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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 | * | |
32 | * You may access any attached SBP-2 storage devices as if they were SCSI | |
33 | * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). | |
34 | * | |
35 | * Current Issues: | |
36 | * | |
37 | * - Error Handling: SCSI aborts and bus reset requests are handled somewhat | |
38 | * but the code needs additional debugging. | |
39 | */ | |
40 | ||
902abed1 SR |
41 | #include <linux/blkdev.h> |
42 | #include <linux/compiler.h> | |
43 | #include <linux/delay.h> | |
44 | #include <linux/device.h> | |
45 | #include <linux/dma-mapping.h> | |
46 | #include <linux/gfp.h> | |
47 | #include <linux/init.h> | |
1da177e4 LT |
48 | #include <linux/kernel.h> |
49 | #include <linux/list.h> | |
1da177e4 LT |
50 | #include <linux/module.h> |
51 | #include <linux/moduleparam.h> | |
1da177e4 | 52 | #include <linux/pci.h> |
902abed1 SR |
53 | #include <linux/slab.h> |
54 | #include <linux/spinlock.h> | |
55 | #include <linux/stat.h> | |
56 | #include <linux/string.h> | |
57 | #include <linux/stringify.h> | |
58 | #include <linux/types.h> | |
e8398bb7 | 59 | #include <linux/wait.h> |
1da177e4 | 60 | |
1da177e4 | 61 | #include <asm/byteorder.h> |
902abed1 SR |
62 | #include <asm/errno.h> |
63 | #include <asm/param.h> | |
1da177e4 | 64 | #include <asm/scatterlist.h> |
902abed1 SR |
65 | #include <asm/system.h> |
66 | #include <asm/types.h> | |
67 | ||
68 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
69 | #include <asm/io.h> /* for bus_to_virt */ | |
70 | #endif | |
1da177e4 LT |
71 | |
72 | #include <scsi/scsi.h> | |
73 | #include <scsi/scsi_cmnd.h> | |
74 | #include <scsi/scsi_dbg.h> | |
75 | #include <scsi/scsi_device.h> | |
76 | #include <scsi/scsi_host.h> | |
77 | ||
78 | #include "csr1212.h" | |
902abed1 SR |
79 | #include "highlevel.h" |
80 | #include "hosts.h" | |
1da177e4 | 81 | #include "ieee1394.h" |
1da177e4 | 82 | #include "ieee1394_core.h" |
902abed1 | 83 | #include "ieee1394_hotplug.h" |
1da177e4 | 84 | #include "ieee1394_transactions.h" |
902abed1 SR |
85 | #include "ieee1394_types.h" |
86 | #include "nodemgr.h" | |
1da177e4 LT |
87 | #include "sbp2.h" |
88 | ||
1da177e4 LT |
89 | /* |
90 | * Module load parameter definitions | |
91 | */ | |
92 | ||
93 | /* | |
94 | * Change max_speed on module load if you have a bad IEEE-1394 | |
95 | * controller that has trouble running 2KB packets at 400mb. | |
96 | * | |
97 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
98 | * (probably due to PCI latency/throughput issues with the part). You can | |
99 | * bump down the speed if you are running into problems. | |
100 | */ | |
ca0c7453 SR |
101 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
102 | module_param_named(max_speed, sbp2_max_speed, int, 0644); | |
28b06679 SR |
103 | MODULE_PARM_DESC(max_speed, "Force max speed " |
104 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); | |
1da177e4 LT |
105 | |
106 | /* | |
107 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
108 | * down to us at a time (debugging). This might be necessary for very | |
109 | * badly behaved sbp2 devices. | |
2bab359a JM |
110 | * |
111 | * TODO: Make this configurable per device. | |
1da177e4 | 112 | */ |
ca0c7453 SR |
113 | static int sbp2_serialize_io = 1; |
114 | module_param_named(serialize_io, sbp2_serialize_io, int, 0444); | |
115 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers " | |
116 | "(default = 1, faster = 0)"); | |
1da177e4 LT |
117 | |
118 | /* | |
119 | * Bump up max_sectors if you'd like to support very large sized | |
120 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
121 | * transfers greater or equal to 128KB. Default is a value of 255 | |
122 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
123 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
124 | * transfer sizes. | |
125 | */ | |
ca0c7453 SR |
126 | static int sbp2_max_sectors = SBP2_MAX_SECTORS; |
127 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); | |
128 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " | |
129 | "(default = " __stringify(SBP2_MAX_SECTORS) ")"); | |
1da177e4 LT |
130 | |
131 | /* | |
132 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
133 | * do an exclusive login, as it's generally unsafe to have two hosts | |
134 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
135 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
136 | * and you're either running read-only filesystems or some sort of special | |
20f45781 BC |
137 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
138 | * File System, or Lustre, then set exclusive_login to zero. | |
139 | * | |
140 | * So far only bridges from Oxford Semiconductor are known to support | |
141 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
142 | * are possible on OXFW911 and newer Oxsemi bridges. | |
1da177e4 | 143 | */ |
ca0c7453 SR |
144 | static int sbp2_exclusive_login = 1; |
145 | module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644); | |
146 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
147 | "(default = 1)"); | |
1da177e4 LT |
148 | |
149 | /* | |
24d3bf88 SR |
150 | * If any of the following workarounds is required for your device to work, |
151 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
152 | * mailing list. | |
1da177e4 | 153 | * |
24d3bf88 SR |
154 | * - 128kB max transfer |
155 | * Limit transfer size. Necessary for some old bridges. | |
156 | * | |
157 | * - 36 byte inquiry | |
158 | * When scsi_mod probes the device, let the inquiry command look like that | |
159 | * from MS Windows. | |
160 | * | |
161 | * - skip mode page 8 | |
162 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
163 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
e9a1c52c SR |
164 | * |
165 | * - fix capacity | |
166 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
167 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
168 | * Don't use this with devices which don't have this bug. | |
679c0cd2 SR |
169 | * |
170 | * - override internal blacklist | |
171 | * Instead of adding to the built-in blacklist, use only the workarounds | |
172 | * specified in the module load parameter. | |
173 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 174 | */ |
24d3bf88 SR |
175 | static int sbp2_default_workarounds; |
176 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
177 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
178 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
179 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
180 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 181 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
679c0cd2 | 182 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
183 | ", or a combination)"); |
184 | ||
1da177e4 | 185 | |
edf1fb21 SR |
186 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
187 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
1da177e4 | 188 | |
1da177e4 LT |
189 | /* |
190 | * Globals | |
191 | */ | |
ea42ea0f SR |
192 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *, u32); |
193 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *, u32, | |
194 | struct scsi_cmnd *, | |
195 | void (*)(struct scsi_cmnd *)); | |
196 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *); | |
197 | static int sbp2_start_device(struct scsi_id_instance_data *); | |
198 | static void sbp2_remove_device(struct scsi_id_instance_data *); | |
199 | static int sbp2_login_device(struct scsi_id_instance_data *); | |
200 | static int sbp2_reconnect_device(struct scsi_id_instance_data *); | |
201 | static int sbp2_logout_device(struct scsi_id_instance_data *); | |
202 | static void sbp2_host_reset(struct hpsb_host *); | |
203 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, | |
204 | u64, size_t, u16); | |
205 | static int sbp2_agent_reset(struct scsi_id_instance_data *, int); | |
206 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *, | |
207 | struct unit_directory *); | |
208 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *); | |
209 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *); | |
1da177e4 | 210 | |
1da177e4 LT |
211 | |
212 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
213 | ||
1da177e4 | 214 | static struct hpsb_highlevel sbp2_highlevel = { |
ea42ea0f SR |
215 | .name = SBP2_DEVICE_NAME, |
216 | .host_reset = sbp2_host_reset, | |
1da177e4 LT |
217 | }; |
218 | ||
219 | static struct hpsb_address_ops sbp2_ops = { | |
ea42ea0f | 220 | .write = sbp2_handle_status_write |
1da177e4 LT |
221 | }; |
222 | ||
223 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
ea42ea0f SR |
224 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
225 | u64, size_t, u16); | |
226 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, | |
227 | size_t, u16); | |
228 | ||
1da177e4 | 229 | static struct hpsb_address_ops sbp2_physdma_ops = { |
ea42ea0f SR |
230 | .read = sbp2_handle_physdma_read, |
231 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
232 | }; |
233 | #endif | |
234 | ||
ea42ea0f SR |
235 | |
236 | /* | |
237 | * Interface to driver core and IEEE 1394 core | |
238 | */ | |
239 | static struct ieee1394_device_id sbp2_id_table[] = { | |
240 | { | |
241 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, | |
242 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
243 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
244 | {} | |
245 | }; | |
246 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
247 | ||
248 | static int sbp2_probe(struct device *); | |
249 | static int sbp2_remove(struct device *); | |
250 | static int sbp2_update(struct unit_directory *); | |
251 | ||
1da177e4 LT |
252 | static struct hpsb_protocol_driver sbp2_driver = { |
253 | .name = "SBP2 Driver", | |
254 | .id_table = sbp2_id_table, | |
255 | .update = sbp2_update, | |
256 | .driver = { | |
257 | .name = SBP2_DEVICE_NAME, | |
258 | .bus = &ieee1394_bus_type, | |
259 | .probe = sbp2_probe, | |
260 | .remove = sbp2_remove, | |
261 | }, | |
262 | }; | |
263 | ||
ea42ea0f SR |
264 | |
265 | /* | |
266 | * Interface to SCSI core | |
267 | */ | |
268 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, | |
269 | void (*)(struct scsi_cmnd *)); | |
270 | static int sbp2scsi_abort(struct scsi_cmnd *); | |
271 | static int sbp2scsi_reset(struct scsi_cmnd *); | |
272 | static int sbp2scsi_slave_alloc(struct scsi_device *); | |
273 | static int sbp2scsi_slave_configure(struct scsi_device *); | |
274 | static void sbp2scsi_slave_destroy(struct scsi_device *); | |
275 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, | |
276 | struct device_attribute *, char *); | |
277 | ||
278 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
279 | ||
280 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
281 | &dev_attr_ieee1394_id, | |
282 | NULL | |
283 | }; | |
284 | ||
ca0c7453 | 285 | static struct scsi_host_template sbp2_shost_template = { |
ea42ea0f SR |
286 | .module = THIS_MODULE, |
287 | .name = "SBP-2 IEEE-1394", | |
288 | .proc_name = SBP2_DEVICE_NAME, | |
289 | .queuecommand = sbp2scsi_queuecommand, | |
290 | .eh_abort_handler = sbp2scsi_abort, | |
291 | .eh_device_reset_handler = sbp2scsi_reset, | |
292 | .slave_alloc = sbp2scsi_slave_alloc, | |
