/**
* mei_remove - Device Removal Routine
*
* @pdev: PCI device structure
*
* mei_remove is called by the PCI subsystem to alert the driver
* that it should release a PCI device.
*/
static void mei_txe_remove(struct pci_dev *pdev)
{
struct mei_device *dev;
struct mei_txe_hw *hw;
dev = pci_get_drvdata(pdev);
if (!dev) {
dev_err(&pdev->dev, "mei: dev =NULL\n");
return;
}
pm_runtime_get_noresume(&pdev->dev);
hw = to_txe_hw(dev);
mei_stop(dev);
if (!pci_dev_run_wake(pdev))
mei_txe_unset_pm_domain(dev);
/* disable interrupts */
mei_disable_interrupts(dev);
free_irq(pdev->irq, dev);
pci_disable_msi(pdev);
mei_mm_deinit(hw->mdev);
if (hw->pool_release)
hw->pool_release(hw);
pci_set_drvdata(pdev, NULL);
mei_txe_pci_iounmap(pdev, hw);
mei_deregister(dev);
kfree(dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
/**
* mei_txe_probe - Device Initialization Routine
*
* @pdev: PCI device structure
* @ent: entry in mei_txe_pci_tbl
*
* Return: 0 on success, <0 on failure.
*/
static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct mei_device *dev;
struct mei_txe_hw *hw;
int err;
int i;
/* enable pci dev */
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "failed to enable pci device.\n");
goto end;
}
/* set PCI host mastering */
pci_set_master(pdev);
/* pci request regions for mei driver */
err = pci_request_regions(pdev, KBUILD_MODNAME);
if (err) {
dev_err(&pdev->dev, "failed to get pci regions.\n");
goto disable_device;
}
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
if (err) {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "No suitable DMA available.\n");
goto release_regions;
}
}
/* allocates and initializes the mei dev structure */
dev = mei_txe_dev_init(pdev);
if (!dev) {
err = -ENOMEM;
goto release_regions;
}
hw = to_txe_hw(dev);
/* mapping IO device memory */
for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) {
hw->mem_addr[i] = pci_iomap(pdev, i, 0);
if (!hw->mem_addr[i]) {
dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
err = -ENOMEM;
goto free_device;
}
}
pci_enable_msi(pdev);
/* clear spurious interrupts */
mei_clear_interrupts(dev);
/* request and enable interrupt */
if (pci_dev_msi_enabled(pdev))
err = request_threaded_irq(pdev->irq,
NULL,
mei_txe_irq_thread_handler,
IRQF_ONESHOT, KBUILD_MODNAME, dev);
else
err = request_threaded_irq(pdev->irq,
mei_txe_irq_quick_handler,
mei_txe_irq_thread_handler,
IRQF_SHARED, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "mei: request_threaded_irq failure. irq = %d\n",
pdev->irq);
goto free_device;
}
if (mei_start(dev)) {
dev_err(&pdev->dev, "init hw failure.\n");
err = -ENODEV;
goto release_irq;
}
pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_TXI_RPM_TIMEOUT);
pm_runtime_use_autosuspend(&pdev->dev);
err = mei_register(dev, &pdev->dev);
if (err)
goto stop;
pci_set_drvdata(pdev, dev);
/*
* For not wake-able HW runtime pm framework
* can't be used on pci device level.
* Use domain runtime pm callbacks instead.
*/
if (!pci_dev_run_wake(pdev))
mei_txe_set_pm_domain(dev);
pm_runtime_put_noidle(&pdev->dev);
return 0;
stop:
mei_stop(dev);
release_irq:
mei_cancel_work(dev);
/* disable interrupts */
mei_disable_interrupts(dev);
free_irq(pdev->irq, dev);
pci_disable_msi(pdev);
free_device:
mei_txe_pci_iounmap(pdev, hw);
kfree(dev);
release_regions:
pci_release_regions(pdev);
disable_device:
pci_disable_device(pdev);
end:
dev_err(&pdev->dev, "initialization failed.\n");
return err;
}
