2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
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.
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.
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.
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.
32 * You may access any attached SBP-2 (usually storage devices) as regular
33 * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
35 * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
36 * specification and for where to purchase the official standard.
39 * - look into possible improvements of the SCSI error handlers
40 * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
41 * - handle Logical_Unit_Number.ordered
42 * - handle src == 1 in status blocks
43 * - reimplement the DMA mapping in absence of physical DMA so that
44 * bus_to_virt is no longer required
45 * - debug the handling of absent physical DMA
46 * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
47 * (this is easy but depends on the previous two TODO items)
48 * - make the parameter serialize_io configurable per device
49 * - move all requests to fetch agent registers into non-atomic context,
50 * replace all usages of sbp2util_node_write_no_wait by true transactions
51 * Grep for inline FIXME comments below.
54 #include <linux/compiler.h>
55 #include <linux/delay.h>
56 #include <linux/device.h>
57 #include <linux/dma-mapping.h>
58 #include <linux/gfp.h>
59 #include <linux/init.h>
60 #include <linux/kernel.h>
61 #include <linux/list.h>
62 #include <linux/module.h>
63 #include <linux/moduleparam.h>
64 #include <linux/slab.h>
65 #include <linux/spinlock.h>
66 #include <linux/stat.h>
67 #include <linux/string.h>
68 #include <linux/stringify.h>
69 #include <linux/types.h>
70 #include <linux/wait.h>
72 #include <asm/byteorder.h>
73 #include <asm/errno.h>
74 #include <asm/param.h>
75 #include <asm/scatterlist.h>
76 #include <asm/system.h>
77 #include <asm/types.h>
79 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
80 #include <asm/io.h> /* for bus_to_virt */
83 #include <scsi/scsi.h>
84 #include <scsi/scsi_cmnd.h>
85 #include <scsi/scsi_dbg.h>
86 #include <scsi/scsi_device.h>
87 #include <scsi/scsi_host.h>
90 #include "highlevel.h"
93 #include "ieee1394_core.h"
94 #include "ieee1394_hotplug.h"
95 #include "ieee1394_transactions.h"
96 #include "ieee1394_types.h"
101 * Module load parameter definitions
105 * Change max_speed on module load if you have a bad IEEE-1394
106 * controller that has trouble running 2KB packets at 400mb.
108 * NOTE: On certain OHCI parts I have seen short packets on async transmit
109 * (probably due to PCI latency/throughput issues with the part). You can
110 * bump down the speed if you are running into problems.
112 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
113 module_param_named(max_speed, sbp2_max_speed, int, 0644);
114 MODULE_PARM_DESC(max_speed, "Force max speed "
115 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
118 * Set serialize_io to 1 if you'd like only one scsi command sent
119 * down to us at a time (debugging). This might be necessary for very
120 * badly behaved sbp2 devices.
122 static int sbp2_serialize_io = 1;
123 module_param_named(serialize_io, sbp2_serialize_io, int, 0444);
124 MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers "
125 "(default = 1, faster = 0)");
128 * Bump up max_sectors if you'd like to support very large sized
129 * transfers. Please note that some older sbp2 bridge chips are broken for
130 * transfers greater or equal to 128KB. Default is a value of 255
131 * sectors, or just under 128KB (at 512 byte sector size). I can note that
132 * the Oxsemi sbp2 chipsets have no problems supporting very large
135 static int sbp2_max_sectors = SBP2_MAX_SECTORS;
136 module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
137 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
138 "(default = " __stringify(SBP2_MAX_SECTORS) ")");
141 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
142 * do an exclusive login, as it's generally unsafe to have two hosts
143 * talking to a single sbp2 device at the same time (filesystem coherency,
144 * etc.). If you're running an sbp2 device that supports multiple logins,
145 * and you're either running read-only filesystems or some sort of special
146 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
147 * File System, or Lustre, then set exclusive_login to zero.
149 * So far only bridges from Oxford Semiconductor are known to support
150 * concurrent logins. Depending on firmware, four or two concurrent logins
151 * are possible on OXFW911 and newer Oxsemi bridges.
153 static int sbp2_exclusive_login = 1;
154 module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644);
155 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
159 * If any of the following workarounds is required for your device to work,
160 * please submit the kernel messages logged by sbp2 to the linux1394-devel
163 * - 128kB max transfer
164 * Limit transfer size. Necessary for some old bridges.
167 * When scsi_mod probes the device, let the inquiry command look like that
171 * Suppress sending of mode_sense for mode page 8 if the device pretends to
172 * support the SCSI Primary Block commands instead of Reduced Block Commands.
175 * Tell sd_mod to correct the last sector number reported by read_capacity.
176 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
177 * Don't use this with devices which don't have this bug.
179 * - override internal blacklist
180 * Instead of adding to the built-in blacklist, use only the workarounds
181 * specified in the module load parameter.
182 * Useful if a blacklist entry interfered with a non-broken device.
