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/kernel.h>
42 #include <linux/list.h>
43 #include <linux/string.h>
44 #include <linux/stringify.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>
58 #include <linux/wait.h>
60 #include <asm/current.h>
61 #include <asm/uaccess.h>
63 #include <asm/byteorder.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 = "
121 __stringify(SBP2_MAX_SECTORS
) ")");
124 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
125 * do an exclusive login, as it's generally unsafe to have two hosts
126 * talking to a single sbp2 device at the same time (filesystem coherency,
127 * etc.). If you're running an sbp2 device that supports multiple logins,
128 * and you're either running read-only filesystems or some sort of special
129 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
130 * File System, or Lustre, then set exclusive_login to zero.
132 * So far only bridges from Oxford Semiconductor are known to support
133 * concurrent logins. Depending on firmware, four or two concurrent logins
134 * are possible on OXFW911 and newer Oxsemi bridges.
136 static int exclusive_login
= 1;
137 module_param(exclusive_login
, int, 0644);
138 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device (default = 1)");
141 * If any of the following workarounds is required for your device to work,
142 * please submit the kernel messages logged by sbp2 to the linux1394-devel
145 * - 128kB max transfer
146 * Limit transfer size. Necessary for some old bridges.
149 * When scsi_mod probes the device, let the inquiry command look like that
153 * Suppress sending of mode_sense for mode page 8 if the device pretends to
154 * support the SCSI Primary Block commands instead of Reduced Block Commands.
157 * Tell sd_mod to correct the last sector number reported by read_capacity.
158 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
159 * Don't use this with devices which don't have this bug.
161 * - override internal blacklist
162 * Instead of adding to the built-in blacklist, use only the workarounds
163 * specified in the module load parameter.
164 * Useful if a blacklist entry interfered with a non-broken device.
166 static int sbp2_default_workarounds
;
167 module_param_named(workarounds
, sbp2_default_workarounds
, int, 0644);
168 MODULE_PARM_DESC(workarounds
, "Work around device bugs (default = 0"
169 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS
)
170 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36
)
171 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8
)
172 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY
)
173 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE
)
174 ", or a combination)");
176 /* legacy parameter */
177 static int force_inquiry_hack
;
178 module_param(force_inquiry_hack
, int, 0644);
179 MODULE_PARM_DESC(force_inquiry_hack
, "Deprecated, use 'workarounds'");
182 * Export information about protocols/devices supported by this driver.
184 static struct ieee1394_device_id sbp2_id_table
[] = {
186 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
| IEEE1394_MATCH_VERSION
,
187 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
188 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff},
192 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
195 * Debug levels, configured via kernel config, or enable here.
198 #define CONFIG_IEEE1394_SBP2_DEBUG 0
199 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
200 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
201 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
202 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
203 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
205 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
206 #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
207 static u32 global_outstanding_command_orbs
= 0;
208 #define outstanding_orb_incr global_outstanding_command_orbs++
209 #define outstanding_orb_decr global_outstanding_command_orbs--
211 #define SBP2_ORB_DEBUG(fmt, args...)
212 #define outstanding_orb_incr
213 #define outstanding_orb_decr
216 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
217 #define SBP2_DMA_ALLOC(fmt, args...) \
218 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
219 ++global_outstanding_dmas, ## args)
220 #define SBP2_DMA_FREE(fmt, args...) \
221 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
222 --global_outstanding_dmas, ## args)
223 static u32 global_outstanding_dmas
= 0;
225 #define SBP2_DMA_ALLOC(fmt, args...)
226 #define SBP2_DMA_FREE(fmt, args...)
229 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
230 #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
231 #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
232 #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
233 #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
234 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
235 #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
236 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
237 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
238 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
240 #define SBP2_DEBUG(fmt, args...)
241 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
242 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
243 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
246 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
247 #define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__)
253 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
256 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
257 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
258 void (*done
)(struct scsi_cmnd
*));
260 static struct scsi_host_template scsi_driver_template
;
262 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
264 static void sbp2_host_reset(struct hpsb_host
*host
);
266 static int sbp2_probe(struct device
*dev
);
267 static int sbp2_remove(struct device
*dev
);
268 static int sbp2_update(struct unit_directory
*ud
);
270 static struct hpsb_highlevel sbp2_highlevel
= {
271 .name
= SBP2_DEVICE_NAME
,
272 .host_reset
= sbp2_host_reset
,
275 static struct hpsb_address_ops sbp2_ops
= {
276 .write
= sbp2_handle_status_write
279 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
280 static struct hpsb_address_ops sbp2_physdma_ops
= {
281 .read
= sbp2_handle_physdma_read
,
282 .write
= sbp2_handle_physdma_write
,
286 static struct hpsb_protocol_driver sbp2_driver
= {
287 .name
= "SBP2 Driver",
288 .id_table
= sbp2_id_table
,
289 .update
= sbp2_update
,
291 .name
= SBP2_DEVICE_NAME
,
292 .bus
= &ieee1394_bus_type
,
294 .remove
= sbp2_remove
,
299 * List of devices with known bugs.
301 * The firmware_revision field, masked with 0xffff00, is the best indicator
302 * for the type of bridge chip of a device. It yields a few false positives
303 * but this did not break correctly behaving devices so far.
305 static const struct {
306 u32 firmware_revision
;
308 unsigned workarounds
;
309 } sbp2_workarounds_table
[] = {
310 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
311 .firmware_revision
= 0x002800,
312 .model_id
= 0x001010,
313 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
|
314 SBP2_WORKAROUND_MODE_SENSE_8
,
316 /* Initio bridges, actually only needed for some older ones */ {
317 .firmware_revision
= 0x000200,
318 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
,
320 /* Symbios bridge */ {
321 .firmware_revision
= 0xa0b800,
322 .workarounds
= SBP2_WORKAROUND_128K_MAX_TRANS
,
325 * Note about the following Apple iPod blacklist entries:
327 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
328 * matching logic treats 0 as a wildcard, we cannot match this ID
329 * without rewriting the matching routine. Fortunately these iPods
330 * do not feature the read_capacity bug according to one report.
331 * Read_capacity behaviour as well as model_id could change due to
332 * Apple-supplied firmware updates though.
334 /* iPod 4th generation */ {
335 .firmware_revision
= 0x0a2700,
336 .model_id
= 0x000021,
337 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
340 .firmware_revision
= 0x0a2700,
341 .model_id
= 0x000023,
342 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
345 .firmware_revision
= 0x0a2700,
346 .model_id
= 0x00007e,
347 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
351 /**************************************
352 * General utility functions
353 **************************************/
357 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
359 static inline void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
363 for (length
= (length
>> 2); length
--; )
364 temp
[length
] = be32_to_cpu(temp
[length
]);
370 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
372 static inline void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
376 for (length
= (length
>> 2); length
--; )
377 temp
[length
] = cpu_to_be32(temp
[length
]);
381 #else /* BIG_ENDIAN */
382 /* Why waste the cpu cycles? */
383 #define sbp2util_be32_to_cpu_buffer(x,y)
384 #define sbp2util_cpu_to_be32_buffer(x,y)
387 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
389 * Debug packet dump routine. Length is in bytes.
391 static void sbp2util_packet_dump(void *buffer
, int length
, char *dump_name
,
395 unsigned char *dump
= buffer
;
397 if (!dump
|| !length
|| !dump_name
)
401 printk("[%s, 0x%x]", dump_name
, dump_phys_addr
);
403 printk("[%s]", dump_name
);
404 for (i
= 0; i
< length
; i
++) {
413 printk("%02x ", (int)dump
[i
]);
420 #define sbp2util_packet_dump(w,x,y,z)
423 static DECLARE_WAIT_QUEUE_HEAD(access_wq
);
426 * Waits for completion of an SBP-2 access request.
427 * Returns nonzero if timed out or prematurely interrupted.
429 static int sbp2util_access_timeout(struct scsi_id_instance_data
*scsi_id
,
432 long leftover
= wait_event_interruptible_timeout(
433 access_wq
, scsi_id
->access_complete
, timeout
);
435 scsi_id
->access_complete
= 0;
436 return leftover
<= 0;
439 /* Frees an allocated packet */
440 static void sbp2_free_packet(struct hpsb_packet
*packet
)
442 hpsb_free_tlabel(packet
);
443 hpsb_free_packet(packet
);
446 /* This is much like hpsb_node_write(), except it ignores the response
447 * subaction and returns immediately. Can be used from interrupts.
449 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
450 quadlet_t
*buffer
, size_t length
)
452 struct hpsb_packet
*packet
;
454 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
,
455 addr
, buffer
, length
);
459 hpsb_set_packet_complete_task(packet
,
460 (void (*)(void *))sbp2_free_packet
,
463 hpsb_node_fill_packet(ne
, packet
);
465 if (hpsb_send_packet(packet
) < 0) {
466 sbp2_free_packet(packet
);
474 * This function is called to create a pool of command orbs used for
475 * command processing. It is called when a new sbp2 device is detected.
