[PATCH 03/11] drm/amdgpu: use the GTT windows for BO moves v2
Christian König
deathsimple at vodafone.de
Mon Jul 3 09:44:28 UTC 2017
From: Christian König <christian.koenig at amd.com>
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 <christian.koenig at amd.com>
---
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 15148f1..1fc9866 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 c8059f0..4f5c1da 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;
};
--
2.7.4
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