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.
Performing reset on a queue is divided into four 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
#2-#8 : virtio ring support re-enable reset queue and release vring
#9-#14 : virtio PCI support reset queue and re-enable
#15 : add queue reset helper
#16-#17: virtio-net support rx, tx reset
#18-#22: virtio-net support set ringparam
Please review. Thanks.
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
Xuan Zhuo (22):
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: reserve vq->priv for re-enable queue
virtio_pci: queue_reset: support VIRTIO_F_RING_RESET
virtio: queue_reset: add helper
virtio_net: split free_unused_bufs()
virtio_net: support rx/tx queue reset
virtio: add helper virtqueue_get_vring_max_size()
virtio: add helper virtio_set_max_ring_num()
virtio_net: set the default max ring num
virtio_net: get max ring size by virtqueue_get_vring_max_size()
virtio_net: support set_ringparam
drivers/net/virtio_net.c | 238 ++++++++++++++++++++++---
drivers/virtio/virtio_mmio.c | 2 +
drivers/virtio/virtio_pci_common.c | 61 +++++--
drivers/virtio/virtio_pci_common.h | 10 +-
drivers/virtio/virtio_pci_legacy.c | 6 +-
drivers/virtio/virtio_pci_modern.c | 82 ++++++++-
drivers/virtio/virtio_pci_modern_dev.c | 36 ++++
drivers/virtio/virtio_ring.c | 193 +++++++++++++++-----
include/linux/virtio.h | 15 ++
include/linux/virtio_config.h | 82 +++++++++
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 ++
14 files changed, 668 insertions(+), 117 deletions(-)
--
2.31.0
