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
  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 list_head fbdev_list;
  48         struct radeon_device *rdev;
  49 };
  50
  51 /**
  52  * radeon_fb_helper_set_par - Hide cursor on CRTCs used by fbdev.
  53  *
  54  * @info: fbdev info
  55  *
  56  * This function hides the cursor on all CRTCs used by fbdev.
  57  */
  58 static int radeon_fb_helper_set_par(struct fb_info *info)
  59 {
  60         int ret;
  61
  62         ret = drm_fb_helper_set_par(info);
  63
  64         /* XXX: with universal plane support fbdev will automatically disable
  65          * all non-primary planes (including the cursor)
  66          */
  67         if (ret == 0) {
  68                 struct drm_fb_helper *fb_helper = info->par;
  69                 int i;
  70
  71                 for (i = 0; i < fb_helper->crtc_count; i++) {
  72                         struct drm_crtc *crtc = fb_helper->crtc_info[i].mode_set.crtc;
  73
  74                         radeon_crtc_cursor_set2(crtc, NULL, 0, 0, 0, 0, 0);
  75                 }
  76         }
  77
  78         return ret;
  79 }
  80
  81 static struct fb_ops radeonfb_ops = {
  82         .owner = THIS_MODULE,
  83         .fb_check_var = drm_fb_helper_check_var,
  84         .fb_set_par = radeon_fb_helper_set_par,
  85         .fb_fillrect = cfb_fillrect,
  86         .fb_copyarea = cfb_copyarea,
  87         .fb_imageblit = cfb_imageblit,
  88         .fb_pan_display = drm_fb_helper_pan_display,
  89         .fb_blank = drm_fb_helper_blank,
  90         .fb_setcmap = drm_fb_helper_setcmap,
  91         .fb_debug_enter = drm_fb_helper_debug_enter,
  92         .fb_debug_leave = drm_fb_helper_debug_leave,
  93 };
  94
  95
  96 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  97 {
  98         int aligned = width;
  99         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 100         int pitch_mask = 0;
 101
 102         switch (bpp / 8) {
 103         case 1:
 104                 pitch_mask = align_large ? 255 : 127;
 105                 break;
 106         case 2:
 107                 pitch_mask = align_large ? 127 : 31;
 108                 break;
 109         case 3:
 110         case 4:
 111                 pitch_mask = align_large ? 63 : 15;
 112                 break;
 113         }
 114
 115         aligned += pitch_mask;
 116         aligned &= ~pitch_mask;
 117         return aligned;
 118 }
 119
 120 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 121 {
 122         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 123         int ret;
 124
 125         ret = radeon_bo_reserve(rbo, false);
 126         if (likely(ret == 0)) {
 127                 radeon_bo_kunmap(rbo);
 128                 radeon_bo_unpin(rbo);
 129                 radeon_bo_unreserve(rbo);
 130         }
 131         drm_gem_object_unreference_unlocked(gobj);
 132 }
 133
 134 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 135                                          struct drm_mode_fb_cmd2 *mode_cmd,
 136                                          struct drm_gem_object **gobj_p)
 137 {
 138         struct radeon_device *rdev = rfbdev->rdev;
 139         struct drm_gem_object *gobj = NULL;
 140         struct radeon_bo *rbo = NULL;
 141         bool fb_tiled = false; /* useful for testing */
 142         u32 tiling_flags = 0;
 143         int ret;
 144         int aligned_size, size;
 145         int height = mode_cmd->height;
 146         u32 bpp, depth;
 147
 148         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 149
 150         /* need to align pitch with crtc limits */
 151         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 152                                                   fb_tiled) * ((bpp + 1) / 8);
 153
 154         if (rdev->family >= CHIP_R600)
 155                 height = ALIGN(mode_cmd->height, 8);
 156         size = mode_cmd->pitches[0] * height;
 157         aligned_size = ALIGN(size, PAGE_SIZE);
 158         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 159                                        RADEON_GEM_DOMAIN_VRAM,
 160                                        0, true, &gobj);
 161         if (ret) {
 162                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 163                        aligned_size);
 164                 return -ENOMEM;
 165         }
 166         rbo = gem_to_radeon_bo(gobj);
 167
 168         if (fb_tiled)
 169                 tiling_flags = RADEON_TILING_MACRO;
 170
 171 #ifdef __BIG_ENDIAN
 172         switch (bpp) {
 173         case 32:
 174                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 175                 break;
