jme: Correct RSS key registers configuration order
[dragonfly.git] / sys / dev / netif / jme / if_jme.c
1 /*-
2  * Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice unmodified, this list of conditions, and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD: src/sys/dev/jme/if_jme.c,v 1.2 2008/07/18 04:20:48 yongari Exp $
28  */
29
30 #include "opt_ifpoll.h"
31 #include "opt_jme.h"
32
33 #include <sys/param.h>
34 #include <sys/endian.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/interrupt.h>
38 #include <sys/malloc.h>
39 #include <sys/proc.h>
40 #include <sys/rman.h>
41 #include <sys/serialize.h>
42 #include <sys/serialize2.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
45 #include <sys/sysctl.h>
46
47 #include <net/ethernet.h>
48 #include <net/if.h>
49 #include <net/bpf.h>
50 #include <net/if_arp.h>
51 #include <net/if_dl.h>
52 #include <net/if_media.h>
53 #include <net/if_poll.h>
54 #include <net/ifq_var.h>
55 #include <net/toeplitz.h>
56 #include <net/toeplitz2.h>
57 #include <net/vlan/if_vlan_var.h>
58 #include <net/vlan/if_vlan_ether.h>
59
60 #include <netinet/ip.h>
61 #include <netinet/tcp.h>
62
63 #include <dev/netif/mii_layer/miivar.h>
64 #include <dev/netif/mii_layer/jmphyreg.h>
65
66 #include <bus/pci/pcireg.h>
67 #include <bus/pci/pcivar.h>
68 #include <bus/pci/pcidevs.h>
69
70 #include <dev/netif/jme/if_jmereg.h>
71 #include <dev/netif/jme/if_jmevar.h>
72
73 #include "miibus_if.h"
74
75 #define JME_TICK_CPUID          0       /* DO NOT CHANGE THIS */
76
77 #define JME_TX_SERIALIZE        1
78 #define JME_RX_SERIALIZE        2
79
80 #define JME_CSUM_FEATURES       (CSUM_IP | CSUM_TCP | CSUM_UDP)
81
82 #ifdef JME_RSS_DEBUG
83 #define JME_RSS_DPRINTF(sc, lvl, fmt, ...) \
84 do { \
85         if ((sc)->jme_rss_debug >= (lvl)) \
86                 if_printf(&(sc)->arpcom.ac_if, fmt, __VA_ARGS__); \
87 } while (0)
88 #else   /* !JME_RSS_DEBUG */
89 #define JME_RSS_DPRINTF(sc, lvl, fmt, ...)      ((void)0)
90 #endif  /* JME_RSS_DEBUG */
91
92 static int      jme_probe(device_t);
93 static int      jme_attach(device_t);
94 static int      jme_detach(device_t);
95 static int      jme_shutdown(device_t);
96 static int      jme_suspend(device_t);
97 static int      jme_resume(device_t);
98
99 static int      jme_miibus_readreg(device_t, int, int);
100 static int      jme_miibus_writereg(device_t, int, int, int);
101 static void     jme_miibus_statchg(device_t);
102
103 static void     jme_init(void *);
104 static int      jme_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
105 static void     jme_start(struct ifnet *, struct ifaltq_subque *);
106 static void     jme_watchdog(struct ifnet *);
107 static void     jme_mediastatus(struct ifnet *, struct ifmediareq *);
108 static int      jme_mediachange(struct ifnet *);
109 #ifdef IFPOLL_ENABLE
110 static void     jme_npoll(struct ifnet *, struct ifpoll_info *);
111 static void     jme_npoll_status(struct ifnet *);
112 static void     jme_npoll_rx(struct ifnet *, void *, int);
113 static void     jme_npoll_tx(struct ifnet *, void *, int);
114 #endif
115 static void     jme_serialize(struct ifnet *, enum ifnet_serialize);
116 static void     jme_deserialize(struct ifnet *, enum ifnet_serialize);
117 static int      jme_tryserialize(struct ifnet *, enum ifnet_serialize);
118 #ifdef INVARIANTS
119 static void     jme_serialize_assert(struct ifnet *, enum ifnet_serialize,
120                     boolean_t);
121 #endif
122
123 static void     jme_intr(void *);
124 static void     jme_msix_tx(void *);
125 static void     jme_msix_rx(void *);
126 static void     jme_msix_status(void *);
127 static void     jme_txeof(struct jme_txdata *);
128 static void     jme_rxeof(struct jme_rxdata *, int);
129 static void     jme_rx_intr(struct jme_softc *, uint32_t);
130 static void     jme_enable_intr(struct jme_softc *);
131 static void     jme_disable_intr(struct jme_softc *);
132 static void     jme_rx_restart(struct jme_softc *, uint32_t);
133
134 static int      jme_msix_setup(device_t);
135 static void     jme_msix_teardown(device_t, int);
136 static int      jme_intr_setup(device_t);
137 static void     jme_intr_teardown(device_t);
138 static void     jme_msix_try_alloc(device_t);
