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>
63 #include <linux/module.h>
64 #include <linux/moduleparam.h>
65 #include <linux/sched.h>
66 #include <linux/slab.h>
67 #include <linux/spinlock.h>
68 #include <linux/stat.h>
69 #include <linux/string.h>
70 #include <linux/stringify.h>
71 #include <linux/types.h>
72 #include <linux/wait.h>
73 #include <linux/workqueue.h>
75 #include <asm/byteorder.h>
76 #include <asm/errno.h>
77 #include <asm/param.h>
78 #include <asm/scatterlist.h>
79 #include <asm/system.h>
80 #include <asm/types.h>
82 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
83 #include <asm/io.h> /* for bus_to_virt */
86 #include <scsi/scsi.h>
87 #include <scsi/scsi_cmnd.h>
88 #include <scsi/scsi_dbg.h>
89 #include <scsi/scsi_device.h>
90 #include <scsi/scsi_host.h>
93 #include "highlevel.h"
96 #include "ieee1394_core.h"
97 #include "ieee1394_hotplug.h"
98 #include "ieee1394_transactions.h"
99 #include "ieee1394_types.h"
104 * Module load parameter definitions
108 * Change max_speed on module load if you have a bad IEEE-1394
109 * controller that has trouble running 2KB packets at 400mb.
111 * NOTE: On certain OHCI parts I have seen short packets on async transmit
112 * (probably due to PCI latency/throughput issues with the part). You can
113 * bump down the speed if you are running into problems.
115 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
116 module_param_named(max_speed, sbp2_max_speed, int, 0644);
117 MODULE_PARM_DESC(max_speed, "Force max speed "
118 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
121 * Set serialize_io to 1 if you'd like only one scsi command sent
122 * down to us at a time (debugging). This might be necessary for very
123 * badly behaved sbp2 devices.
125 static int sbp2_serialize_io = 1;
126 module_param_named(serialize_io, sbp2_serialize_io, int, 0444);
127 MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers "
128 "(default = 1, faster = 0)");
131 * Bump up max_sectors if you'd like to support very large sized
132 * transfers. Please note that some older sbp2 bridge chips are broken for
133 * transfers greater or equal to 128KB. Default is a value of 255
134 * sectors, or just under 128KB (at 512 byte sector size). I can note that
135 * the Oxsemi sbp2 chipsets have no problems supporting very large
138 static int sbp2_max_sectors = SBP2_MAX_SECTORS;
139 module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
140 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
141 "(default = " __stringify(SBP2_MAX_SECTORS) ")");
144 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
145 * do an exclusive login, as it's generally unsafe to have two hosts
146 * talking to a single sbp2 device at the same time (filesystem coherency,
147 * etc.). If you're running an sbp2 device that supports multiple logins,
148 * and you're either running read-only filesystems or some sort of special
149 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
150 * File System, or Lustre, then set exclusive_login to zero.
152 * So far only bridges from Oxford Semiconductor are known to support
153 * concurrent logins. Depending on firmware, four or two concurrent logins
154 * are possible on OXFW911 and newer Oxsemi bridges.
156 static int sbp2_exclusive_login = 1;
157 module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644);
158 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
162 * If any of the following workarounds is required for your device to work,
163 * please submit the kernel messages logged by sbp2 to the linux1394-devel
166 * - 128kB max transfer
167 * Limit transfer size. Necessary for some old bridges.
170 * When scsi_mod probes the device, let the inquiry command look like that
174 * Suppress sending of mode_sense for mode page 8 if the device pretends to
175 * support the SCSI Primary Block commands instead of Reduced Block Commands.
178 * Tell sd_mod to correct the last sector number reported by read_capacity.
179 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
180 * Don't use this with devices which don't have this bug.
182 * - override internal blacklist
183 * Instead of adding to the built-in blacklist, use only the workarounds
184 * specified in the module load parameter.
185 * Useful if a blacklist entry interfered with a non-broken device.
187 static int sbp2_default_workarounds;
188 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
189 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
190 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
191 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
192 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
193 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
194 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
195 ", or a combination)");
198 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
199 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204 static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
205 static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
206 void (*)(struct scsi_cmnd *));
207 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
208 static int sbp2_start_device(struct sbp2_lu *);
209 static void sbp2_remove_device(struct sbp2_lu *);
210 static int sbp2_login_device(struct sbp2_lu *);
211 static int sbp2_reconnect_device(struct sbp2_lu *);
212 static int sbp2_logout_device(struct sbp2_lu *);
213 static void sbp2_host_reset(struct hpsb_host *);
214 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
216 static int sbp2_agent_reset(struct sbp2_lu *, int);
217 static void sbp2_parse_unit_directory(struct sbp2_lu *,
218 struct unit_directory *);
219 static int sbp2_set_busy_timeout(struct sbp2_lu *);
220 static int sbp2_max_speed_and_size(struct sbp2_lu *);
223 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
225 static struct hpsb_highlevel sbp2_highlevel = {
226 .name = SBP2_DEVICE_NAME,
227 .host_reset = sbp2_host_reset,
230 static struct hpsb_address_ops sbp2_ops = {
231 .write = sbp2_handle_status_write
234 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
235 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
237 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
240 static struct hpsb_address_ops sbp2_physdma_ops = {
241 .read = sbp2_handle_physdma_read,
242 .write = sbp2_handle_physdma_write,
248 * Interface to driver core and IEEE 1394 core
250 static struct ieee1394_device_id sbp2_id_table[] = {
252 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
253 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
254 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
257 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
259 static int sbp2_probe(struct device *);
260 static int sbp2_remove(struct device *);
261 static int sbp2_update(struct unit_directory *);
263 static struct hpsb_protocol_driver sbp2_driver = {
264 .name = SBP2_DEVICE_NAME,
265 .id_table = sbp2_id_table,
266 .update = sbp2_update,
269 .remove = sbp2_remove,
275 * Interface to SCSI core
277 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
278 void (*)(struct scsi_cmnd *));
279 static int sbp2scsi_abort(struct scsi_cmnd *);
280 static int sbp2scsi_reset(struct scsi_cmnd *);
281 static int sbp2scsi_slave_alloc(struct scsi_device *);
282 static int sbp2scsi_slave_configure(struct scsi_device *);
283 static void sbp2scsi_slave_destroy(struct scsi_device *);
284 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
285 struct device_attribute *, char *);
287 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
289 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
290 &dev_attr_ieee1394_id,
294 static struct scsi_host_template sbp2_shost_template = {
295 .module = THIS_MODULE,
296 .name = "SBP-2 IEEE-1394",
297 .proc_name = SBP2_DEVICE_NAME,
298 .queuecommand = sbp2scsi_queuecommand,
299 .eh_abort_handler = sbp2scsi_abort,
300 .eh_device_reset_handler = sbp2scsi_reset,
301 .slave_alloc = sbp2scsi_slave_alloc,
302 .slave_configure = sbp2scsi_slave_configure,
303 .slave_destroy = sbp2scsi_slave_destroy,
305 .sg_tablesize = SG_ALL,
306 .use_clustering = ENABLE_CLUSTERING,
307 .cmd_per_lun = SBP2_MAX_CMDS,
308 .can_queue = SBP2_MAX_CMDS,
309 .sdev_attrs = sbp2_sysfs_sdev_attrs,
312 /* for match-all entries in sbp2_workarounds_table */
313 #define SBP2_ROM_VALUE_WILDCARD 0x1000000
316 * List of devices with known bugs.