477 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
479 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
481 unsigned long flags
, orbs
;
482 struct sbp2_command_info
*command
;
484 orbs
= serialize_io
? 2 : SBP2_MAX_CMDS
;
486 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
487 for (i
= 0; i
< orbs
; i
++) {
488 command
= kzalloc(sizeof(*command
), GFP_ATOMIC
);
490 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
,
494 command
->command_orb_dma
=
495 pci_map_single(hi
->host
->pdev
, &command
->command_orb
,
496 sizeof(struct sbp2_command_orb
),
498 SBP2_DMA_ALLOC("single command orb DMA");
500 pci_map_single(hi
->host
->pdev
,
501 &command
->scatter_gather_element
,
502 sizeof(command
->scatter_gather_element
),
503 PCI_DMA_BIDIRECTIONAL
);
504 SBP2_DMA_ALLOC("scatter_gather_element");
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
);
513 * This function is called to delete a pool of command orbs.
515 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
517 struct hpsb_host
*host
= scsi_id
->hi
->host
;
518 struct list_head
*lh
, *next
;
519 struct sbp2_command_info
*command
;
522 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
523 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
524 list_for_each_safe(lh
, next
, &scsi_id
->sbp2_command_orb_completed
) {
525 command
= list_entry(lh
, struct sbp2_command_info
, list
);
527 /* Release our generic DMA's */
528 pci_unmap_single(host
->pdev
, command
->command_orb_dma
,
529 sizeof(struct sbp2_command_orb
),
531 SBP2_DMA_FREE("single command orb DMA");
532 pci_unmap_single(host
->pdev
, command
->sge_dma
,
533 sizeof(command
->scatter_gather_element
),
534 PCI_DMA_BIDIRECTIONAL
);
535 SBP2_DMA_FREE("scatter_gather_element");
540 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
545 * This function finds the sbp2_command for a given outstanding command
546 * orb.Only looks at the inuse list.
548 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
549 struct scsi_id_instance_data
*scsi_id
, dma_addr_t orb
)
551 struct sbp2_command_info
*command
;
554 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
555 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
556 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
) {
557 if (command
->command_orb_dma
== orb
) {
558 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
563 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
565 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb
);
571 * This function finds the sbp2_command for a given outstanding SCpnt.
572 * Only looks at the inuse list.
573 * Must be called with scsi_id->sbp2_command_orb_lock held.
575 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(
576 struct scsi_id_instance_data
*scsi_id
, void *SCpnt
)
578 struct sbp2_command_info
*command
;
580 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
))
581 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
)
582 if (command
->Current_SCpnt
== SCpnt
)
588 * This function allocates a command orb used to send a scsi command.
590 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
591 struct scsi_id_instance_data
*scsi_id
,
592 struct scsi_cmnd
*Current_SCpnt
,
593 void (*Current_done
)(struct scsi_cmnd
*))
595 struct list_head
*lh
;
596 struct sbp2_command_info
*command
= NULL
;
599 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
600 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
601 lh
= scsi_id
->sbp2_command_orb_completed
.next
;
603 command
= list_entry(lh
, struct sbp2_command_info
, list
);
604 command
->Current_done
= Current_done
;
605 command
->Current_SCpnt
= Current_SCpnt
;
606 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_inuse
);
608 SBP2_ERR("%s: no orbs available", __FUNCTION__
);
610 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
615 static void sbp2util_free_command_dma(struct sbp2_command_info
*command
)
617 struct scsi_id_instance_data
*scsi_id
=
618 (struct scsi_id_instance_data
*)command
->Current_SCpnt
->device
->host
->hostdata
[0];
619 struct hpsb_host
*host
;
622 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__
);
626 host
= scsi_id
->ud
->ne
->host
;
628 if (command
->cmd_dma
) {
629 if (command
->dma_type
== CMD_DMA_SINGLE
) {
630 pci_unmap_single(host
->pdev
, command
->cmd_dma
,
631 command
->dma_size
, command
->dma_dir
);
632 SBP2_DMA_FREE("single bulk");
633 } else if (command
->dma_type
== CMD_DMA_PAGE
) {
634 pci_unmap_page(host
->pdev
, command
->cmd_dma
,
635 command
->dma_size
, command
->dma_dir
);
636 SBP2_DMA_FREE("single page");
637 } /* XXX: Check for CMD_DMA_NONE bug */
638 command
->dma_type
= CMD_DMA_NONE
;
639 command
->cmd_dma
= 0;
642 if (command
->sge_buffer
) {
643 pci_unmap_sg(host
->pdev
, command
->sge_buffer
,
644 command
->dma_size
, command
->dma_dir
);
645 SBP2_DMA_FREE("scatter list");
646 command
->sge_buffer
= NULL
;
651 * This function moves a command to the completed orb list.
652 * Must be called with scsi_id->sbp2_command_orb_lock held.
654 static void sbp2util_mark_command_completed(
655 struct scsi_id_instance_data
*scsi_id
,
656 struct sbp2_command_info
*command
)
658 list_del(&command
->list
);
659 sbp2util_free_command_dma(command
);
660 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
664 * Is scsi_id valid? Is the 1394 node still present?
666 static inline int sbp2util_node_is_available(struct scsi_id_instance_data
*scsi_id
)
668 return scsi_id
&& scsi_id
->ne
&& !scsi_id
->ne
->in_limbo
;
671 /*********************************************
672 * IEEE-1394 core driver stack related section
673 *********************************************/
674 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
);
676 static int sbp2_probe(struct device
*dev
)
678 struct unit_directory
*ud
;
679 struct scsi_id_instance_data
*scsi_id
;
683 ud
= container_of(dev
, struct unit_directory
, device
);
685 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
687 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
690 scsi_id
= sbp2_alloc_device(ud
);
695 sbp2_parse_unit_directory(scsi_id
, ud
);
697 return sbp2_start_device(scsi_id
);
700 static int sbp2_remove(struct device
*dev
)
702 struct unit_directory
*ud
;
703 struct scsi_id_instance_data
*scsi_id
;
704 struct scsi_device
*sdev
;
708 ud
= container_of(dev
, struct unit_directory
, device
);
709 scsi_id
= ud
->device
.driver_data
;
713 if (scsi_id
->scsi_host
) {
714 /* Get rid of enqueued commands if there is no chance to
716 if (!sbp2util_node_is_available(scsi_id
))
717 sbp2scsi_complete_all_commands(scsi_id
, DID_NO_CONNECT
);
718 /* scsi_remove_device() will trigger shutdown functions of SCSI
719 * highlevel drivers which would deadlock if blocked. */
720 scsi_unblock_requests(scsi_id
->scsi_host
);
722 sdev
= scsi_id
->sdev
;
724 scsi_id
->sdev
= NULL
;
725 scsi_remove_device(sdev
);
728 sbp2_logout_device(scsi_id
);
729 sbp2_remove_device(scsi_id
);
734 static int sbp2_update(struct unit_directory
*ud
)
736 struct scsi_id_instance_data
*scsi_id
= ud
->device
.driver_data
;
740 if (sbp2_reconnect_device(scsi_id
)) {
743 * Ok, reconnect has failed. Perhaps we didn't
744 * reconnect fast enough. Try doing a regular login, but
745 * first do a logout just in case of any weirdness.
747 sbp2_logout_device(scsi_id
);
749 if (sbp2_login_device(scsi_id
)) {
750 /* Login failed too, just fail, and the backend
751 * will call our sbp2_remove for us */
752 SBP2_ERR("Failed to reconnect to sbp2 device!");
757 /* Set max retries to something large on the device. */
758 sbp2_set_busy_timeout(scsi_id
);
760 /* Do a SBP-2 fetch agent reset. */
761 sbp2_agent_reset(scsi_id
, 1);
763 /* Get the max speed and packet size that we can use. */
764 sbp2_max_speed_and_size(scsi_id
);
766 /* Complete any pending commands with busy (so they get
767 * retried) and remove them from our queue
769 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
771 /* Make sure we unblock requests (since this is likely after a bus
773 scsi_unblock_requests(scsi_id
->scsi_host
);
778 /* This functions is called by the sbp2_probe, for each new device. We now
779 * allocate one scsi host for each scsi_id (unit directory). */
780 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
)
782 struct sbp2scsi_host_info
*hi
;
783 struct Scsi_Host
*scsi_host
= NULL
;
784 struct scsi_id_instance_data
*scsi_id
= NULL
;
788 scsi_id
= kzalloc(sizeof(*scsi_id
), GFP_KERNEL
);
790 SBP2_ERR("failed to create scsi_id");
794 scsi_id
->ne
= ud
->ne
;
796 scsi_id
->speed_code
= IEEE1394_SPEED_100
;
797 scsi_id
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
798 scsi_id
->status_fifo_addr
= CSR1212_INVALID_ADDR_SPACE
;
799 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_inuse
);
800 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_completed
);
801 INIT_LIST_HEAD(&scsi_id
->scsi_list
);
802 spin_lock_init(&scsi_id
->sbp2_command_orb_lock
);
804 ud
->device
.driver_data
= scsi_id
;
806 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
808 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
, sizeof(*hi
));
810 SBP2_ERR("failed to allocate hostinfo");
813 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
814 hi
->host
= ud
->ne
->host
;
815 INIT_LIST_HEAD(&hi
->scsi_ids
);
817 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
818 /* Handle data movement if physical dma is not
819 * enabled or not supported on host controller */
820 if (!hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
,
822 0x0ULL
, 0xfffffffcULL
)) {
823 SBP2_ERR("failed to register lower 4GB address range");
829 /* Prevent unloading of the 1394 host */
830 if (!try_module_get(hi
->host
->driver
->owner
)) {
831 SBP2_ERR("failed to get a reference on 1394 host driver");
837 list_add_tail(&scsi_id
->scsi_list
, &hi
->scsi_ids
);
839 /* Register the status FIFO address range. We could use the same FIFO
840 * for targets at different nodes. However we need different FIFOs per
841 * target in order to support multi-unit devices.
