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(bo: rbo, no_intr: false);
47 if (likely(ret == 0)) {
48 radeon_bo_kunmap(bo: rbo);
49 radeon_bo_unpin(bo: rbo);
50 radeon_bo_unreserve(bo: rbo);
51 }
52 drm_gem_object_put(obj: gobj);
53}
54
55static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
56 struct drm_mode_fb_cmd2 *mode_cmd,
57 struct drm_gem_object **gobj_p)
58{
59 const struct drm_format_info *info;
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 info = drm_get_format_info(dev: rdev_to_drm(rdev), mode_cmd);
71 cpp = info->cpp[0];
72
73 /* need to align pitch with crtc limits */
74 mode_cmd->pitches[0] = radeon_align_pitch(rdev, width: mode_cmd->width, cpp,
75 tiled: fb_tiled);
76
77 if (rdev->family >= CHIP_R600)
78 height = ALIGN(mode_cmd->height, 8);
79 size = mode_cmd->pitches[0] * height;
80 aligned_size = ALIGN(size, PAGE_SIZE);
81 ret = radeon_gem_object_create(rdev, size: aligned_size, alignment: 0,
82 RADEON_GEM_DOMAIN_VRAM,
83 flags: 0, kernel: true, obj: &gobj);
84 if (ret) {
85 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
86 return -ENOMEM;
87 }
88 rbo = gem_to_radeon_bo(gobj);
89
90 if (fb_tiled)
91 tiling_flags = RADEON_TILING_MACRO;
92
93#ifdef __BIG_ENDIAN
94 switch (cpp) {
95 case 4:
96 tiling_flags |= RADEON_TILING_SWAP_32BIT;
97 break;
98 case 2:
99 tiling_flags |= RADEON_TILING_SWAP_16BIT;
100 break;
101 default:
102 break;
103 }
104#endif
105
106 if (tiling_flags) {
107 ret = radeon_bo_set_tiling_flags(bo: rbo,
108 tiling_flags: tiling_flags | RADEON_TILING_SURFACE,
109 pitch: mode_cmd->pitches[0]);
110 if (ret)
111 dev_err(rdev->dev, "FB failed to set tiling flags\n");
112 }
113
114 ret = radeon_bo_reserve(bo: rbo, no_intr: false);
115 if (unlikely(ret != 0))
116 goto err_radeon_fbdev_destroy_pinned_object;
117 /* Only 27 bit offset for legacy CRTC */
118 ret = radeon_bo_pin_restricted(bo: rbo, RADEON_GEM_DOMAIN_VRAM,
119 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
120 NULL);
121 if (ret) {
122 radeon_bo_unreserve(bo: rbo);
123 goto err_radeon_fbdev_destroy_pinned_object;
124 }
125 if (fb_tiled)
126 radeon_bo_check_tiling(bo: rbo, has_moved: 0, force_drop: 0);
127 ret = radeon_bo_kmap(bo: rbo, NULL);
128 radeon_bo_unreserve(bo: rbo);
129 if (ret)
130 goto err_radeon_fbdev_destroy_pinned_object;
131
132 *gobj_p = gobj;
133 return 0;
134
135err_radeon_fbdev_destroy_pinned_object:
136 radeon_fbdev_destroy_pinned_object(gobj);
137 *gobj_p = NULL;
138 return ret;
139}
140
141/*
142 * Fbdev ops and struct fb_ops
143 */
144
145static int radeon_fbdev_fb_open(struct fb_info *info, int user)
146{
147 struct drm_fb_helper *fb_helper = info->par;
148 struct radeon_device *rdev = fb_helper->dev->dev_private;
149 int ret;
150
151 ret = pm_runtime_get_sync(dev: rdev_to_drm(rdev)->dev);
152 if (ret < 0 && ret != -EACCES)
153 goto err_pm_runtime_mark_last_busy;
154
155 return 0;
156
157err_pm_runtime_mark_last_busy:
158 pm_runtime_mark_last_busy(dev: rdev_to_drm(rdev)->dev);
159 pm_runtime_put_autosuspend(dev: rdev_to_drm(rdev)->dev);
160 return ret;
161}
162
163static int radeon_fbdev_fb_release(struct fb_info *info, int user)
164{
165 struct drm_fb_helper *fb_helper = info->par;
166 struct radeon_device *rdev = fb_helper->dev->dev_private;
167
168 pm_runtime_mark_last_busy(dev: rdev_to_drm(rdev)->dev);
169 pm_runtime_put_autosuspend(dev: rdev_to_drm(rdev)->dev);
170
171 return 0;
172}
173
174static void radeon_fbdev_fb_destroy(struct fb_info *info)
175{
176 struct drm_fb_helper *fb_helper = info->par;
177 struct drm_framebuffer *fb = fb_helper->fb;
178 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, plane: 0);
179
180 drm_fb_helper_fini(helper: fb_helper);
181
182 drm_framebuffer_unregister_private(fb);
183 drm_framebuffer_cleanup(fb);
184 kfree(objp: fb);
