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 scsi_id_instance_data *, u32);
193 static void sbp2scsi_complete_command(struct scsi_id_instance_data *, u32,
195 void (*)(struct scsi_cmnd *));
196 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *);
197 static int sbp2_start_device(struct scsi_id_instance_data *);
198 static void sbp2_remove_device(struct scsi_id_instance_data *);
199 static int sbp2_login_device(struct scsi_id_instance_data *);
200 static int sbp2_reconnect_device(struct scsi_id_instance_data *);
201 static int sbp2_logout_device(struct scsi_id_instance_data *);
202 static void sbp2_host_reset(struct hpsb_host *);
203 static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
205 static int sbp2_agent_reset(struct scsi_id_instance_data *, int);
206 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *,
207 struct unit_directory *);
208 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *);
209 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *);
212 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
214 static struct hpsb_highlevel sbp2_highlevel = {
215 .name = SBP2_DEVICE_NAME,
216 .host_reset = sbp2_host_reset,
219 static struct hpsb_address_ops sbp2_ops = {
220 .write = sbp2_handle_status_write
223 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
224 static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
226 static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
229 static struct hpsb_address_ops sbp2_physdma_ops = {
230 .read = sbp2_handle_physdma_read,
231 .write = sbp2_handle_physdma_write,
237 * Interface to driver core and IEEE 1394 core
239 static struct ieee1394_device_id sbp2_id_table[] = {
241 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
242 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
243 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
246 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
248 static int sbp2_probe(struct device *);
249 static int sbp2_remove(struct device *);
250 static int sbp2_update(struct unit_directory *);
252 static struct hpsb_protocol_driver sbp2_driver = {
253 .name = "SBP2 Driver",
254 .id_table = sbp2_id_table,
255 .update = sbp2_update,
257 .name = SBP2_DEVICE_NAME,
258 .bus = &ieee1394_bus_type,
260 .remove = sbp2_remove,
266 * Interface to SCSI core
268 static int sbp2scsi_queuecommand(struct scsi_cmnd *,
269 void (*)(struct scsi_cmnd *));
270 static int sbp2scsi_abort(struct scsi_cmnd *);
271 static int sbp2scsi_reset(struct scsi_cmnd *);
272 static int sbp2scsi_slave_alloc(struct scsi_device *);
273 static int sbp2scsi_slave_configure(struct scsi_device *);
274 static void sbp2scsi_slave_destroy(struct scsi_device *);
275 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
276 struct device_attribute *, char *);
278 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
280 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
281 &dev_attr_ieee1394_id,
285 static struct scsi_host_template sbp2_shost_template = {
286 .module = THIS_MODULE,
287 .name = "SBP-2 IEEE-1394",
288 .proc_name = SBP2_DEVICE_NAME,
289 .queuecommand = sbp2scsi_queuecommand,
290 .eh_abort_handler = sbp2scsi_abort,
291 .eh_device_reset_handler = sbp2scsi_reset,
292 .slave_alloc = sbp2scsi_slave_alloc,
293 .slave_configure = sbp2scsi_slave_configure,
294 .slave_destroy = sbp2scsi_slave_destroy,
296 .sg_tablesize = SG_ALL,
297 .use_clustering = ENABLE_CLUSTERING,
298 .cmd_per_lun = SBP2_MAX_CMDS,
299 .can_queue = SBP2_MAX_CMDS,
301 .sdev_attrs = sbp2_sysfs_sdev_attrs,
306 * List of devices with known bugs.
308 * The firmware_revision field, masked with 0xffff00, is the best indicator
309 * for the type of bridge chip of a device. It yields a few false positives
310 * but this did not break correctly behaving devices so far.
312 static const struct {
313 u32 firmware_revision;
315 unsigned workarounds;
316 } sbp2_workarounds_table[] = {
317 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
318 .firmware_revision = 0x002800,
319 .model_id = 0x001010,
320 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
321 SBP2_WORKAROUND_MODE_SENSE_8,
323 /* Initio bridges, actually only needed for some older ones */ {
324 .firmware_revision = 0x000200,
325 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
327 /* Symbios bridge */ {
328 .firmware_revision = 0xa0b800,
329 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
332 * Note about the following Apple iPod blacklist entries:
334 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
335 * matching logic treats 0 as a wildcard, we cannot match this ID
336 * without rewriting the matching routine. Fortunately these iPods
337 * do not feature the read_capacity bug according to one report.
338 * Read_capacity behaviour as well as model_id could change due to
339 * Apple-supplied firmware updates though.
341 /* iPod 4th generation */ {
342 .firmware_revision = 0x0a2700,
343 .model_id = 0x000021,
344 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
347 .firmware_revision = 0x0a2700,
348 .model_id = 0x000023,
349 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
352 .firmware_revision = 0x0a2700,
353 .model_id = 0x00007e,
354 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
358 /**************************************
359 * General utility functions
360 **************************************/
364 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
366 static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
370 for (length = (length >> 2); length--; )
371 temp[length] = be32_to_cpu(temp[length]);
377 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
379 static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
383 for (length = (length >> 2); length--; )
384 temp[length] = cpu_to_be32(temp[length]);
388 #else /* BIG_ENDIAN */
389 /* Why waste the cpu cycles? */
390 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
391 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
394 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
397 * Waits for completion of an SBP-2 access request.
398 * Returns nonzero if timed out or prematurely interrupted.
400 static int sbp2util_access_timeout(struct scsi_id_instance_data *scsi_id,
405 leftover = wait_event_interruptible_timeout(
406 sbp2_access_wq, scsi_id->access_complete, timeout);
407 scsi_id->access_complete = 0;
408 return leftover <= 0;
411 static void sbp2_free_packet(struct hpsb_packet *packet)
413 hpsb_free_tlabel(packet);
414 hpsb_free_packet(packet);
418 * This is much like hpsb_node_write(), except it ignores the response
419 * subaction and returns immediately. Can be used from atomic context.
421 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
422 quadlet_t *buffer, size_t length)
424 struct hpsb_packet *packet;
426 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
427 addr, buffer, length);
431 hpsb_set_packet_complete_task(packet,
432 (void (*)(void *))sbp2_free_packet,
435 hpsb_node_fill_packet(ne, packet);
437 if (hpsb_send_packet(packet) < 0) {
438 sbp2_free_packet(packet);
445 static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id,
446 u64 offset, quadlet_t *data, size_t len)
449 * There is a small window after a bus reset within which the node
450 * entry's generation is current but the reconnect wasn't completed.
