summaryrefslogtreecommitdiff
path: root/drivers/virtio/virtio_pci_common.h
diff options
context:
space:
mode:
authorMichael S. Tsirkin <mst@redhat.com>2014-12-11 14:59:51 +0300
committerRusty Russell <rusty@rustcorp.com.au>2015-01-21 08:58:53 +0300
commit1fcf0512c9c870e78e1c9898ecb9458593403466 (patch)
tree002fa2a03688453e491f2224c31a96c1b3a47be6 /drivers/virtio/virtio_pci_common.h
parent71d70c266c84c4e708bb36b20d0c0a29af42821c (diff)
downloadlinux-1fcf0512c9c870e78e1c9898ecb9458593403466.tar.xz
virtio_pci: modern driver
Lightly tested against qemu. One thing *not* implemented here is separate mappings for descriptor/avail/used rings. That's nice to have, will be done later after we have core support. This also exposes the PCI layout to userspace, and adds macros for PCI layout offsets: QEMU wants it, so why not? Trust, but verify. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_pci_common.h')
-rw-r--r--drivers/virtio/virtio_pci_common.h25
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 2b1e70db44a0..610c43f19230 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -53,12 +53,29 @@ struct virtio_pci_device {
struct virtio_device vdev;
struct pci_dev *pci_dev;
+ /* In legacy mode, these two point to within ->legacy. */
+ /* Where to read and clear interrupt */
+ u8 __iomem *isr;
+
+ /* Modern only fields */
+ /* The IO mapping for the PCI config space (non-legacy mode) */
+ struct virtio_pci_common_cfg __iomem *common;
+ /* Device-specific data (non-legacy mode) */
+ void __iomem *device;
+
+ /* So we can sanity-check accesses. */
+ size_t device_len;
+
+ /* Capability for when we need to map notifications per-vq. */
+ int notify_map_cap;
+
+ /* Multiply queue_notify_off by this value. (non-legacy mode). */
+ u32 notify_offset_multiplier;
+
+ /* Legacy only field */
/* 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;
@@ -129,5 +146,7 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu);
int virtio_pci_legacy_probe(struct virtio_pci_device *);
void virtio_pci_legacy_remove(struct virtio_pci_device *);
+int virtio_pci_modern_probe(struct virtio_pci_device *);
+void virtio_pci_modern_remove(struct virtio_pci_device *);
#endif