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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 | |
611aa19f SR |
206 | #define SBP2_ORB_DEBUG(fmt, args...) do {} while (0) |
207 | #define outstanding_orb_incr do {} while (0) | |
208 | #define outstanding_orb_decr do {} while (0) | |
1da177e4 LT |
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 | |
611aa19f SR |
220 | #define SBP2_DMA_ALLOC(fmt, args...) do {} while (0) |
221 | #define SBP2_DMA_FREE(fmt, args...) do {} while (0) | |
1da177e4 LT |
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 | |
611aa19f | 235 | #define SBP2_DEBUG(fmt, args...) do {} while (0) |
1da177e4 LT |
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? */ | |
611aa19f SR |
378 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
379 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
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 | |
611aa19f | 415 | #define sbp2util_packet_dump(w,x,y,z) do {} while (0) |
1da177e4 LT |
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 | ||
09ee67ab SR |
468 | static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, |
469 | u64 offset, quadlet_t *data, size_t len) | |
470 | { | |
471 | /* | |
472 | * There is a small window after a bus reset within which the node | |
473 | * entry's generation is current but the reconnect wasn't completed. | |
474 | */ | |
475 | if (atomic_read(&scsi_id->unfinished_reset)) | |
476 | return; | |
477 | ||
478 | if (hpsb_node_write(scsi_id->ne, | |
479 | scsi_id->sbp2_command_block_agent_addr + offset, | |
480 | data, len)) | |
481 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
482 | /* | |
483 | * Now accept new SCSI commands, unless a bus reset happended during | |
484 | * hpsb_node_write. | |
485 | */ | |
486 | if (!atomic_read(&scsi_id->unfinished_reset)) | |
487 | scsi_unblock_requests(scsi_id->scsi_host); | |
488 | } | |
489 | ||
490 | static void sbp2util_write_orb_pointer(void *p) | |
491 | { | |
492 | quadlet_t data[2]; | |
493 | ||
494 | data[0] = ORB_SET_NODE_ID( | |
495 | ((struct scsi_id_instance_data *)p)->hi->host->node_id); | |
496 | data[1] = ((struct scsi_id_instance_data *)p)->last_orb_dma; | |
497 | sbp2util_cpu_to_be32_buffer(data, 8); | |
498 | sbp2util_notify_fetch_agent(p, SBP2_ORB_POINTER_OFFSET, data, 8); | |
499 | } | |
500 | ||
501 | static void sbp2util_write_doorbell(void *p) | |
502 | { | |
503 | sbp2util_notify_fetch_agent(p, SBP2_DOORBELL_OFFSET, NULL, 4); | |
504 | } | |
505 | ||
1da177e4 LT |
506 | /* |
507 | * This function is called to create a pool of command orbs used for | |
508 | * command processing. It is called when a new sbp2 device is detected. | |
509 | */ | |
510 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
511 | { | |
512 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
513 | int i; | |
514 | unsigned long flags, orbs; | |
515 | struct sbp2_command_info *command; | |
516 | ||
517 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
518 | ||
519 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
520 | for (i = 0; i < orbs; i++) { | |
8551158a | 521 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 522 | if (!command) { |
a237f35f SR |
523 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
524 | flags); | |
525 | return -ENOMEM; | |
1da177e4 | 526 | } |
1da177e4 | 527 | command->command_orb_dma = |
a237f35f SR |
528 | pci_map_single(hi->host->pdev, &command->command_orb, |
529 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 530 | PCI_DMA_TODEVICE); |
1da177e4 LT |
531 | SBP2_DMA_ALLOC("single command orb DMA"); |
532 | command->sge_dma = | |
a237f35f SR |
533 | pci_map_single(hi->host->pdev, |
534 | &command->scatter_gather_element, | |
535 | sizeof(command->scatter_gather_element), | |
536 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
537 | SBP2_DMA_ALLOC("scatter_gather_element"); |
538 | INIT_LIST_HEAD(&command->list); | |
539 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
540 | } | |
541 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
542 | return 0; | |
543 | } | |
544 | ||
545 | /* | |
546 | * This function is called to delete a pool of command orbs. | |
547 | */ | |
548 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
549 | { | |
550 | struct hpsb_host *host = scsi_id->hi->host; | |
551 | struct list_head *lh, *next; | |
552 | struct sbp2_command_info *command; | |
553 | unsigned long flags; | |
554 | ||
555 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
556 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
557 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
558 | command = list_entry(lh, struct sbp2_command_info, list); | |
559 | ||
560 | /* Release our generic DMA's */ | |
561 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
562 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 563 | PCI_DMA_TODEVICE); |
1da177e4 LT |
564 | SBP2_DMA_FREE("single command orb DMA"); |
565 | pci_unmap_single(host->pdev, command->sge_dma, | |
566 | sizeof(command->scatter_gather_element), | |
567 | PCI_DMA_BIDIRECTIONAL); | |
568 | SBP2_DMA_FREE("scatter_gather_element"); | |
569 | ||
570 | kfree(command); | |
571 | } | |
572 | } | |
573 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
574 | return; | |
575 | } | |
576 | ||
577 | /* | |
578 | * This function finds the sbp2_command for a given outstanding command | |
579 | * orb.Only looks at the inuse list. | |
580 | */ | |
581 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
582 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
583 | { | |
584 | struct sbp2_command_info *command; | |
585 | unsigned long flags; | |
586 | ||
587 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
588 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
589 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
590 | if (command->command_orb_dma == orb) { | |
591 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 592 | return command; |
1da177e4 LT |
593 | } |
594 | } | |
595 | } | |
596 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
597 | ||
598 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
599 | ||
a237f35f | 600 | return NULL; |
1da177e4 LT |
601 | } |
602 | ||
603 | /* | |
604 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
605 | * Only looks at the inuse list. | |
24c7cd06 | 606 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 607 | */ |
24c7cd06 SR |
608 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
609 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
610 | { |
611 | struct sbp2_command_info *command; | |
1da177e4 | 612 | |
24c7cd06 SR |
613 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) |
614 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) | |
615 | if (command->Current_SCpnt == SCpnt) | |
a237f35f | 616 | return command; |
a237f35f | 617 | return NULL; |
1da177e4 LT |
618 | } |
619 | ||
620 | /* | |
621 | * This function allocates a command orb used to send a scsi command. | |
622 | */ | |
623 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
624 | struct scsi_id_instance_data *scsi_id, | |
625 | struct scsi_cmnd *Current_SCpnt, | |
626 | void (*Current_done)(struct scsi_cmnd *)) | |
627 | { | |
628 | struct list_head *lh; | |
629 | struct sbp2_command_info *command = NULL; | |
630 | unsigned long flags; | |
631 | ||
632 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
633 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
634 | lh = scsi_id->sbp2_command_orb_completed.next; | |
635 | list_del(lh); | |
636 | command = list_entry(lh, struct sbp2_command_info, list); | |
637 | command->Current_done = Current_done; | |
638 | command->Current_SCpnt = Current_SCpnt; | |
639 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
640 | } else { | |
d024ebc6 | 641 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 LT |
642 | } |
643 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 644 | return command; |
1da177e4 LT |
645 | } |
646 | ||
647 | /* Free our DMA's */ | |
648 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
649 | { | |
650 | struct scsi_id_instance_data *scsi_id = | |
651 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
652 | struct hpsb_host *host; | |
653 | ||
654 | if (!scsi_id) { | |
d024ebc6 | 655 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
656 | return; |
657 | } | |
658 | ||
659 | host = scsi_id->ud->ne->host; | |
660 | ||
661 | if (command->cmd_dma) { | |
662 | if (command->dma_type == CMD_DMA_SINGLE) { | |
663 | pci_unmap_single(host->pdev, command->cmd_dma, | |
664 | command->dma_size, command->dma_dir); | |
665 | SBP2_DMA_FREE("single bulk"); | |
666 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
667 | pci_unmap_page(host->pdev, command->cmd_dma, | |
668 | command->dma_size, command->dma_dir); | |
669 | SBP2_DMA_FREE("single page"); | |
670 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
671 | command->dma_type = CMD_DMA_NONE; | |
672 | command->cmd_dma = 0; | |
673 | } | |
674 | ||
675 | if (command->sge_buffer) { | |
676 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
677 | command->dma_size, command->dma_dir); | |
678 | SBP2_DMA_FREE("scatter list"); | |
679 | command->sge_buffer = NULL; | |
680 | } | |
681 | } | |
682 | ||
683 | /* | |
684 | * This function moves a command to the completed orb list. | |
24c7cd06 | 685 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 686 | */ |
24c7cd06 SR |
687 | static void sbp2util_mark_command_completed( |
688 | struct scsi_id_instance_data *scsi_id, | |
689 | struct sbp2_command_info *command) | |
1da177e4 | 690 | { |
1da177e4 LT |
691 | list_del(&command->list); |
692 | sbp2util_free_command_dma(command); | |
693 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
1da177e4 LT |
694 | } |
695 | ||
abd559b1 JM |
696 | /* |
697 | * Is scsi_id valid? Is the 1394 node still present? | |
698 | */ | |
699 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
700 | { | |
701 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
702 | } | |
703 | ||
1da177e4 LT |
704 | /********************************************* |
705 | * IEEE-1394 core driver stack related section | |
706 | *********************************************/ | |
707 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
708 | ||
709 | static int sbp2_probe(struct device *dev) | |
710 | { | |
711 | struct unit_directory *ud; | |
712 | struct scsi_id_instance_data *scsi_id; | |
713 | ||
d024ebc6 | 714 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
715 | |
716 | ud = container_of(dev, struct unit_directory, device); | |
717 | ||
718 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
719 | * instead. */ | |
720 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
721 | return -ENODEV; | |
722 | ||
a237f35f | 723 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 724 | |
a237f35f SR |
725 | if (!scsi_id) |
726 | return -ENOMEM; | |
1da177e4 | 727 | |
a237f35f | 728 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 729 | |
