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 storage devices as if they were SCSI
33 * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
41 #include <linux/blkdev.h>
42 #include <linux/compiler.h>
43 #include <linux/delay.h>
44 #include <linux/device.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/gfp.h>
47 #include <linux/init.h>
48 #include <linux/kernel.h>
49 #include <linux/list.h>
50 #include <linux/module.h>
51 #include <linux/moduleparam.h>
52 #include <linux/pci.h>
53 #include <linux/slab.h>
54 #include <linux/spinlock.h>
55 #include <linux/stat.h>
56 #include <linux/string.h>
57 #include <linux/stringify.h>
58 #include <linux/types.h>
59 #include <linux/wait.h>
61 #include <asm/byteorder.h>
62 #include <asm/errno.h>
63 #include <asm/param.h>
64 #include <asm/scatterlist.h>
65 #include <asm/system.h>
66 #include <asm/types.h>
68 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
69 #include <asm/io.h> /* for bus_to_virt */
72 #include <scsi/scsi.h>
73 #include <scsi/scsi_cmnd.h>
74 #include <scsi/scsi_dbg.h>
75 #include <scsi/scsi_device.h>
76 #include <scsi/scsi_host.h>
79 #include "highlevel.h"
82 #include "ieee1394_core.h"
83 #include "ieee1394_hotplug.h"
84 #include "ieee1394_transactions.h"
85 #include "ieee1394_types.h"
90 * Module load parameter definitions
94 * Change max_speed on module load if you have a bad IEEE-1394
95 * controller that has trouble running 2KB packets at 400mb.
97 * NOTE: On certain OHCI parts I have seen short packets on async transmit
98 * (probably due to PCI latency/throughput issues with the part). You can
99 * bump down the speed if you are running into problems.
101 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
102 module_param_named(max_speed, sbp2_max_speed, int, 0644);
103 MODULE_PARM_DESC(max_speed, "Force max speed "
104 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
107 * Set serialize_io to 1 if you'd like only one scsi command sent
108 * down to us at a time (debugging). This might be necessary for very
109 * badly behaved sbp2 devices.
111 * TODO: Make this configurable per device.
113 static int sbp2_serialize_io = 1;
114 module_param_named(serialize_io, sbp2_serialize_io, int, 0444);
115 MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers "
116 "(default = 1, faster = 0)");
119 * Bump up max_sectors if you'd like to support very large sized
120 * transfers. Please note that some older sbp2 bridge chips are broken for
121 * transfers greater or equal to 128KB. Default is a value of 255
122 * sectors, or just under 128KB (at 512 byte sector size). I can note that
123 * the Oxsemi sbp2 chipsets have no problems supporting very large
126 static int sbp2_max_sectors = SBP2_MAX_SECTORS;
127 module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
128 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
129 "(default = " __stringify(SBP2_MAX_SECTORS) ")");
132 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
133 * do an exclusive login, as it's generally unsafe to have two hosts
134 * talking to a single sbp2 device at the same time (filesystem coherency,
135 * etc.). If you're running an sbp2 device that supports multiple logins,
136 * and you're either running read-only filesystems or some sort of special
137 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
138 * File System, or Lustre, then set exclusive_login to zero.
140 * So far only bridges from Oxford Semiconductor are known to support
141 * concurrent logins. Depending on firmware, four or two concurrent logins
142 * are possible on OXFW911 and newer Oxsemi bridges.
144 static int sbp2_exclusive_login = 1;
145 module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644);
146 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
150 * If any of the following workarounds is required for your device to work,
151 * please submit the kernel messages logged by sbp2 to the linux1394-devel
154 * - 128kB max transfer
155 * Limit transfer size. Necessary for some old bridges.
158 * When scsi_mod probes the device, let the inquiry command look like that
162 * Suppress sending of mode_sense for mode page 8 if the device pretends to
163 * support the SCSI Primary Block commands instead of Reduced Block Commands.
166 * Tell sd_mod to correct the last sector number reported by read_capacity.
167 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
168 * Don't use this with devices which don't have this bug.
170 * - override internal blacklist
171 * Instead of adding to the built-in blacklist, use only the workarounds
172 * specified in the module load parameter.
173 * Useful if a blacklist entry interfered with a non-broken device.
175 static int sbp2_default_workarounds;
176 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
177 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
178 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
179 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
180 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
181 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
182 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
183 ", or a combination)");
186 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
187 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
192 static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
193 static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
194 void (*)(struct scsi_cmnd *));
195 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
196 static int sbp2_start_device(struct sbp2_lu *);
197 static void sbp2_remove_device(struct sbp2_lu *);
198 static int sbp2_login_device(struct sbp2_lu *);
199 static int sbp2_reconnect_device(struct sbp2_lu *);
200 static int sbp2_logout_device(struct sbp2_lu *);
201 static void sbp2_host_reset(struct hpsb_host *);
202 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
204 static int sbp2_agent_reset(struct sbp2_lu *, int);
205 static void sbp2_parse_unit_directory(struct sbp2_lu *,
206 struct unit_directory *);
207 static int sbp2_set_busy_timeout(struct sbp2_lu *);
208 static int sbp2_max_speed_and_size(struct sbp2_lu *);
211 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
213 static struct hpsb_highlevel sbp2_highlevel = {
214 .name = SBP2_DEVICE_NAME,
215 .host_reset = sbp2_host_reset,
218 static struct hpsb_address_ops sbp2_ops = {
219 .write = sbp2_handle_status_write
222 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
223 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
225 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
228 static struct hpsb_address_ops sbp2_physdma_ops = {
229 .read = sbp2_handle_physdma_read,
230 .write = sbp2_handle_physdma_write,
236 * Interface to driver core and IEEE 1394 core
238 static struct ieee1394_device_id sbp2_id_table[] = {
240 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
241 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
242 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
245 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
247 static int sbp2_probe(struct device *);
248 static int sbp2_remove(struct device *);
249 static int sbp2_update(struct unit_directory *);
251 static struct hpsb_protocol_driver sbp2_driver = {
252 .name = "SBP2 Driver",
253 .id_table = sbp2_id_table,
254 .update = sbp2_update,
256 .name = SBP2_DEVICE_NAME,
257 .bus = &ieee1394_bus_type,
259 .remove = sbp2_remove,
265 * Interface to SCSI core
267 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
268 void (*)(struct scsi_cmnd *));
269 static int sbp2scsi_abort(struct scsi_cmnd *);
270 static int sbp2scsi_reset(struct scsi_cmnd *);
271 static int sbp2scsi_slave_alloc(struct scsi_device *);
272 static int sbp2scsi_slave_configure(struct scsi_device *);
273 static void sbp2scsi_slave_destroy(struct scsi_device *);
274 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
275 struct device_attribute *, char *);
277 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
279 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
280 &dev_attr_ieee1394_id,
284 static struct scsi_host_template sbp2_shost_template = {
285 .module = THIS_MODULE,
286 .name = "SBP-2 IEEE-1394",
287 .proc_name = SBP2_DEVICE_NAME,
288 .queuecommand = sbp2scsi_queuecommand,
289 .eh_abort_handler = sbp2scsi_abort,
290 .eh_device_reset_handler = sbp2scsi_reset,
291 .slave_alloc = sbp2scsi_slave_alloc,
292 .slave_configure = sbp2scsi_slave_configure,
293 .slave_destroy = sbp2scsi_slave_destroy,
295 .sg_tablesize = SG_ALL,
296 .use_clustering = ENABLE_CLUSTERING,
297 .cmd_per_lun = SBP2_MAX_CMDS,
298 .can_queue = SBP2_MAX_CMDS,
300 .sdev_attrs = sbp2_sysfs_sdev_attrs,
305 * List of devices with known bugs.
