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851b1642 AK |
1 | /* |
2 | * Linux driver for VMware's para-virtualized SCSI HBA. | |
3 | * | |
a2713cce | 4 | * Copyright (C) 2008-2014, VMware, Inc. All Rights Reserved. |
851b1642 AK |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; version 2 of the License and no later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
13 | * NON INFRINGEMENT. See the GNU General Public License for more | |
14 | * details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | * | |
a9310735 | 20 | * Maintained by: Arvind Kumar <arvindkumar@vmware.com> |
851b1642 AK |
21 | * |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/interrupt.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
851b1642 AK |
28 | #include <linux/workqueue.h> |
29 | #include <linux/pci.h> | |
30 | ||
31 | #include <scsi/scsi.h> | |
32 | #include <scsi/scsi_host.h> | |
33 | #include <scsi/scsi_cmnd.h> | |
34 | #include <scsi/scsi_device.h> | |
02845560 | 35 | #include <scsi/scsi_tcq.h> |
851b1642 AK |
36 | |
37 | #include "vmw_pvscsi.h" | |
38 | ||
39 | #define PVSCSI_LINUX_DRIVER_DESC "VMware PVSCSI driver" | |
40 | ||
41 | MODULE_DESCRIPTION(PVSCSI_LINUX_DRIVER_DESC); | |
42 | MODULE_AUTHOR("VMware, Inc."); | |
43 | MODULE_LICENSE("GPL"); | |
44 | MODULE_VERSION(PVSCSI_DRIVER_VERSION_STRING); | |
45 | ||
46 | #define PVSCSI_DEFAULT_NUM_PAGES_PER_RING 8 | |
47 | #define PVSCSI_DEFAULT_NUM_PAGES_MSG_RING 1 | |
02845560 | 48 | #define PVSCSI_DEFAULT_QUEUE_DEPTH 254 |
851b1642 AK |
49 | #define SGL_SIZE PAGE_SIZE |
50 | ||
51 | struct pvscsi_sg_list { | |
52 | struct PVSCSISGElement sge[PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT]; | |
53 | }; | |
54 | ||
55 | struct pvscsi_ctx { | |
56 | /* | |
57 | * The index of the context in cmd_map serves as the context ID for a | |
58 | * 1-to-1 mapping completions back to requests. | |
59 | */ | |
60 | struct scsi_cmnd *cmd; | |
61 | struct pvscsi_sg_list *sgl; | |
62 | struct list_head list; | |
63 | dma_addr_t dataPA; | |
64 | dma_addr_t sensePA; | |
65 | dma_addr_t sglPA; | |
a2713cce | 66 | struct completion *abort_cmp; |
851b1642 AK |
67 | }; |
68 | ||
69 | struct pvscsi_adapter { | |
70 | char *mmioBase; | |
71 | unsigned int irq; | |
72 | u8 rev; | |
73 | bool use_msi; | |
74 | bool use_msix; | |
75 | bool use_msg; | |
2a815b5a | 76 | bool use_req_threshold; |
851b1642 AK |
77 | |
78 | spinlock_t hw_lock; | |
79 | ||
80 | struct workqueue_struct *workqueue; | |
81 | struct work_struct work; | |
82 | ||
83 | struct PVSCSIRingReqDesc *req_ring; | |
84 | unsigned req_pages; | |
85 | unsigned req_depth; | |
86 | dma_addr_t reqRingPA; | |
87 | ||
88 | struct PVSCSIRingCmpDesc *cmp_ring; | |
89 | unsigned cmp_pages; | |
90 | dma_addr_t cmpRingPA; | |
91 | ||
92 | struct PVSCSIRingMsgDesc *msg_ring; | |
93 | unsigned msg_pages; | |
94 | dma_addr_t msgRingPA; | |
95 | ||
96 | struct PVSCSIRingsState *rings_state; | |
97 | dma_addr_t ringStatePA; | |
98 | ||
99 | struct pci_dev *dev; | |
100 | struct Scsi_Host *host; | |
101 | ||
102 | struct list_head cmd_pool; | |
103 | struct pvscsi_ctx *cmd_map; | |
104 | }; | |
105 | ||
106 | ||
107 | /* Command line parameters */ | |
02845560 | 108 | static int pvscsi_ring_pages; |
851b1642 AK |
109 | static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; |
110 | static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; | |
111 | static bool pvscsi_disable_msi; | |
112 | static bool pvscsi_disable_msix; | |
113 | static bool pvscsi_use_msg = true; | |
2a815b5a | 114 | static bool pvscsi_use_req_threshold = true; |
851b1642 AK |
115 | |
116 | #define PVSCSI_RW (S_IRUSR | S_IWUSR) | |
117 | ||
118 | module_param_named(ring_pages, pvscsi_ring_pages, int, PVSCSI_RW); | |
119 | MODULE_PARM_DESC(ring_pages, "Number of pages per req/cmp ring - (default=" | |
02845560 AK |
120 | __stringify(PVSCSI_DEFAULT_NUM_PAGES_PER_RING) |
121 | "[up to 16 targets]," | |
122 | __stringify(PVSCSI_SETUP_RINGS_MAX_NUM_PAGES) | |
123 | "[for 16+ targets])"); | |
851b1642 AK |
124 | |
125 | module_param_named(msg_ring_pages, pvscsi_msg_ring_pages, int, PVSCSI_RW); | |
126 | MODULE_PARM_DESC(msg_ring_pages, "Number of pages for the msg ring - (default=" | |
127 | __stringify(PVSCSI_DEFAULT_NUM_PAGES_MSG_RING) ")"); | |
128 | ||
129 | module_param_named(cmd_per_lun, pvscsi_cmd_per_lun, int, PVSCSI_RW); | |
130 | MODULE_PARM_DESC(cmd_per_lun, "Maximum commands per lun - (default=" | |
02845560 | 131 | __stringify(PVSCSI_DEFAULT_QUEUE_DEPTH) ")"); |
851b1642 AK |
132 | |
133 | module_param_named(disable_msi, pvscsi_disable_msi, bool, PVSCSI_RW); | |
134 | MODULE_PARM_DESC(disable_msi, "Disable MSI use in driver - (default=0)"); | |
135 | ||
136 | module_param_named(disable_msix, pvscsi_disable_msix, bool, PVSCSI_RW); | |
137 | MODULE_PARM_DESC(disable_msix, "Disable MSI-X use in driver - (default=0)"); | |
138 | ||
139 | module_param_named(use_msg, pvscsi_use_msg, bool, PVSCSI_RW); | |
140 | MODULE_PARM_DESC(use_msg, "Use msg ring when available - (default=1)"); | |
141 | ||
2a815b5a RM |
142 | module_param_named(use_req_threshold, pvscsi_use_req_threshold, |
143 | bool, PVSCSI_RW); | |
144 | MODULE_PARM_DESC(use_req_threshold, "Use driver-based request coalescing if configured - (default=1)"); | |
145 | ||
851b1642 AK |
146 | static const struct pci_device_id pvscsi_pci_tbl[] = { |
147 | { PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_PVSCSI) }, | |
148 | { 0 } | |
149 | }; | |
150 | ||
151 | MODULE_DEVICE_TABLE(pci, pvscsi_pci_tbl); | |
152 | ||
153 | static struct device * | |
154 | pvscsi_dev(const struct pvscsi_adapter *adapter) | |
155 | { | |
156 | return &(adapter->dev->dev); | |
157 | } | |
158 | ||
159 | static struct pvscsi_ctx * | |
160 | pvscsi_find_context(const struct pvscsi_adapter *adapter, struct scsi_cmnd *cmd) | |
161 | { | |
162 | struct pvscsi_ctx *ctx, *end; | |
163 | ||
164 | end = &adapter->cmd_map[adapter->req_depth]; | |
165 | for (ctx = adapter->cmd_map; ctx < end; ctx++) | |
166 | if (ctx->cmd == cmd) | |
167 | return ctx; | |
168 | ||
169 | return NULL; | |
170 | } | |
171 | ||
172 | static struct pvscsi_ctx * | |
173 | pvscsi_acquire_context(struct pvscsi_adapter *adapter, struct scsi_cmnd *cmd) | |
174 | { | |
175 | struct pvscsi_ctx *ctx; | |
176 | ||
177 | if (list_empty(&adapter->cmd_pool)) | |
178 | return NULL; | |
179 | ||
180 | ctx = list_first_entry(&adapter->cmd_pool, struct pvscsi_ctx, list); | |
181 | ctx->cmd = cmd; | |
182 | list_del(&ctx->list); | |
183 | ||
184 | return ctx; | |
185 | } | |
186 | ||
187 | static void pvscsi_release_context(struct pvscsi_adapter *adapter, | |
188 | struct pvscsi_ctx *ctx) | |
189 | { | |
190 | ctx->cmd = NULL; | |
a2713cce | 191 | ctx->abort_cmp = NULL; |
851b1642 AK |
192 | list_add(&ctx->list, &adapter->cmd_pool); |
193 | } | |
194 | ||
195 | /* | |
196 | * Map a pvscsi_ctx struct to a context ID field value; we map to a simple | |
197 | * non-zero integer. ctx always points to an entry in cmd_map array, hence | |
198 | * the return value is always >=1. | |
199 | */ | |
200 | static u64 pvscsi_map_context(const struct pvscsi_adapter *adapter, | |
201 | const struct pvscsi_ctx *ctx) | |
202 | { | |
203 | return ctx - adapter->cmd_map + 1; | |
204 | } | |
205 | ||