a237f35f | 730 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
731 | } |
732 | ||
733 | static int sbp2_remove(struct device *dev) | |
734 | { | |
735 | struct unit_directory *ud; | |
736 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 737 | struct scsi_device *sdev; |
1da177e4 | 738 | |
d024ebc6 | 739 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
740 | |
741 | ud = container_of(dev, struct unit_directory, device); | |
742 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
743 | if (!scsi_id) |
744 | return 0; | |
745 | ||
bf637ec3 SR |
746 | if (scsi_id->scsi_host) { |
747 | /* Get rid of enqueued commands if there is no chance to | |
748 | * send them. */ | |
749 | if (!sbp2util_node_is_available(scsi_id)) | |
750 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
751 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
752 | * highlevel drivers which would deadlock if blocked. */ | |
09ee67ab | 753 | atomic_set(&scsi_id->unfinished_reset, 0); |
abd559b1 | 754 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 755 | } |
abd559b1 JM |
756 | sdev = scsi_id->sdev; |
757 | if (sdev) { | |
758 | scsi_id->sdev = NULL; | |
759 | scsi_remove_device(sdev); | |
760 | } | |
1da177e4 LT |
761 | |
762 | sbp2_logout_device(scsi_id); | |
763 | sbp2_remove_device(scsi_id); | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | static int sbp2_update(struct unit_directory *ud) | |
769 | { | |
770 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
771 | ||
d024ebc6 | 772 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
773 | |
774 | if (sbp2_reconnect_device(scsi_id)) { | |
775 | ||
776 | /* | |
777 | * Ok, reconnect has failed. Perhaps we didn't | |
778 | * reconnect fast enough. Try doing a regular login, but | |
779 | * first do a logout just in case of any weirdness. | |
780 | */ | |
781 | sbp2_logout_device(scsi_id); | |
782 | ||
783 | if (sbp2_login_device(scsi_id)) { | |
784 | /* Login failed too, just fail, and the backend | |
785 | * will call our sbp2_remove for us */ | |
786 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
787 | return -EBUSY; | |
788 | } | |
789 | } | |
790 | ||
791 | /* Set max retries to something large on the device. */ | |
792 | sbp2_set_busy_timeout(scsi_id); | |
793 | ||
794 | /* Do a SBP-2 fetch agent reset. */ | |
795 | sbp2_agent_reset(scsi_id, 1); | |
796 | ||
797 | /* Get the max speed and packet size that we can use. */ | |
798 | sbp2_max_speed_and_size(scsi_id); | |
799 | ||
800 | /* Complete any pending commands with busy (so they get | |
801 | * retried) and remove them from our queue | |
802 | */ | |
803 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
804 | ||
805 | /* Make sure we unblock requests (since this is likely after a bus | |
806 | * reset). */ | |
09ee67ab | 807 | atomic_set(&scsi_id->unfinished_reset, 0); |
1da177e4 LT |
808 | scsi_unblock_requests(scsi_id->scsi_host); |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | /* This functions is called by the sbp2_probe, for each new device. We now | |
814 | * allocate one scsi host for each scsi_id (unit directory). */ | |
815 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
816 | { | |
817 | struct sbp2scsi_host_info *hi; | |
818 | struct Scsi_Host *scsi_host = NULL; | |
819 | struct scsi_id_instance_data *scsi_id = NULL; | |
820 | ||
d024ebc6 | 821 | SBP2_DEBUG_ENTER(); |
1da177e4 | 822 | |
8551158a | 823 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
824 | if (!scsi_id) { |
825 | SBP2_ERR("failed to create scsi_id"); | |
826 | goto failed_alloc; | |
827 | } | |
1da177e4 LT |
828 | |
829 | scsi_id->ne = ud->ne; | |
830 | scsi_id->ud = ud; | |
831 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
832 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
6737231e | 833 | scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
834 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
835 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
836 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
837 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
09ee67ab SR |
838 | atomic_set(&scsi_id->unfinished_reset, 0); |
839 | INIT_WORK(&scsi_id->protocol_work, NULL, NULL); | |
1da177e4 LT |
840 | |
841 | ud->device.driver_data = scsi_id; | |
842 | ||
843 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
844 | if (!hi) { | |
845 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
846 | if (!hi) { | |
847 | SBP2_ERR("failed to allocate hostinfo"); | |
848 | goto failed_alloc; | |
849 | } | |
850 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
851 | hi->host = ud->ne->host; | |
852 | INIT_LIST_HEAD(&hi->scsi_ids); | |
853 | ||
1da177e4 LT |
854 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
855 | /* Handle data movement if physical dma is not | |
55664051 SR |
856 | * enabled or not supported on host controller */ |
857 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
858 | &sbp2_physdma_ops, | |
859 | 0x0ULL, 0xfffffffcULL)) { | |
860 | SBP2_ERR("failed to register lower 4GB address range"); | |
861 | goto failed_alloc; | |
862 | } | |
1da177e4 LT |
863 | #endif |
864 | } | |
865 | ||
147830f2 SR |
866 | /* Prevent unloading of the 1394 host */ |
867 | if (!try_module_get(hi->host->driver->owner)) { | |
868 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
869 | goto failed_alloc; | |
870 | } | |
871 | ||
1da177e4 LT |
872 | scsi_id->hi = hi; |
873 | ||
874 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
875 | ||
35bdddb8 SR |
876 | /* Register the status FIFO address range. We could use the same FIFO |
877 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
878 | * target in order to support multi-unit devices. |
879 | * The FIFO is located out of the local host controller's physical range | |
880 | * but, if possible, within the posted write area. Status writes will | |
881 | * then be performed as unified transactions. This slightly reduces | |
882 | * bandwidth usage, and some Prolific based devices seem to require it. | |
883 | */ | |
35bdddb8 SR |
884 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
885 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
886 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 887 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
6737231e | 888 | if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
889 | SBP2_ERR("failed to allocate status FIFO address range"); |
890 | goto failed_alloc; | |
891 | } | |
892 | ||
1da177e4 | 893 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 894 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 895 | sizeof(unsigned long)); |
1da177e4 LT |
896 | if (!scsi_host) { |
897 | SBP2_ERR("failed to register scsi host"); | |
898 | goto failed_alloc; | |
899 | } | |
900 | ||
901 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
902 | ||
903 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
904 | scsi_id->scsi_host = scsi_host; | |
905 | return scsi_id; | |
906 | } | |
907 | ||
908 | SBP2_ERR("failed to add scsi host"); | |
909 | scsi_host_put(scsi_host); | |
910 | ||
911 | failed_alloc: | |
912 | sbp2_remove_device(scsi_id); | |
913 | return NULL; | |
914 | } | |
915 | ||
1da177e4 LT |
916 | static void sbp2_host_reset(struct hpsb_host *host) |
917 | { | |
918 | struct sbp2scsi_host_info *hi; | |
919 | struct scsi_id_instance_data *scsi_id; | |
920 | ||
921 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
922 | ||
923 | if (hi) { | |
09ee67ab SR |
924 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) { |
925 | atomic_set(&scsi_id->unfinished_reset, 1); | |
1da177e4 | 926 | scsi_block_requests(scsi_id->scsi_host); |
09ee67ab | 927 | } |
1da177e4 LT |
928 | } |
929 | } | |
930 | ||
1da177e4 LT |
931 | /* |
932 | * This function is where we first pull the node unique ids, and then | |
933 | * allocate memory and register a SBP-2 device. | |
934 | */ | |
935 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
936 | { | |
937 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 938 | int error; |
1da177e4 | 939 | |
d024ebc6 | 940 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
941 | |
942 | /* Login FIFO DMA */ | |
943 | scsi_id->login_response = | |
a237f35f SR |
944 | pci_alloc_consistent(hi->host->pdev, |
945 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
946 | &scsi_id->login_response_dma); |
947 | if (!scsi_id->login_response) | |
948 | goto alloc_fail; | |
949 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
950 | ||
951 | /* Query logins ORB DMA */ | |
952 | scsi_id->query_logins_orb = | |
a237f35f SR |
953 | pci_alloc_consistent(hi->host->pdev, |
954 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
955 | &scsi_id->query_logins_orb_dma); |
956 | if (!scsi_id->query_logins_orb) | |
957 | goto alloc_fail; | |
958 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
959 | ||
960 | /* Query logins response DMA */ | |
961 | scsi_id->query_logins_response = | |
a237f35f SR |
962 | pci_alloc_consistent(hi->host->pdev, |
963 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
964 | &scsi_id->query_logins_response_dma); |
965 | if (!scsi_id->query_logins_response) | |
966 | goto alloc_fail; | |
967 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
968 | ||
969 | /* Reconnect ORB DMA */ | |
970 | scsi_id->reconnect_orb = | |
a237f35f SR |
971 | pci_alloc_consistent(hi->host->pdev, |
972 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
973 | &scsi_id->reconnect_orb_dma); |
974 | if (!scsi_id->reconnect_orb) | |
975 | goto alloc_fail; | |
976 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
977 | ||
978 | /* Logout ORB DMA */ | |
979 | scsi_id->logout_orb = | |
a237f35f SR |
980 | pci_alloc_consistent(hi->host->pdev, |
981 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
982 | &scsi_id->logout_orb_dma); |
983 | if (!scsi_id->logout_orb) | |
984 | goto alloc_fail; | |
985 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
986 | ||
987 | /* Login ORB DMA */ | |
988 | scsi_id->login_orb = | |
a237f35f SR |
989 | pci_alloc_consistent(hi->host->pdev, |
990 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 991 | &scsi_id->login_orb_dma); |
eaceec7f SR |
992 | if (!scsi_id->login_orb) |
993 | goto alloc_fail; | |
1da177e4 LT |
994 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
995 | ||
996 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
997 | ||
998 | /* | |
999 | * Create our command orb pool | |
1000 | */ | |
1001 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
1002 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
1003 | sbp2_remove_device(scsi_id); | |
1004 | return -ENOMEM; | |
1005 | } | |
1006 | ||
1007 | /* Schedule a timeout here. The reason is that we may be so close | |
1008 | * to a bus reset, that the device is not available for logins. | |
1009 | * This can happen when the bus reset is caused by the host | |
1010 | * connected to the sbp2 device being removed. That host would | |
1011 | * have a certain amount of time to relogin before the sbp2 device | |
