On Fri, Jun 24, 2022 at 10:55:40AM +0800, Xuan Zhuo wrote: > The virtio spec already supports the virtio queue reset function. This patch set > is to add this function to the kernel. The relevant virtio spec information is > here: > > https://github.com/oasis-tcs/virtio-spec/issues/124 > https://github.com/oasis-tcs/virtio-spec/issues/139 > > Also regarding MMIO support for queue reset, I plan to support it after this > patch is passed. > > This patch set implements the refactoring of vring. Finally, the > virtuque_resize() interface is provided based on the reset function of the > transport layer. > > Test environment: > Host: 4.19.91 > Qemu: QEMU emulator version 6.2.50 (with vq reset support) > Test Cmd: ethtool -G eth1 rx $1 tx $2; ethtool -g eth1 > > The default is split mode, modify Qemu virtio-net to add PACKED feature to test > packed mode. > > Qemu code: > https://github.com/fengidri/qemu/compare/89f3bfa3265554d1d591ee4d7f1197b6e3397e84...master Pls rebase on top of my latest tree, there are some conflicts. > In order to simplify the review of this patch set, the function of reusing > the old buffers after resize will be introduced in subsequent patch sets. > > Please review. Thanks. > > v10: > 1. on top of the harden vring IRQ > 2. factor out split and packed from struct vring_virtqueue > 3. some suggest from @Jason Wang > > v9: > 1. Provide a virtqueue_resize() interface directly > 2. A patch set including vring resize, virtio pci reset, virtio-net resize > 3. No more separate structs > > v8: > 1. Provide a virtqueue_reset() interface directly > 2. Split the two patch sets, this is the first part > 3. Add independent allocation helper for allocating state, extra > > v7: > 1. fix #6 subject typo > 2. fix #6 ring_size_in_bytes is uninitialized > 3. check by: make W=12 > > v6: > 1. virtio_pci: use synchronize_irq(irq) to sync the irq callbacks > 2. Introduce virtqueue_reset_vring() to implement the reset of vring during > the reset process. May use the old vring if num of the vq not change. > 3. find_vqs() support sizes to special the max size of each vq > > v5: > 1. add virtio-net support set_ringparam > > v4: > 1. just the code of virtio, without virtio-net > 2. Performing reset on a queue is divided into these steps: > 1. reset_vq: reset one vq > 2. recycle the buffer from vq by virtqueue_detach_unused_buf() > 3. release the ring of the vq by vring_release_virtqueue() > 4. enable_reset_vq: re-enable the reset queue > 3. Simplify the parameters of enable_reset_vq() > 4. add container structures for virtio_pci_common_cfg > > v3: > 1. keep vq, irq unreleased > > *** BLURB HERE *** > > Xuan Zhuo (41): > remoteproc: rename len of rpoc_vring to num > virtio: add helper virtqueue_get_vring_max_size() > virtio: struct virtio_config_ops add callbacks for queue_reset > virtio_ring: update the document of the virtqueue_detach_unused_buf > for queue reset > virtio_ring: remove the arg vq of vring_alloc_desc_extra() > virtio_ring: extract the logic of freeing vring > virtio_ring: split vring_virtqueue > virtio_ring: introduce virtqueue_init() > virtio_ring: split: introduce vring_free_split() > virtio_ring: split: extract the logic of alloc queue > virtio_ring: split: extract the logic of alloc state and extra > virtio_ring: split: extract the logic of attach vring > virtio_ring: split: extract the logic of vring init > virtio_ring: split: introduce virtqueue_reinit_split() > virtio_ring: split: reserve vring_align, may_reduce_num > virtio_ring: split: introduce virtqueue_resize_split() > virtio_ring: packed: introduce vring_free_packed > virtio_ring: packed: extract the logic of alloc queue > virtio_ring: packed: extract the logic of alloc state and extra > virtio_ring: packed: extract the logic of attach vring > virtio_ring: packed: extract the logic of vring init > virtio_ring: packed: introduce virtqueue_reinit_packed() > virtio_ring: packed: introduce virtqueue_resize_packed() > virtio_ring: introduce virtqueue_resize() > virtio_pci: struct virtio_pci_common_cfg add queue_notify_data > virtio: queue_reset: add VIRTIO_F_RING_RESET > virtio: allow to unbreak/break virtqueue individually > virtio_pci: update struct virtio_pci_common_cfg > virtio_pci: introduce helper to get/set queue reset > virtio_pci: extract the logic of active vq for modern pci > virtio_pci: support VIRTIO_F_RING_RESET > virtio: find_vqs() add arg sizes > virtio_pci: support the arg sizes of find_vqs() > virtio_mmio: support the arg sizes of find_vqs() > virtio: add helper virtio_find_vqs_ctx_size() > virtio_net: set the default max ring size by find_vqs() > virtio_net: get ringparam by virtqueue_get_vring_max_size() > virtio_net: split free_unused_bufs() > virtio_net: support rx queue resize > virtio_net: support tx queue resize > virtio_net: support set_ringparam > > arch/um/drivers/virtio_uml.c | 3 +- > drivers/net/virtio_net.c | 209 +++++- > drivers/platform/mellanox/mlxbf-tmfifo.c | 3 + > drivers/remoteproc/remoteproc_core.c | 4 +- > drivers/remoteproc/remoteproc_virtio.c | 13 +- > drivers/s390/virtio/virtio_ccw.c | 4 + > drivers/virtio/virtio_mmio.c | 11 +- > drivers/virtio/virtio_pci_common.c | 32 +- > drivers/virtio/virtio_pci_common.h | 3 +- > drivers/virtio/virtio_pci_legacy.c | 8 +- > drivers/virtio/virtio_pci_modern.c | 157 ++++- > drivers/virtio/virtio_pci_modern_dev.c | 39 ++ > drivers/virtio/virtio_ring.c | 794 +++++++++++++++++------ > drivers/virtio/virtio_vdpa.c | 3 + > include/linux/remoteproc.h | 4 +- > include/linux/virtio.h | 9 + > include/linux/virtio_config.h | 38 +- > include/linux/virtio_pci_modern.h | 2 + > include/uapi/linux/virtio_config.h | 7 +- > include/uapi/linux/virtio_pci.h | 14 + > 20 files changed, 1063 insertions(+), 294 deletions(-) > > -- > 2.31.0
