blob: 8b8c8c22f0fce384229eab085210a1aea4353cc8 [file] [log] [blame]
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
Kristian Høgsberg3038e352006-12-19 19:58:27 -05003 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
Stefan Richter459f7922008-05-24 16:50:22 +020019#include <linux/completion.h>
20#include <linux/crc-itu-t.h>
Stefan Richter855c6032008-02-27 22:14:27 +010021#include <linux/delay.h>
Kristian Høgsberg3038e352006-12-19 19:58:27 -050022#include <linux/device.h>
Stefan Richter459f7922008-05-24 16:50:22 +020023#include <linux/errno.h>
24#include <linux/kref.h>
25#include <linux/module.h>
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -040026#include <linux/mutex.h>
Stefan Richter459f7922008-05-24 16:50:22 +020027
Kristian Høgsberg3038e352006-12-19 19:58:27 -050028#include "fw-transaction.h"
29#include "fw-topology.h"
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050030#include "fw-device.h"
Kristian Høgsberg3038e352006-12-19 19:58:27 -050031
Kristian Høgsberge1755692007-05-07 20:33:31 -040032int fw_compute_block_crc(u32 *block)
Kristian Høgsberg3038e352006-12-19 19:58:27 -050033{
Kristian Høgsberge1755692007-05-07 20:33:31 -040034 __be32 be32_block[256];
35 int i, length;
Kristian Høgsberg3038e352006-12-19 19:58:27 -050036
Kristian Høgsberge1755692007-05-07 20:33:31 -040037 length = (*block >> 16) & 0xff;
38 for (i = 0; i < length; i++)
39 be32_block[i] = cpu_to_be32(block[i + 1]);
40 *block |= crc_itu_t(0, (u8 *) be32_block, length * 4);
Kristian Høgsberg3038e352006-12-19 19:58:27 -050041
Kristian Høgsberge1755692007-05-07 20:33:31 -040042 return length;
Kristian Høgsberg3038e352006-12-19 19:58:27 -050043}
44
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -040045static DEFINE_MUTEX(card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -050046static LIST_HEAD(card_list);
47
48static LIST_HEAD(descriptor_list);
49static int descriptor_count;
50
Kristian Høgsberga77754a2007-05-07 20:33:35 -040051#define BIB_CRC(v) ((v) << 0)
52#define BIB_CRC_LENGTH(v) ((v) << 16)
53#define BIB_INFO_LENGTH(v) ((v) << 24)
Kristian Høgsberg3038e352006-12-19 19:58:27 -050054
Kristian Høgsberga77754a2007-05-07 20:33:35 -040055#define BIB_LINK_SPEED(v) ((v) << 0)
56#define BIB_GENERATION(v) ((v) << 4)
57#define BIB_MAX_ROM(v) ((v) << 8)
58#define BIB_MAX_RECEIVE(v) ((v) << 12)
59#define BIB_CYC_CLK_ACC(v) ((v) << 16)
60#define BIB_PMC ((1) << 27)
61#define BIB_BMC ((1) << 28)
62#define BIB_ISC ((1) << 29)
63#define BIB_CMC ((1) << 30)
64#define BIB_IMC ((1) << 31)
Kristian Høgsberg3038e352006-12-19 19:58:27 -050065
Stefan Richter53dca512008-12-14 21:47:04 +010066static u32 *generate_config_rom(struct fw_card *card, size_t *config_rom_length)
Kristian Høgsberg3038e352006-12-19 19:58:27 -050067{
68 struct fw_descriptor *desc;
69 static u32 config_rom[256];
70 int i, j, length;
71
Kristian Høgsbergc781c062007-05-07 20:33:32 -040072 /*
73 * Initialize contents of config rom buffer. On the OHCI
Stefan Richter5e20c282007-01-21 20:44:09 +010074 * controller, block reads to the config rom accesses the host
75 * memory, but quadlet read access the hardware bus info block
76 * registers. That's just crack, but it means we should make
Jay Fenlason2cc489c2008-10-22 15:59:42 -040077 * sure the contents of bus info block in host memory matches
Kristian Høgsbergc781c062007-05-07 20:33:32 -040078 * the version stored in the OHCI registers.
