2007-11-13 03:30:26 +00:00
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/*
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2014-12-08 10:31:02 +00:00
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* Virtio PCI driver - common functionality for all device versions
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2007-11-13 03:30:26 +00:00
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*
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* This module allows virtio devices to be used over a virtual PCI device.
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* This can be used with QEMU based VMMs like KVM or Xen.
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*
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* Copyright IBM Corp. 2007
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2014-12-08 10:31:02 +00:00
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* Copyright Red Hat, Inc. 2014
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2007-11-13 03:30:26 +00:00
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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2014-12-08 10:31:02 +00:00
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* Rusty Russell <rusty@rustcorp.com.au>
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* Michael S. Tsirkin <mst@redhat.com>
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2007-11-13 03:30:26 +00:00
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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2014-12-08 14:39:45 +00:00
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#include "virtio_pci_common.h"
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2007-11-13 03:30:26 +00:00
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2011-11-17 15:41:15 +00:00
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/* wait for pending irq handlers */
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2014-12-07 16:41:16 +00:00
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void vp_synchronize_vectors(struct virtio_device *vdev)
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2011-11-17 15:41:15 +00:00
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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int i;
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if (vp_dev->intx_enabled)
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synchronize_irq(vp_dev->pci_dev->irq);
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for (i = 0; i < vp_dev->msix_vectors; ++i)
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synchronize_irq(vp_dev->msix_entries[i].vector);
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}
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2007-11-13 03:30:26 +00:00
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/* the notify function used when creating a virt queue */
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2014-12-07 16:41:16 +00:00
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bool vp_notify(struct virtqueue *vq)
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2007-11-13 03:30:26 +00:00
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{
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/* we write the queue's selector into the notification register to
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* signal the other end */
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2014-12-03 16:01:58 +00:00
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iowrite16(vq->index, (void __iomem *)vq->priv);
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2013-10-28 23:08:50 +00:00
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return true;
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2007-11-13 03:30:26 +00:00
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}
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2009-05-14 10:55:31 +00:00
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/* Handle a configuration change: Tell driver if it wants to know. */
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static irqreturn_t vp_config_changed(int irq, void *opaque)
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{
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struct virtio_pci_device *vp_dev = opaque;
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2014-10-14 00:10:34 +00:00
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virtio_config_changed(&vp_dev->vdev);
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2009-05-14 10:55:31 +00:00
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return IRQ_HANDLED;
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}
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/* Notify all virtqueues on an interrupt. */
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static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
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{
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struct virtio_pci_device *vp_dev = opaque;
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struct virtio_pci_vq_info *info;
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irqreturn_t ret = IRQ_NONE;
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unsigned long flags;
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spin_lock_irqsave(&vp_dev->lock, flags);
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list_for_each_entry(info, &vp_dev->virtqueues, node) {
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if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
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ret = IRQ_HANDLED;
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}
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spin_unlock_irqrestore(&vp_dev->lock, flags);
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return ret;
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}
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2007-11-13 03:30:26 +00:00
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/* A small wrapper to also acknowledge the interrupt when it's handled.
