kernel/linux.git/include/linux/virtio_pci_modern.h, branch v6.12.80

virtio-pci: Introduce admin virtqueue

2023-12-19T18:51:31+00:00

Introduce support for the admin virtqueue. By negotiating VIRTIO_F_ADMIN_VQ feature, driver detects capability and creates one administration virtqueue. Administration virtqueue implementation in virtio pci generic layer, enables multiple types of upper layer drivers such as vfio, net, blk to utilize it. Signed-off-by: Feng Liu Reviewed-by: Parav Pandit Reviewed-by: Jiri Pirko Acked-by: Michael S. Tsirkin Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20231219093247.170936-3-yishaih@nvidia.com Signed-off-by: Alex Williamson

virtio_pci: move structure to a header

2023-11-01T13:31:16+00:00

These are guest/host interfaces, so they belong in the header where e.g. qemu will know to find them. Note: we added a new structure as opposed to extending existing one because someone might be relying on the size of the existing structure staying unchanged. Add a warning to avoid using sizeof. Signed-off-by: Michael S. Tsirkin Reviewed-by: Xuan Zhuo

virtio_pci: add check for common cfg size

2023-11-01T13:19:59+00:00

Some buggy devices, the common cfg size may not match the features. This patch checks the common cfg size for the features(VIRTIO_F_NOTIF_CONFIG_DATA, VIRTIO_F_RING_RESET). When the common cfg size does not match the corresponding feature, we fail the probe and print error message. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20231019034902.7346-1-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio: kdoc for struct virtio_pci_modern_device

2023-11-01T13:19:58+00:00

Finally following up to Simon's suggestion for some kdoc attention on struct virtio_pci_modern_device. Link: https://lore.kernel.org/netdev/ZE%2FQS0lnUvxFacjf@corigine.com/ Cc: Simon Horman Signed-off-by: Shannon Nelson Acked-by: Eugenio Pérez Message-Id: <20230911213104.14391-1-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang

virtio: allow caller to override device DMA mask in vp_modern

2023-06-27T14:47:08+00:00

To add a bit of vendor flexibility with various virtio based devices, allow the caller to specify a different DMA mask. This adds a dma_mask field to struct virtio_pci_modern_device. If defined by the driver, this mask will be used in a call to dma_set_mask_and_coherent() instead of the traditional DMA_BIT_MASK(64). This allows limiting the DMA space on vendor devices with address limitations. Signed-off-by: Shannon Nelson Acked-by: Jason Wang Message-Id: <20230519215632.12343-3-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin

virtio: allow caller to override device id in vp_modern

2023-06-27T14:47:08+00:00

To add a bit of vendor flexibility with various virtio based devices, allow the caller to check for a different device id. This adds a function pointer field to struct virtio_pci_modern_device to specify an override device id check. If defined by the driver, this function will be called to check that the PCI device is the vendor's expected device, and will return the found device id to be stored in mdev->id.device. This allows vendors with alternative vendor device ids to use this library on their own device BAR. Note: A lot of the diff in this is simply indenting the existing code into an else block. Signed-off-by: Shannon Nelson Acked-by: Jason Wang Message-Id: <20230519215632.12343-2-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin

virtio_pci: introduce helper to get/set queue reset

2022-08-11T08:06:40+00:00

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 Acked-by: Jason Wang Message-Id: <20220801063902.129329-31-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_pci: struct virtio_pci_common_cfg add queue_reset

2022-08-11T08:06:40+00:00

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/139 Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20220801063902.129329-30-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_pci: struct virtio_pci_common_cfg add queue_notify_data

2022-08-11T08:06:40+00:00

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: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20220801063902.129329-26-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio-pci library: introduce vp_modern_get_driver_features()

2021-07-08T11:49:01+00:00

This patch introduce a helper to get driver/guest features from the device. Signed-off-by: Jason Wang Link: https://lore.kernel.org/r/20210602021536.39525-3-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin Reviewed-by: Eli Cohen