[dpdk-dev] [PATCH v3] igb_uio: switch to pci_alloc_irq_vectors()
Nicolas Dichtel
nicolas.dichtel at 6wind.com
Thu Apr 20 15:11:23 CEST 2017
pci_enable_msix() will be removed in kernel 4.12. The new API 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 at 6wind.com>
Reviewed-by: David Marchand <david.marchand at 6wind.com>
Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
v3: move code in compat.h at the end of the file
v2: use compat.h and define HAVE_PCI_ENABLE_MSIX
limit commit log to 75 columns
lib/librte_eal/linuxapp/igb_uio/compat.h | 4 ++++
lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 11 +++++++++++
2 files changed, 15 insertions(+)
diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
index 0d781e482562..b800a53cd30b 100644
--- 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 192bd4a96b68..b9d427c51c57 100644
--- 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)) {
--
2.11.0
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