b38c4c8e2c611f9d8f6d9276bc69d8f199e056c0
[linux-2.6.git] / drivers / gpu / drm / radeon / radeon_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      *  Modularization
28      */
29
30 #include <linux/module.h>
31 #include <linux/fb.h>
32
33 #include "drmP.h"
34 #include "drm.h"
35 #include "drm_crtc.h"
36 #include "drm_crtc_helper.h"
37 #include "radeon_drm.h"
38 #include "radeon.h"
39
40 #include "drm_fb_helper.h"
41
42 struct radeon_fb_device {
43         struct drm_fb_helper helper;
44         struct radeon_framebuffer       *rfb;
45         struct radeon_device            *rdev;
46 };
47
48 static struct fb_ops radeonfb_ops = {
49         .owner = THIS_MODULE,
50         .fb_check_var = drm_fb_helper_check_var,
51         .fb_set_par = drm_fb_helper_set_par,
52         .fb_setcolreg = drm_fb_helper_setcolreg,
53         .fb_fillrect = cfb_fillrect,
54         .fb_copyarea = cfb_copyarea,
55         .fb_imageblit = cfb_imageblit,
56         .fb_pan_display = drm_fb_helper_pan_display,
57         .fb_blank = drm_fb_helper_blank,
58         .fb_setcmap = drm_fb_helper_setcmap,
59 };
60
61 /**
62  * Curretly it is assumed that the old framebuffer is reused.
63  *
64  * LOCKING
65  * caller should hold the mode config lock.
66  *
67  */
68 int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
69 {
70         struct fb_info *info;
71         struct drm_framebuffer *fb;
72         struct drm_display_mode *mode = crtc->desired_mode;
73
74         fb = crtc->fb;
75         if (fb == NULL) {
76                 return 1;
77         }
78         info = fb->fbdev;
79         if (info == NULL) {
80                 return 1;
81         }
82         if (mode == NULL) {
83                 return 1;
84         }
85         info->var.xres = mode->hdisplay;
86         info->var.right_margin = mode->hsync_start - mode->hdisplay;
87         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
88         info->var.left_margin = mode->htotal - mode->hsync_end;
89         info->var.yres = mode->vdisplay;
90         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
91         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
92         info->var.upper_margin = mode->vtotal - mode->vsync_end;
93         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
94         /* avoid overflow */
95         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
96
97         return 0;
98 }
99 EXPORT_SYMBOL(radeonfb_resize);
100
101 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
102 {
103         int aligned = width;
104         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
105         int pitch_mask = 0;
106
107         switch (bpp / 8) {
108         case 1:
109                 pitch_mask = align_large ? 255 : 127;
110                 break;
111         case 2:
112                 pitch_mask = align_large ? 127 : 31;
113                 break;
114         case 3:
115         case 4:
116                 pitch_mask = align_large ? 63 : 15;
117                 break;
118         }
119
120         aligned += pitch_mask;
121         aligned &= ~pitch_mask;
122         return aligned;
123 }
124
125 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
126         .gamma_set = radeon_crtc_fb_gamma_set,
127         .gamma_get = radeon_crtc_fb_gamma_get,
128 };
129
130 int radeonfb_create(struct drm_device *dev,
131                     uint32_t fb_width, uint32_t fb_height,
132                     uint32_t surface_width, uint32_t surface_height,
133                     uint32_t surface_depth, uint32_t surface_bpp,
134                     struct drm_framebuffer **fb_p)
135 {
136         struct radeon_device *rdev = dev->dev_private;
137         struct fb_info *info;
138         struct radeon_fb_device *rfbdev;
139         struct drm_framebuffer *fb = NULL;
140         struct radeon_framebuffer *rfb;
141         struct drm_mode_fb_cmd mode_cmd;
142         struct drm_gem_object *gobj = NULL;
143         struct radeon_object *robj = NULL;
144         struct device *device = &rdev->pdev->dev;
145         int size, aligned_size, ret;
146         u64 fb_gpuaddr;
147         void *fbptr = NULL;
148         unsigned long tmp;
149         bool fb_tiled = false; /* useful for testing */
150         u32 tiling_flags = 0;
151         int crtc_count;
152
153         mode_cmd.width = surface_width;
154         mode_cmd.height = surface_height;
155
156         /* avivo can't scanout real 24bpp */
157         if ((surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
158                 surface_bpp = 32;
159
160         mode_cmd.bpp = surface_bpp;
161         /* need to align pitch with crtc limits */
162         mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
163         mode_cmd.depth = surface_depth;
164
165         size = mode_cmd.pitch * mode_cmd.height;
166         aligned_size = ALIGN(size, PAGE_SIZE);
167
168         ret = radeon_gem_object_create(rdev, aligned_size, 0,
169                         RADEON_GEM_DOMAIN_VRAM,
170                         false, ttm_bo_type_kernel,
171                         false, &gobj);
172         if (ret) {
173                 printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
174                        surface_width, surface_height);
175                 ret = -ENOMEM;
176                 goto out;
177         }
178         robj = gobj->driver_private;
179
180         if (fb_tiled)
181                 tiling_flags = RADEON_TILING_MACRO;
182
183 #ifdef __BIG_ENDIAN
184         switch (mode_cmd.bpp) {
185         case 32:
186                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