139 static void     jme_msix_free(device_t);
140 static int      jme_intr_alloc(device_t);
141 static void     jme_intr_free(device_t);
142 static int      jme_dma_alloc(struct jme_softc *);
143 static void     jme_dma_free(struct jme_softc *);
144 static int      jme_init_rx_ring(struct jme_rxdata *);
145 static void     jme_init_tx_ring(struct jme_txdata *);
146 static void     jme_init_ssb(struct jme_softc *);
147 static int      jme_newbuf(struct jme_rxdata *, struct jme_rxdesc *, int);
148 static int      jme_encap(struct jme_txdata *, struct mbuf **, int *);
149 static void     jme_rxpkt(struct jme_rxdata *);
150 static int      jme_rxring_dma_alloc(struct jme_rxdata *);
151 static int      jme_rxbuf_dma_alloc(struct jme_rxdata *);
152 static int      jme_rxbuf_dma_filter(void *, bus_addr_t);
153
154 static void     jme_tick(void *);
155 static void     jme_stop(struct jme_softc *);
156 static void     jme_reset(struct jme_softc *);
157 static void     jme_set_msinum(struct jme_softc *);
158 static void     jme_set_vlan(struct jme_softc *);
159 static void     jme_set_filter(struct jme_softc *);
160 static void     jme_stop_tx(struct jme_softc *);
161 static void     jme_stop_rx(struct jme_softc *);
162 static void     jme_mac_config(struct jme_softc *);
163 static void     jme_reg_macaddr(struct jme_softc *, uint8_t[]);
164 static int      jme_eeprom_macaddr(struct jme_softc *, uint8_t[]);
165 static int      jme_eeprom_read_byte(struct jme_softc *, uint8_t, uint8_t *);
166 #ifdef notyet
167 static void     jme_setwol(struct jme_softc *);
168 static void     jme_setlinkspeed(struct jme_softc *);
169 #endif
170 static void     jme_set_tx_coal(struct jme_softc *);
171 static void     jme_set_rx_coal(struct jme_softc *);
172 static void     jme_enable_rss(struct jme_softc *);
173 static void     jme_disable_rss(struct jme_softc *);
174 static void     jme_serialize_skipmain(struct jme_softc *);
175 static void     jme_deserialize_skipmain(struct jme_softc *);
176
177 static void     jme_sysctl_node(struct jme_softc *);
178 static int      jme_sysctl_tx_coal_to(SYSCTL_HANDLER_ARGS);
179 static int      jme_sysctl_tx_coal_pkt(SYSCTL_HANDLER_ARGS);
180 static int      jme_sysctl_rx_coal_to(SYSCTL_HANDLER_ARGS);
181 static int      jme_sysctl_rx_coal_pkt(SYSCTL_HANDLER_ARGS);
182 #ifdef IFPOLL_ENABLE
183 static int      jme_sysctl_npoll_rxoff(SYSCTL_HANDLER_ARGS);
184 static int      jme_sysctl_npoll_txoff(SYSCTL_HANDLER_ARGS);
185 #endif
186
187 /*
188  * Devices supported by this driver.
189  */
190 static const struct jme_dev {
191         uint16_t        jme_vendorid;
192         uint16_t        jme_deviceid;
193         uint32_t        jme_caps;
194         const char      *jme_name;
195 } jme_devs[] = {
196         { PCI_VENDOR_JMICRON, PCI_PRODUCT_JMICRON_JMC250,
197             JME_CAP_JUMBO,
198             "JMicron Inc, JMC250 Gigabit Ethernet" },
199         { PCI_VENDOR_JMICRON, PCI_PRODUCT_JMICRON_JMC260,
200             JME_CAP_FASTETH,
201             "JMicron Inc, JMC260 Fast Ethernet" },
202         { 0, 0, 0, NULL }
203 };
204
205 static device_method_t jme_methods[] = {
206         /* Device interface. */
207         DEVMETHOD(device_probe,         jme_probe),
208         DEVMETHOD(device_attach,        jme_attach),
209         DEVMETHOD(device_detach,        jme_detach),
210         DEVMETHOD(device_shutdown,      jme_shutdown),
211         DEVMETHOD(device_suspend,       jme_suspend),
212         DEVMETHOD(device_resume,        jme_resume),
213
214         /* Bus interface. */
215         DEVMETHOD(bus_print_child,      bus_generic_print_child),
216         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
217
218         /* MII interface. */
219         DEVMETHOD(miibus_readreg,       jme_miibus_readreg),
220         DEVMETHOD(miibus_writereg,      jme_miibus_writereg),
221         DEVMETHOD(miibus_statchg,       jme_miibus_statchg),
222
223         { NULL, NULL }
224 };
225
226 static driver_t jme_driver = {
227         "jme",
228         jme_methods,
229         sizeof(struct jme_softc)
230 };
231
232 static devclass_t jme_devclass;
233
234 DECLARE_DUMMY_MODULE(if_jme);
