1/*-
2 * Copyright (c) 2011 NetApp, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $FreeBSD: stable/10/usr.sbin/bhyve/pci_virtio_net.c 268953 2014-07-21 19:08:02Z jhb $
|
| 26 * $FreeBSD: stable/10/usr.sbin/bhyve/pci_virtio_net.c 271685 2014-09-16 19:08:54Z grehan $ |
27 */
28
29#include <sys/cdefs.h>
|
30__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/pci_virtio_net.c 268953 2014-07-21 19:08:02Z jhb $");
|
| 30__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/pci_virtio_net.c 271685 2014-09-16 19:08:54Z grehan $"); |
31
32#include <sys/param.h>
33#include <sys/linker_set.h>
34#include <sys/select.h>
35#include <sys/uio.h>
36#include <sys/ioctl.h>
37#include <net/ethernet.h>
38
39#include <errno.h>
40#include <fcntl.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <stdint.h>
44#include <string.h>
45#include <strings.h>
46#include <unistd.h>
47#include <assert.h>
48#include <md5.h>
49#include <pthread.h>
50#include <pthread_np.h>
51
52#include "bhyverun.h"
53#include "pci_emul.h"
54#include "mevent.h"
55#include "virtio.h"
56
57#define VTNET_RINGSZ 1024
58
59#define VTNET_MAXSEGS 32
60
61/*
62 * Host capabilities. Note that we only offer a few of these.
63 */
64#define VIRTIO_NET_F_CSUM (1 << 0) /* host handles partial cksum */
65#define VIRTIO_NET_F_GUEST_CSUM (1 << 1) /* guest handles partial cksum */
66#define VIRTIO_NET_F_MAC (1 << 5) /* host supplies MAC */
67#define VIRTIO_NET_F_GSO_DEPREC (1 << 6) /* deprecated: host handles GSO */
68#define VIRTIO_NET_F_GUEST_TSO4 (1 << 7) /* guest can rcv TSOv4 */
69#define VIRTIO_NET_F_GUEST_TSO6 (1 << 8) /* guest can rcv TSOv6 */
70#define VIRTIO_NET_F_GUEST_ECN (1 << 9) /* guest can rcv TSO with ECN */
71#define VIRTIO_NET_F_GUEST_UFO (1 << 10) /* guest can rcv UFO */
72#define VIRTIO_NET_F_HOST_TSO4 (1 << 11) /* host can rcv TSOv4 */
73#define VIRTIO_NET_F_HOST_TSO6 (1 << 12) /* host can rcv TSOv6 */
74#define VIRTIO_NET_F_HOST_ECN (1 << 13) /* host can rcv TSO with ECN */
75#define VIRTIO_NET_F_HOST_UFO (1 << 14) /* host can rcv UFO */
76#define VIRTIO_NET_F_MRG_RXBUF (1 << 15) /* host can merge RX buffers */
77#define VIRTIO_NET_F_STATUS (1 << 16) /* config status field available */
78#define VIRTIO_NET_F_CTRL_VQ (1 << 17) /* control channel available */
79#define VIRTIO_NET_F_CTRL_RX (1 << 18) /* control channel RX mode support */
80#define VIRTIO_NET_F_CTRL_VLAN (1 << 19) /* control channel VLAN filtering */
81#define VIRTIO_NET_F_GUEST_ANNOUNCE \
82 (1 << 21) /* guest can send gratuitous pkts */
83
84#define VTNET_S_HOSTCAPS \
85 ( VIRTIO_NET_F_MAC | VIRTIO_NET_F_MRG_RXBUF | VIRTIO_NET_F_STATUS | \
86 VIRTIO_F_NOTIFY_ON_EMPTY)
87
88/*
89 * PCI config-space "registers"
90 */
91struct virtio_net_config {
92 uint8_t mac[6];
93 uint16_t status;
94} __packed;
95
96/*
97 * Queue definitions.
