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