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| author | Huang Rui <ray.huang@amd.com> | 2020-08-18 14:54:23 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-26 16:40:17 -0400 |
| commit | 6127896f4a272578a62d1b439e86e64721296d65 (patch) | |
| tree | 784476ea5dfda74a5d9772c0ccb9c6861b10ec6d /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | bfcc0c162a6ad3c8025fea0e966b2a09add80b8e (diff) | |
| download | lwn-6127896f4a272578a62d1b439e86e64721296d65.tar.gz lwn-6127896f4a272578a62d1b439e86e64721296d65.zip | |
drm/amdkfd: implement the dGPU fallback path for apu (v6)
We still have a few iommu issues which need to address, so force raven
as "dgpu" path for the moment.
This is to add the fallback path to bypass IOMMU if IOMMU v2 is disabled
or ACPI CRAT table not correct.
v2: Use ignore_crat parameter to decide whether it will go with IOMMUv2.
v3: Align with existed thunk, don't change the way of raven, only renoir
will use "dgpu" path by default.
v4: don't update global ignore_crat in the driver, and revise fallback
function if CRAT is broken.
v5: refine acpi crat good but no iommu support case, and rename the
title.
v6: fix the issue of dGPU initialized firstly, just modify the report
value in the node_show().
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index ed29f0ce007c..dfc1a9721867 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -680,11 +680,14 @@ MODULE_PARM_DESC(debug_largebar, * Ignore CRAT table during KFD initialization. By default, KFD uses the ACPI CRAT * table to get information about AMD APUs. This option can serve as a workaround on * systems with a broken CRAT table. + * + * Default is auto (according to asic type, iommu_v2, and crat table, to decide + * whehter use CRAT) */ int ignore_crat; module_param(ignore_crat, int, 0444); MODULE_PARM_DESC(ignore_crat, - "Ignore CRAT table during KFD initialization (0 = use CRAT (default), 1 = ignore CRAT)"); + "Ignore CRAT table during KFD initialization (0 = auto (default), 1 = ignore CRAT)"); /** * DOC: halt_if_hws_hang (int) |