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/blkdev.h>
55 #include <linux/compiler.h>
56 #include <linux/delay.h>
57 #include <linux/device.h>
58 #include <linux/dma-mapping.h>
59 #include <linux/gfp.h>
60 #include <linux/init.h>
61 #include <linux/kernel.h>
62 #include <linux/list.h>
63 #include <linux/module.h>
64 #include <linux/moduleparam.h>
65 #include <linux/slab.h>
66 #include <linux/spinlock.h>
67 #include <linux/stat.h>
68 #include <linux/string.h>
69 #include <linux/stringify.h>
70 #include <linux/types.h>
71 #include <linux/wait.h>
73 #include <asm/byteorder.h>
74 #include <asm/errno.h>
75 #include <asm/param.h>
76 #include <asm/scatterlist.h>
77 #include <asm/system.h>
78 #include <asm/types.h>
80 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
81 #include <asm/io.h> /* for bus_to_virt */
84 #include <scsi/scsi.h>
85 #include <scsi/scsi_cmnd.h>
86 #include <scsi/scsi_dbg.h>
87 #include <scsi/scsi_device.h>
88 #include <scsi/scsi_host.h>
91 #include "highlevel.h"
94 #include "ieee1394_core.h"
95 #include "ieee1394_hotplug.h"
96 #include "ieee1394_transactions.h"
97 #include "ieee1394_types.h"
102 * Module load parameter definitions
106 * Change max_speed on module load if you have a bad IEEE-1394
107 * controller that has trouble running 2KB packets at 400mb.
109 * NOTE: On certain OHCI parts I have seen short packets on async transmit
110 * (probably due to PCI latency/throughput issues with the part). You can
111 * bump down the speed if you are running into problems.
113 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
114 module_param_named(max_speed, sbp2_max_speed, int, 0644);
115 MODULE_PARM_DESC(max_speed, "Force max speed "
116 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
119 * Set serialize_io to 1 if you'd like only one scsi command sent
120 * down to us at a time (debugging). This might be necessary for very
121 * badly behaved sbp2 devices.
123 static int sbp2_serialize_io = 1;
124 module_param_named(serialize_io, sbp2_serialize_io, int, 0444);
125 MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers "
126 "(default = 1, faster = 0)");
129 * Bump up max_sectors if you'd like to support very large sized
130 * transfers. Please note that some older sbp2 bridge chips are broken for
131 * transfers greater or equal to 128KB. Default is a value of 255
132 * sectors, or just under 128KB (at 512 byte sector size). I can note that
133 * the Oxsemi sbp2 chipsets have no problems supporting very large
136 static int sbp2_max_sectors = SBP2_MAX_SECTORS;
137 module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
138 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
139 "(default = " __stringify(SBP2_MAX_SECTORS) ")");
142 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
143 * do an exclusive login, as it's generally unsafe to have two hosts
144 * talking to a single sbp2 device at the same time (filesystem coherency,
145 * etc.). If you're running an sbp2 device that supports multiple logins,
146 * and you're either running read-only filesystems or some sort of special
147 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
148 * File System, or Lustre, then set exclusive_login to zero.
150 * So far only bridges from Oxford Semiconductor are known to support
151 * concurrent logins. Depending on firmware, four or two concurrent logins
152 * are possible on OXFW911 and newer Oxsemi bridges.
154 static int sbp2_exclusive_login = 1;
155 module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644);
156 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
160 * If any of the following workarounds is required for your device to work,
161 * please submit the kernel messages logged by sbp2 to the linux1394-devel
164 * - 128kB max transfer
165 * Limit transfer size. Necessary for some old bridges.
168 * When scsi_mod probes the device, let the inquiry command look like that
172 * Suppress sending of mode_sense for mode page 8 if the device pretends to
173 * support the SCSI Primary Block commands instead of Reduced Block Commands.
176 * Tell sd_mod to correct the last sector number reported by read_capacity.
177 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
178 * Don't use this with devices which don't have this bug.
180 * - override internal blacklist
181 * Instead of adding to the built-in blacklist, use only the workarounds
182 * specified in the module load parameter.
183 * Useful if a blacklist entry interfered with a non-broken device.
185 static int sbp2_default_workarounds;
186 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
187 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
188 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
189 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
190 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
191 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
192 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
193 ", or a combination)");
196 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
197 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
202 static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
203 static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
204 void (*)(struct scsi_cmnd *));
205 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
206 static int sbp2_start_device(struct sbp2_lu *);
207 static void sbp2_remove_device(struct sbp2_lu *);
208 static int sbp2_login_device(struct sbp2_lu *);
209 static int sbp2_reconnect_device(struct sbp2_lu *);
210 static int sbp2_logout_device(struct sbp2_lu *);
211 static void sbp2_host_reset(struct hpsb_host *);
212 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
214 static int sbp2_agent_reset(struct sbp2_lu *, int);
215 static void sbp2_parse_unit_directory(struct sbp2_lu *,
216 struct unit_directory *);
217 static int sbp2_set_busy_timeout(struct sbp2_lu *);
218 static int sbp2_max_speed_and_size(struct sbp2_lu *);
221 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
223 static struct hpsb_highlevel sbp2_highlevel = {
224 .name = SBP2_DEVICE_NAME,
225 .host_reset = sbp2_host_reset,
228 static struct hpsb_address_ops sbp2_ops = {
229 .write = sbp2_handle_status_write
232 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
233 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
235 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
238 static struct hpsb_address_ops sbp2_physdma_ops = {
239 .read = sbp2_handle_physdma_read,
240 .write = sbp2_handle_physdma_write,
246 * Interface to driver core and IEEE 1394 core
248 static struct ieee1394_device_id sbp2_id_table[] = {
250 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
251 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
252 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
255 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
257 static int sbp2_probe(struct device *);
258 static int sbp2_remove(struct device *);
259 static int sbp2_update(struct unit_directory *);
261 static struct hpsb_protocol_driver sbp2_driver = {
262 .name = SBP2_DEVICE_NAME,
263 .id_table = sbp2_id_table,
264 .update = sbp2_update,
267 .remove = sbp2_remove,
273 * Interface to SCSI core
275 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
276 void (*)(struct scsi_cmnd *));
277 static int sbp2scsi_abort(struct scsi_cmnd *);
278 static int sbp2scsi_reset(struct scsi_cmnd *);
279 static int sbp2scsi_slave_alloc(struct scsi_device *);
280 static int sbp2scsi_slave_configure(struct scsi_device *);
281 static void sbp2scsi_slave_destroy(struct scsi_device *);
282 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
283 struct device_attribute *, char *);
285 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
287 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
288 &dev_attr_ieee1394_id,
292 static struct scsi_host_template sbp2_shost_template = {
293 .module = THIS_MODULE,
294 .name = "SBP-2 IEEE-1394",
295 .proc_name = SBP2_DEVICE_NAME,
296 .queuecommand = sbp2scsi_queuecommand,
297 .eh_abort_handler = sbp2scsi_abort,
298 .eh_device_reset_handler = sbp2scsi_reset,
299 .slave_alloc = sbp2scsi_slave_alloc,
300 .slave_configure = sbp2scsi_slave_configure,
301 .slave_destroy = sbp2scsi_slave_destroy,
303 .sg_tablesize = SG_ALL,
304 .use_clustering = ENABLE_CLUSTERING,
305 .cmd_per_lun = SBP2_MAX_CMDS,
306 .can_queue = SBP2_MAX_CMDS,
308 .sdev_attrs = sbp2_sysfs_sdev_attrs,
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 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
334 /* Symbios bridge */ {
335 .firmware_revision = 0xa0b800,
336 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
339 * Note about the following Apple iPod blacklist entries:
341 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
342 * matching logic treats 0 as a wildcard, we cannot match this ID
343 * without rewriting the matching routine. Fortunately these iPods
344 * do not feature the read_capacity bug according to one report.
