Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 |
| 3 | * |
| 4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) |
| 5 | * jamesg@filanet.com (JSG) |
| 6 | * |
| 7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software Foundation, |
| 21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * Brief Description: |
| 26 | * |
| 27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 |
| 28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level |
| 29 | * driver. It also registers as a SCSI lower-level driver in order to accept |
| 30 | * SCSI commands for transport using SBP-2. |
| 31 | * |
| 32 | * You may access any attached SBP-2 storage devices as if they were SCSI |
| 33 | * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). |
| 34 | * |
| 35 | * Current Issues: |
| 36 | * |
| 37 | * - Error Handling: SCSI aborts and bus reset requests are handled somewhat |
| 38 | * but the code needs additional debugging. |
| 39 | */ |
| 40 | |
| 41 | #include <linux/config.h> |
| 42 | #include <linux/kernel.h> |
| 43 | #include <linux/list.h> |
| 44 | #include <linux/string.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/interrupt.h> |
| 47 | #include <linux/fs.h> |
| 48 | #include <linux/poll.h> |
| 49 | #include <linux/module.h> |
| 50 | #include <linux/moduleparam.h> |
| 51 | #include <linux/types.h> |
| 52 | #include <linux/delay.h> |
| 53 | #include <linux/sched.h> |
| 54 | #include <linux/blkdev.h> |
| 55 | #include <linux/smp_lock.h> |
| 56 | #include <linux/init.h> |
| 57 | #include <linux/pci.h> |
| 58 | |
| 59 | #include <asm/current.h> |
| 60 | #include <asm/uaccess.h> |
| 61 | #include <asm/io.h> |
| 62 | #include <asm/byteorder.h> |
| 63 | #include <asm/atomic.h> |
| 64 | #include <asm/system.h> |
| 65 | #include <asm/scatterlist.h> |
| 66 | |
| 67 | #include <scsi/scsi.h> |
| 68 | #include <scsi/scsi_cmnd.h> |
| 69 | #include <scsi/scsi_dbg.h> |
| 70 | #include <scsi/scsi_device.h> |
| 71 | #include <scsi/scsi_host.h> |
| 72 | |
| 73 | #include "csr1212.h" |
| 74 | #include "ieee1394.h" |
| 75 | #include "ieee1394_types.h" |
| 76 | #include "ieee1394_core.h" |
| 77 | #include "nodemgr.h" |
| 78 | #include "hosts.h" |
| 79 | #include "highlevel.h" |
| 80 | #include "ieee1394_transactions.h" |
| 81 | #include "sbp2.h" |
| 82 | |
| 83 | static char version[] __devinitdata = |
| 84 | "$Rev: 1219 $ Ben Collins <bcollins@debian.org>"; |
| 85 | |
| 86 | /* |
| 87 | * Module load parameter definitions |
| 88 | */ |
| 89 | |
| 90 | /* |
| 91 | * Change max_speed on module load if you have a bad IEEE-1394 |
| 92 | * controller that has trouble running 2KB packets at 400mb. |
| 93 | * |
| 94 | * NOTE: On certain OHCI parts I have seen short packets on async transmit |
| 95 | * (probably due to PCI latency/throughput issues with the part). You can |
| 96 | * bump down the speed if you are running into problems. |
| 97 | */ |
| 98 | static int max_speed = IEEE1394_SPEED_MAX; |
| 99 | module_param(max_speed, int, 0644); |
| 100 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)"); |
| 101 | |
| 102 | /* |
| 103 | * Set serialize_io to 1 if you'd like only one scsi command sent |
| 104 | * down to us at a time (debugging). This might be necessary for very |
| 105 | * badly behaved sbp2 devices. |
| 106 | */ |
| 107 | static int serialize_io = 0; |
| 108 | module_param(serialize_io, int, 0444); |
| 109 | MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)"); |
| 110 | |
| 111 | /* |
| 112 | * Bump up max_sectors if you'd like to support very large sized |
| 113 | * transfers. Please note that some older sbp2 bridge chips are broken for |
| 114 | * transfers greater or equal to 128KB. Default is a value of 255 |
| 115 | * sectors, or just under 128KB (at 512 byte sector size). I can note that |
| 116 | * the Oxsemi sbp2 chipsets have no problems supporting very large |
| 117 | * transfer sizes. |
| 118 | */ |
| 119 | static int max_sectors = SBP2_MAX_SECTORS; |
| 120 | module_param(max_sectors, int, 0444); |
| 121 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); |
| 122 | |
| 123 | /* |
| 124 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should |
| 125 | * do an exclusive login, as it's generally unsafe to have two hosts |
| 126 | * talking to a single sbp2 device at the same time (filesystem coherency, |
| 127 | * etc.). If you're running an sbp2 device that supports multiple logins, |
| 128 | * and you're either running read-only filesystems or some sort of special |
| 129 | * filesystem supporting multiple hosts (one such filesystem is OpenGFS, |
| 130 | * see opengfs.sourceforge.net for more info), then set exclusive_login |
| 131 | * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four |
| 132 | * concurrent logins. |
| 133 | */ |
| 134 | static int exclusive_login = 1; |
| 135 | module_param(exclusive_login, int, 0644); |
| 136 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); |
| 137 | |
| 138 | /* |
| 139 | * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on |
| 140 | * if your sbp2 device is not properly handling the SCSI inquiry command. |
| 141 | * This hack makes the inquiry look more like a typical MS Windows |
| 142 | * inquiry. |
| 143 | * |
| 144 | * If force_inquiry_hack=1 is required for your device to work, |
| 145 | * please submit the logged sbp2_firmware_revision value of this device to |
| 146 | * the linux1394-devel mailing list. |
| 147 | */ |
| 148 | static int force_inquiry_hack = 0; |
| 149 | module_param(force_inquiry_hack, int, 0444); |
| 150 | MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); |
| 151 | |
| 152 | |
| 153 | /* |
| 154 | * Export information about protocols/devices supported by this driver. |
| 155 | */ |
| 156 | static struct ieee1394_device_id sbp2_id_table[] = { |
| 157 | { |
| 158 | .match_flags =IEEE1394_MATCH_SPECIFIER_ID | |
| 159 | IEEE1394_MATCH_VERSION, |
| 160 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, |
| 161 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff |
| 162 | }, |
| 163 | { } |
| 164 | }; |
| 165 | |
| 166 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 167 | |
| 168 | /* |
| 169 | * Debug levels, configured via kernel config, or enable here. |
| 170 | */ |
| 171 | |
| 172 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
| 173 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ |
| 174 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ |
| 175 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ |
| 176 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ |
| 177 | |
| 178 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS |
| 179 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) |
| 180 | static u32 global_outstanding_command_orbs = 0; |
| 181 | #define outstanding_orb_incr global_outstanding_command_orbs++ |
| 182 | #define outstanding_orb_decr global_outstanding_command_orbs-- |
| 183 | #else |
| 184 | #define SBP2_ORB_DEBUG(fmt, args...) |
| 185 | #define outstanding_orb_incr |
| 186 | #define outstanding_orb_decr |
| 187 | #endif |
| 188 | |
| 189 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA |
| 190 | #define SBP2_DMA_ALLOC(fmt, args...) \ |
| 191 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ |
| 192 | ++global_outstanding_dmas, ## args) |
| 193 | #define SBP2_DMA_FREE(fmt, args...) \ |
| 194 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ |
| 195 | --global_outstanding_dmas, ## args) |
| 196 | static u32 global_outstanding_dmas = 0; |
| 197 | #else |
| 198 | #define SBP2_DMA_ALLOC(fmt, args...) |
| 199 | #define SBP2_DMA_FREE(fmt, args...) |
| 200 | #endif |
| 201 | |
| 202 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 |
| 203 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| 204 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| 205 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| 206 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| 207 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 |
| 208 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) |
| 209 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| 210 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) |
| 211 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) |
| 212 | #else |
| 213 | #define SBP2_DEBUG(fmt, args...) |
| 214 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| 215 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) |
| 216 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) |
| 217 | #endif |
| 218 | |
| 219 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| 220 | |
| 221 | |
| 222 | /* |
| 223 | * Globals |
| 224 | */ |
| 225 | |
| 226 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, |
| 227 | u32 status); |
| 228 | |
| 229 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, |
| 230 | u32 scsi_status, struct scsi_cmnd *SCpnt, |
| 231 | void (*done)(struct scsi_cmnd *)); |
| 232 | |
| 233 | static struct scsi_host_template scsi_driver_template; |
| 234 | |
| 235 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; |
| 236 | |
| 237 | static void sbp2_host_reset(struct hpsb_host *host); |
| 238 | |
| 239 | static int sbp2_probe(struct device *dev); |
| 240 | static int sbp2_remove(struct device *dev); |
| 241 | static int sbp2_update(struct unit_directory *ud); |
| 242 | |
| 243 | static struct hpsb_highlevel sbp2_highlevel = { |
| 244 | .name = SBP2_DEVICE_NAME, |
| 245 | .host_reset = sbp2_host_reset, |
| 246 | }; |
| 247 | |
| 248 | static struct hpsb_address_ops sbp2_ops = { |
| 249 | .write = sbp2_handle_status_write |
| 250 | }; |
| 251 | |
| 252 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 253 | static struct hpsb_address_ops sbp2_physdma_ops = { |
| 254 | .read = sbp2_handle_physdma_read, |
| 255 | .write = sbp2_handle_physdma_write, |
| 256 | }; |
| 257 | #endif |
| 258 | |
| 259 | static struct hpsb_protocol_driver sbp2_driver = { |
| 260 | .name = "SBP2 Driver", |
| 261 | .id_table = sbp2_id_table, |
| 262 | .update = sbp2_update, |
| 263 | .driver = { |
| 264 | .name = SBP2_DEVICE_NAME, |
| 265 | .bus = &ieee1394_bus_type, |
| 266 | .probe = sbp2_probe, |
| 267 | .remove = sbp2_remove, |
| 268 | }, |
| 269 | }; |
| 270 | |
| 271 | |
| 272 | /* List of device firmware's that require a forced 36 byte inquiry. */ |
| 273 | static u32 sbp2_broken_inquiry_list[] = { |
| 274 | 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ |
| 275 | /* DViCO Momobay CX-1 */ |
| 276 | 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ |
| 277 | /* QPS Fire DVDBurner */ |
| 278 | }; |
| 279 | |
| 280 | #define NUM_BROKEN_INQUIRY_DEVS \ |
| 281 | (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) |
| 282 | |
| 283 | /************************************** |
| 284 | * General utility functions |
| 285 | **************************************/ |
| 286 | |
| 287 | |
| 288 | #ifndef __BIG_ENDIAN |
| 289 | /* |
| 290 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. |
| 291 | */ |
| 292 | static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
| 293 | { |
| 294 | u32 *temp = buffer; |
| 295 | |
| 296 | for (length = (length >> 2); length--; ) |
| 297 | temp[length] = be32_to_cpu(temp[length]); |
| 298 | |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. |
| 304 | */ |
| 305 | static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
| 306 | { |
| 307 | u32 *temp = buffer; |
| 308 | |
| 309 | for (length = (length >> 2); length--; ) |
| 310 | temp[length] = cpu_to_be32(temp[length]); |
| 311 | |
| 312 | return; |
| 313 | } |
| 314 | #else /* BIG_ENDIAN */ |
| 315 | /* Why waste the cpu cycles? */ |
| 316 | #define sbp2util_be32_to_cpu_buffer(x,y) |
| 317 | #define sbp2util_cpu_to_be32_buffer(x,y) |
| 318 | #endif |
| 319 | |
| 320 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP |
| 321 | /* |
| 322 | * Debug packet dump routine. Length is in bytes. |
| 323 | */ |
| 324 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr) |
| 325 | { |
| 326 | int i; |
| 327 | unsigned char *dump = buffer; |
| 328 | |
| 329 | if (!dump || !length || !dump_name) |
| 330 | return; |
| 331 | |
| 332 | if (dump_phys_addr) |
| 333 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); |
| 334 | else |
| 335 | printk("[%s]", dump_name); |
| 336 | for (i = 0; i < length; i++) { |
| 337 | if (i > 0x3f) { |
| 338 | printk("\n ..."); |
| 339 | break; |
| 340 | } |
| 341 | if ((i & 0x3) == 0) |
| 342 | printk(" "); |
| 343 | if ((i & 0xf) == 0) |
| 344 | printk("\n "); |
| 345 | printk("%02x ", (int) dump[i]); |
| 346 | } |
| 347 | printk("\n"); |
| 348 | |
| 349 | return; |
