Commit Graph

5 Commits

Author SHA1 Message Date
Peter Grehan
310dacd09b Various VirtIO improvements
PCI:
        - Properly handle interrupt fallback from MSIX to MSI to legacy.
          The host may not have sufficient resources to support MSIX,
          so we must be able to fallback to legacy interrupts.
        - Add interface to get the (sub) vendor and device IDs.
        - Rename flags to VTPCI_FLAG_* like other VirtIO drivers.
      Block:
        - No longer allocate vtblk_requests from separate UMA zone.
          malloc(9) from M_DEVBUF is sufficient. Assert segment counts
          at allocation.
        - More verbose error and debug messages.
      Network:
        - Remove stray write once variable.
      Virtqueue:
        - Shuffle code around in preparation of converting the mb()s to
          the appropriate atomic(9) operations.
        - Only walk the descriptor chain when freeing if INVARIANTS is
          defined since the result is only KASSERT()ed.

Submitted by:	Bryan Venteicher (bryanv@daemoninthecloset.org)
2012-07-11 02:57:19 +00:00
Peter Grehan
b8a587074f Catch up with Bryan Venteicher's virtio git repo:
a8af6270bd96be6ccd86f70b60fa6512b710e4f0
      virtio_blk: Include function name in panic string

cbdb03a694b76c5253d7ae3a59b9995b9afbb67a
      virtio_balloon: Do the notify outside of the lock

      By the time we return from virtqueue_notify(), the descriptor
      will be in the used ring so we shouldn't have to sleep.

10ba392e60692529a5cbc1e9987e4064e0128447
      virtio: Use DEVMETHOD_END

80cbcc4d6552cac758be67f0c99c36f23ce62110
      virtqueue: Add support for VIRTIO_F_RING_EVENT_IDX

      This can be used to reduce the number of guest/host and
      host/guest interrupts by delaying the interrupt until a
      certain index value is reached.

      Actual use by the network driver will come along later.

8fc465969acc0c58477153e4c3530390db436c02
      virtqueue: Simplify virtqueue_nused()

      Since the values just wrap naturally at UINT16_MAX, we
      can just subtract the two values directly, rather than
      doing 2's complement math.

a8aa22f25959e2767d006cd621b69050e7ffb0ae
      virtio_blk: Remove debugging crud from 75dd732a

      There seems to be an issue with Qemu (or FreeBSD VirtIO) that sets
      the PCI register space for the device config to bogus values. This
      only seems to happen after unloading and reloading the module.

d404800661cb2a9769c033f8a50b2133934501aa
      virtio_blk: Use better variable name

75dd732a97743d96e7c63f7ced3c2169696dadd3
      virtio_blk: Partially revert 92ba40e65

      Just use the virtqueue to determine if any requests are
      still inflight.

06661ed66b7a9efaea240f99f414c368f1bbcdc7
      virtio_blk: error if allowed too few segments

      Should never happen unless the host provides use with a
      bogus seg_max value.

4b33e5085bc87a818433d7e664a0a2c8f56a1a89
      virtio_blk: Sort function declarations

426b9f5cac892c9c64cc7631966461514f7e08c6
      virtio_blk: Cleanup whitespace

617c23e12c61e3c2233d942db713c6b8ff0bd112
      virtio_blk: Call disk_err() on error'd completed requests

081a5712d4b2e0abf273be4d26affcf3870263a9
      virtio_blk: ASSERT the ready and inflight request queues are empty

a9be2631a4f770a84145c18ee03a3f103bed4ca8
      virtio_blk: Simplify check for too many segments

      At the cost of a small style violation.

e00ec09da014f2e60cc75542d0ab78898672d521
      virtio_blk: Add beginnings of suspend/resume

      Still not sure if we need to virtio_stop()/virtio_reinit()
      the device before/after a suspend.

      Don't start additional IO when marked as suspending.