318 * The firmware_revision field, masked with 0xffff00, is the best indicator
319 * for the type of bridge chip of a device. It yields a few false positives
320 * but this did not break correctly behaving devices so far.
322 static const struct {
323 u32 firmware_revision;
325 unsigned workarounds;
326 } sbp2_workarounds_table[] = {
327 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
328 .firmware_revision = 0x002800,
329 .model_id = 0x001010,
330 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
331 SBP2_WORKAROUND_MODE_SENSE_8,
333 /* Initio bridges, actually only needed for some older ones */ {
334 .firmware_revision = 0x000200,
335 .model_id = SBP2_ROM_VALUE_WILDCARD,
336 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
338 /* Symbios bridge */ {
339 .firmware_revision = 0xa0b800,
340 .model_id = SBP2_ROM_VALUE_WILDCARD,
341 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
343 /* iPod 4th generation */ {
344 .firmware_revision = 0x0a2700,
345 .model_id = 0x000021,
346 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
349 .firmware_revision = 0x0a2700,
350 .model_id = 0x000023,
351 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
354 .firmware_revision = 0x0a2700,
355 .model_id = 0x00007e,
356 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
360 /**************************************
361 * General utility functions
362 **************************************/
366 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
368 static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
372 for (length = (length >> 2); length--; )
373 temp[length] = be32_to_cpu(temp[length]);
377 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
379 static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
383 for (length = (length >> 2); length--; )
384 temp[length] = cpu_to_be32(temp[length]);
386 #else /* BIG_ENDIAN */
387 /* Why waste the cpu cycles? */
388 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
389 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
392 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
395 * Waits for completion of an SBP-2 access request.
396 * Returns nonzero if timed out or prematurely interrupted.
398 static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
402 leftover = wait_event_interruptible_timeout(
403 sbp2_access_wq, lu->access_complete, timeout);
404 lu->access_complete = 0;
405 return leftover <= 0;
408 static void sbp2_free_packet(void *packet)
410 hpsb_free_tlabel(packet);
411 hpsb_free_packet(packet);
415 * This is much like hpsb_node_write(), except it ignores the response
416 * subaction and returns immediately. Can be used from atomic context.
418 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
419 quadlet_t *buf, size_t len)
421 struct hpsb_packet *packet;
423 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
427 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
428 hpsb_node_fill_packet(ne, packet);
429 if (hpsb_send_packet(packet) < 0) {
430 sbp2_free_packet(packet);
436 static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
437 quadlet_t *data, size_t len)
439 /* There is a small window after a bus reset within which the node
440 * entry's generation is current but the reconnect wasn't completed. */
441 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
444 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
446 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
448 /* Now accept new SCSI commands, unless a bus reset happended during
449 * hpsb_node_write. */
450 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
451 scsi_unblock_requests(lu->shost);
454 static void sbp2util_write_orb_pointer(struct work_struct *work)
456 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
459 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
460 data[1] = lu->last_orb_dma;
461 sbp2util_cpu_to_be32_buffer(data, 8);
462 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
465 static void sbp2util_write_doorbell(struct work_struct *work)
467 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
469 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
472 static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
474 struct sbp2_fwhost_info *hi = lu->hi;
475 struct sbp2_command_info *cmd;
476 int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
478 for (i = 0; i < orbs; i++) {
479 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
482 cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
484 sizeof(struct sbp2_command_orb),
486 cmd->sge_dma = dma_map_single(hi->host->device.parent,
487 &cmd->scatter_gather_element,
488 sizeof(cmd->scatter_gather_element),
490 INIT_LIST_HEAD(&cmd->list);
491 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
496 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
498 struct hpsb_host *host = lu->hi->host;
499 struct list_head *lh, *next;
500 struct sbp2_command_info *cmd;
503 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
504 if (!list_empty(&lu->cmd_orb_completed))
505 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
506 cmd = list_entry(lh, struct sbp2_command_info, list);
507 dma_unmap_single(host->device.parent,
508 cmd->command_orb_dma,
509 sizeof(struct sbp2_command_orb),
511 dma_unmap_single(host->device.parent, cmd->sge_dma,
512 sizeof(cmd->scatter_gather_element),
516 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
521 * Finds the sbp2_command for a given outstanding command ORB.
522 * Only looks at the in-use list.
524 static struct sbp2_command_info *sbp2util_find_command_for_orb(
525 struct sbp2_lu *lu, dma_addr_t orb)
527 struct sbp2_command_info *cmd;
530 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
531 if (!list_empty(&lu->cmd_orb_inuse))
532 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
533 if (cmd->command_orb_dma == orb) {
534 spin_unlock_irqrestore(
535 &lu->cmd_orb_lock, flags);
538 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
543 * Finds the sbp2_command for a given outstanding SCpnt.
544 * Only looks at the in-use list.
545 * Must be called with lu->cmd_orb_lock held.
547 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
548 struct sbp2_lu *lu, void *SCpnt)
550 struct sbp2_command_info *cmd;
552 if (!list_empty(&lu->cmd_orb_inuse))
553 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
554 if (cmd->Current_SCpnt == SCpnt)
559 static struct sbp2_command_info *sbp2util_allocate_command_orb(
561 struct scsi_cmnd *Current_SCpnt,
562 void (*Current_done)(struct scsi_cmnd *))
564 struct list_head *lh;
565 struct sbp2_command_info *cmd = NULL;
568 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
569 if (!list_empty(&lu->cmd_orb_completed)) {
570 lh = lu->cmd_orb_completed.next;
572 cmd = list_entry(lh, struct sbp2_command_info, list);
573 cmd->Current_done = Current_done;
574 cmd->Current_SCpnt = Current_SCpnt;
575 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
577 SBP2_ERR("%s: no orbs available", __FUNCTION__);
578 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
583 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
584 * Must be called with lu->cmd_orb_lock held.
