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/config.h>
42 #include <linux/kernel.h>
43 #include <linux/list.h>
44 #include <linux/string.h>
45 #include <linux/slab.h>
46 #include <linux/interrupt.h>
48 #include <linux/poll.h>
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/types.h>
52 #include <linux/delay.h>
53 #include <linux/sched.h>
54 #include <linux/blkdev.h>
55 #include <linux/smp_lock.h>
56 #include <linux/init.h>
57 #include <linux/pci.h>
59 #include <asm/current.h>
60 #include <asm/uaccess.h>
62 #include <asm/byteorder.h>
63 #include <asm/atomic.h>
64 #include <asm/system.h>
65 #include <asm/scatterlist.h>
67 #include <scsi/scsi.h>
68 #include <scsi/scsi_cmnd.h>
69 #include <scsi/scsi_dbg.h>
70 #include <scsi/scsi_device.h>
71 #include <scsi/scsi_host.h>
75 #include "ieee1394_types.h"
76 #include "ieee1394_core.h"
79 #include "highlevel.h"
80 #include "ieee1394_transactions.h"
84 * Module load parameter definitions
88 * Change max_speed on module load if you have a bad IEEE-1394
89 * controller that has trouble running 2KB packets at 400mb.
91 * NOTE: On certain OHCI parts I have seen short packets on async transmit
92 * (probably due to PCI latency/throughput issues with the part). You can
93 * bump down the speed if you are running into problems.
95 static int max_speed
= IEEE1394_SPEED_MAX
;
96 module_param(max_speed
, int, 0644);
97 MODULE_PARM_DESC(max_speed
, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
100 * Set serialize_io to 1 if you'd like only one scsi command sent
101 * down to us at a time (debugging). This might be necessary for very
102 * badly behaved sbp2 devices.
104 * TODO: Make this configurable per device.
106 static int serialize_io
= 1;
107 module_param(serialize_io
, int, 0444);
108 MODULE_PARM_DESC(serialize_io
, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
111 * Bump up max_sectors if you'd like to support very large sized
112 * transfers. Please note that some older sbp2 bridge chips are broken for
113 * transfers greater or equal to 128KB. Default is a value of 255
114 * sectors, or just under 128KB (at 512 byte sector size). I can note that
115 * the Oxsemi sbp2 chipsets have no problems supporting very large
118 static int max_sectors
= SBP2_MAX_SECTORS
;
119 module_param(max_sectors
, int, 0444);
120 MODULE_PARM_DESC(max_sectors
, "Change max sectors per I/O supported (default = 255)");
123 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
124 * do an exclusive login, as it's generally unsafe to have two hosts
125 * talking to a single sbp2 device at the same time (filesystem coherency,
126 * etc.). If you're running an sbp2 device that supports multiple logins,
127 * and you're either running read-only filesystems or some sort of special
128 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
129 * see opengfs.sourceforge.net for more info), then set exclusive_login
130 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
133 static int exclusive_login
= 1;
134 module_param(exclusive_login
, int, 0644);
135 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device (default = 1)");
138 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
139 * if your sbp2 device is not properly handling the SCSI inquiry command.
140 * This hack makes the inquiry look more like a typical MS Windows inquiry
141 * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8.
143 * If force_inquiry_hack=1 is required for your device to work,
144 * please submit the logged sbp2_firmware_revision value of this device to
145 * the linux1394-devel mailing list.
147 static int force_inquiry_hack
;
148 module_param(force_inquiry_hack
, int, 0644);
149 MODULE_PARM_DESC(force_inquiry_hack
, "Force SCSI inquiry hack (default = 0)");
152 * Export information about protocols/devices supported by this driver.
154 static struct ieee1394_device_id sbp2_id_table
[] = {
156 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
| IEEE1394_MATCH_VERSION
,
157 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
158 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff},
162 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
165 * Debug levels, configured via kernel config, or enable here.
168 #define CONFIG_IEEE1394_SBP2_DEBUG 0
169 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
170 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
171 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
172 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
173 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
175 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
176 #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
177 static u32 global_outstanding_command_orbs
= 0;
178 #define outstanding_orb_incr global_outstanding_command_orbs++
179 #define outstanding_orb_decr global_outstanding_command_orbs--
181 #define SBP2_ORB_DEBUG(fmt, args...)
182 #define outstanding_orb_incr
183 #define outstanding_orb_decr
186 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
187 #define SBP2_DMA_ALLOC(fmt, args...) \
188 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
189 ++global_outstanding_dmas, ## args)
190 #define SBP2_DMA_FREE(fmt, args...) \
191 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
192 --global_outstanding_dmas, ## args)
193 static u32 global_outstanding_dmas
= 0;
195 #define SBP2_DMA_ALLOC(fmt, args...)
196 #define SBP2_DMA_FREE(fmt, args...)
199 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
200 #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
201 #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
202 #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
203 #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
205 #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
206 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
207 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
208 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
210 #define SBP2_DEBUG(fmt, args...)
211 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
212 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
213 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
216 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
222 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
225 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
226 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
227 void (*done
)(struct scsi_cmnd
*));
229 static struct scsi_host_template scsi_driver_template
;
231 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
233 static void sbp2_host_reset(struct hpsb_host
*host
);
235 static int sbp2_probe(struct device
*dev
);
236 static int sbp2_remove(struct device
*dev
);
237 static int sbp2_update(struct unit_directory
*ud
);
239 static struct hpsb_highlevel sbp2_highlevel
= {
240 .name
= SBP2_DEVICE_NAME
,
241 .host_reset
= sbp2_host_reset
,
244 static struct hpsb_address_ops sbp2_ops
= {
245 .write
= sbp2_handle_status_write
248 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
249 static struct hpsb_address_ops sbp2_physdma_ops
= {
250 .read
= sbp2_handle_physdma_read
,
251 .write
= sbp2_handle_physdma_write
,
255 static struct hpsb_protocol_driver sbp2_driver
= {
256 .name
= "SBP2 Driver",
257 .id_table
= sbp2_id_table
,
258 .update
= sbp2_update
,
260 .name
= SBP2_DEVICE_NAME
,
261 .bus
= &ieee1394_bus_type
,
263 .remove
= sbp2_remove
,
268 * List of device firmwares that require the inquiry hack.
269 * Yields a few false positives but did not break other devices so far.
271 static u32 sbp2_broken_inquiry_list
[] = {
272 0x00002800, /* Stefan Richter <stefanr@s5r6.in-berlin.de> */
273 /* DViCO Momobay CX-1 */
274 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
275 /* QPS Fire DVDBurner */
278 /**************************************
279 * General utility functions
280 **************************************/
284 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
286 static __inline__
void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
290 for (length
= (length
>> 2); length
--; )
291 temp
[length
] = be32_to_cpu(temp
[length
]);
297 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
299 static __inline__
void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
303 for (length
= (length
>> 2); length
--; )
304 temp
[length
] = cpu_to_be32(temp
[length
]);
308 #else /* BIG_ENDIAN */
309 /* Why waste the cpu cycles? */
310 #define sbp2util_be32_to_cpu_buffer(x,y)
311 #define sbp2util_cpu_to_be32_buffer(x,y)
314 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
316 * Debug packet dump routine. Length is in bytes.
318 static void sbp2util_packet_dump(void *buffer
, int length
, char *dump_name
,
322 unsigned char *dump
= buffer
;
324 if (!dump
|| !length
|| !dump_name
)
328 printk("[%s, 0x%x]", dump_name
, dump_phys_addr
);
330 printk("[%s]", dump_name
);
331 for (i
= 0; i
< length
; i
++) {
340 printk("%02x ", (int)dump
[i
]);
347 #define sbp2util_packet_dump(w,x,y,z)
351 * Goofy routine that basically does a down_timeout function.
353 static int sbp2util_down_timeout(atomic_t
*done
, int timeout
)
357 for (i
= timeout
; (i
> 0 && atomic_read(done
) == 0); i
-= HZ
/10) {
358 if (msleep_interruptible(100)) /* 100ms */
361 return (i
> 0) ? 0 : 1;
364 /* Free's an allocated packet */
365 static void sbp2_free_packet(struct hpsb_packet
*packet
)
367 hpsb_free_tlabel(packet
);
368 hpsb_free_packet(packet
);
371 /* This is much like hpsb_node_write(), except it ignores the response
372 * subaction and returns immediately. Can be used from interrupts.
374 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
375 quadlet_t
*buffer
, size_t length
)
377 struct hpsb_packet
*packet
;
379 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
,
380 addr
, buffer
, length
);
384 hpsb_set_packet_complete_task(packet
,
385 (void (*)(void *))sbp2_free_packet
,
388 hpsb_node_fill_packet(ne
, packet
);
390 if (hpsb_send_packet(packet
) < 0) {
391 sbp2_free_packet(packet
);
399 * This function is called to create a pool of command orbs used for
400 * command processing. It is called when a new sbp2 device is detected.
