Nouveau - Sep 2015 - [PATCH v2] nv50, nvc0: detect underlying resource changes and update tic

When updating texture buffers, we might end up replacing the whole
buffer. Check that the tic address matches the resource address, and if
not, update the tic and reupload it.

This fixes:
  arb_direct_state_access-texture-buffer
  arb_texture_buffer_object-data-sync

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "11.0" <mesa-stable at lists.freedesktop.org>
---

v1 -> v2: take the sampler view's first_element into account, unbreaks
ranges

 src/gallium/drivers/nouveau/nv50/nv50_tex.c | 21 +++++++++++++++++++++
 src/gallium/drivers/nouveau/nvc0/nvc0_tex.c | 22 ++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_tex.c
b/src/gallium/drivers/nouveau/nv50/nv50_tex.c
index fc6374d..6083ea9 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_tex.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_tex.c
@@ -221,6 +221,26 @@ nv50_create_texture_view(struct pipe_context *pipe,
    return &view->pipe;
 }
 
+static void
+nv50_update_tic(struct nv50_context *nv50, struct nv50_tic_entry *tic,
+                struct nv04_resource *res)
+{
+   uint64_t address = res->address;
+   if (res->base.target != PIPE_BUFFER)
+      return;
+   address += tic->pipe.u.buf.first_element *
+      util_format_get_blocksize(tic->pipe.format);
+   if (tic->tic[1] == (uint32_t)address &&
+       (tic->tic[2] & 0xff) == address >> 32)
+      return;
+
+   nv50_screen_tic_unlock(nv50->screen, tic);
+   tic->id = -1;
+   tic->tic[1] = address;
+   tic->tic[2] &= 0xffffff00;
+   tic->tic[2] |= address >> 32;
+}
+
 static bool
 nv50_validate_tic(struct nv50_context *nv50, int s)
 {
@@ -240,6 +260,7 @@ nv50_validate_tic(struct nv50_context *nv50, int s)
          continue;
       }
       res = &nv50_miptree(tic->pipe.texture)->base;
+      nv50_update_tic(nv50, tic, res);
 
       if (tic->id < 0) {
          tic->id = nv50_screen_tic_alloc(nv50->screen, tic);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
b/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
index d19082e..2dd100f 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
@@ -226,6 +226,26 @@ nvc0_create_texture_view(struct pipe_context *pipe,
    return &view->pipe;
 }
 
+static void
+nvc0_update_tic(struct nvc0_context *nvc0, struct nv50_tic_entry *tic,
+                struct nv04_resource *res)
+{
+   uint64_t address = res->address;
+   if (res->base.target != PIPE_BUFFER)
+      return;
+   address += tic->pipe.u.buf.first_element *
+      util_format_get_blocksize(tic->pipe.format);
+   if (tic->tic[1] == (uint32_t)address &&
+       (tic->tic[2] & 0xff) == address >> 32)
+      return;
+
+   nvc0_screen_tic_unlock(nvc0->screen, tic);
+   tic->id = -1;
+   tic->tic[1] = address;
+   tic->tic[2] &= 0xffffff00;
+   tic->tic[2] |= address >> 32;
+}
+
 static bool
 nvc0_validate_tic(struct nvc0_context *nvc0, int s)
 {
@@ -247,6 +267,7 @@ nvc0_validate_tic(struct nvc0_context *nvc0, int s)
          continue;
       }
       res = nv04_resource(tic->pipe.texture);
+      nvc0_update_tic(nvc0, tic, res);
 
       if (tic->id < 0) {
          tic->id = nvc0_screen_tic_alloc(nvc0->screen, tic);
@@ -313,6 +334,7 @@ nve4_validate_tic(struct nvc0_context *nvc0, unsigned s)
          continue;
       }
       res = nv04_resource(tic->pipe.texture);
+      nvc0_update_tic(nvc0, tic, res);
 
       if (tic->id < 0) {
          tic->id = nvc0_screen_tic_alloc(nvc0->screen, tic);
-- 
2.4.6