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* I really need an EIO hook for the vring so I can ack the interrupt once we
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* know that we'll be handling the IRQ but before we invoke the callback since
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* the callback may notify the host which results in the host attempting to
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* raise an interrupt that we would then mask once we acknowledged the
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* interrupt. */
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static irqreturn_t vp_interrupt(int irq, void *opaque)
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{
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struct virtio_pci_device *vp_dev = opaque;
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u8 isr;
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/* reading the ISR has the effect of also clearing it so it's very
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* important to save off the value. */
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2014-12-02 12:35:27 +00:00
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isr = ioread8(vp_dev->isr);
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2007-11-13 03:30:26 +00:00
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/* It's definitely not us if the ISR was not high */
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if (!isr)
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return IRQ_NONE;
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/* Configuration change? Tell driver if it wants to know. */
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2009-05-14 10:55:31 +00:00
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if (isr & VIRTIO_PCI_ISR_CONFIG)
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vp_config_changed(irq, opaque);
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2007-11-13 03:30:26 +00:00
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2009-05-14 10:55:31 +00:00
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return vp_vring_interrupt(irq, opaque);
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2007-11-13 03:30:26 +00:00
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}
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2009-05-14 10:55:41 +00:00
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static void vp_free_vectors(struct virtio_device *vdev)
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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int i;
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if (vp_dev->intx_enabled) {
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free_irq(vp_dev->pci_dev->irq, vp_dev);
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vp_dev->intx_enabled = 0;
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}
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for (i = 0; i < vp_dev->msix_used_vectors; ++i)
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free_irq(vp_dev->msix_entries[i].vector, vp_dev);
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2012-08-28 11:54:14 +00:00
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for (i = 0; i < vp_dev->msix_vectors; i++)
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if (vp_dev->msix_affinity_masks[i])
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free_cpumask_var(vp_dev->msix_affinity_masks[i]);
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2009-05-14 10:55:41 +00:00
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if (vp_dev->msix_enabled) {
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/* Disable the vector used for configuration */
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2014-12-07 16:18:09 +00:00
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vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR);
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2009-05-14 10:55:41 +00:00
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pci_disable_msix(vp_dev->pci_dev);
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2009-07-23 11:57:37 +00:00
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vp_dev->msix_enabled = 0;
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2009-05-14 10:55:41 +00:00
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}
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2009-07-23 11:57:37 +00:00
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2013-07-02 06:05:13 +00:00
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vp_dev->msix_vectors = 0;
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2009-07-23 11:57:37 +00:00
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vp_dev->msix_used_vectors = 0;
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kfree(vp_dev->msix_names);
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vp_dev->msix_names = NULL;
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kfree(vp_dev->msix_entries);
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vp_dev->msix_entries = NULL;
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2012-08-28 11:54:14 +00:00
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kfree(vp_dev->msix_affinity_masks);
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vp_dev->msix_affinity_masks = NULL;
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2009-05-14 10:55:41 +00:00
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}
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2009-09-24 04:26:29 +00:00
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static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
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bool per_vq_vectors)
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2009-05-14 10:55:41 +00:00
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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const char *name = dev_name(&vp_dev->vdev.dev);
