Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Core IEEE1394 transaction logic |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 5 | * |
| 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 |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 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, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/pci.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/poll.h> |
| 28 | #include <linux/list.h> |
| 29 | #include <linux/kthread.h> |
| 30 | #include <asm/uaccess.h> |
| 31 | #include <asm/semaphore.h> |
| 32 | |
| 33 | #include "fw-transaction.h" |
| 34 | #include "fw-topology.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 35 | #include "fw-device.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 36 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 37 | #define HEADER_PRI(pri) ((pri) << 0) |
| 38 | #define HEADER_TCODE(tcode) ((tcode) << 4) |
| 39 | #define HEADER_RETRY(retry) ((retry) << 8) |
| 40 | #define HEADER_TLABEL(tlabel) ((tlabel) << 10) |
| 41 | #define HEADER_DESTINATION(destination) ((destination) << 16) |
| 42 | #define HEADER_SOURCE(source) ((source) << 16) |
| 43 | #define HEADER_RCODE(rcode) ((rcode) << 12) |
| 44 | #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) |
| 45 | #define HEADER_DATA_LENGTH(length) ((length) << 16) |
| 46 | #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 47 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 48 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) |
| 49 | #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) |
| 50 | #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) |
| 51 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
| 52 | #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) |
| 53 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) |
| 54 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) |
| 55 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 56 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 57 | #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) |
| 58 | #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) |
| 59 | #define PHY_IDENTIFIER(id) ((id) << 30) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 60 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 61 | static int |
| 62 | close_transaction(struct fw_transaction *transaction, |
| 63 | struct fw_card *card, int rcode, |
| 64 | u32 *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 65 | { |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 66 | struct fw_transaction *t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 67 | unsigned long flags; |
| 68 | |
| 69 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 70 | list_for_each_entry(t, &card->transaction_list, link) { |
| 71 | if (t == transaction) { |
| 72 | list_del(&t->link); |
| 73 | card->tlabel_mask &= ~(1 << t->tlabel); |
| 74 | break; |
| 75 | } |
| 76 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 77 | spin_unlock_irqrestore(&card->lock, flags); |
| 78 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 79 | if (&t->link != &card->transaction_list) { |
| 80 | t->callback(card, rcode, payload, length, t->callback_data); |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | return -ENOENT; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 85 | } |
| 86 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 87 | /* |
| 88 | * Only valid for transactions that are potentially pending (ie have |
| 89 | * been sent). |
| 90 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 91 | int |
| 92 | fw_cancel_transaction(struct fw_card *card, |
| 93 | struct fw_transaction *transaction) |
| 94 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 95 | /* |
| 96 | * Cancel the packet transmission if it's still queued. That |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 97 | * will call the packet transmission callback which cancels |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 98 | * the transaction. |
| 99 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 100 | |
| 101 | if (card->driver->cancel_packet(card, &transaction->packet) == 0) |
| 102 | return 0; |
| 103 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 104 | /* |
| 105 | * If the request packet has already been sent, we need to see |
| 106 | * if the transaction is still pending and remove it in that case. |
| 107 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 108 | |
| 109 | return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0); |
| 110 | } |
| 111 | EXPORT_SYMBOL(fw_cancel_transaction); |
| 112 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 113 | static void |
| 114 | transmit_complete_callback(struct fw_packet *packet, |
| 115 | struct fw_card *card, int status) |
| 116 | { |
| 117 | struct fw_transaction *t = |
| 118 | container_of(packet, struct fw_transaction, packet); |
| 119 | |
| 120 | switch (status) { |
| 121 | case ACK_COMPLETE: |
| 122 | close_transaction(t, card, RCODE_COMPLETE, NULL, 0); |