1012 | * allows someone else to login instead. One second makes sense. */ | |
1013 | msleep_interruptible(1000); | |
1014 | if (signal_pending(current)) { | |
1da177e4 LT |
1015 | sbp2_remove_device(scsi_id); |
1016 | return -EINTR; | |
1017 | } | |
a237f35f | 1018 | |
1da177e4 LT |
1019 | /* |
1020 | * Login to the sbp-2 device | |
1021 | */ | |
1022 | if (sbp2_login_device(scsi_id)) { | |
1023 | /* Login failed, just remove the device. */ | |
1024 | sbp2_remove_device(scsi_id); | |
1025 | return -EBUSY; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Set max retries to something large on the device | |
1030 | */ | |
1031 | sbp2_set_busy_timeout(scsi_id); | |
1032 | ||
1033 | /* | |
1034 | * Do a SBP-2 fetch agent reset | |
1035 | */ | |
1036 | sbp2_agent_reset(scsi_id, 1); | |
1037 | ||
1038 | /* | |
1039 | * Get the max speed and packet size that we can use | |
1040 | */ | |
1041 | sbp2_max_speed_and_size(scsi_id); | |
1042 | ||
1043 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
1044 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
1045 | if (error) { | |
1da177e4 | 1046 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
1047 | sbp2_logout_device(scsi_id); |
1048 | sbp2_remove_device(scsi_id); | |
146f7262 | 1049 | return error; |
1da177e4 LT |
1050 | } |
1051 | ||
1052 | return 0; | |
eaceec7f SR |
1053 | |
1054 | alloc_fail: | |
1055 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
1056 | sbp2_remove_device(scsi_id); | |
1057 | return -ENOMEM; | |
1da177e4 LT |
1058 | } |
1059 | ||
1060 | /* | |
1061 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
1062 | */ | |
1063 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
1064 | { | |
1065 | struct sbp2scsi_host_info *hi; | |
1066 | ||
d024ebc6 | 1067 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1068 | |
1069 | if (!scsi_id) | |
1070 | return; | |
1071 | ||
1072 | hi = scsi_id->hi; | |
1073 | ||
1074 | /* This will remove our scsi device aswell */ | |
1075 | if (scsi_id->scsi_host) { | |
1076 | scsi_remove_host(scsi_id->scsi_host); | |
1077 | scsi_host_put(scsi_id->scsi_host); | |
1078 | } | |
09ee67ab | 1079 | flush_scheduled_work(); |
1da177e4 LT |
1080 | sbp2util_remove_command_orb_pool(scsi_id); |
1081 | ||
1082 | list_del(&scsi_id->scsi_list); | |
1083 | ||
1084 | if (scsi_id->login_response) { | |
1085 | pci_free_consistent(hi->host->pdev, | |
1086 | sizeof(struct sbp2_login_response), | |
1087 | scsi_id->login_response, | |
1088 | scsi_id->login_response_dma); | |
1089 | SBP2_DMA_FREE("single login FIFO"); | |
1090 | } | |
1091 | ||
1092 | if (scsi_id->login_orb) { | |
1093 | pci_free_consistent(hi->host->pdev, | |
1094 | sizeof(struct sbp2_login_orb), | |
1095 | scsi_id->login_orb, | |
1096 | scsi_id->login_orb_dma); | |
1097 | SBP2_DMA_FREE("single login ORB"); | |
1098 | } | |
1099 | ||
1100 | if (scsi_id->reconnect_orb) { | |
1101 | pci_free_consistent(hi->host->pdev, | |
1102 | sizeof(struct sbp2_reconnect_orb), | |
1103 | scsi_id->reconnect_orb, | |
1104 | scsi_id->reconnect_orb_dma); | |
1105 | SBP2_DMA_FREE("single reconnect orb"); | |
1106 | } | |
1107 | ||
1108 | if (scsi_id->logout_orb) { | |
1109 | pci_free_consistent(hi->host->pdev, | |
1110 | sizeof(struct sbp2_logout_orb), | |
1111 | scsi_id->logout_orb, | |
1112 | scsi_id->logout_orb_dma); | |
1113 | SBP2_DMA_FREE("single logout orb"); | |
1114 | } | |
1115 | ||
1116 | if (scsi_id->query_logins_orb) { | |
1117 | pci_free_consistent(hi->host->pdev, | |
1118 | sizeof(struct sbp2_query_logins_orb), | |
1119 | scsi_id->query_logins_orb, | |
1120 | scsi_id->query_logins_orb_dma); | |
1121 | SBP2_DMA_FREE("single query logins orb"); | |
1122 | } | |
1123 | ||
1124 | if (scsi_id->query_logins_response) { | |
1125 | pci_free_consistent(hi->host->pdev, | |
1126 | sizeof(struct sbp2_query_logins_response), | |
1127 | scsi_id->query_logins_response, | |
1128 | scsi_id->query_logins_response_dma); | |
1129 | SBP2_DMA_FREE("single query logins data"); | |
1130 | } | |
1131 | ||
6737231e | 1132 | if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 1133 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
6737231e | 1134 | scsi_id->status_fifo_addr); |
35bdddb8 | 1135 | |
1da177e4 LT |
1136 | scsi_id->ud->device.driver_data = NULL; |
1137 | ||
147830f2 SR |
1138 | if (hi) |
1139 | module_put(hi->host->driver->owner); | |
1140 | ||
1da177e4 LT |
1141 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
1142 | ||
1143 | kfree(scsi_id); | |
1144 | } | |
1145 | ||
1146 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1147 | /* | |
1148 | * This function deals with physical dma write requests (for adapters that do not support | |
1149 | * physical dma in hardware). Mostly just here for debugging... | |
1150 | */ | |
a237f35f SR |
1151 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1152 | int destid, quadlet_t *data, u64 addr, | |
1153 | size_t length, u16 flags) | |
1da177e4 LT |
1154 | { |
1155 | ||
a237f35f SR |
1156 | /* |
1157 | * Manually put the data in the right place. | |
1158 | */ | |
1159 | memcpy(bus_to_virt((u32) addr), data, length); | |
1160 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1161 | (u32) addr); | |
1162 | return RCODE_COMPLETE; | |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | /* | |
1166 | * This function deals with physical dma read requests (for adapters that do not support | |
1167 | * physical dma in hardware). Mostly just here for debugging... | |
1168 | */ | |
a237f35f SR |
1169 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1170 | quadlet_t *data, u64 addr, size_t length, | |
1171 | u16 flags) | |
1da177e4 LT |
1172 | { |
1173 | ||
a237f35f SR |
1174 | /* |
1175 | * Grab data from memory and send a read response. | |
1176 | */ | |
1177 | memcpy(data, bus_to_virt((u32) addr), length); | |
1178 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1179 | (u32) addr); | |
1180 | return RCODE_COMPLETE; | |
1da177e4 LT |
1181 | } |
1182 | #endif | |
1183 | ||
1da177e4 LT |
1184 | /************************************** |
1185 | * SBP-2 protocol related section | |
1186 | **************************************/ | |
1187 | ||
1da177e4 LT |
1188 | /* |
1189 | * This function queries the device for the maximum concurrent logins it | |
1190 | * supports. | |
1191 | */ | |
1192 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1193 | { | |
1194 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1195 | quadlet_t data[2]; | |
1196 | int max_logins; | |
1197 | int active_logins; | |
1198 | ||
d024ebc6 | 1199 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1200 | |
1201 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1202 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1203 | ||
1204 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1205 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1206 | |
1207 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1208 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1209 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1210 | |
1211 | scsi_id->query_logins_orb->reserved_resp_length = | |
1212 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1213 | |
35bdddb8 SR |
1214 | scsi_id->query_logins_orb->status_fifo_hi = |
1215 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1216 | scsi_id->query_logins_orb->status_fifo_lo = | |
1217 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1218 | |
1219 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1220 | ||
1da177e4 LT |
1221 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
1222 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1223 | ||
1224 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1225 | |
1da177e4 LT |
1226 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1227 | data[1] = scsi_id->query_logins_orb_dma; | |
1228 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1229 | ||
1da177e4 | 1230 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 | 1231 | |
e8398bb7 | 1232 | if (sbp2util_access_timeout(scsi_id, 2*HZ)) { |
1da177e4 | 1233 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1234 | return -EIO; |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1238 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1239 | return -EIO; |
1da177e4 LT |
1240 | } |
1241 | ||
6065772d SR |
1242 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1243 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); | |
a237f35f | 1244 | return -EIO; |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1248 | ||
1249 | SBP2_DEBUG("length_max_logins = %x", | |
1250 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1251 | ||
1da177e4 | 1252 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
20f45781 | 1253 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 LT |
1254 | |
1255 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
20f45781 | 1256 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1257 | |
1258 | if (active_logins >= max_logins) { | |
a237f35f | 1259 | return -EIO; |
1da177e4 LT |
1260 | } |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * This function is called in order to login to a particular SBP-2 device, | |
1267 | * after a bus reset. | |
1268 | */ | |
1269 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1270 | { | |
1271 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1272 | quadlet_t data[2]; | |
1273 | ||
d024ebc6 | 1274 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1275 | |
1276 | if (!scsi_id->login_orb) { | |
d024ebc6 | 1277 | SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__); |
a237f35f | 1278 | return -EIO; |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | if (!exclusive_login) { | |
1282 | if (sbp2_query_logins(scsi_id)) { | |
1283 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1284 | return -EIO; |
1da177e4 LT |
1285 | } |
1286 | } | |
1287 | ||
1288 | /* Set-up login ORB, assume no password */ | |
1289 | scsi_id->login_orb->password_hi = 0; | |
1290 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1291 | |
1292 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1293 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1294 | |
1295 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1296 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1297 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1298 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1299 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1300 | |
1301 | scsi_id->login_orb->passwd_resp_lengths = | |
1302 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1303 | |
35bdddb8 SR |
1304 | scsi_id->login_orb->status_fifo_hi = |
1305 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1306 | scsi_id->login_orb->status_fifo_lo = | |
1307 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1308 | |
1da177e4 LT |
1309 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1310 | ||
1da177e4 LT |
1311 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
1312 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1313 | ||
