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 max_speed
= IEEE1394_SPEED_MAX
;
102 module_param(max_speed
, int, 0644);
103 MODULE_PARM_DESC(max_speed
, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
106 * Set serialize_io to 1 if you'd like only one scsi command sent
107 * down to us at a time (debugging). This might be necessary for very
108 * badly behaved sbp2 devices.
110 * TODO: Make this configurable per device.
112 static int serialize_io
= 1;
113 module_param(serialize_io
, int, 0444);
114 MODULE_PARM_DESC(serialize_io
, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
117 * Bump up max_sectors if you'd like to support very large sized
118 * transfers. Please note that some older sbp2 bridge chips are broken for
119 * transfers greater or equal to 128KB. Default is a value of 255
120 * sectors, or just under 128KB (at 512 byte sector size). I can note that
121 * the Oxsemi sbp2 chipsets have no problems supporting very large
124 static int max_sectors
= SBP2_MAX_SECTORS
;
125 module_param(max_sectors
, int, 0444);
126 MODULE_PARM_DESC(max_sectors
, "Change max sectors per I/O supported (default = "
127 __stringify(SBP2_MAX_SECTORS
) ")");
130 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
131 * do an exclusive login, as it's generally unsafe to have two hosts
132 * talking to a single sbp2 device at the same time (filesystem coherency,
133 * etc.). If you're running an sbp2 device that supports multiple logins,
134 * and you're either running read-only filesystems or some sort of special
135 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
136 * File System, or Lustre, then set exclusive_login to zero.
138 * So far only bridges from Oxford Semiconductor are known to support
139 * concurrent logins. Depending on firmware, four or two concurrent logins
140 * are possible on OXFW911 and newer Oxsemi bridges.
142 static int exclusive_login
= 1;
143 module_param(exclusive_login
, int, 0644);
144 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device (default = 1)");
147 * If any of the following workarounds is required for your device to work,
148 * please submit the kernel messages logged by sbp2 to the linux1394-devel
151 * - 128kB max transfer
152 * Limit transfer size. Necessary for some old bridges.
155 * When scsi_mod probes the device, let the inquiry command look like that
159 * Suppress sending of mode_sense for mode page 8 if the device pretends to
160 * support the SCSI Primary Block commands instead of Reduced Block Commands.
163 * Tell sd_mod to correct the last sector number reported by read_capacity.
164 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
165 * Don't use this with devices which don't have this bug.
167 * - override internal blacklist
168 * Instead of adding to the built-in blacklist, use only the workarounds
169 * specified in the module load parameter.
170 * Useful if a blacklist entry interfered with a non-broken device.
172 static int sbp2_default_workarounds
;
173 module_param_named(workarounds
, sbp2_default_workarounds
, int, 0644);
174 MODULE_PARM_DESC(workarounds
, "Work around device bugs (default = 0"
175 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS
)
176 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36
)
177 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8
)
178 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY
)
179 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE
)
180 ", or a combination)");
183 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
184 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
189 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*, u32
);
190 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*, u32
,
192 void (*)(struct scsi_cmnd
*));
193 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*);
194 static int sbp2_start_device(struct scsi_id_instance_data
*);
195 static void sbp2_remove_device(struct scsi_id_instance_data
*);
196 static int sbp2_login_device(struct scsi_id_instance_data
*);
197 static int sbp2_reconnect_device(struct scsi_id_instance_data
*);
198 static int sbp2_logout_device(struct scsi_id_instance_data
*);
199 static void sbp2_host_reset(struct hpsb_host
*);
200 static int sbp2_handle_status_write(struct hpsb_host
*, int, int, quadlet_t
*,
202 static int sbp2_agent_reset(struct scsi_id_instance_data
*, int);
203 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*,
204 struct unit_directory
*);
205 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*);
206 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*);
209 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
211 static struct hpsb_highlevel sbp2_highlevel
= {
212 .name
= SBP2_DEVICE_NAME
,
213 .host_reset
= sbp2_host_reset
,
216 static struct hpsb_address_ops sbp2_ops
= {
217 .write
= sbp2_handle_status_write
220 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
221 static int sbp2_handle_physdma_write(struct hpsb_host
*, int, int, quadlet_t
*,
223 static int sbp2_handle_physdma_read(struct hpsb_host
*, int, quadlet_t
*, u64
,
226 static struct hpsb_address_ops sbp2_physdma_ops
= {
227 .read
= sbp2_handle_physdma_read
,
228 .write
= sbp2_handle_physdma_write
,
234 * Interface to driver core and IEEE 1394 core
236 static struct ieee1394_device_id sbp2_id_table
[] = {
238 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
| IEEE1394_MATCH_VERSION
,
239 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
240 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff},
243 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
245 static int sbp2_probe(struct device
*);
246 static int sbp2_remove(struct device
*);
247 static int sbp2_update(struct unit_directory
*);
249 static struct hpsb_protocol_driver sbp2_driver
= {
250 .name
= "SBP2 Driver",
251 .id_table
= sbp2_id_table
,
252 .update
= sbp2_update
,
254 .name
= SBP2_DEVICE_NAME
,
255 .bus
= &ieee1394_bus_type
,
257 .remove
= sbp2_remove
,
263 * Interface to SCSI core
265 static int sbp2scsi_queuecommand(struct scsi_cmnd
*,
266 void (*)(struct scsi_cmnd
*));
267 static int sbp2scsi_abort(struct scsi_cmnd
*);
268 static int sbp2scsi_reset(struct scsi_cmnd
*);
269 static int sbp2scsi_slave_alloc(struct scsi_device
*);
270 static int sbp2scsi_slave_configure(struct scsi_device
*);
271 static void sbp2scsi_slave_destroy(struct scsi_device
*);
272 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*,
273 struct device_attribute
*, char *);
275 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
277 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
278 &dev_attr_ieee1394_id
,
282 static struct scsi_host_template scsi_driver_template
= {
283 .module
= THIS_MODULE
,
284 .name
= "SBP-2 IEEE-1394",
285 .proc_name
= SBP2_DEVICE_NAME
,
286 .queuecommand
= sbp2scsi_queuecommand
,
287 .eh_abort_handler
= sbp2scsi_abort
,
288 .eh_device_reset_handler
= sbp2scsi_reset
,
289 .slave_alloc
= sbp2scsi_slave_alloc
,
290 .slave_configure
= sbp2scsi_slave_configure
,
291 .slave_destroy
= sbp2scsi_slave_destroy
,
293 .sg_tablesize
= SG_ALL
,
294 .use_clustering
= ENABLE_CLUSTERING
,
295 .cmd_per_lun
= SBP2_MAX_CMDS
,
296 .can_queue
= SBP2_MAX_CMDS
,
298 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
303 * List of devices with known bugs.
305 * The firmware_revision field, masked with 0xffff00, is the best indicator
306 * for the type of bridge chip of a device. It yields a few false positives
307 * but this did not break correctly behaving devices so far.
309 static const struct {
310 u32 firmware_revision
;
312 unsigned workarounds
;
313 } sbp2_workarounds_table
[] = {
314 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
315 .firmware_revision
= 0x002800,
316 .model_id
= 0x001010,
317 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
|
318 SBP2_WORKAROUND_MODE_SENSE_8
,
320 /* Initio bridges, actually only needed for some older ones */ {
321 .firmware_revision
= 0x000200,
322 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
,
324 /* Symbios bridge */ {
325 .firmware_revision
= 0xa0b800,
326 .workarounds
= SBP2_WORKAROUND_128K_MAX_TRANS
,
329 * Note about the following Apple iPod blacklist entries:
331 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
332 * matching logic treats 0 as a wildcard, we cannot match this ID
333 * without rewriting the matching routine. Fortunately these iPods
334 * do not feature the read_capacity bug according to one report.
335 * Read_capacity behaviour as well as model_id could change due to
336 * Apple-supplied firmware updates though.
