From 48cd6bc5b22d68b8bbc8601f3c7ddeed99541a0b Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sat, 18 Feb 2023 09:10:31 +0100 Subject: virtio: Reorder fields in 'struct virtqueue' Group some variables based on their sizes to reduce hole and avoid padding. On x86_64, this shrinks the size of 'struct virtqueue' from 72 to 68 bytes. It saves a few bytes of memory. Signed-off-by: Christophe JAILLET Message-Id: <8f3d2e49270a2158717e15008e7ed7228196ba02.1676707807.git.christophe.jaillet@wanadoo.fr> Signed-off-by: Michael S. Tsirkin Acked-by: Peter Lafreniere Reviewed-by: Stefano Garzarella --- include/linux/virtio.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 2b472514c49b..d6e161aa532e 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -34,8 +34,8 @@ struct virtqueue { unsigned int index; unsigned int num_free; unsigned int num_max; - void *priv; bool reset; + void *priv; }; int virtqueue_add_outbuf(struct virtqueue *vq, -- cgit v1.2.3 From 4b6ec919b84830949313c805c586fb34f141ce0c Mon Sep 17 00:00:00 2001 From: Feng Liu Date: Fri, 10 Mar 2023 07:34:28 +0200 Subject: virtio_ring: Use const to annotate read-only pointer params Add const to make the read-only pointer parameters clear, similar to many existing functions. To implement this change, the commit also introduces the use of `container_of_const` to implement `to_vvq`, which ensures the const-ness of read-only parameters and avoids accidental modification of their members. Signed-off-by: Feng Liu Reviewed-by: Jiri Pirko Reviewed-by: Parav Pandit Reviewed-by: Gavin Li Reviewed-by: Bodong Wang Message-Id: <20230310053428.3376-4-feliu@nvidia.com> Signed-off-by: Michael S. Tsirkin --- include/linux/virtio.h | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/virtio.h b/include/linux/virtio.h index d6e161aa532e..b93238db94e3 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -84,14 +84,14 @@ bool virtqueue_enable_cb_delayed(struct virtqueue *vq); void *virtqueue_detach_unused_buf(struct virtqueue *vq); -unsigned int virtqueue_get_vring_size(struct virtqueue *vq); +unsigned int virtqueue_get_vring_size(const struct virtqueue *vq); -bool virtqueue_is_broken(struct virtqueue *vq); +bool virtqueue_is_broken(const struct virtqueue *vq); -const struct vring *virtqueue_get_vring(struct virtqueue *vq); -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); +const struct vring *virtqueue_get_vring(const struct virtqueue *vq); +dma_addr_t virtqueue_get_desc_addr(const struct virtqueue *vq); +dma_addr_t virtqueue_get_avail_addr(const struct virtqueue *vq); +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)); @@ -147,7 +147,7 @@ int virtio_device_restore(struct virtio_device *dev); #endif void virtio_reset_device(struct virtio_device *dev); -size_t virtio_max_dma_size(struct virtio_device *vdev); +size_t virtio_max_dma_size(const struct virtio_device *vdev); #define virtio_device_for_each_vq(vdev, vq) \ list_for_each_entry(vq, &vdev->vqs, list) -- cgit v1.2.3 From 1d24692732fb299c94b0dcc032b48ac8fa85c854 Mon Sep 17 00:00:00 2001 From: Xie Yongji Date: Thu, 23 Mar 2023 13:30:34 +0800 Subject: vdpa: Add set/get_vq_affinity callbacks in vdpa_config_ops This introduces set/get_vq_affinity callbacks in vdpa_config_ops to support virtqueue affinity management for vdpa device drivers. Signed-off-by: Xie Yongji Acked-by: Jason Wang Message-Id: <20230323053043.35-3-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin --- include/linux/vdpa.