1 /* 2 * Copyright (C) 2012-2013 Avionic Design GmbH 3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. 4 * 5 * Based on the KMS/FB CMA helpers 6 * Copyright (C) 2012 Analog Device Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/console.h> 14 15 #include "drm.h" 16 #include "gem.h" 17 #include <drm/drm_gem_framebuffer_helper.h> 18 #include <drm/drm_modeset_helper.h> 19 20 #ifdef CONFIG_DRM_FBDEV_EMULATION 21 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper) 22 { 23 return container_of(helper, struct tegra_fbdev, base); 24 } 25 #endif 26 27 struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer, 28 unsigned int index) 29 { 30 return to_tegra_bo(drm_gem_fb_get_obj(framebuffer, index)); 31 } 32 33 bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer) 34 { 35 struct tegra_bo *bo = tegra_fb_get_plane(framebuffer, 0); 36 37 if (bo->flags & TEGRA_BO_BOTTOM_UP) 38 return true; 39 40 return false; 41 } 42 43 int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer, 44 struct tegra_bo_tiling *tiling) 45 { 46 uint64_t modifier = framebuffer->modifier; 47 48 switch (modifier) { 49 case DRM_FORMAT_MOD_LINEAR: 50 tiling->mode = TEGRA_BO_TILING_MODE_PITCH; 51 tiling->value = 0; 52 break; 53 54 case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED: 55 tiling->mode = TEGRA_BO_TILING_MODE_TILED; 56 tiling->value = 0; 57 break; 58 59 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0): 60 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 61 tiling->value = 0; 62 break; 63 64 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1): 65 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 66 tiling->value = 1; 67 break; 68 69 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2): 70 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 71 tiling->value = 2; 72 break; 73 74 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3): 75 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 76 tiling->value = 3; 77 break; 78 79 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4): 80 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 81 tiling->value = 4; 82 break; 83 84 case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5): 85 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; 86 tiling->value = 5; 87 break; 88 89 default: 90 return -EINVAL; 91 } 92 93 return 0; 94 } 95 96 static const struct drm_framebuffer_funcs tegra_fb_funcs = { 97 .destroy = drm_gem_fb_destroy, 98 .create_handle = drm_gem_fb_create_handle, 99 }; 100 101 static struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm, 102 const struct drm_mode_fb_cmd2 *mode_cmd, 103 struct tegra_bo **planes, 104 unsigned int num_planes) 105 { 106 struct drm_framebuffer *fb; 107 unsigned int i; 108 int err; 109 110 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 111 if (!fb) 112 return ERR_PTR(-ENOMEM); 113 114 drm_helper_mode_fill_fb_struct(drm, fb, mode_cmd); 115 116 for (i = 0; i < fb->format->num_planes; i++) 117 fb->obj[i] = &planes[i]->gem; 118 119 err = drm_framebuffer_init(drm, fb, &tegra_fb_funcs); 120 if (err < 0) { 121 dev_err(drm->dev, "failed to initialize framebuffer: %d\n", 122 err); 123 kfree(fb); 124 return ERR_PTR(err); 125 } 126 127 return fb; 128 } 129 130 struct drm_framebuffer *tegra_fb_create(struct drm_device *drm, 131 struct drm_file *file, 132 const struct drm_mode_fb_cmd2 *cmd) 133 { 134 const struct drm_format_info *info = drm_get_format_info(drm, cmd); 