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/amdgpu_drm.h>
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
38 #include "amdgpu.h"
39 #include "cikd.h"
40 #include "amdgpu_gem.h"
41
42 #include "amdgpu_display.h"
43
44 /* object hierarchy -
45 this contains a helper + a amdgpu fb
46 the helper contains a pointer to amdgpu framebuffer baseclass.
47 */
48
49 static int
amdgpufb_open(struct fb_info * info,int user)50 amdgpufb_open(struct fb_info *info, int user)
51 {
52 struct drm_fb_helper *fb_helper = info->par;
53 int ret = pm_runtime_get_sync(fb_helper->dev->dev);
54 if (ret < 0 && ret != -EACCES) {
55 pm_runtime_mark_last_busy(fb_helper->dev->dev);
56 pm_runtime_put_autosuspend(fb_helper->dev->dev);
57 return ret;
58 }
59 return 0;
60 }
61
62 static int
amdgpufb_release(struct fb_info * info,int user)63 amdgpufb_release(struct fb_info *info, int user)
64 {
65 struct drm_fb_helper *fb_helper = info->par;
66
67 pm_runtime_mark_last_busy(fb_helper->dev->dev);
68 pm_runtime_put_autosuspend(fb_helper->dev->dev);
69 return 0;
70 }
71
72 static struct fb_ops amdgpufb_ops = {
73 .owner = THIS_MODULE,
74 DRM_FB_HELPER_DEFAULT_OPS,
75 .fb_open = amdgpufb_open,
76 .fb_release = amdgpufb_release,
77 .fb_fillrect = drm_fb_helper_cfb_fillrect,
78 .fb_copyarea = drm_fb_helper_cfb_copyarea,
79 .fb_imageblit = drm_fb_helper_cfb_imageblit,
80 };
81
82
amdgpu_align_pitch(struct amdgpu_device * adev,int width,int cpp,bool tiled)83 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
84 {
85 int aligned = width;
86 int pitch_mask = 0;
87
88 switch (cpp) {
89 case 1:
90 pitch_mask = 255;
91 break;
92 case 2:
93 pitch_mask = 127;
94 break;
95 case 3:
96 case 4:
97 pitch_mask = 63;
98 break;
99 }
100
101 aligned += pitch_mask;
102 aligned &= ~pitch_mask;
103 return aligned * cpp;
104 }
105
amdgpufb_destroy_pinned_object(struct drm_gem_object * gobj)106 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
107 {
108 struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
109 int ret;
110
111 ret = amdgpu_bo_reserve(abo, true);
112 if (likely(ret == 0)) {
113 amdgpu_bo_kunmap(abo);
114 amdgpu_bo_unpin(abo);
115 amdgpu_bo_unreserve(abo);
116 }
117 drm_gem_object_put_unlocked(gobj);
118 }
119
amdgpufb_create_pinned_object(struct amdgpu_fbdev * rfbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)120 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
121 struct drm_mode_fb_cmd2 *mode_cmd,
122 struct drm_gem_object **gobj_p)
123 {
124 const struct drm_format_info *info;
125 struct amdgpu_device *adev = rfbdev->adev;
126 struct drm_gem_object *gobj = NULL;
127 struct amdgpu_bo *abo = NULL;
128 bool fb_tiled = false; /* useful for testing */
129 u32 tiling_flags = 0, domain;
130 int ret;
131 int aligned_size, size;
132 int height = mode_cmd->height;
133 u32 cpp;
134 u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
135 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
136 AMDGPU_GEM_CREATE_VRAM_CLEARED |
137 AMDGPU_GEM_CREATE_CPU_GTT_USWC;
138
139 info = drm_get_format_info(adev->ddev, mode_cmd);
140 cpp = info->cpp[0];
141
142 /* need to align pitch with crtc limits */
143 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
144 fb_tiled);
145 domain = amdgpu_display_supported_domains(adev, flags);
146 height = ALIGN(mode_cmd->height, 8);
147 size = mode_cmd->pitches[0] * height;
148 aligned_size = ALIGN(size, PAGE_SIZE);
149 ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain, flags,
150 ttm_bo_type_kernel, NULL, &gobj);
151 if (ret) {
152 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
153 return -ENOMEM;
154 }
155 abo = gem_to_amdgpu_bo(gobj);
156
157 if (fb_tiled)
158 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
159
160 ret = amdgpu_bo_reserve(abo, false);
161 if (unlikely(ret != 0))
162 goto out_unref;
163
164 if (tiling_flags) {
165 ret = amdgpu_bo_set_tiling_flags(abo,
166 tiling_flags);
167 if (ret)
168 dev_err(adev->dev, "FB failed to set tiling flags\n");
169 }
170
171 ret = amdgpu_bo_pin(abo, domain);
172 if (ret) {
173 amdgpu_bo_unreserve(abo);
174 goto out_unref;
175 }
176
177 ret = amdgpu_ttm_alloc_gart(&abo->tbo);
178 if (ret) {
179 amdgpu_bo_unreserve(abo);
180 dev_err(adev->dev, "%p bind failed\n", abo);
181 goto out_unref;
182 }
183
184 ret = amdgpu_bo_kmap(abo, NULL);
185 amdgpu_bo_unreserve(abo);
186 if (ret) {
187 goto out_unref;
188 }
189
190 *gobj_p = gobj;
191 return 0;
192 out_unref:
193 amdgpufb_destroy_pinned_object(gobj);
194 *gobj_p = NULL;
195 return ret;
196 }
197
amdgpufb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)198 static int amdgpufb_create(struct drm_fb_helper *helper,
199 struct drm_fb_helper_surface_size *sizes)
200 {
201 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
202 struct amdgpu_device *adev = rfbdev->adev;
203 struct fb_info *info;
204 struct drm_framebuffer *fb = NULL;
205 struct drm_mode_fb_cmd2 mode_cmd;
206 struct drm_gem_object *gobj = NULL;
207 struct amdgpu_bo *abo = NULL;
208 int ret;
209 unsigned long tmp;
210
211 mode_cmd.width = sizes->surface_width;
212 mode_cmd.height = sizes->surface_height;
213
214 if (sizes->surface_bpp == 24)
