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/*
* Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
*
* 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
* on 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 above copyright notice and this permission notice (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR 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.
*
* Authors:
* Jerome Glisse
*/
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <errno.h>
#include "radeon_priv.h"
#include "xf86drm.h"
#include "radeon_drm.h"
struct radeon_bo *radeon_bo(struct radeon *radeon, unsigned handle,
unsigned size, unsigned alignment, void *ptr)
{
struct radeon_bo *bo;
int r;
bo = calloc(1, sizeof(*bo));
if (bo == NULL) {
return NULL;
}
bo->size = size;
bo->handle = handle;
bo->refcount = 1;
bo->alignment = alignment;
if (handle) {
struct drm_gem_open open_arg;
memset(&open_arg, 0, sizeof(open_arg));
open_arg.name = handle;
r = drmIoctl(radeon->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
if (r != 0) {
free(bo);
return NULL;
}
bo->handle = open_arg.handle;
bo->size = open_arg.size;
} else {
struct drm_radeon_gem_create args;
args.size = size;
args.alignment = alignment;
args.initial_domain = RADEON_GEM_DOMAIN_CPU;
args.flags = 0;
args.handle = 0;
r = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_CREATE,
&args, sizeof(args));
bo->handle = args.handle;
if (r) {
fprintf(stderr, "Failed to allocate :\n");
fprintf(stderr, " size : %d bytes\n", size);
fprintf(stderr, " alignment : %d bytes\n", alignment);
free(bo);
return NULL;
}
}
if (ptr) {
if (radeon_bo_map(radeon, bo)) {
fprintf(stderr, "%s failed to copy data into bo\n", __func__);
return radeon_bo_decref(radeon, bo);
}
memcpy(bo->data, ptr, size);
radeon_bo_unmap(radeon, bo);
}
return bo;
}
int radeon_bo_map(struct radeon *radeon, struct radeon_bo *bo)
{
struct drm_radeon_gem_mmap args;
void *ptr;
int r;
if (bo->map_count++ != 0) {
return 0;
}
/* Zero out args to make valgrind happy */
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
args.offset = 0;
args.size = (uint64_t)bo->size;
r = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_MMAP,
&args, sizeof(args));
if (r) {
fprintf(stderr, "error mapping %p 0x%08X (error = %d)\n",
bo, bo->handle, r);
return r;
}
ptr = mmap(0, args.size, PROT_READ|PROT_WRITE, MAP_SHARED, radeon->fd, args.addr_ptr);
if (ptr == MAP_FAILED) {
fprintf(stderr, "%s failed to map bo\n", __func__);
return -errno;
}
bo->data = ptr;
return 0;
}
void radeon_bo_unmap(struct radeon *radeon, struct radeon_bo *bo)
{
if (--bo->map_count > 0) {
return;
}
munmap(bo->data, bo->size);
bo->data = NULL;
}
struct radeon_bo *radeon_bo_incref(struct radeon *radeon, struct radeon_bo *bo)
{
bo->refcount++;
return bo;
}
struct radeon_bo *radeon_bo_decref(struct radeon *radeon, struct radeon_bo *bo)
{
struct drm_gem_close args;
if (bo == NULL)
return NULL;
if (--bo->refcount > 0) {
return NULL;
}
munmap(bo->data, bo->size);
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
drmIoctl(radeon->fd, DRM_IOCTL_GEM_CLOSE, &args);
memset(bo, 0, sizeof(struct radeon_bo));
free(bo);
return NULL;
}
int radeon_bo_wait(struct radeon *radeon, struct radeon_bo *bo)
{
struct drm_radeon_gem_wait_idle args;
int ret;
/* Zero out args to make valgrind happy */
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
do {
ret = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_WAIT_IDLE,
&args, sizeof(args));
} while (ret == -EBUSY);
return ret;
}
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