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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/pm_runtime.h>
29#include <linux/slab.h>
30#include <linux/vga_switcheroo.h>
31
32#include <drm/drm_crtc.h>
33#include <drm/drm_crtc_helper.h>
34#include <drm/drm_fb_helper.h>
35#include <drm/drm_fourcc.h>
36#include <drm/drm_pci.h>
37#include <drm/radeon_drm.h>
38
39#include "radeon.h"
40
41/* object hierarchy -
42 * this contains a helper + a radeon fb
43 * the helper contains a pointer to radeon framebuffer baseclass.
44 */
45struct radeon_fbdev {
46 struct drm_fb_helper helper; /* must be first */
47 struct drm_framebuffer fb;
48 struct radeon_device *rdev;
49};
50
51static int
52radeonfb_open(struct fb_info *info, int user)
53{
54 struct radeon_fbdev *rfbdev = info->par;
55 struct radeon_device *rdev = rfbdev->rdev;
56 int ret = pm_runtime_get_sync(rdev->ddev->dev);
57 if (ret < 0 && ret != -EACCES) {
58 pm_runtime_mark_last_busy(rdev->ddev->dev);
59 pm_runtime_put_autosuspend(rdev->ddev->dev);
60 return ret;
61 }
62 return 0;
63}
64
65static int
66radeonfb_release(struct fb_info *info, int user)
67{
68 struct radeon_fbdev *rfbdev = info->par;
69 struct radeon_device *rdev = rfbdev->rdev;
70
71 pm_runtime_mark_last_busy(rdev->ddev->dev);
72 pm_runtime_put_autosuspend(rdev->ddev->dev);
73 return 0;
74}
75
76static struct fb_ops radeonfb_ops = {
77 .owner = THIS_MODULE,
78 DRM_FB_HELPER_DEFAULT_OPS,
79 .fb_open = radeonfb_open,
80 .fb_release = radeonfb_release,
81 .fb_fillrect = drm_fb_helper_cfb_fillrect,
82 .fb_copyarea = drm_fb_helper_cfb_copyarea,
83 .fb_imageblit = drm_fb_helper_cfb_imageblit,
84};
85
86
87int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
88{
89 int aligned = width;
90 int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
91 int pitch_mask = 0;
92
93 switch (cpp) {
94 case 1:
95 pitch_mask = align_large ? 255 : 127;
96 break;
97 case 2:
98 pitch_mask = align_large ? 127 : 31;
99 break;
100 case 3:
101 case 4:
102 pitch_mask = align_large ? 63 : 15;
103 break;
104 }
105
106 aligned += pitch_mask;
107 aligned &= ~pitch_mask;
108 return aligned * cpp;
109}
110
111static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
112{
113 struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
114 int ret;
115
116 ret = radeon_bo_reserve(rbo, false);
117 if (likely(ret == 0)) {
118 radeon_bo_kunmap(rbo);
119 radeon_bo_unpin(rbo);
120 radeon_bo_unreserve(rbo);
121 }
122 drm_gem_object_put_unlocked(gobj);
123}
124
125static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
126 struct drm_mode_fb_cmd2 *mode_cmd,
127 struct drm_gem_object **gobj_p)
128{
129 const struct drm_format_info *info;
130 struct radeon_device *rdev = rfbdev->rdev;
131 struct drm_gem_object *gobj = NULL;
132 struct radeon_bo *rbo = NULL;
133 bool fb_tiled = false; /* useful for testing */
134 u32 tiling_flags = 0;
135 int ret;
136 int aligned_size, size;
137 int height = mode_cmd->height;
138 u32 cpp;
139
140 info = drm_get_format_info(rdev->ddev, mode_cmd);
141 cpp = info->cpp[0];
142
143 /* need to align pitch with crtc limits */
144 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
145 fb_tiled);
146
147 if (rdev->family >= CHIP_R600)
148 height = ALIGN(mode_cmd->height, 8);
149 size = mode_cmd->pitches[0] * height;
150 aligned_size = ALIGN(size, PAGE_SIZE);
151 ret = radeon_gem_object_create(rdev, aligned_size, 0,
152 RADEON_GEM_DOMAIN_VRAM,
153 0, true, &gobj);
154 if (ret) {
155 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
156 return -ENOMEM;
157 }
158 rbo = gem_to_radeon_bo(gobj);
159
160 if (fb_tiled)
161 tiling_flags = RADEON_TILING_MACRO;
162
163#ifdef __BIG_ENDIAN
164 switch (cpp) {
165 case 4:
166 tiling_flags |= RADEON_TILING_SWAP_32BIT;
167 break;
168 case 2:
169 tiling_flags |= RADEON_TILING_SWAP_16BIT;
170 default:
171 break;
172 }
173#endif
174
175 if (tiling_flags) {
176 ret = radeon_bo_set_tiling_flags(rbo,
177 tiling_flags | RADEON_TILING_SURFACE,
178 mode_cmd->pitches[0]);
179 if (ret)
180 dev_err(rdev->dev, "FB failed to set tiling flags\n");
181 }
182
183
184 ret = radeon_bo_reserve(rbo, false);
185 if (unlikely(ret != 0))
186 goto out_unref;
187 /* Only 27 bit offset for legacy CRTC */
188 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
189 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
190 NULL);
191 if (ret) {
192 radeon_bo_unreserve(rbo);
193 goto out_unref;
194 }
195 if (fb_tiled)
196 radeon_bo_check_tiling(rbo, 0, 0);
197 ret = radeon_bo_kmap(rbo, NULL);
198 radeon_bo_unreserve(rbo);
199 if (ret) {
200 goto out_unref;
201 }
202
203 *gobj_p = gobj;
204 return 0;
205out_unref:
206 radeonfb_destroy_pinned_object(gobj);
207 *gobj_p = NULL;
208 return ret;
209}
210
211static int radeonfb_create(struct drm_fb_helper *helper,
212 struct drm_fb_helper_surface_size *sizes)
213{
214 struct radeon_fbdev *rfbdev =
215 container_of(helper, struct radeon_fbdev, helper);
216 struct radeon_device *rdev = rfbdev->rdev;
217 struct fb_info *info;
218 struct drm_framebuffer *fb = NULL;
219 struct drm_mode_fb_cmd2 mode_cmd;
220 struct drm_gem_object *gobj = NULL;
221 struct radeon_bo *rbo = NULL;
222 int ret;
