static void channel_rescan(void *data)
{
struct rescan_wrapper* rescan = (struct rescan_wrapper*)data;
struct Scsi_Host *host;
struct scsi_device *sdev = NULL;
MV_U16 target;
if (rescan->pAdapter->host[rescan->channelIndex] == NULL)
{
kfree(rescan);
return;
}
host = rescan->pAdapter->host[rescan->channelIndex]->scsihost;
down(&rescan->pAdapter->rescan_mutex);
if (atomic_read(&rescan->pAdapter->stopped) > 0)
{
up(&rescan->pAdapter->rescan_mutex);
kfree(rescan);
return;
}
mvLogMsg(MV_IAL_LOG_ID, MV_DEBUG, "[%d %d] channel_rescan(): "
"targets to add 0x%X, targets to remove 0x%X\n",
rescan->pAdapter->mvSataAdapter.adapterId,
rescan->channelIndex,
rescan->targetsToRemove,
rescan->targetsToAdd);
for (target = 0; (rescan->targetsToRemove != 0) && (target < host->max_id); target++)
{
if (rescan->targetsToRemove & (1 << target))
{
sdev = scsi_device_lookup(host, 0, target, 0);
if (sdev != NULL)
{
scsi_device_cancel(sdev, 0);
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
}
}
sdev = NULL;
for (target = 0; (rescan->targetsToAdd != 0) && (target < host->max_id); target++)
{
if (rescan->targetsToAdd & (1 << target))
{
sdev = scsi_add_device(host, 0, target, 0);
if (NULL == sdev)
{
mvLogMsg(MV_IAL_LOG_ID,
MV_DEBUG_ERROR,
"[%d %d %d] Error adding scsi device\n",
rescan->pAdapter->mvSataAdapter.adapterId,
rescan->channelIndex,
target);
}
}
}
up(&rescan->pAdapter->rescan_mutex);
kfree(rescan);
}
static void pvscsi_process_msg(const struct pvscsi_adapter *adapter,
const struct PVSCSIRingMsgDesc *e)
{
struct PVSCSIRingsState *s = adapter->rings_state;
struct Scsi_Host *host = adapter->host;
struct scsi_device *sdev;
printk(KERN_INFO "vmw_pvscsi: msg type: 0x%x - MSG RING: %u/%u (%u) \n",
e->type, s->msgProdIdx, s->msgConsIdx, s->msgNumEntriesLog2);
BUILD_BUG_ON(PVSCSI_MSG_LAST != 2);
if (e->type == PVSCSI_MSG_DEV_ADDED) {
struct PVSCSIMsgDescDevStatusChanged *desc;
desc = (struct PVSCSIMsgDescDevStatusChanged *)e;
printk(KERN_INFO
"vmw_pvscsi: msg: device added at scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
if (!scsi_host_get(host))
return;
sdev = scsi_device_lookup(host, desc->bus, desc->target,
desc->lun[1]);
if (sdev) {
printk(KERN_INFO "vmw_pvscsi: device already exists\n");
scsi_device_put(sdev);
} else
scsi_add_device(adapter->host, desc->bus,
desc->target, desc->lun[1]);
scsi_host_put(host);
} else if (e->type == PVSCSI_MSG_DEV_REMOVED) {
struct PVSCSIMsgDescDevStatusChanged *desc;
desc = (struct PVSCSIMsgDescDevStatusChanged *)e;
printk(KERN_INFO
"vmw_pvscsi: msg: device removed at scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
if (!scsi_host_get(host))
return;
sdev = scsi_device_lookup(host, desc->bus, desc->target,
desc->lun[1]);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
} else
printk(KERN_INFO
"vmw_pvscsi: failed to lookup scsi%u:%u:%u\n",
desc->bus, desc->target, desc->lun[1]);
scsi_host_put(host);
}
}
static void hba_proc_msg(struct mv_hba_msg *pmsg)
{
PHBA_Extension phba;
struct scsi_device *psdev;
/* we don't do things without pmsg->data */
if (NULL == pmsg->data)
return;
phba = (PHBA_Extension) pmsg->data;
MV_DBG(DMSG_HBA, "__MV__ In hba_proc_msg.\n");
MV_ASSERT(pmsg);
switch (pmsg->msg) {
case EVENT_DEVICE_ARRIVAL:
if (scsi_add_device(phba->host, 0, pmsg->param, 0))
MV_DBG(DMSG_SCSI,
"__MV__ add scsi disk %d-%d-%d failed.\n",
0, pmsg->param, 0);
