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| author | Alex Deucher <alexander.deucher@amd.com> | 2023-05-17 00:16:30 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-06-09 17:37:52 +0300 |
| commit | 45b3a914d40e63d2c9e3a3e02fb2014be975b9b0 (patch) | |
| tree | 66bdb4126a5d312e3c19bb14d163d90d305114ea /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | 92ecb92ccc839c4c4b51ab1025cde5dd82c2fb4b (diff) | |
| download | linux-45b3a914d40e63d2c9e3a3e02fb2014be975b9b0.tar.xz | |
drm/amdgpu/gmc9: fix 64 bit division in partition code
Rework logic or use do_div() to avoid problems on 32 bit.
v2: add a missing case for XCP macro
v3: fix out of bounds array access
v4: fix xcp handling harder
Acked-by: Guchun Chen <guchun.chen@amd.com> (v1)
Reviewed-by: Mukul Joshi <mukul.joshi@amd.com> (v3)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 23101c82519a..902773ce41b5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -814,11 +814,14 @@ static void amdgpu_ttm_gart_bind_gfx9_mqd(struct amdgpu_device *adev, struct amdgpu_ttm_tt *gtt = (void *)ttm; uint64_t total_pages = ttm->num_pages; int num_xcc = max(1U, adev->gfx.num_xcc_per_xcp); - uint64_t page_idx, pages_per_xcc = total_pages / num_xcc; + uint64_t page_idx, pages_per_xcc; int i; uint64_t ctrl_flags = (flags & ~AMDGPU_PTE_MTYPE_VG10_MASK) | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC); + pages_per_xcc = total_pages; + do_div(pages_per_xcc, num_xcc); + for (i = 0, page_idx = 0; i < num_xcc; i++, page_idx += pages_per_xcc) { /* MQD page: use default flags */ amdgpu_gart_bind(adev, |