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 intelfb_par {
  49         struct drm_fb_helper helper;
  50         struct intel_framebuffer *intel_fb;
  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_setcolreg = drm_fb_helper_setcolreg,
  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 struct drm_fb_helper_funcs intel_fb_helper_funcs = {
  68         .gamma_set = intel_crtc_fb_gamma_set,
  69         .gamma_get = intel_crtc_fb_gamma_get,
  70 };
  71
  72
  73 /**
  74  * Currently it is assumed that the old framebuffer is reused.
  75  *
  76  * LOCKING
  77  * caller should hold the mode config lock.
  78  *
  79  */
  80 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
  81 {
  82         struct fb_info *info;
  83         struct drm_framebuffer *fb;
  84         struct drm_display_mode *mode = crtc->desired_mode;
  85
  86         fb = crtc->fb;
  87         if (!fb)
  88                 return 1;
  89
  90         info = fb->fbdev;
  91         if (!info)
  92                 return 1;
  93
  94         if (!mode)
  95                 return 1;
  96
  97         info->var.xres = mode->hdisplay;
  98         info->var.right_margin = mode->hsync_start - mode->hdisplay;
  99         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
 100         info->var.left_margin = mode->htotal - mode->hsync_end;
 101         info->var.yres = mode->vdisplay;
 102         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
 103         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
 104         info->var.upper_margin = mode->vtotal - mode->vsync_end;
 105         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
 106         /* avoid overflow */
 107         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
 108
 109         return 0;
 110 }
 111 EXPORT_SYMBOL(intelfb_resize);
 112
 113 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
 114                           uint32_t fb_height, uint32_t surface_width,
 115                           uint32_t surface_height,
 116                           uint32_t surface_depth, uint32_t surface_bpp,
 117                           struct drm_framebuffer **fb_p)
 118 {
 119         struct fb_info *info;
 120         struct intelfb_par *par;
 121         struct drm_framebuffer *fb;
 122         struct intel_framebuffer *intel_fb;
 123         struct drm_mode_fb_cmd mode_cmd;
 124         struct drm_gem_object *fbo = NULL;
 125         struct drm_i915_gem_object *obj_priv;
 126         struct device *device = &dev->pdev->dev;
 127         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 128
 129         /* we don't do packed 24bpp */
 130         if (surface_bpp == 24)
 131                 surface_bpp = 32;
 132
 133         mode_cmd.width = surface_width;
 134         mode_cmd.height = surface_height;
 135
 136         mode_cmd.bpp = surface_bpp;
 137         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
 138         mode_cmd.depth = surface_depth;
 139
 140         size = mode_cmd.pitch * mode_cmd.height;
 141         size = ALIGN(size, PAGE_SIZE);
 142         fbo = drm_gem_object_alloc(dev, size);
 143         if (!fbo) {
 144                 DRM_ERROR("failed to allocate framebuffer\n");
 145                 ret = -ENOMEM;
 146                 goto out;
 147         }
 148         obj_priv = fbo->driver_private;
 149
 150         mutex_lock(&dev->struct_mutex);
 151
 152         ret = i915_gem_object_pin(fbo, 64*1024);
 153         if (ret) {
 154                 DRM_ERROR("failed to pin fb: %d\n", ret);
 155                 goto out_unref;
 156         }
 157
 158         /* Flush everything out, we'll be doing GTT only from now on */
 159         i915_gem_object_set_to_gtt_domain(fbo, 1);
 160
 161         ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
 162         if (ret) {
 163                 DRM_ERROR("failed to allocate fb.\n");
 164                 goto out_unpin;
 165         }
 166
 167         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
 168
 169         intel_fb = to_intel_framebuffer(fb);
 170         *fb_p = fb;
 171
 172         info = framebuffer_alloc(sizeof(struct intelfb_par), device);
 173         if (!info) {
 174                 ret = -ENOMEM;
 175                 goto out_unpin;
 176         }
 177
 178         par = info->par;
 179
 180         par->helper.funcs = &intel_fb_helper_funcs;
 181         par->helper.dev = dev;
 182         ret = drm_fb_helper_init_crtc_count(&par->helper, 2,
 183                                             INTELFB_CONN_LIMIT);
 184         if (ret)
 185                 goto out_unref;
 186
 187         strcpy(info->fix.id, "inteldrmfb");
 188
 189         info->flags = FBINFO_DEFAULT;
 190
 191         info->fbops = &intelfb_ops;
 192
 193
 194         /* setup aperture base/size for vesafb takeover */
 195         info->aperture_base = dev->mode_config.fb_base;
 196         if (IS_I9XX(dev))
 197                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 198         else
 199                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 200
 201         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 202         info->fix.smem_len = size;
 203
 204         info->flags = FBINFO_DEFAULT;
 205
 206         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 207                                        size);
 208         if (!info->screen_base) {
 209                 ret = -ENOSPC;
 210                 goto out_unpin;
 211         }
 212         info->screen_size = size;
 213
 214 //      memset(info->screen_base, 0, size);
 215
 216         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 217         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 218
 219         /* FIXME: we really shouldn't expose mmio space at all */
 220         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 221         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 222
 223         info->pixmap.size = 64*1024;
 224         info->pixmap.buf_align = 8;
 225         info->pixmap.access_align = 32;
 226         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 227         info->pixmap.scan_align = 1;
 228
 229         fb->fbdev = info;
 230
 231         par->intel_fb = intel_fb;
 232
 233         /* To allow resizeing without swapping buffers */
 234         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 235                         intel_fb->base.width, intel_fb->base.height,
 236                         obj_priv->gtt_offset, fbo);
 237
 238         mutex_unlock(&dev->struct_mutex);
 239         vga_switcheroo_client_fb_set(dev->pdev, info);
 240         return 0;
 241
 242 out_unpin:
 243         i915_gem_object_unpin(fbo);
 244 out_unref:
 245         drm_gem_object_unreference(fbo);
 246         mutex_unlock(&dev->struct_mutex);
 247 out:
 248         return ret;
 249 }
 250
 251 int intelfb_probe(struct drm_device *dev)
 252 {
 253         int ret;
 254
 255         DRM_DEBUG_KMS("\n");
 256         ret = drm_fb_helper_single_fb_probe(dev, 32, intelfb_create);
 257         return ret;
 258 }
 259 EXPORT_SYMBOL(intelfb_probe);
 260
 261 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 262 {
 263         struct fb_info *info;
 264
 265         if (!fb)
 266                 return -EINVAL;
 267
 268         info = fb->fbdev;
 269
 270         if (info) {
 271                 struct intelfb_par *par = info->par;
 272                 unregister_framebuffer(info);
 273                 iounmap(info->screen_base);
 274                 if (info->par)
 275                         drm_fb_helper_free(&par->helper);
 276                 framebuffer_release(info);
 277         }
 278
 279         return 0;
 280 }
 281 EXPORT_SYMBOL(intelfb_remove);
 282 MODULE_LICENSE("GPL and additional rights");