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/fb.h>
  29 #include <linux/pm_runtime.h>
  30
  31 #include <drm/drmP.h>
  32 #include <drm/drm_crtc.h>
  33 #include <drm/drm_crtc_helper.h>
  34 #include <drm/radeon_drm.h>
  35 #include "radeon.h"
  36
  37 #include <drm/drm_fb_helper.h>
  38
  39 #include <linux/vga_switcheroo.h>
  40
  41 /* object hierarchy -
  42  * this contains a helper + a radeon fb
  43  * the helper contains a pointer to radeon framebuffer baseclass.
  44  */
  45 struct radeon_fbdev {
  46         struct drm_fb_helper helper;
  47         struct radeon_framebuffer rfb;
  48         struct radeon_device *rdev;
  49 };
  50
  51 static int
  52 radeonfb_open(struct fb_info *info, int user)
  53 {
  54         struct radeon_fbdev *rfbdev = info->par;
  55         struct radeon_device *rdev = rfbdev->rdev;
  56         int ret = pm_runtime_get_sync(rdev->ddev->dev);
  57         if (ret < 0 && ret != -EACCES) {
  58                 pm_runtime_mark_last_busy(rdev->ddev->dev);
  59                 pm_runtime_put_autosuspend(rdev->ddev->dev);
  60                 return ret;
  61         }
  62         return 0;
  63 }
  64
  65 static int
  66 radeonfb_release(struct fb_info *info, int user)
  67 {
  68         struct radeon_fbdev *rfbdev = info->par;
  69         struct radeon_device *rdev = rfbdev->rdev;
  70
  71         pm_runtime_mark_last_busy(rdev->ddev->dev);
  72         pm_runtime_put_autosuspend(rdev->ddev->dev);
  73         return 0;
  74 }
  75
  76 static struct fb_ops radeonfb_ops = {
  77         .owner = THIS_MODULE,
  78         .fb_open = radeonfb_open,
  79         .fb_release = radeonfb_release,
  80         .fb_check_var = drm_fb_helper_check_var,
  81         .fb_set_par = drm_fb_helper_set_par,
  82         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  83         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  84         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  85         .fb_pan_display = drm_fb_helper_pan_display,
  86         .fb_blank = drm_fb_helper_blank,
  87         .fb_setcmap = drm_fb_helper_setcmap,
  88         .fb_debug_enter = drm_fb_helper_debug_enter,
  89         .fb_debug_leave = drm_fb_helper_debug_leave,
  90 };
  91
  92
  93 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  94 {
  95         int aligned = width;
  96         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  97         int pitch_mask = 0;
  98
  99         switch (bpp / 8) {
 100         case 1:
 101                 pitch_mask = align_large ? 255 : 127;
 102                 break;
 103         case 2:
 104                 pitch_mask = align_large ? 127 : 31;
 105                 break;
 106         case 3:
 107         case 4:
 108                 pitch_mask = align_large ? 63 : 15;
 109                 break;
 110         }
 111
 112         aligned += pitch_mask;
 113         aligned &= ~pitch_mask;
 114         return aligned;
 115 }
 116
 117 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 118 {
 119         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 120         int ret;
 121
 122         ret = radeon_bo_reserve(rbo, false);
 123         if (likely(ret == 0)) {
 124                 radeon_bo_kunmap(rbo);
 125                 radeon_bo_unpin(rbo);
 126                 radeon_bo_unreserve(rbo);
 127         }
 128         drm_gem_object_unreference_unlocked(gobj);
 129 }
 130
 131 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 132                                          struct drm_mode_fb_cmd2 *mode_cmd,
 133                                          struct drm_gem_object **gobj_p)
 134 {
 135         struct radeon_device *rdev = rfbdev->rdev;
 136         struct drm_gem_object *gobj = NULL;
 137         struct radeon_bo *rbo = NULL;
 138         bool fb_tiled = false; /* useful for testing */
 139         u32 tiling_flags = 0;
 140         int ret;
 141         int aligned_size, size;
 142         int height = mode_cmd->height;
 143         u32 bpp, depth;
 144
 145         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 146
 147         /* need to align pitch with crtc limits */
 148         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 149                                                   fb_tiled) * ((bpp + 1) / 8);
 150
 151         if (rdev->family >= CHIP_R600)
 152                 height = ALIGN(mode_cmd->height, 8);
 153         size = mode_cmd->pitches[0] * height;
 154         aligned_size = ALIGN(size, PAGE_SIZE);
 155         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 156                                        RADEON_GEM_DOMAIN_VRAM,
 157                                        0, true, &gobj);
 158         if (ret) {
 159                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 160                        aligned_size);
 161                 return -ENOMEM;
 162         }
 163         rbo = gem_to_radeon_bo(gobj);
 164