338 /* iPod 4th generation */ {
339 .firmware_revision
= 0x0a2700,
340 .model_id
= 0x000021,
341 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
344 .firmware_revision
= 0x0a2700,
345 .model_id
= 0x000023,
346 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
349 .firmware_revision
= 0x0a2700,
350 .model_id
= 0x00007e,
351 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
355 /**************************************
356 * General utility functions
357 **************************************/
361 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
363 static inline void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
367 for (length
= (length
>> 2); length
--; )
368 temp
[length
] = be32_to_cpu(temp
[length
]);
374 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
376 static inline void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
380 for (length
= (length
>> 2); length
--; )
381 temp
[length
] = cpu_to_be32(temp
[length
]);
385 #else /* BIG_ENDIAN */
386 /* Why waste the cpu cycles? */
387 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
388 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
391 static DECLARE_WAIT_QUEUE_HEAD(access_wq
);
394 * Waits for completion of an SBP-2 access request.
395 * Returns nonzero if timed out or prematurely interrupted.
397 static int sbp2util_access_timeout(struct scsi_id_instance_data
*scsi_id
,
400 long leftover
= wait_event_interruptible_timeout(
401 access_wq
, scsi_id
->access_complete
, timeout
);
403 scsi_id
->access_complete
= 0;
404 return leftover
<= 0;
407 static void sbp2_free_packet(struct hpsb_packet
*packet
)
409 hpsb_free_tlabel(packet
);
410 hpsb_free_packet(packet
);
414 * This is much like hpsb_node_write(), except it ignores the response
415 * subaction and returns immediately. Can be used from atomic context.
417 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
418 quadlet_t
*buffer
, size_t length
)
420 struct hpsb_packet
*packet
;
422 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
,
423 addr
, buffer
, length
);
427 hpsb_set_packet_complete_task(packet
,
428 (void (*)(void *))sbp2_free_packet
,
431 hpsb_node_fill_packet(ne
, packet
);
433 if (hpsb_send_packet(packet
) < 0) {
434 sbp2_free_packet(packet
);
441 static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data
*scsi_id
,
442 u64 offset
, quadlet_t
*data
, size_t len
)
445 * There is a small window after a bus reset within which the node
446 * entry's generation is current but the reconnect wasn't completed.
448 if (unlikely(atomic_read(&scsi_id
->state
) == SBP2LU_STATE_IN_RESET
))
451 if (hpsb_node_write(scsi_id
->ne
,
452 scsi_id
->sbp2_command_block_agent_addr
+ offset
,
454 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
456 * Now accept new SCSI commands, unless a bus reset happended during
459 if (likely(atomic_read(&scsi_id
->state
) != SBP2LU_STATE_IN_RESET
))
460 scsi_unblock_requests(scsi_id
->scsi_host
);
463 static void sbp2util_write_orb_pointer(struct work_struct
*work
)
467 data
[0] = ORB_SET_NODE_ID(
468 (container_of(work
, struct scsi_id_instance_data
, protocol_work
))->hi
->host
->node_id
);
469 data
[1] = (container_of(work
, struct scsi_id_instance_data
, protocol_work
))->last_orb_dma
;
470 sbp2util_cpu_to_be32_buffer(data
, 8);
471 sbp2util_notify_fetch_agent(container_of(work
, struct scsi_id_instance_data
, protocol_work
), SBP2_ORB_POINTER_OFFSET
, data
, 8);
474 static void sbp2util_write_doorbell(struct work_struct
*work
)
476 sbp2util_notify_fetch_agent(container_of(work
, struct scsi_id_instance_data
, protocol_work
), SBP2_DOORBELL_OFFSET
, NULL
, 4);
479 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
481 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
483 unsigned long flags
, orbs
;
484 struct sbp2_command_info
*command
;
486 orbs
= serialize_io
? 2 : SBP2_MAX_CMDS
;
488 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
489 for (i
= 0; i
< orbs
; i
++) {
490 command
= kzalloc(sizeof(*command
), GFP_ATOMIC
);
492 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
,
496 command
->command_orb_dma
=
497 pci_map_single(hi
->host
->pdev
, &command
->command_orb
,
498 sizeof(struct sbp2_command_orb
),
501 pci_map_single(hi
->host
->pdev
,
502 &command
->scatter_gather_element
,
503 sizeof(command
->scatter_gather_element
),
504 PCI_DMA_BIDIRECTIONAL
);
505 INIT_LIST_HEAD(&command
->list
);
506 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
508 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
512 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
514 struct hpsb_host
*host
= scsi_id
->hi
->host
;
515 struct list_head
*lh
, *next
;
516 struct sbp2_command_info
*command
;
519 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
520 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
521 list_for_each_safe(lh
, next
, &scsi_id
->sbp2_command_orb_completed
) {
522 command
= list_entry(lh
, struct sbp2_command_info
, list
);
523 pci_unmap_single(host
->pdev
, command
->command_orb_dma
,
524 sizeof(struct sbp2_command_orb
),
526 pci_unmap_single(host
->pdev
, command
->sge_dma
,
527 sizeof(command
->scatter_gather_element
),
528 PCI_DMA_BIDIRECTIONAL
);
532 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
537 * Finds the sbp2_command for a given outstanding command ORB.
538 * Only looks at the in-use list.
540 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
541 struct scsi_id_instance_data
*scsi_id
, dma_addr_t orb
)
543 struct sbp2_command_info
*command
;
546 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
547 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
548 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
) {
549 if (command
->command_orb_dma
== orb
) {
550 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
555 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
560 * Finds the sbp2_command for a given outstanding SCpnt.
561 * Only looks at the in-use list.
562 * Must be called with scsi_id->sbp2_command_orb_lock held.
564 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(
565 struct scsi_id_instance_data
*scsi_id
, void *SCpnt
)
567 struct sbp2_command_info
*command
;
569 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
))
570 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
)
571 if (command
->Current_SCpnt
== SCpnt
)
576 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
577 struct scsi_id_instance_data
*scsi_id
,
578 struct scsi_cmnd
*Current_SCpnt
,
579 void (*Current_done
)(struct scsi_cmnd
*))
581 struct list_head
*lh
;
582 struct sbp2_command_info
*command
= NULL
;
585 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
586 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
587 lh
= scsi_id
->sbp2_command_orb_completed
.next
;
589 command
= list_entry(lh
, struct sbp2_command_info
, list
);
590 command
->Current_done
= Current_done
;
591 command
->Current_SCpnt
= Current_SCpnt
;
592 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_inuse
);
594 SBP2_ERR("%s: no orbs available", __FUNCTION__
);
596 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
600 static void sbp2util_free_command_dma(struct sbp2_command_info
*command
)
602 struct scsi_id_instance_data
*scsi_id
=
603 (struct scsi_id_instance_data
*)command
->Current_SCpnt
->device
->host
->hostdata
[0];
604 struct hpsb_host
*host
;
607 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__
);
611 host
= scsi_id
->ud
->ne
->host
;
613 if (command
->cmd_dma
) {
614 if (command
->dma_type
== CMD_DMA_SINGLE
)
615 pci_unmap_single(host
->pdev
, command
->cmd_dma
,
616 command
->dma_size
, command
->dma_dir
);
617 else if (command
->dma_type
== CMD_DMA_PAGE
)
618 pci_unmap_page(host
->pdev
, command
->cmd_dma
,
619 command
->dma_size
, command
->dma_dir
);
620 /* XXX: Check for CMD_DMA_NONE bug */
621 command
->dma_type
= CMD_DMA_NONE
;
622 command
->cmd_dma
= 0;
625 if (command
->sge_buffer
) {
626 pci_unmap_sg(host
->pdev
, command
->sge_buffer
,
627 command
->dma_size
, command
->dma_dir
);
628 command
->sge_buffer
= NULL
;
633 * This function moves a command to the completed orb list.
634 * Must be called with scsi_id->sbp2_command_orb_lock held.
636 static void sbp2util_mark_command_completed(
637 struct scsi_id_instance_data
*scsi_id
,
638 struct sbp2_command_info
*command
)
640 list_del(&command
->list
);
641 sbp2util_free_command_dma(command
);
642 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
646 * Is scsi_id valid? Is the 1394 node still present?
