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 | |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 21 | #include <linux/completion.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 22 | #include <linux/kernel.h> |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 23 | #include <linux/kref.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/delay.h> |
| 29 | #include <linux/poll.h> |
| 30 | #include <linux/list.h> |
| 31 | #include <linux/kthread.h> |
| 32 | #include <asm/uaccess.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 33 | |
| 34 | #include "fw-transaction.h" |
| 35 | #include "fw-topology.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 36 | #include "fw-device.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 37 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 38 | #define HEADER_PRI(pri) ((pri) << 0) |
| 39 | #define HEADER_TCODE(tcode) ((tcode) << 4) |
| 40 | #define HEADER_RETRY(retry) ((retry) << 8) |
| 41 | #define HEADER_TLABEL(tlabel) ((tlabel) << 10) |
| 42 | #define HEADER_DESTINATION(destination) ((destination) << 16) |
| 43 | #define HEADER_SOURCE(source) ((source) << 16) |
| 44 | #define HEADER_RCODE(rcode) ((rcode) << 12) |
| 45 | #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) |
| 46 | #define HEADER_DATA_LENGTH(length) ((length) << 16) |
| 47 | #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 48 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 49 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) |
| 50 | #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) |
| 51 | #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) |
| 52 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
| 53 | #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) |
| 54 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) |
| 55 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) |
| 56 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 57 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 58 | #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) |
| 59 | #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) |
| 60 | #define PHY_IDENTIFIER(id) ((id) << 30) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 61 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 62 | static int |
| 63 | close_transaction(struct fw_transaction *transaction, |
| 64 | struct fw_card *card, int rcode, |
| 65 | u32 *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 66 | { |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 67 | struct fw_transaction *t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 68 | unsigned long flags; |
| 69 | |
| 70 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 71 | list_for_each_entry(t, &card->transaction_list, link) { |
| 72 | if (t == transaction) { |
| 73 | list_del(&t->link); |
| 74 | card->tlabel_mask &= ~(1 << t->tlabel); |
| 75 | break; |
| 76 | } |
| 77 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 78 | spin_unlock_irqrestore(&card->lock, flags); |
| 79 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 80 | if (&t->link != &card->transaction_list) { |
| 81 | t->callback(card, rcode, payload, length, t->callback_data); |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | return -ENOENT; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 86 | } |
| 87 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 88 | /* |
| 89 | * Only valid for transactions that are potentially pending (ie have |
| 90 | * been sent). |
| 91 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 92 | int |
| 93 | fw_cancel_transaction(struct fw_card *card, |
| 94 | struct fw_transaction *transaction) |
| 95 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 96 | /* |
| 97 | * Cancel the packet transmission if it's still queued. That |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 98 | * will call the packet transmission callback which cancels |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 99 | * the transaction. |
| 100 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 101 | |
| 102 | if (card->driver->cancel_packet(card, &transaction->packet) == 0) |
| 103 | return 0; |
| 104 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 105 | /* |
| 106 | * If the request packet has already been sent, we need to see |
| 107 | * if the transaction is still pending and remove it in that case. |
| 108 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 109 | |
| 110 | return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0); |
| 111 | } |
| 112 | EXPORT_SYMBOL(fw_cancel_transaction); |
| 113 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 114 | static void |
| 115 | transmit_complete_callback(struct fw_packet *packet, |
| 116 | struct fw_card *card, int status) |
| 117 | { |
| 118 | struct fw_transaction *t = |
| 119 | container_of(packet, struct fw_transaction, packet); |
| 120 | |
| 121 | switch (status) { |
| 122 | case ACK_COMPLETE: |
| 123 | close_transaction(t, card, RCODE_COMPLETE, NULL, 0); |
| 124 | break; |
| 125 | case ACK_PENDING: |
| 126 | t->timestamp = packet->timestamp; |
| 127 | break; |
| 128 | case ACK_BUSY_X: |
| 129 | case ACK_BUSY_A: |
| 130 | case ACK_BUSY_B: |
| 131 | close_transaction(t, card, RCODE_BUSY, NULL, 0); |
| 132 | break; |
| 133 | case ACK_DATA_ERROR: |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 134 | close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0); |
