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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 | ||
902abed1 SR |
54 | #include <linux/compiler.h> |
55 | #include <linux/delay.h> | |
56 | #include <linux/device.h> | |
57 | #include <linux/dma-mapping.h> | |
58 | #include <linux/gfp.h> | |
59 | #include <linux/init.h> | |
1da177e4 LT |
60 | #include <linux/kernel.h> |
61 | #include <linux/list.h> | |
f84c922b | 62 | #include <linux/mm.h> |
1da177e4 LT |
63 | #include <linux/module.h> |
64 | #include <linux/moduleparam.h> | |
f84c922b | 65 | #include <linux/sched.h> |
902abed1 SR |
66 | #include <linux/slab.h> |
67 | #include <linux/spinlock.h> | |
68 | #include <linux/stat.h> | |
69 | #include <linux/string.h> | |
70 | #include <linux/stringify.h> | |
71 | #include <linux/types.h> | |
e8398bb7 | 72 | #include <linux/wait.h> |
20e2008e | 73 | #include <linux/workqueue.h> |
87ae9afd | 74 | #include <linux/scatterlist.h> |
1da177e4 | 75 | |
1da177e4 | 76 | #include <asm/byteorder.h> |
902abed1 SR |
77 | #include <asm/errno.h> |
78 | #include <asm/param.h> | |
902abed1 SR |
79 | #include <asm/system.h> |
80 | #include <asm/types.h> | |
81 | ||
82 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
83 | #include <asm/io.h> /* for bus_to_virt */ | |
84 | #endif | |
1da177e4 LT |
85 | |
86 | #include <scsi/scsi.h> | |
87 | #include <scsi/scsi_cmnd.h> | |
88 | #include <scsi/scsi_dbg.h> | |
89 | #include <scsi/scsi_device.h> | |
90 | #include <scsi/scsi_host.h> | |
91 | ||
92 | #include "csr1212.h" | |
902abed1 SR |
93 | #include "highlevel.h" |
94 | #include "hosts.h" | |
1da177e4 | 95 | #include "ieee1394.h" |
1da177e4 | 96 | #include "ieee1394_core.h" |
902abed1 | 97 | #include "ieee1394_hotplug.h" |
1da177e4 | 98 | #include "ieee1394_transactions.h" |
902abed1 SR |
99 | #include "ieee1394_types.h" |
100 | #include "nodemgr.h" | |
1da177e4 LT |
101 | #include "sbp2.h" |
102 | ||
1da177e4 LT |
103 | /* |
104 | * Module load parameter definitions | |
105 | */ | |
106 | ||
107 | /* | |
108 | * Change max_speed on module load if you have a bad IEEE-1394 | |
109 | * controller that has trouble running 2KB packets at 400mb. | |
110 | * | |
111 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
112 | * (probably due to PCI latency/throughput issues with the part). You can | |
113 | * bump down the speed if you are running into problems. | |
114 | */ | |
ca0c7453 SR |
115 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
116 | module_param_named(max_speed, sbp2_max_speed, int, 0644); | |
28b06679 SR |
117 | MODULE_PARM_DESC(max_speed, "Force max speed " |
118 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); | |
1da177e4 LT |
119 | |
120 | /* | |
77bba7ae SR |
121 | * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs. |
122 | * This is and always has been buggy in multiple subtle ways. See above TODOs. | |
1da177e4 | 123 | */ |
ca0c7453 | 124 | static int sbp2_serialize_io = 1; |
77bba7ae SR |
125 | module_param_named(serialize_io, sbp2_serialize_io, bool, 0444); |
126 | MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers " | |
127 | "(default = Y, faster but buggy = N)"); | |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Bump up max_sectors if you'd like to support very large sized | |
131 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
132 | * transfers greater or equal to 128KB. Default is a value of 255 | |
133 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
134 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
135 | * transfer sizes. | |
136 | */ | |
ca0c7453 SR |
137 | static int sbp2_max_sectors = SBP2_MAX_SECTORS; |
138 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); | |
139 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " | |
140 | "(default = " __stringify(SBP2_MAX_SECTORS) ")"); | |
1da177e4 LT |
141 | |
142 | /* | |
143 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
144 | * do an exclusive login, as it's generally unsafe to have two hosts | |
145 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
146 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
147 | * and you're either running read-only filesystems or some sort of special | |
20f45781 BC |
148 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
149 | * File System, or Lustre, then set exclusive_login to zero. | |
150 | * | |
151 | * So far only bridges from Oxford Semiconductor are known to support | |
152 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
153 | * are possible on OXFW911 and newer Oxsemi bridges. | |
1da177e4 | 154 | */ |
ca0c7453 | 155 | static int sbp2_exclusive_login = 1; |
77bba7ae | 156 | module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644); |
ca0c7453 | 157 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
77bba7ae | 158 | "(default = Y, use N for concurrent initiators)"); |
1da177e4 LT |
159 | |
160 | /* | |
24d3bf88 SR |
161 | * If any of the following workarounds is required for your device to work, |
162 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
163 | * mailing list. | |
1da177e4 | 164 | * |
24d3bf88 SR |
165 | * - 128kB max transfer |
166 | * Limit transfer size. Necessary for some old bridges. | |
167 | * | |
168 | * - 36 byte inquiry | |
169 | * When scsi_mod probes the device, let the inquiry command look like that | |
170 | * from MS Windows. | |
171 | * | |
172 | * - skip mode page 8 | |
173 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
174 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
e9a1c52c SR |
175 | * |
176 | * - fix capacity | |
177 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
178 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
179 | * Don't use this with devices which don't have this bug. | |
679c0cd2 SR |
180 | * |
181 | * - override internal blacklist | |
182 | * Instead of adding to the built-in blacklist, use only the workarounds | |
183 | * specified in the module load parameter. | |
184 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 185 | */ |
24d3bf88 SR |
186 | static int sbp2_default_workarounds; |
187 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
188 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
189 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
190 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
191 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 192 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
679c0cd2 | 193 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
194 | ", or a combination)"); |
195 | ||
d7794c86 SR |
196 | /* |
197 | * This influences the format of the sysfs attribute | |
198 | * /sys/bus/scsi/devices/.../ieee1394_id. | |
199 | * | |
200 | * The default format is like in older kernels: %016Lx:%d:%d | |
201 | * It contains the target's EUI-64, a number given to the logical unit by | |
202 | * the ieee1394 driver's nodemgr (starting at 0), and the LUN. | |
203 | * | |
204 | * The long format is: %016Lx:%06x:%04x | |
205 | * It contains the target's EUI-64, the unit directory's directory_ID as per | |
206 | * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the | |
207 | * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI | |
208 | * Architecture Model) rev.2 to 4 annex A. Therefore and because it is | |
209 | * independent of the implementation of the ieee1394 nodemgr, the longer format | |
210 | * is recommended for future use. | |
211 | */ | |
212 | static int sbp2_long_sysfs_ieee1394_id; | |
213 | module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); | |
214 | MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " | |
215 | "(default = backwards-compatible = N, SAM-conforming = Y)"); | |
216 | ||
1da177e4 | 217 | |
edf1fb21 SR |
218 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
219 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
1da177e4 | 220 | |
1da177e4 LT |
221 | /* |
222 | * Globals | |
223 | */ | |
138c8af8 SR |
224 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
225 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, | |
ea42ea0f | 226 | void (*)(struct scsi_cmnd *)); |
138c8af8 SR |
227 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
228 | static int sbp2_start_device(struct sbp2_lu *); | |
229 | static void sbp2_remove_device(struct sbp2_lu *); | |
230 | static int sbp2_login_device(struct sbp2_lu *); | |
231 | static int sbp2_reconnect_device(struct sbp2_lu *); | |
232 | static int sbp2_logout_device(struct sbp2_lu *); | |
ea42ea0f SR |
233 | static void sbp2_host_reset(struct hpsb_host *); |
234 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, | |
235 | u64, size_t, u16); | |
138c8af8 SR |
236 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
237 | static void sbp2_parse_unit_directory(struct sbp2_lu *, | |
ea42ea0f | 238 | struct unit_directory *); |
138c8af8 SR |
239 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
240 | static int sbp2_max_speed_and_size(struct sbp2_lu *); | |
1da177e4 | 241 | |
1da177e4 LT |
242 | |
243 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
244 | ||
261b5f66 SR |
245 | static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); |
246 | ||
1da177e4 | 247 | static struct hpsb_highlevel sbp2_highlevel = { |
ea42ea0f SR |
248 | .name = SBP2_DEVICE_NAME, |
249 | .host_reset = sbp2_host_reset, | |
1da177e4 LT |
250 | }; |
251 | ||
252 | static struct hpsb_address_ops sbp2_ops = { | |
ea42ea0f | 253 | .write = sbp2_handle_status_write |
1da177e4 LT |
254 | }; |
255 | ||
256 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
ea42ea0f SR |
257 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
258 | u64, size_t, u16); | |
259 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, | |
260 | size_t, u16); | |
261 | ||
1da177e4 | 262 | static struct hpsb_address_ops sbp2_physdma_ops = { |
ea42ea0f SR |
263 | .read = sbp2_handle_physdma_read, |
264 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
265 | }; |
266 | #endif | |
267 | ||
ea42ea0f SR |
268 | |
269 | /* | |
270 | * Interface to driver core and IEEE 1394 core | |
271 | */ | |
272 | static struct ieee1394_device_id sbp2_id_table[] = { | |
273 | { | |
274 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, | |
275 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
276 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
277 | {} | |
278 | }; | |
279 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
280 | ||
281 | static int sbp2_probe(struct device *); | |
282 | static int sbp2_remove(struct device *); | |
283 | static int sbp2_update(struct unit_directory *); | |
284 | ||
1da177e4 | 285 | static struct hpsb_protocol_driver sbp2_driver = { |
ed30c26e | 286 | .name = SBP2_DEVICE_NAME, |
1da177e4 LT |
287 | .id_table = sbp2_id_table, |
288 | .update = sbp2_update, | |
289 | .driver = { | |
1da177e4 LT |
290 | .probe = sbp2_probe, |
291 | .remove = sbp2_remove, | |
292 | }, | |
293 | }; | |
294 | ||
ea42ea0f SR |
295 | |
296 | /* | |