586 static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
587 struct sbp2_command_info *cmd)
589 struct hpsb_host *host = lu->ud->ne->host;
592 if (cmd->dma_type == CMD_DMA_SINGLE)
593 dma_unmap_single(host->device.parent, cmd->cmd_dma,
594 cmd->dma_size, cmd->dma_dir);
595 else if (cmd->dma_type == CMD_DMA_PAGE)
596 dma_unmap_page(host->device.parent, cmd->cmd_dma,
597 cmd->dma_size, cmd->dma_dir);
598 /* XXX: Check for CMD_DMA_NONE bug */
599 cmd->dma_type = CMD_DMA_NONE;
602 if (cmd->sge_buffer) {
603 dma_unmap_sg(host->device.parent, cmd->sge_buffer,
604 cmd->dma_size, cmd->dma_dir);
605 cmd->sge_buffer = NULL;
607 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
611 * Is lu valid? Is the 1394 node still present?
613 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
615 return lu && lu->ne && !lu->ne->in_limbo;
618 /*********************************************
619 * IEEE-1394 core driver stack related section
620 *********************************************/
622 static int sbp2_probe(struct device *dev)
624 struct unit_directory *ud;
627 ud = container_of(dev, struct unit_directory, device);
629 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
631 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
634 lu = sbp2_alloc_device(ud);
638 sbp2_parse_unit_directory(lu, ud);
639 return sbp2_start_device(lu);
642 static int sbp2_remove(struct device *dev)
644 struct unit_directory *ud;
646 struct scsi_device *sdev;
648 ud = container_of(dev, struct unit_directory, device);
649 lu = ud->device.driver_data;
654 /* Get rid of enqueued commands if there is no chance to
656 if (!sbp2util_node_is_available(lu))
657 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
658 /* scsi_remove_device() may trigger shutdown functions of SCSI
659 * highlevel drivers which would deadlock if blocked. */
660 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
661 scsi_unblock_requests(lu->shost);
666 scsi_remove_device(sdev);
669 sbp2_logout_device(lu);
670 sbp2_remove_device(lu);
675 static int sbp2_update(struct unit_directory *ud)
677 struct sbp2_lu *lu = ud->device.driver_data;
679 if (sbp2_reconnect_device(lu)) {
680 /* Reconnect has failed. Perhaps we didn't reconnect fast
681 * enough. Try a regular login, but first log out just in
682 * case of any weirdness. */
683 sbp2_logout_device(lu);
685 if (sbp2_login_device(lu)) {
686 /* Login failed too, just fail, and the backend
687 * will call our sbp2_remove for us */
688 SBP2_ERR("Failed to reconnect to sbp2 device!");
693 sbp2_set_busy_timeout(lu);
694 sbp2_agent_reset(lu, 1);
695 sbp2_max_speed_and_size(lu);
697 /* Complete any pending commands with busy (so they get retried)
698 * and remove them from our queue. */
699 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
701 /* Accept new commands unless there was another bus reset in the
703 if (hpsb_node_entry_valid(lu->ne)) {
704 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
705 scsi_unblock_requests(lu->shost);
710 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
712 struct sbp2_fwhost_info *hi;
713 struct Scsi_Host *shost = NULL;
714 struct sbp2_lu *lu = NULL;
716 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
718 SBP2_ERR("failed to create lu");
724 lu->speed_code = IEEE1394_SPEED_100;
725 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
726 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
727 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
728 INIT_LIST_HEAD(&lu->cmd_orb_completed);
729 INIT_LIST_HEAD(&lu->lu_list);
730 spin_lock_init(&lu->cmd_orb_lock);
731 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
732 INIT_WORK(&lu->protocol_work, NULL);
734 ud->device.driver_data = lu;
736 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
738 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
741 SBP2_ERR("failed to allocate hostinfo");
744 hi->host = ud->ne->host;
745 INIT_LIST_HEAD(&hi->logical_units);
747 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
748 /* Handle data movement if physical dma is not
749 * enabled or not supported on host controller */
750 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
752 0x0ULL, 0xfffffffcULL)) {
753 SBP2_ERR("failed to register lower 4GB address range");
757 if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) {
758 SBP2_ERR("failed to set 4GB DMA mask");
764 /* Prevent unloading of the 1394 host */
765 if (!try_module_get(hi->host->driver->owner)) {
766 SBP2_ERR("failed to get a reference on 1394 host driver");
772 list_add_tail(&lu->lu_list, &hi->logical_units);
774 /* Register the status FIFO address range. We could use the same FIFO
775 * for targets at different nodes. However we need different FIFOs per
776 * target in order to support multi-unit devices.
777 * The FIFO is located out of the local host controller's physical range
778 * but, if possible, within the posted write area. Status writes will
779 * then be performed as unified transactions. This slightly reduces
780 * bandwidth usage, and some Prolific based devices seem to require it.
