA_LENGTH(length) ((length) << 16) 52 #define HEADER_DATA_LENGTH(length) ((length) << 16)
53 #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) 53 #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
54 54
55 #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) 55 #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
56 #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) 56 #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
57 #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) 57 #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
58 #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) 58 #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
59 #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) 59 #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
60 #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) 60 #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
61 #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) 61 #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
62 #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) 62 #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
63 63
64 #define HEADER_DESTINATION_IS_BROADCAST(q) \ 64 #define HEADER_DESTINATION_IS_BROADCAST(q) \
65 (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f)) 65 (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f))
66 66
67 #define PHY_PACKET_CONFIG 0x0 67 #define PHY_PACKET_CONFIG 0x0
68 #define PHY_PACKET_LINK_ON 0x1 68 #define PHY_PACKET_LINK_ON 0x1
69 #define PHY_PACKET_SELF_ID 0x2 69 #define PHY_PACKET_SELF_ID 0x2
70 70
71 #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) 71 #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
72 #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) 72 #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
73 #define PHY_IDENTIFIER(id) ((id) << 30) 73 #define PHY_IDENTIFIER(id) ((id) << 30)
74 74
75 static int close_transaction(struct fw_transaction *transaction, 75 static int close_transaction(struct fw_transaction *transaction,
76 struct fw_card *card, int rcode) 76 struct fw_card *card, int rcode)
77 { 77 {
78 struct fw_transaction *t; 78 struct fw_transaction *t;
79 unsigned long flags; 79 unsigned long flags;
80 80
81 spin_lock_irqsave(&card->lock, flags); 81 spin_lock_irqsave(&card->lock, flags);
82 list_for_each_entry(t, &card->transaction_list, link) { 82 list_for_each_entry(t, &card->transaction_list, link) {
83 if (t == transaction) { 83 if (t == transaction) {
84 if (!del_timer(&t->split_timeout_timer)) { 84 if (!del_timer(&t->split_timeout_timer)) {
85 spin_unlock_irqrestore(&card->lock, flags); 85 spin_unlock_irqrestore(&card->lock, flags);
86 goto timed_out; 86 goto timed_out;
87 } 87 }
88 list_del_init(&t->link); 88 list_del_init(&t->link);
89 card->tlabel_mask &= ~(1ULL << t->tlabel); 89 card->tlabel_mask &= ~(1ULL << t->tlabel);
90 break; 90 break;
91 } 91 }
92 } 92 }
93 spin_unlock_irqrestore(&card->lock, flags); 93 spin_unlock_irqrestore(&card->lock, flags);
94 94
95 if (&t->link != &card->transaction_list) { 95 if (&t->link != &card->transaction_list) {
96 t->callback(card, rcode, NULL, 0, t->callback_data); 96 t->callback(card, rcode, NULL, 0, t->callback_data);
97 return 0; 97 return 0;
98 } 98 }
99 99
100 timed_out: 100 timed_out:
101 return -ENOENT; 101 return -ENOENT;
102 } 102 }
103 103
104 /* 104 /*
105 * Only valid for transactions that are potentially pending (ie have 105 * Only valid for transactions that are potentially pending (ie have
106 * been sent). 106 * been sent).
107 */ 107 */
108 int fw_cancel_transaction(struct fw_card *card, 108 int fw_cancel_transaction(struct fw_card *card,
109 struct fw_transaction *transaction) 109 struct fw_transaction *transaction)
110 { 110 {
111 /* 111 /*
112 * Cancel the packet transmission if it's still queued. That 112 * Cancel the packet transmission if it's still queued. That
113 * will call the packet transmission callback which cancels 113 * will call the packet transmission callback which cancels
114 * the transaction. 114 * the transaction.
115 */ 115 */
116 116
117 if (card->driver->cancel_packet(card, &transaction->packet) == 0) 117 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
118 return 0; 118 return 0;
119 119
120 /* 120 /*
121 * If the request packet has already been sent, we need to see 121 * If the request packet has already been sent, we need to see
122 * if the transaction is still pending and remove it in that case. 122 * if the transaction is still pending and remove it in that case.
123 */ 123 */
124 124
125 return close_transaction(transaction, card, RCODE_CANCELLED); 125 return close_transaction(transaction, card, RCODE_CANCELLED);
126 } 126 }
127 EXPORT_SYMBOL(fw_cancel_transaction); 127 EXPORT_SYMBOL(fw_cancel_transaction);
128 128
129 static void split_transaction_timeout_callback(unsigned long data) 129 static void split_transaction_timeout_callback(unsigned long data)
130 { 130 {
131 struct fw_transaction *t = (struct fw_transaction *)data; 131 struct fw_transaction *t = (struct fw_transaction *)data;
132 struct fw_card *card = t->card; 132 struct fw_card *card = t->card;
133 unsigned long flags; 133 unsigned long flags;
134 134
135 spin_lock_irqsave(&card->lock, flags); 135 spin_lock_irqsave(&card->lock, flags);
136 if (list_empty(&t->link)) { 136 if (list_empty(&t->link)) {
137 spin_unlock_irqrestore(&card->lock, flags); 137 spin_unlock_irqrestore(&card->lock, flags);
138 return; 138 return;
139 } 139 }
140 list_del(&t->link); 140 list_del(&t->link);
141 card->tlabel_mask &= ~(1ULL << t->tlabel); 141 card->tlabel_mask &= ~(1ULL << t->tlabel);
142 spin_unlock_irqrestore(&card->lock, flags); 142 spin_unlock_irqrestore(&card->lock, flags);
143 143
144 card->driver->cancel_packet(card, &t->packet); 144 card->driver->cancel_packet(card, &t->packet);
145 145
146 /* 146 /*
147 * At this point cancel_packet will never call the transaction 147 * At this point cancel_packet will never call the transaction
148 * callback, since we just took the transaction out of the list. 148 * callback, since we just took the transaction out of the list.
149 * So do it here. 149 * So do it here.
150 */ 150 */
151 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); 151 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
152 } 152 }
153 153
154 static void transmit_complete_callback(struct fw_packet *packet, 154 static void transmit_complete_callback(struct fw_packet *packet,
155 struct fw_card *card, int status) 155 struct fw_card *card, int status)
156 { 156 {
157 struct fw_transaction *t = 157 struct fw_transaction *t =
158 container_of(packet, struct fw_transaction, packet); 158 container_of(packet, struct fw_transaction, packet);
159 159
160 switch (status) { 160 switch (status) {
161 case ACK_COMPLETE: 161 case ACK_COMPLETE:
162 close_transaction(t, card, RCODE_COMPLETE); 162 close_transaction(t, card, RCODE_COMPLETE);
163 break; 163 break;
164 case ACK_PENDING: 164 case ACK_PENDING:
165 t->timestamp = packet->timestamp; 165 t->timestamp = packet->timestamp;
166 break; 166 break;
167 case ACK_BUSY_X: 167 case ACK_BUSY_X:
168 case ACK_BUSY_A: 168 case ACK_BUSY_A:
169 case ACK_BUSY_B: 169 case ACK_BUSY_B:
170 close_transaction(t, card, RCODE_BUSY); 170 close_transaction(t, card, RCODE_BUSY);
171 break; 171 break;
172 case ACK_DATA_ERROR: 172 case ACK_DATA_ERROR:
173 close_transaction(t, card, RCODE_DATA_ERROR); 173 close_transaction(t, card, RCODE_DATA_ERROR);
174 break; 174 break;
175 case ACK_TYPE_ERROR: 175 case ACK_TYPE_ERROR:
176 close_transaction(t, card, RCODE_TYPE_ERROR); 176 close_transaction(t, card, RCODE_TYPE_ERROR);
177 break; 177 break;
178 default: 178 default:
179 /* 179 /*
180 * In this case the ack is really a juju specific 180 * In this case the ack is really a juju specific
181 * rcode, so just forward that to the callback. 181 * rcode, so just forward that to the callback.
