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