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13#include "qemu/osdep.h"
14#include <linux/vfio.h>
15#include <sys/ioctl.h>
16
17#include "hw/display/edid.h"
18#include "ui/console.h"
19#include "qapi/error.h"
20#include "pci.h"
21#include "trace.h"
22
23#ifndef DRM_PLANE_TYPE_PRIMARY
24# define DRM_PLANE_TYPE_PRIMARY 1
25# define DRM_PLANE_TYPE_CURSOR 2
26#endif
27
28#define pread_field(_fd, _reg, _ptr, _fld) \
29 (sizeof(_ptr->_fld) != \
30 pread(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
31 _reg->offset + offsetof(typeof(*_ptr), _fld)))
32
33#define pwrite_field(_fd, _reg, _ptr, _fld) \
34 (sizeof(_ptr->_fld) != \
35 pwrite(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
36 _reg->offset + offsetof(typeof(*_ptr), _fld)))
37
38
39static void vfio_display_edid_link_up(void *opaque)
40{
41 VFIOPCIDevice *vdev = opaque;
42 VFIODisplay *dpy = vdev->dpy;
43 int fd = vdev->vbasedev.fd;
44
45 dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_UP;
46 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
47 goto err;
48 }
49 trace_vfio_display_edid_link_up();
50 return;
51
52err:
53 trace_vfio_display_edid_write_error();
54}
55
56static void vfio_display_edid_update(VFIOPCIDevice *vdev, bool enabled,
57 int prefx, int prefy)
58{
59 VFIODisplay *dpy = vdev->dpy;
60 int fd = vdev->vbasedev.fd;
61 qemu_edid_info edid = {
62 .maxx = dpy->edid_regs->max_xres,
63 .maxy = dpy->edid_regs->max_yres,
64 .prefx = prefx ?: vdev->display_xres,
65 .prefy = prefy ?: vdev->display_yres,
66 };
67
68 timer_del(dpy->edid_link_timer);
69 dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_DOWN;
70 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
71 goto err;
72 }
73 trace_vfio_display_edid_link_down();
74
75 if (!enabled) {
76 return;
77 }
78
79 if (edid.maxx && edid.prefx > edid.maxx) {
80 edid.prefx = edid.maxx;
81 }
82 if (edid.maxy && edid.prefy > edid.maxy) {
83 edid.prefy = edid.maxy;
84 }
85 qemu_edid_generate(dpy->edid_blob,
86 dpy->edid_regs->edid_max_size,
87 &edid);
88 trace_vfio_display_edid_update(edid.prefx, edid.prefy);
89
90 dpy->edid_regs->edid_size = qemu_edid_size(dpy->edid_blob);
91 if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, edid_size)) {
92 goto err;
93 }
94 if (pwrite(fd, dpy->edid_blob, dpy->edid_regs->edid_size,
95 dpy->edid_info->offset + dpy->edid_regs->edid_offset)
96 != dpy->edid_regs->edid_size) {
97 goto err;
98 }
99
100 timer_mod(dpy->edid_link_timer,
101 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 100);
102 return;
103
104err:
105 trace_vfio_display_edid_write_error();
106 return;
107}
108
109static void vfio_display_edid_ui_info(void *opaque, uint32_t idx,
110 QemuUIInfo *info)
111{
112 VFIOPCIDevice *vdev = opaque;
113 VFIODisplay *dpy = vdev->dpy;
114
115 if (!dpy->edid_regs) {
116 return;
117 }
118
119 if (info->width && info->height) {
120 vfio_display_edid_update(vdev, true, info->width, info->height);
121 } else {
122 vfio_display_edid_update(vdev, false, 0, 0);
123 }
124}
125
126static void vfio_display_edid_init(VFIOPCIDevice *vdev)
127{
128 VFIODisplay *dpy = vdev->dpy;
129 int fd = vdev->vbasedev.fd;
130 int ret;
131
132 ret = vfio_get_dev_region_info(&vdev->vbasedev,
133 VFIO_REGION_TYPE_GFX,
134 VFIO_REGION_SUBTYPE_GFX_EDID,
135 &dpy->edid_info);
136 if (ret) {
137 return;
138 }
139
140 trace_vfio_display_edid_available();
141 dpy->edid_regs = g_new0(struct vfio_region_gfx_edid, 1);
142 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_offset)) {
143 goto err;
144 }
145 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_max_size)) {