79 */
Kristian Høgsberg3038e352006-12-19 19:58:27 -050080
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -040081 memset(config_rom, 0, sizeof(config_rom));
Kristian Høgsberga77754a2007-05-07 20:33:35 -040082 config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0);
Kristian Høgsberg3038e352006-12-19 19:58:27 -050083 config_rom[1] = 0x31333934;
84
85 config_rom[2] =
Kristian Høgsberga77754a2007-05-07 20:33:35 -040086 BIB_LINK_SPEED(card->link_speed) |
87 BIB_GENERATION(card->config_rom_generation++ % 14 + 2) |
88 BIB_MAX_ROM(2) |
89 BIB_MAX_RECEIVE(card->max_receive) |
90 BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC;
Kristian Høgsberg3038e352006-12-19 19:58:27 -050091 config_rom[3] = card->guid >> 32;
92 config_rom[4] = card->guid;
93
94 /* Generate root directory. */
95 i = 5;
96 config_rom[i++] = 0;
97 config_rom[i++] = 0x0c0083c0; /* node capabilities */
Kristian Høgsberg3038e352006-12-19 19:58:27 -050098 j = i + descriptor_count;
99
100 /* Generate root directory entries for descriptors. */
101 list_for_each_entry (desc, &descriptor_list, link) {
Kristian Høgsberg937f6872007-03-07 12:12:36 -0500102 if (desc->immediate > 0)
103 config_rom[i++] = desc->immediate;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500104 config_rom[i] = desc->key | (j - i);
105 i++;
106 j += desc->length;
107 }
108
109 /* Update root directory length. */
110 config_rom[5] = (i - 5 - 1) << 16;
111
112 /* End of root directory, now copy in descriptors. */
113 list_for_each_entry (desc, &descriptor_list, link) {
114 memcpy(&config_rom[i], desc->data, desc->length * 4);
115 i += desc->length;
116 }
117
118 /* Calculate CRCs for all blocks in the config rom. This
119 * assumes that CRC length and info length are identical for
120 * the bus info block, which is always the case for this
121 * implementation. */
Kristian Høgsberge1755692007-05-07 20:33:31 -0400122 for (i = 0; i < j; i += length + 1)
123 length = fw_compute_block_crc(config_rom + i);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500124
125 *config_rom_length = j;
126
127 return config_rom;
128}
129
Stefan Richter53dca512008-12-14 21:47:04 +0100130static void update_config_roms(void)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500131{
132 struct fw_card *card;
133 u32 *config_rom;
134 size_t length;
135
136 list_for_each_entry (card, &card_list, link) {
137 config_rom = generate_config_rom(card, &length);
138 card->driver->set_config_rom(card, config_rom, length);
139 }
140}
141
Stefan Richter53dca512008-12-14 21:47:04 +0100142int fw_core_add_descriptor(struct fw_descriptor *desc)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500143{
144 size_t i;
145
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400146 /*
147 * Check descriptor is valid; the length of all blocks in the
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500148 * descriptor has to add up to exactly the length of the
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400149 * block.
