Merge branch 'for-davem' of ssh://master.kernel.org/pub/scm/linux/kernel/git/linville...
[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 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/fb.h>
29
30 #include "drmP.h"
31 #include "drm.h"
32 #include "drm_crtc.h"
33 #include "drm_crtc_helper.h"
34 #include "radeon_drm.h"
35 #include "radeon.h"
36
37 #include "drm_fb_helper.h"
38
39 #include <linux/vga_switcheroo.h>
40
41 /* object hierarchy -
42    this contains a helper + a radeon fb
43    the helper contains a pointer to radeon framebuffer baseclass.
44 */
45 struct radeon_fbdev {
46         struct drm_fb_helper helper;
47         struct radeon_framebuffer rfb;
48         struct list_head fbdev_list;
49         struct radeon_device *rdev;
50 };
51
52 static struct fb_ops radeonfb_ops = {
53         .owner = THIS_MODULE,
54         .fb_check_var = drm_fb_helper_check_var,
55         .fb_set_par = drm_fb_helper_set_par,
56         .fb_fillrect = cfb_fillrect,
57         .fb_copyarea = cfb_copyarea,
58         .fb_imageblit = cfb_imageblit,
59         .fb_pan_display = drm_fb_helper_pan_display,
60         .fb_blank = drm_fb_helper_blank,
61         .fb_setcmap = drm_fb_helper_setcmap,
62         .fb_debug_enter = drm_fb_helper_debug_enter,
63         .fb_debug_leave = drm_fb_helper_debug_leave,
64 };
65
66
67 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
68 {
69         int aligned = width;
70         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
71         int pitch_mask = 0;
72
73         switch (bpp / 8) {
74         case 1:
75                 pitch_mask = align_large ? 255 : 127;
76                 break;
77         case 2:
78                 pitch_mask = align_large ? 127 : 31;
79                 break;
80         case 3:
81         case 4:
82                 pitch_mask = align_large ? 63 : 15;
83                 break;
84         }
85
86         aligned += pitch_mask;
87         aligned &= ~pitch_mask;
88         return aligned;
89 }
90
91 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
92 {
93         struct radeon_bo *rbo = gobj->driver_private;
94         int ret;
95
96         ret = radeon_bo_reserve(rbo, false);
97         if (likely(ret == 0)) {
98                 radeon_bo_kunmap(rbo);
99                 radeon_bo_unpin(rbo);
100                 radeon_bo_unreserve(rbo);
101         }
102         drm_gem_object_unreference_unlocked(gobj);
103 }
104
105 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
106                                          struct drm_mode_fb_cmd *mode_cmd,
107                                          struct drm_gem_object **gobj_p)
108 {
109         struct radeon_device *rdev = rfbdev->rdev;
110         struct drm_gem_object *gobj = NULL;
111         struct radeon_bo *rbo = NULL;
112         bool fb_tiled = false; /* useful for testing */
113         u32 tiling_flags = 0;
114         int ret;
115         int aligned_size, size;
116         int height = mode_cmd->height;
117
118         /* need to align pitch with crtc limits */
119         mode_cmd->pitch = radeon_align_pitch(rdev, mode_cmd->width, mode_cmd->bpp, fb_tiled) * ((mode_cmd->bpp + 1) / 8);
120
121         if (rdev->family >= CHIP_R600)
122                 height = ALIGN(mode_cmd->height, 8);
123         size = mode_cmd->pitch * height;
124         aligned_size = ALIGN(size, PAGE_SIZE);
125         ret = radeon_gem_object_create(rdev, aligned_size, 0,
126                                        RADEON_GEM_DOMAIN_VRAM,
127                                        false, true,
128                                        &gobj);
129         if (ret) {
130                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
131                        aligned_size);
132                 return -ENOMEM;
133         }
134         rbo = gobj->driver_private;
135
136         if (fb_tiled)
137                 tiling_flags = RADEON_TILING_MACRO;
138
139 #ifdef __BIG_ENDIAN
140         switch (mode_cmd->bpp) {
141         case 32:
142                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
143                 break;
144         case 16:
145                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
146         default:
147                 break;
148         }
149 #endif
150
151         if (tiling_flags) {
152                 ret = radeon_bo_set_tiling_flags(rbo,
153                                                  tiling_flags | RADEON_TILING_SURFACE,
154                                                  mode_cmd->pitch);
155                 if (ret)
156                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
157         }
158
159
160         ret = radeon_bo_reserve(rbo, false);
161         if (unlikely(ret != 0))
162                 goto out_unref;
163         ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);
164         if (ret) {
165                 radeon_bo_unreserve(rbo);
166                 goto out_unref;
167         }
168         if (fb_tiled)
169                 radeon_bo_check_tiling(rbo, 0, 0);
170         ret = radeon_bo_kmap(rbo, NULL);
171         radeon_bo_unreserve(rbo);
172         if (ret) {
173                 goto out_unref;
174         }
175
176         *gobj_p = gobj;
177         return 0;
178 out_unref:
179         radeonfb_destroy_pinned_object(gobj);
180         *gobj_p = NULL;
181         return ret;
182 }
183
184 static int radeonfb_create(struct radeon_fbdev *rfbdev,
185                            struct drm_fb_helper_surface_size *sizes)
186 {
187         struct radeon_device *rdev = rfbdev->rdev;
188         struct fb_info *info;
189         struct drm_framebuffer *fb = NULL;
190         struct drm_mode_fb_cmd mode_cmd;
191         struct drm_gem_object *gobj = NULL;
192         struct radeon_bo *rbo = NULL;
193         struct device *device = &rdev->pdev->dev;
194         int ret;
195         unsigned long tmp;
196
197         mode_cmd.width = sizes->surface_width;
198         mode_cmd.height = sizes->surface_height;
199
200         /* avivo can't scanout real 24bpp */
201         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
202                 sizes->surface_bpp = 32;
203
204         mode_cmd.bpp = sizes->surface_bpp;
205         mode_cmd.depth = sizes->surface_depth;
206
207         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
208         rbo = gobj->driver_private;
209
210         /* okay we have an object now allocate the framebuffer */
211         info = framebuffer_alloc(0, device);
212         if (info == NULL) {