| 123 | break; |
| 124 | case ACK_PENDING: |
| 125 | t->timestamp = packet->timestamp; |
| 126 | break; |
| 127 | case ACK_BUSY_X: |
| 128 | case ACK_BUSY_A: |
| 129 | case ACK_BUSY_B: |
| 130 | close_transaction(t, card, RCODE_BUSY, NULL, 0); |
| 131 | break; |
| 132 | case ACK_DATA_ERROR: |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 133 | close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0); |
| 134 | break; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 135 | case ACK_TYPE_ERROR: |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 136 | close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 137 | break; |
| 138 | default: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 139 | /* |
| 140 | * In this case the ack is really a juju specific |
| 141 | * rcode, so just forward that to the callback. |
| 142 | */ |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 143 | close_transaction(t, card, status, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 144 | break; |
| 145 | } |
| 146 | } |
| 147 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 148 | static void |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 149 | fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 150 | int node_id, int source_id, int generation, int speed, |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 151 | unsigned long long offset, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 152 | { |
| 153 | int ext_tcode; |
| 154 | |
| 155 | if (tcode > 0x10) { |
| 156 | ext_tcode = tcode - 0x10; |
| 157 | tcode = TCODE_LOCK_REQUEST; |
| 158 | } else |
| 159 | ext_tcode = 0; |
| 160 | |
| 161 | packet->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 162 | HEADER_RETRY(RETRY_X) | |
| 163 | HEADER_TLABEL(tlabel) | |
| 164 | HEADER_TCODE(tcode) | |
| 165 | HEADER_DESTINATION(node_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 166 | packet->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 167 | HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 168 | packet->header[2] = |
| 169 | offset; |
| 170 | |
| 171 | switch (tcode) { |
| 172 | case TCODE_WRITE_QUADLET_REQUEST: |
| 173 | packet->header[3] = *(u32 *)payload; |
| 174 | packet->header_length = 16; |
| 175 | packet->payload_length = 0; |
| 176 | break; |
| 177 | |
| 178 | case TCODE_LOCK_REQUEST: |
| 179 | case TCODE_WRITE_BLOCK_REQUEST: |
| 180 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 181 | HEADER_DATA_LENGTH(length) | |
| 182 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 183 | packet->header_length = 16; |
| 184 | packet->payload = payload; |
| 185 | packet->payload_length = length; |
| 186 | break; |
| 187 | |
| 188 | case TCODE_READ_QUADLET_REQUEST: |
| 189 | packet->header_length = 12; |
| 190 | packet->payload_length = 0; |
| 191 | break; |
| 192 | |
| 193 | case TCODE_READ_BLOCK_REQUEST: |
| 194 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 195 | HEADER_DATA_LENGTH(length) | |
| 196 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 197 | packet->header_length = 16; |
| 198 | packet->payload_length = 0; |
| 199 | break; |
| 200 | } |
| 201 | |
| 202 | packet->speed = speed; |
| 203 | packet->generation = generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 204 | packet->ack = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | /** |
| 208 | * This function provides low-level access to the IEEE1394 transaction |
| 209 | * logic. Most C programs would use either fw_read(), fw_write() or |
| 210 | * fw_lock() instead - those function are convenience wrappers for |
| 211 | * this function. The fw_send_request() function is primarily |
| 212 | * provided as a flexible, one-stop entry point for languages bindings |
| 213 | * and protocol bindings. |
| 214 | * |
| 215 | * FIXME: Document this function further, in particular the possible |
| 216 | * values for rcode in the callback. In short, we map ACK_COMPLETE to |
| 217 | * RCODE_COMPLETE, internal errors set errno and set rcode to |
| 218 | * RCODE_SEND_ERROR (which is out of range for standard ieee1394 |
| 219 | * rcodes). All other rcodes are forwarded unchanged. For all |
| 220 | * errors, payload is NULL, length is 0. |
| 221 | * |
| 222 | * Can not expect the callback to be called before the function |
| 223 | * returns, though this does happen in some cases (ACK_COMPLETE and |
| 224 | * errors). |
| 225 | * |
| 226 | * The payload is only used for write requests and must not be freed |
| 227 | * until the callback has been called. |
| 228 | * |
| 229 | * @param card the card from which to send the request |
| 230 | * @param tcode the tcode for this transaction. Do not use |
| 231 | * TCODE_LOCK_REQUEST directly, insted use TCODE_LOCK_MASK_SWAP |
| 232 | * etc. to specify tcode and ext_tcode. |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 233 | * @param node_id the destination node ID (bus ID and PHY ID concatenated) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 234 | * @param generation the generation for which node_id is valid |
