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1da177e4 LT |
1 | /* |
2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 | |
3 | * | |
4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) | |
5 | * jamesg@filanet.com (JSG) | |
6 | * | |
7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software Foundation, | |
21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Brief Description: | |
26 | * | |
27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 | |
28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level | |
29 | * driver. It also registers as a SCSI lower-level driver in order to accept | |
30 | * SCSI commands for transport using SBP-2. | |
31 | * | |
2a533b17 SR |
32 | * You may access any attached SBP-2 (usually storage devices) as regular |
33 | * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc.. | |
1da177e4 | 34 | * |
2a533b17 SR |
35 | * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2 |
36 | * specification and for where to purchase the official standard. | |
1da177e4 | 37 | * |
2a533b17 SR |
38 | * TODO: |
39 | * - look into possible improvements of the SCSI error handlers | |
40 | * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size | |
41 | * - handle Logical_Unit_Number.ordered | |
42 | * - handle src == 1 in status blocks | |
43 | * - reimplement the DMA mapping in absence of physical DMA so that | |
44 | * bus_to_virt is no longer required | |
45 | * - debug the handling of absent physical DMA | |
46 | * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection | |
47 | * (this is easy but depends on the previous two TODO items) | |
48 | * - make the parameter serialize_io configurable per device | |
49 | * - move all requests to fetch agent registers into non-atomic context, | |
50 | * replace all usages of sbp2util_node_write_no_wait by true transactions | |
2a533b17 | 51 | * Grep for inline FIXME comments below. |
1da177e4 LT |
52 | */ |
53 | ||
4e6343a1 | 54 | #include <linux/blkdev.h> |
902abed1 SR |
55 | #include <linux/compiler.h> |
56 | #include <linux/delay.h> | |
57 | #include <linux/device.h> | |
58 | #include <linux/dma-mapping.h> | |
59 | #include <linux/gfp.h> | |
60 | #include <linux/init.h> | |
1da177e4 LT |
61 | #include <linux/kernel.h> |
62 | #include <linux/list.h> | |
f84c922b | 63 | #include <linux/mm.h> |
1da177e4 LT |
64 | #include <linux/module.h> |
65 | #include <linux/moduleparam.h> | |
f84c922b | 66 | #include <linux/sched.h> |
902abed1 SR |
67 | #include <linux/slab.h> |
68 | #include <linux/spinlock.h> | |
69 | #include <linux/stat.h> | |
70 | #include <linux/string.h> | |
71 | #include <linux/stringify.h> | |
72 | #include <linux/types.h> | |
e8398bb7 | 73 | #include <linux/wait.h> |
20e2008e | 74 | #include <linux/workqueue.h> |
87ae9afd | 75 | #include <linux/scatterlist.h> |
1da177e4 | 76 | |
1da177e4 | 77 | #include <asm/byteorder.h> |
902abed1 SR |
78 | #include <asm/errno.h> |
79 | #include <asm/param.h> | |
902abed1 SR |
80 | #include <asm/system.h> |
81 | #include <asm/types.h> | |
82 | ||
83 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
84 | #include <asm/io.h> /* for bus_to_virt */ | |
85 | #endif | |
1da177e4 LT |
86 | |
87 | #include <scsi/scsi.h> | |
88 | #include <scsi/scsi_cmnd.h> | |
89 | #include <scsi/scsi_dbg.h> | |
90 | #include <scsi/scsi_device.h> | |
91 | #include <scsi/scsi_host.h> | |
92 | ||
93 | #include "csr1212.h" | |
902abed1 SR |
94 | #include "highlevel.h" |
95 | #include "hosts.h" | |
1da177e4 | 96 | #include "ieee1394.h" |
1da177e4 | 97 | #include "ieee1394_core.h" |
902abed1 | 98 | #include "ieee1394_hotplug.h" |
1da177e4 | 99 | #include "ieee1394_transactions.h" |
902abed1 SR |
100 | #include "ieee1394_types.h" |
101 | #include "nodemgr.h" | |
1da177e4 LT |
102 | #include "sbp2.h" |
103 | ||
1da177e4 LT |
104 | /* |
105 | * Module load parameter definitions | |
106 | */ | |
107 | ||
108 | /* | |
109 | * Change max_speed on module load if you have a bad IEEE-1394 | |
110 | * controller that has trouble running 2KB packets at 400mb. | |
111 | * | |
112 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
113 | * (probably due to PCI latency/throughput issues with the part). You can | |
114 | * bump down the speed if you are running into problems. | |
115 | */ | |
ca0c7453 SR |
116 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
117 | module_param_named(max_speed, sbp2_max_speed, int, 0644); | |
28b06679 SR |
118 | MODULE_PARM_DESC(max_speed, "Force max speed " |
119 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); | |
1da177e4 LT |
120 | |
121 | /* | |
77bba7ae SR |
122 | * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs. |
123 | * This is and always has been buggy in multiple subtle ways. See above TODOs. | |
1da177e4 | 124 | */ |
ca0c7453 | 125 | static int sbp2_serialize_io = 1; |
77bba7ae SR |
126 | module_param_named(serialize_io, sbp2_serialize_io, bool, 0444); |
127 | MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers " | |
128 | "(default = Y, faster but buggy = N)"); | |
1da177e4 LT |
129 | |
130 | /* | |
4e6343a1 SR |
131 | * Adjust max_sectors if you'd like to influence how many sectors each SCSI |
132 | * command can transfer at most. Please note that some older SBP-2 bridge | |
133 | * chips are broken for transfers greater or equal to 128KB, therefore | |
134 | * max_sectors used to be a safe 255 sectors for many years. We now have a | |
135 | * default of 0 here which means that we let the SCSI stack choose a limit. | |
136 | * | |
137 | * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds | |
138 | * module parameter or in the sbp2_workarounds_table[], will override the | |
139 | * value of max_sectors. We should use sbp2_workarounds_table[] to cover any | |
140 | * bridge chip which becomes known to need the 255 sectors limit. | |
1da177e4 | 141 | */ |
4e6343a1 | 142 | static int sbp2_max_sectors; |
ca0c7453 SR |
143 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); |
144 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " | |
4e6343a1 | 145 | "(default = 0 = use SCSI stack's default)"); |
1da177e4 LT |
146 | |
147 | /* | |
148 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
149 | * do an exclusive login, as it's generally unsafe to have two hosts | |
150 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
151 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
152 | * and you're either running read-only filesystems or some sort of special | |
20f45781 BC |
153 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
154 | * File System, or Lustre, then set exclusive_login to zero. | |
155 | * | |
156 | * So far only bridges from Oxford Semiconductor are known to support | |
157 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
158 | * are possible on OXFW911 and newer Oxsemi bridges. | |
1da177e4 | 159 | */ |
ca0c7453 | 160 | static int sbp2_exclusive_login = 1; |
77bba7ae | 161 | module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644); |
ca0c7453 | 162 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
77bba7ae | 163 | "(default = Y, use N for concurrent initiators)"); |
1da177e4 LT |
164 | |
165 | /* | |
24d3bf88 SR |
166 | * If any of the following workarounds is required for your device to work, |
167 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
168 | * mailing list. | |
1da177e4 | 169 | * |
24d3bf88 SR |
170 | * - 128kB max transfer |
171 | * Limit transfer size. Necessary for some old bridges. | |
172 | * | |
173 | * - 36 byte inquiry | |
174 | * When scsi_mod probes the device, let the inquiry command look like that | |
175 | * from MS Windows. | |
176 | * | |
177 | * - skip mode page 8 | |
178 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
179 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
e9a1c52c SR |
180 | * |
181 | * - fix capacity | |
182 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
183 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
184 | * Don't use this with devices which don't have this bug. | |
679c0cd2 | 185 | * |
d94a9835 SR |
186 | * - delay inquiry |
187 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
188 | * | |
3719122a SR |
189 | * - power condition |
190 | * Set the power condition field in the START STOP UNIT commands sent by | |
191 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). | |
192 | * Some disks need this to spin down or to resume properly. | |
193 | * | |
679c0cd2 SR |
194 | * - override internal blacklist |
195 | * Instead of adding to the built-in blacklist, use only the workarounds | |
196 | * specified in the module load parameter. | |
197 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 198 | */ |
24d3bf88 SR |
199 | static int sbp2_default_workarounds; |
200 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
201 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
202 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
203 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
204 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 205 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
d94a9835 | 206 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
3719122a SR |
207 | ", set power condition in start stop unit = " |
208 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) | |
679c0cd2 | 209 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
210 | ", or a combination)"); |
211 | ||
d7794c86 SR |
212 | /* |
213 | * This influences the format of the sysfs attribute | |
214 | * /sys/bus/scsi/devices/.../ieee1394_id. | |
215 | * | |
216 | * The default format is like in older kernels: %016Lx:%d:%d | |
217 | * It contains the target's EUI-64, a number given to the logical unit by | |
218 | * the ieee1394 driver's nodemgr (starting at 0), and the LUN. | |
219 | * | |
220 | * The long format is: %016Lx:%06x:%04x | |
221 | * It contains the target's EUI-64, the unit directory's directory_ID as per | |
222 | * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the | |
223 | * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI | |
224 | * Architecture Model) rev.2 to 4 annex A. Therefore and because it is | |
225 | * independent of the implementation of the ieee1394 nodemgr, the longer format | |
226 | * is recommended for future use. | |
227 | */ | |
228 | static int sbp2_long_sysfs_ieee1394_id; | |
229 | module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); | |
230 | MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " | |
231 | "(default = backwards-compatible = N, SAM-conforming = Y)"); | |
232 | ||
1da177e4 | 233 | |
edf1fb21 SR |
234 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
235 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
1da177e4 | 236 | |
1da177e4 LT |
237 | /* |
238 | * Globals | |
239 | */ | |
138c8af8 SR |
240 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
241 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, | |
ea42ea0f | 242 | void (*)(struct scsi_cmnd *)); |
138c8af8 SR |
243 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
244 | static int sbp2_start_device(struct sbp2_lu *); | |
245 | static void sbp2_remove_device(struct sbp2_lu *); | |
246 | static int sbp2_login_device(struct sbp2_lu *); | |
247 | static int sbp2_reconnect_device(struct sbp2_lu *); | |
248 | static int sbp2_logout_device(struct sbp2_lu *); | |
ea42ea0f SR |
249 | static void sbp2_host_reset(struct hpsb_host *); |
250 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, | |
