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authorLinus Torvalds <torvalds@linux-foundation.org>2023-09-04 10:43:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-09-04 10:43:44 -0700
commite4f1b8202fb59c56a3de7642d50326923670513f (patch)
treea83d7a3ab0b8440c3a81d7a96014488b7ebfe020 /include
parent5c5e0e81202667f9c052edb99699818363b19129 (diff)
parent1acfe2c1225899eab5ab724c91b7e1eb2881b9ab (diff)
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin: "A small pull request this time around, mostly because the vduse network got postponed to next relase so we can be sure we got the security store right" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio_ring: fix avail_wrap_counter in virtqueue_add_packed virtio_vdpa: build affinity masks conditionally virtio_net: merge dma operations when filling mergeable buffers virtio_ring: introduce dma sync api for virtqueue virtio_ring: introduce dma map api for virtqueue virtio_ring: introduce virtqueue_reset() virtio_ring: separate the logic of reset/enable from virtqueue_resize virtio_ring: correct the expression of the description of virtqueue_resize() virtio_ring: skip unmap for premapped virtio_ring: introduce virtqueue_dma_dev() virtio_ring: support add premapped buf virtio_ring: introduce virtqueue_set_dma_premapped() virtio_ring: put mapping error check in vring_map_one_sg virtio_ring: check use_dma_api before unmap desc for indirect vdpa_sim: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK vdpa: add get_backend_features vdpa operation vdpa: accept VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK backend feature vdpa: add VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK flag vdpa/mlx5: Remove unused function declarations
Diffstat (limited to 'include')
-rw-r--r--include/linux/vdpa.h4
-rw-r--r--include/linux/virtio.h22
-rw-r--r--include/uapi/linux/vhost_types.h4
3 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index db1b0eaef4eb..0e652026b776 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -208,6 +208,9 @@ struct vdpa_map_file {
* @vdev: vdpa device
* Returns the virtio features support by the
* device
+ * @get_backend_features: Get parent-specific backend features (optional)
+ * Returns the vdpa features supported by the
+ * device.
* @set_driver_features: Set virtio features supported by the driver
* @vdev: vdpa device
* @features: feature support by the driver
@@ -358,6 +361,7 @@ struct vdpa_config_ops {
u32 (*get_vq_align)(struct vdpa_device *vdev);
u32 (*get_vq_group)(struct vdpa_device *vdev, u16 idx);
u64 (*get_device_features)(struct vdpa_device *vdev);
+ u64 (*get_backend_features)(const struct vdpa_device *vdev);
int (*set_driver_features)(struct vdpa_device *vdev, u64 features);
u64 (*get_driver_features)(struct vdpa_device *vdev);
void (*set_config_cb)(struct vdpa_device *vdev,
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index de6041deee37..1311a7fbe675 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/gfp.h>
+#include <linux/dma-mapping.h>
/**
* struct virtqueue - a queue to register buffers for sending or receiving.
@@ -61,6 +62,8 @@ int virtqueue_add_sgs(struct virtqueue *vq,
void *data,
gfp_t gfp);
+struct device *virtqueue_dma_dev(struct virtqueue *vq);
+
bool virtqueue_kick(struct virtqueue *vq);
bool virtqueue_kick_prepare(struct virtqueue *vq);
@@ -78,6 +81,8 @@ bool virtqueue_enable_cb(struct virtqueue *vq);
unsigned virtqueue_enable_cb_prepare(struct virtqueue *vq);
+int virtqueue_set_dma_premapped(struct virtqueue *_vq);
+
bool virtqueue_poll(struct virtqueue *vq, unsigned);
bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
@@ -95,6 +100,8 @@ dma_addr_t virtqueue_get_used_addr(const struct virtqueue *vq);
int virtqueue_resize(struct virtqueue *vq, u32 num,
void (*recycle)(struct virtqueue *vq, void *buf));
+int virtqueue_reset(struct virtqueue *vq,
+ void (*recycle)(struct virtqueue *vq, void *buf));
/**
* struct virtio_device - representation of a device using virtio
@@ -206,4 +213,19 @@ void unregister_virtio_driver(struct virtio_driver *drv);
#define module_virtio_driver(__virtio_driver) \
module_driver(__virtio_driver, register_virtio_driver, \
unregister_virtio_driver)
+
+dma_addr_t virtqueue_dma_map_single_attrs(struct virtqueue *_vq, void *ptr, size_t size,
+ enum dma_data_direction dir, unsigned long attrs);
+void virtqueue_dma_unmap_single_attrs(struct virtqueue *_vq, dma_addr_t addr,
+ size_t size, enum dma_data_direction dir,
+ unsigned long attrs);
+int virtqueue_dma_mapping_error(struct virtqueue *_vq, dma_addr_t addr);
+
+bool virtqueue_dma_need_sync(struct virtqueue *_vq, dma_addr_t addr);
+void virtqueue_dma_sync_single_range_for_cpu(struct virtqueue *_vq, dma_addr_t addr,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir);
+void virtqueue_dma_sync_single_range_for_device(struct virtqueue *_vq, dma_addr_t addr,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir);
#endif /* _LINUX_VIRTIO_H */
diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
index d3aad12ad1fa..2d827d22cd99 100644
--- a/include/uapi/linux/vhost_types.h
+++ b/include/uapi/linux/vhost_types.h
@@ -181,5 +181,9 @@ struct vhost_vdpa_iova_range {
#define VHOST_BACKEND_F_SUSPEND 0x4
/* Device can be resumed */
#define VHOST_BACKEND_F_RESUME 0x5
+/* Device supports the driver enabling virtqueues both before and after
+ * DRIVER_OK
+ */
+#define VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK 0x6
#endif