184 static int sbp2_default_workarounds;
185 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
186 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
187 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
188 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
189 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
190 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
191 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
192 ", or a combination)");
195 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
196 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
201 static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
202 static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
203 void (*)(struct scsi_cmnd *));
204 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
205 static int sbp2_start_device(struct sbp2_lu *);
206 static void sbp2_remove_device(struct sbp2_lu *);
207 static int sbp2_login_device(struct sbp2_lu *);
208 static int sbp2_reconnect_device(struct sbp2_lu *);
209 static int sbp2_logout_device(struct sbp2_lu *);
210 static void sbp2_host_reset(struct hpsb_host *);
211 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
213 static int sbp2_agent_reset(struct sbp2_lu *, int);
214 static void sbp2_parse_unit_directory(struct sbp2_lu *,
215 struct unit_directory *);
216 static int sbp2_set_busy_timeout(struct sbp2_lu *);
217 static int sbp2_max_speed_and_size(struct sbp2_lu *);
220 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
222 static struct hpsb_highlevel sbp2_highlevel = {
223 .name = SBP2_DEVICE_NAME,
224 .host_reset = sbp2_host_reset,
227 static struct hpsb_address_ops sbp2_ops = {
228 .write = sbp2_handle_status_write
231 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
232 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
234 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
237 static struct hpsb_address_ops sbp2_physdma_ops = {
238 .read = sbp2_handle_physdma_read,
239 .write = sbp2_handle_physdma_write,
245 * Interface to driver core and IEEE 1394 core
247 static struct ieee1394_device_id sbp2_id_table[] = {
249 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
250 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
251 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
254 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
256 static int sbp2_probe(struct device *);
257 static int sbp2_remove(struct device *);
258 static int sbp2_update(struct unit_directory *);
260 static struct hpsb_protocol_driver sbp2_driver = {
261 .name = SBP2_DEVICE_NAME,
262 .id_table = sbp2_id_table,
263 .update = sbp2_update,
266 .remove = sbp2_remove,
272 * Interface to SCSI core
274 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
275 void (*)(struct scsi_cmnd *));
276 static int sbp2scsi_abort(struct scsi_cmnd *);
277 static int sbp2scsi_reset(struct scsi_cmnd *);
278 static int sbp2scsi_slave_alloc(struct scsi_device *);
279 static int sbp2scsi_slave_configure(struct scsi_device *);
280 static void sbp2scsi_slave_destroy(struct scsi_device *);
281 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
282 struct device_attribute *, char *);
284 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
286 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
287 &dev_attr_ieee1394_id,
291 static struct scsi_host_template sbp2_shost_template = {
292 .module = THIS_MODULE,
293 .name = "SBP-2 IEEE-1394",
294 .proc_name = SBP2_DEVICE_NAME,
295 .queuecommand = sbp2scsi_queuecommand,
296 .eh_abort_handler = sbp2scsi_abort,
297 .eh_device_reset_handler = sbp2scsi_reset,
298 .slave_alloc = sbp2scsi_slave_alloc,
299 .slave_configure = sbp2scsi_slave_configure,
300 .slave_destroy = sbp2scsi_slave_destroy,
302 .sg_tablesize = SG_ALL,
303 .use_clustering = ENABLE_CLUSTERING,
304 .cmd_per_lun = SBP2_MAX_CMDS,
305 .can_queue = SBP2_MAX_CMDS,
306 .sdev_attrs = sbp2_sysfs_sdev_attrs,
309 /* for match-all entries in sbp2_workarounds_table */
310 #define SBP2_ROM_VALUE_WILDCARD 0x1000000
313 * List of devices with known bugs.
315 * The firmware_revision field, masked with 0xffff00, is the best indicator
316 * for the type of bridge chip of a device. It yields a few false positives
317 * but this did not break correctly behaving devices so far.
319 static const struct {
320 u32 firmware_revision;
322 unsigned workarounds;
323 } sbp2_workarounds_table[] = {
324 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
325 .firmware_revision = 0x002800,
326 .model_id = 0x001010,
327 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
328 SBP2_WORKAROUND_MODE_SENSE_8,
330 /* Initio bridges, actually only needed for some older ones */ {
331 .firmware_revision = 0x000200,
332 .model_id = SBP2_ROM_VALUE_WILDCARD,
333 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
335 /* Symbios bridge */ {
336 .firmware_revision = 0xa0b800,
337 .model_id = SBP2_ROM_VALUE_WILDCARD,
338 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
340 /* iPod 4th generation */ {
341 .firmware_revision = 0x0a2700,
342 .model_id = 0x000021,
343 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
346 .firmware_revision = 0x0a2700,
347 .model_id = 0x000023,
348 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
351 .firmware_revision = 0x0a2700,
352 .model_id = 0x00007e,
353 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
357 /**************************************
358 * General utility functions
359 **************************************/
363 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
365 static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
369 for (length = (length >> 2); length--; )
370 temp[length] = be32_to_cpu(temp[length]);
374 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
376 static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
380 for (length = (length >> 2); length--; )
381 temp[length] = cpu_to_be32(temp[length]);
383 #else /* BIG_ENDIAN */
384 /* Why waste the cpu cycles? */
385 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
386 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
389 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
392 * Waits for completion of an SBP-2 access request.
393 * Returns nonzero if timed out or prematurely interrupted.
395 static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
399 leftover = wait_event_interruptible_timeout(
400 sbp2_access_wq, lu->access_complete, timeout);
401 lu->access_complete = 0;
402 return leftover <= 0;
405 static void sbp2_free_packet(void *packet)
407 hpsb_free_tlabel(packet);
408 hpsb_free_packet(packet);
412 * This is much like hpsb_node_write(), except it ignores the response
413 * subaction and returns immediately. Can be used from atomic context.
415 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
416 quadlet_t *buf, size_t len)
418 struct hpsb_packet *packet;
420 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
424 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
425 hpsb_node_fill_packet(ne, packet);
426 if (hpsb_send_packet(packet) < 0) {
427 sbp2_free_packet(packet);
433 static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
434 quadlet_t *data, size_t len)
436 /* There is a small window after a bus reset within which the node
437 * entry's generation is current but the reconnect wasn't completed. */
438 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
441 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
443 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
445 /* Now accept new SCSI commands, unless a bus reset happended during
446 * hpsb_node_write. */
447 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
448 scsi_unblock_requests(lu->shost);
451 static void sbp2util_write_orb_pointer(struct work_struct *work)
453 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
456 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
457 data[1] = lu->last_orb_dma;
458 sbp2util_cpu_to_be32_buffer(data, 8);
459 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
462 static void sbp2util_write_doorbell(struct work_struct *work)
464 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
466 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
469 static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
471 struct sbp2_fwhost_info *hi = lu->hi;
472 struct sbp2_command_info *cmd;
473 int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
475 for (i = 0; i < orbs; i++) {
476 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
479 cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
481 sizeof(struct sbp2_command_orb),
483 cmd->sge_dma = dma_map_single(hi->host->device.parent,
484 &cmd->scatter_gather_element,
485 sizeof(cmd->scatter_gather_element),
487 INIT_LIST_HEAD(&cmd->list);
488 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
493 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
495 struct hpsb_host *host = lu->hi->host;
496 struct list_head *lh, *next;
497 struct sbp2_command_info *cmd;
500 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
501 if (!list_empty(&lu->cmd_orb_completed))
502 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
503 cmd = list_entry(lh, struct sbp2_command_info, list);
504 dma_unmap_single(host->device.parent,
505 cmd->command_orb_dma,
506 sizeof(struct sbp2_command_orb),
508 dma_unmap_single(host->device.parent, cmd->sge_dma,
509 sizeof(cmd->scatter_gather_element),
513 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
518 * Finds the sbp2_command for a given outstanding command ORB.
519 * Only looks at the in-use list.
521 static struct sbp2_command_info *sbp2util_find_command_for_orb(
522 struct sbp2_lu *lu, dma_addr_t orb)
524 struct sbp2_command_info *cmd;
527 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
528 if (!list_empty(&lu->cmd_orb_inuse))
529 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
530 if (cmd->command_orb_dma == orb) {
531 spin_unlock_irqrestore(
532 &lu->cmd_orb_lock, flags);
535 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
540 * Finds the sbp2_command for a given outstanding SCpnt.
541 * Only looks at the in-use list.
542 * Must be called with lu->cmd_orb_lock held.
