1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/lock.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/sx.h>
37 #include <sys/rman.h>
38 #include <machine/bus.h>
39
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
42
43 #include <arm/broadcom/bcm2835/bcm2835_firmware.h>
44 #include <arm/broadcom/bcm2835/bcm2835_mbox.h>
45 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
46 #include <arm/broadcom/bcm2835/bcm2835_vcbus.h>
47
48 #include "mbox_if.h"
49
50 #define REG_READ 0x00
51 #define REG_POL 0x10
52 #define REG_SENDER 0x14
53 #define REG_STATUS 0x18
54 #define STATUS_FULL 0x80000000
55 #define STATUS_EMPTY 0x40000000
56 #define REG_CONFIG 0x1C
57 #define CONFIG_DATA_IRQ 0x00000001
58 #define REG_WRITE 0x20 /* This is Mailbox 1 address */
59
60 #define MBOX_MSG(chan, data) (((data) & ~0xf) | ((chan) & 0xf))
61 #define MBOX_CHAN(msg) ((msg) & 0xf)
62 #define MBOX_DATA(msg) ((msg) & ~0xf)
63
64 #define MBOX_LOCK(sc) do { \
65 mtx_lock(&(sc)->lock); \
66 } while(0)
67
68 #define MBOX_UNLOCK(sc) do { \
69 mtx_unlock(&(sc)->lock); \
70 } while(0)
71
72 #ifdef DEBUG
73 #define dprintf(fmt, args...) printf(fmt, ##args)
74 #else
75 #define dprintf(fmt, args...)
76 #endif
77
78 struct bcm_mbox_softc {
79 struct mtx lock;
80 struct resource * mem_res;
81 struct resource * irq_res;
82 void* intr_hl;
83 bus_space_tag_t bst;
84 bus_space_handle_t bsh;
85 int msg[BCM2835_MBOX_CHANS];
86 int have_message[BCM2835_MBOX_CHANS];
87 struct sx property_chan_lock;
88 };
89
90 #define mbox_read_4(sc, reg) \
91 bus_space_read_4((sc)->bst, (sc)->bsh, reg)
92 #define mbox_write_4(sc, reg, val) \
93 bus_space_write_4((sc)->bst, (sc)->bsh, reg, val)
94
95 static struct ofw_compat_data compat_data[] = {
96 {"broadcom,bcm2835-mbox", 1},
97 {"brcm,bcm2835-mbox", 1},
98 {NULL, 0}
99 };
100
101 static int
bcm_mbox_read_msg(struct bcm_mbox_softc * sc,int * ochan)102 bcm_mbox_read_msg(struct bcm_mbox_softc *sc, int *ochan)
103 {
104 #ifdef DEBUG
105 uint32_t data;
106 #endif
107 uint32_t msg;
108 int chan;
109
110 msg = mbox_read_4(sc, REG_READ);
111 dprintf("bcm_mbox_intr: raw data %08x\n", msg);
112 chan = MBOX_CHAN(msg);
113 #ifdef DEBUG
114 data = MBOX_DATA(msg);
115 #endif
116 if (sc->msg[chan]) {
117 printf("bcm_mbox_intr: channel %d oveflow\n", chan);
118 return (1);
119 }
120 dprintf("bcm_mbox_intr: chan %d, data %08x\n", chan, data);
121 sc->msg[chan] = msg;
122
123 if (ochan != NULL)
124 *ochan = chan;
125
126 return (0);
127 }
128
129 static void
bcm_mbox_intr(void * arg)130 bcm_mbox_intr(void *arg)
131 {
132 struct bcm_mbox_softc *sc = arg;
133 int chan;
134
135 MBOX_LOCK(sc);
136 while (!(mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY))
137 if (bcm_mbox_read_msg(sc, &chan) == 0) {
138 sc->have_message[chan] = 1;
139 wakeup(&sc->have_message[chan]);
140 }
141 MBOX_UNLOCK(sc);
142 }
143
144 static int
bcm_mbox_probe(device_t dev)145 bcm_mbox_probe(device_t dev)
146 {
147
148 if (!ofw_bus_status_okay(dev))
149 return (ENXIO);
150
151 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
152 return (ENXIO);
153
