freedreno: add helper to estimate # of bins per pipe

For vsc size calculation, we need to know the # of bins per pipe.  Or at
least the worst-case # of bins, assuming we don't eliminate an unused depth/
stencil buffer.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4750>

diff --git a/src/gallium/drivers/freedreno/freedreno_gmem.c b/src/gallium/drivers/freedreno/freedreno_gmem.c
index 0af7388fe065dfbf4c3de4c64e05ce91250f9586..fee9ea2d747d9fbc156fe77d32ec832380a47c64 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_gmem.c
+++ b/src/gallium/drivers/freedreno/freedreno_gmem.c
@@ -353,7 +353,7 @@ __fd_gmem_destroy(struct fd_gmem_stateobj *gmem)
 }
 
 static struct gmem_key *
-key_init(struct fd_batch *batch)
+gmem_key_init(struct fd_batch *batch, bool assume_zs)
 {
        struct fd_screen *screen = batch->ctx->screen;
        struct pipe_framebuffer_state *pfb = &batch->framebuffer;
@@ -361,7 +361,7 @@ key_init(struct fd_batch *batch)
                FD_GMEM_STENCIL_ENABLED | FD_GMEM_CLEARS_DEPTH_STENCIL));
        struct gmem_key *key = rzalloc(screen->gmem_cache.ht, struct gmem_key);
 
-       if (has_zs) {
+       if (has_zs || assume_zs) {
                struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
                key->zsbuf_cpp[0] = rsc->layout.cpp;
                if (rsc->stencil)
@@ -412,12 +412,12 @@ key_init(struct fd_batch *batch)
 }
 
 static struct fd_gmem_stateobj *
-lookup_gmem_state(struct fd_batch *batch)
+lookup_gmem_state(struct fd_batch *batch, bool assume_zs)
 {
        struct fd_screen *screen = batch->ctx->screen;
        struct fd_gmem_cache *cache = &screen->gmem_cache;
        struct fd_gmem_stateobj *gmem = NULL;
-       struct gmem_key *key = key_init(batch);
+       struct gmem_key *key = gmem_key_init(batch, assume_zs);
        uint32_t hash = gmem_key_hash(key);
 
        mtx_lock(&screen->lock);
@@ -610,7 +610,7 @@ fd_gmem_render_tiles(struct fd_batch *batch)
                render_sysmem(batch);
                ctx->stats.batch_sysmem++;
        } else {
-               struct fd_gmem_stateobj *gmem = lookup_gmem_state(batch);
+               struct fd_gmem_stateobj *gmem = lookup_gmem_state(batch, false);
                batch->gmem_state = gmem;
                fd_log(batch, "%p: rendering %dx%d tiles %ux%u (%s/%s)",
                        batch, pfb->width, pfb->height, gmem->nbins_x, gmem->nbins_y,
@@ -631,6 +631,24 @@ fd_gmem_render_tiles(struct fd_batch *batch)
        flush_ring(batch);
 }
 
+/* Determine a worst-case estimate (ie. assuming we don't eliminate an
+ * unused depth/stencil) number of bins per vsc pipe.
+ */
+unsigned
+fd_gmem_estimate_bins_per_pipe(struct fd_batch *batch)
+{
+       struct pipe_framebuffer_state *pfb = &batch->framebuffer;
+       struct fd_screen *screen = batch->ctx->screen;
+       struct fd_gmem_stateobj *gmem = lookup_gmem_state(batch, !!pfb->zsbuf);
+       unsigned nbins = gmem->maxpw * gmem->maxph;
+
+       mtx_lock(&screen->lock);
+       fd_gmem_reference(&gmem, NULL);
+       mtx_unlock(&screen->lock);
+
+       return nbins;
+}
+
 /* When deciding whether a tile needs mem2gmem, we need to take into
  * account the scissor rect(s) that were cleared.  To simplify we only
  * consider the last scissor rect for each buffer, since the common

diff --git a/src/gallium/drivers/freedreno/freedreno_gmem.h b/src/gallium/drivers/freedreno/freedreno_gmem.h
index 84b0172fa22cf5f728a901f4ea63ad7a8136c908..35fc9c30549a2395887fdcdafae3fa080ba50066 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_gmem.h
+++ b/src/gallium/drivers/freedreno/freedreno_gmem.h
@@ -88,7 +88,7 @@ struct fd_gmem_cache {
 struct fd_batch;
 
 void fd_gmem_render_tiles(struct fd_batch *batch);
-
+unsigned fd_gmem_estimate_bins_per_pipe(struct fd_batch *batch);
 bool fd_gmem_needs_restore(struct fd_batch *batch, const struct fd_tile *tile,
                uint32_t buffers);