| 135 | break; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 136 | case ACK_TYPE_ERROR: |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 137 | close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 138 | break; |
| 139 | default: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 140 | /* |
| 141 | * In this case the ack is really a juju specific |
| 142 | * rcode, so just forward that to the callback. |
| 143 | */ |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 144 | close_transaction(t, card, status, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 145 | break; |
| 146 | } |
| 147 | } |
| 148 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 149 | static void |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 150 | fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 151 | int node_id, int source_id, int generation, int speed, |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 152 | unsigned long long offset, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 153 | { |
| 154 | int ext_tcode; |
| 155 | |
| 156 | if (tcode > 0x10) { |
Jarod Wilson | 8f9f963 | 2008-01-23 16:05:45 -0500 | [diff] [blame] | 157 | ext_tcode = tcode & ~0x10; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 158 | tcode = TCODE_LOCK_REQUEST; |
| 159 | } else |
| 160 | ext_tcode = 0; |
| 161 | |
| 162 | packet->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 163 | HEADER_RETRY(RETRY_X) | |
| 164 | HEADER_TLABEL(tlabel) | |
| 165 | HEADER_TCODE(tcode) | |
| 166 | HEADER_DESTINATION(node_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 167 | packet->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 168 | HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 169 | packet->header[2] = |
| 170 | offset; |
| 171 | |
| 172 | switch (tcode) { |
| 173 | case TCODE_WRITE_QUADLET_REQUEST: |
| 174 | packet->header[3] = *(u32 *)payload; |
| 175 | packet->header_length = 16; |
| 176 | packet->payload_length = 0; |
| 177 | break; |
| 178 | |
| 179 | case TCODE_LOCK_REQUEST: |
| 180 | case TCODE_WRITE_BLOCK_REQUEST: |
| 181 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 182 | HEADER_DATA_LENGTH(length) | |
| 183 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 184 | packet->header_length = 16; |
| 185 | packet->payload = payload; |
| 186 | packet->payload_length = length; |
| 187 | break; |
| 188 | |
| 189 | case TCODE_READ_QUADLET_REQUEST: |
| 190 | packet->header_length = 12; |
| 191 | packet->payload_length = 0; |
| 192 | break; |
| 193 | |
| 194 | case TCODE_READ_BLOCK_REQUEST: |
| 195 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 196 | HEADER_DATA_LENGTH(length) | |
| 197 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 198 | packet->header_length = 16; |
| 199 | packet->payload_length = 0; |
| 200 | break; |
| 201 | } |
| 202 | |
| 203 | packet->speed = speed; |
| 204 | packet->generation = generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 205 | packet->ack = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /** |
| 209 | * This function provides low-level access to the IEEE1394 transaction |
| 210 | * logic. Most C programs would use either fw_read(), fw_write() or |
| 211 | * fw_lock() instead - those function are convenience wrappers for |
| 212 | * this function. The fw_send_request() function is primarily |
| 213 | * provided as a flexible, one-stop entry point for languages bindings |
| 214 | * and protocol bindings. |
| 215 | * |
| 216 | * FIXME: Document this function further, in particular the possible |
| 217 | * values for rcode in the callback. In short, we map ACK_COMPLETE to |
| 218 | * RCODE_COMPLETE, internal errors set errno and set rcode to |
| 219 | * RCODE_SEND_ERROR (which is out of range for standard ieee1394 |
| 220 | * rcodes). All other rcodes are forwarded unchanged. For all |
| 221 | * errors, payload is NULL, length is 0. |
| 222 | * |
| 223 | * Can not expect the callback to be called before the function |
| 224 | * returns, though this does happen in some cases (ACK_COMPLETE and |
| 225 | * errors). |
| 226 | * |
| 227 | * The payload is only used for write requests and must not be freed |
| 228 | * until the callback has been called. |
| 229 | * |
| 230 | * @param card the card from which to send the request |
| 231 | * @param tcode the tcode for this transaction. Do not use |
Uwe Kleine-König | dbe7f76 | 2007-10-20 01:55:04 +0200 | [diff] [blame] | 232 | * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 233 | * etc. to specify tcode and ext_tcode. |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 234 | * @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] | 235 | * @param generation the generation for which node_id is valid |
| 236 | * @param speed the speed to use for sending the request |
| 237 | * @param offset the 48 bit offset on the destination node |
| 238 | * @param payload the data payload for the request subaction |
| 239 | * @param length the length in bytes of the data to read |
| 240 | * @param callback function to be called when the transaction is completed |
| 241 | * @param callback_data pointer to arbitrary data, which will be |
| 242 | * passed to the callback |
| 243 | */ |
| 244 | void |
| 245 | fw_send_request(struct fw_card *card, struct fw_transaction *t, |
| 246 | int tcode, int node_id, int generation, int speed, |