| 235 | * @param speed the speed to use for sending the request |
| 236 | * @param offset the 48 bit offset on the destination node |
| 237 | * @param payload the data payload for the request subaction |
| 238 | * @param length the length in bytes of the data to read |
| 239 | * @param callback function to be called when the transaction is completed |
| 240 | * @param callback_data pointer to arbitrary data, which will be |
| 241 | * passed to the callback |
| 242 | */ |
| 243 | void |
| 244 | fw_send_request(struct fw_card *card, struct fw_transaction *t, |
| 245 | int tcode, int node_id, int generation, int speed, |
| 246 | unsigned long long offset, |
| 247 | void *payload, size_t length, |
| 248 | fw_transaction_callback_t callback, void *callback_data) |
| 249 | { |
| 250 | unsigned long flags; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 251 | int tlabel, source; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 252 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 253 | /* |
| 254 | * Bump the flush timer up 100ms first of all so we |
| 255 | * don't race with a flush timer callback. |
| 256 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 257 | |
| 258 | mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10)); |
| 259 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 260 | /* |
| 261 | * Allocate tlabel from the bitmap and put the transaction on |
| 262 | * the list while holding the card spinlock. |
| 263 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 264 | |
| 265 | spin_lock_irqsave(&card->lock, flags); |
| 266 | |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 267 | source = card->node_id; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 268 | tlabel = card->current_tlabel; |
| 269 | if (card->tlabel_mask & (1 << tlabel)) { |
| 270 | spin_unlock_irqrestore(&card->lock, flags); |
| 271 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | card->current_tlabel = (card->current_tlabel + 1) & 0x1f; |
| 276 | card->tlabel_mask |= (1 << tlabel); |
| 277 | |
| 278 | list_add_tail(&t->link, &card->transaction_list); |
| 279 | |
| 280 | spin_unlock_irqrestore(&card->lock, flags); |
| 281 | |
| 282 | /* Initialize rest of transaction, fill out packet and send it. */ |
| 283 | t->node_id = node_id; |
| 284 | t->tlabel = tlabel; |
| 285 | t->callback = callback; |
| 286 | t->callback_data = callback_data; |
| 287 | |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 288 | fw_fill_request(&t->packet, tcode, t->tlabel, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 289 | node_id, source, generation, |
| 290 | speed, offset, payload, length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 291 | t->packet.callback = transmit_complete_callback; |
| 292 | |
| 293 | card->driver->send_request(card, &t->packet); |
| 294 | } |
| 295 | EXPORT_SYMBOL(fw_send_request); |
| 296 | |
| 297 | static void |
| 298 | transmit_phy_packet_callback(struct fw_packet *packet, |
| 299 | struct fw_card *card, int status) |
| 300 | { |
| 301 | kfree(packet); |
| 302 | } |
| 303 | |
| 304 | static void send_phy_packet(struct fw_card *card, u32 data, int generation) |
| 305 | { |
| 306 | struct fw_packet *packet; |
| 307 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 308 | packet = kzalloc(sizeof(*packet), GFP_ATOMIC); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 309 | if (packet == NULL) |
| 310 | return; |
| 311 | |
| 312 | packet->header[0] = data; |
| 313 | packet->header[1] = ~data; |
| 314 | packet->header_length = 8; |
| 315 | packet->payload_length = 0; |
| 316 | packet->speed = SCODE_100; |
| 317 | packet->generation = generation; |
| 318 | packet->callback = transmit_phy_packet_callback; |
| 319 | |
| 320 | card->driver->send_request(card, packet); |
| 321 | } |
| 322 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 323 | void fw_send_phy_config(struct fw_card *card, |
| 324 | int node_id, int generation, int gap_count) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 325 | { |
| 326 | u32 q; |
| 327 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 328 | q = PHY_IDENTIFIER(PHY_PACKET_CONFIG) | |
| 329 | PHY_CONFIG_ROOT_ID(node_id) | |
| 330 | PHY_CONFIG_GAP_COUNT(gap_count); |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 331 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 332 | send_phy_packet(card, q, generation); |
| 333 | } |
| 334 | |
| 335 | void fw_flush_transactions(struct fw_card *card) |
| 336 | { |
| 337 | struct fw_transaction *t, *next; |
| 338 | struct list_head list; |
| 339 | unsigned long flags; |
| 340 | |
| 341 | INIT_LIST_HEAD(&list); |
| 342 | spin_lock_irqsave(&card->lock, flags); |
| 343 | list_splice_init(&card->transaction_list, &list); |
| 344 | card->tlabel_mask = 0; |
| 345 | spin_unlock_irqrestore(&card->lock, flags); |
| 346 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 347 | list_for_each_entry_safe(t, next, &list, link) { |
| 348 | card->driver->cancel_packet(card, &t->packet); |