182 */ 182 */
183 close_transaction(t, card, status); 183 close_transaction(t, card, status);
184 break; 184 break;
185 } 185 }
186 } 186 }
187 187
188 static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, 188 static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
189 int destination_id, int source_id, int generation, int speed, 189 int destination_id, int source_id, int generation, int speed,
190 unsigned long long offset, void *payload, size_t length) 190 unsigned long long offset, void *payload, size_t length)
191 { 191 {
192 int ext_tcode; 192 int ext_tcode;
193 193
194 if (tcode == TCODE_STREAM_DATA) { 194 if (tcode == TCODE_STREAM_DATA) {
195 packet->header[0] = 195 packet->header[0] =
196 HEADER_DATA_LENGTH(length) | 196 HEADER_DATA_LENGTH(length) |
197 destination_id | 197 destination_id |
198 HEADER_TCODE(TCODE_STREAM_DATA); 198 HEADER_TCODE(TCODE_STREAM_DATA);
199 packet->header_length = 4; 199 packet->header_length = 4;
200 packet->payload = payload; 200 packet->payload = payload;
201 packet->payload_length = length; 201 packet->payload_length = length;
202 202
203 goto common; 203 goto common;
204 } 204 }
205 205
206 if (tcode > 0x10) { 206 if (tcode > 0x10) {
207 ext_tcode = tcode & ~0x10; 207 ext_tcode = tcode & ~0x10;
208 tcode = TCODE_LOCK_REQUEST; 208 tcode = TCODE_LOCK_REQUEST;
209 } else 209 } else
210 ext_tcode = 0; 210 ext_tcode = 0;
211 211
212 packet->header[0] = 212 packet->header[0] =
213 HEADER_RETRY(RETRY_X) | 213 HEADER_RETRY(RETRY_X) |
214 HEADER_TLABEL(tlabel) | 214 HEADER_TLABEL(tlabel) |
215 HEADER_TCODE(tcode) | 215 HEADER_TCODE(tcode) |
216 HEADER_DESTINATION(destination_id); 216 HEADER_DESTINATION(destination_id);
217 packet->header[1] = 217 packet->header[1] =
218 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); 218 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
219 packet->header[2] = 219 packet->header[2] =
220 offset; 220 offset;
221 221
222 switch (tcode) { 222 switch (tcode) {
223 case TCODE_WRITE_QUADLET_REQUEST: 223 case TCODE_WRITE_QUADLET_REQUEST:
224 packet->header[3] = *(u32 *)payload; 224 packet->header[3] = *(u32 *)payload;
225 packet->header_length = 16; 225 packet->header_length = 16;
226 packet->payload_length = 0; 226 packet->payload_length = 0;
227 break; 227 break;
228 228
229 case TCODE_LOCK_REQUEST: 229 case TCODE_LOCK_REQUEST:
230 case TCODE_WRITE_BLOCK_REQUEST: 230 case TCODE_WRITE_BLOCK_REQUEST:
231 packet->header[3] = 231 packet->header[3] =
232 HEADER_DATA_LENGTH(length) | 232 HEADER_DATA_LENGTH(length) |
233 HEADER_EXTENDED_TCODE(ext_tcode); 233 HEADER_EXTENDED_TCODE(ext_tcode);
234 packet->header_length = 16; 234 packet->header_length = 16;
235 packet->payload = payload; 235 packet->payload = payload;
236 packet->payload_length = length; 236 packet->payload_length = length;
237 break; 237 break;
238 238
239 case TCODE_READ_QUADLET_REQUEST: 239 case TCODE_READ_QUADLET_REQUEST:
240 packet->header_length = 12; 240 packet->header_length = 12;
241 packet->payload_length = 0; 241 packet->payload_length = 0;
242 break; 242 break;
243 243
244 case TCODE_READ_BLOCK_REQUEST: 244 case TCODE_READ_BLOCK_REQUEST:
245 packet->header[3] = 245 packet->header[3] =
246 HEADER_DATA_LENGTH(length) | 246 HEADER_DATA_LENGTH(length) |
247 HEADER_EXTENDED_TCODE(ext_tcode); 247 HEADER_EXTENDED_TCODE(ext_tcode);
248 packet->header_length = 16; 248 packet->header_length = 16;
249 packet->payload_length = 0; 249 packet->payload_length = 0;
250 break; 250 break;
251 251
252 default: 252 default:
253 WARN(1, "wrong tcode %d", tcode); 253 WARN(1, "wrong tcode %d\n", tcode);
254 } 254 }
255 common: 255 common:
256 packet->speed = speed; 256 packet->speed = speed;
257 packet->generation = generation; 257 packet->generation = generation;
258 packet->ack = 0; 258 packet->ack = 0;
259 packet->payload_mapped = false; 259 packet->payload_mapped = false;
260 } 260 }
261 261
262 static int allocate_tlabel(struct fw_card *card) 262 static int allocate_tlabel(struct fw_card *card)
263 { 263 {
264 int tlabel; 264 int tlabel;
265 265
266 tlabel = card->current_tlabel; 266 tlabel = card->current_tlabel;
267 while (card->tlabel_mask & (1ULL << tlabel)) { 267 while (card->tlabel_mask & (1ULL << tlabel)) {
268 tlabel = (tlabel + 1) & 0x3f; 268 tlabel = (tlabel + 1) & 0x3f;
269 if (tlabel == card->current_tlabel) 269 if (tlabel == card->current_tlabel)
270 return -EBUSY; 270 return -EBUSY;
271 } 271 }
272 272
273 card->current_tlabel = (tlabel + 1) & 0x3f; 273 card->current_tlabel = (tlabel + 1) & 0x3f;
274 card->tlabel_mask |= 1ULL << tlabel; 274 card->tlabel_mask |= 1ULL << tlabel;
275 275
276 return tlabel; 276 return tlabel;
277 } 277 }
278 278
279 /** 279 /**
280 * fw_send_request() - submit a request packet for transmission 280 * fw_send_request() - submit a request packet for transmission
281 * @card: interface to send the request at 281 * @card: interface to send the request at
282 * @t: transaction instance to which the request belongs 282 * @t: transaction instance to which the request belongs
283 * @tcode: transaction code 283 * @tcode: transaction code
284 * @destination_id: destination node ID, consisting of bus_ID and phy_ID 284 * @destination_id: destination node ID, consisting of bus_ID and phy_ID
285 * @generation: bus generation in which request and response are valid 285 * @generation: bus generation in which request and response are valid
286 * @speed: transmission speed 286 * @speed: transmission speed
287 * @offset: 48bit wide offset into destination's address space 287 * @offset: 48bit wide offset into destination's address space
288 * @payload: data payload for the request subaction 288 * @payload: data payload for the request subaction
289 * @length: length of the payload, in bytes 289 * @length: length of the payload, in bytes
290 * @callback: function to be called when the transaction is completed 290 * @callback: function to be called when the transaction is completed
291 * @callback_data: data to be passed to the transaction completion callback 291 * @callback_data: data to be passed to the transaction completion callback
292 * 292 *
293 * Submit a request packet into the asynchronous request transmission queue. 293 * Submit a request packet into the asynchronous request transmission queue.
294 * Can be called from atomic context. If you prefer a blocking API, use 294 * Can be called from atomic context. If you prefer a blocking API, use
295 * fw_run_transaction() in a context that can sleep. 295 * fw_run_transaction() in a context that can sleep.
296 * 296 *
297 * In case of lock requests, specify one of the firewire-core specific %TCODE_ 297 * In case of lock requests, specify one of the firewire-core specific %TCODE_
298 * constants instead of %TCODE_LOCK_REQUEST in @tcode. 298 * constants instead of %TCODE_LOCK_REQUEST in @tcode.
299 * 299 *
300 * Make sure that the value in @destination_id is not older than the one in 300 * Make sure that the value in @destination_id is not older than the one in
301 * @generation. Otherwise the request is in danger to be sent to a wrong node. 301 * @generation. Otherwise the request is in danger to be sent to a wrong node.
302 * 302 *
303 * In case of asynchronous stream packets i.e. %TCODE_STREAM_DATA, the caller 303 * In case of asynchronous stream packets i.e. %TCODE_STREAM_DATA, the caller
304 * needs to synthesize @destination_id with fw_stream_packet_destination_id(). 304 * needs to synthesize @destination_id with fw_stream_packet_destination_id().
305 * It will contain tag, channel, and sy data instead of a node ID then. 305 * It will contain tag, channel, and sy data instead of a node ID then.
306 * 306 *
307 * The payload buffer at @data is going to be DMA-mapped except in case of 307 * The payload buffer at @data is going to be DMA-mapped except in case of
308 * quadlet-sized payload or of local (loopback) requests. Hence make sure that 308 * quadlet-sized payload or of local (loopback) requests. Hence make sure that
309 * the buffer complies with the restrictions for DMA-mapped memory. The 309 * the buffer complies with the restrictions for DMA-mapped memory. The
310 * @payload must not be freed before the @callback is called. 310 * @payload must not be freed before the @callback is called.
311 * 311 *
312 * In case of request types without payload, @data is NULL and @length is 0. 312 * In case of request types without payload, @data is NULL and @length is 0.
313 * 313 *
314 * After the transaction is completed successfully or unsuccessfully, the 314 * After the transaction is completed successfully or unsuccessfully, the
315 * @callback will be called. Among its parameters is the response code which 315 * @callback will be called. Among its parameters is the response code which
316 * is either one of the rcodes per IEEE 1394 or, in case of internal errors, 316 * is either one of the rcodes per IEEE 1394 or, in case of internal errors,
317 * the firewire-core specific %RCODE_SEND_ERROR. The other firewire-core 317 * the firewire-core specific %RCODE_SEND_ERROR. The other firewire-core
318 * specific rcodes (%RCODE_CANCELLED, %RCODE_BUSY, %RCODE_GENERATION, 318 * specific rcodes (%RCODE_CANCELLED, %RCODE_BUSY, %RCODE_GENERATION,
319 * %RCODE_NO_ACK) denote transaction timeout, busy responder, stale request 319 * %RCODE_NO_ACK) denote transaction timeout, busy responder, stale request
320 * generation, or missing ACK respectively. 320 * generation, or missing ACK respectively.
321 * 321 *
322 * Note some timing corner cases: fw_send_request() may complete much earlier 322 * Note some timing corner cases: fw_send_request() may complete much earlier
323 * than when the request packet actually hits the wire. On the other hand, 323 * than when the request packet actually hits the wire. On the other hand,
324 * transaction completion and hence execution of @callback may happen even 324 * transaction completion and hence execution of @callback may happen even
325 * before fw_send_request() returns. 325 * before fw_send_request() returns.
326 */ 326 */
327 void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, 327 void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
328 int destination_id, int generation, int speed, 328 int destination_id, int generation, int speed,
329 unsigned long long offset, void *payload, size_t length, 329 unsigned long long offset, void *payload, size_t length,
330 fw_transaction_callback_t callback, void *callback_data) 330 fw_transaction_callback_t callback, void *callback_data)
331 { 331 {
332 unsigned long flags; 332 unsigned long flags;
333 int tlabel; 333 int tlabel;
334 334
335 /* 335 /*
336 * Allocate tlabel from the bitmap and put the transaction on 336 * Allocate tlabel from the bitmap and put the transaction on
337 * the list while holding the card spinlock. 337 * the list while holding the card spinlock.
