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1da177e4 LT |
1 | /* |
2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 | |
3 | * | |
4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) | |
5 | * jamesg@filanet.com (JSG) | |
6 | * | |
7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Brief Description: | |
26 | * | |
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. | |
31 | * | |
2a533b17 SR |
32 | * You may access any attached SBP-2 (usually storage devices) as regular |
33 | * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc.. | |
1da177e4 | 34 | * |
2a533b17 SR |
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. | |
1da177e4 | 37 | * |
2a533b17 SR |
38 | * TODO: |
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 | |
2a533b17 | 51 | * Grep for inline FIXME comments below. |
1da177e4 LT |
52 | */ |
53 | ||
4e6343a1 | 54 | #include <linux/blkdev.h> |
902abed1 SR |
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> | |
1da177e4 LT |
61 | #include <linux/kernel.h> |
62 | #include <linux/list.h> | |
f84c922b | 63 | #include <linux/mm.h> |
1da177e4 LT |
64 | #include <linux/module.h> |
65 | #include <linux/moduleparam.h> | |
f84c922b | 66 | #include <linux/sched.h> |
902abed1 SR |
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> | |
e8398bb7 | 73 | #include <linux/wait.h> |
20e2008e | 74 | #include <linux/workqueue.h> |
87ae9afd | 75 | #include <linux/scatterlist.h> |
1da177e4 | 76 | |
1da177e4 | 77 | #include <asm/byteorder.h> |
902abed1 SR |
78 | #include <asm/errno.h> |
79 | #include <asm/param.h> | |
902abed1 SR |
80 | #include <asm/system.h> |
81 | #include <asm/types.h> | |
82 | ||
83 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
84 | #include <asm/io.h> /* for bus_to_virt */ | |
85 | #endif | |
1da177e4 LT |
86 | |
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> | |
92 | ||
93 | #include "csr1212.h" | |
902abed1 SR |
94 | #include "highlevel.h" |
95 | #include "hosts.h" | |
1da177e4 | 96 | #include "ieee1394.h" |
1da177e4 | 97 | #include "ieee1394_core.h" |
902abed1 | 98 | #include "ieee1394_hotplug.h" |
1da177e4 | 99 | #include "ieee1394_transactions.h" |
902abed1 SR |
100 | #include "ieee1394_types.h" |
101 | #include "nodemgr.h" | |
1da177e4 LT |
102 | #include "sbp2.h" |
103 | ||
1da177e4 LT |
104 | /* |
105 | * Module load parameter definitions | |
106 | */ | |
107 | ||
108 | /* | |
109 | * Change max_speed on module load if you have a bad IEEE-1394 | |
110 | * controller that has trouble running 2KB packets at 400mb. | |
111 | * | |
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. | |
115 | */ | |
ca0c7453 SR |
116 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
117 | module_param_named(max_speed, sbp2_max_speed, int, 0644); | |
28b06679 SR |
118 | MODULE_PARM_DESC(max_speed, "Force max speed " |
119 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); | |
1da177e4 LT |
120 | |
121 | /* | |
77bba7ae SR |
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. | |
1da177e4 | 124 | */ |
ca0c7453 | 125 | static int sbp2_serialize_io = 1; |
77bba7ae SR |
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)"); | |
1da177e4 LT |
129 | |
130 | /* | |
4e6343a1 SR |
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. | |
136 | * | |
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. | |
1da177e4 | 141 | */ |
4e6343a1 | 142 | static int sbp2_max_sectors; |
ca0c7453 SR |
143 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); |
144 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " | |
4e6343a1 | 145 | "(default = 0 = use SCSI stack's default)"); |
1da177e4 LT |
146 | |
147 | /* | |
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 | |
20f45781 BC |
153 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
154 | * File System, or Lustre, then set exclusive_login to zero. | |
155 | * | |
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. | |
1da177e4 | 159 | */ |
ca0c7453 | 160 | static int sbp2_exclusive_login = 1; |
77bba7ae | 161 | module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644); |
ca0c7453 | 162 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
77bba7ae | 163 | "(default = Y, use N for concurrent initiators)"); |
1da177e4 LT |
164 | |
165 | /* | |
24d3bf88 SR |
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 | |
168 | * mailing list. | |
1da177e4 | 169 | * |
24d3bf88 SR |
170 | * - 128kB max transfer |
171 | * Limit transfer size. Necessary for some old bridges. | |
172 | * | |
173 | * - 36 byte inquiry | |
174 | * When scsi_mod probes the device, let the inquiry command look like that | |
175 | * from MS Windows. | |
176 | * | |
177 | * - skip mode page 8 | |
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. | |
e9a1c52c SR |
180 | * |
181 | * - fix capacity | |
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. | |
679c0cd2 SR |
185 | * |
186 | * - override internal blacklist | |
187 | * Instead of adding to the built-in blacklist, use only the workarounds | |
188 | * specified in the module load parameter. | |
189 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 190 | */ |
24d3bf88 SR |
191 | static int sbp2_default_workarounds; |
192 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
193 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
194 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
195 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
196 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 197 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
679c0cd2 | 198 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
199 | ", or a combination)"); |
200 | ||
d7794c86 SR |
201 | /* |
202 | * This influences the format of the sysfs attribute | |
203 | * /sys/bus/scsi/devices/.../ieee1394_id. | |
204 | * | |
205 | * The default format is like in older kernels: %016Lx:%d:%d | |
206 | * It contains the target's EUI-64, a number given to the logical unit by | |
207 | * the ieee1394 driver's nodemgr (starting at 0), and the LUN. | |
208 | * | |
209 | * The long format is: %016Lx:%06x:%04x | |
210 | * It contains the target's EUI-64, the unit directory's directory_ID as per | |
211 | * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the | |
212 | * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI | |
213 | * Architecture Model) rev.2 to 4 annex A. Therefore and because it is | |
214 | * independent of the implementation of the ieee1394 nodemgr, the longer format | |
215 | * is recommended for future use. | |
216 | */ | |
217 | static int sbp2_long_sysfs_ieee1394_id; | |
218 | module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); | |
219 | MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " | |
220 | "(default = backwards-compatible = N, SAM-conforming = Y)"); | |
221 | ||
1da177e4 | 222 | |
edf1fb21 SR |
223 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
224 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
1da177e4 | 225 | |
1da177e4 LT |
226 | /* |
227 | * Globals | |
228 | */ | |
138c8af8 SR |
229 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
230 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, | |
ea42ea0f | 231 | void (*)(struct scsi_cmnd *)); |
138c8af8 SR |
232 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
233 | static int sbp2_start_device(struct sbp2_lu *); | |
234 | static void sbp2_remove_device(struct sbp2_lu *); | |
235 | static int sbp2_login_device(struct sbp2_lu *); | |
236 | static int sbp2_reconnect_device(struct sbp2_lu *); | |
237 | static int sbp2_logout_device(struct sbp2_lu *); | |
ea42ea0f SR |
238 | static void sbp2_host_reset(struct hpsb_host *); |
239 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, | |
240 | u64, size_t, u16); | |
138c8af8 SR |
241 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
242 | static void sbp2_parse_unit_directory(struct sbp2_lu *, | |
ea42ea0f | 243 | struct unit_directory *); |
138c8af8 SR |
244 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
245 | static int sbp2_max_speed_and_size(struct sbp2_lu *); | |
1da177e4 | 246 | |
1da177e4 LT |
247 | |
248 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
249 | ||
261b5f66 SR |
250 | static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); |
251 | ||
1da177e4 | 252 | static struct hpsb_highlevel sbp2_highlevel = { |
ea42ea0f SR |
253 | .name = SBP2_DEVICE_NAME, |
254 | .host_reset = sbp2_host_reset, | |
1da177e4 LT |
255 | }; |
256 | ||
257 | static struct hpsb_address_ops sbp2_ops = { | |
ea42ea0f | 258 | .write = sbp2_handle_status_write |
1da177e4 LT |
259 | }; |
260 | ||
261 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
ea42ea0f SR |
262 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
263 | u64, size_t, u16); | |
264 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, | |
265 | size_t, u16); | |
266 | ||
1da177e4 | 267 | static struct hpsb_address_ops sbp2_physdma_ops = { |
ea42ea0f SR |
268 | .read = sbp2_handle_physdma_read, |
269 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
270 | }; |
271 | #endif | |
272 | ||
ea42ea0f SR |
273 | |
274 | /* | |
275 | * Interface to driver core and IEEE 1394 core | |
276 | */ | |
277 | static struct ieee1394_device_id sbp2_id_table[] = { | |
278 | { | |
279 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, | |
280 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
281 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
282 | {} | |
283 | }; | |
284 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
285 | ||
286 | static int sbp2_probe(struct device *); | |
287 | static int sbp2_remove(struct device *); | |
288 | static int sbp2_update(struct unit_directory *); | |
289 | ||
1da177e4 | 290 | static struct hpsb_protocol_driver sbp2_driver = { |
ed30c26e | 291 | .name = SBP2_DEVICE_NAME, |
1da177e4 LT |
292 | .id_table = sbp2_id_table, |
293 | .update = sbp2_update, | |
294 | .driver = { | |
1da177e4 LT |
295 | .probe = sbp2_probe, |
296 | .remove = sbp2_remove, | |
297 | }, | |
298 | }; | |
299 | ||
ea42ea0f SR |
300 | |
301 | /* | |
302 | * Interface to SCSI core | |
303 | */ | |
304 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, | |
305 | void (*)(struct scsi_cmnd *)); | |
306 | static int sbp2scsi_abort(struct scsi_cmnd *); | |
307 | static int sbp2scsi_reset(struct scsi_cmnd *); | |
308 | static int sbp2scsi_slave_alloc(struct scsi_device *); | |
309 | static int sbp2scsi_slave_configure(struct scsi_device *); | |
310 | static void sbp2scsi_slave_destroy(struct scsi_device *); | |
311 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, | |
312 | struct device_attribute *, char *); | |
313 | ||
314 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
315 | ||
316 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
317 | &dev_attr_ieee1394_id, | |
318 | NULL | |
319 | }; | |
320 | ||