782 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
783 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
784 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
785 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
786 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
787 SBP2_ERR("failed to allocate status FIFO address range");
791 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
793 SBP2_ERR("failed to register scsi host");
797 shost->hostdata[0] = (unsigned long)lu;
799 if (!scsi_add_host(shost, &ud->device)) {
804 SBP2_ERR("failed to add scsi host");
805 scsi_host_put(shost);
808 sbp2_remove_device(lu);
812 static void sbp2_host_reset(struct hpsb_host *host)
814 struct sbp2_fwhost_info *hi;
817 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
820 list_for_each_entry(lu, &hi->logical_units, lu_list)
821 if (likely(atomic_read(&lu->state) !=
822 SBP2LU_STATE_IN_SHUTDOWN)) {
823 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
824 scsi_block_requests(lu->shost);
828 static int sbp2_start_device(struct sbp2_lu *lu)
830 struct sbp2_fwhost_info *hi = lu->hi;
833 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
834 sizeof(struct sbp2_login_response),
835 &lu->login_response_dma, GFP_KERNEL);
836 if (!lu->login_response)
839 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
840 sizeof(struct sbp2_query_logins_orb),
841 &lu->query_logins_orb_dma, GFP_KERNEL);
842 if (!lu->query_logins_orb)
845 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
846 sizeof(struct sbp2_query_logins_response),
847 &lu->query_logins_response_dma, GFP_KERNEL);
848 if (!lu->query_logins_response)
851 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
852 sizeof(struct sbp2_reconnect_orb),
853 &lu->reconnect_orb_dma, GFP_KERNEL);
854 if (!lu->reconnect_orb)
857 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
858 sizeof(struct sbp2_logout_orb),
859 &lu->logout_orb_dma, GFP_KERNEL);
863 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
864 sizeof(struct sbp2_login_orb),
865 &lu->login_orb_dma, GFP_KERNEL);
869 if (sbp2util_create_command_orb_pool(lu))
872 /* Wait a second before trying to log in. Previously logged in
873 * initiators need a chance to reconnect. */
874 if (msleep_interruptible(1000)) {
875 sbp2_remove_device(lu);
879 if (sbp2_login_device(lu)) {
880 sbp2_remove_device(lu);
884 sbp2_set_busy_timeout(lu);
885 sbp2_agent_reset(lu, 1);
886 sbp2_max_speed_and_size(lu);
888 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
890 SBP2_ERR("scsi_add_device failed");
891 sbp2_logout_device(lu);
892 sbp2_remove_device(lu);
899 SBP2_ERR("Could not allocate memory for lu");
900 sbp2_remove_device(lu);
904 static void sbp2_remove_device(struct sbp2_lu *lu)
906 struct sbp2_fwhost_info *hi;
914 scsi_remove_host(lu->shost);
915 scsi_host_put(lu->shost);
917 flush_scheduled_work();
918 sbp2util_remove_command_orb_pool(lu);
920 list_del(&lu->lu_list);
922 if (lu->login_response)
923 dma_free_coherent(hi->host->device.parent,
924 sizeof(struct sbp2_login_response),
926 lu->login_response_dma);
928 dma_free_coherent(hi->host->device.parent,
929 sizeof(struct sbp2_login_orb),
932 if (lu->reconnect_orb)
933 dma_free_coherent(hi->host->device.parent,
934 sizeof(struct sbp2_reconnect_orb),
936 lu->reconnect_orb_dma);
938 dma_free_coherent(hi->host->device.parent,
939 sizeof(struct sbp2_logout_orb),
942 if (lu->query_logins_orb)
943 dma_free_coherent(hi->host->device.parent,
944 sizeof(struct sbp2_query_logins_orb),
945 lu->query_logins_orb,
946 lu->query_logins_orb_dma);
947 if (lu->query_logins_response)
948 dma_free_coherent(hi->host->device.parent,
949 sizeof(struct sbp2_query_logins_response),
950 lu->query_logins_response,
951 lu->query_logins_response_dma);
953 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
954 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
955 lu->status_fifo_addr);
957 lu->ud->device.driver_data = NULL;
960 module_put(hi->host->driver->owner);
965 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
967 * Deal with write requests on adapters which do not support physical DMA or
968 * have it switched off.
970 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
971 int destid, quadlet_t *data, u64 addr,
972 size_t length, u16 flags)
974 memcpy(bus_to_virt((u32) addr), data, length);
975 return RCODE_COMPLETE;
979 * Deal with read requests on adapters which do not support physical DMA or
980 * have it switched off.
982 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
983 quadlet_t *data, u64 addr, size_t length,
986 memcpy(data, bus_to_virt((u32) addr), length);
987 return RCODE_COMPLETE;
991 /**************************************
992 * SBP-2 protocol related section
993 **************************************/
995 static int sbp2_query_logins(struct sbp2_lu *lu)
997 struct sbp2_fwhost_info *hi = lu->hi;
1002 lu->query_logins_orb->reserved1 = 0x0;
1003 lu->query_logins_orb->reserved2 = 0x0;
1005 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1006 lu->query_logins_orb->query_response_hi =
1007 ORB_SET_NODE_ID(hi->host->node_id);
1008 lu->query_logins_orb->lun_misc =
1009 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1010 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1011 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1013 lu->query_logins_orb->reserved_resp_length =
1014 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1015 sizeof(struct sbp2_query_logins_response));
1017 lu->query_logins_orb->status_fifo_hi =
1018 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1019 lu->query_logins_orb->status_fifo_lo =
1020 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1022 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1023 sizeof(struct sbp2_query_logins_orb));
1025 memset(lu->query_logins_response, 0,
1026 sizeof(struct sbp2_query_logins_response));
1028 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1029 data[1] = lu->query_logins_orb_dma;
1030 sbp2util_cpu_to_be32_buffer(data, 8);
1032 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1034 if (sbp2util_access_timeout(lu, 2*HZ)) {
1035 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1039 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1040 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1044 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1045 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1049 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1050 sizeof(struct sbp2_query_logins_response));
1052 max_logins = RESPONSE_GET_MAX_LOGINS(
1053 lu->query_logins_response->length_max_logins);
1054 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1056 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1057 lu->query_logins_response->length_max_logins);
1058 SBP2_INFO("Number of active logins: %d", active_logins);
1060 if (active_logins >= max_logins) {
1067 static int sbp2_login_device(struct sbp2_lu *lu)
1069 struct sbp2_fwhost_info *hi = lu->hi;
1075 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1076 SBP2_INFO("Device does not support any more concurrent logins");
1080 /* assume no password */
1081 lu->login_orb->password_hi = 0;
1082 lu->login_orb->password_lo = 0;
1084 lu->login_orb->login_response_lo = lu->login_response_dma;
1085 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1086 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1088 /* one second reconnect time */
1089 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1090 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1091 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1092 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1094 lu->login_orb->passwd_resp_lengths =
1095 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1097 lu->login_orb->status_fifo_hi =
1098 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1099 lu->login_orb->status_fifo_lo =
