2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
32 * You may access any attached SBP-2 (usually storage devices) as regular
33 * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
35 * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
36 * specification and for where to purchase the official standard.
39 * - look into possible improvements of the SCSI error handlers
40 * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
41 * - handle Logical_Unit_Number.ordered
42 * - handle src == 1 in status blocks
43 * - reimplement the DMA mapping in absence of physical DMA so that
44 * bus_to_virt is no longer required
45 * - debug the handling of absent physical DMA
46 * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
47 * (this is easy but depends on the previous two TODO items)
48 * - make the parameter serialize_io configurable per device
49 * - move all requests to fetch agent registers into non-atomic context,
50 * replace all usages of sbp2util_node_write_no_wait by true transactions
51 * Grep for inline FIXME comments below.
54 #include <linux/blkdev.h>
55 #include <linux/compiler.h>
56 #include <linux/delay.h>
57 #include <linux/device.h>
58 #include <linux/dma-mapping.h>
59 #include <linux/gfp.h>
60 #include <linux/init.h>
61 #include <linux/kernel.h>
62 #include <linux/list.h>
64 #include <linux/module.h>
65 #include <linux/moduleparam.h>
66 #include <linux/sched.h>
67 #include <linux/slab.h>
68 #include <linux/spinlock.h>
69 #include <linux/stat.h>
70 #include <linux/string.h>
71 #include <linux/stringify.h>
72 #include <linux/types.h>
73 #include <linux/wait.h>
74 #include <linux/workqueue.h>
75 #include <linux/scatterlist.h>
77 #include <asm/byteorder.h>
78 #include <asm/errno.h>
79 #include <asm/param.h>
80 #include <asm/system.h>
81 #include <asm/types.h>
83 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
84 #include <asm/io.h> /* for bus_to_virt */
87 #include <scsi/scsi.h>
88 #include <scsi/scsi_cmnd.h>
89 #include <scsi/scsi_dbg.h>
90 #include <scsi/scsi_device.h>
91 #include <scsi/scsi_host.h>
94 #include "highlevel.h"
97 #include "ieee1394_core.h"
98 #include "ieee1394_hotplug.h"
99 #include "ieee1394_transactions.h"
100 #include "ieee1394_types.h"
105 * Module load parameter definitions
109 * Change max_speed on module load if you have a bad IEEE-1394
110 * controller that has trouble running 2KB packets at 400mb.
112 * NOTE: On certain OHCI parts I have seen short packets on async transmit
113 * (probably due to PCI latency/throughput issues with the part). You can
114 * bump down the speed if you are running into problems.
116 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
117 module_param_named(max_speed, sbp2_max_speed, int, 0644);
118 MODULE_PARM_DESC(max_speed, "Limit data transfer speed (5 <= 3200, "
119 "4 <= 1600, 3 <= 800, 2 <= 400, 1 <= 200, 0 = 100 Mb/s)");
122 * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
123 * This is and always has been buggy in multiple subtle ways. See above TODOs.
125 static int sbp2_serialize_io = 1;
126 module_param_named(serialize_io, sbp2_serialize_io, bool, 0444);
127 MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers "
128 "(default = Y, faster but buggy = N)");
131 * Adjust max_sectors if you'd like to influence how many sectors each SCSI
132 * command can transfer at most. Please note that some older SBP-2 bridge
133 * chips are broken for transfers greater or equal to 128KB, therefore
134 * max_sectors used to be a safe 255 sectors for many years. We now have a
135 * default of 0 here which means that we let the SCSI stack choose a limit.
137 * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds
138 * module parameter or in the sbp2_workarounds_table[], will override the
139 * value of max_sectors. We should use sbp2_workarounds_table[] to cover any
140 * bridge chip which becomes known to need the 255 sectors limit.
142 static int sbp2_max_sectors;
143 module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
144 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
145 "(default = 0 = use SCSI stack's default)");
148 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
149 * do an exclusive login, as it's generally unsafe to have two hosts
150 * talking to a single sbp2 device at the same time (filesystem coherency,
151 * etc.). If you're running an sbp2 device that supports multiple logins,
152 * and you're either running read-only filesystems or some sort of special
153 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
154 * File System, or Lustre, then set exclusive_login to zero.
156 * So far only bridges from Oxford Semiconductor are known to support
157 * concurrent logins. Depending on firmware, four or two concurrent logins
158 * are possible on OXFW911 and newer Oxsemi bridges.
160 static int sbp2_exclusive_login = 1;
161 module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644);
162 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
163 "(default = Y, use N for concurrent initiators)");
166 * If any of the following workarounds is required for your device to work,
167 * please submit the kernel messages logged by sbp2 to the linux1394-devel
170 * - 128kB max transfer
171 * Limit transfer size. Necessary for some old bridges.
174 * When scsi_mod probes the device, let the inquiry command look like that
178 * Suppress sending of mode_sense for mode page 8 if the device pretends to
179 * support the SCSI Primary Block commands instead of Reduced Block Commands.
182 * Tell sd_mod to correct the last sector number reported by read_capacity.
183 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
184 * Don't use this with devices which don't have this bug.
187 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
190 * Set the power condition field in the START STOP UNIT commands sent by
191 * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
192 * Some disks need this to spin down or to resume properly.
194 * - override internal blacklist
195 * Instead of adding to the built-in blacklist, use only the workarounds
196 * specified in the module load parameter.
197 * Useful if a blacklist entry interfered with a non-broken device.
199 static int sbp2_default_workarounds;
200 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
201 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
202 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
203 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
204 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
205 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
206 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
207 ", set power condition in start stop unit = "
208 __stringify(SBP2_WORKAROUND_POWER_CONDITION)
209 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
210 ", or a combination)");
213 * This influences the format of the sysfs attribute
214 * /sys/bus/scsi/devices/.../ieee1394_id.
216 * The default format is like in older kernels: %016Lx:%d:%d
217 * It contains the target's EUI-64, a number given to the logical unit by
218 * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
220 * The long format is: %016Lx:%06x:%04x
221 * It contains the target's EUI-64, the unit directory's directory_ID as per
222 * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
223 * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
224 * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
225 * independent of the implementation of the ieee1394 nodemgr, the longer format
226 * is recommended for future use.