ca0c7453 | 321 | static struct scsi_host_template sbp2_shost_template = { |
ea42ea0f SR |
322 | .module = THIS_MODULE, |
323 | .name = "SBP-2 IEEE-1394", | |
324 | .proc_name = SBP2_DEVICE_NAME, | |
325 | .queuecommand = sbp2scsi_queuecommand, | |
326 | .eh_abort_handler = sbp2scsi_abort, | |
327 | .eh_device_reset_handler = sbp2scsi_reset, | |
328 | .slave_alloc = sbp2scsi_slave_alloc, | |
329 | .slave_configure = sbp2scsi_slave_configure, | |
330 | .slave_destroy = sbp2scsi_slave_destroy, | |
331 | .this_id = -1, | |
332 | .sg_tablesize = SG_ALL, | |
333 | .use_clustering = ENABLE_CLUSTERING, | |
334 | .cmd_per_lun = SBP2_MAX_CMDS, | |
335 | .can_queue = SBP2_MAX_CMDS, | |
ea42ea0f SR |
336 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
337 | }; | |
338 | ||
4618fd30 SR |
339 | /* for match-all entries in sbp2_workarounds_table */ |
340 | #define SBP2_ROM_VALUE_WILDCARD 0x1000000 | |
ea42ea0f | 341 | |
a80614d1 | 342 | /* |
24d3bf88 SR |
343 | * List of devices with known bugs. |
344 | * | |
345 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
346 | * for the type of bridge chip of a device. It yields a few false positives | |
347 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 348 | */ |
24d3bf88 SR |
349 | static const struct { |
350 | u32 firmware_revision; | |
e9a1c52c | 351 | u32 model_id; |
24d3bf88 SR |
352 | unsigned workarounds; |
353 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 354 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 355 | .firmware_revision = 0x002800, |
4b9a3347 | 356 | .model_id = 0x001010, |
24d3bf88 SR |
357 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
358 | SBP2_WORKAROUND_MODE_SENSE_8, | |
359 | }, | |
360 | /* Initio bridges, actually only needed for some older ones */ { | |
361 | .firmware_revision = 0x000200, | |
4618fd30 | 362 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 SR |
363 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
364 | }, | |
365 | /* Symbios bridge */ { | |
366 | .firmware_revision = 0xa0b800, | |
4618fd30 | 367 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 | 368 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
e9a1c52c | 369 | }, |
e9a1c52c SR |
370 | /* iPod 4th generation */ { |
371 | .firmware_revision = 0x0a2700, | |
372 | .model_id = 0x000021, | |
373 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
374 | }, | |
375 | /* iPod mini */ { | |
376 | .firmware_revision = 0x0a2700, | |
377 | .model_id = 0x000023, | |
378 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
379 | }, | |
380 | /* iPod Photo */ { | |
381 | .firmware_revision = 0x0a2700, | |
382 | .model_id = 0x00007e, | |
383 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 384 | } |
1da177e4 LT |
385 | }; |
386 | ||
1da177e4 LT |
387 | /************************************** |
388 | * General utility functions | |
389 | **************************************/ | |
390 | ||
1da177e4 LT |
391 | #ifndef __BIG_ENDIAN |
392 | /* | |
393 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
394 | */ | |
2b01b80b | 395 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
396 | { |
397 | u32 *temp = buffer; | |
398 | ||
399 | for (length = (length >> 2); length--; ) | |
400 | temp[length] = be32_to_cpu(temp[length]); | |
1da177e4 LT |
401 | } |
402 | ||
403 | /* | |
404 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
405 | */ | |
2b01b80b | 406 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
407 | { |
408 | u32 *temp = buffer; | |
409 | ||
410 | for (length = (length >> 2); length--; ) | |
411 | temp[length] = cpu_to_be32(temp[length]); | |
1da177e4 LT |
412 | } |
413 | #else /* BIG_ENDIAN */ | |
414 | /* Why waste the cpu cycles? */ | |
611aa19f SR |
415 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
416 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
417 | #endif |
418 | ||
ca0c7453 | 419 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
e8398bb7 | 420 | |
1da177e4 | 421 | /* |
e8398bb7 SR |
422 | * Waits for completion of an SBP-2 access request. |
423 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 424 | */ |
138c8af8 | 425 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
1da177e4 | 426 | { |
ca0c7453 | 427 | long leftover; |
1da177e4 | 428 | |
ca0c7453 | 429 | leftover = wait_event_interruptible_timeout( |
138c8af8 SR |
430 | sbp2_access_wq, lu->access_complete, timeout); |
431 | lu->access_complete = 0; | |
e8398bb7 | 432 | return leftover <= 0; |
1da177e4 LT |
433 | } |
434 | ||
138c8af8 | 435 | static void sbp2_free_packet(void *packet) |
1da177e4 LT |
436 | { |
437 | hpsb_free_tlabel(packet); | |
438 | hpsb_free_packet(packet); | |
439 | } | |
440 | ||
e8ca5668 SR |
441 | /* |
442 | * This is much like hpsb_node_write(), except it ignores the response | |
443 | * subaction and returns immediately. Can be used from atomic context. | |
1da177e4 LT |
444 | */ |
445 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
138c8af8 | 446 | quadlet_t *buf, size_t len) |
1da177e4 LT |
447 | { |
448 | struct hpsb_packet *packet; | |
449 | ||
138c8af8 | 450 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
a237f35f SR |
451 | if (!packet) |
452 | return -ENOMEM; | |
1da177e4 | 453 | |
138c8af8 | 454 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
1da177e4 | 455 | hpsb_node_fill_packet(ne, packet); |
a237f35f | 456 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
457 | sbp2_free_packet(packet); |
458 | return -EIO; | |
459 | } | |
1da177e4 LT |
460 | return 0; |
461 | } | |
462 | ||
138c8af8 SR |
463 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
464 | quadlet_t *data, size_t len) | |
09ee67ab | 465 | { |
138c8af8 SR |
466 | /* There is a small window after a bus reset within which the node |
467 | * entry's generation is current but the reconnect wasn't completed. */ | |
468 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) | |
09ee67ab SR |
469 | return; |
470 | ||
138c8af8 | 471 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
09ee67ab SR |
472 | data, len)) |
473 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
138c8af8 SR |
474 | |
475 | /* Now accept new SCSI commands, unless a bus reset happended during | |
476 | * hpsb_node_write. */ | |
477 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) | |
478 | scsi_unblock_requests(lu->shost); | |
09ee67ab SR |
479 | } |
480 | ||
c4028958 | 481 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
09ee67ab | 482 | { |
ec9b7e10 | 483 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
09ee67ab SR |
484 | quadlet_t data[2]; |
485 | ||
ec9b7e10 SR |
486 | data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); |
487 | data[1] = lu->last_orb_dma; | |
09ee67ab | 488 | sbp2util_cpu_to_be32_buffer(data, 8); |
ec9b7e10 | 489 | sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); |
09ee67ab SR |
490 | } |
491 | ||
c4028958 | 492 | static void sbp2util_write_doorbell(struct work_struct *work) |
09ee67ab | 493 | { |
ec9b7e10 SR |
494 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
495 | ||
496 | sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); | |
09ee67ab SR |
497 | } |
498 | ||
138c8af8 | 499 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
1da177e4 | 500 | { |
138c8af8 | 501 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 502 | struct sbp2_command_info *cmd; |
3d269cb5 | 503 | int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
1da177e4 | 504 | |
1da177e4 | 505 | for (i = 0; i < orbs; i++) { |
3d269cb5 SR |
506 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
507 | if (!cmd) | |
a237f35f | 508 | return -ENOMEM; |
97d552e3 | 509 | cmd->command_orb_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
510 | &cmd->command_orb, |
511 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 512 | DMA_TO_DEVICE); |
97d552e3 | 513 | cmd->sge_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
514 | &cmd->scatter_gather_element, |
515 | sizeof(cmd->scatter_gather_element), | |
2446a79f | 516 | DMA_TO_DEVICE); |
138c8af8 SR |
517 | INIT_LIST_HEAD(&cmd->list); |
518 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); | |
1da177e4 | 519 | } |
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
a2ee3f9b SR |
523 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, |
524 | struct hpsb_host *host) | |
1da177e4 | 525 | { |
1da177e4 | 526 | struct list_head *lh, *next; |
138c8af8 | 527 | struct sbp2_command_info *cmd; |
1da177e4 LT |
528 | unsigned long flags; |
529 | ||
138c8af8 SR |
530 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
531 | if (!list_empty(&lu->cmd_orb_completed)) | |
532 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { | |
533 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
534 | dma_unmap_single(host->device.parent, |
535 | cmd->command_orb_dma, | |
1da177e4 | 536 | sizeof(struct sbp2_command_orb), |
9b7d9c09 | 537 | DMA_TO_DEVICE); |
97d552e3 | 538 | dma_unmap_single(host->device.parent, cmd->sge_dma, |
138c8af8 | 539 | sizeof(cmd->scatter_gather_element), |
2446a79f | 540 | DMA_TO_DEVICE); |
138c8af8 | 541 | kfree(cmd); |
1da177e4 | 542 | } |
138c8af8 | 543 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
544 | return; |
545 | } | |
546 | ||
547 | /* | |
e8ca5668 SR |
548 | * Finds the sbp2_command for a given outstanding command ORB. |
549 | * Only looks at the in-use list. | |
1da177e4 LT |
550 | */ |
551 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
138c8af8 | 552 | struct sbp2_lu *lu, dma_addr_t orb) |
1da177e4 | 553 | { |
138c8af8 | 554 | struct sbp2_command_info *cmd; |
1da177e4 LT |
555 | unsigned long flags; |
556 | ||
138c8af8 SR |
557 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
558 | if (!list_empty(&lu->cmd_orb_inuse)) | |
559 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
560 | if (cmd->command_orb_dma == orb) { | |
561 | spin_unlock_irqrestore( | |
562 | &lu->cmd_orb_lock, flags); | |
563 | return cmd; | |
1da177e4 | 564 | } |
138c8af8 | 565 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
a237f35f | 566 | return NULL; |
1da177e4 LT |
567 | } |
568 | ||
569 | /* | |
e8ca5668 SR |
570 | * Finds the sbp2_command for a given outstanding SCpnt. |
571 | * Only looks at the in-use list. | |
138c8af8 | 572 | * Must be called with lu->cmd_orb_lock held. |
1da177e4 | 573 | */ |
24c7cd06 | 574 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
138c8af8 | 575 | struct sbp2_lu *lu, void *SCpnt) |
1da177e4 | 576 | { |
138c8af8 | 577 | struct sbp2_command_info *cmd; |
1da177e4 | 578 | |
138c8af8 SR |
579 | if (!list_empty(&lu->cmd_orb_inuse)) |
580 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
581 | if (cmd->Current_SCpnt == SCpnt) | |
582 | return cmd; | |
a237f35f | 583 | return NULL; |
1da177e4 LT |
584 | } |
585 | ||
1da177e4 | 586 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
138c8af8 SR |
