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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 | * | |
851b1642 AK |
20 | */ |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/interrupt.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
851b1642 AK |
26 | #include <linux/workqueue.h> |
27 | #include <linux/pci.h> | |
28 | ||
29 | #include <scsi/scsi.h> | |
30 | #include <scsi/scsi_host.h> | |
31 | #include <scsi/scsi_cmnd.h> | |
32 | #include <scsi/scsi_device.h> | |
02845560 | 33 | #include <scsi/scsi_tcq.h> |
851b1642 AK |
34 | |
35 | #include "vmw_pvscsi.h" | |
36 | ||
37 | #define PVSCSI_LINUX_DRIVER_DESC "VMware PVSCSI driver" | |
38 | ||
39 | MODULE_DESCRIPTION(PVSCSI_LINUX_DRIVER_DESC); | |
40 | MODULE_AUTHOR("VMware, Inc."); | |
41 | MODULE_LICENSE("GPL"); | |
42 | MODULE_VERSION(PVSCSI_DRIVER_VERSION_STRING); | |
43 | ||
44 | #define PVSCSI_DEFAULT_NUM_PAGES_PER_RING 8 | |
45 | #define PVSCSI_DEFAULT_NUM_PAGES_MSG_RING 1 | |
02845560 | 46 | #define PVSCSI_DEFAULT_QUEUE_DEPTH 254 |
851b1642 AK |
47 | #define SGL_SIZE PAGE_SIZE |
48 | ||
49 | struct pvscsi_sg_list { | |
50 | struct PVSCSISGElement sge[PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT]; | |
51 | }; | |
52 | ||
53 | struct pvscsi_ctx { | |
54 | /* | |
55 | * The index of the context in cmd_map serves as the context ID for a | |
56 | * 1-to-1 mapping completions back to requests. | |
57 | */ | |
58 | struct scsi_cmnd *cmd; | |
59 | struct pvscsi_sg_list *sgl; | |
60 | struct list_head list; | |
61 | dma_addr_t dataPA; | |
62 | dma_addr_t sensePA; | |
63 | dma_addr_t sglPA; | |
a2713cce | 64 | struct completion *abort_cmp; |
851b1642 AK |
65 | }; |
66 | ||
67 | struct pvscsi_adapter { | |
68 | char *mmioBase; | |
851b1642 | 69 | u8 rev; |
851b1642 | 70 | bool use_msg; |
2a815b5a | 71 | bool use_req_threshold; |
851b1642 AK |
72 | |
73 | spinlock_t hw_lock; | |
74 | ||
75 | struct workqueue_struct *workqueue; | |
76 | struct work_struct work; | |
77 | ||
78 | struct PVSCSIRingReqDesc *req_ring; | |
79 | unsigned req_pages; | |
80 | unsigned req_depth; | |
81 | dma_addr_t reqRingPA; | |
82 | ||
83 | struct PVSCSIRingCmpDesc *cmp_ring; | |
84 | unsigned cmp_pages; | |
85 | dma_addr_t cmpRingPA; | |
86 | ||
87 | struct PVSCSIRingMsgDesc *msg_ring; | |
88 | unsigned msg_pages; | |
89 | dma_addr_t msgRingPA; | |
90 | ||
91 | struct PVSCSIRingsState *rings_state; | |
92 | dma_addr_t ringStatePA; | |
93 | ||
94 | struct pci_dev *dev; | |
95 | struct Scsi_Host *host; | |
96 | ||
97 | struct list_head cmd_pool; | |
98 | struct pvscsi_ctx *cmd_map; | |
99 | }; | |
100 | ||
101 | ||
102 | /* Command line parameters */ | |
02845560 | 103 | static int pvscsi_ring_pages; |
851b1642 AK |
104 | static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; |
105 | static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; | |
106 | static bool pvscsi_disable_msi; | |
107 | static bool pvscsi_disable_msix; | |
108 | static bool pvscsi_use_msg = true; | |
2a815b5a | 109 | static bool pvscsi_use_req_threshold = true; |
851b1642 AK |
110 | |
111 | #define PVSCSI_RW (S_IRUSR | S_IWUSR) | |
112 | ||
113 | module_param_named(ring_pages, pvscsi_ring_pages, int, PVSCSI_RW); | |
114 | MODULE_PARM_DESC(ring_pages, "Number of pages per req/cmp ring - (default=" | |
02845560 AK |
115 | __stringify(PVSCSI_DEFAULT_NUM_PAGES_PER_RING) |
116 | "[up to 16 targets]," | |
117 | __stringify(PVSCSI_SETUP_RINGS_MAX_NUM_PAGES) | |
118 | "[for 16+ targets])"); | |
851b1642 AK |
119 | |
120 | module_param_named(msg_ring_pages, pvscsi_msg_ring_pages, int, PVSCSI_RW); | |
121 | MODULE_PARM_DESC(msg_ring_pages, "Number of pages for the msg ring - (default=" | |
122 | __stringify(PVSCSI_DEFAULT_NUM_PAGES_MSG_RING) ")"); | |
123 | ||
124 | module_param_named(cmd_per_lun, pvscsi_cmd_per_lun, int, PVSCSI_RW); | |
125 | MODULE_PARM_DESC(cmd_per_lun, "Maximum commands per lun - (default=" | |
02845560 | 126 | __stringify(PVSCSI_DEFAULT_QUEUE_DEPTH) ")"); |
851b1642 AK |
127 | |
128 | module_param_named(disable_msi, pvscsi_disable_msi, bool, PVSCSI_RW); | |
129 | MODULE_PARM_DESC(disable_msi, "Disable MSI use in driver - (default=0)"); | |
130 | ||
131 | module_param_named(disable_msix, pvscsi_disable_msix, bool, PVSCSI_RW); | |
132 | MODULE_PARM_DESC(disable_msix, "Disable MSI-X use in driver - (default=0)"); | |
133 | ||
134 | module_param_named(use_msg, pvscsi_use_msg, bool, PVSCSI_RW); | |
135 | MODULE_PARM_DESC(use_msg, "Use msg ring when available - (default=1)"); | |
136 | ||
2a815b5a RM |
137 | module_param_named(use_req_threshold, pvscsi_use_req_threshold, |
138 | bool, PVSCSI_RW); | |
139 | MODULE_PARM_DESC(use_req_threshold, "Use driver-based request coalescing if configured - (default=1)"); | |
140 | ||
851b1642 AK |
141 | static const struct pci_device_id pvscsi_pci_tbl[] = { |
142 | { PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_PVSCSI) }, | |
143 | { 0 } | |
144 | }; | |
145 | ||
146 | MODULE_DEVICE_TABLE(pci, pvscsi_pci_tbl); | |
147 | ||
148 | static struct device * | |
149 | pvscsi_dev(const struct pvscsi_adapter *adapter) | |
150 | { | |
151 | return &(adapter->dev->dev); | |
152 | } | |
153 | ||
154 | static struct pvscsi_ctx * | |
155 | pvscsi_find_context(const struct pvscsi_adapter *adapter, struct scsi_cmnd *cmd) | |
156 | { | |
157 | struct pvscsi_ctx *ctx, *end; | |
158 | ||
159 | end = &adapter->cmd_map[adapter->req_depth]; | |
160 | for (ctx = adapter->cmd_map; ctx < end; ctx++) | |
161 | if (ctx->cmd == cmd) | |
162 | return ctx; | |
163 | ||
164 | return NULL; | |
165 | } | |
166 | ||
167 | static struct pvscsi_ctx * | |
168 | pvscsi_acquire_context(struct pvscsi_adapter *adapter, struct scsi_cmnd *cmd) | |
169 | { | |
170 | struct pvscsi_ctx *ctx; | |
171 | ||
172 | if (list_empty(&adapter->cmd_pool)) | |
173 | return NULL; | |
174 | ||
175 | ctx = list_first_entry(&adapter->cmd_pool, struct pvscsi_ctx, list); | |
176 | ctx->cmd = cmd; | |
177 | list_del(&ctx->list); | |
178 | ||
179 | return ctx; | |
180 | } | |
181 | ||
182 | static void pvscsi_release_context(struct pvscsi_adapter *adapter, | |
183 | struct pvscsi_ctx *ctx) | |
184 | { | |
185 | ctx->cmd = NULL; | |
a2713cce | 186 | ctx->abort_cmp = NULL; |
851b1642 AK |
187 | list_add(&ctx->list, &adapter->cmd_pool); |
188 | } | |
189 | ||
190 | /* | |
191 | * Map a pvscsi_ctx struct to a context ID field value; we map to a simple | |
192 | * non-zero integer. ctx always points to an entry in cmd_map array, hence | |
193 | * the return value is always >=1. | |
194 | */ | |
195 | static u64 pvscsi_map_context(const struct pvscsi_adapter *adapter, | |
196 | const struct pvscsi_ctx *ctx) | |
197 | { | |
198 | return ctx - adapter->cmd_map + 1; | |
199 | } | |
200 | ||
201 | static struct pvscsi_ctx * | |
202 | pvscsi_get_context(const struct pvscsi_adapter *adapter, u64 context) | |
203 | { | |
204 | return &adapter->cmd_map[context - 1]; | |
205 | } | |
206 | ||
207 | static void pvscsi_reg_write(const struct pvscsi_adapter *adapter, | |
208 | u32 offset, u32 val) | |
209 | { | |
210 | writel(val, adapter->mmioBase + offset); | |
211 | } | |
212 | ||
213 | static u32 pvscsi_reg_read(const struct pvscsi_adapter *adapter, u32 offset) | |
214 | { | |
215 | return readl(adapter->mmioBase + offset); | |
216 | } | |
217 | ||
218 | static u32 pvscsi_read_intr_status(const struct pvscsi_adapter *adapter) | |
219 | { | |
220 | return pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_INTR_STATUS); | |
