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3b20eb23 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
bef4a34a | 2 | /* |
bef4a34a HJ |
3 | * Copyright (c) 2009, Microsoft Corporation. |
4 | * | |
bef4a34a HJ |
5 | * Authors: |
6 | * Haiyang Zhang <haiyangz@microsoft.com> | |
7 | * Hank Janssen <hjanssen@microsoft.com> | |
972621c9 | 8 | * K. Y. Srinivasan <kys@microsoft.com> |
bef4a34a | 9 | */ |
a1be1706 S |
10 | |
11 | #include <linux/kernel.h> | |
f0d79fe9 | 12 | #include <linux/wait.h> |
a1be1706 S |
13 | #include <linux/sched.h> |
14 | #include <linux/completion.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/delay.h> | |
bef4a34a | 18 | #include <linux/init.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
bef4a34a HJ |
20 | #include <linux/module.h> |
21 | #include <linux/device.h> | |
46a97191 | 22 | #include <linux/hyperv.h> |
56b26e69 | 23 | #include <linux/blkdev.h> |
bef4a34a HJ |
24 | #include <scsi/scsi.h> |
25 | #include <scsi/scsi_cmnd.h> | |
26 | #include <scsi/scsi_host.h> | |
27 | #include <scsi/scsi_device.h> | |
28 | #include <scsi/scsi_tcq.h> | |
29 | #include <scsi/scsi_eh.h> | |
30 | #include <scsi/scsi_devinfo.h> | |
bef4a34a | 31 | #include <scsi/scsi_dbg.h> |
dac58241 | 32 | #include <scsi/scsi_transport_fc.h> |
d791a8c6 | 33 | #include <scsi/scsi_transport.h> |
3f335ea2 | 34 | |
09f0355f | 35 | /* |
af9584b8 S |
36 | * All wire protocol details (storage protocol between the guest and the host) |
37 | * are consolidated here. | |
38 | * | |
39 | * Begin protocol definitions. | |
09f0355f S |
40 | */ |
41 | ||
09f0355f S |
42 | /* |
43 | * Version history: | |
44 | * V1 Beta: 0.1 | |
45 | * V1 RC < 2008/1/31: 1.0 | |
46 | * V1 RC > 2008/1/31: 2.0 | |
47 | * Win7: 4.2 | |
8b612fa2 | 48 | * Win8: 5.1 |
1a363108 KM |
49 | * Win8.1: 6.0 |
50 | * Win10: 6.2 | |
09f0355f S |
51 | */ |
52 | ||
2492fd7a KM |
53 | #define VMSTOR_PROTO_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \ |
54 | (((MINOR_) & 0xff))) | |
8b612fa2 | 55 | |
1a363108 | 56 | #define VMSTOR_PROTO_VERSION_WIN6 VMSTOR_PROTO_VERSION(2, 0) |
2492fd7a KM |
57 | #define VMSTOR_PROTO_VERSION_WIN7 VMSTOR_PROTO_VERSION(4, 2) |
58 | #define VMSTOR_PROTO_VERSION_WIN8 VMSTOR_PROTO_VERSION(5, 1) | |
1a363108 KM |
59 | #define VMSTOR_PROTO_VERSION_WIN8_1 VMSTOR_PROTO_VERSION(6, 0) |
60 | #define VMSTOR_PROTO_VERSION_WIN10 VMSTOR_PROTO_VERSION(6, 2) | |
f0d79fe9 | 61 | |
f0d79fe9 S |
62 | /* Packet structure describing virtual storage requests. */ |
63 | enum vstor_packet_operation { | |
64 | VSTOR_OPERATION_COMPLETE_IO = 1, | |
65 | VSTOR_OPERATION_REMOVE_DEVICE = 2, | |
66 | VSTOR_OPERATION_EXECUTE_SRB = 3, | |
67 | VSTOR_OPERATION_RESET_LUN = 4, | |
68 | VSTOR_OPERATION_RESET_ADAPTER = 5, | |
69 | VSTOR_OPERATION_RESET_BUS = 6, | |
70 | VSTOR_OPERATION_BEGIN_INITIALIZATION = 7, | |
71 | VSTOR_OPERATION_END_INITIALIZATION = 8, | |
72 | VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9, | |
73 | VSTOR_OPERATION_QUERY_PROPERTIES = 10, | |
2b9525f5 | 74 | VSTOR_OPERATION_ENUMERATE_BUS = 11, |
8b612fa2 S |
75 | VSTOR_OPERATION_FCHBA_DATA = 12, |
76 | VSTOR_OPERATION_CREATE_SUB_CHANNELS = 13, | |
77 | VSTOR_OPERATION_MAXIMUM = 13 | |
78 | }; | |
79 | ||
80 | /* | |
81 | * WWN packet for Fibre Channel HBA | |
82 | */ | |
83 | ||
84 | struct hv_fc_wwn_packet { | |
83d1e8b9 S |
85 | u8 primary_active; |
86 | u8 reserved1[3]; | |
8b612fa2 S |
87 | u8 primary_port_wwn[8]; |
88 | u8 primary_node_wwn[8]; | |
89 | u8 secondary_port_wwn[8]; | |
90 | u8 secondary_node_wwn[8]; | |
f0d79fe9 S |
91 | }; |
92 | ||
8b612fa2 S |
93 | |
94 | ||
95 | /* | |
96 | * SRB Flag Bits | |
97 | */ | |
98 | ||
99 | #define SRB_FLAGS_QUEUE_ACTION_ENABLE 0x00000002 | |
100 | #define SRB_FLAGS_DISABLE_DISCONNECT 0x00000004 | |
101 | #define SRB_FLAGS_DISABLE_SYNCH_TRANSFER 0x00000008 | |
102 | #define SRB_FLAGS_BYPASS_FROZEN_QUEUE 0x00000010 | |
103 | #define SRB_FLAGS_DISABLE_AUTOSENSE 0x00000020 | |
104 | #define SRB_FLAGS_DATA_IN 0x00000040 | |
105 | #define SRB_FLAGS_DATA_OUT 0x00000080 | |
106 | #define SRB_FLAGS_NO_DATA_TRANSFER 0x00000000 | |
107 | #define SRB_FLAGS_UNSPECIFIED_DIRECTION (SRB_FLAGS_DATA_IN | SRB_FLAGS_DATA_OUT) | |
108 | #define SRB_FLAGS_NO_QUEUE_FREEZE 0x00000100 | |
109 | #define SRB_FLAGS_ADAPTER_CACHE_ENABLE 0x00000200 | |
110 | #define SRB_FLAGS_FREE_SENSE_BUFFER 0x00000400 | |
111 | ||
112 | /* | |
113 | * This flag indicates the request is part of the workflow for processing a D3. | |
114 | */ | |
115 | #define SRB_FLAGS_D3_PROCESSING 0x00000800 | |
116 | #define SRB_FLAGS_IS_ACTIVE 0x00010000 | |
117 | #define SRB_FLAGS_ALLOCATED_FROM_ZONE 0x00020000 | |
118 | #define SRB_FLAGS_SGLIST_FROM_POOL 0x00040000 | |
119 | #define SRB_FLAGS_BYPASS_LOCKED_QUEUE 0x00080000 | |
120 | #define SRB_FLAGS_NO_KEEP_AWAKE 0x00100000 | |
121 | #define SRB_FLAGS_PORT_DRIVER_ALLOCSENSE 0x00200000 | |
122 | #define SRB_FLAGS_PORT_DRIVER_SENSEHASPORT 0x00400000 | |
123 | #define SRB_FLAGS_DONT_START_NEXT_PACKET 0x00800000 | |
124 | #define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000 | |
125 | #define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000 | |
126 | ||
3cd6d3d9 LL |
127 | #define SP_UNTAGGED ((unsigned char) ~0) |
128 | #define SRB_SIMPLE_TAG_REQUEST 0x20 | |
8b612fa2 | 129 | |
f0d79fe9 S |
130 | /* |
131 | * Platform neutral description of a scsi request - | |
132 | * this remains the same across the write regardless of 32/64 bit | |
133 | * note: it's patterned off the SCSI_PASS_THROUGH structure | |
134 | */ | |
6b2f9495 | 135 | #define STORVSC_MAX_CMD_LEN 0x10 |
8b612fa2 S |
136 | |
137 | #define POST_WIN7_STORVSC_SENSE_BUFFER_SIZE 0x14 | |
138 | #define PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE 0x12 | |
139 | ||
140 | #define STORVSC_SENSE_BUFFER_SIZE 0x14 | |
6b2f9495 | 141 | #define STORVSC_MAX_BUF_LEN_WITH_PADDING 0x14 |
f0d79fe9 | 142 | |
8b612fa2 S |
143 | /* |
144 | * Sense buffer size changed in win8; have a run-time | |
cb11fead KM |
145 | * variable to track the size we should use. This value will |
146 | * likely change during protocol negotiation but it is valid | |
147 | * to start by assuming pre-Win8. | |
8b612fa2 | 148 | */ |
cb11fead | 149 | static int sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE; |
8b612fa2 S |
150 | |
151 | /* | |
cb11fead KM |
152 | * The storage protocol version is determined during the |
153 | * initial exchange with the host. It will indicate which | |
154 | * storage functionality is available in the host. | |
155 | */ | |
2492fd7a | 156 | static int vmstor_proto_version; |
8b612fa2 | 157 | |
f8aea701 LL |
158 | #define STORVSC_LOGGING_NONE 0 |
159 | #define STORVSC_LOGGING_ERROR 1 | |
160 | #define STORVSC_LOGGING_WARN 2 | |
161 | ||
162 | static int logging_level = STORVSC_LOGGING_ERROR; | |
163 | module_param(logging_level, int, S_IRUGO|S_IWUSR); | |
164 | MODULE_PARM_DESC(logging_level, | |
165 | "Logging level, 0 - None, 1 - Error (default), 2 - Warning."); | |
166 | ||
167 | static inline bool do_logging(int level) | |
168 | { | |
169 | return logging_level >= level; | |
170 | } | |
171 | ||
172 | #define storvsc_log(dev, level, fmt, ...) \ | |
173 | do { \ | |
174 | if (do_logging(level)) \ | |
175 | dev_warn(&(dev)->device, fmt, ##__VA_ARGS__); \ | |
176 | } while (0) | |
177 | ||
8b612fa2 S |
178 | struct vmscsi_win8_extension { |
179 | /* | |
180 | * The following were added in Windows 8 | |
181 | */ | |
182 | u16 reserve; | |
183 | u8 queue_tag; | |
184 | u8 queue_action; | |
185 | u32 srb_flags; | |
186 | u32 time_out_value; | |
187 | u32 queue_sort_ey; | |
188 | } __packed; | |
189 | ||
f0d79fe9 | 190 | struct vmscsi_request { |
c649114a S |
191 | u16 length; |
192 | u8 srb_status; | |
193 | u8 scsi_status; | |
f0d79fe9 | 194 | |
c649114a S |
195 | u8 port_number; |
196 | u8 path_id; | |
197 | u8 target_id; | |
198 | u8 lun; | |
f0d79fe9 | 199 | |
c649114a S |
200 | u8 cdb_length; |
201 | u8 sense_info_length; | |
202 | u8 data_in; | |
203 | u8 reserved; | |
f0d79fe9 | 204 | |
c649114a | 205 | u32 data_transfer_length; |
f0d79fe9 S |
206 | |
207 | union { | |
6b2f9495 S |
208 | u8 cdb[STORVSC_MAX_CMD_LEN]; |
209 | u8 sense_data[STORVSC_SENSE_BUFFER_SIZE]; | |
210 | u8 reserved_array[STORVSC_MAX_BUF_LEN_WITH_PADDING]; | |
f0d79fe9 | 211 | }; |
8b612fa2 S |
212 | /* |
213 | * The following was added in win8. | |
214 | */ | |
215 | struct vmscsi_win8_extension win8_extension; | |
216 | ||
f0d79fe9 S |
217 | } __attribute((packed)); |
218 | ||
219 | ||
cb11fead KM |
220 | /* |
221 | * The size of the vmscsi_request has changed in win8. The | |
222 | * additional size is because of new elements added to the | |
223 | * structure. These elements are valid only when we are talking | |
224 | * to a win8 host. | |
225 | * Track the correction to size we need to apply. This value | |
226 | * will likely change during protocol negotiation but it is | |
227 | * valid to start by assuming pre-Win8. | |
228 | */ | |
229 | static int vmscsi_size_delta = sizeof(struct vmscsi_win8_extension); | |
230 | ||
1a363108 KM |
231 | /* |
232 | * The list of storage protocols in order of preference. | |
233 | */ | |
234 | struct vmstor_protocol { | |
235 | int protocol_version; | |
236 | int sense_buffer_size; | |
237 | int vmscsi_size_delta; | |
238 | }; | |
239 | ||
240 | ||
241 | static const struct vmstor_protocol vmstor_protocols[] = { | |
242 | { | |
243 | VMSTOR_PROTO_VERSION_WIN10, | |
244 | POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, | |
245 | 0 | |
246 | }, | |
247 | { | |
248 | VMSTOR_PROTO_VERSION_WIN8_1, | |
249 | POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, | |
250 | 0 | |
251 | }, | |
252 | { | |
253 | VMSTOR_PROTO_VERSION_WIN8, | |
254 | POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, | |
255 | 0 | |
256 | }, | |
257 | { | |
258 | VMSTOR_PROTO_VERSION_WIN7, | |
