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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 | ||
1da177e4 LT |
41 | #include <linux/kernel.h> |
42 | #include <linux/list.h> | |
43 | #include <linux/string.h> | |
24d3bf88 | 44 | #include <linux/stringify.h> |
1da177e4 LT |
45 | #include <linux/slab.h> |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/fs.h> | |
48 | #include <linux/poll.h> | |
49 | #include <linux/module.h> | |
50 | #include <linux/moduleparam.h> | |
51 | #include <linux/types.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/sched.h> | |
54 | #include <linux/blkdev.h> | |
55 | #include <linux/smp_lock.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/pci.h> | |
e8398bb7 | 58 | #include <linux/wait.h> |
1da177e4 LT |
59 | |
60 | #include <asm/current.h> | |
61 | #include <asm/uaccess.h> | |
62 | #include <asm/io.h> | |
63 | #include <asm/byteorder.h> | |
1da177e4 LT |
64 | #include <asm/system.h> |
65 | #include <asm/scatterlist.h> | |
66 | ||
67 | #include <scsi/scsi.h> | |
68 | #include <scsi/scsi_cmnd.h> | |
69 | #include <scsi/scsi_dbg.h> | |
70 | #include <scsi/scsi_device.h> | |
71 | #include <scsi/scsi_host.h> | |
72 | ||
73 | #include "csr1212.h" | |
74 | #include "ieee1394.h" | |
75 | #include "ieee1394_types.h" | |
76 | #include "ieee1394_core.h" | |
77 | #include "nodemgr.h" | |
78 | #include "hosts.h" | |
79 | #include "highlevel.h" | |
80 | #include "ieee1394_transactions.h" | |
81 | #include "sbp2.h" | |
82 | ||
1da177e4 LT |
83 | /* |
84 | * Module load parameter definitions | |
85 | */ | |
86 | ||
87 | /* | |
88 | * Change max_speed on module load if you have a bad IEEE-1394 | |
89 | * controller that has trouble running 2KB packets at 400mb. | |
90 | * | |
91 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
92 | * (probably due to PCI latency/throughput issues with the part). You can | |
93 | * bump down the speed if you are running into problems. | |
94 | */ | |
95 | static int max_speed = IEEE1394_SPEED_MAX; | |
96 | module_param(max_speed, int, 0644); | |
2bab359a | 97 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
101 | * down to us at a time (debugging). This might be necessary for very | |
102 | * badly behaved sbp2 devices. | |
2bab359a JM |
103 | * |
104 | * TODO: Make this configurable per device. | |
1da177e4 | 105 | */ |
2bab359a | 106 | static int serialize_io = 1; |
1da177e4 | 107 | module_param(serialize_io, int, 0444); |
2bab359a | 108 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
1da177e4 LT |
109 | |
110 | /* | |
111 | * Bump up max_sectors if you'd like to support very large sized | |
112 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
113 | * transfers greater or equal to 128KB. Default is a value of 255 | |
114 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
115 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
116 | * transfer sizes. | |
117 | */ | |
118 | static int max_sectors = SBP2_MAX_SECTORS; | |
119 | module_param(max_sectors, int, 0444); | |
24d3bf88 SR |
120 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = " |
121 | __stringify(SBP2_MAX_SECTORS) ")"); | |
1da177e4 LT |
122 | |
123 | /* | |
124 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
125 | * do an exclusive login, as it's generally unsafe to have two hosts | |
126 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
127 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
128 | * and you're either running read-only filesystems or some sort of special | |
20f45781 BC |
129 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
130 | * File System, or Lustre, then set exclusive_login to zero. | |
131 | * | |
132 | * So far only bridges from Oxford Semiconductor are known to support | |
133 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
134 | * are possible on OXFW911 and newer Oxsemi bridges. | |
1da177e4 LT |
135 | */ |
136 | static int exclusive_login = 1; | |
137 | module_param(exclusive_login, int, 0644); | |
138 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); | |
139 | ||
140 | /* | |
24d3bf88 SR |
141 | * If any of the following workarounds is required for your device to work, |
142 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
143 | * mailing list. | |
1da177e4 | 144 | * |
24d3bf88 SR |
145 | * - 128kB max transfer |
146 | * Limit transfer size. Necessary for some old bridges. | |
147 | * | |
148 | * - 36 byte inquiry | |
149 | * When scsi_mod probes the device, let the inquiry command look like that | |
150 | * from MS Windows. | |
151 | * | |
152 | * - skip mode page 8 | |
153 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
154 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
e9a1c52c SR |
155 | * |
156 | * - fix capacity | |
157 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
158 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
159 | * Don't use this with devices which don't have this bug. | |
679c0cd2 SR |
160 | * |
161 | * - override internal blacklist | |
162 | * Instead of adding to the built-in blacklist, use only the workarounds | |
163 | * specified in the module load parameter. | |
164 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 165 | */ |
24d3bf88 SR |
166 | static int sbp2_default_workarounds; |
167 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
168 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
169 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
170 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
171 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 172 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
679c0cd2 | 173 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
174 | ", or a combination)"); |
175 | ||
1da177e4 LT |
176 | /* |
177 | * Export information about protocols/devices supported by this driver. | |
178 | */ | |
179 | static struct ieee1394_device_id sbp2_id_table[] = { | |
180 | { | |
a237f35f SR |
181 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
182 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
183 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
184 | {} | |
1da177e4 LT |
185 | }; |
186 | ||
187 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
188 | ||
189 | /* | |
190 | * Debug levels, configured via kernel config, or enable here. | |
191 | */ | |
192 | ||
44456d37 | 193 | #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
1da177e4 LT |
194 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
195 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
196 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
197 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
198 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
199 | ||
200 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
201 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
202 | static u32 global_outstanding_command_orbs = 0; | |
203 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
204 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
205 | #else | |
206 | #define SBP2_ORB_DEBUG(fmt, args...) | |
207 | #define outstanding_orb_incr | |
208 | #define outstanding_orb_decr | |
209 | #endif | |
210 | ||
211 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
212 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
213 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
214 | ++global_outstanding_dmas, ## args) | |
215 | #define SBP2_DMA_FREE(fmt, args...) \ | |
216 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
217 | --global_outstanding_dmas, ## args) | |
218 | static u32 global_outstanding_dmas = 0; | |
219 | #else | |
220 | #define SBP2_DMA_ALLOC(fmt, args...) | |
221 | #define SBP2_DMA_FREE(fmt, args...) | |
222 | #endif | |
223 | ||
224 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
225 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
226 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
227 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
228 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
229 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
230 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
231 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
232 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
233 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
234 | #else | |
235 | #define SBP2_DEBUG(fmt, args...) | |
236 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
237 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
238 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
239 | #endif | |
240 | ||
241 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
d024ebc6 | 242 | #define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__) |
1da177e4 | 243 | |
1da177e4 LT |
244 | /* |
245 | * Globals | |
246 | */ | |
247 | ||
248 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
249 | u32 status); | |
250 | ||
251 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
252 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
253 | void (*done)(struct scsi_cmnd *)); | |
254 | ||
255 | static struct scsi_host_template scsi_driver_template; | |
256 | ||
257 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
258 | ||
259 | static void sbp2_host_reset(struct hpsb_host *host); | |
260 | ||
261 | static int sbp2_probe(struct device *dev); | |
262 | static int sbp2_remove(struct device *dev); | |
263 | static int sbp2_update(struct unit_directory *ud); | |
264 | ||
265 | static struct hpsb_highlevel sbp2_highlevel = { | |
266 | .name = SBP2_DEVICE_NAME, | |
267 | .host_reset = sbp2_host_reset, | |
268 | }; | |
269 | ||
270 | static struct hpsb_address_ops sbp2_ops = { | |
271 | .write = sbp2_handle_status_write | |
272 | }; | |
273 | ||
274 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
275 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
a237f35f SR |
276 | .read = sbp2_handle_physdma_read, |
277 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
278 | }; |
279 | #endif | |
280 | ||
281 | static struct hpsb_protocol_driver sbp2_driver = { | |
282 | .name = "SBP2 Driver", | |
283 | .id_table = sbp2_id_table, | |
284 | .update = sbp2_update, | |
285 | .driver = { | |
286 | .name = SBP2_DEVICE_NAME, | |
287 | .bus = &ieee1394_bus_type, | |
288 | .probe = sbp2_probe, | |
289 | .remove = sbp2_remove, | |
290 | }, | |
291 | }; | |
292 | ||
a80614d1 | 293 | /* |
24d3bf88 SR |
294 | * List of devices with known bugs. |
295 | * | |
296 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
297 | * for the type of bridge chip of a device. It yields a few false positives | |
298 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 299 | */ |
24d3bf88 SR |
300 | static const struct { |
301 | u32 firmware_revision; | |
e9a1c52c | 302 | u32 model_id; |
24d3bf88 SR |
303 | unsigned workarounds; |
304 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 305 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 306 | .firmware_revision = 0x002800, |
4b9a3347 | 307 | .model_id = 0x001010, |
24d3bf88 SR |
308 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
309 | SBP2_WORKAROUND_MODE_SENSE_8, | |
310 | }, | |
311 | /* Initio bridges, actually only needed for some older ones */ { | |
312 | .firmware_revision = 0x000200, | |
313 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
314 | }, | |
315 | /* Symbios bridge */ { | |
316 | .firmware_revision = 0xa0b800, | |
317 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
e9a1c52c SR |
318 | }, |
319 | /* | |
320 | * Note about the following Apple iPod blacklist entries: | |
321 | * | |
322 | * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our | |
323 | * matching logic treats 0 as a wildcard, we cannot match this ID | |
324 | * without rewriting the matching routine. Fortunately these iPods | |
325 | * do not feature the read_capacity bug according to one report. | |
326 | * Read_capacity behaviour as well as model_id could change due to | |
327 | * Apple-supplied firmware updates though. | |
328 | */ | |
329 | /* iPod 4th generation */ { | |
330 | .firmware_revision = 0x0a2700, | |
331 | .model_id = 0x000021, | |
332 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
333 | }, | |
334 | /* iPod mini */ { | |
335 | .firmware_revision = 0x0a2700, | |
336 | .model_id = 0x000023, | |
337 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
338 | }, | |
339 | /* iPod Photo */ { | |
340 | .firmware_revision = 0x0a2700, | |
341 | .model_id = 0x00007e, | |
342 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 343 | } |
1da177e4 LT |
344 | }; |
345 | ||
1da177e4 LT |
346 | /************************************** |