842 * The FIFO is located out of the local host controller's physical range
843 * but, if possible, within the posted write area. Status writes will
844 * then be performed as unified transactions. This slightly reduces
845 * bandwidth usage, and some Prolific based devices seem to require it.
847 scsi_id
->status_fifo_addr
= hpsb_allocate_and_register_addrspace(
848 &sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
849 sizeof(struct sbp2_status_block
), sizeof(quadlet_t
),
850 ud
->ne
->host
->low_addr_space
, CSR1212_ALL_SPACE_END
);
851 if (scsi_id
->status_fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
852 SBP2_ERR("failed to allocate status FIFO address range");
856 /* Register our host with the SCSI stack. */
857 scsi_host
= scsi_host_alloc(&scsi_driver_template
,
858 sizeof(unsigned long));
860 SBP2_ERR("failed to register scsi host");
864 scsi_host
->hostdata
[0] = (unsigned long)scsi_id
;
866 if (!scsi_add_host(scsi_host
, &ud
->device
)) {
867 scsi_id
->scsi_host
= scsi_host
;
871 SBP2_ERR("failed to add scsi host");
872 scsi_host_put(scsi_host
);
875 sbp2_remove_device(scsi_id
);
879 static void sbp2_host_reset(struct hpsb_host
*host
)
881 struct sbp2scsi_host_info
*hi
;
882 struct scsi_id_instance_data
*scsi_id
;
884 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
887 list_for_each_entry(scsi_id
, &hi
->scsi_ids
, scsi_list
)
888 scsi_block_requests(scsi_id
->scsi_host
);
893 * This function is where we first pull the node unique ids, and then
894 * allocate memory and register a SBP-2 device.
896 static int sbp2_start_device(struct scsi_id_instance_data
*scsi_id
)
898 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
904 scsi_id
->login_response
=
905 pci_alloc_consistent(hi
->host
->pdev
,
906 sizeof(struct sbp2_login_response
),
907 &scsi_id
->login_response_dma
);
908 if (!scsi_id
->login_response
)
910 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
912 /* Query logins ORB DMA */
913 scsi_id
->query_logins_orb
=
914 pci_alloc_consistent(hi
->host
->pdev
,
915 sizeof(struct sbp2_query_logins_orb
),
916 &scsi_id
->query_logins_orb_dma
);
917 if (!scsi_id
->query_logins_orb
)
919 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
921 /* Query logins response DMA */
922 scsi_id
->query_logins_response
=
923 pci_alloc_consistent(hi
->host
->pdev
,
924 sizeof(struct sbp2_query_logins_response
),
925 &scsi_id
->query_logins_response_dma
);
926 if (!scsi_id
->query_logins_response
)
928 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
930 /* Reconnect ORB DMA */
931 scsi_id
->reconnect_orb
=
932 pci_alloc_consistent(hi
->host
->pdev
,
933 sizeof(struct sbp2_reconnect_orb
),
934 &scsi_id
->reconnect_orb_dma
);
935 if (!scsi_id
->reconnect_orb
)
937 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
940 scsi_id
->logout_orb
=
941 pci_alloc_consistent(hi
->host
->pdev
,
942 sizeof(struct sbp2_logout_orb
),
943 &scsi_id
->logout_orb_dma
);
944 if (!scsi_id
->logout_orb
)
946 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
950 pci_alloc_consistent(hi
->host
->pdev
,
951 sizeof(struct sbp2_login_orb
),
952 &scsi_id
->login_orb_dma
);
953 if (!scsi_id
->login_orb
)
955 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
957 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id
->ud
->id
);
960 * Create our command orb pool
962 if (sbp2util_create_command_orb_pool(scsi_id
)) {
963 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
964 sbp2_remove_device(scsi_id
);
968 /* Schedule a timeout here. The reason is that we may be so close
969 * to a bus reset, that the device is not available for logins.
970 * This can happen when the bus reset is caused by the host
971 * connected to the sbp2 device being removed. That host would
972 * have a certain amount of time to relogin before the sbp2 device
973 * allows someone else to login instead. One second makes sense. */
974 msleep_interruptible(1000);
975 if (signal_pending(current
)) {
976 sbp2_remove_device(scsi_id
);
981 * Login to the sbp-2 device
983 if (sbp2_login_device(scsi_id
)) {
984 /* Login failed, just remove the device. */
985 sbp2_remove_device(scsi_id
);
990 * Set max retries to something large on the device
992 sbp2_set_busy_timeout(scsi_id
);
995 * Do a SBP-2 fetch agent reset
997 sbp2_agent_reset(scsi_id
, 1);
1000 * Get the max speed and packet size that we can use
1002 sbp2_max_speed_and_size(scsi_id
);
1004 /* Add this device to the scsi layer now */
1005 error
= scsi_add_device(scsi_id
->scsi_host
, 0, scsi_id
->ud
->id
, 0);
1007 SBP2_ERR("scsi_add_device failed");
1008 sbp2_logout_device(scsi_id
);
1009 sbp2_remove_device(scsi_id
);
1016 SBP2_ERR("Could not allocate memory for scsi_id");
1017 sbp2_remove_device(scsi_id
);
1022 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
1024 static void sbp2_remove_device(struct scsi_id_instance_data
*scsi_id
)
1026 struct sbp2scsi_host_info
*hi
;
1035 /* This will remove our scsi device aswell */
1036 if (scsi_id
->scsi_host
) {
1037 scsi_remove_host(scsi_id
->scsi_host
);
1038 scsi_host_put(scsi_id
->scsi_host
);
1041 sbp2util_remove_command_orb_pool(scsi_id
);
1043 list_del(&scsi_id
->scsi_list
);
1045 if (scsi_id
->login_response
) {
1046 pci_free_consistent(hi
->host
->pdev
,
1047 sizeof(struct sbp2_login_response
),
1048 scsi_id
->login_response
,
1049 scsi_id
->login_response_dma
);
1050 SBP2_DMA_FREE("single login FIFO");
1053 if (scsi_id
->login_orb
) {
1054 pci_free_consistent(hi
->host
->pdev
,
1055 sizeof(struct sbp2_login_orb
),
1057 scsi_id
->login_orb_dma
);
1058 SBP2_DMA_FREE("single login ORB");
1061 if (scsi_id
->reconnect_orb
) {
1062 pci_free_consistent(hi
->host
->pdev
,
1063 sizeof(struct sbp2_reconnect_orb
),
1064 scsi_id
->reconnect_orb
,
1065 scsi_id
->reconnect_orb_dma
);
1066 SBP2_DMA_FREE("single reconnect orb");
1069 if (scsi_id
->logout_orb
) {
1070 pci_free_consistent(hi
->host
->pdev
,
1071 sizeof(struct sbp2_logout_orb
),
1072 scsi_id
->logout_orb
,
1073 scsi_id
->logout_orb_dma
);
1074 SBP2_DMA_FREE("single logout orb");
1077 if (scsi_id
->query_logins_orb
) {
1078 pci_free_consistent(hi
->host
->pdev
,
1079 sizeof(struct sbp2_query_logins_orb
),
1080 scsi_id
->query_logins_orb
,
1081 scsi_id
->query_logins_orb_dma
);
1082 SBP2_DMA_FREE("single query logins orb");
1085 if (scsi_id
->query_logins_response
) {
1086 pci_free_consistent(hi
->host
->pdev
,
1087 sizeof(struct sbp2_query_logins_response
),
1088 scsi_id
->query_logins_response
,
1089 scsi_id
->query_logins_response_dma
);
1090 SBP2_DMA_FREE("single query logins data");
1093 if (scsi_id
->status_fifo_addr
!= CSR1212_INVALID_ADDR_SPACE
)
1094 hpsb_unregister_addrspace(&sbp2_highlevel
, hi
->host
,
1095 scsi_id
->status_fifo_addr
);
1097 scsi_id
->ud
->device
.driver_data
= NULL
;
1100 module_put(hi
->host
->driver
->owner
);
1102 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id
->ud
->id
);
1107 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1109 * This function deals with physical dma write requests (for adapters that do not support
1110 * physical dma in hardware). Mostly just here for debugging...
1112 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
,
1113 int destid
, quadlet_t
*data
, u64 addr
,
1114 size_t length
, u16 flags
)
1118 * Manually put the data in the right place.