293 | .slave_configure = sbp2scsi_slave_configure, | |
294 | .slave_destroy = sbp2scsi_slave_destroy, | |
295 | .this_id = -1, | |
296 | .sg_tablesize = SG_ALL, | |
297 | .use_clustering = ENABLE_CLUSTERING, | |
298 | .cmd_per_lun = SBP2_MAX_CMDS, | |
299 | .can_queue = SBP2_MAX_CMDS, | |
300 | .emulated = 1, | |
301 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
302 | }; | |
303 | ||
304 | ||
a80614d1 | 305 | /* |
24d3bf88 SR |
306 | * List of devices with known bugs. |
307 | * | |
308 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
309 | * for the type of bridge chip of a device. It yields a few false positives | |
310 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 311 | */ |
24d3bf88 SR |
312 | static const struct { |
313 | u32 firmware_revision; | |
e9a1c52c | 314 | u32 model_id; |
24d3bf88 SR |
315 | unsigned workarounds; |
316 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 317 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 318 | .firmware_revision = 0x002800, |
4b9a3347 | 319 | .model_id = 0x001010, |
24d3bf88 SR |
320 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
321 | SBP2_WORKAROUND_MODE_SENSE_8, | |
322 | }, | |
323 | /* Initio bridges, actually only needed for some older ones */ { | |
324 | .firmware_revision = 0x000200, | |
325 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
326 | }, | |
327 | /* Symbios bridge */ { | |
328 | .firmware_revision = 0xa0b800, | |
329 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
e9a1c52c SR |
330 | }, |
331 | /* | |
332 | * Note about the following Apple iPod blacklist entries: | |
333 | * | |
334 | * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our | |
335 | * matching logic treats 0 as a wildcard, we cannot match this ID | |
336 | * without rewriting the matching routine. Fortunately these iPods | |
337 | * do not feature the read_capacity bug according to one report. | |
338 | * Read_capacity behaviour as well as model_id could change due to | |
339 | * Apple-supplied firmware updates though. | |
340 | */ | |
341 | /* iPod 4th generation */ { | |
342 | .firmware_revision = 0x0a2700, | |
343 | .model_id = 0x000021, | |
344 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
345 | }, | |
346 | /* iPod mini */ { | |
347 | .firmware_revision = 0x0a2700, | |
348 | .model_id = 0x000023, | |
349 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
350 | }, | |
351 | /* iPod Photo */ { | |
352 | .firmware_revision = 0x0a2700, | |
353 | .model_id = 0x00007e, | |
354 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 355 | } |
1da177e4 LT |
356 | }; |
357 | ||
1da177e4 LT |
358 | /************************************** |
359 | * General utility functions | |
360 | **************************************/ | |
361 | ||
1da177e4 LT |
362 | #ifndef __BIG_ENDIAN |
363 | /* | |
364 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
365 | */ | |
2b01b80b | 366 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
367 | { |
368 | u32 *temp = buffer; | |
369 | ||
370 | for (length = (length >> 2); length--; ) | |
371 | temp[length] = be32_to_cpu(temp[length]); | |
372 | ||
373 | return; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
378 | */ | |
2b01b80b | 379 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
380 | { |
381 | u32 *temp = buffer; | |
382 | ||
383 | for (length = (length >> 2); length--; ) | |
384 | temp[length] = cpu_to_be32(temp[length]); | |
385 | ||
386 | return; | |
387 | } | |
388 | #else /* BIG_ENDIAN */ | |
389 | /* Why waste the cpu cycles? */ | |
611aa19f SR |
390 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
391 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
392 | #endif |
393 | ||
ca0c7453 | 394 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
e8398bb7 | 395 | |
1da177e4 | 396 | /* |
e8398bb7 SR |
397 | * Waits for completion of an SBP-2 access request. |
398 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 399 | */ |
e8398bb7 SR |
400 | static int sbp2util_access_timeout(struct scsi_id_instance_data *scsi_id, |
401 | int timeout) | |
1da177e4 | 402 | { |
ca0c7453 | 403 | long leftover; |
1da177e4 | 404 | |
ca0c7453 SR |
405 | leftover = wait_event_interruptible_timeout( |
406 | sbp2_access_wq, scsi_id->access_complete, timeout); | |
e8398bb7 SR |
407 | scsi_id->access_complete = 0; |
408 | return leftover <= 0; | |
1da177e4 LT |
409 | } |
410 | ||
1da177e4 LT |
411 | static void sbp2_free_packet(struct hpsb_packet *packet) |
412 | { | |
413 | hpsb_free_tlabel(packet); | |
414 | hpsb_free_packet(packet); | |
415 | } | |
416 | ||
e8ca5668 SR |
417 | /* |
418 | * This is much like hpsb_node_write(), except it ignores the response | |
419 | * subaction and returns immediately. Can be used from atomic context. | |
1da177e4 LT |
420 | */ |
421 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 422 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
423 | { |
424 | struct hpsb_packet *packet; | |
425 | ||
426 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
427 | addr, buffer, length); | |
a237f35f SR |
428 | if (!packet) |
429 | return -ENOMEM; | |
1da177e4 | 430 | |
a237f35f SR |
431 | hpsb_set_packet_complete_task(packet, |
432 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
433 | packet); |
434 | ||
435 | hpsb_node_fill_packet(ne, packet); | |
436 | ||
a237f35f | 437 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
438 | sbp2_free_packet(packet); |
439 | return -EIO; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
09ee67ab SR |
445 | static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, |
446 | u64 offset, quadlet_t *data, size_t len) | |
447 | { | |
448 | /* | |
449 | * There is a small window after a bus reset within which the node | |
450 | * entry's generation is current but the reconnect wasn't completed. | |
451 | */ | |
2cccbb55 | 452 | if (unlikely(atomic_read(&scsi_id->state) == SBP2LU_STATE_IN_RESET)) |
09ee67ab SR |
453 | return; |
454 | ||
455 | if (hpsb_node_write(scsi_id->ne, | |
ca0c7453 | 456 | scsi_id->command_block_agent_addr + offset, |
09ee67ab SR |
457 | data, len)) |
458 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
459 | /* | |
460 | * Now accept new SCSI commands, unless a bus reset happended during | |
461 | * hpsb_node_write. | |
462 | */ | |
2cccbb55 | 463 | if (likely(atomic_read(&scsi_id->state) != SBP2LU_STATE_IN_RESET)) |
09ee67ab SR |
464 | scsi_unblock_requests(scsi_id->scsi_host); |
465 | } | |
466 | ||
c4028958 | 467 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
09ee67ab SR |
468 | { |
469 | quadlet_t data[2]; | |
470 | ||
d19c7764 SR |
471 | data[0] = ORB_SET_NODE_ID( |
472 | (container_of(work, struct scsi_id_instance_data, protocol_work))->hi->host->node_id); | |
473 | data[1] = (container_of(work, struct scsi_id_instance_data, protocol_work))->last_orb_dma; | |
09ee67ab | 474 | sbp2util_cpu_to_be32_buffer(data, 8); |
d19c7764 | 475 | sbp2util_notify_fetch_agent(container_of(work, struct scsi_id_instance_data, protocol_work), SBP2_ORB_POINTER_OFFSET, data, 8); |
09ee67ab SR |
476 | } |
477 | ||
c4028958 | 478 | static void sbp2util_write_doorbell(struct work_struct *work) |
09ee67ab | 479 | { |
d19c7764 | 480 | sbp2util_notify_fetch_agent(container_of(work, struct scsi_id_instance_data, protocol_work), SBP2_DOORBELL_OFFSET, NULL, 4); |
09ee67ab SR |
481 | } |
482 | ||
1da177e4 LT |
483 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
484 | { | |
ca0c7453 | 485 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
486 | int i; |
487 | unsigned long flags, orbs; | |
488 | struct sbp2_command_info *command; | |
489 | ||
ca0c7453 | 490 | orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
1da177e4 | 491 | |
ca0c7453 | 492 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 493 | for (i = 0; i < orbs; i++) { |
8551158a | 494 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 495 | if (!command) { |
ca0c7453 | 496 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, |
a237f35f SR |
497 | flags); |
498 | return -ENOMEM; | |
1da177e4 | 499 | } |
1da177e4 | 500 | command->command_orb_dma = |
a237f35f SR |
501 | pci_map_single(hi->host->pdev, &command->command_orb, |
502 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 503 | PCI_DMA_TODEVICE); |
1da177e4 | 504 | command->sge_dma = |
a237f35f SR |
505 | pci_map_single(hi->host->pdev, |
506 | &command->scatter_gather_element, | |
507 | sizeof(command->scatter_gather_element), | |
508 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 | 509 | INIT_LIST_HEAD(&command->list); |
ca0c7453 | 510 | list_add_tail(&command->list, &scsi_id->cmd_orb_completed); |
1da177e4 | 511 | } |
ca0c7453 | 512 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
513 | return 0; |
514 | } | |
515 | ||
1da177e4 LT |
516 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
517 | { | |
518 | struct hpsb_host *host = scsi_id->hi->host; | |
519 | struct list_head *lh, *next; | |
520 | struct sbp2_command_info *command; | |
521 | unsigned long flags; | |
522 | ||
ca0c7453 SR |
523 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
524 | if (!list_empty(&scsi_id->cmd_orb_completed)) { | |
525 | list_for_each_safe(lh, next, &scsi_id->cmd_orb_completed) { | |
1da177e4 | 526 | command = list_entry(lh, struct sbp2_command_info, list); |
1da177e4 LT |
527 | pci_unmap_single(host->pdev, command->command_orb_dma, |
528 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 529 | PCI_DMA_TODEVICE); |
1da177e4 LT |
530 | pci_unmap_single(host->pdev, command->sge_dma, |
531 | sizeof(command->scatter_gather_element), | |
532 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
533 | kfree(command); |
534 | } | |
535 | } | |
ca0c7453 | 536 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
537 | return; |
538 | } | |
539 | ||
540 | /* | |
e8ca5668 SR |
541 | * Finds the sbp2_command for a given outstanding command ORB. |
542 | * Only looks at the in-use list. | |
1da177e4 LT |
543 | */ |
544 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
545 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
546 | { | |
547 | struct sbp2_command_info *command; | |
548 | unsigned long flags; | |
549 | ||
ca0c7453 SR |
550 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
551 | if (!list_empty(&scsi_id->cmd_orb_inuse)) { | |
552 | list_for_each_entry(command, &scsi_id->cmd_orb_inuse, list) { | |
1da177e4 | 553 | if (command->command_orb_dma == orb) { |
ca0c7453 | 554 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
a237f35f | 555 | return command; |
1da177e4 LT |
556 | } |
557 | } | |
558 | } | |
ca0c7453 | 559 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
a237f35f | 560 | return NULL; |
1da177e4 LT |
561 | } |
562 | ||
563 | /* | |
e8ca5668 SR |
564 | * Finds the sbp2_command for a given outstanding SCpnt. |
565 | * Only looks at the in-use list. | |
ca0c7453 | 566 | * Must be called with scsi_id->cmd_orb_lock held. |
1da177e4 | 567 | */ |
24c7cd06 SR |
568 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
569 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
570 | { |
571 | struct sbp2_command_info *command; | |
1da177e4 | 572 | |
ca0c7453 SR |
573 | if (!list_empty(&scsi_id->cmd_orb_inuse)) |
574 | list_for_each_entry(command, &scsi_id->cmd_orb_inuse, list) | |
24c7cd06 | 575 | if (command->Current_SCpnt == SCpnt) |