259 | PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, | |
260 | sizeof(struct vmscsi_win8_extension), | |
261 | }, | |
262 | { | |
263 | VMSTOR_PROTO_VERSION_WIN6, | |
264 | PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, | |
265 | sizeof(struct vmscsi_win8_extension), | |
266 | } | |
267 | }; | |
268 | ||
269 | ||
f0d79fe9 | 270 | /* |
183b8021 | 271 | * This structure is sent during the initialization phase to get the different |
f0d79fe9 S |
272 | * properties of the channel. |
273 | */ | |
8b612fa2 S |
274 | |
275 | #define STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL 0x1 | |
276 | ||
f0d79fe9 | 277 | struct vmstorage_channel_properties { |
8b612fa2 S |
278 | u32 reserved; |
279 | u16 max_channel_cnt; | |
280 | u16 reserved1; | |
f0d79fe9 | 281 | |
8b612fa2 | 282 | u32 flags; |
c649114a | 283 | u32 max_transfer_bytes; |
f0d79fe9 | 284 | |
8b612fa2 | 285 | u64 reserved2; |
f0d79fe9 S |
286 | } __packed; |
287 | ||
288 | /* This structure is sent during the storage protocol negotiations. */ | |
289 | struct vmstorage_protocol_version { | |
290 | /* Major (MSW) and minor (LSW) version numbers. */ | |
85904a5e | 291 | u16 major_minor; |
f0d79fe9 S |
292 | |
293 | /* | |
294 | * Revision number is auto-incremented whenever this file is changed | |
295 | * (See FILL_VMSTOR_REVISION macro above). Mismatch does not | |
296 | * definitely indicate incompatibility--but it does indicate mismatched | |
297 | * builds. | |
c649114a | 298 | * This is only used on the windows side. Just set it to 0. |
f0d79fe9 | 299 | */ |
85904a5e | 300 | u16 revision; |
f0d79fe9 S |
301 | } __packed; |
302 | ||
303 | /* Channel Property Flags */ | |
304 | #define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1 | |
305 | #define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2 | |
306 | ||
307 | struct vstor_packet { | |
308 | /* Requested operation type */ | |
309 | enum vstor_packet_operation operation; | |
310 | ||
311 | /* Flags - see below for values */ | |
c649114a | 312 | u32 flags; |
f0d79fe9 S |
313 | |
314 | /* Status of the request returned from the server side. */ | |
c649114a | 315 | u32 status; |
f0d79fe9 S |
316 | |
317 | /* Data payload area */ | |
318 | union { | |
319 | /* | |
320 | * Structure used to forward SCSI commands from the | |
321 | * client to the server. | |
322 | */ | |
323 | struct vmscsi_request vm_srb; | |
324 | ||
325 | /* Structure used to query channel properties. */ | |
326 | struct vmstorage_channel_properties storage_channel_properties; | |
327 | ||
328 | /* Used during version negotiations. */ | |
329 | struct vmstorage_protocol_version version; | |
8b612fa2 S |
330 | |
331 | /* Fibre channel address packet */ | |
332 | struct hv_fc_wwn_packet wwn_packet; | |
333 | ||
334 | /* Number of sub-channels to create */ | |
335 | u16 sub_channel_count; | |
336 | ||
337 | /* This will be the maximum of the union members */ | |
338 | u8 buffer[0x34]; | |
f0d79fe9 S |
339 | }; |
340 | } __packed; | |
341 | ||
f0d79fe9 | 342 | /* |
09f0355f S |
343 | * Packet Flags: |
344 | * | |
f0d79fe9 S |
345 | * This flag indicates that the server should send back a completion for this |
346 | * packet. | |
347 | */ | |
09f0355f | 348 | |
f0d79fe9 S |
349 | #define REQUEST_COMPLETION_FLAG 0x1 |
350 | ||
f0d79fe9 S |
351 | /* Matches Windows-end */ |
352 | enum storvsc_request_type { | |
c649114a | 353 | WRITE_TYPE = 0, |
f0d79fe9 S |
354 | READ_TYPE, |
355 | UNKNOWN_TYPE, | |
356 | }; | |
357 | ||
16046320 S |
358 | /* |
359 | * SRB status codes and masks; a subset of the codes used here. | |
360 | */ | |
361 | ||
362 | #define SRB_STATUS_AUTOSENSE_VALID 0x80 | |
3209f9d7 | 363 | #define SRB_STATUS_QUEUE_FROZEN 0x40 |
16046320 S |
364 | #define SRB_STATUS_INVALID_LUN 0x20 |
365 | #define SRB_STATUS_SUCCESS 0x01 | |
6781209e | 366 | #define SRB_STATUS_ABORTED 0x02 |
16046320 | 367 | #define SRB_STATUS_ERROR 0x04 |
40630f46 | 368 | #define SRB_STATUS_DATA_OVERRUN 0x12 |
16046320 | 369 | |
3209f9d7 S |
370 | #define SRB_STATUS(status) \ |
371 | (status & ~(SRB_STATUS_AUTOSENSE_VALID | SRB_STATUS_QUEUE_FROZEN)) | |
af9584b8 S |
372 | /* |
373 | * This is the end of Protocol specific defines. | |
374 | */ | |
375 | ||
ed2e63aa | 376 | static int storvsc_ringbuffer_size = (128 * 1024); |
f458aada | 377 | static u32 max_outstanding_req_per_channel; |
adfbd028 | 378 | static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth); |
f458aada S |
379 | |
380 | static int storvsc_vcpus_per_sub_channel = 4; | |
af9584b8 S |
381 | |
382 | module_param(storvsc_ringbuffer_size, int, S_IRUGO); | |
383 | MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)"); | |
384 | ||
f458aada | 385 | module_param(storvsc_vcpus_per_sub_channel, int, S_IRUGO); |
74e26784 | 386 | MODULE_PARM_DESC(storvsc_vcpus_per_sub_channel, "Ratio of VCPUs to subchannels"); |
2217a47d LL |
387 | |
388 | static int ring_avail_percent_lowater = 10; | |
389 | module_param(ring_avail_percent_lowater, int, S_IRUGO); | |
390 | MODULE_PARM_DESC(ring_avail_percent_lowater, | |
391 | "Select a channel if available ring size > this in percent"); | |
392 | ||
893def38 S |
393 | /* |
394 | * Timeout in seconds for all devices managed by this driver. | |
395 | */ | |
396 | static int storvsc_timeout = 180; | |
397 | ||
dac58241 S |
398 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
399 | static struct scsi_transport_template *fc_transport_template; | |
400 | #endif | |
af9584b8 | 401 | |
6f94d5de S |
402 | static void storvsc_on_channel_callback(void *context); |
403 | ||
4cd83ecd S |
404 | #define STORVSC_MAX_LUNS_PER_TARGET 255 |
405 | #define STORVSC_MAX_TARGETS 2 | |
406 | #define STORVSC_MAX_CHANNELS 8 | |
af9584b8 | 407 | |
4cd83ecd S |
408 | #define STORVSC_FC_MAX_LUNS_PER_TARGET 255 |
409 | #define STORVSC_FC_MAX_TARGETS 128 | |
410 | #define STORVSC_FC_MAX_CHANNELS 8 | |
af9584b8 | 411 | |
4cd83ecd S |
412 | #define STORVSC_IDE_MAX_LUNS_PER_TARGET 64 |
413 | #define STORVSC_IDE_MAX_TARGETS 1 | |
414 | #define STORVSC_IDE_MAX_CHANNELS 1 | |
16046320 | 415 | |
61eaffc9 | 416 | struct storvsc_cmd_request { |
61eaffc9 S |
417 | struct scsi_cmnd *cmd; |
418 | ||
f0d79fe9 S |
419 | struct hv_device *device; |
420 | ||
421 | /* Synchronize the request/response if needed */ | |
422 | struct completion wait_event; | |
423 | ||
be0cf6ca S |
424 | struct vmbus_channel_packet_multipage_buffer mpb; |
425 | struct vmbus_packet_mpb_array *payload; | |
426 | u32 payload_sz; | |
427 | ||
f0d79fe9 S |
428 | struct vstor_packet vstor_packet; |
429 | }; | |
430 | ||
431 | ||
f0d79fe9 S |
432 | /* A storvsc device is a device object that contains a vmbus channel */ |
433 | struct storvsc_device { | |
434 | struct hv_device *device; | |
435 | ||
436 | bool destroy; | |
437 | bool drain_notify; | |
438 | atomic_t num_outstanding_req; | |
cd654ea1 | 439 | struct Scsi_Host *host; |
f0d79fe9 S |
440 | |
441 | wait_queue_head_t waiting_to_drain; | |
442 | ||
443 | /* | |
444 | * Each unique Port/Path/Target represents 1 channel ie scsi | |
445 | * controller. In reality, the pathid, targetid is always 0 | |
446 | * and the port is set by us | |
447 | */ | |
448 | unsigned int port_number; | |
449 | unsigned char path_id; | |
450 | unsigned char target_id; | |
451 | ||
5117b936 S |
452 | /* |
453 | * Max I/O, the device can support. | |
454 | */ | |
455 | u32 max_transfer_bytes; | |
d86adf48 S |
456 | /* |
457 | * Number of sub-channels we will open. | |
458 | */ | |
459 | u16 num_sc; | |
460 | struct vmbus_channel **stor_chns; | |
461 | /* | |
462 | * Mask of CPUs bound to subchannels. | |
463 | */ | |
464 | struct cpumask alloced_cpus; | |
f0d79fe9 | 465 | /* Used for vsc/vsp channel reset process */ |
61eaffc9 S |
466 | struct storvsc_cmd_request init_request; |
467 | struct storvsc_cmd_request reset_request; | |
dac58241 S |
468 | /* |
469 | * Currently active port and node names for FC devices. | |
470 | */ | |
471 | u64 node_name; | |
472 | u64 port_name; | |
daf0cd44 CA |
473 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
474 | struct fc_rport *rport; | |
475 | #endif | |
f0d79fe9 S |
476 | }; |
477 | ||
ce3e301c S |
478 | struct hv_host_device { |
479 | struct hv_device *dev; | |
c1b3d067 S |
480 | unsigned int port; |
481 | unsigned char path; | |
482 | unsigned char target; | |
436ad941 | 483 | struct workqueue_struct *handle_error_wq; |
c58cc70f LL |
484 | struct work_struct host_scan_work; |
485 | struct Scsi_Host *host; | |
c1b3d067 S |
486 | }; |
487 | ||
12675799 S |
488 | struct storvsc_scan_work { |
489 | struct work_struct work; | |
490 | struct Scsi_Host *host; | |
98441221 S |
491 | u8 lun; |
492 | u8 tgt_id; | |
12675799 S |
493 | }; |
494 | ||
6781209e S |
495 | static void storvsc_device_scan(struct work_struct *work) |
496 | { | |
497 | struct storvsc_scan_work *wrk; | |
6781209e S |
498 | struct scsi_device *sdev; |
499 | ||
500 | wrk = container_of(work, struct storvsc_scan_work, work); | |
6781209e | 501 | |
98441221 | 502 | sdev = scsi_device_lookup(wrk->host, 0, wrk->tgt_id, wrk->lun); |
6781209e S |
503 | if (!sdev) |
504 | goto done; | |
505 | scsi_rescan_device(&sdev->sdev_gendev); | |
506 | scsi_device_put(sdev); | |
507 | ||
508 | done: | |
509 | kfree(wrk); | |
510 | } | |
511 | ||
2a09ed3d | 512 | static void storvsc_host_scan(struct work_struct *work) |
12675799 | 513 | { |
2a09ed3d | 514 | struct Scsi_Host *host; |
34a716bc | 515 | struct scsi_device *sdev; |
c58cc70f LL |
516 | struct hv_host_device *host_device = |
517 | container_of(work, struct hv_host_device, host_scan_work); | |
12675799 | 518 | |
c58cc70f | 519 | host = host_device->host; |
34a716bc S |
520 | /* |
521 | * Before scanning the host, first check to see if any of the | |
522 | * currrently known devices have been hot removed. We issue a | |
523 | * "unit ready" command against all currently known devices. | |