221 | } | |
222 | ||
223 | static void pvscsi_write_intr_status(const struct pvscsi_adapter *adapter, | |
224 | u32 val) | |
225 | { | |
226 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_STATUS, val); | |
227 | } | |
228 | ||
229 | static void pvscsi_unmask_intr(const struct pvscsi_adapter *adapter) | |
230 | { | |
231 | u32 intr_bits; | |
232 | ||
233 | intr_bits = PVSCSI_INTR_CMPL_MASK; | |
234 | if (adapter->use_msg) | |
235 | intr_bits |= PVSCSI_INTR_MSG_MASK; | |
236 | ||
237 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_MASK, intr_bits); | |
238 | } | |
239 | ||
240 | static void pvscsi_mask_intr(const struct pvscsi_adapter *adapter) | |
241 | { | |
242 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_INTR_MASK, 0); | |
243 | } | |
244 | ||
245 | static void pvscsi_write_cmd_desc(const struct pvscsi_adapter *adapter, | |
246 | u32 cmd, const void *desc, size_t len) | |
247 | { | |
248 | const u32 *ptr = desc; | |
249 | size_t i; | |
250 | ||
251 | len /= sizeof(*ptr); | |
252 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, cmd); | |
253 | for (i = 0; i < len; i++) | |
254 | pvscsi_reg_write(adapter, | |
255 | PVSCSI_REG_OFFSET_COMMAND_DATA, ptr[i]); | |
256 | } | |
257 | ||
258 | static void pvscsi_abort_cmd(const struct pvscsi_adapter *adapter, | |
259 | const struct pvscsi_ctx *ctx) | |
260 | { | |
261 | struct PVSCSICmdDescAbortCmd cmd = { 0 }; | |
262 | ||
263 | cmd.target = ctx->cmd->device->id; | |
264 | cmd.context = pvscsi_map_context(adapter, ctx); | |
265 | ||
266 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_ABORT_CMD, &cmd, sizeof(cmd)); | |
267 | } | |
268 | ||
269 | static void pvscsi_kick_rw_io(const struct pvscsi_adapter *adapter) | |
270 | { | |
271 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_KICK_RW_IO, 0); | |
272 | } | |
273 | ||
274 | static void pvscsi_process_request_ring(const struct pvscsi_adapter *adapter) | |
275 | { | |
276 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_KICK_NON_RW_IO, 0); | |
277 | } | |
278 | ||
279 | static int scsi_is_rw(unsigned char op) | |
280 | { | |
281 | return op == READ_6 || op == WRITE_6 || | |
282 | op == READ_10 || op == WRITE_10 || | |
283 | op == READ_12 || op == WRITE_12 || | |
284 | op == READ_16 || op == WRITE_16; | |
285 | } | |
286 | ||
287 | static void pvscsi_kick_io(const struct pvscsi_adapter *adapter, | |
288 | unsigned char op) | |
289 | { | |
2a815b5a RM |
290 | if (scsi_is_rw(op)) { |
291 | struct PVSCSIRingsState *s = adapter->rings_state; | |
292 | ||
293 | if (!adapter->use_req_threshold || | |
294 | s->reqProdIdx - s->reqConsIdx >= s->reqCallThreshold) | |
295 | pvscsi_kick_rw_io(adapter); | |
296 | } else { | |
851b1642 | 297 | pvscsi_process_request_ring(adapter); |
2a815b5a | 298 | } |
851b1642 AK |
299 | } |
300 | ||
301 | static void ll_adapter_reset(const struct pvscsi_adapter *adapter) | |
302 | { | |
303 | dev_dbg(pvscsi_dev(adapter), "Adapter Reset on %p\n", adapter); | |
304 | ||
305 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_ADAPTER_RESET, NULL, 0); | |
306 | } | |
307 | ||
308 | static void ll_bus_reset(const struct pvscsi_adapter *adapter) | |
309 | { | |
59e13d48 | 310 | dev_dbg(pvscsi_dev(adapter), "Resetting bus on %p\n", adapter); |
851b1642 AK |
311 | |
312 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_RESET_BUS, NULL, 0); | |
313 | } | |
314 | ||
315 | static void ll_device_reset(const struct pvscsi_adapter *adapter, u32 target) | |
316 | { | |
317 | struct PVSCSICmdDescResetDevice cmd = { 0 }; | |
318 | ||
59e13d48 | 319 | dev_dbg(pvscsi_dev(adapter), "Resetting device: target=%u\n", target); |
851b1642 AK |
320 | |
321 | cmd.target = target; | |
322 | ||
323 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_RESET_DEVICE, | |
324 | &cmd, sizeof(cmd)); | |
325 | } | |
326 | ||
327 | static void pvscsi_create_sg(struct pvscsi_ctx *ctx, | |
328 | struct scatterlist *sg, unsigned count) | |
329 | { | |
330 | unsigned i; | |
331 | struct PVSCSISGElement *sge; | |
332 | ||
333 | BUG_ON(count > PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT); | |
334 | ||
335 | sge = &ctx->sgl->sge[0]; | |
cf9648cb | 336 | for (i = 0; i < count; i++, sg = sg_next(sg)) { |
851b1642 AK |
337 | sge[i].addr = sg_dma_address(sg); |
338 | sge[i].length = sg_dma_len(sg); | |
339 | sge[i].flags = 0; | |
340 | } | |
341 | } | |
342 | ||
343 | /* | |
344 | * Map all data buffers for a command into PCI space and | |
345 | * setup the scatter/gather list if needed. | |
346 | */ | |
c965853a JB |
347 | static int pvscsi_map_buffers(struct pvscsi_adapter *adapter, |
348 | struct pvscsi_ctx *ctx, struct scsi_cmnd *cmd, | |
349 | struct PVSCSIRingReqDesc *e) | |
851b1642 AK |
350 | { |
351 | unsigned count; | |
352 | unsigned bufflen = scsi_bufflen(cmd); | |
353 | struct scatterlist *sg; | |
354 | ||
355 | e->dataLen = bufflen; | |
356 | e->dataAddr = 0; | |
357 | if (bufflen == 0) | |
c965853a | 358 | return 0; |
851b1642 AK |
359 | |
360 | sg = scsi_sglist(cmd); | |
361 | count = scsi_sg_count(cmd); | |
362 | if (count != 0) { | |
363 | int segs = scsi_dma_map(cmd); | |
c965853a JB |
364 | |
365 | if (segs == -ENOMEM) { | |
d8dd7d76 | 366 | scmd_printk(KERN_DEBUG, cmd, |
c965853a JB |
367 | "vmw_pvscsi: Failed to map cmd sglist for DMA.\n"); |
368 | return -ENOMEM; | |
369 | } else if (segs > 1) { | |
851b1642 AK |
370 | pvscsi_create_sg(ctx, sg, segs); |
371 | ||
372 | e->flags |= PVSCSI_FLAG_CMD_WITH_SG_LIST; | |
9b7ca6c2 CH |
373 | ctx->sglPA = dma_map_single(&adapter->dev->dev, |
374 | ctx->sgl, SGL_SIZE, DMA_TO_DEVICE); | |
375 | if (dma_mapping_error(&adapter->dev->dev, ctx->sglPA)) { | |
c965853a JB |
376 | scmd_printk(KERN_ERR, cmd, |
377 | "vmw_pvscsi: Failed to map ctx sglist for DMA.\n"); | |
378 | scsi_dma_unmap(cmd); | |
379 | ctx->sglPA = 0; | |
380 | return -ENOMEM; | |
381 | } | |
851b1642 AK |
382 | e->dataAddr = ctx->sglPA; |
383 | } else | |
384 | e->dataAddr = sg_dma_address(sg); | |
385 | } else { | |
386 | /* | |
387 | * In case there is no S/G list, scsi_sglist points | |
388 | * directly to the buffer. | |
389 | */ | |
9b7ca6c2 | 390 | ctx->dataPA = dma_map_single(&adapter->dev->dev, sg, bufflen, |
851b1642 | 391 | cmd->sc_data_direction); |
9b7ca6c2 | 392 | if (dma_mapping_error(&adapter->dev->dev, ctx->dataPA)) { |
d8dd7d76 | 393 | scmd_printk(KERN_DEBUG, cmd, |
c965853a JB |
394 | "vmw_pvscsi: Failed to map direct data buffer for DMA.\n"); |
395 | return -ENOMEM; | |
396 | } | |
851b1642 AK |
397 | e->dataAddr = ctx->dataPA; |
398 | } | |
c965853a JB |
399 | |
400 | return 0; | |
851b1642 AK |
401 | } |
402 | ||
f4652752 TH |
403 | /* |
404 | * The device incorrectly doesn't clear the first byte of the sense | |
405 | * buffer in some cases. We have to do it ourselves. | |
406 | * Otherwise we run into trouble when SWIOTLB is forced. | |
407 | */ | |
408 | static void pvscsi_patch_sense(struct scsi_cmnd *cmd) | |
409 | { | |
410 | if (cmd->sense_buffer) | |
411 | cmd->sense_buffer[0] = 0; | |
412 | } | |
413 | ||
851b1642 AK |
414 | static void pvscsi_unmap_buffers(const struct pvscsi_adapter *adapter, |
415 | struct pvscsi_ctx *ctx) | |
416 | { | |
417 | struct scsi_cmnd *cmd; | |
418 | unsigned bufflen; | |
419 | ||
420 | cmd = ctx->cmd; | |
421 | bufflen = scsi_bufflen(cmd); | |
422 | ||
423 | if (bufflen != 0) { | |
424 | unsigned count = scsi_sg_count(cmd); | |
425 | ||
426 | if (count != 0) { | |
427 | scsi_dma_unmap(cmd); | |
428 | if (ctx->sglPA) { | |
