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;
473 unsigned long flags, orbs;
474 struct sbp2_command_info *cmd;
476 orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
478 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
479 for (i = 0; i < orbs; i++) {
480 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
482 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
485 cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
487 sizeof(struct sbp2_command_orb),
489 cmd->sge_dma = dma_map_single(hi->host->device.parent,
490 &cmd->scatter_gather_element,
491 sizeof(cmd->scatter_gather_element),
493 INIT_LIST_HEAD(&cmd->list);
494 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
496 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
500 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
502 struct hpsb_host *host = lu->hi->host;
503 struct list_head *lh, *next;
504 struct sbp2_command_info *cmd;
507 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
508 if (!list_empty(&lu->cmd_orb_completed))
509 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
510 cmd = list_entry(lh, struct sbp2_command_info, list);
511 dma_unmap_single(host->device.parent,
512 cmd->command_orb_dma,
513 sizeof(struct sbp2_command_orb),
515 dma_unmap_single(host->device.parent, cmd->sge_dma,
516 sizeof(cmd->scatter_gather_element),
520 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
525 * Finds the sbp2_command for a given outstanding command ORB.
526 * Only looks at the in-use list.
528 static struct sbp2_command_info *sbp2util_find_command_for_orb(
529 struct sbp2_lu *lu, dma_addr_t orb)
531 struct sbp2_command_info *cmd;
534 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
535 if (!list_empty(&lu->cmd_orb_inuse))
536 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
537 if (cmd->command_orb_dma == orb) {
538 spin_unlock_irqrestore(
539 &lu->cmd_orb_lock, flags);
542 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
547 * Finds the sbp2_command for a given outstanding SCpnt.
548 * Only looks at the in-use list.
549 * Must be called with lu->cmd_orb_lock held.
551 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
552 struct sbp2_lu *lu, void *SCpnt)
554 struct sbp2_command_info *cmd;
556 if (!list_empty(&lu->cmd_orb_inuse))
557 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
558 if (cmd->Current_SCpnt == SCpnt)
563 static struct sbp2_command_info *sbp2util_allocate_command_orb(
565 struct scsi_cmnd *Current_SCpnt,
566 void (*Current_done)(struct scsi_cmnd *))
568 struct list_head *lh;
569 struct sbp2_command_info *cmd = NULL;
572 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
573 if (!list_empty(&lu->cmd_orb_completed)) {
574 lh = lu->cmd_orb_completed.next;
576 cmd = list_entry(lh, struct sbp2_command_info, list);
577 cmd->Current_done = Current_done;
578 cmd->Current_SCpnt = Current_SCpnt;
579 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
581 SBP2_ERR("%s: no orbs available", __FUNCTION__);
582 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
587 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
588 * Must be called with lu->cmd_orb_lock held.
590 static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
591 struct sbp2_command_info *cmd)
593 struct hpsb_host *host = lu->ud->ne->host;
596 if (cmd->dma_type == CMD_DMA_SINGLE)
597 dma_unmap_single(host->device.parent, cmd->cmd_dma,
598 cmd->dma_size, cmd->dma_dir);
599 else if (cmd->dma_type == CMD_DMA_PAGE)
600 dma_unmap_page(host->device.parent, cmd->cmd_dma,
601 cmd->dma_size, cmd->dma_dir);
602 /* XXX: Check for CMD_DMA_NONE bug */
603 cmd->dma_type = CMD_DMA_NONE;
606 if (cmd->sge_buffer) {
607 dma_unmap_sg(host->device.parent, cmd->sge_buffer,
608 cmd->dma_size, cmd->dma_dir);
609 cmd->sge_buffer = NULL;
611 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
615 * Is lu valid? Is the 1394 node still present?
