1/*	$NetBSD: radeon_fb.c,v 1.15 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: radeon_fb.c,v 1.15 2021/12/20 20:34:58 chs Exp $");
31
32#include <linux/module.h>
33#include <linux/pci.h>
34#include <linux/pm_runtime.h>
35#include <linux/slab.h>
36#include <linux/vga_switcheroo.h>
37
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#include <drm/radeon_drm.h>
43
44#include "radeon.h"
45
46#ifdef __NetBSD__
47#include "radeondrmkmsfb.h"
48
49#include <linux/nbsd-namespace.h>
50#endif
51
52/* object hierarchy -
53 * this contains a helper + a radeon fb
54 * the helper contains a pointer to radeon framebuffer baseclass.
55 */
56struct radeon_fbdev {
57	struct drm_fb_helper helper; /* must be first */
58	struct drm_framebuffer fb;
59	struct radeon_device *rdev;
60};
61
62#ifndef __NetBSD__
63static int
64radeonfb_open(struct fb_info *info, int user)
65{
66	struct radeon_fbdev *rfbdev = info->par;
67	struct radeon_device *rdev = rfbdev->rdev;
68	int ret = pm_runtime_get_sync(rdev->ddev->dev);
69	if (ret < 0 && ret != -EACCES) {
70		pm_runtime_mark_last_busy(rdev->ddev->dev);
71		pm_runtime_put_autosuspend(rdev->ddev->dev);
72		return ret;
73	}
74	return 0;
75}
76
77static int
78radeonfb_release(struct fb_info *info, int user)
79{
80	struct radeon_fbdev *rfbdev = info->par;
81	struct radeon_device *rdev = rfbdev->rdev;
82
83	pm_runtime_mark_last_busy(rdev->ddev->dev);
84	pm_runtime_put_autosuspend(rdev->ddev->dev);
85	return 0;
86}
87
88static const struct fb_ops radeonfb_ops = {
89	.owner = THIS_MODULE,
90	DRM_FB_HELPER_DEFAULT_OPS,
91	.fb_open = radeonfb_open,
92	.fb_release = radeonfb_release,
93	.fb_fillrect = drm_fb_helper_cfb_fillrect,
94	.fb_copyarea = drm_fb_helper_cfb_copyarea,
95	.fb_imageblit = drm_fb_helper_cfb_imageblit,
96};
97#endif
98
99
100int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
101{
102	int aligned = width;
103	int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
104	int pitch_mask = 0;
105
106	switch (cpp) {
107	case 1:
108		pitch_mask = align_large ? 255 : 127;
109		break;
110	case 2:
111		pitch_mask = align_large ? 127 : 31;
112		break;
113	case 3:
114	case 4:
115		pitch_mask = align_large ? 63 : 15;
116		break;
117	}
118
119	aligned += pitch_mask;
120	aligned &= ~pitch_mask;
121	return aligned * cpp;
122}
123
124static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
125{
126	struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
127	int ret;
128
129	ret = radeon_bo_reserve(rbo, false);
130	if (likely(ret == 0)) {
131		radeon_bo_kunmap(rbo);
132		radeon_bo_unpin(rbo);
133		radeon_bo_unreserve(rbo);
134	}
135	drm_gem_object_put_unlocked(gobj);
136}
137
138static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
139					 struct drm_mode_fb_cmd2 *mode_cmd,
140					 struct drm_gem_object **gobj_p)
141{
142	const struct drm_format_info *info;
143	struct radeon_device *rdev = rfbdev->rdev;
144	struct drm_gem_object *gobj = NULL;
145	struct radeon_bo *rbo = NULL;
146	bool fb_tiled = false; /* useful for testing */
147	u32 tiling_flags = 0;
148	int ret;
149	int aligned_size, size;
150	int height = mode_cmd->height;
151	u32 cpp;
152
153	info = drm_get_format_info(rdev->ddev, mode_cmd);
154	cpp = info->cpp[0];
155
156	/* need to align pitch with crtc limits */
157	mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
158						  fb_tiled);
159
160	if (rdev->family >= CHIP_R600)
161		height = ALIGN(mode_cmd->height, 8);
162	size = mode_cmd->pitches[0] * height;
163	aligned_size = ALIGN(size, PAGE_SIZE);
164	ret = radeon_gem_object_create(rdev, aligned_size, 0,
165				       RADEON_GEM_DOMAIN_VRAM,
166				       0, true, &gobj);
167	if (ret) {
168		pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
169		return -ENOMEM;
170	}
171	rbo = gem_to_radeon_bo(gobj);
172
173	if (fb_tiled)
174		tiling_flags = RADEON_TILING_MACRO;
175
176#ifdef __BIG_ENDIAN
