1 /* $NetBSD: amdgpu_fb.c,v 1.3 2018/08/27 14:04:50 riastradh Exp $ */ 2 3 /* 4 * Copyright © 2007 David Airlie 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * David Airlie 27 */ 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_fb.c,v 1.3 2018/08/27 14:04:50 riastradh Exp $"); 30 31 #include <linux/module.h> 32 #include <linux/slab.h> 33 #include <linux/fb.h> 34 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_crtc_helper.h> 38 #include <drm/amdgpu_drm.h> 39 #include "amdgpu.h" 40 #include "cikd.h" 41 42 #include <drm/drm_fb_helper.h> 43 44 #include <linux/vga_switcheroo.h> 45 46 #ifdef __NetBSD__ 47 #include "amdgpufb.h" 48 #endif 49 50 /* object hierarchy - 51 this contains a helper + a amdgpu fb 52 the helper contains a pointer to amdgpu framebuffer baseclass. 53 */ 54 struct amdgpu_fbdev { 55 struct drm_fb_helper helper; 56 struct amdgpu_framebuffer rfb; 57 struct list_head fbdev_list; 58 struct amdgpu_device *adev; 59 }; 60 61 #ifndef __NetBSD__ 62 static struct fb_ops amdgpufb_ops = { 63 .owner = THIS_MODULE, 64 .fb_check_var = drm_fb_helper_check_var, 65 .fb_set_par = drm_fb_helper_set_par, 66 .fb_fillrect = drm_fb_helper_cfb_fillrect, 67 .fb_copyarea = drm_fb_helper_cfb_copyarea, 68 .fb_imageblit = drm_fb_helper_cfb_imageblit, 69 .fb_pan_display = drm_fb_helper_pan_display, 70 .fb_blank = drm_fb_helper_blank, 71 .fb_setcmap = drm_fb_helper_setcmap, 72 .fb_debug_enter = drm_fb_helper_debug_enter, 73 .fb_debug_leave = drm_fb_helper_debug_leave, 74 }; 75 #endif 76 77 78 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled) 79 { 80 int aligned = width; 81 int pitch_mask = 0; 82 83 switch (bpp / 8) { 84 case 1: 85 pitch_mask = 255; 86 break; 87 case 2: 88 pitch_mask = 127; 89 break; 90 case 3: 91 case 4: 92 pitch_mask = 63; 93 break; 94 } 95 96 aligned += pitch_mask; 97 aligned &= ~pitch_mask; 98 return aligned; 99 } 100 101 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj) 102 { 103 struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj); 104 int ret; 105 106 ret = amdgpu_bo_reserve(rbo, false); 107 if (likely(ret == 0)) { 108 amdgpu_bo_kunmap(rbo); 109 amdgpu_bo_unpin(rbo); 110 amdgpu_bo_unreserve(rbo); 111 } 112 drm_gem_object_unreference_unlocked(gobj); 113 } 114 115 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev, 116 struct drm_mode_fb_cmd2 *mode_cmd, 117 struct drm_gem_object **gobj_p) 118 { 119 struct amdgpu_device *adev = rfbdev->adev; 120 struct drm_gem_object *gobj = NULL; 121 struct amdgpu_bo *rbo = NULL; 122 bool fb_tiled = false; /* useful for testing */ 123 u32 tiling_flags = 0; 124 int ret; 125 int aligned_size, size; 126 int height = mode_cmd->height; 127 u32 bpp, depth; 128 129 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); 130 131 /* need to align pitch with crtc limits */ 132 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp, 133 fb_tiled) * ((bpp + 1) / 8); 134 135 #ifdef __NetBSD__ /* XXX ALIGN means something else. */ 136 height = round_up(mode_cmd->height, 8); 137 #else 138 height = ALIGN(mode_cmd->height, 8); 139 #endif 140 size = mode_cmd->pitches[0] * height; 141 #ifdef __NetBSD__ /* XXX ALIGN means something else. */ 142 aligned_size = round_up(size, PAGE_SIZE); 143 #else 144 aligned_size = ALIGN(size, PAGE_SIZE); 145 #endif 146 ret = amdgpu_gem_object_create(adev, aligned_size, 0, 147 AMDGPU_GEM_DOMAIN_VRAM, 148 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED, 149 true, &gobj); 150 if (ret) { 151 printk(KERN_ERR "failed to allocate framebuffer (%d)\n", 152 aligned_size); 153 return -ENOMEM; 154 } 155 rbo = gem_to_amdgpu_bo(gobj); 156 157 if (fb_tiled) 158 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1); 159 160 ret = amdgpu_bo_reserve(rbo, false); 161 if (unlikely(ret != 0)) 162 goto out_unref; 163 164 if (tiling_flags) { 165 ret = amdgpu_bo_set_tiling_flags(rbo, 166 tiling_flags); 167 if (ret) 168 dev_err(adev->dev, "FB failed to set tiling flags\n"); 169 } 170 171 172 ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL); 173 if (ret) { 174 amdgpu_bo_unreserve(rbo); 175 goto out_unref; 176 } 177 ret = amdgpu_bo_kmap(rbo, NULL); 178 amdgpu_bo_unreserve(rbo); 179 if (ret) { 180 goto out_unref; 