213                 ret = -ENOMEM;
214                 goto out_unref;
215         }
216
217         info->par = rfbdev;
218
219         radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
220
221         fb = &rfbdev->rfb.base;
222
223         /* setup helper */
224         rfbdev->helper.fb = fb;
225         rfbdev->helper.fbdev = info;
226
227         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
228
229         strcpy(info->fix.id, "radeondrmfb");
230
231         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
232
233         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
234         info->fbops = &radeonfb_ops;
235
236         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
237         info->fix.smem_start = rdev->mc.aper_base + tmp;
238         info->fix.smem_len = radeon_bo_size(rbo);
239         info->screen_base = rbo->kptr;
240         info->screen_size = radeon_bo_size(rbo);
241
242         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
243
244         /* setup aperture base/size for vesafb takeover */
245         info->apertures = alloc_apertures(1);
246         if (!info->apertures) {
247                 ret = -ENOMEM;
248                 goto out_unref;
249         }
250         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
251         info->apertures->ranges[0].size = rdev->mc.aper_size;
252
253         info->pixmap.size = 64*1024;
254         info->pixmap.buf_align = 8;
255         info->pixmap.access_align = 32;
256         info->pixmap.flags = FB_PIXMAP_SYSTEM;
257         info->pixmap.scan_align = 1;
258
259         if (info->screen_base == NULL) {
260                 ret = -ENOSPC;
261                 goto out_unref;
262         }
263
264         ret = fb_alloc_cmap(&info->cmap, 256, 0);
265         if (ret) {
266                 ret = -ENOMEM;
267                 goto out_unref;
268         }
269
270         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
271         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
272         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
273         DRM_INFO("fb depth is %d\n", fb->depth);
274         DRM_INFO("   pitch is %d\n", fb->pitch);
275
276         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
277         return 0;
278
279 out_unref:
280         if (rbo) {
281
282         }
283         if (fb && ret) {
284                 drm_gem_object_unreference(gobj);
285                 drm_framebuffer_cleanup(fb);
286                 kfree(fb);
287         }
288         return ret;
289 }
290
291 static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,
292                                            struct drm_fb_helper_surface_size *sizes)
293 {
294         struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;
295         int new_fb = 0;
296         int ret;
297
298         if (!helper->fb) {
299                 ret = radeonfb_create(rfbdev, sizes);
300                 if (ret)
301                         return ret;
302                 new_fb = 1;
303         }
304         return new_fb;
305 }
306
307 static char *mode_option;
308 int radeon_parse_options(char *options)
309 {
310         char *this_opt;
311
312         if (!options || !*options)
313                 return 0;
314
315         while ((this_opt = strsep(&options, ",")) != NULL) {
316                 if (!*this_opt)
317                         continue;
318                 mode_option = this_opt;
319         }
320         return 0;
321 }
322
323 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
324 {
325         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
326 }
327
328 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
329 {
330         struct fb_info *info;
331         struct radeon_framebuffer *rfb = &rfbdev->rfb;
332
333         if (rfbdev->helper.fbdev) {
334                 info = rfbdev->helper.fbdev;
335
336                 unregister_framebuffer(info);
337                 if (info->cmap.len)
338                         fb_dealloc_cmap(&info->cmap);
339                 framebuffer_release(info);
340         }
341
342         if (rfb->obj) {
343                 radeonfb_destroy_pinned_object(rfb->obj);
344                 rfb->obj = NULL;
345         }
346         drm_fb_helper_fini(&rfbdev->helper);
347         drm_framebuffer_cleanup(&rfb->base);
348
349         return 0;
350 }
351
352 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
353         .gamma_set = radeon_crtc_fb_gamma_set,
354         .gamma_get = radeon_crtc_fb_gamma_get,
355         .fb_probe = radeon_fb_find_or_create_single,
356 };
357
358 int radeon_fbdev_init(struct radeon_device *rdev)
359 {
360         struct radeon_fbdev *rfbdev;
361         int bpp_sel = 32;
362         int ret;
363
364         /* select 8 bpp console on RN50 or 16MB cards */
365         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
366                 bpp_sel = 8;
367
368         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
369         if (!rfbdev)
370                 return -ENOMEM;
371
372         rfbdev->rdev = rdev;
373         rdev->mode_info.rfbdev = rfbdev;
374         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
375
376         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
377                                  rdev->num_crtc,
378                                  RADEONFB_CONN_LIMIT);
379         if (ret) {
380                 kfree(rfbdev);
381                 return ret;
382         }
383
384         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
385         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
386         return 0;
387 }
388
389 void radeon_fbdev_fini(struct radeon_device *rdev)
390 {
391         if (!rdev->mode_info.rfbdev)
392                 return;
393
394         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
395         kfree(rdev->mode_info.rfbdev);
396         rdev->mode_info.rfbdev = NULL;
397 }
398
399 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
400 {
401         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
402 }
403
404 int radeon_fbdev_total_size(struct radeon_device *rdev)
405 {
406         struct radeon_bo *robj;
407         int size = 0;
408
409         robj = rdev->mode_info.rfbdev->rfb.obj->driver_private;
410         size += radeon_bo_size(robj);
411         return size;
412 }
413
414 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
415 {
416         if (robj == rdev->mode_info.rfbdev->rfb.obj->driver_private)
417                 return true;
418         return false;
419 }