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
Also regarding MMIO support for queue reset, I plan to support it after this
patch is passed.
Please review. Thanks.
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
Xuan Zhuo (14):
virtio_pci: struct virtio_pci_common_cfg add queue_notify_data
virtio: queue_reset: add VIRTIO_F_RING_RESET
virtio_ring: queue_reset: add function vring_setup_virtqueue()
virtio_ring: queue_reset: split: add __vring_init_virtqueue()
virtio_ring: queue_reset: split: support enable reset queue
virtio_ring: queue_reset: packed: support enable reset queue
virtio_ring: queue_reset: extract the release function of the vq ring
virtio_ring: queue_reset: add vring_release_virtqueue()
virtio: queue_reset: struct virtio_config_ops add callbacks for
queue_reset
virtio_pci: queue_reset: update struct virtio_pci_common_cfg and
option functions
virtio_pci: queue_reset: release vq by vp_dev->vqs
virtio_pci: queue_reset: setup_vq() support vring_setup_virtqueue()
virtio_pci: queue_reset: vp_setup_vq() support ring_num
virtio_pci: queue_reset: support VIRTIO_F_RING_RESET
drivers/virtio/virtio_pci_common.c | 65 +++++++---
drivers/virtio/virtio_pci_common.h | 11 +-
drivers/virtio/virtio_pci_legacy.c | 5 +-
drivers/virtio/virtio_pci_modern.c | 99 ++++++++++++--
drivers/virtio/virtio_pci_modern_dev.c | 36 +++++
drivers/virtio/virtio_ring.c | 173 ++++++++++++++++++-------
include/linux/virtio.h | 6 +
include/linux/virtio_config.h | 13 ++
include/linux/virtio_pci_modern.h | 2 +
include/linux/virtio_ring.h | 37 ++++--
include/uapi/linux/virtio_config.h | 7 +-
include/uapi/linux/virtio_pci.h | 14 ++
12 files changed, 375 insertions(+), 93 deletions(-)
--
2.31.0
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