Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 3 | * |
| 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 Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 19 | #include <linux/completion.h> |
| 20 | #include <linux/crc-itu-t.h> |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 21 | #include <linux/delay.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 22 | #include <linux/device.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 23 | #include <linux/errno.h> |
| 24 | #include <linux/kref.h> |
| 25 | #include <linux/module.h> |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 27 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 28 | #include "fw-transaction.h" |
| 29 | #include "fw-topology.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 30 | #include "fw-device.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 31 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 32 | int fw_compute_block_crc(u32 *block) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 33 | { |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 34 | __be32 be32_block[256]; |
| 35 | int i, length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 36 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 37 | 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 Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 41 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 42 | return length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 43 | } |
| 44 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 45 | static DEFINE_MUTEX(card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 46 | static LIST_HEAD(card_list); |
| 47 | |
| 48 | static LIST_HEAD(descriptor_list); |
| 49 | static int descriptor_count; |
| 50 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 51 | #define BIB_CRC(v) ((v) << 0) |
| 52 | #define BIB_CRC_LENGTH(v) ((v) << 16) |
| 53 | #define BIB_INFO_LENGTH(v) ((v) << 24) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 54 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 55 | #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 Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 65 | |
| 66 | static u32 * |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 67 | generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 68 | { |
| 69 | struct fw_descriptor *desc; |
| 70 | static u32 config_rom[256]; |
| 71 | int i, j, length; |
| 72 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 73 | /* |
| 74 | * Initialize contents of config rom buffer. On the OHCI |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 75 | * controller, block reads to the config rom accesses the host |
| 76 | * memory, but quadlet read access the hardware bus info block |
| 77 | * registers. That's just crack, but it means we should make |
| 78 | * sure the contents of bus info block in host memory mathces |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 79 | * the version stored in the OHCI registers. |
| 80 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 81 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 82 | memset(config_rom, 0, sizeof(config_rom)); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 83 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 84 | config_rom[1] = 0x31333934; |
| 85 | |
| 86 | config_rom[2] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 87 | BIB_LINK_SPEED(card->link_speed) | |
| 88 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | |
| 89 | BIB_MAX_ROM(2) | |
| 90 | BIB_MAX_RECEIVE(card->max_receive) | |
| 91 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 92 | config_rom[3] = card->guid >> 32; |
| 93 | config_rom[4] = card->guid; |
| 94 | |
| 95 | /* Generate root directory. */ |
| 96 | i = 5; |
| 97 | config_rom[i++] = 0; |
| 98 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 99 | j = i + descriptor_count; |
| 100 | |
| 101 | /* Generate root directory entries for descriptors. */ |
| 102 | list_for_each_entry (desc, &descriptor_list, link) { |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 103 | if (desc->immediate > 0) |
| 104 | config_rom[i++] = desc->immediate; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 105 | config_rom[i] = desc->key | (j - i); |
| 106 | i++; |
| 107 | j += desc->length; |
| 108 | } |
| 109 | |
| 110 | /* Update root directory length. */ |
| 111 | config_rom[5] = (i - 5 - 1) << 16; |
| 112 | |
| 113 | /* End of root directory, now copy in descriptors. */ |
| 114 | list_for_each_entry (desc, &descriptor_list, link) { |
| 115 | memcpy(&config_rom[i], desc->data, desc->length * 4); |
| 116 | i += desc->length; |
| 117 | } |
| 118 | |
| 119 | /* Calculate CRCs for all blocks in the config rom. This |
| 120 | * assumes that CRC length and info length are identical for |
| 121 | * the bus info block, which is always the case for this |
| 122 | * implementation. */ |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 123 | for (i = 0; i < j; i += length + 1) |
| 124 | length = fw_compute_block_crc(config_rom + i); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 125 | |
| 126 | *config_rom_length = j; |
| 127 | |
| 128 | return config_rom; |
| 129 | } |
| 130 | |
| 131 | static void |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 132 | update_config_roms(void) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 133 | { |
| 134 | struct fw_card *card; |
| 135 | u32 *config_rom; |
| 136 | size_t length; |
| 137 | |
| 138 | list_for_each_entry (card, &card_list, link) { |
| 139 | config_rom = generate_config_rom(card, &length); |
| 140 | card->driver->set_config_rom(card, config_rom, length); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | int |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 145 | fw_core_add_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 146 | { |
| 147 | size_t i; |
| 148 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 149 | /* |
| 150 | * Check descriptor is valid; the length of all blocks in the |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 151 | * descriptor has to add up to exactly the length of the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 152 | * block. |
| 153 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 154 | i = 0; |
| 155 | while (i < desc->length) |
| 156 | i += (desc->data[i] >> 16) + 1; |
| 157 | |
