1 /* 2 * Copyright © 2007 David Airlie 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 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * David Airlie 25 */ 26 27 #include <linux/fb.h> 28 #include <linux/pci.h> 29 #include <linux/pm_runtime.h> 30 #include <linux/vga_switcheroo.h> 31 32 #include <drm/drm_crtc_helper.h> 33 #include <drm/drm_drv.h> 34 #include <drm/drm_fb_helper.h> 35 #include <drm/drm_fourcc.h> 36 #include <drm/drm_framebuffer.h> 37 #include <drm/drm_gem_framebuffer_helper.h> 38 39 #include "radeon.h" 40 41 static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj) 42 { 43 struct radeon_bo *rbo = gem_to_radeon_bo(gobj); 44 int ret; 45 46 ret = radeon_bo_reserve(rbo, false); 47 if (likely(ret == 0)) { 48 radeon_bo_kunmap(rbo); 49 radeon_bo_unpin(rbo); 50 radeon_bo_unreserve(rbo); 51 } 52 drm_gem_object_put(gobj); 53 } 54 55 static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper, 56 struct drm_mode_fb_cmd2 *mode_cmd, 57 struct drm_gem_object **gobj_p) 58 { 59 const struct drm_format_info *info; 60 struct radeon_device *rdev = fb_helper->dev->dev_private; 61 struct drm_gem_object *gobj = NULL; 62 struct radeon_bo *rbo = NULL; 63 bool fb_tiled = false; /* useful for testing */ 64 u32 tiling_flags = 0; 65 int ret; 66 int aligned_size, size; 67 int height = mode_cmd->height; 68 u32 cpp; 69 70 info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd); 71 cpp = info->cpp[0]; 72 73 /* need to align pitch with crtc limits */ 74 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp, 75 fb_tiled); 76 77 if (rdev->family >= CHIP_R600) 78 height = ALIGN(mode_cmd->height, 8); 79 size = mode_cmd->pitches[0] * height; 80 aligned_size = ALIGN(size, PAGE_SIZE); 81 ret = radeon_gem_object_create(rdev, aligned_size, 0, 82 RADEON_GEM_DOMAIN_VRAM, 83 0, true, &gobj); 84 if (ret) { 85 pr_err("failed to allocate framebuffer (%d)\n", aligned_size); 86 return -ENOMEM; 87 } 88 rbo = gem_to_radeon_bo(gobj); 89 90 if (fb_tiled) 91 tiling_flags = RADEON_TILING_MACRO; 92 93 #ifdef __BIG_ENDIAN 94 switch (cpp) { 95 case 4: 96 tiling_flags |= RADEON_TILING_SWAP_32BIT; 97 break; 98 case 2: 99 tiling_flags |= RADEON_TILING_SWAP_16BIT; 100 break; 101 default: 102 break; 103 } 104 #endif 105 106 if (tiling_flags) { 107 ret = radeon_bo_set_tiling_flags(rbo, 108 tiling_flags | RADEON_TILING_SURFACE, 109 mode_cmd->pitches[0]); 110 if (ret) 111 dev_err(rdev->dev, "FB failed to set tiling flags\n"); 112 } 113 114 ret = radeon_bo_reserve(rbo, false); 115 if (unlikely(ret != 0)) 116 goto err_radeon_fbdev_destroy_pinned_object; 117 /* Only 27 bit offset for legacy CRTC */ 118 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM, 119 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27, 120 NULL); 121 if (ret) { 122 radeon_bo_unreserve(rbo); 123 goto err_radeon_fbdev_destroy_pinned_object; 124 } 125 if (fb_tiled) 126 radeon_bo_check_tiling(rbo, 0, 0); 127 ret = radeon_bo_kmap(rbo, NULL); 128 radeon_bo_unreserve(rbo); 129 if (ret) 130 goto err_radeon_fbdev_destroy_pinned_object; 131 132 *gobj_p = gobj; 133 return 0; 134 135 err_radeon_fbdev_destroy_pinned_object: 136 radeon_fbdev_destroy_pinned_object(gobj); 137 *gobj_p = NULL; 138 return ret; 139 } 140 141 /* 142 * Fbdev ops and struct fb_ops 143 */ 144 145 static int radeon_fbdev_fb_open(struct fb_info *info, int user) 146 { 147 struct drm_fb_helper *fb_helper = info->par; 148 struct radeon_device *rdev = fb_helper->dev->dev_private; 149 int ret; 150 151 ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev); 152 if (ret < 0 && ret != -EACCES) 153 goto err_pm_runtime_mark_last_busy; 154 155 return 0; 156 157 err_pm_runtime_mark_last_busy: 158 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev); 159 