a237f35f | 576 | return command; |
a237f35f | 577 | return NULL; |
1da177e4 LT |
578 | } |
579 | ||
1da177e4 LT |
580 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
581 | struct scsi_id_instance_data *scsi_id, | |
582 | struct scsi_cmnd *Current_SCpnt, | |
583 | void (*Current_done)(struct scsi_cmnd *)) | |
584 | { | |
585 | struct list_head *lh; | |
586 | struct sbp2_command_info *command = NULL; | |
587 | unsigned long flags; | |
588 | ||
ca0c7453 SR |
589 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
590 | if (!list_empty(&scsi_id->cmd_orb_completed)) { | |
591 | lh = scsi_id->cmd_orb_completed.next; | |
1da177e4 LT |
592 | list_del(lh); |
593 | command = list_entry(lh, struct sbp2_command_info, list); | |
594 | command->Current_done = Current_done; | |
595 | command->Current_SCpnt = Current_SCpnt; | |
ca0c7453 | 596 | list_add_tail(&command->list, &scsi_id->cmd_orb_inuse); |
1da177e4 | 597 | } else { |
d024ebc6 | 598 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 | 599 | } |
ca0c7453 | 600 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
a237f35f | 601 | return command; |
1da177e4 LT |
602 | } |
603 | ||
1da177e4 LT |
604 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) |
605 | { | |
606 | struct scsi_id_instance_data *scsi_id = | |
607 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
608 | struct hpsb_host *host; | |
609 | ||
610 | if (!scsi_id) { | |
d024ebc6 | 611 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
612 | return; |
613 | } | |
614 | ||
615 | host = scsi_id->ud->ne->host; | |
616 | ||
617 | if (command->cmd_dma) { | |
edf1fb21 | 618 | if (command->dma_type == CMD_DMA_SINGLE) |
1da177e4 LT |
619 | pci_unmap_single(host->pdev, command->cmd_dma, |
620 | command->dma_size, command->dma_dir); | |
edf1fb21 | 621 | else if (command->dma_type == CMD_DMA_PAGE) |
1da177e4 LT |
622 | pci_unmap_page(host->pdev, command->cmd_dma, |
623 | command->dma_size, command->dma_dir); | |
edf1fb21 | 624 | /* XXX: Check for CMD_DMA_NONE bug */ |
1da177e4 LT |
625 | command->dma_type = CMD_DMA_NONE; |
626 | command->cmd_dma = 0; | |
627 | } | |
628 | ||
629 | if (command->sge_buffer) { | |
630 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
631 | command->dma_size, command->dma_dir); | |
1da177e4 LT |
632 | command->sge_buffer = NULL; |
633 | } | |
634 | } | |
635 | ||
636 | /* | |
637 | * This function moves a command to the completed orb list. | |
ca0c7453 | 638 | * Must be called with scsi_id->cmd_orb_lock held. |
1da177e4 | 639 | */ |
24c7cd06 SR |
640 | static void sbp2util_mark_command_completed( |
641 | struct scsi_id_instance_data *scsi_id, | |
642 | struct sbp2_command_info *command) | |
1da177e4 | 643 | { |
1da177e4 LT |
644 | list_del(&command->list); |
645 | sbp2util_free_command_dma(command); | |
ca0c7453 | 646 | list_add_tail(&command->list, &scsi_id->cmd_orb_completed); |
1da177e4 LT |
647 | } |
648 | ||
abd559b1 JM |
649 | /* |
650 | * Is scsi_id valid? Is the 1394 node still present? | |
651 | */ | |
652 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
653 | { | |
654 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
655 | } | |
656 | ||
1da177e4 LT |
657 | /********************************************* |
658 | * IEEE-1394 core driver stack related section | |
659 | *********************************************/ | |
1da177e4 LT |
660 | |
661 | static int sbp2_probe(struct device *dev) | |
662 | { | |
663 | struct unit_directory *ud; | |
664 | struct scsi_id_instance_data *scsi_id; | |
665 | ||
1da177e4 LT |
666 | ud = container_of(dev, struct unit_directory, device); |
667 | ||
668 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
669 | * instead. */ | |
670 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
671 | return -ENODEV; | |
672 | ||
a237f35f | 673 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 674 | |
a237f35f SR |
675 | if (!scsi_id) |
676 | return -ENOMEM; | |
1da177e4 | 677 | |
a237f35f | 678 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 679 | |
a237f35f | 680 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
681 | } |
682 | ||
683 | static int sbp2_remove(struct device *dev) | |
684 | { | |
685 | struct unit_directory *ud; | |
686 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 687 | struct scsi_device *sdev; |
1da177e4 | 688 | |
1da177e4 LT |
689 | ud = container_of(dev, struct unit_directory, device); |
690 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
691 | if (!scsi_id) |
692 | return 0; | |
693 | ||
bf637ec3 SR |
694 | if (scsi_id->scsi_host) { |
695 | /* Get rid of enqueued commands if there is no chance to | |
696 | * send them. */ | |
697 | if (!sbp2util_node_is_available(scsi_id)) | |
698 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
e8ca5668 | 699 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
bf637ec3 | 700 | * highlevel drivers which would deadlock if blocked. */ |
2cccbb55 | 701 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN); |
abd559b1 | 702 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 703 | } |
abd559b1 JM |
704 | sdev = scsi_id->sdev; |
705 | if (sdev) { | |
706 | scsi_id->sdev = NULL; | |
707 | scsi_remove_device(sdev); | |
708 | } | |
1da177e4 LT |
709 | |
710 | sbp2_logout_device(scsi_id); | |
711 | sbp2_remove_device(scsi_id); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int sbp2_update(struct unit_directory *ud) | |
717 | { | |
718 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
719 | ||
1da177e4 | 720 | if (sbp2_reconnect_device(scsi_id)) { |
e8ca5668 SR |
721 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
722 | * enough. Try a regular login, but first log out just in | |
723 | * case of any weirdness. */ | |
1da177e4 LT |
724 | sbp2_logout_device(scsi_id); |
725 | ||
726 | if (sbp2_login_device(scsi_id)) { | |
727 | /* Login failed too, just fail, and the backend | |
728 | * will call our sbp2_remove for us */ | |
729 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
730 | return -EBUSY; | |
731 | } | |
732 | } | |
733 | ||
1da177e4 | 734 | sbp2_set_busy_timeout(scsi_id); |
1da177e4 | 735 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
736 | sbp2_max_speed_and_size(scsi_id); |
737 | ||
e8ca5668 SR |
738 | /* Complete any pending commands with busy (so they get retried) |
739 | * and remove them from our queue. */ | |
1da177e4 LT |
740 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
741 | ||
4fc383c0 SR |
742 | /* Accept new commands unless there was another bus reset in the |
743 | * meantime. */ | |
744 | if (hpsb_node_entry_valid(scsi_id->ne)) { | |
2cccbb55 | 745 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
4fc383c0 SR |
746 | scsi_unblock_requests(scsi_id->scsi_host); |
747 | } | |
1da177e4 LT |
748 | return 0; |
749 | } | |
750 | ||
1da177e4 LT |
751 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) |
752 | { | |
ca0c7453 | 753 | struct sbp2_fwhost_info *hi; |
1da177e4 LT |
754 | struct Scsi_Host *scsi_host = NULL; |
755 | struct scsi_id_instance_data *scsi_id = NULL; | |
756 | ||
8551158a | 757 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
758 | if (!scsi_id) { |
759 | SBP2_ERR("failed to create scsi_id"); | |
760 | goto failed_alloc; | |
761 | } | |
1da177e4 LT |
762 | |
763 | scsi_id->ne = ud->ne; | |
764 | scsi_id->ud = ud; | |
765 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
766 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
6737231e | 767 | scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
ca0c7453 SR |
768 | INIT_LIST_HEAD(&scsi_id->cmd_orb_inuse); |
769 | INIT_LIST_HEAD(&scsi_id->cmd_orb_completed); | |
1da177e4 | 770 | INIT_LIST_HEAD(&scsi_id->scsi_list); |
ca0c7453 | 771 | spin_lock_init(&scsi_id->cmd_orb_lock); |
2cccbb55 | 772 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
d19c7764 | 773 | INIT_WORK(&scsi_id->protocol_work, NULL); |
1da177e4 LT |
774 | |
775 | ud->device.driver_data = scsi_id; | |
776 | ||
777 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
778 | if (!hi) { | |
779 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
780 | if (!hi) { | |
781 | SBP2_ERR("failed to allocate hostinfo"); | |
782 | goto failed_alloc; | |
783 | } | |
1da177e4 LT |
784 | hi->host = ud->ne->host; |
785 | INIT_LIST_HEAD(&hi->scsi_ids); | |
786 | ||
1da177e4 LT |
787 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
788 | /* Handle data movement if physical dma is not | |
55664051 SR |
789 | * enabled or not supported on host controller */ |
790 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
791 | &sbp2_physdma_ops, | |
792 | 0x0ULL, 0xfffffffcULL)) { | |
793 | SBP2_ERR("failed to register lower 4GB address range"); | |
794 | goto failed_alloc; | |
795 | } | |
1da177e4 LT |
796 | #endif |
797 | } | |
798 | ||
147830f2 SR |
799 | /* Prevent unloading of the 1394 host */ |
800 | if (!try_module_get(hi->host->driver->owner)) { | |
801 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
802 | goto failed_alloc; | |
803 | } | |
804 | ||
1da177e4 LT |
805 | scsi_id->hi = hi; |
806 | ||
807 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
808 | ||
35bdddb8 SR |
809 | /* Register the status FIFO address range. We could use the same FIFO |
810 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
811 | * target in order to support multi-unit devices. |
812 | * The FIFO is located out of the local host controller's physical range | |
813 | * but, if possible, within the posted write area. Status writes will | |
814 | * then be performed as unified transactions. This slightly reduces | |
815 | * bandwidth usage, and some Prolific based devices seem to require it. | |
816 | */ | |
35bdddb8 SR |
817 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
818 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
819 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 820 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
6737231e | 821 | if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
822 | SBP2_ERR("failed to allocate status FIFO address range"); |
823 | goto failed_alloc; | |
824 | } | |
825 | ||
ca0c7453 | 826 | scsi_host = scsi_host_alloc(&sbp2_shost_template, |
a237f35f | 827 | sizeof(unsigned long)); |
1da177e4 LT |
828 | if (!scsi_host) { |
829 | SBP2_ERR("failed to register scsi host"); | |
830 | goto failed_alloc; | |
831 | } | |
832 | ||
833 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
834 | ||
835 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
836 | scsi_id->scsi_host = scsi_host; | |
837 | return scsi_id; | |
838 | } | |
839 | ||
840 | SBP2_ERR("failed to add scsi host"); | |
841 | scsi_host_put(scsi_host); | |
842 | ||
843 | failed_alloc: | |
844 | sbp2_remove_device(scsi_id); | |
845 | return NULL; | |
846 | } | |
847 | ||
1da177e4 LT |
848 | static void sbp2_host_reset(struct hpsb_host *host) |
849 | { | |
ca0c7453 | 850 | struct sbp2_fwhost_info *hi; |
1da177e4 LT |
851 | struct scsi_id_instance_data *scsi_id; |
852 | ||
853 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
854 | if (!hi) |
855 | return; | |
856 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
857 | if (likely(atomic_read(&scsi_id->state) != | |
858 | SBP2LU_STATE_IN_SHUTDOWN)) { | |
859 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET); | |