150 */
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500151 i = 0;
152 while (i < desc->length)
153 i += (desc->data[i] >> 16) + 1;
154
155 if (i != desc->length)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200156 return -EINVAL;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500157
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400158 mutex_lock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500159
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400160 list_add_tail(&desc->link, &descriptor_list);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500161 descriptor_count++;
Kristian Høgsberg937f6872007-03-07 12:12:36 -0500162 if (desc->immediate > 0)
163 descriptor_count++;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500164 update_config_roms();
165
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400166 mutex_unlock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500167
168 return 0;
169}
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500170
Stefan Richter53dca512008-12-14 21:47:04 +0100171void fw_core_remove_descriptor(struct fw_descriptor *desc)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500172{
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400173 mutex_lock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500174
175 list_del(&desc->link);
176 descriptor_count--;
Kristian Høgsberg937f6872007-03-07 12:12:36 -0500177 if (desc->immediate > 0)
178 descriptor_count--;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500179 update_config_roms();
180
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400181 mutex_unlock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500182}
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500183
Stefan Richter7889b602009-03-10 21:09:28 +0100184static int set_broadcast_channel(struct device *dev, void *data)
Jay Fenlason6104ee92009-02-23 15:59:34 -0500185{
Stefan Richter7889b602009-03-10 21:09:28 +0100186 fw_device_set_broadcast_channel(fw_device(dev), (long)data);
Jay Fenlason6104ee92009-02-23 15:59:34 -0500187 return 0;
188}
189
Stefan Richtercbae7872009-03-10 21:08:37 +0100190static void allocate_broadcast_channel(struct fw_card *card, int generation)
Jay Fenlason6104ee92009-02-23 15:59:34 -0500191{
Stefan Richtercbae7872009-03-10 21:08:37 +0100192 int channel, bandwidth = 0;
Jay Fenlason6104ee92009-02-23 15:59:34 -0500193
Stefan Richtercbae7872009-03-10 21:08:37 +0100194 fw_iso_resource_manage(card, generation, 1ULL << 31,
195 &channel, &bandwidth, true);
196 if (channel == 31) {
Stefan Richter7889b602009-03-10 21:09:28 +0100197 card->broadcast_channel_allocated = true;
198 device_for_each_child(card->device, (void *)(long)generation,
199 set_broadcast_channel);
Jay Fenlason6104ee92009-02-23 15:59:34 -0500200 }
Jay Fenlason6104ee92009-02-23 15:59:34 -0500201}
Jay Fenlason6104ee92009-02-23 15:59:34 -0500202
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500203static const char gap_count_table[] = {
204 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40
205};
206
Stefan Richter53dca512008-12-14 21:47:04 +0100207void fw_schedule_bm_work(struct fw_card *card, unsigned long delay)
Jay Fenlason0fa19862008-11-29 17:44:57 +0100208{
209 int scheduled;
210
211 fw_card_get(card);
212 scheduled = schedule_delayed_work(&card->work, delay);
213 if (!scheduled)
214 fw_card_put(card);
215}
216
Stefan Richter53dca512008-12-14 21:47:04 +0100217static void fw_card_bm_work(struct work_struct *work)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500218{
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500219 struct fw_card *card = container_of(work, struct fw_card, work.work);
Stefan Richtercbae7872009-03-10 21:08:37 +0100220 struct fw_device *root_device;
221 struct fw_node *root_node;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500222 unsigned long flags;
Stefan Richtercbae7872009-03-10 21:08:37 +0100223 int root_id, new_root_id, irm_id, local_id;
224 int gap_count, generation, grace, rcode;
Stefan Richter25b1c3d2008-03-24 20:57:12 +0100225 bool do_reset = false;
Stefan Richter62305822009-01-09 20:49:37 +0100226 bool root_device_is_running;
227 bool root_device_is_cmc;
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200228 __be32 lock_data[2];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500229
230 spin_lock_irqsave(&card->lock, flags);
Stefan Richter15803472008-02-24 18:57:23 +0100231
Stefan Richtercbae7872009-03-10 21:08:37 +0100232 if (card->local_node == NULL) {
Stefan Richter15803472008-02-24 18:57:23 +0100233 spin_unlock_irqrestore(&card->lock, flags);
Jay Fenlason0fa19862008-11-29 17:44:57 +0100234 goto out_put_card;
Stefan Richter15803472008-02-24 18:57:23 +0100235 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500236
237 generation = card->generation;
Stefan Richtercbae7872009-03-10 21:08:37 +0100238 root_node = card->root_node;
239 fw_node_get(root_node);