251 | u64, size_t, u16); | |
138c8af8 SR |
252 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
253 | static void sbp2_parse_unit_directory(struct sbp2_lu *, | |
ea42ea0f | 254 | struct unit_directory *); |
138c8af8 SR |
255 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
256 | static int sbp2_max_speed_and_size(struct sbp2_lu *); | |
1da177e4 | 257 | |
1da177e4 LT |
258 | |
259 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
260 | ||
261b5f66 SR |
261 | static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); |
262 | ||
1da177e4 | 263 | static struct hpsb_highlevel sbp2_highlevel = { |
ea42ea0f SR |
264 | .name = SBP2_DEVICE_NAME, |
265 | .host_reset = sbp2_host_reset, | |
1da177e4 LT |
266 | }; |
267 | ||
268 | static struct hpsb_address_ops sbp2_ops = { | |
ea42ea0f | 269 | .write = sbp2_handle_status_write |
1da177e4 LT |
270 | }; |
271 | ||
272 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
ea42ea0f SR |
273 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
274 | u64, size_t, u16); | |
275 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, | |
276 | size_t, u16); | |
277 | ||
1da177e4 | 278 | static struct hpsb_address_ops sbp2_physdma_ops = { |
ea42ea0f SR |
279 | .read = sbp2_handle_physdma_read, |
280 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
281 | }; |
282 | #endif | |
283 | ||
ea42ea0f SR |
284 | |
285 | /* | |
286 | * Interface to driver core and IEEE 1394 core | |
287 | */ | |
288 | static struct ieee1394_device_id sbp2_id_table[] = { | |
289 | { | |
290 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, | |
291 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
292 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
293 | {} | |
294 | }; | |
295 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
296 | ||
297 | static int sbp2_probe(struct device *); | |
298 | static int sbp2_remove(struct device *); | |
299 | static int sbp2_update(struct unit_directory *); | |
300 | ||
1da177e4 | 301 | static struct hpsb_protocol_driver sbp2_driver = { |
ed30c26e | 302 | .name = SBP2_DEVICE_NAME, |
1da177e4 LT |
303 | .id_table = sbp2_id_table, |
304 | .update = sbp2_update, | |
305 | .driver = { | |
1da177e4 LT |
306 | .probe = sbp2_probe, |
307 | .remove = sbp2_remove, | |
308 | }, | |
309 | }; | |
310 | ||
ea42ea0f SR |
311 | |
312 | /* | |
313 | * Interface to SCSI core | |
314 | */ | |
315 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, | |
316 | void (*)(struct scsi_cmnd *)); | |
317 | static int sbp2scsi_abort(struct scsi_cmnd *); | |
318 | static int sbp2scsi_reset(struct scsi_cmnd *); | |
319 | static int sbp2scsi_slave_alloc(struct scsi_device *); | |
320 | static int sbp2scsi_slave_configure(struct scsi_device *); | |
321 | static void sbp2scsi_slave_destroy(struct scsi_device *); | |
322 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, | |
323 | struct device_attribute *, char *); | |
324 | ||
325 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
326 | ||
327 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
328 | &dev_attr_ieee1394_id, | |
329 | NULL | |
330 | }; | |
331 | ||
ca0c7453 | 332 | static struct scsi_host_template sbp2_shost_template = { |
ea42ea0f SR |
333 | .module = THIS_MODULE, |
334 | .name = "SBP-2 IEEE-1394", | |
335 | .proc_name = SBP2_DEVICE_NAME, | |
336 | .queuecommand = sbp2scsi_queuecommand, | |
337 | .eh_abort_handler = sbp2scsi_abort, | |
338 | .eh_device_reset_handler = sbp2scsi_reset, | |
339 | .slave_alloc = sbp2scsi_slave_alloc, | |
340 | .slave_configure = sbp2scsi_slave_configure, | |
341 | .slave_destroy = sbp2scsi_slave_destroy, | |
342 | .this_id = -1, | |
343 | .sg_tablesize = SG_ALL, | |
344 | .use_clustering = ENABLE_CLUSTERING, | |
345 | .cmd_per_lun = SBP2_MAX_CMDS, | |
346 | .can_queue = SBP2_MAX_CMDS, | |
ea42ea0f SR |
347 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
348 | }; | |
349 | ||
4618fd30 SR |
350 | /* for match-all entries in sbp2_workarounds_table */ |
351 | #define SBP2_ROM_VALUE_WILDCARD 0x1000000 | |
ea42ea0f | 352 | |
a80614d1 | 353 | /* |
24d3bf88 SR |
354 | * List of devices with known bugs. |
355 | * | |
356 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
357 | * for the type of bridge chip of a device. It yields a few false positives | |
358 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 359 | */ |
24d3bf88 SR |
360 | static const struct { |
361 | u32 firmware_revision; | |
e9a1c52c | 362 | u32 model_id; |
24d3bf88 SR |
363 | unsigned workarounds; |
364 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 365 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 366 | .firmware_revision = 0x002800, |
4b9a3347 | 367 | .model_id = 0x001010, |
24d3bf88 | 368 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
3719122a SR |
369 | SBP2_WORKAROUND_MODE_SENSE_8 | |
370 | SBP2_WORKAROUND_POWER_CONDITION, | |
24d3bf88 | 371 | }, |
d94a9835 SR |
372 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
373 | .firmware_revision = 0x002800, | |
374 | .model_id = 0x000000, | |
3719122a SR |
375 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY | |
376 | SBP2_WORKAROUND_POWER_CONDITION, | |
d94a9835 | 377 | }, |
24d3bf88 SR |
378 | /* Initio bridges, actually only needed for some older ones */ { |
379 | .firmware_revision = 0x000200, | |
4618fd30 | 380 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 SR |
381 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
382 | }, | |
3719122a SR |
383 | /* PL-3507 bridge with Prolific firmware */ { |
384 | .firmware_revision = 0x012800, | |
385 | .model_id = SBP2_ROM_VALUE_WILDCARD, | |
386 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, | |
387 | }, | |
24d3bf88 SR |
388 | /* Symbios bridge */ { |
389 | .firmware_revision = 0xa0b800, | |
4618fd30 | 390 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
24d3bf88 | 391 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
e9a1c52c | 392 | }, |
6e45ef4c SR |
393 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
394 | .firmware_revision = 0x002600, | |
395 | .model_id = SBP2_ROM_VALUE_WILDCARD, | |
396 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
397 | }, | |
e9a1c52c SR |
398 | /* iPod 4th generation */ { |
399 | .firmware_revision = 0x0a2700, | |
400 | .model_id = 0x000021, | |
401 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
402 | }, | |
403 | /* iPod mini */ { | |
404 | .firmware_revision = 0x0a2700, | |
405 | .model_id = 0x000023, | |
406 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
407 | }, | |
408 | /* iPod Photo */ { | |
409 | .firmware_revision = 0x0a2700, | |
410 | .model_id = 0x00007e, | |
411 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 412 | } |
1da177e4 LT |
413 | }; |
414 | ||
1da177e4 LT |
415 | /************************************** |
416 | * General utility functions | |
417 | **************************************/ | |
418 | ||
1da177e4 LT |
419 | #ifndef __BIG_ENDIAN |
420 | /* | |
421 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
422 | */ | |
2b01b80b | 423 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
424 | { |
425 | u32 *temp = buffer; | |
426 | ||
427 | for (length = (length >> 2); length--; ) | |
428 | temp[length] = be32_to_cpu(temp[length]); | |
1da177e4 LT |
429 | } |
430 | ||
431 | /* | |
432 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
433 | */ | |
2b01b80b | 434 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
435 | { |
436 | u32 *temp = buffer; | |
437 | ||
438 | for (length = (length >> 2); length--; ) | |
439 | temp[length] = cpu_to_be32(temp[length]); | |
1da177e4 LT |
440 | } |
441 | #else /* BIG_ENDIAN */ | |
442 | /* Why waste the cpu cycles? */ | |
611aa19f SR |
443 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
444 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
445 | #endif |
446 | ||
ca0c7453 | 447 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
e8398bb7 | 448 | |
1da177e4 | 449 | /* |
e8398bb7 SR |
450 | * Waits for completion of an SBP-2 access request. |
451 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 452 | */ |
138c8af8 | 453 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
1da177e4 | 454 | { |
ca0c7453 | 455 | long leftover; |
1da177e4 | 456 | |
ca0c7453 | 457 | leftover = wait_event_interruptible_timeout( |
138c8af8 SR |
458 | sbp2_access_wq, lu->access_complete, timeout); |
459 | lu->access_complete = 0; | |
e8398bb7 | 460 | return leftover <= 0; |
1da177e4 LT |
461 | } |
462 | ||
138c8af8 | 463 | static void sbp2_free_packet(void *packet) |
1da177e4 LT |
464 | { |
465 | hpsb_free_tlabel(packet); | |
466 | hpsb_free_packet(packet); | |
467 | } | |
468 | ||
e8ca5668 SR |
469 | /* |
470 | * This is much like hpsb_node_write(), except it ignores the response | |
471 | * subaction and returns immediately. Can be used from atomic context. | |
1da177e4 LT |
472 | */ |
473 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
138c8af8 | 474 | quadlet_t *buf, size_t len) |
1da177e4 LT |
475 | { |
476 | struct hpsb_packet *packet; | |
477 | ||
138c8af8 | 478 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
a237f35f SR |
479 | if (!packet) |
480 | return -ENOMEM; | |
1da177e4 | 481 | |
138c8af8 | 482 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
1da177e4 | 483 | hpsb_node_fill_packet(ne, packet); |
a237f35f | 484 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
485 | sbp2_free_packet(packet); |
486 | return -EIO; | |
487 | } | |
1da177e4 LT |
488 | return 0; |
489 | } | |
490 | ||
138c8af8 SR |
491 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
492 | quadlet_t *data, size_t len) | |
09ee67ab | 493 | { |
138c8af8 SR |
494 | /* There is a small window after a bus reset within which the node |
495 | * entry's generation is current but the reconnect wasn't completed. */ | |
496 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) | |
09ee67ab SR |
497 | return; |
498 | ||
138c8af8 | 499 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
09ee67ab SR |
500 | data, len)) |
501 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
138c8af8 SR |
502 | |
503 | /* Now accept new SCSI commands, unless a bus reset happended during | |
504 | * hpsb_node_write. */ | |
505 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) | |
506 | scsi_unblock_requests(lu->shost); | |
09ee67ab SR |
507 | } |
508 | ||
c4028958 | 509 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
09ee67ab | 510 | { |
ec9b7e10 | 511 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
09ee67ab SR |
512 | quadlet_t data[2]; |
513 | ||
ec9b7e10 SR |
514 | data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); |
515 | data[1] = lu->last_orb_dma; | |
09ee67ab | 516 | sbp2util_cpu_to_be32_buffer(data, 8); |
ec9b7e10 | 517 | sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); |
09ee67ab SR |
518 | } |
519 | ||
c4028958 | 520 | static void sbp2util_write_doorbell(struct work_struct *work) |
09ee67ab | 521 | { |
ec9b7e10 SR |
522 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
523 | ||
524 | sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); | |
09ee67ab SR |
525 | } |
526 | ||
138c8af8 | 527 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
1da177e4 | 528 | { |
138c8af8 | 529 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 530 | struct sbp2_command_info *cmd; |
3d269cb5 | 531 | int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
1da177e4 | 532 | |
1da177e4 | 533 | for (i = 0; i < orbs; i++) { |
