Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1 | /* -*- c-basic-offset: 8 -*- |
| 2 | * |
| 3 | * fw-card.c - card level functions |
| 4 | * |
| 5 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software Foundation, |
| 19 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/device.h> |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 25 | #include <linux/rwsem.h> |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 26 | #include <linux/crc-itu-t.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 27 | #include "fw-transaction.h" |
| 28 | #include "fw-topology.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 29 | #include "fw-device.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 30 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 31 | int fw_compute_block_crc(u32 *block) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 32 | { |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 33 | __be32 be32_block[256]; |
| 34 | int i, length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 35 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 36 | length = (*block >> 16) & 0xff; |
| 37 | for (i = 0; i < length; i++) |
| 38 | be32_block[i] = cpu_to_be32(block[i + 1]); |
| 39 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 40 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 41 | return length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 42 | } |
| 43 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 44 | static DECLARE_RWSEM(card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 45 | static LIST_HEAD(card_list); |
| 46 | |
| 47 | static LIST_HEAD(descriptor_list); |
| 48 | static int descriptor_count; |
| 49 | |
| 50 | #define bib_crc(v) ((v) << 0) |
| 51 | #define bib_crc_length(v) ((v) << 16) |
| 52 | #define bib_info_length(v) ((v) << 24) |
| 53 | |
| 54 | #define bib_link_speed(v) ((v) << 0) |
| 55 | #define bib_generation(v) ((v) << 4) |
| 56 | #define bib_max_rom(v) ((v) << 8) |
| 57 | #define bib_max_receive(v) ((v) << 12) |
| 58 | #define bib_cyc_clk_acc(v) ((v) << 16) |
| 59 | #define bib_pmc ((1) << 27) |
| 60 | #define bib_bmc ((1) << 28) |
| 61 | #define bib_isc ((1) << 29) |
| 62 | #define bib_cmc ((1) << 30) |
| 63 | #define bib_imc ((1) << 31) |
| 64 | |
| 65 | static u32 * |
| 66 | generate_config_rom (struct fw_card *card, size_t *config_rom_length) |
| 67 | { |
| 68 | struct fw_descriptor *desc; |
| 69 | static u32 config_rom[256]; |
| 70 | int i, j, length; |
| 71 | |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 72 | /* Initialize contents of config rom buffer. On the OHCI |
| 73 | * controller, block reads to the config rom accesses the host |
| 74 | * memory, but quadlet read access the hardware bus info block |
| 75 | * registers. That's just crack, but it means we should make |
| 76 | * sure the contents of bus info block in host memory mathces |
| 77 | * the version stored in the OHCI registers. */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 78 | |
| 79 | memset(config_rom, 0, sizeof config_rom); |
| 80 | config_rom[0] = bib_crc_length(4) | bib_info_length(4) | bib_crc(0); |
| 81 | config_rom[1] = 0x31333934; |
| 82 | |
| 83 | config_rom[2] = |
| 84 | bib_link_speed(card->link_speed) | |
| 85 | bib_generation(card->config_rom_generation++ % 14 + 2) | |
| 86 | bib_max_rom(2) | |
| 87 | bib_max_receive(card->max_receive) | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 88 | bib_bmc | bib_isc | bib_cmc | bib_imc; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 89 | config_rom[3] = card->guid >> 32; |
| 90 | config_rom[4] = card->guid; |
| 91 | |
| 92 | /* Generate root directory. */ |
| 93 | i = 5; |
| 94 | config_rom[i++] = 0; |
| 95 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 96 | j = i + descriptor_count; |
| 97 | |
| 98 | /* Generate root directory entries for descriptors. */ |
| 99 | list_for_each_entry (desc, &descriptor_list, link) { |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 100 | if (desc->immediate > 0) |
| 101 | config_rom[i++] = desc->immediate; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 102 | config_rom[i] = desc->key | (j - i); |
| 103 | i++; |
| 104 | j += desc->length; |
| 105 | } |
| 106 | |
| 107 | /* Update root directory length. */ |
| 108 | config_rom[5] = (i - 5 - 1) << 16; |
| 109 | |
| 110 | /* End of root directory, now copy in descriptors. */ |
| 111 | list_for_each_entry (desc, &descriptor_list, link) { |
| 112 | memcpy(&config_rom[i], desc->data, desc->length * 4); |
| 113 | i += desc->length; |
| 114 | } |
| 115 | |
| 116 | /* Calculate CRCs for all blocks in the config rom. This |