307 * The firmware_revision field, masked with 0xffff00, is the best indicator
308 * for the type of bridge chip of a device. It yields a few false positives
309 * but this did not break correctly behaving devices so far.
311 static const struct {
312 u32 firmware_revision;
314 unsigned workarounds;
315 } sbp2_workarounds_table[] = {
316 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
317 .firmware_revision = 0x002800,
318 .model_id = 0x001010,
319 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
320 SBP2_WORKAROUND_MODE_SENSE_8,
322 /* Initio bridges, actually only needed for some older ones */ {
323 .firmware_revision = 0x000200,
324 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
326 /* Symbios bridge */ {
327 .firmware_revision = 0xa0b800,
328 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
331 * Note about the following Apple iPod blacklist entries:
333 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
334 * matching logic treats 0 as a wildcard, we cannot match this ID
335 * without rewriting the matching routine. Fortunately these iPods
336 * do not feature the read_capacity bug according to one report.
337 * Read_capacity behaviour as well as model_id could change due to
338 * Apple-supplied firmware updates though.
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)
455 data[0] = ORB_SET_NODE_ID((container_of(work, struct sbp2_lu, protocol_work))->hi->host->node_id);
456 data[1] = (container_of(work, struct sbp2_lu, protocol_work))->last_orb_dma;
457 sbp2util_cpu_to_be32_buffer(data, 8);
458 sbp2util_notify_fetch_agent(container_of(work, struct sbp2_lu, protocol_work), SBP2_ORB_POINTER_OFFSET, data, 8);
461 static void sbp2util_write_doorbell(struct work_struct *work)
463 sbp2util_notify_fetch_agent(container_of(work, struct sbp2_lu, protocol_work), SBP2_DOORBELL_OFFSET, NULL, 4);
466 static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
468 struct sbp2_fwhost_info *hi = lu->hi;
470 unsigned long flags, orbs;
471 struct sbp2_command_info *cmd;
473 orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
475 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
476 for (i = 0; i < orbs; i++) {
477 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
479 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
482 cmd->command_orb_dma = pci_map_single(hi->host->pdev,
484 sizeof(struct sbp2_command_orb),
486 cmd->sge_dma = pci_map_single(hi->host->pdev,
487 &cmd->scatter_gather_element,
488 sizeof(cmd->scatter_gather_element),
489 PCI_DMA_BIDIRECTIONAL);
490 INIT_LIST_HEAD(&cmd->list);
491 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
493 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
497 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
499 struct hpsb_host *host = lu->hi->host;
500 struct list_head *lh, *next;
501 struct sbp2_command_info *cmd;
504 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
505 if (!list_empty(&lu->cmd_orb_completed))
506 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
507 cmd = list_entry(lh, struct sbp2_command_info, list);
508 pci_unmap_single(host->pdev, cmd->command_orb_dma,
509 sizeof(struct sbp2_command_orb),
511 pci_unmap_single(host->pdev, cmd->sge_dma,
512 sizeof(cmd->scatter_gather_element),
513 PCI_DMA_BIDIRECTIONAL);
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);
582 static void sbp2util_free_command_dma(struct sbp2_command_info *cmd)
584 struct sbp2_lu *lu = (struct sbp2_lu *)
585 cmd->Current_SCpnt->device->host->hostdata[0];
586 struct hpsb_host *host;
589 SBP2_ERR("%s: lu == NULL", __FUNCTION__);
593 host = lu->ud->ne->host;
596 if (cmd->dma_type == CMD_DMA_SINGLE)
597 pci_unmap_single(host->pdev, cmd->cmd_dma,
598 cmd->dma_size, cmd->dma_dir);
599 else if (cmd->dma_type == CMD_DMA_PAGE)
600 pci_unmap_page(host->pdev, 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;
607 if (cmd->sge_buffer) {
608 pci_unmap_sg(host->pdev, cmd->sge_buffer,
609 cmd->dma_size, cmd->dma_dir);
610 cmd->sge_buffer = NULL;
615 * This function moves a command to the completed orb list.
616 * Must be called with lu->cmd_orb_lock held.
618 static void sbp2util_mark_command_completed(
620 struct sbp2_command_info *cmd)
622 list_del(&cmd->list);
623 sbp2util_free_command_dma(cmd);
624 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
628 * Is lu valid? Is the 1394 node still present?