228 static int sbp2_long_sysfs_ieee1394_id;
229 module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
230 MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
231 "(default = backwards-compatible = N, SAM-conforming = Y)");
234 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
235 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
240 static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
241 static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
242 void (*)(struct scsi_cmnd *));
243 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
244 static int sbp2_start_device(struct sbp2_lu *);
245 static void sbp2_remove_device(struct sbp2_lu *);
246 static int sbp2_login_device(struct sbp2_lu *);
247 static int sbp2_reconnect_device(struct sbp2_lu *);
248 static int sbp2_logout_device(struct sbp2_lu *);
249 static void sbp2_host_reset(struct hpsb_host *);
250 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
252 static int sbp2_agent_reset(struct sbp2_lu *, int);
253 static void sbp2_parse_unit_directory(struct sbp2_lu *,
254 struct unit_directory *);
255 static int sbp2_set_busy_timeout(struct sbp2_lu *);
256 static int sbp2_max_speed_and_size(struct sbp2_lu *);
259 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xa, 0xa, 0xa };
261 static DEFINE_RWLOCK(sbp2_hi_logical_units_lock);
263 static struct hpsb_highlevel sbp2_highlevel = {
264 .name = SBP2_DEVICE_NAME,
265 .host_reset = sbp2_host_reset,
268 const static struct hpsb_address_ops sbp2_ops = {
269 .write = sbp2_handle_status_write
272 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
273 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
275 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
278 const static struct hpsb_address_ops sbp2_physdma_ops = {
279 .read = sbp2_handle_physdma_read,
280 .write = sbp2_handle_physdma_write,
286 * Interface to driver core and IEEE 1394 core
288 static struct ieee1394_device_id sbp2_id_table[] = {
290 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
291 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
292 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
295 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
297 static int sbp2_probe(struct device *);
298 static int sbp2_remove(struct device *);
299 static int sbp2_update(struct unit_directory *);
301 static struct hpsb_protocol_driver sbp2_driver = {
302 .name = SBP2_DEVICE_NAME,
303 .id_table = sbp2_id_table,
304 .update = sbp2_update,
307 .remove = sbp2_remove,
313 * Interface to SCSI core
315 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
316 void (*)(struct scsi_cmnd *));
317 static int sbp2scsi_abort(struct scsi_cmnd *);
318 static int sbp2scsi_reset(struct scsi_cmnd *);
319 static int sbp2scsi_slave_alloc(struct scsi_device *);
320 static int sbp2scsi_slave_configure(struct scsi_device *);
321 static void sbp2scsi_slave_destroy(struct scsi_device *);
322 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
323 struct device_attribute *, char *);
325 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
327 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
328 &dev_attr_ieee1394_id,
332 static struct scsi_host_template sbp2_shost_template = {
333 .module = THIS_MODULE,
334 .name = "SBP-2 IEEE-1394",
335 .proc_name = SBP2_DEVICE_NAME,
336 .queuecommand = sbp2scsi_queuecommand,
337 .eh_abort_handler = sbp2scsi_abort,
338 .eh_device_reset_handler = sbp2scsi_reset,
339 .slave_alloc = sbp2scsi_slave_alloc,
340 .slave_configure = sbp2scsi_slave_configure,
341 .slave_destroy = sbp2scsi_slave_destroy,
343 .sg_tablesize = SG_ALL,
344 .use_clustering = ENABLE_CLUSTERING,
345 .cmd_per_lun = SBP2_MAX_CMDS,
346 .can_queue = SBP2_MAX_CMDS,
347 .sdev_attrs = sbp2_sysfs_sdev_attrs,
350 #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */
351 #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */
354 * List of devices with known bugs.
356 * The firmware_revision field, masked with 0xffff00, is the best indicator
357 * for the type of bridge chip of a device. It yields a few false positives
358 * but this did not break correctly behaving devices so far.
360 static const struct {
361 u32 firmware_revision;
363 unsigned workarounds;
364 } sbp2_workarounds_table[] = {
365 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
366 .firmware_revision = 0x002800,
368 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
369 SBP2_WORKAROUND_MODE_SENSE_8 |
370 SBP2_WORKAROUND_POWER_CONDITION,
372 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
373 .firmware_revision = 0x002800,
375 .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY |
376 SBP2_WORKAROUND_POWER_CONDITION,
378 /* Initio bridges, actually only needed for some older ones */ {
379 .firmware_revision = 0x000200,
380 .model = SBP2_ROM_VALUE_WILDCARD,
381 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
383 /* PL-3507 bridge with Prolific firmware */ {
384 .firmware_revision = 0x012800,
385 .model = SBP2_ROM_VALUE_WILDCARD,
386 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
388 /* Symbios bridge */ {
389 .firmware_revision = 0xa0b800,
390 .model = SBP2_ROM_VALUE_WILDCARD,
391 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
393 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
394 .firmware_revision = 0x002600,
395 .model = SBP2_ROM_VALUE_WILDCARD,
396 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
398 /* iPod 4th generation */ {
399 .firmware_revision = 0x0a2700,
401 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
404 .firmware_revision = 0x0a2700,
406 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
409 .firmware_revision = 0x0a2700,
411 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
414 .firmware_revision = 0x0a2700,
416 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
420 /**************************************
421 * General utility functions
422 **************************************/
426 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
428 static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
432 for (length = (length >> 2); length--; )
433 temp[length] = be32_to_cpu(temp[length]);
437 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
439 static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
443 for (length = (length >> 2); length--; )
444 temp[length] = cpu_to_be32(temp[length]);
446 #else /* BIG_ENDIAN */
447 /* Why waste the cpu cycles? */
448 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
449 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
452 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
455 * Waits for completion of an SBP-2 access request.
456 * Returns nonzero if timed out or prematurely interrupted.
458 static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
462 leftover = wait_event_interruptible_timeout(
463 sbp2_access_wq, lu->access_complete, timeout);
464 lu->access_complete = 0;
465 return leftover <= 0;
468 static void sbp2_free_packet(void *packet)
470 hpsb_free_tlabel(packet);
471 hpsb_free_packet(packet);
475 * This is much like hpsb_node_write(), except it ignores the response
476 * subaction and returns immediately. Can be used from atomic context.