177	switch (cpp) {
178	case 4:
179		tiling_flags |= RADEON_TILING_SWAP_32BIT;
180		break;
181	case 2:
182		tiling_flags |= RADEON_TILING_SWAP_16BIT;
183	default:
184		break;
185	}
186#endif
187
188	if (tiling_flags) {
189		ret = radeon_bo_set_tiling_flags(rbo,
190						 tiling_flags | RADEON_TILING_SURFACE,
191						 mode_cmd->pitches[0]);
192		if (ret)
193			dev_err(rdev->dev, "FB failed to set tiling flags\n");
194	}
195
196
197	ret = radeon_bo_reserve(rbo, false);
198	if (unlikely(ret != 0))
199		goto out_unref;
200	/* Only 27 bit offset for legacy CRTC */
201	ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
202				       ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
203				       NULL);
204	if (ret) {
205		radeon_bo_unreserve(rbo);
206		goto out_unref;
207	}
208	if (fb_tiled)
209		radeon_bo_check_tiling(rbo, 0, 0);
210	ret = radeon_bo_kmap(rbo, NULL);
211	radeon_bo_unreserve(rbo);
212	if (ret) {
213		goto out_unref;
214	}
215
216	*gobj_p = gobj;
217	return 0;
218out_unref:
219	radeonfb_destroy_pinned_object(gobj);
220	*gobj_p = NULL;
221	return ret;
222}
223
224static int radeonfb_create(struct drm_fb_helper *helper,
225			   struct drm_fb_helper_surface_size *sizes)
226{
227	struct radeon_fbdev *rfbdev =
228		container_of(helper, struct radeon_fbdev, helper);
229	struct radeon_device *rdev = rfbdev->rdev;
230#ifndef __NetBSD__
231	struct fb_info *info;
232#endif
233	struct drm_framebuffer *fb = NULL;
234	struct drm_mode_fb_cmd2 mode_cmd;
235	struct drm_gem_object *gobj = NULL;
236	struct radeon_bo *rbo = NULL;
237	int ret;
238#ifndef __NetBSD__
239	unsigned long tmp;
240#endif
241
242	mode_cmd.width = sizes->surface_width;
243	mode_cmd.height = sizes->surface_height;
244
245	/* avivo can't scanout real 24bpp */
246	if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
247		sizes->surface_bpp = 32;
248
249	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
250							  sizes->surface_depth);
251
252	ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
253	if (ret) {
254		DRM_ERROR("failed to create fbcon object %d\n", ret);
255		return ret;
256	}
257
258	rbo = gem_to_radeon_bo(gobj);
259
260#ifdef __NetBSD__
261	ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
262	if (ret) {
263		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
264		goto out;
265	}
266
267	(void)memset(rbo->kptr, 0, radeon_bo_size(rbo));
268
269    {
270	static const struct radeonfb_attach_args zero_rfa;
271	struct radeonfb_attach_args rfa = zero_rfa;
272
273	rfa.rfa_fb_helper = helper;
274	rfa.rfa_fb_sizes = *sizes;
275	rfa.rfa_fb_ptr = rbo->kptr;
276	rfa.rfa_fb_linebytes = mode_cmd.pitches[0];
277
278	KERNEL_LOCK(1, NULL);
279	helper->fbdev = config_found(rdev->ddev->dev, &rfa, NULL,
280	    CFARGS(.iattr = "radeonfbbus"));
281	KERNEL_UNLOCK_ONE(NULL);
282	if (helper->fbdev == NULL) {
283		DRM_ERROR("failed to attach genfb\n");
284		goto out;
285	}
286    }
287	fb = &rfbdev->fb;
288	rfbdev->helper.fb = fb;
289#else
290	/* okay we have an object now allocate the framebuffer */
291	info = drm_fb_helper_alloc_fbi(helper);
292	if (IS_ERR(info)) {
293		ret = PTR_ERR(info);
294		goto out;
295	}
296
297	/* radeon resume is fragile and needs a vt switch to help it along */
298	info->skip_vt_switch = false;
299
300	ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
301	if (ret) {
302		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
303		goto out;
304	}
305
306	fb = &rfbdev->fb;
307
308	/* setup helper */
309	rfbdev->helper.fb = fb;
310
311	memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
312
313	info->fbops = &radeonfb_ops;
314
315	tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
316	info->fix.smem_start = rdev->mc.aper_base + tmp;
317	info->fix.smem_len = radeon_bo_size(rbo);
318	info->screen_base = rbo->kptr;
319	info->screen_size = radeon_bo_size(rbo);
320
