Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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linux
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/fb.h>
28#include <linux/pci.h>
29#include <linux/pm_runtime.h>
30#include <linux/vga_switcheroo.h>
31
32#include <drm/drm_crtc_helper.h>
33#include <drm/drm_drv.h>
34#include <drm/drm_fb_helper.h>
35#include <drm/drm_fourcc.h>
36#include <drm/drm_framebuffer.h>
37#include <drm/drm_gem_framebuffer_helper.h>
38
39#include "radeon.h"
40
41static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
42{
43 struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
44 int ret;
45
46 ret = radeon_bo_reserve(rbo, false);
47 if (likely(ret == 0)) {
48 radeon_bo_kunmap(rbo);
49 radeon_bo_unpin(rbo);
50 radeon_bo_unreserve(rbo);
51 }
52 drm_gem_object_put(gobj);
53}
54
55static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
56 const struct drm_format_info *info,
57 struct drm_mode_fb_cmd2 *mode_cmd,
58 struct drm_gem_object **gobj_p)
59{
60 struct radeon_device *rdev = fb_helper->dev->dev_private;
61 struct drm_gem_object *gobj = NULL;
62 struct radeon_bo *rbo = NULL;
63 bool fb_tiled = false; /* useful for testing */
64 u32 tiling_flags = 0;
65 int ret;
66 int aligned_size, size;
67 int height = mode_cmd->height;
68 u32 cpp;
69
70 cpp = info->cpp[0];
71
72 /* need to align pitch with crtc limits */
73 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
74 fb_tiled);
75
76 if (rdev->family >= CHIP_R600)
77 height = ALIGN(mode_cmd->height, 8);
78 size = mode_cmd->pitches[0] * height;
79 aligned_size = ALIGN(size, PAGE_SIZE);
80 ret = radeon_gem_object_create(rdev, aligned_size, 0,
81 RADEON_GEM_DOMAIN_VRAM,
82 0, true, &gobj);
83 if (ret) {
84 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
85 return -ENOMEM;
86 }
87 rbo = gem_to_radeon_bo(gobj);
88
89 if (fb_tiled)
90 tiling_flags = RADEON_TILING_MACRO;
91
92#ifdef __BIG_ENDIAN
93 switch (cpp) {
94 case 4:
95 tiling_flags |= RADEON_TILING_SWAP_32BIT;
96 break;
97 case 2:
98 tiling_flags |= RADEON_TILING_SWAP_16BIT;
99 break;
100 default:
101 break;
102 }
103#endif
104
105 if (tiling_flags) {
106 ret = radeon_bo_set_tiling_flags(rbo,
107 tiling_flags | RADEON_TILING_SURFACE,
108 mode_cmd->pitches[0]);
109 if (ret)
110 dev_err(rdev->dev, "FB failed to set tiling flags\n");
111 }
112
113 ret = radeon_bo_reserve(rbo, false);
114 if (unlikely(ret != 0))
115 goto err_radeon_fbdev_destroy_pinned_object;
116 /* Only 27 bit offset for legacy CRTC */
117 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
118 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
119 NULL);
120 if (ret) {
121 radeon_bo_unreserve(rbo);
122 goto err_radeon_fbdev_destroy_pinned_object;
123 }
124 if (fb_tiled)
125 radeon_bo_check_tiling(rbo, 0, 0);
126 ret = radeon_bo_kmap(rbo, NULL);
127 radeon_bo_unreserve(rbo);
128 if (ret)
129 goto err_radeon_fbdev_destroy_pinned_object;
130
131 *gobj_p = gobj;
132 return 0;
133
134err_radeon_fbdev_destroy_pinned_object:
135 radeon_fbdev_destroy_pinned_object(gobj);
136 *gobj_p = NULL;
137 return ret;
138}
139
140/*
141 * Fbdev ops and struct fb_ops
142 */
143
144static int radeon_fbdev_fb_open(struct fb_info *info, int user)
145{
146 struct drm_fb_helper *fb_helper = info->par;
147 struct radeon_device *rdev = fb_helper->dev->dev_private;
148 int ret;
149
150 ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev);
151 if (ret < 0 && ret != -EACCES)
152 goto err_pm_runtime_mark_last_busy;
153
154 return 0;
155
156err_pm_runtime_mark_last_busy:
157 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
158 return ret;
159}
160
161static int radeon_fbdev_fb_release(struct fb_info *info, int user)
162{
163 struct drm_fb_helper *fb_helper = info->par;
164 struct radeon_device *rdev = fb_helper->dev->dev_private;
165