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unsigned i, v;
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int err = -ENOMEM;
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2009-07-26 12:48:08 +00:00
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2013-07-02 06:05:13 +00:00
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vp_dev->msix_vectors = nvectors;
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2009-05-14 10:55:41 +00:00
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vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries,
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GFP_KERNEL);
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if (!vp_dev->msix_entries)
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2009-07-23 11:57:37 +00:00
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goto error;
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2009-05-14 10:55:41 +00:00
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vp_dev->msix_names = kmalloc(nvectors * sizeof *vp_dev->msix_names,
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GFP_KERNEL);
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if (!vp_dev->msix_names)
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2009-07-23 11:57:37 +00:00
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goto error;
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2012-08-28 11:54:14 +00:00
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vp_dev->msix_affinity_masks
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= kzalloc(nvectors * sizeof *vp_dev->msix_affinity_masks,
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GFP_KERNEL);
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if (!vp_dev->msix_affinity_masks)
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goto error;
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for (i = 0; i < nvectors; ++i)
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if (!alloc_cpumask_var(&vp_dev->msix_affinity_masks[i],
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GFP_KERNEL))
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goto error;
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2009-05-14 10:55:41 +00:00
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for (i = 0; i < nvectors; ++i)
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vp_dev->msix_entries[i].entry = i;
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2014-03-13 00:53:37 +00:00
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err = pci_enable_msix_exact(vp_dev->pci_dev,
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vp_dev->msix_entries, nvectors);
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2009-07-26 12:48:08 +00:00
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if (err)
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goto error;
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vp_dev->msix_enabled = 1;
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/* Set the vector used for configuration */
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v = vp_dev->msix_used_vectors;
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snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
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"%s-config", name);
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err = request_irq(vp_dev->msix_entries[v].vector,
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vp_config_changed, 0, vp_dev->msix_names[v],
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vp_dev);
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if (err)
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goto error;
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++vp_dev->msix_used_vectors;
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2009-05-14 10:55:41 +00:00
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|
2014-12-07 16:18:09 +00:00
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v = vp_dev->config_vector(vp_dev, v);
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2009-07-26 12:48:08 +00:00
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/* Verify we had enough resources to assign the vector */
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if (v == VIRTIO_MSI_NO_VECTOR) {
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err = -EBUSY;
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goto error;
|
2009-05-14 10:55:41 +00:00
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}
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2009-07-26 12:48:08 +00:00
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if (!per_vq_vectors) {
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2009-05-14 10:55:41 +00:00
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/* Shared vector for all VQs */
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v = vp_dev->msix_used_vectors;
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snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
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"%s-virtqueues", name);
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err = request_irq(vp_dev->msix_entries[v].vector,
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vp_vring_interrupt, 0, vp_dev->msix_names[v],
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vp_dev);
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if (err)
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2009-07-23 11:57:37 +00:00
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goto error;
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2009-05-14 10:55:41 +00:00
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++vp_dev->msix_used_vectors;
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}
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return 0;
|
2009-07-23 11:57:37 +00:00