| 349 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 350 | /* |
| 351 | * At this point cancel_packet will never call the |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 352 | * transaction callback, since we just took all the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 353 | * transactions out of the list. So do it here. |
| 354 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 355 | t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 356 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | static struct fw_address_handler * |
| 360 | lookup_overlapping_address_handler(struct list_head *list, |
| 361 | unsigned long long offset, size_t length) |
| 362 | { |
| 363 | struct fw_address_handler *handler; |
| 364 | |
| 365 | list_for_each_entry(handler, list, link) { |
| 366 | if (handler->offset < offset + length && |
| 367 | offset < handler->offset + handler->length) |
| 368 | return handler; |
| 369 | } |
| 370 | |
| 371 | return NULL; |
| 372 | } |
| 373 | |
| 374 | static struct fw_address_handler * |
| 375 | lookup_enclosing_address_handler(struct list_head *list, |
| 376 | unsigned long long offset, size_t length) |
| 377 | { |
| 378 | struct fw_address_handler *handler; |
| 379 | |
| 380 | list_for_each_entry(handler, list, link) { |
| 381 | if (handler->offset <= offset && |
| 382 | offset + length <= handler->offset + handler->length) |
| 383 | return handler; |
| 384 | } |
| 385 | |
| 386 | return NULL; |
| 387 | } |
| 388 | |
| 389 | static DEFINE_SPINLOCK(address_handler_lock); |
| 390 | static LIST_HEAD(address_handler_list); |
| 391 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 392 | const struct fw_address_region fw_low_memory_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 393 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 394 | const struct fw_address_region fw_high_memory_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 395 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 396 | const struct fw_address_region fw_private_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 397 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 398 | const struct fw_address_region fw_csr_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 399 | { .start = 0xfffff0000000ULL, .end = 0xfffff0000800ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 400 | const struct fw_address_region fw_unit_space_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 401 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 402 | EXPORT_SYMBOL(fw_low_memory_region); |
| 403 | EXPORT_SYMBOL(fw_high_memory_region); |
| 404 | EXPORT_SYMBOL(fw_private_region); |
| 405 | EXPORT_SYMBOL(fw_csr_region); |
| 406 | EXPORT_SYMBOL(fw_unit_space_region); |
| 407 | |
| 408 | /** |
| 409 | * Allocate a range of addresses in the node space of the OHCI |
| 410 | * controller. When a request is received that falls within the |
| 411 | * specified address range, the specified callback is invoked. The |
| 412 | * parameters passed to the callback give the details of the |
| 413 | * particular request |
| 414 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 415 | int |
| 416 | fw_core_add_address_handler(struct fw_address_handler *handler, |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 417 | const struct fw_address_region *region) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 418 | { |
| 419 | struct fw_address_handler *other; |
| 420 | unsigned long flags; |
| 421 | int ret = -EBUSY; |
| 422 | |
| 423 | spin_lock_irqsave(&address_handler_lock, flags); |
| 424 | |
| 425 | handler->offset = region->start; |
| 426 | while (handler->offset + handler->length <= region->end) { |
| 427 | other = |
| 428 | lookup_overlapping_address_handler(&address_handler_list, |
| 429 | handler->offset, |
| 430 | handler->length); |
| 431 | if (other != NULL) { |
| 432 | handler->offset += other->length; |
| 433 | } else { |
| 434 | list_add_tail(&handler->link, &address_handler_list); |
| 435 | ret = 0; |
| 436 | break; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 441 | |
| 442 | return ret; |
| 443 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 444 | EXPORT_SYMBOL(fw_core_add_address_handler); |
| 445 | |
| 446 | /** |
| 447 | * Deallocate a range of addresses allocated with fw_allocate. This |
| 448 | * will call the associated callback one last time with a the special |
| 449 | * tcode TCODE_DEALLOCATE, to let the client destroy the registered |
| 450 | * callback data. For convenience, the callback parameters offset and |
| 451 | * length are set to the start and the length respectively for the |
| 452 | * deallocated region, payload is set to NULL. |
| 453 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 454 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
| 455 | { |
| 456 | unsigned long flags; |
| 457 | |
| 458 | spin_lock_irqsave(&address_handler_lock, flags); |
| 459 | list_del(&handler->link); |