524 | * This I/O will result in an error for devices that have been | |
525 | * removed. As part of handling the I/O error, we remove the device. | |
526 | * | |
527 | * When a LUN is added or removed, the host sends us a signal to | |
528 | * scan the host. Thus we are forced to discover the LUNs that | |
529 | * may have been removed this way. | |
530 | */ | |
531 | mutex_lock(&host->scan_mutex); | |
8d6a9f56 | 532 | shost_for_each_device(sdev, host) |
34a716bc | 533 | scsi_test_unit_ready(sdev, 1, 1, NULL); |
34a716bc S |
534 | mutex_unlock(&host->scan_mutex); |
535 | /* | |
536 | * Now scan the host to discover LUNs that may have been added. | |
537 | */ | |
2a09ed3d | 538 | scsi_scan_host(host); |
12675799 S |
539 | } |
540 | ||
b4017319 S |
541 | static void storvsc_remove_lun(struct work_struct *work) |
542 | { | |
543 | struct storvsc_scan_work *wrk; | |
544 | struct scsi_device *sdev; | |
545 | ||
546 | wrk = container_of(work, struct storvsc_scan_work, work); | |
547 | if (!scsi_host_get(wrk->host)) | |
548 | goto done; | |
549 | ||
98441221 | 550 | sdev = scsi_device_lookup(wrk->host, 0, wrk->tgt_id, wrk->lun); |
b4017319 S |
551 | |
552 | if (sdev) { | |
553 | scsi_remove_device(sdev); | |
554 | scsi_device_put(sdev); | |
555 | } | |
556 | scsi_host_put(wrk->host); | |
557 | ||
558 | done: | |
559 | kfree(wrk); | |
560 | } | |
561 | ||
af9584b8 | 562 | |
a8c18c57 S |
563 | /* |
564 | * We can get incoming messages from the host that are not in response to | |
565 | * messages that we have sent out. An example of this would be messages | |
566 | * received by the guest to notify dynamic addition/removal of LUNs. To | |
567 | * deal with potential race conditions where the driver may be in the | |
568 | * midst of being unloaded when we might receive an unsolicited message | |
569 | * from the host, we have implemented a mechanism to gurantee sequential | |
570 | * consistency: | |
571 | * | |
572 | * 1) Once the device is marked as being destroyed, we will fail all | |
573 | * outgoing messages. | |
574 | * 2) We permit incoming messages when the device is being destroyed, | |
575 | * only to properly account for messages already sent out. | |
576 | */ | |
577 | ||
f0d79fe9 S |
578 | static inline struct storvsc_device *get_out_stor_device( |
579 | struct hv_device *device) | |
580 | { | |
581 | struct storvsc_device *stor_device; | |
582 | ||
cd654ea1 | 583 | stor_device = hv_get_drvdata(device); |
f0d79fe9 S |
584 | |
585 | if (stor_device && stor_device->destroy) | |
586 | stor_device = NULL; | |
587 | ||
588 | return stor_device; | |
589 | } | |
590 | ||
591 | ||
592 | static inline void storvsc_wait_to_drain(struct storvsc_device *dev) | |
593 | { | |
594 | dev->drain_notify = true; | |
595 | wait_event(dev->waiting_to_drain, | |
596 | atomic_read(&dev->num_outstanding_req) == 0); | |
597 | dev->drain_notify = false; | |
598 | } | |
bef4a34a | 599 | |
8dcf37d4 S |
600 | static inline struct storvsc_device *get_in_stor_device( |
601 | struct hv_device *device) | |
602 | { | |
603 | struct storvsc_device *stor_device; | |
8dcf37d4 | 604 | |
cd654ea1 | 605 | stor_device = hv_get_drvdata(device); |
8dcf37d4 S |
606 | |
607 | if (!stor_device) | |
608 | goto get_in_err; | |
609 | ||
610 | /* | |
611 | * If the device is being destroyed; allow incoming | |
612 | * traffic only to cleanup outstanding requests. | |
613 | */ | |
614 | ||
615 | if (stor_device->destroy && | |
616 | (atomic_read(&stor_device->num_outstanding_req) == 0)) | |
617 | stor_device = NULL; | |
618 | ||
619 | get_in_err: | |
8dcf37d4 S |
620 | return stor_device; |
621 | ||
622 | } | |
623 | ||
6f94d5de S |
624 | static void handle_sc_creation(struct vmbus_channel *new_sc) |
625 | { | |
626 | struct hv_device *device = new_sc->primary_channel->device_obj; | |
c9675904 | 627 | struct device *dev = &device->device; |
6f94d5de S |
628 | struct storvsc_device *stor_device; |
629 | struct vmstorage_channel_properties props; | |
c9675904 | 630 | int ret; |
6f94d5de S |
631 | |
632 | stor_device = get_out_stor_device(device); | |
633 | if (!stor_device) | |
634 | return; | |
635 | ||
6f94d5de S |
636 | memset(&props, 0, sizeof(struct vmstorage_channel_properties)); |
637 | ||
c9675904 DC |
638 | ret = vmbus_open(new_sc, |
639 | storvsc_ringbuffer_size, | |
640 | storvsc_ringbuffer_size, | |
641 | (void *)&props, | |
642 | sizeof(struct vmstorage_channel_properties), | |
643 | storvsc_on_channel_callback, new_sc); | |
d86adf48 | 644 | |
c9675904 DC |
645 | /* In case vmbus_open() fails, we don't use the sub-channel. */ |
646 | if (ret != 0) { | |
647 | dev_err(dev, "Failed to open sub-channel: err=%d\n", ret); | |
648 | return; | |
d86adf48 | 649 | } |
c9675904 DC |
650 | |
651 | /* Add the sub-channel to the array of available channels. */ | |
652 | stor_device->stor_chns[new_sc->target_cpu] = new_sc; | |
653 | cpumask_set_cpu(new_sc->target_cpu, &stor_device->alloced_cpus); | |
6f94d5de S |
654 | } |
655 | ||
656 | static void handle_multichannel_storage(struct hv_device *device, int max_chns) | |
657 | { | |
c9675904 | 658 | struct device *dev = &device->device; |
6f94d5de | 659 | struct storvsc_device *stor_device; |
6f94d5de S |
660 | int num_sc; |
661 | struct storvsc_cmd_request *request; | |
662 | struct vstor_packet *vstor_packet; | |
663 | int ret, t; | |
664 | ||
382e06d1 MK |
665 | /* |
666 | * If the number of CPUs is artificially restricted, such as | |
667 | * with maxcpus=1 on the kernel boot line, Hyper-V could offer | |
668 | * sub-channels >= the number of CPUs. These sub-channels | |
669 | * should not be created. The primary channel is already created | |
670 | * and assigned to one CPU, so check against # CPUs - 1. | |
671 | */ | |
672 | num_sc = min((int)(num_online_cpus() - 1), max_chns); | |
673 | if (!num_sc) | |
674 | return; | |
675 | ||
6f94d5de S |
676 | stor_device = get_out_stor_device(device); |
677 | if (!stor_device) | |
678 | return; | |
679 | ||
d86adf48 | 680 | stor_device->num_sc = num_sc; |
6f94d5de S |
681 | request = &stor_device->init_request; |
682 | vstor_packet = &request->vstor_packet; | |
683 | ||
6f94d5de S |
684 | /* |
685 | * Establish a handler for dealing with subchannels. | |
686 | */ | |
687 | vmbus_set_sc_create_callback(device->channel, handle_sc_creation); | |
688 | ||
6f94d5de S |
689 | /* |
690 | * Request the host to create sub-channels. | |
691 | */ | |
692 | memset(request, 0, sizeof(struct storvsc_cmd_request)); | |
693 | init_completion(&request->wait_event); | |
694 | vstor_packet->operation = VSTOR_OPERATION_CREATE_SUB_CHANNELS; | |
695 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
696 | vstor_packet->sub_channel_count = num_sc; | |
697 | ||
698 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
699 | (sizeof(struct vstor_packet) - | |
700 | vmscsi_size_delta), | |
701 | (unsigned long)request, | |
702 | VM_PKT_DATA_INBAND, | |
703 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
704 | ||
c9675904 DC |
705 | if (ret != 0) { |
706 | dev_err(dev, "Failed to create sub-channel: err=%d\n", ret); | |
6f94d5de | 707 | return; |
c9675904 | 708 | } |
6f94d5de S |
709 | |
710 | t = wait_for_completion_timeout(&request->wait_event, 10*HZ); | |
c9675904 DC |
711 | if (t == 0) { |
712 | dev_err(dev, "Failed to create sub-channel: timed out\n"); | |
6f94d5de | 713 | return; |
c9675904 | 714 | } |
6f94d5de S |
715 | |
716 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || | |
c9675904 DC |
717 | vstor_packet->status != 0) { |
718 | dev_err(dev, "Failed to create sub-channel: op=%d, sts=%d\n", | |
719 | vstor_packet->operation, vstor_packet->status); | |
6f94d5de | 720 | return; |
c9675904 | 721 | } |
6f94d5de S |
722 | |
723 | /* | |
c9675904 DC |
724 | * We need to do nothing here, because vmbus_process_offer() |
725 | * invokes channel->sc_creation_callback, which will open and use | |
726 | * the sub-channel(s). | |
6f94d5de | 727 | */ |
6f94d5de S |
728 | } |
729 | ||
dac58241 S |
730 | static void cache_wwn(struct storvsc_device *stor_device, |
731 | struct vstor_packet *vstor_packet) | |
732 | { | |
733 | /* | |
734 | * Cache the currently active port and node ww names. | |
735 | */ | |
736 | if (vstor_packet->wwn_packet.primary_active) { | |
737 | stor_device->node_name = | |
738 | wwn_to_u64(vstor_packet->wwn_packet.primary_node_wwn); | |
739 | stor_device->port_name = | |
740 | wwn_to_u64(vstor_packet->wwn_packet.primary_port_wwn); | |
741 | } else { | |
742 | stor_device->node_name = | |
743 | wwn_to_u64(vstor_packet->wwn_packet.secondary_node_wwn); | |
744 | stor_device->port_name = | |
745 | wwn_to_u64(vstor_packet->wwn_packet.secondary_port_wwn); | |
746 | } | |
747 | } | |
748 | ||
59635018 S |
749 | |
750 | static int storvsc_execute_vstor_op(struct hv_device *device, | |
751 | struct storvsc_cmd_request *request, | |
752 | bool status_check) | |
8dcf37d4 | 753 | { |
8dcf37d4 | 754 | struct vstor_packet *vstor_packet; |
59635018 | 755 | int ret, t; |
8dcf37d4 | 756 | |
8dcf37d4 S |
757 | vstor_packet = &request->vstor_packet; |
758 | ||
8dcf37d4 | 759 | init_completion(&request->wait_event); |
8dcf37d4 S |
760 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; |
761 | ||
762 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
8b612fa2 S |
763 | (sizeof(struct vstor_packet) - |
764 | vmscsi_size_delta), | |
8dcf37d4 S |
765 | (unsigned long)request, |
766 | VM_PKT_DATA_INBAND, | |
767 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
768 | if (ret != 0) | |
dac58241 | 769 | return ret; |
8dcf37d4 S |
770 | |
771 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); | |
dac58241 S |
772 | if (t == 0) |
773 | return -ETIMEDOUT; | |
8dcf37d4 | 774 | |
59635018 S |
775 | if (!status_check) |
776 | return ret; | |
777 | ||
8dcf37d4 | 778 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || |
dac58241 S |