154 device_set_desc(dev, "BCM2835 VideoCore Mailbox");
155
156 return (BUS_PROBE_DEFAULT);
157 }
158
159 static int
bcm_mbox_attach(device_t dev)160 bcm_mbox_attach(device_t dev)
161 {
162 struct bcm_mbox_softc *sc = device_get_softc(dev);
163 int i;
164 int rid = 0;
165
166 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
167 if (sc->mem_res == NULL) {
168 device_printf(dev, "could not allocate memory resource\n");
169 return (ENXIO);
170 }
171
172 sc->bst = rman_get_bustag(sc->mem_res);
173 sc->bsh = rman_get_bushandle(sc->mem_res);
174
175 rid = 0;
176 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
177 if (sc->irq_res == NULL) {
178 device_printf(dev, "could not allocate interrupt resource\n");
179 return (ENXIO);
180 }
181
182 /* Setup and enable the timer */
183 if (bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE | INTR_TYPE_MISC,
184 NULL, bcm_mbox_intr, sc, &sc->intr_hl) != 0) {
185 bus_release_resource(dev, SYS_RES_IRQ, rid, sc->irq_res);
186 device_printf(dev, "Unable to setup the clock irq handler.\n");
187 return (ENXIO);
188 }
189
190 mtx_init(&sc->lock, "vcio mbox", NULL, MTX_DEF);
191 for (i = 0; i < BCM2835_MBOX_CHANS; i++) {
192 sc->msg[i] = 0;
193 sc->have_message[i] = 0;
194 }
195
196 sx_init(&sc->property_chan_lock, "mboxprop");
197
198 /* Read all pending messages */
199 while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY) == 0)
200 (void)mbox_read_4(sc, REG_READ);
201
202 mbox_write_4(sc, REG_CONFIG, CONFIG_DATA_IRQ);
203
204 return (0);
205 }
206
207 /*
208 * Mailbox API
209 */
210 static int
bcm_mbox_write(device_t dev,int chan,uint32_t data)211 bcm_mbox_write(device_t dev, int chan, uint32_t data)
212 {
213 int limit = 1000;
214 struct bcm_mbox_softc *sc = device_get_softc(dev);
215
216 dprintf("bcm_mbox_write: chan %d, data %08x\n", chan, data);
217 MBOX_LOCK(sc);
218 sc->have_message[chan] = 0;
219 while ((mbox_read_4(sc, REG_STATUS) & STATUS_FULL) && --limit)
220 DELAY(5);
221 if (limit == 0) {
222 printf("bcm_mbox_write: STATUS_FULL stuck");
223 MBOX_UNLOCK(sc);
224 return (EAGAIN);
225 }
226 mbox_write_4(sc, REG_WRITE, MBOX_MSG(chan, data));
227 MBOX_UNLOCK(sc);
228
229 return (0);
230 }
231
232 static int
bcm_mbox_read(device_t dev,int chan,uint32_t * data)233 bcm_mbox_read(device_t dev, int chan, uint32_t *data)
234 {
235 struct bcm_mbox_softc *sc = device_get_softc(dev);
236 int err, read_chan;
237
238 dprintf("bcm_mbox_read: chan %d\n", chan);
239
240 err = 0;
241 MBOX_LOCK(sc);
242 if (!cold) {
243 if (sc->have_message[chan] == 0) {
244 if (mtx_sleep(&sc->have_message[chan], &sc->lock, 0,
245 "mbox", 10*hz) != 0) {
246 device_printf(dev, "timeout waiting for message on chan %d\n", chan);
247 err = ETIMEDOUT;
248 }
249 }
250 } else {
251 do {
252 /* Wait for a message */
253 while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY))
254 ;
255 /* Read the message */
256 if (bcm_mbox_read_msg(sc, &read_chan) != 0) {
257 err = EINVAL;
258 goto out;
259 }
260 } while (read_chan != chan);
261 }
262 /*
263 * get data from intr handler, the same channel is never coming
264 * because of holding sc lock.