478 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
479 quadlet_t *buf, size_t len)
481 struct hpsb_packet *packet;
483 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
487 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
488 hpsb_node_fill_packet(ne, packet);
489 if (hpsb_send_packet(packet) < 0) {
490 sbp2_free_packet(packet);
496 static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
497 quadlet_t *data, size_t len)
499 /* There is a small window after a bus reset within which the node
500 * entry's generation is current but the reconnect wasn't completed. */
501 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
504 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
506 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
508 /* Now accept new SCSI commands, unless a bus reset happended during
509 * hpsb_node_write. */
510 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
511 scsi_unblock_requests(lu->shost);
514 static void sbp2util_write_orb_pointer(struct work_struct *work)
516 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
519 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
520 data[1] = lu->last_orb_dma;
521 sbp2util_cpu_to_be32_buffer(data, 8);
522 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
525 static void sbp2util_write_doorbell(struct work_struct *work)
527 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
529 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
532 static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
534 struct sbp2_command_info *cmd;
535 struct device *dmadev = lu->hi->host->device.parent;
536 int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
538 for (i = 0; i < orbs; i++) {
539 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
543 cmd->command_orb_dma =
544 dma_map_single(dmadev, &cmd->command_orb,
545 sizeof(struct sbp2_command_orb),
547 if (dma_mapping_error(dmadev, cmd->command_orb_dma))
551 dma_map_single(dmadev, &cmd->scatter_gather_element,
552 sizeof(cmd->scatter_gather_element),
554 if (dma_mapping_error(dmadev, cmd->sge_dma))
557 INIT_LIST_HEAD(&cmd->list);
558 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
563 dma_unmap_single(dmadev, cmd->command_orb_dma,
564 sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
571 static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
572 struct hpsb_host *host)
574 struct list_head *lh, *next;
575 struct sbp2_command_info *cmd;
578 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
579 if (!list_empty(&lu->cmd_orb_completed))
580 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
581 cmd = list_entry(lh, struct sbp2_command_info, list);
582 dma_unmap_single(host->device.parent,
583 cmd->command_orb_dma,
584 sizeof(struct sbp2_command_orb),
586 dma_unmap_single(host->device.parent, cmd->sge_dma,
587 sizeof(cmd->scatter_gather_element),
591 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
596 * Finds the sbp2_command for a given outstanding command ORB.
597 * Only looks at the in-use list.
599 static struct sbp2_command_info *sbp2util_find_command_for_orb(
600 struct sbp2_lu *lu, dma_addr_t orb)
602 struct sbp2_command_info *cmd;
605 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
606 if (!list_empty(&lu->cmd_orb_inuse))
607 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
608 if (cmd->command_orb_dma == orb) {
609 spin_unlock_irqrestore(
610 &lu->cmd_orb_lock, flags);
613 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
618 * Finds the sbp2_command for a given outstanding SCpnt.
619 * Only looks at the in-use list.
620 * Must be called with lu->cmd_orb_lock held.
622 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
623 struct sbp2_lu *lu, void *SCpnt)
625 struct sbp2_command_info *cmd;
627 if (!list_empty(&lu->cmd_orb_inuse))
628 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
629 if (cmd->Current_SCpnt == SCpnt)
634 static struct sbp2_command_info *sbp2util_allocate_command_orb(
636 struct scsi_cmnd *Current_SCpnt,
637 void (*Current_done)(struct scsi_cmnd *))
639 struct list_head *lh;
640 struct sbp2_command_info *cmd = NULL;
643 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
644 if (!list_empty(&lu->cmd_orb_completed)) {
645 lh = lu->cmd_orb_completed.next;
647 cmd = list_entry(lh, struct sbp2_command_info, list);
648 cmd->Current_done = Current_done;
649 cmd->Current_SCpnt = Current_SCpnt;
650 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
652 SBP2_ERR("%s: no orbs available", __func__);
653 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
658 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
659 * Must be called with lu->cmd_orb_lock held.
661 static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
662 struct sbp2_command_info *cmd)
664 if (scsi_sg_count(cmd->Current_SCpnt))
665 dma_unmap_sg(lu->ud->ne->host->device.parent,
666 scsi_sglist(cmd->Current_SCpnt),
667 scsi_sg_count(cmd->Current_SCpnt),
668 cmd->Current_SCpnt->sc_data_direction);
669 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
673 * Is lu valid? Is the 1394 node still present?
675 static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
677 return lu && lu->ne && !lu->ne->in_limbo;
680 /*********************************************
681 * IEEE-1394 core driver stack related section
682 *********************************************/
684 static int sbp2_probe(struct device *dev)
686 struct unit_directory *ud;
689 ud = container_of(dev, struct unit_directory, device);
691 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
693 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
696 lu = sbp2_alloc_device(ud);
700 sbp2_parse_unit_directory(lu, ud);
701 return sbp2_start_device(lu);
704 static int sbp2_remove(struct device *dev)
706 struct unit_directory *ud;
708 struct scsi_device *sdev;
710 ud = container_of(dev, struct unit_directory, device);
711 lu = ud->device.driver_data;
716 /* Get rid of enqueued commands if there is no chance to
718 if (!sbp2util_node_is_available(lu))
719 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
720 /* scsi_remove_device() may trigger shutdown functions of SCSI
721 * highlevel drivers which would deadlock if blocked. */
722 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
723 scsi_unblock_requests(lu->shost);
728 scsi_remove_device(sdev);
731 sbp2_logout_device(lu);
732 sbp2_remove_device(lu);
737 static int sbp2_update(struct unit_directory *ud)
739 struct sbp2_lu *lu = ud->device.driver_data;
741 if (sbp2_reconnect_device(lu) != 0) {
743 * Reconnect failed. If another bus reset happened,
744 * let nodemgr proceed and call sbp2_update again later
745 * (or sbp2_remove if this node went away).
747 if (!hpsb_node_entry_valid(lu->ne))
750 * Or the target rejected the reconnect because we weren't
751 * fast enough. Try a regular login, but first log out
752 * just in case of any weirdness.
754 sbp2_logout_device(lu);
756 if (sbp2_login_device(lu) != 0) {
757 if (!hpsb_node_entry_valid(lu->ne))
760 /* Maybe another initiator won the login. */
761 SBP2_ERR("Failed to reconnect to sbp2 device!");
766 sbp2_set_busy_timeout(lu);
767 sbp2_agent_reset(lu, 1);
768 sbp2_max_speed_and_size(lu);
770 /* Complete any pending commands with busy (so they get retried)
771 * and remove them from our queue. */
772 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
774 /* Accept new commands unless there was another bus reset in the
776 if (hpsb_node_entry_valid(lu->ne)) {
777 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
778 scsi_unblock_requests(lu->shost);
783 static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
785 struct sbp2_fwhost_info *hi;
786 struct Scsi_Host *shost = NULL;
787 struct sbp2_lu *lu = NULL;
790 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
792 SBP2_ERR("failed to create lu");
798 lu->speed_code = IEEE1394_SPEED_100;
799 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
800 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
801 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
802 INIT_LIST_HEAD(&lu->cmd_orb_completed);
803 INIT_LIST_HEAD(&lu->lu_list);
804 spin_lock_init(&lu->cmd_orb_lock);
805 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
806 INIT_WORK(&lu->protocol_work, NULL);
808 ud->device.driver_data = lu;
810 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
812 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
815 SBP2_ERR("failed to allocate hostinfo");
818 hi->host = ud->ne->host;
819 INIT_LIST_HEAD(&hi->logical_units);
821 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
822 /* Handle data movement if physical dma is not
823 * enabled or not supported on host controller */
824 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
826 0x0ULL, 0xfffffffcULL)) {
827 SBP2_ERR("failed to register lower 4GB address range");
833 if (dma_get_max_seg_size(hi->host->device.parent) > SBP2_MAX_SEG_SIZE)
834 BUG_ON(dma_set_max_seg_size(hi->host->device.parent,
837 /* Prevent unloading of the 1394 host */
838 if (!try_module_get(hi->host->driver->owner)) {
839 SBP2_ERR("failed to get a reference on 1394 host driver");
845 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
846 list_add_tail(&lu->lu_list, &hi->logical_units);
847 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
849 /* Register the status FIFO address range. We could use the same FIFO
850 * for targets at different nodes. However we need different FIFOs per
851 * target in order to support multi-unit devices.