3d269cb5 SR |
534 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
535 | if (!cmd) | |
a237f35f | 536 | return -ENOMEM; |
97d552e3 | 537 | cmd->command_orb_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
538 | &cmd->command_orb, |
539 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 540 | DMA_TO_DEVICE); |
97d552e3 | 541 | cmd->sge_dma = dma_map_single(hi->host->device.parent, |
138c8af8 SR |
542 | &cmd->scatter_gather_element, |
543 | sizeof(cmd->scatter_gather_element), | |
2446a79f | 544 | DMA_TO_DEVICE); |
138c8af8 SR |
545 | INIT_LIST_HEAD(&cmd->list); |
546 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); | |
1da177e4 | 547 | } |
1da177e4 LT |
548 | return 0; |
549 | } | |
550 | ||
a2ee3f9b SR |
551 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, |
552 | struct hpsb_host *host) | |
1da177e4 | 553 | { |
1da177e4 | 554 | struct list_head *lh, *next; |
138c8af8 | 555 | struct sbp2_command_info *cmd; |
1da177e4 LT |
556 | unsigned long flags; |
557 | ||
138c8af8 SR |
558 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
559 | if (!list_empty(&lu->cmd_orb_completed)) | |
560 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { | |
561 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
562 | dma_unmap_single(host->device.parent, |
563 | cmd->command_orb_dma, | |
1da177e4 | 564 | sizeof(struct sbp2_command_orb), |
9b7d9c09 | 565 | DMA_TO_DEVICE); |
97d552e3 | 566 | dma_unmap_single(host->device.parent, cmd->sge_dma, |
138c8af8 | 567 | sizeof(cmd->scatter_gather_element), |
2446a79f | 568 | DMA_TO_DEVICE); |
138c8af8 | 569 | kfree(cmd); |
1da177e4 | 570 | } |
138c8af8 | 571 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
572 | return; |
573 | } | |
574 | ||
575 | /* | |
e8ca5668 SR |
576 | * Finds the sbp2_command for a given outstanding command ORB. |
577 | * Only looks at the in-use list. | |
1da177e4 LT |
578 | */ |
579 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
138c8af8 | 580 | struct sbp2_lu *lu, dma_addr_t orb) |
1da177e4 | 581 | { |
138c8af8 | 582 | struct sbp2_command_info *cmd; |
1da177e4 LT |
583 | unsigned long flags; |
584 | ||
138c8af8 SR |
585 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
586 | if (!list_empty(&lu->cmd_orb_inuse)) | |
587 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
588 | if (cmd->command_orb_dma == orb) { | |
589 | spin_unlock_irqrestore( | |
590 | &lu->cmd_orb_lock, flags); | |
591 | return cmd; | |
1da177e4 | 592 | } |
138c8af8 | 593 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
a237f35f | 594 | return NULL; |
1da177e4 LT |
595 | } |
596 | ||
597 | /* | |
e8ca5668 SR |
598 | * Finds the sbp2_command for a given outstanding SCpnt. |
599 | * Only looks at the in-use list. | |
138c8af8 | 600 | * Must be called with lu->cmd_orb_lock held. |
1da177e4 | 601 | */ |
24c7cd06 | 602 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
138c8af8 | 603 | struct sbp2_lu *lu, void *SCpnt) |
1da177e4 | 604 | { |
138c8af8 | 605 | struct sbp2_command_info *cmd; |
1da177e4 | 606 | |
138c8af8 SR |
607 | if (!list_empty(&lu->cmd_orb_inuse)) |
608 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) | |
609 | if (cmd->Current_SCpnt == SCpnt) | |
610 | return cmd; | |
a237f35f | 611 | return NULL; |
1da177e4 LT |
612 | } |
613 | ||
1da177e4 | 614 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
138c8af8 SR |
615 | struct sbp2_lu *lu, |
616 | struct scsi_cmnd *Current_SCpnt, | |
617 | void (*Current_done)(struct scsi_cmnd *)) | |
1da177e4 LT |
618 | { |
619 | struct list_head *lh; | |
138c8af8 | 620 | struct sbp2_command_info *cmd = NULL; |
1da177e4 LT |
621 | unsigned long flags; |
622 | ||
138c8af8 SR |
623 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
624 | if (!list_empty(&lu->cmd_orb_completed)) { | |
625 | lh = lu->cmd_orb_completed.next; | |
1da177e4 | 626 | list_del(lh); |
138c8af8 SR |
627 | cmd = list_entry(lh, struct sbp2_command_info, list); |
628 | cmd->Current_done = Current_done; | |
629 | cmd->Current_SCpnt = Current_SCpnt; | |
630 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); | |
631 | } else | |
b1ce1fd7 | 632 | SBP2_ERR("%s: no orbs available", __func__); |
138c8af8 SR |
633 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
634 | return cmd; | |
1da177e4 LT |
635 | } |
636 | ||
58272c1c SR |
637 | /* |
638 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. | |
639 | * Must be called with lu->cmd_orb_lock held. | |
640 | */ | |
641 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, | |
642 | struct sbp2_command_info *cmd) | |
1da177e4 | 643 | { |
58272c1c | 644 | struct hpsb_host *host = lu->ud->ne->host; |
1da177e4 | 645 | |
138c8af8 SR |
646 | if (cmd->cmd_dma) { |
647 | if (cmd->dma_type == CMD_DMA_SINGLE) | |
97d552e3 | 648 | dma_unmap_single(host->device.parent, cmd->cmd_dma, |
138c8af8 SR |
649 | cmd->dma_size, cmd->dma_dir); |
650 | else if (cmd->dma_type == CMD_DMA_PAGE) | |
97d552e3 | 651 | dma_unmap_page(host->device.parent, cmd->cmd_dma, |
138c8af8 | 652 | cmd->dma_size, cmd->dma_dir); |
edf1fb21 | 653 | /* XXX: Check for CMD_DMA_NONE bug */ |
138c8af8 SR |
654 | cmd->dma_type = CMD_DMA_NONE; |
655 | cmd->cmd_dma = 0; | |
1da177e4 | 656 | } |
138c8af8 | 657 | if (cmd->sge_buffer) { |
97d552e3 | 658 | dma_unmap_sg(host->device.parent, cmd->sge_buffer, |
138c8af8 SR |
659 | cmd->dma_size, cmd->dma_dir); |
660 | cmd->sge_buffer = NULL; | |
1da177e4 | 661 | } |
cd641f68 | 662 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
1da177e4 LT |
663 | } |
664 | ||
abd559b1 | 665 | /* |
138c8af8 | 666 | * Is lu valid? Is the 1394 node still present? |
abd559b1 | 667 | */ |
138c8af8 | 668 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
abd559b1 | 669 | { |
138c8af8 | 670 | return lu && lu->ne && !lu->ne->in_limbo; |
abd559b1 JM |
671 | } |
672 | ||
1da177e4 LT |
673 | /********************************************* |
674 | * IEEE-1394 core driver stack related section | |
675 | *********************************************/ | |
1da177e4 LT |
676 | |
677 | static int sbp2_probe(struct device *dev) | |
678 | { | |
679 | struct unit_directory *ud; | |
138c8af8 | 680 | struct sbp2_lu *lu; |
1da177e4 | 681 | |
1da177e4 LT |
682 | ud = container_of(dev, struct unit_directory, device); |
683 | ||
684 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
685 | * instead. */ | |
686 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
687 | return -ENODEV; | |
688 | ||
138c8af8 SR |
689 | lu = sbp2_alloc_device(ud); |
690 | if (!lu) | |
a237f35f | 691 | return -ENOMEM; |
1da177e4 | 692 | |
138c8af8 SR |
693 | sbp2_parse_unit_directory(lu, ud); |
694 | return sbp2_start_device(lu); | |
1da177e4 LT |
695 | } |
696 | ||
697 | static int sbp2_remove(struct device *dev) | |
698 | { | |
699 | struct unit_directory *ud; | |
138c8af8 | 700 | struct sbp2_lu *lu; |
abd559b1 | 701 | struct scsi_device *sdev; |
1da177e4 | 702 | |
1da177e4 | 703 | ud = container_of(dev, struct unit_directory, device); |
138c8af8 SR |
704 | lu = ud->device.driver_data; |
705 | if (!lu) | |
abd559b1 JM |
706 | return 0; |
707 | ||
138c8af8 | 708 | if (lu->shost) { |
bf637ec3 SR |
709 | /* Get rid of enqueued commands if there is no chance to |
710 | * send them. */ | |
138c8af8 SR |
711 | if (!sbp2util_node_is_available(lu)) |
712 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); | |
e8ca5668 | 713 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
bf637ec3 | 714 | * highlevel drivers which would deadlock if blocked. */ |
138c8af8 SR |
715 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
716 | scsi_unblock_requests(lu->shost); | |
bf637ec3 | 717 | } |
138c8af8 | 718 | sdev = lu->sdev; |
abd559b1 | 719 | if (sdev) { |
138c8af8 | 720 | lu->sdev = NULL; |
abd559b1 JM |
721 | scsi_remove_device(sdev); |
722 | } | |
1da177e4 | 723 | |
138c8af8 SR |
724 | sbp2_logout_device(lu); |
725 | sbp2_remove_device(lu); | |
1da177e4 LT |
726 | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int sbp2_update(struct unit_directory *ud) | |
731 | { | |
138c8af8 | 732 | struct sbp2_lu *lu = ud->device.driver_data; |
1da177e4 | 733 | |
138c8af8 | 734 | if (sbp2_reconnect_device(lu)) { |
e8ca5668 SR |
735 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
736 | * enough. Try a regular login, but first log out just in | |
737 | * case of any weirdness. */ | |
138c8af8 | 738 | sbp2_logout_device(lu); |
1da177e4 | 739 | |
138c8af8 | 740 | if (sbp2_login_device(lu)) { |
1da177e4 LT |
741 | /* Login failed too, just fail, and the backend |
742 | * will call our sbp2_remove for us */ | |
743 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
744 | return -EBUSY; | |
745 | } | |
746 | } | |
747 | ||
138c8af8 SR |
748 | sbp2_set_busy_timeout(lu); |
749 | sbp2_agent_reset(lu, 1); | |
750 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 751 | |
e8ca5668 SR |
752 | /* Complete any pending commands with busy (so they get retried) |
753 | * and remove them from our queue. */ | |
138c8af8 | 754 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 | 755 | |
4fc383c0 SR |
756 | /* Accept new commands unless there was another bus reset in the |
757 | * meantime. */ | |
138c8af8 SR |
758 | if (hpsb_node_entry_valid(lu->ne)) { |
759 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
760 | scsi_unblock_requests(lu->shost); | |
4fc383c0 | 761 | } |
1da177e4 LT |
762 | return 0; |
763 | } | |
764 | ||
138c8af8 | 765 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
1da177e4 | 766 | { |
ca0c7453 | 767 | struct sbp2_fwhost_info *hi; |
138c8af8 SR |
768 | struct Scsi_Host *shost = NULL; |
769 | struct sbp2_lu *lu = NULL; | |
261b5f66 | 770 | unsigned long flags; |
1da177e4 | 771 | |
138c8af8 SR |
772 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
773 | if (!lu) { | |
774 | SBP2_ERR("failed to create lu"); | |
1da177e4 LT |
775 | goto failed_alloc; |
776 | } | |
1da177e4 | 777 | |
138c8af8 SR |
778 | lu->ne = ud->ne; |
779 | lu->ud = ud; | |
780 | lu->speed_code = IEEE1394_SPEED_100; | |
781 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
782 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; | |
783 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); | |
784 | INIT_LIST_HEAD(&lu->cmd_orb_completed); | |
785 | INIT_LIST_HEAD(&lu->lu_list); | |
786 | spin_lock_init(&lu->cmd_orb_lock); | |
787 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); | |
788 | INIT_WORK(&lu->protocol_work, NULL); | |
1da177e4 | 789 | |
138c8af8 | 790 | ud->device.driver_data = lu; |
1da177e4 LT |
791 | |
792 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
793 | if (!hi) { | |
138c8af8 SR |
794 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
795 | sizeof(*hi)); | |
1da177e4 LT |
796 | if (!hi) { |
797 | SBP2_ERR("failed to allocate hostinfo"); | |
798 | goto failed_alloc; | |
799 | } | |
1da177e4 | 800 | hi->host = ud->ne->host; |
138c8af8 | 801 | INIT_LIST_HEAD(&hi->logical_units); |
1da177e4 | 802 | |
1da177e4 LT |
803 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
804 | /* Handle data movement if physical dma is not | |
55664051 SR |
805 | * enabled or not supported on host controller */ |
806 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
807 | &sbp2_physdma_ops, | |
808 | 0x0ULL, 0xfffffffcULL)) { | |
809 | SBP2_ERR("failed to register lower 4GB address range"); | |
810 | goto failed_alloc; | |
811 | } | |
1da177e4 LT |
812 | #endif |
813 | } | |
814 | ||
147830f2 SR |
815 | /* Prevent unloading of the 1394 host */ |