345 * Read_capacity behaviour as well as model_id could change due to
346 * Apple-supplied firmware updates though.
348 /* iPod 4th generation */ {
349 .firmware_revision = 0x0a2700,
350 .model_id = 0x000021,
351 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
354 .firmware_revision = 0x0a2700,
355 .model_id = 0x000023,
356 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
359 .firmware_revision = 0x0a2700,
360 .model_id = 0x00007e,
361 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
365 /**************************************
366 * General utility functions
367 **************************************/
371 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
373 static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
377 for (length = (length >> 2); length--; )
378 temp[length] = be32_to_cpu(temp[length]);
382 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
384 static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
388 for (length = (length >> 2); length--; )
389 temp[length] = cpu_to_be32(temp[length]);
391 #else /* BIG_ENDIAN */
392 /* Why waste the cpu cycles? */
393 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
394 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
397 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
400 * Waits for completion of an SBP-2 access request.
401 * Returns nonzero if timed out or prematurely interrupted.
403 static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
407 leftover = wait_event_interruptible_timeout(
408 sbp2_access_wq, lu->access_complete, timeout);
409 lu->access_complete = 0;
410 return leftover <= 0;
413 static void sbp2_free_packet(void *packet)
415 hpsb_free_tlabel(packet);
416 hpsb_free_packet(packet);
420 * This is much like hpsb_node_write(), except it ignores the response
421 * subaction and returns immediately. Can be used from atomic context.
423 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
424 quadlet_t *buf, size_t len)
426 struct hpsb_packet *packet;
428 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
432 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
433 hpsb_node_fill_packet(ne, packet);
434 if (hpsb_send_packet(packet) < 0) {
435 sbp2_free_packet(packet);
441 static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
442 quadlet_t *data, size_t len)
444 /* There is a small window after a bus reset within which the node
445 * entry's generation is current but the reconnect wasn't completed. */
446 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
449 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
451 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
453 /* Now accept new SCSI commands, unless a bus reset happended during
454 * hpsb_node_write. */
455 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
456 scsi_unblock_requests(lu->shost);
459 static void sbp2util_write_orb_pointer(struct work_struct *work)
461 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
464 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
465 data[1] = lu->last_orb_dma;
466 sbp2util_cpu_to_be32_buffer(data, 8);
467 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
470 static void sbp2util_write_doorbell(struct work_struct *work)
472 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
474 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
477 static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
479 struct sbp2_fwhost_info *hi = lu->hi;
481 unsigned long flags, orbs;
482 struct sbp2_command_info *cmd;
484 orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
486 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
487 for (i = 0; i < orbs; i++) {
488 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
490 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
493 cmd->command_orb_dma = dma_map_single(&hi->host->device,
495 sizeof(struct sbp2_command_orb),
497 cmd->sge_dma = dma_map_single(&hi->host->device,
498 &cmd->scatter_gather_element,
499 sizeof(cmd->scatter_gather_element),
501 INIT_LIST_HEAD(&cmd->list);
502 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
504 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
508 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
510 struct hpsb_host *host = lu->hi->host;
511 struct list_head *lh, *next;
512 struct sbp2_command_info *cmd;
515 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
516 if (!list_empty(&lu->cmd_orb_completed))
517 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
518 cmd = list_entry(lh, struct sbp2_command_info, list);
519 dma_unmap_single(&host->device, cmd->command_orb_dma,
520 sizeof(struct sbp2_command_orb),
522 dma_unmap_single(&host->device, cmd->sge_dma,
523 sizeof(cmd->scatter_gather_element),
527 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
532 * Finds the sbp2_command for a given outstanding command ORB.
533 * Only looks at the in-use list.
535 static struct sbp2_command_info *sbp2util_find_command_for_orb(
536 struct sbp2_lu *lu, dma_addr_t orb)
538 struct sbp2_command_info *cmd;
541 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
542 if (!list_empty(&lu->cmd_orb_inuse))
543 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
544 if (cmd->command_orb_dma == orb) {
545 spin_unlock_irqrestore(
546 &lu->cmd_orb_lock, flags);
549 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
554 * Finds the sbp2_command for a given outstanding SCpnt.
555 * Only looks at the in-use list.
556 * Must be called with lu->cmd_orb_lock held.
558 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
559 struct sbp2_lu *lu, void *SCpnt)
561 struct sbp2_command_info *cmd;
563 if (!list_empty(&lu->cmd_orb_inuse))
564 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
565 if (cmd->Current_SCpnt == SCpnt)
570 static struct sbp2_command_info *sbp2util_allocate_command_orb(
572 struct scsi_cmnd *Current_SCpnt,
573 void (*Current_done)(struct scsi_cmnd *))
575 struct list_head *lh;
576 struct sbp2_command_info *cmd = NULL;
579 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
580 if (!list_empty(&lu->cmd_orb_completed)) {
581 lh = lu->cmd_orb_completed.next;
583 cmd = list_entry(lh, struct sbp2_command_info, list);
584 cmd->Current_done = Current_done;
585 cmd->Current_SCpnt = Current_SCpnt;
586 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
588 SBP2_ERR("%s: no orbs available", __FUNCTION__);
589 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
594 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
595 * Must be called with lu->cmd_orb_lock held.
