Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IEEE 1394 for Linux |
| 3 | * |
| 4 | * Core support: hpsb_packet management, packet handling and forwarding to |
| 5 | * highlevel or lowlevel code |
| 6 | * |
| 7 | * Copyright (C) 1999, 2000 Andreas E. Bombe |
| 8 | * 2002 Manfred Weihs <weihs@ict.tuwien.ac.at> |
| 9 | * |
| 10 | * This code is licensed under the GPL. See the file COPYING in the root |
| 11 | * directory of the kernel sources for details. |
| 12 | * |
| 13 | * |
| 14 | * Contributions: |
| 15 | * |
| 16 | * Manfred Weihs <weihs@ict.tuwien.ac.at> |
| 17 | * loopback functionality in hpsb_send_packet |
| 18 | * allow highlevel drivers to disable automatic response generation |
| 19 | * and to generate responses themselves (deferred) |
| 20 | * |
| 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/string.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/moduleparam.h> |
| 31 | #include <linux/bitops.h> |
| 32 | #include <linux/kdev_t.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <linux/suspend.h> |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 35 | #include <linux/kthread.h> |
Pieter Palmers | 3dc5ea9 | 2007-02-03 17:44:39 +0100 | [diff] [blame] | 36 | #include <linux/preempt.h> |
| 37 | #include <linux/time.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Pieter Palmers | 3dc5ea9 | 2007-02-03 17:44:39 +0100 | [diff] [blame] | 39 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/byteorder.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include "ieee1394_types.h" |
| 43 | #include "ieee1394.h" |
| 44 | #include "hosts.h" |
| 45 | #include "ieee1394_core.h" |
| 46 | #include "highlevel.h" |
| 47 | #include "ieee1394_transactions.h" |
| 48 | #include "csr.h" |
| 49 | #include "nodemgr.h" |
| 50 | #include "dma.h" |
| 51 | #include "iso.h" |
| 52 | #include "config_roms.h" |
| 53 | |
| 54 | /* |
| 55 | * Disable the nodemgr detection and config rom reading functionality. |
| 56 | */ |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 57 | static int disable_nodemgr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | module_param(disable_nodemgr, int, 0444); |
| 59 | MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality."); |
| 60 | |
| 61 | /* Disable Isochronous Resource Manager functionality */ |
| 62 | int hpsb_disable_irm = 0; |
Stefan Richter | 23e93f1 | 2006-03-28 20:03:34 -0500 | [diff] [blame] | 63 | module_param_named(disable_irm, hpsb_disable_irm, bool, 0444); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | MODULE_PARM_DESC(disable_irm, |
| 65 | "Disable Isochronous Resource Manager functionality."); |
| 66 | |
| 67 | /* We are GPL, so treat us special */ |
| 68 | MODULE_LICENSE("GPL"); |
| 69 | |
| 70 | /* Some globals used */ |
| 71 | const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" }; |
gregkh@suse.de | 7e25ab9 | 2005-03-23 09:53:36 -0800 | [diff] [blame] | 72 | struct class *hpsb_protocol_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG |
Jody McIntyre | db2fd66 | 2005-09-30 11:59:09 -0700 | [diff] [blame] | 75 | static void dump_packet(const char *text, quadlet_t *data, int size, int speed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
| 77 | int i; |
| 78 | |
| 79 | size /= 4; |
| 80 | size = (size > 4 ? 4 : size); |
| 81 | |
| 82 | printk(KERN_DEBUG "ieee1394: %s", text); |
Jody McIntyre | db2fd66 | 2005-09-30 11:59:09 -0700 | [diff] [blame] | 83 | if (speed > -1 && speed < 6) |
| 84 | printk(" at %s", hpsb_speedto_str[speed]); |
| 85 | printk(":"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | for (i = 0; i < size; i++) |
| 87 | printk(" %08x", data[i]); |
| 88 | printk("\n"); |
| 89 | } |
| 90 | #else |
Stefan Richter | 611aa19 | 2006-08-02 18:44:00 +0200 | [diff] [blame] | 91 | #define dump_packet(a,b,c,d) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #endif |
| 93 | |
| 94 | static void abort_requests(struct hpsb_host *host); |
| 95 | static void queue_packet_complete(struct hpsb_packet *packet); |
| 96 | |
| 97 | |
| 98 | /** |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 99 | * hpsb_set_packet_complete_task - set task that runs when a packet completes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | * @packet: the packet whose completion we want the task added to |
| 101 | * @routine: function to call |
| 102 | * @data: data (if any) to pass to the above function |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 103 | * |
| 104 | * Set the task that runs when a packet completes. You cannot call this more |
| 105 | * than once on a single packet before it is sent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | */ |
| 107 | void hpsb_set_packet_complete_task(struct hpsb_packet *packet, |
| 108 | void (*routine)(void *), void *data) |
| 109 | { |
| 110 | WARN_ON(packet->complete_routine != NULL); |
| 111 | packet->complete_routine = routine; |
| 112 | packet->complete_data = data; |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * hpsb_alloc_packet - allocate new packet structure |
| 118 | * @data_size: size of the data block to be allocated |
| 119 | * |
| 120 | * This function allocates, initializes and returns a new &struct hpsb_packet. |
| 121 | * It can be used in interrupt context. A header block is always included, its |
| 122 | * size is big enough to contain all possible 1394 headers. The data block is |
| 123 | * only allocated when @data_size is not zero. |
| 124 | * |
| 125 | * For packets for which responses will be received the @data_size has to be big |
| 126 | * enough to contain the response's data block since no further allocation |
| 127 | * occurs at response matching time. |
| 128 | * |
| 129 | * The packet's generation value will be set to the current generation number |
| 130 | * for ease of use. Remember to overwrite it with your own recorded generation |
| 131 | * number if you can not be sure that your code will not race with a bus reset. |
| 132 | * |
| 133 | * Return value: A pointer to a &struct hpsb_packet or NULL on allocation |
| 134 | * failure. |
| 135 | */ |
| 136 | struct hpsb_packet *hpsb_alloc_packet(size_t data_size) |
| 137 | { |
| 138 | struct hpsb_packet *packet = NULL; |
| 139 | struct sk_buff *skb; |
| 140 | |
| 141 | data_size = ((data_size + 3) & ~3); |
| 142 | |
| 143 | skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC); |
| 144 | if (skb == NULL) |
| 145 | return NULL; |
| 146 | |
| 147 | memset(skb->data, 0, data_size + sizeof(*packet)); |
| 148 | |
| 149 | packet = (struct hpsb_packet *)skb->data; |
| 150 | packet->skb = skb; |
| 151 | |
| 152 | packet->header = packet->embedded_header; |
| 153 | packet->state = hpsb_unused; |
| 154 | packet->generation = -1; |
| 155 | INIT_LIST_HEAD(&packet->driver_list); |
| 156 | atomic_set(&packet->refcnt, 1); |
| 157 | |
| 158 | if (data_size) { |
| 159 | packet->data = (quadlet_t *)(skb->data + sizeof(*packet)); |
| 160 | packet->data_size = data_size; |
| 161 | } |
| 162 | |
| 163 | return packet; |
| 164 | } |
| 165 | |
| 166 | |
| 167 | /** |
| 168 | * hpsb_free_packet - free packet and data associated with it |
| 169 | * @packet: packet to free (is NULL safe) |
| 170 | * |
| 171 | * This function will free packet->data and finally the packet itself. |
| 172 | */ |
| 173 | void hpsb_free_packet(struct hpsb_packet *packet) |
| 174 | { |
| 175 | if (packet && atomic_dec_and_test(&packet->refcnt)) { |
| 176 | BUG_ON(!list_empty(&packet->driver_list)); |