779 | vstor_packet->status != 0) |
780 | return -EINVAL; | |
8dcf37d4 | 781 | |
59635018 S |
782 | return ret; |
783 | } | |
784 | ||
785 | static int storvsc_channel_init(struct hv_device *device, bool is_fc) | |
786 | { | |
787 | struct storvsc_device *stor_device; | |
788 | struct storvsc_cmd_request *request; | |
789 | struct vstor_packet *vstor_packet; | |
790 | int ret, i; | |
791 | int max_chns; | |
792 | bool process_sub_channels = false; | |
793 | ||
794 | stor_device = get_out_stor_device(device); | |
795 | if (!stor_device) | |
796 | return -ENODEV; | |
797 | ||
798 | request = &stor_device->init_request; | |
799 | vstor_packet = &request->vstor_packet; | |
800 | ||
801 | /* | |
802 | * Now, initiate the vsc/vsp initialization protocol on the open | |
803 | * channel | |
804 | */ | |
805 | memset(request, 0, sizeof(struct storvsc_cmd_request)); | |
806 | vstor_packet->operation = VSTOR_OPERATION_BEGIN_INITIALIZATION; | |
807 | ret = storvsc_execute_vstor_op(device, request, true); | |
808 | if (ret) | |
809 | return ret; | |
810 | /* | |
811 | * Query host supported protocol version. | |
812 | */ | |
8dcf37d4 | 813 | |
1a363108 KM |
814 | for (i = 0; i < ARRAY_SIZE(vmstor_protocols); i++) { |
815 | /* reuse the packet for version range supported */ | |
816 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); | |
817 | vstor_packet->operation = | |
818 | VSTOR_OPERATION_QUERY_PROTOCOL_VERSION; | |
8dcf37d4 | 819 | |
1a363108 KM |
820 | vstor_packet->version.major_minor = |
821 | vmstor_protocols[i].protocol_version; | |
85904a5e | 822 | |
1a363108 KM |
823 | /* |
824 | * The revision number is only used in Windows; set it to 0. | |
825 | */ | |
826 | vstor_packet->version.revision = 0; | |
59635018 | 827 | ret = storvsc_execute_vstor_op(device, request, false); |
1a363108 | 828 | if (ret != 0) |
dac58241 | 829 | return ret; |
8dcf37d4 | 830 | |
dac58241 S |
831 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO) |
832 | return -EINVAL; | |
1a363108 KM |
833 | |
834 | if (vstor_packet->status == 0) { | |
835 | vmstor_proto_version = | |
836 | vmstor_protocols[i].protocol_version; | |
837 | ||
838 | sense_buffer_size = | |
839 | vmstor_protocols[i].sense_buffer_size; | |
840 | ||
841 | vmscsi_size_delta = | |
842 | vmstor_protocols[i].vmscsi_size_delta; | |
843 | ||
844 | break; | |
845 | } | |
8dcf37d4 S |
846 | } |
847 | ||
dac58241 S |
848 | if (vstor_packet->status != 0) |
849 | return -EINVAL; | |
8dcf37d4 S |
850 | |
851 | ||
852 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); | |
853 | vstor_packet->operation = VSTOR_OPERATION_QUERY_PROPERTIES; | |
59635018 | 854 | ret = storvsc_execute_vstor_op(device, request, true); |
8dcf37d4 | 855 | if (ret != 0) |
dac58241 | 856 | return ret; |
8dcf37d4 | 857 | |
6f94d5de S |
858 | /* |
859 | * Check to see if multi-channel support is there. | |
860 | * Hosts that implement protocol version of 5.1 and above | |
861 | * support multi-channel. | |
862 | */ | |
863 | max_chns = vstor_packet->storage_channel_properties.max_channel_cnt; | |
d86adf48 S |
864 | |
865 | /* | |
866 | * Allocate state to manage the sub-channels. | |
867 | * We allocate an array based on the numbers of possible CPUs | |
868 | * (Hyper-V does not support cpu online/offline). | |
869 | * This Array will be sparseley populated with unique | |
870 | * channels - primary + sub-channels. | |
871 | * We will however populate all the slots to evenly distribute | |
872 | * the load. | |
873 | */ | |
e0408528 | 874 | stor_device->stor_chns = kcalloc(num_possible_cpus(), sizeof(void *), |
d86adf48 S |
875 | GFP_KERNEL); |
876 | if (stor_device->stor_chns == NULL) | |
877 | return -ENOMEM; | |
878 | ||
879 | stor_device->stor_chns[device->channel->target_cpu] = device->channel; | |
880 | cpumask_set_cpu(device->channel->target_cpu, | |
881 | &stor_device->alloced_cpus); | |
882 | ||
e6c4bc66 | 883 | if (vmstor_proto_version >= VMSTOR_PROTO_VERSION_WIN8) { |
6f94d5de S |
884 | if (vstor_packet->storage_channel_properties.flags & |
885 | STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL) | |
886 | process_sub_channels = true; | |
887 | } | |
5117b936 S |
888 | stor_device->max_transfer_bytes = |
889 | vstor_packet->storage_channel_properties.max_transfer_bytes; | |
6f94d5de | 890 | |
dac58241 S |
891 | if (!is_fc) |
892 | goto done; | |
893 | ||
59635018 S |
894 | /* |
895 | * For FC devices retrieve FC HBA data. | |
896 | */ | |
dac58241 S |
897 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); |
898 | vstor_packet->operation = VSTOR_OPERATION_FCHBA_DATA; | |
59635018 | 899 | ret = storvsc_execute_vstor_op(device, request, true); |
dac58241 S |
900 | if (ret != 0) |
901 | return ret; | |
902 | ||
dac58241 S |
903 | /* |
904 | * Cache the currently active port and node ww names. | |
905 | */ | |
906 | cache_wwn(stor_device, vstor_packet); | |
907 | ||
908 | done: | |
909 | ||
8dcf37d4 S |
910 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); |
911 | vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION; | |
59635018 | 912 | ret = storvsc_execute_vstor_op(device, request, true); |
8dcf37d4 | 913 | if (ret != 0) |
dac58241 | 914 | return ret; |
8dcf37d4 | 915 | |
6f94d5de S |
916 | if (process_sub_channels) |
917 | handle_multichannel_storage(device, max_chns); | |
918 | ||
8dcf37d4 S |
919 | return ret; |
920 | } | |
921 | ||
c50bd448 S |
922 | static void storvsc_handle_error(struct vmscsi_request *vm_srb, |
923 | struct scsi_cmnd *scmnd, | |
924 | struct Scsi_Host *host, | |
925 | u8 asc, u8 ascq) | |
926 | { | |
927 | struct storvsc_scan_work *wrk; | |
928 | void (*process_err_fn)(struct work_struct *work); | |
436ad941 | 929 | struct hv_host_device *host_dev = shost_priv(host); |
c50bd448 S |
930 | bool do_work = false; |
931 | ||
3209f9d7 | 932 | switch (SRB_STATUS(vm_srb->srb_status)) { |
c50bd448 | 933 | case SRB_STATUS_ERROR: |
bba5dc33 LL |
934 | /* |
935 | * Let upper layer deal with error when | |
936 | * sense message is present. | |
937 | */ | |
938 | ||
939 | if (vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID) | |
940 | break; | |
c50bd448 S |
941 | /* |
942 | * If there is an error; offline the device since all | |
943 | * error recovery strategies would have already been | |
944 | * deployed on the host side. However, if the command | |
945 | * were a pass-through command deal with it appropriately. | |
946 | */ | |
947 | switch (scmnd->cmnd[0]) { | |
948 | case ATA_16: | |
949 | case ATA_12: | |
950 | set_host_byte(scmnd, DID_PASSTHROUGH); | |
951 | break; | |
3533f860 S |
952 | /* |
953 | * On Some Windows hosts TEST_UNIT_READY command can return | |
954 | * SRB_STATUS_ERROR, let the upper level code deal with it | |
955 | * based on the sense information. | |
956 | */ | |
957 | case TEST_UNIT_READY: | |
958 | break; | |
c50bd448 | 959 | default: |
d1b8b239 | 960 | set_host_byte(scmnd, DID_ERROR); |
c50bd448 S |
961 | } |
962 | break; | |
963 | case SRB_STATUS_INVALID_LUN: | |
d1b8b239 | 964 | set_host_byte(scmnd, DID_NO_CONNECT); |
c50bd448 S |
965 | do_work = true; |
966 | process_err_fn = storvsc_remove_lun; | |
967 | break; | |
ff06c5ff VK |
968 | case SRB_STATUS_ABORTED: |
969 | if (vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID && | |
970 | (asc == 0x2a) && (ascq == 0x9)) { | |
6781209e S |
971 | do_work = true; |
972 | process_err_fn = storvsc_device_scan; | |
973 | /* | |
974 | * Retry the I/O that trigerred this. | |
975 | */ | |
976 | set_host_byte(scmnd, DID_REQUEUE); | |
977 | } | |
978 | break; | |
c50bd448 | 979 | } |
6781209e | 980 | |
c50bd448 S |
981 | if (!do_work) |
982 | return; | |
983 | ||
984 | /* | |
985 | * We need to schedule work to process this error; schedule it. | |
986 | */ | |
987 | wrk = kmalloc(sizeof(struct storvsc_scan_work), GFP_ATOMIC); | |
988 | if (!wrk) { | |
989 | set_host_byte(scmnd, DID_TARGET_FAILURE); | |
990 | return; | |
991 | } | |
992 | ||
993 | wrk->host = host; | |
994 | wrk->lun = vm_srb->lun; | |
98441221 | 995 | wrk->tgt_id = vm_srb->target_id; |
c50bd448 | 996 | INIT_WORK(&wrk->work, process_err_fn); |
436ad941 | 997 | queue_work(host_dev->handle_error_wq, &wrk->work); |
c50bd448 S |
998 | } |
999 | ||
2707388c | 1000 | |
03996f20 S |
1001 | static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request, |
1002 | struct storvsc_device *stor_dev) | |
8dcf37d4 | 1003 | { |
2707388c | 1004 | struct scsi_cmnd *scmnd = cmd_request->cmd; |
2707388c S |
1005 | struct scsi_sense_hdr sense_hdr; |
1006 | struct vmscsi_request *vm_srb; | |
40630f46 | 1007 | u32 data_transfer_length; |
c50bd448 | 1008 | struct Scsi_Host *host; |
be0cf6ca S |
1009 | u32 payload_sz = cmd_request->payload_sz; |
1010 | void *payload = cmd_request->payload; | |
c50bd448 | 1011 | |
c50bd448 | 1012 | host = stor_dev->host; |
8dcf37d4 | 1013 | |
61eaffc9 | 1014 | vm_srb = &cmd_request->vstor_packet.vm_srb; |
40630f46 | 1015 | data_transfer_length = vm_srb->data_transfer_length; |
8dcf37d4 | 1016 | |
42e22cac S |
1017 | scmnd->result = vm_srb->scsi_status; |
1018 | ||
2707388c S |
1019 | if (scmnd->result) { |
1020 | if (scsi_normalize_sense(scmnd->sense_buffer, | |
f8aea701 | 1021 | SCSI_SENSE_BUFFERSIZE, &sense_hdr) && |
84b342c0 CA |
1022 | !(sense_hdr.sense_key == NOT_READY && |
1023 | sense_hdr.asc == 0x03A) && | |
f8aea701 | 1024 | do_logging(STORVSC_LOGGING_ERROR)) |
d811b848 HR |
1025 | scsi_print_sense_hdr(scmnd->device, "storvsc", |
1026 | &sense_hdr); | |
2707388c S |
1027 | } |
1028 | ||
40630f46 | 1029 | if (vm_srb->srb_status != SRB_STATUS_SUCCESS) { |
c50bd448 S |
1030 | storvsc_handle_error(vm_srb, scmnd, host, sense_hdr.asc, |
1031 | sense_hdr.ascq); | |
40630f46 LL |
1032 | /* |
1033 | * The Windows driver set data_transfer_length on | |
1034 | * SRB_STATUS_DATA_OVERRUN. On other errors, this value | |
1035 | * is untouched. In these cases we set it to 0. | |
