freedreno/gmem: add div_align() helper
[mesa.git] / src / gallium / drivers / freedreno / freedreno_gmem.c
index 41fc1d0a0d4e109c83f5297903fa06144feb9a71..7110e2a74851afaf3badae8365e850da9d156172 100644 (file)
  */
 
 #include "pipe/p_state.h"
+#include "util/hash_table.h"
+#include "util/u_dump.h"
 #include "util/u_string.h"
 #include "util/u_memory.h"
 #include "util/u_inlines.h"
-#include "util/u_format.h"
+#include "util/format/u_format.h"
 
 #include "freedreno_gmem.h"
 #include "freedreno_context.h"
 #include "freedreno_fence.h"
+#include "freedreno_log.h"
 #include "freedreno_resource.h"
 #include "freedreno_query_hw.h"
 #include "freedreno_util.h"
  * resolve.
  */
 
+#define BIN_DEBUG 0
+
+/*
+ * GMEM Cache:
+ *
+ * Caches GMEM state based on a given framebuffer state.  The key is
+ * meant to be the minimal set of data that results in a unique gmem
+ * configuration, avoiding multiple keys arriving at the same gmem
+ * state.  For example, the render target format is not part of the
+ * key, only the size per pixel.  And the max_scissor bounds is not
+ * part of they key, only the minx/miny (after clamping to tile
+ * alignment) and width/height.  This ensures that slightly different
+ * max_scissor which would result in the same gmem state, do not
+ * become different keys that map to the same state.
+ */
+
+struct gmem_key {
+       uint16_t minx, miny;
+       uint16_t width, height;
+       uint8_t gmem_page_align;      /* alignment in multiples of 0x1000 to reduce key size */
+       uint8_t nr_cbufs;
+       uint8_t cbuf_cpp[MAX_RENDER_TARGETS];
+       uint8_t zsbuf_cpp[2];
+};
+
+static uint32_t
+gmem_key_hash(const void *_key)
+{
+       const struct gmem_key *key = _key;
+       return _mesa_hash_data(key, sizeof(*key));
+}
+
+static bool
+gmem_key_equals(const void *_a, const void *_b)
+{
+       const struct gmem_key *a = _a;
+       const struct gmem_key *b = _b;
+       return memcmp(a, b, sizeof(*a)) == 0;
+}
+
 static uint32_t bin_width(struct fd_screen *screen)
 {
        if (is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen))
@@ -75,149 +118,104 @@ static uint32_t bin_width(struct fd_screen *screen)
        return 512;
 }
 
+static unsigned
+div_align(unsigned num, unsigned denom, unsigned al)
+{
+       return align(DIV_ROUND_UP(num, denom), al);
+}
+
 static uint32_t
-total_size(uint8_t cbuf_cpp[], uint8_t zsbuf_cpp[2],
-                  uint32_t bin_w, uint32_t bin_h, uint32_t gmem_align,
-                  struct fd_gmem_stateobj *gmem)
+total_size(struct gmem_key *key, uint32_t bin_w, uint32_t bin_h,
+               struct fd_gmem_stateobj *gmem)
 {
+       uint32_t gmem_align = key->gmem_page_align * 0x1000;
        uint32_t total = 0, i;
 
        for (i = 0; i < MAX_RENDER_TARGETS; i++) {
-               if (cbuf_cpp[i]) {
+               if (key->cbuf_cpp[i]) {
                        gmem->cbuf_base[i] = align(total, gmem_align);
-                       total = gmem->cbuf_base[i] + cbuf_cpp[i] * bin_w * bin_h;
+                       total = gmem->cbuf_base[i] + key->cbuf_cpp[i] * bin_w * bin_h;
                }
        }
 
-       if (zsbuf_cpp[0]) {
+       if (key->zsbuf_cpp[0]) {
                gmem->zsbuf_base[0] = align(total, gmem_align);
-               total = gmem->zsbuf_base[0] + zsbuf_cpp[0] * bin_w * bin_h;
+               total = gmem->zsbuf_base[0] + key->zsbuf_cpp[0] * bin_w * bin_h;
        }
 
