Bring in vmx(4) (VMware virtual network driver, aka vmxnet3).
[dragonfly.git] / sys / dev / virtual / vmware / vmxnet3 / if_vmx.c
1 /*-
2  * Copyright (c) 2013 Tsubai Masanari
3  * Copyright (c) 2013 Bryan Venteicher <bryanv@FreeBSD.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  *
17  * $OpenBSD: src/sys/dev/pci/if_vmx.c,v 1.11 2013/06/22 00:28:10 uebayasi Exp $
18  * $FreeBSD: head/sys/dev/vmware/vmxnet3/if_vmx.c 318867 2017-05-25 10:49:56Z avg $
19  */
20
21 /* Driver for VMware vmxnet3 virtual ethernet devices. */
22
23 #include <sys/param.h>
24 #include <sys/systm.h>
25 #include <sys/device.h>
26 #include <sys/eventhandler.h>
27 #include <sys/kernel.h>
28 #include <sys/endian.h>
29 #include <sys/sockio.h>
30 #include <sys/mbuf.h>
31 #include <sys/malloc.h>
32 #include <sys/module.h>
33 #include <sys/socket.h>
34 #include <sys/sysctl.h>
35 #include <sys/taskqueue.h>
36 #include <vm/vm.h>
37 #include <vm/pmap.h>
38
39 #include <net/ethernet.h>
40 #include <net/if.h>
41 #include <net/if_var.h>
42 #include <net/ifq_var.h>
43 #include <net/if_arp.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <net/if_media.h>
47 #include <net/vlan/if_vlan_ether.h>
48 #include <net/vlan/if_vlan_var.h>
49
50 #include <net/bpf.h>
51
52 #include <netinet/in_systm.h>
53 #include <netinet/in.h>
54 #include <netinet/ip.h>
55 #include <netinet/ip6.h>
56 #include <netinet6/ip6_var.h>
57 #include <netinet/udp.h>
58 #include <netinet/tcp.h>
59
60 #include <sys/in_cksum.h>
61
62 #include <sys/bus.h>
63 #include <sys/rman.h>
64
65 #include <bus/pci/pcireg.h>
66 #include <bus/pci/pcivar.h>
67
68 #define VMXNET3_LEGACY_TX 1     /* XXX we need this at the moment */
69 #include "if_vmxreg.h"
70 #include "if_vmxvar.h"
71
72 #include "opt_inet.h"
73 #include "opt_inet6.h"
74
75 #ifdef VMXNET3_FAILPOINTS
76 #include <sys/fail.h>
77 static SYSCTL_NODE(DEBUG_FP, OID_AUTO, vmxnet3, CTLFLAG_RW, 0,
78     "vmxnet3 fail points");
79 #define VMXNET3_FP      _debug_fail_point_vmxnet3
80 #endif
81
82 static int      vmxnet3_probe(device_t);
83 static int      vmxnet3_attach(device_t);
84 static int      vmxnet3_detach(device_t);
85 static int      vmxnet3_shutdown(device_t);
86
87 static int      vmxnet3_alloc_resources(struct vmxnet3_softc *);
88 static void     vmxnet3_free_resources(struct vmxnet3_softc *);
89 static int      vmxnet3_check_version(struct vmxnet3_softc *);
90 static void     vmxnet3_initial_config(struct vmxnet3_softc *);
91 static void     vmxnet3_check_multiqueue(struct vmxnet3_softc *);
92
93 #ifdef __FreeBSD__
94 static int      vmxnet3_alloc_msix_interrupts(struct vmxnet3_softc *);
95 static int      vmxnet3_alloc_msi_interrupts(struct vmxnet3_softc *);
96 #else
97 static int      vmxnet3_alloc_msi_interrupts(struct vmxnet3_softc *);
98 #endif
99 static int      vmxnet3_alloc_legacy_interrupts(struct vmxnet3_softc *);
100 static int      vmxnet3_alloc_interrupt(struct vmxnet3_softc *, int, int,
101                     struct vmxnet3_interrupt *);
102 static int      vmxnet3_alloc_intr_resources(struct vmxnet3_softc *);
103 #ifdef __FreeBSD__
104 static int      vmxnet3_setup_msix_interrupts(struct vmxnet3_softc *);
105 #endif
106 static int      vmxnet3_setup_legacy_interrupt(struct vmxnet3_softc *);
107 static int      vmxnet3_setup_interrupts(struct vmxnet3_softc *);
108 static int      vmxnet3_alloc_interrupts(struct vmxnet3_softc *);
109
110 static void     vmxnet3_free_interrupt(struct vmxnet3_softc *,
111                     struct vmxnet3_interrupt *);
112 static void     vmxnet3_free_interrupts(struct vmxnet3_softc *);
113
114 #ifndef VMXNET3_LEGACY_TX
115 static int      vmxnet3_alloc_taskqueue(struct vmxnet3_softc *);
116 static void     vmxnet3_start_taskqueue(struct vmxnet3_softc *);
117 static void     vmxnet3_drain_taskqueue(struct vmxnet3_softc *);
118 static void     vmxnet3_free_taskqueue(struct vmxnet3_softc *);
119 #endif
120
121 static int      vmxnet3_init_rxq(struct vmxnet3_softc *, int);
122 static int      vmxnet3_init_txq(struct vmxnet3_softc *, int);
123 static int      vmxnet3_alloc_rxtx_queues(struct vmxnet3_softc *);
124 static void     vmxnet3_destroy_rxq(struct vmxnet3_rxqueue *);
125 static void     vmxnet3_destroy_txq(struct vmxnet3_txqueue *);
126 static void     vmxnet3_free_rxtx_queues(struct vmxnet3_softc *);
127
128 static int      vmxnet3_alloc_shared_data(struct vmxnet3_softc *);
129 static void     vmxnet3_free_shared_data(struct vmxnet3_softc *);
130 static int      vmxnet3_alloc_txq_data(struct vmxnet3_softc *);
131 static void     vmxnet3_free_txq_data(struct vmxnet3_softc *);
132 static int      vmxnet3_alloc_rxq_data(struct vmxnet3_softc *);
133 static void     vmxnet3_free_rxq_data(struct vmxnet3_softc *);
134 static int      vmxnet3_alloc_queue_data(struct vmxnet3_softc *);
135 static void     vmxnet3_free_queue_data(struct vmxnet3_softc *);
136 static int      vmxnet3_alloc_mcast_table(struct vmxnet3_softc *);
137 static void     vmxnet3_init_shared_data(struct vmxnet3_softc *);
138 static void     vmxnet3_init_hwassist(struct vmxnet3_softc *);
139 static void     vmxnet3_reinit_interface(struct vmxnet3_softc *);
140 static void     vmxnet3_reinit_rss_shared_data(struct vmxnet3_softc *);
141 static void     vmxnet3_reinit_shared_data(struct vmxnet3_softc *);
142 static int      vmxnet3_alloc_data(struct vmxnet3_softc *);
143 static void     vmxnet3_free_data(struct vmxnet3_softc *);
144 static int      vmxnet3_setup_interface(struct vmxnet3_softc *);
145
146 static void     vmxnet3_evintr(struct vmxnet3_softc *);
147 static void     vmxnet3_txq_eof(struct vmxnet3_txqueue *);
148 static void     vmxnet3_rx_csum(struct vmxnet3_rxcompdesc *, struct mbuf *);
149 static int      vmxnet3_newbuf(struct vmxnet3_softc *, struct vmxnet3_rxring *);
150 static void     vmxnet3_rxq_eof_discard(struct vmxnet3_rxqueue *,
151                     struct vmxnet3_rxring *, int);
152 static void     vmxnet3_rxq_eof(struct vmxnet3_rxqueue *);
153 static void     vmxnet3_legacy_intr(void *);
154 #ifdef __FreeBSD__
155 static void     vmxnet3_txq_intr(void *);
156 static void     vmxnet3_rxq_intr(void *);
157 static void     vmxnet3_event_intr(void *);
158 #endif
159
160 static void     vmxnet3_txstop(struct vmxnet3_softc *, struct vmxnet3_txqueue *);
161 static void     vmxnet3_rxstop(struct vmxnet3_softc *, struct vmxnet3_rxqueue *);
162 static void     vmxnet3_stop(struct vmxnet3_softc *);
163
164 static void     vmxnet3_txinit(struct vmxnet3_softc *, struct vmxnet3_txqueue *);
165 static int      vmxnet3_rxinit(struct vmxnet3_softc *, struct vmxnet3_rxqueue *);
166 static int      vmxnet3_reinit_queues(struct vmxnet3_softc *);
167 static int      vmxnet3_enable_device(struct vmxnet3_softc *);
168 static void     vmxnet3_reinit_rxfilters(struct vmxnet3_softc *);
169 static int      vmxnet3_reinit(struct vmxnet3_softc *);
170 static void     vmxnet3_init_locked(struct vmxnet3_softc *);
171 static void     vmxnet3_init(void *);
172
173 static int      vmxnet3_txq_offload_ctx(struct vmxnet3_txqueue *,struct mbuf *,
174                     int *, int *, int *);
175 static int      vmxnet3_txq_load_mbuf(struct vmxnet3_txqueue *, struct mbuf **,
176                     bus_dmamap_t, bus_dma_segment_t [], int *);
177 static void     vmxnet3_txq_unload_mbuf(struct vmxnet3_txqueue *, bus_dmamap_t);
178 static int      vmxnet3_txq_encap(struct vmxnet3_txqueue *, struct mbuf **);
179 #ifdef VMXNET3_LEGACY_TX
180 static void     vmxnet3_start_locked(struct ifnet *);
181 static void     vmxnet3_start(struct ifnet *, struct ifaltq_subque *);
182 #else
183 static int      vmxnet3_txq_mq_start_locked(struct vmxnet3_txqueue *,
184                     struct mbuf *);
185 static int      vmxnet3_txq_mq_start(struct ifnet *, struct mbuf *);
186 static void     vmxnet3_txq_tq_deferred(void *, int);
187 #endif
188 static void     vmxnet3_txq_start(struct vmxnet3_txqueue *);
189 static void     vmxnet3_tx_start_all(struct vmxnet3_softc *);
190
191 static void     vmxnet3_update_vlan_filter(struct vmxnet3_softc *, int,
192                     uint16_t);
193 static void     vmxnet3_register_vlan(void *, struct ifnet *, uint16_t);
194 static void     vmxnet3_unregister_vlan(void *, struct ifnet *, uint16_t);
195 static void     vmxnet3_set_rxfilter(struct vmxnet3_softc *);
196 static int      vmxnet3_change_mtu(struct vmxnet3_softc *, int);
197 static int      vmxnet3_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
198
199 #ifndef VMXNET3_LEGACY_TX
200 static void     vmxnet3_qflush(struct ifnet *);
201 #endif
202
203 static int      vmxnet3_watchdog(struct vmxnet3_txqueue *);
204 static void     vmxnet3_refresh_host_stats(struct vmxnet3_softc *);
205 static void     vmxnet3_txq_accum_stats(struct vmxnet3_txqueue *,
206                     struct vmxnet3_txq_stats *);
207 static void     vmxnet3_rxq_accum_stats(struct vmxnet3_rxqueue *,
208                     struct vmxnet3_rxq_stats *);
209 static void     vmxnet3_tick(void *);
210 static void     vmxnet3_link_status(struct vmxnet3_softc *);
211 static void     vmxnet3_media_status(struct ifnet *, struct ifmediareq *);
212 static int      vmxnet3_media_change(struct ifnet *);
213 static void     vmxnet3_set_lladdr(struct vmxnet3_softc *);
214 static void     vmxnet3_get_lladdr(struct vmxnet3_softc *);
215
216 static void     vmxnet3_setup_txq_sysctl(struct vmxnet3_txqueue *,
217                     struct sysctl_ctx_list *, struct sysctl_oid_list *);
218 static void     vmxnet3_setup_rxq_sysctl(struct vmxnet3_rxqueue *,
219                     struct sysctl_ctx_list *, struct sysctl_oid_list *);
220 static void     vmxnet3_setup_queue_sysctl(struct vmxnet3_softc *,
221                     struct sysctl_ctx_list *, struct sysctl_oid_list *);
222 static void     vmxnet3_setup_sysctl(struct vmxnet3_softc *);
223
224 static void     vmxnet3_write_bar0(struct vmxnet3_softc *, bus_size_t,
225                     uint32_t);
226 static uint32_t vmxnet3_read_bar1(struct vmxnet3_softc *, bus_size_t);
227 static void     vmxnet3_write_bar1(struct vmxnet3_softc *, bus_size_t,
228                     uint32_t);
229 static void     vmxnet3_write_cmd(struct vmxnet3_softc *, uint32_t);
230 static uint32_t vmxnet3_read_cmd(struct vmxnet3_softc *, uint32_t);
231
232 static void     vmxnet3_enable_intr(struct vmxnet3_softc *, int);
233 static void     vmxnet3_disable_intr(struct vmxnet3_softc *, int);
234 static void     vmxnet3_enable_all_intrs(struct vmxnet3_softc *);
235 static void     vmxnet3_disable_all_intrs(struct vmxnet3_softc *);
236
237 static int      vmxnet3_dma_malloc(struct vmxnet3_softc *, bus_size_t,
238                     bus_size_t, struct vmxnet3_dma_alloc *);
239 static void     vmxnet3_dma_free(struct vmxnet3_softc *,
240                     struct vmxnet3_dma_alloc *);
241 static int      vmxnet3_tunable_int(struct vmxnet3_softc *,
242                     const char *, int);
243
244 typedef enum {
245         VMXNET3_BARRIER_RD,
246         VMXNET3_BARRIER_WR,
247         VMXNET3_BARRIER_RDWR,
248 } vmxnet3_barrier_t;
249
250 static void     vmxnet3_barrier(struct vmxnet3_softc *, vmxnet3_barrier_t);
251
252 /* Tunables. */
253 static int vmxnet3_mq_disable = 0;
254 TUNABLE_INT("hw.vmx.mq_disable", &vmxnet3_mq_disable);
255 static int vmxnet3_default_txnqueue = VMXNET3_DEF_TX_QUEUES;
256 TUNABLE_INT("hw.vmx.txnqueue", &vmxnet3_default_txnqueue);
257 static int vmxnet3_default_rxnqueue = VMXNET3_DEF_RX_QUEUES;
258 TUNABLE_INT("hw.vmx.rxnqueue", &vmxnet3_default_rxnqueue);
259 static int vmxnet3_default_txndesc = VMXNET3_DEF_TX_NDESC;
260 TUNABLE_INT("hw.vmx.txndesc", &vmxnet3_default_txndesc);
261 static int vmxnet3_default_rxndesc = VMXNET3_DEF_RX_NDESC;
262 TUNABLE_INT("hw.vmx.rxndesc", &vmxnet3_default_rxndesc);
263
264 static device_method_t vmxnet3_methods[] = {
265         /* Device interface. */
266         DEVMETHOD(device_probe,         vmxnet3_probe),
267         DEVMETHOD(device_attach,        vmxnet3_attach),
268         DEVMETHOD(device_detach,        vmxnet3_detach),
269         DEVMETHOD(device_shutdown,      vmxnet3_shutdown),
270
271         DEVMETHOD_END
272 };
273
274 static driver_t vmxnet3_driver = {
275         "vmx", vmxnet3_methods, sizeof(struct vmxnet3_softc)
276 };
277
278 static devclass_t vmxnet3_devclass;
279 DRIVER_MODULE(vmx, pci, vmxnet3_driver, vmxnet3_devclass, 0, 0);
280
281 MODULE_DEPEND(vmx, pci, 1, 1, 1);
282 MODULE_DEPEND(vmx, ether, 1, 1, 1);
283
284 #define VMXNET3_VMWARE_VENDOR_ID        0x15AD
285 #define VMXNET3_VMWARE_DEVICE_ID        0x07B0
286
287 static int
288 vmxnet3_probe(device_t dev)
289 {
290
291         if (pci_get_vendor(dev) == VMXNET3_VMWARE_VENDOR_ID &&
292             pci_get_device(dev) == VMXNET3_VMWARE_DEVICE_ID) {
293                 device_set_desc(dev, "VMware VMXNET3 Ethernet Adapter");
294                 return (BUS_PROBE_DEFAULT);
295         }
296
297         return (ENXIO);
298 }
299
300 static int
301 vmxnet3_attach(device_t dev)
302 {
303         struct vmxnet3_softc *sc;
304         int error;
305
306         sc = device_get_softc(dev);
307         sc->vmx_dev = dev;
308
309         pci_enable_busmaster(dev);
310
311         VMXNET3_CORE_LOCK_INIT(sc, device_get_nameunit(dev));
312         callout_init_lk(&sc->vmx_tick, &sc->vmx_lock);
313
314         vmxnet3_initial_config(sc);
315
316         error = vmxnet3_alloc_resources(sc);
317         if (error)
318                 goto fail;
319
320         error = vmxnet3_check_version(sc);
321         if (error)
322                 goto fail;
323
324         error = vmxnet3_alloc_rxtx_queues(sc);
325         if (error)
326                 goto fail;
327
328 #ifndef VMXNET3_LEGACY_TX
329         error = vmxnet3_alloc_taskqueue(sc);
330         if (error)
331                 goto fail;
332 #endif
333
334         error = vmxnet3_alloc_interrupts(sc);
335         if (error)
336                 goto fail;
337
338         vmxnet3_check_multiqueue(sc);
339
340         error = vmxnet3_alloc_data(sc);
341         if (error)
342                 goto fail;
343
344         error = vmxnet3_setup_interface(sc);
345         if (error)
346                 goto fail;
347
348         error = vmxnet3_setup_interrupts(sc);
349         if (error) {
350                 ether_ifdetach(sc->vmx_ifp);
351                 device_printf(dev, "could not set up interrupt\n");
352                 goto fail;
353         }
354
355         vmxnet3_setup_sysctl(sc);
356 #ifndef VMXNET3_LEGACY_TX
357         vmxnet3_start_taskqueue(sc);
358 #endif
359
360 fail:
361         if (error)
362                 vmxnet3_detach(dev);
363
364         return (error);
365 }
366
367 static int
368 vmxnet3_detach(device_t dev)
369 {
370         struct vmxnet3_softc *sc;
371         struct ifnet *ifp;
372
373         sc = device_get_softc(dev);
374         ifp = sc->vmx_ifp;
375
376         if (device_is_attached(dev)) {
377                 VMXNET3_CORE_LOCK(sc);
378                 vmxnet3_stop(sc);
379                 VMXNET3_CORE_UNLOCK(sc);
380
381                 callout_stop_sync(&sc->vmx_tick);
382 #ifndef VMXNET3_LEGACY_TX
383                 vmxnet3_drain_taskqueue(sc);
384 #endif
385
386                 ether_ifdetach(ifp);
387         }
388
389         if (sc->vmx_vlan_attach != NULL) {
390                 EVENTHANDLER_DEREGISTER(vlan_config, sc->vmx_vlan_attach);
391                 sc->vmx_vlan_attach = NULL;
392         }
393         if (sc->vmx_vlan_detach != NULL) {
394                 EVENTHANDLER_DEREGISTER(vlan_config, sc->vmx_vlan_detach);
395                 sc->vmx_vlan_detach = NULL;
396         }
397
398 #ifndef VMXNET3_LEGACY_TX
399         vmxnet3_free_taskqueue(sc);
400 #endif
401         vmxnet3_free_interrupts(sc);
402
403         if (ifp != NULL) {
404                 if_free(ifp);
405                 sc->vmx_ifp = NULL;
406         }
407
408         ifmedia_removeall(&sc->vmx_media);
409
410         vmxnet3_free_data(sc);
411         vmxnet3_free_resources(sc);
412         vmxnet3_free_rxtx_queues(sc);
413
414         VMXNET3_CORE_LOCK_DESTROY(sc);
415
416         return (0);
417 }
418
419 static int
420 vmxnet3_shutdown(device_t dev)
421 {
422
423         return (0);
424 }
425
426 static int
427 vmxnet3_alloc_resources(struct vmxnet3_softc *sc)
428 {
429         device_t dev;
430         int rid;
431
432         dev = sc->vmx_dev;
433
434         rid = PCIR_BAR(0);
435         sc->vmx_res0 = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
436             RF_ACTIVE);
437         if (sc->vmx_res0 == NULL) {
438                 device_printf(dev,
439                     "could not map BAR0 memory\n");
440                 return (ENXIO);
441         }
442
443         sc->vmx_iot0 = rman_get_bustag(sc->vmx_res0);
444         sc->vmx_ioh0 = rman_get_bushandle(sc->vmx_res0);
445
446         rid = PCIR_BAR(1);
447         sc->vmx_res1 = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
448             RF_ACTIVE);
449         if (sc->vmx_res1 == NULL) {
450                 device_printf(dev,
451                     "could not map BAR1 memory\n");
452                 return (ENXIO);
453         }
