Messages in this thread Patch in this message | | | Date | Mon, 8 Dec 2014 15:06:16 +0200 | From | "Michael S. Tsirkin" <> | Subject | [PATCH 1/9] virtio_pci: add isr field |
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Use isr field instead of direct access to ioaddr. This way generalizes easily to virtio 1.0.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- drivers/virtio/virtio_pci.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index 9be59d9..ee1b54c 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -40,6 +40,9 @@ struct virtio_pci_device /* the IO mapping for the PCI config space */ void __iomem *ioaddr; + /* the IO mapping for ISR operation */ + void __iomem *isr; + /* a list of queues so we can dispatch IRQs */ spinlock_t lock; struct list_head virtqueues; @@ -248,7 +251,7 @@ static irqreturn_t vp_interrupt(int irq, void *opaque) /* reading the ISR has the effect of also clearing it so it's very * important to save off the value. */ - isr = ioread8(vp_dev->ioaddr + VIRTIO_PCI_ISR); + isr = ioread8(vp_dev->isr); /* It's definitely not us if the ISR was not high */ if (!isr) @@ -719,6 +722,8 @@ static int virtio_pci_probe(struct pci_dev *pci_dev, goto out_req_regions; } + vp_dev->isr = vp_dev->ioaddr + VIRTIO_PCI_ISR; + pci_set_drvdata(pci_dev, vp_dev); pci_set_master(pci_dev); -- MST
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