| 460 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 461 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 462 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
| 463 | |
| 464 | struct fw_request { |
| 465 | struct fw_packet response; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 466 | u32 request_header[4]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 467 | int ack; |
| 468 | u32 length; |
| 469 | u32 data[0]; |
| 470 | }; |
| 471 | |
| 472 | static void |
| 473 | free_response_callback(struct fw_packet *packet, |
| 474 | struct fw_card *card, int status) |
| 475 | { |
| 476 | struct fw_request *request; |
| 477 | |
| 478 | request = container_of(packet, struct fw_request, response); |
| 479 | kfree(request); |
| 480 | } |
| 481 | |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 482 | void |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 483 | fw_fill_response(struct fw_packet *response, u32 *request_header, |
| 484 | int rcode, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 485 | { |
| 486 | int tcode, tlabel, extended_tcode, source, destination; |
| 487 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 488 | tcode = HEADER_GET_TCODE(request_header[0]); |
| 489 | tlabel = HEADER_GET_TLABEL(request_header[0]); |
| 490 | source = HEADER_GET_DESTINATION(request_header[0]); |
| 491 | destination = HEADER_GET_SOURCE(request_header[1]); |
| 492 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 493 | |
| 494 | response->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 495 | HEADER_RETRY(RETRY_1) | |
| 496 | HEADER_TLABEL(tlabel) | |
| 497 | HEADER_DESTINATION(destination); |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 498 | response->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 499 | HEADER_SOURCE(source) | |
| 500 | HEADER_RCODE(rcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 501 | response->header[2] = 0; |
| 502 | |
| 503 | switch (tcode) { |
| 504 | case TCODE_WRITE_QUADLET_REQUEST: |
| 505 | case TCODE_WRITE_BLOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 506 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 507 | response->header_length = 12; |
| 508 | response->payload_length = 0; |
| 509 | break; |
| 510 | |
| 511 | case TCODE_READ_QUADLET_REQUEST: |
| 512 | response->header[0] |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 513 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 514 | if (payload != NULL) |
| 515 | response->header[3] = *(u32 *)payload; |
| 516 | else |
| 517 | response->header[3] = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 518 | response->header_length = 16; |
| 519 | response->payload_length = 0; |
| 520 | break; |
| 521 | |
| 522 | case TCODE_READ_BLOCK_REQUEST: |
| 523 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 524 | response->header[0] |= HEADER_TCODE(tcode + 2); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 525 | response->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 526 | HEADER_DATA_LENGTH(length) | |
| 527 | HEADER_EXTENDED_TCODE(extended_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 528 | response->header_length = 16; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 529 | response->payload = payload; |
| 530 | response->payload_length = length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 531 | break; |
| 532 | |
| 533 | default: |
| 534 | BUG(); |
| 535 | return; |
| 536 | } |
| 537 | } |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 538 | EXPORT_SYMBOL(fw_fill_response); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 539 | |
| 540 | static struct fw_request * |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 541 | allocate_request(struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 542 | { |
| 543 | struct fw_request *request; |
| 544 | u32 *data, length; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 545 | int request_tcode, t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 546 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 547 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 548 | switch (request_tcode) { |
| 549 | case TCODE_WRITE_QUADLET_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 550 | data = &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 551 | length = 4; |
| 552 | break; |
| 553 | |
| 554 | case TCODE_WRITE_BLOCK_REQUEST: |
| 555 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 556 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 557 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 558 | break; |
| 559 | |
| 560 | case TCODE_READ_QUADLET_REQUEST: |
| 561 | data = NULL; |
| 562 | length = 4; |
| 563 | break; |
| 564 | |
| 565 | case TCODE_READ_BLOCK_REQUEST: |
| 566 | data = NULL; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 567 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 568 | break; |
| 569 | |
| 570 | default: |
| 571 | BUG(); |
| 572 | return NULL; |
| 573 | } |
| 574 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 575 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 576 | if (request == NULL) |
