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#include "gem_msm.h"
#include "drm-uapi/msm_drm.h"
#include "drm.h"
static int gem_msm_mmap(void **ptr, int drm_fd, uint32_t gem_handle, size_t size)
{
struct drm_msm_gem_cpu_prep gem_prep = {
.handle = gem_handle,
.op = MSM_PREP_READ,
.timeout = { .tv_sec = 1, .tv_nsec = 0 }
};
if (drmIoctl(drm_fd, DRM_IOCTL_MSM_GEM_CPU_PREP, &gem_prep))
{
return -1;
}
struct drm_msm_gem_info gem_info = {
.handle = gem_handle,
.flags = 0,
.offset = 0
};
if (drmIoctl(drm_fd, DRM_IOCTL_MSM_GEM_INFO, &gem_info))
{
return -1;
}
void *const k_addr = 0;
const int k_prot = PROT_READ | PROT_WRITE;
const int k_flags = MAP_SHARED;
void *ret = mmap(k_addr, size, k_prot, k_flags, drm_fd, gem_info.offset);
if (ret == MAP_FAILED)
{
return -1;
}
*ptr = ret;
return 0;
}
static int gem_msm_munmap(int drm_fd, uint32_t gem_handle, void *ptr, size_t size)
{
if (munmap(ptr, size))
{
return -1;
}
struct drm_msm_gem_cpu_fini gem_fini = {
.handle = gem_handle
};
if (drmIoctl(drm_fd, DRM_IOCTL_MSM_GEM_CPU_FINI, &gem_fini))
{
return -1;
}
return 0;
}
struct gem_driver gem_msm_driver = {
.mmap = gem_msm_mmap,
.munmap = gem_msm_munmap
};
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