265 */
266 *data = MBOX_DATA(sc->msg[chan]);
267 sc->msg[chan] = 0;
268 sc->have_message[chan] = 0;
269 out:
270 MBOX_UNLOCK(sc);
271 dprintf("bcm_mbox_read: chan %d, data %08x\n", chan, *data);
272
273 return (err);
274 }
275
276 static device_method_t bcm_mbox_methods[] = {
277 DEVMETHOD(device_probe, bcm_mbox_probe),
278 DEVMETHOD(device_attach, bcm_mbox_attach),
279
280 DEVMETHOD(mbox_read, bcm_mbox_read),
281 DEVMETHOD(mbox_write, bcm_mbox_write),
282
283 DEVMETHOD_END
284 };
285
286 static driver_t bcm_mbox_driver = {
287 "mbox",
288 bcm_mbox_methods,
289 sizeof(struct bcm_mbox_softc),
290 };
291
292 EARLY_DRIVER_MODULE(mbox, simplebus, bcm_mbox_driver, 0, 0,
293 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
294
295 static void
bcm2835_mbox_dma_cb(void * arg,bus_dma_segment_t * segs,int nseg,int err)296 bcm2835_mbox_dma_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
297 {
298 bus_addr_t *addr;
299
300 if (err)
301 return;
302 addr = (bus_addr_t *)arg;
303 *addr = ARMC_TO_VCBUS(segs[0].ds_addr);
304 }
305
306 static void *
bcm2835_mbox_init_dma(device_t dev,size_t len,bus_dma_tag_t * tag,bus_dmamap_t * map,bus_addr_t * phys)307 bcm2835_mbox_init_dma(device_t dev, size_t len, bus_dma_tag_t *tag,
308 bus_dmamap_t *map, bus_addr_t *phys)
309 {
310 void *buf;
311 int err;
312
313 err = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
314 bcm283x_dmabus_peripheral_lowaddr(), BUS_SPACE_MAXADDR, NULL, NULL,
315 len, 1, len, 0, NULL, NULL, tag);
316 if (err != 0) {
317 device_printf(dev, "can't create DMA tag\n");
318 return (NULL);
319 }
320
321 err = bus_dmamem_alloc(*tag, &buf, 0, map);
322 if (err != 0) {
323 bus_dma_tag_destroy(*tag);
324 device_printf(dev, "can't allocate dmamem\n");
325 return (NULL);
326 }
327
328 err = bus_dmamap_load(*tag, *map, buf, len, bcm2835_mbox_dma_cb,
329 phys, 0);
330 if (err != 0) {
331 bus_dmamem_free(*tag, buf, *map);
332 bus_dma_tag_destroy(*tag);
333 device_printf(dev, "can't load DMA map\n");
334 return (NULL);
335 }
336
337 return (buf);
338 }
339
340 static int
bcm2835_mbox_err(device_t dev,bus_addr_t msg_phys,uint32_t resp_phys,struct bcm2835_mbox_hdr * msg,size_t len)341 bcm2835_mbox_err(device_t dev, bus_addr_t msg_phys, uint32_t resp_phys,
342 struct bcm2835_mbox_hdr *msg, size_t len)
343 {
344 int idx;
345 struct bcm2835_mbox_tag_hdr *tag;
346 uint8_t *last;
347
348 if ((uint32_t)msg_phys != resp_phys) {
349 device_printf(dev, "response channel mismatch\n");
350 return (EIO);
351 }
352 if (msg->code != BCM2835_MBOX_CODE_RESP_SUCCESS) {
353 device_printf(dev, "mbox response error\n");
354 return (EIO);
355 }
356
357 /* Loop until the end tag. */
358 tag = (struct bcm2835_mbox_tag_hdr *)(msg + 1);
359 last = (uint8_t *)msg + len;
360 for (idx = 0; tag->tag != 0; idx++) {
361 /*
362 * When setting the GPIO config or state the firmware doesn't
363 * set tag->val_len correctly.