| 117 | * assumes that CRC length and info length are identical for |
| 118 | * the bus info block, which is always the case for this |
| 119 | * implementation. */ |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame^] | 120 | for (i = 0; i < j; i += length + 1) |
| 121 | length = fw_compute_block_crc(config_rom + i); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 122 | |
| 123 | *config_rom_length = j; |
| 124 | |
| 125 | return config_rom; |
| 126 | } |
| 127 | |
| 128 | static void |
| 129 | update_config_roms (void) |
| 130 | { |
| 131 | struct fw_card *card; |
| 132 | u32 *config_rom; |
| 133 | size_t length; |
| 134 | |
| 135 | list_for_each_entry (card, &card_list, link) { |
| 136 | config_rom = generate_config_rom(card, &length); |
| 137 | card->driver->set_config_rom(card, config_rom, length); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | int |
| 142 | fw_core_add_descriptor (struct fw_descriptor *desc) |
| 143 | { |
| 144 | size_t i; |
| 145 | |
| 146 | /* Check descriptor is valid; the length of all blocks in the |
| 147 | * descriptor has to add up to exactly the length of the |
| 148 | * block. */ |
| 149 | i = 0; |
| 150 | while (i < desc->length) |
| 151 | i += (desc->data[i] >> 16) + 1; |
| 152 | |
| 153 | if (i != desc->length) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 154 | return -EINVAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 155 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 156 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 157 | |
| 158 | list_add_tail (&desc->link, &descriptor_list); |
| 159 | descriptor_count++; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 160 | if (desc->immediate > 0) |
| 161 | descriptor_count++; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 162 | update_config_roms(); |
| 163 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 164 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | EXPORT_SYMBOL(fw_core_add_descriptor); |
| 169 | |
| 170 | void |
| 171 | fw_core_remove_descriptor (struct fw_descriptor *desc) |
| 172 | { |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 173 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 174 | |
| 175 | list_del(&desc->link); |
| 176 | descriptor_count--; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 177 | if (desc->immediate > 0) |
| 178 | descriptor_count--; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 179 | update_config_roms(); |
| 180 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 181 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 182 | } |
| 183 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
| 184 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 185 | static const char gap_count_table[] = { |
| 186 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 |
| 187 | }; |
| 188 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 189 | struct bm_data { |
| 190 | struct fw_transaction t; |
| 191 | struct { |
| 192 | __be32 arg; |
| 193 | __be32 data; |
| 194 | } lock; |
| 195 | u32 old; |
| 196 | int rcode; |
| 197 | struct completion done; |
| 198 | }; |
| 199 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 200 | static void |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 201 | complete_bm_lock(struct fw_card *card, int rcode, |
| 202 | void *payload, size_t length, void *data) |
| 203 | { |
| 204 | struct bm_data *bmd = data; |
| 205 | |
| 206 | if (rcode == RCODE_COMPLETE) |
| 207 | bmd->old = be32_to_cpu(*(__be32 *) payload); |
| 208 | bmd->rcode = rcode; |
| 209 | complete(&bmd->done); |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | fw_card_bm_work(struct work_struct *work) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 214 | { |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 215 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 216 | struct fw_device *root; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 217 | struct bm_data bmd; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 218 | unsigned long flags; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 219 | int root_id, new_root_id, irm_id, gap_count, generation, grace; |
| 220 | int do_reset = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 221 | |
| 222 | spin_lock_irqsave(&card->lock, flags); |
| 223 | |
| 224 | generation = card->generation; |
| 225 | root = card->root_node->data; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 226 | root_id = card->root_node->node_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 227 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
| 228 | |
| 229 | if (card->bm_generation + 1 == generation || |
| 230 | (card->bm_generation != generation && grace)) { |