338 */ 338 */
339 339
340 spin_lock_irqsave(&card->lock, flags); 340 spin_lock_irqsave(&card->lock, flags);
341 341
342 tlabel = allocate_tlabel(card); 342 tlabel = allocate_tlabel(card);
343 if (tlabel < 0) { 343 if (tlabel < 0) {
344 spin_unlock_irqrestore(&card->lock, flags); 344 spin_unlock_irqrestore(&card->lock, flags);
345 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); 345 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
346 return; 346 return;
347 } 347 }
348 348
349 t->node_id = destination_id; 349 t->node_id = destination_id;
350 t->tlabel = tlabel; 350 t->tlabel = tlabel;
351 t->card = card; 351 t->card = card;
352 setup_timer(&t->split_timeout_timer, 352 setup_timer(&t->split_timeout_timer,
353 split_transaction_timeout_callback, (unsigned long)t); 353 split_transaction_timeout_callback, (unsigned long)t);
354 /* FIXME: start this timer later, relative to t->timestamp */ 354 /* FIXME: start this timer later, relative to t->timestamp */
355 mod_timer(&t->split_timeout_timer, 355 mod_timer(&t->split_timeout_timer,
356 jiffies + card->split_timeout_jiffies); 356 jiffies + card->split_timeout_jiffies);
357 t->callback = callback; 357 t->callback = callback;
358 t->callback_data = callback_data; 358 t->callback_data = callback_data;
359 359
360 fw_fill_request(&t->packet, tcode, t->tlabel, 360 fw_fill_request(&t->packet, tcode, t->tlabel,
361 destination_id, card->node_id, generation, 361 destination_id, card->node_id, generation,
362 speed, offset, payload, length); 362 speed, offset, payload, length);
363 t->packet.callback = transmit_complete_callback; 363 t->packet.callback = transmit_complete_callback;
364 364
365 list_add_tail(&t->link, &card->transaction_list); 365 list_add_tail(&t->link, &card->transaction_list);
366 366
367 spin_unlock_irqrestore(&card->lock, flags); 367 spin_unlock_irqrestore(&card->lock, flags);
368 368
369 card->driver->send_request(card, &t->packet); 369 card->driver->send_request(card, &t->packet);
370 } 370 }
371 EXPORT_SYMBOL(fw_send_request); 371 EXPORT_SYMBOL(fw_send_request);
372 372
373 struct transaction_callback_data { 373 struct transaction_callback_data {
374 struct completion done; 374 struct completion done;
375 void *payload; 375 void *payload;
376 int rcode; 376 int rcode;
377 }; 377 };
378 378
379 static void transaction_callback(struct fw_card *card, int rcode, 379 static void transaction_callback(struct fw_card *card, int rcode,
380 void *payload, size_t length, void *data) 380 void *payload, size_t length, void *data)
381 { 381 {
382 struct transaction_callback_data *d = data; 382 struct transaction_callback_data *d = data;
383 383
384 if (rcode == RCODE_COMPLETE) 384 if (rcode == RCODE_COMPLETE)
385 memcpy(d->payload, payload, length); 385 memcpy(d->payload, payload, length);
386 d->rcode = rcode; 386 d->rcode = rcode;
387 complete(&d->done); 387 complete(&d->done);
388 } 388 }
389 389
390 /** 390 /**
391 * fw_run_transaction() - send request and sleep until transaction is completed 391 * fw_run_transaction() - send request and sleep until transaction is completed
392 * 392 *
393 * Returns the RCODE. See fw_send_request() for parameter documentation. 393 * Returns the RCODE. See fw_send_request() for parameter documentation.
394 * Unlike fw_send_request(), @data points to the payload of the request or/and 394 * Unlike fw_send_request(), @data points to the payload of the request or/and
395 * to the payload of the response. 395 * to the payload of the response.
396 */ 396 */
397 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, 397 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
398 int generation, int speed, unsigned long long offset, 398 int generation, int speed, unsigned long long offset,
399 void *payload, size_t length) 399 void *payload, size_t length)
400 { 400 {
401 struct transaction_callback_data d; 401 struct transaction_callback_data d;
402 struct fw_transaction t; 402 struct fw_transaction t;
403 403
404 init_timer_on_stack(&t.split_timeout_timer); 404 init_timer_on_stack(&t.split_timeout_timer);
405 init_completion(&d.done); 405 init_completion(&d.done);
406 d.payload = payload; 406 d.payload = payload;
407 fw_send_request(card, &t, tcode, destination_id, generation, speed, 407 fw_send_request(card, &t, tcode, destination_id, generation, speed,
408 offset, payload, length, transaction_callback, &d); 408 offset, payload, length, transaction_callback, &d);
409 wait_for_completion(&d.done); 409 wait_for_completion(&d.done);
410 destroy_timer_on_stack(&t.split_timeout_timer); 410 destroy_timer_on_stack(&t.split_timeout_timer);
411 411
412 return d.rcode; 412 return d.rcode;
413 } 413 }
414 EXPORT_SYMBOL(fw_run_transaction); 414 EXPORT_SYMBOL(fw_run_transaction);
415 415
416 static DEFINE_MUTEX(phy_config_mutex); 416 static DEFINE_MUTEX(phy_config_mutex);
417 static DECLARE_COMPLETION(phy_config_done); 417 static DECLARE_COMPLETION(phy_config_done);
418 418
419 static void transmit_phy_packet_callback(struct fw_packet *packet, 419 static void transmit_phy_packet_callback(struct fw_packet *packet,
420 struct fw_card *card, int status) 420 struct fw_card *card, int status)
421 { 421 {
422 complete(&phy_config_done); 422 complete(&phy_config_done);
423 } 423 }
424 424
425 static struct fw_packet phy_config_packet = { 425 static struct fw_packet phy_config_packet = {
426 .header_length = 8, 426 .header_length = 8,
427 .payload_length = 0, 427 .payload_length = 0,
428 .speed = SCODE_100, 428 .speed = SCODE_100,
429 .callback = transmit_phy_packet_callback, 429 .callback = transmit_phy_packet_callback,
430 }; 430 };
431 431
432 void fw_send_phy_config(struct fw_card *card, 432 void fw_send_phy_config(struct fw_card *card,
433 int node_id, int generation, int gap_count) 433 int node_id, int generation, int gap_count)
434 { 434 {
435 long timeout = DIV_ROUND_UP(HZ, 10); 435 long timeout = DIV_ROUND_UP(HZ, 10);
436 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); 436 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG);
437 437
438 if (node_id != FW_PHY_CONFIG_NO_NODE_ID) 438 if (node_id != FW_PHY_CONFIG_NO_NODE_ID)
439 data |= PHY_CONFIG_ROOT_ID(node_id); 439 data |= PHY_CONFIG_ROOT_ID(node_id);
440 440
441 if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { 441 if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) {
442 gap_count = card->driver->read_phy_reg(card, 1); 442 gap_count = card->driver->read_phy_reg(card, 1);
443 if (gap_count < 0) 443 if (gap_count < 0)
444 return; 444 return;
445 445
446 gap_count &= 63; 446 gap_count &= 63;
447 if (gap_count == 63) 447 if (gap_count == 63)
448 return; 448 return;
449 } 449 }
450 data |= PHY_CONFIG_GAP_COUNT(gap_count); 450 data |= PHY_CONFIG_GAP_COUNT(gap_count);
451 451
452 mutex_lock(&phy_config_mutex); 452 mutex_lock(&phy_config_mutex);
453 453
454 phy_config_packet.header[0] = data; 454 phy_config_packet.header[0] = data;
455 phy_config_packet.header[1] = ~data; 455 phy_config_packet.header[1] = ~data;
456 phy_config_packet.generation = generation; 456 phy_config_packet.generation = generation;
457 INIT_COMPLETION(phy_config_done); 457 INIT_COMPLETION(phy_config_done);
458 458
459 card->driver->send_request(card, &phy_config_packet); 459 card->driver->send_request(card, &phy_config_packet);
460 wait_for_completion_timeout(&phy_config_done, timeout); 460 wait_for_completion_timeout(&phy_config_done, timeout);
461 461
462 mutex_unlock(&phy_config_mutex); 462 mutex_unlock(&phy_config_mutex);
463 } 463 }
464 464
465 static struct fw_address_handler *lookup_overlapping_address_handler( 465 static struct fw_address_handler *lookup_overlapping_address_handler(
466 struct list_head *list, unsigned long long offset, size_t length) 466 struct list_head *list, unsigned long long offset, size_t length)
467 { 467 {
468 struct fw_address_handler *handler; 468 struct fw_address_handler *handler;
469 469
470 list_for_each_entry(handler, list, link) { 470 list_for_each_entry(handler, list, link) {
471 if (handler->offset < offset + length && 471 if (handler->offset < offset + length &&
472 offset < handler->offset + handler->length) 472 offset < handler->offset + handler->length)
473 return handler; 473 return handler;
474 } 474 }
475 475
476 return NULL; 476 return NULL;
477 } 477 }
478 478
479 static bool is_enclosing_handler(struct fw_address_handler *handler, 479 static bool is_enclosing_handler(struct fw_address_handler *handler,
480 unsigned long long offset, size_t length) 480 unsigned long long offset, size_t length)
481 { 481 {
482 return handler->offset <= offset && 482 return handler->offset <= offset &&
483 offset + length <= handler->offset + handler->length; 483 offset + length <= handler->offset + handler->length;
484 } 484 }
485 485
486 static struct fw_address_handler *lookup_enclosing_address_handler( 486 static struct fw_address_handler *lookup_enclosing_address_handler(
487 struct list_head *list, unsigned long long offset, size_t length) 487 struct list_head *list, unsigned long long offset, size_t length)
488 { 488 {
489 struct fw_address_handler *handler; 489 struct fw_address_handler *handler;
490 490
491 list_for_each_entry(handler, list, link) { 491 list_for_each_entry(handler, list, link) {
492 if (is_enclosing_handler(handler, offset, length)) 492 if (is_enclosing_handler(handler, offset, length))
493 return handler; 493 return handler;
494 } 494 }
495 495
496 return NULL; 496 return NULL;
497 } 497 }
498 498
499 static DEFINE_SPINLOCK(address_handler_lock); 499 static DEFINE_SPINLOCK(address_handler_lock);
500 static LIST_HEAD(address_handler_list); 500 static LIST_HEAD(address_handler_list);
501 501