146 goto err;
147 }
148 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_xres)) {
149 goto err;
150 }
151 if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_yres)) {
152 goto err;
153 }
154
155 dpy->edid_blob = g_malloc0(dpy->edid_regs->edid_max_size);
156
157
158 if (!vdev->display_xres) {
159 vdev->display_xres = dpy->edid_regs->max_xres;
160 }
161 if (!vdev->display_yres) {
162 vdev->display_yres = dpy->edid_regs->max_yres;
163 }
164
165 dpy->edid_link_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
166 vfio_display_edid_link_up, vdev);
167
168 vfio_display_edid_update(vdev, true, 0, 0);
169 return;
170
171err:
172 trace_vfio_display_edid_write_error();
173 g_free(dpy->edid_regs);
174 dpy->edid_regs = NULL;
175 return;
176}
177
178static void vfio_display_edid_exit(VFIODisplay *dpy)
179{
180 if (!dpy->edid_regs) {
181 return;
182 }
183
184 g_free(dpy->edid_regs);
185 g_free(dpy->edid_blob);
186 timer_free(dpy->edid_link_timer);
187}
188
189static void vfio_display_update_cursor(VFIODMABuf *dmabuf,
190 struct vfio_device_gfx_plane_info *plane)
191{
192 if (dmabuf->pos_x != plane->x_pos || dmabuf->pos_y != plane->y_pos) {
193 dmabuf->pos_x = plane->x_pos;
194 dmabuf->pos_y = plane->y_pos;
195 dmabuf->pos_updates++;
196 }
197 if (dmabuf->hot_x != plane->x_hot || dmabuf->hot_y != plane->y_hot) {
198 dmabuf->hot_x = plane->x_hot;
199 dmabuf->hot_y = plane->y_hot;
200 dmabuf->hot_updates++;
201 }
202}
203
204static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
205 uint32_t plane_type)
206{
207 VFIODisplay *dpy = vdev->dpy;
208 struct vfio_device_gfx_plane_info plane;
209 VFIODMABuf *dmabuf;
210 int fd, ret;
211
212 memset(&plane, 0, sizeof(plane));
213 plane.argsz = sizeof(plane);
214 plane.flags = VFIO_GFX_PLANE_TYPE_DMABUF;
215 plane.drm_plane_type = plane_type;
216 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
217 if (ret < 0) {
218 return NULL;
219 }
220 if (!plane.drm_format || !plane.size) {
221 return NULL;
222 }
223
224 QTAILQ_FOREACH(dmabuf, &dpy->dmabuf.bufs, next) {
225 if (dmabuf->dmabuf_id == plane.dmabuf_id) {
226
227 QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
228 QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
229 if (plane_type == DRM_PLANE_TYPE_CURSOR) {
230 vfio_display_update_cursor(dmabuf, &plane);
231 }
232 return dmabuf;
233 }
234 }
235
236 fd = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_GFX_DMABUF, &plane.dmabuf_id);
237 if (fd < 0) {
238 return NULL;
239 }
240
241 dmabuf = g_new0(VFIODMABuf, 1);
242 dmabuf->dmabuf_id = plane.dmabuf_id;
243 dmabuf->buf.width = plane.width;
244 dmabuf->buf.height = plane.height;
245 dmabuf->buf.stride = plane.stride;
246 dmabuf->buf.fourcc = plane.drm_format;
247 dmabuf->buf.modifier = plane.drm_format_mod;
248 dmabuf->buf.fd = fd;
249 if (plane_type == DRM_PLANE_TYPE_CURSOR) {
250 vfio_display_update_cursor(dmabuf, &plane);
251 }
252
253 QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
254 return dmabuf;
255}
256
257static void vfio_display_free_one_dmabuf(VFIODisplay *dpy, VFIODMABuf *dmabuf)
258{
259 QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
260 dpy_gl_release_dmabuf(dpy->con, &dmabuf->buf);
261 close(dmabuf->buf.fd);
262 g_free(dmabuf);
263}
264
265static void vfio_display_free_dmabufs(VFIOPCIDevice *vdev)
266{
267 VFIODisplay *dpy = vdev->dpy;
268 VFIODMABuf *dmabuf, *tmp;
269 uint32_t keep = 5;
270
271 QTAILQ_FOREACH_SAFE(dmabuf, &dpy->dmabuf.bufs, next, tmp) {
272 if (keep > 0) {
273 keep--;
274 continue;
275 }