597 static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
598 struct sbp2_command_info *cmd)
600 struct hpsb_host *host = lu->ud->ne->host;
603 if (cmd->dma_type == CMD_DMA_SINGLE)
604 dma_unmap_single(&host->device, cmd->cmd_dma,
605 cmd->dma_size, cmd->dma_dir);
606 else if (cmd->dma_type == CMD_DMA_PAGE)
607 dma_unmap_page(&host->device, cmd->cmd_dma,
608 cmd->dma_size, cmd->dma_dir);
609 /* XXX: Check for CMD_DMA_NONE bug */
610 cmd->dma_type = CMD_DMA_NONE;
613 if (cmd->sge_buffer) {
614 dma_unmap_sg(&host->device, cmd->sge_buffer,
615 cmd->dma_size, cmd->dma_dir);
616 cmd->sge_buffer = NULL;
618 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
622 * Is lu valid? Is the 1394 node still present?
624 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
626 return lu && lu->ne && !lu->ne->in_limbo;
629 /*********************************************
630 * IEEE-1394 core driver stack related section
631 *********************************************/
633 static int sbp2_probe(struct device *dev)
635 struct unit_directory *ud;
638 ud = container_of(dev, struct unit_directory, device);
640 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
642 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
645 lu = sbp2_alloc_device(ud);
649 sbp2_parse_unit_directory(lu, ud);
650 return sbp2_start_device(lu);
653 static int sbp2_remove(struct device *dev)
655 struct unit_directory *ud;
657 struct scsi_device *sdev;
659 ud = container_of(dev, struct unit_directory, device);
660 lu = ud->device.driver_data;
665 /* Get rid of enqueued commands if there is no chance to
667 if (!sbp2util_node_is_available(lu))
668 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
669 /* scsi_remove_device() may trigger shutdown functions of SCSI
670 * highlevel drivers which would deadlock if blocked. */
671 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
672 scsi_unblock_requests(lu->shost);
677 scsi_remove_device(sdev);
680 sbp2_logout_device(lu);
681 sbp2_remove_device(lu);
686 static int sbp2_update(struct unit_directory *ud)
688 struct sbp2_lu *lu = ud->device.driver_data;
690 if (sbp2_reconnect_device(lu)) {
691 /* Reconnect has failed. Perhaps we didn't reconnect fast
692 * enough. Try a regular login, but first log out just in
693 * case of any weirdness. */
694 sbp2_logout_device(lu);
696 if (sbp2_login_device(lu)) {
697 /* Login failed too, just fail, and the backend
698 * will call our sbp2_remove for us */
699 SBP2_ERR("Failed to reconnect to sbp2 device!");
704 sbp2_set_busy_timeout(lu);
705 sbp2_agent_reset(lu, 1);
706 sbp2_max_speed_and_size(lu);
708 /* Complete any pending commands with busy (so they get retried)
709 * and remove them from our queue. */
710 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
712 /* Accept new commands unless there was another bus reset in the
714 if (hpsb_node_entry_valid(lu->ne)) {
715 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
716 scsi_unblock_requests(lu->shost);
721 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
723 struct sbp2_fwhost_info *hi;
724 struct Scsi_Host *shost = NULL;
725 struct sbp2_lu *lu = NULL;
727 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
729 SBP2_ERR("failed to create lu");
735 lu->speed_code = IEEE1394_SPEED_100;
736 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
737 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
738 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
739 INIT_LIST_HEAD(&lu->cmd_orb_completed);
740 INIT_LIST_HEAD(&lu->lu_list);
741 spin_lock_init(&lu->cmd_orb_lock);
742 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
743 INIT_WORK(&lu->protocol_work, NULL);
745 ud->device.driver_data = lu;
747 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
749 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
752 SBP2_ERR("failed to allocate hostinfo");
755 hi->host = ud->ne->host;
756 INIT_LIST_HEAD(&hi->logical_units);
758 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
759 /* Handle data movement if physical dma is not
760 * enabled or not supported on host controller */
761 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
763 0x0ULL, 0xfffffffcULL)) {
764 SBP2_ERR("failed to register lower 4GB address range");
770 /* Prevent unloading of the 1394 host */
771 if (!try_module_get(hi->host->driver->owner)) {
772 SBP2_ERR("failed to get a reference on 1394 host driver");
778 list_add_tail(&lu->lu_list, &hi->logical_units);
780 /* Register the status FIFO address range. We could use the same FIFO
781 * for targets at different nodes. However we need different FIFOs per
782 * target in order to support multi-unit devices.
783 * The FIFO is located out of the local host controller's physical range
784 * but, if possible, within the posted write area. Status writes will
785 * then be performed as unified transactions. This slightly reduces
786 * bandwidth usage, and some Prolific based devices seem to require it.
