summaryrefslogtreecommitdiff
path: root/drivers
AgeCommit message (Collapse)AuthorFilesLines
2022-08-11vdpa/mlx5: Implement susupend virtqueue callbackEli Cohen1-3/+80
Implement the suspend callback allowing to suspend the virtqueues so they stop processing descriptors. This is required to allow to query a consistent state of the virtqueue while live migration is taking place. Signed-off-by: Eli Cohen <elic@nvidia.com> Message-Id: <20220714113927.85729-2-elic@nvidia.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11vduse: Support querying information of IOVA regionsXie Yongji1-0/+39
This introduces a new ioctl: VDUSE_IOTLB_GET_INFO to support querying some information of IOVA regions. Now it can be used to query whether the IOVA region supports userspace memory registration. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Message-Id: <20220803045523.23851-6-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vduse: Support registering userspace memory for IOVA regionsXie Yongji1-0/+141
Introduce two ioctls: VDUSE_IOTLB_REG_UMEM and VDUSE_IOTLB_DEREG_UMEM to support registering and de-registering userspace memory for IOVA regions. Now it only supports registering userspace memory for bounce buffer region in virtio-vdpa case. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220803045523.23851-5-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11vduse: Support using userspace pages as bounce bufferXie Yongji2-8/+96
Introduce two APIs: vduse_domain_add_user_bounce_pages() and vduse_domain_remove_user_bounce_pages() to support adding and removing userspace pages for bounce buffers. During adding and removing, the DMA data would be copied from the kernel bounce pages to the userspace bounce pages and back. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220803045523.23851-4-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11vduse: Use memcpy_{to,from}_page() in do_bounce()Xie Yongji1-5/+4
kmap_atomic() is being deprecated in favor of kmap_local_page(). The use of kmap_atomic() in do_bounce() is all thread local therefore kmap_local_page() is a sufficient replacement. Convert to kmap_local_page() but, instead of open coding it, use the helpers memcpy_to_page() and memcpy_from_page(). Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Message-Id: <20220803045523.23851-3-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11vduse: Remove unnecessary spin lock protectionXie Yongji1-5/+2
Now we use domain->iotlb_lock to protect two different variables: domain->bounce_maps->bounce_page and domain->iotlb. But for domain->bounce_maps->bounce_page, we actually don't need any synchronization between vduse_domain_get_bounce_page() and vduse_domain_free_bounce_pages() since vduse_domain_get_bounce_page() will only be called in page fault handler and vduse_domain_free_bounce_pages() will be called during file release. So let's remove the unnecessary spin lock protection in vduse_domain_get_bounce_page(). Then the usage of domain->iotlb_lock could be more clear: the lock will be only used to protect the domain->iotlb. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220803045523.23851-2-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11net: virtio_net: notifications coalescing supportAlvaro Karsz1-15/+96
New VirtIO network feature: VIRTIO_NET_F_NOTF_COAL. Control a Virtio network device notifications coalescing parameters using the control virtqueue. A device that supports this fetature can receive VIRTIO_NET_CTRL_NOTF_COAL control commands. - VIRTIO_NET_CTRL_NOTF_COAL_TX_SET: Ask the network device to change the following parameters: - tx_usecs: Maximum number of usecs to delay a TX notification. - tx_max_packets: Maximum number of packets to send before a TX notification. - VIRTIO_NET_CTRL_NOTF_COAL_RX_SET: Ask the network device to change the following parameters: - rx_usecs: Maximum number of usecs to delay a RX notification. - rx_max_packets: Maximum number of packets to receive before a RX notification. VirtIO spec. patch: https://lists.oasis-open.org/archives/virtio-comment/202206/msg00100.html Signed-off-by: Alvaro Karsz <alvaro.karsz@solid-run.com> Message-Id: <20220718091102.498774-1-alvaro.karsz@solid-run.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11virtio: Check dev_set_name() return valueBo Liu1-1/+3
It's possible that dev_set_name() returns -ENOMEM, catch and handle this. Signed-off-by: Bo Liu <liubo03@inspur.com> Message-Id: <20220707031751.4802-1-liubo03@inspur.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vDPA/ifcvf: remove duplicated assignment to pointer cfgColin Ian King1-1/+0
The assignment to pointer cfg is duplicated, the second assignment is redundant and can be removed. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Message-Id: <20220704190456.593464-1-colin.i.king@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vdpa: ifcvf: Fix spelling mistake in commentsZhang Jiaming1-1/+1
There is a typo(does't) in comments. It maybe 'doesn't' instead of 'does't'. Signed-off-by: Zhang Jiaming <jiaming@nfschina.com> Message-Id: <20220704024104.15535-1-jiaming@nfschina.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vdpa/mlx5: Use eth_broadcast_addr() to assign broadcast addressXu Qiang1-1/+1