else
MV_DBG(DMSG_SCSI,
"__MV__ add scsi disk %d-%d-%d.\n",
0, pmsg->param, 0);
break;
case EVENT_DEVICE_REMOVAL:
psdev = scsi_device_lookup(phba->host, 0, pmsg->param, 0);
if (NULL != psdev) {
MV_DBG(DMSG_SCSI,
"__MV__ remove scsi disk %d-%d-%d.\n",
0, pmsg->param, 0);
scsi_remove_device(psdev);
scsi_device_put(psdev);
} else {
MV_DBG(DMSG_SCSI,
"__MV__ no disk to remove %d-%d-%d\n",
0, pmsg->param, 0);
}
break;
case EVENT_HOT_PLUG:
sata_hotplug(pmsg->data, pmsg->param);
break;
default:
break;
}
}
void scsi_scan_host(struct Scsi_Host *host)
{
struct scsi_cmnd *cmnd;
struct scsi_device *sdev;
struct scsi_target *target;
struct completion compl;
void *result;
init_completion(&compl);
sdev = (struct scsi_device *)kmalloc(sizeof(struct scsi_device), GFP_KERNEL);
target = (struct scsi_target *)kmalloc(sizeof(struct scsi_target), GFP_KERNEL);
cmnd = _scsi_alloc_command();
/* init device */
sdev->sdev_target = target;
sdev->host = host;
sdev->id = 0;
sdev->lun = 0;
host->hostt->slave_alloc(sdev);
host->hostt->slave_configure(sdev);
/* inquiry (36 bytes for usb) */
scsi_alloc_buffer(sdev->inquiry_len, cmnd);
cmnd->cmnd[0] = INQUIRY;
cmnd->cmnd[4] = sdev->inquiry_len;
cmnd->device = sdev;
cmnd->cmd_len = 6;
cmnd->sc_data_direction = DMA_FROM_DEVICE;
cmnd->back = &compl;
cmnd->scsi_done = inquiry_done;
host->hostt->queuecommand(host, cmnd);
wait_for_completion(&compl);
/* if PQ and PDT are zero we have a direct access block device conntected */
result = scsi_buffer_data(cmnd);
if (!((char*)result)[0])
scsi_add_device(sdev);
else {
kfree(sdev);
kfree(target);
}
scsi_free_buffer(cmnd);
_scsi_free_command(cmnd);
}
static int tcm_loop_port_link(
struct se_portal_group *se_tpg,
struct se_lun *lun)
{
struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
struct tcm_loop_tpg, tl_se_tpg);
struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
atomic_inc_mb(&tl_tpg->tl_tpg_port_count);
/*
* Add Linux/SCSI struct scsi_device by HCTL
*/
scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun);
pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n");
return 0;
}
static void scsifront_free(struct vscsifrnt_info *info)
{
struct Scsi_Host *host = info->host;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
if (host->shost_state != SHOST_DEL) {
#else
if (!test_bit(SHOST_DEL, &host->shost_state)) {
#endif
scsi_remove_host(info->host);
}
if (info->ring_ref != GRANT_INVALID_REF) {
gnttab_end_foreign_access(info->ring_ref,
(unsigned long)info->ring.sring);
info->ring_ref = GRANT_INVALID_REF;
info->ring.sring = NULL;
}
if (info->irq)
unbind_from_irqhandler(info->irq, info);
info->irq = 0;
scsi_host_put(info->host);
}
static int scsifront_alloc_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct vscsiif_sring *sring;
int err = -ENOMEM;
info->ring_ref = GRANT_INVALID_REF;
/***** Frontend to Backend ring start *****/
sring = (struct vscsiif_sring *) __get_free_page(GFP_KERNEL);
if (!sring) {
xenbus_dev_fatal(dev, err, "fail to allocate shared ring (Front to Back)");
return err;
}
SHARED_RING_INIT(sring);
FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE);
err = xenbus_grant_ring(dev, virt_to_mfn(sring));
if (err < 0) {
free_page((unsigned long) sring);
info->ring.sring = NULL;
xenbus_dev_fatal(dev, err, "fail to grant shared ring (Front to Back)");
goto free_sring;
}
info->ring_ref = err;
