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