1036 | */ | |
1037 | if (vm_srb->srb_status != SRB_STATUS_DATA_OVERRUN) | |
1038 | data_transfer_length = 0; | |
1039 | } | |
c50bd448 | 1040 | |
2707388c | 1041 | scsi_set_resid(scmnd, |
40630f46 | 1042 | cmd_request->payload->range.len - data_transfer_length); |
2707388c | 1043 | |
ead3700d | 1044 | scmnd->scsi_done(scmnd); |
be0cf6ca S |
1045 | |
1046 | if (payload_sz > | |
1047 | sizeof(struct vmbus_channel_packet_multipage_buffer)) | |
1048 | kfree(payload); | |
2707388c S |
1049 | } |
1050 | ||
03996f20 | 1051 | static void storvsc_on_io_completion(struct storvsc_device *stor_device, |
2707388c | 1052 | struct vstor_packet *vstor_packet, |
61eaffc9 | 1053 | struct storvsc_cmd_request *request) |
2707388c | 1054 | { |
2707388c | 1055 | struct vstor_packet *stor_pkt; |
03996f20 | 1056 | struct hv_device *device = stor_device->device; |
2707388c | 1057 | |
2707388c S |
1058 | stor_pkt = &request->vstor_packet; |
1059 | ||
1060 | /* | |
1061 | * The current SCSI handling on the host side does | |
1062 | * not correctly handle: | |
1063 | * INQUIRY command with page code parameter set to 0x80 | |
1064 | * MODE_SENSE command with cmd[2] == 0x1c | |
1065 | * | |
1066 | * Setup srb and scsi status so this won't be fatal. | |
1067 | * We do this so we can distinguish truly fatal failues | |
4ed51a21 S |
1068 | * (srb status == 0x4) and off-line the device in that case. |
1069 | */ | |
1070 | ||
1071 | if ((stor_pkt->vm_srb.cdb[0] == INQUIRY) || | |
a8c18c57 | 1072 | (stor_pkt->vm_srb.cdb[0] == MODE_SENSE)) { |
4ed51a21 | 1073 | vstor_packet->vm_srb.scsi_status = 0; |
16046320 | 1074 | vstor_packet->vm_srb.srb_status = SRB_STATUS_SUCCESS; |
4ed51a21 S |
1075 | } |
1076 | ||
8dcf37d4 S |
1077 | |
1078 | /* Copy over the status...etc */ | |
1079 | stor_pkt->vm_srb.scsi_status = vstor_packet->vm_srb.scsi_status; | |
1080 | stor_pkt->vm_srb.srb_status = vstor_packet->vm_srb.srb_status; | |
1081 | stor_pkt->vm_srb.sense_info_length = | |
1082 | vstor_packet->vm_srb.sense_info_length; | |
1083 | ||
f8aea701 LL |
1084 | if (vstor_packet->vm_srb.scsi_status != 0 || |
1085 | vstor_packet->vm_srb.srb_status != SRB_STATUS_SUCCESS) | |
1086 | storvsc_log(device, STORVSC_LOGGING_WARN, | |
1087 | "cmd 0x%x scsi status 0x%x srb status 0x%x\n", | |
1088 | stor_pkt->vm_srb.cdb[0], | |
1089 | vstor_packet->vm_srb.scsi_status, | |
1090 | vstor_packet->vm_srb.srb_status); | |
8dcf37d4 S |
1091 | |
1092 | if ((vstor_packet->vm_srb.scsi_status & 0xFF) == 0x02) { | |
1093 | /* CHECK_CONDITION */ | |
16046320 S |
1094 | if (vstor_packet->vm_srb.srb_status & |
1095 | SRB_STATUS_AUTOSENSE_VALID) { | |
8dcf37d4 | 1096 | /* autosense data available */ |
8dcf37d4 | 1097 | |
f8aea701 LL |
1098 | storvsc_log(device, STORVSC_LOGGING_WARN, |
1099 | "stor pkt %p autosense data valid - len %d\n", | |
1100 | request, vstor_packet->vm_srb.sense_info_length); | |
1101 | ||
ead3700d | 1102 | memcpy(request->cmd->sense_buffer, |
8dcf37d4 S |
1103 | vstor_packet->vm_srb.sense_data, |
1104 | vstor_packet->vm_srb.sense_info_length); | |
1105 | ||
1106 | } | |
1107 | } | |
1108 | ||
1109 | stor_pkt->vm_srb.data_transfer_length = | |
1110 | vstor_packet->vm_srb.data_transfer_length; | |
1111 | ||
03996f20 | 1112 | storvsc_command_completion(request, stor_device); |
8dcf37d4 S |
1113 | |
1114 | if (atomic_dec_and_test(&stor_device->num_outstanding_req) && | |
1115 | stor_device->drain_notify) | |
1116 | wake_up(&stor_device->waiting_to_drain); | |
1117 | ||
1118 | ||
1119 | } | |
1120 | ||
03996f20 | 1121 | static void storvsc_on_receive(struct storvsc_device *stor_device, |
8dcf37d4 | 1122 | struct vstor_packet *vstor_packet, |
61eaffc9 | 1123 | struct storvsc_cmd_request *request) |
8dcf37d4 | 1124 | { |
c58cc70f | 1125 | struct hv_host_device *host_dev; |
8dcf37d4 S |
1126 | switch (vstor_packet->operation) { |
1127 | case VSTOR_OPERATION_COMPLETE_IO: | |
03996f20 | 1128 | storvsc_on_io_completion(stor_device, vstor_packet, request); |
8dcf37d4 | 1129 | break; |
12675799 | 1130 | |
8dcf37d4 | 1131 | case VSTOR_OPERATION_REMOVE_DEVICE: |
12675799 | 1132 | case VSTOR_OPERATION_ENUMERATE_BUS: |
c58cc70f LL |
1133 | host_dev = shost_priv(stor_device->host); |
1134 | queue_work( | |
1135 | host_dev->handle_error_wq, &host_dev->host_scan_work); | |
12675799 | 1136 | break; |
8dcf37d4 | 1137 | |
dac58241 | 1138 | case VSTOR_OPERATION_FCHBA_DATA: |
dac58241 S |
1139 | cache_wwn(stor_device, vstor_packet); |
1140 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) | |
1141 | fc_host_node_name(stor_device->host) = stor_device->node_name; | |
1142 | fc_host_port_name(stor_device->host) = stor_device->port_name; | |
1143 | #endif | |
1144 | break; | |
8dcf37d4 S |
1145 | default: |
1146 | break; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | static void storvsc_on_channel_callback(void *context) | |
1151 | { | |
6f94d5de | 1152 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
ddccd952 | 1153 | const struct vmpacket_descriptor *desc; |
6f94d5de | 1154 | struct hv_device *device; |
8dcf37d4 | 1155 | struct storvsc_device *stor_device; |
8dcf37d4 | 1156 | |
6f94d5de S |
1157 | if (channel->primary_channel != NULL) |
1158 | device = channel->primary_channel->device_obj; | |
1159 | else | |
1160 | device = channel->device_obj; | |
8dcf37d4 S |
1161 | |
1162 | stor_device = get_in_stor_device(device); | |
1163 | if (!stor_device) | |
1164 | return; | |
1165 | ||
ddccd952 SH |
1166 | foreach_vmbus_pkt(desc, channel) { |
1167 | void *packet = hv_pkt_data(desc); | |
1168 | struct storvsc_cmd_request *request; | |
1169 | ||
1170 | request = (struct storvsc_cmd_request *) | |
1171 | ((unsigned long)desc->trans_id); | |
1172 | ||
1173 | if (request == &stor_device->init_request || | |
1174 | request == &stor_device->reset_request) { | |
1175 | memcpy(&request->vstor_packet, packet, | |
1176 | (sizeof(struct vstor_packet) - vmscsi_size_delta)); | |
1177 | complete(&request->wait_event); | |
8dcf37d4 | 1178 | } else { |
ddccd952 | 1179 | storvsc_on_receive(stor_device, packet, request); |
8dcf37d4 | 1180 | } |
ddccd952 | 1181 | } |
8dcf37d4 S |
1182 | } |
1183 | ||
dac58241 S |
1184 | static int storvsc_connect_to_vsp(struct hv_device *device, u32 ring_size, |
1185 | bool is_fc) | |
8dcf37d4 S |
1186 | { |
1187 | struct vmstorage_channel_properties props; | |
1188 | int ret; | |
1189 | ||
1190 | memset(&props, 0, sizeof(struct vmstorage_channel_properties)); | |
1191 | ||
8dcf37d4 S |
1192 | ret = vmbus_open(device->channel, |
1193 | ring_size, | |
1194 | ring_size, | |
1195 | (void *)&props, | |
1196 | sizeof(struct vmstorage_channel_properties), | |
6f94d5de | 1197 | storvsc_on_channel_callback, device->channel); |
8dcf37d4 S |
1198 | |
1199 | if (ret != 0) | |
1200 | return ret; | |
1201 | ||
dac58241 | 1202 | ret = storvsc_channel_init(device, is_fc); |
8dcf37d4 S |
1203 | |
1204 | return ret; | |
1205 | } | |
1206 | ||
c1b3d067 | 1207 | static int storvsc_dev_remove(struct hv_device *device) |
8dcf37d4 S |
1208 | { |
1209 | struct storvsc_device *stor_device; | |
8dcf37d4 | 1210 | |
cd654ea1 | 1211 | stor_device = hv_get_drvdata(device); |
8dcf37d4 | 1212 | |
8dcf37d4 | 1213 | stor_device->destroy = true; |
2371cd90 SH |
1214 | |
1215 | /* Make sure flag is set before waiting */ | |
1216 | wmb(); | |
8dcf37d4 S |
1217 | |
1218 | /* | |
1219 | * At this point, all outbound traffic should be disable. We | |
1220 | * only allow inbound traffic (responses) to proceed so that | |
1221 | * outstanding requests can be completed. | |
1222 | */ | |
1223 | ||
1224 | storvsc_wait_to_drain(stor_device); | |
1225 | ||
1226 | /* | |
1227 | * Since we have already drained, we don't need to busy wait | |
1228 | * as was done in final_release_stor_device() | |
1229 | * Note that we cannot set the ext pointer to NULL until | |
1230 | * we have drained - to drain the outgoing packets, we need to | |
1231 | * allow incoming packets. | |
1232 | */ | |
cd654ea1 | 1233 | hv_set_drvdata(device, NULL); |
8dcf37d4 S |
1234 | |
1235 | /* Close the channel */ | |
1236 | vmbus_close(device->channel); | |
1237 | ||
d86adf48 | 1238 | kfree(stor_device->stor_chns); |
8dcf37d4 S |
1239 | kfree(stor_device); |
1240 | return 0; | |
1241 | } | |
1242 | ||
d86adf48 S |
1243 | static struct vmbus_channel *get_og_chn(struct storvsc_device *stor_device, |
1244 | u16 q_num) | |
1245 | { | |
1246 | u16 slot = 0; | |
1247 | u16 hash_qnum; | |
1b25a8c4 | 1248 | const struct cpumask *node_mask; |
d86adf48 S |
1249 | int num_channels, tgt_cpu; |
1250 | ||
1251 | if (stor_device->num_sc == 0) | |
1252 | return stor_device->device->channel; | |
1253 | ||
1254 | /* | |
1255 | * Our channel array is sparsley populated and we | |
1256 | * initiated I/O on a processor/hw-q that does not | |
1257 | * currently have a designated channel. Fix this. | |
1258 | * The strategy is simple: | |
1259 | * I. Ensure NUMA locality | |
1260 | * II. Distribute evenly (best effort) | |
1261 | * III. Mapping is persistent. | |
1262 | */ | |
1263 | ||
1b25a8c4 | 1264 | node_mask = cpumask_of_node(cpu_to_node(q_num)); |
d86adf48 | 1265 | |
1b25a8c4 MK |
1266 | num_channels = 0; |
1267 | for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { | |
1268 | if (cpumask_test_cpu(tgt_cpu, node_mask)) | |
1269 | num_channels++; | |
1270 | } | |
d86adf48 S |
1271 | if (num_channels == 0) |
1272 | return stor_device->device->channel; | |
1273 | ||
1274 | hash_qnum = q_num; | |
1275 | while (hash_qnum >= num_channels) | |
1276 | hash_qnum -= num_channels; | |
1277 | ||
1b25a8c4 MK |
1278 | for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { |
1279 | if (!cpumask_test_cpu(tgt_cpu, node_mask)) | |
1280 | continue; | |
d86adf48 S |
1281 | if (slot == hash_qnum) |
1282 | break; | |
1283 | slot++; | |
1284 | } | |
1285 | ||
1286 | stor_device->stor_chns[q_num] = stor_device->stor_chns[tgt_cpu]; | |
1287 | ||