347 | * General utility functions | |
348 | **************************************/ | |
349 | ||
1da177e4 LT |
350 | #ifndef __BIG_ENDIAN |
351 | /* | |
352 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
353 | */ | |
2b01b80b | 354 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
355 | { |
356 | u32 *temp = buffer; | |
357 | ||
358 | for (length = (length >> 2); length--; ) | |
359 | temp[length] = be32_to_cpu(temp[length]); | |
360 | ||
361 | return; | |
362 | } | |
363 | ||
364 | /* | |
365 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
366 | */ | |
2b01b80b | 367 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
368 | { |
369 | u32 *temp = buffer; | |
370 | ||
371 | for (length = (length >> 2); length--; ) | |
372 | temp[length] = cpu_to_be32(temp[length]); | |
373 | ||
374 | return; | |
375 | } | |
376 | #else /* BIG_ENDIAN */ | |
377 | /* Why waste the cpu cycles? */ | |
378 | #define sbp2util_be32_to_cpu_buffer(x,y) | |
379 | #define sbp2util_cpu_to_be32_buffer(x,y) | |
380 | #endif | |
381 | ||
382 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
383 | /* | |
384 | * Debug packet dump routine. Length is in bytes. | |
385 | */ | |
a237f35f SR |
386 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
387 | u32 dump_phys_addr) | |
1da177e4 LT |
388 | { |
389 | int i; | |
390 | unsigned char *dump = buffer; | |
391 | ||
392 | if (!dump || !length || !dump_name) | |
393 | return; | |
394 | ||
395 | if (dump_phys_addr) | |
396 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
397 | else | |
398 | printk("[%s]", dump_name); | |
399 | for (i = 0; i < length; i++) { | |
400 | if (i > 0x3f) { | |
401 | printk("\n ..."); | |
402 | break; | |
403 | } | |
404 | if ((i & 0x3) == 0) | |
405 | printk(" "); | |
406 | if ((i & 0xf) == 0) | |
407 | printk("\n "); | |
a237f35f | 408 | printk("%02x ", (int)dump[i]); |
1da177e4 LT |
409 | } |
410 | printk("\n"); | |
411 | ||
412 | return; | |
413 | } | |
414 | #else | |
415 | #define sbp2util_packet_dump(w,x,y,z) | |
416 | #endif | |
417 | ||
e8398bb7 SR |
418 | static DECLARE_WAIT_QUEUE_HEAD(access_wq); |
419 | ||
1da177e4 | 420 | /* |
e8398bb7 SR |
421 | * Waits for completion of an SBP-2 access request. |
422 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 423 | */ |
e8398bb7 SR |
424 | static int sbp2util_access_timeout(struct scsi_id_instance_data *scsi_id, |
425 | int timeout) | |
1da177e4 | 426 | { |
e8398bb7 SR |
427 | long leftover = wait_event_interruptible_timeout( |
428 | access_wq, scsi_id->access_complete, timeout); | |
1da177e4 | 429 | |
e8398bb7 SR |
430 | scsi_id->access_complete = 0; |
431 | return leftover <= 0; | |
1da177e4 LT |
432 | } |
433 | ||
e8398bb7 | 434 | /* Frees an allocated packet */ |
1da177e4 LT |
435 | static void sbp2_free_packet(struct hpsb_packet *packet) |
436 | { | |
437 | hpsb_free_tlabel(packet); | |
438 | hpsb_free_packet(packet); | |
439 | } | |
440 | ||
441 | /* This is much like hpsb_node_write(), except it ignores the response | |
442 | * subaction and returns immediately. Can be used from interrupts. | |
443 | */ | |
444 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 445 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
446 | { |
447 | struct hpsb_packet *packet; | |
448 | ||
449 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
450 | addr, buffer, length); | |
a237f35f SR |
451 | if (!packet) |
452 | return -ENOMEM; | |
1da177e4 | 453 | |
a237f35f SR |
454 | hpsb_set_packet_complete_task(packet, |
455 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
456 | packet); |
457 | ||
458 | hpsb_node_fill_packet(ne, packet); | |
459 | ||
a237f35f | 460 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
461 | sbp2_free_packet(packet); |
462 | return -EIO; | |
463 | } | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * This function is called to create a pool of command orbs used for | |
470 | * command processing. It is called when a new sbp2 device is detected. | |
471 | */ | |
472 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
473 | { | |
474 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
475 | int i; | |
476 | unsigned long flags, orbs; | |
477 | struct sbp2_command_info *command; | |
478 | ||
479 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
480 | ||
481 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
482 | for (i = 0; i < orbs; i++) { | |
8551158a | 483 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 484 | if (!command) { |
a237f35f SR |
485 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
486 | flags); | |
487 | return -ENOMEM; | |
1da177e4 | 488 | } |
1da177e4 | 489 | command->command_orb_dma = |
a237f35f SR |
490 | pci_map_single(hi->host->pdev, &command->command_orb, |
491 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 492 | PCI_DMA_TODEVICE); |
1da177e4 LT |
493 | SBP2_DMA_ALLOC("single command orb DMA"); |
494 | command->sge_dma = | |
a237f35f SR |
495 | pci_map_single(hi->host->pdev, |
496 | &command->scatter_gather_element, | |
497 | sizeof(command->scatter_gather_element), | |
498 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
499 | SBP2_DMA_ALLOC("scatter_gather_element"); |
500 | INIT_LIST_HEAD(&command->list); | |
501 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
502 | } | |
503 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | /* | |
508 | * This function is called to delete a pool of command orbs. | |
509 | */ | |
510 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
511 | { | |
512 | struct hpsb_host *host = scsi_id->hi->host; | |
513 | struct list_head *lh, *next; | |
514 | struct sbp2_command_info *command; | |
515 | unsigned long flags; | |
516 | ||
517 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
518 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
519 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
520 | command = list_entry(lh, struct sbp2_command_info, list); | |
521 | ||
522 | /* Release our generic DMA's */ | |
523 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
524 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 525 | PCI_DMA_TODEVICE); |
1da177e4 LT |
526 | SBP2_DMA_FREE("single command orb DMA"); |
527 | pci_unmap_single(host->pdev, command->sge_dma, | |
528 | sizeof(command->scatter_gather_element), | |
529 | PCI_DMA_BIDIRECTIONAL); | |
530 | SBP2_DMA_FREE("scatter_gather_element"); | |
531 | ||
532 | kfree(command); | |
533 | } | |
534 | } | |
535 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
536 | return; | |
537 | } | |
538 | ||
539 | /* | |
540 | * This function finds the sbp2_command for a given outstanding command | |
541 | * orb.Only looks at the inuse list. | |
542 | */ | |
543 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
544 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
545 | { | |
546 | struct sbp2_command_info *command; | |
547 | unsigned long flags; | |
548 | ||
549 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
550 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
551 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
552 | if (command->command_orb_dma == orb) { | |
553 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 554 | return command; |
1da177e4 LT |
555 | } |
556 | } | |
557 | } | |
558 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
559 | ||
560 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
561 | ||
a237f35f | 562 | return NULL; |
1da177e4 LT |
563 | } |
564 | ||
565 | /* | |
566 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
567 | * Only looks at the inuse list. | |
24c7cd06 | 568 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 569 | */ |
24c7cd06 SR |
570 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
571 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
572 | { |
573 | struct sbp2_command_info *command; | |
1da177e4 | 574 | |
24c7cd06 SR |
575 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) |
576 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) | |
577 | if (command->Current_SCpnt == SCpnt) | |
a237f35f | 578 | return command; |
a237f35f | 579 | return NULL; |
1da177e4 LT |
580 | } |
581 | ||
582 | /* | |
583 | * This function allocates a command orb used to send a scsi command. | |
584 | */ | |
585 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
586 | struct scsi_id_instance_data *scsi_id, | |
587 | struct scsi_cmnd *Current_SCpnt, | |
588 | void (*Current_done)(struct scsi_cmnd *)) | |
589 | { | |
590 | struct list_head *lh; | |
591 | struct sbp2_command_info *command = NULL; | |
592 | unsigned long flags; | |
593 | ||
594 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
595 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
596 | lh = scsi_id->sbp2_command_orb_completed.next; | |
597 | list_del(lh); | |
598 | command = list_entry(lh, struct sbp2_command_info, list); | |
599 | command->Current_done = Current_done; | |
600 | command->Current_SCpnt = Current_SCpnt; | |
601 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
602 | } else { | |
d024ebc6 | 603 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 LT |
604 | } |
605 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 606 | return command; |
1da177e4 LT |
607 | } |
608 | ||
609 | /* Free our DMA's */ | |
610 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
611 | { | |
612 | struct scsi_id_instance_data *scsi_id = | |
613 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
614 | struct hpsb_host *host; | |
615 | ||
616 | if (!scsi_id) { | |
d024ebc6 | 617 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
618 | return; |
619 | } | |
620 | ||
621 | host = scsi_id->ud->ne->host; | |
622 | ||
623 | if (command->cmd_dma) { | |
624 | if (command->dma_type == CMD_DMA_SINGLE) { | |
625 | pci_unmap_single(host->pdev, command->cmd_dma, | |
626 | command->dma_size, command->dma_dir); | |
627 | SBP2_DMA_FREE("single bulk"); | |
628 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
629 | pci_unmap_page(host->pdev, command->cmd_dma, | |
630 | command->dma_size, command->dma_dir); | |
631 | SBP2_DMA_FREE("single page"); | |
632 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
633 | command->dma_type = CMD_DMA_NONE; | |
634 | command->cmd_dma = 0; | |
635 | } | |
636 | ||
637 | if (command->sge_buffer) { | |
638 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
639 | command->dma_size, command->dma_dir); | |
640 | SBP2_DMA_FREE("scatter list"); | |
641 | command->sge_buffer = NULL; | |
642 | } | |
643 | } | |
644 | ||
645 | /* | |
646 | * This function moves a command to the completed orb list. | |
24c7cd06 | 647 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 648 | */ |
24c7cd06 SR |
649 | static void sbp2util_mark_command_completed( |
650 | struct scsi_id_instance_data *scsi_id, | |
651 | struct sbp2_command_info *command) | |
1da177e4 | 652 | { |
1da177e4 LT |
653 | list_del(&command->list); |
654 | sbp2util_free_command_dma(command); | |
655 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
1da177e4 LT |
656 | } |
657 | ||
abd559b1 JM |
658 | /* |
659 | * Is scsi_id valid? Is the 1394 node still present? | |
660 | */ | |
661 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
662 | { | |
663 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
664 | } | |
665 | ||
1da177e4 LT |
666 | /********************************************* |
667 | * IEEE-1394 core driver stack related section | |
668 | *********************************************/ | |
669 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
670 | ||
671 | static int sbp2_probe(struct device *dev) | |
672 | { | |
673 | struct unit_directory *ud; | |
674 | struct scsi_id_instance_data *scsi_id; | |
675 | ||
d024ebc6 | 676 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
677 | |
678 | ud = container_of(dev, struct unit_directory, device); | |
679 | ||
680 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
681 | * instead. */ | |
682 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
683 | return -ENODEV; | |
684 | ||
a237f35f | 685 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 686 | |
a237f35f SR |
687 | if (!scsi_id) |
688 | return -ENOMEM; | |
1da177e4 | 689 | |
a237f35f | 690 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 691 | |
a237f35f | 692 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
693 | } |
694 | ||
695 | static int sbp2_remove(struct device *dev) | |
696 | { | |
697 | struct unit_directory *ud; | |
698 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 699 | struct scsi_device *sdev; |
1da177e4 | 700 | |