1da177e4 | 860 | scsi_block_requests(scsi_id->scsi_host); |
09ee67ab | 861 | } |
1da177e4 LT |
862 | } |
863 | ||
1da177e4 LT |
864 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) |
865 | { | |
ca0c7453 | 866 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
146f7262 | 867 | int error; |
1da177e4 | 868 | |
1da177e4 | 869 | scsi_id->login_response = |
a237f35f SR |
870 | pci_alloc_consistent(hi->host->pdev, |
871 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
872 | &scsi_id->login_response_dma); |
873 | if (!scsi_id->login_response) | |
874 | goto alloc_fail; | |
1da177e4 | 875 | |
1da177e4 | 876 | scsi_id->query_logins_orb = |
a237f35f SR |
877 | pci_alloc_consistent(hi->host->pdev, |
878 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
879 | &scsi_id->query_logins_orb_dma); |
880 | if (!scsi_id->query_logins_orb) | |
881 | goto alloc_fail; | |
1da177e4 | 882 | |
1da177e4 | 883 | scsi_id->query_logins_response = |
a237f35f SR |
884 | pci_alloc_consistent(hi->host->pdev, |
885 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
886 | &scsi_id->query_logins_response_dma); |
887 | if (!scsi_id->query_logins_response) | |
888 | goto alloc_fail; | |
1da177e4 | 889 | |
1da177e4 | 890 | scsi_id->reconnect_orb = |
a237f35f SR |
891 | pci_alloc_consistent(hi->host->pdev, |
892 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
893 | &scsi_id->reconnect_orb_dma); |
894 | if (!scsi_id->reconnect_orb) | |
895 | goto alloc_fail; | |
1da177e4 | 896 | |
1da177e4 | 897 | scsi_id->logout_orb = |
a237f35f SR |
898 | pci_alloc_consistent(hi->host->pdev, |
899 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
900 | &scsi_id->logout_orb_dma); |
901 | if (!scsi_id->logout_orb) | |
902 | goto alloc_fail; | |
1da177e4 | 903 | |
1da177e4 | 904 | scsi_id->login_orb = |
a237f35f SR |
905 | pci_alloc_consistent(hi->host->pdev, |
906 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 907 | &scsi_id->login_orb_dma); |
eaceec7f SR |
908 | if (!scsi_id->login_orb) |
909 | goto alloc_fail; | |
1da177e4 | 910 | |
1da177e4 LT |
911 | if (sbp2util_create_command_orb_pool(scsi_id)) { |
912 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
913 | sbp2_remove_device(scsi_id); | |
914 | return -ENOMEM; | |
915 | } | |
916 | ||
e8ca5668 SR |
917 | /* Wait a second before trying to log in. Previously logged in |
918 | * initiators need a chance to reconnect. */ | |
902abed1 | 919 | if (msleep_interruptible(1000)) { |
1da177e4 LT |
920 | sbp2_remove_device(scsi_id); |
921 | return -EINTR; | |
922 | } | |
a237f35f | 923 | |
1da177e4 | 924 | if (sbp2_login_device(scsi_id)) { |
1da177e4 LT |
925 | sbp2_remove_device(scsi_id); |
926 | return -EBUSY; | |
927 | } | |
928 | ||
1da177e4 | 929 | sbp2_set_busy_timeout(scsi_id); |
1da177e4 | 930 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
931 | sbp2_max_speed_and_size(scsi_id); |
932 | ||
146f7262 JB |
933 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
934 | if (error) { | |
1da177e4 | 935 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
936 | sbp2_logout_device(scsi_id); |
937 | sbp2_remove_device(scsi_id); | |
146f7262 | 938 | return error; |
1da177e4 LT |
939 | } |
940 | ||
941 | return 0; | |
eaceec7f SR |
942 | |
943 | alloc_fail: | |
944 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
945 | sbp2_remove_device(scsi_id); | |
946 | return -ENOMEM; | |
1da177e4 LT |
947 | } |
948 | ||
1da177e4 LT |
949 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) |
950 | { | |
ca0c7453 | 951 | struct sbp2_fwhost_info *hi; |
1da177e4 | 952 | |
1da177e4 LT |
953 | if (!scsi_id) |
954 | return; | |
955 | ||
956 | hi = scsi_id->hi; | |
957 | ||
1da177e4 LT |
958 | if (scsi_id->scsi_host) { |
959 | scsi_remove_host(scsi_id->scsi_host); | |
960 | scsi_host_put(scsi_id->scsi_host); | |
961 | } | |
09ee67ab | 962 | flush_scheduled_work(); |
1da177e4 LT |
963 | sbp2util_remove_command_orb_pool(scsi_id); |
964 | ||
965 | list_del(&scsi_id->scsi_list); | |
966 | ||
edf1fb21 | 967 | if (scsi_id->login_response) |
1da177e4 LT |
968 | pci_free_consistent(hi->host->pdev, |
969 | sizeof(struct sbp2_login_response), | |
970 | scsi_id->login_response, | |
971 | scsi_id->login_response_dma); | |
edf1fb21 | 972 | if (scsi_id->login_orb) |
1da177e4 LT |
973 | pci_free_consistent(hi->host->pdev, |
974 | sizeof(struct sbp2_login_orb), | |
975 | scsi_id->login_orb, | |
976 | scsi_id->login_orb_dma); | |
edf1fb21 | 977 | if (scsi_id->reconnect_orb) |
1da177e4 LT |
978 | pci_free_consistent(hi->host->pdev, |
979 | sizeof(struct sbp2_reconnect_orb), | |
980 | scsi_id->reconnect_orb, | |
981 | scsi_id->reconnect_orb_dma); | |
edf1fb21 | 982 | if (scsi_id->logout_orb) |
1da177e4 LT |
983 | pci_free_consistent(hi->host->pdev, |
984 | sizeof(struct sbp2_logout_orb), | |
985 | scsi_id->logout_orb, | |
986 | scsi_id->logout_orb_dma); | |
edf1fb21 | 987 | if (scsi_id->query_logins_orb) |
1da177e4 LT |
988 | pci_free_consistent(hi->host->pdev, |
989 | sizeof(struct sbp2_query_logins_orb), | |
990 | scsi_id->query_logins_orb, | |
991 | scsi_id->query_logins_orb_dma); | |
edf1fb21 | 992 | if (scsi_id->query_logins_response) |
1da177e4 LT |
993 | pci_free_consistent(hi->host->pdev, |
994 | sizeof(struct sbp2_query_logins_response), | |
995 | scsi_id->query_logins_response, | |
996 | scsi_id->query_logins_response_dma); | |
1da177e4 | 997 | |
6737231e | 998 | if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 999 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
6737231e | 1000 | scsi_id->status_fifo_addr); |
35bdddb8 | 1001 | |
1da177e4 LT |
1002 | scsi_id->ud->device.driver_data = NULL; |
1003 | ||
147830f2 SR |
1004 | if (hi) |
1005 | module_put(hi->host->driver->owner); | |
1006 | ||
1da177e4 LT |
1007 | kfree(scsi_id); |
1008 | } | |
1009 | ||
1010 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1011 | /* | |
e8ca5668 SR |
1012 | * Deal with write requests on adapters which do not support physical DMA or |
1013 | * have it switched off. | |
1da177e4 | 1014 | */ |
a237f35f SR |
1015 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1016 | int destid, quadlet_t *data, u64 addr, | |
1017 | size_t length, u16 flags) | |
1da177e4 | 1018 | { |
a237f35f | 1019 | memcpy(bus_to_virt((u32) addr), data, length); |
a237f35f | 1020 | return RCODE_COMPLETE; |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | /* | |
e8ca5668 SR |
1024 | * Deal with read requests on adapters which do not support physical DMA or |
1025 | * have it switched off. | |
1da177e4 | 1026 | */ |
a237f35f SR |
1027 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1028 | quadlet_t *data, u64 addr, size_t length, | |
1029 | u16 flags) | |
1da177e4 | 1030 | { |
a237f35f | 1031 | memcpy(data, bus_to_virt((u32) addr), length); |
a237f35f | 1032 | return RCODE_COMPLETE; |
1da177e4 LT |
1033 | } |
1034 | #endif | |
1035 | ||
1da177e4 LT |
1036 | /************************************** |
1037 | * SBP-2 protocol related section | |
1038 | **************************************/ | |
1039 | ||
1da177e4 LT |
1040 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) |
1041 | { | |
ca0c7453 | 1042 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
1043 | quadlet_t data[2]; |
1044 | int max_logins; | |
1045 | int active_logins; | |
1046 | ||
1da177e4 LT |
1047 | scsi_id->query_logins_orb->reserved1 = 0x0; |
1048 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1049 | ||
1050 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1051 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1052 | |
1053 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1054 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
ca0c7453 | 1055 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->lun); |
1da177e4 LT |
1056 | |
1057 | scsi_id->query_logins_orb->reserved_resp_length = | |
1058 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1059 | |
35bdddb8 SR |
1060 | scsi_id->query_logins_orb->status_fifo_hi = |
1061 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1062 | scsi_id->query_logins_orb->status_fifo_lo = | |
1063 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1064 | |
1065 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1066 | ||
1da177e4 | 1067 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); |
1da177e4 | 1068 | |
1da177e4 LT |
1069 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1070 | data[1] = scsi_id->query_logins_orb_dma; | |
1071 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1072 | ||
ca0c7453 | 1073 | hpsb_node_write(scsi_id->ne, scsi_id->management_agent_addr, data, 8); |
1da177e4 | 1074 | |
e8398bb7 | 1075 | if (sbp2util_access_timeout(scsi_id, 2*HZ)) { |
1da177e4 | 1076 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1077 | return -EIO; |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1081 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1082 | return -EIO; |
1da177e4 LT |
1083 | } |
1084 | ||
6065772d SR |
1085 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1086 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); | |
a237f35f | 1087 | return -EIO; |
1da177e4 LT |
1088 | } |
1089 | ||
1090 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1091 | ||
1da177e4 | 1092 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
20f45781 | 1093 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 LT |
1094 | |
1095 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
20f45781 | 1096 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1097 | |
1098 | if (active_logins >= max_logins) { | |
a237f35f | 1099 | return -EIO; |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1da177e4 LT |
1105 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) |
1106 | { | |
ca0c7453 | 1107 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
1108 | quadlet_t data[2]; |
1109 | ||
edf1fb21 | 1110 | if (!scsi_id->login_orb) |
a237f35f | 1111 | return -EIO; |
1da177e4 | 1112 | |
ca0c7453 SR |
1113 | if (!sbp2_exclusive_login && sbp2_query_logins(scsi_id)) { |
1114 | SBP2_INFO("Device does not support any more concurrent logins"); | |
1115 | return -EIO; | |
1da177e4 LT |
1116 | } |
1117 | ||
e8ca5668 | 1118 | /* assume no password */ |
1da177e4 LT |
1119 | scsi_id->login_orb->password_hi = 0; |
1120 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1121 | |
1122 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1123 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 | 1124 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
e8ca5668 SR |
1125 | |
1126 | /* one second reconnect time */ | |
1127 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); | |
ca0c7453 | 1128 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); |
e8ca5668 | 1129 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); |
ca0c7453 | 1130 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->lun); |
1da177e4 LT |
1131 | |
1132 | scsi_id->login_orb->passwd_resp_lengths = | |
1133 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1134 | |
35bdddb8 SR |
1135 | scsi_id->login_orb->status_fifo_hi = |
1136 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1137 | scsi_id->login_orb->status_fifo_lo = | |
1138 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1139 | |
1da177e4 LT |
1140 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1141 | ||
