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/slab.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38 #include <linux/screen_info.h>
  39 #include <linux/vga_switcheroo.h>
  40
  41 #include "drmP.h"
  42 #include "drm.h"
  43 #include "drm_crtc.h"
  44 #include "drm_crtc_helper.h"
  45 #include "drm_fb_helper.h"
  46 #include "nouveau_drv.h"
  47 #include "nouveau_drm.h"
  48 #include "nouveau_crtc.h"
  49 #include "nouveau_fb.h"
  50 #include "nouveau_fbcon.h"
  51 #include "nouveau_dma.h"
  52
  53 static int
  54 nouveau_fbcon_sync(struct fb_info *info)
  55 {
  56         struct nouveau_fbcon_par *par = info->par;
  57         struct drm_device *dev = par->dev;
  58         struct drm_nouveau_private *dev_priv = dev->dev_private;
  59         struct nouveau_channel *chan = dev_priv->channel;
  60         int ret, i;
  61
  62         if (!chan || !chan->accel_done ||
  63             info->state != FBINFO_STATE_RUNNING ||
  64             info->flags & FBINFO_HWACCEL_DISABLED)
  65                 return 0;
  66
  67         if (RING_SPACE(chan, 4)) {
  68                 nouveau_fbcon_gpu_lockup(info);
  69                 return 0;
  70         }
  71
  72         BEGIN_RING(chan, 0, 0x0104, 1);
  73         OUT_RING(chan, 0);
  74         BEGIN_RING(chan, 0, 0x0100, 1);
  75         OUT_RING(chan, 0);
  76         nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
  77         FIRE_RING(chan);
  78
  79         ret = -EBUSY;
  80         for (i = 0; i < 100000; i++) {
  81                 if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
  82                         ret = 0;
  83                         break;
  84                 }
  85                 DRM_UDELAY(1);
  86         }
  87
  88         if (ret) {
  89                 nouveau_fbcon_gpu_lockup(info);
  90                 return 0;
  91         }
  92
  93         chan->accel_done = false;
  94         return 0;
  95 }
  96
  97 static struct fb_ops nouveau_fbcon_ops = {
  98         .owner = THIS_MODULE,
  99         .fb_check_var = drm_fb_helper_check_var,
 100         .fb_set_par = drm_fb_helper_set_par,
 101         .fb_setcolreg = drm_fb_helper_setcolreg,
 102         .fb_fillrect = cfb_fillrect,
 103         .fb_copyarea = cfb_copyarea,
 104         .fb_imageblit = cfb_imageblit,
 105         .fb_sync = nouveau_fbcon_sync,
 106         .fb_pan_display = drm_fb_helper_pan_display,
 107         .fb_blank = drm_fb_helper_blank,
 108         .fb_setcmap = drm_fb_helper_setcmap,
 109 };
 110
 111 static struct fb_ops nv04_fbcon_ops = {
 112         .owner = THIS_MODULE,
 113         .fb_check_var = drm_fb_helper_check_var,
 114         .fb_set_par = drm_fb_helper_set_par,
 115         .fb_setcolreg = drm_fb_helper_setcolreg,
 116         .fb_fillrect = nv04_fbcon_fillrect,
 117         .fb_copyarea = nv04_fbcon_copyarea,
 118         .fb_imageblit = nv04_fbcon_imageblit,
 119         .fb_sync = nouveau_fbcon_sync,
 120         .fb_pan_display = drm_fb_helper_pan_display,
 121         .fb_blank = drm_fb_helper_blank,
 122         .fb_setcmap = drm_fb_helper_setcmap,
 123 };
 124
 125 static struct fb_ops nv50_fbcon_ops = {
 126         .owner = THIS_MODULE,
 127         .fb_check_var = drm_fb_helper_check_var,
 128         .fb_set_par = drm_fb_helper_set_par,
 129         .fb_setcolreg = drm_fb_helper_setcolreg,
 130         .fb_fillrect = nv50_fbcon_fillrect,
 131         .fb_copyarea = nv50_fbcon_copyarea,
 132         .fb_imageblit = nv50_fbcon_imageblit,
 133         .fb_sync = nouveau_fbcon_sync,
 134         .fb_pan_display = drm_fb_helper_pan_display,
 135         .fb_blank = drm_fb_helper_blank,
 136         .fb_setcmap = drm_fb_helper_setcmap,
 137 };
 138
 139 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 140                                     u16 blue, int regno)
 141 {
 142         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 143
 144         nv_crtc->lut.r[regno] = red;
 145         nv_crtc->lut.g[regno] = green;
 146         nv_crtc->lut.b[regno] = blue;
 147 }
 148
 149 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 150                                     u16 *blue, int regno)
 151 {
 152         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 153
 154         *red = nv_crtc->lut.r[regno];
 155         *green = nv_crtc->lut.g[regno];
 156         *blue = nv_crtc->lut.b[regno];
 157 }
 158
 159 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 160         .gamma_set = nouveau_fbcon_gamma_set,
 161         .gamma_get = nouveau_fbcon_gamma_get
 162 };
 163
 164 #if defined(__i386__) || defined(__x86_64__)
 165 static bool
 166 nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
 167 {
 168         struct pci_dev *pdev = dev->pdev;
 169         int ramin;
 170
 171         if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
