Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/amdgpu: Program IH_VMID_LUT_INDEX register on GFX 12.1
For querying VMID <-> PASID mapping on GFX 12.1, we need to first
program the IH_VMID_LUT_INDEX before fetching the LUT mapping. Without
this TLB flush may not work.
Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Michael Chen <michael.chen@amd.com>
Reviewed-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by
Mukul Joshi
and committed by
Alex Deucher
44fc86f2
d3336c93
+12
-2
+12
-2
drivers/gpu/drm/amd/amdgpu/gmc_v12_1.c
+12
-2
drivers/gpu/drm/amd/amdgpu/gmc_v12_1.c
···
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}
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static bool gmc_v12_1_get_vmid_pasid_mapping_info(struct amdgpu_device *adev,
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uint8_t vmid, uint16_t *p_pasid)
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uint8_t vmid, uint8_t inst,
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uint16_t *p_pasid)
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{
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uint16_t index;
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+
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if (inst/4)
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index = 0xA + inst%4;
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else
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index = 0x2 + inst%4;
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WREG32(SOC15_REG_OFFSET(OSSSYS, 0, regIH_VMID_LUT_INDEX), index);
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*p_pasid = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, regIH_VMID_0_LUT) + vmid) & 0xffff;
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return !!(*p_pasid);
···
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for (vmid = 1; vmid < 16; vmid++) {
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bool valid;
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valid = gmc_v12_1_get_vmid_pasid_mapping_info(adev, vmid,
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valid = gmc_v12_1_get_vmid_pasid_mapping_info(adev, vmid, inst,
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&queried);
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if (!valid || queried != pasid)
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continue;