235 MODULE_DEPEND(if_jme, miibus, 1, 1, 1);
236 DRIVER_MODULE(if_jme, pci, jme_driver, jme_devclass, NULL, NULL);
237 DRIVER_MODULE(miibus, jme, miibus_driver, miibus_devclass, NULL, NULL);
238
239 static const struct {
240         uint32_t        jme_coal;
241         uint32_t        jme_comp;
242         uint32_t        jme_empty;
243 } jme_rx_status[JME_NRXRING_MAX] = {
244         { INTR_RXQ0_COAL | INTR_RXQ0_COAL_TO, INTR_RXQ0_COMP,
245           INTR_RXQ0_DESC_EMPTY },
246         { INTR_RXQ1_COAL | INTR_RXQ1_COAL_TO, INTR_RXQ1_COMP,
247           INTR_RXQ1_DESC_EMPTY },
248         { INTR_RXQ2_COAL | INTR_RXQ2_COAL_TO, INTR_RXQ2_COMP,
249           INTR_RXQ2_DESC_EMPTY },
250         { INTR_RXQ3_COAL | INTR_RXQ3_COAL_TO, INTR_RXQ3_COMP,
251           INTR_RXQ3_DESC_EMPTY }
252 };
253
254 static int      jme_rx_desc_count = JME_RX_DESC_CNT_DEF;
255 static int      jme_tx_desc_count = JME_TX_DESC_CNT_DEF;
256 static int      jme_rx_ring_count = 0;
257 static int      jme_msi_enable = 1;
258 static int      jme_msix_enable = 1;
259
260 TUNABLE_INT("hw.jme.rx_desc_count", &jme_rx_desc_count);
261 TUNABLE_INT("hw.jme.tx_desc_count", &jme_tx_desc_count);
262 TUNABLE_INT("hw.jme.rx_ring_count", &jme_rx_ring_count);
263 TUNABLE_INT("hw.jme.msi.enable", &jme_msi_enable);
264 TUNABLE_INT("hw.jme.msix.enable", &jme_msix_enable);
265
266 static __inline void
267 jme_setup_rxdesc(struct jme_rxdesc *rxd)
268 {
269         struct jme_desc *desc;
270
271         desc = rxd->rx_desc;
272         desc->buflen = htole32(MCLBYTES);
273         desc->addr_lo = htole32(JME_ADDR_LO(rxd->rx_paddr));
274         desc->addr_hi = htole32(JME_ADDR_HI(rxd->rx_paddr));
275         desc->flags = htole32(JME_RD_OWN | JME_RD_INTR | JME_RD_64BIT);
276 }
277
278 /*
279  *      Read a PHY register on the MII of the JMC250.
280  */
281 static int
282 jme_miibus_readreg(device_t dev, int phy, int reg)
283 {
284         struct jme_softc *sc = device_get_softc(dev);
285         uint32_t val;
286         int i;
287
288         /* For FPGA version, PHY address 0 should be ignored. */
289         if (sc->jme_caps & JME_CAP_FPGA) {
290                 if (phy == 0)
291                         return (0);
292         } else {
293                 if (sc->jme_phyaddr != phy)
294                         return (0);
295         }
296
297         CSR_WRITE_4(sc, JME_SMI, SMI_OP_READ | SMI_OP_EXECUTE |
298             SMI_PHY_ADDR(phy) | SMI_REG_ADDR(reg));
299
300         for (i = JME_PHY_TIMEOUT; i > 0; i--) {
301                 DELAY(1);
302                 if (((val = CSR_READ_4(sc, JME_SMI)) & SMI_OP_EXECUTE) == 0)
303                         break;
304         }
305         if (i == 0) {
306                 device_printf(sc->jme_dev, "phy read timeout: "
307                               "phy %d, reg %d\n", phy, reg);
308                 return (0);
309         }
310
311         return ((val & SMI_DATA_MASK) >> SMI_DATA_SHIFT);
312 }
313
314 /*
315  *      Write a PHY register on the MII of the JMC250.
316  */
317 static int
318 jme_miibus_writereg(device_t dev, int phy, int reg, int val)
319 {
320         struct jme_softc *sc = device_get_softc(dev);
321         int i;
322
323         /* For FPGA version, PHY address 0 should be ignored. */
324         if (sc->jme_caps & JME_CAP_FPGA) {
325                 if (phy == 0)
326                         return (0);
327         } else {
328                 if (sc->jme_phyaddr != phy)
329                         return (0);
330         }
331
332         CSR_WRITE_4(sc, JME_SMI, SMI_OP_WRITE | SMI_OP_EXECUTE |
333             ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
334             SMI_PHY_ADDR(phy) | SMI_REG_ADDR(reg));
335
336         for (i = JME_PHY_TIMEOUT; i > 0; i--) {
337                 DELAY(1);
338                 if (((val = CSR_READ_4(sc, JME_SMI)) & SMI_OP_EXECUTE) == 0)
339                         break;
340         }
341         if (i == 0) {
342                 device_printf(sc->jme_dev, "phy write timeout: "
343                               "phy %d, reg %d\n", phy, reg);
344         }
345
346         return (0);
347 }
348
349 /*
350  *      Callback from MII layer when media changes.