d024ebc6 | 701 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
702 | |
703 | ud = container_of(dev, struct unit_directory, device); | |
704 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
705 | if (!scsi_id) |
706 | return 0; | |
707 | ||
bf637ec3 SR |
708 | if (scsi_id->scsi_host) { |
709 | /* Get rid of enqueued commands if there is no chance to | |
710 | * send them. */ | |
711 | if (!sbp2util_node_is_available(scsi_id)) | |
712 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
713 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
714 | * highlevel drivers which would deadlock if blocked. */ | |
abd559b1 | 715 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 716 | } |
abd559b1 JM |
717 | sdev = scsi_id->sdev; |
718 | if (sdev) { | |
719 | scsi_id->sdev = NULL; | |
720 | scsi_remove_device(sdev); | |
721 | } | |
1da177e4 LT |
722 | |
723 | sbp2_logout_device(scsi_id); | |
724 | sbp2_remove_device(scsi_id); | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | static int sbp2_update(struct unit_directory *ud) | |
730 | { | |
731 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
732 | ||
d024ebc6 | 733 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
734 | |
735 | if (sbp2_reconnect_device(scsi_id)) { | |
736 | ||
737 | /* | |
738 | * Ok, reconnect has failed. Perhaps we didn't | |
739 | * reconnect fast enough. Try doing a regular login, but | |
740 | * first do a logout just in case of any weirdness. | |
741 | */ | |
742 | sbp2_logout_device(scsi_id); | |
743 | ||
744 | if (sbp2_login_device(scsi_id)) { | |
745 | /* Login failed too, just fail, and the backend | |
746 | * will call our sbp2_remove for us */ | |
747 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
748 | return -EBUSY; | |
749 | } | |
750 | } | |
751 | ||
752 | /* Set max retries to something large on the device. */ | |
753 | sbp2_set_busy_timeout(scsi_id); | |
754 | ||
755 | /* Do a SBP-2 fetch agent reset. */ | |
756 | sbp2_agent_reset(scsi_id, 1); | |
757 | ||
758 | /* Get the max speed and packet size that we can use. */ | |
759 | sbp2_max_speed_and_size(scsi_id); | |
760 | ||
761 | /* Complete any pending commands with busy (so they get | |
762 | * retried) and remove them from our queue | |
763 | */ | |
764 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
765 | ||
766 | /* Make sure we unblock requests (since this is likely after a bus | |
767 | * reset). */ | |
768 | scsi_unblock_requests(scsi_id->scsi_host); | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | /* This functions is called by the sbp2_probe, for each new device. We now | |
774 | * allocate one scsi host for each scsi_id (unit directory). */ | |
775 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
776 | { | |
777 | struct sbp2scsi_host_info *hi; | |
778 | struct Scsi_Host *scsi_host = NULL; | |
779 | struct scsi_id_instance_data *scsi_id = NULL; | |
780 | ||
d024ebc6 | 781 | SBP2_DEBUG_ENTER(); |
1da177e4 | 782 | |
8551158a | 783 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
784 | if (!scsi_id) { |
785 | SBP2_ERR("failed to create scsi_id"); | |
786 | goto failed_alloc; | |
787 | } | |
1da177e4 LT |
788 | |
789 | scsi_id->ne = ud->ne; | |
790 | scsi_id->ud = ud; | |
791 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
792 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
6737231e | 793 | scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
794 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
795 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
796 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
797 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
1da177e4 LT |
798 | |
799 | ud->device.driver_data = scsi_id; | |
800 | ||
801 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
802 | if (!hi) { | |
803 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
804 | if (!hi) { | |
805 | SBP2_ERR("failed to allocate hostinfo"); | |
806 | goto failed_alloc; | |
807 | } | |
808 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
809 | hi->host = ud->ne->host; | |
810 | INIT_LIST_HEAD(&hi->scsi_ids); | |
811 | ||
1da177e4 LT |
812 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
813 | /* Handle data movement if physical dma is not | |
55664051 SR |
814 | * enabled or not supported on host controller */ |
815 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
816 | &sbp2_physdma_ops, | |
817 | 0x0ULL, 0xfffffffcULL)) { | |
818 | SBP2_ERR("failed to register lower 4GB address range"); | |
819 | goto failed_alloc; | |
820 | } | |
1da177e4 LT |
821 | #endif |
822 | } | |
823 | ||
147830f2 SR |
824 | /* Prevent unloading of the 1394 host */ |
825 | if (!try_module_get(hi->host->driver->owner)) { | |
826 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
827 | goto failed_alloc; | |
828 | } | |
829 | ||
1da177e4 LT |
830 | scsi_id->hi = hi; |
831 | ||
832 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
833 | ||
35bdddb8 SR |
834 | /* Register the status FIFO address range. We could use the same FIFO |
835 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
836 | * target in order to support multi-unit devices. |
837 | * The FIFO is located out of the local host controller's physical range | |
838 | * but, if possible, within the posted write area. Status writes will | |
839 | * then be performed as unified transactions. This slightly reduces | |
840 | * bandwidth usage, and some Prolific based devices seem to require it. | |
841 | */ | |
35bdddb8 SR |
842 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
843 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
844 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 845 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
6737231e | 846 | if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
847 | SBP2_ERR("failed to allocate status FIFO address range"); |
848 | goto failed_alloc; | |
849 | } | |
850 | ||
1da177e4 | 851 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 852 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 853 | sizeof(unsigned long)); |
1da177e4 LT |
854 | if (!scsi_host) { |
855 | SBP2_ERR("failed to register scsi host"); | |
856 | goto failed_alloc; | |
857 | } | |
858 | ||
859 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
860 | ||
861 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
862 | scsi_id->scsi_host = scsi_host; | |
863 | return scsi_id; | |
864 | } | |
865 | ||
866 | SBP2_ERR("failed to add scsi host"); | |
867 | scsi_host_put(scsi_host); | |
868 | ||
869 | failed_alloc: | |
870 | sbp2_remove_device(scsi_id); | |
871 | return NULL; | |
872 | } | |
873 | ||
1da177e4 LT |
874 | static void sbp2_host_reset(struct hpsb_host *host) |
875 | { | |
876 | struct sbp2scsi_host_info *hi; | |
877 | struct scsi_id_instance_data *scsi_id; | |
878 | ||
879 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
880 | ||
881 | if (hi) { | |
882 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
883 | scsi_block_requests(scsi_id->scsi_host); | |
884 | } | |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* |
888 | * This function is where we first pull the node unique ids, and then | |
889 | * allocate memory and register a SBP-2 device. | |
890 | */ | |
891 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
892 | { | |
893 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 894 | int error; |
1da177e4 | 895 | |
d024ebc6 | 896 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
897 | |
898 | /* Login FIFO DMA */ | |
899 | scsi_id->login_response = | |
a237f35f SR |
900 | pci_alloc_consistent(hi->host->pdev, |
901 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
902 | &scsi_id->login_response_dma); |
903 | if (!scsi_id->login_response) | |
904 | goto alloc_fail; | |
905 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
906 | ||
907 | /* Query logins ORB DMA */ | |
908 | scsi_id->query_logins_orb = | |
a237f35f SR |
909 | pci_alloc_consistent(hi->host->pdev, |
910 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
911 | &scsi_id->query_logins_orb_dma); |
912 | if (!scsi_id->query_logins_orb) | |
913 | goto alloc_fail; | |
914 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
915 | ||
916 | /* Query logins response DMA */ | |
917 | scsi_id->query_logins_response = | |
a237f35f SR |
918 | pci_alloc_consistent(hi->host->pdev, |
919 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
920 | &scsi_id->query_logins_response_dma); |
921 | if (!scsi_id->query_logins_response) | |
922 | goto alloc_fail; | |
923 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
924 | ||
925 | /* Reconnect ORB DMA */ | |
926 | scsi_id->reconnect_orb = | |
a237f35f SR |
927 | pci_alloc_consistent(hi->host->pdev, |
928 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
929 | &scsi_id->reconnect_orb_dma); |
930 | if (!scsi_id->reconnect_orb) | |
931 | goto alloc_fail; | |
932 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
933 | ||
934 | /* Logout ORB DMA */ | |
935 | scsi_id->logout_orb = | |
a237f35f SR |
936 | pci_alloc_consistent(hi->host->pdev, |
937 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
938 | &scsi_id->logout_orb_dma); |
939 | if (!scsi_id->logout_orb) | |
940 | goto alloc_fail; | |
941 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
942 | ||
943 | /* Login ORB DMA */ | |
944 | scsi_id->login_orb = | |
a237f35f SR |
945 | pci_alloc_consistent(hi->host->pdev, |
946 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 947 | &scsi_id->login_orb_dma); |
eaceec7f SR |
948 | if (!scsi_id->login_orb) |
949 | goto alloc_fail; | |
1da177e4 LT |
950 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
951 | ||
952 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
953 | ||
954 | /* | |
955 | * Create our command orb pool | |
956 | */ | |
957 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
958 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
959 | sbp2_remove_device(scsi_id); | |
960 | return -ENOMEM; | |
961 | } | |
962 | ||
963 | /* Schedule a timeout here. The reason is that we may be so close | |
964 | * to a bus reset, that the device is not available for logins. | |
965 | * This can happen when the bus reset is caused by the host | |
966 | * connected to the sbp2 device being removed. That host would | |
967 | * have a certain amount of time to relogin before the sbp2 device | |
968 | * allows someone else to login instead. One second makes sense. */ | |
969 | msleep_interruptible(1000); | |
970 | if (signal_pending(current)) { | |
1da177e4 LT |
971 | sbp2_remove_device(scsi_id); |
972 | return -EINTR; | |
973 | } | |
a237f35f | 974 | |
1da177e4 LT |
975 | /* |
976 | * Login to the sbp-2 device | |
977 | */ | |
978 | if (sbp2_login_device(scsi_id)) { | |
979 | /* Login failed, just remove the device. */ | |
980 | sbp2_remove_device(scsi_id); | |
981 | return -EBUSY; | |
982 | } | |
983 | ||
984 | /* | |
985 | * Set max retries to something large on the device | |
986 | */ | |
987 | sbp2_set_busy_timeout(scsi_id); | |
988 | ||
989 | /* | |
990 | * Do a SBP-2 fetch agent reset | |
991 | */ | |
992 | sbp2_agent_reset(scsi_id, 1); | |
993 | ||
994 | /* | |
995 | * Get the max speed and packet size that we can use | |
996 | */ | |
997 | sbp2_max_speed_and_size(scsi_id); | |
998 | ||
999 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
1000 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
1001 | if (error) { | |
1da177e4 | 1002 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
1003 | sbp2_logout_device(scsi_id); |
1004 | sbp2_remove_device(scsi_id); | |
146f7262 | 1005 | return error; |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | return 0; | |
eaceec7f SR |
1009 | |
1010 | alloc_fail: | |
1011 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
1012 | sbp2_remove_device(scsi_id); | |
1013 | return -ENOMEM; | |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | /* | |
1017 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
1018 | */ | |
1019 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
1020 | { | |
1021 | struct sbp2scsi_host_info *hi; | |
1022 | ||
d024ebc6 | 1023 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1024 | |
1025 | if (!scsi_id) | |
1026 | return; | |
1027 | ||
1028 | hi = scsi_id->hi; | |
1029 | ||
1030 | /* This will remove our scsi device aswell */ | |
1031 | if (scsi_id->scsi_host) { | |
1032 | scsi_remove_host(scsi_id->scsi_host); | |
1033 | scsi_host_put(scsi_id->scsi_host); | |
1034 | } | |
1035 | ||
1036 | sbp2util_remove_command_orb_pool(scsi_id); | |
1037 | ||
1038 | list_del(&scsi_id->scsi_list); | |
1039 | ||
1040 | if (scsi_id->login_response) { | |