err = bind_listening_port_to_irqhandler(
dev->otherend_id, scsifront_intr,
SA_SAMPLE_RANDOM, "scsifront", info);
if (err <= 0) {
xenbus_dev_fatal(dev, err, "bind_listening_port_to_irqhandler");
goto free_sring;
}
info->irq = err;
return 0;
/* free resource */
free_sring:
scsifront_free(info);
return err;
}
static int scsifront_init_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct xenbus_transaction xbt;
int err;
DPRINTK("%s\n",__FUNCTION__);
err = scsifront_alloc_ring(info);
if (err)
return err;
DPRINTK("%u %u\n", info->ring_ref, info->evtchn);
again:
err = xenbus_transaction_start(&xbt);
if (err) {
xenbus_dev_fatal(dev, err, "starting transaction");
}
err = xenbus_printf(xbt, dev->nodename, "ring-ref", "%u",
info->ring_ref);
if (err) {
xenbus_dev_fatal(dev, err, "%s", "writing ring-ref");
goto fail;
}
err = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
irq_to_evtchn_port(info->irq));
if (err) {
xenbus_dev_fatal(dev, err, "%s", "writing event-channel");
goto fail;
}
err = xenbus_transaction_end(xbt, 0);
if (err) {
if (err == -EAGAIN)
goto again;
xenbus_dev_fatal(dev, err, "completing transaction");
goto free_sring;
}
return 0;
fail:
xenbus_transaction_end(xbt, 1);
free_sring:
/* free resource */
scsifront_free(info);
return err;
}
static int scsifront_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
struct vscsifrnt_info *info;
struct Scsi_Host *host;
int i, err = -ENOMEM;
char name[DEFAULT_TASK_COMM_LEN];
host = scsi_host_alloc(&scsifront_sht, sizeof(*info));
if (!host) {
xenbus_dev_fatal(dev, err, "fail to allocate scsi host");
return err;
}
info = (struct vscsifrnt_info *) host->hostdata;
info->host = host;
dev->dev.driver_data = info;
info->dev = dev;
for (i = 0; i < VSCSIIF_MAX_REQS; i++) {
info->shadow[i].next_free = i + 1;
init_waitqueue_head(&(info->shadow[i].wq_reset));
info->shadow[i].wait_reset = 0;
}
info->shadow[VSCSIIF_MAX_REQS - 1].next_free = 0x0fff;
err = scsifront_init_ring(info);
if (err) {
scsi_host_put(host);
return err;
}
init_waitqueue_head(&info->wq);
spin_lock_init(&info->io_lock);
spin_lock_init(&info->shadow_lock);
snprintf(name, DEFAULT_TASK_COMM_LEN, "vscsiif.%d", info->host->host_no);
info->kthread = kthread_run(scsifront_schedule, info, name);
if (IS_ERR(info->kthread)) {
err = PTR_ERR(info->kthread);
info->kthread = NULL;
printk(KERN_ERR "scsifront: kthread start err %d\n", err);
goto free_sring;
}
host->max_id = VSCSIIF_MAX_TARGET;
host->max_channel = 0;
host->max_lun = VSCSIIF_MAX_LUN;
host->max_sectors = (VSCSIIF_SG_TABLESIZE - 1) * PAGE_SIZE / 512;
err = scsi_add_host(host, &dev->dev);
if (err) {
printk(KERN_ERR "scsifront: fail to add scsi host %d\n", err);
goto free_sring;
}
xenbus_switch_state(dev, XenbusStateInitialised);
return 0;
free_sring:
/* free resource */
scsifront_free(info);
return err;
}
static int scsifront_remove(struct xenbus_device *dev)
{
struct vscsifrnt_info *info = dev->dev.driver_data;
DPRINTK("%s: %s removed\n",__FUNCTION__ ,dev->nodename);
if (info->kthread) {
kthread_stop(info->kthread);
info->kthread = NULL;
}
scsifront_free(info);
return 0;
}
static int scsifront_disconnect(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct Scsi_Host *host = info->host;
DPRINTK("%s: %s disconnect\n",__FUNCTION__ ,dev->nodename);
/*
When this function is executed, all devices of
Frontend have been deleted.
