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 | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 21 | #include <linux/bug.h> |
Stefan Richter | 2a0a259 | 2008-03-20 23:48:23 +0100 | [diff] [blame] | 22 | #include <linux/completion.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 23 | #include <linux/device.h> |
| 24 | #include <linux/errno.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 25 | #include <linux/firewire.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 26 | #include <linux/firewire-constants.h> |
| 27 | #include <linux/fs.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 28 | #include <linux/init.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 29 | #include <linux/idr.h> |
| 30 | #include <linux/jiffies.h> |
| 31 | #include <linux/kernel.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 32 | #include <linux/list.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 33 | #include <linux/module.h> |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 34 | #include <linux/rculist.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 35 | #include <linux/slab.h> |
| 36 | #include <linux/spinlock.h> |
| 37 | #include <linux/string.h> |
| 38 | #include <linux/timer.h> |
| 39 | #include <linux/types.h> |
Stefan Richter | 6ea9e7b | 2010-10-13 13:39:46 +0200 | [diff] [blame] | 40 | #include <linux/workqueue.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 41 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 42 | #include <asm/byteorder.h> |
| 43 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 44 | #include "core.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 45 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 46 | #define HEADER_PRI(pri) ((pri) << 0) |
| 47 | #define HEADER_TCODE(tcode) ((tcode) << 4) |
| 48 | #define HEADER_RETRY(retry) ((retry) << 8) |
| 49 | #define HEADER_TLABEL(tlabel) ((tlabel) << 10) |
| 50 | #define HEADER_DESTINATION(destination) ((destination) << 16) |
| 51 | #define HEADER_SOURCE(source) ((source) << 16) |
| 52 | #define HEADER_RCODE(rcode) ((rcode) << 12) |
| 53 | #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) |
| 54 | #define HEADER_DATA_LENGTH(length) ((length) << 16) |
| 55 | #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) |
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 HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) |
| 58 | #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) |
| 59 | #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) |
| 60 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
| 61 | #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) |
| 62 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) |
| 63 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) |
| 64 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 65 | |
Stefan Richter | a7ea678 | 2008-05-25 11:06:55 +0200 | [diff] [blame] | 66 | #define HEADER_DESTINATION_IS_BROADCAST(q) \ |
| 67 | (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f)) |
| 68 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 69 | #define PHY_PACKET_CONFIG 0x0 |
| 70 | #define PHY_PACKET_LINK_ON 0x1 |
| 71 | #define PHY_PACKET_SELF_ID 0x2 |
| 72 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 73 | #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) |
| 74 | #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) |
| 75 | #define PHY_IDENTIFIER(id) ((id) << 30) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 76 | |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 77 | /* returns 0 if the split timeout handler is already running */ |
| 78 | static int try_cancel_split_timeout(struct fw_transaction *t) |
| 79 | { |
| 80 | if (t->is_split_transaction) |
| 81 | return del_timer(&t->split_timeout_timer); |
| 82 | else |
| 83 | return 1; |
| 84 | } |
| 85 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 86 | static int close_transaction(struct fw_transaction *transaction, |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 87 | struct fw_card *card, int rcode) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 88 | { |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 89 | struct fw_transaction *t; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 90 | unsigned long flags; |
| 91 | |
| 92 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 93 | list_for_each_entry(t, &card->transaction_list, link) { |
| 94 | if (t == transaction) { |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 95 | if (!try_cancel_split_timeout(t)) { |
Clemens Ladisch | 2222bcb | 2010-08-18 15:05:02 +0200 | [diff] [blame] | 96 | spin_unlock_irqrestore(&card->lock, flags); |
| 97 | goto timed_out; |
| 98 | } |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 99 | list_del_init(&t->link); |
Stefan Richter | 1e626fd | 2009-06-14 13:23:58 +0200 | [diff] [blame] | 100 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 101 | break; |
| 102 | } |
| 103 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 104 | spin_unlock_irqrestore(&card->lock, flags); |
| 105 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 106 | if (&t->link != &card->transaction_list) { |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 107 | t->callback(card, rcode, NULL, 0, t->callback_data); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 108 | return 0; |
| 109 | } |
| 110 | |
Clemens Ladisch | 2222bcb | 2010-08-18 15:05:02 +0200 | [diff] [blame] | 111 | timed_out: |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 112 | return -ENOENT; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 113 | } |
| 114 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 115 | /* |
| 116 | * Only valid for transactions that are potentially pending (ie have |
| 117 | * been sent). |
| 118 | */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 119 | int fw_cancel_transaction(struct fw_card *card, |
| 120 | struct fw_transaction *transaction) |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 121 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 122 | /* |
| 123 | * Cancel the packet transmission if it's still queued. That |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 124 | * will call the packet transmission callback which cancels |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 125 | * the transaction. |
| 126 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 127 | |
| 128 | if (card->driver->cancel_packet(card, &transaction->packet) == 0) |
| 129 | return 0; |
| 130 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 131 | /* |
| 132 | * If the request packet has already been sent, we need to see |
| 133 | * if the transaction is still pending and remove it in that case. |
| 134 | */ |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 135 | |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 136 | return close_transaction(transaction, card, RCODE_CANCELLED); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 137 | } |
| 138 | EXPORT_SYMBOL(fw_cancel_transaction); |
| 139 | |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 140 | static void split_transaction_timeout_callback(unsigned long data) |
| 141 | { |
| 142 | struct fw_transaction *t = (struct fw_transaction *)data; |
| 143 | struct fw_card *card = t->card; |
| 144 | unsigned long flags; |
| 145 | |
| 146 | spin_lock_irqsave(&card->lock, flags); |
| 147 | if (list_empty(&t->link)) { |
| 148 | spin_unlock_irqrestore(&card->lock, flags); |
| 149 | return; |
| 150 | } |
| 151 | list_del(&t->link); |
| 152 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
| 153 | spin_unlock_irqrestore(&card->lock, flags); |
| 154 | |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 155 | t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); |
| 156 | } |
| 157 | |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 158 | static void start_split_transaction_timeout(struct fw_transaction *t, |
| 159 | struct fw_card *card) |
| 160 | { |
| 161 | unsigned long flags; |
| 162 | |
| 163 | spin_lock_irqsave(&card->lock, flags); |
| 164 | |
| 165 | if (list_empty(&t->link) || WARN_ON(t->is_split_transaction)) { |
| 166 | spin_unlock_irqrestore(&card->lock, flags); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | t->is_split_transaction = true; |
| 171 | mod_timer(&t->split_timeout_timer, |
| 172 | jiffies + card->split_timeout_jiffies); |
| 173 | |
| 174 | spin_unlock_irqrestore(&card->lock, flags); |
| 175 | } |
| 176 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 177 | static void transmit_complete_callback(struct fw_packet *packet, |
| 178 | struct fw_card *card, int status) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 179 | { |
| 180 | struct fw_transaction *t = |