351  */
352 static void
353 jme_miibus_statchg(device_t dev)
354 {
355         struct jme_softc *sc = device_get_softc(dev);
356         struct ifnet *ifp = &sc->arpcom.ac_if;
357         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
358         struct mii_data *mii;
359         struct jme_txdesc *txd;
360         bus_addr_t paddr;
361         int i, r;
362
363         if (sc->jme_in_tick)
364                 jme_serialize_skipmain(sc);
365         ASSERT_IFNET_SERIALIZED_ALL(ifp);
366
367         if ((ifp->if_flags & IFF_RUNNING) == 0)
368                 goto done;
369
370         mii = device_get_softc(sc->jme_miibus);
371
372         sc->jme_has_link = FALSE;
373         if ((mii->mii_media_status & IFM_AVALID) != 0) {
374                 switch (IFM_SUBTYPE(mii->mii_media_active)) {
375                 case IFM_10_T:
376                 case IFM_100_TX:
377                         sc->jme_has_link = TRUE;
378                         break;
379                 case IFM_1000_T:
380                         if (sc->jme_caps & JME_CAP_FASTETH)
381                                 break;
382                         sc->jme_has_link = TRUE;
383                         break;
384                 default:
385                         break;
386                 }
387         }
388
389         /*
390          * Disabling Rx/Tx MACs have a side-effect of resetting
391          * JME_TXNDA/JME_RXNDA register to the first address of
392          * Tx/Rx descriptor address. So driver should reset its
393          * internal procucer/consumer pointer and reclaim any
394          * allocated resources.  Note, just saving the value of
395          * JME_TXNDA and JME_RXNDA registers before stopping MAC
396          * and restoring JME_TXNDA/JME_RXNDA register is not
397          * sufficient to make sure correct MAC state because
398          * stopping MAC operation can take a while and hardware
399          * might have updated JME_TXNDA/JME_RXNDA registers
400          * during the stop operation.
401          */
402
403         /* Disable interrupts */
404         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, JME_INTRS);
405
406         /* Stop driver */
407         ifp->if_flags &= ~IFF_RUNNING;
408         ifq_clr_oactive(&ifp->if_snd);
409         ifp->if_timer = 0;
410         callout_stop(&sc->jme_tick_ch);
411
412         /* Stop receiver/transmitter. */
413         jme_stop_rx(sc);
414         jme_stop_tx(sc);
415
416         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
417                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[r];
418
419                 jme_rxeof(rdata, -1);
420                 if (rdata->jme_rxhead != NULL)
421                         m_freem(rdata->jme_rxhead);
422                 JME_RXCHAIN_RESET(rdata);
423
424                 /*
425                  * Reuse configured Rx descriptors and reset
426                  * procuder/consumer index.
427                  */
428                 rdata->jme_rx_cons = 0;
429         }
430         if (JME_ENABLE_HWRSS(sc))
431                 jme_enable_rss(sc);
432         else
433                 jme_disable_rss(sc);
434
435         jme_txeof(tdata);
436         if (tdata->jme_tx_cnt != 0) {
437                 /* Remove queued packets for transmit. */
438                 for (i = 0; i < tdata->jme_tx_desc_cnt; i++) {
439                         txd = &tdata->jme_txdesc[i];
440                         if (txd->tx_m != NULL) {
441                                 bus_dmamap_unload( tdata->jme_tx_tag,
442                                     txd->tx_dmamap);
443                                 m_freem(txd->tx_m);
444                                 txd->tx_m = NULL;
445                                 txd->tx_ndesc = 0;
446                                 IFNET_STAT_INC(ifp, oerrors, 1);
447                         }
448                 }
449         }
450         jme_init_tx_ring(tdata);
451
452         /* Initialize shadow status block. */
453         jme_init_ssb(sc);
454
455         /* Program MAC with resolved speed/duplex/flow-control. */
456         if (sc->jme_has_link) {
457                 jme_mac_config(sc);
458
459                 CSR_WRITE_4(sc, JME_TXCSR, sc->jme_txcsr);
460
461                 /* Set Tx ring address to the hardware. */
462                 paddr = tdata->jme_tx_ring_paddr;
463                 CSR_WRITE_4(sc, JME_TXDBA_HI, JME_ADDR_HI(paddr));
464                 CSR_WRITE_4(sc, JME_TXDBA_LO, JME_ADDR_LO(paddr));
465
466                 for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
467                         CSR_WRITE_4(sc, JME_RXCSR,
468                             sc->jme_rxcsr | RXCSR_RXQ_N_SEL(r));
469
470                         /* Set Rx ring address to the hardware. */
471                         paddr = sc->jme_cdata.jme_rx_data[r].jme_rx_ring_paddr;
472                         CSR_WRITE_4(sc, JME_RXDBA_HI, JME_ADDR_HI(paddr));
473                         CSR_WRITE_4(sc, JME_RXDBA_LO, JME_ADDR_LO(paddr));
474                 }
475
476                 /* Restart receiver/transmitter. */
477                 CSR_WRITE_4(sc, JME_RXCSR, sc->jme_rxcsr | RXCSR_RX_ENB |
478                     RXCSR_RXQ_START);
479                 CSR_WRITE_4(sc, JME_TXCSR, sc->jme_txcsr | TXCSR_TX_ENB);
480         }
481
482         ifp->if_flags |= IFF_RUNNING;
483         ifq_clr_oactive(&ifp->if_snd);
484         callout_reset_bycpu(&sc->jme_tick_ch, hz, jme_tick, sc,
485             JME_TICK_CPUID);
486
487 #ifdef IFPOLL_ENABLE
488         if (!(ifp->if_flags & IFF_NPOLLING))
489 #endif
490         /* Reenable interrupts. */
491         CSR_WRITE_4(sc, JME_INTR_MASK_SET, JME_INTRS);
492
493 done:
494         if (sc->jme_in_tick)
495                 jme_deserialize_skipmain(sc);
496 }
497
498 /*
499  *      Get the current interface media status.