402 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
404 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
406 unsigned long flags
, orbs
;
407 struct sbp2_command_info
*command
;
409 orbs
= serialize_io
? 2 : SBP2_MAX_CMDS
;
411 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
412 for (i
= 0; i
< orbs
; i
++) {
413 command
= kzalloc(sizeof(*command
), GFP_ATOMIC
);
415 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
,
419 command
->command_orb_dma
=
420 pci_map_single(hi
->host
->pdev
, &command
->command_orb
,
421 sizeof(struct sbp2_command_orb
),
422 PCI_DMA_BIDIRECTIONAL
);
423 SBP2_DMA_ALLOC("single command orb DMA");
425 pci_map_single(hi
->host
->pdev
,
426 &command
->scatter_gather_element
,
427 sizeof(command
->scatter_gather_element
),
428 PCI_DMA_BIDIRECTIONAL
);
429 SBP2_DMA_ALLOC("scatter_gather_element");
430 INIT_LIST_HEAD(&command
->list
);
431 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
433 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
438 * This function is called to delete a pool of command orbs.
440 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
442 struct hpsb_host
*host
= scsi_id
->hi
->host
;
443 struct list_head
*lh
, *next
;
444 struct sbp2_command_info
*command
;
447 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
448 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
449 list_for_each_safe(lh
, next
, &scsi_id
->sbp2_command_orb_completed
) {
450 command
= list_entry(lh
, struct sbp2_command_info
, list
);
452 /* Release our generic DMA's */
453 pci_unmap_single(host
->pdev
, command
->command_orb_dma
,
454 sizeof(struct sbp2_command_orb
),
455 PCI_DMA_BIDIRECTIONAL
);
456 SBP2_DMA_FREE("single command orb DMA");
457 pci_unmap_single(host
->pdev
, command
->sge_dma
,
458 sizeof(command
->scatter_gather_element
),
459 PCI_DMA_BIDIRECTIONAL
);
460 SBP2_DMA_FREE("scatter_gather_element");
465 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
470 * This function finds the sbp2_command for a given outstanding command
471 * orb.Only looks at the inuse list.
473 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
474 struct scsi_id_instance_data
*scsi_id
, dma_addr_t orb
)
476 struct sbp2_command_info
*command
;
479 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
480 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
481 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
) {
482 if (command
->command_orb_dma
== orb
) {
483 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
488 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
490 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb
);
496 * This function finds the sbp2_command for a given outstanding SCpnt.
497 * Only looks at the inuse list.
498 * Must be called with scsi_id->sbp2_command_orb_lock held.
500 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(
501 struct scsi_id_instance_data
*scsi_id
, void *SCpnt
)
503 struct sbp2_command_info
*command
;
505 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
))
506 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
)
507 if (command
->Current_SCpnt
== SCpnt
)
513 * This function allocates a command orb used to send a scsi command.
515 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
516 struct scsi_id_instance_data
*scsi_id
,
517 struct scsi_cmnd
*Current_SCpnt
,
518 void (*Current_done
)(struct scsi_cmnd
*))
520 struct list_head
*lh
;
521 struct sbp2_command_info
*command
= NULL
;
524 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
525 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
526 lh
= scsi_id
->sbp2_command_orb_completed
.next
;
528 command
= list_entry(lh
, struct sbp2_command_info
, list
);
529 command
->Current_done
= Current_done
;
530 command
->Current_SCpnt
= Current_SCpnt
;
531 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_inuse
);
533 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
535 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
540 static void sbp2util_free_command_dma(struct sbp2_command_info
*command
)
542 struct scsi_id_instance_data
*scsi_id
=
543 (struct scsi_id_instance_data
*)command
->Current_SCpnt
->device
->host
->hostdata
[0];
544 struct hpsb_host
*host
;
547 printk(KERN_ERR
"%s: scsi_id == NULL\n", __FUNCTION__
);
551 host
= scsi_id
->ud
->ne
->host
;
553 if (command
->cmd_dma
) {
554 if (command
->dma_type
== CMD_DMA_SINGLE
) {
555 pci_unmap_single(host
->pdev
, command
->cmd_dma
,
556 command
->dma_size
, command
->dma_dir
);
557 SBP2_DMA_FREE("single bulk");
558 } else if (command
->dma_type
== CMD_DMA_PAGE
) {
559 pci_unmap_page(host
->pdev
, command
->cmd_dma
,
560 command
->dma_size
, command
->dma_dir
);
561 SBP2_DMA_FREE("single page");
562 } /* XXX: Check for CMD_DMA_NONE bug */
563 command
->dma_type
= CMD_DMA_NONE
;
564 command
->cmd_dma
= 0;
567 if (command
->sge_buffer
) {
568 pci_unmap_sg(host
->pdev
, command
->sge_buffer
,
569 command
->dma_size
, command
->dma_dir
);
570 SBP2_DMA_FREE("scatter list");
571 command
->sge_buffer
= NULL
;
576 * This function moves a command to the completed orb list.
577 * Must be called with scsi_id->sbp2_command_orb_lock held.
579 static void sbp2util_mark_command_completed(
580 struct scsi_id_instance_data
*scsi_id
,
581 struct sbp2_command_info
*command
)
583 list_del(&command
->list
);
584 sbp2util_free_command_dma(command
);
585 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
589 * Is scsi_id valid? Is the 1394 node still present?
591 static inline int sbp2util_node_is_available(struct scsi_id_instance_data
*scsi_id
)
593 return scsi_id
&& scsi_id
->ne
&& !scsi_id
->ne
->in_limbo
;
596 /*********************************************
597 * IEEE-1394 core driver stack related section
598 *********************************************/
599 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
);
601 static int sbp2_probe(struct device
*dev
)
603 struct unit_directory
*ud
;
604 struct scsi_id_instance_data
*scsi_id
;
606 SBP2_DEBUG("sbp2_probe");
608 ud
= container_of(dev
, struct unit_directory
, device
);
610 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
612 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
615 scsi_id
= sbp2_alloc_device(ud
);
620 sbp2_parse_unit_directory(scsi_id
, ud
);
622 return sbp2_start_device(scsi_id
);
625 static int sbp2_remove(struct device
*dev
)
627 struct unit_directory
*ud
;
628 struct scsi_id_instance_data
*scsi_id
;
629 struct scsi_device
*sdev
;
631 SBP2_DEBUG("sbp2_remove");
633 ud
= container_of(dev
, struct unit_directory
, device
);
634 scsi_id
= ud
->device
.driver_data
;
638 if (scsi_id
->scsi_host
) {
639 /* Get rid of enqueued commands if there is no chance to
641 if (!sbp2util_node_is_available(scsi_id
))
642 sbp2scsi_complete_all_commands(scsi_id
, DID_NO_CONNECT
);
643 /* scsi_remove_device() will trigger shutdown functions of SCSI
644 * highlevel drivers which would deadlock if blocked. */
645 scsi_unblock_requests(scsi_id
->scsi_host
);
647 sdev
= scsi_id
->sdev
;
649 scsi_id
->sdev
= NULL
;
650 scsi_remove_device(sdev
);
653 sbp2_logout_device(scsi_id
);
654 sbp2_remove_device(scsi_id
);
659 static int sbp2_update(struct unit_directory
*ud
)
661 struct scsi_id_instance_data
*scsi_id
= ud
->device
.driver_data
;
663 SBP2_DEBUG("sbp2_update");
665 if (sbp2_reconnect_device(scsi_id
)) {
668 * Ok, reconnect has failed. Perhaps we didn't
669 * reconnect fast enough. Try doing a regular login, but
670 * first do a logout just in case of any weirdness.