| 181 | container_of(packet, struct fw_transaction, packet); |
| 182 | |
| 183 | switch (status) { |
| 184 | case ACK_COMPLETE: |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 185 | close_transaction(t, card, RCODE_COMPLETE); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 186 | break; |
| 187 | case ACK_PENDING: |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 188 | start_split_transaction_timeout(t, card); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 189 | break; |
| 190 | case ACK_BUSY_X: |
| 191 | case ACK_BUSY_A: |
| 192 | case ACK_BUSY_B: |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 193 | close_transaction(t, card, RCODE_BUSY); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 194 | break; |
| 195 | case ACK_DATA_ERROR: |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 196 | close_transaction(t, card, RCODE_DATA_ERROR); |
Kristian Høgsberg | e5f49c3 | 2007-01-26 00:38:34 -0500 | [diff] [blame] | 197 | break; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 198 | case ACK_TYPE_ERROR: |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 199 | close_transaction(t, card, RCODE_TYPE_ERROR); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 200 | break; |
| 201 | default: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 202 | /* |
| 203 | * In this case the ack is really a juju specific |
| 204 | * rcode, so just forward that to the callback. |
| 205 | */ |
Stefan Richter | a38a00f | 2009-03-10 21:07:06 +0100 | [diff] [blame] | 206 | close_transaction(t, card, status); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 207 | break; |
| 208 | } |
| 209 | } |
| 210 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 211 | static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
Stefan Richter | b9549bc | 2008-07-12 14:50:42 +0200 | [diff] [blame] | 212 | int destination_id, int source_id, int generation, int speed, |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 213 | unsigned long long offset, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 214 | { |
| 215 | int ext_tcode; |
| 216 | |
Stefan Richter | 18e9b10f | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 217 | if (tcode == TCODE_STREAM_DATA) { |
| 218 | packet->header[0] = |
| 219 | HEADER_DATA_LENGTH(length) | |
| 220 | destination_id | |
| 221 | HEADER_TCODE(TCODE_STREAM_DATA); |
| 222 | packet->header_length = 4; |
| 223 | packet->payload = payload; |
| 224 | packet->payload_length = length; |
| 225 | |
| 226 | goto common; |
| 227 | } |
| 228 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 229 | if (tcode > 0x10) { |
Jarod Wilson | 8f9f963 | 2008-01-23 16:05:45 -0500 | [diff] [blame] | 230 | ext_tcode = tcode & ~0x10; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 231 | tcode = TCODE_LOCK_REQUEST; |
| 232 | } else |
| 233 | ext_tcode = 0; |
| 234 | |
| 235 | packet->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 236 | HEADER_RETRY(RETRY_X) | |
| 237 | HEADER_TLABEL(tlabel) | |
| 238 | HEADER_TCODE(tcode) | |
Stefan Richter | b9549bc | 2008-07-12 14:50:42 +0200 | [diff] [blame] | 239 | HEADER_DESTINATION(destination_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 240 | packet->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 241 | HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 242 | packet->header[2] = |
| 243 | offset; |
| 244 | |
| 245 | switch (tcode) { |
| 246 | case TCODE_WRITE_QUADLET_REQUEST: |
| 247 | packet->header[3] = *(u32 *)payload; |
| 248 | packet->header_length = 16; |
| 249 | packet->payload_length = 0; |
| 250 | break; |
| 251 | |
| 252 | case TCODE_LOCK_REQUEST: |
| 253 | case TCODE_WRITE_BLOCK_REQUEST: |
| 254 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 255 | HEADER_DATA_LENGTH(length) | |
| 256 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 257 | packet->header_length = 16; |
| 258 | packet->payload = payload; |
| 259 | packet->payload_length = length; |
| 260 | break; |
| 261 | |
| 262 | case TCODE_READ_QUADLET_REQUEST: |
| 263 | packet->header_length = 12; |
| 264 | packet->payload_length = 0; |
| 265 | break; |
| 266 | |
| 267 | case TCODE_READ_BLOCK_REQUEST: |
| 268 | packet->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 269 | HEADER_DATA_LENGTH(length) | |
| 270 | HEADER_EXTENDED_TCODE(ext_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 271 | packet->header_length = 16; |
| 272 | packet->payload_length = 0; |
| 273 | break; |
Stefan Richter | 5b189bf | 2009-10-14 20:37:36 +0200 | [diff] [blame] | 274 | |
| 275 | default: |
Joe Perches | 5878730 | 2010-10-30 14:08:27 -0700 | [diff] [blame] | 276 | WARN(1, "wrong tcode %d\n", tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 277 | } |
Stefan Richter | 18e9b10f | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 278 | common: |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 279 | packet->speed = speed; |
| 280 | packet->generation = generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 281 | packet->ack = 0; |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 282 | packet->payload_mapped = false; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 283 | } |
| 284 | |
Clemens Ladisch | 7906054 | 2010-04-19 17:29:14 +0200 | [diff] [blame] | 285 | static int allocate_tlabel(struct fw_card *card) |
| 286 | { |
| 287 | int tlabel; |
| 288 | |
| 289 | tlabel = card->current_tlabel; |
| 290 | while (card->tlabel_mask & (1ULL << tlabel)) { |
| 291 | tlabel = (tlabel + 1) & 0x3f; |
| 292 | if (tlabel == card->current_tlabel) |
| 293 | return -EBUSY; |
| 294 | } |
| 295 | |
| 296 | card->current_tlabel = (tlabel + 1) & 0x3f; |
| 297 | card->tlabel_mask |= 1ULL << tlabel; |
| 298 | |
| 299 | return tlabel; |
| 300 | } |
| 301 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 302 | /** |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 303 | * fw_send_request() - submit a request packet for transmission |
| 304 | * @card: interface to send the request at |
| 305 | * @t: transaction instance to which the request belongs |
| 306 | * @tcode: transaction code |
| 307 | * @destination_id: destination node ID, consisting of bus_ID and phy_ID |
| 308 | * @generation: bus generation in which request and response are valid |
| 309 | * @speed: transmission speed |
| 310 | * @offset: 48bit wide offset into destination's address space |
| 311 | * @payload: data payload for the request subaction |
| 312 | * @length: length of the payload, in bytes |
| 313 | * @callback: function to be called when the transaction is completed |
| 314 | * @callback_data: data to be passed to the transaction completion callback |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 315 | * |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 316 | * Submit a request packet into the asynchronous request transmission queue. |
| 317 | * Can be called from atomic context. If you prefer a blocking API, use |
| 318 | * fw_run_transaction() in a context that can sleep. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 319 | * |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 320 | * In case of lock requests, specify one of the firewire-core specific %TCODE_ |
| 321 | * constants instead of %TCODE_LOCK_REQUEST in @tcode. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 322 | * |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 323 | * Make sure that the value in @destination_id is not older than the one in |
| 324 | * @generation. Otherwise the request is in danger to be sent to a wrong node. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 325 | * |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 326 | * In case of asynchronous stream packets i.e. %TCODE_STREAM_DATA, the caller |
Stefan Richter | 18e9b10f | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 327 | * needs to synthesize @destination_id with fw_stream_packet_destination_id(). |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 328 | * It will contain tag, channel, and sy data instead of a node ID then. |
| 329 | * |
| 330 | * The payload buffer at @data is going to be DMA-mapped except in case of |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 331 | * @length <= 8 or of local (loopback) requests. Hence make sure that the |
| 332 | * buffer complies with the restrictions of the streaming DMA mapping API. |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 333 | * @payload must not be freed before the @callback is called. |
| 334 | * |
| 335 | * In case of request types without payload, @data is NULL and @length is 0. |
| 336 | * |
| 337 | * After the transaction is completed successfully or unsuccessfully, the |
| 338 | * @callback will be called. Among its parameters is the response code which |