181 } 182 183 *gobj_p = gobj; 184 return 0; 185 out_unref: 186 amdgpufb_destroy_pinned_object(gobj); 187 *gobj_p = NULL; 188 return ret; 189 } 190 191 static int amdgpufb_create(struct drm_fb_helper *helper, 192 struct drm_fb_helper_surface_size *sizes) 193 { 194 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper; 195 struct amdgpu_device *adev = rfbdev->adev; 196 #ifndef __NetBSD__ 197 struct fb_info *info; 198 #endif 199 struct drm_framebuffer *fb = NULL; 200 struct drm_mode_fb_cmd2 mode_cmd; 201 struct drm_gem_object *gobj = NULL; 202 struct amdgpu_bo *rbo = NULL; 203 int ret; 204 #ifndef __NetBSD__ 205 unsigned long tmp; 206 #endif 207 208 mode_cmd.width = sizes->surface_width; 209 mode_cmd.height = sizes->surface_height; 210 211 if (sizes->surface_bpp == 24) 212 sizes->surface_bpp = 32; 213 214 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 215 sizes->surface_depth); 216 217 ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj); 218 if (ret) { 219 DRM_ERROR("failed to create fbcon object %d\n", ret); 220 return ret; 221 } 222 223 rbo = gem_to_amdgpu_bo(gobj); 224 225 #ifdef __NetBSD__ 226 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj); 227 if (ret) { 228 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 229 goto out_unref; 230 } 231 232 (void)memset(rbo->kptr, 0, amdgpu_bo_size(rbo)); 233 234 { 235 static const struct amdgpufb_attach_args zero_afa; 236 struct amdgpufb_attach_args afa = zero_afa; 237 238 afa.afa_fb_helper = helper; 239 afa.afa_fb_sizes = *sizes; 240 afa.afa_fb_ptr = rbo->kptr; 241 afa.afa_fb_linebytes = mode_cmd.pitches[0]; 242 243 helper->fbdev = config_found_ia(adev->ddev->dev, "amdgpufbbus", &afa, 244 NULL); 245 if (helper->fbdev == NULL) { 246 DRM_ERROR("failed to attach amdgpufb\n"); 247 goto out_unref; 248 } 249 } 250 fb = &rfbdev->rfb.base; 251 rfbdev->helper.fb = fb; 252 #else /* __NetBSD__ */ 253 /* okay we have an object now allocate the framebuffer */ 254 info = drm_fb_helper_alloc_fbi(helper); 255 if (IS_ERR(info)) { 256 ret = PTR_ERR(info); 257 goto out_unref; 258 } 259 260 info->par = rfbdev; 261 info->skip_vt_switch = true; 262 263 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj); 264 if (ret) { 265 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 266 goto out_destroy_fbi; 267 } 268 269 fb = &rfbdev->rfb.base; 270 271 /* setup helper */ 272 rfbdev->helper.fb = fb; 273 274 memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo)); 275 276 strcpy(info->fix.id, "amdgpudrmfb"); 277 278 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 279 280 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 281 info->fbops = &amdgpufb_ops; 282 283 tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start; 284 info->fix.smem_start = adev->mc.aper_base + tmp; 285 info->fix.smem_len = amdgpu_bo_size(rbo); 286 info->screen_base = rbo->kptr; 287 info->screen_size = amdgpu_bo_size(rbo); 288 289 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height); 290 291 /* setup aperture base/size for vesafb takeover */ 292 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base; 293 info->apertures->ranges[0].size = adev->mc.aper_size; 294 295 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 296 297 if (info->screen_base == NULL) { 298 ret = -ENOSPC; 299 goto out_destroy_fbi; 300 } 301 302 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 303 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->mc.aper_base); 304 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo)); 305 DRM_INFO("fb depth is %d\n", fb->depth); 306 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 307 308 vga_switcheroo_client_fb_set(adev->ddev->pdev, info); 309 #endif 310 return 0; 311 312 #ifndef __NetBSD__ 313 out_destroy_fbi: 314 drm_fb_helper_release_fbi(helper); 315 #endif 316 out_unref: 317 if (rbo) { 318 319 } 320 if (fb && ret) { 321 drm_gem_object_unreference(gobj); 322 drm_framebuffer_unregister_private(fb); 323 drm_framebuffer_cleanup(fb); 324 kfree(fb); 325 } 326 return ret; 327 } 328 329 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev) 330 { 331 if (adev->mode_info.rfbdev) 332 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper); 