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usr.sbin/bhyve/mmio/mmio_virtio_scsi.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2016 Jakub Klama <jceel@FreeBSD.org>.
* Copyright (c) 2018 Marcelo Araujo <araujo@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/linker_set.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <pthread.h>
#include <pthread_np.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/ctl/ctl.h>
#include <cam/ctl/ctl_io.h>
#include <cam/ctl/ctl_backend.h>
#include <cam/ctl/ctl_ioctl.h>
#include <cam/ctl/ctl_util.h>
#include <cam/ctl/ctl_scsi_all.h>
#include <camlib.h>
#include "bhyverun.h"
#include "debug.h"
#include "iov.h"
#include "mmio_emul.h"
#include "mmio_virtio.h"
#define VTSCSI_RINGSZ 64
#define VTSCSI_REQUESTQ 1
#define VTSCSI_THR_PER_Q 16
#define VTSCSI_MAXQ (VTSCSI_REQUESTQ + 2)
#define VTSCSI_MAXSEG 64
#define VTSCSI_IN_HEADER_LEN(_sc) \
(sizeof(struct pci_vtscsi_req_cmd_rd) + _sc->vss_config.cdb_size)
#define VTSCSI_OUT_HEADER_LEN(_sc) \
(sizeof(struct pci_vtscsi_req_cmd_wr) + _sc->vss_config.sense_size)
#define VIRTIO_SCSI_MAX_CHANNEL 0
#define VIRTIO_SCSI_MAX_TARGET 0
#define VIRTIO_SCSI_MAX_LUN 16383
#define VIRTIO_SCSI_F_INOUT (1 << 0)
#define VIRTIO_SCSI_F_HOTPLUG (1 << 1)
#define VIRTIO_SCSI_F_CHANGE (1 << 2)
static int pci_vtscsi_debug = 0;
#define DPRINTF(params) if (pci_vtscsi_debug) PRINTLN params
#define WPRINTF(params) PRINTLN params
struct pci_vtscsi_config {
uint32_t num_queues;
uint32_t seg_max;
uint32_t max_sectors;
uint32_t cmd_per_lun;
uint32_t event_info_size;
uint32_t sense_size;
uint32_t cdb_size;
uint16_t max_channel;
uint16_t max_target;
uint32_t max_lun;
} __attribute__((packed));
struct pci_vtscsi_queue {
struct pci_vtscsi_softc * vsq_sc;
struct vqueue_info * vsq_vq;
pthread_mutex_t vsq_mtx;
pthread_mutex_t vsq_qmtx;
pthread_cond_t vsq_cv;
STAILQ_HEAD(, pci_vtscsi_request) vsq_requests;
LIST_HEAD(, pci_vtscsi_worker) vsq_workers;
};
struct pci_vtscsi_worker {
struct pci_vtscsi_queue * vsw_queue;
pthread_t vsw_thread;
bool vsw_exiting;
LIST_ENTRY(pci_vtscsi_worker) vsw_link;
};
struct pci_vtscsi_request {
struct pci_vtscsi_queue * vsr_queue;
struct iovec vsr_iov_in[VTSCSI_MAXSEG];
int vsr_niov_in;
struct iovec vsr_iov_out[VTSCSI_MAXSEG];
int vsr_niov_out;
uint32_t vsr_idx;
STAILQ_ENTRY(pci_vtscsi_request) vsr_link;
};
/*
* Per-device softc
*/
struct pci_vtscsi_softc {
struct virtio_softc vss_vs;
struct vqueue_info vss_vq[VTSCSI_MAXQ];
struct pci_vtscsi_queue vss_queues[VTSCSI_REQUESTQ];
pthread_mutex_t vss_mtx;
int vss_iid;
int vss_ctl_fd;
uint32_t vss_features;
struct pci_vtscsi_config vss_config;
};
#define VIRTIO_SCSI_T_TMF 0
#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
/* command-specific response values */
#define VIRTIO_SCSI_S_FUNCTION_COMPLETE 0
#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
struct pci_vtscsi_ctrl_tmf {
uint32_t type;
uint32_t subtype;
