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| author | Maxime Ripard <maxime@cerno.tech> | 2020-09-16 11:56:29 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-09-16 14:18:32 +0300 |
| commit | 05e63c6a7eb136e410087440c4c0330202249ddc (patch) | |
| tree | 282913d6ea178623f24ae7cc3bb08a8c8c18aca9 /include/linux | |
| parent | 2f0ddd89fe32f1534a17ca44ebccc939f8a74af4 (diff) | |
| parent | 38e895487afc2ed42c11045853cbb3fa20b52b6e (diff) | |
| download | linux-05e63c6a7eb136e410087440c4c0330202249ddc.tar.xz | |
Merge branch 'virtio-shm' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse into drm-misc-next
Topic pull request for core virtio changes that will be required by the DRM
driver.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
From: Gurchetan Singh <gurchetansingh@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/CAAfnVBn2BzXWFY3hhjDxd5q0P2_JWn-HdkVxgS94x9keAUZiow@mail.gmail.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/virtio_config.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 8fe857e27ef3..4b8e38c5c4d8 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -11,6 +11,11 @@ struct irq_affinity; +struct virtio_shm_region { + u64 addr; + u64 len; +}; + /** * virtio_config_ops - operations for configuring a virtio device * Note: Do not assume that a transport implements all of the operations @@ -66,6 +71,7 @@ struct irq_affinity; * the caller can then copy. * @set_vq_affinity: set the affinity for a virtqueue (optional). * @get_vq_affinity: get the affinity for a virtqueue (optional). + * @get_shm_region: get a shared memory region based on the index. */ typedef void vq_callback_t(struct virtqueue *); struct virtio_config_ops { @@ -89,6 +95,8 @@ struct virtio_config_ops { const struct cpumask *cpu_mask); const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev, int index); + bool (*get_shm_region)(struct virtio_device *vdev, + struct virtio_shm_region *region, u8 id); }; /* If driver didn't advertise the feature, it will never appear. */ @@ -251,6 +259,15 @@ int virtqueue_set_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask) return 0; } +static inline +bool virtio_get_shm_region(struct virtio_device *vdev, + struct virtio_shm_region *region, u8 id) +{ + if (!vdev->config->get_shm_region) + return false; + return vdev->config->get_shm_region(vdev, region, id); +} + static inline bool virtio_is_little_endian(struct virtio_device *vdev) { return virtio_has_feature(vdev, VIRTIO_F_VERSION_1) || |