452 if (unlikely(atomic_read(&scsi_id->state) == SBP2LU_STATE_IN_RESET))
455 if (hpsb_node_write(scsi_id->ne,
456 scsi_id->command_block_agent_addr + offset,
458 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
460 * Now accept new SCSI commands, unless a bus reset happended during
463 if (likely(atomic_read(&scsi_id->state) != SBP2LU_STATE_IN_RESET))
464 scsi_unblock_requests(scsi_id->scsi_host);
467 static void sbp2util_write_orb_pointer(struct work_struct *work)
471 data[0] = ORB_SET_NODE_ID(
472 (container_of(work, struct scsi_id_instance_data, protocol_work))->hi->host->node_id);
473 data[1] = (container_of(work, struct scsi_id_instance_data, protocol_work))->last_orb_dma;
474 sbp2util_cpu_to_be32_buffer(data, 8);
475 sbp2util_notify_fetch_agent(container_of(work, struct scsi_id_instance_data, protocol_work), SBP2_ORB_POINTER_OFFSET, data, 8);
478 static void sbp2util_write_doorbell(struct work_struct *work)
480 sbp2util_notify_fetch_agent(container_of(work, struct scsi_id_instance_data, protocol_work), SBP2_DOORBELL_OFFSET, NULL, 4);
483 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
485 struct sbp2_fwhost_info *hi = scsi_id->hi;
487 unsigned long flags, orbs;
488 struct sbp2_command_info *command;
490 orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
492 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
493 for (i = 0; i < orbs; i++) {
494 command = kzalloc(sizeof(*command), GFP_ATOMIC);
496 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock,
500 command->command_orb_dma =
501 pci_map_single(hi->host->pdev, &command->command_orb,
502 sizeof(struct sbp2_command_orb),
505 pci_map_single(hi->host->pdev,
506 &command->scatter_gather_element,
507 sizeof(command->scatter_gather_element),
508 PCI_DMA_BIDIRECTIONAL);
509 INIT_LIST_HEAD(&command->list);
510 list_add_tail(&command->list, &scsi_id->cmd_orb_completed);
512 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
516 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
518 struct hpsb_host *host = scsi_id->hi->host;
519 struct list_head *lh, *next;
520 struct sbp2_command_info *command;
523 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
524 if (!list_empty(&scsi_id->cmd_orb_completed)) {
525 list_for_each_safe(lh, next, &scsi_id->cmd_orb_completed) {
526 command = list_entry(lh, struct sbp2_command_info, list);
527 pci_unmap_single(host->pdev, command->command_orb_dma,
528 sizeof(struct sbp2_command_orb),
530 pci_unmap_single(host->pdev, command->sge_dma,
531 sizeof(command->scatter_gather_element),
532 PCI_DMA_BIDIRECTIONAL);
536 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
541 * Finds the sbp2_command for a given outstanding command ORB.
542 * Only looks at the in-use list.
544 static struct sbp2_command_info *sbp2util_find_command_for_orb(
545 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
547 struct sbp2_command_info *command;
550 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
551 if (!list_empty(&scsi_id->cmd_orb_inuse)) {
552 list_for_each_entry(command, &scsi_id->cmd_orb_inuse, list) {
553 if (command->command_orb_dma == orb) {
554 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
559 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
564 * Finds the sbp2_command for a given outstanding SCpnt.
565 * Only looks at the in-use list.
566 * Must be called with scsi_id->cmd_orb_lock held.
568 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
569 struct scsi_id_instance_data *scsi_id, void *SCpnt)
571 struct sbp2_command_info *command;
573 if (!list_empty(&scsi_id->cmd_orb_inuse))
574 list_for_each_entry(command, &scsi_id->cmd_orb_inuse, list)
575 if (command->Current_SCpnt == SCpnt)
580 static struct sbp2_command_info *sbp2util_allocate_command_orb(
581 struct scsi_id_instance_data *scsi_id,
582 struct scsi_cmnd *Current_SCpnt,
583 void (*Current_done)(struct scsi_cmnd *))
585 struct list_head *lh;
586 struct sbp2_command_info *command = NULL;
589 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
590 if (!list_empty(&scsi_id->cmd_orb_completed)) {
591 lh = scsi_id->cmd_orb_completed.next;
593 command = list_entry(lh, struct sbp2_command_info, list);
594 command->Current_done = Current_done;
595 command->Current_SCpnt = Current_SCpnt;
596 list_add_tail(&command->list, &scsi_id->cmd_orb_inuse);
598 SBP2_ERR("%s: no orbs available", __FUNCTION__);
600 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
604 static void sbp2util_free_command_dma(struct sbp2_command_info *command)
606 struct scsi_id_instance_data *scsi_id =
607 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
608 struct hpsb_host *host;
611 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
615 host = scsi_id->ud->ne->host;
617 if (command->cmd_dma) {
618 if (command->dma_type == CMD_DMA_SINGLE)
619 pci_unmap_single(host->pdev, command->cmd_dma,
620 command->dma_size, command->dma_dir);
621 else if (command->dma_type == CMD_DMA_PAGE)
622 pci_unmap_page(host->pdev, command->cmd_dma,
623 command->dma_size, command->dma_dir);
624 /* XXX: Check for CMD_DMA_NONE bug */
625 command->dma_type = CMD_DMA_NONE;
626 command->cmd_dma = 0;
629 if (command->sge_buffer) {
630 pci_unmap_sg(host->pdev, command->sge_buffer,
631 command->dma_size, command->dma_dir);
632 command->sge_buffer = NULL;
637 * This function moves a command to the completed orb list.
638 * Must be called with scsi_id->cmd_orb_lock held.
640 static void sbp2util_mark_command_completed(
641 struct scsi_id_instance_data *scsi_id,
642 struct sbp2_command_info *command)
644 list_del(&command->list);
645 sbp2util_free_command_dma(command);
646 list_add_tail(&command->list, &scsi_id->cmd_orb_completed);
650 * Is scsi_id valid? Is the 1394 node still present?