| 158 | if (i != desc->length) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 159 | return -EINVAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 160 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 161 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 162 | |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 163 | list_add_tail(&desc->link, &descriptor_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 164 | descriptor_count++; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 165 | if (desc->immediate > 0) |
| 166 | descriptor_count++; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 167 | update_config_roms(); |
| 168 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 169 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 170 | |
| 171 | return 0; |
| 172 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 173 | |
| 174 | void |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 175 | fw_core_remove_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 176 | { |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 177 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 178 | |
| 179 | list_del(&desc->link); |
| 180 | descriptor_count--; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 181 | if (desc->immediate > 0) |
| 182 | descriptor_count--; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 183 | update_config_roms(); |
| 184 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 185 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 186 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 187 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 188 | static const char gap_count_table[] = { |
| 189 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 |
| 190 | }; |
| 191 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 192 | struct bm_data { |
| 193 | struct fw_transaction t; |
| 194 | struct { |
| 195 | __be32 arg; |
| 196 | __be32 data; |
| 197 | } lock; |
| 198 | u32 old; |
| 199 | int rcode; |
| 200 | struct completion done; |
| 201 | }; |
| 202 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 203 | static void |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 204 | complete_bm_lock(struct fw_card *card, int rcode, |
| 205 | void *payload, size_t length, void *data) |
| 206 | { |
| 207 | struct bm_data *bmd = data; |
| 208 | |
| 209 | if (rcode == RCODE_COMPLETE) |
| 210 | bmd->old = be32_to_cpu(*(__be32 *) payload); |
| 211 | bmd->rcode = rcode; |
| 212 | complete(&bmd->done); |
| 213 | } |
| 214 | |
| 215 | static void |
| 216 | fw_card_bm_work(struct work_struct *work) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 217 | { |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 218 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 219 | struct fw_device *root_device; |
| 220 | struct fw_node *root_node, *local_node; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 221 | struct bm_data bmd; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 222 | unsigned long flags; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 223 | int root_id, new_root_id, irm_id, gap_count, generation, grace; |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 224 | bool do_reset = false; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 225 | |
| 226 | spin_lock_irqsave(&card->lock, flags); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 227 | local_node = card->local_node; |
| 228 | root_node = card->root_node; |
| 229 | |
| 230 | if (local_node == NULL) { |
| 231 | spin_unlock_irqrestore(&card->lock, flags); |
| 232 | return; |
| 233 | } |
| 234 | fw_node_get(local_node); |
| 235 | fw_node_get(root_node); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 236 | |
| 237 | generation = card->generation; |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 238 | root_device = root_node->data; |
| 239 | if (root_device) |
| 240 | fw_device_get(root_device); |
| 241 | root_id = root_node->node_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 242 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
| 243 | |
| 244 | if (card->bm_generation + 1 == generation || |
| 245 | (card->bm_generation != generation && grace)) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 246 | /* |
| 247 | * This first step is to figure out who is IRM and |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 248 | * then try to become bus manager. If the IRM is not |
| 249 | * well defined (e.g. does not have an active link |
| 250 | * layer or does not responds to our lock request, we |
| 251 | * will have to do a little vigilante bus management. |
| 252 | * In that case, we do a goto into the gap count logic |
| 253 | * so that when we do the reset, we still optimize the |
| 254 | * gap count. That could well save a reset in the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 255 | * next generation. |
| 256 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 257 | |
| 258 | irm_id = card->irm_node->node_id; |
| 259 | if (!card->irm_node->link_on) { |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 260 | new_root_id = local_node->node_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 261 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
| 262 | new_root_id); |
| 263 | goto pick_me; |
| 264 | } |
| 265 | |
| 266 | bmd.lock.arg = cpu_to_be32(0x3f); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 267 | bmd.lock.data = cpu_to_be32(local_node->node_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 268 | |
| 269 | spin_unlock_irqrestore(&card->lock, flags); |
| 270 | |
| 271 | init_completion(&bmd.done); |
| 272 | fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP, |
| 273 | irm_id, generation, |
| 274 | SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 275 | &bmd.lock, sizeof(bmd.lock), |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 276 | complete_bm_lock, &bmd); |
| 277 | wait_for_completion(&bmd.done); |
| 278 | |
| 279 | if (bmd.rcode == RCODE_GENERATION) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 280 | /* |
| 281 | * Another bus reset happened. Just return, |
| 282 | * the BM work has been rescheduled. |
| 283 | */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 284 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f) |
| 288 | /* Somebody else is BM, let them do the work. */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 289 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 290 | |
| 291 | spin_lock_irqsave(&card->lock, flags); |
| 292 | if (bmd.rcode != RCODE_COMPLETE) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 293 | /* |
| 294 | * The lock request failed, maybe the IRM |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 295 | * isn't really IRM capable after all. Let's |
| 296 | * do a bus reset and pick the local node as |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 297 | * root, and thus, IRM. |