617 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
619 return lu && lu->ne && !lu->ne->in_limbo;
622 /*********************************************
623 * IEEE-1394 core driver stack related section
624 *********************************************/
626 static int sbp2_probe(struct device *dev)
628 struct unit_directory *ud;
631 ud = container_of(dev, struct unit_directory, device);
633 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
635 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
638 lu = sbp2_alloc_device(ud);
642 sbp2_parse_unit_directory(lu, ud);
643 return sbp2_start_device(lu);
646 static int sbp2_remove(struct device *dev)
648 struct unit_directory *ud;
650 struct scsi_device *sdev;
652 ud = container_of(dev, struct unit_directory, device);
653 lu = ud->device.driver_data;
658 /* Get rid of enqueued commands if there is no chance to
660 if (!sbp2util_node_is_available(lu))
661 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
662 /* scsi_remove_device() may trigger shutdown functions of SCSI
663 * highlevel drivers which would deadlock if blocked. */
664 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
665 scsi_unblock_requests(lu->shost);
670 scsi_remove_device(sdev);
673 sbp2_logout_device(lu);
674 sbp2_remove_device(lu);
679 static int sbp2_update(struct unit_directory *ud)
681 struct sbp2_lu *lu = ud->device.driver_data;
683 if (sbp2_reconnect_device(lu)) {
684 /* Reconnect has failed. Perhaps we didn't reconnect fast
685 * enough. Try a regular login, but first log out just in
686 * case of any weirdness. */
687 sbp2_logout_device(lu);
689 if (sbp2_login_device(lu)) {
690 /* Login failed too, just fail, and the backend
691 * will call our sbp2_remove for us */
692 SBP2_ERR("Failed to reconnect to sbp2 device!");
697 sbp2_set_busy_timeout(lu);
698 sbp2_agent_reset(lu, 1);
699 sbp2_max_speed_and_size(lu);
701 /* Complete any pending commands with busy (so they get retried)
702 * and remove them from our queue. */
703 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
705 /* Accept new commands unless there was another bus reset in the
707 if (hpsb_node_entry_valid(lu->ne)) {
708 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
709 scsi_unblock_requests(lu->shost);
714 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
716 struct sbp2_fwhost_info *hi;
717 struct Scsi_Host *shost = NULL;
718 struct sbp2_lu *lu = NULL;
720 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
722 SBP2_ERR("failed to create lu");
728 lu->speed_code = IEEE1394_SPEED_100;
729 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
730 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
731 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
732 INIT_LIST_HEAD(&lu->cmd_orb_completed);
733 INIT_LIST_HEAD(&lu->lu_list);
734 spin_lock_init(&lu->cmd_orb_lock);
735 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
736 INIT_WORK(&lu->protocol_work, NULL);
738 ud->device.driver_data = lu;
740 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
742 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
745 SBP2_ERR("failed to allocate hostinfo");
748 hi->host = ud->ne->host;
749 INIT_LIST_HEAD(&hi->logical_units);
751 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
752 /* Handle data movement if physical dma is not
753 * enabled or not supported on host controller */
754 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
756 0x0ULL, 0xfffffffcULL)) {
757 SBP2_ERR("failed to register lower 4GB address range");
761 if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) {
762 SBP2_ERR("failed to set 4GB DMA mask");
768 /* Prevent unloading of the 1394 host */
769 if (!try_module_get(hi->host->driver->owner)) {
770 SBP2_ERR("failed to get a reference on 1394 host driver");
776 list_add_tail(&lu->lu_list, &hi->logical_units);
778 /* Register the status FIFO address range. We could use the same FIFO
779 * for targets at different nodes. However we need different FIFOs per
780 * target in order to support multi-unit devices.
781 * The FIFO is located out of the local host controller's physical range
782 * but, if possible, within the posted write area. Status writes will
783 * then be performed as unified transactions. This slightly reduces
784 * bandwidth usage, and some Prolific based devices seem to require it.
786 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
787 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
788 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
789 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
790 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
791 SBP2_ERR("failed to allocate status FIFO address range");
795 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
797 SBP2_ERR("failed to register scsi host");
801 shost->hostdata[0] = (unsigned long)lu;
803 if (!scsi_add_host(shost, &ud->device)) {
808 SBP2_ERR("failed to add scsi host");
809 scsi_host_put(shost);
812 sbp2_remove_device(lu);
816 static void sbp2_host_reset(struct hpsb_host *host)
818 struct sbp2_fwhost_info *hi;
821 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
824 list_for_each_entry(lu, &hi->logical_units, lu_list)
825 if (likely(atomic_read(&lu->state) !=
826 SBP2LU_STATE_IN_SHUTDOWN)) {
827 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
828 scsi_block_requests(lu->shost);
832 static int sbp2_start_device(struct sbp2_lu *lu)
834 struct sbp2_fwhost_info *hi = lu->hi;
837 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