1041 | pci_free_consistent(hi->host->pdev, | |
1042 | sizeof(struct sbp2_login_response), | |
1043 | scsi_id->login_response, | |
1044 | scsi_id->login_response_dma); | |
1045 | SBP2_DMA_FREE("single login FIFO"); | |
1046 | } | |
1047 | ||
1048 | if (scsi_id->login_orb) { | |
1049 | pci_free_consistent(hi->host->pdev, | |
1050 | sizeof(struct sbp2_login_orb), | |
1051 | scsi_id->login_orb, | |
1052 | scsi_id->login_orb_dma); | |
1053 | SBP2_DMA_FREE("single login ORB"); | |
1054 | } | |
1055 | ||
1056 | if (scsi_id->reconnect_orb) { | |
1057 | pci_free_consistent(hi->host->pdev, | |
1058 | sizeof(struct sbp2_reconnect_orb), | |
1059 | scsi_id->reconnect_orb, | |
1060 | scsi_id->reconnect_orb_dma); | |
1061 | SBP2_DMA_FREE("single reconnect orb"); | |
1062 | } | |
1063 | ||
1064 | if (scsi_id->logout_orb) { | |
1065 | pci_free_consistent(hi->host->pdev, | |
1066 | sizeof(struct sbp2_logout_orb), | |
1067 | scsi_id->logout_orb, | |
1068 | scsi_id->logout_orb_dma); | |
1069 | SBP2_DMA_FREE("single logout orb"); | |
1070 | } | |
1071 | ||
1072 | if (scsi_id->query_logins_orb) { | |
1073 | pci_free_consistent(hi->host->pdev, | |
1074 | sizeof(struct sbp2_query_logins_orb), | |
1075 | scsi_id->query_logins_orb, | |
1076 | scsi_id->query_logins_orb_dma); | |
1077 | SBP2_DMA_FREE("single query logins orb"); | |
1078 | } | |
1079 | ||
1080 | if (scsi_id->query_logins_response) { | |
1081 | pci_free_consistent(hi->host->pdev, | |
1082 | sizeof(struct sbp2_query_logins_response), | |
1083 | scsi_id->query_logins_response, | |
1084 | scsi_id->query_logins_response_dma); | |
1085 | SBP2_DMA_FREE("single query logins data"); | |
1086 | } | |
1087 | ||
6737231e | 1088 | if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 1089 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
6737231e | 1090 | scsi_id->status_fifo_addr); |
35bdddb8 | 1091 | |
1da177e4 LT |
1092 | scsi_id->ud->device.driver_data = NULL; |
1093 | ||
147830f2 SR |
1094 | if (hi) |
1095 | module_put(hi->host->driver->owner); | |
1096 | ||
1da177e4 LT |
1097 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
1098 | ||
1099 | kfree(scsi_id); | |
1100 | } | |
1101 | ||
1102 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1103 | /* | |
1104 | * This function deals with physical dma write requests (for adapters that do not support | |
1105 | * physical dma in hardware). Mostly just here for debugging... | |
1106 | */ | |
a237f35f SR |
1107 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1108 | int destid, quadlet_t *data, u64 addr, | |
1109 | size_t length, u16 flags) | |
1da177e4 LT |
1110 | { |
1111 | ||
a237f35f SR |
1112 | /* |
1113 | * Manually put the data in the right place. | |
1114 | */ | |
1115 | memcpy(bus_to_virt((u32) addr), data, length); | |
1116 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1117 | (u32) addr); | |
1118 | return RCODE_COMPLETE; | |
1da177e4 LT |
1119 | } |
1120 | ||
1121 | /* | |
1122 | * This function deals with physical dma read requests (for adapters that do not support | |
1123 | * physical dma in hardware). Mostly just here for debugging... | |
1124 | */ | |
a237f35f SR |
1125 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1126 | quadlet_t *data, u64 addr, size_t length, | |
1127 | u16 flags) | |
1da177e4 LT |
1128 | { |
1129 | ||
a237f35f SR |
1130 | /* |
1131 | * Grab data from memory and send a read response. | |
1132 | */ | |
1133 | memcpy(data, bus_to_virt((u32) addr), length); | |
1134 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1135 | (u32) addr); | |
1136 | return RCODE_COMPLETE; | |
1da177e4 LT |
1137 | } |
1138 | #endif | |
1139 | ||
1da177e4 LT |
1140 | /************************************** |
1141 | * SBP-2 protocol related section | |
1142 | **************************************/ | |
1143 | ||
1da177e4 LT |
1144 | /* |
1145 | * This function queries the device for the maximum concurrent logins it | |
1146 | * supports. | |
1147 | */ | |
1148 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1149 | { | |
1150 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1151 | quadlet_t data[2]; | |
1152 | int max_logins; | |
1153 | int active_logins; | |
1154 | ||
d024ebc6 | 1155 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1156 | |
1157 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1158 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1159 | ||
1160 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1161 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1162 | |
1163 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1164 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1165 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1166 | |
1167 | scsi_id->query_logins_orb->reserved_resp_length = | |
1168 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1169 | |
35bdddb8 SR |
1170 | scsi_id->query_logins_orb->status_fifo_hi = |
1171 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1172 | scsi_id->query_logins_orb->status_fifo_lo = | |
1173 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1174 | |
1175 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1176 | ||
1da177e4 LT |
1177 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
1178 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1179 | ||
1180 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1181 | |
1da177e4 LT |
1182 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1183 | data[1] = scsi_id->query_logins_orb_dma; | |
1184 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1185 | ||
1da177e4 | 1186 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 | 1187 | |
e8398bb7 | 1188 | if (sbp2util_access_timeout(scsi_id, 2*HZ)) { |
1da177e4 | 1189 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1190 | return -EIO; |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1194 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1195 | return -EIO; |
1da177e4 LT |
1196 | } |
1197 | ||
6065772d SR |
1198 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1199 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); | |
a237f35f | 1200 | return -EIO; |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1204 | ||
1205 | SBP2_DEBUG("length_max_logins = %x", | |
1206 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1207 | ||
1da177e4 | 1208 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
20f45781 | 1209 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 LT |
1210 | |
1211 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
20f45781 | 1212 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1213 | |
1214 | if (active_logins >= max_logins) { | |
a237f35f | 1215 | return -EIO; |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * This function is called in order to login to a particular SBP-2 device, | |
1223 | * after a bus reset. | |
1224 | */ | |
1225 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1226 | { | |
1227 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1228 | quadlet_t data[2]; | |
1229 | ||
d024ebc6 | 1230 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1231 | |
1232 | if (!scsi_id->login_orb) { | |
d024ebc6 | 1233 | SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__); |
a237f35f | 1234 | return -EIO; |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | if (!exclusive_login) { | |
1238 | if (sbp2_query_logins(scsi_id)) { | |
1239 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1240 | return -EIO; |
1da177e4 LT |
1241 | } |
1242 | } | |
1243 | ||
1244 | /* Set-up login ORB, assume no password */ | |
1245 | scsi_id->login_orb->password_hi = 0; | |
1246 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1247 | |
1248 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1249 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1250 | |
1251 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1252 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1253 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1254 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1255 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1256 | |
1257 | scsi_id->login_orb->passwd_resp_lengths = | |
1258 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1259 | |
35bdddb8 SR |
1260 | scsi_id->login_orb->status_fifo_hi = |
1261 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1262 | scsi_id->login_orb->status_fifo_lo = | |
1263 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1264 | |
1da177e4 LT |
1265 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1266 | ||
1da177e4 LT |
1267 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
1268 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1269 | ||
1da177e4 | 1270 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1271 | |
1da177e4 LT |
1272 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1273 | data[1] = scsi_id->login_orb_dma; | |
1274 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1275 | ||
1da177e4 | 1276 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1277 | |
1278 | /* | |
1279 | * Wait for login status (up to 20 seconds)... | |
1280 | */ | |
e8398bb7 SR |
1281 | if (sbp2util_access_timeout(scsi_id, 20*HZ)) { |
1282 | SBP2_ERR("Error logging into SBP-2 device - timed out"); | |
a237f35f | 1283 | return -EIO; |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | /* | |
1287 | * Sanity. Make sure status returned matches login orb. | |
1288 | */ | |
1289 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
6065772d | 1290 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1291 | return -EIO; |
1da177e4 LT |
1292 | } |
1293 | ||
6065772d SR |
1294 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1295 | SBP2_ERR("Error logging into SBP-2 device - failed"); | |
a237f35f | 1296 | return -EIO; |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | /* | |
1300 | * Byte swap the login response, for use when reconnecting or | |
1301 | * logging out. | |
1302 | */ | |
1303 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1304 | ||
1305 | /* | |
1306 | * Grab our command block agent address from the login response. | |
1307 | */ | |
1308 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1309 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1310 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1311 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1312 | ||
1313 | scsi_id->sbp2_command_block_agent_addr = | |
1314 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1315 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1316 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1317 | ||
1318 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1319 | return 0; |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | /* | |
1323 | * This function is called in order to logout from a particular SBP-2 | |
1324 | * device, usually called during driver unload. | |
1325 | */ | |
1326 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1327 | { | |
1328 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1329 | quadlet_t data[2]; | |
1330 | int error; | |
1331 | ||
d024ebc6 | 1332 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1333 | |
1334 | /* | |
1335 | * Set-up logout ORB | |
1336 | */ | |
1337 | scsi_id->logout_orb->reserved1 = 0x0; | |
1338 | scsi_id->logout_orb->reserved2 = 0x0; | |
1339 | scsi_id->logout_orb->reserved3 = 0x0; | |
1340 | scsi_id->logout_orb->reserved4 = 0x0; | |
1341 | ||
1342 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1343 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1344 | ||
1345 | /* Notify us when complete */ | |
1346 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1347 | ||
1348 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1349 | scsi_id->logout_orb->status_fifo_hi = |
1350 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1351 | scsi_id->logout_orb->status_fifo_lo = | |
1352 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1353 | |
1354 | /* | |
1355 | * Byte swap ORB if necessary | |
1356 | */ | |
1357 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1358 | ||
1359 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1360 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1361 | ||
1362 | /* | |
1363 | * Ok, let's write to the target's management agent register | |
1364 | */ | |
1365 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1366 | data[1] = scsi_id->logout_orb_dma; | |
1367 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1368 | ||
1da177e4 | 1369 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1370 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1371 | if (error) |