1288 | return stor_device->stor_chns[q_num]; | |
1289 | } | |
1290 | ||
1291 | ||
c1b3d067 | 1292 | static int storvsc_do_io(struct hv_device *device, |
d86adf48 | 1293 | struct storvsc_cmd_request *request, u16 q_num) |
8dcf37d4 S |
1294 | { |
1295 | struct storvsc_device *stor_device; | |
1296 | struct vstor_packet *vstor_packet; | |
2217a47d | 1297 | struct vmbus_channel *outgoing_channel, *channel; |
8dcf37d4 | 1298 | int ret = 0; |
1b25a8c4 | 1299 | const struct cpumask *node_mask; |
d86adf48 | 1300 | int tgt_cpu; |
8dcf37d4 S |
1301 | |
1302 | vstor_packet = &request->vstor_packet; | |
1303 | stor_device = get_out_stor_device(device); | |
1304 | ||
1305 | if (!stor_device) | |
1306 | return -ENODEV; | |
1307 | ||
1308 | ||
1309 | request->device = device; | |
6f94d5de S |
1310 | /* |
1311 | * Select an an appropriate channel to send the request out. | |
1312 | */ | |
d86adf48 S |
1313 | if (stor_device->stor_chns[q_num] != NULL) { |
1314 | outgoing_channel = stor_device->stor_chns[q_num]; | |
2217a47d | 1315 | if (outgoing_channel->target_cpu == q_num) { |
d86adf48 S |
1316 | /* |
1317 | * Ideally, we want to pick a different channel if | |
1318 | * available on the same NUMA node. | |
1319 | */ | |
1b25a8c4 MK |
1320 | node_mask = cpumask_of_node(cpu_to_node(q_num)); |
1321 | for_each_cpu_wrap(tgt_cpu, | |
1322 | &stor_device->alloced_cpus, q_num + 1) { | |
1323 | if (!cpumask_test_cpu(tgt_cpu, node_mask)) | |
1324 | continue; | |
2217a47d LL |
1325 | if (tgt_cpu == q_num) |
1326 | continue; | |
1327 | channel = stor_device->stor_chns[tgt_cpu]; | |
1328 | if (hv_get_avail_to_write_percent( | |
1329 | &channel->outbound) | |
1330 | > ring_avail_percent_lowater) { | |
1331 | outgoing_channel = channel; | |
1332 | goto found_channel; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * All the other channels on the same NUMA node are | |
1338 | * busy. Try to use the channel on the current CPU | |
1339 | */ | |
1340 | if (hv_get_avail_to_write_percent( | |
1341 | &outgoing_channel->outbound) | |
1342 | > ring_avail_percent_lowater) | |
1343 | goto found_channel; | |
1344 | ||
1345 | /* | |
1346 | * If we reach here, all the channels on the current | |
1347 | * NUMA node are busy. Try to find a channel in | |
1348 | * other NUMA nodes | |
1349 | */ | |
1b25a8c4 MK |
1350 | for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { |
1351 | if (cpumask_test_cpu(tgt_cpu, node_mask)) | |
1352 | continue; | |
2217a47d LL |
1353 | channel = stor_device->stor_chns[tgt_cpu]; |
1354 | if (hv_get_avail_to_write_percent( | |
1355 | &channel->outbound) | |
1356 | > ring_avail_percent_lowater) { | |
1357 | outgoing_channel = channel; | |
1358 | goto found_channel; | |
d86adf48 S |
1359 | } |
1360 | } | |
1361 | } | |
1362 | } else { | |
1363 | outgoing_channel = get_og_chn(stor_device, q_num); | |
1364 | } | |
8dcf37d4 | 1365 | |
2217a47d | 1366 | found_channel: |
8dcf37d4 S |
1367 | vstor_packet->flags |= REQUEST_COMPLETION_FLAG; |
1368 | ||
8b612fa2 S |
1369 | vstor_packet->vm_srb.length = (sizeof(struct vmscsi_request) - |
1370 | vmscsi_size_delta); | |
8dcf37d4 S |
1371 | |
1372 | ||
8b612fa2 | 1373 | vstor_packet->vm_srb.sense_info_length = sense_buffer_size; |
8dcf37d4 S |
1374 | |
1375 | ||
1376 | vstor_packet->vm_srb.data_transfer_length = | |
be0cf6ca | 1377 | request->payload->range.len; |
8dcf37d4 S |
1378 | |
1379 | vstor_packet->operation = VSTOR_OPERATION_EXECUTE_SRB; | |
1380 | ||
be0cf6ca S |
1381 | if (request->payload->range.len) { |
1382 | ||
1383 | ret = vmbus_sendpacket_mpb_desc(outgoing_channel, | |
1384 | request->payload, request->payload_sz, | |
8dcf37d4 | 1385 | vstor_packet, |
8b612fa2 S |
1386 | (sizeof(struct vstor_packet) - |
1387 | vmscsi_size_delta), | |
8dcf37d4 S |
1388 | (unsigned long)request); |
1389 | } else { | |
0147dabc | 1390 | ret = vmbus_sendpacket(outgoing_channel, vstor_packet, |
8b612fa2 S |
1391 | (sizeof(struct vstor_packet) - |
1392 | vmscsi_size_delta), | |
8dcf37d4 S |
1393 | (unsigned long)request, |
1394 | VM_PKT_DATA_INBAND, | |
1395 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1396 | } | |
1397 | ||
1398 | if (ret != 0) | |
1399 | return ret; | |
1400 | ||
1401 | atomic_inc(&stor_device->num_outstanding_req); | |
1402 | ||
1403 | return ret; | |
1404 | } | |
1405 | ||
f1c635b4 SH |
1406 | static int storvsc_device_alloc(struct scsi_device *sdevice) |
1407 | { | |
1408 | /* | |
1409 | * Set blist flag to permit the reading of the VPD pages even when | |
1410 | * the target may claim SPC-2 compliance. MSFT targets currently | |
1411 | * claim SPC-2 compliance while they implement post SPC-2 features. | |
1412 | * With this flag we can correctly handle WRITE_SAME_16 issues. | |
1413 | * | |
1414 | * Hypervisor reports SCSI_UNKNOWN type for DVD ROM device but | |
1415 | * still supports REPORT LUN. | |
1416 | */ | |
1417 | sdevice->sdev_bflags = BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES; | |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | ||
419f2d03 S |
1422 | static int storvsc_device_configure(struct scsi_device *sdevice) |
1423 | { | |
893def38 S |
1424 | blk_queue_rq_timeout(sdevice->request_queue, (storvsc_timeout * HZ)); |
1425 | ||
3e8f4f40 OH |
1426 | sdevice->no_write_same = 1; |
1427 | ||
b0a93d96 S |
1428 | /* |
1429 | * If the host is WIN8 or WIN8 R2, claim conformance to SPC-3 | |
b95f5be0 KM |
1430 | * if the device is a MSFT virtual device. If the host is |
1431 | * WIN10 or newer, allow write_same. | |
b0a93d96 S |
1432 | */ |
1433 | if (!strncmp(sdevice->vendor, "Msft", 4)) { | |
e6c4bc66 KM |
1434 | switch (vmstor_proto_version) { |
1435 | case VMSTOR_PROTO_VERSION_WIN8: | |
1436 | case VMSTOR_PROTO_VERSION_WIN8_1: | |
b0a93d96 S |
1437 | sdevice->scsi_level = SCSI_SPC_3; |
1438 | break; | |
1439 | } | |
b95f5be0 KM |
1440 | |
1441 | if (vmstor_proto_version >= VMSTOR_PROTO_VERSION_WIN10) | |
1442 | sdevice->no_write_same = 0; | |
b0a93d96 S |
1443 | } |
1444 | ||
419f2d03 S |
1445 | return 0; |
1446 | } | |
1447 | ||
62838ce2 S |
1448 | static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, |
1449 | sector_t capacity, int *info) | |
1450 | { | |
5326fd5c S |
1451 | sector_t nsect = capacity; |
1452 | sector_t cylinders = nsect; | |
1453 | int heads, sectors_pt; | |
62838ce2 | 1454 | |
5326fd5c S |
1455 | /* |
1456 | * We are making up these values; let us keep it simple. | |
1457 | */ | |
1458 | heads = 0xff; | |
1459 | sectors_pt = 0x3f; /* Sectors per track */ | |
1460 | sector_div(cylinders, heads * sectors_pt); | |
1461 | if ((sector_t)(cylinders + 1) * heads * sectors_pt < nsect) | |
1462 | cylinders = 0xffff; | |
62838ce2 S |
1463 | |
1464 | info[0] = heads; | |
5326fd5c S |
1465 | info[1] = sectors_pt; |
1466 | info[2] = (int)cylinders; | |
62838ce2 | 1467 | |
62838ce2 S |
1468 | return 0; |
1469 | } | |
aa3d789e | 1470 | |
4b270c8b | 1471 | static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) |
aa3d789e | 1472 | { |
4b270c8b S |
1473 | struct hv_host_device *host_dev = shost_priv(scmnd->device->host); |
1474 | struct hv_device *device = host_dev->dev; | |
1475 | ||
aa3d789e | 1476 | struct storvsc_device *stor_device; |
61eaffc9 | 1477 | struct storvsc_cmd_request *request; |
aa3d789e S |
1478 | struct vstor_packet *vstor_packet; |
1479 | int ret, t; | |
1480 | ||
aa3d789e | 1481 | |
1eaaddf9 | 1482 | stor_device = get_out_stor_device(device); |
aa3d789e | 1483 | if (!stor_device) |
a00e8224 | 1484 | return FAILED; |
aa3d789e S |
1485 | |
1486 | request = &stor_device->reset_request; | |
1487 | vstor_packet = &request->vstor_packet; | |
1488 | ||
1489 | init_completion(&request->wait_event); | |
1490 | ||
1491 | vstor_packet->operation = VSTOR_OPERATION_RESET_BUS; | |
1492 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
1493 | vstor_packet->vm_srb.path_id = stor_device->path_id; | |
1494 | ||
1495 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
8b612fa2 S |
1496 | (sizeof(struct vstor_packet) - |
1497 | vmscsi_size_delta), | |
aa3d789e S |
1498 | (unsigned long)&stor_device->reset_request, |
1499 | VM_PKT_DATA_INBAND, | |
1500 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1501 | if (ret != 0) | |
a00e8224 | 1502 | return FAILED; |
aa3d789e | 1503 | |
46d2eb6d | 1504 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
a00e8224 S |
1505 | if (t == 0) |
1506 | return TIMEOUT_ERROR; | |
aa3d789e | 1507 | |
aa3d789e S |
1508 | |
1509 | /* | |
1510 | * At this point, all outstanding requests in the adapter | |
1511 | * should have been flushed out and return to us | |
5c1b10ab S |
1512 | * There is a potential race here where the host may be in |
1513 | * the process of responding when we return from here. | |
1514 | * Just wait for all in-transit packets to be accounted for | |
1515 | * before we return from here. | |
aa3d789e | 1516 | */ |
5c1b10ab | 1517 | storvsc_wait_to_drain(stor_device); |
aa3d789e | 1518 | |
a00e8224 | 1519 | return SUCCESS; |
aa3d789e S |
1520 | } |
1521 | ||
56b26e69 S |
1522 | /* |
1523 | * The host guarantees to respond to each command, although I/O latencies might | |
1524 | * be unbounded on Azure. Reset the timer unconditionally to give the host a | |
1525 | * chance to perform EH. | |
1526 | */ | |
1527 | static enum blk_eh_timer_return storvsc_eh_timed_out(struct scsi_cmnd *scmnd) | |
1528 | { | |
3930d730 LL |
1529 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
1530 | if (scmnd->device->host->transportt == fc_transport_template) | |
1531 | return fc_eh_timed_out(scmnd); | |
1532 | #endif | |
56b26e69 S |
1533 | return BLK_EH_RESET_TIMER; |
1534 | } | |
1535 | ||
c77b63b6 | 1536 | static bool storvsc_scsi_cmd_ok(struct scsi_cmnd *scmnd) |
92ae4ebd OH |
1537 | { |
1538 | bool allowed = true; | |
1539 | u8 scsi_op = scmnd->cmnd[0]; | |
1540 | ||
1541 | switch (scsi_op) { | |
3e8f4f40 OH |
