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/**********************************************************
* 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.
*
**********************************************************/
#ifndef SVGA_BUFFER_H
#define SVGA_BUFFER_H
#include "pipe/p_compiler.h"
#include "pipe/p_state.h"
#include "util/u_double_list.h"
#include "svga_screen_cache.h"
#define SVGA_BUFFER_MAGIC 0x344f9005
/**
* Maximum number of discontiguous ranges
*/
#define SVGA_BUFFER_MAX_RANGES 32
struct svga_screen;
struct svga_context;
struct svga_winsys_buffer;
struct svga_winsys_surface;
struct svga_buffer_range
{
unsigned start;
unsigned end;
};
/**
* SVGA pipe buffer.
*/
struct svga_buffer
{
struct pipe_buffer base;
/**
* Marker to detect bad casts in runtime.
*/
uint32_t magic;
/**
* Regular (non DMA'able) memory.
*
* Used for user buffers or for buffers which we know before hand that can
* never be used by the virtual hardware directly, such as constant buffers.
*/
void *swbuf;
/**
* Whether swbuf was created by the user or not.
*/
boolean user;
/**
* Creation key for the host surface handle.
*
* This structure describes all the host surface characteristics so that it
* can be looked up in cache, since creating a host surface is often a slow
* operation.
*/
struct svga_host_surface_cache_key key;
/**
* Host surface handle.
*
* This is a platform independent abstraction for host SID. We create when
* trying to bind
*/
struct svga_winsys_surface *handle;
/**
* Information about ongoing and past map operations.
*/
struct {
/**
* Number of concurrent mappings.
*
* XXX: It is impossible to guarantee concurrent maps work in all
* circumstances -- pipe_buffers really need transfer objects too.
*/
unsigned count;
/**
* Whether this buffer is currently mapped for writing.
*/
boolean writing;
/**
* Whether the application will tell us explicity which ranges it touched
* or not.
*/
boolean flush_explicit;
/**
* Dirty ranges.
*
* Ranges that were touched by the application and need to be uploaded to
* the host.
*
* This information will be copied into dma.boxes, when emiting the
* SVGA3dCmdSurfaceDMA command.
*/
struct svga_buffer_range ranges[SVGA_BUFFER_MAX_RANGES];
unsigned num_ranges;
} map;
/**
* Information about uploaded version of user buffers.
*/
struct {
struct pipe_buffer *buffer;
/**
* We combine multiple user buffers into the same hardware buffer. This
* is the relative offset within that buffer.
*/
unsigned offset;
} uploaded;
/**
* DMA'ble memory.
*
* A piece of GMR memory, with the same size of the buffer. It is created
* when mapping the buffer, and will be used to upload vertex data to the
* host.
*/
struct svga_winsys_buffer *hwbuf;
/**
* Information about pending DMA uploads.
*
*/
struct {
/**
* Whether this buffer has an unfinished DMA upload command.
*
* If not set then the rest of the information is null.
*/
boolean pending;
SVGA3dSurfaceDMAFlags flags;
/**
* Pointer to the DMA copy box *inside* the command buffer.
*/
SVGA3dCopyBox *boxes;
/**
* Context that has the pending DMA to this buffer.
*/
struct svga_context *svga;
} dma;
/**
* Linked list head, used to gather all buffers with pending dma uploads on
* a context. It is only valid if the dma.pending is set above.
*/
struct list_head head;
};
static INLINE struct svga_buffer *
svga_buffer(struct pipe_buffer *buffer)
{
if (buffer) {
assert(((struct svga_buffer *)buffer)->magic == SVGA_BUFFER_MAGIC);
return (struct svga_buffer *)buffer;
}
return NULL;
}
/**
* Returns TRUE for user buffers. We may
* decide to use an alternate upload path for these buffers.
*/
static INLINE boolean
svga_buffer_is_user_buffer( struct pipe_buffer *buffer )
{
return svga_buffer(buffer)->user;
}
void
svga_screen_init_buffer_functions(struct pipe_screen *screen);
/**
* Get the host surface handle for this buffer.
*
* This will ensure the host surface is updated, issuing DMAs as needed.
*
* NOTE: This may insert new commands in the context, so it *must* be called
* before reserving command buffer space. And, in order to insert commands
* it may need to call svga_context_flush().
*/
struct svga_winsys_surface *
svga_buffer_handle(struct svga_context *svga,
struct pipe_buffer *buf);
void
svga_context_flush_buffers(struct svga_context *svga);
struct svga_winsys_buffer *
svga_winsys_buffer_create(struct svga_screen *ss,
unsigned alignment,
unsigned usage,
unsigned size);
#endif /* SVGA_BUFFER_H */
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