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Message-Id: <20180709072241.8886-1-tiwei.bie@intel.com>
Date: Mon, 9 Jul 2018 15:22:36 +0800
From: Tiwei Bie <tiwei.bie@...el.com>
To: mst@...hat.com, jasowang@...hat.com,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
virtio-dev@...ts.oasis-open.org
Cc: wexu@...hat.com, jfreimann@...hat.com, tiwei.bie@...el.com
Subject: [PATCH net-next v1 0/5] virtio: support packed ring
Hello everyone,
This patch set implements packed ring support in virtio driver.
Some functional tests have been done with Jason's
packed ring implementation in vhost:
https://lkml.org/lkml/2018/7/3/33
Both of ping and netperf worked as expected.
RFC (v6) -> v1:
- Avoid extra virtio_wmb() in virtqueue_enable_cb_delayed_packed()
when event idx is off (Jason);
- Fix bufs calculation in virtqueue_enable_cb_delayed_packed() (Jason);
- Test the state of the desc at used_idx instead of last_used_idx
in virtqueue_enable_cb_delayed_packed() (Jason);
- Save wrap counter (as part of queue state) in the return value
of virtqueue_enable_cb_prepare_packed();
- Refine the packed ring definitions in uapi;
- Rebase on the net-next tree;
RFC v5 -> RFC v6:
- Avoid tracking addr/len/flags when DMA API isn't used (MST/Jason);
- Define wrap counter as bool (Jason);
- Use ALIGN() in vring_init_packed() (Jason);
- Avoid using pointer to track `next` in detach_buf_packed() (Jason);
- Add comments for barriers (Jason);
- Don't enable RING_PACKED on ccw for now (noticed by Jason);
- Refine the memory barrier in virtqueue_poll();
- Add a missing memory barrier in virtqueue_enable_cb_delayed_packed();
- Remove the hacks in virtqueue_enable_cb_prepare_packed();
RFC v4 -> RFC v5:
- Save DMA addr, etc in desc state (Jason);
- Track used wrap counter;
RFC v3 -> RFC v4:
- Make ID allocation support out-of-order (Jason);
- Various fixes for EVENT_IDX support;
RFC v2 -> RFC v3:
- Split into small patches (Jason);
- Add helper virtqueue_use_indirect() (Jason);
- Just set id for the last descriptor of a list (Jason);
- Calculate the prev in virtqueue_add_packed() (Jason);
- Fix/improve desc suppression code (Jason/MST);
- Refine the code layout for XXX_split/packed and wrappers (MST);
- Fix the comments and API in uapi (MST);
- Remove the BUG_ON() for indirect (Jason);
- Some other refinements and bug fixes;
RFC v1 -> RFC v2:
- Add indirect descriptor support - compile test only;
- Add event suppression supprt - compile test only;
- Move vring_packed_init() out of uapi (Jason, MST);
- Merge two loops into one in virtqueue_add_packed() (Jason);
- Split vring_unmap_one() for packed ring and split ring (Jason);
- Avoid using '%' operator (Jason);
- Rename free_head -> next_avail_idx (Jason);
- Add comments for virtio_wmb() in virtqueue_add_packed() (Jason);
- Some other refinements and bug fixes;
Thanks!
Tiwei Bie (5):
virtio: add packed ring definitions
virtio_ring: support creating packed ring
virtio_ring: add packed ring support
virtio_ring: add event idx support in packed ring
virtio_ring: enable packed ring
drivers/s390/virtio/virtio_ccw.c | 8 +
drivers/virtio/virtio_ring.c | 1365 ++++++++++++++++++++++------
include/linux/virtio_ring.h | 8 +-
include/uapi/linux/virtio_config.h | 3 +
include/uapi/linux/virtio_ring.h | 43 +
5 files changed, 1151 insertions(+), 276 deletions(-)
--
2.18.0
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