 165         if (fb_tiled)
 166                 tiling_flags = RADEON_TILING_MACRO;
 167
 168 #ifdef __BIG_ENDIAN
 169         switch (bpp) {
 170         case 32:
 171                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 172                 break;
 173         case 16:
 174                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 175         default:
 176                 break;
 177         }
 178 #endif
 179
 180         if (tiling_flags) {
 181                 ret = radeon_bo_set_tiling_flags(rbo,
 182                                                  tiling_flags | RADEON_TILING_SURFACE,
 183                                                  mode_cmd->pitches[0]);
 184                 if (ret)
 185                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 186         }
 187
 188
 189         ret = radeon_bo_reserve(rbo, false);
 190         if (unlikely(ret != 0))
 191                 goto out_unref;
 192         /* Only 27 bit offset for legacy CRTC */
 193         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 194                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 195                                        NULL);
 196         if (ret) {
 197                 radeon_bo_unreserve(rbo);
 198                 goto out_unref;
 199         }
 200         if (fb_tiled)
 201                 radeon_bo_check_tiling(rbo, 0, 0);
 202         ret = radeon_bo_kmap(rbo, NULL);
 203         radeon_bo_unreserve(rbo);
 204         if (ret) {
 205                 goto out_unref;
 206         }
 207
 208         *gobj_p = gobj;
 209         return 0;
 210 out_unref:
 211         radeonfb_destroy_pinned_object(gobj);
 212         *gobj_p = NULL;
 213         return ret;
 214 }
 215
 216 static int radeonfb_create(struct drm_fb_helper *helper,
 217                            struct drm_fb_helper_surface_size *sizes)
 218 {
 219         struct radeon_fbdev *rfbdev =
 220                 container_of(helper, struct radeon_fbdev, helper);
 221         struct radeon_device *rdev = rfbdev->rdev;
 222         struct fb_info *info;
 223         struct drm_framebuffer *fb = NULL;
 224         struct drm_mode_fb_cmd2 mode_cmd;
 225         struct drm_gem_object *gobj = NULL;
 226         struct radeon_bo *rbo = NULL;
 227         int ret;
 228         unsigned long tmp;
 229
 230         mode_cmd.width = sizes->surface_width;
 231         mode_cmd.height = sizes->surface_height;
 232
 233         /* avivo can't scanout real 24bpp */
 234         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 235                 sizes->surface_bpp = 32;
 236
 237         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 238                                                           sizes->surface_depth);
 239
 240         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 241         if (ret) {
 242                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 243                 return ret;
 244         }
 245
 246         rbo = gem_to_radeon_bo(gobj);
 247
 248         /* okay we have an object now allocate the framebuffer */
 249         info = drm_fb_helper_alloc_fbi(helper);
 250         if (IS_ERR(info)) {
 251                 ret = PTR_ERR(info);
 252                 goto out_unref;
 253         }
 254
 255         info->par = rfbdev;
 256         info->skip_vt_switch = true;
 257
 258         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 259         if (ret) {
 260                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 261                 goto out_destroy_fbi;
 262         }
 263
 264         fb = &rfbdev->rfb.base;
 265
 266         /* setup helper */
 267         rfbdev->helper.fb = fb;
 268
 269         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 270
 271         strcpy(info->fix.id, "radeondrmfb");
 272
 273         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 274
 275         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 276         info->fbops = &radeonfb_ops;
 277
 278         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 279         info->fix.smem_start = rdev->mc.aper_base + tmp;
 280         info->fix.smem_len = radeon_bo_size(rbo);
 281         info->screen_base = rbo->kptr;
 282         info->screen_size = radeon_bo_size(rbo);
 283
 284         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 285
 286         /* setup aperture base/size for vesafb takeover */
 287         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 288         info->apertures->ranges[0].size = rdev->mc.aper_size;
 289
 290         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 291
 292         if (info->screen_base == NULL) {
 293                 ret = -ENOSPC;
 294                 goto out_destroy_fbi;
 295         }
 296
 297         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 298         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 299         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 300         DRM_INFO("fb depth is %d\n", fb->depth);
