panfrost: Create a blitter library to replace the existing preload helpers

pan_blitter.c is meant to replace the pan_blit.c which currently
provides helpers to preload the tile buffer. Some changes
are worth mentioning:

- we use pre-frame DCDs on Bifrost (Midgard still uses a tiler job
  to preload the tile buffer)
- the blit shaders are now stored in a hash table and created lazily
- we now cache blend shader binaries and blit RSDs too

This library will soon be extended to cover regular blits.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10033>

src/panfrost/Makefile.sources

@@ -36,6 +36,8 @@ lib_FILES := \
         lib/pan_blend.c \
         lib/pan_blend.h \
         lib/pan_blit.c \
+        lib/pan_blitter.c \
+        lib/pan_blitter.h \
         lib/pan_device.h \
         lib/pan_encoder.h \
         lib/pan_format.c \

src/panfrost/lib/meson.build

@@ -27,6 +27,7 @@ libpanfrost_lib_files = files(
   'pan_bo.c',
   'pan_blend.c',
   'pan_blit.c',
+  'pan_blitter.c',
   'pan_cs.c',
   'pan_format.c',
   'pan_indirect_draw.c',

src/panfrost/lib/pan_blitter.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2021 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef __PAN_BLITTER_H
+#define __PAN_BLITTER_H
+
+#include "panfrost-job.h"
+#include "pan_util.h"
+
+struct pan_fb_info;
+struct pan_scoreboard;
+struct pan_pool;
+struct panfrost_device;
+
+void
+pan_blitter_init(struct panfrost_device *dev);
+
+void
+pan_blitter_cleanup(struct panfrost_device *dev);
+
+void
+pan_preload_fb(struct pan_pool *desc_pool,
+               struct pan_scoreboard *scoreboard,
+               struct pan_fb_info *fb,
+               mali_ptr tsd, mali_ptr tiler);
+
+#endif

src/panfrost/lib/pan_device.h

@@ -92,6 +92,20 @@ struct pan_blit_shaders {
         struct pan_blit_shader loads[PAN_BLIT_NUM_TARGETS][PAN_BLIT_NUM_TYPES][2];
 };
 
+struct pan_blitter {
+        struct {
+                struct pan_pool pool;
+                struct hash_table *blit;
+                struct hash_table *blend;
+                pthread_mutex_t lock;
+        } shaders;
+        struct {
+                struct pan_pool pool;
+                struct hash_table *rsds;
+                pthread_mutex_t lock;
+        } rsds;
+};
+
 struct pan_blend_shaders {
         struct hash_table *shaders;
         pthread_mutex_t lock;
@@ -200,6 +214,7 @@ struct panfrost_device {
         } bo_cache;
 
         struct pan_blit_shaders blit_shaders;
+        struct pan_blitter blitter;
         struct pan_blend_shaders blend_shaders;
         struct pan_indirect_draw_shaders indirect_draw_shaders;