502 const struct fw_address_region fw_high_memory_region = 502 const struct fw_address_region fw_high_memory_region =
503 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; 503 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
504 EXPORT_SYMBOL(fw_high_memory_region); 504 EXPORT_SYMBOL(fw_high_memory_region);
505 505
506 #if 0 506 #if 0
507 const struct fw_address_region fw_low_memory_region = 507 const struct fw_address_region fw_low_memory_region =
508 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; 508 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
509 const struct fw_address_region fw_private_region = 509 const struct fw_address_region fw_private_region =
510 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; 510 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
511 const struct fw_address_region fw_csr_region = 511 const struct fw_address_region fw_csr_region =
512 { .start = CSR_REGISTER_BASE, 512 { .start = CSR_REGISTER_BASE,
513 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; 513 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
514 const struct fw_address_region fw_unit_space_region = 514 const struct fw_address_region fw_unit_space_region =
515 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; 515 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
516 #endif /* 0 */ 516 #endif /* 0 */
517 517
518 static bool is_in_fcp_region(u64 offset, size_t length) 518 static bool is_in_fcp_region(u64 offset, size_t length)
519 { 519 {
520 return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && 520 return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) &&
521 offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); 521 offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END);
522 } 522 }
523 523
524 /** 524 /**
525 * fw_core_add_address_handler() - register for incoming requests 525 * fw_core_add_address_handler() - register for incoming requests
526 * @handler: callback 526 * @handler: callback
527 * @region: region in the IEEE 1212 node space address range 527 * @region: region in the IEEE 1212 node space address range
528 * 528 *
529 * region->start, ->end, and handler->length have to be quadlet-aligned. 529 * region->start, ->end, and handler->length have to be quadlet-aligned.
530 * 530 *
531 * When a request is received that falls within the specified address range, 531 * When a request is received that falls within the specified address range,
532 * the specified callback is invoked. The parameters passed to the callback 532 * the specified callback is invoked. The parameters passed to the callback
533 * give the details of the particular request. 533 * give the details of the particular request.
534 * 534 *
535 * Return value: 0 on success, non-zero otherwise. 535 * Return value: 0 on success, non-zero otherwise.
536 * 536 *
537 * The start offset of the handler's address region is determined by 537 * The start offset of the handler's address region is determined by
538 * fw_core_add_address_handler() and is returned in handler->offset. 538 * fw_core_add_address_handler() and is returned in handler->offset.
539 * 539 *
540 * Address allocations are exclusive, except for the FCP registers. 540 * Address allocations are exclusive, except for the FCP registers.
541 */ 541 */
542 int fw_core_add_address_handler(struct fw_address_handler *handler, 542 int fw_core_add_address_handler(struct fw_address_handler *handler,
543 const struct fw_address_region *region) 543 const struct fw_address_region *region)
544 { 544 {
545 struct fw_address_handler *other; 545 struct fw_address_handler *other;
546 unsigned long flags; 546 unsigned long flags;
547 int ret = -EBUSY; 547 int ret = -EBUSY;
548 548
549 if (region->start & 0xffff000000000003ULL || 549 if (region->start & 0xffff000000000003ULL ||
550 region->start >= region->end || 550 region->start >= region->end ||
551 region->end > 0x0001000000000000ULL || 551 region->end > 0x0001000000000000ULL ||
552 handler->length & 3 || 552 handler->length & 3 ||
553 handler->length == 0) 553 handler->length == 0)
554 return -EINVAL; 554 return -EINVAL;
555 555
556 spin_lock_irqsave(&address_handler_lock, flags); 556 spin_lock_irqsave(&address_handler_lock, flags);
557 557
558 handler->offset = region->start; 558 handler->offset = region->start;
559 while (handler->offset + handler->length <= region->end) { 559 while (handler->offset + handler->length <= region->end) {
560 if (is_in_fcp_region(handler->offset, handler->length)) 560 if (is_in_fcp_region(handler->offset, handler->length))
561 other = NULL; 561 other = NULL;
562 else 562 else
563 other = lookup_overlapping_address_handler 563 other = lookup_overlapping_address_handler
564 (&address_handler_list, 564 (&address_handler_list,
565 handler->offset, handler->length); 565 handler->offset, handler->length);
566 if (other != NULL) { 566 if (other != NULL) {
567 handler->offset += other->length; 567 handler->offset += other->length;
568 } else { 568 } else {
569 list_add_tail(&handler->link, &address_handler_list); 569 list_add_tail(&handler->link, &address_handler_list);
570 ret = 0; 570 ret = 0;
571 break; 571 break;
572 } 572 }
573 } 573 }
574 574
575 spin_unlock_irqrestore(&address_handler_lock, flags); 575 spin_unlock_irqrestore(&address_handler_lock, flags);
576 576
577 return ret; 577 return ret;
578 } 578 }
579 EXPORT_SYMBOL(fw_core_add_address_handler); 579 EXPORT_SYMBOL(fw_core_add_address_handler);
580 580
581 /** 581 /**
582 * fw_core_remove_address_handler() - unregister an address handler 582 * fw_core_remove_address_handler() - unregister an address handler
583 */ 583 */
584 void fw_core_remove_address_handler(struct fw_address_handler *handler) 584 void fw_core_remove_address_handler(struct fw_address_handler *handler)
585 { 585 {
586 unsigned long flags; 586 unsigned long flags;
587 587
588 spin_lock_irqsave(&address_handler_lock, flags); 588 spin_lock_irqsave(&address_handler_lock, flags);
589 list_del(&handler->link); 589 list_del(&handler->link);
590 spin_unlock_irqrestore(&address_handler_lock, flags); 590 spin_unlock_irqrestore(&address_handler_lock, flags);
591 } 591 }
592 EXPORT_SYMBOL(fw_core_remove_address_handler); 592 EXPORT_SYMBOL(fw_core_remove_address_handler);
593 593
594 struct fw_request { 594 struct fw_request {
595 struct fw_packet response; 595 struct fw_packet response;
596 u32 request_header[4]; 596 u32 request_header[4];
597 int ack; 597 int ack;
598 u32 length; 598 u32 length;
599 u32 data[0]; 599 u32 data[0];
600 }; 600 };
601 601
602 static void free_response_callback(struct fw_packet *packet, 602 static void free_response_callback(struct fw_packet *packet,
603 struct fw_card *card, int status) 603 struct fw_card *card, int status)
604 { 604 {
605 struct fw_request *request; 605 struct fw_request *request;
606 606
607 request = container_of(packet, struct fw_request, response); 607 request = container_of(packet, struct fw_request, response);
608 kfree(request); 608 kfree(request);
609 } 609 }
610 610
611 int fw_get_response_length(struct fw_request *r) 611 int fw_get_response_length(struct fw_request *r)
612 { 612 {
613 int tcode, ext_tcode, data_length; 613 int tcode, ext_tcode, data_length;
614 614
615 tcode = HEADER_GET_TCODE(r->request_header[0]); 615 tcode = HEADER_GET_TCODE(r->request_header[0]);
616 616
617 switch (tcode) { 617 switch (tcode) {
618 case TCODE_WRITE_QUADLET_REQUEST: 618 case TCODE_WRITE_QUADLET_REQUEST:
619 case TCODE_WRITE_BLOCK_REQUEST: 619 case TCODE_WRITE_BLOCK_REQUEST:
620 return 0; 620 return 0;
621 621
622 case TCODE_READ_QUADLET_REQUEST: 622 case TCODE_READ_QUADLET_REQUEST:
623 return 4; 623 return 4;
624 624
625 case TCODE_READ_BLOCK_REQUEST: 625 case TCODE_READ_BLOCK_REQUEST:
626 data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); 626 data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]);
627 return data_length; 627 return data_length;
628 628
629 case TCODE_LOCK_REQUEST: 629 case TCODE_LOCK_REQUEST:
630 ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); 630 ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]);
631 data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); 631 data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]);
632 switch (ext_tcode) { 632 switch (ext_tcode) {
633 case EXTCODE_FETCH_ADD: 633 case EXTCODE_FETCH_ADD:
634 case EXTCODE_LITTLE_ADD: 634 case EXTCODE_LITTLE_ADD:
635 return data_length; 635 return data_length;
636 default: 636 default:
637 return data_length / 2; 637 return data_length / 2;
638 } 638 }
639 639
640 default: 640 default:
641 WARN(1, "wrong tcode %d", tcode); 641 WARN(1, "wrong tcode %d\n", tcode);
642 return 0; 642 return 0;
643 } 643 }
644 } 644 }
645 645
646 void fw_fill_response(struct fw_packet *response, u32 *request_header, 646 void fw_fill_response(struct fw_packet *response, u32 *request_header,
647 int rcode, void *payload, size_t length) 647 int rcode, void *payload, size_t length)
648 { 648 {
649 int tcode, tlabel, extended_tcode, source, destination; 649 int tcode, tlabel, extended_tcode, source, destination;
650 650
651 tcode = HEADER_GET_TCODE(request_header[0]); 651 tcode = HEADER_GET_TCODE(request_header[0]);
652 tlabel = HEADER_GET_TLABEL(request_header[0]); 652 tlabel = HEADER_GET_TLABEL(request_header[0]);
653 source = HEADER_GET_DESTINATION(request_header[0]); 653 source = HEADER_GET_DESTINATION(request_header[0]);
654 destination = HEADER_GET_SOURCE(request_header[1]); 654 destination = HEADER_GET_SOURCE(request_header[1]);
655 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); 655 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
656 656
657 response->header[0] = 657 response->header[0] =
658 HEADER_RETRY(RETRY_1) | 658 HEADER_RETRY(RETRY_1) |