838 sizeof(struct sbp2_login_response),
839 &lu->login_response_dma, GFP_KERNEL);
840 if (!lu->login_response)
843 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
844 sizeof(struct sbp2_query_logins_orb),
845 &lu->query_logins_orb_dma, GFP_KERNEL);
846 if (!lu->query_logins_orb)
849 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
850 sizeof(struct sbp2_query_logins_response),
851 &lu->query_logins_response_dma, GFP_KERNEL);
852 if (!lu->query_logins_response)
855 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
856 sizeof(struct sbp2_reconnect_orb),
857 &lu->reconnect_orb_dma, GFP_KERNEL);
858 if (!lu->reconnect_orb)
861 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
862 sizeof(struct sbp2_logout_orb),
863 &lu->logout_orb_dma, GFP_KERNEL);
867 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
868 sizeof(struct sbp2_login_orb),
869 &lu->login_orb_dma, GFP_KERNEL);
873 if (sbp2util_create_command_orb_pool(lu)) {
874 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
875 sbp2_remove_device(lu);
879 /* Wait a second before trying to log in. Previously logged in
880 * initiators need a chance to reconnect. */
881 if (msleep_interruptible(1000)) {
882 sbp2_remove_device(lu);
886 if (sbp2_login_device(lu)) {
887 sbp2_remove_device(lu);
891 sbp2_set_busy_timeout(lu);
892 sbp2_agent_reset(lu, 1);
893 sbp2_max_speed_and_size(lu);
895 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
897 SBP2_ERR("scsi_add_device failed");
898 sbp2_logout_device(lu);
899 sbp2_remove_device(lu);
906 SBP2_ERR("Could not allocate memory for lu");
907 sbp2_remove_device(lu);
911 static void sbp2_remove_device(struct sbp2_lu *lu)
913 struct sbp2_fwhost_info *hi;
921 scsi_remove_host(lu->shost);
922 scsi_host_put(lu->shost);
924 flush_scheduled_work();
925 sbp2util_remove_command_orb_pool(lu);
927 list_del(&lu->lu_list);
929 if (lu->login_response)
930 dma_free_coherent(hi->host->device.parent,
931 sizeof(struct sbp2_login_response),
933 lu->login_response_dma);
935 dma_free_coherent(hi->host->device.parent,
936 sizeof(struct sbp2_login_orb),
939 if (lu->reconnect_orb)
940 dma_free_coherent(hi->host->device.parent,
941 sizeof(struct sbp2_reconnect_orb),
943 lu->reconnect_orb_dma);
945 dma_free_coherent(hi->host->device.parent,
946 sizeof(struct sbp2_logout_orb),
949 if (lu->query_logins_orb)
950 dma_free_coherent(hi->host->device.parent,
951 sizeof(struct sbp2_query_logins_orb),
952 lu->query_logins_orb,
953 lu->query_logins_orb_dma);
954 if (lu->query_logins_response)
955 dma_free_coherent(hi->host->device.parent,
956 sizeof(struct sbp2_query_logins_response),
957 lu->query_logins_response,
958 lu->query_logins_response_dma);
960 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
961 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
962 lu->status_fifo_addr);
964 lu->ud->device.driver_data = NULL;
967 module_put(hi->host->driver->owner);
972 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
974 * Deal with write requests on adapters which do not support physical DMA or
975 * have it switched off.
977 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
978 int destid, quadlet_t *data, u64 addr,
979 size_t length, u16 flags)
981 memcpy(bus_to_virt((u32) addr), data, length);
982 return RCODE_COMPLETE;
986 * Deal with read requests on adapters which do not support physical DMA or
987 * have it switched off.
989 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
990 quadlet_t *data, u64 addr, size_t length,
993 memcpy(data, bus_to_virt((u32) addr), length);
994 return RCODE_COMPLETE;
998 /**************************************
999 * SBP-2 protocol related section
1000 **************************************/
1002 static int sbp2_query_logins(struct sbp2_lu *lu)
1004 struct sbp2_fwhost_info *hi = lu->hi;
1009 lu->query_logins_orb->reserved1 = 0x0;
1010 lu->query_logins_orb->reserved2 = 0x0;
1012 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1013 lu->query_logins_orb->query_response_hi =
1014 ORB_SET_NODE_ID(hi->host->node_id);
1015 lu->query_logins_orb->lun_misc =
1016 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1017 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1018 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1020 lu->query_logins_orb->reserved_resp_length =
1021 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1022 sizeof(struct sbp2_query_logins_response));
1024 lu->query_logins_orb->status_fifo_hi =
1025 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1026 lu->query_logins_orb->status_fifo_lo =
1027 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1029 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1030 sizeof(struct sbp2_query_logins_orb));
1032 memset(lu->query_logins_response, 0,
1033 sizeof(struct sbp2_query_logins_response));
1035 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1036 data[1] = lu->query_logins_orb_dma;
1037 sbp2util_cpu_to_be32_buffer(data, 8);
1039 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1041 if (sbp2util_access_timeout(lu, 2*HZ)) {
1042 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1046 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1047 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1051 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1052 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1056 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1057 sizeof(struct sbp2_query_logins_response));