uint8_t lun[8];
uint64_t id;
uint8_t response;
} __attribute__((packed));
#define VIRTIO_SCSI_T_AN_QUERY 1
#define VIRTIO_SCSI_EVT_ASYNC_OPERATIONAL_CHANGE 2
#define VIRTIO_SCSI_EVT_ASYNC_POWER_MGMT 4
#define VIRTIO_SCSI_EVT_ASYNC_EXTERNAL_REQUEST 8
#define VIRTIO_SCSI_EVT_ASYNC_MEDIA_CHANGE 16
#define VIRTIO_SCSI_EVT_ASYNC_MULTI_HOST 32
#define VIRTIO_SCSI_EVT_ASYNC_DEVICE_BUSY 64
struct pci_vtscsi_ctrl_an {
uint32_t type;
uint8_t lun[8];
uint32_t event_requested;
uint32_t event_actual;
uint8_t response;
} __attribute__((packed));
/* command-specific response values */
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
#define VIRTIO_SCSI_S_ABORTED 2
#define VIRTIO_SCSI_S_BAD_TARGET 3
#define VIRTIO_SCSI_S_RESET 4
#define VIRTIO_SCSI_S_BUSY 5
#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
#define VIRTIO_SCSI_S_TARGET_FAILURE 7
#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
#define VIRTIO_SCSI_S_FAILURE 9
#define VIRTIO_SCSI_S_INCORRECT_LUN 12
/* task_attr */
#define VIRTIO_SCSI_S_SIMPLE 0
#define VIRTIO_SCSI_S_ORDERED 1
#define VIRTIO_SCSI_S_HEAD 2
#define VIRTIO_SCSI_S_ACA 3
struct pci_vtscsi_event {
uint32_t event;
uint8_t lun[8];
uint32_t reason;
} __attribute__((packed));
struct pci_vtscsi_req_cmd_rd {
uint8_t lun[8];
uint64_t id;
uint8_t task_attr;
uint8_t prio;
uint8_t crn;
uint8_t cdb[];
} __attribute__((packed));
struct pci_vtscsi_req_cmd_wr {
uint32_t sense_len;
uint32_t residual;
uint16_t status_qualifier;
uint8_t status;
uint8_t response;
uint8_t sense[];
} __attribute__((packed));
static void *pci_vtscsi_proc(void *);
static void pci_vtscsi_reset(void *);
static void pci_vtscsi_neg_features(void *, uint64_t);
static int pci_vtscsi_cfgread(void *, int, int, uint32_t *);
static int pci_vtscsi_cfgwrite(void *, int, int, uint32_t);
static inline int pci_vtscsi_get_lun(uint8_t *);
static int pci_vtscsi_control_handle(struct pci_vtscsi_softc *, void *, size_t);
static int pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *,
struct pci_vtscsi_ctrl_tmf *);
static int pci_vtscsi_an_handle(struct pci_vtscsi_softc *,
struct pci_vtscsi_ctrl_an *);
static int pci_vtscsi_request_handle(struct pci_vtscsi_queue *, struct iovec *,
int, struct iovec *, int);
static void pci_vtscsi_controlq_notify(void *, struct vqueue_info *);
static void pci_vtscsi_eventq_notify(void *, struct vqueue_info *);
static void pci_vtscsi_requestq_notify(void *, struct vqueue_info *);
static int pci_vtscsi_init_queue(struct pci_vtscsi_softc *,
struct pci_vtscsi_queue *, int);
static int pci_vtscsi_init(struct vmctx *, struct mmio_devinst *, char *);
static struct virtio_consts vtscsi_vi_consts = {
"vtscsi", /* our name */
VTSCSI_MAXQ, /* we support 2+n virtqueues */
sizeof(struct pci_vtscsi_config), /* config reg size */
pci_vtscsi_reset, /* reset */
NULL, /* device-wide qnotify */
pci_vtscsi_cfgread, /* read virtio config */
pci_vtscsi_cfgwrite, /* write virtio config */