672 sbp2_logout_device(scsi_id
);
674 if (sbp2_login_device(scsi_id
)) {
675 /* Login failed too, just fail, and the backend
676 * will call our sbp2_remove for us */
677 SBP2_ERR("Failed to reconnect to sbp2 device!");
682 /* Set max retries to something large on the device. */
683 sbp2_set_busy_timeout(scsi_id
);
685 /* Do a SBP-2 fetch agent reset. */
686 sbp2_agent_reset(scsi_id
, 1);
688 /* Get the max speed and packet size that we can use. */
689 sbp2_max_speed_and_size(scsi_id
);
691 /* Complete any pending commands with busy (so they get
692 * retried) and remove them from our queue
694 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
696 /* Make sure we unblock requests (since this is likely after a bus
698 scsi_unblock_requests(scsi_id
->scsi_host
);
703 /* This functions is called by the sbp2_probe, for each new device. We now
704 * allocate one scsi host for each scsi_id (unit directory). */
705 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
)
707 struct sbp2scsi_host_info
*hi
;
708 struct Scsi_Host
*scsi_host
= NULL
;
709 struct scsi_id_instance_data
*scsi_id
= NULL
;
711 SBP2_DEBUG("sbp2_alloc_device");
713 scsi_id
= kzalloc(sizeof(*scsi_id
), GFP_KERNEL
);
715 SBP2_ERR("failed to create scsi_id");
719 scsi_id
->ne
= ud
->ne
;
721 scsi_id
->speed_code
= IEEE1394_SPEED_100
;
722 scsi_id
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
723 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
724 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_inuse
);
725 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_completed
);
726 INIT_LIST_HEAD(&scsi_id
->scsi_list
);
727 spin_lock_init(&scsi_id
->sbp2_command_orb_lock
);
728 scsi_id
->sbp2_lun
= 0;
730 ud
->device
.driver_data
= scsi_id
;
732 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
734 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
, sizeof(*hi
));
736 SBP2_ERR("failed to allocate hostinfo");
739 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
740 hi
->host
= ud
->ne
->host
;
741 INIT_LIST_HEAD(&hi
->scsi_ids
);
743 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
744 /* Handle data movement if physical dma is not
745 * enabled/supportedon host controller */
746 hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
, &sbp2_physdma_ops
,
747 0x0ULL
, 0xfffffffcULL
);
753 list_add_tail(&scsi_id
->scsi_list
, &hi
->scsi_ids
);
755 /* Register the status FIFO address range. We could use the same FIFO
756 * for targets at different nodes. However we need different FIFOs per
757 * target in order to support multi-unit devices. */
758 scsi_id
->status_fifo_addr
= hpsb_allocate_and_register_addrspace(
759 &sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
760 sizeof(struct sbp2_status_block
), sizeof(quadlet_t
),
762 if (!scsi_id
->status_fifo_addr
) {
763 SBP2_ERR("failed to allocate status FIFO address range");
767 /* Register our host with the SCSI stack. */
768 scsi_host
= scsi_host_alloc(&scsi_driver_template
,
769 sizeof(unsigned long));
771 SBP2_ERR("failed to register scsi host");
775 scsi_host
->hostdata
[0] = (unsigned long)scsi_id
;
777 if (!scsi_add_host(scsi_host
, &ud
->device
)) {
778 scsi_id
->scsi_host
= scsi_host
;
782 SBP2_ERR("failed to add scsi host");
783 scsi_host_put(scsi_host
);
786 sbp2_remove_device(scsi_id
);
790 static void sbp2_host_reset(struct hpsb_host
*host
)
792 struct sbp2scsi_host_info
*hi
;
793 struct scsi_id_instance_data
*scsi_id
;
795 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
798 list_for_each_entry(scsi_id
, &hi
->scsi_ids
, scsi_list
)
799 scsi_block_requests(scsi_id
->scsi_host
);
804 * This function is where we first pull the node unique ids, and then
805 * allocate memory and register a SBP-2 device.
807 static int sbp2_start_device(struct scsi_id_instance_data
*scsi_id
)
809 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
812 SBP2_DEBUG("sbp2_start_device");
815 scsi_id
->login_response
=
816 pci_alloc_consistent(hi
->host
->pdev
,
817 sizeof(struct sbp2_login_response
),
818 &scsi_id
->login_response_dma
);
819 if (!scsi_id
->login_response
)
821 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
823 /* Query logins ORB DMA */
824 scsi_id
->query_logins_orb
=
825 pci_alloc_consistent(hi
->host
->pdev
,
826 sizeof(struct sbp2_query_logins_orb
),
827 &scsi_id
->query_logins_orb_dma
);
828 if (!scsi_id
->query_logins_orb
)
830 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
832 /* Query logins response DMA */
833 scsi_id
->query_logins_response
=
834 pci_alloc_consistent(hi
->host
->pdev
,
835 sizeof(struct sbp2_query_logins_response
),
836 &scsi_id
->query_logins_response_dma
);
837 if (!scsi_id
->query_logins_response
)
839 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
841 /* Reconnect ORB DMA */
842 scsi_id
->reconnect_orb
=
843 pci_alloc_consistent(hi
->host
->pdev
,
844 sizeof(struct sbp2_reconnect_orb
),
845 &scsi_id
->reconnect_orb_dma
);
846 if (!scsi_id
->reconnect_orb
)
848 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
851 scsi_id
->logout_orb
=
852 pci_alloc_consistent(hi
->host
->pdev
,
853 sizeof(struct sbp2_logout_orb
),
854 &scsi_id
->logout_orb_dma
);
855 if (!scsi_id
->logout_orb
)
857 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
861 pci_alloc_consistent(hi
->host
->pdev
,
862 sizeof(struct sbp2_login_orb
),
863 &scsi_id
->login_orb_dma
);
864 if (!scsi_id
->login_orb
)
866 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
868 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id
->ud
->id
);
871 * Create our command orb pool
873 if (sbp2util_create_command_orb_pool(scsi_id
)) {
874 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
875 sbp2_remove_device(scsi_id
);
879 /* Schedule a timeout here. The reason is that we may be so close
880 * to a bus reset, that the device is not available for logins.
881 * This can happen when the bus reset is caused by the host
882 * connected to the sbp2 device being removed. That host would
883 * have a certain amount of time to relogin before the sbp2 device
884 * allows someone else to login instead. One second makes sense. */
885 msleep_interruptible(1000);
886 if (signal_pending(current
)) {
887 SBP2_WARN("aborting sbp2_start_device due to event");
888 sbp2_remove_device(scsi_id
);
893 * Login to the sbp-2 device
895 if (sbp2_login_device(scsi_id
)) {
896 /* Login failed, just remove the device. */
897 sbp2_remove_device(scsi_id
);
902 * Set max retries to something large on the device
904 sbp2_set_busy_timeout(scsi_id
);
907 * Do a SBP-2 fetch agent reset
909 sbp2_agent_reset(scsi_id
, 1);
912 * Get the max speed and packet size that we can use
914 sbp2_max_speed_and_size(scsi_id
);
916 /* Add this device to the scsi layer now */
917 error
= scsi_add_device(scsi_id
->scsi_host
, 0, scsi_id
->ud
->id
, 0);
919 SBP2_ERR("scsi_add_device failed");
920 sbp2_logout_device(scsi_id
);
921 sbp2_remove_device(scsi_id
);
928 SBP2_ERR("Could not allocate memory for scsi_id");
929 sbp2_remove_device(scsi_id
);
934 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
936 static void sbp2_remove_device(struct scsi_id_instance_data
*scsi_id
)
938 struct sbp2scsi_host_info
*hi
;
940 SBP2_DEBUG("sbp2_remove_device");
947 /* This will remove our scsi device aswell */
948 if (scsi_id
->scsi_host
) {
949 scsi_remove_host(scsi_id
->scsi_host
);
950 scsi_host_put(scsi_id
->scsi_host
);
953 sbp2util_remove_command_orb_pool(scsi_id
);
955 list_del(&scsi_id
->scsi_list
);
957 if (scsi_id
->login_response
) {
958 pci_free_consistent(hi
->host
->pdev
,
959 sizeof(struct sbp2_login_response
),
960 scsi_id
->login_response
,
961 scsi_id
->login_response_dma
);
962 SBP2_DMA_FREE("single login FIFO");
965 if (scsi_id
->login_orb
) {
966 pci_free_consistent(hi
->host
->pdev
,
967 sizeof(struct sbp2_login_orb
),
969 scsi_id
->login_orb_dma
);
970 SBP2_DMA_FREE("single login ORB");
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 SBP2_DMA_FREE("single reconnect orb");
981 if (scsi_id
->logout_orb
) {
982 pci_free_consistent(hi
->host
->pdev
,
983 sizeof(struct sbp2_logout_orb
),
985 scsi_id
->logout_orb_dma
);
986 SBP2_DMA_FREE("single logout orb");
989 if (scsi_id
->query_logins_orb
) {
990 pci_free_consistent(hi
->host
->pdev
,
991 sizeof(struct sbp2_query_logins_orb
),
992 scsi_id
->query_logins_orb
,
993 scsi_id
->query_logins_orb_dma
);
994 SBP2_DMA_FREE("single query logins orb");
997 if (scsi_id
->query_logins_response
) {
998 pci_free_consistent(hi
->host
->pdev
,
999 sizeof(struct sbp2_query_logins_response
),
1000 scsi_id
->query_logins_response
,
1001 scsi_id
->query_logins_response_dma
);
1002 SBP2_DMA_FREE("single query logins data");
1005 if (scsi_id
->status_fifo_addr
)
1006 hpsb_unregister_addrspace(&sbp2_highlevel
, hi
->host
,
1007 scsi_id
->status_fifo_addr
);
1009 scsi_id
->ud
->device
.driver_data
= NULL
;
1011 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id
->ud
->id
);
1016 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1018 * This function deals with physical dma write requests (for adapters that do not support
1019 * physical dma in hardware). Mostly just here for debugging...
1021 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
,
1022 int destid
, quadlet_t
*data
, u64 addr
,
1023 size_t length
, u16 flags
)
1027 * Manually put the data in the right place.
1029 memcpy(bus_to_virt((u32
) addr
), data
, length
);
1030 sbp2util_packet_dump(data
, length
, "sbp2 phys dma write by device",
1032 return RCODE_COMPLETE
;
1036 * This function deals with physical dma read requests (for adapters that do not support
1037 * physical dma in hardware). Mostly just here for debugging...
1039 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
,
1040 quadlet_t
*data
, u64 addr
, size_t length
,
1045 * Grab data from memory and send a read response.