1372 | return error; | |
1373 | ||
1374 | /* Wait for device to logout...1 second. */ | |
e8398bb7 | 1375 | if (sbp2util_access_timeout(scsi_id, HZ)) |
1da177e4 LT |
1376 | return -EIO; |
1377 | ||
1378 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1379 | return 0; |
1da177e4 LT |
1380 | } |
1381 | ||
1382 | /* | |
1383 | * This function is called in order to reconnect to a particular SBP-2 | |
1384 | * device, after a bus reset. | |
1385 | */ | |
1386 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1387 | { | |
1388 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1389 | quadlet_t data[2]; | |
1390 | int error; | |
1391 | ||
d024ebc6 | 1392 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1393 | |
1394 | /* | |
1395 | * Set-up reconnect ORB | |
1396 | */ | |
1397 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1398 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1399 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1400 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1401 | ||
1402 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1403 | scsi_id->reconnect_orb->login_ID_misc |= | |
1404 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1405 | ||
1406 | /* Notify us when complete */ | |
1407 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1408 | ||
1409 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1410 | scsi_id->reconnect_orb->status_fifo_hi = |
1411 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1412 | scsi_id->reconnect_orb->status_fifo_lo = | |
1413 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1414 | |
1415 | /* | |
1416 | * Byte swap ORB if necessary | |
1417 | */ | |
1418 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1419 | ||
1420 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1421 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1422 | ||
1da177e4 LT |
1423 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1424 | data[1] = scsi_id->reconnect_orb_dma; | |
1425 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1426 | ||
1da177e4 | 1427 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1428 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1429 | if (error) |
1430 | return error; | |
1431 | ||
1432 | /* | |
1433 | * Wait for reconnect status (up to 1 second)... | |
1434 | */ | |
e8398bb7 SR |
1435 | if (sbp2util_access_timeout(scsi_id, HZ)) { |
1436 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); | |
a237f35f | 1437 | return -EIO; |
1da177e4 LT |
1438 | } |
1439 | ||
1440 | /* | |
1441 | * Sanity. Make sure status returned matches reconnect orb. | |
1442 | */ | |
1443 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
6065772d | 1444 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1445 | return -EIO; |
1da177e4 LT |
1446 | } |
1447 | ||
6065772d SR |
1448 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1449 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); | |
a237f35f | 1450 | return -EIO; |
1da177e4 LT |
1451 | } |
1452 | ||
1453 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
a237f35f | 1454 | return 0; |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | /* | |
1458 | * This function is called in order to set the busy timeout (number of | |
1459 | * retries to attempt) on the sbp2 device. | |
1460 | */ | |
1461 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1462 | { | |
1463 | quadlet_t data; | |
1464 | ||
d024ebc6 | 1465 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1466 | |
1da177e4 | 1467 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1468 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1469 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1470 | return 0; |
1da177e4 LT |
1471 | } |
1472 | ||
1da177e4 LT |
1473 | /* |
1474 | * This function is called to parse sbp2 device's config rom unit | |
1475 | * directory. Used to determine things like sbp2 management agent offset, | |
1476 | * and command set used (SCSI or RBC). | |
1477 | */ | |
1478 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1479 | struct unit_directory *ud) | |
1480 | { | |
1481 | struct csr1212_keyval *kv; | |
1482 | struct csr1212_dentry *dentry; | |
1483 | u64 management_agent_addr; | |
1484 | u32 command_set_spec_id, command_set, unit_characteristics, | |
24d3bf88 SR |
1485 | firmware_revision; |
1486 | unsigned workarounds; | |
1da177e4 LT |
1487 | int i; |
1488 | ||
d024ebc6 | 1489 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1490 | |
1491 | management_agent_addr = 0x0; | |
1492 | command_set_spec_id = 0x0; | |
1493 | command_set = 0x0; | |
1494 | unit_characteristics = 0x0; | |
1495 | firmware_revision = 0x0; | |
1496 | ||
1497 | /* Handle different fields in the unit directory, based on keys */ | |
1498 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1499 | switch (kv->key.id) { | |
1500 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1501 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1502 | /* Save off the management agent address */ | |
1503 | management_agent_addr = | |
a237f35f SR |
1504 | CSR1212_REGISTER_SPACE_BASE + |
1505 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1506 | |
1507 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1508 | (unsigned int)management_agent_addr); |
1da177e4 | 1509 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1510 | scsi_id->sbp2_lun = |
1511 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1512 | } |
1513 | break; | |
1514 | ||
1515 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1516 | /* Command spec organization */ | |
1517 | command_set_spec_id = kv->value.immediate; | |
1518 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1519 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1520 | break; |
1521 | ||
1522 | case SBP2_COMMAND_SET_KEY: | |
1523 | /* Command set used by sbp2 device */ | |
1524 | command_set = kv->value.immediate; | |
1525 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1526 | (unsigned int)command_set); |
1da177e4 LT |
1527 | break; |
1528 | ||
1529 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1530 | /* | |
1531 | * Unit characterisitcs (orb related stuff | |
1532 | * that I'm not yet paying attention to) | |
1533 | */ | |
1534 | unit_characteristics = kv->value.immediate; | |
1535 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1536 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1537 | break; |
1538 | ||
1539 | case SBP2_FIRMWARE_REVISION_KEY: | |
1540 | /* Firmware revision */ | |
1541 | firmware_revision = kv->value.immediate; | |
24d3bf88 SR |
1542 | SBP2_DEBUG("sbp2_firmware_revision = %x", |
1543 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1544 | break; |
1545 | ||
1546 | default: | |
1547 | break; | |
1548 | } | |
1549 | } | |
1550 | ||
24d3bf88 | 1551 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1552 | |
679c0cd2 SR |
1553 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1554 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
1555 | if (sbp2_workarounds_table[i].firmware_revision && | |
1556 | sbp2_workarounds_table[i].firmware_revision != | |
1557 | (firmware_revision & 0xffff00)) | |
1558 | continue; | |
1559 | if (sbp2_workarounds_table[i].model_id && | |
1560 | sbp2_workarounds_table[i].model_id != ud->model_id) | |
1561 | continue; | |
1562 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1563 | break; | |
1564 | } | |
1da177e4 | 1565 | |
24d3bf88 | 1566 | if (workarounds) |
e9a1c52c SR |
1567 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1568 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1569 | " model_id 0x%06x)", | |
24d3bf88 | 1570 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1571 | workarounds, firmware_revision, |
1572 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1573 | ud->model_id); | |
24d3bf88 SR |
1574 | |
1575 | /* We would need one SCSI host template for each target to adjust | |
1576 | * max_sectors on the fly, therefore warn only. */ | |
1577 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
1578 | (max_sectors * 512) > (128 * 1024)) | |
1579 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB " | |
1580 | "max transfer size. WARNING: Current max_sectors " | |
1581 | "setting is larger than 128KB (%d sectors)", | |
1582 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1583 | max_sectors); | |
1584 | ||
1da177e4 LT |
1585 | /* If this is a logical unit directory entry, process the parent |
1586 | * to get the values. */ | |
1587 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1588 | struct unit_directory *parent_ud = | |
1589 | container_of(ud->device.parent, struct unit_directory, device); | |
1590 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1591 | } else { | |
1592 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1593 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1594 | scsi_id->sbp2_command_set = command_set; | |
1595 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1596 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1597 | scsi_id->workarounds = workarounds; | |
1598 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1599 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1600 | } |
1601 | } | |
1602 | ||
fd23ade8 BC |
1603 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1604 | ||
1da177e4 LT |
1605 | /* |
1606 | * This function is called in order to determine the max speed and packet | |
1607 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1608 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1609 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1610 | * device decides the actual maximum data it can transfer. We just tell it | |
1611 | * the speed that it needs to use, and the max_rec the host supports, and | |
1612 | * it takes care of the rest. | |
1613 | */ | |
1614 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1615 | { | |
1616 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
fd23ade8 | 1617 | u8 payload; |
1da177e4 | 1618 | |
d024ebc6 | 1619 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1620 | |
a237f35f | 1621 | scsi_id->speed_code = |
647dcb5f | 1622 | hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
1da177e4 LT |
1623 | |
1624 | /* Bump down our speed if the user requested it */ | |
1625 | if (scsi_id->speed_code > max_speed) { | |
1626 | scsi_id->speed_code = max_speed; | |
1627 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1628 | hpsb_speedto_str[scsi_id->speed_code]); | |
1629 | } | |
1630 | ||
1631 | /* Payload size is the lesser of what our speed supports and what | |
1632 | * our host supports. */ | |
fd23ade8 BC |
1633 | payload = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
1634 | (u8) (hi->host->csr.max_rec - 1)); | |
1635 | ||
1636 | /* If physical DMA is off, work around limitation in ohci1394: | |
1637 | * packet size must not exceed PAGE_SIZE */ | |
1638 | if (scsi_id->ne->host->low_addr_space < (1ULL << 32)) | |
1639 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && | |
1640 | payload) | |
1641 | payload--; | |
1da177e4 LT |
1642 | |
1643 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1644 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1645 | hpsb_speedto_str[scsi_id->speed_code], | |
fd23ade8 | 1646 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1647 | |
fd23ade8 | 1648 | scsi_id->max_payload_size = payload; |
a237f35f | 1649 | return 0; |
1da177e4 LT |
1650 | } |
1651 | ||
1652 | /* | |
1653 | * This function is called in order to perform a SBP-2 agent reset. | |
1654 | */ | |
1655 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1656 | { | |
1657 | quadlet_t data; | |
1658 | u64 addr; | |
1659 | int retval; | |
cc078189 | 1660 | unsigned long flags; |
1da177e4 | 1661 | |
d024ebc6 | 1662 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1663 | |
1da177e4 LT |
1664 | data = ntohl(SBP2_AGENT_RESET_DATA); |
1665 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1666 | ||
1667 | if (wait) | |
1668 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1669 | else | |
1670 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1671 | ||
1672 | if (retval < 0) { | |
1673 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1674 | return -EIO; | |
1675 | } | |
1676 | ||
1677 | /* | |
1678 | * Need to make sure orb pointer is written on next command | |
1679 | */ | |
cc078189 | 1680 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1681 | scsi_id->last_orb = NULL; |
cc078189 | 1682 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1683 | |
a237f35f | 1684 | return 0; |
1da177e4 LT |
1685 | } |
1686 | ||