| 247 | unsigned long long offset, |
| 248 | void *payload, size_t length, |
| 249 | fw_transaction_callback_t callback, void *callback_data) |
| 250 | { |
| 251 | unsigned long flags; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 252 | int tlabel, source; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 253 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 254 | /* |
| 255 | * Bump the flush timer up 100ms first of all so we |
| 256 | * don't race with a flush timer callback. |
| 257 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 258 | |
| 259 | mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10)); |
| 260 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 261 | /* |
| 262 | * Allocate tlabel from the bitmap and put the transaction on |
| 263 | * the list while holding the card spinlock. |
| 264 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 265 | |
| 266 | spin_lock_irqsave(&card->lock, flags); |
| 267 | |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 268 | source = card->node_id; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 269 | tlabel = card->current_tlabel; |
| 270 | if (card->tlabel_mask & (1 << tlabel)) { |
| 271 | spin_unlock_irqrestore(&card->lock, flags); |
| 272 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | card->current_tlabel = (card->current_tlabel + 1) & 0x1f; |
| 277 | card->tlabel_mask |= (1 << tlabel); |
| 278 | |
| 279 | list_add_tail(&t->link, &card->transaction_list); |
| 280 | |
| 281 | spin_unlock_irqrestore(&card->lock, flags); |
| 282 | |
| 283 | /* Initialize rest of transaction, fill out packet and send it. */ |
| 284 | t->node_id = node_id; |
| 285 | t->tlabel = tlabel; |
| 286 | t->callback = callback; |
| 287 | t->callback_data = callback_data; |
| 288 | |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 289 | fw_fill_request(&t->packet, tcode, t->tlabel, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 290 | node_id, source, generation, |
| 291 | speed, offset, payload, length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 292 | t->packet.callback = transmit_complete_callback; |
| 293 | |
| 294 | card->driver->send_request(card, &t->packet); |
| 295 | } |
| 296 | EXPORT_SYMBOL(fw_send_request); |
| 297 | |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 298 | struct fw_phy_packet { |
| 299 | struct fw_packet packet; |
| 300 | struct completion done; |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 301 | struct kref kref; |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 302 | }; |
| 303 | |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 304 | static void phy_packet_release(struct kref *kref) |
| 305 | { |
| 306 | struct fw_phy_packet *p = |
| 307 | container_of(kref, struct fw_phy_packet, kref); |
| 308 | kfree(p); |
| 309 | } |
| 310 | |
| 311 | static void transmit_phy_packet_callback(struct fw_packet *packet, |
| 312 | struct fw_card *card, int status) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 313 | { |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 314 | struct fw_phy_packet *p = |
| 315 | container_of(packet, struct fw_phy_packet, packet); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 316 | |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 317 | complete(&p->done); |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 318 | kref_put(&p->kref, phy_packet_release); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 319 | } |
| 320 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 321 | void fw_send_phy_config(struct fw_card *card, |
| 322 | int node_id, int generation, int gap_count) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 323 | { |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 324 | struct fw_phy_packet *p; |
| 325 | long timeout = DIV_ROUND_UP(HZ, 10); |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 326 | u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) | |
| 327 | PHY_CONFIG_ROOT_ID(node_id) | |
| 328 | PHY_CONFIG_GAP_COUNT(gap_count); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 329 | |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 330 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
| 331 | if (p == NULL) |
| 332 | return; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 333 | |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 334 | p->packet.header[0] = data; |
| 335 | p->packet.header[1] = ~data; |
| 336 | p->packet.header_length = 8; |
| 337 | p->packet.payload_length = 0; |
| 338 | p->packet.speed = SCODE_100; |
| 339 | p->packet.generation = generation; |
| 340 | p->packet.callback = transmit_phy_packet_callback; |
| 341 | init_completion(&p->done); |
| 342 | kref_set(&p->kref, 2); |
| 343 | |
| 344 | card->driver->send_request(card, &p->packet); |
| 345 | timeout = wait_for_completion_timeout(&p->done, timeout); |
| 346 | kref_put(&p->kref, phy_packet_release); |
| 347 | |
| 348 | /* will leak p if the callback is never executed */ |
| 349 | WARN_ON(timeout == 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | void fw_flush_transactions(struct fw_card *card) |
| 353 | { |
| 354 | struct fw_transaction *t, *next; |
| 355 | struct list_head list; |
| 356 | unsigned long flags; |
| 357 | |
| 358 | INIT_LIST_HEAD(&list); |
| 359 | spin_lock_irqsave(&card->lock, flags); |
| 360 | list_splice_init(&card->transaction_list, &list); |