364 */
365 if ((tag->tag == BCM2835_FIRMWARE_TAG_SET_GPIO_CONFIG ||
366 tag->tag == BCM2835_FIRMWARE_TAG_SET_GPIO_STATE) &&
367 tag->val_len == 0) {
368 tag->val_len = BCM2835_MBOX_TAG_VAL_LEN_RESPONSE |
369 tag->val_buf_size;
370 }
371 if ((tag->val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE) == 0) {
372 device_printf(dev, "tag %d response error\n", idx);
373 return (EIO);
374 }
375 /* Clear the response bit. */
376 tag->val_len &= ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE;
377
378 /* Next tag. */
379 tag = (struct bcm2835_mbox_tag_hdr *)((uint8_t *)tag +
380 sizeof(*tag) + tag->val_buf_size);
381
382 if ((uint8_t *)tag > last) {
383 device_printf(dev, "mbox buffer size error\n");
384 return (EIO);
385 }
386 }
387
388 return (0);
389 }
390
391 int
bcm2835_mbox_property(void * msg,size_t msg_size)392 bcm2835_mbox_property(void *msg, size_t msg_size)
393 {
394 struct bcm_mbox_softc *sc;
395 bus_dma_tag_t msg_tag;
396 bus_dmamap_t msg_map;
397 bus_addr_t msg_phys;
398 char *buf;
399 uint32_t reg;
400 device_t mbox;
401 int err;
402
403 /* get mbox device */
404 mbox = devclass_get_device(devclass_find("mbox"), 0);
405 if (mbox == NULL)
406 return (ENXIO);
407
408 sc = device_get_softc(mbox);
409 sx_xlock(&sc->property_chan_lock);
410
411 /* Allocate memory for the message */
412 buf = bcm2835_mbox_init_dma(mbox, msg_size, &msg_tag, &msg_map,
413 &msg_phys);
414 if (buf == NULL) {
415 err = ENOMEM;
416 goto out;
417 }
418
419 memcpy(buf, msg, msg_size);
420
421 bus_dmamap_sync(msg_tag, msg_map,
422 BUS_DMASYNC_PREWRITE);
423
424 MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_PROP, (uint32_t)msg_phys);
425 MBOX_READ(mbox, BCM2835_MBOX_CHAN_PROP, ®);
426
427 bus_dmamap_sync(msg_tag, msg_map,
428 BUS_DMASYNC_PREREAD);
429
430 memcpy(msg, buf, msg_size);
431
432 err = bcm2835_mbox_err(mbox, msg_phys, reg,
433 (struct bcm2835_mbox_hdr *)msg, msg_size);
434
435 bus_dmamap_unload(msg_tag, msg_map);
436 bus_dmamem_free(msg_tag, buf, msg_map);
437 bus_dma_tag_destroy(msg_tag);
438 out:
439 sx_xunlock(&sc->property_chan_lock);
440 return (err);
441 }
442
443 int
bcm2835_mbox_set_power_state(uint32_t device_id,boolean_t on)444 bcm2835_mbox_set_power_state(uint32_t device_id, boolean_t on)
445 {
446 struct msg_set_power_state msg;
447 int err;
448
449 memset(&msg, 0, sizeof(msg));
450 msg.hdr.buf_size = sizeof(msg);
451 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
452 msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_POWER_STATE;
453 msg.tag_hdr.val_buf_size = sizeof(msg.body);
454 msg.tag_hdr.val_len = sizeof(msg.body.req);
455 msg.body.req.device_id = device_id;
456 msg.body.req.state = (on ? BCM2835_MBOX_POWER_ON : 0) |
457 BCM2835_MBOX_POWER_WAIT;
458 msg.end_tag = 0;
459
460 err = bcm2835_mbox_property(&msg, sizeof(msg));
461
462 return (err);
463 }
464
465 int
bcm2835_mbox_notify_xhci_reset(uint32_t pci_dev_addr)466 bcm2835_mbox_notify_xhci_reset(uint32_t pci_dev_addr)
467 {
468 struct msg_notify_xhci_reset msg;
469 int err;
470
471 memset(&msg, 0, sizeof(msg));
472 msg.hdr.buf_size = sizeof(msg);
473 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
474 msg.tag_hdr.tag = BCM2835_MBOX_TAG_NOTIFY_XHCI_RESET;
475 msg.tag_hdr.val_buf_size = sizeof(msg.body);
476 msg.tag_hdr.val_len = sizeof(msg.body.req);
477 msg.body.req.pci_device_addr = pci_dev_addr;
478 msg.end_tag = 0;
479
480 err = bcm2835_mbox_property(&msg, sizeof(msg));
481
482 return (err);
483 }
484
485 int
