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11#include <linux/module.h>
12#include <drm/drmP.h>
13#include <drm/drm_fb_helper.h>
14#include <drm/drm_crtc_helper.h>
15
16#include <linux/fb.h>
17
18#include "cirrus_drv.h"
19
20static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
21 int x, int y, int width, int height)
22{
23 int i;
24 struct drm_gem_object *obj;
25 struct cirrus_bo *bo;
26 int src_offset, dst_offset;
27 int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8;
28 int ret = -EBUSY;
29 bool unmap = false;
30 bool store_for_later = false;
31 int x2, y2;
32 unsigned long flags;
33
34 obj = afbdev->gfb.obj;
35 bo = gem_to_cirrus_bo(obj);
36
37
38
39
40
41
42 if (!in_interrupt())
43 ret = cirrus_bo_reserve(bo, true);
44 if (ret) {
45 if (ret != -EBUSY)
46 return;
47 store_for_later = true;
48 }
49
50 x2 = x + width - 1;
51 y2 = y + height - 1;
52 spin_lock_irqsave(&afbdev->dirty_lock, flags);
53
54 if (afbdev->y1 < y)
55 y = afbdev->y1;
56 if (afbdev->y2 > y2)
57 y2 = afbdev->y2;
58 if (afbdev->x1 < x)
59 x = afbdev->x1;
60 if (afbdev->x2 > x2)
61 x2 = afbdev->x2;
62
63 if (store_for_later) {
64 afbdev->x1 = x;
65 afbdev->x2 = x2;
66 afbdev->y1 = y;
67 afbdev->y2 = y2;
68 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
69 return;
70 }
71
72 afbdev->x1 = afbdev->y1 = INT_MAX;
73 afbdev->x2 = afbdev->y2 = 0;
74 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
75
76 if (!bo->kmap.virtual) {
77 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
78 if (ret) {
79 DRM_ERROR("failed to kmap fb updates\n");
80 cirrus_bo_unreserve(bo);
81 return;
82 }
83 unmap = true;
84 }
85 for (i = y; i < y + height; i++) {
86
87 src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp);
88 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
89
90 }
91 if (unmap)
92 ttm_bo_kunmap(&bo->kmap);
93
94 cirrus_bo_unreserve(bo);
95}
96
97static void cirrus_fillrect(struct fb_info *info,
98 const struct fb_fillrect *rect)
99{
100 struct cirrus_fbdev *afbdev = info->par;
101 sys_fillrect(info, rect);
102 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
103 rect->height);
104}
105
106static void cirrus_copyarea(struct fb_info *info,
107 const struct fb_copyarea *area)
108{
109 struct cirrus_fbdev *afbdev = info->par;
110 sys_copyarea(info, area);
111 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width,
112 area->height);
113}
114
115static void cirrus_imageblit(struct fb_info *info,
116 const struct fb_image *image)
117{
118 struct cirrus_fbdev *afbdev = info->par;
119 sys_imageblit(info, image);
120 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width,
121 image->height);
122}
123
124
125static struct fb_ops cirrusfb_ops = {
126 .owner = THIS_MODULE,
127 .fb_check_var = drm_fb_helper_check_var,
128 .fb_set_par = drm_fb_helper_set_par,
129 .fb_fillrect = cirrus_fillrect,
130 .fb_copyarea = cirrus_copyarea,
131 .fb_imageblit = cirrus_imageblit,
132 .fb_pan_display = drm_fb_helper_pan_display,
133 .fb_blank = drm_fb_helper_blank,
134 .fb_setcmap = drm_fb_helper_setcmap,
135};
136
137static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
138 struct drm_mode_fb_cmd2 *mode_cmd,
139 struct drm_gem_object **gobj_p)
140{
141 struct drm_device *dev = afbdev->helper.dev;
142 u32 bpp, depth;
143 u32 size;
144 struct drm_gem_object *gobj;
145
146 int ret = 0;
147 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
148
149 if (bpp > 24)
150 return -EINVAL;
151 size = mode_cmd->pitches[0] * mode_cmd->height;
152 ret = cirrus_gem_create(dev, size, true, &gobj);
153 if (ret)
154 return ret;
155
156 *gobj_p = gobj;
157 return ret;
158}
159
160static int cirrusfb_create(struct drm_fb_helper *helper,
161 struct drm_fb_helper_surface_size *sizes)
162{
163 struct cirrus_fbdev *gfbdev = (struct cirrus_fbdev *)helper;
164 struct drm_device *dev = gfbdev->helper.dev;
