diff options
Diffstat (limited to 'libkms/exynos.c')
| -rw-r--r-- | libkms/exynos.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/libkms/exynos.c b/libkms/exynos.c new file mode 100644 index 00000000..93e36a12 --- /dev/null +++ b/libkms/exynos.c @@ -0,0 +1,207 @@ +/* exynos.c + * + * Copyright 2009 Samsung Electronics Co., Ltd. + * Authors: + * SooChan Lim <sc1.lim@samsung.com> + * Sangjin LEE <lsj119@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#define HAVE_STDINT_H +#define _FILE_OFFSET_BITS 64 + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "internal.h" + +#include <sys/mman.h> +#include <sys/ioctl.h> +#include "xf86drm.h" + +#include "exynos_drm.h" + +struct exynos_bo +{ + struct kms_bo base; + unsigned map_count; +}; + +static int +exynos_get_prop(struct kms_driver *kms, unsigned key, unsigned *out) +{ + switch (key) { + case KMS_BO_TYPE: + *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8; + break; + default: + return -EINVAL; + } + return 0; +} + +static int +exynos_destroy(struct kms_driver *kms) +{ + free(kms); + return 0; +} + +static int +exynos_bo_create(struct kms_driver *kms, + const unsigned width, const unsigned height, + const enum kms_bo_type type, const unsigned *attr, + struct kms_bo **out) +{ + struct drm_exynos_gem_create arg; + unsigned size, pitch; + struct exynos_bo *bo; + int i, ret; + + for (i = 0; attr[i]; i += 2) { + switch (attr[i]) { + case KMS_WIDTH: + case KMS_HEIGHT: + case KMS_BO_TYPE: + break; + default: + return -EINVAL; + } + } + + bo = calloc(1, sizeof(*bo)); + if (!bo) + return -ENOMEM; + + if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) { + pitch = 64 * 4; + size = 64 * 64 * 4; + } else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) { + pitch = width * 4; + pitch = (pitch + 512 - 1) & ~(512 - 1); + size = pitch * ((height + 4 - 1) & ~(4 - 1)); + } else { + return -EINVAL; + } + + memset(&arg, 0, sizeof(arg)); + arg.size = size; + + ret = drmCommandWriteRead(kms->fd, DRM_EXYNOS_GEM_CREATE, &arg, sizeof(arg)); + if (ret) + goto err_free; + + bo->base.kms = kms; + bo->base.handle = arg.handle; + bo->base.size = size; + bo->base.pitch = pitch; + + *out = &bo->base; + + return 0; + +err_free: + free(bo); + return ret; +} + +static int +exynos_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out) +{ + switch (key) { + default: + return -EINVAL; + } +} + +static int +exynos_bo_map(struct kms_bo *_bo, void **out) +{ + struct exynos_bo *bo = (struct exynos_bo *)_bo; + struct drm_exynos_gem_map_off arg; + void *map = NULL; + int ret; + + if (bo->base.ptr) { + bo->map_count++; + *out = bo->base.ptr; + return 0; + } + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->base.handle; + + ret = drmCommandWriteRead(bo->base.kms->fd, DRM_EXYNOS_GEM_MAP_OFFSET, &arg, sizeof(arg)); + if (ret) + return ret; + + map = mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset); + if (map == MAP_FAILED) + return -errno; + + bo->base.ptr = map; + bo->map_count++; + *out = bo->base.ptr; + + return 0; +} + +static int +exynos_bo_unmap(struct kms_bo *_bo) +{ + struct exynos_bo *bo = (struct exynos_bo *)_bo; + bo->map_count--; + return 0; +} + +static int +exynos_bo_destroy(struct kms_bo *_bo) +{ + struct exynos_bo *bo = (struct exynos_bo *)_bo; + struct drm_gem_close arg; + int ret; + + if (bo->base.ptr) { + /* XXX Sanity check map_count */ + munmap(bo->base.ptr, bo->base.size); + bo->base.ptr = NULL; + } + + memset(&arg, 0, sizeof(arg)); + arg.handle = bo->base.handle; + + ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg); + if (ret) + return -errno; + + free(bo); + return 0; +} + +int +exynos_create(int fd, struct kms_driver **out) +{ + struct kms_driver *kms; + + kms = calloc(1, sizeof(*kms)); + if (!kms) + return -ENOMEM; + + kms->fd = fd; + + kms->bo_create = exynos_bo_create; + kms->bo_map = exynos_bo_map; + kms->bo_unmap = exynos_bo_unmap; + kms->bo_get_prop = exynos_bo_get_prop; + kms->bo_destroy = exynos_bo_destroy; + kms->get_prop = exynos_get_prop; + kms->destroy = exynos_destroy; + *out = kms; + + return 0; +} |