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28#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/errno.h>
31#include <linux/string.h>
32#include <linux/mm.h>
33#include <linux/tty.h>
34#include <linux/sysrq.h>
35#include <linux/delay.h>
36#include <linux/init.h>
37
38
39#include <drm/drmP.h>
40#include <drm/drm_crtc.h>
41#include <drm/drm_fb_helper.h>
42#include <drm/drm_util.h>
43#include <drm/drm_crtc_helper.h>
44
45#include "ast_drv.h"
46
47static void ast_dirty_update(struct ast_fbdev *afbdev,
48 int x, int y, int width, int height)
49{
50 int i;
51 struct drm_gem_object *obj;
52 struct ast_bo *bo;
53 int src_offset, dst_offset;
54 int bpp = afbdev->afb.base.format->cpp[0];
55 int ret = -EBUSY;
56 bool unmap = false;
57 bool store_for_later = false;
58 int x2, y2;
59 unsigned long flags;
60
61 obj = afbdev->afb.obj;
62 bo = gem_to_ast_bo(obj);
63
64
65
66
67
68
69 if (drm_can_sleep())
70 ret = ast_bo_reserve(bo, true);
71 if (ret) {
72 if (ret != -EBUSY)
73 return;
74
75 store_for_later = true;
76 }
77
78 x2 = x + width - 1;
79 y2 = y + height - 1;
80 spin_lock_irqsave(&afbdev->dirty_lock, flags);
81
82 if (afbdev->y1 < y)
83 y = afbdev->y1;
84 if (afbdev->y2 > y2)
85 y2 = afbdev->y2;
86 if (afbdev->x1 < x)
87 x = afbdev->x1;
88 if (afbdev->x2 > x2)
89 x2 = afbdev->x2;
90
91 if (store_for_later) {
92 afbdev->x1 = x;
93 afbdev->x2 = x2;
94 afbdev->y1 = y;
95 afbdev->y2 = y2;
96 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
97 return;
98 }
99
100 afbdev->x1 = afbdev->y1 = INT_MAX;
101 afbdev->x2 = afbdev->y2 = 0;
102 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
103
104 if (!bo->kmap.virtual) {
105 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
106 if (ret) {
107 DRM_ERROR("failed to kmap fb updates\n");
108 ast_bo_unreserve(bo);
109 return;
110 }
111 unmap = true;
112 }
113 for (i = y; i <= y2; i++) {
114
115 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
116 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
117
118 }
119 if (unmap)
120 ttm_bo_kunmap(&bo->kmap);
121
122 ast_bo_unreserve(bo);
123}
124
125static void ast_fillrect(struct fb_info *info,
126 const struct fb_fillrect *rect)
127{
128 struct ast_fbdev *afbdev = info->par;
129 drm_fb_helper_sys_fillrect(info, rect);
130 ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
131 rect->height);
132}
133
134static void ast_copyarea(struct fb_info *info,
135 const struct fb_copyarea *area)
136{
137 struct ast_fbdev *afbdev = info->par;
138 drm_fb_helper_sys_copyarea(info, area);
139 ast_dirty_update(afbdev, area->dx, area->dy, area->width,
140 area->height);
141}
142
143static void ast_imageblit(struct fb_info *info,
144 const struct fb_image *image)
145{
146 struct ast_fbdev *afbdev = info->par;
147 drm_fb_helper_sys_imageblit(info, image);
148 ast_dirty_update(afbdev, image->dx, image->dy, image->width,
149 image->height);
150}
151
152static struct fb_ops astfb_ops = {
153 .owner = THIS_MODULE,
154 .fb_check_var = drm_fb_helper_check_var,
155 .fb_set_par = drm_fb_helper_set_par,
156 .fb_fillrect = ast_fillrect,
157 .fb_copyarea = ast_copyarea,
158 .fb_imageblit = ast_imageblit,
159 .fb_pan_display = drm_fb_helper_pan_display,
160 .fb_blank = drm_fb_helper_blank,
161 .fb_setcmap = drm_fb_helper_setcmap,
162 .fb_debug_enter = drm_fb_helper_debug_enter,
163 .fb_debug_leave = drm_fb_helper_debug_leave,
164};
165
166static int astfb_create_object(struct ast_fbdev *afbdev,
167 const struct drm_mode_fb_cmd2 *mode_cmd,
168 struct drm_gem_object **gobj_p)
169{
170 struct drm_device *dev = afbdev->helper.dev;
171 u32 size;
172 struct drm_gem_object *gobj;
173 int ret = 0;
174
175 size = mode_cmd->pitches[0] * mode_cmd->height;
176 ret = ast_gem_create(dev, size, true, &gobj);
177 if (ret)
178 return ret;
179
180 *gobj_p = gobj;
181 return ret;
182}
183
184static int astfb_create(struct drm_fb_helper *helper,
185 struct drm_fb_helper_surface_size *sizes)