| 177 | kfree_skb(packet->skb); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 182 | /** |
| 183 | * hpsb_reset_bus - initiate bus reset on the given host |
| 184 | * @host: host controller whose bus to reset |
| 185 | * @type: one of enum reset_types |
| 186 | * |
| 187 | * Returns 1 if bus reset already in progress, 0 otherwise. |
| 188 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | int hpsb_reset_bus(struct hpsb_host *host, int type) |
| 190 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 191 | if (!host->in_bus_reset) { |
| 192 | host->driver->devctl(host, RESET_BUS, type); |
| 193 | return 0; |
| 194 | } else { |
| 195 | return 1; |
| 196 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
| 198 | |
Pieter Palmers | 3dc5ea9 | 2007-02-03 17:44:39 +0100 | [diff] [blame] | 199 | /** |
| 200 | * hpsb_read_cycle_timer - read cycle timer register and system time |
| 201 | * @host: host whose isochronous cycle timer register is read |
| 202 | * @cycle_timer: address of bitfield to return the register contents |
| 203 | * @local_time: address to return the system time |
| 204 | * |
| 205 | * The format of * @cycle_timer, is described in OHCI 1.1 clause 5.13. This |
| 206 | * format is also read from non-OHCI controllers. * @local_time contains the |
| 207 | * system time in microseconds since the Epoch, read at the moment when the |
| 208 | * cycle timer was read. |
| 209 | * |
| 210 | * Return value: 0 for success or error number otherwise. |
| 211 | */ |
| 212 | int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer, |
| 213 | u64 *local_time) |
| 214 | { |
| 215 | int ctr; |
| 216 | struct timeval tv; |
| 217 | unsigned long flags; |
| 218 | |
| 219 | if (!host || !cycle_timer || !local_time) |
| 220 | return -EINVAL; |
| 221 | |
| 222 | preempt_disable(); |
| 223 | local_irq_save(flags); |
| 224 | |
| 225 | ctr = host->driver->devctl(host, GET_CYCLE_COUNTER, 0); |
| 226 | if (ctr) |
| 227 | do_gettimeofday(&tv); |
| 228 | |
| 229 | local_irq_restore(flags); |
| 230 | preempt_enable(); |
| 231 | |
| 232 | if (!ctr) |
| 233 | return -EIO; |
| 234 | *cycle_timer = ctr; |
| 235 | *local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; |
| 236 | return 0; |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 239 | /** |
| 240 | * hpsb_bus_reset - notify a bus reset to the core |
| 241 | * |
| 242 | * For host driver module usage. Safe to use in interrupt context, although |
| 243 | * quite complex; so you may want to run it in the bottom rather than top half. |
| 244 | * |
| 245 | * Returns 1 if bus reset already in progress, 0 otherwise. |
| 246 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | int hpsb_bus_reset(struct hpsb_host *host) |
| 248 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 249 | if (host->in_bus_reset) { |
| 250 | HPSB_NOTICE("%s called while bus reset already in progress", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | __FUNCTION__); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 252 | return 1; |
| 253 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 255 | abort_requests(host); |
| 256 | host->in_bus_reset = 1; |
| 257 | host->irm_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | host->is_irm = 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 259 | host->busmgr_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | host->is_busmgr = 0; |
| 261 | host->is_cycmst = 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 262 | host->node_count = 0; |
| 263 | host->selfid_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 265 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | |
| 269 | /* |
| 270 | * Verify num_of_selfids SelfIDs and return number of nodes. Return zero in |
| 271 | * case verification failed. |
| 272 | */ |
| 273 | static int check_selfids(struct hpsb_host *host) |
| 274 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 275 | int nodeid = -1; |
| 276 | int rest_of_selfids = host->selfid_count; |
| 277 | struct selfid *sid = (struct selfid *)host->topology_map; |
| 278 | struct ext_selfid *esid; |
| 279 | int esid_seq = 23; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | host->nodes_active = 0; |
| 282 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 283 | while (rest_of_selfids--) { |
| 284 | if (!sid->extended) { |
| 285 | nodeid++; |
| 286 | esid_seq = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 288 | if (sid->phy_id != nodeid) { |
| 289 | HPSB_INFO("SelfIDs failed monotony check with " |
| 290 | "%d", sid->phy_id); |
| 291 | return 0; |
| 292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | if (sid->link_active) { |
| 295 | host->nodes_active++; |
| 296 | if (sid->contender) |
| 297 | host->irm_id = LOCAL_BUS | sid->phy_id; |
| 298 | } |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 299 | } else { |
| 300 | esid = (struct ext_selfid *)sid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 302 | if ((esid->phy_id != nodeid) |
| 303 | || (esid->seq_nr != esid_seq)) { |
| 304 | HPSB_INFO("SelfIDs failed monotony check with " |
| 305 | "%d/%d", esid->phy_id, esid->seq_nr); |
| 306 | return 0; |
| 307 | } |
| 308 | esid_seq++; |
| 309 | } |
| 310 | sid++; |
| 311 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 313 | esid = (struct ext_selfid *)(sid - 1); |
| 314 | while (esid->extended) { |
| 315 | if ((esid->porta == SELFID_PORT_PARENT) || |
Stefan Richter | d775846 | 2005-12-01 18:51:56 -0500 | [diff] [blame] | 316 | (esid->portb == SELFID_PORT_PARENT) || |
| 317 | (esid->portc == SELFID_PORT_PARENT) || |
| 318 | (esid->portd == SELFID_PORT_PARENT) || |
| 319 | (esid->porte == SELFID_PORT_PARENT) || |
| 320 | (esid->portf == SELFID_PORT_PARENT) || |
| 321 | (esid->portg == SELFID_PORT_PARENT) || |
| 322 | (esid->porth == SELFID_PORT_PARENT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | HPSB_INFO("SelfIDs failed root check on " |
| 324 | "extended SelfID"); |
| 325 | return 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 326 | } |
| 327 | esid--; |
| 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 330 | sid = (struct selfid *)esid; |
Stefan Richter | d775846 | 2005-12-01 18:51:56 -0500 | [diff] [blame] | 331 | if ((sid->port0 == SELFID_PORT_PARENT) || |
| 332 | (sid->port1 == SELFID_PORT_PARENT) || |
| 333 | (sid->port2 == SELFID_PORT_PARENT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | HPSB_INFO("SelfIDs failed root check"); |
| 335 | return 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | host->node_count = nodeid + 1; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 339 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | static void build_speed_map(struct hpsb_host *host, int nodecount) |
| 343 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | u8 cldcnt[nodecount]; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 345 | u8 *map = host->speed_map; |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 346 | u8 *speedcap = host->speed; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 347 | struct selfid *sid; |
| 348 | struct ext_selfid *esid; |
| 349 | int i, j, n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 351 | for (i = 0; i < (nodecount * 64); i += 64) { |
| 352 | for (j = 0; j < nodecount; j++) { |
| 353 | map[i+j] = IEEE1394_SPEED_MAX; |
| 354 | } |
| 355 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 357 | for (i = 0; i < nodecount; i++) { |
| 358 | cldcnt[i] = 0; |
