diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-09-11 16:31:26 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-09-29 22:36:38 +0300 |
| commit | 61771468e0a567f007fc450725063bb9cf7eb199 (patch) | |
| tree | 5065da5efca34a18e5cb0b0d9f7418e533444981 /drivers/vfio/pci/vfio_pci_intrs.c | |
| parent | c93a97ee0583cd65adaf872e7cc402493eae92a7 (diff) | |
| download | linux-61771468e0a567f007fc450725063bb9cf7eb199.tar.xz | |
vfio_pci: use pci_alloc_irq_vectors
Simplify the interrupt setup by using the new PCI layer helpers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_intrs.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_intrs.c | 45 |
1 files changed, 10 insertions, 35 deletions
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index aa23e9a4a22f..c2e60893cd09 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -250,6 +250,7 @@ static irqreturn_t vfio_msihandler(int irq, void *arg) static int vfio_msi_enable(struct vfio_pci_device *vdev, int nvec, bool msix) { struct pci_dev *pdev = vdev->pdev; + unsigned int flag = msix ? PCI_IRQ_MSIX : PCI_IRQ_MSI; int ret; if (!is_irq_none(vdev)) @@ -259,35 +260,13 @@ static int vfio_msi_enable(struct vfio_pci_device *vdev, int nvec, bool msix) if (!vdev->ctx) return -ENOMEM; - if (msix) { - int i; - - vdev->msix = kzalloc(nvec * sizeof(struct msix_entry), - GFP_KERNEL); - if (!vdev->msix) { - kfree(vdev->ctx); - return -ENOMEM; - } - - for (i = 0; i < nvec; i++) - vdev->msix[i].entry = i; - - ret = pci_enable_msix_range(pdev, vdev->msix, 1, nvec); - if (ret < nvec) { - if (ret > 0) - pci_disable_msix(pdev); - kfree(vdev->msix); - kfree(vdev->ctx); - return ret; - } - } else { - ret = pci_enable_msi_range(pdev, 1, nvec); - if (ret < nvec) { - if (ret > 0) - pci_disable_msi(pdev); - kfree(vdev->ctx); - return ret; - } + /* return the number of supported vectors if we can't get all: */ + ret = pci_alloc_irq_vectors(pdev, 1, nvec, flag); + if (ret < nvec) { + if (ret > 0) + pci_free_irq_vectors(pdev); + kfree(vdev->ctx); + return ret; } vdev->num_ctx = nvec; @@ -315,7 +294,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, if (vector < 0 || vector >= vdev->num_ctx) return -EINVAL; - irq = msix ? vdev->msix[vector].vector : pdev->irq + vector; + irq = pci_irq_vector(pdev, vector); if (vdev->ctx[vector].trigger) { free_irq(irq, vdev->ctx[vector].trigger); @@ -408,11 +387,7 @@ static void vfio_msi_disable(struct vfio_pci_device *vdev, bool msix) vfio_msi_set_block(vdev, 0, vdev->num_ctx, NULL, msix); - if (msix) { - pci_disable_msix(vdev->pdev); - kfree(vdev->msix); - } else - pci_disable_msi(pdev); + pci_free_irq_vectors(pdev); /* * Both disable paths above use pci_intx_for_msi() to clear DisINTx |