135 struct tegra_bo *planes[4]; 136 struct drm_gem_object *gem; 137 struct drm_framebuffer *fb; 138 unsigned int i; 139 int err; 140 141 for (i = 0; i < info->num_planes; i++) { 142 unsigned int width = cmd->width / (i ? info->hsub : 1); 143 unsigned int height = cmd->height / (i ? info->vsub : 1); 144 unsigned int size, bpp; 145 146 gem = drm_gem_object_lookup(file, cmd->handles[i]); 147 if (!gem) { 148 err = -ENXIO; 149 goto unreference; 150 } 151 152 bpp = info->cpp[i]; 153 154 size = (height - 1) * cmd->pitches[i] + 155 width * bpp + cmd->offsets[i]; 156 157 if (gem->size < size) { 158 err = -EINVAL; 159 goto unreference; 160 } 161 162 planes[i] = to_tegra_bo(gem); 163 } 164 165 fb = tegra_fb_alloc(drm, cmd, planes, i); 166 if (IS_ERR(fb)) { 167 err = PTR_ERR(fb); 168 goto unreference; 169 } 170 171 return fb; 172 173 unreference: 174 while (i--) 175 drm_gem_object_put_unlocked(&planes[i]->gem); 176 177 return ERR_PTR(err); 178 } 179 180 #ifdef CONFIG_DRM_FBDEV_EMULATION 181 static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) 182 { 183 struct drm_fb_helper *helper = info->par; 184 struct tegra_bo *bo; 185 int err; 186 187 bo = tegra_fb_get_plane(helper->fb, 0); 188 189 err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma); 190 if (err < 0) 191 return err; 192 193 return __tegra_gem_mmap(&bo->gem, vma); 194 } 195 196 static struct fb_ops tegra_fb_ops = { 197 .owner = THIS_MODULE, 198 DRM_FB_HELPER_DEFAULT_OPS, 199 .fb_fillrect = drm_fb_helper_sys_fillrect, 200 .fb_copyarea = drm_fb_helper_sys_copyarea, 201 .fb_imageblit = drm_fb_helper_sys_imageblit, 202 .fb_mmap = tegra_fb_mmap, 203 }; 204 205 static int tegra_fbdev_probe(struct drm_fb_helper *helper, 206 struct drm_fb_helper_surface_size *sizes) 207 { 208 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper); 209 struct tegra_drm *tegra = helper->dev->dev_private; 210 struct drm_device *drm = helper->dev; 211 struct drm_mode_fb_cmd2 cmd = { 0 }; 212 unsigned int bytes_per_pixel; 213 struct drm_framebuffer *fb; 214 unsigned long offset; 215 struct fb_info *info; 216 struct tegra_bo *bo; 217 size_t size; 218 int err; 219 220 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); 221 222 cmd.width = sizes->surface_width; 223 cmd.height = sizes->surface_height; 224 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel, 225 tegra->pitch_align); 226 227 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 228 sizes->surface_depth); 229 230 size = cmd.pitches[0] * cmd.height; 231 232 bo = tegra_bo_create(drm, size, 0); 233 if (IS_ERR(bo)) 234 return PTR_ERR(bo); 235 236 info = drm_fb_helper_alloc_fbi(helper); 237 if (IS_ERR(info)) { 238 dev_err(drm->dev, "failed to allocate framebuffer info\n"); 239 drm_gem_object_put_unlocked(&bo->gem); 240 return PTR_ERR(info); 241 } 242 243 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1); 244 if (IS_ERR(fbdev->fb)) { 245 err = PTR_ERR(fbdev->fb); 246 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n", 247 err); 248 drm_gem_object_put_unlocked(&bo->gem); 249 return PTR_ERR(fbdev->fb); 250 } 251 252 fb = fbdev->fb; 253 helper->fb = fb; 254 helper->fbdev = info; 255 256 info->fbops = &tegra_fb_ops; 257 258 drm_fb_helper_fill_info(info, helper, sizes); 259 260 offset = info->var.xoffset * bytes_per_pixel + 261 info->var.yoffset * fb->pitches[0]; 262 263 if (bo->pages) { 264 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP, 265 