544 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
545 struct sbp2_lu *lu, void *SCpnt)
547 struct sbp2_command_info *cmd;
549 if (!list_empty(&lu->cmd_orb_inuse))
550 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
551 if (cmd->Current_SCpnt == SCpnt)
556 static struct sbp2_command_info *sbp2util_allocate_command_orb(
558 struct scsi_cmnd *Current_SCpnt,
559 void (*Current_done)(struct scsi_cmnd *))
561 struct list_head *lh;
562 struct sbp2_command_info *cmd = NULL;
565 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
566 if (!list_empty(&lu->cmd_orb_completed)) {
567 lh = lu->cmd_orb_completed.next;
569 cmd = list_entry(lh, struct sbp2_command_info, list);
570 cmd->Current_done = Current_done;
571 cmd->Current_SCpnt = Current_SCpnt;
572 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
574 SBP2_ERR("%s: no orbs available", __FUNCTION__);
575 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
580 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
581 * Must be called with lu->cmd_orb_lock held.
583 static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
584 struct sbp2_command_info *cmd)
586 struct hpsb_host *host = lu->ud->ne->host;
589 if (cmd->dma_type == CMD_DMA_SINGLE)
590 dma_unmap_single(host->device.parent, cmd->cmd_dma,
591 cmd->dma_size, cmd->dma_dir);
592 else if (cmd->dma_type == CMD_DMA_PAGE)
593 dma_unmap_page(host->device.parent, cmd->cmd_dma,
594 cmd->dma_size, cmd->dma_dir);
595 /* XXX: Check for CMD_DMA_NONE bug */
596 cmd->dma_type = CMD_DMA_NONE;
599 if (cmd->sge_buffer) {
600 dma_unmap_sg(host->device.parent, cmd->sge_buffer,
601 cmd->dma_size, cmd->dma_dir);
602 cmd->sge_buffer = NULL;
604 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
608 * Is lu valid? Is the 1394 node still present?
610 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
612 return lu && lu->ne && !lu->ne->in_limbo;
615 /*********************************************
616 * IEEE-1394 core driver stack related section
617 *********************************************/
619 static int sbp2_probe(struct device *dev)
621 struct unit_directory *ud;
624 ud = container_of(dev, struct unit_directory, device);
626 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
628 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
631 lu = sbp2_alloc_device(ud);
635 sbp2_parse_unit_directory(lu, ud);
636 return sbp2_start_device(lu);
639 static int sbp2_remove(struct device *dev)
641 struct unit_directory *ud;
643 struct scsi_device *sdev;
645 ud = container_of(dev, struct unit_directory, device);
646 lu = ud->device.driver_data;
651 /* Get rid of enqueued commands if there is no chance to
653 if (!sbp2util_node_is_available(lu))
654 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
655 /* scsi_remove_device() may trigger shutdown functions of SCSI
656 * highlevel drivers which would deadlock if blocked. */
657 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
658 scsi_unblock_requests(lu->shost);
663 scsi_remove_device(sdev);
666 sbp2_logout_device(lu);
667 sbp2_remove_device(lu);
672 static int sbp2_update(struct unit_directory *ud)
674 struct sbp2_lu *lu = ud->device.driver_data;
676 if (sbp2_reconnect_device(lu)) {
677 /* Reconnect has failed. Perhaps we didn't reconnect fast
678 * enough. Try a regular login, but first log out just in
679 * case of any weirdness. */
680 sbp2_logout_device(lu);
682 if (sbp2_login_device(lu)) {
683 /* Login failed too, just fail, and the backend
684 * will call our sbp2_remove for us */
685 SBP2_ERR("Failed to reconnect to sbp2 device!");
690 sbp2_set_busy_timeout(lu);
691 sbp2_agent_reset(lu, 1);
692 sbp2_max_speed_and_size(lu);
694 /* Complete any pending commands with busy (so they get retried)
695 * and remove them from our queue. */
696 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
698 /* Accept new commands unless there was another bus reset in the
700 if (hpsb_node_entry_valid(lu->ne)) {
701 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
702 scsi_unblock_requests(lu->shost);
707 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
709 struct sbp2_fwhost_info *hi;
710 struct Scsi_Host *shost = NULL;
711 struct sbp2_lu *lu = NULL;
713 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
715 SBP2_ERR("failed to create lu");
721 lu->speed_code = IEEE1394_SPEED_100;
722 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
723 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
724 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
725 INIT_LIST_HEAD(&lu->cmd_orb_completed);
726 INIT_LIST_HEAD(&lu->lu_list);
727 spin_lock_init(&lu->cmd_orb_lock);
728 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
729 INIT_WORK(&lu->protocol_work, NULL);
731 ud->device.driver_data = lu;
733 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
735 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
738 SBP2_ERR("failed to allocate hostinfo");
741 hi->host = ud->ne->host;
742 INIT_LIST_HEAD(&hi->logical_units);
744 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
745 /* Handle data movement if physical dma is not
746 * enabled or not supported on host controller */
747 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
749 0x0ULL, 0xfffffffcULL)) {
750 SBP2_ERR("failed to register lower 4GB address range");
754 if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) {
755 SBP2_ERR("failed to set 4GB DMA mask");
761 /* Prevent unloading of the 1394 host */
762 if (!try_module_get(hi->host->driver->owner)) {
763 SBP2_ERR("failed to get a reference on 1394 host driver");
769 list_add_tail(&lu->lu_list, &hi->logical_units);
771 /* Register the status FIFO address range. We could use the same FIFO
772 * for targets at different nodes. However we need different FIFOs per
773 * target in order to support multi-unit devices.
774 * The FIFO is located out of the local host controller's physical range
775 * but, if possible, within the posted write area. Status writes will
776 * then be performed as unified transactions. This slightly reduces
777 * bandwidth usage, and some Prolific based devices seem to require it.