500  */
501 static void
502 jme_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
503 {
504         struct jme_softc *sc = ifp->if_softc;
505         struct mii_data *mii = device_get_softc(sc->jme_miibus);
506
507         ASSERT_IFNET_SERIALIZED_ALL(ifp);
508
509         mii_pollstat(mii);
510         ifmr->ifm_status = mii->mii_media_status;
511         ifmr->ifm_active = mii->mii_media_active;
512 }
513
514 /*
515  *      Set hardware to newly-selected media.
516  */
517 static int
518 jme_mediachange(struct ifnet *ifp)
519 {
520         struct jme_softc *sc = ifp->if_softc;
521         struct mii_data *mii = device_get_softc(sc->jme_miibus);
522         int error;
523
524         ASSERT_IFNET_SERIALIZED_ALL(ifp);
525
526         if (mii->mii_instance != 0) {
527                 struct mii_softc *miisc;
528
529                 LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
530                         mii_phy_reset(miisc);
531         }
532         error = mii_mediachg(mii);
533
534         return (error);
535 }
536
537 static int
538 jme_probe(device_t dev)
539 {
540         const struct jme_dev *sp;
541         uint16_t vid, did;
542
543         vid = pci_get_vendor(dev);
544         did = pci_get_device(dev);
545         for (sp = jme_devs; sp->jme_name != NULL; ++sp) {
546                 if (vid == sp->jme_vendorid && did == sp->jme_deviceid) {
547                         struct jme_softc *sc = device_get_softc(dev);
548
549                         sc->jme_caps = sp->jme_caps;
550                         device_set_desc(dev, sp->jme_name);
551                         return (0);
552                 }
553         }
554         return (ENXIO);
555 }
556
557 static int
558 jme_eeprom_read_byte(struct jme_softc *sc, uint8_t addr, uint8_t *val)
559 {
560         uint32_t reg;
561         int i;
562
563         *val = 0;
564         for (i = JME_TIMEOUT; i > 0; i--) {
565                 reg = CSR_READ_4(sc, JME_SMBCSR);
566                 if ((reg & SMBCSR_HW_BUSY_MASK) == SMBCSR_HW_IDLE)
567                         break;
568                 DELAY(1);
569         }
570
571         if (i == 0) {
572                 device_printf(sc->jme_dev, "EEPROM idle timeout!\n");
573                 return (ETIMEDOUT);
574         }
575
576         reg = ((uint32_t)addr << SMBINTF_ADDR_SHIFT) & SMBINTF_ADDR_MASK;
577         CSR_WRITE_4(sc, JME_SMBINTF, reg | SMBINTF_RD | SMBINTF_CMD_TRIGGER);
578         for (i = JME_TIMEOUT; i > 0; i--) {
579                 DELAY(1);
580                 reg = CSR_READ_4(sc, JME_SMBINTF);
581                 if ((reg & SMBINTF_CMD_TRIGGER) == 0)
582                         break;
583         }
584
585         if (i == 0) {
586                 device_printf(sc->jme_dev, "EEPROM read timeout!\n");
587                 return (ETIMEDOUT);
588         }
589
590         reg = CSR_READ_4(sc, JME_SMBINTF);
591         *val = (reg & SMBINTF_RD_DATA_MASK) >> SMBINTF_RD_DATA_SHIFT;
592
593         return (0);
594 }
595
596 static int
597 jme_eeprom_macaddr(struct jme_softc *sc, uint8_t eaddr[])
598 {
599         uint8_t fup, reg, val;
600         uint32_t offset;
601         int match;
602
603         offset = 0;
604         if (jme_eeprom_read_byte(sc, offset++, &fup) != 0 ||
605             fup != JME_EEPROM_SIG0)
606                 return (ENOENT);
607         if (jme_eeprom_read_byte(sc, offset++, &fup) != 0 ||
608             fup != JME_EEPROM_SIG1)
609                 return (ENOENT);
610         match = 0;
611         do {
612                 if (jme_eeprom_read_byte(sc, offset, &fup) != 0)
613                         break;
614                 if (JME_EEPROM_MKDESC(JME_EEPROM_FUNC0, JME_EEPROM_PAGE_BAR1) ==
615                     (fup & (JME_EEPROM_FUNC_MASK | JME_EEPROM_PAGE_MASK))) {
616                         if (jme_eeprom_read_byte(sc, offset + 1, &reg) != 0)
617                                 break;
618                         if (reg >= JME_PAR0 &&
619                             reg < JME_PAR0 + ETHER_ADDR_LEN) {
620                                 if (jme_eeprom_read_byte(sc, offset + 2,
621                                     &val) != 0)
622                                         break;
623                                 eaddr[reg - JME_PAR0] = val;
624                                 match++;
625                         }
626                 }
627                 /* Check for the end of EEPROM descriptor. */
628                 if ((fup & JME_EEPROM_DESC_END) == JME_EEPROM_DESC_END)
629                         break;
630                 /* Try next eeprom descriptor. */
631                 offset += JME_EEPROM_DESC_BYTES;
632         } while (match != ETHER_ADDR_LEN && offset < JME_EEPROM_END);
633
634         if (match == ETHER_ADDR_LEN)
635                 return (0);
636
637         return (ENOENT);
638 }
639
640 static void
641 jme_reg_macaddr(struct jme_softc *sc, uint8_t eaddr[])
642 {
643         uint32_t par0, par1;
644
645         /* Read station address. */
646         par0 = CSR_READ_4(sc, JME_PAR0);
647         par1 = CSR_READ_4(sc, JME_PAR1);
648         par1 &= 0xFFFF;
649         if ((par0 == 0 && par1 == 0) || (par0 & 0x1)) {
650                 device_printf(sc->jme_dev,
651                     "generating fake ethernet address.\n");
652                 par0 = karc4random();
