1 /* $NetBSD: amdgpu_fb.c,v 1.5 2020/02/14 04:37:09 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 1.5 2020/02/14 04:37:09 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 #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_ia(adev->ddev->dev, "amdgpufbbus", &afa, 238 NULL); 239 if (helper->fbdev == NULL) { 240 DRM_ERROR("failed to attach amdgpufb\n"); 241 goto out_unref; 242 } 243 } 244 fb = &rfbdev->rfb.base; 245 rfbdev->helper.fb = fb; 246 #else /* __NetBSD__ */ 247 /* okay we have an object now allocate the framebuffer */ 248 info = drm_fb_helper_alloc_fbi(helper); 249 if (IS_ERR(info)) { 250 ret = PTR_ERR(info); 251 goto out_unref; 252 } 253 254 info->par = rfbdev; 255 info->skip_vt_switch = true; 256 257 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj); 258 if (ret) { 259 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 260 goto out_destroy_fbi; 261 } 262 263 fb = &rfbdev->rfb.base; 264 265 /* setup helper */ 266 rfbdev->helper.fb = fb; 267 268 memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo)); 269 270 strcpy(info->fix.id, "amdgpudrmfb"); 271 272 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 273 274 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 275 info->fbops = &amdgpufb_ops; 276 277 tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start; 278 info->fix.smem_start = adev->mc.aper_base + tmp; 279 info->fix.smem_len = amdgpu_bo_size(rbo); 280 info->screen_base = rbo->kptr; 281 info->screen_size = amdgpu_bo_size(rbo); 282 283 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height); 284 285 /* setup aperture base/size for vesafb takeover */ 286 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base; 287 info->apertures->ranges[0].size = adev->mc.aper_size; 288 289 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 290 291 if (info->screen_base == NULL) { 292 ret = -ENOSPC; 293 goto out_destroy_fbi; 294 } 295 296 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 297 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->mc.aper_base); 298 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo)); 299 DRM_INFO("fb depth is %d\n", fb->depth); 300 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 301 302 vga_switcheroo_client_fb_set(adev->ddev->pdev, info); 303 #endif 304 return 0; 305 306 #ifndef __NetBSD__ 307 out_destroy_fbi: 308 drm_fb_helper_release_fbi(helper); 309 #endif 310 out_unref: 311 if (rbo) { 312 313 } 314 if (fb && ret) { 315 drm_gem_object_unreference(gobj); 316 drm_framebuffer_unregister_private(fb); 317 drm_framebuffer_cleanup(fb); 318 kfree(fb); 319 } 320 return ret; 321 } 322 323 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev) 324 { 325 if (adev->mode_info.rfbdev) 326 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper); 327 } 328 329 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev) 330 { 331 struct amdgpu_framebuffer *rfb = &rfbdev->rfb; 332 #ifdef __NetBSD__ 333 int ret; 334 #endif 335 336 #ifdef __NetBSD__ 337 /* XXX errno NetBSD->Linux */ 338 ret = -config_detach(rfbdev->helper.fbdev, DETACH_FORCE); 339 if (ret) { 340 DRM_ERROR("failed to detach amdgpufb: %d\n", ret); 341 return ret; 342 } 343 rfbdev->helper.fbdev = NULL; 344 #else 345 drm_fb_helper_unregister_fbi(&rfbdev->helper); 346 drm_fb_helper_release_fbi(&rfbdev->helper); 347 #endif 348 349 if (rfb->obj) { 350 amdgpufb_destroy_pinned_object(rfb->obj); 351 rfb->obj = NULL; 352 } 353 drm_fb_helper_fini(&rfbdev->helper); 354 drm_framebuffer_unregister_private(&rfb->base); 355 drm_framebuffer_cleanup(&rfb->base); 356 357 return 0; 358 } 359 360 /** Sets the color ramps on behalf of fbcon */ 361 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 362 u16 blue, int regno) 363 { 364 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 365 366 amdgpu_crtc->lut_r[regno] = red >> 6; 367 amdgpu_crtc->lut_g[regno] = green >> 6; 368 amdgpu_crtc->lut_b[regno] = blue >> 6; 369 } 370 371 /** Gets the color ramps on behalf of fbcon */ 372 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 373 u16 *blue, int regno) 374 { 375 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 376 377 *red = amdgpu_crtc->lut_r[regno] << 6; 378 *green = amdgpu_crtc->lut_g[regno] << 6; 379 *blue = amdgpu_crtc->lut_b[regno] << 6; 380 } 381 382 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = { 383 .gamma_set = amdgpu_crtc_fb_gamma_set, 384 .gamma_get = amdgpu_crtc_fb_gamma_get, 385 .fb_probe = amdgpufb_create, 386 }; 387 388 int amdgpu_fbdev_init(struct amdgpu_device *adev) 389 { 390 struct amdgpu_fbdev *rfbdev; 391 int bpp_sel = 32; 392 int ret; 393 394 /* don't init fbdev on hw without DCE */ 395 if (!adev->mode_info.mode_config_initialized) 396 return 0; 397 398 /* select 8 bpp console on low vram cards */ 399 if (adev->mc.real_vram_size <= (32*1024*1024)) 400 bpp_sel = 8; 401 402 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL); 403 if (!rfbdev) 404 return -ENOMEM; 405 406 rfbdev->adev = adev; 407 adev->mode_info.rfbdev = rfbdev; 408 409 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper, 410 &amdgpu_fb_helper_funcs); 411 412 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper, 413 adev->mode_info.num_crtc, 414 AMDGPUFB_CONN_LIMIT); 415 if (ret) { 416 kfree(rfbdev); 417 return ret; 418 } 419 420 drm_fb_helper_single_add_all_connectors(&rfbdev->helper); 421 422 /* disable all the possible outputs/crtcs before entering KMS mode */ 423 drm_helper_disable_unused_functions(adev->ddev); 424 425 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel); 426 return 0; 427 } 428 429 void amdgpu_fbdev_fini(struct amdgpu_device *adev) 430 { 431 if (!adev->mode_info.rfbdev) 432 return; 433 434 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev); 435 kfree(adev->mode_info.rfbdev); 436 adev->mode_info.rfbdev = NULL; 437 } 438 439 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state) 440 { 441 if (adev->mode_info.rfbdev) 442 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper, 443 state); 444 } 445 446 int amdgpu_fbdev_total_size(struct amdgpu_device *adev) 447 { 448 struct amdgpu_bo *robj; 449 int size = 0; 450 451 if (!adev->mode_info.rfbdev) 452 return 0; 453 454 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj); 455 size += amdgpu_bo_size(robj); 456 return size; 457 } 458 459 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj) 460 { 461 if (!adev->mode_info.rfbdev) 462 return false; 463 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj)) 464 return true; 465 return false; 466 } 467 468 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev) 469 { 470 struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev; 471 struct drm_fb_helper *fb_helper; 472 int ret; 473 474 if (!afbdev) 475 return; 476 477 fb_helper = &afbdev->helper; 478 479 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); 480 if (ret) 481 DRM_DEBUG("failed to restore crtc mode\n"); 482 } 483