1047 memcpy(data
, bus_to_virt((u32
) addr
), length
);
1048 sbp2util_packet_dump(data
, length
, "sbp2 phys dma read by device",
1050 return RCODE_COMPLETE
;
1054 /**************************************
1055 * SBP-2 protocol related section
1056 **************************************/
1059 * This function queries the device for the maximum concurrent logins it
1062 static int sbp2_query_logins(struct scsi_id_instance_data
*scsi_id
)
1064 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1069 SBP2_DEBUG("sbp2_query_logins");
1071 scsi_id
->query_logins_orb
->reserved1
= 0x0;
1072 scsi_id
->query_logins_orb
->reserved2
= 0x0;
1074 scsi_id
->query_logins_orb
->query_response_lo
= scsi_id
->query_logins_response_dma
;
1075 scsi_id
->query_logins_orb
->query_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1076 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1078 scsi_id
->query_logins_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1079 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1080 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1081 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1083 scsi_id
->query_logins_orb
->reserved_resp_length
=
1084 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response
));
1085 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1087 scsi_id
->query_logins_orb
->status_fifo_hi
=
1088 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1089 scsi_id
->query_logins_orb
->status_fifo_lo
=
1090 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1092 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
));
1094 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1096 sbp2util_packet_dump(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
),
1097 "sbp2 query logins orb", scsi_id
->query_logins_orb_dma
);
1099 memset(scsi_id
->query_logins_response
, 0, sizeof(struct sbp2_query_logins_response
));
1100 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1102 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1104 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1105 data
[1] = scsi_id
->query_logins_orb_dma
;
1106 sbp2util_cpu_to_be32_buffer(data
, 8);
1108 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1110 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1111 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1112 SBP2_DEBUG("sbp2_query_logins: written");
1114 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 2*HZ
)) {
1115 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1119 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->query_logins_orb_dma
) {
1120 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1124 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1125 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1126 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1128 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1132 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_response
, sizeof(struct sbp2_query_logins_response
));
1134 SBP2_DEBUG("length_max_logins = %x",
1135 (unsigned int)scsi_id
->query_logins_response
->length_max_logins
);
1137 SBP2_DEBUG("Query logins to SBP-2 device successful");
1139 max_logins
= RESPONSE_GET_MAX_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1140 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins
);
1142 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1143 SBP2_DEBUG("Number of active logins: %d", active_logins
);
1145 if (active_logins
>= max_logins
) {
1153 * This function is called in order to login to a particular SBP-2 device,
1154 * after a bus reset.
1156 static int sbp2_login_device(struct scsi_id_instance_data
*scsi_id
)
1158 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1161 SBP2_DEBUG("sbp2_login_device");
1163 if (!scsi_id
->login_orb
) {
1164 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1168 if (!exclusive_login
) {
1169 if (sbp2_query_logins(scsi_id
)) {
1170 SBP2_INFO("Device does not support any more concurrent logins");
1175 /* Set-up login ORB, assume no password */
1176 scsi_id
->login_orb
->password_hi
= 0;
1177 scsi_id
->login_orb
->password_lo
= 0;
1178 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1180 scsi_id
->login_orb
->login_response_lo
= scsi_id
->login_response_dma
;
1181 scsi_id
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1182 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1184 scsi_id
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1185 scsi_id
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0); /* One second reconnect time */
1186 scsi_id
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(exclusive_login
); /* Exclusive access to device */
1187 scsi_id
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1188 scsi_id
->login_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1189 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1191 scsi_id
->login_orb
->passwd_resp_lengths
=
1192 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1193 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1195 scsi_id
->login_orb
->status_fifo_hi
=
1196 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1197 scsi_id
->login_orb
->status_fifo_lo
=
1198 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1201 * Byte swap ORB if necessary
1203 sbp2util_cpu_to_be32_buffer(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
));
1205 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1207 sbp2util_packet_dump(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
),
1208 "sbp2 login orb", scsi_id
->login_orb_dma
);
1211 * Initialize login response and status fifo
1213 memset(scsi_id
->login_response
, 0, sizeof(struct sbp2_login_response
));
1214 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1216 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1219 * Ok, let's write to the target's management agent register
1221 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1222 data
[1] = scsi_id
->login_orb_dma
;
1223 sbp2util_cpu_to_be32_buffer(data
, 8);
1225 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1227 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1228 (unsigned int)scsi_id
->sbp2_management_agent_addr
);
1229 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1230 SBP2_DEBUG("sbp2_login_device: written");
1233 * Wait for login status (up to 20 seconds)...
1235 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 20*HZ
)) {
1236 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1241 * Sanity. Make sure status returned matches login orb.
1243 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->login_orb_dma
) {
1244 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1251 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1252 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1253 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1255 SBP2_ERR("Error logging into SBP-2 device - login failed");
1260 * Byte swap the login response, for use when reconnecting or
1263 sbp2util_cpu_to_be32_buffer(scsi_id
->login_response
, sizeof(struct sbp2_login_response
));
1266 * Grab our command block agent address from the login response.
1268 SBP2_DEBUG("command_block_agent_hi = %x",
1269 (unsigned int)scsi_id
->login_response
->command_block_agent_hi
);
1270 SBP2_DEBUG("command_block_agent_lo = %x",
1271 (unsigned int)scsi_id
->login_response
->command_block_agent_lo
);
1273 scsi_id
->sbp2_command_block_agent_addr
=
1274 ((u64
)scsi_id
->login_response
->command_block_agent_hi
) << 32;
1275 scsi_id
->sbp2_command_block_agent_addr
|= ((u64
)scsi_id
->login_response
->command_block_agent_lo
);
1276 scsi_id
->sbp2_command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1278 SBP2_INFO("Logged into SBP-2 device");
1285 * This function is called in order to logout from a particular SBP-2
1286 * device, usually called during driver unload.
1288 static int sbp2_logout_device(struct scsi_id_instance_data
*scsi_id
)
1290 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1294 SBP2_DEBUG("sbp2_logout_device");
1299 scsi_id
->logout_orb
->reserved1
= 0x0;
1300 scsi_id
->logout_orb
->reserved2
= 0x0;
1301 scsi_id
->logout_orb
->reserved3
= 0x0;
1302 scsi_id
->logout_orb
->reserved4
= 0x0;
1304 scsi_id
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1305 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1307 /* Notify us when complete */
1308 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1310 scsi_id
->logout_orb
->reserved5
= 0x0;
1311 scsi_id
->logout_orb
->status_fifo_hi
=
1312 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1313 scsi_id
->logout_orb
->status_fifo_lo
=
1314 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1317 * Byte swap ORB if necessary
1319 sbp2util_cpu_to_be32_buffer(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
));
1321 sbp2util_packet_dump(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
),
1322 "sbp2 logout orb", scsi_id
->logout_orb_dma
);
1325 * Ok, let's write to the target's management agent register
1327 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1328 data
[1] = scsi_id
->logout_orb_dma
;
1329 sbp2util_cpu_to_be32_buffer(data
, 8);
1331 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1333 error
= hpsb_node_write(scsi_id
->ne
,
1334 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1338 /* Wait for device to logout...1 second. */
1339 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
))
1342 SBP2_INFO("Logged out of SBP-2 device");
1349 * This function is called in order to reconnect to a particular SBP-2
1350 * device, after a bus reset.
1352 static int sbp2_reconnect_device(struct scsi_id_instance_data
*scsi_id
)
1354 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1358 SBP2_DEBUG("sbp2_reconnect_device");
1361 * Set-up reconnect ORB
1363 scsi_id
->reconnect_orb
->reserved1
= 0x0;
1364 scsi_id
->reconnect_orb
->reserved2
= 0x0;
1365 scsi_id
->reconnect_orb
->reserved3
= 0x0;
1366 scsi_id
->reconnect_orb
->reserved4
= 0x0;
1368 scsi_id
->reconnect_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1369 scsi_id
->reconnect_orb
->login_ID_misc
|=
1370 ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1372 /* Notify us when complete */
1373 scsi_id
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1375 scsi_id
->reconnect_orb
->reserved5
= 0x0;
1376 scsi_id
->reconnect_orb
->status_fifo_hi
=
1377 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1378 scsi_id
->reconnect_orb
->status_fifo_lo
=
1379 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1382 * Byte swap ORB if necessary
1384 sbp2util_cpu_to_be32_buffer(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
));
1386 sbp2util_packet_dump(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
),
1387 "sbp2 reconnect orb", scsi_id
->reconnect_orb_dma
);
1390 * Initialize status fifo
1392 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1395 * Ok, let's write to the target's management agent register
1397 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1398 data
[1] = scsi_id
->reconnect_orb_dma
;
1399 sbp2util_cpu_to_be32_buffer(data
, 8);
1401 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1403 error
= hpsb_node_write(scsi_id
->ne
,
1404 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1409 * Wait for reconnect status (up to 1 second)...
1411 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
)) {
1412 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1417 * Sanity. Make sure status returned matches reconnect orb.
