drivers/gpu/drm/radeon/radeon_fb.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 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/pm_runtime.h>
  29
  30 #include <drm/drmP.h>
  31 #include <drm/drm_crtc.h>
  32 #include <drm/drm_crtc_helper.h>
  33 #include <drm/radeon_drm.h>
  34 #include "radeon.h"
  35
  36 #include <drm/drm_fb_helper.h>
  37
  38 #include <linux/vga_switcheroo.h>
  39
  40 /* object hierarchy -
  41  * this contains a helper + a radeon fb
  42  * the helper contains a pointer to radeon framebuffer baseclass.
  43  */
  44 struct radeon_fbdev {
  45         struct drm_fb_helper helper;
  46         struct radeon_framebuffer rfb;
  47         struct radeon_device *rdev;
  48 };
  49
  50 static int
  51 radeonfb_open(struct fb_info *info, int user)
  52 {
  53         struct radeon_fbdev *rfbdev = info->par;
  54         struct radeon_device *rdev = rfbdev->rdev;
  55         int ret = pm_runtime_get_sync(rdev->ddev->dev);
  56         if (ret < 0 && ret != -EACCES) {
  57                 pm_runtime_mark_last_busy(rdev->ddev->dev);
  58                 pm_runtime_put_autosuspend(rdev->ddev->dev);
  59                 return ret;
  60         }
  61         return 0;
  62 }
  63
  64 static int
  65 radeonfb_release(struct fb_info *info, int user)
  66 {
  67         struct radeon_fbdev *rfbdev = info->par;
  68         struct radeon_device *rdev = rfbdev->rdev;
  69
  70         pm_runtime_mark_last_busy(rdev->ddev->dev);
  71         pm_runtime_put_autosuspend(rdev->ddev->dev);
  72         return 0;
  73 }
  74
  75 static struct fb_ops radeonfb_ops = {
  76         .owner = THIS_MODULE,
  77         .fb_open = radeonfb_open,
  78         .fb_release = radeonfb_release,
  79         .fb_check_var = drm_fb_helper_check_var,
  80         .fb_set_par = drm_fb_helper_set_par,
  81         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  82         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  83         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  84         .fb_pan_display = drm_fb_helper_pan_display,
  85         .fb_blank = drm_fb_helper_blank,
  86         .fb_setcmap = drm_fb_helper_setcmap,
  87         .fb_debug_enter = drm_fb_helper_debug_enter,
  88         .fb_debug_leave = drm_fb_helper_debug_leave,
  89 };
  90
  91
  92 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  93 {
  94         int aligned = width;
  95         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  96         int pitch_mask = 0;
  97
  98         switch (bpp / 8) {
  99         case 1:
 100                 pitch_mask = align_large ? 255 : 127;
 101                 break;
 102         case 2:
 103                 pitch_mask = align_large ? 127 : 31;
 104                 break;
 105         case 3:
 106         case 4:
 107                 pitch_mask = align_large ? 63 : 15;
 108                 break;
 109         }
 110
 111         aligned += pitch_mask;
 112         aligned &= ~pitch_mask;
 113         return aligned;
 114 }
 115
 116 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 117 {
 118         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 119         int ret;
 120
 121         ret = radeon_bo_reserve(rbo, false);
 122         if (likely(ret == 0)) {
 123                 radeon_bo_kunmap(rbo);
 124                 radeon_bo_unpin(rbo);
 125                 radeon_bo_unreserve(rbo);
 126         }
 127         drm_gem_object_unreference_unlocked(gobj);
 128 }
 129
 130 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 131                                          struct drm_mode_fb_cmd2 *mode_cmd,
 132                                          struct drm_gem_object **gobj_p)
 133 {
 134         struct radeon_device *rdev = rfbdev->rdev;
 135         struct drm_gem_object *gobj = NULL;
 136         struct radeon_bo *rbo = NULL;
 137         bool fb_tiled = false; /* useful for testing */
 138         u32 tiling_flags = 0;
 139         int ret;
 140         int aligned_size, size;
 141         int height = mode_cmd->height;
 142         u32 bpp, depth;
 143
 144         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 145
 146         /* need to align pitch with crtc limits */
 147         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 148                                                   fb_tiled) * ((bpp + 1) / 8);
 149
 150         if (rdev->family >= CHIP_R600)
 151                 height = ALIGN(mode_cmd->height, 8);
 152         size = mode_cmd->pitches[0] * height;
 153         aligned_size = ALIGN(size, PAGE_SIZE);