165 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
166 struct fb_info *info;
167 struct drm_framebuffer *fb;
168 struct drm_mode_fb_cmd2 mode_cmd;
169 struct device *device = &dev->pdev->dev;
170 void *sysram;
171 struct drm_gem_object *gobj = NULL;
172 struct cirrus_bo *bo = 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 bo = gem_to_cirrus_bo(gobj);
189
190 sysram = vmalloc(size);
191 if (!sysram)
192 return -ENOMEM;
193
194 info = framebuffer_alloc(0, device);
195 if (info == NULL)
196 return -ENOMEM;
197
198 info->par = gfbdev;
199
200 ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj);
201 if (ret)
202 return ret;
203
204 gfbdev->sysram = sysram;
205 gfbdev->size = size;
206
207 fb = &gfbdev->gfb.base;
208 if (!fb) {
209 DRM_INFO("fb is NULL\n");
210 return -EINVAL;
211 }
212
213
214 gfbdev->helper.fb = fb;
215 gfbdev->helper.fbdev = info;
216
217 strcpy(info->fix.id, "cirrusdrmfb");
218
219
220 info->flags = FBINFO_DEFAULT;
221 info->fbops = &cirrusfb_ops;
222
223 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
224 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width,
225 sizes->fb_height);
226
227
228 info->apertures = alloc_apertures(1);
229 if (!info->apertures) {
230 ret = -ENOMEM;
231 goto out_iounmap;
232 }
233 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base;
234 info->apertures->ranges[0].size = cdev->mc.vram_size;
235
236 info->screen_base = sysram;
237 info->screen_size = size;
238
239 info->fix.mmio_start = 0;
240 info->fix.mmio_len = 0;
241
242 ret = fb_alloc_cmap(&info->cmap, 256, 0);
243 if (ret) {
244 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
245 ret = -ENOMEM;
246 goto out_iounmap;
247 }
248
249 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
250 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start);
251 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len);
252 DRM_INFO("fb depth is %d\n", fb->depth);
253 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
254
255 return 0;
256out_iounmap:
257 return ret;
258}
259
260static int cirrus_fbdev_destroy(struct drm_device *dev,
261 struct cirrus_fbdev *gfbdev)
262{
263 struct fb_info *info;
264 struct cirrus_framebuffer *gfb = &gfbdev->gfb;
265
266 if (gfbdev->helper.fbdev) {
267 info = gfbdev->helper.fbdev;
268
269 unregister_framebuffer(info);
270 if (info->cmap.len)
271 fb_dealloc_cmap(&info->cmap);
272 framebuffer_release(info);
273 }
274
275 if (gfb->obj) {
276 drm_gem_object_unreference_unlocked(gfb->obj);
277 gfb->obj = NULL;
278 }
279
280 vfree(gfbdev->sysram);
281 drm_fb_helper_fini(&gfbdev->helper);
282 drm_framebuffer_unregister_private(&gfb->base);
283 drm_framebuffer_cleanup(&gfb->base);
284
285 return 0;
286}
287
288static struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
289 .gamma_set = cirrus_crtc_fb_gamma_set,
290 .gamma_get = cirrus_crtc_fb_gamma_get,
291 .fb_probe = cirrusfb_create,
292};
293
294int cirrus_fbdev_init(struct cirrus_device *cdev)
295{
296 struct cirrus_fbdev *gfbdev;
297 int ret;
298 int bpp_sel = 24;
299
300
301 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL);
302 if (!gfbdev)
303 return -ENOMEM;
304
305 cdev->mode_info.gfbdev = gfbdev;
306 gfbdev->helper.funcs = &cirrus_fb_helper_funcs;
307 spin_lock_init(&gfbdev->dirty_lock);
308
309 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper,
310 cdev->num_crtc, CIRRUSFB_CONN_LIMIT);
311 if (ret) {
312 kfree(gfbdev);
313 return ret;
314 }
315 drm_fb_helper_single_add_all_connectors(&gfbdev->helper);
316
317
318 drm_helper_disable_unused_functions(cdev->dev);
319 drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel);
320
321 return 0;
322}
323
324void cirrus_fbdev_fini(struct cirrus_device *cdev)
325{
326 if (!cdev->mode_info.gfbdev)
327 return;
328
329 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev);
330 kfree(cdev->mode_info.gfbdev);
331 cdev->mode_info.gfbdev = NULL;
332}
333