| 359 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 361 | /* find direct children count and speed */ |
| 362 | for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1], |
| 363 | n = nodecount - 1; |
| 364 | (void *)sid >= (void *)host->topology_map; sid--) { |
| 365 | if (sid->extended) { |
| 366 | esid = (struct ext_selfid *)sid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Stefan Richter | d775846 | 2005-12-01 18:51:56 -0500 | [diff] [blame] | 368 | if (esid->porta == SELFID_PORT_CHILD) cldcnt[n]++; |
| 369 | if (esid->portb == SELFID_PORT_CHILD) cldcnt[n]++; |
| 370 | if (esid->portc == SELFID_PORT_CHILD) cldcnt[n]++; |
| 371 | if (esid->portd == SELFID_PORT_CHILD) cldcnt[n]++; |
| 372 | if (esid->porte == SELFID_PORT_CHILD) cldcnt[n]++; |
| 373 | if (esid->portf == SELFID_PORT_CHILD) cldcnt[n]++; |
| 374 | if (esid->portg == SELFID_PORT_CHILD) cldcnt[n]++; |
| 375 | if (esid->porth == SELFID_PORT_CHILD) cldcnt[n]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } else { |
Stefan Richter | d775846 | 2005-12-01 18:51:56 -0500 | [diff] [blame] | 377 | if (sid->port0 == SELFID_PORT_CHILD) cldcnt[n]++; |
| 378 | if (sid->port1 == SELFID_PORT_CHILD) cldcnt[n]++; |
| 379 | if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 381 | speedcap[n] = sid->speed; |
| 382 | n--; |
| 383 | } |
| 384 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 386 | /* set self mapping */ |
| 387 | for (i = 0; i < nodecount; i++) { |
| 388 | map[64*i + i] = speedcap[i]; |
| 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 391 | /* fix up direct children count to total children count; |
| 392 | * also fix up speedcaps for sibling and parent communication */ |
| 393 | for (i = 1; i < nodecount; i++) { |
| 394 | for (j = cldcnt[i], n = i - 1; j > 0; j--) { |
| 395 | cldcnt[i] += cldcnt[n]; |
| 396 | speedcap[n] = min(speedcap[n], speedcap[i]); |
| 397 | n -= cldcnt[n] + 1; |
| 398 | } |
| 399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 401 | for (n = 0; n < nodecount; n++) { |
| 402 | for (i = n - cldcnt[n]; i <= n; i++) { |
| 403 | for (j = 0; j < (n - cldcnt[n]); j++) { |
| 404 | map[j*64 + i] = map[i*64 + j] = |
| 405 | min(map[i*64 + j], speedcap[n]); |
| 406 | } |
| 407 | for (j = n + 1; j < nodecount; j++) { |
| 408 | map[j*64 + i] = map[i*64 + j] = |
| 409 | min(map[i*64 + j], speedcap[n]); |
| 410 | } |
| 411 | } |
| 412 | } |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 413 | |
Stefan Richter | 433a87d | 2006-07-03 12:02:27 -0400 | [diff] [blame] | 414 | #if SELFID_SPEED_UNKNOWN != IEEE1394_SPEED_MAX |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 415 | /* assume maximum speed for 1394b PHYs, nodemgr will correct it */ |
| 416 | for (n = 0; n < nodecount; n++) |
Stefan Richter | 433a87d | 2006-07-03 12:02:27 -0400 | [diff] [blame] | 417 | if (speedcap[n] == SELFID_SPEED_UNKNOWN) |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 418 | speedcap[n] = IEEE1394_SPEED_MAX; |
Stefan Richter | 433a87d | 2006-07-03 12:02:27 -0400 | [diff] [blame] | 419 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 423 | /** |
| 424 | * hpsb_selfid_received - hand over received selfid packet to the core |
| 425 | * |
| 426 | * For host driver module usage. Safe to use in interrupt context. |
| 427 | * |
| 428 | * The host driver should have done a successful complement check (second |
| 429 | * quadlet is complement of first) beforehand. |
| 430 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid) |
| 432 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 433 | if (host->in_bus_reset) { |
| 434 | HPSB_VERBOSE("Including SelfID 0x%x", sid); |
| 435 | host->topology_map[host->selfid_count++] = sid; |
| 436 | } else { |
| 437 | HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | sid, NODEID_TO_BUS(host->node_id)); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 442 | /** |
| 443 | * hpsb_selfid_complete - notify completion of SelfID stage to the core |
| 444 | * |
| 445 | * For host driver module usage. Safe to use in interrupt context, although |
| 446 | * quite complex; so you may want to run it in the bottom rather than top half. |
| 447 | * |
| 448 | * Notify completion of SelfID stage to the core and report new physical ID |
| 449 | * and whether host is root now. |
| 450 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot) |
| 452 | { |
| 453 | if (!host->in_bus_reset) |
| 454 | HPSB_NOTICE("SelfID completion called outside of bus reset!"); |
| 455 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 456 | host->node_id = LOCAL_BUS | phyid; |
| 457 | host->is_root = isroot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 459 | if (!check_selfids(host)) { |
| 460 | if (host->reset_retries++ < 20) { |
| 461 | /* selfid stage did not complete without error */ |
| 462 | HPSB_NOTICE("Error in SelfID stage, resetting"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | host->in_bus_reset = 0; |
| 464 | /* this should work from ohci1394 now... */ |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 465 | hpsb_reset_bus(host, LONG_RESET); |
| 466 | return; |
| 467 | } else { |
| 468 | HPSB_NOTICE("Stopping out-of-control reset loop"); |
| 469 | HPSB_NOTICE("Warning - topology map and speed map will not be valid"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | host->reset_retries = 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 471 | } |
| 472 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | host->reset_retries = 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 474 | build_speed_map(host, host->node_count); |
| 475 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | HPSB_VERBOSE("selfid_complete called with successful SelfID stage " |
| 478 | "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id); |
| 479 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 480 | /* irm_id is kept up to date by check_selfids() */ |
| 481 | if (host->irm_id == host->node_id) { |
| 482 | host->is_irm = 1; |
| 483 | } else { |
| 484 | host->is_busmgr = 0; |
| 485 | host->is_irm = 0; |
| 486 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 488 | if (isroot) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | host->driver->devctl(host, ACT_CYCLE_MASTER, 1); |
| 490 | host->is_cycmst = 1; |
| 491 | } |
| 492 | atomic_inc(&host->generation); |
| 493 | host->in_bus_reset = 0; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 494 | highlevel_host_reset(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 497 | /** |
| 498 | * hpsb_packet_sent - notify core of sending a packet |
| 499 | * |
| 500 | * For host driver module usage. Safe to call from within a transmit packet |
| 501 | * routine. |
| 502 | * |
| 503 | * Notify core of sending a packet. Ackcode is the ack code returned for async |
| 504 | * transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE |
| 505 | * for other cases (internal errors that don't justify a panic). |
| 506 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet, |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 508 | int ackcode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | unsigned long flags; |
| 511 | |
| 512 | spin_lock_irqsave(&host->pending_packet_queue.lock, flags); |
| 513 | |
| 514 | packet->ack_code = ackcode; |
| 515 | |
| 516 | if (packet->no_waiter || packet->state == hpsb_complete) { |
| 517 | /* if packet->no_waiter, must not have a tlabel allocated */ |
| 518 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