47c71dc6ce8c238aa59ce8afd4bda5aa294bc884
      virtio_blk: Panic when dealt an unhandled BIO cmd

1055544f90fb8c0cc6a2395f5b6104039606aafe
      virtio_blk: Add VQ enqueue/dequeue wrappers

      Wrapper functions managed the added/removing to the in-flight
      list of requests.

      Normally biodone() any completed IO when draining the virtqueue.

92ba40e65b3bb5e4acb9300ece711f1ea8f3f7f4
      virtio_blk: Add in-flight list of requests

74f6d260e075443544522c0833dc2712dd93f49b
      virtio_blk: Rename VTBLK_FLAG_DETACHING to VTBLK_FLAG_DETACH

7aa549050f6fc6551c09c6362ed6b2a0728956ef
      virtio_blk: Finish all BIOs through vtblk_finish_bio()

      Also properly set bio_resid in the case of errors. Most geom_disk
      providers seem to do the same.

9eef6d0e6f7e5dd362f71ba097f2e2e4c3744882
      Added function to translate VirtIO status to error code

ef06adc337f31e1129d6d5f26de6d8d1be27bcd2
      Reset dumping flag when given unexpected parameters

393b3e390c644193a2e392220dcc6a6c50b212d9
      Added missing VTBLK_LOCK() in dump handler

Obtained from:	Bryan Venteicher  bryanv at daemoninthecloset dot org
2012-04-14 05:48:04 +00:00
John Baldwin
cda6c6abf9 Use pci_find_cap() instead of pci_find_extcap() to locate PCI
find capabilities as the latter API is deprecated for this purpose.

MFC after:	2 weeks
2012-03-03 18:03:50 +00:00
Peter Grehan
336f459c31 Catch up with Bryan Venteicher's virtio Hg repo:
c162516
  Remove vtblk_sector_size

c162515
  Wrap long license lines

c162514
  Remove vtblk_unit

c162513
  Wrap long lines in the license.

c162512
  Remove verbose messages when link goes up/down.

  A similar message is printed elsewhere as a result of
  if_link_state_change().

c162511
  Explicity compare pointer to NULL

c162510
  Allocate the mac filter table at attach time.

c162509
  Add real BSD licenses to the header files copied from Linux.

  The chases upstream changes made in Linux awhile ago.

c162508
  Only notify if we actually dequeued something.

c162507
  Change a couple of if () { KASSERT(...) } to just KASSERTs.

  In non-debug kernels, the if() { } probably get optomized
  away, but I guess this is clearer.

c162506
  Remove VIRTIO_BLK_F_TOPOLOGY fields in the config.

  TOPOLOGY has since been removed from the spec, and the FreeBSD
  didn't really do anything with the fields anyways.

c162505
  Move vtblk_enqueue_request() outside the locks when getting the ident.

c162504
  Remove soon to be uneeded trylock during dump [1].
  http://lists.freebsd.org/pipermail/freebsd-current/2011-November/029226.html

c162503
  Remove emtpy line

c162502
  Drop frame if cannot allocate a vtnet_tx_header.

  If we don't, we set OACTIVE, but if there are no
  other frames in flight, vtnet_txeof() will never
  be called to unset OACTIVE. The interface would
  have to be down/up'ed in order to become usable.

  We could be cuter here and only do this if the
  virtqueue is emtpy, but its probably not worth
  the complication.

c162501
  Start mbuf replacement loop at 1 for clarity

Obtained from:	Bryan Venteicher  bryanv at daemoninthecloset dot org
2011-12-06 06:28:32 +00:00
Peter Grehan
10b59a9b4a Import virtio base, PCI front-end, and net/block/balloon drivers.
Tested on Qemu/KVM, VirtualBox, and BHyVe.

Currently built as modules-only on i386/amd64. Man pages not yet hooked
up, pending review.

Submitted by:	Bryan Venteicher  bryanv at daemoninthecloset dot org
Reviewed by:	bz
MFC after:	4 weeks or so
2011-11-18 05:43:43 +00:00