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/*
* Copyright © 2008 Dave Airlie
* Copyright © 2008 Jérôme Glisse
* 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 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
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*/
/*
* Authors:
* Dave Airlie
* Jérôme Glisse <glisse@freedesktop.org>
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include "xf86drm.h"
#include "drm.h"
#include "radeon_drm.h"
#include "radeon_bo.h"
#include "radeon_bo_gem.h"
struct radeon_bo_gem {
struct radeon_bo base;
int ref_count;
int map_count;
};
static struct radeon_bo *bo_open(struct radeon_bo_manager *bom,
uint32_t handle,
uint32_t size,
uint32_t alignment,
uint32_t flags)
{
struct radeon_bo_gem *bo;
int r;
bo = (struct radeon_bo_gem*)calloc(1, sizeof(struct radeon_bo_gem));
if (bo == NULL) {
return NULL;
}
bo->base.bom = bom;
bo->base.handle = 0;
bo->base.size = size;
bo->base.alignment = alignment;
bo->base.flags = flags;
bo->base.ptr = NULL;
bo->ref_count = 0;
bo->map_count = 0;
if (handle) {
struct drm_gem_open open_arg;
memset(&open_arg, 0, sizeof(open_arg));
open_arg.name = handle;
r = ioctl(bom->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
if (r != 0) {
fprintf(stderr, "GEM open failed: %d (%s)\n",r,strerror(r));
free(bo);
return NULL;
}
bo->base.handle = handle;
} else {
struct drm_radeon_gem_create args;
args.size = size;
args.alignment = alignment;
args.initial_domain = RADEON_GEM_DOMAIN_CPU;
args.no_backing_store = 0;
r = drmCommandWriteRead(bom->fd, DRM_RADEON_GEM_CREATE,
&args, sizeof(args));
bo->base.handle = args.handle;
if (r) {
free(bo);
return NULL;
}
}
return (struct radeon_bo*)bo;
}
static void bo_close(struct radeon_bo *bo)
{
struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
struct drm_gem_close args;
if (bo == NULL) {
return;
}
if (bo_gem->ref_count) {
/* FIXME: what to do ? */
}
if (bo_gem->map_count) {
munmap(bo->ptr, bo->size);
}
/* close object */
args.handle = bo->handle;
ioctl(bo->bom->fd, DRM_IOCTL_GEM_CLOSE, &args);
free(bo_gem);
}
static void bo_pin(struct radeon_bo *bo)
{
struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
bo_gem->ref_count++;
}
static void bo_unpin(struct radeon_bo *bo)
{
struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
bo_gem->ref_count--;
}
static int bo_map(struct radeon_bo *bo, unsigned int flags)
{
struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
struct drm_radeon_gem_mmap args;
int r;
if (bo_gem->map_count++ != 0) {
return 0;
}
args.handle = bo->handle;
args.offset = 0;
args.size = bo->size;
r = drmCommandWriteRead(bo->bom->fd,
DRM_RADEON_GEM_MMAP,
&args,
sizeof(args));
if (!r) {
bo->ptr = (void *)(unsigned long)args.addr_ptr;
}
return r;
}
static int bo_unmap(struct radeon_bo *bo)
{
struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
if (--bo_gem->map_count > 0) {
return 0;
}
munmap(bo->ptr, bo->size);
bo->ptr = NULL;
return 0;
}
static struct radeon_bo_funcs bo_gem_funcs = {
bo_open,
bo_close,
bo_pin,
bo_unpin,
bo_map,
bo_unmap
};
struct radeon_bo_funcs *radeon_bo_gem_initialize(int fd)
{
return &bo_gem_funcs;
}
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