| 361 | card->tlabel_mask = 0; |
| 362 | spin_unlock_irqrestore(&card->lock, flags); |
| 363 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 364 | list_for_each_entry_safe(t, next, &list, link) { |
| 365 | card->driver->cancel_packet(card, &t->packet); |
| 366 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 367 | /* |
| 368 | * At this point cancel_packet will never call the |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 369 | * transaction callback, since we just took all the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 370 | * transactions out of the list. So do it here. |
| 371 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 372 | t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 373 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | static struct fw_address_handler * |
| 377 | lookup_overlapping_address_handler(struct list_head *list, |
| 378 | unsigned long long offset, size_t length) |
| 379 | { |
| 380 | struct fw_address_handler *handler; |
| 381 | |
| 382 | list_for_each_entry(handler, list, link) { |
| 383 | if (handler->offset < offset + length && |
| 384 | offset < handler->offset + handler->length) |
| 385 | return handler; |
| 386 | } |
| 387 | |
| 388 | return NULL; |
| 389 | } |
| 390 | |
| 391 | static struct fw_address_handler * |
| 392 | lookup_enclosing_address_handler(struct list_head *list, |
| 393 | unsigned long long offset, size_t length) |
| 394 | { |
| 395 | struct fw_address_handler *handler; |
| 396 | |
| 397 | list_for_each_entry(handler, list, link) { |
| 398 | if (handler->offset <= offset && |
| 399 | offset + length <= handler->offset + handler->length) |
| 400 | return handler; |
| 401 | } |
| 402 | |
| 403 | return NULL; |
| 404 | } |
| 405 | |
| 406 | static DEFINE_SPINLOCK(address_handler_lock); |
| 407 | static LIST_HEAD(address_handler_list); |
| 408 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 409 | const struct fw_address_region fw_high_memory_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 410 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
Adrian Bunk | db8be07 | 2008-03-31 02:22:11 +0300 | [diff] [blame] | 411 | EXPORT_SYMBOL(fw_high_memory_region); |
| 412 | |
| 413 | #if 0 |
| 414 | const struct fw_address_region fw_low_memory_region = |
| 415 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 416 | const struct fw_address_region fw_private_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 417 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 418 | const struct fw_address_region fw_csr_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 419 | { .start = CSR_REGISTER_BASE, |
| 420 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 421 | const struct fw_address_region fw_unit_space_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 422 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
Adrian Bunk | db8be07 | 2008-03-31 02:22:11 +0300 | [diff] [blame] | 423 | #endif /* 0 */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 424 | |
| 425 | /** |
| 426 | * Allocate a range of addresses in the node space of the OHCI |
| 427 | * controller. When a request is received that falls within the |
| 428 | * specified address range, the specified callback is invoked. The |
| 429 | * parameters passed to the callback give the details of the |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 430 | * particular request. |
| 431 | * |
| 432 | * Return value: 0 on success, non-zero otherwise. |
| 433 | * The start offset of the handler's address region is determined by |
| 434 | * fw_core_add_address_handler() and is returned in handler->offset. |
| 435 | * The offset is quadlet-aligned. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 436 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 437 | int |
| 438 | fw_core_add_address_handler(struct fw_address_handler *handler, |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 439 | const struct fw_address_region *region) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 440 | { |
| 441 | struct fw_address_handler *other; |
| 442 | unsigned long flags; |
| 443 | int ret = -EBUSY; |
| 444 | |
| 445 | spin_lock_irqsave(&address_handler_lock, flags); |
| 446 | |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 447 | handler->offset = roundup(region->start, 4); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 448 | while (handler->offset + handler->length <= region->end) { |
| 449 | other = |
| 450 | lookup_overlapping_address_handler(&address_handler_list, |
| 451 | handler->offset, |
| 452 | handler->length); |
| 453 | if (other != NULL) { |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 454 | handler->offset = |
| 455 | roundup(other->offset + other->length, 4); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 456 | } else { |
| 457 | list_add_tail(&handler->link, &address_handler_list); |
| 458 | ret = 0; |
| 459 | break; |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 464 | |
| 465 | return ret; |
| 466 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 467 | EXPORT_SYMBOL(fw_core_add_address_handler); |
| 468 | |
| 469 | /** |
| 470 | * Deallocate a range of addresses allocated with fw_allocate. This |
| 471 | * will call the associated callback one last time with a the special |
| 472 | * tcode TCODE_DEALLOCATE, to let the client destroy the registered |