1100 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1102 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1103 sizeof(struct sbp2_login_orb));
1105 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1107 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1108 data[1] = lu->login_orb_dma;
1109 sbp2util_cpu_to_be32_buffer(data, 8);
1111 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1113 /* wait up to 20 seconds for login status */
1114 if (sbp2util_access_timeout(lu, 20*HZ)) {
1115 SBP2_ERR("Error logging into SBP-2 device - timed out");
1119 /* make sure that the returned status matches the login ORB */
1120 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1121 SBP2_ERR("Error logging into SBP-2 device - timed out");
1125 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1126 SBP2_ERR("Error logging into SBP-2 device - failed");
1130 sbp2util_cpu_to_be32_buffer(lu->login_response,
1131 sizeof(struct sbp2_login_response));
1132 lu->command_block_agent_addr =
1133 ((u64)lu->login_response->command_block_agent_hi) << 32;
1134 lu->command_block_agent_addr |=
1135 ((u64)lu->login_response->command_block_agent_lo);
1136 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1138 SBP2_INFO("Logged into SBP-2 device");
1142 static int sbp2_logout_device(struct sbp2_lu *lu)
1144 struct sbp2_fwhost_info *hi = lu->hi;
1148 lu->logout_orb->reserved1 = 0x0;
1149 lu->logout_orb->reserved2 = 0x0;
1150 lu->logout_orb->reserved3 = 0x0;
1151 lu->logout_orb->reserved4 = 0x0;
1153 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1154 lu->logout_orb->login_ID_misc |=
1155 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1156 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1158 lu->logout_orb->reserved5 = 0x0;
1159 lu->logout_orb->status_fifo_hi =
1160 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1161 lu->logout_orb->status_fifo_lo =
1162 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1164 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1165 sizeof(struct sbp2_logout_orb));
1167 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1168 data[1] = lu->logout_orb_dma;
1169 sbp2util_cpu_to_be32_buffer(data, 8);
1171 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1175 /* wait up to 1 second for the device to complete logout */
1176 if (sbp2util_access_timeout(lu, HZ))
1179 SBP2_INFO("Logged out of SBP-2 device");
1183 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1185 struct sbp2_fwhost_info *hi = lu->hi;
1189 lu->reconnect_orb->reserved1 = 0x0;
1190 lu->reconnect_orb->reserved2 = 0x0;
1191 lu->reconnect_orb->reserved3 = 0x0;
1192 lu->reconnect_orb->reserved4 = 0x0;
1194 lu->reconnect_orb->login_ID_misc =
1195 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1196 lu->reconnect_orb->login_ID_misc |=
1197 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1198 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1200 lu->reconnect_orb->reserved5 = 0x0;
1201 lu->reconnect_orb->status_fifo_hi =
1202 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1203 lu->reconnect_orb->status_fifo_lo =
1204 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1206 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1207 sizeof(struct sbp2_reconnect_orb));
1209 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1210 data[1] = lu->reconnect_orb_dma;
1211 sbp2util_cpu_to_be32_buffer(data, 8);
1213 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1217 /* wait up to 1 second for reconnect status */
1218 if (sbp2util_access_timeout(lu, HZ)) {
1219 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1223 /* make sure that the returned status matches the reconnect ORB */
1224 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1225 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1229 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1230 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1234 SBP2_INFO("Reconnected to SBP-2 device");
1239 * Set the target node's Single Phase Retry limit. Affects the target's retry
1240 * behaviour if our node is too busy to accept requests.
1242 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1246 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1247 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1248 SBP2_ERR("%s error", __FUNCTION__);
1252 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1253 struct unit_directory *ud)
1255 struct csr1212_keyval *kv;
1256 struct csr1212_dentry *dentry;
1257 u64 management_agent_addr;
1258 u32 unit_characteristics, firmware_revision;
1259 unsigned workarounds;
1262 management_agent_addr = 0;
1263 unit_characteristics = 0;
1264 firmware_revision = 0;
1266 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1267 switch (kv->key.id) {
1268 case CSR1212_KV_ID_DEPENDENT_INFO:
1269 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1270 management_agent_addr =
1271 CSR1212_REGISTER_SPACE_BASE +
1272 (kv->value.csr_offset << 2);
1274 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1275 lu->lun = ORB_SET_LUN(kv->value.immediate);
1278 case SBP2_UNIT_CHARACTERISTICS_KEY:
1279 /* FIXME: This is ignored so far.
1280 * See SBP-2 clause 7.4.8. */
1281 unit_characteristics = kv->value.immediate;
1284 case SBP2_FIRMWARE_REVISION_KEY:
1285 firmware_revision = kv->value.immediate;
1289 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1290 * Its "ordered" bit has consequences for command ORB
1291 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1296 workarounds = sbp2_default_workarounds;
1298 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1299 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1300 if (sbp2_workarounds_table[i].firmware_revision !=
1301 SBP2_ROM_VALUE_WILDCARD &&
1302 sbp2_workarounds_table[i].firmware_revision !=
1303 (firmware_revision & 0xffff00))
1305 if (sbp2_workarounds_table[i].model_id !=
1306 SBP2_ROM_VALUE_WILDCARD &&
1307 sbp2_workarounds_table[i].model_id != ud->model_id)
1309 workarounds |= sbp2_workarounds_table[i].workarounds;
1314 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1315 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1316 " model_id 0x%06x)",
1317 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1318 workarounds, firmware_revision,
1319 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1322 /* We would need one SCSI host template for each target to adjust
1323 * max_sectors on the fly, therefore warn only. */
1324 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1325 (sbp2_max_sectors * 512) > (128 * 1024))
1326 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1327 "max transfer size. WARNING: Current max_sectors "
1328 "setting is larger than 128KB (%d sectors)",
1329 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1332 /* If this is a logical unit directory entry, process the parent
1333 * to get the values. */
1334 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1335 struct unit_directory *parent_ud = container_of(
1336 ud->device.parent, struct unit_directory, device);
1337 sbp2_parse_unit_directory(lu, parent_ud);
1339 lu->management_agent_addr = management_agent_addr;
1340 lu->workarounds = workarounds;
1341 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1342 lu->lun = ORB_SET_LUN(ud->lun);
1346 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1349 * This function is called in order to determine the max speed and packet
1350 * size we can use in our ORBs. Note, that we (the driver and host) only
1351 * initiate the transaction. The SBP-2 device actually transfers the data
1352 * (by reading from the DMA area we tell it). This means that the SBP-2
1353 * device decides the actual maximum data it can transfer. We just tell it
1354 * the speed that it needs to use, and the max_rec the host supports, and
1355 * it takes care of the rest.
