iris/bufmgr: Add support for MMAP_OFFSET ioctl.

[mesa.git] / src / gallium / drivers / iris / iris_border_color.c

diff --git a/src/gallium/drivers/iris/iris_border_color.c b/src/gallium/drivers/iris/iris_border_color.c
index 03a698a9c6e2674f2536d8544a328587a43685eb..ebed3e4445d449d51d1132772734e977dd6873a3 100644 (file)
--- a/src/gallium/drivers/iris/iris_border_color.c
+++ b/src/gallium/drivers/iris/iris_border_color.c
@@ -4,21 +4,42 @@
  * 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
- * on the rights to use, copy, modify, merge, publish, distribute, sub
- * license, 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 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 above copyright notice and this permission notice 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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.
+ * 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.
+ */
+
+/**
+ * @file iris_border_color.c
+ *
+ * Each SAMPLER_STATE points to a SAMPLER_BORDER_COLOR_STATE entry,
+ * describing the color to return when sampling outside the texture
+ * when using CLAMP_TO_BORDER wrap modes.
+ *
+ * These must be stored relative to Dynamic State Base Address.
+ * Unfortunately, the hardware designers only gave us a 24-bit pointer
+ * rather than an actual graphics address, so it must be stored in the
+ * bottom 16MB of that memory zone.  This means we can't simply use
+ * u_upload_mgr like we do for most state.
+ *
+ * To work around this, we maintain a single "border color pool" BO
+ * which we pin at the base of IRIS_MEMZONE_DYNAMIC.  Since most border
+ * colors are the same (typically black or white), we maintain a hash
+ * table of known colors, and reuse the same entries.  This avoids
+ * wasting a lot of space in the pool.
+ *
+ * If it ever does fill up, we simply flush.
  */
 
 #include <stdlib.h>
@@ -72,6 +93,14 @@ iris_init_border_color_pool(struct iris_context *ice)
    iris_reset_border_color_pool(pool, bufmgr);
 }
 
+void
+iris_destroy_border_color_pool(struct iris_context *ice)
+{
+   struct iris_border_color_pool *pool = &ice->state.border_color_pool;
+   iris_bo_unreference(pool->bo);
+   ralloc_free(pool->ht);
+}
+
 /**
  * Reserve space for a number of border colors.  If no space, flushes any
  * batches that are referring to the old BO and makes a new one.
@@ -84,8 +113,11 @@ iris_border_color_pool_reserve(struct iris_context *ice, unsigned count)
       (IRIS_BORDER_COLOR_POOL_SIZE - pool->insert_point) / BC_ALIGNMENT;
 
    if (remaining_entries < count) {
-      if (iris_batch_references(&ice->render_batch, pool->bo))
-         iris_batch_flush(&ice->render_batch);
+      /* It's safe to flush because we're called outside of state upload. */
+      for (int i = 0; i < IRIS_BATCH_COUNT; i++) {
+         if (iris_batch_references(&ice->batches[i], pool->bo))
+            iris_batch_flush(&ice->batches[i]);
+      }
 
       iris_reset_border_color_pool(pool, pool->bo->bufmgr);
    }
@@ -94,7 +126,8 @@ iris_border_color_pool_reserve(struct iris_context *ice, unsigned count)
 /**
  * Upload a border color (or use a cached version).
  *
- * Returns the offset into the border color pool BO.
+ * Returns the offset into the border color pool BO.  Note that you must
+ * reserve space ahead of time by calling iris_border_color_pool_reserve().
  */
 uint32_t
 iris_upload_border_color(struct iris_context *ice,