-       if (zsbuf_cpp[1]) {
+       if (key->zsbuf_cpp[1]) {
                gmem->zsbuf_base[1] = align(total, gmem_align);
-               total = gmem->zsbuf_base[1] + zsbuf_cpp[1] * bin_w * bin_h;
+               total = gmem->zsbuf_base[1] + key->zsbuf_cpp[1] * bin_w * bin_h;
        }
 
        return total;
 }
 
-static void
-calculate_tiles(struct fd_batch *batch)
+static struct fd_gmem_stateobj *
+gmem_stateobj_init(struct fd_screen *screen, struct gmem_key *key)
 {
-       struct fd_context *ctx = batch->ctx;
-       struct fd_screen *screen = ctx->screen;
-       struct fd_gmem_stateobj *gmem = &ctx->gmem;
-       struct pipe_scissor_state *scissor = &batch->max_scissor;
-       struct pipe_framebuffer_state *pfb = &batch->framebuffer;
+       struct fd_gmem_stateobj *gmem =
+                       rzalloc(screen->gmem_cache.ht, struct fd_gmem_stateobj);
+       pipe_reference_init(&gmem->reference, 1);
+       gmem->screen = screen;
+       gmem->key = key;
+       list_inithead(&gmem->node);
+
        const uint32_t gmem_alignw = screen->gmem_alignw;
        const uint32_t gmem_alignh = screen->gmem_alignh;
        const unsigned npipes = screen->num_vsc_pipes;
        const uint32_t gmem_size = screen->gmemsize_bytes;
-       uint32_t minx, miny, width, height;
        uint32_t nbins_x = 1, nbins_y = 1;
        uint32_t bin_w, bin_h;
-       uint32_t gmem_align = 0x4000;
        uint32_t max_width = bin_width(screen);
-       uint8_t cbuf_cpp[MAX_RENDER_TARGETS] = {0}, zsbuf_cpp[2] = {0};
        uint32_t i, j, t, xoff, yoff;
        uint32_t tpp_x, tpp_y;
-       bool has_zs = !!(batch->gmem_reason & (FD_GMEM_DEPTH_ENABLED |
-               FD_GMEM_STENCIL_ENABLED | FD_GMEM_CLEARS_DEPTH_STENCIL));
        int tile_n[npipes];
 
-       if (has_zs) {
-               struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
-               zsbuf_cpp[0] = rsc->cpp;
-               if (rsc->stencil)
-                       zsbuf_cpp[1] = rsc->stencil->cpp;
-       } else {
-               /* we might have a zsbuf, but it isn't used */
-               batch->restore &= ~(FD_BUFFER_DEPTH | FD_BUFFER_STENCIL);
-               batch->resolve &= ~(FD_BUFFER_DEPTH | FD_BUFFER_STENCIL);
-       }
-       for (i = 0; i < pfb->nr_cbufs; i++) {
-               if (pfb->cbufs[i])
-                       cbuf_cpp[i] = util_format_get_blocksize(pfb->cbufs[i]->format);
-               else
-                       cbuf_cpp[i] = 4;
-               /* if MSAA, color buffers are super-sampled in GMEM: */
-               cbuf_cpp[i] *= pfb->samples;
-       }
-
-       if (!memcmp(gmem->zsbuf_cpp, zsbuf_cpp, sizeof(zsbuf_cpp)) &&
-               !memcmp(gmem->cbuf_cpp, cbuf_cpp, sizeof(cbuf_cpp)) &&
-               !memcmp(&gmem->scissor, scissor, sizeof(gmem->scissor))) {
-               /* everything is up-to-date */
-               return;
-       }
-
-       if (fd_mesa_debug & FD_DBG_NOSCIS) {
-               minx = 0;
-               miny = 0;
-               width = pfb->width;
-               height = pfb->height;
-       } else {
-               /* round down to multiple of alignment: */
-               minx = scissor->minx & ~(gmem_alignw - 1);
-               miny = scissor->miny & ~(gmem_alignh - 1);
-               width = scissor->maxx - minx;
-               height = scissor->maxy - miny;
-       }
-
-       bin_w = align(width, gmem_alignw);
-       bin_h = align(height, gmem_alignh);
+       bin_w = div_align(key->width, 1, gmem_alignw);
+       bin_h = div_align(key->height, 1, gmem_alignh);
 