185 radeon_fbdev_destroy_pinned_object(gobj);
186
187 drm_client_release(client: &fb_helper->client);
188 drm_fb_helper_unprepare(fb_helper);
189 kfree(objp: fb_helper);
190}
191
192static const struct fb_ops radeon_fbdev_fb_ops = {
193 .owner = THIS_MODULE,
194 .fb_open = radeon_fbdev_fb_open,
195 .fb_release = radeon_fbdev_fb_release,
196 FB_DEFAULT_IOMEM_OPS,
197 DRM_FB_HELPER_DEFAULT_OPS,
198 .fb_destroy = radeon_fbdev_fb_destroy,
199};
200
201static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
202};
203
204int radeon_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
205 struct drm_fb_helper_surface_size *sizes)
206{
207 struct radeon_device *rdev = fb_helper->dev->dev_private;
208 struct drm_mode_fb_cmd2 mode_cmd = { };
209 struct fb_info *info;
210 struct drm_gem_object *gobj;
211 struct radeon_bo *rbo;
212 struct drm_framebuffer *fb;
213 int ret;
214 unsigned long tmp;
215
216 mode_cmd.width = sizes->surface_width;
217 mode_cmd.height = sizes->surface_height;
218
219 /* avivo can't scanout real 24bpp */
220 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
221 sizes->surface_bpp = 32;
222
223 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp: sizes->surface_bpp,
224 depth: sizes->surface_depth);
225
226 ret = radeon_fbdev_create_pinned_object(fb_helper, mode_cmd: &mode_cmd, gobj_p: &gobj);
227 if (ret) {
228 DRM_ERROR("failed to create fbcon object %d\n", ret);
229 return ret;
230 }
231 rbo = gem_to_radeon_bo(gobj);
232
233 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
234 if (!fb) {
235 ret = -ENOMEM;
236 goto err_radeon_fbdev_destroy_pinned_object;
237 }
238 ret = radeon_framebuffer_init(dev: rdev_to_drm(rdev), rfb: fb, mode_cmd: &mode_cmd, obj: gobj);
239 if (ret) {
240 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
241 goto err_kfree;
242 }
243
244 /* setup helper */
245 fb_helper->funcs = &radeon_fbdev_fb_helper_funcs;
246 fb_helper->fb = fb;
247
248 /* okay we have an object now allocate the framebuffer */
249 info = drm_fb_helper_alloc_info(fb_helper);
250 if (IS_ERR(ptr: info)) {
251 ret = PTR_ERR(ptr: info);
252 goto err_drm_framebuffer_unregister_private;
253 }
254
255 info->fbops = &radeon_fbdev_fb_ops;
256
257 /* radeon resume is fragile and needs a vt switch to help it along */
258 info->skip_vt_switch = false;
259
260 drm_fb_helper_fill_info(info, fb_helper, sizes);
261
262 tmp = radeon_bo_gpu_offset(bo: rbo) - rdev->mc.vram_start;
263 info->fix.smem_start = rdev->mc.aper_base + tmp;
264 info->fix.smem_len = radeon_bo_size(bo: rbo);
265 info->screen_base = (__force void __iomem *)rbo->kptr;
266 info->screen_size = radeon_bo_size(bo: rbo);
267
268 memset_io(info->screen_base, 0, info->screen_size);
269
270 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
271
272 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
273 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
274 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
275 DRM_INFO("fb depth is %d\n", fb->format->depth);
276 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
277
278 return 0;
279
280err_drm_framebuffer_unregister_private:
281 fb_helper->fb = NULL;
282 drm_framebuffer_unregister_private(fb);
283 drm_framebuffer_cleanup(fb);
284err_kfree:
285 kfree(objp: fb);
286err_radeon_fbdev_destroy_pinned_object:
287 radeon_fbdev_destroy_pinned_object(gobj);
288 return ret;
289}
290
291bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
292{
293 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;
294 struct drm_gem_object *gobj;
295
296 if (!fb_helper)
297 return false;
298
299 gobj = drm_gem_fb_get_obj(fb: fb_helper->fb, plane: 0);
300 if (!gobj)
301 return false;
302 if (gobj != &robj->tbo.base)
303 return false;
304
305 return true;
306}
307

source code of linux/drivers/gpu/drm/radeon/radeon_fbdev.c