297 | * Interface to SCSI core | |
298 | */ | |
299 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, | |
300 | void (*)(struct scsi_cmnd *)); | |
301 | static int sbp2scsi_abort(struct scsi_cmnd *); | |
302 | static int sbp2scsi_reset(struct scsi_cmnd *); | |
303 | static int sbp2scsi_slave_alloc(struct scsi_device *); | |
304 | static int sbp2scsi_slave_configure(struct scsi_device *); | |
305 | static void sbp2scsi_slave_destroy(struct scsi_device *); | |
306 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, | |
307 | struct device_attribute *, char *); | |
308 | ||
309 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
310 | ||
311 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
312 | &dev_attr_ieee1394_id, | |
313 | NULL | |
314 | }; | |
315 | ||
ca0c7453 | 316 | static struct scsi_host_template sbp2_shost_template = { |
ea42ea0f SR |
317 | .module = THIS_MODULE, |
318 | .name = "SBP-2 IEEE-1394", | |
319 | .proc_name = SBP2_DEVICE_NAME, | |
320 | .queuecommand = sbp2scsi_queuecommand, | |
321 | .eh_abort_handler = sbp2scsi_abort, | |
322 | .eh_device_reset_handler = sbp2scsi_reset, | |
323 | .slave_alloc = sbp2scsi_slave_alloc, | |
324 | .slave_configure = sbp2scsi_slave_configure, | |
325 | .slave_destroy = sbp2scsi_slave_destroy, | |
326 | .this_id = -1, | |
327 | .sg_tablesize = SG_ALL, | |
328 | .use_clustering = ENABLE_CLUSTERING, | |
329 | .cmd_per_lun = SBP2_MAX_CMDS, | |
330 | .can_queue = SBP2_MAX_CMDS, | |
ea42ea0f SR |
331 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
332 | }; | |
333 | ||
4618fd30 SR |
334 | /* for match-all entries in sbp2_workarounds_table */ |
335 | #define SBP2_ROM_VALUE_WILDCARD 0x1000000 | |
ea42ea0f | 336 | |
a80614d1 | 337 | /* |
24d3bf88 SR |
338 | * List of devices with known bugs. |
339 | * | |
340 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
341 | * for the type of bridge chip of a device. It yields a few false positives | |
342 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 343 | */ |
24d3bf88 SR |
344 | static const struct { |
345 | u32 firmware_revision; | |
e9a1c52c | 346 | u32 model_id; |
24d3bf88 SR |
347 | unsigned workarounds; |
348 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 349 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 350 | .firmware_revision = 0x002800, |
4b9a3347 | 351 | .model_id = 0x001010, |
24d3bf88 SR |
352 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
353 | SBP2_WORKAROUND_MODE_SENSE_8, | |
354 | }, | |
355 | /* Initio bridges, actually only needed for some older ones */ { | |
356 | .firmware_revision = 0x000200, | |
4618fd30 | 357 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 SR |
358 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
359 | }, | |
360 | /* Symbios bridge */ { | |
361 | .firmware_revision = 0xa0b800, | |
4618fd30 | 362 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 | 363 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
e9a1c52c | 364 | }, |
e9a1c52c SR |
365 | /* iPod 4th generation */ { |
366 | .firmware_revision = 0x0a2700, | |
367 | .model_id = 0x000021, | |
368 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
369 | }, | |
370 | /* iPod mini */ { | |
371 | .firmware_revision = 0x0a2700, | |
372 | .model_id = 0x000023, | |
373 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
374 | }, | |
375 | /* iPod Photo */ { | |
376 | .firmware_revision = 0x0a2700, | |
377 | .model_id = 0x00007e, | |
378 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 379 | } |
1da177e4 LT |
380 | }; |
381 | ||
1da177e4 LT |
382 | /************************************** |
383 | * General utility functions | |
384 | **************************************/ | |
385 | ||
1da177e4 LT |
386 | #ifndef __BIG_ENDIAN |
387 | /* | |
388 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
389 | */ | |
2b01b80b | 390 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
391 | { |
392 | u32 *temp = buffer; | |
393 | ||
394 | for (length = (length >> 2); length--; ) | |
395 | temp[length] = be32_to_cpu(temp[length]); | |
1da177e4 LT |
396 | } |
397 | ||
398 | /* | |
399 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
400 | */ | |
2b01b80b | 401 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
402 | { |
403 | u32 *temp = buffer; | |
404 | ||
405 | for (length = (length >> 2); length--; ) | |
406 | temp[length] = cpu_to_be32(temp[length]); | |
1da177e4 LT |
407 | } |
408 | #else /* BIG_ENDIAN */ | |
409 | /* Why waste the cpu cycles? */ | |
611aa19f SR |
410 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
411 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
412 | #endif |
413 | ||
ca0c7453 | 414 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
e8398bb7 | 415 | |
1da177e4 | 416 | /* |
e8398bb7 SR |
417 | * Waits for completion of an SBP-2 access request. |
418 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 419 | */ |
138c8af8 | 420 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
1da177e4 | 421 | { |
ca0c7453 | 422 | long leftover; |
1da177e4 | 423 | |
ca0c7453 | 424 | leftover = wait_event_interruptible_timeout( |
138c8af8 SR |
425 | sbp2_access_wq, lu->access_complete, timeout); |
426 | lu->access_complete = 0; | |
e8398bb7 | 427 | return leftover <= 0; |
1da177e4 LT |
428 | } |
429 | ||
138c8af8 | 430 | static void sbp2_free_packet(void *packet) |
1da177e4 LT |
431 | { |
432 | hpsb_free_tlabel(packet); | |
433 | hpsb_free_packet(packet); | |
434 | } | |
435 | ||
e8ca5668 SR |
436 | /* |
437 | * This is much like hpsb_node_write(), except it ignores the response | |
438 | * subaction and returns immediately. Can be used from atomic context. | |
1da177e4 LT |
439 | */ |
440 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
138c8af8 | 441 | quadlet_t *buf, size_t len) |
1da177e4 LT |
442 | { |
443 | struct hpsb_packet *packet; | |
444 | ||
138c8af8 | 445 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
a237f35f SR |
446 | if (!packet) |
447 | return -ENOMEM; | |
1da177e4 | 448 | |
138c8af8 | 449 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
1da177e4 | 450 | hpsb_node_fill_packet(ne, packet); |
a237f35f | 451 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
452 | sbp2_free_packet(packet); |
453 | return -EIO; | |
454 | } | |
1da177e4 LT |
455 | return 0; |
456 | } | |
457 | ||
138c8af8 SR |
458 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
459 | quadlet_t *data, size_t len) | |
09ee67ab | 460 | { |
138c8af8 SR |
461 | /* There is a small window after a bus reset within which the node |
462 | * entry's generation is current but the reconnect wasn't completed. */ | |
463 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) | |
09ee67ab SR |
464 | return; |
465 | ||
138c8af8 | 466 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
09ee67ab SR |
467 | data, len)) |
468 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
138c8af8 SR |
469 | |
470 | /* Now accept new SCSI commands, unless a bus reset happended during | |
471 | * hpsb_node_write. */ | |
472 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) | |
473 | scsi_unblock_requests(lu->shost); | |
09ee67ab SR |
474 | } |
475 | ||
c4028958 | 476 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
09ee67ab | 477 | { |
ec9b7e10 | 478 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
09ee67ab SR |
479 | quadlet_t data[2]; |
480 | ||
ec9b7e10 SR |
481 | data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); |
482 | data[1] = lu->last_orb_dma; | |
09ee67ab | 483 | sbp2util_cpu_to_be32_buffer(data, 8); |
ec9b7e10 | 484 | sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); |
09ee67ab SR |
485 | } |
486 | ||
c4028958 | 487 | static void sbp2util_write_doorbell(struct work_struct *work) |
09ee67ab | 488 | { |
ec9b7e10 SR |
489 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
490 | ||
491 | sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); | |
09ee67ab SR |
492 | } |
493 | ||
138c8af8 | 494 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
1da177e4 | 495 | { |
138c8af8 | 496 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 497 | struct sbp2_command_info *cmd; |
3d269cb5 | 498 | int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
1da177e4 | 499 | |
1da177e4 | 500 | for (i = 0; i < orbs; i++) { |
3d269cb5 SR |
501 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
502 | if (!cmd) | |
a237f35f | 503 | return -ENOMEM; |
97d552e3 | 504 | cmd->command_orb_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
505 | &cmd->command_orb, |
506 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 507 | DMA_TO_DEVICE); |
97d552e3 | 508 | cmd->sge_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
509 | &cmd->scatter_gather_element, |
510 | sizeof(cmd->scatter_gather_element), | |
2446a79f | 511 | DMA_TO_DEVICE); |
138c8af8 SR |
512 | INIT_LIST_HEAD(&cmd->list); |
513 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); | |
1da177e4 | 514 | } |
1da177e4 LT |
515 | return 0; |
516 | } | |
517 | ||
a2ee3f9b SR |
518 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, |
519 | struct hpsb_host *host) | |
1da177e4 | 520 | { |
1da177e4 | 521 | struct list_head *lh, *next; |
138c8af8 | 522 | struct sbp2_command_info *cmd; |
1da177e4 LT |
523 | unsigned long flags; |
524 | ||
138c8af8 SR |
525 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
526 | if (!list_empty(&lu->cmd_orb_completed)) | |
527 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { | |
528 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
529 | dma_unmap_single(host->device.parent, |
530 | cmd->command_orb_dma, | |
1da177e4 | 531 | sizeof(struct sbp2_command_orb), |
9b7d9c09 | 532 | DMA_TO_DEVICE); |
97d552e3 | 533 | dma_unmap_single(host->device.parent, cmd->sge_dma, |
138c8af8 | 534 | sizeof(cmd->scatter_gather_element), |
2446a79f | 535 | DMA_TO_DEVICE); |
138c8af8 | 536 | kfree(cmd); |
1da177e4 | 537 | } |
138c8af8 | 538 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
539 | return; |
540 | } | |
541 | ||
542 | /* | |
e8ca5668 SR |
543 | * Finds the sbp2_command for a given outstanding command ORB. |
544 | * Only looks at the in-use list. | |
1da177e4 LT |
545 | */ |
546 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
138c8af8 | 547 | struct sbp2_lu *lu, dma_addr_t orb) |
1da177e4 | 548 | { |
138c8af8 | 549 | struct sbp2_command_info *cmd; |
1da177e4 LT |
550 | unsigned long flags; |
551 | ||
138c8af8 SR |
552 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
553 | if (!list_empty(&lu->cmd_orb_inuse)) | |
554 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
555 | if (cmd->command_orb_dma == orb) { | |
556 | spin_unlock_irqrestore( | |
557 | &lu->cmd_orb_lock, flags); | |
558 | return cmd; | |
1da177e4 | 559 | } |
138c8af8 | 560 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
a237f35f | 561 | return NULL; |
1da177e4 LT |
562 | } |
563 | ||
564 | /* | |
e8ca5668 SR |
565 | * Finds the sbp2_command for a given outstanding SCpnt. |
566 | * Only looks at the in-use list. | |