        /* first, find a bin width that satisfies the maximum width
         * restrictions:
         */
        while (bin_w > max_width) {
                nbins_x++;
-               bin_w = align(width / nbins_x, gmem_alignw);
+               bin_w = div_align(key->width, nbins_x, gmem_alignw);
        }
 
        if (fd_mesa_debug & FD_DBG_MSGS) {
                debug_printf("binning input: cbuf cpp:");
-               for (i = 0; i < pfb->nr_cbufs; i++)
-                       debug_printf(" %d", cbuf_cpp[i]);
+               for (i = 0; i < key->nr_cbufs; i++)
+                       debug_printf(" %d", key->cbuf_cpp[i]);
                debug_printf(", zsbuf cpp: %d; %dx%d\n",
-                               zsbuf_cpp[0], width, height);
-       }
-
-       if (is_a20x(screen) && batch->cleared) {
-               /* under normal circumstances the requirement would be 4K
-                * but the fast clear path requires an alignment of 32K
-                */
-               gmem_align = 0x8000;
+                               key->zsbuf_cpp[0], key->width, key->height);
        }
 
        /* then find a bin width/height that satisfies the memory
         * constraints:
         */
-       while (total_size(cbuf_cpp, zsbuf_cpp, bin_w, bin_h, gmem_align, gmem) >
-                  gmem_size) {
+       while (total_size(key, bin_w, bin_h, gmem) > gmem_size) {
                if (bin_w > bin_h) {
                        nbins_x++;
-                       bin_w = align(width / nbins_x, gmem_alignw);
+                       bin_w = div_align(key->width, nbins_x, gmem_alignw);
                } else {
                        nbins_y++;
-                       bin_h = align(height / nbins_y, gmem_alignh);
+                       bin_h = div_align(key->height, nbins_y, gmem_alignh);
                }
        }
 
        DBG("using %d bins of size %dx%d", nbins_x*nbins_y, bin_w, bin_h);
 
-       gmem->scissor = *scissor;
-       memcpy(gmem->cbuf_cpp, cbuf_cpp, sizeof(cbuf_cpp));
-       memcpy(gmem->zsbuf_cpp, zsbuf_cpp, sizeof(zsbuf_cpp));
+       memcpy(gmem->cbuf_cpp, key->cbuf_cpp, sizeof(key->cbuf_cpp));
+       memcpy(gmem->zsbuf_cpp, key->zsbuf_cpp, sizeof(key->zsbuf_cpp));
        gmem->bin_h = bin_h;
        gmem->bin_w = bin_w;
        gmem->nbins_x = nbins_x;
        gmem->nbins_y = nbins_y;
-       gmem->minx = minx;
-       gmem->miny = miny;
-       gmem->width = width;
-       gmem->height = height;
+       gmem->minx = key->minx;
+       gmem->miny = key->miny;
+       gmem->width = key->width;
+       gmem->height = key->height;
 
        /*
         * Assign tiles and pipes:
@@ -229,7 +227,7 @@ calculate_tiles(struct fd_batch *batch)
 
 #define div_round_up(v, a)  (((v) + (a) - 1) / (a))
        /* figure out number of tiles per pipe: */
-       if (is_a20x(ctx->screen)) {
+       if (is_a20x(screen)) {
                /* for a20x we want to minimize the number of "pipes"
                 * binning data has 3 bits for x/y (8x8) but the edges are used to
                 * cull off-screen vertices with hw binning, so we have 6x6 pipes
@@ -238,10 +236,10 @@ calculate_tiles(struct fd_batch *batch)
                tpp_y = 6;
        } else {
                tpp_x = tpp_y = 1;
-               while (div_round_up(nbins_y, tpp_y) > screen->num_vsc_pipes)
+               while (div_round_up(nbins_y, tpp_y) > npipes)
                        tpp_y += 2;
                while ((div_round_up(nbins_y, tpp_y) *
-                               div_round_up(nbins_x, tpp_x)) > screen->num_vsc_pipes)
+                               div_round_up(nbins_x, tpp_x)) > npipes)
                        tpp_x += 1;
        }
 
