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drm/amdgpu/ttm: Initialize AMDGPU_PL_MMIO_REMAP Heap

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Add a one-page TTM range manager for AMDGPU_PL_MMIO_REMAP via
amdgpu_ttm_init_on_chip(). This only registers the placement with TTM;
no BO is allocated in this patch.

The singleton 4K remap BO is created and freed in the following patch.

This split follows to separate heap bring-up from BO allocation.

Cc: Christian König <christian.koenig@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Srinivasan Shanmugam
2025-08-20 16:39:38 +05:30
committed by Alex Deucher
parent fb5a52dbe9
commit a3ac30ffea
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@@ -2021,6 +2021,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
return r;
}
/* Initialize MMIO-remap pool (single page 4K) */
r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_MMIO_REMAP, 1);
if (r) {
dev_err(adev->dev, "Failed initializing MMIO-remap heap.\n");
return r;
}
/* Initialize preemptible memory pool */
r = amdgpu_preempt_mgr_init(adev);
if (r) {
@@ -2083,6 +2090,7 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
}
amdgpu_bo_free_kernel(&adev->mman.sdma_access_bo, NULL,
&adev->mman.sdma_access_ptr);
amdgpu_ttm_fw_reserve_vram_fini(adev);
amdgpu_ttm_drv_reserve_vram_fini(adev);
@@ -2104,6 +2112,7 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_DOORBELL);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_MMIO_REMAP);
ttm_device_fini(&adev->mman.bdev);
adev->mman.initialized = false;
dev_info(adev->dev, "amdgpu: ttm finalized\n");