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error:
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2009-05-14 10:55:41 +00:00
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vp_free_vectors(vdev);
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return err;
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}
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|
2009-09-24 04:26:29 +00:00
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static int vp_request_intx(struct virtio_device *vdev)
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{
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int err;
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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err = request_irq(vp_dev->pci_dev->irq, vp_interrupt,
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IRQF_SHARED, dev_name(&vdev->dev), vp_dev);
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if (!err)
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vp_dev->intx_enabled = 1;
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return err;
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}
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|
|
|
2014-12-07 16:03:49 +00:00
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static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
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void (*callback)(struct virtqueue *vq),
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const char *name,
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u16 msix_vec)
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{
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|
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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struct virtio_pci_vq_info *info = kmalloc(sizeof *info, GFP_KERNEL);
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struct virtqueue *vq;
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unsigned long flags;
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|
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/* fill out our structure that represents an active queue */
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if (!info)
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return ERR_PTR(-ENOMEM);
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|
|
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|
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vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, msix_vec);
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if (IS_ERR(vq))
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goto out_info;
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info->vq = vq;
|
2011-10-05 05:38:59 +00:00
|
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if (callback) {
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spin_lock_irqsave(&vp_dev->lock, flags);
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list_add(&info->node, &vp_dev->virtqueues);
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spin_unlock_irqrestore(&vp_dev->lock, flags);
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} else {
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INIT_LIST_HEAD(&info->node);
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}
|
2007-11-13 03:30:26 +00:00
|
|
|
|
2014-12-03 15:50:50 +00:00
|
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vp_dev->vqs[index] = info;
|
2007-11-13 03:30:26 +00:00
|
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return vq;
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out_info:
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kfree(info);
|
2014-12-07 16:03:49 +00:00
|
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|
return vq;
|
2007-11-13 03:30:26 +00:00
|
|
|
}
|
|
|
|
|
2014-12-07 16:03:49 +00:00
|
|
|
static void vp_del_vq(struct virtqueue *vq)
|
|
|
|
{
|
|
|
|
struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
|
|
|
|
struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
|
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|
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unsigned long flags;
|
|
|
|
|
|
|
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spin_lock_irqsave(&vp_dev->lock, flags);
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|
|
list_del(&info->node);
|
|
|
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spin_unlock_irqrestore(&vp_dev->lock, flags);
|
|
|
|
|
|
|
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vp_dev->del_vq(info);
|
2007-11-13 03:30:26 +00:00
|
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|
kfree(info);
|
|
|
|
}
|
|
|
|
|
2009-05-14 10:55:41 +00:00
|
|
|
/* the config->del_vqs() implementation */
|
2014-12-07 16:41:16 +00:00
|
|
|
void vp_del_vqs(struct virtio_device *vdev)
|
2009-06-13 04:16:36 +00:00
|
|
|
{
|
2009-07-26 12:48:08 +00:00
|
|
|
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
|
2009-06-13 04:16:36 +00:00
|
|
|
struct virtqueue *vq, *n;
|
2009-07-26 12:48:08 +00:00
|
|
|
struct virtio_pci_vq_info *info;
|
2009-06-13 04:16:36 +00:00
|
|
|
|
2009-07-26 12:48:08 +00:00
|
|
|
list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
|
2014-12-03 15:50:50 +00:00
|
|
|
info = vp_dev->vqs[vq->index];
|
2010-02-25 17:08:55 +00:00
|
|
|
if (vp_dev->per_vq_vectors &&
|
|
|
|
info->msix_vector != VIRTIO_MSI_NO_VECTOR)
|
2009-09-24 04:26:29 +00:00
|
|
|
free_irq(vp_dev->msix_entries[info->msix_vector].vector,
|
|
|
|
vq);
|
2009-06-13 04:16:36 +00:00
|
|
|
vp_del_vq(vq);
|
2009-07-26 12:48:08 +00:00
|
|
|
}
|
|
|
|
vp_dev->per_vq_vectors = false;
|
2009-05-14 10:55:41 +00:00
|
|
|
|
|
|
|
vp_free_vectors(vdev);
|
2014-12-03 15:50:50 +00:00
|
|
|
kfree(vp_dev->vqs);
|
2009-06-13 04:16:36 +00:00
|
|
|
}
|
|
|
|
|
2009-07-26 12:48:08 +00:00
|
|
|
static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs,
|
|
|
|
struct virtqueue *vqs[],
|
|
|
|
vq_callback_t *callbacks[],
