drivers/gpu/drm/nouveau/nouveau_fbcon.c

   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/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/errno.h>
  30 #include <linux/string.h>
  31 #include <linux/mm.h>
  32 #include <linux/tty.h>
  33 #include <linux/sysrq.h>
  34 #include <linux/delay.h>
  35 #include <linux/fb.h>
  36 #include <linux/init.h>
  37 #include <linux/screen_info.h>
  38 #include <linux/vga_switcheroo.h>
  39 #include <linux/console.h>
  40
  41 #include <drm/drmP.h>
  42 #include <drm/drm_crtc.h>
  43 #include <drm/drm_crtc_helper.h>
  44 #include <drm/drm_fb_helper.h>
  45
  46 #include "nouveau_drm.h"
  47 #include "nouveau_gem.h"
  48 #include "nouveau_bo.h"
  49 #include "nouveau_fbcon.h"
  50 #include "nouveau_chan.h"
  51
  52 #include "nouveau_crtc.h"
  53
  54 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
  55 static int nouveau_nofbaccel = 0;
  56 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
  57
  58 static void
  59 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
  60 {
  61         struct nouveau_fbdev *fbcon = info->par;
  62         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
  63         struct nvif_device *device = &drm->device;
  64         int ret;
  65
  66         if (info->state != FBINFO_STATE_RUNNING)
  67                 return;
  68
  69         ret = -ENODEV;
  70         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
  71             mutex_trylock(&drm->client.mutex)) {
  72                 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
  73                         ret = nv04_fbcon_fillrect(info, rect);
  74                 else
  75                 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
  76                         ret = nv50_fbcon_fillrect(info, rect);
  77                 else
  78                         ret = nvc0_fbcon_fillrect(info, rect);
  79                 mutex_unlock(&drm->client.mutex);
  80         }
  81
  82         if (ret == 0)
  83                 return;
  84
  85         if (ret != -ENODEV)
  86                 nouveau_fbcon_gpu_lockup(info);
  87         cfb_fillrect(info, rect);
  88 }
  89
  90 static void
  91 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
  92 {
  93         struct nouveau_fbdev *fbcon = info->par;
  94         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
  95         struct nvif_device *device = &drm->device;
  96         int ret;
  97
  98         if (info->state != FBINFO_STATE_RUNNING)
  99                 return;
 100
 101         ret = -ENODEV;
 102         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 103             mutex_trylock(&drm->client.mutex)) {
 104                 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
 105                         ret = nv04_fbcon_copyarea(info, image);
 106                 else
 107                 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
 108                         ret = nv50_fbcon_copyarea(info, image);
 109                 else
 110                         ret = nvc0_fbcon_copyarea(info, image);
 111                 mutex_unlock(&drm->client.mutex);
 112         }
 113
 114         if (ret == 0)
 115                 return;
 116
 117         if (ret != -ENODEV)
 118                 nouveau_fbcon_gpu_lockup(info);
 119         cfb_copyarea(info, image);
 120 }
 121
 122 static void
 123 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
 124 {
 125         struct nouveau_fbdev *fbcon = info->par;
 126         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 127         struct nvif_device *device = &drm->device;
 128         int ret;
 129
 130         if (info->state != FBINFO_STATE_RUNNING)
 131                 return;
 132
 133         ret = -ENODEV;
 134         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 135             mutex_trylock(&drm->client.mutex)) {
 136                 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
 137                         ret = nv04_fbcon_imageblit(info, image);
 138                 else
 139                 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
 140                         ret = nv50_fbcon_imageblit(info, image);
 141                 else
 142                         ret = nvc0_fbcon_imageblit(info, image);
 143                 mutex_unlock(&drm->client.mutex);
 144         }
 145
 146         if (ret == 0)
 147                 return;
 148
 149         if (ret != -ENODEV)
 150                 nouveau_fbcon_gpu_lockup(info);
 151         cfb_imageblit(info, image);
 152 }
 153
 154 static int
 155 nouveau_fbcon_sync(struct fb_info *info)
 156 {
 157         struct nouveau_fbdev *fbcon = info->par;
 158         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 159         struct nouveau_channel *chan = drm->channel;
 160         int ret;
 161
 162         if (!chan || !chan->accel_done || in_interrupt() ||
 163             info->state != FBINFO_STATE_RUNNING ||
