--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2006 VMware, Inc.
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+/* Provide additional functionality on top of bufmgr buffers:
+ * - 2d semantics and blit operations
+ * - refcounting of buffers for multiple images in a buffer.
+ * - refcounting of buffer mappings.
+ * - some logic for moving the buffers to the best memory pools for
+ * given operations.
+ *
+ * Most of this is to make it easier to implement the fixed-layout
+ * mipmap tree required by intel hardware in the face of GL's
+ * programming interface where each image can be specifed in random
+ * order and it isn't clear what layout the tree should have until the
+ * last moment.
+ */
+
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "main/hash.h"
+#include "brw_context.h"
+#include "intel_regions.h"
+#include "intel_blit.h"
+#include "intel_buffer_objects.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+
+#define FILE_DEBUG_FLAG DEBUG_REGION
+
+/* This should be set to the maximum backtrace size desired.
+ * Set it to 0 to disable backtrace debugging.
+ */
+#define DEBUG_BACKTRACE_SIZE 0
+
+#if DEBUG_BACKTRACE_SIZE == 0
+/* Use the standard debug output */
+#define _DBG(...) DBG(__VA_ARGS__)
+#else
+/* Use backtracing debug output */
+#define _DBG(...) {debug_backtrace(); DBG(__VA_ARGS__);}
+
+/* Backtracing debug support */
+#include <execinfo.h>
+
+static void
+debug_backtrace(void)
+{
+ void *trace[DEBUG_BACKTRACE_SIZE];
+ char **strings = NULL;
+ int traceSize;
+ register int i;
+
+ traceSize = backtrace(trace, DEBUG_BACKTRACE_SIZE);
+ strings = backtrace_symbols(trace, traceSize);
+ if (strings == NULL) {
+ DBG("no backtrace:");
+ return;
+ }
+
+ /* Spit out all the strings with a colon separator. Ignore
+ * the first, since we don't really care about the call
+ * to debug_backtrace() itself. Skip until the final "/" in
+ * the trace to avoid really long lines.
+ */
+ for (i = 1; i < traceSize; i++) {
+ char *p = strings[i], *slash = strings[i];
+ while (*p) {
+ if (*p++ == '/') {
+ slash = p;
+ }
+ }
+
+ DBG("%s:", slash);
+ }
+
+ /* Free up the memory, and we're done */
+ free(strings);
+}
+
+#endif
+
+static struct intel_region *
+intel_region_alloc_internal(struct intel_screen *screen,
+ GLuint cpp,
+ GLuint width, GLuint height, GLuint pitch,
+ uint32_t tiling, drm_intel_bo *buffer)
+{
+ struct intel_region *region;
+
+ region = calloc(sizeof(*region), 1);
+ if (region == NULL)
+ return region;
+
+ region->cpp = cpp;
+ region->width = width;
+ region->height = height;
+ region->pitch = pitch;
+ region->refcount = 1;
+ region->bo = buffer;
+ region->tiling = tiling;
+
+ _DBG("%s <-- %p\n", __FUNCTION__, region);
+ return region;
+}
+
+struct intel_region *
+intel_region_alloc(struct intel_screen *screen,
+ uint32_t tiling,
+ GLuint cpp, GLuint width, GLuint height,
+ bool expect_accelerated_upload)
+{
+ drm_intel_bo *buffer;
+ unsigned long flags = 0;
+ unsigned long aligned_pitch;
+ struct intel_region *region;
+
+ if (expect_accelerated_upload)
+ flags |= BO_ALLOC_FOR_RENDER;
+
+ buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "region",
+ width, height, cpp,
+ &tiling, &aligned_pitch, flags);
+ if (buffer == NULL)
+ return NULL;
+
+ region = intel_region_alloc_internal(screen, cpp, width, height,
+ aligned_pitch, tiling, buffer);
+ if (region == NULL) {
+ drm_intel_bo_unreference(buffer);
+ return NULL;
+ }
+
+ return region;
+}
+
+void
+intel_region_reference(struct intel_region **dst, struct intel_region *src)
+{
+ _DBG("%s: %p(%d) -> %p(%d)\n", __FUNCTION__,
+ *dst, *dst ? (*dst)->refcount : 0, src, src ? src->refcount : 0);
+
+ if (src != *dst) {
+ if (*dst)
+ intel_region_release(dst);
+
+ if (src)
+ src->refcount++;
+ *dst = src;
+ }
+}
+
+void
+intel_region_release(struct intel_region **region_handle)
+{
+ struct intel_region *region = *region_handle;
+
+ if (region == NULL) {
+ _DBG("%s NULL\n", __FUNCTION__);
+ return;
+ }
+
+ _DBG("%s %p %d\n", __FUNCTION__, region, region->refcount - 1);
+
+ ASSERT(region->refcount > 0);
+ region->refcount--;
+
+ if (region->refcount == 0) {
+ drm_intel_bo_unreference(region->bo);
+
+ free(region);
+ }
+ *region_handle = NULL;
+}
projects / mesa.git / blobdiff