652 static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
654 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
657 /*********************************************
658 * IEEE-1394 core driver stack related section
659 *********************************************/
661 static int sbp2_probe(struct device *dev)
663 struct unit_directory *ud;
664 struct scsi_id_instance_data *scsi_id;
666 ud = container_of(dev, struct unit_directory, device);
668 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
670 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
673 scsi_id = sbp2_alloc_device(ud);
678 sbp2_parse_unit_directory(scsi_id, ud);
680 return sbp2_start_device(scsi_id);
683 static int sbp2_remove(struct device *dev)
685 struct unit_directory *ud;
686 struct scsi_id_instance_data *scsi_id;
687 struct scsi_device *sdev;
689 ud = container_of(dev, struct unit_directory, device);
690 scsi_id = ud->device.driver_data;
694 if (scsi_id->scsi_host) {
695 /* Get rid of enqueued commands if there is no chance to
697 if (!sbp2util_node_is_available(scsi_id))
698 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
699 /* scsi_remove_device() may trigger shutdown functions of SCSI
700 * highlevel drivers which would deadlock if blocked. */
701 atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN);
702 scsi_unblock_requests(scsi_id->scsi_host);
704 sdev = scsi_id->sdev;
706 scsi_id->sdev = NULL;
707 scsi_remove_device(sdev);
710 sbp2_logout_device(scsi_id);
711 sbp2_remove_device(scsi_id);
716 static int sbp2_update(struct unit_directory *ud)
718 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
720 if (sbp2_reconnect_device(scsi_id)) {
721 /* Reconnect has failed. Perhaps we didn't reconnect fast
722 * enough. Try a regular login, but first log out just in
723 * case of any weirdness. */
724 sbp2_logout_device(scsi_id);
726 if (sbp2_login_device(scsi_id)) {
727 /* Login failed too, just fail, and the backend
728 * will call our sbp2_remove for us */
729 SBP2_ERR("Failed to reconnect to sbp2 device!");
734 sbp2_set_busy_timeout(scsi_id);
735 sbp2_agent_reset(scsi_id, 1);
736 sbp2_max_speed_and_size(scsi_id);
738 /* Complete any pending commands with busy (so they get retried)
739 * and remove them from our queue. */
740 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
742 /* Accept new commands unless there was another bus reset in the
744 if (hpsb_node_entry_valid(scsi_id->ne)) {
745 atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING);
746 scsi_unblock_requests(scsi_id->scsi_host);
751 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
753 struct sbp2_fwhost_info *hi;
754 struct Scsi_Host *scsi_host = NULL;
755 struct scsi_id_instance_data *scsi_id = NULL;
757 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
759 SBP2_ERR("failed to create scsi_id");
763 scsi_id->ne = ud->ne;
765 scsi_id->speed_code = IEEE1394_SPEED_100;
766 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
767 scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
768 INIT_LIST_HEAD(&scsi_id->cmd_orb_inuse);
769 INIT_LIST_HEAD(&scsi_id->cmd_orb_completed);
770 INIT_LIST_HEAD(&scsi_id->scsi_list);
771 spin_lock_init(&scsi_id->cmd_orb_lock);
772 atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING);
773 INIT_WORK(&scsi_id->protocol_work, NULL);
775 ud->device.driver_data = scsi_id;
777 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
779 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
781 SBP2_ERR("failed to allocate hostinfo");
784 hi->host = ud->ne->host;
785 INIT_LIST_HEAD(&hi->scsi_ids);
787 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
788 /* Handle data movement if physical dma is not
789 * enabled or not supported on host controller */
790 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
792 0x0ULL, 0xfffffffcULL)) {
793 SBP2_ERR("failed to register lower 4GB address range");
799 /* Prevent unloading of the 1394 host */
800 if (!try_module_get(hi->host->driver->owner)) {
801 SBP2_ERR("failed to get a reference on 1394 host driver");
807 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
809 /* Register the status FIFO address range. We could use the same FIFO
810 * for targets at different nodes. However we need different FIFOs per
811 * target in order to support multi-unit devices.
812 * The FIFO is located out of the local host controller's physical range
813 * but, if possible, within the posted write area. Status writes will
814 * then be performed as unified transactions. This slightly reduces
815 * bandwidth usage, and some Prolific based devices seem to require it.
817 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
818 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
819 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
820 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
821 if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
822 SBP2_ERR("failed to allocate status FIFO address range");
826 scsi_host = scsi_host_alloc(&sbp2_shost_template,
827 sizeof(unsigned long));
829 SBP2_ERR("failed to register scsi host");
833 scsi_host->hostdata[0] = (unsigned long)scsi_id;
835 if (!scsi_add_host(scsi_host, &ud->device)) {
836 scsi_id->scsi_host = scsi_host;
840 SBP2_ERR("failed to add scsi host");
841 scsi_host_put(scsi_host);
844 sbp2_remove_device(scsi_id);
848 static void sbp2_host_reset(struct hpsb_host *host)
850 struct sbp2_fwhost_info *hi;
851 struct scsi_id_instance_data *scsi_id;
853 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
856 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
857 if (likely(atomic_read(&scsi_id->state) !=
858 SBP2LU_STATE_IN_SHUTDOWN)) {
859 atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET);
860 scsi_block_requests(scsi_id->scsi_host);
864 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
866 struct sbp2_fwhost_info *hi = scsi_id->hi;
869 scsi_id->login_response =
870 pci_alloc_consistent(hi->host->pdev,
871 sizeof(struct sbp2_login_response),
872 &scsi_id->login_response_dma);
873 if (!scsi_id->login_response)
876 scsi_id->query_logins_orb =
877 pci_alloc_consistent(hi->host->pdev,
878 sizeof(struct sbp2_query_logins_orb),
879 &scsi_id->query_logins_orb_dma);
880 if (!scsi_id->query_logins_orb)
883 scsi_id->query_logins_response =
884 pci_alloc_consistent(hi->host->pdev,
885 sizeof(struct sbp2_query_logins_response),
886 &scsi_id->query_logins_response_dma);
887 if (!scsi_id->query_logins_response)
890 scsi_id->reconnect_orb =
891 pci_alloc_consistent(hi->host->pdev,
892 sizeof(struct sbp2_reconnect_orb),
893 &scsi_id->reconnect_orb_dma);
894 if (!scsi_id->reconnect_orb)
897 scsi_id->logout_orb =
898 pci_alloc_consistent(hi->host->pdev,
899 sizeof(struct sbp2_logout_orb),
900 &scsi_id->logout_orb_dma);
901 if (!scsi_id->logout_orb)
905 pci_alloc_consistent(hi->host->pdev,
906 sizeof(struct sbp2_login_orb),
907 &scsi_id->login_orb_dma);
908 if (!scsi_id->login_orb)
911 if (sbp2util_create_command_orb_pool(scsi_id)) {
912 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
913 sbp2_remove_device(scsi_id);
917 /* Wait a second before trying to log in. Previously logged in
918 * initiators need a chance to reconnect. */
919 if (msleep_interruptible(1000)) {
920 sbp2_remove_device(scsi_id);
924 if (sbp2_login_device(scsi_id)) {
925 sbp2_remove_device(scsi_id);
929 sbp2_set_busy_timeout(scsi_id);
930 sbp2_agent_reset(scsi_id, 1);
931 sbp2_max_speed_and_size(scsi_id);
933 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
935 SBP2_ERR("scsi_add_device failed");
936 sbp2_logout_device(scsi_id);
937 sbp2_remove_device(scsi_id);
944 SBP2_ERR("Could not allocate memory for scsi_id");
945 sbp2_remove_device(scsi_id);
949 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
951 struct sbp2_fwhost_info *hi;
958 if (scsi_id->scsi_host) {
959 scsi_remove_host(scsi_id->scsi_host);
960 scsi_host_put(scsi_id->scsi_host);
962 flush_scheduled_work();
963 sbp2util_remove_command_orb_pool(scsi_id);
965 list_del(&scsi_id->scsi_list);
967 if (scsi_id->login_response)
968 pci_free_consistent(hi->host->pdev,
969 sizeof(struct sbp2_login_response),
970 scsi_id->login_response,
971 scsi_id->login_response_dma);
972 if (scsi_id->login_orb)
973 pci_free_consistent(hi->host->pdev,
974 sizeof(struct sbp2_login_orb),
976 scsi_id->login_orb_dma);
977 if (scsi_id->reconnect_orb)
978 pci_free_consistent(hi->host->pdev,
979 sizeof(struct sbp2_reconnect_orb),
980 scsi_id->reconnect_orb,
981 scsi_id->reconnect_orb_dma);
982 if (scsi_id->logout_orb)