206 | static struct pvscsi_ctx * | |
207 | pvscsi_get_context(const struct pvscsi_adapter *adapter, u64 context) | |
208 | { | |
209 | return &adapter->cmd_map[context - 1]; | |
210 | } | |
211 | ||
212 | static void pvscsi_reg_write(const struct pvscsi_adapter *adapter, | |
213 | u32 offset, u32 val) | |
214 | { | |
215 | writel(val, adapter->mmioBase + offset); | |
216 | } | |
217 | ||
218 | static u32 pvscsi_reg_read(const struct pvscsi_adapter *adapter, u32 offset) | |
219 | { | |
220 | return readl(adapter->mmioBase + offset); | |
221 | } | |
222 | ||
223 | static u32 pvscsi_read_intr_status(const struct pvscsi_adapter *adapter) | |
224 | { | |
225 | return pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_INTR_STATUS); | |
226 | } | |
227 | ||
228 | static void pvscsi_write_intr_status(const struct pvscsi_adapter *adapter, | |
229 | u32 val) | |
230 | { | |
231 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_STATUS, val); | |
232 | } | |
233 | ||
234 | static void pvscsi_unmask_intr(const struct pvscsi_adapter *adapter) | |
235 | { | |
236 | u32 intr_bits; | |
237 | ||
238 | intr_bits = PVSCSI_INTR_CMPL_MASK; | |
239 | if (adapter->use_msg) | |
240 | intr_bits |= PVSCSI_INTR_MSG_MASK; | |
241 | ||
242 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_MASK, intr_bits); | |
243 | } | |
244 | ||
245 | static void pvscsi_mask_intr(const struct pvscsi_adapter *adapter) | |
246 | { | |
247 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_MASK, 0); | |
248 | } | |
249 | ||
250 | static void pvscsi_write_cmd_desc(const struct pvscsi_adapter *adapter, | |
251 | u32 cmd, const void *desc, size_t len) | |
252 | { | |
253 | const u32 *ptr = desc; | |
254 | size_t i; | |
255 | ||
256 | len /= sizeof(*ptr); | |
257 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, cmd); | |
258 | for (i = 0; i < len; i++) | |
259 | pvscsi_reg_write(adapter, | |
260 | PVSCSI_REG_OFFSET_COMMAND_DATA, ptr[i]); | |
261 | } | |
262 | ||
263 | static void pvscsi_abort_cmd(const struct pvscsi_adapter *adapter, | |
264 | const struct pvscsi_ctx *ctx) | |
265 | { | |
266 | struct PVSCSICmdDescAbortCmd cmd = { 0 }; | |
267 | ||
268 | cmd.target = ctx->cmd->device->id; | |
269 | cmd.context = pvscsi_map_context(adapter, ctx); | |
270 | ||
271 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_ABORT_CMD, &cmd, sizeof(cmd)); | |
272 | } | |
273 | ||
274 | static void pvscsi_kick_rw_io(const struct pvscsi_adapter *adapter) | |
275 | { | |
276 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_KICK_RW_IO, 0); | |
277 | } | |
278 | ||
279 | static void pvscsi_process_request_ring(const struct pvscsi_adapter *adapter) | |
280 | { | |
281 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_KICK_NON_RW_IO, 0); | |
282 | } | |
283 | ||
284 | static int scsi_is_rw(unsigned char op) | |
285 | { | |
286 | return op == READ_6 || op == WRITE_6 || | |
287 | op == READ_10 || op == WRITE_10 || | |
288 | op == READ_12 || op == WRITE_12 || | |
289 | op == READ_16 || op == WRITE_16; | |
290 | } | |
291 | ||
292 | static void pvscsi_kick_io(const struct pvscsi_adapter *adapter, | |
293 | unsigned char op) | |
294 | { | |
2a815b5a RM |
295 | if (scsi_is_rw(op)) { |
296 | struct PVSCSIRingsState *s = adapter->rings_state; | |
297 | ||
298 | if (!adapter->use_req_threshold || | |
299 | s->reqProdIdx - s->reqConsIdx >= s->reqCallThreshold) | |
300 | pvscsi_kick_rw_io(adapter); | |
301 | } else { | |
851b1642 | 302 | pvscsi_process_request_ring(adapter); |
2a815b5a | 303 | } |
851b1642 AK |
304 | } |
305 | ||
306 | static void ll_adapter_reset(const struct pvscsi_adapter *adapter) | |
307 | { | |
308 | dev_dbg(pvscsi_dev(adapter), "Adapter Reset on %p\n", adapter); | |
309 | ||
310 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_ADAPTER_RESET, NULL, 0); | |
311 | } | |
312 | ||
313 | static void ll_bus_reset(const struct pvscsi_adapter *adapter) | |
314 | { | |
59e13d48 | 315 | dev_dbg(pvscsi_dev(adapter), "Resetting bus on %p\n", adapter); |
851b1642 AK |
316 | |
317 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_RESET_BUS, NULL, 0); | |
318 | } | |
319 | ||
320 | static void ll_device_reset(const struct pvscsi_adapter *adapter, u32 target) | |
321 | { | |
322 | struct PVSCSICmdDescResetDevice cmd = { 0 }; | |
323 | ||
59e13d48 | 324 | dev_dbg(pvscsi_dev(adapter), "Resetting device: target=%u\n", target); |
851b1642 AK |
325 | |
326 | cmd.target = target; | |
327 | ||
328 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_RESET_DEVICE, | |
329 | &cmd, sizeof(cmd)); | |
330 | } | |
331 | ||
332 | static void pvscsi_create_sg(struct pvscsi_ctx *ctx, | |
333 | struct scatterlist *sg, unsigned count) | |
334 | { | |
335 | unsigned i; | |
336 | struct PVSCSISGElement *sge; | |
337 | ||
338 | BUG_ON(count > PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT); | |
339 | ||
340 | sge = &ctx->sgl->sge[0]; | |
341 | for (i = 0; i < count; i++, sg++) { | |
342 | sge[i].addr = sg_dma_address(sg); | |
343 | sge[i].length = sg_dma_len(sg); | |
344 | sge[i].flags = 0; | |
345 | } | |
346 | } | |
347 | ||
348 | /* | |
349 | * Map all data buffers for a command into PCI space and | |
350 | * setup the scatter/gather list if needed. | |
351 | */ | |
352 | static void pvscsi_map_buffers(struct pvscsi_adapter *adapter, | |
353 | struct pvscsi_ctx *ctx, struct scsi_cmnd *cmd, | |
354 | struct PVSCSIRingReqDesc *e) | |
355 | { | |
356 | unsigned count; | |
357 | unsigned bufflen = scsi_bufflen(cmd); | |
358 | struct scatterlist *sg; | |
359 | ||
360 | e->dataLen = bufflen; | |
361 | e->dataAddr = 0; | |
362 | if (bufflen == 0) | |
363 | return; | |
364 | ||
365 | sg = scsi_sglist(cmd); | |
366 | count = scsi_sg_count(cmd); | |
367 | if (count != 0) { | |
368 | int segs = scsi_dma_map(cmd); | |
369 | if (segs > 1) { | |
370 | pvscsi_create_sg(ctx, sg, segs); | |
371 | ||
372 | e->flags |= PVSCSI_FLAG_CMD_WITH_SG_LIST; | |
373 | ctx->sglPA = pci_map_single(adapter->dev, ctx->sgl, | |
374 | SGL_SIZE, PCI_DMA_TODEVICE); | |
375 | e->dataAddr = ctx->sglPA; | |
376 | } else | |
377 | e->dataAddr = sg_dma_address(sg); | |
378 | } else { | |
379 | /* | |
380 | * In case there is no S/G list, scsi_sglist points | |
381 | * directly to the buffer. | |
382 | */ | |
383 | ctx->dataPA = pci_map_single(adapter->dev, sg, bufflen, | |
384 | cmd->sc_data_direction); | |
385 | e->dataAddr = ctx->dataPA; | |
386 | } | |
387 | } | |
388 | ||
389 | static void pvscsi_unmap_buffers(const struct pvscsi_adapter *adapter, | |
390 | struct pvscsi_ctx *ctx) | |
391 | { | |
392 | struct scsi_cmnd *cmd; | |
393 | unsigned bufflen; | |
394 | ||
395 | cmd = ctx->cmd; | |
396 | bufflen = scsi_bufflen(cmd); | |
397 | ||
398 | if (bufflen != 0) { | |
399 | unsigned count = scsi_sg_count(cmd); | |
400 | ||
401 | if (count != 0) { | |
402 | scsi_dma_unmap(cmd); | |
403 | if (ctx->sglPA) { | |
404 | pci_unmap_single(adapter->dev, ctx->sglPA, | |
405 | SGL_SIZE, PCI_DMA_TODEVICE); | |
406 | ctx->sglPA = 0; | |
407 | } | |
408 | } else | |
409 | pci_unmap_single(adapter->dev, ctx->dataPA, bufflen, | |
410 | cmd->sc_data_direction); | |
411 | } | |
412 | if (cmd->sense_buffer) | |
413 | pci_unmap_single(adapter->dev, ctx->sensePA, | |
414 | SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); | |
415 | } | |
416 | ||
