SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/slab.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38 #include <linux/vga_switcheroo.h>
  39
  40 #include "drmP.h"
  41 #include "drm.h"
  42 #include "drm_crtc.h"
  43 #include "drm_fb_helper.h"
  44 #include "intel_drv.h"
  45 #include "i915_drm.h"
  46 #include "i915_drv.h"
  47
  48 struct intel_fbdev {
  49         struct drm_fb_helper helper;
  50         struct intel_framebuffer ifb;
  51         struct list_head fbdev_list;
  52         struct drm_display_mode *our_mode;
  53 };
  54
  55 static struct fb_ops intelfb_ops = {
  56         .owner = THIS_MODULE,
  57         .fb_check_var = drm_fb_helper_check_var,
  58         .fb_set_par = drm_fb_helper_set_par,
  59         .fb_fillrect = cfb_fillrect,
  60         .fb_copyarea = cfb_copyarea,
  61         .fb_imageblit = cfb_imageblit,
  62         .fb_pan_display = drm_fb_helper_pan_display,
  63         .fb_blank = drm_fb_helper_blank,
  64         .fb_setcmap = drm_fb_helper_setcmap,
  65 };
  66
  67 static int intelfb_create(struct intel_fbdev *ifbdev,
  68                           struct drm_fb_helper_surface_size *sizes)
  69 {
  70         struct drm_device *dev = ifbdev->helper.dev;
  71         struct fb_info *info;
  72         struct drm_framebuffer *fb;
  73         struct drm_mode_fb_cmd mode_cmd;
  74         struct drm_gem_object *fbo = NULL;
  75         struct drm_i915_gem_object *obj_priv;
  76         struct device *device = &dev->pdev->dev;
  77         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  78
  79         /* we don't do packed 24bpp */
  80         if (sizes->surface_bpp == 24)
  81                 sizes->surface_bpp = 32;
  82
  83         mode_cmd.width = sizes->surface_width;
  84         mode_cmd.height = sizes->surface_height;
  85
  86         mode_cmd.bpp = sizes->surface_bpp;
  87         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  88         mode_cmd.depth = sizes->surface_depth;
  89
  90         size = mode_cmd.pitch * mode_cmd.height;
  91         size = ALIGN(size, PAGE_SIZE);
  92         fbo = drm_gem_object_alloc(dev, size);
  93         if (!fbo) {
  94                 DRM_ERROR("failed to allocate framebuffer\n");
  95                 ret = -ENOMEM;
  96                 goto out;
  97         }
  98         obj_priv = fbo->driver_private;
  99
 100         mutex_lock(&dev->struct_mutex);
 101
 102         ret = i915_gem_object_pin(fbo, 64*1024);
 103         if (ret) {
 104                 DRM_ERROR("failed to pin fb: %d\n", ret);
 105                 goto out_unref;
 106         }
 107
 108         /* Flush everything out, we'll be doing GTT only from now on */
 109         i915_gem_object_set_to_gtt_domain(fbo, 1);
 110
 111         info = framebuffer_alloc(0, device);
 112         if (!info) {
 113                 ret = -ENOMEM;
 114                 goto out_unpin;
 115         }
 116
 117         info->par = ifbdev;
 118
 119         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 120
 121         fb = &ifbdev->ifb.base;
 122
 123         ifbdev->helper.fb = fb;
 124         ifbdev->helper.fbdev = info;
 125
 126         strcpy(info->fix.id, "inteldrmfb");
 127
 128         info->flags = FBINFO_DEFAULT;
 129         info->fbops = &intelfb_ops;
 130
 131         /* setup aperture base/size for vesafb takeover */
 132         info->aperture_base = dev->mode_config.fb_base;
 133         if (IS_I9XX(dev))
 134                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 135         else
 136                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 137
 138         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 139         info->fix.smem_len = size;
 140
 141         info->flags = FBINFO_DEFAULT;
 142
 143         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 144                                        size);
 145         if (!info->screen_base) {
 146                 ret = -ENOSPC;
 147                 goto out_unpin;
 148         }
 149
 150         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 151         if (ret) {
