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     /*
  27      *  Modularization
  28      */
  29
  30 #include <linux/module.h>
  31 #include <linux/fb.h>
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "drm_crtc.h"
  36 #include "drm_crtc_helper.h"
  37 #include "radeon_drm.h"
  38 #include "radeon.h"
  39
  40 #include "drm_fb_helper.h"
  41
  42 struct radeon_fb_device {
  43         struct drm_fb_helper helper;
  44         struct radeon_framebuffer       *rfb;
  45         struct radeon_device            *rdev;
  46 };
  47
  48 static int radeon_fb_check_var(struct fb_var_screeninfo *var,
  49                                struct fb_info *info)
  50 {
  51         int ret;
  52         ret = drm_fb_helper_check_var(var, info);
  53         if (ret)
  54                 return ret;
  55
  56         /* big endian override for radeon endian workaround */
  57 #ifdef __BIG_ENDIAN
  58         {
  59                 int depth;
  60                 switch (var->bits_per_pixel) {
  61                 case 16:
  62                         depth = (var->green.length == 6) ? 16 : 15;
  63                         break;
  64                 case 32:
  65                         depth = (var->transp.length > 0) ? 32 : 24;
  66                         break;
  67                 default:
  68                         depth = var->bits_per_pixel;
  69                         break;
  70                 }
  71                 switch (depth) {
  72                 case 8:
  73                         var->red.offset = 0;
  74                         var->green.offset = 0;
  75                         var->blue.offset = 0;
  76                         var->red.length = 8;
  77                         var->green.length = 8;
  78                         var->blue.length = 8;
  79                         var->transp.length = 0;
  80                         var->transp.offset = 0;
  81                         break;
  82                 case 24:
  83                         var->red.offset = 8;
  84                         var->green.offset = 16;
  85                         var->blue.offset = 24;
  86                         var->red.length = 8;
  87                         var->green.length = 8;
  88                         var->blue.length = 8;
  89                         var->transp.length = 0;
  90                         var->transp.offset = 0;
  91                         break;
  92                 case 32:
  93                         var->red.offset = 8;
  94                         var->green.offset = 16;
  95                         var->blue.offset = 24;
  96                         var->red.length = 8;
  97                         var->green.length = 8;
  98                         var->blue.length = 8;
  99                         var->transp.length = 8;
 100                         var->transp.offset = 0;
 101                         break;
 102                 default:
 103                         return -EINVAL;
 104                 }
 105         }
 106 #endif
 107         return 0;
 108 }
 109
 110 static struct fb_ops radeonfb_ops = {
 111         .owner = THIS_MODULE,
 112         .fb_check_var = radeon_fb_check_var,
 113         .fb_set_par = drm_fb_helper_set_par,
 114         .fb_setcolreg = drm_fb_helper_setcolreg,
 115         .fb_fillrect = cfb_fillrect,
 116         .fb_copyarea = cfb_copyarea,
 117         .fb_imageblit = cfb_imageblit,
 118         .fb_pan_display = drm_fb_helper_pan_display,
 119         .fb_blank = drm_fb_helper_blank,
 120 };
 121
 122 /**
 123  * Curretly it is assumed that the old framebuffer is reused.
 124  *
 125  * LOCKING
 126  * caller should hold the mode config lock.