587 | struct sbp2_lu *lu, |
588 | struct scsi_cmnd *Current_SCpnt, | |
589 | void (*Current_done)(struct scsi_cmnd *)) | |
1da177e4 LT |
590 | { |
591 | struct list_head *lh; | |
138c8af8 | 592 | struct sbp2_command_info *cmd = NULL; |
1da177e4 LT |
593 | unsigned long flags; |
594 | ||
138c8af8 SR |
595 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
596 | if (!list_empty(&lu->cmd_orb_completed)) { | |
597 | lh = lu->cmd_orb_completed.next; | |
1da177e4 | 598 | list_del(lh); |
138c8af8 SR |
599 | cmd = list_entry(lh, struct sbp2_command_info, list); |
600 | cmd->Current_done = Current_done; | |
601 | cmd->Current_SCpnt = Current_SCpnt; | |
602 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); | |
603 | } else | |
d024ebc6 | 604 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
138c8af8 SR |
605 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
606 | return cmd; | |
1da177e4 LT |
607 | } |
608 | ||
58272c1c SR |
609 | /* |
610 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. | |
611 | * Must be called with lu->cmd_orb_lock held. | |
612 | */ | |
613 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, | |
614 | struct sbp2_command_info *cmd) | |
1da177e4 | 615 | { |
58272c1c | 616 | struct hpsb_host *host = lu->ud->ne->host; |
1da177e4 | 617 | |
138c8af8 SR |
618 | if (cmd->cmd_dma) { |
619 | if (cmd->dma_type == CMD_DMA_SINGLE) | |
97d552e3 | 620 | dma_unmap_single(host->device.parent, cmd->cmd_dma, |
138c8af8 SR |
621 | cmd->dma_size, cmd->dma_dir); |
622 | else if (cmd->dma_type == CMD_DMA_PAGE) | |
97d552e3 | 623 | dma_unmap_page(host->device.parent, cmd->cmd_dma, |
138c8af8 | 624 | cmd->dma_size, cmd->dma_dir); |
edf1fb21 | 625 | /* XXX: Check for CMD_DMA_NONE bug */ |
138c8af8 SR |
626 | cmd->dma_type = CMD_DMA_NONE; |
627 | cmd->cmd_dma = 0; | |
1da177e4 | 628 | } |
138c8af8 | 629 | if (cmd->sge_buffer) { |
97d552e3 | 630 | dma_unmap_sg(host->device.parent, cmd->sge_buffer, |
138c8af8 SR |
631 | cmd->dma_size, cmd->dma_dir); |
632 | cmd->sge_buffer = NULL; | |
1da177e4 | 633 | } |
cd641f68 | 634 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
1da177e4 LT |
635 | } |
636 | ||
abd559b1 | 637 | /* |
138c8af8 | 638 | * Is lu valid? Is the 1394 node still present? |
abd559b1 | 639 | */ |
138c8af8 | 640 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
abd559b1 | 641 | { |
138c8af8 | 642 | return lu && lu->ne && !lu->ne->in_limbo; |
abd559b1 JM |
643 | } |
644 | ||
1da177e4 LT |
645 | /********************************************* |
646 | * IEEE-1394 core driver stack related section | |
647 | *********************************************/ | |
1da177e4 LT |
648 | |
649 | static int sbp2_probe(struct device *dev) | |
650 | { | |
651 | struct unit_directory *ud; | |
138c8af8 | 652 | struct sbp2_lu *lu; |
1da177e4 | 653 | |
1da177e4 LT |
654 | ud = container_of(dev, struct unit_directory, device); |
655 | ||
656 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
657 | * instead. */ | |
658 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
659 | return -ENODEV; | |
660 | ||
138c8af8 SR |
661 | lu = sbp2_alloc_device(ud); |
662 | if (!lu) | |
a237f35f | 663 | return -ENOMEM; |
1da177e4 | 664 | |
138c8af8 SR |
665 | sbp2_parse_unit_directory(lu, ud); |
666 | return sbp2_start_device(lu); | |
1da177e4 LT |
667 | } |
668 | ||
669 | static int sbp2_remove(struct device *dev) | |
670 | { | |
671 | struct unit_directory *ud; | |
138c8af8 | 672 | struct sbp2_lu *lu; |
abd559b1 | 673 | struct scsi_device *sdev; |
1da177e4 | 674 | |
1da177e4 | 675 | ud = container_of(dev, struct unit_directory, device); |
138c8af8 SR |
676 | lu = ud->device.driver_data; |
677 | if (!lu) | |
abd559b1 JM |
678 | return 0; |
679 | ||
138c8af8 | 680 | if (lu->shost) { |
bf637ec3 SR |
681 | /* Get rid of enqueued commands if there is no chance to |
682 | * send them. */ | |
138c8af8 SR |
683 | if (!sbp2util_node_is_available(lu)) |
684 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); | |
e8ca5668 | 685 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
bf637ec3 | 686 | * highlevel drivers which would deadlock if blocked. */ |
138c8af8 SR |
687 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
688 | scsi_unblock_requests(lu->shost); | |
bf637ec3 | 689 | } |
138c8af8 | 690 | sdev = lu->sdev; |
abd559b1 | 691 | if (sdev) { |
138c8af8 | 692 | lu->sdev = NULL; |
abd559b1 JM |
693 | scsi_remove_device(sdev); |
694 | } | |
1da177e4 | 695 | |
138c8af8 SR |
696 | sbp2_logout_device(lu); |
697 | sbp2_remove_device(lu); | |
1da177e4 LT |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
702 | static int sbp2_update(struct unit_directory *ud) | |
703 | { | |
138c8af8 | 704 | struct sbp2_lu *lu = ud->device.driver_data; |
1da177e4 | 705 | |
138c8af8 | 706 | if (sbp2_reconnect_device(lu)) { |
e8ca5668 SR |
707 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
708 | * enough. Try a regular login, but first log out just in | |
709 | * case of any weirdness. */ | |
138c8af8 | 710 | sbp2_logout_device(lu); |
1da177e4 | 711 | |
138c8af8 | 712 | if (sbp2_login_device(lu)) { |
1da177e4 LT |
713 | /* Login failed too, just fail, and the backend |
714 | * will call our sbp2_remove for us */ | |
715 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
716 | return -EBUSY; | |
717 | } | |
718 | } | |
719 | ||
138c8af8 SR |
720 | sbp2_set_busy_timeout(lu); |
721 | sbp2_agent_reset(lu, 1); | |
722 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 723 | |
e8ca5668 SR |
724 | /* Complete any pending commands with busy (so they get retried) |
725 | * and remove them from our queue. */ | |
138c8af8 | 726 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 | 727 | |
4fc383c0 SR |
728 | /* Accept new commands unless there was another bus reset in the |
729 | * meantime. */ | |
138c8af8 SR |
730 | if (hpsb_node_entry_valid(lu->ne)) { |
731 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
732 | scsi_unblock_requests(lu->shost); | |
4fc383c0 | 733 | } |
1da177e4 LT |
734 | return 0; |
735 | } | |
736 | ||
138c8af8 | 737 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
1da177e4 | 738 | { |
ca0c7453 | 739 | struct sbp2_fwhost_info *hi; |
138c8af8 SR |
740 | struct Scsi_Host *shost = NULL; |
741 | struct sbp2_lu *lu = NULL; | |
261b5f66 | 742 | unsigned long flags; |
1da177e4 | 743 | |
138c8af8 SR |
744 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
745 | if (!lu) { | |
746 | SBP2_ERR("failed to create lu"); | |
1da177e4 LT |
747 | goto failed_alloc; |
748 | } | |
1da177e4 | 749 | |
138c8af8 SR |
750 | lu->ne = ud->ne; |
751 | lu->ud = ud; | |
752 | lu->speed_code = IEEE1394_SPEED_100; | |
753 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
754 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; | |
755 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); | |
756 | INIT_LIST_HEAD(&lu->cmd_orb_completed); | |
757 | INIT_LIST_HEAD(&lu->lu_list); | |
758 | spin_lock_init(&lu->cmd_orb_lock); | |
759 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
760 | INIT_WORK(&lu->protocol_work, NULL); | |
1da177e4 | 761 | |
138c8af8 | 762 | ud->device.driver_data = lu; |
1da177e4 LT |
763 | |
764 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
765 | if (!hi) { | |
138c8af8 SR |
766 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
767 | sizeof(*hi)); | |
1da177e4 LT |
768 | if (!hi) { |
769 | SBP2_ERR("failed to allocate hostinfo"); | |
770 | goto failed_alloc; | |
771 | } | |
1da177e4 | 772 | hi->host = ud->ne->host; |
138c8af8 | 773 | INIT_LIST_HEAD(&hi->logical_units); |
1da177e4 | 774 | |
1da177e4 LT |
775 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
776 | /* Handle data movement if physical dma is not | |
55664051 SR |
777 | * enabled or not supported on host controller */ |
778 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
779 | &sbp2_physdma_ops, | |
780 | 0x0ULL, 0xfffffffcULL)) { | |
781 | SBP2_ERR("failed to register lower 4GB address range"); | |
782 | goto failed_alloc; | |
783 | } | |
1da177e4 LT |
784 | #endif |
785 | } | |
786 | ||
147830f2 SR |
787 | /* Prevent unloading of the 1394 host */ |
788 | if (!try_module_get(hi->host->driver->owner)) { | |
789 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
790 | goto failed_alloc; | |
791 | } | |
792 | ||
138c8af8 | 793 | lu->hi = hi; |
1da177e4 | 794 | |
261b5f66 | 795 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 796 | list_add_tail(&lu->lu_list, &hi->logical_units); |
261b5f66 | 797 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 798 | |
35bdddb8 SR |
799 | /* Register the status FIFO address range. We could use the same FIFO |
800 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
801 | * target in order to support multi-unit devices. |
802 | * The FIFO is located out of the local host controller's physical range | |
803 | * but, if possible, within the posted write area. Status writes will | |
804 | * then be performed as unified transactions. This slightly reduces | |
805 | * bandwidth usage, and some Prolific based devices seem to require it. | |
806 | */ | |
138c8af8 | 807 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
35bdddb8 SR |
808 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
809 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 810 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
138c8af8 | 811 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
812 | SBP2_ERR("failed to allocate status FIFO address range"); |
813 | goto failed_alloc; | |
814 | } | |
815 | ||
138c8af8 SR |
816 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
817 | if (!shost) { | |
1da177e4 LT |
818 | SBP2_ERR("failed to register scsi host"); |
819 | goto failed_alloc; | |
820 | } | |
821 | ||
138c8af8 | 822 | shost->hostdata[0] = (unsigned long)lu; |
1da177e4 | 823 | |
138c8af8 SR |
824 | if (!scsi_add_host(shost, &ud->device)) { |
825 | lu->shost = shost; | |
826 | return lu; | |
1da177e4 LT |
827 | } |
828 | ||
829 | SBP2_ERR("failed to add scsi host"); | |
138c8af8 | 830 | scsi_host_put(shost); |
1da177e4 LT |
831 | |
832 | failed_alloc: | |
138c8af8 | 833 | sbp2_remove_device(lu); |
1da177e4 LT |
834 | return NULL; |
835 | } | |
836 | ||
1da177e4 LT |
837 | static void sbp2_host_reset(struct hpsb_host *host) |
838 | { | |
ca0c7453 | 839 | struct sbp2_fwhost_info *hi; |
138c8af8 | 840 | struct sbp2_lu *lu; |
261b5f66 | 841 | unsigned long flags; |
1da177e4 LT |
842 | |
843 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
844 | if (!hi) |
845 | return; | |
261b5f66 SR |
846 | |
847 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); | |
138c8af8 SR |
848 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
849 | if (likely(atomic_read(&lu->state) != | |
2cccbb55 | 850 | SBP2LU_STATE_IN_SHUTDOWN)) { |
138c8af8 SR |
851 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
