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Diffstat (limited to 'src/gallium/drivers/svga/svga_resource_buffer.c')
-rw-r--r--src/gallium/drivers/svga/svga_resource_buffer.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_resource_buffer.c b/src/gallium/drivers/svga/svga_resource_buffer.c
new file mode 100644
index 0000000000..cfa7d1015e
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_resource_buffer.c
@@ -0,0 +1,355 @@
+/**********************************************************
+ * Copyright 2008-2009 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.
+ *
+ **********************************************************/
+
+#include "svga_cmd.h"
+
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "os/os_thread.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
+#include "svga_context.h"
+#include "svga_screen.h"
+#include "svga_resource_buffer.h"
+#include "svga_resource_buffer_upload.h"
+#include "svga_winsys.h"
+#include "svga_debug.h"
+
+
+/**
+ * Vertex and index buffers need hardware backing. Constant buffers
+ * do not. No other types of buffers currently supported.
+ */
+static INLINE boolean
+svga_buffer_needs_hw_storage(unsigned usage)
+{
+ return usage & (PIPE_BIND_VERTEX_BUFFER | PIPE_BIND_INDEX_BUFFER);
+}
+
+
+static unsigned int
+svga_buffer_is_referenced( struct pipe_context *pipe,
+ struct pipe_resource *buf,
+ unsigned face, unsigned level)
+{
+ struct svga_screen *ss = svga_screen(pipe->screen);
+ struct svga_buffer *sbuf = svga_buffer(buf);
+
+ /**
+ * XXX: Check this.
+ * The screen may cache buffer writes, but when we map, we map out
+ * of those cached writes, so we don't need to set a
+ * PIPE_REFERENCED_FOR_WRITE flag for cached buffers.
+ */
+
+ if (!sbuf->handle || ss->sws->surface_is_flushed(ss->sws, sbuf->handle))
+ return PIPE_UNREFERENCED;
+
+ /**
+ * sws->surface_is_flushed() does not distinguish between read references
+ * and write references. So assume a reference is both,
+ * however, we make an exception for index- and vertex buffers, to avoid
+ * a flush in st_bufferobj_get_subdata, during display list replay.
+ */
+
+ if (sbuf->b.b.bind & (PIPE_BIND_VERTEX_BUFFER | PIPE_BIND_INDEX_BUFFER))
+ return PIPE_REFERENCED_FOR_READ;
+
+ return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
+}
+
+
+
+
+
+
+static void *
+svga_buffer_map_range( struct pipe_screen *screen,
+ struct pipe_resource *buf,
+ unsigned offset,
+ unsigned length,
+ unsigned usage )
+{
+ struct svga_screen *ss = svga_screen(screen);
+ struct svga_winsys_screen *sws = ss->sws;
+ struct svga_buffer *sbuf = svga_buffer( buf );
+ void *map;
+
+ if (!sbuf->swbuf && !sbuf->hwbuf) {
+ if (svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK) {
+ /*
+ * We can't create a hardware buffer big enough, so create a malloc
+ * buffer instead.
+ */
+ debug_printf("%s: failed to allocate %u KB of DMA, splitting DMA transfers\n",
+ __FUNCTION__,
+ (sbuf->b.b.width0 + 1023)/1024);
+
+ sbuf->swbuf = align_malloc(sbuf->b.b.width0, 16);
+ }
+ }
+
+ if (sbuf->swbuf) {
+ /* User/malloc buffer */
+ map = sbuf->swbuf;
+ }
+ else if (sbuf->hwbuf) {
+ map = sws->buffer_map(sws, sbuf->hwbuf, usage);
+ }
+ else {
+ map = NULL;
+ }
+
+ if(map) {
+ pipe_mutex_lock(ss->swc_mutex);
+
+ ++sbuf->map.count;
+
+ if (usage & PIPE_TRANSFER_WRITE) {
+ assert(sbuf->map.count <= 1);
+ sbuf->map.writing = TRUE;
+ if (usage & PIPE_TRANSFER_FLUSH_EXPLICIT)
+ sbuf->map.flush_explicit = TRUE;
+ }
+
+ pipe_mutex_unlock(ss->swc_mutex);
+ }
+
+ return map;
+}
+
+
+
+static void
+svga_buffer_flush_mapped_range( struct pipe_screen *screen,
+ struct pipe_resource *buf,
+ unsigned offset, unsigned length)
+{
+ struct svga_buffer *sbuf = svga_buffer( buf );
+ struct svga_screen *ss = svga_screen(screen);
+
+ pipe_mutex_lock(ss->swc_mutex);
+ assert(sbuf->map.writing);
+ if(sbuf->map.writing) {
+ assert(sbuf->map.flush_explicit);
+ svga_buffer_add_range(sbuf, offset, offset + length);
+ }
+ pipe_mutex_unlock(ss->swc_mutex);
+}
+
+static void
+svga_buffer_unmap( struct pipe_screen *screen,
+ struct pipe_resource *buf)
+{
+ struct svga_screen *ss = svga_screen(screen);
+ struct svga_winsys_screen *sws = ss->sws;
+ struct svga_buffer *sbuf = svga_buffer( buf );
+
+ pipe_mutex_lock(ss->swc_mutex);
+
+ assert(sbuf->map.count);
+ if(sbuf->map.count)
+ --sbuf->map.count;
+
+ if(sbuf->hwbuf)
+ sws->buffer_unmap(sws, sbuf->hwbuf);
+
+ if(sbuf->map.writing) {
+ if(!sbuf->map.flush_explicit) {
+ /* No mapped range was flushed -- flush the whole buffer */
+ SVGA_DBG(DEBUG_DMA, "flushing the whole buffer\n");
+
+ svga_buffer_add_range(sbuf, 0, sbuf->b.b.width0);
+ }
+
+ sbuf->map.writing = FALSE;
+ sbuf->map.flush_explicit = FALSE;
+ }
+
+ pipe_mutex_unlock(ss->swc_mutex);
+}
+
+
+
+static void
+svga_buffer_destroy( struct pipe_screen *screen,
+ struct pipe_resource *buf )
+{
+ struct svga_screen *ss = svga_screen(screen);
+ struct svga_buffer *sbuf = svga_buffer( buf );
+
+ assert(!p_atomic_read(&buf->reference.count));
+
+ assert(!sbuf->dma.pending);
+
+ if(sbuf->handle)
+ svga_buffer_destroy_host_surface(ss, sbuf);
+
+ if(sbuf->uploaded.buffer)
+ pipe_resource_reference(&sbuf->uploaded.buffer, NULL);
+
+ if(sbuf->hwbuf)
+ svga_buffer_destroy_hw_storage(ss, sbuf);
+
+ if(sbuf->swbuf && !sbuf->user)
+ align_free(sbuf->swbuf);
+
+ FREE(sbuf);
+}
+
+
+/* Keep the original code more or less intact, implement transfers in
+ * terms of the old functions.