816 | if (!try_module_get(hi->host->driver->owner)) { | |
817 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
818 | goto failed_alloc; | |
819 | } | |
820 | ||
138c8af8 | 821 | lu->hi = hi; |
1da177e4 | 822 | |
261b5f66 | 823 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 824 | list_add_tail(&lu->lu_list, &hi->logical_units); |
261b5f66 | 825 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 826 | |
35bdddb8 SR |
827 | /* Register the status FIFO address range. We could use the same FIFO |
828 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
829 | * target in order to support multi-unit devices. |
830 | * The FIFO is located out of the local host controller's physical range | |
831 | * but, if possible, within the posted write area. Status writes will | |
832 | * then be performed as unified transactions. This slightly reduces | |
833 | * bandwidth usage, and some Prolific based devices seem to require it. | |
834 | */ | |
138c8af8 | 835 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
35bdddb8 SR |
836 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
837 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 838 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
138c8af8 | 839 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
840 | SBP2_ERR("failed to allocate status FIFO address range"); |
841 | goto failed_alloc; | |
842 | } | |
843 | ||
138c8af8 SR |
844 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
845 | if (!shost) { | |
1da177e4 LT |
846 | SBP2_ERR("failed to register scsi host"); |
847 | goto failed_alloc; | |
848 | } | |
849 | ||
138c8af8 | 850 | shost->hostdata[0] = (unsigned long)lu; |
1da177e4 | 851 | |
138c8af8 SR |
852 | if (!scsi_add_host(shost, &ud->device)) { |
853 | lu->shost = shost; | |
854 | return lu; | |
1da177e4 LT |
855 | } |
856 | ||
857 | SBP2_ERR("failed to add scsi host"); | |
138c8af8 | 858 | scsi_host_put(shost); |
1da177e4 LT |
859 | |
860 | failed_alloc: | |
138c8af8 | 861 | sbp2_remove_device(lu); |
1da177e4 LT |
862 | return NULL; |
863 | } | |
864 | ||
1da177e4 LT |
865 | static void sbp2_host_reset(struct hpsb_host *host) |
866 | { | |
ca0c7453 | 867 | struct sbp2_fwhost_info *hi; |
138c8af8 | 868 | struct sbp2_lu *lu; |
261b5f66 | 869 | unsigned long flags; |
1da177e4 LT |
870 | |
871 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
872 | if (!hi) |
873 | return; | |
261b5f66 SR |
874 | |
875 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); | |
138c8af8 SR |
876 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
877 | if (likely(atomic_read(&lu->state) != | |
2cccbb55 | 878 | SBP2LU_STATE_IN_SHUTDOWN)) { |
138c8af8 SR |
879 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
880 | scsi_block_requests(lu->shost); | |
09ee67ab | 881 | } |
261b5f66 | 882 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 LT |
883 | } |
884 | ||
138c8af8 | 885 | static int sbp2_start_device(struct sbp2_lu *lu) |
1da177e4 | 886 | { |
138c8af8 | 887 | struct sbp2_fwhost_info *hi = lu->hi; |
146f7262 | 888 | int error; |
1da177e4 | 889 | |
97d552e3 | 890 | lu->login_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 891 | sizeof(struct sbp2_login_response), |
9b7d9c09 | 892 | &lu->login_response_dma, GFP_KERNEL); |
138c8af8 | 893 | if (!lu->login_response) |
1da177e4 | 894 | goto alloc_fail; |
1da177e4 | 895 | |
97d552e3 | 896 | lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 897 | sizeof(struct sbp2_query_logins_orb), |
9b7d9c09 | 898 | &lu->query_logins_orb_dma, GFP_KERNEL); |
138c8af8 | 899 | if (!lu->query_logins_orb) |
1da177e4 | 900 | goto alloc_fail; |
1da177e4 | 901 | |
97d552e3 | 902 | lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 903 | sizeof(struct sbp2_query_logins_response), |
9b7d9c09 | 904 | &lu->query_logins_response_dma, GFP_KERNEL); |
138c8af8 | 905 | if (!lu->query_logins_response) |
1da177e4 | 906 | goto alloc_fail; |
1da177e4 | 907 | |
97d552e3 | 908 | lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 909 | sizeof(struct sbp2_reconnect_orb), |
9b7d9c09 | 910 | &lu->reconnect_orb_dma, GFP_KERNEL); |
138c8af8 | 911 | if (!lu->reconnect_orb) |
1da177e4 | 912 | goto alloc_fail; |
1da177e4 | 913 | |
97d552e3 | 914 | lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 915 | sizeof(struct sbp2_logout_orb), |
9b7d9c09 | 916 | &lu->logout_orb_dma, GFP_KERNEL); |
138c8af8 | 917 | if (!lu->logout_orb) |
1da177e4 | 918 | goto alloc_fail; |
1da177e4 | 919 | |
97d552e3 | 920 | lu->login_orb = dma_alloc_coherent(hi->host->device.parent, |
a237f35f | 921 | sizeof(struct sbp2_login_orb), |
9b7d9c09 | 922 | &lu->login_orb_dma, GFP_KERNEL); |
138c8af8 | 923 | if (!lu->login_orb) |
eaceec7f | 924 | goto alloc_fail; |
1da177e4 | 925 | |
3d269cb5 SR |
926 | if (sbp2util_create_command_orb_pool(lu)) |
927 | goto alloc_fail; | |
1da177e4 | 928 | |
e8ca5668 SR |
929 | /* Wait a second before trying to log in. Previously logged in |
930 | * initiators need a chance to reconnect. */ | |
902abed1 | 931 | if (msleep_interruptible(1000)) { |
138c8af8 | 932 | sbp2_remove_device(lu); |
1da177e4 LT |
933 | return -EINTR; |
934 | } | |
a237f35f | 935 | |
138c8af8 SR |
936 | if (sbp2_login_device(lu)) { |
937 | sbp2_remove_device(lu); | |
1da177e4 LT |
938 | return -EBUSY; |
939 | } | |
940 | ||
138c8af8 SR |
941 | sbp2_set_busy_timeout(lu); |
942 | sbp2_agent_reset(lu, 1); | |
943 | sbp2_max_speed_and_size(lu); | |
1da177e4 | 944 | |
d94a9835 SR |
945 | if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
946 | ssleep(SBP2_INQUIRY_DELAY); | |
947 | ||
138c8af8 | 948 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
146f7262 | 949 | if (error) { |
1da177e4 | 950 | SBP2_ERR("scsi_add_device failed"); |
138c8af8 SR |
951 | sbp2_logout_device(lu); |
952 | sbp2_remove_device(lu); | |
146f7262 | 953 | return error; |
1da177e4 LT |
954 | } |
955 | ||
956 | return 0; | |
eaceec7f SR |
957 | |
958 | alloc_fail: | |
138c8af8 SR |
959 | SBP2_ERR("Could not allocate memory for lu"); |
960 | sbp2_remove_device(lu); | |
eaceec7f | 961 | return -ENOMEM; |
1da177e4 LT |
962 | } |
963 | ||
138c8af8 | 964 | static void sbp2_remove_device(struct sbp2_lu *lu) |
1da177e4 | 965 | { |
ca0c7453 | 966 | struct sbp2_fwhost_info *hi; |
261b5f66 | 967 | unsigned long flags; |
1da177e4 | 968 | |
138c8af8 | 969 | if (!lu) |
1da177e4 | 970 | return; |
138c8af8 | 971 | hi = lu->hi; |
a2ee3f9b SR |
972 | if (!hi) |
973 | goto no_hi; | |
1da177e4 | 974 | |
138c8af8 SR |
975 | if (lu->shost) { |
976 | scsi_remove_host(lu->shost); | |
977 | scsi_host_put(lu->shost); | |
1da177e4 | 978 | } |
09ee67ab | 979 | flush_scheduled_work(); |
a2ee3f9b | 980 | sbp2util_remove_command_orb_pool(lu, hi->host); |
1da177e4 | 981 | |
261b5f66 | 982 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 | 983 | list_del(&lu->lu_list); |
261b5f66 | 984 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1da177e4 | 985 | |
138c8af8 | 986 | if (lu->login_response) |
97d552e3 | 987 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 988 | sizeof(struct sbp2_login_response), |
138c8af8 SR |
989 | lu->login_response, |
990 | lu->login_response_dma); | |
991 | if (lu->login_orb) | |
97d552e3 | 992 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 993 | sizeof(struct sbp2_login_orb), |
138c8af8 SR |
994 | lu->login_orb, |
995 | lu->login_orb_dma); | |
996 | if (lu->reconnect_orb) | |
97d552e3 | 997 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 998 | sizeof(struct sbp2_reconnect_orb), |
138c8af8 SR |
999 | lu->reconnect_orb, |
1000 | lu->reconnect_orb_dma); | |
1001 | if (lu->logout_orb) | |
97d552e3 | 1002 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 1003 | sizeof(struct sbp2_logout_orb), |
138c8af8 SR |
1004 | lu->logout_orb, |
1005 | lu->logout_orb_dma); | |
1006 | if (lu->query_logins_orb) | |
97d552e3 | 1007 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 1008 | sizeof(struct sbp2_query_logins_orb), |
138c8af8 SR |
1009 | lu->query_logins_orb, |
1010 | lu->query_logins_orb_dma); | |
1011 | if (lu->query_logins_response) | |
97d552e3 | 1012 | dma_free_coherent(hi->host->device.parent, |
1da177e4 | 1013 | sizeof(struct sbp2_query_logins_response), |
138c8af8 SR |
1014 | lu->query_logins_response, |
1015 | lu->query_logins_response_dma); | |
1da177e4 | 1016 | |
138c8af8 | 1017 | if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 1018 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
138c8af8 | 1019 | lu->status_fifo_addr); |
35bdddb8 | 1020 | |
138c8af8 | 1021 | lu->ud->device.driver_data = NULL; |
1da177e4 | 1022 | |
a2ee3f9b SR |
1023 | module_put(hi->host->driver->owner); |
1024 | no_hi: | |
138c8af8 | 1025 | kfree(lu); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1029 | /* | |
e8ca5668 SR |
1030 | * Deal with write requests on adapters which do not support physical DMA or |
1031 | * have it switched off. | |
1da177e4 | 1032 | */ |
a237f35f SR |
1033 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1034 | int destid, quadlet_t *data, u64 addr, | |
1035 | size_t length, u16 flags) | |
1da177e4 | 1036 | { |
a237f35f | 1037 | memcpy(bus_to_virt((u32) addr), data, length); |
a237f35f | 1038 | return RCODE_COMPLETE; |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | /* | |
e8ca5668 SR |
1042 | * Deal with read requests on adapters which do not support physical DMA or |
1043 | * have it switched off. | |
1da177e4 | 1044 | */ |
a237f35f SR |
1045 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1046 | quadlet_t *data, u64 addr, size_t length, | |
1047 | u16 flags) | |
1da177e4 | 1048 | { |
a237f35f | 1049 | memcpy(data, bus_to_virt((u32) addr), length); |
a237f35f | 1050 | return RCODE_COMPLETE; |
1da177e4 LT |
1051 | } |
1052 | #endif | |
1053 | ||
1da177e4 LT |
1054 | /************************************** |
1055 | * SBP-2 protocol related section | |
1056 | **************************************/ | |
1057 | ||
138c8af8 | 1058 | static int sbp2_query_logins(struct sbp2_lu *lu) |
1da177e4 | 1059 | { |
138c8af8 | 1060 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1061 | quadlet_t data[2]; |
1062 | int max_logins; | |
1063 | int active_logins; | |
1064 | ||
138c8af8 SR |
1065 | lu->query_logins_orb->reserved1 = 0x0; |
1066 | lu->query_logins_orb->reserved2 = 0x0; | |
1da177e4 | 1067 | |
138c8af8 SR |
1068 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
1069 | lu->query_logins_orb->query_response_hi = | |
1070 | ORB_SET_NODE_ID(hi->host->node_id); | |
1071 | lu->query_logins_orb->lun_misc = | |
1072 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1073 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1074 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1075 | |
138c8af8 SR |
1076 | lu->query_logins_orb->reserved_resp_length = |
1077 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( | |
1078 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1079 | |
138c8af8 SR |
1080 | lu->query_logins_orb->status_fifo_hi = |
1081 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1082 | lu->query_logins_orb->status_fifo_lo = | |
1083 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1084 | |
138c8af8 SR |
1085 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
1086 | sizeof(struct sbp2_query_logins_orb)); | |
1da177e4 | 1087 | |
138c8af8 SR |
1088 | memset(lu->query_logins_response, 0, |
1089 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1090 | |