| 577 | return NULL; |
| 578 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 579 | t = (p->timestamp & 0x1fff) + 4000; |
| 580 | if (t >= 8000) |
| 581 | t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000; |
| 582 | else |
| 583 | t = (p->timestamp & ~0x1fff) + t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 584 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 585 | request->response.speed = p->speed; |
| 586 | request->response.timestamp = t; |
| 587 | request->response.generation = p->generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 588 | request->response.ack = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 589 | request->response.callback = free_response_callback; |
| 590 | request->ack = p->ack; |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 591 | request->length = length; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 592 | if (data) |
Kristian Høgsberg | 6e2e842 | 2007-02-16 17:34:37 -0500 | [diff] [blame] | 593 | memcpy(request->data, data, length); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 594 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 595 | memcpy(request->request_header, p->header, sizeof(p->header)); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 596 | |
| 597 | return request; |
| 598 | } |
| 599 | |
| 600 | void |
| 601 | fw_send_response(struct fw_card *card, struct fw_request *request, int rcode) |
| 602 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 603 | /* |
| 604 | * Broadcast packets are reported as ACK_COMPLETE, so this |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 605 | * check is sufficient to ensure we don't send response to |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 606 | * broadcast packets or posted writes. |
| 607 | */ |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 608 | if (request->ack != ACK_PENDING) { |
| 609 | kfree(request); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 610 | return; |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 611 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 612 | |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 613 | if (rcode == RCODE_COMPLETE) |
| 614 | fw_fill_response(&request->response, request->request_header, |
| 615 | rcode, request->data, request->length); |
| 616 | else |
| 617 | fw_fill_response(&request->response, request->request_header, |
| 618 | rcode, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 619 | |
| 620 | card->driver->send_response(card, &request->response); |
| 621 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 622 | EXPORT_SYMBOL(fw_send_response); |
| 623 | |
| 624 | void |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 625 | fw_core_handle_request(struct fw_card *card, struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 626 | { |
| 627 | struct fw_address_handler *handler; |
| 628 | struct fw_request *request; |
| 629 | unsigned long long offset; |
| 630 | unsigned long flags; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 631 | int tcode, destination, source; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 632 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 633 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 634 | return; |
| 635 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 636 | request = allocate_request(p); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 637 | if (request == NULL) { |
| 638 | /* FIXME: send statically allocated busy packet. */ |
| 639 | return; |
| 640 | } |
| 641 | |
| 642 | offset = |
| 643 | ((unsigned long long) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 644 | HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2]; |
| 645 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 646 | destination = HEADER_GET_DESTINATION(p->header[0]); |
| 647 | source = HEADER_GET_SOURCE(p->header[0]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 648 | |
| 649 | spin_lock_irqsave(&address_handler_lock, flags); |
| 650 | handler = lookup_enclosing_address_handler(&address_handler_list, |
| 651 | offset, request->length); |
| 652 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 653 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 654 | /* |
| 655 | * FIXME: lookup the fw_node corresponding to the sender of |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 656 | * this request and pass that to the address handler instead |
| 657 | * of the node ID. We may also want to move the address |
| 658 | * allocations to fw_node so we only do this callback if the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 659 | * upper layers registered it for this node. |
| 660 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 661 | |
| 662 | if (handler == NULL) |
| 663 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 664 | else |
| 665 | handler->address_callback(card, request, |
