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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_vram_object *gbo;
52 int src_offset, dst_offset;
53 int bpp = afbdev->afb.base.format->cpp[0];
54 int ret;
55 u8 *dst;
56 bool unmap = false;
57 bool store_for_later = false;
58 int x2, y2;
59 unsigned long flags;
60
61 gbo = drm_gem_vram_of_gem(afbdev->afb.obj);
62
63 if (drm_can_sleep()) {
64
65
66
67
68 ret = drm_gem_vram_pin(gbo, 0);
69 if (ret) {
70 if (ret != -EBUSY)
71 return;
72 store_for_later = true;
73 }
74 } else {
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 dst = drm_gem_vram_kmap(gbo, false, NULL);
105 if (IS_ERR(dst)) {
106 DRM_ERROR("failed to kmap fb updates\n");
107 goto out;
108 } else if (!dst) {
109 dst = drm_gem_vram_kmap(gbo, true, NULL);
110 if (IS_ERR(dst)) {
111 DRM_ERROR("failed to kmap fb updates\n");
112 goto out;
113 }
114 unmap = true;
115 }
116
117 for (i = y; i <= y2; i++) {
118
119 src_offset = dst_offset =
120 i * afbdev->afb.base.pitches[0] + (x * bpp);
121 memcpy_toio(dst + dst_offset, afbdev->sysram + src_offset,
122 (x2 - x + 1) * bpp);
123 }
124
125 if (unmap)
126 drm_gem_vram_kunmap(gbo);
127
128out:
129 drm_gem_vram_unpin(gbo);
130}
131
132static void ast_fillrect(struct fb_info *info,
133 const struct fb_fillrect *rect)
134{
135 struct ast_fbdev *afbdev = info->par;
136 drm_fb_helper_sys_fillrect(info, rect);
137 ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
138 rect->height);
139}
140
141static void ast_copyarea(struct fb_info *info,
142 const struct fb_copyarea *area)
143{
144 struct ast_fbdev *afbdev = info->par;
145 drm_fb_helper_sys_copyarea(info, area);
146 ast_dirty_update(afbdev, area->dx, area->dy, area->width,
147 area->height);
148}
149
150static void ast_imageblit(struct fb_info *info,
151 const struct fb_image *image)
152{
153 struct ast_fbdev *afbdev = info->par;
154 drm_fb_helper_sys_imageblit(info, image);
155 ast_dirty_update(afbdev, image->dx, image->dy, image->width,
156 image->height);
157}
158
159static struct fb_ops astfb_ops = {
160 .owner = THIS_MODULE,
161 .fb_check_var = drm_fb_helper_check_var,
162 .fb_set_par = drm_fb_helper_set_par,
163 .fb_fillrect = ast_fillrect,
164 .fb_copyarea = ast_copyarea,
165 .fb_imageblit = ast_imageblit,
166 .fb_pan_display = drm_fb_helper_pan_display,
167 .fb_blank = drm_fb_helper_blank,
168 .fb_setcmap = drm_fb_helper_setcmap,
169};
170
171static int astfb_create_object(struct ast_fbdev *afbdev,
172 const struct drm_mode_fb_cmd2 *mode_cmd,
173 struct drm_gem_object **gobj_p)
174{
175 struct drm_device *dev = afbdev->helper.dev;
176 u32 size;
177 struct drm_gem_object *gobj;
178 int ret = 0;
179
180 size = mode_cmd->pitches[0] * mode_cmd->height;
181 ret = ast_gem_create(dev, size, true, &gobj);
182 if (ret)
183 return ret;
184
185 *gobj_p = gobj;
186 return ret;
187}
188
189static int astfb_create(struct drm_fb_helper *helper,
190 struct drm_fb_helper_surface_size *sizes)
191{
192 struct ast_fbdev *afbdev =
193 container_of(helper, struct ast_fbdev, helper);
194 struct drm_device *dev = afbdev->helper.dev;
195 struct drm_mode_fb_cmd2 mode_cmd;
196 struct drm_framebuffer *fb;
197 struct fb_info *info;
198 int size, ret;
199 void *sysram;
200 struct drm_gem_object *gobj = NULL;
201 mode_cmd.width = sizes->surface_width;
202 mode_cmd.height = sizes->surface_height;
203 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
204
205 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
206 sizes->surface_depth);
207
208 size = mode_cmd.pitches[0] * mode_cmd.height;
209
210 ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
211 if (ret) {
212 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
213 return ret;
214 }
215
216 sysram = vmalloc(size);
217 if (!sysram)
218 return -ENOMEM;
219
220 info = drm_fb_helper_alloc_fbi(helper);
221 if (IS_ERR(info)) {
222 ret = PTR_ERR(info);
223 goto out;
224 }
225 ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
226 if (ret)
227 goto out;
228
229 afbdev->sysram = sysram;
230 afbdev->size = size;
231
232 fb = &afbdev->afb.base;
233 afbdev->helper.fb = fb;
234
235 info->fbops = &astfb_ops;
236
237 info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
238 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
239
240 drm_fb_helper_fill_info(info, &afbdev->helper, sizes);
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