653                 /* Set OUI to JMicron. */
654                 eaddr[0] = 0x00;
655                 eaddr[1] = 0x1B;
656                 eaddr[2] = 0x8C;
657                 eaddr[3] = (par0 >> 16) & 0xff;
658                 eaddr[4] = (par0 >> 8) & 0xff;
659                 eaddr[5] = par0 & 0xff;
660         } else {
661                 eaddr[0] = (par0 >> 0) & 0xFF;
662                 eaddr[1] = (par0 >> 8) & 0xFF;
663                 eaddr[2] = (par0 >> 16) & 0xFF;
664                 eaddr[3] = (par0 >> 24) & 0xFF;
665                 eaddr[4] = (par1 >> 0) & 0xFF;
666                 eaddr[5] = (par1 >> 8) & 0xFF;
667         }
668 }
669
670 static int
671 jme_attach(device_t dev)
672 {
673         struct jme_softc *sc = device_get_softc(dev);
674         struct ifnet *ifp = &sc->arpcom.ac_if;
675         uint32_t reg;
676         uint16_t did;
677         uint8_t pcie_ptr, rev;
678         int error = 0, i, j, rx_desc_cnt, coal_max;
679         uint8_t eaddr[ETHER_ADDR_LEN];
680 #ifdef IFPOLL_ENABLE
681         int offset, offset_def;
682 #endif
683
684         /*
685          * Initialize serializers
686          */
687         lwkt_serialize_init(&sc->jme_serialize);
688         lwkt_serialize_init(&sc->jme_cdata.jme_tx_data.jme_tx_serialize);
689         for (i = 0; i < JME_NRXRING_MAX; ++i) {
690                 lwkt_serialize_init(
691                     &sc->jme_cdata.jme_rx_data[i].jme_rx_serialize);
692         }
693
694         /*
695          * Get # of RX ring descriptors
696          */
697         rx_desc_cnt = device_getenv_int(dev, "rx_desc_count",
698             jme_rx_desc_count);
699         rx_desc_cnt = roundup(rx_desc_cnt, JME_NDESC_ALIGN);
700         if (rx_desc_cnt > JME_NDESC_MAX)
701                 rx_desc_cnt = JME_NDESC_MAX;
702
703         /*
704          * Get # of TX ring descriptors
705          */
706         sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt =
707             device_getenv_int(dev, "tx_desc_count", jme_tx_desc_count);
708         sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt =
709             roundup(sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt, JME_NDESC_ALIGN);
710         if (sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt > JME_NDESC_MAX)
711                 sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt = JME_NDESC_MAX;
712
713         /*
714          * Get # of RX rings
715          */
716         sc->jme_cdata.jme_rx_ring_cnt = device_getenv_int(dev, "rx_ring_count",
717             jme_rx_ring_count);
718         sc->jme_cdata.jme_rx_ring_cnt =
719             if_ring_count2(sc->jme_cdata.jme_rx_ring_cnt, JME_NRXRING_MAX);
720
721         /*
722          * Initialize serializer array
723          */
724         i = 0;
725         sc->jme_serialize_arr[i++] = &sc->jme_serialize;
726
727         KKASSERT(i == JME_TX_SERIALIZE);
728         sc->jme_serialize_arr[i++] =
729             &sc->jme_cdata.jme_tx_data.jme_tx_serialize;
730
731         KKASSERT(i == JME_RX_SERIALIZE);
732         for (j = 0; j < sc->jme_cdata.jme_rx_ring_cnt; ++j) {
733                 sc->jme_serialize_arr[i++] =
734                     &sc->jme_cdata.jme_rx_data[j].jme_rx_serialize;
735         }
736         KKASSERT(i <= JME_NSERIALIZE);
737         sc->jme_serialize_cnt = i;
738
739         /*
740          * Setup TX ring specific data
741          */
742         sc->jme_cdata.jme_tx_data.jme_sc = sc;
743
744         /*
745          * Setup RX rings specific data
746          */
747         for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
748                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[i];
749
750                 rdata->jme_sc = sc;
751                 rdata->jme_rx_coal = jme_rx_status[i].jme_coal;
752                 rdata->jme_rx_comp = jme_rx_status[i].jme_comp;
753                 rdata->jme_rx_empty = jme_rx_status[i].jme_empty;
754                 rdata->jme_rx_idx = i;
755                 rdata->jme_rx_desc_cnt = rx_desc_cnt;
756         }
757
758         sc->jme_dev = dev;
759         sc->jme_lowaddr = BUS_SPACE_MAXADDR;
760
761         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
762
763         callout_init(&sc->jme_tick_ch);
764
765 #ifndef BURN_BRIDGES
766         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
767                 uint32_t irq, mem;
768
769                 irq = pci_read_config(dev, PCIR_INTLINE, 4);
770                 mem = pci_read_config(dev, JME_PCIR_BAR, 4);
771
772                 device_printf(dev, "chip is in D%d power mode "
773                     "-- setting to D0\n", pci_get_powerstate(dev));
774
775                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
776
777                 pci_write_config(dev, PCIR_INTLINE, irq, 4);
778                 pci_write_config(dev, JME_PCIR_BAR, mem, 4);
779         }
780 #endif  /* !BURN_BRIDGE */
781
782         /* Enable bus mastering */
783         pci_enable_busmaster(dev);
784
785         /*
786          * Allocate IO memory
787          *
788          * JMC250 supports both memory mapped and I/O register space
789          * access.  Because I/O register access should use different
790          * BARs to access registers it's waste of time to use I/O
791          * register spce access.  JMC250 uses 16K to map entire memory
792          * space.