| 350 | } |
| 351 | #else |
| 352 | #define sbp2util_packet_dump(w,x,y,z) |
| 353 | #endif |
| 354 | |
| 355 | /* |
| 356 | * Goofy routine that basically does a down_timeout function. |
| 357 | */ |
| 358 | static int sbp2util_down_timeout(atomic_t *done, int timeout) |
| 359 | { |
| 360 | int i; |
| 361 | |
| 362 | for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { |
| 363 | if (msleep_interruptible(100)) /* 100ms */ |
| 364 | return(1); |
| 365 | } |
| 366 | return ((i > 0) ? 0:1); |
| 367 | } |
| 368 | |
| 369 | /* Free's an allocated packet */ |
| 370 | static void sbp2_free_packet(struct hpsb_packet *packet) |
| 371 | { |
| 372 | hpsb_free_tlabel(packet); |
| 373 | hpsb_free_packet(packet); |
| 374 | } |
| 375 | |
| 376 | /* This is much like hpsb_node_write(), except it ignores the response |
| 377 | * subaction and returns immediately. Can be used from interrupts. |
| 378 | */ |
| 379 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, |
| 380 | quadlet_t *buffer, size_t length) |
| 381 | { |
| 382 | struct hpsb_packet *packet; |
| 383 | |
| 384 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, |
| 385 | addr, buffer, length); |
| 386 | if (!packet) |
| 387 | return -ENOMEM; |
| 388 | |
| 389 | hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet, |
| 390 | packet); |
| 391 | |
| 392 | hpsb_node_fill_packet(ne, packet); |
| 393 | |
| 394 | if (hpsb_send_packet(packet) < 0) { |
| 395 | sbp2_free_packet(packet); |
| 396 | return -EIO; |
| 397 | } |
| 398 | |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * This function is called to create a pool of command orbs used for |
| 404 | * command processing. It is called when a new sbp2 device is detected. |
| 405 | */ |
| 406 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
| 407 | { |
| 408 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 409 | int i; |
| 410 | unsigned long flags, orbs; |
| 411 | struct sbp2_command_info *command; |
| 412 | |
| 413 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; |
| 414 | |
| 415 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 416 | for (i = 0; i < orbs; i++) { |
| 417 | command = (struct sbp2_command_info *) |
| 418 | kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC); |
| 419 | if (!command) { |
| 420 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 421 | return(-ENOMEM); |
| 422 | } |
| 423 | memset(command, '\0', sizeof(struct sbp2_command_info)); |
| 424 | command->command_orb_dma = |
| 425 | pci_map_single (hi->host->pdev, &command->command_orb, |
| 426 | sizeof(struct sbp2_command_orb), |
| 427 | PCI_DMA_BIDIRECTIONAL); |
| 428 | SBP2_DMA_ALLOC("single command orb DMA"); |
| 429 | command->sge_dma = |
| 430 | pci_map_single (hi->host->pdev, &command->scatter_gather_element, |
| 431 | sizeof(command->scatter_gather_element), |
| 432 | PCI_DMA_BIDIRECTIONAL); |
| 433 | SBP2_DMA_ALLOC("scatter_gather_element"); |
| 434 | INIT_LIST_HEAD(&command->list); |
| 435 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); |
| 436 | } |
| 437 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * This function is called to delete a pool of command orbs. |
| 443 | */ |
| 444 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
| 445 | { |
| 446 | struct hpsb_host *host = scsi_id->hi->host; |
| 447 | struct list_head *lh, *next; |
| 448 | struct sbp2_command_info *command; |
| 449 | unsigned long flags; |
| 450 | |
| 451 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 452 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { |
| 453 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { |
| 454 | command = list_entry(lh, struct sbp2_command_info, list); |
| 455 | |
| 456 | /* Release our generic DMA's */ |
| 457 | pci_unmap_single(host->pdev, command->command_orb_dma, |
| 458 | sizeof(struct sbp2_command_orb), |
| 459 | PCI_DMA_BIDIRECTIONAL); |
| 460 | SBP2_DMA_FREE("single command orb DMA"); |
| 461 | pci_unmap_single(host->pdev, command->sge_dma, |
| 462 | sizeof(command->scatter_gather_element), |
| 463 | PCI_DMA_BIDIRECTIONAL); |
| 464 | SBP2_DMA_FREE("scatter_gather_element"); |
| 465 | |
| 466 | kfree(command); |
| 467 | } |
| 468 | } |
| 469 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 470 | return; |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * This function finds the sbp2_command for a given outstanding command |
| 475 | * orb.Only looks at the inuse list. |
| 476 | */ |
| 477 | static struct sbp2_command_info *sbp2util_find_command_for_orb( |
| 478 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) |
| 479 | { |
| 480 | struct sbp2_command_info *command; |
| 481 | unsigned long flags; |
| 482 | |
| 483 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 484 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| 485 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { |
| 486 | if (command->command_orb_dma == orb) { |
| 487 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 488 | return (command); |
| 489 | } |
| 490 | } |
| 491 | } |
| 492 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 493 | |
| 494 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); |
| 495 | |
| 496 | return(NULL); |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * This function finds the sbp2_command for a given outstanding SCpnt. |
| 501 | * Only looks at the inuse list. |
| 502 | */ |
| 503 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) |
| 504 | { |
| 505 | struct sbp2_command_info *command; |
| 506 | unsigned long flags; |
| 507 | |
| 508 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 509 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| 510 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { |
| 511 | if (command->Current_SCpnt == SCpnt) { |
| 512 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 513 | return (command); |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 518 | return(NULL); |
| 519 | } |
| 520 | |
| 521 | /* |
| 522 | * This function allocates a command orb used to send a scsi command. |
| 523 | */ |
| 524 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
| 525 | struct scsi_id_instance_data *scsi_id, |
| 526 | struct scsi_cmnd *Current_SCpnt, |
| 527 | void (*Current_done)(struct scsi_cmnd *)) |
| 528 | { |
| 529 | struct list_head *lh; |
| 530 | struct sbp2_command_info *command = NULL; |
| 531 | unsigned long flags; |
| 532 | |
| 533 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 534 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { |
| 535 | lh = scsi_id->sbp2_command_orb_completed.next; |
| 536 | list_del(lh); |
| 537 | command = list_entry(lh, struct sbp2_command_info, list); |
| 538 | command->Current_done = Current_done; |
| 539 | command->Current_SCpnt = Current_SCpnt; |
| 540 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); |
| 541 | } else { |
| 542 | SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); |
| 543 | } |
| 544 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 545 | return (command); |
| 546 | } |
| 547 | |
| 548 | /* Free our DMA's */ |
| 549 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) |
| 550 | { |
| 551 | struct scsi_id_instance_data *scsi_id = |
| 552 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; |
| 553 | struct hpsb_host *host; |
| 554 | |
| 555 | if (!scsi_id) { |
| 556 | printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); |
| 557 | return; |
| 558 | } |
| 559 | |
| 560 | host = scsi_id->ud->ne->host; |
| 561 | |
| 562 | if (command->cmd_dma) { |
| 563 | if (command->dma_type == CMD_DMA_SINGLE) { |
| 564 | pci_unmap_single(host->pdev, command->cmd_dma, |
| 565 | command->dma_size, command->dma_dir); |
| 566 | SBP2_DMA_FREE("single bulk"); |
| 567 | } else if (command->dma_type == CMD_DMA_PAGE) { |
| 568 | pci_unmap_page(host->pdev, command->cmd_dma, |
| 569 | command->dma_size, command->dma_dir); |
| 570 | SBP2_DMA_FREE("single page"); |
| 571 | } /* XXX: Check for CMD_DMA_NONE bug */ |
| 572 | command->dma_type = CMD_DMA_NONE; |
| 573 | command->cmd_dma = 0; |
| 574 | } |
| 575 | |
| 576 | if (command->sge_buffer) { |
| 577 | pci_unmap_sg(host->pdev, command->sge_buffer, |
| 578 | command->dma_size, command->dma_dir); |
| 579 | SBP2_DMA_FREE("scatter list"); |
| 580 | command->sge_buffer = NULL; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * This function moves a command to the completed orb list. |
| 586 | */ |
| 587 | static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command) |
| 588 | { |
| 589 | unsigned long flags; |
| 590 | |
| 591 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| 592 | list_del(&command->list); |
| 593 | sbp2util_free_command_dma(command); |
| 594 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); |
| 595 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| 596 | } |
| 597 | |
| 598 | |
| 599 | |
| 600 | /********************************************* |
| 601 | * IEEE-1394 core driver stack related section |
| 602 | *********************************************/ |
| 603 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); |
| 604 | |
| 605 | static int sbp2_probe(struct device *dev) |
| 606 | { |
| 607 | struct unit_directory *ud; |
| 608 | struct scsi_id_instance_data *scsi_id; |
| 609 | |
| 610 | SBP2_DEBUG("sbp2_probe"); |
| 611 | |
| 612 | ud = container_of(dev, struct unit_directory, device); |
| 613 | |
| 614 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) |
| 615 | * instead. */ |
| 616 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) |
| 617 | return -ENODEV; |
| 618 | |
| 619 | scsi_id = sbp2_alloc_device(ud); |
| 620 | |
| 621 | if (!scsi_id) |
| 622 | return -ENOMEM; |
| 623 | |
| 624 | sbp2_parse_unit_directory(scsi_id, ud); |
| 625 | |
| 626 | return sbp2_start_device(scsi_id); |
| 627 | } |
| 628 | |
| 629 | static int sbp2_remove(struct device *dev) |
| 630 | { |
| 631 | struct unit_directory *ud; |
| 632 | struct scsi_id_instance_data *scsi_id; |
| 633 | |
| 634 | SBP2_DEBUG("sbp2_remove"); |
| 635 | |
| 636 | ud = container_of(dev, struct unit_directory, device); |
| 637 | scsi_id = ud->device.driver_data; |
| 638 | |
| 639 | sbp2_logout_device(scsi_id); |
| 640 | sbp2_remove_device(scsi_id); |
| 641 | |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static int sbp2_update(struct unit_directory *ud) |
| 646 | { |
| 647 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; |
| 648 | |
| 649 | SBP2_DEBUG("sbp2_update"); |
| 650 | |
| 651 | if (sbp2_reconnect_device(scsi_id)) { |
| 652 | |
| 653 | /* |
| 654 | * Ok, reconnect has failed. Perhaps we didn't |
| 655 | * reconnect fast enough. Try doing a regular login, but |
| 656 | * first do a logout just in case of any weirdness. |
| 657 | */ |
| 658 | sbp2_logout_device(scsi_id); |
| 659 | |
| 660 | if (sbp2_login_device(scsi_id)) { |
| 661 | /* Login failed too, just fail, and the backend |
| 662 | * will call our sbp2_remove for us */ |
| 663 | SBP2_ERR("Failed to reconnect to sbp2 device!"); |
| 664 | return -EBUSY; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | /* Set max retries to something large on the device. */ |
| 669 | sbp2_set_busy_timeout(scsi_id); |
| 670 | |
| 671 | /* Do a SBP-2 fetch agent reset. */ |
| 672 | sbp2_agent_reset(scsi_id, 1); |
| 673 | |
| 674 | /* Get the max speed and packet size that we can use. */ |
| 675 | sbp2_max_speed_and_size(scsi_id); |
| 676 | |
| 677 | /* Complete any pending commands with busy (so they get |
| 678 | * retried) and remove them from our queue |
| 679 | */ |
| 680 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
| 681 | |
| 682 | /* Make sure we unblock requests (since this is likely after a bus |
| 683 | * reset). */ |
| 684 | scsi_unblock_requests(scsi_id->scsi_host); |
| 685 | |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | /* This functions is called by the sbp2_probe, for each new device. We now |
| 690 | * allocate one scsi host for each scsi_id (unit directory). */ |
| 691 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) |
| 692 | { |
| 693 | struct sbp2scsi_host_info *hi; |
| 694 | struct Scsi_Host *scsi_host = NULL; |
| 695 | struct scsi_id_instance_data *scsi_id = NULL; |
| 696 | |
| 697 | SBP2_DEBUG("sbp2_alloc_device"); |
| 698 | |
| 699 | scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL); |
| 700 | if (!scsi_id) { |
| 701 | SBP2_ERR("failed to create scsi_id"); |
| 702 | goto failed_alloc; |
| 703 | } |
| 704 | memset(scsi_id, 0, sizeof(*scsi_id)); |
| 705 | |
| 706 | scsi_id->ne = ud->ne; |
| 707 | scsi_id->ud = ud; |
| 708 | scsi_id->speed_code = IEEE1394_SPEED_100; |
