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author | Ladi Prosek | 2016-12-16 14:07:08 +0100 |
---|---|---|
committer | Michael Brown | 2017-01-22 14:22:19 +0100 |
commit | fba3b39900af52e695d59bc34f28bb8d22526ddb (patch) | |
tree | 6b2b6062085e52e545306937e48fcf6af5774cca /src/include | |
parent | [virtio] Simplify virtqueue shutdown (diff) | |
download | ipxe-fba3b39900af52e695d59bc34f28bb8d22526ddb.tar.gz ipxe-fba3b39900af52e695d59bc34f28bb8d22526ddb.tar.xz ipxe-fba3b39900af52e695d59bc34f28bb8d22526ddb.zip |
[virtio] Remove queue size limit in legacy virtio
Virtio 0.9 implementation was limited to the maximum virtqueue size of
MAX_QUEUE_NUM and the virtio-net driver would fail to initialize on hosts
exceeding this limit.
This commit lifts the restriction by allocating the queue memory based on
the actual queue size instead of using a fixed maximum. Note that virtio
1.0 still uses the MAX_QUEUE_NUM constant to cap the size (unfortunately
this functionality is not available in virtio 0.9).
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
-rw-r--r-- | src/include/ipxe/virtio-pci.h | 2 | ||||
-rw-r--r-- | src/include/ipxe/virtio-ring.h | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/src/include/ipxe/virtio-pci.h b/src/include/ipxe/virtio-pci.h index f3c9b17c..f3074f14 100644 --- a/src/include/ipxe/virtio-pci.h +++ b/src/include/ipxe/virtio-pci.h @@ -196,9 +196,11 @@ static inline void vp_del_vq(unsigned int ioaddr, int queue_index) struct vring_virtqueue; +void vp_free_vq(struct vring_virtqueue *vq); int vp_find_vq(unsigned int ioaddr, int queue_index, struct vring_virtqueue *vq); + /* Virtio 1.0 I/O routines abstract away the three possible HW access * mechanisms - memory, port I/O, and PCI cfg space access. Also built-in * are endianness conversions - to LE on write and from LE on read. */ diff --git a/src/include/ipxe/virtio-ring.h b/src/include/ipxe/virtio-ring.h index d2ded300..e608e624 100644 --- a/src/include/ipxe/virtio-ring.h +++ b/src/include/ipxe/virtio-ring.h @@ -71,14 +71,12 @@ struct vring { + PAGE_MASK) & ~PAGE_MASK) + \ (sizeof(struct vring_used) + sizeof(struct vring_used_elem) * num)) -typedef unsigned char virtio_queue_t[PAGE_MASK + vring_size(MAX_QUEUE_NUM)]; - struct vring_virtqueue { - virtio_queue_t queue; + unsigned char *queue; struct vring vring; u16 free_head; u16 last_used_idx; - void *vdata[MAX_QUEUE_NUM]; + void **vdata; /* PCI */ int queue_index; struct virtio_pci_region notification; |