- 11 Aug, 2022 40 commits
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Xuan Zhuo authored
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>
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Use virtqueue_get_vring_max_size() in virtnet_get_ringparam() to set tx,rx_max_pending. Signed-off-by:
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Xuan Zhuo authored
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 authored
Introduce helper virtio_find_vqs_ctx_size() to call find_vqs and specify the maximum size of each vq ring. Signed-off-by:
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Xuan Zhuo authored
Virtio MMIO support the new parameter sizes of find_vqs(). Signed-off-by:
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Xuan Zhuo authored
Virtio PCI supports new parameter sizes of find_vqs(). Signed-off-by:
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Xuan Zhuo authored
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:
Hans de Goede <hdegoede@redhat.com> Reviewed-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Introduce vp_active_vq() to configure vring to backend after vq attach vring. And configure vq vector if necessary. Signed-off-by:
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Xuan Zhuo authored
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/139Signed-off-by:
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Xuan Zhuo authored
Add queue_reset in virtio_pci_modern_common_cfg. https://github.com/oasis-tcs/virtio-spec/issues/124 https://github.com/oasis-tcs/virtio-spec/issues/139Signed-off-by:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Added VIRTIO_F_RING_RESET, it came from here https://github.com/oasis-tcs/virtio-spec/issues/124 https://github.com/oasis-tcs/virtio-spec/issues/139 This feature indicates that the driver can reset a queue individually. Signed-off-by:
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Xuan Zhuo authored
This patch allows the new introduced __virtqueue_break()/__virtqueue_unbreak() to break/unbreak the virtqueue. Signed-off-by:
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Xuan Zhuo authored
Add queue_notify_data in struct virtio_pci_common_cfg, which comes from here https://github.com/oasis-tcs/virtio-spec/issues/89 In order not to affect the API, add a dedicated structure struct virtio_pci_modern_common_cfg to virtio_pci_modern.h. Since I want to add queue_reset after queue_notify_data, I submitted this patch first. Signed-off-by:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Separate the logic of attach vring, the subsequent patch will call it separately. Signed-off-by:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Separate the logic of packed to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by:
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Xuan Zhuo authored
Free the structure struct vring_vritqueue_packed. Subsequent patches require it. Signed-off-by:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Separate the logic of creating desc_state, desc_extra, and subsequent patches will call it independently. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of split to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by:
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Xuan Zhuo authored
Free the structure struct vring_vritqueue_split. Subsequent patches require it. Signed-off-by:
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Xuan Zhuo authored
__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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
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:
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Xuan Zhuo authored
Introduce vring_free() to free the vring of vq. Subsequent patches will use vring_free() alone. Signed-off-by:
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Xuan Zhuo authored
Added documentation for virtqueue_detach_unused_buf, allowing it to be called on queue reset. Signed-off-by:
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Xuan Zhuo authored
reset can be divided into the following four steps (example): 1. transport: notify the device to reset the queue 2. vring: recycle the buffer submitted 3. vring: reset/resize the vring (may re-alloc) 4. transport: mmap vring to device, and enable the queue In order to support queue reset, add two callbacks in struct virtio_config_ops to implement steps 1 and 4. Signed-off-by:
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