| 519 | hpsb_free_packet(packet); |
| 520 | return; |
| 521 | } |
| 522 | |
| 523 | atomic_dec(&packet->refcnt); /* drop HC's reference */ |
| 524 | /* here the packet must be on the host->pending_packet_queue */ |
| 525 | |
| 526 | if (ackcode != ACK_PENDING || !packet->expect_response) { |
| 527 | packet->state = hpsb_complete; |
| 528 | __skb_unlink(packet->skb, &host->pending_packet_queue); |
| 529 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
| 530 | queue_packet_complete(packet); |
| 531 | return; |
| 532 | } |
| 533 | |
| 534 | packet->state = hpsb_pending; |
| 535 | packet->sendtime = jiffies; |
| 536 | |
| 537 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
| 538 | |
| 539 | mod_timer(&host->timeout, jiffies + host->timeout_interval); |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * hpsb_send_phy_config - transmit a PHY configuration packet on the bus |
| 544 | * @host: host that PHY config packet gets sent through |
| 545 | * @rootid: root whose force_root bit should get set (-1 = don't set force_root) |
| 546 | * @gapcnt: gap count value to set (-1 = don't set gap count) |
| 547 | * |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 548 | * This function sends a PHY config packet on the bus through the specified |
| 549 | * host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | * |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 551 | * Return value: 0 for success or negative error number otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | */ |
| 553 | int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt) |
| 554 | { |
| 555 | struct hpsb_packet *packet; |
Stefan Richter | 546513f | 2005-12-01 18:52:01 -0500 | [diff] [blame] | 556 | quadlet_t d = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | int retval = 0; |
| 558 | |
| 559 | if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 || |
| 560 | (rootid == -1 && gapcnt == -1)) { |
| 561 | HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d", |
| 562 | rootid, gapcnt); |
| 563 | return -EINVAL; |
| 564 | } |
| 565 | |
Stefan Richter | 546513f | 2005-12-01 18:52:01 -0500 | [diff] [blame] | 566 | if (rootid != -1) |
| 567 | d |= PHYPACKET_PHYCONFIG_R | rootid << PHYPACKET_PORT_SHIFT; |
| 568 | if (gapcnt != -1) |
| 569 | d |= PHYPACKET_PHYCONFIG_T | gapcnt << PHYPACKET_GAPCOUNT_SHIFT; |
| 570 | |
| 571 | packet = hpsb_make_phypacket(host, d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (!packet) |
| 573 | return -ENOMEM; |
| 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | packet->generation = get_hpsb_generation(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | retval = hpsb_send_packet_and_wait(packet); |
| 577 | hpsb_free_packet(packet); |
| 578 | |
| 579 | return retval; |
| 580 | } |
| 581 | |
| 582 | /** |
| 583 | * hpsb_send_packet - transmit a packet on the bus |
| 584 | * @packet: packet to send |
| 585 | * |
| 586 | * The packet is sent through the host specified in the packet->host field. |
| 587 | * Before sending, the packet's transmit speed is automatically determined |
| 588 | * using the local speed map when it is an async, non-broadcast packet. |
| 589 | * |
| 590 | * Possibilities for failure are that host is either not initialized, in bus |
| 591 | * reset, the packet's generation number doesn't match the current generation |
| 592 | * number or the host reports a transmit error. |
| 593 | * |
| 594 | * Return value: 0 on success, negative errno on failure. |
| 595 | */ |
| 596 | int hpsb_send_packet(struct hpsb_packet *packet) |
| 597 | { |
| 598 | struct hpsb_host *host = packet->host; |
| 599 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 600 | if (host->is_shutdown) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | return -EINVAL; |
| 602 | if (host->in_bus_reset || |
| 603 | (packet->generation != get_hpsb_generation(host))) |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 604 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 606 | packet->state = hpsb_queued; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | /* This just seems silly to me */ |
| 609 | WARN_ON(packet->no_waiter && packet->expect_response); |
| 610 | |
| 611 | if (!packet->no_waiter || packet->expect_response) { |
| 612 | atomic_inc(&packet->refcnt); |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 613 | /* Set the initial "sendtime" to 10 seconds from now, to |
| 614 | prevent premature expiry. If a packet takes more than |
| 615 | 10 seconds to hit the wire, we have bigger problems :) */ |
Jody McIntyre | 6262d06 | 2005-05-16 21:54:05 -0700 | [diff] [blame] | 616 | packet->sendtime = jiffies + 10 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | skb_queue_tail(&host->pending_packet_queue, packet->skb); |
| 618 | } |
| 619 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 620 | if (packet->node_id == host->node_id) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | /* it is a local request, so handle it locally */ |
| 622 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 623 | quadlet_t *data; |
| 624 | size_t size = packet->data_size + packet->header_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 626 | data = kmalloc(size, GFP_ATOMIC); |
| 627 | if (!data) { |
| 628 | HPSB_ERR("unable to allocate memory for concatenating header and data"); |
| 629 | return -ENOMEM; |
| 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 632 | memcpy(data, packet->header, packet->header_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 634 | if (packet->data_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size); |
| 636 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 637 | dump_packet("send packet local", packet->header, packet->header_size, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 639 | hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE); |
| 640 | hpsb_packet_received(host, data, size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 642 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 644 | return 0; |
| 645 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 647 | if (packet->type == hpsb_async && |
| 648 | NODEID_TO_NODE(packet->node_id) != ALL_NODES) |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 649 | packet->speed_code = |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 650 | host->speed[NODEID_TO_NODE(packet->node_id)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 652 | dump_packet("send packet", packet->header, packet->header_size, packet->speed_code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 654 | return host->driver->transmit_packet(host, packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | /* We could just use complete() directly as the packet complete |
| 658 | * callback, but this is more typesafe, in the sense that we get a |
| 659 | * compiler error if the prototype for complete() changes. */ |
| 660 | |
| 661 | static void complete_packet(void *data) |
| 662 | { |
| 663 | complete((struct completion *) data); |
| 664 | } |
| 665 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 666 | /** |
| 667 | * hpsb_send_packet_and_wait - enqueue packet, block until transaction completes |
| 668 | * @packet: packet to send |
| 669 | * |
| 670 | * Return value: 0 on success, negative errno on failure. |
| 671 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | int hpsb_send_packet_and_wait(struct hpsb_packet *packet) |
| 673 | { |
