Import texmem i915 driver to its new location as i915tex.

1 files changed, 418 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915tex/intel_batchpool.c b/src/mesa/drivers/dri/i915tex/intel_batchpool.c
new file mode 100644
index 0000000000..3c17c50204
--- /dev/null
+++ b/src/mesa/drivers/dri/i915tex/intel_batchpool.c
@@ -0,0 +1,418 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * 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 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 COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
+ */
+
+#include <xf86drm.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "imports.h"
+#include "glthread.h"
+#include "dri_bufpool.h"
+#include "dri_bufmgr.h"
+#include "intel_screen.h"
+
+typedef struct
+{
+   drmMMListHead head;
+   struct _BPool *parent;
+   struct _DriFenceObject *fence;
+   unsigned long start;
+   int unfenced;
+   int mapped;
+} BBuf;
+
+typedef struct _BPool
+{
+   _glthread_Mutex mutex;
+   unsigned long bufSize;
+   unsigned poolSize;
+   unsigned numFree;
+   unsigned numTot;
+   unsigned numDelayed;
+   unsigned checkDelayed;
+   drmMMListHead free;
+   drmMMListHead delayed;
+   drmMMListHead head;
+   drmBO kernelBO;
+   void *virtual;
+   BBuf *bufs;
+} BPool;
+
+
+static BPool *
+createBPool(int fd, unsigned long bufSize, unsigned numBufs, unsigned flags,
+            unsigned checkDelayed)
+{
+   BPool *p = (BPool *) malloc(sizeof(*p));
+   BBuf *buf;
+   int i;
+
+   if (!p)
+      return NULL;
+
+   p->bufs = (BBuf *) malloc(numBufs * sizeof(*p->bufs));
+   if (!p->bufs) {
+      free(p);
+      return NULL;
+   }
+
+   DRMINITLISTHEAD(&p->free);
+   DRMINITLISTHEAD(&p->head);
+   DRMINITLISTHEAD(&p->delayed);
+
+   p->numTot = numBufs;
+   p->numFree = numBufs;
+   p->bufSize = bufSize;
+   p->numDelayed = 0;
+   p->checkDelayed = checkDelayed;
+
+   _glthread_INIT_MUTEX(p->mutex);
+
+   if (drmBOCreate(fd, 0, numBufs * bufSize, 0, NULL, drm_bo_type_dc,
+                   flags, 0, &p->kernelBO)) {
+      free(p->bufs);
+      free(p);
+      return NULL;
+   }
+   if (drmBOMap(fd, &p->kernelBO, DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0,
+                &p->virtual)) {
+      drmBODestroy(fd, &p->kernelBO);
+      free(p->bufs);
+      free(p);
+      return NULL;
+   }
+
+   /*
+    * We unmap the buffer so that we can validate it later. Note that this is
+    * just a synchronizing operation. The buffer will have a virtual mapping
+    * until it is destroyed.
+    */
+
+   drmBOUnmap(fd, &p->kernelBO);
+
+   buf = p->bufs;
+   for (i = 0; i < numBufs; ++i) {
+      buf->parent = p;
+      buf->fence = NULL;
+      buf->start = i * bufSize;
+      buf->mapped = 0;
+      buf->unfenced = 0;
+      DRMLISTADDTAIL(&buf->head, &p->free);
+      buf++;
+   }
+
+   return p;
+}
+
+
+static void
+pool_checkFree(BPool * p, int wait)
+{
+   drmMMListHead *list, *prev;
+   BBuf *buf;
+   int signaled = 0;
+   int i;
+
+   list = p->delayed.next;
+
+   if (p->numDelayed > 3) {
+      for (i = 0; i < p->numDelayed; i += 3) {
+         list = list->next;
+      }
+   }
+
+   prev = list->prev;
+   for (; list != &p->delayed; list = prev, prev = list->prev) {
+
+      buf = DRMLISTENTRY(BBuf, list, head);
+
+      if (!signaled) {
+         if (wait) {
+            driFenceFinish(buf->fence, DRM_FENCE_TYPE_EXE, 1);
+            signaled = 1;
+         }
+         else {
+            signaled = driFenceSignaled(buf->fence, DRM_FENCE_TYPE_EXE);
+         }
+      }
+
+      if (!signaled)
+         break;
+
+      driFenceUnReference(buf->fence);
+      buf->fence = NULL;
+      DRMLISTDEL(list);
+      p->numDelayed--;
+      DRMLISTADD(list, &p->free);
+      p->numFree++;
+   }
+}
+
+static void *
+pool_create(struct _DriBufferPool *pool,
+            unsigned long size, unsigned flags, unsigned hint,
+            unsigned alignment)
+{
+   BPool *p = (BPool *) pool->data;
+
+   drmMMListHead *item;
+
+   if (alignment && (alignment != 4096))
+      return NULL;
+
+   _glthread_LOCK_MUTEX(p->mutex);
+
+   if (p->numFree == 0)
+      pool_checkFree(p, GL_TRUE);
+
+   if (p->numFree == 0) {
+      fprintf(stderr, "Out of fixed size buffer objects\n");
+      BM_CKFATAL(-ENOMEM);
+   }
+
+   item = p->free.next;
+
+   if (item == &p->free) {
+      fprintf(stderr, "Fixed size buffer pool corruption\n");
+   }
+
+   DRMLISTDEL(item);
+   --p->numFree;
+
+   _glthread_UNLOCK_MUTEX(p->mutex);
+   return (void *) DRMLISTENTRY(BBuf, item, head);
+}
+
+
+static int
+pool_destroy(struct _DriBufferPool *pool, void *private)
+{
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+
+   _glthread_LOCK_MUTEX(p->mutex);
+
+   if (buf->fence) {
+      DRMLISTADDTAIL(&buf->head, &p->delayed);
+      p->numDelayed++;
+   }
+   else {
+      buf->unfenced = 0;
+      DRMLISTADD(&buf->head, &p->free);
+      p->numFree++;
+   }
+
+   if ((p->numDelayed % p->checkDelayed) == 0)
+      pool_checkFree(p, 0);
+
+   _glthread_UNLOCK_MUTEX(p->mutex);
+   return 0;
+}
+
+
+static int
+pool_map(struct _DriBufferPool *pool, void *private, unsigned flags,
+         int hint, void **virtual)
+{
+
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+
+   _glthread_LOCK_MUTEX(p->mutex);
+
+   /*
+    * Currently Mesa doesn't have any condition variables to resolve this
+    * cleanly in a multithreading environment.
