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