NotificationsYou must be signed in to change notification settings
Fork113
Star397

Commitc191515

committed

drm/amdgpu: Query P2PDMA distance only if CONFIG_HSA_AMD_P2P is defined

CONFIG_HSA_AMD_P2P indicates the requirements that are needed for P2P DMAMappings. It is important to note that enabling CONFIG_HSA_AMD_P2P is anecessary but insufficient condition. It is possible to encounter runtimeerrors - e.g. CPU's do not support Inter-CPU transport of PCIe transactionpackets i.e. P2PDMA distance API may return errorSigned-off-by: Ramesh Errabolu <Ramesh.Errabolu@amd.com>Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>

1 parent437f02c commitc191515Copy full SHA for c191515

File tree

1 file changed

-1

lines changed

drivers/gpu/drm/amd/amdgpu
- amdgpu_device.c

1 file changed

-1

lines changed

`‎drivers/gpu/drm/amd/amdgpu/amdgpu_device.c‎`

Lines changed: 7 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -5577,6 +5577,12 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)`
`5577`	`5577`	`* Return true if @peer_adev can access (DMA) @adev through the PCIe`
`5578`	`5578`	`* BAR, i.e. @adev is "large BAR" and the BAR matches the DMA mask of`
`5579`	`5579`	`* @peer_adev.`
	`5580`	`+ *`
	`5581`	`+ * @note: CONFIG_HSA_AMD_P2P indicates support for P2P DMA mappings. Query`
	`5582`	`+ * P2PDMA distance only if the kernel has all the prerequisites for P2P DMA`
	`5583`	`+ * support. Otherwise fall back to the less reliable legacy P2P support to`
	`5584`	`+ * avoid regressions.`
	`5585`	`+ *`
`5580`	`5586`	`*/`
`5581`	`5587`	`boolamdgpu_device_is_peer_accessible(structamdgpu_device*adev,`
`5582`	`5588`	`structamdgpu_device*peer_adev)`
`@@ -5587,7 +5593,7 @@ bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev,`
`5587`	`5593`	`resource_size_taper_limit=`
`5588`	`5594`	`adev->gmc.aper_base+adev->gmc.aper_size-1;`
`5589`	`5595`
`5590`		`-#ifdefCONFIG_PCI_P2PDMA`
	`5596`	`+#ifdefCONFIG_HSA_AMD_P2P`
`5591`	`5597`	`p2p_access= !adev->gmc.xgmi.connected_to_cpu&&`
`5592`	`5598`	`!(pci_p2pdma_distance_many(adev->pdev,`
`5593`	`5599`	`&peer_adev->dev,1, true)<0);`

0 commit comments

Comments

(0)

Movatterモバイル変換

Navigation Menu

Search code, repositories, users, issues, pull requests...

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Commitc191515

File tree

1 file changed

1 file changed

`‎drivers/gpu/drm/amd/amdgpu/amdgpu_device.c‎`

0 commit comments