void aq_pci_func_free_irqs(struct aq_nic_s *self)
{
struct pci_dev *pdev = self->pdev;
unsigned int i;
for (i = 32U; i--;) {
if (!((1U << i) & self->msix_entry_mask))
continue;
if (pdev->msix_enabled)
irq_set_affinity_hint(pci_irq_vector(pdev, i), NULL);
free_irq(pci_irq_vector(pdev, i), self->aq_vec[i]);
self->msix_entry_mask &= ~(1U << i);
}
}
static int xgbe_config_irqs(struct xgbe_prv_data *pdata)
{
int ret;
ret = xgbe_config_multi_msi(pdata);
if (!ret)
goto out;
ret = pci_alloc_irq_vectors(pdata->pcidev, 1, 1,
PCI_IRQ_LEGACY | PCI_IRQ_MSI);
if (ret < 0) {
dev_info(pdata->dev, "single IRQ enablement failed\n");
return ret;
}
pdata->isr_as_tasklet = pdata->pcidev->msi_enabled ? 1 : 0;
pdata->irq_count = 1;
pdata->channel_irq_count = 1;
pdata->dev_irq = pci_irq_vector(pdata->pcidev, 0);
pdata->ecc_irq = pci_irq_vector(pdata->pcidev, 0);
pdata->i2c_irq = pci_irq_vector(pdata->pcidev, 0);
pdata->an_irq = pci_irq_vector(pdata->pcidev, 0);
if (netif_msg_probe(pdata))
dev_dbg(pdata->dev, "single %s interrupt enabled\n",
pdata->pcidev->msi_enabled ? "MSI" : "legacy");
out:
if (netif_msg_probe(pdata)) {
unsigned int i;
dev_dbg(pdata->dev, " dev irq=%d\n", pdata->dev_irq);
dev_dbg(pdata->dev, " ecc irq=%d\n", pdata->ecc_irq);
dev_dbg(pdata->dev, " i2c irq=%d\n", pdata->i2c_irq);
dev_dbg(pdata->dev, " an irq=%d\n", pdata->an_irq);
for (i = 0; i < pdata->channel_irq_count; i++)
dev_dbg(pdata->dev, " dma%u irq=%d\n",
i, pdata->channel_irq[i]);
}
return 0;
}
static int xgbe_config_multi_msi(struct xgbe_prv_data *pdata)
{
unsigned int vector_count;
unsigned int i, j;
int ret;
vector_count = XGBE_MSI_BASE_COUNT;
vector_count += max(pdata->rx_ring_count,
pdata->tx_ring_count);
ret = pci_alloc_irq_vectors(pdata->pcidev, XGBE_MSI_MIN_COUNT,
vector_count, PCI_IRQ_MSI | PCI_IRQ_MSIX);
if (ret < 0) {
dev_info(pdata->dev, "multi MSI/MSI-X enablement failed\n");
return ret;
}
pdata->isr_as_tasklet = 1;
pdata->irq_count = ret;
pdata->dev_irq = pci_irq_vector(pdata->pcidev, 0);
pdata->ecc_irq = pci_irq_vector(pdata->pcidev, 1);
pdata->i2c_irq = pci_irq_vector(pdata->pcidev, 2);
pdata->an_irq = pci_irq_vector(pdata->pcidev, 3);
for (i = XGBE_MSI_BASE_COUNT, j = 0; i < ret; i++, j++)
pdata->channel_irq[j] = pci_irq_vector(pdata->pcidev, i);
pdata->channel_irq_count = j;
pdata->per_channel_irq = 1;
pdata->channel_irq_mode = XGBE_IRQ_MODE_LEVEL;
if (netif_msg_probe(pdata))
dev_dbg(pdata->dev, "multi %s interrupts enabled\n",
pdata->pcidev->msix_enabled ? "MSI-X" : "MSI");
return 0;
}
int aq_pci_func_alloc_irq(struct aq_nic_s *self, unsigned int i,
char *name, void *aq_vec, cpumask_t *affinity_mask)
{
struct pci_dev *pdev = self->pdev;
int err;
if (pdev->msix_enabled || pdev->msi_enabled)
err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr, 0,
name, aq_vec);
else
err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr_legacy,
IRQF_SHARED, name, aq_vec);
if (err >= 0) {
self->msix_entry_mask |= (1 << i);
self->aq_vec[i] = aq_vec;
if (pdev->msix_enabled)
irq_set_affinity_hint(pci_irq_vector(pdev, i),
affinity_mask);
}
return err;
}
/**
* pci_request_irq - allocate an interrupt line for a PCI device
* @dev: PCI device to operate on
* @nr: device-relative interrupt vector index (0-based).
* @handler: Function to be called when the IRQ occurs.
* Primary handler for threaded interrupts.
* If NULL and thread_fn != NULL the default primary handler is
* installed.
* @thread_fn: Function called from the IRQ handler thread
* If NULL, no IRQ thread is created
* @dev_id: Cookie passed back to the handler function
* @fmt: Printf-like format string naming the handler
*
* This call allocates interrupt resources and enables the interrupt line and
* IRQ handling. From the point this call is made @handler and @thread_fn may
* be invoked. All interrupts requested using this function might be shared.
*
* @dev_id must not be NULL and must be globally unique.
*/
int pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler,
irq_handler_t thread_fn, void *dev_id, const char *fmt, ...)