1419 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->reconnect_orb_dma
) {
1420 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1427 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1428 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1429 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1431 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1435 HPSB_DEBUG("Reconnected to SBP-2 device");
1442 * This function is called in order to set the busy timeout (number of
1443 * retries to attempt) on the sbp2 device.
1445 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*scsi_id
)
1449 SBP2_DEBUG("sbp2_set_busy_timeout");
1452 * Ok, let's write to the target's busy timeout register
1454 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1456 if (hpsb_node_write(scsi_id
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4)) {
1457 SBP2_ERR("sbp2_set_busy_timeout error");
1464 * This function is called to parse sbp2 device's config rom unit
1465 * directory. Used to determine things like sbp2 management agent offset,
1466 * and command set used (SCSI or RBC).
1468 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*scsi_id
,
1469 struct unit_directory
*ud
)
1471 struct csr1212_keyval
*kv
;
1472 struct csr1212_dentry
*dentry
;
1473 u64 management_agent_addr
;
1474 u32 command_set_spec_id
, command_set
, unit_characteristics
,
1475 firmware_revision
, workarounds
;
1478 SBP2_DEBUG("sbp2_parse_unit_directory");
1480 management_agent_addr
= 0x0;
1481 command_set_spec_id
= 0x0;
1483 unit_characteristics
= 0x0;
1484 firmware_revision
= 0x0;
1486 /* Handle different fields in the unit directory, based on keys */
1487 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1488 switch (kv
->key
.id
) {
1489 case CSR1212_KV_ID_DEPENDENT_INFO
:
1490 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
) {
1491 /* Save off the management agent address */
1492 management_agent_addr
=
1493 CSR1212_REGISTER_SPACE_BASE
+
1494 (kv
->value
.csr_offset
<< 2);
1496 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1497 (unsigned int)management_agent_addr
);
1498 } else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1500 ORB_SET_LUN(kv
->value
.immediate
);
1504 case SBP2_COMMAND_SET_SPEC_ID_KEY
:
1505 /* Command spec organization */
1506 command_set_spec_id
= kv
->value
.immediate
;
1507 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1508 (unsigned int)command_set_spec_id
);
1511 case SBP2_COMMAND_SET_KEY
:
1512 /* Command set used by sbp2 device */
1513 command_set
= kv
->value
.immediate
;
1514 SBP2_DEBUG("sbp2_command_set = %x",
1515 (unsigned int)command_set
);
1518 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1520 * Unit characterisitcs (orb related stuff
1521 * that I'm not yet paying attention to)
1523 unit_characteristics
= kv
->value
.immediate
;
1524 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1525 (unsigned int)unit_characteristics
);
1528 case SBP2_FIRMWARE_REVISION_KEY
:
1529 /* Firmware revision */
1530 firmware_revision
= kv
->value
.immediate
;
1531 if (force_inquiry_hack
)
1532 SBP2_INFO("sbp2_firmware_revision = %x",
1533 (unsigned int)firmware_revision
);
1535 SBP2_DEBUG("sbp2_firmware_revision = %x",
1536 (unsigned int)firmware_revision
);
1544 /* This is the start of our broken device checking. We try to hack
1545 * around oddities and known defects. */
1548 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1549 * bridge with 128KB max transfer size limitation. For sanity, we
1550 * only voice this when the current max_sectors setting
1551 * exceeds the 128k limit. By default, that is not the case.
1553 * It would be really nice if we could detect this before the scsi
1554 * host gets initialized. That way we can down-force the
1555 * max_sectors to account for it. That is not currently
1557 if ((firmware_revision
& 0xffff00) ==
1558 SBP2_128KB_BROKEN_FIRMWARE
&&
1559 (max_sectors
* 512) > (128*1024)) {
1560 SBP2_WARN("Node " NODE_BUS_FMT
": Bridge only supports 128KB max transfer size.",
1561 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1562 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1564 workarounds
|= SBP2_BREAKAGE_128K_MAX_TRANSFER
;
1567 /* Check for a blacklisted set of devices that require us to force
1568 * a 36 byte host inquiry. This can be overriden as a module param
1569 * (to force all hosts). */
1570 for (i
= 0; i
< ARRAY_SIZE(sbp2_broken_inquiry_list
); i
++) {
1571 if ((firmware_revision
& 0xffff00) ==
1572 sbp2_broken_inquiry_list
[i
]) {
1573 SBP2_WARN("Node " NODE_BUS_FMT
": Using 36byte inquiry workaround",
1574 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1575 workarounds
|= SBP2_BREAKAGE_INQUIRY_HACK
;
1576 break; /* No need to continue. */
1580 /* If this is a logical unit directory entry, process the parent
1581 * to get the values. */
1582 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1583 struct unit_directory
*parent_ud
=
1584 container_of(ud
->device
.parent
, struct unit_directory
, device
);
1585 sbp2_parse_unit_directory(scsi_id
, parent_ud
);
1587 scsi_id
->sbp2_management_agent_addr
= management_agent_addr
;
1588 scsi_id
->sbp2_command_set_spec_id
= command_set_spec_id
;
1589 scsi_id
->sbp2_command_set
= command_set
;
1590 scsi_id
->sbp2_unit_characteristics
= unit_characteristics
;
1591 scsi_id
->sbp2_firmware_revision
= firmware_revision
;
1592 scsi_id
->workarounds
= workarounds
;
1593 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1594 scsi_id
->sbp2_lun
= ORB_SET_LUN(ud
->lun
);
1599 * This function is called in order to determine the max speed and packet
1600 * size we can use in our ORBs. Note, that we (the driver and host) only
1601 * initiate the transaction. The SBP-2 device actually transfers the data
1602 * (by reading from the DMA area we tell it). This means that the SBP-2
1603 * device decides the actual maximum data it can transfer. We just tell it
1604 * the speed that it needs to use, and the max_rec the host supports, and
1605 * it takes care of the rest.
1607 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*scsi_id
)
1609 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1611 SBP2_DEBUG("sbp2_max_speed_and_size");
1613 /* Initial setting comes from the hosts speed map */
1614 scsi_id
->speed_code
=
1615 hi
->host
->speed_map
[NODEID_TO_NODE(hi
->host
->node_id
) * 64 +
1616 NODEID_TO_NODE(scsi_id
->ne
->nodeid
)];
1618 /* Bump down our speed if the user requested it */
1619 if (scsi_id
->speed_code
> max_speed
) {
1620 scsi_id
->speed_code
= max_speed
;
1621 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1622 hpsb_speedto_str
[scsi_id
->speed_code
]);
1625 /* Payload size is the lesser of what our speed supports and what
1626 * our host supports. */
1627 scsi_id
->max_payload_size
=
1628 min(sbp2_speedto_max_payload
[scsi_id
->speed_code
],
1629 (u8
) (hi
->host
->csr
.max_rec
- 1));
1631 HPSB_DEBUG("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1632 NODE_BUS_ARGS(hi
->host
, scsi_id
->ne
->nodeid
),
1633 hpsb_speedto_str
[scsi_id
->speed_code
],
1634 1 << ((u32
) scsi_id
->max_payload_size
+ 2));
1640 * This function is called in order to perform a SBP-2 agent reset.