1da177e4 | 1314 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1315 | |
1da177e4 LT |
1316 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1317 | data[1] = scsi_id->login_orb_dma; | |
1318 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1319 | ||
1da177e4 | 1320 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1321 | |
1322 | /* | |
1323 | * Wait for login status (up to 20 seconds)... | |
1324 | */ | |
e8398bb7 SR |
1325 | if (sbp2util_access_timeout(scsi_id, 20*HZ)) { |
1326 | SBP2_ERR("Error logging into SBP-2 device - timed out"); | |
a237f35f | 1327 | return -EIO; |
1da177e4 LT |
1328 | } |
1329 | ||
1330 | /* | |
1331 | * Sanity. Make sure status returned matches login orb. | |
1332 | */ | |
1333 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
6065772d | 1334 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1335 | return -EIO; |
1da177e4 LT |
1336 | } |
1337 | ||
6065772d SR |
1338 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1339 | SBP2_ERR("Error logging into SBP-2 device - failed"); | |
a237f35f | 1340 | return -EIO; |
1da177e4 LT |
1341 | } |
1342 | ||
1343 | /* | |
1344 | * Byte swap the login response, for use when reconnecting or | |
1345 | * logging out. | |
1346 | */ | |
1347 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1348 | ||
1349 | /* | |
1350 | * Grab our command block agent address from the login response. | |
1351 | */ | |
1352 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1353 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1354 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1355 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1356 | ||
1357 | scsi_id->sbp2_command_block_agent_addr = | |
1358 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1359 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1360 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1361 | ||
1362 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1363 | return 0; |
1da177e4 LT |
1364 | } |
1365 | ||
1366 | /* | |
1367 | * This function is called in order to logout from a particular SBP-2 | |
1368 | * device, usually called during driver unload. | |
1369 | */ | |
1370 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1371 | { | |
1372 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1373 | quadlet_t data[2]; | |
1374 | int error; | |
1375 | ||
d024ebc6 | 1376 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1377 | |
1378 | /* | |
1379 | * Set-up logout ORB | |
1380 | */ | |
1381 | scsi_id->logout_orb->reserved1 = 0x0; | |
1382 | scsi_id->logout_orb->reserved2 = 0x0; | |
1383 | scsi_id->logout_orb->reserved3 = 0x0; | |
1384 | scsi_id->logout_orb->reserved4 = 0x0; | |
1385 | ||
1386 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1387 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1388 | ||
1389 | /* Notify us when complete */ | |
1390 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1391 | ||
1392 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1393 | scsi_id->logout_orb->status_fifo_hi = |
1394 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1395 | scsi_id->logout_orb->status_fifo_lo = | |
1396 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1397 | |
1398 | /* | |
1399 | * Byte swap ORB if necessary | |
1400 | */ | |
1401 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1402 | ||
1403 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1404 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1405 | ||
1406 | /* | |
1407 | * Ok, let's write to the target's management agent register | |
1408 | */ | |
1409 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1410 | data[1] = scsi_id->logout_orb_dma; | |
1411 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1412 | ||
1da177e4 | 1413 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1414 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1415 | if (error) |
1416 | return error; | |
1417 | ||
1418 | /* Wait for device to logout...1 second. */ | |
e8398bb7 | 1419 | if (sbp2util_access_timeout(scsi_id, HZ)) |
1da177e4 LT |
1420 | return -EIO; |
1421 | ||
1422 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1423 | return 0; |
1da177e4 LT |
1424 | } |
1425 | ||
1426 | /* | |
1427 | * This function is called in order to reconnect to a particular SBP-2 | |
1428 | * device, after a bus reset. | |
1429 | */ | |
1430 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1431 | { | |
1432 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1433 | quadlet_t data[2]; | |
1434 | int error; | |
1435 | ||
d024ebc6 | 1436 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1437 | |
1438 | /* | |
1439 | * Set-up reconnect ORB | |
1440 | */ | |
1441 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1442 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1443 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1444 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1445 | ||
1446 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1447 | scsi_id->reconnect_orb->login_ID_misc |= | |
1448 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1449 | ||
1450 | /* Notify us when complete */ | |
1451 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1452 | ||
1453 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1454 | scsi_id->reconnect_orb->status_fifo_hi = |
1455 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1456 | scsi_id->reconnect_orb->status_fifo_lo = | |
1457 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1458 | |
1459 | /* | |
1460 | * Byte swap ORB if necessary | |
1461 | */ | |
1462 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1463 | ||
1464 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1465 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1466 | ||
1da177e4 LT |
1467 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1468 | data[1] = scsi_id->reconnect_orb_dma; | |
1469 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1470 | ||
1da177e4 | 1471 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1472 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1473 | if (error) |
1474 | return error; | |
1475 | ||
1476 | /* | |
1477 | * Wait for reconnect status (up to 1 second)... | |
1478 | */ | |
e8398bb7 SR |
1479 | if (sbp2util_access_timeout(scsi_id, HZ)) { |
1480 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); | |
a237f35f | 1481 | return -EIO; |
1da177e4 LT |
1482 | } |
1483 | ||
1484 | /* | |
1485 | * Sanity. Make sure status returned matches reconnect orb. | |
1486 | */ | |
1487 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
6065772d | 1488 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1489 | return -EIO; |
1da177e4 LT |
1490 | } |
1491 | ||
6065772d SR |
1492 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1493 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); | |
a237f35f | 1494 | return -EIO; |
1da177e4 LT |
1495 | } |
1496 | ||
1497 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
a237f35f | 1498 | return 0; |
1da177e4 LT |
1499 | } |
1500 | ||
1501 | /* | |
1502 | * This function is called in order to set the busy timeout (number of | |
1503 | * retries to attempt) on the sbp2 device. | |
1504 | */ | |
1505 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1506 | { | |
1507 | quadlet_t data; | |
1508 | ||
d024ebc6 | 1509 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1510 | |
1da177e4 | 1511 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1512 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1513 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1514 | return 0; |
1da177e4 LT |
1515 | } |
1516 | ||
1da177e4 LT |
1517 | /* |
1518 | * This function is called to parse sbp2 device's config rom unit | |
1519 | * directory. Used to determine things like sbp2 management agent offset, | |
1520 | * and command set used (SCSI or RBC). | |
1521 | */ | |
1522 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1523 | struct unit_directory *ud) | |
1524 | { | |
1525 | struct csr1212_keyval *kv; | |
1526 | struct csr1212_dentry *dentry; | |
1527 | u64 management_agent_addr; | |
1528 | u32 command_set_spec_id, command_set, unit_characteristics, | |
24d3bf88 SR |
1529 | firmware_revision; |
1530 | unsigned workarounds; | |
1da177e4 LT |
1531 | int i; |
1532 | ||
d024ebc6 | 1533 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1534 | |
1535 | management_agent_addr = 0x0; | |
1536 | command_set_spec_id = 0x0; | |
1537 | command_set = 0x0; | |
1538 | unit_characteristics = 0x0; | |
1539 | firmware_revision = 0x0; | |
1540 | ||
1541 | /* Handle different fields in the unit directory, based on keys */ | |
1542 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1543 | switch (kv->key.id) { | |
1544 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1545 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1546 | /* Save off the management agent address */ | |
1547 | management_agent_addr = | |
a237f35f SR |
1548 | CSR1212_REGISTER_SPACE_BASE + |
1549 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1550 | |
1551 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1552 | (unsigned int)management_agent_addr); |
1da177e4 | 1553 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1554 | scsi_id->sbp2_lun = |
1555 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1556 | } |
1557 | break; | |
1558 | ||
1559 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1560 | /* Command spec organization */ | |
1561 | command_set_spec_id = kv->value.immediate; | |
1562 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1563 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1564 | break; |
1565 | ||
1566 | case SBP2_COMMAND_SET_KEY: | |
1567 | /* Command set used by sbp2 device */ | |
1568 | command_set = kv->value.immediate; | |
1569 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1570 | (unsigned int)command_set); |
1da177e4 LT |
1571 | break; |
1572 | ||
1573 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1574 | /* | |
1575 | * Unit characterisitcs (orb related stuff | |
1576 | * that I'm not yet paying attention to) | |
1577 | */ | |
1578 | unit_characteristics = kv->value.immediate; | |
1579 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1580 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1581 | break; |
1582 | ||
1583 | case SBP2_FIRMWARE_REVISION_KEY: | |
1584 | /* Firmware revision */ | |
1585 | firmware_revision = kv->value.immediate; | |
24d3bf88 SR |
1586 | SBP2_DEBUG("sbp2_firmware_revision = %x", |
1587 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1588 | break; |
1589 | ||
1590 | default: | |
1591 | break; | |
1592 | } | |
1593 | } | |
1594 | ||
24d3bf88 | 1595 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1596 | |
679c0cd2 SR |
1597 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1598 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
1599 | if (sbp2_workarounds_table[i].firmware_revision && | |
1600 | sbp2_workarounds_table[i].firmware_revision != | |
