root / hw / scsi / spapr_vscsi.c @ 47b43a1f
History | View | Annotate | Download (28.4 kB)
1 |
/*
|
---|---|
2 |
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
|
3 |
*
|
4 |
* PAPR Virtual SCSI, aka ibmvscsi
|
5 |
*
|
6 |
* Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation.
|
7 |
*
|
8 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
9 |
* of this software and associated documentation files (the "Software"), to deal
|
10 |
* in the Software without restriction, including without limitation the rights
|
11 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
12 |
* copies of the Software, and to permit persons to whom the Software is
|
13 |
* furnished to do so, subject to the following conditions:
|
14 |
*
|
15 |
* The above copyright notice and this permission notice shall be included in
|
16 |
* all copies or substantial portions of the Software.
|
17 |
*
|
18 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
19 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
20 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
21 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
22 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
23 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
24 |
* THE SOFTWARE.
|
25 |
*
|
26 |
* TODO:
|
27 |
*
|
28 |
* - Cleanups :-)
|
29 |
* - Sort out better how to assign devices to VSCSI instances
|
30 |
* - Fix residual counts
|
31 |
* - Add indirect descriptors support
|
32 |
* - Maybe do autosense (PAPR seems to mandate it, linux doesn't care)
|
33 |
*/
|
34 |
#include "hw/hw.h" |
35 |
#include "hw/scsi/scsi.h" |
36 |
#include "block/scsi.h" |
37 |
#include "srp.h" |
38 |
#include "hw/qdev.h" |
39 |
#include "hw/ppc/spapr.h" |
40 |
#include "hw/ppc/spapr_vio.h" |
41 |
#include "viosrp.h" |
42 |
|
43 |
#include <libfdt.h> |
44 |
|
45 |
/*#define DEBUG_VSCSI*/
|
46 |
|
47 |
#ifdef DEBUG_VSCSI
|
48 |
#define dprintf(fmt, ...) \
|
49 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
50 |
#else
|
51 |
#define dprintf(fmt, ...) \
|
52 |
do { } while (0) |
53 |
#endif
|
54 |
|
55 |
/*
|
56 |
* Virtual SCSI device
|
57 |
*/
|
58 |
|
59 |
/* Random numbers */
|
60 |
#define VSCSI_MAX_SECTORS 4096 |
61 |
#define VSCSI_REQ_LIMIT 24 |
62 |
|
63 |
#define SCSI_SENSE_BUF_SIZE 96 |
64 |
#define SRP_RSP_SENSE_DATA_LEN 18 |
65 |
|
66 |
typedef union vscsi_crq { |
67 |
struct viosrp_crq s;
|
68 |
uint8_t raw[16];
|
69 |
} vscsi_crq; |
70 |
|
71 |
typedef struct vscsi_req { |
72 |
vscsi_crq crq; |
73 |
union viosrp_iu iu;
|
74 |
|
75 |
/* SCSI request tracking */
|
76 |
SCSIRequest *sreq; |
77 |
uint32_t qtag; /* qemu tag != srp tag */
|
78 |
int lun;
|
79 |
int active;
|
80 |
long data_len;
|
81 |
int writing;
|
82 |
int senselen;
|
83 |
uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
84 |
|
85 |
/* RDMA related bits */
|
86 |
uint8_t dma_fmt; |
87 |
struct srp_direct_buf ext_desc;
|
88 |
struct srp_direct_buf *cur_desc;
|
89 |
struct srp_indirect_buf *ind_desc;
|
90 |
int local_desc;
|
91 |
int total_desc;
|
92 |
} vscsi_req; |
93 |
|
94 |
|
95 |
typedef struct { |
96 |
VIOsPAPRDevice vdev; |
97 |
SCSIBus bus; |
98 |
vscsi_req reqs[VSCSI_REQ_LIMIT]; |
99 |
} VSCSIState; |
100 |
|
101 |
static struct vscsi_req *vscsi_get_req(VSCSIState *s) |
102 |
{ |
103 |
vscsi_req *req; |
104 |
int i;
|
105 |
|
106 |
for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
107 |
req = &s->reqs[i]; |
108 |
if (!req->active) {
|
109 |
memset(req, 0, sizeof(*req)); |
110 |
req->qtag = i; |
111 |
req->active = 1;
|
112 |
return req;
|
113 |
} |
114 |
} |
115 |
return NULL; |
116 |
} |
117 |
|
118 |
static void vscsi_put_req(vscsi_req *req) |
119 |
{ |
120 |
if (req->sreq != NULL) { |
121 |
scsi_req_unref(req->sreq); |
122 |
} |
123 |
req->sreq = NULL;
|
124 |
req->active = 0;
|
125 |
} |
126 |
|
127 |
static SCSIDevice *vscsi_device_find(SCSIBus *bus, uint64_t srp_lun, int *lun) |
128 |
{ |