1da177e4 | 1142 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1143 | |
1da177e4 LT |
1144 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1145 | data[1] = scsi_id->login_orb_dma; | |
1146 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1147 | ||
ca0c7453 | 1148 | hpsb_node_write(scsi_id->ne, scsi_id->management_agent_addr, data, 8); |
1da177e4 | 1149 | |
e8ca5668 | 1150 | /* wait up to 20 seconds for login status */ |
e8398bb7 SR |
1151 | if (sbp2util_access_timeout(scsi_id, 20*HZ)) { |
1152 | SBP2_ERR("Error logging into SBP-2 device - timed out"); | |
a237f35f | 1153 | return -EIO; |
1da177e4 LT |
1154 | } |
1155 | ||
e8ca5668 | 1156 | /* make sure that the returned status matches the login ORB */ |
1da177e4 | 1157 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { |
6065772d | 1158 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1159 | return -EIO; |
1da177e4 LT |
1160 | } |
1161 | ||
6065772d SR |
1162 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1163 | SBP2_ERR("Error logging into SBP-2 device - failed"); | |
a237f35f | 1164 | return -EIO; |
1da177e4 LT |
1165 | } |
1166 | ||
1da177e4 | 1167 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); |
ca0c7453 | 1168 | scsi_id->command_block_agent_addr = |
1da177e4 | 1169 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; |
ca0c7453 SR |
1170 | scsi_id->command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); |
1171 | scsi_id->command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1da177e4 LT |
1172 | |
1173 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1174 | return 0; |
1da177e4 LT |
1175 | } |
1176 | ||
1da177e4 LT |
1177 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) |
1178 | { | |
ca0c7453 | 1179 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
1180 | quadlet_t data[2]; |
1181 | int error; | |
1182 | ||
1da177e4 LT |
1183 | scsi_id->logout_orb->reserved1 = 0x0; |
1184 | scsi_id->logout_orb->reserved2 = 0x0; | |
1185 | scsi_id->logout_orb->reserved3 = 0x0; | |
1186 | scsi_id->logout_orb->reserved4 = 0x0; | |
1187 | ||
1188 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1189 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1da177e4 LT |
1190 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
1191 | ||
1192 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1193 | scsi_id->logout_orb->status_fifo_hi = |
1194 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1195 | scsi_id->logout_orb->status_fifo_lo = | |
1196 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1197 | |
1da177e4 LT |
1198 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); |
1199 | ||
1da177e4 LT |
1200 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1201 | data[1] = scsi_id->logout_orb_dma; | |
1202 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1203 | ||
1da177e4 | 1204 | error = hpsb_node_write(scsi_id->ne, |
ca0c7453 | 1205 | scsi_id->management_agent_addr, data, 8); |
1da177e4 LT |
1206 | if (error) |
1207 | return error; | |
1208 | ||
e8ca5668 | 1209 | /* wait up to 1 second for the device to complete logout */ |
e8398bb7 | 1210 | if (sbp2util_access_timeout(scsi_id, HZ)) |
1da177e4 LT |
1211 | return -EIO; |
1212 | ||
1213 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1214 | return 0; |
1da177e4 LT |
1215 | } |
1216 | ||
1da177e4 LT |
1217 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) |
1218 | { | |
ca0c7453 | 1219 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
1220 | quadlet_t data[2]; |
1221 | int error; | |
1222 | ||
1da177e4 LT |
1223 | scsi_id->reconnect_orb->reserved1 = 0x0; |
1224 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1225 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1226 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1227 | ||
1228 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1229 | scsi_id->reconnect_orb->login_ID_misc |= | |
1230 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1da177e4 LT |
1231 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
1232 | ||
1233 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1234 | scsi_id->reconnect_orb->status_fifo_hi = |
1235 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1236 | scsi_id->reconnect_orb->status_fifo_lo = | |
1237 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1238 | |
1da177e4 LT |
1239 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); |
1240 | ||
1da177e4 LT |
1241 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1242 | data[1] = scsi_id->reconnect_orb_dma; | |
1243 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1244 | ||
1da177e4 | 1245 | error = hpsb_node_write(scsi_id->ne, |
ca0c7453 | 1246 | scsi_id->management_agent_addr, data, 8); |
1da177e4 LT |
1247 | if (error) |
1248 | return error; | |
1249 | ||
e8ca5668 | 1250 | /* wait up to 1 second for reconnect status */ |
e8398bb7 SR |
1251 | if (sbp2util_access_timeout(scsi_id, HZ)) { |
1252 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); | |
a237f35f | 1253 | return -EIO; |
1da177e4 LT |
1254 | } |
1255 | ||
e8ca5668 | 1256 | /* make sure that the returned status matches the reconnect ORB */ |
1da177e4 | 1257 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { |
6065772d | 1258 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1259 | return -EIO; |
1da177e4 LT |
1260 | } |
1261 | ||
6065772d SR |
1262 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1263 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); | |
a237f35f | 1264 | return -EIO; |
1da177e4 LT |
1265 | } |
1266 | ||
35644090 | 1267 | SBP2_INFO("Reconnected to SBP-2 device"); |
a237f35f | 1268 | return 0; |
1da177e4 LT |
1269 | } |
1270 | ||
1271 | /* | |
e8ca5668 SR |
1272 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
1273 | * behaviour if our node is too busy to accept requests. | |
1da177e4 LT |
1274 | */ |
1275 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1276 | { | |
1277 | quadlet_t data; | |
1278 | ||
1da177e4 | 1279 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1280 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1281 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1282 | return 0; |
1da177e4 LT |
1283 | } |
1284 | ||
1da177e4 LT |
1285 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, |
1286 | struct unit_directory *ud) | |
1287 | { | |
1288 | struct csr1212_keyval *kv; | |
1289 | struct csr1212_dentry *dentry; | |
1290 | u64 management_agent_addr; | |
9117c6dc | 1291 | u32 unit_characteristics, firmware_revision; |
24d3bf88 | 1292 | unsigned workarounds; |
1da177e4 LT |
1293 | int i; |
1294 | ||
9117c6dc SR |
1295 | management_agent_addr = 0; |
1296 | unit_characteristics = 0; | |
1297 | firmware_revision = 0; | |
1da177e4 | 1298 | |
1da177e4 LT |
1299 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
1300 | switch (kv->key.id) { | |
1301 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
edf1fb21 | 1302 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
1da177e4 | 1303 | management_agent_addr = |
a237f35f SR |
1304 | CSR1212_REGISTER_SPACE_BASE + |
1305 | (kv->value.csr_offset << 2); | |
1da177e4 | 1306 | |
edf1fb21 | 1307 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
ca0c7453 | 1308 | scsi_id->lun = |
a237f35f | 1309 | ORB_SET_LUN(kv->value.immediate); |
1da177e4 LT |
1310 | break; |
1311 | ||
1da177e4 | 1312 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
e8ca5668 SR |
1313 | /* FIXME: This is ignored so far. |
1314 | * See SBP-2 clause 7.4.8. */ | |
1da177e4 | 1315 | unit_characteristics = kv->value.immediate; |
1da177e4 LT |
1316 | break; |
1317 | ||
1318 | case SBP2_FIRMWARE_REVISION_KEY: | |
1da177e4 | 1319 | firmware_revision = kv->value.immediate; |
1da177e4 LT |
1320 | break; |
1321 | ||
1322 | default: | |
e8ca5668 SR |
1323 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
1324 | * Its "ordered" bit has consequences for command ORB | |
1325 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ | |
1da177e4 LT |
1326 | break; |
1327 | } | |
1328 | } | |
1329 | ||
24d3bf88 | 1330 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1331 | |
679c0cd2 SR |
1332 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1333 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
1334 | if (sbp2_workarounds_table[i].firmware_revision && | |
1335 | sbp2_workarounds_table[i].firmware_revision != | |
1336 | (firmware_revision & 0xffff00)) | |
1337 | continue; | |
1338 | if (sbp2_workarounds_table[i].model_id && | |
1339 | sbp2_workarounds_table[i].model_id != ud->model_id) | |
1340 | continue; | |
1341 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1342 | break; | |
1343 | } | |
1da177e4 | 1344 | |
24d3bf88 | 1345 | if (workarounds) |
e9a1c52c SR |
1346 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1347 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1348 | " model_id 0x%06x)", | |
24d3bf88 | 1349 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1350 | workarounds, firmware_revision, |
1351 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1352 | ud->model_id); | |
24d3bf88 SR |
1353 | |
1354 | /* We would need one SCSI host template for each target to adjust | |
1355 | * max_sectors on the fly, therefore warn only. */ | |
1356 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
ca0c7453 | 1357 | (sbp2_max_sectors * 512) > (128 * 1024)) |
35644090 | 1358 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
24d3bf88 SR |
1359 | "max transfer size. WARNING: Current max_sectors " |
1360 | "setting is larger than 128KB (%d sectors)", | |
1361 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
ca0c7453 | 1362 | sbp2_max_sectors); |
24d3bf88 | 1363 | |
1da177e4 LT |
1364 | /* If this is a logical unit directory entry, process the parent |
1365 | * to get the values. */ | |
1366 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1367 | struct unit_directory *parent_ud = | |
1368 | container_of(ud->device.parent, struct unit_directory, device); | |
1369 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1370 | } else { | |
ca0c7453 | 1371 | scsi_id->management_agent_addr = management_agent_addr; |
1da177e4 LT |
1372 | scsi_id->workarounds = workarounds; |
1373 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
ca0c7453 | 1374 | scsi_id->lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1375 | } |
1376 | } | |
1377 | ||
fd23ade8 BC |
1378 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1379 | ||
1da177e4 LT |
1380 | /* |
1381 | * This function is called in order to determine the max speed and packet | |
1382 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1383 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1384 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1385 | * device decides the actual maximum data it can transfer. We just tell it | |
1386 | * the speed that it needs to use, and the max_rec the host supports, and | |
1387 | * it takes care of the rest. | |
1388 | */ | |
1389 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1390 | { | |
ca0c7453 | 1391 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
fd23ade8 | 1392 | u8 payload; |
1da177e4 | 1393 | |
a237f35f | 1394 | scsi_id->speed_code = |
647dcb5f | 1395 | hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
1da177e4 | 1396 | |
ca0c7453 SR |