138c8af8 | 567 | * Must be called with lu->cmd_orb_lock held. |
1da177e4 | 568 | */ |
24c7cd06 | 569 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
138c8af8 | 570 | struct sbp2_lu *lu, void *SCpnt) |
1da177e4 | 571 | { |
138c8af8 | 572 | struct sbp2_command_info *cmd; |
1da177e4 | 573 | |
138c8af8 SR |
574 | if (!list_empty(&lu->cmd_orb_inuse)) |
575 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
576 | if (cmd->Current_SCpnt == SCpnt) | |
577 | return cmd; | |
a237f35f | 578 | return NULL; |
1da177e4 LT |
579 | } |
580 | ||
1da177e4 | 581 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
138c8af8 SR |
582 | struct sbp2_lu *lu, |
583 | struct scsi_cmnd *Current_SCpnt, | |
584 | void (*Current_done)(struct scsi_cmnd *)) | |
1da177e4 LT |
585 | { |
586 | struct list_head *lh; | |
138c8af8 | 587 | struct sbp2_command_info *cmd = NULL; |
1da177e4 LT |
588 | unsigned long flags; |
589 | ||
138c8af8 SR |
590 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
591 | if (!list_empty(&lu->cmd_orb_completed)) { | |
592 | lh = lu->cmd_orb_completed.next; | |
1da177e4 | 593 | list_del(lh); |
138c8af8 SR |
594 | cmd = list_entry(lh, struct sbp2_command_info, list); |
595 | cmd->Current_done = Current_done; | |
596 | cmd->Current_SCpnt = Current_SCpnt; | |
597 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); | |
598 | } else | |
d024ebc6 | 599 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
138c8af8 SR |
600 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
601 | return cmd; | |
1da177e4 LT |
602 | } |
603 | ||
58272c1c SR |
604 | /* |
605 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. | |
606 | * Must be called with lu->cmd_orb_lock held. | |
607 | */ | |
608 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, | |
609 | struct sbp2_command_info *cmd) | |
1da177e4 | 610 | { |
58272c1c | 611 | struct hpsb_host *host = lu->ud->ne->host; |
1da177e4 | 612 | |
138c8af8 SR |
613 | if (cmd->cmd_dma) { |
614 | if (cmd->dma_type == CMD_DMA_SINGLE) | |
97d552e3 | 615 | dma_unmap_single(host->device.parent, cmd->cmd_dma, |
138c8af8 SR |
616 | cmd->dma_size, cmd->dma_dir); |
617 | else if (cmd->dma_type == CMD_DMA_PAGE) | |
97d552e3 | 618 | dma_unmap_page(host->device.parent, cmd->cmd_dma, |
138c8af8 | 619 | cmd->dma_size, cmd->dma_dir); |
edf1fb21 | 620 | /* XXX: Check for CMD_DMA_NONE bug */ |
138c8af8 SR |
621 | cmd->dma_type = CMD_DMA_NONE; |
622 | cmd->cmd_dma = 0; | |
1da177e4 | 623 | } |
138c8af8 | 624 | if (cmd->sge_buffer) { |
97d552e3 | 625 | dma_unmap_sg(host->device.parent, cmd->sge_buffer, |
138c8af8 SR |
626 | cmd->dma_size, cmd->dma_dir); |
627 | cmd->sge_buffer = NULL; | |
1da177e4 | 628 | } |
cd641f68 | 629 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
1da177e4 LT |
630 | } |
631 | ||
abd559b1 | 632 | /* |
138c8af8 | 633 | * Is lu valid? Is the 1394 node still present? |
abd559b1 | 634 | */ |
138c8af8 | 635 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
abd559b1 | 636 | { |
138c8af8 | 637 | return lu && lu->ne && !lu->ne->in_limbo; |
abd559b1 JM |
638 | } |
639 | ||
1da177e4 LT |
640 | /********************************************* |
641 | * IEEE-1394 core driver stack related section | |
642 | *********************************************/ | |
1da177e4 LT |
643 | |
644 | static int sbp2_probe(struct device *dev) | |
645 | { | |
646 | struct unit_directory *ud; | |
138c8af8 | 647 | struct sbp2_lu *lu; |
1da177e4 | 648 | |
1da177e4 LT |
649 | ud = container_of(dev, struct unit_directory, device); |
650 | ||
651 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
652 | * instead. */ | |
653 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
654 | return -ENODEV; | |
655 | ||
138c8af8 SR |
656 | lu = sbp2_alloc_device(ud); |
657 | if (!lu) | |
a237f35f | 658 | return -ENOMEM; |
1da177e4 | 659 | |
138c8af8 SR |
660 | sbp2_parse_unit_directory(lu, ud); |
661 | return sbp2_start_device(lu); | |
1da177e4 LT |
662 | } |
663 | ||
664 | static int sbp2_remove(struct device *dev) | |
665 | { | |
666 | struct unit_directory *ud; | |
138c8af8 | 667 | struct sbp2_lu *lu; |
abd559b1 | 668 | struct scsi_device *sdev; |
1da177e4 | 669 | |
1da177e4 | 670 | ud = container_of(dev, struct unit_directory, device); |
138c8af8 SR |
671 | lu = ud->device.driver_data; |
672 | if (!lu) | |
abd559b1 JM |
673 | return 0; |
674 | ||
138c8af8 | 675 | if (lu->shost) { |
bf637ec3 SR |
676 | /* Get rid of enqueued commands if there is no chance to |
677 | * send them. */ | |
138c8af8 SR |
678 | if (!sbp2util_node_is_available(lu)) |
679 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); | |
e8ca5668 | 680 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
bf637ec3 | 681 | * highlevel drivers which would deadlock if blocked. */ |
138c8af8 SR |
682 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
683 | scsi_unblock_requests(lu->shost); | |
bf637ec3 | 684 | } |
138c8af8 | 685 | sdev = lu->sdev; |
abd559b1 | 686 | if (sdev) { |
138c8af8 | 687 | lu->sdev = NULL; |
abd559b1 JM |
688 | scsi_remove_device(sdev); |
689 | } | |
1da177e4 | 690 | |
138c8af8 SR |
691 | sbp2_logout_device(lu); |
692 | sbp2_remove_device(lu); | |
1da177e4 LT |
693 | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static int sbp2_update(struct unit_directory *ud) | |
698 | { | |
138c8af8 | 699 | struct sbp2_lu *lu = ud->device.driver_data; |
1da177e4 | 700 | |
138c8af8 | 701 | if (sbp2_reconnect_device(lu)) { |
e8ca5668 SR |
702 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
703 | * enough. Try a regular login, but first log out just in | |
704 | * case of any weirdness. */ | |
138c8af8 | 705 | sbp2_logout_device(lu); |
1da177e4 | 706 | |
138c8af8 | 707 | if (sbp2_login_device(lu)) { |
1da177e4 LT |
708 | /* Login failed too, just fail, and the backend |
709 | * will call our sbp2_remove for us */ | |
710 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
711 | return -EBUSY; | |
712 | } | |
713 | } | |
714 | ||
138c8af8 SR |
715 | sbp2_set_busy_timeout(lu); |
716 | sbp2_agent_reset(lu, 1); | |
717 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 718 | |
e8ca5668 SR |
719 | /* Complete any pending commands with busy (so they get retried) |
720 | * and remove them from our queue. */ | |
138c8af8 | 721 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 | 722 | |
4fc383c0 SR |
723 | /* Accept new commands unless there was another bus reset in the |
724 | * meantime. */ | |
138c8af8 SR |
725 | if (hpsb_node_entry_valid(lu->ne)) { |
726 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
727 | scsi_unblock_requests(lu->shost); | |
4fc383c0 | 728 | } |
1da177e4 LT |
729 | return 0; |
730 | } | |
731 | ||
138c8af8 | 732 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
1da177e4 | 733 | { |
ca0c7453 | 734 | struct sbp2_fwhost_info *hi; |
138c8af8 SR |
735 | struct Scsi_Host *shost = NULL; |
736 | struct sbp2_lu *lu = NULL; | |
261b5f66 | 737 | unsigned long flags; |
1da177e4 | 738 | |
138c8af8 SR |
739 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
740 | if (!lu) { | |
741 | SBP2_ERR("failed to create lu"); | |
1da177e4 LT |
742 | goto failed_alloc; |
743 | } | |
1da177e4 | 744 | |
138c8af8 SR |
745 | lu->ne = ud->ne; |
746 | lu->ud = ud; | |
747 | lu->speed_code = IEEE1394_SPEED_100; | |
748 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
749 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; | |
750 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); | |
751 | INIT_LIST_HEAD(&lu->cmd_orb_completed); | |
752 | INIT_LIST_HEAD(&lu->lu_list); | |
753 | spin_lock_init(&lu->cmd_orb_lock); | |
754 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
755 | INIT_WORK(&lu->protocol_work, NULL); | |
1da177e4 | 756 | |
138c8af8 | 757 | ud->device.driver_data = lu; |
1da177e4 LT |
758 | |
759 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
760 | if (!hi) { | |
138c8af8 SR |
761 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
762 | sizeof(*hi)); | |
1da177e4 LT |
763 | if (!hi) { |
764 | SBP2_ERR("failed to allocate hostinfo"); | |
765 | goto failed_alloc; | |
766 | } | |
1da177e4 | 767 | hi->host = ud->ne->host; |
138c8af8 | 768 | INIT_LIST_HEAD(&hi->logical_units); |
1da177e4 | 769 | |
1da177e4 LT |
770 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
771 | /* Handle data movement if physical dma is not | |
55664051 SR |
772 | * enabled or not supported on host controller */ |
773 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
774 | &sbp2_physdma_ops, | |
775 | 0x0ULL, 0xfffffffcULL)) { | |
776 | SBP2_ERR("failed to register lower 4GB address range"); | |
777 | goto failed_alloc; | |
778 | } | |
1da177e4 LT |
779 | #endif |
780 | } | |
781 | ||
147830f2 SR |
782 | /* Prevent unloading of the 1394 host */ |
783 | if (!try_module_get(hi->host->driver->owner)) { | |
784 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
785 | goto failed_alloc; | |
786 | } | |
787 | ||
138c8af8 | 788 | lu->hi = hi; |
1da177e4 | 789 | |
261b5f66 | 790 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 791 | list_add_tail(&lu->lu_list, &hi->logical_units); |
261b5f66 | 792 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 793 | |
35bdddb8 SR |
794 | /* Register the status FIFO address range. We could use the same FIFO |
795 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
796 | * target in order to support multi-unit devices. |
797 | * The FIFO is located out of the local host controller's physical range | |
798 | * but, if possible, within the posted write area. Status writes will | |
799 | * then be performed as unified transactions. This slightly reduces | |
800 | * bandwidth usage, and some Prolific based devices seem to require it. | |
801 | */ | |
138c8af8 | 802 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
35bdddb8 SR |
803 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
804 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 805 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
138c8af8 | 806 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
807 | SBP2_ERR("failed to allocate status FIFO address range"); |
808 | goto failed_alloc; | |
809 | } | |
810 | ||
138c8af8 SR |
811 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
812 | if (!shost) { | |
1da177e4 LT |
813 | SBP2_ERR("failed to register scsi host"); |
814 | goto failed_alloc; | |
815 | } | |
816 | ||
138c8af8 | 817 | shost->hostdata[0] = (unsigned long)lu; |
1da177e4 | 818 | |
138c8af8 SR |
819 | if (!scsi_add_host(shost, &ud->device)) { |
820 | lu->shost = shost; | |
821 | return lu; | |
1da177e4 LT |
822 | } |
823 | ||
824 | SBP2_ERR("failed to add scsi host"); | |
138c8af8 | 825 | scsi_host_put(shost); |
1da177e4 LT |
826 | |
827 | failed_alloc: | |
138c8af8 | 828 | sbp2_remove_device(lu); |
1da177e4 LT |
829 | return NULL; |
830 | } | |
831 | ||
1da177e4 LT |
832 | static void sbp2_host_reset(struct hpsb_host *host) |
833 | { | |
ca0c7453 | 834 | struct sbp2_fwhost_info *hi; |