Stefan Richter15803472008-02-24 18:57:23 +0100240 root_device = root_node->data;
Stefan Richter62305822009-01-09 20:49:37 +0100241 root_device_is_running = root_device &&
242 atomic_read(&root_device->state) == FW_DEVICE_RUNNING;
243 root_device_is_cmc = root_device && root_device->cmc;
Stefan Richtercbae7872009-03-10 21:08:37 +0100244 root_id = root_node->node_id;
245 irm_id = card->irm_node->node_id;
246 local_id = card->local_node->node_id;
Stefan Richtere1dc7ca2009-03-10 21:07:46 +0100247
248 grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8));
249
Stefan Richter8cd0bbb2008-03-24 20:56:40 +0100250 if (is_next_generation(generation, card->bm_generation) ||
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500251 (card->bm_generation != generation && grace)) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400252 /*
253 * This first step is to figure out who is IRM and
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500254 * then try to become bus manager. If the IRM is not
255 * well defined (e.g. does not have an active link
256 * layer or does not responds to our lock request, we
257 * will have to do a little vigilante bus management.
258 * In that case, we do a goto into the gap count logic
259 * so that when we do the reset, we still optimize the
260 * gap count. That could well save a reset in the
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400261 * next generation.
262 */
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500263
Stefan Richtercbae7872009-03-10 21:08:37 +0100264 if (!card->irm_node->link_on) {
265 new_root_id = local_id;
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500266 fw_notify("IRM has link off, making local node (%02x) root.\n",
267 new_root_id);
268 goto pick_me;
269 }
270
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200271 lock_data[0] = cpu_to_be32(0x3f);
Stefan Richtercbae7872009-03-10 21:08:37 +0100272 lock_data[1] = cpu_to_be32(local_id);
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500273
274 spin_unlock_irqrestore(&card->lock, flags);
275
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200276 rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
277 irm_id, generation, SCODE_100,
278 CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
279 lock_data, sizeof(lock_data));
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500280
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200281 if (rcode == RCODE_GENERATION)
282 /* Another bus reset, BM work has been rescheduled. */
Stefan Richter15803472008-02-24 18:57:23 +0100283 goto out;
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500284
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200285 if (rcode == RCODE_COMPLETE &&
Jay Fenlason6104ee92009-02-23 15:59:34 -0500286 lock_data[0] != cpu_to_be32(0x3f)) {
Stefan Richtercbae7872009-03-10 21:08:37 +0100287
288 /* Somebody else is BM. Only act as IRM. */
289 if (local_id == irm_id)
290 allocate_broadcast_channel(card, generation);
291
Stefan Richter15803472008-02-24 18:57:23 +0100292 goto out;
Jay Fenlason6104ee92009-02-23 15:59:34 -0500293 }
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500294
295 spin_lock_irqsave(&card->lock, flags);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200296
297 if (rcode != RCODE_COMPLETE) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400298 /*
299 * The lock request failed, maybe the IRM
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500300 * isn't really IRM capable after all. Let's
301 * do a bus reset and pick the local node as
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400302 * root, and thus, IRM.
303 */
Stefan Richtercbae7872009-03-10 21:08:37 +0100304 new_root_id = local_id;
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500305 fw_notify("BM lock failed, making local node (%02x) root.\n",
306 new_root_id);
307 goto pick_me;
308 }
309 } else if (card->bm_generation != generation) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400310 /*
Stefan Richtere1dc7ca2009-03-10 21:07:46 +0100311 * We weren't BM in the last generation, and the last
312 * bus reset is less than 125ms ago. Reschedule this job.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400313 */
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500314 spin_unlock_irqrestore(&card->lock, flags);
Stefan Richtere1dc7ca2009-03-10 21:07:46 +0100315 fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8));
Stefan Richter15803472008-02-24 18:57:23 +0100316 goto out;
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500317 }
318
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400319 /*
320 * We're bus manager for this generation, so next step is to
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500321 * make sure we have an active cycle master and do gap count
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400322 * optimization.