1da177e4 | 1091 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1092 | data[1] = lu->query_logins_orb_dma; |
1da177e4 LT |
1093 | sbp2util_cpu_to_be32_buffer(data, 8); |
1094 | ||
138c8af8 | 1095 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1096 | |
138c8af8 | 1097 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
1da177e4 | 1098 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1099 | return -EIO; |
1da177e4 LT |
1100 | } |
1101 | ||
138c8af8 | 1102 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
1da177e4 | 1103 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1104 | return -EIO; |
1da177e4 LT |
1105 | } |
1106 | ||
138c8af8 | 1107 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1108 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
a237f35f | 1109 | return -EIO; |
1da177e4 LT |
1110 | } |
1111 | ||
138c8af8 SR |
1112 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
1113 | sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1114 | |
138c8af8 SR |
1115 | max_logins = RESPONSE_GET_MAX_LOGINS( |
1116 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1117 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 | 1118 | |
138c8af8 SR |
1119 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
1120 | lu->query_logins_response->length_max_logins); | |
20f45781 | 1121 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1122 | |
1123 | if (active_logins >= max_logins) { | |
a237f35f | 1124 | return -EIO; |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
138c8af8 | 1130 | static int sbp2_login_device(struct sbp2_lu *lu) |
1da177e4 | 1131 | { |
138c8af8 | 1132 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1133 | quadlet_t data[2]; |
1134 | ||
138c8af8 | 1135 | if (!lu->login_orb) |
a237f35f | 1136 | return -EIO; |
1da177e4 | 1137 | |
138c8af8 | 1138 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
ca0c7453 SR |
1139 | SBP2_INFO("Device does not support any more concurrent logins"); |
1140 | return -EIO; | |
1da177e4 LT |
1141 | } |
1142 | ||
e8ca5668 | 1143 | /* assume no password */ |
138c8af8 SR |
1144 | lu->login_orb->password_hi = 0; |
1145 | lu->login_orb->password_lo = 0; | |
1da177e4 | 1146 | |
138c8af8 SR |
1147 | lu->login_orb->login_response_lo = lu->login_response_dma; |
1148 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1149 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
e8ca5668 SR |
1150 | |
1151 | /* one second reconnect time */ | |
138c8af8 SR |
1152 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
1153 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); | |
1154 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1155 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); | |
1da177e4 | 1156 | |
138c8af8 | 1157 | lu->login_orb->passwd_resp_lengths = |
1da177e4 | 1158 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
1da177e4 | 1159 | |
138c8af8 SR |
1160 | lu->login_orb->status_fifo_hi = |
1161 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1162 | lu->login_orb->status_fifo_lo = | |
1163 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1164 | |
138c8af8 SR |
1165 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
1166 | sizeof(struct sbp2_login_orb)); | |
1da177e4 | 1167 | |
138c8af8 | 1168 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1169 | |
1da177e4 | 1170 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1171 | data[1] = lu->login_orb_dma; |
1da177e4 LT |
1172 | sbp2util_cpu_to_be32_buffer(data, 8); |
1173 | ||
138c8af8 | 1174 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 | 1175 | |
e8ca5668 | 1176 | /* wait up to 20 seconds for login status */ |
138c8af8 | 1177 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
e8398bb7 | 1178 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1179 | return -EIO; |
1da177e4 LT |
1180 | } |
1181 | ||
e8ca5668 | 1182 | /* make sure that the returned status matches the login ORB */ |
138c8af8 | 1183 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
6065772d | 1184 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1185 | return -EIO; |
1da177e4 LT |
1186 | } |
1187 | ||
138c8af8 | 1188 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1189 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
a237f35f | 1190 | return -EIO; |
1da177e4 LT |
1191 | } |
1192 | ||
138c8af8 SR |
1193 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
1194 | sizeof(struct sbp2_login_response)); | |
1195 | lu->command_block_agent_addr = | |
1196 | ((u64)lu->login_response->command_block_agent_hi) << 32; | |
1197 | lu->command_block_agent_addr |= | |
1198 | ((u64)lu->login_response->command_block_agent_lo); | |
1199 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1da177e4 LT |
1200 | |
1201 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1202 | return 0; |
1da177e4 LT |
1203 | } |
1204 | ||
138c8af8 | 1205 | static int sbp2_logout_device(struct sbp2_lu *lu) |
1da177e4 | 1206 | { |
138c8af8 | 1207 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1208 | quadlet_t data[2]; |
1209 | int error; | |
1210 | ||
138c8af8 SR |
1211 | lu->logout_orb->reserved1 = 0x0; |
1212 | lu->logout_orb->reserved2 = 0x0; | |
1213 | lu->logout_orb->reserved3 = 0x0; | |
1214 | lu->logout_orb->reserved4 = 0x0; | |
1da177e4 | 1215 | |
138c8af8 SR |
1216 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
1217 | lu->logout_orb->login_ID_misc |= | |
1218 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1219 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1220 | |
138c8af8 SR |
1221 | lu->logout_orb->reserved5 = 0x0; |
1222 | lu->logout_orb->status_fifo_hi = | |
1223 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1224 | lu->logout_orb->status_fifo_lo = | |
1225 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1226 | |
138c8af8 SR |
1227 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
1228 | sizeof(struct sbp2_logout_orb)); | |
1da177e4 | 1229 | |
1da177e4 | 1230 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1231 | data[1] = lu->logout_orb_dma; |
1da177e4 LT |
1232 | sbp2util_cpu_to_be32_buffer(data, 8); |
1233 | ||
138c8af8 | 1234 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1235 | if (error) |
1236 | return error; | |
1237 | ||
e8ca5668 | 1238 | /* wait up to 1 second for the device to complete logout */ |
138c8af8 | 1239 | if (sbp2util_access_timeout(lu, HZ)) |
1da177e4 LT |
1240 | return -EIO; |
1241 | ||
1242 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1243 | return 0; |
1da177e4 LT |
1244 | } |
1245 | ||
138c8af8 | 1246 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
1da177e4 | 1247 | { |
138c8af8 | 1248 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 LT |
1249 | quadlet_t data[2]; |
1250 | int error; | |
1251 | ||
138c8af8 SR |
1252 | lu->reconnect_orb->reserved1 = 0x0; |
1253 | lu->reconnect_orb->reserved2 = 0x0; | |
1254 | lu->reconnect_orb->reserved3 = 0x0; | |
1255 | lu->reconnect_orb->reserved4 = 0x0; | |
1da177e4 | 1256 | |
138c8af8 SR |
1257 | lu->reconnect_orb->login_ID_misc = |
1258 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1259 | lu->reconnect_orb->login_ID_misc |= | |
1260 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); | |
1261 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1262 | |
138c8af8 SR |
1263 | lu->reconnect_orb->reserved5 = 0x0; |
1264 | lu->reconnect_orb->status_fifo_hi = | |
1265 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); | |
1266 | lu->reconnect_orb->status_fifo_lo = | |
1267 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); | |
1da177e4 | 1268 | |
138c8af8 SR |
1269 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
1270 | sizeof(struct sbp2_reconnect_orb)); | |
1da177e4 | 1271 | |
1da177e4 | 1272 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1273 | data[1] = lu->reconnect_orb_dma; |
1da177e4 LT |
1274 | sbp2util_cpu_to_be32_buffer(data, 8); |
1275 | ||
138c8af8 | 1276 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
1da177e4 LT |
1277 | if (error) |
1278 | return error; | |
1279 | ||
e8ca5668 | 1280 | /* wait up to 1 second for reconnect status */ |
138c8af8 | 1281 | if (sbp2util_access_timeout(lu, HZ)) { |
e8398bb7 | 1282 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1283 | return -EIO; |
1da177e4 LT |
1284 | } |
1285 | ||
e8ca5668 | 1286 | /* make sure that the returned status matches the reconnect ORB */ |
138c8af8 | 1287 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
6065772d | 1288 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1289 | return -EIO; |
1da177e4 LT |
1290 | } |
1291 | ||
138c8af8 | 1292 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
6065772d | 1293 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
a237f35f | 1294 | return -EIO; |
1da177e4 LT |
1295 | } |
1296 | ||
35644090 | 1297 | SBP2_INFO("Reconnected to SBP-2 device"); |
a237f35f | 1298 | return 0; |
1da177e4 LT |
1299 | } |
1300 | ||
1301 | /* | |
e8ca5668 SR |
1302 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
1303 | * behaviour if our node is too busy to accept requests. | |
1da177e4 | 1304 | */ |
138c8af8 | 1305 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
1da177e4 LT |
1306 | { |
1307 | quadlet_t data; | |
1308 | ||
1da177e4 | 1309 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
138c8af8 | 1310 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
b1ce1fd7 | 1311 | SBP2_ERR("%s error", __func__); |
a237f35f | 1312 | return 0; |
1da177e4 LT |
1313 | } |
1314 | ||
138c8af8 | 1315 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
1da177e4 LT |
1316 | struct unit_directory *ud) |
1317 | { | |
1318 | struct csr1212_keyval *kv; | |
1319 | struct csr1212_dentry *dentry; | |
1320 | u64 management_agent_addr; | |
9117c6dc | 1321 | u32 unit_characteristics, firmware_revision; |
24d3bf88 | 1322 | unsigned workarounds; |
1da177e4 LT |
1323 | int i; |
1324 | ||
9117c6dc SR |
1325 | management_agent_addr = 0; |
1326 | unit_characteristics = 0; | |
1327 | firmware_revision = 0; | |
1da177e4 | 1328 | |
1da177e4 LT |
1329 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
1330 | switch (kv->key.id) { | |
1331 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
edf1fb21 | 1332 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
1da177e4 | 1333 | management_agent_addr = |
a237f35f SR |
1334 | CSR1212_REGISTER_SPACE_BASE + |
1335 | (kv->value.csr_offset << 2); | |
1da177e4 | 1336 | |
edf1fb21 | 1337 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
138c8af8 | 1338 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
1da177e4 LT |
1339 | break; |
1340 | ||
1da177e4 | 1341 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
e8ca5668 SR |
1342 | /* FIXME: This is ignored so far. |
1343 | * See SBP-2 clause 7.4.8. */ | |
1da177e4 | 1344 | unit_characteristics = kv->value.immediate; |
1da177e4 LT |
1345 | break; |
1346 | ||
1347 | case SBP2_FIRMWARE_REVISION_KEY: | |
1da177e4 | 1348 | firmware_revision = kv->value.immediate; |
1da177e4 LT |
1349 | break; |
1350 | ||
1351 | default: | |
e8ca5668 SR |
1352 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
1353 | * Its "ordered" bit has consequences for command ORB | |
1354 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ | |
1da177e4 LT |
1355 | break; |
1356 | } | |
1357 | } | |
1358 | ||
24d3bf88 | 1359 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1360 | |
679c0cd2 SR |
1361 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1362 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
4618fd30 SR |