9b7ca6c2 CH |
429 | dma_unmap_single(&adapter->dev->dev, ctx->sglPA, |
430 | SGL_SIZE, DMA_TO_DEVICE); | |
851b1642 AK |
431 | ctx->sglPA = 0; |
432 | } | |
433 | } else | |
9b7ca6c2 CH |
434 | dma_unmap_single(&adapter->dev->dev, ctx->dataPA, |
435 | bufflen, cmd->sc_data_direction); | |
851b1642 AK |
436 | } |
437 | if (cmd->sense_buffer) | |
9b7ca6c2 CH |
438 | dma_unmap_single(&adapter->dev->dev, ctx->sensePA, |
439 | SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); | |
851b1642 AK |
440 | } |
441 | ||
6f039790 | 442 | static int pvscsi_allocate_rings(struct pvscsi_adapter *adapter) |
851b1642 | 443 | { |
9b7ca6c2 CH |
444 | adapter->rings_state = dma_alloc_coherent(&adapter->dev->dev, PAGE_SIZE, |
445 | &adapter->ringStatePA, GFP_KERNEL); | |
851b1642 AK |
446 | if (!adapter->rings_state) |
447 | return -ENOMEM; | |
448 | ||
449 | adapter->req_pages = min(PVSCSI_MAX_NUM_PAGES_REQ_RING, | |
450 | pvscsi_ring_pages); | |
451 | adapter->req_depth = adapter->req_pages | |
452 | * PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE; | |
9b7ca6c2 CH |
453 | adapter->req_ring = dma_alloc_coherent(&adapter->dev->dev, |
454 | adapter->req_pages * PAGE_SIZE, &adapter->reqRingPA, | |
455 | GFP_KERNEL); | |
851b1642 AK |
456 | if (!adapter->req_ring) |
457 | return -ENOMEM; | |
458 | ||
459 | adapter->cmp_pages = min(PVSCSI_MAX_NUM_PAGES_CMP_RING, | |
460 | pvscsi_ring_pages); | |
9b7ca6c2 CH |
461 | adapter->cmp_ring = dma_alloc_coherent(&adapter->dev->dev, |
462 | adapter->cmp_pages * PAGE_SIZE, &adapter->cmpRingPA, | |
463 | GFP_KERNEL); | |
851b1642 AK |
464 | if (!adapter->cmp_ring) |
465 | return -ENOMEM; | |
466 | ||
467 | BUG_ON(!IS_ALIGNED(adapter->ringStatePA, PAGE_SIZE)); | |
468 | BUG_ON(!IS_ALIGNED(adapter->reqRingPA, PAGE_SIZE)); | |
469 | BUG_ON(!IS_ALIGNED(adapter->cmpRingPA, PAGE_SIZE)); | |
470 | ||
471 | if (!adapter->use_msg) | |
472 | return 0; | |
473 | ||
474 | adapter->msg_pages = min(PVSCSI_MAX_NUM_PAGES_MSG_RING, | |
475 | pvscsi_msg_ring_pages); | |
9b7ca6c2 CH |
476 | adapter->msg_ring = dma_alloc_coherent(&adapter->dev->dev, |
477 | adapter->msg_pages * PAGE_SIZE, &adapter->msgRingPA, | |
478 | GFP_KERNEL); | |
851b1642 AK |
479 | if (!adapter->msg_ring) |
480 | return -ENOMEM; | |
481 | BUG_ON(!IS_ALIGNED(adapter->msgRingPA, PAGE_SIZE)); | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | static void pvscsi_setup_all_rings(const struct pvscsi_adapter *adapter) | |
487 | { | |
488 | struct PVSCSICmdDescSetupRings cmd = { 0 }; | |
489 | dma_addr_t base; | |
490 | unsigned i; | |
491 | ||
492 | cmd.ringsStatePPN = adapter->ringStatePA >> PAGE_SHIFT; | |
493 | cmd.reqRingNumPages = adapter->req_pages; | |
494 | cmd.cmpRingNumPages = adapter->cmp_pages; | |
495 | ||
496 | base = adapter->reqRingPA; | |
497 | for (i = 0; i < adapter->req_pages; i++) { | |
498 | cmd.reqRingPPNs[i] = base >> PAGE_SHIFT; | |
499 | base += PAGE_SIZE; | |
500 | } | |
501 | ||
502 | base = adapter->cmpRingPA; | |
503 | for (i = 0; i < adapter->cmp_pages; i++) { | |
504 | cmd.cmpRingPPNs[i] = base >> PAGE_SHIFT; | |
505 | base += PAGE_SIZE; | |
506 | } | |
507 | ||
508 | memset(adapter->rings_state, 0, PAGE_SIZE); | |
509 | memset(adapter->req_ring, 0, adapter->req_pages * PAGE_SIZE); | |
510 | memset(adapter->cmp_ring, 0, adapter->cmp_pages * PAGE_SIZE); | |
511 | ||
512 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_SETUP_RINGS, | |
513 | &cmd, sizeof(cmd)); | |
514 | ||
515 | if (adapter->use_msg) { | |
516 | struct PVSCSICmdDescSetupMsgRing cmd_msg = { 0 }; | |
517 | ||
518 | cmd_msg.numPages = adapter->msg_pages; | |
519 | ||
520 | base = adapter->msgRingPA; | |
521 | for (i = 0; i < adapter->msg_pages; i++) { | |
522 | cmd_msg.ringPPNs[i] = base >> PAGE_SHIFT; | |
523 | base += PAGE_SIZE; | |
524 | } | |
525 | memset(adapter->msg_ring, 0, adapter->msg_pages * PAGE_SIZE); | |
526 | ||
527 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_SETUP_MSG_RING, | |
528 | &cmd_msg, sizeof(cmd_msg)); | |
529 | } | |
530 | } | |
531 | ||
db5ed4df | 532 | static int pvscsi_change_queue_depth(struct scsi_device *sdev, int qdepth) |
02845560 | 533 | { |
02845560 | 534 | if (!sdev->tagged_supported) |
1e6f2416 | 535 | qdepth = 1; |
39f79500 | 536 | return scsi_change_queue_depth(sdev, qdepth); |
02845560 AK |
537 | } |
538 | ||
851b1642 AK |
539 | /* |
540 | * Pull a completion descriptor off and pass the completion back | |
541 | * to the SCSI mid layer. | |
542 | */ | |
543 | static void pvscsi_complete_request(struct pvscsi_adapter *adapter, | |
544 | const struct PVSCSIRingCmpDesc *e) | |
545 | { | |
546 | struct pvscsi_ctx *ctx; | |
547 | struct scsi_cmnd *cmd; | |
a2713cce | 548 | struct completion *abort_cmp; |
851b1642 AK |
549 | u32 btstat = e->hostStatus; |
550 | u32 sdstat = e->scsiStatus; | |
551 | ||
552 | ctx = pvscsi_get_context(adapter, e->context); | |
553 | cmd = ctx->cmd; | |
a2713cce | 554 | abort_cmp = ctx->abort_cmp; |
851b1642 | 555 | pvscsi_unmap_buffers(adapter, ctx); |
f4652752 TH |
556 | if (sdstat != SAM_STAT_CHECK_CONDITION) |
557 | pvscsi_patch_sense(cmd); | |
851b1642 | 558 | pvscsi_release_context(adapter, ctx); |
a2713cce AK |
559 | if (abort_cmp) { |
560 | /* | |
561 | * The command was requested to be aborted. Just signal that | |
562 | * the request completed and swallow the actual cmd completion | |
563 | * here. The abort handler will post a completion for this | |
564 | * command indicating that it got successfully aborted. | |
565 | */ | |
566 | complete(abort_cmp); | |
567 | return; | |
568 | } | |
851b1642 | 569 | |
a2713cce | 570 | cmd->result = 0; |
851b1642 AK |
571 | if (sdstat != SAM_STAT_GOOD && |
572 | (btstat == BTSTAT_SUCCESS || | |
573 | btstat == BTSTAT_LINKED_COMMAND_COMPLETED || | |
574 | btstat == BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG)) { | |
e95153b6 JG |
575 | if (sdstat == SAM_STAT_COMMAND_TERMINATED) { |
576 | cmd->result = (DID_RESET << 16); | |
577 | } else { | |
578 | cmd->result = (DID_OK << 16) | sdstat; | |
e95153b6 | 579 | } |
851b1642 AK |
580 | } else |
581 | switch (btstat) { | |
582 | case BTSTAT_SUCCESS: | |
583 | case BTSTAT_LINKED_COMMAND_COMPLETED: | |
584 | case BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG: | |
e662502b MW |
585 | /* |
586 | * Commands like INQUIRY may transfer less data than | |
587 | * requested by the initiator via bufflen. Set residual | |
588 | * count to make upper layer aware of the actual amount | |
142c779d AM |
589 | * of data returned. There are cases when controller |
590 | * returns zero dataLen with non zero data - do not set | |
591 | * residual count in that case. | |
e662502b | 592 | */ |
142c779d AM |
593 | if (e->dataLen && (e->dataLen < scsi_bufflen(cmd))) |
594 | scsi_set_resid(cmd, scsi_bufflen(cmd) - e->dataLen); | |
851b1642 AK |
595 | cmd->result = (DID_OK << 16); |
596 | break; | |
597 | ||
598 | case BTSTAT_DATARUN: | |
599 | case BTSTAT_DATA_UNDERRUN: | |
600 | /* Report residual data in underruns */ | |
601 | scsi_set_resid(cmd, scsi_bufflen(cmd) - e->dataLen); | |
602 | cmd->result = (DID_ERROR << 16); | |
603 | break; | |
604 | ||
605 | case BTSTAT_SELTIMEO: | |
606 | /* Our emulation returns this for non-connected devs */ | |
607 | cmd->result = (DID_BAD_TARGET << 16); | |
608 | break; | |
609 | ||
610 | case BTSTAT_LUNMISMATCH: | |
611 | case BTSTAT_TAGREJECT: | |
612 | case BTSTAT_BADMSG: | |
851b1642 AK |
613 | case BTSTAT_HAHARDWARE: |
614 | case BTSTAT_INVPHASE: | |
615 | case BTSTAT_HATIMEOUT: | |
616 | case BTSTAT_NORESPONSE: | |
617 | case BTSTAT_DISCONNECT: | |
618 | case BTSTAT_HASOFTWARE: | |
619 | case BTSTAT_BUSFREE: | |
620 | case BTSTAT_SENSFAILED: | |
621 | cmd->result |= (DID_ERROR << 16); | |
622 | break; | |
623 | ||
624 | case BTSTAT_SENTRST: | |
625 | case BTSTAT_RECVRST: | |
626 | case BTSTAT_BUSRESET: | |
627 | cmd->result = (DID_RESET << 16); | |
628 | break; | |
629 | ||
630 | case BTSTAT_ABORTQUEUE: | |
f4b02427 | 631 | cmd->result = (DID_BUS_BUSY << 16); |
851b1642 AK |
632 | break; |
633 | ||
634 | case BTSTAT_SCSIPARITY: | |
635 | cmd->result = (DID_PARITY << 16); | |
636 | break; | |
637 | ||
638 | default: | |
639 | cmd->result = (DID_ERROR << 16); | |
640 | scmd_printk(KERN_DEBUG, cmd, | |
641 | "Unknown completion status: 0x%x\n", | |
642 | btstat); | |
643 | } | |
644 | ||
645 | dev_dbg(&cmd->device->sdev_gendev, | |
646 | "cmd=%p %x ctx=%p result=0x%x status=0x%x,%x\n", | |
647 | cmd, cmd->cmnd[0], ctx, cmd->result, btstat, sdstat); | |
648 | ||
aeb2627d | 649 | scsi_done(cmd); |
851b1642 AK |
650 | } |
651 | ||
652 | /* | |
653 | * barrier usage : Since the PVSCSI device is emulated, there could be cases | |
654 | * where we may want to serialize some accesses between the driver and the | |
655 | * emulation layer. We use compiler barriers instead of the more expensive | |
656 | * memory barriers because PVSCSI is only supported on X86 which has strong | |
657 | * memory access ordering. | |
658 | */ | |
659 | static void pvscsi_process_completion_ring(struct pvscsi_adapter *adapter) | |
660 | { | |
661 | struct PVSCSIRingsState *s = adapter->rings_state; | |
662 | struct PVSCSIRingCmpDesc *ring = adapter->cmp_ring; | |
663 | u32 cmp_entries = s->cmpNumEntriesLog2; | |
664 | ||
665 | while (s->cmpConsIdx != s->cmpProdIdx) { | |
666 | struct PVSCSIRingCmpDesc *e = ring + (s->cmpConsIdx & | |
667 | MASK(cmp_entries)); | |
668 | /* | |
669 | * This barrier() ensures that *e is not dereferenced while | |
670 | * the device emulation still writes data into the slot. | |
671 | * Since the device emulation advances s->cmpProdIdx only after | |
672 | * updating the slot we want to check it first. | |
673 | */ | |
674 | barrier(); | |
675 | pvscsi_complete_request(adapter, e); | |
676 | /* | |
677 | * This barrier() ensures that compiler doesn't reorder write | |
678 | * to s->cmpConsIdx before the read of (*e) inside | |
679 | * pvscsi_complete_request. Otherwise, device emulation may | |
680 | * overwrite *e before we had a chance to read it. | |
681 | */ | |
682 | barrier(); | |
683 | s->cmpConsIdx++; | |
684 | } | |
685 | } | |
686 | ||
687 | /* | |
688 | * Translate a Linux SCSI request into a request ring entry. | |
689 | */ | |
690 | static int pvscsi_queue_ring(struct pvscsi_adapter *adapter, | |
691 | struct pvscsi_ctx *ctx, struct scsi_cmnd *cmd) | |
692 | { | |
693 | struct PVSCSIRingsState *s; | |
694 | struct PVSCSIRingReqDesc *e; | |
695 | struct scsi_device *sdev; | |
696 | u32 req_entries; | |
697 | ||
698 | s = adapter->rings_state; | |
699 | sdev = cmd->device; | |
700 | req_entries = s->reqNumEntriesLog2; | |
701 | ||
702 | /* | |
703 | * If this condition holds, we might have room on the request ring, but | |
704 | * we might not have room on the completion ring for the response. | |
705 | * However, we have already ruled out this possibility - we would not | |
706 | * have successfully allocated a context if it were true, since we only | |
707 | * have one context per request entry. Check for it anyway, since it | |
708 | * would be a serious bug. | |
709 | */ | |
710 | if (s->reqProdIdx - s->cmpConsIdx >= 1 << req_entries) { | |
711 | scmd_printk(KERN_ERR, cmd, "vmw_pvscsi: " | |
712 | "ring full: reqProdIdx=%d cmpConsIdx=%d\n", | |
713 | s->reqProdIdx, s->cmpConsIdx); | |
714 | return -1; | |
715 | } | |
716 | ||
717 | e = adapter->req_ring + (s->reqProdIdx & MASK(req_entries)); | |
718 | ||
719 | e->bus = sdev->channel; | |
720 | e->target = sdev->id; | |
721 | memset(e->lun, 0, sizeof(e->lun)); | |
722 | e->lun[1] = sdev->lun; | |
723 | ||
724 | if (cmd->sense_buffer) { | |
9b7ca6c2 CH |
725 | ctx->sensePA = dma_map_single(&adapter->dev->dev, |
726 | cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, | |
727 | DMA_FROM_DEVICE); | |
728 | if (dma_mapping_error(&adapter->dev->dev, ctx->sensePA)) { | |
d8dd7d76 | 729 | scmd_printk(KERN_DEBUG, cmd, |
c965853a JB |
730 | "vmw_pvscsi: Failed to map sense buffer for DMA.\n"); |
731 | ctx->sensePA = 0; | |
732 | return -ENOMEM; | |
733 | } | |
851b1642 AK |
734 | e->senseAddr = ctx->sensePA; |
735 | e->senseLen = SCSI_SENSE_BUFFERSIZE; | |
736 | } else { | |
737 | e->senseLen = 0; | |
738 | e->senseAddr = 0; | |
739 | } | |
740 | e->cdbLen = cmd->cmd_len; | |
741 | e->vcpuHint = smp_processor_id(); | |
742 | memcpy(e->cdb, cmd->cmnd, e->cdbLen); | |
743 | ||
744 | e->tag = SIMPLE_QUEUE_TAG; | |
851b1642 AK |
745 | |
746 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
747 | e->flags = PVSCSI_FLAG_CMD_DIR_TOHOST; | |
748 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
749 | e->flags = PVSCSI_FLAG_CMD_DIR_TODEVICE; | |
750 | else if (cmd->sc_data_direction == DMA_NONE) | |
751 | e->flags = PVSCSI_FLAG_CMD_DIR_NONE; | |
752 | else | |
753 | e->flags = 0; | |
754 | ||
c965853a JB |
755 | if (pvscsi_map_buffers(adapter, ctx, cmd, e) != 0) { |
756 | if (cmd->sense_buffer) { | |
9b7ca6c2 | 757 | dma_unmap_single(&adapter->dev->dev, ctx->sensePA, |
c965853a | 758 | SCSI_SENSE_BUFFERSIZE, |
9b7ca6c2 | 759 | DMA_FROM_DEVICE); |
c965853a JB |
760 | ctx->sensePA = 0; |
761 | } | |
762 | return -ENOMEM; | |
763 | } | |
851b1642 AK |
764 | |
765 | e->context = pvscsi_map_context(adapter, ctx); | |
766 | ||
767 | barrier(); | |
768 | ||
769 | s->reqProdIdx++; | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
af049dfd | 774 | static int pvscsi_queue_lck(struct scsi_cmnd *cmd) |
851b1642 AK |
775 | { |
776 | struct Scsi_Host *host = cmd->device->host; | |
777 | struct pvscsi_adapter *adapter = shost_priv(host); | |
778 | struct pvscsi_ctx *ctx; | |
779 | unsigned long flags; | |
240b4cc8 | 780 | unsigned char op; |
851b1642 AK |
781 | |
782 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
783 | ||
784 | ctx = pvscsi_acquire_context(adapter, cmd); | |
785 | if (!ctx || pvscsi_queue_ring(adapter, ctx, cmd) != 0) { | |
786 | if (ctx) | |
787 | pvscsi_release_context(adapter, ctx); | |
788 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
789 | return SCSI_MLQUEUE_HOST_BUSY; | |
790 | } | |
791 | ||
240b4cc8 | 792 | op = cmd->cmnd[0]; |
851b1642 AK |
793 | |
794 | dev_dbg(&cmd->device->sdev_gendev, | |
240b4cc8 | 795 | "queued cmd %p, ctx %p, op=%x\n", cmd, ctx, op); |
851b1642 AK |
796 | |
797 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
798 | ||
240b4cc8 | 799 | pvscsi_kick_io(adapter, op); |
851b1642 AK |
800 | |
801 | return 0; | |
802 | } | |
803 | ||
f281233d JG |
804 | static DEF_SCSI_QCMD(pvscsi_queue) |
805 | ||
851b1642 AK |
806 | static int pvscsi_abort(struct scsi_cmnd *cmd) |
807 | { | |
808 | struct pvscsi_adapter *adapter = shost_priv(cmd->device->host); | |
809 | struct pvscsi_ctx *ctx; | |
810 | unsigned long flags; | |
a2713cce AK |
811 | int result = SUCCESS; |
812 | DECLARE_COMPLETION_ONSTACK(abort_cmp); | |
aac173e9 | 813 | int done; |
851b1642 AK |
814 | |
815 | scmd_printk(KERN_DEBUG, cmd, "task abort on host %u, %p\n", | |
816 | adapter->host->host_no, cmd); | |
817 | ||
818 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
819 | ||
820 | /* | |
821 | * Poll the completion ring first - we might be trying to abort | |
822 | * a command that is waiting to be dispatched in the completion ring. | |
823 | */ | |
824 | pvscsi_process_completion_ring(adapter); | |
825 | ||
826 | /* | |
827 | * If there is no context for the command, it either already succeeded | |
828 | * or else was never properly issued. Not our problem. | |
829 | */ | |
830 | ctx = pvscsi_find_context(adapter, cmd); | |
831 | if (!ctx) { | |
832 | scmd_printk(KERN_DEBUG, cmd, "Failed to abort cmd %p\n", cmd); | |
833 | goto out; | |
834 | } | |
835 | ||
a2713cce AK |
836 | /* |
837 | * Mark that the command has been requested to be aborted and issue | |
838 | * the abort. | |
839 | */ | |
840 | ctx->abort_cmp = &abort_cmp; | |
841 | ||
851b1642 | 842 | pvscsi_abort_cmd(adapter, ctx); |
a2713cce AK |
843 | spin_unlock_irqrestore(&adapter->hw_lock, flags); |
844 | /* Wait for 2 secs for the completion. */ | |
aac173e9 | 845 | done = wait_for_completion_timeout(&abort_cmp, msecs_to_jiffies(2000)); |
a2713cce | 846 | spin_lock_irqsave(&adapter->hw_lock, flags); |
851b1642 | 847 | |
aac173e9 | 848 | if (!done) { |
a2713cce AK |
849 | /* |
850 | * Failed to abort the command, unmark the fact that it | |
851 | * was requested to be aborted. | |
852 | */ | |
853 | ctx->abort_cmp = NULL; | |
854 | result = FAILED; | |
855 | scmd_printk(KERN_DEBUG, cmd, | |
856 | "Failed to get completion for aborted cmd %p\n", | |
857 | cmd); | |
858 | goto out; | |
859 | } | |
860 | ||
861 | /* | |
862 | * Successfully aborted the command. | |
863 | */ | |
864 | cmd->result = (DID_ABORT << 16); | |
aeb2627d | 865 | scsi_done(cmd); |
851b1642 AK |
866 | |
867 | out: | |
868 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
a2713cce | 869 | return result; |
851b1642 AK |
870 | } |
871 | ||
872 | /* | |
873 | * Abort all outstanding requests. This is only safe to use if the completion | |
874 | * ring will never be walked again or the device has been reset, because it | |
875 | * destroys the 1-1 mapping between context field passed to emulation and our | |
876 | * request structure. | |
877 | */ | |
878 | static void pvscsi_reset_all(struct pvscsi_adapter *adapter) | |
879 | { | |
880 | unsigned i; | |
881 | ||
882 | for (i = 0; i < adapter->req_depth; i++) { | |
883 | struct pvscsi_ctx *ctx = &adapter->cmd_map[i]; | |
884 | struct scsi_cmnd *cmd = ctx->cmd; | |
885 | if (cmd) { | |
886 | scmd_printk(KERN_ERR, cmd, | |
887 | "Forced reset on cmd %p\n", cmd); | |
888 | pvscsi_unmap_buffers(adapter, ctx); | |
f4652752 | 889 | pvscsi_patch_sense(cmd); |
851b1642 AK |
890 | pvscsi_release_context(adapter, ctx); |
891 | cmd->result = (DID_RESET << 16); | |
aeb2627d | 892 | scsi_done(cmd); |
851b1642 AK |
893 | } |
894 | } | |
895 | } | |
896 | ||
897 | static int pvscsi_host_reset(struct scsi_cmnd *cmd) | |
898 | { | |
899 | struct Scsi_Host *host = cmd->device->host; | |
900 | struct pvscsi_adapter *adapter = shost_priv(host); | |
901 | unsigned long flags; | |
902 | bool use_msg; | |
903 | ||
904 | scmd_printk(KERN_INFO, cmd, "SCSI Host reset\n"); | |
905 | ||
906 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
907 | ||
908 | use_msg = adapter->use_msg; | |
909 | ||
910 | if (use_msg) { | |
013f69a9 | 911 | adapter->use_msg = false; |
851b1642 AK |
912 | spin_unlock_irqrestore(&adapter->hw_lock, flags); |
913 | ||
914 | /* | |
915 | * Now that we know that the ISR won't add more work on the | |
916 | * workqueue we can safely flush any outstanding work. | |
917 | */ | |
918 | flush_workqueue(adapter->workqueue); | |
919 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
920 | } | |
921 | ||
922 | /* | |
923 | * We're going to tear down the entire ring structure and set it back | |
924 | * up, so stalling new requests until all completions are flushed and | |
925 | * the rings are back in place. | |
926 | */ | |
927 | ||
928 | pvscsi_process_request_ring(adapter); | |
929 | ||
930 | ll_adapter_reset(adapter); | |
931 | ||
932 | /* | |
933 | * Now process any completions. Note we do this AFTER adapter reset, | |
934 | * which is strange, but stops races where completions get posted | |
935 | * between processing the ring and issuing the reset. The backend will | |
936 | * not touch the ring memory after reset, so the immediately pre-reset | |
937 | * completion ring state is still valid. | |
938 | */ | |
939 | pvscsi_process_completion_ring(adapter); | |
940 | ||
941 | pvscsi_reset_all(adapter); | |
942 | adapter->use_msg = use_msg; | |
943 | pvscsi_setup_all_rings(adapter); | |
944 | pvscsi_unmask_intr(adapter); | |
945 | ||
946 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
947 | ||
948 | return SUCCESS; | |
949 | } | |
950 | ||
951 | static int pvscsi_bus_reset(struct scsi_cmnd *cmd) | |
952 | { | |
953 | struct Scsi_Host *host = cmd->device->host; | |
954 | struct pvscsi_adapter *adapter = shost_priv(host); | |
955 | unsigned long flags; | |
956 | ||
957 | scmd_printk(KERN_INFO, cmd, "SCSI Bus reset\n"); | |
958 | ||
959 | /* | |
960 | * We don't want to queue new requests for this bus after | |
961 | * flushing all pending requests to emulation, since new | |
962 | * requests could then sneak in during this bus reset phase, | |
963 | * so take the lock now. | |
964 | */ | |
965 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
966 | ||
967 | pvscsi_process_request_ring(adapter); | |
968 | ll_bus_reset(adapter); | |
969 | pvscsi_process_completion_ring(adapter); | |
970 | ||
971 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
972 | ||
973 | return SUCCESS; | |
974 | } | |
975 | ||
976 | static int pvscsi_device_reset(struct scsi_cmnd *cmd) | |
977 | { | |
978 | struct Scsi_Host *host = cmd->device->host; | |
979 | struct pvscsi_adapter *adapter = shost_priv(host); | |
980 | unsigned long flags; | |
981 | ||
982 | scmd_printk(KERN_INFO, cmd, "SCSI device reset on scsi%u:%u\n", | |
983 | host->host_no, cmd->device->id); | |
984 | ||
985 | /* | |
986 | * We don't want to queue new requests for this device after flushing | |
987 | * all pending requests to emulation, since new requests could then | |
988 | * sneak in during this device reset phase, so take the lock now. | |
989 | */ | |
990 | spin_lock_irqsave(&adapter->hw_lock, flags); | |
991 | ||
992 | pvscsi_process_request_ring(adapter); | |
993 | ll_device_reset(adapter, cmd->device->id); | |
994 | pvscsi_process_completion_ring(adapter); | |
995 | ||
996 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
997 | ||
998 | return SUCCESS; | |
999 | } | |
1000 | ||
1001 | static struct scsi_host_template pvscsi_template; | |
1002 | ||
1003 | static const char *pvscsi_info(struct Scsi_Host *host) | |
1004 | { | |
1005 | struct pvscsi_adapter *adapter = shost_priv(host); | |
1006 | static char buf[256]; | |
1007 | ||
1008 | sprintf(buf, "VMware PVSCSI storage adapter rev %d, req/cmp/msg rings: " | |
1009 | "%u/%u/%u pages, cmd_per_lun=%u", adapter->rev, | |
1010 | adapter->req_pages, adapter->cmp_pages, adapter->msg_pages, | |
1011 | pvscsi_template.cmd_per_lun); | |
1012 | ||
1013 | return buf; | |
1014 | } | |
1015 | ||
1016 | static struct scsi_host_template pvscsi_template = { | |
1017 | .module = THIS_MODULE, | |
1018 | .name = "VMware PVSCSI Host Adapter", | |
1019 | .proc_name = "vmw_pvscsi", | |
1020 | .info = pvscsi_info, | |
1021 | .queuecommand = pvscsi_queue, | |
1022 | .this_id = -1, | |
1023 | .sg_tablesize = PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT, | |
1024 | .dma_boundary = UINT_MAX, | |
1025 | .max_sectors = 0xffff, | |
02845560 | 1026 | .change_queue_depth = pvscsi_change_queue_depth, |
851b1642 AK |
1027 | .eh_abort_handler = pvscsi_abort, |
1028 | .eh_device_reset_handler = pvscsi_device_reset, | |
1029 | .eh_bus_reset_handler = pvscsi_bus_reset, | |
1030 | .eh_host_reset_handler = pvscsi_host_reset, | |
1031 | }; | |
1032 | ||
1033 | static void pvscsi_process_msg(const struct pvscsi_adapter *adapter, | |
1034 | const struct PVSCSIRingMsgDesc *e) | |
1035 | { | |
1036 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1037 | struct Scsi_Host *host = adapter->host; | |
1038 | struct scsi_device *sdev; | |
1039 | ||
1040 | printk(KERN_INFO "vmw_pvscsi: msg type: 0x%x - MSG RING: %u/%u (%u) \n", | |
1041 | e->type, s->msgProdIdx, s->msgConsIdx, s->msgNumEntriesLog2); | |
1042 | ||
1043 | BUILD_BUG_ON(PVSCSI_MSG_LAST != 2); | |
1044 | ||
1045 | if (e->type == PVSCSI_MSG_DEV_ADDED) { | |
1046 | struct PVSCSIMsgDescDevStatusChanged *desc; | |
1047 | desc = (struct PVSCSIMsgDescDevStatusChanged *)e; | |
1048 | ||
1049 | printk(KERN_INFO | |
1050 | "vmw_pvscsi: msg: device added at scsi%u:%u:%u\n", | |
1051 | desc->bus, desc->target, desc->lun[1]); | |
1052 | ||
1053 | if (!scsi_host_get(host)) | |
1054 | return; | |
1055 | ||
1056 | sdev = scsi_device_lookup(host, desc->bus, desc->target, | |
1057 | desc->lun[1]); | |
1058 | if (sdev) { | |
1059 | printk(KERN_INFO "vmw_pvscsi: device already exists\n"); | |
1060 | scsi_device_put(sdev); | |
1061 | } else | |
1062 | scsi_add_device(adapter->host, desc->bus, | |
1063 | desc->target, desc->lun[1]); | |
1064 | ||
1065 | scsi_host_put(host); | |
1066 | } else if (e->type == PVSCSI_MSG_DEV_REMOVED) { | |
1067 | struct PVSCSIMsgDescDevStatusChanged *desc; | |
1068 | desc = (struct PVSCSIMsgDescDevStatusChanged *)e; | |
1069 | ||
1070 | printk(KERN_INFO | |
1071 | "vmw_pvscsi: msg: device removed at scsi%u:%u:%u\n", | |
1072 | desc->bus, desc->target, desc->lun[1]); | |
1073 | ||
1074 | if (!scsi_host_get(host)) | |
1075 | return; | |
1076 | ||
1077 | sdev = scsi_device_lookup(host, desc->bus, desc->target, | |
1078 | desc->lun[1]); | |
1079 | if (sdev) { | |
1080 | scsi_remove_device(sdev); | |
1081 | scsi_device_put(sdev); | |
1082 | } else | |
1083 | printk(KERN_INFO | |
1084 | "vmw_pvscsi: failed to lookup scsi%u:%u:%u\n", | |
1085 | desc->bus, desc->target, desc->lun[1]); | |
1086 | ||
1087 | scsi_host_put(host); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | static int pvscsi_msg_pending(const struct pvscsi_adapter *adapter) | |
1092 | { | |
1093 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1094 | ||
1095 | return s->msgProdIdx != s->msgConsIdx; | |
1096 | } | |
1097 | ||
1098 | static void pvscsi_process_msg_ring(const struct pvscsi_adapter *adapter) | |
1099 | { | |
1100 | struct PVSCSIRingsState *s = adapter->rings_state; | |
1101 | struct PVSCSIRingMsgDesc *ring = adapter->msg_ring; | |
1102 | u32 msg_entries = s->msgNumEntriesLog2; | |
1103 | ||
1104 | while (pvscsi_msg_pending(adapter)) { | |
1105 | struct PVSCSIRingMsgDesc *e = ring + (s->msgConsIdx & | |
1106 | MASK(msg_entries)); | |
1107 | ||
1108 | barrier(); | |
1109 | pvscsi_process_msg(adapter, e); | |
1110 | barrier(); | |
1111 | s->msgConsIdx++; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | static void pvscsi_msg_workqueue_handler(struct work_struct *data) | |
1116 | { | |
1117 | struct pvscsi_adapter *adapter; | |
1118 | ||
1119 | adapter = container_of(data, struct pvscsi_adapter, work); | |
1120 | ||
1121 | pvscsi_process_msg_ring(adapter); | |
1122 | } | |
1123 | ||
1124 | static int pvscsi_setup_msg_workqueue(struct pvscsi_adapter *adapter) | |
1125 | { | |
1126 | char name[32]; | |
1127 | ||
1128 | if (!pvscsi_use_msg) | |
1129 | return 0; | |
1130 | ||
1131 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, | |
1132 | PVSCSI_CMD_SETUP_MSG_RING); | |
1133 | ||
1134 | if (pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS) == -1) | |
1135 | return 0; | |
1136 | ||
1137 | snprintf(name, sizeof(name), | |
1138 | "vmw_pvscsi_wq_%u", adapter->host->host_no); | |
1139 | ||
1140 | adapter->workqueue = create_singlethread_workqueue(name); | |
1141 | if (!adapter->workqueue) { | |
1142 | printk(KERN_ERR "vmw_pvscsi: failed to create work queue\n"); | |
1143 | return 0; | |
1144 | } | |
1145 | INIT_WORK(&adapter->work, pvscsi_msg_workqueue_handler); | |
1146 | ||
1147 | return 1; | |
1148 | } | |
1149 | ||
2a815b5a RM |
1150 | static bool pvscsi_setup_req_threshold(struct pvscsi_adapter *adapter, |
1151 | bool enable) | |
1152 | { | |
1153 | u32 val; | |
1154 | ||
1155 | if (!pvscsi_use_req_threshold) | |
1156 | return false; | |
1157 | ||
1158 | pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND, | |
1159 | PVSCSI_CMD_SETUP_REQCALLTHRESHOLD); | |
1160 | val = pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS); | |
1161 | if (val == -1) { | |
1162 | printk(KERN_INFO "vmw_pvscsi: device does not support req_threshold\n"); | |
1163 | return false; | |
1164 | } else { | |
1165 | struct PVSCSICmdDescSetupReqCall cmd_msg = { 0 }; | |
1166 | cmd_msg.enable = enable; | |
1167 | printk(KERN_INFO | |
1168 | "vmw_pvscsi: %sabling reqCallThreshold\n", | |
1169 | enable ? "en" : "dis"); | |
1170 | pvscsi_write_cmd_desc(adapter, | |
1171 | PVSCSI_CMD_SETUP_REQCALLTHRESHOLD, | |
1172 | &cmd_msg, sizeof(cmd_msg)); | |
1173 | return pvscsi_reg_read(adapter, | |
1174 | PVSCSI_REG_OFFSET_COMMAND_STATUS) != 0; | |
1175 | } | |
1176 | } | |
1177 | ||
851b1642 AK |
1178 | static irqreturn_t pvscsi_isr(int irq, void *devp) |
1179 | { | |
1180 | struct pvscsi_adapter *adapter = devp; | |
2e48e349 | 1181 | unsigned long flags; |
851b1642 | 1182 | |
2e48e349 CH |
1183 | spin_lock_irqsave(&adapter->hw_lock, flags); |
1184 | pvscsi_process_completion_ring(adapter); | |
1185 | if (adapter->use_msg && pvscsi_msg_pending(adapter)) | |
1186 | queue_work(adapter->workqueue, &adapter->work); | |
1187 | spin_unlock_irqrestore(&adapter->hw_lock, flags); | |
851b1642 | 1188 | |
2e48e349 CH |
1189 | return IRQ_HANDLED; |
1190 | } | |
851b1642 | 1191 | |
2e48e349 CH |
1192 | static irqreturn_t pvscsi_shared_isr(int irq, void *devp) |
1193 | { | |
1194 | struct pvscsi_adapter *adapter = devp; | |
1195 | u32 val = pvscsi_read_intr_status(adapter); | |
851b1642 | 1196 | |
2e48e349 CH |
1197 | if (!(val & PVSCSI_INTR_ALL_SUPPORTED)) |
1198 | return IRQ_NONE; | |
1199 | pvscsi_write_intr_status(devp, val); | |
1200 | return pvscsi_isr(irq, devp); | |
851b1642 AK |
1201 | } |
1202 | ||
1203 | static void pvscsi_free_sgls(const struct pvscsi_adapter *adapter) | |
1204 | { | |
1205 | struct pvscsi_ctx *ctx = adapter->cmd_map; | |
1206 | unsigned i; | |
1207 | ||
1208 | for (i = 0; i < adapter->req_depth; ++i, ++ctx) | |
1209 | free_pages((unsigned long)ctx->sgl, get_order(SGL_SIZE)); | |
1210 | } | |
1211 | ||
851b1642 AK |
1212 | static void pvscsi_shutdown_intr(struct pvscsi_adapter *adapter) |
1213 | { | |
2e48e349 CH |
1214 | free_irq(pci_irq_vector(adapter->dev, 0), adapter); |
1215 | pci_free_irq_vectors(adapter->dev); | |
851b1642 AK |
1216 | } |
1217 | ||
1218 | static void pvscsi_release_resources(struct pvscsi_adapter *adapter) | |
1219 | { | |
851b1642 AK |
1220 | if (adapter->workqueue) |
1221 | destroy_workqueue(adapter->workqueue); | |
1222 | ||
1223 | if (adapter->mmioBase) | |