215 sizes->surface_bpp = 32;
216
217 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
218 sizes->surface_depth);
219
220 ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
221 if (ret) {
222 DRM_ERROR("failed to create fbcon object %d\n", ret);
223 return ret;
224 }
225
226 abo = gem_to_amdgpu_bo(gobj);
227
228 /* okay we have an object now allocate the framebuffer */
229 info = drm_fb_helper_alloc_fbi(helper);
230 if (IS_ERR(info)) {
231 ret = PTR_ERR(info);
232 goto out;
233 }
234
235 ret = amdgpu_display_framebuffer_init(adev->ddev, &rfbdev->rfb,
236 &mode_cmd, gobj);
237 if (ret) {
238 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
239 goto out;
240 }
241
242 fb = &rfbdev->rfb.base;
243
244 /* setup helper */
245 rfbdev->helper.fb = fb;
246
247 info->fbops = &amdgpufb_ops;
248
249 tmp = amdgpu_bo_gpu_offset(abo) - adev->gmc.vram_start;
250 info->fix.smem_start = adev->gmc.aper_base + tmp;
251 info->fix.smem_len = amdgpu_bo_size(abo);
252 info->screen_base = amdgpu_bo_kptr(abo);
253 info->screen_size = amdgpu_bo_size(abo);
254
255 drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
256
257 /* setup aperture base/size for vesafb takeover */
258 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
259 info->apertures->ranges[0].size = adev->gmc.aper_size;
260
261 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
262
263 if (info->screen_base == NULL) {
264 ret = -ENOSPC;
265 goto out;
266 }
267
268 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
269 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->gmc.aper_base);
270 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
271 DRM_INFO("fb depth is %d\n", fb->format->depth);
272 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
273
274 vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
275 return 0;
276
277 out:
278 if (abo) {
279
280 }
281 if (fb && ret) {
282 drm_gem_object_put_unlocked(gobj);
283 drm_framebuffer_unregister_private(fb);
284 drm_framebuffer_cleanup(fb);
285 kfree(fb);
286 }
287 return ret;
288 }
289
amdgpu_fbdev_destroy(struct drm_device * dev,struct amdgpu_fbdev * rfbdev)290 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
291 {
292 struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
293
294 drm_fb_helper_unregister_fbi(&rfbdev->helper);
295
296 if (rfb->base.obj[0]) {
297 amdgpufb_destroy_pinned_object(rfb->base.obj[0]);
298 rfb->base.obj[0] = NULL;
299 drm_framebuffer_unregister_private(&rfb->base);
300 drm_framebuffer_cleanup(&rfb->base);
301 }
302 drm_fb_helper_fini(&rfbdev->helper);
303
304 return 0;
305 }
306
307 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
308 .fb_probe = amdgpufb_create,
309 };
310
amdgpu_fbdev_init(struct amdgpu_device * adev)311 int amdgpu_fbdev_init(struct amdgpu_device *adev)
312 {
313 struct amdgpu_fbdev *rfbdev;
314 int bpp_sel = 32;
315 int ret;
316
317 /* don't init fbdev on hw without DCE */
318 if (!adev->mode_info.mode_config_initialized)
319 return 0;
320
321 /* don't init fbdev if there are no connectors */
322 if (list_empty(&adev->ddev->mode_config.connector_list))
323 return 0;
324
325 /* select 8 bpp console on low vram cards */
326 if (adev->gmc.real_vram_size <= (32*1024*1024))
327 bpp_sel = 8;
328
329 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
330 if (!rfbdev)
331 return -ENOMEM;
332
333 rfbdev->adev = adev;
334 adev->mode_info.rfbdev = rfbdev;
335
336 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
337 &amdgpu_fb_helper_funcs);
338
339 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
340 AMDGPUFB_CONN_LIMIT);
341 if (ret) {
342 kfree(rfbdev);
343 return ret;
344 }
345
346 drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
347
348 /* disable all the possible outputs/crtcs before entering KMS mode */
349 if (!amdgpu_device_has_dc_support(adev))
350 drm_helper_disable_unused_functions(adev->ddev);
351
352 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
353 return 0;
354 }
355
amdgpu_fbdev_fini(struct amdgpu_device * adev)356 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
357 {
358 if (!adev->mode_info.rfbdev)
359 return;
360
361 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
362 kfree(adev->mode_info.rfbdev);
363 adev->mode_info.rfbdev = NULL;
364 }
365
amdgpu_fbdev_set_suspend(struct amdgpu_device * adev,int state)366 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
367 {
368 if (adev->mode_info.rfbdev)
369 drm_fb_helper_set_suspend_unlocked(&adev->mode_info.rfbdev->helper,
370 state);
371 }
372
amdgpu_fbdev_total_size(struct amdgpu_device * adev)373 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
374 {
375 struct amdgpu_bo *robj;
376 int size = 0;
377
378 if (!adev->mode_info.rfbdev)
379 return 0;
380
381 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]);
382 size += amdgpu_bo_size(robj);
383 return size;
384 }
385
amdgpu_fbdev_robj_is_fb(struct amdgpu_device * adev,struct amdgpu_bo * robj)386 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
387 {
388 if (!adev->mode_info.rfbdev)
389 return false;
390 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]))
391 return true;
392 return false;
393 }
394