98 */
99#define VTNET_RXQ 0
100#define VTNET_TXQ 1
101#define VTNET_CTLQ 2 /* NB: not yet supported */
102
103#define VTNET_MAXQ 3
104
105/*
106 * Fixed network header size
107 */
108struct virtio_net_rxhdr {
109 uint8_t vrh_flags;
110 uint8_t vrh_gso_type;
111 uint16_t vrh_hdr_len;
112 uint16_t vrh_gso_size;
113 uint16_t vrh_csum_start;
114 uint16_t vrh_csum_offset;
115 uint16_t vrh_bufs;
116} __packed;
117
118/*
119 * Debug printf
120 */
121static int pci_vtnet_debug;
122#define DPRINTF(params) if (pci_vtnet_debug) printf params
123#define WPRINTF(params) printf params
124
125/*
126 * Per-device softc
127 */
128struct pci_vtnet_softc {
129 struct virtio_softc vsc_vs;
130 struct vqueue_info vsc_queues[VTNET_MAXQ - 1];
131 pthread_mutex_t vsc_mtx;
132 struct mevent *vsc_mevp;
133
134 int vsc_tapfd;
135 int vsc_rx_ready;
136 volatile int resetting; /* set and checked outside lock */
137
|
138 uint32_t vsc_features;
|
138 uint64_t vsc_features; /* negotiated features */
139 |
140 struct virtio_net_config vsc_config;
141
142 pthread_mutex_t rx_mtx;
143 int rx_in_progress;
|
144 int rx_vhdrlen;
145 int rx_merge; /* merged rx bufs in use */ |
146
147 pthread_t tx_tid;
148 pthread_mutex_t tx_mtx;
149 pthread_cond_t tx_cond;
150 int tx_in_progress;
151};
152
153static void pci_vtnet_reset(void *);
154/* static void pci_vtnet_notify(void *, struct vqueue_info *); */
155static int pci_vtnet_cfgread(void *, int, int, uint32_t *);
156static int pci_vtnet_cfgwrite(void *, int, int, uint32_t);
|
| 157static void pci_vtnet_neg_features(void *, uint64_t); |
158
159static struct virtio_consts vtnet_vi_consts = {
160 "vtnet", /* our name */
161 VTNET_MAXQ - 1, /* we currently support 2 virtqueues */
162 sizeof(struct virtio_net_config), /* config reg size */
163 pci_vtnet_reset, /* reset */
164 NULL, /* device-wide qnotify -- not used */
165 pci_vtnet_cfgread, /* read PCI config */
166 pci_vtnet_cfgwrite, /* write PCI config */
|
| 167 pci_vtnet_neg_features, /* apply negotiated features */ |
168 VTNET_S_HOSTCAPS, /* our capabilities */
169};
170
171/*
172 * If the transmit thread is active then stall until it is done.
173 */
174static void
175pci_vtnet_txwait(struct pci_vtnet_softc *sc)
176{
177
178 pthread_mutex_lock(&sc->tx_mtx);
179 while (sc->tx_in_progress) {
180 pthread_mutex_unlock(&sc->tx_mtx);
181 usleep(10000);
182 pthread_mutex_lock(&sc->tx_mtx);
183 }
184 pthread_mutex_unlock(&sc->tx_mtx);
185}
186
187/*
188 * If the receive thread is active then stall until it is done.
189 */
190static void
191pci_vtnet_rxwait(struct pci_vtnet_softc *sc)
192{
193
194 pthread_mutex_lock(&sc->rx_mtx);
195 while (sc->rx_in_progress) {
196 pthread_mutex_unlock(&sc->rx_mtx);
197 usleep(10000);
198 pthread_mutex_lock(&sc->rx_mtx);
199 }
200 pthread_mutex_unlock(&sc->rx_mtx);
201}
202
203static void
204pci_vtnet_reset(void *vsc)
205{
206 struct pci_vtnet_softc *sc = vsc;
207
208 DPRINTF(("vtnet: device reset requested !\n"));
209
210 sc->resetting = 1;
211
212 /*
213 * Wait for the transmit and receive threads to finish their
214 * processing.
215 */
216 pci_vtnet_txwait(sc);
217 pci_vtnet_rxwait(sc);
218
219 sc->vsc_rx_ready = 0;
|
220 sc->rx_merge = 1;
221 sc->rx_vhdrlen = sizeof(struct virtio_net_rxhdr); |
222
223 /* now reset rings, MSI-X vectors, and negotiated capabilities */
224 vi_reset_dev(&sc->vsc_vs);
225
226 sc->resetting = 0;
227}
228
229/*
230 * Called to send a buffer chain out to the tap device
231 */
232static void
233pci_vtnet_tap_tx(struct pci_vtnet_softc *sc, struct iovec *iov, int iovcnt,
234 int len)
235{
236 static char pad[60]; /* all zero bytes */
237
238 if (sc->vsc_tapfd == -1)
239 return;
240
241 /*
242 * If the length is < 60, pad out to that and add the
243 * extra zero'd segment to the iov. It is guaranteed that
244 * there is always an extra iov available by the caller.