6f039790 | 417 | static int pvscsi_allocate_rings(struct pvscsi_adapter *adapter) |
851b1642 AK |
418 | { |
419 | adapter->rings_state = pci_alloc_consistent(adapter->dev, PAGE_SIZE, | |
420 | &adapter->ringStatePA); | |
421 | if (!adapter->rings_state) | |
422 | return -ENOMEM; | |
423 | ||
424 | adapter->req_pages = min(PVSCSI_MAX_NUM_PAGES_REQ_RING, | |
425 | pvscsi_ring_pages); | |
426 | adapter->req_depth = adapter->req_pages | |
427 | * PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE; | |
428 | adapter->req_ring = pci_alloc_consistent(adapter->dev, | |
429 | adapter->req_pages * PAGE_SIZE, | |
430 | &adapter->reqRingPA); | |
431 | if (!adapter->req_ring) | |
432 | return -ENOMEM; | |
433 | ||
434 | adapter->cmp_pages = min(PVSCSI_MAX_NUM_PAGES_CMP_RING, | |
435 | pvscsi_ring_pages); | |
436 | adapter->cmp_ring = pci_alloc_consistent(adapter->dev, | |
437 | adapter->cmp_pages * PAGE_SIZE, | |
438 | &adapter->cmpRingPA); | |
439 | if (!adapter->cmp_ring) | |
440 | return -ENOMEM; | |
441 | ||
442 | BUG_ON(!IS_ALIGNED(adapter->ringStatePA, PAGE_SIZE)); | |
443 | BUG_ON(!IS_ALIGNED(adapter->reqRingPA, PAGE_SIZE)); | |
444 | BUG_ON(!IS_ALIGNED(adapter->cmpRingPA, PAGE_SIZE)); | |
445 | ||
446 | if (!adapter->use_msg) | |
447 | return 0; | |
448 | ||
449 | adapter->msg_pages = min(PVSCSI_MAX_NUM_PAGES_MSG_RING, | |
450 | pvscsi_msg_ring_pages); | |
451 | adapter->msg_ring = pci_alloc_consistent(adapter->dev, | |
452 | adapter->msg_pages * PAGE_SIZE, | |
453 | &adapter->msgRingPA); | |
454 | if (!adapter->msg_ring) | |
455 | return -ENOMEM; | |
456 | BUG_ON(!IS_ALIGNED(adapter->msgRingPA, PAGE_SIZE)); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static void pvscsi_setup_all_rings(const struct pvscsi_adapter *adapter) | |
462 | { | |
463 | struct PVSCSICmdDescSetupRings cmd = { 0 }; | |
464 | dma_addr_t base; | |
465 | unsigned i; | |
466 | ||
467 | cmd.ringsStatePPN = adapter->ringStatePA >> PAGE_SHIFT; | |
468 | cmd.reqRingNumPages = adapter->req_pages; | |
469 | cmd.cmpRingNumPages = adapter->cmp_pages; | |
470 | ||
471 | base = adapter->reqRingPA; | |
472 | for (i = 0; i < adapter->req_pages; i++) { | |
473 | cmd.reqRingPPNs[i] = base >> PAGE_SHIFT; | |
474 | base += PAGE_SIZE; | |
475 | } | |
476 | ||
477 | base = adapter->cmpRingPA; | |
478 | for (i = 0; i < adapter->cmp_pages; i++) { | |
479 | cmd.cmpRingPPNs[i] = base >> PAGE_SHIFT; | |
480 | base += PAGE_SIZE; | |
481 | } | |
482 | ||
483 | memset(adapter->rings_state, 0, PAGE_SIZE); | |
484 | memset(adapter->req_ring, 0, adapter->req_pages * PAGE_SIZE); | |
485 | memset(adapter->cmp_ring, 0, adapter->cmp_pages * PAGE_SIZE); | |
486 | ||
487 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_SETUP_RINGS, | |
488 | &cmd, sizeof(cmd)); | |
489 | ||
490 | if (adapter->use_msg) { | |
491 | struct PVSCSICmdDescSetupMsgRing cmd_msg = { 0 }; | |
492 | ||
493 | cmd_msg.numPages = adapter->msg_pages; | |
494 | ||
495 | base = adapter->msgRingPA; | |
496 | for (i = 0; i < adapter->msg_pages; i++) { | |
497 | cmd_msg.ringPPNs[i] = base >> PAGE_SHIFT; | |
498 | base += PAGE_SIZE; | |
499 | } | |
500 | memset(adapter->msg_ring, 0, adapter->msg_pages * PAGE_SIZE); | |
501 | ||
502 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_SETUP_MSG_RING, | |
503 | &cmd_msg, sizeof(cmd_msg)); | |
504 | } | |
505 | } | |
506 | ||
02845560 AK |
507 | static int pvscsi_change_queue_depth(struct scsi_device *sdev, |
508 | int qdepth, | |
509 | int reason) | |
510 | { | |
511 | int max_depth; | |
512 | struct Scsi_Host *shost = sdev->host; | |
513 | ||
514 | if (reason != SCSI_QDEPTH_DEFAULT) | |
515 | /* | |
516 | * We support only changing default. | |
517 | */ | |
518 | return -EOPNOTSUPP; | |
519 | ||
520 | max_depth = shost->can_queue; | |
521 | if (!sdev->tagged_supported) | |
522 | max_depth = 1; | |
523 | if (qdepth > max_depth) | |
524 | qdepth = max_depth; | |
525 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); | |
526 | ||
527 | if (sdev->inquiry_len > 7) | |
528 | sdev_printk(KERN_INFO, sdev, | |
529 | "qdepth(%d), tagged(%d), simple(%d), ordered(%d), scsi_level(%d), cmd_que(%d)\n", | |
530 | sdev->queue_depth, sdev->tagged_supported, | |
531 | sdev->simple_tags, sdev->ordered_tags, | |
532 | sdev->scsi_level, (sdev->inquiry[7] & 2) >> 1); | |
533 | return sdev->queue_depth; | |
534 | } | |
535 | ||
851b1642 AK |
536 | /* |
537 | * Pull a completion descriptor off and pass the completion back | |
538 | * to the SCSI mid layer. | |
539 | */ | |
540 | static void pvscsi_complete_request(struct pvscsi_adapter *adapter, | |
541 | const struct PVSCSIRingCmpDesc *e) | |
542 | { | |
543 | struct pvscsi_ctx *ctx; | |
544 | struct scsi_cmnd *cmd; | |
a2713cce | 545 | struct completion *abort_cmp; |
851b1642 AK |
546 | u32 btstat = e->hostStatus; |
547 | u32 sdstat = e->scsiStatus; | |
548 | ||
549 | ctx = pvscsi_get_context(adapter, e->context); | |
550 | cmd = ctx->cmd; | |
a2713cce | 551 | abort_cmp = ctx->abort_cmp; |
851b1642 AK |
552 | pvscsi_unmap_buffers(adapter, ctx); |
553 | pvscsi_release_context(adapter, ctx); | |
a2713cce AK |
554 | if (abort_cmp) { |
555 | /* | |
556 | * The command was requested to be aborted. Just signal that | |
557 | * the request completed and swallow the actual cmd completion | |
558 | * here. The abort handler will post a completion for this | |
559 | * command indicating that it got successfully aborted. | |
560 | */ | |
561 | complete(abort_cmp); | |
562 | return; | |
563 | } | |
851b1642 | 564 | |
a2713cce | 565 | cmd->result = 0; |
851b1642 AK |
566 | if (sdstat != SAM_STAT_GOOD && |
567 | (btstat == BTSTAT_SUCCESS || | |
568 | btstat == BTSTAT_LINKED_COMMAND_COMPLETED || | |
569 | btstat == BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG)) { | |
570 | cmd->result = (DID_OK << 16) | sdstat; | |
571 | if (sdstat == SAM_STAT_CHECK_CONDITION && cmd->sense_buffer) | |
572 | cmd->result |= (DRIVER_SENSE << 24); | |
573 | } else | |
574 | switch (btstat) { | |
575 | case BTSTAT_SUCCESS: | |
576 | case BTSTAT_LINKED_COMMAND_COMPLETED: | |
577 | case BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG: | |
578 | /* If everything went fine, let's move on.. */ | |
579 | cmd->result = (DID_OK << 16); | |
580 | break; | |
581 | ||
582 | case BTSTAT_DATARUN: | |
583 | case BTSTAT_DATA_UNDERRUN: | |
584 | /* Report residual data in underruns */ | |
585 | scsi_set_resid(cmd, scsi_bufflen(cmd) - e->dataLen); | |
586 | cmd->result = (DID_ERROR << 16); | |
587 | break; | |
588 | ||
589 | case BTSTAT_SELTIMEO: | |
590 | /* Our emulation returns this for non-connected devs */ | |
591 | cmd->result = (DID_BAD_TARGET << 16); | |
592 | break; | |
593 | ||
594 | case BTSTAT_LUNMISMATCH: | |
595 | case BTSTAT_TAGREJECT: | |
596 | case BTSTAT_BADMSG: | |
597 | cmd->result = (DRIVER_INVALID << 24); | |
598 | /* fall through */ | |
599 | ||
600 | case BTSTAT_HAHARDWARE: | |
601 | case BTSTAT_INVPHASE: | |
602 | case BTSTAT_HATIMEOUT: | |
603 | case BTSTAT_NORESPONSE: | |
604 | case BTSTAT_DISCONNECT: | |
605 | case BTSTAT_HASOFTWARE: | |
606 | case BTSTAT_BUSFREE: | |
607 | case BTSTAT_SENSFAILED: | |
608 | cmd->result |= (DID_ERROR << 16); | |
609 | break; | |
610 | ||
611 | case BTSTAT_SENTRST: | |
612 | case BTSTAT_RECVRST: | |
613 | case BTSTAT_BUSRESET: | |
614 | cmd->result = (DID_RESET << 16); | |
