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         ret = i915_gem_object_set_to_gtt_domain(fbo, 1);
 109         if (ret) {
 110                 DRM_ERROR("failed to bind fb: %d.\n", ret);
 111                 goto out_unpin;
 112         }
 113
 114         info = framebuffer_alloc(0, device);
 115         if (!info) {
 116                 ret = -ENOMEM;
 117                 goto out_unpin;
 118         }
 119
 120         info->par = ifbdev;
 121
 122         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 123
 124         fb = &ifbdev->ifb.base;
 125
 126         ifbdev->helper.fb = fb;
 127         ifbdev->helper.fbdev = info;
 128
 129         strcpy(info->fix.id, "inteldrmfb");
 130
 131         info->flags = FBINFO_DEFAULT;
 132         info->fbops = &intelfb_ops;
 133
 134         /* setup aperture base/size for vesafb takeover */
 135         info->apertures = alloc_apertures(1);
 136         if (!info->apertures) {
 137                 ret = -ENOMEM;
 138                 goto out_unpin;
 139         }
 140         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 141         if (IS_I9XX(dev))
 142                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 2);
 143         else
 144                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 145
 146         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 147         info->fix.smem_len = size;
 148
 149         info->flags = FBINFO_DEFAULT;
 150
 151         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 152                                        size);
 153         if (!info->screen_base) {
 154                 ret = -ENOSPC;
 155                 goto out_unpin;
 156         }
 157
 158         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 159         if (ret) {
 160                 ret = -ENOMEM;
 161                 goto out_unpin;
 162         }
 163         info->screen_size = size;
 164
 165 //      memset(info->screen_base, 0, size);
 166
 167         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 168         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 169
 170         /* FIXME: we really shouldn't expose mmio space at all */
 171         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 172         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 173
 174         info->pixmap.size = 64*1024;
 175         info->pixmap.buf_align = 8;
 176         info->pixmap.access_align = 32;
 177         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 178         info->pixmap.scan_align = 1;
 179
 180         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 181                       fb->width, fb->height,
 182                       obj_priv->gtt_offset, fbo);
 183
 184
 185         mutex_unlock(&dev->struct_mutex);
 186         vga_switcheroo_client_fb_set(dev->pdev, info);
 187         return 0;
 188
 189 out_unpin:
 190         i915_gem_object_unpin(fbo);
 191 out_unref:
 192         drm_gem_object_unreference(fbo);
 193         mutex_unlock(&dev->struct_mutex);
 194 out:
 195         return ret;
 196 }
 197
 198 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 199                                           struct drm_fb_helper_surface_size *sizes)
 200 {
 201         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 202         int new_fb = 0;
 203         int ret;
 204
 205         if (!helper->fb) {
 206                 ret = intelfb_create(ifbdev, sizes);
 207                 if (ret)
 208                         return ret;
 209                 new_fb = 1;
 210         }
 211         return new_fb;
 212 }
 213
 214 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 215         .gamma_set = intel_crtc_fb_gamma_set,
 216         .gamma_get = intel_crtc_fb_gamma_get,
 217         .fb_probe = intel_fb_find_or_create_single,
 218 };
 219
 220 int intel_fbdev_destroy(struct drm_device *dev,
 221                         struct intel_fbdev *ifbdev)
 222 {
 223         struct fb_info *info;
 224         struct intel_framebuffer *ifb = &ifbdev->ifb;
 225
 226         if (ifbdev->helper.fbdev) {
 227                 info = ifbdev->helper.fbdev;
 228                 unregister_framebuffer(info);
 229                 iounmap(info->screen_base);
 230                 if (info->cmap.len)
 231                         fb_dealloc_cmap(&info->cmap);
 232                 framebuffer_release(info);
 233         }
 234
 235         drm_fb_helper_fini(&ifbdev->helper);
 236
 237         drm_framebuffer_cleanup(&ifb->base);
 238         if (ifb->obj)
 239                 drm_gem_object_unreference_unlocked(ifb->obj);
 240
 241         return 0;
 242 }
 243
 244 int intel_fbdev_init(struct drm_device *dev)
 245 {
 246         struct intel_fbdev *ifbdev;
 247         drm_i915_private_t *dev_priv = dev->dev_private;
 248
 249         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 250         if (!ifbdev)
 251                 return -ENOMEM;
 252
 253         dev_priv->fbdev = ifbdev;
 254         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 255
 256         drm_fb_helper_init(dev, &ifbdev->helper, 2,
 257                            INTELFB_CONN_LIMIT);
 258
 259         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 260         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 261         return 0;
 262 }
 263
 264 void intel_fbdev_fini(struct drm_device *dev)
 265 {
 266         drm_i915_private_t *dev_priv = dev->dev_private;
 267         if (!dev_priv->fbdev)
 268                 return;
 269
 270         intel_fbdev_destroy(dev, dev_priv->fbdev);
 271         kfree(dev_priv->fbdev);
 272         dev_priv->fbdev = NULL;
 273 }
 274 MODULE_LICENSE("GPL and additional rights");
 275
 276 void intel_fb_output_poll_changed(struct drm_device *dev)
 277 {
 278         drm_i915_private_t *dev_priv = dev->dev_private;
 279         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 280 }