138c8af8 | 835 | struct sbp2_lu *lu; |
261b5f66 | 836 | unsigned long flags; |
1da177e4 LT |
837 | |
838 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
839 | if (!hi) |
840 | return; | |
261b5f66 SR |
841 | |
842 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); | |
138c8af8 SR |
843 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
844 | if (likely(atomic_read(&lu->state) != | |
2cccbb55 | 845 | SBP2LU_STATE_IN_SHUTDOWN)) { |
138c8af8 SR |
846 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
847 | scsi_block_requests(lu->shost); | |
09ee67ab | 848 | } |
261b5f66 | 849 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 LT |
850 | } |
851 | ||
138c8af8 | 852 | static int sbp2_start_device(struct sbp2_lu *lu) |
1da177e4 | 853 | { |
138c8af8 | 854 | struct sbp2_fwhost_info *hi = lu->hi; |
146f7262 | 855 | int error; |
1da177e4 | 856 | |
97d552e3 | 857 | lu->login_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 858 | sizeof(struct sbp2_login_response), |
9b7d9c09 | 859 | &lu->login_response_dma, GFP_KERNEL); |
138c8af8 | 860 | if (!lu->login_response) |
1da177e4 | 861 | goto alloc_fail; |
1da177e4 | 862 | |
97d552e3 | 863 | lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 864 | sizeof(struct sbp2_query_logins_orb), |
9b7d9c09 | 865 | &lu->query_logins_orb_dma, GFP_KERNEL); |
138c8af8 | 866 | if (!lu->query_logins_orb) |
1da177e4 | 867 | goto alloc_fail; |
1da177e4 | 868 | |
97d552e3 | 869 | lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 870 | sizeof(struct sbp2_query_logins_response), |
9b7d9c09 | 871 | &lu->query_logins_response_dma, GFP_KERNEL); |
138c8af8 | 872 | if (!lu->query_logins_response) |
1da177e4 | 873 | goto alloc_fail; |
1da177e4 | 874 | |
97d552e3 | 875 | lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 876 | sizeof(struct sbp2_reconnect_orb), |
9b7d9c09 | 877 | &lu->reconnect_orb_dma, GFP_KERNEL); |
138c8af8 | 878 | if (!lu->reconnect_orb) |
1da177e4 | 879 | goto alloc_fail; |
1da177e4 | 880 | |
97d552e3 | 881 | lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 882 | sizeof(struct sbp2_logout_orb), |
9b7d9c09 | 883 | &lu->logout_orb_dma, GFP_KERNEL); |
138c8af8 | 884 | if (!lu->logout_orb) |
1da177e4 | 885 | goto alloc_fail; |
1da177e4 | 886 | |
97d552e3 | 887 | lu->login_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 888 | sizeof(struct sbp2_login_orb), |
9b7d9c09 | 889 | &lu->login_orb_dma, GFP_KERNEL); |
138c8af8 | 890 | if (!lu->login_orb) |
eaceec7f | 891 | goto alloc_fail; |
1da177e4 | 892 | |
3d269cb5 SR |
893 | if (sbp2util_create_command_orb_pool(lu)) |
894 | goto alloc_fail; | |
1da177e4 | 895 | |
e8ca5668 SR |
896 | /* Wait a second before trying to log in. Previously logged in |
897 | * initiators need a chance to reconnect. */ | |
902abed1 | 898 | if (msleep_interruptible(1000)) { |
138c8af8 | 899 | sbp2_remove_device(lu); |
1da177e4 LT |
900 | return -EINTR; |
901 | } | |
a237f35f | 902 | |
138c8af8 SR |
903 | if (sbp2_login_device(lu)) { |
904 | sbp2_remove_device(lu); | |
1da177e4 LT |
905 | return -EBUSY; |
906 | } | |
907 | ||
138c8af8 SR |
908 | sbp2_set_busy_timeout(lu); |
909 | sbp2_agent_reset(lu, 1); | |
910 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 911 | |
138c8af8 | 912 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
146f7262 | 913 | if (error) { |
1da177e4 | 914 | SBP2_ERR("scsi_add_device failed"); |
138c8af8 SR |
915 | sbp2_logout_device(lu); |
916 | sbp2_remove_device(lu); | |
146f7262 | 917 | return error; |
1da177e4 LT |
918 | } |
919 | ||
920 | return 0; | |
eaceec7f SR |
921 | |
922 | alloc_fail: | |
138c8af8 SR |
923 | SBP2_ERR("Could not allocate memory for lu"); |
924 | sbp2_remove_device(lu); | |
eaceec7f | 925 | return -ENOMEM; |
1da177e4 LT |
926 | } |
927 | ||
138c8af8 | 928 | static void sbp2_remove_device(struct sbp2_lu *lu) |
1da177e4 | 929 | { |
ca0c7453 | 930 | struct sbp2_fwhost_info *hi; |
261b5f66 | 931 | unsigned long flags; |
1da177e4 | 932 | |
138c8af8 | 933 | if (!lu) |
1da177e4 | 934 | return; |
138c8af8 | 935 | hi = lu->hi; |
a2ee3f9b SR |
936 | if (!hi) |
937 | goto no_hi; | |
1da177e4 | 938 | |
138c8af8 SR |
939 | if (lu->shost) { |
940 | scsi_remove_host(lu->shost); | |
941 | scsi_host_put(lu->shost); | |
1da177e4 | 942 | } |
09ee67ab | 943 | flush_scheduled_work(); |
a2ee3f9b | 944 | sbp2util_remove_command_orb_pool(lu, hi->host); |
1da177e4 | 945 | |
261b5f66 | 946 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 947 | list_del(&lu->lu_list); |
261b5f66 | 948 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 949 | |
138c8af8 | 950 | if (lu->login_response) |
97d552e3 | 951 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 952 | sizeof(struct sbp2_login_response), |
138c8af8 SR |
953 | lu->login_response, |
954 | lu->login_response_dma); | |
955 | if (lu->login_orb) | |
97d552e3 | 956 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 957 | sizeof(struct sbp2_login_orb), |
138c8af8 SR |
958 | lu->login_orb, |
959 | lu->login_orb_dma); | |
960 | if (lu->reconnect_orb) | |
97d552e3 | 961 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 962 | sizeof(struct sbp2_reconnect_orb), |
138c8af8 SR |
963 | lu->reconnect_orb, |
964 | lu->reconnect_orb_dma); | |
965 | if (lu->logout_orb) | |
97d552e3 | 966 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 967 | sizeof(struct sbp2_logout_orb), |
138c8af8 SR |
968 | lu->logout_orb, |
969 | lu->logout_orb_dma); | |
970 | if (lu->query_logins_orb) | |
97d552e3 | 971 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 972 | sizeof(struct sbp2_query_logins_orb), |
138c8af8 SR |
973 | lu->query_logins_orb, |
974 | lu->query_logins_orb_dma); | |
975 | if (lu->query_logins_response) | |
97d552e3 | 976 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 977 | sizeof(struct sbp2_query_logins_response), |
138c8af8 SR |
978 | lu->query_logins_response, |
979 | lu->query_logins_response_dma); | |
1da177e4 | 980 | |
138c8af8 | 981 | if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 982 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
138c8af8 | 983 | lu->status_fifo_addr); |
35bdddb8 | 984 | |
138c8af8 | 985 | lu->ud->device.driver_data = NULL; |
1da177e4 | 986 | |
a2ee3f9b SR |
987 | module_put(hi->host->driver->owner); |
988 | no_hi: | |
138c8af8 | 989 | kfree(lu); |
1da177e4 LT |
990 | } |
991 | ||
992 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
993 | /* | |
e8ca5668 SR |
994 | * Deal with write requests on adapters which do not support physical DMA or |
995 | * have it switched off. | |
1da177e4 | 996 | */ |
a237f35f SR |
997 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
998 | int destid, quadlet_t *data, u64 addr, | |
999 | size_t length, u16 flags) | |
1da177e4 | 1000 | { |
a237f35f | 1001 | memcpy(bus_to_virt((u32) addr), data, length); |
a237f35f | 1002 | return RCODE_COMPLETE; |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | /* | |
e8ca5668 SR |
1006 | * Deal with read requests on adapters which do not support physical DMA or |
1007 | * have it switched off. | |
1da177e4 | 1008 | */ |
a237f35f SR |
1009 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1010 | quadlet_t *data, u64 addr, size_t length, | |
1011 | u16 flags) | |
1da177e4 | 1012 | { |
a237f35f | 1013 | memcpy(data, bus_to_virt((u32) addr), length); |
a237f35f | 1014 | return RCODE_COMPLETE; |
1da177e4 LT |
1015 | } |
1016 | #endif | |
1017 | ||
1da177e4 LT |
1018 | /************************************** |
1019 | * SBP-2 protocol related section | |
1020 | **************************************/ | |
1021 | ||
138c8af8 | 1022 | static int sbp2_query_logins(struct sbp2_lu *lu) |
1da177e4 | 1023 | { |
138c8af8 | 1024 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1025 | quadlet_t data[2]; |
1026 | int max_logins; | |
1027 | int active_logins; | |
1028 | ||
138c8af8 SR |
1029 | lu->query_logins_orb->reserved1 = 0x0; |
1030 | lu->query_logins_orb->reserved2 = 0x0; | |
1da177e4 | 1031 | |
138c8af8 SR |
1032 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
1033 | lu->query_logins_orb->query_response_hi = | |
1034 | ORB_SET_NODE_ID(hi->host->node_id); | |
1035 | lu->query_logins_orb->lun_misc = | |
1036 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1037 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1038 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1039 | |
138c8af8 SR |
1040 | lu->query_logins_orb->reserved_resp_length = |
1041 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( | |
1042 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1043 | |
138c8af8 SR |
1044 | lu->query_logins_orb->status_fifo_hi = |
1045 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1046 | lu->query_logins_orb->status_fifo_lo = | |
1047 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1048 | |
138c8af8 SR |
1049 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
1050 | sizeof(struct sbp2_query_logins_orb)); | |
1da177e4 | 1051 | |
138c8af8 SR |
1052 | memset(lu->query_logins_response, 0, |
1053 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1054 | |
1da177e4 | 1055 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1056 | data[1] = lu->query_logins_orb_dma; |
1da177e4 LT |
1057 | sbp2util_cpu_to_be32_buffer(data, 8); |
1058 | ||
138c8af8 | 1059 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1060 | |
138c8af8 | 1061 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
1da177e4 | 1062 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1063 | return -EIO; |
1da177e4 LT |
1064 | } |
1065 | ||
138c8af8 | 1066 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
1da177e4 | 1067 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1068 | return -EIO; |
1da177e4 LT |
1069 | } |
1070 | ||
138c8af8 | 1071 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1072 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
a237f35f | 1073 | return -EIO; |
1da177e4 LT |
1074 | } |
1075 | ||
138c8af8 SR |
1076 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
1077 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1078 | |
138c8af8 SR |
1079 | max_logins = RESPONSE_GET_MAX_LOGINS( |
1080 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1081 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 | 1082 | |
138c8af8 SR |
1083 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
1084 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1085 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1086 | |
1087 | if (active_logins >= max_logins) { | |
a237f35f | 1088 | return -EIO; |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | ||
138c8af8 | 1094 | static int sbp2_login_device(struct sbp2_lu *lu) |
1da177e4 | 1095 | { |
138c8af8 | 1096 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1097 | quadlet_t data[2]; |
1098 | ||
138c8af8 | 1099 | if (!lu->login_orb) |
a237f35f | 1100 | return -EIO; |
1da177e4 | 1101 | |
138c8af8 | 1102 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
ca0c7453 SR |
