1 /* $NetBSD: amdgpu_fb.c,v 1.6 2021/04/24 23:37:00 thorpej 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 1.6 2021/04/24 23:37:00 thorpej 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 #include <linux/nbsd-namespace.h> 51 52 /* object hierarchy - 53 this contains a helper + a amdgpu fb 54 the helper contains a pointer to amdgpu framebuffer baseclass. 55 */ 56 struct amdgpu_fbdev { 57 struct drm_fb_helper helper; 58 struct amdgpu_framebuffer rfb; 59 struct list_head fbdev_list; 60 struct amdgpu_device *adev; 61 }; 62 63 #ifndef __NetBSD__ 64 static struct fb_ops amdgpufb_ops = { 65 .owner = THIS_MODULE, 66 .fb_check_var = drm_fb_helper_check_var, 67 .fb_set_par = drm_fb_helper_set_par, 68 .fb_fillrect = drm_fb_helper_cfb_fillrect, 69 .fb_copyarea = drm_fb_helper_cfb_copyarea, 70 .fb_imageblit = drm_fb_helper_cfb_imageblit, 71 .fb_pan_display = drm_fb_helper_pan_display, 72 .fb_blank = drm_fb_helper_blank, 73 .fb_setcmap = drm_fb_helper_setcmap, 74 .fb_debug_enter = drm_fb_helper_debug_enter, 75 .fb_debug_leave = drm_fb_helper_debug_leave, 76 }; 77 #endif 78 79 80 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled) 81 { 82 int aligned = width; 83 int pitch_mask = 0; 84 85 switch (bpp / 8) { 86 case 1: 87 pitch_mask = 255; 88 break; 89 case 2: 90 pitch_mask = 127; 91 break; 92 case 3: 93 case 4: 94 pitch_mask = 63; 95 break; 96 } 97 98 aligned += pitch_mask; 99 aligned &= ~pitch_mask; 100 return aligned; 101 } 102 103 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj) 104 { 105 struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj); 106 int ret; 107 108 ret = amdgpu_bo_reserve(rbo, false); 109 if (likely(ret == 0)) { 110 amdgpu_bo_kunmap(rbo); 111 amdgpu_bo_unpin(rbo); 112 amdgpu_bo_unreserve(rbo); 113 } 114 drm_gem_object_unreference_unlocked(gobj); 115 } 116 117 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev, 118 struct drm_mode_fb_cmd2 *mode_cmd, 119 struct drm_gem_object **gobj_p) 120 { 121 struct amdgpu_device *adev = rfbdev->adev; 122 struct drm_gem_object *gobj = NULL; 123 struct amdgpu_bo *rbo = NULL; 124 bool fb_tiled = false; /* useful for testing */ 125 u32 tiling_flags = 0; 126 int ret; 127 int aligned_size, size; 128 int height = mode_cmd->height; 129 u32 bpp, depth; 130 131 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); 132 133 /* need to align pitch with crtc limits */ 134 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp, 135 fb_tiled) * ((bpp + 1) / 8); 136 137 height = ALIGN(mode_cmd->height, 8); 138 size = mode_cmd->pitches[0] * height; 139 aligned_size = ALIGN(size, PAGE_SIZE); 140 ret = amdgpu_gem_object_create(adev, aligned_size, 0, 141 AMDGPU_GEM_DOMAIN_VRAM, 142 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED, 143 true, &gobj); 144 if (ret) { 145 printk(KERN_ERR "failed to allocate framebuffer (%d)\n", 146 aligned_size); 147 return -ENOMEM; 148 } 149 rbo = gem_to_amdgpu_bo(gobj); 150 151 if (fb_tiled) 152 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1); 153 154 ret = amdgpu_bo_reserve(rbo, false); 155 if (unlikely(ret != 0)) 156 goto out_unref; 157 158 if (tiling_flags) { 159 ret = amdgpu_bo_set_tiling_flags(rbo, 160 tiling_flags); 161 if (ret) 162 dev_err(adev->dev, "FB failed to set tiling flags\n"); 163 } 164 165 166 ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL); 167 if (ret) { 168 amdgpu_bo_unreserve(rbo); 169 goto out_unref; 170 } 171 ret = amdgpu_bo_kmap(rbo, NULL); 172 amdgpu_bo_unreserve(rbo); 173 if (ret) { 174 goto out_unref; 175 } 176 177 *gobj_p = gobj; 178 return 0; 179 out_unref: 180 amdgpufb_destroy_pinned_object(gobj); 181 *gobj_p = NULL; 182 return ret; 183 } 184 185 static int amdgpufb_create(struct drm_fb_helper *helper, 186 struct drm_fb_helper_surface_size *sizes) 187 { 188 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper; 189 struct amdgpu_device *adev = rfbdev->adev; 190 #ifndef __NetBSD__ 191 struct fb_info *info; 192 #endif 193 