cf8d2c09 SR |
1687 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1688 | struct sbp2scsi_host_info *hi, | |
1689 | struct sbp2_command_info *command, | |
1690 | unsigned int scsi_use_sg, | |
1691 | struct scatterlist *sgpnt, | |
1692 | u32 orb_direction, | |
1693 | enum dma_data_direction dma_dir) | |
1694 | { | |
1695 | command->dma_dir = dma_dir; | |
1696 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1697 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1698 | ||
1699 | /* Special case if only one element (and less than 64KB in size) */ | |
1700 | if ((scsi_use_sg == 1) && | |
1701 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1702 | ||
1703 | SBP2_DEBUG("Only one s/g element"); | |
1704 | command->dma_size = sgpnt[0].length; | |
1705 | command->dma_type = CMD_DMA_PAGE; | |
1706 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1707 | sgpnt[0].page, | |
1708 | sgpnt[0].offset, | |
1709 | command->dma_size, | |
1710 | command->dma_dir); | |
1711 | SBP2_DMA_ALLOC("single page scatter element"); | |
1712 | ||
1713 | orb->data_descriptor_lo = command->cmd_dma; | |
1714 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1715 | ||
1716 | } else { | |
1717 | struct sbp2_unrestricted_page_table *sg_element = | |
1718 | &command->scatter_gather_element[0]; | |
1719 | u32 sg_count, sg_len; | |
1720 | dma_addr_t sg_addr; | |
1721 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1722 | dma_dir); | |
1723 | ||
1724 | SBP2_DMA_ALLOC("scatter list"); | |
1725 | ||
1726 | command->dma_size = scsi_use_sg; | |
1727 | command->sge_buffer = sgpnt; | |
1728 | ||
1729 | /* use page tables (s/g) */ | |
1730 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1731 | orb->data_descriptor_lo = command->sge_dma; | |
1732 | ||
1733 | /* | |
1734 | * Loop through and fill out our sbp-2 page tables | |
1735 | * (and split up anything too large) | |
1736 | */ | |
1737 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1738 | sg_len = sg_dma_len(sgpnt); | |
1739 | sg_addr = sg_dma_address(sgpnt); | |
1740 | while (sg_len) { | |
1741 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1742 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1743 | sg_element[sg_count].length_segment_base_hi = | |
1744 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1745 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1746 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1747 | } else { | |
1748 | sg_element[sg_count].length_segment_base_hi = | |
1749 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1750 | sg_len = 0; | |
1751 | } | |
1752 | sg_count++; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | /* Number of page table (s/g) elements */ | |
1757 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1758 | ||
1759 | sbp2util_packet_dump(sg_element, | |
1760 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1761 | "sbp2 s/g list", command->sge_dma); | |
1762 | ||
1763 | /* Byte swap page tables if necessary */ | |
1764 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1765 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1766 | sg_count); | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1771 | struct sbp2scsi_host_info *hi, | |
1772 | struct sbp2_command_info *command, | |
1773 | struct scatterlist *sgpnt, | |
1774 | u32 orb_direction, | |
1775 | unsigned int scsi_request_bufflen, | |
1776 | void *scsi_request_buffer, | |
1777 | enum dma_data_direction dma_dir) | |
1778 | { | |
1779 | command->dma_dir = dma_dir; | |
1780 | command->dma_size = scsi_request_bufflen; | |
1781 | command->dma_type = CMD_DMA_SINGLE; | |
1782 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1783 | command->dma_size, command->dma_dir); | |
1784 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1785 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1786 | ||
1787 | SBP2_DMA_ALLOC("single bulk"); | |
1788 | ||
1789 | /* | |
1790 | * Handle case where we get a command w/o s/g enabled (but | |
1791 | * check for transfers larger than 64K) | |
1792 | */ | |
1793 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1794 | ||
1795 | orb->data_descriptor_lo = command->cmd_dma; | |
1796 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1797 | ||
1798 | } else { | |
1799 | struct sbp2_unrestricted_page_table *sg_element = | |
1800 | &command->scatter_gather_element[0]; | |
1801 | u32 sg_count, sg_len; | |
1802 | dma_addr_t sg_addr; | |
1803 | ||
1804 | /* | |
1805 | * Need to turn this into page tables, since the | |
1806 | * buffer is too large. | |
1807 | */ | |
1808 | orb->data_descriptor_lo = command->sge_dma; | |
1809 | ||
1810 | /* Use page tables (s/g) */ | |
1811 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1812 | ||
1813 | /* | |
1814 | * fill out our sbp-2 page tables (and split up | |
1815 | * the large buffer) | |
1816 | */ | |
1817 | sg_count = 0; | |
1818 | sg_len = scsi_request_bufflen; | |
1819 | sg_addr = command->cmd_dma; | |
1820 | while (sg_len) { | |
1821 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1822 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1823 | sg_element[sg_count].length_segment_base_hi = | |
1824 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1825 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1826 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1827 | } else { | |
1828 | sg_element[sg_count].length_segment_base_hi = | |
1829 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1830 | sg_len = 0; | |
1831 | } | |
1832 | sg_count++; | |
1833 | } | |
1834 | ||
1835 | /* Number of page table (s/g) elements */ | |
1836 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1837 | ||
1838 | sbp2util_packet_dump(sg_element, | |
1839 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1840 | "sbp2 s/g list", command->sge_dma); | |
1841 | ||
1842 | /* Byte swap page tables if necessary */ | |
1843 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1844 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1845 | sg_count); | |
1846 | } | |
1847 | } | |
1848 | ||
1da177e4 LT |
1849 | /* |
1850 | * This function is called to create the actual command orb and s/g list | |
1851 | * out of the scsi command itself. | |
1852 | */ | |
cf8d2c09 SR |
1853 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1854 | struct sbp2_command_info *command, | |
1855 | unchar *scsi_cmd, | |
1856 | unsigned int scsi_use_sg, | |
1857 | unsigned int scsi_request_bufflen, | |
1858 | void *scsi_request_buffer, | |
1859 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1860 | { |
1861 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1862 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1863 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1864 | u32 orb_direction; |
1da177e4 LT |
1865 | |
1866 | /* | |
1867 | * Set-up our command ORB.. | |
1868 | * | |
1869 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1870 | * best performance (at least with the devices I have). This means | |
1871 | * that data_size becomes the number of s/g elements, and | |
1872 | * page_size should be zero (for unrestricted). | |
1873 | */ | |
1874 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1875 | command_orb->next_ORB_lo = 0x0; | |
1876 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1877 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1878 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1879 | |
43863eba | 1880 | if (dma_dir == DMA_NONE) |
a237f35f | 1881 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1882 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1883 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1884 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1885 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1886 | else { |
1887 | SBP2_WARN("Falling back to DMA_NONE"); | |
1888 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1889 | } |
1890 | ||
cf8d2c09 | 1891 | /* Set-up our pagetable stuff */ |
1da177e4 | 1892 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1893 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1894 | command_orb->data_descriptor_hi = 0x0; |
1895 | command_orb->data_descriptor_lo = 0x0; | |
1896 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1897 | } else if (scsi_use_sg) { |
1da177e4 | 1898 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1899 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1900 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1901 | } else { |
1da177e4 | 1902 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1903 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1904 | orb_direction, scsi_request_bufflen, | |
1905 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1906 | } |
1907 | ||
cf8d2c09 | 1908 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1909 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1910 | ||
cf8d2c09 | 1911 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1912 | memset(command_orb->cdb, 0, 12); |
1913 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | /* | |
1917 | * This function is called in order to begin a regular SBP-2 command. | |
1918 | */ | |
28212767 | 1919 | static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
1920 | struct sbp2_command_info *command) |
1921 | { | |
1922 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1923 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
cc078189 SR |
1924 | struct sbp2_command_orb *last_orb; |
1925 | dma_addr_t last_orb_dma; | |
1926 | u64 addr = scsi_id->sbp2_command_block_agent_addr; | |
1927 | quadlet_t data[2]; | |
1928 | size_t length; | |
1929 | unsigned long flags; | |
1da177e4 LT |
1930 | |
1931 | outstanding_orb_incr; | |
1932 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1933 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1934 | |
1935 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1936 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1937 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1938 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
1939 | sizeof(command->scatter_gather_element), | |
1940 | PCI_DMA_BIDIRECTIONAL); | |
1941 | /* | |
1942 | * Check to see if there are any previous orbs to use | |
1943 | */ | |
cc078189 SR |
1944 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1945 | last_orb = scsi_id->last_orb; | |
1946 | last_orb_dma = scsi_id->last_orb_dma; | |
1947 | if (!last_orb) { | |
1da177e4 | 1948 | /* |
cc078189 SR |
1949 | * last_orb == NULL means: We know that the target's fetch agent |
1950 | * is not active right now. | |
1da177e4 | 1951 | */ |
cc078189 | 1952 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 LT |
1953 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1954 | data[1] = command->command_orb_dma; | |
1955 | sbp2util_cpu_to_be32_buffer(data, 8); | |
cc078189 | 1956 | length = 8; |
1da177e4 | 1957 | } else { |
1da177e4 | 1958 | /* |
cc078189 SR |
1959 | * last_orb != NULL means: We know that the target's fetch agent |
1960 | * is (very probably) not dead or in reset state right now. | |
1961 | * We have an ORB already sent that we can append a new one to. | |
1962 | * The target's fetch agent may or may not have read this | |
1963 | * previous ORB yet. | |
1da177e4 | 1964 | */ |
cc078189 SR |
1965 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
1966 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1967 | PCI_DMA_TODEVICE); |
cc078189 SR |
1968 | last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); |
1969 | wmb(); | |
1da177e4 | 1970 | /* Tells hardware that this pointer is valid */ |
cc078189 SR |
1971 | last_orb->next_ORB_hi = 0; |
1972 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, | |
1da177e4 | 1973 | sizeof(struct sbp2_command_orb), |
d4018d7f | 1974 | PCI_DMA_TODEVICE); |
cc078189 SR |
1975 | addr += SBP2_DOORBELL_OFFSET; |
1976 | data[0] = 0; | |
1977 | length = 4; | |
1978 | } | |
1979 | scsi_id->last_orb = command_orb; | |
1980 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1981 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
1da177e4 | 1982 | |
cc078189 SR |
1983 | SBP2_ORB_DEBUG("write to %s register, command orb %p", |
1984 | last_orb ? "DOORBELL" : "ORB_POINTER", command_orb); | |
28212767 | 1985 | if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) |
cc078189 | 1986 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); |
28212767 | 1987 | /* We rely on SCSI EH to deal with _node_write_ failures. */ |
1da177e4 LT |
1988 | } |
1989 | ||
1990 | /* | |
1991 | * This function is called in order to begin a regular SBP-2 command. | |
1992 | */ | |
