1 /* 2 * Copyright 2014 NVIDIA Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <errno.h> 29 #include <string.h> 30 31 #include <sys/mman.h> 32 33 #include <drm_fourcc.h> 34 35 #include "xf86drm.h" 36 37 #include "libkms-test.h" 38 39 struct kms_framebuffer *kms_framebuffer_create(struct kms_device *device, 40 unsigned int width, 41 unsigned int height, 42 uint32_t format) 43 { 44 uint32_t handles[4], pitches[4], offsets[4]; 45 struct drm_mode_create_dumb args; 46 struct kms_framebuffer *fb; 47 int err; 48 49 fb = calloc(1, sizeof(*fb)); 50 if (!fb) 51 return NULL; 52 53 fb->device = device; 54 fb->width = width; 55 fb->height = height; 56 fb->format = format; 57 58 memset(&args, 0, sizeof(args)); 59 args.width = width; 60 args.height = height; 61 62 switch (format) { 63 case DRM_FORMAT_XRGB8888: 64 case DRM_FORMAT_XBGR8888: 65 case DRM_FORMAT_RGBA8888: 66 args.bpp = 32; 67 break; 68 69 default: 70 free(fb); 71 return NULL; 72 } 73 74 err = drmIoctl(device->fd, DRM_IOCTL_MODE_CREATE_DUMB, &args); 75 if (err < 0) { 76 free(fb); 77 return NULL; 78 } 79 80 fb->handle = args.handle; 81 fb->pitch = args.pitch; 82 fb->size = args.size; 83 84 handles[0] = fb->handle; 85 pitches[0] = fb->pitch; 86 offsets[0] = 0; 87 88 err = drmModeAddFB2(device->fd, width, height, format, handles, 89 pitches, offsets, &fb->id, 0); 90 if (err < 0) { 91 kms_framebuffer_free(fb); 92 return NULL; 93 } 94 95 return fb; 96 } 97 98 void kms_framebuffer_free(struct kms_framebuffer *fb) 99 { 100 struct kms_device *device = fb->device; 101 struct drm_mode_destroy_dumb args; 102 int err; 103 104 if (fb->id) { 105 err = drmModeRmFB(device->fd, fb->id); 106 if (err < 0) { 107 /* not much we can do now */ 108 } 109 } 110 111 memset(&args, 0, sizeof(args)); 112 args.handle = fb->handle; 113 114 err = drmIoctl(device->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &args); 115 if (err < 0) { 116 /* not much we can do now */ 117 } 118 119 free(fb); 120 } 121 122 int kms_framebuffer_map(struct kms_framebuffer *fb, void **ptrp) 123 { 124 struct kms_device *device = fb->device; 125 struct drm_mode_map_dumb args; 126 void *ptr; 127 int err; 128 129 if (fb->ptr) { 130 *ptrp = fb->ptr; 131 return 0; 132 } 133 134 memset(&args, 0, sizeof(args)); 135 args.handle = fb->handle; 136 137 err = drmIoctl(device->fd, DRM_IOCTL_MODE_MAP_DUMB, &args); 138 if (err < 0) 139 return -errno; 140 141 ptr = mmap(0, fb->size, PROT_READ | PROT_WRITE, MAP_SHARED, 142 device->fd, args.offset); 143 if (ptr == MAP_FAILED) 144 return -errno; 145 146 *ptrp = fb->ptr = ptr; 147 148 return 0; 149 } 150 151 void kms_framebuffer_unmap(struct kms_framebuffer *fb) 152 { 153 if (fb->ptr) { 154 munmap(fb->ptr, fb->size); 155 fb->ptr = NULL; 156 } 157 } 158
