diff options
Diffstat (limited to 'OvmfPkg/Include/Library/VirtioLib.h')
| -rw-r--r-- | OvmfPkg/Include/Library/VirtioLib.h | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/OvmfPkg/Include/Library/VirtioLib.h b/OvmfPkg/Include/Library/VirtioLib.h index 448dd2b578..3bebd9f2f4 100644 --- a/OvmfPkg/Include/Library/VirtioLib.h +++ b/OvmfPkg/Include/Library/VirtioLib.h @@ -140,8 +140,8 @@ VirtioRingUninit ( // request.
//
typedef struct {
- UINT16 HeadIdx;
- UINT16 NextAvailIdx;
+ UINT16 HeadDescIdx;
+ UINT16 NextDescIdx;
} DESC_INDICES;
@@ -169,9 +169,8 @@ VirtioPrepare ( Append a contiguous buffer for transmission / reception via the virtio ring.
- This function implements the following sections from virtio-0.9.5:
+ This function implements the following section from virtio-0.9.5:
- 2.4.1.1 Placing Buffers into the Descriptor Table
- - 2.4.1.2 Updating the Available Ring
Free space is taken as granted, since the individual drivers support only
synchronous requests and host side status is processed in lock-step with
@@ -199,13 +198,9 @@ VirtioPrepare ( In *Indices:
- @param [in] HeadIdx The index identifying the head buffer (first
- buffer appended) belonging to this same
- request.
-
- @param [in out] NextAvailIdx On input, the index identifying the next
- descriptor available to carry the buffer. On
- output, incremented by one, modulo 2^16.
+ @param [in out] NextDescIdx On input, the index identifying the next
+ descriptor to carry the buffer. On output,
+ incremented by one, modulo 2^16.
**/
VOID
@@ -221,8 +216,8 @@ VirtioAppendDesc ( /**
- Notify the host about appended descriptors and wait until it processes the
- last one (ie. all of them).
+ Notify the host about the descriptor chain just built, and wait until the
+ host processes it.
@param[in] PciIo The target virtio PCI device to notify.
@@ -230,8 +225,10 @@ VirtioAppendDesc ( @param[in out] Ring The virtio ring with descriptors to submit.
- @param[in] Indices The function waits until the host processes
- descriptors up to Indices->NextAvailIdx.
+ In *Indices:
+
+ @param[in] HeadDescIdx Identifies the head descriptor of the descriptor
+ chain.
@return Error code from VirtioWrite() if it fails.
|