788 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
789 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
790 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
791 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
792 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
793 SBP2_ERR("failed to allocate status FIFO address range");
797 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
799 SBP2_ERR("failed to register scsi host");
803 shost->hostdata[0] = (unsigned long)lu;
805 if (!scsi_add_host(shost, &ud->device)) {
810 SBP2_ERR("failed to add scsi host");
811 scsi_host_put(shost);
814 sbp2_remove_device(lu);
818 static void sbp2_host_reset(struct hpsb_host *host)
820 struct sbp2_fwhost_info *hi;
823 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
826 list_for_each_entry(lu, &hi->logical_units, lu_list)
827 if (likely(atomic_read(&lu->state) !=
828 SBP2LU_STATE_IN_SHUTDOWN)) {
829 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
830 scsi_block_requests(lu->shost);
834 static int sbp2_start_device(struct sbp2_lu *lu)
836 struct sbp2_fwhost_info *hi = lu->hi;
839 lu->login_response = dma_alloc_coherent(&hi->host->device,
840 sizeof(struct sbp2_login_response),
841 &lu->login_response_dma, GFP_KERNEL);
842 if (!lu->login_response)
845 lu->query_logins_orb = dma_alloc_coherent(&hi->host->device,
846 sizeof(struct sbp2_query_logins_orb),
847 &lu->query_logins_orb_dma, GFP_KERNEL);
848 if (!lu->query_logins_orb)
851 lu->query_logins_response = dma_alloc_coherent(&hi->host->device,
852 sizeof(struct sbp2_query_logins_response),
853 &lu->query_logins_response_dma, GFP_KERNEL);
854 if (!lu->query_logins_response)
857 lu->reconnect_orb = dma_alloc_coherent(&hi->host->device,
858 sizeof(struct sbp2_reconnect_orb),
859 &lu->reconnect_orb_dma, GFP_KERNEL);
860 if (!lu->reconnect_orb)
863 lu->logout_orb = dma_alloc_coherent(&hi->host->device,
864 sizeof(struct sbp2_logout_orb),
865 &lu->logout_orb_dma, GFP_KERNEL);
869 lu->login_orb = dma_alloc_coherent(&hi->host->device,
870 sizeof(struct sbp2_login_orb),
871 &lu->login_orb_dma, GFP_KERNEL);
875 if (sbp2util_create_command_orb_pool(lu)) {
876 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
877 sbp2_remove_device(lu);
881 /* Wait a second before trying to log in. Previously logged in
882 * initiators need a chance to reconnect. */
883 if (msleep_interruptible(1000)) {
884 sbp2_remove_device(lu);
888 if (sbp2_login_device(lu)) {
889 sbp2_remove_device(lu);
893 sbp2_set_busy_timeout(lu);
894 sbp2_agent_reset(lu, 1);
895 sbp2_max_speed_and_size(lu);
897 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
899 SBP2_ERR("scsi_add_device failed");
900 sbp2_logout_device(lu);
901 sbp2_remove_device(lu);
908 SBP2_ERR("Could not allocate memory for lu");
909 sbp2_remove_device(lu);
913 static void sbp2_remove_device(struct sbp2_lu *lu)
915 struct sbp2_fwhost_info *hi;
923 scsi_remove_host(lu->shost);
924 scsi_host_put(lu->shost);
926 flush_scheduled_work();
927 sbp2util_remove_command_orb_pool(lu);
929 list_del(&lu->lu_list);
931 if (lu->login_response)
932 dma_free_coherent(&hi->host->device,
933 sizeof(struct sbp2_login_response),
935 lu->login_response_dma);
937 dma_free_coherent(&hi->host->device,
938 sizeof(struct sbp2_login_orb),
941 if (lu->reconnect_orb)
942 dma_free_coherent(&hi->host->device,
943 sizeof(struct sbp2_reconnect_orb),
945 lu->reconnect_orb_dma);
947 dma_free_coherent(&hi->host->device,
948 sizeof(struct sbp2_logout_orb),
951 if (lu->query_logins_orb)
952 dma_free_coherent(&hi->host->device,
953 sizeof(struct sbp2_query_logins_orb),
954 lu->query_logins_orb,
955 lu->query_logins_orb_dma);
956 if (lu->query_logins_response)
957 dma_free_coherent(&hi->host->device,
958 sizeof(struct sbp2_query_logins_response),
959 lu->query_logins_response,
960 lu->query_logins_response_dma);
962 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
963 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
964 lu->status_fifo_addr);
966 lu->ud->device.driver_data = NULL;
969 module_put(hi->host->driver->owner);
974 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
976 * Deal with write requests on adapters which do not support physical DMA or
977 * have it switched off.
979 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
980 int destid, quadlet_t *data, u64 addr,
981 size_t length, u16 flags)
983 memcpy(bus_to_virt((u32) addr), data, length);
984 return RCODE_COMPLETE;
988 * Deal with read requests on adapters which do not support physical DMA or
989 * have it switched off.
991 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
992 quadlet_t *data, u64 addr, size_t length,
995 memcpy(data, bus_to_virt((u32) addr), length);
996 return RCODE_COMPLETE;
1000 /**************************************
1001 * SBP-2 protocol related section
1002 **************************************/
1004 static int sbp2_query_logins(struct sbp2_lu *lu)
1006 struct sbp2_fwhost_info *hi = lu->hi;
1011 lu->query_logins_orb->reserved1 = 0x0;
1012 lu->query_logins_orb->reserved2 = 0x0;
1014 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1015 lu->query_logins_orb->query_response_hi =
1016 ORB_SET_NODE_ID(hi->host->node_id);
1017 lu->query_logins_orb->lun_misc =
1018 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1019 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1020 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1022 lu->query_logins_orb->reserved_resp_length =
1023 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1024 sizeof(struct sbp2_query_logins_response));
1026 lu->query_logins_orb->status_fifo_hi =
1027 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1028 lu->query_logins_orb->status_fifo_lo =
1029 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1031 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1032 sizeof(struct sbp2_query_logins_orb));
1034 memset(lu->query_logins_response, 0,
1035 sizeof(struct sbp2_query_logins_response));
1037 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1038 data[1] = lu->query_logins_orb_dma;
1039 sbp2util_cpu_to_be32_buffer(data, 8);
1041 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1043 if (sbp2util_access_timeout(lu, 2*HZ)) {
1044 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1048 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1049 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1053 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1054 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1058 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1059 sizeof(struct sbp2_query_logins_response));
1061 max_logins = RESPONSE_GET_MAX_LOGINS(
1062 lu->query_logins_response->length_max_logins);
1063 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1065 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1066 lu->query_logins_response->length_max_logins);
1067 SBP2_INFO("Number of active logins: %d", active_logins);
1069 if (active_logins >= max_logins) {
1076 static int sbp2_login_device(struct sbp2_lu *lu)
1078 struct sbp2_fwhost_info *hi = lu->hi;
1084 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1085 SBP2_INFO("Device does not support any more concurrent logins");
1089 /* assume no password */
1090 lu->login_orb->password_hi = 0;
1091 lu->login_orb->password_lo = 0;
1093 lu->login_orb->login_response_lo = lu->login_response_dma;
1094 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1095 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1097 /* one second reconnect time */
1098 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1099 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1100 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1101 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1103 lu->login_orb->passwd_resp_lengths =
1104 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1106 lu->login_orb->status_fifo_hi =