129 |
int channel = 0, id = 0; |
130 |
|
131 |
retry:
|
132 |
switch (srp_lun >> 62) { |
133 |
case 0: |
134 |
if ((srp_lun >> 56) != 0) { |
135 |
channel = (srp_lun >> 56) & 0x3f; |
136 |
id = (srp_lun >> 48) & 0xff; |
137 |
srp_lun <<= 16;
|
138 |
goto retry;
|
139 |
} |
140 |
*lun = (srp_lun >> 48) & 0xff; |
141 |
break;
|
142 |
|
143 |
case 1: |
144 |
*lun = (srp_lun >> 48) & 0x3fff; |
145 |
break;
|
146 |
case 2: |
147 |
channel = (srp_lun >> 53) & 0x7; |
148 |
id = (srp_lun >> 56) & 0x3f; |
149 |
*lun = (srp_lun >> 48) & 0x1f; |
150 |
break;
|
151 |
case 3: |
152 |
*lun = -1;
|
153 |
return NULL; |
154 |
default:
|
155 |
abort(); |
156 |
} |
157 |
|
158 |
return scsi_device_find(bus, channel, id, *lun);
|
159 |
} |
160 |
|
161 |
static int vscsi_send_iu(VSCSIState *s, vscsi_req *req, |
162 |
uint64_t length, uint8_t format) |
163 |
{ |
164 |
long rc, rc1;
|
165 |
|
166 |
/* First copy the SRP */
|
167 |
rc = spapr_vio_dma_write(&s->vdev, req->crq.s.IU_data_ptr, |
168 |
&req->iu, length); |
169 |
if (rc) {
|
170 |
fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
|
171 |
} |
172 |
|
173 |
req->crq.s.valid = 0x80;
|
174 |
req->crq.s.format = format; |
175 |
req->crq.s.reserved = 0x00;
|
176 |
req->crq.s.timeout = cpu_to_be16(0x0000);
|
177 |
req->crq.s.IU_length = cpu_to_be16(length); |
178 |
req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */
|
179 |
|
180 |
if (rc == 0) { |
181 |
req->crq.s.status = 0x99; /* Just needs to be non-zero */ |
182 |
} else {
|
183 |
req->crq.s.status = 0x00;
|
184 |
} |
185 |
|
186 |
rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw); |
187 |
if (rc1) {
|
188 |
fprintf(stderr, "vscsi_send_iu: Error sending response\n");
|
189 |
return rc1;
|
190 |
} |
191 |
|
192 |
return rc;
|
193 |
} |
194 |
|
195 |
static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req, |
196 |
uint8_t key, uint8_t asc, uint8_t ascq) |
197 |
{ |
198 |
req->senselen = SRP_RSP_SENSE_DATA_LEN; |
199 |
|
200 |
/* Valid bit and 'current errors' */
|
201 |
req->sense[0] = (0x1 << 7 | 0x70); |
202 |
/* Sense key */
|
203 |
req->sense[2] = key;
|
204 |
/* Additional sense length */
|
205 |
req->sense[7] = 0xa; /* 10 bytes */ |
206 |
/* Additional sense code */
|
207 |
req->sense[12] = asc;
|
208 |
req->sense[13] = ascq;
|
209 |
} |
210 |
|
211 |
static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req, |
212 |
uint8_t status, int32_t res_in, int32_t res_out) |
213 |
{ |
214 |
union viosrp_iu *iu = &req->iu;
|
215 |
uint64_t tag = iu->srp.rsp.tag; |
216 |
int total_len = sizeof(iu->srp.rsp); |
217 |
|
218 |
dprintf("VSCSI: Sending resp status: 0x%x, "
|
219 |
"res_in: %d, res_out: %d\n", status, res_in, res_out);
|
220 |
|
221 |
memset(iu, 0, sizeof(struct srp_rsp)); |
222 |
iu->srp.rsp.opcode = SRP_RSP; |
223 |
iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
|
224 |
iu->srp.rsp.tag = tag; |
225 |
|
226 |
/* Handle residuals */
|
227 |
if (res_in < 0) { |
228 |
iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER; |
229 |
res_in = -res_in; |
230 |
} else if (res_in) { |
231 |
iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; |
232 |
} |
233 |
if (res_out < 0) { |
234 |
iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER; |
235 |
res_out = -res_out; |
236 |
} else if (res_out) { |
237 |
iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER; |
238 |
} |
239 |
iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in); |
240 |
iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out); |
241 |
|
242 |
/* We don't do response data */
|
243 |
/* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */
|
244 |
iu->srp.rsp.resp_data_len = cpu_to_be32(0);
|
245 |
|
246 |
/* Handle success vs. failure */
|
247 |
iu->srp.rsp.status = status; |
248 |
if (status) {
|
249 |
iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2; |
250 |
if (req->senselen) {
|
251 |
req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; |