779 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
780 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
781 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
782 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
783 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
784 SBP2_ERR("failed to allocate status FIFO address range");
788 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
790 SBP2_ERR("failed to register scsi host");
794 shost->hostdata[0] = (unsigned long)lu;
796 if (!scsi_add_host(shost, &ud->device)) {
801 SBP2_ERR("failed to add scsi host");
802 scsi_host_put(shost);
805 sbp2_remove_device(lu);
809 static void sbp2_host_reset(struct hpsb_host *host)
811 struct sbp2_fwhost_info *hi;
814 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
817 list_for_each_entry(lu, &hi->logical_units, lu_list)
818 if (likely(atomic_read(&lu->state) !=
819 SBP2LU_STATE_IN_SHUTDOWN)) {
820 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
821 scsi_block_requests(lu->shost);
825 static int sbp2_start_device(struct sbp2_lu *lu)
827 struct sbp2_fwhost_info *hi = lu->hi;
830 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
831 sizeof(struct sbp2_login_response),
832 &lu->login_response_dma, GFP_KERNEL);
833 if (!lu->login_response)
836 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
837 sizeof(struct sbp2_query_logins_orb),
838 &lu->query_logins_orb_dma, GFP_KERNEL);
839 if (!lu->query_logins_orb)
842 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
843 sizeof(struct sbp2_query_logins_response),
844 &lu->query_logins_response_dma, GFP_KERNEL);
845 if (!lu->query_logins_response)
848 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
849 sizeof(struct sbp2_reconnect_orb),
850 &lu->reconnect_orb_dma, GFP_KERNEL);
851 if (!lu->reconnect_orb)
854 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
855 sizeof(struct sbp2_logout_orb),
856 &lu->logout_orb_dma, GFP_KERNEL);
860 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
861 sizeof(struct sbp2_login_orb),
862 &lu->login_orb_dma, GFP_KERNEL);
866 if (sbp2util_create_command_orb_pool(lu))
869 /* Wait a second before trying to log in. Previously logged in
870 * initiators need a chance to reconnect. */
871 if (msleep_interruptible(1000)) {
872 sbp2_remove_device(lu);
876 if (sbp2_login_device(lu)) {
877 sbp2_remove_device(lu);
881 sbp2_set_busy_timeout(lu);
882 sbp2_agent_reset(lu, 1);
883 sbp2_max_speed_and_size(lu);
885 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
887 SBP2_ERR("scsi_add_device failed");
888 sbp2_logout_device(lu);
889 sbp2_remove_device(lu);
896 SBP2_ERR("Could not allocate memory for lu");
897 sbp2_remove_device(lu);
901 static void sbp2_remove_device(struct sbp2_lu *lu)
903 struct sbp2_fwhost_info *hi;
911 scsi_remove_host(lu->shost);
912 scsi_host_put(lu->shost);
914 flush_scheduled_work();
915 sbp2util_remove_command_orb_pool(lu);
917 list_del(&lu->lu_list);
919 if (lu->login_response)
920 dma_free_coherent(hi->host->device.parent,
921 sizeof(struct sbp2_login_response),
923 lu->login_response_dma);
925 dma_free_coherent(hi->host->device.parent,
926 sizeof(struct sbp2_login_orb),
929 if (lu->reconnect_orb)
930 dma_free_coherent(hi->host->device.parent,
931 sizeof(struct sbp2_reconnect_orb),
933 lu->reconnect_orb_dma);
935 dma_free_coherent(hi->host->device.parent,
936 sizeof(struct sbp2_logout_orb),
939 if (lu->query_logins_orb)
940 dma_free_coherent(hi->host->device.parent,
941 sizeof(struct sbp2_query_logins_orb),
942 lu->query_logins_orb,
943 lu->query_logins_orb_dma);
944 if (lu->query_logins_response)
945 dma_free_coherent(hi->host->device.parent,
946 sizeof(struct sbp2_query_logins_response),
947 lu->query_logins_response,
948 lu->query_logins_response_dma);
950 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
951 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
952 lu->status_fifo_addr);
954 lu->ud->device.driver_data = NULL;
957 module_put(hi->host->driver->owner);
962 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
964 * Deal with write requests on adapters which do not support physical DMA or
965 * have it switched off.
967 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
968 int destid, quadlet_t *data, u64 addr,
969 size_t length, u16 flags)
971 memcpy(bus_to_virt((u32) addr), data, length);
972 return RCODE_COMPLETE;
976 * Deal with read requests on adapters which do not support physical DMA or
977 * have it switched off.
979 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
980 quadlet_t *data, u64 addr, size_t length,
983 memcpy(data, bus_to_virt((u32) addr), length);
984 return RCODE_COMPLETE;
988 /**************************************
989 * SBP-2 protocol related section
990 **************************************/
992 static int sbp2_query_logins(struct sbp2_lu *lu)
994 struct sbp2_fwhost_info *hi = lu->hi;
999 lu->query_logins_orb->reserved1 = 0x0;
1000 lu->query_logins_orb->reserved2 = 0x0;
1002 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1003 lu->query_logins_orb->query_response_hi =
1004 ORB_SET_NODE_ID(hi->host->node_id);
1005 lu->query_logins_orb->lun_misc =
1006 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1007 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1008 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1010 lu->query_logins_orb->reserved_resp_length =
1011 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1012 sizeof(struct sbp2_query_logins_response));
1014 lu->query_logins_orb->status_fifo_hi =
1015 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1016 lu->query_logins_orb->status_fifo_lo =
1017 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1019 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1020 sizeof(struct sbp2_query_logins_orb));
1022 memset(lu->query_logins_response, 0,
1023 sizeof(struct sbp2_query_logins_response));
1025 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1026 data[1] = lu->query_logins_orb_dma;
1027 sbp2util_cpu_to_be32_buffer(data, 8);
1029 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1031 if (sbp2util_access_timeout(lu, 2*HZ)) {
1032 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1036 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1037 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1041 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1042 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1046 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1047 sizeof(struct sbp2_query_logins_response));
1049 max_logins = RESPONSE_GET_MAX_LOGINS(
1050 lu->query_logins_response->length_max_logins);
1051 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1053 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1054 lu->query_logins_response->length_max_logins);
1055 SBP2_INFO("Number of active logins: %d", active_logins);
1057 if (active_logins >= max_logins) {
1064 static int sbp2_login_device(struct sbp2_lu *lu)
1066 struct sbp2_fwhost_info *hi = lu->hi;
1072 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1073 SBP2_INFO("Device does not support any more concurrent logins");
1077 /* assume no password */
1078 lu->login_orb->password_hi = 0;
1079 lu->login_orb->password_lo = 0;
1081 lu->login_orb->login_response_lo = lu->login_response_dma;
1082 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1083 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1085 /* one second reconnect time */
1086 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1087 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1088 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1089 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1091 lu->login_orb->passwd_resp_lengths =
1092 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1094 lu->login_orb->status_fifo_hi =
1095 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1096 lu->login_orb->status_fifo_lo =