333 } 334 335 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev) 336 { 337 struct amdgpu_framebuffer *rfb = &rfbdev->rfb; 338 #ifdef __NetBSD__ 339 int ret; 340 #endif 341 342 #ifdef __NetBSD__ 343 /* XXX errno NetBSD->Linux */ 344 ret = -config_detach(rfbdev->helper.fbdev, DETACH_FORCE); 345 if (ret) { 346 DRM_ERROR("failed to detach amdgpufb: %d\n", ret); 347 return ret; 348 } 349 rfbdev->helper.fbdev = NULL; 350 #else 351 drm_fb_helper_unregister_fbi(&rfbdev->helper); 352 drm_fb_helper_release_fbi(&rfbdev->helper); 353 #endif 354 355 if (rfb->obj) { 356 amdgpufb_destroy_pinned_object(rfb->obj); 357 rfb->obj = NULL; 358 } 359 drm_fb_helper_fini(&rfbdev->helper); 360 drm_framebuffer_unregister_private(&rfb->base); 361 drm_framebuffer_cleanup(&rfb->base); 362 363 return 0; 364 } 365 366 /** Sets the color ramps on behalf of fbcon */ 367 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 368 u16 blue, int regno) 369 { 370 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 371 372 amdgpu_crtc->lut_r[regno] = red >> 6; 373 amdgpu_crtc->lut_g[regno] = green >> 6; 374 amdgpu_crtc->lut_b[regno] = blue >> 6; 375 } 376 377 /** Gets the color ramps on behalf of fbcon */ 378 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 379 u16 *blue, int regno) 380 { 381 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 382 383 *red = amdgpu_crtc->lut_r[regno] << 6; 384 *green = amdgpu_crtc->lut_g[regno] << 6; 385 *blue = amdgpu_crtc->lut_b[regno] << 6; 386 } 387 388 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = { 389 .gamma_set = amdgpu_crtc_fb_gamma_set, 390 .gamma_get = amdgpu_crtc_fb_gamma_get, 391 .fb_probe = amdgpufb_create, 392 }; 393 394 int amdgpu_fbdev_init(struct amdgpu_device *adev) 395 { 396 struct amdgpu_fbdev *rfbdev; 397 int bpp_sel = 32; 398 int ret; 399 400 /* don't init fbdev on hw without DCE */ 401 if (!adev->mode_info.mode_config_initialized) 402 return 0; 403 404 /* select 8 bpp console on low vram cards */ 405 if (adev->mc.real_vram_size <= (32*1024*1024)) 406 bpp_sel = 8; 407 408 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL); 409 if (!rfbdev) 410 return -ENOMEM; 411 412 rfbdev->adev = adev; 413 adev->mode_info.rfbdev = rfbdev; 414 415 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper, 416 &amdgpu_fb_helper_funcs); 417 418 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper, 419 adev->mode_info.num_crtc, 420 AMDGPUFB_CONN_LIMIT); 421 if (ret) { 422 kfree(rfbdev); 423 return ret; 424 } 425 426 drm_fb_helper_single_add_all_connectors(&rfbdev->helper); 427 428 /* disable all the possible outputs/crtcs before entering KMS mode */ 429 drm_helper_disable_unused_functions(adev->ddev); 430 431 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel); 432 return 0; 433 } 434 435 void amdgpu_fbdev_fini(struct amdgpu_device *adev) 436 { 437 if (!adev->mode_info.rfbdev) 438 return; 439 440 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev); 441 kfree(adev->mode_info.rfbdev); 442 adev->mode_info.rfbdev = NULL; 443 } 444 445 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state) 446 { 447 #ifndef __NetBSD__ /* XXX amdgpu fb suspend */ 448 if (adev->mode_info.rfbdev) 449 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper, 450 state); 451 #endif 452 } 453 454 int amdgpu_fbdev_total_size(struct amdgpu_device *adev) 455 { 456 struct amdgpu_bo *robj; 457 int size = 0; 458 459 if (!adev->mode_info.rfbdev) 460 return 0; 461 462 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj); 463 size += amdgpu_bo_size(robj); 464 return size; 465 } 466 467 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj) 468 { 469 if (!adev->mode_info.rfbdev) 470 return false; 471 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj)) 472 return true; 473 return false; 474 } 475 476 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev) 477 { 478 struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev; 479 struct drm_fb_helper *fb_helper; 480 int ret; 481 482 if (!afbdev) 483 return; 484 485 fb_helper = &afbdev->helper; 486 487 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); 488 if (ret) 489 DRM_DEBUG("failed to restore crtc mode\n"); 490 } 491