852 * The FIFO is located out of the local host controller's physical range
853 * but, if possible, within the posted write area. Status writes will
854 * then be performed as unified transactions. This slightly reduces
855 * bandwidth usage, and some Prolific based devices seem to require it.
857 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
858 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
859 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
860 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
861 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
862 SBP2_ERR("failed to allocate status FIFO address range");
866 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
868 SBP2_ERR("failed to register scsi host");
872 shost->hostdata[0] = (unsigned long)lu;
874 if (!scsi_add_host(shost, &ud->device)) {
879 SBP2_ERR("failed to add scsi host");
880 scsi_host_put(shost);
883 sbp2_remove_device(lu);
887 static void sbp2_host_reset(struct hpsb_host *host)
889 struct sbp2_fwhost_info *hi;
893 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
897 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
899 list_for_each_entry(lu, &hi->logical_units, lu_list)
900 if (atomic_cmpxchg(&lu->state,
901 SBP2LU_STATE_RUNNING, SBP2LU_STATE_IN_RESET)
902 == SBP2LU_STATE_RUNNING)
903 scsi_block_requests(lu->shost);
905 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
908 static int sbp2_start_device(struct sbp2_lu *lu)
910 struct sbp2_fwhost_info *hi = lu->hi;
913 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
914 sizeof(struct sbp2_login_response),
915 &lu->login_response_dma, GFP_KERNEL);
916 if (!lu->login_response)
919 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
920 sizeof(struct sbp2_query_logins_orb),
921 &lu->query_logins_orb_dma, GFP_KERNEL);
922 if (!lu->query_logins_orb)
925 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
926 sizeof(struct sbp2_query_logins_response),
927 &lu->query_logins_response_dma, GFP_KERNEL);
928 if (!lu->query_logins_response)
931 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
932 sizeof(struct sbp2_reconnect_orb),
933 &lu->reconnect_orb_dma, GFP_KERNEL);
934 if (!lu->reconnect_orb)
937 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
938 sizeof(struct sbp2_logout_orb),
939 &lu->logout_orb_dma, GFP_KERNEL);
943 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
944 sizeof(struct sbp2_login_orb),
945 &lu->login_orb_dma, GFP_KERNEL);
949 if (sbp2util_create_command_orb_pool(lu))
952 /* Wait a second before trying to log in. Previously logged in
953 * initiators need a chance to reconnect. */
954 if (msleep_interruptible(1000)) {
955 sbp2_remove_device(lu);
959 if (sbp2_login_device(lu)) {
960 sbp2_remove_device(lu);
964 sbp2_set_busy_timeout(lu);
965 sbp2_agent_reset(lu, 1);
966 sbp2_max_speed_and_size(lu);
968 if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
969 ssleep(SBP2_INQUIRY_DELAY);
971 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
973 SBP2_ERR("scsi_add_device failed");
974 sbp2_logout_device(lu);
975 sbp2_remove_device(lu);
982 SBP2_ERR("Could not allocate memory for lu");
983 sbp2_remove_device(lu);
987 static void sbp2_remove_device(struct sbp2_lu *lu)
989 struct sbp2_fwhost_info *hi;
999 scsi_remove_host(lu->shost);
1000 scsi_host_put(lu->shost);
1002 flush_scheduled_work();
1003 sbp2util_remove_command_orb_pool(lu, hi->host);
1005 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
1006 list_del(&lu->lu_list);
1007 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
1009 if (lu->login_response)
1010 dma_free_coherent(hi->host->device.parent,
1011 sizeof(struct sbp2_login_response),
1013 lu->login_response_dma);
1015 dma_free_coherent(hi->host->device.parent,
1016 sizeof(struct sbp2_login_orb),
1019 if (lu->reconnect_orb)
1020 dma_free_coherent(hi->host->device.parent,
1021 sizeof(struct sbp2_reconnect_orb),
1023 lu->reconnect_orb_dma);
1025 dma_free_coherent(hi->host->device.parent,
1026 sizeof(struct sbp2_logout_orb),
1028 lu->logout_orb_dma);
1029 if (lu->query_logins_orb)
1030 dma_free_coherent(hi->host->device.parent,
1031 sizeof(struct sbp2_query_logins_orb),
1032 lu->query_logins_orb,
1033 lu->query_logins_orb_dma);
1034 if (lu->query_logins_response)
1035 dma_free_coherent(hi->host->device.parent,
1036 sizeof(struct sbp2_query_logins_response),
1037 lu->query_logins_response,
1038 lu->query_logins_response_dma);
1040 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
1041 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1042 lu->status_fifo_addr);
1044 lu->ud->device.driver_data = NULL;
1046 module_put(hi->host->driver->owner);
1051 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1053 * Deal with write requests on adapters which do not support physical DMA or
1054 * have it switched off.
1056 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1057 int destid, quadlet_t *data, u64 addr,
1058 size_t length, u16 flags)
1060 memcpy(bus_to_virt((u32) addr), data, length);
1061 return RCODE_COMPLETE;
1065 * Deal with read requests on adapters which do not support physical DMA or
1066 * have it switched off.