321	drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
322
323	/* setup aperture base/size for vesafb takeover */
324	info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
325	info->apertures->ranges[0].size = rdev->mc.aper_size;
326
327	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
328
329	if (info->screen_base == NULL) {
330		ret = -ENOSPC;
331		goto out;
332	}
333
334	DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
335	DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
336	DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
337	DRM_INFO("fb depth is %d\n", fb->format->depth);
338	DRM_INFO("   pitch is %d\n", fb->pitches[0]);
339
340	vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
341#endif
342	return 0;
343
344out:
345	if (rbo) {
346
347	}
348	if (fb && ret) {
349		drm_gem_object_put_unlocked(gobj);
350		drm_framebuffer_unregister_private(fb);
351		drm_framebuffer_cleanup(fb);
352		kfree(fb);
353	}
354	return ret;
355}
356
357static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
358{
359	struct drm_framebuffer *fb = &rfbdev->fb;
360
361	drm_fb_helper_unregister_fbi(&rfbdev->helper);
362
363	if (fb->obj[0]) {
364		radeonfb_destroy_pinned_object(fb->obj[0]);
365		fb->obj[0] = NULL;
366		drm_framebuffer_unregister_private(fb);
367		drm_framebuffer_cleanup(fb);
368	}
369	drm_fb_helper_fini(&rfbdev->helper);
370
371	return 0;
372}
373
374static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
375	.fb_probe = radeonfb_create,
376};
377
378int radeon_fbdev_init(struct radeon_device *rdev)
379{
380	struct radeon_fbdev *rfbdev;
381	int bpp_sel = 32;
382	int ret;
383
384	/* don't enable fbdev if no connectors */
385	if (list_empty(&rdev->ddev->mode_config.connector_list))
386		return 0;
387
388	/* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
389	if (rdev->mc.real_vram_size <= (8*1024*1024))
390		bpp_sel = 8;
391	else if (ASIC_IS_RN50(rdev) ||
392		 rdev->mc.real_vram_size <= (32*1024*1024))
393		bpp_sel = 16;
394
395	rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
396	if (!rfbdev)
397		return -ENOMEM;
398
399	rfbdev->rdev = rdev;
400	rdev->mode_info.rfbdev = rfbdev;
401
402	drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
403			      &radeon_fb_helper_funcs);
404
405	ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
406				 RADEONFB_CONN_LIMIT);
407	if (ret)
408		goto free;
409
410	ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
411	if (ret)
412		goto fini;
413
414	/* disable all the possible outputs/crtcs before entering KMS mode */
415	drm_helper_disable_unused_functions(rdev->ddev);
416
417	ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
418	if (ret)
419		goto fini;
420
421	return 0;
422
423fini:
424	drm_fb_helper_fini(&rfbdev->helper);
425free:
426	kfree(rfbdev);
427	return ret;
428}
429
430void radeon_fbdev_fini(struct radeon_device *rdev)
431{
432	if (!rdev->mode_info.rfbdev)
433		return;
434
435	radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
436	kfree(rdev->mode_info.rfbdev);
437	rdev->mode_info.rfbdev = NULL;
438}
439
440void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
441{
442#ifndef __NetBSD__		/* XXX radeon fb suspend */
443	if (rdev->mode_info.rfbdev)
444		drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
445#endif
446}
447
448bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
449{
450	if (!rdev->mode_info.rfbdev)
451		return false;
452
453	if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->fb.obj[0]))
454		return true;
455	return false;
456}
457
458void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
459{
460	if (rdev->mode_info.rfbdev)
461		drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
462}
463
464void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
465{
466	if (rdev->mode_info.rfbdev)
467		drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
468}
469