454
455         sc->vmx_iot1 = rman_get_bustag(sc->vmx_res1);
456         sc->vmx_ioh1 = rman_get_bushandle(sc->vmx_res1);
457
458         if (pci_find_extcap(dev, PCIY_MSIX, NULL) == 0) {
459                 rid = PCIR_BAR(2);
460                 sc->vmx_msix_res = bus_alloc_resource_any(dev,
461                     SYS_RES_MEMORY, &rid, RF_ACTIVE);
462         }
463
464         if (sc->vmx_msix_res == NULL)
465                 sc->vmx_flags |= VMXNET3_FLAG_NO_MSIX;
466
467         return (0);
468 }
469
470 static void
471 vmxnet3_free_resources(struct vmxnet3_softc *sc)
472 {
473         device_t dev;
474         int rid;
475
476         dev = sc->vmx_dev;
477
478         if (sc->vmx_res0 != NULL) {
479                 rid = PCIR_BAR(0);
480                 bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->vmx_res0);
481                 sc->vmx_res0 = NULL;
482         }
483
484         if (sc->vmx_res1 != NULL) {
485                 rid = PCIR_BAR(1);
486                 bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->vmx_res1);
487                 sc->vmx_res1 = NULL;
488         }
489
490         if (sc->vmx_msix_res != NULL) {
491                 rid = PCIR_BAR(2);
492                 bus_release_resource(dev, SYS_RES_MEMORY, rid,
493                     sc->vmx_msix_res);
494                 sc->vmx_msix_res = NULL;
495         }
496 }
497
498 static int
499 vmxnet3_check_version(struct vmxnet3_softc *sc)
500 {
501         device_t dev;
502         uint32_t version;
503
504         dev = sc->vmx_dev;
505
506         version = vmxnet3_read_bar1(sc, VMXNET3_BAR1_VRRS);
507         if ((version & 0x01) == 0) {
508                 device_printf(dev, "unsupported hardware version %#x\n",
509                     version);
510                 return (ENOTSUP);
511         }
512         vmxnet3_write_bar1(sc, VMXNET3_BAR1_VRRS, 1);
513
514         version = vmxnet3_read_bar1(sc, VMXNET3_BAR1_UVRS);
515         if ((version & 0x01) == 0) {
516                 device_printf(dev, "unsupported UPT version %#x\n", version);
517                 return (ENOTSUP);
518         }
519         vmxnet3_write_bar1(sc, VMXNET3_BAR1_UVRS, 1);
520
521         return (0);
522 }
523
524 static int
525 trunc_powerof2(int val)
526 {
527
528         return (1U << (fls(val) - 1));
529 }
530
531 static void
532 vmxnet3_initial_config(struct vmxnet3_softc *sc)
533 {
534         int nqueue, ndesc;
535
536         nqueue = vmxnet3_tunable_int(sc, "txnqueue", vmxnet3_default_txnqueue);
537         if (nqueue > VMXNET3_MAX_TX_QUEUES || nqueue < 1)
538                 nqueue = VMXNET3_DEF_TX_QUEUES;
539         if (nqueue > ncpus)
540                 nqueue = ncpus;
541         sc->vmx_max_ntxqueues = trunc_powerof2(nqueue);
542
543         nqueue = vmxnet3_tunable_int(sc, "rxnqueue", vmxnet3_default_rxnqueue);
544         if (nqueue > VMXNET3_MAX_RX_QUEUES || nqueue < 1)
545                 nqueue = VMXNET3_DEF_RX_QUEUES;
546         if (nqueue > ncpus)
547                 nqueue = ncpus;
548         sc->vmx_max_nrxqueues = trunc_powerof2(nqueue);
549
550         if (vmxnet3_tunable_int(sc, "mq_disable", vmxnet3_mq_disable)) {
551                 sc->vmx_max_nrxqueues = 1;
552                 sc->vmx_max_ntxqueues = 1;
553         }
554
555         ndesc = vmxnet3_tunable_int(sc, "txd", vmxnet3_default_txndesc);
556         if (ndesc > VMXNET3_MAX_TX_NDESC || ndesc < VMXNET3_MIN_TX_NDESC)
557                 ndesc = VMXNET3_DEF_TX_NDESC;
558         if (ndesc & VMXNET3_MASK_TX_NDESC)
559                 ndesc &= ~VMXNET3_MASK_TX_NDESC;
560         sc->vmx_ntxdescs = ndesc;
561
562         ndesc = vmxnet3_tunable_int(sc, "rxd", vmxnet3_default_rxndesc);
563         if (ndesc > VMXNET3_MAX_RX_NDESC || ndesc < VMXNET3_MIN_RX_NDESC)
564                 ndesc = VMXNET3_DEF_RX_NDESC;
565         if (ndesc & VMXNET3_MASK_RX_NDESC)
566                 ndesc &= ~VMXNET3_MASK_RX_NDESC;
567         sc->vmx_nrxdescs = ndesc;
568         sc->vmx_max_rxsegs = VMXNET3_MAX_RX_SEGS;
569 }
570
571 static void
572 vmxnet3_check_multiqueue(struct vmxnet3_softc *sc)
573 {
574
575         if (sc->vmx_intr_type != VMXNET3_IT_MSIX)
576                 goto out;
577
578         /* BMV: Just use the maximum configured for now. */
579         sc->vmx_nrxqueues = sc->vmx_max_nrxqueues;
580         sc->vmx_ntxqueues = sc->vmx_max_ntxqueues;
581
582         if (sc->vmx_nrxqueues > 1)
583                 sc->vmx_flags |= VMXNET3_FLAG_RSS;
584
585         return;
586
587 out:
588         sc->vmx_ntxqueues = 1;
589         sc->vmx_nrxqueues = 1;
590 }
591
592 #ifdef __FreeBSD__
593 static int
594 vmxnet3_alloc_msix_interrupts(struct vmxnet3_softc *sc)
595 {
596         device_t dev;
597         int nmsix, cnt, required;
598
599         dev = sc->vmx_dev;
600
601         if (sc->vmx_flags & VMXNET3_FLAG_NO_MSIX)
602                 return (1);
603
604         /* Allocate an additional vector for the events interrupt. */
605         required = sc->vmx_max_nrxqueues + sc->vmx_max_ntxqueues + 1;
606
607         nmsix = pci_msix_count(dev);
608         if (nmsix < required)
609                 return (1);
610
611         cnt = required;
612         if (pci_alloc_msix(dev, &cnt) == 0 && cnt >= required) {
613                 sc->vmx_nintrs = required;
614                 return (0);
615         } else
616                 pci_release_msi(dev);
617
618         /* BMV TODO Fallback to sharing MSIX vectors if possible. */
619
620         return (1);
621 }
622
623 static int
624 vmxnet3_alloc_msi_interrupts(struct vmxnet3_softc *sc)
625 {
626         device_t dev;
627         int nmsi, cnt, required;
628
629         dev = sc->vmx_dev;
630         required = 1;
631
632         nmsi = pci_msi_count(dev);
633         if (nmsi < required)
634                 return (1);
635
636         cnt = required;
637         if (pci_alloc_msi(dev, &cnt) == 0 && cnt >= required) {
638                 sc->vmx_nintrs = 1;
639                 return (0);
640         } else
641                 pci_release_msi(dev);
642
643         return (1);
644 }
645 #else
646 static int
647 vmxnet3_alloc_msi_interrupts(struct vmxnet3_softc *sc)
648 {
649         int irq_flags, rid;
650         int enable = 1;
651
652         sc->vmx_irq_type = pci_alloc_1intr(sc->vmx_dev, enable, &rid,
653             &irq_flags);
654         sc->vmx_irq_flags = irq_flags;
655         sc->vmx_nintrs = 1;
656         return (0);
657 }
658 #endif
659
660 static int
661 vmxnet3_alloc_legacy_interrupts(struct vmxnet3_softc *sc)
662 {
663
664         sc->vmx_nintrs = 1;
665         return (0);
666 }
667
668 static int
669 vmxnet3_alloc_interrupt(struct vmxnet3_softc *sc, int rid, int flags,
670     struct vmxnet3_interrupt *intr)
671 {
672         struct resource *irq;
673
674         irq = bus_alloc_resource_any(sc->vmx_dev, SYS_RES_IRQ, &rid,
675             sc->vmx_irq_flags);
676         if (irq == NULL)
677                 return (ENXIO);
678
679         intr->vmxi_irq = irq;
680         intr->vmxi_rid = rid;
681
682         return (0);
683 }
684
685 static int
686 vmxnet3_alloc_intr_resources(struct vmxnet3_softc *sc)
687 {
688         int i, rid, flags, error;
689
690         rid = 0;
691         flags = RF_ACTIVE;
692
693         if (sc->vmx_intr_type == VMXNET3_IT_LEGACY)
694                 flags |= RF_SHAREABLE;
695         else
696                 rid = 1;
697
698         for (i = 0; i < sc->vmx_nintrs; i++, rid++) {
699                 error = vmxnet3_alloc_interrupt(sc, rid, flags,
700                     &sc->vmx_intrs[i]);
701                 if (error)
702                         return (error);
703         }
704
705         return (0);
706 }
707
708 #ifdef __FreeBSD__
709 static int
710 vmxnet3_setup_msix_interrupts(struct vmxnet3_softc *sc)
711 {
712         device_t dev;
713         struct vmxnet3_txqueue *txq;
714         struct vmxnet3_rxqueue *rxq;
715         struct vmxnet3_interrupt *intr;
716         int i, error;
717
718         dev = sc->vmx_dev;
719         intr = &sc->vmx_intrs[0];
720
721         for (i = 0; i < sc->vmx_ntxqueues; i++, intr++) {
722                 txq = &sc->vmx_txq[i];
723                 error = bus_setup_intr(dev, intr->vmxi_irq, INTR_MPSAFE,
724                      vmxnet3_txq_intr, txq, &intr->vmxi_handler, NULL);
725                 if (error)
726                         return (error);
727                 bus_describe_intr(dev, intr->vmxi_irq, intr->vmxi_handler,
728                     "tq%d", i);
729                 txq->vxtxq_intr_idx = intr->vmxi_rid - 1;
730         }
731
732         for (i = 0; i < sc->vmx_nrxqueues; i++, intr++) {
733                 rxq = &sc->vmx_rxq[i];
734                 error = bus_setup_intr(dev, intr->vmxi_irq, INTR_MPSAFE,
735                     vmxnet3_rxq_intr, rxq, &intr->vmxi_handler, NULL);
736                 if (error)
737                         return (error);
738                 bus_describe_intr(dev, intr->vmxi_irq, intr->vmxi_handler,
739                     "rq%d", i);
740                 rxq->vxrxq_intr_idx = intr->vmxi_rid - 1;
741         }
742
743         error = bus_setup_intr(dev, intr->vmxi_irq, INTR_MPSAFE,
744             vmxnet3_event_intr, sc, &intr->vmxi_handler, NULL);
745         if (error)
746                 return (error);
747         bus_describe_intr(dev, intr->vmxi_irq, intr->vmxi_handler, "event");
748         sc->vmx_event_intr_idx = intr->vmxi_rid - 1;
749
750         return (0);
751 }
752 #endif
753
754 static int
755 vmxnet3_setup_legacy_interrupt(struct vmxnet3_softc *sc)
756 {
757         struct vmxnet3_interrupt *intr;
758         int i, error;
759
760         intr = &sc->vmx_intrs[0];
761         error = bus_setup_intr(sc->vmx_dev, intr->vmxi_irq,
762             INTR_MPSAFE, vmxnet3_legacy_intr, sc,
763             &intr->vmxi_handler, NULL);
764
765         for (i = 0; i < sc->vmx_ntxqueues; i++)
766                 sc->vmx_txq[i].vxtxq_intr_idx = 0;
767         for (i = 0; i < sc->vmx_nrxqueues; i++)
768                 sc->vmx_rxq[i].vxrxq_intr_idx = 0;
769         sc->vmx_event_intr_idx = 0;
770
771         return (error);
772 }
773
774 static void
775 vmxnet3_set_interrupt_idx(struct vmxnet3_softc *sc)
776 {
777         struct vmxnet3_txqueue *txq;
778         struct vmxnet3_txq_shared *txs;
779         struct vmxnet3_rxqueue *rxq;
780         struct vmxnet3_rxq_shared *rxs;
781         int i;
782
783         sc->vmx_ds->evintr = sc->vmx_event_intr_idx;
784
785         for (i = 0; i < sc->vmx_ntxqueues; i++) {
786                 txq = &sc->vmx_txq[i];
787                 txs = txq->vxtxq_ts;
788                 txs->intr_idx = txq->vxtxq_intr_idx;
789         }
790
791         for (i = 0; i < sc->vmx_nrxqueues; i++) {
792                 rxq = &sc->vmx_rxq[i];
793                 rxs = rxq->vxrxq_rs;
794                 rxs->intr_idx = rxq->vxrxq_intr_idx;
795         }
796 }
797
798 static int
799 vmxnet3_setup_interrupts(struct vmxnet3_softc *sc)
800 {
801         int error;
802
803         error = vmxnet3_alloc_intr_resources(sc);
804         if (error)
805                 return (error);
806
807         switch (sc->vmx_intr_type) {
808         case VMXNET3_IT_MSIX:
809 #ifdef __FreeBSD__
810                 error = vmxnet3_setup_msix_interrupts(sc);
811 #else
812                 device_printf(sc->vmx_dev, "VMXNET3_IT_MSIX unsupported\n");
813                 error = ENXIO;
814 #endif
815                 break;
816         case VMXNET3_IT_MSI:
817         case VMXNET3_IT_LEGACY:
818                 error = vmxnet3_setup_legacy_interrupt(sc);
819                 break;
820         default:
821                 panic("%s: invalid interrupt type %d", __func__,
822                     sc->vmx_intr_type);
823         }
824
825         if (error == 0)
826                 vmxnet3_set_interrupt_idx(sc);
827
828         return (error);
829 }
830
831 #ifdef __FreeBSD__
832 static int
833 vmxnet3_alloc_interrupts(struct vmxnet3_softc *sc)
834 {
835         device_t dev;
836         uint32_t config;
837         int error;
838
839         dev = sc->vmx_dev;
840         config = vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_INTRCFG);
841
842         sc->vmx_intr_type = config & 0x03;
843         sc->vmx_intr_mask_mode = (config >> 2) & 0x03;
844
845         switch (sc->vmx_intr_type) {
846         case VMXNET3_IT_AUTO:
847                 sc->vmx_intr_type = VMXNET3_IT_MSIX;
848                 /* FALLTHROUGH */
849         case VMXNET3_IT_MSIX:
850                 error = vmxnet3_alloc_msix_interrupts(sc);
851                 if (error == 0)
852                         break;
853                 sc->vmx_intr_type = VMXNET3_IT_MSI;
854                 /* FALLTHROUGH */
855         case VMXNET3_IT_MSI:
856                 error = vmxnet3_alloc_msi_interrupts(sc);
857                 if (error == 0)
858                         break;
859                 sc->vmx_intr_type = VMXNET3_IT_LEGACY;
860                 /* FALLTHROUGH */
861         case VMXNET3_IT_LEGACY:
862                 error = vmxnet3_alloc_legacy_interrupts(sc);
863                 if (error == 0)
864                         break;
865                 /* FALLTHROUGH */
866         default:
867                 sc->vmx_intr_type = -1;
868                 device_printf(dev, "cannot allocate any interrupt resources\n");
869                 return (ENXIO);
870         }
871
872         return (error);
873 }
874 #else
875 static int
876 vmxnet3_alloc_interrupts(struct vmxnet3_softc *sc)
877 {
878         device_t dev;
879         uint32_t config;
880         int error;
881
882         dev = sc->vmx_dev;
883         config = vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_INTRCFG);
884
885         sc->vmx_intr_type = config & 0x03;
886         sc->vmx_intr_mask_mode = (config >> 2) & 0x03;
887
888         switch (sc->vmx_intr_type) {
889         case VMXNET3_IT_AUTO:
890                 sc->vmx_intr_type = VMXNET3_IT_MSI;
891                 /* FALLTHROUGH */
892         case VMXNET3_IT_MSI:
893                 error = vmxnet3_alloc_msi_interrupts(sc);
894                 if (error == 0)
895                         break;
896                 sc->vmx_intr_type = VMXNET3_IT_LEGACY;
897         case VMXNET3_IT_LEGACY:
898                 error = vmxnet3_alloc_legacy_interrupts(sc);
899                 if (error == 0)
900                         break;
901                 /* FALLTHROUGH */
902         case VMXNET3_IT_MSIX:
903                 /* FALLTHROUGH */
904         default:
905                 sc->vmx_intr_type = -1;
906                 device_printf(dev, "cannot allocate any interrupt resources\n");
907                 return (ENXIO);
908         }
909
910         return (error);
911 }
912 #endif
913
914 static void
915 vmxnet3_free_interrupt(struct vmxnet3_softc *sc,
916     struct vmxnet3_interrupt *intr)
917 {
918         device_t dev;
919
920         dev = sc->vmx_dev;
921
922         if (intr->vmxi_handler != NULL) {
923                 bus_teardown_intr(dev, intr->vmxi_irq, intr->vmxi_handler);
924                 intr->vmxi_handler = NULL;
925         }
926
927         if (intr->vmxi_irq != NULL) {
928                 bus_release_resource(dev, SYS_RES_IRQ, intr->vmxi_rid,
929                     intr->vmxi_irq);
930                 intr->vmxi_irq = NULL;
931                 intr->vmxi_rid = -1;
932         }
933 }
934
935 #if ___FreeBSD__
936 static void
937 vmxnet3_free_interrupts(struct vmxnet3_softc *sc)
938 {
939         int i;
940
941         for (i = 0; i < sc->vmx_nintrs; i++)
942                 vmxnet3_free_interrupt(sc, &sc->vmx_intrs[i]);
943
944         if (sc->vmx_intr_type == VMXNET3_IT_MSI ||
945             sc->vmx_intr_type == VMXNET3_IT_MSIX)
946                 pci_release_msi(sc->vmx_dev);
947 }
948 #else
949 static void
950 vmxnet3_free_interrupts(struct vmxnet3_softc *sc)
951 {
952         int i;
953
954         for (i = 0; i < sc->vmx_nintrs; i++)
955                 vmxnet3_free_interrupt(sc, &sc->vmx_intrs[i]);
956
957         if (sc->vmx_irq_type == PCI_INTR_TYPE_MSI)
958                 pci_release_msi(sc->vmx_dev);
959 }
960 #endif
961
962 #ifndef VMXNET3_LEGACY_TX
963 static int
964 vmxnet3_alloc_taskqueue(struct vmxnet3_softc *sc)
965 {
966         device_t dev;
967
968         dev = sc->vmx_dev;
969
970         sc->vmx_tq = taskqueue_create(device_get_nameunit(dev), M_NOWAIT,
971             taskqueue_thread_enqueue, &sc->vmx_tq);
972         if (sc->vmx_tq == NULL)
973                 return (ENOMEM);
974
975         return (0);
976 }
977
978 static void
979 vmxnet3_start_taskqueue(struct vmxnet3_softc *sc)
980 {
981         device_t dev;
982         int nthreads, error;
983
984         dev = sc->vmx_dev;
985
986         /*
987          * The taskqueue is typically not frequently used, so a dedicated
988          * thread for each queue is unnecessary.
989          */
990         nthreads = MAX(1, sc->vmx_ntxqueues / 2);
991
992         /*
993          * Most drivers just ignore the return value - it only fails
994          * with ENOMEM so an error is not likely. It is hard for us
995          * to recover from an error here.