1107 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1108 lu->login_orb->status_fifo_lo =
1109 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1111 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1112 sizeof(struct sbp2_login_orb));
1114 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1116 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1117 data[1] = lu->login_orb_dma;
1118 sbp2util_cpu_to_be32_buffer(data, 8);
1120 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1122 /* wait up to 20 seconds for login status */
1123 if (sbp2util_access_timeout(lu, 20*HZ)) {
1124 SBP2_ERR("Error logging into SBP-2 device - timed out");
1128 /* make sure that the returned status matches the login ORB */
1129 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1130 SBP2_ERR("Error logging into SBP-2 device - timed out");
1134 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1135 SBP2_ERR("Error logging into SBP-2 device - failed");
1139 sbp2util_cpu_to_be32_buffer(lu->login_response,
1140 sizeof(struct sbp2_login_response));
1141 lu->command_block_agent_addr =
1142 ((u64)lu->login_response->command_block_agent_hi) << 32;
1143 lu->command_block_agent_addr |=
1144 ((u64)lu->login_response->command_block_agent_lo);
1145 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1147 SBP2_INFO("Logged into SBP-2 device");
1151 static int sbp2_logout_device(struct sbp2_lu *lu)
1153 struct sbp2_fwhost_info *hi = lu->hi;
1157 lu->logout_orb->reserved1 = 0x0;
1158 lu->logout_orb->reserved2 = 0x0;
1159 lu->logout_orb->reserved3 = 0x0;
1160 lu->logout_orb->reserved4 = 0x0;
1162 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1163 lu->logout_orb->login_ID_misc |=
1164 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1165 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1167 lu->logout_orb->reserved5 = 0x0;
1168 lu->logout_orb->status_fifo_hi =
1169 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1170 lu->logout_orb->status_fifo_lo =
1171 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1173 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1174 sizeof(struct sbp2_logout_orb));
1176 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1177 data[1] = lu->logout_orb_dma;
1178 sbp2util_cpu_to_be32_buffer(data, 8);
1180 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1184 /* wait up to 1 second for the device to complete logout */
1185 if (sbp2util_access_timeout(lu, HZ))
1188 SBP2_INFO("Logged out of SBP-2 device");
1192 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1194 struct sbp2_fwhost_info *hi = lu->hi;
1198 lu->reconnect_orb->reserved1 = 0x0;
1199 lu->reconnect_orb->reserved2 = 0x0;
1200 lu->reconnect_orb->reserved3 = 0x0;
1201 lu->reconnect_orb->reserved4 = 0x0;
1203 lu->reconnect_orb->login_ID_misc =
1204 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1205 lu->reconnect_orb->login_ID_misc |=
1206 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1207 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1209 lu->reconnect_orb->reserved5 = 0x0;
1210 lu->reconnect_orb->status_fifo_hi =
1211 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1212 lu->reconnect_orb->status_fifo_lo =
1213 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1215 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1216 sizeof(struct sbp2_reconnect_orb));
1218 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1219 data[1] = lu->reconnect_orb_dma;
1220 sbp2util_cpu_to_be32_buffer(data, 8);
1222 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1226 /* wait up to 1 second for reconnect status */
1227 if (sbp2util_access_timeout(lu, HZ)) {
1228 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1232 /* make sure that the returned status matches the reconnect ORB */
1233 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1234 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1238 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1239 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1243 SBP2_INFO("Reconnected to SBP-2 device");
1248 * Set the target node's Single Phase Retry limit. Affects the target's retry
1249 * behaviour if our node is too busy to accept requests.
1251 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1255 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1256 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1257 SBP2_ERR("%s error", __FUNCTION__);
1261 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1262 struct unit_directory *ud)
1264 struct csr1212_keyval *kv;
1265 struct csr1212_dentry *dentry;
1266 u64 management_agent_addr;
1267 u32 unit_characteristics, firmware_revision;
1268 unsigned workarounds;
1271 management_agent_addr = 0;
1272 unit_characteristics = 0;
1273 firmware_revision = 0;
1275 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1276 switch (kv->key.id) {
1277 case CSR1212_KV_ID_DEPENDENT_INFO:
1278 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1279 management_agent_addr =
1280 CSR1212_REGISTER_SPACE_BASE +
1281 (kv->value.csr_offset << 2);
1283 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1284 lu->lun = ORB_SET_LUN(kv->value.immediate);
1287 case SBP2_UNIT_CHARACTERISTICS_KEY:
1288 /* FIXME: This is ignored so far.
1289 * See SBP-2 clause 7.4.8. */
1290 unit_characteristics = kv->value.immediate;
1293 case SBP2_FIRMWARE_REVISION_KEY:
1294 firmware_revision = kv->value.immediate;
1298 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1299 * Its "ordered" bit has consequences for command ORB
1300 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1305 workarounds = sbp2_default_workarounds;
1307 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1308 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1309 if (sbp2_workarounds_table[i].firmware_revision &&
1310 sbp2_workarounds_table[i].firmware_revision !=
1311 (firmware_revision & 0xffff00))
1313 if (sbp2_workarounds_table[i].model_id &&
1314 sbp2_workarounds_table[i].model_id != ud->model_id)
1316 workarounds |= sbp2_workarounds_table[i].workarounds;
1321 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1322 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1323 " model_id 0x%06x)",
1324 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1325 workarounds, firmware_revision,
1326 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1329 /* We would need one SCSI host template for each target to adjust
1330 * max_sectors on the fly, therefore warn only. */
1331 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1332 (sbp2_max_sectors * 512) > (128 * 1024))
1333 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1334 "max transfer size. WARNING: Current max_sectors "
1335 "setting is larger than 128KB (%d sectors)",
1336 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1339 /* If this is a logical unit directory entry, process the parent
1340 * to get the values. */
1341 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1342 struct unit_directory *parent_ud = container_of(
1343 ud->device.parent, struct unit_directory, device);
1344 sbp2_parse_unit_directory(lu, parent_ud);
1346 lu->management_agent_addr = management_agent_addr;
1347 lu->workarounds = workarounds;
1348 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1349 lu->lun = ORB_SET_LUN(ud->lun);
1353 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1356 * This function is called in order to determine the max speed and packet
1357 * size we can use in our ORBs. Note, that we (the driver and host) only
1358 * initiate the transaction. The SBP-2 device actually transfers the data
1359 * (by reading from the DMA area we tell it). This means that the SBP-2
1360 * device decides the actual maximum data it can transfer. We just tell it
1361 * the speed that it needs to use, and the max_rec the host supports, and
1362 * it takes care of the rest.