276 assert(dmabuf != dpy->dmabuf.primary);
277 vfio_display_free_one_dmabuf(dpy, dmabuf);
278 }
279}
280
281static void vfio_display_dmabuf_update(void *opaque)
282{
283 VFIOPCIDevice *vdev = opaque;
284 VFIODisplay *dpy = vdev->dpy;
285 VFIODMABuf *primary, *cursor;
286 bool free_bufs = false, new_cursor = false;
287
288 primary = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_PRIMARY);
289 if (primary == NULL) {
290 if (dpy->ramfb) {
291 ramfb_display_update(dpy->con, dpy->ramfb);
292 }
293 return;
294 }
295
296 if (dpy->dmabuf.primary != primary) {
297 dpy->dmabuf.primary = primary;
298 qemu_console_resize(dpy->con,
299 primary->buf.width, primary->buf.height);
300 dpy_gl_scanout_dmabuf(dpy->con, &primary->buf);
301 free_bufs = true;
302 }
303
304 cursor = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_CURSOR);
305 if (dpy->dmabuf.cursor != cursor) {
306 dpy->dmabuf.cursor = cursor;
307 new_cursor = true;
308 free_bufs = true;
309 }
310
311 if (cursor && (new_cursor || cursor->hot_updates)) {
312 bool have_hot = (cursor->hot_x != 0xffffffff &&
313 cursor->hot_y != 0xffffffff);
314 dpy_gl_cursor_dmabuf(dpy->con, &cursor->buf, have_hot,
315 cursor->hot_x, cursor->hot_y);
316 cursor->hot_updates = 0;
317 } else if (!cursor && new_cursor) {
318 dpy_gl_cursor_dmabuf(dpy->con, NULL, false, 0, 0);
319 }
320
321 if (cursor && cursor->pos_updates) {
322 dpy_gl_cursor_position(dpy->con,
323 cursor->pos_x,
324 cursor->pos_y);
325 cursor->pos_updates = 0;
326 }
327
328 dpy_gl_update(dpy->con, 0, 0, primary->buf.width, primary->buf.height);
329
330 if (free_bufs) {
331 vfio_display_free_dmabufs(vdev);
332 }
333}
334
335static int vfio_display_get_flags(void *opaque)
336{
337 return GRAPHIC_FLAGS_GL | GRAPHIC_FLAGS_DMABUF;
338}
339
340static const GraphicHwOps vfio_display_dmabuf_ops = {
341 .get_flags = vfio_display_get_flags,
342 .gfx_update = vfio_display_dmabuf_update,
343 .ui_info = vfio_display_edid_ui_info,
344};
345
346static int vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp)
347{
348 if (!display_opengl) {
349 error_setg(errp, "vfio-display-dmabuf: opengl not available");
350 return -1;
351 }
352
353 vdev->dpy = g_new0(VFIODisplay, 1);
354 vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
355 &vfio_display_dmabuf_ops,
356 vdev);
357 if (vdev->enable_ramfb) {
358 vdev->dpy->ramfb = ramfb_setup(errp);
359 }
360 vfio_display_edid_init(vdev);
361 return 0;
362}
363
364static void vfio_display_dmabuf_exit(VFIODisplay *dpy)
365{
366 VFIODMABuf *dmabuf;
367
368 if (QTAILQ_EMPTY(&dpy->dmabuf.bufs)) {
369 return;
370 }
371
372 while ((dmabuf = QTAILQ_FIRST(&dpy->dmabuf.bufs)) != NULL) {
373 vfio_display_free_one_dmabuf(dpy, dmabuf);
374 }
375}
376
377
378void vfio_display_reset(VFIOPCIDevice *vdev)
379{
380 if (!vdev || !vdev->dpy || !vdev->dpy->con ||
381 !vdev->dpy->dmabuf.primary) {
382 return;
383 }
384
385 dpy_gl_scanout_disable(vdev->dpy->con);
386 vfio_display_dmabuf_exit(vdev->dpy);
387 dpy_gfx_update_full(vdev->dpy->con);
388}
389
390static void vfio_display_region_update(void *opaque)
391{
392 VFIOPCIDevice *vdev = opaque;
393 VFIODisplay *dpy = vdev->dpy;
394 struct vfio_device_gfx_plane_info plane = {
395 .argsz = sizeof(plane),
396 .flags = VFIO_GFX_PLANE_TYPE_REGION
397 };
398 pixman_format_code_t format;
399 int ret;
400
401 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
402 if (ret < 0) {
403 error_report("ioctl VFIO_DEVICE_QUERY_GFX_PLANE: %s",
404 strerror(errno));
405 return;
406 }
407 if (!plane.drm_format || !plane.size) {
408 if (dpy->ramfb) {
