Revert "WIP 965 conversion to dri_bufmgr."

This reverts commit b2f1aa2389473ed09170713301b042661d70a48e.

Somehow I ended up with my branch's save-this-while-I-work-on-master commit
actually on master.

1 files changed, 331 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_batchbuffer.c b/src/mesa/drivers/dri/i915/intel_batchbuffer.c
new file mode 100644
index 0000000000..8ee48b5a68
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/intel_batchbuffer.c
@@ -0,0 +1,331 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * 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, 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 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS 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.
+ * 
+ **************************************************************************/
+
+#include "intel_batchbuffer.h"
+#include "intel_ioctl.h"
+#include "intel_decode.h"
+#include "i915_debug.h"
+
+/* Relocations in kernel space:
+ *    - pass dma buffer seperately
+ *    - memory manager knows how to patch
+ *    - pass list of dependent buffers
+ *    - pass relocation list
+ *
+ * Either:
+ *    - get back an offset for buffer to fire
+ *    - memory manager knows how to fire buffer
+ *
+ * Really want the buffer to be AGP and pinned.
+ *
+ */
+
+/* Cliprect fence: The highest fence protecting a dma buffer
+ * containing explicit cliprect information.  Like the old drawable
+ * lock but irq-driven.  X server must wait for this fence to expire
+ * before changing cliprects [and then doing sw rendering?].  For
+ * other dma buffers, the scheduler will grab current cliprect info
+ * and mix into buffer.  X server must hold the lock while changing
+ * cliprects???  Make per-drawable.  Need cliprects in shared memory
+ * -- beats storing them with every cmd buffer in the queue.
+ *
+ * ==> X server must wait for this fence to expire before touching the
+ * framebuffer with new cliprects.
+ *
+ * ==> Cliprect-dependent buffers associated with a
+ * cliprect-timestamp.  All of the buffers associated with a timestamp
+ * must go to hardware before any buffer with a newer timestamp.
+ *
+ * ==> Dma should be queued per-drawable for correct X/GL
+ * synchronization.  Or can fences be used for this?
+ *
+ * Applies to: Blit operations, metaops, X server operations -- X
+ * server automatically waits on its own dma to complete before
+ * modifying cliprects ???
+ */
+
+void
+intel_batchbuffer_reset(struct intel_batchbuffer *batch)
+{
+   struct intel_context *intel = batch->intel;
+
+   if (batch->buf != NULL) {
+      dri_bo_unreference(batch->buf);
+      batch->buf = NULL;
+   }
+
+   batch->buf = dri_bo_alloc(intel->intelScreen->bufmgr, "batchbuffer",
+			     intel->intelScreen->maxBatchSize, 4096,
+			     DRM_BO_FLAG_MEM_TT);
+   dri_bo_map(batch->buf, GL_TRUE);
+   batch->map = batch->buf->virtual;
+   batch->size = intel->intelScreen->maxBatchSize;
+   batch->ptr = batch->map;
+}
+
+struct intel_batchbuffer *
+intel_batchbuffer_alloc(struct intel_context *intel)
+{
+   struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1);
+
+   batch->intel = intel;
+   batch->last_fence = NULL;
+   intel_batchbuffer_reset(batch);
+
+   return batch;
+}
+
+void
+intel_batchbuffer_free(struct intel_batchbuffer *batch)
+{
+   if (batch->last_fence) {
+      dri_fence_wait(batch->last_fence);
+      dri_fence_unreference(batch->last_fence);
+      batch->last_fence = NULL;
+   }
+   if (batch->map) {
+      dri_bo_unmap(batch->buf);
+      batch->map = NULL;
+   }
+   dri_bo_unreference(batch->buf);
+   batch->buf = NULL;
+   free(batch);
+}
+
+static int
+relocation_sort(const void *a_in, const void *b_in) {
+   const struct buffer_reloc *a = a_in, *b = b_in;
+
+   return (intptr_t)a->buf < (intptr_t)b->buf ? -1 : 1;
+}
+
+
+/* TODO: Push this whole function into bufmgr.
+ */
+static void
+do_flush_locked(struct intel_batchbuffer *batch,
+                GLuint used,
+                GLboolean ignore_cliprects, GLboolean allow_unlock)
+{
+   GLuint *ptr;
+   GLuint i;
+   struct intel_context *intel = batch->intel;
+   dri_fence *fo;
+   GLboolean performed_rendering = GL_FALSE;
+
+   assert(batch->buf->virtual != NULL);
+   ptr = batch->buf->virtual;
+
+   /* Sort our relocation list in terms of referenced buffer pointer.
+    * This lets us uniquely validate the buffers with the sum of all the flags,
+    * while avoiding O(n^2) on number of relocations.
+    */
+   qsort(batch->reloc, batch->nr_relocs, sizeof(batch->reloc[0]),
+	 relocation_sort);
+
+   /* Perform the necessary validations of buffers, and enter the relocations
+    * in the batchbuffer.
+    */
+   for (i = 0; i < batch->nr_relocs; i++) {
+      struct buffer_reloc *r = &batch->reloc[i];
+
+      if (r->validate_flags & DRM_BO_FLAG_WRITE)
