1 files changed, 274 insertions, 0 deletions
diff --git a/src/gallium/winsys/svga/drm/vmw_buffer.c b/src/gallium/winsys/svga/drm/vmw_buffer.c
new file mode 100644
index 00000000000..eca174a6c56
--- /dev/null
+++ b/src/gallium/winsys/svga/drm/vmw_buffer.c
@@ -0,0 +1,274 @@
+/**********************************************************
+ * Copyright 2009 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, 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 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.
+ *
+ **********************************************************/
+
+/**
+ * @file
+ * SVGA buffer manager for Guest Memory Regions (GMRs).
+ * 
+ * GMRs are used for pixel and vertex data upload/download to/from the virtual
+ * SVGA hardware. There is a limited number of GMRs available, and 
+ * creating/destroying them is also a slow operation so we must suballocate 
+ * them.
+ * 
+ * This file implements a pipebuffer library's buffer manager, so that we can
+ * use pipepbuffer's suballocation, fencing, and debugging facilities with GMRs. 
+ * 
+ * @author Jose Fonseca <[email protected]>
+ */
+
+
+#include "svga_cmd.h"
+
+#include "util/u_inlines.h"
+#include "util/u_memory.h"
+#include "pipebuffer/pb_buffer.h"
+#include "pipebuffer/pb_bufmgr.h"
+
+#include "svga_winsys.h"
+
+#include "vmw_screen.h"
+#include "vmw_buffer.h"
+
+
+struct vmw_gmr_bufmgr;
+
+
+struct vmw_gmr_buffer
+{
+   struct pb_buffer base;
+   
+   struct vmw_gmr_bufmgr *mgr;
+   
+   struct vmw_region *region;
+   void *map;
+   
+#ifdef DEBUG
+   struct pipe_fence_handle *last_fence;
+#endif
+};
+
+
+extern const struct pb_vtbl vmw_gmr_buffer_vtbl;
+
+
+static INLINE struct vmw_gmr_buffer *
+vmw_gmr_buffer(struct pb_buffer *buf)
+{
+   assert(buf);
+   assert(buf->vtbl == &vmw_gmr_buffer_vtbl);
+   return (struct vmw_gmr_buffer *)buf;
+}
+
+
+struct vmw_gmr_bufmgr
+{
+   struct pb_manager base;
+   
+   struct vmw_winsys_screen *vws;
+};
+
+
+static INLINE struct vmw_gmr_bufmgr *
+vmw_gmr_bufmgr(struct pb_manager *mgr)
+{
+   assert(mgr);
+   return (struct vmw_gmr_bufmgr *)mgr;
+}
+
+
+static void
+vmw_gmr_buffer_destroy(struct pb_buffer *_buf)
+{
+   struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
+
+#ifdef DEBUG
+   if(buf->last_fence) {
+      struct svga_winsys_screen *sws = &buf->mgr->vws->base;
+      assert(sws->fence_signalled(sws, buf->last_fence, 0) == 0);
+   }
+#endif
+
+   vmw_ioctl_region_unmap(buf->region);
+   
+   vmw_ioctl_region_destroy(buf->region);
+
+   FREE(buf);
+}
+
+
+static void *
+vmw_gmr_buffer_map(struct pb_buffer *_buf,
+               unsigned flags)
+{
+   struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
+   return buf->map;
+}
+
+
+static void
+vmw_gmr_buffer_unmap(struct pb_buffer *_buf)
+{
+   /* Do nothing */
+   (void)_buf;
+}
+
+
+static void
+vmw_gmr_buffer_get_base_buffer(struct pb_buffer *buf,
+                           struct pb_buffer **base_buf,
+                           unsigned *offset)
+{
+   *base_buf = buf;
+   *offset = 0;
+}
+
+
+static enum pipe_error
+vmw_gmr_buffer_validate( struct pb_buffer *_buf, 
+                         struct pb_validate *vl,
+                         unsigned flags )
+{
+   /* Always pinned */
+   return PIPE_OK;
+}
+
+
+static void
+vmw_gmr_buffer_fence( struct pb_buffer *_buf, 
+                      struct pipe_fence_handle *fence )
+{
+   /* We don't need to do anything, as the pipebuffer library
+    * will take care of delaying the destruction of fenced buffers */  
+#ifdef DEBUG
+   struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
+   if(fence)
+      buf->last_fence = fence;
+#endif
+}
+
+
+const struct pb_vtbl vmw_gmr_buffer_vtbl = {
+   vmw_gmr_buffer_destroy,
+   vmw_gmr_buffer_map,
+   vmw_gmr_buffer_unmap,
+   vmw_gmr_buffer_validate,
+   vmw_gmr_buffer_fence,
+   vmw_gmr_buffer_get_base_buffer
+};
+
+
+static struct pb_buffer *
+vmw_gmr_bufmgr_create_buffer(struct pb_manager *_mgr,
+                         pb_size size,
+                         const struct pb_desc *desc) 
+{
+   struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
+   struct vmw_winsys_screen *vws = mgr->vws;
+   struct vmw_gmr_buffer *buf;
+   
+   buf = CALLOC_STRUCT(vmw_gmr_buffer);
+   if(!buf)
+      goto error1;
+
+   pipe_reference_init(&buf->base.base.reference, 1);
+   buf->base.base.alignment = desc->alignment;
+   buf->base.base.usage = desc->usage;
+   buf->base.base.size = size;
+   buf->base.vtbl = &vmw_gmr_buffer_vtbl;
+   buf->mgr = mgr;
+
+   buf->region = vmw_ioctl_region_create(vws, size);
+   if(!buf->region)
+      goto error2;
+	 
+   buf->map = vmw_ioctl_region_map(buf->region);
+   if(!buf->map)
+      goto error3;
+
+   return &buf->base;
+
+error3:
+   vmw_ioctl_region_destroy(buf->region);
+error2:
+   FREE(buf);
+error1:
+   return NULL;
+}
+
+
+static void
+vmw_gmr_bufmgr_flush(struct pb_manager *mgr) 
+{
+   /* No-op */
+}
+
+
+static void
+vmw_gmr_bufmgr_destroy(struct pb_manager *_mgr) 
+{
+   struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
+   FREE(mgr);
+}
+
+
+struct pb_manager *
+vmw_gmr_bufmgr_create(struct vmw_winsys_screen *vws) 
+{
+   struct vmw_gmr_bufmgr *mgr;
+   
+   mgr = CALLOC_STRUCT(vmw_gmr_bufmgr);
+   if(!mgr)
+      return NULL;
+
+   mgr->base.destroy = vmw_gmr_bufmgr_destroy;
+   mgr->base.create_buffer = vmw_gmr_bufmgr_create_buffer;
+   mgr->base.flush = vmw_gmr_bufmgr_flush;
+   
+   mgr->vws = vws;
+   
+   return &mgr->base;
+}
+
+
+boolean
+vmw_gmr_bufmgr_region_ptr(struct pb_buffer *buf, 
+                          struct SVGAGuestPtr *ptr)
+{
+   struct pb_buffer *base_buf;
+   unsigned offset = 0;
+   struct vmw_gmr_buffer *gmr_buf;
+   
+   pb_get_base_buffer( buf, &base_buf, &offset );
+   
+   gmr_buf = vmw_gmr_buffer(base_buf);
+   if(!gmr_buf)
+      return FALSE;
+   
+   *ptr = vmw_ioctl_region_ptr(gmr_buf->region);
+   
+   ptr->offset += offset;
+   
+   return TRUE;
+}