1363 | if (sbp2_workarounds_table[i].firmware_revision != |
1364 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1365 | sbp2_workarounds_table[i].firmware_revision != |
1366 | (firmware_revision & 0xffff00)) | |
1367 | continue; | |
4618fd30 SR |
1368 | if (sbp2_workarounds_table[i].model_id != |
1369 | SBP2_ROM_VALUE_WILDCARD && | |
679c0cd2 SR |
1370 | sbp2_workarounds_table[i].model_id != ud->model_id) |
1371 | continue; | |
1372 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1373 | break; | |
1374 | } | |
1da177e4 | 1375 | |
24d3bf88 | 1376 | if (workarounds) |
e9a1c52c SR |
1377 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1378 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1379 | " model_id 0x%06x)", | |
24d3bf88 | 1380 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1381 | workarounds, firmware_revision, |
1382 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1383 | ud->model_id); | |
24d3bf88 SR |
1384 | |
1385 | /* We would need one SCSI host template for each target to adjust | |
1386 | * max_sectors on the fly, therefore warn only. */ | |
1387 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
ca0c7453 | 1388 | (sbp2_max_sectors * 512) > (128 * 1024)) |
35644090 | 1389 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
24d3bf88 SR |
1390 | "max transfer size. WARNING: Current max_sectors " |
1391 | "setting is larger than 128KB (%d sectors)", | |
1392 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
ca0c7453 | 1393 | sbp2_max_sectors); |
24d3bf88 | 1394 | |
1da177e4 LT |
1395 | /* If this is a logical unit directory entry, process the parent |
1396 | * to get the values. */ | |
1397 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
138c8af8 SR |
1398 | struct unit_directory *parent_ud = container_of( |
1399 | ud->device.parent, struct unit_directory, device); | |
1400 | sbp2_parse_unit_directory(lu, parent_ud); | |
1da177e4 | 1401 | } else { |
138c8af8 SR |
1402 | lu->management_agent_addr = management_agent_addr; |
1403 | lu->workarounds = workarounds; | |
1da177e4 | 1404 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
138c8af8 | 1405 | lu->lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1406 | } |
1407 | } | |
1408 | ||
fd23ade8 BC |
1409 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1410 | ||
1da177e4 LT |
1411 | /* |
1412 | * This function is called in order to determine the max speed and packet | |
1413 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1414 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1415 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1416 | * device decides the actual maximum data it can transfer. We just tell it | |
1417 | * the speed that it needs to use, and the max_rec the host supports, and | |
1418 | * it takes care of the rest. | |
1419 | */ | |
138c8af8 | 1420 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
1da177e4 | 1421 | { |
138c8af8 | 1422 | struct sbp2_fwhost_info *hi = lu->hi; |
fd23ade8 | 1423 | u8 payload; |
1da177e4 | 1424 | |
138c8af8 | 1425 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
1da177e4 | 1426 | |
138c8af8 SR |
1427 | if (lu->speed_code > sbp2_max_speed) { |
1428 | lu->speed_code = sbp2_max_speed; | |
ca0c7453 SR |
1429 | SBP2_INFO("Reducing speed to %s", |
1430 | hpsb_speedto_str[sbp2_max_speed]); | |
1da177e4 LT |
1431 | } |
1432 | ||
1433 | /* Payload size is the lesser of what our speed supports and what | |
1434 | * our host supports. */ | |
138c8af8 | 1435 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
fd23ade8 BC |
1436 | (u8) (hi->host->csr.max_rec - 1)); |
1437 | ||
1438 | /* If physical DMA is off, work around limitation in ohci1394: | |
1439 | * packet size must not exceed PAGE_SIZE */ | |
138c8af8 | 1440 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
fd23ade8 BC |
1441 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
1442 | payload) | |
1443 | payload--; | |
1da177e4 | 1444 | |
35644090 | 1445 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
138c8af8 SR |
1446 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
1447 | hpsb_speedto_str[lu->speed_code], | |
35644090 | 1448 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1449 | |
138c8af8 | 1450 | lu->max_payload_size = payload; |
a237f35f | 1451 | return 0; |
1da177e4 LT |
1452 | } |
1453 | ||
138c8af8 | 1454 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
1da177e4 LT |
1455 | { |
1456 | quadlet_t data; | |
1457 | u64 addr; | |
1458 | int retval; | |
cc078189 | 1459 | unsigned long flags; |
1da177e4 | 1460 | |
ec9b7e10 | 1461 | /* flush lu->protocol_work */ |
09ee67ab SR |
1462 | if (wait) |
1463 | flush_scheduled_work(); | |
1464 | ||
1da177e4 | 1465 | data = ntohl(SBP2_AGENT_RESET_DATA); |
138c8af8 | 1466 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
1da177e4 LT |
1467 | |
1468 | if (wait) | |
138c8af8 | 1469 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
1da177e4 | 1470 | else |
138c8af8 | 1471 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
1da177e4 LT |
1472 | |
1473 | if (retval < 0) { | |
1474 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1475 | return -EIO; | |
1476 | } | |
1477 | ||
e8ca5668 | 1478 | /* make sure that the ORB_POINTER is written on next command */ |
138c8af8 SR |
1479 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1480 | lu->last_orb = NULL; | |
1481 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1482 | |
a237f35f | 1483 | return 0; |
1da177e4 LT |
1484 | } |
1485 | ||
cf8d2c09 | 1486 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
ca0c7453 | 1487 | struct sbp2_fwhost_info *hi, |
138c8af8 | 1488 | struct sbp2_command_info *cmd, |
cf8d2c09 | 1489 | unsigned int scsi_use_sg, |
825f1df5 | 1490 | struct scatterlist *sg, |
cf8d2c09 SR |
1491 | u32 orb_direction, |
1492 | enum dma_data_direction dma_dir) | |
1493 | { | |
138c8af8 | 1494 | cmd->dma_dir = dma_dir; |
cf8d2c09 SR |
1495 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
1496 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1497 | ||
e8ca5668 | 1498 | /* special case if only one element (and less than 64KB in size) */ |
5fcf5000 | 1499 | if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
cf8d2c09 | 1500 | |
5fcf5000 | 1501 | cmd->dma_size = sg->length; |
138c8af8 | 1502 | cmd->dma_type = CMD_DMA_PAGE; |
97d552e3 | 1503 | cmd->cmd_dma = dma_map_page(hi->host->device.parent, |
825f1df5 | 1504 | sg_page(sg), sg->offset, |
138c8af8 | 1505 | cmd->dma_size, cmd->dma_dir); |
cf8d2c09 | 1506 | |
138c8af8 SR |
1507 | orb->data_descriptor_lo = cmd->cmd_dma; |
1508 | orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size); | |
cf8d2c09 SR |
1509 | |
1510 | } else { | |
1511 | struct sbp2_unrestricted_page_table *sg_element = | |
138c8af8 | 1512 | &cmd->scatter_gather_element[0]; |
cf8d2c09 SR |
1513 | u32 sg_count, sg_len; |
1514 | dma_addr_t sg_addr; | |
825f1df5 | 1515 | int i, count = dma_map_sg(hi->host->device.parent, sg, |
97d552e3 | 1516 | scsi_use_sg, dma_dir); |
cf8d2c09 | 1517 | |
138c8af8 | 1518 | cmd->dma_size = scsi_use_sg; |
825f1df5 | 1519 | cmd->sge_buffer = sg; |
cf8d2c09 SR |
1520 | |
1521 | /* use page tables (s/g) */ | |
1522 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
138c8af8 | 1523 | orb->data_descriptor_lo = cmd->sge_dma; |
cf8d2c09 | 1524 | |
e8ca5668 SR |
1525 | /* loop through and fill out our SBP-2 page tables |
1526 | * (and split up anything too large) */ | |
825f1df5 SR |
1527 | for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) { |
1528 | sg_len = sg_dma_len(sg); | |
1529 | sg_addr = sg_dma_address(sg); | |
cf8d2c09 SR |
1530 | while (sg_len) { |
1531 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1532 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1533 | sg_element[sg_count].length_segment_base_hi = | |
1534 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1535 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1536 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1537 | } else { | |
1538 | sg_element[sg_count].length_segment_base_hi = | |
1539 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1540 | sg_len = 0; | |
1541 | } | |
1542 | sg_count++; | |
1543 | } | |
1544 | } | |
1545 | ||
cf8d2c09 SR |
1546 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
1547 | ||
cf8d2c09 | 1548 | sbp2util_cpu_to_be32_buffer(sg_element, |
138c8af8 SR |
1549 | (sizeof(struct sbp2_unrestricted_page_table)) * |
1550 | sg_count); | |
cf8d2c09 SR |
1551 | } |
1552 | } | |
1553 | ||
138c8af8 SR |
1554 | static void sbp2_create_command_orb(struct sbp2_lu *lu, |
1555 | struct sbp2_command_info *cmd, | |
93c596f7 | 1556 | struct scsi_cmnd *SCpnt) |
1da177e4 | 1557 | { |
138c8af8 | 1558 | struct sbp2_fwhost_info *hi = lu->hi; |
138c8af8 | 1559 | struct sbp2_command_orb *orb = &cmd->command_orb; |
cf8d2c09 | 1560 | u32 orb_direction; |
93c596f7 SR |
1561 | unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt); |
1562 | enum dma_data_direction dma_dir = SCpnt->sc_data_direction; | |
1da177e4 LT |
1563 | |
1564 | /* | |
e8ca5668 | 1565 | * Set-up our command ORB. |
1da177e4 LT |
1566 | * |
1567 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1568 | * best performance (at least with the devices I have). This means | |
1569 | * that data_size becomes the number of s/g elements, and | |
1570 | * page_size should be zero (for unrestricted). | |
1571 | */ | |
138c8af8 SR |
1572 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
1573 | orb->next_ORB_lo = 0x0; | |
1574 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); | |
1575 | orb->misc |= ORB_SET_SPEED(lu->speed_code); | |
1576 | orb->misc |= ORB_SET_NOTIFY(1); | |
1da177e4 | 1577 | |
43863eba | 1578 | if (dma_dir == DMA_NONE) |
a237f35f | 1579 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1580 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1581 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1582 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1583 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba | 1584 | else { |
35644090 | 1585 | SBP2_INFO("Falling back to DMA_NONE"); |
43863eba | 1586 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
1da177e4 LT |
1587 | } |
1588 | ||
e8ca5668 | 1589 | /* set up our page table stuff */ |
1da177e4 | 1590 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
138c8af8 SR |
1591 | orb->data_descriptor_hi = 0x0; |
1592 | orb->data_descriptor_lo = 0x0; | |
1593 | orb->misc |= ORB_SET_DIRECTION(1); | |
d7dea2cf | 1594 | } else |
93c596f7 SR |
1595 | sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_sg_count(SCpnt), |
1596 | scsi_sglist(SCpnt), | |
138c8af8 | 1597 | orb_direction, dma_dir); |
1da177e4 | 1598 | |
138c8af8 | 1599 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
1da177e4 | 1600 | |
93c596f7 SR |
1601 | memset(orb->cdb, 0, sizeof(orb->cdb)); |
1602 | memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len); | |
1da177e4 LT |
1603 | } |
1604 | ||
138c8af8 SR |
1605 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
1606 | struct sbp2_command_info *cmd) | |
1da177e4 | 1607 | { |
138c8af8 | 1608 | struct sbp2_fwhost_info *hi = lu->hi; |
cc078189 SR |
1609 | struct sbp2_command_orb *last_orb; |
1610 | dma_addr_t last_orb_dma; | |
138c8af8 | 1611 | u64 addr = lu->command_block_agent_addr; |
cc078189 SR |
1612 | quadlet_t data[2]; |
1613 | size_t length; | |
1614 | unsigned long flags; | |
1da177e4 | 1615 | |
97d552e3 SR |