| 674 | struct completion done; |
| 675 | int retval; |
| 676 | |
| 677 | init_completion(&done); |
| 678 | hpsb_set_packet_complete_task(packet, complete_packet, &done); |
| 679 | retval = hpsb_send_packet(packet); |
| 680 | if (retval == 0) |
| 681 | wait_for_completion(&done); |
| 682 | |
| 683 | return retval; |
| 684 | } |
| 685 | |
| 686 | static void send_packet_nocare(struct hpsb_packet *packet) |
| 687 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 688 | if (hpsb_send_packet(packet) < 0) { |
| 689 | hpsb_free_packet(packet); |
| 690 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
| 693 | |
| 694 | static void handle_packet_response(struct hpsb_host *host, int tcode, |
| 695 | quadlet_t *data, size_t size) |
| 696 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 697 | struct hpsb_packet *packet = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | struct sk_buff *skb; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 699 | int tcode_match = 0; |
| 700 | int tlabel; |
| 701 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 703 | tlabel = (data[0] >> 10) & 0x3f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
| 705 | spin_lock_irqsave(&host->pending_packet_queue.lock, flags); |
| 706 | |
| 707 | skb_queue_walk(&host->pending_packet_queue, skb) { |
| 708 | packet = (struct hpsb_packet *)skb->data; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 709 | if ((packet->tlabel == tlabel) |
| 710 | && (packet->node_id == (data[1] >> 16))){ |
| 711 | break; |
| 712 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | packet = NULL; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 715 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | if (packet == NULL) { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 718 | HPSB_DEBUG("unsolicited response packet received - no tlabel match"); |
| 719 | dump_packet("contents", data, 16, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 721 | return; |
| 722 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 724 | switch (packet->tcode) { |
| 725 | case TCODE_WRITEQ: |
| 726 | case TCODE_WRITEB: |
| 727 | if (tcode != TCODE_WRITE_RESPONSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | break; |
| 729 | tcode_match = 1; |
| 730 | memcpy(packet->header, data, 12); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 731 | break; |
| 732 | case TCODE_READQ: |
| 733 | if (tcode != TCODE_READQ_RESPONSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | break; |
| 735 | tcode_match = 1; |
| 736 | memcpy(packet->header, data, 16); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 737 | break; |
| 738 | case TCODE_READB: |
| 739 | if (tcode != TCODE_READB_RESPONSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | break; |
| 741 | tcode_match = 1; |
| 742 | BUG_ON(packet->skb->len - sizeof(*packet) < size - 16); |
| 743 | memcpy(packet->header, data, 16); |
| 744 | memcpy(packet->data, data + 4, size - 16); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 745 | break; |
| 746 | case TCODE_LOCK_REQUEST: |
| 747 | if (tcode != TCODE_LOCK_RESPONSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | break; |
| 749 | tcode_match = 1; |
| 750 | size = min((size - 16), (size_t)8); |
| 751 | BUG_ON(packet->skb->len - sizeof(*packet) < size); |
| 752 | memcpy(packet->header, data, 16); |
| 753 | memcpy(packet->data, data + 4, size); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 754 | break; |
| 755 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 757 | if (!tcode_match) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 759 | HPSB_INFO("unsolicited response packet received - tcode mismatch"); |
| 760 | dump_packet("contents", data, 16, -1); |
| 761 | return; |
| 762 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 764 | __skb_unlink(skb, &host->pending_packet_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | if (packet->state == hpsb_queued) { |
| 767 | packet->sendtime = jiffies; |
| 768 | packet->ack_code = ACK_PENDING; |
| 769 | } |
| 770 | |
| 771 | packet->state = hpsb_complete; |
| 772 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
| 773 | |
| 774 | queue_packet_complete(packet); |
| 775 | } |
| 776 | |
| 777 | |
| 778 | static struct hpsb_packet *create_reply_packet(struct hpsb_host *host, |
| 779 | quadlet_t *data, size_t dsize) |
| 780 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 781 | struct hpsb_packet *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 783 | p = hpsb_alloc_packet(dsize); |
| 784 | if (unlikely(p == NULL)) { |
| 785 | /* FIXME - send data_error response */ |
| 786 | return NULL; |
| 787 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 789 | p->type = hpsb_async; |
| 790 | p->state = hpsb_unused; |
| 791 | p->host = host; |
| 792 | p->node_id = data[1] >> 16; |
| 793 | p->tlabel = (data[0] >> 10) & 0x3f; |
| 794 | p->no_waiter = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
| 796 | p->generation = get_hpsb_generation(host); |
| 797 | |
| 798 | if (dsize % 4) |
| 799 | p->data[dsize / 4] = 0; |
| 800 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 801 | return p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | #define PREP_ASYNC_HEAD_RCODE(tc) \ |
| 805 | packet->tcode = tc; \ |
| 806 | packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \ |
| 807 | | (1 << 8) | (tc << 4); \ |
| 808 | packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \ |
| 809 | packet->header[2] = 0 |
| 810 | |
| 811 | static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode, |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 812 | quadlet_t data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | { |
| 814 | PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE); |
| 815 | packet->header[3] = data; |
| 816 | packet->header_size = 16; |
| 817 | packet->data_size = 0; |
| 818 | } |
| 819 | |
| 820 | static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode, |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 821 | int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | { |
| 823 | if (rcode != RCODE_COMPLETE) |
| 824 | length = 0; |
| 825 | |
| 826 | PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE); |
| 827 | packet->header[3] = length << 16; |
| 828 | packet->header_size = 16; |
| 829 | packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0); |
| 830 | } |
| 831 | |
| 832 | static void fill_async_write_resp(struct hpsb_packet *packet, int rcode) |
| 833 | { |
| 834 | PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE); |
| 835 | packet->header[2] = 0; |
| 836 | packet->header_size = 12; |
| 837 | packet->data_size = 0; |
| 838 | } |
| 839 | |
| 840 | static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode, |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 841 | int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
| 843 | if (rcode != RCODE_COMPLETE) |
| 844 | length = 0; |
| 845 | |
| 846 | PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE); |
| 847 | packet->header[3] = (length << 16) | extcode; |
| 848 | packet->header_size = 16; |
| 849 | packet->data_size = length; |
| 850 | } |
| 851 | |
| 852 | #define PREP_REPLY_PACKET(length) \ |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 853 | packet = create_reply_packet(host, data, length); \ |
| 854 | if (packet == NULL) break |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | static void handle_incoming_packet(struct hpsb_host *host, int tcode, |
