diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-07 21:04:56 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-07 21:04:56 +0900 |
commit | dc92b1f9ab1e1665dbbc56911782358e7f9a49f9 (patch) | |
tree | 965ccb4a0f2c24a8b24adce415f6506246d07a90 /include | |
parent | 5e090ed7af10729a396a25df43d69a236e789736 (diff) | |
parent | ca16f580a5db7e60bfafe59a50bb133bd3347491 (diff) |
Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio changes from Rusty Russell:
"New workflow: same git trees pulled by linux-next get sent straight to
Linus. Git is awkward at shuffling patches compared with quilt or mq,
but that doesn't happen often once things get into my -next branch."
* 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (24 commits)
lguest: fix occasional crash in example launcher.
virtio-blk: Disable callback in virtblk_done()
virtio_mmio: Don't attempt to create empty virtqueues
virtio_mmio: fix off by one error allocating queue
drivers/virtio/virtio_pci.c: fix error return code
virtio: don't crash when device is buggy
virtio: remove CONFIG_VIRTIO_RING
virtio: add help to CONFIG_VIRTIO option.
virtio: support reserved vqs
virtio: introduce an API to set affinity for a virtqueue
virtio-ring: move queue_index to vring_virtqueue
virtio_balloon: not EXPERIMENTAL any more.
virtio-balloon: dependency fix
virtio-blk: fix NULL checking in virtblk_alloc_req()
virtio-blk: Add REQ_FLUSH and REQ_FUA support to bio path
virtio-blk: Add bio-based IO path for virtio-blk
virtio: console: fix error handling in init() function
tools: Fix pthread flag for Makefile of trace-agent used by virtio-trace
tools: Add guest trace agent as a user tool
virtio/console: Allocate scatterlist according to the current pipe size
...
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/virtio.h | 2 | ||||
-rw-r--r-- | include/linux/virtio_config.h | 23 | ||||
-rw-r--r-- | include/linux/virtio_ring.h | 3 |
3 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index a1ba8bbd9fbe..533b1157f22e 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -50,6 +50,8 @@ void *virtqueue_detach_unused_buf(struct virtqueue *vq); unsigned int virtqueue_get_vring_size(struct virtqueue *vq); +int virtqueue_get_queue_index(struct virtqueue *vq); + /** * virtio_device - representation of a device using virtio * @index: unique position on the virtio bus diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index fc457f452f64..e2850a7ea276 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -84,7 +84,9 @@ * nvqs: the number of virtqueues to find * vqs: on success, includes new virtqueues * callbacks: array of callbacks, for each virtqueue + * include a NULL entry for vqs that do not need a callback * names: array of virtqueue names (mainly for debugging) + * include a NULL entry for vqs unused by driver * Returns 0 on success or error status * @del_vqs: free virtqueues found by find_vqs(). * @get_features: get the array of feature bits for this device. @@ -98,6 +100,7 @@ * vdev: the virtio_device * This returns a pointer to the bus name a la pci_name from which * the caller can then copy. + * @set_vq_affinity: set the affinity for a virtqueue. */ typedef void vq_callback_t(struct virtqueue *); struct virtio_config_ops { @@ -116,6 +119,7 @@ struct virtio_config_ops { u32 (*get_features)(struct virtio_device *vdev); void (*finalize_features)(struct virtio_device *vdev); const char *(*bus_name)(struct virtio_device *vdev); + int (*set_vq_affinity)(struct virtqueue *vq, int cpu); }; /* If driver didn't advertise the feature, it will never appear. */ @@ -190,5 +194,24 @@ const char *virtio_bus_name(struct virtio_device *vdev) return vdev->config->bus_name(vdev); } +/** + * virtqueue_set_affinity - setting affinity for a virtqueue + * @vq: the virtqueue + * @cpu: the cpu no. + * + * Pay attention the function are best-effort: the affinity hint may not be set + * due to config support, irq type and sharing. + * + */ +static inline +int virtqueue_set_affinity(struct virtqueue *vq, int cpu) +{ + struct virtio_device *vdev = vq->vdev; + if (vdev->config->set_vq_affinity) + return vdev->config->set_vq_affinity(vq, cpu); + return 0; +} + + #endif /* __KERNEL__ */ #endif /* _LINUX_VIRTIO_CONFIG_H */ diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index e338730c2660..c2d793a06ad7 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -165,7 +165,8 @@ static inline int vring_need_event(__u16 event_idx, __u16 new_idx, __u16 old) struct virtio_device; struct virtqueue; -struct virtqueue *vring_new_virtqueue(unsigned int num, +struct virtqueue *vring_new_virtqueue(unsigned int index, + unsigned int num, unsigned int vring_align, struct virtio_device *vdev, bool weak_barriers, |