 172             screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
 173                 return false;
 174
 175         if (screen_info.lfb_base < pci_resource_start(pdev, 1))
 176                 goto not_fb;
 177
 178         if (screen_info.lfb_base + screen_info.lfb_size >=
 179             pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
 180                 goto not_fb;
 181
 182         return true;
 183 not_fb:
 184         ramin = 2;
 185         if (pci_resource_len(pdev, ramin) == 0) {
 186                 ramin = 3;
 187                 if (pci_resource_len(pdev, ramin) == 0)
 188                         return false;
 189         }
 190
 191         if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
 192                 return false;
 193
 194         if (screen_info.lfb_base + screen_info.lfb_size >=
 195             pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
 196                 return false;
 197
 198         return true;
 199 }
 200 #endif
 201
 202 void
 203 nouveau_fbcon_zfill(struct drm_device *dev)
 204 {
 205         struct drm_nouveau_private *dev_priv = dev->dev_private;
 206         struct fb_info *info = dev_priv->fbdev_info;
 207         struct fb_fillrect rect;
 208
 209         /* Clear the entire fbcon.  The drm will program every connector
 210          * with it's preferred mode.  If the sizes differ, one display will
 211          * quite likely have garbage around the console.
 212          */
 213         rect.dx = rect.dy = 0;
 214         rect.width = info->var.xres_virtual;
 215         rect.height = info->var.yres_virtual;
 216         rect.color = 0;
 217         rect.rop = ROP_COPY;
 218         info->fbops->fb_fillrect(info, &rect);
 219 }
 220
 221 static int
 222 nouveau_fbcon_create(struct drm_device *dev, uint32_t fb_width,
 223                      uint32_t fb_height, uint32_t surface_width,
 224                      uint32_t surface_height, uint32_t surface_depth,
 225                      uint32_t surface_bpp, struct drm_framebuffer **pfb)
 226 {
 227         struct drm_nouveau_private *dev_priv = dev->dev_private;
 228         struct fb_info *info;
 229         struct nouveau_fbcon_par *par;
 230         struct drm_framebuffer *fb;
 231         struct nouveau_framebuffer *nouveau_fb;
 232         struct nouveau_bo *nvbo;
 233         struct drm_mode_fb_cmd mode_cmd;
 234         struct device *device = &dev->pdev->dev;
 235         int size, ret;
 236
 237         mode_cmd.width = surface_width;
 238         mode_cmd.height = surface_height;
 239
 240         mode_cmd.bpp = surface_bpp;
 241         mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
 242         mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
 243         mode_cmd.depth = surface_depth;
 244
 245         size = mode_cmd.pitch * mode_cmd.height;
 246         size = roundup(size, PAGE_SIZE);
 247
 248         ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
 249                               0, 0x0000, false, true, &nvbo);
 250         if (ret) {
 251                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 252                 goto out;
 253         }
 254
 255         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 256         if (ret) {
 257                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 258                 nouveau_bo_ref(NULL, &nvbo);
 259                 goto out;
 260         }
 261
 262         ret = nouveau_bo_map(nvbo);
 263         if (ret) {
 264                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 265                 nouveau_bo_unpin(nvbo);
 266                 nouveau_bo_ref(NULL, &nvbo);
 267                 goto out;
 268         }
 269
 270         mutex_lock(&dev->struct_mutex);
 271
 272         fb = nouveau_framebuffer_create(dev, nvbo, &mode_cmd);
 273         if (!fb) {
 274                 ret = -ENOMEM;
 275                 NV_ERROR(dev, "failed to allocate fb.\n");
 276                 goto out_unref;
 277         }
 278
 279         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
 280
 281         nouveau_fb = nouveau_framebuffer(fb);
 282         *pfb = fb;
 283
 284         info = framebuffer_alloc(sizeof(struct nouveau_fbcon_par), device);
 285         if (!info) {
 286                 ret = -ENOMEM;
 287                 goto out_unref;
 288         }
 289
 290         par = info->par;
 291         par->helper.funcs = &nouveau_fbcon_helper_funcs;
 292         par->helper.dev = dev;
 293         ret = drm_fb_helper_init_crtc_count(&par->helper, 2, 4);
 294         if (ret)
 295                 goto out_unref;
 296         dev_priv->fbdev_info = info;
 297
 298         strcpy(info->fix.id, "nouveaufb");
 299         if (nouveau_nofbaccel)
 300                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 301         else
