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authorLinus Torvalds <torvalds@linux-foundation.org>2021-05-05 23:31:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-05 23:31:39 +0300
commit16bb86b5569cb7489367101f6ed69b25682b47db (patch)
tree4b0ec63032cb93491d65fc5766243bfc7ff60346 /include
parent57151b502cbc0fa6ff9074a76883fa9d9eda322e (diff)
parentd7bce85aa7b92b5de8f69b3bcedfe51d7b1aabe1 (diff)
downloadlinux-16bb86b5569cb7489367101f6ed69b25682b47db.tar.xz
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin: "A bunch of new drivers including vdpa support for block and virtio-vdpa. Beginning of vq kick (aka doorbell) mapping support. Misc fixes" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (40 commits) virtio_pci_modern: correct sparse tags for notify virtio_pci_modern: __force cast the notify mapping vDPA/ifcvf: get_config_size should return dev specific config size vDPA/ifcvf: enable Intel C5000X-PL virtio-block for vDPA vDPA/ifcvf: deduce VIRTIO device ID when probe vdpa_sim_blk: add support for vdpa management tool vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID vdpa_sim_blk: implement ramdisk behaviour vdpa: add vdpa simulator for block device vhost/vdpa: Remove the restriction that only supports virtio-net devices vhost/vdpa: use get_config_size callback in vhost_vdpa_config_validate() vdpa: add get_config_size callback in vdpa_config_ops vdpa_sim: cleanup kiovs in vdpasim_free() vringh: add vringh_kiov_length() helper vringh: implement vringh_kiov_advance() vringh: explain more about cleaning riov and wiov vringh: reset kiov 'consumed' field in __vringh_iov() vringh: add 'iotlb_lock' to synchronize iotlb accesses vdpa_sim: use iova module to allocate IOVA addresses vDPA/ifcvf: deduce VIRTIO device ID from pdev ids ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/vdpa.h42
-rw-r--r--include/linux/virtio_pci_modern.h11
-rw-r--r--include/linux/vringh.h19
3 files changed, 45 insertions, 27 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 15fa085fab05..f311d227aa1b 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -8,7 +8,7 @@
#include <linux/vhost_iotlb.h>
/**
- * vDPA callback definition.
+ * struct vdpa_calllback - vDPA callback definition.
* @callback: interrupt callback function
* @private: the data passed to the callback function
*/
@@ -18,7 +18,7 @@ struct vdpa_callback {
};
/**
- * vDPA notification area
+ * struct vdpa_notification_area - vDPA notification area
* @addr: base address of the notification area
* @size: size of the notification area
*/
@@ -28,7 +28,7 @@ struct vdpa_notification_area {
};
/**
- * vDPA vq_state definition
+ * struct vdpa_vq_state - vDPA vq_state definition
* @avail_index: available index
*/
struct vdpa_vq_state {
@@ -38,7 +38,7 @@ struct vdpa_vq_state {
struct vdpa_mgmt_dev;
/**
- * vDPA device - representation of a vDPA device
+ * struct vdpa_device - representation of a vDPA device
* @dev: underlying device
* @dma_dev: the actual device that is performing DMA
* @config: the configuration ops for this device.
@@ -59,7 +59,7 @@ struct vdpa_device {
};
/**
- * vDPA IOVA range - the IOVA range support by the device
+ * struct vdpa_iova_range - the IOVA range support by the device
* @first: start of the IOVA range
* @last: end of the IOVA range
*/
@@ -69,7 +69,7 @@ struct vdpa_iova_range {
};
/**
- * vDPA_config_ops - operations for configuring a vDPA device.
+ * 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
* list.