1364 static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
1366 struct sbp2_fwhost_info *hi = lu->hi;
1369 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
1371 if (lu->speed_code > sbp2_max_speed) {
1372 lu->speed_code = sbp2_max_speed;
1373 SBP2_INFO("Reducing speed to %s",
1374 hpsb_speedto_str[sbp2_max_speed]);
1377 /* Payload size is the lesser of what our speed supports and what
1378 * our host supports. */
1379 payload = min(sbp2_speedto_max_payload[lu->speed_code],
1380 (u8) (hi->host->csr.max_rec - 1));
1382 /* If physical DMA is off, work around limitation in ohci1394:
1383 * packet size must not exceed PAGE_SIZE */
1384 if (lu->ne->host->low_addr_space < (1ULL << 32))
1385 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1389 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1390 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1391 hpsb_speedto_str[lu->speed_code],
1392 SBP2_PAYLOAD_TO_BYTES(payload));
1394 lu->max_payload_size = payload;
1398 static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
1403 unsigned long flags;
1405 /* flush lu->protocol_work */
1407 flush_scheduled_work();
1409 data = ntohl(SBP2_AGENT_RESET_DATA);
1410 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1413 retval = hpsb_node_write(lu->ne, addr, &data, 4);
1415 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
1418 SBP2_ERR("hpsb_node_write failed.\n");
1422 /* make sure that the ORB_POINTER is written on next command */
1423 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1424 lu->last_orb = NULL;
1425 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1430 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1431 struct sbp2_fwhost_info *hi,
1432 struct sbp2_command_info *cmd,
1433 unsigned int scsi_use_sg,
1434 struct scatterlist *sgpnt,
1436 enum dma_data_direction dma_dir)
1438 cmd->dma_dir = dma_dir;
1439 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1440 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1442 /* special case if only one element (and less than 64KB in size) */
1443 if ((scsi_use_sg == 1) &&
1444 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1446 cmd->dma_size = sgpnt[0].length;
1447 cmd->dma_type = CMD_DMA_PAGE;
1448 cmd->cmd_dma = dma_map_page(&hi->host->device,
1449 sgpnt[0].page, sgpnt[0].offset,
1450 cmd->dma_size, cmd->dma_dir);
1452 orb->data_descriptor_lo = cmd->cmd_dma;
1453 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
1456 struct sbp2_unrestricted_page_table *sg_element =
1457 &cmd->scatter_gather_element[0];
1458 u32 sg_count, sg_len;
1460 int i, count = dma_map_sg(&hi->host->device, sgpnt, scsi_use_sg,
1463 cmd->dma_size = scsi_use_sg;
1464 cmd->sge_buffer = sgpnt;
1466 /* use page tables (s/g) */
1467 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1468 orb->data_descriptor_lo = cmd->sge_dma;
1470 /* loop through and fill out our SBP-2 page tables
1471 * (and split up anything too large) */
1472 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1473 sg_len = sg_dma_len(sgpnt);
1474 sg_addr = sg_dma_address(sgpnt);
1476 sg_element[sg_count].segment_base_lo = sg_addr;
1477 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1478 sg_element[sg_count].length_segment_base_hi =
1479 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1480 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1481 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1483 sg_element[sg_count].length_segment_base_hi =
1484 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1491 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1493 sbp2util_cpu_to_be32_buffer(sg_element,
1494 (sizeof(struct sbp2_unrestricted_page_table)) *
1499 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1500 struct sbp2_fwhost_info *hi,
1501 struct sbp2_command_info *cmd,
1502 struct scatterlist *sgpnt,
1504 unsigned int scsi_request_bufflen,
1505 void *scsi_request_buffer,
1506 enum dma_data_direction dma_dir)
1508 cmd->dma_dir = dma_dir;
1509 cmd->dma_size = scsi_request_bufflen;
1510 cmd->dma_type = CMD_DMA_SINGLE;
1511 cmd->cmd_dma = dma_map_single(&hi->host->device, scsi_request_buffer,
1512 cmd->dma_size, cmd->dma_dir);
1513 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1514 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1516 /* handle case where we get a command w/o s/g enabled
1517 * (but check for transfers larger than 64K) */
1518 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1520 orb->data_descriptor_lo = cmd->cmd_dma;
1521 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1524 /* The buffer is too large. Turn this into page tables. */
1526 struct sbp2_unrestricted_page_table *sg_element =
1527 &cmd->scatter_gather_element[0];
1528 u32 sg_count, sg_len;
1531 orb->data_descriptor_lo = cmd->sge_dma;
1532 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1534 /* fill out our SBP-2 page tables; split up the large buffer */
1536 sg_len = scsi_request_bufflen;
1537 sg_addr = cmd->cmd_dma;
1539 sg_element[sg_count].segment_base_lo = sg_addr;
1540 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1541 sg_element[sg_count].length_segment_base_hi =
1542 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1543 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1544 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1546 sg_element[sg_count].length_segment_base_hi =
1547 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1553 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1555 sbp2util_cpu_to_be32_buffer(sg_element,
1556 (sizeof(struct sbp2_unrestricted_page_table)) *
1561 static void sbp2_create_command_orb(struct sbp2_lu *lu,
1562 struct sbp2_command_info *cmd,
1564 unsigned int scsi_use_sg,
1565 unsigned int scsi_request_bufflen,
1566 void *scsi_request_buffer,
1567 enum dma_data_direction dma_dir)
1569 struct sbp2_fwhost_info *hi = lu->hi;
1570 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1571 struct sbp2_command_orb *orb = &cmd->command_orb;
1575 * Set-up our command ORB.
1577 * NOTE: We're doing unrestricted page tables (s/g), as this is
1578 * best performance (at least with the devices I have). This means
1579 * that data_size becomes the number of s/g elements, and
1580 * page_size should be zero (for unrestricted).
1582 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1583 orb->next_ORB_lo = 0x0;
1584 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1585 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1586 orb->misc |= ORB_SET_NOTIFY(1);
1588 if (dma_dir == DMA_NONE)
1589 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1590 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1591 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1592 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1593 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1595 SBP2_INFO("Falling back to DMA_NONE");
1596 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1599 /* set up our page table stuff */
1600 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1601 orb->data_descriptor_hi = 0x0;
1602 orb->data_descriptor_lo = 0x0;
1603 orb->misc |= ORB_SET_DIRECTION(1);
1604 } else if (scsi_use_sg)
1605 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
1606 orb_direction, dma_dir);
1608 sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
1609 scsi_request_bufflen,
1610 scsi_request_buffer, dma_dir);
1612 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1614 memset(orb->cdb, 0, 12);
1615 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1618 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1619 struct sbp2_command_info *cmd)
1621 struct sbp2_fwhost_info *hi = lu->hi;
1622 struct sbp2_command_orb *last_orb;
1623 dma_addr_t last_orb_dma;
1624 u64 addr = lu->command_block_agent_addr;
1627 unsigned long flags;
1629 dma_sync_single_for_device(&hi->host->device, cmd->command_orb_dma,
1630 sizeof(struct sbp2_command_orb),
1632 dma_sync_single_for_device(&hi->host->device, cmd->sge_dma,
1633 sizeof(cmd->scatter_gather_element),
1636 /* check to see if there are any previous orbs to use */
1637 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1638 last_orb = lu->last_orb;
1639 last_orb_dma = lu->last_orb_dma;
1642 * last_orb == NULL means: We know that the target's fetch agent
1643 * is not active right now.