 176         case 16:
 177                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 178         default:
 179                 break;
 180         }
 181 #endif
 182
 183         if (tiling_flags) {
 184                 ret = radeon_bo_set_tiling_flags(rbo,
 185                                                  tiling_flags | RADEON_TILING_SURFACE,
 186                                                  mode_cmd->pitches[0]);
 187                 if (ret)
 188                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 189         }
 190
 191
 192         ret = radeon_bo_reserve(rbo, false);
 193         if (unlikely(ret != 0))
 194                 goto out_unref;
 195         /* Only 27 bit offset for legacy CRTC */
 196         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 197                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 198                                        NULL);
 199         if (ret) {
 200                 radeon_bo_unreserve(rbo);
 201                 goto out_unref;
 202         }
 203         if (fb_tiled)
 204                 radeon_bo_check_tiling(rbo, 0, 0);
 205         ret = radeon_bo_kmap(rbo, NULL);
 206         radeon_bo_unreserve(rbo);
 207         if (ret) {
 208                 goto out_unref;
 209         }
 210
 211         *gobj_p = gobj;
 212         return 0;
 213 out_unref:
 214         radeonfb_destroy_pinned_object(gobj);
 215         *gobj_p = NULL;
 216         return ret;
 217 }
 218
 219 static int radeonfb_create(struct drm_fb_helper *helper,
 220                            struct drm_fb_helper_surface_size *sizes)
 221 {
 222         struct radeon_fbdev *rfbdev =
 223                 container_of(helper, struct radeon_fbdev, helper);
 224         struct radeon_device *rdev = rfbdev->rdev;
 225         struct fb_info *info;
 226         struct drm_framebuffer *fb = NULL;
 227         struct drm_mode_fb_cmd2 mode_cmd;
 228         struct drm_gem_object *gobj = NULL;
 229         struct radeon_bo *rbo = NULL;
 230         struct device *device = &rdev->pdev->dev;
 231         int ret;
 232         unsigned long tmp;
 233
 234         mode_cmd.width = sizes->surface_width;
 235         mode_cmd.height = sizes->surface_height;
 236
 237         /* avivo can't scanout real 24bpp */
 238         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 239                 sizes->surface_bpp = 32;
 240
 241         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 242                                                           sizes->surface_depth);
 243
 244         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 245         if (ret) {
 246                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 247                 return ret;
 248         }
 249
 250         rbo = gem_to_radeon_bo(gobj);
 251
 252         /* okay we have an object now allocate the framebuffer */
 253         info = framebuffer_alloc(0, device);
 254         if (info == NULL) {
 255                 ret = -ENOMEM;
 256                 goto out_unref;
 257         }
 258
 259         info->par = rfbdev;
 260         info->skip_vt_switch = true;
 261
 262         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 263         if (ret) {
 264                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 265                 goto out_unref;
 266         }
 267
 268         fb = &rfbdev->rfb.base;
 269
 270         /* setup helper */
 271         rfbdev->helper.fb = fb;
 272         rfbdev->helper.fbdev = info;
 273
 274         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 275
 276         strcpy(info->fix.id, "radeondrmfb");
 277
 278         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 279
 280         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 281         info->fbops = &radeonfb_ops;
 282
 283         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 284         info->fix.smem_start = rdev->mc.aper_base + tmp;
 285         info->fix.smem_len = radeon_bo_size(rbo);
 286         info->screen_base = rbo->kptr;
 287         info->screen_size = radeon_bo_size(rbo);
 288
 289         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 290
 291         /* setup aperture base/size for vesafb takeover */
 292         info->apertures = alloc_apertures(1);
 293         if (!info->apertures) {
 294                 ret = -ENOMEM;
 295                 goto out_unref;
 296         }
 297         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 298         info->apertures->ranges[0].size = rdev->mc.aper_size;
 299
 300         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 301