252 |
req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen); |
253 |
memcpy(req->iu.srp.rsp.data, req->sense, req->senselen); |
254 |
total_len += req->senselen; |
255 |
} |
256 |
} else {
|
257 |
iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1; |
258 |
} |
259 |
|
260 |
vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); |
261 |
return 0; |
262 |
} |
263 |
|
264 |
static inline void vscsi_swap_desc(struct srp_direct_buf *desc) |
265 |
{ |
266 |
desc->va = be64_to_cpu(desc->va); |
267 |
desc->len = be32_to_cpu(desc->len); |
268 |
} |
269 |
|
270 |
static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req, |
271 |
uint8_t *buf, uint32_t len) |
272 |
{ |
273 |
struct srp_direct_buf *md = req->cur_desc;
|
274 |
uint32_t llen; |
275 |
int rc = 0; |
276 |
|
277 |
dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n",
|
278 |
len, (unsigned long long)md->va, md->len); |
279 |
|
280 |
llen = MIN(len, md->len); |
281 |
if (llen) {
|
282 |
if (req->writing) { /* writing = to device = reading from memory */ |
283 |
rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen); |
284 |
} else {
|
285 |
rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen); |
286 |
} |
287 |
} |
288 |
md->len -= llen; |
289 |
md->va += llen; |
290 |
|
291 |
if (rc) {
|
292 |
return -1; |
293 |
} |
294 |
return llen;
|
295 |
} |
296 |
|
297 |
static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, |
298 |
uint8_t *buf, uint32_t len) |
299 |
{ |
300 |
struct srp_direct_buf *td = &req->ind_desc->table_desc;
|
301 |
struct srp_direct_buf *md = req->cur_desc;
|
302 |
int rc = 0; |
303 |
uint32_t llen, total = 0;
|
304 |
|
305 |
dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n",
|
306 |
len, (unsigned long long)td->va, td->len); |
307 |
|
308 |
/* While we have data ... */
|
309 |
while (len) {
|
310 |
/* If we have a descriptor but it's empty, go fetch a new one */
|
311 |
if (md && md->len == 0) { |
312 |
/* More local available, use one */
|
313 |
if (req->local_desc) {
|
314 |
md = ++req->cur_desc; |
315 |
--req->local_desc; |
316 |
--req->total_desc; |
317 |
td->va += sizeof(struct srp_direct_buf); |
318 |
} else {
|
319 |
md = req->cur_desc = NULL;
|
320 |
} |
321 |
} |
322 |
/* No descriptor at hand, fetch one */
|
323 |
if (!md) {
|
324 |
if (!req->total_desc) {
|
325 |
dprintf("VSCSI: Out of descriptors !\n");
|
326 |
break;
|
327 |
} |
328 |
md = req->cur_desc = &req->ext_desc; |
329 |
dprintf("VSCSI: Reading desc from 0x%llx\n",
|
330 |
(unsigned long long)td->va); |
331 |
rc = spapr_vio_dma_read(&s->vdev, td->va, md, |
332 |
sizeof(struct srp_direct_buf)); |
333 |
if (rc) {
|
334 |
dprintf("VSCSI: spapr_vio_dma_read -> %d reading ext_desc\n",
|
335 |
rc); |
336 |
break;
|
337 |
} |
338 |
vscsi_swap_desc(md); |
339 |
td->va += sizeof(struct srp_direct_buf); |
340 |
--req->total_desc; |
341 |
} |
342 |
dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
|
343 |
(unsigned long long)md->va, md->len, len); |
344 |
|
345 |
/* Perform transfer */
|
346 |
llen = MIN(len, md->len); |
347 |
if (req->writing) { /* writing = to device = reading from memory */ |
348 |
rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen); |
349 |
} else {
|
350 |
rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen); |
351 |
} |
352 |
if (rc) {
|
353 |
dprintf("VSCSI: spapr_vio_dma_r/w(%d) -> %d\n", req->writing, rc);
|
354 |
break;
|
355 |
} |
356 |
dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
|
357 |
buf[0], buf[1], buf[2], buf[3]); |
358 |
|
359 |
len -= llen; |
360 |
buf += llen; |
361 |
total += llen; |
362 |
md->va += llen; |
363 |
md->len -= llen; |
364 |
} |
365 |
return rc ? -1 : total; |
366 |
} |
367 |
|
368 |
static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
369 |
int writing, uint8_t *buf, uint32_t len)
|
370 |
{ |
371 |
int err = 0; |
372 |
|
373 |
switch (req->dma_fmt) {
|
374 |
case SRP_NO_DATA_DESC:
|
375 |
dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
|
376 |
break;
|
377 |
case SRP_DATA_DESC_DIRECT:
|
378 |
err = vscsi_srp_direct_data(s, req, buf, len); |
379 |
break;
|
380 |
case SRP_DATA_DESC_INDIRECT:
|
381 |
err = vscsi_srp_indirect_data(s, req, buf, len); |
382 |
break;
|
383 |
} |
384 |
return err;
|
385 |
} |
386 |
|
387 |
/* Bits from linux srp */
|
388 |
static int data_out_desc_size(struct srp_cmd *cmd) |
389 |
{ |
390 |
int size = 0; |
391 |
uint8_t fmt = cmd->buf_fmt >> 4;
|
392 |
|
393 |
switch (fmt) {
|
394 |
case SRP_NO_DATA_DESC:
|
395 |
break;
|
396 |
case SRP_DATA_DESC_DIRECT:
|
397 |
size = sizeof(struct srp_direct_buf); |
398 |
break;
|
399 |
case SRP_DATA_DESC_INDIRECT:
|
400 |
size = sizeof(struct srp_indirect_buf) + |
401 |
sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
402 |
break;
|
403 |
default:
|
404 |
break;
|
405 |
} |
406 |
return size;
|
407 |
} |
408 |
|
409 |
static int vscsi_preprocess_desc(vscsi_req *req) |
410 |
{ |
411 |
struct srp_cmd *cmd = &req->iu.srp.cmd;
|
412 |
int offset, i;
|
413 |
|
414 |
offset = cmd->add_cdb_len & ~3;
|
415 |
|
416 |
if (req->writing) {
|
417 |
req->dma_fmt = cmd->buf_fmt >> 4;
|
418 |
} else {
|
419 |
offset += data_out_desc_size(cmd); |
420 |
req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
421 |
} |
422 |
|
423 |
switch (req->dma_fmt) {
|
424 |
case SRP_NO_DATA_DESC:
|
425 |
break;
|
426 |
case SRP_DATA_DESC_DIRECT:
|
427 |
req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
|
428 |
req->total_desc = req->local_desc = 1;
|
429 |
vscsi_swap_desc(req->cur_desc); |
430 |
dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
|
431 |
req->writing ? "write" : "read", |
432 |
req->cur_desc->len, (unsigned long long)req->cur_desc->va); |
433 |
break;
|
434 |
case SRP_DATA_DESC_INDIRECT:
|
435 |
req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
|
436 |
vscsi_swap_desc(&req->ind_desc->table_desc); |
437 |
req->total_desc = req->ind_desc->table_desc.len / |
438 |
sizeof(struct srp_direct_buf); |
439 |
req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
440 |
cmd->data_in_desc_cnt; |
441 |
for (i = 0; i < req->local_desc; i++) { |
442 |
vscsi_swap_desc(&req->ind_desc->desc_list[i]); |
443 |
} |
444 |
req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; |
445 |
dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
|
446 |
"(%d local) VA: 0x%llx\n",
|
447 |
req->writing ? "read" : "write", |
448 |
be32_to_cpu(req->ind_desc->len), |
449 |
req->total_desc, req->local_desc, |
450 |
(unsigned long long)req->ind_desc->table_desc.va); |
451 |
break;
|
452 |
default:
|
453 |
fprintf(stderr, |
454 |
"vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
|
455 |
return -1; |
456 |
} |
457 |
|
458 |
return 0; |
459 |
} |
460 |
|
461 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
462 |
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len) |
463 |
{ |
464 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
465 |
vscsi_req *req = sreq->hba_private; |
466 |
uint8_t *buf; |
467 |
int rc = 0; |
468 |
|
469 |
dprintf("VSCSI: SCSI xfer complete tag=0x%x len=0x%x, req=%p\n",
|
470 |
sreq->tag, len, req); |
471 |
if (req == NULL) { |
472 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
473 |
return;
|
474 |
} |
475 |
|
476 |
if (len) {
|
477 |
buf = scsi_req_get_buf(sreq); |
478 |
rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len); |
479 |
} |
480 |
if (rc < 0) { |
481 |
fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
|
482 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
483 |
scsi_req_abort(req->sreq, CHECK_CONDITION); |
484 |
return;
|
485 |
} |
486 |
|
487 |
/* Start next chunk */
|
488 |
req->data_len -= rc; |
489 |
scsi_req_continue(sreq); |
490 |
} |
491 |
|
492 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
493 |
static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status, size_t resid) |
494 |
{ |
495 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
496 |
vscsi_req *req = sreq->hba_private; |
497 |
int32_t res_in = 0, res_out = 0; |
498 |
|
499 |
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x status=0x%x, req=%p\n",
|
500 |
reason, sreq->tag, status, req); |
501 |
if (req == NULL) { |
502 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
503 |
return;
|
504 |
} |
505 |
|
506 |
if (status == CHECK_CONDITION) {
|
507 |
req->senselen = scsi_req_get_sense(req->sreq, req->sense, |
508 |
sizeof(req->sense));
|
509 |
dprintf("VSCSI: Sense data, %d bytes:\n", len);
|
510 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
511 |
req->sense[0], req->sense[1], req->sense[2], req->sense[3], |
512 |
req->sense[4], req->sense[5], req->sense[6], req->sense[7]); |
513 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
514 |
req->sense[8], req->sense[9], req->sense[10], req->sense[11], |
515 |
req->sense[12], req->sense[13], req->sense[14], req->sense[15]); |
516 |
} |
517 |
|
518 |
dprintf("VSCSI: Command complete err=%d\n", status);
|
519 |
if (status == 0) { |
520 |
/* We handle overflows, not underflows for normal commands,
|
521 |
* but hopefully nobody cares
|
522 |
*/
|
523 |
if (req->writing) {
|
524 |
res_out = req->data_len; |
525 |
} else {
|
526 |
res_in = req->data_len; |
527 |
} |
528 |
} |
529 |
vscsi_send_rsp(s, req, status, res_in, res_out); |
530 |
vscsi_put_req(req); |
531 |
} |
532 |
|
533 |
static void vscsi_request_cancelled(SCSIRequest *sreq) |
534 |
{ |
535 |
vscsi_req *req = sreq->hba_private; |
536 |
|
537 |
vscsi_put_req(req); |
538 |
} |
539 |
|
540 |
static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
541 |
{ |
542 |
union viosrp_iu *iu = &req->iu;
|
543 |
struct srp_login_rsp *rsp = &iu->srp.login_rsp;
|
544 |
uint64_t tag = iu->srp.rsp.tag; |
545 |
|
546 |
dprintf("VSCSI: Got login, sendin response !\n");
|
547 |
|
548 |
/* TODO handle case that requested size is wrong and
|
549 |
* buffer format is wrong
|
550 |
*/
|
551 |
memset(iu, 0, sizeof(struct srp_login_rsp)); |
552 |
rsp->opcode = SRP_LOGIN_RSP; |
553 |
/* Don't advertise quite as many request as we support to
|
554 |
* keep room for management stuff etc...
|
555 |
*/
|
556 |
rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
|
557 |
rsp->tag = tag; |
558 |
rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
559 |
rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
560 |
/* direct and indirect */
|
561 |
rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
562 |
|
563 |
vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
|
564 |
} |
565 |
|
566 |
static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
567 |
{ |
568 |
uint8_t *cdb = req->iu.srp.cmd.cdb; |
569 |
uint8_t resp_data[36];
|
570 |
int rc, len, alen;
|
571 |
|
572 |
/* We dont do EVPD. Also check that page_code is 0 */
|
573 |
if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { |
574 |
/* Send INVALID FIELD IN CDB */
|
575 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
576 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
577 |
return;
|
578 |
} |
579 |
alen = cdb[3];
|
580 |
alen = (alen << 8) | cdb[4]; |
581 |
len = MIN(alen, 36);
|
582 |
|
583 |
/* Fake up inquiry using PQ=3 */
|
584 |
memset(resp_data, 0, 36); |
585 |
resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
586 |
resp_data[2] = 0x06; /* SPS-4 */ |
587 |
resp_data[3] = 0x02; /* Resp data format */ |
588 |
resp_data[4] = 36 - 5; /* Additional length */ |
589 |
resp_data[7] = 0x10; /* Sync transfers */ |
590 |
memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
591 |
memcpy(&resp_data[8], "QEMU ", 8); |
592 |
|
593 |
req->writing = 0;
|
594 |
vscsi_preprocess_desc(req); |
595 |
rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
|
596 |
if (rc < 0) { |
597 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
598 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
599 |
} else {
|
600 |
vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
601 |
} |
602 |
} |
603 |
|
604 |
static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
605 |
{ |
606 |
union srp_iu *srp = &req->iu.srp;
|
607 |
SCSIDevice *sdev; |
608 |
int n, lun;
|
609 |
|
610 |
sdev = vscsi_device_find(&s->bus, be64_to_cpu(srp->cmd.lun), &lun); |
611 |
if (!sdev) {
|
612 |
dprintf("VSCSI: Command for lun %08" PRIx64 " with no drive\n", be64_to_cpu(srp->cmd.lun)); |
613 |
if (srp->cmd.cdb[0] == INQUIRY) { |
614 |
vscsi_inquiry_no_target(s, req); |
615 |
} else {
|
616 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
617 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
618 |
} return 1; |
619 |
} |
620 |
|
621 |
req->lun = lun; |
622 |
req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req); |
623 |
n = scsi_req_enqueue(req->sreq); |
624 |
|
625 |
dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
|
626 |
req->qtag, srp->cmd.cdb[0], id, lun, n);
|
627 |
|
628 |
if (n) {
|
629 |
/* Transfer direction must be set before preprocessing the
|
630 |
* descriptors
|
631 |
*/
|
632 |
req->writing = (n < 1);
|
633 |
|
634 |
/* Preprocess RDMA descriptors */
|
635 |
vscsi_preprocess_desc(req); |
636 |
|
637 |
/* Get transfer direction and initiate transfer */
|
638 |
if (n > 0) { |
639 |
req->data_len = n; |
640 |
} else if (n < 0) { |
641 |
req->data_len = -n; |
642 |
} |
643 |
scsi_req_continue(req->sreq); |
644 |
} |
645 |
/* Don't touch req here, it may have been recycled already */
|
646 |
|
647 |
return 0; |
648 |
} |
649 |
|
650 |
static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
651 |
{ |
652 |
union viosrp_iu *iu = &req->iu;
|
653 |
int fn;
|
654 |
|
655 |
fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
|
656 |
iu->srp.tsk_mgmt.tsk_mgmt_func); |
657 |
|
658 |
switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
|
659 |
#if 0 /* We really don't deal with these for now */
|
660 |
case SRP_TSK_ABORT_TASK:
|
661 |
fn = ABORT_TASK;
|
662 |
break;
|
663 |
case SRP_TSK_ABORT_TASK_SET:
|
664 |
fn = ABORT_TASK_SET;
|
665 |
break;
|
666 |
case SRP_TSK_CLEAR_TASK_SET:
|
667 |
fn = CLEAR_TASK_SET;
|
668 |
break;
|
669 |
case SRP_TSK_LUN_RESET:
|
670 |
fn = LOGICAL_UNIT_RESET;
|
671 |
break;
|
672 |
case SRP_TSK_CLEAR_ACA:
|
673 |
fn = CLEAR_ACA;
|
674 |
break;
|
675 |
#endif
|
676 |
default:
|
677 |
fn = 0;
|
678 |
} |
679 |
if (fn) {
|
680 |
/* XXX Send/Handle target task management */
|
681 |
; |
682 |
} else {
|
683 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); |
684 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
685 |
} |
686 |
return !fn;
|
687 |
} |
688 |
|
689 |
static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
690 |
{ |
691 |
union srp_iu *srp = &req->iu.srp;
|
692 |
int done = 1; |
693 |
uint8_t opcode = srp->rsp.opcode; |
694 |
|
695 |
switch (opcode) {
|
696 |
case SRP_LOGIN_REQ:
|
697 |
vscsi_process_login(s, req); |
698 |
break;
|
699 |
case SRP_TSK_MGMT:
|
700 |
done = vscsi_process_tsk_mgmt(s, req); |
701 |
break;
|
702 |
case SRP_CMD:
|
703 |
done = vscsi_queue_cmd(s, req); |
704 |
break;
|
705 |
case SRP_LOGIN_RSP:
|
706 |
case SRP_I_LOGOUT:
|
707 |
case SRP_T_LOGOUT:
|
708 |
case SRP_RSP:
|
709 |
case SRP_CRED_REQ:
|
710 |
case SRP_CRED_RSP:
|
711 |
case SRP_AER_REQ:
|
712 |
case SRP_AER_RSP:
|
713 |
fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
|
714 |
break;
|
715 |
default:
|
716 |
fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
|
717 |
} |
718 |
|
719 |
return done;
|
720 |
} |
721 |
|
722 |
static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
723 |
{ |
724 |
struct viosrp_adapter_info *sinfo;
|
725 |
struct mad_adapter_info_data info;
|
726 |
int rc;
|
727 |
|
728 |
sinfo = &req->iu.mad.adapter_info; |
729 |
|
730 |
#if 0 /* What for ? */
|
731 |