1097 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1099 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1100 sizeof(struct sbp2_login_orb));
1102 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1104 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1105 data[1] = lu->login_orb_dma;
1106 sbp2util_cpu_to_be32_buffer(data, 8);
1108 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1110 /* wait up to 20 seconds for login status */
1111 if (sbp2util_access_timeout(lu, 20*HZ)) {
1112 SBP2_ERR("Error logging into SBP-2 device - timed out");
1116 /* make sure that the returned status matches the login ORB */
1117 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1118 SBP2_ERR("Error logging into SBP-2 device - timed out");
1122 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1123 SBP2_ERR("Error logging into SBP-2 device - failed");
1127 sbp2util_cpu_to_be32_buffer(lu->login_response,
1128 sizeof(struct sbp2_login_response));
1129 lu->command_block_agent_addr =
1130 ((u64)lu->login_response->command_block_agent_hi) << 32;
1131 lu->command_block_agent_addr |=
1132 ((u64)lu->login_response->command_block_agent_lo);
1133 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1135 SBP2_INFO("Logged into SBP-2 device");
1139 static int sbp2_logout_device(struct sbp2_lu *lu)
1141 struct sbp2_fwhost_info *hi = lu->hi;
1145 lu->logout_orb->reserved1 = 0x0;
1146 lu->logout_orb->reserved2 = 0x0;
1147 lu->logout_orb->reserved3 = 0x0;
1148 lu->logout_orb->reserved4 = 0x0;
1150 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1151 lu->logout_orb->login_ID_misc |=
1152 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1153 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1155 lu->logout_orb->reserved5 = 0x0;
1156 lu->logout_orb->status_fifo_hi =
1157 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1158 lu->logout_orb->status_fifo_lo =
1159 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1161 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1162 sizeof(struct sbp2_logout_orb));
1164 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1165 data[1] = lu->logout_orb_dma;
1166 sbp2util_cpu_to_be32_buffer(data, 8);
1168 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1172 /* wait up to 1 second for the device to complete logout */
1173 if (sbp2util_access_timeout(lu, HZ))
1176 SBP2_INFO("Logged out of SBP-2 device");
1180 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1182 struct sbp2_fwhost_info *hi = lu->hi;
1186 lu->reconnect_orb->reserved1 = 0x0;
1187 lu->reconnect_orb->reserved2 = 0x0;
1188 lu->reconnect_orb->reserved3 = 0x0;
1189 lu->reconnect_orb->reserved4 = 0x0;
1191 lu->reconnect_orb->login_ID_misc =
1192 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1193 lu->reconnect_orb->login_ID_misc |=
1194 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1195 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1197 lu->reconnect_orb->reserved5 = 0x0;
1198 lu->reconnect_orb->status_fifo_hi =
1199 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1200 lu->reconnect_orb->status_fifo_lo =
1201 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1203 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1204 sizeof(struct sbp2_reconnect_orb));
1206 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1207 data[1] = lu->reconnect_orb_dma;
1208 sbp2util_cpu_to_be32_buffer(data, 8);
1210 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1214 /* wait up to 1 second for reconnect status */
1215 if (sbp2util_access_timeout(lu, HZ)) {
1216 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1220 /* make sure that the returned status matches the reconnect ORB */
1221 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1222 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1226 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1227 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1231 SBP2_INFO("Reconnected to SBP-2 device");
1236 * Set the target node's Single Phase Retry limit. Affects the target's retry
1237 * behaviour if our node is too busy to accept requests.
1239 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1243 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1244 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1245 SBP2_ERR("%s error", __FUNCTION__);
1249 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1250 struct unit_directory *ud)
1252 struct csr1212_keyval *kv;
1253 struct csr1212_dentry *dentry;
1254 u64 management_agent_addr;
1255 u32 unit_characteristics, firmware_revision;
1256 unsigned workarounds;
1259 management_agent_addr = 0;
1260 unit_characteristics = 0;
1261 firmware_revision = 0;
1263 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1264 switch (kv->key.id) {
1265 case CSR1212_KV_ID_DEPENDENT_INFO:
1266 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1267 management_agent_addr =
1268 CSR1212_REGISTER_SPACE_BASE +
1269 (kv->value.csr_offset << 2);
1271 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1272 lu->lun = ORB_SET_LUN(kv->value.immediate);
1275 case SBP2_UNIT_CHARACTERISTICS_KEY:
1276 /* FIXME: This is ignored so far.
1277 * See SBP-2 clause 7.4.8. */
1278 unit_characteristics = kv->value.immediate;
1281 case SBP2_FIRMWARE_REVISION_KEY:
1282 firmware_revision = kv->value.immediate;
1286 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1287 * Its "ordered" bit has consequences for command ORB
1288 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1293 workarounds = sbp2_default_workarounds;
1295 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1296 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1297 if (sbp2_workarounds_table[i].firmware_revision !=
1298 SBP2_ROM_VALUE_WILDCARD &&
1299 sbp2_workarounds_table[i].firmware_revision !=
1300 (firmware_revision & 0xffff00))
1302 if (sbp2_workarounds_table[i].model_id !=
1303 SBP2_ROM_VALUE_WILDCARD &&
1304 sbp2_workarounds_table[i].model_id != ud->model_id)
1306 workarounds |= sbp2_workarounds_table[i].workarounds;
1311 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1312 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1313 " model_id 0x%06x)",
1314 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1315 workarounds, firmware_revision,
1316 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1319 /* We would need one SCSI host template for each target to adjust
1320 * max_sectors on the fly, therefore warn only. */
1321 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1322 (sbp2_max_sectors * 512) > (128 * 1024))
1323 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1324 "max transfer size. WARNING: Current max_sectors "
1325 "setting is larger than 128KB (%d sectors)",
1326 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1329 /* If this is a logical unit directory entry, process the parent
1330 * to get the values. */
1331 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1332 struct unit_directory *parent_ud = container_of(
1333 ud->device.parent, struct unit_directory, device);
1334 sbp2_parse_unit_directory(lu, parent_ud);
1336 lu->management_agent_addr = management_agent_addr;
1337 lu->workarounds = workarounds;
1338 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1339 lu->lun = ORB_SET_LUN(ud->lun);
1343 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1346 * This function is called in order to determine the max speed and packet
1347 * size we can use in our ORBs. Note, that we (the driver and host) only
1348 * initiate the transaction. The SBP-2 device actually transfers the data
1349 * (by reading from the DMA area we tell it). This means that the SBP-2
1350 * device decides the actual maximum data it can transfer. We just tell it
1351 * the speed that it needs to use, and the max_rec the host supports, and
1352 * it takes care of the rest.