1601 | (firmware_revision & 0xffff00)) | |
1602 | continue; | |
1603 | if (sbp2_workarounds_table[i].model_id && | |
1604 | sbp2_workarounds_table[i].model_id != ud->model_id) | |
1605 | continue; | |
1606 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1607 | break; | |
1608 | } | |
1da177e4 | 1609 | |
24d3bf88 | 1610 | if (workarounds) |
e9a1c52c SR |
1611 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1612 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1613 | " model_id 0x%06x)", | |
24d3bf88 | 1614 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1615 | workarounds, firmware_revision, |
1616 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1617 | ud->model_id); | |
24d3bf88 SR |
1618 | |
1619 | /* We would need one SCSI host template for each target to adjust | |
1620 | * max_sectors on the fly, therefore warn only. */ | |
1621 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
1622 | (max_sectors * 512) > (128 * 1024)) | |
1623 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB " | |
1624 | "max transfer size. WARNING: Current max_sectors " | |
1625 | "setting is larger than 128KB (%d sectors)", | |
1626 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1627 | max_sectors); | |
1628 | ||
1da177e4 LT |
1629 | /* If this is a logical unit directory entry, process the parent |
1630 | * to get the values. */ | |
1631 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1632 | struct unit_directory *parent_ud = | |
1633 | container_of(ud->device.parent, struct unit_directory, device); | |
1634 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1635 | } else { | |
1636 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1637 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1638 | scsi_id->sbp2_command_set = command_set; | |
1639 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1640 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1641 | scsi_id->workarounds = workarounds; | |
1642 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1643 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1644 | } |
1645 | } | |
1646 | ||
fd23ade8 BC |
1647 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1648 | ||
1da177e4 LT |
1649 | /* |
1650 | * This function is called in order to determine the max speed and packet | |
1651 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1652 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1653 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1654 | * device decides the actual maximum data it can transfer. We just tell it | |
1655 | * the speed that it needs to use, and the max_rec the host supports, and | |
1656 | * it takes care of the rest. | |
1657 | */ | |
1658 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1659 | { | |
1660 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
fd23ade8 | 1661 | u8 payload; |
1da177e4 | 1662 | |
d024ebc6 | 1663 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1664 | |
a237f35f | 1665 | scsi_id->speed_code = |
647dcb5f | 1666 | hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
1da177e4 LT |
1667 | |
1668 | /* Bump down our speed if the user requested it */ | |
1669 | if (scsi_id->speed_code > max_speed) { | |
1670 | scsi_id->speed_code = max_speed; | |
1671 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1672 | hpsb_speedto_str[scsi_id->speed_code]); | |
1673 | } | |
1674 | ||
1675 | /* Payload size is the lesser of what our speed supports and what | |
1676 | * our host supports. */ | |
fd23ade8 BC |
1677 | payload = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
1678 | (u8) (hi->host->csr.max_rec - 1)); | |
1679 | ||
1680 | /* If physical DMA is off, work around limitation in ohci1394: | |
1681 | * packet size must not exceed PAGE_SIZE */ | |
1682 | if (scsi_id->ne->host->low_addr_space < (1ULL << 32)) | |
1683 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && | |
1684 | payload) | |
1685 | payload--; | |
1da177e4 LT |
1686 | |
1687 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1688 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1689 | hpsb_speedto_str[scsi_id->speed_code], | |
fd23ade8 | 1690 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1691 | |
fd23ade8 | 1692 | scsi_id->max_payload_size = payload; |
a237f35f | 1693 | return 0; |
1da177e4 LT |
1694 | } |
1695 | ||
1696 | /* | |
1697 | * This function is called in order to perform a SBP-2 agent reset. | |
1698 | */ | |
1699 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1700 | { | |
1701 | quadlet_t data; | |
1702 | u64 addr; | |
1703 | int retval; | |
cc078189 | 1704 | unsigned long flags; |
1da177e4 | 1705 | |
d024ebc6 | 1706 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1707 | |
09ee67ab SR |
1708 | cancel_delayed_work(&scsi_id->protocol_work); |
1709 | if (wait) | |
1710 | flush_scheduled_work(); | |
1711 | ||
1da177e4 LT |
1712 | data = ntohl(SBP2_AGENT_RESET_DATA); |
1713 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1714 | ||
1715 | if (wait) | |
1716 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1717 | else | |
1718 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1719 | ||
1720 | if (retval < 0) { | |
1721 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1722 | return -EIO; | |
1723 | } | |
1724 | ||
1725 | /* | |
1726 | * Need to make sure orb pointer is written on next command | |
1727 | */ | |
cc078189 | 1728 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1729 | scsi_id->last_orb = NULL; |
cc078189 | 1730 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1731 | |
a237f35f | 1732 | return 0; |
1da177e4 LT |
1733 | } |
1734 | ||
cf8d2c09 SR |
1735 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1736 | struct sbp2scsi_host_info *hi, | |
1737 | struct sbp2_command_info *command, | |
1738 | unsigned int scsi_use_sg, | |
1739 | struct scatterlist *sgpnt, | |
1740 | u32 orb_direction, | |
1741 | enum dma_data_direction dma_dir) | |
1742 | { | |
1743 | command->dma_dir = dma_dir; | |
1744 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1745 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1746 | ||
1747 | /* Special case if only one element (and less than 64KB in size) */ | |
1748 | if ((scsi_use_sg == 1) && | |
1749 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1750 | ||
1751 | SBP2_DEBUG("Only one s/g element"); | |
1752 | command->dma_size = sgpnt[0].length; | |
1753 | command->dma_type = CMD_DMA_PAGE; | |
1754 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1755 | sgpnt[0].page, | |
1756 | sgpnt[0].offset, | |
1757 | command->dma_size, | |
1758 | command->dma_dir); | |
1759 | SBP2_DMA_ALLOC("single page scatter element"); | |
1760 | ||
1761 | orb->data_descriptor_lo = command->cmd_dma; | |
1762 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1763 | ||
1764 | } else { | |
1765 | struct sbp2_unrestricted_page_table *sg_element = | |
1766 | &command->scatter_gather_element[0]; | |
1767 | u32 sg_count, sg_len; | |
1768 | dma_addr_t sg_addr; | |
1769 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1770 | dma_dir); | |
1771 | ||
1772 | SBP2_DMA_ALLOC("scatter list"); | |
1773 | ||
1774 | command->dma_size = scsi_use_sg; | |
1775 | command->sge_buffer = sgpnt; | |
1776 | ||
1777 | /* use page tables (s/g) */ | |
1778 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1779 | orb->data_descriptor_lo = command->sge_dma; | |
1780 | ||
1781 | /* | |
1782 | * Loop through and fill out our sbp-2 page tables | |
1783 | * (and split up anything too large) | |
1784 | */ | |
1785 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1786 | sg_len = sg_dma_len(sgpnt); | |
1787 | sg_addr = sg_dma_address(sgpnt); | |
1788 | while (sg_len) { | |
1789 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1790 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1791 | sg_element[sg_count].length_segment_base_hi = | |
1792 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1793 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1794 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1795 | } else { | |
1796 | sg_element[sg_count].length_segment_base_hi = | |
1797 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1798 | sg_len = 0; | |
1799 | } | |
1800 | sg_count++; | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | /* Number of page table (s/g) elements */ | |
1805 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1806 | ||
1807 | sbp2util_packet_dump(sg_element, | |
1808 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1809 | "sbp2 s/g list", command->sge_dma); | |
1810 | ||
1811 | /* Byte swap page tables if necessary */ | |
1812 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1813 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1814 | sg_count); | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1819 | struct sbp2scsi_host_info *hi, | |
1820 | struct sbp2_command_info *command, | |
1821 | struct scatterlist *sgpnt, | |
1822 | u32 orb_direction, | |
1823 | unsigned int scsi_request_bufflen, | |
1824 | void *scsi_request_buffer, | |
1825 | enum dma_data_direction dma_dir) | |
1826 | { | |
1827 | command->dma_dir = dma_dir; | |
1828 | command->dma_size = scsi_request_bufflen; | |
1829 | command->dma_type = CMD_DMA_SINGLE; | |
1830 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1831 | command->dma_size, command->dma_dir); | |
1832 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1833 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1834 | ||
1835 | SBP2_DMA_ALLOC("single bulk"); | |
1836 | ||
1837 | /* | |
1838 | * Handle case where we get a command w/o s/g enabled (but | |
1839 | * check for transfers larger than 64K) | |
1840 | */ | |
1841 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1842 | ||
1843 | orb->data_descriptor_lo = command->cmd_dma; | |
1844 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1845 | ||
1846 | } else { | |
1847 | struct sbp2_unrestricted_page_table *sg_element = | |
1848 | &command->scatter_gather_element[0]; | |
1849 | u32 sg_count, sg_len; | |
1850 | dma_addr_t sg_addr; | |
1851 | ||
1852 | /* | |
1853 | * Need to turn this into page tables, since the | |
1854 | * buffer is too large. | |
1855 | */ | |
1856 | orb->data_descriptor_lo = command->sge_dma; | |
1857 | ||
1858 | /* Use page tables (s/g) */ | |
1859 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1860 | ||
1861 | /* | |
1862 | * fill out our sbp-2 page tables (and split up | |
1863 | * the large buffer) | |
1864 | */ | |
1865 | sg_count = 0; | |
1866 | sg_len = scsi_request_bufflen; | |
1867 | sg_addr = command->cmd_dma; | |
1868 | while (sg_len) { | |
1869 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1870 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1871 | sg_element[sg_count].length_segment_base_hi = | |
1872 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1873 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1874 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1875 | } else { | |
1876 | sg_element[sg_count].length_segment_base_hi = | |