1059 max_logins = RESPONSE_GET_MAX_LOGINS(
1060 lu->query_logins_response->length_max_logins);
1061 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1063 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1064 lu->query_logins_response->length_max_logins);
1065 SBP2_INFO("Number of active logins: %d", active_logins);
1067 if (active_logins >= max_logins) {
1074 static int sbp2_login_device(struct sbp2_lu *lu)
1076 struct sbp2_fwhost_info *hi = lu->hi;
1082 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1083 SBP2_INFO("Device does not support any more concurrent logins");
1087 /* assume no password */
1088 lu->login_orb->password_hi = 0;
1089 lu->login_orb->password_lo = 0;
1091 lu->login_orb->login_response_lo = lu->login_response_dma;
1092 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1093 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1095 /* one second reconnect time */
1096 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1097 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1098 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1099 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1101 lu->login_orb->passwd_resp_lengths =
1102 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1104 lu->login_orb->status_fifo_hi =
1105 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1106 lu->login_orb->status_fifo_lo =
1107 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1109 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1110 sizeof(struct sbp2_login_orb));
1112 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1114 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1115 data[1] = lu->login_orb_dma;
1116 sbp2util_cpu_to_be32_buffer(data, 8);
1118 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1120 /* wait up to 20 seconds for login status */
1121 if (sbp2util_access_timeout(lu, 20*HZ)) {
1122 SBP2_ERR("Error logging into SBP-2 device - timed out");
1126 /* make sure that the returned status matches the login ORB */
1127 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1128 SBP2_ERR("Error logging into SBP-2 device - timed out");
1132 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1133 SBP2_ERR("Error logging into SBP-2 device - failed");
1137 sbp2util_cpu_to_be32_buffer(lu->login_response,
1138 sizeof(struct sbp2_login_response));
1139 lu->command_block_agent_addr =
1140 ((u64)lu->login_response->command_block_agent_hi) << 32;
1141 lu->command_block_agent_addr |=
1142 ((u64)lu->login_response->command_block_agent_lo);
1143 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1145 SBP2_INFO("Logged into SBP-2 device");
1149 static int sbp2_logout_device(struct sbp2_lu *lu)
1151 struct sbp2_fwhost_info *hi = lu->hi;
1155 lu->logout_orb->reserved1 = 0x0;
1156 lu->logout_orb->reserved2 = 0x0;
1157 lu->logout_orb->reserved3 = 0x0;
1158 lu->logout_orb->reserved4 = 0x0;
1160 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1161 lu->logout_orb->login_ID_misc |=
1162 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1163 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1165 lu->logout_orb->reserved5 = 0x0;
1166 lu->logout_orb->status_fifo_hi =
1167 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1168 lu->logout_orb->status_fifo_lo =
1169 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1171 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1172 sizeof(struct sbp2_logout_orb));
1174 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1175 data[1] = lu->logout_orb_dma;
1176 sbp2util_cpu_to_be32_buffer(data, 8);
1178 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1182 /* wait up to 1 second for the device to complete logout */
1183 if (sbp2util_access_timeout(lu, HZ))
1186 SBP2_INFO("Logged out of SBP-2 device");
1190 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1192 struct sbp2_fwhost_info *hi = lu->hi;
1196 lu->reconnect_orb->reserved1 = 0x0;
1197 lu->reconnect_orb->reserved2 = 0x0;
1198 lu->reconnect_orb->reserved3 = 0x0;
1199 lu->reconnect_orb->reserved4 = 0x0;
1201 lu->reconnect_orb->login_ID_misc =
1202 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1203 lu->reconnect_orb->login_ID_misc |=
1204 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1205 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1207 lu->reconnect_orb->reserved5 = 0x0;
1208 lu->reconnect_orb->status_fifo_hi =
1209 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1210 lu->reconnect_orb->status_fifo_lo =
1211 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1213 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1214 sizeof(struct sbp2_reconnect_orb));
1216 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1217 data[1] = lu->reconnect_orb_dma;
1218 sbp2util_cpu_to_be32_buffer(data, 8);
1220 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1224 /* wait up to 1 second for reconnect status */
1225 if (sbp2util_access_timeout(lu, HZ)) {
1226 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1230 /* make sure that the returned status matches the reconnect ORB */
1231 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1232 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1236 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1237 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1241 SBP2_INFO("Reconnected to SBP-2 device");
1246 * Set the target node's Single Phase Retry limit. Affects the target's retry
1247 * behaviour if our node is too busy to accept requests.