 164             info->flags & FBINFO_HWACCEL_DISABLED)
 165                 return 0;
 166
 167         if (!mutex_trylock(&drm->client.mutex))
 168                 return 0;
 169
 170         ret = nouveau_channel_idle(chan);
 171         mutex_unlock(&drm->client.mutex);
 172         if (ret) {
 173                 nouveau_fbcon_gpu_lockup(info);
 174                 return 0;
 175         }
 176
 177         chan->accel_done = false;
 178         return 0;
 179 }
 180
 181 static struct fb_ops nouveau_fbcon_ops = {
 182         .owner = THIS_MODULE,
 183         .fb_check_var = drm_fb_helper_check_var,
 184         .fb_set_par = drm_fb_helper_set_par,
 185         .fb_fillrect = nouveau_fbcon_fillrect,
 186         .fb_copyarea = nouveau_fbcon_copyarea,
 187         .fb_imageblit = nouveau_fbcon_imageblit,
 188         .fb_sync = nouveau_fbcon_sync,
 189         .fb_pan_display = drm_fb_helper_pan_display,
 190         .fb_blank = drm_fb_helper_blank,
 191         .fb_setcmap = drm_fb_helper_setcmap,
 192         .fb_debug_enter = drm_fb_helper_debug_enter,
 193         .fb_debug_leave = drm_fb_helper_debug_leave,
 194 };
 195
 196 static struct fb_ops nouveau_fbcon_sw_ops = {
 197         .owner = THIS_MODULE,
 198         .fb_check_var = drm_fb_helper_check_var,
 199         .fb_set_par = drm_fb_helper_set_par,
 200         .fb_fillrect = cfb_fillrect,
 201         .fb_copyarea = cfb_copyarea,
 202         .fb_imageblit = cfb_imageblit,
 203         .fb_pan_display = drm_fb_helper_pan_display,
 204         .fb_blank = drm_fb_helper_blank,
 205         .fb_setcmap = drm_fb_helper_setcmap,
 206         .fb_debug_enter = drm_fb_helper_debug_enter,
 207         .fb_debug_leave = drm_fb_helper_debug_leave,
 208 };
 209
 210 void
 211 nouveau_fbcon_accel_save_disable(struct drm_device *dev)
 212 {
 213         struct nouveau_drm *drm = nouveau_drm(dev);
 214         if (drm->fbcon) {
 215                 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
 216                 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 217         }
 218 }
 219
 220 void
 221 nouveau_fbcon_accel_restore(struct drm_device *dev)
 222 {
 223         struct nouveau_drm *drm = nouveau_drm(dev);
 224         if (drm->fbcon) {
 225                 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
 226         }
 227 }
 228
 229 static void
 230 nouveau_fbcon_accel_fini(struct drm_device *dev)
 231 {
 232         struct nouveau_drm *drm = nouveau_drm(dev);
 233         struct nouveau_fbdev *fbcon = drm->fbcon;
 234         if (fbcon && drm->channel) {
 235                 console_lock();
 236                 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 237                 console_unlock();
 238                 nouveau_channel_idle(drm->channel);
 239                 nvif_object_fini(&fbcon->twod);
 240                 nvif_object_fini(&fbcon->blit);
 241                 nvif_object_fini(&fbcon->gdi);
 242                 nvif_object_fini(&fbcon->patt);
 243                 nvif_object_fini(&fbcon->rop);
 244                 nvif_object_fini(&fbcon->clip);
 245                 nvif_object_fini(&fbcon->surf2d);
 246         }
 247 }
 248
 249 static void
 250 nouveau_fbcon_accel_init(struct drm_device *dev)
 251 {
 252         struct nouveau_drm *drm = nouveau_drm(dev);
 253         struct nouveau_fbdev *fbcon = drm->fbcon;
 254         struct fb_info *info = fbcon->helper.fbdev;
 255         int ret;
 256
 257         if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
 258                 ret = nv04_fbcon_accel_init(info);
 259         else
 260         if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI)
 261                 ret = nv50_fbcon_accel_init(info);
 262         else
 263                 ret = nvc0_fbcon_accel_init(info);
 264
 265         if (ret == 0)
 266                 info->fbops = &nouveau_fbcon_ops;
 267 }
 268
 269 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 270                                     u16 blue, int regno)
 271 {
 272         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 273
 274         nv_crtc->lut.r[regno] = red;
 275         nv_crtc->lut.g[regno] = green;
 276         nv_crtc->lut.b[regno] = blue;
 277 }
 278
 279 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 280                                     u16 *blue, int regno)
 281 {
 282         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 283
 284         *red = nv_crtc->lut.r[regno];
 285         *green = nv_crtc->lut.g[regno];
 286         *blue = nv_crtc->lut.b[regno];
 287 }
 288
 289 static void
 290 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 291 {
 292         struct fb_info *info = fbcon->helper.fbdev;
 293         struct fb_fillrect rect;
 294
 295         /* Clear the entire fbcon.  The drm will program every connector
 296          * with it's preferred mode.  If the sizes differ, one display will
 297          * quite likely have garbage around the console.
