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OvmfPkg/VirtioNetDxe: document Rx/Tx allocs and mappings on Init/Shutdown 

Document the following actions on the

  EfiSimpleNetworkStarted <-> EfiSimpleNetworkInitialized

state transitions:

* from commit 46b11f00ac ("OvmfPkg/VirtioNetDxe: alloc RxBuf using
  AllocateSharedPages()", 2017-09-14):

  VirtioNetInitRx ->
  { VirtIo->AllocateSharedPages, VirtioMapAllBytesInSharedBuffer }

  VirtioNetShutdownRx ->
  { VirtIo->UnmapSharedBuffer, VirtIo->FreeSharedPages }

* from commit 891f016c1b ("OvmfPkg/VirtioNetDxe: dynamically alloc
  transmit header", 2017-09-14):

  VirtioNetInitTx ->
  { VirtIo->AllocateSharedPages, VirtioMapAllBytesInSharedBuffer }

  VirtioNetShutdownTx ->
  { VirtIo->UnmapSharedBuffer, VirtIo->FreeSharedPages }

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
This commit is contained in:
Laszlo Ersek 2017-09-15 10:14:53 +02:00
parent f9c59fa44a
commit 53b55831e0
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
OvmfPkg/VirtioNetDxe/TechNotes.txt
View File

@ -69,10 +69,14 @@ faithfully indented) that implement the transition.
[SnpInitialize.c] | | [SnpShutdown.c]
VirtioNetInitialize | | VirtioNetShutdown
VirtioNetInitRing {Rx, Tx} | | VirtioNetShutdownRx [SnpSharedHelpers.c]
VirtioRingInit | | VirtioNetShutdownTx [SnpSharedHelpers.c]
VirtioRingMap | | VirtioNetUninitRing [SnpSharedHelpers.c]
VirtioNetInitTx | | {Tx, Rx}
VirtioNetInitRx | | VirtIo->UnmapSharedBuffer
VirtioRingInit | | VirtIo->UnmapSharedBuffer
VirtioRingMap | | VirtIo->FreeSharedPages
VirtioNetInitTx | | VirtioNetShutdownTx [SnpSharedHelpers.c]
VirtIo->AllocateShare... | | VirtIo->UnmapSharedBuffer
VirtioMapAllBytesInSh... | | VirtIo->FreeSharedPages
VirtioNetInitRx | | VirtioNetUninitRing [SnpSharedHelpers.c]
VirtIo->AllocateShare... | | {Tx, Rx}
VirtioMapAllBytesInSh... | | VirtIo->UnmapSharedBuffer
| | VirtioRingUninit
v |
+-----------------------------+