983 pci_free_consistent(hi->host->pdev,
984 sizeof(struct sbp2_logout_orb),
986 scsi_id->logout_orb_dma);
987 if (scsi_id->query_logins_orb)
988 pci_free_consistent(hi->host->pdev,
989 sizeof(struct sbp2_query_logins_orb),
990 scsi_id->query_logins_orb,
991 scsi_id->query_logins_orb_dma);
992 if (scsi_id->query_logins_response)
993 pci_free_consistent(hi->host->pdev,
994 sizeof(struct sbp2_query_logins_response),
995 scsi_id->query_logins_response,
996 scsi_id->query_logins_response_dma);
998 if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
999 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1000 scsi_id->status_fifo_addr);
1002 scsi_id->ud->device.driver_data = NULL;
1005 module_put(hi->host->driver->owner);
1010 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1012 * Deal with write requests on adapters which do not support physical DMA or
1013 * have it switched off.
1015 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1016 int destid, quadlet_t *data, u64 addr,
1017 size_t length, u16 flags)
1019 memcpy(bus_to_virt((u32) addr), data, length);
1020 return RCODE_COMPLETE;
1024 * Deal with read requests on adapters which do not support physical DMA or
1025 * have it switched off.
1027 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1028 quadlet_t *data, u64 addr, size_t length,
1031 memcpy(data, bus_to_virt((u32) addr), length);
1032 return RCODE_COMPLETE;
1036 /**************************************
1037 * SBP-2 protocol related section
1038 **************************************/
1040 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1042 struct sbp2_fwhost_info *hi = scsi_id->hi;
1047 scsi_id->query_logins_orb->reserved1 = 0x0;
1048 scsi_id->query_logins_orb->reserved2 = 0x0;
1050 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1051 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1053 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1054 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1055 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->lun);
1057 scsi_id->query_logins_orb->reserved_resp_length =
1058 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1060 scsi_id->query_logins_orb->status_fifo_hi =
1061 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1062 scsi_id->query_logins_orb->status_fifo_lo =
1063 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1065 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1067 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1069 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1070 data[1] = scsi_id->query_logins_orb_dma;
1071 sbp2util_cpu_to_be32_buffer(data, 8);
1073 hpsb_node_write(scsi_id->ne, scsi_id->management_agent_addr, data, 8);
1075 if (sbp2util_access_timeout(scsi_id, 2*HZ)) {
1076 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1080 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1081 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1085 if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) {
1086 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1090 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1092 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1093 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1095 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1096 SBP2_INFO("Number of active logins: %d", active_logins);
1098 if (active_logins >= max_logins) {
1105 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1107 struct sbp2_fwhost_info *hi = scsi_id->hi;
1110 if (!scsi_id->login_orb)
1113 if (!sbp2_exclusive_login && sbp2_query_logins(scsi_id)) {
1114 SBP2_INFO("Device does not support any more concurrent logins");
1118 /* assume no password */
1119 scsi_id->login_orb->password_hi = 0;
1120 scsi_id->login_orb->password_lo = 0;
1122 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1123 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1124 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1126 /* one second reconnect time */
1127 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1128 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1129 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1130 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->lun);
1132 scsi_id->login_orb->passwd_resp_lengths =
1133 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1135 scsi_id->login_orb->status_fifo_hi =
1136 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1137 scsi_id->login_orb->status_fifo_lo =
1138 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1140 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1142 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1144 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1145 data[1] = scsi_id->login_orb_dma;
1146 sbp2util_cpu_to_be32_buffer(data, 8);
1148 hpsb_node_write(scsi_id->ne, scsi_id->management_agent_addr, data, 8);
1150 /* wait up to 20 seconds for login status */
1151 if (sbp2util_access_timeout(scsi_id, 20*HZ)) {
1152 SBP2_ERR("Error logging into SBP-2 device - timed out");
1156 /* make sure that the returned status matches the login ORB */
1157 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1158 SBP2_ERR("Error logging into SBP-2 device - timed out");
1162 if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) {
1163 SBP2_ERR("Error logging into SBP-2 device - failed");
1167 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1168 scsi_id->command_block_agent_addr =
1169 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1170 scsi_id->command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1171 scsi_id->command_block_agent_addr &= 0x0000ffffffffffffULL;
1173 SBP2_INFO("Logged into SBP-2 device");
1177 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1179 struct sbp2_fwhost_info *hi = scsi_id->hi;
1183 scsi_id->logout_orb->reserved1 = 0x0;
1184 scsi_id->logout_orb->reserved2 = 0x0;
1185 scsi_id->logout_orb->reserved3 = 0x0;
1186 scsi_id->logout_orb->reserved4 = 0x0;
1188 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1189 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1190 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1192 scsi_id->logout_orb->reserved5 = 0x0;
1193 scsi_id->logout_orb->status_fifo_hi =
1194 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1195 scsi_id->logout_orb->status_fifo_lo =
1196 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1198 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1200 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1201 data[1] = scsi_id->logout_orb_dma;
1202 sbp2util_cpu_to_be32_buffer(data, 8);
1204 error = hpsb_node_write(scsi_id->ne,
1205 scsi_id->management_agent_addr, data, 8);
1209 /* wait up to 1 second for the device to complete logout */
1210 if (sbp2util_access_timeout(scsi_id, HZ))
1213 SBP2_INFO("Logged out of SBP-2 device");
1217 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1219 struct sbp2_fwhost_info *hi = scsi_id->hi;
1223 scsi_id->reconnect_orb->reserved1 = 0x0;
1224 scsi_id->reconnect_orb->reserved2 = 0x0;
1225 scsi_id->reconnect_orb->reserved3 = 0x0;
1226 scsi_id->reconnect_orb->reserved4 = 0x0;
1228 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1229 scsi_id->reconnect_orb->login_ID_misc |=
1230 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1231 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1233 scsi_id->reconnect_orb->reserved5 = 0x0;
1234 scsi_id->reconnect_orb->status_fifo_hi =
1235 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1236 scsi_id->reconnect_orb->status_fifo_lo =
1237 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1239 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1241 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1242 data[1] = scsi_id->reconnect_orb_dma;
1243 sbp2util_cpu_to_be32_buffer(data, 8);
1245 error = hpsb_node_write(scsi_id->ne,
1246 scsi_id->management_agent_addr, data, 8);
1250 /* wait up to 1 second for reconnect status */
1251 if (sbp2util_access_timeout(scsi_id, HZ)) {
1252 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1256 /* make sure that the returned status matches the reconnect ORB */
1257 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1258 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1262 if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) {
1263 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1267 SBP2_INFO("Reconnected to SBP-2 device");
1272 * Set the target node's Single Phase Retry limit. Affects the target's retry
1273 * behaviour if our node is too busy to accept requests.