648 static inline int sbp2util_node_is_available(struct scsi_id_instance_data
*scsi_id
)
650 return scsi_id
&& scsi_id
->ne
&& !scsi_id
->ne
->in_limbo
;
653 /*********************************************
654 * IEEE-1394 core driver stack related section
655 *********************************************/
657 static int sbp2_probe(struct device
*dev
)
659 struct unit_directory
*ud
;
660 struct scsi_id_instance_data
*scsi_id
;
662 ud
= container_of(dev
, struct unit_directory
, device
);
664 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
666 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
669 scsi_id
= sbp2_alloc_device(ud
);
674 sbp2_parse_unit_directory(scsi_id
, ud
);
676 return sbp2_start_device(scsi_id
);
679 static int sbp2_remove(struct device
*dev
)
681 struct unit_directory
*ud
;
682 struct scsi_id_instance_data
*scsi_id
;
683 struct scsi_device
*sdev
;
685 ud
= container_of(dev
, struct unit_directory
, device
);
686 scsi_id
= ud
->device
.driver_data
;
690 if (scsi_id
->scsi_host
) {
691 /* Get rid of enqueued commands if there is no chance to
693 if (!sbp2util_node_is_available(scsi_id
))
694 sbp2scsi_complete_all_commands(scsi_id
, DID_NO_CONNECT
);
695 /* scsi_remove_device() may trigger shutdown functions of SCSI
696 * highlevel drivers which would deadlock if blocked. */
697 atomic_set(&scsi_id
->state
, SBP2LU_STATE_IN_SHUTDOWN
);
698 scsi_unblock_requests(scsi_id
->scsi_host
);
700 sdev
= scsi_id
->sdev
;
702 scsi_id
->sdev
= NULL
;
703 scsi_remove_device(sdev
);
706 sbp2_logout_device(scsi_id
);
707 sbp2_remove_device(scsi_id
);
712 static int sbp2_update(struct unit_directory
*ud
)
714 struct scsi_id_instance_data
*scsi_id
= ud
->device
.driver_data
;
716 if (sbp2_reconnect_device(scsi_id
)) {
717 /* Reconnect has failed. Perhaps we didn't reconnect fast
718 * enough. Try a regular login, but first log out just in
719 * case of any weirdness. */
720 sbp2_logout_device(scsi_id
);
722 if (sbp2_login_device(scsi_id
)) {
723 /* Login failed too, just fail, and the backend
724 * will call our sbp2_remove for us */
725 SBP2_ERR("Failed to reconnect to sbp2 device!");
730 sbp2_set_busy_timeout(scsi_id
);
731 sbp2_agent_reset(scsi_id
, 1);
732 sbp2_max_speed_and_size(scsi_id
);
734 /* Complete any pending commands with busy (so they get retried)
735 * and remove them from our queue. */
736 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
738 /* Accept new commands unless there was another bus reset in the
740 if (hpsb_node_entry_valid(scsi_id
->ne
)) {
741 atomic_set(&scsi_id
->state
, SBP2LU_STATE_RUNNING
);
742 scsi_unblock_requests(scsi_id
->scsi_host
);
747 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
)
749 struct sbp2scsi_host_info
*hi
;
750 struct Scsi_Host
*scsi_host
= NULL
;
751 struct scsi_id_instance_data
*scsi_id
= NULL
;
753 scsi_id
= kzalloc(sizeof(*scsi_id
), GFP_KERNEL
);
755 SBP2_ERR("failed to create scsi_id");
759 scsi_id
->ne
= ud
->ne
;
761 scsi_id
->speed_code
= IEEE1394_SPEED_100
;
762 scsi_id
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
763 scsi_id
->status_fifo_addr
= CSR1212_INVALID_ADDR_SPACE
;
764 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_inuse
);
765 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_completed
);
766 INIT_LIST_HEAD(&scsi_id
->scsi_list
);
767 spin_lock_init(&scsi_id
->sbp2_command_orb_lock
);
768 atomic_set(&scsi_id
->state
, SBP2LU_STATE_RUNNING
);
769 INIT_WORK(&scsi_id
->protocol_work
, NULL
);
771 ud
->device
.driver_data
= scsi_id
;
773 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
775 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
, sizeof(*hi
));
777 SBP2_ERR("failed to allocate hostinfo");
780 hi
->host
= ud
->ne
->host
;
781 INIT_LIST_HEAD(&hi
->scsi_ids
);
783 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
784 /* Handle data movement if physical dma is not
785 * enabled or not supported on host controller */
786 if (!hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
,
788 0x0ULL
, 0xfffffffcULL
)) {
789 SBP2_ERR("failed to register lower 4GB address range");
795 /* Prevent unloading of the 1394 host */
796 if (!try_module_get(hi
->host
->driver
->owner
)) {
797 SBP2_ERR("failed to get a reference on 1394 host driver");
803 list_add_tail(&scsi_id
->scsi_list
, &hi
->scsi_ids
);
805 /* Register the status FIFO address range. We could use the same FIFO
806 * for targets at different nodes. However we need different FIFOs per
807 * target in order to support multi-unit devices.
808 * The FIFO is located out of the local host controller's physical range
809 * but, if possible, within the posted write area. Status writes will
810 * then be performed as unified transactions. This slightly reduces
811 * bandwidth usage, and some Prolific based devices seem to require it.
813 scsi_id
->status_fifo_addr
= hpsb_allocate_and_register_addrspace(
814 &sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
815 sizeof(struct sbp2_status_block
), sizeof(quadlet_t
),
816 ud
->ne
->host
->low_addr_space
, CSR1212_ALL_SPACE_END
);
817 if (scsi_id
->status_fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
818 SBP2_ERR("failed to allocate status FIFO address range");
822 scsi_host
= scsi_host_alloc(&scsi_driver_template
,
823 sizeof(unsigned long));
825 SBP2_ERR("failed to register scsi host");
829 scsi_host
->hostdata
[0] = (unsigned long)scsi_id
;
831 if (!scsi_add_host(scsi_host
, &ud
->device
)) {
832 scsi_id
->scsi_host
= scsi_host
;
836 SBP2_ERR("failed to add scsi host");
837 scsi_host_put(scsi_host
);
840 sbp2_remove_device(scsi_id
);
844 static void sbp2_host_reset(struct hpsb_host
*host
)
846 struct sbp2scsi_host_info
*hi
;
847 struct scsi_id_instance_data
*scsi_id
;
849 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
852 list_for_each_entry(scsi_id
, &hi
->scsi_ids
, scsi_list
)
853 if (likely(atomic_read(&scsi_id
->state
) !=
854 SBP2LU_STATE_IN_SHUTDOWN
)) {
855 atomic_set(&scsi_id
->state
, SBP2LU_STATE_IN_RESET
);
856 scsi_block_requests(scsi_id
->scsi_host
);
860 static int sbp2_start_device(struct scsi_id_instance_data
*scsi_id
)
862 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
865 scsi_id
->login_response
=
866 pci_alloc_consistent(hi
->host
->pdev
,
867 sizeof(struct sbp2_login_response
),
868 &scsi_id
->login_response_dma
);
869 if (!scsi_id
->login_response
)
872 scsi_id
->query_logins_orb
=
873 pci_alloc_consistent(hi
->host
->pdev
,
874 sizeof(struct sbp2_query_logins_orb
),
875 &scsi_id
->query_logins_orb_dma
);
876 if (!scsi_id
->query_logins_orb
)
879 scsi_id
->query_logins_response
=
880 pci_alloc_consistent(hi
->host
->pdev
,
881 sizeof(struct sbp2_query_logins_response
),
882 &scsi_id
->query_logins_response_dma
);
883 if (!scsi_id
->query_logins_response
)
886 scsi_id
->reconnect_orb
=
887 pci_alloc_consistent(hi
->host
->pdev
,
888 sizeof(struct sbp2_reconnect_orb
),
889 &scsi_id
->reconnect_orb_dma
);
890 if (!scsi_id
->reconnect_orb
)
893 scsi_id
->logout_orb
=
894 pci_alloc_consistent(hi
->host
->pdev
,
895 sizeof(struct sbp2_logout_orb
),
896 &scsi_id
->logout_orb_dma
);
897 if (!scsi_id
->logout_orb
)
901 pci_alloc_consistent(hi
->host
->pdev
,
902 sizeof(struct sbp2_login_orb
),
903 &scsi_id
->login_orb_dma
);
904 if (!scsi_id
->login_orb
)
907 if (sbp2util_create_command_orb_pool(scsi_id
)) {
908 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
909 sbp2_remove_device(scsi_id
);
913 /* Wait a second before trying to log in. Previously logged in
914 * initiators need a chance to reconnect. */
915 if (msleep_interruptible(1000)) {
916 sbp2_remove_device(scsi_id
);
920 if (sbp2_login_device(scsi_id
)) {
921 sbp2_remove_device(scsi_id
);
925 sbp2_set_busy_timeout(scsi_id
);
926 sbp2_agent_reset(scsi_id
, 1);
927 sbp2_max_speed_and_size(scsi_id
);
929 error
= scsi_add_device(scsi_id
->scsi_host
, 0, scsi_id
->ud
->id
, 0);
931 SBP2_ERR("scsi_add_device failed");
932 sbp2_logout_device(scsi_id
);
933 sbp2_remove_device(scsi_id
);
940 SBP2_ERR("Could not allocate memory for scsi_id");
941 sbp2_remove_device(scsi_id
);
945 static void sbp2_remove_device(struct scsi_id_instance_data
*scsi_id
)
947 struct sbp2scsi_host_info
*hi
;
954 if (scsi_id
->scsi_host
) {
955 scsi_remove_host(scsi_id
->scsi_host
);
956 scsi_host_put(scsi_id
->scsi_host
);
958 flush_scheduled_work();
959 sbp2util_remove_command_orb_pool(scsi_id
);
961 list_del(&scsi_id
->scsi_list
);
963 if (scsi_id
->login_response
)
964 pci_free_consistent(hi
->host
->pdev
,
965 sizeof(struct sbp2_login_response
),
966 scsi_id
->login_response
,
967 scsi_id
->login_response_dma
);
968 if (scsi_id
->login_orb
)
969 pci_free_consistent(hi
->host
->pdev
,
970 sizeof(struct sbp2_login_orb
),
972 scsi_id
->login_orb_dma
);
973 if (scsi_id
->reconnect_orb
)
974 pci_free_consistent(hi
->host
->pdev
,
975 sizeof(struct sbp2_reconnect_orb
),
976 scsi_id
->reconnect_orb
,
977 scsi_id
->reconnect_orb_dma
);
978 if (scsi_id
->logout_orb
)
979 pci_free_consistent(hi
->host
->pdev
,
980 sizeof(struct sbp2_logout_orb
),
982 scsi_id
->logout_orb_dma
);
983 if (scsi_id
->query_logins_orb
)
984 pci_free_consistent(hi
->host
->pdev
,
985 sizeof(struct sbp2_query_logins_orb
),
986 scsi_id