1357 static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
1359 struct sbp2_fwhost_info *hi = lu->hi;
1362 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
1364 if (lu->speed_code > sbp2_max_speed) {
1365 lu->speed_code = sbp2_max_speed;
1366 SBP2_INFO("Reducing speed to %s",
1367 hpsb_speedto_str[sbp2_max_speed]);
1370 /* Payload size is the lesser of what our speed supports and what
1371 * our host supports. */
1372 payload = min(sbp2_speedto_max_payload[lu->speed_code],
1373 (u8) (hi->host->csr.max_rec - 1));
1375 /* If physical DMA is off, work around limitation in ohci1394:
1376 * packet size must not exceed PAGE_SIZE */
1377 if (lu->ne->host->low_addr_space < (1ULL << 32))
1378 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1382 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1383 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1384 hpsb_speedto_str[lu->speed_code],
1385 SBP2_PAYLOAD_TO_BYTES(payload));
1387 lu->max_payload_size = payload;
1391 static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
1396 unsigned long flags;
1398 /* flush lu->protocol_work */
1400 flush_scheduled_work();
1402 data = ntohl(SBP2_AGENT_RESET_DATA);
1403 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1406 retval = hpsb_node_write(lu->ne, addr, &data, 4);
1408 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
1411 SBP2_ERR("hpsb_node_write failed.\n");
1415 /* make sure that the ORB_POINTER is written on next command */
1416 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1417 lu->last_orb = NULL;
1418 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1423 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1424 struct sbp2_fwhost_info *hi,
1425 struct sbp2_command_info *cmd,
1426 unsigned int scsi_use_sg,
1427 struct scatterlist *sgpnt,
1429 enum dma_data_direction dma_dir)
1431 cmd->dma_dir = dma_dir;
1432 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1433 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1435 /* special case if only one element (and less than 64KB in size) */
1436 if ((scsi_use_sg == 1) &&
1437 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1439 cmd->dma_size = sgpnt[0].length;
1440 cmd->dma_type = CMD_DMA_PAGE;
1441 cmd->cmd_dma = dma_map_page(hi->host->device.parent,
1442 sgpnt[0].page, sgpnt[0].offset,
1443 cmd->dma_size, cmd->dma_dir);
1445 orb->data_descriptor_lo = cmd->cmd_dma;
1446 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
1449 struct sbp2_unrestricted_page_table *sg_element =
1450 &cmd->scatter_gather_element[0];
1451 u32 sg_count, sg_len;
1453 int i, count = dma_map_sg(hi->host->device.parent, sgpnt,
1454 scsi_use_sg, dma_dir);
1456 cmd->dma_size = scsi_use_sg;
1457 cmd->sge_buffer = sgpnt;
1459 /* use page tables (s/g) */
1460 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1461 orb->data_descriptor_lo = cmd->sge_dma;
1463 /* loop through and fill out our SBP-2 page tables
1464 * (and split up anything too large) */
1465 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1466 sg_len = sg_dma_len(sgpnt);
1467 sg_addr = sg_dma_address(sgpnt);
1469 sg_element[sg_count].segment_base_lo = sg_addr;
1470 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1471 sg_element[sg_count].length_segment_base_hi =
1472 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1473 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1474 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1476 sg_element[sg_count].length_segment_base_hi =
1477 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1484 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1486 sbp2util_cpu_to_be32_buffer(sg_element,
1487 (sizeof(struct sbp2_unrestricted_page_table)) *
1492 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1493 struct sbp2_fwhost_info *hi,
1494 struct sbp2_command_info *cmd,
1495 struct scatterlist *sgpnt,
1497 unsigned int scsi_request_bufflen,
1498 void *scsi_request_buffer,
1499 enum dma_data_direction dma_dir)
1501 cmd->dma_dir = dma_dir;
1502 cmd->dma_size = scsi_request_bufflen;
1503 cmd->dma_type = CMD_DMA_SINGLE;
1504 cmd->cmd_dma = dma_map_single(hi->host->device.parent,
1505 scsi_request_buffer,
1506 cmd->dma_size, cmd->dma_dir);
1507 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1508 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1510 /* handle case where we get a command w/o s/g enabled
1511 * (but check for transfers larger than 64K) */
1512 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1514 orb->data_descriptor_lo = cmd->cmd_dma;
1515 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1518 /* The buffer is too large. Turn this into page tables. */
1520 struct sbp2_unrestricted_page_table *sg_element =
1521 &cmd->scatter_gather_element[0];
1522 u32 sg_count, sg_len;
1525 orb->data_descriptor_lo = cmd->sge_dma;
1526 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1528 /* fill out our SBP-2 page tables; split up the large buffer */
1530 sg_len = scsi_request_bufflen;
1531 sg_addr = cmd->cmd_dma;
1533 sg_element[sg_count].segment_base_lo = sg_addr;
1534 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1535 sg_element[sg_count].length_segment_base_hi =
1536 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1537 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1538 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1540 sg_element[sg_count].length_segment_base_hi =
1541 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1547 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1549 sbp2util_cpu_to_be32_buffer(sg_element,
1550 (sizeof(struct sbp2_unrestricted_page_table)) *
1555 static void sbp2_create_command_orb(struct sbp2_lu *lu,
1556 struct sbp2_command_info *cmd,
1558 unsigned int scsi_use_sg,
1559 unsigned int scsi_request_bufflen,
1560 void *scsi_request_buffer,
1561 enum dma_data_direction dma_dir)
1563 struct sbp2_fwhost_info *hi = lu->hi;
1564 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1565 struct sbp2_command_orb *orb = &cmd->command_orb;
1569 * Set-up our command ORB.
1571 * NOTE: We're doing unrestricted page tables (s/g), as this is
1572 * best performance (at least with the devices I have). This means
1573 * that data_size becomes the number of s/g elements, and
1574 * page_size should be zero (for unrestricted).
1576 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1577 orb->next_ORB_lo = 0x0;
1578 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1579 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1580 orb->misc |= ORB_SET_NOTIFY(1);
1582 if (dma_dir == DMA_NONE)
1583 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1584 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1585 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1586 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1587 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1589 SBP2_INFO("Falling back to DMA_NONE");
1590 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1593 /* set up our page table stuff */
1594 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1595 orb->data_descriptor_hi = 0x0;
1596 orb->data_descriptor_lo = 0x0;
1597 orb->misc |= ORB_SET_DIRECTION(1);
1598 } else if (scsi_use_sg)
1599 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
1600 orb_direction, dma_dir);
1602 sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
1603 scsi_request_bufflen,
1604 scsi_request_buffer, dma_dir);
1606 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1608 memset(orb->cdb, 0, 12);
1609 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1612 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1613 struct sbp2_command_info *cmd)
1615 struct sbp2_fwhost_info *hi = lu->hi;
1616 struct sbp2_command_orb *last_orb;
1617 dma_addr_t last_orb_dma;
1618 u64 addr = lu->command_block_agent_addr;
1621 unsigned long flags;
1623 dma_sync_single_for_device(hi->host->device.parent,
1624 cmd->command_orb_dma,
1625 sizeof(struct sbp2_command_orb),
1627 dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
1628 sizeof(cmd->scatter_gather_element),
1631 /* check to see if there are any previous orbs to use */
1632 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1633 last_orb = lu->last_orb;
1634 last_orb_dma = lu->last_orb_dma;
1637 * last_orb == NULL means: We know that the target's fetch agent
1638 * is not active right now.