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/linux') diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 43f59ef10cc9..2313db735773 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -250,6 +250,15 @@ struct vdpa_map_file { * @vdev: vdpa device * Returns the iova range supported by * the device. + * @set_vq_affinity: Set the affinity of virtqueue (optional) + * @vdev: vdpa device + * @idx: virtqueue index + * @cpu_mask: the affinity mask + * Returns integer: success (0) or error (< 0) + * @get_vq_affinity: Get the affinity of virtqueue (optional) + * @vdev: vdpa device + * @idx: virtqueue index + * Returns the affinity mask * @set_group_asid: Set address space identifier for a * virtqueue group (optional) * @vdev: vdpa device @@ -340,6 +349,10 @@ struct vdpa_config_ops { const void *buf, unsigned int len); u32 (*get_generation)(struct vdpa_device *vdev); struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev); + int (*set_vq_affinity)(struct vdpa_device *vdev, u16 idx, + const struct cpumask *cpu_mask); + const struct cpumask *(*get_vq_affinity)(struct vdpa_device *vdev, + u16 idx); /* DMA ops */ int (*set_map)(struct vdpa_device *vdev, unsigned int asid, -- cgit v1.2.3 From 5e68470f4e80a4120e9ecec408f6ab4ad386bd4a Mon Sep 17 00:00:00 2001 From: Xie Yongji Date: Thu, 23 Mar 2023 13:30:40 +0800 Subject: vdpa: Add eventfd for the vdpa callback Add eventfd for the vdpa callback so that user can signal it directly instead of triggering the callback. It will be used for vhost-vdpa case. Signed-off-by: Xie Yongji Message-Id: <20230323053043.35-9-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang --- include/linux/vdpa.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 2313db735773..f2064fa2d2da 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -13,10 +13,16 @@ * struct vdpa_calllback - vDPA callback definition. * @callback: interrupt callback function * @private: the data passed to the callback function + * @trigger: the eventfd for the callback (Optional). + * When it is set, the vDPA driver must guarantee that + * signaling it is functional equivalent to triggering + * the callback. Then vDPA parent can signal it directly + * instead of triggering the callback. */ struct vdpa_callback { irqreturn_t (*callback)(void *data); void *private; + struct eventfd_ctx *trigger; }; /** -- cgit v1.2.3 From c618c84d4ccc6268c3da7609c7388b6cb305c639 Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Tue, 4 Apr 2023 15:13:18 +0200 Subject: vdpa: add bind_mm/unbind_mm callbacks These new optional callbacks is used to bind/unbind the device to a specific address space so the vDPA framework can use VA when these callbacks are implemented. Suggested-by: Jason Wang Acked-by: Jason Wang Signed-off-by: Stefano Garzarella Message-Id: <20230404131326.44403-2-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin --- include/linux/vdpa.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux') diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index f2064fa2d2da..2f1af73b3a1a 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -305,6 +305,14 @@ struct vdpa_map_file { * @vdev: vdpa device * @idx: virtqueue index * Returns pointer to structure device or error (NULL) + * @bind_mm: Bind the device to a specific address space + * so the vDPA framework can use VA when this + * callback is implemented. (optional) + * @vdev: vdpa device + * @mm: address space to bind + * @unbind_mm: Unbind the device from the address space + * bound using the bind_mm callback. (optional) + * @vdev: vdpa device * @free: Free resources that belongs to vDPA (optional) * @vdev: vdpa device */ @@ -370,6 +378,8 @@ struct vdpa_config_ops { int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group, unsigned int asid); struct device *(*get_vq_dma_dev)(struct vdpa_device *vdev, u16 idx); + int (*bind_mm)(struct vdpa_device *vdev, struct mm_struct *mm); + void (*unbind_mm)(struct vdpa_device *vdev); /* Free device resources */ void (*free)(struct vdpa_device *vdev); -- cgit v1.2.3 From 42823a871fd4e17b34034f43b36ae57bd2ed8a67 Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Tue, 4 Apr 2023 15:17:16 +0200 Subject: vringh: support VA with iotlb MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit vDPA supports the possibility to use user VA in the iotlb messages. So, let's add support for user VA in vringh to use it in the vDPA simulators. Acked-by: Eugenio Pérez Signed-off-by: Stefano Garzarella Message-Id: <20230404131716.45855-1-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin --- include/linux/vringh.