852 | scsi_block_requests(lu->shost); | |
09ee67ab | 853 | } |
261b5f66 | 854 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 LT |
855 | } |
856 | ||
138c8af8 | 857 | static int sbp2_start_device(struct sbp2_lu *lu) |
1da177e4 | 858 | { |
138c8af8 | 859 | struct sbp2_fwhost_info *hi = lu->hi; |
146f7262 | 860 | int error; |
1da177e4 | 861 | |
97d552e3 | 862 | lu->login_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 863 | sizeof(struct sbp2_login_response), |
9b7d9c09 | 864 | &lu->login_response_dma, GFP_KERNEL); |
138c8af8 | 865 | if (!lu->login_response) |
1da177e4 | 866 | goto alloc_fail; |
1da177e4 | 867 | |
97d552e3 | 868 | lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 869 | sizeof(struct sbp2_query_logins_orb), |
9b7d9c09 | 870 | &lu->query_logins_orb_dma, GFP_KERNEL); |
138c8af8 | 871 | if (!lu->query_logins_orb) |
1da177e4 | 872 | goto alloc_fail; |
1da177e4 | 873 | |
97d552e3 | 874 | lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 875 | sizeof(struct sbp2_query_logins_response), |
9b7d9c09 | 876 | &lu->query_logins_response_dma, GFP_KERNEL); |
138c8af8 | 877 | if (!lu->query_logins_response) |
1da177e4 | 878 | goto alloc_fail; |
1da177e4 | 879 | |
97d552e3 | 880 | lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 881 | sizeof(struct sbp2_reconnect_orb), |
9b7d9c09 | 882 | &lu->reconnect_orb_dma, GFP_KERNEL); |
138c8af8 | 883 | if (!lu->reconnect_orb) |
1da177e4 | 884 | goto alloc_fail; |
1da177e4 | 885 | |
97d552e3 | 886 | lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 887 | sizeof(struct sbp2_logout_orb), |
9b7d9c09 | 888 | &lu->logout_orb_dma, GFP_KERNEL); |
138c8af8 | 889 | if (!lu->logout_orb) |
1da177e4 | 890 | goto alloc_fail; |
1da177e4 | 891 | |
97d552e3 | 892 | lu->login_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 893 | sizeof(struct sbp2_login_orb), |
9b7d9c09 | 894 | &lu->login_orb_dma, GFP_KERNEL); |
138c8af8 | 895 | if (!lu->login_orb) |
eaceec7f | 896 | goto alloc_fail; |
1da177e4 | 897 | |
3d269cb5 SR |
898 | if (sbp2util_create_command_orb_pool(lu)) |
899 | goto alloc_fail; | |
1da177e4 | 900 | |
e8ca5668 SR |
901 | /* Wait a second before trying to log in. Previously logged in |
902 | * initiators need a chance to reconnect. */ | |
902abed1 | 903 | if (msleep_interruptible(1000)) { |
138c8af8 | 904 | sbp2_remove_device(lu); |
1da177e4 LT |
905 | return -EINTR; |
906 | } | |
a237f35f | 907 | |
138c8af8 SR |
908 | if (sbp2_login_device(lu)) { |
909 | sbp2_remove_device(lu); | |
1da177e4 LT |
910 | return -EBUSY; |
911 | } | |
912 | ||
138c8af8 SR |
913 | sbp2_set_busy_timeout(lu); |
914 | sbp2_agent_reset(lu, 1); | |
915 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 916 | |
138c8af8 | 917 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
146f7262 | 918 | if (error) { |
1da177e4 | 919 | SBP2_ERR("scsi_add_device failed"); |
138c8af8 SR |
920 | sbp2_logout_device(lu); |
921 | sbp2_remove_device(lu); | |
146f7262 | 922 | return error; |
1da177e4 LT |
923 | } |
924 | ||
925 | return 0; | |
eaceec7f SR |
926 | |
927 | alloc_fail: | |
138c8af8 SR |
928 | SBP2_ERR("Could not allocate memory for lu"); |
929 | sbp2_remove_device(lu); | |
eaceec7f | 930 | return -ENOMEM; |
1da177e4 LT |
931 | } |
932 | ||
138c8af8 | 933 | static void sbp2_remove_device(struct sbp2_lu *lu) |
1da177e4 | 934 | { |
ca0c7453 | 935 | struct sbp2_fwhost_info *hi; |
261b5f66 | 936 | unsigned long flags; |
1da177e4 | 937 | |
138c8af8 | 938 | if (!lu) |
1da177e4 | 939 | return; |
138c8af8 | 940 | hi = lu->hi; |
a2ee3f9b SR |
941 | if (!hi) |
942 | goto no_hi; | |
1da177e4 | 943 | |
138c8af8 SR |
944 | if (lu->shost) { |
945 | scsi_remove_host(lu->shost); | |
946 | scsi_host_put(lu->shost); | |
1da177e4 | 947 | } |
09ee67ab | 948 | flush_scheduled_work(); |
a2ee3f9b | 949 | sbp2util_remove_command_orb_pool(lu, hi->host); |
1da177e4 | 950 | |
261b5f66 | 951 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 952 | list_del(&lu->lu_list); |
261b5f66 | 953 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 954 | |
138c8af8 | 955 | if (lu->login_response) |
97d552e3 | 956 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 957 | sizeof(struct sbp2_login_response), |
138c8af8 SR |
958 | lu->login_response, |
959 | lu->login_response_dma); | |
960 | if (lu->login_orb) | |
97d552e3 | 961 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 962 | sizeof(struct sbp2_login_orb), |
138c8af8 SR |
963 | lu->login_orb, |
964 | lu->login_orb_dma); | |
965 | if (lu->reconnect_orb) | |
97d552e3 | 966 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 967 | sizeof(struct sbp2_reconnect_orb), |
138c8af8 SR |
968 | lu->reconnect_orb, |
969 | lu->reconnect_orb_dma); | |
970 | if (lu->logout_orb) | |
97d552e3 | 971 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 972 | sizeof(struct sbp2_logout_orb), |
138c8af8 SR |
973 | lu->logout_orb, |
974 | lu->logout_orb_dma); | |
975 | if (lu->query_logins_orb) | |
97d552e3 | 976 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 977 | sizeof(struct sbp2_query_logins_orb), |
138c8af8 SR |
978 | lu->query_logins_orb, |
979 | lu->query_logins_orb_dma); | |
980 | if (lu->query_logins_response) | |
97d552e3 | 981 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 982 | sizeof(struct sbp2_query_logins_response), |
138c8af8 SR |
983 | lu->query_logins_response, |
984 | lu->query_logins_response_dma); | |
1da177e4 | 985 | |
138c8af8 | 986 | if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 987 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
138c8af8 | 988 | lu->status_fifo_addr); |
35bdddb8 | 989 | |
138c8af8 | 990 | lu->ud->device.driver_data = NULL; |
1da177e4 | 991 | |
a2ee3f9b SR |
992 | module_put(hi->host->driver->owner); |
993 | no_hi: | |
138c8af8 | 994 | kfree(lu); |
1da177e4 LT |
995 | } |
996 | ||
997 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
998 | /* | |
e8ca5668 SR |
999 | * Deal with write requests on adapters which do not support physical DMA or |
1000 | * have it switched off. | |
1da177e4 | 1001 | */ |
a237f35f SR |
1002 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1003 | int destid, quadlet_t *data, u64 addr, | |
1004 | size_t length, u16 flags) | |
1da177e4 | 1005 | { |
a237f35f | 1006 | memcpy(bus_to_virt((u32) addr), data, length); |
a237f35f | 1007 | return RCODE_COMPLETE; |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | /* | |
e8ca5668 SR |
1011 | * Deal with read requests on adapters which do not support physical DMA or |
1012 | * have it switched off. | |
1da177e4 | 1013 | */ |
a237f35f SR |
1014 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1015 | quadlet_t *data, u64 addr, size_t length, | |
1016 | u16 flags) | |
1da177e4 | 1017 | { |
a237f35f | 1018 | memcpy(data, bus_to_virt((u32) addr), length); |
a237f35f | 1019 | return RCODE_COMPLETE; |
1da177e4 LT |
1020 | } |
1021 | #endif | |
1022 | ||
1da177e4 LT |
1023 | /************************************** |
1024 | * SBP-2 protocol related section | |
1025 | **************************************/ | |
1026 | ||
138c8af8 | 1027 | static int sbp2_query_logins(struct sbp2_lu *lu) |
1da177e4 | 1028 | { |
138c8af8 | 1029 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1030 | quadlet_t data[2]; |
1031 | int max_logins; | |
1032 | int active_logins; | |
1033 | ||
138c8af8 SR |
1034 | lu->query_logins_orb->reserved1 = 0x0; |
1035 | lu->query_logins_orb->reserved2 = 0x0; | |
1da177e4 | 1036 | |
138c8af8 SR |
1037 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
1038 | lu->query_logins_orb->query_response_hi = | |
1039 | ORB_SET_NODE_ID(hi->host->node_id); | |
1040 | lu->query_logins_orb->lun_misc = | |
1041 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1042 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1043 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1044 | |
138c8af8 SR |
1045 | lu->query_logins_orb->reserved_resp_length = |
1046 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( | |
1047 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1048 | |
138c8af8 SR |
1049 | lu->query_logins_orb->status_fifo_hi = |
1050 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1051 | lu->query_logins_orb->status_fifo_lo = | |
1052 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1053 | |
138c8af8 SR |
1054 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
1055 | sizeof(struct sbp2_query_logins_orb)); | |
1da177e4 | 1056 | |
138c8af8 SR |
1057 | memset(lu->query_logins_response, 0, |
1058 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1059 | |
1da177e4 | 1060 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1061 | data[1] = lu->query_logins_orb_dma; |
1da177e4 LT |
1062 | sbp2util_cpu_to_be32_buffer(data, 8); |
1063 | ||
138c8af8 | 1064 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1065 | |
138c8af8 | 1066 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
1da177e4 | 1067 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1068 | return -EIO; |
1da177e4 LT |
1069 | } |
1070 | ||
138c8af8 | 1071 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
1da177e4 | 1072 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1073 | return -EIO; |
1da177e4 LT |
1074 | } |
1075 | ||
138c8af8 | 1076 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1077 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
a237f35f | 1078 | return -EIO; |
1da177e4 LT |
1079 | } |
1080 | ||
138c8af8 SR |
1081 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
1082 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1083 | |
138c8af8 SR |
1084 | max_logins = RESPONSE_GET_MAX_LOGINS( |
1085 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1086 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 | 1087 | |
138c8af8 SR |
1088 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
1089 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1090 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1091 | |
1092 | if (active_logins >= max_logins) { | |
a237f35f | 1093 | return -EIO; |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
138c8af8 | 1099 | static int sbp2_login_device(struct sbp2_lu *lu) |
1da177e4 | 1100 | { |
138c8af8 | 1101 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1102 | quadlet_t data[2]; |
1103 | ||
138c8af8 | 1104 | if (!lu->login_orb) |
a237f35f | 1105 | return -EIO; |
1da177e4 | 1106 | |
138c8af8 | 1107 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
ca0c7453 SR |
1108 | SBP2_INFO("Device does not support any more concurrent logins"); |
1109 | return -EIO; | |
1da177e4 LT |
1110 | } |
1111 | ||
e8ca5668 | 1112 | /* assume no password */ |
138c8af8 SR |
1113 | lu->login_orb->password_hi = 0; |
1114 | lu->login_orb->password_lo = 0; | |
1da177e4 | 1115 | |
138c8af8 SR |
1116 | lu->login_orb->login_response_lo = lu->login_response_dma; |