630 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
632 return lu && lu->ne && !lu->ne->in_limbo;
635 /*********************************************
636 * IEEE-1394 core driver stack related section
637 *********************************************/
639 static int sbp2_probe(struct device *dev)
641 struct unit_directory *ud;
644 ud = container_of(dev, struct unit_directory, device);
646 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
648 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
651 lu = sbp2_alloc_device(ud);
655 sbp2_parse_unit_directory(lu, ud);
656 return sbp2_start_device(lu);
659 static int sbp2_remove(struct device *dev)
661 struct unit_directory *ud;
663 struct scsi_device *sdev;
665 ud = container_of(dev, struct unit_directory, device);
666 lu = ud->device.driver_data;
671 /* Get rid of enqueued commands if there is no chance to
673 if (!sbp2util_node_is_available(lu))
674 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
675 /* scsi_remove_device() may trigger shutdown functions of SCSI
676 * highlevel drivers which would deadlock if blocked. */
677 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
678 scsi_unblock_requests(lu->shost);
683 scsi_remove_device(sdev);
686 sbp2_logout_device(lu);
687 sbp2_remove_device(lu);
692 static int sbp2_update(struct unit_directory *ud)
694 struct sbp2_lu *lu = ud->device.driver_data;
696 if (sbp2_reconnect_device(lu)) {
697 /* Reconnect has failed. Perhaps we didn't reconnect fast
698 * enough. Try a regular login, but first log out just in
699 * case of any weirdness. */
700 sbp2_logout_device(lu);
702 if (sbp2_login_device(lu)) {
703 /* Login failed too, just fail, and the backend
704 * will call our sbp2_remove for us */
705 SBP2_ERR("Failed to reconnect to sbp2 device!");
710 sbp2_set_busy_timeout(lu);
711 sbp2_agent_reset(lu, 1);
712 sbp2_max_speed_and_size(lu);
714 /* Complete any pending commands with busy (so they get retried)
715 * and remove them from our queue. */
716 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
718 /* Accept new commands unless there was another bus reset in the
720 if (hpsb_node_entry_valid(lu->ne)) {
721 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
722 scsi_unblock_requests(lu->shost);
727 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
729 struct sbp2_fwhost_info *hi;
730 struct Scsi_Host *shost = NULL;
731 struct sbp2_lu *lu = NULL;
733 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
735 SBP2_ERR("failed to create lu");
741 lu->speed_code = IEEE1394_SPEED_100;
742 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
743 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
744 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
745 INIT_LIST_HEAD(&lu->cmd_orb_completed);
746 INIT_LIST_HEAD(&lu->lu_list);
747 spin_lock_init(&lu->cmd_orb_lock);
748 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
749 INIT_WORK(&lu->protocol_work, NULL);
751 ud->device.driver_data = lu;
753 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
755 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
758 SBP2_ERR("failed to allocate hostinfo");
761 hi->host = ud->ne->host;
762 INIT_LIST_HEAD(&hi->logical_units);
764 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
765 /* Handle data movement if physical dma is not
766 * enabled or not supported on host controller */
767 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
769 0x0ULL, 0xfffffffcULL)) {
770 SBP2_ERR("failed to register lower 4GB address range");
776 /* Prevent unloading of the 1394 host */
777 if (!try_module_get(hi->host->driver->owner)) {
778 SBP2_ERR("failed to get a reference on 1394 host driver");
784 list_add_tail(&lu->lu_list, &hi->logical_units);
786 /* Register the status FIFO address range. We could use the same FIFO
787 * for targets at different nodes. However we need different FIFOs per
788 * target in order to support multi-unit devices.
789 * The FIFO is located out of the local host controller's physical range
790 * but, if possible, within the posted write area. Status writes will
791 * then be performed as unified transactions. This slightly reduces
792 * bandwidth usage, and some Prolific based devices seem to require it.
794 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
795 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
796 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
797 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
798 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
799 SBP2_ERR("failed to allocate status FIFO address range");
803 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
805 SBP2_ERR("failed to register scsi host");
809 shost->hostdata[0] = (unsigned long)lu;
811 if (!scsi_add_host(shost, &ud->device)) {
816 SBP2_ERR("failed to add scsi host");
817 scsi_host_put(shost);
820 sbp2_remove_device(lu);
824 static void sbp2_host_reset(struct hpsb_host *host)
826 struct sbp2_fwhost_info *hi;
829 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
832 list_for_each_entry(lu, &hi->logical_units, lu_list)
833 if (likely(atomic_read(&lu->state) !=
834 SBP2LU_STATE_IN_SHUTDOWN)) {
835 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
836 scsi_block_requests(lu->shost);
840 static int sbp2_start_device(struct sbp2_lu *lu)
842 struct sbp2_fwhost_info *hi = lu->hi;
845 lu->login_response = pci_alloc_consistent(hi->host->pdev,
846 sizeof(struct sbp2_login_response),
847 &lu->login_response_dma);
848 if (!lu->login_response)
851 lu->query_logins_orb = pci_alloc_consistent(hi->host->pdev,
852 sizeof(struct sbp2_query_logins_orb),
853 &lu->query_logins_orb_dma);
854 if (!lu->query_logins_orb)
857 lu->query_logins_response = pci_alloc_consistent(hi->host->pdev,
858 sizeof(struct sbp2_query_logins_response),
859 &lu->query_logins_response_dma);
860 if (!lu->query_logins_response)
863 lu->reconnect_orb = pci_alloc_consistent(hi->host->pdev,
864 sizeof(struct sbp2_reconnect_orb),
865 &lu->reconnect_orb_dma);
866 if (!lu->reconnect_orb)
869 lu->logout_orb = pci_alloc_consistent(hi->host->pdev,
870 sizeof(struct sbp2_logout_orb),
871 &lu->logout_orb_dma);
875 lu->login_orb = pci_alloc_consistent(hi->host->pdev,
876 sizeof(struct sbp2_login_orb),
881 if (sbp2util_create_command_orb_pool(lu)) {
882 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
883 sbp2_remove_device(lu);
887 /* Wait a second before trying to log in. Previously logged in
888 * initiators need a chance to reconnect. */
889 if (msleep_interruptible(1000)) {
890 sbp2_remove_device(lu);
894 if (sbp2_login_device(lu)) {
895 sbp2_remove_device(lu);
899 sbp2_set_busy_timeout(lu);
900 sbp2_agent_reset(lu, 1);
901 sbp2_max_speed_and_size(lu);
903 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
905 SBP2_ERR("scsi_add_device failed");
906 sbp2_logout_device(lu);
907 sbp2_remove_device(lu);
914 SBP2_ERR("Could not allocate memory for lu");
915 sbp2_remove_device(lu);
919 static void sbp2_remove_device(struct sbp2_lu *lu)
921 struct sbp2_fwhost_info *hi;
929 scsi_remove_host(lu->shost);
930 scsi_host_put(lu->shost);
932 flush_scheduled_work();
933 sbp2util_remove_command_orb_pool(lu);
935 list_del(&lu->lu_list);
937 if (lu->login_response)
938 pci_free_consistent(hi->host->pdev,
939 sizeof(struct sbp2_login_response),
941 lu->login_response_dma);
943 pci_free_consistent(hi->host->pdev,
944 sizeof(struct sbp2_login_orb),
947 if (lu->reconnect_orb)
948 pci_free_consistent(hi->host->pdev,
949 sizeof(struct sbp2_reconnect_orb),
951 lu->reconnect_orb_dma);
953 pci_free_consistent(hi->host->pdev,
954 sizeof(struct sbp2_logout_orb),
957 if (lu->query_logins_orb)
958 pci_free_consistent(hi->host->pdev,
959 sizeof(struct sbp2_query_logins_orb),
960 lu->query_logins_orb,
961 lu->query_logins_orb_dma);
962 if (lu->query_logins_response)
963 pci_free_consistent(hi->host->pdev,
964 sizeof(struct sbp2_query_logins_response),
965 lu->query_logins_response,
966 lu->query_logins_response_dma);
968 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
969 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
970 lu->status_fifo_addr);
972 lu->ud->device.driver_data = NULL;
975 module_put(hi->host->driver->owner);
980 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
982 * Deal with write requests on adapters which do not support physical DMA or
983 * have it switched off.
