1 /* $NetBSD: amdgpu_fb.c,v 1.11 2021/12/20 20:34:58 chs Exp $ */
2
3 /*
4 * Copyright © 2007 David Airlie
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * David Airlie
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: amdgpu_fb.c,v 1.11 2021/12/20 20:34:58 chs Exp $");
31
32 #include <linux/module.h>
33 #include <linux/pm_runtime.h>
34 #include <linux/slab.h>
35 #include <linux/vga_switcheroo.h>
36
37 #include <drm/amdgpu_drm.h>
38 #include <drm/drm_crtc.h>
39 #include <drm/drm_crtc_helper.h>
40 #include <drm/drm_fb_helper.h>
41 #include <drm/drm_fourcc.h>
42
43 #include "amdgpu.h"
44 #include "cikd.h"
45 #include "amdgpu_gem.h"
46
47 #include "amdgpu_display.h"
48
49 #ifdef __NetBSD__
50 #include "amdgpufb.h"
51 #endif
52
53 #include <linux/nbsd-namespace.h>
54
55 /* object hierarchy -
56 this contains a helper + a amdgpu fb
57 the helper contains a pointer to amdgpu framebuffer baseclass.
58 */
59
60 #ifndef __NetBSD__
61
62 static int
amdgpufb_open(struct fb_info * info,int user)63 amdgpufb_open(struct fb_info *info, int user)
64 {
65 struct drm_fb_helper *fb_helper = info->par;
66 int ret = pm_runtime_get_sync(fb_helper->dev->dev);
67 if (ret < 0 && ret != -EACCES) {
68 pm_runtime_mark_last_busy(fb_helper->dev->dev);
69 pm_runtime_put_autosuspend(fb_helper->dev->dev);
70 return ret;
71 }
72 return 0;
73 }
74
75 static int
amdgpufb_release(struct fb_info * info,int user)76 amdgpufb_release(struct fb_info *info, int user)
77 {
78 struct drm_fb_helper *fb_helper = info->par;
79
80 pm_runtime_mark_last_busy(fb_helper->dev->dev);
81 pm_runtime_put_autosuspend(fb_helper->dev->dev);
82 return 0;
83 }
84
85 static const struct fb_ops amdgpufb_ops = {
86 .owner = THIS_MODULE,
87 DRM_FB_HELPER_DEFAULT_OPS,
88 .fb_open = amdgpufb_open,
89 .fb_release = amdgpufb_release,
90 .fb_fillrect = drm_fb_helper_cfb_fillrect,
91 .fb_copyarea = drm_fb_helper_cfb_copyarea,
92 .fb_imageblit = drm_fb_helper_cfb_imageblit,
93 };
94
95 #endif
96
97
amdgpu_align_pitch(struct amdgpu_device * adev,int width,int cpp,bool tiled)98 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
99 {
100 int aligned = width;
101 int pitch_mask = 0;
102
103 switch (cpp) {
104 case 1:
105 pitch_mask = 255;
106 break;
107 case 2:
108 pitch_mask = 127;
109 break;
110 case 3:
111 case 4:
112 pitch_mask = 63;
113 break;
114 }
115
116 aligned += pitch_mask;
117 aligned &= ~pitch_mask;
118 return aligned * cpp;
119 }
120
amdgpufb_destroy_pinned_object(struct drm_gem_object * gobj)121 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
122 {
123 struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
124 int ret;
125
126 ret = amdgpu_bo_reserve(abo, true);
127 if (likely(ret == 0)) {
128 amdgpu_bo_kunmap(abo);
129 amdgpu_bo_unpin(abo);
130 amdgpu_bo_unreserve(abo);
131 }
132 drm_gem_object_put_unlocked(gobj);
133 }
134
amdgpufb_create_pinned_object(struct amdgpu_fbdev * rfbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)135 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
136 struct drm_mode_fb_cmd2 *mode_cmd,
137 struct drm_gem_object **gobj_p)
138 {
139 const struct drm_format_info *info;
140 struct amdgpu_device *adev = rfbdev->adev;
141 struct drm_gem_object *gobj = NULL;
142 struct amdgpu_bo *abo = NULL;
143 bool fb_tiled = false; /* useful for testing */
144 u32 tiling_flags = 0, domain;
145 int ret;
146 int aligned_size, size;
147 int height = mode_cmd->height;
148 u32 cpp;
149 u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
150 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
151 AMDGPU_GEM_CREATE_VRAM_CLEARED |
152 AMDGPU_GEM_CREATE_CPU_GTT_USWC;
153
154 info = drm_get_format_info(adev->ddev, mode_cmd);
155 cpp = info->cpp[0];
156
157 /* need to align pitch with crtc limits */
158 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