1103 | SBP2_INFO("Device does not support any more concurrent logins"); |
1104 | return -EIO; | |
1da177e4 LT |
1105 | } |
1106 | ||
e8ca5668 | 1107 | /* assume no password */ |
138c8af8 SR |
1108 | lu->login_orb->password_hi = 0; |
1109 | lu->login_orb->password_lo = 0; | |
1da177e4 | 1110 | |
138c8af8 SR |
1111 | lu->login_orb->login_response_lo = lu->login_response_dma; |
1112 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1113 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
e8ca5668 SR |
1114 | |
1115 | /* one second reconnect time */ | |
138c8af8 SR |
1116 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
1117 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); | |
1118 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1119 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1120 | |
138c8af8 | 1121 | lu->login_orb->passwd_resp_lengths = |
1da177e4 | 1122 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
1da177e4 | 1123 | |
138c8af8 SR |
1124 | lu->login_orb->status_fifo_hi = |
1125 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1126 | lu->login_orb->status_fifo_lo = | |
1127 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1128 | |
138c8af8 SR |
1129 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
1130 | sizeof(struct sbp2_login_orb)); | |
1da177e4 | 1131 | |
138c8af8 | 1132 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1133 | |
1da177e4 | 1134 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1135 | data[1] = lu->login_orb_dma; |
1da177e4 LT |
1136 | sbp2util_cpu_to_be32_buffer(data, 8); |
1137 | ||
138c8af8 | 1138 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1139 | |
e8ca5668 | 1140 | /* wait up to 20 seconds for login status */ |
138c8af8 | 1141 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
e8398bb7 | 1142 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1143 | return -EIO; |
1da177e4 LT |
1144 | } |
1145 | ||
e8ca5668 | 1146 | /* make sure that the returned status matches the login ORB */ |
138c8af8 | 1147 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
6065772d | 1148 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1149 | return -EIO; |
1da177e4 LT |
1150 | } |
1151 | ||
138c8af8 | 1152 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1153 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
a237f35f | 1154 | return -EIO; |
1da177e4 LT |
1155 | } |
1156 | ||
138c8af8 SR |
1157 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
1158 | sizeof(struct sbp2_login_response)); | |
1159 | lu->command_block_agent_addr = | |
1160 | ((u64)lu->login_response->command_block_agent_hi) << 32; | |
1161 | lu->command_block_agent_addr |= | |
1162 | ((u64)lu->login_response->command_block_agent_lo); | |
1163 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1da177e4 LT |
1164 | |
1165 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1166 | return 0; |
1da177e4 LT |
1167 | } |
1168 | ||
138c8af8 | 1169 | static int sbp2_logout_device(struct sbp2_lu *lu) |
1da177e4 | 1170 | { |
138c8af8 | 1171 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1172 | quadlet_t data[2]; |
1173 | int error; | |
1174 | ||
138c8af8 SR |
1175 | lu->logout_orb->reserved1 = 0x0; |
1176 | lu->logout_orb->reserved2 = 0x0; | |
1177 | lu->logout_orb->reserved3 = 0x0; | |
1178 | lu->logout_orb->reserved4 = 0x0; | |
1da177e4 | 1179 | |
138c8af8 SR |
1180 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
1181 | lu->logout_orb->login_ID_misc |= | |
1182 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1183 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1184 | |
138c8af8 SR |
1185 | lu->logout_orb->reserved5 = 0x0; |
1186 | lu->logout_orb->status_fifo_hi = | |
1187 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1188 | lu->logout_orb->status_fifo_lo = | |
1189 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1190 | |
138c8af8 SR |
1191 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
1192 | sizeof(struct sbp2_logout_orb)); | |
1da177e4 | 1193 | |
1da177e4 | 1194 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1195 | data[1] = lu->logout_orb_dma; |
1da177e4 LT |
1196 | sbp2util_cpu_to_be32_buffer(data, 8); |
1197 | ||
138c8af8 | 1198 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1199 | if (error) |
1200 | return error; | |
1201 | ||
e8ca5668 | 1202 | /* wait up to 1 second for the device to complete logout */ |
138c8af8 | 1203 | if (sbp2util_access_timeout(lu, HZ)) |
1da177e4 LT |
1204 | return -EIO; |
1205 | ||
1206 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1207 | return 0; |
1da177e4 LT |
1208 | } |
1209 | ||
138c8af8 | 1210 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
1da177e4 | 1211 | { |
138c8af8 | 1212 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1213 | quadlet_t data[2]; |
1214 | int error; | |
1215 | ||
138c8af8 SR |
1216 | lu->reconnect_orb->reserved1 = 0x0; |
1217 | lu->reconnect_orb->reserved2 = 0x0; | |
1218 | lu->reconnect_orb->reserved3 = 0x0; | |
1219 | lu->reconnect_orb->reserved4 = 0x0; | |
1da177e4 | 1220 | |
138c8af8 SR |
1221 | lu->reconnect_orb->login_ID_misc = |
1222 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1223 | lu->reconnect_orb->login_ID_misc |= | |
1224 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1225 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1226 | |
138c8af8 SR |
1227 | lu->reconnect_orb->reserved5 = 0x0; |
1228 | lu->reconnect_orb->status_fifo_hi = | |
1229 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1230 | lu->reconnect_orb->status_fifo_lo = | |
1231 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1232 | |
138c8af8 SR |
1233 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
1234 | sizeof(struct sbp2_reconnect_orb)); | |
1da177e4 | 1235 | |
1da177e4 | 1236 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1237 | data[1] = lu->reconnect_orb_dma; |
1da177e4 LT |
1238 | sbp2util_cpu_to_be32_buffer(data, 8); |
1239 | ||
138c8af8 | 1240 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1241 | if (error) |
1242 | return error; | |
1243 | ||
e8ca5668 | 1244 | /* wait up to 1 second for reconnect status */ |
138c8af8 | 1245 | if (sbp2util_access_timeout(lu, HZ)) { |
e8398bb7 | 1246 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1247 | return -EIO; |
1da177e4 LT |
1248 | } |
1249 | ||
e8ca5668 | 1250 | /* make sure that the returned status matches the reconnect ORB */ |
138c8af8 | 1251 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
6065772d | 1252 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1253 | return -EIO; |
1da177e4 LT |
1254 | } |
1255 | ||
138c8af8 | 1256 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1257 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
a237f35f | 1258 | return -EIO; |
1da177e4 LT |
1259 | } |
1260 | ||
35644090 | 1261 | SBP2_INFO("Reconnected to SBP-2 device"); |
a237f35f | 1262 | return 0; |
1da177e4 LT |
1263 | } |
1264 | ||
1265 | /* | |
e8ca5668 SR |
1266 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
1267 | * behaviour if our node is too busy to accept requests. | |
1da177e4 | 1268 | */ |
138c8af8 | 1269 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
1da177e4 LT |
1270 | { |
1271 | quadlet_t data; | |
1272 | ||
1da177e4 | 1273 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
138c8af8 | 1274 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
d024ebc6 | 1275 | SBP2_ERR("%s error", __FUNCTION__); |
a237f35f | 1276 | return 0; |
1da177e4 LT |
1277 | } |
1278 | ||
138c8af8 | 1279 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
1da177e4 LT |
1280 | struct unit_directory *ud) |
1281 | { | |
1282 | struct csr1212_keyval *kv; | |
1283 | struct csr1212_dentry *dentry; | |
1284 | u64 management_agent_addr; | |
9117c6dc | 1285 | u32 unit_characteristics, firmware_revision; |
24d3bf88 | 1286 | unsigned workarounds; |
1da177e4 LT |
1287 | int i; |
1288 | ||
9117c6dc SR |
1289 | management_agent_addr = 0; |
1290 | unit_characteristics = 0; | |
1291 | firmware_revision = 0; | |
1da177e4 | 1292 | |
1da177e4 LT |
1293 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
1294 | switch (kv->key.id) { | |
1295 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
edf1fb21 | 1296 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
1da177e4 | 1297 | management_agent_addr = |
a237f35f SR |
1298 | CSR1212_REGISTER_SPACE_BASE + |
1299 | (kv->value.csr_offset << 2); | |
1da177e4 | 1300 | |
edf1fb21 | 1301 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
138c8af8 | 1302 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
1da177e4 LT |
1303 | break; |
1304 | ||
1da177e4 | 1305 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
e8ca5668 SR |
1306 | /* FIXME: This is ignored so far. |
1307 | * See SBP-2 clause 7.4.8. */ | |
1da177e4 | 1308 | unit_characteristics = kv->value.immediate; |
1da177e4 LT |
1309 | break; |
1310 | ||
1311 | case SBP2_FIRMWARE_REVISION_KEY: | |
1da177e4 | 1312 | firmware_revision = kv->value.immediate; |
1da177e4 LT |
1313 | break; |
1314 | ||
1315 | default: | |
e8ca5668 SR |
1316 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
1317 | * Its "ordered" bit has consequences for command ORB | |
1318 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ | |
1da177e4 LT |
1319 | break; |
1320 | } | |
1321 | } | |
1322 | ||
24d3bf88 | 1323 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1324 | |
679c0cd2 SR |
1325 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1326 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
4618fd30 SR |
1327 | if (sbp2_workarounds_table[i].firmware_revision != |
1328 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1329 | sbp2_workarounds_table[i].firmware_revision != |
1330 | (firmware_revision & 0xffff00)) | |
1331 | continue; | |
4618fd30 SR |
1332 | if (sbp2_workarounds_table[i].model_id != |
1333 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1334 | sbp2_workarounds_table[i].model_id != ud->model_id) |
1335 | continue; | |
1336 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1337 | break; | |
1338 | } | |
1da177e4 | 1339 | |
24d3bf88 | 1340 | if (workarounds) |
e9a1c52c SR |
1341 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1342 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1343 | " model_id 0x%06x)", | |
24d3bf88 | 1344 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1345 | workarounds, firmware_revision, |
1346 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1347 | ud->model_id); | |
24d3bf88 SR |
1348 | |
1349 | /* We would need one SCSI host template for each target to adjust | |
1350 | * max_sectors on the fly, therefore warn only. */ | |
1351 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
ca0c7453 | 1352 | (sbp2_max_sectors * 512) > (128 * 1024)) |
35644090 | 1353 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
24d3bf88 SR |
1354 | "max transfer size. WARNING: Current max_sectors " |
1355 | "setting is larger than 128KB (%d sectors)", | |