1354 static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
1356 struct sbp2_fwhost_info *hi = lu->hi;
1359 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
1361 if (lu->speed_code > sbp2_max_speed) {
1362 lu->speed_code = sbp2_max_speed;
1363 SBP2_INFO("Reducing speed to %s",
1364 hpsb_speedto_str[sbp2_max_speed]);
1367 /* Payload size is the lesser of what our speed supports and what
1368 * our host supports. */
1369 payload = min(sbp2_speedto_max_payload[lu->speed_code],
1370 (u8) (hi->host->csr.max_rec - 1));
1372 /* If physical DMA is off, work around limitation in ohci1394:
1373 * packet size must not exceed PAGE_SIZE */
1374 if (lu->ne->host->low_addr_space < (1ULL << 32))
1375 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1379 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1380 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1381 hpsb_speedto_str[lu->speed_code],
1382 SBP2_PAYLOAD_TO_BYTES(payload));
1384 lu->max_payload_size = payload;
1388 static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
1393 unsigned long flags;
1395 /* flush lu->protocol_work */
1397 flush_scheduled_work();
1399 data = ntohl(SBP2_AGENT_RESET_DATA);
1400 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1403 retval = hpsb_node_write(lu->ne, addr, &data, 4);
1405 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
1408 SBP2_ERR("hpsb_node_write failed.\n");
1412 /* make sure that the ORB_POINTER is written on next command */
1413 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1414 lu->last_orb = NULL;
1415 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1420 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1421 struct sbp2_fwhost_info *hi,
1422 struct sbp2_command_info *cmd,
1423 unsigned int scsi_use_sg,
1424 struct scatterlist *sgpnt,
1426 enum dma_data_direction dma_dir)
1428 cmd->dma_dir = dma_dir;
1429 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1430 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1432 /* special case if only one element (and less than 64KB in size) */
1433 if ((scsi_use_sg == 1) &&
1434 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1436 cmd->dma_size = sgpnt[0].length;
1437 cmd->dma_type = CMD_DMA_PAGE;
1438 cmd->cmd_dma = dma_map_page(hi->host->device.parent,
1439 sgpnt[0].page, sgpnt[0].offset,
1440 cmd->dma_size, cmd->dma_dir);
1442 orb->data_descriptor_lo = cmd->cmd_dma;
1443 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
1446 struct sbp2_unrestricted_page_table *sg_element =
1447 &cmd->scatter_gather_element[0];
1448 u32 sg_count, sg_len;
1450 int i, count = dma_map_sg(hi->host->device.parent, sgpnt,
1451 scsi_use_sg, dma_dir);
1453 cmd->dma_size = scsi_use_sg;
1454 cmd->sge_buffer = sgpnt;
1456 /* use page tables (s/g) */
1457 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1458 orb->data_descriptor_lo = cmd->sge_dma;
1460 /* loop through and fill out our SBP-2 page tables
1461 * (and split up anything too large) */
1462 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1463 sg_len = sg_dma_len(sgpnt);
1464 sg_addr = sg_dma_address(sgpnt);
1466 sg_element[sg_count].segment_base_lo = sg_addr;
1467 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1468 sg_element[sg_count].length_segment_base_hi =
1469 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1470 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1471 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1473 sg_element[sg_count].length_segment_base_hi =
1474 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1481 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1483 sbp2util_cpu_to_be32_buffer(sg_element,
1484 (sizeof(struct sbp2_unrestricted_page_table)) *
1489 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1490 struct sbp2_fwhost_info *hi,
1491 struct sbp2_command_info *cmd,
1492 struct scatterlist *sgpnt,
1494 unsigned int scsi_request_bufflen,
1495 void *scsi_request_buffer,
1496 enum dma_data_direction dma_dir)
1498 cmd->dma_dir = dma_dir;
1499 cmd->dma_size = scsi_request_bufflen;
1500 cmd->dma_type = CMD_DMA_SINGLE;
1501 cmd->cmd_dma = dma_map_single(hi->host->device.parent,
1502 scsi_request_buffer,
1503 cmd->dma_size, cmd->dma_dir);
1504 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1505 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1507 /* handle case where we get a command w/o s/g enabled
1508 * (but check for transfers larger than 64K) */
1509 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1511 orb->data_descriptor_lo = cmd->cmd_dma;
1512 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1515 /* The buffer is too large. Turn this into page tables. */
1517 struct sbp2_unrestricted_page_table *sg_element =
1518 &cmd->scatter_gather_element[0];
1519 u32 sg_count, sg_len;
1522 orb->data_descriptor_lo = cmd->sge_dma;
1523 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1525 /* fill out our SBP-2 page tables; split up the large buffer */
1527 sg_len = scsi_request_bufflen;
1528 sg_addr = cmd->cmd_dma;
1530 sg_element[sg_count].segment_base_lo = sg_addr;
1531 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1532 sg_element[sg_count].length_segment_base_hi =
1533 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1534 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1535 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1537 sg_element[sg_count].length_segment_base_hi =
1538 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1544 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1546 sbp2util_cpu_to_be32_buffer(sg_element,
1547 (sizeof(struct sbp2_unrestricted_page_table)) *
1552 static void sbp2_create_command_orb(struct sbp2_lu *lu,
1553 struct sbp2_command_info *cmd,
1555 unsigned int scsi_use_sg,
1556 unsigned int scsi_request_bufflen,
1557 void *scsi_request_buffer,
1558 enum dma_data_direction dma_dir)
1560 struct sbp2_fwhost_info *hi = lu->hi;
1561 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1562 struct sbp2_command_orb *orb = &cmd->command_orb;
1566 * Set-up our command ORB.
1568 * NOTE: We're doing unrestricted page tables (s/g), as this is
1569 * best performance (at least with the devices I have). This means
1570 * that data_size becomes the number of s/g elements, and
1571 * page_size should be zero (for unrestricted).
1573 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1574 orb->next_ORB_lo = 0x0;
1575 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1576 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1577 orb->misc |= ORB_SET_NOTIFY(1);
1579 if (dma_dir == DMA_NONE)
1580 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1581 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1582 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1583 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1584 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1586 SBP2_INFO("Falling back to DMA_NONE");
1587 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1590 /* set up our page table stuff */
1591 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1592 orb->data_descriptor_hi = 0x0;
1593 orb->data_descriptor_lo = 0x0;
1594 orb->misc |= ORB_SET_DIRECTION(1);
1595 } else if (scsi_use_sg)
1596 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
1597 orb_direction, dma_dir);
1599 sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
1600 scsi_request_bufflen,
1601 scsi_request_buffer, dma_dir);
1603 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1605 memset(orb->cdb, 0, 12);
1606 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1609 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1610 struct sbp2_command_info *cmd)
1612 struct sbp2_fwhost_info *hi = lu->hi;
1613 struct sbp2_command_orb *last_orb;
1614 dma_addr_t last_orb_dma;
1615 u64 addr = lu->command_block_agent_addr;
1618 unsigned long flags;
1620 dma_sync_single_for_device(hi->host->device.parent,
1621 cmd->command_orb_dma,
1622 sizeof(struct sbp2_command_orb),
1624 dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
1625 sizeof(cmd->scatter_gather_element),
1628 /* check to see if there are any previous orbs to use */
1629 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1630 last_orb = lu->last_orb;
1631 last_orb_dma = lu->last_orb_dma;
1634 * last_orb == NULL means: We know that the target's fetch agent
1635 * is not active right now.