pgprot_writecombine(PAGE_KERNEL)); 266 if (!bo->vaddr) { 267 dev_err(drm->dev, "failed to vmap() framebuffer\n"); 268 err = -ENOMEM; 269 goto destroy; 270 } 271 } 272 273 drm->mode_config.fb_base = (resource_size_t)bo->paddr; 274 info->screen_base = (void __iomem *)bo->vaddr + offset; 275 info->screen_size = size; 276 info->fix.smem_start = (unsigned long)(bo->paddr + offset); 277 info->fix.smem_len = size; 278 279 return 0; 280 281 destroy: 282 drm_framebuffer_remove(fb); 283 return err; 284 } 285 286 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = { 287 .fb_probe = tegra_fbdev_probe, 288 }; 289 290 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm) 291 { 292 struct tegra_fbdev *fbdev; 293 294 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 295 if (!fbdev) { 296 dev_err(drm->dev, "failed to allocate DRM fbdev\n"); 297 return ERR_PTR(-ENOMEM); 298 } 299 300 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs); 301 302 return fbdev; 303 } 304 305 static void tegra_fbdev_free(struct tegra_fbdev *fbdev) 306 { 307 kfree(fbdev); 308 } 309 310 static int tegra_fbdev_init(struct tegra_fbdev *fbdev, 311 unsigned int preferred_bpp, 312 unsigned int num_crtc, 313 unsigned int max_connectors) 314 { 315 struct drm_device *drm = fbdev->base.dev; 316 int err; 317 318 err = drm_fb_helper_init(drm, &fbdev->base, max_connectors); 319 if (err < 0) { 320 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n", 321 err); 322 return err; 323 } 324 325 err = drm_fb_helper_single_add_all_connectors(&fbdev->base); 326 if (err < 0) { 327 dev_err(drm->dev, "failed to add connectors: %d\n", err); 328 goto fini; 329 } 330 331 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp); 332 if (err < 0) { 333 dev_err(drm->dev, "failed to set initial configuration: %d\n", 334 err); 335 goto fini; 336 } 337 338 return 0; 339 340 fini: 341 drm_fb_helper_fini(&fbdev->base); 342 return err; 343 } 344 345 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev) 346 { 347 drm_fb_helper_unregister_fbi(&fbdev->base); 348 349 if (fbdev->fb) { 350 struct tegra_bo *bo = tegra_fb_get_plane(fbdev->fb, 0); 351 352 /* Undo the special mapping we made in fbdev probe. */ 353 if (bo && bo->pages) { 354 vunmap(bo->vaddr); 355 bo->vaddr = NULL; 356 } 357 358 drm_framebuffer_remove(fbdev->fb); 359 } 360 361 drm_fb_helper_fini(&fbdev->base); 362 tegra_fbdev_free(fbdev); 363 } 364 #endif 365 366 int tegra_drm_fb_prepare(struct drm_device *drm) 367 { 368 #ifdef CONFIG_DRM_FBDEV_EMULATION 369 struct tegra_drm *tegra = drm->dev_private; 370 371 tegra->fbdev = tegra_fbdev_create(drm); 372 if (IS_ERR(tegra->fbdev)) 373 return PTR_ERR(tegra->fbdev); 374 #endif 375 376 return 0; 377 } 378 379 void tegra_drm_fb_free(struct drm_device *drm) 380 { 381 #ifdef CONFIG_DRM_FBDEV_EMULATION 382 struct tegra_drm *tegra = drm->dev_private; 383 384 tegra_fbdev_free(tegra->fbdev); 385 #endif 386 } 387 388 int tegra_drm_fb_init(struct drm_device *drm) 389 { 390 #ifdef CONFIG_DRM_FBDEV_EMULATION 391 struct tegra_drm *tegra = drm->dev_private; 392 int err; 393 394 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc, 395 drm->mode_config.num_connector); 396 if (err < 0) 397 return err; 398 #endif 399 400 return 0; 401 } 402 403 void tegra_drm_fb_exit(struct drm_device *drm) 404 { 405 #ifdef CONFIG_DRM_FBDEV_EMULATION 406 struct tegra_drm *tegra = drm->dev_private; 407 408 tegra_fbdev_exit(tegra->fbdev); 409 #endif 410 } 411