| 231 | /* This first step is to figure out who is IRM and |
| 232 | * then try to become bus manager. If the IRM is not |
| 233 | * well defined (e.g. does not have an active link |
| 234 | * layer or does not responds to our lock request, we |
| 235 | * will have to do a little vigilante bus management. |
| 236 | * In that case, we do a goto into the gap count logic |
| 237 | * so that when we do the reset, we still optimize the |
| 238 | * gap count. That could well save a reset in the |
| 239 | * next generation. */ |
| 240 | |
| 241 | irm_id = card->irm_node->node_id; |
| 242 | if (!card->irm_node->link_on) { |
| 243 | new_root_id = card->local_node->node_id; |
| 244 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
| 245 | new_root_id); |
| 246 | goto pick_me; |
| 247 | } |
| 248 | |
| 249 | bmd.lock.arg = cpu_to_be32(0x3f); |
| 250 | bmd.lock.data = cpu_to_be32(card->local_node->node_id); |
| 251 | |
| 252 | spin_unlock_irqrestore(&card->lock, flags); |
| 253 | |
| 254 | init_completion(&bmd.done); |
| 255 | fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP, |
| 256 | irm_id, generation, |
| 257 | SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, |
| 258 | &bmd.lock, sizeof bmd.lock, |
| 259 | complete_bm_lock, &bmd); |
| 260 | wait_for_completion(&bmd.done); |
| 261 | |
| 262 | if (bmd.rcode == RCODE_GENERATION) { |
| 263 | /* Another bus reset happened. Just return, |
| 264 | * the BM work has been rescheduled. */ |
| 265 | return; |
| 266 | } |
| 267 | |
| 268 | if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f) |
| 269 | /* Somebody else is BM, let them do the work. */ |
| 270 | return; |
| 271 | |
| 272 | spin_lock_irqsave(&card->lock, flags); |
| 273 | if (bmd.rcode != RCODE_COMPLETE) { |
| 274 | /* The lock request failed, maybe the IRM |
| 275 | * isn't really IRM capable after all. Let's |
| 276 | * do a bus reset and pick the local node as |
| 277 | * root, and thus, IRM. */ |
| 278 | new_root_id = card->local_node->node_id; |
| 279 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
| 280 | new_root_id); |
| 281 | goto pick_me; |
| 282 | } |
| 283 | } else if (card->bm_generation != generation) { |
| 284 | /* OK, we weren't BM in the last generation, and it's |
| 285 | * less than 100ms since last bus reset. Reschedule |
| 286 | * this task 100ms from now. */ |
| 287 | spin_unlock_irqrestore(&card->lock, flags); |
| 288 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); |
| 289 | return; |
| 290 | } |
| 291 | |
| 292 | /* We're bus manager for this generation, so next step is to |
| 293 | * make sure we have an active cycle master and do gap count |
| 294 | * optimization. */ |
| 295 | card->bm_generation = generation; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 296 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 297 | if (root == NULL) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 298 | /* Either link_on is false, or we failed to read the |
| 299 | * config rom. In either case, pick another root. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 300 | new_root_id = card->local_node->node_id; |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 301 | } else if (atomic_read(&root->state) != FW_DEVICE_RUNNING) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 302 | /* If we haven't probed this device yet, bail out now |
| 303 | * and let's try again once that's done. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 304 | spin_unlock_irqrestore(&card->lock, flags); |
| 305 | return; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 306 | } else if (root->config_rom[2] & bib_cmc) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 307 | /* FIXME: I suppose we should set the cmstr bit in the |
| 308 | * STATE_CLEAR register of this node, as described in |
| 309 | * 1394-1995, 8.4.2.6. Also, send out a force root |
| 310 | * packet for this node. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 311 | new_root_id = root_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 312 | } else { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 313 | /* Current root has an active link layer and we |
| 314 | * successfully read the config rom, but it's not |
| 315 | * cycle master capable. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 316 | new_root_id = card->local_node->node_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 317 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 318 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 319 | pick_me: |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 320 | /* Now figure out what gap count to set. */ |