985 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
986 int destid, quadlet_t *data, u64 addr,
987 size_t length, u16 flags)
989 memcpy(bus_to_virt((u32) addr), data, length);
990 return RCODE_COMPLETE;
994 * Deal with read requests on adapters which do not support physical DMA or
995 * have it switched off.
997 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
998 quadlet_t *data, u64 addr, size_t length,
1001 memcpy(data, bus_to_virt((u32) addr), length);
1002 return RCODE_COMPLETE;
1006 /**************************************
1007 * SBP-2 protocol related section
1008 **************************************/
1010 static int sbp2_query_logins(struct sbp2_lu *lu)
1012 struct sbp2_fwhost_info *hi = lu->hi;
1017 lu->query_logins_orb->reserved1 = 0x0;
1018 lu->query_logins_orb->reserved2 = 0x0;
1020 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1021 lu->query_logins_orb->query_response_hi =
1022 ORB_SET_NODE_ID(hi->host->node_id);
1023 lu->query_logins_orb->lun_misc =
1024 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1025 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1026 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1028 lu->query_logins_orb->reserved_resp_length =
1029 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1030 sizeof(struct sbp2_query_logins_response));
1032 lu->query_logins_orb->status_fifo_hi =
1033 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1034 lu->query_logins_orb->status_fifo_lo =
1035 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1037 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1038 sizeof(struct sbp2_query_logins_orb));
1040 memset(lu->query_logins_response, 0,
1041 sizeof(struct sbp2_query_logins_response));
1043 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1044 data[1] = lu->query_logins_orb_dma;
1045 sbp2util_cpu_to_be32_buffer(data, 8);
1047 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1049 if (sbp2util_access_timeout(lu, 2*HZ)) {
1050 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1054 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1055 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1059 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1060 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1064 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1065 sizeof(struct sbp2_query_logins_response));
1067 max_logins = RESPONSE_GET_MAX_LOGINS(
1068 lu->query_logins_response->length_max_logins);
1069 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1071 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1072 lu->query_logins_response->length_max_logins);
1073 SBP2_INFO("Number of active logins: %d", active_logins);
1075 if (active_logins >= max_logins) {
1082 static int sbp2_login_device(struct sbp2_lu *lu)
1084 struct sbp2_fwhost_info *hi = lu->hi;
1090 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1091 SBP2_INFO("Device does not support any more concurrent logins");
1095 /* assume no password */
1096 lu->login_orb->password_hi = 0;
1097 lu->login_orb->password_lo = 0;
1099 lu->login_orb->login_response_lo = lu->login_response_dma;
1100 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1101 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1103 /* one second reconnect time */
1104 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1105 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1106 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1107 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1109 lu->login_orb->passwd_resp_lengths =
1110 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1112 lu->login_orb->status_fifo_hi =
1113 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1114 lu->login_orb->status_fifo_lo =
1115 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1117 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1118 sizeof(struct sbp2_login_orb));
1120 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1122 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1123 data[1] = lu->login_orb_dma;
1124 sbp2util_cpu_to_be32_buffer(data, 8);
1126 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1128 /* wait up to 20 seconds for login status */
1129 if (sbp2util_access_timeout(lu, 20*HZ)) {
1130 SBP2_ERR("Error logging into SBP-2 device - timed out");
1134 /* make sure that the returned status matches the login ORB */
1135 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1136 SBP2_ERR("Error logging into SBP-2 device - timed out");
1140 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1141 SBP2_ERR("Error logging into SBP-2 device - failed");
1145 sbp2util_cpu_to_be32_buffer(lu->login_response,
1146 sizeof(struct sbp2_login_response));
1147 lu->command_block_agent_addr =
1148 ((u64)lu->login_response->command_block_agent_hi) << 32;
1149 lu->command_block_agent_addr |=
1150 ((u64)lu->login_response->command_block_agent_lo);
1151 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1153 SBP2_INFO("Logged into SBP-2 device");
1157 static int sbp2_logout_device(struct sbp2_lu *lu)
1159 struct sbp2_fwhost_info *hi = lu->hi;
1163 lu->logout_orb->reserved1 = 0x0;
1164 lu->logout_orb->reserved2 = 0x0;
1165 lu->logout_orb->reserved3 = 0x0;
1166 lu->logout_orb->reserved4 = 0x0;
1168 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1169 lu->logout_orb->login_ID_misc |=
1170 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1171 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1173 lu->logout_orb->reserved5 = 0x0;
1174 lu->logout_orb->status_fifo_hi =
1175 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1176 lu->logout_orb->status_fifo_lo =
1177 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1179 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1180 sizeof(struct sbp2_logout_orb));
1182 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1183 data[1] = lu->logout_orb_dma;
1184 sbp2util_cpu_to_be32_buffer(data, 8);
1186 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1190 /* wait up to 1 second for the device to complete logout */
1191 if (sbp2util_access_timeout(lu, HZ))
1194 SBP2_INFO("Logged out of SBP-2 device");
1198 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1200 struct sbp2_fwhost_info *hi = lu->hi;
1204 lu->reconnect_orb->reserved1 = 0x0;
1205 lu->reconnect_orb->reserved2 = 0x0;
1206 lu->reconnect_orb->reserved3 = 0x0;
1207 lu->reconnect_orb->reserved4 = 0x0;
1209 lu->reconnect_orb->login_ID_misc =
1210 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1211 lu->reconnect_orb->login_ID_misc |=
1212 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1213 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1215 lu->reconnect_orb->reserved5 = 0x0;
1216 lu->reconnect_orb->status_fifo_hi =
1217 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1218 lu->reconnect_orb->status_fifo_lo =
1219 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1221 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1222 sizeof(struct sbp2_reconnect_orb));
1224 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1225 data[1] = lu->reconnect_orb_dma;
1226 sbp2util_cpu_to_be32_buffer(data, 8);
1228 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1232 /* wait up to 1 second for reconnect status */
1233 if (sbp2util_access_timeout(lu, HZ)) {
1234 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1238 /* make sure that the returned status matches the reconnect ORB */
1239 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1240 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1244 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1245 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1249 SBP2_INFO("Reconnected to SBP-2 device");
1254 * Set the target node's Single Phase Retry limit. Affects the target's retry
1255 * behaviour if our node is too busy to accept requests.