@@ -251,7 +249,7 @@ calculate_tiles(struct fd_batch *batch)
        /* configure pipes: */
        xoff = yoff = 0;
        for (i = 0; i < npipes; i++) {
-               struct fd_vsc_pipe *pipe = &ctx->vsc_pipe[i];
+               struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[i];
 
                if (xoff >= nbins_x) {
                        xoff = 0;
@@ -274,44 +272,44 @@ calculate_tiles(struct fd_batch *batch)
        gmem->num_vsc_pipes = MAX2(1, i);
 
        for (; i < npipes; i++) {
-               struct fd_vsc_pipe *pipe = &ctx->vsc_pipe[i];
+               struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[i];
                pipe->x = pipe->y = pipe->w = pipe->h = 0;
        }
 
-#if 0 /* debug */
-       printf("%dx%d ... tpp=%dx%d\n", nbins_x, nbins_y, tpp_x, tpp_y);
-       for (i = 0; i < 8; i++) {
-               struct fd_vsc_pipe *pipe = &ctx->pipe[i];
-               printf("pipe[%d]: %ux%u @ %u,%u\n", i,
-                               pipe->w, pipe->h, pipe->x, pipe->y);
+       if (BIN_DEBUG) {
+               printf("%dx%d ... tpp=%dx%d\n", nbins_x, nbins_y, tpp_x, tpp_y);
+               for (i = 0; i < ARRAY_SIZE(gmem->vsc_pipe); i++) {
+                       struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[i];
+                       printf("pipe[%d]: %ux%u @ %u,%u\n", i,
+                                       pipe->w, pipe->h, pipe->x, pipe->y);
+               }
        }
-#endif
 
        /* configure tiles: */
        t = 0;
-       yoff = miny;
+       yoff = key->miny;
        memset(tile_n, 0, sizeof(tile_n));
        for (i = 0; i < nbins_y; i++) {
                uint32_t bw, bh;
 
-               xoff = minx;
+               xoff = key->minx;
 
                /* clip bin height: */
-               bh = MIN2(bin_h, miny + height - yoff);
+               bh = MIN2(bin_h, key->miny + key->height - yoff);
 
                for (j = 0; j < nbins_x; j++) {
-                       struct fd_tile *tile = &ctx->tile[t];
+                       struct fd_tile *tile = &gmem->tile[t];
                        uint32_t p;
 
-                       assert(t < ARRAY_SIZE(ctx->tile));
+                       assert(t < ARRAY_SIZE(gmem->tile));
 
                        /* pipe number: */
                        p = ((i / tpp_y) * div_round_up(nbins_x, tpp_x)) + (j / tpp_x);
                        assert(p < gmem->num_vsc_pipes);
 
                        /* clip bin width: */
-                       bw = MIN2(bin_w, minx + width - xoff);
-                       tile->n = !is_a20x(ctx->screen) ? tile_n[p]++ :
+                       bw = MIN2(bin_w, key->minx + key->width - xoff);
+                       tile->n = !is_a20x(screen) ? tile_n[p]++ :
                                ((i % tpp_y + 1) << 3 | (j % tpp_x + 1));
                        tile->p = p;
                        tile->bin_w = bw;
@@ -319,6 +317,11 @@ calculate_tiles(struct fd_batch *batch)
                        tile->xoff = xoff;
                        tile->yoff = yoff;
 
+                       if (BIN_DEBUG) {
+                               printf("tile[%d]: p=%u, bin=%ux%u+%u+%u\n", t,
+                                               p, bw, bh, xoff, yoff);
+                       }
+
                        t++;
 
                        xoff += bw;
@@ -327,34 +330,155 @@ calculate_tiles(struct fd_batch *batch)
                yoff += bh;
        }
 