1616 | dma_sync_single_for_device(hi->host->device.parent, |
1617 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1618 | sizeof(struct sbp2_command_orb), |
1619 | DMA_TO_DEVICE); | |
97d552e3 | 1620 | dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1621 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1622 | DMA_TO_DEVICE); |
e8ca5668 SR |
1623 | |
1624 | /* check to see if there are any previous orbs to use */ | |
138c8af8 SR |
1625 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1626 | last_orb = lu->last_orb; | |
1627 | last_orb_dma = lu->last_orb_dma; | |
cc078189 | 1628 | if (!last_orb) { |
1da177e4 | 1629 | /* |
cc078189 SR |
1630 | * last_orb == NULL means: We know that the target's fetch agent |
1631 | * is not active right now. | |
1da177e4 | 1632 | */ |
cc078189 | 1633 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 | 1634 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
138c8af8 | 1635 | data[1] = cmd->command_orb_dma; |
1da177e4 | 1636 | sbp2util_cpu_to_be32_buffer(data, 8); |
cc078189 | 1637 | length = 8; |
1da177e4 | 1638 | } else { |
1da177e4 | 1639 | /* |
cc078189 SR |
1640 | * last_orb != NULL means: We know that the target's fetch agent |
1641 | * is (very probably) not dead or in reset state right now. | |
1642 | * We have an ORB already sent that we can append a new one to. | |
1643 | * The target's fetch agent may or may not have read this | |
1644 | * previous ORB yet. | |
1da177e4 | 1645 | */ |
97d552e3 | 1646 | dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, |
9b7d9c09 SR |
1647 | sizeof(struct sbp2_command_orb), |
1648 | DMA_TO_DEVICE); | |
138c8af8 | 1649 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
cc078189 | 1650 | wmb(); |
1da177e4 | 1651 | /* Tells hardware that this pointer is valid */ |
cc078189 | 1652 | last_orb->next_ORB_hi = 0; |
97d552e3 SR |
1653 | dma_sync_single_for_device(hi->host->device.parent, |
1654 | last_orb_dma, | |
9b7d9c09 SR |
1655 | sizeof(struct sbp2_command_orb), |
1656 | DMA_TO_DEVICE); | |
cc078189 SR |
1657 | addr += SBP2_DOORBELL_OFFSET; |
1658 | data[0] = 0; | |
1659 | length = 4; | |
1660 | } | |
138c8af8 SR |
1661 | lu->last_orb = &cmd->command_orb; |
1662 | lu->last_orb_dma = cmd->command_orb_dma; | |
1663 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 | 1664 | |
138c8af8 | 1665 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
09ee67ab SR |
1666 | /* |
1667 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
1668 | * of transaction labels, perhaps just because there were no | |
1669 | * context switches which gave khpsbpkt a chance to collect | |
1670 | * free tlabels. Try again in non-atomic context. If necessary, | |
1671 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
1672 | * We do not accept new commands until the job is over. | |
1673 | */ | |
138c8af8 SR |
1674 | scsi_block_requests(lu->shost); |
1675 | PREPARE_WORK(&lu->protocol_work, | |
09ee67ab | 1676 | last_orb ? sbp2util_write_doorbell: |
ec9b7e10 | 1677 | sbp2util_write_orb_pointer); |
138c8af8 | 1678 | schedule_work(&lu->protocol_work); |
09ee67ab | 1679 | } |
1da177e4 LT |
1680 | } |
1681 | ||
138c8af8 | 1682 | static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, |
1da177e4 LT |
1683 | void (*done)(struct scsi_cmnd *)) |
1684 | { | |
138c8af8 | 1685 | struct sbp2_command_info *cmd; |
1da177e4 | 1686 | |
138c8af8 SR |
1687 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
1688 | if (!cmd) | |
a237f35f | 1689 | return -EIO; |
1da177e4 | 1690 | |
93c596f7 | 1691 | sbp2_create_command_orb(lu, cmd, SCpnt); |
138c8af8 | 1692 | sbp2_link_orb_command(lu, cmd); |
1da177e4 | 1693 | |
a237f35f | 1694 | return 0; |
1da177e4 LT |
1695 | } |
1696 | ||
1da177e4 LT |
1697 | /* |
1698 | * Translates SBP-2 status into SCSI sense data for check conditions | |
1699 | */ | |
138c8af8 SR |
1700 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
1701 | unchar *sense_data) | |
1da177e4 | 1702 | { |
e8ca5668 | 1703 | /* OK, it's pretty ugly... ;-) */ |
1da177e4 LT |
1704 | sense_data[0] = 0x70; |
1705 | sense_data[1] = 0x0; | |
1706 | sense_data[2] = sbp2_status[9]; | |
1707 | sense_data[3] = sbp2_status[12]; | |
1708 | sense_data[4] = sbp2_status[13]; | |
1709 | sense_data[5] = sbp2_status[14]; | |
1710 | sense_data[6] = sbp2_status[15]; | |
1711 | sense_data[7] = 10; | |
1712 | sense_data[8] = sbp2_status[16]; | |
1713 | sense_data[9] = sbp2_status[17]; | |
1714 | sense_data[10] = sbp2_status[18]; | |
1715 | sense_data[11] = sbp2_status[19]; | |
1716 | sense_data[12] = sbp2_status[10]; | |
1717 | sense_data[13] = sbp2_status[11]; | |
1718 | sense_data[14] = sbp2_status[20]; | |
1719 | sense_data[15] = sbp2_status[21]; | |
1720 | ||
e8ca5668 | 1721 | return sbp2_status[8] & 0x3f; |
1da177e4 LT |
1722 | } |
1723 | ||
3e98eab4 SR |
1724 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
1725 | int destid, quadlet_t *data, u64 addr, | |
1726 | size_t length, u16 fl) | |
1da177e4 | 1727 | { |
ca0c7453 | 1728 | struct sbp2_fwhost_info *hi; |
138c8af8 | 1729 | struct sbp2_lu *lu = NULL, *lu_tmp; |
1da177e4 | 1730 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 1731 | struct sbp2_status_block *sb; |
1da177e4 | 1732 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
138c8af8 | 1733 | struct sbp2_command_info *cmd; |
79456197 | 1734 | unsigned long flags; |
1da177e4 | 1735 | |
6065772d SR |
1736 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
1737 | SBP2_ERR("Wrong size of status block"); | |
1738 | return RCODE_ADDRESS_ERROR; | |
1739 | } | |
1740 | if (unlikely(!host)) { | |
1da177e4 | 1741 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 1742 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1743 | } |
1da177e4 | 1744 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 1745 | if (unlikely(!hi)) { |
1da177e4 | 1746 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 1747 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 1748 | } |
e8ca5668 SR |
1749 | |
1750 | /* Find the unit which wrote the status. */ | |
261b5f66 | 1751 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
138c8af8 SR |
1752 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
1753 | if (lu_tmp->ne->nodeid == nodeid && | |
1754 | lu_tmp->status_fifo_addr == addr) { | |
1755 | lu = lu_tmp; | |
1da177e4 LT |
1756 | break; |
1757 | } | |
1758 | } | |
261b5f66 SR |
1759 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
1760 | ||
138c8af8 SR |
1761 | if (unlikely(!lu)) { |
1762 | SBP2_ERR("lu is NULL - device is gone?"); | |
a237f35f | 1763 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
1764 | } |
1765 | ||
138c8af8 | 1766 | /* Put response into lu status fifo buffer. The first two bytes |
3e98eab4 SR |
1767 | * come in big endian bit order. Often the target writes only a |
1768 | * truncated status block, minimally the first two quadlets. The rest | |
e8ca5668 | 1769 | * is implied to be zeros. */ |
138c8af8 | 1770 | sb = &lu->status_block; |
3e98eab4 SR |
1771 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
1772 | memcpy(sb, data, length); | |
1773 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 | 1774 | |
e8ca5668 | 1775 | /* Ignore unsolicited status. Handle command ORB status. */ |
6065772d | 1776 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
138c8af8 | 1777 | cmd = NULL; |
6065772d | 1778 | else |
138c8af8 SR |
1779 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
1780 | if (cmd) { | |
97d552e3 SR |
1781 | dma_sync_single_for_cpu(hi->host->device.parent, |
1782 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1783 | sizeof(struct sbp2_command_orb), |
1784 | DMA_TO_DEVICE); | |
97d552e3 | 1785 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1786 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1787 | DMA_TO_DEVICE); |
e8ca5668 | 1788 | /* Grab SCSI command pointers and check status. */ |
6065772d SR |
1789 | /* |
1790 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
1791 | * not be reused until status for a subsequent ORB is received. | |
1792 | */ | |
138c8af8 SR |
1793 | SCpnt = cmd->Current_SCpnt; |
1794 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); | |
1795 | sbp2util_mark_command_completed(lu, cmd); | |
1796 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1797 | |
1798 | if (SCpnt) { | |
abbca103 SR |
1799 | u32 h = sb->ORB_offset_hi_misc; |
1800 | u32 r = STATUS_GET_RESP(h); | |
1801 | ||
1802 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
35644090 | 1803 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
abbca103 | 1804 | r, STATUS_GET_SBP_STATUS(h)); |
6065772d | 1805 | scsi_status = |
abbca103 SR |
1806 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
1807 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 1808 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 1809 | } |
e8ca5668 | 1810 | |
edf1fb21 | 1811 | if (STATUS_GET_LEN(h) > 1) |
3e98eab4 SR |
1812 | scsi_status = sbp2_status_to_sense_data( |
1813 | (unchar *)sb, SCpnt->sense_buffer); | |
e8ca5668 | 1814 | |
edf1fb21 | 1815 | if (STATUS_TEST_DEAD(h)) |
138c8af8 | 1816 | sbp2_agent_reset(lu, 0); |
1da177e4 LT |
1817 | } |
1818 | ||
e8ca5668 | 1819 | /* Check here to see if there are no commands in-use. If there |
cc078189 SR |
1820 | * are none, we know that the fetch agent left the active state |
1821 | * _and_ that we did not reactivate it yet. Therefore clear | |
1822 | * last_orb so that next time we write directly to the | |
1823 | * ORB_POINTER register. That way the fetch agent does not need | |
e8ca5668 | 1824 | * to refetch the next_ORB. */ |
138c8af8 SR |
1825 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1826 | if (list_empty(&lu->cmd_orb_inuse)) | |
1827 | lu->last_orb = NULL; | |
1828 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); | |
1da177e4 LT |
1829 | |
1830 | } else { | |
e8ca5668 | 1831 | /* It's probably status after a management request. */ |
138c8af8 SR |
1832 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
1833 | (sb->ORB_offset_lo == lu->login_orb_dma) || | |
1834 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || | |
1835 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { | |
1836 | lu->access_complete = 1; | |
ca0c7453 | 1837 | wake_up_interruptible(&sbp2_access_wq); |
e8398bb7 | 1838 | } |
1da177e4 LT |
1839 | } |
1840 | ||
edf1fb21 | 1841 | if (SCpnt) |
138c8af8 SR |
1842 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
1843 | cmd->Current_done); | |
a237f35f | 1844 | return RCODE_COMPLETE; |
1da177e4 LT |
1845 | } |
1846 | ||
1da177e4 LT |
1847 | /************************************** |
1848 | * SCSI interface related section | |
1849 | **************************************/ | |
1850 | ||
1da177e4 LT |
1851 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
1852 | void (*done)(struct scsi_cmnd *)) | |
1853 | { | |
138c8af8 | 1854 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
ca0c7453 | 1855 | struct sbp2_fwhost_info *hi; |
abd559b1 | 1856 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 1857 | |
138c8af8 | 1858 | if (unlikely(!sbp2util_node_is_available(lu))) |
abd559b1 | 1859 | goto done; |
1da177e4 | 1860 | |
138c8af8 | 1861 | hi = lu->hi; |
1da177e4 | 1862 | |
5796aa7b | 1863 | if (unlikely(!hi)) { |
ca0c7453 | 1864 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
abd559b1 | 1865 | goto done; |
1da177e4 LT |
1866 | } |
1867 | ||
e8ca5668 SR |
1868 | /* Multiple units are currently represented to the SCSI core as separate |