| 339 | * is either one of the rcodes per IEEE 1394 or, in case of internal errors, |
Stefan Richter | 18d0cdf | 2010-07-18 12:44:01 +0200 | [diff] [blame] | 340 | * the firewire-core specific %RCODE_SEND_ERROR. The other firewire-core |
| 341 | * specific rcodes (%RCODE_CANCELLED, %RCODE_BUSY, %RCODE_GENERATION, |
| 342 | * %RCODE_NO_ACK) denote transaction timeout, busy responder, stale request |
| 343 | * generation, or missing ACK respectively. |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 344 | * |
| 345 | * Note some timing corner cases: fw_send_request() may complete much earlier |
| 346 | * than when the request packet actually hits the wire. On the other hand, |
| 347 | * transaction completion and hence execution of @callback may happen even |
| 348 | * before fw_send_request() returns. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 349 | */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 350 | void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, |
| 351 | int destination_id, int generation, int speed, |
| 352 | unsigned long long offset, void *payload, size_t length, |
| 353 | fw_transaction_callback_t callback, void *callback_data) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 354 | { |
| 355 | unsigned long flags; |
Stefan Richter | b9549bc | 2008-07-12 14:50:42 +0200 | [diff] [blame] | 356 | int tlabel; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 357 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 358 | /* |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 359 | * Allocate tlabel from the bitmap and put the transaction on |
| 360 | * the list while holding the card spinlock. |
| 361 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 362 | |
| 363 | spin_lock_irqsave(&card->lock, flags); |
| 364 | |
Clemens Ladisch | 7906054 | 2010-04-19 17:29:14 +0200 | [diff] [blame] | 365 | tlabel = allocate_tlabel(card); |
| 366 | if (tlabel < 0) { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 367 | spin_unlock_irqrestore(&card->lock, flags); |
| 368 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); |
| 369 | return; |
| 370 | } |
| 371 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 372 | t->node_id = destination_id; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 373 | t->tlabel = tlabel; |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 374 | t->card = card; |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 375 | t->is_split_transaction = false; |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 376 | setup_timer(&t->split_timeout_timer, |
| 377 | split_transaction_timeout_callback, (unsigned long)t); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 378 | t->callback = callback; |
| 379 | t->callback_data = callback_data; |
| 380 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 381 | fw_fill_request(&t->packet, tcode, t->tlabel, |
| 382 | destination_id, card->node_id, generation, |
| 383 | speed, offset, payload, length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 384 | t->packet.callback = transmit_complete_callback; |
| 385 | |
Stefan Richter | e9aeb46 | 2008-07-12 14:50:06 +0200 | [diff] [blame] | 386 | list_add_tail(&t->link, &card->transaction_list); |
| 387 | |
| 388 | spin_unlock_irqrestore(&card->lock, flags); |
| 389 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 390 | card->driver->send_request(card, &t->packet); |
| 391 | } |
| 392 | EXPORT_SYMBOL(fw_send_request); |
| 393 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 394 | struct transaction_callback_data { |
| 395 | struct completion done; |
| 396 | void *payload; |
| 397 | int rcode; |
| 398 | }; |
| 399 | |
| 400 | static void transaction_callback(struct fw_card *card, int rcode, |
| 401 | void *payload, size_t length, void *data) |
| 402 | { |
| 403 | struct transaction_callback_data *d = data; |
| 404 | |
| 405 | if (rcode == RCODE_COMPLETE) |
| 406 | memcpy(d->payload, payload, length); |
| 407 | d->rcode = rcode; |
| 408 | complete(&d->done); |
| 409 | } |
| 410 | |
| 411 | /** |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 412 | * fw_run_transaction() - send request and sleep until transaction is completed |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 413 | * |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 414 | * Returns the RCODE. See fw_send_request() for parameter documentation. |
| 415 | * Unlike fw_send_request(), @data points to the payload of the request or/and |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 416 | * to the payload of the response. DMA mapping restrictions apply to outbound |
| 417 | * request payloads of >= 8 bytes but not to inbound response payloads. |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 418 | */ |
| 419 | int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 420 | int generation, int speed, unsigned long long offset, |
Stefan Richter | ba27e1f | 2009-03-05 19:07:00 +0100 | [diff] [blame] | 421 | void *payload, size_t length) |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 422 | { |
| 423 | struct transaction_callback_data d; |
| 424 | struct fw_transaction t; |
| 425 | |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 426 | init_timer_on_stack(&t.split_timeout_timer); |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 427 | init_completion(&d.done); |
Stefan Richter | ba27e1f | 2009-03-05 19:07:00 +0100 | [diff] [blame] | 428 | d.payload = payload; |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 429 | fw_send_request(card, &t, tcode, destination_id, generation, speed, |
Stefan Richter | ba27e1f | 2009-03-05 19:07:00 +0100 | [diff] [blame] | 430 | offset, payload, length, transaction_callback, &d); |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 431 | wait_for_completion(&d.done); |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 432 | destroy_timer_on_stack(&t.split_timeout_timer); |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 433 | |
| 434 | return d.rcode; |
| 435 | } |
| 436 | EXPORT_SYMBOL(fw_run_transaction); |
| 437 | |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 438 | static DEFINE_MUTEX(phy_config_mutex); |
| 439 | static DECLARE_COMPLETION(phy_config_done); |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 440 | |
| 441 | static void transmit_phy_packet_callback(struct fw_packet *packet, |
| 442 | struct fw_card *card, int status) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 443 | { |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 444 | complete(&phy_config_done); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 445 | } |
| 446 | |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 447 | static struct fw_packet phy_config_packet = { |
Clemens Ladisch | 5b06db1 | 2010-11-30 08:24:47 +0100 | [diff] [blame] | 448 | .header_length = 12, |
| 449 | .header[0] = TCODE_LINK_INTERNAL << 4, |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 450 | .payload_length = 0, |
| 451 | .speed = SCODE_100, |
| 452 | .callback = transmit_phy_packet_callback, |
| 453 | }; |
| 454 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 455 | void fw_send_phy_config(struct fw_card *card, |
| 456 | int node_id, int generation, int gap_count) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 457 | { |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 458 | long timeout = DIV_ROUND_UP(HZ, 10); |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 459 | u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); |
| 460 | |
| 461 | if (node_id != FW_PHY_CONFIG_NO_NODE_ID) |
| 462 | data |= PHY_CONFIG_ROOT_ID(node_id); |
| 463 | |
| 464 | if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { |
| 465 | gap_count = card->driver->read_phy_reg(card, 1); |
| 466 | if (gap_count < 0) |
| 467 | return; |
| 468 | |
| 469 | gap_count &= 63; |
| 470 | if (gap_count == 63) |
| 471 | return; |
| 472 | } |
| 473 | data |= PHY_CONFIG_GAP_COUNT(gap_count); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 474 | |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 475 | mutex_lock(&phy_config_mutex); |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 476 | |
Clemens Ladisch | 5b06db1 | 2010-11-30 08:24:47 +0100 | [diff] [blame] | 477 | phy_config_packet.header[1] = data; |
| 478 | phy_config_packet.header[2] = ~data; |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 479 | phy_config_packet.generation = generation; |
| 480 | INIT_COMPLETION(phy_config_done); |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 481 | |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 482 | card->driver->send_request(card, &phy_config_packet); |
| 483 | wait_for_completion_timeout(&phy_config_done, timeout); |