| 857 | quadlet_t *data, size_t size, int write_acked) |
| 858 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 859 | struct hpsb_packet *packet; |
| 860 | int length, rcode, extcode; |
| 861 | quadlet_t buffer; |
| 862 | nodeid_t source = data[1] >> 16; |
| 863 | nodeid_t dest = data[0] >> 16; |
| 864 | u16 flags = (u16) data[0]; |
| 865 | u64 addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 867 | /* big FIXME - no error checking is done for an out of bounds length */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 869 | switch (tcode) { |
| 870 | case TCODE_WRITEQ: |
| 871 | addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| 872 | rcode = highlevel_write(host, source, dest, data+3, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | addr, 4, flags); |
| 874 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 875 | if (!write_acked |
| 876 | && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK) |
| 877 | && (rcode >= 0)) { |
| 878 | /* not a broadcast write, reply */ |
| 879 | PREP_REPLY_PACKET(0); |
| 880 | fill_async_write_resp(packet, rcode); |
| 881 | send_packet_nocare(packet); |
| 882 | } |
| 883 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 885 | case TCODE_WRITEB: |
| 886 | addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| 887 | rcode = highlevel_write(host, source, dest, data+4, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | addr, data[3]>>16, flags); |
| 889 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 890 | if (!write_acked |
| 891 | && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK) |
| 892 | && (rcode >= 0)) { |
| 893 | /* not a broadcast write, reply */ |
| 894 | PREP_REPLY_PACKET(0); |
| 895 | fill_async_write_resp(packet, rcode); |
| 896 | send_packet_nocare(packet); |
| 897 | } |
| 898 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 900 | case TCODE_READQ: |
| 901 | addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| 902 | rcode = highlevel_read(host, source, &buffer, addr, 4, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 904 | if (rcode >= 0) { |
| 905 | PREP_REPLY_PACKET(0); |
| 906 | fill_async_readquad_resp(packet, rcode, buffer); |
| 907 | send_packet_nocare(packet); |
| 908 | } |
| 909 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 911 | case TCODE_READB: |
| 912 | length = data[3] >> 16; |
| 913 | PREP_REPLY_PACKET(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 915 | addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| 916 | rcode = highlevel_read(host, source, packet->data, addr, |
| 917 | length, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 919 | if (rcode >= 0) { |
| 920 | fill_async_readblock_resp(packet, rcode, length); |
| 921 | send_packet_nocare(packet); |
| 922 | } else { |
| 923 | hpsb_free_packet(packet); |
| 924 | } |
| 925 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 927 | case TCODE_LOCK_REQUEST: |
| 928 | length = data[3] >> 16; |
| 929 | extcode = data[3] & 0xffff; |
| 930 | addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 932 | PREP_REPLY_PACKET(8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 934 | if ((extcode == 0) || (extcode >= 7)) { |
| 935 | /* let switch default handle error */ |
| 936 | length = 0; |
| 937 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 939 | switch (length) { |
| 940 | case 4: |
| 941 | rcode = highlevel_lock(host, source, packet->data, addr, |
| 942 | data[4], 0, extcode,flags); |
| 943 | fill_async_lock_resp(packet, rcode, extcode, 4); |
| 944 | break; |
| 945 | case 8: |
| 946 | if ((extcode != EXTCODE_FETCH_ADD) |
| 947 | && (extcode != EXTCODE_LITTLE_ADD)) { |
| 948 | rcode = highlevel_lock(host, source, |
| 949 | packet->data, addr, |
| 950 | data[5], data[4], |
| 951 | extcode, flags); |
| 952 | fill_async_lock_resp(packet, rcode, extcode, 4); |
| 953 | } else { |
| 954 | rcode = highlevel_lock64(host, source, |
| 955 | (octlet_t *)packet->data, addr, |
| 956 | *(octlet_t *)(data + 4), 0ULL, |
| 957 | extcode, flags); |
| 958 | fill_async_lock_resp(packet, rcode, extcode, 8); |
| 959 | } |
| 960 | break; |
| 961 | case 16: |
| 962 | rcode = highlevel_lock64(host, source, |
| 963 | (octlet_t *)packet->data, addr, |
| 964 | *(octlet_t *)(data + 6), |
| 965 | *(octlet_t *)(data + 4), |
| 966 | extcode, flags); |
| 967 | fill_async_lock_resp(packet, rcode, extcode, 8); |
| 968 | break; |
| 969 | default: |
| 970 | rcode = RCODE_TYPE_ERROR; |
| 971 | fill_async_lock_resp(packet, rcode, |
| 972 | extcode, 0); |
| 973 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 975 | if (rcode >= 0) { |
| 976 | send_packet_nocare(packet); |
| 977 | } else { |
| 978 | hpsb_free_packet(packet); |
| 979 | } |
| 980 | break; |
| 981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
| 983 | } |
| 984 | #undef PREP_REPLY_PACKET |
| 985 | |
Stefan Richter | afd6546 | 2007-03-05 03:06:23 +0100 | [diff] [blame] | 986 | /** |
| 987 | * hpsb_packet_received - hand over received packet to the core |
| 988 | * |
| 989 | * For host driver module usage. |
| 990 | * |
| 991 | * The contents of data are expected to be the full packet but with the CRCs |
| 992 | * left out (data block follows header immediately), with the header (i.e. the |
| 993 | * first four quadlets) in machine byte order and the data block in big endian. |
| 994 | * *@data can be safely overwritten after this call. |
| 995 | * |
| 996 | * If the packet is a write request, @write_acked is to be set to true if it was |
| 997 | * ack_complete'd already, false otherwise. This argument is ignored for any |
| 998 | * other packet type. |
| 999 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size, |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1001 | int write_acked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | { |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1003 | int tcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1005 | if (host->in_bus_reset) { |
| 1006 | HPSB_INFO("received packet during reset; ignoring"); |
| 1007 | return; |
| 1008 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1010 | dump_packet("received packet", data, size, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1012 | tcode = (data[0] >> 4) & 0xf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1014 | switch (tcode) { |
| 1015 | case TCODE_WRITE_RESPONSE: |
| 1016 | case TCODE_READQ_RESPONSE: |
| 1017 | case TCODE_READB_RESPONSE: |
| 1018 | case TCODE_LOCK_RESPONSE: |
| 1019 | handle_packet_response(host, tcode, data, size); |
| 1020 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1022 | case TCODE_WRITEQ: |
| 1023 | case TCODE_WRITEB: |
| 1024 | case TCODE_READQ: |
| 1025 | case TCODE_READB: |
| 1026 | case TCODE_LOCK_REQUEST: |
| 1027 | handle_incoming_packet(host, tcode, data, size, write_acked); |
| 1028 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | |
| 1030 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1031 | case TCODE_ISO_DATA: |
| 1032 | highlevel_iso_receive(host, data, size); |
| 1033 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1035 | case TCODE_CYCLE_START: |
| 1036 | /* simply ignore this packet if it is passed on */ |
| 1037 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1039 | default: |
| 1040 | HPSB_NOTICE("received packet with bogus transaction code %d", |
| 1041 | tcode); |
| 1042 | break; |
