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