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 };
  59
  60 /**
  61  * Curretly it is assumed that the old framebuffer is reused.
  62  *
  63  * LOCKING
  64  * caller should hold the mode config lock.
  65  *
  66  */
  67 int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
  68 {
  69         struct fb_info *info;
  70         struct drm_framebuffer *fb;
  71         struct drm_display_mode *mode = crtc->desired_mode;
  72
  73         fb = crtc->fb;
  74         if (fb == NULL) {
  75                 return 1;
  76         }
  77         info = fb->fbdev;
  78         if (info == NULL) {
  79                 return 1;
  80         }
  81         if (mode == NULL) {
  82                 return 1;
  83         }
  84         info->var.xres = mode->hdisplay;
  85         info->var.right_margin = mode->hsync_start - mode->hdisplay;
  86         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
  87         info->var.left_margin = mode->htotal - mode->hsync_end;
  88         info->var.yres = mode->vdisplay;
  89         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
  90         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
  91         info->var.upper_margin = mode->vtotal - mode->vsync_end;
  92         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
  93         /* avoid overflow */
  94         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
  95
  96         return 0;
  97 }
  98 EXPORT_SYMBOL(radeonfb_resize);
  99
 100 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 101 {
 102         int aligned = width;
 103         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 104         int pitch_mask = 0;
 105
 106         switch (bpp / 8) {
 107         case 1:
 108                 pitch_mask = align_large ? 255 : 127;
 109                 break;
 110         case 2:
 111                 pitch_mask = align_large ? 127 : 31;
 112                 break;
 113         case 3:
 114         case 4:
 115                 pitch_mask = align_large ? 63 : 15;
 116                 break;
 117         }
 118
 119         aligned += pitch_mask;
 120         aligned &= ~pitch_mask;
 121         return aligned;
 122 }
 123
 124 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 125         .gamma_set = radeon_crtc_fb_gamma_set,
 126 };
 127
 128 int radeonfb_create(struct drm_device *dev,
 129                     uint32_t fb_width, uint32_t fb_height,
 130                     uint32_t surface_width, uint32_t surface_height,
 131                     uint32_t surface_depth, uint32_t surface_bpp,
 132                     struct drm_framebuffer **fb_p)
 133 {
 134         struct radeon_device *rdev = dev->dev_private;
 135         struct fb_info *info;
 136         struct radeon_fb_device *rfbdev;
 137         struct drm_framebuffer *fb = NULL;
 138         struct radeon_framebuffer *rfb;
 139         struct drm_mode_fb_cmd mode_cmd;
 140         struct drm_gem_object *gobj = NULL;
 141         struct radeon_object *robj = NULL;
 142         struct device *device = &rdev->pdev->dev;
 143         int size, aligned_size, ret;
 144         u64 fb_gpuaddr;
 145         void *fbptr = NULL;
 146         unsigned long tmp;
 147         bool fb_tiled = false; /* useful for testing */
 148         u32 tiling_flags = 0;
 149
 150         mode_cmd.width = surface_width;
 151         mode_cmd.height = surface_height;
 152         mode_cmd.bpp = surface_bpp;
 153         /* need to align pitch with crtc limits */
 154         mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
 155         mode_cmd.depth = surface_depth;
 156
 157         size = mode_cmd.pitch * mode_cmd.height;
 158         aligned_size = ALIGN(size, PAGE_SIZE);
 159
 160         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 161                         RADEON_GEM_DOMAIN_VRAM,
 162                         false, ttm_bo_type_kernel,
 163                         false, &gobj);
 164         if (ret) {
 165                 printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
 166                        surface_width, surface_height);
 167                 ret = -ENOMEM;
 168                 goto out;
 169         }
 170         robj = gobj->driver_private;
 171
 172         if (fb_tiled)
 173                 tiling_flags = RADEON_TILING_MACRO;
 174
 175 #ifdef __BIG_ENDIAN
 176         switch (mode_cmd.bpp) {
 177         case 32:
 178                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 179                 break;
 180         case 16:
 181                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 182         default:
 183                 break;
 184         }
 185 #endif
 186
 187         if (tiling_flags)
 188                 radeon_object_set_tiling_flags(robj, tiling_flags | RADEON_TILING_SURFACE, mode_cmd.pitch);
 189         mutex_lock(&rdev->ddev->struct_mutex);
 190         fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
 191         if (fb == NULL) {
 192                 DRM_ERROR("failed to allocate fb.\n");