| 1043 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | static void abort_requests(struct hpsb_host *host) |
| 1048 | { |
| 1049 | struct hpsb_packet *packet; |
| 1050 | struct sk_buff *skb; |
| 1051 | |
| 1052 | host->driver->devctl(host, CANCEL_REQUESTS, 0); |
| 1053 | |
| 1054 | while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) { |
| 1055 | packet = (struct hpsb_packet *)skb->data; |
| 1056 | |
| 1057 | packet->state = hpsb_complete; |
| 1058 | packet->ack_code = ACKX_ABORTED; |
| 1059 | queue_packet_complete(packet); |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | void abort_timedouts(unsigned long __opaque) |
| 1064 | { |
| 1065 | struct hpsb_host *host = (struct hpsb_host *)__opaque; |
| 1066 | unsigned long flags; |
| 1067 | struct hpsb_packet *packet; |
| 1068 | struct sk_buff *skb; |
| 1069 | unsigned long expire; |
| 1070 | |
| 1071 | spin_lock_irqsave(&host->csr.lock, flags); |
| 1072 | expire = host->csr.expire; |
| 1073 | spin_unlock_irqrestore(&host->csr.lock, flags); |
| 1074 | |
| 1075 | /* Hold the lock around this, since we aren't dequeuing all |
| 1076 | * packets, just ones we need. */ |
| 1077 | spin_lock_irqsave(&host->pending_packet_queue.lock, flags); |
| 1078 | |
| 1079 | while (!skb_queue_empty(&host->pending_packet_queue)) { |
| 1080 | skb = skb_peek(&host->pending_packet_queue); |
| 1081 | |
| 1082 | packet = (struct hpsb_packet *)skb->data; |
| 1083 | |
| 1084 | if (time_before(packet->sendtime + expire, jiffies)) { |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 1085 | __skb_unlink(skb, &host->pending_packet_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | packet->state = hpsb_complete; |
| 1087 | packet->ack_code = ACKX_TIMEOUT; |
| 1088 | queue_packet_complete(packet); |
| 1089 | } else { |
| 1090 | /* Since packets are added to the tail, the oldest |
| 1091 | * ones are first, always. When we get to one that |
| 1092 | * isn't timed out, the rest aren't either. */ |
| 1093 | break; |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | if (!skb_queue_empty(&host->pending_packet_queue)) |
| 1098 | mod_timer(&host->timeout, jiffies + host->timeout_interval); |
| 1099 | |
| 1100 | spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); |
| 1101 | } |
| 1102 | |
| 1103 | |
| 1104 | /* Kernel thread and vars, which handles packets that are completed. Only |
| 1105 | * packets that have a "complete" function are sent here. This way, the |
| 1106 | * completion is run out of kernel context, and doesn't block the rest of |
| 1107 | * the stack. */ |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1108 | static struct task_struct *khpsbpkt_thread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | static struct sk_buff_head hpsbpkt_queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | |
| 1111 | static void queue_packet_complete(struct hpsb_packet *packet) |
| 1112 | { |
| 1113 | if (packet->no_waiter) { |
| 1114 | hpsb_free_packet(packet); |
| 1115 | return; |
| 1116 | } |
| 1117 | if (packet->complete_routine != NULL) { |
| 1118 | skb_queue_tail(&hpsbpkt_queue, packet->skb); |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1119 | wake_up_process(khpsbpkt_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 1121 | return; |
| 1122 | } |
| 1123 | |
| 1124 | static int hpsbpkt_thread(void *__hi) |
| 1125 | { |
| 1126 | struct sk_buff *skb; |
| 1127 | struct hpsb_packet *packet; |
| 1128 | void (*complete_routine)(void*); |
| 1129 | void *complete_data; |
| 1130 | |
Dave Jones | 8c1d286 | 2006-01-06 00:18:38 -0800 | [diff] [blame] | 1131 | current->flags |= PF_NOFREEZE; |
| 1132 | |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1133 | while (!kthread_should_stop()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) { |
| 1135 | packet = (struct hpsb_packet *)skb->data; |
| 1136 | |
| 1137 | complete_routine = packet->complete_routine; |
| 1138 | complete_data = packet->complete_data; |
| 1139 | |
| 1140 | packet->complete_routine = packet->complete_data = NULL; |
| 1141 | |
| 1142 | complete_routine(complete_data); |
| 1143 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1145 | set_current_state(TASK_INTERRUPTIBLE); |
| 1146 | if (!skb_peek(&hpsbpkt_queue)) |
| 1147 | schedule(); |
| 1148 | __set_current_state(TASK_RUNNING); |
| 1149 | } |
| 1150 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | static int __init ieee1394_init(void) |
| 1154 | { |
| 1155 | int i, ret; |
| 1156 | |
| 1157 | skb_queue_head_init(&hpsbpkt_queue); |
| 1158 | |
| 1159 | /* non-fatal error */ |
| 1160 | if (hpsb_init_config_roms()) { |
| 1161 | HPSB_ERR("Failed to initialize some config rom entries.\n"); |
| 1162 | HPSB_ERR("Some features may not be available\n"); |
| 1163 | } |
| 1164 | |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1165 | khpsbpkt_thread = kthread_run(hpsbpkt_thread, NULL, "khpsbpkt"); |
| 1166 | if (IS_ERR(khpsbpkt_thread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | HPSB_ERR("Failed to start hpsbpkt thread!\n"); |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1168 | ret = PTR_ERR(khpsbpkt_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | goto exit_cleanup_config_roms; |
| 1170 | } |
| 1171 | |
| 1172 | if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) { |
| 1173 | HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR); |
| 1174 | ret = -ENODEV; |
| 1175 | goto exit_release_kernel_thread; |
| 1176 | } |
| 1177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | ret = bus_register(&ieee1394_bus_type); |
| 1179 | if (ret < 0) { |
| 1180 | HPSB_INFO("bus register failed"); |
Stefan Richter | a874844 | 2006-03-28 19:55:41 -0500 | [diff] [blame] | 1181 | goto release_chrdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | for (i = 0; fw_bus_attrs[i]; i++) { |
| 1185 | ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]); |
| 1186 | if (ret < 0) { |
| 1187 | while (i >= 0) { |
| 1188 | bus_remove_file(&ieee1394_bus_type, |
| 1189 | fw_bus_attrs[i--]); |
| 1190 | } |
| 1191 | bus_unregister(&ieee1394_bus_type); |
Stefan Richter | a874844 | 2006-03-28 19:55:41 -0500 | [diff] [blame] | 1192 | goto release_chrdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | ret = class_register(&hpsb_host_class); |
| 1197 | if (ret < 0) |
| 1198 | goto release_all_bus; |
| 1199 | |
gregkh@suse.de | 7e25ab9 | 2005-03-23 09:53:36 -0800 | [diff] [blame] | 1200 | hpsb_protocol_class = class_create(THIS_MODULE, "ieee1394_protocol"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | if (IS_ERR(hpsb_protocol_class)) { |
| 1202 | ret = PTR_ERR(hpsb_protocol_class); |
| 1203 | goto release_class_host; |
| 1204 | } |
| 1205 | |
| 1206 | ret = init_csr(); |
| 1207 | if (ret) { |
| 1208 | HPSB_INFO("init csr failed"); |
| 1209 | ret = -ENOMEM; |
| 1210 | goto release_class_protocol; |
| 1211 | } |
| 1212 | |
| 1213 | if (disable_nodemgr) { |
| 1214 | HPSB_INFO("nodemgr and IRM functionality disabled"); |
| 1215 | /* We shouldn't contend for IRM with nodemgr disabled, since |
| 1216 | nodemgr implements functionality required of ieee1394a-2000 |
| 1217 | IRMs */ |
| 1218 | hpsb_disable_irm = 1; |
Stefan Richter | 741854e | 2005-12-01 18:52:03 -0500 | [diff] [blame] | 1219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | return 0; |
| 1221 | } |
| 1222 | |
| 1223 | if (hpsb_disable_irm) { |
| 1224 | HPSB_INFO("IRM functionality disabled"); |
| 1225 | } |
| 1226 | |
| 1227 | ret = init_ieee1394_nodemgr(); |
| 1228 | if (ret < 0) { |