{
va_list ap;
int ret;
char *devname;
va_start(ap, fmt);
devname = kvasprintf(GFP_KERNEL, fmt, ap);
va_end(ap);
ret = request_threaded_irq(pci_irq_vector(dev, nr), handler, thread_fn,
IRQF_SHARED, devname, dev_id);
if (ret)
kfree(devname);
return ret;
}
static int thunder_mmc_register_interrupts(struct cvm_mmc_host *host,
struct pci_dev *pdev)
{
int nvec, ret, i;
nvec = pci_alloc_irq_vectors(pdev, 1, 9, PCI_IRQ_MSIX);
if (nvec < 0)
return nvec;
/* register interrupts */
for (i = 0; i < nvec; i++) {
ret = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
cvm_mmc_interrupt,
0, cvm_mmc_irq_names[i], host);
if (ret)
return ret;
}
return 0;
}
static int intel_th_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct intel_th_drvdata *drvdata = (void *)id->driver_data;
struct resource resource[TH_MMIO_END + TH_NVEC_MAX] = {
[TH_MMIO_CONFIG] = pdev->resource[TH_PCI_CONFIG_BAR],
[TH_MMIO_SW] = pdev->resource[TH_PCI_STH_SW_BAR],
};
int err, r = TH_MMIO_SW + 1, i;
struct intel_th *th;
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
if (err)
return err;
if (pdev->resource[TH_PCI_RTIT_BAR].start) {
resource[TH_MMIO_RTIT] = pdev->resource[TH_PCI_RTIT_BAR];
r++;
}
err = pci_alloc_irq_vectors(pdev, 1, 8, PCI_IRQ_ALL_TYPES);
if (err > 0)
for (i = 0; i < err; i++, r++) {
resource[r].flags = IORESOURCE_IRQ;
resource[r].start = pci_irq_vector(pdev, i);
}
th = intel_th_alloc(&pdev->dev, drvdata, resource, r);
if (IS_ERR(th))
return PTR_ERR(th);
th->activate = intel_th_pci_activate;
th->deactivate = intel_th_pci_deactivate;
pci_set_master(pdev);
return 0;
}
/**
* pci_free_irq - free an interrupt allocated with pci_request_irq
* @dev: PCI device to operate on
* @nr: device-relative interrupt vector index (0-based).
* @dev_id: Device identity to free
*
* Remove an interrupt handler. The handler is removed and if the interrupt
* line is no longer in use by any driver it is disabled. The caller must
* ensure the interrupt is disabled on the device before calling this function.
* The function does not return until any executing interrupts for this IRQ
* have completed.
*
* This function must not be called from interrupt context.
*/
void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id)
{
kfree(free_irq(pci_irq_vector(dev, nr), dev_id));
}
static int
igbuio_pci_enable_interrupts(struct rte_uio_pci_dev *udev)
{
int err = 0;
#ifndef HAVE_ALLOC_IRQ_VECTORS
struct msix_entry msix_entry;
#endif
switch (igbuio_intr_mode_preferred) {
case RTE_INTR_MODE_MSIX:
/* Only 1 msi-x vector needed */
#ifndef HAVE_ALLOC_IRQ_VECTORS
msix_entry.entry = 0;
if (pci_enable_msix(udev->pdev, &msix_entry, 1) == 0) {
dev_dbg(&udev->pdev->dev, "using MSI-X");
udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = msix_entry.vector;
udev->mode = RTE_INTR_MODE_MSIX;
break;
}
#else
if (pci_alloc_irq_vectors(udev->pdev, 1, 1, PCI_IRQ_MSIX) == 1) {
dev_dbg(&udev->pdev->dev, "using MSI-X");
udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = pci_irq_vector(udev->pdev, 0);
udev->mode = RTE_INTR_MODE_MSIX;
break;
}
#endif
/* fall back to MSI */
case RTE_INTR_MODE_MSI:
#ifndef HAVE_ALLOC_IRQ_VECTORS
if (pci_enable_msi(udev->pdev) == 0) {
dev_dbg(&udev->pdev->dev, "using MSI");
udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = udev->pdev->irq;
udev->mode = RTE_INTR_MODE_MSI;
break;
}
#else
if (pci_alloc_irq_vectors(udev->pdev, 1, 1, PCI_IRQ_MSI) == 1) {
dev_dbg(&udev->pdev->dev, "using MSI");
udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = pci_irq_vector(udev->pdev, 0);
udev->mode = RTE_INTR_MODE_MSI;
break;
}
#endif
/* fall back to INTX */
case RTE_INTR_MODE_LEGACY:
if (pci_intx_mask_supported(udev->pdev)) {
dev_dbg(&udev->pdev->dev, "using INTX");
udev->info.irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
udev->info.irq = udev->pdev->irq;
udev->mode = RTE_INTR_MODE_LEGACY;
break;
}
dev_notice(&udev->pdev->dev, "PCI INTX mask not supported\n");
/* fall back to no IRQ */
case RTE_INTR_MODE_NONE:
udev->mode = RTE_INTR_MODE_NONE;
udev->info.irq = UIO_IRQ_NONE;
break;
default:
dev_err(&udev->pdev->dev, "invalid IRQ mode %u",
igbuio_intr_mode_preferred);
udev->info.irq = UIO_IRQ_NONE;
err = -EINVAL;
}
if (udev->info.irq != UIO_IRQ_NONE)
err = request_irq(udev->info.irq, igbuio_pci_irqhandler,
udev->info.irq_flags, udev->info.name,
udev);
dev_info(&udev->pdev->dev, "uio device registered with irq %lx\n",
udev->info.irq);
return err;
}