1275 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1279 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1280 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1281 SBP2_ERR("%s error", __FUNCTION__);
1285 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1286 struct unit_directory *ud)
1288 struct csr1212_keyval *kv;
1289 struct csr1212_dentry *dentry;
1290 u64 management_agent_addr;
1291 u32 unit_characteristics, firmware_revision;
1292 unsigned workarounds;
1295 management_agent_addr = 0;
1296 unit_characteristics = 0;
1297 firmware_revision = 0;
1299 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1300 switch (kv->key.id) {
1301 case CSR1212_KV_ID_DEPENDENT_INFO:
1302 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
1303 management_agent_addr =
1304 CSR1212_REGISTER_SPACE_BASE +
1305 (kv->value.csr_offset << 2);
1307 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
1309 ORB_SET_LUN(kv->value.immediate);
1312 case SBP2_UNIT_CHARACTERISTICS_KEY:
1313 /* FIXME: This is ignored so far.
1314 * See SBP-2 clause 7.4.8. */
1315 unit_characteristics = kv->value.immediate;
1318 case SBP2_FIRMWARE_REVISION_KEY:
1319 firmware_revision = kv->value.immediate;
1323 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1324 * Its "ordered" bit has consequences for command ORB
1325 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1330 workarounds = sbp2_default_workarounds;
1332 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1333 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1334 if (sbp2_workarounds_table[i].firmware_revision &&
1335 sbp2_workarounds_table[i].firmware_revision !=
1336 (firmware_revision & 0xffff00))
1338 if (sbp2_workarounds_table[i].model_id &&
1339 sbp2_workarounds_table[i].model_id != ud->model_id)
1341 workarounds |= sbp2_workarounds_table[i].workarounds;
1346 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1347 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1348 " model_id 0x%06x)",
1349 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1350 workarounds, firmware_revision,
1351 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1354 /* We would need one SCSI host template for each target to adjust
1355 * max_sectors on the fly, therefore warn only. */
1356 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1357 (sbp2_max_sectors * 512) > (128 * 1024))
1358 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1359 "max transfer size. WARNING: Current max_sectors "
1360 "setting is larger than 128KB (%d sectors)",
1361 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1364 /* If this is a logical unit directory entry, process the parent
1365 * to get the values. */
1366 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1367 struct unit_directory *parent_ud =
1368 container_of(ud->device.parent, struct unit_directory, device);
1369 sbp2_parse_unit_directory(scsi_id, parent_ud);
1371 scsi_id->management_agent_addr = management_agent_addr;
1372 scsi_id->workarounds = workarounds;
1373 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1374 scsi_id->lun = ORB_SET_LUN(ud->lun);
1378 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1381 * This function is called in order to determine the max speed and packet
1382 * size we can use in our ORBs. Note, that we (the driver and host) only
1383 * initiate the transaction. The SBP-2 device actually transfers the data
1384 * (by reading from the DMA area we tell it). This means that the SBP-2
1385 * device decides the actual maximum data it can transfer. We just tell it
1386 * the speed that it needs to use, and the max_rec the host supports, and
1387 * it takes care of the rest.