| 709 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; |
| 710 | atomic_set(&scsi_id->sbp2_login_complete, 0); |
| 711 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
| 712 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); |
| 713 | INIT_LIST_HEAD(&scsi_id->scsi_list); |
| 714 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); |
| 715 | scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED; |
| 716 | |
| 717 | ud->device.driver_data = scsi_id; |
| 718 | |
| 719 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); |
| 720 | if (!hi) { |
| 721 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); |
| 722 | if (!hi) { |
| 723 | SBP2_ERR("failed to allocate hostinfo"); |
| 724 | goto failed_alloc; |
| 725 | } |
| 726 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); |
| 727 | hi->host = ud->ne->host; |
| 728 | INIT_LIST_HEAD(&hi->scsi_ids); |
| 729 | |
| 730 | /* Register our sbp2 status address space... */ |
| 731 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, |
| 732 | SBP2_STATUS_FIFO_ADDRESS, |
| 733 | SBP2_STATUS_FIFO_ADDRESS + |
| 734 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); |
| 735 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 736 | /* Handle data movement if physical dma is not |
| 737 | * enabled/supportedon host controller */ |
| 738 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, |
| 739 | 0x0ULL, 0xfffffffcULL); |
| 740 | #endif |
| 741 | } |
| 742 | |
| 743 | scsi_id->hi = hi; |
| 744 | |
| 745 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); |
| 746 | |
| 747 | /* Register our host with the SCSI stack. */ |
Alexandre Oliva | a2ef79e | 2005-06-15 22:26:31 -0700 | [diff] [blame] | 748 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
| 749 | sizeof (unsigned long)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (!scsi_host) { |
| 751 | SBP2_ERR("failed to register scsi host"); |
| 752 | goto failed_alloc; |
| 753 | } |
| 754 | |
| 755 | scsi_host->hostdata[0] = (unsigned long)scsi_id; |
| 756 | |
| 757 | if (!scsi_add_host(scsi_host, &ud->device)) { |
| 758 | scsi_id->scsi_host = scsi_host; |
| 759 | return scsi_id; |
| 760 | } |
| 761 | |
| 762 | SBP2_ERR("failed to add scsi host"); |
| 763 | scsi_host_put(scsi_host); |
| 764 | |
| 765 | failed_alloc: |
| 766 | sbp2_remove_device(scsi_id); |
| 767 | return NULL; |
| 768 | } |
| 769 | |
| 770 | |
| 771 | static void sbp2_host_reset(struct hpsb_host *host) |
| 772 | { |
| 773 | struct sbp2scsi_host_info *hi; |
| 774 | struct scsi_id_instance_data *scsi_id; |
| 775 | |
| 776 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
| 777 | |
| 778 | if (hi) { |
| 779 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) |
| 780 | scsi_block_requests(scsi_id->scsi_host); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | |
| 785 | /* |
| 786 | * This function is where we first pull the node unique ids, and then |
| 787 | * allocate memory and register a SBP-2 device. |
| 788 | */ |
| 789 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) |
| 790 | { |
| 791 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 792 | struct scsi_device *sdev; |
| 793 | |
| 794 | SBP2_DEBUG("sbp2_start_device"); |
| 795 | |
| 796 | /* Login FIFO DMA */ |
| 797 | scsi_id->login_response = |
| 798 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response), |
| 799 | &scsi_id->login_response_dma); |
| 800 | if (!scsi_id->login_response) |
| 801 | goto alloc_fail; |
| 802 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); |
| 803 | |
| 804 | /* Query logins ORB DMA */ |
| 805 | scsi_id->query_logins_orb = |
| 806 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb), |
| 807 | &scsi_id->query_logins_orb_dma); |
| 808 | if (!scsi_id->query_logins_orb) |
| 809 | goto alloc_fail; |
| 810 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); |
| 811 | |
| 812 | /* Query logins response DMA */ |
| 813 | scsi_id->query_logins_response = |
| 814 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response), |
| 815 | &scsi_id->query_logins_response_dma); |
| 816 | if (!scsi_id->query_logins_response) |
| 817 | goto alloc_fail; |
| 818 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); |
| 819 | |
| 820 | /* Reconnect ORB DMA */ |
| 821 | scsi_id->reconnect_orb = |
| 822 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb), |
| 823 | &scsi_id->reconnect_orb_dma); |
| 824 | if (!scsi_id->reconnect_orb) |
| 825 | goto alloc_fail; |
| 826 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); |
| 827 | |
| 828 | /* Logout ORB DMA */ |
| 829 | scsi_id->logout_orb = |
| 830 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb), |
| 831 | &scsi_id->logout_orb_dma); |
| 832 | if (!scsi_id->logout_orb) |
| 833 | goto alloc_fail; |
| 834 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); |
| 835 | |
| 836 | /* Login ORB DMA */ |
| 837 | scsi_id->login_orb = |
| 838 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb), |
| 839 | &scsi_id->login_orb_dma); |
| 840 | if (!scsi_id->login_orb) { |
| 841 | alloc_fail: |
| 842 | if (scsi_id->query_logins_response) { |
| 843 | pci_free_consistent(hi->host->pdev, |
| 844 | sizeof(struct sbp2_query_logins_response), |
| 845 | scsi_id->query_logins_response, |
| 846 | scsi_id->query_logins_response_dma); |
| 847 | SBP2_DMA_FREE("query logins response DMA"); |
| 848 | } |
| 849 | |
| 850 | if (scsi_id->query_logins_orb) { |
| 851 | pci_free_consistent(hi->host->pdev, |
| 852 | sizeof(struct sbp2_query_logins_orb), |
| 853 | scsi_id->query_logins_orb, |
| 854 | scsi_id->query_logins_orb_dma); |
| 855 | SBP2_DMA_FREE("query logins ORB DMA"); |
| 856 | } |
| 857 | |
| 858 | if (scsi_id->logout_orb) { |
| 859 | pci_free_consistent(hi->host->pdev, |
| 860 | sizeof(struct sbp2_logout_orb), |
| 861 | scsi_id->logout_orb, |
| 862 | scsi_id->logout_orb_dma); |
| 863 | SBP2_DMA_FREE("logout ORB DMA"); |
| 864 | } |
| 865 | |
| 866 | if (scsi_id->reconnect_orb) { |
| 867 | pci_free_consistent(hi->host->pdev, |
| 868 | sizeof(struct sbp2_reconnect_orb), |
| 869 | scsi_id->reconnect_orb, |
| 870 | scsi_id->reconnect_orb_dma); |
| 871 | SBP2_DMA_FREE("reconnect ORB DMA"); |
| 872 | } |
| 873 | |
| 874 | if (scsi_id->login_response) { |
| 875 | pci_free_consistent(hi->host->pdev, |
| 876 | sizeof(struct sbp2_login_response), |
| 877 | scsi_id->login_response, |
| 878 | scsi_id->login_response_dma); |
| 879 | SBP2_DMA_FREE("login FIFO DMA"); |
| 880 | } |
| 881 | |
| 882 | list_del(&scsi_id->scsi_list); |
| 883 | |
| 884 | kfree(scsi_id); |
| 885 | |
| 886 | SBP2_ERR ("Could not allocate memory for scsi_id"); |
| 887 | |
| 888 | return -ENOMEM; |
| 889 | } |
| 890 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
| 891 | |
| 892 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); |
| 893 | |
| 894 | /* |
| 895 | * Create our command orb pool |
| 896 | */ |
| 897 | if (sbp2util_create_command_orb_pool(scsi_id)) { |
| 898 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); |
| 899 | sbp2_remove_device(scsi_id); |
| 900 | return -ENOMEM; |
| 901 | } |
| 902 | |
| 903 | /* Schedule a timeout here. The reason is that we may be so close |
| 904 | * to a bus reset, that the device is not available for logins. |
| 905 | * This can happen when the bus reset is caused by the host |
| 906 | * connected to the sbp2 device being removed. That host would |
| 907 | * have a certain amount of time to relogin before the sbp2 device |
| 908 | * allows someone else to login instead. One second makes sense. */ |
| 909 | msleep_interruptible(1000); |
| 910 | if (signal_pending(current)) { |
| 911 | SBP2_WARN("aborting sbp2_start_device due to event"); |
| 912 | sbp2_remove_device(scsi_id); |
| 913 | return -EINTR; |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | * Login to the sbp-2 device |
| 918 | */ |
| 919 | if (sbp2_login_device(scsi_id)) { |
| 920 | /* Login failed, just remove the device. */ |
| 921 | sbp2_remove_device(scsi_id); |
| 922 | return -EBUSY; |
| 923 | } |
| 924 | |
| 925 | /* |
| 926 | * Set max retries to something large on the device |
| 927 | */ |
| 928 | sbp2_set_busy_timeout(scsi_id); |
| 929 | |
| 930 | /* |
| 931 | * Do a SBP-2 fetch agent reset |
| 932 | */ |
| 933 | sbp2_agent_reset(scsi_id, 1); |
| 934 | |
| 935 | /* |
| 936 | * Get the max speed and packet size that we can use |
| 937 | */ |
| 938 | sbp2_max_speed_and_size(scsi_id); |
| 939 | |
| 940 | /* Add this device to the scsi layer now */ |
| 941 | sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
| 942 | if (IS_ERR(sdev)) { |
| 943 | SBP2_ERR("scsi_add_device failed"); |
| 944 | return PTR_ERR(sdev); |
| 945 | } |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. |
| 952 | */ |
| 953 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) |
| 954 | { |
| 955 | struct sbp2scsi_host_info *hi; |
| 956 | |
| 957 | SBP2_DEBUG("sbp2_remove_device"); |
| 958 | |
| 959 | if (!scsi_id) |
| 960 | return; |
| 961 | |
| 962 | hi = scsi_id->hi; |
| 963 | |
| 964 | /* This will remove our scsi device aswell */ |
| 965 | if (scsi_id->scsi_host) { |
| 966 | scsi_remove_host(scsi_id->scsi_host); |
| 967 | scsi_host_put(scsi_id->scsi_host); |
| 968 | } |
| 969 | |
| 970 | sbp2util_remove_command_orb_pool(scsi_id); |
| 971 | |
| 972 | list_del(&scsi_id->scsi_list); |
| 973 | |
| 974 | if (scsi_id->login_response) { |
| 975 | pci_free_consistent(hi->host->pdev, |
| 976 | sizeof(struct sbp2_login_response), |
| 977 | scsi_id->login_response, |
| 978 | scsi_id->login_response_dma); |
| 979 | SBP2_DMA_FREE("single login FIFO"); |
| 980 | } |
| 981 | |
| 982 | if (scsi_id->login_orb) { |
| 983 | pci_free_consistent(hi->host->pdev, |
| 984 | sizeof(struct sbp2_login_orb), |
| 985 | scsi_id->login_orb, |
| 986 | scsi_id->login_orb_dma); |
| 987 | SBP2_DMA_FREE("single login ORB"); |
| 988 | } |
| 989 | |
| 990 | if (scsi_id->reconnect_orb) { |
| 991 | pci_free_consistent(hi->host->pdev, |
| 992 | sizeof(struct sbp2_reconnect_orb), |
| 993 | scsi_id->reconnect_orb, |
| 994 | scsi_id->reconnect_orb_dma); |
| 995 | SBP2_DMA_FREE("single reconnect orb"); |
| 996 | } |
| 997 | |
| 998 | if (scsi_id->logout_orb) { |
| 999 | pci_free_consistent(hi->host->pdev, |
| 1000 | sizeof(struct sbp2_logout_orb), |
| 1001 | scsi_id->logout_orb, |
| 1002 | scsi_id->logout_orb_dma); |
| 1003 | SBP2_DMA_FREE("single logout orb"); |
| 1004 | } |
| 1005 | |
| 1006 | if (scsi_id->query_logins_orb) { |
| 1007 | pci_free_consistent(hi->host->pdev, |
| 1008 | sizeof(struct sbp2_query_logins_orb), |
| 1009 | scsi_id->query_logins_orb, |
| 1010 | scsi_id->query_logins_orb_dma); |
| 1011 | SBP2_DMA_FREE("single query logins orb"); |
| 1012 | } |
| 1013 | |
| 1014 | if (scsi_id->query_logins_response) { |
| 1015 | pci_free_consistent(hi->host->pdev, |
| 1016 | sizeof(struct sbp2_query_logins_response), |
| 1017 | scsi_id->query_logins_response, |
| 1018 | scsi_id->query_logins_response_dma); |
| 1019 | SBP2_DMA_FREE("single query logins data"); |
| 1020 | } |
| 1021 | |
| 1022 | scsi_id->ud->device.driver_data = NULL; |
| 1023 | |
| 1024 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
| 1025 | |
| 1026 | kfree(scsi_id); |
| 1027 | } |
| 1028 | |
| 1029 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 1030 | /* |
| 1031 | * This function deals with physical dma write requests (for adapters that do not support |
| 1032 | * physical dma in hardware). Mostly just here for debugging... |
| 1033 | */ |
| 1034 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data, |
| 1035 | u64 addr, size_t length, u16 flags) |
| 1036 | { |
| 1037 | |
| 1038 | /* |
| 1039 | * Manually put the data in the right place. |
| 1040 | */ |
| 1041 | memcpy(bus_to_virt((u32)addr), data, length); |
| 1042 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr); |
| 1043 | return(RCODE_COMPLETE); |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * This function deals with physical dma read requests (for adapters that do not support |
| 1048 | * physical dma in hardware). Mostly just here for debugging... |
| 1049 | */ |
| 1050 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data, |
| 1051 | u64 addr, size_t length, u16 flags) |
| 1052 | { |
| 1053 | |
| 1054 | /* |
| 1055 | * Grab data from memory and send a read response. |
| 1056 | */ |
| 1057 | memcpy(data, bus_to_virt((u32)addr), length); |
| 1058 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr); |
| 1059 | return(RCODE_COMPLETE); |
| 1060 | } |
| 1061 | #endif |
| 1062 | |
| 1063 | |
| 1064 | /************************************** |
