From abca90f1c8103528ca4b194fdc69e933bd23db4c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Fri, 30 Jun 2017 11:05:54 +0200 Subject: [PATCH] drm/amdgpu: use the GTT windows for BO moves v2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This way we don't need to map the full BO at a time any more. v2: use fixed windows for src/dst Signed-off-by: Christian König Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 125 ++++++++++++++++++++---- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 2 + 2 files changed, 108 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index ace178b393dd..4a34b61d44ef 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -47,10 +47,15 @@ #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT) +static int amdgpu_map_buffer(struct ttm_buffer_object *bo, + struct ttm_mem_reg *mem, unsigned num_pages, + uint64_t offset, unsigned window, + struct amdgpu_ring *ring, + uint64_t *addr); + static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev); static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev); - /* * Global memory. */ @@ -97,6 +102,8 @@ static int amdgpu_ttm_global_init(struct amdgpu_device *adev) goto error_bo; } + mutex_init(&adev->mman.gtt_window_lock); + ring = adev->mman.buffer_funcs_ring; rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_KERNEL]; r = amd_sched_entity_init(&ring->sched, &adev->mman.entity, @@ -123,6 +130,7 @@ static void amdgpu_ttm_global_fini(struct amdgpu_device *adev) if (adev->mman.mem_global_referenced) { amd_sched_entity_fini(adev->mman.entity.sched, &adev->mman.entity); + mutex_destroy(&adev->mman.gtt_window_lock); drm_global_item_unref(&adev->mman.bo_global_ref.ref); drm_global_item_unref(&adev->mman.mem_global_ref); adev->mman.mem_global_referenced = false; @@ -256,10 +264,13 @@ static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo, struct drm_mm_node *mm_node, struct ttm_mem_reg *mem) { - uint64_t addr; + uint64_t addr = 0; - addr = mm_node->start << PAGE_SHIFT; - addr += bo->bdev->man[mem->mem_type].gpu_offset; + if (mem->mem_type != TTM_PL_TT || + amdgpu_gtt_mgr_is_allocated(mem)) { + addr = mm_node->start << PAGE_SHIFT; + addr += bo->bdev->man[mem->mem_type].gpu_offset; + } return addr; } @@ -284,34 +295,41 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo, return -EINVAL; } - if (old_mem->mem_type == TTM_PL_TT) { - r = amdgpu_ttm_bind(bo, old_mem); - if (r) - return r; - } - old_mm = old_mem->mm_node; old_size = old_mm->size; old_start = amdgpu_mm_node_addr(bo, old_mm, old_mem); - if (new_mem->mem_type == TTM_PL_TT) { - r = amdgpu_ttm_bind(bo, new_mem); - if (r) - return r; - } - new_mm = new_mem->mm_node; new_size = new_mm->size; new_start = amdgpu_mm_node_addr(bo, new_mm, new_mem); num_pages = new_mem->num_pages; + mutex_lock(&adev->mman.gtt_window_lock); while (num_pages) { - unsigned long cur_pages = min(old_size, new_size); + unsigned long cur_pages = min(min(old_size, new_size), + (u64)AMDGPU_GTT_MAX_TRANSFER_SIZE); + uint64_t from = old_start, to = new_start; struct dma_fence *next; - r = amdgpu_copy_buffer(ring, old_start, new_start, + if (old_mem->mem_type == TTM_PL_TT && + !amdgpu_gtt_mgr_is_allocated(old_mem)) { + r = amdgpu_map_buffer(bo, old_mem, cur_pages, + old_start, 0, ring, &from); + if (r) + goto error; + } + + if (new_mem->mem_type == TTM_PL_TT && + !amdgpu_gtt_mgr_is_allocated(new_mem)) { + r = amdgpu_map_buffer(bo, new_mem, cur_pages, + new_start, 1, ring, &to); + if (r) + goto error; + } + + r = amdgpu_copy_buffer(ring, from, to, cur_pages * PAGE_SIZE, - bo->resv, &next, false, false); + bo->resv, &next, false, true); if (r) goto error; @@ -338,12 +356,15 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo, new_start += cur_pages * PAGE_SIZE; } } + mutex_unlock(&adev->mman.gtt_window_lock); r = ttm_bo_pipeline_move(bo, fence, evict, new_mem); dma_fence_put(fence); return r; error: + mutex_unlock(&adev->mman.gtt_window_lock); + if (fence) dma_fence_wait(fence, false); dma_fence_put(fence); @@ -1253,6 +1274,72 @@ int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma) return ttm_bo_mmap(filp, vma, &adev->mman.bdev); } +static int amdgpu_map_buffer(struct ttm_buffer_object *bo, + struct ttm_mem_reg *mem, unsigned num_pages, + uint64_t offset, unsigned window, + struct amdgpu_ring *ring, + uint64_t *addr) +{ + struct amdgpu_ttm_tt *gtt = (void *)bo->ttm; + struct amdgpu_device *adev = ring->adev; + struct ttm_tt *ttm = bo->ttm; + struct amdgpu_job *job; + unsigned num_dw, num_bytes; + dma_addr_t *dma_address; + struct dma_fence *fence; + uint64_t src_addr, dst_addr; + uint64_t flags; + int r; + + BUG_ON(adev->mman.buffer_funcs->copy_max_bytes < + AMDGPU_GTT_MAX_TRANSFER_SIZE * 8); + + *addr = adev->mc.gtt_start; + *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE * + AMDGPU_GPU_PAGE_SIZE; + + num_dw = adev->mman.buffer_funcs->copy_num_dw; + while (num_dw & 0x7) + num_dw++; + + num_bytes = num_pages * 8; + + r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job); + if (r) + return r; + + src_addr = num_dw * 4; + src_addr += job->ibs[0].gpu_addr; + + dst_addr = adev->gart.table_addr; + dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8; + amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, + dst_addr, num_bytes); + + amdgpu_ring_pad_ib(ring, &job->ibs[0]); + WARN_ON(job->ibs[0].length_dw > num_dw); + + dma_address = >t->ttm.dma_address[offset >> PAGE_SHIFT]; + flags = amdgpu_ttm_tt_pte_flags(adev, ttm, mem); + r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags, + &job->ibs[0].ptr[num_dw]); + if (r) + goto error_free; + + r = amdgpu_job_submit(job, ring, &adev->mman.entity, + AMDGPU_FENCE_OWNER_UNDEFINED, &fence); + if (r) + goto error_free; + + dma_fence_put(fence); + + return r; + +error_free: + amdgpu_job_free(job); + return r; +} + int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset, uint64_t dst_offset, uint32_t byte_count, struct reservation_object *resv, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h index c8059f067185..4f5c1da5922e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h @@ -52,6 +52,8 @@ struct amdgpu_mman { /* buffer handling */ const struct amdgpu_buffer_funcs *buffer_funcs; struct amdgpu_ring *buffer_funcs_ring; + + struct mutex gtt_window_lock; /* Scheduler entity for buffer moves */ struct amd_sched_entity entity; }; -- 2.20.1