 298          */
 299         rect.dx = rect.dy = 0;
 300         rect.width = info->var.xres_virtual;
 301         rect.height = info->var.yres_virtual;
 302         rect.color = 0;
 303         rect.rop = ROP_COPY;
 304         info->fbops->fb_fillrect(info, &rect);
 305 }
 306
 307 static int
 308 nouveau_fbcon_create(struct drm_fb_helper *helper,
 309                      struct drm_fb_helper_surface_size *sizes)
 310 {
 311         struct nouveau_fbdev *fbcon = (struct nouveau_fbdev *)helper;
 312         struct drm_device *dev = fbcon->dev;
 313         struct nouveau_drm *drm = nouveau_drm(dev);
 314         struct nvif_device *device = &drm->device;
 315         struct fb_info *info;
 316         struct drm_framebuffer *fb;
 317         struct nouveau_framebuffer *nouveau_fb;
 318         struct nouveau_channel *chan;
 319         struct nouveau_bo *nvbo;
 320         struct drm_mode_fb_cmd2 mode_cmd;
 321         struct pci_dev *pdev = dev->pdev;
 322         int size, ret;
 323
 324         mode_cmd.width = sizes->surface_width;
 325         mode_cmd.height = sizes->surface_height;
 326
 327         mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
 328         mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
 329
 330         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 331                                                           sizes->surface_depth);
 332
 333         size = mode_cmd.pitches[0] * mode_cmd.height;
 334         size = roundup(size, PAGE_SIZE);
 335
 336         ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
 337                               0, 0x0000, &nvbo);
 338         if (ret) {
 339                 NV_ERROR(drm, "failed to allocate framebuffer\n");
 340                 goto out;
 341         }
 342
 343         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 344         if (ret) {
 345                 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
 346                 goto out_unref;
 347         }
 348
 349         ret = nouveau_bo_map(nvbo);
 350         if (ret) {
 351                 NV_ERROR(drm, "failed to map fb: %d\n", ret);
 352                 goto out_unpin;
 353         }
 354
 355         chan = nouveau_nofbaccel ? NULL : drm->channel;
 356         if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 357                 ret = nouveau_bo_vma_add(nvbo, drm->client.vm,
 358                                         &fbcon->nouveau_fb.vma);
 359                 if (ret) {
 360                         NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
 361                         chan = NULL;
 362                 }
 363         }
 364
 365         mutex_lock(&dev->struct_mutex);
 366
 367         info = framebuffer_alloc(0, &pdev->dev);
 368         if (!info) {
 369                 ret = -ENOMEM;
 370                 goto out_unlock;
 371         }
 372
 373         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 374         if (ret) {
 375                 ret = -ENOMEM;
 376                 framebuffer_release(info);
 377                 goto out_unlock;
 378         }
 379
 380         info->par = fbcon;
 381
 382         nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
 383
 384         nouveau_fb = &fbcon->nouveau_fb;
 385         fb = &nouveau_fb->base;
 386
 387         /* setup helper */
 388         fbcon->helper.fb = fb;
 389         fbcon->helper.fbdev = info;
 390
 391         strcpy(info->fix.id, "nouveaufb");
 392         if (!chan)
 393                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 394         else
 395                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 396                               FBINFO_HWACCEL_FILLRECT |
 397                               FBINFO_HWACCEL_IMAGEBLIT;
 398         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 399         info->fbops = &nouveau_fbcon_sw_ops;
 400         info->fix.smem_start = nvbo->bo.mem.bus.base +
 401                                nvbo->bo.mem.bus.offset;
 402         info->fix.smem_len = size;
 403
 404         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 405         info->screen_size = size;
 406
 407         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 408         drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
 409
 410         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 411
 412         mutex_unlock(&dev->struct_mutex);
 413
 414         if (chan)
 415                 nouveau_fbcon_accel_init(dev);
 416         nouveau_fbcon_zfill(dev, fbcon);
 417
 418         /* To allow resizeing without swapping buffers */
 419         NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
 420                 nouveau_fb->base.width, nouveau_fb->base.height,
 421                 nvbo->bo.offset, nvbo);
 422
 423         vga_switcheroo_client_fb_set(dev->pdev, info);
 424         return 0;
 425
 426 out_unlock:
 427         mutex_unlock(&dev->struct_mutex);
 428         if (chan)
 429                 nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
