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13#include "qemu/osdep.h"
14#include <linux/vfio.h>
15#include <sys/ioctl.h>
16
17#include "sysemu/sysemu.h"
18#include "hw/display/edid.h"
19#include "ui/console.h"
20#include "qapi/error.h"
21#include "pci.h"
22#include "trace.h"
23
24#ifndef DRM_PLANE_TYPE_PRIMARY
25# define DRM_PLANE_TYPE_PRIMARY 1
26# define DRM_PLANE_TYPE_CURSOR 2
27#endif
28
29#define pread_field(_fd, _reg, _ptr, _fld) \
30 (sizeof(_ptr->_fld) != \
31 pread(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
32 _reg->offset + offsetof(typeof(*_ptr), _fld)))
33
34#define pwrite_field(_fd, _reg, _ptr, _fld) \
35 (sizeof(_ptr->_fld) != \
36 pwrite(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
37 _reg->offset + offsetof(typeof(*_ptr), _fld)))
38
39
40static void vfio_display_edid_link_up(void *opaque)
41{
42 VFIOPCIDevice *vdev = opaque;
43 VFIODisplay *dpy = vdev->dpy;
44 int fd = vdev->vbasedev.fd;
45
46 dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_UP;
47 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
48 goto err;
49 }
50 trace_vfio_display_edid_link_up();
51 return;
52
53err:
54 trace_vfio_display_edid_write_error();
55}
56
57static void vfio_display_edid_update(VFIOPCIDevice *vdev, bool enabled,
58 int prefx, int prefy)
59{
60 VFIODisplay *dpy = vdev->dpy;
61 int fd = vdev->vbasedev.fd;
62 qemu_edid_info edid = {
63 .maxx = dpy->edid_regs->max_xres,
64 .maxy = dpy->edid_regs->max_yres,
65 .prefx = prefx ?: vdev->display_xres,
66 .prefy = prefy ?: vdev->display_yres,
67 };
68
69 timer_del(dpy->edid_link_timer);
70 dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_DOWN;
71 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
72 goto err;
73 }
74 trace_vfio_display_edid_link_down();
75
76 if (!enabled) {
77 return;
78 }
79
80 if (edid.maxx && edid.prefx > edid.maxx) {
81 edid.prefx = edid.maxx;
82 }
83 if (edid.maxy && edid.prefy > edid.maxy) {
84 edid.prefy = edid.maxy;
85 }
86 qemu_edid_generate(dpy->edid_blob,
87 dpy->edid_regs->edid_max_size,
88 &edid);
89 trace_vfio_display_edid_update(edid.prefx, edid.prefy);
90
91 dpy->edid_regs->edid_size = qemu_edid_size(dpy->edid_blob);
92 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, edid_size)) {
93 goto err;
94 }
95 if (pwrite(fd, dpy->edid_blob, dpy->edid_regs->edid_size,
96 dpy->edid_info->offset + dpy->edid_regs->edid_offset)
97 != dpy->edid_regs->edid_size) {
98 goto err;
99 }
100
101 timer_mod(dpy->edid_link_timer,
102 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 100);
103 return;
104
105err:
106 trace_vfio_display_edid_write_error();
107 return;
108}
109
110static int vfio_display_edid_ui_info(void *opaque, uint32_t idx,
111 QemuUIInfo *info)
112{
113 VFIOPCIDevice *vdev = opaque;
114 VFIODisplay *dpy = vdev->dpy;
115
116 if (!dpy->edid_regs) {
117 return 0;
118 }
119
120 if (info->width && info->height) {
121 vfio_display_edid_update(vdev, true, info->width, info->height);
122 } else {
123 vfio_display_edid_update(vdev, false, 0, 0);
124 }
125
126 return 0;
127}
128
129static void vfio_display_edid_init(VFIOPCIDevice *vdev)
130{
131 VFIODisplay *dpy = vdev->dpy;
132 int fd = vdev->vbasedev.fd;
133 int ret;
134
135 ret = vfio_get_dev_region_info(&vdev->vbasedev,
136 VFIO_REGION_TYPE_GFX,
137 VFIO_REGION_SUBTYPE_GFX_EDID,
138 &dpy->edid_info);
139 if (ret) {
140 return;
141 }
142
143 trace_vfio_display_edid_available();
144 dpy->edid_regs = g_new0(struct vfio_region_gfx_edid, 1);
145 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_offset)) {