pci_vtscsi_neg_features, /* apply negotiated features */
0, /* our capabilities */
};
static void *
pci_vtscsi_proc(void *arg)
{
struct pci_vtscsi_worker *worker = (struct pci_vtscsi_worker *)arg;
struct pci_vtscsi_queue *q = worker->vsw_queue;
struct pci_vtscsi_request *req;
int iolen;
for (;;) {
pthread_mutex_lock(&q->vsq_mtx);
while (STAILQ_EMPTY(&q->vsq_requests)
&& !worker->vsw_exiting)
pthread_cond_wait(&q->vsq_cv, &q->vsq_mtx);
if (worker->vsw_exiting)
break;
req = STAILQ_FIRST(&q->vsq_requests);
STAILQ_REMOVE_HEAD(&q->vsq_requests, vsr_link);
pthread_mutex_unlock(&q->vsq_mtx);
iolen = pci_vtscsi_request_handle(q, req->vsr_iov_in,
req->vsr_niov_in, req->vsr_iov_out, req->vsr_niov_out);
pthread_mutex_lock(&q->vsq_qmtx);
vq_relchain(q->vsq_vq, req->vsr_idx, iolen);
vq_endchains(q->vsq_vq, 0);
pthread_mutex_unlock(&q->vsq_qmtx);
DPRINTF(("virtio-scsi: request <idx=%d> completed",
req->vsr_idx));
free(req);
}
pthread_mutex_unlock(&q->vsq_mtx);
return (NULL);
}
static void
pci_vtscsi_reset(void *vsc)
{
struct pci_vtscsi_softc *sc;
sc = vsc;
DPRINTF(("vtscsi: device reset requested"));
vi_reset_dev(&sc->vss_vs);
/* initialize config structure */
sc->vss_config = (struct pci_vtscsi_config){
.num_queues = VTSCSI_REQUESTQ,
/* Leave room for the request and the response. */
.seg_max = VTSCSI_MAXSEG - 2,
.max_sectors = 2,
.cmd_per_lun = 1,
.event_info_size = sizeof(struct pci_vtscsi_event),
.sense_size = 96,
.cdb_size = 32,
.max_channel = VIRTIO_SCSI_MAX_CHANNEL,
.max_target = VIRTIO_SCSI_MAX_TARGET,
.max_lun = VIRTIO_SCSI_MAX_LUN
};
}
static void
pci_vtscsi_neg_features(void *vsc, uint64_t negotiated_features)
{
struct pci_vtscsi_softc *sc = vsc;
sc->vss_features = negotiated_features;
}
static int
pci_vtscsi_cfgread(void *vsc, int offset, int size, uint32_t *retval)
{
struct pci_vtscsi_softc *sc = vsc;
void *ptr;
ptr = (uint8_t *)&sc->vss_config + offset;
memcpy(retval, ptr, size);
return (0);
}
static int
pci_vtscsi_cfgwrite(void *vsc, int offset, int size, uint32_t val)
{
return (0);
}
static inline int
pci_vtscsi_get_lun(uint8_t *lun)
{
return (((lun[2] << 8) | lun[3]) & 0x3fff);
}
static int
pci_vtscsi_control_handle(struct pci_vtscsi_softc *sc, void *buf,
size_t bufsize)
{
struct pci_vtscsi_ctrl_tmf *tmf;
struct pci_vtscsi_ctrl_an *an;
uint32_t type;
type = *(uint32_t *)buf;
if (type == VIRTIO_SCSI_T_TMF) {
tmf = (struct pci_vtscsi_ctrl_tmf *)buf;
return (pci_vtscsi_tmf_handle(sc, tmf));
}
if (type == VIRTIO_SCSI_T_AN_QUERY) {
an = (struct pci_vtscsi_ctrl_an *)buf;
return (pci_vtscsi_an_handle(sc, an));
}
return (0);
}
static int
pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *sc,
struct pci_vtscsi_ctrl_tmf *tmf)
{
union ctl_io *io;
int err;
io = ctl_scsi_alloc_io(sc->vss_iid);
ctl_scsi_zero_io(io);
io->io_hdr.io_type = CTL_IO_TASK;
io->io_hdr.nexus.initid = sc->vss_iid;
io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(tmf->lun);