+    * We bail out instead.
+    */
+
+   if (buf->mapped) {
+      fprintf(stderr, "Trying to map already mapped buffer object\n");
+      BM_CKFATAL(-EINVAL);
+   }
+
+#if 0
+   if (buf->unfenced && !(hint & DRM_BO_HINT_ALLOW_UNFENCED_MAP)) {
+      fprintf(stderr, "Trying to map an unfenced buffer object 0x%08x"
+              " 0x%08x %d\n", hint, flags, buf->start);
+      BM_CKFATAL(-EINVAL);
+   }
+
+#endif
+
+   if (buf->fence) {
+      _glthread_UNLOCK_MUTEX(p->mutex);
+      return -EBUSY;
+   }
+
+   buf->mapped = GL_TRUE;
+   *virtual = (unsigned char *) p->virtual + buf->start;
+   _glthread_UNLOCK_MUTEX(p->mutex);
+   return 0;
+}
+
+static int
+pool_waitIdle(struct _DriBufferPool *pool, void *private, int lazy)
+{
+   BBuf *buf = (BBuf *) private;
+   driFenceFinish(buf->fence, 0, lazy);
+   return 0;
+}
+
+static int
+pool_unmap(struct _DriBufferPool *pool, void *private)
+{
+   BBuf *buf = (BBuf *) private;
+
+   buf->mapped = 0;
+   return 0;
+}
+
+static unsigned long
+pool_offset(struct _DriBufferPool *pool, void *private)
+{
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+
+   return p->kernelBO.offset + buf->start;
+}
+
+static unsigned
+pool_flags(struct _DriBufferPool *pool, void *private)
+{
+   BPool *p = (BPool *) pool->data;
+
+   return p->kernelBO.flags;
+}
+
+static unsigned long
+pool_size(struct _DriBufferPool *pool, void *private)
+{
+   BPool *p = (BPool *) pool->data;
+
+   return p->bufSize;
+}
+
+
+static int
+pool_fence(struct _DriBufferPool *pool, void *private,
+           struct _DriFenceObject *fence)
+{
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+
+   _glthread_LOCK_MUTEX(p->mutex);
+   if (buf->fence) {
+      driFenceUnReference(buf->fence);
+   }
+   buf->fence = fence;
+   buf->unfenced = 0;
+   driFenceReference(buf->fence);
+   _glthread_UNLOCK_MUTEX(p->mutex);
+
+   return 0;
+}
+
+static drmBO *
+pool_kernel(struct _DriBufferPool *pool, void *private)
+{
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+
+   return &p->kernelBO;
+}
+
+static int
+pool_validate(struct _DriBufferPool *pool, void *private)
+{
+   BBuf *buf = (BBuf *) private;
+   BPool *p = buf->parent;
+   _glthread_LOCK_MUTEX(p->mutex);
+   buf->unfenced = GL_TRUE;
+   _glthread_UNLOCK_MUTEX(p->mutex);
+   return 0;
+}
+
+static void
+pool_takedown(struct _DriBufferPool *pool)
+{
+   BPool *p = (BPool *) pool->data;
+
+   /*
+    * Wait on outstanding fences. 
+    */
+
+   _glthread_LOCK_MUTEX(p->mutex);
+   while ((p->numFree < p->numTot) && p->numDelayed) {
+      _glthread_UNLOCK_MUTEX(p->mutex);
+      sched_yield();
+      pool_checkFree(p, GL_TRUE);
+      _glthread_LOCK_MUTEX(p->mutex);
+   }
+
+   drmBODestroy(pool->fd, &p->kernelBO);
+   free(p->bufs);
+   _glthread_UNLOCK_MUTEX(p->mutex);
+   free(p);
+   free(pool);
+}
+
+
+struct _DriBufferPool *
+driBatchPoolInit(int fd, unsigned flags,
+                 unsigned long bufSize,
+                 unsigned numBufs, unsigned checkDelayed)
+{
+   struct _DriBufferPool *pool;
+
+   pool = (struct _DriBufferPool *) malloc(sizeof(*pool));
+   if (!pool)
+      return NULL;
+
+   pool->data = createBPool(fd, bufSize, numBufs, flags, checkDelayed);
+   if (!pool->data)
+      return NULL;
+
+   pool->fd = fd;
+   pool->map = &pool_map;
+   pool->unmap = &pool_unmap;
+   pool->destroy = &pool_destroy;
+   pool->offset = &pool_offset;
+   pool->flags = &pool_flags;
+   pool->size = &pool_size;
+   pool->create = &pool_create;
+   pool->fence = &pool_fence;
+   pool->kernel = &pool_kernel;
+   pool->validate = &pool_validate;
+   pool->waitIdle = &pool_waitIdle;
+   pool->setstatic = NULL;
+   pool->takeDown = &pool_takedown;
+   return pool;
+}