996          */
997         error = taskqueue_start_threads(&sc->vmx_tq, nthreads, PI_NET,
998             "%s taskq", device_get_nameunit(dev));
999         if (error)
1000                 device_printf(dev, "failed to start taskqueue: %d", error);
1001 }
1002
1003 static void
1004 vmxnet3_drain_taskqueue(struct vmxnet3_softc *sc)
1005 {
1006         struct vmxnet3_txqueue *txq;
1007         int i;
1008
1009         if (sc->vmx_tq != NULL) {
1010                 for (i = 0; i < sc->vmx_max_ntxqueues; i++) {
1011                         txq = &sc->vmx_txq[i];
1012                         taskqueue_drain(sc->vmx_tq, &txq->vxtxq_defrtask);
1013                 }
1014         }
1015 }
1016
1017 static void
1018 vmxnet3_free_taskqueue(struct vmxnet3_softc *sc)
1019 {
1020         if (sc->vmx_tq != NULL) {
1021                 taskqueue_free(sc->vmx_tq);
1022                 sc->vmx_tq = NULL;
1023         }
1024 }
1025 #endif
1026
1027 static int
1028 vmxnet3_init_rxq(struct vmxnet3_softc *sc, int q)
1029 {
1030         struct vmxnet3_rxqueue *rxq;
1031         struct vmxnet3_rxring *rxr;
1032         int i;
1033
1034         rxq = &sc->vmx_rxq[q];
1035
1036         ksnprintf(rxq->vxrxq_name, sizeof(rxq->vxrxq_name), "%s-rx%d",
1037             device_get_nameunit(sc->vmx_dev), q);
1038         lockinit(&rxq->vxrxq_lock, rxq->vxrxq_name, 0, 0);
1039
1040         rxq->vxrxq_sc = sc;
1041         rxq->vxrxq_id = q;
1042
1043         for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1044                 rxr = &rxq->vxrxq_cmd_ring[i];
1045                 rxr->vxrxr_rid = i;
1046                 rxr->vxrxr_ndesc = sc->vmx_nrxdescs;
1047                 rxr->vxrxr_rxbuf = kmalloc(rxr->vxrxr_ndesc *
1048                     sizeof(struct vmxnet3_rxbuf), M_DEVBUF, M_INTWAIT | M_ZERO);
1049                 if (rxr->vxrxr_rxbuf == NULL)
1050                         return (ENOMEM);
1051
1052                 rxq->vxrxq_comp_ring.vxcr_ndesc += sc->vmx_nrxdescs;
1053         }
1054
1055         return (0);
1056 }
1057
1058 static int
1059 vmxnet3_init_txq(struct vmxnet3_softc *sc, int q)
1060 {
1061         struct vmxnet3_txqueue *txq;
1062         struct vmxnet3_txring *txr;
1063
1064         txq = &sc->vmx_txq[q];
1065         txr = &txq->vxtxq_cmd_ring;
1066
1067         ksnprintf(txq->vxtxq_name, sizeof(txq->vxtxq_name), "%s-tx%d",
1068             device_get_nameunit(sc->vmx_dev), q);
1069         lockinit(&txq->vxtxq_lock, txq->vxtxq_name, 0, 0);
1070
1071         txq->vxtxq_sc = sc;
1072         txq->vxtxq_id = q;
1073
1074         txr->vxtxr_ndesc = sc->vmx_ntxdescs;
1075         txr->vxtxr_txbuf = kmalloc(txr->vxtxr_ndesc *
1076             sizeof(struct vmxnet3_txbuf), M_DEVBUF, M_INTWAIT | M_ZERO);
1077         if (txr->vxtxr_txbuf == NULL)
1078                 return (ENOMEM);
1079
1080         txq->vxtxq_comp_ring.vxcr_ndesc = sc->vmx_ntxdescs;
1081
1082 #ifndef VMXNET3_LEGACY_TX
1083         TASK_INIT(&txq->vxtxq_defrtask, 0, vmxnet3_txq_tq_deferred, txq);
1084
1085         txq->vxtxq_br = buf_ring_alloc(VMXNET3_DEF_BUFRING_SIZE, M_DEVBUF,
1086             M_NOWAIT, &txq->vxtxq_lock);
1087         if (txq->vxtxq_br == NULL)
1088                 return (ENOMEM);
1089 #endif
1090
1091         return (0);
1092 }
1093
1094 static int
1095 vmxnet3_alloc_rxtx_queues(struct vmxnet3_softc *sc)
1096 {
1097         int i, error;
1098
1099         /*
1100          * Only attempt to create multiple queues if MSIX is available. MSIX is
1101          * disabled by default because its apparently broken for devices passed
1102          * through by at least ESXi 5.1. The hw.pci.honor_msi_blacklist tunable
1103          * must be set to zero for MSIX. This check prevents us from allocating
1104          * queue structures that we will not use.
1105          */
1106         if (sc->vmx_flags & VMXNET3_FLAG_NO_MSIX) {
1107                 sc->vmx_max_nrxqueues = 1;
1108                 sc->vmx_max_ntxqueues = 1;
1109         }
1110
1111         sc->vmx_rxq = kmalloc(sizeof(struct vmxnet3_rxqueue) *
1112             sc->vmx_max_nrxqueues, M_DEVBUF, M_INTWAIT | M_ZERO);
1113         sc->vmx_txq = kmalloc(sizeof(struct vmxnet3_txqueue) *
1114             sc->vmx_max_ntxqueues, M_DEVBUF, M_INTWAIT | M_ZERO);
1115         if (sc->vmx_rxq == NULL || sc->vmx_txq == NULL)
1116                 return (ENOMEM);
1117
1118         for (i = 0; i < sc->vmx_max_nrxqueues; i++) {
1119                 error = vmxnet3_init_rxq(sc, i);
1120                 if (error)
1121                         return (error);
1122         }
1123
1124         for (i = 0; i < sc->vmx_max_ntxqueues; i++) {
1125                 error = vmxnet3_init_txq(sc, i);
1126                 if (error)
1127                         return (error);
1128         }
1129
1130         return (0);
1131 }
1132
1133 static void
1134 vmxnet3_destroy_rxq(struct vmxnet3_rxqueue *rxq)
1135 {
1136         struct vmxnet3_rxring *rxr;
1137         int i;
1138
1139         rxq->vxrxq_sc = NULL;
1140         rxq->vxrxq_id = -1;
1141
1142         for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1143                 rxr = &rxq->vxrxq_cmd_ring[i];
1144
1145                 if (rxr->vxrxr_rxbuf != NULL) {
1146                         kfree(rxr->vxrxr_rxbuf, M_DEVBUF);
1147                         rxr->vxrxr_rxbuf = NULL;
1148                 }
1149         }
1150
1151 #if 0 /* XXX */
1152         if (mtx_initialized(&rxq->vxrxq_lock) != 0)
1153 #endif
1154                 lockuninit(&rxq->vxrxq_lock);
1155 }
1156
1157 static void
1158 vmxnet3_destroy_txq(struct vmxnet3_txqueue *txq)
1159 {
1160         struct vmxnet3_txring *txr;
1161
1162         txr = &txq->vxtxq_cmd_ring;
1163
1164         txq->vxtxq_sc = NULL;
1165         txq->vxtxq_id = -1;
1166
1167 #ifndef VMXNET3_LEGACY_TX
1168         if (txq->vxtxq_br != NULL) {
1169                 buf_ring_free(txq->vxtxq_br, M_DEVBUF);
1170                 txq->vxtxq_br = NULL;
1171         }
1172 #endif
1173
1174         if (txr->vxtxr_txbuf != NULL) {
1175                 kfree(txr->vxtxr_txbuf, M_DEVBUF);
1176                 txr->vxtxr_txbuf = NULL;
1177         }
1178
1179 #if 0 /* XXX */
1180         if (mtx_initialized(&txq->vxtxq_lock) != 0)
1181 #endif
1182                 lockuninit(&txq->vxtxq_lock);
1183 }
1184
1185 static void
1186 vmxnet3_free_rxtx_queues(struct vmxnet3_softc *sc)
1187 {
1188         int i;
1189
1190         if (sc->vmx_rxq != NULL) {
1191                 for (i = 0; i < sc->vmx_max_nrxqueues; i++)
1192                         vmxnet3_destroy_rxq(&sc->vmx_rxq[i]);
1193                 kfree(sc->vmx_rxq, M_DEVBUF);
1194                 sc->vmx_rxq = NULL;
1195         }
1196
1197         if (sc->vmx_txq != NULL) {
1198                 for (i = 0; i < sc->vmx_max_ntxqueues; i++)
1199                         vmxnet3_destroy_txq(&sc->vmx_txq[i]);
1200                 kfree(sc->vmx_txq, M_DEVBUF);
1201                 sc->vmx_txq = NULL;
1202         }
1203 }
1204
1205 static int
1206 vmxnet3_alloc_shared_data(struct vmxnet3_softc *sc)
1207 {
1208         device_t dev;
1209         uint8_t *kva;
1210         size_t size;
1211         int i, error;
1212
1213         dev = sc->vmx_dev;
1214
1215         size = sizeof(struct vmxnet3_driver_shared);
1216         error = vmxnet3_dma_malloc(sc, size, 1, &sc->vmx_ds_dma);
1217         if (error) {
1218                 device_printf(dev, "cannot alloc shared memory\n");
1219                 return (error);
1220         }
1221         sc->vmx_ds = (struct vmxnet3_driver_shared *) sc->vmx_ds_dma.dma_vaddr;
1222
1223         size = sc->vmx_ntxqueues * sizeof(struct vmxnet3_txq_shared) +
1224             sc->vmx_nrxqueues * sizeof(struct vmxnet3_rxq_shared);
1225         error = vmxnet3_dma_malloc(sc, size, 128, &sc->vmx_qs_dma);
1226         if (error) {
1227                 device_printf(dev, "cannot alloc queue shared memory\n");
1228                 return (error);
1229         }
1230         sc->vmx_qs = (void *) sc->vmx_qs_dma.dma_vaddr;
1231         kva = sc->vmx_qs;
1232
1233         for (i = 0; i < sc->vmx_ntxqueues; i++) {
1234                 sc->vmx_txq[i].vxtxq_ts = (struct vmxnet3_txq_shared *) kva;
1235                 kva += sizeof(struct vmxnet3_txq_shared);
1236         }
1237         for (i = 0; i < sc->vmx_nrxqueues; i++) {
1238                 sc->vmx_rxq[i].vxrxq_rs = (struct vmxnet3_rxq_shared *) kva;
1239                 kva += sizeof(struct vmxnet3_rxq_shared);
1240         }
1241
1242         if (sc->vmx_flags & VMXNET3_FLAG_RSS) {
1243                 size = sizeof(struct vmxnet3_rss_shared);
1244                 error = vmxnet3_dma_malloc(sc, size, 128, &sc->vmx_rss_dma);
1245                 if (error) {
1246                         device_printf(dev, "cannot alloc rss shared memory\n");
1247                         return (error);
1248                 }
1249                 sc->vmx_rss =
1250                     (struct vmxnet3_rss_shared *) sc->vmx_rss_dma.dma_vaddr;
1251         }
1252
1253         return (0);
1254 }
1255
1256 static void
1257 vmxnet3_free_shared_data(struct vmxnet3_softc *sc)
1258 {
1259
1260         if (sc->vmx_rss != NULL) {
1261                 vmxnet3_dma_free(sc, &sc->vmx_rss_dma);
1262                 sc->vmx_rss = NULL;
1263         }
1264
1265         if (sc->vmx_qs != NULL) {
1266                 vmxnet3_dma_free(sc, &sc->vmx_qs_dma);
1267                 sc->vmx_qs = NULL;
1268         }
1269
1270         if (sc->vmx_ds != NULL) {
1271                 vmxnet3_dma_free(sc, &sc->vmx_ds_dma);
1272                 sc->vmx_ds = NULL;
1273         }
1274 }
1275
1276 static int
1277 vmxnet3_alloc_txq_data(struct vmxnet3_softc *sc)
1278 {
1279         device_t dev;
1280         struct vmxnet3_txqueue *txq;
1281         struct vmxnet3_txring *txr;
1282         struct vmxnet3_comp_ring *txc;
1283         size_t descsz, compsz;
1284         int i, q, error;
1285
1286         dev = sc->vmx_dev;
1287
1288         for (q = 0; q < sc->vmx_ntxqueues; q++) {
1289                 txq = &sc->vmx_txq[q];
1290                 txr = &txq->vxtxq_cmd_ring;
1291                 txc = &txq->vxtxq_comp_ring;
1292
1293                 descsz = txr->vxtxr_ndesc * sizeof(struct vmxnet3_txdesc);
1294                 compsz = txr->vxtxr_ndesc * sizeof(struct vmxnet3_txcompdesc);
1295
1296                 error = bus_dma_tag_create(bus_get_dma_tag(dev),
1297                     1, 0,                       /* alignment, boundary */
1298                     BUS_SPACE_MAXADDR,          /* lowaddr */
1299                     BUS_SPACE_MAXADDR,          /* highaddr */
1300                     NULL, NULL,                 /* filter, filterarg */
1301                     VMXNET3_TX_MAXSIZE,         /* maxsize */
1302                     VMXNET3_TX_MAXSEGS,         /* nsegments */
1303                     VMXNET3_TX_MAXSEGSIZE,      /* maxsegsize */
1304                     0,                          /* flags */
1305                     &txr->vxtxr_txtag);
1306                 if (error) {
1307                         device_printf(dev,
1308                             "unable to create Tx buffer tag for queue %d\n", q);
1309                         return (error);
1310                 }
1311
1312                 error = vmxnet3_dma_malloc(sc, descsz, 512, &txr->vxtxr_dma);
1313                 if (error) {
1314                         device_printf(dev, "cannot alloc Tx descriptors for "
1315                             "queue %d error %d\n", q, error);
1316                         return (error);
1317                 }
1318                 txr->vxtxr_txd =
1319                     (struct vmxnet3_txdesc *) txr->vxtxr_dma.dma_vaddr;
1320
1321                 error = vmxnet3_dma_malloc(sc, compsz, 512, &txc->vxcr_dma);
1322                 if (error) {
1323                         device_printf(dev, "cannot alloc Tx comp descriptors "
1324                            "for queue %d error %d\n", q, error);
1325                         return (error);
1326                 }
1327                 txc->vxcr_u.txcd =
1328                     (struct vmxnet3_txcompdesc *) txc->vxcr_dma.dma_vaddr;
1329
1330                 for (i = 0; i < txr->vxtxr_ndesc; i++) {
1331                         error = bus_dmamap_create(txr->vxtxr_txtag, 0,
1332                             &txr->vxtxr_txbuf[i].vtxb_dmamap);
1333                         if (error) {
1334                                 device_printf(dev, "unable to create Tx buf "
1335                                     "dmamap for queue %d idx %d\n", q, i);
1336                                 return (error);
1337                         }
1338                 }
1339         }
1340
1341         return (0);
1342 }
1343
1344 static void
1345 vmxnet3_free_txq_data(struct vmxnet3_softc *sc)
1346 {
1347         device_t dev;
1348         struct vmxnet3_txqueue *txq;
1349         struct vmxnet3_txring *txr;
1350         struct vmxnet3_comp_ring *txc;
1351         struct vmxnet3_txbuf *txb;
1352         int i, q;
1353
1354         dev = sc->vmx_dev;
1355
1356         for (q = 0; q < sc->vmx_ntxqueues; q++) {
1357                 txq = &sc->vmx_txq[q];
1358                 txr = &txq->vxtxq_cmd_ring;
1359                 txc = &txq->vxtxq_comp_ring;
1360
1361                 for (i = 0; i < txr->vxtxr_ndesc; i++) {
1362                         txb = &txr->vxtxr_txbuf[i];
1363                         if (txb->vtxb_dmamap != NULL) {
1364                                 bus_dmamap_destroy(txr->vxtxr_txtag,
1365                                     txb->vtxb_dmamap);
1366                                 txb->vtxb_dmamap = NULL;
1367                         }
1368                 }
1369
1370                 if (txc->vxcr_u.txcd != NULL) {
1371                         vmxnet3_dma_free(sc, &txc->vxcr_dma);
1372                         txc->vxcr_u.txcd = NULL;
1373                 }
1374
1375                 if (txr->vxtxr_txd != NULL) {
1376                         vmxnet3_dma_free(sc, &txr->vxtxr_dma);
1377                         txr->vxtxr_txd = NULL;
1378                 }
1379
1380                 if (txr->vxtxr_txtag != NULL) {
1381                         bus_dma_tag_destroy(txr->vxtxr_txtag);
1382                         txr->vxtxr_txtag = NULL;
1383                 }
1384         }
1385 }
1386
1387 static int
1388 vmxnet3_alloc_rxq_data(struct vmxnet3_softc *sc)
1389 {
1390         device_t dev;
1391         struct vmxnet3_rxqueue *rxq;
1392         struct vmxnet3_rxring *rxr;
1393         struct vmxnet3_comp_ring *rxc;
1394         int descsz, compsz;
1395         int i, j, q, error;
1396
1397         dev = sc->vmx_dev;
1398
1399         for (q = 0; q < sc->vmx_nrxqueues; q++) {
1400                 rxq = &sc->vmx_rxq[q];
1401                 rxc = &rxq->vxrxq_comp_ring;
1402                 compsz = 0;
1403
1404                 for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1405                         rxr = &rxq->vxrxq_cmd_ring[i];
1406
1407                         descsz = rxr->vxrxr_ndesc *
1408                             sizeof(struct vmxnet3_rxdesc);
1409                         compsz += rxr->vxrxr_ndesc *
1410                             sizeof(struct vmxnet3_rxcompdesc);
1411
1412                         error = bus_dma_tag_create(bus_get_dma_tag(dev),
1413                             1, 0,               /* alignment, boundary */
1414                             BUS_SPACE_MAXADDR,  /* lowaddr */
1415                             BUS_SPACE_MAXADDR,  /* highaddr */
1416                             NULL, NULL,         /* filter, filterarg */
1417                             MJUMPAGESIZE,       /* maxsize */
1418                             1,                  /* nsegments */
1419                             MJUMPAGESIZE,       /* maxsegsize */
1420                             0,                  /* flags */
1421                             &rxr->vxrxr_rxtag);
1422                         if (error) {
1423                                 device_printf(dev,
1424                                     "unable to create Rx buffer tag for "
1425                                     "queue %d\n", q);
1426                                 return (error);
1427                         }
1428
1429                         error = vmxnet3_dma_malloc(sc, descsz, 512,
1430                             &rxr->vxrxr_dma);
1431                         if (error) {
1432                                 device_printf(dev, "cannot allocate Rx "
1433                                     "descriptors for queue %d/%d error %d\n",
1434                                     i, q, error);
1435                                 return (error);
1436                         }
1437                         rxr->vxrxr_rxd =
1438                             (struct vmxnet3_rxdesc *) rxr->vxrxr_dma.dma_vaddr;
1439                 }
1440
1441                 error = vmxnet3_dma_malloc(sc, compsz, 512, &rxc->vxcr_dma);
1442                 if (error) {
1443                         device_printf(dev, "cannot alloc Rx comp descriptors "
1444                             "for queue %d error %d\n", q, error);
1445                         return (error);
1446                 }
1447                 rxc->vxcr_u.rxcd =
1448                     (struct vmxnet3_rxcompdesc *) rxc->vxcr_dma.dma_vaddr;
1449
1450                 for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1451                         rxr = &rxq->vxrxq_cmd_ring[i];
1452
1453                         error = bus_dmamap_create(rxr->vxrxr_rxtag, 0,
1454                             &rxr->vxrxr_spare_dmap);
1455                         if (error) {
1456                                 device_printf(dev, "unable to create spare "
1457                                     "dmamap for queue %d/%d error %d\n",
1458                                     q, i, error);
1459                                 return (error);
1460                         }
1461
1462                         for (j = 0; j < rxr->vxrxr_ndesc; j++) {
1463                                 error = bus_dmamap_create(rxr->vxrxr_rxtag, 0,
1464                                     &rxr->vxrxr_rxbuf[j].vrxb_dmamap);
1465                                 if (error) {
1466                                         device_printf(dev, "unable to create "
1467                                             "dmamap for queue %d/%d slot %d "
1468                                             "error %d\n",
1469                                             q, i, j, error);
1470                                         return (error);
1471                                 }
1472                         }
1473                 }
1474         }
1475
1476         return (0);
1477 }
1478
1479 static void
1480 vmxnet3_free_rxq_data(struct vmxnet3_softc *sc)
1481 {
1482         device_t dev;
1483         struct vmxnet3_rxqueue *rxq;
1484         struct vmxnet3_rxring *rxr;
1485         struct vmxnet3_comp_ring *rxc;
1486         struct vmxnet3_rxbuf *rxb;
1487         int i, j, q;
1488
1489         dev = sc->vmx_dev;
1490
1491         for (q = 0; q < sc->vmx_nrxqueues; q++) {
1492                 rxq = &sc->vmx_rxq[q];
1493                 rxc = &rxq->vxrxq_comp_ring;
1494
1495                 for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1496                         rxr = &rxq->vxrxq_cmd_ring[i];
1497
1498                         if (rxr->vxrxr_spare_dmap != NULL) {
1499                                 bus_dmamap_destroy(rxr->vxrxr_rxtag,
1500                                     rxr->vxrxr_spare_dmap);
1501                                 rxr->vxrxr_spare_dmap = NULL;
1502                         }
1503
1504                         for (j = 0; j < rxr->vxrxr_ndesc; j++) {
1505                                 rxb = &rxr->vxrxr_rxbuf[j];
1506                                 if (rxb->vrxb_dmamap != NULL) {
1507                                         bus_dmamap_destroy(rxr->vxrxr_rxtag,
1508                                             rxb->vrxb_dmamap);
1509                                         rxb->vrxb_dmamap = NULL;
1510                                 }
1511                         }
1512                 }
1513
1514                 if (rxc->vxcr_u.rxcd != NULL) {
1515                         vmxnet3_dma_free(sc, &rxc->vxcr_dma);
1516                         rxc->vxcr_u.rxcd = NULL;
1517                 }
1518
1519                 for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
1520                         rxr = &rxq->vxrxq_cmd_ring[i];
1521
1522                         if (rxr->vxrxr_rxd != NULL) {
1523                                 vmxnet3_dma_free(sc, &rxr->vxrxr_dma);
1524                                 rxr->vxrxr_rxd = NULL;
1525                         }
1526
1527                         if (rxr->vxrxr_rxtag != NULL) {
1528                                 bus_dma_tag_destroy(rxr->vxrxr_rxtag);
1529                                 rxr->vxrxr_rxtag = NULL;
1530                         }
1531                 }
1532         }
1533 }
1534
1535 static int
1536 vmxnet3_alloc_queue_data(struct vmxnet3_softc *sc)
1537 {
1538         int error;
1539
1540         error = vmxnet3_alloc_txq_data(sc);
1541         if (error)
1542                 return (error);
1543
1544         error = vmxnet3_alloc_rxq_data(sc);
1545         if (error)
1546                 return (error);
1547
1548         return (0);
1549 }
1550
1551 static void
1552 vmxnet3_free_queue_data(struct vmxnet3_softc *sc)
1553 {
1554
1555         if (sc->vmx_rxq != NULL)
1556                 vmxnet3_free_rxq_data(sc);
1557
1558         if (sc->vmx_txq != NULL)
1559                 vmxnet3_free_txq_data(sc);
1560 }
1561
1562 static int
1563 vmxnet3_alloc_mcast_table(struct vmxnet3_softc *sc)
1564 {
1565         int error;
1566
1567         error = vmxnet3_dma_malloc(sc, VMXNET3_MULTICAST_MAX * ETHER_ADDR_LEN,
1568             32, &sc->vmx_mcast_dma);
1569         if (error)
1570                 device_printf(sc->vmx_dev, "unable to alloc multicast table\n");
1571         else
1572                 sc->vmx_mcast = sc->vmx_mcast_dma.dma_vaddr;
1573
1574         return (error);
1575 }
1576
1577 static void
1578 vmxnet3_free_mcast_table(struct vmxnet3_softc *sc)
1579 {
1580
1581         if (sc->vmx_mcast != NULL) {
1582                 vmxnet3_dma_free(sc, &sc->vmx_mcast_dma);
1583                 sc->vmx_mcast = NULL;
1584         }
1585 }
1586
1587 static void
1588 vmxnet3_init_shared_data(struct vmxnet3_softc *sc)
1589 {
1590         struct vmxnet3_driver_shared *ds;
1591         struct vmxnet3_txqueue *txq;
1592         struct vmxnet3_txq_shared *txs;
1593         struct vmxnet3_rxqueue *rxq;
1594         struct vmxnet3_rxq_shared *rxs;
1595         int i;
1596
1597         ds = sc->vmx_ds;
1598
1599         /*
1600          * Initialize fields of the shared data that remains the same across
1601          * reinits. Note the shared data is zero'd when allocated.
