diff options
Diffstat (limited to 'dove_bufmgr.c')
| -rw-r--r-- | dove_bufmgr.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/dove_bufmgr.c b/dove_bufmgr.c new file mode 100644 index 0000000..5737bf8 --- /dev/null +++ b/dove_bufmgr.c @@ -0,0 +1,228 @@ +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <sys/mman.h> + +#include <drm.h> + +#include "dove_bufmgr.h" + +#include "dove_ioctl.h" + +#ifndef DRM_IOCTL_MODE_CREATE_DUMB +/* create a dumb scanout buffer */ +struct drm_mode_create_dumb { + uint32_t height; + uint32_t width; + uint32_t bpp; + uint32_t flags; + /* handle, pitch, size will be returned */ + uint32_t handle; + uint32_t pitch; + uint64_t size; +}; +#define DRM_IOCTL_MODE_CREATE_DUMB DRM_IOWR(0xB2, struct drm_mode_create_dumb) +#endif + +#ifndef DRM_IOCTL_MODE_DESTROY_DUMB +struct drm_mode_destroy_dumb { + uint32_t handle; +}; +#define DRM_IOCTL_MODE_DESTROY_DUMB DRM_IOWR(0xB4, struct drm_mode_destroy_dumb) +#endif + +#ifndef DRM_IOCTL_MODE_MAP_DUMB +struct drm_mode_map_dumb { + uint32_t handle; + uint32_t pad; + uint64_t offset; +}; +#define DRM_IOCTL_MODE_MAP_DUMB DRM_IOWR(0xB3, struct drm_mode_map_dumb) +#endif + +struct drm_dove_bo *drm_dove_bo_create_phys(int fd, uint32_t phys, size_t size) +{ + struct drm_dove_bo *bo; + + bo = calloc(1, sizeof *bo); + if (bo) { + struct drm_dove_gem_create_phys arg; + int ret; + + memset(&arg, 0, sizeof(arg)); + arg.phys = phys; + arg.size = size; + + ret = drmIoctl(fd, DRM_IOCTL_DOVE_GEM_CREATE_PHYS, &arg); + if (ret) { + free(bo); + return NULL; + } + bo->ref = 1; + bo->handle = arg.handle; + bo->size = size; + bo->phys = phys; + bo->type = DRM_DOVE_BO_LINEAR; + } + return bo; +} + +struct drm_dove_bo *drm_dove_bo_create(int fd, unsigned w, unsigned h, unsigned bpp) +{ + struct drm_dove_bo *bo; + + bo = calloc(1, sizeof *bo); + if (bo) { + struct drm_dove_gem_create arg; + int ret; + + memset(&arg, 0, sizeof(arg)); + arg.width = w; + arg.height = h; + arg.bpp = bpp; + + ret = drmIoctl(fd, DRM_IOCTL_DOVE_GEM_CREATE, &arg); + if (ret) { + free(bo); + return NULL; + } + bo->ref = 1; + bo->handle = arg.handle; + bo->size = arg.size; + bo->pitch = arg.pitch; + bo->type = DRM_DOVE_BO_SHMEM; + } + return bo; +} + + + +struct drm_dove_bo *drm_dove_bo_dumb_create(int fd, unsigned w, unsigned h, + unsigned bpp) +{ + struct drm_dove_bo *bo; + + bo = calloc(1, sizeof *bo); + if (bo) { + struct drm_mode_create_dumb arg; + int ret; + + memset(&arg, 0, sizeof(arg)); + arg.width = w; + arg.height = h; + arg.bpp = bpp; + + ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg); + if (ret) { + free(bo); + return NULL; + } + bo->ref = 1; + bo->handle = arg.handle; + bo->size = arg.size; + bo->pitch = arg.pitch; + bo->type = DRM_DOVE_BO_DUMB; + } + return bo; +} + +static void drm_dove_bo_dumb_destroy(int fd, struct drm_dove_bo *bo) +{ + struct drm_mode_destroy_dumb arg; + int ret; + + if (bo->ptr) { + munmap(bo->ptr, bo->size); + bo->ptr = NULL; + } + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->handle; + ret = drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg); + if (ret == 0) { + free(bo); + } +} + +void drm_dove_bo_get(int fd, struct drm_dove_bo *bo) +{ + bo->ref++; +} + +void drm_dove_bo_put(int fd, struct drm_dove_bo *bo) +{ + if (bo->ref-- == 1) + drm_dove_bo_dumb_destroy(fd, bo); +} + +int drm_dove_bo_map(int fd, struct drm_dove_bo *bo) +{ + void *map; + int ret; + + if (bo->type == DRM_DOVE_BO_DUMB) { + struct drm_mode_map_dumb arg; + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->handle; + + ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &arg); + if (ret) + return ret; + + map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, + arg.offset); + + if (map == MAP_FAILED) + return -1; + } else if (bo->type == DRM_DOVE_BO_SHMEM) { + struct drm_dove_gem_mmap arg; + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->handle; + arg.offset = 0; + arg.size = bo->size; + + ret = drmIoctl(fd, DRM_IOCTL_DOVE_GEM_MMAP, &arg); + if (ret) + return -1; + + map = (void *)(uintptr_t)arg.addr; + } else { + errno = EINVAL; + return -1; + } + + bo->ptr = map; + + return 0; +} + +uint32_t drm_dove_bo_phys(int fd, struct drm_dove_bo *bo) +{ + struct drm_dove_gem_prop arg; + int ret; + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->handle; + + ret = drmIoctl(fd, DRM_IOCTL_DOVE_GEM_PROP, &arg); + + return ret ? -1 : (uint32_t)arg.phys; +} + +int drm_dove_bo_subdata(int fd, struct drm_dove_bo *bo, unsigned long offset, + unsigned long size, const void *data) +{ + struct drm_dove_gem_pwrite arg; + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->handle; + arg.offset = offset; + arg.size = size; + arg.ptr = (uint64_t)(uintptr_t)data; + + return drmIoctl(fd, DRM_IOCTL_DOVE_GEM_PWRITE, &arg); +} + |