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev); 160 return ret; 161 } 162 163 static int radeon_fbdev_fb_release(struct fb_info *info, int user) 164 { 165 struct drm_fb_helper *fb_helper = info->par; 166 struct radeon_device *rdev = fb_helper->dev->dev_private; 167 168 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev); 169 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev); 170 171 return 0; 172 } 173 174 static void radeon_fbdev_fb_destroy(struct fb_info *info) 175 { 176 struct drm_fb_helper *fb_helper = info->par; 177 struct drm_framebuffer *fb = fb_helper->fb; 178 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0); 179 180 drm_fb_helper_fini(fb_helper); 181 182 drm_framebuffer_unregister_private(fb); 183 drm_framebuffer_cleanup(fb); 184 kfree(fb); 185 radeon_fbdev_destroy_pinned_object(gobj); 186 187 drm_client_release(&fb_helper->client); 188 drm_fb_helper_unprepare(fb_helper); 189 kfree(fb_helper); 190 } 191 192 static const struct fb_ops radeon_fbdev_fb_ops = { 193 .owner = THIS_MODULE, 194 .fb_open = radeon_fbdev_fb_open, 195 .fb_release = radeon_fbdev_fb_release, 196 FB_DEFAULT_IOMEM_OPS, 197 DRM_FB_HELPER_DEFAULT_OPS, 198 .fb_destroy = radeon_fbdev_fb_destroy, 199 }; 200 201 /* 202 * Fbdev helpers and struct drm_fb_helper_funcs 203 */ 204 205 static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper, 206 struct drm_fb_helper_surface_size *sizes) 207 { 208 struct radeon_device *rdev = fb_helper->dev->dev_private; 209 struct drm_mode_fb_cmd2 mode_cmd = { }; 210 struct fb_info *info; 211 struct drm_gem_object *gobj; 212 struct radeon_bo *rbo; 213 struct drm_framebuffer *fb; 214 int ret; 215 unsigned long tmp; 216 217 mode_cmd.width = sizes->surface_width; 218 mode_cmd.height = sizes->surface_height; 219 220 /* avivo can't scanout real 24bpp */ 221 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev)) 222 sizes->surface_bpp = 32; 223 224 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 225 sizes->surface_depth); 226 227 ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj); 228 if (ret) { 229 DRM_ERROR("failed to create fbcon object %d\n", ret); 230 return ret; 231 } 232 rbo = gem_to_radeon_bo(gobj); 233 234 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 235 if (!fb) { 236 ret = -ENOMEM; 237 goto err_radeon_fbdev_destroy_pinned_object; 238 } 239 ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, &mode_cmd, gobj); 240 if (ret) { 241 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 242 goto err_kfree; 243 } 244 245 /* setup helper */ 246 fb_helper->fb = fb; 247 248 /* okay we have an object now allocate the framebuffer */ 249 info = drm_fb_helper_alloc_info(fb_helper); 250 if (IS_ERR(info)) { 251 ret = PTR_ERR(info); 252 goto err_drm_framebuffer_unregister_private; 253 } 254 255 info->fbops = &radeon_fbdev_fb_ops; 256 257 /* radeon resume is fragile and needs a vt switch to help it along */ 258 info->skip_vt_switch = false; 259 260 drm_fb_helper_fill_info(info, fb_helper, sizes); 261 262 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start; 263 info->fix.smem_start = rdev->mc.aper_base + tmp; 264 info->fix.smem_len = radeon_bo_size(rbo); 265 info->screen_base = (__force void __iomem *)rbo->kptr; 266 info->screen_size = radeon_bo_size(rbo); 267 268 memset_io(info->screen_base, 0, info->screen_size); 269 270 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 271 272 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 273 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base); 274 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo)); 275 DRM_INFO("fb depth is %d\n", fb->format->depth); 276 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 277 278 return 0; 279 280 err_drm_framebuffer_unregister_private: 281 fb_helper->fb = NULL; 282 drm_framebuffer_unregister_private(fb); 283 drm_framebuffer_cleanup(fb); 284 err_kfree: 285 kfree(fb); 286 err_radeon_fbdev_destroy_pinned_object: 287 radeon_fbdev_destroy_pinned_object(gobj); 288 return ret; 289 } 290 291 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = { 292 .fb_probe = radeon_fbdev_fb_helper_fb_probe, 293 }; 294 295 /* 296 * Fbdev client and struct drm_client_funcs 297 */ 298 299 static void radeon_fbdev_client_unregister(struct drm_client_dev *client) 300 { 301 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); 302 struct drm_device *dev = fb_helper->dev; 303 struct radeon_device *rdev = dev->dev_private; 304 305 if (fb_helper->info) { 306 vga_switcheroo_client_fb_set(rdev->pdev, NULL); 307 drm_helper_force_disable_all(dev); 308 drm_fb_helper_unregister_info(fb_helper); 309 } else { 310 drm_client_release(&fb_helper->client); 311 drm_fb_helper_unprepare(fb_helper); 312 kfree(fb_helper); 313 } 314 } 315 316 static int radeon_fbdev_client_restore(struct drm_client_dev *client) 317 { 318 drm_fb_helper_lastclose(client->dev); 319 vga_switcheroo_process_delayed_switch(); 320 321 return 0; 322 } 323 324 static int radeon_fbdev_client_hotplug(struct drm_client_dev *client) 325 { 326 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); 327 struct drm_device *dev = client->dev; 328 struct radeon_device *rdev = dev->dev_private; 329 int ret; 330 331 if (dev->fb_helper) 332 return drm_fb_helper_hotplug_event(dev->fb_helper); 333 334 ret = drm_fb_helper_init(dev, fb_helper); 335 if (ret) 336 goto err_drm_err; 337 338 if (!drm_drv_uses_atomic_modeset(dev)) 339 drm_helper_disable_unused_functions(dev); 340 341 ret = drm_fb_helper_initial_config(fb_helper); 342 if (ret) 343 goto err_drm_fb_helper_fini; 344 345 vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info); 346 347 return 0; 348 349 err_drm_fb_helper_fini: 350 drm_fb_helper_fini(fb_helper); 351 err_drm_err: 352 drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret); 353 return ret; 354 } 355 356 static const struct drm_client_funcs radeon_fbdev_client_funcs = { 357 .owner = THIS_MODULE, 358 .unregister = radeon_fbdev_client_unregister, 359 .restore = radeon_fbdev_client_restore, 360 .hotplug = radeon_fbdev_client_hotplug, 361 }; 362 363 void radeon_fbdev_setup(struct radeon_device *rdev) 364 { 365 struct drm_fb_helper *fb_helper; 366 int bpp_sel = 32; 367 int ret; 368 369 if (rdev->mc.real_vram_size <= (8 * 1024 * 1024)) 370 bpp_sel = 8; 371 else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024)) 372 bpp_sel = 16; 373 374 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL); 375 if (!fb_helper) 376 return; 377 drm_fb_helper_prepare(rdev_to_drm(rdev), fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs); 378 379 ret = drm_client_init(rdev_to_drm(rdev), &fb_helper->client, "radeon-fbdev", 380 &radeon_fbdev_client_funcs); 381 if (ret) { 382 drm_err(rdev_to_drm(rdev), "Failed to register client: %d\n", ret); 383 goto err_drm_client_init; 384 } 385 386 drm_client_register(&fb_helper->client); 387 388 return; 389 390 err_drm_client_init: 391 drm_fb_helper_unprepare(fb_helper); 392 kfree(fb_helper); 393 } 394 395 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state) 396 { 397 if (rdev_to_drm(rdev)->fb_helper) 398 drm_fb_helper_set_suspend(rdev_to_drm(rdev)->fb_helper, state); 399 } 400 401 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj) 402 { 403 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper; 404 struct drm_gem_object *gobj; 405 406 if (!fb_helper) 407 return false; 408 409 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0); 410 if (!gobj) 411 return false; 412 if (gobj != &robj->tbo.base) 413 return false; 414 415 return true; 416 } 417