1356 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
ca0c7453 | 1357 | sbp2_max_sectors); |
24d3bf88 | 1358 | |
1da177e4 LT |
1359 | /* If this is a logical unit directory entry, process the parent |
1360 | * to get the values. */ | |
1361 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
138c8af8 SR |
1362 | struct unit_directory *parent_ud = container_of( |
1363 | ud->device.parent, struct unit_directory, device); | |
1364 | sbp2_parse_unit_directory(lu, parent_ud); | |
1da177e4 | 1365 | } else { |
138c8af8 SR |
1366 | lu->management_agent_addr = management_agent_addr; |
1367 | lu->workarounds = workarounds; | |
1da177e4 | 1368 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
138c8af8 | 1369 | lu->lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1370 | } |
1371 | } | |
1372 | ||
fd23ade8 BC |
1373 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1374 | ||
1da177e4 LT |
1375 | /* |
1376 | * This function is called in order to determine the max speed and packet | |
1377 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1378 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1379 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1380 | * device decides the actual maximum data it can transfer. We just tell it | |
1381 | * the speed that it needs to use, and the max_rec the host supports, and | |
1382 | * it takes care of the rest. | |
1383 | */ | |
138c8af8 | 1384 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
1da177e4 | 1385 | { |
138c8af8 | 1386 | struct sbp2_fwhost_info *hi = lu->hi; |
fd23ade8 | 1387 | u8 payload; |
1da177e4 | 1388 | |
138c8af8 | 1389 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
1da177e4 | 1390 | |
138c8af8 SR |
1391 | if (lu->speed_code > sbp2_max_speed) { |
1392 | lu->speed_code = sbp2_max_speed; | |
ca0c7453 SR |
1393 | SBP2_INFO("Reducing speed to %s", |
1394 | hpsb_speedto_str[sbp2_max_speed]); | |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | /* Payload size is the lesser of what our speed supports and what | |
1398 | * our host supports. */ | |
138c8af8 | 1399 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
fd23ade8 BC |
1400 | (u8) (hi->host->csr.max_rec - 1)); |
1401 | ||
1402 | /* If physical DMA is off, work around limitation in ohci1394: | |
1403 | * packet size must not exceed PAGE_SIZE */ | |
138c8af8 | 1404 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
fd23ade8 BC |
1405 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
1406 | payload) | |
1407 | payload--; | |
1da177e4 | 1408 | |
35644090 | 1409 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
138c8af8 SR |
1410 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
1411 | hpsb_speedto_str[lu->speed_code], | |
35644090 | 1412 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1413 | |
138c8af8 | 1414 | lu->max_payload_size = payload; |
a237f35f | 1415 | return 0; |
1da177e4 LT |
1416 | } |
1417 | ||
138c8af8 | 1418 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
1da177e4 LT |
1419 | { |
1420 | quadlet_t data; | |
1421 | u64 addr; | |
1422 | int retval; | |
cc078189 | 1423 | unsigned long flags; |
1da177e4 | 1424 | |
ec9b7e10 | 1425 | /* flush lu->protocol_work */ |
09ee67ab SR |
1426 | if (wait) |
1427 | flush_scheduled_work(); | |
1428 | ||
1da177e4 | 1429 | data = ntohl(SBP2_AGENT_RESET_DATA); |
138c8af8 | 1430 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
1da177e4 LT |
1431 | |
1432 | if (wait) | |
138c8af8 | 1433 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
1da177e4 | 1434 | else |
138c8af8 | 1435 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
1da177e4 LT |
1436 | |
1437 | if (retval < 0) { | |
1438 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1439 | return -EIO; | |
1440 | } | |
1441 | ||
e8ca5668 | 1442 | /* make sure that the ORB_POINTER is written on next command */ |
138c8af8 SR |
1443 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1444 | lu->last_orb = NULL; | |
1445 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1446 | |
a237f35f | 1447 | return 0; |
1da177e4 LT |
1448 | } |
1449 | ||
cf8d2c09 | 1450 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
ca0c7453 | 1451 | struct sbp2_fwhost_info *hi, |
138c8af8 | 1452 | struct sbp2_command_info *cmd, |
cf8d2c09 | 1453 | unsigned int scsi_use_sg, |
825f1df5 | 1454 | struct scatterlist *sg, |
cf8d2c09 SR |
1455 | u32 orb_direction, |
1456 | enum dma_data_direction dma_dir) | |
1457 | { | |
138c8af8 | 1458 | cmd->dma_dir = dma_dir; |
cf8d2c09 SR |
1459 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
1460 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1461 | ||
e8ca5668 | 1462 | /* special case if only one element (and less than 64KB in size) */ |
cf8d2c09 | 1463 | if ((scsi_use_sg == 1) && |
825f1df5 | 1464 | (sg_dma_len(sg) <= SBP2_MAX_SG_ELEMENT_LENGTH)) { |
cf8d2c09 | 1465 | |
825f1df5 | 1466 | cmd->dma_size = sg_dma_len(sg); |
138c8af8 | 1467 | cmd->dma_type = CMD_DMA_PAGE; |
97d552e3 | 1468 | cmd->cmd_dma = dma_map_page(hi->host->device.parent, |
825f1df5 | 1469 | sg_page(sg), sg->offset, |
138c8af8 | 1470 | cmd->dma_size, cmd->dma_dir); |
cf8d2c09 | 1471 | |
138c8af8 SR |
1472 | orb->data_descriptor_lo = cmd->cmd_dma; |
1473 | orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size); | |
cf8d2c09 SR |
1474 | |
1475 | } else { | |
1476 | struct sbp2_unrestricted_page_table *sg_element = | |
138c8af8 | 1477 | &cmd->scatter_gather_element[0]; |
cf8d2c09 SR |
1478 | u32 sg_count, sg_len; |
1479 | dma_addr_t sg_addr; | |
825f1df5 | 1480 | int i, count = dma_map_sg(hi->host->device.parent, sg, |
97d552e3 | 1481 | scsi_use_sg, dma_dir); |
cf8d2c09 | 1482 | |
138c8af8 | 1483 | cmd->dma_size = scsi_use_sg; |
825f1df5 | 1484 | cmd->sge_buffer = sg; |
cf8d2c09 SR |
1485 | |
1486 | /* use page tables (s/g) */ | |
1487 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
138c8af8 | 1488 | orb->data_descriptor_lo = cmd->sge_dma; |
cf8d2c09 | 1489 | |
e8ca5668 SR |
1490 | /* loop through and fill out our SBP-2 page tables |
1491 | * (and split up anything too large) */ | |
825f1df5 SR |
1492 | for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) { |
1493 | sg_len = sg_dma_len(sg); | |
1494 | sg_addr = sg_dma_address(sg); | |
cf8d2c09 SR |
1495 | while (sg_len) { |
1496 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1497 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1498 | sg_element[sg_count].length_segment_base_hi = | |
1499 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1500 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1501 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1502 | } else { | |
1503 | sg_element[sg_count].length_segment_base_hi = | |
1504 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1505 | sg_len = 0; | |
1506 | } | |
1507 | sg_count++; | |
1508 | } | |
1509 | } | |
1510 | ||
cf8d2c09 SR |
1511 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
1512 | ||
cf8d2c09 | 1513 | sbp2util_cpu_to_be32_buffer(sg_element, |
138c8af8 SR |
1514 | (sizeof(struct sbp2_unrestricted_page_table)) * |
1515 | sg_count); | |
cf8d2c09 SR |
1516 | } |
1517 | } | |
1518 | ||
138c8af8 SR |
1519 | static void sbp2_create_command_orb(struct sbp2_lu *lu, |
1520 | struct sbp2_command_info *cmd, | |
cf8d2c09 SR |
1521 | unchar *scsi_cmd, |
1522 | unsigned int scsi_use_sg, | |
1523 | unsigned int scsi_request_bufflen, | |
825f1df5 | 1524 | struct scatterlist *sg, |
cf8d2c09 | 1525 | enum dma_data_direction dma_dir) |
1da177e4 | 1526 | { |
138c8af8 | 1527 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 1528 | struct sbp2_command_orb *orb = &cmd->command_orb; |
cf8d2c09 | 1529 | u32 orb_direction; |
1da177e4 LT |
1530 | |
1531 | /* | |
e8ca5668 | 1532 | * Set-up our command ORB. |
1da177e4 LT |
1533 | * |
1534 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1535 | * best performance (at least with the devices I have). This means | |
1536 | * that data_size becomes the number of s/g elements, and | |
1537 | * page_size should be zero (for unrestricted). | |
1538 | */ | |
138c8af8 SR |
1539 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
1540 | orb->next_ORB_lo = 0x0; | |
1541 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); | |
1542 | orb->misc |= ORB_SET_SPEED(lu->speed_code); | |
1543 | orb->misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1544 | |
43863eba | 1545 | if (dma_dir == DMA_NONE) |
a237f35f | 1546 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1547 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1548 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1549 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1550 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba | 1551 | else { |
35644090 | 1552 | SBP2_INFO("Falling back to DMA_NONE"); |
43863eba | 1553 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
1da177e4 LT |
1554 | } |
1555 | ||
e8ca5668 | 1556 | /* set up our page table stuff */ |
1da177e4 | 1557 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
138c8af8 SR |
1558 | orb->data_descriptor_hi = 0x0; |
1559 | orb->data_descriptor_lo = 0x0; | |
1560 | orb->misc |= ORB_SET_DIRECTION(1); | |
d7dea2cf | 1561 | } else |
825f1df5 | 1562 | sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg, |
138c8af8 | 1563 | orb_direction, dma_dir); |
1da177e4 | 1564 | |
138c8af8 | 1565 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
1da177e4 | 1566 | |
138c8af8 SR |
1567 | memset(orb->cdb, 0, 12); |
1568 | memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1569 | } |
1570 | ||
138c8af8 SR |
1571 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
1572 | struct sbp2_command_info *cmd) | |
1da177e4 | 1573 | { |
138c8af8 | 1574 | struct sbp2_fwhost_info *hi = lu->hi; |
cc078189 SR |
1575 | struct sbp2_command_orb *last_orb; |
1576 | dma_addr_t last_orb_dma; | |
138c8af8 | 1577 | u64 addr = lu->command_block_agent_addr; |
cc078189 SR |
1578 | quadlet_t data[2]; |
1579 | size_t length; | |
1580 | unsigned long flags; | |
1da177e4 | 1581 | |
97d552e3 SR |
1582 | dma_sync_single_for_device(hi->host->device.parent, |
1583 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1584 | sizeof(struct sbp2_command_orb), |
1585 | DMA_TO_DEVICE); | |
97d552e3 | 1586 | dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1587 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1588 | DMA_TO_DEVICE); |
e8ca5668 SR |
1589 | |
1590 | /* check to see if there are any previous orbs to use */ | |
138c8af8 SR |
1591 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1592 | last_orb = lu->last_orb; | |
1593 | last_orb_dma = lu->last_orb_dma; | |
cc078189 | 1594 | if (!last_orb) { |
1da177e4 | 1595 | /* |
cc078189 SR |
1596 | * last_orb == NULL means: We know that the target's fetch agent |
1597 | * is not active right now. | |
1da177e4 | 1598 | */ |
cc078189 | 1599 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 | 1600 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1601 | data[1] = cmd->command_orb_dma; |