659 HEADER_TLABEL(tlabel) | 659 HEADER_TLABEL(tlabel) |
660 HEADER_DESTINATION(destination); 660 HEADER_DESTINATION(destination);
661 response->header[1] = 661 response->header[1] =
662 HEADER_SOURCE(source) | 662 HEADER_SOURCE(source) |
663 HEADER_RCODE(rcode); 663 HEADER_RCODE(rcode);
664 response->header[2] = 0; 664 response->header[2] = 0;
665 665
666 switch (tcode) { 666 switch (tcode) {
667 case TCODE_WRITE_QUADLET_REQUEST: 667 case TCODE_WRITE_QUADLET_REQUEST:
668 case TCODE_WRITE_BLOCK_REQUEST: 668 case TCODE_WRITE_BLOCK_REQUEST:
669 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); 669 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
670 response->header_length = 12; 670 response->header_length = 12;
671 response->payload_length = 0; 671 response->payload_length = 0;
672 break; 672 break;
673 673
674 case TCODE_READ_QUADLET_REQUEST: 674 case TCODE_READ_QUADLET_REQUEST:
675 response->header[0] |= 675 response->header[0] |=
676 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); 676 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
677 if (payload != NULL) 677 if (payload != NULL)
678 response->header[3] = *(u32 *)payload; 678 response->header[3] = *(u32 *)payload;
679 else 679 else
680 response->header[3] = 0; 680 response->header[3] = 0;
681 response->header_length = 16; 681 response->header_length = 16;
682 response->payload_length = 0; 682 response->payload_length = 0;
683 break; 683 break;
684 684
685 case TCODE_READ_BLOCK_REQUEST: 685 case TCODE_READ_BLOCK_REQUEST:
686 case TCODE_LOCK_REQUEST: 686 case TCODE_LOCK_REQUEST:
687 response->header[0] |= HEADER_TCODE(tcode + 2); 687 response->header[0] |= HEADER_TCODE(tcode + 2);
688 response->header[3] = 688 response->header[3] =
689 HEADER_DATA_LENGTH(length) | 689 HEADER_DATA_LENGTH(length) |
690 HEADER_EXTENDED_TCODE(extended_tcode); 690 HEADER_EXTENDED_TCODE(extended_tcode);
691 response->header_length = 16; 691 response->header_length = 16;
692 response->payload = payload; 692 response->payload = payload;
693 response->payload_length = length; 693 response->payload_length = length;
694 break; 694 break;
695 695
696 default: 696 default:
697 WARN(1, "wrong tcode %d", tcode); 697 WARN(1, "wrong tcode %d\n", tcode);
698 } 698 }
699 699
700 response->payload_mapped = false; 700 response->payload_mapped = false;
701 } 701 }
702 EXPORT_SYMBOL(fw_fill_response); 702 EXPORT_SYMBOL(fw_fill_response);
703 703
704 static u32 compute_split_timeout_timestamp(struct fw_card *card, 704 static u32 compute_split_timeout_timestamp(struct fw_card *card,
705 u32 request_timestamp) 705 u32 request_timestamp)
706 { 706 {
707 unsigned int cycles; 707 unsigned int cycles;
708 u32 timestamp; 708 u32 timestamp;
709 709
710 cycles = card->split_timeout_cycles; 710 cycles = card->split_timeout_cycles;
711 cycles += request_timestamp & 0x1fff; 711 cycles += request_timestamp & 0x1fff;
712 712
713 timestamp = request_timestamp & ~0x1fff; 713 timestamp = request_timestamp & ~0x1fff;
714 timestamp += (cycles / 8000) << 13; 714 timestamp += (cycles / 8000) << 13;
715 timestamp |= cycles % 8000; 715 timestamp |= cycles % 8000;
716 716
717 return timestamp; 717 return timestamp;
718 } 718 }
719 719
720 static struct fw_request *allocate_request(struct fw_card *card, 720 static struct fw_request *allocate_request(struct fw_card *card,
721 struct fw_packet *p) 721 struct fw_packet *p)
722 { 722 {
723 struct fw_request *request; 723 struct fw_request *request;
724 u32 *data, length; 724 u32 *data, length;
725 int request_tcode; 725 int request_tcode;
726 726
727 request_tcode = HEADER_GET_TCODE(p->header[0]); 727 request_tcode = HEADER_GET_TCODE(p->header[0]);
728 switch (request_tcode) { 728 switch (request_tcode) {
729 case TCODE_WRITE_QUADLET_REQUEST: 729 case TCODE_WRITE_QUADLET_REQUEST:
730 data = &p->header[3]; 730 data = &p->header[3];
731 length = 4; 731 length = 4;
732 break; 732 break;
733 733
734 case TCODE_WRITE_BLOCK_REQUEST: 734 case TCODE_WRITE_BLOCK_REQUEST:
735 case TCODE_LOCK_REQUEST: 735 case TCODE_LOCK_REQUEST:
736 data = p->payload; 736 data = p->payload;
737 length = HEADER_GET_DATA_LENGTH(p->header[3]); 737 length = HEADER_GET_DATA_LENGTH(p->header[3]);
738 break; 738 break;
739 739
740 case TCODE_READ_QUADLET_REQUEST: 740 case TCODE_READ_QUADLET_REQUEST:
741 data = NULL; 741 data = NULL;
742 length = 4; 742 length = 4;
743 break; 743 break;
744 744
745 case TCODE_READ_BLOCK_REQUEST: 745 case TCODE_READ_BLOCK_REQUEST:
746 data = NULL; 746 data = NULL;
747 length = HEADER_GET_DATA_LENGTH(p->header[3]); 747 length = HEADER_GET_DATA_LENGTH(p->header[3]);
748 break; 748 break;
749 749
750 default: 750 default:
751 fw_error("ERROR - corrupt request received - %08x %08x %08x\n", 751 fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
752 p->header[0], p->header[1], p->header[2]); 752 p->header[0], p->header[1], p->header[2]);
753 return NULL; 753 return NULL;
754 } 754 }
755 755
756 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); 756 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
757 if (request == NULL) 757 if (request == NULL)
758 return NULL; 758 return NULL;
759 759
760 request->response.speed = p->speed; 760 request->response.speed = p->speed;
761 request->response.timestamp = 761 request->response.timestamp =
762 compute_split_timeout_timestamp(card, p->timestamp); 762 compute_split_timeout_timestamp(card, p->timestamp);
763 request->response.generation = p->generation; 763 request->response.generation = p->generation;
764 request->response.ack = 0; 764 request->response.ack = 0;
765 request->response.callback = free_response_callback; 765 request->response.callback = free_response_callback;
766 request->ack = p->ack; 766 request->ack = p->ack;
767 request->length = length; 767 request->length = length;
768 if (data) 768 if (data)
769 memcpy(request->data, data, length); 769 memcpy(request->data, data, length);
770 770
771 memcpy(request->request_header, p->header, sizeof(p->header)); 771 memcpy(request->request_header, p->header, sizeof(p->header));
772 772
773 return request; 773 return request;
774 } 774 }
775 775
776 void fw_send_response(struct fw_card *card, 776 void fw_send_response(struct fw_card *card,
777 struct fw_request *request, int rcode) 777 struct fw_request *request, int rcode)
778 { 778 {
779 if (WARN_ONCE(!request, "invalid for FCP address handlers")) 779 if (WARN_ONCE(!request, "invalid for FCP address handlers"))
780 return; 780 return;
781 781
782 /* unified transaction or broadcast transaction: don't respond */ 782 /* unified transaction or broadcast transaction: don't respond */
783 if (request->ack != ACK_PENDING || 783 if (request->ack != ACK_PENDING ||
784 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { 784 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
785 kfree(request); 785 kfree(request);
786 return; 786 return;
787 } 787 }
788 788
789 if (rcode == RCODE_COMPLETE) 789 if (rcode == RCODE_COMPLETE)
790 fw_fill_response(&request->response, request->request_header, 790 fw_fill_response(&request->response, request->request_header,
791 rcode, request->data, 791 rcode, request->data,
792 fw_get_response_length(request)); 792 fw_get_response_length(request));
793 else 793 else
794 fw_fill_response(&request->response, request->request_header, 794 fw_fill_response(&request->response, request->request_header,
795 rcode, NULL, 0); 795 rcode, NULL, 0);
796 796
797 card->driver->send_response(card, &request->response); 797 card->driver->send_response(card, &request->response);
798 } 798 }
799 EXPORT_SYMBOL(fw_send_response); 799 EXPORT_SYMBOL(fw_send_response);
800 800
801 static void handle_exclusive_region_request(struct fw_card *card, 801 static void handle_exclusive_region_request(struct fw_card *card,
802 struct fw_packet *p, 802 struct fw_packet *p,
803 struct fw_request *request, 803 struct fw_request *request,
804 unsigned long long offset) 804 unsigned long long offset)
805 { 805 {
806 struct fw_address_handler *handler; 806 struct fw_address_handler *handler;
807 unsigned long flags; 807 unsigned long flags;
808 int tcode, destination, source; 808 int tcode, destination, source;
809 809
810 destination = HEADER_GET_DESTINATION(p->header[0]); 810 destination = HEADER_GET_DESTINATION(p->header[0]);
811 source = HEADER_GET_SOURCE(p->header[1]); 811 source = HEADER_GET_SOURCE(p->header[1]);
812 tcode = HEADER_GET_TCODE(p->header[0]); 812 tcode = HEADER_GET_TCODE(p->header[0]);
813 if (tcode == TCODE_LOCK_REQUEST) 813 if (tcode == TCODE_LOCK_REQUEST)
814 tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]); 814 tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]);
815 815
816 spin_lock_irqsave(&address_handler_lock, flags); 816 spin_lock_irqsave(&address_handler_lock, flags);
817 handler = lookup_enclosing_address_handler(&address_handler_list, 817 handler = lookup_enclosing_address_handler(&address_handler_list,
818 offset, request->length); 818 offset, request->length);
819 spin_unlock_irqrestore(&address_handler_lock, flags); 819 spin_unlock_irqrestore(&address_handler_lock, flags);
820 820
821 /* 821 /*
822 * FIXME: lookup the fw_node corresponding to the sender of 822 * FIXME: lookup the fw_node corresponding to the sender of
823 * this request and pass that to the address handler instead 823 * this request and pass that to the address handler instead
824 * of the node ID. We may also want to move the address 824 * of the node ID. We may also want to move the address
825 * allocations to fw_node so we only do this callback if the 825 * allocations to fw_node so we only do this callback if the
826 * upper layers registered it for this node. 826 * upper layers registered it for this node.
