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