igb_uio: switch to new irq function for MSI-X

pci_enable_msix() will be removed in kernel 4.12.
The new API pci_alloc_irq_vectors() is available
since linux 4.8, thus let's use it.

Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aff171641d18
Link: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=4244de1c64de
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: David Marchand <david.marchand@6wind.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
index 0d781e4..b800a53 100644 (file)
--- a/lib/librte_eal/linuxapp/igb_uio/compat.h
+++ b/lib/librte_eal/linuxapp/igb_uio/compat.h
@@ -123,3 +123,7 @@ static bool pci_check_and_mask_intx(struct pci_dev *pdev)
 }
 
 #endif /* < 3.3.0 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+#define HAVE_PCI_ENABLE_MSIX
+#endif

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index 192bd4a..b9d427c 100644 (file)
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -325,7 +325,9 @@ static int
 igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
        struct rte_uio_pci_dev *udev;
+#ifdef HAVE_PCI_ENABLE_MSIX
        struct msix_entry msix_entry;
+#endif
        dma_addr_t map_dma_addr;
        void *map_addr;
        int err;
@@ -381,6 +383,7 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
        switch (igbuio_intr_mode_preferred) {
        case RTE_INTR_MODE_MSIX:
                /* Only 1 msi-x vector needed */
+#ifdef HAVE_PCI_ENABLE_MSIX
                msix_entry.entry = 0;
                if (pci_enable_msix(dev, &msix_entry, 1) == 0) {
                        dev_dbg(&dev->dev, "using MSI-X");
@@ -389,6 +392,14 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                        udev->mode = RTE_INTR_MODE_MSIX;
                        break;
                }
+#else
+               if (pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_MSIX) == 1) {
+                       dev_dbg(&dev->dev, "using MSI-X");
+                       udev->info.irq = pci_irq_vector(dev, 0);
+                       udev->mode = RTE_INTR_MODE_MSIX;
+                       break;
+               }
+#endif
                /* fall back to INTX */
        case RTE_INTR_MODE_LEGACY:
                if (pci_intx_mask_supported(dev)) {