 127  *
 128  */
 129 int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
 130 {
 131         struct fb_info *info;
 132         struct drm_framebuffer *fb;
 133         struct drm_display_mode *mode = crtc->desired_mode;
 134
 135         fb = crtc->fb;
 136         if (fb == NULL) {
 137                 return 1;
 138         }
 139         info = fb->fbdev;
 140         if (info == NULL) {
 141                 return 1;
 142         }
 143         if (mode == NULL) {
 144                 return 1;
 145         }
 146         info->var.xres = mode->hdisplay;
 147         info->var.right_margin = mode->hsync_start - mode->hdisplay;
 148         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
 149         info->var.left_margin = mode->htotal - mode->hsync_end;
 150         info->var.yres = mode->vdisplay;
 151         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
 152         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
 153         info->var.upper_margin = mode->vtotal - mode->vsync_end;
 154         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
 155         /* avoid overflow */
 156         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
 157
 158         return 0;
 159 }
 160 EXPORT_SYMBOL(radeonfb_resize);
 161
 162 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 163 {
 164         int aligned = width;
 165         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 166         int pitch_mask = 0;
 167
 168         switch (bpp / 8) {
 169         case 1:
 170                 pitch_mask = align_large ? 255 : 127;
 171                 break;
 172         case 2:
 173                 pitch_mask = align_large ? 127 : 31;
 174                 break;
 175         case 3:
 176         case 4:
 177                 pitch_mask = align_large ? 63 : 15;
 178                 break;
 179         }
 180
 181         aligned += pitch_mask;
 182         aligned &= ~pitch_mask;
 183         return aligned;
 184 }
 185
 186 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 187         .gamma_set = radeon_crtc_fb_gamma_set,
 188 };
 189
 190 int radeonfb_create(struct drm_device *dev,
 191                     uint32_t fb_width, uint32_t fb_height,
 192                     uint32_t surface_width, uint32_t surface_height,
 193                     struct drm_framebuffer **fb_p)
 194 {
 195         struct radeon_device *rdev = dev->dev_private;
 196         struct fb_info *info;
 197         struct radeon_fb_device *rfbdev;
 198         struct drm_framebuffer *fb = NULL;
 199         struct radeon_framebuffer *rfb;
 200         struct drm_mode_fb_cmd mode_cmd;
 201         struct drm_gem_object *gobj = NULL;
 202         struct radeon_object *robj = NULL;
 203         struct device *device = &rdev->pdev->dev;
 204         int size, aligned_size, ret;
 205         u64 fb_gpuaddr;
 206         void *fbptr = NULL;
 207         unsigned long tmp;
 208         bool fb_tiled = false; /* useful for testing */
 209
 210         mode_cmd.width = surface_width;
 211         mode_cmd.height = surface_height;
 212         mode_cmd.bpp = 32;
 213         /* need to align pitch with crtc limits */
 214         mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
 215         mode_cmd.depth = 24;
 216
 217         size = mode_cmd.pitch * mode_cmd.height;
 218         aligned_size = ALIGN(size, PAGE_SIZE);
 219
 220         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 221                         RADEON_GEM_DOMAIN_VRAM,
 222                         false, ttm_bo_type_kernel,
 223                         false, &gobj);
 224         if (ret) {
 225                 printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
 226                        surface_width, surface_height);
 227                 ret = -ENOMEM;
 228                 goto out;
 229         }
 230         robj = gobj->driver_private;
 231
 232         if (fb_tiled)
 233                 radeon_object_set_tiling_flags(robj, RADEON_TILING_MACRO|RADEON_TILING_SURFACE, mode_cmd.pitch);
 234         mutex_lock(&rdev->ddev->struct_mutex);
 235         fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
 236         if (fb == NULL) {
 237                 DRM_ERROR("failed to allocate fb.\n");
 238                 ret = -ENOMEM;
 239                 goto out_unref;
 240         }
 241         ret = radeon_object_pin(robj, RADEON_GEM_DOMAIN_VRAM, &fb_gpuaddr);
 242         if (ret) {
 243                 printk(KERN_ERR "failed to pin framebuffer\n");
 244                 ret = -ENOMEM;
 245                 goto out_unref;
 246         }
 247
 248         list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
 249
 250         *fb_p = fb;
 251         rfb = to_radeon_framebuffer(fb);
 252         rdev->fbdev_rfb = rfb;
 253         rdev->fbdev_robj = robj;
 254
 255         info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
 256         if (info == NULL) {
 257                 ret = -ENOMEM;
 258                 goto out_unref;
 259         }
 260
 261         rfbdev = info->par;
 262         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 263         rfbdev->helper.dev = dev;
 264         ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, 2,
