From a3ac30ffea5de2f511696ae46f5a7f793e6d4bfb Mon Sep 17 00:00:00 2001 From: Srinivasan Shanmugam Date: Wed, 20 Aug 2025 16:39:38 +0530 Subject: [PATCH 5139/5403] drm/amdgpu/ttm: Initialize AMDGPU_PL_MMIO_REMAP Heap MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Suggested-by: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Alex Deucher Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 42f97d568059..1a68ba17a62d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -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"); -- 2.54.0