1068 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1069 quadlet_t *data, u64 addr, size_t length,
1072 memcpy(data, bus_to_virt((u32) addr), length);
1073 return RCODE_COMPLETE;
1077 /**************************************
1078 * SBP-2 protocol related section
1079 **************************************/
1081 static int sbp2_query_logins(struct sbp2_lu *lu)
1083 struct sbp2_fwhost_info *hi = lu->hi;
1088 lu->query_logins_orb->reserved1 = 0x0;
1089 lu->query_logins_orb->reserved2 = 0x0;
1091 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1092 lu->query_logins_orb->query_response_hi =
1093 ORB_SET_NODE_ID(hi->host->node_id);
1094 lu->query_logins_orb->lun_misc =
1095 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1096 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1097 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1099 lu->query_logins_orb->reserved_resp_length =
1100 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1101 sizeof(struct sbp2_query_logins_response));
1103 lu->query_logins_orb->status_fifo_hi =
1104 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1105 lu->query_logins_orb->status_fifo_lo =
1106 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1108 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1109 sizeof(struct sbp2_query_logins_orb));
1111 memset(lu->query_logins_response, 0,
1112 sizeof(struct sbp2_query_logins_response));
1114 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1115 data[1] = lu->query_logins_orb_dma;
1116 sbp2util_cpu_to_be32_buffer(data, 8);
1118 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1120 if (sbp2util_access_timeout(lu, 2*HZ)) {
1121 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1125 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
1126 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1130 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1131 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1135 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1136 sizeof(struct sbp2_query_logins_response));
1138 max_logins = RESPONSE_GET_MAX_LOGINS(
1139 lu->query_logins_response->length_max_logins);
1140 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1142 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1143 lu->query_logins_response->length_max_logins);
1144 SBP2_INFO("Number of active logins: %d", active_logins);
1146 if (active_logins >= max_logins) {
1153 static int sbp2_login_device(struct sbp2_lu *lu)
1155 struct sbp2_fwhost_info *hi = lu->hi;
1161 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
1162 SBP2_INFO("Device does not support any more concurrent logins");
1166 /* assume no password */
1167 lu->login_orb->password_hi = 0;
1168 lu->login_orb->password_lo = 0;
1170 lu->login_orb->login_response_lo = lu->login_response_dma;
1171 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1172 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1174 /* one second reconnect time */
1175 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1176 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1177 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1178 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
1180 lu->login_orb->passwd_resp_lengths =
1181 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1183 lu->login_orb->status_fifo_hi =
1184 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1185 lu->login_orb->status_fifo_lo =
1186 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1188 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1189 sizeof(struct sbp2_login_orb));
1191 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
1193 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1194 data[1] = lu->login_orb_dma;
1195 sbp2util_cpu_to_be32_buffer(data, 8);
1197 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1199 /* wait up to 20 seconds for login status */
1200 if (sbp2util_access_timeout(lu, 20*HZ)) {
1201 SBP2_ERR("Error logging into SBP-2 device - timed out");
1205 /* make sure that the returned status matches the login ORB */
1206 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
1207 SBP2_ERR("Error logging into SBP-2 device - timed out");
1211 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1212 SBP2_ERR("Error logging into SBP-2 device - failed");
1216 sbp2util_cpu_to_be32_buffer(lu->login_response,
1217 sizeof(struct sbp2_login_response));
1218 lu->command_block_agent_addr =
1219 ((u64)lu->login_response->command_block_agent_hi) << 32;
1220 lu->command_block_agent_addr |=
1221 ((u64)lu->login_response->command_block_agent_lo);
1222 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
1224 SBP2_INFO("Logged into SBP-2 device");
1228 static int sbp2_logout_device(struct sbp2_lu *lu)
1230 struct sbp2_fwhost_info *hi = lu->hi;
1234 lu->logout_orb->reserved1 = 0x0;
1235 lu->logout_orb->reserved2 = 0x0;
1236 lu->logout_orb->reserved3 = 0x0;
1237 lu->logout_orb->reserved4 = 0x0;
1239 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1240 lu->logout_orb->login_ID_misc |=
1241 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1242 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1244 lu->logout_orb->reserved5 = 0x0;
1245 lu->logout_orb->status_fifo_hi =
1246 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1247 lu->logout_orb->status_fifo_lo =
1248 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1250 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1251 sizeof(struct sbp2_logout_orb));
1253 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1254 data[1] = lu->logout_orb_dma;
1255 sbp2util_cpu_to_be32_buffer(data, 8);
1257 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1261 /* wait up to 1 second for the device to complete logout */
1262 if (sbp2util_access_timeout(lu, HZ))
1265 SBP2_INFO("Logged out of SBP-2 device");
1269 static int sbp2_reconnect_device(struct sbp2_lu *lu)
1271 struct sbp2_fwhost_info *hi = lu->hi;
1275 lu->reconnect_orb->reserved1 = 0x0;
1276 lu->reconnect_orb->reserved2 = 0x0;
1277 lu->reconnect_orb->reserved3 = 0x0;
1278 lu->reconnect_orb->reserved4 = 0x0;
1280 lu->reconnect_orb->login_ID_misc =
1281 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1282 lu->reconnect_orb->login_ID_misc |=
1283 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1284 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1286 lu->reconnect_orb->reserved5 = 0x0;
1287 lu->reconnect_orb->status_fifo_hi =
1288 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1289 lu->reconnect_orb->status_fifo_lo =
1290 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
1292 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1293 sizeof(struct sbp2_reconnect_orb));
1295 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1296 data[1] = lu->reconnect_orb_dma;
1297 sbp2util_cpu_to_be32_buffer(data, 8);
1299 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
1303 /* wait up to 1 second for reconnect status */
1304 if (sbp2util_access_timeout(lu, HZ)) {
1305 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1309 /* make sure that the returned status matches the reconnect ORB */
1310 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
1311 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1315 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
1316 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1320 SBP2_INFO("Reconnected to SBP-2 device");
1325 * Set the target node's Single Phase Retry limit. Affects the target's retry
1326 * behaviour if our node is too busy to accept requests.
1328 static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
1332 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1333 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1334 SBP2_ERR("%s error", __func__);
1338 static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
1339 struct unit_directory *ud)
1341 struct csr1212_keyval *kv;
1342 struct csr1212_dentry *dentry;
1343 u64 management_agent_addr;
1344 u32 unit_characteristics, firmware_revision, model;
1345 unsigned workarounds;
1348 management_agent_addr = 0;
1349 unit_characteristics = 0;
1350 firmware_revision = SBP2_ROM_VALUE_MISSING;
1351 model = ud->flags & UNIT_DIRECTORY_MODEL_ID ?
1352 ud->model_id : SBP2_ROM_VALUE_MISSING;
1354 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1355 switch (kv->key.id) {
1356 case CSR1212_KV_ID_DEPENDENT_INFO:
1357 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1358 management_agent_addr =
1359 CSR1212_REGISTER_SPACE_BASE +
1360 (kv->value.csr_offset << 2);
1362 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1363 lu->lun = ORB_SET_LUN(kv->value.immediate);
1366 case SBP2_UNIT_CHARACTERISTICS_KEY:
1367 /* FIXME: This is ignored so far.