| 473 | * callback data. For convenience, the callback parameters offset and |
| 474 | * length are set to the start and the length respectively for the |
| 475 | * deallocated region, payload is set to NULL. |
| 476 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 477 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
| 478 | { |
| 479 | unsigned long flags; |
| 480 | |
| 481 | spin_lock_irqsave(&address_handler_lock, flags); |
| 482 | list_del(&handler->link); |
| 483 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 484 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 485 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
| 486 | |
| 487 | struct fw_request { |
| 488 | struct fw_packet response; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 489 | u32 request_header[4]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 490 | int ack; |
| 491 | u32 length; |
| 492 | u32 data[0]; |
| 493 | }; |
| 494 | |
| 495 | static void |
| 496 | free_response_callback(struct fw_packet *packet, |
| 497 | struct fw_card *card, int status) |
| 498 | { |
| 499 | struct fw_request *request; |
| 500 | |
| 501 | request = container_of(packet, struct fw_request, response); |
| 502 | kfree(request); |
| 503 | } |
| 504 | |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 505 | void |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 506 | fw_fill_response(struct fw_packet *response, u32 *request_header, |
| 507 | int rcode, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 508 | { |
| 509 | int tcode, tlabel, extended_tcode, source, destination; |
| 510 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 511 | tcode = HEADER_GET_TCODE(request_header[0]); |
| 512 | tlabel = HEADER_GET_TLABEL(request_header[0]); |
| 513 | source = HEADER_GET_DESTINATION(request_header[0]); |
| 514 | destination = HEADER_GET_SOURCE(request_header[1]); |
| 515 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 516 | |
| 517 | response->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 518 | HEADER_RETRY(RETRY_1) | |
| 519 | HEADER_TLABEL(tlabel) | |
| 520 | HEADER_DESTINATION(destination); |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 521 | response->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 522 | HEADER_SOURCE(source) | |
| 523 | HEADER_RCODE(rcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 524 | response->header[2] = 0; |
| 525 | |
| 526 | switch (tcode) { |
| 527 | case TCODE_WRITE_QUADLET_REQUEST: |
| 528 | case TCODE_WRITE_BLOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 529 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 530 | response->header_length = 12; |
| 531 | response->payload_length = 0; |
| 532 | break; |
| 533 | |
| 534 | case TCODE_READ_QUADLET_REQUEST: |
| 535 | response->header[0] |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 536 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 537 | if (payload != NULL) |
| 538 | response->header[3] = *(u32 *)payload; |
| 539 | else |
| 540 | response->header[3] = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 541 | response->header_length = 16; |
| 542 | response->payload_length = 0; |
| 543 | break; |
| 544 | |
| 545 | case TCODE_READ_BLOCK_REQUEST: |
| 546 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 547 | response->header[0] |= HEADER_TCODE(tcode + 2); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 548 | response->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 549 | HEADER_DATA_LENGTH(length) | |
| 550 | HEADER_EXTENDED_TCODE(extended_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 551 | response->header_length = 16; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 552 | response->payload = payload; |
| 553 | response->payload_length = length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 554 | break; |
| 555 | |
| 556 | default: |
| 557 | BUG(); |
| 558 | return; |
| 559 | } |
| 560 | } |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 561 | EXPORT_SYMBOL(fw_fill_response); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 562 | |
| 563 | static struct fw_request * |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 564 | allocate_request(struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 565 | { |
| 566 | struct fw_request *request; |
| 567 | u32 *data, length; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 568 | int request_tcode, t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 569 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 570 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 571 | switch (request_tcode) { |
| 572 | case TCODE_WRITE_QUADLET_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 573 | data = &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 574 | length = 4; |
| 575 | break; |
| 576 | |
| 577 | case TCODE_WRITE_BLOCK_REQUEST: |
| 578 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 579 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 580 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 581 | break; |
| 582 | |
| 583 | case TCODE_READ_QUADLET_REQUEST: |
| 584 | data = NULL; |
| 585 | length = 4; |
| 586 | break; |
| 587 | |
| 588 | case TCODE_READ_BLOCK_REQUEST: |
| 589 | data = NULL; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 590 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 591 | break; |
| 592 | |
| 593 | default: |
