intel_fb.c revision 386516744ba45d50f42c6999151cc210cb4f96e4 
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
48struct intel_kernel_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
55static 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_setcolreg = drm_fb_helper_setcolreg,
60	.fb_fillrect = cfb_fillrect,
61	.fb_copyarea = cfb_copyarea,
62	.fb_imageblit = cfb_imageblit,
63	.fb_pan_display = drm_fb_helper_pan_display,
64	.fb_blank = drm_fb_helper_blank,
65	.fb_setcmap = drm_fb_helper_setcmap,
66};
67
68static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
69	.gamma_set = intel_crtc_fb_gamma_set,
70	.gamma_get = intel_crtc_fb_gamma_get,
71};
72
73
74static int intelfb_create(struct drm_device *dev,
75			  struct drm_fb_helper_surface_size *sizes,
76			  struct intel_kernel_fbdev **ifbdev_p)
77{
78	struct fb_info *info;
79	struct intel_kernel_fbdev *ifbdev;
80	struct drm_framebuffer *fb;
81	struct intel_framebuffer *intel_fb;
82	struct drm_mode_fb_cmd mode_cmd;
83	struct drm_gem_object *fbo = NULL;
84	struct drm_i915_gem_object *obj_priv;
85	struct device *device = &dev->pdev->dev;
86	int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
87
88	/* we don't do packed 24bpp */
89	if (sizes->surface_bpp == 24)
90		sizes->surface_bpp = 32;
91
92	mode_cmd.width = sizes->surface_width;
93	mode_cmd.height = sizes->surface_height;
94
95	mode_cmd.bpp = sizes->surface_bpp;
96	mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
97	mode_cmd.depth = sizes->surface_depth;
98
99	size = mode_cmd.pitch * mode_cmd.height;
100	size = ALIGN(size, PAGE_SIZE);
101	fbo = drm_gem_object_alloc(dev, size);
102	if (!fbo) {
103		DRM_ERROR("failed to allocate framebuffer\n");
104		ret = -ENOMEM;
105		goto out;
106	}
107	obj_priv = fbo->driver_private;
108
109	mutex_lock(&dev->struct_mutex);
110
111	ret = i915_gem_object_pin(fbo, 64*1024);
112	if (ret) {
113		DRM_ERROR("failed to pin fb: %d\n", ret);
114		goto out_unref;
115	}
116
117	/* Flush everything out, we'll be doing GTT only from now on */
118	i915_gem_object_set_to_gtt_domain(fbo, 1);
119
120	info = framebuffer_alloc(sizeof(struct intel_kernel_fbdev), device);
121	if (!info) {
122		ret = -ENOMEM;
123		goto out_unpin;
124	}
125
126	ifbdev = info->par;
127	intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
128
129	fb = &ifbdev->ifb.base;
130
131	ifbdev->helper.fb = fb;
132	ifbdev->helper.fbdev = info;
133	ifbdev->helper.funcs = &intel_fb_helper_funcs;
134	ifbdev->helper.dev = dev;
135
136	*ifbdev_p = ifbdev;
137
138	ret = drm_fb_helper_init_crtc_count(&ifbdev->helper, 2,
139					    INTELFB_CONN_LIMIT);
140	if (ret)
141		goto out_unref;
142
143	strcpy(info->fix.id, "inteldrmfb");
144
145	info->flags = FBINFO_DEFAULT;
146
147	info->fbops = &intelfb_ops;
148
149
150	/* setup aperture base/size for vesafb takeover */
151	info->aperture_base = dev->mode_config.fb_base;
152	if (IS_I9XX(dev))
153		info->aperture_size = pci_resource_len(dev->pdev, 2);
154	else
155		info->aperture_size = pci_resource_len(dev->pdev, 0);
156
157	info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
158	info->fix.smem_len = size;
159
160	info->flags = FBINFO_DEFAULT;
161
162	info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
163				       size);
164	if (!info->screen_base) {
165		ret = -ENOSPC;
166		goto out_unpin;
167	}
168	info->screen_size = size;
169
170//	memset(info->screen_base, 0, size);
171
172	drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
173	drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
174
175	/* FIXME: we really shouldn't expose mmio space at all */
176	info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
177	info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
178
179	info->pixmap.size = 64*1024;
180	info->pixmap.buf_align = 8;
181	info->pixmap.access_align = 32;
182	info->pixmap.flags = FB_PIXMAP_SYSTEM;
183	info->pixmap.scan_align = 1;
184
185	DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
186			intel_fb->base.width, intel_fb->base.height,
187			obj_priv->gtt_offset, fbo);
188
189
190	mutex_unlock(&dev->struct_mutex);
191	vga_switcheroo_client_fb_set(dev->pdev, info);
192	return 0;
193
194out_unpin:
195	i915_gem_object_unpin(fbo);
196out_unref:
197	drm_gem_object_unreference(fbo);
198	mutex_unlock(&dev->struct_mutex);
199out:
200	return ret;
201}
202
203static int intel_fb_find_or_create_single(struct drm_device *dev,
204					  struct drm_fb_helper_surface_size *sizes,
205					  struct drm_fb_helper **fb_ptr)
206{
207	drm_i915_private_t *dev_priv = dev->dev_private;
208	struct intel_kernel_fbdev *ifbdev = NULL;
209	int new_fb = 0;
210	int ret;
211
212	if (!dev_priv->fbdev) {
213		ret = intelfb_create(dev, sizes,
214				     &ifbdev);
215		if (ret)
216			return ret;
217
218		dev_priv->fbdev = ifbdev;
219		new_fb = 1;
220	} else {
221		ifbdev = dev_priv->fbdev;
222		if (ifbdev->ifb.base.width < sizes->surface_width ||
223		    ifbdev->ifb.base.height < sizes->surface_height) {
224			DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
225			return -EINVAL;
226		}
227	}
228
229	*fb_ptr = &ifbdev->helper;
230	return new_fb;
231}
232
233static int intelfb_probe(struct drm_device *dev)
234{
235	int ret;
236
237	DRM_DEBUG_KMS("\n");
238	ret = drm_fb_helper_single_fb_probe(dev, 32, intel_fb_find_or_create_single);
239	return ret;
240}
241
242int intel_fbdev_destroy(struct drm_device *dev,
243			struct intel_kernel_fbdev *ifbdev)
244{
245	struct fb_info *info;
246	struct intel_framebuffer *ifb = &ifbdev->ifb;
247
248	info = ifbdev->helper.fbdev;
249
250	unregister_framebuffer(info);
251	iounmap(info->screen_base);
252	drm_fb_helper_free(&ifbdev->helper);
253
254	drm_framebuffer_cleanup(&ifb->base);
255	drm_gem_object_unreference_unlocked(ifb->obj);
256
257	framebuffer_release(info);
258
259	return 0;
260}
261
262int intel_fbdev_init(struct drm_device *dev)
263{
264	drm_helper_initial_config(dev);
265	intelfb_probe(dev);
266	return 0;
267}
268
269void intel_fbdev_fini(struct drm_device *dev)
270{
271	drm_i915_private_t *dev_priv = dev->dev_private;
272	intel_fbdev_destroy(dev, dev_priv->fbdev);
273	dev_priv->fbdev = NULL;
274}
275MODULE_LICENSE("GPL and additional rights");
276