 301         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 302
 303         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 304         return 0;
 305
 306 out_destroy_fbi:
 307         drm_fb_helper_release_fbi(helper);
 308 out_unref:
 309         if (rbo) {
 310
 311         }
 312         if (fb && ret) {
 313                 drm_gem_object_unreference_unlocked(gobj);
 314                 drm_framebuffer_unregister_private(fb);
 315                 drm_framebuffer_cleanup(fb);
 316                 kfree(fb);
 317         }
 318         return ret;
 319 }
 320
 321 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 322 {
 323         if (rdev->mode_info.rfbdev)
 324                 drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 325 }
 326
 327 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 328 {
 329         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 330
 331         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 332         drm_fb_helper_release_fbi(&rfbdev->helper);
 333
 334         if (rfb->obj) {
 335                 radeonfb_destroy_pinned_object(rfb->obj);
 336                 rfb->obj = NULL;
 337         }
 338         drm_fb_helper_fini(&rfbdev->helper);
 339         drm_framebuffer_unregister_private(&rfb->base);
 340         drm_framebuffer_cleanup(&rfb->base);
 341
 342         return 0;
 343 }
 344
 345 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 346         .gamma_set = radeon_crtc_fb_gamma_set,
 347         .gamma_get = radeon_crtc_fb_gamma_get,
 348         .fb_probe = radeonfb_create,
 349 };
 350
 351 int radeon_fbdev_init(struct radeon_device *rdev)
 352 {
 353         struct radeon_fbdev *rfbdev;
 354         int bpp_sel = 32;
 355         int ret;
 356
 357         /* don't enable fbdev if no connectors */
 358         if (list_empty(&rdev->ddev->mode_config.connector_list))
 359                 return 0;
 360
 361         /* select 8 bpp console on RN50 or 16MB cards */
 362         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 363                 bpp_sel = 8;
 364
 365         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 366         if (!rfbdev)
 367                 return -ENOMEM;
 368
 369         rfbdev->rdev = rdev;
 370         rdev->mode_info.rfbdev = rfbdev;
 371
 372         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 373                               &radeon_fb_helper_funcs);
 374
 375         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 376                                  rdev->num_crtc,
 377                                  RADEONFB_CONN_LIMIT);
 378         if (ret)
 379                 goto free;
 380
 381         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 382         if (ret)
 383                 goto fini;
 384
 385         /* disable all the possible outputs/crtcs before entering KMS mode */
 386         drm_helper_disable_unused_functions(rdev->ddev);
 387
 388         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 389         if (ret)
 390                 goto fini;
 391
 392         return 0;
 393
 394 fini:
 395         drm_fb_helper_fini(&rfbdev->helper);
 396 free:
 397         kfree(rfbdev);
 398         return ret;
 399 }
 400
 401 void radeon_fbdev_fini(struct radeon_device *rdev)
 402 {
 403         if (!rdev->mode_info.rfbdev)
 404                 return;
 405
 406         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 407         kfree(rdev->mode_info.rfbdev);
 408         rdev->mode_info.rfbdev = NULL;
 409 }
 410
 411 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 412 {
 413         if (rdev->mode_info.rfbdev)
 414                 fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 415 }
 416
 417 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 418 {
 419         if (!rdev->mode_info.rfbdev)
 420                 return false;
 421
 422         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 423                 return true;
 424         return false;
 425 }
 426
 427 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 428 {
 429         if (rdev->mode_info.rfbdev)
 430                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 431 }
 432
 433 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 434 {
 435         if (rdev->mode_info.rfbdev)
 436                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 437 }
 438
 439 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 440 {
 441         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 442         struct drm_fb_helper *fb_helper;
 443         int ret;
 444
 445         if (!rfbdev)
 446                 return;
 447
 448         fb_helper = &rfbdev->helper;
 449
 450         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 451         if (ret)
 452                 DRM_DEBUG("failed to restore crtc mode\n");
 453 }