827 */ 827 */
828 828
829 if (handler == NULL) 829 if (handler == NULL)
830 fw_send_response(card, request, RCODE_ADDRESS_ERROR); 830 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
831 else 831 else
832 handler->address_callback(card, request, 832 handler->address_callback(card, request,
833 tcode, destination, source, 833 tcode, destination, source,
834 p->generation, offset, 834 p->generation, offset,
835 request->data, request->length, 835 request->data, request->length,
836 handler->callback_data); 836 handler->callback_data);
837 } 837 }
838 838
839 static void handle_fcp_region_request(struct fw_card *card, 839 static void handle_fcp_region_request(struct fw_card *card,
840 struct fw_packet *p, 840 struct fw_packet *p,
841 struct fw_request *request, 841 struct fw_request *request,
842 unsigned long long offset) 842 unsigned long long offset)
843 { 843 {
844 struct fw_address_handler *handler; 844 struct fw_address_handler *handler;
845 unsigned long flags; 845 unsigned long flags;
846 int tcode, destination, source; 846 int tcode, destination, source;
847 847
848 if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && 848 if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) &&
849 offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || 849 offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) ||
850 request->length > 0x200) { 850 request->length > 0x200) {
851 fw_send_response(card, request, RCODE_ADDRESS_ERROR); 851 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
852 852
853 return; 853 return;
854 } 854 }
855 855
856 tcode = HEADER_GET_TCODE(p->header[0]); 856 tcode = HEADER_GET_TCODE(p->header[0]);
857 destination = HEADER_GET_DESTINATION(p->header[0]); 857 destination = HEADER_GET_DESTINATION(p->header[0]);
858 source = HEADER_GET_SOURCE(p->header[1]); 858 source = HEADER_GET_SOURCE(p->header[1]);
859 859
860 if (tcode != TCODE_WRITE_QUADLET_REQUEST && 860 if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
861 tcode != TCODE_WRITE_BLOCK_REQUEST) { 861 tcode != TCODE_WRITE_BLOCK_REQUEST) {
862 fw_send_response(card, request, RCODE_TYPE_ERROR); 862 fw_send_response(card, request, RCODE_TYPE_ERROR);
863 863
864 return; 864 return;
865 } 865 }
866 866
867 spin_lock_irqsave(&address_handler_lock, flags); 867 spin_lock_irqsave(&address_handler_lock, flags);
868 list_for_each_entry(handler, &address_handler_list, link) { 868 list_for_each_entry(handler, &address_handler_list, link) {
869 if (is_enclosing_handler(handler, offset, request->length)) 869 if (is_enclosing_handler(handler, offset, request->length))
870 handler->address_callback(card, NULL, tcode, 870 handler->address_callback(card, NULL, tcode,
871 destination, source, 871 destination, source,
872 p->generation, offset, 872 p->generation, offset,
873 request->data, 873 request->data,
874 request->length, 874 request->length,
875 handler->callback_data); 875 handler->callback_data);
876 } 876 }
877 spin_unlock_irqrestore(&address_handler_lock, flags); 877 spin_unlock_irqrestore(&address_handler_lock, flags);
878 878
879 fw_send_response(card, request, RCODE_COMPLETE); 879 fw_send_response(card, request, RCODE_COMPLETE);
880 } 880 }
881 881
882 void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) 882 void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
883 { 883 {
884 struct fw_request *request; 884 struct fw_request *request;
885 unsigned long long offset; 885 unsigned long long offset;
886 886
887 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) 887 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
888 return; 888 return;
889 889
890 if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) { 890 if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) {
891 fw_cdev_handle_phy_packet(card, p); 891 fw_cdev_handle_phy_packet(card, p);
892 return; 892 return;
893 } 893 }
894 894
895 request = allocate_request(card, p); 895 request = allocate_request(card, p);
896 if (request == NULL) { 896 if (request == NULL) {
897 /* FIXME: send statically allocated busy packet. */ 897 /* FIXME: send statically allocated busy packet. */
898 return; 898 return;
899 } 899 }
900 900
901 offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | 901 offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) |
902 p->header[2]; 902 p->header[2];
903 903
904 if (!is_in_fcp_region(offset, request->length)) 904 if (!is_in_fcp_region(offset, request->length))
905 handle_exclusive_region_request(card, p, request, offset); 905 handle_exclusive_region_request(card, p, request, offset);
906 else 906 else
907 handle_fcp_region_request(card, p, request, offset); 907 handle_fcp_region_request(card, p, request, offset);
908 908
909 } 909 }
910 EXPORT_SYMBOL(fw_core_handle_request); 910 EXPORT_SYMBOL(fw_core_handle_request);
911 911
912 void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) 912 void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
913 { 913 {
914 struct fw_transaction *t; 914 struct fw_transaction *t;
915 unsigned long flags; 915 unsigned long flags;
916 u32 *data; 916 u32 *data;
917 size_t data_length; 917 size_t data_length;
918 int tcode, tlabel, source, rcode; 918 int tcode, tlabel, source, rcode;
919 919
920 tcode = HEADER_GET_TCODE(p->header[0]); 920 tcode = HEADER_GET_TCODE(p->header[0]);
921 tlabel = HEADER_GET_TLABEL(p->header[0]); 921 tlabel = HEADER_GET_TLABEL(p->header[0]);
922 source = HEADER_GET_SOURCE(p->header[1]); 922 source = HEADER_GET_SOURCE(p->header[1]);
923 rcode = HEADER_GET_RCODE(p->header[1]); 923 rcode = HEADER_GET_RCODE(p->header[1]);
924 924
925 spin_lock_irqsave(&card->lock, flags); 925 spin_lock_irqsave(&card->lock, flags);
926 list_for_each_entry(t, &card->transaction_list, link) { 926 list_for_each_entry(t, &card->transaction_list, link) {
927 if (t->node_id == source && t->tlabel == tlabel) { 927 if (t->node_id == source && t->tlabel == tlabel) {
928 if (!del_timer(&t->split_timeout_timer)) { 928 if (!del_timer(&t->split_timeout_timer)) {
929 spin_unlock_irqrestore(&card->lock, flags); 929 spin_unlock_irqrestore(&card->lock, flags);
930 goto timed_out; 930 goto timed_out;
931 } 931 }
932 list_del_init(&t->link); 932 list_del_init(&t->link);
933 card->tlabel_mask &= ~(1ULL << t->tlabel); 933 card->tlabel_mask &= ~(1ULL << t->tlabel);
934 break; 934 break;
935 } 935 }
936 } 936 }
937 spin_unlock_irqrestore(&card->lock, flags); 937 spin_unlock_irqrestore(&card->lock, flags);
938 938
939 if (&t->link == &card->transaction_list) { 939 if (&t->link == &card->transaction_list) {
940 timed_out: 940 timed_out:
941 fw_notify("Unsolicited response (source %x, tlabel %x)\n", 941 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
942 source, tlabel); 942 source, tlabel);
943 return; 943 return;
944 } 944 }
945 945
946 /* 946 /*
947 * FIXME: sanity check packet, is length correct, does tcodes 947 * FIXME: sanity check packet, is length correct, does tcodes
948 * and addresses match. 948 * and addresses match.