 154         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 155                                        RADEON_GEM_DOMAIN_VRAM,
 156                                        0, true, &gobj);
 157         if (ret) {
 158                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 159                        aligned_size);
 160                 return -ENOMEM;
 161         }
 162         rbo = gem_to_radeon_bo(gobj);
 163
 164         if (fb_tiled)
 165                 tiling_flags = RADEON_TILING_MACRO;
 166
 167 #ifdef __BIG_ENDIAN
 168         switch (bpp) {
 169         case 32:
 170                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 171                 break;
 172         case 16:
 173                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 174         default:
 175                 break;
 176         }
 177 #endif
 178
 179         if (tiling_flags) {
 180                 ret = radeon_bo_set_tiling_flags(rbo,
 181                                                  tiling_flags | RADEON_TILING_SURFACE,
 182                                                  mode_cmd->pitches[0]);
 183                 if (ret)
 184                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 185         }
 186
 187
 188         ret = radeon_bo_reserve(rbo, false);
 189         if (unlikely(ret != 0))
 190                 goto out_unref;
 191         /* Only 27 bit offset for legacy CRTC */
 192         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 193                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 194                                        NULL);
 195         if (ret) {
 196                 radeon_bo_unreserve(rbo);
 197                 goto out_unref;
 198         }
 199         if (fb_tiled)
 200                 radeon_bo_check_tiling(rbo, 0, 0);
 201         ret = radeon_bo_kmap(rbo, NULL);
 202         radeon_bo_unreserve(rbo);
 203         if (ret) {
 204                 goto out_unref;
 205         }
 206
 207         *gobj_p = gobj;
 208         return 0;
 209 out_unref:
 210         radeonfb_destroy_pinned_object(gobj);
 211         *gobj_p = NULL;
 212         return ret;
 213 }
 214
 215 static int radeonfb_create(struct drm_fb_helper *helper,
 216                            struct drm_fb_helper_surface_size *sizes)
 217 {
 218         struct radeon_fbdev *rfbdev =
 219                 container_of(helper, struct radeon_fbdev, helper);
 220         struct radeon_device *rdev = rfbdev->rdev;
 221         struct fb_info *info;
 222         struct drm_framebuffer *fb = NULL;
 223         struct drm_mode_fb_cmd2 mode_cmd;
 224         struct drm_gem_object *gobj = NULL;
 225         struct radeon_bo *rbo = NULL;
 226         int ret;
 227         unsigned long tmp;
 228
 229         mode_cmd.width = sizes->surface_width;
 230         mode_cmd.height = sizes->surface_height;
 231
 232         /* avivo can't scanout real 24bpp */
 233         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 234                 sizes->surface_bpp = 32;
 235
 236         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 237                                                           sizes->surface_depth);
 238
 239         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 240         if (ret) {
 241                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 242                 return ret;
 243         }
 244
 245         rbo = gem_to_radeon_bo(gobj);
 246
 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 = radeon_framebuffer_init(rdev->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, radeon_bo_size(rbo));
 269
 270         strcpy(info->fix.id, "radeondrmfb");
 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 = &radeonfb_ops;
 276
 277         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 278         info->fix.smem_start = rdev->mc.aper_base + tmp;
 279         info->fix.smem_len = radeon_bo_size(rbo);
 280         info->screen_base = rbo->kptr;
 281         info->screen_size = radeon_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 = rdev->ddev->mode_config.fb_base;
 287         info->apertures->ranges[0].size = rdev->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)rdev->mc.aper_base);
 298         DRM_INFO("size %lu\n", (unsigned long)radeon_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(rdev->ddev->pdev, info);
 303         return 0;
 304
 305 out_destroy_fbi:
 306         drm_fb_helper_release_fbi(helper);
 307 out_unref:
 308         if (rbo) {
 309
 310         }