1389 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1391 struct sbp2_fwhost_info *hi = scsi_id->hi;
1394 scsi_id->speed_code =
1395 hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)];
1397 if (scsi_id->speed_code > sbp2_max_speed) {
1398 scsi_id->speed_code = sbp2_max_speed;
1399 SBP2_INFO("Reducing speed to %s",
1400 hpsb_speedto_str[sbp2_max_speed]);
1403 /* Payload size is the lesser of what our speed supports and what
1404 * our host supports. */
1405 payload = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1406 (u8) (hi->host->csr.max_rec - 1));
1408 /* If physical DMA is off, work around limitation in ohci1394:
1409 * packet size must not exceed PAGE_SIZE */
1410 if (scsi_id->ne->host->low_addr_space < (1ULL << 32))
1411 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1415 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1416 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1417 hpsb_speedto_str[scsi_id->speed_code],
1418 SBP2_PAYLOAD_TO_BYTES(payload));
1420 scsi_id->max_payload_size = payload;
1424 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1429 unsigned long flags;
1431 /* cancel_delayed_work(&scsi_id->protocol_work); */
1433 flush_scheduled_work();
1435 data = ntohl(SBP2_AGENT_RESET_DATA);
1436 addr = scsi_id->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1439 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1441 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1444 SBP2_ERR("hpsb_node_write failed.\n");
1448 /* make sure that the ORB_POINTER is written on next command */
1449 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
1450 scsi_id->last_orb = NULL;
1451 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
1456 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1457 struct sbp2_fwhost_info *hi,
1458 struct sbp2_command_info *command,
1459 unsigned int scsi_use_sg,
1460 struct scatterlist *sgpnt,
1462 enum dma_data_direction dma_dir)
1464 command->dma_dir = dma_dir;
1465 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1466 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1468 /* special case if only one element (and less than 64KB in size) */
1469 if ((scsi_use_sg == 1) &&
1470 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1472 command->dma_size = sgpnt[0].length;
1473 command->dma_type = CMD_DMA_PAGE;
1474 command->cmd_dma = pci_map_page(hi->host->pdev,
1480 orb->data_descriptor_lo = command->cmd_dma;
1481 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1484 struct sbp2_unrestricted_page_table *sg_element =
1485 &command->scatter_gather_element[0];
1486 u32 sg_count, sg_len;
1488 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1491 command->dma_size = scsi_use_sg;
1492 command->sge_buffer = sgpnt;
1494 /* use page tables (s/g) */
1495 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1496 orb->data_descriptor_lo = command->sge_dma;
1498 /* loop through and fill out our SBP-2 page tables
1499 * (and split up anything too large) */
1500 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1501 sg_len = sg_dma_len(sgpnt);
1502 sg_addr = sg_dma_address(sgpnt);
1504 sg_element[sg_count].segment_base_lo = sg_addr;
1505 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1506 sg_element[sg_count].length_segment_base_hi =
1507 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1508 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1509 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1511 sg_element[sg_count].length_segment_base_hi =
1512 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1519 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1521 sbp2util_cpu_to_be32_buffer(sg_element,
1522 (sizeof(struct sbp2_unrestricted_page_table)) *
1527 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1528 struct sbp2_fwhost_info *hi,
1529 struct sbp2_command_info *command,
1530 struct scatterlist *sgpnt,
1532 unsigned int scsi_request_bufflen,
1533 void *scsi_request_buffer,
1534 enum dma_data_direction dma_dir)
1536 command->dma_dir = dma_dir;
1537 command->dma_size = scsi_request_bufflen;
1538 command->dma_type = CMD_DMA_SINGLE;
1539 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1540 command->dma_size, command->dma_dir);
1541 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1542 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1544 /* handle case where we get a command w/o s/g enabled
1545 * (but check for transfers larger than 64K) */
1546 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1548 orb->data_descriptor_lo = command->cmd_dma;
1549 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1552 /* The buffer is too large. Turn this into page tables. */
1554 struct sbp2_unrestricted_page_table *sg_element =
1555 &command->scatter_gather_element[0];
1556 u32 sg_count, sg_len;
1559 orb->data_descriptor_lo = command->sge_dma;
1560 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1562 /* fill out our SBP-2 page tables; split up the large buffer */
1564 sg_len = scsi_request_bufflen;
1565 sg_addr = command->cmd_dma;
1567 sg_element[sg_count].segment_base_lo = sg_addr;
1568 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1569 sg_element[sg_count].length_segment_base_hi =
1570 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1571 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1572 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1574 sg_element[sg_count].length_segment_base_hi =
1575 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1581 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1583 sbp2util_cpu_to_be32_buffer(sg_element,
1584 (sizeof(struct sbp2_unrestricted_page_table)) *
1589 static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1590 struct sbp2_command_info *command,
1592 unsigned int scsi_use_sg,
1593 unsigned int scsi_request_bufflen,
1594 void *scsi_request_buffer,
1595 enum dma_data_direction dma_dir)
1597 struct sbp2_fwhost_info *hi = scsi_id->hi;
1598 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1599 struct sbp2_command_orb *command_orb = &command->command_orb;
1603 * Set-up our command ORB.
1605 * NOTE: We're doing unrestricted page tables (s/g), as this is
1606 * best performance (at least with the devices I have). This means
1607 * that data_size becomes the number of s/g elements, and
1608 * page_size should be zero (for unrestricted).
1610 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1611 command_orb->next_ORB_lo = 0x0;
1612 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1613 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1614 command_orb->misc |= ORB_SET_NOTIFY(1);
1616 if (dma_dir == DMA_NONE)
1617 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1618 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1619 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1620 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1621 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1623 SBP2_INFO("Falling back to DMA_NONE");
1624 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1627 /* set up our page table stuff */
1628 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1629 command_orb->data_descriptor_hi = 0x0;
1630 command_orb->data_descriptor_lo = 0x0;
1631 command_orb->misc |= ORB_SET_DIRECTION(1);
1632 } else if (scsi_use_sg)
1633 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1634 sgpnt, orb_direction, dma_dir);
1636 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1637 orb_direction, scsi_request_bufflen,
1638 scsi_request_buffer, dma_dir);
1640 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1642 memset(command_orb->cdb, 0, 12);
1643 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1646 static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1647 struct sbp2_command_info *command)
1649 struct sbp2_fwhost_info *hi = scsi_id->hi;
1650 struct sbp2_command_orb *command_orb = &command->command_orb;
1651 struct sbp2_command_orb *last_orb;
1652 dma_addr_t last_orb_dma;
1653 u64 addr = scsi_id->command_block_agent_addr;
1656 unsigned long flags;
1658 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1659 sizeof(struct sbp2_command_orb),
1661 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1662 sizeof(command->scatter_gather_element),
1663 PCI_DMA_BIDIRECTIONAL);
1665 /* check to see if there are any previous orbs to use */
1666 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
1667 last_orb = scsi_id->last_orb;
1668 last_orb_dma = scsi_id->last_orb_dma;
1671 * last_orb == NULL means: We know that the target's fetch agent
1672 * is not active right now.
1674 addr += SBP2_ORB_POINTER_OFFSET;
1675 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1676 data[1] = command->command_orb_dma;
1677 sbp2util_cpu_to_be32_buffer(data, 8);
1681 * last_orb != NULL means: We know that the target's fetch agent
1682 * is (very probably) not dead or in reset state right now.
1683 * We have an ORB already sent that we can append a new one to.
1684 * The target's fetch agent may or may not have read this
1687 pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma,
1688 sizeof(struct sbp2_command_orb),
1690 last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma);
1692 /* Tells hardware that this pointer is valid */
1693 last_orb->next_ORB_hi = 0;
1694 pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma,
1695 sizeof(struct sbp2_command_orb),
1697 addr += SBP2_DOORBELL_OFFSET;
1701 scsi_id->last_orb = command_orb;
1702 scsi_id->last_orb_dma = command->command_orb_dma;
1703 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
1705 if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) {
1707 * sbp2util_node_write_no_wait failed. We certainly ran out
1708 * of transaction labels, perhaps just because there were no
1709 * context switches which gave khpsbpkt a chance to collect
1710 * free tlabels. Try again in non-atomic context. If necessary,
1711 * the workqueue job will sleep to guaranteedly get a tlabel.