|
|
|
|
const char *names[],
|
2009-09-24 04:26:29 +00:00
|
|
|
bool use_msix,
|
2009-07-26 12:48:08 +00:00
|
|
|
bool per_vq_vectors)
|
2009-06-13 04:16:36 +00:00
|
|
|
{
|
2009-07-26 12:48:08 +00:00
|
|
|
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
|
2009-09-24 04:26:29 +00:00
|
|
|
u16 msix_vec;
|
|
|
|
int i, err, nvectors, allocated_vectors;
|
2009-05-14 10:55:41 +00:00
|
|
|
|
2014-12-03 15:50:50 +00:00
|
|
|
vp_dev->vqs = kmalloc(nvqs * sizeof *vp_dev->vqs, GFP_KERNEL);
|
|
|
|
if (!vp_dev->vqs)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2009-09-24 04:26:29 +00:00
|
|
|
if (!use_msix) {
|
|
|
|
/* Old style: one normal interrupt for change and all vqs. */
|
|
|
|
err = vp_request_intx(vdev);
|
|
|
|
if (err)
|
2014-12-03 15:50:50 +00:00
|
|
|
goto error_find;
|
2009-09-24 04:26:29 +00:00
|
|
|
} else {
|
|
|
|
if (per_vq_vectors) {
|
|
|
|
/* Best option: one for change interrupt, one per vq. */
|
|
|
|
nvectors = 1;
|
|
|
|
for (i = 0; i < nvqs; ++i)
|
|
|
|
if (callbacks[i])
|
|
|
|
++nvectors;
|
|
|
|
} else {
|
|
|
|
/* Second best: one for change, shared for all vqs. */
|
|
|
|
nvectors = 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = vp_request_msix_vectors(vdev, nvectors, per_vq_vectors);
|
|
|
|
if (err)
|
2014-12-03 15:50:50 +00:00
|
|
|
goto error_find;
|
2009-09-24 04:26:29 +00:00
|
|
|
}
|
2009-06-13 04:16:36 +00:00
|
|
|
|
2009-07-26 12:48:08 +00:00
|
|
|
vp_dev->per_vq_vectors = per_vq_vectors;
|
|
|
|
allocated_vectors = vp_dev->msix_used_vectors;
|
2009-06-13 04:16:36 +00:00
|
|
|
for (i = 0; i < nvqs; ++i) {
|
2012-09-05 18:47:45 +00:00
|
|
|
if (!names[i]) {
|
|
|
|
vqs[i] = NULL;
|
|
|
|
continue;
|
|
|
|
} else if (!callbacks[i] || !vp_dev->msix_enabled)
|
2009-09-24 04:26:29 +00:00
|
|
|
msix_vec = VIRTIO_MSI_NO_VECTOR;
|
2009-07-26 12:48:08 +00:00
|
|
|
else if (vp_dev->per_vq_vectors)
|
2009-09-24 04:26:29 +00:00
|
|
|
msix_vec = allocated_vectors++;
|
2009-07-26 12:48:08 +00:00
|
|
|
else
|
2009-09-24 04:26:29 +00:00
|
|
|
msix_vec = VP_MSIX_VQ_VECTOR;
|
2014-12-07 16:03:49 +00:00
|
|
|
vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i], msix_vec);
|
2009-07-26 12:48:08 +00:00
|
|
|
if (IS_ERR(vqs[i])) {
|
|
|
|
err = PTR_ERR(vqs[i]);
|
2009-05-14 10:55:41 +00:00
|
|
|
goto error_find;
|
2009-07-26 12:48:08 +00:00
|
|
|
}
|
2009-10-22 13:06:06 +00:00
|
|
|
|
|
|
|
if (!vp_dev->per_vq_vectors || msix_vec == VIRTIO_MSI_NO_VECTOR)
|
|
|
|
continue;
|
|
|
|
|
2009-07-26 12:48:08 +00:00
|
|
|
/* allocate per-vq irq if available and necessary */
|
2009-10-22 13:06:06 +00:00
|
|
|
snprintf(vp_dev->msix_names[msix_vec],
|
|
|
|
sizeof *vp_dev->msix_names,
|
|
|
|
"%s-%s",
|
|
|
|
dev_name(&vp_dev->vdev.dev), names[i]);
|
|
|
|
err = request_irq(vp_dev->msix_entries[msix_vec].vector,
|
|
|
|
vring_interrupt, 0,
|
|
|
|
vp_dev->msix_names[msix_vec],
|
|
|
|
vqs[i]);
|
|
|
|
if (err) {
|
|
|
|
vp_del_vq(vqs[i]);
|
|
|
|
goto error_find;
|
2009-07-26 12:48:08 +00:00
|
|
|
}
|
2009-06-13 04:16:36 +00:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
|
2009-05-14 10:55:41 +00:00
|
|
|
error_find:
|
2009-06-13 04:16:36 +00:00
|
|
|
vp_del_vqs(vdev);
|
2009-07-26 12:48:08 +00:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* the config->find_vqs() implementation */
|
2014-12-07 16:41:16 +00:00
|
|
|
int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
|
|
|
|
struct virtqueue *vqs[],
|
|
|
|
vq_callback_t *callbacks[],
|
|
|
|
const char *names[])
|
2009-07-26 12:48:08 +00:00
|
|
|
{
|
2009-09-24 04:26:29 +00:00
|
|
|
int err;
|
2009-07-26 12:48:08 +00:00
|
|
|
|
2009-09-24 04:26:29 +00:00
|
|
|
/* Try MSI-X with one vector per queue. */
|
|
|
|
err = vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names, true, true);
|
2009-07-26 12:48:08 +00:00
|
|
|
if (!err)
|
|
|
|
return 0;
|
2009-09-24 04:26:29 +00:00
|
|
|
/* Fallback: MSI-X with one vector for config, one shared for queues. */
|
2009-07-26 12:48:08 +00:00
|
|
|
err = vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names,
|
2009-09-24 04:26:29 +00:00
|
|
|
true, false);
|
2009-07-26 12:48:08 +00:00
|
|
|
if (!err)
|
|
|
|
return 0;
|
|
|
|
/* Finally fall back to regular interrupts. */
|
2009-09-24 04:26:29 +00:00
|
|
|
return vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names,
|
|
|
|
false, false);
|
2009-06-13 04:16:36 +00:00
|
|
|
}
|
|
|
|
|
2014-12-07 16:41:16 +00:00
|
|
|
const char *vp_bus_name(struct virtio_device *vdev)
|
2011-11-14 14:17:08 +00:00
|
|
|
{
|
|
|
|
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
|
|
|
|
|
|
|
|
return pci_name(vp_dev->pci_dev);
|
|
|
|
}
|
|
|
|
|
2012-08-28 11:54:14 +00:00
|
|
|
/* Setup the affinity for a virtqueue:
|
|
|
|
* - force the affinity for per vq vector
|
|
|
|
* - OR over all affinities for shared MSI
|
|
|
|
* - ignore the affinity request if we're using INTX
|
|
|
|
*/
|
2014-12-07 16:41:16 +00:00
|
|
|
int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
|
2012-08-28 11:54:14 +00:00
|
|
|
{
|
|
|
|
struct virtio_device *vdev = vq->vdev;
|
|
|
|
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
|
2014-12-03 15:50:50 +00:00
|
|
|
struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
|
2012-08-28 11:54:14 +00:00
|
|
|
struct cpumask *mask;
|
|
|
|
unsigned int irq;
|
|
|
|
|
|
|
|
if (!vq->callback)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (vp_dev->msix_enabled) {
|
|
|
|
mask = vp_dev->msix_affinity_masks[info->msix_vector];
|
|
|
|
irq = vp_dev->msix_entries[info->msix_vector].vector;
|
|
|
|
if (cpu == -1)
|
|
|
|
irq_set_affinity_hint(irq, NULL);
|
|
|
|
else {
|
|
|
|
cpumask_set_cpu(cpu, mask);
|
|
|
|
irq_set_affinity_hint(irq, mask);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-12-07 16:41:16 +00:00
|
|
|
void virtio_pci_release_dev(struct device *_d)
|
2008-12-10 17:45:34 +00:00
|
|
|
{
|
2011-11-07 16:37:05 +00:00
|
|
|
/*
|
|
|
|
* No need for a release method as we allocate/free
|
|
|
|
* all devices together with the pci devices.