1257 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1261 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1262 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1263 SBP2_ERR("%s error", __FUNCTION__);
1267 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1268 struct unit_directory *ud)
1270 struct csr1212_keyval *kv;
1271 struct csr1212_dentry *dentry;
1272 u64 management_agent_addr;
1273 u32 unit_characteristics, firmware_revision;
1274 unsigned workarounds;
1277 management_agent_addr = 0;
1278 unit_characteristics = 0;
1279 firmware_revision = 0;
1281 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1282 switch (kv->key.id) {
1283 case CSR1212_KV_ID_DEPENDENT_INFO:
1284 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1285 management_agent_addr =
1286 CSR1212_REGISTER_SPACE_BASE +
1287 (kv->value.csr_offset << 2);
1289 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1290 lu->lun = ORB_SET_LUN(kv->value.immediate);
1293 case SBP2_UNIT_CHARACTERISTICS_KEY:
1294 /* FIXME: This is ignored so far.
1295 * See SBP-2 clause 7.4.8. */
1296 unit_characteristics = kv->value.immediate;
1299 case SBP2_FIRMWARE_REVISION_KEY:
1300 firmware_revision = kv->value.immediate;
1304 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1305 * Its "ordered" bit has consequences for command ORB
1306 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1311 workarounds = sbp2_default_workarounds;
1313 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1314 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1315 if (sbp2_workarounds_table[i].firmware_revision &&
1316 sbp2_workarounds_table[i].firmware_revision !=
1317 (firmware_revision & 0xffff00))
1319 if (sbp2_workarounds_table[i].model_id &&
1320 sbp2_workarounds_table[i].model_id != ud->model_id)
1322 workarounds |= sbp2_workarounds_table[i].workarounds;
1327 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1328 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1329 " model_id 0x%06x)",
1330 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1331 workarounds, firmware_revision,
1332 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1335 /* We would need one SCSI host template for each target to adjust
1336 * max_sectors on the fly, therefore warn only. */
1337 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1338 (sbp2_max_sectors * 512) > (128 * 1024))
1339 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1340 "max transfer size. WARNING: Current max_sectors "
1341 "setting is larger than 128KB (%d sectors)",
1342 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1345 /* If this is a logical unit directory entry, process the parent
1346 * to get the values. */
1347 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1348 struct unit_directory *parent_ud = container_of(
1349 ud->device.parent, struct unit_directory, device);
1350 sbp2_parse_unit_directory(lu, parent_ud);
1352 lu->management_agent_addr = management_agent_addr;
1353 lu->workarounds = workarounds;
1354 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1355 lu->lun = ORB_SET_LUN(ud->lun);
1359 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1362 * This function is called in order to determine the max speed and packet
1363 * size we can use in our ORBs. Note, that we (the driver and host) only
1364 * initiate the transaction. The SBP-2 device actually transfers the data
1365 * (by reading from the DMA area we tell it). This means that the SBP-2
1366 * device decides the actual maximum data it can transfer. We just tell it
1367 * the speed that it needs to use, and the max_rec the host supports, and
1368 * it takes care of the rest.
1370 static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
1372 struct sbp2_fwhost_info *hi = lu->hi;
1375 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
1377 if (lu->speed_code > sbp2_max_speed) {
1378 lu->speed_code = sbp2_max_speed;
1379 SBP2_INFO("Reducing speed to %s",
1380 hpsb_speedto_str[sbp2_max_speed]);
1383 /* Payload size is the lesser of what our speed supports and what
1384 * our host supports. */
1385 payload = min(sbp2_speedto_max_payload[lu->speed_code],
1386 (u8) (hi->host->csr.max_rec - 1));
1388 /* If physical DMA is off, work around limitation in ohci1394:
1389 * packet size must not exceed PAGE_SIZE */
1390 if (lu->ne->host->low_addr_space < (1ULL << 32))
1391 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1395 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1396 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1397 hpsb_speedto_str[lu->speed_code],
1398 SBP2_PAYLOAD_TO_BYTES(payload));
1400 lu->max_payload_size = payload;
1404 static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
1409 unsigned long flags;
1411 /* cancel_delayed_work(&lu->protocol_work); */
1413 flush_scheduled_work();
1415 data = ntohl(SBP2_AGENT_RESET_DATA);
1416 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1419 retval = hpsb_node_write(lu->ne, addr, &data, 4);
1421 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
1424 SBP2_ERR("hpsb_node_write failed.\n");
1428 /* make sure that the ORB_POINTER is written on next command */
1429 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1430 lu->last_orb = NULL;
1431 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1436 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1437 struct sbp2_fwhost_info *hi,
1438 struct sbp2_command_info *cmd,
1439 unsigned int scsi_use_sg,
1440 struct scatterlist *sgpnt,
1442 enum dma_data_direction dma_dir)
1444 cmd->dma_dir = dma_dir;
1445 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1446 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1448 /* special case if only one element (and less than 64KB in size) */
1449 if ((scsi_use_sg == 1) &&
1450 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1452 cmd->dma_size = sgpnt[0].length;
1453 cmd->dma_type = CMD_DMA_PAGE;
1454 cmd->cmd_dma = pci_map_page(hi->host->pdev,
1455 sgpnt[0].page, sgpnt[0].offset,
1456 cmd->dma_size, cmd->dma_dir);
1458 orb->data_descriptor_lo = cmd->cmd_dma;
1459 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
1462 struct sbp2_unrestricted_page_table *sg_element =
1463 &cmd->scatter_gather_element[0];
1464 u32 sg_count, sg_len;
1466 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1469 cmd->dma_size = scsi_use_sg;
1470 cmd->sge_buffer = sgpnt;
1472 /* use page tables (s/g) */
1473 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1474 orb->data_descriptor_lo = cmd->sge_dma;
1476 /* loop through and fill out our SBP-2 page tables
1477 * (and split up anything too large) */
1478 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1479 sg_len = sg_dma_len(sgpnt);