245 */
246 if (len < 60) {
247 iov[iovcnt].iov_base = pad;
248 iov[iovcnt].iov_len = 60 - len;
249 iovcnt++;
250 }
251 (void) writev(sc->vsc_tapfd, iov, iovcnt);
252}
253
254/*
255 * Called when there is read activity on the tap file descriptor.
256 * Each buffer posted by the guest is assumed to be able to contain
257 * an entire ethernet frame + rx header.
258 * MP note: the dummybuf is only used for discarding frames, so there
259 * is no need for it to be per-vtnet or locked.
260 */
261static uint8_t dummybuf[2048];
262
|
263static __inline struct iovec *
264rx_iov_trim(struct iovec *iov, int *niov, int tlen)
265{
266 struct iovec *riov;
267
268 /* XXX short-cut: assume first segment is >= tlen */
269 assert(iov[0].iov_len >= tlen);
270
271 iov[0].iov_len -= tlen;
272 if (iov[0].iov_len == 0) {
273 assert(*niov > 1);
274 *niov -= 1;
275 riov = &iov[1];
276 } else {
277 iov[0].iov_base = (void *)((uintptr_t)iov[0].iov_base + tlen);
278 riov = &iov[0];
279 }
280
281 return (riov);
282}
283 |
284static void
285pci_vtnet_tap_rx(struct pci_vtnet_softc *sc)
286{
|
| 287 struct iovec iov[VTNET_MAXSEGS], *riov; |
288 struct vqueue_info *vq;
|
260 struct virtio_net_rxhdr *vrx;
261 uint8_t *buf;
262 int len;
263 struct iovec iov;
|
289 void *vrx;
290 int len, n; |
291
292 /*
293 * Should never be called without a valid tap fd
294 */
295 assert(sc->vsc_tapfd != -1);
296
297 /*
298 * But, will be called when the rx ring hasn't yet
299 * been set up or the guest is resetting the device.
300 */
301 if (!sc->vsc_rx_ready || sc->resetting) {
302 /*
303 * Drop the packet and try later.
304 */
305 (void) read(sc->vsc_tapfd, dummybuf, sizeof(dummybuf));
306 return;
307 }
308
309 /*
310 * Check for available rx buffers
311 */
312 vq = &sc->vsc_queues[VTNET_RXQ];
313 vq_startchains(vq);
314 if (!vq_has_descs(vq)) {
315 /*
316 * Drop the packet and try later. Interrupt on
317 * empty, if that's negotiated.
318 */
319 (void) read(sc->vsc_tapfd, dummybuf, sizeof(dummybuf));
320 vq_endchains(vq, 1);
321 return;
322 }
323
324 do {
325 /*
|
299 * Get descriptor chain, which should have just
300 * one descriptor in it.
301 * ??? allow guests to use multiple descs?
|
| 326 * Get descriptor chain. |
327 */
|
303 assert(vq_getchain(vq, &iov, 1, NULL) == 1);
|
328 n = vq_getchain(vq, iov, VTNET_MAXSEGS, NULL);
329 assert(n >= 1 && n <= VTNET_MAXSEGS); |
330
331 /*
332 * Get a pointer to the rx header, and use the
333 * data immediately following it for the packet buffer.
334 */
|
309 vrx = iov.iov_base;
310 buf = (uint8_t *)(vrx + 1);
|
335 vrx = iov[0].iov_base;
336 riov = rx_iov_trim(iov, &n, sc->rx_vhdrlen); |
337
|
312 len = read(sc->vsc_tapfd, buf,
313 iov.iov_len - sizeof(struct virtio_net_rxhdr));
|
| 338 len = readv(sc->vsc_tapfd, riov, n); |
339
340 if (len < 0 && errno == EWOULDBLOCK) {
341 /*
342 * No more packets, but still some avail ring
343 * entries. Interrupt if needed/appropriate.
