* [PATCH] IntelSiliconPkg IntelVTdPmrPei: Install IoMmu PPI before enabling PMR
@ 2018-01-22 11:17 Star Zeng
0 siblings, 0 replies; only message in thread
From: Star Zeng @ 2018-01-22 11:17 UTC (permalink / raw)
To: edk2-devel; +Cc: Star Zeng, Jiewen Yao
Then the consumer of IoMmu PPI has opportunity to get granted DMA
buffer (by callback) to replace old buffer before it is forbidden
by enabling PMR.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
.../Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c | 63 ++++++++++------------
1 file changed, 29 insertions(+), 34 deletions(-)
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c b/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c
index 63ba94d62b7e..87708cfcddda 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c
@@ -381,17 +381,13 @@ CONST EFI_PEI_PPI_DESCRIPTOR mIoMmuPpiList = {
Initialize DMA protection.
@param VTdInfo The VTd engine context information.
- @param DmaBufferSize the DMA buffer size
- @param DmaBufferBase the DMA buffer base
@retval EFI_SUCCESS the DMA protection is initialized.
@retval EFI_OUT_OF_RESOURCES no enough resource to initialize DMA protection.
**/
EFI_STATUS
InitDmaProtection (
- IN VTD_INFO *VTdInfo,
- IN UINTN DmaBufferSize,
- OUT UINTN *DmaBufferBase
+ IN VTD_INFO *VTdInfo
)
{
EFI_STATUS Status;
@@ -402,6 +398,13 @@ InitDmaProtection (
UINTN LowTop;
UINTN HighBottom;
UINT64 HighTop;
+ DMA_BUFFER_INFO *DmaBufferInfo;
+ VOID *Hob;
+
+ Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);
+ DmaBufferInfo = GET_GUID_HOB_DATA(Hob);
+
+ DEBUG ((DEBUG_INFO, " DmaBufferSize : 0x%x\n", DmaBufferInfo->DmaBufferSize));
LowMemoryAlignment = GetLowMemoryAlignment (VTdInfo, VTdInfo->EngineMask);
HighMemoryAlignment = GetHighMemoryAlignment (VTdInfo, VTdInfo->EngineMask);
@@ -410,17 +413,28 @@ InitDmaProtection (
} else {
MemoryAlignment = LowMemoryAlignment;
}
- ASSERT (DmaBufferSize == ALIGN_VALUE(DmaBufferSize, MemoryAlignment));
- *DmaBufferBase = (UINTN)AllocateAlignedPages (EFI_SIZE_TO_PAGES(DmaBufferSize), MemoryAlignment);
- ASSERT (*DmaBufferBase != 0);
- if (*DmaBufferBase == 0) {
+ ASSERT (DmaBufferInfo->DmaBufferSize == ALIGN_VALUE(DmaBufferInfo->DmaBufferSize, MemoryAlignment));
+ DmaBufferInfo->DmaBufferBase = (UINTN)AllocateAlignedPages (EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize), MemoryAlignment);
+ ASSERT (DmaBufferInfo->DmaBufferBase != 0);
+ if (DmaBufferInfo->DmaBufferBase == 0) {
DEBUG ((DEBUG_INFO, " InitDmaProtection : OutOfResource\n"));
return EFI_OUT_OF_RESOURCES;
}
+ DEBUG ((DEBUG_INFO, " DmaBufferBase : 0x%x\n", DmaBufferInfo->DmaBufferBase));
+
+ DmaBufferInfo->DmaBufferCurrentTop = DmaBufferInfo->DmaBufferBase + DmaBufferInfo->DmaBufferSize;
+ DmaBufferInfo->DmaBufferCurrentBottom = DmaBufferInfo->DmaBufferBase;
+
+ //
+ // Install PPI.
+ //
+ Status = PeiServicesInstallPpi (&mIoMmuPpiList);
+ ASSERT_EFI_ERROR(Status);
+
LowBottom = 0;
- LowTop = *DmaBufferBase;
- HighBottom = *DmaBufferBase + DmaBufferSize;
+ LowTop = DmaBufferInfo->DmaBufferBase;
+ HighBottom = DmaBufferInfo->DmaBufferBase + DmaBufferInfo->DmaBufferSize;
HighTop = LShiftU64 (1, VTdInfo->HostAddressWidth + 1);
Status = SetDmaProtectedRange (
@@ -433,7 +447,7 @@ InitDmaProtection (
);
if (EFI_ERROR(Status)) {
- FreePages ((VOID *)*DmaBufferBase, EFI_SIZE_TO_PAGES(DmaBufferSize));
+ FreePages ((VOID *)DmaBufferInfo->DmaBufferBase, EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize));
}
return Status;
@@ -543,7 +557,6 @@ InitVTdPmrForDma (
EFI_STATUS Status;
VOID *Hob;
VTD_INFO *VTdInfo;
- DMA_BUFFER_INFO *DmaBufferInfo;
Hob = GetFirstGuidHob (&mVTdInfoGuid);
VTdInfo = GET_GUID_HOB_DATA(Hob);
@@ -553,29 +566,11 @@ InitVTdPmrForDma (
//
ParseDmarAcpiTableRmrr (VTdInfo);
- Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);
- DmaBufferInfo = GET_GUID_HOB_DATA(Hob);
-
- DEBUG ((DEBUG_INFO, " DmaBufferSize : 0x%x\n", DmaBufferInfo->DmaBufferSize));
- //
- // Find a pre-memory in resource hob as DMA buffer
- // Mark PEI memory to be DMA protected.
- //
- Status = InitDmaProtection (VTdInfo, DmaBufferInfo->DmaBufferSize, &DmaBufferInfo->DmaBufferBase);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- DEBUG ((DEBUG_INFO, " DmaBufferBase : 0x%x\n", DmaBufferInfo->DmaBufferBase));
-
- DmaBufferInfo->DmaBufferCurrentTop = DmaBufferInfo->DmaBufferBase + DmaBufferInfo->DmaBufferSize;
- DmaBufferInfo->DmaBufferCurrentBottom = DmaBufferInfo->DmaBufferBase;
-
//
- // Install PPI.
+ // Allocate a range in PEI memory as DMA buffer
+ // Mark others to be DMA protected.
//
- Status = PeiServicesInstallPpi (&mIoMmuPpiList);
- ASSERT_EFI_ERROR(Status);
+ Status = InitDmaProtection (VTdInfo);
return Status;
}
--
2.7.0.windows.1
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2018-01-22 11:17 [PATCH] IntelSiliconPkg IntelVTdPmrPei: Install IoMmu PPI before enabling PMR Star Zeng
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