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 static 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 = gobj->driver_private;
  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_cmd *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
 117         /* need to align pitch with crtc limits */
 118         mode_cmd->pitch = radeon_align_pitch(rdev, mode_cmd->width, mode_cmd->bpp, fb_tiled) * ((mode_cmd->bpp + 1) / 8);
 119
 120         size = mode_cmd->pitch * mode_cmd->height;
 121         aligned_size = ALIGN(size, PAGE_SIZE);
 122         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 123                                        RADEON_GEM_DOMAIN_VRAM,
 124                                        false, true,
 125                                        &gobj);
 126         if (ret) {
 127                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 128                        aligned_size);
 129                 return -ENOMEM;
 130         }
 131         rbo = gobj->driver_private;
 132
 133         if (fb_tiled)
 134                 tiling_flags = RADEON_TILING_MACRO;
 135
 136 #ifdef __BIG_ENDIAN
 137         switch (mode_cmd->bpp) {
 138         case 32:
 139                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 140                 break;
 141         case 16:
 142                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 143         default:
 144                 break;
 145         }
 146 #endif
 147
 148         if (tiling_flags) {
 149                 ret = radeon_bo_set_tiling_flags(rbo,
 150                                                  tiling_flags | RADEON_TILING_SURFACE,
 151                                                  mode_cmd->pitch);
 152                 if (ret)
 153                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 154         }
 155
 156
 157         ret = radeon_bo_reserve(rbo, false);
 158         if (unlikely(ret != 0))
 159                 goto out_unref;
 160         ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);
 161         if (ret) {
 162                 radeon_bo_unreserve(rbo);
 163                 goto out_unref;
 164         }
 165         if (fb_tiled)
 166                 radeon_bo_check_tiling(rbo, 0, 0);
 167         ret = radeon_bo_kmap(rbo, NULL);
 168         radeon_bo_unreserve(rbo);
 169         if (ret) {
 170                 goto out_unref;
 171         }
 172
 173         *gobj_p = gobj;
 174         return 0;
 175 out_unref:
 176         radeonfb_destroy_pinned_object(gobj);
 177         *gobj_p = NULL;
 178         return ret;
 179 }
 180
 181 static int radeonfb_create(struct radeon_fbdev *rfbdev,
 182                            struct drm_fb_helper_surface_size *sizes)
 183 {
 184         struct radeon_device *rdev = rfbdev->rdev;
 185         struct fb_info *info;
 186         struct drm_framebuffer *fb = NULL;
 187         struct drm_mode_fb_cmd mode_cmd;
 188         struct drm_gem_object *gobj = NULL;
 189         struct radeon_bo *rbo = NULL;
 190         struct device *device = &rdev->pdev->dev;
 191         int ret;
 192         unsigned long tmp;
 193
 194         mode_cmd.width = sizes->surface_width;
 195         mode_cmd.height = sizes->surface_height;
 196
 197         /* avivo can't scanout real 24bpp */
 198         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 199                 sizes->surface_bpp = 32;
 200
 201         mode_cmd.bpp = sizes->surface_bpp;
 202         mode_cmd.depth = sizes->surface_depth;
 203
 204         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 205         rbo = gobj->driver_private;
 206
 207         /* okay we have an object now allocate the framebuffer */
 208         info = framebuffer_alloc(0, device);
 209         if (info == NULL) {
 210                 ret = -ENOMEM;
 211                 goto out_unref;
 212         }
 213
 214         info->par = rfbdev;
 215
 216         radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 217
 218         fb = &rfbdev->rfb.base;
 219
 220         /* setup helper */
 221         rfbdev->helper.fb = fb;
 222         rfbdev->helper.fbdev = info;
 223
 224         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 225
 226         strcpy(info->fix.id, "radeondrmfb");
 227
 228         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 229
 230         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 231         info->fbops = &radeonfb_ops;
 232
 233         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 234         info->fix.smem_start = rdev->mc.aper_base + tmp;
 235         info->fix.smem_len = radeon_bo_size(rbo);
 236         info->screen_base = rbo->kptr;
 237         info->screen_size = radeon_bo_size(rbo);
 238
 239         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 240
 241         /* setup aperture base/size for vesafb takeover */
 242         info->apertures = alloc_apertures(1);
 243         if (!info->apertures) {
 244                 ret = -ENOMEM;
 245                 goto out_unref;
 246         }
 247         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 248         info->apertures->ranges[0].size = rdev->mc.real_vram_size;
 249
 250         info->pixmap.size = 64*1024;
 251         info->pixmap.buf_align = 8;