1120 memcpy(bus_to_virt((u32
) addr
), data
, length
);
1121 sbp2util_packet_dump(data
, length
, "sbp2 phys dma write by device",
1123 return RCODE_COMPLETE
;
1127 * This function deals with physical dma read requests (for adapters that do not support
1128 * physical dma in hardware). Mostly just here for debugging...
1130 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
,
1131 quadlet_t
*data
, u64 addr
, size_t length
,
1136 * Grab data from memory and send a read response.
1138 memcpy(data
, bus_to_virt((u32
) addr
), length
);
1139 sbp2util_packet_dump(data
, length
, "sbp2 phys dma read by device",
1141 return RCODE_COMPLETE
;
1145 /**************************************
1146 * SBP-2 protocol related section
1147 **************************************/
1150 * This function queries the device for the maximum concurrent logins it
1153 static int sbp2_query_logins(struct scsi_id_instance_data
*scsi_id
)
1155 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1162 scsi_id
->query_logins_orb
->reserved1
= 0x0;
1163 scsi_id
->query_logins_orb
->reserved2
= 0x0;
1165 scsi_id
->query_logins_orb
->query_response_lo
= scsi_id
->query_logins_response_dma
;
1166 scsi_id
->query_logins_orb
->query_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1168 scsi_id
->query_logins_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1169 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1170 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1172 scsi_id
->query_logins_orb
->reserved_resp_length
=
1173 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response
));
1175 scsi_id
->query_logins_orb
->status_fifo_hi
=
1176 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1177 scsi_id
->query_logins_orb
->status_fifo_lo
=
1178 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1180 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
));
1182 sbp2util_packet_dump(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
),
1183 "sbp2 query logins orb", scsi_id
->query_logins_orb_dma
);
1185 memset(scsi_id
->query_logins_response
, 0, sizeof(struct sbp2_query_logins_response
));
1187 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1188 data
[1] = scsi_id
->query_logins_orb_dma
;
1189 sbp2util_cpu_to_be32_buffer(data
, 8);
1191 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1193 if (sbp2util_access_timeout(scsi_id
, 2*HZ
)) {
1194 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1198 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->query_logins_orb_dma
) {
1199 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1203 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1204 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1208 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_response
, sizeof(struct sbp2_query_logins_response
));
1210 SBP2_DEBUG("length_max_logins = %x",
1211 (unsigned int)scsi_id
->query_logins_response
->length_max_logins
);
1213 max_logins
= RESPONSE_GET_MAX_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1214 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins
);
1216 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1217 SBP2_INFO("Number of active logins: %d", active_logins
);
1219 if (active_logins
>= max_logins
) {
1227 * This function is called in order to login to a particular SBP-2 device,
1228 * after a bus reset.
1230 static int sbp2_login_device(struct scsi_id_instance_data
*scsi_id
)
1232 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1237 if (!scsi_id
->login_orb
) {
1238 SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__
);
1242 if (!exclusive_login
) {
1243 if (sbp2_query_logins(scsi_id
)) {
1244 SBP2_INFO("Device does not support any more concurrent logins");
1249 /* Set-up login ORB, assume no password */
1250 scsi_id
->login_orb
->password_hi
= 0;
1251 scsi_id
->login_orb
->password_lo
= 0;
1253 scsi_id
->login_orb
->login_response_lo
= scsi_id
->login_response_dma
;
1254 scsi_id
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1256 scsi_id
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1257 scsi_id
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0); /* One second reconnect time */
1258 scsi_id
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(exclusive_login
); /* Exclusive access to device */
1259 scsi_id
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1260 scsi_id
->login_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1262 scsi_id
->login_orb
->passwd_resp_lengths
=
1263 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1265 scsi_id
->login_orb
->status_fifo_hi
=
1266 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1267 scsi_id
->login_orb
->status_fifo_lo
=
1268 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1270 sbp2util_cpu_to_be32_buffer(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
));
1272 sbp2util_packet_dump(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
),
1273 "sbp2 login orb", scsi_id
->login_orb_dma
);
1275 memset(scsi_id
->login_response
, 0, sizeof(struct sbp2_login_response
));
1277 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1278 data
[1] = scsi_id
->login_orb_dma
;
1279 sbp2util_cpu_to_be32_buffer(data
, 8);
1281 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1284 * Wait for login status (up to 20 seconds)...
1286 if (sbp2util_access_timeout(scsi_id
, 20*HZ
)) {
1287 SBP2_ERR("Error logging into SBP-2 device - timed out");
1292 * Sanity. Make sure status returned matches login orb.
1294 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->login_orb_dma
) {
1295 SBP2_ERR("Error logging into SBP-2 device - timed out");
1299 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1300 SBP2_ERR("Error logging into SBP-2 device - failed");
1305 * Byte swap the login response, for use when reconnecting or
1308 sbp2util_cpu_to_be32_buffer(scsi_id
->login_response
, sizeof(struct sbp2_login_response
));
1311 * Grab our command block agent address from the login response.
1313 SBP2_DEBUG("command_block_agent_hi = %x",
1314 (unsigned int)scsi_id
->login_response
->command_block_agent_hi
);
1315 SBP2_DEBUG("command_block_agent_lo = %x",
1316 (unsigned int)scsi_id
->login_response
->command_block_agent_lo
);
1318 scsi_id
->sbp2_command_block_agent_addr
=
1319 ((u64
)scsi_id
->login_response
->command_block_agent_hi
) << 32;
1320 scsi_id
->sbp2_command_block_agent_addr
|= ((u64
)scsi_id
->login_response
->command_block_agent_lo
);
1321 scsi_id
->sbp2_command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1323 SBP2_INFO("Logged into SBP-2 device");
1328 * This function is called in order to logout from a particular SBP-2
1329 * device, usually called during driver unload.
1331 static int sbp2_logout_device(struct scsi_id_instance_data
*scsi_id
)
1333 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1342 scsi_id
->logout_orb
->reserved1
= 0x0;
1343 scsi_id
->logout_orb
->reserved2
= 0x0;
1344 scsi_id
->logout_orb
->reserved3
= 0x0;
1345 scsi_id
->logout_orb
->reserved4
= 0x0;
1347 scsi_id
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1348 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1350 /* Notify us when complete */
1351 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1353 scsi_id
->logout_orb
->reserved5
= 0x0;
1354 scsi_id
->logout_orb
->status_fifo_hi
=
1355 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1356 scsi_id
->logout_orb
->status_fifo_lo
=
1357 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1360 * Byte swap ORB if necessary
1362 sbp2util_cpu_to_be32_buffer(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
));
1364 sbp2util_packet_dump(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
),
1365 "sbp2 logout orb", scsi_id
->logout_orb_dma
);
1368 * Ok, let's write to the target's management agent register
1370 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1371 data
[1] = scsi_id
->logout_orb_dma
;
1372 sbp2util_cpu_to_be32_buffer(data
, 8);
1374 error
= hpsb_node_write(scsi_id
->ne
,
1375 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1379 /* Wait for device to logout...1 second. */
1380 if (sbp2util_access_timeout(scsi_id
, HZ
))
1383 SBP2_INFO("Logged out of SBP-2 device");
1388 * This function is called in order to reconnect to a particular SBP-2
1389 * device, after a bus reset.
1391 static int sbp2_reconnect_device(struct scsi_id_instance_data
*scsi_id
)
1393 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1400 * Set-up reconnect ORB
1402 scsi_id
->reconnect_orb
->reserved1
= 0x0;
1403 scsi_id
->reconnect_orb
->reserved2
= 0x0;
1404 scsi_id
->reconnect_orb
->reserved3
= 0x0;
1405 scsi_id
->reconnect_orb
->reserved4
= 0x0;
1407 scsi_id
->reconnect_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1408 scsi_id
->reconnect_orb
->login_ID_misc
|=
1409 ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1411 /* Notify us when complete */
1412 scsi_id
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1414 scsi_id
->reconnect_orb
->reserved5
= 0x0;
1415 scsi_id
->reconnect_orb
->status_fifo_hi
=
1416 ORB_SET_STATUS_FIFO_HI(scsi_id
->status_fifo_addr
, hi
->host
->node_id
);
1417 scsi_id
->reconnect_orb
->status_fifo_lo
=
1418 ORB_SET_STATUS_FIFO_LO(scsi_id
->status_fifo_addr
);
1421 * Byte swap ORB if necessary
1423 sbp2util_cpu_to_be32_buffer(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
));
1425 sbp2util_packet_dump(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
),
1426 "sbp2 reconnect orb", scsi_id
->reconnect_orb_dma
);
1428 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1429 data
[1] = scsi_id
->reconnect_orb_dma
;
1430 sbp2util_cpu_to_be32_buffer(data
, 8);
1432 error
= hpsb_node_write(scsi_id
->ne
,
1433 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1438 * Wait for reconnect status (up to 1 second)...
1440 if (sbp2util_access_timeout(scsi_id
, HZ
)) {
1441 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1446 * Sanity. Make sure status returned matches reconnect orb.