615 | break; | |
616 | ||
617 | case BTSTAT_ABORTQUEUE: | |
618 | cmd->result = (DID_ABORT << 16); | |
619 | break; | |
620 | ||
621 | case BTSTAT_SCSIPARITY: | |
622 | cmd->result = (DID_PARITY << 16); | |
623 | break; | |
624 | ||
625 | default: | |
626 | cmd->result = (DID_ERROR << 16); | |
627 | scmd_printk(KERN_DEBUG, cmd, | |
628 | "Unknown completion status: 0x%x\n", | |
629 | btstat); | |
630 | } | |
631 | ||
632 | dev_dbg(&cmd->device->sdev_gendev, | |
633 | "cmd=%p %x ctx=%p result=0x%x status=0x%x,%x\n", | |
634 | cmd, cmd->cmnd[0], ctx, cmd->result, btstat, sdstat); | |
635 | ||
636 | cmd->scsi_done(cmd); | |
637 | } | |
638 | ||
639 | /* | |
640 | * barrier usage : Since the PVSCSI device is emulated, there could be cases | |
641 | * where we may want to serialize some accesses between the driver and the | |
642 | * emulation layer. We use compiler barriers instead of the more expensive | |
643 | * memory barriers because PVSCSI is only supported on X86 which has strong | |
644 | * memory access ordering. | |
645 | */ | |
646 | static void pvscsi_process_completion_ring(struct pvscsi_adapter *adapter) | |
647 | { | |
648 | struct PVSCSIRingsState *s = adapter->rings_state; | |
649 | struct PVSCSIRingCmpDesc *ring = adapter->cmp_ring; | |
650 | u32 cmp_entries = s->cmpNumEntriesLog2; | |
651 | ||
652 | while (s->cmpConsIdx != s->cmpProdIdx) { | |
653 | struct PVSCSIRingCmpDesc *e = ring + (s->cmpConsIdx & | |
654 | MASK(cmp_entries)); | |
655 | /* | |
656 | * This barrier() ensures that *e is not dereferenced while | |
657 | * the device emulation still writes data into the slot. | |
658 | * Since the device emulation advances s->cmpProdIdx only after | |
659 | * updating the slot we want to check it first. | |
660 | */ | |
661 | barrier(); | |
662 | pvscsi_complete_request(adapter, e); | |
663 | /* | |
664 | * This barrier() ensures that compiler doesn't reorder write | |
665 | * to s->cmpConsIdx before the read of (*e) inside | |
666 | * pvscsi_complete_request. Otherwise, device emulation may | |
667 | * overwrite *e before we had a chance to read it. | |
668 | */ | |
669 | barrier(); | |
670 | s->cmpConsIdx++; | |
671 | } | |
672 | } | |
673 | ||
674 | /* | |
675 | * Translate a Linux SCSI request into a request ring entry. | |
676 | */ | |
677 | static int pvscsi_queue_ring(struct pvscsi_adapter *adapter, | |
678 | struct pvscsi_ctx *ctx, struct scsi_cmnd *cmd) | |
679 | { | |
680 | struct PVSCSIRingsState *s; | |
681 | struct PVSCSIRingReqDesc *e; | |
682 | struct scsi_device *sdev; | |
683 | u32 req_entries; | |
684 | ||
685 | s = adapter->rings_state; | |
686 | sdev = cmd->device; | |
687 | req_entries = s->reqNumEntriesLog2; | |
688 | ||
689 | /* | |
690 | * If this condition holds, we might have room on the request ring, but | |
691 | * we might not have room on the completion ring for the response. | |
692 | * However, we have already ruled out this possibility - we would not | |
693 | * have successfully allocated a context if it were true, since we only | |
694 | * have one context per request entry. Check for it anyway, since it | |
695 | * would be a serious bug. | |
696 | */ | |
697 | if (s->reqProdIdx - s->cmpConsIdx >= 1 << req_entries) { | |
698 | scmd_printk(KERN_ERR, cmd, "vmw_pvscsi: " | |
699 | "ring full: reqProdIdx=%d cmpConsIdx=%d\n", | |
700 | s->reqProdIdx, s->cmpConsIdx); | |
701 | return -1; | |
702 | } | |
703 | ||
704 | e = adapter->req_ring + (s->reqProdIdx & MASK(req_entries)); | |
705 | ||
706 | e->bus = sdev->channel; | |
707 | e->target = sdev->id; | |
708 | memset(e->lun, 0, sizeof(e->lun)); | |
709 | e->lun[1] = sdev->lun; | |
710 | ||
711 | if (cmd->sense_buffer) { | |
712 | ctx->sensePA = pci_map_single(adapter->dev, cmd->sense_buffer, | |
713 | SCSI_SENSE_BUFFERSIZE, | |
714 | PCI_DMA_FROMDEVICE); | |
715 | e->senseAddr = ctx->sensePA; | |
716 | e->senseLen = SCSI_SENSE_BUFFERSIZE; | |
717 | } else { | |
718 | e->senseLen = 0; | |
719 | e->senseAddr = 0; | |
720 | } | |
721 | e->cdbLen = cmd->cmd_len; | |
722 | e->vcpuHint = smp_processor_id(); | |
723 | memcpy(e->cdb, cmd->cmnd, e->cdbLen); | |
724 | ||
725 | e->tag = SIMPLE_QUEUE_TAG; | |
726 | if (sdev->tagged_supported && | |
727 | (cmd->tag == HEAD_OF_QUEUE_TAG || | |
728 | cmd->tag == ORDERED_QUEUE_TAG)) | |
729 | e->tag = cmd->tag; | |
730 | ||
731 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
732 | e->flags = PVSCSI_FLAG_CMD_DIR_TOHOST; | |
733 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
734 | e->flags = PVSCSI_FLAG_CMD_DIR_TODEVICE; | |
735 | else if (cmd->sc_data_direction == DMA_NONE) | |
736 | e->flags = PVSCSI_FLAG_CMD_DIR_NONE; | |
737 | else | |
738 | e->flags = 0; | |
739 | ||
740 | pvscsi_map_buffers(adapter, ctx, cmd, e); | |
741 | ||
742 | e->context = pvscsi_map_context(adapter, ctx); | |
743 | ||
744 | barrier(); | |
745 | ||
746 | s->reqProdIdx++; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
f281233d | 751 | static int pvscsi_queue_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
851b1642 AK |
752 | { |
753 | struct Scsi_Host *host = cmd->device->host; | |
754 | struct pvscsi_adapter *adapter = shost_priv(host); | |
755 | struct pvscsi_ctx *ctx; | |
756 | unsigned long flags; | |
757 | ||
758 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
759 | ||
760 | ctx = pvscsi_acquire_context(adapter, cmd); | |
761 | if (!ctx || pvscsi_queue_ring(adapter, ctx, cmd) != 0) { | |
762 | if (ctx) | |
763 | pvscsi_release_context(adapter, ctx); | |
764 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
765 | return SCSI_MLQUEUE_HOST_BUSY; | |
766 | } | |
767 | ||
768 | cmd->scsi_done = done; | |
769 | ||
770 | dev_dbg(&cmd->device->sdev_gendev, | |
771 | "queued cmd %p, ctx %p, op=%x\n", cmd, ctx, cmd->cmnd[0]); | |
772 | ||
773 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
774 | ||
775 | pvscsi_kick_io(adapter, cmd->cmnd[0]); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
f281233d JG |
780 | static DEF_SCSI_QCMD(pvscsi_queue) |
781 | ||
851b1642 AK |
782 | static int pvscsi_abort(struct scsi_cmnd *cmd) |
783 | { | |
784 | struct pvscsi_adapter *adapter = shost_priv(cmd->device->host); | |
785 | struct pvscsi_ctx *ctx; | |
786 | unsigned long flags; | |
a2713cce AK |
787 | int result = SUCCESS; |
788 | DECLARE_COMPLETION_ONSTACK(abort_cmp); | |
851b1642 AK |
789 | |
790 | scmd_printk(KERN_DEBUG, cmd, "task abort on host %u, %p\n", | |
791 | adapter->host->host_no, cmd); | |
792 | ||
793 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
794 | ||
795 | /* | |
796 | * Poll the completion ring first - we might be trying to abort | |
797 | * a command that is waiting to be dispatched in the completion ring. | |
798 | */ | |
799 | pvscsi_process_completion_ring(adapter); | |
800 | ||
801 | /* | |
802 | * If there is no context for the command, it either already succeeded | |
803 | * or else was never properly issued. Not our problem. | |
804 | */ | |
805 | ctx = pvscsi_find_context(adapter, cmd); | |
806 | if (!ctx) { | |
807 | scmd_printk(KERN_DEBUG, cmd, "Failed to abort cmd %p\n", cmd); | |
808 | goto out; | |
809 | } | |
810 | ||
a2713cce AK |
811 | /* |
812 | * Mark that the command has been requested to be aborted and issue | |
813 | * the abort. | |
814 | */ | |