| 666 | tcode, destination, source, |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 667 | p->generation, p->speed, offset, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 668 | request->data, request->length, |
| 669 | handler->callback_data); |
| 670 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 671 | EXPORT_SYMBOL(fw_core_handle_request); |
| 672 | |
| 673 | void |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 674 | fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 675 | { |
| 676 | struct fw_transaction *t; |
| 677 | unsigned long flags; |
| 678 | u32 *data; |
| 679 | size_t data_length; |
| 680 | int tcode, tlabel, destination, source, rcode; |
| 681 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 682 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 683 | tlabel = HEADER_GET_TLABEL(p->header[0]); |
| 684 | destination = HEADER_GET_DESTINATION(p->header[0]); |
| 685 | source = HEADER_GET_SOURCE(p->header[1]); |
| 686 | rcode = HEADER_GET_RCODE(p->header[1]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 687 | |
| 688 | spin_lock_irqsave(&card->lock, flags); |
| 689 | list_for_each_entry(t, &card->transaction_list, link) { |
| 690 | if (t->node_id == source && t->tlabel == tlabel) { |
| 691 | list_del(&t->link); |
| 692 | card->tlabel_mask &= ~(1 << t->tlabel); |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | spin_unlock_irqrestore(&card->lock, flags); |
| 697 | |
| 698 | if (&t->link == &card->transaction_list) { |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 699 | fw_notify("Unsolicited response (source %x, tlabel %x)\n", |
| 700 | source, tlabel); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 701 | return; |
| 702 | } |
| 703 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 704 | /* |
| 705 | * FIXME: sanity check packet, is length correct, does tcodes |
| 706 | * and addresses match. |
| 707 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 708 | |
| 709 | switch (tcode) { |
| 710 | case TCODE_READ_QUADLET_RESPONSE: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 711 | data = (u32 *) &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 712 | data_length = 4; |
| 713 | break; |
| 714 | |
| 715 | case TCODE_WRITE_RESPONSE: |
| 716 | data = NULL; |
| 717 | data_length = 0; |
| 718 | break; |
| 719 | |
| 720 | case TCODE_READ_BLOCK_RESPONSE: |
| 721 | case TCODE_LOCK_RESPONSE: |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 722 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 723 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 724 | break; |
| 725 | |
| 726 | default: |
| 727 | /* Should never happen, this is just to shut up gcc. */ |
| 728 | data = NULL; |
| 729 | data_length = 0; |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | t->callback(card, rcode, data, data_length, t->callback_data); |
| 734 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 735 | EXPORT_SYMBOL(fw_core_handle_response); |
| 736 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 737 | static const struct fw_address_region topology_map_region = |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 738 | { .start = 0xfffff0001000ull, .end = 0xfffff0001400ull, }; |
| 739 | |
| 740 | static void |
| 741 | handle_topology_map(struct fw_card *card, struct fw_request *request, |
| 742 | int tcode, int destination, int source, |
| 743 | int generation, int speed, |
| 744 | unsigned long long offset, |
| 745 | void *payload, size_t length, void *callback_data) |
| 746 | { |
| 747 | int i, start, end; |
| 748 | u32 *map; |
| 749 | |
| 750 | if (!TCODE_IS_READ_REQUEST(tcode)) { |
| 751 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 752 | return; |
| 753 | } |
| 754 | |
| 755 | if ((offset & 3) > 0 || (length & 3) > 0) { |
| 756 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 757 | return; |
| 758 | } |
| 759 | |
| 760 | start = (offset - topology_map_region.start) / 4; |
| 761 | end = start + length / 4; |
| 762 | map = payload; |
| 763 | |
| 764 | for (i = 0; i < length / 4; i++) |
| 765 | map[i] = cpu_to_be32(card->topology_map[start + i]); |
| 766 | |
| 767 | fw_send_response(card, request, RCODE_COMPLETE); |
| 768 | } |
| 769 | |
| 770 | static struct fw_address_handler topology_map = { |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 771 | .length = 0x200, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 772 | .address_callback = handle_topology_map, |
| 773 | }; |
| 774 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 775 | static const struct fw_address_region registers_region = |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 776 | { .start = 0xfffff0000000ull, .end = 0xfffff0000400ull, }; |
| 777 | |
| 778 | static void |
| 779 | handle_registers(struct fw_card *card, struct fw_request *request, |
| 780 | int tcode, int destination, int source, |
| 781 | int generation, int speed, |
| 782 | unsigned long long offset, |
| 783 | void *payload, size_t length, void *callback_data) |
| 784 | { |
| 785 | int reg = offset - CSR_REGISTER_BASE; |
| 786 | unsigned long long bus_time; |