1397 | if (scsi_id->speed_code > sbp2_max_speed) { |
1398 | scsi_id->speed_code = sbp2_max_speed; | |
1399 | SBP2_INFO("Reducing speed to %s", | |
1400 | hpsb_speedto_str[sbp2_max_speed]); | |
1da177e4 LT |
1401 | } |
1402 | ||
1403 | /* Payload size is the lesser of what our speed supports and what | |
1404 | * our host supports. */ | |
fd23ade8 BC |
1405 | payload = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
1406 | (u8) (hi->host->csr.max_rec - 1)); | |
1407 | ||
1408 | /* If physical DMA is off, work around limitation in ohci1394: | |
1409 | * packet size must not exceed PAGE_SIZE */ | |
1410 | if (scsi_id->ne->host->low_addr_space < (1ULL << 32)) | |
1411 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && | |
1412 | payload) | |
1413 | payload--; | |
1da177e4 | 1414 | |
35644090 SR |
1415 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
1416 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1417 | hpsb_speedto_str[scsi_id->speed_code], | |
1418 | SBP2_PAYLOAD_TO_BYTES(payload)); | |
1da177e4 | 1419 | |
fd23ade8 | 1420 | scsi_id->max_payload_size = payload; |
a237f35f | 1421 | return 0; |
1da177e4 LT |
1422 | } |
1423 | ||
1da177e4 LT |
1424 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) |
1425 | { | |
1426 | quadlet_t data; | |
1427 | u64 addr; | |
1428 | int retval; | |
cc078189 | 1429 | unsigned long flags; |
1da177e4 | 1430 | |
d19c7764 | 1431 | /* cancel_delayed_work(&scsi_id->protocol_work); */ |
09ee67ab SR |
1432 | if (wait) |
1433 | flush_scheduled_work(); | |
1434 | ||
1da177e4 | 1435 | data = ntohl(SBP2_AGENT_RESET_DATA); |
ca0c7453 | 1436 | addr = scsi_id->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
1da177e4 LT |
1437 | |
1438 | if (wait) | |
1439 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1440 | else | |
1441 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1442 | ||
1443 | if (retval < 0) { | |
1444 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1445 | return -EIO; | |
1446 | } | |
1447 | ||
e8ca5668 | 1448 | /* make sure that the ORB_POINTER is written on next command */ |
ca0c7453 | 1449 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 1450 | scsi_id->last_orb = NULL; |
ca0c7453 | 1451 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 1452 | |
a237f35f | 1453 | return 0; |
1da177e4 LT |
1454 | } |
1455 | ||
cf8d2c09 | 1456 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
ca0c7453 | 1457 | struct sbp2_fwhost_info *hi, |
cf8d2c09 SR |
1458 | struct sbp2_command_info *command, |
1459 | unsigned int scsi_use_sg, | |
1460 | struct scatterlist *sgpnt, | |
1461 | u32 orb_direction, | |
1462 | enum dma_data_direction dma_dir) | |
1463 | { | |
1464 | command->dma_dir = dma_dir; | |
1465 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1466 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1467 | ||
e8ca5668 | 1468 | /* special case if only one element (and less than 64KB in size) */ |
cf8d2c09 SR |
1469 | if ((scsi_use_sg == 1) && |
1470 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1471 | ||
cf8d2c09 SR |
1472 | command->dma_size = sgpnt[0].length; |
1473 | command->dma_type = CMD_DMA_PAGE; | |
1474 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1475 | sgpnt[0].page, | |
1476 | sgpnt[0].offset, | |
1477 | command->dma_size, | |
1478 | command->dma_dir); | |
cf8d2c09 SR |
1479 | |
1480 | orb->data_descriptor_lo = command->cmd_dma; | |
1481 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1482 | ||
1483 | } else { | |
1484 | struct sbp2_unrestricted_page_table *sg_element = | |
1485 | &command->scatter_gather_element[0]; | |
1486 | u32 sg_count, sg_len; | |
1487 | dma_addr_t sg_addr; | |
1488 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1489 | dma_dir); | |
1490 | ||
cf8d2c09 SR |
1491 | command->dma_size = scsi_use_sg; |
1492 | command->sge_buffer = sgpnt; | |
1493 | ||
1494 | /* use page tables (s/g) */ | |
1495 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1496 | orb->data_descriptor_lo = command->sge_dma; | |
1497 | ||
e8ca5668 SR |
1498 | /* loop through and fill out our SBP-2 page tables |
1499 | * (and split up anything too large) */ | |
cf8d2c09 SR |
1500 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { |
1501 | sg_len = sg_dma_len(sgpnt); | |
1502 | sg_addr = sg_dma_address(sgpnt); | |
1503 | while (sg_len) { | |
1504 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1505 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1506 | sg_element[sg_count].length_segment_base_hi = | |
1507 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1508 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1509 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1510 | } else { | |
1511 | sg_element[sg_count].length_segment_base_hi = | |
1512 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1513 | sg_len = 0; | |
1514 | } | |
1515 | sg_count++; | |
1516 | } | |
1517 | } | |
1518 | ||
cf8d2c09 SR |
1519 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
1520 | ||
cf8d2c09 SR |
1521 | sbp2util_cpu_to_be32_buffer(sg_element, |
1522 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1523 | sg_count); | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
ca0c7453 | 1528 | struct sbp2_fwhost_info *hi, |
cf8d2c09 SR |
1529 | struct sbp2_command_info *command, |
1530 | struct scatterlist *sgpnt, | |
1531 | u32 orb_direction, | |
1532 | unsigned int scsi_request_bufflen, | |
1533 | void *scsi_request_buffer, | |
1534 | enum dma_data_direction dma_dir) | |
1535 | { | |
1536 | command->dma_dir = dma_dir; | |
1537 | command->dma_size = scsi_request_bufflen; | |
1538 | command->dma_type = CMD_DMA_SINGLE; | |
1539 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1540 | command->dma_size, command->dma_dir); | |
1541 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1542 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1543 | ||
e8ca5668 SR |
1544 | /* handle case where we get a command w/o s/g enabled |
1545 | * (but check for transfers larger than 64K) */ | |
cf8d2c09 SR |
1546 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
1547 | ||
1548 | orb->data_descriptor_lo = command->cmd_dma; | |
1549 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1550 | ||
1551 | } else { | |
e8ca5668 SR |
1552 | /* The buffer is too large. Turn this into page tables. */ |
1553 | ||
cf8d2c09 SR |
1554 | struct sbp2_unrestricted_page_table *sg_element = |
1555 | &command->scatter_gather_element[0]; | |
1556 | u32 sg_count, sg_len; | |
1557 | dma_addr_t sg_addr; | |
1558 | ||
cf8d2c09 | 1559 | orb->data_descriptor_lo = command->sge_dma; |
cf8d2c09 SR |
1560 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
1561 | ||
e8ca5668 | 1562 | /* fill out our SBP-2 page tables; split up the large buffer */ |
cf8d2c09 SR |
1563 | sg_count = 0; |
1564 | sg_len = scsi_request_bufflen; | |
1565 | sg_addr = command->cmd_dma; | |
1566 | while (sg_len) { | |
1567 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1568 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1569 | sg_element[sg_count].length_segment_base_hi = | |
1570 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1571 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1572 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1573 | } else { | |
1574 | sg_element[sg_count].length_segment_base_hi = | |
1575 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1576 | sg_len = 0; | |
1577 | } | |
1578 | sg_count++; | |
1579 | } | |
1580 | ||
cf8d2c09 SR |
1581 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
1582 | ||
cf8d2c09 SR |
1583 | sbp2util_cpu_to_be32_buffer(sg_element, |
1584 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1585 | sg_count); | |
1586 | } | |
1587 | } | |
1588 | ||
cf8d2c09 SR |
1589 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1590 | struct sbp2_command_info *command, | |
1591 | unchar *scsi_cmd, | |
1592 | unsigned int scsi_use_sg, | |
1593 | unsigned int scsi_request_bufflen, | |
1594 | void *scsi_request_buffer, | |
1595 | enum dma_data_direction dma_dir) | |
1da177e4 | 1596 | { |
ca0c7453 | 1597 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
a237f35f | 1598 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1599 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1600 | u32 orb_direction; |
1da177e4 LT |
1601 | |
1602 | /* | |
e8ca5668 | 1603 | * Set-up our command ORB. |
1da177e4 LT |
1604 | * |
1605 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1606 | * best performance (at least with the devices I have). This means | |
1607 | * that data_size becomes the number of s/g elements, and | |
1608 | * page_size should be zero (for unrestricted). | |
1609 | */ | |
1610 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1611 | command_orb->next_ORB_lo = 0x0; | |
1612 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1613 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
e8ca5668 | 1614 | command_orb->misc |= ORB_SET_NOTIFY(1); |
1da177e4 | 1615 | |
43863eba | 1616 | if (dma_dir == DMA_NONE) |
a237f35f | 1617 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1618 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1619 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1620 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1621 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba | 1622 | else { |
35644090 | 1623 | SBP2_INFO("Falling back to DMA_NONE"); |
43863eba | 1624 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
1da177e4 LT |
1625 | } |
1626 | ||
e8ca5668 | 1627 | /* set up our page table stuff */ |
1da177e4 | 1628 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 LT |
1629 | command_orb->data_descriptor_hi = 0x0; |
1630 | command_orb->data_descriptor_lo = 0x0; | |
1631 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
edf1fb21 | 1632 | } else if (scsi_use_sg) |
cf8d2c09 SR |
1633 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1634 | sgpnt, orb_direction, dma_dir); | |
edf1fb21 | 1635 | else |
cf8d2c09 SR |
1636 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1637 | orb_direction, scsi_request_bufflen, | |
1638 | scsi_request_buffer, dma_dir); | |
1da177e4 | 1639 | |
1da177e4 LT |
1640 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1641 | ||
1da177e4 LT |
1642 | memset(command_orb->cdb, 0, 12); |
1643 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1644 | } |
1645 | ||
28212767 | 1646 | static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
1647 | struct sbp2_command_info *command) |
1648 | { | |
ca0c7453 | 1649 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 | 1650 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cc078189 SR |
1651 | struct sbp2_command_orb *last_orb; |
1652 | dma_addr_t last_orb_dma; | |
ca0c7453 | 1653 | u64 addr = scsi_id->command_block_agent_addr; |
cc078189 SR |
1654 | quadlet_t data[2]; |
1655 | size_t length; | |
1656 | unsigned long flags; | |
1da177e4 | 1657 | |
1da177e4 LT |
1658 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, |
1659 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1660 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1661 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
1662 | sizeof(command->scatter_gather_element), | |
1663 | PCI_DMA_BIDIRECTIONAL); | |
e8ca5668 SR |
1664 | |
1665 | /* check to see if there are any previous orbs to use */ | |