815 | ctx->abort_cmp = &abort_cmp; | |
816 | ||
851b1642 | 817 | pvscsi_abort_cmd(adapter, ctx); |
a2713cce AK |
818 | spin_unlock_irqrestore(&adapter->hw_lock, flags); |
819 | /* Wait for 2 secs for the completion. */ | |
820 | wait_for_completion_timeout(&abort_cmp, msecs_to_jiffies(2000)); | |
821 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
851b1642 | 822 | |
a2713cce AK |
823 | if (!completion_done(&abort_cmp)) { |
824 | /* | |
825 | * Failed to abort the command, unmark the fact that it | |
826 | * was requested to be aborted. | |
827 | */ | |
828 | ctx->abort_cmp = NULL; | |
829 | result = FAILED; | |
830 | scmd_printk(KERN_DEBUG, cmd, | |
831 | "Failed to get completion for aborted cmd %p\n", | |
832 | cmd); | |
833 | goto out; | |
834 | } | |
835 | ||
836 | /* | |
837 | * Successfully aborted the command. | |
838 | */ | |
839 | cmd->result = (DID_ABORT << 16); | |
840 | cmd->scsi_done(cmd); | |
851b1642 AK |
841 | |
842 | out: | |
843 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
a2713cce | 844 | return result; |
851b1642 AK |
845 | } |
846 | ||
847 | /* | |
848 | * Abort all outstanding requests. This is only safe to use if the completion | |
849 | * ring will never be walked again or the device has been reset, because it | |
850 | * destroys the 1-1 mapping between context field passed to emulation and our | |
851 | * request structure. | |
852 | */ | |
853 | static void pvscsi_reset_all(struct pvscsi_adapter *adapter) | |
854 | { | |
855 | unsigned i; | |
856 | ||
857 | for (i = 0; i < adapter->req_depth; i++) { | |
858 | struct pvscsi_ctx *ctx = &adapter->cmd_map[i]; | |
859 | struct scsi_cmnd *cmd = ctx->cmd; | |
860 | if (cmd) { | |
861 | scmd_printk(KERN_ERR, cmd, | |
862 | "Forced reset on cmd %p\n", cmd); | |
863 | pvscsi_unmap_buffers(adapter, ctx); | |
864 | pvscsi_release_context(adapter, ctx); | |
865 | cmd->result = (DID_RESET << 16); | |
866 | cmd->scsi_done(cmd); | |
867 | } | |
868 | } | |
869 | } | |
870 | ||
871 | static int pvscsi_host_reset(struct scsi_cmnd *cmd) | |
872 | { | |
873 | struct Scsi_Host *host = cmd->device->host; | |
874 | struct pvscsi_adapter *adapter = shost_priv(host); | |
875 | unsigned long flags; | |
876 | bool use_msg; | |
877 | ||
878 | scmd_printk(KERN_INFO, cmd, "SCSI Host reset\n"); | |
879 | ||
880 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
881 | ||
882 | use_msg = adapter->use_msg; | |
883 | ||
884 | if (use_msg) { | |
885 | adapter->use_msg = 0; | |
886 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
887 | ||
888 | /* | |
889 | * Now that we know that the ISR won't add more work on the | |
890 | * workqueue we can safely flush any outstanding work. | |
891 | */ | |
892 | flush_workqueue(adapter->workqueue); | |
893 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
894 | } | |
895 | ||
896 | /* | |
897 | * We're going to tear down the entire ring structure and set it back | |
898 | * up, so stalling new requests until all completions are flushed and | |
899 | * the rings are back in place. | |
900 | */ | |
901 | ||
902 | pvscsi_process_request_ring(adapter); | |
903 | ||
904 | ll_adapter_reset(adapter); | |
905 | ||
906 | /* | |
907 | * Now process any completions. Note we do this AFTER adapter reset, | |
908 | * which is strange, but stops races where completions get posted | |
909 | * between processing the ring and issuing the reset. The backend will | |
910 | * not touch the ring memory after reset, so the immediately pre-reset | |
911 | * completion ring state is still valid. | |
912 | */ | |
913 | pvscsi_process_completion_ring(adapter); | |
914 | ||
915 | pvscsi_reset_all(adapter); | |
916 | adapter->use_msg = use_msg; | |
917 | pvscsi_setup_all_rings(adapter); | |
918 | pvscsi_unmask_intr(adapter); | |
919 | ||
920 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
921 | ||
922 | return SUCCESS; | |
923 | } | |
924 | ||
925 | static int pvscsi_bus_reset(struct scsi_cmnd *cmd) | |
926 | { | |
927 | struct Scsi_Host *host = cmd->device->host; | |
928 | struct pvscsi_adapter *adapter = shost_priv(host); | |
929 | unsigned long flags; | |
930 | ||
931 | scmd_printk(KERN_INFO, cmd, "SCSI Bus reset\n"); | |
932 | ||
933 | /* | |
934 | * We don't want to queue new requests for this bus after | |
935 | * flushing all pending requests to emulation, since new | |
936 | * requests could then sneak in during this bus reset phase, | |
937 | * so take the lock now. | |
938 | */ | |
939 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
940 | ||
941 | pvscsi_process_request_ring(adapter); | |
942 | ll_bus_reset(adapter); | |
943 | pvscsi_process_completion_ring(adapter); | |
944 | ||
945 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
946 | ||
947 | return SUCCESS; | |
948 | } | |
949 | ||
950 | static int pvscsi_device_reset(struct scsi_cmnd *cmd) | |
951 | { | |
952 | struct Scsi_Host *host = cmd->device->host; | |
953 | struct pvscsi_adapter *adapter = shost_priv(host); | |
954 | unsigned long flags; | |
955 | ||
956 | scmd_printk(KERN_INFO, cmd, "SCSI device reset on scsi%u:%u\n", | |
957 | host->host_no, cmd->device->id); | |
958 | ||
959 | /* | |
960 | * We don't want to queue new requests for this device after flushing | |
961 | * all pending requests to emulation, since new requests could then | |
962 | * sneak in during this device reset phase, so take the lock now. | |
963 | */ | |
964 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
965 | ||
966 | pvscsi_process_request_ring(adapter); | |
967 | ll_device_reset(adapter, cmd->device->id); | |
968 | pvscsi_process_completion_ring(adapter); | |
969 | ||
970 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
971 | ||
972 | return SUCCESS; | |
973 | } | |
974 | ||
975 | static struct scsi_host_template pvscsi_template; | |
976 | ||
977 | static const char *pvscsi_info(struct Scsi_Host *host) | |
978 | { | |
979 | struct pvscsi_adapter *adapter = shost_priv(host); | |
980 | static char buf[256]; | |
981 | ||
982 | sprintf(buf, "VMware PVSCSI storage adapter rev %d, req/cmp/msg rings: " | |
983 | "%u/%u/%u pages, cmd_per_lun=%u", adapter->rev, | |
984 | adapter->req_pages, adapter->cmp_pages, adapter->msg_pages, | |
985 | pvscsi_template.cmd_per_lun); | |
986 | ||
987 | return buf; | |
988 | } | |
989 | ||
990 | static struct scsi_host_template pvscsi_template = { | |
991 | .module = THIS_MODULE, | |
992 | .name = "VMware PVSCSI Host Adapter", | |
993 | .proc_name = "vmw_pvscsi", | |
994 | .info = pvscsi_info, | |
995 | .queuecommand = pvscsi_queue, | |
996 | .this_id = -1, | |
997 | .sg_tablesize = PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT, | |
998 | .dma_boundary = UINT_MAX, | |
999 | .max_sectors = 0xffff, | |
1000 | .use_clustering = ENABLE_CLUSTERING, | |
02845560 | 1001 | .change_queue_depth = pvscsi_change_queue_depth, |
851b1642 AK |
1002 | .eh_abort_handler = pvscsi_abort, |
1003 | .eh_device_reset_handler = pvscsi_device_reset, | |
1004 | .eh_bus_reset_handler = pvscsi_bus_reset, | |
1005 | .eh_host_reset_handler = pvscsi_host_reset, | |
1006 | }; | |
1007 | ||
1008 | static void pvscsi_process_msg(const struct pvscsi_adapter *adapter, | |
1009 | const struct PVSCSIRingMsgDesc *e) | |
1010 | { | |
1011 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1012 | struct Scsi_Host *host = adapter->host; | |
