Commit Graph

14 Commits

Author SHA1 Message Date
X512
a7ed58868f virtio: add interrupt declarations
Change-Id: Ifd68f69599a8313615c31b85828aa5b96c68c165
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4069
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
2021-06-06 19:03:30 +00:00
X512
44a8696dc5 add VirtIO header
Change-Id: I938e80fe156a0a1d49e0eef330cbfc0cf22f0995
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4002
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
2021-05-27 17:33:00 +00:00
Jérôme Duval
d8e1fd6eda virtio: add clear_feature hook.
Change-Id: I282ffc65a7bd692145626ab4272c5df4a792e9d4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2383
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
2020-03-21 17:16:45 +00:00
Michael Lotz
9a2911ca8c virtio: Rework queue_dequeue to return a boolean.
It previously returned the cookie directly, which made it impossible
to distinguish between a NULL cookie and the function not having
anything to dequeue. This lead to some code setting a cookie that was
not actually used.

Return the dequeue status as a boolean and provide the cookie with an
optionally handed in pointer instead and adjust all users.

Change-Id: Iaac1726ac4bc7ae42bb96b8f0915852b6def5822
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1814
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
2019-09-02 14:30:29 +00:00
Michael Lotz
2f211cce6d virtio: Replace size return with usedLength in queue_dequeue.
The size was in fact the count of physical entries that were used. That
number must necessarily be the same as the number given when adding to
the queue, so that number isn't really interesting. Consequently none
of the users of that API made use of it.

Return the used length instead, which is the way virtio signals how much
valid data resides in the dequeued buffer. This is for example important
to know the frame length of incoming packets in virtio_net.
2018-11-17 00:34:49 +01:00
Jérôme Duval
c02c4653c2 virtio: sync ids with Linux.
Change-Id: I1ca852f16e2b8d5d22ebed25b682e56fd934c46c
Reviewed-on: https://review.haiku-os.org/640
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
2018-10-24 07:36:51 +00:00
Jérôme Duval
61cd7e85d7 virtio: add API to uninit a device.
* free interrupts, free queues, return to init state.
* this will be used by virtio_net on interface uninit.

Change-Id: I7c1e6facc37cf6bfe19628576fdf2c0bac9e5c38
2018-04-26 06:25:41 +00:00
Jérôme Duval
6e82e42859 virtio: refactor to have a handler per queue.
* enable to iterate on available entries in one interrupt call.
* negociate -> negotiate, (void *) -> (void* ), thanks axel and philippe!

Change-Id: Ie2d290797abcbf4c0f3cb5bfff71d091bb800fa6
2018-04-26 06:25:15 +00:00
Jerome Duval
33f263cb01 virtio: add queue_is_full(), queue_is_empty(), queue_size() hooks. 2013-09-18 17:43:39 +02:00
Jérôme Duval
f3b8787e91 virtio.h: remove trailing whitespaces. 2013-07-18 18:27:01 +02:00
Jérôme Duval
ed4a8e4d11 virtio: changed a bit the driver API by adding a driverCookie.
* the processing of requests in drivers is eased a bit with this change, but
this could be improved for instance by enabling a driver to dequeue items
in a service thread instead of the interrupt handler.
* made a few methods const.
2013-07-17 17:30:18 +02:00
Jérôme Duval
8dfd68e0f8 Virtio PCI: added support for MSI-X interrupts
* make use of MSI/MSI-X PCI x86 API
* MSI support untested because QEmu only offers MSI-X
* changed a bit the Virtio bus API by adding a queue count parameter
for the setup_interrupt() hook.
2013-07-11 20:37:37 +02:00
Jérôme Duval
6e6c121b84 virtio: added several devices ids. 2013-06-07 18:00:17 +02:00
Jérôme Duval
6bbf9c9da9 Virtio: added drivers for PCI busses, bus manager and block device.
* the Virtio PCI bus driver exposes a Virtio controller to the Virtio bus manager,
which in turn exposes a Virtio device consumed by Virtio drivers. Drivers follow the
new driver model.
* virtio_block handles Virtio block devices under disk/virtual/virtio_block/x/raw.
* Here is the Qemu command line option for Virtio disk devices:
  -drive file=haiku.image,if=virtio
* the PCI bus driver currently supports only legacy interrupts (no MSI(-X) yet).
* There is room for improvements in the bus manager:
  - it notifies the host for each queued request, which isn't optimal.
  - transfer descriptors should probably be simply preallocated (they are nicely
    leaked at the moment).
  - indirect descriptors are not supported yet.
and in the block driver:
  - get the id of the disk.
  - implements flushing the cache.
  - improves dma restrictions.
  - do_io() should use a page for header descriptors instead of malloc(), which
    could cross boundaries.
* The device manager tries to guess the driver based on the PCI device type, this
implies having to declare the "busses/virtio" path for each possible type
provided by Virtio. Thus future driver additions might require patching the device
manager.
* virtio.h is still private, the API is subject to changes.
* virtio_pci.h, virtio_blk.h, virtio_ring.h are copied unchanged from FreeBSD.
2013-05-26 17:02:50 +02:00