323 */
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500324 card->bm_generation = generation;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500325
Stefan Richter15803472008-02-24 18:57:23 +0100326 if (root_device == NULL) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400327 /*
328 * Either link_on is false, or we failed to read the
329 * config rom. In either case, pick another root.
330 */
Stefan Richtercbae7872009-03-10 21:08:37 +0100331 new_root_id = local_id;
Stefan Richter62305822009-01-09 20:49:37 +0100332 } else if (!root_device_is_running) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400333 /*
334 * If we haven't probed this device yet, bail out now
335 * and let's try again once that's done.
336 */
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500337 spin_unlock_irqrestore(&card->lock, flags);
Stefan Richter15803472008-02-24 18:57:23 +0100338 goto out;
Stefan Richter62305822009-01-09 20:49:37 +0100339 } else if (root_device_is_cmc) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400340 /*
341 * FIXME: I suppose we should set the cmstr bit in the
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500342 * STATE_CLEAR register of this node, as described in
343 * 1394-1995, 8.4.2.6. Also, send out a force root
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400344 * packet for this node.
345 */
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500346 new_root_id = root_id;
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500347 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400348 /*
349 * Current root has an active link layer and we
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500350 * successfully read the config rom, but it's not
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400351 * cycle master capable.
352 */
Stefan Richtercbae7872009-03-10 21:08:37 +0100353 new_root_id = local_id;
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500354 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500355
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500356 pick_me:
Stefan Richter24d40122007-06-18 19:44:12 +0200357 /*
358 * Pick a gap count from 1394a table E-1. The table doesn't cover
359 * the typically much larger 1394b beta repeater delays though.
360 */
361 if (!card->beta_repeaters_present &&
Stefan Richter15803472008-02-24 18:57:23 +0100362 root_node->max_hops < ARRAY_SIZE(gap_count_table))
363 gap_count = gap_count_table[root_node->max_hops];
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500364 else
365 gap_count = 63;
366
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400367 /*
Stefan Richter25b1c3d2008-03-24 20:57:12 +0100368 * Finally, figure out if we should do a reset or not. If we have
369 * done less than 5 resets with the same physical topology and we
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400370 * have either a new root or a new gap count setting, let's do it.
371 */
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500372
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500373 if (card->bm_retries++ < 5 &&
374 (card->gap_count != gap_count || new_root_id != root_id))
Stefan Richter25b1c3d2008-03-24 20:57:12 +0100375 do_reset = true;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500376
377 spin_unlock_irqrestore(&card->lock, flags);
378
Kristian Høgsberg83db8012007-01-26 00:37:50 -0500379 if (do_reset) {
380 fw_notify("phy config: card %d, new root=%x, gap_count=%d\n",
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500381 card->index, new_root_id, gap_count);
382 fw_send_phy_config(card, new_root_id, generation, gap_count);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500383 fw_core_initiate_bus_reset(card, 1);
Stefan Richtercbae7872009-03-10 21:08:37 +0100384 /* Will allocate broadcast channel after the reset. */
385 } else {
386 if (local_id == irm_id)
387 allocate_broadcast_channel(card, generation);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500388 }
Jay Fenlason6104ee92009-02-23 15:59:34 -0500389
Stefan Richter15803472008-02-24 18:57:23 +0100390 out:
Stefan Richter15803472008-02-24 18:57:23 +0100391 fw_node_put(root_node);
Jay Fenlason0fa19862008-11-29 17:44:57 +0100392 out_put_card:
393 fw_card_put(card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500394}
395
Stefan Richter53dca512008-12-14 21:47:04 +0100396static void flush_timer_callback(unsigned long data)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500397{