Using eth_broadcast_addr() to assign broadcast address instead of memset(). Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Xu Qiang <xuqiang36@huawei.com> Message-Id: <20220704021405.64545-1-xuqiang36@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vdpa_sim: use max_iotlb_entries as a limit in vhost_iotlb_initStefano Garzarella1-2/+2
Commit bda324fd037a ("vdpasim: control virtqueue support") changed the allocation of iotlbs calling vhost_iotlb_init() for each address space, instead of vhost_iotlb_alloc(). With this change we forgot to use the limit we had introduced with the `max_iotlb_entries` module parameter. Fixes: bda324fd037a ("vdpasim: control virtqueue support") Cc: gautam.dawar@xilinx.com Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220621151208.189959-1-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Eugenio Pérez <eperezma@redhat.com>
2022-08-11vdpa_sim_blk: set number of address spaces and virtqueue groupsStefano Garzarella1-0/+6
Commit bda324fd037a ("vdpasim: control virtqueue support") added two new fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to initialize them for vdpa_sim_blk. When creating a new vdpa_sim_blk device this causes the kernel to panic in this way:    $ vdpa dev add mgmtdev vdpasim_blk name blk0    BUG: kernel NULL pointer dereference, address: 0000000000000030    ...    RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb]    ...    Call Trace:     <TASK>     vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb]     vdpasim_map_range+0x91/0xd0 [vdpa_sim]     vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim]     ... This happens because vdpasim->iommu[0] is not initialized when dev_attr.nas is 0. Let's fix this issue by initializing both (nas, ngroups) to 1 for vdpa_sim_blk. Fixes: bda324fd037a ("vdpasim: control virtqueue support") Cc: gautam.dawar@xilinx.com Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220621151323.190431-1-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Eugenio Pérez <eperezma@redhat.com>
2022-08-11vdpa_sim_blk: call vringh_complete_iotlb() also in the error pathStefano Garzarella1-5/+9
Call vringh_complete_iotlb() even when we encounter a serious error that prevents us from writing the status in the "in" header (e.g. the header length is incorrect, etc.). The guest is misbehaving, so maybe the ring is in a bad state, but let's avoid making things worse. Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220630153221.83371-4-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11vdpa_sim_blk: limit the number of request handled per batchStefano Garzarella1-0/+10
Limit the number of requests (4 per queue as for vdpa_sim_net) handled in a batch to prevent the worker from using the CPU for too long. Suggested-by: Eugenio Pérez <eperezma@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220630153221.83371-3-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-08-11vdpa_sim_blk: use dev_dbg() to print errorsStefano Garzarella1-10/+10
Use dev_dbg() instead of dev_err()/dev_warn() to avoid flooding the host with prints, when the guest driver is misbehaving. In this way, prints can be dynamically enabled when the vDPA block simulator is used to validate a driver. Suggested-by: Jason Wang <jasowang@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220630153221.83371-2-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: support set_ringparamXuan Zhuo1-0/+48
Support set_ringparam based on virtio queue reset. Users can use ethtool -G eth0 <ring_num> to modify the ring size of virtio-net. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-43-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: support tx queue resizeXuan Zhuo1-0/+50
This patch implements the resize function of the tx queues. Based on this function, it is possible to modify the ring num of the queue. Inludes fixup: virtio_net: fix for stuck when change tx ring size with dev down When dev is set to DOWN state, napi has been disabled, if we modify the ring size at this time, we should not call napi_disable() again, which will cause stuck. And all operations are under the protection of rtnl_lock, so there is no need to consider concurrency issues. Message-Id: <20220801063902.129329-42-xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220811080258.79398-3-xuanzhuo@linux.alibaba.com> Reported-by: Kangjie Xu <kangjie.xu@linux.alibaba.com> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: support rx queue resizeXuan Zhuo1-0/+25
This patch implements the resize function of the rx queues. Based on this function, it is possible to modify the ring num of the queue. Includes fixup: virtio_net: fix for stuck when change rx ring size with dev down When dev is set to DOWN state, napi has been disabled, if we modify the ring size at this time, we should not call napi_disable() again, which will cause stuck. And all operations are under the protection of rtnl_lock, so there is no need to consider concurrency issues. Message-Id: <20220801063902.129329-41-xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220811080258.79398-2-xuanzhuo@linux.alibaba.com> Reported-by: Kangjie Xu <kangjie.xu@linux.alibaba.com> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: split free_unused_bufs()Xuan Zhuo1-16/+25