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux') diff --git a/include/linux/vringh.h b/include/linux/vringh.h index 1991a02c6431..b4edfadf5479 100644 --- a/include/linux/vringh.h +++ b/include/linux/vringh.h @@ -32,6 +32,9 @@ struct vringh { /* Can we get away with weak barriers? */ bool weak_barriers; + /* Use user's VA */ + bool use_va; + /* Last available index we saw (ie. where we're up to). */ u16 last_avail_idx; @@ -284,6 +287,12 @@ int vringh_init_iotlb(struct vringh *vrh, u64 features, struct vring_avail *avail, struct vring_used *used); +int vringh_init_iotlb_va(struct vringh *vrh, u64 features, + unsigned int num, bool weak_barriers, + struct vring_desc *desc, + struct vring_avail *avail, + struct vring_used *used); + int vringh_getdesc_iotlb(struct vringh *vrh, struct vringh_kiov *riov, struct vringh_kiov *wiov, -- cgit v1.2.3 From 9be5d2d424a19a0c6d643a1baecba3d58e725012 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Fri, 31 Mar 2023 10:56:55 +0200 Subject: vdpa: address kdoc warnings This patch addresses the following minor kdoc problems. * Incorrect spelling of 'callback' and 'notification' * Unrecognised kdoc format for 'struct vdpa_map_file' * Missing documentation of 'get_vendor_vq_stats' member of 'struct vdpa_config_ops' * Missing documentation of 'max_supported_vqs' and 'supported_features' members of 'struct vdpa_mgmt_dev' Most of these problems were flagged by: $ ./scripts/kernel-doc -Werror -none include/linux/vdpa.h include/linux/vdpa.h:20: warning: expecting prototype for struct vdpa_calllback. Prototype was for struct vdpa_callback instead include/linux/vdpa.h:117: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Corresponding file area for device memory mapping include/linux/vdpa.h:357: warning: Function parameter or member 'get_vendor_vq_stats' not described in 'vdpa_config_ops' include/linux/vdpa.h:518: warning: Function parameter or member 'supported_features' not described in 'vdpa_mgmt_dev' include/linux/vdpa.h:518: warning: Function parameter or member 'max_supported_vqs' not described in 'vdpa_mgmt_dev' The misspelling of 'notification' was flagged by: $ ./scripts/checkpatch.pl --codespell --showfile --strict -f include/linux/vdpa.h include/linux/vdpa.h:171: CHECK: 'notifcation' may be misspelled - perhaps 'notification'? ... Signed-off-by: Simon Horman Message-Id: <20230331-vhost-fixes-v1-1-1f046e735b9e@kernel.org> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang --- include/linux/vdpa.h | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 2f1af73b3a1a..c0d3f5433af7 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -10,7 +10,7 @@ #include /** - * struct vdpa_calllback - vDPA callback definition. + * struct vdpa_callback - vDPA callback definition. * @callback: interrupt callback function * @private: the data passed to the callback function * @trigger: the eventfd for the callback (Optional). @@ -120,7 +120,7 @@ struct vdpa_dev_set_config { }; /** - * Corresponding file area for device memory mapping + * struct vdpa_map_file - file area for device memory mapping * @file: vma->vm_file for the mapping * @offset: mapping offset in the vm_file */ @@ -171,10 +171,16 @@ struct vdpa_map_file { * @vdev: vdpa device * @idx: virtqueue index * @state: pointer to returned state (last_avail_idx) + * @get_vendor_vq_stats: Get the vendor statistics of a device. + * @vdev: vdpa device + * @idx: virtqueue index + * @msg: socket buffer holding stats message + * @extack: extack for reporting error messages + * Returns integer: success (0) or error (< 0) * @get_vq_notification: Get the notification area for a virtqueue (optional) * @vdev: vdpa device * @idx: virtqueue index - * Returns the notifcation area + * Returns the notification area * @get_vq_irq: Get the irq number of a virtqueue (optional, * but