1642 static int sbp2_agent_reset(struct scsi_id_instance_data
*scsi_id
, int wait
)
1648 SBP2_DEBUG("sbp2_agent_reset");
1651 * Ok, let's write to the target's management agent register
1653 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1654 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1657 retval
= hpsb_node_write(scsi_id
->ne
, addr
, &data
, 4);
1659 retval
= sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, &data
, 4);
1662 SBP2_ERR("hpsb_node_write failed.\n");
1667 * Need to make sure orb pointer is written on next command
1669 scsi_id
->last_orb
= NULL
;
1674 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb
*orb
,
1675 struct sbp2scsi_host_info
*hi
,
1676 struct sbp2_command_info
*command
,
1677 unsigned int scsi_use_sg
,
1678 struct scatterlist
*sgpnt
,
1680 enum dma_data_direction dma_dir
)
1682 command
->dma_dir
= dma_dir
;
1683 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1684 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1686 /* Special case if only one element (and less than 64KB in size) */
1687 if ((scsi_use_sg
== 1) &&
1688 (sgpnt
[0].length
<= SBP2_MAX_SG_ELEMENT_LENGTH
)) {
1690 SBP2_DEBUG("Only one s/g element");
1691 command
->dma_size
= sgpnt
[0].length
;
1692 command
->dma_type
= CMD_DMA_PAGE
;
1693 command
->cmd_dma
= pci_map_page(hi
->host
->pdev
,
1698 SBP2_DMA_ALLOC("single page scatter element");
1700 orb
->data_descriptor_lo
= command
->cmd_dma
;
1701 orb
->misc
|= ORB_SET_DATA_SIZE(command
->dma_size
);
1704 struct sbp2_unrestricted_page_table
*sg_element
=
1705 &command
->scatter_gather_element
[0];
1706 u32 sg_count
, sg_len
;
1708 int i
, count
= pci_map_sg(hi
->host
->pdev
, sgpnt
, scsi_use_sg
,
1711 SBP2_DMA_ALLOC("scatter list");
1713 command
->dma_size
= scsi_use_sg
;
1714 command
->sge_buffer
= sgpnt
;
1716 /* use page tables (s/g) */
1717 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1718 orb
->data_descriptor_lo
= command
->sge_dma
;
1721 * Loop through and fill out our sbp-2 page tables
1722 * (and split up anything too large)
1724 for (i
= 0, sg_count
= 0 ; i
< count
; i
++, sgpnt
++) {
1725 sg_len
= sg_dma_len(sgpnt
);
1726 sg_addr
= sg_dma_address(sgpnt
);
1728 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1729 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1730 sg_element
[sg_count
].length_segment_base_hi
=
1731 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1732 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1733 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1735 sg_element
[sg_count
].length_segment_base_hi
=
1736 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1743 /* Number of page table (s/g) elements */
1744 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1746 sbp2util_packet_dump(sg_element
,
1747 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1748 "sbp2 s/g list", command
->sge_dma
);
1750 /* Byte swap page tables if necessary */
1751 sbp2util_cpu_to_be32_buffer(sg_element
,
1752 (sizeof(struct sbp2_unrestricted_page_table
)) *
1757 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb
*orb
,
1758 struct sbp2scsi_host_info
*hi
,
1759 struct sbp2_command_info
*command
,
1760 struct scatterlist
*sgpnt
,
1762 unsigned int scsi_request_bufflen
,
1763 void *scsi_request_buffer
,
1764 enum dma_data_direction dma_dir
)
1766 command
->dma_dir
= dma_dir
;
1767 command
->dma_size
= scsi_request_bufflen
;
1768 command
->dma_type
= CMD_DMA_SINGLE
;
1769 command
->cmd_dma
= pci_map_single(hi
->host
->pdev
, scsi_request_buffer
,
1770 command
->dma_size
, command
->dma_dir
);
1771 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1772 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1774 SBP2_DMA_ALLOC("single bulk");
1777 * Handle case where we get a command w/o s/g enabled (but
1778 * check for transfers larger than 64K)
1780 if (scsi_request_bufflen
<= SBP2_MAX_SG_ELEMENT_LENGTH
) {
1782 orb
->data_descriptor_lo
= command
->cmd_dma
;
1783 orb
->misc
|= ORB_SET_DATA_SIZE(scsi_request_bufflen
);
1786 struct sbp2_unrestricted_page_table
*sg_element
=
1787 &command
->scatter_gather_element
[0];
1788 u32 sg_count
, sg_len
;
1792 * Need to turn this into page tables, since the
1793 * buffer is too large.
1795 orb
->data_descriptor_lo
= command
->sge_dma
;
1797 /* Use page tables (s/g) */
1798 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1801 * fill out our sbp-2 page tables (and split up
1805 sg_len
= scsi_request_bufflen
;
1806 sg_addr
= command
->cmd_dma
;
1808 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1809 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1810 sg_element
[sg_count
].length_segment_base_hi
=
1811 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1812 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1813 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1815 sg_element
[sg_count
].length_segment_base_hi
=
1816 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1822 /* Number of page table (s/g) elements */
1823 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1825 sbp2util_packet_dump(sg_element
,
1826 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1827 "sbp2 s/g list", command
->sge_dma
);
1829 /* Byte swap page tables if necessary */
1830 sbp2util_cpu_to_be32_buffer(sg_element
,
1831 (sizeof(struct sbp2_unrestricted_page_table
)) *
1837 * This function is called to create the actual command orb and s/g list
1838 * out of the scsi command itself.
1840 static void sbp2_create_command_orb(struct scsi_id_instance_data
*scsi_id
,
1841 struct sbp2_command_info
*command
,
1843 unsigned int scsi_use_sg
,
1844 unsigned int scsi_request_bufflen
,
1845 void *scsi_request_buffer
,
1846 enum dma_data_direction dma_dir
)
1848 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1849 struct scatterlist
*sgpnt
= (struct scatterlist
*)scsi_request_buffer
;
1850 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1854 * Set-up our command ORB..
1856 * NOTE: We're doing unrestricted page tables (s/g), as this is
1857 * best performance (at least with the devices I have). This means
1858 * that data_size becomes the number of s/g elements, and
1859 * page_size should be zero (for unrestricted).
1861 command_orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1862 command_orb
->next_ORB_lo
= 0x0;
1863 command_orb
->misc
= ORB_SET_MAX_PAYLOAD(scsi_id
->max_payload_size
);
1864 command_orb
->misc
|= ORB_SET_SPEED(scsi_id
->speed_code
);
1865 command_orb
->misc
|= ORB_SET_NOTIFY(1); /* Notify us when complete */
1867 if (dma_dir
== DMA_NONE
)
1868 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1869 else if (dma_dir
== DMA_TO_DEVICE
&& scsi_request_bufflen
)
1870 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1871 else if (dma_dir
== DMA_FROM_DEVICE
&& scsi_request_bufflen
)
1872 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1874 SBP2_WARN("Falling back to DMA_NONE");
1875 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1878 /* Set-up our pagetable stuff */
1879 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1880 SBP2_DEBUG("No data transfer");
1881 command_orb
->data_descriptor_hi
= 0x0;
1882 command_orb
->data_descriptor_lo
= 0x0;
1883 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1884 } else if (scsi_use_sg
) {
1885 SBP2_DEBUG("Use scatter/gather");
1886 sbp2_prep_command_orb_sg(command_orb
, hi
, command
, scsi_use_sg
,
1887 sgpnt
, orb_direction
, dma_dir
);
1889 SBP2_DEBUG("No scatter/gather");
1890 sbp2_prep_command_orb_no_sg(command_orb
, hi
, command
, sgpnt
,
1891 orb_direction
, scsi_request_bufflen
,
1892 scsi_request_buffer
, dma_dir
);
1895 /* Byte swap command ORB if necessary */
1896 sbp2util_cpu_to_be32_buffer(command_orb
, sizeof(struct sbp2_command_orb
));
1898 /* Put our scsi command in the command ORB */
1899 memset(command_orb
->cdb
, 0, 12);
1900 memcpy(command_orb
->cdb
, scsi_cmd
, COMMAND_SIZE(*scsi_cmd
));
1904 * This function is called in order to begin a regular SBP-2 command.
1906 static int sbp2_link_orb_command(struct scsi_id_instance_data
*scsi_id
,
1907 struct sbp2_command_info
*command
)
1909 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1910 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1911 struct node_entry
*ne
= scsi_id
->ne
;
1914 outstanding_orb_incr
;
1915 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1916 command_orb
, global_outstanding_command_orbs
);
1918 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->command_orb_dma
,
1919 sizeof(struct sbp2_command_orb
),
1920 PCI_DMA_BIDIRECTIONAL
);
1921 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->sge_dma
,
1922 sizeof(command
->scatter_gather_element
),
1923 PCI_DMA_BIDIRECTIONAL
);
1925 * Check to see if there are any previous orbs to use
1927 if (scsi_id
->last_orb
== NULL
) {
1931 * Ok, let's write to the target's management agent register
1933 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_ORB_POINTER_OFFSET
;
1934 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1935 data
[1] = command
->command_orb_dma
;
1936 sbp2util_cpu_to_be32_buffer(data
, 8);
1938 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb
);
1940 if (sbp2util_node_write_no_wait(ne
, addr
, data
, 8) < 0) {
1941 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1945 SBP2_ORB_DEBUG("write command agent complete");
1947 scsi_id
->last_orb
= command_orb
;
1948 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1954 * We have an orb already sent (maybe or maybe not
1955 * processed) that we can append this orb to. So do so,
1956 * and ring the doorbell. Have to be very careful
1957 * modifying these next orb pointers, as they are accessed
1958 * both by the sbp2 device and us.
1960 scsi_id
->last_orb
->next_ORB_lo
=
1961 cpu_to_be32(command
->command_orb_dma
);
1962 /* Tells hardware that this pointer is valid */
1963 scsi_id
->last_orb
->next_ORB_hi
= 0x0;
1964 pci_dma_sync_single_for_device(hi
->host
->pdev
,
1965 scsi_id
->last_orb_dma
,
1966 sizeof(struct sbp2_command_orb
),
1967 PCI_DMA_BIDIRECTIONAL
);
1972 data
= cpu_to_be32(command
->command_orb_dma
);
1973 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_DOORBELL_OFFSET
;
1975 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb
);
1977 if (sbp2util_node_write_no_wait(ne
, addr
, &data
, 4) < 0) {
1978 SBP2_ERR("sbp2util_node_write_no_wait failed");
1982 scsi_id
->last_orb
= command_orb
;
1983 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1990 * This function is called in order to begin a regular SBP-2 command.