1117 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1118 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
e8ca5668 SR |
1119 | |
1120 | /* one second reconnect time */ | |
138c8af8 SR |
1121 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
1122 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); | |
1123 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1124 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1125 | |
138c8af8 | 1126 | lu->login_orb->passwd_resp_lengths = |
1da177e4 | 1127 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
1da177e4 | 1128 | |
138c8af8 SR |
1129 | lu->login_orb->status_fifo_hi = |
1130 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1131 | lu->login_orb->status_fifo_lo = | |
1132 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1133 | |
138c8af8 SR |
1134 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
1135 | sizeof(struct sbp2_login_orb)); | |
1da177e4 | 1136 | |
138c8af8 | 1137 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1138 | |
1da177e4 | 1139 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1140 | data[1] = lu->login_orb_dma; |
1da177e4 LT |
1141 | sbp2util_cpu_to_be32_buffer(data, 8); |
1142 | ||
138c8af8 | 1143 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1144 | |
e8ca5668 | 1145 | /* wait up to 20 seconds for login status */ |
138c8af8 | 1146 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
e8398bb7 | 1147 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1148 | return -EIO; |
1da177e4 LT |
1149 | } |
1150 | ||
e8ca5668 | 1151 | /* make sure that the returned status matches the login ORB */ |
138c8af8 | 1152 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
6065772d | 1153 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1154 | return -EIO; |
1da177e4 LT |
1155 | } |
1156 | ||
138c8af8 | 1157 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1158 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
a237f35f | 1159 | return -EIO; |
1da177e4 LT |
1160 | } |
1161 | ||
138c8af8 SR |
1162 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
1163 | sizeof(struct sbp2_login_response)); | |
1164 | lu->command_block_agent_addr = | |
1165 | ((u64)lu->login_response->command_block_agent_hi) << 32; | |
1166 | lu->command_block_agent_addr |= | |
1167 | ((u64)lu->login_response->command_block_agent_lo); | |
1168 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1da177e4 LT |
1169 | |
1170 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1171 | return 0; |
1da177e4 LT |
1172 | } |
1173 | ||
138c8af8 | 1174 | static int sbp2_logout_device(struct sbp2_lu *lu) |
1da177e4 | 1175 | { |
138c8af8 | 1176 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1177 | quadlet_t data[2]; |
1178 | int error; | |
1179 | ||
138c8af8 SR |
1180 | lu->logout_orb->reserved1 = 0x0; |
1181 | lu->logout_orb->reserved2 = 0x0; | |
1182 | lu->logout_orb->reserved3 = 0x0; | |
1183 | lu->logout_orb->reserved4 = 0x0; | |
1da177e4 | 1184 | |
138c8af8 SR |
1185 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
1186 | lu->logout_orb->login_ID_misc |= | |
1187 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1188 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1189 | |
138c8af8 SR |
1190 | lu->logout_orb->reserved5 = 0x0; |
1191 | lu->logout_orb->status_fifo_hi = | |
1192 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1193 | lu->logout_orb->status_fifo_lo = | |
1194 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1195 | |
138c8af8 SR |
1196 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
1197 | sizeof(struct sbp2_logout_orb)); | |
1da177e4 | 1198 | |
1da177e4 | 1199 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1200 | data[1] = lu->logout_orb_dma; |
1da177e4 LT |
1201 | sbp2util_cpu_to_be32_buffer(data, 8); |
1202 | ||
138c8af8 | 1203 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1204 | if (error) |
1205 | return error; | |
1206 | ||
e8ca5668 | 1207 | /* wait up to 1 second for the device to complete logout */ |
138c8af8 | 1208 | if (sbp2util_access_timeout(lu, HZ)) |
1da177e4 LT |
1209 | return -EIO; |
1210 | ||
1211 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1212 | return 0; |
1da177e4 LT |
1213 | } |
1214 | ||
138c8af8 | 1215 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
1da177e4 | 1216 | { |
138c8af8 | 1217 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1218 | quadlet_t data[2]; |
1219 | int error; | |
1220 | ||
138c8af8 SR |
1221 | lu->reconnect_orb->reserved1 = 0x0; |
1222 | lu->reconnect_orb->reserved2 = 0x0; | |
1223 | lu->reconnect_orb->reserved3 = 0x0; | |
1224 | lu->reconnect_orb->reserved4 = 0x0; | |
1da177e4 | 1225 | |
138c8af8 SR |
1226 | lu->reconnect_orb->login_ID_misc = |
1227 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1228 | lu->reconnect_orb->login_ID_misc |= | |
1229 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1230 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1231 | |
138c8af8 SR |
1232 | lu->reconnect_orb->reserved5 = 0x0; |
1233 | lu->reconnect_orb->status_fifo_hi = | |
1234 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1235 | lu->reconnect_orb->status_fifo_lo = | |
1236 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1237 | |
138c8af8 SR |
1238 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
1239 | sizeof(struct sbp2_reconnect_orb)); | |
1da177e4 | 1240 | |
1da177e4 | 1241 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1242 | data[1] = lu->reconnect_orb_dma; |
1da177e4 LT |
1243 | sbp2util_cpu_to_be32_buffer(data, 8); |
1244 | ||
138c8af8 | 1245 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1246 | if (error) |
1247 | return error; | |
1248 | ||
e8ca5668 | 1249 | /* wait up to 1 second for reconnect status */ |
138c8af8 | 1250 | if (sbp2util_access_timeout(lu, HZ)) { |
e8398bb7 | 1251 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1252 | return -EIO; |
1da177e4 LT |
1253 | } |
1254 | ||
e8ca5668 | 1255 | /* make sure that the returned status matches the reconnect ORB */ |
138c8af8 | 1256 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
6065772d | 1257 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1258 | return -EIO; |
1da177e4 LT |
1259 | } |
1260 | ||
138c8af8 | 1261 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1262 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
a237f35f | 1263 | return -EIO; |
1da177e4 LT |
1264 | } |
1265 | ||
35644090 | 1266 | SBP2_INFO("Reconnected to SBP-2 device"); |
a237f35f | 1267 | return 0; |
1da177e4 LT |
1268 | } |
1269 | ||
1270 | /* | |
e8ca5668 SR |
1271 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
1272 | * behaviour if our node is too busy to accept requests. | |
1da177e4 | 1273 | */ |
138c8af8 | 1274 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
1da177e4 LT |
1275 | { |
1276 | quadlet_t data; | |
1277 | ||
1da177e4 | 1278 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
138c8af8 | 1279 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
d024ebc6 | 1280 | SBP2_ERR("%s error", __FUNCTION__); |
a237f35f | 1281 | return 0; |
1da177e4 LT |
1282 | } |
1283 | ||
138c8af8 | 1284 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
1da177e4 LT |
1285 | struct unit_directory *ud) |
1286 | { | |
1287 | struct csr1212_keyval *kv; | |
1288 | struct csr1212_dentry *dentry; | |
1289 | u64 management_agent_addr; | |
9117c6dc | 1290 | u32 unit_characteristics, firmware_revision; |
24d3bf88 | 1291 | unsigned workarounds; |
1da177e4 LT |
1292 | int i; |
1293 | ||
9117c6dc SR |
1294 | management_agent_addr = 0; |
1295 | unit_characteristics = 0; | |
1296 | firmware_revision = 0; | |
1da177e4 | 1297 | |
1da177e4 LT |
1298 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
1299 | switch (kv->key.id) { | |
1300 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
edf1fb21 | 1301 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
1da177e4 | 1302 | management_agent_addr = |
a237f35f SR |
1303 | CSR1212_REGISTER_SPACE_BASE + |
1304 | (kv->value.csr_offset << 2); | |
1da177e4 | 1305 | |
edf1fb21 | 1306 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
138c8af8 | 1307 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
1da177e4 LT |
1308 | break; |
1309 | ||
1da177e4 | 1310 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
e8ca5668 SR |
1311 | /* FIXME: This is ignored so far. |
1312 | * See SBP-2 clause 7.4.8. */ | |
1da177e4 | 1313 | unit_characteristics = kv->value.immediate; |
1da177e4 LT |
1314 | break; |
1315 | ||
1316 | case SBP2_FIRMWARE_REVISION_KEY: | |
1da177e4 | 1317 | firmware_revision = kv->value.immediate; |
1da177e4 LT |
1318 | break; |
1319 | ||
1320 | default: | |
e8ca5668 SR |
1321 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
1322 | * Its "ordered" bit has consequences for command ORB | |
1323 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ | |
1da177e4 LT |
1324 | break; |
1325 | } | |
1326 | } | |
1327 | ||
24d3bf88 | 1328 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1329 | |
679c0cd2 SR |
1330 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1331 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
4618fd30 SR |
1332 | if (sbp2_workarounds_table[i].firmware_revision != |
1333 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1334 | sbp2_workarounds_table[i].firmware_revision != |
1335 | (firmware_revision & 0xffff00)) | |
1336 | continue; | |
4618fd30 SR |
1337 | if (sbp2_workarounds_table[i].model_id != |
1338 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1339 | sbp2_workarounds_table[i].model_id != ud->model_id) |
1340 | continue; | |
1341 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1342 | break; | |
1343 | } | |
1da177e4 | 1344 | |
24d3bf88 | 1345 | if (workarounds) |
e9a1c52c SR |
1346 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1347 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1348 | " model_id 0x%06x)", | |
24d3bf88 | 1349 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1350 | workarounds, firmware_revision, |
1351 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1352 | ud->model_id); | |
24d3bf88 SR |
1353 | |
1354 | /* We would need one SCSI host template for each target to adjust | |
1355 | * max_sectors on the fly, therefore warn only. */ | |
1356 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
ca0c7453 | 1357 | (sbp2_max_sectors * 512) > (128 * 1024)) |
35644090 | 1358 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
24d3bf88 SR |
1359 | "max transfer size. WARNING: Current max_sectors " |
1360 | "setting is larger than 128KB (%d sectors)", | |
1361 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
ca0c7453 | 1362 | sbp2_max_sectors); |
24d3bf88 | 1363 | |
1da177e4 LT |
1364 | /* If this is a logical unit directory entry, process the parent |
1365 | * to get the values. */ | |
1366 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