1448 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->reconnect_orb_dma
) {
1449 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1453 if (STATUS_TEST_RDS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1454 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1458 HPSB_DEBUG("Reconnected to SBP-2 device");
1463 * This function is called in order to set the busy timeout (number of
1464 * retries to attempt) on the sbp2 device.
1466 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*scsi_id
)
1472 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1473 if (hpsb_node_write(scsi_id
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4))
1474 SBP2_ERR("%s error", __FUNCTION__
);
1479 * This function is called to parse sbp2 device's config rom unit
1480 * directory. Used to determine things like sbp2 management agent offset,
1481 * and command set used (SCSI or RBC).
1483 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*scsi_id
,
1484 struct unit_directory
*ud
)
1486 struct csr1212_keyval
*kv
;
1487 struct csr1212_dentry
*dentry
;
1488 u64 management_agent_addr
;
1489 u32 command_set_spec_id
, command_set
, unit_characteristics
,
1491 unsigned workarounds
;
1496 management_agent_addr
= 0x0;
1497 command_set_spec_id
= 0x0;
1499 unit_characteristics
= 0x0;
1500 firmware_revision
= 0x0;
1502 /* Handle different fields in the unit directory, based on keys */
1503 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1504 switch (kv
->key
.id
) {
1505 case CSR1212_KV_ID_DEPENDENT_INFO
:
1506 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
) {
1507 /* Save off the management agent address */
1508 management_agent_addr
=
1509 CSR1212_REGISTER_SPACE_BASE
+
1510 (kv
->value
.csr_offset
<< 2);
1512 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1513 (unsigned int)management_agent_addr
);
1514 } else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1516 ORB_SET_LUN(kv
->value
.immediate
);
1520 case SBP2_COMMAND_SET_SPEC_ID_KEY
:
1521 /* Command spec organization */
1522 command_set_spec_id
= kv
->value
.immediate
;
1523 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1524 (unsigned int)command_set_spec_id
);
1527 case SBP2_COMMAND_SET_KEY
:
1528 /* Command set used by sbp2 device */
1529 command_set
= kv
->value
.immediate
;
1530 SBP2_DEBUG("sbp2_command_set = %x",
1531 (unsigned int)command_set
);
1534 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1536 * Unit characterisitcs (orb related stuff
1537 * that I'm not yet paying attention to)
1539 unit_characteristics
= kv
->value
.immediate
;
1540 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1541 (unsigned int)unit_characteristics
);
1544 case SBP2_FIRMWARE_REVISION_KEY
:
1545 /* Firmware revision */
1546 firmware_revision
= kv
->value
.immediate
;
1547 SBP2_DEBUG("sbp2_firmware_revision = %x",
1548 (unsigned int)firmware_revision
);
1556 workarounds
= sbp2_default_workarounds
;
1557 if (force_inquiry_hack
) {
1558 SBP2_WARN("force_inquiry_hack is deprecated. "
1559 "Use parameter 'workarounds' instead.");
1560 workarounds
|= SBP2_WORKAROUND_INQUIRY_36
;
1563 if (!(workarounds
& SBP2_WORKAROUND_OVERRIDE
))
1564 for (i
= 0; i
< ARRAY_SIZE(sbp2_workarounds_table
); i
++) {
1565 if (sbp2_workarounds_table
[i
].firmware_revision
&&
1566 sbp2_workarounds_table
[i
].firmware_revision
!=
1567 (firmware_revision
& 0xffff00))
1569 if (sbp2_workarounds_table
[i
].model_id
&&
1570 sbp2_workarounds_table
[i
].model_id
!= ud
->model_id
)
1572 workarounds
|= sbp2_workarounds_table
[i
].workarounds
;
1577 SBP2_INFO("Workarounds for node " NODE_BUS_FMT
": 0x%x "
1578 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1579 " model_id 0x%06x)",
1580 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1581 workarounds
, firmware_revision
,
1582 ud
->vendor_id
? ud
->vendor_id
: ud
->ne
->vendor_id
,
1585 /* We would need one SCSI host template for each target to adjust
1586 * max_sectors on the fly, therefore warn only. */
1587 if (workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
&&
1588 (max_sectors
* 512) > (128 * 1024))
1589 SBP2_WARN("Node " NODE_BUS_FMT
": Bridge only supports 128KB "
1590 "max transfer size. WARNING: Current max_sectors "
1591 "setting is larger than 128KB (%d sectors)",
1592 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1595 /* If this is a logical unit directory entry, process the parent
1596 * to get the values. */
1597 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1598 struct unit_directory
*parent_ud
=
1599 container_of(ud
->device
.parent
, struct unit_directory
, device
);
1600 sbp2_parse_unit_directory(scsi_id
, parent_ud
);
1602 scsi_id
->sbp2_management_agent_addr
= management_agent_addr
;
1603 scsi_id
->sbp2_command_set_spec_id
= command_set_spec_id
;
1604 scsi_id
->sbp2_command_set
= command_set
;
1605 scsi_id
->sbp2_unit_characteristics
= unit_characteristics
;
1606 scsi_id
->sbp2_firmware_revision
= firmware_revision
;
1607 scsi_id
->workarounds
= workarounds
;
1608 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1609 scsi_id
->sbp2_lun
= ORB_SET_LUN(ud
->lun
);
1613 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1616 * This function is called in order to determine the max speed and packet
1617 * size we can use in our ORBs. Note, that we (the driver and host) only
1618 * initiate the transaction. The SBP-2 device actually transfers the data
1619 * (by reading from the DMA area we tell it). This means that the SBP-2
1620 * device decides the actual maximum data it can transfer. We just tell it
1621 * the speed that it needs to use, and the max_rec the host supports, and
1622 * it takes care of the rest.
1624 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*scsi_id
)
1626 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1631 scsi_id
->speed_code
=
1632 hi
->host
->speed
[NODEID_TO_NODE(scsi_id
->ne
->nodeid
)];
1634 /* Bump down our speed if the user requested it */
1635 if (scsi_id
->speed_code
> max_speed
) {
1636 scsi_id
->speed_code
= max_speed
;
1637 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1638 hpsb_speedto_str
[scsi_id
->speed_code
]);
1641 /* Payload size is the lesser of what our speed supports and what
1642 * our host supports. */
1643 payload
= min(sbp2_speedto_max_payload
[scsi_id
->speed_code
],
1644 (u8
) (hi
->host
->csr
.max_rec
- 1));
1646 /* If physical DMA is off, work around limitation in ohci1394:
1647 * packet size must not exceed PAGE_SIZE */
1648 if (scsi_id
->ne
->host
->low_addr_space
< (1ULL << 32))
1649 while (SBP2_PAYLOAD_TO_BYTES(payload
) + 24 > PAGE_SIZE
&&
1653 HPSB_DEBUG("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1654 NODE_BUS_ARGS(hi
->host
, scsi_id
->ne
->nodeid
),
1655 hpsb_speedto_str
[scsi_id
->speed_code
],
1656 SBP2_PAYLOAD_TO_BYTES(payload
));
1658 scsi_id
->max_payload_size
= payload
;
1663 * This function is called in order to perform a SBP-2 agent reset.
1665 static int sbp2_agent_reset(struct scsi_id_instance_data
*scsi_id
, int wait
)
1670 unsigned long flags
;
1674 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1675 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1678 retval
= hpsb_node_write(scsi_id
->ne
, addr
, &data
, 4);
1680 retval
= sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, &data
, 4);
1683 SBP2_ERR("hpsb_node_write failed.\n");
1688 * Need to make sure orb pointer is written on next command
1690 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1691 scsi_id
->last_orb
= NULL
;
1692 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1697 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb
*orb
,
1698 struct sbp2scsi_host_info
*hi
,
1699 struct sbp2_command_info
*command
,
1700 unsigned int scsi_use_sg
,
1701 struct scatterlist
*sgpnt
,
1703 enum dma_data_direction dma_dir
)
1705 command
->dma_dir
= dma_dir
;
1706 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1707 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1709 /* Special case if only one element (and less than 64KB in size) */
1710 if ((scsi_use_sg
== 1) &&
1711 (sgpnt
[0].length
<= SBP2_MAX_SG_ELEMENT_LENGTH
)) {
1713 SBP2_DEBUG("Only one s/g element");
1714 command
->dma_size
= sgpnt
[0].length
;
1715 command
->dma_type
= CMD_DMA_PAGE
;
1716 command
->cmd_dma
= pci_map_page(hi
->host
->pdev
,
1721 SBP2_DMA_ALLOC("single page scatter element");
1723 orb
->data_descriptor_lo
= command
->cmd_dma
;
1724 orb
->misc
|= ORB_SET_DATA_SIZE(command
->dma_size
);
1727 struct sbp2_unrestricted_page_table
*sg_element
=
1728 &command
->scatter_gather_element
[0];
1729 u32 sg_count
, sg_len
;
1731 int i
, count
= pci_map_sg(hi
->host
->pdev
, sgpnt
, scsi_use_sg
,
1734 SBP2_DMA_ALLOC("scatter list");
1736 command
->dma_size
= scsi_use_sg
;
1737 command
->sge_buffer
= sgpnt
;
1739 /* use page tables (s/g) */
1740 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1741 orb
->data_descriptor_lo
= command
->sge_dma
;
1744 * Loop through and fill out our sbp-2 page tables
1745 * (and split up anything too large)
1747 for (i
= 0, sg_count
= 0 ; i
< count
; i
++, sgpnt
++) {
1748 sg_len
= sg_dma_len(sgpnt
);
1749 sg_addr
= sg_dma_address(sgpnt
);
1751 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1752 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1753 sg_element
[sg_count
].length_segment_base_hi
=
1754 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1755 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1756 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1758 sg_element
[sg_count
].length_segment_base_hi
=
1759 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1766 /* Number of page table (s/g) elements */
1767 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1769 sbp2util_packet_dump(sg_element
,
1770 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1771 "sbp2 s/g list", command
->sge_dma
);
1773 /* Byte swap page tables if necessary */
1774 sbp2util_cpu_to_be32_buffer(sg_element
,
1775 (sizeof(struct sbp2_unrestricted_page_table
)) *
1780 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb
*orb
,
1781 struct sbp2scsi_host_info
*hi
,
1782 struct sbp2_command_info
*command
,
1783 struct scatterlist
*sgpnt
,
1785 unsigned int scsi_request_bufflen
,
1786 void *scsi_request_buffer
,
1787 enum dma_data_direction dma_dir
)
1789 command
->dma_dir
= dma_dir
;
1790 command
->dma_size
= scsi_request_bufflen
;
1791 command
->dma_type
= CMD_DMA_SINGLE
;
1792 command
->cmd_dma
= pci_map_single(hi
->host
->pdev
, scsi_request_buffer
,
1793 command
->dma_size
, command
->dma_dir
);
1794 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1795 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1797 SBP2_DMA_ALLOC("single bulk");
1800 * Handle case where we get a command w/o s/g enabled (but
1801 * check for transfers larger than 64K)
1803 if (scsi_request_bufflen
<= SBP2_MAX_SG_ELEMENT_LENGTH
) {
1805 orb
->data_descriptor_lo
= command
->cmd_dma
;
1806 orb
->misc
|= ORB_SET_DATA_SIZE(scsi_request_bufflen
);
1809 struct sbp2_unrestricted_page_table
*sg_element
=
1810 &command
->scatter_gather_element
[0];
1811 u32 sg_count
, sg_len
;
1815 * Need to turn this into page tables, since the
1816 * buffer is too large.
1818 orb
->data_descriptor_lo
= command
->sge_dma
;
1820 /* Use page tables (s/g) */
1821 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1824 * fill out our sbp-2 page tables (and split up
1828 sg_len
= scsi_request_bufflen
;
1829 sg_addr
= command
->cmd_dma
;
1831 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1832 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1833 sg_element
[sg_count
].length_segment_base_hi
=
1834 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1835 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1836 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1838 sg_element
[sg_count
].length_segment_base_hi
=
1839 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1845 /* Number of page table (s/g) elements */
1846 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1848 sbp2util_packet_dump(sg_element
,
1849 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1850 "sbp2 s/g list", command
->sge_dma
);
1852 /* Byte swap page tables if necessary */
1853 sbp2util_cpu_to_be32_buffer(sg_element
,
1854 (sizeof(struct sbp2_unrestricted_page_table
)) *
1860 * This function is called to create the actual command orb and s/g list
1861 * out of the scsi command itself.
1863 static void sbp2_create_command_orb(struct scsi_id_instance_data
*scsi_id
,
1864 struct sbp2_command_info
*command
,
1866 unsigned int scsi_use_sg
,
1867 unsigned int scsi_request_bufflen
,
1868 void *scsi_request_buffer
,
1869 enum dma_data_direction dma_dir
)
1871 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1872 struct scatterlist
*sgpnt
= (struct scatterlist
*)scsi_request_buffer
;
1873 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1877 * Set-up our command ORB..
1879 * NOTE: We're doing unrestricted page tables (s/g), as this is
1880 * best performance (at least with the devices I have). This means
1881 * that data_size becomes the number of s/g elements, and
1882 * page_size should be zero (for unrestricted).
1884 command_orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1885 command_orb
->next_ORB_lo
= 0x0;
1886 command_orb
->misc
= ORB_SET_MAX_PAYLOAD(scsi_id
->max_payload_size
);
1887 command_orb
->misc
|= ORB_SET_SPEED(scsi_id
->speed_code
);
1888 command_orb
->misc
|= ORB_SET_NOTIFY(1); /* Notify us when complete */
1890 if (dma_dir
== DMA_NONE
)
1891 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1892 else if (dma_dir
== DMA_TO_DEVICE
&& scsi_request_bufflen
)
1893 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1894 else if (dma_dir
== DMA_FROM_DEVICE
&& scsi_request_bufflen
)
1895 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1897 SBP2_WARN("Falling back to DMA_NONE");
1898 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1901 /* Set-up our pagetable stuff */
1902 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1903 SBP2_DEBUG("No data transfer");
1904 command_orb
->data_descriptor_hi
= 0x0;
1905 command_orb
->data_descriptor_lo
= 0x0;
1906 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1907 } else if (scsi_use_sg
) {
1908 SBP2_DEBUG("Use scatter/gather");
1909 sbp2_prep_command_orb_sg(command_orb
, hi
, command
, scsi_use_sg
,
1910 sgpnt
, orb_direction
, dma_dir
);
1912 SBP2_DEBUG("No scatter/gather");
1913 sbp2_prep_command_orb_no_sg(command_orb
, hi
, command
, sgpnt
,
1914 orb_direction
, scsi_request_bufflen
,
1915 scsi_request_buffer
, dma_dir
);
1918 /* Byte swap command ORB if necessary */
1919 sbp2util_cpu_to_be32_buffer(command_orb
, sizeof(struct sbp2_command_orb
));
1921 /* Put our scsi command in the command ORB */
1922 memset(command_orb
->cdb
, 0, 12);
1923 memcpy(command_orb
->cdb
, scsi_cmd
, COMMAND_SIZE(*scsi_cmd
));
1927 * This function is called in order to begin a regular SBP-2 command.
1929 static void sbp2_link_orb_command(struct scsi_id_instance_data
*scsi_id
,
1930 struct sbp2_command_info
*command
)
1932 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1933 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1934 struct sbp2_command_orb
*last_orb
;
1935 dma_addr_t last_orb_dma
;
1936 u64 addr
= scsi_id
->sbp2_command_block_agent_addr
;
1939 unsigned long flags
;
1941 outstanding_orb_incr
;
1942 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1943 command_orb
, global_outstanding_command_orbs
);
1945 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->command_orb_dma
,
1946 sizeof(struct sbp2_command_orb
),
1948 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->sge_dma
,
1949 sizeof(command
->scatter_gather_element
),
1950 PCI_DMA_BIDIRECTIONAL
);
1952 * Check to see if there are any previous orbs to use
1954 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
1955 last_orb
= scsi_id
->last_orb
;
1956 last_orb_dma
= scsi_id
->last_orb_dma
;
1959 * last_orb == NULL means: We know that the target's fetch agent
1960 * is not active right now.
1962 addr
+= SBP2_ORB_POINTER_OFFSET
;
1963 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1964 data
[1] = command
->command_orb_dma
;
1965 sbp2util_cpu_to_be32_buffer(data
, 8);
1969 * last_orb != NULL means: We know that the target's fetch agent
1970 * is (very probably) not dead or in reset state right now.
1971 * We have an ORB already sent that we can append a new one to.
1972 * The target's fetch agent may or may not have read this
1975 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, last_orb_dma
,
1976 sizeof(struct sbp2_command_orb
),
1978 last_orb
->next_ORB_lo
= cpu_to_be32(command
->command_orb_dma
);
1980 /* Tells hardware that this pointer is valid */
1981 last_orb
->next_ORB_hi
= 0;
1982 pci_dma_sync_single_for_device(hi
->host
->pdev
, last_orb_dma
,
1983 sizeof(struct sbp2_command_orb
),
1985 addr
+= SBP2_DOORBELL_OFFSET
;
1989 scsi_id
->last_orb
= command_orb
;
1990 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1991 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
1993 SBP2_ORB_DEBUG("write to %s register, command orb %p",
1994 last_orb
? "DOORBELL" : "ORB_POINTER", command_orb
);
1995 if (sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, data
, length
))
1996 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1997 /* We rely on SCSI EH to deal with _node_write_ failures. */
2001 * This function is called in order to begin a regular SBP-2 command.
2003 static int sbp2_send_command(struct scsi_id_instance_data
*scsi_id
,
2004 struct scsi_cmnd
*SCpnt
,
2005 void (*done
)(struct scsi_cmnd
*))
2007 unchar
*cmd
= (unchar
*) SCpnt
->cmnd
;
2008 unsigned int request_bufflen
= SCpnt
->request_bufflen
;
2009 struct sbp2_command_info
*command
;
2012 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen
);
2013 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt
->use_sg
);
2016 * Allocate a command orb and s/g structure
2018 command
= sbp2util_allocate_command_orb(scsi_id
, SCpnt
, done
);
2024 * Now actually fill in the comamnd orb and sbp2 s/g list
2026 sbp2_create_command_orb(scsi_id
, command
, cmd
, SCpnt
->use_sg
,
2027 request_bufflen
, SCpnt
->request_buffer
,
2028 SCpnt
->sc_data_direction
);
2030 sbp2util_packet_dump(&command
->command_orb
, sizeof(struct sbp2_command_orb
),
2031 "sbp2 command orb", command
->command_orb_dma
);
2034 * Link up the orb, and ring the doorbell if needed
2036 sbp2_link_orb_command(scsi_id
, command
);
2042 * Translates SBP-2 status into SCSI sense data for check conditions
2044 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
, unchar
*sense_data
)
2049 * Ok, it's pretty ugly... ;-)
2051 sense_data
[0] = 0x70;
2052 sense_data
[1] = 0x0;
2053 sense_data
[2] = sbp2_status
[9];
2054 sense_data
[3] = sbp2_status
[12];
2055 sense_data
[4] = sbp2_status
[13];
2056 sense_data
[5] = sbp2_status
[14];
2057 sense_data
[6] = sbp2_status
[15];
2059 sense_data
[8] = sbp2_status
[16];
2060 sense_data
[9] = sbp2_status
[17];
2061 sense_data
[10] = sbp2_status
[18];
2062 sense_data
[11] = sbp2_status
[19];
2063 sense_data
[12] = sbp2_status
[10];
2064 sense_data
[13] = sbp2_status
[11];
2065 sense_data
[14] = sbp2_status
[20];
2066 sense_data
[15] = sbp2_status
[21];
2068 return sbp2_status
[8] & 0x3f; /* return scsi status */
2072 * This function deals with status writes from the SBP-2 device
2074 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
,
2075 int destid
, quadlet_t
*data
, u64 addr
,
2076 size_t length
, u16 fl
)
2078 struct sbp2scsi_host_info
*hi
;
2079 struct scsi_id_instance_data
*scsi_id
= NULL
, *scsi_id_tmp
;
2080 struct scsi_cmnd
*SCpnt
= NULL
;
2081 struct sbp2_status_block
*sb
;
2082 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
2083 struct sbp2_command_info
*command
;
2084 unsigned long flags
;
2088 sbp2util_packet_dump(data
, length
, "sbp2 status write by device", (u32
)addr
);
2090 if (unlikely(length
< 8 || length
> sizeof(struct sbp2_status_block
))) {
2091 SBP2_ERR("Wrong size of status block");
2092 return RCODE_ADDRESS_ERROR
;
2094 if (unlikely(!host
)) {
2095 SBP2_ERR("host is NULL - this is bad!");
2096 return RCODE_ADDRESS_ERROR
;
2098 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
2099 if (unlikely(!hi
)) {
2100 SBP2_ERR("host info is NULL - this is bad!");
2101 return RCODE_ADDRESS_ERROR
;
2104 * Find our scsi_id structure by looking at the status fifo address
2105 * written to by the sbp2 device.
2107 list_for_each_entry(scsi_id_tmp
, &hi
->scsi_ids
, scsi_list
) {
2108 if (scsi_id_tmp
->ne
->nodeid
== nodeid
&&
2109 scsi_id_tmp
->status_fifo_addr
== addr
) {
2110 scsi_id
= scsi_id_tmp
;
2114 if (unlikely(!scsi_id
)) {
2115 SBP2_ERR("scsi_id is NULL - device is gone?");
2116 return RCODE_ADDRESS_ERROR
;
2120 * Put response into scsi_id status fifo buffer. The first two bytes
2121 * come in big endian bit order. Often the target writes only a
2122 * truncated status block, minimally the first two quadlets. The rest
2123 * is implied to be zeros.
2125 sb
= &scsi_id
->status_block
;
2126 memset(sb
->command_set_dependent
, 0, sizeof(sb
->command_set_dependent
));
2127 memcpy(sb
, data
, length
);
2128 sbp2util_be32_to_cpu_buffer(sb
, 8);
2131 * Ignore unsolicited status. Handle command ORB status.
2133 if (unlikely(STATUS_GET_SRC(sb
->ORB_offset_hi_misc
) == 2))
2136 command
= sbp2util_find_command_for_orb(scsi_id
,
2139 SBP2_DEBUG("Found status for command ORB");
2140 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2141 sizeof(struct sbp2_command_orb
),
2143 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2144 sizeof(command
->scatter_gather_element
),
2145 PCI_DMA_BIDIRECTIONAL
);
2147 SBP2_ORB_DEBUG("matched command orb %p", &command
->command_orb
);
2148 outstanding_orb_decr
;
2151 * Matched status with command, now grab scsi command pointers
2155 * FIXME: If the src field in the status is 1, the ORB DMA must
2156 * not be reused until status for a subsequent ORB is received.
2158 SCpnt
= command
->Current_SCpnt
;
2159 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2160 sbp2util_mark_command_completed(scsi_id
, command
);
2161 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2164 if (STATUS_TEST_RS(sb
->ORB_offset_hi_misc
))
2166 SBP2_SCSI_STATUS_COMMAND_TERMINATED
;
2168 * See if the target stored any scsi status information.
2170 if (STATUS_GET_LEN(sb
->ORB_offset_hi_misc
) > 1) {
2171 SBP2_DEBUG("CHECK CONDITION");
2172 scsi_status
= sbp2_status_to_sense_data(
2173 (unchar
*)sb
, SCpnt
->sense_buffer
);
2177 * Check to see if the dead bit is set. If so, we'll
2178 * have to initiate a fetch agent reset.
2180 if (STATUS_TEST_D(sb
->ORB_offset_hi_misc
)) {
2181 SBP2_DEBUG("Dead bit set - "
2182 "initiating fetch agent reset");
2183 sbp2_agent_reset(scsi_id
, 0);
2186 SBP2_ORB_DEBUG("completing command orb %p", &command
->command_orb
);
2190 * Check here to see if there are no commands in-use. If there
2191 * are none, we know that the fetch agent left the active state
2192 * _and_ that we did not reactivate it yet. Therefore clear
2193 * last_orb so that next time we write directly to the
2194 * ORB_POINTER register. That way the fetch agent does not need
2195 * to refetch the next_ORB.
2197 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2198 if (list_empty(&scsi_id
->sbp2_command_orb_inuse
))
2199 scsi_id
->last_orb
= NULL
;
2200 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2204 * It's probably a login/logout/reconnect status.
2206 if ((sb
->ORB_offset_lo
== scsi_id
->reconnect_orb_dma
) ||
2207 (sb
->ORB_offset_lo
== scsi_id
->login_orb_dma
) ||
2208 (sb
->ORB_offset_lo
== scsi_id
->query_logins_orb_dma
) ||
2209 (sb
->ORB_offset_lo
== scsi_id
->logout_orb_dma
)) {
2210 scsi_id
->access_complete
= 1;
2211 wake_up_interruptible(&access_wq
);
2216 SBP2_DEBUG("Completing SCSI command");
2217 sbp2scsi_complete_command(scsi_id
, scsi_status
, SCpnt
,
2218 command
->Current_done
);
2219 SBP2_ORB_DEBUG("command orb completed");
2222 return RCODE_COMPLETE
;
2225 /**************************************
2226 * SCSI interface related section
2227 **************************************/
2230 * This routine is the main request entry routine for doing I/O. It is
2231 * called from the scsi stack directly.
2233 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
2234 void (*done
)(struct scsi_cmnd
*))
2236 struct scsi_id_instance_data
*scsi_id
=
2237 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2238 struct sbp2scsi_host_info
*hi
;
2239 int result
= DID_NO_CONNECT
<< 16;
2242 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2243 scsi_print_command(SCpnt
);
2246 if (!sbp2util_node_is_available(scsi_id
))
2252 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2257 * Until we handle multiple luns, just return selection time-out
2258 * to any IO directed at non-zero LUNs
2260 if (SCpnt
->device
->lun
)
2264 * Check for request sense command, and handle it here
2265 * (autorequest sense)
2267 if (SCpnt
->cmnd
[0] == REQUEST_SENSE
) {
2268 SBP2_DEBUG("REQUEST_SENSE");
2269 memcpy(SCpnt
->request_buffer
, SCpnt
->sense_buffer
, SCpnt
->request_bufflen
);
2270 memset(SCpnt
->sense_buffer
, 0, sizeof(SCpnt
->sense_buffer
));
2271 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_GOOD
, SCpnt
, done
);
2276 * Check to see if we are in the middle of a bus reset.
2278 if (!hpsb_node_entry_valid(scsi_id
->ne
)) {
2279 SBP2_ERR("Bus reset in progress - rejecting command");
2280 result
= DID_BUS_BUSY
<< 16;
2285 * Bidirectional commands are not yet implemented,
2286 * and unknown transfer direction not handled.
2288 if (SCpnt
->sc_data_direction
== DMA_BIDIRECTIONAL
) {
2289 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2290 result
= DID_ERROR
<< 16;
2295 * Try and send our SCSI command
2297 if (sbp2_send_command(scsi_id
, SCpnt
, done
)) {
2298 SBP2_ERR("Error sending SCSI command");
2299 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
2305 SCpnt
->result
= result
;
2311 * This function is called in order to complete all outstanding SBP-2
2312 * commands (in case of resets, etc.).
2314 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
2317 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2318 struct list_head
*lh
;
2319 struct sbp2_command_info
*command
;
2320 unsigned long flags
;
2324 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2325 while (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2326 SBP2_DEBUG("Found pending command to complete");
2327 lh
= scsi_id
->sbp2_command_orb_inuse
.next
;
2328 command
= list_entry(lh
, struct sbp2_command_info
, list
);
2329 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2330 sizeof(struct sbp2_command_orb
),
2332 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2333 sizeof(command
->scatter_gather_element
),
2334 PCI_DMA_BIDIRECTIONAL
);
2335 sbp2util_mark_command_completed(scsi_id
, command
);
2336 if (command
->Current_SCpnt
) {
2337 command
->Current_SCpnt
->result
= status
<< 16;
2338 command
->Current_done(command
->Current_SCpnt
);
2341 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2347 * This function is called in order to complete a regular SBP-2 command.
2349 * This can be called in interrupt context.
2351 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
2352 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
2353 void (*done
)(struct scsi_cmnd
*))
2361 SBP2_ERR("SCpnt is NULL");
2366 * If a bus reset is in progress and there was an error, don't
2367 * complete the command, just let it get retried at the end of the
2370 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2371 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2372 SBP2_ERR("Bus reset in progress - retry command later");
2377 * Switch on scsi status
2379 switch (scsi_status
) {
2380 case SBP2_SCSI_STATUS_GOOD
:
2381 SCpnt
->result
= DID_OK
<< 16;
2384 case SBP2_SCSI_STATUS_BUSY
:
2385 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2386 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2389 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
2390 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2391 SCpnt
->result
= CHECK_CONDITION
<< 1 | DID_OK
<< 16;
2392 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2393 scsi_print_command(SCpnt
);
2394 scsi_print_sense(SBP2_DEVICE_NAME
, SCpnt
);
2398 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
2399 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2400 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2401 scsi_print_command(SCpnt
);
2404 case SBP2_SCSI_STATUS_CONDITION_MET
:
2405 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
2406 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
2407 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
2408 SCpnt
->result
= DID_ERROR
<< 16;
2409 scsi_print_command(SCpnt
);
2413 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
2414 SCpnt
->result
= DID_ERROR
<< 16;
2418 * If a bus reset is in progress and there was an error, complete
2419 * the command as busy so that it will get retried.
2421 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2422 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2423 SBP2_ERR("Completing command with busy (bus reset)");
2424 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2428 * If a unit attention occurs, return busy status so it gets
2429 * retried... it could have happened because of a 1394 bus reset
2431 * XXX DID_BUS_BUSY is actually a bad idea because it will defy
2432 * the scsi layer's retry logic.
2435 if ((scsi_status
== SBP2_SCSI_STATUS_CHECK_CONDITION
) &&
2436 (SCpnt
->sense_buffer
[2] == UNIT_ATTENTION
)) {
2437 SBP2_DEBUG("UNIT ATTENTION - return busy");
2438 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2443 * Tell scsi stack that we're done with this command
2448 static int sbp2scsi_slave_alloc(struct scsi_device
*sdev
)
2450 struct scsi_id_instance_data
*scsi_id
=
2451 (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0];
2453 scsi_id
->sdev
= sdev
;
2455 if (scsi_id
->workarounds
& SBP2_WORKAROUND_INQUIRY_36
)
2456 sdev
->inquiry_len
= 36;
2460 static int sbp2scsi_slave_configure(struct scsi_device
*sdev
)
2462 struct scsi_id_instance_data
*scsi_id
=
2463 (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0];
2465 blk_queue_dma_alignment(sdev
->request_queue
, (512 - 1));
2466 sdev
->use_10_for_rw
= 1;
2467 sdev
->use_10_for_ms
= 1;
2469 if (sdev
->type
== TYPE_DISK
&&
2470 scsi_id
->workarounds
& SBP2_WORKAROUND_MODE_SENSE_8
)
2471 sdev
->skip_ms_page_8
= 1;
2472 if (scsi_id
->workarounds
& SBP2_WORKAROUND_FIX_CAPACITY
)
2473 sdev
->fix_capacity
= 1;
2474 if (scsi_id
->ne
->guid_vendor_id
== 0x0010b9 && /* Maxtor's OUI */
2475 (sdev
->type
== TYPE_DISK
|| sdev
->type
== TYPE_RBC
))
2476 sdev
->allow_restart
= 1;
2480 static void sbp2scsi_slave_destroy(struct scsi_device
*sdev
)
2482 ((struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0])->sdev
= NULL
;
2487 * Called by scsi stack when something has really gone wrong. Usually
2488 * called when a command has timed-out for some reason.
2490 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2492 struct scsi_id_instance_data
*scsi_id
=
2493 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2494 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2495 struct sbp2_command_info
*command
;
2496 unsigned long flags
;
2498 SBP2_ERR("aborting sbp2 command");
2499 scsi_print_command(SCpnt
);
2501 if (sbp2util_node_is_available(scsi_id
)) {
2504 * Right now, just return any matching command structures
2507 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2508 command
= sbp2util_find_command_for_SCpnt(scsi_id
, SCpnt
);
2510 SBP2_DEBUG("Found command to abort");
2511 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2512 command
->command_orb_dma
,
2513 sizeof(struct sbp2_command_orb
),
2515 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2517 sizeof(command
->scatter_gather_element
),
2518 PCI_DMA_BIDIRECTIONAL
);
2519 sbp2util_mark_command_completed(scsi_id
, command
);
2520 if (command
->Current_SCpnt
) {
2521 command
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2522 command
->Current_done(command
->Current_SCpnt
);
2525 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2528 * Initiate a fetch agent reset.
2530 sbp2_agent_reset(scsi_id
, 0);
2531 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
2538 * Called by scsi stack when something has really gone wrong.
2540 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2542 struct scsi_id_instance_data
*scsi_id
=
2543 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2545 SBP2_ERR("reset requested");
2547 if (sbp2util_node_is_available(scsi_id
)) {
2548 SBP2_ERR("Generating sbp2 fetch agent reset");
2549 sbp2_agent_reset(scsi_id
, 0);
2555 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
,
2556 struct device_attribute
*attr
,
2559 struct scsi_device
*sdev
;
2560 struct scsi_id_instance_data
*scsi_id
;
2563 if (!(sdev
= to_scsi_device(dev
)))
2566 if (!(scsi_id
= (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0]))
2569 lun
= ORB_SET_LUN(scsi_id
->sbp2_lun
);
2571 return sprintf(buf
, "%016Lx:%d:%d\n", (unsigned long long)scsi_id
->ne
->guid
,
2572 scsi_id
->ud
->id
, lun
);
2574 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
2576 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
2577 &dev_attr_ieee1394_id
,
2581 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2582 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2583 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2584 MODULE_LICENSE("GPL");
2586 /* SCSI host template */
2587 static struct scsi_host_template scsi_driver_template
= {
2588 .module
= THIS_MODULE
,
2589 .name
= "SBP-2 IEEE-1394",
2590 .proc_name
= SBP2_DEVICE_NAME
,
2591 .queuecommand
= sbp2scsi_queuecommand
,
2592 .eh_abort_handler
= sbp2scsi_abort
,
2593 .eh_device_reset_handler
= sbp2scsi_reset
,
2594 .slave_alloc
= sbp2scsi_slave_alloc
,
2595 .slave_configure
= sbp2scsi_slave_configure
,
2596 .slave_destroy
= sbp2scsi_slave_destroy
,
2598 .sg_tablesize
= SG_ALL
,
2599 .use_clustering
= ENABLE_CLUSTERING
,
2600 .cmd_per_lun
= SBP2_MAX_CMDS
,
2601 .can_queue
= SBP2_MAX_CMDS
,
2603 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
2606 static int sbp2_module_init(void)
2612 /* Module load debug option to force one command at a time (serializing I/O) */
2614 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2615 SBP2_INFO("Try serialize_io=0 for better performance");
2616 scsi_driver_template
.can_queue
= 1;
2617 scsi_driver_template
.cmd_per_lun
= 1;
2620 if (sbp2_default_workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
&&
2621 (max_sectors
* 512) > (128 * 1024))
2622 max_sectors
= 128 * 1024 / 512;
2623 scsi_driver_template
.max_sectors
= max_sectors
;
2625 /* Register our high level driver with 1394 stack */
2626 hpsb_register_highlevel(&sbp2_highlevel
);
2628 ret
= hpsb_register_protocol(&sbp2_driver
);
2630 SBP2_ERR("Failed to register protocol");
2631 hpsb_unregister_highlevel(&sbp2_highlevel
);
2638 static void __exit
sbp2_module_exit(void)
2642 hpsb_unregister_protocol(&sbp2_driver
);
2644 hpsb_unregister_highlevel(&sbp2_highlevel
);
2647 module_init(sbp2_module_init
);
2648 module_exit(sbp2_module_exit
);