1992 static int sbp2_send_command(struct scsi_id_instance_data
*scsi_id
,
1993 struct scsi_cmnd
*SCpnt
,
1994 void (*done
)(struct scsi_cmnd
*))
1996 unchar
*cmd
= (unchar
*) SCpnt
->cmnd
;
1997 unsigned int request_bufflen
= SCpnt
->request_bufflen
;
1998 struct sbp2_command_info
*command
;
2000 SBP2_DEBUG("sbp2_send_command");
2001 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2002 printk("[scsi command]\n ");
2003 scsi_print_command(SCpnt
);
2005 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen
);
2006 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt
->use_sg
);
2009 * Allocate a command orb and s/g structure
2011 command
= sbp2util_allocate_command_orb(scsi_id
, SCpnt
, done
);
2017 * Now actually fill in the comamnd orb and sbp2 s/g list
2019 sbp2_create_command_orb(scsi_id
, command
, cmd
, SCpnt
->use_sg
,
2020 request_bufflen
, SCpnt
->request_buffer
,
2021 SCpnt
->sc_data_direction
);
2023 sbp2util_packet_dump(&command
->command_orb
, sizeof(struct sbp2_command_orb
),
2024 "sbp2 command orb", command
->command_orb_dma
);
2027 * Initialize status fifo
2029 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
2032 * Link up the orb, and ring the doorbell if needed
2034 sbp2_link_orb_command(scsi_id
, command
);
2040 * Translates SBP-2 status into SCSI sense data for check conditions
2042 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
, unchar
*sense_data
)
2044 SBP2_DEBUG("sbp2_status_to_sense_data");
2047 * Ok, it's pretty ugly... ;-)
2049 sense_data
[0] = 0x70;
2050 sense_data
[1] = 0x0;
2051 sense_data
[2] = sbp2_status
[9];
2052 sense_data
[3] = sbp2_status
[12];
2053 sense_data
[4] = sbp2_status
[13];
2054 sense_data
[5] = sbp2_status
[14];
2055 sense_data
[6] = sbp2_status
[15];
2057 sense_data
[8] = sbp2_status
[16];
2058 sense_data
[9] = sbp2_status
[17];
2059 sense_data
[10] = sbp2_status
[18];
2060 sense_data
[11] = sbp2_status
[19];
2061 sense_data
[12] = sbp2_status
[10];
2062 sense_data
[13] = sbp2_status
[11];
2063 sense_data
[14] = sbp2_status
[20];
2064 sense_data
[15] = sbp2_status
[21];
2066 return sbp2_status
[8] & 0x3f; /* return scsi status */
2070 * This function is called after a command is completed, in order to do any necessary SBP-2
2071 * response data translations for the SCSI stack
2073 static void sbp2_check_sbp2_response(struct scsi_id_instance_data
*scsi_id
,
2074 struct scsi_cmnd
*SCpnt
)
2076 u8
*scsi_buf
= SCpnt
->request_buffer
;
2078 SBP2_DEBUG("sbp2_check_sbp2_response");
2080 if (SCpnt
->cmnd
[0] == INQUIRY
&& (SCpnt
->cmnd
[1] & 3) == 0) {
2082 * Make sure data length is ok. Minimum length is 36 bytes
2084 if (scsi_buf
[4] == 0) {
2085 scsi_buf
[4] = 36 - 5;
2089 * Fix ansi revision and response data format
2092 scsi_buf
[3] = (scsi_buf
[3] & 0xf0) | 2;
2097 * This function deals with status writes from the SBP-2 device
2099 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
, int destid
,
2100 quadlet_t
*data
, u64 addr
, size_t length
, u16 fl
)
2102 struct sbp2scsi_host_info
*hi
;
2103 struct scsi_id_instance_data
*scsi_id
= NULL
, *scsi_id_tmp
;
2104 struct scsi_cmnd
*SCpnt
= NULL
;
2105 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
2106 struct sbp2_command_info
*command
;
2107 unsigned long flags
;
2109 SBP2_DEBUG("sbp2_handle_status_write");
2111 sbp2util_packet_dump(data
, length
, "sbp2 status write by device", (u32
)addr
);
2114 SBP2_ERR("host is NULL - this is bad!");
2115 return RCODE_ADDRESS_ERROR
;
2118 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
2121 SBP2_ERR("host info is NULL - this is bad!");
2122 return RCODE_ADDRESS_ERROR
;
2126 * Find our scsi_id structure by looking at the status fifo address
2127 * written to by the sbp2 device.
2129 list_for_each_entry(scsi_id_tmp
, &hi
->scsi_ids
, scsi_list
) {
2130 if (scsi_id_tmp
->ne
->nodeid
== nodeid
&&
2131 scsi_id_tmp
->status_fifo_addr
== addr
) {
2132 scsi_id
= scsi_id_tmp
;
2138 SBP2_ERR("scsi_id is NULL - device is gone?");
2139 return RCODE_ADDRESS_ERROR
;
2143 * Put response into scsi_id status fifo...
2145 memcpy(&scsi_id
->status_block
, data
, length
);
2148 * Byte swap first two quadlets (8 bytes) of status for processing
2150 sbp2util_be32_to_cpu_buffer(&scsi_id
->status_block
, 8);
2153 * Handle command ORB status here if necessary. First, need to match status with command.
2155 command
= sbp2util_find_command_for_orb(scsi_id
, scsi_id
->status_block
.ORB_offset_lo
);
2158 SBP2_DEBUG("Found status for command ORB");
2159 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2160 sizeof(struct sbp2_command_orb
),
2161 PCI_DMA_BIDIRECTIONAL
);
2162 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2163 sizeof(command
->scatter_gather_element
),
2164 PCI_DMA_BIDIRECTIONAL
);
2166 SBP2_ORB_DEBUG("matched command orb %p", &command
->command_orb
);
2167 outstanding_orb_decr
;
2170 * Matched status with command, now grab scsi command pointers and check status
2172 SCpnt
= command
->Current_SCpnt
;
2173 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2174 sbp2util_mark_command_completed(scsi_id
, command
);
2175 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2180 * See if the target stored any scsi status information
2182 if (STATUS_GET_LENGTH(scsi_id
->status_block
.ORB_offset_hi_misc
) > 1) {
2184 * Translate SBP-2 status to SCSI sense data
2186 SBP2_DEBUG("CHECK CONDITION");
2187 scsi_status
= sbp2_status_to_sense_data((unchar
*)&scsi_id
->status_block
, SCpnt
->sense_buffer
);
2191 * Check to see if the dead bit is set. If so, we'll have to initiate
2192 * a fetch agent reset.
2194 if (STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
2197 * Initiate a fetch agent reset.
2199 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2200 sbp2_agent_reset(scsi_id
, 0);
2203 SBP2_ORB_DEBUG("completing command orb %p", &command
->command_orb
);
2207 * Check here to see if there are no commands in-use. If there are none, we can
2208 * null out last orb so that next time around we write directly to the orb pointer...
2209 * Quick start saves one 1394 bus transaction.
2211 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2212 if (list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2213 scsi_id
->last_orb
= NULL
;
2215 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2220 * It's probably a login/logout/reconnect status.
2222 if ((scsi_id
->login_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2223 (scsi_id
->query_logins_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2224 (scsi_id
->reconnect_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2225 (scsi_id
->logout_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
)) {
2226 atomic_set(&scsi_id
->sbp2_login_complete
, 1);
2232 /* Complete the SCSI command. */
2233 SBP2_DEBUG("Completing SCSI command");
2234 sbp2scsi_complete_command(scsi_id
, scsi_status
, SCpnt
,
2235 command
->Current_done
);
2236 SBP2_ORB_DEBUG("command orb completed");
2239 return RCODE_COMPLETE
;
2242 /**************************************
2243 * SCSI interface related section
2244 **************************************/
2247 * This routine is the main request entry routine for doing I/O. It is
2248 * called from the scsi stack directly.
2250 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
2251 void (*done
)(struct scsi_cmnd
*))
2253 struct scsi_id_instance_data
*scsi_id
=
2254 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2255 struct sbp2scsi_host_info
*hi
;
2256 int result
= DID_NO_CONNECT
<< 16;
2258 SBP2_DEBUG("sbp2scsi_queuecommand");
2260 if (!sbp2util_node_is_available(scsi_id
))
2266 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2271 * Until we handle multiple luns, just return selection time-out
2272 * to any IO directed at non-zero LUNs
2274 if (SCpnt
->device
->lun
)
2278 * Check for request sense command, and handle it here
2279 * (autorequest sense)
2281 if (SCpnt
->cmnd
[0] == REQUEST_SENSE
) {
2282 SBP2_DEBUG("REQUEST_SENSE");
2283 memcpy(SCpnt
->request_buffer
, SCpnt
->sense_buffer
, SCpnt
->request_bufflen
);
2284 memset(SCpnt
->sense_buffer
, 0, sizeof(SCpnt
->sense_buffer
));
2285 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_GOOD
, SCpnt
, done
);
2290 * Check to see if we are in the middle of a bus reset.
2292 if (!hpsb_node_entry_valid(scsi_id
->ne
)) {
2293 SBP2_ERR("Bus reset in progress - rejecting command");
2294 result
= DID_BUS_BUSY
<< 16;
2299 * Bidirectional commands are not yet implemented,
2300 * and unknown transfer direction not handled.