344 */
345 vq_endchains(vq, 0);
346 return;
347 }
348
349 /*
350 * The only valid field in the rx packet header is the
|
326 * number of buffers, which is always 1 without TSO
327 * support.
|
| 351 * number of buffers if merged rx bufs were negotiated. |
352 */
|
329 memset(vrx, 0, sizeof(struct virtio_net_rxhdr));
330 vrx->vrh_bufs = 1;
|
| 353 memset(vrx, 0, sc->rx_vhdrlen); |
354
|
355 if (sc->rx_merge) {
356 struct virtio_net_rxhdr *vrxh;
357
358 vrxh = vrx;
359 vrxh->vrh_bufs = 1;
360 }
361 |
362 /*
363 * Release this chain and handle more chains.
364 */
|
335 vq_relchain(vq, len + sizeof(struct virtio_net_rxhdr));
|
| 365 vq_relchain(vq, len + sc->rx_vhdrlen); |
366 } while (vq_has_descs(vq));
367
368 /* Interrupt if needed, including for NOTIFY_ON_EMPTY. */
369 vq_endchains(vq, 1);
370}
371
372static void
373pci_vtnet_tap_callback(int fd, enum ev_type type, void *param)
374{
375 struct pci_vtnet_softc *sc = param;
376
377 pthread_mutex_lock(&sc->rx_mtx);
378 sc->rx_in_progress = 1;
379 pci_vtnet_tap_rx(sc);
380 sc->rx_in_progress = 0;
381 pthread_mutex_unlock(&sc->rx_mtx);
382
383}
384
385static void
386pci_vtnet_ping_rxq(void *vsc, struct vqueue_info *vq)
387{
388 struct pci_vtnet_softc *sc = vsc;
389
390 /*
391 * A qnotify means that the rx process can now begin
392 */
393 if (sc->vsc_rx_ready == 0) {
394 sc->vsc_rx_ready = 1;
395 }
396}
397
398static void
399pci_vtnet_proctx(struct pci_vtnet_softc *sc, struct vqueue_info *vq)
400{
401 struct iovec iov[VTNET_MAXSEGS + 1];
402 int i, n;
403 int plen, tlen;
404
405 /*
406 * Obtain chain of descriptors. The first one is
407 * really the header descriptor, so we need to sum
408 * up two lengths: packet length and transfer length.
409 */
410 n = vq_getchain(vq, iov, VTNET_MAXSEGS, NULL);
411 assert(n >= 1 && n <= VTNET_MAXSEGS);
412 plen = 0;
413 tlen = iov[0].iov_len;
414 for (i = 1; i < n; i++) {
415 plen += iov[i].iov_len;
416 tlen += iov[i].iov_len;
417 }
418
419 DPRINTF(("virtio: packet send, %d bytes, %d segs\n\r", plen, n));
420 pci_vtnet_tap_tx(sc, &iov[1], n - 1, plen);
421
422 /* chain is processed, release it and set tlen */
423 vq_relchain(vq, tlen);
424}
425
426static void
427pci_vtnet_ping_txq(void *vsc, struct vqueue_info *vq)
428{
429 struct pci_vtnet_softc *sc = vsc;
430
431 /*
432 * Any ring entries to process?
433 */
434 if (!vq_has_descs(vq))
435 return;
436
437 /* Signal the tx thread for processing */
438 pthread_mutex_lock(&sc->tx_mtx);
439 if (sc->tx_in_progress == 0)
440 pthread_cond_signal(&sc->tx_cond);
441 pthread_mutex_unlock(&sc->tx_mtx);
442}
443
444/*
445 * Thread which will handle processing of TX desc
446 */
447static void *
448pci_vtnet_tx_thread(void *param)
449{
450 struct pci_vtnet_softc *sc = param;
451 struct vqueue_info *vq;
452 int have_work, error;
453
454 vq = &sc->vsc_queues[VTNET_TXQ];
455
456 /*
457 * Let us wait till the tx queue pointers get initialised &
458 * first tx signaled
459 */
460 pthread_mutex_lock(&sc->tx_mtx);
461 error = pthread_cond_wait(&sc->tx_cond, &sc->tx_mtx);
462 assert(error == 0);
463
464 for (;;) {
465 /* note - tx mutex is locked here */
466 do {
467 if (sc->resetting)
468 have_work = 0;
469 else
470 have_work = vq_has_descs(vq);
471
472 if (!have_work) {
473 sc->tx_in_progress = 0;
474 error = pthread_cond_wait(&sc->tx_cond,
475 &sc->tx_mtx);
476 assert(error == 0);
477 }
478 } while (!have_work);
479 sc->tx_in_progress = 1;
480 pthread_mutex_unlock(&sc->tx_mtx);
481
482 vq_startchains(vq);
483 do {
484 /*
485 * Run through entries, placing them into
486 * iovecs and sending when an end-of-packet
487 * is found
488 */
489 pci_vtnet_proctx(sc, vq);
490 } while (vq_has_descs(vq));
491
492 /*
493 * Generate an interrupt if needed.