1640 addr += SBP2_ORB_POINTER_OFFSET;
1641 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1642 data[1] = cmd->command_orb_dma;
1643 sbp2util_cpu_to_be32_buffer(data, 8);
1647 * last_orb != NULL means: We know that the target's fetch agent
1648 * is (very probably) not dead or in reset state right now.
1649 * We have an ORB already sent that we can append a new one to.
1650 * The target's fetch agent may or may not have read this
1653 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
1654 sizeof(struct sbp2_command_orb),
1656 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1658 /* Tells hardware that this pointer is valid */
1659 last_orb->next_ORB_hi = 0;
1660 dma_sync_single_for_device(hi->host->device.parent,
1662 sizeof(struct sbp2_command_orb),
1664 addr += SBP2_DOORBELL_OFFSET;
1668 lu->last_orb = &cmd->command_orb;
1669 lu->last_orb_dma = cmd->command_orb_dma;
1670 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1672 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1674 * sbp2util_node_write_no_wait failed. We certainly ran out
1675 * of transaction labels, perhaps just because there were no
1676 * context switches which gave khpsbpkt a chance to collect
1677 * free tlabels. Try again in non-atomic context. If necessary,
1678 * the workqueue job will sleep to guaranteedly get a tlabel.
1679 * We do not accept new commands until the job is over.
1681 scsi_block_requests(lu->shost);
1682 PREPARE_WORK(&lu->protocol_work,
1683 last_orb ? sbp2util_write_doorbell:
1684 sbp2util_write_orb_pointer);
1685 schedule_work(&lu->protocol_work);
1689 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1690 void (*done)(struct scsi_cmnd *))
1692 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
1693 unsigned int request_bufflen = SCpnt->request_bufflen;
1694 struct sbp2_command_info *cmd;
1696 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1700 sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
1701 request_bufflen, SCpnt->request_buffer,
1702 SCpnt->sc_data_direction);
1703 sbp2_link_orb_command(lu, cmd);
1709 * Translates SBP-2 status into SCSI sense data for check conditions
1711 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1714 /* OK, it's pretty ugly... ;-) */
1715 sense_data[0] = 0x70;
1716 sense_data[1] = 0x0;
1717 sense_data[2] = sbp2_status[9];
1718 sense_data[3] = sbp2_status[12];
1719 sense_data[4] = sbp2_status[13];
1720 sense_data[5] = sbp2_status[14];
1721 sense_data[6] = sbp2_status[15];
1723 sense_data[8] = sbp2_status[16];
1724 sense_data[9] = sbp2_status[17];
1725 sense_data[10] = sbp2_status[18];
1726 sense_data[11] = sbp2_status[19];
1727 sense_data[12] = sbp2_status[10];
1728 sense_data[13] = sbp2_status[11];
1729 sense_data[14] = sbp2_status[20];
1730 sense_data[15] = sbp2_status[21];
1732 return sbp2_status[8] & 0x3f;
1735 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1736 int destid, quadlet_t *data, u64 addr,
1737 size_t length, u16 fl)
1739 struct sbp2_fwhost_info *hi;
1740 struct sbp2_lu *lu = NULL, *lu_tmp;
1741 struct scsi_cmnd *SCpnt = NULL;
1742 struct sbp2_status_block *sb;
1743 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1744 struct sbp2_command_info *cmd;
1745 unsigned long flags;
1747 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1748 SBP2_ERR("Wrong size of status block");
1749 return RCODE_ADDRESS_ERROR;
1751 if (unlikely(!host)) {
1752 SBP2_ERR("host is NULL - this is bad!");
1753 return RCODE_ADDRESS_ERROR;
1755 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1756 if (unlikely(!hi)) {
1757 SBP2_ERR("host info is NULL - this is bad!");
1758 return RCODE_ADDRESS_ERROR;
1761 /* Find the unit which wrote the status. */
1762 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1763 if (lu_tmp->ne->nodeid == nodeid &&
1764 lu_tmp->status_fifo_addr == addr) {
1769 if (unlikely(!lu)) {
1770 SBP2_ERR("lu is NULL - device is gone?");
1771 return RCODE_ADDRESS_ERROR;
1774 /* Put response into lu status fifo buffer. The first two bytes
1775 * come in big endian bit order. Often the target writes only a
1776 * truncated status block, minimally the first two quadlets. The rest
1777 * is implied to be zeros. */
1778 sb = &lu->status_block;
1779 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1780 memcpy(sb, data, length);
1781 sbp2util_be32_to_cpu_buffer(sb, 8);
1783 /* Ignore unsolicited status. Handle command ORB status. */
1784 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1787 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1789 dma_sync_single_for_cpu(hi->host->device.parent,
1790 cmd->command_orb_dma,
1791 sizeof(struct sbp2_command_orb),
1793 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1794 sizeof(cmd->scatter_gather_element),
1796 /* Grab SCSI command pointers and check status. */
1798 * FIXME: If the src field in the status is 1, the ORB DMA must
1799 * not be reused until status for a subsequent ORB is received.
1801 SCpnt = cmd->Current_SCpnt;
1802 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1803 sbp2util_mark_command_completed(lu, cmd);
1804 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1807 u32 h = sb->ORB_offset_hi_misc;
1808 u32 r = STATUS_GET_RESP(h);
1810 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1811 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1812 r, STATUS_GET_SBP_STATUS(h));
1814 r == RESP_STATUS_TRANSPORT_FAILURE ?