->query_logins_orb
,
987 scsi_id
->query_logins_orb_dma
);
988 if (scsi_id
->query_logins_response
)
989 pci_free_consistent(hi
->host
->pdev
,
990 sizeof(struct sbp2_query_logins_response
),
991 scsi_id
->query_logins_response
,
992 scsi_id
->query_logins_response_dma
);
994 if (scsi_id
->status_fifo_addr
!= CSR1212_INVALID_ADDR_SPACE
)
995 hpsb_unregister_addrspace(&sbp2_highlevel
, hi
->host
,
996 scsi_id
->status_fifo_addr
);
998 scsi_id
->ud
->device
.driver_data
= NULL
;
1001 module_put(hi
->host
->driver
->owner
);
1006 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1008 * Deal with write requests on adapters which do not support physical DMA or
1009 * have it switched off.
1011 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
,
1012 int destid
, quadlet_t
*data
, u64 addr
,
1013 size_t length
, u16 flags
)
1015 memcpy(bus_to_virt((u32
) addr
), data
, length
);
1016 return RCODE_COMPLETE
;
1020 * Deal with read requests on adapters which do not support physical DMA or
1021 * have it switched off.
1023 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
,
1024 quadlet_t
*data
, u64 addr
, size_t length
,
1027 memcpy(data
, bus_to_virt((u32
) addr
), length
);
1028 return RCODE_COMPLETE
;
1032 /**************************************
1033 * SBP-2 protocol related section
1034 **************************************/
1036 static int sbp2_query_logins(struct scsi_id_instance_data
*scsi_id
)
1038 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1043 scsi_id
->query_logins_orb
->reserved1
= 0x0;
1044 scsi_id
->query_logins_orb
->reserved2
= 0x0;
1046 scsi_id
->query_logins_orb
->query_response_lo
= scsi_id
->query_logins_response_dma
;
1047 scsi_id
->query_logins_orb
->query_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1049 scsi_id
->query_logins_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1050 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1051 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1053 scsi_id
->query_logins_orb
->reserved_resp_length
=
1054 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response
));
1056 scsi_id
->query_logins_orb
->status_fifo_hi
=
1057 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1058 scsi_id
->query_logins_orb
->status_fifo_lo
=
1059 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1061 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
));
1063 memset(scsi_id
->query_logins_response
, 0, sizeof(struct sbp2_query_logins_response
));
1065 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1066 data
[1] = scsi_id
->query_logins_orb_dma
;
1067 sbp2util_cpu_to_be32_buffer(data
, 8);
1069 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1071 if (sbp2util_access_timeout(scsi_id
, 2*HZ
)) {
1072 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1076 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->query_logins_orb_dma
) {
1077 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1081 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1082 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1086 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_response
, sizeof(struct sbp2_query_logins_response
));
1088 max_logins
= RESPONSE_GET_MAX_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1089 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins
);
1091 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1092 SBP2_INFO("Number of active logins: %d", active_logins
);
1094 if (active_logins
>= max_logins
) {
1101 static int sbp2_login_device(struct scsi_id_instance_data
*scsi_id
)
1103 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1106 if (!scsi_id
->login_orb
)
1109 if (!exclusive_login
) {
1110 if (sbp2_query_logins(scsi_id
)) {
1111 SBP2_INFO("Device does not support any more concurrent logins");
1116 /* assume no password */
1117 scsi_id
->login_orb
->password_hi
= 0;
1118 scsi_id
->login_orb
->password_lo
= 0;
1120 scsi_id
->login_orb
->login_response_lo
= scsi_id
->login_response_dma
;
1121 scsi_id
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1122 scsi_id
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1124 /* one second reconnect time */
1125 scsi_id
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0);
1126 scsi_id
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(exclusive_login
);
1127 scsi_id
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1128 scsi_id
->login_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1130 scsi_id
->login_orb
->passwd_resp_lengths
=
1131 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1133 scsi_id
->login_orb
->status_fifo_hi
=
1134 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1135 scsi_id
->login_orb
->status_fifo_lo
=
1136 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1138 sbp2util_cpu_to_be32_buffer(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
));
1140 memset(scsi_id
->login_response
, 0, sizeof(struct sbp2_login_response
));
1142 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1143 data
[1] = scsi_id
->login_orb_dma
;
1144 sbp2util_cpu_to_be32_buffer(data
, 8);
1146 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1148 /* wait up to 20 seconds for login status */
1149 if (sbp2util_access_timeout(scsi_id
, 20*HZ
)) {
1150 SBP2_ERR("Error logging into SBP-2 device - timed out");
1154 /* make sure that the returned status matches the login ORB */
1155 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->login_orb_dma
) {
1156 SBP2_ERR("Error logging into SBP-2 device - timed out");
1160 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1161 SBP2_ERR("Error logging into SBP-2 device - failed");
1165 sbp2util_cpu_to_be32_buffer(scsi_id
->login_response
, sizeof(struct sbp2_login_response
));
1166 scsi_id
->sbp2_command_block_agent_addr
=
1167 ((u64
)scsi_id
->login_response
->command_block_agent_hi
) << 32;
1168 scsi_id
->sbp2_command_block_agent_addr
|= ((u64
)scsi_id
->login_response
->command_block_agent_lo
);
1169 scsi_id
->sbp2_command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1171 SBP2_INFO("Logged into SBP-2 device");
1175 static int sbp2_logout_device(struct scsi_id_instance_data
*scsi_id
)
1177 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1181 scsi_id
->logout_orb
->reserved1
= 0x0;
1182 scsi_id
->logout_orb
->reserved2
= 0x0;
1183 scsi_id
->logout_orb
->reserved3
= 0x0;
1184 scsi_id
->logout_orb
->reserved4
= 0x0;
1186 scsi_id
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1187 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1188 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1190 scsi_id
->logout_orb
->reserved5
= 0x0;
1191 scsi_id
->logout_orb
->status_fifo_hi
=
1192 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1193 scsi_id
->logout_orb
->status_fifo_lo
=
1194 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1196 sbp2util_cpu_to_be32_buffer(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
));
1198 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1199 data
[1] = scsi_id
->logout_orb_dma
;
1200 sbp2util_cpu_to_be32_buffer(data
, 8);
1202 error
= hpsb_node_write(scsi_id
->ne
,
1203 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1207 /* wait up to 1 second for the device to complete logout */
1208 if (sbp2util_access_timeout(scsi_id
, HZ
))
1211 SBP2_INFO("Logged out of SBP-2 device");
1215 static int sbp2_reconnect_device(struct scsi_id_instance_data
*scsi_id
)
1217 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1221 scsi_id
->reconnect_orb
->reserved1
= 0x0;
1222 scsi_id
->reconnect_orb
->reserved2
= 0x0;
1223 scsi_id
->reconnect_orb
->reserved3
= 0x0;
1224 scsi_id
->reconnect_orb
->reserved4
= 0x0;
1226 scsi_id
->reconnect_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1227 scsi_id
->reconnect_orb
->login_ID_misc
|=
1228 ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1229 scsi_id
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1231 scsi_id
->reconnect_orb
->reserved5
= 0x0;
1232 scsi_id
->reconnect_orb
->status_fifo_hi
=
1233 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1234 scsi_id
->reconnect_orb
->status_fifo_lo
=
1235 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1237 sbp2util_cpu_to_be32_buffer(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
));
1239 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1240 data
[1] = scsi_id
->reconnect_orb_dma
;
1241 sbp2util_cpu_to_be32_buffer(data
, 8);
1243 error
= hpsb_node_write(scsi_id
->ne
,
1244 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1248 /* wait up to 1 second for reconnect status */
1249 if (sbp2util_access_timeout(scsi_id
, HZ
)) {
1250 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1254 /* make sure that the returned status matches the reconnect ORB */
1255 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->reconnect_orb_dma
) {
1256 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1260 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1261 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1265 SBP2_INFO("Reconnected to SBP-2 device");
1270 * Set the target node's Single Phase Retry limit. Affects the target's retry
1271 * behaviour if our node is too busy to accept requests.