146 goto err;
147 }
148 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_max_size)) {
149 goto err;
150 }
151 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_xres)) {
152 goto err;
153 }
154 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_yres)) {
155 goto err;
156 }
157
158 dpy->edid_blob = g_malloc0(dpy->edid_regs->edid_max_size);
159
160
161 if (!vdev->display_xres) {
162 vdev->display_xres = dpy->edid_regs->max_xres;
163 }
164 if (!vdev->display_yres) {
165 vdev->display_yres = dpy->edid_regs->max_yres;
166 }
167
168 dpy->edid_link_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
169 vfio_display_edid_link_up, vdev);
170
171 vfio_display_edid_update(vdev, true, 0, 0);
172 return;
173
174err:
175 trace_vfio_display_edid_write_error();
176 g_free(dpy->edid_regs);
177 dpy->edid_regs = NULL;
178 return;
179}
180
181static void vfio_display_edid_exit(VFIODisplay *dpy)
182{
183 if (!dpy->edid_regs) {
184 return;
185 }
186
187 g_free(dpy->edid_regs);
188 g_free(dpy->edid_blob);
189 timer_del(dpy->edid_link_timer);
190 timer_free(dpy->edid_link_timer);
191}
192
193static void vfio_display_update_cursor(VFIODMABuf *dmabuf,
194 struct vfio_device_gfx_plane_info *plane)
195{
196 if (dmabuf->pos_x != plane->x_pos || dmabuf->pos_y != plane->y_pos) {
197 dmabuf->pos_x = plane->x_pos;
198 dmabuf->pos_y = plane->y_pos;
199 dmabuf->pos_updates++;
200 }
201 if (dmabuf->hot_x != plane->x_hot || dmabuf->hot_y != plane->y_hot) {
202 dmabuf->hot_x = plane->x_hot;
203 dmabuf->hot_y = plane->y_hot;
204 dmabuf->hot_updates++;
205 }
206}
207
208static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
209 uint32_t plane_type)
210{
211 VFIODisplay *dpy = vdev->dpy;
212 struct vfio_device_gfx_plane_info plane;
213 VFIODMABuf *dmabuf;
214 int fd, ret;
215
216 memset(&plane, 0, sizeof(plane));
217 plane.argsz = sizeof(plane);
218 plane.flags = VFIO_GFX_PLANE_TYPE_DMABUF;
219 plane.drm_plane_type = plane_type;
220 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
221 if (ret < 0) {
222 return NULL;
223 }
224 if (!plane.drm_format || !plane.size) {
225 return NULL;
226 }
227
228 QTAILQ_FOREACH(dmabuf, &dpy->dmabuf.bufs, next) {
229 if (dmabuf->dmabuf_id == plane.dmabuf_id) {
230
231 QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
232 QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
233 if (plane_type == DRM_PLANE_TYPE_CURSOR) {
234 vfio_display_update_cursor(dmabuf, &plane);
235 }
236 return dmabuf;
237 }
238 }
239
240 fd = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_GFX_DMABUF, &plane.dmabuf_id);
241 if (fd < 0) {
242 return NULL;
243 }
244
245 dmabuf = g_new0(VFIODMABuf, 1);
246 dmabuf->dmabuf_id = plane.dmabuf_id;
247 dmabuf->buf.width = plane.width;
248 dmabuf->buf.height = plane.height;
249 dmabuf->buf.stride = plane.stride;
250 dmabuf->buf.fourcc = plane.drm_format;
251 dmabuf->buf.fd = fd;
252 if (plane_type == DRM_PLANE_TYPE_CURSOR) {
253 vfio_display_update_cursor(dmabuf, &plane);
254 }
255
256 QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
257 return dmabuf;
258}
259
260static void vfio_display_free_one_dmabuf(VFIODisplay *dpy, VFIODMABuf *dmabuf)
261{
262 QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
263 dpy_gl_release_dmabuf(dpy->con, &dmabuf->buf);
264 close(dmabuf->buf.fd);
265 g_free(dmabuf);
266}
267
268static void vfio_display_free_dmabufs(VFIOPCIDevice *vdev)
269{
270 VFIODisplay *dpy = vdev->dpy;
271 VFIODMABuf *dmabuf, *tmp;
272 uint32_t keep = 5;
273