1815 SBP2_SCSI_STATUS_BUSY :
1816 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1819 if (STATUS_GET_LEN(h) > 1)
1820 scsi_status = sbp2_status_to_sense_data(
1821 (unchar *)sb, SCpnt->sense_buffer);
1823 if (STATUS_TEST_DEAD(h))
1824 sbp2_agent_reset(lu, 0);
1827 /* Check here to see if there are no commands in-use. If there
1828 * are none, we know that the fetch agent left the active state
1829 * _and_ that we did not reactivate it yet. Therefore clear
1830 * last_orb so that next time we write directly to the
1831 * ORB_POINTER register. That way the fetch agent does not need
1832 * to refetch the next_ORB. */
1833 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1834 if (list_empty(&lu->cmd_orb_inuse))
1835 lu->last_orb = NULL;
1836 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1839 /* It's probably status after a management request. */
1840 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1841 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1842 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1843 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1844 lu->access_complete = 1;
1845 wake_up_interruptible(&sbp2_access_wq);
1850 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1852 return RCODE_COMPLETE;
1855 /**************************************
1856 * SCSI interface related section
1857 **************************************/
1859 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1860 void (*done)(struct scsi_cmnd *))
1862 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1863 struct sbp2_fwhost_info *hi;
1864 int result = DID_NO_CONNECT << 16;
1866 if (unlikely(!sbp2util_node_is_available(lu)))
1871 if (unlikely(!hi)) {
1872 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1876 /* Multiple units are currently represented to the SCSI core as separate
1877 * targets, not as one target with multiple LUs. Therefore return
1878 * selection time-out to any IO directed at non-zero LUNs. */
1879 if (unlikely(SCpnt->device->lun))
1882 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1883 SBP2_ERR("Bus reset in progress - rejecting command");
1884 result = DID_BUS_BUSY << 16;
1888 /* Bidirectional commands are not yet implemented,
1889 * and unknown transfer direction not handled. */
1890 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1891 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1892 result = DID_ERROR << 16;
1896 if (sbp2_send_command(lu, SCpnt, done)) {
1897 SBP2_ERR("Error sending SCSI command");
1898 sbp2scsi_complete_command(lu,
1899 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1905 SCpnt->result = result;
1910 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1912 struct sbp2_fwhost_info *hi = lu->hi;
1913 struct list_head *lh;
1914 struct sbp2_command_info *cmd;
1915 unsigned long flags;
1917 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1918 while (!list_empty(&lu->cmd_orb_inuse)) {
1919 lh = lu->cmd_orb_inuse.next;
1920 cmd = list_entry(lh, struct sbp2_command_info, list);
1921 dma_sync_single_for_cpu(hi->host->device.parent,
1922 cmd->command_orb_dma,
1923 sizeof(struct sbp2_command_orb),
1925 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
1926 sizeof(cmd->scatter_gather_element),
1928 sbp2util_mark_command_completed(lu, cmd);
1929 if (cmd->Current_SCpnt) {
1930 cmd->Current_SCpnt->result = status << 16;
1931 cmd->Current_done(cmd->Current_SCpnt);
1934 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1940 * Complete a regular SCSI command. Can be called in atomic context.
1942 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1943 struct scsi_cmnd *SCpnt,
1944 void (*done)(struct scsi_cmnd *))
1947 SBP2_ERR("SCpnt is NULL");
1951 switch (scsi_status) {
1952 case SBP2_SCSI_STATUS_GOOD:
1953 SCpnt->result = DID_OK << 16;
1956 case SBP2_SCSI_STATUS_BUSY:
1957 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1958 SCpnt->result = DID_BUS_BUSY << 16;
1961 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1962 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1965 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1966 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1967 SCpnt->result = DID_NO_CONNECT << 16;
1968 scsi_print_command(SCpnt);
1971 case SBP2_SCSI_STATUS_CONDITION_MET:
1972 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1973 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1974 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1975 SCpnt->result = DID_ERROR << 16;
1976 scsi_print_command(SCpnt);
1980 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1981 SCpnt->result = DID_ERROR << 16;
1984 /* If a bus reset is in progress and there was an error, complete
1985 * the command as busy so that it will get retried. */
1986 if (!hpsb_node_entry_valid(lu->ne)
1987 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1988 SBP2_ERR("Completing command with busy (bus reset)");
1989 SCpnt->result = DID_BUS_BUSY << 16;
1992 /* Tell the SCSI stack that we're done with this command. */
1996 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1998 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2001 sdev->allow_restart = 1;
2003 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2004 sdev->inquiry_len = 36;
2008 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2010 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2012 sdev->use_10_for_rw = 1;
2014 if (sdev->type == TYPE_ROM)
2015 sdev->use_10_for_ms = 1;
2016 if (sdev->type == TYPE_DISK &&
2017 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2018 sdev->skip_ms_page_8 = 1;
2019 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2020 sdev->fix_capacity = 1;
2024 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2026 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2031 * Called by scsi stack when something has really gone wrong.
2032 * Usually called when a command has timed-out for some reason.
2034 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2036 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2037 struct sbp2_fwhost_info *hi = lu->hi;
2038 struct sbp2_command_info *cmd;
2039 unsigned long flags;
2041 SBP2_INFO("aborting sbp2 command");
2042 scsi_print_command(SCpnt);
2044 if (sbp2util_node_is_available(lu)) {
2045 sbp2_agent_reset(lu, 1);
2047 /* Return a matching command structure to the free pool. */
2048 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2049 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2051 dma_sync_single_for_cpu(hi->host->device.parent,
2052 cmd->command_orb_dma,
2053 sizeof(struct sbp2_command_orb),
2055 dma_sync_single_for_cpu(hi->host->device.parent,
2057 sizeof(cmd->scatter_gather_element),
2059 sbp2util_mark_command_completed(lu, cmd);
2060 if (cmd->Current_SCpnt) {
2061 cmd->Current_SCpnt->result = DID_ABORT << 16;
2062 cmd->Current_done(cmd->Current_SCpnt);
2065 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2067 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2074 * Called by scsi stack when something has really gone wrong.
2076 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2078 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2080 SBP2_INFO("reset requested");
2082 if (sbp2util_node_is_available(lu)) {
2083 SBP2_INFO("generating sbp2 fetch agent reset");
2084 sbp2_agent_reset(lu, 1);
2090 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2091 struct device_attribute *attr,
2094 struct scsi_device *sdev;
2097 if (!(sdev = to_scsi_device(dev)))
2100 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2103 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
2104 lu->ud->id, ORB_SET_LUN(lu->lun));
2107 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2108 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2109 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2110 MODULE_LICENSE("GPL");
2112 static int sbp2_module_init(void)
2116 if (sbp2_serialize_io) {
2117 sbp2_shost_template.can_queue = 1;
2118 sbp2_shost_template.cmd_per_lun = 1;
2121 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2122 (sbp2_max_sectors * 512) > (128 * 1024))
2123 sbp2_max_sectors = 128 * 1024 / 512;
2124 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2126 hpsb_register_highlevel(&sbp2_highlevel);
2127 ret = hpsb_register_protocol(&sbp2_driver);
2129 SBP2_ERR("Failed to register protocol");
2130 hpsb_unregister_highlevel(&sbp2_highlevel);
2136 static void __exit sbp2_module_exit(void)
2138 hpsb_unregister_protocol(&sbp2_driver);
2139 hpsb_unregister_highlevel(&sbp2_highlevel);
2142 module_init(sbp2_module_init);
2143 module_exit(sbp2_module_exit);