1869 | * targets, not as one target with multiple LUs. Therefore return | |
1870 | * selection time-out to any IO directed at non-zero LUNs. */ | |
5796aa7b | 1871 | if (unlikely(SCpnt->device->lun)) |
abd559b1 | 1872 | goto done; |
1da177e4 | 1873 | |
138c8af8 | 1874 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
1da177e4 | 1875 | SBP2_ERR("Bus reset in progress - rejecting command"); |
abd559b1 JM |
1876 | result = DID_BUS_BUSY << 16; |
1877 | goto done; | |
1da177e4 LT |
1878 | } |
1879 | ||
e8ca5668 SR |
1880 | /* Bidirectional commands are not yet implemented, |
1881 | * and unknown transfer direction not handled. */ | |
5796aa7b | 1882 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
43863eba SR |
1883 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
1884 | result = DID_ERROR << 16; | |
1885 | goto done; | |
1886 | } | |
1887 | ||
138c8af8 | 1888 | if (sbp2_send_command(lu, SCpnt, done)) { |
1da177e4 | 1889 | SBP2_ERR("Error sending SCSI command"); |
138c8af8 SR |
1890 | sbp2scsi_complete_command(lu, |
1891 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
1da177e4 LT |
1892 | SCpnt, done); |
1893 | } | |
abd559b1 | 1894 | return 0; |
1da177e4 | 1895 | |
abd559b1 JM |
1896 | done: |
1897 | SCpnt->result = result; | |
1898 | done(SCpnt); | |
1899 | return 0; | |
1da177e4 LT |
1900 | } |
1901 | ||
138c8af8 | 1902 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
1da177e4 | 1903 | { |
138c8af8 | 1904 | struct sbp2_fwhost_info *hi = lu->hi; |
1da177e4 | 1905 | struct list_head *lh; |
138c8af8 | 1906 | struct sbp2_command_info *cmd; |
79456197 | 1907 | unsigned long flags; |
1da177e4 | 1908 | |
138c8af8 SR |
1909 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
1910 | while (!list_empty(&lu->cmd_orb_inuse)) { | |
1911 | lh = lu->cmd_orb_inuse.next; | |
1912 | cmd = list_entry(lh, struct sbp2_command_info, list); | |
97d552e3 SR |
1913 | dma_sync_single_for_cpu(hi->host->device.parent, |
1914 | cmd->command_orb_dma, | |
9b7d9c09 SR |
1915 | sizeof(struct sbp2_command_orb), |
1916 | DMA_TO_DEVICE); | |
97d552e3 | 1917 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
9b7d9c09 | 1918 | sizeof(cmd->scatter_gather_element), |
2446a79f | 1919 | DMA_TO_DEVICE); |
138c8af8 SR |
1920 | sbp2util_mark_command_completed(lu, cmd); |
1921 | if (cmd->Current_SCpnt) { | |
1922 | cmd->Current_SCpnt->result = status << 16; | |
1923 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
1924 | } |
1925 | } | |
138c8af8 | 1926 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 LT |
1927 | |
1928 | return; | |
1929 | } | |
1930 | ||
1931 | /* | |
e8ca5668 | 1932 | * Complete a regular SCSI command. Can be called in atomic context. |
1da177e4 | 1933 | */ |
138c8af8 SR |
1934 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
1935 | struct scsi_cmnd *SCpnt, | |
1da177e4 LT |
1936 | void (*done)(struct scsi_cmnd *)) |
1937 | { | |
1da177e4 LT |
1938 | if (!SCpnt) { |
1939 | SBP2_ERR("SCpnt is NULL"); | |
1940 | return; | |
1941 | } | |
1942 | ||
1da177e4 | 1943 | switch (scsi_status) { |
a237f35f | 1944 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 1945 | SCpnt->result = DID_OK << 16; |
a237f35f | 1946 | break; |
1da177e4 | 1947 | |
a237f35f SR |
1948 | case SBP2_SCSI_STATUS_BUSY: |
1949 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
1950 | SCpnt->result = DID_BUS_BUSY << 16; | |
1951 | break; | |
1da177e4 | 1952 | |
a237f35f | 1953 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
8f0525ff | 1954 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
a237f35f | 1955 | break; |
1da177e4 | 1956 | |
a237f35f SR |
1957 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
1958 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
1959 | SCpnt->result = DID_NO_CONNECT << 16; | |
1960 | scsi_print_command(SCpnt); | |
1961 | break; | |
1da177e4 | 1962 | |
a237f35f SR |
1963 | case SBP2_SCSI_STATUS_CONDITION_MET: |
1964 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
1965 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
1966 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
1967 | SCpnt->result = DID_ERROR << 16; | |
1968 | scsi_print_command(SCpnt); | |
1969 | break; | |
1da177e4 | 1970 | |
a237f35f SR |
1971 | default: |
1972 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
1973 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
1974 | } |
1975 | ||
e8ca5668 SR |
1976 | /* If a bus reset is in progress and there was an error, complete |
1977 | * the command as busy so that it will get retried. */ | |
138c8af8 | 1978 | if (!hpsb_node_entry_valid(lu->ne) |
a237f35f | 1979 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
1da177e4 LT |
1980 | SBP2_ERR("Completing command with busy (bus reset)"); |
1981 | SCpnt->result = DID_BUS_BUSY << 16; | |
1982 | } | |
1983 | ||
e8ca5668 | 1984 | /* Tell the SCSI stack that we're done with this command. */ |
a237f35f | 1985 | done(SCpnt); |
1da177e4 LT |
1986 | } |
1987 | ||
abd559b1 | 1988 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 1989 | { |
138c8af8 | 1990 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
a80614d1 | 1991 | |
ef774c16 SR |
1992 | if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0) |
1993 | return -ENODEV; | |
1994 | ||
138c8af8 | 1995 | lu->sdev = sdev; |
c394f1ea | 1996 | sdev->allow_restart = 1; |
a80614d1 | 1997 | |
a4b47d62 SR |
1998 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1999 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 2000 | |
138c8af8 | 2001 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2002 | sdev->inquiry_len = 36; |
abd559b1 JM |
2003 | return 0; |
2004 | } | |
2005 | ||
abd559b1 JM |
2006 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2007 | { | |
138c8af8 | 2008 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
24d3bf88 | 2009 | |
365c786f | 2010 | sdev->use_10_for_rw = 1; |
24d3bf88 | 2011 | |
82f06e86 SR |
2012 | if (sbp2_exclusive_login) |
2013 | sdev->manage_start_stop = 1; | |
1a74bc68 SR |
2014 | if (sdev->type == TYPE_ROM) |
2015 | sdev->use_10_for_ms = 1; | |
24d3bf88 | 2016 | if (sdev->type == TYPE_DISK && |
138c8af8 | 2017 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
24d3bf88 | 2018 | sdev->skip_ms_page_8 = 1; |
138c8af8 | 2019 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
e9a1c52c | 2020 | sdev->fix_capacity = 1; |
3719122a SR |
2021 | if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
2022 | sdev->start_stop_pwr_cond = 1; | |
4e6343a1 SR |
2023 | if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
2024 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); | |
1da177e4 LT |
2025 | return 0; |
2026 | } | |
2027 | ||
abd559b1 JM |
2028 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2029 | { | |
138c8af8 | 2030 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
abd559b1 JM |
2031 | return; |
2032 | } | |
2033 | ||
1da177e4 | 2034 | /* |
e8ca5668 SR |
2035 | * Called by scsi stack when something has really gone wrong. |
2036 | * Usually called when a command has timed-out for some reason. | |
1da177e4 LT |
2037 | */ |
2038 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2039 | { | |
138c8af8 SR |
2040 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
2041 | struct sbp2_fwhost_info *hi = lu->hi; | |
2042 | struct sbp2_command_info *cmd; | |
24c7cd06 | 2043 | unsigned long flags; |
1da177e4 | 2044 | |
35644090 | 2045 | SBP2_INFO("aborting sbp2 command"); |
1da177e4 LT |
2046 | scsi_print_command(SCpnt); |
2047 | ||
138c8af8 SR |
2048 | if (sbp2util_node_is_available(lu)) { |
2049 | sbp2_agent_reset(lu, 1); | |
1da177e4 | 2050 | |
23077f1d | 2051 | /* Return a matching command structure to the free pool. */ |
138c8af8 SR |
2052 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
2053 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); | |
2054 | if (cmd) { | |
97d552e3 | 2055 | dma_sync_single_for_cpu(hi->host->device.parent, |
138c8af8 SR |
2056 | cmd->command_orb_dma, |
2057 | sizeof(struct sbp2_command_orb), | |
9b7d9c09 | 2058 | DMA_TO_DEVICE); |
97d552e3 SR |
2059 | dma_sync_single_for_cpu(hi->host->device.parent, |
2060 | cmd->sge_dma, | |
138c8af8 | 2061 | sizeof(cmd->scatter_gather_element), |
2446a79f | 2062 | DMA_TO_DEVICE); |
138c8af8 SR |
2063 | sbp2util_mark_command_completed(lu, cmd); |
2064 | if (cmd->Current_SCpnt) { | |
2065 | cmd->Current_SCpnt->result = DID_ABORT << 16; | |
2066 | cmd->Current_done(cmd->Current_SCpnt); | |
1da177e4 LT |
2067 | } |
2068 | } | |
138c8af8 | 2069 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
1da177e4 | 2070 | |
138c8af8 | 2071 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
1da177e4 LT |
2072 | } |
2073 | ||
a237f35f | 2074 | return SUCCESS; |
1da177e4 LT |
2075 | } |
2076 | ||
2077 | /* | |
2078 | * Called by scsi stack when something has really gone wrong. | |
2079 | */ | |
abd559b1 | 2080 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 | 2081 | { |
138c8af8 | 2082 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
1da177e4 | 2083 | |
35644090 | 2084 | SBP2_INFO("reset requested"); |
1da177e4 | 2085 | |
138c8af8 | 2086 | if (sbp2util_node_is_available(lu)) { |
35644090 | 2087 | SBP2_INFO("generating sbp2 fetch agent reset"); |
138c8af8 | 2088 | sbp2_agent_reset(lu, 1); |
1da177e4 LT |
2089 | } |
2090 | ||
abd559b1 | 2091 | return SUCCESS; |
94d0e7b8 JG |
2092 | } |
2093 | ||
a237f35f SR |
2094 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2095 | struct device_attribute *attr, | |
2096 | char *buf) | |
1da177e4 LT |
2097 | { |
2098 | struct scsi_device *sdev; | |
138c8af8 | 2099 | struct sbp2_lu *lu; |
1da177e4 LT |
2100 | |
2101 | if (!(sdev = to_scsi_device(dev))) | |
2102 | return 0; | |
2103 | ||
138c8af8 | 2104 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
1da177e4 LT |
2105 | return 0; |
2106 | ||
d7794c86 SR |
2107 | if (sbp2_long_sysfs_ieee1394_id) |
2108 | return sprintf(buf, "%016Lx:%06x:%04x\n", | |
2109 | (unsigned long long)lu->ne->guid, | |
2110 | lu->ud->directory_id, ORB_SET_LUN(lu->lun)); | |
2111 | else | |
2112 | return sprintf(buf, "%016Lx:%d:%d\n", | |
2113 | (unsigned long long)lu->ne->guid, | |
2114 | lu->ud->id, ORB_SET_LUN(lu->lun)); | |
1da177e4 | 2115 | } |
1da177e4 LT |
2116 | |
2117 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2118 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2119 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2120 | MODULE_LICENSE("GPL"); | |
2121 | ||
1da177e4 LT |
2122 | static int sbp2_module_init(void) |
2123 | { | |
2124 | int ret; | |
2125 | ||
ca0c7453 SR |
2126 | if (sbp2_serialize_io) { |
2127 | sbp2_shost_template.can_queue = 1; | |
2128 | sbp2_shost_template.cmd_per_lun = 1; | |
1da177e4 LT |
2129 | } |
2130 | ||
ca0c7453 | 2131 | sbp2_shost_template.max_sectors = sbp2_max_sectors; |
1da177e4 | 2132 | |
1da177e4 | 2133 | hpsb_register_highlevel(&sbp2_highlevel); |
1da177e4 LT |
2134 | ret = hpsb_register_protocol(&sbp2_driver); |
2135 | if (ret) { | |
2136 | SBP2_ERR("Failed to register protocol"); | |
2137 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2138 | return ret; | |
2139 | } | |
1da177e4 LT |
2140 | return 0; |
2141 | } | |
2142 | ||
2143 | static void __exit sbp2_module_exit(void) | |
2144 | { | |
1da177e4 | 2145 | hpsb_unregister_protocol(&sbp2_driver); |
1da177e4 LT |
2146 | hpsb_unregister_highlevel(&sbp2_highlevel); |
2147 | } | |
2148 | ||
2149 | module_init(sbp2_module_init); | |
2150 | module_exit(sbp2_module_exit); |