| 1065 | * SBP-2 protocol related section |
| 1066 | **************************************/ |
| 1067 | |
| 1068 | /* |
| 1069 | * This function determines if we should convert scsi commands for a particular sbp2 device type |
| 1070 | */ |
| 1071 | static __inline__ int sbp2_command_conversion_device_type(u8 device_type) |
| 1072 | { |
| 1073 | return (((device_type == TYPE_DISK) || |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 1074 | (device_type == TYPE_RBC) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | (device_type == TYPE_ROM)) ? 1:0); |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * This function queries the device for the maximum concurrent logins it |
| 1080 | * supports. |
| 1081 | */ |
| 1082 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) |
| 1083 | { |
| 1084 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1085 | quadlet_t data[2]; |
| 1086 | int max_logins; |
| 1087 | int active_logins; |
| 1088 | |
| 1089 | SBP2_DEBUG("sbp2_query_logins"); |
| 1090 | |
| 1091 | scsi_id->query_logins_orb->reserved1 = 0x0; |
| 1092 | scsi_id->query_logins_orb->reserved2 = 0x0; |
| 1093 | |
| 1094 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; |
| 1095 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1096 | SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); |
| 1097 | |
| 1098 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); |
| 1099 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1100 | if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { |
| 1101 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); |
| 1102 | SBP2_DEBUG("sbp2_query_logins: set lun to %d", |
| 1103 | ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); |
| 1104 | } |
| 1105 | SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); |
| 1106 | |
| 1107 | scsi_id->query_logins_orb->reserved_resp_length = |
| 1108 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); |
| 1109 | SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); |
| 1110 | |
| 1111 | scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| 1112 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| 1113 | scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| 1114 | SBP2_STATUS_FIFO_ADDRESS_HI); |
| 1115 | SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); |
| 1116 | |
| 1117 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); |
| 1118 | |
| 1119 | SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); |
| 1120 | |
| 1121 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
| 1122 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); |
| 1123 | |
| 1124 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); |
| 1125 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| 1126 | |
| 1127 | SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); |
| 1128 | |
| 1129 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| 1130 | data[1] = scsi_id->query_logins_orb_dma; |
| 1131 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1132 | |
| 1133 | atomic_set(&scsi_id->sbp2_login_complete, 0); |
| 1134 | |
| 1135 | SBP2_DEBUG("sbp2_query_logins: prepared to write"); |
| 1136 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
| 1137 | SBP2_DEBUG("sbp2_query_logins: written"); |
| 1138 | |
| 1139 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { |
| 1140 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| 1141 | return(-EIO); |
| 1142 | } |
| 1143 | |
| 1144 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { |
| 1145 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| 1146 | return(-EIO); |
| 1147 | } |
| 1148 | |
| 1149 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1150 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1151 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| 1152 | |
| 1153 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| 1154 | return(-EIO); |
| 1155 | } |
| 1156 | |
| 1157 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); |
| 1158 | |
| 1159 | SBP2_DEBUG("length_max_logins = %x", |
| 1160 | (unsigned int)scsi_id->query_logins_response->length_max_logins); |
| 1161 | |
| 1162 | SBP2_DEBUG("Query logins to SBP-2 device successful"); |
| 1163 | |
| 1164 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
| 1165 | SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); |
| 1166 | |
| 1167 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); |
| 1168 | SBP2_DEBUG("Number of active logins: %d", active_logins); |
| 1169 | |
| 1170 | if (active_logins >= max_logins) { |
| 1171 | return(-EIO); |
| 1172 | } |
| 1173 | |
| 1174 | return 0; |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * This function is called in order to login to a particular SBP-2 device, |
| 1179 | * after a bus reset. |
| 1180 | */ |
| 1181 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) |
| 1182 | { |
| 1183 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1184 | quadlet_t data[2]; |
| 1185 | |
| 1186 | SBP2_DEBUG("sbp2_login_device"); |
| 1187 | |
| 1188 | if (!scsi_id->login_orb) { |
| 1189 | SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); |
| 1190 | return(-EIO); |
| 1191 | } |
| 1192 | |
| 1193 | if (!exclusive_login) { |
| 1194 | if (sbp2_query_logins(scsi_id)) { |
| 1195 | SBP2_INFO("Device does not support any more concurrent logins"); |
| 1196 | return(-EIO); |
| 1197 | } |
| 1198 | } |
| 1199 | |
| 1200 | /* Set-up login ORB, assume no password */ |
| 1201 | scsi_id->login_orb->password_hi = 0; |
| 1202 | scsi_id->login_orb->password_lo = 0; |
| 1203 | SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); |
| 1204 | |
| 1205 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; |
| 1206 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1207 | SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); |
| 1208 | |
| 1209 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
| 1210 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ |
| 1211 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ |
| 1212 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ |
| 1213 | /* Set the lun if we were able to pull it from the device's unit directory */ |
| 1214 | if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { |
| 1215 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); |
| 1216 | SBP2_DEBUG("sbp2_query_logins: set lun to %d", |
| 1217 | ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); |
| 1218 | } |
| 1219 | SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); |
| 1220 | |
| 1221 | scsi_id->login_orb->passwd_resp_lengths = |
| 1222 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
| 1223 | SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); |
| 1224 | |
| 1225 | scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| 1226 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| 1227 | scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| 1228 | SBP2_STATUS_FIFO_ADDRESS_HI); |
| 1229 | SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); |
| 1230 | |
| 1231 | /* |
| 1232 | * Byte swap ORB if necessary |
| 1233 | */ |
| 1234 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
| 1235 | |
| 1236 | SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); |
| 1237 | |
| 1238 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
| 1239 | "sbp2 login orb", scsi_id->login_orb_dma); |
| 1240 | |
| 1241 | /* |
| 1242 | * Initialize login response and status fifo |
| 1243 | */ |
| 1244 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
| 1245 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| 1246 | |
| 1247 | SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); |
| 1248 | |
| 1249 | /* |
| 1250 | * Ok, let's write to the target's management agent register |
| 1251 | */ |
| 1252 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| 1253 | data[1] = scsi_id->login_orb_dma; |
| 1254 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1255 | |
| 1256 | atomic_set(&scsi_id->sbp2_login_complete, 0); |
| 1257 | |
| 1258 | SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", |
| 1259 | (unsigned int)scsi_id->sbp2_management_agent_addr); |
| 1260 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
| 1261 | SBP2_DEBUG("sbp2_login_device: written"); |
| 1262 | |
| 1263 | /* |
| 1264 | * Wait for login status (up to 20 seconds)... |
| 1265 | */ |
| 1266 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { |
| 1267 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); |
| 1268 | return(-EIO); |
| 1269 | } |
| 1270 | |
| 1271 | /* |
| 1272 | * Sanity. Make sure status returned matches login orb. |
| 1273 | */ |
| 1274 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { |
| 1275 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); |
| 1276 | return(-EIO); |
| 1277 | } |
| 1278 | |
| 1279 | /* |
| 1280 | * Check status |
| 1281 | */ |
| 1282 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1283 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1284 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| 1285 | |
| 1286 | SBP2_ERR("Error logging into SBP-2 device - login failed"); |
| 1287 | return(-EIO); |
| 1288 | } |
| 1289 | |
| 1290 | /* |
| 1291 | * Byte swap the login response, for use when reconnecting or |
| 1292 | * logging out. |
| 1293 | */ |
| 1294 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); |
| 1295 | |
| 1296 | /* |
| 1297 | * Grab our command block agent address from the login response. |
| 1298 | */ |
| 1299 | SBP2_DEBUG("command_block_agent_hi = %x", |
| 1300 | (unsigned int)scsi_id->login_response->command_block_agent_hi); |
| 1301 | SBP2_DEBUG("command_block_agent_lo = %x", |
| 1302 | (unsigned int)scsi_id->login_response->command_block_agent_lo); |
| 1303 | |
| 1304 | scsi_id->sbp2_command_block_agent_addr = |
| 1305 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; |
| 1306 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); |
| 1307 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; |
| 1308 | |
| 1309 | SBP2_INFO("Logged into SBP-2 device"); |
| 1310 | |
| 1311 | return(0); |
| 1312 | |
| 1313 | } |
| 1314 | |
| 1315 | /* |
| 1316 | * This function is called in order to logout from a particular SBP-2 |
| 1317 | * device, usually called during driver unload. |
| 1318 | */ |
| 1319 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) |
| 1320 | { |
| 1321 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1322 | quadlet_t data[2]; |
| 1323 | int error; |
| 1324 | |
| 1325 | SBP2_DEBUG("sbp2_logout_device"); |
| 1326 | |
| 1327 | /* |
| 1328 | * Set-up logout ORB |
| 1329 | */ |
| 1330 | scsi_id->logout_orb->reserved1 = 0x0; |
| 1331 | scsi_id->logout_orb->reserved2 = 0x0; |
| 1332 | scsi_id->logout_orb->reserved3 = 0x0; |
| 1333 | scsi_id->logout_orb->reserved4 = 0x0; |
| 1334 | |
| 1335 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
| 1336 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); |
| 1337 | |
| 1338 | /* Notify us when complete */ |
| 1339 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
| 1340 | |
| 1341 | scsi_id->logout_orb->reserved5 = 0x0; |
| 1342 | scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| 1343 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| 1344 | scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| 1345 | SBP2_STATUS_FIFO_ADDRESS_HI); |
| 1346 | |
| 1347 | /* |
| 1348 | * Byte swap ORB if necessary |
| 1349 | */ |
| 1350 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); |
| 1351 | |
| 1352 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), |
| 1353 | "sbp2 logout orb", scsi_id->logout_orb_dma); |
| 1354 | |
| 1355 | /* |
| 1356 | * Ok, let's write to the target's management agent register |
| 1357 | */ |
| 1358 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| 1359 | data[1] = scsi_id->logout_orb_dma; |
| 1360 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1361 | |
| 1362 | atomic_set(&scsi_id->sbp2_login_complete, 0); |
| 1363 | |
| 1364 | error = hpsb_node_write(scsi_id->ne, |
| 1365 | scsi_id->sbp2_management_agent_addr, |
| 1366 | data, 8); |
| 1367 | if (error) |
| 1368 | return error; |
| 1369 | |
| 1370 | /* Wait for device to logout...1 second. */ |
| 1371 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) |
| 1372 | return -EIO; |
| 1373 | |
| 1374 | SBP2_INFO("Logged out of SBP-2 device"); |
| 1375 | |
| 1376 | return(0); |
| 1377 | |
| 1378 | } |
| 1379 | |
| 1380 | /* |
| 1381 | * This function is called in order to reconnect to a particular SBP-2 |
| 1382 | * device, after a bus reset. |
| 1383 | */ |