159 fb_tiled);
160 domain = amdgpu_display_supported_domains(adev, flags);
161 height = ALIGN(mode_cmd->height, 8);
162 size = mode_cmd->pitches[0] * height;
163 aligned_size = ALIGN(size, PAGE_SIZE);
164 ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain, flags,
165 ttm_bo_type_kernel, NULL, &gobj);
166 if (ret) {
167 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
168 return -ENOMEM;
169 }
170 abo = gem_to_amdgpu_bo(gobj);
171
172 if (fb_tiled)
173 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
174
175 ret = amdgpu_bo_reserve(abo, false);
176 if (unlikely(ret != 0))
177 goto out_unref;
178
179 if (tiling_flags) {
180 ret = amdgpu_bo_set_tiling_flags(abo,
181 tiling_flags);
182 if (ret)
183 dev_err(adev->dev, "FB failed to set tiling flags\n");
184 }
185
186 ret = amdgpu_bo_pin(abo, domain);
187 if (ret) {
188 amdgpu_bo_unreserve(abo);
189 goto out_unref;
190 }
191
192 ret = amdgpu_ttm_alloc_gart(&abo->tbo);
193 if (ret) {
194 amdgpu_bo_unreserve(abo);
195 dev_err(adev->dev, "%p bind failed\n", abo);
196 goto out_unref;
197 }
198
199 ret = amdgpu_bo_kmap(abo, NULL);
200 amdgpu_bo_unreserve(abo);
201 if (ret) {
202 goto out_unref;
203 }
204
205 *gobj_p = gobj;
206 return 0;
207 out_unref:
208 amdgpufb_destroy_pinned_object(gobj);
209 *gobj_p = NULL;
210 return ret;
211 }
212
amdgpufb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)213 static int amdgpufb_create(struct drm_fb_helper *helper,
214 struct drm_fb_helper_surface_size *sizes)
215 {
216 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
217 struct amdgpu_device *adev = rfbdev->adev;
218 struct fb_info *info;
219 struct drm_framebuffer *fb = NULL;
220 struct drm_mode_fb_cmd2 mode_cmd;
221 struct drm_gem_object *gobj = NULL;
222 struct amdgpu_bo *abo = NULL;
223 int ret;
224 unsigned long tmp;
225
226 mode_cmd.width = sizes->surface_width;
227 mode_cmd.height = sizes->surface_height;
228
229 if (sizes->surface_bpp == 24)
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 = amdgpufb_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 abo = gem_to_amdgpu_bo(gobj);
242
243 #ifndef __NetBSD__
244 /* okay we have an object now allocate the framebuffer */
245 info = drm_fb_helper_alloc_fbi(helper);
246 if (IS_ERR(info)) {
247 ret = PTR_ERR(info);
248 goto out;
249 }
250 #endif
251
252 ret = amdgpu_display_framebuffer_init(adev->ddev, &rfbdev->rfb,
253 &mode_cmd, gobj);
254 if (ret) {
255 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
256 goto out;
257 }
258
259 fb = &rfbdev->rfb.base;
260
261 /* setup helper */
262 rfbdev->helper.fb = fb;
263
264 #ifdef __NetBSD__
265 {
266 static const struct amdgpufb_attach_args zero_afa;
267 struct amdgpufb_attach_args afa = zero_afa;
268
269 __USE(tmp);
270 __USE(info);
271
272 afa.afa_fb_helper = helper;
273 afa.afa_fb_sizes = *sizes;
274 afa.afa_fb_ptr = amdgpu_bo_kptr(abo);
275 afa.afa_fb_linebytes = mode_cmd.pitches[0];
276
277 KERNEL_LOCK(1, NULL);
278 helper->fbdev = config_found(adev->ddev->dev, &afa, NULL,
279 CFARGS(.iattr = "amdgpufbbus"));
280 KERNEL_UNLOCK_ONE(NULL);
281 if (helper->fbdev == NULL) {
282 DRM_ERROR("failed to attach amdgpufb\n");
283 goto out;
284 }
285 }
286 #else /* __NetBSD__ */
287 info->fbops = &amdgpufb_ops;
288
289 tmp = amdgpu_bo_gpu_offset(abo) - adev->gmc.vram_start;
290 info->fix.smem_start = adev->gmc.aper_base + tmp;
291 info->fix.smem_len = amdgpu_bo_size(abo);
292 info->screen_base = amdgpu_bo_kptr(abo);
293 info->screen_size = amdgpu_bo_size(abo);
294
295 drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
296
297 /* setup aperture base/size for vesafb takeover */
298 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
299 info->apertures->ranges[0].size = adev->gmc.aper_size;
300
301 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