1da177e4 | 1602 | sbp2util_cpu_to_be32_buffer(data, 8); |
cc078189 | 1603 | length = 8; |
1da177e4 | 1604 | } else { |
1da177e4 | 1605 | /* |
cc078189 SR |
1606 | * last_orb != NULL means: We know that the target's fetch agent |
1607 | * is (very probably) not dead or in reset state right now. | |
1608 | * We have an ORB already sent that we can append a new one to. | |
1609 | * The target's fetch agent may or may not have read this | |
1610 | * previous ORB yet. | |
1da177e4 | 1611 | */ |
97d552e3 | 1612 | dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, |
9b7d9c09 SR |
1613 | sizeof(struct sbp2_command_orb), |
1614 | DMA_TO_DEVICE); | |
138c8af8 | 1615 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
cc078189 | 1616 | wmb(); |
1da177e4 | 1617 | /* Tells hardware that this pointer is valid */ |
cc078189 | 1618 | last_orb->next_ORB_hi = 0; |
97d552e3 SR |
1619 | dma_sync_single_for_device(hi->host->device.parent, |
1620 | last_orb_dma, | |
9b7d9c09 SR |
1621 | sizeof(struct sbp2_command_orb), |
1622 | DMA_TO_DEVICE); | |
cc078189 SR |
1623 | addr += SBP2_DOORBELL_OFFSET; |
1624 | data[0] = 0; | |
1625 | length = 4; | |
1626 | } | |
138c8af8 SR |
1627 | lu->last_orb = &cmd->command_orb; |
1628 | lu->last_orb_dma = cmd->command_orb_dma; | |
1629 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1630 | |
138c8af8 | 1631 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
09ee67ab SR |
1632 | /* |
1633 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
1634 | * of transaction labels, perhaps just because there were no | |
1635 | * context switches which gave khpsbpkt a chance to collect | |
1636 | * free tlabels. Try again in non-atomic context. If necessary, | |
1637 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
1638 | * We do not accept new commands until the job is over. | |
1639 | */ | |
138c8af8 SR |
1640 | scsi_block_requests(lu->shost); |
1641 | PREPARE_WORK(&lu->protocol_work, | |
09ee67ab | 1642 | last_orb ? sbp2util_write_doorbell: |
ec9b7e10 | 1643 | sbp2util_write_orb_pointer); |
138c8af8 | 1644 | schedule_work(&lu->protocol_work); |
09ee67ab | 1645 | } |
1da177e4 LT |
1646 | } |
1647 | ||
138c8af8 | 1648 | static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
1649 | void (*done)(struct scsi_cmnd *)) |
1650 | { | |
138c8af8 | 1651 | unchar *scsi_cmd = (unchar *)SCpnt->cmnd; |
138c8af8 | 1652 | struct sbp2_command_info *cmd; |
1da177e4 | 1653 | |
138c8af8 SR |
1654 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
1655 | if (!cmd) | |
a237f35f | 1656 | return -EIO; |
1da177e4 | 1657 | |
d7dea2cf | 1658 | sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt), |
825f1df5 | 1659 | scsi_bufflen(SCpnt), scsi_sglist(SCpnt), |
1da177e4 | 1660 | SCpnt->sc_data_direction); |
138c8af8 | 1661 | sbp2_link_orb_command(lu, cmd); |
1da177e4 | 1662 | |
a237f35f | 1663 | return 0; |
1da177e4 LT |
1664 | } |
1665 | ||
1da177e4 LT |
1666 | /* |
1667 | * Translates SBP-2 status into SCSI sense data for check conditions | |
1668 | */ | |
138c8af8 SR |
1669 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
1670 | unchar *sense_data) | |
1da177e4 | 1671 | { |
e8ca5668 | 1672 | /* OK, it's pretty ugly... ;-) */ |
1da177e4 LT |
1673 | sense_data[0] = 0x70; |
1674 | sense_data[1] = 0x0; | |
1675 | sense_data[2] = sbp2_status[9]; | |
1676 | sense_data[3] = sbp2_status[12]; | |
1677 | sense_data[4] = sbp2_status[13]; | |
1678 | sense_data[5] = sbp2_status[14]; | |
1679 | sense_data[6] = sbp2_status[15]; | |
1680 | sense_data[7] = 10; | |
1681 | sense_data[8] = sbp2_status[16]; | |
1682 | sense_data[9] = sbp2_status[17]; | |
1683 | sense_data[10] = sbp2_status[18]; | |
1684 | sense_data[11] = sbp2_status[19]; | |
1685 | sense_data[12] = sbp2_status[10]; | |
1686 | sense_data[13] = sbp2_status[11]; | |
1687 | sense_data[14] = sbp2_status[20]; | |
1688 | sense_data[15] = sbp2_status[21]; | |
1689 | ||
e8ca5668 | 1690 | return sbp2_status[8] & 0x3f; |
1da177e4 LT |
1691 | } |
1692 | ||
3e98eab4 SR |
1693 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
1694 | int destid, quadlet_t *data, u64 addr, | |
1695 | size_t length, u16 fl) | |
1da177e4 | 1696 | { |
ca0c7453 | 1697 | struct sbp2_fwhost_info *hi; |
138c8af8 | 1698 | struct sbp2_lu *lu = NULL, *lu_tmp; |
1da177e4 | 1699 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 1700 | struct sbp2_status_block *sb; |
1da177e4 | 1701 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
138c8af8 | 1702 | struct sbp2_command_info *cmd; |
79456197 | 1703 | unsigned long flags; |
1da177e4 | 1704 | |
6065772d SR |
1705 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
1706 | SBP2_ERR("Wrong size of status block"); | |
1707 | return RCODE_ADDRESS_ERROR; | |
1708 | } | |
1709 | if (unlikely(!host)) { | |
1da177e4 | 1710 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 1711 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1712 | } |
1da177e4 | 1713 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 1714 | if (unlikely(!hi)) { |
1da177e4 | 1715 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 1716 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1717 | } |
e8ca5668 SR |
1718 | |
1719 | /* Find the unit which wrote the status. */ | |
261b5f66 | 1720 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 SR |
1721 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
1722 | if (lu_tmp->ne->nodeid == nodeid && | |
1723 | lu_tmp->status_fifo_addr == addr) { | |
1724 | lu = lu_tmp; | |
1da177e4 LT |
1725 | break; |
1726 | } | |
1727 | } | |
261b5f66 SR |
1728 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1729 | ||
138c8af8 SR |
1730 | if (unlikely(!lu)) { |
1731 | SBP2_ERR("lu is NULL - device is gone?"); | |
a237f35f | 1732 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
1733 | } |
1734 | ||
138c8af8 | 1735 | /* Put response into lu status fifo buffer. The first two bytes |
3e98eab4 SR |
1736 | * come in big endian bit order. Often the target writes only a |
1737 | * truncated status block, minimally the first two quadlets. The rest | |
e8ca5668 | 1738 | * is implied to be zeros. */ |
138c8af8 | 1739 | sb = &lu->status_block; |
3e98eab4 SR |
1740 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
1741 | memcpy(sb, data, length); | |
1742 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 | 1743 | |
e8ca5668 | 1744 | /* Ignore unsolicited status. Handle command ORB status. */ |
6065772d | 1745 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
138c8af8 | 1746 | cmd = NULL; |
6065772d | 1747 | else |
138c8af8 SR |
1748 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
1749 | if (cmd) { | |
97d552e3 SR |
1750 | dma_sync_single_for_cpu(hi->host->device.parent, |
1751 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1752 | sizeof(struct sbp2_command_orb), |
1753 | DMA_TO_DEVICE); | |
97d552e3 | 1754 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1755 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1756 | DMA_TO_DEVICE); |
e8ca5668 | 1757 | /* Grab SCSI command pointers and check status. */ |
6065772d SR |
1758 | /* |
1759 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
1760 | * not be reused until status for a subsequent ORB is received. | |
1761 | */ | |
138c8af8 SR |
1762 | SCpnt = cmd->Current_SCpnt; |
1763 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); | |
1764 | sbp2util_mark_command_completed(lu, cmd); | |
1765 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1766 | |
1767 | if (SCpnt) { | |
abbca103 SR |
1768 | u32 h = sb->ORB_offset_hi_misc; |
1769 | u32 r = STATUS_GET_RESP(h); | |
1770 | ||
1771 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
35644090 | 1772 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
abbca103 | 1773 | r, STATUS_GET_SBP_STATUS(h)); |
6065772d | 1774 | scsi_status = |
abbca103 SR |
1775 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
1776 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 1777 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 1778 | } |
e8ca5668 | 1779 | |
edf1fb21 | 1780 | if (STATUS_GET_LEN(h) > 1) |
3e98eab4 SR |
1781 | scsi_status = sbp2_status_to_sense_data( |
1782 | (unchar *)sb, SCpnt->sense_buffer); | |
e8ca5668 | 1783 | |
edf1fb21 | 1784 | if (STATUS_TEST_DEAD(h)) |
138c8af8 | 1785 | sbp2_agent_reset(lu, 0); |
1da177e4 LT |
1786 | } |
1787 | ||
e8ca5668 | 1788 | /* Check here to see if there are no commands in-use. If there |
cc078189 SR |
1789 | * are none, we know that the fetch agent left the active state |
1790 | * _and_ that we did not reactivate it yet. Therefore clear | |
1791 | * last_orb so that next time we write directly to the | |
1792 | * ORB_POINTER register. That way the fetch agent does not need | |
e8ca5668 | 1793 | * to refetch the next_ORB. */ |
138c8af8 SR |
1794 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1795 | if (list_empty(&lu->cmd_orb_inuse)) | |
1796 | lu->last_orb = NULL; | |
1797 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1798 | |
1799 | } else { | |
e8ca5668 | 1800 | /* It's probably status after a management request. */ |
138c8af8 SR |
1801 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
1802 | (sb->ORB_offset_lo == lu->login_orb_dma) || | |
1803 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || | |
1804 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { | |
1805 | lu->access_complete = 1; | |
ca0c7453 | 1806 | wake_up_interruptible(&sbp2_access_wq); |
e8398bb7 | 1807 | } |
1da177e4 LT |
1808 | } |
1809 | ||
edf1fb21 | 1810 | if (SCpnt) |
138c8af8 SR |
1811 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
1812 | cmd->Current_done); | |
a237f35f | 1813 | return RCODE_COMPLETE; |
1da177e4 LT |
1814 | } |
1815 | ||
1da177e4 LT |
1816 | /************************************** |
1817 | * SCSI interface related section | |
1818 | **************************************/ | |
1819 | ||
1da177e4 LT |
1820 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
1821 | void (*done)(struct scsi_cmnd *)) | |
1822 | { | |
138c8af8 | 1823 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
ca0c7453 | 1824 | struct sbp2_fwhost_info *hi; |
abd559b1 | 1825 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 1826 | |
138c8af8 | 1827 | if (unlikely(!sbp2util_node_is_available(lu))) |
abd559b1 | 1828 | goto done; |
1da177e4 | 1829 | |
138c8af8 | 1830 | hi = lu->hi; |
1da177e4 | 1831 | |
5796aa7b | 1832 | if (unlikely(!hi)) { |
ca0c7453 | 1833 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
abd559b1 | 1834 | goto done; |
1da177e4 LT |
1835 | } |
1836 | ||
e8ca5668 SR |
1837 | /* Multiple units are currently represented to the SCSI core as separate |
1838 | * targets, not as one target with multiple LUs. Therefore return | |
1839 | * selection time-out to any IO directed at non-zero LUNs. */ | |
5796aa7b | 1840 | if (unlikely(SCpnt->device->lun)) |
abd559b1 | 1841 | goto done; |
1da177e4 | 1842 | |
138c8af8 | 1843 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