| 321 | if (card->topology_type == FW_TOPOLOGY_A && |
| 322 | card->root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
| 323 | gap_count = gap_count_table[card->root_node->max_hops]; |
| 324 | else |
| 325 | gap_count = 63; |
| 326 | |
| 327 | /* Finally, figure out if we should do a reset or not. If we've |
| 328 | * done less that 5 resets with the same physical topology and we |
| 329 | * have either a new root or a new gap count setting, let's do it. */ |
| 330 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 331 | if (card->bm_retries++ < 5 && |
| 332 | (card->gap_count != gap_count || new_root_id != root_id)) |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 333 | do_reset = 1; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 334 | |
| 335 | spin_unlock_irqrestore(&card->lock, flags); |
| 336 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 337 | if (do_reset) { |
| 338 | 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] | 339 | card->index, new_root_id, gap_count); |
| 340 | fw_send_phy_config(card, new_root_id, generation, gap_count); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 341 | fw_core_initiate_bus_reset(card, 1); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | static void |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 346 | flush_timer_callback(unsigned long data) |
| 347 | { |
| 348 | struct fw_card *card = (struct fw_card *)data; |
| 349 | |
| 350 | fw_flush_transactions(card); |
| 351 | } |
| 352 | |
| 353 | void |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 354 | 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] | 355 | struct device *device) |
| 356 | { |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 357 | static atomic_t index = ATOMIC_INIT(-1); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 358 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 359 | kref_init(&card->kref); |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 360 | card->index = atomic_inc_return(&index); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 361 | card->driver = driver; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 362 | card->device = device; |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 363 | card->current_tlabel = 0; |
| 364 | card->tlabel_mask = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 365 | card->color = 0; |
| 366 | |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 367 | INIT_LIST_HEAD(&card->transaction_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 368 | spin_lock_init(&card->lock); |
| 369 | setup_timer(&card->flush_timer, |
| 370 | flush_timer_callback, (unsigned long)card); |
| 371 | |
| 372 | card->local_node = NULL; |
| 373 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 374 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 375 | } |
| 376 | EXPORT_SYMBOL(fw_card_initialize); |
| 377 | |
| 378 | int |
| 379 | fw_card_add(struct fw_card *card, |
| 380 | u32 max_receive, u32 link_speed, u64 guid) |
| 381 | { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 382 | u32 *config_rom; |
| 383 | size_t length; |
| 384 | |
| 385 | card->max_receive = max_receive; |
| 386 | card->link_speed = link_speed; |
| 387 | card->guid = guid; |
| 388 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 389 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 390 | if (card->driver->update_phy_reg(card, 4, 0, |
| 391 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 392 | return -EIO; |
| 393 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 394 | /* The subsystem grabs a reference when the card is added and |
| 395 | * drops it when the driver calls fw_core_remove_card. */ |
| 396 | fw_card_get(card); |
| 397 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 398 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 399 | config_rom = generate_config_rom (card, &length); |
| 400 | list_add_tail(&card->link, &card_list); |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 401 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 402 | |
| 403 | return card->driver->enable(card, config_rom, length); |
| 404 | } |
| 405 | EXPORT_SYMBOL(fw_card_add); |
| 406 | |
| 407 | |
| 408 | /* The next few functions implements a dummy driver that use once a |
| 409 | * card driver shuts down an fw_card. This allows the driver to |
| 410 | * cleanly unload, as all IO to the card will be handled by the dummy |
| 411 | * driver instead of calling into the (possibly) unloaded module. The |
| 412 | * dummy driver just fails all IO. */ |
| 413 | |
| 414 | static int |
| 415 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
| 416 | { |
| 417 | BUG(); |
| 418 | return -1; |
