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