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