 302         if (info->screen_base == NULL) {
 303                 ret = -ENOSPC;
 304                 goto out_unref;
 305         }
 306
 307         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 308         if (ret) {
 309                 ret = -ENOMEM;
 310                 goto out_unref;
 311         }
 312
 313         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 314         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 315         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 316         DRM_INFO("fb depth is %d\n", fb->depth);
 317         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 318
 319         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 320         return 0;
 321
 322 out_unref:
 323         if (rbo) {
 324
 325         }
 326         if (fb && ret) {
 327                 drm_gem_object_unreference(gobj);
 328                 drm_framebuffer_unregister_private(fb);
 329                 drm_framebuffer_cleanup(fb);
 330                 kfree(fb);
 331         }
 332         return ret;
 333 }
 334
 335 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 336 {
 337         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 338 }
 339
 340 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 341 {
 342         struct fb_info *info;
 343         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 344
 345         if (rfbdev->helper.fbdev) {
 346                 info = rfbdev->helper.fbdev;
 347
 348                 unregister_framebuffer(info);
 349                 if (info->cmap.len)
 350                         fb_dealloc_cmap(&info->cmap);
 351                 framebuffer_release(info);
 352         }
 353
 354         if (rfb->obj) {
 355                 radeonfb_destroy_pinned_object(rfb->obj);
 356                 rfb->obj = NULL;
 357         }
 358         drm_fb_helper_fini(&rfbdev->helper);
 359         drm_framebuffer_unregister_private(&rfb->base);
 360         drm_framebuffer_cleanup(&rfb->base);
 361
 362         return 0;
 363 }
 364
 365 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 366         .gamma_set = radeon_crtc_fb_gamma_set,
 367         .gamma_get = radeon_crtc_fb_gamma_get,
 368         .fb_probe = radeonfb_create,
 369 };
 370
 371 int radeon_fbdev_init(struct radeon_device *rdev)
 372 {
 373         struct radeon_fbdev *rfbdev;
 374         int bpp_sel = 32;
 375         int ret;
 376
 377         /* select 8 bpp console on RN50 or 16MB cards */
 378         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 379                 bpp_sel = 8;
 380
 381         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 382         if (!rfbdev)
 383                 return -ENOMEM;
 384
 385         rfbdev->rdev = rdev;
 386         rdev->mode_info.rfbdev = rfbdev;
 387
 388         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 389                               &radeon_fb_helper_funcs);
 390
 391         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 392                                  rdev->num_crtc,
 393                                  RADEONFB_CONN_LIMIT);
 394         if (ret)
 395                 goto free;
 396
 397         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 398         if (ret)
 399                 goto fini;
 400
 401         /* disable all the possible outputs/crtcs before entering KMS mode */
 402         drm_helper_disable_unused_functions(rdev->ddev);
 403
 404         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 405         if (ret)
 406                 goto fini;
 407
 408         return 0;
 409
 410 fini:
 411         drm_fb_helper_fini(&rfbdev->helper);
 412 free:
 413         kfree(rfbdev);
 414         return ret;
 415 }
 416
 417 void radeon_fbdev_fini(struct radeon_device *rdev)
 418 {
 419         if (!rdev->mode_info.rfbdev)
 420                 return;
 421
 422         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 423         kfree(rdev->mode_info.rfbdev);
 424         rdev->mode_info.rfbdev = NULL;
 425 }
 426
 427 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 428 {
 429         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 430 }
 431
 432 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 433 {
 434         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 435                 return true;
 436         return false;
 437 }
 438
 439 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 440 {
 441         drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 442 }
 443
 444 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 445 {
 446         drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 447 }