mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-02-09 05:02:04 -05:00
Code Issues Packages Projects Releases Wiki Activity

drm/radeon: Assign VMID to PASID for IH in non-HWS mode

Browse Source 
This patch fixes a bug in kgd_set_pasid_vmid_mapping(), where the function
only updated the ATC registers (IOMMU) with the new VMID <--> PASID mapping,
but didn't update the IH (Interrupt) registers.

The bug only occurs when using non-HWS mode. In HWS mode, the CP automatically
does the VMID <--> PASID mapping.

Signed-off-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ben Goz
2014-12-17 14:09:10 +02:00
committed by Oded Gabbay
parent 4c18442e53
commit fec77bb50f
2 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/radeon/cikd.h
View File

@@ -2156,4 +2156,6 @@
#define ATC_VM_APERTURE1_HIGH_ADDR 0x330Cu
#define ATC_VM_APERTURE1_LOW_ADDR 0x3304u
#define IH_VMID_0_LUT 0x3D40u
#endif

4
drivers/gpu/drm/radeon/radeon_kfd.c
View File

@@ -390,6 +390,10 @@ static int kgd_set_pasid_vmid_mapping(struct kgd_dev *kgd, unsigned int pasid,
cpu_relax();
write_register(kgd, ATC_VMID_PASID_MAPPING_UPDATE_STATUS, 1U << vmid);
/* Mapping vmid to pasid also for IH block */
write_register(kgd, IH_VMID_0_LUT + vmid * sizeof(uint32_t),
pasid_mapping);
return 0;
}