1542 | /* the host does not handle WRITE_SAME, log accident usage */ |
1543 | case WRITE_SAME: | |
c77b63b6 S |
1544 | /* |
1545 | * smartd sends this command and the host does not handle | |
1546 | * this. So, don't send it. | |
1547 | */ | |
41098f8f | 1548 | case SET_WINDOW: |
59e00e74 | 1549 | scmnd->result = ILLEGAL_REQUEST << 16; |
41098f8f S |
1550 | allowed = false; |
1551 | break; | |
1552 | default: | |
1553 | break; | |
92ae4ebd OH |
1554 | } |
1555 | return allowed; | |
1556 | } | |
c5b463ae | 1557 | |
bab445e1 | 1558 | static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) |
c5b463ae S |
1559 | { |
1560 | int ret; | |
bab445e1 | 1561 | struct hv_host_device *host_dev = shost_priv(host); |
c5b463ae | 1562 | struct hv_device *dev = host_dev->dev; |
ead3700d | 1563 | struct storvsc_cmd_request *cmd_request = scsi_cmd_priv(scmnd); |
c5b463ae S |
1564 | int i; |
1565 | struct scatterlist *sgl; | |
1566 | unsigned int sg_count = 0; | |
1567 | struct vmscsi_request *vm_srb; | |
aaced993 | 1568 | struct scatterlist *cur_sgl; |
be0cf6ca S |
1569 | struct vmbus_packet_mpb_array *payload; |
1570 | u32 payload_sz; | |
1571 | u32 length; | |
c5b463ae | 1572 | |
2492fd7a | 1573 | if (vmstor_proto_version <= VMSTOR_PROTO_VERSION_WIN8) { |
8caf92d8 S |
1574 | /* |
1575 | * On legacy hosts filter unimplemented commands. | |
1576 | * Future hosts are expected to correctly handle | |
1577 | * unsupported commands. Furthermore, it is | |
1578 | * possible that some of the currently | |
1579 | * unsupported commands maybe supported in | |
1580 | * future versions of the host. | |
1581 | */ | |
1582 | if (!storvsc_scsi_cmd_ok(scmnd)) { | |
1583 | scmnd->scsi_done(scmnd); | |
1584 | return 0; | |
1585 | } | |
92ae4ebd | 1586 | } |
c5b463ae | 1587 | |
c5b463ae | 1588 | /* Setup the cmd request */ |
c5b463ae S |
1589 | cmd_request->cmd = scmnd; |
1590 | ||
61eaffc9 | 1591 | vm_srb = &cmd_request->vstor_packet.vm_srb; |
8b612fa2 | 1592 | vm_srb->win8_extension.time_out_value = 60; |
c5b463ae | 1593 | |
f885fb73 | 1594 | vm_srb->win8_extension.srb_flags |= |
8cf308e1 | 1595 | SRB_FLAGS_DISABLE_SYNCH_TRANSFER; |
c5b463ae | 1596 | |
3cd6d3d9 LL |
1597 | if (scmnd->device->tagged_supported) { |
1598 | vm_srb->win8_extension.srb_flags |= | |
1599 | (SRB_FLAGS_QUEUE_ACTION_ENABLE | SRB_FLAGS_NO_QUEUE_FREEZE); | |
1600 | vm_srb->win8_extension.queue_tag = SP_UNTAGGED; | |
1601 | vm_srb->win8_extension.queue_action = SRB_SIMPLE_TAG_REQUEST; | |
1602 | } | |
1603 | ||
c5b463ae S |
1604 | /* Build the SRB */ |
1605 | switch (scmnd->sc_data_direction) { | |
1606 | case DMA_TO_DEVICE: | |
1607 | vm_srb->data_in = WRITE_TYPE; | |
8b612fa2 | 1608 | vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_OUT; |
c5b463ae S |
1609 | break; |
1610 | case DMA_FROM_DEVICE: | |
1611 | vm_srb->data_in = READ_TYPE; | |
8b612fa2 | 1612 | vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_IN; |
c5b463ae | 1613 | break; |
cb1cf080 | 1614 | case DMA_NONE: |
c5b463ae | 1615 | vm_srb->data_in = UNKNOWN_TYPE; |
dc45708c | 1616 | vm_srb->win8_extension.srb_flags |= SRB_FLAGS_NO_DATA_TRANSFER; |
c5b463ae | 1617 | break; |
cb1cf080 VK |
1618 | default: |
1619 | /* | |
1620 | * This is DMA_BIDIRECTIONAL or something else we are never | |
1621 | * supposed to see here. | |
1622 | */ | |
1623 | WARN(1, "Unexpected data direction: %d\n", | |
1624 | scmnd->sc_data_direction); | |
1625 | return -EINVAL; | |
c5b463ae S |
1626 | } |
1627 | ||
c5b463ae | 1628 | |
c5b463ae S |
1629 | vm_srb->port_number = host_dev->port; |
1630 | vm_srb->path_id = scmnd->device->channel; | |
1631 | vm_srb->target_id = scmnd->device->id; | |
1632 | vm_srb->lun = scmnd->device->lun; | |
1633 | ||
c5b463ae S |
1634 | vm_srb->cdb_length = scmnd->cmd_len; |
1635 | ||
1636 | memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length); | |
1637 | ||
be0cf6ca S |
1638 | sgl = (struct scatterlist *)scsi_sglist(scmnd); |
1639 | sg_count = scsi_sg_count(scmnd); | |
c5b463ae | 1640 | |
be0cf6ca S |
1641 | length = scsi_bufflen(scmnd); |
1642 | payload = (struct vmbus_packet_mpb_array *)&cmd_request->mpb; | |
1643 | payload_sz = sizeof(cmd_request->mpb); | |
1644 | ||
1645 | if (sg_count) { | |
be0cf6ca S |
1646 | if (sg_count > MAX_PAGE_BUFFER_COUNT) { |
1647 | ||
b0120d99 | 1648 | payload_sz = (sg_count * sizeof(u64) + |
be0cf6ca | 1649 | sizeof(struct vmbus_packet_mpb_array)); |
b0120d99 | 1650 | payload = kzalloc(payload_sz, GFP_ATOMIC); |
81988a0e VK |
1651 | if (!payload) |
1652 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
be0cf6ca S |
1653 | } |
1654 | ||
1655 | payload->range.len = length; | |
1656 | payload->range.offset = sgl[0].offset; | |
1657 | ||
aaced993 S |
1658 | cur_sgl = sgl; |
1659 | for (i = 0; i < sg_count; i++) { | |
be0cf6ca | 1660 | payload->range.pfn_array[i] = |
aaced993 S |
1661 | page_to_pfn(sg_page((cur_sgl))); |
1662 | cur_sgl = sg_next(cur_sgl); | |
1663 | } | |
c5b463ae S |
1664 | } |
1665 | ||
be0cf6ca S |
1666 | cmd_request->payload = payload; |
1667 | cmd_request->payload_sz = payload_sz; | |
1668 | ||
c5b463ae | 1669 | /* Invokes the vsc to start an IO */ |
d86adf48 S |
1670 | ret = storvsc_do_io(dev, cmd_request, get_cpu()); |
1671 | put_cpu(); | |
636f0fd1 | 1672 | |
d2598f01 | 1673 | if (ret == -EAGAIN) { |
0208eeaa LL |
1674 | if (payload_sz > sizeof(cmd_request->mpb)) |
1675 | kfree(payload); | |
c5b463ae | 1676 | /* no more space */ |
ead3700d | 1677 | return SCSI_MLQUEUE_DEVICE_BUSY; |
c5b463ae S |
1678 | } |
1679 | ||
c77b63b6 | 1680 | return 0; |
c5b463ae S |
1681 | } |
1682 | ||
bef4a34a | 1683 | static struct scsi_host_template scsi_driver = { |
ff568d3a GKH |
1684 | .module = THIS_MODULE, |
1685 | .name = "storvsc_host_t", | |
ead3700d | 1686 | .cmd_size = sizeof(struct storvsc_cmd_request), |
ff568d3a GKH |
1687 | .bios_param = storvsc_get_chs, |
1688 | .queuecommand = storvsc_queuecommand, | |
1689 | .eh_host_reset_handler = storvsc_host_reset_handler, | |
ead3700d | 1690 | .proc_name = "storvsc_host", |
56b26e69 | 1691 | .eh_timed_out = storvsc_eh_timed_out, |
f1c635b4 | 1692 | .slave_alloc = storvsc_device_alloc, |
ff568d3a | 1693 | .slave_configure = storvsc_device_configure, |
cabe92a5 | 1694 | .cmd_per_lun = 2048, |
ff568d3a | 1695 | .this_id = -1, |
454f18a9 | 1696 | /* Make sure we dont get a sg segment crosses a page boundary */ |
ff568d3a | 1697 | .dma_boundary = PAGE_SIZE-1, |
83eed459 CH |
1698 | /* Ensure there are no gaps in presented sgls */ |
1699 | .virt_boundary_mask = PAGE_SIZE-1, | |
54b2b50c | 1700 | .no_write_same = 1, |
f64dad26 | 1701 | .track_queue_depth = 1, |
adfbd028 | 1702 | .change_queue_depth = storvsc_change_queue_depth, |
bef4a34a HJ |
1703 | }; |
1704 | ||
ef52a81b S |
1705 | enum { |
1706 | SCSI_GUID, | |
1707 | IDE_GUID, | |
bde6d0f9 | 1708 | SFC_GUID, |
ef52a81b S |
1709 | }; |
1710 | ||
d847b5fe | 1711 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1712 | /* SCSI guid */ |
35c3bc20 S |
1713 | { HV_SCSI_GUID, |
1714 | .driver_data = SCSI_GUID | |
1715 | }, | |
21e37742 | 1716 | /* IDE guid */ |
35c3bc20 S |
1717 | { HV_IDE_GUID, |
1718 | .driver_data = IDE_GUID | |
1719 | }, | |
bde6d0f9 S |
1720 | /* Fibre Channel GUID */ |
1721 | { | |
1722 | HV_SYNTHFC_GUID, | |
1723 | .driver_data = SFC_GUID | |
1724 | }, | |
c45cf2d4 | 1725 | { }, |
d847b5fe | 1726 | }; |
bef4a34a | 1727 | |
d847b5fe | 1728 | MODULE_DEVICE_TABLE(vmbus, id_table); |
bd1f5d6a | 1729 | |
56fb1058 DC |
1730 | static const struct { guid_t guid; } fc_guid = { HV_SYNTHFC_GUID }; |
1731 | ||
1732 | static bool hv_dev_is_fc(struct hv_device *hv_dev) | |
1733 | { | |
1734 | return guid_equal(&fc_guid.guid, &hv_dev->dev_type); | |
1735 | } | |
1736 | ||
84946899 S |
1737 | static int storvsc_probe(struct hv_device *device, |
1738 | const struct hv_vmbus_device_id *dev_id) | |
bef4a34a | 1739 | { |
ff568d3a | 1740 | int ret; |
f458aada | 1741 | int num_cpus = num_online_cpus(); |
bef4a34a | 1742 | struct Scsi_Host *host; |
795b613d | 1743 | struct hv_host_device *host_dev; |
ef52a81b | 1744 | bool dev_is_ide = ((dev_id->driver_data == IDE_GUID) ? true : false); |
dac58241 | 1745 | bool is_fc = ((dev_id->driver_data == SFC_GUID) ? true : false); |
bd1f5d6a | 1746 | int target = 0; |
6e4198ce | 1747 | struct storvsc_device *stor_device; |
0fb8db29 S |
1748 | int max_luns_per_target; |
1749 | int max_targets; | |
1750 | int max_channels; | |
f458aada | 1751 | int max_sub_channels = 0; |
bd1f5d6a | 1752 | |
8b612fa2 S |
1753 | /* |
1754 | * Based on the windows host we are running on, | |
1755 | * set state to properly communicate with the host. | |
1756 | */ | |
1757 | ||
6ee5c615 | 1758 | if (vmbus_proto_version < VERSION_WIN8) { |
0fb8db29 S |
1759 | max_luns_per_target = STORVSC_IDE_MAX_LUNS_PER_TARGET; |
1760 | max_targets = STORVSC_IDE_MAX_TARGETS; | |
1761 | max_channels = STORVSC_IDE_MAX_CHANNELS; | |
6ee5c615 | 1762 | } else { |
0fb8db29 S |
1763 | max_luns_per_target = STORVSC_MAX_LUNS_PER_TARGET; |
1764 | max_targets = STORVSC_MAX_TARGETS; | |
1765 | max_channels = STORVSC_MAX_CHANNELS; | |
f458aada | 1766 | /* |
f286299c LL |
1767 | * On Windows8 and above, we support sub-channels for storage |
1768 | * on SCSI and FC controllers. | |
f458aada S |
1769 | * The number of sub-channels offerred is based on the number of |
1770 | * VCPUs in the guest. | |
1771 | */ | |
f286299c LL |
1772 | if (!dev_is_ide) |
1773 | max_sub_channels = | |
1774 | (num_cpus - 1) / storvsc_vcpus_per_sub_channel; | |
8b612fa2 S |
1775 | } |
1776 | ||
2217a47d LL |
1777 | scsi_driver.can_queue = max_outstanding_req_per_channel * |
1778 | (max_sub_channels + 1) * | |
1779 | (100 - ring_avail_percent_lowater) / 100; | |
f458aada | 1780 | |
ff568d3a | 1781 | host = scsi_host_alloc(&scsi_driver, |
972621c9 | 1782 | sizeof(struct hv_host_device)); |
f8feed06 | 1783 | if (!host) |
bef4a34a | 1784 | return -ENOMEM; |
bef4a34a | 1785 | |