1224 | pci_iounmap(adapter->dev, adapter->mmioBase); | |
1225 | ||
1226 | pci_release_regions(adapter->dev); | |
1227 | ||
1228 | if (adapter->cmd_map) { | |
1229 | pvscsi_free_sgls(adapter); | |
1230 | kfree(adapter->cmd_map); | |
1231 | } | |
1232 | ||
1233 | if (adapter->rings_state) | |
9b7ca6c2 | 1234 | dma_free_coherent(&adapter->dev->dev, PAGE_SIZE, |
851b1642 AK |
1235 | adapter->rings_state, adapter->ringStatePA); |
1236 | ||
1237 | if (adapter->req_ring) | |
9b7ca6c2 | 1238 | dma_free_coherent(&adapter->dev->dev, |
851b1642 AK |
1239 | adapter->req_pages * PAGE_SIZE, |
1240 | adapter->req_ring, adapter->reqRingPA); | |
1241 | ||
1242 | if (adapter->cmp_ring) | |
9b7ca6c2 | 1243 | dma_free_coherent(&adapter->dev->dev, |
851b1642 AK |
1244 | adapter->cmp_pages * PAGE_SIZE, |
1245 | adapter->cmp_ring, adapter->cmpRingPA); | |
1246 | ||
1247 | if (adapter->msg_ring) | |
9b7ca6c2 | 1248 | dma_free_coherent(&adapter->dev->dev, |
851b1642 AK |
1249 | adapter->msg_pages * PAGE_SIZE, |
1250 | adapter->msg_ring, adapter->msgRingPA); | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * Allocate scatter gather lists. | |
1255 | * | |
1256 | * These are statically allocated. Trying to be clever was not worth it. | |
1257 | * | |
42b2aa86 | 1258 | * Dynamic allocation can fail, and we can't go deep into the memory |
851b1642 AK |
1259 | * allocator, since we're a SCSI driver, and trying too hard to allocate |
1260 | * memory might generate disk I/O. We also don't want to fail disk I/O | |
1261 | * in that case because we can't get an allocation - the I/O could be | |
1262 | * trying to swap out data to free memory. Since that is pathological, | |
1263 | * just use a statically allocated scatter list. | |
1264 | * | |
1265 | */ | |
6f039790 | 1266 | static int pvscsi_allocate_sg(struct pvscsi_adapter *adapter) |
851b1642 AK |
1267 | { |
1268 | struct pvscsi_ctx *ctx; | |
1269 | int i; | |
1270 | ||
1271 | ctx = adapter->cmd_map; | |
1272 | BUILD_BUG_ON(sizeof(struct pvscsi_sg_list) > SGL_SIZE); | |
1273 | ||
1274 | for (i = 0; i < adapter->req_depth; ++i, ++ctx) { | |
1275 | ctx->sgl = (void *)__get_free_pages(GFP_KERNEL, | |
1276 | get_order(SGL_SIZE)); | |
1277 | ctx->sglPA = 0; | |
1278 | BUG_ON(!IS_ALIGNED(((unsigned long)ctx->sgl), PAGE_SIZE)); | |
1279 | if (!ctx->sgl) { | |
1280 | for (; i >= 0; --i, --ctx) { | |
1281 | free_pages((unsigned long)ctx->sgl, | |
1282 | get_order(SGL_SIZE)); | |
1283 | ctx->sgl = NULL; | |
1284 | } | |
1285 | return -ENOMEM; | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | ||
a9310735 AK |
1292 | /* |
1293 | * Query the device, fetch the config info and return the | |
1294 | * maximum number of targets on the adapter. In case of | |
1295 | * failure due to any reason return default i.e. 16. | |
1296 | */ | |
1297 | static u32 pvscsi_get_max_targets(struct pvscsi_adapter *adapter) | |
1298 | { | |
1299 | struct PVSCSICmdDescConfigCmd cmd; | |
1300 | struct PVSCSIConfigPageHeader *header; | |
1301 | struct device *dev; | |
1302 | dma_addr_t configPagePA; | |
1303 | void *config_page; | |
1304 | u32 numPhys = 16; | |
1305 | ||
1306 | dev = pvscsi_dev(adapter); | |
9b7ca6c2 CH |
1307 | config_page = dma_alloc_coherent(&adapter->dev->dev, PAGE_SIZE, |
1308 | &configPagePA, GFP_KERNEL); | |
a9310735 AK |
1309 | if (!config_page) { |
1310 | dev_warn(dev, "vmw_pvscsi: failed to allocate memory for config page\n"); | |
1311 | goto exit; | |
1312 | } | |
1313 | BUG_ON(configPagePA & ~PAGE_MASK); | |
1314 | ||
1315 | /* Fetch config info from the device. */ | |
1316 | cmd.configPageAddress = ((u64)PVSCSI_CONFIG_CONTROLLER_ADDRESS) << 32; | |
1317 | cmd.configPageNum = PVSCSI_CONFIG_PAGE_CONTROLLER; | |
1318 | cmd.cmpAddr = configPagePA; | |
1319 | cmd._pad = 0; | |
1320 | ||
1321 | /* | |
1322 | * Mark the completion page header with error values. If the device | |
1323 | * completes the command successfully, it sets the status values to | |
1324 | * indicate success. | |
1325 | */ | |
1326 | header = config_page; | |
a9310735 AK |
1327 | header->hostStatus = BTSTAT_INVPARAM; |
1328 | header->scsiStatus = SDSTAT_CHECK; | |
1329 | ||
1330 | pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_CONFIG, &cmd, sizeof cmd); | |
1331 | ||
1332 | if (header->hostStatus == BTSTAT_SUCCESS && | |
1333 | header->scsiStatus == SDSTAT_GOOD) { | |
1334 | struct PVSCSIConfigPageController *config; | |
1335 | ||
1336 | config = config_page; | |
1337 | numPhys = config->numPhys; | |
1338 | } else | |
1339 | dev_warn(dev, "vmw_pvscsi: PVSCSI_CMD_CONFIG failed. hostStatus = 0x%x, scsiStatus = 0x%x\n", | |
1340 | header->hostStatus, header->scsiStatus); | |
9b7ca6c2 CH |
1341 | dma_free_coherent(&adapter->dev->dev, PAGE_SIZE, config_page, |
1342 | configPagePA); | |
a9310735 AK |
1343 | exit: |
1344 | return numPhys; | |
1345 | } | |
1346 | ||
6f039790 | 1347 | static int pvscsi_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
851b1642 | 1348 | { |
2e48e349 | 1349 | unsigned int irq_flag = PCI_IRQ_MSIX | PCI_IRQ_MSI | PCI_IRQ_LEGACY; |
851b1642 | 1350 | struct pvscsi_adapter *adapter; |
02845560 AK |
1351 | struct pvscsi_adapter adapter_temp; |
1352 | struct Scsi_Host *host = NULL; | |
851b1642 | 1353 | unsigned int i; |
851b1642 | 1354 | int error; |
02845560 | 1355 | u32 max_id; |
851b1642 AK |
1356 | |
1357 | error = -ENODEV; | |
1358 | ||
1359 | if (pci_enable_device(pdev)) | |
1360 | return error; | |
1361 | ||
9b7ca6c2 | 1362 | if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { |
851b1642 | 1363 | printk(KERN_INFO "vmw_pvscsi: using 64bit dma\n"); |
9b7ca6c2 | 1364 | } else if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { |
851b1642 AK |
1365 | printk(KERN_INFO "vmw_pvscsi: using 32bit dma\n"); |
1366 | } else { | |
1367 | printk(KERN_ERR "vmw_pvscsi: failed to set DMA mask\n"); | |
1368 | goto out_disable_device; | |
1369 | } | |
1370 | ||
02845560 AK |
1371 | /* |
1372 | * Let's use a temp pvscsi_adapter struct until we find the number of | |
1373 | * targets on the adapter, after that we will switch to the real | |
1374 | * allocated struct. | |
1375 | */ | |
1376 | adapter = &adapter_temp; | |
851b1642 AK |
1377 | memset(adapter, 0, sizeof(*adapter)); |
1378 | adapter->dev = pdev; | |
851b1642 AK |
1379 | adapter->rev = pdev->revision; |
1380 | ||
1381 | if (pci_request_regions(pdev, "vmw_pvscsi")) { | |
1382 | printk(KERN_ERR "vmw_pvscsi: pci memory selection failed\n"); | |
02845560 | 1383 | goto out_disable_device; |
851b1642 AK |
1384 | } |
1385 | ||
1386 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
1387 | if ((pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)) | |
1388 | continue; | |
1389 | ||
1390 | if (pci_resource_len(pdev, i) < PVSCSI_MEM_SPACE_SIZE) | |
1391 | continue; | |
1392 | ||
1393 | break; | |
1394 | } | |
1395 | ||
1396 | if (i == DEVICE_COUNT_RESOURCE) { | |
1397 | printk(KERN_ERR | |
1398 | "vmw_pvscsi: adapter has no suitable MMIO region\n"); | |
02845560 | 1399 | goto out_release_resources_and_disable; |
851b1642 AK |
1400 | } |
1401 | ||
1402 | adapter->mmioBase = pci_iomap(pdev, i, PVSCSI_MEM_SPACE_SIZE); | |
1403 | ||
1404 | if (!adapter->mmioBase) { | |
1405 | printk(KERN_ERR | |
1406 | "vmw_pvscsi: can't iomap for BAR %d memsize %lu\n", | |
1407 | i, PVSCSI_MEM_SPACE_SIZE); | |
02845560 | 1408 | goto out_release_resources_and_disable; |
851b1642 AK |
1409 | } |
1410 | ||
1411 | pci_set_master(pdev); | |
02845560 AK |
1412 | |
1413 | /* | |
1414 | * Ask the device for max number of targets before deciding the | |
1415 | * default pvscsi_ring_pages value. | |
1416 | */ | |
1417 | max_id = pvscsi_get_max_targets(adapter); | |
1418 | printk(KERN_INFO "vmw_pvscsi: max_id: %u\n", max_id); | |
1419 | ||
1420 | if (pvscsi_ring_pages == 0) | |
1421 | /* | |
1422 | * Set the right default value. Up to 16 it is 8, above it is | |
1423 | * max. | |
1424 | */ | |
1425 | pvscsi_ring_pages = (max_id > 16) ? | |
1426 | PVSCSI_SETUP_RINGS_MAX_NUM_PAGES : | |
1427 | PVSCSI_DEFAULT_NUM_PAGES_PER_RING; | |
1428 | printk(KERN_INFO | |
1429 | "vmw_pvscsi: setting ring_pages to %d\n", | |
1430 | pvscsi_ring_pages); | |
1431 | ||
1432 | pvscsi_template.can_queue = | |
1433 | min(PVSCSI_MAX_NUM_PAGES_REQ_RING, pvscsi_ring_pages) * | |
1434 | PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE; | |
1435 | pvscsi_template.cmd_per_lun = | |
1436 | min(pvscsi_template.can_queue, pvscsi_cmd_per_lun); | |
1437 | host = scsi_host_alloc(&pvscsi_template, sizeof(struct pvscsi_adapter)); | |
1438 | if (!host) { | |
1439 | printk(KERN_ERR "vmw_pvscsi: failed to allocate host\n"); | |
1440 | goto out_release_resources_and_disable; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * Let's use the real pvscsi_adapter struct here onwards. | |
1445 | */ | |
1446 | adapter = shost_priv(host); | |
1447 | memset(adapter, 0, sizeof(*adapter)); | |
1448 | adapter->dev = pdev; | |
1449 | adapter->host = host; | |
1450 | /* | |
1451 | * Copy back what we already have to the allocated adapter struct. | |
1452 | */ | |
1453 | adapter->rev = adapter_temp.rev; | |
1454 | adapter->mmioBase = adapter_temp.mmioBase; | |
1455 | ||
1456 | spin_lock_init(&adapter->hw_lock); | |
1457 | host->max_channel = 0; | |
1458 | host->max_lun = 1; | |
1459 | host->max_cmd_len = 16; | |
1460 | host->max_id = max_id; | |
1461 | ||
851b1642 AK |
1462 | pci_set_drvdata(pdev, host); |
1463 | ||
1464 | ll_adapter_reset(adapter); | |
1465 | ||
1466 | adapter->use_msg = pvscsi_setup_msg_workqueue(adapter); | |
1467 | ||
1468 | error = pvscsi_allocate_rings(adapter); | |
1469 | if (error) { | |
1470 | printk(KERN_ERR "vmw_pvscsi: unable to allocate ring memory\n"); | |
1471 | goto out_release_resources; | |
1472 | } | |
1473 | ||
1474 | /* | |
1475 | * From this point on we should reset the adapter if anything goes | |
1476 | * wrong. | |
1477 | */ | |
1478 | pvscsi_setup_all_rings(adapter); | |
1479 | ||
1480 | adapter->cmd_map = kcalloc(adapter->req_depth, | |
1481 | sizeof(struct pvscsi_ctx), GFP_KERNEL); | |
1482 | if (!adapter->cmd_map) { | |
1483 | printk(KERN_ERR "vmw_pvscsi: failed to allocate memory.\n"); | |
1484 | error = -ENOMEM; | |
1485 | goto out_reset_adapter; | |
1486 | } | |
1487 | ||
1488 | INIT_LIST_HEAD(&adapter->cmd_pool); | |
1489 | for (i = 0; i < adapter->req_depth; i++) { | |
1490 | struct pvscsi_ctx *ctx = adapter->cmd_map + i; | |
1491 | list_add(&ctx->list, &adapter->cmd_pool); | |
1492 | } | |
1493 | ||
1494 | error = pvscsi_allocate_sg(adapter); | |
1495 | if (error) { | |
1496 | printk(KERN_ERR "vmw_pvscsi: unable to allocate s/g table\n"); | |
1497 | goto out_reset_adapter; | |
1498 | } | |
1499 | ||
2e48e349 CH |
1500 | if (pvscsi_disable_msix) |
1501 | irq_flag &= ~PCI_IRQ_MSIX; | |
1502 | if (pvscsi_disable_msi) | |
1503 | irq_flag &= ~PCI_IRQ_MSI; | |
1504 | ||
1505 | error = pci_alloc_irq_vectors(adapter->dev, 1, 1, irq_flag); | |
c527de41 | 1506 | if (error < 0) |
2e48e349 | 1507 | goto out_reset_adapter; |
851b1642 | 1508 | |
2a815b5a RM |
1509 | adapter->use_req_threshold = pvscsi_setup_req_threshold(adapter, true); |
1510 | printk(KERN_DEBUG "vmw_pvscsi: driver-based request coalescing %sabled\n", | |
1511 | adapter->use_req_threshold ? "en" : "dis"); | |
1512 | ||
2e48e349 CH |
1513 | if (adapter->dev->msix_enabled || adapter->dev->msi_enabled) { |
1514 | printk(KERN_INFO "vmw_pvscsi: using MSI%s\n", | |
1515 | adapter->dev->msix_enabled ? "-X" : ""); | |
1516 | error = request_irq(pci_irq_vector(pdev, 0), pvscsi_isr, | |
1517 | 0, "vmw_pvscsi", adapter); | |
1518 | } else { | |
1519 | printk(KERN_INFO "vmw_pvscsi: using INTx\n"); | |
1520 | error = request_irq(pci_irq_vector(pdev, 0), pvscsi_shared_isr, | |
1521 | IRQF_SHARED, "vmw_pvscsi", adapter); | |
1522 | } | |
1523 | ||
851b1642 AK |
1524 | if (error) { |
1525 | printk(KERN_ERR | |
1526 | "vmw_pvscsi: unable to request IRQ: %d\n", error); | |
851b1642 AK |
1527 | goto out_reset_adapter; |
1528 | } | |
1529 | ||
1530 | error = scsi_add_host(host, &pdev->dev); | |
1531 | if (error) { | |
1532 | printk(KERN_ERR | |
1533 | "vmw_pvscsi: scsi_add_host failed: %d\n", error); | |
1534 | goto out_reset_adapter; | |
1535 | } | |
1536 | ||
1537 | dev_info(&pdev->dev, "VMware PVSCSI rev %d host #%u\n", | |
1538 | adapter->rev, host->host_no); | |
1539 | ||
1540 | pvscsi_unmask_intr(adapter); | |
1541 | ||
1542 | scsi_scan_host(host); | |
1543 | ||
1544 | return 0; | |
1545 | ||
1546 | out_reset_adapter: | |
1547 | ll_adapter_reset(adapter); | |
1548 | out_release_resources: | |
02f425f8 | 1549 | pvscsi_shutdown_intr(adapter); |
851b1642 | 1550 | pvscsi_release_resources(adapter); |
851b1642 AK |
1551 | scsi_host_put(host); |
1552 | out_disable_device: | |
851b1642 AK |
1553 | pci_disable_device(pdev); |
1554 | ||
1555 | return error; | |
02845560 AK |
1556 | |
1557 | out_release_resources_and_disable: | |
02f425f8 | 1558 | pvscsi_shutdown_intr(adapter); |
02845560 AK |
1559 | pvscsi_release_resources(adapter); |
1560 | goto out_disable_device; | |
851b1642 AK |
1561 | } |
1562 | ||
1563 | static void __pvscsi_shutdown(struct pvscsi_adapter *adapter) | |
1564 | { | |
1565 | pvscsi_mask_intr(adapter); | |
1566 | ||
1567 | if (adapter->workqueue) | |
1568 | flush_workqueue(adapter->workqueue); | |
1569 | ||
1570 | pvscsi_shutdown_intr(adapter); | |
1571 | ||
1572 | pvscsi_process_request_ring(adapter); | |
1573 | pvscsi_process_completion_ring(adapter); | |
1574 | ll_adapter_reset(adapter); | |
1575 | } | |
1576 | ||
1577 | static void pvscsi_shutdown(struct pci_dev *dev) | |
1578 | { | |
1579 | struct Scsi_Host *host = pci_get_drvdata(dev); | |
1580 | struct pvscsi_adapter *adapter = shost_priv(host); | |
1581 | ||
1582 | __pvscsi_shutdown(adapter); | |
1583 | } | |
1584 | ||
1585 | static void pvscsi_remove(struct pci_dev *pdev) | |
1586 | { | |
1587 | struct Scsi_Host *host = pci_get_drvdata(pdev); | |
1588 | struct pvscsi_adapter *adapter = shost_priv(host); | |
1589 | ||
1590 | scsi_remove_host(host); | |
1591 | ||
1592 | __pvscsi_shutdown(adapter); | |
1593 | pvscsi_release_resources(adapter); | |
1594 | ||
1595 | scsi_host_put(host); | |
1596 | ||
851b1642 AK |
1597 | pci_disable_device(pdev); |
1598 | } | |
1599 | ||
1600 | static struct pci_driver pvscsi_pci_driver = { | |
1601 | .name = "vmw_pvscsi", | |
1602 | .id_table = pvscsi_pci_tbl, | |
1603 | .probe = pvscsi_probe, | |
6f039790 | 1604 | .remove = pvscsi_remove, |
851b1642 AK |
1605 | .shutdown = pvscsi_shutdown, |
1606 | }; | |
1607 | ||
1608 | static int __init pvscsi_init(void) | |
1609 | { | |
1610 | pr_info("%s - version %s\n", | |
1611 | PVSCSI_LINUX_DRIVER_DESC, PVSCSI_DRIVER_VERSION_STRING); | |
1612 | return pci_register_driver(&pvscsi_pci_driver); | |
1613 | } | |
1614 | ||
1615 | static void __exit pvscsi_exit(void) | |
1616 | { | |
1617 | pci_unregister_driver(&pvscsi_pci_driver); | |
1618 | } | |
1619 | ||
1620 | module_init(pvscsi_init); | |
1621 | module_exit(pvscsi_exit); |