@@ -150,6 +150,9 @@ struct vdpa_iova_range {
* @set_status: Set the device status
* @vdev: vdpa device
* @status: virtio device status
+ * @get_config_size: Get the size of the configuration space
+ * @vdev: vdpa device
+ * Returns size_t: configuration size
* @get_config: Read from device specific configuration space
* @vdev: vdpa device
* @offset: offset from the beginning of
@@ -231,6 +234,7 @@ 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);
+ size_t (*get_config_size)(struct vdpa_device *vdev);
void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
void *buf, unsigned int len);
void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
@@ -267,7 +271,7 @@ int _vdpa_register_device(struct vdpa_device *vdev, int nvqs);
void _vdpa_unregister_device(struct vdpa_device *vdev);
/**
- * vdpa_driver - operations for a vDPA driver
+ * struct vdpa_driver - operations for a vDPA driver
* @driver: underlying device driver
* @probe: the function to call when a device is found. Returns 0 or -errno.
* @remove: the function to call when a device is removed.
@@ -344,18 +348,18 @@ static inline void vdpa_get_config(struct vdpa_device *vdev, unsigned offset,
}
/**
- * vdpa_mgmtdev_ops - vdpa device ops
- * @dev_add: Add a vdpa device using alloc and register
- * @mdev: parent device to use for device addition
- * @name: name of the new vdpa device
- * Driver need to add a new device using _vdpa_register_device()
- * after fully initializing the vdpa device. Driver must return 0
- * on success or appropriate error code.
- * @dev_del: Remove a vdpa device using unregister
- * @mdev: parent device to use for device removal
- * @dev: vdpa device to remove
- * Driver need to remove the specified device by calling
- * _vdpa_unregister_device().
+ * struct vdpa_mgmtdev_ops - vdpa device ops
+ * @dev_add: Add a vdpa device using alloc and register
+ * @mdev: parent device to use for device addition
+ * @name: name of the new vdpa device
+ * Driver need to add a new device using _vdpa_register_device()
+ * after fully initializing the vdpa device. Driver must return 0
+ * on success or appropriate error code.
+ * @dev_del: Remove a vdpa device using unregister
+ * @mdev: parent device to use for device removal
+ * @dev: vdpa device to remove
+ * Driver need to remove the specified device by calling
+ * _vdpa_unregister_device().
*/
struct vdpa_mgmtdev_ops {
int (*dev_add)(struct vdpa_mgmt_dev *mdev, const char *name);
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index f26acbeec965..6a95b58fd0f4 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -13,6 +13,8 @@ struct virtio_pci_modern_device {
void __iomem *device;
/* Base of vq notifications (non-legacy mode). */
void __iomem *notify_base;
+ /* Physical base of vq notifications */
+ resource_size_t notify_pa;
/* Where to read and clear interrupt */
u8 __iomem *isr;
@@ -99,13 +101,8 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
u16 idx);
u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
- u16 idx);
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
- size_t minlen,
- u32 align,
- u32 start, u32 size,
- size_t *len);
+void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+ u16 index, resource_size_t *pa);
int vp_modern_probe(struct virtio_pci_modern_device *mdev);
void vp_modern_remove(struct virtio_pci_modern_device *mdev);
#endif
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 59bd50f99291..84db7b8f912f 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -46,6 +46,9 @@ struct vringh {
/* IOTLB for this vring */
struct vhost_iotlb *iotlb;
+ /* spinlock to synchronize IOTLB accesses */
+ spinlock_t *iotlb_lock;
+
/* The function to call to notify the guest about added buffers */
void (*notify)(struct vringh *);
};
@@ -196,6 +199,19 @@ static inline void vringh_kiov_cleanup(struct vringh_kiov *kiov)
kiov->iov = NULL;
}
+static inline size_t vringh_kiov_length(struct vringh_kiov *kiov)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = kiov->i; i < kiov->used; i++)
+ len += kiov->iov[i].iov_len;
+
+ return len;
+}
+
+void vringh_kiov_advance(struct vringh_kiov *kiov, size_t len);
+
int vringh_getdesc_kern(struct vringh *vrh,
struct vringh_kiov *riov,
struct vringh_kiov *wiov,
@@ -258,7 +274,8 @@ static inline __virtio64 cpu_to_vringh64(const struct vringh *vrh, u64 val)
#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
-void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb);
+void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb,
+ spinlock_t *iotlb_lock);
int vringh_init_iotlb(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,