+ */
+static void *
+svga_buffer_transfer_map( struct pipe_context *pipe,
+ struct pipe_transfer *transfer )
+{
+ uint8_t *map = svga_buffer_map_range( pipe->screen,
+ transfer->resource,
+ transfer->box.x,
+ transfer->box.width,
+ transfer->usage );
+ if (map == NULL)
+ return NULL;
+
+ /* map_buffer() returned a pointer to the beginning of the buffer,
+ * but transfers are expected to return a pointer to just the
+ * region specified in the box.
+ */
+ return map + transfer->box.x;
+}
+
+
+
+static void svga_buffer_transfer_flush_region( struct pipe_context *pipe,
+ struct pipe_transfer *transfer,
+ const struct pipe_box *box)
+{
+ assert(box->x + box->width <= transfer->box.width);
+
+ svga_buffer_flush_mapped_range(pipe->screen,
+ transfer->resource,
+ transfer->box.x + box->x,
+ box->width);
+}
+
+static void svga_buffer_transfer_unmap( struct pipe_context *pipe,
+ struct pipe_transfer *transfer )
+{
+ svga_buffer_unmap(pipe->screen,
+ transfer->resource);
+}
+
+
+
+
+
+
+
+struct u_resource_vtbl svga_buffer_vtbl =
+{
+ u_default_resource_get_handle, /* get_handle */
+ svga_buffer_destroy, /* resource_destroy */
+ svga_buffer_is_referenced, /* is_resource_referenced */
+ u_default_get_transfer, /* get_transfer */
+ u_default_transfer_destroy, /* transfer_destroy */
+ svga_buffer_transfer_map, /* transfer_map */
+ svga_buffer_transfer_flush_region, /* transfer_flush_region */
+ svga_buffer_transfer_unmap, /* transfer_unmap */
+ u_default_transfer_inline_write /* transfer_inline_write */
+};
+
+
+
+struct pipe_resource *
+svga_buffer_create(struct pipe_screen *screen,
+ const struct pipe_resource *template)
+{
+ struct svga_screen *ss = svga_screen(screen);
+ struct svga_buffer *sbuf;
+
+ sbuf = CALLOC_STRUCT(svga_buffer);
+ if(!sbuf)
+ goto error1;
+
+ sbuf->b.b = *template;
+ sbuf->b.vtbl = &svga_buffer_vtbl;
+ pipe_reference_init(&sbuf->b.b.reference, 1);
+ sbuf->b.b.screen = screen;
+
+ if(svga_buffer_needs_hw_storage(template->bind)) {
+ if(svga_buffer_create_host_surface(ss, sbuf) != PIPE_OK)
+ goto error2;
+ }
+ else {
+ sbuf->swbuf = align_malloc(template->width0, 64);
+ if(!sbuf->swbuf)
+ goto error2;
+ }
+
+ return &sbuf->b.b;
+
+error2:
+ FREE(sbuf);
+error1:
+ return NULL;
+}
+
+struct pipe_resource *
+svga_user_buffer_create(struct pipe_screen *screen,
+ void *ptr,
+ unsigned bytes,
+ unsigned bind)
+{
+ struct svga_buffer *sbuf;
+
+ sbuf = CALLOC_STRUCT(svga_buffer);
+ if(!sbuf)
+ goto no_sbuf;
+
+ pipe_reference_init(&sbuf->b.b.reference, 1);
+ sbuf->b.vtbl = &svga_buffer_vtbl;
+ sbuf->b.b.screen = screen;
+ sbuf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
+ sbuf->b.b._usage = PIPE_USAGE_IMMUTABLE;
+ sbuf->b.b.bind = bind;
+ sbuf->b.b.width0 = bytes;
+ sbuf->b.b.height0 = 1;
+ sbuf->b.b.depth0 = 1;
+
+ sbuf->swbuf = ptr;
+ sbuf->user = TRUE;
+
+ return &sbuf->b.b;
+
+no_sbuf:
+ return NULL;
+}
+
+
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-27 14:52:12 +0000