diff options
Diffstat (limited to 'include/linux/vdpa.h')
| -rw-r--r-- | include/linux/vdpa.h | 62 |
1 files changed, 40 insertions, 22 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 8cfe49d201dd..3972ab765de1 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -43,17 +43,17 @@ struct vdpa_vq_state_split { * @last_used_idx: used index */ struct vdpa_vq_state_packed { - u16 last_avail_counter:1; - u16 last_avail_idx:15; - u16 last_used_counter:1; - u16 last_used_idx:15; + u16 last_avail_counter:1; + u16 last_avail_idx:15; + u16 last_used_counter:1; + u16 last_used_idx:15; }; struct vdpa_vq_state { - union { - struct vdpa_vq_state_split split; - struct vdpa_vq_state_packed packed; - }; + union { + struct vdpa_vq_state_split split; + struct vdpa_vq_state_packed packed; + }; }; struct vdpa_mgmt_dev; @@ -65,6 +65,7 @@ struct vdpa_mgmt_dev; * @config: the configuration ops for this device. * @index: device index * @features_valid: were features initialized? for legacy guests + * @use_va: indicate whether virtual address must be used by this device * @nvqs: maximum number of supported virtqueues * @mdev: management device pointer; caller must setup when registering device as part * of dev_add() mgmtdev ops callback before invoking _vdpa_register_device(). @@ -75,6 +76,7 @@ struct vdpa_device { const struct vdpa_config_ops *config; unsigned int index; bool features_valid; + bool use_va; int nvqs; struct vdpa_mgmt_dev *mdev; }; @@ -90,6 +92,16 @@ struct vdpa_iova_range { }; /** + * Corresponding file area for device memory mapping + * @file: vma->vm_file for the mapping + * @offset: mapping offset in the vm_file + */ +struct vdpa_map_file { + struct file *file; + u64 offset; +}; + +/** * struct vdpa_config_ops - operations for configuring a vDPA device. * Note: vDPA device drivers are required to implement all of the * operations unless it is mentioned to be optional in the following @@ -131,7 +143,7 @@ struct vdpa_iova_range { * @vdev: vdpa device * @idx: virtqueue index * @state: pointer to returned state (last_avail_idx) - * @get_vq_notification: Get the notification area for a virtqueue + * @get_vq_notification: Get the notification area for a virtqueue * @vdev: vdpa device * @idx: virtqueue index * Returns the notifcation area @@ -171,6 +183,9 @@ struct vdpa_iova_range { * @set_status: Set the device status * @vdev: vdpa device * @status: virtio device status + * @reset: Reset device + * @vdev: vdpa device + * Returns integer: success (0) or error (< 0) * @get_config_size: Get the size of the configuration space * @vdev: vdpa device * Returns size_t: configuration size @@ -255,6 +270,7 @@ struct vdpa_config_ops { u32 (*get_vendor_id)(struct vdpa_device *vdev); u8 (*get_status)(struct vdpa_device *vdev); void (*set_status)(struct vdpa_device *vdev, u8 status); + int (*reset)(struct vdpa_device *vdev); size_t (*get_config_size)(struct vdpa_device *vdev); void (*get_config)(struct vdpa_device *vdev, unsigned int offset, void *buf, unsigned int len); @@ -266,7 +282,7 @@ struct vdpa_config_ops { /* DMA ops */ int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb); int (*dma_map)(struct vdpa_device *vdev, u64 iova, u64 size, - u64 pa, u32 perm); + u64 pa, u32 perm, void *opaque); int (*dma_unmap)(struct vdpa_device *vdev, u64 iova, u64 size); /* Free device resources */ @@ -275,7 +291,8 @@ struct vdpa_config_ops { struct vdpa_device *__vdpa_alloc_device(struct device *parent, const struct vdpa_config_ops *config, - size_t size, const char *name); + size_t size, const char *name, + bool use_va); /** * vdpa_alloc_device - allocate and initilaize a vDPA device @@ -285,15 +302,16 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent, * @parent: the parent device * @config: the bus operations that is supported by this device * @name: name of the vdpa device + * @use_va: indicate whether virtual address must be used by this device * * Return allocated data structure or ERR_PTR upon error */ -#define vdpa_alloc_device(dev_struct, member, parent, config, name) \ +#define vdpa_alloc_device(dev_struct, member, parent, config, name, use_va) \ container_of(__vdpa_alloc_device( \ parent, config, \ sizeof(dev_struct) + \ BUILD_BUG_ON_ZERO(offsetof( \ - dev_struct, member)), name), \ + dev_struct, member)), name, use_va), \ dev_struct, member) int vdpa_register_device(struct vdpa_device *vdev, int nvqs); @@ -348,27 +366,27 @@ static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev) return vdev->dma_dev; } -static inline void vdpa_reset(struct vdpa_device *vdev) +static inline int vdpa_reset(struct vdpa_device *vdev) { - const struct vdpa_config_ops *ops = vdev->config; + const struct vdpa_config_ops *ops = vdev->config; vdev->features_valid = false; - ops->set_status(vdev, 0); + return ops->reset(vdev); } static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features) { - const struct vdpa_config_ops *ops = vdev->config; + const struct vdpa_config_ops *ops = vdev->config; vdev->features_valid = true; - return ops->set_features(vdev, features); + return ops->set_features(vdev, features); } - -static inline void vdpa_get_config(struct vdpa_device *vdev, unsigned offset, - void *buf, unsigned int len) +static inline void vdpa_get_config(struct vdpa_device *vdev, + unsigned int offset, void *buf, + unsigned int len) { - const struct vdpa_config_ops *ops = vdev->config; + const struct vdpa_config_ops *ops = vdev->config; /* * Config accesses aren't supposed to trigger before features are set. |