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| author | Michael S. Tsirkin <mst@redhat.com> | 2009-06-21 19:50:13 +0300 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-06-24 09:09:14 -0500 |
| commit | 7055e687cd4cea5befefb2d8012e4e2574cfa9b3 (patch) | |
| tree | d5827b1fae3a5f3523d2c024443b19e10c57ade1 /hw/virtio-pci.c | |
| parent | 54c96da798141feadd1424ef43fba19757e50d39 (diff) | |
| download | qemu-7055e687cd4cea5befefb2d8012e4e2574cfa9b3.zip qemu-7055e687cd4cea5befefb2d8012e4e2574cfa9b3.tar.gz qemu-7055e687cd4cea5befefb2d8012e4e2574cfa9b3.tar.bz2 | |
qemu/virtio: virtio support for many interrupt vectors
Extend virtio to support many interrupt vectors, and rearrange code in
preparation for multi-vector support (mostly move reset out to bindings,
because we will have to reset the vectors in transport-specific code).
Actual bindings in pci, and use in net, to follow.
Load and save are not connected to bindings yet, so they are left
stubbed out for now.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/virtio-pci.c')
| -rw-r--r-- | hw/virtio-pci.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index df45036..cc23048 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -78,13 +78,19 @@ typedef struct { /* virtio device */ -static void virtio_pci_update_irq(void *opaque) +static void virtio_pci_notify(void *opaque, uint16_t vector) { VirtIOPCIProxy *proxy = opaque; qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); } +static void virtio_pci_reset(void *opaque) +{ + VirtIOPCIProxy *proxy = opaque; + virtio_reset(proxy->vdev); +} + static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) { VirtIOPCIProxy *proxy = opaque; @@ -108,7 +114,10 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) break; case VIRTIO_PCI_QUEUE_PFN: pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; - virtio_queue_set_addr(vdev, vdev->queue_sel, pa); + if (pa == 0) + virtio_pci_reset(proxy); + else + virtio_queue_set_addr(vdev, vdev->queue_sel, pa); break; case VIRTIO_PCI_QUEUE_SEL: if (val < VIRTIO_PCI_QUEUE_MAX) @@ -120,7 +129,7 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) case VIRTIO_PCI_STATUS: vdev->status = val & 0xFF; if (vdev->status == 0) - virtio_reset(vdev); + virtio_pci_reset(proxy); break; } } @@ -160,7 +169,7 @@ static uint32_t virtio_ioport_read(void *opaque, uint32_t addr) /* reading from the ISR also clears it. */ ret = vdev->isr; vdev->isr = 0; - virtio_update_irq(vdev); + qemu_set_irq(proxy->pci_dev.irq[0], 0); break; default: break; @@ -245,7 +254,7 @@ static void virtio_map(PCIDevice *pci_dev, int region_num, } static const VirtIOBindings virtio_pci_bindings = { - .update_irq = virtio_pci_update_irq + .notify = virtio_pci_notify }; static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, @@ -257,6 +266,9 @@ static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, proxy->vdev = vdev; + /* No support for multiple vectors yet. */ + proxy->vdev->nvectors = 0; + config = proxy->pci_dev.config; pci_config_set_vendor_id(config, vendor); pci_config_set_device_id(config, device); @@ -281,6 +293,8 @@ static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, pci_register_bar(&proxy->pci_dev, 0, size, PCI_ADDRESS_SPACE_IO, virtio_map); + qemu_register_reset(virtio_pci_reset, 0, proxy); + virtio_bind_device(vdev, &virtio_pci_bindings, proxy); } |