 311         if (fb && ret) {
 312                 drm_gem_object_unreference_unlocked(gobj);
 313                 drm_framebuffer_unregister_private(fb);
 314                 drm_framebuffer_cleanup(fb);
 315                 kfree(fb);
 316         }
 317         return ret;
 318 }
 319
 320 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 321 {
 322         if (rdev->mode_info.rfbdev)
 323                 drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 324 }
 325
 326 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 327 {
 328         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 329
 330         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 331         drm_fb_helper_release_fbi(&rfbdev->helper);
 332
 333         if (rfb->obj) {
 334                 radeonfb_destroy_pinned_object(rfb->obj);
 335                 rfb->obj = NULL;
 336         }
 337         drm_fb_helper_fini(&rfbdev->helper);
 338         drm_framebuffer_unregister_private(&rfb->base);
 339         drm_framebuffer_cleanup(&rfb->base);
 340
 341         return 0;
 342 }
 343
 344 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 345         .gamma_set = radeon_crtc_fb_gamma_set,
 346         .gamma_get = radeon_crtc_fb_gamma_get,
 347         .fb_probe = radeonfb_create,
 348 };
 349
 350 int radeon_fbdev_init(struct radeon_device *rdev)
 351 {
 352         struct radeon_fbdev *rfbdev;
 353         int bpp_sel = 32;
 354         int ret;
 355
 356         /* don't enable fbdev if no connectors */
 357         if (list_empty(&rdev->ddev->mode_config.connector_list))
 358                 return 0;
 359
 360         /* select 8 bpp console on RN50 or 16MB cards */
 361         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 362                 bpp_sel = 8;
 363
 364         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 365         if (!rfbdev)
 366                 return -ENOMEM;
 367
 368         rfbdev->rdev = rdev;
 369         rdev->mode_info.rfbdev = rfbdev;
 370
 371         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 372                               &radeon_fb_helper_funcs);
 373
 374         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 375                                  rdev->num_crtc,
 376                                  RADEONFB_CONN_LIMIT);
 377         if (ret)
 378                 goto free;
 379
 380         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 381         if (ret)
 382                 goto fini;
 383
 384         /* disable all the possible outputs/crtcs before entering KMS mode */
 385         drm_helper_disable_unused_functions(rdev->ddev);
 386
 387         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 388         if (ret)
 389                 goto fini;
 390
 391         return 0;
 392
 393 fini:
 394         drm_fb_helper_fini(&rfbdev->helper);
 395 free:
 396         kfree(rfbdev);
 397         return ret;
 398 }
 399
 400 void radeon_fbdev_fini(struct radeon_device *rdev)
 401 {
 402         if (!rdev->mode_info.rfbdev)
 403                 return;
 404
 405         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 406         kfree(rdev->mode_info.rfbdev);
 407         rdev->mode_info.rfbdev = NULL;
 408 }
 409
 410 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 411 {
 412         if (rdev->mode_info.rfbdev)
 413                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 414 }
 415
 416 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 417 {
 418         if (!rdev->mode_info.rfbdev)
 419                 return false;
 420
 421         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 422                 return true;
 423         return false;
 424 }
 425
 426 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 427 {
 428         if (rdev->mode_info.rfbdev)
 429                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 430 }
 431
 432 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 433 {
 434         if (rdev->mode_info.rfbdev)
 435                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 436 }
 437
 438 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 439 {
 440         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 441         struct drm_fb_helper *fb_helper;
 442         int ret;
 443
 444         if (!rfbdev)
 445                 return;
 446
 447         fb_helper = &rfbdev->helper;
 448
 449         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 450         if (ret)
 451                 DRM_DEBUG("failed to restore crtc mode\n");
 452 }