1993 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
1994 | struct scsi_cmnd *SCpnt, | |
1995 | void (*done)(struct scsi_cmnd *)) | |
1996 | { | |
1997 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
1998 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
1999 | struct sbp2_command_info *command; | |
2000 | ||
d024ebc6 | 2001 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2002 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
2003 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2004 | ||
2005 | /* | |
2006 | * Allocate a command orb and s/g structure | |
2007 | */ | |
2008 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2009 | if (!command) { | |
a237f35f | 2010 | return -EIO; |
1da177e4 LT |
2011 | } |
2012 | ||
1da177e4 LT |
2013 | /* |
2014 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2015 | */ | |
2016 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2017 | request_bufflen, SCpnt->request_buffer, | |
2018 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2019 | |
2020 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2021 | "sbp2 command orb", command->command_orb_dma); | |
2022 | ||
1da177e4 LT |
2023 | /* |
2024 | * Link up the orb, and ring the doorbell if needed | |
2025 | */ | |
2026 | sbp2_link_orb_command(scsi_id, command); | |
2027 | ||
a237f35f | 2028 | return 0; |
1da177e4 LT |
2029 | } |
2030 | ||
1da177e4 LT |
2031 | /* |
2032 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2033 | */ | |
2034 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2035 | { | |
d024ebc6 | 2036 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2037 | |
2038 | /* | |
2039 | * Ok, it's pretty ugly... ;-) | |
2040 | */ | |
2041 | sense_data[0] = 0x70; | |
2042 | sense_data[1] = 0x0; | |
2043 | sense_data[2] = sbp2_status[9]; | |
2044 | sense_data[3] = sbp2_status[12]; | |
2045 | sense_data[4] = sbp2_status[13]; | |
2046 | sense_data[5] = sbp2_status[14]; | |
2047 | sense_data[6] = sbp2_status[15]; | |
2048 | sense_data[7] = 10; | |
2049 | sense_data[8] = sbp2_status[16]; | |
2050 | sense_data[9] = sbp2_status[17]; | |
2051 | sense_data[10] = sbp2_status[18]; | |
2052 | sense_data[11] = sbp2_status[19]; | |
2053 | sense_data[12] = sbp2_status[10]; | |
2054 | sense_data[13] = sbp2_status[11]; | |
2055 | sense_data[14] = sbp2_status[20]; | |
2056 | sense_data[15] = sbp2_status[21]; | |
2057 | ||
a237f35f | 2058 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2059 | } |
2060 | ||
1da177e4 LT |
2061 | /* |
2062 | * This function deals with status writes from the SBP-2 device | |
2063 | */ | |
3e98eab4 SR |
2064 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
2065 | int destid, quadlet_t *data, u64 addr, | |
2066 | size_t length, u16 fl) | |
1da177e4 LT |
2067 | { |
2068 | struct sbp2scsi_host_info *hi; | |
2069 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 | 2070 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 2071 | struct sbp2_status_block *sb; |
1da177e4 LT |
2072 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
2073 | struct sbp2_command_info *command; | |
79456197 | 2074 | unsigned long flags; |
1da177e4 | 2075 | |
d024ebc6 | 2076 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2077 | |
2078 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2079 | ||
6065772d SR |
2080 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
2081 | SBP2_ERR("Wrong size of status block"); | |
2082 | return RCODE_ADDRESS_ERROR; | |
2083 | } | |
2084 | if (unlikely(!host)) { | |
1da177e4 | 2085 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 2086 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2087 | } |
1da177e4 | 2088 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 2089 | if (unlikely(!hi)) { |
1da177e4 | 2090 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 2091 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2092 | } |
1da177e4 | 2093 | /* |
35bdddb8 SR |
2094 | * Find our scsi_id structure by looking at the status fifo address |
2095 | * written to by the sbp2 device. | |
1da177e4 | 2096 | */ |
1da177e4 | 2097 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2098 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2099 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2100 | scsi_id = scsi_id_tmp; |
2101 | break; | |
2102 | } | |
2103 | } | |
6065772d | 2104 | if (unlikely(!scsi_id)) { |
1da177e4 | 2105 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
a237f35f | 2106 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2107 | } |
2108 | ||
2109 | /* | |
3e98eab4 SR |
2110 | * Put response into scsi_id status fifo buffer. The first two bytes |
2111 | * come in big endian bit order. Often the target writes only a | |
2112 | * truncated status block, minimally the first two quadlets. The rest | |
2113 | * is implied to be zeros. | |
1da177e4 | 2114 | */ |
3e98eab4 SR |
2115 | sb = &scsi_id->status_block; |
2116 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); | |
2117 | memcpy(sb, data, length); | |
2118 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 LT |
2119 | |
2120 | /* | |
6065772d | 2121 | * Ignore unsolicited status. Handle command ORB status. |
1da177e4 | 2122 | */ |
6065772d SR |
2123 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
2124 | command = NULL; | |
2125 | else | |
2126 | command = sbp2util_find_command_for_orb(scsi_id, | |
2127 | sb->ORB_offset_lo); | |
1da177e4 | 2128 | if (command) { |
1da177e4 LT |
2129 | SBP2_DEBUG("Found status for command ORB"); |
2130 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2131 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2132 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2133 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2134 | sizeof(command->scatter_gather_element), | |
2135 | PCI_DMA_BIDIRECTIONAL); | |
2136 | ||
2137 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2138 | outstanding_orb_decr; | |
2139 | ||
2140 | /* | |
3e98eab4 SR |
2141 | * Matched status with command, now grab scsi command pointers |
2142 | * and check status. | |
1da177e4 | 2143 | */ |
6065772d SR |
2144 | /* |
2145 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
2146 | * not be reused until status for a subsequent ORB is received. | |
2147 | */ | |
1da177e4 | 2148 | SCpnt = command->Current_SCpnt; |
24c7cd06 | 2149 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 2150 | sbp2util_mark_command_completed(scsi_id, command); |
24c7cd06 | 2151 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2152 | |
2153 | if (SCpnt) { | |
6065772d SR |
2154 | if (STATUS_TEST_RS(sb->ORB_offset_hi_misc)) |
2155 | scsi_status = | |
2156 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; | |
1da177e4 | 2157 | /* |
3e98eab4 | 2158 | * See if the target stored any scsi status information. |
1da177e4 | 2159 | */ |
6065772d | 2160 | if (STATUS_GET_LEN(sb->ORB_offset_hi_misc) > 1) { |
1da177e4 | 2161 | SBP2_DEBUG("CHECK CONDITION"); |
3e98eab4 SR |
2162 | scsi_status = sbp2_status_to_sense_data( |
2163 | (unchar *)sb, SCpnt->sense_buffer); | |
1da177e4 LT |
2164 | } |
2165 | ||
2166 | /* | |
3e98eab4 SR |
2167 | * Check to see if the dead bit is set. If so, we'll |
2168 | * have to initiate a fetch agent reset. | |
1da177e4 | 2169 | */ |
6065772d | 2170 | if (STATUS_TEST_D(sb->ORB_offset_hi_misc)) { |
3e98eab4 SR |
2171 | SBP2_DEBUG("Dead bit set - " |
2172 | "initiating fetch agent reset"); | |
1da177e4 LT |
2173 | sbp2_agent_reset(scsi_id, 0); |
2174 | } | |
2175 | ||
2176 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2177 | } | |
2178 | ||
2179 | /* | |
cc078189 SR |
2180 | * Check here to see if there are no commands in-use. If there |
2181 | * are none, we know that the fetch agent left the active state | |
2182 | * _and_ that we did not reactivate it yet. Therefore clear | |
2183 | * last_orb so that next time we write directly to the | |
2184 | * ORB_POINTER register. That way the fetch agent does not need | |
2185 | * to refetch the next_ORB. | |
1da177e4 | 2186 | */ |
79456197 | 2187 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
cc078189 | 2188 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) |
1da177e4 | 2189 | scsi_id->last_orb = NULL; |
79456197 | 2190 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2191 | |
2192 | } else { | |
1da177e4 LT |
2193 | /* |
2194 | * It's probably a login/logout/reconnect status. | |
2195 | */ | |
3e98eab4 SR |
2196 | if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || |
2197 | (sb->ORB_offset_lo == scsi_id->login_orb_dma) || | |
2198 | (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || | |
e8398bb7 SR |
2199 | (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { |
2200 | scsi_id->access_complete = 1; | |
2201 | wake_up_interruptible(&access_wq); | |
2202 | } | |
1da177e4 LT |
2203 | } |
2204 | ||
2205 | if (SCpnt) { | |
1da177e4 LT |
2206 | SBP2_DEBUG("Completing SCSI command"); |
2207 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2208 | command->Current_done); | |
2209 | SBP2_ORB_DEBUG("command orb completed"); | |
2210 | } | |
2211 | ||
a237f35f | 2212 | return RCODE_COMPLETE; |
1da177e4 LT |
2213 | } |
2214 | ||
1da177e4 LT |
2215 | /************************************** |
2216 | * SCSI interface related section | |
2217 | **************************************/ | |
2218 | ||
2219 | /* | |
2220 | * This routine is the main request entry routine for doing I/O. It is | |
2221 | * called from the scsi stack directly. | |
2222 | */ | |
2223 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2224 | void (*done)(struct scsi_cmnd *)) | |
2225 | { | |
2226 | struct scsi_id_instance_data *scsi_id = | |
2227 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2228 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2229 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 2230 | |
d024ebc6 SR |
2231 | SBP2_DEBUG_ENTER(); |
2232 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2233 | scsi_print_command(SCpnt); | |
2234 | #endif | |
1da177e4 | 2235 | |
abd559b1 JM |
2236 | if (!sbp2util_node_is_available(scsi_id)) |
2237 | goto done; | |
1da177e4 LT |
2238 | |
2239 | hi = scsi_id->hi; | |
2240 | ||
2241 | if (!hi) { | |
2242 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2243 | goto done; |
1da177e4 LT |
2244 | } |
2245 | ||
2246 | /* | |
2247 | * Until we handle multiple luns, just return selection time-out | |
2248 | * to any IO directed at non-zero LUNs | |
2249 | */ | |
abd559b1 JM |
2250 | if (SCpnt->device->lun) |
2251 | goto done; | |
1da177e4 LT |
2252 | |
2253 | /* | |
2254 | * Check for request sense command, and handle it here | |
2255 | * (autorequest sense) | |
2256 | */ | |
2257 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2258 | SBP2_DEBUG("REQUEST_SENSE"); | |
2259 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2260 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2261 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2262 | return 0; |
1da177e4 LT |
2263 | } |
2264 | ||
2265 | /* | |
2266 | * Check to see if we are in the middle of a bus reset. | |
2267 | */ | |
2268 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2269 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2270 | result = DID_BUS_BUSY << 16; |
2271 | goto done; | |
1da177e4 LT |
2272 | } |
2273 | ||
43863eba SR |
2274 | /* |
2275 | * Bidirectional commands are not yet implemented, | |
2276 | * and unknown transfer direction not handled. | |
2277 | */ | |
2278 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2279 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2280 | result = DID_ERROR << 16; | |
2281 | goto done; | |
2282 | } | |
2283 | ||
1da177e4 LT |
2284 | /* |
2285 | * Try and send our SCSI command | |
2286 | */ | |
2287 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2288 | SBP2_ERR("Error sending SCSI command"); | |
2289 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2290 | SCpnt, done); | |
2291 | } | |
abd559b1 | 2292 | return 0; |
1da177e4 | 2293 | |
abd559b1 JM |
2294 | done: |
2295 | SCpnt->result = result; | |
2296 | done(SCpnt); | |
2297 | return 0; | |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | /* | |
2301 | * This function is called in order to complete all outstanding SBP-2 | |
2302 | * commands (in case of resets, etc.). | |
2303 | */ | |
2304 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2305 | u32 status) | |
2306 | { | |
2307 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2308 | struct list_head *lh; | |
2309 | struct sbp2_command_info *command; | |
79456197 | 2310 | unsigned long flags; |
1da177e4 | 2311 | |