949 */ 949 */
950 950
951 switch (tcode) { 951 switch (tcode) {
952 case TCODE_READ_QUADLET_RESPONSE: 952 case TCODE_READ_QUADLET_RESPONSE:
953 data = (u32 *) &p->header[3]; 953 data = (u32 *) &p->header[3];
954 data_length = 4; 954 data_length = 4;
955 break; 955 break;
956 956
957 case TCODE_WRITE_RESPONSE: 957 case TCODE_WRITE_RESPONSE:
958 data = NULL; 958 data = NULL;
959 data_length = 0; 959 data_length = 0;
960 break; 960 break;
961 961
962 case TCODE_READ_BLOCK_RESPONSE: 962 case TCODE_READ_BLOCK_RESPONSE:
963 case TCODE_LOCK_RESPONSE: 963 case TCODE_LOCK_RESPONSE:
964 data = p->payload; 964 data = p->payload;
965 data_length = HEADER_GET_DATA_LENGTH(p->header[3]); 965 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
966 break; 966 break;
967 967
968 default: 968 default:
969 /* Should never happen, this is just to shut up gcc. */ 969 /* Should never happen, this is just to shut up gcc. */
970 data = NULL; 970 data = NULL;
971 data_length = 0; 971 data_length = 0;
972 break; 972 break;
973 } 973 }
974 974
975 /* 975 /*
976 * The response handler may be executed while the request handler 976 * The response handler may be executed while the request handler
977 * is still pending. Cancel the request handler. 977 * is still pending. Cancel the request handler.
978 */ 978 */
979 card->driver->cancel_packet(card, &t->packet); 979 card->driver->cancel_packet(card, &t->packet);
980 980
981 t->callback(card, rcode, data, data_length, t->callback_data); 981 t->callback(card, rcode, data, data_length, t->callback_data);
982 } 982 }
983 EXPORT_SYMBOL(fw_core_handle_response); 983 EXPORT_SYMBOL(fw_core_handle_response);
984 984
985 static const struct fw_address_region topology_map_region = 985 static const struct fw_address_region topology_map_region =
986 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, 986 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
987 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; 987 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
988 988
989 static void handle_topology_map(struct fw_card *card, struct fw_request *request, 989 static void handle_topology_map(struct fw_card *card, struct fw_request *request,
990 int tcode, int destination, int source, int generation, 990 int tcode, int destination, int source, int generation,
991 unsigned long long offset, void *payload, size_t length, 991 unsigned long long offset, void *payload, size_t length,
992 void *callback_data) 992 void *callback_data)
993 { 993 {
994 int start; 994 int start;
995 995
996 if (!TCODE_IS_READ_REQUEST(tcode)) { 996 if (!TCODE_IS_READ_REQUEST(tcode)) {
997 fw_send_response(card, request, RCODE_TYPE_ERROR); 997 fw_send_response(card, request, RCODE_TYPE_ERROR);
998 return; 998 return;
999 } 999 }
1000 1000
1001 if ((offset & 3) > 0 || (length & 3) > 0) { 1001 if ((offset & 3) > 0 || (length & 3) > 0) {
1002 fw_send_response(card, request, RCODE_ADDRESS_ERROR); 1002 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
1003 return; 1003 return;
1004 } 1004 }
1005 1005
1006 start = (offset - topology_map_region.start) / 4; 1006 start = (offset - topology_map_region.start) / 4;
1007 memcpy(payload, &card->topology_map[start], length); 1007 memcpy(payload, &card->topology_map[start], length);
1008 1008
1009 fw_send_response(card, request, RCODE_COMPLETE); 1009 fw_send_response(card, request, RCODE_COMPLETE);
1010 } 1010 }
1011 1011
1012 static struct fw_address_handler topology_map = { 1012 static struct fw_address_handler topology_map = {
1013 .length = 0x400, 1013 .length = 0x400,
1014 .address_callback = handle_topology_map, 1014 .address_callback = handle_topology_map,
1015 }; 1015 };
1016 1016
1017 static const struct fw_address_region registers_region = 1017 static const struct fw_address_region registers_region =
1018 { .start = CSR_REGISTER_BASE, 1018 { .start = CSR_REGISTER_BASE,
1019 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; 1019 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
1020 1020
1021 static void update_split_timeout(struct fw_card *card) 1021 static void update_split_timeout(struct fw_card *card)
1022 { 1022 {
1023 unsigned int cycles; 1023 unsigned int cycles;
1024 1024
1025 cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19); 1025 cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19);
1026 1026
1027 cycles = max(cycles, 800u); /* minimum as per the spec */ 1027 cycles = max(cycles, 800u); /* minimum as per the spec */
1028 cycles = min(cycles, 3u * 8000u); /* maximum OHCI timeout */ 1028 cycles = min(cycles, 3u * 8000u); /* maximum OHCI timeout */
1029 1029
1030 card->split_timeout_cycles = cycles; 1030 card->split_timeout_cycles = cycles;
1031 card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000); 1031 card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000);
1032 } 1032 }
1033 1033
1034 static void handle_registers(struct fw_card *card, struct fw_request *request, 1034 static void handle_registers(struct fw_card *card, struct fw_request *request,
1035 int tcode, int destination, int source, int generation, 1035 int tcode, int destination, int source, int generation,
1036 unsigned long long offset, void *payload, size_t length, 1036 unsigned long long offset, void *payload, size_t length,
1037 void *callback_data) 1037 void *callback_data)
1038 { 1038 {
1039 int reg = offset & ~CSR_REGISTER_BASE; 1039 int reg = offset & ~CSR_REGISTER_BASE;
1040 __be32 *data = payload; 1040 __be32 *data = payload;
1041 int rcode = RCODE_COMPLETE; 1041 int rcode = RCODE_COMPLETE;
1042 unsigned long flags; 1042 unsigned long flags;
1043 1043
1044 switch (reg) { 1044 switch (reg) {
1045 case CSR_PRIORITY_BUDGET: 1045 case CSR_PRIORITY_BUDGET:
1046 if (!card->priority_budget_implemented) { 1046 if (!card->priority_budget_implemented) {
1047 rcode = RCODE_ADDRESS_ERROR; 1047 rcode = RCODE_ADDRESS_ERROR;
1048 break; 1048 break;
1049 } 1049 }
1050 /* else fall through */ 1050 /* else fall through */
1051 1051
1052 case CSR_NODE_IDS: 1052 case CSR_NODE_IDS:
1053 /* 1053 /*
1054 * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8 1054 * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8
1055 * and 9.6, but interoperable with IEEE 1394.1-2004 bridges 1055 * and 9.6, but interoperable with IEEE 1394.1-2004 bridges
1056 */ 1056 */
1057 /* fall through */ 1057 /* fall through */
1058 1058
1059 case CSR_STATE_CLEAR: 1059 case CSR_STATE_CLEAR:
1060 case CSR_STATE_SET: 1060 case CSR_STATE_SET:
1061 case CSR_CYCLE_TIME: 1061 case CSR_CYCLE_TIME:
1062 case CSR_BUS_TIME: 1062 case CSR_BUS_TIME:
1063 case CSR_BUSY_TIMEOUT: 1063 case CSR_BUSY_TIMEOUT:
1064 if (tcode == TCODE_READ_QUADLET_REQUEST) 1064 if (tcode == TCODE_READ_QUADLET_REQUEST)
1065 *data = cpu_to_be32(card->driver->read_csr(card, reg)); 1065 *data = cpu_to_be32(card->driver->read_csr(card, reg));
1066 else if (tcode == TCODE_WRITE_QUADLET_REQUEST) 1066 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
1067 card->driver->write_csr(card, reg, be32_to_cpu(*data)); 1067 card->driver->write_csr(card, reg, be32_to_cpu(*data));
1068 else 1068 else
1069 rcode = RCODE_TYPE_ERROR; 1069 rcode = RCODE_TYPE_ERROR;
1070 break; 1070 break;
1071 1071
1072 case CSR_RESET_START: 1072 case CSR_RESET_START:
1073 if (tcode == TCODE_WRITE_QUADLET_REQUEST) 1073 if (tcode == TCODE_WRITE_QUADLET_REQUEST)
1074 card->driver->write_csr(card, CSR_STATE_CLEAR, 1074 card->driver->write_csr(card, CSR_STATE_CLEAR,
1075 CSR_STATE_BIT_ABDICATE); 1075 CSR_STATE_BIT_ABDICATE);
1076 else 1076 else
1077 rcode = RCODE_TYPE_ERROR; 1077 rcode = RCODE_TYPE_ERROR;
1078 break; 1078 break;
1079 1079
1080 case CSR_SPLIT_TIMEOUT_HI: 1080 case CSR_SPLIT_TIMEOUT_HI:
1081 if (tcode == TCODE_READ_QUADLET_REQUEST) { 1081 if (tcode == TCODE_READ_QUADLET_REQUEST) {
1082 *data = cpu_to_be32(card->split_timeout_hi); 1082 *data = cpu_to_be32(card->split_timeout_hi);