+	 performed_rendering = GL_TRUE;
+
+      /* If this is the first time we've seen this buffer in the relocation
+       * list, figure out our flags and validate it.
+       */
+      if (i == 0 || batch->reloc[i - 1].buf != r->buf) {
+	 uint32_t validate_flags;
+	 int j, ret;
+
+	 /* Accumulate the flags we need for validating this buffer. */
+	 validate_flags = r->validate_flags;
+	 for (j = i + 1; j < batch->nr_relocs; j++) {
+	    if (batch->reloc[j].buf != r->buf)
+	       break;
+	    validate_flags |= batch->reloc[j].validate_flags;
+	 }
+
+	 /* Validate.  If we fail, fence to clear the unfenced list and bail
+	  * out.
+	  */
+	 ret = dri_bo_validate(r->buf, validate_flags);
+	 if (ret != 0) {
+	    dri_bo_unmap(batch->buf);
+	    fo = dri_fence_validated(intel->intelScreen->bufmgr,
+				     "batchbuffer failure fence", GL_TRUE);
+	    dri_fence_unreference(fo);
+	    goto done;
+	 }
+      }
+      ptr[r->offset / 4] = r->buf->offset + r->delta;
+      dri_bo_unreference(r->buf);
+   }
+
+   dri_bo_unmap(batch->buf);
+   batch->map = NULL;
+   batch->ptr = NULL;
+
+   dri_bo_validate(batch->buf, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_EXE);
+
+   batch->list_count = 0;
+   batch->nr_relocs = 0;
+   batch->flags = 0;
+
+   /* Throw away non-effective packets.  Won't work once we have
+    * hardware contexts which would preserve statechanges beyond a
+    * single buffer.
+    */
+
+   if (!(intel->numClipRects == 0 && !ignore_cliprects)) {
+      intel_batch_ioctl(batch->intel,
+                        batch->buf->offset,
+                        used, ignore_cliprects, allow_unlock);
+   }
+
+   /* Associate a fence with the validated buffers, and note that we included
+    * a flush at the end.
+    */
+   fo = dri_fence_validated(intel->intelScreen->bufmgr,
+			    "Batch fence", GL_TRUE);
+
+   if (performed_rendering) {
+      dri_fence_unreference(batch->last_fence);
+      batch->last_fence = fo;
+   } else {
+     /* If we didn't validate any buffers for writing by the card, we don't
+      * need to track the fence for glFinish().
+      */
+      dri_fence_unreference(fo);
+   }
+
+   if (intel->numClipRects == 0 && !ignore_cliprects) {
+      if (allow_unlock) {
+	 /* If we are not doing any actual user-visible rendering,
+	  * do a sched_yield to keep the app from pegging the cpu while
+	  * achieving nothing.
+	  */
+         UNLOCK_HARDWARE(intel);
+         sched_yield();
+         LOCK_HARDWARE(intel);
+      }
+      intel->vtbl.lost_hardware(intel);
+   }
+
+done:
+   if (INTEL_DEBUG & DEBUG_BATCH) {
+      dri_bo_map(batch->buf, GL_FALSE);
+      intel_decode(ptr, used / 4, batch->buf->offset);
+      dri_bo_unmap(batch->buf);
+   }
+}
+
+
+void
+intel_batchbuffer_flush(struct intel_batchbuffer *batch)
+{
+   struct intel_context *intel = batch->intel;
+   GLuint used = batch->ptr - batch->map;
+   GLboolean was_locked = intel->locked;
+
+   if (used == 0)
+      return;
+
+   /* Add the MI_BATCH_BUFFER_END.  Always add an MI_FLUSH - this is a
+    * performance drain that we would like to avoid.
+    */
+   if (used & 4) {
+      ((int *) batch->ptr)[0] = intel->vtbl.flush_cmd();
+      ((int *) batch->ptr)[1] = 0;
+      ((int *) batch->ptr)[2] = MI_BATCH_BUFFER_END;
+      used += 12;
+   }
+   else {
+      ((int *) batch->ptr)[0] = intel->vtbl.flush_cmd();
+      ((int *) batch->ptr)[1] = MI_BATCH_BUFFER_END;
+      used += 8;
+   }
+
+   /* TODO: Just pass the relocation list and dma buffer up to the
+    * kernel.
+    */
+   if (!was_locked)
+      LOCK_HARDWARE(intel);
+
+   do_flush_locked(batch, used, !(batch->flags & INTEL_BATCH_CLIPRECTS),
+		   GL_FALSE);
+
+   if (!was_locked)
+      UNLOCK_HARDWARE(intel);
+
+   /* Reset the buffer:
+    */
+   intel_batchbuffer_reset(batch);
+}
+
+void
+intel_batchbuffer_finish(struct intel_batchbuffer *batch)
+{
+   intel_batchbuffer_flush(batch);
+   if (batch->last_fence != NULL)
+      dri_fence_wait(batch->last_fence);
+}
+
+
+/*  This is the only way buffers get added to the validate list.
+ */
+GLboolean
+intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
+                             dri_bo *buffer,
+                             GLuint flags, GLuint delta)
+{
+   struct buffer_reloc *r = &batch->reloc[batch->nr_relocs++];
+
+   assert(batch->nr_relocs <= MAX_RELOCS);
+
+   dri_bo_reference(buffer);
+   r->buf = buffer;
+   r->offset = batch->ptr - batch->map;
+   r->delta = delta;
+   r->validate_flags = flags;
+
+   batch->ptr += 4;
+   return GL_TRUE;
+}
+
+
+
+void
+intel_batchbuffer_data(struct intel_batchbuffer *batch,
+                       const void *data, GLuint bytes, GLuint flags)
+{
+   assert((bytes & 3) == 0);
+   intel_batchbuffer_require_space(batch, bytes, flags);
+   __memcpy(batch->ptr, data, bytes);
+   batch->ptr += bytes;
+}