|
|
|
|
* Provide an empty one to avoid getting a warning from core.
|
|
|
|
*/
|
2008-12-10 17:45:34 +00:00
|
|
|
}
|
|
|
|
|
2013-09-09 00:27:12 +00:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
2011-12-22 11:28:26 +00:00
|
|
|
static int virtio_pci_freeze(struct device *dev)
|
|
|
|
{
|
|
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
|
|
struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
|
|
|
|
int ret;
|
|
|
|
|
2014-10-14 00:10:35 +00:00
|
|
|
ret = virtio_device_freeze(&vp_dev->vdev);
|
2011-12-22 11:28:26 +00:00
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
pci_disable_device(pci_dev);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-03-29 07:24:43 +00:00
|
|
|
static int virtio_pci_restore(struct device *dev)
|
2011-12-22 11:28:26 +00:00
|
|
|
{
|
|
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
|
|
struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = pci_enable_device(pci_dev);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2012-03-29 07:24:43 +00:00
|
|
|
|
2011-12-22 11:28:26 +00:00
|
|
|
pci_set_master(pci_dev);
|
2014-10-14 00:10:35 +00:00
|
|
|
return virtio_device_restore(&vp_dev->vdev);
|
2011-12-22 11:28:26 +00:00
|
|
|
}
|
|
|
|
|
2014-12-11 19:47:49 +00:00
|
|
|
static const struct dev_pm_ops virtio_pci_pm_ops = {
|
2012-03-29 07:28:05 +00:00
|
|
|
SET_SYSTEM_SLEEP_PM_OPS(virtio_pci_freeze, virtio_pci_restore)
|
2011-12-22 11:28:25 +00:00
|
|
|
};
|
2007-11-13 03:30:26 +00:00
|
|
|
#endif
|
2014-12-11 19:47:49 +00:00
|
|
|
|
|
|
|
|
|
|
|
/* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */
|
|
|
|
static const struct pci_device_id virtio_pci_id_table[] = {
|
|
|
|
{ PCI_DEVICE(0x1af4, PCI_ANY_ID) },
|
|
|
|
{ 0 }
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(pci, virtio_pci_id_table);
|
|
|
|
|
|
|
|
static int virtio_pci_probe(struct pci_dev *pci_dev,
|
|
|
|
const struct pci_device_id *id)
|
|
|
|
{
|
|
|
|
return virtio_pci_legacy_probe(pci_dev, id);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_pci_remove(struct pci_dev *pci_dev)
|
|
|
|
{
|
|
|
|
virtio_pci_legacy_remove(pci_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct pci_driver virtio_pci_driver = {
|
|
|
|
.name = "virtio-pci",
|
|
|
|
.id_table = virtio_pci_id_table,
|
|
|
|
.probe = virtio_pci_probe,
|
|
|
|
.remove = virtio_pci_remove,
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
.driver.pm = &virtio_pci_pm_ops,
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
module_pci_driver(virtio_pci_driver);
|
2014-12-16 22:54:03 +00:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
|
|
|
|
MODULE_DESCRIPTION("virtio-pci");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION("1");
|