398 struct fw_card *card = (struct fw_card *)data;
399
400 fw_flush_transactions(card);
401}
402
Stefan Richter53dca512008-12-14 21:47:04 +0100403void fw_card_initialize(struct fw_card *card,
404 const struct fw_card_driver *driver,
405 struct device *device)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500406{
Kristian Høgsbergbbf19db2007-02-06 14:49:38 -0500407 static atomic_t index = ATOMIC_INIT(-1);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500408
Kristian Høgsbergbbf19db2007-02-06 14:49:38 -0500409 card->index = atomic_inc_return(&index);
Stefan Richter5e20c282007-01-21 20:44:09 +0100410 card->driver = driver;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500411 card->device = device;
Stefan Richter5e20c282007-01-21 20:44:09 +0100412 card->current_tlabel = 0;
413 card->tlabel_mask = 0;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500414 card->color = 0;
Stefan Richtere534fe12008-05-24 16:41:09 +0200415 card->broadcast_channel = BROADCAST_CHANNEL_INITIAL;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500416
Stefan Richter459f7922008-05-24 16:50:22 +0200417 kref_init(&card->kref);
418 init_completion(&card->done);
Stefan Richter5e20c282007-01-21 20:44:09 +0100419 INIT_LIST_HEAD(&card->transaction_list);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500420 spin_lock_init(&card->lock);
421 setup_timer(&card->flush_timer,
422 flush_timer_callback, (unsigned long)card);
423
424 card->local_node = NULL;
425
Kristian Høgsberg931c4832007-01-26 00:38:45 -0500426 INIT_DELAYED_WORK(&card->work, fw_card_bm_work);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500427}
428EXPORT_SYMBOL(fw_card_initialize);
429
Stefan Richter53dca512008-12-14 21:47:04 +0100430int fw_card_add(struct fw_card *card,
431 u32 max_receive, u32 link_speed, u64 guid)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500432{
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500433 u32 *config_rom;
434 size_t length;
Stefan Richtere1eff7a2009-02-03 17:55:19 +0100435 int ret;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500436
437 card->max_receive = max_receive;
438 card->link_speed = link_speed;
439 card->guid = guid;
440
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400441 mutex_lock(&card_mutex);
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400442 config_rom = generate_config_rom(card, &length);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500443 list_add_tail(&card->link, &card_list);
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400444 mutex_unlock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500445
Stefan Richtere1eff7a2009-02-03 17:55:19 +0100446 ret = card->driver->enable(card, config_rom, length);
447 if (ret < 0) {
Petr Vandrovecb7479fe2009-02-01 01:29:35 -0800448 mutex_lock(&card_mutex);
449 list_del(&card->link);
450 mutex_unlock(&card_mutex);
451 }
Stefan Richtere1eff7a2009-02-03 17:55:19 +0100452
453 return ret;
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500454}
455EXPORT_SYMBOL(fw_card_add);
456
457
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400458/*
459 * The next few functions implements a dummy driver that use once a
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500460 * card driver shuts down an fw_card. This allows the driver to
461 * cleanly unload, as all IO to the card will be handled by the dummy
462 * driver instead of calling into the (possibly) unloaded module. The
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400463 * dummy driver just fails all IO.
464 */
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500465
Stefan Richter53dca512008-12-14 21:47:04 +0100466static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500467{
468 BUG();
469 return -1;
470}
471
Stefan Richter53dca512008-12-14 21:47:04 +0100472static int dummy_update_phy_reg(struct fw_card *card, int address,
473 int clear_bits, int set_bits)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500474{
475 return -ENODEV;
476}
477
Stefan Richter53dca512008-12-14 21:47:04 +0100478static int dummy_set_config_rom(struct fw_card *card,
479 u32 *config_rom, size_t length)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500480{
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400481 /*
482 * We take the card out of card_list before setting the dummy
483 * driver, so this should never get called.