must implemented if require vq irq offloading) * @vdev: vdpa device @@ -535,6 +541,8 @@ struct vdpa_mgmtdev_ops { * @config_attr_mask: bit mask of attributes of type enum vdpa_attr that * management device support during dev_add callback * @list: list entry + * @supported_features: features supported by device + * @max_supported_vqs: maximum number of virtqueues supported by device */ struct vdpa_mgmt_dev { struct device *device; -- cgit v1.2.3 From b2ffaa672edaf1a681537a9f47bc14ab6c9e8845 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Fri, 31 Mar 2023 10:56:56 +0200 Subject: vringh: address kdoc warnings Address some minor kdoc warnings in vring.h. * Place kdoc for 'struct vringh_config_ops' immediately before the structure * Add missing documentation of members of 'vringh_iov' and 'vringh_kiov' Warnings flagged by: $ ./scripts/kernel-doc -none include/linux/vringh.h include/linux/vringh.h:68: error: Cannot parse struct or union! include/linux/vringh.h:92: warning: Function parameter or member 'iov' not described in 'vringh_iov' include/linux/vringh.h:92: warning: Function parameter or member 'consumed' not described in 'vringh_iov' include/linux/vringh.h:92: warning: Function parameter or member 'i' not described in 'vringh_iov' include/linux/vringh.h:92: warning: Function parameter or member 'used' not described in 'vringh_iov' include/linux/vringh.h:92: warning: Function parameter or member 'max_num' not described in 'vringh_iov' include/linux/vringh.h:104: warning: Function parameter or member 'iov' not described in 'vringh_kiov' include/linux/vringh.h:104: warning: Function parameter or member 'consumed' not described in 'vringh_kiov' include/linux/vringh.h:104: warning: Function parameter or member 'i' not described in 'vringh_kiov' include/linux/vringh.h:104: warning: Function parameter or member 'used' not described in 'vringh_kiov' include/linux/vringh.h:104: warning: Function parameter or member 'max_num' not described in 'vringh_kiov' Signed-off-by: Simon Horman Message-Id: <20230331-vhost-fixes-v1-2-1f046e735b9e@kernel.org> Signed-off-by: Michael S. Tsirkin --- include/linux/vringh.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/vringh.h b/include/linux/vringh.h index b4edfadf5479..c3a8117dabe8 100644 --- a/include/linux/vringh.h +++ b/include/linux/vringh.h @@ -57,6 +57,9 @@ struct vringh { void (*notify)(struct vringh *); }; +struct virtio_device; +typedef void vrh_callback_t(struct virtio_device *, struct vringh *); + /** * struct vringh_config_ops - ops for creating a host vring from a virtio driver * @find_vrhs: find the host vrings and instantiate them @@ -68,8 +71,6 @@ struct vringh { * Returns 0 on success or error status * @del_vrhs: free the host vrings found by find_vrhs(). */ -struct virtio_device; -typedef void vrh_callback_t(struct virtio_device *, struct vringh *); struct vringh_config_ops { int (*find_vrhs)(struct virtio_device *vdev, unsigned nhvrs, struct vringh *vrhs[], vrh_callback_t *callbacks[]); @@ -84,6 +85,12 @@ struct vringh_range { /** * struct vringh_iov - iovec mangler. + * @iov: array of iovecs to operate on + * @consumed: number of bytes consumed within iov[i] + * @i: index of current iovec + * @used: number of iovecs present in @iov + * @max_num: maximum number of iovecs. + * corresponds to allocated memory of @iov * * Mangles iovec in place, and restores it. * Remaining data is iov + i, of used - i elements. @@ -96,6 +103,12 @@ struct vringh_iov { /** * struct vringh_kiov - kvec mangler. + * @iov: array of iovecs to operate on + * @consumed: number of bytes consumed within iov[i] + * @i: index of current iovec + * @used: number of iovecs present in @iov + * @max_num: maximum number of iovecs. + * corresponds to allocated memory of @iov * * Mangles kvec in place, and restores it. * Remaining data is iov + i, of used - i elements. -- cgit v1.2.3 From af8ececda185078c096852edb4e1d7a2349e6856 Mon Sep 17 00:00:00 2001 