asahi: Clamp texture buffer sizes

Per the spec / freedreno. Fixes
arb_texture_buffer_object-texture-buffer-size-clamp

Fixes: 6b22a02f908 ("asahi,agx: Implement buffer textures with gnarly NIR")
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22353>

diff --git a/src/gallium/drivers/asahi/agx_pipe.c b/src/gallium/drivers/asahi/agx_pipe.c
index 3822b3d..74aac88 100644 (file)
--- a/src/gallium/drivers/asahi/agx_pipe.c
+++ b/src/gallium/drivers/asahi/agx_pipe.c
@@ -1425,9 +1425,8 @@ agx_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
       return 16;
 
-   /* Texel buffers lowered to (at most) 1024x16384 2D textures */
    case PIPE_CAP_MAX_TEXEL_BUFFER_ELEMENTS_UINT:
-      return 1024 * 16384;
+      return AGX_TEXTURE_BUFFER_MAX_SIZE;
 
    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
       return 64;

diff --git a/src/gallium/drivers/asahi/agx_state.c b/src/gallium/drivers/asahi/agx_state.c
index 2211763..b85a290 100644 (file)
--- a/src/gallium/drivers/asahi/agx_state.c
+++ b/src/gallium/drivers/asahi/agx_state.c
@@ -702,7 +702,7 @@ agx_pack_texture(void *out, struct agx_resource *rsrc,
 
       if (state->target == PIPE_BUFFER) {
          unsigned size_el =
-            state->u.buf.size / util_format_get_blocksize(format);
+            agx_texture_buffer_size_el(format, state->u.buf.size);
 
          /* Use a 2D texture to increase the maximum size */
          cfg.width = 1024;

diff --git a/src/gallium/drivers/asahi/agx_state.h b/src/gallium/drivers/asahi/agx_state.h
index b9c23f9..78185e5 100644 (file)
--- a/src/gallium/drivers/asahi/agx_state.h
+++ b/src/gallium/drivers/asahi/agx_state.h
@@ -693,4 +693,18 @@ agx_render_condition_check(struct agx_context *ctx)
       return agx_render_condition_check_inner(ctx);
 }
 
+/* Texel buffers lowered to (at most) 1024x16384 2D textures */
+#define AGX_TEXTURE_BUFFER_WIDTH      1024
+#define AGX_TEXTURE_BUFFER_MAX_HEIGHT 16384
+#define AGX_TEXTURE_BUFFER_MAX_SIZE                                            \
+   (AGX_TEXTURE_BUFFER_WIDTH * AGX_TEXTURE_BUFFER_MAX_HEIGHT)
+
+static inline uint32_t
+agx_texture_buffer_size_el(enum pipe_format format, uint32_t size)
+{
+   unsigned blocksize = util_format_get_blocksize(format);
+
+   return MIN2(AGX_TEXTURE_BUFFER_MAX_SIZE, size / blocksize);
+}
+
 #endif