484 */
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500485 BUG();
486 return -1;
487}
488
Stefan Richter53dca512008-12-14 21:47:04 +0100489static void dummy_send_request(struct fw_card *card, struct fw_packet *packet)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500490{
Stefan Richter5e20c282007-01-21 20:44:09 +0100491 packet->callback(packet, card, -ENODEV);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500492}
493
Stefan Richter53dca512008-12-14 21:47:04 +0100494static void dummy_send_response(struct fw_card *card, struct fw_packet *packet)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500495{
Stefan Richter5e20c282007-01-21 20:44:09 +0100496 packet->callback(packet, card, -ENODEV);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500497}
498
Stefan Richter53dca512008-12-14 21:47:04 +0100499static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet)
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500500{
501 return -ENOENT;
502}
503
Stefan Richter53dca512008-12-14 21:47:04 +0100504static int dummy_enable_phys_dma(struct fw_card *card,
505 int node_id, int generation)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500506{
507 return -ENODEV;
508}
509
510static struct fw_card_driver dummy_driver = {
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500511 .enable = dummy_enable,
512 .update_phy_reg = dummy_update_phy_reg,
513 .set_config_rom = dummy_set_config_rom,
Stefan Richter5e20c282007-01-21 20:44:09 +0100514 .send_request = dummy_send_request,
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500515 .cancel_packet = dummy_cancel_packet,
Stefan Richter5e20c282007-01-21 20:44:09 +0100516 .send_response = dummy_send_response,
Stefan Richter5af4e5e2007-01-21 20:45:32 +0100517 .enable_phys_dma = dummy_enable_phys_dma,
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500518};
519
Stefan Richter53dca512008-12-14 21:47:04 +0100520void fw_card_release(struct kref *kref)
Stefan Richter459f7922008-05-24 16:50:22 +0200521{
522 struct fw_card *card = container_of(kref, struct fw_card, kref);
523
524 complete(&card->done);
525}
526
Stefan Richter53dca512008-12-14 21:47:04 +0100527void fw_core_remove_card(struct fw_card *card)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500528{
Marc Butlerecab4132007-03-23 10:24:02 -0600529 card->driver->update_phy_reg(card, 4,
530 PHY_LINK_ACTIVE | PHY_CONTENDER, 0);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500531 fw_core_initiate_bus_reset(card, 1);
532
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400533 mutex_lock(&card_mutex);
Stefan Richtere747a5c2009-01-24 20:35:38 +0100534 list_del_init(&card->link);
Kristian Høgsberg6a5033b2007-05-07 20:33:33 -0400535 mutex_unlock(&card_mutex);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500536
537 /* Set up the dummy driver. */
538 card->driver = &dummy_driver;
539
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500540 fw_destroy_nodes(card);
Stefan Richter459f7922008-05-24 16:50:22 +0200541
542 /* Wait for all users, especially device workqueue jobs, to finish. */
543 fw_card_put(card);
544 wait_for_completion(&card->done);
Stefan Richter8a2d9ed2007-08-21 01:05:14 +0200545
Stefan Richter1e8afea2008-07-12 14:51:18 +0200546 WARN_ON(!list_empty(&card->transaction_list));
Stefan Richter8a2d9ed2007-08-21 01:05:14 +0200547 del_timer_sync(&card->flush_timer);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500548}
549EXPORT_SYMBOL(fw_core_remove_card);
550
Stefan Richter53dca512008-12-14 21:47:04 +0100551int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset)
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500552{
Marc Butlerecab4132007-03-23 10:24:02 -0600553 int reg = short_reset ? 5 : 1;
Marc Butlerecab4132007-03-23 10:24:02 -0600554 int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET;
555
556 return card->driver->update_phy_reg(card, reg, 0, bit);
Kristian Høgsberg3038e352006-12-19 19:58:27 -0500557}
558EXPORT_SYMBOL(fw_core_initiate_bus_reset);