302
303 if (info->screen_base == NULL) {
304 ret = -ENOSPC;
305 goto out;
306 }
307
308 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
309 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->gmc.aper_base);
310 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
311 DRM_INFO("fb depth is %d\n", fb->format->depth);
312 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
313
314 vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
315 #endif
316 return 0;
317
318 out:
319 if (abo) {
320
321 }
322 if (fb && ret) {
323 drm_gem_object_put_unlocked(gobj);
324 drm_framebuffer_unregister_private(fb);
325 drm_framebuffer_cleanup(fb);
326 kfree(fb);
327 }
328 return ret;
329 }
330
amdgpu_fbdev_destroy(struct drm_device * dev,struct amdgpu_fbdev * rfbdev)331 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
332 {
333 struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
334
335 drm_fb_helper_unregister_fbi(&rfbdev->helper);
336
337 if (rfb->base.obj[0]) {
338 amdgpufb_destroy_pinned_object(rfb->base.obj[0]);
339 rfb->base.obj[0] = NULL;
340 drm_framebuffer_unregister_private(&rfb->base);
341 drm_framebuffer_cleanup(&rfb->base);
342 }
343 drm_fb_helper_fini(&rfbdev->helper);
344
345 return 0;
346 }
347
348 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
349 .fb_probe = amdgpufb_create,
350 };
351
amdgpu_fbdev_init(struct amdgpu_device * adev)352 int amdgpu_fbdev_init(struct amdgpu_device *adev)
353 {
354 struct amdgpu_fbdev *rfbdev;
355 int bpp_sel = 32;
356 int ret;
357
358 /* don't init fbdev on hw without DCE */
359 if (!adev->mode_info.mode_config_initialized)
360 return 0;
361
362 /* don't init fbdev if there are no connectors */
363 if (list_empty(&adev->ddev->mode_config.connector_list))
364 return 0;
365
366 /* select 8 bpp console on low vram cards */
367 if (adev->gmc.real_vram_size <= (32*1024*1024))
368 bpp_sel = 8;
369
370 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
371 if (!rfbdev)
372 return -ENOMEM;
373
374 rfbdev->adev = adev;
375 adev->mode_info.rfbdev = rfbdev;
376
377 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
378 &amdgpu_fb_helper_funcs);
379
380 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
381 AMDGPUFB_CONN_LIMIT);
382 if (ret) {
383 kfree(rfbdev);
384 return ret;
385 }
386
387 drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
388
389 /* disable all the possible outputs/crtcs before entering KMS mode */
390 if (!amdgpu_device_has_dc_support(adev))
391 drm_helper_disable_unused_functions(adev->ddev);
392
393 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
394 return 0;
395 }
396
amdgpu_fbdev_fini(struct amdgpu_device * adev)397 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
398 {
399 if (!adev->mode_info.rfbdev)
400 return;
401
402 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
403 kfree(adev->mode_info.rfbdev);
404 adev->mode_info.rfbdev = NULL;
405 }
406
amdgpu_fbdev_set_suspend(struct amdgpu_device * adev,int state)407 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
408 {
409 if (adev->mode_info.rfbdev)
410 drm_fb_helper_set_suspend_unlocked(&adev->mode_info.rfbdev->helper,
411 state);
412 }
413
amdgpu_fbdev_total_size(struct amdgpu_device * adev)414 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
415 {
416 struct amdgpu_bo *robj;
417 int size = 0;
418
419 if (!adev->mode_info.rfbdev)
420 return 0;
421
422 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]);
423 size += amdgpu_bo_size(robj);
424 return size;
425 }
426
amdgpu_fbdev_robj_is_fb(struct amdgpu_device * adev,struct amdgpu_bo * robj)427 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
428 {
429 if (!adev->mode_info.rfbdev)
430 return false;
431 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]))
432 return true;
433 return false;
434 }
435