1877 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1878 | sg_len = 0; | |
1879 | } | |
1880 | sg_count++; | |
1881 | } | |
1882 | ||
1883 | /* Number of page table (s/g) elements */ | |
1884 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1885 | ||
1886 | sbp2util_packet_dump(sg_element, | |
1887 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1888 | "sbp2 s/g list", command->sge_dma); | |
1889 | ||
1890 | /* Byte swap page tables if necessary */ | |
1891 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1892 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1893 | sg_count); | |
1894 | } | |
1895 | } | |
1896 | ||
1da177e4 LT |
1897 | /* |
1898 | * This function is called to create the actual command orb and s/g list | |
1899 | * out of the scsi command itself. | |
1900 | */ | |
cf8d2c09 SR |
1901 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1902 | struct sbp2_command_info *command, | |
1903 | unchar *scsi_cmd, | |
1904 | unsigned int scsi_use_sg, | |
1905 | unsigned int scsi_request_bufflen, | |
1906 | void *scsi_request_buffer, | |
1907 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1908 | { |
1909 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1910 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1911 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1912 | u32 orb_direction; |
1da177e4 LT |
1913 | |
1914 | /* | |
1915 | * Set-up our command ORB.. | |
1916 | * | |
1917 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1918 | * best performance (at least with the devices I have). This means | |
1919 | * that data_size becomes the number of s/g elements, and | |
1920 | * page_size should be zero (for unrestricted). | |
1921 | */ | |
1922 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1923 | command_orb->next_ORB_lo = 0x0; | |
1924 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1925 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1926 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1927 | |
43863eba | 1928 | if (dma_dir == DMA_NONE) |
a237f35f | 1929 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1930 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1931 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1932 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1933 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1934 | else { |
1935 | SBP2_WARN("Falling back to DMA_NONE"); | |
1936 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1937 | } |
1938 | ||
cf8d2c09 | 1939 | /* Set-up our pagetable stuff */ |
1da177e4 | 1940 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1941 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1942 | command_orb->data_descriptor_hi = 0x0; |
1943 | command_orb->data_descriptor_lo = 0x0; | |
1944 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1945 | } else if (scsi_use_sg) { |
1da177e4 | 1946 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1947 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1948 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1949 | } else { |
1da177e4 | 1950 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1951 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1952 | orb_direction, scsi_request_bufflen, | |
1953 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1954 | } |
1955 | ||
cf8d2c09 | 1956 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1957 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1958 | ||
cf8d2c09 | 1959 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1960 | memset(command_orb->cdb, 0, 12); |
1961 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1962 | } |
1963 | ||
1964 | /* | |
1965 | * This function is called in order to begin a regular SBP-2 command. | |
1966 | */ | |
28212767 | 1967 | static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
1968 | struct sbp2_command_info *command) |
1969 | { | |
1970 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1971 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
cc078189 SR |
1972 | struct sbp2_command_orb *last_orb; |
1973 | dma_addr_t last_orb_dma; | |
1974 | u64 addr = scsi_id->sbp2_command_block_agent_addr; | |
1975 | quadlet_t data[2]; | |
1976 | size_t length; | |
1977 | unsigned long flags; | |
1da177e4 LT |
1978 | |
1979 | outstanding_orb_incr; | |
1980 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1981 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1982 | |
1983 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1984 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1985 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1986 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
1987 | sizeof(command->scatter_gather_element), | |
1988 | PCI_DMA_BIDIRECTIONAL); | |
1989 | /* | |
1990 | * Check to see if there are any previous orbs to use | |
1991 | */ | |
cc078189 SR |
1992 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1993 | last_orb = scsi_id->last_orb; | |
1994 | last_orb_dma = scsi_id->last_orb_dma; | |
1995 | if (!last_orb) { | |
1da177e4 | 1996 | /* |
cc078189 SR |
1997 | * last_orb == NULL means: We know that the target's fetch agent |
1998 | * is not active right now. | |
1da177e4 | 1999 | */ |
cc078189 | 2000 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 LT |
2001 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
2002 | data[1] = command->command_orb_dma; | |
2003 | sbp2util_cpu_to_be32_buffer(data, 8); | |
cc078189 | 2004 | length = 8; |
1da177e4 | 2005 | } else { |
1da177e4 | 2006 | /* |
cc078189 SR |
2007 | * last_orb != NULL means: We know that the target's fetch agent |
2008 | * is (very probably) not dead or in reset state right now. | |
2009 | * We have an ORB already sent that we can append a new one to. | |
2010 | * The target's fetch agent may or may not have read this | |
2011 | * previous ORB yet. | |
1da177e4 | 2012 | */ |
cc078189 SR |
2013 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
2014 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2015 | PCI_DMA_TODEVICE); |
cc078189 SR |
2016 | last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); |
2017 | wmb(); | |
1da177e4 | 2018 | /* Tells hardware that this pointer is valid */ |
cc078189 SR |
2019 | last_orb->next_ORB_hi = 0; |
2020 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, | |
1da177e4 | 2021 | sizeof(struct sbp2_command_orb), |
d4018d7f | 2022 | PCI_DMA_TODEVICE); |
cc078189 SR |
2023 | addr += SBP2_DOORBELL_OFFSET; |
2024 | data[0] = 0; | |
2025 | length = 4; | |
2026 | } | |
2027 | scsi_id->last_orb = command_orb; | |
2028 | scsi_id->last_orb_dma = command->command_orb_dma; | |
2029 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
1da177e4 | 2030 | |
cc078189 SR |
2031 | SBP2_ORB_DEBUG("write to %s register, command orb %p", |
2032 | last_orb ? "DOORBELL" : "ORB_POINTER", command_orb); | |
09ee67ab SR |
2033 | if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) { |
2034 | /* | |
2035 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
2036 | * of transaction labels, perhaps just because there were no | |
2037 | * context switches which gave khpsbpkt a chance to collect | |
2038 | * free tlabels. Try again in non-atomic context. If necessary, | |
2039 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
2040 | * We do not accept new commands until the job is over. | |
2041 | */ | |
2042 | scsi_block_requests(scsi_id->scsi_host); | |
2043 | PREPARE_WORK(&scsi_id->protocol_work, | |
2044 | last_orb ? sbp2util_write_doorbell: | |
2045 | sbp2util_write_orb_pointer, | |
2046 | scsi_id); | |
2047 | schedule_work(&scsi_id->protocol_work); | |
2048 | } | |
1da177e4 LT |
2049 | } |
2050 | ||
2051 | /* | |
2052 | * This function is called in order to begin a regular SBP-2 command. | |
2053 | */ | |
2054 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
2055 | struct scsi_cmnd *SCpnt, | |
2056 | void (*done)(struct scsi_cmnd *)) | |
2057 | { | |
2058 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
2059 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
2060 | struct sbp2_command_info *command; | |
2061 | ||
d024ebc6 | 2062 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2063 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
2064 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2065 | ||
2066 | /* | |
2067 | * Allocate a command orb and s/g structure | |
2068 | */ | |
2069 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2070 | if (!command) { | |
a237f35f | 2071 | return -EIO; |
1da177e4 LT |
2072 | } |
2073 | ||
1da177e4 LT |
2074 | /* |
2075 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2076 | */ | |
2077 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2078 | request_bufflen, SCpnt->request_buffer, | |
2079 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2080 | |
2081 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2082 | "sbp2 command orb", command->command_orb_dma); | |
2083 | ||
1da177e4 LT |
2084 | /* |
2085 | * Link up the orb, and ring the doorbell if needed | |
2086 | */ | |
2087 | sbp2_link_orb_command(scsi_id, command); | |
2088 | ||
a237f35f | 2089 | return 0; |
1da177e4 LT |
2090 | } |
2091 | ||
1da177e4 LT |
2092 | /* |
2093 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2094 | */ | |
2095 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2096 | { | |
d024ebc6 | 2097 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2098 | |
2099 | /* | |
2100 | * Ok, it's pretty ugly... ;-) | |
2101 | */ | |
2102 | sense_data[0] = 0x70; | |
2103 | sense_data[1] = 0x0; | |
2104 | sense_data[2] = sbp2_status[9]; | |
2105 | sense_data[3] = sbp2_status[12]; | |
2106 | sense_data[4] = sbp2_status[13]; | |
2107 | sense_data[5] = sbp2_status[14]; | |
2108 | sense_data[6] = sbp2_status[15]; | |
2109 | sense_data[7] = 10; | |
2110 | sense_data[8] = sbp2_status[16]; | |
2111 | sense_data[9] = sbp2_status[17]; | |
2112 | sense_data[10] = sbp2_status[18]; | |
2113 | sense_data[11] = sbp2_status[19]; | |
2114 | sense_data[12] = sbp2_status[10]; | |
2115 | sense_data[13] = sbp2_status[11]; | |
2116 | sense_data[14] = sbp2_status[20]; | |
2117 | sense_data[15] = sbp2_status[21]; | |
2118 | ||
a237f35f | 2119 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2120 | } |
2121 | ||
1da177e4 LT |
2122 | /* |
2123 | * This function deals with status writes from the SBP-2 device | |
2124 | */ | |
3e98eab4 SR |
2125 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
2126 | int destid, quadlet_t *data, u64 addr, | |
2127 | size_t length, u16 fl) | |
1da177e4 LT |
2128 | { |
2129 | struct sbp2scsi_host_info *hi; | |
2130 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 | 2131 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 2132 | struct sbp2_status_block *sb; |
1da177e4 LT |
2133 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
2134 | struct sbp2_command_info *command; | |
79456197 | 2135 | unsigned long flags; |
1da177e4 | 2136 | |
d024ebc6 | 2137 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2138 | |