| 298 | */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 299 | new_root_id = local_node->node_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 300 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
| 301 | new_root_id); |
| 302 | goto pick_me; |
| 303 | } |
| 304 | } else if (card->bm_generation != generation) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 305 | /* |
| 306 | * OK, we weren't BM in the last generation, and it's |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 307 | * less than 100ms since last bus reset. Reschedule |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 308 | * this task 100ms from now. |
| 309 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 310 | spin_unlock_irqrestore(&card->lock, flags); |
| 311 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 312 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 313 | } |
| 314 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 315 | /* |
| 316 | * We're bus manager for this generation, so next step is to |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 317 | * make sure we have an active cycle master and do gap count |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 318 | * optimization. |
| 319 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 320 | card->bm_generation = generation; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 321 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 322 | if (root_device == NULL) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 323 | /* |
| 324 | * Either link_on is false, or we failed to read the |
| 325 | * config rom. In either case, pick another root. |
| 326 | */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 327 | new_root_id = local_node->node_id; |
| 328 | } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 329 | /* |
| 330 | * If we haven't probed this device yet, bail out now |
| 331 | * and let's try again once that's done. |
| 332 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 333 | spin_unlock_irqrestore(&card->lock, flags); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 334 | goto out; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 335 | } else if (root_device->cmc) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 336 | /* |
| 337 | * FIXME: I suppose we should set the cmstr bit in the |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 338 | * STATE_CLEAR register of this node, as described in |
| 339 | * 1394-1995, 8.4.2.6. Also, send out a force root |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 340 | * packet for this node. |
| 341 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 342 | new_root_id = root_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 343 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 344 | /* |
| 345 | * Current root has an active link layer and we |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 346 | * successfully read the config rom, but it's not |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 347 | * cycle master capable. |
| 348 | */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 349 | new_root_id = local_node->node_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 350 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 351 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 352 | pick_me: |
Stefan Richter | 24d4012 | 2007-06-18 19:44:12 +0200 | [diff] [blame] | 353 | /* |
| 354 | * Pick a gap count from 1394a table E-1. The table doesn't cover |
| 355 | * the typically much larger 1394b beta repeater delays though. |
| 356 | */ |
| 357 | if (!card->beta_repeaters_present && |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 358 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
| 359 | gap_count = gap_count_table[root_node->max_hops]; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 360 | else |
| 361 | gap_count = 63; |
| 362 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 363 | /* |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 364 | * Finally, figure out if we should do a reset or not. If we have |
| 365 | * done less than 5 resets with the same physical topology and we |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 366 | * have either a new root or a new gap count setting, let's do it. |
| 367 | */ |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 368 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 369 | if (card->bm_retries++ < 5 && |
| 370 | (card->gap_count != gap_count || new_root_id != root_id)) |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 371 | do_reset = true; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 372 | |
| 373 | spin_unlock_irqrestore(&card->lock, flags); |
| 374 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 375 | if (do_reset) { |
| 376 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 377 | card->index, new_root_id, gap_count); |
| 378 | fw_send_phy_config(card, new_root_id, generation, gap_count); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 379 | fw_core_initiate_bus_reset(card, 1); |
| 380 | } |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 381 | out: |
| 382 | if (root_device) |
| 383 | fw_device_put(root_device); |
| 384 | fw_node_put(root_node); |
| 385 | fw_node_put(local_node); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | static void |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 389 | flush_timer_callback(unsigned long data) |
| 390 | { |
| 391 | struct fw_card *card = (struct fw_card *)data; |
| 392 | |
| 393 | fw_flush_transactions(card); |
| 394 | } |
| 395 | |
| 396 | void |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 397 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 398 | struct device *device) |
| 399 | { |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 400 | static atomic_t index = ATOMIC_INIT(-1); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 401 | |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 402 | card->index = atomic_inc_return(&index); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 403 | card->driver = driver; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 404 | card->device = device; |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 405 | card->current_tlabel = 0; |
| 406 | card->tlabel_mask = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 407 | card->color = 0; |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 408 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 409 | |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 410 | kref_init(&card->kref); |