1480 sg_addr = sg_dma_address(sgpnt);
1482 sg_element[sg_count].segment_base_lo = sg_addr;
1483 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1484 sg_element[sg_count].length_segment_base_hi =
1485 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1486 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1487 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1489 sg_element[sg_count].length_segment_base_hi =
1490 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1497 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1499 sbp2util_cpu_to_be32_buffer(sg_element,
1500 (sizeof(struct sbp2_unrestricted_page_table)) *
1505 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1506 struct sbp2_fwhost_info *hi,
1507 struct sbp2_command_info *cmd,
1508 struct scatterlist *sgpnt,
1510 unsigned int scsi_request_bufflen,
1511 void *scsi_request_buffer,
1512 enum dma_data_direction dma_dir)
1514 cmd->dma_dir = dma_dir;
1515 cmd->dma_size = scsi_request_bufflen;
1516 cmd->dma_type = CMD_DMA_SINGLE;
1517 cmd->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1518 cmd->dma_size, cmd->dma_dir);
1519 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1520 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1522 /* handle case where we get a command w/o s/g enabled
1523 * (but check for transfers larger than 64K) */
1524 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1526 orb->data_descriptor_lo = cmd->cmd_dma;
1527 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1530 /* The buffer is too large. Turn this into page tables. */
1532 struct sbp2_unrestricted_page_table *sg_element =
1533 &cmd->scatter_gather_element[0];
1534 u32 sg_count, sg_len;
1537 orb->data_descriptor_lo = cmd->sge_dma;
1538 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1540 /* fill out our SBP-2 page tables; split up the large buffer */
1542 sg_len = scsi_request_bufflen;
1543 sg_addr = cmd->cmd_dma;
1545 sg_element[sg_count].segment_base_lo = sg_addr;
1546 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1547 sg_element[sg_count].length_segment_base_hi =
1548 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1549 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1550 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1552 sg_element[sg_count].length_segment_base_hi =
1553 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1559 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1561 sbp2util_cpu_to_be32_buffer(sg_element,
1562 (sizeof(struct sbp2_unrestricted_page_table)) *
1567 static void sbp2_create_command_orb(struct sbp2_lu *lu,
1568 struct sbp2_command_info *cmd,
1570 unsigned int scsi_use_sg,
1571 unsigned int scsi_request_bufflen,
1572 void *scsi_request_buffer,
1573 enum dma_data_direction dma_dir)
1575 struct sbp2_fwhost_info *hi = lu->hi;
1576 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1577 struct sbp2_command_orb *orb = &cmd->command_orb;
1581 * Set-up our command ORB.
1583 * NOTE: We're doing unrestricted page tables (s/g), as this is
1584 * best performance (at least with the devices I have). This means
1585 * that data_size becomes the number of s/g elements, and
1586 * page_size should be zero (for unrestricted).
1588 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1589 orb->next_ORB_lo = 0x0;
1590 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1591 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1592 orb->misc |= ORB_SET_NOTIFY(1);
1594 if (dma_dir == DMA_NONE)
1595 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1596 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1597 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1598 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1599 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1601 SBP2_INFO("Falling back to DMA_NONE");
1602 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1605 /* set up our page table stuff */
1606 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1607 orb->data_descriptor_hi = 0x0;
1608 orb->data_descriptor_lo = 0x0;
1609 orb->misc |= ORB_SET_DIRECTION(1);
1610 } else if (scsi_use_sg)
1611 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
1612 orb_direction, dma_dir);
1614 sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
1615 scsi_request_bufflen,
1616 scsi_request_buffer, dma_dir);
1618 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1620 memset(orb->cdb, 0, 12);
1621 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1624 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1625 struct sbp2_command_info *cmd)
1627 struct sbp2_fwhost_info *hi = lu->hi;
1628 struct sbp2_command_orb *last_orb;
1629 dma_addr_t last_orb_dma;
1630 u64 addr = lu->command_block_agent_addr;
1633 unsigned long flags;
1635 pci_dma_sync_single_for_device(hi->host->pdev, cmd->command_orb_dma,
1636 sizeof(struct sbp2_command_orb),
1638 pci_dma_sync_single_for_device(hi->host->pdev, cmd->sge_dma,
1639 sizeof(cmd->scatter_gather_element),
1640 PCI_DMA_BIDIRECTIONAL);
1642 /* check to see if there are any previous orbs to use */
1643 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1644 last_orb = lu->last_orb;
1645 last_orb_dma = lu->last_orb_dma;
1648 * last_orb == NULL means: We know that the target's fetch agent
1649 * is not active right now.
1651 addr += SBP2_ORB_POINTER_OFFSET;
1652 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1653 data[1] = cmd->command_orb_dma;
1654 sbp2util_cpu_to_be32_buffer(data, 8);
1658 * last_orb != NULL means: We know that the target's fetch agent
1659 * is (very probably) not dead or in reset state right now.
1660 * We have an ORB already sent that we can append a new one to.
1661 * The target's fetch agent may or may not have read this
1664 pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma,
1665 sizeof(struct sbp2_command_orb),
1667 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1669 /* Tells hardware that this pointer is valid */
1670 last_orb->next_ORB_hi = 0;
1671 pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma,
1672 sizeof(struct sbp2_command_orb),
1674 addr += SBP2_DOORBELL_OFFSET;
1678 lu->last_orb = &cmd->command_orb;
1679 lu->last_orb_dma = cmd->command_orb_dma;
1680 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1682 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1684 * sbp2util_node_write_no_wait failed. We certainly ran out
1685 * of transaction labels, perhaps just because there were no
1686 * context switches which gave khpsbpkt a chance to collect
1687 * free tlabels. Try again in non-atomic context. If necessary,
1688 * the workqueue job will sleep to guaranteedly get a tlabel.
