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virtio: fatures, fixes

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A huge patchset supporting vq resize using the
 new vq reset capability.
 Features, fixes, cleanups all over the place.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio updates from Michael Tsirkin:

 - A huge patchset supporting vq resize using the new vq reset
   capability

 - Features, fixes, and cleanups all over the place

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (88 commits)
  vdpa/mlx5: Fix possible uninitialized return value
  vdpa_sim_blk: add support for discard and write-zeroes
  vdpa_sim_blk: add support for VIRTIO_BLK_T_FLUSH
  vdpa_sim_blk: make vdpasim_blk_check_range usable by other requests
  vdpa_sim_blk: check if sector is 0 for commands other than read or write
  vdpa_sim: Implement suspend vdpa op
  vhost-vdpa: uAPI to suspend the device
  vhost-vdpa: introduce SUSPEND backend feature bit
  vdpa: Add suspend operation
  virtio-blk: Avoid use-after-free on suspend/resume
  virtio_vdpa: support the arg sizes of find_vqs()
  vhost-vdpa: Call ida_simple_remove() when failed
  vDPA: fix 'cast to restricted le16' warnings in vdpa.c
  vDPA: !FEATURES_OK should not block querying device config space
  vDPA/ifcvf: support userspace to query features and MQ of a management device
  vDPA/ifcvf: get_config_size should return a value no greater than dev implementation
  vhost scsi: Allow user to control num virtqueues
  vhost-scsi: Fix max number of virtqueues
  vdpa/mlx5: Support different address spaces for control and data
  vdpa/mlx5: Implement susupend virtqueue callback
  ...
This commit is contained in:
Linus Torvalds 2022-08-12 09:50:34 -07:00
commit 7a53e17acc
51 changed files with 2171 additions and 556 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/linux/mlx5/mlx5_ifc_vdpa.h
View file

@ -150,6 +150,14 @@ enum {
MLX5_VIRTIO_NET_Q_OBJECT_STATE_ERR = 0x3,
};
/* This indicates that the object was not created or has already
* been desroyed. It is very safe to assume that this object will never
* have so many states
*/
enum {
MLX5_VIRTIO_NET_Q_OBJECT_NONE = 0xffffffff
};
enum {
MLX5_RQTC_LIST_Q_TYPE_RQ = 0x0,
MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q = 0x1,

4
include/linux/remoteproc.h
View file

@ -597,7 +597,7 @@ struct rproc_subdev {
/**
* struct rproc_vring - remoteproc vring state
* @va: virtual address
* @len: length, in bytes
* @num: vring size
* @da: device address
* @align: vring alignment
* @notifyid: rproc-specific unique vring index
@ -606,7 +606,7 @@ struct rproc_subdev {
*/
struct rproc_vring {
void *va;
int len;
int num;
u32 da;
u32 align;
int notifyid;

4
include/linux/vdpa.h
View file

@ -218,6 +218,9 @@ struct vdpa_map_file {
* @reset: Reset device
* @vdev: vdpa device
* Returns integer: success (0) or error (< 0)
* @suspend: Suspend or resume the device (optional)
* @vdev: vdpa device
* Returns integer: success (0) or error (< 0)
* @get_config_size: Get the size of the configuration space includes
* fields that are conditional on feature bits.
* @vdev: vdpa device
@ -319,6 +322,7 @@ struct vdpa_config_ops {
u8 (*get_status)(struct vdpa_device *vdev);
void (*set_status)(struct vdpa_device *vdev, u8 status);
int (*reset)(struct vdpa_device *vdev);
int (*suspend)(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);