1249 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1253 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1254 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1255 SBP2_ERR("%s error", __FUNCTION__);
1259 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1260 struct unit_directory *ud)
1262 struct csr1212_keyval *kv;
1263 struct csr1212_dentry *dentry;
1264 u64 management_agent_addr;
1265 u32 unit_characteristics, firmware_revision;
1266 unsigned workarounds;
1269 management_agent_addr = 0;
1270 unit_characteristics = 0;
1271 firmware_revision = 0;
1273 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1274 switch (kv->key.id) {
1275 case CSR1212_KV_ID_DEPENDENT_INFO:
1276 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1277 management_agent_addr =
1278 CSR1212_REGISTER_SPACE_BASE +
1279 (kv->value.csr_offset << 2);
1281 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1282 lu->lun = ORB_SET_LUN(kv->value.immediate);
1285 case SBP2_UNIT_CHARACTERISTICS_KEY:
1286 /* FIXME: This is ignored so far.
1287 * See SBP-2 clause 7.4.8. */
1288 unit_characteristics = kv->value.immediate;
1291 case SBP2_FIRMWARE_REVISION_KEY:
1292 firmware_revision = kv->value.immediate;
1296 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1297 * Its "ordered" bit has consequences for command ORB
1298 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1303 workarounds = sbp2_default_workarounds;
1305 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1306 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1307 if (sbp2_workarounds_table[i].firmware_revision !=
1308 SBP2_ROM_VALUE_WILDCARD &&
1309 sbp2_workarounds_table[i].firmware_revision !=
1310 (firmware_revision & 0xffff00))
1312 if (sbp2_workarounds_table[i].model_id !=
1313 SBP2_ROM_VALUE_WILDCARD &&
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.parent,
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.parent, sgpnt,
1461 scsi_use_sg, dma_dir);
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.parent,
1512 scsi_request_buffer,
1513 cmd->dma_size, cmd->dma_dir);
1514 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1515 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1517 /* handle case where we get a command w/o s/g enabled
1518 * (but check for transfers larger than 64K) */
1519 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1521 orb->data_descriptor_lo = cmd->cmd_dma;
1522 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1525 /* The buffer is too large. Turn this into page tables. */
1527 struct sbp2_unrestricted_page_table *sg_element =
1528 &cmd->scatter_gather_element[0];
1529 u32 sg_count, sg_len;
1532 orb->data_descriptor_lo = cmd->sge_dma;
1533 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1535 /* fill out our SBP-2 page tables; split up the large buffer */
1537 sg_len = scsi_request_bufflen;
1538 sg_addr = cmd->cmd_dma;
1540 sg_element[sg_count].segment_base_lo = sg_addr;
1541 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1542 sg_element[sg_count].length_segment_base_hi =
1543 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1544 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1545 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1547 sg_element[sg_count].length_segment_base_hi =
1548 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1554 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1556 sbp2util_cpu_to_be32_buffer(sg_element,
1557 (sizeof(struct sbp2_unrestricted_page_table)) *
1562 static void sbp2_create_command_orb(struct sbp2_lu *lu,
1563 struct sbp2_command_info *cmd,
1565 unsigned int scsi_use_sg,
1566 unsigned int scsi_request_bufflen,
1567 void *scsi_request_buffer,
1568 enum dma_data_direction dma_dir)
1570 struct sbp2_fwhost_info *hi = lu->hi;
1571 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1572 struct sbp2_command_orb *orb = &cmd->command_orb;
1576 * Set-up our command ORB.
1578 * NOTE: We're doing unrestricted page tables (s/g), as this is
1579 * best performance (at least with the devices I have). This means
1580 * that data_size becomes the number of s/g elements, and
1581 * page_size should be zero (for unrestricted).
1583 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1584 orb->next_ORB_lo = 0x0;
1585 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1586 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1587 orb->misc |= ORB_SET_NOTIFY(1);
1589 if (dma_dir == DMA_NONE)
1590 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1591 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1592 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1593 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1594 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1596 SBP2_INFO("Falling back to DMA_NONE");
1597 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1600 /* set up our page table stuff */
1601 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1602 orb->data_descriptor_hi = 0x0;
1603 orb->data_descriptor_lo = 0x0;
1604 orb->misc |= ORB_SET_DIRECTION(1);
1605 } else if (scsi_use_sg)
1606 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
1607 orb_direction, dma_dir);
1609 sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
1610 scsi_request_bufflen,
1611 scsi_request_buffer, dma_dir);
1613 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1615 memset(orb->cdb, 0, 12);
1616 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1619 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1620 struct sbp2_command_info *cmd)
1622 struct sbp2_fwhost_info *hi = lu->hi;
1623 struct sbp2_command_orb *last_orb;
1624 dma_addr_t last_orb_dma;
1625 u64 addr = lu->command_block_agent_addr;
1628 unsigned long flags;
1630 dma_sync_single_for_device(hi->host->device.parent,
1631 cmd->command_orb_dma,
1632 sizeof(struct sbp2_command_orb),
1634 dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
1635 sizeof(cmd->scatter_gather_element),
1638 /* check to see if there are any previous orbs to use */
1639 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1640 last_orb = lu->last_orb;
1641 last_orb_dma = lu->last_orb_dma;
1644 * last_orb == NULL means: We know that the target's fetch agent
1645 * is not active right now.