| 1384 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) |
| 1385 | { |
| 1386 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1387 | quadlet_t data[2]; |
| 1388 | int error; |
| 1389 | |
| 1390 | SBP2_DEBUG("sbp2_reconnect_device"); |
| 1391 | |
| 1392 | /* |
| 1393 | * Set-up reconnect ORB |
| 1394 | */ |
| 1395 | scsi_id->reconnect_orb->reserved1 = 0x0; |
| 1396 | scsi_id->reconnect_orb->reserved2 = 0x0; |
| 1397 | scsi_id->reconnect_orb->reserved3 = 0x0; |
| 1398 | scsi_id->reconnect_orb->reserved4 = 0x0; |
| 1399 | |
| 1400 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); |
| 1401 | scsi_id->reconnect_orb->login_ID_misc |= |
| 1402 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); |
| 1403 | |
| 1404 | /* Notify us when complete */ |
| 1405 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
| 1406 | |
| 1407 | scsi_id->reconnect_orb->reserved5 = 0x0; |
| 1408 | scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| 1409 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| 1410 | scsi_id->reconnect_orb->status_FIFO_hi = |
| 1411 | (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); |
| 1412 | |
| 1413 | /* |
| 1414 | * Byte swap ORB if necessary |
| 1415 | */ |
| 1416 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); |
| 1417 | |
| 1418 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), |
| 1419 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); |
| 1420 | |
| 1421 | /* |
| 1422 | * Initialize status fifo |
| 1423 | */ |
| 1424 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| 1425 | |
| 1426 | /* |
| 1427 | * Ok, let's write to the target's management agent register |
| 1428 | */ |
| 1429 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| 1430 | data[1] = scsi_id->reconnect_orb_dma; |
| 1431 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1432 | |
| 1433 | atomic_set(&scsi_id->sbp2_login_complete, 0); |
| 1434 | |
| 1435 | error = hpsb_node_write(scsi_id->ne, |
| 1436 | scsi_id->sbp2_management_agent_addr, |
| 1437 | data, 8); |
| 1438 | if (error) |
| 1439 | return error; |
| 1440 | |
| 1441 | /* |
| 1442 | * Wait for reconnect status (up to 1 second)... |
| 1443 | */ |
| 1444 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { |
| 1445 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); |
| 1446 | return(-EIO); |
| 1447 | } |
| 1448 | |
| 1449 | /* |
| 1450 | * Sanity. Make sure status returned matches reconnect orb. |
| 1451 | */ |
| 1452 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { |
| 1453 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); |
| 1454 | return(-EIO); |
| 1455 | } |
| 1456 | |
| 1457 | /* |
| 1458 | * Check status |
| 1459 | */ |
| 1460 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1461 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| 1462 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| 1463 | |
| 1464 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); |
| 1465 | return(-EIO); |
| 1466 | } |
| 1467 | |
| 1468 | HPSB_DEBUG("Reconnected to SBP-2 device"); |
| 1469 | |
| 1470 | return(0); |
| 1471 | |
| 1472 | } |
| 1473 | |
| 1474 | /* |
| 1475 | * This function is called in order to set the busy timeout (number of |
| 1476 | * retries to attempt) on the sbp2 device. |
| 1477 | */ |
| 1478 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) |
| 1479 | { |
| 1480 | quadlet_t data; |
| 1481 | |
| 1482 | SBP2_DEBUG("sbp2_set_busy_timeout"); |
| 1483 | |
| 1484 | /* |
| 1485 | * Ok, let's write to the target's busy timeout register |
| 1486 | */ |
| 1487 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
| 1488 | |
| 1489 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { |
| 1490 | SBP2_ERR("sbp2_set_busy_timeout error"); |
| 1491 | } |
| 1492 | |
| 1493 | return(0); |
| 1494 | } |
| 1495 | |
| 1496 | |
| 1497 | /* |
| 1498 | * This function is called to parse sbp2 device's config rom unit |
| 1499 | * directory. Used to determine things like sbp2 management agent offset, |
| 1500 | * and command set used (SCSI or RBC). |
| 1501 | */ |
| 1502 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, |
| 1503 | struct unit_directory *ud) |
| 1504 | { |
| 1505 | struct csr1212_keyval *kv; |
| 1506 | struct csr1212_dentry *dentry; |
| 1507 | u64 management_agent_addr; |
| 1508 | u32 command_set_spec_id, command_set, unit_characteristics, |
| 1509 | firmware_revision, workarounds; |
| 1510 | int i; |
| 1511 | |
| 1512 | SBP2_DEBUG("sbp2_parse_unit_directory"); |
| 1513 | |
| 1514 | management_agent_addr = 0x0; |
| 1515 | command_set_spec_id = 0x0; |
| 1516 | command_set = 0x0; |
| 1517 | unit_characteristics = 0x0; |
| 1518 | firmware_revision = 0x0; |
| 1519 | |
| 1520 | /* Handle different fields in the unit directory, based on keys */ |
| 1521 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
| 1522 | switch (kv->key.id) { |
| 1523 | case CSR1212_KV_ID_DEPENDENT_INFO: |
| 1524 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { |
| 1525 | /* Save off the management agent address */ |
| 1526 | management_agent_addr = |
| 1527 | CSR1212_REGISTER_SPACE_BASE + |
| 1528 | (kv->value.csr_offset << 2); |
| 1529 | |
| 1530 | SBP2_DEBUG("sbp2_management_agent_addr = %x", |
| 1531 | (unsigned int) management_agent_addr); |
| 1532 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
| 1533 | scsi_id->sbp2_device_type_and_lun = kv->value.immediate; |
| 1534 | } |
| 1535 | break; |
| 1536 | |
| 1537 | case SBP2_COMMAND_SET_SPEC_ID_KEY: |
| 1538 | /* Command spec organization */ |
| 1539 | command_set_spec_id = kv->value.immediate; |
| 1540 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", |
| 1541 | (unsigned int) command_set_spec_id); |
| 1542 | break; |
| 1543 | |
| 1544 | case SBP2_COMMAND_SET_KEY: |
| 1545 | /* Command set used by sbp2 device */ |
| 1546 | command_set = kv->value.immediate; |
| 1547 | SBP2_DEBUG("sbp2_command_set = %x", |
| 1548 | (unsigned int) command_set); |
| 1549 | break; |
| 1550 | |
| 1551 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
| 1552 | /* |
| 1553 | * Unit characterisitcs (orb related stuff |
| 1554 | * that I'm not yet paying attention to) |
| 1555 | */ |
| 1556 | unit_characteristics = kv->value.immediate; |
| 1557 | SBP2_DEBUG("sbp2_unit_characteristics = %x", |
| 1558 | (unsigned int) unit_characteristics); |
| 1559 | break; |
| 1560 | |
| 1561 | case SBP2_FIRMWARE_REVISION_KEY: |
| 1562 | /* Firmware revision */ |
| 1563 | firmware_revision = kv->value.immediate; |
| 1564 | if (force_inquiry_hack) |
| 1565 | SBP2_INFO("sbp2_firmware_revision = %x", |
| 1566 | (unsigned int) firmware_revision); |
| 1567 | else SBP2_DEBUG("sbp2_firmware_revision = %x", |
| 1568 | (unsigned int) firmware_revision); |
| 1569 | break; |
| 1570 | |
| 1571 | default: |
| 1572 | break; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* This is the start of our broken device checking. We try to hack |
| 1577 | * around oddities and known defects. */ |
| 1578 | workarounds = 0x0; |
| 1579 | |
| 1580 | /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a |
| 1581 | * bridge with 128KB max transfer size limitation. For sanity, we |
| 1582 | * only voice this when the current max_sectors setting |
| 1583 | * exceeds the 128k limit. By default, that is not the case. |
| 1584 | * |
| 1585 | * It would be really nice if we could detect this before the scsi |
| 1586 | * host gets initialized. That way we can down-force the |
| 1587 | * max_sectors to account for it. That is not currently |
| 1588 | * possible. */ |
| 1589 | if ((firmware_revision & 0xffff00) == |
| 1590 | SBP2_128KB_BROKEN_FIRMWARE && |
| 1591 | (max_sectors * 512) > (128*1024)) { |
| 1592 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", |
| 1593 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); |
| 1594 | SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", |
| 1595 | max_sectors); |
| 1596 | workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; |
| 1597 | } |
| 1598 | |
| 1599 | /* Check for a blacklisted set of devices that require us to force |
| 1600 | * a 36 byte host inquiry. This can be overriden as a module param |
| 1601 | * (to force all hosts). */ |
| 1602 | for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { |
| 1603 | if ((firmware_revision & 0xffff00) == |
| 1604 | sbp2_broken_inquiry_list[i]) { |
| 1605 | SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", |
| 1606 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); |
| 1607 | workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; |
| 1608 | break; /* No need to continue. */ |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | /* If this is a logical unit directory entry, process the parent |
| 1613 | * to get the values. */ |
| 1614 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { |
| 1615 | struct unit_directory *parent_ud = |
| 1616 | container_of(ud->device.parent, struct unit_directory, device); |
| 1617 | sbp2_parse_unit_directory(scsi_id, parent_ud); |
| 1618 | } else { |
| 1619 | scsi_id->sbp2_management_agent_addr = management_agent_addr; |
| 1620 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; |
| 1621 | scsi_id->sbp2_command_set = command_set; |
| 1622 | scsi_id->sbp2_unit_characteristics = unit_characteristics; |
| 1623 | scsi_id->sbp2_firmware_revision = firmware_revision; |
| 1624 | scsi_id->workarounds = workarounds; |
| 1625 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
| 1626 | scsi_id->sbp2_device_type_and_lun = ud->lun; |
| 1627 | } |
| 1628 | } |
| 1629 | |
| 1630 | /* |
| 1631 | * This function is called in order to determine the max speed and packet |
| 1632 | * size we can use in our ORBs. Note, that we (the driver and host) only |
| 1633 | * initiate the transaction. The SBP-2 device actually transfers the data |
| 1634 | * (by reading from the DMA area we tell it). This means that the SBP-2 |
| 1635 | * device decides the actual maximum data it can transfer. We just tell it |
| 1636 | * the speed that it needs to use, and the max_rec the host supports, and |
| 1637 | * it takes care of the rest. |
| 1638 | */ |
| 1639 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) |
| 1640 | { |
| 1641 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1642 | |
| 1643 | SBP2_DEBUG("sbp2_max_speed_and_size"); |
| 1644 | |
| 1645 | /* Initial setting comes from the hosts speed map */ |
| 1646 | scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 |
| 1647 | + NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
| 1648 | |
| 1649 | /* Bump down our speed if the user requested it */ |
| 1650 | if (scsi_id->speed_code > max_speed) { |
| 1651 | scsi_id->speed_code = max_speed; |
| 1652 | SBP2_ERR("Forcing SBP-2 max speed down to %s", |
| 1653 | hpsb_speedto_str[scsi_id->speed_code]); |
| 1654 | } |
| 1655 | |
| 1656 | /* Payload size is the lesser of what our speed supports and what |
| 1657 | * our host supports. */ |
| 1658 | scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
| 1659 | (u8)(hi->host->csr.max_rec - 1)); |
| 1660 | |
| 1661 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
| 1662 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), |
| 1663 | hpsb_speedto_str[scsi_id->speed_code], |
| 1664 | 1 << ((u32)scsi_id->max_payload_size + 2)); |
| 1665 | |
| 1666 | return(0); |
| 1667 | } |
| 1668 | |
| 1669 | /* |
| 1670 | * This function is called in order to perform a SBP-2 agent reset. |
| 1671 | */ |
| 1672 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) |
| 1673 | { |
| 1674 | quadlet_t data; |
| 1675 | u64 addr; |
| 1676 | int retval; |
| 1677 | |
| 1678 | SBP2_DEBUG("sbp2_agent_reset"); |
| 1679 | |
| 1680 | /* |
| 1681 | * Ok, let's write to the target's management agent register |
| 1682 | */ |
| 1683 | data = ntohl(SBP2_AGENT_RESET_DATA); |
| 1684 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
| 1685 | |
| 1686 | if (wait) |
| 1687 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); |
| 1688 | else |
| 1689 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); |
| 1690 | |
| 1691 | if (retval < 0) { |
| 1692 | SBP2_ERR("hpsb_node_write failed.\n"); |
| 1693 | return -EIO; |
| 1694 | } |
| 1695 | |
| 1696 | /* |
| 1697 | * Need to make sure orb pointer is written on next command |
| 1698 | */ |
| 1699 | scsi_id->last_orb = NULL; |
| 1700 | |
| 1701 | return(0); |
| 1702 | } |
| 1703 | |
| 1704 | /* |
| 1705 | * This function is called to create the actual command orb and s/g list |
| 1706 | * out of the scsi command itself. |
| 1707 | */ |
| 1708 | static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