 193                 ret = -ENOMEM;
 194                 goto out_unref;
 195         }
 196         ret = radeon_object_pin(robj, RADEON_GEM_DOMAIN_VRAM, &fb_gpuaddr);
 197         if (ret) {
 198                 printk(KERN_ERR "failed to pin framebuffer\n");
 199                 ret = -ENOMEM;
 200                 goto out_unref;
 201         }
 202
 203         list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
 204
 205         *fb_p = fb;
 206         rfb = to_radeon_framebuffer(fb);
 207         rdev->fbdev_rfb = rfb;
 208         rdev->fbdev_robj = robj;
 209
 210         info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
 211         if (info == NULL) {
 212                 ret = -ENOMEM;
 213                 goto out_unref;
 214         }
 215
 216         rdev->fbdev_info = info;
 217         rfbdev = info->par;
 218         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 219         rfbdev->helper.dev = dev;
 220         ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, 2,
 221                                             RADEONFB_CONN_LIMIT);
 222         if (ret)
 223                 goto out_unref;
 224
 225         if (fb_tiled)
 226                 radeon_object_check_tiling(robj, 0, 0);
 227
 228         ret = radeon_object_kmap(robj, &fbptr);
 229         if (ret) {
 230                 goto out_unref;
 231         }
 232
 233         memset_io(fbptr, 0, aligned_size);
 234
 235         strcpy(info->fix.id, "radeondrmfb");
 236
 237         drm_fb_helper_fill_fix(info, fb->pitch);
 238
 239         info->flags = FBINFO_DEFAULT;
 240         info->fbops = &radeonfb_ops;
 241
 242         tmp = fb_gpuaddr - rdev->mc.vram_location;
 243         info->fix.smem_start = rdev->mc.aper_base + tmp;
 244         info->fix.smem_len = size;
 245         info->screen_base = fbptr;
 246         info->screen_size = size;
 247
 248         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 249
 250         /* setup aperture base/size for vesafb takeover */
 251         info->aperture_base = rdev->ddev->mode_config.fb_base;
 252         info->aperture_size = rdev->mc.real_vram_size;
 253
 254         info->fix.mmio_start = 0;
 255         info->fix.mmio_len = 0;
 256         info->pixmap.size = 64*1024;
 257         info->pixmap.buf_align = 8;
 258         info->pixmap.access_align = 32;
 259         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 260         info->pixmap.scan_align = 1;
 261         if (info->screen_base == NULL) {
 262                 ret = -ENOSPC;
 263                 goto out_unref;
 264         }
 265         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 266         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 267         DRM_INFO("size %lu\n", (unsigned long)size);
 268         DRM_INFO("fb depth is %d\n", fb->depth);
 269         DRM_INFO("   pitch is %d\n", fb->pitch);
 270
 271         fb->fbdev = info;
 272         rfbdev->rfb = rfb;
 273         rfbdev->rdev = rdev;
 274
 275         mutex_unlock(&rdev->ddev->struct_mutex);
 276         return 0;
 277
 278 out_unref:
 279         if (robj) {
 280                 radeon_object_kunmap(robj);
 281         }
 282         if (fb && ret) {
 283                 list_del(&fb->filp_head);
 284                 drm_gem_object_unreference(gobj);
 285                 drm_framebuffer_cleanup(fb);
 286                 kfree(fb);
 287         }
 288         drm_gem_object_unreference(gobj);
 289         mutex_unlock(&rdev->ddev->struct_mutex);
 290 out:
 291         return ret;
 292 }
 293
 294 static char *mode_option;
 295 int radeon_parse_options(char *options)
 296 {
 297         char *this_opt;
 298
 299         if (!options || !*options)
 300                 return 0;
 301
 302         while ((this_opt = strsep(&options, ",")) != NULL) {
 303                 if (!*this_opt)
 304                         continue;
 305                 mode_option = this_opt;
 306         }
 307         return 0;
 308 }
 309
 310 int radeonfb_probe(struct drm_device *dev)
 311 {
 312         return drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
 313 }
 314
 315 int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 316 {
 317         struct fb_info *info;
 318         struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
 319         struct radeon_object *robj;
 320
 321         if (!fb) {
 322                 return -EINVAL;
 323         }
 324         info = fb->fbdev;
 325         if (info) {
 326                 struct radeon_fb_device *rfbdev = info->par;
 327                 robj = rfb->obj->driver_private;
 328                 unregister_framebuffer(info);
 329                 radeon_object_kunmap(robj);
 330                 radeon_object_unpin(robj);
 331                 drm_fb_helper_free(&rfbdev->helper);
 332                 framebuffer_release(info);
 333         }
 334
 335         printk(KERN_INFO "unregistered panic notifier\n");
 336
 337         return 0;
 338 }
 339 EXPORT_SYMBOL(radeonfb_remove);
 340 MODULE_LICENSE("GPL");