1368 * See SBP-2 clause 7.4.8. */
1369 unit_characteristics = kv->value.immediate;
1372 case SBP2_FIRMWARE_REVISION_KEY:
1373 firmware_revision = kv->value.immediate;
1377 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1378 * Its "ordered" bit has consequences for command ORB
1379 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1384 workarounds = sbp2_default_workarounds;
1386 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1387 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1388 if (sbp2_workarounds_table[i].firmware_revision !=
1389 SBP2_ROM_VALUE_WILDCARD &&
1390 sbp2_workarounds_table[i].firmware_revision !=
1391 (firmware_revision & 0xffff00))
1393 if (sbp2_workarounds_table[i].model !=
1394 SBP2_ROM_VALUE_WILDCARD &&
1395 sbp2_workarounds_table[i].model != model)
1397 workarounds |= sbp2_workarounds_table[i].workarounds;
1402 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1403 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1404 " model_id 0x%06x)",
1405 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1406 workarounds, firmware_revision,
1407 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1410 /* We would need one SCSI host template for each target to adjust
1411 * max_sectors on the fly, therefore warn only. */
1412 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1413 (sbp2_max_sectors * 512) > (128 * 1024))
1414 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1415 "max transfer size. WARNING: Current max_sectors "
1416 "setting is larger than 128KB (%d sectors)",
1417 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1420 /* If this is a logical unit directory entry, process the parent
1421 * to get the values. */
1422 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1423 struct unit_directory *parent_ud = container_of(
1424 ud->device.parent, struct unit_directory, device);
1425 sbp2_parse_unit_directory(lu, parent_ud);
1427 lu->management_agent_addr = management_agent_addr;
1428 lu->workarounds = workarounds;
1429 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1430 lu->lun = ORB_SET_LUN(ud->lun);
1434 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1437 * This function is called in order to determine the max speed and packet
1438 * size we can use in our ORBs. Note, that we (the driver and host) only
1439 * initiate the transaction. The SBP-2 device actually transfers the data
1440 * (by reading from the DMA area we tell it). This means that the SBP-2
1441 * device decides the actual maximum data it can transfer. We just tell it
1442 * the speed that it needs to use, and the max_rec the host supports, and
1443 * it takes care of the rest.
1445 static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
1447 struct sbp2_fwhost_info *hi = lu->hi;
1450 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
1452 if (lu->speed_code > sbp2_max_speed) {
1453 lu->speed_code = sbp2_max_speed;
1454 SBP2_INFO("Reducing speed to %s",
1455 hpsb_speedto_str[sbp2_max_speed]);
1458 /* Payload size is the lesser of what our speed supports and what
1459 * our host supports. */
1460 payload = min(sbp2_speedto_max_payload[lu->speed_code],
1461 (u8) (hi->host->csr.max_rec - 1));
1463 /* If physical DMA is off, work around limitation in ohci1394:
1464 * packet size must not exceed PAGE_SIZE */
1465 if (lu->ne->host->low_addr_space < (1ULL << 32))
1466 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1470 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1471 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1472 hpsb_speedto_str[lu->speed_code],
1473 SBP2_PAYLOAD_TO_BYTES(payload));
1475 lu->max_payload_size = payload;
1479 static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
1484 unsigned long flags;
1486 /* flush lu->protocol_work */
1488 flush_scheduled_work();
1490 data = ntohl(SBP2_AGENT_RESET_DATA);
1491 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1494 retval = hpsb_node_write(lu->ne, addr, &data, 4);
1496 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
1499 SBP2_ERR("hpsb_node_write failed.\n");
1503 /* make sure that the ORB_POINTER is written on next command */
1504 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1505 lu->last_orb = NULL;
1506 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1511 static int sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1512 struct sbp2_fwhost_info *hi,
1513 struct sbp2_command_info *cmd,
1514 unsigned int sg_count,
1515 struct scatterlist *sg,
1517 enum dma_data_direction dma_dir)
1519 struct device *dmadev = hi->host->device.parent;
1520 struct sbp2_unrestricted_page_table *pt;
1523 n = dma_map_sg(dmadev, sg, sg_count, dma_dir);
1527 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1528 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1530 /* special case if only one element (and less than 64KB in size) */
1532 orb->misc |= ORB_SET_DATA_SIZE(sg_dma_len(sg));
1533 orb->data_descriptor_lo = sg_dma_address(sg);
1535 pt = &cmd->scatter_gather_element[0];
1537 dma_sync_single_for_cpu(dmadev, cmd->sge_dma,
1538 sizeof(cmd->scatter_gather_element),
1541 for_each_sg(sg, sg, n, i) {
1542 pt[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
1543 pt[i].low = cpu_to_be32(sg_dma_address(sg));
1546 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1) |
1547 ORB_SET_DATA_SIZE(n);
1548 orb->data_descriptor_lo = cmd->sge_dma;
1550 dma_sync_single_for_device(dmadev, cmd->sge_dma,
1551 sizeof(cmd->scatter_gather_element),
1557 static int sbp2_create_command_orb(struct sbp2_lu *lu,
1558 struct sbp2_command_info *cmd,
1559 struct scsi_cmnd *SCpnt)
1561 struct device *dmadev = lu->hi->host->device.parent;
1562 struct sbp2_command_orb *orb = &cmd->command_orb;
1563 unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt);
1564 enum dma_data_direction dma_dir = SCpnt->sc_data_direction;
1568 dma_sync_single_for_cpu(dmadev, cmd->command_orb_dma,
1569 sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
1571 * Set-up our command ORB.
1573 * NOTE: We're doing unrestricted page tables (s/g), as this is
1574 * best performance (at least with the devices I have). This means
1575 * that data_size becomes the number of s/g elements, and
1576 * page_size should be zero (for unrestricted).
1578 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1579 orb->next_ORB_lo = 0x0;
1580 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1581 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1582 orb->misc |= ORB_SET_NOTIFY(1);
1584 if (dma_dir == DMA_NONE)
1585 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1586 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1587 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1588 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1589 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1591 SBP2_INFO("Falling back to DMA_NONE");
1592 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1595 /* set up our page table stuff */
1596 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1597 orb->data_descriptor_hi = 0x0;
1598 orb->data_descriptor_lo = 0x0;
1599 orb->misc |= ORB_SET_DIRECTION(1);
1602 ret = sbp2_prep_command_orb_sg(orb, lu->hi, cmd,
1603 scsi_sg_count(SCpnt),
1605 orb_direction, dma_dir);
1607 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
1609 memset(orb->cdb, 0, sizeof(orb->cdb));
1610 memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len);
1612 dma_sync_single_for_device(dmadev, cmd->command_orb_dma,
1613 sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
1617 static void sbp2_link_orb_command(struct sbp2_lu *lu,
1618 struct sbp2_command_info *cmd)
1620 struct sbp2_fwhost_info *hi = lu->hi;
1621 struct sbp2_command_orb *last_orb;
1622 dma_addr_t last_orb_dma;
1623 u64 addr = lu->command_block_agent_addr;
1626 unsigned long flags;
1628 /* check to see if there are any previous orbs to use */
1629 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1630 last_orb = lu->last_orb;
1631 last_orb_dma = lu->last_orb_dma;
1634 * last_orb == NULL means: We know that the target's fetch agent
1635 * is not active right now.
