diff options
Diffstat (limited to 'libkms/dumb.c')
| -rw-r--r-- | libkms/dumb.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/libkms/dumb.c b/libkms/dumb.c new file mode 100644 index 00000000..3be5f7a2 --- /dev/null +++ b/libkms/dumb.c @@ -0,0 +1,220 @@ +/************************************************************************** + * + * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA + * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + + +#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 "i915_drm.h" + +struct dumb_bo +{ + struct kms_bo base; + unsigned map_count; +}; + +static int +dumb_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 +dumb_destroy(struct kms_driver *kms) +{ + free(kms); + return 0; +} + +static int +dumb_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_mode_create_dumb arg; + struct dumb_bo *bo; + int i, ret; + + for (i = 0; attr[i]; i += 2) { + switch (attr[i]) { + case KMS_WIDTH: + case KMS_HEIGHT: + break; + case KMS_BO_TYPE: + break; + default: + return -EINVAL; + } + } + + bo = calloc(1, sizeof(*bo)); + if (!bo) + return -ENOMEM; + + memset(&arg, 0, sizeof(arg)); + + arg.bpp = 16; + arg.width = width; + arg.height = height; + + ret = drmIoctl(kms->fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg); + if (ret) + goto err_free; + + bo->base.kms = kms; + bo->base.handle = arg.handle; + bo->base.size = arg.size; + bo->base.pitch = arg.pitch; + + *out = &bo->base; + + return 0; + +err_free: + free(bo); + return ret; +} + +static int +dumb_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out) +{ + switch (key) { + default: + return -EINVAL; + } +} + +static int +dumb_bo_map(struct kms_bo *_bo, void **out) +{ + struct dumb_bo *bo = (struct dumb_bo *)_bo; + struct drm_mode_map_dumb 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 = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_MAP_DUMB, &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 +dumb_bo_unmap(struct kms_bo *_bo) +{ + struct dumb_bo *bo = (struct dumb_bo *)_bo; + bo->map_count--; + return 0; +} + +static int +dumb_bo_destroy(struct kms_bo *_bo) +{ + struct dumb_bo *bo = (struct dumb_bo *)_bo; + struct drm_mode_destroy_dumb 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_MODE_DESTROY_DUMB, &arg); + if (ret) + return -errno; + + free(bo); + return 0; +} + +int +dumb_create(int fd, struct kms_driver **out) +{ + struct kms_driver *kms; + int ret; + uint64_t cap = 0; + + ret = drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &cap); + if (ret || cap == 0) + return -EINVAL; + + kms = calloc(1, sizeof(*kms)); + if (!kms) + return -ENOMEM; + + kms->fd = fd; + + kms->bo_create = dumb_bo_create; + kms->bo_map = dumb_bo_map; + kms->bo_unmap = dumb_bo_unmap; + kms->bo_get_prop = dumb_bo_get_prop; + kms->bo_destroy = dumb_bo_destroy; + kms->get_prop = dumb_get_prop; + kms->destroy = dumb_destroy; + *out = kms; + + return 0; +} |