| 1229 | HPSB_INFO("init nodemgr failed"); |
| 1230 | goto cleanup_csr; |
| 1231 | } |
| 1232 | |
| 1233 | return 0; |
| 1234 | |
| 1235 | cleanup_csr: |
| 1236 | cleanup_csr(); |
| 1237 | release_class_protocol: |
gregkh@suse.de | 7e25ab9 | 2005-03-23 09:53:36 -0800 | [diff] [blame] | 1238 | class_destroy(hpsb_protocol_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | release_class_host: |
| 1240 | class_unregister(&hpsb_host_class); |
| 1241 | release_all_bus: |
| 1242 | for (i = 0; fw_bus_attrs[i]; i++) |
| 1243 | bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]); |
| 1244 | bus_unregister(&ieee1394_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | release_chrdev: |
| 1246 | unregister_chrdev_region(IEEE1394_CORE_DEV, 256); |
| 1247 | exit_release_kernel_thread: |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1248 | kthread_stop(khpsbpkt_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | exit_cleanup_config_roms: |
| 1250 | hpsb_cleanup_config_roms(); |
| 1251 | return ret; |
| 1252 | } |
| 1253 | |
| 1254 | static void __exit ieee1394_cleanup(void) |
| 1255 | { |
| 1256 | int i; |
| 1257 | |
| 1258 | if (!disable_nodemgr) |
| 1259 | cleanup_ieee1394_nodemgr(); |
| 1260 | |
| 1261 | cleanup_csr(); |
| 1262 | |
gregkh@suse.de | 7e25ab9 | 2005-03-23 09:53:36 -0800 | [diff] [blame] | 1263 | class_destroy(hpsb_protocol_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | class_unregister(&hpsb_host_class); |
| 1265 | for (i = 0; fw_bus_attrs[i]; i++) |
| 1266 | bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]); |
| 1267 | bus_unregister(&ieee1394_bus_type); |
| 1268 | |
Ben Collins | f654240 | 2006-06-12 18:15:50 -0400 | [diff] [blame] | 1269 | kthread_stop(khpsbpkt_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
| 1271 | hpsb_cleanup_config_roms(); |
| 1272 | |
| 1273 | unregister_chrdev_region(IEEE1394_CORE_DEV, 256); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | } |
| 1275 | |
Andi Kleen | 8df4083 | 2006-07-27 21:54:00 +0200 | [diff] [blame] | 1276 | fs_initcall(ieee1394_init); /* same as ohci1394 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | module_exit(ieee1394_cleanup); |
| 1278 | |
| 1279 | /* Exported symbols */ |
| 1280 | |
| 1281 | /** hosts.c **/ |
| 1282 | EXPORT_SYMBOL(hpsb_alloc_host); |
| 1283 | EXPORT_SYMBOL(hpsb_add_host); |
Stefan Richter | 3360177 | 2007-01-07 21:49:27 +0100 | [diff] [blame] | 1284 | EXPORT_SYMBOL(hpsb_resume_host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | EXPORT_SYMBOL(hpsb_remove_host); |
| 1286 | EXPORT_SYMBOL(hpsb_update_config_rom_image); |
| 1287 | |
| 1288 | /** ieee1394_core.c **/ |
| 1289 | EXPORT_SYMBOL(hpsb_speedto_str); |
| 1290 | EXPORT_SYMBOL(hpsb_protocol_class); |
| 1291 | EXPORT_SYMBOL(hpsb_set_packet_complete_task); |
| 1292 | EXPORT_SYMBOL(hpsb_alloc_packet); |
| 1293 | EXPORT_SYMBOL(hpsb_free_packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | EXPORT_SYMBOL(hpsb_send_packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | EXPORT_SYMBOL(hpsb_reset_bus); |
Pieter Palmers | 3dc5ea9 | 2007-02-03 17:44:39 +0100 | [diff] [blame] | 1296 | EXPORT_SYMBOL(hpsb_read_cycle_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | EXPORT_SYMBOL(hpsb_bus_reset); |
| 1298 | EXPORT_SYMBOL(hpsb_selfid_received); |
| 1299 | EXPORT_SYMBOL(hpsb_selfid_complete); |
| 1300 | EXPORT_SYMBOL(hpsb_packet_sent); |
| 1301 | EXPORT_SYMBOL(hpsb_packet_received); |
| 1302 | EXPORT_SYMBOL_GPL(hpsb_disable_irm); |
| 1303 | |
| 1304 | /** ieee1394_transactions.c **/ |
| 1305 | EXPORT_SYMBOL(hpsb_get_tlabel); |
| 1306 | EXPORT_SYMBOL(hpsb_free_tlabel); |
| 1307 | EXPORT_SYMBOL(hpsb_make_readpacket); |
| 1308 | EXPORT_SYMBOL(hpsb_make_writepacket); |
| 1309 | EXPORT_SYMBOL(hpsb_make_streampacket); |
| 1310 | EXPORT_SYMBOL(hpsb_make_lockpacket); |
| 1311 | EXPORT_SYMBOL(hpsb_make_lock64packet); |
| 1312 | EXPORT_SYMBOL(hpsb_make_phypacket); |
| 1313 | EXPORT_SYMBOL(hpsb_make_isopacket); |
| 1314 | EXPORT_SYMBOL(hpsb_read); |
| 1315 | EXPORT_SYMBOL(hpsb_write); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | EXPORT_SYMBOL(hpsb_packet_success); |
| 1317 | |
| 1318 | /** highlevel.c **/ |
| 1319 | EXPORT_SYMBOL(hpsb_register_highlevel); |
| 1320 | EXPORT_SYMBOL(hpsb_unregister_highlevel); |
| 1321 | EXPORT_SYMBOL(hpsb_register_addrspace); |
| 1322 | EXPORT_SYMBOL(hpsb_unregister_addrspace); |
| 1323 | EXPORT_SYMBOL(hpsb_allocate_and_register_addrspace); |
| 1324 | EXPORT_SYMBOL(hpsb_listen_channel); |
| 1325 | EXPORT_SYMBOL(hpsb_unlisten_channel); |
| 1326 | EXPORT_SYMBOL(hpsb_get_hostinfo); |
| 1327 | EXPORT_SYMBOL(hpsb_create_hostinfo); |
| 1328 | EXPORT_SYMBOL(hpsb_destroy_hostinfo); |
| 1329 | EXPORT_SYMBOL(hpsb_set_hostinfo_key); |
| 1330 | EXPORT_SYMBOL(hpsb_get_hostinfo_bykey); |
| 1331 | EXPORT_SYMBOL(hpsb_set_hostinfo); |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 1332 | EXPORT_SYMBOL(highlevel_host_reset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
| 1334 | /** nodemgr.c **/ |
| 1335 | EXPORT_SYMBOL(hpsb_node_fill_packet); |
| 1336 | EXPORT_SYMBOL(hpsb_node_write); |
Ben Collins | ed30c26 | 2006-11-23 13:59:48 -0500 | [diff] [blame] | 1337 | EXPORT_SYMBOL(__hpsb_register_protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | EXPORT_SYMBOL(hpsb_unregister_protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | |
| 1340 | /** csr.c **/ |
| 1341 | EXPORT_SYMBOL(hpsb_update_config_rom); |
| 1342 | |
| 1343 | /** dma.c **/ |
| 1344 | EXPORT_SYMBOL(dma_prog_region_init); |
| 1345 | EXPORT_SYMBOL(dma_prog_region_alloc); |
| 1346 | EXPORT_SYMBOL(dma_prog_region_free); |
| 1347 | EXPORT_SYMBOL(dma_region_init); |
| 1348 | EXPORT_SYMBOL(dma_region_alloc); |
| 1349 | EXPORT_SYMBOL(dma_region_free); |
| 1350 | EXPORT_SYMBOL(dma_region_sync_for_cpu); |
| 1351 | EXPORT_SYMBOL(dma_region_sync_for_device); |
| 1352 | EXPORT_SYMBOL(dma_region_mmap); |
| 1353 | EXPORT_SYMBOL(dma_region_offset_to_bus); |
| 1354 | |
| 1355 | /** iso.c **/ |
| 1356 | EXPORT_SYMBOL(hpsb_iso_xmit_init); |
| 1357 | EXPORT_SYMBOL(hpsb_iso_recv_init); |
| 1358 | EXPORT_SYMBOL(hpsb_iso_xmit_start); |
| 1359 | EXPORT_SYMBOL(hpsb_iso_recv_start); |
| 1360 | EXPORT_SYMBOL(hpsb_iso_recv_listen_channel); |
| 1361 | EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel); |
| 1362 | EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask); |
| 1363 | EXPORT_SYMBOL(hpsb_iso_stop); |
| 1364 | EXPORT_SYMBOL(hpsb_iso_shutdown); |
| 1365 | EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet); |
| 1366 | EXPORT_SYMBOL(hpsb_iso_xmit_sync); |
| 1367 | EXPORT_SYMBOL(hpsb_iso_recv_release_packets); |
| 1368 | EXPORT_SYMBOL(hpsb_iso_n_ready); |
| 1369 | EXPORT_SYMBOL(hpsb_iso_packet_sent); |
| 1370 | EXPORT_SYMBOL(hpsb_iso_packet_received); |
| 1371 | EXPORT_SYMBOL(hpsb_iso_wake); |
| 1372 | EXPORT_SYMBOL(hpsb_iso_recv_flush); |
| 1373 | |
| 1374 | /** csr1212.c **/ |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 1375 | EXPORT_SYMBOL(csr1212_attach_keyval_to_directory); |
| 1376 | EXPORT_SYMBOL(csr1212_detach_keyval_from_directory); |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame^] | 1377 | EXPORT_SYMBOL(csr1212_get_keyval); |
| 1378 | EXPORT_SYMBOL(csr1212_new_directory); |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 1379 | EXPORT_SYMBOL(csr1212_parse_keyval); |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame^] | 1380 | EXPORT_SYMBOL(csr1212_read); |
| 1381 | EXPORT_SYMBOL(csr1212_release_keyval); |