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11#include <linux/module.h>
12#include <drm/drmP.h>
13#include <drm/drm_util.h>
14#include <drm/drm_fb_helper.h>
15#include <drm/drm_crtc_helper.h>
16
17#include "cirrus_drv.h"
18
19static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
20 int x, int y, int width, int height)
21{
22 int i;
23 struct drm_gem_object *obj;
24 struct cirrus_bo *bo;
25 int src_offset, dst_offset;
26 int bpp = afbdev->gfb->format->cpp[0];
27 int ret = -EBUSY;
28 bool unmap = false;
29 bool store_for_later = false;
30 int x2, y2;
31 unsigned long flags;
32
33 obj = afbdev->gfb->obj[0];
34 bo = gem_to_cirrus_bo(obj);
35
36
37
38
39
40
41 if (drm_can_sleep())
42 ret = cirrus_bo_reserve(bo, true);
43 if (ret) {
44 if (ret != -EBUSY)
45 return;
46 store_for_later = true;
47 }
48
49 x2 = x + width - 1;
50 y2 = y + height - 1;
51 spin_lock_irqsave(&afbdev->dirty_lock, flags);
52
53 if (afbdev->y1 < y)
54 y = afbdev->y1;
55 if (afbdev->y2 > y2)
56 y2 = afbdev->y2;
57 if (afbdev->x1 < x)
58 x = afbdev->x1;
59 if (afbdev->x2 > x2)
60 x2 = afbdev->x2;
61
62 if (store_for_later) {
63 afbdev->x1 = x;
64 afbdev->x2 = x2;
65 afbdev->y1 = y;
66 afbdev->y2 = y2;
67 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
68 return;
69 }
70
71 afbdev->x1 = afbdev->y1 = INT_MAX;
72 afbdev->x2 = afbdev->y2 = 0;
73 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
74
75 if (!bo->kmap.virtual) {
76 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
77 if (ret) {
78 DRM_ERROR("failed to kmap fb updates\n");
79 cirrus_bo_unreserve(bo);
80 return;
81 }
82 unmap = true;
83 }
84 for (i = y; i < y + height; i++) {
85
86 src_offset = dst_offset = i * afbdev->gfb->pitches[0] + (x * bpp);
87 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
88
89 }
90 if (unmap)
91 ttm_bo_kunmap(&bo->kmap);
92
93 cirrus_bo_unreserve(bo);
94}
95
96static void cirrus_fillrect(struct fb_info *info,
97 const struct fb_fillrect *rect)
98{
99 struct cirrus_fbdev *afbdev = info->par;
100 drm_fb_helper_sys_fillrect(info, rect);
101 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
102 rect->height);
103}
104
105static void cirrus_copyarea(struct fb_info *info,
106 const struct fb_copyarea *area)
107{
108 struct cirrus_fbdev *afbdev = info->par;
109 drm_fb_helper_sys_copyarea(info, area);
110 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width,
111 area->height);
112}
113
114static void cirrus_imageblit(struct fb_info *info,
115 const struct fb_image *image)
116{
117 struct cirrus_fbdev *afbdev = info->par;
118 drm_fb_helper_sys_imageblit(info, image);
119 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width,
120 image->height);
121}
122
123
124static struct fb_ops cirrusfb_ops = {
125 .owner = THIS_MODULE,
126 .fb_check_var = drm_fb_helper_check_var,
127 .fb_set_par = drm_fb_helper_set_par,
128 .fb_fillrect = cirrus_fillrect,
129 .fb_copyarea = cirrus_copyarea,
130 .fb_imageblit = cirrus_imageblit,
131 .fb_pan_display = drm_fb_helper_pan_display,
132 .fb_blank = drm_fb_helper_blank,
133 .fb_setcmap = drm_fb_helper_setcmap,
134};
135
136static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
137 const struct drm_mode_fb_cmd2 *mode_cmd,
138 struct drm_gem_object **gobj_p)
139{
140 struct drm_device *dev = afbdev->helper.dev;
141 struct cirrus_device *cdev = dev->dev_private;
142 u32 bpp;
143 u32 size;
144 struct drm_gem_object *gobj;
145 int ret = 0;
146
147 bpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0) * 8;
148
149 if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height,
150 bpp, mode_cmd->pitches[0]))
151 return -EINVAL;
152
153 size = mode_cmd->pitches[0] * mode_cmd->height;
154 ret = cirrus_gem_create(dev, size, true, &gobj);
155 if (ret)
156 return ret;
157
158 *gobj_p = gobj;
159 return ret;
160}
161
162static int cirrusfb_create(struct drm_fb_helper *helper,
163 struct drm_fb_helper_surface_size *sizes)
164{