138c8af8 SR |
1367 | struct unit_directory *parent_ud = container_of( |
1368 | ud->device.parent, struct unit_directory, device); | |
1369 | sbp2_parse_unit_directory(lu, parent_ud); | |
1da177e4 | 1370 | } else { |
138c8af8 SR |
1371 | lu->management_agent_addr = management_agent_addr; |
1372 | lu->workarounds = workarounds; | |
1da177e4 | 1373 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
138c8af8 | 1374 | lu->lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1375 | } |
1376 | } | |
1377 | ||
fd23ade8 BC |
1378 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1379 | ||
1da177e4 LT |
1380 | /* |
1381 | * This function is called in order to determine the max speed and packet | |
1382 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1383 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1384 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1385 | * device decides the actual maximum data it can transfer. We just tell it | |
1386 | * the speed that it needs to use, and the max_rec the host supports, and | |
1387 | * it takes care of the rest. | |
1388 | */ | |
138c8af8 | 1389 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
1da177e4 | 1390 | { |
138c8af8 | 1391 | struct sbp2_fwhost_info *hi = lu->hi; |
fd23ade8 | 1392 | u8 payload; |
1da177e4 | 1393 | |
138c8af8 | 1394 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
1da177e4 | 1395 | |
138c8af8 SR |
1396 | if (lu->speed_code > sbp2_max_speed) { |
1397 | lu->speed_code = sbp2_max_speed; | |
ca0c7453 SR |
1398 | SBP2_INFO("Reducing speed to %s", |
1399 | hpsb_speedto_str[sbp2_max_speed]); | |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | /* Payload size is the lesser of what our speed supports and what | |
1403 | * our host supports. */ | |
138c8af8 | 1404 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
fd23ade8 BC |
1405 | (u8) (hi->host->csr.max_rec - 1)); |
1406 | ||
1407 | /* If physical DMA is off, work around limitation in ohci1394: | |
1408 | * packet size must not exceed PAGE_SIZE */ | |
138c8af8 | 1409 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
fd23ade8 BC |
1410 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
1411 | payload) | |
1412 | payload--; | |
1da177e4 | 1413 | |
35644090 | 1414 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
138c8af8 SR |
1415 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
1416 | hpsb_speedto_str[lu->speed_code], | |
35644090 | 1417 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1418 | |
138c8af8 | 1419 | lu->max_payload_size = payload; |
a237f35f | 1420 | return 0; |
1da177e4 LT |
1421 | } |
1422 | ||
138c8af8 | 1423 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
1da177e4 LT |
1424 | { |
1425 | quadlet_t data; | |
1426 | u64 addr; | |
1427 | int retval; | |
cc078189 | 1428 | unsigned long flags; |
1da177e4 | 1429 | |
ec9b7e10 | 1430 | /* flush lu->protocol_work */ |
09ee67ab SR |
1431 | if (wait) |
1432 | flush_scheduled_work(); | |
1433 | ||
1da177e4 | 1434 | data = ntohl(SBP2_AGENT_RESET_DATA); |
138c8af8 | 1435 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
1da177e4 LT |
1436 | |
1437 | if (wait) | |
138c8af8 | 1438 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
1da177e4 | 1439 | else |
138c8af8 | 1440 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
1da177e4 LT |
1441 | |
1442 | if (retval < 0) { | |
1443 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1444 | return -EIO; | |
1445 | } | |
1446 | ||
e8ca5668 | 1447 | /* make sure that the ORB_POINTER is written on next command */ |
138c8af8 SR |
1448 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1449 | lu->last_orb = NULL; | |
1450 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1451 | |
a237f35f | 1452 | return 0; |
1da177e4 LT |
1453 | } |
1454 | ||
cf8d2c09 | 1455 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
ca0c7453 | 1456 | struct sbp2_fwhost_info *hi, |
138c8af8 | 1457 | struct sbp2_command_info *cmd, |
cf8d2c09 | 1458 | unsigned int scsi_use_sg, |
825f1df5 | 1459 | struct scatterlist *sg, |
cf8d2c09 SR |
1460 | u32 orb_direction, |
1461 | enum dma_data_direction dma_dir) | |
1462 | { | |
138c8af8 | 1463 | cmd->dma_dir = dma_dir; |
cf8d2c09 SR |
1464 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
1465 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1466 | ||
e8ca5668 | 1467 | /* special case if only one element (and less than 64KB in size) */ |
5fcf5000 | 1468 | if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
cf8d2c09 | 1469 | |
5fcf5000 | 1470 | cmd->dma_size = sg->length; |
138c8af8 | 1471 | cmd->dma_type = CMD_DMA_PAGE; |
97d552e3 | 1472 | cmd->cmd_dma = dma_map_page(hi->host->device.parent, |
825f1df5 | 1473 | sg_page(sg), sg->offset, |
138c8af8 | 1474 | cmd->dma_size, cmd->dma_dir); |
cf8d2c09 | 1475 | |
138c8af8 SR |
1476 | orb->data_descriptor_lo = cmd->cmd_dma; |
1477 | orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size); | |
cf8d2c09 SR |
1478 | |
1479 | } else { | |
1480 | struct sbp2_unrestricted_page_table *sg_element = | |
138c8af8 | 1481 | &cmd->scatter_gather_element[0]; |
cf8d2c09 SR |
1482 | u32 sg_count, sg_len; |
1483 | dma_addr_t sg_addr; | |
825f1df5 | 1484 | int i, count = dma_map_sg(hi->host->device.parent, sg, |
97d552e3 | 1485 | scsi_use_sg, dma_dir); |
cf8d2c09 | 1486 | |
138c8af8 | 1487 | cmd->dma_size = scsi_use_sg; |
825f1df5 | 1488 | cmd->sge_buffer = sg; |
cf8d2c09 SR |
1489 | |
1490 | /* use page tables (s/g) */ | |
1491 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
138c8af8 | 1492 | orb->data_descriptor_lo = cmd->sge_dma; |
cf8d2c09 | 1493 | |
e8ca5668 SR |
1494 | /* loop through and fill out our SBP-2 page tables |
1495 | * (and split up anything too large) */ | |
825f1df5 SR |
1496 | for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) { |
1497 | sg_len = sg_dma_len(sg); | |
1498 | sg_addr = sg_dma_address(sg); | |
cf8d2c09 SR |
1499 | while (sg_len) { |
1500 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1501 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1502 | sg_element[sg_count].length_segment_base_hi = | |
1503 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1504 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1505 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1506 | } else { | |
1507 | sg_element[sg_count].length_segment_base_hi = | |
1508 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1509 | sg_len = 0; | |
1510 | } | |
1511 | sg_count++; | |
1512 | } | |
1513 | } | |
1514 | ||
cf8d2c09 SR |
1515 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
1516 | ||
cf8d2c09 | 1517 | sbp2util_cpu_to_be32_buffer(sg_element, |
138c8af8 SR |
1518 | (sizeof(struct sbp2_unrestricted_page_table)) * |
1519 | sg_count); | |
cf8d2c09 SR |
1520 | } |
1521 | } | |
1522 | ||
138c8af8 SR |
1523 | static void sbp2_create_command_orb(struct sbp2_lu *lu, |
1524 | struct sbp2_command_info *cmd, | |
cf8d2c09 SR |
1525 | unchar *scsi_cmd, |
1526 | unsigned int scsi_use_sg, | |
1527 | unsigned int scsi_request_bufflen, | |
825f1df5 | 1528 | struct scatterlist *sg, |
cf8d2c09 | 1529 | enum dma_data_direction dma_dir) |
1da177e4 | 1530 | { |
138c8af8 | 1531 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 1532 | struct sbp2_command_orb *orb = &cmd->command_orb; |
cf8d2c09 | 1533 | u32 orb_direction; |
1da177e4 LT |
1534 | |
1535 | /* | |
e8ca5668 | 1536 | * Set-up our command ORB. |
1da177e4 LT |
1537 | * |
1538 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1539 | * best performance (at least with the devices I have). This means | |
1540 | * that data_size becomes the number of s/g elements, and | |
1541 | * page_size should be zero (for unrestricted). | |
1542 | */ | |
138c8af8 SR |
1543 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
1544 | orb->next_ORB_lo = 0x0; | |
1545 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); | |
1546 | orb->misc |= ORB_SET_SPEED(lu->speed_code); | |
1547 | orb->misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1548 | |
43863eba | 1549 | if (dma_dir == DMA_NONE) |
a237f35f | 1550 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1551 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1552 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1553 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1554 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba | 1555 | else { |
35644090 | 1556 | SBP2_INFO("Falling back to DMA_NONE"); |
43863eba | 1557 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
1da177e4 LT |
1558 | } |
1559 | ||
e8ca5668 | 1560 | /* set up our page table stuff */ |
1da177e4 | 1561 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
138c8af8 SR |
1562 | orb->data_descriptor_hi = 0x0; |
1563 | orb->data_descriptor_lo = 0x0; | |
1564 | orb->misc |= ORB_SET_DIRECTION(1); | |
d7dea2cf | 1565 | } else |
825f1df5 | 1566 | sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg, |
138c8af8 | 1567 | orb_direction, dma_dir); |
1da177e4 | 1568 | |
138c8af8 | 1569 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
1da177e4 | 1570 | |
138c8af8 SR |
1571 | memset(orb->cdb, 0, 12); |
1572 | memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1573 | } |
1574 | ||
138c8af8 SR |
1575 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
1576 | struct sbp2_command_info *cmd) | |
1da177e4 | 1577 | { |
138c8af8 | 1578 | struct sbp2_fwhost_info *hi = lu->hi; |
cc078189 SR |
1579 | struct sbp2_command_orb *last_orb; |
1580 | dma_addr_t last_orb_dma; | |
138c8af8 | 1581 | u64 addr = lu->command_block_agent_addr; |
cc078189 SR |
1582 | quadlet_t data[2]; |
1583 | size_t length; | |
1584 | unsigned long flags; | |
1da177e4 | 1585 | |
97d552e3 SR |
1586 | dma_sync_single_for_device(hi->host->device.parent, |
1587 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1588 | sizeof(struct sbp2_command_orb), |
1589 | DMA_TO_DEVICE); | |
97d552e3 | 1590 | dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1591 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1592 | DMA_TO_DEVICE); |
e8ca5668 SR |
1593 | |
1594 | /* check to see if there are any previous orbs to use */ | |
138c8af8 SR |
1595 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1596 | last_orb = lu->last_orb; | |
1597 | last_orb_dma = lu->last_orb_dma; | |
cc078189 | 1598 | if (!last_orb) { |
1da177e4 | 1599 | /* |
cc078189 SR |
1600 | * last_orb == NULL means: We know that the target's fetch agent |
1601 | * is not active right now. | |
1da177e4 | 1602 | */ |
cc078189 | 1603 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 | 1604 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1605 | data[1] = cmd->command_orb_dma; |
1da177e4 | 1606 | sbp2util_cpu_to_be32_buffer(data, 8); |
cc078189 | 1607 | length = 8; |
1da177e4 | 1608 | } else { |
1da177e4 | 1609 | /* |
cc078189 SR |
