/* This is always called with scsi_lock(host) held */
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
/* check for state-transition errors */
if (chip->srb) {
dev_err(&dev->pci->dev, "Error: chip->srb = %p\n",
chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
/* fail the command if we are disconnecting */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
dev_info(&dev->pci->dev, "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
/* enqueue the command and wake up the control thread */
srb->scsi_done = done;
chip->srb = srb;
complete(&dev->cmnd_ready);
return 0;
}
/* Command timeout and abort */
static int command_abort(struct scsi_cmnd *srb)
{
struct Scsi_Host *host = srb->device->host;
struct rtsx_dev *dev = host_to_rtsx(host);
struct rtsx_chip *chip = dev->chip;
dev_info(&dev->pci->dev, "%s called\n", __func__);
scsi_lock(host);
/* Is this command still active? */
if (chip->srb != srb) {
scsi_unlock(host);
dev_info(&dev->pci->dev, "-- nothing to abort\n");
return FAILED;
}
rtsx_set_stat(chip, RTSX_STAT_ABORT);
scsi_unlock(host);
/* Wait for the aborted command to finish */
wait_for_completion(&dev->notify);
return SUCCESS;
}
static int command_abort(struct scsi_cmnd *srb)
{
struct Scsi_Host *host = srb->device->host;
struct rtsx_dev *dev = host_to_rtsx(host);
struct rtsx_chip *chip = dev->chip;
printk(KERN_INFO "%s called\n", __FUNCTION__);
scsi_lock(host);
if (chip->srb != srb) {
scsi_unlock(host);
printk(KERN_INFO "-- nothing to abort\n");
return FAILED;
}
rtsx_set_stat(chip, RTSX_STAT_ABORT);
scsi_unlock(host);
wait_for_completion(&dev->notify);
return SUCCESS;
}
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
if (chip->srb != NULL) {
printk(KERN_ERR "Error in %s: chip->srb = %p\n",
__FUNCTION__, chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
srb->scsi_done = done;
chip->srb = srb;
up(&(dev->sema));
return 0;
}
/* This is always called with scsi_lock(host) held */
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
/* check for state-transition errors */
if (chip->srb != NULL) {
printk(KERN_ERR "Error in %s: chip->srb = %p\n",
__func__, chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
/* fail the command if we are disconnecting */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
/* enqueue the command and wake up the control thread */
srb->scsi_done = done;
chip->srb = srb;
up(&(dev->sema));
return 0;
}
/*
* This invokes the transport reset mechanism to reset the state of the
* device
*/
static int device_reset(struct scsi_cmnd *srb)
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
dev_info(&dev->pci->dev, "%s called\n", __func__);
return SUCCESS;
}
/* Simulate a SCSI bus reset by resetting the device's USB port. */
static int bus_reset(struct scsi_cmnd *srb)
{
int result = 0;
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
dev_info(&dev->pci->dev, "%s called\n", __func__);
return result < 0 ? FAILED : SUCCESS;
}
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;
dev_dbg(&pci->dev, "Realtek PCI-E card reader detected\n");
err = pcim_enable_device(pci);
if (err < 0) {
dev_err(&pci->dev, "PCI enable device failed!\n");
return err;
}
err = pci_request_regions(pci, CR_DRIVER_NAME);
if (err < 0) {
dev_err(&pci->dev, "PCI request regions for %s failed!\n",
CR_DRIVER_NAME);
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) {
dev_err(&pci->dev, "Unable to allocate the scsi host\n");
return -ENOMEM;
}
dev = host_to_rtsx(host);
memset(dev, 0, sizeof(struct rtsx_dev));
dev->chip = kzalloc(sizeof(struct rtsx_chip), GFP_KERNEL);
if (!dev->chip) {
err = -ENOMEM;
goto errout;
}
spin_lock_init(&dev->reg_lock);
mutex_init(&(dev->dev_mutex));
init_completion(&dev->cmnd_ready);
init_completion(&dev->control_exit);
init_completion(&dev->polling_exit);
init_completion(&(dev->notify));
init_completion(&dev->scanning_done);
init_waitqueue_head(&dev->delay_wait);
dev->pci = pci;
dev->irq = -1;
dev_info(&pci->dev, "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) {
dev_err(&pci->dev, "ioremap error\n");
err = -ENXIO;
goto errout;
}
/*
* Using "unsigned long" cast here to eliminate gcc warning in
* 64-bit system
*/
dev_info(&pci->dev, "Original address: 0x%lx, remapped address: 0x%lx\n",
(unsigned long)(dev->addr), (unsigned long)(dev->remap_addr));
dev->rtsx_resv_buf = dmam_alloc_coherent(&pci->dev, RTSX_RESV_BUF_LEN,
&dev->rtsx_resv_buf_addr, GFP_KERNEL);
if (!dev->rtsx_resv_buf) {
dev_err(&pci->dev, "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);
dev_info(&pci->dev, "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);
rtsx_init_chip(dev->chip);
/*
* set the supported max_lun and max_id for the scsi host
* NOTE: the minimal value of max_id is 1
*/
host->max_id = 1;
host->max_lun = dev->chip->max_lun;
/* Start up our control thread */
th = kthread_run(rtsx_control_thread, dev, CR_DRIVER_NAME);
if (IS_ERR(th)) {
dev_err(&pci->dev, "Unable to start control thread\n");
err = PTR_ERR(th);
goto errout;
}
dev->ctl_thread = th;
err = scsi_add_host(host, &pci->dev);
if (err) {
dev_err(&pci->dev, "Unable to add the scsi host\n");
goto errout;
}
/* Start up the thread for delayed SCSI-device scanning */
th = kthread_run(rtsx_scan_thread, dev, "rtsx-scan");
if (IS_ERR(th)) {
dev_err(&pci->dev, "Unable to start the device-scanning thread\n");
complete(&dev->scanning_done);
quiesce_and_remove_host(dev);
err = PTR_ERR(th);
goto errout;
}
/* Start up the thread for polling thread */
th = kthread_run(rtsx_polling_thread, dev, "rtsx-polling");
if (IS_ERR(th)) {
dev_err(&pci->dev, "Unable to start the device-polling thread\n");
quiesce_and_remove_host(dev);
err = PTR_ERR(th);
goto errout;
}
dev->polling_thread = th;
pci_set_drvdata(pci, dev);
return 0;
/* We come here if there are any problems */
errout:
dev_err(&pci->dev, "rtsx_probe() failed\n");
release_everything(dev);
return err;
}
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;
}