7f33f30a | 1786 | host_dev = shost_priv(host); |
795b613d | 1787 | memset(host_dev, 0, sizeof(struct hv_host_device)); |
bef4a34a | 1788 | |
795b613d | 1789 | host_dev->port = host->host_no; |
97c15296 | 1790 | host_dev->dev = device; |
c58cc70f | 1791 | host_dev->host = host; |
bef4a34a | 1792 | |
4e03e697 | 1793 | |
a13d35ab | 1794 | stor_device = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL); |
6e4198ce | 1795 | if (!stor_device) { |
225ce6ea | 1796 | ret = -ENOMEM; |
ce3e301c | 1797 | goto err_out0; |
6e4198ce | 1798 | } |
9efd21e1 | 1799 | |
a13d35ab S |
1800 | stor_device->destroy = false; |
1801 | init_waitqueue_head(&stor_device->waiting_to_drain); | |
1802 | stor_device->device = device; | |
cd654ea1 S |
1803 | stor_device->host = host; |
1804 | hv_set_drvdata(device, stor_device); | |
a13d35ab | 1805 | |
6e4198ce | 1806 | stor_device->port_number = host->host_no; |
dac58241 | 1807 | ret = storvsc_connect_to_vsp(device, storvsc_ringbuffer_size, is_fc); |
225ce6ea | 1808 | if (ret) |
ce3e301c | 1809 | goto err_out1; |
bef4a34a | 1810 | |
6e4198ce S |
1811 | host_dev->path = stor_device->path_id; |
1812 | host_dev->target = stor_device->target_id; | |
bef4a34a | 1813 | |
4cd83ecd S |
1814 | switch (dev_id->driver_data) { |
1815 | case SFC_GUID: | |
1816 | host->max_lun = STORVSC_FC_MAX_LUNS_PER_TARGET; | |
1817 | host->max_id = STORVSC_FC_MAX_TARGETS; | |
1818 | host->max_channel = STORVSC_FC_MAX_CHANNELS - 1; | |
dac58241 S |
1819 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
1820 | host->transportt = fc_transport_template; | |
1821 | #endif | |
4cd83ecd S |
1822 | break; |
1823 | ||
1824 | case SCSI_GUID: | |
0fb8db29 S |
1825 | host->max_lun = max_luns_per_target; |
1826 | host->max_id = max_targets; | |
1827 | host->max_channel = max_channels - 1; | |
4cd83ecd S |
1828 | break; |
1829 | ||
1830 | default: | |
1831 | host->max_lun = STORVSC_IDE_MAX_LUNS_PER_TARGET; | |
1832 | host->max_id = STORVSC_IDE_MAX_TARGETS; | |
1833 | host->max_channel = STORVSC_IDE_MAX_CHANNELS - 1; | |
1834 | break; | |
1835 | } | |
cf55f4a8 MS |
1836 | /* max cmd length */ |
1837 | host->max_cmd_len = STORVSC_MAX_CMD_LEN; | |
bef4a34a | 1838 | |
be0cf6ca S |
1839 | /* |
1840 | * set the table size based on the info we got | |
1841 | * from the host. | |
1842 | */ | |
1843 | host->sg_tablesize = (stor_device->max_transfer_bytes >> PAGE_SHIFT); | |
d86adf48 S |
1844 | /* |
1845 | * Set the number of HW queues we are supporting. | |
1846 | */ | |
0ed88102 | 1847 | host->nr_hw_queues = num_present_cpus(); |
be0cf6ca | 1848 | |
436ad941 CA |
1849 | /* |
1850 | * Set the error handler work queue. | |
1851 | */ | |
1852 | host_dev->handle_error_wq = | |
1853 | alloc_ordered_workqueue("storvsc_error_wq_%d", | |
1854 | WQ_MEM_RECLAIM, | |
1855 | host->host_no); | |
1856 | if (!host_dev->handle_error_wq) | |
1857 | goto err_out2; | |
c58cc70f | 1858 | INIT_WORK(&host_dev->host_scan_work, storvsc_host_scan); |
454f18a9 | 1859 | /* Register the HBA and start the scsi bus scan */ |
9efd21e1 | 1860 | ret = scsi_add_host(host, &device->device); |
bd1f5d6a | 1861 | if (ret != 0) |
436ad941 | 1862 | goto err_out3; |
bef4a34a | 1863 | |
bd1f5d6a S |
1864 | if (!dev_is_ide) { |
1865 | scsi_scan_host(host); | |
59d22950 S |
1866 | } else { |
1867 | target = (device->dev_instance.b[5] << 8 | | |
1868 | device->dev_instance.b[4]); | |
1869 | ret = scsi_add_device(host, 0, target, 0); | |
daf0cd44 | 1870 | if (ret) |
436ad941 | 1871 | goto err_out4; |
bef4a34a | 1872 | } |
dac58241 S |
1873 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
1874 | if (host->transportt == fc_transport_template) { | |
daf0cd44 CA |
1875 | struct fc_rport_identifiers ids = { |
1876 | .roles = FC_PORT_ROLE_FCP_DUMMY_INITIATOR, | |
1877 | }; | |
1878 | ||
dac58241 S |
1879 | fc_host_node_name(host) = stor_device->node_name; |
1880 | fc_host_port_name(host) = stor_device->port_name; | |
daf0cd44 | 1881 | stor_device->rport = fc_remote_port_add(host, 0, &ids); |
ca8dc694 DC |
1882 | if (!stor_device->rport) { |
1883 | ret = -ENOMEM; | |
436ad941 | 1884 | goto err_out4; |
ca8dc694 | 1885 | } |
dac58241 S |
1886 | } |
1887 | #endif | |
bd1f5d6a | 1888 | return 0; |
bef4a34a | 1889 | |
436ad941 | 1890 | err_out4: |
daf0cd44 CA |
1891 | scsi_remove_host(host); |
1892 | ||
436ad941 CA |
1893 | err_out3: |
1894 | destroy_workqueue(host_dev->handle_error_wq); | |
1895 | ||
ce3e301c | 1896 | err_out2: |
225ce6ea S |
1897 | /* |
1898 | * Once we have connected with the host, we would need to | |
1899 | * to invoke storvsc_dev_remove() to rollback this state and | |
1900 | * this call also frees up the stor_device; hence the jump around | |
ce3e301c | 1901 | * err_out1 label. |
225ce6ea | 1902 | */ |
bd1f5d6a | 1903 | storvsc_dev_remove(device); |
ce3e301c | 1904 | goto err_out0; |
225ce6ea S |
1905 | |
1906 | err_out1: | |
d86adf48 | 1907 | kfree(stor_device->stor_chns); |
ce3e301c | 1908 | kfree(stor_device); |
225ce6ea S |
1909 | |
1910 | err_out0: | |
bd1f5d6a | 1911 | scsi_host_put(host); |
225ce6ea | 1912 | return ret; |
bef4a34a HJ |
1913 | } |
1914 | ||
adfbd028 BB |
1915 | /* Change a scsi target's queue depth */ |
1916 | static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
1917 | { | |
1918 | if (queue_depth > scsi_driver.can_queue) | |
1919 | queue_depth = scsi_driver.can_queue; | |
1920 | ||
1921 | return scsi_change_queue_depth(sdev, queue_depth); | |
1922 | } | |
1923 | ||
ddcbf65e S |
1924 | static int storvsc_remove(struct hv_device *dev) |
1925 | { | |
1926 | struct storvsc_device *stor_device = hv_get_drvdata(dev); | |
1927 | struct Scsi_Host *host = stor_device->host; | |
436ad941 | 1928 | struct hv_host_device *host_dev = shost_priv(host); |
ddcbf65e | 1929 | |
dac58241 | 1930 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
daf0cd44 CA |
1931 | if (host->transportt == fc_transport_template) { |
1932 | fc_remote_port_delete(stor_device->rport); | |
dac58241 | 1933 | fc_remove_host(host); |
daf0cd44 | 1934 | } |
dac58241 | 1935 | #endif |
436ad941 | 1936 | destroy_workqueue(host_dev->handle_error_wq); |
ddcbf65e S |
1937 | scsi_remove_host(host); |
1938 | storvsc_dev_remove(dev); | |
1939 | scsi_host_put(host); | |
1940 | ||
1941 | return 0; | |
1942 | } | |
1943 | ||
56fb1058 DC |
1944 | static int storvsc_suspend(struct hv_device *hv_dev) |
1945 | { | |
1946 | struct storvsc_device *stor_device = hv_get_drvdata(hv_dev); | |
1947 | struct Scsi_Host *host = stor_device->host; | |
1948 | struct hv_host_device *host_dev = shost_priv(host); | |
1949 | ||
1950 | storvsc_wait_to_drain(stor_device); | |
1951 | ||
1952 | drain_workqueue(host_dev->handle_error_wq); | |
1953 | ||
1954 | vmbus_close(hv_dev->channel); | |
1955 | ||
1956 | memset(stor_device->stor_chns, 0, | |
1957 | num_possible_cpus() * sizeof(void *)); | |
1958 | ||
1959 | kfree(stor_device->stor_chns); | |
1960 | stor_device->stor_chns = NULL; | |
1961 | ||
1962 | cpumask_clear(&stor_device->alloced_cpus); | |
1963 | ||
1964 | return 0; | |
1965 | } | |
1966 | ||
1967 | static int storvsc_resume(struct hv_device *hv_dev) | |
1968 | { | |
1969 | int ret; | |
1970 | ||
1971 | ret = storvsc_connect_to_vsp(hv_dev, storvsc_ringbuffer_size, | |
1972 | hv_dev_is_fc(hv_dev)); | |
1973 | return ret; | |
1974 | } | |
1975 | ||
40bf63ed | 1976 | static struct hv_driver storvsc_drv = { |
fafb0efc | 1977 | .name = KBUILD_MODNAME, |
d847b5fe | 1978 | .id_table = id_table, |
40bf63ed S |
1979 | .probe = storvsc_probe, |
1980 | .remove = storvsc_remove, | |
56fb1058 DC |
1981 | .suspend = storvsc_suspend, |
1982 | .resume = storvsc_resume, | |
af0a5646 AV |
1983 | .driver = { |
1984 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, | |
1985 | }, | |
39ae6fae | 1986 | }; |
7bd05b91 | 1987 | |
dac58241 S |
1988 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
1989 | static struct fc_function_template fc_transport_functions = { | |
1990 | .show_host_node_name = 1, | |
1991 | .show_host_port_name = 1, | |
1992 | }; | |
1993 | #endif | |
1994 | ||
d9bbae83 | 1995 | static int __init storvsc_drv_init(void) |
f5c78872 | 1996 | { |
dac58241 | 1997 | int ret; |
01415ab3 S |
1998 | |
1999 | /* | |
2000 | * Divide the ring buffer data size (which is 1 page less | |
2001 | * than the ring buffer size since that page is reserved for | |
2002 | * the ring buffer indices) by the max request size (which is | |
2003 | * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64) | |
2004 | */ | |
01415ab3 | 2005 | max_outstanding_req_per_channel = |
768fa219 GKH |
2006 | ((storvsc_ringbuffer_size - PAGE_SIZE) / |
2007 | ALIGN(MAX_MULTIPAGE_BUFFER_PACKET + | |
8b612fa2 S |
2008 | sizeof(struct vstor_packet) + sizeof(u64) - |
2009 | vmscsi_size_delta, | |
768fa219 | 2010 | sizeof(u64))); |
f5c78872 | 2011 | |
dac58241 S |
2012 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
2013 | fc_transport_template = fc_attach_transport(&fc_transport_functions); | |
2014 | if (!fc_transport_template) | |
2015 | return -ENODEV; | |
2016 | #endif | |
2017 | ||
2018 | ret = vmbus_driver_register(&storvsc_drv); | |
2019 | ||
2020 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) | |
2021 | if (ret) | |
2022 | fc_release_transport(fc_transport_template); | |
2023 | #endif | |
2024 | ||
2025 | return ret; | |
f5c78872 S |
2026 | } |
2027 | ||
c63ba9e1 | 2028 | static void __exit storvsc_drv_exit(void) |
f5c78872 | 2029 | { |
768fa219 | 2030 | vmbus_driver_unregister(&storvsc_drv); |
dac58241 S |
2031 | #if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) |
2032 | fc_release_transport(fc_transport_template); | |
2033 | #endif | |
f5c78872 S |
2034 | } |
2035 | ||
ff568d3a | 2036 | MODULE_LICENSE("GPL"); |
3afc7cc3 | 2037 | MODULE_DESCRIPTION("Microsoft Hyper-V virtual storage driver"); |
d9bbae83 | 2038 | module_init(storvsc_drv_init); |
c63ba9e1 | 2039 | module_exit(storvsc_drv_exit); |