[Mesa-dev] [PATCH 2/2] winsys/amdgpu: set AMDGPU_GEM_CREATE_LOCAL if possible

[Christian König]

From: Christian König <christian.koenig at amd.com>

When the kernel supports it set the local flag and
stop adding those BOs to the BO list.

Can probably be optimized much more.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 src/gallium/winsys/amdgpu/drm/amdgpu_bo.c |  8 ++++++++
 src/gallium/winsys/amdgpu/drm/amdgpu_bo.h |  2 ++
 src/gallium/winsys/amdgpu/drm/amdgpu_cs.c | 22 +++++++++++++++++-----
 3 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
index 08348ed..1238d58 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
@@ -38,6 +38,10 @@
 #include <stdio.h>
 #include <inttypes.h>
 
+#ifndef AMDGPU_GEM_CREATE_LOCAL
+#define AMDGPU_GEM_CREATE_LOCAL (1 << 6)
+#endif
+
 /* Set to 1 for verbose output showing committed sparse buffer ranges. */
 #define DEBUG_SPARSE_COMMITS 0
 
@@ -402,6 +406,9 @@ static struct amdgpu_winsys_bo *amdgpu_create_bo(struct amdgpu_winsys *ws,
       request.flags |= AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
    if (flags & RADEON_FLAG_GTT_WC)
       request.flags |= AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+   if (flags & RADEON_FLAG_NO_INTERPROCESS_SHARING &&
+       ws->info.drm_minor >= 20)
+      request.flags |= AMDGPU_GEM_CREATE_LOCAL;
 
    r = amdgpu_bo_alloc(ws->dev, &request, &buf_handle);
    if (r) {
@@ -435,6 +442,7 @@ static struct amdgpu_winsys_bo *amdgpu_create_bo(struct amdgpu_winsys *ws,
    bo->u.real.va_handle = va_handle;
    bo->initial_domain = initial_domain;
    bo->unique_id = __sync_fetch_and_add(&ws->next_bo_unique_id, 1);
+   bo->is_local = !!(request.flags & AMDGPU_GEM_CREATE_LOCAL);
 
    if (initial_domain & RADEON_DOMAIN_VRAM)
       ws->allocated_vram += align64(size, ws->info.gart_page_size);
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h
index 1311344..10b095d 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h
@@ -115,6 +115,8 @@ struct amdgpu_winsys_bo {
    unsigned num_fences;
    unsigned max_fences;
    struct pipe_fence_handle **fences;
+
+   bool is_local;
 };
 
 struct amdgpu_slab {
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
index 9cadfc4..0b76fba 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
@@ -1123,6 +1123,8 @@ void amdgpu_cs_submit_ib(void *job, int thread_index)
       free(handles);
       mtx_unlock(&ws->global_bo_list_lock);
    } else {
+      unsigned num_handles;
+
       if (!amdgpu_add_sparse_backing_buffers(cs)) {
          r = -ENOMEM;
          goto bo_list_error;
@@ -1142,21 +1144,31 @@ void amdgpu_cs_submit_ib(void *job, int thread_index)
          }
       }
 
+      num_handles = 0;
       for (i = 0; i < cs->num_real_buffers; ++i) {
          struct amdgpu_cs_buffer *buffer = &cs->real_buffers[i];
 
+	 if (buffer->bo->is_local)
+            continue;
+
          assert(buffer->u.real.priority_usage != 0);
 
-         cs->handles[i] = buffer->bo->bo;
-         cs->flags[i] = (util_last_bit64(buffer->u.real.priority_usage) - 1) / 4;
+         cs->handles[num_handles] = buffer->bo->bo;
+         cs->flags[num_handles] = (util_last_bit64(buffer->u.real.priority_usage) - 1) / 4;
+	 ++num_handles;
       }
 
       if (acs->ring_type == RING_GFX)
          ws->gfx_bo_list_counter += cs->num_real_buffers;
 
-      r = amdgpu_bo_list_create(ws->dev, cs->num_real_buffers,
-                                cs->handles, cs->flags,
-                                &cs->request.resources);
+      if (num_handles) {
+         r = amdgpu_bo_list_create(ws->dev, num_handles,
+                                   cs->handles, cs->flags,
+                                   &cs->request.resources);
+      } else {
+         r = 0;
+	 cs->request.resources = 0;
+      }
    }
 bo_list_error:
 
-- 
2.7.4