io->taskio.tag_type = CTL_TAG_SIMPLE;
io->taskio.tag_num = (uint32_t)tmf->id;
switch (tmf->subtype) {
case VIRTIO_SCSI_T_TMF_ABORT_TASK:
io->taskio.task_action = CTL_TASK_ABORT_TASK;
break;
case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET:
io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
break;
case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
io->taskio.task_action = CTL_TASK_CLEAR_ACA;
break;
case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET:
io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET;
break;
case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET;
break;
case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
io->taskio.task_action = CTL_TASK_LUN_RESET;
break;
case VIRTIO_SCSI_T_TMF_QUERY_TASK:
io->taskio.task_action = CTL_TASK_QUERY_TASK;
break;
case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET:
io->taskio.task_action = CTL_TASK_QUERY_TASK_SET;
break;
}
if (pci_vtscsi_debug) {
struct sbuf *sb = sbuf_new_auto();
ctl_io_sbuf(io, sb);
sbuf_finish(sb);
DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb)));
sbuf_delete(sb);
}
err = ioctl(sc->vss_ctl_fd, CTL_IO, io);
if (err != 0)
WPRINTF(("CTL_IO: err=%d (%s)", errno, strerror(errno)));
tmf->response = io->taskio.task_status;
ctl_scsi_free_io(io);
return (1);
}
static int
pci_vtscsi_an_handle(struct pci_vtscsi_softc *sc,
struct pci_vtscsi_ctrl_an *an)
{
return (0);
}
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)
{
struct pci_vtscsi_softc *sc = q->vsq_sc;
struct pci_vtscsi_req_cmd_rd *cmd_rd = NULL;
struct pci_vtscsi_req_cmd_wr *cmd_wr;
struct iovec data_iov_in[VTSCSI_MAXSEG], data_iov_out[VTSCSI_MAXSEG];
union ctl_io *io;
int data_niov_in, data_niov_out;
void *ext_data_ptr = NULL;
uint32_t ext_data_len = 0, ext_sg_entries = 0;
int err, nxferred;
seek_iov(iov_in, niov_in, data_iov_in, &data_niov_in,
VTSCSI_IN_HEADER_LEN(sc));
seek_iov(iov_out, niov_out, data_iov_out, &data_niov_out,
VTSCSI_OUT_HEADER_LEN(sc));
truncate_iov(iov_in, &niov_in, VTSCSI_IN_HEADER_LEN(sc));
truncate_iov(iov_out, &niov_out, VTSCSI_OUT_HEADER_LEN(sc));
iov_to_buf(iov_in, niov_in, (void **)&cmd_rd);
cmd_wr = malloc(VTSCSI_OUT_HEADER_LEN(sc));
io = ctl_scsi_alloc_io(sc->vss_iid);
ctl_scsi_zero_io(io);
io->io_hdr.nexus.initid = sc->vss_iid;
io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(cmd_rd->lun);
io->io_hdr.io_type = CTL_IO_SCSI;
if (data_niov_in > 0) {
ext_data_ptr = (void *)data_iov_in;
ext_sg_entries = data_niov_in;
ext_data_len = count_iov(data_iov_in, data_niov_in);
io->io_hdr.flags |= CTL_FLAG_DATA_OUT;
} else if (data_niov_out > 0) {
ext_data_ptr = (void *)data_iov_out;
ext_sg_entries = data_niov_out;
ext_data_len = count_iov(data_iov_out, data_niov_out);
io->io_hdr.flags |= CTL_FLAG_DATA_IN;
}
io->scsiio.sense_len = sc->vss_config.sense_size;
io->scsiio.tag_num = (uint32_t)cmd_rd->id;
switch (cmd_rd->task_attr) {
case VIRTIO_SCSI_S_ORDERED:
io->scsiio.tag_type = CTL_TAG_ORDERED;
break;
case VIRTIO_SCSI_S_HEAD:
io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
break;
case VIRTIO_SCSI_S_ACA:
io->scsiio.tag_type = CTL_TAG_ACA;
break;
case VIRTIO_SCSI_S_SIMPLE:
default:
io->scsiio.tag_type = CTL_TAG_SIMPLE;
break;
}
io->scsiio.ext_sg_entries = ext_sg_entries;
io->scsiio.ext_data_ptr = ext_data_ptr;
io->scsiio.ext_data_len = ext_data_len;
io->scsiio.ext_data_filled = 0;
io->scsiio.cdb_len = sc->vss_config.cdb_size;
memcpy(io->scsiio.cdb, cmd_rd->cdb, sc->vss_config.cdb_size);
if (pci_vtscsi_debug) {
struct sbuf *sb = sbuf_new_auto();
ctl_io_sbuf(io, sb);
sbuf_finish(sb);
DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb)));
sbuf_delete(sb);
}
err = ioctl(sc->vss_ctl_fd, CTL_IO, io);
if (err != 0) {
WPRINTF(("CTL_IO: err=%d (%s)", errno, strerror(errno)));
cmd_wr->response = VIRTIO_SCSI_S_FAILURE;
} else {
cmd_wr->sense_len = MIN(io->scsiio.sense_len,
sc->vss_config.sense_size);
cmd_wr->residual = io->scsiio.residual;
cmd_wr->status = io->scsiio.scsi_status;
cmd_wr->response = VIRTIO_SCSI_S_OK;
memcpy(&cmd_wr->sense, &io->scsiio.sense_data,
cmd_wr->sense_len);
}
buf_to_iov(cmd_wr, VTSCSI_OUT_HEADER_LEN(sc), iov_out, niov_out, 0);
nxferred = VTSCSI_OUT_HEADER_LEN(sc) + io->scsiio.ext_data_filled;
free(cmd_rd);
free(cmd_wr);
ctl_scsi_free_io(io);
return (nxferred);
}
static void
pci_vtscsi_controlq_notify(void *vsc, struct vqueue_info *vq)
{
struct pci_vtscsi_softc *sc;
struct iovec iov[VTSCSI_MAXSEG];
uint16_t idx, n;
void *buf = NULL;
size_t bufsize;
int iolen;
sc = vsc;
while (vq_has_descs(vq)) {
n = vq_getchain(vq, &idx, iov, VTSCSI_MAXSEG, NULL);
bufsize = iov_to_buf(iov, n, &buf);
iolen = pci_vtscsi_control_handle(sc, buf, bufsize);
buf_to_iov(buf + bufsize - iolen, iolen, iov, n,
bufsize - iolen);
/*
* Release this chain and handle more
*/
vq_relchain(vq, idx, iolen);
}
vq_endchains(vq, 1); /* Generate interrupt if appropriate. */
free(buf);
}
static void
pci_vtscsi_eventq_notify(void *vsc, struct vqueue_info *vq)
{
vq_kick_disable(vq);
}
static void
pci_vtscsi_requestq_notify(void *vsc, struct vqueue_info *vq)
{
struct pci_vtscsi_softc *sc;
struct pci_vtscsi_queue *q;
struct pci_vtscsi_request *req;
struct iovec iov[VTSCSI_MAXSEG];
uint16_t flags[VTSCSI_MAXSEG];
uint16_t idx, n, i;
int readable;
sc = vsc;
q = &sc->vss_queues[vq->vq_num - 2];
while (vq_has_descs(vq)) {
readable = 0;
n = vq_getchain(vq, &idx, iov, VTSCSI_MAXSEG, flags);
/* Count readable descriptors */
for (i = 0; i < n; i++) {
if (flags[i] & VRING_DESC_F_WRITE)
break;
readable++;
}
req = calloc(1, sizeof(struct pci_vtscsi_request));
req->vsr_idx = idx;
req->vsr_queue = q;
req->vsr_niov_in = readable;
req->vsr_niov_out = n - readable;
memcpy(req->vsr_iov_in, iov,
req->vsr_niov_in * sizeof(struct iovec));
memcpy(req->vsr_iov_out, iov + readable,
req->vsr_niov_out * sizeof(struct iovec));
pthread_mutex_lock(&q->vsq_mtx);