Stefan Richter | ae1e535 | 2008-06-18 18:20:45 +0200 | [diff] [blame] | 484 | |
Stefan Richter | c0220d6 | 2008-07-22 21:35:47 +0200 | [diff] [blame] | 485 | mutex_unlock(&phy_config_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 486 | } |
| 487 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 488 | static struct fw_address_handler *lookup_overlapping_address_handler( |
| 489 | struct list_head *list, unsigned long long offset, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 490 | { |
| 491 | struct fw_address_handler *handler; |
| 492 | |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 493 | list_for_each_entry_rcu(handler, list, link) { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 494 | if (handler->offset < offset + length && |
| 495 | offset < handler->offset + handler->length) |
| 496 | return handler; |
| 497 | } |
| 498 | |
| 499 | return NULL; |
| 500 | } |
| 501 | |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 502 | static bool is_enclosing_handler(struct fw_address_handler *handler, |
| 503 | unsigned long long offset, size_t length) |
| 504 | { |
| 505 | return handler->offset <= offset && |
| 506 | offset + length <= handler->offset + handler->length; |
| 507 | } |
| 508 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 509 | static struct fw_address_handler *lookup_enclosing_address_handler( |
| 510 | struct list_head *list, unsigned long long offset, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 511 | { |
| 512 | struct fw_address_handler *handler; |
| 513 | |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 514 | list_for_each_entry_rcu(handler, list, link) { |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 515 | if (is_enclosing_handler(handler, offset, length)) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 516 | return handler; |
| 517 | } |
| 518 | |
| 519 | return NULL; |
| 520 | } |
| 521 | |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 522 | static DEFINE_SPINLOCK(address_handler_list_lock); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 523 | static LIST_HEAD(address_handler_list); |
| 524 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 525 | const struct fw_address_region fw_high_memory_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 526 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
Adrian Bunk | db8be07 | 2008-03-31 02:22:11 +0300 | [diff] [blame] | 527 | EXPORT_SYMBOL(fw_high_memory_region); |
| 528 | |
Clemens Ladisch | f07d42a | 2012-05-24 19:28:58 +0200 | [diff] [blame] | 529 | static const struct fw_address_region low_memory_region = |
Adrian Bunk | db8be07 | 2008-03-31 02:22:11 +0300 | [diff] [blame] | 530 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; |
Clemens Ladisch | f07d42a | 2012-05-24 19:28:58 +0200 | [diff] [blame] | 531 | |
| 532 | #if 0 |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 533 | const struct fw_address_region fw_private_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 534 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 535 | const struct fw_address_region fw_csr_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 536 | { .start = CSR_REGISTER_BASE, |
| 537 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 538 | const struct fw_address_region fw_unit_space_region = |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 539 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
Adrian Bunk | db8be07 | 2008-03-31 02:22:11 +0300 | [diff] [blame] | 540 | #endif /* 0 */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 541 | |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 542 | static bool is_in_fcp_region(u64 offset, size_t length) |
| 543 | { |
| 544 | return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && |
| 545 | offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); |
| 546 | } |
| 547 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 548 | /** |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 549 | * fw_core_add_address_handler() - register for incoming requests |
| 550 | * @handler: callback |
| 551 | * @region: region in the IEEE 1212 node space address range |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 552 | * |
| 553 | * region->start, ->end, and handler->length have to be quadlet-aligned. |
| 554 | * |
| 555 | * When a request is received that falls within the specified address range, |
| 556 | * the specified callback is invoked. The parameters passed to the callback |
| 557 | * give the details of the particular request. |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 558 | * |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 559 | * To be called in process context. |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 560 | * Return value: 0 on success, non-zero otherwise. |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 561 | * |
Stefan Richter | 1415d91 | 2007-07-17 02:10:16 +0200 | [diff] [blame] | 562 | * The start offset of the handler's address region is determined by |
| 563 | * fw_core_add_address_handler() and is returned in handler->offset. |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 564 | * |
| 565 | * Address allocations are exclusive, except for the FCP registers. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 566 | */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 567 | int fw_core_add_address_handler(struct fw_address_handler *handler, |
| 568 | const struct fw_address_region *region) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 569 | { |
| 570 | struct fw_address_handler *other; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 571 | int ret = -EBUSY; |
| 572 | |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 573 | if (region->start & 0xffff000000000003ULL || |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 574 | region->start >= region->end || |
Stefan Richter | 0c9ae70 | 2010-07-23 13:02:54 +0200 | [diff] [blame] | 575 | region->end > 0x0001000000000000ULL || |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 576 | handler->length & 3 || |
| 577 | handler->length == 0) |
| 578 | return -EINVAL; |
| 579 | |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 580 | spin_lock(&address_handler_list_lock); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 581 | |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 582 | handler->offset = region->start; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 583 | while (handler->offset + handler->length <= region->end) { |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 584 | if (is_in_fcp_region(handler->offset, handler->length)) |
| 585 | other = NULL; |
| 586 | else |
| 587 | other = lookup_overlapping_address_handler |
| 588 | (&address_handler_list, |
| 589 | handler->offset, handler->length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 590 | if (other != NULL) { |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 591 | handler->offset += other->length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 592 | } else { |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 593 | list_add_tail_rcu(&handler->link, &address_handler_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 594 | ret = 0; |
| 595 | break; |
| 596 | } |
| 597 | } |
| 598 | |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 599 | spin_unlock(&address_handler_list_lock); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 600 | |
| 601 | return ret; |
| 602 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 603 | EXPORT_SYMBOL(fw_core_add_address_handler); |
| 604 | |
| 605 | /** |
Stefan Richter | 656b7af | 2010-07-07 13:26:18 +0200 | [diff] [blame] | 606 | * fw_core_remove_address_handler() - unregister an address handler |
Stefan Richter | 90963f1 | 2012-02-18 19:54:45 +0100 | [diff] [blame] | 607 | * |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 608 | * To be called in process context. |
| 609 | * |
Stefan Richter | 90963f1 | 2012-02-18 19:54:45 +0100 | [diff] [blame] | 610 | * When fw_core_remove_address_handler() returns, @handler->callback() is |
| 611 | * guaranteed to not run on any CPU anymore. |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 612 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 613 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
| 614 | { |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 615 | spin_lock(&address_handler_list_lock); |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 616 | list_del_rcu(&handler->link); |
Stefan Richter | 4d50c44 | 2012-09-27 21:46:09 +0200 | [diff] [blame] | 617 | spin_unlock(&address_handler_list_lock); |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 618 | synchronize_rcu(); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 619 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 620 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