| 1709 | struct sbp2_command_info *command, |
| 1710 | unchar *scsi_cmd, |
| 1711 | unsigned int scsi_use_sg, |
| 1712 | unsigned int scsi_request_bufflen, |
| 1713 | void *scsi_request_buffer, |
| 1714 | enum dma_data_direction dma_dir) |
| 1715 | |
| 1716 | { |
| 1717 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1718 | struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer; |
| 1719 | struct sbp2_command_orb *command_orb = &command->command_orb; |
| 1720 | struct sbp2_unrestricted_page_table *scatter_gather_element = |
| 1721 | &command->scatter_gather_element[0]; |
| 1722 | u32 sg_count, sg_len, orb_direction; |
| 1723 | dma_addr_t sg_addr; |
| 1724 | int i; |
| 1725 | |
| 1726 | /* |
| 1727 | * Set-up our command ORB.. |
| 1728 | * |
| 1729 | * NOTE: We're doing unrestricted page tables (s/g), as this is |
| 1730 | * best performance (at least with the devices I have). This means |
| 1731 | * that data_size becomes the number of s/g elements, and |
| 1732 | * page_size should be zero (for unrestricted). |
| 1733 | */ |
| 1734 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
| 1735 | command_orb->next_ORB_lo = 0x0; |
| 1736 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); |
| 1737 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); |
| 1738 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
| 1739 | |
| 1740 | /* |
| 1741 | * Get the direction of the transfer. If the direction is unknown, then use our |
| 1742 | * goofy table as a back-up. |
| 1743 | */ |
| 1744 | switch (dma_dir) { |
| 1745 | case DMA_NONE: |
| 1746 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
| 1747 | break; |
| 1748 | case DMA_TO_DEVICE: |
| 1749 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
| 1750 | break; |
| 1751 | case DMA_FROM_DEVICE: |
| 1752 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
| 1753 | break; |
| 1754 | case DMA_BIDIRECTIONAL: |
| 1755 | default: |
| 1756 | SBP2_ERR("SCSI data transfer direction not specified. " |
| 1757 | "Update the SBP2 direction table in sbp2.h if " |
| 1758 | "necessary for your application"); |
| 1759 | __scsi_print_command(scsi_cmd); |
| 1760 | orb_direction = sbp2scsi_direction_table[*scsi_cmd]; |
| 1761 | break; |
| 1762 | } |
| 1763 | |
| 1764 | /* |
| 1765 | * Set-up our pagetable stuff... unfortunately, this has become |
| 1766 | * messier than I'd like. Need to clean this up a bit. ;-) |
| 1767 | */ |
| 1768 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
| 1769 | |
| 1770 | SBP2_DEBUG("No data transfer"); |
| 1771 | |
| 1772 | /* |
| 1773 | * Handle no data transfer |
| 1774 | */ |
| 1775 | command_orb->data_descriptor_hi = 0x0; |
| 1776 | command_orb->data_descriptor_lo = 0x0; |
| 1777 | command_orb->misc |= ORB_SET_DIRECTION(1); |
| 1778 | |
| 1779 | } else if (scsi_use_sg) { |
| 1780 | |
| 1781 | SBP2_DEBUG("Use scatter/gather"); |
| 1782 | |
| 1783 | /* |
| 1784 | * Special case if only one element (and less than 64KB in size) |
| 1785 | */ |
| 1786 | if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { |
| 1787 | |
| 1788 | SBP2_DEBUG("Only one s/g element"); |
| 1789 | command->dma_dir = dma_dir; |
| 1790 | command->dma_size = sgpnt[0].length; |
| 1791 | command->dma_type = CMD_DMA_PAGE; |
| 1792 | command->cmd_dma = pci_map_page(hi->host->pdev, |
| 1793 | sgpnt[0].page, |
| 1794 | sgpnt[0].offset, |
| 1795 | command->dma_size, |
| 1796 | command->dma_dir); |
| 1797 | SBP2_DMA_ALLOC("single page scatter element"); |
| 1798 | |
| 1799 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1800 | command_orb->data_descriptor_lo = command->cmd_dma; |
| 1801 | command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); |
| 1802 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1803 | |
| 1804 | } else { |
| 1805 | int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir); |
| 1806 | SBP2_DMA_ALLOC("scatter list"); |
| 1807 | |
| 1808 | command->dma_size = scsi_use_sg; |
| 1809 | command->dma_dir = dma_dir; |
| 1810 | command->sge_buffer = sgpnt; |
| 1811 | |
| 1812 | /* use page tables (s/g) */ |
| 1813 | command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
| 1814 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1815 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1816 | command_orb->data_descriptor_lo = command->sge_dma; |
| 1817 | |
| 1818 | /* |
| 1819 | * Loop through and fill out our sbp-2 page tables |
| 1820 | * (and split up anything too large) |
| 1821 | */ |
| 1822 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { |
| 1823 | sg_len = sg_dma_len(sgpnt); |
| 1824 | sg_addr = sg_dma_address(sgpnt); |
| 1825 | while (sg_len) { |
| 1826 | scatter_gather_element[sg_count].segment_base_lo = sg_addr; |
| 1827 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1828 | scatter_gather_element[sg_count].length_segment_base_hi = |
| 1829 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1830 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1831 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1832 | } else { |
| 1833 | scatter_gather_element[sg_count].length_segment_base_hi = |
| 1834 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| 1835 | sg_len = 0; |
| 1836 | } |
| 1837 | sg_count++; |
| 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | /* Number of page table (s/g) elements */ |
| 1842 | command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| 1843 | |
| 1844 | sbp2util_packet_dump(scatter_gather_element, |
| 1845 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, |
| 1846 | "sbp2 s/g list", command->sge_dma); |
| 1847 | |
| 1848 | /* |
| 1849 | * Byte swap page tables if necessary |
| 1850 | */ |
| 1851 | sbp2util_cpu_to_be32_buffer(scatter_gather_element, |
| 1852 | (sizeof(struct sbp2_unrestricted_page_table)) * |
| 1853 | sg_count); |
| 1854 | |
| 1855 | } |
| 1856 | |
| 1857 | } else { |
| 1858 | |
| 1859 | SBP2_DEBUG("No scatter/gather"); |
| 1860 | |
| 1861 | command->dma_dir = dma_dir; |
| 1862 | command->dma_size = scsi_request_bufflen; |
| 1863 | command->dma_type = CMD_DMA_SINGLE; |
| 1864 | command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer, |
| 1865 | command->dma_size, |
| 1866 | command->dma_dir); |
| 1867 | SBP2_DMA_ALLOC("single bulk"); |
| 1868 | |
| 1869 | /* |
| 1870 | * Handle case where we get a command w/o s/g enabled (but |
| 1871 | * check for transfers larger than 64K) |
| 1872 | */ |
| 1873 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1874 | |
| 1875 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1876 | command_orb->data_descriptor_lo = command->cmd_dma; |
| 1877 | command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); |
| 1878 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1879 | |
| 1880 | /* |
| 1881 | * Sanity, in case our direction table is not |
| 1882 | * up-to-date |
| 1883 | */ |
| 1884 | if (!scsi_request_bufflen) { |
| 1885 | command_orb->data_descriptor_hi = 0x0; |
| 1886 | command_orb->data_descriptor_lo = 0x0; |
| 1887 | command_orb->misc |= ORB_SET_DIRECTION(1); |
| 1888 | } |
| 1889 | |
| 1890 | } else { |
| 1891 | /* |
| 1892 | * Need to turn this into page tables, since the |
| 1893 | * buffer is too large. |
| 1894 | */ |
| 1895 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1896 | command_orb->data_descriptor_lo = command->sge_dma; |
| 1897 | |
| 1898 | /* Use page tables (s/g) */ |
| 1899 | command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
| 1900 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1901 | |
| 1902 | /* |
| 1903 | * fill out our sbp-2 page tables (and split up |
| 1904 | * the large buffer) |
| 1905 | */ |
| 1906 | sg_count = 0; |
| 1907 | sg_len = scsi_request_bufflen; |
| 1908 | sg_addr = command->cmd_dma; |
| 1909 | while (sg_len) { |
| 1910 | scatter_gather_element[sg_count].segment_base_lo = sg_addr; |
| 1911 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1912 | scatter_gather_element[sg_count].length_segment_base_hi = |
| 1913 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1914 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1915 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1916 | } else { |
| 1917 | scatter_gather_element[sg_count].length_segment_base_hi = |
| 1918 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| 1919 | sg_len = 0; |
| 1920 | } |
| 1921 | sg_count++; |
| 1922 | } |
| 1923 | |
| 1924 | /* Number of page table (s/g) elements */ |
| 1925 | command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| 1926 | |
| 1927 | sbp2util_packet_dump(scatter_gather_element, |
| 1928 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, |
| 1929 | "sbp2 s/g list", command->sge_dma); |
| 1930 | |
| 1931 | /* |
| 1932 | * Byte swap page tables if necessary |
| 1933 | */ |
| 1934 | sbp2util_cpu_to_be32_buffer(scatter_gather_element, |
| 1935 | (sizeof(struct sbp2_unrestricted_page_table)) * |
| 1936 | sg_count); |
| 1937 | |
| 1938 | } |
| 1939 | |
| 1940 | } |
| 1941 | |
| 1942 | /* |
| 1943 | * Byte swap command ORB if necessary |
| 1944 | */ |
| 1945 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
| 1946 | |
| 1947 | /* |
| 1948 | * Put our scsi command in the command ORB |
| 1949 | */ |
| 1950 | memset(command_orb->cdb, 0, 12); |
| 1951 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); |
| 1952 | |
| 1953 | return(0); |
| 1954 | } |
| 1955 | |
| 1956 | /* |
| 1957 | * This function is called in order to begin a regular SBP-2 command. |
| 1958 | */ |
| 1959 | static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
| 1960 | struct sbp2_command_info *command) |
| 1961 | { |
| 1962 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 1963 | struct sbp2_command_orb *command_orb = &command->command_orb; |
| 1964 | struct node_entry *ne = scsi_id->ne; |
| 1965 | u64 addr; |
| 1966 | |
| 1967 | outstanding_orb_incr; |
| 1968 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", |
| 1969 | command_orb, global_outstanding_command_orbs); |
| 1970 | |
| 1971 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, |
| 1972 | sizeof(struct sbp2_command_orb), |
| 1973 | PCI_DMA_BIDIRECTIONAL); |
| 1974 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
| 1975 | sizeof(command->scatter_gather_element), |
| 1976 | PCI_DMA_BIDIRECTIONAL); |
| 1977 | /* |
| 1978 | * Check to see if there are any previous orbs to use |
| 1979 | */ |
| 1980 | if (scsi_id->last_orb == NULL) { |
| 1981 | quadlet_t data[2]; |
| 1982 | |
| 1983 | /* |
| 1984 | * Ok, let's write to the target's management agent register |
| 1985 | */ |
| 1986 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; |
| 1987 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| 1988 | data[1] = command->command_orb_dma; |
| 1989 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1990 | |
| 1991 | SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); |
| 1992 | |
| 1993 | if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { |
| 1994 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); |
| 1995 | return -EIO; |
| 1996 | } |
| 1997 | |
| 1998 | SBP2_ORB_DEBUG("write command agent complete"); |
| 1999 | |
| 2000 | scsi_id->last_orb = command_orb; |
| 2001 | scsi_id->last_orb_dma = command->command_orb_dma; |
| 2002 | |
| 2003 | } else { |
| 2004 | quadlet_t data; |
| 2005 | |
| 2006 | /* |
| 2007 | * We have an orb already sent (maybe or maybe not |
| 2008 | * processed) that we can append this orb to. So do so, |
| 2009 | * and ring the doorbell. Have to be very careful |
| 2010 | * modifying these next orb pointers, as they are accessed |
| 2011 | * both by the sbp2 device and us. |
| 2012 | */ |
| 2013 | scsi_id->last_orb->next_ORB_lo = |
| 2014 | cpu_to_be32(command->command_orb_dma); |
| 2015 | /* Tells hardware that this pointer is valid */ |
| 2016 | scsi_id->last_orb->next_ORB_hi = 0x0; |
| 2017 | pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma, |
| 2018 | sizeof(struct sbp2_command_orb), |
| 2019 | PCI_DMA_BIDIRECTIONAL); |
| 2020 | |
| 2021 | /* |
| 2022 | * Ring the doorbell |
| 2023 | */ |
| 2024 | data = cpu_to_be32(command->command_orb_dma); |
| 2025 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; |
| 2026 | |
| 2027 | SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); |
| 2028 | |
| 2029 | if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { |
| 2030 | SBP2_ERR("sbp2util_node_write_no_wait failed"); |
| 2031 | return(-EIO); |
| 2032 | } |
| 2033 | |
| 2034 | scsi_id->last_orb = command_orb; |
| 2035 | scsi_id->last_orb_dma = command->command_orb_dma; |
| 2036 | |
| 2037 | } |
| 2038 | return(0); |