1602          */
1603
1604         ds->magic = VMXNET3_REV1_MAGIC;
1605
1606         /* DriverInfo */
1607         ds->version = VMXNET3_DRIVER_VERSION;
1608         ds->guest = VMXNET3_GOS_FREEBSD |
1609 #ifdef __LP64__
1610             VMXNET3_GOS_64BIT;
1611 #else
1612             VMXNET3_GOS_32BIT;
1613 #endif
1614         ds->vmxnet3_revision = 1;
1615         ds->upt_version = 1;
1616
1617         /* Misc. conf */
1618         ds->driver_data = vtophys(sc);
1619         ds->driver_data_len = sizeof(struct vmxnet3_softc);
1620         ds->queue_shared = sc->vmx_qs_dma.dma_paddr;
1621         ds->queue_shared_len = sc->vmx_qs_dma.dma_size;
1622         ds->nrxsg_max = sc->vmx_max_rxsegs;
1623
1624         /* RSS conf */
1625         if (sc->vmx_flags & VMXNET3_FLAG_RSS) {
1626                 ds->rss.version = 1;
1627                 ds->rss.paddr = sc->vmx_rss_dma.dma_paddr;
1628                 ds->rss.len = sc->vmx_rss_dma.dma_size;
1629         }
1630
1631         /* Interrupt control. */
1632         ds->automask = sc->vmx_intr_mask_mode == VMXNET3_IMM_AUTO;
1633         ds->nintr = sc->vmx_nintrs;
1634         ds->evintr = sc->vmx_event_intr_idx;
1635         ds->ictrl = VMXNET3_ICTRL_DISABLE_ALL;
1636
1637         for (i = 0; i < sc->vmx_nintrs; i++)
1638                 ds->modlevel[i] = UPT1_IMOD_ADAPTIVE;
1639
1640         /* Receive filter. */
1641         ds->mcast_table = sc->vmx_mcast_dma.dma_paddr;
1642         ds->mcast_tablelen = sc->vmx_mcast_dma.dma_size;
1643
1644         /* Tx queues */
1645         for (i = 0; i < sc->vmx_ntxqueues; i++) {
1646                 txq = &sc->vmx_txq[i];
1647                 txs = txq->vxtxq_ts;
1648
1649                 txs->cmd_ring = txq->vxtxq_cmd_ring.vxtxr_dma.dma_paddr;
1650                 txs->cmd_ring_len = txq->vxtxq_cmd_ring.vxtxr_ndesc;
1651                 txs->comp_ring = txq->vxtxq_comp_ring.vxcr_dma.dma_paddr;
1652                 txs->comp_ring_len = txq->vxtxq_comp_ring.vxcr_ndesc;
1653                 txs->driver_data = vtophys(txq);
1654                 txs->driver_data_len = sizeof(struct vmxnet3_txqueue);
1655         }
1656
1657         /* Rx queues */
1658         for (i = 0; i < sc->vmx_nrxqueues; i++) {
1659                 rxq = &sc->vmx_rxq[i];
1660                 rxs = rxq->vxrxq_rs;
1661
1662                 rxs->cmd_ring[0] = rxq->vxrxq_cmd_ring[0].vxrxr_dma.dma_paddr;
1663                 rxs->cmd_ring_len[0] = rxq->vxrxq_cmd_ring[0].vxrxr_ndesc;
1664                 rxs->cmd_ring[1] = rxq->vxrxq_cmd_ring[1].vxrxr_dma.dma_paddr;
1665                 rxs->cmd_ring_len[1] = rxq->vxrxq_cmd_ring[1].vxrxr_ndesc;
1666                 rxs->comp_ring = rxq->vxrxq_comp_ring.vxcr_dma.dma_paddr;
1667                 rxs->comp_ring_len = rxq->vxrxq_comp_ring.vxcr_ndesc;
1668                 rxs->driver_data = vtophys(rxq);
1669                 rxs->driver_data_len = sizeof(struct vmxnet3_rxqueue);
1670         }
1671 }
1672
1673 static void
1674 vmxnet3_init_hwassist(struct vmxnet3_softc *sc)
1675 {
1676         struct ifnet *ifp = sc->vmx_ifp;
1677         uint64_t hwassist;
1678
1679         hwassist = 0;
1680         if (ifp->if_capenable & IFCAP_TXCSUM)
1681                 hwassist |= VMXNET3_CSUM_OFFLOAD;
1682         if (ifp->if_capenable & IFCAP_TXCSUM_IPV6)
1683                 hwassist |= VMXNET3_CSUM_OFFLOAD_IPV6;
1684 #if 0 /* XXX TSO */
1685         if (ifp->if_capenable & IFCAP_TSO4)
1686                 hwassist |= CSUM_IP_TSO;
1687         if (ifp->if_capenable & IFCAP_TSO6)
1688                 hwassist |= CSUM_IP6_TSO;
1689 #endif
1690         ifp->if_hwassist = hwassist;
1691 }
1692
1693 static void
1694 vmxnet3_reinit_interface(struct vmxnet3_softc *sc)
1695 {
1696         struct ifnet *ifp;
1697
1698         ifp = sc->vmx_ifp;
1699
1700         /* Use the current MAC address. */
1701         bcopy(IF_LLADDR(sc->vmx_ifp), sc->vmx_lladdr, ETHER_ADDR_LEN);
1702         vmxnet3_set_lladdr(sc);
1703
1704         vmxnet3_init_hwassist(sc);
1705 }
1706
1707 static void
1708 vmxnet3_reinit_rss_shared_data(struct vmxnet3_softc *sc)
1709 {
1710         /*
1711          * Use the same key as the Linux driver until FreeBSD can do
1712          * RSS (presumably Toeplitz) in software.
1713          */
1714         static const uint8_t rss_key[UPT1_RSS_MAX_KEY_SIZE] = {
1715             0x3b, 0x56, 0xd1, 0x56, 0x13, 0x4a, 0xe7, 0xac,
1716             0xe8, 0x79, 0x09, 0x75, 0xe8, 0x65, 0x79, 0x28,
1717             0x35, 0x12, 0xb9, 0x56, 0x7c, 0x76, 0x4b, 0x70,
1718             0xd8, 0x56, 0xa3, 0x18, 0x9b, 0x0a, 0xee, 0xf3,
1719             0x96, 0xa6, 0x9f, 0x8f, 0x9e, 0x8c, 0x90, 0xc9,
1720         };
1721
1722         struct vmxnet3_driver_shared *ds;
1723         struct vmxnet3_rss_shared *rss;
1724         int i;
1725
1726         ds = sc->vmx_ds;
1727         rss = sc->vmx_rss;
1728
1729         rss->hash_type =
1730             UPT1_RSS_HASH_TYPE_IPV4 | UPT1_RSS_HASH_TYPE_TCP_IPV4 |
1731             UPT1_RSS_HASH_TYPE_IPV6 | UPT1_RSS_HASH_TYPE_TCP_IPV6;
1732         rss->hash_func = UPT1_RSS_HASH_FUNC_TOEPLITZ;
1733         rss->hash_key_size = UPT1_RSS_MAX_KEY_SIZE;
1734         rss->ind_table_size = UPT1_RSS_MAX_IND_TABLE_SIZE;
1735         memcpy(rss->hash_key, rss_key, UPT1_RSS_MAX_KEY_SIZE);
1736
1737         for (i = 0; i < UPT1_RSS_MAX_IND_TABLE_SIZE; i++)
1738                 rss->ind_table[i] = i % sc->vmx_nrxqueues;
1739 }
1740
1741 static void
1742 vmxnet3_reinit_shared_data(struct vmxnet3_softc *sc)
1743 {
1744         struct ifnet *ifp;
1745         struct vmxnet3_driver_shared *ds;
1746
1747         ifp = sc->vmx_ifp;
1748         ds = sc->vmx_ds;
1749
1750         ds->mtu = ifp->if_mtu;
1751         ds->ntxqueue = sc->vmx_ntxqueues;
1752         ds->nrxqueue = sc->vmx_nrxqueues;
1753
1754         ds->upt_features = 0;
1755         if (ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6))
1756                 ds->upt_features |= UPT1_F_CSUM;
1757         if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
1758                 ds->upt_features |= UPT1_F_VLAN;
1759 #if 0 /* XXX LRO */
1760         if (ifp->if_capenable & IFCAP_LRO)
1761                 ds->upt_features |= UPT1_F_LRO;
1762 #endif
1763
1764         if (sc->vmx_flags & VMXNET3_FLAG_RSS) {
1765                 ds->upt_features |= UPT1_F_RSS;
1766                 vmxnet3_reinit_rss_shared_data(sc);
1767         }
1768
1769         vmxnet3_write_bar1(sc, VMXNET3_BAR1_DSL, sc->vmx_ds_dma.dma_paddr);
1770         vmxnet3_write_bar1(sc, VMXNET3_BAR1_DSH,
1771             (uint64_t) sc->vmx_ds_dma.dma_paddr >> 32);
1772 }
1773
1774 static int
1775 vmxnet3_alloc_data(struct vmxnet3_softc *sc)
1776 {
1777         int error;
1778
1779         error = vmxnet3_alloc_shared_data(sc);
1780         if (error)
1781                 return (error);
1782
1783         error = vmxnet3_alloc_queue_data(sc);
1784         if (error)
1785                 return (error);
1786
1787         error = vmxnet3_alloc_mcast_table(sc);
1788         if (error)
1789                 return (error);
1790
1791         vmxnet3_init_shared_data(sc);
1792
1793         return (0);
1794 }
1795
1796 static void
1797 vmxnet3_free_data(struct vmxnet3_softc *sc)
1798 {
1799
1800         vmxnet3_free_mcast_table(sc);
1801         vmxnet3_free_queue_data(sc);
1802         vmxnet3_free_shared_data(sc);
1803 }
1804
1805 static int
1806 vmxnet3_setup_interface(struct vmxnet3_softc *sc)
1807 {
1808         device_t dev;
1809         struct ifnet *ifp;
1810
1811         dev = sc->vmx_dev;
1812
1813         ifp = sc->vmx_ifp = if_alloc(IFT_ETHER);
1814         if (ifp == NULL) {
1815                 device_printf(dev, "cannot allocate ifnet structure\n");
1816                 return (ENOSPC);
1817         }
1818
1819         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1820         ifp->if_baudrate = IF_Gbps(10ULL);
1821         ifp->if_softc = sc;
1822         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
1823         ifp->if_init = vmxnet3_init;
1824         ifp->if_ioctl = vmxnet3_ioctl;
1825 #if 0 /* XXX TSO */
1826         ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
1827         ifp->if_hw_tsomaxsegcount = VMXNET3_TX_MAXSEGS;
1828         ifp->if_hw_tsomaxsegsize = VMXNET3_TX_MAXSEGSIZE;
1829 #endif
1830
1831 #ifdef VMXNET3_LEGACY_TX
1832         ifp->if_start = vmxnet3_start;
1833         ifq_set_maxlen(&ifp->if_snd, sc->vmx_ntxdescs - 1);
1834         ifq_set_ready(&ifp->if_snd);
1835 #else
1836         ifp->if_transmit = vmxnet3_txq_mq_start;
1837         ifp->if_qflush = vmxnet3_qflush;
1838 #endif
1839
1840         vmxnet3_get_lladdr(sc);
1841         ether_ifattach(ifp, sc->vmx_lladdr, NULL);
1842
1843         ifp->if_capabilities |= IFCAP_RXCSUM | IFCAP_TXCSUM;
1844         ifp->if_capabilities |= IFCAP_RXCSUM_IPV6 | IFCAP_TXCSUM_IPV6;
1845 #if 0 /* XXX TSO */
1846         ifp->if_capabilities |= IFCAP_TSO4 | IFCAP_TSO6;
1847 #endif
1848         ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING |
1849             IFCAP_VLAN_HWCSUM;
1850         ifp->if_capenable = ifp->if_capabilities;
1851
1852 #if 0 /* XXX LRO / VLAN_HWFILTER */
1853         /* These capabilities are not enabled by default. */
1854         ifp->if_capabilities |= /* IFCAP_LRO | */ IFCAP_VLAN_HWFILTER;
1855 #endif
1856
1857         sc->vmx_vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
1858             vmxnet3_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
1859         sc->vmx_vlan_detach = EVENTHANDLER_REGISTER(vlan_config,
1860             vmxnet3_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
1861
1862         ifmedia_init(&sc->vmx_media, 0, vmxnet3_media_change,
1863             vmxnet3_media_status);
1864         ifmedia_add(&sc->vmx_media, IFM_ETHER | IFM_AUTO, 0, NULL);
1865         ifmedia_set(&sc->vmx_media, IFM_ETHER | IFM_AUTO);
1866
1867         return (0);
1868 }
1869
1870 static void
1871 vmxnet3_evintr(struct vmxnet3_softc *sc)
1872 {
1873         device_t dev;
1874         struct ifnet *ifp;
1875         struct vmxnet3_txq_shared *ts;
1876         struct vmxnet3_rxq_shared *rs;
1877         uint32_t event;
1878         int reset;
1879
1880         dev = sc->vmx_dev;
1881         ifp = sc->vmx_ifp;
1882         reset = 0;
1883
1884         VMXNET3_CORE_LOCK(sc);
1885
1886         /* Clear events. */
1887         event = sc->vmx_ds->event;
1888         vmxnet3_write_bar1(sc, VMXNET3_BAR1_EVENT, event);
1889
1890         if (event & VMXNET3_EVENT_LINK) {
1891                 vmxnet3_link_status(sc);
1892                 if (sc->vmx_link_active != 0)
1893                         vmxnet3_tx_start_all(sc);
1894         }
1895
1896         if (event & (VMXNET3_EVENT_TQERROR | VMXNET3_EVENT_RQERROR)) {
1897                 reset = 1;
1898                 vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_STATUS);
1899                 ts = sc->vmx_txq[0].vxtxq_ts;
1900                 if (ts->stopped != 0)
1901                         device_printf(dev, "Tx queue error %#x\n", ts->error);
1902                 rs = sc->vmx_rxq[0].vxrxq_rs;
1903                 if (rs->stopped != 0)
1904                         device_printf(dev, "Rx queue error %#x\n", rs->error);
1905                 device_printf(dev, "Rx/Tx queue error event ... resetting\n");
1906         }
1907
1908         if (event & VMXNET3_EVENT_DIC)
1909                 device_printf(dev, "device implementation change event\n");
1910         if (event & VMXNET3_EVENT_DEBUG)
1911                 device_printf(dev, "debug event\n");
1912
1913         if (reset != 0) {
1914                 ifp->if_flags &= ~IFF_RUNNING;
1915                 vmxnet3_init_locked(sc);
1916         }
1917
1918         VMXNET3_CORE_UNLOCK(sc);
1919 }
1920
1921 static void
1922 vmxnet3_txq_eof(struct vmxnet3_txqueue *txq)
1923 {
1924         struct vmxnet3_softc *sc;
1925         struct ifnet *ifp;
1926         struct vmxnet3_txring *txr;
1927         struct vmxnet3_comp_ring *txc;
1928         struct vmxnet3_txcompdesc *txcd;
1929         struct vmxnet3_txbuf *txb;
1930         struct mbuf *m;
1931         u_int sop;
1932
1933         sc = txq->vxtxq_sc;
1934         ifp = sc->vmx_ifp;
1935         txr = &txq->vxtxq_cmd_ring;
1936         txc = &txq->vxtxq_comp_ring;
1937
1938         VMXNET3_TXQ_LOCK_ASSERT(txq);
1939
1940         for (;;) {
1941                 txcd = &txc->vxcr_u.txcd[txc->vxcr_next];
1942                 if (txcd->gen != txc->vxcr_gen)
1943                         break;
1944                 vmxnet3_barrier(sc, VMXNET3_BARRIER_RD);
1945
1946                 if (++txc->vxcr_next == txc->vxcr_ndesc) {
1947                         txc->vxcr_next = 0;
1948                         txc->vxcr_gen ^= 1;
1949                 }
1950
1951                 sop = txr->vxtxr_next;
1952                 txb = &txr->vxtxr_txbuf[sop];
1953
1954                 if ((m = txb->vtxb_m) != NULL) {
1955                         bus_dmamap_sync(txr->vxtxr_txtag, txb->vtxb_dmamap,
1956                             BUS_DMASYNC_POSTWRITE);
1957                         bus_dmamap_unload(txr->vxtxr_txtag, txb->vtxb_dmamap);
1958
1959                         txq->vxtxq_stats.vmtxs_opackets++;
1960                         txq->vxtxq_stats.vmtxs_obytes += m->m_pkthdr.len;
1961                         if (m->m_flags & M_MCAST)
1962                                 txq->vxtxq_stats.vmtxs_omcasts++;
1963
1964                         m_freem(m);
1965                         txb->vtxb_m = NULL;
1966                 }
1967
1968                 txr->vxtxr_next = (txcd->eop_idx + 1) % txr->vxtxr_ndesc;
1969         }
1970
1971         if (txr->vxtxr_head == txr->vxtxr_next)
1972                 txq->vxtxq_watchdog = 0;
1973 }
1974
1975 static int
1976 vmxnet3_newbuf(struct vmxnet3_softc *sc, struct vmxnet3_rxring *rxr)
1977 {
1978         struct ifnet *ifp;
1979         struct mbuf *m;
1980         struct vmxnet3_rxdesc *rxd;
1981         struct vmxnet3_rxbuf *rxb;
1982         bus_dma_tag_t tag;
1983         bus_dmamap_t dmap;
1984         bus_dma_segment_t segs[1];
1985         int idx, clsize, btype, flags, nsegs, error;
1986
1987         ifp = sc->vmx_ifp;
1988         tag = rxr->vxrxr_rxtag;
1989         dmap = rxr->vxrxr_spare_dmap;
1990         idx = rxr->vxrxr_fill;
1991         rxd = &rxr->vxrxr_rxd[idx];
1992         rxb = &rxr->vxrxr_rxbuf[idx];
1993
1994 #ifdef VMXNET3_FAILPOINTS
1995         KFAIL_POINT_CODE(VMXNET3_FP, newbuf, return ENOBUFS);
1996         if (rxr->vxrxr_rid != 0)
1997                 KFAIL_POINT_CODE(VMXNET3_FP, newbuf_body_only, return ENOBUFS);
1998 #endif
1999
2000         if (rxr->vxrxr_rid == 0 && (idx % sc->vmx_rx_max_chain) == 0) {
2001                 flags = M_PKTHDR;
2002                 clsize = MCLBYTES;
2003                 btype = VMXNET3_BTYPE_HEAD;
2004         } else {
2005 #if __FreeBSD_version < 902001
2006                 /*
2007                  * These mbufs will never be used for the start of a frame.