-#if 0 /* debug */
-       t = 0;
-       for (i = 0; i < nbins_y; i++) {
-               for (j = 0; j < nbins_x; j++) {
-                       struct fd_tile *tile = &ctx->tile[t++];
-                       printf("|p:%u n:%u|", tile->p, tile->n);
+       if (BIN_DEBUG) {
+               t = 0;
+               for (i = 0; i < nbins_y; i++) {
+                       for (j = 0; j < nbins_x; j++) {
+                               struct fd_tile *tile = &gmem->tile[t++];
+                               printf("|p:%u n:%u|", tile->p, tile->n);
+                       }
+                       printf("\n");
                }
-               printf("\n");
        }
-#endif
+
+       return gmem;
+}
+
+void
+__fd_gmem_destroy(struct fd_gmem_stateobj *gmem)
+{
+       struct fd_gmem_cache *cache = &gmem->screen->gmem_cache;
+
+       fd_screen_assert_locked(gmem->screen);
+
+       _mesa_hash_table_remove_key(cache->ht, gmem->key);
+       list_del(&gmem->node);
+
+       ralloc_free(gmem->key);
+       ralloc_free(gmem);
+}
+
+static struct gmem_key *
+gmem_key_init(struct fd_batch *batch, bool assume_zs, bool no_scis_opt)
+{
+       struct fd_screen *screen = batch->ctx->screen;
+       struct pipe_framebuffer_state *pfb = &batch->framebuffer;
+       bool has_zs = pfb->zsbuf && !!(batch->gmem_reason & (FD_GMEM_DEPTH_ENABLED |
+               FD_GMEM_STENCIL_ENABLED | FD_GMEM_CLEARS_DEPTH_STENCIL));
+       struct gmem_key *key = rzalloc(screen->gmem_cache.ht, struct gmem_key);
+
+       if (has_zs || assume_zs) {
+               struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
+               key->zsbuf_cpp[0] = rsc->layout.cpp;
+               if (rsc->stencil)
+                       key->zsbuf_cpp[1] = rsc->stencil->layout.cpp;
+       } else {
+               /* we might have a zsbuf, but it isn't used */
+               batch->restore &= ~(FD_BUFFER_DEPTH | FD_BUFFER_STENCIL);
+               batch->resolve &= ~(FD_BUFFER_DEPTH | FD_BUFFER_STENCIL);
+       }
+
+       key->nr_cbufs = pfb->nr_cbufs;
+       for (unsigned i = 0; i < pfb->nr_cbufs; i++) {
+               if (pfb->cbufs[i])
+                       key->cbuf_cpp[i] = util_format_get_blocksize(pfb->cbufs[i]->format);
+               else
+                       key->cbuf_cpp[i] = 4;
+               /* if MSAA, color buffers are super-sampled in GMEM: */
+               key->cbuf_cpp[i] *= pfb->samples;
+       }
+
+       if ((fd_mesa_debug & FD_DBG_NOSCIS) || no_scis_opt) {
+               key->minx = 0;
+               key->miny = 0;
+               key->width = pfb->width;
+               key->height = pfb->height;
+       } else {
+               struct pipe_scissor_state *scissor = &batch->max_scissor;
+
+               /* round down to multiple of alignment: */
+               key->minx = scissor->minx & ~(screen->gmem_alignw - 1);
+               key->miny = scissor->miny & ~(screen->gmem_alignh - 1);
+               key->width = scissor->maxx - key->minx;
+               key->height = scissor->maxy - key->miny;
+       }
+
+       if (is_a20x(screen) && batch->cleared) {
+               /* under normal circumstances the requirement would be 4K
+                * but the fast clear path requires an alignment of 32K
+                */
+               key->gmem_page_align = 8;
+       } else {
+               // TODO re-check this across gens.. maybe it should only
+               // be a single page in some cases:
+               key->gmem_page_align = 4;
+       }
+
+       return key;
 }
 