1645 addr += SBP2_ORB_POINTER_OFFSET;
1646 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1647 data[1] = cmd->command_orb_dma;
1648 sbp2util_cpu_to_be32_buffer(data, 8);
1652 * last_orb != NULL means: We know that the target's fetch agent
1653 * is (very probably) not dead or in reset state right now.
1654 * We have an ORB already sent that we can append a new one to.
1655 * The target's fetch agent may or may not have read this
1658 dma_sync_single_for_cpu(&hi->host->device, last_orb_dma,
1659 sizeof(struct sbp2_command_orb),
1661 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1663 /* Tells hardware that this pointer is valid */
1664 last_orb->next_ORB_hi = 0;
1665 dma_sync_single_for_device(&hi->host->device, last_orb_dma,
1666 sizeof(struct sbp2_command_orb),
1668 addr += SBP2_DOORBELL_OFFSET;
1672 lu->last_orb = &cmd->command_orb;
1673 lu->last_orb_dma = cmd->command_orb_dma;
1674 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1676 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1678 * sbp2util_node_write_no_wait failed. We certainly ran out
1679 * of transaction labels, perhaps just because there were no
1680 * context switches which gave khpsbpkt a chance to collect
1681 * free tlabels. Try again in non-atomic context. If necessary,
1682 * the workqueue job will sleep to guaranteedly get a tlabel.
1683 * We do not accept new commands until the job is over.
1685 scsi_block_requests(lu->shost);
1686 PREPARE_WORK(&lu->protocol_work,
1687 last_orb ? sbp2util_write_doorbell:
1688 sbp2util_write_orb_pointer);
1689 schedule_work(&lu->protocol_work);
1693 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1694 void (*done)(struct scsi_cmnd *))
1696 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
1697 unsigned int request_bufflen = SCpnt->request_bufflen;
1698 struct sbp2_command_info *cmd;
1700 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1704 sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
1705 request_bufflen, SCpnt->request_buffer,
1706 SCpnt->sc_data_direction);
1707 sbp2_link_orb_command(lu, cmd);
1713 * Translates SBP-2 status into SCSI sense data for check conditions
1715 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1718 /* OK, it's pretty ugly... ;-) */
1719 sense_data[0] = 0x70;
1720 sense_data[1] = 0x0;
1721 sense_data[2] = sbp2_status[9];
1722 sense_data[3] = sbp2_status[12];
1723 sense_data[4] = sbp2_status[13];
1724 sense_data[5] = sbp2_status[14];
1725 sense_data[6] = sbp2_status[15];
1727 sense_data[8] = sbp2_status[16];
1728 sense_data[9] = sbp2_status[17];
1729 sense_data[10] = sbp2_status[18];
1730 sense_data[11] = sbp2_status[19];
1731 sense_data[12] = sbp2_status[10];
1732 sense_data[13] = sbp2_status[11];
1733 sense_data[14] = sbp2_status[20];
1734 sense_data[15] = sbp2_status[21];
1736 return sbp2_status[8] & 0x3f;
1739 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1740 int destid, quadlet_t *data, u64 addr,
1741 size_t length, u16 fl)
1743 struct sbp2_fwhost_info *hi;
1744 struct sbp2_lu *lu = NULL, *lu_tmp;
1745 struct scsi_cmnd *SCpnt = NULL;
1746 struct sbp2_status_block *sb;
1747 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1748 struct sbp2_command_info *cmd;
1749 unsigned long flags;
1751 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1752 SBP2_ERR("Wrong size of status block");
1753 return RCODE_ADDRESS_ERROR;
1755 if (unlikely(!host)) {
1756 SBP2_ERR("host is NULL - this is bad!");
1757 return RCODE_ADDRESS_ERROR;
1759 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1760 if (unlikely(!hi)) {
1761 SBP2_ERR("host info is NULL - this is bad!");
1762 return RCODE_ADDRESS_ERROR;
1765 /* Find the unit which wrote the status. */
1766 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1767 if (lu_tmp->ne->nodeid == nodeid &&
1768 lu_tmp->status_fifo_addr == addr) {
1773 if (unlikely(!lu)) {
1774 SBP2_ERR("lu is NULL - device is gone?");
1775 return RCODE_ADDRESS_ERROR;
1778 /* Put response into lu status fifo buffer. The first two bytes
1779 * come in big endian bit order. Often the target writes only a
1780 * truncated status block, minimally the first two quadlets. The rest
1781 * is implied to be zeros. */
1782 sb = &lu->status_block;
1783 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1784 memcpy(sb, data, length);
1785 sbp2util_be32_to_cpu_buffer(sb, 8);
1787 /* Ignore unsolicited status. Handle command ORB status. */
1788 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1791 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1793 dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
1794 sizeof(struct sbp2_command_orb),
1796 dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
1797 sizeof(cmd->scatter_gather_element),
1799 /* Grab SCSI command pointers and check status. */
1801 * FIXME: If the src field in the status is 1, the ORB DMA must
1802 * not be reused until status for a subsequent ORB is received.
1804 SCpnt = cmd->Current_SCpnt;
1805 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1806 sbp2util_mark_command_completed(lu, cmd);
1807 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1810 u32 h = sb->ORB_offset_hi_misc;
1811 u32 r = STATUS_GET_RESP(h);
1813 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1814 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1815 r, STATUS_GET_SBP_STATUS(h));
1817 r == RESP_STATUS_TRANSPORT_FAILURE ?