1637 addr += SBP2_ORB_POINTER_OFFSET;
1638 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1639 data[1] = cmd->command_orb_dma;
1640 sbp2util_cpu_to_be32_buffer(data, 8);
1644 * last_orb != NULL means: We know that the target's fetch agent
1645 * is (very probably) not dead or in reset state right now.
1646 * We have an ORB already sent that we can append a new one to.
1647 * The target's fetch agent may or may not have read this
1650 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
1651 sizeof(struct sbp2_command_orb),
1653 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1655 /* Tells hardware that this pointer is valid */
1656 last_orb->next_ORB_hi = 0;
1657 dma_sync_single_for_device(hi->host->device.parent,
1659 sizeof(struct sbp2_command_orb),
1661 addr += SBP2_DOORBELL_OFFSET;
1665 lu->last_orb = &cmd->command_orb;
1666 lu->last_orb_dma = cmd->command_orb_dma;
1667 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1669 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1671 * sbp2util_node_write_no_wait failed. We certainly ran out
1672 * of transaction labels, perhaps just because there were no
1673 * context switches which gave khpsbpkt a chance to collect
1674 * free tlabels. Try again in non-atomic context. If necessary,
1675 * the workqueue job will sleep to guaranteedly get a tlabel.
1676 * We do not accept new commands until the job is over.
1678 scsi_block_requests(lu->shost);
1679 PREPARE_WORK(&lu->protocol_work,
1680 last_orb ? sbp2util_write_doorbell:
1681 sbp2util_write_orb_pointer);
1682 schedule_work(&lu->protocol_work);
1686 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1687 void (*done)(struct scsi_cmnd *))
1689 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
1690 unsigned int request_bufflen = SCpnt->request_bufflen;
1691 struct sbp2_command_info *cmd;
1693 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1697 sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
1698 request_bufflen, SCpnt->request_buffer,
1699 SCpnt->sc_data_direction);
1700 sbp2_link_orb_command(lu, cmd);
1706 * Translates SBP-2 status into SCSI sense data for check conditions
1708 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1711 /* OK, it's pretty ugly... ;-) */
1712 sense_data[0] = 0x70;
1713 sense_data[1] = 0x0;
1714 sense_data[2] = sbp2_status[9];
1715 sense_data[3] = sbp2_status[12];
1716 sense_data[4] = sbp2_status[13];
1717 sense_data[5] = sbp2_status[14];
1718 sense_data[6] = sbp2_status[15];
1720 sense_data[8] = sbp2_status[16];
1721 sense_data[9] = sbp2_status[17];
1722 sense_data[10] = sbp2_status[18];
1723 sense_data[11] = sbp2_status[19];
1724 sense_data[12] = sbp2_status[10];
1725 sense_data[13] = sbp2_status[11];
1726 sense_data[14] = sbp2_status[20];
1727 sense_data[15] = sbp2_status[21];
1729 return sbp2_status[8] & 0x3f;
1732 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1733 int destid, quadlet_t *data, u64 addr,
1734 size_t length, u16 fl)
1736 struct sbp2_fwhost_info *hi;
1737 struct sbp2_lu *lu = NULL, *lu_tmp;
1738 struct scsi_cmnd *SCpnt = NULL;
1739 struct sbp2_status_block *sb;
1740 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1741 struct sbp2_command_info *cmd;
1742 unsigned long flags;
1744 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1745 SBP2_ERR("Wrong size of status block");
1746 return RCODE_ADDRESS_ERROR;
1748 if (unlikely(!host)) {
1749 SBP2_ERR("host is NULL - this is bad!");
1750 return RCODE_ADDRESS_ERROR;
1752 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1753 if (unlikely(!hi)) {
1754 SBP2_ERR("host info is NULL - this is bad!");
1755 return RCODE_ADDRESS_ERROR;
1758 /* Find the unit which wrote the status. */
1759 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1760 if (lu_tmp->ne->nodeid == nodeid &&
1761 lu_tmp->status_fifo_addr == addr) {
1766 if (unlikely(!lu)) {
1767 SBP2_ERR("lu is NULL - device is gone?");
1768 return RCODE_ADDRESS_ERROR;
1771 /* Put response into lu status fifo buffer. The first two bytes
1772 * come in big endian bit order. Often the target writes only a
1773 * truncated status block, minimally the first two quadlets. The rest
1774 * is implied to be zeros. */
1775 sb = &lu->status_block;
1776 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1777 memcpy(sb, data, length);
1778 sbp2util_be32_to_cpu_buffer(sb, 8);
1780 /* Ignore unsolicited status. Handle command ORB status. */
1781 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1784 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1786 dma_sync_single_for_cpu(hi->host->device.parent,
1787 cmd->command_orb_dma,
1788 sizeof(struct sbp2_command_orb),
1790 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1791 sizeof(cmd->scatter_gather_element),
1793 /* Grab SCSI command pointers and check status. */
1795 * FIXME: If the src field in the status is 1, the ORB DMA must
1796 * not be reused until status for a subsequent ORB is received.
1798 SCpnt = cmd->Current_SCpnt;
1799 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1800 sbp2util_mark_command_completed(lu, cmd);
1801 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1804 u32 h = sb->ORB_offset_hi_misc;
1805 u32 r = STATUS_GET_RESP(h);
1807 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1808 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1809 r, STATUS_GET_SBP_STATUS(h));
1811 r == RESP_STATUS_TRANSPORT_FAILURE ?