1637 addr += SBP2_ORB_POINTER_OFFSET;
1638 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1639 data[1] = cmd->command_orb_dma;
1640 sbp2util_cpu_to_be32_buffer(data, 8);
1644 * last_orb != NULL means: We know that the target's fetch agent
1645 * is (very probably) not dead or in reset state right now.
1646 * We have an ORB already sent that we can append a new one to.
1647 * The target's fetch agent may or may not have read this
1650 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
1651 sizeof(struct sbp2_command_orb),
1653 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
1655 /* Tells hardware that this pointer is valid */
1656 last_orb->next_ORB_hi = 0;
1657 dma_sync_single_for_device(hi->host->device.parent,
1659 sizeof(struct sbp2_command_orb),
1661 addr += SBP2_DOORBELL_OFFSET;
1665 lu->last_orb = &cmd->command_orb;
1666 lu->last_orb_dma = cmd->command_orb_dma;
1667 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1669 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
1671 * sbp2util_node_write_no_wait failed. We certainly ran out
1672 * of transaction labels, perhaps just because there were no
1673 * context switches which gave khpsbpkt a chance to collect
1674 * free tlabels. Try again in non-atomic context. If necessary,
1675 * the workqueue job will sleep to guaranteedly get a tlabel.
1676 * We do not accept new commands until the job is over.
1678 scsi_block_requests(lu->shost);
1679 PREPARE_WORK(&lu->protocol_work,
1680 last_orb ? sbp2util_write_doorbell:
1681 sbp2util_write_orb_pointer);
1682 schedule_work(&lu->protocol_work);
1686 static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
1687 void (*done)(struct scsi_cmnd *))
1689 struct sbp2_command_info *cmd;
1691 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1695 if (sbp2_create_command_orb(lu, cmd, SCpnt))
1698 sbp2_link_orb_command(lu, cmd);
1703 * Translates SBP-2 status into SCSI sense data for check conditions
1705 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1708 /* OK, it's pretty ugly... ;-) */
1709 sense_data[0] = 0x70;
1710 sense_data[1] = 0x0;
1711 sense_data[2] = sbp2_status[9];
1712 sense_data[3] = sbp2_status[12];
1713 sense_data[4] = sbp2_status[13];
1714 sense_data[5] = sbp2_status[14];
1715 sense_data[6] = sbp2_status[15];
1717 sense_data[8] = sbp2_status[16];
1718 sense_data[9] = sbp2_status[17];
1719 sense_data[10] = sbp2_status[18];
1720 sense_data[11] = sbp2_status[19];
1721 sense_data[12] = sbp2_status[10];
1722 sense_data[13] = sbp2_status[11];
1723 sense_data[14] = sbp2_status[20];
1724 sense_data[15] = sbp2_status[21];
1726 return sbp2_status[8] & 0x3f;
1729 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1730 int destid, quadlet_t *data, u64 addr,
1731 size_t length, u16 fl)
1733 struct sbp2_fwhost_info *hi;
1734 struct sbp2_lu *lu = NULL, *lu_tmp;
1735 struct scsi_cmnd *SCpnt = NULL;
1736 struct sbp2_status_block *sb;
1737 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1738 struct sbp2_command_info *cmd;
1739 unsigned long flags;
1741 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1742 SBP2_ERR("Wrong size of status block");
1743 return RCODE_ADDRESS_ERROR;
1745 if (unlikely(!host)) {
1746 SBP2_ERR("host is NULL - this is bad!");
1747 return RCODE_ADDRESS_ERROR;
1749 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1750 if (unlikely(!hi)) {
1751 SBP2_ERR("host info is NULL - this is bad!");
1752 return RCODE_ADDRESS_ERROR;
1755 /* Find the unit which wrote the status. */
1756 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
1757 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1758 if (lu_tmp->ne->nodeid == nodeid &&
1759 lu_tmp->status_fifo_addr == addr) {
1764 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
1766 if (unlikely(!lu)) {
1767 SBP2_ERR("lu is NULL - device is gone?");
1768 return RCODE_ADDRESS_ERROR;
1771 /* Put response into lu status fifo buffer. The first two bytes
1772 * come in big endian bit order. Often the target writes only a
1773 * truncated status block, minimally the first two quadlets. The rest
1774 * is implied to be zeros. */
1775 sb = &lu->status_block;
1776 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1777 memcpy(sb, data, length);
1778 sbp2util_be32_to_cpu_buffer(sb, 8);
1780 /* Ignore unsolicited status. Handle command ORB status. */
1781 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1784 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1786 /* Grab SCSI command pointers and check status. */
1788 * FIXME: If the src field in the status is 1, the ORB DMA must
1789 * not be reused until status for a subsequent ORB is received.
1791 SCpnt = cmd->Current_SCpnt;
1792 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1793 sbp2util_mark_command_completed(lu, cmd);
1794 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1797 u32 h = sb->ORB_offset_hi_misc;
1798 u32 r = STATUS_GET_RESP(h);
1800 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1801 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1802 r, STATUS_GET_SBP_STATUS(h));
1804 r == RESP_STATUS_TRANSPORT_FAILURE ?