1610 | * last_orb != NULL means: We know that the target's fetch agent |
1611 | * is (very probably) not dead or in reset state right now. | |
1612 | * We have an ORB already sent that we can append a new one to. | |
1613 | * The target's fetch agent may or may not have read this | |
1614 | * previous ORB yet. | |
1da177e4 | 1615 | */ |
97d552e3 | 1616 | dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, |
9b7d9c09 SR |
1617 | sizeof(struct sbp2_command_orb), |
1618 | DMA_TO_DEVICE); | |
138c8af8 | 1619 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
cc078189 | 1620 | wmb(); |
1da177e4 | 1621 | /* Tells hardware that this pointer is valid */ |
cc078189 | 1622 | last_orb->next_ORB_hi = 0; |
97d552e3 SR |
1623 | dma_sync_single_for_device(hi->host->device.parent, |
1624 | last_orb_dma, | |
9b7d9c09 SR |
1625 | sizeof(struct sbp2_command_orb), |
1626 | DMA_TO_DEVICE); | |
cc078189 SR |
1627 | addr += SBP2_DOORBELL_OFFSET; |
1628 | data[0] = 0; | |
1629 | length = 4; | |
1630 | } | |
138c8af8 SR |
1631 | lu->last_orb = &cmd->command_orb; |
1632 | lu->last_orb_dma = cmd->command_orb_dma; | |
1633 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1634 | |
138c8af8 | 1635 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
09ee67ab SR |
1636 | /* |
1637 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
1638 | * of transaction labels, perhaps just because there were no | |
1639 | * context switches which gave khpsbpkt a chance to collect | |
1640 | * free tlabels. Try again in non-atomic context. If necessary, | |
1641 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
1642 | * We do not accept new commands until the job is over. | |
1643 | */ | |
138c8af8 SR |
1644 | scsi_block_requests(lu->shost); |
1645 | PREPARE_WORK(&lu->protocol_work, | |
09ee67ab | 1646 | last_orb ? sbp2util_write_doorbell: |
ec9b7e10 | 1647 | sbp2util_write_orb_pointer); |
138c8af8 | 1648 | schedule_work(&lu->protocol_work); |
09ee67ab | 1649 | } |
1da177e4 LT |
1650 | } |
1651 | ||
138c8af8 | 1652 | static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
1653 | void (*done)(struct scsi_cmnd *)) |
1654 | { | |
138c8af8 | 1655 | unchar *scsi_cmd = (unchar *)SCpnt->cmnd; |
138c8af8 | 1656 | struct sbp2_command_info *cmd; |
1da177e4 | 1657 | |
138c8af8 SR |
1658 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
1659 | if (!cmd) | |
a237f35f | 1660 | return -EIO; |
1da177e4 | 1661 | |
d7dea2cf | 1662 | sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt), |
825f1df5 | 1663 | scsi_bufflen(SCpnt), scsi_sglist(SCpnt), |
1da177e4 | 1664 | SCpnt->sc_data_direction); |
138c8af8 | 1665 | sbp2_link_orb_command(lu, cmd); |
1da177e4 | 1666 | |
a237f35f | 1667 | return 0; |
1da177e4 LT |
1668 | } |
1669 | ||
1da177e4 LT |
1670 | /* |
1671 | * Translates SBP-2 status into SCSI sense data for check conditions | |
1672 | */ | |
138c8af8 SR |
1673 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
1674 | unchar *sense_data) | |
1da177e4 | 1675 | { |
e8ca5668 | 1676 | /* OK, it's pretty ugly... ;-) */ |
1da177e4 LT |
1677 | sense_data[0] = 0x70; |
1678 | sense_data[1] = 0x0; | |
1679 | sense_data[2] = sbp2_status[9]; | |
1680 | sense_data[3] = sbp2_status[12]; | |
1681 | sense_data[4] = sbp2_status[13]; | |
1682 | sense_data[5] = sbp2_status[14]; | |
1683 | sense_data[6] = sbp2_status[15]; | |
1684 | sense_data[7] = 10; | |
1685 | sense_data[8] = sbp2_status[16]; | |
1686 | sense_data[9] = sbp2_status[17]; | |
1687 | sense_data[10] = sbp2_status[18]; | |
1688 | sense_data[11] = sbp2_status[19]; | |
1689 | sense_data[12] = sbp2_status[10]; | |
1690 | sense_data[13] = sbp2_status[11]; | |
1691 | sense_data[14] = sbp2_status[20]; | |
1692 | sense_data[15] = sbp2_status[21]; | |
1693 | ||
e8ca5668 | 1694 | return sbp2_status[8] & 0x3f; |
1da177e4 LT |
1695 | } |
1696 | ||
3e98eab4 SR |
1697 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
1698 | int destid, quadlet_t *data, u64 addr, | |
1699 | size_t length, u16 fl) | |
1da177e4 | 1700 | { |
ca0c7453 | 1701 | struct sbp2_fwhost_info *hi; |
138c8af8 | 1702 | struct sbp2_lu *lu = NULL, *lu_tmp; |
1da177e4 | 1703 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 1704 | struct sbp2_status_block *sb; |
1da177e4 | 1705 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
138c8af8 | 1706 | struct sbp2_command_info *cmd; |
79456197 | 1707 | unsigned long flags; |
1da177e4 | 1708 | |
6065772d SR |
1709 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
1710 | SBP2_ERR("Wrong size of status block"); | |
1711 | return RCODE_ADDRESS_ERROR; | |
1712 | } | |
1713 | if (unlikely(!host)) { | |
1da177e4 | 1714 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 1715 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1716 | } |
1da177e4 | 1717 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 1718 | if (unlikely(!hi)) { |
1da177e4 | 1719 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 1720 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1721 | } |
e8ca5668 SR |
1722 | |
1723 | /* Find the unit which wrote the status. */ | |
261b5f66 | 1724 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 SR |
1725 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
1726 | if (lu_tmp->ne->nodeid == nodeid && | |
1727 | lu_tmp->status_fifo_addr == addr) { | |
1728 | lu = lu_tmp; | |
1da177e4 LT |
1729 | break; |
1730 | } | |
1731 | } | |
261b5f66 SR |
1732 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1733 | ||
138c8af8 SR |
1734 | if (unlikely(!lu)) { |
1735 | SBP2_ERR("lu is NULL - device is gone?"); | |
a237f35f | 1736 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
1737 | } |
1738 | ||
138c8af8 | 1739 | /* Put response into lu status fifo buffer. The first two bytes |
3e98eab4 SR |
1740 | * come in big endian bit order. Often the target writes only a |
1741 | * truncated status block, minimally the first two quadlets. The rest | |
e8ca5668 | 1742 | * is implied to be zeros. */ |
138c8af8 | 1743 | sb = &lu->status_block; |
3e98eab4 SR |
1744 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
1745 | memcpy(sb, data, length); | |
1746 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 | 1747 | |
e8ca5668 | 1748 | /* Ignore unsolicited status. Handle command ORB status. */ |
6065772d | 1749 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
138c8af8 | 1750 | cmd = NULL; |
6065772d | 1751 | else |
138c8af8 SR |
1752 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
1753 | if (cmd) { | |
97d552e3 SR |
1754 | dma_sync_single_for_cpu(hi->host->device.parent, |
1755 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1756 | sizeof(struct sbp2_command_orb), |
1757 | DMA_TO_DEVICE); | |
97d552e3 | 1758 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1759 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1760 | DMA_TO_DEVICE); |
e8ca5668 | 1761 | /* Grab SCSI command pointers and check status. */ |
6065772d SR |
1762 | /* |
1763 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
1764 | * not be reused until status for a subsequent ORB is received. | |
1765 | */ | |
138c8af8 SR |
1766 | SCpnt = cmd->Current_SCpnt; |
1767 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); | |
1768 | sbp2util_mark_command_completed(lu, cmd); | |
1769 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1770 | |
1771 | if (SCpnt) { | |
abbca103 SR |
1772 | u32 h = sb->ORB_offset_hi_misc; |
1773 | u32 r = STATUS_GET_RESP(h); | |
1774 | ||
1775 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
35644090 | 1776 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
abbca103 | 1777 | r, STATUS_GET_SBP_STATUS(h)); |
6065772d | 1778 | scsi_status = |
abbca103 SR |
1779 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
1780 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 1781 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 1782 | } |
e8ca5668 | 1783 | |
edf1fb21 | 1784 | if (STATUS_GET_LEN(h) > 1) |
3e98eab4 SR |
1785 | scsi_status = sbp2_status_to_sense_data( |
1786 | (unchar *)sb, SCpnt->sense_buffer); | |
e8ca5668 | 1787 | |
edf1fb21 | 1788 | if (STATUS_TEST_DEAD(h)) |
138c8af8 | 1789 | sbp2_agent_reset(lu, 0); |
1da177e4 LT |
1790 | } |
1791 | ||
e8ca5668 | 1792 | /* Check here to see if there are no commands in-use. If there |
cc078189 SR |
1793 | * are none, we know that the fetch agent left the active state |
1794 | * _and_ that we did not reactivate it yet. Therefore clear | |
1795 | * last_orb so that next time we write directly to the | |
1796 | * ORB_POINTER register. That way the fetch agent does not need | |
e8ca5668 | 1797 | * to refetch the next_ORB. */ |
138c8af8 SR |
1798 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1799 | if (list_empty(&lu->cmd_orb_inuse)) | |
1800 | lu->last_orb = NULL; | |
1801 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1802 | |
1803 | } else { | |
e8ca5668 | 1804 | /* It's probably status after a management request. */ |
138c8af8 SR |
1805 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
1806 | (sb->ORB_offset_lo == lu->login_orb_dma) || | |
1807 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || | |
1808 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { | |
1809 | lu->access_complete = 1; | |
ca0c7453 | 1810 | wake_up_interruptible(&sbp2_access_wq); |
e8398bb7 | 1811 | } |
1da177e4 LT |
1812 | } |
1813 | ||
edf1fb21 | 1814 | if (SCpnt) |
138c8af8 SR |
1815 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
1816 | cmd->Current_done); | |
a237f35f | 1817 | return RCODE_COMPLETE; |
1da177e4 LT |
1818 | } |
1819 | ||
1da177e4 LT |
1820 | /************************************** |
1821 | * SCSI interface related section | |
1822 | **************************************/ | |
1823 | ||
1da177e4 LT |
1824 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
1825 | void (*done)(struct scsi_cmnd *)) | |
1826 | { | |
138c8af8 | 1827 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
ca0c7453 | 1828 | struct sbp2_fwhost_info *hi; |
abd559b1 | 1829 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 1830 | |
138c8af8 | 1831 | if (unlikely(!sbp2util_node_is_available(lu))) |
abd559b1 | 1832 | goto done; |
1da177e4 | 1833 | |
138c8af8 | 1834 | hi = lu->hi; |
1da177e4 | 1835 | |
5796aa7b | 1836 | if (unlikely(!hi)) { |
ca0c7453 | 1837 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
abd559b1 | 1838 | goto done; |
1da177e4 LT |
1839 | } |
1840 | ||
e8ca5668 SR |
1841 | /* Multiple units are currently represented to the SCSI core as separate |
1842 | * targets, not as one target with multiple LUs. Therefore return | |
1843 | * selection time-out to any IO directed at non-zero LUNs. */ | |
5796aa7b | 1844 | if (unlikely(SCpnt->device->lun)) |
abd559b1 | 1845 | goto done; |
1da177e4 | 1846 | |
138c8af8 | 1847 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
1da177e4 | 1848 | SBP2_ERR("Bus reset in progress - rejecting command"); |
