drm/i915: fix deadlock in fb teardown
[linux-3.10.git] / 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 = intel_pin_and_fence_fb_obj(dev, fbo);
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(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         int ret;
249
250         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
251         if (!ifbdev)
252                 return -ENOMEM;
253
254         dev_priv->fbdev = ifbdev;
255         ifbdev->helper.funcs = &intel_fb_helper_funcs;
256
257         ret = drm_fb_helper_init(dev, &ifbdev->helper,
258                                  dev_priv->num_pipe,
259                                  INTELFB_CONN_LIMIT);
260         if (ret) {
261                 kfree(ifbdev);
262                 return ret;
263         }
264
265         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
266         drm_fb_helper_initial_config(&ifbdev->helper, 32);
267         return 0;
268 }
269
270 void intel_fbdev_fini(struct drm_device *dev)
271 {
272         drm_i915_private_t *dev_priv = dev->dev_private;
273         if (!dev_priv->fbdev)
274                 return;
275
276         intel_fbdev_destroy(dev, dev_priv->fbdev);
277         kfree(dev_priv->fbdev);
278         dev_priv->fbdev = NULL;
279 }
280 MODULE_LICENSE("GPL and additional rights");
281
282 void intel_fb_output_poll_changed(struct drm_device *dev)
283 {
284         drm_i915_private_t *dev_priv = dev->dev_private;
285         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
286 }