223 unsigned long tmp;
224
225 mode_cmd.width = sizes->surface_width;
226 mode_cmd.height = sizes->surface_height;
227
228 /* avivo can't scanout real 24bpp */
229 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
230 sizes->surface_bpp = 32;
231
232 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
233 sizes->surface_depth);
234
235 ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
236 if (ret) {
237 DRM_ERROR("failed to create fbcon object %d\n", ret);
238 return ret;
239 }
240
241 rbo = gem_to_radeon_bo(gobj);
242
243 /* okay we have an object now allocate the framebuffer */
244 info = drm_fb_helper_alloc_fbi(helper);
245 if (IS_ERR(info)) {
246 ret = PTR_ERR(info);
247 goto out;
248 }
249
250 /* radeon resume is fragile and needs a vt switch to help it along */
251 info->skip_vt_switch = false;
252
253 ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
254 if (ret) {
255 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
256 goto out;
257 }
258
259 fb = &rfbdev->fb;
260
261 /* setup helper */
262 rfbdev->helper.fb = fb;
263
264 memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
265
266 info->fbops = &radeonfb_ops;
267
268 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
269 info->fix.smem_start = rdev->mc.aper_base + tmp;
270 info->fix.smem_len = radeon_bo_size(rbo);
271 info->screen_base = rbo->kptr;
272 info->screen_size = radeon_bo_size(rbo);
273
274 drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
275
276 /* setup aperture base/size for vesafb takeover */
277 info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
278 info->apertures->ranges[0].size = rdev->mc.aper_size;
279
280 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
281
282 if (info->screen_base == NULL) {
283 ret = -ENOSPC;
284 goto out;
285 }
286
287 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
288 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
289 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
290 DRM_INFO("fb depth is %d\n", fb->format->depth);
291 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
292
293 vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
294 return 0;
295
296out:
297 if (rbo) {
298
299 }
300 if (fb && ret) {
301 drm_gem_object_put_unlocked(gobj);
302 drm_framebuffer_unregister_private(fb);
303 drm_framebuffer_cleanup(fb);
304 kfree(fb);
305 }
306 return ret;
307}
308
309static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
310{
311 struct drm_framebuffer *fb = &rfbdev->fb;
312
313 drm_fb_helper_unregister_fbi(&rfbdev->helper);
314
315 if (fb->obj[0]) {
316 radeonfb_destroy_pinned_object(fb->obj[0]);
317 fb->obj[0] = NULL;
318 drm_framebuffer_unregister_private(fb);
319 drm_framebuffer_cleanup(fb);
320 }
321 drm_fb_helper_fini(&rfbdev->helper);
322
323 return 0;
324}
325
326static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
327 .fb_probe = radeonfb_create,
328};
329
330int radeon_fbdev_init(struct radeon_device *rdev)
331{
332 struct radeon_fbdev *rfbdev;
333 int bpp_sel = 32;
334 int ret;
335
336 /* don't enable fbdev if no connectors */
337 if (list_empty(&rdev->ddev->mode_config.connector_list))
338 return 0;
339
340 /* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
341 if (rdev->mc.real_vram_size <= (8*1024*1024))
342 bpp_sel = 8;
343 else if (ASIC_IS_RN50(rdev) ||
344 rdev->mc.real_vram_size <= (32*1024*1024))
345 bpp_sel = 16;
346
347 rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
348 if (!rfbdev)
349 return -ENOMEM;
350
351 rfbdev->rdev = rdev;
352 rdev->mode_info.rfbdev = rfbdev;
353
354 drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
355 &radeon_fb_helper_funcs);
356
357 ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
358 RADEONFB_CONN_LIMIT);
359 if (ret)
360 goto free;
361
362 ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
363 if (ret)
364 goto fini;
365
366 /* disable all the possible outputs/crtcs before entering KMS mode */
367 drm_helper_disable_unused_functions(rdev->ddev);
368
369 ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
370 if (ret)
371 goto fini;
372
373 return 0;
374
375fini:
376 drm_fb_helper_fini(&rfbdev->helper);
377free:
378 kfree(rfbdev);
379 return ret;
380}
381
382void radeon_fbdev_fini(struct radeon_device *rdev)
383{
384 if (!rdev->mode_info.rfbdev)
385 return;
386
387 radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
388 kfree(rdev->mode_info.rfbdev);
389 rdev->mode_info.rfbdev = NULL;
390}
391
392void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
393{
394 if (rdev->mode_info.rfbdev)
395 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
396}
397
398bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
399{
400 if (!rdev->mode_info.rfbdev)
401 return false;
402
403 if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->fb.obj[0]))
404 return true;
405 return false;
406}
407
408void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
409{
410 if (rdev->mode_info.rfbdev)
411 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
412}
413
414void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
415{
416 if (rdev->mode_info.rfbdev)
417 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
418}