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/*
* Copyright © 2018 Google, Inc.
* Copyright © 2015 Intel Corporation
*
* 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 (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 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 <stdint.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <msm_drm.h>
#include "tu_private.h"
static int
tu_ioctl(int fd, unsigned long request, void *arg)
{
int ret;
do {
ret = ioctl(fd, request, arg);
} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
return ret;
}
/**
* Return gem handle on success. Return 0 on failure.
*/
uint32_t
tu_gem_new(struct tu_device *dev, uint64_t size, uint32_t flags)
{
struct drm_msm_gem_new req = {
.size = size,
.flags = flags,
};
int ret = tu_ioctl(dev->physical_device->local_fd, DRM_MSM_GEM_NEW, &req);
if (ret)
return 0;
return req.handle;
}
void
tu_gem_close(struct tu_device *dev, uint32_t gem_handle)
{
struct drm_gem_close req = {
.handle = gem_handle,
};
tu_ioctl(dev->physical_device->local_fd, DRM_IOCTL_GEM_CLOSE, &req);
}
/** Return UINT64_MAX on error. */
static uint64_t
tu_gem_info(struct tu_device *dev, uint32_t gem_handle, uint32_t flags)
{
struct drm_msm_gem_info req = {
.handle = gem_handle,
.flags = flags,
};
int ret = tu_ioctl(dev->physical_device->local_fd, DRM_MSM_GEM_INFO, &req);
if (ret == -1)
return UINT64_MAX;
return req.offset;
}
/** Return UINT64_MAX on error. */
uint64_t
tu_gem_info_offset(struct tu_device *dev, uint32_t gem_handle)
{
return tu_gem_info(dev, gem_handle, 0);
}
/** Return UINT64_MAX on error. */
uint64_t
tu_gem_info_iova(struct tu_device *dev, uint32_t gem_handle)
{
return tu_gem_info(dev, gem_handle, MSM_INFO_IOVA);
}
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