struct drm_framebuffer *fb = NULL; 194 struct drm_mode_fb_cmd2 mode_cmd; 195 struct drm_gem_object *gobj = NULL; 196 struct amdgpu_bo *rbo = NULL; 197 int ret; 198 #ifndef __NetBSD__ 199 unsigned long tmp; 200 #endif 201 202 mode_cmd.width = sizes->surface_width; 203 mode_cmd.height = sizes->surface_height; 204 205 if (sizes->surface_bpp == 24) 206 sizes->surface_bpp = 32; 207 208 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 209 sizes->surface_depth); 210 211 ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj); 212 if (ret) { 213 DRM_ERROR("failed to create fbcon object %d\n", ret); 214 return ret; 215 } 216 217 rbo = gem_to_amdgpu_bo(gobj); 218 219 #ifdef __NetBSD__ 220 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj); 221 if (ret) { 222 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 223 goto out_unref; 224 } 225 226 (void)memset(rbo->kptr, 0, amdgpu_bo_size(rbo)); 227 228 { 229 static const struct amdgpufb_attach_args zero_afa; 230 struct amdgpufb_attach_args afa = zero_afa; 231 232 afa.afa_fb_helper = helper; 233 afa.afa_fb_sizes = *sizes; 234 afa.afa_fb_ptr = rbo->kptr; 235 afa.afa_fb_linebytes = mode_cmd.pitches[0]; 236 237 helper->fbdev = config_found(adev->ddev->dev, &afa, NULL, 238 CFARG_IATTR, "amdgpufbbus", 239 CFARG_EOL); 240 if (helper->fbdev == NULL) { 241 DRM_ERROR("failed to attach amdgpufb\n"); 242 goto out_unref; 243 } 244 } 245 fb = &rfbdev->rfb.base; 246 rfbdev->helper.fb = fb; 247 #else /* __NetBSD__ */ 248 /* okay we have an object now allocate the framebuffer */ 249 info = drm_fb_helper_alloc_fbi(helper); 250 if (IS_ERR(info)) { 251 ret = PTR_ERR(info); 252 goto out_unref; 253 } 254 255 info->par = rfbdev; 256 info->skip_vt_switch = true; 257 258 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj); 259 if (ret) { 260 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 261 goto out_destroy_fbi; 262 } 263 264 fb = &rfbdev->rfb.base; 265 266 /* setup helper */ 267 rfbdev->helper.fb = fb; 268 269 memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo)); 270 271 strcpy(info->fix.id, "amdgpudrmfb"); 272 273 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 274 275 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 276 info->fbops = &amdgpufb_ops; 277 278 tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start; 279 info->fix.smem_start = adev->mc.aper_base + tmp; 280 info->fix.smem_len = amdgpu_bo_size(rbo); 281 info->screen_base = rbo->kptr; 282 info->screen_size = amdgpu_bo_size(rbo); 283 284 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height); 285 286 /* setup aperture base/size for vesafb takeover */ 287 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base; 288 info->apertures->ranges[0].size = adev->mc.aper_size; 289 290 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 291 292 if (info->screen_base == NULL) { 293 ret = -ENOSPC; 294 goto out_destroy_fbi; 295 } 296 297 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 298 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->mc.aper_base); 299 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo)); 300 DRM_INFO("fb depth is %d\n", fb->depth); 301 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 302 303 vga_switcheroo_client_fb_set(adev->ddev->pdev, info); 304 #endif 305 return 0; 306 307 #ifndef __NetBSD__ 308 out_destroy_fbi: 309 drm_fb_helper_release_fbi(helper); 310 #endif 311 out_unref: 312 if (rbo) { 313 314 } 315 if (fb && ret) { 316 drm_gem_object_unreference(gobj); 317 drm_framebuffer_unregister_private(fb); 318 drm_framebuffer_cleanup(fb); 319 kfree(fb); 320 } 321 return ret; 322 } 323 324 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev) 325 { 326 if (adev->mode_info.rfbdev) 327 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper); 328 } 329 330 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev) 331 { 332 struct amdgpu_framebuffer *rfb = &rfbdev->rfb; 333 #ifdef __NetBSD__ 334 int ret; 335 #endif 336 337 #ifdef __NetBSD__ 338 /* XXX errno NetBSD->Linux */ 339 ret = -config_detach(rfbdev->helper.fbdev, DETACH_FORCE); 340 if (ret) { 341 DRM_ERROR("failed to detach amdgpufb: %d\n", ret); 342 return ret; 343 } 344 rfbdev->helper.fbdev = NULL; 345 #else 346 drm_fb_helper_unregister_fbi(&rfbdev->helper); 347 drm_fb_helper_release_fbi(&rfbdev->helper); 348 #endif 349 350 if (rfb->obj) { 351 amdgpufb_destroy_pinned_object(rfb->obj); 352 rfb->obj = NULL; 353 } 354 drm_fb_helper_fini(&rfbdev->helper); 355 drm_framebuffer_unregister_private(&rfb->base); 356 drm_framebuffer_cleanup(&rfb->base); 357 358 return 0; 359 } 360 361 /** Sets the color ramps on behalf of fbcon */ 362 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 363 u16 blue, int regno) 364 { 365 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 366 367 amdgpu_crtc->lut_r[regno] = red >> 6; 368 amdgpu_crtc->lut_g[regno] = green >> 6; 369 amdgpu_crtc->lut_b[regno] = blue >> 6; 370 } 371 372 /** Gets the color ramps on behalf of fbcon */ 373 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 374 u16 *blue, int regno) 375 { 376 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 377 378 *red = amdgpu_crtc->lut_r[regno] << 6; 379 *green = amdgpu_crtc->lut_g[regno] << 6; 380 *blue = amdgpu_crtc->lut_b[regno] << 6; 381 } 382 383 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = { 384 .gamma_set = amdgpu_crtc_fb_gamma_set, 385 .gamma_get = amdgpu_crtc_fb_gamma_get, 386 .fb_probe = amdgpufb_create, 387 }; 388 389 int amdgpu_fbdev_init(struct amdgpu_device *adev) 390 { 391 struct amdgpu_fbdev *rfbdev; 392 int bpp_sel = 32; 393 int ret; 394 395 /* don't init fbdev on hw without DCE */ 396 if (!adev->mode_info.mode_config_initialized) 397 return 0; 398 399 /* select 8 bpp console on low vram cards */ 400 if (adev->mc.real_vram_size <= (32*1024*1024)) 401 bpp_sel = 8; 402 403 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL); 404 if (!rfbdev) 405 return -ENOMEM; 406 407 rfbdev->adev = adev; 408 adev->mode_info.rfbdev = rfbdev; 409 410 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper, 411 &amdgpu_fb_helper_funcs); 412 413 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper, 414 adev->mode_info.num_crtc, 415 AMDGPUFB_CONN_LIMIT); 416 if (ret) { 417 kfree(rfbdev); 418 return ret; 419 } 420 421 drm_fb_helper_single_add_all_connectors(&rfbdev->helper); 422 423 /* disable all the possible outputs/crtcs before entering KMS mode */ 424 drm_helper_disable_unused_functions(adev->ddev); 425 426 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel); 427 return 0; 428 } 429 430 void amdgpu_fbdev_fini(struct amdgpu_device *adev) 431 { 432 if (!adev->mode_info.rfbdev) 433 return; 434 435 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev); 436 kfree(adev->mode_info.rfbdev); 437 adev->mode_info.rfbdev = NULL; 438 } 439 440 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state) 441 { 442 if (adev->mode_info.rfbdev) 443 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper, 444 state); 445 } 446 447 int amdgpu_fbdev_total_size(struct amdgpu_device *adev) 448 { 449 struct amdgpu_bo *robj; 450 int size = 0; 451 452 if (!adev->mode_info.rfbdev) 453 return 0; 454 455 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj); 456 size += amdgpu_bo_size(robj); 457 return size; 458 } 459 460 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj) 461 { 462 if (!adev->mode_info.rfbdev) 463 return false; 464 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj)) 465 return true; 466 return false; 467 } 468 469 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev) 470 { 471 struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev; 472 struct drm_fb_helper *fb_helper; 473 int ret; 474 475 if (!afbdev) 476 return; 477 478 fb_helper = &afbdev->helper; 479 480 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); 481 if (ret) 482 DRM_DEBUG("failed to restore crtc mode\n"); 483 } 484