2008                  * Roughly prior to branching releng/9.2, the load_mbuf_sg()
2009                  * required the mbuf to always be a packet header. Avoid
2010                  * unnecessary mbuf initialization in newer versions where
2011                  * that is not the case.
2012                  */
2013                 flags = M_PKTHDR;
2014 #else
2015                 flags = 0;
2016 #endif
2017                 clsize = MJUMPAGESIZE;
2018                 btype = VMXNET3_BTYPE_BODY;
2019         }
2020
2021         m = m_getjcl(M_NOWAIT, MT_DATA, flags, clsize);
2022         if (m == NULL) {
2023                 sc->vmx_stats.vmst_mgetcl_failed++;
2024                 return (ENOBUFS);
2025         }
2026
2027         if (btype == VMXNET3_BTYPE_HEAD) {
2028                 m->m_len = m->m_pkthdr.len = clsize;
2029                 m_adj(m, ETHER_ALIGN);
2030         } else
2031                 m->m_len = clsize;
2032
2033         error = bus_dmamap_load_mbuf_segment(tag, dmap, m, &segs[0], 1, &nsegs,
2034             BUS_DMA_NOWAIT);
2035         if (error) {
2036                 m_freem(m);
2037                 sc->vmx_stats.vmst_mbuf_load_failed++;
2038                 return (error);
2039         }
2040         KASSERT(nsegs == 1,
2041             ("%s: mbuf %p with too many segments %d", __func__, m, nsegs));
2042 #if __FreeBSD_version < 902001
2043         if (btype == VMXNET3_BTYPE_BODY)
2044                 m->m_flags &= ~M_PKTHDR;
2045 #endif
2046
2047         if (rxb->vrxb_m != NULL) {
2048                 bus_dmamap_sync(tag, rxb->vrxb_dmamap, BUS_DMASYNC_POSTREAD);
2049                 bus_dmamap_unload(tag, rxb->vrxb_dmamap);
2050         }
2051
2052         rxr->vxrxr_spare_dmap = rxb->vrxb_dmamap;
2053         rxb->vrxb_dmamap = dmap;
2054         rxb->vrxb_m = m;
2055
2056         rxd->addr = segs[0].ds_addr;
2057         rxd->len = segs[0].ds_len;
2058         rxd->btype = btype;
2059         rxd->gen = rxr->vxrxr_gen;
2060
2061         vmxnet3_rxr_increment_fill(rxr);
2062         return (0);
2063 }
2064
2065 static void
2066 vmxnet3_rxq_eof_discard(struct vmxnet3_rxqueue *rxq,
2067     struct vmxnet3_rxring *rxr, int idx)
2068 {
2069         struct vmxnet3_rxdesc *rxd;
2070
2071         rxd = &rxr->vxrxr_rxd[idx];
2072         rxd->gen = rxr->vxrxr_gen;
2073         vmxnet3_rxr_increment_fill(rxr);
2074 }
2075
2076 static void
2077 vmxnet3_rxq_discard_chain(struct vmxnet3_rxqueue *rxq)
2078 {
2079         struct vmxnet3_softc *sc;
2080         struct vmxnet3_rxring *rxr;
2081         struct vmxnet3_comp_ring *rxc;
2082         struct vmxnet3_rxcompdesc *rxcd;
2083         int idx, eof;
2084
2085         sc = rxq->vxrxq_sc;
2086         rxc = &rxq->vxrxq_comp_ring;
2087
2088         do {
2089                 rxcd = &rxc->vxcr_u.rxcd[rxc->vxcr_next];
2090                 if (rxcd->gen != rxc->vxcr_gen)
2091                         break;          /* Not expected. */
2092                 vmxnet3_barrier(sc, VMXNET3_BARRIER_RD);
2093
2094                 if (++rxc->vxcr_next == rxc->vxcr_ndesc) {
2095                         rxc->vxcr_next = 0;
2096                         rxc->vxcr_gen ^= 1;
2097                 }
2098
2099                 idx = rxcd->rxd_idx;
2100                 eof = rxcd->eop;
2101                 if (rxcd->qid < sc->vmx_nrxqueues)
2102                         rxr = &rxq->vxrxq_cmd_ring[0];
2103                 else
2104                         rxr = &rxq->vxrxq_cmd_ring[1];
2105                 vmxnet3_rxq_eof_discard(rxq, rxr, idx);
2106         } while (!eof);
2107 }
2108
2109 static void
2110 vmxnet3_rx_csum(struct vmxnet3_rxcompdesc *rxcd, struct mbuf *m)
2111 {
2112
2113         if (rxcd->ipv4) {
2114                 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
2115                 if (rxcd->ipcsum_ok)
2116                         m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
2117         }
2118
2119         if (!rxcd->fragment) {
2120                 if (rxcd->csum_ok && (rxcd->tcp || rxcd->udp)) {
2121                         m->m_pkthdr.csum_flags |= CSUM_DATA_VALID |
2122                             CSUM_PSEUDO_HDR;
2123                         m->m_pkthdr.csum_data = 0xFFFF;
2124                 }
2125         }
2126 }
2127
2128 static void
2129 vmxnet3_rxq_input(struct vmxnet3_rxqueue *rxq,
2130     struct vmxnet3_rxcompdesc *rxcd, struct mbuf *m)
2131 {
2132         struct vmxnet3_softc *sc;
2133         struct ifnet *ifp;
2134
2135         sc = rxq->vxrxq_sc;
2136         ifp = sc->vmx_ifp;
2137
2138         if (rxcd->error) {
2139                 rxq->vxrxq_stats.vmrxs_ierrors++;
2140                 m_freem(m);
2141                 return;
2142         }
2143
2144 #if 0
2145 #ifdef notyet
2146         switch (rxcd->rss_type) {
2147         case VMXNET3_RCD_RSS_TYPE_IPV4:
2148                 m->m_pkthdr.flowid = rxcd->rss_hash;
2149                 M_HASHTYPE_SET(m, M_HASHTYPE_RSS_IPV4);
2150                 break;
2151         case VMXNET3_RCD_RSS_TYPE_TCPIPV4:
2152                 m->m_pkthdr.flowid = rxcd->rss_hash;
2153                 M_HASHTYPE_SET(m, M_HASHTYPE_RSS_TCP_IPV4);
2154                 break;
2155         case VMXNET3_RCD_RSS_TYPE_IPV6:
2156                 m->m_pkthdr.flowid = rxcd->rss_hash;
2157                 M_HASHTYPE_SET(m, M_HASHTYPE_RSS_IPV6);
2158                 break;
2159         case VMXNET3_RCD_RSS_TYPE_TCPIPV6:
2160                 m->m_pkthdr.flowid = rxcd->rss_hash;
2161                 M_HASHTYPE_SET(m, M_HASHTYPE_RSS_TCP_IPV6);
2162                 break;
2163         default: /* VMXNET3_RCD_RSS_TYPE_NONE */
2164                 m->m_pkthdr.flowid = rxq->vxrxq_id;
2165                 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
2166                 break;
2167         }
2168 #else
2169         m->m_pkthdr.flowid = rxq->vxrxq_id;
2170         M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
2171 #endif
2172 #endif
2173
2174         if (!rxcd->no_csum)
2175                 vmxnet3_rx_csum(rxcd, m);
2176         if (rxcd->vlan) {
2177                 m->m_flags |= M_VLANTAG;
2178                 m->m_pkthdr.ether_vlantag = rxcd->vtag;
2179         }
2180
2181         rxq->vxrxq_stats.vmrxs_ipackets++;
2182         rxq->vxrxq_stats.vmrxs_ibytes += m->m_pkthdr.len;
2183
2184         VMXNET3_RXQ_UNLOCK(rxq);
2185         (*ifp->if_input)(ifp, m, NULL, -1);
2186         VMXNET3_RXQ_LOCK(rxq);
2187 }
2188
2189 static void
2190 vmxnet3_rxq_eof(struct vmxnet3_rxqueue *rxq)
2191 {
2192         struct vmxnet3_softc *sc;
2193         struct ifnet *ifp;
2194         struct vmxnet3_rxring *rxr;
2195         struct vmxnet3_comp_ring *rxc;
2196         struct vmxnet3_rxdesc *rxd;
2197         struct vmxnet3_rxcompdesc *rxcd;
2198         struct mbuf *m, *m_head, *m_tail;
2199         int idx, length;
2200
2201         sc = rxq->vxrxq_sc;
2202         ifp = sc->vmx_ifp;
2203         rxc = &rxq->vxrxq_comp_ring;
2204
2205         VMXNET3_RXQ_LOCK_ASSERT(rxq);
2206
2207         if ((ifp->if_flags & IFF_RUNNING) == 0)
2208                 return;
2209
2210         m_head = rxq->vxrxq_mhead;
2211         rxq->vxrxq_mhead = NULL;
2212         m_tail = rxq->vxrxq_mtail;
2213         rxq->vxrxq_mtail = NULL;
2214         KKASSERT(m_head == NULL || m_tail != NULL);
2215
2216         for (;;) {
2217                 rxcd = &rxc->vxcr_u.rxcd[rxc->vxcr_next];
2218                 if (rxcd->gen != rxc->vxcr_gen) {
2219                         rxq->vxrxq_mhead = m_head;
2220                         rxq->vxrxq_mtail = m_tail;
2221                         break;
2222                 }
2223                 vmxnet3_barrier(sc, VMXNET3_BARRIER_RD);
2224
2225                 if (++rxc->vxcr_next == rxc->vxcr_ndesc) {
2226                         rxc->vxcr_next = 0;
2227                         rxc->vxcr_gen ^= 1;
2228                 }
2229
2230                 idx = rxcd->rxd_idx;
2231                 length = rxcd->len;
2232                 if (rxcd->qid < sc->vmx_nrxqueues)
2233                         rxr = &rxq->vxrxq_cmd_ring[0];
2234                 else
2235                         rxr = &rxq->vxrxq_cmd_ring[1];
2236                 rxd = &rxr->vxrxr_rxd[idx];
2237
2238                 m = rxr->vxrxr_rxbuf[idx].vrxb_m;
2239                 KASSERT(m != NULL, ("%s: queue %d idx %d without mbuf",
2240                     __func__, rxcd->qid, idx));
2241
2242                 /*
2243                  * The host may skip descriptors. We detect this when this
2244                  * descriptor does not match the previous fill index. Catch
2245                  * up with the host now.
2246                  */
2247                 if (__predict_false(rxr->vxrxr_fill != idx)) {
2248                         while (rxr->vxrxr_fill != idx) {
2249                                 rxr->vxrxr_rxd[rxr->vxrxr_fill].gen =
2250                                     rxr->vxrxr_gen;
2251                                 vmxnet3_rxr_increment_fill(rxr);
2252                         }
2253                 }
2254
2255                 if (rxcd->sop) {
2256                         KASSERT(rxd->btype == VMXNET3_BTYPE_HEAD,
2257                             ("%s: start of frame w/o head buffer", __func__));
2258                         KASSERT(rxr == &rxq->vxrxq_cmd_ring[0],
2259                             ("%s: start of frame not in ring 0", __func__));
2260                         KASSERT((idx % sc->vmx_rx_max_chain) == 0,
2261                             ("%s: start of frame at unexcepted index %d (%d)",
2262                              __func__, idx, sc->vmx_rx_max_chain));
2263                         KASSERT(m_head == NULL,
2264                             ("%s: duplicate start of frame?", __func__));
2265
2266                         if (length == 0) {
2267                                 /* Just ignore this descriptor. */
2268                                 vmxnet3_rxq_eof_discard(rxq, rxr, idx);
2269                                 goto nextp;
2270                         }
2271
2272                         if (vmxnet3_newbuf(sc, rxr) != 0) {
2273                                 rxq->vxrxq_stats.vmrxs_iqdrops++;
2274                                 vmxnet3_rxq_eof_discard(rxq, rxr, idx);
2275                                 if (!rxcd->eop)
2276                                         vmxnet3_rxq_discard_chain(rxq);
2277                                 goto nextp;
2278                         }
2279
2280                         m->m_pkthdr.rcvif = ifp;
2281                         m->m_pkthdr.len = m->m_len = length;
2282                         m->m_pkthdr.csum_flags = 0;
2283                         m_head = m_tail = m;
2284
2285                 } else {
2286                         KASSERT(rxd->btype == VMXNET3_BTYPE_BODY,
2287                             ("%s: non start of frame w/o body buffer", __func__));
2288
2289                         if (m_head == NULL && m_tail == NULL) {
2290                                 /*
2291                                  * This is a continuation of a packet that we
2292                                  * started to drop, but could not drop entirely
2293                                  * because this segment was still owned by the
2294                                  * host.  So, drop the remainder now.
2295                                  */
2296                                 vmxnet3_rxq_eof_discard(rxq, rxr, idx);
2297                                 if (!rxcd->eop)
2298                                         vmxnet3_rxq_discard_chain(rxq);
2299                                 goto nextp;
2300                         }
2301
2302                         KASSERT(m_head != NULL,
2303                             ("%s: frame not started?", __func__));
2304
2305                         if (vmxnet3_newbuf(sc, rxr) != 0) {
2306                                 rxq->vxrxq_stats.vmrxs_iqdrops++;
2307                                 vmxnet3_rxq_eof_discard(rxq, rxr, idx);
2308                                 if (!rxcd->eop)
2309                                         vmxnet3_rxq_discard_chain(rxq);
2310                                 m_freem(m_head);
2311                                 m_head = m_tail = NULL;
2312                                 goto nextp;
2313                         }
2314
2315                         m->m_len = length;
2316                         m_head->m_pkthdr.len += length;
2317                         m_tail->m_next = m;
2318                         m_tail = m;
2319                 }
2320
2321                 if (rxcd->eop) {
2322                         vmxnet3_rxq_input(rxq, rxcd, m_head);
2323                         m_head = m_tail = NULL;
2324
2325                         /* Must recheck after dropping the Rx lock. */
2326                         if ((ifp->if_flags & IFF_RUNNING) == 0)
2327                                 break;
2328                 }
2329
2330 nextp:
2331                 if (__predict_false(rxq->vxrxq_rs->update_rxhead)) {
2332                         int qid = rxcd->qid;
2333                         bus_size_t r;
2334
2335                         idx = (idx + 1) % rxr->vxrxr_ndesc;
2336                         if (qid >= sc->vmx_nrxqueues) {
2337                                 qid -= sc->vmx_nrxqueues;
2338                                 r = VMXNET3_BAR0_RXH2(qid);
2339                         } else
2340                                 r = VMXNET3_BAR0_RXH1(qid);
2341                         vmxnet3_write_bar0(sc, r, idx);
2342                 }
2343         }
2344 }
2345
2346 static void
2347 vmxnet3_legacy_intr(void *xsc)
2348 {
2349         struct vmxnet3_softc *sc;
2350         struct vmxnet3_rxqueue *rxq;
2351         struct vmxnet3_txqueue *txq;
2352
2353         sc = xsc;
2354         rxq = &sc->vmx_rxq[0];
2355         txq = &sc->vmx_txq[0];
2356
2357         if (sc->vmx_intr_type == VMXNET3_IT_LEGACY) {
2358                 if (vmxnet3_read_bar1(sc, VMXNET3_BAR1_INTR) == 0)
2359                         return;
2360         }
2361         if (sc->vmx_intr_mask_mode == VMXNET3_IMM_ACTIVE)
2362                 vmxnet3_disable_all_intrs(sc);
2363
2364         if (sc->vmx_ds->event != 0)
2365                 vmxnet3_evintr(sc);
2366
2367         VMXNET3_RXQ_LOCK(rxq);
2368         vmxnet3_rxq_eof(rxq);
2369         VMXNET3_RXQ_UNLOCK(rxq);
2370
2371         VMXNET3_TXQ_LOCK(txq);
2372         vmxnet3_txq_eof(txq);
2373         vmxnet3_txq_start(txq);
2374         VMXNET3_TXQ_UNLOCK(txq);
2375
2376         vmxnet3_enable_all_intrs(sc);
2377 }
2378
2379 #ifdef __FreeBSD__
2380 static void
2381 vmxnet3_txq_intr(void *xtxq)
2382 {
2383         struct vmxnet3_softc *sc;
2384         struct vmxnet3_txqueue *txq;
2385
2386         txq = xtxq;
2387         sc = txq->vxtxq_sc;
2388
2389         if (sc->vmx_intr_mask_mode == VMXNET3_IMM_ACTIVE)
2390                 vmxnet3_disable_intr(sc, txq->vxtxq_intr_idx);
2391
2392         VMXNET3_TXQ_LOCK(txq);
2393         vmxnet3_txq_eof(txq);
2394         vmxnet3_txq_start(txq);
2395         VMXNET3_TXQ_UNLOCK(txq);
2396
2397         vmxnet3_enable_intr(sc, txq->vxtxq_intr_idx);
2398 }
2399
2400 static void
2401 vmxnet3_rxq_intr(void *xrxq)
2402 {
2403         struct vmxnet3_softc *sc;
2404         struct vmxnet3_rxqueue *rxq;
2405
2406         rxq = xrxq;
2407         sc = rxq->vxrxq_sc;
2408
2409         if (sc->vmx_intr_mask_mode == VMXNET3_IMM_ACTIVE)
2410                 vmxnet3_disable_intr(sc, rxq->vxrxq_intr_idx);
2411
2412         VMXNET3_RXQ_LOCK(rxq);
2413         vmxnet3_rxq_eof(rxq);
2414         VMXNET3_RXQ_UNLOCK(rxq);
2415
2416         vmxnet3_enable_intr(sc, rxq->vxrxq_intr_idx);
2417 }
2418
2419 static void
2420 vmxnet3_event_intr(void *xsc)
2421 {
2422         struct vmxnet3_softc *sc;
2423
2424         sc = xsc;
2425
2426         if (sc->vmx_intr_mask_mode == VMXNET3_IMM_ACTIVE)
2427                 vmxnet3_disable_intr(sc, sc->vmx_event_intr_idx);
2428
2429         if (sc->vmx_ds->event != 0)
2430                 vmxnet3_evintr(sc);
2431
2432         vmxnet3_enable_intr(sc, sc->vmx_event_intr_idx);
2433 }
2434 #endif
2435
2436 static void
2437 vmxnet3_txstop(struct vmxnet3_softc *sc, struct vmxnet3_txqueue *txq)
2438 {
2439         struct vmxnet3_txring *txr;
2440         struct vmxnet3_txbuf *txb;
2441         int i;
2442
2443         txr = &txq->vxtxq_cmd_ring;
2444
2445         for (i = 0; i < txr->vxtxr_ndesc; i++) {
2446                 txb = &txr->vxtxr_txbuf[i];
2447
2448                 if (txb->vtxb_m == NULL)
2449                         continue;
2450
2451                 bus_dmamap_sync(txr->vxtxr_txtag, txb->vtxb_dmamap,
2452                     BUS_DMASYNC_POSTWRITE);
2453                 bus_dmamap_unload(txr->vxtxr_txtag, txb->vtxb_dmamap);
2454                 m_freem(txb->vtxb_m);
2455                 txb->vtxb_m = NULL;
2456         }
2457 }
2458
2459 static void
2460 vmxnet3_rxstop(struct vmxnet3_softc *sc, struct vmxnet3_rxqueue *rxq)
2461 {
2462         struct vmxnet3_rxring *rxr;
2463         struct vmxnet3_rxbuf *rxb;
2464         int i, j;
2465
2466         if (rxq->vxrxq_mhead != NULL) {
2467                 m_freem(rxq->vxrxq_mhead);
2468                 rxq->vxrxq_mhead = NULL;
2469                 rxq->vxrxq_mtail = NULL;
2470         }
2471
2472         for (i = 0; i < VMXNET3_RXRINGS_PERQ; i++) {
2473                 rxr = &rxq->vxrxq_cmd_ring[i];
2474
2475                 for (j = 0; j < rxr->vxrxr_ndesc; j++) {
2476                         rxb = &rxr->vxrxr_rxbuf[j];
2477
2478                         if (rxb->vrxb_m == NULL)
2479                                 continue;
2480
2481                         bus_dmamap_sync(rxr->vxrxr_rxtag, rxb->vrxb_dmamap,
2482                             BUS_DMASYNC_POSTREAD);
2483                         bus_dmamap_unload(rxr->vxrxr_rxtag, rxb->vrxb_dmamap);
2484                         m_freem(rxb->vrxb_m);
2485                         rxb->vrxb_m = NULL;
2486                 }
2487         }
2488 }
2489
2490 static void
2491 vmxnet3_stop_rendezvous(struct vmxnet3_softc *sc)
2492 {
2493         struct vmxnet3_rxqueue *rxq;
2494         struct vmxnet3_txqueue *txq;
2495         int i;
2496
2497         for (i = 0; i < sc->vmx_nrxqueues; i++) {
2498                 rxq = &sc->vmx_rxq[i];
2499                 VMXNET3_RXQ_LOCK(rxq);
2500                 VMXNET3_RXQ_UNLOCK(rxq);
2501         }
2502
2503         for (i = 0; i < sc->vmx_ntxqueues; i++) {
2504                 txq = &sc->vmx_txq[i];
2505                 VMXNET3_TXQ_LOCK(txq);
2506                 VMXNET3_TXQ_UNLOCK(txq);
2507         }
2508 }
2509
2510 static void
2511 vmxnet3_stop(struct vmxnet3_softc *sc)
2512 {
2513         struct ifnet *ifp;
2514         int q;
2515
2516         ifp = sc->vmx_ifp;
2517         VMXNET3_CORE_LOCK_ASSERT(sc);
2518
2519         ifp->if_flags &= ~IFF_RUNNING;
2520         sc->vmx_link_active = 0;
2521         callout_stop(&sc->vmx_tick);
2522
2523         /* Disable interrupts. */
2524         vmxnet3_disable_all_intrs(sc);
2525         vmxnet3_write_cmd(sc, VMXNET3_CMD_DISABLE);
2526
2527         vmxnet3_stop_rendezvous(sc);
2528
2529         for (q = 0; q < sc->vmx_ntxqueues; q++)
2530                 vmxnet3_txstop(sc, &sc->vmx_txq[q]);
2531         for (q = 0; q < sc->vmx_nrxqueues; q++)
2532                 vmxnet3_rxstop(sc, &sc->vmx_rxq[q]);
2533
2534         vmxnet3_write_cmd(sc, VMXNET3_CMD_RESET);
2535 }
2536
2537 static void
2538 vmxnet3_txinit(struct vmxnet3_softc *sc, struct vmxnet3_txqueue *txq)
2539 {
2540         struct vmxnet3_txring *txr;
2541         struct vmxnet3_comp_ring *txc;
2542
2543         txr = &txq->vxtxq_cmd_ring;
2544         txr->vxtxr_head = 0;
2545         txr->vxtxr_next = 0;
2546         txr->vxtxr_gen = VMXNET3_INIT_GEN;
2547         bzero(txr->vxtxr_txd,
2548             txr->vxtxr_ndesc * sizeof(struct vmxnet3_txdesc));
2549
2550         txc = &txq->vxtxq_comp_ring;
2551         txc->vxcr_next = 0;
2552         txc->vxcr_gen = VMXNET3_INIT_GEN;
2553         bzero(txc->vxcr_u.txcd,
2554             txc->vxcr_ndesc * sizeof(struct vmxnet3_txcompdesc));
2555 }
2556
2557 static int
2558 vmxnet3_rxinit(struct vmxnet3_softc *sc, struct vmxnet3_rxqueue *rxq)
2559 {
2560         struct ifnet *ifp;
2561         struct vmxnet3_rxring *rxr;
2562         struct vmxnet3_comp_ring *rxc;
2563         int i, populate, idx, frame_size, error;
2564
2565         ifp = sc->vmx_ifp;
2566         frame_size = ETHER_ALIGN + sizeof(struct ether_vlan_header) +
2567             ifp->if_mtu;
2568
2569         /*
2570          * If the MTU causes us to exceed what a regular sized cluster can
2571          * handle, we allocate a second MJUMPAGESIZE cluster after it in
2572          * ring 0. If in use, ring 1 always contains MJUMPAGESIZE clusters.
