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 struct fb_ops radeonfb_ops = {
  49         .owner = THIS_MODULE,
  50         .fb_check_var = drm_fb_helper_check_var,
  51         .fb_set_par = drm_fb_helper_set_par,
  52         .fb_setcolreg = drm_fb_helper_setcolreg,
  53         .fb_fillrect = cfb_fillrect,
  54         .fb_copyarea = cfb_copyarea,
  55         .fb_imageblit = 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 };
  60
  61 /**
  62  * Curretly it is assumed that the old framebuffer is reused.
  63  *
  64  * LOCKING
  65  * caller should hold the mode config lock.
  66  *
  67  */
  68 int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
  69 {
  70         struct fb_info *info;
  71         struct drm_framebuffer *fb;
  72         struct drm_display_mode *mode = crtc->desired_mode;
  73
  74         fb = crtc->fb;
  75         if (fb == NULL) {
  76                 return 1;
  77         }
  78         info = fb->fbdev;
  79         if (info == NULL) {
  80                 return 1;
  81         }
  82         if (mode == NULL) {
  83                 return 1;
  84         }
  85         info->var.xres = mode->hdisplay;
  86         info->var.right_margin = mode->hsync_start - mode->hdisplay;
  87         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
  88         info->var.left_margin = mode->htotal - mode->hsync_end;
  89         info->var.yres = mode->vdisplay;
  90         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
  91         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
  92         info->var.upper_margin = mode->vtotal - mode->vsync_end;
  93         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
  94         /* avoid overflow */
  95         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
  96
  97         return 0;
  98 }
  99 EXPORT_SYMBOL(radeonfb_resize);
 100
 101 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 102 {
 103         int aligned = width;
 104         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 105         int pitch_mask = 0;
 106
 107         switch (bpp / 8) {
 108         case 1:
 109                 pitch_mask = align_large ? 255 : 127;
 110                 break;
 111         case 2:
 112                 pitch_mask = align_large ? 127 : 31;
 113                 break;
 114         case 3:
 115         case 4:
 116                 pitch_mask = align_large ? 63 : 15;
 117                 break;
 118         }
 119
 120         aligned += pitch_mask;
 121         aligned &= ~pitch_mask;
 122         return aligned;
 123 }
 124
 125 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 126         .gamma_set = radeon_crtc_fb_gamma_set,
 127 };
 128
 129 int radeonfb_create(struct drm_device *dev,
 130                     uint32_t fb_width, uint32_t fb_height,
 131                     uint32_t surface_width, uint32_t surface_height,
 132                     uint32_t surface_depth, uint32_t surface_bpp,
 133                     struct drm_framebuffer **fb_p)
 134 {
 135         struct radeon_device *rdev = dev->dev_private;
 136         struct fb_info *info;
 137         struct radeon_fb_device *rfbdev;
 138         struct drm_framebuffer *fb = NULL;
 139         struct radeon_framebuffer *rfb;
 140         struct drm_mode_fb_cmd mode_cmd;
 141         struct drm_gem_object *gobj = NULL;
 142         struct radeon_object *robj = NULL;
 143         struct device *device = &rdev->pdev->dev;
 144         int size, aligned_size, ret;
 145         u64 fb_gpuaddr;
 146         void *fbptr = NULL;
 147         unsigned long tmp;
 148         bool fb_tiled = false; /* useful for testing */
 149         u32 tiling_flags = 0;
 150         int crtc_count;
 151
 152         mode_cmd.width = surface_width;
 153         mode_cmd.height = surface_height;
 154         mode_cmd.bpp = surface_bpp;
 155         /* need to align pitch with crtc limits */
 156         mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
 157         mode_cmd.depth = surface_depth;
 158
 159         size = mode_cmd.pitch * mode_cmd.height;
 160         aligned_size = ALIGN(size, PAGE_SIZE);
 161
 162         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 163                         RADEON_GEM_DOMAIN_VRAM,
 164                         false, ttm_bo_type_kernel,
 165                         false, &gobj);
 166         if (ret) {
 167                 printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
 168                        surface_width, surface_height);
 169                 ret = -ENOMEM;
 170                 goto out;
 171         }
 172         robj = gobj->driver_private;
 173
 174         if (fb_tiled)
 175                 tiling_flags = RADEON_TILING_MACRO;
 176
 177 #ifdef __BIG_ENDIAN
 178         switch (mode_cmd.bpp) {
 179         case 32:
 180                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 181                 break;
 182         case 16:
 183                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 184         default:
 185                 break;
 186         }
 187 #endif
 188
 189         if (tiling_flags)
 190                 radeon_object_set_tiling_flags(robj, tiling_flags | RADEON_TILING_SURFACE, mode_cmd.pitch);
 191         mutex_lock(&rdev->ddev->struct_mutex);