 430         nouveau_bo_unmap(nvbo);
 431 out_unpin:
 432         nouveau_bo_unpin(nvbo);
 433 out_unref:
 434         nouveau_bo_ref(NULL, &nvbo);
 435 out:
 436         return ret;
 437 }
 438
 439 void
 440 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 441 {
 442         struct nouveau_drm *drm = nouveau_drm(dev);
 443         if (drm->fbcon)
 444                 drm_fb_helper_hotplug_event(&drm->fbcon->helper);
 445 }
 446
 447 static int
 448 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 449 {
 450         struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
 451         struct fb_info *info;
 452
 453         if (fbcon->helper.fbdev) {
 454                 info = fbcon->helper.fbdev;
 455                 unregister_framebuffer(info);
 456                 if (info->cmap.len)
 457                         fb_dealloc_cmap(&info->cmap);
 458                 framebuffer_release(info);
 459         }
 460
 461         if (nouveau_fb->nvbo) {
 462                 nouveau_bo_unmap(nouveau_fb->nvbo);
 463                 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
 464                 nouveau_bo_unpin(nouveau_fb->nvbo);
 465                 drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
 466                 nouveau_fb->nvbo = NULL;
 467         }
 468         drm_fb_helper_fini(&fbcon->helper);
 469         drm_framebuffer_unregister_private(&nouveau_fb->base);
 470         drm_framebuffer_cleanup(&nouveau_fb->base);
 471         return 0;
 472 }
 473
 474 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 475 {
 476         struct nouveau_fbdev *fbcon = info->par;
 477         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 478
 479         NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
 480         info->flags |= FBINFO_HWACCEL_DISABLED;
 481 }
 482
 483 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 484         .gamma_set = nouveau_fbcon_gamma_set,
 485         .gamma_get = nouveau_fbcon_gamma_get,
 486         .fb_probe = nouveau_fbcon_create,
 487 };
 488
 489 static void
 490 nouveau_fbcon_set_suspend_work(struct work_struct *work)
 491 {
 492         struct nouveau_fbdev *fbcon = container_of(work, typeof(*fbcon), work);
 493         console_lock();
 494         nouveau_fbcon_accel_restore(fbcon->dev);
 495         nouveau_fbcon_zfill(fbcon->dev, fbcon);
 496         fb_set_suspend(fbcon->helper.fbdev, FBINFO_STATE_RUNNING);
 497         console_unlock();
 498 }
 499
 500 int
 501 nouveau_fbcon_init(struct drm_device *dev)
 502 {
 503         struct nouveau_drm *drm = nouveau_drm(dev);
 504         struct nouveau_fbdev *fbcon;
 505         int preferred_bpp;
 506         int ret;
 507
 508         if (!dev->mode_config.num_crtc ||
 509             (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
 510                 return 0;
 511
 512         fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 513         if (!fbcon)
 514                 return -ENOMEM;
 515
 516         INIT_WORK(&fbcon->work, nouveau_fbcon_set_suspend_work);
 517         fbcon->dev = dev;
 518         drm->fbcon = fbcon;
 519
 520         drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
 521
 522         ret = drm_fb_helper_init(dev, &fbcon->helper,
 523                                  dev->mode_config.num_crtc, 4);
 524         if (ret) {
 525                 kfree(fbcon);
 526                 return ret;
 527         }
 528
 529         drm_fb_helper_single_add_all_connectors(&fbcon->helper);
 530
 531         if (drm->device.info.ram_size <= 32 * 1024 * 1024)
 532                 preferred_bpp = 8;
 533         else
 534         if (drm->device.info.ram_size <= 64 * 1024 * 1024)
 535                 preferred_bpp = 16;
 536         else
 537                 preferred_bpp = 32;
 538
 539         /* disable all the possible outputs/crtcs before entering KMS mode */
 540         drm_helper_disable_unused_functions(dev);
 541
 542         drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
 543         return 0;
 544 }
 545
 546 void
 547 nouveau_fbcon_fini(struct drm_device *dev)
 548 {
 549         struct nouveau_drm *drm = nouveau_drm(dev);
 550
 551         if (!drm->fbcon)
 552                 return;
 553
 554         nouveau_fbcon_accel_fini(dev);
 555         nouveau_fbcon_destroy(dev, drm->fbcon);
 556         kfree(drm->fbcon);
 557         drm->fbcon = NULL;
 558 }
 559
 560 void
 561 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 562 {
 563         struct nouveau_drm *drm = nouveau_drm(dev);
 564         if (drm->fbcon) {
 565                 if (state == FBINFO_STATE_RUNNING) {
 566                         schedule_work(&drm->fbcon->work);
 567                         return;
 568                 }
 569                 flush_work(&drm->fbcon->work);
 570                 console_lock();
 571                 fb_set_suspend(drm->fbcon->helper.fbdev, state);
 572                 nouveau_fbcon_accel_save_disable(dev);
 573                 console_unlock();
 574         }
 575 }