d024ebc6 | 2312 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2313 | |
79456197 | 2314 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2315 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2316 | SBP2_DEBUG("Found pending command to complete"); | |
2317 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2318 | command = list_entry(lh, struct sbp2_command_info, list); | |
2319 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2320 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2321 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2322 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2323 | sizeof(command->scatter_gather_element), | |
2324 | PCI_DMA_BIDIRECTIONAL); | |
2325 | sbp2util_mark_command_completed(scsi_id, command); | |
2326 | if (command->Current_SCpnt) { | |
2327 | command->Current_SCpnt->result = status << 16; | |
2328 | command->Current_done(command->Current_SCpnt); | |
2329 | } | |
2330 | } | |
79456197 | 2331 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2332 | |
2333 | return; | |
2334 | } | |
2335 | ||
2336 | /* | |
2337 | * This function is called in order to complete a regular SBP-2 command. | |
2338 | * | |
2339 | * This can be called in interrupt context. | |
2340 | */ | |
2341 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2342 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2343 | void (*done)(struct scsi_cmnd *)) | |
2344 | { | |
d024ebc6 | 2345 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2346 | |
2347 | /* | |
2348 | * Sanity | |
2349 | */ | |
2350 | if (!SCpnt) { | |
2351 | SBP2_ERR("SCpnt is NULL"); | |
2352 | return; | |
2353 | } | |
2354 | ||
2355 | /* | |
2356 | * If a bus reset is in progress and there was an error, don't | |
2357 | * complete the command, just let it get retried at the end of the | |
2358 | * bus reset. | |
2359 | */ | |
a237f35f SR |
2360 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2361 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2362 | SBP2_ERR("Bus reset in progress - retry command later"); |
2363 | return; | |
2364 | } | |
a237f35f | 2365 | |
1da177e4 LT |
2366 | /* |
2367 | * Switch on scsi status | |
2368 | */ | |
2369 | switch (scsi_status) { | |
a237f35f | 2370 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 2371 | SCpnt->result = DID_OK << 16; |
a237f35f | 2372 | break; |
1da177e4 | 2373 | |
a237f35f SR |
2374 | case SBP2_SCSI_STATUS_BUSY: |
2375 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2376 | SCpnt->result = DID_BUS_BUSY << 16; | |
2377 | break; | |
1da177e4 | 2378 | |
a237f35f SR |
2379 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2380 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
8f0525ff | 2381 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
1da177e4 | 2382 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f | 2383 | scsi_print_command(SCpnt); |
d024ebc6 | 2384 | scsi_print_sense(SBP2_DEVICE_NAME, SCpnt); |
1da177e4 | 2385 | #endif |
a237f35f | 2386 | break; |
1da177e4 | 2387 | |
a237f35f SR |
2388 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2389 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2390 | SCpnt->result = DID_NO_CONNECT << 16; | |
2391 | scsi_print_command(SCpnt); | |
2392 | break; | |
1da177e4 | 2393 | |
a237f35f SR |
2394 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2395 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2396 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2397 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2398 | SCpnt->result = DID_ERROR << 16; | |
2399 | scsi_print_command(SCpnt); | |
2400 | break; | |
1da177e4 | 2401 | |
a237f35f SR |
2402 | default: |
2403 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2404 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2405 | } |
2406 | ||
1da177e4 LT |
2407 | /* |
2408 | * If a bus reset is in progress and there was an error, complete | |
2409 | * the command as busy so that it will get retried. | |
2410 | */ | |
a237f35f SR |
2411 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2412 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2413 | SBP2_ERR("Completing command with busy (bus reset)"); |
2414 | SCpnt->result = DID_BUS_BUSY << 16; | |
2415 | } | |
2416 | ||
2417 | /* | |
2418 | * If a unit attention occurs, return busy status so it gets | |
2419 | * retried... it could have happened because of a 1394 bus reset | |
2420 | * or hot-plug... | |
8f0525ff SR |
2421 | * XXX DID_BUS_BUSY is actually a bad idea because it will defy |
2422 | * the scsi layer's retry logic. | |
1da177e4 LT |
2423 | */ |
2424 | #if 0 | |
2425 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2426 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2427 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2428 | SCpnt->result = DID_BUS_BUSY << 16; | |
2429 | } | |
2430 | #endif | |
2431 | ||
2432 | /* | |
2433 | * Tell scsi stack that we're done with this command | |
2434 | */ | |
a237f35f | 2435 | done(SCpnt); |
1da177e4 LT |
2436 | } |
2437 | ||
abd559b1 | 2438 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2439 | { |
a80614d1 SR |
2440 | struct scsi_id_instance_data *scsi_id = |
2441 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2442 | ||
2443 | scsi_id->sdev = sdev; | |
2444 | ||
24d3bf88 | 2445 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2446 | sdev->inquiry_len = 36; |
abd559b1 JM |
2447 | return 0; |
2448 | } | |
2449 | ||
abd559b1 JM |
2450 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2451 | { | |
24d3bf88 SR |
2452 | struct scsi_id_instance_data *scsi_id = |
2453 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2454 | ||
abd559b1 | 2455 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f BC |
2456 | sdev->use_10_for_rw = 1; |
2457 | sdev->use_10_for_ms = 1; | |
24d3bf88 SR |
2458 | |
2459 | if (sdev->type == TYPE_DISK && | |
2460 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2461 | sdev->skip_ms_page_8 = 1; | |
e9a1c52c SR |
2462 | if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
2463 | sdev->fix_capacity = 1; | |
31a379e1 SR |
2464 | if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */ |
2465 | (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC)) | |
2466 | sdev->allow_restart = 1; | |
1da177e4 LT |
2467 | return 0; |
2468 | } | |
2469 | ||
abd559b1 JM |
2470 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2471 | { | |
2472 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2473 | return; | |
2474 | } | |
2475 | ||
1da177e4 LT |
2476 | /* |
2477 | * Called by scsi stack when something has really gone wrong. Usually | |
2478 | * called when a command has timed-out for some reason. | |
2479 | */ | |
2480 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2481 | { | |
2482 | struct scsi_id_instance_data *scsi_id = | |
2483 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2484 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2485 | struct sbp2_command_info *command; | |
24c7cd06 | 2486 | unsigned long flags; |
1da177e4 LT |
2487 | |
2488 | SBP2_ERR("aborting sbp2 command"); | |
2489 | scsi_print_command(SCpnt); | |
2490 | ||
abd559b1 | 2491 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2492 | |
2493 | /* | |
2494 | * Right now, just return any matching command structures | |
2495 | * to the free pool. | |
2496 | */ | |
24c7cd06 | 2497 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2498 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2499 | if (command) { | |
2500 | SBP2_DEBUG("Found command to abort"); | |
2501 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2502 | command->command_orb_dma, | |
2503 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2504 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2505 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2506 | command->sge_dma, | |
2507 | sizeof(command->scatter_gather_element), | |
2508 | PCI_DMA_BIDIRECTIONAL); | |
2509 | sbp2util_mark_command_completed(scsi_id, command); | |
2510 | if (command->Current_SCpnt) { | |
2511 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2512 | command->Current_done(command->Current_SCpnt); | |
2513 | } | |
2514 | } | |
24c7cd06 | 2515 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2516 | |
2517 | /* | |
2518 | * Initiate a fetch agent reset. | |
2519 | */ | |
2520 | sbp2_agent_reset(scsi_id, 0); | |
2521 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
2522 | } | |
2523 | ||
a237f35f | 2524 | return SUCCESS; |
1da177e4 LT |
2525 | } |
2526 | ||
2527 | /* | |
2528 | * Called by scsi stack when something has really gone wrong. | |
2529 | */ | |
abd559b1 | 2530 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2531 | { |
2532 | struct scsi_id_instance_data *scsi_id = | |
2533 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2534 | ||
2535 | SBP2_ERR("reset requested"); | |
2536 | ||
abd559b1 | 2537 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2538 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
2539 | sbp2_agent_reset(scsi_id, 0); | |
2540 | } | |
2541 | ||
abd559b1 | 2542 | return SUCCESS; |
94d0e7b8 JG |
2543 | } |
2544 | ||
a237f35f SR |
2545 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2546 | struct device_attribute *attr, | |
2547 | char *buf) | |
1da177e4 LT |
2548 | { |
2549 | struct scsi_device *sdev; | |
2550 | struct scsi_id_instance_data *scsi_id; | |
2551 | int lun; | |
2552 | ||
2553 | if (!(sdev = to_scsi_device(dev))) | |
2554 | return 0; | |
2555 | ||
2556 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2557 | return 0; | |
2558 | ||
e309fc6d | 2559 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2560 | |
2561 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2562 | scsi_id->ud->id, lun); | |
2563 | } | |
2564 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2565 | ||
2566 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2567 | &dev_attr_ieee1394_id, | |
2568 | NULL | |
2569 | }; | |
2570 | ||
2571 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2572 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2573 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2574 | MODULE_LICENSE("GPL"); | |
2575 | ||
2576 | /* SCSI host template */ | |
2577 | static struct scsi_host_template scsi_driver_template = { | |
2578 | .module = THIS_MODULE, | |
2579 | .name = "SBP-2 IEEE-1394", | |
2580 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2581 | .queuecommand = sbp2scsi_queuecommand, |
2582 | .eh_abort_handler = sbp2scsi_abort, | |
2583 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2584 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2585 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2586 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2587 | .this_id = -1, |
2588 | .sg_tablesize = SG_ALL, | |
2589 | .use_clustering = ENABLE_CLUSTERING, | |
2590 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2591 | .can_queue = SBP2_MAX_CMDS, | |
2592 | .emulated = 1, | |
2593 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2594 | }; | |
2595 | ||
2596 | static int sbp2_module_init(void) | |
2597 | { | |
2598 | int ret; | |
2599 | ||
d024ebc6 | 2600 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2601 | |
1da177e4 LT |
2602 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2603 | if (serialize_io) { | |
2bab359a JM |
2604 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2605 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2606 | scsi_driver_template.can_queue = 1; |
2607 | scsi_driver_template.cmd_per_lun = 1; | |
2608 | } | |
2609 | ||
24d3bf88 SR |
2610 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
2611 | (max_sectors * 512) > (128 * 1024)) | |
2612 | max_sectors = 128 * 1024 / 512; | |
1da177e4 LT |
2613 | scsi_driver_template.max_sectors = max_sectors; |
2614 | ||
1da177e4 LT |
2615 | /* Register our high level driver with 1394 stack */ |
2616 | hpsb_register_highlevel(&sbp2_highlevel); | |
2617 | ||
2618 | ret = hpsb_register_protocol(&sbp2_driver); | |
2619 | if (ret) { | |
2620 | SBP2_ERR("Failed to register protocol"); | |
2621 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2622 | return ret; | |
2623 | } | |
2624 | ||
2625 | return 0; | |
2626 | } | |
2627 | ||
2628 | static void __exit sbp2_module_exit(void) | |
2629 | { | |
d024ebc6 | 2630 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2631 | |
2632 | hpsb_unregister_protocol(&sbp2_driver); | |
2633 | ||
2634 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2635 | } | |
2636 | ||
2637 | module_init(sbp2_module_init); | |
2638 | module_exit(sbp2_module_exit); |