ca0c7453 | 1666 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
cc078189 SR |
1667 | last_orb = scsi_id->last_orb; |
1668 | last_orb_dma = scsi_id->last_orb_dma; | |
1669 | if (!last_orb) { | |
1da177e4 | 1670 | /* |
cc078189 SR |
1671 | * last_orb == NULL means: We know that the target's fetch agent |
1672 | * is not active right now. | |
1da177e4 | 1673 | */ |
cc078189 | 1674 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 LT |
1675 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1676 | data[1] = command->command_orb_dma; | |
1677 | sbp2util_cpu_to_be32_buffer(data, 8); | |
cc078189 | 1678 | length = 8; |
1da177e4 | 1679 | } else { |
1da177e4 | 1680 | /* |
cc078189 SR |
1681 | * last_orb != NULL means: We know that the target's fetch agent |
1682 | * is (very probably) not dead or in reset state right now. | |
1683 | * We have an ORB already sent that we can append a new one to. | |
1684 | * The target's fetch agent may or may not have read this | |
1685 | * previous ORB yet. | |
1da177e4 | 1686 | */ |
cc078189 SR |
1687 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
1688 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1689 | PCI_DMA_TODEVICE); |
cc078189 SR |
1690 | last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); |
1691 | wmb(); | |
1da177e4 | 1692 | /* Tells hardware that this pointer is valid */ |
cc078189 SR |
1693 | last_orb->next_ORB_hi = 0; |
1694 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, | |
1da177e4 | 1695 | sizeof(struct sbp2_command_orb), |
d4018d7f | 1696 | PCI_DMA_TODEVICE); |
cc078189 SR |
1697 | addr += SBP2_DOORBELL_OFFSET; |
1698 | data[0] = 0; | |
1699 | length = 4; | |
1700 | } | |
1701 | scsi_id->last_orb = command_orb; | |
1702 | scsi_id->last_orb_dma = command->command_orb_dma; | |
ca0c7453 | 1703 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 1704 | |
09ee67ab SR |
1705 | if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) { |
1706 | /* | |
1707 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
1708 | * of transaction labels, perhaps just because there were no | |
1709 | * context switches which gave khpsbpkt a chance to collect | |
1710 | * free tlabels. Try again in non-atomic context. If necessary, | |
1711 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
1712 | * We do not accept new commands until the job is over. | |
1713 | */ | |
1714 | scsi_block_requests(scsi_id->scsi_host); | |
d19c7764 | 1715 | PREPARE_WORK(&scsi_id->protocol_work, |
09ee67ab | 1716 | last_orb ? sbp2util_write_doorbell: |
d19c7764 SR |
1717 | sbp2util_write_orb_pointer |
1718 | /* */); | |
1719 | schedule_work(&scsi_id->protocol_work); | |
09ee67ab | 1720 | } |
1da177e4 LT |
1721 | } |
1722 | ||
1da177e4 LT |
1723 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, |
1724 | struct scsi_cmnd *SCpnt, | |
1725 | void (*done)(struct scsi_cmnd *)) | |
1726 | { | |
1727 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
1728 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
1729 | struct sbp2_command_info *command; | |
1730 | ||
1da177e4 | 1731 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); |
edf1fb21 | 1732 | if (!command) |
a237f35f | 1733 | return -EIO; |
1da177e4 | 1734 | |
1da177e4 LT |
1735 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, |
1736 | request_bufflen, SCpnt->request_buffer, | |
1737 | SCpnt->sc_data_direction); | |
1da177e4 LT |
1738 | sbp2_link_orb_command(scsi_id, command); |
1739 | ||
a237f35f | 1740 | return 0; |
1da177e4 LT |
1741 | } |
1742 | ||
1da177e4 LT |
1743 | /* |
1744 | * Translates SBP-2 status into SCSI sense data for check conditions | |
1745 | */ | |
1746 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
1747 | { | |
e8ca5668 | 1748 | /* OK, it's pretty ugly... ;-) */ |
1da177e4 LT |
1749 | sense_data[0] = 0x70; |
1750 | sense_data[1] = 0x0; | |
1751 | sense_data[2] = sbp2_status[9]; | |
1752 | sense_data[3] = sbp2_status[12]; | |
1753 | sense_data[4] = sbp2_status[13]; | |
1754 | sense_data[5] = sbp2_status[14]; | |
1755 | sense_data[6] = sbp2_status[15]; | |
1756 | sense_data[7] = 10; | |
1757 | sense_data[8] = sbp2_status[16]; | |
1758 | sense_data[9] = sbp2_status[17]; | |
1759 | sense_data[10] = sbp2_status[18]; | |
1760 | sense_data[11] = sbp2_status[19]; | |
1761 | sense_data[12] = sbp2_status[10]; | |
1762 | sense_data[13] = sbp2_status[11]; | |
1763 | sense_data[14] = sbp2_status[20]; | |
1764 | sense_data[15] = sbp2_status[21]; | |
1765 | ||
e8ca5668 | 1766 | return sbp2_status[8] & 0x3f; |
1da177e4 LT |
1767 | } |
1768 | ||
3e98eab4 SR |
1769 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
1770 | int destid, quadlet_t *data, u64 addr, | |
1771 | size_t length, u16 fl) | |
1da177e4 | 1772 | { |
ca0c7453 | 1773 | struct sbp2_fwhost_info *hi; |
1da177e4 | 1774 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; |
1da177e4 | 1775 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 1776 | struct sbp2_status_block *sb; |
1da177e4 LT |
1777 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
1778 | struct sbp2_command_info *command; | |
79456197 | 1779 | unsigned long flags; |
1da177e4 | 1780 | |
6065772d SR |
1781 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
1782 | SBP2_ERR("Wrong size of status block"); | |
1783 | return RCODE_ADDRESS_ERROR; | |
1784 | } | |
1785 | if (unlikely(!host)) { | |
1da177e4 | 1786 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 1787 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1788 | } |
1da177e4 | 1789 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 1790 | if (unlikely(!hi)) { |
1da177e4 | 1791 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 1792 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1793 | } |
e8ca5668 SR |
1794 | |
1795 | /* Find the unit which wrote the status. */ | |
1da177e4 | 1796 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
1797 | if (scsi_id_tmp->ne->nodeid == nodeid && |
1798 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
1799 | scsi_id = scsi_id_tmp; |
1800 | break; | |
1801 | } | |
1802 | } | |
6065772d | 1803 | if (unlikely(!scsi_id)) { |
1da177e4 | 1804 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
a237f35f | 1805 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
1806 | } |
1807 | ||
e8ca5668 | 1808 | /* Put response into scsi_id status fifo buffer. The first two bytes |
3e98eab4 SR |
1809 | * come in big endian bit order. Often the target writes only a |
1810 | * truncated status block, minimally the first two quadlets. The rest | |
e8ca5668 | 1811 | * is implied to be zeros. */ |
3e98eab4 SR |
1812 | sb = &scsi_id->status_block; |
1813 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); | |
1814 | memcpy(sb, data, length); | |
1815 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 | 1816 | |
e8ca5668 | 1817 | /* Ignore unsolicited status. Handle command ORB status. */ |
6065772d SR |
1818 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
1819 | command = NULL; | |
1820 | else | |
1821 | command = sbp2util_find_command_for_orb(scsi_id, | |
1822 | sb->ORB_offset_lo); | |
1da177e4 | 1823 | if (command) { |
1da177e4 LT |
1824 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, |
1825 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1826 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1827 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
1828 | sizeof(command->scatter_gather_element), | |
1829 | PCI_DMA_BIDIRECTIONAL); | |
e8ca5668 | 1830 | /* Grab SCSI command pointers and check status. */ |
6065772d SR |
1831 | /* |
1832 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
1833 | * not be reused until status for a subsequent ORB is received. | |
1834 | */ | |
1da177e4 | 1835 | SCpnt = command->Current_SCpnt; |
ca0c7453 | 1836 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 1837 | sbp2util_mark_command_completed(scsi_id, command); |
ca0c7453 | 1838 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
1839 | |
1840 | if (SCpnt) { | |
abbca103 SR |
1841 | u32 h = sb->ORB_offset_hi_misc; |
1842 | u32 r = STATUS_GET_RESP(h); | |
1843 | ||
1844 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
35644090 | 1845 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
abbca103 | 1846 | r, STATUS_GET_SBP_STATUS(h)); |
6065772d | 1847 | scsi_status = |
abbca103 SR |
1848 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
1849 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 1850 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 1851 | } |
e8ca5668 | 1852 | |
edf1fb21 | 1853 | if (STATUS_GET_LEN(h) > 1) |
3e98eab4 SR |
1854 | scsi_status = sbp2_status_to_sense_data( |
1855 | (unchar *)sb, SCpnt->sense_buffer); | |
e8ca5668 | 1856 | |
edf1fb21 | 1857 | if (STATUS_TEST_DEAD(h)) |
1da177e4 | 1858 | sbp2_agent_reset(scsi_id, 0); |
1da177e4 LT |
1859 | } |
1860 | ||
e8ca5668 | 1861 | /* Check here to see if there are no commands in-use. If there |
cc078189 SR |
1862 | * are none, we know that the fetch agent left the active state |
1863 | * _and_ that we did not reactivate it yet. Therefore clear | |
1864 | * last_orb so that next time we write directly to the | |
1865 | * ORB_POINTER register. That way the fetch agent does not need | |
e8ca5668 | 1866 | * to refetch the next_ORB. */ |
ca0c7453 SR |
1867 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1868 | if (list_empty(&scsi_id->cmd_orb_inuse)) | |
1da177e4 | 1869 | scsi_id->last_orb = NULL; |
ca0c7453 | 1870 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
1871 | |
1872 | } else { | |
e8ca5668 | 1873 | /* It's probably status after a management request. */ |
3e98eab4 SR |
1874 | if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || |
1875 | (sb->ORB_offset_lo == scsi_id->login_orb_dma) || | |
1876 | (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || | |
e8398bb7 SR |
1877 | (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { |
1878 | scsi_id->access_complete = 1; | |
ca0c7453 | 1879 | wake_up_interruptible(&sbp2_access_wq); |
e8398bb7 | 1880 | } |
1da177e4 LT |
1881 | } |
1882 | ||
edf1fb21 | 1883 | if (SCpnt) |
1da177e4 LT |
1884 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, |
1885 | command->Current_done); | |
a237f35f | 1886 | return RCODE_COMPLETE; |
1da177e4 LT |
1887 | } |
1888 | ||
1da177e4 LT |
1889 | /************************************** |
1890 | * SCSI interface related section | |
1891 | **************************************/ | |
1892 | ||
1da177e4 LT |
1893 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
1894 | void (*done)(struct scsi_cmnd *)) | |
1895 | { | |
1896 | struct scsi_id_instance_data *scsi_id = | |
1897 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
ca0c7453 | 1898 | struct sbp2_fwhost_info *hi; |
abd559b1 | 1899 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 1900 | |
5796aa7b | 1901 | if (unlikely(!sbp2util_node_is_available(scsi_id))) |
abd559b1 | 1902 | goto done; |
1da177e4 LT |
1903 | |
1904 | hi = scsi_id->hi; | |
1905 | ||
5796aa7b | 1906 | if (unlikely(!hi)) { |
ca0c7453 | 1907 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
abd559b1 | 1908 | goto done; |
1da177e4 LT |
1909 | } |
1910 | ||
e8ca5668 SR |
1911 | /* Multiple units are currently represented to the SCSI core as separate |
