drivers/gpu/drm/i915/intel_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 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/errno.h>
  30 #include <linux/string.h>
  31 #include <linux/mm.h>
  32 #include <linux/tty.h>
  33 #include <linux/sysrq.h>
  34 #include <linux/delay.h>
  35 #include <linux/fb.h>
  36 #include <linux/init.h>
  37 #include <linux/vga_switcheroo.h>
  38
  39 #include "drmP.h"
  40 #include "drm.h"
  41 #include "drm_crtc.h"
  42 #include "drm_fb_helper.h"
  43 #include "intel_drv.h"
  44 #include "i915_drm.h"
  45 #include "i915_drv.h"
  46
  47 struct intel_fbdev {
  48         struct drm_fb_helper helper;
  49         struct intel_framebuffer ifb;
  50         struct list_head fbdev_list;
  51         struct drm_display_mode *our_mode;
  52 };
  53
  54 static struct fb_ops intelfb_ops = {
  55         .owner = THIS_MODULE,
  56         .fb_check_var = drm_fb_helper_check_var,
  57         .fb_set_par = drm_fb_helper_set_par,
  58         .fb_fillrect = cfb_fillrect,
  59         .fb_copyarea = cfb_copyarea,
  60         .fb_imageblit = cfb_imageblit,
  61         .fb_pan_display = drm_fb_helper_pan_display,
  62         .fb_blank = drm_fb_helper_blank,
  63         .fb_setcmap = drm_fb_helper_setcmap,
  64 };
  65
  66 static int intelfb_create(struct intel_fbdev *ifbdev,
  67                           struct drm_fb_helper_surface_size *sizes)
  68 {
  69         struct drm_device *dev = ifbdev->helper.dev;
  70         struct fb_info *info;
  71         struct drm_framebuffer *fb;
  72         struct drm_mode_fb_cmd mode_cmd;
  73         struct drm_gem_object *fbo = NULL;
  74         struct drm_i915_gem_object *obj_priv;
  75         struct device *device = &dev->pdev->dev;
  76         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  77
  78         /* we don't do packed 24bpp */
  79         if (sizes->surface_bpp == 24)
  80                 sizes->surface_bpp = 32;
  81
  82         mode_cmd.width = sizes->surface_width;
  83         mode_cmd.height = sizes->surface_height;
  84
  85         mode_cmd.bpp = sizes->surface_bpp;
  86         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  87         mode_cmd.depth = sizes->surface_depth;
  88
  89         size = mode_cmd.pitch * mode_cmd.height;
  90         size = ALIGN(size, PAGE_SIZE);
  91         fbo = i915_gem_alloc_object(dev, size);
  92         if (!fbo) {
  93                 DRM_ERROR("failed to allocate framebuffer\n");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97         obj_priv = to_intel_bo(fbo);
  98
  99         mutex_lock(&dev->struct_mutex);
 100
 101         ret = i915_gem_object_pin(fbo, 64*1024);
 102         if (ret) {
 103                 DRM_ERROR("failed to pin fb: %d\n", ret);
 104                 goto out_unref;
 105         }
 106
 107         /* Flush everything out, we'll be doing GTT only from now on */
 108         i915_gem_object_set_to_gtt_domain(fbo, 1);
 109
 110         info = framebuffer_alloc(0, device);
 111         if (!info) {
 112                 ret = -ENOMEM;
 113                 goto out_unpin;
 114         }
 115
 116         info->par = ifbdev;
 117
 118         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 119
 120         fb = &ifbdev->ifb.base;
 121
 122         ifbdev->helper.fb = fb;
 123         ifbdev->helper.fbdev = info;
 124
 125         strcpy(info->fix.id, "inteldrmfb");
 126
 127         info->flags = FBINFO_DEFAULT;
 128         info->fbops = &intelfb_ops;
 129
 130         /* setup aperture base/size for vesafb takeover */
 131         info->apertures = alloc_apertures(1);
 132         if (!info->apertures) {
 133                 ret = -ENOMEM;
 134                 goto out_unpin;
 135         }
 136         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 137         if (IS_I9XX(dev))
 138                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 2);
 139         else
 140                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 141
 142         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 143         info->fix.smem_len = size;
 144
 145         info->flags = FBINFO_DEFAULT;
 146
 147         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 148                                        size);
 149         if (!info->screen_base) {
