From ae4f442304aee57e23dde7a2f3b70b54c1565966 Mon Sep 17 00:00:00 2001
From: Nicolai Hähnle <nicolai.haehnle@amd.com>
Date: Tue, 7 Feb 2017 17:35:02 +0100
Subject: winsys/amdgpu: build handles and flags list late on submit thread
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This probably has only minor performance effects, but it simplifies some
subsequent code slightly.

Ideally, it could also be used to simplify the handling of slab buffers
in the same way, but unfortunately that's not possible as long as we need
indices for relocations.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---
 src/gallium/winsys/amdgpu/drm/amdgpu_cs.c | 41 +++++++++++++++++++------------
 src/gallium/winsys/amdgpu/drm/amdgpu_cs.h |  4 ++-
 2 files changed, 28 insertions(+), 17 deletions(-)

(limited to 'src/gallium/winsys/amdgpu')

diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
index 2520affc1e4..e2d3a45e6e6 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
@@ -325,33 +325,21 @@ amdgpu_do_add_real_buffer(struct amdgpu_cs_context *cs, struct amdgpu_winsys_bo
       unsigned new_max =
          MAX2(cs->max_real_buffers + 16, (unsigned)(cs->max_real_buffers * 1.3));
       struct amdgpu_cs_buffer *new_buffers;
-      amdgpu_bo_handle *new_handles;
-      uint8_t *new_flags;
 
       new_buffers = MALLOC(new_max * sizeof(*new_buffers));
-      new_handles = MALLOC(new_max * sizeof(*new_handles));
-      new_flags = MALLOC(new_max * sizeof(*new_flags));
 
-      if (!new_buffers || !new_handles || !new_flags) {
+      if (!new_buffers) {
          fprintf(stderr, "amdgpu_do_add_buffer: allocation failed\n");
          FREE(new_buffers);
-         FREE(new_handles);
-         FREE(new_flags);
          return -1;
       }
 
       memcpy(new_buffers, cs->real_buffers, cs->num_real_buffers * sizeof(*new_buffers));
-      memcpy(new_handles, cs->handles, cs->num_real_buffers * sizeof(*new_handles));
-      memcpy(new_flags, cs->flags, cs->num_real_buffers * sizeof(*new_flags));
 
       FREE(cs->real_buffers);
-      FREE(cs->handles);
-      FREE(cs->flags);
 
       cs->max_real_buffers = new_max;
       cs->real_buffers = new_buffers;
-      cs->handles = new_handles;
-      cs->flags = new_flags;
    }
 
    idx = cs->num_real_buffers;
@@ -359,8 +347,6 @@ amdgpu_do_add_real_buffer(struct amdgpu_cs_context *cs, struct amdgpu_winsys_bo
 
    memset(buffer, 0, sizeof(*buffer));
    amdgpu_winsys_bo_reference(&buffer->bo, bo);
-   cs->handles[idx] = bo->bo;
-   cs->flags[idx] = 0;
    p_atomic_inc(&bo->num_cs_references);
    cs->num_real_buffers++;
 
@@ -482,7 +468,6 @@ static unsigned amdgpu_cs_add_buffer(struct radeon_winsys_cs *rcs,
    buffer = &cs->real_buffers[index];
    buffer->u.real.priority_usage |= 1llu << priority;
    buffer->usage |= usage;
-   cs->flags[index] = MAX2(cs->flags[index], priority / 4);
 
    cs->last_added_bo = bo;
    cs->last_added_bo_index = index;
@@ -1064,10 +1049,34 @@ void amdgpu_cs_submit_ib(void *job, int thread_index)
       free(handles);
       mtx_unlock(&ws->global_bo_list_lock);
    } else {
+      if (cs->max_real_submit < cs->num_real_buffers) {
+         FREE(cs->handles);
+         FREE(cs->flags);
+
+         cs->handles = MALLOC(sizeof(*cs->handles) * cs->num_real_buffers);
+         cs->flags = MALLOC(sizeof(*cs->flags) * cs->num_real_buffers);
+
+         if (!cs->handles || !cs->flags) {
+            cs->max_real_submit = 0;
+            r = -ENOMEM;
+            goto bo_list_error;
+         }
+      }
+
+      for (i = 0; i < cs->num_real_buffers; ++i) {
+         struct amdgpu_cs_buffer *buffer = &cs->real_buffers[i];
+
+         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;
+      }
+
       r = amdgpu_bo_list_create(ws->dev, cs->num_real_buffers,
                                 cs->handles, cs->flags,
                                 &cs->request.resources);
    }
+bo_list_error:
 
    if (r) {
       fprintf(stderr, "amdgpu: buffer list creation failed (%d)\n", r);
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
index 495d55bc23d..bdf7cb2b8eb 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
@@ -84,9 +84,11 @@ struct amdgpu_cs_context {
    /* Buffers. */
    unsigned                    max_real_buffers;
    unsigned                    num_real_buffers;
+   struct amdgpu_cs_buffer     *real_buffers;
+
+   unsigned                    max_real_submit;
    amdgpu_bo_handle            *handles;
    uint8_t                     *flags;
-   struct amdgpu_cs_buffer     *real_buffers;
 
    unsigned                    num_slab_buffers;
    unsigned                    max_slab_buffers;
-- 
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