| 621 | |
| 622 | struct fw_request { |
| 623 | struct fw_packet response; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 624 | u32 request_header[4]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 625 | int ack; |
| 626 | u32 length; |
| 627 | u32 data[0]; |
| 628 | }; |
| 629 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 630 | static void free_response_callback(struct fw_packet *packet, |
| 631 | struct fw_card *card, int status) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 632 | { |
| 633 | struct fw_request *request; |
| 634 | |
| 635 | request = container_of(packet, struct fw_request, response); |
| 636 | kfree(request); |
| 637 | } |
| 638 | |
Clemens Ladisch | a10c0ce7 | 2010-05-19 08:28:32 +0200 | [diff] [blame] | 639 | int fw_get_response_length(struct fw_request *r) |
| 640 | { |
| 641 | int tcode, ext_tcode, data_length; |
| 642 | |
| 643 | tcode = HEADER_GET_TCODE(r->request_header[0]); |
| 644 | |
| 645 | switch (tcode) { |
| 646 | case TCODE_WRITE_QUADLET_REQUEST: |
| 647 | case TCODE_WRITE_BLOCK_REQUEST: |
| 648 | return 0; |
| 649 | |
| 650 | case TCODE_READ_QUADLET_REQUEST: |
| 651 | return 4; |
| 652 | |
| 653 | case TCODE_READ_BLOCK_REQUEST: |
| 654 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); |
| 655 | return data_length; |
| 656 | |
| 657 | case TCODE_LOCK_REQUEST: |
| 658 | ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); |
| 659 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); |
| 660 | switch (ext_tcode) { |
| 661 | case EXTCODE_FETCH_ADD: |
| 662 | case EXTCODE_LITTLE_ADD: |
| 663 | return data_length; |
| 664 | default: |
| 665 | return data_length / 2; |
| 666 | } |
| 667 | |
| 668 | default: |
Joe Perches | 5878730 | 2010-10-30 14:08:27 -0700 | [diff] [blame] | 669 | WARN(1, "wrong tcode %d\n", tcode); |
Clemens Ladisch | a10c0ce7 | 2010-05-19 08:28:32 +0200 | [diff] [blame] | 670 | return 0; |
| 671 | } |
| 672 | } |
| 673 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 674 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
| 675 | int rcode, void *payload, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 676 | { |
| 677 | int tcode, tlabel, extended_tcode, source, destination; |
| 678 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 679 | tcode = HEADER_GET_TCODE(request_header[0]); |
| 680 | tlabel = HEADER_GET_TLABEL(request_header[0]); |
| 681 | source = HEADER_GET_DESTINATION(request_header[0]); |
| 682 | destination = HEADER_GET_SOURCE(request_header[1]); |
| 683 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 684 | |
| 685 | response->header[0] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 686 | HEADER_RETRY(RETRY_1) | |
| 687 | HEADER_TLABEL(tlabel) | |
| 688 | HEADER_DESTINATION(destination); |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 689 | response->header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 690 | HEADER_SOURCE(source) | |
| 691 | HEADER_RCODE(rcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 692 | response->header[2] = 0; |
| 693 | |
| 694 | switch (tcode) { |
| 695 | case TCODE_WRITE_QUADLET_REQUEST: |
| 696 | case TCODE_WRITE_BLOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 697 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 698 | response->header_length = 12; |
| 699 | response->payload_length = 0; |
| 700 | break; |
| 701 | |
| 702 | case TCODE_READ_QUADLET_REQUEST: |
| 703 | response->header[0] |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 704 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 705 | if (payload != NULL) |
| 706 | response->header[3] = *(u32 *)payload; |
| 707 | else |
| 708 | response->header[3] = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 709 | response->header_length = 16; |
| 710 | response->payload_length = 0; |
| 711 | break; |
| 712 | |
| 713 | case TCODE_READ_BLOCK_REQUEST: |
| 714 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 715 | response->header[0] |= HEADER_TCODE(tcode + 2); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 716 | response->header[3] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 717 | HEADER_DATA_LENGTH(length) | |
| 718 | HEADER_EXTENDED_TCODE(extended_tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 719 | response->header_length = 16; |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 720 | response->payload = payload; |
| 721 | response->payload_length = length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 722 | break; |
| 723 | |
| 724 | default: |
Joe Perches | 5878730 | 2010-10-30 14:08:27 -0700 | [diff] [blame] | 725 | WARN(1, "wrong tcode %d\n", tcode); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 726 | } |
Stefan Richter | 1d1dc5e | 2008-12-10 00:20:38 +0100 | [diff] [blame] | 727 | |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 728 | response->payload_mapped = false; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 729 | } |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 730 | EXPORT_SYMBOL(fw_fill_response); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 731 | |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 732 | static u32 compute_split_timeout_timestamp(struct fw_card *card, |
| 733 | u32 request_timestamp) |
| 734 | { |
| 735 | unsigned int cycles; |
| 736 | u32 timestamp; |
| 737 | |
| 738 | cycles = card->split_timeout_cycles; |
| 739 | cycles += request_timestamp & 0x1fff; |
| 740 | |
| 741 | timestamp = request_timestamp & ~0x1fff; |
| 742 | timestamp += (cycles / 8000) << 13; |
| 743 | timestamp |= cycles % 8000; |
| 744 | |
| 745 | return timestamp; |
| 746 | } |
| 747 | |
| 748 | static struct fw_request *allocate_request(struct fw_card *card, |
| 749 | struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 750 | { |
| 751 | struct fw_request *request; |
| 752 | u32 *data, length; |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 753 | int request_tcode; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 754 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 755 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 756 | switch (request_tcode) { |
| 757 | case TCODE_WRITE_QUADLET_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 758 | data = &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 759 | length = 4; |
| 760 | break; |
| 761 | |
| 762 | case TCODE_WRITE_BLOCK_REQUEST: |
| 763 | case TCODE_LOCK_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 764 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 765 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 766 | break; |
| 767 | |
| 768 | case TCODE_READ_QUADLET_REQUEST: |
| 769 | data = NULL; |
| 770 | length = 4; |
| 771 | break; |
| 772 | |
| 773 | case TCODE_READ_BLOCK_REQUEST: |
| 774 | data = NULL; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 775 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 776 | break; |
| 777 | |
| 778 | default: |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 779 | fw_notice(card, "ERROR - corrupt request received - %08x %08x %08x\n", |
Stefan Richter | 0bf607c | 2008-05-31 19:01:26 +0200 | [diff] [blame] | 780 | p->header[0], p->header[1], p->header[2]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 781 | return NULL; |
| 782 | } |
| 783 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 784 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 785 | if (request == NULL) |
| 786 | return NULL; |
| 787 | |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 788 | request->response.speed = p->speed; |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 789 | request->response.timestamp = |
| 790 | compute_split_timeout_timestamp(card, p->timestamp); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 791 | request->response.generation = p->generation; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 792 | request->response.ack = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 793 | request->response.callback = free_response_callback; |
| 794 | request->ack = p->ack; |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 795 | request->length = length; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 796 | if (data) |
Kristian Høgsberg | 6e2e842 | 2007-02-16 17:34:37 -0500 | [diff] [blame] | 797 | memcpy(request->data, data, length); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 798 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 799 | memcpy(request->request_header, p->header, sizeof(p->header)); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 800 | |
| 801 | return request; |
| 802 | } |
