Nouveau - Sep 2015 - [PATCH] nv50, nvc0: flush texture cache in presence of coherent bufs

This fixes the newly-added arb_texture_buffer_object-bufferstorage
piglit test.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "11.0" <mesa-stable at lists.freedesktop.org>
---
 src/gallium/drivers/nouveau/nv50/nv50_vbo.c | 19 +++++++++++++++++++
 src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c | 20 ++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
b/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
index e798473..f5f4708 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
@@ -768,6 +768,7 @@ nv50_draw_vbo(struct pipe_context *pipe, const struct
pipe_draw_info *info)
 {
    struct nv50_context *nv50 = nv50_context(pipe);
    struct nouveau_pushbuf *push = nv50->base.pushbuf;
+   bool tex_dirty = false;
    int i, s;
 
    /* NOTE: caller must ensure that (min_index + index_bias) is >= 0 */
@@ -797,6 +798,9 @@ nv50_draw_vbo(struct pipe_context *pipe, const struct
pipe_draw_info *info)
 
    push->kick_notify = nv50_draw_vbo_kick_notify;
 
+   /* TODO: Instead of iterating over all the buffer resources looking for
+    * coherent buffers, keep track of a context-wide count.
+    */
    for (s = 0; s < 3 && !nv50->cb_dirty; ++s) {
       uint32_t valid = nv50->constbuf_valid[s];
 
@@ -824,6 +828,21 @@ nv50_draw_vbo(struct pipe_context *pipe, const struct
pipe_draw_info *info)
       nv50->cb_dirty = false;
    }
 
+   for (s = 0; s < 3 && !tex_dirty; ++s) {
+      for (i = 0; i < nv50->num_textures[s] && !tex_dirty; ++i) {
+         if (!nv50->textures[s][i] ||
+             nv50->textures[s][i]->texture->target != PIPE_BUFFER)
+            continue;
+         if (nv50->textures[s][i]->texture->flags &
+             PIPE_RESOURCE_FLAG_MAP_COHERENT)
+            tex_dirty = true;
+      }
+   }
+   if (tex_dirty) {
+      BEGIN_NV04(push, NV50_3D(TEX_CACHE_CTL), 1);
+      PUSH_DATA (push, 0x20);
+   }
+
    if (nv50->vbo_fifo) {
       nv50_push_vbo(nv50, info);
       push->kick_notify = nv50_default_kick_notify;
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
index 6f9e790..188c7d7 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
@@ -899,6 +899,9 @@ nvc0_draw_vbo(struct pipe_context *pipe, const struct
pipe_draw_info *info)
 
    push->kick_notify = nvc0_draw_vbo_kick_notify;
 
+   /* TODO: Instead of iterating over all the buffer resources looking for
+    * coherent buffers, keep track of a context-wide count.
+    */
    for (s = 0; s < 5 && !nvc0->cb_dirty; ++s) {
       uint32_t valid = nvc0->constbuf_valid[s];
 
@@ -924,6 +927,23 @@ nvc0_draw_vbo(struct pipe_context *pipe, const struct
pipe_draw_info *info)
       nvc0->cb_dirty = false;
    }
 
+   for (s = 0; s < 5; ++s) {
+      for (int i = 0; i < nvc0->num_textures[s]; ++i) {
+         struct nv50_tic_entry *tic = nv50_tic_entry(nvc0->textures[s][i]);
+         struct pipe_resource *res;
+         if (!tic)
+            continue;
+         res = nvc0->textures[s][i]->texture;
+         if (res->target != PIPE_BUFFER ||
+             !(res->flags & PIPE_RESOURCE_FLAG_MAP_COHERENT))
+            continue;
+
+         BEGIN_NVC0(push, NVC0_3D(TEX_CACHE_CTL), 1);
+         PUSH_DATA (push, (tic->id << 4) | 1);
+         NOUVEAU_DRV_STAT(&nvc0->screen->base, tex_cache_flush_count,
1);
+      }
+   }
+
    if (nvc0->state.vbo_mode) {
       nvc0_push_vbo(nvc0, info);
       push->kick_notify = nvc0_default_kick_notify;
-- 
2.4.6