186{
187 struct ast_fbdev *afbdev =
188 container_of(helper, struct ast_fbdev, helper);
189 struct drm_device *dev = afbdev->helper.dev;
190 struct drm_mode_fb_cmd2 mode_cmd;
191 struct drm_framebuffer *fb;
192 struct fb_info *info;
193 int size, ret;
194 void *sysram;
195 struct drm_gem_object *gobj = NULL;
196 mode_cmd.width = sizes->surface_width;
197 mode_cmd.height = sizes->surface_height;
198 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
199
200 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
201 sizes->surface_depth);
202
203 size = mode_cmd.pitches[0] * mode_cmd.height;
204
205 ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
206 if (ret) {
207 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
208 return ret;
209 }
210
211 sysram = vmalloc(size);
212 if (!sysram)
213 return -ENOMEM;
214
215 info = drm_fb_helper_alloc_fbi(helper);
216 if (IS_ERR(info)) {
217 ret = PTR_ERR(info);
218 goto out;
219 }
220 info->par = afbdev;
221
222 ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
223 if (ret)
224 goto out;
225
226 afbdev->sysram = sysram;
227 afbdev->size = size;
228
229 fb = &afbdev->afb.base;
230 afbdev->helper.fb = fb;
231
232 strcpy(info->fix.id, "astdrmfb");
233
234 info->fbops = &astfb_ops;
235
236 info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
237 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
238
239 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
240 drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
241
242 info->screen_base = sysram;
243 info->screen_size = size;
244
245 info->pixmap.flags = FB_PIXMAP_SYSTEM;
246
247 DRM_DEBUG_KMS("allocated %dx%d\n",
248 fb->width, fb->height);
249
250 return 0;
251
252out:
253 vfree(sysram);
254 return ret;
255}
256
257static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
258 .fb_probe = astfb_create,
259};
260
261static void ast_fbdev_destroy(struct drm_device *dev,
262 struct ast_fbdev *afbdev)
263{
264 struct ast_framebuffer *afb = &afbdev->afb;
265
266 drm_helper_force_disable_all(dev);
267 drm_fb_helper_unregister_fbi(&afbdev->helper);
268
269 if (afb->obj) {
270 drm_gem_object_put_unlocked(afb->obj);
271 afb->obj = NULL;
272 }
273 drm_fb_helper_fini(&afbdev->helper);
274
275 vfree(afbdev->sysram);
276 drm_framebuffer_unregister_private(&afb->base);
277 drm_framebuffer_cleanup(&afb->base);
278}
279
280int ast_fbdev_init(struct drm_device *dev)
281{
282 struct ast_private *ast = dev->dev_private;
283 struct ast_fbdev *afbdev;
284 int ret;
285
286 afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
287 if (!afbdev)
288 return -ENOMEM;
289
290 ast->fbdev = afbdev;
291 spin_lock_init(&afbdev->dirty_lock);
292
293 drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
294
295 ret = drm_fb_helper_init(dev, &afbdev->helper, 1);
296 if (ret)
297 goto free;
298
299 ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
300 if (ret)
301 goto fini;
302
303
304 drm_helper_disable_unused_functions(dev);
305
306 ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
307 if (ret)
308 goto fini;
309
310 return 0;
311
312fini:
313 drm_fb_helper_fini(&afbdev->helper);
314free:
315 kfree(afbdev);
316 return ret;
317}
318
319void ast_fbdev_fini(struct drm_device *dev)
320{
321 struct ast_private *ast = dev->dev_private;
322
323 if (!ast->fbdev)
324 return;
325
326 ast_fbdev_destroy(dev, ast->fbdev);
327 kfree(ast->fbdev);
328 ast->fbdev = NULL;
329}
330
331void ast_fbdev_set_suspend(struct drm_device *dev, int state)
332{
333 struct ast_private *ast = dev->dev_private;
334
335 if (!ast->fbdev)
336 return;
337
338 drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
339}
340
341void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
342{
343 ast->fbdev->helper.fbdev->fix.smem_start =
344 ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
345 ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
346}
347