| 2039 | } |
| 2040 | |
| 2041 | /* |
| 2042 | * This function is called in order to begin a regular SBP-2 command. |
| 2043 | */ |
| 2044 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, |
| 2045 | struct scsi_cmnd *SCpnt, |
| 2046 | void (*done)(struct scsi_cmnd *)) |
| 2047 | { |
| 2048 | unchar *cmd = (unchar *) SCpnt->cmnd; |
| 2049 | unsigned int request_bufflen = SCpnt->request_bufflen; |
| 2050 | struct sbp2_command_info *command; |
| 2051 | |
| 2052 | SBP2_DEBUG("sbp2_send_command"); |
| 2053 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) |
| 2054 | printk("[scsi command]\n "); |
| 2055 | scsi_print_command(SCpnt); |
| 2056 | #endif |
| 2057 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
| 2058 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); |
| 2059 | |
| 2060 | /* |
| 2061 | * Allocate a command orb and s/g structure |
| 2062 | */ |
| 2063 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); |
| 2064 | if (!command) { |
| 2065 | return(-EIO); |
| 2066 | } |
| 2067 | |
| 2068 | /* |
| 2069 | * The scsi stack sends down a request_bufflen which does not match the |
| 2070 | * length field in the scsi cdb. This causes some sbp2 devices to |
| 2071 | * reject this inquiry command. Fix the request_bufflen. |
| 2072 | */ |
| 2073 | if (*cmd == INQUIRY) { |
| 2074 | if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) |
| 2075 | request_bufflen = cmd[4] = 0x24; |
| 2076 | else |
| 2077 | request_bufflen = cmd[4]; |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * Now actually fill in the comamnd orb and sbp2 s/g list |
| 2082 | */ |
| 2083 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, |
| 2084 | request_bufflen, SCpnt->request_buffer, |
| 2085 | SCpnt->sc_data_direction); |
| 2086 | /* |
| 2087 | * Update our cdb if necessary (to handle sbp2 RBC command set |
| 2088 | * differences). This is where the command set hacks go! =) |
| 2089 | */ |
| 2090 | sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb); |
| 2091 | |
| 2092 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), |
| 2093 | "sbp2 command orb", command->command_orb_dma); |
| 2094 | |
| 2095 | /* |
| 2096 | * Initialize status fifo |
| 2097 | */ |
| 2098 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| 2099 | |
| 2100 | /* |
| 2101 | * Link up the orb, and ring the doorbell if needed |
| 2102 | */ |
| 2103 | sbp2_link_orb_command(scsi_id, command); |
| 2104 | |
| 2105 | return(0); |
| 2106 | } |
| 2107 | |
| 2108 | |
| 2109 | /* |
| 2110 | * This function deals with command set differences between Linux scsi |
| 2111 | * command set and sbp2 RBC command set. |
| 2112 | */ |
| 2113 | static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd) |
| 2114 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | |
| 2117 | /* |
| 2118 | * Translates SBP-2 status into SCSI sense data for check conditions |
| 2119 | */ |
| 2120 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) |
| 2121 | { |
| 2122 | SBP2_DEBUG("sbp2_status_to_sense_data"); |
| 2123 | |
| 2124 | /* |
| 2125 | * Ok, it's pretty ugly... ;-) |
| 2126 | */ |
| 2127 | sense_data[0] = 0x70; |
| 2128 | sense_data[1] = 0x0; |
| 2129 | sense_data[2] = sbp2_status[9]; |
| 2130 | sense_data[3] = sbp2_status[12]; |
| 2131 | sense_data[4] = sbp2_status[13]; |
| 2132 | sense_data[5] = sbp2_status[14]; |
| 2133 | sense_data[6] = sbp2_status[15]; |
| 2134 | sense_data[7] = 10; |
| 2135 | sense_data[8] = sbp2_status[16]; |
| 2136 | sense_data[9] = sbp2_status[17]; |
| 2137 | sense_data[10] = sbp2_status[18]; |
| 2138 | sense_data[11] = sbp2_status[19]; |
| 2139 | sense_data[12] = sbp2_status[10]; |
| 2140 | sense_data[13] = sbp2_status[11]; |
| 2141 | sense_data[14] = sbp2_status[20]; |
| 2142 | sense_data[15] = sbp2_status[21]; |
| 2143 | |
| 2144 | return(sbp2_status[8] & 0x3f); /* return scsi status */ |
| 2145 | } |
| 2146 | |
| 2147 | /* |
| 2148 | * This function is called after a command is completed, in order to do any necessary SBP-2 |
| 2149 | * response data translations for the SCSI stack |
| 2150 | */ |
| 2151 | static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, |
| 2152 | struct scsi_cmnd *SCpnt) |
| 2153 | { |
| 2154 | u8 *scsi_buf = SCpnt->request_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | |
| 2156 | SBP2_DEBUG("sbp2_check_sbp2_response"); |
| 2157 | |
| 2158 | switch (SCpnt->cmnd[0]) { |
| 2159 | |
| 2160 | case INQUIRY: |
| 2161 | |
| 2162 | /* |
| 2163 | * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill |
| 2164 | * this information in from the inquiry response data. Lun is set to zero. |
| 2165 | */ |
| 2166 | if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { |
| 2167 | SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data"); |
| 2168 | scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16; |
| 2169 | } |
| 2170 | |
| 2171 | /* |
| 2172 | * Make sure data length is ok. Minimum length is 36 bytes |
| 2173 | */ |
| 2174 | if (scsi_buf[4] == 0) { |
| 2175 | scsi_buf[4] = 36 - 5; |
| 2176 | } |
| 2177 | |
| 2178 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | * Fix ansi revision and response data format |
| 2180 | */ |
| 2181 | scsi_buf[2] |= 2; |
| 2182 | scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; |
| 2183 | |
| 2184 | break; |
| 2185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | default: |
| 2187 | break; |
| 2188 | } |
| 2189 | return; |
| 2190 | } |
| 2191 | |
| 2192 | /* |
| 2193 | * This function deals with status writes from the SBP-2 device |
| 2194 | */ |
| 2195 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, |
| 2196 | quadlet_t *data, u64 addr, size_t length, u16 fl) |
| 2197 | { |
| 2198 | struct sbp2scsi_host_info *hi; |
| 2199 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; |
| 2200 | u32 id; |
| 2201 | struct scsi_cmnd *SCpnt = NULL; |
| 2202 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
| 2203 | struct sbp2_command_info *command; |
| 2204 | |
| 2205 | SBP2_DEBUG("sbp2_handle_status_write"); |
| 2206 | |
| 2207 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); |
| 2208 | |
| 2209 | if (!host) { |
| 2210 | SBP2_ERR("host is NULL - this is bad!"); |
| 2211 | return(RCODE_ADDRESS_ERROR); |
| 2212 | } |
| 2213 | |
| 2214 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
| 2215 | |
| 2216 | if (!hi) { |
| 2217 | SBP2_ERR("host info is NULL - this is bad!"); |
| 2218 | return(RCODE_ADDRESS_ERROR); |
| 2219 | } |
| 2220 | |
| 2221 | /* |
| 2222 | * Find our scsi_id structure by looking at the status fifo address written to by |
| 2223 | * the sbp2 device. |
| 2224 | */ |
| 2225 | id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); |
| 2226 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
| 2227 | if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { |
| 2228 | scsi_id = scsi_id_tmp; |
| 2229 | break; |
| 2230 | } |
| 2231 | } |
| 2232 | |
| 2233 | if (!scsi_id) { |
| 2234 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
| 2235 | return(RCODE_ADDRESS_ERROR); |
| 2236 | } |
| 2237 | |
| 2238 | /* |
| 2239 | * Put response into scsi_id status fifo... |
| 2240 | */ |
| 2241 | memcpy(&scsi_id->status_block, data, length); |
| 2242 | |
| 2243 | /* |
| 2244 | * Byte swap first two quadlets (8 bytes) of status for processing |
| 2245 | */ |
| 2246 | sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); |
| 2247 | |
| 2248 | /* |
| 2249 | * Handle command ORB status here if necessary. First, need to match status with command. |
| 2250 | */ |
| 2251 | command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); |
| 2252 | if (command) { |
| 2253 | |
| 2254 | SBP2_DEBUG("Found status for command ORB"); |
| 2255 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, |
| 2256 | sizeof(struct sbp2_command_orb), |
| 2257 | PCI_DMA_BIDIRECTIONAL); |
| 2258 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
| 2259 | sizeof(command->scatter_gather_element), |
| 2260 | PCI_DMA_BIDIRECTIONAL); |
| 2261 | |
| 2262 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); |
| 2263 | outstanding_orb_decr; |
| 2264 | |
| 2265 | /* |
| 2266 | * Matched status with command, now grab scsi command pointers and check status |
| 2267 | */ |
| 2268 | SCpnt = command->Current_SCpnt; |
| 2269 | sbp2util_mark_command_completed(scsi_id, command); |
| 2270 | |
| 2271 | if (SCpnt) { |
| 2272 | |
| 2273 | /* |
| 2274 | * See if the target stored any scsi status information |
| 2275 | */ |
| 2276 | if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { |
| 2277 | /* |
| 2278 | * Translate SBP-2 status to SCSI sense data |
| 2279 | */ |
| 2280 | SBP2_DEBUG("CHECK CONDITION"); |
| 2281 | scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); |
| 2282 | } |
| 2283 | |
| 2284 | /* |
| 2285 | * Check to see if the dead bit is set. If so, we'll have to initiate |
| 2286 | * a fetch agent reset. |
| 2287 | */ |
| 2288 | if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { |
| 2289 | |
| 2290 | /* |
| 2291 | * Initiate a fetch agent reset. |
| 2292 | */ |
| 2293 | SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); |
| 2294 | sbp2_agent_reset(scsi_id, 0); |
| 2295 | } |
| 2296 | |
| 2297 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); |
| 2298 | } |
| 2299 | |
| 2300 | /* |
| 2301 | * Check here to see if there are no commands in-use. If there are none, we can |
| 2302 | * null out last orb so that next time around we write directly to the orb pointer... |
| 2303 | * Quick start saves one 1394 bus transaction. |
| 2304 | */ |
| 2305 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| 2306 | scsi_id->last_orb = NULL; |
| 2307 | } |
| 2308 | |
| 2309 | } else { |
| 2310 | |
| 2311 | /* |
| 2312 | * It's probably a login/logout/reconnect status. |
| 2313 | */ |
| 2314 | if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| 2315 | (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| 2316 | (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| 2317 | (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { |
| 2318 | atomic_set(&scsi_id->sbp2_login_complete, 1); |
| 2319 | } |
| 2320 | } |
| 2321 | |
| 2322 | if (SCpnt) { |
| 2323 | |
| 2324 | /* Complete the SCSI command. */ |
| 2325 | SBP2_DEBUG("Completing SCSI command"); |
| 2326 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, |
| 2327 | command->Current_done); |
| 2328 | SBP2_ORB_DEBUG("command orb completed"); |
| 2329 | } |
| 2330 | |
| 2331 | return(RCODE_COMPLETE); |
| 2332 | } |
| 2333 | |
| 2334 | |
| 2335 | /************************************** |
| 2336 | * SCSI interface related section |
| 2337 | **************************************/ |
| 2338 | |
| 2339 | /* |
| 2340 | * This routine is the main request entry routine for doing I/O. It is |
| 2341 | * called from the scsi stack directly. |
| 2342 | */ |
| 2343 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| 2344 | void (*done)(struct scsi_cmnd *)) |
| 2345 | { |
| 2346 | struct scsi_id_instance_data *scsi_id = |
| 2347 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| 2348 | struct sbp2scsi_host_info *hi; |
| 2349 | |
| 2350 | SBP2_DEBUG("sbp2scsi_queuecommand"); |
| 2351 | |
| 2352 | /* |
| 2353 | * If scsi_id is null, it means there is no device in this slot, |
| 2354 | * so we should return selection timeout. |
| 2355 | */ |
| 2356 | if (!scsi_id) { |
| 2357 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2358 | done (SCpnt); |
| 2359 | return 0; |
| 2360 | } |
| 2361 | |
| 2362 | hi = scsi_id->hi; |
| 2363 | |
| 2364 | if (!hi) { |
| 2365 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); |
| 2366 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2367 | done (SCpnt); |
| 2368 | return(0); |
| 2369 | } |
| 2370 | |
| 2371 | /* |
| 2372 | * Until we handle multiple luns, just return selection time-out |
| 2373 | * to any IO directed at non-zero LUNs |
| 2374 | */ |
| 2375 | if (SCpnt->device->lun) { |
| 2376 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2377 | done (SCpnt); |
| 2378 | return(0); |
| 2379 | } |
| 2380 | |
| 2381 | /* |
| 2382 | * Check for request sense command, and handle it here |
| 2383 | * (autorequest sense) |
| 2384 | */ |
| 2385 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { |
| 2386 | SBP2_DEBUG("REQUEST_SENSE"); |
| 2387 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); |
| 2388 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); |
| 2389 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); |
| 2390 | return(0); |
| 2391 | } |
| 2392 | |
| 2393 | /* |
| 2394 | * Check to see if we are in the middle of a bus reset. |
