diff options
Diffstat (limited to 'include/linux/virtio_config.h')
| -rw-r--r-- | include/linux/virtio_config.h | 68 |
1 files changed, 33 insertions, 35 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index da9b271b54db..169c7d367fac 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -19,6 +19,20 @@ struct virtio_shm_region { typedef void vq_callback_t(struct virtqueue *); /** + * struct virtqueue_info - Info for a virtqueue passed to find_vqs(). + * @name: virtqueue description. Used mainly for debugging, NULL for + * a virtqueue unused by the driver. + * @callback: A callback to invoke on a used buffer notification. + * NULL for a virtqueue that does not need a callback. + * @ctx: A flag to indicate to maintain an extra context per virtqueue. + */ +struct virtqueue_info { + const char *name; + vq_callback_t *callback; + bool ctx; +}; + +/** * struct virtio_config_ops - operations for configuring a virtio device * Note: Do not assume that a transport implements all of the operations * getting/setting a value as a simple read/write! Generally speaking, @@ -53,10 +67,7 @@ typedef void vq_callback_t(struct virtqueue *); * vdev: the virtio_device * 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 + * vqs_info: array of virtqueue info structures * Returns 0 on success or error status * @del_vqs: free virtqueues found by find_vqs(). * @synchronize_cbs: synchronize with the virtqueue callbacks (optional) @@ -93,8 +104,6 @@ typedef void vq_callback_t(struct virtqueue *); * Returns 0 on success or error status * If disable_vq_and_reset is set, then enable_vq_after_reset must also be * set. - * @create_avq: create admin virtqueue resource. - * @destroy_avq: destroy admin virtqueue resource. */ struct virtio_config_ops { void (*get)(struct virtio_device *vdev, unsigned offset, @@ -105,9 +114,9 @@ struct virtio_config_ops { u8 (*get_status)(struct virtio_device *vdev); void (*set_status)(struct virtio_device *vdev, u8 status); void (*reset)(struct virtio_device *vdev); - int (*find_vqs)(struct virtio_device *, unsigned nvqs, - struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + int (*find_vqs)(struct virtio_device *vdev, unsigned int nvqs, + struct virtqueue *vqs[], + struct virtqueue_info vqs_info[], struct irq_affinity *desc); void (*del_vqs)(struct virtio_device *); void (*synchronize_cbs)(struct virtio_device *); @@ -117,13 +126,11 @@ struct virtio_config_ops { int (*set_vq_affinity)(struct virtqueue *vq, const struct cpumask *cpu_mask); const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev, - int index); + int index); bool (*get_shm_region)(struct virtio_device *vdev, struct virtio_shm_region *region, u8 id); int (*disable_vq_and_reset)(struct virtqueue *vq); int (*enable_vq_after_reset)(struct virtqueue *vq); - int (*create_avq)(struct virtio_device *vdev); - void (*destroy_avq)(struct virtio_device *vdev); }; /* If driver didn't advertise the feature, it will never appear. */ @@ -211,38 +218,29 @@ static inline bool virtio_has_dma_quirk(const struct virtio_device *vdev) } static inline +int virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs, + struct virtqueue *vqs[], + struct virtqueue_info vqs_info[], + struct irq_affinity *desc) +{ + return vdev->config->find_vqs(vdev, nvqs, vqs, vqs_info, desc); +} + +static inline struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev, vq_callback_t *c, const char *n) { - vq_callback_t *callbacks[] = { c }; - const char *names[] = { n }; + struct virtqueue_info vqs_info[] = { + { n, c }, + }; struct virtqueue *vq; - int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL, - NULL); + int err = virtio_find_vqs(vdev, 1, &vq, vqs_info, NULL); + if (err < 0) return ERR_PTR(err); return vq; } -static inline -int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs, - struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], - struct irq_affinity *desc) -{ - return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, desc); -} - -static inline -int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, - struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, - struct irq_affinity *desc) -{ - return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, - desc); -} - /** * virtio_synchronize_cbs - synchronize with virtqueue callbacks * @dev: the virtio device |