1da177e4 | 1844 | SBP2_ERR("Bus reset in progress - rejecting command"); |
abd559b1 JM |
1845 | result = DID_BUS_BUSY << 16; |
1846 | goto done; | |
1da177e4 LT |
1847 | } |
1848 | ||
e8ca5668 SR |
1849 | /* Bidirectional commands are not yet implemented, |
1850 | * and unknown transfer direction not handled. */ | |
5796aa7b | 1851 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
43863eba SR |
1852 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
1853 | result = DID_ERROR << 16; | |
1854 | goto done; | |
1855 | } | |
1856 | ||
138c8af8 | 1857 | if (sbp2_send_command(lu, SCpnt, done)) { |
1da177e4 | 1858 | SBP2_ERR("Error sending SCSI command"); |
138c8af8 SR |
1859 | sbp2scsi_complete_command(lu, |
1860 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
1da177e4 LT |
1861 | SCpnt, done); |
1862 | } | |
abd559b1 | 1863 | return 0; |
1da177e4 | 1864 | |
abd559b1 JM |
1865 | done: |
1866 | SCpnt->result = result; | |
1867 | done(SCpnt); | |
1868 | return 0; | |
1da177e4 LT |
1869 | } |
1870 | ||
138c8af8 | 1871 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
1da177e4 | 1872 | { |
138c8af8 | 1873 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 | 1874 | struct list_head *lh; |
138c8af8 | 1875 | struct sbp2_command_info *cmd; |
79456197 | 1876 | unsigned long flags; |
1da177e4 | 1877 | |
138c8af8 SR |
1878 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1879 | while (!list_empty(&lu->cmd_orb_inuse)) { | |
1880 | lh = lu->cmd_orb_inuse.next; | |
1881 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
1882 | dma_sync_single_for_cpu(hi->host->device.parent, |
1883 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1884 | sizeof(struct sbp2_command_orb), |
1885 | DMA_TO_DEVICE); | |
97d552e3 | 1886 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1887 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1888 | DMA_TO_DEVICE); |
138c8af8 SR |
1889 | sbp2util_mark_command_completed(lu, cmd); |
1890 | if (cmd->Current_SCpnt) { | |
1891 | cmd->Current_SCpnt->result = status << 16; | |
1892 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
1893 | } |
1894 | } | |
138c8af8 | 1895 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
1896 | |
1897 | return; | |
1898 | } | |
1899 | ||
1900 | /* | |
e8ca5668 | 1901 | * Complete a regular SCSI command. Can be called in atomic context. |
1da177e4 | 1902 | */ |
138c8af8 SR |
1903 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
1904 | struct scsi_cmnd *SCpnt, | |
1da177e4 LT |
1905 | void (*done)(struct scsi_cmnd *)) |
1906 | { | |
1da177e4 LT |
1907 | if (!SCpnt) { |
1908 | SBP2_ERR("SCpnt is NULL"); | |
1909 | return; | |
1910 | } | |
1911 | ||
1da177e4 | 1912 | switch (scsi_status) { |
a237f35f | 1913 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 1914 | SCpnt->result = DID_OK << 16; |
a237f35f | 1915 | break; |
1da177e4 | 1916 | |
a237f35f SR |
1917 | case SBP2_SCSI_STATUS_BUSY: |
1918 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
1919 | SCpnt->result = DID_BUS_BUSY << 16; | |
1920 | break; | |
1da177e4 | 1921 | |
a237f35f | 1922 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
8f0525ff | 1923 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
a237f35f | 1924 | break; |
1da177e4 | 1925 | |
a237f35f SR |
1926 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
1927 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
1928 | SCpnt->result = DID_NO_CONNECT << 16; | |
1929 | scsi_print_command(SCpnt); | |
1930 | break; | |
1da177e4 | 1931 | |
a237f35f SR |
1932 | case SBP2_SCSI_STATUS_CONDITION_MET: |
1933 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
1934 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
1935 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
1936 | SCpnt->result = DID_ERROR << 16; | |
1937 | scsi_print_command(SCpnt); | |
1938 | break; | |
1da177e4 | 1939 | |
a237f35f SR |
1940 | default: |
1941 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
1942 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
1943 | } |
1944 | ||
e8ca5668 SR |
1945 | /* If a bus reset is in progress and there was an error, complete |
1946 | * the command as busy so that it will get retried. */ | |
138c8af8 | 1947 | if (!hpsb_node_entry_valid(lu->ne) |
a237f35f | 1948 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
1da177e4 LT |
1949 | SBP2_ERR("Completing command with busy (bus reset)"); |
1950 | SCpnt->result = DID_BUS_BUSY << 16; | |
1951 | } | |
1952 | ||
e8ca5668 | 1953 | /* Tell the SCSI stack that we're done with this command. */ |
a237f35f | 1954 | done(SCpnt); |
1da177e4 LT |
1955 | } |
1956 | ||
abd559b1 | 1957 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 1958 | { |
138c8af8 | 1959 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
a80614d1 | 1960 | |
138c8af8 | 1961 | lu->sdev = sdev; |
c394f1ea | 1962 | sdev->allow_restart = 1; |
a80614d1 | 1963 | |
465ff318 JB |
1964 | /* |
1965 | * Update the dma alignment (minimum alignment requirements for | |
1966 | * start and end of DMA transfers) to be a sector | |
1967 | */ | |
1968 | blk_queue_update_dma_alignment(sdev->request_queue, 511); | |
1969 | ||
138c8af8 | 1970 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 1971 | sdev->inquiry_len = 36; |
abd559b1 JM |
1972 | return 0; |
1973 | } | |
1974 | ||
abd559b1 JM |
1975 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
1976 | { | |
138c8af8 | 1977 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
24d3bf88 | 1978 | |
365c786f | 1979 | sdev->use_10_for_rw = 1; |
24d3bf88 | 1980 | |
1a74bc68 SR |
1981 | if (sdev->type == TYPE_ROM) |
1982 | sdev->use_10_for_ms = 1; | |
24d3bf88 | 1983 | if (sdev->type == TYPE_DISK && |
138c8af8 | 1984 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
24d3bf88 | 1985 | sdev->skip_ms_page_8 = 1; |
138c8af8 | 1986 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
e9a1c52c | 1987 | sdev->fix_capacity = 1; |
1da177e4 LT |
1988 | return 0; |
1989 | } | |
1990 | ||
abd559b1 JM |
1991 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
1992 | { | |
138c8af8 | 1993 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
abd559b1 JM |
1994 | return; |
1995 | } | |
1996 | ||
1da177e4 | 1997 | /* |
e8ca5668 SR |
1998 | * Called by scsi stack when something has really gone wrong. |
1999 | * Usually called when a command has timed-out for some reason. | |
1da177e4 LT |
2000 | */ |
2001 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2002 | { | |
138c8af8 SR |
2003 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
2004 | struct sbp2_fwhost_info *hi = lu->hi; | |
2005 | struct sbp2_command_info *cmd; | |
24c7cd06 | 2006 | unsigned long flags; |
1da177e4 | 2007 | |
35644090 | 2008 | SBP2_INFO("aborting sbp2 command"); |
1da177e4 LT |
2009 | scsi_print_command(SCpnt); |
2010 | ||
138c8af8 SR |
2011 | if (sbp2util_node_is_available(lu)) { |
2012 | sbp2_agent_reset(lu, 1); | |
1da177e4 | 2013 | |
23077f1d | 2014 | /* Return a matching command structure to the free pool. */ |
138c8af8 SR |
2015 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
2016 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); | |
2017 | if (cmd) { | |
97d552e3 | 2018 | dma_sync_single_for_cpu(hi->host->device.parent, |
138c8af8 SR |
2019 | cmd->command_orb_dma, |
2020 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 2021 | DMA_TO_DEVICE); |
97d552e3 SR |
2022 | dma_sync_single_for_cpu(hi->host->device.parent, |
2023 | cmd->sge_dma, | |
138c8af8 | 2024 | sizeof(cmd->scatter_gather_element), |
2446a79f | 2025 | DMA_TO_DEVICE); |
138c8af8 SR |
2026 | sbp2util_mark_command_completed(lu, cmd); |
2027 | if (cmd->Current_SCpnt) { | |
2028 | cmd->Current_SCpnt->result = DID_ABORT << 16; | |
2029 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
2030 | } |
2031 | } | |
138c8af8 | 2032 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 | 2033 | |
138c8af8 | 2034 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 LT |
2035 | } |
2036 | ||
a237f35f | 2037 | return SUCCESS; |
1da177e4 LT |
2038 | } |
2039 | ||
2040 | /* | |
2041 | * Called by scsi stack when something has really gone wrong. | |
2042 | */ | |
abd559b1 | 2043 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 | 2044 | { |
138c8af8 | 2045 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
1da177e4 | 2046 | |
35644090 | 2047 | SBP2_INFO("reset requested"); |
1da177e4 | 2048 | |
138c8af8 | 2049 | if (sbp2util_node_is_available(lu)) { |
35644090 | 2050 | SBP2_INFO("generating sbp2 fetch agent reset"); |
138c8af8 | 2051 | sbp2_agent_reset(lu, 1); |
1da177e4 LT |
2052 | } |
2053 | ||
abd559b1 | 2054 | return SUCCESS; |
94d0e7b8 JG |
2055 | } |
2056 | ||
a237f35f SR |
2057 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2058 | struct device_attribute *attr, | |
2059 | char *buf) | |
1da177e4 LT |
2060 | { |
2061 | struct scsi_device *sdev; | |
138c8af8 | 2062 | struct sbp2_lu *lu; |
1da177e4 LT |
2063 | |
2064 | if (!(sdev = to_scsi_device(dev))) | |
2065 | return 0; | |
2066 | ||
138c8af8 | 2067 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
1da177e4 LT |
2068 | return 0; |
2069 | ||
d7794c86 SR |
2070 | if (sbp2_long_sysfs_ieee1394_id) |
2071 | return sprintf(buf, "%016Lx:%06x:%04x\n", | |
2072 | (unsigned long long)lu->ne->guid, | |
2073 | lu->ud->directory_id, ORB_SET_LUN(lu->lun)); | |
2074 | else | |
2075 | return sprintf(buf, "%016Lx:%d:%d\n", | |
2076 | (unsigned long long)lu->ne->guid, | |
2077 | lu->ud->id, ORB_SET_LUN(lu->lun)); | |
1da177e4 | 2078 | } |
1da177e4 LT |
2079 | |
2080 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2081 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2082 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2083 | MODULE_LICENSE("GPL"); | |
2084 | ||
1da177e4 LT |
2085 | static int sbp2_module_init(void) |
2086 | { | |
2087 | int ret; | |
2088 | ||
ca0c7453 SR |
2089 | if (sbp2_serialize_io) { |
2090 | sbp2_shost_template.can_queue = 1; | |
2091 | sbp2_shost_template.cmd_per_lun = 1; | |
1da177e4 LT |
2092 | } |
2093 | ||
24d3bf88 | 2094 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
ca0c7453 SR |
2095 | (sbp2_max_sectors * 512) > (128 * 1024)) |
2096 | sbp2_max_sectors = 128 * 1024 / 512; | |
2097 | sbp2_shost_template.max_sectors = sbp2_max_sectors; | |
1da177e4 | 2098 | |
1da177e4 | 2099 | hpsb_register_highlevel(&sbp2_highlevel); |
1da177e4 LT |
2100 | ret = hpsb_register_protocol(&sbp2_driver); |
2101 | if (ret) { | |
2102 | SBP2_ERR("Failed to register protocol"); | |
2103 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2104 | return ret; | |
2105 | } | |
1da177e4 LT |
2106 | return 0; |
2107 | } | |
2108 | ||
2109 | static void __exit sbp2_module_exit(void) | |
2110 | { | |
1da177e4 | 2111 | hpsb_unregister_protocol(&sbp2_driver); |
1da177e4 LT |
2112 | hpsb_unregister_highlevel(&sbp2_highlevel); |
2113 | } | |
2114 | ||
2115 | module_init(sbp2_module_init); | |
2116 | module_exit(sbp2_module_exit); |