This patch separates two functions for freeing sq buf and rq buf from free_unused_bufs(). When supporting the enable/disable tx/rq queue in the future, it is necessary to support separate recovery of a sq buf or a rq buf. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-40-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: get ringparam by virtqueue_get_vring_max_size()Xuan Zhuo1-4/+4
Use virtqueue_get_vring_max_size() in virtnet_get_ringparam() to set tx,rx_max_pending. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-39-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_net: set the default max ring size by find_vqs()Xuan Zhuo1-4/+38
Use virtio_find_vqs_ctx_size() to specify the maximum ring size of tx, rx at the same time. | rx/tx ring size ------------------------------------------- speed == UNKNOWN or < 10G| 1024 speed < 40G | 4096 speed >= 40G | 8192 Call virtnet_update_settings() once before calling init_vqs() to update speed. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-38-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_mmio: support the arg sizes of find_vqs()Xuan Zhuo1-2/+6
Virtio MMIO support the new parameter sizes of find_vqs(). Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-36-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_pci: support the arg sizes of find_vqs()Xuan Zhuo4-12/+23
Virtio PCI supports new parameter sizes of find_vqs(). Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-35-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio: find_vqs() add arg sizesXuan Zhuo8-4/+12
find_vqs() adds a new parameter sizes to specify the size of each vq vring. NULL as sizes means that all queues in find_vqs() use the maximum size. A value in the array is 0, which means that the corresponding queue uses the maximum size. In the split scenario, the meaning of size is the largest size, because it may be limited by memory, the virtio core will try a smaller size. And the size is power of 2. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-34-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_pci: support VIRTIO_F_RING_RESETXuan Zhuo2-3/+97
This patch implements virtio pci support for QUEUE RESET. Performing reset on a queue is divided into these steps: 1. notify the device to reset the queue 2. recycle the buffer submitted 3. reset the vring (may re-alloc) 4. mmap vring to device, and enable the queue This patch implements virtio_reset_vq(), virtio_enable_resetq() in the pci scenario. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-33-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_pci: extract the logic of active vq for modern pciXuan Zhuo1-18/+28
Introduce vp_active_vq() to configure vring to backend after vq attach vring. And configure vq vector if necessary. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-32-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_pci: introduce helper to get/set queue resetXuan Zhuo1-0/+39
Introduce new helpers to implement queue reset and get queue reset status. https://github.com/oasis-tcs/virtio-spec/issues/124 https://github.com/oasis-tcs/virtio-spec/issues/139 Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-31-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: struct virtqueue introduce resetXuan Zhuo1-0/+2
Introduce a new member reset to the structure virtqueue to determine whether the current vq is in the reset state. Subsequent patches will use it. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-29-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio: allow to unbreak/break virtqueue individuallyXuan Zhuo1-0/+24
This patch allows the new introduced __virtqueue_break()/__virtqueue_unbreak() to break/unbreak the virtqueue. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-27-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: introduce virtqueue_resize()Xuan Zhuo1-0/+69
Introduce virtqueue_resize() to implement the resize of vring. Based on these, the driver can dynamically adjust the size of the vring. For example: ethtool -G. virtqueue_resize() implements resize based on the vq reset function. In case of failure to allocate a new vring, it will give up resize and use the original vring. During this process, if the re-enable reset vq fails, the vq can no longer be used. Although the probability of this situation is not high. The parameter recycle is used to recycle the buffer that is no longer used. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-25-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: introduce virtqueue_resize_packed()Xuan Zhuo1-0/+30
virtio ring packed supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, re-initialize(by virtqueue_reinit_packed()) the virtqueue to ensure that the vring can be used. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-24-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: introduce virtqueue_reinit_packed()Xuan Zhuo1-0/+12
Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-23-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: extract the logic of attach vringXuan Zhuo1-15/+10
Separate the logic of attach vring, the subsequent patch will call it separately. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-22-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: extract the logic of vring initXuan Zhuo1-11/+17
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of packed vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-21-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: extract the logic of alloc state and extraXuan Zhuo1-14/+34
Separate the logic for alloc desc_state and desc_extra, which will be called separately by subsequent patches. Use struct vring_packed to pass desc_state, desc_extra. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-20-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: extract the logic of alloc queueXuan Zhuo1-29/+51
Separate the logic of packed to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-19-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: packed: introduce vring_free_packedXuan Zhuo1-0/+22
Free the structure struct vring_vritqueue_packed. Subsequent patches require it. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-18-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: introduce virtqueue_resize_split()Xuan Zhuo1-0/+34
virtio ring split supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, re-initialize(virtqueue_reinit_split()) the virtqueue to ensure that the vring can be used. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-17-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: reserve vring_align, may_reduce_numXuan Zhuo1-0/+10
In vring_alloc_queue_split() save vring_align, may_reduce_num to structure vring_virtqueue_split. Used to create a new vring when implementing resize. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-16-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: introduce virtqueue_reinit_split()Xuan Zhuo1-0/+23
Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-15-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: extract the logic of attach vringXuan Zhuo1-13/+10
Separate the logic of attach vring, subsequent patches will call it separately. virtqueue_vring_init_split() completes the initialization of other variables of vring split. We can directly use vq->split = *vring_split to complete attach. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-14-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: extract the logic of vring initXuan Zhuo1-10/+21
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of split vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-13-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: extract the logic of alloc state and extraXuan Zhuo1-16/+36
Separate the logic of creating desc_state, desc_extra, and subsequent patches will call it independently. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-12-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: extract the logic of alloc queueXuan Zhuo1-25/+40
Separate the logic of split to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-11-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: introduce vring_free_split()Xuan Zhuo1-0/+11
Free the structure struct vring_vritqueue_split. Subsequent patches require it. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-10-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: __vring_new_virtqueue() accept struct vring_virtqueue_splitXuan Zhuo1-14/+15
__vring_new_virtqueue() instead accepts struct vring_virtqueue_split. The purpose of this is to pass more information into __vring_new_virtqueue() to make the code simpler and the structure cleaner. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-9-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split: stop __vring_new_virtqueue as export symbolXuan Zhuo1-9/+16
There is currently only one place to reference __vring_new_virtqueue() directly from the outside of virtio core. And here vring_new_virtqueue() can be used instead. Subsequent patches will modify __vring_new_virtqueue, so stop it as an export symbol for now. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-8-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: introduce virtqueue_init()Xuan Zhuo1-16/+22
Separate the logic of virtqueue initialization. These variables should be reset during reset. This logic can be called independently when implementing resize/reset later. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-7-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11virtio_ring: split vring_virtqueueXuan Zhuo1-56/+60
Separate the two inline structures(split and packed) from the structure vring_virtqueue. In this way, we can use these two structures later to pass parameters and retain temporary variables. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-6-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-25 00:05:07 +0300