 192         fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
 193         if (fb == NULL) {
 194                 DRM_ERROR("failed to allocate fb.\n");
 195                 ret = -ENOMEM;
 196                 goto out_unref;
 197         }
 198         ret = radeon_object_pin(robj, RADEON_GEM_DOMAIN_VRAM, &fb_gpuaddr);
 199         if (ret) {
 200                 printk(KERN_ERR "failed to pin framebuffer\n");
 201                 ret = -ENOMEM;
 202                 goto out_unref;
 203         }
 204
 205         list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
 206
 207         *fb_p = fb;
 208         rfb = to_radeon_framebuffer(fb);
 209         rdev->fbdev_rfb = rfb;
 210         rdev->fbdev_robj = robj;
 211
 212         info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
 213         if (info == NULL) {
 214                 ret = -ENOMEM;
 215                 goto out_unref;
 216         }
 217
 218         rdev->fbdev_info = info;
 219         rfbdev = info->par;
 220         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 221         rfbdev->helper.dev = dev;
 222         if (rdev->flags & RADEON_SINGLE_CRTC)
 223                 crtc_count = 1;
 224         else
 225                 crtc_count = 2;
 226         ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, crtc_count,
 227                                             RADEONFB_CONN_LIMIT);
 228         if (ret)
 229                 goto out_unref;
 230
 231         if (fb_tiled)
 232                 radeon_object_check_tiling(robj, 0, 0);
 233
 234         ret = radeon_object_kmap(robj, &fbptr);
 235         if (ret) {
 236                 goto out_unref;
 237         }
 238
 239         memset_io(fbptr, 0, aligned_size);
 240
 241         strcpy(info->fix.id, "radeondrmfb");
 242
 243         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 244
 245         info->flags = FBINFO_DEFAULT;
 246         info->fbops = &radeonfb_ops;
 247
 248         tmp = fb_gpuaddr - rdev->mc.vram_location;
 249         info->fix.smem_start = rdev->mc.aper_base + tmp;
 250         info->fix.smem_len = size;
 251         info->screen_base = fbptr;
 252         info->screen_size = size;
 253
 254         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 255
 256         /* setup aperture base/size for vesafb takeover */
 257         info->aperture_base = rdev->ddev->mode_config.fb_base;
 258         info->aperture_size = rdev->mc.real_vram_size;
 259
 260         info->fix.mmio_start = 0;
 261         info->fix.mmio_len = 0;
 262         info->pixmap.size = 64*1024;
 263         info->pixmap.buf_align = 8;
 264         info->pixmap.access_align = 32;
 265         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 266         info->pixmap.scan_align = 1;
 267         if (info->screen_base == NULL) {
 268                 ret = -ENOSPC;
 269                 goto out_unref;
 270         }
 271         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 272         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 273         DRM_INFO("size %lu\n", (unsigned long)size);
 274         DRM_INFO("fb depth is %d\n", fb->depth);
 275         DRM_INFO("   pitch is %d\n", fb->pitch);
 276
 277         fb->fbdev = info;
 278         rfbdev->rfb = rfb;
 279         rfbdev->rdev = rdev;
 280
 281         mutex_unlock(&rdev->ddev->struct_mutex);
 282         return 0;
 283
 284 out_unref:
 285         if (robj) {
 286                 radeon_object_kunmap(robj);
 287         }
 288         if (fb && ret) {
 289                 list_del(&fb->filp_head);
 290                 drm_gem_object_unreference(gobj);
 291                 drm_framebuffer_cleanup(fb);
 292                 kfree(fb);
 293         }
 294         drm_gem_object_unreference(gobj);
 295         mutex_unlock(&rdev->ddev->struct_mutex);
 296 out:
 297         return ret;
 298 }
 299
 300 static char *mode_option;
 301 int radeon_parse_options(char *options)
 302 {
 303         char *this_opt;
 304
 305         if (!options || !*options)
 306                 return 0;
 307
 308         while ((this_opt = strsep(&options, ",")) != NULL) {
 309                 if (!*this_opt)
 310                         continue;
 311                 mode_option = this_opt;
 312         }
 313         return 0;
 314 }
 315
 316 int radeonfb_probe(struct drm_device *dev)
 317 {
 318         return drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
 319 }
 320
 321 int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 322 {
 323         struct fb_info *info;
 324         struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
 325         struct radeon_object *robj;
 326
 327         if (!fb) {
 328                 return -EINVAL;
 329         }
 330         info = fb->fbdev;
 331         if (info) {
 332                 struct radeon_fb_device *rfbdev = info->par;
 333                 robj = rfb->obj->driver_private;
 334                 unregister_framebuffer(info);
 335                 radeon_object_kunmap(robj);
 336                 radeon_object_unpin(robj);
 337                 drm_fb_helper_free(&rfbdev->helper);
 338                 framebuffer_release(info);
 339         }
 340
 341         printk(KERN_INFO "unregistered panic notifier\n");
 342
 343         return 0;
 344 }
 345 EXPORT_SYMBOL(radeonfb_remove);
 346 MODULE_LICENSE("GPL");