1273 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*scsi_id
)
1277 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1278 if (hpsb_node_write(scsi_id
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4))
1279 SBP2_ERR("%s error", __FUNCTION__
);
1283 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*scsi_id
,
1284 struct unit_directory
*ud
)
1286 struct csr1212_keyval
*kv
;
1287 struct csr1212_dentry
*dentry
;
1288 u64 management_agent_addr
;
1289 u32 command_set_spec_id
, command_set
, unit_characteristics
,
1291 unsigned workarounds
;
1294 management_agent_addr
= 0x0;
1295 command_set_spec_id
= 0x0;
1297 unit_characteristics
= 0x0;
1298 firmware_revision
= 0x0;
1300 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1301 switch (kv
->key
.id
) {
1302 case CSR1212_KV_ID_DEPENDENT_INFO
:
1303 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
)
1304 management_agent_addr
=
1305 CSR1212_REGISTER_SPACE_BASE
+
1306 (kv
->value
.csr_offset
<< 2);
1308 else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
)
1310 ORB_SET_LUN(kv
->value
.immediate
);
1313 case SBP2_COMMAND_SET_SPEC_ID_KEY
:
1314 command_set_spec_id
= kv
->value
.immediate
;
1317 case SBP2_COMMAND_SET_KEY
:
1318 command_set
= kv
->value
.immediate
;
1321 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1322 /* FIXME: This is ignored so far.
1323 * See SBP-2 clause 7.4.8. */
1324 unit_characteristics
= kv
->value
.immediate
;
1327 case SBP2_FIRMWARE_REVISION_KEY
:
1328 firmware_revision
= kv
->value
.immediate
;
1332 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1333 * Its "ordered" bit has consequences for command ORB
1334 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1339 workarounds
= sbp2_default_workarounds
;
1341 if (!(workarounds
& SBP2_WORKAROUND_OVERRIDE
))
1342 for (i
= 0; i
< ARRAY_SIZE(sbp2_workarounds_table
); i
++) {
1343 if (sbp2_workarounds_table
[i
].firmware_revision
&&
1344 sbp2_workarounds_table
[i
].firmware_revision
!=
1345 (firmware_revision
& 0xffff00))
1347 if (sbp2_workarounds_table
[i
].model_id
&&
1348 sbp2_workarounds_table
[i
].model_id
!= ud
->model_id
)
1350 workarounds
|= sbp2_workarounds_table
[i
].workarounds
;
1355 SBP2_INFO("Workarounds for node " NODE_BUS_FMT
": 0x%x "
1356 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1357 " model_id 0x%06x)",
1358 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1359 workarounds
, firmware_revision
,
1360 ud
->vendor_id
? ud
->vendor_id
: ud
->ne
->vendor_id
,
1363 /* We would need one SCSI host template for each target to adjust
1364 * max_sectors on the fly, therefore warn only. */
1365 if (workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
&&
1366 (max_sectors
* 512) > (128 * 1024))
1367 SBP2_INFO("Node " NODE_BUS_FMT
": Bridge only supports 128KB "
1368 "max transfer size. WARNING: Current max_sectors "
1369 "setting is larger than 128KB (%d sectors)",
1370 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1373 /* If this is a logical unit directory entry, process the parent
1374 * to get the values. */
1375 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1376 struct unit_directory
*parent_ud
=
1377 container_of(ud
->device
.parent
, struct unit_directory
, device
);
1378 sbp2_parse_unit_directory(scsi_id
, parent_ud
);
1380 scsi_id
->sbp2_management_agent_addr
= management_agent_addr
;
1381 scsi_id
->sbp2_command_set_spec_id
= command_set_spec_id
;
1382 scsi_id
->sbp2_command_set
= command_set
;
1383 scsi_id
->sbp2_unit_characteristics
= unit_characteristics
;
1384 scsi_id
->sbp2_firmware_revision
= firmware_revision
;
1385 scsi_id
->workarounds
= workarounds
;
1386 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1387 scsi_id
->sbp2_lun
= ORB_SET_LUN(ud
->lun
);
1391 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1394 * This function is called in order to determine the max speed and packet
1395 * size we can use in our ORBs. Note, that we (the driver and host) only
1396 * initiate the transaction. The SBP-2 device actually transfers the data
1397 * (by reading from the DMA area we tell it). This means that the SBP-2
1398 * device decides the actual maximum data it can transfer. We just tell it
1399 * the speed that it needs to use, and the max_rec the host supports, and
1400 * it takes care of the rest.