2139 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2140 | ||
6065772d SR |
2141 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
2142 | SBP2_ERR("Wrong size of status block"); | |
2143 | return RCODE_ADDRESS_ERROR; | |
2144 | } | |
2145 | if (unlikely(!host)) { | |
1da177e4 | 2146 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 2147 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2148 | } |
1da177e4 | 2149 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 2150 | if (unlikely(!hi)) { |
1da177e4 | 2151 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 2152 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2153 | } |
1da177e4 | 2154 | /* |
35bdddb8 SR |
2155 | * Find our scsi_id structure by looking at the status fifo address |
2156 | * written to by the sbp2 device. | |
1da177e4 | 2157 | */ |
1da177e4 | 2158 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2159 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2160 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2161 | scsi_id = scsi_id_tmp; |
2162 | break; | |
2163 | } | |
2164 | } | |
6065772d | 2165 | if (unlikely(!scsi_id)) { |
1da177e4 | 2166 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
a237f35f | 2167 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2168 | } |
2169 | ||
2170 | /* | |
3e98eab4 SR |
2171 | * Put response into scsi_id status fifo buffer. The first two bytes |
2172 | * come in big endian bit order. Often the target writes only a | |
2173 | * truncated status block, minimally the first two quadlets. The rest | |
2174 | * is implied to be zeros. | |
1da177e4 | 2175 | */ |
3e98eab4 SR |
2176 | sb = &scsi_id->status_block; |
2177 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); | |
2178 | memcpy(sb, data, length); | |
2179 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 LT |
2180 | |
2181 | /* | |
6065772d | 2182 | * Ignore unsolicited status. Handle command ORB status. |
1da177e4 | 2183 | */ |
6065772d SR |
2184 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
2185 | command = NULL; | |
2186 | else | |
2187 | command = sbp2util_find_command_for_orb(scsi_id, | |
2188 | sb->ORB_offset_lo); | |
1da177e4 | 2189 | if (command) { |
1da177e4 LT |
2190 | SBP2_DEBUG("Found status for command ORB"); |
2191 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2192 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2193 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2194 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2195 | sizeof(command->scatter_gather_element), | |
2196 | PCI_DMA_BIDIRECTIONAL); | |
2197 | ||
2198 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2199 | outstanding_orb_decr; | |
2200 | ||
2201 | /* | |
3e98eab4 SR |
2202 | * Matched status with command, now grab scsi command pointers |
2203 | * and check status. | |
1da177e4 | 2204 | */ |
6065772d SR |
2205 | /* |
2206 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
2207 | * not be reused until status for a subsequent ORB is received. | |
2208 | */ | |
1da177e4 | 2209 | SCpnt = command->Current_SCpnt; |
24c7cd06 | 2210 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 2211 | sbp2util_mark_command_completed(scsi_id, command); |
24c7cd06 | 2212 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2213 | |
2214 | if (SCpnt) { | |
6065772d SR |
2215 | if (STATUS_TEST_RS(sb->ORB_offset_hi_misc)) |
2216 | scsi_status = | |
2217 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; | |
1da177e4 | 2218 | /* |
3e98eab4 | 2219 | * See if the target stored any scsi status information. |
1da177e4 | 2220 | */ |
6065772d | 2221 | if (STATUS_GET_LEN(sb->ORB_offset_hi_misc) > 1) { |
1da177e4 | 2222 | SBP2_DEBUG("CHECK CONDITION"); |
3e98eab4 SR |
2223 | scsi_status = sbp2_status_to_sense_data( |
2224 | (unchar *)sb, SCpnt->sense_buffer); | |
1da177e4 LT |
2225 | } |
2226 | ||
2227 | /* | |
3e98eab4 SR |
2228 | * Check to see if the dead bit is set. If so, we'll |
2229 | * have to initiate a fetch agent reset. | |
1da177e4 | 2230 | */ |
6065772d | 2231 | if (STATUS_TEST_D(sb->ORB_offset_hi_misc)) { |
3e98eab4 SR |
2232 | SBP2_DEBUG("Dead bit set - " |
2233 | "initiating fetch agent reset"); | |
1da177e4 LT |
2234 | sbp2_agent_reset(scsi_id, 0); |
2235 | } | |
2236 | ||
2237 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2238 | } | |
2239 | ||
2240 | /* | |
cc078189 SR |
2241 | * Check here to see if there are no commands in-use. If there |
2242 | * are none, we know that the fetch agent left the active state | |
2243 | * _and_ that we did not reactivate it yet. Therefore clear | |
2244 | * last_orb so that next time we write directly to the | |
2245 | * ORB_POINTER register. That way the fetch agent does not need | |
2246 | * to refetch the next_ORB. | |
1da177e4 | 2247 | */ |
79456197 | 2248 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
cc078189 | 2249 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) |
1da177e4 | 2250 | scsi_id->last_orb = NULL; |
79456197 | 2251 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2252 | |
2253 | } else { | |
1da177e4 LT |
2254 | /* |
2255 | * It's probably a login/logout/reconnect status. | |
2256 | */ | |
3e98eab4 SR |
2257 | if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || |
2258 | (sb->ORB_offset_lo == scsi_id->login_orb_dma) || | |
2259 | (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || | |
e8398bb7 SR |
2260 | (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { |
2261 | scsi_id->access_complete = 1; | |
2262 | wake_up_interruptible(&access_wq); | |
2263 | } | |
1da177e4 LT |
2264 | } |
2265 | ||
2266 | if (SCpnt) { | |
1da177e4 LT |
2267 | SBP2_DEBUG("Completing SCSI command"); |
2268 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2269 | command->Current_done); | |
2270 | SBP2_ORB_DEBUG("command orb completed"); | |
2271 | } | |
2272 | ||
a237f35f | 2273 | return RCODE_COMPLETE; |
1da177e4 LT |
2274 | } |
2275 | ||
1da177e4 LT |
2276 | /************************************** |
2277 | * SCSI interface related section | |
2278 | **************************************/ | |
2279 | ||
2280 | /* | |
2281 | * This routine is the main request entry routine for doing I/O. It is | |
2282 | * called from the scsi stack directly. | |
2283 | */ | |
2284 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2285 | void (*done)(struct scsi_cmnd *)) | |
2286 | { | |
2287 | struct scsi_id_instance_data *scsi_id = | |
2288 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2289 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2290 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 2291 | |
d024ebc6 SR |
2292 | SBP2_DEBUG_ENTER(); |
2293 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2294 | scsi_print_command(SCpnt); | |
2295 | #endif | |
1da177e4 | 2296 | |
abd559b1 JM |
2297 | if (!sbp2util_node_is_available(scsi_id)) |
2298 | goto done; | |
1da177e4 LT |
2299 | |
2300 | hi = scsi_id->hi; | |
2301 | ||
2302 | if (!hi) { | |
2303 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2304 | goto done; |
1da177e4 LT |
2305 | } |
2306 | ||
2307 | /* | |
2308 | * Until we handle multiple luns, just return selection time-out | |
2309 | * to any IO directed at non-zero LUNs | |
2310 | */ | |
abd559b1 JM |
2311 | if (SCpnt->device->lun) |
2312 | goto done; | |
1da177e4 LT |
2313 | |
2314 | /* | |
2315 | * Check for request sense command, and handle it here | |
2316 | * (autorequest sense) | |
2317 | */ | |
2318 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2319 | SBP2_DEBUG("REQUEST_SENSE"); | |
2320 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2321 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2322 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2323 | return 0; |
1da177e4 LT |
2324 | } |
2325 | ||
2326 | /* | |
2327 | * Check to see if we are in the middle of a bus reset. | |
2328 | */ | |
2329 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2330 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2331 | result = DID_BUS_BUSY << 16; |
2332 | goto done; | |
1da177e4 LT |
2333 | } |
2334 | ||
43863eba SR |
2335 | /* |
2336 | * Bidirectional commands are not yet implemented, | |
2337 | * and unknown transfer direction not handled. | |
2338 | */ | |
2339 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2340 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2341 | result = DID_ERROR << 16; | |
2342 | goto done; | |
2343 | } | |
2344 | ||
1da177e4 LT |
2345 | /* |
2346 | * Try and send our SCSI command | |
2347 | */ | |
2348 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2349 | SBP2_ERR("Error sending SCSI command"); | |
2350 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2351 | SCpnt, done); | |
2352 | } | |
abd559b1 | 2353 | return 0; |
1da177e4 | 2354 | |
abd559b1 JM |
2355 | done: |
2356 | SCpnt->result = result; | |
2357 | done(SCpnt); | |
2358 | return 0; | |
1da177e4 LT |
2359 | } |
2360 | ||
2361 | /* | |
2362 | * This function is called in order to complete all outstanding SBP-2 | |
2363 | * commands (in case of resets, etc.). | |
2364 | */ | |
2365 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2366 | u32 status) | |
2367 | { | |
2368 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2369 | struct list_head *lh; | |
2370 | struct sbp2_command_info *command; | |
79456197 | 2371 | unsigned long flags; |
1da177e4 | 2372 | |
d024ebc6 | 2373 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2374 | |
79456197 | 2375 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2376 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2377 | SBP2_DEBUG("Found pending command to complete"); | |
2378 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2379 | command = list_entry(lh, struct sbp2_command_info, list); | |
2380 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2381 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2382 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2383 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2384 | sizeof(command->scatter_gather_element), | |
2385 | PCI_DMA_BIDIRECTIONAL); | |
2386 | sbp2util_mark_command_completed(scsi_id, command); | |
2387 | if (command->Current_SCpnt) { | |
2388 | command->Current_SCpnt->result = status << 16; | |
2389 | command->Current_done(command->Current_SCpnt); | |
2390 | } | |
2391 | } | |
79456197 | 2392 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2393 | |
2394 | return; | |
2395 | } | |
2396 | ||
2397 | /* | |
2398 | * This function is called in order to complete a regular SBP-2 command. | |
2399 | * | |
2400 | * This can be called in interrupt context. | |
2401 | */ | |
2402 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2403 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2404 | void (*done)(struct scsi_cmnd *)) | |
2405 | { | |
d024ebc6 | 2406 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2407 | |
2408 | /* | |
2409 | * Sanity | |
2410 | */ | |
2411 | if (!SCpnt) { | |
2412 | SBP2_ERR("SCpnt is NULL"); | |
2413 | return; | |