+static struct fd_gmem_stateobj *
+lookup_gmem_state(struct fd_batch *batch, bool assume_zs, bool no_scis_opt)
+{
+       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 = gmem_key_init(batch, assume_zs, no_scis_opt);
+       uint32_t hash = gmem_key_hash(key);
+
+       fd_screen_lock(screen);
+
+       struct hash_entry *entry =
+               _mesa_hash_table_search_pre_hashed(cache->ht, hash, key);
+       if (entry) {
+               ralloc_free(key);
+               goto found;
+       }
+
+       /* limit the # of cached gmem states, discarding the least
+        * recently used state if needed:
+        */
+       if (cache->ht->entries >= 20) {
+               struct fd_gmem_stateobj *last =
+                       list_last_entry(&cache->lru, struct fd_gmem_stateobj, node);
+               fd_gmem_reference(&last, NULL);
+       }
+
+       entry = _mesa_hash_table_insert_pre_hashed(cache->ht,
+                       hash, key, gmem_stateobj_init(screen, key));
+
+found:
+       fd_gmem_reference(&gmem, entry->data);
+       /* Move to the head of the LRU: */
+       list_delinit(&gmem->node);
+       list_add(&gmem->node, &cache->lru);
+
+       fd_screen_unlock(screen);
+
+       return gmem;
+}
+
+/*
+ * GMEM render pass
+ */
+
 static void
-render_tiles(struct fd_batch *batch)
+render_tiles(struct fd_batch *batch, struct fd_gmem_stateobj *gmem)
 {
        struct fd_context *ctx = batch->ctx;
-       struct fd_gmem_stateobj *gmem = &ctx->gmem;
        int i;
 
+       mtx_lock(&ctx->gmem_lock);
+
        ctx->emit_tile_init(batch);
 
        if (batch->restore)
                ctx->stats.batch_restore++;
 
        for (i = 0; i < (gmem->nbins_x * gmem->nbins_y); i++) {
-               struct fd_tile *tile = &ctx->tile[i];
+               struct fd_tile *tile = &gmem->tile[i];
 
-               DBG("bin_h=%d, yoff=%d, bin_w=%d, xoff=%d",
+               fd_log(batch, "bin_h=%d, yoff=%d, bin_w=%d, xoff=%d",
                        tile->bin_h, tile->yoff, tile->bin_w, tile->xoff);
 
                ctx->emit_tile_prep(batch, tile);
@@ -369,7 +493,13 @@ render_tiles(struct fd_batch *batch)
                        ctx->query_prepare_tile(batch, i, batch->gmem);
 
                /* emit IB to drawcmds: */
-               ctx->emit_ib(batch->gmem, batch->draw);
+               fd_log(batch, "TILE[%d]: START DRAW IB", i);
+               if (ctx->emit_tile) {
+                       ctx->emit_tile(batch, tile);
+               } else {
+                       ctx->screen->emit_ib(batch->gmem, batch->draw);
+               }
+               fd_log(batch, "TILE[%d]: END DRAW IB", i);
                fd_reset_wfi(batch);
 
                /* emit gmem2mem to transfer tile back to system memory: */
@@ -378,6 +508,8 @@ render_tiles(struct fd_batch *batch)
 
        if (ctx->emit_tile_fini)
                ctx->emit_tile_fini(batch);
+
+       mtx_unlock(&ctx->gmem_lock);
 }
 
 static void
@@ -391,7 +523,9 @@ render_sysmem(struct fd_batch *batch)
                ctx->query_prepare_tile(batch, 0, batch->gmem);
 
        /* emit IB to drawcmds: */
-       ctx->emit_ib(batch->gmem, batch->draw);
+       fd_log(batch, "SYSMEM: START DRAW IB");
+       ctx->screen->emit_ib(batch->gmem, batch->draw);
+       fd_log(batch, "SYSMEM: END DRAW IB");
        fd_reset_wfi(batch);
 
        if (ctx->emit_sysmem_fini)
@@ -409,6 +543,7 @@ flush_ring(struct fd_batch *batch)
                        &timestamp);
 
        fd_fence_populate(batch->fence, timestamp, out_fence_fd);
+       fd_log_flush(batch);
 }
 
 void
@@ -422,7 +557,7 @@ fd_gmem_render_tiles(struct fd_batch *batch)
                if (batch->cleared || batch->gmem_reason ||
                                ((batch->num_draws > 5) && !batch->blit) ||
                                (pfb->samples > 1)) {
-                       DBG("GMEM: cleared=%x, gmem_reason=%x, num_draws=%u, samples=%u",
+                       fd_log(batch, "GMEM: cleared=%x, gmem_reason=%x, num_draws=%u, samples=%u",
                                batch->cleared, batch->gmem_reason, batch->num_draws,
                                pfb->samples);
                } else if (!(fd_mesa_debug & FD_DBG_NOBYPASS)) {
@@ -435,15 +570,43 @@ fd_gmem_render_tiles(struct fd_batch *batch)
                }
        }
 