| 803 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 804 | void fw_send_response(struct fw_card *card, |
| 805 | struct fw_request *request, int rcode) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 806 | { |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 807 | if (WARN_ONCE(!request, "invalid for FCP address handlers")) |
| 808 | return; |
| 809 | |
Stefan Richter | a7ea678 | 2008-05-25 11:06:55 +0200 | [diff] [blame] | 810 | /* unified transaction or broadcast transaction: don't respond */ |
| 811 | if (request->ack != ACK_PENDING || |
| 812 | HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 813 | kfree(request); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 814 | return; |
Stefan Richter | 9c9bdf4 | 2007-07-17 02:15:36 +0200 | [diff] [blame] | 815 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 816 | |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 817 | if (rcode == RCODE_COMPLETE) |
| 818 | fw_fill_response(&request->response, request->request_header, |
Clemens Ladisch | a10c0ce7 | 2010-05-19 08:28:32 +0200 | [diff] [blame] | 819 | rcode, request->data, |
| 820 | fw_get_response_length(request)); |
Kristian Høgsberg | 36bfe49 | 2007-01-26 00:38:13 -0500 | [diff] [blame] | 821 | else |
| 822 | fw_fill_response(&request->response, request->request_header, |
| 823 | rcode, NULL, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 824 | |
| 825 | card->driver->send_response(card, &request->response); |
| 826 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 827 | EXPORT_SYMBOL(fw_send_response); |
| 828 | |
Chris Boot | 253d923 | 2012-02-16 09:16:35 +0000 | [diff] [blame] | 829 | /** |
| 830 | * fw_get_request_speed() - returns speed at which the @request was received |
| 831 | */ |
| 832 | int fw_get_request_speed(struct fw_request *request) |
| 833 | { |
| 834 | return request->response.speed; |
| 835 | } |
| 836 | EXPORT_SYMBOL(fw_get_request_speed); |
| 837 | |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 838 | static void handle_exclusive_region_request(struct fw_card *card, |
| 839 | struct fw_packet *p, |
| 840 | struct fw_request *request, |
| 841 | unsigned long long offset) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 842 | { |
| 843 | struct fw_address_handler *handler; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 844 | int tcode, destination, source; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 845 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 846 | destination = HEADER_GET_DESTINATION(p->header[0]); |
Rabin Vincent | 478b233 | 2007-12-21 23:02:15 +0530 | [diff] [blame] | 847 | source = HEADER_GET_SOURCE(p->header[1]); |
Jay Fenlason | c82f91f | 2010-05-18 10:57:33 -0400 | [diff] [blame] | 848 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 849 | if (tcode == TCODE_LOCK_REQUEST) |
| 850 | tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 851 | |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 852 | rcu_read_lock(); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 853 | handler = lookup_enclosing_address_handler(&address_handler_list, |
| 854 | offset, request->length); |
Stefan Richter | 90963f1 | 2012-02-18 19:54:45 +0100 | [diff] [blame] | 855 | if (handler) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 856 | handler->address_callback(card, request, |
| 857 | tcode, destination, source, |
Stefan Richter | 33e553f | 2010-06-20 22:50:35 +0200 | [diff] [blame] | 858 | p->generation, offset, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 859 | request->data, request->length, |
| 860 | handler->callback_data); |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 861 | rcu_read_unlock(); |
Stefan Richter | 90963f1 | 2012-02-18 19:54:45 +0100 | [diff] [blame] | 862 | |
| 863 | if (!handler) |
| 864 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 865 | } |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 866 | |
| 867 | static void handle_fcp_region_request(struct fw_card *card, |
| 868 | struct fw_packet *p, |
| 869 | struct fw_request *request, |
| 870 | unsigned long long offset) |
| 871 | { |
| 872 | struct fw_address_handler *handler; |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 873 | int tcode, destination, source; |
| 874 | |
| 875 | if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && |
| 876 | offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || |
| 877 | request->length > 0x200) { |
| 878 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 879 | |
| 880 | return; |
| 881 | } |
| 882 | |
| 883 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 884 | destination = HEADER_GET_DESTINATION(p->header[0]); |
| 885 | source = HEADER_GET_SOURCE(p->header[1]); |
| 886 | |
| 887 | if (tcode != TCODE_WRITE_QUADLET_REQUEST && |
| 888 | tcode != TCODE_WRITE_BLOCK_REQUEST) { |
| 889 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 890 | |
| 891 | return; |
| 892 | } |
| 893 | |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 894 | rcu_read_lock(); |
| 895 | list_for_each_entry_rcu(handler, &address_handler_list, link) { |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 896 | if (is_enclosing_handler(handler, offset, request->length)) |
| 897 | handler->address_callback(card, NULL, tcode, |
| 898 | destination, source, |
Stefan Richter | 33e553f | 2010-06-20 22:50:35 +0200 | [diff] [blame] | 899 | p->generation, offset, |
| 900 | request->data, |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 901 | request->length, |
| 902 | handler->callback_data); |
| 903 | } |
Peter Hurley | 35202f7 | 2012-08-19 02:50:02 -0400 | [diff] [blame] | 904 | rcu_read_unlock(); |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 905 | |
| 906 | fw_send_response(card, request, RCODE_COMPLETE); |
| 907 | } |
| 908 | |
| 909 | void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) |
| 910 | { |
| 911 | struct fw_request *request; |
| 912 | unsigned long long offset; |
| 913 | |
| 914 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) |
| 915 | return; |
| 916 | |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 917 | if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) { |
| 918 | fw_cdev_handle_phy_packet(card, p); |
| 919 | return; |
| 920 | } |
| 921 | |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 922 | request = allocate_request(card, p); |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 923 | if (request == NULL) { |
| 924 | /* FIXME: send statically allocated busy packet. */ |
| 925 | return; |
| 926 | } |
| 927 | |
| 928 | offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | |
| 929 | p->header[2]; |
| 930 | |
| 931 | if (!is_in_fcp_region(offset, request->length)) |
| 932 | handle_exclusive_region_request(card, p, request, offset); |
| 933 | else |
| 934 | handle_fcp_region_request(card, p, request, offset); |
| 935 | |
| 936 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 937 | EXPORT_SYMBOL(fw_core_handle_request); |
| 938 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 939 | void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 940 | { |
| 941 | struct fw_transaction *t; |
| 942 | unsigned long flags; |
| 943 | u32 *data; |
| 944 | size_t data_length; |
Stefan Richter | ae86e81 | 2010-06-15 01:22:45 +0200 | [diff] [blame] | 945 | int tcode, tlabel, source, rcode; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 946 | |
Stefan Richter | ae86e81 | 2010-06-15 01:22:45 +0200 | [diff] [blame] | 947 | tcode = HEADER_GET_TCODE(p->header[0]); |
| 948 | tlabel = HEADER_GET_TLABEL(p->header[0]); |
| 949 | source = HEADER_GET_SOURCE(p->header[1]); |
| 950 | rcode = HEADER_GET_RCODE(p->header[1]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 951 | |
| 952 | spin_lock_irqsave(&card->lock, flags); |
| 953 | list_for_each_entry(t, &card->transaction_list, link) { |
| 954 | if (t->node_id == source && t->tlabel == tlabel) { |
Clemens Ladisch | 410cf2b | 2010-12-13 14:56:02 +0100 | [diff] [blame] | 955 | if (!try_cancel_split_timeout(t)) { |
Clemens Ladisch | 2222bcb | 2010-08-18 15:05:02 +0200 | [diff] [blame] | 956 | spin_unlock_irqrestore(&card->lock, flags); |
| 957 | goto timed_out; |
| 958 | } |
Clemens Ladisch | 5c40cbf | 2010-04-27 09:07:00 +0200 | [diff] [blame] | 959 | list_del_init(&t->link); |
Peter Hurley | 753a897 | 2010-04-23 19:27:25 -0400 | [diff] [blame] | 960 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 961 | break; |
| 962 | } |
| 963 | } |
| 964 | spin_unlock_irqrestore(&card->lock, flags); |
| 965 | |
| 966 | if (&t->link == &card->transaction_list) { |
