diff options
author | Christoph Hellwig <hch@lst.de> | 2017-02-01 15:42:57 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-03 11:49:06 +0100 |
commit | 3bb434cdcc6af3d4e70ba041e6f596e465d11e14 (patch) | |
tree | 75a76770dbbc659ad38dd3bcb365eed0d156244a /drivers/misc | |
parent | cadf8106661c061ab5041282a8e088de4e470526 (diff) | |
download | linux-3bb434cdcc6af3d4e70ba041e6f596e465d11e14.tar.bz2 |
vmw_vmci: switch to pci_irq_alloc_vectors
Cleans up the IRQ management code a lot, including removing a lot of
state from the per-device structure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/vmw_vmci/vmci_guest.c | 75 |
1 files changed, 20 insertions, 55 deletions
diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c index 189b32519748..9d659542a335 100644 --- a/drivers/misc/vmw_vmci/vmci_guest.c +++ b/drivers/misc/vmw_vmci/vmci_guest.c @@ -54,10 +54,7 @@ struct vmci_guest_device { struct device *dev; /* PCI device we are attached to */ void __iomem *iobase; - unsigned int irq; - unsigned int intr_type; bool exclusive_vectors; - struct msix_entry msix_entries[VMCI_MAX_INTRS]; struct tasklet_struct datagram_tasklet; struct tasklet_struct bm_tasklet; @@ -369,30 +366,6 @@ static void vmci_process_bitmap(unsigned long data) } /* - * Enable MSI-X. Try exclusive vectors first, then shared vectors. - */ -static int vmci_enable_msix(struct pci_dev *pdev, - struct vmci_guest_device *vmci_dev) -{ - int i; - int result; - - for (i = 0; i < VMCI_MAX_INTRS; ++i) { - vmci_dev->msix_entries[i].entry = i; - vmci_dev->msix_entries[i].vector = i; - } - - result = pci_enable_msix_exact(pdev, - vmci_dev->msix_entries, VMCI_MAX_INTRS); - if (result == 0) - vmci_dev->exclusive_vectors = true; - else if (result == -ENOSPC) - result = pci_enable_msix_exact(pdev, vmci_dev->msix_entries, 1); - - return result; -} - -/* * Interrupt handler for legacy or MSI interrupt, or for first MSI-X * interrupt (vector VMCI_INTR_DATAGRAM). */ @@ -406,7 +379,7 @@ static irqreturn_t vmci_interrupt(int irq, void *_dev) * Otherwise we must read the ICR to determine what to do. */ - if (dev->intr_type == VMCI_INTR_TYPE_MSIX && dev->exclusive_vectors) { + if (dev->exclusive_vectors) { tasklet_schedule(&dev->datagram_tasklet); } else { unsigned int icr; @@ -491,7 +464,6 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, } vmci_dev->dev = &pdev->dev; - vmci_dev->intr_type = VMCI_INTR_TYPE_INTX; vmci_dev->exclusive_vectors = false; vmci_dev->iobase = iobase; @@ -592,26 +564,26 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, * Enable interrupts. Try MSI-X first, then MSI, and then fallback on * legacy interrupts. */ - if (!vmci_disable_msix && !vmci_enable_msix(pdev, vmci_dev)) { - vmci_dev->intr_type = VMCI_INTR_TYPE_MSIX; - vmci_dev->irq = vmci_dev->msix_entries[0].vector; - } else if (!vmci_disable_msi && !pci_enable_msi(pdev)) { - vmci_dev->intr_type = VMCI_INTR_TYPE_MSI; - vmci_dev->irq = pdev->irq; + error = pci_alloc_irq_vectors(pdev, VMCI_MAX_INTRS, VMCI_MAX_INTRS, + PCI_IRQ_MSIX); + if (error) { + error = pci_alloc_irq_vectors(pdev, 1, 1, + PCI_IRQ_MSIX | PCI_IRQ_MSI | PCI_IRQ_LEGACY); + if (error) + goto err_remove_bitmap; } else { - vmci_dev->intr_type = VMCI_INTR_TYPE_INTX; - vmci_dev->irq = pdev->irq; + vmci_dev->exclusive_vectors = true; } /* * Request IRQ for legacy or MSI interrupts, or for first * MSI-X vector. */ - error = request_irq(vmci_dev->irq, vmci_interrupt, IRQF_SHARED, - KBUILD_MODNAME, vmci_dev); + error = request_irq(pci_irq_vector(pdev, 0), vmci_interrupt, + IRQF_SHARED, KBUILD_MODNAME, vmci_dev); if (error) { dev_err(&pdev->dev, "Irq %u in use: %d\n", - vmci_dev->irq, error); + pci_irq_vector(pdev, 0), error); goto err_disable_msi; } @@ -622,13 +594,13 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, * between the vectors. */ if (vmci_dev->exclusive_vectors) { - error = request_irq(vmci_dev->msix_entries[1].vector, + error = request_irq(pci_irq_vector(pdev, 1), vmci_interrupt_bm, 0, KBUILD_MODNAME, vmci_dev); if (error) { dev_err(&pdev->dev, "Failed to allocate irq %u: %d\n", - vmci_dev->msix_entries[1].vector, error); + pci_irq_vector(pdev, 1), error); goto err_free_irq; } } @@ -651,15 +623,12 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, return 0; err_free_irq: - free_irq(vmci_dev->irq, vmci_dev); + free_irq(pci_irq_vector(pdev, 0), vmci_dev); tasklet_kill(&vmci_dev->datagram_tasklet); tasklet_kill(&vmci_dev->bm_tasklet); err_disable_msi: - if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) - pci_disable_msix(pdev); - else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) - pci_disable_msi(pdev); + pci_free_irq_vectors(pdev); vmci_err = vmci_event_unsubscribe(ctx_update_sub_id); if (vmci_err < VMCI_SUCCESS) @@ -719,14 +688,10 @@ static void vmci_guest_remove_device(struct pci_dev *pdev) * MSI-X, we might have multiple vectors, each with their own * IRQ, which we must free too. */ - free_irq(vmci_dev->irq, vmci_dev); - if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) { - if (vmci_dev->exclusive_vectors) - free_irq(vmci_dev->msix_entries[1].vector, vmci_dev); - pci_disable_msix(pdev); - } else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) { - pci_disable_msi(pdev); - } + if (vmci_dev->exclusive_vectors) + free_irq(pci_irq_vector(pdev, 1), vmci_dev); + free_irq(pci_irq_vector(pdev, 0), vmci_dev); + pci_free_irq_vectors(pdev); tasklet_kill(&vmci_dev->datagram_tasklet); tasklet_kill(&vmci_dev->bm_tasklet); |