+       if (fd_mesa_debug & FD_DBG_NOGMEM)
+               sysmem = true;
+
+       /* Layered rendering always needs bypass. */
+       for (unsigned i = 0; i < pfb->nr_cbufs; i++) {
+               struct pipe_surface *psurf = pfb->cbufs[i];
+               if (!psurf)
+                       continue;
+               if (psurf->u.tex.first_layer < psurf->u.tex.last_layer)
+                       sysmem = true;
+       }
+
+       /* Tessellation doesn't seem to support tiled rendering so fall back to
+        * bypass.
+        */
+       if (batch->tessellation) {
+               debug_assert(ctx->emit_sysmem_prep);
+               sysmem = true;
+       }
+
        fd_reset_wfi(batch);
 
        ctx->stats.batch_total++;
 
+       if (unlikely(fd_mesa_debug & FD_DBG_LOG) && !batch->nondraw) {
+               fd_log_stream(batch, stream, util_dump_framebuffer_state(stream, pfb));
+               for (unsigned i = 0; i < pfb->nr_cbufs; i++) {
+                       fd_log_stream(batch, stream, util_dump_surface(stream, pfb->cbufs[i]));
+               }
+               fd_log_stream(batch, stream, util_dump_surface(stream, pfb->zsbuf));
+       }
+
        if (batch->nondraw) {
                DBG("%p: rendering non-draw", batch);
                ctx->stats.batch_nondraw++;
        } else if (sysmem) {
-               DBG("%p: rendering sysmem %ux%u (%s/%s), num_draws=%u",
+               fd_log(batch, "%p: rendering sysmem %ux%u (%s/%s), num_draws=%u",
                        batch, pfb->width, pfb->height,
                        util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
                        util_format_short_name(pipe_surface_format(pfb->zsbuf)),
@@ -453,28 +616,52 @@ fd_gmem_render_tiles(struct fd_batch *batch)
                render_sysmem(batch);
                ctx->stats.batch_sysmem++;
        } else {
-               struct fd_gmem_stateobj *gmem = &ctx->gmem;
-               calculate_tiles(batch);
-               DBG("%p: rendering %dx%d tiles %ux%u (%s/%s)",
+               struct fd_gmem_stateobj *gmem = lookup_gmem_state(batch, false, 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,
                        util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
                        util_format_short_name(pipe_surface_format(pfb->zsbuf)));
                if (ctx->query_prepare)
                        ctx->query_prepare(batch, gmem->nbins_x * gmem->nbins_y);
-               render_tiles(batch);
+               render_tiles(batch, gmem);
+               batch->gmem_state = NULL;
+
+               fd_screen_lock(ctx->screen);
+               fd_gmem_reference(&gmem, NULL);
+               fd_screen_unlock(ctx->screen);
+
                ctx->stats.batch_gmem++;
        }
 
        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, true);
+       unsigned nbins = gmem->maxpw * gmem->maxph;
+
+       fd_screen_lock(screen);
+       fd_gmem_reference(&gmem, NULL);
+       fd_screen_unlock(screen);
+
+       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
  * case would be a single clear.
  */
 bool
-fd_gmem_needs_restore(struct fd_batch *batch, struct fd_tile *tile,
+fd_gmem_needs_restore(struct fd_batch *batch, const struct fd_tile *tile,
                uint32_t buffers)
 {
        if (!(batch->restore & buffers))
@@ -482,3 +669,20 @@ fd_gmem_needs_restore(struct fd_batch *batch, struct fd_tile *tile,
 
        return true;
 }
+
+void
+fd_gmem_screen_init(struct pipe_screen *pscreen)
+{
+       struct fd_gmem_cache *cache = &fd_screen(pscreen)->gmem_cache;
+
+       cache->ht = _mesa_hash_table_create(NULL, gmem_key_hash, gmem_key_equals);
+       list_inithead(&cache->lru);
+}
+
+void
+fd_gmem_screen_fini(struct pipe_screen *pscreen)
+{
+       struct fd_gmem_cache *cache = &fd_screen(pscreen)->gmem_cache;
+
+       _mesa_hash_table_destroy(cache->ht, NULL);
+}