Therefore, it need not block I/O before remove_host.
*/
scsi_remove_host(host);
xenbus_frontend_closed(dev);
return 0;
}
#define VSCSIFRONT_OP_ADD_LUN 1
#define VSCSIFRONT_OP_DEL_LUN 2
static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
{
struct xenbus_device *dev = info->dev;
int i, err = 0;
char str[64], state_str[64];
char **dir;
unsigned int dir_n = 0;
unsigned int device_state;
unsigned int hst, chn, tgt, lun;
struct scsi_device *sdev;
dir = xenbus_directory(XBT_NIL, dev->otherend, "vscsi-devs", &dir_n);
if (IS_ERR(dir))
return;
for (i = 0; i < dir_n; i++) {
/* read status */
snprintf(str, sizeof(str), "vscsi-devs/%s/state", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str, "%u",
&device_state);
if (XENBUS_EXIST_ERR(err))
continue;
/* virtual SCSI device */
snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str,
"%u:%u:%u:%u", &hst, &chn, &tgt, &lun);
if (XENBUS_EXIST_ERR(err))
continue;
/* front device state path */
snprintf(state_str, sizeof(state_str), "vscsi-devs/%s/state", dir[i]);
switch (op) {
case VSCSIFRONT_OP_ADD_LUN:
if (device_state == XenbusStateInitialised) {
sdev = scsi_device_lookup(info->host, chn, tgt, lun);
if (sdev) {
printk(KERN_ERR "scsifront: Device already in use.\n");
scsi_device_put(sdev);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateClosed);
} else {
scsi_add_device(info->host, chn, tgt, lun);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateConnected);
}
}
break;
case VSCSIFRONT_OP_DEL_LUN:
if (device_state == XenbusStateClosing) {
sdev = scsi_device_lookup(info->host, chn, tgt, lun);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
xenbus_printf(XBT_NIL, dev->nodename,
state_str, "%d", XenbusStateClosed);
}
}
break;
default:
break;
}
}
kfree(dir);
return;
}
static void scsifront_backend_changed(struct xenbus_device *dev,
enum xenbus_state backend_state)
{
struct vscsifrnt_info *info = dev->dev.driver_data;
DPRINTK("%p %u %u\n", dev, dev->state, backend_state);
switch (backend_state) {
case XenbusStateUnknown:
case XenbusStateInitialising:
case XenbusStateInitWait:
case XenbusStateClosed:
break;
case XenbusStateInitialised:
break;
case XenbusStateConnected:
if (xenbus_read_driver_state(dev->nodename) ==
XenbusStateInitialised) {
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
}
if (dev->state == XenbusStateConnected)
break;
xenbus_switch_state(dev, XenbusStateConnected);
break;
case XenbusStateClosing:
scsifront_disconnect(info);
break;
case XenbusStateReconfiguring:
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_DEL_LUN);
xenbus_switch_state(dev, XenbusStateReconfiguring);
break;
case XenbusStateReconfigured:
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
xenbus_switch_state(dev, XenbusStateConnected);
break;
}
}
static struct xenbus_device_id scsifront_ids[] = {
{ "vscsi" },
{ "" }
};
MODULE_ALIAS("xen:vscsi");
static struct xenbus_driver scsifront_driver = {
.name = "vscsi",
.owner = THIS_MODULE,
.ids = scsifront_ids,
.probe = scsifront_probe,
.remove = scsifront_remove,
/* .resume = scsifront_resume, */
.otherend_changed = scsifront_backend_changed,
};
int scsifront_xenbus_init(void)
{
return xenbus_register_frontend(&scsifront_driver);
}
void scsifront_xenbus_unregister(void)
{
xenbus_unregister_driver(&scsifront_driver);
}
static int
adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
struct cciss_scsi_dev_t sd[], int nsds)
{
/* sd contains scsi3 addresses and devtypes, but
bus target and lun are not filled in. This funciton
takes what's in sd to be the current and adjusts
ccissscsi[] to be in line with what's in sd. */
int i,j, found, changes=0;
struct cciss_scsi_dev_t *csd;
unsigned long flags;