 150                 ret = -ENOSPC;
 151                 goto out_unpin;
 152         }
 153
 154         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 155         if (ret) {
 156                 ret = -ENOMEM;
 157                 goto out_unpin;
 158         }
 159         info->screen_size = size;
 160
 161 //      memset(info->screen_base, 0, size);
 162
 163         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 164         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 165
 166         /* FIXME: we really shouldn't expose mmio space at all */
 167         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 168         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 169
 170         info->pixmap.size = 64*1024;
 171         info->pixmap.buf_align = 8;
 172         info->pixmap.access_align = 32;
 173         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 174         info->pixmap.scan_align = 1;
 175
 176         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 177                       fb->width, fb->height,
 178                       obj_priv->gtt_offset, fbo);
 179
 180
 181         mutex_unlock(&dev->struct_mutex);
 182         vga_switcheroo_client_fb_set(dev->pdev, info);
 183         return 0;
 184
 185 out_unpin:
 186         i915_gem_object_unpin(fbo);
 187 out_unref:
 188         drm_gem_object_unreference(fbo);
 189         mutex_unlock(&dev->struct_mutex);
 190 out:
 191         return ret;
 192 }
 193
 194 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 195                                           struct drm_fb_helper_surface_size *sizes)
 196 {
 197         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 198         int new_fb = 0;
 199         int ret;
 200
 201         if (!helper->fb) {
 202                 ret = intelfb_create(ifbdev, sizes);
 203                 if (ret)
 204                         return ret;
 205                 new_fb = 1;
 206         }
 207         return new_fb;
 208 }
 209
 210 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 211         .gamma_set = intel_crtc_fb_gamma_set,
 212         .gamma_get = intel_crtc_fb_gamma_get,
 213         .fb_probe = intel_fb_find_or_create_single,
 214 };
 215
 216 int intel_fbdev_destroy(struct drm_device *dev,
 217                         struct intel_fbdev *ifbdev)
 218 {
 219         struct fb_info *info;
 220         struct intel_framebuffer *ifb = &ifbdev->ifb;
 221
 222         if (ifbdev->helper.fbdev) {
 223                 info = ifbdev->helper.fbdev;
 224                 unregister_framebuffer(info);
 225                 iounmap(info->screen_base);
 226                 if (info->cmap.len)
 227                         fb_dealloc_cmap(&info->cmap);
 228                 framebuffer_release(info);
 229         }
 230
 231         drm_fb_helper_fini(&ifbdev->helper);
 232
 233         drm_framebuffer_cleanup(&ifb->base);
 234         if (ifb->obj)
 235                 drm_gem_object_unreference_unlocked(ifb->obj);
 236
 237         return 0;
 238 }
 239
 240 int intel_fbdev_init(struct drm_device *dev)
 241 {
 242         struct intel_fbdev *ifbdev;
 243         drm_i915_private_t *dev_priv = dev->dev_private;
 244
 245         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 246         if (!ifbdev)
 247                 return -ENOMEM;
 248
 249         dev_priv->fbdev = ifbdev;
 250         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 251
 252         drm_fb_helper_init(dev, &ifbdev->helper, 2,
 253                            INTELFB_CONN_LIMIT);
 254
 255         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 256         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 257         return 0;
 258 }
 259
 260 void intel_fbdev_fini(struct drm_device *dev)
 261 {
 262         drm_i915_private_t *dev_priv = dev->dev_private;
 263         if (!dev_priv->fbdev)
 264                 return;
 265
 266         intel_fbdev_destroy(dev, dev_priv->fbdev);
 267         kfree(dev_priv->fbdev);
 268         dev_priv->fbdev = NULL;
 269 }
 270 MODULE_LICENSE("GPL and additional rights");
 271
 272 void intel_fb_output_poll_changed(struct drm_device *dev)
 273 {
 274         drm_i915_private_t *dev_priv = dev->dev_private;
 275         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 276 }