1402 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*scsi_id
)
1404 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1407 scsi_id
->speed_code
=
1408 hi
->host
->speed
[NODEID_TO_NODE(scsi_id
->ne
->nodeid
)];
1410 if (scsi_id
->speed_code
> max_speed
) {
1411 scsi_id
->speed_code
= max_speed
;
1412 SBP2_INFO("Reducing speed to %s", hpsb_speedto_str
[max_speed
]);
1415 /* Payload size is the lesser of what our speed supports and what
1416 * our host supports. */
1417 payload
= min(sbp2_speedto_max_payload
[scsi_id
->speed_code
],
1418 (u8
) (hi
->host
->csr
.max_rec
- 1));
1420 /* If physical DMA is off, work around limitation in ohci1394:
1421 * packet size must not exceed PAGE_SIZE */
1422 if (scsi_id
->ne
->host
->low_addr_space
< (1ULL << 32))
1423 while (SBP2_PAYLOAD_TO_BYTES(payload
) + 24 > PAGE_SIZE
&&
1427 SBP2_INFO("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1428 NODE_BUS_ARGS(hi
->host
, scsi_id
->ne
->nodeid
),
1429 hpsb_speedto_str
[scsi_id
->speed_code
],
1430 SBP2_PAYLOAD_TO_BYTES(payload
));
1432 scsi_id
->max_payload_size
= payload
;
1436 static int sbp2_agent_reset(struct scsi_id_instance_data
*scsi_id
, int wait
)
1441 unsigned long flags
;
1443 /* cancel_delayed_work(&scsi_id->protocol_work); */
1445 flush_scheduled_work();
1447 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1448 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1451 retval
= hpsb_node_write(scsi_id
->ne
, addr
, &data
, 4);
1453 retval
= sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, &data
, 4);
1456 SBP2_ERR("hpsb_node_write failed.\n");
1460 /* make sure that the ORB_POINTER is written on next command */
1461 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1462 scsi_id
->last_orb
= NULL
;
1463 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1468 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb
*orb
,
1469 struct sbp2scsi_host_info
*hi
,
1470 struct sbp2_command_info
*command
,
1471 unsigned int scsi_use_sg
,
1472 struct scatterlist
*sgpnt
,
1474 enum dma_data_direction dma_dir
)
1476 command
->dma_dir
= dma_dir
;
1477 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1478 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1480 /* special case if only one element (and less than 64KB in size) */
1481 if ((scsi_use_sg
== 1) &&
1482 (sgpnt
[0].length
<= SBP2_MAX_SG_ELEMENT_LENGTH
)) {
1484 command
->dma_size
= sgpnt
[0].length
;
1485 command
->dma_type
= CMD_DMA_PAGE
;
1486 command
->cmd_dma
= pci_map_page(hi
->host
->pdev
,
1492 orb
->data_descriptor_lo
= command
->cmd_dma
;
1493 orb
->misc
|= ORB_SET_DATA_SIZE(command
->dma_size
);
1496 struct sbp2_unrestricted_page_table
*sg_element
=
1497 &command
->scatter_gather_element
[0];
1498 u32 sg_count
, sg_len
;
1500 int i
, count
= pci_map_sg(hi
->host
->pdev
, sgpnt
, scsi_use_sg
,
1503 command
->dma_size
= scsi_use_sg
;
1504 command
->sge_buffer
= sgpnt
;
1506 /* use page tables (s/g) */
1507 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1508 orb
->data_descriptor_lo
= command
->sge_dma
;
1510 /* loop through and fill out our SBP-2 page tables
1511 * (and split up anything too large) */
1512 for (i
= 0, sg_count
= 0 ; i
< count
; i
++, sgpnt
++) {
1513 sg_len
= sg_dma_len(sgpnt
);
1514 sg_addr
= sg_dma_address(sgpnt
);
1516 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1517 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1518 sg_element
[sg_count
].length_segment_base_hi
=
1519 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1520 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1521 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1523 sg_element
[sg_count
].length_segment_base_hi
=
1524 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1531 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1533 sbp2util_cpu_to_be32_buffer(sg_element
,
1534 (sizeof(struct sbp2_unrestricted_page_table
)) *
1539 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb
*orb
,
1540 struct sbp2scsi_host_info
*hi
,
1541 struct sbp2_command_info
*command
,
1542 struct scatterlist
*sgpnt
,
1544 unsigned int scsi_request_bufflen
,
1545 void *scsi_request_buffer
,
1546 enum dma_data_direction dma_dir
)
1548 command
->dma_dir
= dma_dir
;
1549 command
->dma_size
= scsi_request_bufflen
;
1550 command
->dma_type
= CMD_DMA_SINGLE
;
1551 command
->cmd_dma
= pci_map_single(hi
->host
->pdev
, scsi_request_buffer
,
1552 command
->dma_size
, command
->dma_dir
);
1553 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1554 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1556 /* handle case where we get a command w/o s/g enabled
1557 * (but check for transfers larger than 64K) */
1558 if (scsi_request_bufflen
<= SBP2_MAX_SG_ELEMENT_LENGTH
) {
1560 orb
->data_descriptor_lo
= command
->cmd_dma
;
1561 orb
->misc
|= ORB_SET_DATA_SIZE(scsi_request_bufflen
);
1564 /* The buffer is too large. Turn this into page tables. */
1566 struct sbp2_unrestricted_page_table
*sg_element
=
1567 &command
->scatter_gather_element
[0];
1568 u32 sg_count
, sg_len
;
1571 orb
->data_descriptor_lo
= command
->sge_dma
;
1572 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1574 /* fill out our SBP-2 page tables; split up the large buffer */
1576 sg_len
= scsi_request_bufflen
;
1577 sg_addr
= command
->cmd_dma
;
1579 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1580 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1581 sg_element
[sg_count
].length_segment_base_hi
=
1582 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1583 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1584 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1586 sg_element
[sg_count
].length_segment_base_hi
=
1587 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1593 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1595 sbp2util_cpu_to_be32_buffer(sg_element
,
1596 (sizeof(struct sbp2_unrestricted_page_table
)) *
1601 static void sbp2_create_command_orb(struct scsi_id_instance_data
*scsi_id
,
1602 struct sbp2_command_info
*command
,
1604 unsigned int scsi_use_sg
,
1605 unsigned int scsi_request_bufflen
,
1606 void *scsi_request_buffer
,
1607 enum dma_data_direction dma_dir
)
1609 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1610 struct scatterlist
*sgpnt
= (struct scatterlist
*)scsi_request_buffer
;
1611 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1615 * Set-up our command ORB.
1617 * NOTE: We're doing unrestricted page tables (s/g), as this is
1618 * best performance (at least with the devices I have). This means
1619 * that data_size becomes the number of s/g elements, and
1620 * page_size should be zero (for unrestricted).
1622 command_orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1623 command_orb
->next_ORB_lo
= 0x0;
1624 command_orb
->misc
= ORB_SET_MAX_PAYLOAD(scsi_id
->max_payload_size
);
1625 command_orb
->misc
|= ORB_SET_SPEED(scsi_id
->speed_code
);
1626 command_orb
->misc
|= ORB_SET_NOTIFY(1);
1628 if (dma_dir
== DMA_NONE
)
1629 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1630 else if (dma_dir
== DMA_TO_DEVICE
&& scsi_request_bufflen
)
1631 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1632 else if (dma_dir
== DMA_FROM_DEVICE
&& scsi_request_bufflen
)
1633 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1635 SBP2_INFO("Falling back to DMA_NONE");
1636 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1639 /* set up our page table stuff */
1640 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1641 command_orb
->data_descriptor_hi
= 0x0;
1642 command_orb
->data_descriptor_lo
= 0x0;
1643 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1644 } else if (scsi_use_sg
)
1645 sbp2_prep_command_orb_sg(command_orb
, hi
, command
, scsi_use_sg
,
1646 sgpnt
, orb_direction
, dma_dir
);
1648 sbp2_prep_command_orb_no_sg(command_orb
, hi
, command
, sgpnt
,
1649 orb_direction
, scsi_request_bufflen
,
1650 scsi_request_buffer
, dma_dir
);
1652 sbp2util_cpu_to_be32_buffer(command_orb
, sizeof(struct sbp2_command_orb
));
1654 memset(command_orb
->cdb
, 0, 12);
1655 memcpy(command_orb
->cdb
, scsi_cmd
, COMMAND_SIZE(*scsi_cmd
));
1658 static void sbp2_link_orb_command(struct scsi_id_instance_data
*scsi_id
,
1659 struct sbp2_command_info
*command
)
1661 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1662 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1663 struct sbp2_command_orb
*last_orb
;
1664 dma_addr_t last_orb_dma
;
1665 u64 addr
= scsi_id
->sbp2_command_block_agent_addr
;
1668 unsigned long flags
;
1670 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->command_orb_dma
,
1671 sizeof(struct sbp2_command_orb
),
1673 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->sge_dma
,
1674 sizeof(command
->scatter_gather_element
),
1675 PCI_DMA_BIDIRECTIONAL
);
1677 /* check to see if there are any previous orbs to use */
1678 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1679 last_orb
= scsi_id
->last_orb
;
1680 last_orb_dma
= scsi_id
->last_orb_dma
;
1683 * last_orb == NULL means: We know that the target's fetch agent
1684 * is not active right now.
1686 addr
+= SBP2_ORB_POINTER_OFFSET
;
1687 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1688 data
[1] = command
->command_orb_dma
;
1689 sbp2util_cpu_to_be32_buffer(data
, 8);
1693 * last_orb != NULL means: We know that the target's fetch agent
1694 * is (very probably) not dead or in reset state right now.