1805 SBP2_SCSI_STATUS_BUSY :
1806 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1809 if (STATUS_GET_LEN(h) > 1)
1810 scsi_status = sbp2_status_to_sense_data(
1811 (unchar *)sb, SCpnt->sense_buffer);
1813 if (STATUS_TEST_DEAD(h))
1814 sbp2_agent_reset(lu, 0);
1817 /* Check here to see if there are no commands in-use. If there
1818 * are none, we know that the fetch agent left the active state
1819 * _and_ that we did not reactivate it yet. Therefore clear
1820 * last_orb so that next time we write directly to the
1821 * ORB_POINTER register. That way the fetch agent does not need
1822 * to refetch the next_ORB. */
1823 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1824 if (list_empty(&lu->cmd_orb_inuse))
1825 lu->last_orb = NULL;
1826 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1829 /* It's probably status after a management request. */
1830 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1831 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1832 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1833 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1834 lu->access_complete = 1;
1835 wake_up_interruptible(&sbp2_access_wq);
1840 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1842 return RCODE_COMPLETE;
1845 /**************************************
1846 * SCSI interface related section
1847 **************************************/
1849 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1850 void (*done)(struct scsi_cmnd *))
1852 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
1853 struct sbp2_fwhost_info *hi;
1854 int result = DID_NO_CONNECT << 16;
1856 if (unlikely(!sbp2util_node_is_available(lu)))
1861 if (unlikely(!hi)) {
1862 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1866 /* Multiple units are currently represented to the SCSI core as separate
1867 * targets, not as one target with multiple LUs. Therefore return
1868 * selection time-out to any IO directed at non-zero LUNs. */
1869 if (unlikely(SCpnt->device->lun))
1872 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
1873 SBP2_ERR("Bus reset in progress - rejecting command");
1874 result = DID_BUS_BUSY << 16;
1878 /* Bidirectional commands are not yet implemented,
1879 * and unknown transfer direction not handled. */
1880 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1881 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1882 result = DID_ERROR << 16;
1886 if (sbp2_send_command(lu, SCpnt, done)) {
1887 SBP2_ERR("Error sending SCSI command");
1888 sbp2scsi_complete_command(lu,
1889 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1895 SCpnt->result = result;
1900 static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
1902 struct list_head *lh;
1903 struct sbp2_command_info *cmd;
1904 unsigned long flags;
1906 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1907 while (!list_empty(&lu->cmd_orb_inuse)) {
1908 lh = lu->cmd_orb_inuse.next;
1909 cmd = list_entry(lh, struct sbp2_command_info, list);
1910 sbp2util_mark_command_completed(lu, cmd);
1911 if (cmd->Current_SCpnt) {
1912 cmd->Current_SCpnt->result = status << 16;
1913 cmd->Current_done(cmd->Current_SCpnt);
1916 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
1922 * Complete a regular SCSI command. Can be called in atomic context.
1924 static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1925 struct scsi_cmnd *SCpnt,
1926 void (*done)(struct scsi_cmnd *))
1929 SBP2_ERR("SCpnt is NULL");
1933 switch (scsi_status) {
1934 case SBP2_SCSI_STATUS_GOOD:
1935 SCpnt->result = DID_OK << 16;
1938 case SBP2_SCSI_STATUS_BUSY:
1939 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1940 SCpnt->result = DID_BUS_BUSY << 16;
1943 case SBP2_SCSI_STATUS_CHECK_CONDITION:
1944 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1947 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1948 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1949 SCpnt->result = DID_NO_CONNECT << 16;
1950 scsi_print_command(SCpnt);
1953 case SBP2_SCSI_STATUS_CONDITION_MET:
1954 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1955 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1956 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1957 SCpnt->result = DID_ERROR << 16;
1958 scsi_print_command(SCpnt);
1962 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1963 SCpnt->result = DID_ERROR << 16;
1966 /* If a bus reset is in progress and there was an error, complete
1967 * the command as busy so that it will get retried. */
1968 if (!hpsb_node_entry_valid(lu->ne)
1969 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1970 SBP2_ERR("Completing command with busy (bus reset)");
1971 SCpnt->result = DID_BUS_BUSY << 16;
1974 /* Tell the SCSI stack that we're done with this command. */
1978 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1980 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
1982 if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0)
1986 sdev->allow_restart = 1;
1988 /* SBP-2 requires quadlet alignment of the data buffers. */
1989 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
1991 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
1992 sdev->inquiry_len = 36;
1996 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
1998 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
2000 sdev->use_10_for_rw = 1;
2002 if (sbp2_exclusive_login)
2003 sdev->manage_start_stop = 1;
2004 if (sdev->type == TYPE_ROM)
2005 sdev->use_10_for_ms = 1;
2006 if (sdev->type == TYPE_DISK &&
2007 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2008 sdev->skip_ms_page_8 = 1;
2009 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2010 sdev->fix_capacity = 1;
2011 if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
2012 sdev->start_stop_pwr_cond = 1;
2013 if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
2014 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
2016 blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
2020 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2022 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
2027 * Called by scsi stack when something has really gone wrong.
2028 * Usually called when a command has timed-out for some reason.
2030 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2032 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2033 struct sbp2_command_info *cmd;
2034 unsigned long flags;
2036 SBP2_INFO("aborting sbp2 command");
2037 scsi_print_command(SCpnt);
2039 if (sbp2util_node_is_available(lu)) {
2040 sbp2_agent_reset(lu, 1);
2042 /* Return a matching command structure to the free pool. */
2043 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2044 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2046 sbp2util_mark_command_completed(lu, cmd);
2047 if (cmd->Current_SCpnt) {
2048 cmd->Current_SCpnt->result = DID_ABORT << 16;
2049 cmd->Current_done(cmd->Current_SCpnt);
2052 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
2054 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
2061 * Called by scsi stack when something has really gone wrong.
2063 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2065 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2067 SBP2_INFO("reset requested");
2069 if (sbp2util_node_is_available(lu)) {
2070 SBP2_INFO("generating sbp2 fetch agent reset");
2071 sbp2_agent_reset(lu, 1);
2077 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2078 struct device_attribute *attr,
2081 struct scsi_device *sdev;
2084 if (!(sdev = to_scsi_device(dev)))
2087 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
2090 if (sbp2_long_sysfs_ieee1394_id)
2091 return sprintf(buf, "%016Lx:%06x:%04x\n",
2092 (unsigned long long)lu->ne->guid,
2093 lu->ud->directory_id, ORB_SET_LUN(lu->lun));
2095 return sprintf(buf, "%016Lx:%d:%d\n",
2096 (unsigned long long)lu->ne->guid,
2097 lu->ud->id, ORB_SET_LUN(lu->lun));
2100 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2101 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2102 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2103 MODULE_LICENSE("GPL");
2105 static int sbp2_module_init(void)
2109 if (sbp2_serialize_io) {
2110 sbp2_shost_template.can_queue = 1;
2111 sbp2_shost_template.cmd_per_lun = 1;
2114 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2116 hpsb_register_highlevel(&sbp2_highlevel);
2117 ret = hpsb_register_protocol(&sbp2_driver);
2119 SBP2_ERR("Failed to register protocol");
2120 hpsb_unregister_highlevel(&sbp2_highlevel);
2126 static void __exit sbp2_module_exit(void)
2128 hpsb_unregister_protocol(&sbp2_driver);
2129 hpsb_unregister_highlevel(&sbp2_highlevel);
2132 module_init(sbp2_module_init);
2133 module_exit(sbp2_module_exit);