struct scsi2map *added, *removed;
int nadded, nremoved;
struct Scsi_Host *sh = NULL;
added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
GFP_KERNEL);
removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
GFP_KERNEL);
if (!added || !removed) {
dev_warn(&h->pdev->dev,
"Out of memory in adjust_cciss_scsi_table\n");
goto free_and_out;
}
CPQ_TAPE_LOCK(h, flags);
if (hostno != -1) /* if it's not the first time... */
sh = h->scsi_ctlr->scsi_host;
/* find any devices in ccissscsi[] that are not in
sd[] and remove them from ccissscsi[] */
i = 0;
nremoved = 0;
nadded = 0;
while (i < ccissscsi[h->ctlr].ndevices) {
csd = &ccissscsi[h->ctlr].dev[i];
found=0;
for (j=0;j<nsds;j++) {
if (SCSI3ADDR_EQ(sd[j].scsi3addr,
csd->scsi3addr)) {
if (device_is_the_same(&sd[j], csd))
found=2;
else
found=1;
break;
}
}
if (found == 0) { /* device no longer present. */
changes++;
cciss_scsi_remove_entry(h, hostno, i,
removed, &nremoved);
/* remove ^^^, hence i not incremented */
} else if (found == 1) { /* device is different in some way */
changes++;
dev_info(&h->pdev->dev,
"device c%db%dt%dl%d has changed.\n",
hostno, csd->bus, csd->target, csd->lun);
cciss_scsi_remove_entry(h, hostno, i,
removed, &nremoved);
/* remove ^^^, hence i not incremented */
if (cciss_scsi_add_entry(h, hostno, &sd[j],
added, &nadded) != 0)
/* we just removed one, so add can't fail. */
BUG();
csd->devtype = sd[j].devtype;
memcpy(csd->device_id, sd[j].device_id,
sizeof(csd->device_id));
memcpy(csd->vendor, sd[j].vendor,
sizeof(csd->vendor));
memcpy(csd->model, sd[j].model,
sizeof(csd->model));
memcpy(csd->revision, sd[j].revision,
sizeof(csd->revision));
} else /* device is same as it ever was, */
i++; /* so just move along. */
}
/* Now, make sure every device listed in sd[] is also
listed in ccissscsi[], adding them if they aren't found */
for (i=0;i<nsds;i++) {
found=0;
for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
csd = &ccissscsi[h->ctlr].dev[j];
if (SCSI3ADDR_EQ(sd[i].scsi3addr,
csd->scsi3addr)) {
if (device_is_the_same(&sd[i], csd))
found=2; /* found device */
else
found=1; /* found a bug. */
break;
}
}
if (!found) {
changes++;
if (cciss_scsi_add_entry(h, hostno, &sd[i],
added, &nadded) != 0)
break;
} else if (found == 1) {
/* should never happen... */
changes++;
dev_warn(&h->pdev->dev,
"device unexpectedly changed\n");
/* but if it does happen, we just ignore that device */
}
}
CPQ_TAPE_UNLOCK(h, flags);
/* Don't notify scsi mid layer of any changes the first time through */
/* (or if there are no changes) scsi_scan_host will do it later the */
/* first time through. */
if (hostno == -1 || !changes)
goto free_and_out;
/* Notify scsi mid layer of any removed devices */
for (i = 0; i < nremoved; i++) {
struct scsi_device *sdev =
scsi_device_lookup(sh, removed[i].bus,
removed[i].target, removed[i].lun);
if (sdev != NULL) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
} else {
/* We don't expect to get here. */
/* future cmds to this device will get selection */
/* timeout as if the device was gone. */
dev_warn(&h->pdev->dev, "didn't find "
"c%db%dt%dl%d\n for removal.",
hostno, removed[i].bus,
removed[i].target, removed[i].lun);
}
}
/* Notify scsi mid layer of any added devices */
for (i = 0; i < nadded; i++) {
int rc;
rc = scsi_add_device(sh, added[i].bus,
added[i].target, added[i].lun);
if (rc == 0)
continue;
dev_warn(&h->pdev->dev, "scsi_add_device "
"c%db%dt%dl%d failed, device not added.\n",
hostno, added[i].bus, added[i].target, added[i].lun);
/* now we have to remove it from ccissscsi, */
/* since it didn't get added to scsi mid layer */
fixup_botched_add(h, added[i].scsi3addr);
}
free_and_out:
kfree(added);
kfree(removed);
return 0;
}