1695 * We have an ORB already sent that we can append a new one to.
1696 * The target's fetch agent may or may not have read this
1699 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, last_orb_dma
,
1700 sizeof(struct sbp2_command_orb
),
1702 last_orb
->next_ORB_lo
= cpu_to_be32(command
->command_orb_dma
);
1704 /* Tells hardware that this pointer is valid */
1705 last_orb
->next_ORB_hi
= 0;
1706 pci_dma_sync_single_for_device(hi
->host
->pdev
, last_orb_dma
,
1707 sizeof(struct sbp2_command_orb
),
1709 addr
+= SBP2_DOORBELL_OFFSET
;
1713 scsi_id
->last_orb
= command_orb
;
1714 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1715 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1717 if (sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, data
, length
)) {
1719 * sbp2util_node_write_no_wait failed. We certainly ran out
1720 * of transaction labels, perhaps just because there were no
1721 * context switches which gave khpsbpkt a chance to collect
1722 * free tlabels. Try again in non-atomic context. If necessary,
1723 * the workqueue job will sleep to guaranteedly get a tlabel.
1724 * We do not accept new commands until the job is over.
1726 scsi_block_requests(scsi_id
->scsi_host
);
1727 PREPARE_WORK(&scsi_id
->protocol_work
,
1728 last_orb
? sbp2util_write_doorbell
:
1729 sbp2util_write_orb_pointer
1731 schedule_work(&scsi_id
->protocol_work
);
1735 static int sbp2_send_command(struct scsi_id_instance_data
*scsi_id
,
1736 struct scsi_cmnd
*SCpnt
,
1737 void (*done
)(struct scsi_cmnd
*))
1739 unchar
*cmd
= (unchar
*) SCpnt
->cmnd
;
1740 unsigned int request_bufflen
= SCpnt
->request_bufflen
;
1741 struct sbp2_command_info
*command
;
1743 command
= sbp2util_allocate_command_orb(scsi_id
, SCpnt
, done
);
1747 sbp2_create_command_orb(scsi_id
, command
, cmd
, SCpnt
->use_sg
,
1748 request_bufflen
, SCpnt
->request_buffer
,
1749 SCpnt
->sc_data_direction
);
1750 sbp2_link_orb_command(scsi_id
, command
);
1756 * Translates SBP-2 status into SCSI sense data for check conditions
1758 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
, unchar
*sense_data
)
1760 /* OK, it's pretty ugly... ;-) */
1761 sense_data
[0] = 0x70;
1762 sense_data
[1] = 0x0;
1763 sense_data
[2] = sbp2_status
[9];
1764 sense_data
[3] = sbp2_status
[12];
1765 sense_data
[4] = sbp2_status
[13];
1766 sense_data
[5] = sbp2_status
[14];
1767 sense_data
[6] = sbp2_status
[15];
1769 sense_data
[8] = sbp2_status
[16];
1770 sense_data
[9] = sbp2_status
[17];
1771 sense_data
[10] = sbp2_status
[18];
1772 sense_data
[11] = sbp2_status
[19];
1773 sense_data
[12] = sbp2_status
[10];
1774 sense_data
[13] = sbp2_status
[11];
1775 sense_data
[14] = sbp2_status
[20];
1776 sense_data
[15] = sbp2_status
[21];
1778 return sbp2_status
[8] & 0x3f;
1781 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
,
1782 int destid
, quadlet_t
*data
, u64 addr
,
1783 size_t length
, u16 fl
)
1785 struct sbp2scsi_host_info
*hi
;
1786 struct scsi_id_instance_data
*scsi_id
= NULL
, *scsi_id_tmp
;
1787 struct scsi_cmnd
*SCpnt
= NULL
;
1788 struct sbp2_status_block
*sb
;
1789 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
1790 struct sbp2_command_info
*command
;
1791 unsigned long flags
;
1793 if (unlikely(length
< 8 || length
> sizeof(struct sbp2_status_block
))) {
1794 SBP2_ERR("Wrong size of status block");
1795 return RCODE_ADDRESS_ERROR
;
1797 if (unlikely(!host
)) {
1798 SBP2_ERR("host is NULL - this is bad!");
1799 return RCODE_ADDRESS_ERROR
;
1801 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
1802 if (unlikely(!hi
)) {
1803 SBP2_ERR("host info is NULL - this is bad!");
1804 return RCODE_ADDRESS_ERROR
;
1807 /* Find the unit which wrote the status. */
1808 list_for_each_entry(scsi_id_tmp
, &hi
->scsi_ids
, scsi_list
) {
1809 if (scsi_id_tmp
->ne
->nodeid
== nodeid
&&
1810 scsi_id_tmp
->status_fifo_addr
== addr
) {
1811 scsi_id
= scsi_id_tmp
;
1815 if (unlikely(!scsi_id
)) {
1816 SBP2_ERR("scsi_id is NULL - device is gone?");
1817 return RCODE_ADDRESS_ERROR
;
1820 /* Put response into scsi_id status fifo buffer. The first two bytes
1821 * come in big endian bit order. Often the target writes only a
1822 * truncated status block, minimally the first two quadlets. The rest
1823 * is implied to be zeros. */
1824 sb
= &scsi_id
->status_block
;
1825 memset(sb
->command_set_dependent
, 0, sizeof(sb
->command_set_dependent
));
1826 memcpy(sb
, data
, length
);
1827 sbp2util_be32_to_cpu_buffer(sb
, 8);
1829 /* Ignore unsolicited status. Handle command ORB status. */
1830 if (unlikely(STATUS_GET_SRC(sb
->ORB_offset_hi_misc
) == 2))
1833 command
= sbp2util_find_command_for_orb(scsi_id
,
1836 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
1837 sizeof(struct sbp2_command_orb
),
1839 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
1840 sizeof(command
->scatter_gather_element
),
1841 PCI_DMA_BIDIRECTIONAL
);
1842 /* Grab SCSI command pointers and check status. */
1844 * FIXME: If the src field in the status is 1, the ORB DMA must
1845 * not be reused until status for a subsequent ORB is received.
1847 SCpnt
= command
->Current_SCpnt
;
1848 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1849 sbp2util_mark_command_completed(scsi_id
, command
);
1850 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1853 u32 h
= sb
->ORB_offset_hi_misc
;
1854 u32 r
= STATUS_GET_RESP(h
);
1856 if (r
!= RESP_STATUS_REQUEST_COMPLETE
) {
1857 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1858 r
, STATUS_GET_SBP_STATUS(h
));
1860 r
== RESP_STATUS_TRANSPORT_FAILURE
?