494 */
495 vq_endchains(vq, 1);
496
497 pthread_mutex_lock(&sc->tx_mtx);
498 }
499}
500
501#ifdef notyet
502static void
503pci_vtnet_ping_ctlq(void *vsc, struct vqueue_info *vq)
504{
505
506 DPRINTF(("vtnet: control qnotify!\n\r"));
507}
508#endif
509
510static int
511pci_vtnet_parsemac(char *mac_str, uint8_t *mac_addr)
512{
513 struct ether_addr *ea;
514 char *tmpstr;
515 char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
516
517 tmpstr = strsep(&mac_str,"=");
518
519 if ((mac_str != NULL) && (!strcmp(tmpstr,"mac"))) {
520 ea = ether_aton(mac_str);
521
522 if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
523 memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
524 fprintf(stderr, "Invalid MAC %s\n", mac_str);
525 return (EINVAL);
526 } else
527 memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
528 }
529
530 return (0);
531}
532
533
534static int
535pci_vtnet_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
536{
537 MD5_CTX mdctx;
538 unsigned char digest[16];
539 char nstr[80];
540 char tname[MAXCOMLEN + 1];
541 struct pci_vtnet_softc *sc;
542 char *devname;
543 char *vtopts;
544 int mac_provided;
545
546 sc = calloc(1, sizeof(struct pci_vtnet_softc));
547
548 pthread_mutex_init(&sc->vsc_mtx, NULL);
549
550 vi_softc_linkup(&sc->vsc_vs, &vtnet_vi_consts, sc, pi, sc->vsc_queues);
551 sc->vsc_vs.vs_mtx = &sc->vsc_mtx;
552
553 sc->vsc_queues[VTNET_RXQ].vq_qsize = VTNET_RINGSZ;
554 sc->vsc_queues[VTNET_RXQ].vq_notify = pci_vtnet_ping_rxq;
555 sc->vsc_queues[VTNET_TXQ].vq_qsize = VTNET_RINGSZ;
556 sc->vsc_queues[VTNET_TXQ].vq_notify = pci_vtnet_ping_txq;
557#ifdef notyet
558 sc->vsc_queues[VTNET_CTLQ].vq_qsize = VTNET_RINGSZ;
559 sc->vsc_queues[VTNET_CTLQ].vq_notify = pci_vtnet_ping_ctlq;
560#endif
561
562 /*
563 * Attempt to open the tap device and read the MAC address
564 * if specified
565 */
566 mac_provided = 0;
567 sc->vsc_tapfd = -1;
568 if (opts != NULL) {
569 char tbuf[80];
570 int err;
571
572 devname = vtopts = strdup(opts);
573 (void) strsep(&vtopts, ",");
574
575 if (vtopts != NULL) {
576 err = pci_vtnet_parsemac(vtopts, sc->vsc_config.mac);
577 if (err != 0) {
578 free(devname);
579 return (err);
580 }
581 mac_provided = 1;
582 }
583
584 strcpy(tbuf, "/dev/");
585 strlcat(tbuf, devname, sizeof(tbuf));
586
587 free(devname);
588
589 sc->vsc_tapfd = open(tbuf, O_RDWR);
590 if (sc->vsc_tapfd == -1) {
591 WPRINTF(("open of tap device %s failed\n", tbuf));
592 } else {
593 /*
594 * Set non-blocking and register for read
595 * notifications with the event loop
596 */
597 int opt = 1;
598 if (ioctl(sc->vsc_tapfd, FIONBIO, &opt) < 0) {
599 WPRINTF(("tap device O_NONBLOCK failed\n"));
600 close(sc->vsc_tapfd);
601 sc->vsc_tapfd = -1;
602 }
603
604 sc->vsc_mevp = mevent_add(sc->vsc_tapfd,
605 EVF_READ,
606 pci_vtnet_tap_callback,
607 sc);
608 if (sc->vsc_mevp == NULL) {
609 WPRINTF(("Could not register event\n"));
610 close(sc->vsc_tapfd);
611 sc->vsc_tapfd = -1;
612 }
613 }
614 }
615
616 /*
617 * The default MAC address is the standard NetApp OUI of 00-a0-98,
618 * followed by an MD5 of the PCI slot/func number and dev name
619 */