165 struct cirrus_fbdev *gfbdev =
166 container_of(helper, struct cirrus_fbdev, helper);
167 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
168 struct fb_info *info;
169 struct drm_framebuffer *fb;
170 struct drm_mode_fb_cmd2 mode_cmd;
171 void *sysram;
172 struct drm_gem_object *gobj = NULL;
173 int size, ret;
174
175 mode_cmd.width = sizes->surface_width;
176 mode_cmd.height = sizes->surface_height;
177 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
178 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
179 sizes->surface_depth);
180 size = mode_cmd.pitches[0] * mode_cmd.height;
181
182 ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj);
183 if (ret) {
184 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
185 return ret;
186 }
187
188 sysram = vmalloc(size);
189 if (!sysram)
190 return -ENOMEM;
191
192 info = drm_fb_helper_alloc_fbi(helper);
193 if (IS_ERR(info)) {
194 ret = PTR_ERR(info);
195 goto err_vfree;
196 }
197
198 info->par = gfbdev;
199
200 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
201 if (!fb) {
202 ret = -ENOMEM;
203 goto err_drm_gem_object_put_unlocked;
204 }
205
206 ret = cirrus_framebuffer_init(cdev->dev, fb, &mode_cmd, gobj);
207 if (ret)
208 goto err_kfree;
209
210 gfbdev->sysram = sysram;
211 gfbdev->size = size;
212 gfbdev->gfb = fb;
213
214
215 gfbdev->helper.fb = fb;
216
217 strcpy(info->fix.id, "cirrusdrmfb");
218
219 info->fbops = &cirrusfb_ops;
220
221 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
222 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width,
223 sizes->fb_height);
224
225
226 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base;
227 info->apertures->ranges[0].size = cdev->mc.vram_size;
228
229 info->fix.smem_start = cdev->dev->mode_config.fb_base;
230 info->fix.smem_len = cdev->mc.vram_size;
231
232 info->screen_base = sysram;
233 info->screen_size = size;
234
235 info->fix.mmio_start = 0;
236 info->fix.mmio_len = 0;
237
238 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
239 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start);
240 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len);
241 DRM_INFO("fb depth is %d\n", fb->format->depth);
242 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
243
244 return 0;
245
246err_kfree:
247 kfree(fb);
248err_drm_gem_object_put_unlocked:
249 drm_gem_object_put_unlocked(gobj);
250err_vfree:
251 vfree(sysram);
252 return ret;
253}
254
255static int cirrus_fbdev_destroy(struct drm_device *dev,
256 struct cirrus_fbdev *gfbdev)
257{
258 struct drm_framebuffer *gfb = gfbdev->gfb;
259
260 drm_helper_force_disable_all(dev);
261
262 drm_fb_helper_unregister_fbi(&gfbdev->helper);
263
264 vfree(gfbdev->sysram);
265 drm_fb_helper_fini(&gfbdev->helper);
266 if (gfb)
267 drm_framebuffer_put(gfb);
268
269 return 0;
270}
271
272static const struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
273 .fb_probe = cirrusfb_create,
274};
275
276int cirrus_fbdev_init(struct cirrus_device *cdev)
277{
278 struct cirrus_fbdev *gfbdev;
279 int ret;
280
281
282 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL);
283 if (!gfbdev)
284 return -ENOMEM;
285
286 cdev->mode_info.gfbdev = gfbdev;
287 spin_lock_init(&gfbdev->dirty_lock);
288
289 drm_fb_helper_prepare(cdev->dev, &gfbdev->helper,
290 &cirrus_fb_helper_funcs);
291
292 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper,
293 CIRRUSFB_CONN_LIMIT);
294 if (ret)
295 return ret;
296
297 ret = drm_fb_helper_single_add_all_connectors(&gfbdev->helper);
298 if (ret)
299 return ret;
300
301
302 drm_helper_disable_unused_functions(cdev->dev);
303
304 return drm_fb_helper_initial_config(&gfbdev->helper, cirrus_bpp);
305}
306
307void cirrus_fbdev_fini(struct cirrus_device *cdev)
308{
309 if (!cdev->mode_info.gfbdev)
310 return;
311
312 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev);
313 kfree(cdev->mode_info.gfbdev);
314 cdev->mode_info.gfbdev = NULL;
315}
316