2573          *
2574          * Keep rx_max_chain a divisor of the maximum Rx ring size to make
2575          * our life easier. We do not support changing the ring size after
2576          * the attach.
2577          */
2578         if (frame_size <= MCLBYTES)
2579                 sc->vmx_rx_max_chain = 1;
2580         else
2581                 sc->vmx_rx_max_chain = 2;
2582
2583         /*
2584          * Only populate ring 1 if the configuration will take advantage
2585          * of it. That is either when LRO is enabled or the frame size
2586          * exceeds what ring 0 can contain.
2587          */
2588 #if 0 /* XXX LRO */
2589         if ((ifp->if_capenable & IFCAP_LRO) == 0 &&
2590 #else
2591         if (
2592 #endif
2593             frame_size <= MCLBYTES + MJUMPAGESIZE)
2594                 populate = 1;
2595         else
2596                 populate = VMXNET3_RXRINGS_PERQ;
2597
2598         for (i = 0; i < populate; i++) {
2599                 rxr = &rxq->vxrxq_cmd_ring[i];
2600                 rxr->vxrxr_fill = 0;
2601                 rxr->vxrxr_gen = VMXNET3_INIT_GEN;
2602                 bzero(rxr->vxrxr_rxd,
2603                     rxr->vxrxr_ndesc * sizeof(struct vmxnet3_rxdesc));
2604
2605                 for (idx = 0; idx < rxr->vxrxr_ndesc; idx++) {
2606                         error = vmxnet3_newbuf(sc, rxr);
2607                         if (error)
2608                                 return (error);
2609                 }
2610         }
2611
2612         for (/**/; i < VMXNET3_RXRINGS_PERQ; i++) {
2613                 rxr = &rxq->vxrxq_cmd_ring[i];
2614                 rxr->vxrxr_fill = 0;
2615                 rxr->vxrxr_gen = 0;
2616                 bzero(rxr->vxrxr_rxd,
2617                     rxr->vxrxr_ndesc * sizeof(struct vmxnet3_rxdesc));
2618         }
2619
2620         rxc = &rxq->vxrxq_comp_ring;
2621         rxc->vxcr_next = 0;
2622         rxc->vxcr_gen = VMXNET3_INIT_GEN;
2623         bzero(rxc->vxcr_u.rxcd,
2624             rxc->vxcr_ndesc * sizeof(struct vmxnet3_rxcompdesc));
2625
2626         return (0);
2627 }
2628
2629 static int
2630 vmxnet3_reinit_queues(struct vmxnet3_softc *sc)
2631 {
2632         device_t dev;
2633         int q, error;
2634
2635         dev = sc->vmx_dev;
2636
2637         for (q = 0; q < sc->vmx_ntxqueues; q++)
2638                 vmxnet3_txinit(sc, &sc->vmx_txq[q]);
2639
2640         for (q = 0; q < sc->vmx_nrxqueues; q++) {
2641                 error = vmxnet3_rxinit(sc, &sc->vmx_rxq[q]);
2642                 if (error) {
2643                         device_printf(dev, "cannot populate Rx queue %d\n", q);
2644                         return (error);
2645                 }
2646         }
2647
2648         return (0);
2649 }
2650
2651 static int
2652 vmxnet3_enable_device(struct vmxnet3_softc *sc)
2653 {
2654         int q;
2655
2656         if (vmxnet3_read_cmd(sc, VMXNET3_CMD_ENABLE) != 0) {
2657                 device_printf(sc->vmx_dev, "device enable command failed!\n");
2658                 return (1);
2659         }
2660
2661         /* Reset the Rx queue heads. */
2662         for (q = 0; q < sc->vmx_nrxqueues; q++) {
2663                 vmxnet3_write_bar0(sc, VMXNET3_BAR0_RXH1(q), 0);
2664                 vmxnet3_write_bar0(sc, VMXNET3_BAR0_RXH2(q), 0);
2665         }
2666
2667         return (0);
2668 }
2669
2670 static void
2671 vmxnet3_reinit_rxfilters(struct vmxnet3_softc *sc)
2672 {
2673         struct ifnet *ifp;
2674
2675         ifp = sc->vmx_ifp;
2676
2677         vmxnet3_set_rxfilter(sc);
2678
2679 #if 0 /* VLAN_HWFILTER */
2680         if (ifp->if_capenable & IFCAP_VLAN_HWFILTER)
2681                 bcopy(sc->vmx_vlan_filter, sc->vmx_ds->vlan_filter,
2682                     sizeof(sc->vmx_ds->vlan_filter));
2683         else
2684 #endif
2685                 bzero(sc->vmx_ds->vlan_filter,
2686                     sizeof(sc->vmx_ds->vlan_filter));
2687         vmxnet3_write_cmd(sc, VMXNET3_CMD_VLAN_FILTER);
2688 }
2689
2690 static int
2691 vmxnet3_reinit(struct vmxnet3_softc *sc)
2692 {
2693
2694         vmxnet3_reinit_interface(sc);
2695         vmxnet3_reinit_shared_data(sc);
2696
2697         if (vmxnet3_reinit_queues(sc) != 0)
2698                 return (ENXIO);
2699
2700         if (vmxnet3_enable_device(sc) != 0)
2701                 return (ENXIO);
2702
2703         vmxnet3_reinit_rxfilters(sc);
2704
2705         return (0);
2706 }
2707
2708 static void
2709 vmxnet3_init_locked(struct vmxnet3_softc *sc)
2710 {
2711         struct ifnet *ifp;
2712
2713         ifp = sc->vmx_ifp;
2714
2715         if (ifp->if_flags & IFF_RUNNING)
2716                 return;
2717
2718         vmxnet3_stop(sc);
2719
2720         if (vmxnet3_reinit(sc) != 0) {
2721                 vmxnet3_stop(sc);
2722                 return;
2723         }
2724
2725         ifp->if_flags |= IFF_RUNNING;
2726         vmxnet3_link_status(sc);
2727
2728         vmxnet3_enable_all_intrs(sc);
2729         callout_reset(&sc->vmx_tick, hz, vmxnet3_tick, sc);
2730 }
2731
2732 static void
2733 vmxnet3_init(void *xsc)
2734 {
2735         struct vmxnet3_softc *sc;
2736
2737         sc = xsc;
2738
2739         VMXNET3_CORE_LOCK(sc);
2740         vmxnet3_init_locked(sc);
2741         VMXNET3_CORE_UNLOCK(sc);
2742 }
2743
2744 /*
2745  * BMV: Much of this can go away once we finally have offsets in
2746  * the mbuf packet header. Bug andre@.
2747  */
2748 static int
2749 vmxnet3_txq_offload_ctx(struct vmxnet3_txqueue *txq, struct mbuf *m,
2750     int *etype, int *proto, int *start)
2751 {
2752         struct ether_vlan_header *evh;
2753         int offset;
2754 #if defined(INET)
2755         struct ip *ip = NULL;
2756 #endif
2757 #if defined(INET6)
2758         struct ip6_hdr *ip6 = NULL;
2759 #endif
2760
2761         evh = mtod(m, struct ether_vlan_header *);
2762         if (evh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
2763                 /* BMV: We should handle nested VLAN tags too. */
2764                 *etype = ntohs(evh->evl_proto);
2765                 offset = sizeof(struct ether_vlan_header);
2766         } else {
2767                 *etype = ntohs(evh->evl_encap_proto);
2768                 offset = sizeof(struct ether_header);
2769         }
2770
2771         switch (*etype) {
2772 #if defined(INET)
2773         case ETHERTYPE_IP:
2774                 if (__predict_false(m->m_len < offset + sizeof(struct ip))) {
2775                         m = m_pullup(m, offset + sizeof(struct ip));
2776                         if (m == NULL)
2777                                 return (EINVAL);
2778                 }
2779
2780                 ip = (struct ip *)(mtod(m, uint8_t *) + offset);
2781                 *proto = ip->ip_p;
2782                 *start = offset + (ip->ip_hl << 2);
2783                 break;
2784 #endif
2785 #if defined(INET6)
2786         case ETHERTYPE_IPV6:
2787                 if (__predict_false(m->m_len <
2788                     offset + sizeof(struct ip6_hdr))) {
2789                         m = m_pullup(m, offset + sizeof(struct ip6_hdr));
2790                         if (m == NULL)
2791                                 return (EINVAL);
2792                 }
2793
2794                 ip6 = (struct ip6_hdr *)(mtod(m, uint8_t *) + offset);
2795                 *proto = -1;
2796                 *start = ip6_lasthdr(m, offset, IPPROTO_IPV6, proto);
2797                 /* Assert the network stack sent us a valid packet. */
2798                 KASSERT(*start > offset,
2799                     ("%s: mbuf %p start %d offset %d proto %d", __func__, m,
2800                     *start, offset, *proto));
2801                 break;
2802 #endif
2803         default:
2804                 return (EINVAL);
2805         }
2806
2807 #if 0 /* XXX TSO */
2808         if (m->m_pkthdr.csum_flags & CSUM_TSO) {
2809                 struct tcphdr *tcp;
2810
2811                 if (__predict_false(*proto != IPPROTO_TCP)) {
2812                         /* Likely failed to correctly parse the mbuf. */
2813                         return (EINVAL);
2814                 }
2815
2816                 if (m->m_len < *start + sizeof(struct tcphdr)) {
2817                         m = m_pullup(m, *start + sizeof(struct tcphdr));
2818                         if (m == NULL)
2819                                 return (EINVAL);
2820                 }
2821
2822                 tcp = (struct tcphdr *)(mtod(m, uint8_t *) + *start);
2823                 *start += (tcp->th_off << 2);
2824
2825                 txq->vxtxq_stats.vmtxs_tso++;
2826         } else
2827 #endif
2828                 txq->vxtxq_stats.vmtxs_csum++;
2829
2830         return (0);
2831 }
2832
2833 static int
2834 vmxnet3_txq_load_mbuf(struct vmxnet3_txqueue *txq, struct mbuf **m0,
2835     bus_dmamap_t dmap, bus_dma_segment_t segs[], int *nsegs)
2836 {
2837         struct vmxnet3_txring *txr;
2838         struct mbuf *m;
2839         bus_dma_tag_t tag;
2840         int error;
2841
2842         txr = &txq->vxtxq_cmd_ring;
2843         m = *m0;
2844         tag = txr->vxtxr_txtag;
2845
2846         error = bus_dmamap_load_mbuf_segment(tag, dmap, m, segs, 1, nsegs,
2847             BUS_DMA_NOWAIT);
2848         if (error == 0 || error != EFBIG)
2849                 return (error);
2850
2851         m = m_defrag(m, M_NOWAIT);
2852         if (m != NULL) {
2853                 *m0 = m;
2854                 error = bus_dmamap_load_mbuf_segment(tag, dmap, m, segs,
2855                     1, nsegs, BUS_DMA_NOWAIT);
2856         } else
2857                 error = ENOBUFS;
2858
2859         if (error) {
2860                 m_freem(*m0);
2861                 *m0 = NULL;
2862                 txq->vxtxq_sc->vmx_stats.vmst_defrag_failed++;
2863         } else
2864                 txq->vxtxq_sc->vmx_stats.vmst_defragged++;
2865
2866         return (error);
2867 }
2868
2869 static void
2870 vmxnet3_txq_unload_mbuf(struct vmxnet3_txqueue *txq, bus_dmamap_t dmap)
2871 {
2872         struct vmxnet3_txring *txr;
2873
2874         txr = &txq->vxtxq_cmd_ring;
2875         bus_dmamap_unload(txr->vxtxr_txtag, dmap);
2876 }
2877
2878 static int
2879 vmxnet3_txq_encap(struct vmxnet3_txqueue *txq, struct mbuf **m0)
2880 {
2881         struct vmxnet3_softc *sc;
2882         struct vmxnet3_txring *txr;
2883         struct vmxnet3_txdesc *txd, *sop;
2884         struct mbuf *m;
2885         bus_dmamap_t dmap;
2886         bus_dma_segment_t segs[VMXNET3_TX_MAXSEGS];
2887         int i, gen, nsegs, etype, proto, start, error;
2888
2889         sc = txq->vxtxq_sc;
2890         start = 0;
2891         txd = NULL;
2892         txr = &txq->vxtxq_cmd_ring;
2893         dmap = txr->vxtxr_txbuf[txr->vxtxr_head].vtxb_dmamap;
2894
2895         error = vmxnet3_txq_load_mbuf(txq, m0, dmap, segs, &nsegs);
2896         if (error)
2897                 return (error);
2898
2899         m = *m0;
2900         M_ASSERTPKTHDR(m);
2901         KASSERT(nsegs <= VMXNET3_TX_MAXSEGS,
2902             ("%s: mbuf %p with too many segments %d", __func__, m, nsegs));
2903
2904         if (VMXNET3_TXRING_AVAIL(txr) < nsegs) {
2905                 txq->vxtxq_stats.vmtxs_full++;
2906                 vmxnet3_txq_unload_mbuf(txq, dmap);
2907                 return (ENOSPC);
2908         } else if (m->m_pkthdr.csum_flags & VMXNET3_CSUM_ALL_OFFLOAD) {
2909                 error = vmxnet3_txq_offload_ctx(txq, m, &etype, &proto, &start);
2910                 if (error) {
2911                         txq->vxtxq_stats.vmtxs_offload_failed++;
2912                         vmxnet3_txq_unload_mbuf(txq, dmap);
2913                         m_freem(m);
2914                         *m0 = NULL;
2915                         return (error);
2916                 }
2917         }
2918
2919         txr->vxtxr_txbuf[txr->vxtxr_head].vtxb_m = m;
2920         sop = &txr->vxtxr_txd[txr->vxtxr_head];
2921         gen = txr->vxtxr_gen ^ 1;       /* Owned by cpu (yet) */
2922
2923         for (i = 0; i < nsegs; i++) {
2924                 txd = &txr->vxtxr_txd[txr->vxtxr_head];
2925
2926                 txd->addr = segs[i].ds_addr;
2927                 txd->len = segs[i].ds_len;
2928                 txd->gen = gen;
2929                 txd->dtype = 0;
2930                 txd->offload_mode = VMXNET3_OM_NONE;
2931                 txd->offload_pos = 0;
2932                 txd->hlen = 0;
2933                 txd->eop = 0;
2934                 txd->compreq = 0;
2935                 txd->vtag_mode = 0;
2936                 txd->vtag = 0;
2937
2938                 if (++txr->vxtxr_head == txr->vxtxr_ndesc) {
2939                         txr->vxtxr_head = 0;
2940                         txr->vxtxr_gen ^= 1;
2941                 }
2942                 gen = txr->vxtxr_gen;
2943         }
2944         txd->eop = 1;
2945         txd->compreq = 1;
2946
2947         if (m->m_flags & M_VLANTAG) {
2948                 sop->vtag_mode = 1;
2949                 sop->vtag = m->m_pkthdr.ether_vlantag;
2950         }
2951
2952
2953 #if 0 /* XXX TSO */
2954         if (m->m_pkthdr.csum_flags & CSUM_TSO) {
2955                 sop->offload_mode = VMXNET3_OM_TSO;
2956                 sop->hlen = start;
2957                 sop->offload_pos = m->m_pkthdr.tso_segsz;
2958         } else
2959 #endif
2960         if (m->m_pkthdr.csum_flags & (VMXNET3_CSUM_OFFLOAD |
2961             VMXNET3_CSUM_OFFLOAD_IPV6)) {
2962                 sop->offload_mode = VMXNET3_OM_CSUM;
2963                 sop->hlen = start;
2964                 sop->offload_pos = start + m->m_pkthdr.csum_data;
2965         }
2966
2967         /* Finally, change the ownership. */
2968         vmxnet3_barrier(sc, VMXNET3_BARRIER_WR);
2969         sop->gen ^= 1;
2970
2971         txq->vxtxq_ts->npending += nsegs;
2972         if (txq->vxtxq_ts->npending >= txq->vxtxq_ts->intr_threshold) {
2973                 txq->vxtxq_ts->npending = 0;
2974                 vmxnet3_write_bar0(sc, VMXNET3_BAR0_TXH(txq->vxtxq_id),
2975                     txr->vxtxr_head);
2976         }
2977
2978         return (0);
2979 }
2980
2981 #ifdef VMXNET3_LEGACY_TX
2982
2983 static void
2984 vmxnet3_start_locked(struct ifnet *ifp)
2985 {
2986         struct vmxnet3_softc *sc;
2987         struct vmxnet3_txqueue *txq;
2988         struct vmxnet3_txring *txr;
2989         struct mbuf *m_head;
2990         int tx, avail;
2991
2992         sc = ifp->if_softc;
2993         txq = &sc->vmx_txq[0];
2994         txr = &txq->vxtxq_cmd_ring;
2995         tx = 0;
2996
2997         VMXNET3_TXQ_LOCK_ASSERT(txq);
2998
2999         if ((ifp->if_flags & IFF_RUNNING) == 0 ||
3000             sc->vmx_link_active == 0)
3001                 return;
3002
3003         while (!ifq_is_empty(&ifp->if_snd)) {
3004                 if ((avail = VMXNET3_TXRING_AVAIL(txr)) < 2)
3005                         break;
3006
3007                 m_head = ifq_dequeue(&ifp->if_snd);
3008                 if (m_head == NULL)
3009                         break;
3010
3011                 /* Assume worse case if this mbuf is the head of a chain. */
3012                 if (m_head->m_next != NULL && avail < VMXNET3_TX_MAXSEGS) {
3013                         ifq_prepend(&ifp->if_snd, m_head);
3014                         break;
3015                 }
3016
3017                 if (vmxnet3_txq_encap(txq, &m_head) != 0) {
3018                         if (m_head != NULL)
3019                                 ifq_prepend(&ifp->if_snd, m_head);
3020                         break;
3021                 }
3022
3023                 tx++;
3024                 ETHER_BPF_MTAP(ifp, m_head);
3025         }
3026
3027         if (tx > 0)
3028                 txq->vxtxq_watchdog = VMXNET3_WATCHDOG_TIMEOUT;
3029 }
3030
3031 static void
3032 vmxnet3_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
3033 {
3034         struct vmxnet3_softc *sc;
3035         struct vmxnet3_txqueue *txq;
3036
3037         sc = ifp->if_softc;
3038         txq = &sc->vmx_txq[0];
3039
3040         VMXNET3_TXQ_LOCK(txq);
3041         vmxnet3_start_locked(ifp);
3042         VMXNET3_TXQ_UNLOCK(txq);
3043 }
3044
3045 #else /* !VMXNET3_LEGACY_TX */
3046
3047 static int