| 419 | } |
| 420 | |
| 421 | static int |
| 422 | dummy_update_phy_reg(struct fw_card *card, int address, |
| 423 | int clear_bits, int set_bits) |
| 424 | { |
| 425 | return -ENODEV; |
| 426 | } |
| 427 | |
| 428 | static int |
| 429 | dummy_set_config_rom(struct fw_card *card, |
| 430 | u32 *config_rom, size_t length) |
| 431 | { |
| 432 | /* We take the card out of card_list before setting the dummy |
| 433 | * driver, so this should never get called. */ |
| 434 | BUG(); |
| 435 | return -1; |
| 436 | } |
| 437 | |
| 438 | static void |
| 439 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
| 440 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 441 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | static void |
| 445 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
| 446 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 447 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | static int |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 451 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
| 452 | { |
| 453 | return -ENOENT; |
| 454 | } |
| 455 | |
| 456 | static int |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 457 | dummy_enable_phys_dma(struct fw_card *card, |
| 458 | int node_id, int generation) |
| 459 | { |
| 460 | return -ENODEV; |
| 461 | } |
| 462 | |
| 463 | static struct fw_card_driver dummy_driver = { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 464 | .name = "dummy", |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 465 | .enable = dummy_enable, |
| 466 | .update_phy_reg = dummy_update_phy_reg, |
| 467 | .set_config_rom = dummy_set_config_rom, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 468 | .send_request = dummy_send_request, |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 469 | .cancel_packet = dummy_cancel_packet, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 470 | .send_response = dummy_send_response, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 471 | .enable_phys_dma = dummy_enable_phys_dma, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 472 | }; |
| 473 | |
| 474 | void |
| 475 | fw_core_remove_card(struct fw_card *card) |
| 476 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 477 | card->driver->update_phy_reg(card, 4, |
| 478 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 479 | fw_core_initiate_bus_reset(card, 1); |
| 480 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 481 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 482 | list_del(&card->link); |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 483 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 484 | |
| 485 | /* Set up the dummy driver. */ |
| 486 | card->driver = &dummy_driver; |
| 487 | |
| 488 | fw_flush_transactions(card); |
| 489 | |
| 490 | fw_destroy_nodes(card); |
| 491 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 492 | fw_card_put(card); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 493 | } |
| 494 | EXPORT_SYMBOL(fw_core_remove_card); |
| 495 | |
| 496 | struct fw_card * |
| 497 | fw_card_get(struct fw_card *card) |
| 498 | { |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 499 | kref_get(&card->kref); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 500 | |
| 501 | return card; |
| 502 | } |
| 503 | EXPORT_SYMBOL(fw_card_get); |
| 504 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 505 | static void |
| 506 | release_card(struct kref *kref) |
| 507 | { |
| 508 | struct fw_card *card = container_of(kref, struct fw_card, kref); |
| 509 | |
| 510 | kfree(card); |
| 511 | } |
| 512 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 513 | /* An assumption for fw_card_put() is that the card driver allocates |
| 514 | * the fw_card struct with kalloc and that it has been shut down |
| 515 | * before the last ref is dropped. */ |
| 516 | void |
| 517 | fw_card_put(struct fw_card *card) |
| 518 | { |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 519 | kref_put(&card->kref, release_card); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 520 | } |
| 521 | EXPORT_SYMBOL(fw_card_put); |
| 522 | |
| 523 | int |
| 524 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
| 525 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 526 | int reg = short_reset ? 5 : 1; |
| 527 | /* The following values happen to be the same bit. However be |
| 528 | * explicit for clarity. */ |
| 529 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
| 530 | |
| 531 | return card->driver->update_phy_reg(card, reg, 0, bit); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 532 | } |
| 533 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |