2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
32 * You may access any attached SBP-2 (usually storage devices) as regular
33 * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
35 * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
36 * specification and for where to purchase the official standard.
39 * - look into possible improvements of the SCSI error handlers
40 * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
41 * - handle Logical_Unit_Number.ordered
42 * - handle src == 1 in status blocks
43 * - reimplement the DMA mapping in absence of physical DMA so that
44 * bus_to_virt is no longer required
45 * - debug the handling of absent physical DMA
46 * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
47 * (this is easy but depends on the previous two TODO items)
48 * - make the parameter serialize_io configurable per device
49 * - move all requests to fetch agent registers into non-atomic context,
50 * replace all usages of sbp2util_node_write_no_wait by true transactions
51 * Grep for inline FIXME comments below.
54 #include <linux/blkdev.h>
55 #include <linux/compiler.h>
56 #include <linux/delay.h>
57 #include <linux/device.h>
58 #include <linux/dma-mapping.h>
59 #include <linux/gfp.h>
60 #include <linux/init.h>
61 #include <linux/kernel.h>
62 #include <linux/list.h>
64 #include <linux/module.h>
65 #include <linux/moduleparam.h>
66 #include <linux/sched.h>
67 #include <linux/slab.h>
68 #include <linux/spinlock.h>
69 #include <linux/stat.h>
70 #include <linux/string.h>
71 #include <linux/stringify.h>
72 #include <linux/types.h>
73 #include <linux/wait.h>
74 #include <linux/workqueue.h>
75 #include <linux/scatterlist.h>
77 #include <asm/byteorder.h>
78 #include <asm/errno.h>
79 #include <asm/param.h>
80 #include <asm/system.h>
81 #include <asm/types.h>
83 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
84 #include <asm/io.h> /* for bus_to_virt */
87 #include <scsi/scsi.h>
88 #include <scsi/scsi_cmnd.h>
89 #include <scsi/scsi_dbg.h>
90 #include <scsi/scsi_device.h>
91 #include <scsi/scsi_host.h>
94 #include "highlevel.h"
97 #include "ieee1394_core.h"
98 #include "ieee1394_hotplug.h"
99 #include "ieee1394_transactions.h"
100 #include "ieee1394_types.h"
105 * Module load parameter definitions
109 * Change max_speed on module load if you have a bad IEEE-1394
110 * controller that has trouble running 2KB packets at 400mb.
112 * NOTE: On certain OHCI parts I have seen short packets on async transmit
113 * (probably due to PCI latency/throughput issues with the part). You can
114 * bump down the speed if you are running into problems.
116 static int sbp2_max_speed
= IEEE1394_SPEED_MAX
;
117 module_param_named(max_speed
, sbp2_max_speed
, int, 0644);
118 MODULE_PARM_DESC(max_speed
, "Force max speed "
119 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
122 * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
123 * This is and always has been buggy in multiple subtle ways. See above TODOs.
125 static int sbp2_serialize_io
= 1;
126 module_param_named(serialize_io
, sbp2_serialize_io
, bool, 0444);
127 MODULE_PARM_DESC(serialize_io
, "Serialize requests coming from SCSI drivers "
128 "(default = Y, faster but buggy = N)");
131 * Adjust max_sectors if you'd like to influence how many sectors each SCSI
132 * command can transfer at most. Please note that some older SBP-2 bridge
133 * chips are broken for transfers greater or equal to 128KB, therefore
134 * max_sectors used to be a safe 255 sectors for many years. We now have a
135 * default of 0 here which means that we let the SCSI stack choose a limit.
137 * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds
138 * module parameter or in the sbp2_workarounds_table[], will override the
139 * value of max_sectors. We should use sbp2_workarounds_table[] to cover any
140 * bridge chip which becomes known to need the 255 sectors limit.
142 static int sbp2_max_sectors
;
143 module_param_named(max_sectors
, sbp2_max_sectors
, int, 0444);
144 MODULE_PARM_DESC(max_sectors
, "Change max sectors per I/O supported "
145 "(default = 0 = use SCSI stack's default)");
148 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
149 * do an exclusive login, as it's generally unsafe to have two hosts
150 * talking to a single sbp2 device at the same time (filesystem coherency,
151 * etc.). If you're running an sbp2 device that supports multiple logins,
152 * and you're either running read-only filesystems or some sort of special
153 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
154 * File System, or Lustre, then set exclusive_login to zero.
156 * So far only bridges from Oxford Semiconductor are known to support
157 * concurrent logins. Depending on firmware, four or two concurrent logins
158 * are possible on OXFW911 and newer Oxsemi bridges.
160 static int sbp2_exclusive_login
= 1;
161 module_param_named(exclusive_login
, sbp2_exclusive_login
, bool, 0644);
162 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device "
163 "(default = Y, use N for concurrent initiators)");
166 * If any of the following workarounds is required for your device to work,
167 * please submit the kernel messages logged by sbp2 to the linux1394-devel
170 * - 128kB max transfer
171 * Limit transfer size. Necessary for some old bridges.
174 * When scsi_mod probes the device, let the inquiry command look like that
178 * Suppress sending of mode_sense for mode page 8 if the device pretends to
179 * support the SCSI Primary Block commands instead of Reduced Block Commands.
182 * Tell sd_mod to correct the last sector number reported by read_capacity.
183 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
184 * Don't use this with devices which don't have this bug.
187 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
190 * Set the power condition field in the START STOP UNIT commands sent by
191 * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
192 * Some disks need this to spin down or to resume properly.
194 * - override internal blacklist
195 * Instead of adding to the built-in blacklist, use only the workarounds
196 * specified in the module load parameter.
197 * Useful if a blacklist entry interfered with a non-broken device.
199 static int sbp2_default_workarounds
;
200 module_param_named(workarounds
, sbp2_default_workarounds
, int, 0644);
201 MODULE_PARM_DESC(workarounds
, "Work around device bugs (default = 0"
202 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS
)
203 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36
)
204 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8
)
205 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY
)
206 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY
)
207 ", set power condition in start stop unit = "
208 __stringify(SBP2_WORKAROUND_POWER_CONDITION
)
209 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE
)
210 ", or a combination)");
213 * This influences the format of the sysfs attribute
214 * /sys/bus/scsi/devices/.../ieee1394_id.
216 * The default format is like in older kernels: %016Lx:%d:%d
217 * It contains the target's EUI-64, a number given to the logical unit by
218 * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
220 * The long format is: %016Lx:%06x:%04x
221 * It contains the target's EUI-64, the unit directory's directory_ID as per
222 * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
223 * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
224 * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
225 * independent of the implementation of the ieee1394 nodemgr, the longer format
226 * is recommended for future use.
228 static int sbp2_long_sysfs_ieee1394_id
;
229 module_param_named(long_ieee1394_id
, sbp2_long_sysfs_ieee1394_id
, bool, 0644);
230 MODULE_PARM_DESC(long_ieee1394_id
, "8+3+2 bytes format of ieee1394_id in sysfs "
231 "(default = backwards-compatible = N, SAM-conforming = Y)");
234 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
235 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
240 static void sbp2scsi_complete_all_commands(struct sbp2_lu
*, u32
);
241 static void sbp2scsi_complete_command(struct sbp2_lu
*, u32
, struct scsi_cmnd
*,
242 void (*)(struct scsi_cmnd
*));
243 static struct sbp2_lu
*sbp2_alloc_device(struct unit_directory
*);
244 static int sbp2_start_device(struct sbp2_lu
*);
245 static void sbp2_remove_device(struct sbp2_lu
*);
246 static int sbp2_login_device(struct sbp2_lu
*);
247 static int sbp2_reconnect_device(struct sbp2_lu
*);
248 static int sbp2_logout_device(struct sbp2_lu
*);
249 static void sbp2_host_reset(struct hpsb_host
*);
250 static int sbp2_handle_status_write(struct hpsb_host
*, int, int, quadlet_t
*,
252 static int sbp2_agent_reset(struct sbp2_lu
*, int);
253 static void sbp2_parse_unit_directory(struct sbp2_lu
*,
254 struct unit_directory
*);
255 static int sbp2_set_busy_timeout(struct sbp2_lu
*);
256 static int sbp2_max_speed_and_size(struct sbp2_lu
*);
259 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
261 static DEFINE_RWLOCK(sbp2_hi_logical_units_lock
);
263 static struct hpsb_highlevel sbp2_highlevel
= {
264 .name
= SBP2_DEVICE_NAME
,
265 .host_reset
= sbp2_host_reset
,
268 static struct hpsb_address_ops sbp2_ops
= {
269 .write
= sbp2_handle_status_write
272 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
273 static int sbp2_handle_physdma_write(struct hpsb_host
*, int, int, quadlet_t
*,
275 static int sbp2_handle_physdma_read(struct hpsb_host
*, int, quadlet_t
*, u64
,
278 static struct hpsb_address_ops sbp2_physdma_ops
= {
279 .read
= sbp2_handle_physdma_read
,
280 .write
= sbp2_handle_physdma_write
,
286 * Interface to driver core and IEEE 1394 core
288 static struct ieee1394_device_id sbp2_id_table
[] = {
290 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
| IEEE1394_MATCH_VERSION
,
291 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
292 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff},
295 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
297 static int sbp2_probe(struct device
*);
298 static int sbp2_remove(struct device
*);
299 static int sbp2_update(struct unit_directory
*);
301 static struct hpsb_protocol_driver sbp2_driver
= {
302 .name
= SBP2_DEVICE_NAME
,
303 .id_table
= sbp2_id_table
,
304 .update
= sbp2_update
,
307 .remove
= sbp2_remove
,
313 * Interface to SCSI core
315 static int sbp2scsi_queuecommand(struct scsi_cmnd
*,
316 void (*)(struct scsi_cmnd
*));
317 static int sbp2scsi_abort(struct scsi_cmnd
*);
318 static int sbp2scsi_reset(struct scsi_cmnd
*);
319 static int sbp2scsi_slave_alloc(struct scsi_device
*);
320 static int sbp2scsi_slave_configure(struct scsi_device
*);
321 static void sbp2scsi_slave_destroy(struct scsi_device
*);
322 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*,
323 struct device_attribute
*, char *);
325 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
327 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
328 &dev_attr_ieee1394_id
,
332 static struct scsi_host_template sbp2_shost_template
= {
333 .module
= THIS_MODULE
,
334 .name
= "SBP-2 IEEE-1394",
335 .proc_name
= SBP2_DEVICE_NAME
,
336 .queuecommand
= sbp2scsi_queuecommand
,
337 .eh_abort_handler
= sbp2scsi_abort
,
338 .eh_device_reset_handler
= sbp2scsi_reset
,
339 .slave_alloc
= sbp2scsi_slave_alloc
,
340 .slave_configure
= sbp2scsi_slave_configure
,
341 .slave_destroy
= sbp2scsi_slave_destroy
,
343 .sg_tablesize
= SG_ALL
,
344 .use_clustering
= ENABLE_CLUSTERING
,
345 .cmd_per_lun
= SBP2_MAX_CMDS
,
346 .can_queue
= SBP2_MAX_CMDS
,
347 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
350 /* for match-all entries in sbp2_workarounds_table */
351 #define SBP2_ROM_VALUE_WILDCARD 0x1000000
354 * List of devices with known bugs.
356 * The firmware_revision field, masked with 0xffff00, is the best indicator
357 * for the type of bridge chip of a device. It yields a few false positives
358 * but this did not break correctly behaving devices so far.
360 static const struct {
361 u32 firmware_revision
;
363 unsigned workarounds
;
364 } sbp2_workarounds_table
[] = {
365 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
366 .firmware_revision
= 0x002800,
367 .model_id
= 0x001010,
368 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
|
369 SBP2_WORKAROUND_MODE_SENSE_8
|
370 SBP2_WORKAROUND_POWER_CONDITION
,
372 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
373 .firmware_revision
= 0x002800,
374 .model_id
= 0x000000,
375 .workarounds
= SBP2_WORKAROUND_DELAY_INQUIRY
|
376 SBP2_WORKAROUND_POWER_CONDITION
,
378 /* Initio bridges, actually only needed for some older ones */ {
379 .firmware_revision
= 0x000200,
380 .model_id
= SBP2_ROM_VALUE_WILDCARD
,
381 .workarounds
= SBP2_WORKAROUND_INQUIRY_36
,
383 /* PL-3507 bridge with Prolific firmware */ {
384 .firmware_revision
= 0x012800,
385 .model_id
= SBP2_ROM_VALUE_WILDCARD
,
386 .workarounds
= SBP2_WORKAROUND_POWER_CONDITION
,
388 /* Symbios bridge */ {
389 .firmware_revision
= 0xa0b800,
390 .model_id
= SBP2_ROM_VALUE_WILDCARD
,
391 .workarounds
= SBP2_WORKAROUND_128K_MAX_TRANS
,
393 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
394 .firmware_revision
= 0x002600,
395 .model_id
= SBP2_ROM_VALUE_WILDCARD
,
396 .workarounds
= SBP2_WORKAROUND_128K_MAX_TRANS
,
399 * iPod 2nd generation: needs 128k max transfer size workaround
400 * iPod 3rd generation: needs fix capacity workaround
403 .firmware_revision
= 0x0a2700,
404 .model_id
= 0x000000,
405 .workarounds
= SBP2_WORKAROUND_128K_MAX_TRANS
|
406 SBP2_WORKAROUND_FIX_CAPACITY
,
408 /* iPod 4th generation */ {
409 .firmware_revision
= 0x0a2700,
410 .model_id
= 0x000021,
411 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
414 .firmware_revision
= 0x0a2700,
415 .model_id
= 0x000022,
416 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
419 .firmware_revision
= 0x0a2700,
420 .model_id
= 0x000023,
421 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
424 .firmware_revision
= 0x0a2700,
425 .model_id
= 0x00007e,
426 .workarounds
= SBP2_WORKAROUND_FIX_CAPACITY
,
430 /**************************************
431 * General utility functions
432 **************************************/
436 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
438 static inline void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
442 for (length
= (length
>> 2); length
--; )
443 temp
[length
] = be32_to_cpu(temp
[length
]);
447 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
449 static inline void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
453 for (length
= (length
>> 2); length
--; )
454 temp
[length
] = cpu_to_be32(temp
[length
]);
456 #else /* BIG_ENDIAN */
457 /* Why waste the cpu cycles? */
458 #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
459 #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
462 static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq
);
465 * Waits for completion of an SBP-2 access request.
466 * Returns nonzero if timed out or prematurely interrupted.
468 static int sbp2util_access_timeout(struct sbp2_lu
*lu
, int timeout
)
472 leftover
= wait_event_interruptible_timeout(
473 sbp2_access_wq
, lu
->access_complete
, timeout
);
474 lu
->access_complete
= 0;
475 return leftover
<= 0;
478 static void sbp2_free_packet(void *packet
)
480 hpsb_free_tlabel(packet
);
481 hpsb_free_packet(packet
);
485 * This is much like hpsb_node_write(), except it ignores the response
486 * subaction and returns immediately. Can be used from atomic context.
488 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
489 quadlet_t
*buf
, size_t len
)
491 struct hpsb_packet
*packet
;
493 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
, addr
, buf
, len
);
497 hpsb_set_packet_complete_task(packet
, sbp2_free_packet
, packet
);
498 hpsb_node_fill_packet(ne
, packet
);
499 if (hpsb_send_packet(packet
) < 0) {
500 sbp2_free_packet(packet
);
506 static void sbp2util_notify_fetch_agent(struct sbp2_lu
*lu
, u64 offset
,
507 quadlet_t
*data
, size_t len
)
509 /* There is a small window after a bus reset within which the node
510 * entry's generation is current but the reconnect wasn't completed. */
511 if (unlikely(atomic_read(&lu
->state
) == SBP2LU_STATE_IN_RESET
))
514 if (hpsb_node_write(lu
->ne
, lu
->command_block_agent_addr
+ offset
,
516 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
518 /* Now accept new SCSI commands, unless a bus reset happended during
519 * hpsb_node_write. */
520 if (likely(atomic_read(&lu
->state
) != SBP2LU_STATE_IN_RESET
))
521 scsi_unblock_requests(lu
->shost
);
524 static void sbp2util_write_orb_pointer(struct work_struct
*work
)
526 struct sbp2_lu
*lu
= container_of(work
, struct sbp2_lu
, protocol_work
);
529 data
[0] = ORB_SET_NODE_ID(lu
->hi
->host
->node_id
);
530 data
[1] = lu
->last_orb_dma
;
531 sbp2util_cpu_to_be32_buffer(data
, 8);
532 sbp2util_notify_fetch_agent(lu
, SBP2_ORB_POINTER_OFFSET
, data
, 8);
535 static void sbp2util_write_doorbell(struct work_struct
*work
)
537 struct sbp2_lu
*lu
= container_of(work
, struct sbp2_lu
, protocol_work
);
539 sbp2util_notify_fetch_agent(lu
, SBP2_DOORBELL_OFFSET
, NULL
, 4);
542 static int sbp2util_create_command_orb_pool(struct sbp2_lu
*lu
)
544 struct sbp2_command_info
*cmd
;
545 struct device
*dmadev
= lu
->hi
->host
->device
.parent
;
546 int i
, orbs
= sbp2_serialize_io
? 2 : SBP2_MAX_CMDS
;
548 for (i
= 0; i
< orbs
; i
++) {
549 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
553 cmd
->command_orb_dma
=
554 dma_map_single(dmadev
, &cmd
->command_orb
,
555 sizeof(struct sbp2_command_orb
),
557 if (dma_mapping_error(dmadev
, cmd
->command_orb_dma
))
561 dma_map_single(dmadev
, &cmd
->scatter_gather_element
,
562 sizeof(cmd
->scatter_gather_element
),
564 if (dma_mapping_error(dmadev
, cmd
->sge_dma
))
567 INIT_LIST_HEAD(&cmd
->list
);
568 list_add_tail(&cmd
->list
, &lu
->cmd_orb_completed
);
573 dma_unmap_single(dmadev
, cmd
->command_orb_dma
,
574 sizeof(struct sbp2_command_orb
), DMA_TO_DEVICE
);
581 static void sbp2util_remove_command_orb_pool(struct sbp2_lu
*lu
,
582 struct hpsb_host
*host
)
584 struct list_head
*lh
, *next
;
585 struct sbp2_command_info
*cmd
;
588 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
589 if (!list_empty(&lu
->cmd_orb_completed
))
590 list_for_each_safe(lh
, next
, &lu
->cmd_orb_completed
) {
591 cmd
= list_entry(lh
, struct sbp2_command_info
, list
);
592 dma_unmap_single(host
->device
.parent
,
593 cmd
->command_orb_dma
,
594 sizeof(struct sbp2_command_orb
),
596 dma_unmap_single(host
->device
.parent
, cmd
->sge_dma
,
597 sizeof(cmd
->scatter_gather_element
),
601 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
606 * Finds the sbp2_command for a given outstanding command ORB.
607 * Only looks at the in-use list.
609 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
610 struct sbp2_lu
*lu
, dma_addr_t orb
)
612 struct sbp2_command_info
*cmd
;
615 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
616 if (!list_empty(&lu
->cmd_orb_inuse
))
617 list_for_each_entry(cmd
, &lu
->cmd_orb_inuse
, list
)
618 if (cmd
->command_orb_dma
== orb
) {
619 spin_unlock_irqrestore(
620 &lu
->cmd_orb_lock
, flags
);
623 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
628 * Finds the sbp2_command for a given outstanding SCpnt.
629 * Only looks at the in-use list.
630 * Must be called with lu->cmd_orb_lock held.
632 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(
633 struct sbp2_lu
*lu
, void *SCpnt
)
635 struct sbp2_command_info
*cmd
;
637 if (!list_empty(&lu
->cmd_orb_inuse
))
638 list_for_each_entry(cmd
, &lu
->cmd_orb_inuse
, list
)
639 if (cmd
->Current_SCpnt
== SCpnt
)
644 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
646 struct scsi_cmnd
*Current_SCpnt
,
647 void (*Current_done
)(struct scsi_cmnd
*))
649 struct list_head
*lh
;
650 struct sbp2_command_info
*cmd
= NULL
;
653 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
654 if (!list_empty(&lu
->cmd_orb_completed
)) {
655 lh
= lu
->cmd_orb_completed
.next
;
657 cmd
= list_entry(lh
, struct sbp2_command_info
, list
);
658 cmd
->Current_done
= Current_done
;
659 cmd
->Current_SCpnt
= Current_SCpnt
;
660 list_add_tail(&cmd
->list
, &lu
->cmd_orb_inuse
);
662 SBP2_ERR("%s: no orbs available", __func__
);
663 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
668 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
669 * Must be called with lu->cmd_orb_lock held.
671 static void sbp2util_mark_command_completed(struct sbp2_lu
*lu
,
672 struct sbp2_command_info
*cmd
)
674 if (scsi_sg_count(cmd
->Current_SCpnt
))
675 dma_unmap_sg(lu
->ud
->ne
->host
->device
.parent
,
676 scsi_sglist(cmd
->Current_SCpnt
),
677 scsi_sg_count(cmd
->Current_SCpnt
),
678 cmd
->Current_SCpnt
->sc_data_direction
);
679 list_move_tail(&cmd
->list
, &lu
->cmd_orb_completed
);
683 * Is lu valid? Is the 1394 node still present?
685 static inline int sbp2util_node_is_available(struct sbp2_lu
*lu
)
687 return lu
&& lu
->ne
&& !lu
->ne
->in_limbo
;
690 /*********************************************
691 * IEEE-1394 core driver stack related section
692 *********************************************/
694 static int sbp2_probe(struct device
*dev
)
696 struct unit_directory
*ud
;
699 ud
= container_of(dev
, struct unit_directory
, device
);
701 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
703 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
706 lu
= sbp2_alloc_device(ud
);
710 sbp2_parse_unit_directory(lu
, ud
);
711 return sbp2_start_device(lu
);
714 static int sbp2_remove(struct device
*dev
)
716 struct unit_directory
*ud
;
718 struct scsi_device
*sdev
;
720 ud
= container_of(dev
, struct unit_directory
, device
);
721 lu
= ud
->device
.driver_data
;
726 /* Get rid of enqueued commands if there is no chance to
728 if (!sbp2util_node_is_available(lu
))
729 sbp2scsi_complete_all_commands(lu
, DID_NO_CONNECT
);
730 /* scsi_remove_device() may trigger shutdown functions of SCSI
731 * highlevel drivers which would deadlock if blocked. */
732 atomic_set(&lu
->state
, SBP2LU_STATE_IN_SHUTDOWN
);
733 scsi_unblock_requests(lu
->shost
);
738 scsi_remove_device(sdev
);
741 sbp2_logout_device(lu
);
742 sbp2_remove_device(lu
);
747 static int sbp2_update(struct unit_directory
*ud
)
749 struct sbp2_lu
*lu
= ud
->device
.driver_data
;
751 if (sbp2_reconnect_device(lu
) != 0) {
753 * Reconnect failed. If another bus reset happened,
754 * let nodemgr proceed and call sbp2_update again later
755 * (or sbp2_remove if this node went away).
757 if (!hpsb_node_entry_valid(lu
->ne
))
760 * Or the target rejected the reconnect because we weren't
761 * fast enough. Try a regular login, but first log out
762 * just in case of any weirdness.
764 sbp2_logout_device(lu
);
766 if (sbp2_login_device(lu
) != 0) {
767 if (!hpsb_node_entry_valid(lu
->ne
))
770 /* Maybe another initiator won the login. */
771 SBP2_ERR("Failed to reconnect to sbp2 device!");
776 sbp2_set_busy_timeout(lu
);
777 sbp2_agent_reset(lu
, 1);
778 sbp2_max_speed_and_size(lu
);
780 /* Complete any pending commands with busy (so they get retried)
781 * and remove them from our queue. */
782 sbp2scsi_complete_all_commands(lu
, DID_BUS_BUSY
);
784 /* Accept new commands unless there was another bus reset in the
786 if (hpsb_node_entry_valid(lu
->ne
)) {
787 atomic_set(&lu
->state
, SBP2LU_STATE_RUNNING
);
788 scsi_unblock_requests(lu
->shost
);
793 static struct sbp2_lu
*sbp2_alloc_device(struct unit_directory
*ud
)
795 struct sbp2_fwhost_info
*hi
;
796 struct Scsi_Host
*shost
= NULL
;
797 struct sbp2_lu
*lu
= NULL
;
800 lu
= kzalloc(sizeof(*lu
), GFP_KERNEL
);
802 SBP2_ERR("failed to create lu");
808 lu
->speed_code
= IEEE1394_SPEED_100
;
809 lu
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
810 lu
->status_fifo_addr
= CSR1212_INVALID_ADDR_SPACE
;
811 INIT_LIST_HEAD(&lu
->cmd_orb_inuse
);
812 INIT_LIST_HEAD(&lu
->cmd_orb_completed
);
813 INIT_LIST_HEAD(&lu
->lu_list
);
814 spin_lock_init(&lu
->cmd_orb_lock
);
815 atomic_set(&lu
->state
, SBP2LU_STATE_RUNNING
);
816 INIT_WORK(&lu
->protocol_work
, NULL
);
818 ud
->device
.driver_data
= lu
;
820 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
822 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
,
825 SBP2_ERR("failed to allocate hostinfo");
828 hi
->host
= ud
->ne
->host
;
829 INIT_LIST_HEAD(&hi
->logical_units
);
831 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
832 /* Handle data movement if physical dma is not
833 * enabled or not supported on host controller */
834 if (!hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
,
836 0x0ULL
, 0xfffffffcULL
)) {
837 SBP2_ERR("failed to register lower 4GB address range");
843 if (dma_get_max_seg_size(hi
->host
->device
.parent
) > SBP2_MAX_SEG_SIZE
)
844 BUG_ON(dma_set_max_seg_size(hi
->host
->device
.parent
,
847 /* Prevent unloading of the 1394 host */
848 if (!try_module_get(hi
->host
->driver
->owner
)) {
849 SBP2_ERR("failed to get a reference on 1394 host driver");
855 write_lock_irqsave(&sbp2_hi_logical_units_lock
, flags
);
856 list_add_tail(&lu
->lu_list
, &hi
->logical_units
);
857 write_unlock_irqrestore(&sbp2_hi_logical_units_lock
, flags
);
859 /* Register the status FIFO address range. We could use the same FIFO
860 * for targets at different nodes. However we need different FIFOs per
861 * target in order to support multi-unit devices.
862 * The FIFO is located out of the local host controller's physical range
863 * but, if possible, within the posted write area. Status writes will
864 * then be performed as unified transactions. This slightly reduces
865 * bandwidth usage, and some Prolific based devices seem to require it.
867 lu
->status_fifo_addr
= hpsb_allocate_and_register_addrspace(
868 &sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
869 sizeof(struct sbp2_status_block
), sizeof(quadlet_t
),
870 ud
->ne
->host
->low_addr_space
, CSR1212_ALL_SPACE_END
);
871 if (lu
->status_fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
872 SBP2_ERR("failed to allocate status FIFO address range");
876 shost
= scsi_host_alloc(&sbp2_shost_template
, sizeof(unsigned long));
878 SBP2_ERR("failed to register scsi host");
882 shost
->hostdata
[0] = (unsigned long)lu
;
884 if (!scsi_add_host(shost
, &ud
->device
)) {
889 SBP2_ERR("failed to add scsi host");
890 scsi_host_put(shost
);
893 sbp2_remove_device(lu
);
897 static void sbp2_host_reset(struct hpsb_host
*host
)
899 struct sbp2_fwhost_info
*hi
;
903 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
907 read_lock_irqsave(&sbp2_hi_logical_units_lock
, flags
);
909 list_for_each_entry(lu
, &hi
->logical_units
, lu_list
)
910 if (atomic_cmpxchg(&lu
->state
,
911 SBP2LU_STATE_RUNNING
, SBP2LU_STATE_IN_RESET
)
912 == SBP2LU_STATE_RUNNING
)
913 scsi_block_requests(lu
->shost
);
915 read_unlock_irqrestore(&sbp2_hi_logical_units_lock
, flags
);
918 static int sbp2_start_device(struct sbp2_lu
*lu
)
920 struct sbp2_fwhost_info
*hi
= lu
->hi
;
923 lu
->login_response
= dma_alloc_coherent(hi
->host
->device
.parent
,
924 sizeof(struct sbp2_login_response
),
925 &lu
->login_response_dma
, GFP_KERNEL
);
926 if (!lu
->login_response
)
929 lu
->query_logins_orb
= dma_alloc_coherent(hi
->host
->device
.parent
,
930 sizeof(struct sbp2_query_logins_orb
),
931 &lu
->query_logins_orb_dma
, GFP_KERNEL
);
932 if (!lu
->query_logins_orb
)
935 lu
->query_logins_response
= dma_alloc_coherent(hi
->host
->device
.parent
,
936 sizeof(struct sbp2_query_logins_response
),
937 &lu
->query_logins_response_dma
, GFP_KERNEL
);
938 if (!lu
->query_logins_response
)
941 lu
->reconnect_orb
= dma_alloc_coherent(hi
->host
->device
.parent
,
942 sizeof(struct sbp2_reconnect_orb
),
943 &lu
->reconnect_orb_dma
, GFP_KERNEL
);
944 if (!lu
->reconnect_orb
)
947 lu
->logout_orb
= dma_alloc_coherent(hi
->host
->device
.parent
,
948 sizeof(struct sbp2_logout_orb
),
949 &lu
->logout_orb_dma
, GFP_KERNEL
);
953 lu
->login_orb
= dma_alloc_coherent(hi
->host
->device
.parent
,
954 sizeof(struct sbp2_login_orb
),
955 &lu
->login_orb_dma
, GFP_KERNEL
);
959 if (sbp2util_create_command_orb_pool(lu
))
962 /* Wait a second before trying to log in. Previously logged in
963 * initiators need a chance to reconnect. */
964 if (msleep_interruptible(1000)) {
965 sbp2_remove_device(lu
);
969 if (sbp2_login_device(lu
)) {
970 sbp2_remove_device(lu
);
974 sbp2_set_busy_timeout(lu
);
975 sbp2_agent_reset(lu
, 1);
976 sbp2_max_speed_and_size(lu
);
978 if (lu
->workarounds
& SBP2_WORKAROUND_DELAY_INQUIRY
)
979 ssleep(SBP2_INQUIRY_DELAY
);
981 error
= scsi_add_device(lu
->shost
, 0, lu
->ud
->id
, 0);
983 SBP2_ERR("scsi_add_device failed");
984 sbp2_logout_device(lu
);
985 sbp2_remove_device(lu
);
992 SBP2_ERR("Could not allocate memory for lu");
993 sbp2_remove_device(lu
);
997 static void sbp2_remove_device(struct sbp2_lu
*lu
)
999 struct sbp2_fwhost_info
*hi
;
1000 unsigned long flags
;
1009 scsi_remove_host(lu
->shost
);
1010 scsi_host_put(lu
->shost
);
1012 flush_scheduled_work();
1013 sbp2util_remove_command_orb_pool(lu
, hi
->host
);
1015 write_lock_irqsave(&sbp2_hi_logical_units_lock
, flags
);
1016 list_del(&lu
->lu_list
);
1017 write_unlock_irqrestore(&sbp2_hi_logical_units_lock
, flags
);
1019 if (lu
->login_response
)
1020 dma_free_coherent(hi
->host
->device
.parent
,
1021 sizeof(struct sbp2_login_response
),
1023 lu
->login_response_dma
);
1025 dma_free_coherent(hi
->host
->device
.parent
,
1026 sizeof(struct sbp2_login_orb
),
1029 if (lu
->reconnect_orb
)
1030 dma_free_coherent(hi
->host
->device
.parent
,
1031 sizeof(struct sbp2_reconnect_orb
),
1033 lu
->reconnect_orb_dma
);
1035 dma_free_coherent(hi
->host
->device
.parent
,
1036 sizeof(struct sbp2_logout_orb
),
1038 lu
->logout_orb_dma
);
1039 if (lu
->query_logins_orb
)
1040 dma_free_coherent(hi
->host
->device
.parent
,
1041 sizeof(struct sbp2_query_logins_orb
),
1042 lu
->query_logins_orb
,
1043 lu
->query_logins_orb_dma
);
1044 if (lu
->query_logins_response
)
1045 dma_free_coherent(hi
->host
->device
.parent
,
1046 sizeof(struct sbp2_query_logins_response
),
1047 lu
->query_logins_response
,
1048 lu
->query_logins_response_dma
);
1050 if (lu
->status_fifo_addr
!= CSR1212_INVALID_ADDR_SPACE
)
1051 hpsb_unregister_addrspace(&sbp2_highlevel
, hi
->host
,
1052 lu
->status_fifo_addr
);
1054 lu
->ud
->device
.driver_data
= NULL
;
1056 module_put(hi
->host
->driver
->owner
);
1061 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1063 * Deal with write requests on adapters which do not support physical DMA or
1064 * have it switched off.
1066 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
,
1067 int destid
, quadlet_t
*data
, u64 addr
,
1068 size_t length
, u16 flags
)
1070 memcpy(bus_to_virt((u32
) addr
), data
, length
);
1071 return RCODE_COMPLETE
;
1075 * Deal with read requests on adapters which do not support physical DMA or
1076 * have it switched off.
1078 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
,
1079 quadlet_t
*data
, u64 addr
, size_t length
,
1082 memcpy(data
, bus_to_virt((u32
) addr
), length
);
1083 return RCODE_COMPLETE
;
1087 /**************************************
1088 * SBP-2 protocol related section
1089 **************************************/
1091 static int sbp2_query_logins(struct sbp2_lu
*lu
)
1093 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1098 lu
->query_logins_orb
->reserved1
= 0x0;
1099 lu
->query_logins_orb
->reserved2
= 0x0;
1101 lu
->query_logins_orb
->query_response_lo
= lu
->query_logins_response_dma
;
1102 lu
->query_logins_orb
->query_response_hi
=
1103 ORB_SET_NODE_ID(hi
->host
->node_id
);
1104 lu
->query_logins_orb
->lun_misc
=
1105 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1106 lu
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1107 lu
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(lu
->lun
);
1109 lu
->query_logins_orb
->reserved_resp_length
=
1110 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1111 sizeof(struct sbp2_query_logins_response
));
1113 lu
->query_logins_orb
->status_fifo_hi
=
1114 ORB_SET_STATUS_FIFO_HI(lu
->status_fifo_addr
, hi
->host
->node_id
);
1115 lu
->query_logins_orb
->status_fifo_lo
=
1116 ORB_SET_STATUS_FIFO_LO(lu
->status_fifo_addr
);
1118 sbp2util_cpu_to_be32_buffer(lu
->query_logins_orb
,
1119 sizeof(struct sbp2_query_logins_orb
));
1121 memset(lu
->query_logins_response
, 0,
1122 sizeof(struct sbp2_query_logins_response
));
1124 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1125 data
[1] = lu
->query_logins_orb_dma
;
1126 sbp2util_cpu_to_be32_buffer(data
, 8);
1128 hpsb_node_write(lu
->ne
, lu
->management_agent_addr
, data
, 8);
1130 if (sbp2util_access_timeout(lu
, 2*HZ
)) {
1131 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1135 if (lu
->status_block
.ORB_offset_lo
!= lu
->query_logins_orb_dma
) {
1136 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1140 if (STATUS_TEST_RDS(lu
->status_block
.ORB_offset_hi_misc
)) {
1141 SBP2_INFO("Error querying logins to SBP-2 device - failed");
1145 sbp2util_cpu_to_be32_buffer(lu
->query_logins_response
,
1146 sizeof(struct sbp2_query_logins_response
));
1148 max_logins
= RESPONSE_GET_MAX_LOGINS(
1149 lu
->query_logins_response
->length_max_logins
);
1150 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins
);
1152 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(
1153 lu
->query_logins_response
->length_max_logins
);
1154 SBP2_INFO("Number of active logins: %d", active_logins
);
1156 if (active_logins
>= max_logins
) {
1163 static int sbp2_login_device(struct sbp2_lu
*lu
)
1165 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1171 if (!sbp2_exclusive_login
&& sbp2_query_logins(lu
)) {
1172 SBP2_INFO("Device does not support any more concurrent logins");
1176 /* assume no password */
1177 lu
->login_orb
->password_hi
= 0;
1178 lu
->login_orb
->password_lo
= 0;
1180 lu
->login_orb
->login_response_lo
= lu
->login_response_dma
;
1181 lu
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1182 lu
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1184 /* one second reconnect time */
1185 lu
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0);
1186 lu
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(sbp2_exclusive_login
);
1187 lu
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1188 lu
->login_orb
->lun_misc
|= ORB_SET_LUN(lu
->lun
);
1190 lu
->login_orb
->passwd_resp_lengths
=
1191 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1193 lu
->login_orb
->status_fifo_hi
=
1194 ORB_SET_STATUS_FIFO_HI(lu
->status_fifo_addr
, hi
->host
->node_id
);
1195 lu
->login_orb
->status_fifo_lo
=
1196 ORB_SET_STATUS_FIFO_LO(lu
->status_fifo_addr
);
1198 sbp2util_cpu_to_be32_buffer(lu
->login_orb
,
1199 sizeof(struct sbp2_login_orb
));
1201 memset(lu
->login_response
, 0, sizeof(struct sbp2_login_response
));
1203 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1204 data
[1] = lu
->login_orb_dma
;
1205 sbp2util_cpu_to_be32_buffer(data
, 8);
1207 hpsb_node_write(lu
->ne
, lu
->management_agent_addr
, data
, 8);
1209 /* wait up to 20 seconds for login status */
1210 if (sbp2util_access_timeout(lu
, 20*HZ
)) {
1211 SBP2_ERR("Error logging into SBP-2 device - timed out");
1215 /* make sure that the returned status matches the login ORB */
1216 if (lu
->status_block
.ORB_offset_lo
!= lu
->login_orb_dma
) {
1217 SBP2_ERR("Error logging into SBP-2 device - timed out");
1221 if (STATUS_TEST_RDS(lu
->status_block
.ORB_offset_hi_misc
)) {
1222 SBP2_ERR("Error logging into SBP-2 device - failed");
1226 sbp2util_cpu_to_be32_buffer(lu
->login_response
,
1227 sizeof(struct sbp2_login_response
));
1228 lu
->command_block_agent_addr
=
1229 ((u64
)lu
->login_response
->command_block_agent_hi
) << 32;
1230 lu
->command_block_agent_addr
|=
1231 ((u64
)lu
->login_response
->command_block_agent_lo
);
1232 lu
->command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1234 SBP2_INFO("Logged into SBP-2 device");
1238 static int sbp2_logout_device(struct sbp2_lu
*lu
)
1240 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1244 lu
->logout_orb
->reserved1
= 0x0;
1245 lu
->logout_orb
->reserved2
= 0x0;
1246 lu
->logout_orb
->reserved3
= 0x0;
1247 lu
->logout_orb
->reserved4
= 0x0;
1249 lu
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1250 lu
->logout_orb
->login_ID_misc
|=
1251 ORB_SET_LOGIN_ID(lu
->login_response
->length_login_ID
);
1252 lu
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1254 lu
->logout_orb
->reserved5
= 0x0;
1255 lu
->logout_orb
->status_fifo_hi
=
1256 ORB_SET_STATUS_FIFO_HI(lu
->status_fifo_addr
, hi
->host
->node_id
);
1257 lu
->logout_orb
->status_fifo_lo
=
1258 ORB_SET_STATUS_FIFO_LO(lu
->status_fifo_addr
);
1260 sbp2util_cpu_to_be32_buffer(lu
->logout_orb
,
1261 sizeof(struct sbp2_logout_orb
));
1263 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1264 data
[1] = lu
->logout_orb_dma
;
1265 sbp2util_cpu_to_be32_buffer(data
, 8);
1267 error
= hpsb_node_write(lu
->ne
, lu
->management_agent_addr
, data
, 8);
1271 /* wait up to 1 second for the device to complete logout */
1272 if (sbp2util_access_timeout(lu
, HZ
))
1275 SBP2_INFO("Logged out of SBP-2 device");
1279 static int sbp2_reconnect_device(struct sbp2_lu
*lu
)
1281 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1285 lu
->reconnect_orb
->reserved1
= 0x0;
1286 lu
->reconnect_orb
->reserved2
= 0x0;
1287 lu
->reconnect_orb
->reserved3
= 0x0;
1288 lu
->reconnect_orb
->reserved4
= 0x0;
1290 lu
->reconnect_orb
->login_ID_misc
=
1291 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1292 lu
->reconnect_orb
->login_ID_misc
|=
1293 ORB_SET_LOGIN_ID(lu
->login_response
->length_login_ID
);
1294 lu
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1296 lu
->reconnect_orb
->reserved5
= 0x0;
1297 lu
->reconnect_orb
->status_fifo_hi
=
1298 ORB_SET_STATUS_FIFO_HI(lu
->status_fifo_addr
, hi
->host
->node_id
);
1299 lu
->reconnect_orb
->status_fifo_lo
=
1300 ORB_SET_STATUS_FIFO_LO(lu
->status_fifo_addr
);
1302 sbp2util_cpu_to_be32_buffer(lu
->reconnect_orb
,
1303 sizeof(struct sbp2_reconnect_orb
));
1305 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1306 data
[1] = lu
->reconnect_orb_dma
;
1307 sbp2util_cpu_to_be32_buffer(data
, 8);
1309 error
= hpsb_node_write(lu
->ne
, lu
->management_agent_addr
, data
, 8);
1313 /* wait up to 1 second for reconnect status */
1314 if (sbp2util_access_timeout(lu
, HZ
)) {
1315 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1319 /* make sure that the returned status matches the reconnect ORB */
1320 if (lu
->status_block
.ORB_offset_lo
!= lu
->reconnect_orb_dma
) {
1321 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
1325 if (STATUS_TEST_RDS(lu
->status_block
.ORB_offset_hi_misc
)) {
1326 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
1330 SBP2_INFO("Reconnected to SBP-2 device");
1335 * Set the target node's Single Phase Retry limit. Affects the target's retry
1336 * behaviour if our node is too busy to accept requests.
1338 static int sbp2_set_busy_timeout(struct sbp2_lu
*lu
)
1342 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1343 if (hpsb_node_write(lu
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4))
1344 SBP2_ERR("%s error", __func__
);
1348 static void sbp2_parse_unit_directory(struct sbp2_lu
*lu
,
1349 struct unit_directory
*ud
)
1351 struct csr1212_keyval
*kv
;
1352 struct csr1212_dentry
*dentry
;
1353 u64 management_agent_addr
;
1354 u32 unit_characteristics
, firmware_revision
;
1355 unsigned workarounds
;
1358 management_agent_addr
= 0;
1359 unit_characteristics
= 0;
1360 firmware_revision
= 0;
1362 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1363 switch (kv
->key
.id
) {
1364 case CSR1212_KV_ID_DEPENDENT_INFO
:
1365 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
)
1366 management_agent_addr
=
1367 CSR1212_REGISTER_SPACE_BASE
+
1368 (kv
->value
.csr_offset
<< 2);
1370 else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
)
1371 lu
->lun
= ORB_SET_LUN(kv
->value
.immediate
);
1374 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1375 /* FIXME: This is ignored so far.
1376 * See SBP-2 clause 7.4.8. */
1377 unit_characteristics
= kv
->value
.immediate
;
1380 case SBP2_FIRMWARE_REVISION_KEY
:
1381 firmware_revision
= kv
->value
.immediate
;
1385 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1386 * Its "ordered" bit has consequences for command ORB
1387 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
1392 workarounds
= sbp2_default_workarounds
;
1394 if (!(workarounds
& SBP2_WORKAROUND_OVERRIDE
))
1395 for (i
= 0; i
< ARRAY_SIZE(sbp2_workarounds_table
); i
++) {
1396 if (sbp2_workarounds_table
[i
].firmware_revision
!=
1397 SBP2_ROM_VALUE_WILDCARD
&&
1398 sbp2_workarounds_table
[i
].firmware_revision
!=
1399 (firmware_revision
& 0xffff00))
1401 if (sbp2_workarounds_table
[i
].model_id
!=
1402 SBP2_ROM_VALUE_WILDCARD
&&
1403 sbp2_workarounds_table
[i
].model_id
!= ud
->model_id
)
1405 workarounds
|= sbp2_workarounds_table
[i
].workarounds
;
1410 SBP2_INFO("Workarounds for node " NODE_BUS_FMT
": 0x%x "
1411 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1412 " model_id 0x%06x)",
1413 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1414 workarounds
, firmware_revision
,
1415 ud
->vendor_id
? ud
->vendor_id
: ud
->ne
->vendor_id
,
1418 /* We would need one SCSI host template for each target to adjust
1419 * max_sectors on the fly, therefore warn only. */
1420 if (workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
&&
1421 (sbp2_max_sectors
* 512) > (128 * 1024))
1422 SBP2_INFO("Node " NODE_BUS_FMT
": Bridge only supports 128KB "
1423 "max transfer size. WARNING: Current max_sectors "
1424 "setting is larger than 128KB (%d sectors)",
1425 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
),
1428 /* If this is a logical unit directory entry, process the parent
1429 * to get the values. */
1430 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1431 struct unit_directory
*parent_ud
= container_of(
1432 ud
->device
.parent
, struct unit_directory
, device
);
1433 sbp2_parse_unit_directory(lu
, parent_ud
);
1435 lu
->management_agent_addr
= management_agent_addr
;
1436 lu
->workarounds
= workarounds
;
1437 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1438 lu
->lun
= ORB_SET_LUN(ud
->lun
);
1442 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1445 * This function is called in order to determine the max speed and packet
1446 * size we can use in our ORBs. Note, that we (the driver and host) only
1447 * initiate the transaction. The SBP-2 device actually transfers the data
1448 * (by reading from the DMA area we tell it). This means that the SBP-2
1449 * device decides the actual maximum data it can transfer. We just tell it
1450 * the speed that it needs to use, and the max_rec the host supports, and
1451 * it takes care of the rest.
1453 static int sbp2_max_speed_and_size(struct sbp2_lu
*lu
)
1455 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1458 lu
->speed_code
= hi
->host
->speed
[NODEID_TO_NODE(lu
->ne
->nodeid
)];
1460 if (lu
->speed_code
> sbp2_max_speed
) {
1461 lu
->speed_code
= sbp2_max_speed
;
1462 SBP2_INFO("Reducing speed to %s",
1463 hpsb_speedto_str
[sbp2_max_speed
]);
1466 /* Payload size is the lesser of what our speed supports and what
1467 * our host supports. */
1468 payload
= min(sbp2_speedto_max_payload
[lu
->speed_code
],
1469 (u8
) (hi
->host
->csr
.max_rec
- 1));
1471 /* If physical DMA is off, work around limitation in ohci1394:
1472 * packet size must not exceed PAGE_SIZE */
1473 if (lu
->ne
->host
->low_addr_space
< (1ULL << 32))
1474 while (SBP2_PAYLOAD_TO_BYTES(payload
) + 24 > PAGE_SIZE
&&
1478 SBP2_INFO("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1479 NODE_BUS_ARGS(hi
->host
, lu
->ne
->nodeid
),
1480 hpsb_speedto_str
[lu
->speed_code
],
1481 SBP2_PAYLOAD_TO_BYTES(payload
));
1483 lu
->max_payload_size
= payload
;
1487 static int sbp2_agent_reset(struct sbp2_lu
*lu
, int wait
)
1492 unsigned long flags
;
1494 /* flush lu->protocol_work */
1496 flush_scheduled_work();
1498 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1499 addr
= lu
->command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1502 retval
= hpsb_node_write(lu
->ne
, addr
, &data
, 4);
1504 retval
= sbp2util_node_write_no_wait(lu
->ne
, addr
, &data
, 4);
1507 SBP2_ERR("hpsb_node_write failed.\n");
1511 /* make sure that the ORB_POINTER is written on next command */
1512 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
1513 lu
->last_orb
= NULL
;
1514 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
1519 static int sbp2_prep_command_orb_sg(struct sbp2_command_orb
*orb
,
1520 struct sbp2_fwhost_info
*hi
,
1521 struct sbp2_command_info
*cmd
,
1522 unsigned int sg_count
,
1523 struct scatterlist
*sg
,
1525 enum dma_data_direction dma_dir
)
1527 struct device
*dmadev
= hi
->host
->device
.parent
;
1528 struct sbp2_unrestricted_page_table
*pt
;
1531 n
= dma_map_sg(dmadev
, sg
, sg_count
, dma_dir
);
1535 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1536 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1538 /* special case if only one element (and less than 64KB in size) */
1540 orb
->misc
|= ORB_SET_DATA_SIZE(sg_dma_len(sg
));
1541 orb
->data_descriptor_lo
= sg_dma_address(sg
);
1543 pt
= &cmd
->scatter_gather_element
[0];
1545 dma_sync_single_for_cpu(dmadev
, cmd
->sge_dma
,
1546 sizeof(cmd
->scatter_gather_element
),
1549 for_each_sg(sg
, sg
, n
, i
) {
1550 pt
[i
].high
= cpu_to_be32(sg_dma_len(sg
) << 16);
1551 pt
[i
].low
= cpu_to_be32(sg_dma_address(sg
));
1554 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1) |
1555 ORB_SET_DATA_SIZE(n
);
1556 orb
->data_descriptor_lo
= cmd
->sge_dma
;
1558 dma_sync_single_for_device(dmadev
, cmd
->sge_dma
,
1559 sizeof(cmd
->scatter_gather_element
),
1565 static int sbp2_create_command_orb(struct sbp2_lu
*lu
,
1566 struct sbp2_command_info
*cmd
,
1567 struct scsi_cmnd
*SCpnt
)
1569 struct device
*dmadev
= lu
->hi
->host
->device
.parent
;
1570 struct sbp2_command_orb
*orb
= &cmd
->command_orb
;
1571 unsigned int scsi_request_bufflen
= scsi_bufflen(SCpnt
);
1572 enum dma_data_direction dma_dir
= SCpnt
->sc_data_direction
;
1576 dma_sync_single_for_cpu(dmadev
, cmd
->command_orb_dma
,
1577 sizeof(struct sbp2_command_orb
), DMA_TO_DEVICE
);
1579 * Set-up our command ORB.
1581 * NOTE: We're doing unrestricted page tables (s/g), as this is
1582 * best performance (at least with the devices I have). This means
1583 * that data_size becomes the number of s/g elements, and
1584 * page_size should be zero (for unrestricted).
1586 orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1587 orb
->next_ORB_lo
= 0x0;
1588 orb
->misc
= ORB_SET_MAX_PAYLOAD(lu
->max_payload_size
);
1589 orb
->misc
|= ORB_SET_SPEED(lu
->speed_code
);
1590 orb
->misc
|= ORB_SET_NOTIFY(1);
1592 if (dma_dir
== DMA_NONE
)
1593 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1594 else if (dma_dir
== DMA_TO_DEVICE
&& scsi_request_bufflen
)
1595 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1596 else if (dma_dir
== DMA_FROM_DEVICE
&& scsi_request_bufflen
)
1597 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1599 SBP2_INFO("Falling back to DMA_NONE");
1600 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1603 /* set up our page table stuff */
1604 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1605 orb
->data_descriptor_hi
= 0x0;
1606 orb
->data_descriptor_lo
= 0x0;
1607 orb
->misc
|= ORB_SET_DIRECTION(1);
1610 ret
= sbp2_prep_command_orb_sg(orb
, lu
->hi
, cmd
,
1611 scsi_sg_count(SCpnt
),
1613 orb_direction
, dma_dir
);
1615 sbp2util_cpu_to_be32_buffer(orb
, sizeof(*orb
));
1617 memset(orb
->cdb
, 0, sizeof(orb
->cdb
));
1618 memcpy(orb
->cdb
, SCpnt
->cmnd
, SCpnt
->cmd_len
);
1620 dma_sync_single_for_device(dmadev
, cmd
->command_orb_dma
,
1621 sizeof(struct sbp2_command_orb
), DMA_TO_DEVICE
);
1625 static void sbp2_link_orb_command(struct sbp2_lu
*lu
,
1626 struct sbp2_command_info
*cmd
)
1628 struct sbp2_fwhost_info
*hi
= lu
->hi
;
1629 struct sbp2_command_orb
*last_orb
;
1630 dma_addr_t last_orb_dma
;
1631 u64 addr
= lu
->command_block_agent_addr
;
1634 unsigned long flags
;
1636 /* check to see if there are any previous orbs to use */
1637 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
1638 last_orb
= lu
->last_orb
;
1639 last_orb_dma
= lu
->last_orb_dma
;
1642 * last_orb == NULL means: We know that the target's fetch agent
1643 * is not active right now.
1645 addr
+= SBP2_ORB_POINTER_OFFSET
;
1646 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1647 data
[1] = cmd
->command_orb_dma
;
1648 sbp2util_cpu_to_be32_buffer(data
, 8);
1652 * last_orb != NULL means: We know that the target's fetch agent
1653 * is (very probably) not dead or in reset state right now.
1654 * We have an ORB already sent that we can append a new one to.
1655 * The target's fetch agent may or may not have read this
1658 dma_sync_single_for_cpu(hi
->host
->device
.parent
, last_orb_dma
,
1659 sizeof(struct sbp2_command_orb
),
1661 last_orb
->next_ORB_lo
= cpu_to_be32(cmd
->command_orb_dma
);
1663 /* Tells hardware that this pointer is valid */
1664 last_orb
->next_ORB_hi
= 0;
1665 dma_sync_single_for_device(hi
->host
->device
.parent
,
1667 sizeof(struct sbp2_command_orb
),
1669 addr
+= SBP2_DOORBELL_OFFSET
;
1673 lu
->last_orb
= &cmd
->command_orb
;
1674 lu
->last_orb_dma
= cmd
->command_orb_dma
;
1675 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
1677 if (sbp2util_node_write_no_wait(lu
->ne
, addr
, data
, length
)) {
1679 * sbp2util_node_write_no_wait failed. We certainly ran out
1680 * of transaction labels, perhaps just because there were no
1681 * context switches which gave khpsbpkt a chance to collect
1682 * free tlabels. Try again in non-atomic context. If necessary,
1683 * the workqueue job will sleep to guaranteedly get a tlabel.
1684 * We do not accept new commands until the job is over.
1686 scsi_block_requests(lu
->shost
);
1687 PREPARE_WORK(&lu
->protocol_work
,
1688 last_orb
? sbp2util_write_doorbell
:
1689 sbp2util_write_orb_pointer
);
1690 schedule_work(&lu
->protocol_work
);
1694 static int sbp2_send_command(struct sbp2_lu
*lu
, struct scsi_cmnd
*SCpnt
,
1695 void (*done
)(struct scsi_cmnd
*))
1697 struct sbp2_command_info
*cmd
;
1699 cmd
= sbp2util_allocate_command_orb(lu
, SCpnt
, done
);
1703 if (sbp2_create_command_orb(lu
, cmd
, SCpnt
))
1706 sbp2_link_orb_command(lu
, cmd
);
1711 * Translates SBP-2 status into SCSI sense data for check conditions
1713 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
,
1716 /* OK, it's pretty ugly... ;-) */
1717 sense_data
[0] = 0x70;
1718 sense_data
[1] = 0x0;
1719 sense_data
[2] = sbp2_status
[9];
1720 sense_data
[3] = sbp2_status
[12];
1721 sense_data
[4] = sbp2_status
[13];
1722 sense_data
[5] = sbp2_status
[14];
1723 sense_data
[6] = sbp2_status
[15];
1725 sense_data
[8] = sbp2_status
[16];
1726 sense_data
[9] = sbp2_status
[17];
1727 sense_data
[10] = sbp2_status
[18];
1728 sense_data
[11] = sbp2_status
[19];
1729 sense_data
[12] = sbp2_status
[10];
1730 sense_data
[13] = sbp2_status
[11];
1731 sense_data
[14] = sbp2_status
[20];
1732 sense_data
[15] = sbp2_status
[21];
1734 return sbp2_status
[8] & 0x3f;
1737 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
,
1738 int destid
, quadlet_t
*data
, u64 addr
,
1739 size_t length
, u16 fl
)
1741 struct sbp2_fwhost_info
*hi
;
1742 struct sbp2_lu
*lu
= NULL
, *lu_tmp
;
1743 struct scsi_cmnd
*SCpnt
= NULL
;
1744 struct sbp2_status_block
*sb
;
1745 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
1746 struct sbp2_command_info
*cmd
;
1747 unsigned long flags
;
1749 if (unlikely(length
< 8 || length
> sizeof(struct sbp2_status_block
))) {
1750 SBP2_ERR("Wrong size of status block");
1751 return RCODE_ADDRESS_ERROR
;
1753 if (unlikely(!host
)) {
1754 SBP2_ERR("host is NULL - this is bad!");
1755 return RCODE_ADDRESS_ERROR
;
1757 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
1758 if (unlikely(!hi
)) {
1759 SBP2_ERR("host info is NULL - this is bad!");
1760 return RCODE_ADDRESS_ERROR
;
1763 /* Find the unit which wrote the status. */
1764 read_lock_irqsave(&sbp2_hi_logical_units_lock
, flags
);
1765 list_for_each_entry(lu_tmp
, &hi
->logical_units
, lu_list
) {
1766 if (lu_tmp
->ne
->nodeid
== nodeid
&&
1767 lu_tmp
->status_fifo_addr
== addr
) {
1772 read_unlock_irqrestore(&sbp2_hi_logical_units_lock
, flags
);
1774 if (unlikely(!lu
)) {
1775 SBP2_ERR("lu is NULL - device is gone?");
1776 return RCODE_ADDRESS_ERROR
;
1779 /* Put response into lu status fifo buffer. The first two bytes
1780 * come in big endian bit order. Often the target writes only a
1781 * truncated status block, minimally the first two quadlets. The rest
1782 * is implied to be zeros. */
1783 sb
= &lu
->status_block
;
1784 memset(sb
->command_set_dependent
, 0, sizeof(sb
->command_set_dependent
));
1785 memcpy(sb
, data
, length
);
1786 sbp2util_be32_to_cpu_buffer(sb
, 8);
1788 /* Ignore unsolicited status. Handle command ORB status. */
1789 if (unlikely(STATUS_GET_SRC(sb
->ORB_offset_hi_misc
) == 2))
1792 cmd
= sbp2util_find_command_for_orb(lu
, sb
->ORB_offset_lo
);
1794 /* Grab SCSI command pointers and check status. */
1796 * FIXME: If the src field in the status is 1, the ORB DMA must
1797 * not be reused until status for a subsequent ORB is received.
1799 SCpnt
= cmd
->Current_SCpnt
;
1800 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
1801 sbp2util_mark_command_completed(lu
, cmd
);
1802 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
1805 u32 h
= sb
->ORB_offset_hi_misc
;
1806 u32 r
= STATUS_GET_RESP(h
);
1808 if (r
!= RESP_STATUS_REQUEST_COMPLETE
) {
1809 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
1810 r
, STATUS_GET_SBP_STATUS(h
));
1812 r
== RESP_STATUS_TRANSPORT_FAILURE
?
1813 SBP2_SCSI_STATUS_BUSY
:
1814 SBP2_SCSI_STATUS_COMMAND_TERMINATED
;
1817 if (STATUS_GET_LEN(h
) > 1)
1818 scsi_status
= sbp2_status_to_sense_data(
1819 (unchar
*)sb
, SCpnt
->sense_buffer
);
1821 if (STATUS_TEST_DEAD(h
))
1822 sbp2_agent_reset(lu
, 0);
1825 /* Check here to see if there are no commands in-use. If there
1826 * are none, we know that the fetch agent left the active state
1827 * _and_ that we did not reactivate it yet. Therefore clear
1828 * last_orb so that next time we write directly to the
1829 * ORB_POINTER register. That way the fetch agent does not need
1830 * to refetch the next_ORB. */
1831 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
1832 if (list_empty(&lu
->cmd_orb_inuse
))
1833 lu
->last_orb
= NULL
;
1834 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
1837 /* It's probably status after a management request. */
1838 if ((sb
->ORB_offset_lo
== lu
->reconnect_orb_dma
) ||
1839 (sb
->ORB_offset_lo
== lu
->login_orb_dma
) ||
1840 (sb
->ORB_offset_lo
== lu
->query_logins_orb_dma
) ||
1841 (sb
->ORB_offset_lo
== lu
->logout_orb_dma
)) {
1842 lu
->access_complete
= 1;
1843 wake_up_interruptible(&sbp2_access_wq
);
1848 sbp2scsi_complete_command(lu
, scsi_status
, SCpnt
,
1850 return RCODE_COMPLETE
;
1853 /**************************************
1854 * SCSI interface related section
1855 **************************************/
1857 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
1858 void (*done
)(struct scsi_cmnd
*))
1860 struct sbp2_lu
*lu
= (struct sbp2_lu
*)SCpnt
->device
->host
->hostdata
[0];
1861 struct sbp2_fwhost_info
*hi
;
1862 int result
= DID_NO_CONNECT
<< 16;
1864 if (unlikely(!sbp2util_node_is_available(lu
)))
1869 if (unlikely(!hi
)) {
1870 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
1874 /* Multiple units are currently represented to the SCSI core as separate
1875 * targets, not as one target with multiple LUs. Therefore return
1876 * selection time-out to any IO directed at non-zero LUNs. */
1877 if (unlikely(SCpnt
->device
->lun
))
1880 if (unlikely(!hpsb_node_entry_valid(lu
->ne
))) {
1881 SBP2_ERR("Bus reset in progress - rejecting command");
1882 result
= DID_BUS_BUSY
<< 16;
1886 /* Bidirectional commands are not yet implemented,
1887 * and unknown transfer direction not handled. */
1888 if (unlikely(SCpnt
->sc_data_direction
== DMA_BIDIRECTIONAL
)) {
1889 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1890 result
= DID_ERROR
<< 16;
1894 if (sbp2_send_command(lu
, SCpnt
, done
)) {
1895 SBP2_ERR("Error sending SCSI command");
1896 sbp2scsi_complete_command(lu
,
1897 SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
1903 SCpnt
->result
= result
;
1908 static void sbp2scsi_complete_all_commands(struct sbp2_lu
*lu
, u32 status
)
1910 struct list_head
*lh
;
1911 struct sbp2_command_info
*cmd
;
1912 unsigned long flags
;
1914 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
1915 while (!list_empty(&lu
->cmd_orb_inuse
)) {
1916 lh
= lu
->cmd_orb_inuse
.next
;
1917 cmd
= list_entry(lh
, struct sbp2_command_info
, list
);
1918 sbp2util_mark_command_completed(lu
, cmd
);
1919 if (cmd
->Current_SCpnt
) {
1920 cmd
->Current_SCpnt
->result
= status
<< 16;
1921 cmd
->Current_done(cmd
->Current_SCpnt
);
1924 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
1930 * Complete a regular SCSI command. Can be called in atomic context.