409 ramfb_display_update(dpy->con, dpy->ramfb);
410 dpy->region.surface = NULL;
411 }
412 return;
413 }
414 format = qemu_drm_format_to_pixman(plane.drm_format);
415 if (!format) {
416 return;
417 }
418
419 if (dpy->region.buffer.size &&
420 dpy->region.buffer.nr != plane.region_index) {
421
422 vfio_region_exit(&dpy->region.buffer);
423 vfio_region_finalize(&dpy->region.buffer);
424 dpy->region.surface = NULL;
425 }
426
427 if (dpy->region.surface &&
428 (surface_width(dpy->region.surface) != plane.width ||
429 surface_height(dpy->region.surface) != plane.height ||
430 surface_format(dpy->region.surface) != format)) {
431
432 dpy->region.surface = NULL;
433 }
434
435 if (!dpy->region.buffer.size) {
436
437 ret = vfio_region_setup(OBJECT(vdev), &vdev->vbasedev,
438 &dpy->region.buffer,
439 plane.region_index,
440 "display");
441 if (ret != 0) {
442 error_report("%s: vfio_region_setup(%d): %s",
443 __func__, plane.region_index, strerror(-ret));
444 goto err;
445 }
446 ret = vfio_region_mmap(&dpy->region.buffer);
447 if (ret != 0) {
448 error_report("%s: vfio_region_mmap(%d): %s", __func__,
449 plane.region_index, strerror(-ret));
450 goto err;
451 }
452 assert(dpy->region.buffer.mmaps[0].mmap != NULL);
453 }
454
455 if (dpy->region.surface == NULL) {
456
457 dpy->region.surface = qemu_create_displaysurface_from
458 (plane.width, plane.height, format,
459 plane.stride, dpy->region.buffer.mmaps[0].mmap);
460 dpy_gfx_replace_surface(dpy->con, dpy->region.surface);
461 }
462
463
464 dpy_gfx_update(dpy->con, 0, 0,
465 surface_width(dpy->region.surface),
466 surface_height(dpy->region.surface));
467 return;
468
469err:
470 vfio_region_exit(&dpy->region.buffer);
471 vfio_region_finalize(&dpy->region.buffer);
472}
473
474static const GraphicHwOps vfio_display_region_ops = {
475 .gfx_update = vfio_display_region_update,
476};
477
478static int vfio_display_region_init(VFIOPCIDevice *vdev, Error **errp)
479{
480 vdev->dpy = g_new0(VFIODisplay, 1);
481 vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
482 &vfio_display_region_ops,
483 vdev);
484 if (vdev->enable_ramfb) {
485 vdev->dpy->ramfb = ramfb_setup(errp);
486 }
487 return 0;
488}
489
490static void vfio_display_region_exit(VFIODisplay *dpy)
491{
492 if (!dpy->region.buffer.size) {
493 return;
494 }
495
496 vfio_region_exit(&dpy->region.buffer);
497 vfio_region_finalize(&dpy->region.buffer);
498}
499
500
501
502int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp)
503{
504 struct vfio_device_gfx_plane_info probe;
505 int ret;
506
507 memset(&probe, 0, sizeof(probe));
508 probe.argsz = sizeof(probe);
509 probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_DMABUF;
510 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
511 if (ret == 0) {
512 return vfio_display_dmabuf_init(vdev, errp);
513 }
514
515 memset(&probe, 0, sizeof(probe));
516 probe.argsz = sizeof(probe);
517 probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_REGION;
518 ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
519 if (ret == 0) {
520 return vfio_display_region_init(vdev, errp);
521 }
522
523 if (vdev->display == ON_OFF_AUTO_AUTO) {
524
525 return 0;
526 }
527
528 error_setg(errp, "vfio: device doesn't support any (known) display method");
529 return -1;
530}
531
532void vfio_display_finalize(VFIOPCIDevice *vdev)
533{
534 if (!vdev->dpy) {
535 return;
536 }
537
538 graphic_console_close(vdev->dpy->con);
539 vfio_display_dmabuf_exit(vdev->dpy);
540 vfio_display_region_exit(vdev->dpy);
541 vfio_display_edid_exit(vdev->dpy);
542 g_free(vdev->dpy);
543}
544