1712 * We do not accept new commands until the job is over.
1714 scsi_block_requests(scsi_id->scsi_host);
1715 PREPARE_WORK(&scsi_id->protocol_work,
1716 last_orb ? sbp2util_write_doorbell:
1717 sbp2util_write_orb_pointer
1719 schedule_work(&scsi_id->protocol_work);
1723 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
1724 struct scsi_cmnd *SCpnt,
1725 void (*done)(struct scsi_cmnd *))
1727 unchar *cmd = (unchar *) SCpnt->cmnd;
1728 unsigned int request_bufflen = SCpnt->request_bufflen;
1729 struct sbp2_command_info *command;
1731 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
1735 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
1736 request_bufflen, SCpnt->request_buffer,
1737 SCpnt->sc_data_direction);
1738 sbp2_link_orb_command(scsi_id, command);
1744 * Translates SBP-2 status into SCSI sense data for check conditions
1746 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
1748 /* OK, it's pretty ugly... ;-) */
1749 sense_data[0] = 0x70;
1750 sense_data[1] = 0x0;
1751 sense_data[2] = sbp2_status[9];
1752 sense_data[3] = sbp2_status[12];
1753 sense_data[4] = sbp2_status[13];
1754 sense_data[5] = sbp2_status[14];
1755 sense_data[6] = sbp2_status[15];
1757 sense_data[8] = sbp2_status[16];
1758 sense_data[9] = sbp2_status[17];
1759 sense_data[10] = sbp2_status[18];
1760 sense_data[11] = sbp2_status[19];
1761 sense_data[12] = sbp2_status[10];
1762 sense_data[13] = sbp2_status[11];
1763 sense_data[14] = sbp2_status[20];
1764 sense_data[15] = sbp2_status[21];
1766 return sbp2_status[8] & 0x3f;
1769 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1770 int destid, quadlet_t *data, u64 addr,
1771 size_t length, u16 fl)
1773 struct sbp2_fwhost_info *hi;
1774 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
1775 struct scsi_cmnd *SCpnt = NULL;
1776 struct sbp2_status_block *sb;
1777 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
1778 struct sbp2_command_info *command;
1779 unsigned long flags;
1781 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1782 SBP2_ERR("Wrong size of status block");
1783 return RCODE_ADDRESS_ERROR;
1785 if (unlikely(!host)) {
1786 SBP2_ERR("host is NULL - this is bad!");
1787 return RCODE_ADDRESS_ERROR;
1789 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
1790 if (unlikely(!hi)) {
1791 SBP2_ERR("host info is NULL - this is bad!");
1792 return RCODE_ADDRESS_ERROR;
1795 /* Find the unit which wrote the status. */
1796 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
1797 if (scsi_id_tmp->ne->nodeid == nodeid &&
1798 scsi_id_tmp->status_fifo_addr == addr) {
1799 scsi_id = scsi_id_tmp;
1803 if (unlikely(!scsi_id)) {
1804 SBP2_ERR("scsi_id is NULL - device is gone?");
1805 return RCODE_ADDRESS_ERROR;
1808 /* Put response into scsi_id status fifo buffer. The first two bytes
1809 * come in big endian bit order. Often the target writes only a
1810 * truncated status block, minimally the first two quadlets. The rest
1811 * is implied to be zeros. */
1812 sb = &scsi_id->status_block;
1813 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1814 memcpy(sb, data, length);
1815 sbp2util_be32_to_cpu_buffer(sb, 8);
1817 /* Ignore unsolicited status. Handle command ORB status. */
1818 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
1821 command = sbp2util_find_command_for_orb(scsi_id,
1824 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
1825 sizeof(struct sbp2_command_orb),
1827 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
1828 sizeof(command->scatter_gather_element),
1829 PCI_DMA_BIDIRECTIONAL);
1830 /* Grab SCSI command pointers and check status. */
1832 * FIXME: If the src field in the status is 1, the ORB DMA must
1833 * not be reused until status for a subsequent ORB is received.
1835 SCpnt = command->Current_SCpnt;
1836 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
1837 sbp2util_mark_command_completed(scsi_id, command);
1838 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
1841 u32 h = sb->ORB_offset_hi_misc;
1842 u32 r = STATUS_GET_RESP(h);
1844 if (r != RESP_STATUS_REQUEST_COMPLETE) {
1845 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1846 r, STATUS_GET_SBP_STATUS(h));
1848 r == RESP_STATUS_TRANSPORT_FAILURE ?
1849 SBP2_SCSI_STATUS_BUSY :
1850 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
1853 if (STATUS_GET_LEN(h) > 1)
1854 scsi_status = sbp2_status_to_sense_data(
1855 (unchar *)sb, SCpnt->sense_buffer);
1857 if (STATUS_TEST_DEAD(h))
1858 sbp2_agent_reset(scsi_id, 0);
1861 /* Check here to see if there are no commands in-use. If there
1862 * are none, we know that the fetch agent left the active state
1863 * _and_ that we did not reactivate it yet. Therefore clear
1864 * last_orb so that next time we write directly to the
1865 * ORB_POINTER register. That way the fetch agent does not need
1866 * to refetch the next_ORB. */
1867 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
1868 if (list_empty(&scsi_id->cmd_orb_inuse))
1869 scsi_id->last_orb = NULL;
1870 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
1873 /* It's probably status after a management request. */
1874 if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) ||
1875 (sb->ORB_offset_lo == scsi_id->login_orb_dma) ||
1876 (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) ||
1877 (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) {
1878 scsi_id->access_complete = 1;
1879 wake_up_interruptible(&sbp2_access_wq);
1884 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
1885 command->Current_done);
1886 return RCODE_COMPLETE;
1889 /**************************************
1890 * SCSI interface related section
1891 **************************************/
1893 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1894 void (*done)(struct scsi_cmnd *))
1896 struct scsi_id_instance_data *scsi_id =
1897 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
1898 struct sbp2_fwhost_info *hi;
1899 int result = DID_NO_CONNECT << 16;
1901 if (unlikely(!sbp2util_node_is_available(scsi_id)))
1906 if (unlikely(!hi)) {
1907 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1911 /* Multiple units are currently represented to the SCSI core as separate
1912 * targets, not as one target with multiple LUs. Therefore return
1913 * selection time-out to any IO directed at non-zero LUNs. */
1914 if (unlikely(SCpnt->device->lun))
1917 /* handle the request sense command here (auto-request sense) */
1918 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
1919 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
1920 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
1921 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
1925 if (unlikely(!hpsb_node_entry_valid(scsi_id->ne))) {
1926 SBP2_ERR("Bus reset in progress - rejecting command");
1927 result = DID_BUS_BUSY << 16;
1931 /* Bidirectional commands are not yet implemented,
1932 * and unknown transfer direction not handled. */
1933 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
1934 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1935 result = DID_ERROR << 16;
1939 if (sbp2_send_command(scsi_id, SCpnt, done)) {
1940 SBP2_ERR("Error sending SCSI command");
1941 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
1947 SCpnt->result = result;
1952 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
1955 struct sbp2_fwhost_info *hi = scsi_id->hi;
1956 struct list_head *lh;
1957 struct sbp2_command_info *command;
1958 unsigned long flags;
1960 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
1961 while (!list_empty(&scsi_id->cmd_orb_inuse)) {
1962 lh = scsi_id->cmd_orb_inuse.next;
1963 command = list_entry(lh, struct sbp2_command_info, list);
1964 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
1965 sizeof(struct sbp2_command_orb),
1967 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
1968 sizeof(command->scatter_gather_element),
1969 PCI_DMA_BIDIRECTIONAL);
1970 sbp2util_mark_command_completed(scsi_id, command);
1971 if (command->Current_SCpnt) {
1972 command->Current_SCpnt->result = status << 16;
1973 command->Current_done(command->Current_SCpnt);
1976 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
1982 * Complete a regular SCSI command. Can be called in atomic context.