STAILQ_INSERT_TAIL(&q->vsq_requests, req, vsr_link);
pthread_cond_signal(&q->vsq_cv);
pthread_mutex_unlock(&q->vsq_mtx);
DPRINTF(("virtio-scsi: request <idx=%d> enqueued", idx));
}
}
static int
pci_vtscsi_init_queue(struct pci_vtscsi_softc *sc,
struct pci_vtscsi_queue *queue, int num)
{
struct pci_vtscsi_worker *worker;
char tname[MAXCOMLEN + 1];
int i;
queue->vsq_sc = sc;
queue->vsq_vq = &sc->vss_vq[num + 2];
pthread_mutex_init(&queue->vsq_mtx, NULL);
pthread_mutex_init(&queue->vsq_qmtx, NULL);
pthread_cond_init(&queue->vsq_cv, NULL);
STAILQ_INIT(&queue->vsq_requests);
LIST_INIT(&queue->vsq_workers);
for (i = 0; i < VTSCSI_THR_PER_Q; i++) {
worker = calloc(1, sizeof(struct pci_vtscsi_worker));
worker->vsw_queue = queue;
pthread_create(&worker->vsw_thread, NULL, &pci_vtscsi_proc,
(void *)worker);
snprintf(tname, sizeof(tname), "vtscsi:%d-%d", num, i);
pthread_set_name_np(worker->vsw_thread, tname);
LIST_INSERT_HEAD(&queue->vsq_workers, worker, vsw_link);
}
return (0);
}
static int
pci_vtscsi_init(struct vmctx *ctx, struct mmio_devinst *pi, char *opts)
{
struct pci_vtscsi_softc *sc;
char *opt, *optname;
const char *devname;
int i, optidx = 0;
sc = calloc(1, sizeof(struct pci_vtscsi_softc));
devname = "/dev/cam/ctl";
while ((opt = strsep(&opts, ",")) != NULL) {
optname = strsep(&opt, "=");
if (opt == NULL && optidx == 0) {
if (optname[0] != 0)
devname = optname;
} else if (strcmp(optname, "dev") == 0 && opt != NULL) {
devname = opt;
} else if (strcmp(optname, "iid") == 0 && opt != NULL) {
sc->vss_iid = strtoul(opt, NULL, 10);
} else {
EPRINTLN("Invalid option %s", optname);
free(sc);
return (1);
}
optidx++;
}
sc->vss_ctl_fd = open(devname, O_RDWR);
if (sc->vss_ctl_fd < 0) {
WPRINTF(("cannot open %s: %s", devname, strerror(errno)));
free(sc);
return (1);
}
vi_softc_linkup(&sc->vss_vs, &vtscsi_vi_consts, sc, pi, sc->vss_vq);
sc->vss_vs.vs_mtx = &sc->vss_mtx;
/* controlq */
sc->vss_vq[0].vq_qsize = VTSCSI_RINGSZ;
sc->vss_vq[0].vq_notify = pci_vtscsi_controlq_notify;
/* eventq */
sc->vss_vq[1].vq_qsize = VTSCSI_RINGSZ;
sc->vss_vq[1].vq_notify = pci_vtscsi_eventq_notify;
/* request queues */
for (i = 2; i < VTSCSI_MAXQ; i++) {
sc->vss_vq[i].vq_qsize = VTSCSI_RINGSZ;
sc->vss_vq[i].vq_notify = pci_vtscsi_requestq_notify;
pci_vtscsi_init_queue(sc, &sc->vss_queues[i - 2], i - 2);
}
/* initialize config space */
mmio_set_cfgreg16(pi, PCIR_DEVICE, VIRTIO_DEV_SCSI);
mmio_set_cfgreg16(pi, PCIR_VENDOR, VIRTIO_VENDOR);
mmio_set_cfgreg8(pi, PCIR_CLASS, PCIC_STORAGE);
mmio_set_cfgreg16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_SCSI);
mmio_set_cfgreg16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR);
if (vi_intr_init(&sc->vss_vs, 1, fbsdrun_virtio_msix()))
return (1);
vi_set_io_res(&sc->vss_vs, 0);
return (0);
}
struct mmio_devemu pci_de_vscsi = {
.de_emu = "virtio-scsi",
.de_init = pci_vtscsi_init,
.de_write = vi_mmio_write,
.de_read = vi_mmio_read
};
MMIO_EMUL_SET(pci_de_vscsi);