274 QTAILQ_FOREACH_SAFE(dmabuf, &dpy->dmabuf.bufs, next, tmp) {
275 if (keep > 0) {
276 keep--;
277 continue;
278 }
279 assert(dmabuf != dpy->dmabuf.primary);
280 vfio_display_free_one_dmabuf(dpy, dmabuf);
281 }
282}
283
284static void vfio_display_dmabuf_update(void *opaque)
285{
286 VFIOPCIDevice *vdev = opaque;
287 VFIODisplay *dpy = vdev->dpy;
288 VFIODMABuf *primary, *cursor;
289 bool free_bufs = false, new_cursor = false;;
290
291 primary = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_PRIMARY);
292 if (primary == NULL) {
293 if (dpy->ramfb) {
294 ramfb_display_update(dpy->con, dpy->ramfb);
295 }
296 return;
297 }
298
299 if (dpy->dmabuf.primary != primary) {
300 dpy->dmabuf.primary = primary;
301 qemu_console_resize(dpy->con,
302 primary->buf.width, primary->buf.height);
303 dpy_gl_scanout_dmabuf(dpy->con, &primary->buf);
304 free_bufs = true;
305 }
306
307 cursor = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_CURSOR);
308 if (dpy->dmabuf.cursor != cursor) {
309 dpy->dmabuf.cursor = cursor;
310 new_cursor = true;
311 free_bufs = true;
312 }
313
314 if (cursor && (new_cursor || cursor->hot_updates)) {
315 bool have_hot = (cursor->hot_x != 0xffffffff &&
316 cursor->hot_y != 0xffffffff);
317 dpy_gl_cursor_dmabuf(dpy->con, &cursor->buf, have_hot,
318 cursor->hot_x, cursor->hot_y);
319 cursor->hot_updates = 0;
320 } else if (!cursor && new_cursor) {
321 dpy_gl_cursor_dmabuf(dpy->con, NULL, false, 0, 0);
322 }
323
324 if (cursor && cursor->pos_updates) {
325 dpy_gl_cursor_position(dpy->con,
326 cursor->pos_x,
327 cursor->pos_y);
328 cursor->pos_updates = 0;
329 }
330
331 dpy_gl_update(dpy->con, 0, 0, primary->buf.width, primary->buf.height);
332
333 if (free_bufs) {
334 vfio_display_free_dmabufs(vdev);
335 }
336}
337
338static const GraphicHwOps vfio_display_dmabuf_ops = {
339 .gfx_update = vfio_display_dmabuf_update,
340 .ui_info = vfio_display_edid_ui_info,
341};
342
343static int vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp)
344{
345 if (!display_opengl) {
346 error_setg(errp, "vfio-display-dmabuf: opengl not available");
347 return -1;
348 }
349
350 vdev->dpy = g_new0(VFIODisplay, 1);
351 vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
352 &vfio_display_dmabuf_ops,
353 vdev);
354 if (vdev->enable_ramfb) {
355 vdev->dpy->ramfb = ramfb_setup(errp);
356 }
357 vfio_display_edid_init(vdev);
358 return 0;
359}
360
361static void vfio_display_dmabuf_exit(VFIODisplay *dpy)
362{
363 VFIODMABuf *dmabuf;
364
365 if (QTAILQ_EMPTY(&dpy->dmabuf.bufs)) {
366 return;
367 }
368
369 while ((dmabuf = QTAILQ_FIRST(&dpy->dmabuf.bufs)) != NULL) {
370 vfio_display_free_one_dmabuf(dpy, dmabuf);
371 }
372}
373
374
375void vfio_display_reset(VFIOPCIDevice *vdev)
376{
377 if (!vdev || !vdev->dpy || !vdev->dpy->con ||
378 !vdev->dpy->dmabuf.primary) {
379 return;
380 }
381
382 dpy_gl_scanout_disable(vdev->dpy->con);
383 vfio_display_dmabuf_exit(vdev->dpy);
384 dpy_gfx_update_full(vdev->dpy->con);
385}
386
387static void vfio_display_region_update(void *opaque)
388{
389 VFIOPCIDevice *vdev = opaque;
390 VFIODisplay *dpy = vdev->dpy;
391 struct vfio_device_gfx_plane_info plane = {
392 .argsz = sizeof(plane),
393 .flags = VFIO_GFX_PLANE_TYPE_REGION
394 };
395 pixman_format_code_t format;
396 int ret;
397
398 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
399 if (ret < 0) {
400 error_report("ioctl VFIO_DEVICE_QUERY_GFX_PLANE: %s",
401 strerror(errno));
402 return;
403 }
404 if (!plane.drm_format || !plane.size) {
405 if (dpy->ramfb) {