| 411 | init_completion(&card->done); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 412 | INIT_LIST_HEAD(&card->transaction_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 413 | spin_lock_init(&card->lock); |
| 414 | setup_timer(&card->flush_timer, |
| 415 | flush_timer_callback, (unsigned long)card); |
| 416 | |
| 417 | card->local_node = NULL; |
| 418 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 419 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 420 | } |
| 421 | EXPORT_SYMBOL(fw_card_initialize); |
| 422 | |
| 423 | int |
| 424 | fw_card_add(struct fw_card *card, |
| 425 | u32 max_receive, u32 link_speed, u64 guid) |
| 426 | { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 427 | u32 *config_rom; |
| 428 | size_t length; |
| 429 | |
| 430 | card->max_receive = max_receive; |
| 431 | card->link_speed = link_speed; |
| 432 | card->guid = guid; |
| 433 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 434 | mutex_lock(&card_mutex); |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 435 | config_rom = generate_config_rom(card, &length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 436 | list_add_tail(&card->link, &card_list); |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 437 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 438 | |
| 439 | return card->driver->enable(card, config_rom, length); |
| 440 | } |
| 441 | EXPORT_SYMBOL(fw_card_add); |
| 442 | |
| 443 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 444 | /* |
| 445 | * The next few functions implements a dummy driver that use once a |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 446 | * card driver shuts down an fw_card. This allows the driver to |
| 447 | * cleanly unload, as all IO to the card will be handled by the dummy |
| 448 | * driver instead of calling into the (possibly) unloaded module. The |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 449 | * dummy driver just fails all IO. |
| 450 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 451 | |
| 452 | static int |
| 453 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
| 454 | { |
| 455 | BUG(); |
| 456 | return -1; |
| 457 | } |
| 458 | |
| 459 | static int |
| 460 | dummy_update_phy_reg(struct fw_card *card, int address, |
| 461 | int clear_bits, int set_bits) |
| 462 | { |
| 463 | return -ENODEV; |
| 464 | } |
| 465 | |
| 466 | static int |
| 467 | dummy_set_config_rom(struct fw_card *card, |
| 468 | u32 *config_rom, size_t length) |
| 469 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 470 | /* |
| 471 | * We take the card out of card_list before setting the dummy |
| 472 | * driver, so this should never get called. |
| 473 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 474 | BUG(); |
| 475 | return -1; |
| 476 | } |
| 477 | |
| 478 | static void |
| 479 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
| 480 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 481 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | static void |
| 485 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
| 486 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 487 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | static int |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 491 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
| 492 | { |
| 493 | return -ENOENT; |
| 494 | } |
| 495 | |
| 496 | static int |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 497 | dummy_enable_phys_dma(struct fw_card *card, |
| 498 | int node_id, int generation) |
| 499 | { |
| 500 | return -ENODEV; |
| 501 | } |
| 502 | |
| 503 | static struct fw_card_driver dummy_driver = { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 504 | .enable = dummy_enable, |
| 505 | .update_phy_reg = dummy_update_phy_reg, |
| 506 | .set_config_rom = dummy_set_config_rom, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 507 | .send_request = dummy_send_request, |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 508 | .cancel_packet = dummy_cancel_packet, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 509 | .send_response = dummy_send_response, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 510 | .enable_phys_dma = dummy_enable_phys_dma, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 511 | }; |
| 512 | |
| 513 | void |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 514 | fw_card_release(struct kref *kref) |
| 515 | { |
| 516 | struct fw_card *card = container_of(kref, struct fw_card, kref); |
| 517 | |
| 518 | complete(&card->done); |
| 519 | } |
| 520 | |
| 521 | void |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 522 | fw_core_remove_card(struct fw_card *card) |
| 523 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 524 | card->driver->update_phy_reg(card, 4, |
| 525 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 526 | fw_core_initiate_bus_reset(card, 1); |
| 527 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 528 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 529 | list_del(&card->link); |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 530 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 531 | |
| 532 | /* Set up the dummy driver. */ |
| 533 | card->driver = &dummy_driver; |
| 534 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 535 | fw_destroy_nodes(card); |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 536 | |
| 537 | /* Wait for all users, especially device workqueue jobs, to finish. */ |
| 538 | fw_card_put(card); |
| 539 | wait_for_completion(&card->done); |
Stefan Richter | 8a2d9ed | 2007-08-21 01:05:14 +0200 | [diff] [blame] | 540 | |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 541 | cancel_delayed_work_sync(&card->work); |
Stefan Richter | 1e8afea | 2008-07-12 14:51:18 +0200 | [diff] [blame] | 542 | WARN_ON(!list_empty(&card->transaction_list)); |
Stefan Richter | 8a2d9ed | 2007-08-21 01:05:14 +0200 | [diff] [blame] | 543 | del_timer_sync(&card->flush_timer); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 544 | } |
| 545 | EXPORT_SYMBOL(fw_core_remove_card); |
| 546 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 547 | int |
| 548 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
| 549 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 550 | int reg = short_reset ? 5 : 1; |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 551 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
| 552 | |
| 553 | return card->driver->update_phy_reg(card, reg, 0, bit); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 554 | } |
| 555 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |