1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2016 Jakub Klama <[email protected]>.
5 * Copyright (c) 2018 Marcelo Araujo <[email protected]>.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer
13 * in this position and unchanged.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/linker_set.h>
36 #include <sys/types.h>
37 #include <sys/uio.h>
38 #include <sys/time.h>
39 #include <sys/queue.h>
40 #include <sys/sbuf.h>
41
42 #include <errno.h>
43 #include <fcntl.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <stdbool.h>
47 #include <string.h>
48 #include <unistd.h>
49 #include <assert.h>
50 #include <pthread.h>
51 #include <pthread_np.h>
52
53 #include <cam/scsi/scsi_all.h>
54 #include <cam/scsi/scsi_message.h>
55 #include <cam/ctl/ctl.h>
56 #include <cam/ctl/ctl_io.h>
57 #include <cam/ctl/ctl_backend.h>
58 #include <cam/ctl/ctl_ioctl.h>
59 #include <cam/ctl/ctl_util.h>
60 #include <cam/ctl/ctl_scsi_all.h>
61 #include <camlib.h>
62
63 #include "bhyverun.h"
64 #include "config.h"
65 #include "debug.h"
66 #include "pci_emul.h"
67 #include "virtio.h"
68 #include "iov.h"
69
70 #define VTSCSI_RINGSZ 64
71 #define VTSCSI_REQUESTQ 1
72 #define VTSCSI_THR_PER_Q 16
73 #define VTSCSI_MAXQ (VTSCSI_REQUESTQ + 2)
74 #define VTSCSI_MAXSEG 64
75
76 #define VTSCSI_IN_HEADER_LEN(_sc) \
77 (sizeof(struct pci_vtscsi_req_cmd_rd) + _sc->vss_config.cdb_size)
78
79 #define VTSCSI_OUT_HEADER_LEN(_sc) \
80 (sizeof(struct pci_vtscsi_req_cmd_wr) + _sc->vss_config.sense_size)
81
82 #define VIRTIO_SCSI_MAX_CHANNEL 0
83 #define VIRTIO_SCSI_MAX_TARGET 0
84 #define VIRTIO_SCSI_MAX_LUN 16383
85
86 #define VIRTIO_SCSI_F_INOUT (1 << 0)
87 #define VIRTIO_SCSI_F_HOTPLUG (1 << 1)
88 #define VIRTIO_SCSI_F_CHANGE (1 << 2)
89
90 static int pci_vtscsi_debug = 0;
91 #define DPRINTF(params) if (pci_vtscsi_debug) PRINTLN params
92 #define WPRINTF(params) PRINTLN params
93
94 struct pci_vtscsi_config {
95 uint32_t num_queues;
96 uint32_t seg_max;
97 uint32_t max_sectors;
98 uint32_t cmd_per_lun;
99 uint32_t event_info_size;
100 uint32_t sense_size;
101 uint32_t cdb_size;
102 uint16_t max_channel;
103 uint16_t max_target;
104 uint32_t max_lun;
105 } __attribute__((packed));
106
107 struct pci_vtscsi_queue {
108 struct pci_vtscsi_softc * vsq_sc;
109 struct vqueue_info * vsq_vq;
110 pthread_mutex_t vsq_mtx;
111 pthread_mutex_t vsq_qmtx;
112 pthread_cond_t vsq_cv;
113 STAILQ_HEAD(, pci_vtscsi_request) vsq_requests;
114 LIST_HEAD(, pci_vtscsi_worker) vsq_workers;
115 };
116
117 struct pci_vtscsi_worker {
118 struct pci_vtscsi_queue * vsw_queue;
119 pthread_t vsw_thread;
120 bool vsw_exiting;
121 LIST_ENTRY(pci_vtscsi_worker) vsw_link;
122 };
123
124 struct pci_vtscsi_request {
125 struct pci_vtscsi_queue * vsr_queue;
126 struct iovec vsr_iov_in[VTSCSI_MAXSEG];
127 int vsr_niov_in;
128 struct iovec vsr_iov_out[VTSCSI_MAXSEG];
129 int vsr_niov_out;
130 uint32_t vsr_idx;
131 STAILQ_ENTRY(pci_vtscsi_request) vsr_link;
132 };
133
134 /*
135 * Per-device softc
136 */
137 struct pci_vtscsi_softc {
138 struct virtio_softc vss_vs;
139 struct vqueue_info vss_vq[VTSCSI_MAXQ];
140 struct pci_vtscsi_queue vss_queues[VTSCSI_REQUESTQ];
141 pthread_mutex_t vss_mtx;
142 int vss_iid;
143 int vss_ctl_fd;
144 uint32_t vss_features;
145 struct pci_vtscsi_config vss_config;
146 };
147
148 #define VIRTIO_SCSI_T_TMF 0
149 #define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
150 #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
151 #define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
152 #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
153 #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
154 #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
155 #define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
156 #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
157
158 /* command-specific response values */
159 #define VIRTIO_SCSI_S_FUNCTION_COMPLETE 0
160 #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
161 #define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
162
163 struct pci_vtscsi_ctrl_tmf {
164 uint32_t type;
165 uint32_t subtype;
166 uint8_t lun[8];
167 uint64_t id;
168 uint8_t response;
169 } __attribute__((packed));
170
171 #define VIRTIO_SCSI_T_AN_QUERY 1
172 #define VIRTIO_SCSI_EVT_ASYNC_OPERATIONAL_CHANGE 2
173 #define VIRTIO_SCSI_EVT_ASYNC_POWER_MGMT 4
174 #define VIRTIO_SCSI_EVT_ASYNC_EXTERNAL_REQUEST 8
175 #define VIRTIO_SCSI_EVT_ASYNC_MEDIA_CHANGE 16
176 #define VIRTIO_SCSI_EVT_ASYNC_MULTI_HOST 32
177 #define VIRTIO_SCSI_EVT_ASYNC_DEVICE_BUSY 64
178
179 struct pci_vtscsi_ctrl_an {
180 uint32_t type;
181 uint8_t lun[8];
182 uint32_t event_requested;
183 uint32_t event_actual;
184 uint8_t response;
185 } __attribute__((packed));
186
187 /* command-specific response values */
188 #define VIRTIO_SCSI_S_OK 0
189 #define VIRTIO_SCSI_S_OVERRUN 1
190 #define VIRTIO_SCSI_S_ABORTED 2
191 #define VIRTIO_SCSI_S_BAD_TARGET 3
192 #define VIRTIO_SCSI_S_RESET 4
193 #define VIRTIO_SCSI_S_BUSY 5
194 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
195 #define VIRTIO_SCSI_S_TARGET_FAILURE 7
196 #define VIRTIO_SCSI_S_NEXUS_FAILURE 8
197 #define VIRTIO_SCSI_S_FAILURE 9
198 #define VIRTIO_SCSI_S_INCORRECT_LUN 12
199
200 /* task_attr */
201 #define VIRTIO_SCSI_S_SIMPLE 0
202 #define VIRTIO_SCSI_S_ORDERED 1
203 #define VIRTIO_SCSI_S_HEAD 2
204 #define VIRTIO_SCSI_S_ACA 3
205
206 struct pci_vtscsi_event {
207 uint32_t event;
208 uint8_t lun[8];
209 uint32_t reason;
210 } __attribute__((packed));
211
212 struct pci_vtscsi_req_cmd_rd {
213 uint8_t lun[8];
214 uint64_t id;
215 uint8_t task_attr;
216 uint8_t prio;
217 uint8_t crn;
218 uint8_t cdb[];
219 } __attribute__((packed));
220
221 struct pci_vtscsi_req_cmd_wr {
222 uint32_t sense_len;
223 uint32_t residual;
224 uint16_t status_qualifier;
225 uint8_t status;
226 uint8_t response;
227 uint8_t sense[];
228 } __attribute__((packed));
229
230 static void *pci_vtscsi_proc(void *);
231 static void pci_vtscsi_reset(void *);
232 static void pci_vtscsi_neg_features(void *, uint64_t);
233 static int pci_vtscsi_cfgread(void *, int, int, uint32_t *);
234 static int pci_vtscsi_cfgwrite(void *, int, int, uint32_t);
235 static inline int pci_vtscsi_get_lun(uint8_t *);
236 static int pci_vtscsi_control_handle(struct pci_vtscsi_softc *, void *, size_t);
237 static int pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *,
238 struct pci_vtscsi_ctrl_tmf *);
239 static int pci_vtscsi_an_handle(struct pci_vtscsi_softc *,
240 struct pci_vtscsi_ctrl_an *);
241 static int pci_vtscsi_request_handle(struct pci_vtscsi_queue *, struct iovec *,
242 int, struct iovec *, int);
243 static void pci_vtscsi_controlq_notify(void *, struct vqueue_info *);
244 static void pci_vtscsi_eventq_notify(void *, struct vqueue_info *);
245 static void pci_vtscsi_requestq_notify(void *, struct vqueue_info *);
246 static int pci_vtscsi_init_queue(struct pci_vtscsi_softc *,
247 struct pci_vtscsi_queue *, int);
248 static int pci_vtscsi_init(struct vmctx *, struct pci_devinst *, nvlist_t *);
249
250 static struct virtio_consts vtscsi_vi_consts = {
251 "vtscsi", /* our name */
252 VTSCSI_MAXQ, /* we support 2+n virtqueues */
253 sizeof(struct pci_vtscsi_config), /* config reg size */
254 pci_vtscsi_reset, /* reset */
255 NULL, /* device-wide qnotify */
256 pci_vtscsi_cfgread, /* read virtio config */
257 pci_vtscsi_cfgwrite, /* write virtio config */
258 pci_vtscsi_neg_features, /* apply negotiated features */
259 0, /* our capabilities */
260 };
261
262 static void *
pci_vtscsi_proc(void * arg)263 pci_vtscsi_proc(void *arg)
264 {
265 struct pci_vtscsi_worker *worker = (struct pci_vtscsi_worker *)arg;
266 struct pci_vtscsi_queue *q = worker->vsw_queue;
267 struct pci_vtscsi_request *req;
268 int iolen;
269
270 for (;;) {
271 pthread_mutex_lock(&q->vsq_mtx);
272
273 while (STAILQ_EMPTY(&q->vsq_requests)
274 && !worker->vsw_exiting)
275 pthread_cond_wait(&q->vsq_cv, &q->vsq_mtx);
276
277 if (worker->vsw_exiting)
278 break;
279
280 req = STAILQ_FIRST(&q->vsq_requests);
281 STAILQ_REMOVE_HEAD(&q->vsq_requests, vsr_link);
282
283 pthread_mutex_unlock(&q->vsq_mtx);
284 iolen = pci_vtscsi_request_handle(q, req->vsr_iov_in,
285 req->vsr_niov_in, req->vsr_iov_out, req->vsr_niov_out);
286
287 pthread_mutex_lock(&q->vsq_qmtx);
288 vq_relchain(q->vsq_vq, req->vsr_idx, iolen);
289 vq_endchains(q->vsq_vq, 0);
290 pthread_mutex_unlock(&q->vsq_qmtx);
291
292 DPRINTF(("virtio-scsi: request <idx=%d> completed",
293 req->vsr_idx));
294 free(req);
295 }
296
297 pthread_mutex_unlock(&q->vsq_mtx);
298 return (NULL);
299 }
300
301 static void
pci_vtscsi_reset(void * vsc)302 pci_vtscsi_reset(void *vsc)
303 {
304 struct pci_vtscsi_softc *sc;
305
306 sc = vsc;
307
308 DPRINTF(("vtscsi: device reset requested"));
309 vi_reset_dev(&sc->vss_vs);
310
311 /* initialize config structure */
312 sc->vss_config = (struct pci_vtscsi_config){
313 .num_queues = VTSCSI_REQUESTQ,
314 /* Leave room for the request and the response. */
315 .seg_max = VTSCSI_MAXSEG - 2,
316 .max_sectors = 2,
317 .cmd_per_lun = 1,
318 .event_info_size = sizeof(struct pci_vtscsi_event),
319 .sense_size = 96,
320 .cdb_size = 32,
321 .max_channel = VIRTIO_SCSI_MAX_CHANNEL,
322 .max_target = VIRTIO_SCSI_MAX_TARGET,
323 .max_lun = VIRTIO_SCSI_MAX_LUN
324 };
325 }
326
327 static void
pci_vtscsi_neg_features(void * vsc,uint64_t negotiated_features)328 pci_vtscsi_neg_features(void *vsc, uint64_t negotiated_features)
329 {
330 struct pci_vtscsi_softc *sc = vsc;
331
332 sc->vss_features = negotiated_features;
333 }
334
335 static int
pci_vtscsi_cfgread(void * vsc,int offset,int size,uint32_t * retval)336 pci_vtscsi_cfgread(void *vsc, int offset, int size, uint32_t *retval)
337 {
338 struct pci_vtscsi_softc *sc = vsc;
339 void *ptr;
340
341 ptr = (uint8_t *)&sc->vss_config + offset;
342 memcpy(retval, ptr, size);
343 return (0);
344 }
345
346 static int
pci_vtscsi_cfgwrite(void * vsc,int offset,int size,uint32_t val)347 pci_vtscsi_cfgwrite(void *vsc, int offset, int size, uint32_t val)
348 {
349
350 return (0);
351 }
352
353 static inline int
pci_vtscsi_get_lun(uint8_t * lun)354 pci_vtscsi_get_lun(uint8_t *lun)
355 {
356
357 return (((lun[2] << 8) | lun[3]) & 0x3fff);
358 }
359
360 static int
pci_vtscsi_control_handle(struct pci_vtscsi_softc * sc,void * buf,size_t bufsize)361 pci_vtscsi_control_handle(struct pci_vtscsi_softc *sc, void *buf,
362 size_t bufsize)
363 {
364 struct pci_vtscsi_ctrl_tmf *tmf;
365 struct pci_vtscsi_ctrl_an *an;
366 uint32_t type;
367
368 type = *(uint32_t *)buf;
369
370 if (type == VIRTIO_SCSI_T_TMF) {
371 tmf = (struct pci_vtscsi_ctrl_tmf *)buf;
372 return (pci_vtscsi_tmf_handle(sc, tmf));
373 }
374
375 if (type == VIRTIO_SCSI_T_AN_QUERY) {
376 an = (struct pci_vtscsi_ctrl_an *)buf;
377 return (pci_vtscsi_an_handle(sc, an));
378 }
379
380 return (0);
381 }
382
383 static int
pci_vtscsi_tmf_handle(struct pci_vtscsi_softc * sc,struct pci_vtscsi_ctrl_tmf * tmf)384 pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *sc,
385 struct pci_vtscsi_ctrl_tmf *tmf)
386 {
387 union ctl_io *io;
388 int err;
389
390 io = ctl_scsi_alloc_io(sc->vss_iid);
391 ctl_scsi_zero_io(io);
392
393 io->io_hdr.io_type = CTL_IO_TASK;
394 io->io_hdr.nexus.initid = sc->vss_iid;
395 io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(tmf->lun);
396 io->taskio.tag_type = CTL_TAG_SIMPLE;
397 io->taskio.tag_num = (uint32_t)tmf->id;
398
399 switch (tmf->subtype) {
400 case VIRTIO_SCSI_T_TMF_ABORT_TASK:
401 io->taskio.task_action = CTL_TASK_ABORT_TASK;
402 break;
403
404 case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET:
405 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
406 break;
407
408 case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
409 io->taskio.task_action = CTL_TASK_CLEAR_ACA;
410 break;
411
412 case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET:
413 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET;
414 break;
415
416 case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
417 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET;
418 break;
419
420 case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
421 io->taskio.task_action = CTL_TASK_LUN_RESET;
422 break;
423
424 case VIRTIO_SCSI_T_TMF_QUERY_TASK:
425 io->taskio.task_action = CTL_TASK_QUERY_TASK;
426 break;
427
428 case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET:
429 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET;
430 break;
431 }
432
433 if (pci_vtscsi_debug) {
434 struct sbuf *sb = sbuf_new_auto();
435 ctl_io_sbuf(io, sb);
436 sbuf_finish(sb);
437 DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb)));
438 sbuf_delete(sb);
439 }
440
441 err = ioctl(sc->vss_ctl_fd, CTL_IO, io);
442 if (err != 0)
443 WPRINTF(("CTL_IO: err=%d (%s)", errno, strerror(errno)));
444
445 tmf->response = io->taskio.task_status;
446 ctl_scsi_free_io(io);
447 return (1);
448 }
449
450 static int
pci_vtscsi_an_handle(struct pci_vtscsi_softc * sc,struct pci_vtscsi_ctrl_an * an)451 pci_vtscsi_an_handle(struct pci_vtscsi_softc *sc,
452 struct pci_vtscsi_ctrl_an *an)
453 {
454
455 return (0);
456 }
457
458 static int
pci_vtscsi_request_handle(struct pci_vtscsi_queue * q,struct iovec * iov_in,int niov_in,struct iovec * iov_out,int niov_out)459 pci_vtscsi_request_handle(struct pci_vtscsi_queue *q, struct iovec *iov_in,
460 int niov_in, struct iovec *iov_out, int niov_out)
461 {
462 struct pci_vtscsi_softc *sc = q->vsq_sc;
463 struct pci_vtscsi_req_cmd_rd *cmd_rd = NULL;
464 struct pci_vtscsi_req_cmd_wr *cmd_wr;
465 struct iovec data_iov_in[VTSCSI_MAXSEG], data_iov_out[VTSCSI_MAXSEG];
466 union ctl_io *io;
467 int data_niov_in, data_niov_out;
468 void *ext_data_ptr = NULL;
469 uint32_t ext_data_len = 0, ext_sg_entries = 0;
470 int err, nxferred;
471
472 seek_iov(iov_in, niov_in, data_iov_in, &data_niov_in,
473 VTSCSI_IN_HEADER_LEN(sc));
474 seek_iov(iov_out, niov_out, data_iov_out, &data_niov_out,
475 VTSCSI_OUT_HEADER_LEN(sc));
476
477 truncate_iov(iov_in, &niov_in, VTSCSI_IN_HEADER_LEN(sc));
478 truncate_iov(iov_out, &niov_out, VTSCSI_OUT_HEADER_LEN(sc));
479 iov_to_buf(iov_in, niov_in, (void **)&cmd_rd);
480
481 cmd_wr = malloc(VTSCSI_OUT_HEADER_LEN(sc));
482 io = ctl_scsi_alloc_io(sc->vss_iid);
483 ctl_scsi_zero_io(io);
484
485 io->io_hdr.nexus.initid = sc->vss_iid;
486 io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(cmd_rd->lun);
487
488 io->io_hdr.io_type = CTL_IO_SCSI;
489
490 if (data_niov_in > 0) {
491 ext_data_ptr = (void *)data_iov_in;
492 ext_sg_entries = data_niov_in;
493 ext_data_len = count_iov(data_iov_in, data_niov_in);
494 io->io_hdr.flags |= CTL_FLAG_DATA_OUT;
495 } else if (data_niov_out > 0) {
496 ext_data_ptr = (void *)data_iov_out;
497 ext_sg_entries = data_niov_out;
498 ext_data_len = count_iov(data_iov_out, data_niov_out);
499 io->io_hdr.flags |= CTL_FLAG_DATA_IN;
500 }
501
502 io->scsiio.sense_len = sc->vss_config.sense_size;
503 io->scsiio.tag_num = (uint32_t)cmd_rd->id;
504 switch (cmd_rd->task_attr) {
505 case VIRTIO_SCSI_S_ORDERED:
506 io->scsiio.tag_type = CTL_TAG_ORDERED;
507 break;
508 case VIRTIO_SCSI_S_HEAD:
509 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
510 break;
511 case VIRTIO_SCSI_S_ACA:
512 io->scsiio.tag_type = CTL_TAG_ACA;
513 break;
514 case VIRTIO_SCSI_S_SIMPLE:
515 default:
516 io->scsiio.tag_type = CTL_TAG_SIMPLE;
517 break;
518 }
519 io->scsiio.ext_sg_entries = ext_sg_entries;
520 io->scsiio.ext_data_ptr = ext_data_ptr;
521 io->scsiio.ext_data_len = ext_data_len;
522 io->scsiio.ext_data_filled = 0;
523 io->scsiio.cdb_len = sc->vss_config.cdb_size;
524 memcpy(io->scsiio.cdb, cmd_rd->cdb, sc->vss_config.cdb_size);
525
526 if (pci_vtscsi_debug) {
527 struct sbuf *sb = sbuf_new_auto();
528 ctl_io_sbuf(io, sb);
529 sbuf_finish(sb);
530 DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb)));
531 sbuf_delete(sb);
532 }
533
534 err = ioctl(sc->vss_ctl_fd, CTL_IO, io);
535 if (err != 0) {
536 WPRINTF(("CTL_IO: err=%d (%s)", errno, strerror(errno)));
537 cmd_wr->response = VIRTIO_SCSI_S_FAILURE;
538 } else {
539 cmd_wr->sense_len = MIN(io->scsiio.sense_len,
540 sc->vss_config.sense_size);
541 cmd_wr->residual = io->scsiio.residual;
542 cmd_wr->status = io->scsiio.scsi_status;
543 cmd_wr->response = VIRTIO_SCSI_S_OK;
544 memcpy(&cmd_wr->sense, &io->scsiio.sense_data,
545 cmd_wr->sense_len);
546 }
547
548 buf_to_iov(cmd_wr, VTSCSI_OUT_HEADER_LEN(sc), iov_out, niov_out, 0);
549 nxferred = VTSCSI_OUT_HEADER_LEN(sc) + io->scsiio.ext_data_filled;
550 free(cmd_rd);
551 free(cmd_wr);
552 ctl_scsi_free_io(io);
553 return (nxferred);
554 }
555
556 static void
pci_vtscsi_controlq_notify(void * vsc,struct vqueue_info * vq)557 pci_vtscsi_controlq_notify(void *vsc, struct vqueue_info *vq)
558 {
559 struct pci_vtscsi_softc *sc;
560 struct iovec iov[VTSCSI_MAXSEG];
561 struct vi_req req;
562 void *buf = NULL;
563 size_t bufsize;
564 int iolen, n;
565
566 sc = vsc;
567
568 while (vq_has_descs(vq)) {
569 n = vq_getchain(vq, iov, VTSCSI_MAXSEG, &req);
570 assert(n >= 1 && n <= VTSCSI_MAXSEG);
571
572 bufsize = iov_to_buf(iov, n, &buf);
573 iolen = pci_vtscsi_control_handle(sc, buf, bufsize);
574 buf_to_iov(buf + bufsize - iolen, iolen, iov, n,
575 bufsize - iolen);
576
577 /*
578 * Release this chain and handle more
579 */
580 vq_relchain(vq, req.idx, iolen);
581 }
582 vq_endchains(vq, 1); /* Generate interrupt if appropriate. */
583 free(buf);
584 }
585
586 static void
pci_vtscsi_eventq_notify(void * vsc,struct vqueue_info * vq)587 pci_vtscsi_eventq_notify(void *vsc, struct vqueue_info *vq)
588 {
589
590 vq_kick_disable(vq);
591 }
592
593 static void
pci_vtscsi_requestq_notify(void * vsc,struct vqueue_info * vq)594 pci_vtscsi_requestq_notify(void *vsc, struct vqueue_info *vq)
595 {
596 struct pci_vtscsi_softc *sc;
597 struct pci_vtscsi_queue *q;
598 struct pci_vtscsi_request *req;
599 struct iovec iov[VTSCSI_MAXSEG];
600 struct vi_req vireq;
601 int n;
602
603 sc = vsc;
604 q = &sc->vss_queues[vq->vq_num - 2];
605
606 while (vq_has_descs(vq)) {
607 n = vq_getchain(vq, iov, VTSCSI_MAXSEG, &vireq);
608 assert(n >= 1 && n <= VTSCSI_MAXSEG);
609
610 req = calloc(1, sizeof(struct pci_vtscsi_request));
611 req->vsr_idx = vireq.idx;
612 req->vsr_queue = q;
613 req->vsr_niov_in = vireq.readable;
614 req->vsr_niov_out = vireq.writable;
615 memcpy(req->vsr_iov_in, iov,
616 req->vsr_niov_in * sizeof(struct iovec));
617 memcpy(req->vsr_iov_out, iov + vireq.readable,
618 req->vsr_niov_out * sizeof(struct iovec));
619
620 pthread_mutex_lock(&q->vsq_mtx);
621 STAILQ_INSERT_TAIL(&q->vsq_requests, req, vsr_link);
622 pthread_cond_signal(&q->vsq_cv);
623 pthread_mutex_unlock(&q->vsq_mtx);
624
625 DPRINTF(("virtio-scsi: request <idx=%d> enqueued",
626 vireq.idx));
627 }
628 }
629
630 static int
pci_vtscsi_init_queue(struct pci_vtscsi_softc * sc,struct pci_vtscsi_queue * queue,int num)631 pci_vtscsi_init_queue(struct pci_vtscsi_softc *sc,
632 struct pci_vtscsi_queue *queue, int num)
633 {
634 struct pci_vtscsi_worker *worker;
635 char tname[MAXCOMLEN + 1];
636 int i;
637
638 queue->vsq_sc = sc;
639 queue->vsq_vq = &sc->vss_vq[num + 2];
640
641 pthread_mutex_init(&queue->vsq_mtx, NULL);
642 pthread_mutex_init(&queue->vsq_qmtx, NULL);
643 pthread_cond_init(&queue->vsq_cv, NULL);
644 STAILQ_INIT(&queue->vsq_requests);
645 LIST_INIT(&queue->vsq_workers);
646
647 for (i = 0; i < VTSCSI_THR_PER_Q; i++) {
648 worker = calloc(1, sizeof(struct pci_vtscsi_worker));
649 worker->vsw_queue = queue;
650
651 pthread_create(&worker->vsw_thread, NULL, &pci_vtscsi_proc,
652 (void *)worker);
653
654 snprintf(tname, sizeof(tname), "vtscsi:%d-%d", num, i);
655 pthread_set_name_np(worker->vsw_thread, tname);
656 LIST_INSERT_HEAD(&queue->vsq_workers, worker, vsw_link);
657 }
658
659 return (0);
660 }
661
662 static int
pci_vtscsi_legacy_config(nvlist_t * nvl,const char * opts)663 pci_vtscsi_legacy_config(nvlist_t *nvl, const char *opts)
664 {
665 char *cp, *devname;
666
667 if (opts == NULL)
668 return (0);
669
670 cp = strchr(opts, ',');
671 if (cp == NULL) {
672 set_config_value_node(nvl, "dev", opts);
673 return (0);
674 }
675 devname = strndup(opts, cp - opts);
676 set_config_value_node(nvl, "dev", devname);
677 free(devname);
678 return (pci_parse_legacy_config(nvl, cp + 1));
679 }
680
681 static int
pci_vtscsi_init(struct vmctx * ctx,struct pci_devinst * pi,nvlist_t * nvl)682 pci_vtscsi_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
683 {
684 struct pci_vtscsi_softc *sc;
685 const char *devname, *value;
686 int i;
687
688 sc = calloc(1, sizeof(struct pci_vtscsi_softc));
689 value = get_config_value_node(nvl, "iid");
690 if (value != NULL)
691 sc->vss_iid = strtoul(value, NULL, 10);
692
693 devname = get_config_value_node(nvl, "dev");
694 if (devname == NULL)
695 devname = "/dev/cam/ctl";
696 sc->vss_ctl_fd = open(devname, O_RDWR);
697 if (sc->vss_ctl_fd < 0) {
698 WPRINTF(("cannot open %s: %s", devname, strerror(errno)));
699 free(sc);
700 return (1);
701 }
702
703 vi_softc_linkup(&sc->vss_vs, &vtscsi_vi_consts, sc, pi, sc->vss_vq);
704 sc->vss_vs.vs_mtx = &sc->vss_mtx;
705
706 /* controlq */
707 sc->vss_vq[0].vq_qsize = VTSCSI_RINGSZ;
708 sc->vss_vq[0].vq_notify = pci_vtscsi_controlq_notify;
709
710 /* eventq */
711 sc->vss_vq[1].vq_qsize = VTSCSI_RINGSZ;
712 sc->vss_vq[1].vq_notify = pci_vtscsi_eventq_notify;
713
714 /* request queues */
715 for (i = 2; i < VTSCSI_MAXQ; i++) {
716 sc->vss_vq[i].vq_qsize = VTSCSI_RINGSZ;
717 sc->vss_vq[i].vq_notify = pci_vtscsi_requestq_notify;
718 pci_vtscsi_init_queue(sc, &sc->vss_queues[i - 2], i - 2);
719 }
720
721 /* initialize config space */
722 pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_SCSI);
723 pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR);
724 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_STORAGE);
725 pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_ID_SCSI);
726 pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR);
727
728 if (vi_intr_init(&sc->vss_vs, 1, fbsdrun_virtio_msix()))
729 return (1);
730 vi_set_io_bar(&sc->vss_vs, 0);
731
732 return (0);
733 }
734
735
736 struct pci_devemu pci_de_vscsi = {
737 .pe_emu = "virtio-scsi",
738 .pe_init = pci_vtscsi_init,
739 .pe_legacy_config = pci_vtscsi_legacy_config,
740 .pe_barwrite = vi_pci_write,
741 .pe_barread = vi_pci_read
742 };
743 PCI_EMUL_SET(pci_de_vscsi);
744