1812 SBP2_SCSI_STATUS_BUSY :
1813 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1816 if (STATUS_GET_LEN(h) > 1)
1817 scsi_status = sbp2_status_to_sense_data(
1818 (unchar *)sb, SCpnt->sense_buffer);
1820 if (STATUS_TEST_DEAD(h))
1821 sbp2_agent_reset(lu, 0);
1824 /* Check here to see if there are no commands in-use. If there
1825 * are none, we know that the fetch agent left the active state
1826 * _and_ that we did not reactivate it yet. Therefore clear
1827 * last_orb so that next time we write directly to the
1828 * ORB_POINTER register. That way the fetch agent does not need
1829 * to refetch the next_ORB. */
1830 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1831 if (list_empty(&lu->cmd_orb_inuse))
1832 lu->last_orb = NULL;
1833 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1836 /* It's probably status after a management request. */
1837 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1838 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1839 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1840 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1841 lu->access_complete = 1;
1842 wake_up_interruptible(&sbp2_access_wq);
1847 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1849 return RCODE_COMPLETE;
1852 /**************************************
1853 * SCSI interface related section
1854 **************************************/
1856 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1857 void (*done)(struct scsi_cmnd *))
1859 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1860 struct sbp2_fwhost_info *hi;
1861 int result = DID_NO_CONNECT << 16;
1863 if (unlikely(!sbp2util_node_is_available(lu)))
1868 if (unlikely(!hi)) {
1869 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1873 /* Multiple units are currently represented to the SCSI core as separate
1874 * targets, not as one target with multiple LUs. Therefore return
1875 * selection time-out to any IO directed at non-zero LUNs. */
1876 if (unlikely(SCpnt->device->lun))
1879 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1880 SBP2_ERR("Bus reset in progress - rejecting command");
1881 result = DID_BUS_BUSY << 16;
1885 /* Bidirectional commands are not yet implemented,
1886 * and unknown transfer direction not handled. */
1887 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1888 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1889 result = DID_ERROR << 16;
1893 if (sbp2_send_command(lu, SCpnt, done)) {
1894 SBP2_ERR("Error sending SCSI command");
1895 sbp2scsi_complete_command(lu,
1896 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1902 SCpnt->result = result;
1907 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1909 struct sbp2_fwhost_info *hi = lu->hi;
1910 struct list_head *lh;
1911 struct sbp2_command_info *cmd;
1912 unsigned long flags;
1914 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1915 while (!list_empty(&lu->cmd_orb_inuse)) {
1916 lh = lu->cmd_orb_inuse.next;
1917 cmd = list_entry(lh, struct sbp2_command_info, list);
1918 dma_sync_single_for_cpu(hi->host->device.parent,
1919 cmd->command_orb_dma,
1920 sizeof(struct sbp2_command_orb),
1922 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1923 sizeof(cmd->scatter_gather_element),
1925 sbp2util_mark_command_completed(lu, cmd);
1926 if (cmd->Current_SCpnt) {
1927 cmd->Current_SCpnt->result = status << 16;
1928 cmd->Current_done(cmd->Current_SCpnt);
1931 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1937 * Complete a regular SCSI command. Can be called in atomic context.
1939 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1940 struct scsi_cmnd *SCpnt,
1941 void (*done)(struct scsi_cmnd *))
1944 SBP2_ERR("SCpnt is NULL");
1948 switch (scsi_status) {
1949 case SBP2_SCSI_STATUS_GOOD:
1950 SCpnt->result = DID_OK << 16;
1953 case SBP2_SCSI_STATUS_BUSY:
1954 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1955 SCpnt->result = DID_BUS_BUSY << 16;
1958 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1959 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1962 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1963 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1964 SCpnt->result = DID_NO_CONNECT << 16;
1965 scsi_print_command(SCpnt);
1968 case SBP2_SCSI_STATUS_CONDITION_MET:
1969 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1970 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1971 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1972 SCpnt->result = DID_ERROR << 16;
1973 scsi_print_command(SCpnt);
1977 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1978 SCpnt->result = DID_ERROR << 16;
1981 /* If a bus reset is in progress and there was an error, complete
1982 * the command as busy so that it will get retried. */
1983 if (!hpsb_node_entry_valid(lu->ne)
1984 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1985 SBP2_ERR("Completing command with busy (bus reset)");
1986 SCpnt->result = DID_BUS_BUSY << 16;
1989 /* Tell the SCSI stack that we're done with this command. */
1993 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1995 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
1998 sdev->allow_restart = 1;
2000 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2001 sdev->inquiry_len = 36;
2005 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2007 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2009 sdev->use_10_for_rw = 1;
2011 if (sdev->type == TYPE_ROM)
2012 sdev->use_10_for_ms = 1;
2013 if (sdev->type == TYPE_DISK &&
2014 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2015 sdev->skip_ms_page_8 = 1;
2016 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2017 sdev->fix_capacity = 1;
2021 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2023 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2028 * Called by scsi stack when something has really gone wrong.
2029 * Usually called when a command has timed-out for some reason.
2031 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2033 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2034 struct sbp2_fwhost_info *hi = lu->hi;
2035 struct sbp2_command_info *cmd;
2036 unsigned long flags;
2038 SBP2_INFO("aborting sbp2 command");
2039 scsi_print_command(SCpnt);
2041 if (sbp2util_node_is_available(lu)) {
2042 sbp2_agent_reset(lu, 1);
2044 /* Return a matching command structure to the free pool. */
2045 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2046 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2048 dma_sync_single_for_cpu(hi->host->device.parent,
2049 cmd->command_orb_dma,
2050 sizeof(struct sbp2_command_orb),
2052 dma_sync_single_for_cpu(hi->host->device.parent,
2054 sizeof(cmd->scatter_gather_element),
2056 sbp2util_mark_command_completed(lu, cmd);
2057 if (cmd->Current_SCpnt) {
2058 cmd->Current_SCpnt->result = DID_ABORT << 16;
2059 cmd->Current_done(cmd->Current_SCpnt);
2062 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2064 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2071 * Called by scsi stack when something has really gone wrong.
2073 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2075 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2077 SBP2_INFO("reset requested");
2079 if (sbp2util_node_is_available(lu)) {
2080 SBP2_INFO("generating sbp2 fetch agent reset");
2081 sbp2_agent_reset(lu, 1);
2087 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2088 struct device_attribute *attr,
2091 struct scsi_device *sdev;
2094 if (!(sdev = to_scsi_device(dev)))
2097 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2100 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
2101 lu->ud->id, ORB_SET_LUN(lu->lun));
2104 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2105 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2106 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2107 MODULE_LICENSE("GPL");
2109 static int sbp2_module_init(void)
2113 if (sbp2_serialize_io) {
2114 sbp2_shost_template.can_queue = 1;
2115 sbp2_shost_template.cmd_per_lun = 1;
2118 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2119 (sbp2_max_sectors * 512) > (128 * 1024))
2120 sbp2_max_sectors = 128 * 1024 / 512;
2121 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2123 hpsb_register_highlevel(&sbp2_highlevel);
2124 ret = hpsb_register_protocol(&sbp2_driver);
2126 SBP2_ERR("Failed to register protocol");
2127 hpsb_unregister_highlevel(&sbp2_highlevel);
2133 static void __exit sbp2_module_exit(void)
2135 hpsb_unregister_protocol(&sbp2_driver);
2136 hpsb_unregister_highlevel(&sbp2_highlevel);
2139 module_init(sbp2_module_init);
2140 module_exit(sbp2_module_exit);