1689 * We do not accept new commands until the job is over.
1691 scsi_block_requests(lu->shost);
1692 PREPARE_WORK(&lu->protocol_work,
1693 last_orb ? sbp2util_write_doorbell:
1694 sbp2util_write_orb_pointer
1696 schedule_work(&lu->protocol_work);
1700 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1701 void (*done)(struct scsi_cmnd *))
1703 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
1704 unsigned int request_bufflen = SCpnt->request_bufflen;
1705 struct sbp2_command_info *cmd;
1707 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1711 sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
1712 request_bufflen, SCpnt->request_buffer,
1713 SCpnt->sc_data_direction);
1714 sbp2_link_orb_command(lu, cmd);
1720 * Translates SBP-2 status into SCSI sense data for check conditions
1722 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1725 /* OK, it's pretty ugly... ;-) */
1726 sense_data[0] = 0x70;
1727 sense_data[1] = 0x0;
1728 sense_data[2] = sbp2_status[9];
1729 sense_data[3] = sbp2_status[12];
1730 sense_data[4] = sbp2_status[13];
1731 sense_data[5] = sbp2_status[14];
1732 sense_data[6] = sbp2_status[15];
1734 sense_data[8] = sbp2_status[16];
1735 sense_data[9] = sbp2_status[17];
1736 sense_data[10] = sbp2_status[18];
1737 sense_data[11] = sbp2_status[19];
1738 sense_data[12] = sbp2_status[10];
1739 sense_data[13] = sbp2_status[11];
1740 sense_data[14] = sbp2_status[20];
1741 sense_data[15] = sbp2_status[21];
1743 return sbp2_status[8] & 0x3f;
1746 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1747 int destid, quadlet_t *data, u64 addr,
1748 size_t length, u16 fl)
1750 struct sbp2_fwhost_info *hi;
1751 struct sbp2_lu *lu = NULL, *lu_tmp;
1752 struct scsi_cmnd *SCpnt = NULL;
1753 struct sbp2_status_block *sb;
1754 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1755 struct sbp2_command_info *cmd;
1756 unsigned long flags;
1758 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1759 SBP2_ERR("Wrong size of status block");
1760 return RCODE_ADDRESS_ERROR;
1762 if (unlikely(!host)) {
1763 SBP2_ERR("host is NULL - this is bad!");
1764 return RCODE_ADDRESS_ERROR;
1766 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1767 if (unlikely(!hi)) {
1768 SBP2_ERR("host info is NULL - this is bad!");
1769 return RCODE_ADDRESS_ERROR;
1772 /* Find the unit which wrote the status. */
1773 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1774 if (lu_tmp->ne->nodeid == nodeid &&
1775 lu_tmp->status_fifo_addr == addr) {
1780 if (unlikely(!lu)) {
1781 SBP2_ERR("lu is NULL - device is gone?");
1782 return RCODE_ADDRESS_ERROR;
1785 /* Put response into lu status fifo buffer. The first two bytes
1786 * come in big endian bit order. Often the target writes only a
1787 * truncated status block, minimally the first two quadlets. The rest
1788 * is implied to be zeros. */
1789 sb = &lu->status_block;
1790 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1791 memcpy(sb, data, length);
1792 sbp2util_be32_to_cpu_buffer(sb, 8);
1794 /* Ignore unsolicited status. Handle command ORB status. */
1795 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1798 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1800 pci_dma_sync_single_for_cpu(hi->host->pdev,
1801 cmd->command_orb_dma,
1802 sizeof(struct sbp2_command_orb),
1804 pci_dma_sync_single_for_cpu(hi->host->pdev,
1806 sizeof(cmd->scatter_gather_element),
1807 PCI_DMA_BIDIRECTIONAL);
1808 /* Grab SCSI command pointers and check status. */
1810 * FIXME: If the src field in the status is 1, the ORB DMA must
1811 * not be reused until status for a subsequent ORB is received.
1813 SCpnt = cmd->Current_SCpnt;
1814 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1815 sbp2util_mark_command_completed(lu, cmd);
1816 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1819 u32 h = sb->ORB_offset_hi_misc;
1820 u32 r = STATUS_GET_RESP(h);
1822 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1823 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1824 r, STATUS_GET_SBP_STATUS(h));
1826 r == RESP_STATUS_TRANSPORT_FAILURE ?