1013 | struct scsi_device *sdev; | |
1014 | ||
1015 | printk(KERN_INFO "vmw_pvscsi: msg type: 0x%x - MSG RING: %u/%u (%u) \n", | |
1016 | e->type, s->msgProdIdx, s->msgConsIdx, s->msgNumEntriesLog2); | |
1017 | ||
1018 | BUILD_BUG_ON(PVSCSI_MSG_LAST != 2); | |
1019 | ||
1020 | if (e->type == PVSCSI_MSG_DEV_ADDED) { | |
1021 | struct PVSCSIMsgDescDevStatusChanged *desc; | |
1022 | desc = (struct PVSCSIMsgDescDevStatusChanged *)e; | |
1023 | ||
1024 | printk(KERN_INFO | |
1025 | "vmw_pvscsi: msg: device added at scsi%u:%u:%u\n", | |
1026 | desc->bus, desc->target, desc->lun[1]); | |
1027 | ||
1028 | if (!scsi_host_get(host)) | |
1029 | return; | |
1030 | ||
1031 | sdev = scsi_device_lookup(host, desc->bus, desc->target, | |
1032 | desc->lun[1]); | |
1033 | if (sdev) { | |
1034 | printk(KERN_INFO "vmw_pvscsi: device already exists\n"); | |
1035 | scsi_device_put(sdev); | |
1036 | } else | |
1037 | scsi_add_device(adapter->host, desc->bus, | |
1038 | desc->target, desc->lun[1]); | |
1039 | ||
1040 | scsi_host_put(host); | |
1041 | } else if (e->type == PVSCSI_MSG_DEV_REMOVED) { | |
1042 | struct PVSCSIMsgDescDevStatusChanged *desc; | |
1043 | desc = (struct PVSCSIMsgDescDevStatusChanged *)e; | |
1044 | ||
1045 | printk(KERN_INFO | |
1046 | "vmw_pvscsi: msg: device removed at scsi%u:%u:%u\n", | |
1047 | desc->bus, desc->target, desc->lun[1]); | |
1048 | ||
1049 | if (!scsi_host_get(host)) | |
1050 | return; | |
1051 | ||
1052 | sdev = scsi_device_lookup(host, desc->bus, desc->target, | |
1053 | desc->lun[1]); | |
1054 | if (sdev) { | |
1055 | scsi_remove_device(sdev); | |
1056 | scsi_device_put(sdev); | |
1057 | } else | |
1058 | printk(KERN_INFO | |
1059 | "vmw_pvscsi: failed to lookup scsi%u:%u:%u\n", | |
1060 | desc->bus, desc->target, desc->lun[1]); | |
1061 | ||
1062 | scsi_host_put(host); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static int pvscsi_msg_pending(const struct pvscsi_adapter *adapter) | |
1067 | { | |
1068 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1069 | ||
1070 | return s->msgProdIdx != s->msgConsIdx; | |
1071 | } | |
1072 | ||
1073 | static void pvscsi_process_msg_ring(const struct pvscsi_adapter *adapter) | |
1074 | { | |
1075 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1076 | struct PVSCSIRingMsgDesc *ring = adapter->msg_ring; | |
1077 | u32 msg_entries = s->msgNumEntriesLog2; | |
1078 | ||
1079 | while (pvscsi_msg_pending(adapter)) { | |
1080 | struct PVSCSIRingMsgDesc *e = ring + (s->msgConsIdx & | |
1081 | MASK(msg_entries)); | |
1082 | ||
1083 | barrier(); | |
1084 | pvscsi_process_msg(adapter, e); | |
1085 | barrier(); | |
1086 | s->msgConsIdx++; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | static void pvscsi_msg_workqueue_handler(struct work_struct *data) | |
1091 | { | |
1092 | struct pvscsi_adapter *adapter; | |
1093 | ||
1094 | adapter = container_of(data, struct pvscsi_adapter, work); | |
1095 | ||
1096 | pvscsi_process_msg_ring(adapter); | |
1097 | } | |
1098 | ||
1099 | static int pvscsi_setup_msg_workqueue(struct pvscsi_adapter *adapter) | |
1100 | { | |
1101 | char name[32]; | |
1102 | ||
1103 | if (!pvscsi_use_msg) | |
1104 | return 0; | |
1105 | ||
1106 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, | |
1107 | PVSCSI_CMD_SETUP_MSG_RING); | |
1108 | ||
1109 | if (pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS) == -1) | |
1110 | return 0; | |
1111 | ||
1112 | snprintf(name, sizeof(name), | |
1113 | "vmw_pvscsi_wq_%u", adapter->host->host_no); | |
1114 | ||
1115 | adapter->workqueue = create_singlethread_workqueue(name); | |
1116 | if (!adapter->workqueue) { | |
1117 | printk(KERN_ERR "vmw_pvscsi: failed to create work queue\n"); | |
1118 | return 0; | |
1119 | } | |
1120 | INIT_WORK(&adapter->work, pvscsi_msg_workqueue_handler); | |
1121 | ||
1122 | return 1; | |
1123 | } | |
1124 | ||
2a815b5a RM |
1125 | static bool pvscsi_setup_req_threshold(struct pvscsi_adapter *adapter, |
1126 | bool enable) | |
1127 | { | |
1128 | u32 val; | |
1129 | ||
1130 | if (!pvscsi_use_req_threshold) | |
1131 | return false; | |
1132 | ||
1133 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, | |
1134 | PVSCSI_CMD_SETUP_REQCALLTHRESHOLD); | |
1135 | val = pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS); | |
1136 | if (val == -1) { | |
1137 | printk(KERN_INFO "vmw_pvscsi: device does not support req_threshold\n"); | |
1138 | return false; | |
1139 | } else { | |
1140 | struct PVSCSICmdDescSetupReqCall cmd_msg = { 0 }; | |
1141 | cmd_msg.enable = enable; | |
1142 | printk(KERN_INFO | |
1143 | "vmw_pvscsi: %sabling reqCallThreshold\n", | |
1144 | enable ? "en" : "dis"); | |
1145 | pvscsi_write_cmd_desc(adapter, | |
1146 | PVSCSI_CMD_SETUP_REQCALLTHRESHOLD, | |
1147 | &cmd_msg, sizeof(cmd_msg)); | |
1148 | return pvscsi_reg_read(adapter, | |
1149 | PVSCSI_REG_OFFSET_COMMAND_STATUS) != 0; | |
1150 | } | |
1151 | } | |
1152 | ||
851b1642 AK |
1153 | static irqreturn_t pvscsi_isr(int irq, void *devp) |
1154 | { | |
1155 | struct pvscsi_adapter *adapter = devp; | |
1156 | int handled; | |
1157 | ||
1158 | if (adapter->use_msi || adapter->use_msix) | |
1159 | handled = true; | |
1160 | else { | |
1161 | u32 val = pvscsi_read_intr_status(adapter); | |
1162 | handled = (val & PVSCSI_INTR_ALL_SUPPORTED) != 0; | |
1163 | if (handled) | |
1164 | pvscsi_write_intr_status(devp, val); | |
1165 | } | |
1166 | ||
1167 | if (handled) { | |
1168 | unsigned long flags; | |
1169 | ||
1170 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
1171 | ||
1172 | pvscsi_process_completion_ring(adapter); | |
1173 | if (adapter->use_msg && pvscsi_msg_pending(adapter)) | |
1174 | queue_work(adapter->workqueue, &adapter->work); | |
1175 | ||
1176 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
1177 | } | |
1178 | ||
1179 | return IRQ_RETVAL(handled); | |
1180 | } | |
1181 | ||
1182 | static void pvscsi_free_sgls(const struct pvscsi_adapter *adapter) | |
1183 | { | |
1184 | struct pvscsi_ctx *ctx = adapter->cmd_map; | |
1185 | unsigned i; | |
1186 | ||
1187 | for (i = 0; i < adapter->req_depth; ++i, ++ctx) | |
1188 | free_pages((unsigned long)ctx->sgl, get_order(SGL_SIZE)); | |
1189 | } | |
1190 | ||
d0e2ddff DT |
1191 | static int pvscsi_setup_msix(const struct pvscsi_adapter *adapter, |
1192 | unsigned int *irq) | |
851b1642 AK |
1193 | { |
1194 | struct msix_entry entry = { 0, PVSCSI_VECTOR_COMPLETION }; | |
1195 | int ret; | |
1196 | ||
1197 | ret = pci_enable_msix(adapter->dev, &entry, 1); | |
1198 | if (ret) | |
1199 | return ret; | |
1200 | ||
1201 | *irq = entry.vector; | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | static void pvscsi_shutdown_intr(struct pvscsi_adapter *adapter) | |
1207 | { | |
1208 | if (adapter->irq) { | |
1209 | free_irq(adapter->irq, adapter); | |
1210 | adapter->irq = 0; | |
1211 | } | |
1212 | if (adapter->use_msi) { | |
1213 | pci_disable_msi(adapter->dev); | |
1214 | adapter->use_msi = 0; | |
1215 | } else if (adapter->use_msix) { | |
1216 | pci_disable_msix(adapter->dev); | |
1217 | adapter->use_msix = 0; | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | static void pvscsi_release_resources(struct pvscsi_adapter *adapter) | |
1222 | { | |
1223 | pvscsi_shutdown_intr(adapter); | |
1224 | ||
1225 | if (adapter->workqueue) | |
1226 | destroy_workqueue(adapter->workqueue); | |
1227 | ||
1228 | if (adapter->mmioBase) | |
1229 | pci_iounmap(adapter->dev, adapter->mmioBase); | |
1230 | ||
1231 | pci_release_regions(adapter->dev); | |
1232 | ||
1233 | if (adapter->cmd_map) { | |
1234 | pvscsi_free_sgls(adapter); | |
1235 | kfree(adapter->cmd_map); | |
1236 | } | |
1237 | ||
1238 | if (adapter->rings_state) | |
1239 | pci_free_consistent(adapter->dev, PAGE_SIZE, | |
1240 | adapter->rings_state, adapter->ringStatePA); | |
1241 | ||
1242 | if (adapter->req_ring) | |
1243 | pci_free_consistent(adapter->dev, | |
1244 | adapter->req_pages * PAGE_SIZE, | |
1245 | adapter->req_ring, adapter->reqRingPA); | |
1246 | ||
1247 | if (adapter->cmp_ring) | |
1248 | pci_free_consistent(adapter->dev, | |
1249 | adapter->cmp_pages * PAGE_SIZE, | |
1250 | adapter->cmp_ring, adapter->cmpRingPA); | |
1251 | ||
1252 | if (adapter->msg_ring) | |
1253 | pci_free_consistent(adapter->dev, | |
1254 | adapter->msg_pages * PAGE_SIZE, | |
1255 | adapter->msg_ring, adapter->msgRingPA); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Allocate scatter gather lists. | |
1260 | * | |
1261 | * These are statically allocated. Trying to be clever was not worth it. | |
1262 | * | |
42b2aa86 | 1263 | * Dynamic allocation can fail, and we can't go deep into the memory |
851b1642 AK |
1264 | * allocator, since we're a SCSI driver, and trying too hard to allocate |
1265 | * memory might generate disk I/O. We also don't want to fail disk I/O | |
1266 | * in that case because we can't get an allocation - the I/O could be | |
1267 | * trying to swap out data to free memory. Since that is pathological, | |
1268 | * just use a statically allocated scatter list. | |
1269 | * | |
1270 | */ | |
6f039790 | 1271 | static int pvscsi_allocate_sg(struct pvscsi_adapter *adapter) |
851b1642 AK |
1272 | { |
1273 | struct pvscsi_ctx *ctx; | |
1274 | int i; | |
1275 | ||
1276 | ctx = adapter->cmd_map; | |
1277 | BUILD_BUG_ON(sizeof(struct pvscsi_sg_list) > SGL_SIZE); | |
1278 | ||
1279 | for (i = 0; i < adapter->req_depth; ++i, ++ctx) { | |
1280 | ctx->sgl = (void *)__get_free_pages(GFP_KERNEL, | |
1281 | get_order(SGL_SIZE)); | |
1282 | ctx->sglPA = 0; | |
1283 | BUG_ON(!IS_ALIGNED(((unsigned long)ctx->sgl), PAGE_SIZE)); | |
1284 | if (!ctx->sgl) { | |
1285 | for (; i >= 0; --i, --ctx) { | |
1286 | free_pages((unsigned long)ctx->sgl, | |
1287 | get_order(SGL_SIZE)); | |
1288 | ctx->sgl = NULL; | |
1289 | } | |
1290 | return -ENOMEM; | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
a9310735 AK |
1297 | /* |
1298 | * Query the device, fetch the config info and return the | |
1299 | * maximum number of targets on the adapter. In case of | |
1300 | * failure due to any reason return default i.e. 16. | |
1301 | */ | |
1302 | static u32 pvscsi_get_max_targets(struct pvscsi_adapter *adapter) | |
1303 | { | |
1304 | struct PVSCSICmdDescConfigCmd cmd; | |
1305 | struct PVSCSIConfigPageHeader *header; | |
1306 | struct device *dev; | |
1307 | dma_addr_t configPagePA; | |
1308 | void *config_page; | |
1309 | u32 numPhys = 16; | |
1310 | ||
1311 | dev = pvscsi_dev(adapter); | |
1312 | config_page = pci_alloc_consistent(adapter->dev, PAGE_SIZE, | |
1313 | &configPagePA); | |
1314 | if (!config_page) { | |
1315 | dev_warn(dev, "vmw_pvscsi: failed to allocate memory for config page\n"); | |
1316 | goto exit; | |
1317 | } | |
1318 | BUG_ON(configPagePA & ~PAGE_MASK); | |
1319 | ||
1320 | /* Fetch config info from the device. */ | |
1321 | cmd.configPageAddress = ((u64)PVSCSI_CONFIG_CONTROLLER_ADDRESS) << 32; | |
1322 | cmd.configPageNum = PVSCSI_CONFIG_PAGE_CONTROLLER; | |
1323 | cmd.cmpAddr = configPagePA; | |
1324 | cmd._pad = 0; | |
1325 | ||
1326 | /* | |
1327 | * Mark the completion page header with error values. If the device | |
1328 | * completes the command successfully, it sets the status values to | |
1329 | * indicate success. | |
1330 | */ | |
1331 | header = config_page; | |
1332 | memset(header, 0, sizeof *header); | |
1333 | header->hostStatus = BTSTAT_INVPARAM; | |
1334 | header->scsiStatus = SDSTAT_CHECK; | |
1335 | ||
1336 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_CONFIG, &cmd, sizeof cmd); | |
1337 | ||
1338 | if (header->hostStatus == BTSTAT_SUCCESS && | |
1339 | header->scsiStatus == SDSTAT_GOOD) { | |
1340 | struct PVSCSIConfigPageController *config; | |
1341 | ||
1342 | config = config_page; | |
1343 | numPhys = config->numPhys; | |
1344 | } else | |
1345 | dev_warn(dev, "vmw_pvscsi: PVSCSI_CMD_CONFIG failed. hostStatus = 0x%x, scsiStatus = 0x%x\n", | |
1346 | header->hostStatus, header->scsiStatus); | |
1347 | pci_free_consistent(adapter->dev, PAGE_SIZE, config_page, configPagePA); | |
1348 | exit: | |
1349 | return numPhys; | |
1350 | } | |
1351 | ||
6f039790 | 1352 | static int pvscsi_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
851b1642 AK |
1353 | { |
1354 | struct pvscsi_adapter *adapter; | |
02845560 AK |
1355 | struct pvscsi_adapter adapter_temp; |
1356 | struct Scsi_Host *host = NULL; | |
851b1642 AK |
1357 | unsigned int i; |
1358 | unsigned long flags = 0; | |
1359 | int error; | |
02845560 | 1360 | u32 max_id; |
851b1642 AK |
1361 | |
1362 | error = -ENODEV; | |
1363 | ||
1364 | if (pci_enable_device(pdev)) | |
1365 | return error; | |
1366 | ||
1367 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0 && | |
1368 | pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { | |
1369 | printk(KERN_INFO "vmw_pvscsi: using 64bit dma\n"); | |
1370 | } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) == 0 && | |
1371 | pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) == 0) { | |
1372 | printk(KERN_INFO "vmw_pvscsi: using 32bit dma\n"); | |
1373 | } else { | |
1374 | printk(KERN_ERR "vmw_pvscsi: failed to set DMA mask\n"); | |
1375 | goto out_disable_device; | |
1376 | } | |
1377 | ||
02845560 AK |
1378 | /* |
1379 | * Let's use a temp pvscsi_adapter struct until we find the number of | |
1380 | * targets on the adapter, after that we will switch to the real | |
1381 | * allocated struct. | |
1382 | */ | |
1383 | adapter = &adapter_temp; | |
851b1642 AK |
1384 | memset(adapter, 0, sizeof(*adapter)); |
1385 | adapter->dev = pdev; | |
851b1642 AK |
1386 | adapter->rev = pdev->revision; |
1387 | ||
1388 | if (pci_request_regions(pdev, "vmw_pvscsi")) { | |
1389 | printk(KERN_ERR "vmw_pvscsi: pci memory selection failed\n"); | |
02845560 | 1390 | goto out_disable_device; |
851b1642 AK |
1391 | } |
1392 | ||
1393 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
1394 | if ((pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)) | |
1395 | continue; | |
1396 | ||
1397 | if (pci_resource_len(pdev, i) < PVSCSI_MEM_SPACE_SIZE) | |
1398 | continue; | |
1399 | ||
1400 | break; | |
1401 | } | |
1402 | ||
1403 | if (i == DEVICE_COUNT_RESOURCE) { | |
1404 | printk(KERN_ERR | |
1405 | "vmw_pvscsi: adapter has no suitable MMIO region\n"); | |
02845560 | 1406 | goto out_release_resources_and_disable; |
851b1642 AK |
1407 | } |
1408 | ||
1409 | adapter->mmioBase = pci_iomap(pdev, i, PVSCSI_MEM_SPACE_SIZE); | |
1410 | ||
1411 | if (!adapter->mmioBase) { | |
1412 | printk(KERN_ERR | |
1413 | "vmw_pvscsi: can't iomap for BAR %d memsize %lu\n", | |
1414 | i, PVSCSI_MEM_SPACE_SIZE); | |
02845560 | 1415 | goto out_release_resources_and_disable; |
