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