3048 vmxnet3_txq_mq_start_locked(struct vmxnet3_txqueue *txq, struct mbuf *m)
3049 {
3050         struct vmxnet3_softc *sc;
3051         struct vmxnet3_txring *txr;
3052         struct buf_ring *br;
3053         struct ifnet *ifp;
3054         int tx, avail, error;
3055
3056         sc = txq->vxtxq_sc;
3057         br = txq->vxtxq_br;
3058         ifp = sc->vmx_ifp;
3059         txr = &txq->vxtxq_cmd_ring;
3060         tx = 0;
3061         error = 0;
3062
3063         VMXNET3_TXQ_LOCK_ASSERT(txq);
3064
3065         if ((ifp->if_flags & IFF_RUNNING) == 0 ||
3066             sc->vmx_link_active == 0) {
3067                 if (m != NULL)
3068                         error = drbr_enqueue(ifp, br, m);
3069                 return (error);
3070         }
3071
3072         if (m != NULL) {
3073                 error = drbr_enqueue(ifp, br, m);
3074                 if (error)
3075                         return (error);
3076         }
3077
3078         while ((avail = VMXNET3_TXRING_AVAIL(txr)) >= 2) {
3079                 m = drbr_peek(ifp, br);
3080                 if (m == NULL)
3081                         break;
3082
3083                 /* Assume worse case if this mbuf is the head of a chain. */
3084                 if (m->m_next != NULL && avail < VMXNET3_TX_MAXSEGS) {
3085                         drbr_putback(ifp, br, m);
3086                         break;
3087                 }
3088
3089                 if (vmxnet3_txq_encap(txq, &m) != 0) {
3090                         if (m != NULL)
3091                                 drbr_putback(ifp, br, m);
3092                         else
3093                                 drbr_advance(ifp, br);
3094                         break;
3095                 }
3096                 drbr_advance(ifp, br);
3097
3098                 tx++;
3099                 ETHER_BPF_MTAP(ifp, m);
3100         }
3101
3102         if (tx > 0)
3103                 txq->vxtxq_watchdog = VMXNET3_WATCHDOG_TIMEOUT;
3104
3105         return (0);
3106 }
3107
3108 static int
3109 vmxnet3_txq_mq_start(struct ifnet *ifp, struct mbuf *m)
3110 {
3111         struct vmxnet3_softc *sc;
3112         struct vmxnet3_txqueue *txq;
3113         int i, ntxq, error;
3114
3115         sc = ifp->if_softc;
3116         ntxq = sc->vmx_ntxqueues;
3117
3118         /* check if flowid is set */
3119         if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
3120                 i = m->m_pkthdr.flowid % ntxq;
3121         else
3122                 i = curcpu % ntxq;
3123
3124         txq = &sc->vmx_txq[i];
3125
3126         if (VMXNET3_TXQ_TRYLOCK(txq) != 0) {
3127                 error = vmxnet3_txq_mq_start_locked(txq, m);
3128                 VMXNET3_TXQ_UNLOCK(txq);
3129         } else {
3130                 error = drbr_enqueue(ifp, txq->vxtxq_br, m);
3131                 taskqueue_enqueue(sc->vmx_tq, &txq->vxtxq_defrtask);
3132         }
3133
3134         return (error);
3135 }
3136
3137 static void
3138 vmxnet3_txq_tq_deferred(void *xtxq, int pending)
3139 {
3140         struct vmxnet3_softc *sc;
3141         struct vmxnet3_txqueue *txq;
3142
3143         txq = xtxq;
3144         sc = txq->vxtxq_sc;
3145
3146         VMXNET3_TXQ_LOCK(txq);
3147         if (!drbr_empty(sc->vmx_ifp, txq->vxtxq_br))
3148                 vmxnet3_txq_mq_start_locked(txq, NULL);
3149         VMXNET3_TXQ_UNLOCK(txq);
3150 }
3151
3152 #endif /* VMXNET3_LEGACY_TX */
3153
3154 static void
3155 vmxnet3_txq_start(struct vmxnet3_txqueue *txq)
3156 {
3157         struct vmxnet3_softc *sc;
3158         struct ifnet *ifp;
3159
3160         sc = txq->vxtxq_sc;
3161         ifp = sc->vmx_ifp;
3162
3163 #ifdef VMXNET3_LEGACY_TX
3164         if (!ifq_is_empty(&ifp->if_snd))
3165                 vmxnet3_start_locked(ifp);
3166 #else
3167         if (!drbr_empty(ifp, txq->vxtxq_br))
3168                 vmxnet3_txq_mq_start_locked(txq, NULL);
3169 #endif
3170 }
3171
3172 static void
3173 vmxnet3_tx_start_all(struct vmxnet3_softc *sc)
3174 {
3175         struct vmxnet3_txqueue *txq;
3176         int i;
3177
3178         VMXNET3_CORE_LOCK_ASSERT(sc);
3179
3180         for (i = 0; i < sc->vmx_ntxqueues; i++) {
3181                 txq = &sc->vmx_txq[i];
3182
3183                 VMXNET3_TXQ_LOCK(txq);
3184                 vmxnet3_txq_start(txq);
3185                 VMXNET3_TXQ_UNLOCK(txq);
3186         }
3187 }
3188
3189 static void
3190 vmxnet3_update_vlan_filter(struct vmxnet3_softc *sc, int add, uint16_t tag)
3191 {
3192         struct ifnet *ifp;
3193         int idx, bit;
3194
3195         ifp = sc->vmx_ifp;
3196         idx = (tag >> 5) & 0x7F;
3197         bit = tag & 0x1F;
3198
3199         if (tag == 0 || tag > 4095)
3200                 return;
3201
3202         VMXNET3_CORE_LOCK(sc);
3203
3204         /* Update our private VLAN bitvector. */
3205         if (add)
3206                 sc->vmx_vlan_filter[idx] |= (1 << bit);
3207         else
3208                 sc->vmx_vlan_filter[idx] &= ~(1 << bit);
3209
3210 #if 0 /* VLAN_HWFILTER */
3211         if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) {
3212                 if (add)
3213                         sc->vmx_ds->vlan_filter[idx] |= (1 << bit);
3214                 else
3215                         sc->vmx_ds->vlan_filter[idx] &= ~(1 << bit);
3216                 vmxnet3_write_cmd(sc, VMXNET3_CMD_VLAN_FILTER);
3217         }
3218 #endif
3219
3220         VMXNET3_CORE_UNLOCK(sc);
3221 }
3222
3223 static void
3224 vmxnet3_register_vlan(void *arg, struct ifnet *ifp, uint16_t tag)
3225 {
3226
3227         if (ifp->if_softc == arg)
3228                 vmxnet3_update_vlan_filter(arg, 1, tag);
3229 }
3230
3231 static void
3232 vmxnet3_unregister_vlan(void *arg, struct ifnet *ifp, uint16_t tag)
3233 {
3234
3235         if (ifp->if_softc == arg)
3236                 vmxnet3_update_vlan_filter(arg, 0, tag);
3237 }
3238
3239 static void
3240 vmxnet3_set_rxfilter(struct vmxnet3_softc *sc)
3241 {
3242         struct ifnet *ifp;
3243         struct vmxnet3_driver_shared *ds;
3244         struct ifmultiaddr *ifma;
3245         u_int mode;
3246
3247         ifp = sc->vmx_ifp;
3248         ds = sc->vmx_ds;
3249
3250         mode = VMXNET3_RXMODE_UCAST | VMXNET3_RXMODE_BCAST;
3251         if (ifp->if_flags & IFF_PROMISC)
3252                 mode |= VMXNET3_RXMODE_PROMISC;
3253         if (ifp->if_flags & IFF_ALLMULTI)
3254                 mode |= VMXNET3_RXMODE_ALLMULTI;
3255         else {
3256                 int cnt = 0, overflow = 0;
3257
3258                 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3259                         if (ifma->ifma_addr->sa_family != AF_LINK)
3260                                 continue;
3261                         else if (cnt == VMXNET3_MULTICAST_MAX) {
3262                                 overflow = 1;
3263                                 break;
3264                         }
3265
3266                         bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
3267                            &sc->vmx_mcast[cnt*ETHER_ADDR_LEN], ETHER_ADDR_LEN);
3268                         cnt++;
3269                 }
3270
3271                 if (overflow != 0) {
3272                         cnt = 0;
3273                         mode |= VMXNET3_RXMODE_ALLMULTI;
3274                 } else if (cnt > 0)
3275                         mode |= VMXNET3_RXMODE_MCAST;
3276                 ds->mcast_tablelen = cnt * ETHER_ADDR_LEN;
3277         }
3278
3279         ds->rxmode = mode;
3280
3281         vmxnet3_write_cmd(sc, VMXNET3_CMD_SET_FILTER);
3282         vmxnet3_write_cmd(sc, VMXNET3_CMD_SET_RXMODE);
3283 }
3284
3285 static int
3286 vmxnet3_change_mtu(struct vmxnet3_softc *sc, int mtu)
3287 {
3288         struct ifnet *ifp;
3289
3290         ifp = sc->vmx_ifp;
3291
3292         if (mtu < VMXNET3_MIN_MTU || mtu > VMXNET3_MAX_MTU)
3293                 return (EINVAL);
3294
3295         ifp->if_mtu = mtu;
3296
3297         if (ifp->if_flags & IFF_RUNNING) {
3298                 ifp->if_flags &= ~IFF_RUNNING;
3299                 vmxnet3_init_locked(sc);
3300         }
3301
3302         return (0);
3303 }
3304
3305 static int
3306 vmxnet3_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cred)
3307 {
3308         struct vmxnet3_softc *sc;
3309         struct ifreq *ifr;
3310         int reinit, mask, error;
3311
3312         sc = ifp->if_softc;
3313         ifr = (struct ifreq *) data;
3314         error = 0;
3315
3316         switch (cmd) {
3317         case SIOCSIFMTU:
3318                 if (ifp->if_mtu != ifr->ifr_mtu) {
3319                         VMXNET3_CORE_LOCK(sc);
3320                         error = vmxnet3_change_mtu(sc, ifr->ifr_mtu);
3321                         VMXNET3_CORE_UNLOCK(sc);
3322                 }
3323                 break;
3324
3325         case SIOCSIFFLAGS:
3326                 VMXNET3_CORE_LOCK(sc);
3327                 if (ifp->if_flags & IFF_UP) {
3328                         if ((ifp->if_flags & IFF_RUNNING)) {
3329                                 if ((ifp->if_flags ^ sc->vmx_if_flags) &
3330                                     (IFF_PROMISC | IFF_ALLMULTI)) {
3331                                         vmxnet3_set_rxfilter(sc);
3332                                 }
3333                         } else
3334                                 vmxnet3_init_locked(sc);
3335                 } else {
3336                         if (ifp->if_flags & IFF_RUNNING)
3337                                 vmxnet3_stop(sc);
3338                 }
3339                 sc->vmx_if_flags = ifp->if_flags;
3340                 VMXNET3_CORE_UNLOCK(sc);
3341                 break;
3342
3343         case SIOCADDMULTI:
3344         case SIOCDELMULTI:
3345                 VMXNET3_CORE_LOCK(sc);
3346                 if (ifp->if_flags & IFF_RUNNING)
3347                         vmxnet3_set_rxfilter(sc);
3348                 VMXNET3_CORE_UNLOCK(sc);
3349                 break;
3350
3351         case SIOCSIFMEDIA:
3352         case SIOCGIFMEDIA:
3353                 error = ifmedia_ioctl(ifp, ifr, &sc->vmx_media, cmd);
3354                 break;
3355
3356         case SIOCSIFCAP:
3357                 VMXNET3_CORE_LOCK(sc);
3358                 mask = ifr->ifr_reqcap ^ ifp->if_capenable;
3359
3360                 if (mask & IFCAP_TXCSUM)
3361                         ifp->if_capenable ^= IFCAP_TXCSUM;
3362                 if (mask & IFCAP_TXCSUM_IPV6)
3363                         ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;
3364 #if 0 /* XXX TSO */
3365                 if (mask & IFCAP_TSO4)
3366                         ifp->if_capenable ^= IFCAP_TSO4;
3367                 if (mask & IFCAP_TSO6)
3368                         ifp->if_capenable ^= IFCAP_TSO6;
3369 #endif
3370
3371                 if (mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | /* IFCAP_LRO | */
3372                     IFCAP_VLAN_HWTAGGING /* | IFCAP_VLAN_HWFILTER */)) {
3373                         /* Changing these features requires us to reinit. */
3374                         reinit = 1;
3375
3376                         if (mask & IFCAP_RXCSUM)
3377                                 ifp->if_capenable ^= IFCAP_RXCSUM;
3378                         if (mask & IFCAP_RXCSUM_IPV6)
3379                                 ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;
3380 #if 0 /* XXX LRO */
3381                         if (mask & IFCAP_LRO)
3382                                 ifp->if_capenable ^= IFCAP_LRO;
3383 #endif
3384                         if (mask & IFCAP_VLAN_HWTAGGING)
3385                                 ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
3386 #if 0 /* XXX VLAN_HWFILTER */
3387                         if (mask & IFCAP_VLAN_HWFILTER)
3388                                 ifp->if_capenable ^= IFCAP_VLAN_HWFILTER;
3389 #endif
3390                 } else
3391                         reinit = 0;
3392
3393 #if 0 /* XXX TSO */
3394                 if (mask & IFCAP_VLAN_HWTSO)
3395                         ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
3396 #endif
3397
3398                 if (reinit && (ifp->if_flags & IFF_RUNNING)) {
3399                         ifp->if_flags &= ~IFF_RUNNING;
3400                         vmxnet3_init_locked(sc);
3401                 } else {
3402                         vmxnet3_init_hwassist(sc);
3403                 }
3404
3405                 VMXNET3_CORE_UNLOCK(sc);
3406 #if 0 /* XXX */
3407                 VLAN_CAPABILITIES(ifp);
3408 #endif
3409                 break;
3410
3411         default:
3412                 error = ether_ioctl(ifp, cmd, data);
3413                 break;
3414         }
3415
3416         VMXNET3_CORE_LOCK_ASSERT_NOTOWNED(sc);
3417
3418         return (error);
3419 }
3420
3421 #ifndef VMXNET3_LEGACY_TX
3422 static void
3423 vmxnet3_qflush(struct ifnet *ifp)
3424 {
3425         struct vmxnet3_softc *sc;
3426         struct vmxnet3_txqueue *txq;
3427         struct mbuf *m;
3428         int i;
3429
3430         sc = ifp->if_softc;
3431
3432         for (i = 0; i < sc->vmx_ntxqueues; i++) {
3433                 txq = &sc->vmx_txq[i];
3434
3435                 VMXNET3_TXQ_LOCK(txq);
3436                 while ((m = buf_ring_dequeue_sc(txq->vxtxq_br)) != NULL)
3437                         m_freem(m);
3438                 VMXNET3_TXQ_UNLOCK(txq);
3439         }
3440
3441         if_qflush(ifp);
3442 }
3443 #endif
3444
3445 static int
3446 vmxnet3_watchdog(struct vmxnet3_txqueue *txq)
3447 {
3448         struct vmxnet3_softc *sc;
3449
3450         sc = txq->vxtxq_sc;
3451
3452         VMXNET3_TXQ_LOCK(txq);
3453         if (txq->vxtxq_watchdog == 0 || --txq->vxtxq_watchdog) {
3454                 VMXNET3_TXQ_UNLOCK(txq);
3455                 return (0);
3456         }
3457         VMXNET3_TXQ_UNLOCK(txq);
3458
3459         if_printf(sc->vmx_ifp, "watchdog timeout on queue %d\n",
3460             txq->vxtxq_id);
3461         return (1);
3462 }
3463
3464 static void
3465 vmxnet3_refresh_host_stats(struct vmxnet3_softc *sc)
3466 {
3467
3468         vmxnet3_write_cmd(sc, VMXNET3_CMD_GET_STATS);
3469 }
3470
3471 static void
3472 vmxnet3_txq_accum_stats(struct vmxnet3_txqueue *txq,
3473     struct vmxnet3_txq_stats *accum)
3474 {
3475         struct vmxnet3_txq_stats *st;
3476
3477         st = &txq->vxtxq_stats;
3478
3479         accum->vmtxs_opackets += st->vmtxs_opackets;
3480         accum->vmtxs_obytes += st->vmtxs_obytes;
3481         accum->vmtxs_omcasts += st->vmtxs_omcasts;
3482         accum->vmtxs_csum += st->vmtxs_csum;
3483         accum->vmtxs_tso += st->vmtxs_tso;
3484         accum->vmtxs_full += st->vmtxs_full;
3485         accum->vmtxs_offload_failed += st->vmtxs_offload_failed;
3486 }
3487
3488 static void
3489 vmxnet3_rxq_accum_stats(struct vmxnet3_rxqueue *rxq,
3490     struct vmxnet3_rxq_stats *accum)
3491 {
3492         struct vmxnet3_rxq_stats *st;
3493
3494         st = &rxq->vxrxq_stats;
3495
3496         accum->vmrxs_ipackets += st->vmrxs_ipackets;
3497         accum->vmrxs_ibytes += st->vmrxs_ibytes;
3498         accum->vmrxs_iqdrops += st->vmrxs_iqdrops;
3499         accum->vmrxs_ierrors += st->vmrxs_ierrors;
3500 }
3501
3502 static void
3503 vmxnet3_accumulate_stats(struct vmxnet3_softc *sc)
3504 {
3505         struct ifnet *ifp;
3506         struct vmxnet3_statistics *st;
3507         struct vmxnet3_txq_stats txaccum;
3508         struct vmxnet3_rxq_stats rxaccum;
3509         int i;
3510
3511         ifp = sc->vmx_ifp;
3512         st = &sc->vmx_stats;
3513
3514         bzero(&txaccum, sizeof(struct vmxnet3_txq_stats));
3515         bzero(&rxaccum, sizeof(struct vmxnet3_rxq_stats));
3516
3517         for (i = 0; i < sc->vmx_ntxqueues; i++)
3518                 vmxnet3_txq_accum_stats(&sc->vmx_txq[i], &txaccum);
3519         for (i = 0; i < sc->vmx_nrxqueues; i++)
3520                 vmxnet3_rxq_accum_stats(&sc->vmx_rxq[i], &rxaccum);
3521
3522         /*
3523          * With the exception of if_ierrors, these ifnet statistics are
3524          * only updated in the driver, so just set them to our accumulated
3525          * values. if_ierrors is updated in ether_input() for malformed
3526          * frames that we should have already discarded.