851b1642 AK |
1416 | } |
1417 | ||
1418 | pci_set_master(pdev); | |
02845560 AK |
1419 | |
1420 | /* | |
1421 | * Ask the device for max number of targets before deciding the | |
1422 | * default pvscsi_ring_pages value. | |
1423 | */ | |
1424 | max_id = pvscsi_get_max_targets(adapter); | |
1425 | printk(KERN_INFO "vmw_pvscsi: max_id: %u\n", max_id); | |
1426 | ||
1427 | if (pvscsi_ring_pages == 0) | |
1428 | /* | |
1429 | * Set the right default value. Up to 16 it is 8, above it is | |
1430 | * max. | |
1431 | */ | |
1432 | pvscsi_ring_pages = (max_id > 16) ? | |
1433 | PVSCSI_SETUP_RINGS_MAX_NUM_PAGES : | |
1434 | PVSCSI_DEFAULT_NUM_PAGES_PER_RING; | |
1435 | printk(KERN_INFO | |
1436 | "vmw_pvscsi: setting ring_pages to %d\n", | |
1437 | pvscsi_ring_pages); | |
1438 | ||
1439 | pvscsi_template.can_queue = | |
1440 | min(PVSCSI_MAX_NUM_PAGES_REQ_RING, pvscsi_ring_pages) * | |
1441 | PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE; | |
1442 | pvscsi_template.cmd_per_lun = | |
1443 | min(pvscsi_template.can_queue, pvscsi_cmd_per_lun); | |
1444 | host = scsi_host_alloc(&pvscsi_template, sizeof(struct pvscsi_adapter)); | |
1445 | if (!host) { | |
1446 | printk(KERN_ERR "vmw_pvscsi: failed to allocate host\n"); | |
1447 | goto out_release_resources_and_disable; | |
1448 | } | |
1449 | ||
1450 | /* | |
1451 | * Let's use the real pvscsi_adapter struct here onwards. | |
1452 | */ | |
1453 | adapter = shost_priv(host); | |
1454 | memset(adapter, 0, sizeof(*adapter)); | |
1455 | adapter->dev = pdev; | |
1456 | adapter->host = host; | |
1457 | /* | |
1458 | * Copy back what we already have to the allocated adapter struct. | |
1459 | */ | |
1460 | adapter->rev = adapter_temp.rev; | |
1461 | adapter->mmioBase = adapter_temp.mmioBase; | |
1462 | ||
1463 | spin_lock_init(&adapter->hw_lock); | |
1464 | host->max_channel = 0; | |
1465 | host->max_lun = 1; | |
1466 | host->max_cmd_len = 16; | |
1467 | host->max_id = max_id; | |
1468 | ||
851b1642 AK |
1469 | pci_set_drvdata(pdev, host); |
1470 | ||
1471 | ll_adapter_reset(adapter); | |
1472 | ||
1473 | adapter->use_msg = pvscsi_setup_msg_workqueue(adapter); | |
1474 | ||
1475 | error = pvscsi_allocate_rings(adapter); | |
1476 | if (error) { | |
1477 | printk(KERN_ERR "vmw_pvscsi: unable to allocate ring memory\n"); | |
1478 | goto out_release_resources; | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * From this point on we should reset the adapter if anything goes | |
1483 | * wrong. | |
1484 | */ | |
1485 | pvscsi_setup_all_rings(adapter); | |
1486 | ||
1487 | adapter->cmd_map = kcalloc(adapter->req_depth, | |
1488 | sizeof(struct pvscsi_ctx), GFP_KERNEL); | |
1489 | if (!adapter->cmd_map) { | |
1490 | printk(KERN_ERR "vmw_pvscsi: failed to allocate memory.\n"); | |
1491 | error = -ENOMEM; | |
1492 | goto out_reset_adapter; | |
1493 | } | |
1494 | ||
1495 | INIT_LIST_HEAD(&adapter->cmd_pool); | |
1496 | for (i = 0; i < adapter->req_depth; i++) { | |
1497 | struct pvscsi_ctx *ctx = adapter->cmd_map + i; | |
1498 | list_add(&ctx->list, &adapter->cmd_pool); | |
1499 | } | |
1500 | ||
1501 | error = pvscsi_allocate_sg(adapter); | |
1502 | if (error) { | |
1503 | printk(KERN_ERR "vmw_pvscsi: unable to allocate s/g table\n"); | |
1504 | goto out_reset_adapter; | |
1505 | } | |
1506 | ||
1507 | if (!pvscsi_disable_msix && | |
1508 | pvscsi_setup_msix(adapter, &adapter->irq) == 0) { | |
1509 | printk(KERN_INFO "vmw_pvscsi: using MSI-X\n"); | |
1510 | adapter->use_msix = 1; | |
1511 | } else if (!pvscsi_disable_msi && pci_enable_msi(pdev) == 0) { | |
1512 | printk(KERN_INFO "vmw_pvscsi: using MSI\n"); | |
1513 | adapter->use_msi = 1; | |
1514 | adapter->irq = pdev->irq; | |
1515 | } else { | |
1516 | printk(KERN_INFO "vmw_pvscsi: using INTx\n"); | |
1517 | adapter->irq = pdev->irq; | |
1518 | flags = IRQF_SHARED; | |
1519 | } | |
1520 | ||
2a815b5a RM |
1521 | adapter->use_req_threshold = pvscsi_setup_req_threshold(adapter, true); |
1522 | printk(KERN_DEBUG "vmw_pvscsi: driver-based request coalescing %sabled\n", | |
1523 | adapter->use_req_threshold ? "en" : "dis"); | |
1524 | ||
851b1642 AK |
1525 | error = request_irq(adapter->irq, pvscsi_isr, flags, |
1526 | "vmw_pvscsi", adapter); | |
1527 | if (error) { | |
1528 | printk(KERN_ERR | |
1529 | "vmw_pvscsi: unable to request IRQ: %d\n", error); | |
1530 | adapter->irq = 0; | |
1531 | goto out_reset_adapter; | |
1532 | } | |
1533 | ||
1534 | error = scsi_add_host(host, &pdev->dev); | |
1535 | if (error) { | |
1536 | printk(KERN_ERR | |
1537 | "vmw_pvscsi: scsi_add_host failed: %d\n", error); | |
1538 | goto out_reset_adapter; | |
1539 | } | |
1540 | ||
1541 | dev_info(&pdev->dev, "VMware PVSCSI rev %d host #%u\n", | |
1542 | adapter->rev, host->host_no); | |
1543 | ||
1544 | pvscsi_unmask_intr(adapter); | |
1545 | ||
1546 | scsi_scan_host(host); | |
1547 | ||
1548 | return 0; | |
1549 | ||
1550 | out_reset_adapter: | |
1551 | ll_adapter_reset(adapter); | |
1552 | out_release_resources: | |
1553 | pvscsi_release_resources(adapter); | |
851b1642 AK |
1554 | scsi_host_put(host); |
1555 | out_disable_device: | |
851b1642 AK |
1556 | pci_disable_device(pdev); |
1557 | ||
1558 | return error; | |
02845560 AK |
1559 | |
1560 | out_release_resources_and_disable: | |
1561 | pvscsi_release_resources(adapter); | |
1562 | goto out_disable_device; | |
851b1642 AK |
1563 | } |
1564 | ||
1565 | static void __pvscsi_shutdown(struct pvscsi_adapter *adapter) | |
1566 | { | |
1567 | pvscsi_mask_intr(adapter); | |
1568 | ||
1569 | if (adapter->workqueue) | |
1570 | flush_workqueue(adapter->workqueue); | |
1571 | ||
1572 | pvscsi_shutdown_intr(adapter); | |
1573 | ||
1574 | pvscsi_process_request_ring(adapter); | |
1575 | pvscsi_process_completion_ring(adapter); | |
1576 | ll_adapter_reset(adapter); | |
1577 | } | |
1578 | ||
1579 | static void pvscsi_shutdown(struct pci_dev *dev) | |
1580 | { | |
1581 | struct Scsi_Host *host = pci_get_drvdata(dev); | |
1582 | struct pvscsi_adapter *adapter = shost_priv(host); | |
1583 | ||
1584 | __pvscsi_shutdown(adapter); | |
1585 | } | |
1586 | ||
1587 | static void pvscsi_remove(struct pci_dev *pdev) | |
1588 | { | |
1589 | struct Scsi_Host *host = pci_get_drvdata(pdev); | |
1590 | struct pvscsi_adapter *adapter = shost_priv(host); | |
1591 | ||
1592 | scsi_remove_host(host); | |
1593 | ||
1594 | __pvscsi_shutdown(adapter); | |
1595 | pvscsi_release_resources(adapter); | |
1596 | ||
1597 | scsi_host_put(host); | |
1598 | ||
851b1642 AK |
1599 | pci_disable_device(pdev); |
1600 | } | |
1601 | ||
1602 | static struct pci_driver pvscsi_pci_driver = { | |
1603 | .name = "vmw_pvscsi", | |
1604 | .id_table = pvscsi_pci_tbl, | |
1605 | .probe = pvscsi_probe, | |
6f039790 | 1606 | .remove = pvscsi_remove, |
851b1642 AK |
1607 | .shutdown = pvscsi_shutdown, |
1608 | }; | |
1609 | ||
1610 | static int __init pvscsi_init(void) | |
1611 | { | |
1612 | pr_info("%s - version %s\n", | |
1613 | PVSCSI_LINUX_DRIVER_DESC, PVSCSI_DRIVER_VERSION_STRING); | |
1614 | return pci_register_driver(&pvscsi_pci_driver); | |
1615 | } | |
1616 | ||
1617 | static void __exit pvscsi_exit(void) | |
1618 | { | |
1619 | pci_unregister_driver(&pvscsi_pci_driver); | |
1620 | } | |
1621 | ||
1622 | module_init(pvscsi_init); | |
1623 | module_exit(pvscsi_exit); |