1647 addr += SBP2_ORB_POINTER_OFFSET;
1648 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1649 data[1] = cmd->command_orb_dma;
1650 sbp2util_cpu_to_be32_buffer(data, 8);
1654 * last_orb != NULL means: We know that the target's fetch agent
1655 * is (very probably) not dead or in reset state right now.
1656 * We have an ORB already sent that we can append a new one to.
1657 * The target's fetch agent may or may not have read this
1660 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
1661 sizeof(struct sbp2_command_orb),
1663 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1665 /* Tells hardware that this pointer is valid */
1666 last_orb->next_ORB_hi = 0;
1667 dma_sync_single_for_device(hi->host->device.parent,
1669 sizeof(struct sbp2_command_orb),
1671 addr += SBP2_DOORBELL_OFFSET;
1675 lu->last_orb = &cmd->command_orb;
1676 lu->last_orb_dma = cmd->command_orb_dma;
1677 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1679 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1681 * sbp2util_node_write_no_wait failed. We certainly ran out
1682 * of transaction labels, perhaps just because there were no
1683 * context switches which gave khpsbpkt a chance to collect
1684 * free tlabels. Try again in non-atomic context. If necessary,
1685 * the workqueue job will sleep to guaranteedly get a tlabel.
1686 * We do not accept new commands until the job is over.
1688 scsi_block_requests(lu->shost);
1689 PREPARE_WORK(&lu->protocol_work,
1690 last_orb ? sbp2util_write_doorbell:
1691 sbp2util_write_orb_pointer);
1692 schedule_work(&lu->protocol_work);
1696 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1697 void (*done)(struct scsi_cmnd *))
1699 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
1700 unsigned int request_bufflen = SCpnt->request_bufflen;
1701 struct sbp2_command_info *cmd;
1703 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1707 sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
1708 request_bufflen, SCpnt->request_buffer,
1709 SCpnt->sc_data_direction);
1710 sbp2_link_orb_command(lu, cmd);
1716 * Translates SBP-2 status into SCSI sense data for check conditions
1718 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1721 /* OK, it's pretty ugly... ;-) */
1722 sense_data[0] = 0x70;
1723 sense_data[1] = 0x0;
1724 sense_data[2] = sbp2_status[9];
1725 sense_data[3] = sbp2_status[12];
1726 sense_data[4] = sbp2_status[13];
1727 sense_data[5] = sbp2_status[14];
1728 sense_data[6] = sbp2_status[15];
1730 sense_data[8] = sbp2_status[16];
1731 sense_data[9] = sbp2_status[17];
1732 sense_data[10] = sbp2_status[18];
1733 sense_data[11] = sbp2_status[19];
1734 sense_data[12] = sbp2_status[10];
1735 sense_data[13] = sbp2_status[11];
1736 sense_data[14] = sbp2_status[20];
1737 sense_data[15] = sbp2_status[21];
1739 return sbp2_status[8] & 0x3f;
1742 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1743 int destid, quadlet_t *data, u64 addr,
1744 size_t length, u16 fl)
1746 struct sbp2_fwhost_info *hi;
1747 struct sbp2_lu *lu = NULL, *lu_tmp;
1748 struct scsi_cmnd *SCpnt = NULL;
1749 struct sbp2_status_block *sb;
1750 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1751 struct sbp2_command_info *cmd;
1752 unsigned long flags;
1754 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1755 SBP2_ERR("Wrong size of status block");
1756 return RCODE_ADDRESS_ERROR;
1758 if (unlikely(!host)) {
1759 SBP2_ERR("host is NULL - this is bad!");
1760 return RCODE_ADDRESS_ERROR;
1762 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1763 if (unlikely(!hi)) {
1764 SBP2_ERR("host info is NULL - this is bad!");
1765 return RCODE_ADDRESS_ERROR;
1768 /* Find the unit which wrote the status. */
1769 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1770 if (lu_tmp->ne->nodeid == nodeid &&
1771 lu_tmp->status_fifo_addr == addr) {
1776 if (unlikely(!lu)) {
1777 SBP2_ERR("lu is NULL - device is gone?");
1778 return RCODE_ADDRESS_ERROR;
1781 /* Put response into lu status fifo buffer. The first two bytes
1782 * come in big endian bit order. Often the target writes only a
1783 * truncated status block, minimally the first two quadlets. The rest
1784 * is implied to be zeros. */
1785 sb = &lu->status_block;
1786 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1787 memcpy(sb, data, length);
1788 sbp2util_be32_to_cpu_buffer(sb, 8);
1790 /* Ignore unsolicited status. Handle command ORB status. */
1791 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1794 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1796 dma_sync_single_for_cpu(hi->host->device.parent,
1797 cmd->command_orb_dma,
1798 sizeof(struct sbp2_command_orb),
1800 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1801 sizeof(cmd->scatter_gather_element),
1803 /* Grab SCSI command pointers and check status. */
1805 * FIXME: If the src field in the status is 1, the ORB DMA must
1806 * not be reused until status for a subsequent ORB is received.