Stefan Richter | 0bf607c | 2008-05-31 19:01:26 +0200 | [diff] [blame] | 594 | fw_error("ERROR - corrupt request received - %08x %08x %08x\n", |
| 595 | p->header[0], p->header[1], p->header[2]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 596 | return NULL; |
| 597 | } |
| 598 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 599 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 600 | if (request == NULL) |
| 601 | return NULL; |
| 602 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 603 | t = (p->timestamp & 0x1fff) + 4000; |
| 604 | if (t >= 8000) |
| 605 | t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000; |
| 606 | else |
| 607 | t = (p->timestamp & ~0x1fff) + t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 608 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 609 | request->response.speed = p->speed; |
| 610 | request->response.timestamp = t; |
| 611 | request->response.generation = p->generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 612 | request->response.ack = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 613 | request->response.callback = free_response_callback; |
| 614 | request->ack = p->ack; |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 615 | request->length = length; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 616 | if (data) |
Kristian Høgsberg | 6e2e842 | 2007-02-16 17:34:37 -0500 | [diff] [blame] | 617 | memcpy(request->data, data, length); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 618 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 619 | memcpy(request->request_header, p->header, sizeof(p->header)); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 620 | |
| 621 | return request; |
| 622 | } |
| 623 | |
| 624 | void |
| 625 | fw_send_response(struct fw_card *card, struct fw_request *request, int rcode) |
| 626 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 627 | /* |
| 628 | * Broadcast packets are reported as ACK_COMPLETE, so this |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 629 | * check is sufficient to ensure we don't send response to |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 630 | * broadcast packets or posted writes. |
| 631 | */ |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 632 | if (request->ack != ACK_PENDING) { |
| 633 | kfree(request); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 634 | return; |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 635 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 636 | |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 637 | if (rcode == RCODE_COMPLETE) |
| 638 | fw_fill_response(&request->response, request->request_header, |
| 639 | rcode, request->data, request->length); |
| 640 | else |
| 641 | fw_fill_response(&request->response, request->request_header, |
| 642 | rcode, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 643 | |
| 644 | card->driver->send_response(card, &request->response); |
| 645 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 646 | EXPORT_SYMBOL(fw_send_response); |
| 647 | |
| 648 | void |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 649 | fw_core_handle_request(struct fw_card *card, struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 650 | { |
| 651 | struct fw_address_handler *handler; |
| 652 | struct fw_request *request; |
| 653 | unsigned long long offset; |
| 654 | unsigned long flags; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 655 | int tcode, destination, source; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 656 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 657 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 658 | return; |
| 659 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 660 | request = allocate_request(p); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 661 | if (request == NULL) { |
| 662 | /* FIXME: send statically allocated busy packet. */ |
| 663 | return; |
| 664 | } |
| 665 | |
| 666 | offset = |
| 667 | ((unsigned long long) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 668 | HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2]; |
| 669 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 670 | destination = HEADER_GET_DESTINATION(p->header[0]); |
Rabin Vincent | 478b233 | 2007-12-21 23:02:15 +0530 | [diff] [blame] | 671 | source = HEADER_GET_SOURCE(p->header[1]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 672 | |
| 673 | spin_lock_irqsave(&address_handler_lock, flags); |
| 674 | handler = lookup_enclosing_address_handler(&address_handler_list, |
| 675 | offset, request->length); |
| 676 | spin_unlock_irqrestore(&address_handler_lock, flags); |
| 677 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 678 | /* |
| 679 | * FIXME: lookup the fw_node corresponding to the sender of |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 680 | * this request and pass that to the address handler instead |
| 681 | * of the node ID. We may also want to move the address |
| 682 | * allocations to fw_node so we only do this callback if the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 683 | * upper layers registered it for this node. |
| 684 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 685 | |
| 686 | if (handler == NULL) |
| 687 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 688 | else |
| 689 | handler->address_callback(card, request, |