Clemens Ladisch | 2222bcb | 2010-08-18 15:05:02 +0200 | [diff] [blame] | 967 | timed_out: |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 968 | fw_notice(card, "unsolicited response (source %x, tlabel %x)\n", |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 969 | source, tlabel); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 970 | return; |
| 971 | } |
| 972 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 973 | /* |
| 974 | * FIXME: sanity check packet, is length correct, does tcodes |
| 975 | * and addresses match. |
| 976 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 977 | |
| 978 | switch (tcode) { |
| 979 | case TCODE_READ_QUADLET_RESPONSE: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 980 | data = (u32 *) &p->header[3]; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 981 | data_length = 4; |
| 982 | break; |
| 983 | |
| 984 | case TCODE_WRITE_RESPONSE: |
| 985 | data = NULL; |
| 986 | data_length = 0; |
| 987 | break; |
| 988 | |
| 989 | case TCODE_READ_BLOCK_RESPONSE: |
| 990 | case TCODE_LOCK_RESPONSE: |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 991 | data = p->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 992 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 993 | break; |
| 994 | |
| 995 | default: |
| 996 | /* Should never happen, this is just to shut up gcc. */ |
| 997 | data = NULL; |
| 998 | data_length = 0; |
| 999 | break; |
| 1000 | } |
| 1001 | |
Stefan Richter | 10a4c73 | 2008-03-16 00:56:41 +0100 | [diff] [blame] | 1002 | /* |
| 1003 | * The response handler may be executed while the request handler |
| 1004 | * is still pending. Cancel the request handler. |
| 1005 | */ |
| 1006 | card->driver->cancel_packet(card, &t->packet); |
| 1007 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1008 | t->callback(card, rcode, data, data_length, t->callback_data); |
| 1009 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1010 | EXPORT_SYMBOL(fw_core_handle_response); |
| 1011 | |
Clemens Ladisch | 7bdbff6 | 2012-04-11 17:38:10 +0200 | [diff] [blame] | 1012 | /** |
| 1013 | * fw_rcode_string - convert a firewire result code to an error description |
| 1014 | * @rcode: the result code |
| 1015 | */ |
| 1016 | const char *fw_rcode_string(int rcode) |
| 1017 | { |
| 1018 | static const char *const names[] = { |
| 1019 | [RCODE_COMPLETE] = "no error", |
| 1020 | [RCODE_CONFLICT_ERROR] = "conflict error", |
| 1021 | [RCODE_DATA_ERROR] = "data error", |
| 1022 | [RCODE_TYPE_ERROR] = "type error", |
| 1023 | [RCODE_ADDRESS_ERROR] = "address error", |
| 1024 | [RCODE_SEND_ERROR] = "send error", |
| 1025 | [RCODE_CANCELLED] = "timeout", |
| 1026 | [RCODE_BUSY] = "busy", |
| 1027 | [RCODE_GENERATION] = "bus reset", |
| 1028 | [RCODE_NO_ACK] = "no ack", |
| 1029 | }; |
| 1030 | |
| 1031 | if ((unsigned int)rcode < ARRAY_SIZE(names) && names[rcode]) |
| 1032 | return names[rcode]; |
| 1033 | else |
| 1034 | return "unknown"; |
| 1035 | } |
| 1036 | EXPORT_SYMBOL(fw_rcode_string); |
| 1037 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 1038 | static const struct fw_address_region topology_map_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 1039 | { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, |
| 1040 | .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1041 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1042 | static void handle_topology_map(struct fw_card *card, struct fw_request *request, |
| 1043 | int tcode, int destination, int source, int generation, |
Stefan Richter | 33e553f | 2010-06-20 22:50:35 +0200 | [diff] [blame] | 1044 | unsigned long long offset, void *payload, size_t length, |
| 1045 | void *callback_data) |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1046 | { |
Stefan Richter | cb7c96d | 2009-10-08 00:42:53 +0200 | [diff] [blame] | 1047 | int start; |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1048 | |
| 1049 | if (!TCODE_IS_READ_REQUEST(tcode)) { |
| 1050 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 1051 | return; |
| 1052 | } |
| 1053 | |
| 1054 | if ((offset & 3) > 0 || (length & 3) > 0) { |
| 1055 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
| 1056 | return; |
| 1057 | } |
| 1058 | |
| 1059 | start = (offset - topology_map_region.start) / 4; |
Stefan Richter | cb7c96d | 2009-10-08 00:42:53 +0200 | [diff] [blame] | 1060 | memcpy(payload, &card->topology_map[start], length); |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1061 | |
| 1062 | fw_send_response(card, request, RCODE_COMPLETE); |
| 1063 | } |
| 1064 | |
| 1065 | static struct fw_address_handler topology_map = { |
Stefan Richter | 85cb9b6 | 2009-09-08 01:13:53 +0200 | [diff] [blame] | 1066 | .length = 0x400, |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1067 | .address_callback = handle_topology_map, |
| 1068 | }; |
| 1069 | |
Stefan Richter | ae57988 | 2007-08-02 20:34:17 +0200 | [diff] [blame] | 1070 | static const struct fw_address_region registers_region = |
Jarod Wilson | cca6097 | 2008-03-08 12:52:03 -0500 | [diff] [blame] | 1071 | { .start = CSR_REGISTER_BASE, |
| 1072 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1073 | |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 1074 | static void update_split_timeout(struct fw_card *card) |
| 1075 | { |
| 1076 | unsigned int cycles; |
| 1077 | |
| 1078 | cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19); |
| 1079 | |
Stefan Richter | 4ec4a67 | 2011-09-19 00:20:48 +0200 | [diff] [blame] | 1080 | /* minimum per IEEE 1394, maximum which doesn't overflow OHCI */ |
| 1081 | cycles = clamp(cycles, 800u, 3u * 8000u); |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 1082 | |
| 1083 | card->split_timeout_cycles = cycles; |
| 1084 | card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000); |
| 1085 | } |
| 1086 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1087 | static void handle_registers(struct fw_card *card, struct fw_request *request, |
| 1088 | int tcode, int destination, int source, int generation, |
Stefan Richter | 33e553f | 2010-06-20 22:50:35 +0200 | [diff] [blame] | 1089 | unsigned long long offset, void *payload, size_t length, |
| 1090 | void *callback_data) |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1091 | { |
Jarod Wilson | 15f0d83 | 2008-03-08 13:18:58 -0500 | [diff] [blame] | 1092 | int reg = offset & ~CSR_REGISTER_BASE; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1093 | __be32 *data = payload; |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 1094 | int rcode = RCODE_COMPLETE; |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 1095 | unsigned long flags; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1096 | |
| 1097 | switch (reg) { |
Stefan Richter | b384cf1 | 2010-06-12 20:35:21 +0200 | [diff] [blame] | 1098 | case CSR_PRIORITY_BUDGET: |
| 1099 | if (!card->priority_budget_implemented) { |
| 1100 | rcode = RCODE_ADDRESS_ERROR; |
| 1101 | break; |
| 1102 | } |
| 1103 | /* else fall through */ |
Clemens Ladisch | 3e07ec0 | 2010-06-10 08:24:03 +0200 | [diff] [blame] | 1104 | |
Clemens Ladisch | 506f1a3 | 2010-06-10 08:25:19 +0200 | [diff] [blame] | 1105 | case CSR_NODE_IDS: |
Stefan Richter | 65b2742 | 2010-06-12 20:26:51 +0200 | [diff] [blame] | 1106 | /* |
| 1107 | * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8 |
| 1108 | * and 9.6, but interoperable with IEEE 1394.1-2004 bridges |
| 1109 | */ |
Stefan Richter | b384cf1 | 2010-06-12 20:35:21 +0200 | [diff] [blame] | 1110 | /* fall through */ |
| 1111 | |
| 1112 | case CSR_STATE_CLEAR: |
| 1113 | case CSR_STATE_SET: |
| 1114 | case CSR_CYCLE_TIME: |
| 1115 | case CSR_BUS_TIME: |
| 1116 | case CSR_BUSY_TIMEOUT: |
Clemens Ladisch | 506f1a3 | 2010-06-10 08:25:19 +0200 | [diff] [blame] | 1117 | if (tcode == TCODE_READ_QUADLET_REQUEST) |
Stefan Richter | 0fcff4e | 2010-06-12 20:35:52 +0200 | [diff] [blame] | 1118 | *data = cpu_to_be32(card->driver->read_csr(card, reg)); |
Clemens Ladisch | 506f1a3 | 2010-06-10 08:25:19 +0200 | [diff] [blame] | 1119 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
Stefan Richter | 0fcff4e | 2010-06-12 20:35:52 +0200 | [diff] [blame] | 1120 | card->driver->write_csr(card, reg, be32_to_cpu(*data)); |
Clemens Ladisch | 506f1a3 | 2010-06-10 08:25:19 +0200 | [diff] [blame] | 1121 | else |
| 1122 | rcode = RCODE_TYPE_ERROR; |
| 1123 | break; |
| 1124 | |
Clemens Ladisch | 446eba0 | 2010-06-10 08:25:46 +0200 | [diff] [blame] | 1125 | case CSR_RESET_START: |
Clemens Ladisch | 7e0e314f | 2010-06-10 08:37:15 +0200 | [diff] [blame] | 1126 | if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
Stefan Richter | 0fcff4e | 2010-06-12 20:35:52 +0200 | [diff] [blame] | 1127 | card->driver->write_csr(card, CSR_STATE_CLEAR, |
| 1128 | CSR_STATE_BIT_ABDICATE); |
Clemens Ladisch | 7e0e314f | 2010-06-10 08:37:15 +0200 | [diff] [blame] | 1129 | else |