1808 SCpnt = cmd->Current_SCpnt;
1809 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1810 sbp2util_mark_command_completed(lu, cmd);
1811 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1814 u32 h = sb->ORB_offset_hi_misc;
1815 u32 r = STATUS_GET_RESP(h);
1817 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1818 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1819 r, STATUS_GET_SBP_STATUS(h));
1821 r == RESP_STATUS_TRANSPORT_FAILURE ?
1822 SBP2_SCSI_STATUS_BUSY :
1823 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1826 if (STATUS_GET_LEN(h) > 1)
1827 scsi_status = sbp2_status_to_sense_data(
1828 (unchar *)sb, SCpnt->sense_buffer);
1830 if (STATUS_TEST_DEAD(h))
1831 sbp2_agent_reset(lu, 0);
1834 /* Check here to see if there are no commands in-use. If there
1835 * are none, we know that the fetch agent left the active state
1836 * _and_ that we did not reactivate it yet. Therefore clear
1837 * last_orb so that next time we write directly to the
1838 * ORB_POINTER register. That way the fetch agent does not need
1839 * to refetch the next_ORB. */
1840 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1841 if (list_empty(&lu->cmd_orb_inuse))
1842 lu->last_orb = NULL;
1843 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1846 /* It's probably status after a management request. */
1847 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1848 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1849 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1850 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1851 lu->access_complete = 1;
1852 wake_up_interruptible(&sbp2_access_wq);
1857 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1859 return RCODE_COMPLETE;
1862 /**************************************
1863 * SCSI interface related section
1864 **************************************/
1866 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1867 void (*done)(struct scsi_cmnd *))
1869 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1870 struct sbp2_fwhost_info *hi;
1871 int result = DID_NO_CONNECT << 16;
1873 if (unlikely(!sbp2util_node_is_available(lu)))
1878 if (unlikely(!hi)) {
1879 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1883 /* Multiple units are currently represented to the SCSI core as separate
1884 * targets, not as one target with multiple LUs. Therefore return
1885 * selection time-out to any IO directed at non-zero LUNs. */
1886 if (unlikely(SCpnt->device->lun))
1889 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1890 SBP2_ERR("Bus reset in progress - rejecting command");
1891 result = DID_BUS_BUSY << 16;
1895 /* Bidirectional commands are not yet implemented,
1896 * and unknown transfer direction not handled. */
1897 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1898 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1899 result = DID_ERROR << 16;
1903 if (sbp2_send_command(lu, SCpnt, done)) {
1904 SBP2_ERR("Error sending SCSI command");
1905 sbp2scsi_complete_command(lu,
1906 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1912 SCpnt->result = result;
1917 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1919 struct sbp2_fwhost_info *hi = lu->hi;
1920 struct list_head *lh;
1921 struct sbp2_command_info *cmd;
1922 unsigned long flags;
1924 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1925 while (!list_empty(&lu->cmd_orb_inuse)) {
1926 lh = lu->cmd_orb_inuse.next;
1927 cmd = list_entry(lh, struct sbp2_command_info, list);
1928 dma_sync_single_for_cpu(hi->host->device.parent,
1929 cmd->command_orb_dma,
1930 sizeof(struct sbp2_command_orb),
1932 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1933 sizeof(cmd->scatter_gather_element),
1935 sbp2util_mark_command_completed(lu, cmd);
1936 if (cmd->Current_SCpnt) {
1937 cmd->Current_SCpnt->result = status << 16;
1938 cmd->Current_done(cmd->Current_SCpnt);
1941 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1947 * Complete a regular SCSI command. Can be called in atomic context.