 252         info->pixmap.access_align = 32;
 253         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 254         info->pixmap.scan_align = 1;
 255
 256         if (info->screen_base == NULL) {
 257                 ret = -ENOSPC;
 258                 goto out_unref;
 259         }
 260
 261         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 262         if (ret) {
 263                 ret = -ENOMEM;
 264                 goto out_unref;
 265         }
 266
 267         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 268         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 269         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 270         DRM_INFO("fb depth is %d\n", fb->depth);
 271         DRM_INFO("   pitch is %d\n", fb->pitch);
 272
 273         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 274         return 0;
 275
 276 out_unref:
 277         if (rbo) {
 278
 279         }
 280         if (fb && ret) {
 281                 drm_gem_object_unreference(gobj);
 282                 drm_framebuffer_cleanup(fb);
 283                 kfree(fb);
 284         }
 285         return ret;
 286 }
 287
 288 static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,
 289                                            struct drm_fb_helper_surface_size *sizes)
 290 {
 291         struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;
 292         int new_fb = 0;
 293         int ret;
 294
 295         if (!helper->fb) {
 296                 ret = radeonfb_create(rfbdev, sizes);
 297                 if (ret)
 298                         return ret;
 299                 new_fb = 1;
 300         }
 301         return new_fb;
 302 }
 303
 304 static char *mode_option;
 305 int radeon_parse_options(char *options)
 306 {
 307         char *this_opt;
 308
 309         if (!options || !*options)
 310                 return 0;
 311
 312         while ((this_opt = strsep(&options, ",")) != NULL) {
 313                 if (!*this_opt)
 314                         continue;
 315                 mode_option = this_opt;
 316         }
 317         return 0;
 318 }
 319
 320 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 321 {
 322         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 323 }
 324
 325 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 326 {
 327         struct fb_info *info;
 328         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 329
 330         if (rfbdev->helper.fbdev) {
 331                 info = rfbdev->helper.fbdev;
 332
 333                 unregister_framebuffer(info);
 334                 if (info->cmap.len)
 335                         fb_dealloc_cmap(&info->cmap);
 336                 framebuffer_release(info);
 337         }
 338
 339         if (rfb->obj) {
 340                 radeonfb_destroy_pinned_object(rfb->obj);
 341                 rfb->obj = NULL;
 342         }
 343         drm_fb_helper_fini(&rfbdev->helper);
 344         drm_framebuffer_cleanup(&rfb->base);
 345
 346         return 0;
 347 }
 348
 349 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 350         .gamma_set = radeon_crtc_fb_gamma_set,
 351         .gamma_get = radeon_crtc_fb_gamma_get,
 352         .fb_probe = radeon_fb_find_or_create_single,
 353 };
 354
 355 int radeon_fbdev_init(struct radeon_device *rdev)
 356 {
 357         struct radeon_fbdev *rfbdev;
 358         int bpp_sel = 32;
 359         int ret;
 360
 361         /* select 8 bpp console on RN50 or 16MB cards */
 362         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 363                 bpp_sel = 8;
 364
 365         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 366         if (!rfbdev)
 367                 return -ENOMEM;
 368
 369         rfbdev->rdev = rdev;
 370         rdev->mode_info.rfbdev = rfbdev;
 371         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 372
 373         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 374                                  rdev->num_crtc,
 375                                  RADEONFB_CONN_LIMIT);
 376         if (ret) {
 377                 kfree(rfbdev);
 378                 return ret;
 379         }
 380
 381         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 382         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 383         return 0;
 384 }
 385
 386 void radeon_fbdev_fini(struct radeon_device *rdev)
 387 {
 388         if (!rdev->mode_info.rfbdev)
 389                 return;
 390
 391         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 392         kfree(rdev->mode_info.rfbdev);
 393         rdev->mode_info.rfbdev = NULL;
 394 }
 395
 396 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 397 {
 398         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 399 }
 400
 401 int radeon_fbdev_total_size(struct radeon_device *rdev)
 402 {
 403         struct radeon_bo *robj;
 404         int size = 0;
 405
 406         robj = rdev->mode_info.rfbdev->rfb.obj->driver_private;
 407         size += radeon_bo_size(robj);
 408         return size;
 409 }
 410
 411 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 412 {
 413         if (robj == rdev->mode_info.rfbdev->rfb.obj->driver_private)
 414                 return true;
 415         return false;
 416 }