1 /*
2 * Copyright © 2013 Red Hat
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 #include <linux/module.h>
27
28 #include "drmP.h"
29 #include "drm/drm.h"
30 #include "drm/drm_crtc.h"
31 #include "drm/drm_crtc_helper.h"
32 #include "qxl_drv.h"
33
34 #include "qxl_object.h"
35 #include "drm_fb_helper.h"
36
37 #define QXL_DIRTY_DELAY (HZ / 30)
38
39 struct qxl_fbdev {
40 struct drm_fb_helper helper;
41 struct qxl_framebuffer qfb;
42 struct qxl_device *qdev;
43
44 spinlock_t delayed_ops_lock;
45 struct list_head delayed_ops;
46 void *shadow;
47 int size;
48 };
49
qxl_fb_image_init(struct qxl_fb_image * qxl_fb_image,struct qxl_device * qdev,struct fb_info * info,const struct fb_image * image)50 static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
51 struct qxl_device *qdev, struct fb_info *info,
52 const struct fb_image *image)
53 {
54 qxl_fb_image->qdev = qdev;
55 if (info) {
56 qxl_fb_image->visual = info->fix.visual;
57 if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
58 qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
59 memcpy(&qxl_fb_image->pseudo_palette,
60 info->pseudo_palette,
61 sizeof(qxl_fb_image->pseudo_palette));
62 } else {
63 /* fallback */
64 if (image->depth == 1)
65 qxl_fb_image->visual = FB_VISUAL_MONO10;
66 else
67 qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
68 }
69 if (image) {
70 memcpy(&qxl_fb_image->fb_image, image,
71 sizeof(qxl_fb_image->fb_image));
72 }
73 }
74
75 #ifdef CONFIG_DRM_FBDEV_EMULATION
76 static struct fb_deferred_io qxl_defio = {
77 .delay = QXL_DIRTY_DELAY,
78 .deferred_io = drm_fb_helper_deferred_io,
79 };
80 #endif
81
82 static struct fb_ops qxlfb_ops = {
83 .owner = THIS_MODULE,
84 .fb_check_var = drm_fb_helper_check_var,
85 .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
86 .fb_fillrect = drm_fb_helper_sys_fillrect,
87 .fb_copyarea = drm_fb_helper_sys_copyarea,
88 .fb_imageblit = drm_fb_helper_sys_imageblit,
89 .fb_pan_display = drm_fb_helper_pan_display,
90 .fb_blank = drm_fb_helper_blank,
91 .fb_setcmap = drm_fb_helper_setcmap,
92 .fb_debug_enter = drm_fb_helper_debug_enter,
93 .fb_debug_leave = drm_fb_helper_debug_leave,
94 };
95
qxlfb_destroy_pinned_object(struct drm_gem_object * gobj)96 static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
97 {
98 struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
99 int ret;
100
101 ret = qxl_bo_reserve(qbo, false);
102 if (likely(ret == 0)) {
103 qxl_bo_kunmap(qbo);
104 qxl_bo_unpin(qbo);
105 qxl_bo_unreserve(qbo);
106 }
107 drm_gem_object_unreference_unlocked(gobj);
108 }
109
qxl_get_handle_for_primary_fb(struct qxl_device * qdev,struct drm_file * file_priv,uint32_t * handle)110 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
111 struct drm_file *file_priv,
112 uint32_t *handle)
113 {
114 int r;
115 struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
116
117 BUG_ON(!gobj);
118 /* drm_get_handle_create adds a reference - good */
119 r = drm_gem_handle_create(file_priv, gobj, handle);
120 if (r)
121 return r;
122 return 0;
123 }
124
qxlfb_create_pinned_object(struct qxl_fbdev * qfbdev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)125 static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
126 const struct drm_mode_fb_cmd2 *mode_cmd,
127 struct drm_gem_object **gobj_p)
128 {
129 struct qxl_device *qdev = qfbdev->qdev;
130 struct drm_gem_object *gobj = NULL;
131 struct qxl_bo *qbo = NULL;
132 int ret;
133 int aligned_size, size;
134 int height = mode_cmd->height;
135
136 size = mode_cmd->pitches[0] * height;
137 aligned_size = ALIGN(size, PAGE_SIZE);
138 /* TODO: unallocate and reallocate surface0 for real. Hack to just
139 * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
140 ret = qxl_gem_object_create(qdev, aligned_size, 0,
141 QXL_GEM_DOMAIN_SURFACE,
142 false, /* is discardable */
143 false, /* is kernel (false means device) */
144 NULL,
145 &gobj);
146 if (ret) {
147 pr_err("failed to allocate framebuffer (%d)\n",
148 aligned_size);
149 return -ENOMEM;
150 }
151 qbo = gem_to_qxl_bo(gobj);
152
153 qbo->surf.width = mode_cmd->width;
154 qbo->surf.height = mode_cmd->height;
155 qbo->surf.stride = mode_cmd->pitches[0];
156 qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
157 ret = qxl_bo_reserve(qbo, false);
158 if (unlikely(ret != 0))
159 goto out_unref;
160 ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
161 if (ret) {
162 qxl_bo_unreserve(qbo);
163 goto out_unref;
164 }
165 ret = qxl_bo_kmap(qbo, NULL);
166 qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
167 if (ret)
168 goto out_unref;
169
170 *gobj_p = gobj;
171 return 0;
172 out_unref:
173 qxlfb_destroy_pinned_object(gobj);
174 *gobj_p = NULL;
175 return ret;
176 }
177
178 /*
179 * FIXME
180 * It should not be necessary to have a special dirty() callback for fbdev.