bcm2835_mbox_get_clock_rate(uint32_t clock_id,uint32_t * hz)486 bcm2835_mbox_get_clock_rate(uint32_t clock_id, uint32_t *hz)
487 {
488 struct msg_get_clock_rate msg;
489 int err;
490
491 memset(&msg, 0, sizeof(msg));
492 msg.hdr.buf_size = sizeof(msg);
493 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
494 msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_CLOCK_RATE;
495 msg.tag_hdr.val_buf_size = sizeof(msg.body);
496 msg.tag_hdr.val_len = sizeof(msg.body.req);
497 msg.body.req.clock_id = clock_id;
498 msg.end_tag = 0;
499
500 err = bcm2835_mbox_property(&msg, sizeof(msg));
501 *hz = msg.body.resp.rate_hz;
502
503 return (err);
504 }
505
506 int
bcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config * fb)507 bcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config *fb)
508 {
509 int err;
510 struct msg_fb_get_w_h msg;
511
512 memset(&msg, 0, sizeof(msg));
513 msg.hdr.buf_size = sizeof(msg);
514 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
515 BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, GET_PHYSICAL_W_H);
516 msg.physical_w_h.tag_hdr.val_len = 0;
517 msg.end_tag = 0;
518
519 err = bcm2835_mbox_property(&msg, sizeof(msg));
520 if (err == 0) {
521 fb->xres = msg.physical_w_h.body.resp.width;
522 fb->yres = msg.physical_w_h.body.resp.height;
523 }
524
525 return (err);
526 }
527
528 int
bcm2835_mbox_fb_get_bpp(struct bcm2835_fb_config * fb)529 bcm2835_mbox_fb_get_bpp(struct bcm2835_fb_config *fb)
530 {
531 int err;
532 struct msg_fb_get_bpp msg;
533
534 memset(&msg, 0, sizeof(msg));
535 msg.hdr.buf_size = sizeof(msg);
536 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
537 BCM2835_MBOX_INIT_TAG(&msg.bpp, GET_DEPTH);
538 msg.bpp.tag_hdr.val_len = 0;
539 msg.end_tag = 0;
540
541 err = bcm2835_mbox_property(&msg, sizeof(msg));
542 if (err == 0)
543 fb->bpp = msg.bpp.body.resp.bpp;
544
545 return (err);
546 }
547
548 int
bcm2835_mbox_fb_init(struct bcm2835_fb_config * fb)549 bcm2835_mbox_fb_init(struct bcm2835_fb_config *fb)
550 {
551 int err;
552 struct msg_fb_setup msg;
553
554 memset(&msg, 0, sizeof(msg));
555 msg.hdr.buf_size = sizeof(msg);
556 msg.hdr.code = BCM2835_MBOX_CODE_REQ;
557 BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, SET_PHYSICAL_W_H);
558 msg.physical_w_h.body.req.width = fb->xres;
559 msg.physical_w_h.body.req.height = fb->yres;
560 BCM2835_MBOX_INIT_TAG(&msg.virtual_w_h, SET_VIRTUAL_W_H);
561 msg.virtual_w_h.body.req.width = fb->vxres;
562 msg.virtual_w_h.body.req.height = fb->vyres;
563 BCM2835_MBOX_INIT_TAG(&msg.offset, SET_VIRTUAL_OFFSET);
564 msg.offset.body.req.x = fb->xoffset;
565 msg.offset.body.req.y = fb->yoffset;
566 BCM2835_MBOX_INIT_TAG(&msg.depth, SET_DEPTH);
567 msg.depth.body.req.bpp = fb->bpp;
568 BCM2835_MBOX_INIT_TAG(&msg.alpha, SET_ALPHA_MODE);
569 msg.alpha.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
570 BCM2835_MBOX_INIT_TAG(&msg.buffer, ALLOCATE_BUFFER);
571 msg.buffer.body.req.alignment = PAGE_SIZE;
572 BCM2835_MBOX_INIT_TAG(&msg.pitch, GET_PITCH);
573 msg.end_tag = 0;
574
575 err = bcm2835_mbox_property(&msg, sizeof(msg));
576 if (err == 0) {
577 fb->xres = msg.physical_w_h.body.resp.width;
578 fb->yres = msg.physical_w_h.body.resp.height;
579 fb->vxres = msg.virtual_w_h.body.resp.width;
580 fb->vyres = msg.virtual_w_h.body.resp.height;
581 fb->xoffset = msg.offset.body.resp.x;
582 fb->yoffset = msg.offset.body.resp.y;
583 fb->pitch = msg.pitch.body.resp.pitch;
584 fb->base = VCBUS_TO_ARMC(msg.buffer.body.resp.fb_address);
585 fb->size = msg.buffer.body.resp.fb_size;
586 }
587
588 return (err);
589 }
590