2302 if (SCpnt
->sc_data_direction
== DMA_BIDIRECTIONAL
) {
2303 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2304 result
= DID_ERROR
<< 16;
2309 * Try and send our SCSI command
2311 if (sbp2_send_command(scsi_id
, SCpnt
, done
)) {
2312 SBP2_ERR("Error sending SCSI command");
2313 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
2319 SCpnt
->result
= result
;
2325 * This function is called in order to complete all outstanding SBP-2
2326 * commands (in case of resets, etc.).
2328 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
2331 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2332 struct list_head
*lh
;
2333 struct sbp2_command_info
*command
;
2334 unsigned long flags
;
2336 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2338 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2339 while (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2340 SBP2_DEBUG("Found pending command to complete");
2341 lh
= scsi_id
->sbp2_command_orb_inuse
.next
;
2342 command
= list_entry(lh
, struct sbp2_command_info
, list
);
2343 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2344 sizeof(struct sbp2_command_orb
),
2345 PCI_DMA_BIDIRECTIONAL
);
2346 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2347 sizeof(command
->scatter_gather_element
),
2348 PCI_DMA_BIDIRECTIONAL
);
2349 sbp2util_mark_command_completed(scsi_id
, command
);
2350 if (command
->Current_SCpnt
) {
2351 command
->Current_SCpnt
->result
= status
<< 16;
2352 command
->Current_done(command
->Current_SCpnt
);
2355 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2361 * This function is called in order to complete a regular SBP-2 command.
2363 * This can be called in interrupt context.
2365 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
2366 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
2367 void (*done
)(struct scsi_cmnd
*))
2369 SBP2_DEBUG("sbp2scsi_complete_command");
2375 SBP2_ERR("SCpnt is NULL");
2380 * If a bus reset is in progress and there was an error, don't
2381 * complete the command, just let it get retried at the end of the
2384 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2385 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2386 SBP2_ERR("Bus reset in progress - retry command later");
2391 * Switch on scsi status
2393 switch (scsi_status
) {
2394 case SBP2_SCSI_STATUS_GOOD
:
2395 SCpnt
->result
= DID_OK
;
2398 case SBP2_SCSI_STATUS_BUSY
:
2399 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2400 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2403 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
2404 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2405 SCpnt
->result
= CHECK_CONDITION
<< 1;
2410 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2411 scsi_print_command(SCpnt
);
2412 scsi_print_sense("bh", SCpnt
);
2417 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
2418 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2419 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2420 scsi_print_command(SCpnt
);
2423 case SBP2_SCSI_STATUS_CONDITION_MET
:
2424 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
2425 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
2426 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
2427 SCpnt
->result
= DID_ERROR
<< 16;
2428 scsi_print_command(SCpnt
);
2432 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
2433 SCpnt
->result
= DID_ERROR
<< 16;
2437 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2439 if (SCpnt
->result
== DID_OK
) {
2440 sbp2_check_sbp2_response(scsi_id
, SCpnt
);
2444 * If a bus reset is in progress and there was an error, complete
2445 * the command as busy so that it will get retried.
2447 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2448 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2449 SBP2_ERR("Completing command with busy (bus reset)");
2450 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2454 * If a unit attention occurs, return busy status so it gets
2455 * retried... it could have happened because of a 1394 bus reset
2459 if ((scsi_status
== SBP2_SCSI_STATUS_CHECK_CONDITION
) &&
2460 (SCpnt
->sense_buffer
[2] == UNIT_ATTENTION
)) {
2461 SBP2_DEBUG("UNIT ATTENTION - return busy");
2462 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2467 * Tell scsi stack that we're done with this command
2472 static int sbp2scsi_slave_alloc(struct scsi_device
*sdev
)
2474 struct scsi_id_instance_data
*scsi_id
=
2475 (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0];
2477 scsi_id
->sdev
= sdev
;
2479 if (force_inquiry_hack
||
2480 scsi_id
->workarounds
& SBP2_BREAKAGE_INQUIRY_HACK
) {
2481 sdev
->inquiry_len
= 36;
2482 sdev
->skip_ms_page_8
= 1;
2487 static int sbp2scsi_slave_configure(struct scsi_device
*sdev
)
2489 blk_queue_dma_alignment(sdev
->request_queue
, (512 - 1));
2490 sdev
->use_10_for_rw
= 1;
2491 sdev
->use_10_for_ms
= 1;
2495 static void sbp2scsi_slave_destroy(struct scsi_device
*sdev
)
2497 ((struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0])->sdev
= NULL
;
2502 * Called by scsi stack when something has really gone wrong. Usually
2503 * called when a command has timed-out for some reason.
2505 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2507 struct scsi_id_instance_data
*scsi_id
=
2508 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2509 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2510 struct sbp2_command_info
*command
;
2511 unsigned long flags
;
2513 SBP2_ERR("aborting sbp2 command");
2514 scsi_print_command(SCpnt
);
2516 if (sbp2util_node_is_available(scsi_id
)) {
2519 * Right now, just return any matching command structures
2522 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2523 command
= sbp2util_find_command_for_SCpnt(scsi_id
, SCpnt
);
2525 SBP2_DEBUG("Found command to abort");
2526 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2527 command
->command_orb_dma
,
2528 sizeof(struct sbp2_command_orb
),
2529 PCI_DMA_BIDIRECTIONAL
);
2530 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2532 sizeof(command
->scatter_gather_element
),
2533 PCI_DMA_BIDIRECTIONAL
);
2534 sbp2util_mark_command_completed(scsi_id
, command
);
2535 if (command
->Current_SCpnt
) {
2536 command
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2537 command
->Current_done(command
->Current_SCpnt
);
2540 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2543 * Initiate a fetch agent reset.
2545 sbp2_agent_reset(scsi_id
, 0);
2546 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
2553 * Called by scsi stack when something has really gone wrong.
2555 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2557 struct scsi_id_instance_data
*scsi_id
=
2558 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2560 SBP2_ERR("reset requested");
2562 if (sbp2util_node_is_available(scsi_id
)) {
2563 SBP2_ERR("Generating sbp2 fetch agent reset");
2564 sbp2_agent_reset(scsi_id
, 0);
2570 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
,
2571 struct device_attribute
*attr
,
2574 struct scsi_device
*sdev
;
2575 struct scsi_id_instance_data
*scsi_id
;
2578 if (!(sdev
= to_scsi_device(dev
)))
2581 if (!(scsi_id
= (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0]))
2584 lun
= ORB_SET_LUN(scsi_id
->sbp2_lun
);
2586 return sprintf(buf
, "%016Lx:%d:%d\n", (unsigned long long)scsi_id
->ne
->guid
,
2587 scsi_id
->ud
->id
, lun
);
2589 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
2591 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
2592 &dev_attr_ieee1394_id
,
2596 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2597 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2598 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2599 MODULE_LICENSE("GPL");
2601 /* SCSI host template */
2602 static struct scsi_host_template scsi_driver_template
= {
2603 .module
= THIS_MODULE
,
2604 .name
= "SBP-2 IEEE-1394",
2605 .proc_name
= SBP2_DEVICE_NAME
,
2606 .queuecommand
= sbp2scsi_queuecommand
,
2607 .eh_abort_handler
= sbp2scsi_abort
,
2608 .eh_device_reset_handler
= sbp2scsi_reset
,
2609 .slave_alloc
= sbp2scsi_slave_alloc
,
2610 .slave_configure
= sbp2scsi_slave_configure
,
2611 .slave_destroy
= sbp2scsi_slave_destroy
,
2613 .sg_tablesize
= SG_ALL
,
2614 .use_clustering
= ENABLE_CLUSTERING
,
2615 .cmd_per_lun
= SBP2_MAX_CMDS
,
2616 .can_queue
= SBP2_MAX_CMDS
,
2618 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
2621 static int sbp2_module_init(void)
2625 SBP2_DEBUG("sbp2_module_init");
2627 /* Module load debug option to force one command at a time (serializing I/O) */
2629 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2630 SBP2_INFO("Try serialize_io=0 for better performance");
2631 scsi_driver_template
.can_queue
= 1;
2632 scsi_driver_template
.cmd_per_lun
= 1;
2635 /* Set max sectors (module load option). Default is 255 sectors. */
2636 scsi_driver_template
.max_sectors
= max_sectors
;
2638 /* Register our high level driver with 1394 stack */
2639 hpsb_register_highlevel(&sbp2_highlevel
);
2641 ret
= hpsb_register_protocol(&sbp2_driver
);
2643 SBP2_ERR("Failed to register protocol");
2644 hpsb_unregister_highlevel(&sbp2_highlevel
);
2651 static void __exit
sbp2_module_exit(void)
2653 SBP2_DEBUG("sbp2_module_exit");
2655 hpsb_unregister_protocol(&sbp2_driver
);
2657 hpsb_unregister_highlevel(&sbp2_highlevel
);
2660 module_init(sbp2_module_init
);
2661 module_exit(sbp2_module_exit
);