1932 static void sbp2scsi_complete_command(struct sbp2_lu
*lu
, u32 scsi_status
,
1933 struct scsi_cmnd
*SCpnt
,
1934 void (*done
)(struct scsi_cmnd
*))
1937 SBP2_ERR("SCpnt is NULL");
1941 switch (scsi_status
) {
1942 case SBP2_SCSI_STATUS_GOOD
:
1943 SCpnt
->result
= DID_OK
<< 16;
1946 case SBP2_SCSI_STATUS_BUSY
:
1947 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1948 SCpnt
->result
= DID_BUS_BUSY
<< 16;
1951 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
1952 SCpnt
->result
= CHECK_CONDITION
<< 1 | DID_OK
<< 16;
1955 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
1956 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1957 SCpnt
->result
= DID_NO_CONNECT
<< 16;
1958 scsi_print_command(SCpnt
);
1961 case SBP2_SCSI_STATUS_CONDITION_MET
:
1962 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
1963 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
1964 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
1965 SCpnt
->result
= DID_ERROR
<< 16;
1966 scsi_print_command(SCpnt
);
1970 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
1971 SCpnt
->result
= DID_ERROR
<< 16;
1974 /* If a bus reset is in progress and there was an error, complete
1975 * the command as busy so that it will get retried. */
1976 if (!hpsb_node_entry_valid(lu
->ne
)
1977 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
1978 SBP2_ERR("Completing command with busy (bus reset)");
1979 SCpnt
->result
= DID_BUS_BUSY
<< 16;
1982 /* Tell the SCSI stack that we're done with this command. */
1986 static int sbp2scsi_slave_alloc(struct scsi_device
*sdev
)
1988 struct sbp2_lu
*lu
= (struct sbp2_lu
*)sdev
->host
->hostdata
[0];
1990 if (sdev
->lun
!= 0 || sdev
->id
!= lu
->ud
->id
|| sdev
->channel
!= 0)
1994 sdev
->allow_restart
= 1;
1996 /* SBP-2 requires quadlet alignment of the data buffers. */
1997 blk_queue_update_dma_alignment(sdev
->request_queue
, 4 - 1);
1999 if (lu
->workarounds
& SBP2_WORKAROUND_INQUIRY_36
)
2000 sdev
->inquiry_len
= 36;
2004 static int sbp2scsi_slave_configure(struct scsi_device
*sdev
)
2006 struct sbp2_lu
*lu
= (struct sbp2_lu
*)sdev
->host
->hostdata
[0];
2008 sdev
->use_10_for_rw
= 1;
2010 if (sbp2_exclusive_login
)
2011 sdev
->manage_start_stop
= 1;
2012 if (sdev
->type
== TYPE_ROM
)
2013 sdev
->use_10_for_ms
= 1;
2014 if (sdev
->type
== TYPE_DISK
&&
2015 lu
->workarounds
& SBP2_WORKAROUND_MODE_SENSE_8
)
2016 sdev
->skip_ms_page_8
= 1;
2017 if (lu
->workarounds
& SBP2_WORKAROUND_FIX_CAPACITY
)
2018 sdev
->fix_capacity
= 1;
2019 if (lu
->workarounds
& SBP2_WORKAROUND_POWER_CONDITION
)
2020 sdev
->start_stop_pwr_cond
= 1;
2021 if (lu
->workarounds
& SBP2_WORKAROUND_128K_MAX_TRANS
)
2022 blk_queue_max_sectors(sdev
->request_queue
, 128 * 1024 / 512);
2024 blk_queue_max_segment_size(sdev
->request_queue
, SBP2_MAX_SEG_SIZE
);
2028 static void sbp2scsi_slave_destroy(struct scsi_device
*sdev
)
2030 ((struct sbp2_lu
*)sdev
->host
->hostdata
[0])->sdev
= NULL
;
2035 * Called by scsi stack when something has really gone wrong.
2036 * Usually called when a command has timed-out for some reason.
2038 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2040 struct sbp2_lu
*lu
= (struct sbp2_lu
*)SCpnt
->device
->host
->hostdata
[0];
2041 struct sbp2_command_info
*cmd
;
2042 unsigned long flags
;
2044 SBP2_INFO("aborting sbp2 command");
2045 scsi_print_command(SCpnt
);
2047 if (sbp2util_node_is_available(lu
)) {
2048 sbp2_agent_reset(lu
, 1);
2050 /* Return a matching command structure to the free pool. */
2051 spin_lock_irqsave(&lu
->cmd_orb_lock
, flags
);
2052 cmd
= sbp2util_find_command_for_SCpnt(lu
, SCpnt
);
2054 sbp2util_mark_command_completed(lu
, cmd
);
2055 if (cmd
->Current_SCpnt
) {
2056 cmd
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2057 cmd
->Current_done(cmd
->Current_SCpnt
);
2060 spin_unlock_irqrestore(&lu
->cmd_orb_lock
, flags
);
2062 sbp2scsi_complete_all_commands(lu
, DID_BUS_BUSY
);
2069 * Called by scsi stack when something has really gone wrong.
2071 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2073 struct sbp2_lu
*lu
= (struct sbp2_lu
*)SCpnt
->device
->host
->hostdata
[0];
2075 SBP2_INFO("reset requested");
2077 if (sbp2util_node_is_available(lu
)) {
2078 SBP2_INFO("generating sbp2 fetch agent reset");
2079 sbp2_agent_reset(lu
, 1);
2085 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
,
2086 struct device_attribute
*attr
,
2089 struct scsi_device
*sdev
;
2092 if (!(sdev
= to_scsi_device(dev
)))
2095 if (!(lu
= (struct sbp2_lu
*)sdev
->host
->hostdata
[0]))
2098 if (sbp2_long_sysfs_ieee1394_id
)
2099 return sprintf(buf
, "%016Lx:%06x:%04x\n",
2100 (unsigned long long)lu
->ne
->guid
,
2101 lu
->ud
->directory_id
, ORB_SET_LUN(lu
->lun
));
2103 return sprintf(buf
, "%016Lx:%d:%d\n",
2104 (unsigned long long)lu
->ne
->guid
,
2105 lu
->ud
->id
, ORB_SET_LUN(lu
->lun
));
2108 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2109 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2110 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2111 MODULE_LICENSE("GPL");
2113 static int sbp2_module_init(void)
2117 if (sbp2_serialize_io
) {
2118 sbp2_shost_template
.can_queue
= 1;
2119 sbp2_shost_template
.cmd_per_lun
= 1;
2122 sbp2_shost_template
.max_sectors
= sbp2_max_sectors
;
2124 hpsb_register_highlevel(&sbp2_highlevel
);
2125 ret
= hpsb_register_protocol(&sbp2_driver
);
2127 SBP2_ERR("Failed to register protocol");
2128 hpsb_unregister_highlevel(&sbp2_highlevel
);
2134 static void __exit
sbp2_module_exit(void)
2136 hpsb_unregister_protocol(&sbp2_driver
);
2137 hpsb_unregister_highlevel(&sbp2_highlevel
);
2140 module_init(sbp2_module_init
);
2141 module_exit(sbp2_module_exit
);