| 690 | tcode, destination, source, |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 691 | p->generation, p->speed, offset, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 692 | request->data, request->length, |
| 693 | handler->callback_data); |
| 694 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 695 | EXPORT_SYMBOL(fw_core_handle_request); |
| 696 | |
| 697 | void |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 698 | fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 699 | { |
| 700 | struct fw_transaction *t; |
| 701 | unsigned long flags; |
| 702 | u32 *data; |
| 703 | size_t data_length; |
| 704 | int tcode, tlabel, destination, source, rcode; |
| 705 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 706 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 707 | tlabel = HEADER_GET_TLABEL(p->header[0]); |
| 708 | destination = HEADER_GET_DESTINATION(p->header[0]); |
| 709 | source = HEADER_GET_SOURCE(p->header[1]); |
| 710 | rcode = HEADER_GET_RCODE(p->header[1]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 711 | |
| 712 | spin_lock_irqsave(&card->lock, flags); |
| 713 | list_for_each_entry(t, &card->transaction_list, link) { |
| 714 | if (t->node_id == source && t->tlabel == tlabel) { |
| 715 | list_del(&t->link); |
| 716 | card->tlabel_mask &= ~(1 << t->tlabel); |
| 717 | break; |
| 718 | } |
| 719 | } |
| 720 | spin_unlock_irqrestore(&card->lock, flags); |
| 721 | |
| 722 | if (&t->link == &card->transaction_list) { |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 723 | fw_notify("Unsolicited response (source %x, tlabel %x)\n", |
| 724 | source, tlabel); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 725 | return; |
| 726 | } |
| 727 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 728 | /* |
| 729 | * FIXME: sanity check packet, is length correct, does tcodes |
| 730 | * and addresses match. |
| 731 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 732 | |
| 733 | switch (tcode) { |
| 734 | case TCODE_READ_QUADLET_RESPONSE: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 735 | data = (u32 *) &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 736 | data_length = 4; |
| 737 | break; |
| 738 | |
| 739 | case TCODE_WRITE_RESPONSE: |
| 740 | data = NULL; |
| 741 | data_length = 0; |
| 742 | break; |
| 743 | |
| 744 | case TCODE_READ_BLOCK_RESPONSE: |
| 745 | case TCODE_LOCK_RESPONSE: |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 746 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 747 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 748 | break; |
| 749 | |
| 750 | default: |
| 751 | /* Should never happen, this is just to shut up gcc. */ |
| 752 | data = NULL; |
| 753 | data_length = 0; |
| 754 | break; |
| 755 | } |
| 756 | |
Stefan Richter | 10a4c73 | 2008-03-16 00:56:41 +0100 | [diff] [blame] | 757 | /* |
| 758 | * The response handler may be executed while the request handler |
| 759 | * is still pending. Cancel the request handler. |
| 760 | */ |
| 761 | card->driver->cancel_packet(card, &t->packet); |
| 762 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 763 | t->callback(card, rcode, data, data_length, t->callback_data); |
| 764 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 765 | EXPORT_SYMBOL(fw_core_handle_response); |
| 766 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 767 | static const struct fw_address_region topology_map_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 768 | { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, |
| 769 | .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 770 | |
| 771 | static void |
| 772 | handle_topology_map(struct fw_card *card, struct fw_request *request, |
| 773 | int tcode, int destination, int source, |
| 774 | int generation, int speed, |
| 775 | unsigned long long offset, |
| 776 | void *payload, size_t length, void *callback_data) |
| 777 | { |
| 778 | int i, start, end; |
Stefan Richter | efbf390 | 2008-02-23 12:24:57 +0100 | [diff] [blame] | 779 | __be32 *map; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 780 | |
| 781 | if (!TCODE_IS_READ_REQUEST(tcode)) { |
| 782 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 783 | return; |
| 784 | } |
| 785 | |
| 786 | if ((offset & 3) > 0 || (length & 3) > 0) { |
| 787 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 788 | return; |
| 789 | } |
| 790 | |
| 791 | start = (offset - topology_map_region.start) / 4; |
| 792 | end = start + length / 4; |
| 793 | map = payload; |
| 794 | |
| 795 | for (i = 0; i < length / 4; i++) |
| 796 | map[i] = cpu_to_be32(card->topology_map[start + i]); |
| 797 | |
| 798 | fw_send_response(card, request, RCODE_COMPLETE); |
| 799 | } |
| 800 | |
| 801 | static struct fw_address_handler topology_map = { |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 802 | .length = 0x200, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 803 | .address_callback = handle_topology_map, |
| 804 | }; |
| 805 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 806 | static const struct fw_address_region registers_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 807 | { .start = CSR_REGISTER_BASE, |
| 808 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 809 | |
| 810 | static void |
| 811 | handle_registers(struct fw_card *card, struct fw_request *request, |
| 812 | int tcode, int destination, int source, |