 265                                             RADEONFB_CONN_LIMIT);
 266         if (ret)
 267                 goto out_unref;
 268
 269         if (fb_tiled)
 270                 radeon_object_check_tiling(robj, 0, 0);
 271
 272         ret = radeon_object_kmap(robj, &fbptr);
 273         if (ret) {
 274                 goto out_unref;
 275         }
 276
 277         memset_io(fbptr, 0, aligned_size);
 278
 279         strcpy(info->fix.id, "radeondrmfb");
 280
 281         drm_fb_helper_fill_fix(info, fb->pitch);
 282
 283         info->flags = FBINFO_DEFAULT;
 284         info->fbops = &radeonfb_ops;
 285
 286         tmp = fb_gpuaddr - rdev->mc.vram_location;
 287         info->fix.smem_start = rdev->mc.aper_base + tmp;
 288         info->fix.smem_len = size;
 289         info->screen_base = fbptr;
 290         info->screen_size = size;
 291
 292         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 293
 294         /* setup aperture base/size for vesafb takeover */
 295         info->aperture_base = rdev->ddev->mode_config.fb_base;
 296         info->aperture_size = rdev->mc.real_vram_size;
 297
 298         info->fix.mmio_start = 0;
 299         info->fix.mmio_len = 0;
 300         info->pixmap.size = 64*1024;
 301         info->pixmap.buf_align = 8;
 302         info->pixmap.access_align = 32;
 303         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 304         info->pixmap.scan_align = 1;
 305         if (info->screen_base == NULL) {
 306                 ret = -ENOSPC;
 307                 goto out_unref;
 308         }
 309         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 310         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 311         DRM_INFO("size %lu\n", (unsigned long)size);
 312         DRM_INFO("fb depth is %d\n", fb->depth);
 313         DRM_INFO("   pitch is %d\n", fb->pitch);
 314
 315 #ifdef __BIG_ENDIAN
 316         /* fill var sets defaults for this stuff - override
 317            on big endian */
 318         switch (fb->depth) {
 319         case 8:
 320                 info->var.red.offset = 0;
 321                 info->var.green.offset = 0;
 322                 info->var.blue.offset = 0;
 323                 info->var.red.length = 8; /* 8bit DAC */
 324                 info->var.green.length = 8;
 325                 info->var.blue.length = 8;
 326                 info->var.transp.offset = 0;
 327                 info->var.transp.length = 0;
 328                 break;
 329         case 24:
 330                 info->var.red.offset = 8;
 331                 info->var.green.offset = 16;
 332                 info->var.blue.offset = 24;
 333                 info->var.red.length = 8;
 334                 info->var.green.length = 8;
 335                 info->var.blue.length = 8;
 336                 info->var.transp.offset = 0;
 337                 info->var.transp.length = 0;
 338                 break;
 339         case 32:
 340                 info->var.red.offset = 8;
 341                 info->var.green.offset = 16;
 342                 info->var.blue.offset = 24;
 343                 info->var.red.length = 8;
 344                 info->var.green.length = 8;
 345                 info->var.blue.length = 8;
 346                 info->var.transp.offset = 0;
 347                 info->var.transp.length = 8;
 348                 break;
 349         default:
 350                 break;
 351         }
 352 #endif
 353
 354         fb->fbdev = info;
 355         rfbdev->rfb = rfb;
 356         rfbdev->rdev = rdev;
 357
 358         mutex_unlock(&rdev->ddev->struct_mutex);
 359         return 0;
 360
 361 out_unref:
 362         if (robj) {
 363                 radeon_object_kunmap(robj);
 364         }
 365         if (fb && ret) {
 366                 list_del(&fb->filp_head);
 367                 drm_gem_object_unreference(gobj);
 368                 drm_framebuffer_cleanup(fb);
 369                 kfree(fb);
 370         }
 371         drm_gem_object_unreference(gobj);
 372         mutex_unlock(&rdev->ddev->struct_mutex);
 373 out:
 374         return ret;
 375 }
 376
 377 int radeonfb_probe(struct drm_device *dev)
 378 {
 379         int ret;
 380         ret = drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
 381         return ret;
 382 }
 383 EXPORT_SYMBOL(radeonfb_probe);
 384
 385 int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 386 {
 387         struct fb_info *info;
 388         struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
 389         struct radeon_object *robj;
 390
 391         if (!fb) {
 392                 return -EINVAL;
 393         }
 394         info = fb->fbdev;
 395         if (info) {
 396                 struct radeon_fb_device *rfbdev = info->par;
 397                 robj = rfb->obj->driver_private;
 398                 unregister_framebuffer(info);
 399                 radeon_object_kunmap(robj);
 400                 radeon_object_unpin(robj);
 401                 drm_fb_helper_free(&rfbdev->helper);
 402                 framebuffer_release(info);
 403         }
 404
 405         printk(KERN_INFO "unregistered panic notifier\n");
 406
 407         return 0;
 408 }
 409 EXPORT_SYMBOL(radeonfb_remove);
 410 MODULE_LICENSE("GPL");