From: Viktor Prutyanov Date: Thu, 13 Apr 2023 11:18:54 +0300 Subject: virtio: add VIRTIO_F_NOTIFICATION_DATA feature support According to VirtIO spec v1.2, VIRTIO_F_NOTIFICATION_DATA feature indicates that the driver passes extra data along with the queue notifications. In a split queue case, the extra data is 16-bit available index. In a packed queue case, the extra data is 1-bit wrap counter and 15-bit available index. Add support for this feature for MMIO, channel I/O and modern PCI transports. Signed-off-by: Viktor Prutyanov Acked-by: Jason Wang Reviewed-by: Xuan Zhuo Message-Id: <20230413081855.36643-2-alvaro.karsz@solid-run.com> Signed-off-by: Michael S. Tsirkin --- include/linux/virtio_ring.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 8b95b69ef694..2550c9170f4f 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -117,4 +117,6 @@ void vring_del_virtqueue(struct virtqueue *vq); void vring_transport_features(struct virtio_device *vdev); irqreturn_t vring_interrupt(int irq, void *_vq); + +u32 vring_notification_data(struct virtqueue *_vq); #endif /* _LINUX_VIRTIO_RING_H */ -- cgit v1.2.3 From 2c4e4a22a3b090e06191f8544d21e0e1d72ce518 Mon Sep 17 00:00:00 2001 From: Alvaro Karsz Date: Thu, 13 Apr 2023 11:18:55 +0300 Subject: virtio-vdpa: add VIRTIO_F_NOTIFICATION_DATA feature support Add VIRTIO_F_NOTIFICATION_DATA support for vDPA transport. If this feature is negotiated, the driver passes extra data when kicking a virtqueue. A device that offers this feature needs to implement the kick_vq_with_data callback. kick_vq_with_data receives the vDPA device and data. data includes: 16 bits vqn and 16 bits next available index for split virtqueues. 16 bits vqs, 15 least significant bits of next available index and 1 bit next_wrap for packed virtqueues. This patch follows a patch [1] by Viktor Prutyanov which adds support for the MMIO, channel I/O and modern PCI transports. Signed-off-by: Alvaro Karsz Message-Id: <20230413081855.36643-3-alvaro.karsz@solid-run.com> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang --- include/linux/vdpa.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux') diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index c0d3f5433af7..db1b0eaef4eb 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -149,6 +149,14 @@ struct vdpa_map_file { * @kick_vq: Kick the virtqueue * @vdev: vdpa device * @idx: virtqueue index + * @kick_vq_with_data: Kick the virtqueue and supply extra data + * (only if VIRTIO_F_NOTIFICATION_DATA is negotiated) + * @vdev: vdpa device + * @data for split virtqueue: + * 16 bits vqn and 16 bits next available index. + * @data for packed virtqueue: + * 16 bits vqn, 15 least significant bits of + * next available index and 1 bit next_wrap. * @set_vq_cb: Set the interrupt callback function for * a virtqueue * @vdev: vdpa device @@ -329,6 +337,7 @@ struct vdpa_config_ops { u64 device_area); void (*set_vq_num)(struct vdpa_device *vdev, u16 idx, u32 num); void (*kick_vq)(struct vdpa_device *vdev, u16 idx); + void (*kick_vq_with_data)(struct vdpa_device *vdev, u32 data); void (*set_vq_cb)(struct vdpa_device *vdev, u16 idx, struct vdpa_callback *cb); void (*set_vq_ready)(struct vdpa_device *vdev, u16 idx, bool ready); -- cgit v1.2.3 From 38fc29ea754711e9a8c4e9ca2678ab41353a4662 Mon Sep 17 00:00:00 2001 From: Shunsuke Mie Date: Mon, 17 Apr 2023 11:20:36 +0900 Subject: virtio_ring: add a struct device forward declaration The virtio_ring header file uses the struct device without a forward declaration. Signed-off-by: Shunsuke Mie Message-Id: <20230417022037.917668-1-mie@igel.co.jp> Signed-off-by: Michael S. Tsirkin --- include/linux/virtio_ring.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 2550c9170f4f..9b33df741b63 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -58,6 +58,7 @@ do { \ struct virtio_device; struct virtqueue; +struct device; /* * Creates a virtqueue and allocates the descriptor ring. If -- cgit v1.2.3