3527          */
3528         ifp->if_ipackets = rxaccum.vmrxs_ipackets;
3529         ifp->if_iqdrops = rxaccum.vmrxs_iqdrops;
3530         ifp->if_ierrors = rxaccum.vmrxs_ierrors;
3531         ifp->if_opackets = txaccum.vmtxs_opackets;
3532 #ifndef VMXNET3_LEGACY_TX
3533         ifp->if_obytes = txaccum.vmtxs_obytes;
3534         ifp->if_omcasts = txaccum.vmtxs_omcasts;
3535 #endif
3536 }
3537
3538 static void
3539 vmxnet3_tick(void *xsc)
3540 {
3541         struct vmxnet3_softc *sc;
3542         struct ifnet *ifp;
3543         int i, timedout;
3544
3545         sc = xsc;
3546         ifp = sc->vmx_ifp;
3547         timedout = 0;
3548
3549         VMXNET3_CORE_LOCK_ASSERT(sc);
3550
3551         vmxnet3_accumulate_stats(sc);
3552         vmxnet3_refresh_host_stats(sc);
3553
3554         for (i = 0; i < sc->vmx_ntxqueues; i++)
3555                 timedout |= vmxnet3_watchdog(&sc->vmx_txq[i]);
3556
3557         if (timedout != 0) {
3558                 ifp->if_flags &= ~IFF_RUNNING;
3559                 vmxnet3_init_locked(sc);
3560         } else
3561                 callout_reset(&sc->vmx_tick, hz, vmxnet3_tick, sc);
3562 }
3563
3564 static int
3565 vmxnet3_link_is_up(struct vmxnet3_softc *sc)
3566 {
3567         uint32_t status;
3568
3569         /* Also update the link speed while here. */
3570         status = vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_LINK);
3571         sc->vmx_link_speed = status >> 16;
3572         return !!(status & 0x1);
3573 }
3574
3575 static void
3576 vmxnet3_link_status(struct vmxnet3_softc *sc)
3577 {
3578         struct ifnet *ifp;
3579         int link;
3580
3581         ifp = sc->vmx_ifp;
3582         link = vmxnet3_link_is_up(sc);
3583
3584         if (link != 0 && sc->vmx_link_active == 0) {
3585                 sc->vmx_link_active = 1;
3586                 ifp->if_link_state = LINK_STATE_UP;
3587                 if_link_state_change(ifp);
3588         } else if (link == 0 && sc->vmx_link_active != 0) {
3589                 sc->vmx_link_active = 0;
3590                 ifp->if_link_state = LINK_STATE_DOWN;
3591                 if_link_state_change(ifp);
3592         }
3593 }
3594
3595 static void
3596 vmxnet3_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
3597 {
3598         struct vmxnet3_softc *sc;
3599
3600         sc = ifp->if_softc;
3601
3602         ifmr->ifm_active = IFM_ETHER | IFM_AUTO;
3603         ifmr->ifm_status = IFM_AVALID;
3604
3605         VMXNET3_CORE_LOCK(sc);
3606         if (vmxnet3_link_is_up(sc) != 0)
3607                 ifmr->ifm_status |= IFM_ACTIVE;
3608         else
3609                 ifmr->ifm_status |= IFM_NONE;
3610         VMXNET3_CORE_UNLOCK(sc);
3611 }
3612
3613 static int
3614 vmxnet3_media_change(struct ifnet *ifp)
3615 {
3616
3617         /* Ignore. */
3618         return (0);
3619 }
3620
3621 static void
3622 vmxnet3_set_lladdr(struct vmxnet3_softc *sc)
3623 {
3624         uint32_t ml, mh;
3625
3626         ml  = sc->vmx_lladdr[0];
3627         ml |= sc->vmx_lladdr[1] << 8;
3628         ml |= sc->vmx_lladdr[2] << 16;
3629         ml |= sc->vmx_lladdr[3] << 24;
3630         vmxnet3_write_bar1(sc, VMXNET3_BAR1_MACL, ml);
3631
3632         mh  = sc->vmx_lladdr[4];
3633         mh |= sc->vmx_lladdr[5] << 8;
3634         vmxnet3_write_bar1(sc, VMXNET3_BAR1_MACH, mh);
3635 }
3636
3637 static void
3638 vmxnet3_get_lladdr(struct vmxnet3_softc *sc)
3639 {
3640         uint32_t ml, mh;
3641
3642         ml = vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_MACL);
3643         mh = vmxnet3_read_cmd(sc, VMXNET3_CMD_GET_MACH);
3644
3645         sc->vmx_lladdr[0] = ml;
3646         sc->vmx_lladdr[1] = ml >> 8;
3647         sc->vmx_lladdr[2] = ml >> 16;
3648         sc->vmx_lladdr[3] = ml >> 24;
3649         sc->vmx_lladdr[4] = mh;
3650         sc->vmx_lladdr[5] = mh >> 8;
3651 }
3652
3653 static void
3654 vmxnet3_setup_txq_sysctl(struct vmxnet3_txqueue *txq,
3655     struct sysctl_ctx_list *ctx, struct sysctl_oid_list *child)
3656 {
3657         struct sysctl_oid *node, *txsnode;
3658         struct sysctl_oid_list *list, *txslist;
3659         struct vmxnet3_txq_stats *stats;
3660         struct UPT1_TxStats *txstats;
3661         char namebuf[16];
3662
3663         stats = &txq->vxtxq_stats;
3664         txstats = &txq->vxtxq_ts->stats;
3665
3666         ksnprintf(namebuf, sizeof(namebuf), "txq%d", txq->vxtxq_id);
3667         node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf, CTLFLAG_RD,
3668             NULL, "Transmit Queue");
3669         txq->vxtxq_sysctl = list = SYSCTL_CHILDREN(node);
3670
3671         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "opackets", CTLFLAG_RD,
3672             &stats->vmtxs_opackets, 0, "Transmit packets");
3673         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "obytes", CTLFLAG_RD,
3674             &stats->vmtxs_obytes, 0, "Transmit bytes");
3675         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "omcasts", CTLFLAG_RD,
3676             &stats->vmtxs_omcasts, 0, "Transmit multicasts");
3677         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum", CTLFLAG_RD,
3678             &stats->vmtxs_csum, 0, "Transmit checksum offloaded");
3679         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "tso", CTLFLAG_RD,
3680             &stats->vmtxs_tso, 0, "Transmit TCP segmentation offloaded");
3681         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ringfull", CTLFLAG_RD,
3682             &stats->vmtxs_full, 0, "Transmit ring full");
3683         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "offload_failed", CTLFLAG_RD,
3684             &stats->vmtxs_offload_failed, 0, "Transmit checksum offload failed");
3685
3686         /*
3687          * Add statistics reported by the host. These are updated once
3688          * per second.
3689          */
3690         txsnode = SYSCTL_ADD_NODE(ctx, list, OID_AUTO, "hstats", CTLFLAG_RD,
3691             NULL, "Host Statistics");
3692         txslist = SYSCTL_CHILDREN(txsnode);
3693 #if 0 /* XXX TSO */
3694         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "tso_packets", CTLFLAG_RD,
3695             &txstats->TSO_packets, 0, "TSO packets");
3696         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "tso_bytes", CTLFLAG_RD,
3697             &txstats->TSO_bytes, 0, "TSO bytes");
3698 #endif
3699         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "ucast_packets", CTLFLAG_RD,
3700             &txstats->ucast_packets, 0, "Unicast packets");
3701         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "unicast_bytes", CTLFLAG_RD,
3702             &txstats->ucast_bytes, 0, "Unicast bytes");
3703         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "mcast_packets", CTLFLAG_RD,
3704             &txstats->mcast_packets, 0, "Multicast packets");
3705         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "mcast_bytes", CTLFLAG_RD,
3706             &txstats->mcast_bytes, 0, "Multicast bytes");
3707         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "error", CTLFLAG_RD,
3708             &txstats->error, 0, "Errors");
3709         SYSCTL_ADD_UQUAD(ctx, txslist, OID_AUTO, "discard", CTLFLAG_RD,
3710             &txstats->discard, 0, "Discards");
3711 }
3712
3713 static void
3714 vmxnet3_setup_rxq_sysctl(struct vmxnet3_rxqueue *rxq,
3715     struct sysctl_ctx_list *ctx, struct sysctl_oid_list *child)
3716 {
3717         struct sysctl_oid *node, *rxsnode;
3718         struct sysctl_oid_list *list, *rxslist;
3719         struct vmxnet3_rxq_stats *stats;
3720         struct UPT1_RxStats *rxstats;
3721         char namebuf[16];
3722
3723         stats = &rxq->vxrxq_stats;
3724         rxstats = &rxq->vxrxq_rs->stats;
3725
3726         ksnprintf(namebuf, sizeof(namebuf), "rxq%d", rxq->vxrxq_id);
3727         node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf, CTLFLAG_RD,
3728             NULL, "Receive Queue");
3729         rxq->vxrxq_sysctl = list = SYSCTL_CHILDREN(node);
3730
3731         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ipackets", CTLFLAG_RD,
3732             &stats->vmrxs_ipackets, 0, "Receive packets");
3733         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ibytes", CTLFLAG_RD,
3734             &stats->vmrxs_ibytes, 0, "Receive bytes");
3735         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "iqdrops", CTLFLAG_RD,
3736             &stats->vmrxs_iqdrops, 0, "Receive drops");
3737         SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ierrors", CTLFLAG_RD,
3738             &stats->vmrxs_ierrors, 0, "Receive errors");
3739
3740         /*
3741          * Add statistics reported by the host. These are updated once
3742          * per second.
3743          */
3744         rxsnode = SYSCTL_ADD_NODE(ctx, list, OID_AUTO, "hstats", CTLFLAG_RD,
3745             NULL, "Host Statistics");
3746         rxslist = SYSCTL_CHILDREN(rxsnode);
3747 #if 0 /* XXX LRO */
3748         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "lro_packets", CTLFLAG_RD,
3749             &rxstats->LRO_packets, 0, "LRO packets");
3750         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "lro_bytes", CTLFLAG_RD,
3751             &rxstats->LRO_bytes, 0, "LRO bytes");
3752 #endif
3753         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "ucast_packets", CTLFLAG_RD,
3754             &rxstats->ucast_packets, 0, "Unicast packets");
3755         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "unicast_bytes", CTLFLAG_RD,
3756             &rxstats->ucast_bytes, 0, "Unicast bytes");
3757         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "mcast_packets", CTLFLAG_RD,
3758             &rxstats->mcast_packets, 0, "Multicast packets");
3759         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "mcast_bytes", CTLFLAG_RD,
3760             &rxstats->mcast_bytes, 0, "Multicast bytes");
3761         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "bcast_packets", CTLFLAG_RD,
3762             &rxstats->bcast_packets, 0, "Broadcast packets");
3763         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "bcast_bytes", CTLFLAG_RD,
3764             &rxstats->bcast_bytes, 0, "Broadcast bytes");
3765         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "nobuffer", CTLFLAG_RD,
3766             &rxstats->nobuffer, 0, "No buffer");
3767         SYSCTL_ADD_UQUAD(ctx, rxslist, OID_AUTO, "error", CTLFLAG_RD,
3768             &rxstats->error, 0, "Errors");
3769 }
3770
3771 static void
3772 vmxnet3_setup_debug_sysctl(struct vmxnet3_softc *sc,
3773     struct sysctl_ctx_list *ctx, struct sysctl_oid_list *child)
3774 {
3775         struct sysctl_oid *node;
3776         struct sysctl_oid_list *list;
3777         int i;
3778
3779         for (i = 0; i < sc->vmx_ntxqueues; i++) {
3780                 struct vmxnet3_txqueue *txq = &sc->vmx_txq[i];
3781
3782                 node = SYSCTL_ADD_NODE(ctx, txq->vxtxq_sysctl, OID_AUTO,
3783                     "debug", CTLFLAG_RD, NULL, "");
3784                 list = SYSCTL_CHILDREN(node);
3785
3786                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd_head", CTLFLAG_RD,
3787                     &txq->vxtxq_cmd_ring.vxtxr_head, 0, "");
3788                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd_next", CTLFLAG_RD,
3789                     &txq->vxtxq_cmd_ring.vxtxr_next, 0, "");
3790                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd_ndesc", CTLFLAG_RD,
3791                     &txq->vxtxq_cmd_ring.vxtxr_ndesc, 0, "");
3792                 SYSCTL_ADD_INT(ctx, list, OID_AUTO, "cmd_gen", CTLFLAG_RD,
3793                     &txq->vxtxq_cmd_ring.vxtxr_gen, 0, "");
3794                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "comp_next", CTLFLAG_RD,
3795                     &txq->vxtxq_comp_ring.vxcr_next, 0, "");
3796                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "comp_ndesc", CTLFLAG_RD,
3797                     &txq->vxtxq_comp_ring.vxcr_ndesc, 0,"");
3798                 SYSCTL_ADD_INT(ctx, list, OID_AUTO, "comp_gen", CTLFLAG_RD,
3799                     &txq->vxtxq_comp_ring.vxcr_gen, 0, "");
3800         }
3801
3802         for (i = 0; i < sc->vmx_nrxqueues; i++) {
3803                 struct vmxnet3_rxqueue *rxq = &sc->vmx_rxq[i];
3804
3805                 node = SYSCTL_ADD_NODE(ctx, rxq->vxrxq_sysctl, OID_AUTO,
3806                     "debug", CTLFLAG_RD, NULL, "");
3807                 list = SYSCTL_CHILDREN(node);
3808
3809                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd0_fill", CTLFLAG_RD,
3810                     &rxq->vxrxq_cmd_ring[0].vxrxr_fill, 0, "");
3811                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd0_ndesc", CTLFLAG_RD,
3812                     &rxq->vxrxq_cmd_ring[0].vxrxr_ndesc, 0, "");
3813                 SYSCTL_ADD_INT(ctx, list, OID_AUTO, "cmd0_gen", CTLFLAG_RD,
3814                     &rxq->vxrxq_cmd_ring[0].vxrxr_gen, 0, "");
3815                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd1_fill", CTLFLAG_RD,
3816                     &rxq->vxrxq_cmd_ring[1].vxrxr_fill, 0, "");
3817                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "cmd1_ndesc", CTLFLAG_RD,
3818                     &rxq->vxrxq_cmd_ring[1].vxrxr_ndesc, 0, "");
3819                 SYSCTL_ADD_INT(ctx, list, OID_AUTO, "cmd1_gen", CTLFLAG_RD,
3820                     &rxq->vxrxq_cmd_ring[1].vxrxr_gen, 0, "");
3821                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "comp_next", CTLFLAG_RD,
3822                     &rxq->vxrxq_comp_ring.vxcr_next, 0, "");
3823                 SYSCTL_ADD_UINT(ctx, list, OID_AUTO, "comp_ndesc", CTLFLAG_RD,
3824                     &rxq->vxrxq_comp_ring.vxcr_ndesc, 0,"");
3825                 SYSCTL_ADD_INT(ctx, list, OID_AUTO, "comp_gen", CTLFLAG_RD,
3826                     &rxq->vxrxq_comp_ring.vxcr_gen, 0, "");
3827         }
3828 }
3829
3830 static void
3831 vmxnet3_setup_queue_sysctl(struct vmxnet3_softc *sc,
3832     struct sysctl_ctx_list *ctx, struct sysctl_oid_list *child)
3833 {
3834         int i;
3835
3836         for (i = 0; i < sc->vmx_ntxqueues; i++)
3837                 vmxnet3_setup_txq_sysctl(&sc->vmx_txq[i], ctx, child);
3838         for (i = 0; i < sc->vmx_nrxqueues; i++)
3839                 vmxnet3_setup_rxq_sysctl(&sc->vmx_rxq[i], ctx, child);
3840
3841         vmxnet3_setup_debug_sysctl(sc, ctx, child);
3842 }
3843
3844 static void
3845 vmxnet3_setup_sysctl(struct vmxnet3_softc *sc)
3846 {
3847         device_t dev;
3848         struct vmxnet3_statistics *stats;
3849         struct sysctl_ctx_list *ctx;
3850         struct sysctl_oid *tree;
3851         struct sysctl_oid_list *child;
3852
3853         dev = sc->vmx_dev;
3854         ctx = device_get_sysctl_ctx(dev);
3855         tree = device_get_sysctl_tree(dev);
3856         child = SYSCTL_CHILDREN(tree);
3857
3858         SYSCTL_ADD_INT(ctx, child, OID_AUTO, "max_ntxqueues", CTLFLAG_RD,
3859             &sc->vmx_max_ntxqueues, 0, "Maximum number of Tx queues");
3860         SYSCTL_ADD_INT(ctx, child, OID_AUTO, "max_nrxqueues", CTLFLAG_RD,
3861             &sc->vmx_max_nrxqueues, 0, "Maximum number of Rx queues");
3862         SYSCTL_ADD_INT(ctx, child, OID_AUTO, "ntxqueues", CTLFLAG_RD,
3863             &sc->vmx_ntxqueues, 0, "Number of Tx queues");
3864         SYSCTL_ADD_INT(ctx, child, OID_AUTO, "nrxqueues", CTLFLAG_RD,
3865             &sc->vmx_nrxqueues, 0, "Number of Rx queues");
3866
3867         stats = &sc->vmx_stats;
3868         SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "defragged", CTLFLAG_RD,
3869             &stats->vmst_defragged, 0, "Tx mbuf chains defragged");
3870         SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "defrag_failed", CTLFLAG_RD,
3871             &stats->vmst_defrag_failed, 0,
3872             "Tx mbuf dropped because defrag failed");
3873         SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "mgetcl_failed", CTLFLAG_RD,
3874             &stats->vmst_mgetcl_failed, 0, "mbuf cluster allocation failed");
3875         SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "mbuf_load_failed", CTLFLAG_RD,
3876             &stats->vmst_mbuf_load_failed, 0, "mbuf load segments failed");
3877
3878         vmxnet3_setup_queue_sysctl(sc, ctx, child);
3879 }
3880
3881 static void
3882 vmxnet3_write_bar0(struct vmxnet3_softc *sc, bus_size_t r, uint32_t v)
3883 {
3884
3885         bus_space_write_4(sc->vmx_iot0, sc->vmx_ioh0, r, v);
3886 }
3887
3888 static uint32_t
3889 vmxnet3_read_bar1(struct vmxnet3_softc *sc, bus_size_t r)
3890 {
3891
3892         return (bus_space_read_4(sc->vmx_iot1, sc->vmx_ioh1, r));
3893 }
3894
3895 static void
3896 vmxnet3_write_bar1(struct vmxnet3_softc *sc, bus_size_t r, uint32_t v)
3897 {
3898
3899         bus_space_write_4(sc->vmx_iot1, sc->vmx_ioh1, r, v);
3900 }
3901
3902 static void
3903 vmxnet3_write_cmd(struct vmxnet3_softc *sc, uint32_t cmd)
3904 {
3905
3906         vmxnet3_write_bar1(sc, VMXNET3_BAR1_CMD, cmd);
3907 }
3908
3909 static uint32_t
3910 vmxnet3_read_cmd(struct vmxnet3_softc *sc, uint32_t cmd)
3911 {
3912
3913         vmxnet3_write_cmd(sc, cmd);
3914         bus_space_barrier(sc->vmx_iot1, sc->vmx_ioh1, 0, 0,
3915             BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
3916         return (vmxnet3_read_bar1(sc, VMXNET3_BAR1_CMD));
3917 }
3918
3919 static void
3920 vmxnet3_enable_intr(struct vmxnet3_softc *sc, int irq)
3921 {
3922
3923         vmxnet3_write_bar0(sc, VMXNET3_BAR0_IMASK(irq), 0);
3924 }
3925
3926 static void
3927 vmxnet3_disable_intr(struct vmxnet3_softc *sc, int irq)
3928 {
3929
3930         vmxnet3_write_bar0(sc, VMXNET3_BAR0_IMASK(irq), 1);
3931 }
3932
3933 static void
3934 vmxnet3_enable_all_intrs(struct vmxnet3_softc *sc)
3935 {
3936         int i;
3937
3938         sc->vmx_ds->ictrl &= ~VMXNET3_ICTRL_DISABLE_ALL;
3939         for (i = 0; i < sc->vmx_nintrs; i++)
3940                 vmxnet3_enable_intr(sc, i);
3941 }
3942
3943 static void
3944 vmxnet3_disable_all_intrs(struct vmxnet3_softc *sc)
3945 {
3946         int i;
3947
3948         sc->vmx_ds->ictrl |= VMXNET3_ICTRL_DISABLE_ALL;
3949         for (i = 0; i < sc->vmx_nintrs; i++)
3950                 vmxnet3_disable_intr(sc, i);
3951 }
3952
3953 static void
3954 vmxnet3_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
3955 {
3956         bus_addr_t *baddr = arg;
3957
3958         if (error == 0)
3959                 *baddr = segs->ds_addr;
3960 }
3961
3962 static int
3963 vmxnet3_dma_malloc(struct vmxnet3_softc *sc, bus_size_t size, bus_size_t align,
3964     struct vmxnet3_dma_alloc *dma)
3965 {
3966         device_t dev;
3967         int error;
3968
3969         dev = sc->vmx_dev;
3970         bzero(dma, sizeof(struct vmxnet3_dma_alloc));
3971
3972         error = bus_dma_tag_create(bus_get_dma_tag(dev),
3973             align, 0,           /* alignment, bounds */
3974             BUS_SPACE_MAXADDR,  /* lowaddr */
3975             BUS_SPACE_MAXADDR,  /* highaddr */
3976             NULL, NULL,         /* filter, filterarg */
3977             size,               /* maxsize */
3978             1,                  /* nsegments */
3979             size,               /* maxsegsize */
3980             BUS_DMA_ALLOCNOW,   /* flags */
3981             &dma->dma_tag);
3982         if (error) {
3983                 device_printf(dev, "bus_dma_tag_create failed: %d\n", error);
3984                 goto fail;
3985         }
3986
3987         error = bus_dmamem_alloc(dma->dma_tag, (void **)&dma->dma_vaddr,
3988             BUS_DMA_ZERO | BUS_DMA_NOWAIT, &dma->dma_map);
3989         if (error) {
3990                 device_printf(dev, "bus_dmamem_alloc failed: %d\n", error);
3991                 goto fail;
3992         }
3993
3994         error = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr,
3995             size, vmxnet3_dmamap_cb, &dma->dma_paddr, BUS_DMA_NOWAIT);
3996         if (error) {
3997                 device_printf(dev, "bus_dmamap_load failed: %d\n", error);
3998                 goto fail;
3999         }
4000
4001         dma->dma_size = size;
4002
4003 fail:
4004         if (error)
4005                 vmxnet3_dma_free(sc, dma);
4006
4007         return (error);
4008 }
4009
4010 static void
4011 vmxnet3_dma_free(struct vmxnet3_softc *sc, struct vmxnet3_dma_alloc *dma)
4012 {
4013
4014         if (dma->dma_tag != NULL) {
4015                 if (dma->dma_paddr != 0) {
4016                         bus_dmamap_sync(dma->dma_tag, dma->dma_map,