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 struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
{
struct ide_scsi_obj *scsi = NULL;
mutex_lock(&idescsi_ref_mutex);
scsi = ide_scsi_g(disk);
if (scsi)
scsi_host_get(scsi->host);
mutex_unlock(&idescsi_ref_mutex);
return scsi;
}
static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
{
struct ide_scsi_obj *scsi = NULL;
mutex_lock(&idescsi_ref_mutex);
scsi = ide_scsi_g(disk);
if (scsi) {
if (ide_device_get(scsi->drive))
scsi = NULL;
else
scsi_host_get(scsi->host);
}
mutex_unlock(&idescsi_ref_mutex);
return scsi;
}
static int rtsx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
struct Scsi_Host *host;
struct rtsx_dev *dev;
int err = 0;
struct task_struct *th;
printk(KERN_INFO "--- %s ---\n", DRIVER_MAKE_TIME);
err = pci_enable_device(pci);
if (err < 0) {
printk(KERN_ERR "PCI enable device failed!\n");
return err;
}
err = pci_request_regions(pci, CR_DRIVER_NAME);
if (err < 0) {
printk(KERN_ERR "PCI request regions for %s failed!\n", CR_DRIVER_NAME);
pci_disable_device(pci);
return err;
}
/*
* Ask the SCSI layer to allocate a host structure, with extra
* space at the end for our private rtsx_dev structure.
*/
host = scsi_host_alloc(&rtsx_host_template, sizeof(*dev));
if (!host) {
printk(KERN_ERR "Unable to allocate the scsi host\n");
pci_release_regions(pci);
pci_disable_device(pci);
return -ENOMEM;
}
dev = host_to_rtsx(host);
memset(dev, 0, sizeof(struct rtsx_dev));
dev->chip = (struct rtsx_chip *)kmalloc(sizeof(struct rtsx_chip), GFP_KERNEL);
if (dev->chip == NULL) {
goto errout;
}
memset(dev->chip, 0, sizeof(struct rtsx_chip));
spin_lock_init(&dev->reg_lock);
mutex_init(&(dev->dev_mutex));
sema_init(&(dev->sema), 0);
init_completion(&(dev->notify));
init_waitqueue_head(&dev->delay_wait);
dev->pci = pci;
dev->irq = -1;
printk(KERN_INFO "Resource length: 0x%x\n", (unsigned int)pci_resource_len(pci,0));
dev->addr = pci_resource_start(pci, 0);
dev->remap_addr = ioremap_nocache(dev->addr, pci_resource_len(pci,0));
if (dev->remap_addr == NULL) {
printk(KERN_ERR "ioremap error\n");
err = -ENXIO;
goto errout;
}
printk(KERN_INFO "Original address: 0x%lx, remapped address: 0x%lx\n",
(unsigned long)(dev->addr), (unsigned long)(dev->remap_addr));
dev->rtsx_resv_buf = dma_alloc_coherent(&(pci->dev), RTSX_RESV_BUF_LEN,
&(dev->rtsx_resv_buf_addr), GFP_KERNEL);
if (dev->rtsx_resv_buf == NULL) {
printk(KERN_ERR "alloc dma buffer fail\n");
err = -ENXIO;
goto errout;
}
dev->chip->host_cmds_ptr = dev->rtsx_resv_buf;
dev->chip->host_cmds_addr = dev->rtsx_resv_buf_addr;
dev->chip->host_sg_tbl_ptr = dev->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
dev->chip->host_sg_tbl_addr = dev->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
dev->chip->rtsx = dev;
rtsx_init_options(dev->chip);
printk(KERN_INFO "pci->irq = %d\n", pci->irq);
if (dev->chip->msi_en) {
if (pci_enable_msi(pci) < 0) {
dev->chip->msi_en = 0;
}
}
if (rtsx_acquire_irq(dev) < 0) {
err = -EBUSY;
goto errout;
}
pci_set_master(pci);
synchronize_irq(dev->irq);
err = scsi_add_host(host, &pci->dev);
if (err) {
printk(KERN_ERR "Unable to add the scsi host\n");
goto errout;
}
rtsx_init_chip(dev->chip);
th = kthread_create(rtsx_control_thread, dev, CR_DRIVER_NAME);
if (IS_ERR(th)) {
printk(KERN_ERR "Unable to start control thread\n");
err = PTR_ERR(th);
goto errout;
}
/* Take a reference to the host for the control thread and
* count it among all the threads we have launched. Then
* start it up. */
scsi_host_get(rtsx_to_host(dev));
atomic_inc(&total_threads);
wake_up_process(th);
th = kthread_create(rtsx_scan_thread, dev, "rtsx-scan");
if (IS_ERR(th)) {
printk(KERN_ERR "Unable to start the device-scanning thread\n");
quiesce_and_remove_host(dev);
err = PTR_ERR(th);
goto errout;
}
/* Take a reference to the host for the scanning thread and
* count it among all the threads we have launched. Then
* start it up. */
scsi_host_get(rtsx_to_host(dev));
atomic_inc(&total_threads);
wake_up_process(th);
th = kthread_create(rtsx_polling_thread, dev, "rtsx-polling");
if (IS_ERR(th)) {
printk(KERN_ERR "Unable to start the device-polling thread\n");
quiesce_and_remove_host(dev);
err = PTR_ERR(th);
goto errout;
}
/* Take a reference to the host for the polling thread and
* count it among all the threads we have launched. Then
* start it up. */
scsi_host_get(rtsx_to_host(dev));
atomic_inc(&total_threads);
wake_up_process(th);
pci_set_drvdata(pci, dev);
return 0;
errout:
printk(KERN_ERR "rtsx_probe() failed\n");
release_everything(dev);
return err;
}