166 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
167
168 return 0;
169}
170
171static void radeon_fbdev_fb_destroy(struct fb_info *info)
172{
173 struct drm_fb_helper *fb_helper = info->par;
174 struct drm_framebuffer *fb = fb_helper->fb;
175 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
176
177 drm_fb_helper_fini(fb_helper);
178
179 drm_framebuffer_unregister_private(fb);
180 drm_framebuffer_cleanup(fb);
181 kfree(fb);
182 radeon_fbdev_destroy_pinned_object(gobj);
183
184 drm_client_release(&fb_helper->client);
185}
186
187static const struct fb_ops radeon_fbdev_fb_ops = {
188 .owner = THIS_MODULE,
189 .fb_open = radeon_fbdev_fb_open,
190 .fb_release = radeon_fbdev_fb_release,
191 FB_DEFAULT_IOMEM_OPS,
192 DRM_FB_HELPER_DEFAULT_OPS,
193 .fb_destroy = radeon_fbdev_fb_destroy,
194};
195
196static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
197};
198
199int radeon_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
200 struct drm_fb_helper_surface_size *sizes)
201{
202 struct radeon_device *rdev = fb_helper->dev->dev_private;
203 const struct drm_format_info *format_info;
204 struct drm_mode_fb_cmd2 mode_cmd = { };
205 struct fb_info *info = fb_helper->info;
206 struct drm_gem_object *gobj;
207 struct radeon_bo *rbo;
208 struct drm_framebuffer *fb;
209 int ret;
210 unsigned long tmp;
211
212 mode_cmd.width = sizes->surface_width;
213 mode_cmd.height = sizes->surface_height;
214
215 /* avivo can't scanout real 24bpp */
216 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
217 sizes->surface_bpp = 32;
218
219 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
220 sizes->surface_depth);
221
222 format_info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd.pixel_format,
223 mode_cmd.modifier[0]);
224 ret = radeon_fbdev_create_pinned_object(fb_helper, format_info, &mode_cmd, &gobj);
225 if (ret) {
226 DRM_ERROR("failed to create fbcon object %d\n", ret);
227 return ret;
228 }
229 rbo = gem_to_radeon_bo(gobj);
230
231 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
232 if (!fb) {
233 ret = -ENOMEM;
234 goto err_radeon_fbdev_destroy_pinned_object;
235 }
236 ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, format_info, &mode_cmd, gobj);
237 if (ret) {
238 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
239 goto err_kfree;
240 }
241
242 /* setup helper */
243 fb_helper->funcs = &radeon_fbdev_fb_helper_funcs;
244 fb_helper->fb = fb;
245
246 info->fbops = &radeon_fbdev_fb_ops;
247
248 /* radeon resume is fragile and needs a vt switch to help it along */
249 info->skip_vt_switch = false;
250
251 drm_fb_helper_fill_info(info, fb_helper, sizes);
252
253 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
254 info->fix.smem_start = rdev->mc.aper_base + tmp;
255 info->fix.smem_len = radeon_bo_size(rbo);
256 info->screen_base = (__force void __iomem *)rbo->kptr;
257 info->screen_size = radeon_bo_size(rbo);
258
259 memset_io(info->screen_base, 0, info->screen_size);
260
261 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
262
263 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
264 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
265 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
266 DRM_INFO("fb depth is %d\n", fb->format->depth);
267 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
268
269 return 0;
270
271err_kfree:
272 kfree(fb);
273err_radeon_fbdev_destroy_pinned_object:
274 radeon_fbdev_destroy_pinned_object(gobj);
275 return ret;
276}
277
278bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
279{
280 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;
281 struct drm_gem_object *gobj;
282
283 if (!fb_helper)
284 return false;
285
286 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
287 if (!gobj)
288 return false;
289 if (gobj != &robj->tbo.base)
290 return false;
291
292 return true;
293}