--- /dev/null
+/**********************************************************
+ * 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 <jfonseca@vmware.com>
+ */
+
+
+#include "svga_cmd.h"
+
+#include "pipe/p_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;
+}
projects / mesa.git / blobdiff