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 };
  63
  64
  65 static 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 = gobj->driver_private;
  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_handle_unreference(gobj);
 101         drm_gem_object_unreference_unlocked(gobj);
 102 }
 103
 104 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 105                                          struct drm_mode_fb_cmd *mode_cmd,
 106                                          struct drm_gem_object **gobj_p)
 107 {
 108         struct radeon_device *rdev = rfbdev->rdev;
 109         struct drm_gem_object *gobj = NULL;
 110         struct radeon_bo *rbo = NULL;
 111         bool fb_tiled = false; /* useful for testing */
 112         u32 tiling_flags = 0;
 113         int ret;
 114         int aligned_size, size;
 115
 116         /* need to align pitch with crtc limits */
 117         mode_cmd->pitch = radeon_align_pitch(rdev, mode_cmd->width, mode_cmd->bpp, fb_tiled) * ((mode_cmd->bpp + 1) / 8);
 118
 119         size = mode_cmd->pitch * mode_cmd->height;
 120         aligned_size = ALIGN(size, PAGE_SIZE);
 121         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 122                                        RADEON_GEM_DOMAIN_VRAM,
 123                                        false, true,
 124                                        &gobj);
 125         if (ret) {
 126                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 127                        aligned_size);
 128                 return -ENOMEM;
 129         }
 130         rbo = gobj->driver_private;
 131
 132         if (fb_tiled)
 133                 tiling_flags = RADEON_TILING_MACRO;
 134
 135 #ifdef __BIG_ENDIAN
 136         switch (mode_cmd->bpp) {
 137         case 32:
 138                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 139                 break;
 140         case 16:
 141                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 142         default:
 143                 break;
 144         }
 145 #endif
 146
 147         if (tiling_flags) {
 148                 ret = radeon_bo_set_tiling_flags(rbo,
 149                                                  tiling_flags | RADEON_TILING_SURFACE,
 150                                                  mode_cmd->pitch);
 151                 if (ret)
 152                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 153         }
 154
 155
 156         ret = radeon_bo_reserve(rbo, false);
 157         if (unlikely(ret != 0))
 158                 goto out_unref;
 159         ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);
 160         if (ret) {
 161                 radeon_bo_unreserve(rbo);
 162                 goto out_unref;
 163         }
 164         if (fb_tiled)
 165                 radeon_bo_check_tiling(rbo, 0, 0);
 166         ret = radeon_bo_kmap(rbo, NULL);
 167         radeon_bo_unreserve(rbo);
 168         if (ret) {
 169                 goto out_unref;
 170         }
 171
 172         *gobj_p = gobj;
 173         return 0;
 174 out_unref:
 175         radeonfb_destroy_pinned_object(gobj);
 176         *gobj_p = NULL;
 177         return ret;
 178 }
 179
 180 static int radeonfb_create(struct radeon_fbdev *rfbdev,
 181                            struct drm_fb_helper_surface_size *sizes)
 182 {
 183         struct radeon_device *rdev = rfbdev->rdev;
 184         struct fb_info *info;
 185         struct drm_framebuffer *fb = NULL;
 186         struct drm_mode_fb_cmd mode_cmd;
 187         struct drm_gem_object *gobj = NULL;
 188         struct radeon_bo *rbo = NULL;
 189         struct device *device = &rdev->pdev->dev;
 190         int ret;
 191         unsigned long tmp;
 192
 193         mode_cmd.width = sizes->surface_width;
 194         mode_cmd.height = sizes->surface_height;
 195
 196         /* avivo can't scanout real 24bpp */
 197         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 198                 sizes->surface_bpp = 32;
 199
 200         mode_cmd.bpp = sizes->surface_bpp;
 201         mode_cmd.depth = sizes->surface_depth;
 202
 203         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 204         rbo = gobj->driver_private;
 205
 206         /* okay we have an object now allocate the framebuffer */
 207         info = framebuffer_alloc(0, device);
 208         if (info == NULL) {
 209                 ret = -ENOMEM;
 210                 goto out_unref;
 211         }
 212
 213         info->par = rfbdev;
 214
 215         radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 216
 217         fb = &rfbdev->rfb.base;
 218
 219         /* setup helper */
 220         rfbdev->helper.fb = fb;
 221         rfbdev->helper.fbdev = info;
 222
 223         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 224
 225         strcpy(info->fix.id, "radeondrmfb");
 226
 227         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 228
 229         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 230         info->fbops = &radeonfb_ops;
 231
 232         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 233         info->fix.smem_start = rdev->mc.aper_base + tmp;
 234         info->fix.smem_len = radeon_bo_size(rbo);
 235         info->screen_base = rbo->kptr;
 236         info->screen_size = radeon_bo_size(rbo);
 237
 238         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 239
 240         /* setup aperture base/size for vesafb takeover */