| 2395 | */ |
| 2396 | if (!hpsb_node_entry_valid(scsi_id->ne)) { |
| 2397 | SBP2_ERR("Bus reset in progress - rejecting command"); |
| 2398 | SCpnt->result = DID_BUS_BUSY << 16; |
| 2399 | done (SCpnt); |
| 2400 | return(0); |
| 2401 | } |
| 2402 | |
| 2403 | /* |
| 2404 | * Try and send our SCSI command |
| 2405 | */ |
| 2406 | if (sbp2_send_command(scsi_id, SCpnt, done)) { |
| 2407 | SBP2_ERR("Error sending SCSI command"); |
| 2408 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, |
| 2409 | SCpnt, done); |
| 2410 | } |
| 2411 | |
| 2412 | return(0); |
| 2413 | } |
| 2414 | |
| 2415 | /* |
| 2416 | * This function is called in order to complete all outstanding SBP-2 |
| 2417 | * commands (in case of resets, etc.). |
| 2418 | */ |
| 2419 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, |
| 2420 | u32 status) |
| 2421 | { |
| 2422 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 2423 | struct list_head *lh; |
| 2424 | struct sbp2_command_info *command; |
| 2425 | |
| 2426 | SBP2_DEBUG("sbp2scsi_complete_all_commands"); |
| 2427 | |
| 2428 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| 2429 | SBP2_DEBUG("Found pending command to complete"); |
| 2430 | lh = scsi_id->sbp2_command_orb_inuse.next; |
| 2431 | command = list_entry(lh, struct sbp2_command_info, list); |
| 2432 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, |
| 2433 | sizeof(struct sbp2_command_orb), |
| 2434 | PCI_DMA_BIDIRECTIONAL); |
| 2435 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
| 2436 | sizeof(command->scatter_gather_element), |
| 2437 | PCI_DMA_BIDIRECTIONAL); |
| 2438 | sbp2util_mark_command_completed(scsi_id, command); |
| 2439 | if (command->Current_SCpnt) { |
| 2440 | command->Current_SCpnt->result = status << 16; |
| 2441 | command->Current_done(command->Current_SCpnt); |
| 2442 | } |
| 2443 | } |
| 2444 | |
| 2445 | return; |
| 2446 | } |
| 2447 | |
| 2448 | /* |
| 2449 | * This function is called in order to complete a regular SBP-2 command. |
| 2450 | * |
| 2451 | * This can be called in interrupt context. |
| 2452 | */ |
| 2453 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, |
| 2454 | u32 scsi_status, struct scsi_cmnd *SCpnt, |
| 2455 | void (*done)(struct scsi_cmnd *)) |
| 2456 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | SBP2_DEBUG("sbp2scsi_complete_command"); |
| 2458 | |
| 2459 | /* |
| 2460 | * Sanity |
| 2461 | */ |
| 2462 | if (!SCpnt) { |
| 2463 | SBP2_ERR("SCpnt is NULL"); |
| 2464 | return; |
| 2465 | } |
| 2466 | |
| 2467 | /* |
| 2468 | * If a bus reset is in progress and there was an error, don't |
| 2469 | * complete the command, just let it get retried at the end of the |
| 2470 | * bus reset. |
| 2471 | */ |
| 2472 | if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
| 2473 | SBP2_ERR("Bus reset in progress - retry command later"); |
| 2474 | return; |
| 2475 | } |
| 2476 | |
| 2477 | /* |
| 2478 | * Switch on scsi status |
| 2479 | */ |
| 2480 | switch (scsi_status) { |
| 2481 | case SBP2_SCSI_STATUS_GOOD: |
| 2482 | SCpnt->result = DID_OK; |
| 2483 | break; |
| 2484 | |
| 2485 | case SBP2_SCSI_STATUS_BUSY: |
| 2486 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); |
| 2487 | SCpnt->result = DID_BUS_BUSY << 16; |
| 2488 | break; |
| 2489 | |
| 2490 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
| 2491 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); |
| 2492 | SCpnt->result = CHECK_CONDITION << 1; |
| 2493 | |
| 2494 | /* |
| 2495 | * Debug stuff |
| 2496 | */ |
| 2497 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
| 2498 | scsi_print_command(SCpnt); |
| 2499 | scsi_print_sense("bh", SCpnt); |
| 2500 | #endif |
| 2501 | |
| 2502 | break; |
| 2503 | |
| 2504 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
| 2505 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); |
| 2506 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2507 | scsi_print_command(SCpnt); |
| 2508 | break; |
| 2509 | |
| 2510 | case SBP2_SCSI_STATUS_CONDITION_MET: |
| 2511 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: |
| 2512 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: |
| 2513 | SBP2_ERR("Bad SCSI status = %x", scsi_status); |
| 2514 | SCpnt->result = DID_ERROR << 16; |
| 2515 | scsi_print_command(SCpnt); |
| 2516 | break; |
| 2517 | |
| 2518 | default: |
| 2519 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); |
| 2520 | SCpnt->result = DID_ERROR << 16; |
| 2521 | } |
| 2522 | |
| 2523 | /* |
| 2524 | * Take care of any sbp2 response data mucking here (RBC stuff, etc.) |
| 2525 | */ |
| 2526 | if (SCpnt->result == DID_OK) { |
| 2527 | sbp2_check_sbp2_response(scsi_id, SCpnt); |
| 2528 | } |
| 2529 | |
| 2530 | /* |
| 2531 | * If a bus reset is in progress and there was an error, complete |
| 2532 | * the command as busy so that it will get retried. |
| 2533 | */ |
| 2534 | if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
| 2535 | SBP2_ERR("Completing command with busy (bus reset)"); |
| 2536 | SCpnt->result = DID_BUS_BUSY << 16; |
| 2537 | } |
| 2538 | |
| 2539 | /* |
| 2540 | * If a unit attention occurs, return busy status so it gets |
| 2541 | * retried... it could have happened because of a 1394 bus reset |
| 2542 | * or hot-plug... |
| 2543 | */ |
| 2544 | #if 0 |
| 2545 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && |
| 2546 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { |
| 2547 | SBP2_DEBUG("UNIT ATTENTION - return busy"); |
| 2548 | SCpnt->result = DID_BUS_BUSY << 16; |
| 2549 | } |
| 2550 | #endif |
| 2551 | |
| 2552 | /* |
| 2553 | * Tell scsi stack that we're done with this command |
| 2554 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | done (SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | } |
| 2557 | |
| 2558 | |
| 2559 | static int sbp2scsi_slave_configure (struct scsi_device *sdev) |
| 2560 | { |
| 2561 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2562 | sdev->use_10_for_rw = 1; |
| 2563 | sdev->use_10_for_ms = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | return 0; |
| 2565 | } |
| 2566 | |
| 2567 | |
| 2568 | /* |
| 2569 | * Called by scsi stack when something has really gone wrong. Usually |
| 2570 | * called when a command has timed-out for some reason. |
| 2571 | */ |
| 2572 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) |
| 2573 | { |
| 2574 | struct scsi_id_instance_data *scsi_id = |
| 2575 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| 2576 | struct sbp2scsi_host_info *hi = scsi_id->hi; |
| 2577 | struct sbp2_command_info *command; |
| 2578 | |
| 2579 | SBP2_ERR("aborting sbp2 command"); |
| 2580 | scsi_print_command(SCpnt); |
| 2581 | |
| 2582 | if (scsi_id) { |
| 2583 | |
| 2584 | /* |
| 2585 | * Right now, just return any matching command structures |
| 2586 | * to the free pool. |
| 2587 | */ |
| 2588 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
| 2589 | if (command) { |
| 2590 | SBP2_DEBUG("Found command to abort"); |
| 2591 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
| 2592 | command->command_orb_dma, |
| 2593 | sizeof(struct sbp2_command_orb), |
| 2594 | PCI_DMA_BIDIRECTIONAL); |
| 2595 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
| 2596 | command->sge_dma, |
| 2597 | sizeof(command->scatter_gather_element), |
| 2598 | PCI_DMA_BIDIRECTIONAL); |
| 2599 | sbp2util_mark_command_completed(scsi_id, command); |
| 2600 | if (command->Current_SCpnt) { |
| 2601 | command->Current_SCpnt->result = DID_ABORT << 16; |
| 2602 | command->Current_done(command->Current_SCpnt); |
| 2603 | } |
| 2604 | } |
| 2605 | |
| 2606 | /* |
| 2607 | * Initiate a fetch agent reset. |
| 2608 | */ |
| 2609 | sbp2_agent_reset(scsi_id, 0); |
| 2610 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
| 2611 | } |
| 2612 | |
| 2613 | return(SUCCESS); |
| 2614 | } |
| 2615 | |
| 2616 | /* |
| 2617 | * Called by scsi stack when something has really gone wrong. |
| 2618 | */ |
Jeff Garzik | 94d0e7b8 | 2005-05-28 07:55:48 -0400 | [diff] [blame] | 2619 | static int __sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | { |
| 2621 | struct scsi_id_instance_data *scsi_id = |
| 2622 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| 2623 | |
| 2624 | SBP2_ERR("reset requested"); |
| 2625 | |
| 2626 | if (scsi_id) { |
| 2627 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
| 2628 | sbp2_agent_reset(scsi_id, 0); |
| 2629 | } |
| 2630 | |
| 2631 | return(SUCCESS); |
| 2632 | } |
| 2633 | |
Jeff Garzik | 94d0e7b8 | 2005-05-28 07:55:48 -0400 | [diff] [blame] | 2634 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
| 2635 | { |
| 2636 | unsigned long flags; |
| 2637 | int rc; |
| 2638 | |
| 2639 | spin_lock_irqsave(SCpnt->device->host->host_lock, flags); |
| 2640 | rc = __sbp2scsi_reset(SCpnt); |
| 2641 | spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); |
| 2642 | |
| 2643 | return rc; |
| 2644 | } |
| 2645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | static const char *sbp2scsi_info (struct Scsi_Host *host) |
| 2647 | { |
| 2648 | return "SCSI emulation for IEEE-1394 SBP-2 Devices"; |
| 2649 | } |
| 2650 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 2651 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | { |
| 2653 | struct scsi_device *sdev; |
| 2654 | struct scsi_id_instance_data *scsi_id; |
| 2655 | int lun; |
| 2656 | |
| 2657 | if (!(sdev = to_scsi_device(dev))) |
| 2658 | return 0; |
| 2659 | |
| 2660 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) |
| 2661 | return 0; |
| 2662 | |
| 2663 | if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) |
| 2664 | lun = 0; |
| 2665 | else |
| 2666 | lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); |
| 2667 | |
| 2668 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, |
| 2669 | scsi_id->ud->id, lun); |
| 2670 | } |
| 2671 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 2672 | |
| 2673 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { |
| 2674 | &dev_attr_ieee1394_id, |
| 2675 | NULL |
| 2676 | }; |
| 2677 | |
| 2678 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); |
| 2679 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); |
| 2680 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); |
| 2681 | MODULE_LICENSE("GPL"); |
| 2682 | |
| 2683 | /* SCSI host template */ |
| 2684 | static struct scsi_host_template scsi_driver_template = { |
| 2685 | .module = THIS_MODULE, |
| 2686 | .name = "SBP-2 IEEE-1394", |
| 2687 | .proc_name = SBP2_DEVICE_NAME, |
| 2688 | .info = sbp2scsi_info, |
| 2689 | .queuecommand = sbp2scsi_queuecommand, |
| 2690 | .eh_abort_handler = sbp2scsi_abort, |
| 2691 | .eh_device_reset_handler = sbp2scsi_reset, |
| 2692 | .eh_bus_reset_handler = sbp2scsi_reset, |
| 2693 | .eh_host_reset_handler = sbp2scsi_reset, |
| 2694 | .slave_configure = sbp2scsi_slave_configure, |
| 2695 | .this_id = -1, |
| 2696 | .sg_tablesize = SG_ALL, |
| 2697 | .use_clustering = ENABLE_CLUSTERING, |
| 2698 | .cmd_per_lun = SBP2_MAX_CMDS, |
| 2699 | .can_queue = SBP2_MAX_CMDS, |
| 2700 | .emulated = 1, |
| 2701 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
| 2702 | }; |
| 2703 | |
| 2704 | static int sbp2_module_init(void) |
| 2705 | { |
| 2706 | int ret; |
| 2707 | |
| 2708 | SBP2_DEBUG("sbp2_module_init"); |
| 2709 | |
| 2710 | printk(KERN_INFO "sbp2: %s\n", version); |
| 2711 | |
| 2712 | /* Module load debug option to force one command at a time (serializing I/O) */ |
| 2713 | if (serialize_io) { |
| 2714 | SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)"); |
| 2715 | scsi_driver_template.can_queue = 1; |
| 2716 | scsi_driver_template.cmd_per_lun = 1; |
| 2717 | } |
| 2718 | |
| 2719 | /* Set max sectors (module load option). Default is 255 sectors. */ |
| 2720 | scsi_driver_template.max_sectors = max_sectors; |
| 2721 | |
| 2722 | |
| 2723 | /* Register our high level driver with 1394 stack */ |
| 2724 | hpsb_register_highlevel(&sbp2_highlevel); |
| 2725 | |
| 2726 | ret = hpsb_register_protocol(&sbp2_driver); |
| 2727 | if (ret) { |
| 2728 | SBP2_ERR("Failed to register protocol"); |
| 2729 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2730 | return ret; |
| 2731 | } |
| 2732 | |
| 2733 | return 0; |
| 2734 | } |
| 2735 | |
| 2736 | static void __exit sbp2_module_exit(void) |
| 2737 | { |
| 2738 | SBP2_DEBUG("sbp2_module_exit"); |
| 2739 | |
| 2740 | hpsb_unregister_protocol(&sbp2_driver); |
| 2741 | |
| 2742 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2743 | } |
| 2744 | |
| 2745 | module_init(sbp2_module_init); |
| 2746 | module_exit(sbp2_module_exit); |