2414 | } | |
2415 | ||
2416 | /* | |
2417 | * If a bus reset is in progress and there was an error, don't | |
2418 | * complete the command, just let it get retried at the end of the | |
2419 | * bus reset. | |
2420 | */ | |
a237f35f SR |
2421 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2422 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2423 | SBP2_ERR("Bus reset in progress - retry command later"); |
2424 | return; | |
2425 | } | |
a237f35f | 2426 | |
1da177e4 LT |
2427 | /* |
2428 | * Switch on scsi status | |
2429 | */ | |
2430 | switch (scsi_status) { | |
a237f35f | 2431 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 2432 | SCpnt->result = DID_OK << 16; |
a237f35f | 2433 | break; |
1da177e4 | 2434 | |
a237f35f SR |
2435 | case SBP2_SCSI_STATUS_BUSY: |
2436 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2437 | SCpnt->result = DID_BUS_BUSY << 16; | |
2438 | break; | |
1da177e4 | 2439 | |
a237f35f SR |
2440 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2441 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
8f0525ff | 2442 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
1da177e4 | 2443 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f | 2444 | scsi_print_command(SCpnt); |
d024ebc6 | 2445 | scsi_print_sense(SBP2_DEVICE_NAME, SCpnt); |
1da177e4 | 2446 | #endif |
a237f35f | 2447 | break; |
1da177e4 | 2448 | |
a237f35f SR |
2449 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2450 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2451 | SCpnt->result = DID_NO_CONNECT << 16; | |
2452 | scsi_print_command(SCpnt); | |
2453 | break; | |
1da177e4 | 2454 | |
a237f35f SR |
2455 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2456 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2457 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2458 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2459 | SCpnt->result = DID_ERROR << 16; | |
2460 | scsi_print_command(SCpnt); | |
2461 | break; | |
1da177e4 | 2462 | |
a237f35f SR |
2463 | default: |
2464 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2465 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2466 | } |
2467 | ||
1da177e4 LT |
2468 | /* |
2469 | * If a bus reset is in progress and there was an error, complete | |
2470 | * the command as busy so that it will get retried. | |
2471 | */ | |
a237f35f SR |
2472 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2473 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2474 | SBP2_ERR("Completing command with busy (bus reset)"); |
2475 | SCpnt->result = DID_BUS_BUSY << 16; | |
2476 | } | |
2477 | ||
2478 | /* | |
2479 | * If a unit attention occurs, return busy status so it gets | |
2480 | * retried... it could have happened because of a 1394 bus reset | |
2481 | * or hot-plug... | |
8f0525ff SR |
2482 | * XXX DID_BUS_BUSY is actually a bad idea because it will defy |
2483 | * the scsi layer's retry logic. | |
1da177e4 LT |
2484 | */ |
2485 | #if 0 | |
2486 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2487 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2488 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2489 | SCpnt->result = DID_BUS_BUSY << 16; | |
2490 | } | |
2491 | #endif | |
2492 | ||
2493 | /* | |
2494 | * Tell scsi stack that we're done with this command | |
2495 | */ | |
a237f35f | 2496 | done(SCpnt); |
1da177e4 LT |
2497 | } |
2498 | ||
abd559b1 | 2499 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2500 | { |
a80614d1 SR |
2501 | struct scsi_id_instance_data *scsi_id = |
2502 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2503 | ||
2504 | scsi_id->sdev = sdev; | |
2505 | ||
24d3bf88 | 2506 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2507 | sdev->inquiry_len = 36; |
abd559b1 JM |
2508 | return 0; |
2509 | } | |
2510 | ||
abd559b1 JM |
2511 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2512 | { | |
24d3bf88 SR |
2513 | struct scsi_id_instance_data *scsi_id = |
2514 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2515 | ||
abd559b1 | 2516 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f BC |
2517 | sdev->use_10_for_rw = 1; |
2518 | sdev->use_10_for_ms = 1; | |
24d3bf88 SR |
2519 | |
2520 | if (sdev->type == TYPE_DISK && | |
2521 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2522 | sdev->skip_ms_page_8 = 1; | |
e9a1c52c SR |
2523 | if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
2524 | sdev->fix_capacity = 1; | |
31a379e1 SR |
2525 | if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */ |
2526 | (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC)) | |
2527 | sdev->allow_restart = 1; | |
1da177e4 LT |
2528 | return 0; |
2529 | } | |
2530 | ||
abd559b1 JM |
2531 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2532 | { | |
2533 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2534 | return; | |
2535 | } | |
2536 | ||
1da177e4 LT |
2537 | /* |
2538 | * Called by scsi stack when something has really gone wrong. Usually | |
2539 | * called when a command has timed-out for some reason. | |
2540 | */ | |
2541 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2542 | { | |
2543 | struct scsi_id_instance_data *scsi_id = | |
2544 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2545 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2546 | struct sbp2_command_info *command; | |
24c7cd06 | 2547 | unsigned long flags; |
1da177e4 LT |
2548 | |
2549 | SBP2_ERR("aborting sbp2 command"); | |
2550 | scsi_print_command(SCpnt); | |
2551 | ||
abd559b1 | 2552 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2553 | |
2554 | /* | |
2555 | * Right now, just return any matching command structures | |
2556 | * to the free pool. | |
2557 | */ | |
24c7cd06 | 2558 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2559 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2560 | if (command) { | |
2561 | SBP2_DEBUG("Found command to abort"); | |
2562 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2563 | command->command_orb_dma, | |
2564 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2565 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2566 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2567 | command->sge_dma, | |
2568 | sizeof(command->scatter_gather_element), | |
2569 | PCI_DMA_BIDIRECTIONAL); | |
2570 | sbp2util_mark_command_completed(scsi_id, command); | |
2571 | if (command->Current_SCpnt) { | |
2572 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2573 | command->Current_done(command->Current_SCpnt); | |
2574 | } | |
2575 | } | |
24c7cd06 | 2576 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2577 | |
2578 | /* | |
2579 | * Initiate a fetch agent reset. | |
2580 | */ | |
1f427e80 | 2581 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2582 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
2583 | } | |
2584 | ||
a237f35f | 2585 | return SUCCESS; |
1da177e4 LT |
2586 | } |
2587 | ||
2588 | /* | |
2589 | * Called by scsi stack when something has really gone wrong. | |
2590 | */ | |
abd559b1 | 2591 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2592 | { |
2593 | struct scsi_id_instance_data *scsi_id = | |
2594 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2595 | ||
2596 | SBP2_ERR("reset requested"); | |
2597 | ||
abd559b1 | 2598 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 | 2599 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
1f427e80 | 2600 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2601 | } |
2602 | ||
abd559b1 | 2603 | return SUCCESS; |
94d0e7b8 JG |
2604 | } |
2605 | ||
a237f35f SR |
2606 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2607 | struct device_attribute *attr, | |
2608 | char *buf) | |
1da177e4 LT |
2609 | { |
2610 | struct scsi_device *sdev; | |
2611 | struct scsi_id_instance_data *scsi_id; | |
2612 | int lun; | |
2613 | ||
2614 | if (!(sdev = to_scsi_device(dev))) | |
2615 | return 0; | |
2616 | ||
2617 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2618 | return 0; | |
2619 | ||
e309fc6d | 2620 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2621 | |
2622 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2623 | scsi_id->ud->id, lun); | |
2624 | } | |
2625 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2626 | ||
2627 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2628 | &dev_attr_ieee1394_id, | |
2629 | NULL | |
2630 | }; | |
2631 | ||
2632 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2633 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2634 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2635 | MODULE_LICENSE("GPL"); | |
2636 | ||
2637 | /* SCSI host template */ | |
2638 | static struct scsi_host_template scsi_driver_template = { | |
2639 | .module = THIS_MODULE, | |
2640 | .name = "SBP-2 IEEE-1394", | |
2641 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2642 | .queuecommand = sbp2scsi_queuecommand, |
2643 | .eh_abort_handler = sbp2scsi_abort, | |
2644 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2645 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2646 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2647 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2648 | .this_id = -1, |
2649 | .sg_tablesize = SG_ALL, | |
2650 | .use_clustering = ENABLE_CLUSTERING, | |
2651 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2652 | .can_queue = SBP2_MAX_CMDS, | |
2653 | .emulated = 1, | |
2654 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2655 | }; | |
2656 | ||
2657 | static int sbp2_module_init(void) | |
2658 | { | |
2659 | int ret; | |
2660 | ||
d024ebc6 | 2661 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2662 | |
1da177e4 LT |
2663 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2664 | if (serialize_io) { | |
2bab359a JM |
2665 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2666 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2667 | scsi_driver_template.can_queue = 1; |
2668 | scsi_driver_template.cmd_per_lun = 1; | |
2669 | } | |
2670 | ||
24d3bf88 SR |
2671 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
2672 | (max_sectors * 512) > (128 * 1024)) | |
2673 | max_sectors = 128 * 1024 / 512; | |
1da177e4 LT |
2674 | scsi_driver_template.max_sectors = max_sectors; |
2675 | ||
1da177e4 LT |
2676 | /* Register our high level driver with 1394 stack */ |
2677 | hpsb_register_highlevel(&sbp2_highlevel); | |
2678 | ||
2679 | ret = hpsb_register_protocol(&sbp2_driver); | |
2680 | if (ret) { | |
2681 | SBP2_ERR("Failed to register protocol"); | |
2682 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2683 | return ret; | |
2684 | } | |
2685 | ||
2686 | return 0; | |
2687 | } | |
2688 | ||
2689 | static void __exit sbp2_module_exit(void) | |
2690 | { | |
d024ebc6 | 2691 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2692 | |
2693 | hpsb_unregister_protocol(&sbp2_driver); | |
2694 | ||
2695 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2696 | } | |
2697 | ||
2698 | module_init(sbp2_module_init); | |
2699 | module_exit(sbp2_module_exit); |