1861 SBP2_SCSI_STATUS_BUSY
:
1862 SBP2_SCSI_STATUS_COMMAND_TERMINATED
;
1865 if (STATUS_GET_LEN(h
) > 1)
1866 scsi_status
= sbp2_status_to_sense_data(
1867 (unchar
*)sb
, SCpnt
->sense_buffer
);
1869 if (STATUS_TEST_DEAD(h
))
1870 sbp2_agent_reset(scsi_id
, 0);
1873 /* Check here to see if there are no commands in-use. If there
1874 * are none, we know that the fetch agent left the active state
1875 * _and_ that we did not reactivate it yet. Therefore clear
1876 * last_orb so that next time we write directly to the
1877 * ORB_POINTER register. That way the fetch agent does not need
1878 * to refetch the next_ORB. */
1879 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1880 if (list_empty(&scsi_id
->sbp2_command_orb_inuse
))
1881 scsi_id
->last_orb
= NULL
;
1882 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1885 /* It's probably status after a management request. */
1886 if ((sb
->ORB_offset_lo
== scsi_id
->reconnect_orb_dma
) ||
1887 (sb
->ORB_offset_lo
== scsi_id
->login_orb_dma
) ||
1888 (sb
->ORB_offset_lo
== scsi_id
->query_logins_orb_dma
) ||
1889 (sb
->ORB_offset_lo
== scsi_id
->logout_orb_dma
)) {
1890 scsi_id
->access_complete
= 1;
1891 wake_up_interruptible(&access_wq
);
1896 sbp2scsi_complete_command(scsi_id
, scsi_status
, SCpnt
,
1897 command
->Current_done
);
1898 return RCODE_COMPLETE
;
1901 /**************************************
1902 * SCSI interface related section
1903 **************************************/
1905 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
1906 void (*done
)(struct scsi_cmnd
*))
1908 struct scsi_id_instance_data
*scsi_id
=
1909 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
1910 struct sbp2scsi_host_info
*hi
;
1911 int result
= DID_NO_CONNECT
<< 16;
1913 if (!sbp2util_node_is_available(scsi_id
))
1919 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
1923 /* Multiple units are currently represented to the SCSI core as separate
1924 * targets, not as one target with multiple LUs. Therefore return
1925 * selection time-out to any IO directed at non-zero LUNs. */
1926 if (SCpnt
->device
->lun
)
1929 /* handle the request sense command here (auto-request sense) */
1930 if (SCpnt
->cmnd
[0] == REQUEST_SENSE
) {
1931 memcpy(SCpnt
->request_buffer
, SCpnt
->sense_buffer
, SCpnt
->request_bufflen
);
1932 memset(SCpnt
->sense_buffer
, 0, sizeof(SCpnt
->sense_buffer
));
1933 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_GOOD
, SCpnt
, done
);
1937 if (!hpsb_node_entry_valid(scsi_id
->ne
)) {
1938 SBP2_ERR("Bus reset in progress - rejecting command");
1939 result
= DID_BUS_BUSY
<< 16;
1943 /* Bidirectional commands are not yet implemented,
1944 * and unknown transfer direction not handled. */
1945 if (SCpnt
->sc_data_direction
== DMA_BIDIRECTIONAL
) {
1946 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1947 result
= DID_ERROR
<< 16;
1951 if (sbp2_send_command(scsi_id
, SCpnt
, done
)) {
1952 SBP2_ERR("Error sending SCSI command");
1953 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
1959 SCpnt
->result
= result
;
1964 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
1967 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1968 struct list_head
*lh
;
1969 struct sbp2_command_info
*command
;
1970 unsigned long flags
;
1972 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1973 while (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
1974 lh
= scsi_id
->sbp2_command_orb_inuse
.next
;
1975 command
= list_entry(lh
, struct sbp2_command_info
, list
);
1976 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
1977 sizeof(struct sbp2_command_orb
),
1979 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
1980 sizeof(command
->scatter_gather_element
),
1981 PCI_DMA_BIDIRECTIONAL
);
1982 sbp2util_mark_command_completed(scsi_id
, command
);
1983 if (command
->Current_SCpnt
) {
1984 command
->Current_SCpnt
->result
= status
<< 16;
1985 command
->Current_done(command
->Current_SCpnt
);
1988 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1994 * Complete a regular SCSI command. Can be called in atomic context.
1996 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
1997 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
1998 void (*done
)(struct scsi_cmnd
*))
2001 SBP2_ERR("SCpnt is NULL");
2005 switch (scsi_status
) {
2006 case SBP2_SCSI_STATUS_GOOD
:
2007 SCpnt
->result
= DID_OK
<< 16;
2010 case SBP2_SCSI_STATUS_BUSY
:
2011 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2012 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2015 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
2016 SCpnt
->result
= CHECK_CONDITION
<< 1 | DID_OK
<< 16;
2019 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
2020 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2021 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2022 scsi_print_command(SCpnt
);
2025 case SBP2_SCSI_STATUS_CONDITION_MET
:
2026 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
2027 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
2028 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
2029 SCpnt
->result
= DID_ERROR
<< 16;
2030 scsi_print_command(SCpnt
);
2034 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
2035 SCpnt
->result
= DID_ERROR
<< 16;
2038 /* If a bus reset is in progress and there was an error, complete
2039 * the command as busy so that it will get retried. */
2040 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2041 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2042 SBP2_ERR("Completing command with busy (bus reset)");
2043 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2046 /* Tell the SCSI stack that we're done with this command. */
2050 static int sbp2scsi_slave_alloc(struct scsi_device
*sdev
)
2052 struct scsi_id_instance_data
*scsi_id
=
2053 (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0];
2055 scsi_id
->sdev
= sdev
;
2056 sdev
->allow_restart
= 1;
2058 if (scsi_id
->workarounds
& SBP2_WORKAROUND_INQUIRY_36
)
2059 sdev
->inquiry_len
= 36;
2063 static int sbp2scsi_slave_configure(struct scsi_device
*sdev
)
2065 struct scsi_id_instance_data
*scsi_id
=
2066 (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0];
2068 blk_queue_dma_alignment(sdev
->request_queue
, (512 - 1));
2069 sdev
->use_10_for_rw
= 1;
2071 if (sdev
->type
== TYPE_DISK
&&
2072 scsi_id
->workarounds
& SBP2_WORKAROUND_MODE_SENSE_8
)
2073 sdev
->skip_ms_page_8
= 1;
2074 if (scsi_id
->workarounds
& SBP2_WORKAROUND_FIX_CAPACITY
)
2075 sdev
->fix_capacity
= 1;
2079 static void sbp2scsi_slave_destroy(struct scsi_device
*sdev
)
2081 ((struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0])->sdev
= NULL
;
2086 * Called by scsi stack when something has really gone wrong.
2087 * Usually called when a command has timed-out for some reason.
2089 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2091 struct scsi_id_instance_data
*scsi_id
=
2092 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2093 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2094 struct sbp2_command_info
*command
;
2095 unsigned long flags
;
2097 SBP2_INFO("aborting sbp2 command");
2098 scsi_print_command(SCpnt
);
2100 if (sbp2util_node_is_available(scsi_id
)) {
2101 sbp2_agent_reset(scsi_id
, 1);
2103 /* Return a matching command structure to the free pool. */
2104 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2105 command
= sbp2util_find_command_for_SCpnt(scsi_id
, SCpnt
);
2107 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2108 command
->command_orb_dma
,
2109 sizeof(struct sbp2_command_orb
),
2111 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2113 sizeof(command
->scatter_gather_element
),
2114 PCI_DMA_BIDIRECTIONAL
);
2115 sbp2util_mark_command_completed(scsi_id
, command
);
2116 if (command
->Current_SCpnt
) {
2117 command
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2118 command
->Current_done(command
->Current_SCpnt
);
2121 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2123 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
2130 * Called by scsi stack when something has really gone wrong.
2132 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2134 struct scsi_id_instance_data
*scsi_id
=
2135 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2137 SBP2_INFO("reset requested");
2139 if (sbp2util_node_is_available(scsi_id
)) {
2140 SBP2_INFO("generating sbp2 fetch agent reset");
2141 sbp2_agent_reset(scsi_id
, 1);
2147 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
,
2148 struct device_attribute
*attr
,
2151 struct scsi_device
*sdev
;
2152 struct scsi_id_instance_data
*scsi_id
;
2155 if (!(sdev
= to_scsi_device(dev
)))
2158 if (!(scsi_id
= (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0]))
2161 lun
= ORB_SET_LUN(scsi_id
->sbp2_lun
);
2163 return sprintf(buf
, "%016Lx:%d:%d\n", (unsigned long long)scsi_id
->ne
->guid
,
2164 scsi_id
->ud
->id
, lun
);
2167 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2168 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2169 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2170 MODULE_LICENSE("GPL");
2172 static int sbp2_module_init(void)
2177 scsi_driver_template
.can_queue
= 1;
2178 scsi_driver_template
.cmd_per_lun
= 1;
2181 if (sbp2_default_workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
&&
2182 (max_sectors
* 512) > (128 * 1024))
2183 max_sectors
= 128 * 1024 / 512;
2184 scsi_driver_template
.max_sectors
= max_sectors
;
2186 hpsb_register_highlevel(&sbp2_highlevel
);
2187 ret
= hpsb_register_protocol(&sbp2_driver
);
2189 SBP2_ERR("Failed to register protocol");
2190 hpsb_unregister_highlevel(&sbp2_highlevel
);
2196 static void __exit
sbp2_module_exit(void)
2198 hpsb_unregister_protocol(&sbp2_driver
);
2199 hpsb_unregister_highlevel(&sbp2_highlevel
);
2202 module_init(sbp2_module_init
);
2203 module_exit(sbp2_module_exit
);