agx: Add scissor upload BO

Not sure what the proper data structure for this is yet, but this will
hold over until we start optimizing for memory usage.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11084>

4 files changed, 15 insertions, 1 deletions

diff --git a/src/gallium/drivers/asahi/agx_pipe.c b/src/gallium/drivers/asahi/agx_pipe.c
index cae9cbdc787..e6c82733d71 100644
--- a/src/gallium/drivers/asahi/agx_pipe.c
+++ b/src/gallium/drivers/asahi/agx_pipe.c
@@ -396,6 +396,7 @@ agx_flush(struct pipe_context *pctx,
    struct agx_batch *batch = ctx->batch;
 
    agx_batch_add_bo(batch, batch->encoder);
+   agx_batch_add_bo(batch, batch->scissor.bo);
    agx_batch_add_bo(batch, dev->internal.bo);
 
    for (unsigned i = 0; i < batch->nr_cbufs; ++i) {
@@ -439,6 +440,7 @@ agx_flush(struct pipe_context *pctx,
                dev->cmdbuf.size,
                &ctx->batch->pool,
                ctx->batch->encoder->ptr.gpu,
+               ctx->batch->scissor.bo->ptr.gpu,
                ctx->batch->width,
                ctx->batch->height,
                pipeline_null.gpu,
@@ -463,6 +465,7 @@ agx_flush(struct pipe_context *pctx,
    ctx->batch->clear = 0;
    ctx->batch->draw = 0;
    ctx->batch->encoder_current = ctx->batch->encoder->ptr.cpu;
+   ctx->batch->scissor.count = 0;
    ctx->dirty = ~0;
 }
 
@@ -501,6 +504,7 @@ agx_create_context(struct pipe_screen *screen,
                  agx_device(screen), AGX_MEMORY_TYPE_SHADER, true);
    ctx->batch->encoder = agx_bo_create(agx_device(screen), 0x80000, AGX_MEMORY_TYPE_FRAMEBUFFER);
    ctx->batch->encoder_current = ctx->batch->encoder->ptr.cpu;
+   ctx->batch->scissor.bo = agx_bo_create(agx_device(screen), 0x80000, AGX_MEMORY_TYPE_FRAMEBUFFER);
 
    /* Upload fixed shaders (TODO: compile them?) */
 
diff --git a/src/gallium/drivers/asahi/agx_state.h b/src/gallium/drivers/asahi/agx_state.h
index 2a6735c059f..420eeec496f 100644
--- a/src/gallium/drivers/asahi/agx_state.h
+++ b/src/gallium/drivers/asahi/agx_state.h
@@ -74,6 +74,12 @@ struct agx_stage {
    unsigned texture_count;
 };
 
+/* Uploaded scissor descriptors */
+struct agx_scissors {
+      struct agx_bo *bo;
+      unsigned count;
+};
+
 struct agx_batch {
    unsigned width, height, nr_cbufs;
    struct pipe_surface *cbufs[8];
@@ -91,6 +97,8 @@ struct agx_batch {
    struct agx_pool pool, pipeline_pool;
    struct agx_bo *encoder;
    uint8_t *encoder_current;
+
+   struct agx_scissors scissor;
 };
 
 struct agx_zsa {
diff --git a/src/gallium/drivers/asahi/magic.c b/src/gallium/drivers/asahi/magic.c
index 490f62d3557..66057ffd446 100644
--- a/src/gallium/drivers/asahi/magic.c
+++ b/src/gallium/drivers/asahi/magic.c
@@ -55,6 +55,7 @@ void
 demo_cmdbuf(uint64_t *buf, size_t size,
             struct agx_pool *pool,
             uint64_t encoder_ptr,
+            uint64_t scissor_ptr,
             unsigned width, unsigned height,
             uint32_t pipeline_null,
             uint32_t pipeline_clear,
@@ -135,7 +136,7 @@ demo_cmdbuf(uint64_t *buf, size_t size,
    EMIT32(cmdbuf, 0);
    EMIT32(cmdbuf, 0x12);
    EMIT64(cmdbuf, pipeline_store | 0x4);
-   EMIT64(cmdbuf, demo_zero(pool, 0x1000)); // Pointer to scissor descriptor
+   EMIT64(cmdbuf, scissor_ptr);
    EMIT64(cmdbuf, demo_zero(pool, 0x1000));
    EMIT64(cmdbuf, 0);
 
diff --git a/src/gallium/drivers/asahi/magic.h b/src/gallium/drivers/asahi/magic.h
index 25b79b004b2..61c4795b48b 100644
--- a/src/gallium/drivers/asahi/magic.h
+++ b/src/gallium/drivers/asahi/magic.h
@@ -2,6 +2,7 @@ void
 demo_cmdbuf(uint64_t *buf, size_t size,
             struct agx_pool *pool,
             uint64_t encoder_ptr,
+            uint64_t scissor_ptr,
             unsigned width, unsigned height,
             uint32_t pipeline_null,
             uint32_t pipeline_clear,