 152                 ret = -ENOMEM;
 153                 goto out_unpin;
 154         }
 155         info->screen_size = size;
 156
 157 //      memset(info->screen_base, 0, size);
 158
 159         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 160         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 161
 162         /* FIXME: we really shouldn't expose mmio space at all */
 163         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 164         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 165
 166         info->pixmap.size = 64*1024;
 167         info->pixmap.buf_align = 8;
 168         info->pixmap.access_align = 32;
 169         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 170         info->pixmap.scan_align = 1;
 171
 172         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 173                       fb->width, fb->height,
 174                       obj_priv->gtt_offset, fbo);
 175
 176
 177         mutex_unlock(&dev->struct_mutex);
 178         vga_switcheroo_client_fb_set(dev->pdev, info);
 179         return 0;
 180
 181 out_unpin:
 182         i915_gem_object_unpin(fbo);
 183 out_unref:
 184         drm_gem_object_unreference(fbo);
 185         mutex_unlock(&dev->struct_mutex);
 186 out:
 187         return ret;
 188 }
 189
 190 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 191                                           struct drm_fb_helper_surface_size *sizes)
 192 {
 193         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 194         int new_fb = 0;
 195         int ret;
 196
 197         if (!helper->fb) {
 198                 ret = intelfb_create(ifbdev, sizes);
 199                 if (ret)
 200                         return ret;
 201                 new_fb = 1;
 202         }
 203         return new_fb;
 204 }
 205
 206 void intelfb_hotplug(struct drm_device *dev, bool polled)
 207 {
 208         drm_i915_private_t *dev_priv = dev->dev_private;
 209         drm_helper_fb_hpd_irq_event(&dev_priv->fbdev->helper);
 210 }
 211
 212 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 213         .gamma_set = intel_crtc_fb_gamma_set,
 214         .gamma_get = intel_crtc_fb_gamma_get,
 215         .fb_probe = intel_fb_find_or_create_single,
 216 };
 217
 218 int intel_fbdev_destroy(struct drm_device *dev,
 219                         struct intel_fbdev *ifbdev)
 220 {
 221         struct fb_info *info;
 222         struct intel_framebuffer *ifb = &ifbdev->ifb;
 223
 224         if (ifbdev->helper.fbdev) {
 225                 info = ifbdev->helper.fbdev;
 226                 unregister_framebuffer(info);
 227                 iounmap(info->screen_base);
 228                 if (info->cmap.len)
 229                         fb_dealloc_cmap(&info->cmap);
 230                 framebuffer_release(info);
 231         }
 232
 233         drm_fb_helper_fini(&ifbdev->helper);
 234
 235         drm_framebuffer_cleanup(&ifb->base);
 236         if (ifb->obj)
 237                 drm_gem_object_unreference_unlocked(ifb->obj);
 238
 239         return 0;
 240 }
 241
 242 int intel_fbdev_init(struct drm_device *dev)
 243 {
 244         struct intel_fbdev *ifbdev;
 245         drm_i915_private_t *dev_priv = dev->dev_private;
 246
 247         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 248         if (!ifbdev)
 249                 return -ENOMEM;
 250
 251         dev_priv->fbdev = ifbdev;
 252         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 253
 254         drm_fb_helper_init(dev, &ifbdev->helper, 2,
 255                            INTELFB_CONN_LIMIT, false);
 256
 257         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 258         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 259         return 0;
 260 }
 261
 262 void intel_fbdev_fini(struct drm_device *dev)
 263 {
 264         drm_i915_private_t *dev_priv = dev->dev_private;
 265         if (!dev_priv->fbdev)
 266                 return;
 267
 268         intel_fbdev_destroy(dev, dev_priv->fbdev);
 269         kfree(dev_priv->fbdev);
 270         dev_priv->fbdev = NULL;
 271 }
 272 MODULE_LICENSE("GPL and additional rights");