181 */
qxlfb_framebuffer_dirty(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned flags,unsigned color,struct drm_clip_rect * clips,unsigned num_clips)182 static int qxlfb_framebuffer_dirty(struct drm_framebuffer *fb,
183 struct drm_file *file_priv,
184 unsigned flags, unsigned color,
185 struct drm_clip_rect *clips,
186 unsigned num_clips)
187 {
188 struct qxl_device *qdev = fb->dev->dev_private;
189 struct fb_info *info = qdev->fbdev_info;
190 struct qxl_fbdev *qfbdev = info->par;
191 struct qxl_fb_image qxl_fb_image;
192 struct fb_image *image = &qxl_fb_image.fb_image;
193
194 /* TODO: hard coding 32 bpp */
195 int stride = qfbdev->qfb.base.pitches[0];
196
197 /*
198 * we are using a shadow draw buffer, at qdev->surface0_shadow
199 */
200 qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", clips->x1, clips->x2,
201 clips->y1, clips->y2);
202 image->dx = clips->x1;
203 image->dy = clips->y1;
204 image->width = clips->x2 - clips->x1;
205 image->height = clips->y2 - clips->y1;
206 image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
207 warnings */
208 image->bg_color = 0;
209 image->depth = 32; /* TODO: take from somewhere? */
210 image->cmap.start = 0;
211 image->cmap.len = 0;
212 image->cmap.red = NULL;
213 image->cmap.green = NULL;
214 image->cmap.blue = NULL;
215 image->cmap.transp = NULL;
216 image->data = qfbdev->shadow + (clips->x1 * 4) + (stride * clips->y1);
217
218 qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
219 qxl_draw_opaque_fb(&qxl_fb_image, stride);
220
221 return 0;
222 }
223
224 static const struct drm_framebuffer_funcs qxlfb_fb_funcs = {
225 .destroy = qxl_user_framebuffer_destroy,
226 .dirty = qxlfb_framebuffer_dirty,
227 };
228
qxlfb_create(struct qxl_fbdev * qfbdev,struct drm_fb_helper_surface_size * sizes)229 static int qxlfb_create(struct qxl_fbdev *qfbdev,
230 struct drm_fb_helper_surface_size *sizes)
231 {
232 struct qxl_device *qdev = qfbdev->qdev;
233 struct fb_info *info;
234 struct drm_framebuffer *fb = NULL;
235 struct drm_mode_fb_cmd2 mode_cmd;
236 struct drm_gem_object *gobj = NULL;
237 struct qxl_bo *qbo = NULL;
238 int ret;
239 int size;
240 int bpp = sizes->surface_bpp;
241 int depth = sizes->surface_depth;
242 void *shadow;
243
244 mode_cmd.width = sizes->surface_width;
245 mode_cmd.height = sizes->surface_height;
246
247 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
248 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
249
250 ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
251 if (ret < 0)
252 return ret;
253
254 qbo = gem_to_qxl_bo(gobj);
255 QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
256 mode_cmd.height, mode_cmd.pitches[0]);
257
258 shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
259 /* TODO: what's the usual response to memory allocation errors? */
260 BUG_ON(!shadow);
261 QXL_INFO(qdev,
262 "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
263 qxl_bo_gpu_offset(qbo),
264 qxl_bo_mmap_offset(qbo),
265 qbo->kptr,
266 shadow);
267 size = mode_cmd.pitches[0] * mode_cmd.height;
268
269 info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
270 if (IS_ERR(info)) {
271 ret = PTR_ERR(info);
272 goto out_unref;
273 }
274
275 info->par = qfbdev;
276
277 qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj,
278 &qxlfb_fb_funcs);
279
280 fb = &qfbdev->qfb.base;
281
282 /* setup helper with fb data */
283 qfbdev->helper.fb = fb;
284
285 qfbdev->shadow = shadow;
286 strcpy(info->fix.id, "qxldrmfb");
287
288 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
289
290 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
291 info->fbops = &qxlfb_ops;
292
293 /*
294 * TODO: using gobj->size in various places in this function. Not sure
295 * what the difference between the different sizes is.