| 787 | __be32 *data = payload; |
| 788 | |
| 789 | switch (reg) { |
| 790 | case CSR_CYCLE_TIME: |
| 791 | case CSR_BUS_TIME: |
| 792 | if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) { |
| 793 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 794 | break; |
| 795 | } |
| 796 | |
| 797 | bus_time = card->driver->get_bus_time(card); |
| 798 | if (reg == CSR_CYCLE_TIME) |
| 799 | *data = cpu_to_be32(bus_time); |
| 800 | else |
| 801 | *data = cpu_to_be32(bus_time >> 25); |
| 802 | fw_send_response(card, request, RCODE_COMPLETE); |
| 803 | break; |
| 804 | |
| 805 | case CSR_BUS_MANAGER_ID: |
| 806 | case CSR_BANDWIDTH_AVAILABLE: |
| 807 | case CSR_CHANNELS_AVAILABLE_HI: |
| 808 | case CSR_CHANNELS_AVAILABLE_LO: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 809 | /* |
| 810 | * FIXME: these are handled by the OHCI hardware and |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 811 | * the stack never sees these request. If we add |
| 812 | * support for a new type of controller that doesn't |
| 813 | * handle this in hardware we need to deal with these |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 814 | * transactions. |
| 815 | */ |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 816 | BUG(); |
| 817 | break; |
| 818 | |
| 819 | case CSR_BUSY_TIMEOUT: |
| 820 | /* FIXME: Implement this. */ |
| 821 | default: |
| 822 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 823 | break; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | static struct fw_address_handler registers = { |
| 828 | .length = 0x400, |
| 829 | .address_callback = handle_registers, |
| 830 | }; |
| 831 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 832 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 833 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); |
| 834 | MODULE_LICENSE("GPL"); |
| 835 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 836 | static const u32 vendor_textual_descriptor[] = { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 837 | /* textual descriptor leaf () */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 838 | 0x00060000, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 839 | 0x00000000, |
| 840 | 0x00000000, |
| 841 | 0x4c696e75, /* L i n u */ |
| 842 | 0x78204669, /* x F i */ |
| 843 | 0x72657769, /* r e w i */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 844 | 0x72650000, /* r e */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 845 | }; |
| 846 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 847 | static const u32 model_textual_descriptor[] = { |
| 848 | /* model descriptor leaf () */ |
| 849 | 0x00030000, |
| 850 | 0x00000000, |
| 851 | 0x00000000, |
| 852 | 0x4a756a75, /* J u j u */ |
| 853 | }; |
| 854 | |
| 855 | static struct fw_descriptor vendor_id_descriptor = { |
| 856 | .length = ARRAY_SIZE(vendor_textual_descriptor), |
| 857 | .immediate = 0x03d00d1e, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 858 | .key = 0x81000000, |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 859 | .data = vendor_textual_descriptor, |
| 860 | }; |
| 861 | |
| 862 | static struct fw_descriptor model_id_descriptor = { |
| 863 | .length = ARRAY_SIZE(model_textual_descriptor), |
| 864 | .immediate = 0x17000001, |
| 865 | .key = 0x81000000, |
| 866 | .data = model_textual_descriptor, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 867 | }; |
| 868 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 869 | static int __init fw_core_init(void) |
| 870 | { |
| 871 | int retval; |
| 872 | |
| 873 | retval = bus_register(&fw_bus_type); |
| 874 | if (retval < 0) |
| 875 | return retval; |
| 876 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 877 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
| 878 | if (fw_cdev_major < 0) { |
| 879 | bus_unregister(&fw_bus_type); |
| 880 | return fw_cdev_major; |
| 881 | } |
| 882 | |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 883 | retval = fw_core_add_address_handler(&topology_map, |
| 884 | &topology_map_region); |
| 885 | BUG_ON(retval < 0); |
| 886 | |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 887 | retval = fw_core_add_address_handler(®isters, |
| 888 | ®isters_region); |
| 889 | BUG_ON(retval < 0); |
| 890 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 891 | /* Add the vendor textual descriptor. */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 892 | retval = fw_core_add_descriptor(&vendor_id_descriptor); |
| 893 | BUG_ON(retval < 0); |
| 894 | retval = fw_core_add_descriptor(&model_id_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 895 | BUG_ON(retval < 0); |
| 896 | |
| 897 | return 0; |
| 898 | } |
| 899 | |
| 900 | static void __exit fw_core_cleanup(void) |
| 901 | { |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 902 | unregister_chrdev(fw_cdev_major, "firewire"); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 903 | bus_unregister(&fw_bus_type); |
| 904 | } |
| 905 | |
| 906 | module_init(fw_core_init); |
| 907 | module_exit(fw_core_cleanup); |