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/**********************************************************
* 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
* Contains the functions for creating dma buffers by calling
* the kernel via driver specific ioctls.
*
* @author Jakob Bornecrantz <jakob@vmware.com>
*/
#ifndef HAVE_STDINT_H
#define HAVE_STDINT_H 1
#endif
#define _FILE_OFFSET_BITS 64
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include "xf86drm.h"
#include "../core/vmwgfx_drm.h"
#include "vmw_driver.h"
#include "util/u_debug.h"
struct vmw_dma_buffer
{
void *data;
unsigned handle;
uint64_t map_handle;
unsigned map_count;
uint32_t size;
};
static int
vmw_ioctl_get_param(struct vmw_driver *vmw, uint32_t param, uint64_t *out)
{
struct drm_vmw_getparam_arg gp_arg;
int ret;
memset(&gp_arg, 0, sizeof(gp_arg));
gp_arg.param = param;
ret = drmCommandWriteRead(vmw->fd, DRM_VMW_GET_PARAM,
&gp_arg, sizeof(gp_arg));
if (ret == 0) {
*out = gp_arg.value;
}
return ret;
}
int
vmw_ioctl_supports_overlay(struct vmw_driver *vmw)
{
uint64_t value;
int ret;
ret = vmw_ioctl_get_param(vmw, DRM_VMW_PARAM_OVERLAY_IOCTL, &value);
if (ret)
return ret;
return value ? 0 : -ENOSYS;
}
int
vmw_ioctl_cursor_bypass(struct vmw_driver *vmw, int xhot, int yhot)
{
struct drm_vmw_cursor_bypass_arg arg;
int ret;
memset(&arg, 0, sizeof(arg));
arg.flags = DRM_VMW_CURSOR_BYPASS_ALL;
arg.xhot = xhot;
arg.yhot = yhot;
ret = drmCommandWrite(vmw->fd, DRM_VMW_CURSOR_BYPASS,
&arg, sizeof(arg));
return ret;
}
struct vmw_dma_buffer *
vmw_ioctl_buffer_create(struct vmw_driver *vmw, uint32_t size, unsigned *handle)
{
struct vmw_dma_buffer *buf;
union drm_vmw_alloc_dmabuf_arg arg;
struct drm_vmw_alloc_dmabuf_req *req = &arg.req;
struct drm_vmw_dmabuf_rep *rep = &arg.rep;
int ret;
buf = xcalloc(1, sizeof(*buf));
if (!buf)
goto err;
memset(&arg, 0, sizeof(arg));
req->size = size;
do {
ret = drmCommandWriteRead(vmw->fd, DRM_VMW_ALLOC_DMABUF, &arg, sizeof(arg));
} while (ret == -ERESTART);
if (ret) {
debug_printf("IOCTL failed %d: %s\n", ret, strerror(-ret));
goto err_free;
}
buf->data = NULL;
buf->handle = rep->handle;
buf->map_handle = rep->map_handle;
buf->map_count = 0;
buf->size = size;
*handle = rep->handle;
return buf;
err_free:
xfree(buf);
err:
return NULL;
}
void
vmw_ioctl_buffer_destroy(struct vmw_driver *vmw, struct vmw_dma_buffer *buf)
{
struct drm_vmw_unref_dmabuf_arg arg;
if (buf->data) {
munmap(buf->data, buf->size);
buf->data = NULL;
}
memset(&arg, 0, sizeof(arg));
arg.handle = buf->handle;
drmCommandWrite(vmw->fd, DRM_VMW_UNREF_DMABUF, &arg, sizeof(arg));
xfree(buf);
}
void *
vmw_ioctl_buffer_map(struct vmw_driver *vmw, struct vmw_dma_buffer *buf)
{
void *map;
if (buf->data == NULL) {
map = mmap(NULL, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
vmw->fd, buf->map_handle);
if (map == MAP_FAILED) {
debug_printf("%s: Map failed.\n", __FUNCTION__);
return NULL;
}
buf->data = map;
}
++buf->map_count;
return buf->data;
}
void
vmw_ioctl_buffer_unmap(struct vmw_driver *vmw, struct vmw_dma_buffer *buf)
{
--buf->map_count;
}
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