793          */
794         sc->jme_mem_rid = JME_PCIR_BAR;
795         sc->jme_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
796                                                  &sc->jme_mem_rid, RF_ACTIVE);
797         if (sc->jme_mem_res == NULL) {
798                 device_printf(dev, "can't allocate IO memory\n");
799                 return ENXIO;
800         }
801         sc->jme_mem_bt = rman_get_bustag(sc->jme_mem_res);
802         sc->jme_mem_bh = rman_get_bushandle(sc->jme_mem_res);
803
804         /*
805          * Allocate IRQ
806          */
807         error = jme_intr_alloc(dev);
808         if (error)
809                 goto fail;
810
811         /*
812          * Extract revisions
813          */
814         reg = CSR_READ_4(sc, JME_CHIPMODE);
815         if (((reg & CHIPMODE_FPGA_REV_MASK) >> CHIPMODE_FPGA_REV_SHIFT) !=
816             CHIPMODE_NOT_FPGA) {
817                 sc->jme_caps |= JME_CAP_FPGA;
818                 if (bootverbose) {
819                         device_printf(dev, "FPGA revision: 0x%04x\n",
820                                       (reg & CHIPMODE_FPGA_REV_MASK) >>
821                                       CHIPMODE_FPGA_REV_SHIFT);
822                 }
823         }
824
825         /* NOTE: FM revision is put in the upper 4 bits */
826         rev = ((reg & CHIPMODE_REVFM_MASK) >> CHIPMODE_REVFM_SHIFT) << 4;
827         rev |= (reg & CHIPMODE_REVECO_MASK) >> CHIPMODE_REVECO_SHIFT;
828         if (bootverbose)
829                 device_printf(dev, "Revision (FM/ECO): 0x%02x\n", rev);
830
831         did = pci_get_device(dev);
832         switch (did) {
833         case PCI_PRODUCT_JMICRON_JMC250:
834                 if (rev == JME_REV1_A2)
835                         sc->jme_workaround |= JME_WA_EXTFIFO | JME_WA_HDX;
836                 break;
837
838         case PCI_PRODUCT_JMICRON_JMC260:
839                 if (rev == JME_REV2)
840                         sc->jme_lowaddr = BUS_SPACE_MAXADDR_32BIT;
841                 break;
842
843         default:
844                 panic("unknown device id 0x%04x", did);
845         }
846         if (rev >= JME_REV2) {
847                 sc->jme_clksrc = GHC_TXOFL_CLKSRC | GHC_TXMAC_CLKSRC;
848                 sc->jme_clksrc_1000 = GHC_TXOFL_CLKSRC_1000 |
849                                       GHC_TXMAC_CLKSRC_1000;
850         }
851
852         /* Reset the ethernet controller. */
853         jme_reset(sc);
854
855         /* Map MSI/MSI-X vectors */
856         jme_set_msinum(sc);
857
858         /* Get station address. */
859         reg = CSR_READ_4(sc, JME_SMBCSR);
860         if (reg & SMBCSR_EEPROM_PRESENT)
861                 error = jme_eeprom_macaddr(sc, eaddr);
862         if (error != 0 || (reg & SMBCSR_EEPROM_PRESENT) == 0) {
863                 if (error != 0 && (bootverbose)) {
864                         device_printf(dev, "ethernet hardware address "
865                                       "not found in EEPROM.\n");
866                 }
867                 jme_reg_macaddr(sc, eaddr);
868         }
869
870         /*
871          * Save PHY address.
872          * Integrated JR0211 has fixed PHY address whereas FPGA version
873          * requires PHY probing to get correct PHY address.