abd559b1 JM |
1849 | result = DID_BUS_BUSY << 16; |
1850 | goto done; | |
1da177e4 LT |
1851 | } |
1852 | ||
e8ca5668 SR |
1853 | /* Bidirectional commands are not yet implemented, |
1854 | * and unknown transfer direction not handled. */ | |
5796aa7b | 1855 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
43863eba SR |
1856 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
1857 | result = DID_ERROR << 16; | |
1858 | goto done; | |
1859 | } | |
1860 | ||
138c8af8 | 1861 | if (sbp2_send_command(lu, SCpnt, done)) { |
1da177e4 | 1862 | SBP2_ERR("Error sending SCSI command"); |
138c8af8 SR |
1863 | sbp2scsi_complete_command(lu, |
1864 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
1da177e4 LT |
1865 | SCpnt, done); |
1866 | } | |
abd559b1 | 1867 | return 0; |
1da177e4 | 1868 | |
abd559b1 JM |
1869 | done: |
1870 | SCpnt->result = result; | |
1871 | done(SCpnt); | |
1872 | return 0; | |
1da177e4 LT |
1873 | } |
1874 | ||
138c8af8 | 1875 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
1da177e4 | 1876 | { |
138c8af8 | 1877 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 | 1878 | struct list_head *lh; |
138c8af8 | 1879 | struct sbp2_command_info *cmd; |
79456197 | 1880 | unsigned long flags; |
1da177e4 | 1881 | |
138c8af8 SR |
1882 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1883 | while (!list_empty(&lu->cmd_orb_inuse)) { | |
1884 | lh = lu->cmd_orb_inuse.next; | |
1885 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
1886 | dma_sync_single_for_cpu(hi->host->device.parent, |
1887 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1888 | sizeof(struct sbp2_command_orb), |
1889 | DMA_TO_DEVICE); | |
97d552e3 | 1890 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1891 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1892 | DMA_TO_DEVICE); |
138c8af8 SR |
1893 | sbp2util_mark_command_completed(lu, cmd); |
1894 | if (cmd->Current_SCpnt) { | |
1895 | cmd->Current_SCpnt->result = status << 16; | |
1896 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
1897 | } |
1898 | } | |
138c8af8 | 1899 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
1900 | |
1901 | return; | |
1902 | } | |
1903 | ||
1904 | /* | |
e8ca5668 | 1905 | * Complete a regular SCSI command. Can be called in atomic context. |
1da177e4 | 1906 | */ |
138c8af8 SR |
1907 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
1908 | struct scsi_cmnd *SCpnt, | |
1da177e4 LT |
1909 | void (*done)(struct scsi_cmnd *)) |
1910 | { | |
1da177e4 LT |
1911 | if (!SCpnt) { |
1912 | SBP2_ERR("SCpnt is NULL"); | |
1913 | return; | |
1914 | } | |
1915 | ||
1da177e4 | 1916 | switch (scsi_status) { |
a237f35f | 1917 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 1918 | SCpnt->result = DID_OK << 16; |
a237f35f | 1919 | break; |
1da177e4 | 1920 | |
a237f35f SR |
1921 | case SBP2_SCSI_STATUS_BUSY: |
1922 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
1923 | SCpnt->result = DID_BUS_BUSY << 16; | |
1924 | break; | |
1da177e4 | 1925 | |
a237f35f | 1926 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
8f0525ff | 1927 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
a237f35f | 1928 | break; |
1da177e4 | 1929 | |
a237f35f SR |
1930 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
1931 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
1932 | SCpnt->result = DID_NO_CONNECT << 16; | |
1933 | scsi_print_command(SCpnt); | |
1934 | break; | |
1da177e4 | 1935 | |
a237f35f SR |
1936 | case SBP2_SCSI_STATUS_CONDITION_MET: |
1937 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
1938 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
1939 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
1940 | SCpnt->result = DID_ERROR << 16; | |
1941 | scsi_print_command(SCpnt); | |
1942 | break; | |
1da177e4 | 1943 | |
a237f35f SR |
1944 | default: |
1945 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
1946 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
1947 | } |
1948 | ||
e8ca5668 SR |
1949 | /* If a bus reset is in progress and there was an error, complete |
1950 | * the command as busy so that it will get retried. */ | |
138c8af8 | 1951 | if (!hpsb_node_entry_valid(lu->ne) |
a237f35f | 1952 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
1da177e4 LT |
1953 | SBP2_ERR("Completing command with busy (bus reset)"); |
1954 | SCpnt->result = DID_BUS_BUSY << 16; | |
1955 | } | |
1956 | ||
e8ca5668 | 1957 | /* Tell the SCSI stack that we're done with this command. */ |
a237f35f | 1958 | done(SCpnt); |
1da177e4 LT |
1959 | } |
1960 | ||
abd559b1 | 1961 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 1962 | { |
138c8af8 | 1963 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
a80614d1 | 1964 | |
138c8af8 | 1965 | lu->sdev = sdev; |
c394f1ea | 1966 | sdev->allow_restart = 1; |
a80614d1 | 1967 | |
465ff318 JB |
1968 | /* |
1969 | * Update the dma alignment (minimum alignment requirements for | |
1970 | * start and end of DMA transfers) to be a sector | |
1971 | */ | |
1972 | blk_queue_update_dma_alignment(sdev->request_queue, 511); | |
1973 | ||
138c8af8 | 1974 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 1975 | sdev->inquiry_len = 36; |
abd559b1 JM |
1976 | return 0; |
1977 | } | |
1978 | ||
abd559b1 JM |
1979 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
1980 | { | |
138c8af8 | 1981 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
24d3bf88 | 1982 | |
365c786f | 1983 | sdev->use_10_for_rw = 1; |
24d3bf88 | 1984 | |
1a74bc68 SR |
1985 | if (sdev->type == TYPE_ROM) |
1986 | sdev->use_10_for_ms = 1; | |
24d3bf88 | 1987 | if (sdev->type == TYPE_DISK && |
138c8af8 | 1988 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
24d3bf88 | 1989 | sdev->skip_ms_page_8 = 1; |
138c8af8 | 1990 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
e9a1c52c | 1991 | sdev->fix_capacity = 1; |
4e6343a1 SR |
1992 | if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
1993 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); | |
1da177e4 LT |
1994 | return 0; |
1995 | } | |
1996 | ||
abd559b1 JM |
1997 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
1998 | { | |
138c8af8 | 1999 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
abd559b1 JM |
2000 | return; |
2001 | } | |
2002 | ||
1da177e4 | 2003 | /* |
e8ca5668 SR |
2004 | * Called by scsi stack when something has really gone wrong. |
2005 | * Usually called when a command has timed-out for some reason. | |
1da177e4 LT |
2006 | */ |
2007 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2008 | { | |
138c8af8 SR |
2009 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
2010 | struct sbp2_fwhost_info *hi = lu->hi; | |
2011 | struct sbp2_command_info *cmd; | |
24c7cd06 | 2012 | unsigned long flags; |
1da177e4 | 2013 | |
35644090 | 2014 | SBP2_INFO("aborting sbp2 command"); |
1da177e4 LT |
2015 | scsi_print_command(SCpnt); |
2016 | ||
138c8af8 SR |
2017 | if (sbp2util_node_is_available(lu)) { |
2018 | sbp2_agent_reset(lu, 1); | |
1da177e4 | 2019 | |
23077f1d | 2020 | /* Return a matching command structure to the free pool. */ |
138c8af8 SR |
2021 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
2022 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); | |
2023 | if (cmd) { | |
97d552e3 | 2024 | dma_sync_single_for_cpu(hi->host->device.parent, |
138c8af8 SR |
2025 | cmd->command_orb_dma, |
2026 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 2027 | DMA_TO_DEVICE); |
97d552e3 SR |
2028 | dma_sync_single_for_cpu(hi->host->device.parent, |
2029 | cmd->sge_dma, | |
138c8af8 | 2030 | sizeof(cmd->scatter_gather_element), |
2446a79f | 2031 | DMA_TO_DEVICE); |
138c8af8 SR |
2032 | sbp2util_mark_command_completed(lu, cmd); |
2033 | if (cmd->Current_SCpnt) { | |
2034 | cmd->Current_SCpnt->result = DID_ABORT << 16; | |
2035 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
2036 | } |
2037 | } | |
138c8af8 | 2038 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 | 2039 | |
138c8af8 | 2040 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 LT |
2041 | } |
2042 | ||
a237f35f | 2043 | return SUCCESS; |
1da177e4 LT |
2044 | } |
2045 | ||
2046 | /* | |
2047 | * Called by scsi stack when something has really gone wrong. | |
2048 | */ | |
abd559b1 | 2049 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 | 2050 | { |
138c8af8 | 2051 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
1da177e4 | 2052 | |
35644090 | 2053 | SBP2_INFO("reset requested"); |
1da177e4 | 2054 | |
138c8af8 | 2055 | if (sbp2util_node_is_available(lu)) { |
35644090 | 2056 | SBP2_INFO("generating sbp2 fetch agent reset"); |
138c8af8 | 2057 | sbp2_agent_reset(lu, 1); |
1da177e4 LT |
2058 | } |
2059 | ||
abd559b1 | 2060 | return SUCCESS; |
94d0e7b8 JG |
2061 | } |
2062 | ||
a237f35f SR |
2063 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2064 | struct device_attribute *attr, | |
2065 | char *buf) | |
1da177e4 LT |
2066 | { |
2067 | struct scsi_device *sdev; | |
138c8af8 | 2068 | struct sbp2_lu *lu; |
1da177e4 LT |
2069 | |
2070 | if (!(sdev = to_scsi_device(dev))) | |
2071 | return 0; | |
2072 | ||
138c8af8 | 2073 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
1da177e4 LT |
2074 | return 0; |
2075 | ||
d7794c86 SR |
2076 | if (sbp2_long_sysfs_ieee1394_id) |
2077 | return sprintf(buf, "%016Lx:%06x:%04x\n", | |
2078 | (unsigned long long)lu->ne->guid, | |
2079 | lu->ud->directory_id, ORB_SET_LUN(lu->lun)); | |
2080 | else | |
2081 | return sprintf(buf, "%016Lx:%d:%d\n", | |
2082 | (unsigned long long)lu->ne->guid, | |
2083 | lu->ud->id, ORB_SET_LUN(lu->lun)); | |
1da177e4 | 2084 | } |
1da177e4 LT |
2085 | |
2086 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2087 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2088 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2089 | MODULE_LICENSE("GPL"); | |
2090 | ||
1da177e4 LT |
2091 | static int sbp2_module_init(void) |
2092 | { | |
2093 | int ret; | |
2094 | ||
ca0c7453 SR |
2095 | if (sbp2_serialize_io) { |
2096 | sbp2_shost_template.can_queue = 1; | |
2097 | sbp2_shost_template.cmd_per_lun = 1; | |
1da177e4 LT |
2098 | } |
2099 | ||
ca0c7453 | 2100 | sbp2_shost_template.max_sectors = sbp2_max_sectors; |
1da177e4 | 2101 | |
1da177e4 | 2102 | hpsb_register_highlevel(&sbp2_highlevel); |
1da177e4 LT |
2103 | ret = hpsb_register_protocol(&sbp2_driver); |
2104 | if (ret) { | |
2105 | SBP2_ERR("Failed to register protocol"); | |
2106 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2107 | return ret; | |
2108 | } | |
1da177e4 LT |
2109 | return 0; |
2110 | } | |
2111 | ||
2112 | static void __exit sbp2_module_exit(void) | |
2113 | { | |
1da177e4 | 2114 | hpsb_unregister_protocol(&sbp2_driver); |
1da177e4 LT |
2115 | hpsb_unregister_highlevel(&sbp2_highlevel); |
2116 | } | |
2117 | ||
2118 | module_init(sbp2_module_init); | |
2119 | module_exit(sbp2_module_exit); |