187                 break;
188         case 16:
189                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
190         default:
191                 break;
192         }
193 #endif
194
195         if (tiling_flags)
196                 radeon_object_set_tiling_flags(robj, tiling_flags | RADEON_TILING_SURFACE, mode_cmd.pitch);
197         mutex_lock(&rdev->ddev->struct_mutex);
198         fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
199         if (fb == NULL) {
200                 DRM_ERROR("failed to allocate fb.\n");
201                 ret = -ENOMEM;
202                 goto out_unref;
203         }
204         ret = radeon_object_pin(robj, RADEON_GEM_DOMAIN_VRAM, &fb_gpuaddr);
205         if (ret) {
206                 printk(KERN_ERR "failed to pin framebuffer\n");
207                 ret = -ENOMEM;
208                 goto out_unref;
209         }
210
211         list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
212
213         *fb_p = fb;
214         rfb = to_radeon_framebuffer(fb);
215         rdev->fbdev_rfb = rfb;
216         rdev->fbdev_robj = robj;
217
218         info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
219         if (info == NULL) {
220                 ret = -ENOMEM;
221                 goto out_unref;
222         }
223
224         rdev->fbdev_info = info;
225         rfbdev = info->par;
226         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
227         rfbdev->helper.dev = dev;
228         if (rdev->flags & RADEON_SINGLE_CRTC)
229                 crtc_count = 1;
230         else
231                 crtc_count = 2;
232         ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, crtc_count,
233                                             RADEONFB_CONN_LIMIT);
234         if (ret)
235                 goto out_unref;
236
237         if (fb_tiled)
238                 radeon_object_check_tiling(robj, 0, 0);
239
240         ret = radeon_object_kmap(robj, &fbptr);
241         if (ret) {
242                 goto out_unref;
243         }
244
245         memset_io(fbptr, 0, aligned_size);
246
247         strcpy(info->fix.id, "radeondrmfb");
248
249         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
250
251         info->flags = FBINFO_DEFAULT;
252         info->fbops = &radeonfb_ops;
253
254         tmp = fb_gpuaddr - rdev->mc.vram_location;
255         info->fix.smem_start = rdev->mc.aper_base + tmp;
256         info->fix.smem_len = size;
257         info->screen_base = fbptr;
258         info->screen_size = size;
259
260         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
261
262         /* setup aperture base/size for vesafb takeover */
263         info->aperture_base = rdev->ddev->mode_config.fb_base;
264         info->aperture_size = rdev->mc.real_vram_size;
265
266         info->fix.mmio_start = 0;
267         info->fix.mmio_len = 0;
268         info->pixmap.size = 64*1024;
269         info->pixmap.buf_align = 8;
270         info->pixmap.access_align = 32;
271         info->pixmap.flags = FB_PIXMAP_SYSTEM;
272         info->pixmap.scan_align = 1;
273         if (info->screen_base == NULL) {
274                 ret = -ENOSPC;
275                 goto out_unref;
276         }
277         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
278         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
279         DRM_INFO("size %lu\n", (unsigned long)size);
280         DRM_INFO("fb depth is %d\n", fb->depth);
281         DRM_INFO("   pitch is %d\n", fb->pitch);
282
283         fb->fbdev = info;
284         rfbdev->rfb = rfb;
285         rfbdev->rdev = rdev;
286
287         mutex_unlock(&rdev->ddev->struct_mutex);
288         return 0;
289
290 out_unref:
291         if (robj) {
292                 radeon_object_kunmap(robj);
293         }
294         if (fb && ret) {
295                 list_del(&fb->filp_head);
296                 drm_gem_object_unreference(gobj);
297                 drm_framebuffer_cleanup(fb);
298                 kfree(fb);
299         }
300         drm_gem_object_unreference(gobj);
301         mutex_unlock(&rdev->ddev->struct_mutex);
302 out:
303         return ret;
304 }
305
306 static char *mode_option;
307 int radeon_parse_options(char *options)
308 {
309         char *this_opt;
310
311         if (!options || !*options)
312                 return 0;
313
314         while ((this_opt = strsep(&options, ",")) != NULL) {
315                 if (!*this_opt)
316                         continue;
317                 mode_option = this_opt;
318         }
319         return 0;
320 }
321
322 int radeonfb_probe(struct drm_device *dev)
323 {
324         return drm_fb_helper_single_fb_probe(dev, 32, &radeonfb_create);
325 }
326
327 int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
328 {
329         struct fb_info *info;
330         struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
331         struct radeon_object *robj;
332
333         if (!fb) {
334                 return -EINVAL;
335         }
336         info = fb->fbdev;
337         if (info) {
338                 struct radeon_fb_device *rfbdev = info->par;
339                 robj = rfb->obj->driver_private;
340                 unregister_framebuffer(info);
341                 radeon_object_kunmap(robj);
342                 radeon_object_unpin(robj);
343                 drm_fb_helper_free(&rfbdev->helper);
344                 framebuffer_release(info);
345         }
346
347         printk(KERN_INFO "unregistered panic notifier\n");
348
349         return 0;
350 }
351 EXPORT_SYMBOL(radeonfb_remove);
352 MODULE_LICENSE("GPL");