1984 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
1985 u32 scsi_status, struct scsi_cmnd *SCpnt,
1986 void (*done)(struct scsi_cmnd *))
1989 SBP2_ERR("SCpnt is NULL");
1993 switch (scsi_status) {
1994 case SBP2_SCSI_STATUS_GOOD:
1995 SCpnt->result = DID_OK << 16;
1998 case SBP2_SCSI_STATUS_BUSY:
1999 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2000 SCpnt->result = DID_BUS_BUSY << 16;
2003 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2004 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
2007 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2008 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2009 SCpnt->result = DID_NO_CONNECT << 16;
2010 scsi_print_command(SCpnt);
2013 case SBP2_SCSI_STATUS_CONDITION_MET:
2014 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2015 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2016 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2017 SCpnt->result = DID_ERROR << 16;
2018 scsi_print_command(SCpnt);
2022 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2023 SCpnt->result = DID_ERROR << 16;
2026 /* If a bus reset is in progress and there was an error, complete
2027 * the command as busy so that it will get retried. */
2028 if (!hpsb_node_entry_valid(scsi_id->ne)
2029 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2030 SBP2_ERR("Completing command with busy (bus reset)");
2031 SCpnt->result = DID_BUS_BUSY << 16;
2034 /* Tell the SCSI stack that we're done with this command. */
2038 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2040 struct scsi_id_instance_data *scsi_id =
2041 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2043 scsi_id->sdev = sdev;
2044 sdev->allow_restart = 1;
2046 if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2047 sdev->inquiry_len = 36;
2051 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2053 struct scsi_id_instance_data *scsi_id =
2054 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2056 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2057 sdev->use_10_for_rw = 1;
2059 if (sdev->type == TYPE_DISK &&
2060 scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2061 sdev->skip_ms_page_8 = 1;
2062 if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2063 sdev->fix_capacity = 1;
2067 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2069 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2074 * Called by scsi stack when something has really gone wrong.
2075 * Usually called when a command has timed-out for some reason.
2077 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2079 struct scsi_id_instance_data *scsi_id =
2080 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2081 struct sbp2_fwhost_info *hi = scsi_id->hi;
2082 struct sbp2_command_info *command;
2083 unsigned long flags;
2085 SBP2_INFO("aborting sbp2 command");
2086 scsi_print_command(SCpnt);
2088 if (sbp2util_node_is_available(scsi_id)) {
2089 sbp2_agent_reset(scsi_id, 1);
2091 /* Return a matching command structure to the free pool. */
2092 spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags);
2093 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2095 pci_dma_sync_single_for_cpu(hi->host->pdev,
2096 command->command_orb_dma,
2097 sizeof(struct sbp2_command_orb),
2099 pci_dma_sync_single_for_cpu(hi->host->pdev,
2101 sizeof(command->scatter_gather_element),
2102 PCI_DMA_BIDIRECTIONAL);
2103 sbp2util_mark_command_completed(scsi_id, command);
2104 if (command->Current_SCpnt) {
2105 command->Current_SCpnt->result = DID_ABORT << 16;
2106 command->Current_done(command->Current_SCpnt);
2109 spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags);
2111 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2118 * Called by scsi stack when something has really gone wrong.
2120 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2122 struct scsi_id_instance_data *scsi_id =
2123 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2125 SBP2_INFO("reset requested");
2127 if (sbp2util_node_is_available(scsi_id)) {
2128 SBP2_INFO("generating sbp2 fetch agent reset");
2129 sbp2_agent_reset(scsi_id, 1);
2135 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2136 struct device_attribute *attr,
2139 struct scsi_device *sdev;
2140 struct scsi_id_instance_data *scsi_id;
2142 if (!(sdev = to_scsi_device(dev)))
2145 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2148 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2149 scsi_id->ud->id, ORB_SET_LUN(scsi_id->lun));
2152 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2153 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2154 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2155 MODULE_LICENSE("GPL");
2157 static int sbp2_module_init(void)
2161 if (sbp2_serialize_io) {
2162 sbp2_shost_template.can_queue = 1;
2163 sbp2_shost_template.cmd_per_lun = 1;
2166 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2167 (sbp2_max_sectors * 512) > (128 * 1024))
2168 sbp2_max_sectors = 128 * 1024 / 512;
2169 sbp2_shost_template.max_sectors = sbp2_max_sectors;
2171 hpsb_register_highlevel(&sbp2_highlevel);
2172 ret = hpsb_register_protocol(&sbp2_driver);
2174 SBP2_ERR("Failed to register protocol");
2175 hpsb_unregister_highlevel(&sbp2_highlevel);
2181 static void __exit sbp2_module_exit(void)
2183 hpsb_unregister_protocol(&sbp2_driver);
2184 hpsb_unregister_highlevel(&sbp2_highlevel);
2187 module_init(sbp2_module_init);
2188 module_exit(sbp2_module_exit);