620 if (!mac_provided) {
621 snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
622 pi->pi_func, vmname);
623
624 MD5Init(&mdctx);
625 MD5Update(&mdctx, nstr, strlen(nstr));
626 MD5Final(digest, &mdctx);
627
628 sc->vsc_config.mac[0] = 0x00;
629 sc->vsc_config.mac[1] = 0xa0;
630 sc->vsc_config.mac[2] = 0x98;
631 sc->vsc_config.mac[3] = digest[0];
632 sc->vsc_config.mac[4] = digest[1];
633 sc->vsc_config.mac[5] = digest[2];
634 }
635
636 /* initialize config space */
637 pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_NET);
638 pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR);
639 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_NETWORK);
640 pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_NET);
641
642 pci_lintr_request(pi);
643
644 /* link always up */
645 sc->vsc_config.status = 1;
646
647 /* use BAR 1 to map MSI-X table and PBA, if we're using MSI-X */
648 if (vi_intr_init(&sc->vsc_vs, 1, fbsdrun_virtio_msix()))
649 return (1);
650
651 /* use BAR 0 to map config regs in IO space */
652 vi_set_io_bar(&sc->vsc_vs, 0);
653
654 sc->resetting = 0;
655
|
656 sc->rx_merge = 1;
657 sc->rx_vhdrlen = sizeof(struct virtio_net_rxhdr); |
658 sc->rx_in_progress = 0;
659 pthread_mutex_init(&sc->rx_mtx, NULL);
660
661 /*
662 * Initialize tx semaphore & spawn TX processing thread.
663 * As of now, only one thread for TX desc processing is
664 * spawned.
665 */
666 sc->tx_in_progress = 0;
667 pthread_mutex_init(&sc->tx_mtx, NULL);
668 pthread_cond_init(&sc->tx_cond, NULL);
669 pthread_create(&sc->tx_tid, NULL, pci_vtnet_tx_thread, (void *)sc);
670 snprintf(tname, sizeof(tname), "vtnet-%d:%d tx", pi->pi_slot,
671 pi->pi_func);
672 pthread_set_name_np(sc->tx_tid, tname);
673
674 return (0);
675}
676
677static int
678pci_vtnet_cfgwrite(void *vsc, int offset, int size, uint32_t value)
679{
680 struct pci_vtnet_softc *sc = vsc;
681 void *ptr;
682
683 if (offset < 6) {
684 assert(offset + size <= 6);
685 /*
686 * The driver is allowed to change the MAC address
687 */
688 ptr = &sc->vsc_config.mac[offset];
689 memcpy(ptr, &value, size);
690 } else {
|
| 691 /* silently ignore other writes */ |
692 DPRINTF(("vtnet: write to readonly reg %d\n\r", offset));
|
660 return (1);
|
693 }
|
| 694 |
695 return (0);
696}
697
698static int
699pci_vtnet_cfgread(void *vsc, int offset, int size, uint32_t *retval)
700{
701 struct pci_vtnet_softc *sc = vsc;
702 void *ptr;
703
704 ptr = (uint8_t *)&sc->vsc_config + offset;
705 memcpy(retval, ptr, size);
706 return (0);
707}
708
|
709static void
710pci_vtnet_neg_features(void *vsc, uint64_t negotiated_features)
711{
712 struct pci_vtnet_softc *sc = vsc;
713
714 sc->vsc_features = negotiated_features;
715
716 if (!(sc->vsc_features & VIRTIO_NET_F_MRG_RXBUF)) {
717 sc->rx_merge = 0;
718 /* non-merge rx header is 2 bytes shorter */
719 sc->rx_vhdrlen -= 2;
720 }
721}
722 |
723struct pci_devemu pci_de_vnet = {
724 .pe_emu = "virtio-net",
725 .pe_init = pci_vtnet_init,
726 .pe_barwrite = vi_pci_write,
727 .pe_barread = vi_pci_read
728};
729PCI_EMUL_SET(pci_de_vnet);
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