 302                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 303                               FBINFO_HWACCEL_FILLRECT |
 304                               FBINFO_HWACCEL_IMAGEBLIT;
 305         info->fbops = &nouveau_fbcon_ops;
 306         info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
 307                                dev_priv->vm_vram_base;
 308         info->fix.smem_len = size;
 309
 310         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 311         info->screen_size = size;
 312
 313         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 314         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 315
 316         /* FIXME: we really shouldn't expose mmio space at all */
 317         info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
 318         info->fix.mmio_len = pci_resource_len(dev->pdev, 1);
 319
 320         /* Set aperture base/size for vesafb takeover */
 321 #if defined(__i386__) || defined(__x86_64__)
 322         if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
 323                 /* Some NVIDIA VBIOS' are stupid and decide to put the
 324                  * framebuffer in the middle of the PRAMIN BAR for
 325                  * whatever reason.  We need to know the exact lfb_base
 326                  * to get vesafb kicked off, and the only reliable way
 327                  * we have left is to find out lfb_base the same way
 328                  * vesafb did.
 329                  */
 330                 info->aperture_base = screen_info.lfb_base;
 331                 info->aperture_size = screen_info.lfb_size;
 332                 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
 333                         info->aperture_size *= 65536;
 334         } else
 335 #endif
 336         {
 337                 info->aperture_base = info->fix.mmio_start;
 338                 info->aperture_size = info->fix.mmio_len;
 339         }
 340
 341         info->pixmap.size = 64*1024;
 342         info->pixmap.buf_align = 8;
 343         info->pixmap.access_align = 32;
 344         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 345         info->pixmap.scan_align = 1;
 346
 347         fb->fbdev = info;
 348
 349         par->nouveau_fb = nouveau_fb;
 350         par->dev = dev;
 351
 352         if (dev_priv->channel && !nouveau_nofbaccel) {
 353                 switch (dev_priv->card_type) {
 354                 case NV_50:
 355                         nv50_fbcon_accel_init(info);
 356                         info->fbops = &nv50_fbcon_ops;
 357                         break;
 358                 default:
 359                         nv04_fbcon_accel_init(info);
 360                         info->fbops = &nv04_fbcon_ops;
 361                         break;
 362                 };
 363         }
 364
 365         nouveau_fbcon_zfill(dev);
 366
 367         /* To allow resizeing without swapping buffers */
 368         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 369                                                 nouveau_fb->base.width,
 370                                                 nouveau_fb->base.height,
 371                                                 nvbo->bo.offset, nvbo);
 372
 373         mutex_unlock(&dev->struct_mutex);
 374         vga_switcheroo_client_fb_set(dev->pdev, info);
 375         return 0;
 376
 377 out_unref:
 378         mutex_unlock(&dev->struct_mutex);
 379 out:
 380         return ret;
 381 }
 382
 383 int
 384 nouveau_fbcon_probe(struct drm_device *dev)
 385 {
 386         NV_DEBUG_KMS(dev, "\n");
 387
 388         return drm_fb_helper_single_fb_probe(dev, 32, nouveau_fbcon_create);
 389 }
 390
 391 int
 392 nouveau_fbcon_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 393 {
 394         struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fb);
 395         struct fb_info *info;
 396
 397         if (!fb)
 398                 return -EINVAL;
 399
 400         info = fb->fbdev;
 401         if (info) {
 402                 struct nouveau_fbcon_par *par = info->par;
 403
 404                 unregister_framebuffer(info);
 405                 nouveau_bo_unmap(nouveau_fb->nvbo);
 406                 mutex_lock(&dev->struct_mutex);
 407                 drm_gem_object_unreference(nouveau_fb->nvbo->gem);
 408                 nouveau_fb->nvbo = NULL;
 409                 mutex_unlock(&dev->struct_mutex);
 410                 if (par)
 411                         drm_fb_helper_free(&par->helper);
 412                 framebuffer_release(info);
 413         }
 414
 415         return 0;
 416 }
 417
 418 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 419 {
 420         struct nouveau_fbcon_par *par = info->par;
 421         struct drm_device *dev = par->dev;
 422
 423         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 424         info->flags |= FBINFO_HWACCEL_DISABLED;
 425 }