Clemens Ladisch | 446eba0 | 2010-06-10 08:25:46 +0200 | [diff] [blame] | 1130 | rcode = RCODE_TYPE_ERROR; |
| 1131 | break; |
| 1132 | |
Clemens Ladisch | 8e4b50f | 2010-06-10 08:26:28 +0200 | [diff] [blame] | 1133 | case CSR_SPLIT_TIMEOUT_HI: |
| 1134 | if (tcode == TCODE_READ_QUADLET_REQUEST) { |
| 1135 | *data = cpu_to_be32(card->split_timeout_hi); |
| 1136 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { |
| 1137 | spin_lock_irqsave(&card->lock, flags); |
| 1138 | card->split_timeout_hi = be32_to_cpu(*data) & 7; |
| 1139 | update_split_timeout(card); |
| 1140 | spin_unlock_irqrestore(&card->lock, flags); |
| 1141 | } else { |
| 1142 | rcode = RCODE_TYPE_ERROR; |
| 1143 | } |
| 1144 | break; |
| 1145 | |
| 1146 | case CSR_SPLIT_TIMEOUT_LO: |
| 1147 | if (tcode == TCODE_READ_QUADLET_REQUEST) { |
| 1148 | *data = cpu_to_be32(card->split_timeout_lo); |
| 1149 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { |
| 1150 | spin_lock_irqsave(&card->lock, flags); |
| 1151 | card->split_timeout_lo = |
| 1152 | be32_to_cpu(*data) & 0xfff80000; |
| 1153 | update_split_timeout(card); |
| 1154 | spin_unlock_irqrestore(&card->lock, flags); |
| 1155 | } else { |
| 1156 | rcode = RCODE_TYPE_ERROR; |
| 1157 | } |
| 1158 | break; |
| 1159 | |
Clemens Ladisch | 3d1f46e | 2010-06-10 08:35:37 +0200 | [diff] [blame] | 1160 | case CSR_MAINT_UTILITY: |
| 1161 | if (tcode == TCODE_READ_QUADLET_REQUEST) |
| 1162 | *data = card->maint_utility_register; |
| 1163 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
| 1164 | card->maint_utility_register = *data; |
| 1165 | else |
| 1166 | rcode = RCODE_TYPE_ERROR; |
| 1167 | break; |
| 1168 | |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 1169 | case CSR_BROADCAST_CHANNEL: |
| 1170 | if (tcode == TCODE_READ_QUADLET_REQUEST) |
| 1171 | *data = cpu_to_be32(card->broadcast_channel); |
| 1172 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
| 1173 | card->broadcast_channel = |
| 1174 | (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | |
| 1175 | BROADCAST_CHANNEL_INITIAL; |
| 1176 | else |
| 1177 | rcode = RCODE_TYPE_ERROR; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1178 | break; |
| 1179 | |
| 1180 | case CSR_BUS_MANAGER_ID: |
| 1181 | case CSR_BANDWIDTH_AVAILABLE: |
| 1182 | case CSR_CHANNELS_AVAILABLE_HI: |
| 1183 | case CSR_CHANNELS_AVAILABLE_LO: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1184 | /* |
| 1185 | * FIXME: these are handled by the OHCI hardware and |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1186 | * the stack never sees these request. If we add |
| 1187 | * support for a new type of controller that doesn't |
| 1188 | * handle this in hardware we need to deal with these |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1189 | * transactions. |
| 1190 | */ |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1191 | BUG(); |
| 1192 | break; |
| 1193 | |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1194 | default: |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 1195 | rcode = RCODE_ADDRESS_ERROR; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1196 | break; |
| 1197 | } |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 1198 | |
| 1199 | fw_send_response(card, request, rcode); |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1200 | } |
| 1201 | |
| 1202 | static struct fw_address_handler registers = { |
| 1203 | .length = 0x400, |
| 1204 | .address_callback = handle_registers, |
| 1205 | }; |
| 1206 | |
Clemens Ladisch | f07d42a | 2012-05-24 19:28:58 +0200 | [diff] [blame] | 1207 | static void handle_low_memory(struct fw_card *card, struct fw_request *request, |
| 1208 | int tcode, int destination, int source, int generation, |
| 1209 | unsigned long long offset, void *payload, size_t length, |
| 1210 | void *callback_data) |
| 1211 | { |
| 1212 | /* |
| 1213 | * This catches requests not handled by the physical DMA unit, |
| 1214 | * i.e., wrong transaction types or unauthorized source nodes. |
| 1215 | */ |
| 1216 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 1217 | } |
| 1218 | |
| 1219 | static struct fw_address_handler low_memory = { |
| 1220 | .length = 0x000100000000ULL, |
| 1221 | .address_callback = handle_low_memory, |
| 1222 | }; |
| 1223 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1224 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 1225 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); |
| 1226 | MODULE_LICENSE("GPL"); |
| 1227 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 1228 | static const u32 vendor_textual_descriptor[] = { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1229 | /* textual descriptor leaf () */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 1230 | 0x00060000, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1231 | 0x00000000, |
| 1232 | 0x00000000, |
| 1233 | 0x4c696e75, /* L i n u */ |
| 1234 | 0x78204669, /* x F i */ |
| 1235 | 0x72657769, /* r e w i */ |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 1236 | 0x72650000, /* r e */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1237 | }; |
| 1238 | |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 1239 | static const u32 model_textual_descriptor[] = { |
| 1240 | /* model descriptor leaf () */ |
| 1241 | 0x00030000, |
| 1242 | 0x00000000, |
| 1243 | 0x00000000, |
| 1244 | 0x4a756a75, /* J u j u */ |
| 1245 | }; |
| 1246 | |
| 1247 | static struct fw_descriptor vendor_id_descriptor = { |
| 1248 | .length = ARRAY_SIZE(vendor_textual_descriptor), |
| 1249 | .immediate = 0x03d00d1e, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1250 | .key = 0x81000000, |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 1251 | .data = vendor_textual_descriptor, |
| 1252 | }; |
| 1253 | |
| 1254 | static struct fw_descriptor model_id_descriptor = { |
| 1255 | .length = ARRAY_SIZE(model_textual_descriptor), |
| 1256 | .immediate = 0x17000001, |
| 1257 | .key = 0x81000000, |
| 1258 | .data = model_textual_descriptor, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1259 | }; |
| 1260 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1261 | static int __init fw_core_init(void) |
| 1262 | { |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1263 | int ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1264 | |
Tejun Heo | 4e6b931 | 2013-07-30 08:40:23 -0400 | [diff] [blame] | 1265 | fw_workqueue = alloc_workqueue("firewire", WQ_MEM_RECLAIM, 0); |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 1266 | if (!fw_workqueue) |
Stefan Richter | 6ea9e7b | 2010-10-13 13:39:46 +0200 | [diff] [blame] | 1267 | return -ENOMEM; |
| 1268 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1269 | ret = bus_register(&fw_bus_type); |
Stefan Richter | 6ea9e7b | 2010-10-13 13:39:46 +0200 | [diff] [blame] | 1270 | if (ret < 0) { |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 1271 | destroy_workqueue(fw_workqueue); |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1272 | return ret; |
Stefan Richter | 6ea9e7b | 2010-10-13 13:39:46 +0200 | [diff] [blame] | 1273 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1274 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1275 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
| 1276 | if (fw_cdev_major < 0) { |
| 1277 | bus_unregister(&fw_bus_type); |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 1278 | destroy_workqueue(fw_workqueue); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1279 | return fw_cdev_major; |
| 1280 | } |
| 1281 | |
Stefan Richter | c490a6d | 2008-12-14 21:45:14 +0100 | [diff] [blame] | 1282 | fw_core_add_address_handler(&topology_map, &topology_map_region); |
| 1283 | fw_core_add_address_handler(®isters, ®isters_region); |
Clemens Ladisch | f07d42a | 2012-05-24 19:28:58 +0200 | [diff] [blame] | 1284 | fw_core_add_address_handler(&low_memory, &low_memory_region); |
Stefan Richter | c490a6d | 2008-12-14 21:45:14 +0100 | [diff] [blame] | 1285 | fw_core_add_descriptor(&vendor_id_descriptor); |
| 1286 | fw_core_add_descriptor(&model_id_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1287 | |
| 1288 | return 0; |
| 1289 | } |
| 1290 | |
| 1291 | static void __exit fw_core_cleanup(void) |
| 1292 | { |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1293 | unregister_chrdev(fw_cdev_major, "firewire"); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1294 | bus_unregister(&fw_bus_type); |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 1295 | destroy_workqueue(fw_workqueue); |
Stefan Richter | d6053e0 | 2008-11-24 20:40:00 +0100 | [diff] [blame] | 1296 | idr_destroy(&fw_device_idr); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1297 | } |
| 1298 | |
| 1299 | module_init(fw_core_init); |
| 1300 | module_exit(fw_core_cleanup); |