rc = spapr_vio_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
|
732 |
&info, be16_to_cpu(sinfo->common.length));
|
733 |
if (rc) {
|
734 |
fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
|
735 |
}
|
736 |
#endif
|
737 |
memset(&info, 0, sizeof(info)); |
738 |
strcpy(info.srp_version, SRP_VERSION); |
739 |
memcpy(info.partition_name, "qemu", sizeof("qemu")); |
740 |
info.partition_number = cpu_to_be32(0);
|
741 |
info.mad_version = cpu_to_be32(1);
|
742 |
info.os_type = cpu_to_be32(2);
|
743 |
info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
744 |
|
745 |
rc = spapr_vio_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
746 |
&info, be16_to_cpu(sinfo->common.length)); |
747 |
if (rc) {
|
748 |
fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
|
749 |
} |
750 |
|
751 |
sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
752 |
|
753 |
return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
754 |
} |
755 |
|
756 |
static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
757 |
{ |
758 |
union mad_iu *mad = &req->iu.mad;
|
759 |
|
760 |
switch (be32_to_cpu(mad->empty_iu.common.type)) {
|
761 |
case VIOSRP_EMPTY_IU_TYPE:
|
762 |
fprintf(stderr, "Unsupported EMPTY MAD IU\n");
|
763 |
break;
|
764 |
case VIOSRP_ERROR_LOG_TYPE:
|
765 |
fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
|
766 |
mad->error_log.common.status = cpu_to_be16(1);
|
767 |
vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
|
768 |
break;
|
769 |
case VIOSRP_ADAPTER_INFO_TYPE:
|
770 |
vscsi_send_adapter_info(s, req); |
771 |
break;
|
772 |
case VIOSRP_HOST_CONFIG_TYPE:
|
773 |
mad->host_config.common.status = cpu_to_be16(1);
|
774 |
vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
|
775 |
break;
|
776 |
default:
|
777 |
fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
|
778 |
be32_to_cpu(mad->empty_iu.common.type)); |
779 |
} |
780 |
|
781 |
return 1; |
782 |
} |
783 |
|
784 |
static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
785 |
{ |
786 |
vscsi_req *req; |
787 |
int done;
|
788 |
|
789 |
req = vscsi_get_req(s); |
790 |
if (req == NULL) { |
791 |
fprintf(stderr, "VSCSI: Failed to get a request !\n");
|
792 |
return;
|
793 |
} |
794 |
|
795 |
/* We only support a limited number of descriptors, we know
|
796 |
* the ibmvscsi driver uses up to 10 max, so it should fit
|
797 |
* in our 256 bytes IUs. If not we'll have to increase the size
|
798 |
* of the structure.
|
799 |
*/
|
800 |
if (crq->s.IU_length > sizeof(union viosrp_iu)) { |
801 |
fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
|
802 |
crq->s.IU_length); |
803 |
vscsi_put_req(req); |
804 |
return;
|
805 |
} |
806 |
|
807 |
/* XXX Handle failure differently ? */
|
808 |
if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
|
809 |
crq->s.IU_length)) { |
810 |
fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
|
811 |
vscsi_put_req(req); |
812 |
return;
|
813 |
} |
814 |
memcpy(&req->crq, crq, sizeof(vscsi_crq));
|
815 |
|
816 |
if (crq->s.format == VIOSRP_MAD_FORMAT) {
|
817 |
done = vscsi_handle_mad_req(s, req); |
818 |
} else {
|
819 |
done = vscsi_handle_srp_req(s, req); |
820 |
} |
821 |
|
822 |
if (done) {
|
823 |
vscsi_put_req(req); |
824 |
} |
825 |
} |
826 |
|
827 |
|
828 |
static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) |
829 |
{ |
830 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
831 |
vscsi_crq crq; |
832 |
|
833 |
memcpy(crq.raw, crq_data, 16);
|
834 |
crq.s.timeout = be16_to_cpu(crq.s.timeout); |
835 |
crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
836 |
crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
837 |
|
838 |
dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); |
839 |
|
840 |
switch (crq.s.valid) {
|
841 |
case 0xc0: /* Init command/response */ |
842 |
|
843 |
/* Respond to initialization request */
|
844 |
if (crq.s.format == 0x01) { |
845 |
memset(crq.raw, 0, 16); |
846 |
crq.s.valid = 0xc0;
|
847 |
crq.s.format = 0x02;
|
848 |
spapr_vio_send_crq(dev, crq.raw); |
849 |
} |
850 |
|
851 |
/* Note that in hotplug cases, we might get a 0x02
|
852 |
* as a result of us emitting the init request
|
853 |
*/
|
854 |
|
855 |
break;
|
856 |
case 0xff: /* Link event */ |
857 |
|
858 |
/* Not handled for now */
|
859 |
|
860 |
break;
|
861 |
case 0x80: /* Payloads */ |
862 |
switch (crq.s.format) {
|
863 |
case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
864 |
case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
865 |
vscsi_got_payload(s, &crq); |
866 |
break;
|
867 |
case VIOSRP_OS400_FORMAT:
|
868 |
case VIOSRP_AIX_FORMAT:
|
869 |
case VIOSRP_LINUX_FORMAT:
|
870 |
case VIOSRP_INLINE_FORMAT:
|
871 |
fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
|
872 |
crq.s.format); |
873 |
break;
|
874 |
default:
|
875 |
fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
|
876 |
crq.s.format); |
877 |
} |
878 |
break;
|
879 |
default:
|
880 |
fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
|
881 |
crq.raw[0], crq.raw[1]); |
882 |
}; |
883 |
|
884 |
return 0; |
885 |
} |
886 |
|
887 |
static const struct SCSIBusInfo vscsi_scsi_info = { |
888 |
.tcq = true,
|
889 |
.max_channel = 7, /* logical unit addressing format */ |
890 |
.max_target = 63,
|
891 |
.max_lun = 31,
|
892 |
|
893 |
.transfer_data = vscsi_transfer_data, |
894 |
.complete = vscsi_command_complete, |
895 |
.cancel = vscsi_request_cancelled |
896 |
}; |
897 |
|
898 |
static void spapr_vscsi_reset(VIOsPAPRDevice *dev) |
899 |
{ |
900 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
901 |
int i;
|
902 |
|
903 |
memset(s->reqs, 0, sizeof(s->reqs)); |
904 |
for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
905 |
s->reqs[i].qtag = i; |
906 |
} |
907 |
} |
908 |
|
909 |
static int spapr_vscsi_init(VIOsPAPRDevice *dev) |
910 |
{ |
911 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
912 |
|
913 |
dev->crq.SendFunc = vscsi_do_crq; |
914 |
|
915 |
scsi_bus_new(&s->bus, &dev->qdev, &vscsi_scsi_info); |
916 |
if (!dev->qdev.hotplugged) {
|
917 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
918 |
} |
919 |
|
920 |
return 0; |
921 |
} |
922 |
|
923 |
void spapr_vscsi_create(VIOsPAPRBus *bus)
|
924 |
{ |
925 |
DeviceState *dev; |
926 |
|
927 |
dev = qdev_create(&bus->bus, "spapr-vscsi");
|
928 |
|
929 |
qdev_init_nofail(dev); |
930 |
} |
931 |
|
932 |
static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
933 |
{ |
934 |
int ret;
|
935 |
|
936 |
ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
937 |
if (ret < 0) { |
938 |
return ret;
|
939 |
} |
940 |
|
941 |
ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
942 |
if (ret < 0) { |
943 |
return ret;
|
944 |
} |
945 |
|
946 |
return 0; |
947 |
} |
948 |
|
949 |
static Property spapr_vscsi_properties[] = {
|
950 |
DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev), |
951 |
DEFINE_PROP_END_OF_LIST(), |
952 |
}; |
953 |
|
954 |
static void spapr_vscsi_class_init(ObjectClass *klass, void *data) |
955 |
{ |
956 |
DeviceClass *dc = DEVICE_CLASS(klass); |
957 |
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
958 |
|
959 |
k->init = spapr_vscsi_init; |
960 |
k->reset = spapr_vscsi_reset; |
961 |
k->devnode = spapr_vscsi_devnode; |
962 |
k->dt_name = "v-scsi";
|
963 |
k->dt_type = "vscsi";
|
964 |
k->dt_compatible = "IBM,v-scsi";
|
965 |
k->signal_mask = 0x00000001;
|
966 |
dc->props = spapr_vscsi_properties; |
967 |
k->rtce_window_size = 0x10000000;
|
968 |
} |
969 |
|
970 |
static const TypeInfo spapr_vscsi_info = { |
971 |
.name = "spapr-vscsi",
|
972 |
.parent = TYPE_VIO_SPAPR_DEVICE, |
973 |
.instance_size = sizeof(VSCSIState),
|
974 |
.class_init = spapr_vscsi_class_init, |
975 |
}; |
976 |
|
977 |
static void spapr_vscsi_register_types(void) |
978 |
{ |
979 |
type_register_static(&spapr_vscsi_info); |
980 |
} |
981 |
|
982 |
type_init(spapr_vscsi_register_types) |