1827 SBP2_SCSI_STATUS_BUSY :
1828 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1831 if (STATUS_GET_LEN(h) > 1)
1832 scsi_status = sbp2_status_to_sense_data(
1833 (unchar *)sb, SCpnt->sense_buffer);
1835 if (STATUS_TEST_DEAD(h))
1836 sbp2_agent_reset(lu, 0);
1839 /* Check here to see if there are no commands in-use. If there
1840 * are none, we know that the fetch agent left the active state
1841 * _and_ that we did not reactivate it yet. Therefore clear
1842 * last_orb so that next time we write directly to the
1843 * ORB_POINTER register. That way the fetch agent does not need
1844 * to refetch the next_ORB. */
1845 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1846 if (list_empty(&lu->cmd_orb_inuse))
1847 lu->last_orb = NULL;
1848 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1851 /* It's probably status after a management request. */
1852 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1853 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1854 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1855 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1856 lu->access_complete = 1;
1857 wake_up_interruptible(&sbp2_access_wq);
1862 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1864 return RCODE_COMPLETE;
1867 /**************************************
1868 * SCSI interface related section
1869 **************************************/
1871 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1872 void (*done)(struct scsi_cmnd *))
1874 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1875 struct sbp2_fwhost_info *hi;
1876 int result = DID_NO_CONNECT << 16;
1878 if (unlikely(!sbp2util_node_is_available(lu)))
1883 if (unlikely(!hi)) {
1884 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1888 /* Multiple units are currently represented to the SCSI core as separate
1889 * targets, not as one target with multiple LUs. Therefore return
1890 * selection time-out to any IO directed at non-zero LUNs. */
1891 if (unlikely(SCpnt->device->lun))
1894 /* handle the request sense command here (auto-request sense) */
1895 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
1896 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer,
1897 SCpnt->request_bufflen);
1898 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
1899 sbp2scsi_complete_command(lu, SBP2_SCSI_STATUS_GOOD, SCpnt,
1904 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1905 SBP2_ERR("Bus reset in progress - rejecting command");
1906 result = DID_BUS_BUSY << 16;
1910 /* Bidirectional commands are not yet implemented,
1911 * and unknown transfer direction not handled. */
1912 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1913 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1914 result = DID_ERROR << 16;
1918 if (sbp2_send_command(lu, SCpnt, done)) {
1919 SBP2_ERR("Error sending SCSI command");
1920 sbp2scsi_complete_command(lu,
1921 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1927 SCpnt->result = result;
1932 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1934 struct sbp2_fwhost_info *hi = lu->hi;
1935 struct list_head *lh;
1936 struct sbp2_command_info *cmd;
1937 unsigned long flags;
1939 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1940 while (!list_empty(&lu->cmd_orb_inuse)) {
1941 lh = lu->cmd_orb_inuse.next;
1942 cmd = list_entry(lh, struct sbp2_command_info, list);
1943 pci_dma_sync_single_for_cpu(hi->host->pdev,
1944 cmd->command_orb_dma,
1945 sizeof(struct sbp2_command_orb),
1947 pci_dma_sync_single_for_cpu(hi->host->pdev, cmd->sge_dma,
1948 sizeof(cmd->scatter_gather_element),
1949 PCI_DMA_BIDIRECTIONAL);
1950 sbp2util_mark_command_completed(lu, cmd);
1951 if (cmd->Current_SCpnt) {
1952 cmd->Current_SCpnt->result = status << 16;
1953 cmd->Current_done(cmd->Current_SCpnt);
1956 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1962 * Complete a regular SCSI command. Can be called in atomic context.
1964 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1965 struct scsi_cmnd *SCpnt,
1966 void (*done)(struct scsi_cmnd *))
1969 SBP2_ERR("SCpnt is NULL");
1973 switch (scsi_status) {
1974 case SBP2_SCSI_STATUS_GOOD:
1975 SCpnt->result = DID_OK << 16;
1978 case SBP2_SCSI_STATUS_BUSY:
1979 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1980 SCpnt->result = DID_BUS_BUSY << 16;
1983 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1984 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1987 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1988 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1989 SCpnt->result = DID_NO_CONNECT << 16;
1990 scsi_print_command(SCpnt);
1993 case SBP2_SCSI_STATUS_CONDITION_MET:
1994 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1995 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1996 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1997 SCpnt->result = DID_ERROR << 16;
1998 scsi_print_command(SCpnt);
2002 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2003 SCpnt->result = DID_ERROR << 16;
2006 /* If a bus reset is in progress and there was an error, complete
2007 * the command as busy so that it will get retried. */
2008 if (!hpsb_node_entry_valid(lu->ne)
2009 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2010 SBP2_ERR("Completing command with busy (bus reset)");
2011 SCpnt->result = DID_BUS_BUSY << 16;
2014 /* Tell the SCSI stack that we're done with this command. */
2018 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2020 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2023 sdev->allow_restart = 1;
2025 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2026 sdev->inquiry_len = 36;
2030 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2032 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2034 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2035 sdev->use_10_for_rw = 1;
2037 if (sdev->type == TYPE_DISK &&
2038 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2039 sdev->skip_ms_page_8 = 1;
2040 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2041 sdev->fix_capacity = 1;
2045 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2047 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2052 * Called by scsi stack when something has really gone wrong.
2053 * Usually called when a command has timed-out for some reason.
2055 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2057 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2058 struct sbp2_fwhost_info *hi = lu->hi;
2059 struct sbp2_command_info *cmd;
2060 unsigned long flags;
2062 SBP2_INFO("aborting sbp2 command");
2063 scsi_print_command(SCpnt);
2065 if (sbp2util_node_is_available(lu)) {
2066 sbp2_agent_reset(lu, 1);
2068 /* Return a matching command structure to the free pool. */
2069 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2070 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2072 pci_dma_sync_single_for_cpu(hi->host->pdev,
2073 cmd->command_orb_dma,
2074 sizeof(struct sbp2_command_orb),
2076 pci_dma_sync_single_for_cpu(hi->host->pdev,
2078 sizeof(cmd->scatter_gather_element),
2079 PCI_DMA_BIDIRECTIONAL);
2080 sbp2util_mark_command_completed(lu, cmd);
2081 if (cmd->Current_SCpnt) {
2082 cmd->Current_SCpnt->result = DID_ABORT << 16;
2083 cmd->Current_done(cmd->Current_SCpnt);
2086 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2088 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2095 * Called by scsi stack when something has really gone wrong.
2097 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2099 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2101 SBP2_INFO("reset requested");
2103 if (sbp2util_node_is_available(lu)) {
2104 SBP2_INFO("generating sbp2 fetch agent reset");
2105 sbp2_agent_reset(lu, 1);
2111 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2112 struct device_attribute *attr,
2115 struct scsi_device *sdev;
2118 if (!(sdev = to_scsi_device(dev)))
2121 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2124 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
2125 lu->ud->id, ORB_SET_LUN(lu->lun));
2128 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2129 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2130 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2131 MODULE_LICENSE("GPL");
2133 static int sbp2_module_init(void)
2137 if (sbp2_serialize_io) {
2138 sbp2_shost_template.can_queue = 1;
2139 sbp2_shost_template.cmd_per_lun = 1;
2142 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2143 (sbp2_max_sectors * 512) > (128 * 1024))
2144 sbp2_max_sectors = 128 * 1024 / 512;
2145 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2147 hpsb_register_highlevel(&sbp2_highlevel);
2148 ret = hpsb_register_protocol(&sbp2_driver);
2150 SBP2_ERR("Failed to register protocol");
2151 hpsb_unregister_highlevel(&sbp2_highlevel);
2157 static void __exit sbp2_module_exit(void)
2159 hpsb_unregister_protocol(&sbp2_driver);
2160 hpsb_unregister_highlevel(&sbp2_highlevel);
2163 module_init(sbp2_module_init);
2164 module_exit(sbp2_module_exit);