1083 } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { 1083 } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) {
1084 spin_lock_irqsave(&card->lock, flags); 1084 spin_lock_irqsave(&card->lock, flags);
1085 card->split_timeout_hi = be32_to_cpu(*data) & 7; 1085 card->split_timeout_hi = be32_to_cpu(*data) & 7;
1086 update_split_timeout(card); 1086 update_split_timeout(card);
1087 spin_unlock_irqrestore(&card->lock, flags); 1087 spin_unlock_irqrestore(&card->lock, flags);
1088 } else { 1088 } else {
1089 rcode = RCODE_TYPE_ERROR; 1089 rcode = RCODE_TYPE_ERROR;
1090 } 1090 }
1091 break; 1091 break;
1092 1092
1093 case CSR_SPLIT_TIMEOUT_LO: 1093 case CSR_SPLIT_TIMEOUT_LO:
1094 if (tcode == TCODE_READ_QUADLET_REQUEST) { 1094 if (tcode == TCODE_READ_QUADLET_REQUEST) {
1095 *data = cpu_to_be32(card->split_timeout_lo); 1095 *data = cpu_to_be32(card->split_timeout_lo);
1096 } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { 1096 } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) {
1097 spin_lock_irqsave(&card->lock, flags); 1097 spin_lock_irqsave(&card->lock, flags);
1098 card->split_timeout_lo = 1098 card->split_timeout_lo =
1099 be32_to_cpu(*data) & 0xfff80000; 1099 be32_to_cpu(*data) & 0xfff80000;
1100 update_split_timeout(card); 1100 update_split_timeout(card);
1101 spin_unlock_irqrestore(&card->lock, flags); 1101 spin_unlock_irqrestore(&card->lock, flags);
1102 } else { 1102 } else {
1103 rcode = RCODE_TYPE_ERROR; 1103 rcode = RCODE_TYPE_ERROR;
1104 } 1104 }
1105 break; 1105 break;
1106 1106
1107 case CSR_MAINT_UTILITY: 1107 case CSR_MAINT_UTILITY:
1108 if (tcode == TCODE_READ_QUADLET_REQUEST) 1108 if (tcode == TCODE_READ_QUADLET_REQUEST)
1109 *data = card->maint_utility_register; 1109 *data = card->maint_utility_register;
1110 else if (tcode == TCODE_WRITE_QUADLET_REQUEST) 1110 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
1111 card->maint_utility_register = *data; 1111 card->maint_utility_register = *data;
1112 else 1112 else
1113 rcode = RCODE_TYPE_ERROR; 1113 rcode = RCODE_TYPE_ERROR;
1114 break; 1114 break;
1115 1115
1116 case CSR_BROADCAST_CHANNEL: 1116 case CSR_BROADCAST_CHANNEL:
1117 if (tcode == TCODE_READ_QUADLET_REQUEST) 1117 if (tcode == TCODE_READ_QUADLET_REQUEST)
1118 *data = cpu_to_be32(card->broadcast_channel); 1118 *data = cpu_to_be32(card->broadcast_channel);
1119 else if (tcode == TCODE_WRITE_QUADLET_REQUEST) 1119 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
1120 card->broadcast_channel = 1120 card->broadcast_channel =
1121 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | 1121 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
1122 BROADCAST_CHANNEL_INITIAL; 1122 BROADCAST_CHANNEL_INITIAL;
1123 else 1123 else
1124 rcode = RCODE_TYPE_ERROR; 1124 rcode = RCODE_TYPE_ERROR;
1125 break; 1125 break;
1126 1126
1127 case CSR_BUS_MANAGER_ID: 1127 case CSR_BUS_MANAGER_ID:
1128 case CSR_BANDWIDTH_AVAILABLE: 1128 case CSR_BANDWIDTH_AVAILABLE:
1129 case CSR_CHANNELS_AVAILABLE_HI: 1129 case CSR_CHANNELS_AVAILABLE_HI:
1130 case CSR_CHANNELS_AVAILABLE_LO: 1130 case CSR_CHANNELS_AVAILABLE_LO:
1131 /* 1131 /*
1132 * FIXME: these are handled by the OHCI hardware and 1132 * FIXME: these are handled by the OHCI hardware and
1133 * the stack never sees these request. If we add 1133 * the stack never sees these request. If we add
1134 * support for a new type of controller that doesn't 1134 * support for a new type of controller that doesn't
1135 * handle this in hardware we need to deal with these 1135 * handle this in hardware we need to deal with these
1136 * transactions. 1136 * transactions.
1137 */ 1137 */
1138 BUG(); 1138 BUG();
1139 break; 1139 break;
1140 1140
1141 default: 1141 default:
1142 rcode = RCODE_ADDRESS_ERROR; 1142 rcode = RCODE_ADDRESS_ERROR;
1143 break; 1143 break;
1144 } 1144 }
1145 1145
1146 fw_send_response(card, request, rcode); 1146 fw_send_response(card, request, rcode);
1147 } 1147 }
1148 1148
1149 static struct fw_address_handler registers = { 1149 static struct fw_address_handler registers = {
1150 .length = 0x400, 1150 .length = 0x400,
1151 .address_callback = handle_registers, 1151 .address_callback = handle_registers,
1152 }; 1152 };
1153 1153
1154 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); 1154 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1155 MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); 1155 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
1156 MODULE_LICENSE("GPL"); 1156 MODULE_LICENSE("GPL");
1157 1157
1158 static const u32 vendor_textual_descriptor[] = { 1158 static const u32 vendor_textual_descriptor[] = {
1159 /* textual descriptor leaf () */ 1159 /* textual descriptor leaf () */
1160 0x00060000, 1160 0x00060000,
1161 0x00000000, 1161 0x00000000,
1162 0x00000000, 1162 0x00000000,
1163 0x4c696e75, /* L i n u */ 1163 0x4c696e75, /* L i n u */
1164 0x78204669, /* x F i */ 1164 0x78204669, /* x F i */
1165 0x72657769, /* r e w i */ 1165 0x72657769, /* r e w i */
1166 0x72650000, /* r e */ 1166 0x72650000, /* r e */
1167 }; 1167 };
1168 1168
1169 static const u32 model_textual_descriptor[] = { 1169 static const u32 model_textual_descriptor[] = {
1170 /* model descriptor leaf () */ 1170 /* model descriptor leaf () */
1171 0x00030000, 1171 0x00030000,
1172 0x00000000, 1172 0x00000000,
1173 0x00000000, 1173 0x00000000,
1174 0x4a756a75, /* J u j u */ 1174 0x4a756a75, /* J u j u */
1175 }; 1175 };
1176 1176
1177 static struct fw_descriptor vendor_id_descriptor = { 1177 static struct fw_descriptor vendor_id_descriptor = {
1178 .length = ARRAY_SIZE(vendor_textual_descriptor), 1178 .length = ARRAY_SIZE(vendor_textual_descriptor),
1179 .immediate = 0x03d00d1e, 1179 .immediate = 0x03d00d1e,
1180 .key = 0x81000000, 1180 .key = 0x81000000,
1181 .data = vendor_textual_descriptor, 1181 .data = vendor_textual_descriptor,
1182 }; 1182 };
1183 1183
1184 static struct fw_descriptor model_id_descriptor = { 1184 static struct fw_descriptor model_id_descriptor = {
1185 .length = ARRAY_SIZE(model_textual_descriptor), 1185 .length = ARRAY_SIZE(model_textual_descriptor),
1186 .immediate = 0x17000001, 1186 .immediate = 0x17000001,
1187 .key = 0x81000000, 1187 .key = 0x81000000,
1188 .data = model_textual_descriptor, 1188 .data = model_textual_descriptor,
1189 }; 1189 };
1190 1190
1191 static int __init fw_core_init(void) 1191 static int __init fw_core_init(void)
1192 { 1192 {
1193 int ret; 1193 int ret;
1194 1194
1195 ret = bus_register(&fw_bus_type); 1195 ret = bus_register(&fw_bus_type);
1196 if (ret < 0) 1196 if (ret < 0)
1197 return ret; 1197 return ret;
1198 1198
1199 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); 1199 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
1200 if (fw_cdev_major < 0) { 1200 if (fw_cdev_major < 0) {
1201 bus_unregister(&fw_bus_type); 1201 bus_unregister(&fw_bus_type);
1202 return fw_cdev_major; 1202 return fw_cdev_major;
1203 } 1203 }
1204 1204
1205 fw_core_add_address_handler(&topology_map, &topology_map_region); 1205 fw_core_add_address_handler(&topology_map, &topology_map_region);
1206 fw_core_add_address_handler(&registers, &registers_region); 1206 fw_core_add_address_handler(&registers, &registers_region);
1207 fw_core_add_descriptor(&vendor_id_descriptor); 1207 fw_core_add_descriptor(&vendor_id_descriptor);
1208 fw_core_add_descriptor(&model_id_descriptor); 1208 fw_core_add_descriptor(&model_id_descriptor);
1209 1209
1210 return 0; 1210 return 0;
1211 } 1211 }
1212 1212
1213 static void __exit fw_core_cleanup(void) 1213 static void __exit fw_core_cleanup(void)
1214 { 1214 {
1215 unregister_chrdev(fw_cdev_major, "firewire"); 1215 unregister_chrdev(fw_cdev_major, "firewire");
1216 bus_unregister(&fw_bus_type); 1216 bus_unregister(&fw_bus_type);
1217 idr_destroy(&fw_device_idr); 1217 idr_destroy(&fw_device_idr);
1218 } 1218 }
1219 1219
1220 module_init(fw_core_init); 1220 module_init(fw_core_init);
1221 module_exit(fw_core_cleanup); 1221 module_exit(fw_core_cleanup);
1222 1222