10
include/linux/virtio.h
View file

@ -19,6 +19,8 @@
* @priv: a pointer for the virtqueue implementation to use.
* @index: the zero-based ordinal number for this queue.
* @num_free: number of elements we expect to be able to fit.
* @num_max: the maximum number of elements supported by the device.
* @reset: vq is in reset state or not.
*
* A note on @num_free: with indirect buffers, each buffer needs one
* element in the queue, otherwise a buffer will need one element per
@ -31,7 +33,9 @@ struct virtqueue {
struct virtio_device *vdev;
unsigned int index;
unsigned int num_free;
unsigned int num_max;
void *priv;
bool reset;
};
int virtqueue_add_outbuf(struct virtqueue *vq,
@ -89,6 +93,9 @@ dma_addr_t virtqueue_get_desc_addr(struct virtqueue *vq);
dma_addr_t virtqueue_get_avail_addr(struct virtqueue *vq);
dma_addr_t virtqueue_get_used_addr(struct virtqueue *vq);
int virtqueue_resize(struct virtqueue *vq, u32 num,
void (*recycle)(struct virtqueue *vq, void *buf));
/**
* virtio_device - representation of a device using virtio
* @index: unique position on the virtio bus
@ -133,6 +140,9 @@ bool is_virtio_device(struct device *dev);
void virtio_break_device(struct virtio_device *dev);
void __virtio_unbreak_device(struct virtio_device *dev);
void __virtqueue_break(struct virtqueue *_vq);
void __virtqueue_unbreak(struct virtqueue *_vq);
void virtio_config_changed(struct virtio_device *dev);
#ifdef CONFIG_PM_SLEEP
int virtio_device_freeze(struct virtio_device *dev);

40
include/linux/virtio_config.h
View file

@ -55,6 +55,7 @@ struct virtio_shm_region {
* 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
* sizes: array of virtqueue sizes
* Returns 0 on success or error status
* @del_vqs: free virtqueues found by find_vqs().
* @synchronize_cbs: synchronize with the virtqueue callbacks (optional)
@ -78,6 +79,18 @@ struct virtio_shm_region {
* @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.
* @disable_vq_and_reset: reset a queue individually (optional).
* vq: the virtqueue
* Returns 0 on success or error status
* disable_vq_and_reset will guarantee that the callbacks are disabled and
* synchronized.
* Except for the callback, the caller should guarantee that the vring is
* not accessed by any functions of virtqueue.
* @enable_vq_after_reset: enable a reset queue
* vq: the virtqueue
* Returns 0 on success or error status
* If disable_vq_and_reset is set, then enable_vq_after_reset must also be
* set.
*/
typedef void vq_callback_t(struct virtqueue *);
struct virtio_config_ops {
@ -91,7 +104,9 @@ struct virtio_config_ops {
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,
const char * const names[],
u32 sizes[],
const bool *ctx,
struct irq_affinity *desc);
void (*del_vqs)(struct virtio_device *);
void (*synchronize_cbs)(struct virtio_device *);
@ -104,6 +119,8 @@ struct virtio_config_ops {
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);
};
/* If driver didn't advertise the feature, it will never appear. */
@ -198,7 +215,7 @@ struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev,
const char *names[] = { n };
struct virtqueue *vq;
int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL,
NULL);
NULL, NULL);
if (err < 0)
return ERR_PTR(err);
return vq;
@ -210,7 +227,8 @@ int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
const char * const names[],
struct irq_affinity *desc)
{
return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, desc);
return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL,
NULL, desc);
}
static inline
@ -219,8 +237,20 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs,
const char * const names[], const bool *ctx,
struct irq_affinity *desc)
{
return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, ctx,
desc);
return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL,
ctx, desc);
}
static inline
int virtio_find_vqs_ctx_size(struct virtio_device *vdev, u32 nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
const char * const names[],
u32 sizes[],
const bool *ctx, struct irq_affinity *desc)
{
return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, sizes,
ctx, desc);
}
/**

9
include/linux/virtio_pci_modern.h
View file

@ -5,6 +5,13 @@
#include <linux/pci.h>
#include <linux/virtio_pci.h>
struct virtio_pci_modern_common_cfg {
struct virtio_pci_common_cfg cfg;
__le16 queue_notify_data; /* read-write */
__le16 queue_reset; /* read-write */
};
struct virtio_pci_modern_device {
struct pci_dev *pci_dev;
@ -106,4 +113,6 @@ 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);
int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
#endif

10
include/linux/virtio_ring.h
View file

@ -76,16 +76,6 @@ struct virtqueue *vring_create_virtqueue(unsigned int index,
void (*callback)(struct virtqueue *vq),
const char *name);
/* Creates a virtqueue with a custom layout. */
struct virtqueue *__vring_new_virtqueue(unsigned int index,
struct vring vring,
struct virtio_device *vdev,
bool weak_barriers,
bool ctx,
bool (*notify)(struct virtqueue *),
void (*callback)(struct virtqueue *),
const char *name);
/*
* Creates a virtqueue with a standard layout but a caller-allocated
* ring.