 241         info->apertures = alloc_apertures(1);
 242         if (!info->apertures) {
 243                 ret = -ENOMEM;
 244                 goto out_unref;
 245         }
 246         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 247         info->apertures->ranges[0].size = rdev->mc.real_vram_size;
 248
 249         info->fix.mmio_start = 0;
 250         info->fix.mmio_len = 0;
 251         info->pixmap.size = 64*1024;
 252         info->pixmap.buf_align = 8;
 253         info->pixmap.access_align = 32;
 254         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 255         info->pixmap.scan_align = 1;
 256
 257         if (info->screen_base == NULL) {
 258                 ret = -ENOSPC;
 259                 goto out_unref;
 260         }
 261
 262         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 263         if (ret) {
 264                 ret = -ENOMEM;
 265                 goto out_unref;
 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->pitch);
 273
 274         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 275         return 0;
 276
 277 out_unref:
 278         if (rbo) {
 279
 280         }
 281         if (fb && ret) {
 282                 drm_gem_object_unreference(gobj);
 283                 drm_framebuffer_cleanup(fb);
 284                 kfree(fb);
 285         }
 286         return ret;
 287 }
 288
 289 static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,
 290                                            struct drm_fb_helper_surface_size *sizes)
 291 {
 292         struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;
 293         int new_fb = 0;
 294         int ret;
 295
 296         if (!helper->fb) {
 297                 ret = radeonfb_create(rfbdev, sizes);
 298                 if (ret)
 299                         return ret;
 300                 new_fb = 1;
 301         }
 302         return new_fb;
 303 }
 304
 305 static char *mode_option;
 306 int radeon_parse_options(char *options)
 307 {
 308         char *this_opt;
 309
 310         if (!options || !*options)
 311                 return 0;
 312
 313         while ((this_opt = strsep(&options, ",")) != NULL) {
 314                 if (!*this_opt)
 315                         continue;
 316                 mode_option = this_opt;
 317         }
 318         return 0;
 319 }
 320
 321 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 322 {
 323         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 324 }
 325
 326 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 327 {
 328         struct fb_info *info;
 329         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 330
 331         if (rfbdev->helper.fbdev) {
 332                 info = rfbdev->helper.fbdev;
 333
 334                 unregister_framebuffer(info);
 335                 if (info->cmap.len)
 336                         fb_dealloc_cmap(&info->cmap);
 337                 framebuffer_release(info);
 338         }
 339
 340         if (rfb->obj) {
 341                 radeonfb_destroy_pinned_object(rfb->obj);
 342                 rfb->obj = NULL;
 343         }
 344         drm_fb_helper_fini(&rfbdev->helper);
 345         drm_framebuffer_cleanup(&rfb->base);
 346
 347         return 0;
 348 }
 349
 350 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 351         .gamma_set = radeon_crtc_fb_gamma_set,
 352         .gamma_get = radeon_crtc_fb_gamma_get,
 353         .fb_probe = radeon_fb_find_or_create_single,
 354 };
 355
 356 int radeon_fbdev_init(struct radeon_device *rdev)
 357 {
 358         struct radeon_fbdev *rfbdev;
 359         int bpp_sel = 32;
 360         int ret;
 361
 362         /* select 8 bpp console on RN50 or 16MB cards */
 363         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 364                 bpp_sel = 8;
 365
 366         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 367         if (!rfbdev)
 368                 return -ENOMEM;
 369
 370         rfbdev->rdev = rdev;
 371         rdev->mode_info.rfbdev = rfbdev;
 372         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 373
 374         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 375                                  rdev->num_crtc,
 376                                  RADEONFB_CONN_LIMIT);
 377         if (ret) {
 378                 kfree(rfbdev);
 379                 return ret;
 380         }
 381
 382         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 383         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 384         return 0;
 385 }
 386
 387 void radeon_fbdev_fini(struct radeon_device *rdev)
 388 {
 389         if (!rdev->mode_info.rfbdev)
 390                 return;
 391
 392         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 393         kfree(rdev->mode_info.rfbdev);
 394         rdev->mode_info.rfbdev = NULL;
 395 }
 396
 397 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 398 {
 399         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 400 }
 401
 402 int radeon_fbdev_total_size(struct radeon_device *rdev)
 403 {
 404         struct radeon_bo *robj;
 405         int size = 0;
 406
 407         robj = rdev->mode_info.rfbdev->rfb.obj->driver_private;
 408         size += radeon_bo_size(robj);
 409         return size;
 410 }
 411
 412 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 413 {
 414         if (robj == rdev->mode_info.rfbdev->rfb.obj->driver_private)
 415                 return true;
 416         return false;
 417 }