1818 SBP2_SCSI_STATUS_BUSY :
1819 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1822 if (STATUS_GET_LEN(h) > 1)
1823 scsi_status = sbp2_status_to_sense_data(
1824 (unchar *)sb, SCpnt->sense_buffer);
1826 if (STATUS_TEST_DEAD(h))
1827 sbp2_agent_reset(lu, 0);
1830 /* Check here to see if there are no commands in-use. If there
1831 * are none, we know that the fetch agent left the active state
1832 * _and_ that we did not reactivate it yet. Therefore clear
1833 * last_orb so that next time we write directly to the
1834 * ORB_POINTER register. That way the fetch agent does not need
1835 * to refetch the next_ORB. */
1836 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1837 if (list_empty(&lu->cmd_orb_inuse))
1838 lu->last_orb = NULL;
1839 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1842 /* It's probably status after a management request. */
1843 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1844 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1845 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1846 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1847 lu->access_complete = 1;
1848 wake_up_interruptible(&sbp2_access_wq);
1853 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1855 return RCODE_COMPLETE;
1858 /**************************************
1859 * SCSI interface related section
1860 **************************************/
1862 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1863 void (*done)(struct scsi_cmnd *))
1865 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1866 struct sbp2_fwhost_info *hi;
1867 int result = DID_NO_CONNECT << 16;
1869 if (unlikely(!sbp2util_node_is_available(lu)))
1874 if (unlikely(!hi)) {
1875 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1879 /* Multiple units are currently represented to the SCSI core as separate
1880 * targets, not as one target with multiple LUs. Therefore return
1881 * selection time-out to any IO directed at non-zero LUNs. */
1882 if (unlikely(SCpnt->device->lun))
1885 /* handle the request sense command here (auto-request sense) */
1886 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
1887 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer,
1888 SCpnt->request_bufflen);
1889 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
1890 sbp2scsi_complete_command(lu, SBP2_SCSI_STATUS_GOOD, SCpnt,
1895 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1896 SBP2_ERR("Bus reset in progress - rejecting command");
1897 result = DID_BUS_BUSY << 16;
1901 /* Bidirectional commands are not yet implemented,
1902 * and unknown transfer direction not handled. */
1903 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1904 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1905 result = DID_ERROR << 16;
1909 if (sbp2_send_command(lu, SCpnt, done)) {
1910 SBP2_ERR("Error sending SCSI command");
1911 sbp2scsi_complete_command(lu,
1912 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1918 SCpnt->result = result;
1923 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1925 struct sbp2_fwhost_info *hi = lu->hi;
1926 struct list_head *lh;
1927 struct sbp2_command_info *cmd;
1928 unsigned long flags;
1930 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1931 while (!list_empty(&lu->cmd_orb_inuse)) {
1932 lh = lu->cmd_orb_inuse.next;
1933 cmd = list_entry(lh, struct sbp2_command_info, list);
1934 dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
1935 sizeof(struct sbp2_command_orb),
1937 dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
1938 sizeof(cmd->scatter_gather_element),
1940 sbp2util_mark_command_completed(lu, cmd);
1941 if (cmd->Current_SCpnt) {
1942 cmd->Current_SCpnt->result = status << 16;
1943 cmd->Current_done(cmd->Current_SCpnt);
1946 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1952 * Complete a regular SCSI command. Can be called in atomic context.
1954 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1955 struct scsi_cmnd *SCpnt,
1956 void (*done)(struct scsi_cmnd *))
1959 SBP2_ERR("SCpnt is NULL");
1963 switch (scsi_status) {
1964 case SBP2_SCSI_STATUS_GOOD:
1965 SCpnt->result = DID_OK << 16;
1968 case SBP2_SCSI_STATUS_BUSY:
1969 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1970 SCpnt->result = DID_BUS_BUSY << 16;
1973 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1974 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1977 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1978 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1979 SCpnt->result = DID_NO_CONNECT << 16;
1980 scsi_print_command(SCpnt);
1983 case SBP2_SCSI_STATUS_CONDITION_MET:
1984 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1985 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1986 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1987 SCpnt->result = DID_ERROR << 16;
1988 scsi_print_command(SCpnt);
1992 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1993 SCpnt->result = DID_ERROR << 16;
1996 /* If a bus reset is in progress and there was an error, complete
1997 * the command as busy so that it will get retried. */
1998 if (!hpsb_node_entry_valid(lu->ne)
1999 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2000 SBP2_ERR("Completing command with busy (bus reset)");
2001 SCpnt->result = DID_BUS_BUSY << 16;
2004 /* Tell the SCSI stack that we're done with this command. */
2008 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2010 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2013 sdev->allow_restart = 1;
2015 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2016 sdev->inquiry_len = 36;
2020 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2022 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2024 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2025 sdev->use_10_for_rw = 1;
2027 if (sdev->type == TYPE_DISK &&
2028 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2029 sdev->skip_ms_page_8 = 1;
2030 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2031 sdev->fix_capacity = 1;
2035 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2037 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2042 * Called by scsi stack when something has really gone wrong.
2043 * Usually called when a command has timed-out for some reason.
2045 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2047 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2048 struct sbp2_fwhost_info *hi = lu->hi;
2049 struct sbp2_command_info *cmd;
2050 unsigned long flags;
2052 SBP2_INFO("aborting sbp2 command");
2053 scsi_print_command(SCpnt);
2055 if (sbp2util_node_is_available(lu)) {
2056 sbp2_agent_reset(lu, 1);
2058 /* Return a matching command structure to the free pool. */
2059 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2060 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2062 dma_sync_single_for_cpu(&hi->host->device,
2063 cmd->command_orb_dma,
2064 sizeof(struct sbp2_command_orb),
2066 dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
2067 sizeof(cmd->scatter_gather_element),
2069 sbp2util_mark_command_completed(lu, cmd);
2070 if (cmd->Current_SCpnt) {
2071 cmd->Current_SCpnt->result = DID_ABORT << 16;
2072 cmd->Current_done(cmd->Current_SCpnt);
2075 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2077 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2084 * Called by scsi stack when something has really gone wrong.
2086 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2088 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2090 SBP2_INFO("reset requested");
2092 if (sbp2util_node_is_available(lu)) {
2093 SBP2_INFO("generating sbp2 fetch agent reset");
2094 sbp2_agent_reset(lu, 1);
2100 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2101 struct device_attribute *attr,
2104 struct scsi_device *sdev;
2107 if (!(sdev = to_scsi_device(dev)))
2110 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2113 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
2114 lu->ud->id, ORB_SET_LUN(lu->lun));
2117 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2118 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2119 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2120 MODULE_LICENSE("GPL");
2122 static int sbp2_module_init(void)
2126 if (sbp2_serialize_io) {
2127 sbp2_shost_template.can_queue = 1;
2128 sbp2_shost_template.cmd_per_lun = 1;
2131 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2132 (sbp2_max_sectors * 512) > (128 * 1024))
2133 sbp2_max_sectors = 128 * 1024 / 512;
2134 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2136 hpsb_register_highlevel(&sbp2_highlevel);
2137 ret = hpsb_register_protocol(&sbp2_driver);
2139 SBP2_ERR("Failed to register protocol");
2140 hpsb_unregister_highlevel(&sbp2_highlevel);
2146 static void __exit sbp2_module_exit(void)
2148 hpsb_unregister_protocol(&sbp2_driver);
2149 hpsb_unregister_highlevel(&sbp2_highlevel);
2152 module_init(sbp2_module_init);
2153 module_exit(sbp2_module_exit);