296 */
297 info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
298 info->fix.smem_len = gobj->size;
299 info->screen_base = qfbdev->shadow;
300 info->screen_size = gobj->size;
301
302 drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
303 sizes->fb_height);
304
305 /* setup aperture base/size for vesafb takeover */
306 info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
307 info->apertures->ranges[0].size = qdev->vram_size;
308
309 info->fix.mmio_start = 0;
310 info->fix.mmio_len = 0;
311
312 if (info->screen_base == NULL) {
313 ret = -ENOSPC;
314 goto out_destroy_fbi;
315 }
316
317 #ifdef CONFIG_DRM_FBDEV_EMULATION
318 info->fbdefio = &qxl_defio;
319 fb_deferred_io_init(info);
320 #endif
321
322 qdev->fbdev_info = info;
323 qdev->fbdev_qfb = &qfbdev->qfb;
324 DRM_INFO("fb mappable at 0x%lX, size %lu\n", info->fix.smem_start, (unsigned long)info->screen_size);
325 DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
326 return 0;
327
328 out_destroy_fbi:
329 drm_fb_helper_release_fbi(&qfbdev->helper);
330 out_unref:
331 if (qbo) {
332 ret = qxl_bo_reserve(qbo, false);
333 if (likely(ret == 0)) {
334 qxl_bo_kunmap(qbo);
335 qxl_bo_unpin(qbo);
336 qxl_bo_unreserve(qbo);
337 }
338 }
339 if (fb && ret) {
340 drm_gem_object_unreference_unlocked(gobj);
341 drm_framebuffer_cleanup(fb);
342 kfree(fb);
343 }
344 drm_gem_object_unreference_unlocked(gobj);
345 return ret;
346 }
347
qxl_fb_find_or_create_single(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)348 static int qxl_fb_find_or_create_single(
349 struct drm_fb_helper *helper,
350 struct drm_fb_helper_surface_size *sizes)
351 {
352 struct qxl_fbdev *qfbdev =
353 container_of(helper, struct qxl_fbdev, helper);
354 int new_fb = 0;
355 int ret;
356
357 if (!helper->fb) {
358 ret = qxlfb_create(qfbdev, sizes);
359 if (ret)
360 return ret;
361 new_fb = 1;
362 }
363 return new_fb;
364 }
365
qxl_fbdev_destroy(struct drm_device * dev,struct qxl_fbdev * qfbdev)366 static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
367 {
368 struct qxl_framebuffer *qfb = &qfbdev->qfb;
369
370 drm_fb_helper_unregister_fbi(&qfbdev->helper);
371 drm_fb_helper_release_fbi(&qfbdev->helper);
372
373 if (qfb->obj) {
374 qxlfb_destroy_pinned_object(qfb->obj);
375 qfb->obj = NULL;
376 }
377 drm_fb_helper_fini(&qfbdev->helper);
378 vfree(qfbdev->shadow);
379 drm_framebuffer_cleanup(&qfb->base);
380
381 return 0;
382 }
383
384 static const struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
385 .fb_probe = qxl_fb_find_or_create_single,
386 };
387
qxl_fbdev_init(struct qxl_device * qdev)388 int qxl_fbdev_init(struct qxl_device *qdev)
389 {
390 int ret = 0;
391
392 #ifdef CONFIG_DRM_FBDEV_EMULATION
393 struct qxl_fbdev *qfbdev;
394 int bpp_sel = 32; /* TODO: parameter from somewhere? */
395
396 qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
397 if (!qfbdev)
398 return -ENOMEM;
399
400 qfbdev->qdev = qdev;
401 qdev->mode_info.qfbdev = qfbdev;
402 spin_lock_init(&qfbdev->delayed_ops_lock);
403 INIT_LIST_HEAD(&qfbdev->delayed_ops);
404
405 drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
406 &qxl_fb_helper_funcs);
407
408 ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
409 qxl_num_crtc /* num_crtc - QXL supports just 1 */,
410 QXLFB_CONN_LIMIT);
411 if (ret)
412 goto free;
413
414 ret = drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
415 if (ret)
416 goto fini;
417
418 ret = drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
419 if (ret)
420 goto fini;
421
422 return 0;
423
424 fini:
425 drm_fb_helper_fini(&qfbdev->helper);
426 free:
427 kfree(qfbdev);
428 #endif
429
430 return ret;
431 }
432
qxl_fbdev_fini(struct qxl_device * qdev)433 void qxl_fbdev_fini(struct qxl_device *qdev)
434 {
435 if (!qdev->mode_info.qfbdev)
436 return;
437
438 qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
439 kfree(qdev->mode_info.qfbdev);
440 qdev->mode_info.qfbdev = NULL;
441 }
442
qxl_fbdev_set_suspend(struct qxl_device * qdev,int state)443 void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
444 {
445 if (!qdev->mode_info.qfbdev)
446 return;
447
448 drm_fb_helper_set_suspend(&qdev->mode_info.qfbdev->helper, state);
449 }
450
qxl_fbdev_qobj_is_fb(struct qxl_device * qdev,struct qxl_bo * qobj)451 bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
452 {
453 if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
454 return true;
455 return false;
456 }
457