1912 | * targets, not as one target with multiple LUs. Therefore return | |
1913 | * selection time-out to any IO directed at non-zero LUNs. */ | |
5796aa7b | 1914 | if (unlikely(SCpnt->device->lun)) |
abd559b1 | 1915 | goto done; |
1da177e4 | 1916 | |
e8ca5668 | 1917 | /* handle the request sense command here (auto-request sense) */ |
1da177e4 | 1918 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { |
1da177e4 LT |
1919 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); |
1920 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
1921 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 1922 | return 0; |
1da177e4 LT |
1923 | } |
1924 | ||
5796aa7b | 1925 | if (unlikely(!hpsb_node_entry_valid(scsi_id->ne))) { |
1da177e4 | 1926 | SBP2_ERR("Bus reset in progress - rejecting command"); |
abd559b1 JM |
1927 | result = DID_BUS_BUSY << 16; |
1928 | goto done; | |
1da177e4 LT |
1929 | } |
1930 | ||
e8ca5668 SR |
1931 | /* Bidirectional commands are not yet implemented, |
1932 | * and unknown transfer direction not handled. */ | |
5796aa7b | 1933 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
43863eba SR |
1934 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
1935 | result = DID_ERROR << 16; | |
1936 | goto done; | |
1937 | } | |
1938 | ||
1da177e4 LT |
1939 | if (sbp2_send_command(scsi_id, SCpnt, done)) { |
1940 | SBP2_ERR("Error sending SCSI command"); | |
1941 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
1942 | SCpnt, done); | |
1943 | } | |
abd559b1 | 1944 | return 0; |
1da177e4 | 1945 | |
abd559b1 JM |
1946 | done: |
1947 | SCpnt->result = result; | |
1948 | done(SCpnt); | |
1949 | return 0; | |
1da177e4 LT |
1950 | } |
1951 | ||
1da177e4 LT |
1952 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, |
1953 | u32 status) | |
1954 | { | |
ca0c7453 | 1955 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 LT |
1956 | struct list_head *lh; |
1957 | struct sbp2_command_info *command; | |
79456197 | 1958 | unsigned long flags; |
1da177e4 | 1959 | |
ca0c7453 SR |
1960 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1961 | while (!list_empty(&scsi_id->cmd_orb_inuse)) { | |
1962 | lh = scsi_id->cmd_orb_inuse.next; | |
1da177e4 LT |
1963 | command = list_entry(lh, struct sbp2_command_info, list); |
1964 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
1965 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1966 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1967 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
1968 | sizeof(command->scatter_gather_element), | |
1969 | PCI_DMA_BIDIRECTIONAL); | |
1970 | sbp2util_mark_command_completed(scsi_id, command); | |
1971 | if (command->Current_SCpnt) { | |
1972 | command->Current_SCpnt->result = status << 16; | |
1973 | command->Current_done(command->Current_SCpnt); | |
1974 | } | |
1975 | } | |
ca0c7453 | 1976 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
1977 | |
1978 | return; | |
1979 | } | |
1980 | ||
1981 | /* | |
e8ca5668 | 1982 | * Complete a regular SCSI command. Can be called in atomic context. |
1da177e4 LT |
1983 | */ |
1984 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
1985 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
1986 | void (*done)(struct scsi_cmnd *)) | |
1987 | { | |
1da177e4 LT |
1988 | if (!SCpnt) { |
1989 | SBP2_ERR("SCpnt is NULL"); | |
1990 | return; | |
1991 | } | |
1992 | ||
1da177e4 | 1993 | switch (scsi_status) { |
a237f35f | 1994 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 1995 | SCpnt->result = DID_OK << 16; |
a237f35f | 1996 | break; |
1da177e4 | 1997 | |
a237f35f SR |
1998 | case SBP2_SCSI_STATUS_BUSY: |
1999 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2000 | SCpnt->result = DID_BUS_BUSY << 16; | |
2001 | break; | |
1da177e4 | 2002 | |
a237f35f | 2003 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
8f0525ff | 2004 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
a237f35f | 2005 | break; |
1da177e4 | 2006 | |
a237f35f SR |
2007 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2008 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2009 | SCpnt->result = DID_NO_CONNECT << 16; | |
2010 | scsi_print_command(SCpnt); | |
2011 | break; | |
1da177e4 | 2012 | |
a237f35f SR |
2013 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2014 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2015 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2016 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2017 | SCpnt->result = DID_ERROR << 16; | |
2018 | scsi_print_command(SCpnt); | |
2019 | break; | |
1da177e4 | 2020 | |
a237f35f SR |
2021 | default: |
2022 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2023 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2024 | } |
2025 | ||
e8ca5668 SR |
2026 | /* If a bus reset is in progress and there was an error, complete |
2027 | * the command as busy so that it will get retried. */ | |
a237f35f SR |
2028 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2029 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2030 | SBP2_ERR("Completing command with busy (bus reset)"); |
2031 | SCpnt->result = DID_BUS_BUSY << 16; | |
2032 | } | |
2033 | ||
e8ca5668 | 2034 | /* Tell the SCSI stack that we're done with this command. */ |
a237f35f | 2035 | done(SCpnt); |
1da177e4 LT |
2036 | } |
2037 | ||
abd559b1 | 2038 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2039 | { |
a80614d1 SR |
2040 | struct scsi_id_instance_data *scsi_id = |
2041 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2042 | ||
2043 | scsi_id->sdev = sdev; | |
c394f1ea | 2044 | sdev->allow_restart = 1; |
a80614d1 | 2045 | |
24d3bf88 | 2046 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2047 | sdev->inquiry_len = 36; |
abd559b1 JM |
2048 | return 0; |
2049 | } | |
2050 | ||
abd559b1 JM |
2051 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2052 | { | |
24d3bf88 SR |
2053 | struct scsi_id_instance_data *scsi_id = |
2054 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2055 | ||
abd559b1 | 2056 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f | 2057 | sdev->use_10_for_rw = 1; |
24d3bf88 SR |
2058 | |
2059 | if (sdev->type == TYPE_DISK && | |
2060 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2061 | sdev->skip_ms_page_8 = 1; | |
e9a1c52c SR |
2062 | if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
2063 | sdev->fix_capacity = 1; | |
1da177e4 LT |
2064 | return 0; |
2065 | } | |
2066 | ||
abd559b1 JM |
2067 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2068 | { | |
2069 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2070 | return; | |
2071 | } | |
2072 | ||
1da177e4 | 2073 | /* |
e8ca5668 SR |
2074 | * Called by scsi stack when something has really gone wrong. |
2075 | * Usually called when a command has timed-out for some reason. | |
1da177e4 LT |
2076 | */ |
2077 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2078 | { | |
2079 | struct scsi_id_instance_data *scsi_id = | |
2080 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
ca0c7453 | 2081 | struct sbp2_fwhost_info *hi = scsi_id->hi; |
1da177e4 | 2082 | struct sbp2_command_info *command; |
24c7cd06 | 2083 | unsigned long flags; |
1da177e4 | 2084 | |
35644090 | 2085 | SBP2_INFO("aborting sbp2 command"); |
1da177e4 LT |
2086 | scsi_print_command(SCpnt); |
2087 | ||
abd559b1 | 2088 | if (sbp2util_node_is_available(scsi_id)) { |
23077f1d | 2089 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 | 2090 | |
23077f1d | 2091 | /* Return a matching command structure to the free pool. */ |
ca0c7453 | 2092 | spin_lock_irqsave(&scsi_id->cmd_orb_lock, flags); |
1da177e4 LT |
2093 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2094 | if (command) { | |
1da177e4 LT |
2095 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2096 | command->command_orb_dma, | |
2097 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2098 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2099 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2100 | command->sge_dma, | |
2101 | sizeof(command->scatter_gather_element), | |
2102 | PCI_DMA_BIDIRECTIONAL); | |
2103 | sbp2util_mark_command_completed(scsi_id, command); | |
2104 | if (command->Current_SCpnt) { | |
2105 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2106 | command->Current_done(command->Current_SCpnt); | |
2107 | } | |
2108 | } | |
ca0c7453 | 2109 | spin_unlock_irqrestore(&scsi_id->cmd_orb_lock, flags); |
1da177e4 | 2110 | |
1da177e4 LT |
2111 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
2112 | } | |
2113 | ||
a237f35f | 2114 | return SUCCESS; |
1da177e4 LT |
2115 | } |
2116 | ||
2117 | /* | |
2118 | * Called by scsi stack when something has really gone wrong. | |
2119 | */ | |
abd559b1 | 2120 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2121 | { |
2122 | struct scsi_id_instance_data *scsi_id = | |
2123 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2124 | ||
35644090 | 2125 | SBP2_INFO("reset requested"); |
1da177e4 | 2126 | |
abd559b1 | 2127 | if (sbp2util_node_is_available(scsi_id)) { |
35644090 | 2128 | SBP2_INFO("generating sbp2 fetch agent reset"); |
1f427e80 | 2129 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2130 | } |
2131 | ||
abd559b1 | 2132 | return SUCCESS; |
94d0e7b8 JG |
2133 | } |
2134 | ||
a237f35f SR |
2135 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2136 | struct device_attribute *attr, | |
2137 | char *buf) | |
1da177e4 LT |
2138 | { |
2139 | struct scsi_device *sdev; | |
2140 | struct scsi_id_instance_data *scsi_id; | |
1da177e4 LT |
2141 | |
2142 | if (!(sdev = to_scsi_device(dev))) | |
2143 | return 0; | |
2144 | ||
2145 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2146 | return 0; | |
2147 | ||
1da177e4 | 2148 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, |
ca0c7453 | 2149 | scsi_id->ud->id, ORB_SET_LUN(scsi_id->lun)); |
1da177e4 | 2150 | } |
1da177e4 LT |
2151 | |
2152 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2153 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2154 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2155 | MODULE_LICENSE("GPL"); | |
2156 | ||
1da177e4 LT |
2157 | static int sbp2_module_init(void) |
2158 | { | |
2159 | int ret; | |
2160 | ||
ca0c7453 SR |
2161 | if (sbp2_serialize_io) { |
2162 | sbp2_shost_template.can_queue = 1; | |
2163 | sbp2_shost_template.cmd_per_lun = 1; | |
1da177e4 LT |
2164 | } |
2165 | ||
24d3bf88 | 2166 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
ca0c7453 SR |
2167 | (sbp2_max_sectors * 512) > (128 * 1024)) |
2168 | sbp2_max_sectors = 128 * 1024 / 512; | |
2169 | sbp2_shost_template.max_sectors = sbp2_max_sectors; | |
1da177e4 | 2170 | |
1da177e4 | 2171 | hpsb_register_highlevel(&sbp2_highlevel); |
1da177e4 LT |
2172 | ret = hpsb_register_protocol(&sbp2_driver); |
2173 | if (ret) { | |
2174 | SBP2_ERR("Failed to register protocol"); | |
2175 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2176 | return ret; | |
2177 | } | |
1da177e4 LT |
2178 | return 0; |
2179 | } | |
2180 | ||
2181 | static void __exit sbp2_module_exit(void) | |
2182 | { | |
1da177e4 | 2183 | hpsb_unregister_protocol(&sbp2_driver); |
1da177e4 LT |
2184 | hpsb_unregister_highlevel(&sbp2_highlevel); |
2185 | } | |
2186 | ||
2187 | module_init(sbp2_module_init); | |
2188 | module_exit(sbp2_module_exit); |