| 813 | int generation, int speed, |
| 814 | unsigned long long offset, |
| 815 | void *payload, size_t length, void *callback_data) |
| 816 | { |
Jarod Wilson | 15f0d83 | 2008-03-08 13:18:58 -0500 | [diff] [blame] | 817 | int reg = offset & ~CSR_REGISTER_BASE; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 818 | unsigned long long bus_time; |
| 819 | __be32 *data = payload; |
| 820 | |
| 821 | switch (reg) { |
| 822 | case CSR_CYCLE_TIME: |
| 823 | case CSR_BUS_TIME: |
| 824 | if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) { |
| 825 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 826 | break; |
| 827 | } |
| 828 | |
| 829 | bus_time = card->driver->get_bus_time(card); |
| 830 | if (reg == CSR_CYCLE_TIME) |
| 831 | *data = cpu_to_be32(bus_time); |
| 832 | else |
| 833 | *data = cpu_to_be32(bus_time >> 25); |
| 834 | fw_send_response(card, request, RCODE_COMPLETE); |
| 835 | break; |
| 836 | |
| 837 | case CSR_BUS_MANAGER_ID: |
| 838 | case CSR_BANDWIDTH_AVAILABLE: |
| 839 | case CSR_CHANNELS_AVAILABLE_HI: |
| 840 | case CSR_CHANNELS_AVAILABLE_LO: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 841 | /* |
| 842 | * FIXME: these are handled by the OHCI hardware and |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 843 | * the stack never sees these request. If we add |
| 844 | * support for a new type of controller that doesn't |
| 845 | * handle this in hardware we need to deal with these |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 846 | * transactions. |
| 847 | */ |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 848 | BUG(); |
| 849 | break; |
| 850 | |
| 851 | case CSR_BUSY_TIMEOUT: |
| 852 | /* FIXME: Implement this. */ |
| 853 | default: |
| 854 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 855 | break; |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | static struct fw_address_handler registers = { |
| 860 | .length = 0x400, |
| 861 | .address_callback = handle_registers, |
| 862 | }; |
| 863 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 864 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 865 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); |
| 866 | MODULE_LICENSE("GPL"); |
| 867 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 868 | static const u32 vendor_textual_descriptor[] = { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 869 | /* textual descriptor leaf () */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 870 | 0x00060000, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 871 | 0x00000000, |
| 872 | 0x00000000, |
| 873 | 0x4c696e75, /* L i n u */ |
| 874 | 0x78204669, /* x F i */ |
| 875 | 0x72657769, /* r e w i */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 876 | 0x72650000, /* r e */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 877 | }; |
| 878 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 879 | static const u32 model_textual_descriptor[] = { |
| 880 | /* model descriptor leaf () */ |
| 881 | 0x00030000, |
| 882 | 0x00000000, |
| 883 | 0x00000000, |
| 884 | 0x4a756a75, /* J u j u */ |
| 885 | }; |
| 886 | |
| 887 | static struct fw_descriptor vendor_id_descriptor = { |
| 888 | .length = ARRAY_SIZE(vendor_textual_descriptor), |
| 889 | .immediate = 0x03d00d1e, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 890 | .key = 0x81000000, |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 891 | .data = vendor_textual_descriptor, |
| 892 | }; |
| 893 | |
| 894 | static struct fw_descriptor model_id_descriptor = { |
| 895 | .length = ARRAY_SIZE(model_textual_descriptor), |
| 896 | .immediate = 0x17000001, |
| 897 | .key = 0x81000000, |
| 898 | .data = model_textual_descriptor, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 899 | }; |
| 900 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 901 | static int __init fw_core_init(void) |
| 902 | { |
| 903 | int retval; |
| 904 | |
| 905 | retval = bus_register(&fw_bus_type); |
| 906 | if (retval < 0) |
| 907 | return retval; |
| 908 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 909 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
| 910 | if (fw_cdev_major < 0) { |
| 911 | bus_unregister(&fw_bus_type); |
| 912 | return fw_cdev_major; |
| 913 | } |
| 914 | |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 915 | retval = fw_core_add_address_handler(&topology_map, |
| 916 | &topology_map_region); |
| 917 | BUG_ON(retval < 0); |
| 918 | |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 919 | retval = fw_core_add_address_handler(®isters, |
| 920 | ®isters_region); |
| 921 | BUG_ON(retval < 0); |
| 922 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 923 | /* Add the vendor textual descriptor. */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 924 | retval = fw_core_add_descriptor(&vendor_id_descriptor); |
| 925 | BUG_ON(retval < 0); |
| 926 | retval = fw_core_add_descriptor(&model_id_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 927 | BUG_ON(retval < 0); |
| 928 | |
| 929 | return 0; |
| 930 | } |
| 931 | |
| 932 | static void __exit fw_core_cleanup(void) |
| 933 | { |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 934 | unregister_chrdev(fw_cdev_major, "firewire"); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 935 | bus_unregister(&fw_bus_type); |
| 936 | } |
| 937 | |
| 938 | module_init(fw_core_init); |
| 939 | module_exit(fw_core_cleanup); |