1949 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1950 struct scsi_cmnd *SCpnt,
1951 void (*done)(struct scsi_cmnd *))
1954 SBP2_ERR("SCpnt is NULL");
1958 switch (scsi_status) {
1959 case SBP2_SCSI_STATUS_GOOD:
1960 SCpnt->result = DID_OK << 16;
1963 case SBP2_SCSI_STATUS_BUSY:
1964 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1965 SCpnt->result = DID_BUS_BUSY << 16;
1968 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1969 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1972 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1973 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1974 SCpnt->result = DID_NO_CONNECT << 16;
1975 scsi_print_command(SCpnt);
1978 case SBP2_SCSI_STATUS_CONDITION_MET:
1979 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1980 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1981 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1982 SCpnt->result = DID_ERROR << 16;
1983 scsi_print_command(SCpnt);
1987 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1988 SCpnt->result = DID_ERROR << 16;
1991 /* If a bus reset is in progress and there was an error, complete
1992 * the command as busy so that it will get retried. */
1993 if (!hpsb_node_entry_valid(lu->ne)
1994 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1995 SBP2_ERR("Completing command with busy (bus reset)");
1996 SCpnt->result = DID_BUS_BUSY << 16;
1999 /* Tell the SCSI stack that we're done with this command. */
2003 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2005 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2008 sdev->allow_restart = 1;
2010 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2011 sdev->inquiry_len = 36;
2015 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2017 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2019 sdev->use_10_for_rw = 1;
2021 if (sdev->type == TYPE_ROM)
2022 sdev->use_10_for_ms = 1;
2023 if (sdev->type == TYPE_DISK &&
2024 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2025 sdev->skip_ms_page_8 = 1;
2026 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2027 sdev->fix_capacity = 1;
2031 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2033 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2038 * Called by scsi stack when something has really gone wrong.
2039 * Usually called when a command has timed-out for some reason.
2041 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2043 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2044 struct sbp2_fwhost_info *hi = lu->hi;
2045 struct sbp2_command_info *cmd;
2046 unsigned long flags;
2048 SBP2_INFO("aborting sbp2 command");
2049 scsi_print_command(SCpnt);
2051 if (sbp2util_node_is_available(lu)) {
2052 sbp2_agent_reset(lu, 1);
2054 /* Return a matching command structure to the free pool. */
2055 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2056 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2058 dma_sync_single_for_cpu(hi->host->device.parent,
2059 cmd->command_orb_dma,
2060 sizeof(struct sbp2_command_orb),
2062 dma_sync_single_for_cpu(hi->host->device.parent,
2064 sizeof(cmd->scatter_gather_element),
2066 sbp2util_mark_command_completed(lu, cmd);
2067 if (cmd->Current_SCpnt) {
2068 cmd->Current_SCpnt->result = DID_ABORT << 16;
2069 cmd->Current_done(cmd->Current_SCpnt);
2072 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2074 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2081 * Called by scsi stack when something has really gone wrong.
2083 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2085 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2087 SBP2_INFO("reset requested");
2089 if (sbp2util_node_is_available(lu)) {
2090 SBP2_INFO("generating sbp2 fetch agent reset");
2091 sbp2_agent_reset(lu, 1);
2097 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2098 struct device_attribute *attr,
2101 struct scsi_device *sdev;
2104 if (!(sdev = to_scsi_device(dev)))
2107 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2110 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
2111 lu->ud->id, ORB_SET_LUN(lu->lun));
2114 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2115 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2116 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2117 MODULE_LICENSE("GPL");
2119 static int sbp2_module_init(void)
2123 if (sbp2_serialize_io) {
2124 sbp2_shost_template.can_queue = 1;
2125 sbp2_shost_template.cmd_per_lun = 1;
2128 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2129 (sbp2_max_sectors * 512) > (128 * 1024))
2130 sbp2_max_sectors = 128 * 1024 / 512;
2131 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2133 hpsb_register_highlevel(&sbp2_highlevel);
2134 ret = hpsb_register_protocol(&sbp2_driver);
2136 SBP2_ERR("Failed to register protocol");
2137 hpsb_unregister_highlevel(&sbp2_highlevel);
2143 static void __exit sbp2_module_exit(void)
2145 hpsb_unregister_protocol(&sbp2_driver);
2146 hpsb_unregister_highlevel(&sbp2_highlevel);
2149 module_init(sbp2_module_init);
2150 module_exit(sbp2_module_exit);