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