406 ramfb_display_update(dpy->con, dpy->ramfb);
407 }
408 return;
409 }
410 format = qemu_drm_format_to_pixman(plane.drm_format);
411 if (!format) {
412 return;
413 }
414
415 if (dpy->region.buffer.size &&
416 dpy->region.buffer.nr != plane.region_index) {
417
418 vfio_region_exit(&dpy->region.buffer);
419 vfio_region_finalize(&dpy->region.buffer);
420 dpy->region.surface = NULL;
421 }
422
423 if (dpy->region.surface &&
424 (surface_width(dpy->region.surface) != plane.width ||
425 surface_height(dpy->region.surface) != plane.height ||
426 surface_format(dpy->region.surface) != format)) {
427
428 dpy->region.surface = NULL;
429 }
430
431 if (!dpy->region.buffer.size) {
432
433 ret = vfio_region_setup(OBJECT(vdev), &vdev->vbasedev,
434 &dpy->region.buffer,
435 plane.region_index,
436 "display");
437 if (ret != 0) {
438 error_report("%s: vfio_region_setup(%d): %s",
439 __func__, plane.region_index, strerror(-ret));
440 goto err;
441 }
442 ret = vfio_region_mmap(&dpy->region.buffer);
443 if (ret != 0) {
444 error_report("%s: vfio_region_mmap(%d): %s", __func__,
445 plane.region_index, strerror(-ret));
446 goto err;
447 }
448 assert(dpy->region.buffer.mmaps[0].mmap != NULL);
449 }
450
451 if (dpy->region.surface == NULL) {
452
453 dpy->region.surface = qemu_create_displaysurface_from
454 (plane.width, plane.height, format,
455 plane.stride, dpy->region.buffer.mmaps[0].mmap);
456 dpy_gfx_replace_surface(dpy->con, dpy->region.surface);
457 }
458
459
460 dpy_gfx_update(dpy->con, 0, 0,
461 surface_width(dpy->region.surface),
462 surface_height(dpy->region.surface));
463 return;
464
465err:
466 vfio_region_exit(&dpy->region.buffer);
467 vfio_region_finalize(&dpy->region.buffer);
468}
469
470static const GraphicHwOps vfio_display_region_ops = {
471 .gfx_update = vfio_display_region_update,
472};
473
474static int vfio_display_region_init(VFIOPCIDevice *vdev, Error **errp)
475{
476 vdev->dpy = g_new0(VFIODisplay, 1);
477 vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
478 &vfio_display_region_ops,
479 vdev);
480 if (vdev->enable_ramfb) {
481 vdev->dpy->ramfb = ramfb_setup(errp);
482 }
483 return 0;
484}
485
486static void vfio_display_region_exit(VFIODisplay *dpy)
487{
488 if (!dpy->region.buffer.size) {
489 return;
490 }
491
492 vfio_region_exit(&dpy->region.buffer);
493 vfio_region_finalize(&dpy->region.buffer);
494}
495
496
497
498int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp)
499{
500 struct vfio_device_gfx_plane_info probe;
501 int ret;
502
503 memset(&probe, 0, sizeof(probe));
504 probe.argsz = sizeof(probe);
505 probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_DMABUF;
506 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
507 if (ret == 0) {
508 return vfio_display_dmabuf_init(vdev, errp);
509 }
510
511 memset(&probe, 0, sizeof(probe));
512 probe.argsz = sizeof(probe);
513 probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_REGION;
514 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
515 if (ret == 0) {
516 return vfio_display_region_init(vdev, errp);
517 }
518
519 if (vdev->display == ON_OFF_AUTO_AUTO) {
520
521 return 0;
522 }
523
524 error_setg(errp, "vfio: device doesn't support any (known) display method");
525 return -1;
526}
527
528void vfio_display_finalize(VFIOPCIDevice *vdev)
529{
530 if (!vdev->dpy) {
531 return;
532 }
533
534 graphic_console_close(vdev->dpy->con);
535 vfio_display_dmabuf_exit(vdev->dpy);
536 vfio_display_region_exit(vdev->dpy);
537 vfio_display_edid_exit(vdev->dpy);
538 g_free(vdev->dpy);
539}
540