874          */
875         if ((sc->jme_caps & JME_CAP_FPGA) == 0) {
876                 sc->jme_phyaddr = CSR_READ_4(sc, JME_GPREG0) &
877                     GPREG0_PHY_ADDR_MASK;
878                 if (bootverbose) {
879                         device_printf(dev, "PHY is at address %d.\n",
880                             sc->jme_phyaddr);
881                 }
882         } else {
883                 sc->jme_phyaddr = 0;
884         }
885
886         /* Set max allowable DMA size. */
887         pcie_ptr = pci_get_pciecap_ptr(dev);
888         if (pcie_ptr != 0) {
889                 uint16_t ctrl;
890
891                 sc->jme_caps |= JME_CAP_PCIE;
892                 ctrl = pci_read_config(dev, pcie_ptr + PCIER_DEVCTRL, 2);
893                 if (bootverbose) {
894                         device_printf(dev, "Read request size : %d bytes.\n",
895                             128 << ((ctrl >> 12) & 0x07));
896                         device_printf(dev, "TLP payload size : %d bytes.\n",
897                             128 << ((ctrl >> 5) & 0x07));
898                 }
899                 switch (ctrl & PCIEM_DEVCTL_MAX_READRQ_MASK) {
900                 case PCIEM_DEVCTL_MAX_READRQ_128:
901                         sc->jme_tx_dma_size = TXCSR_DMA_SIZE_128;
902                         break;
903                 case PCIEM_DEVCTL_MAX_READRQ_256:
904                         sc->jme_tx_dma_size = TXCSR_DMA_SIZE_256;
905                         break;
906                 default:
907                         sc->jme_tx_dma_size = TXCSR_DMA_SIZE_512;
908                         break;
909                 }
910                 sc->jme_rx_dma_size = RXCSR_DMA_SIZE_128;
911         } else {
912                 sc->jme_tx_dma_size = TXCSR_DMA_SIZE_512;
913                 sc->jme_rx_dma_size = RXCSR_DMA_SIZE_128;
914         }
915
916 #ifdef notyet
917         if (pci_find_extcap(dev, PCIY_PMG, &pmc) == 0)
918                 sc->jme_caps |= JME_CAP_PMCAP;
919 #endif
920
921 #ifdef IFPOLL_ENABLE
922         /*
923          * NPOLLING RX CPU offset
924          */
925         if (sc->jme_cdata.jme_rx_ring_cnt == ncpus2) {
926                 offset = 0;
927         } else {
928                 offset_def = (sc->jme_cdata.jme_rx_ring_cnt *
929                     device_get_unit(dev)) % ncpus2;
930                 offset = device_getenv_int(dev, "npoll.rxoff", offset_def);
931                 if (offset >= ncpus2 ||
932                     offset % sc->jme_cdata.jme_rx_ring_cnt != 0) {
933                         device_printf(dev, "invalid npoll.rxoff %d, use %d\n",
934                             offset, offset_def);
935                         offset = offset_def;
936                 }
937         }
938         sc->jme_npoll_rxoff = offset;
939
940         /*
941          * NPOLLING TX CPU offset
942          */
943         offset_def = sc->jme_npoll_rxoff;
944         offset = device_getenv_int(dev, "npoll.txoff", offset_def);
945         if (offset >= ncpus2) {
946                 device_printf(dev, "invalid npoll.txoff %d, use %d\n",
947                     offset, offset_def);
948                 offset = offset_def;
949         }
950         sc->jme_npoll_txoff = offset;
951 #endif
952
953         /*
954          * Set default coalesce valves
955          */
956         sc->jme_tx_coal_to = PCCTX_COAL_TO_DEFAULT;
957         sc->jme_tx_coal_pkt = PCCTX_COAL_PKT_DEFAULT;
958         sc->jme_rx_coal_to = PCCRX_COAL_TO_DEFAULT;
959         sc->jme_rx_coal_pkt = PCCRX_COAL_PKT_DEFAULT;
960
961         /*
962          * Adjust coalesce valves, in case that the number of TX/RX
963          * descs are set to small values by users.
964          *
965          * NOTE: coal_max will not be zero, since number of descs
966          * must aligned by JME_NDESC_ALIGN (16 currently)
967          */
968         coal_max = sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt / 2;
969         if (coal_max < sc->jme_tx_coal_pkt)
970                 sc->jme_tx_coal_pkt = coal_max;
971
972         coal_max = sc->jme_cdata.jme_rx_data[0].jme_rx_desc_cnt / 2;
973         if (coal_max < sc->jme_rx_coal_pkt)
974                 sc->jme_rx_coal_pkt = coal_max;
975
976         sc->jme_cdata.jme_tx_data.jme_tx_wreg = JME_TXWREG_NSEGS;
977
978         /*
979          * Create sysctl tree
980          */
981         jme_sysctl_node(sc);
982
983         /* Allocate DMA stuffs */
984         error = jme_dma_alloc(sc);
985         if (error)
986                 goto fail;
987
988         ifp->if_softc = sc;
989         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
990         ifp->if_init = jme_init;
991         ifp->if_ioctl = jme_ioctl;
992         ifp->if_start = jme_start;
993 #ifdef IFPOLL_ENABLE
994         ifp->if_npoll = jme_npoll;
995 #endif
996         ifp->if_watchdog = jme_watchdog;
997         ifp->if_serialize = jme_serialize;
998         ifp->if_deserialize = jme_deserialize;
999         ifp->if_tryserialize = jme_tryserialize;
1000 #ifdef INVARIANTS
1001         ifp->if_serialize_assert = jme_serialize_assert;
1002 #endif
1003         ifq_set_maxlen(&ifp->if_snd,
1004             sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt - JME_TXD_RSVD);
1005         ifq_set_ready(&ifp->if_snd);
1006
1007         /* JMC250 supports Tx/Rx checksum offload and hardware vlan tagging. */
1008         ifp->if_capabilities = IFCAP_HWCSUM |
1009                                IFCAP_TSO |
1010                                IFCAP_VLAN_MTU |
1011                                IFCAP_VLAN_HWTAGGING;
1012         if (sc->jme_cdata.jme_rx_ring_cnt > JME_NRXRING_MIN)
1013                 ifp->if_capabilities |= IFCAP_RSS;
1014         ifp->if_capenable = ifp->if_capabilities;
1015
1016         /*
1017          * Disable TXCSUM by default to improve bulk data
1018          * transmit performance (+20Mbps improvement).
1019          */
1020         ifp->if_capenable &= ~IFCAP_TXCSUM;
1021
1022         if (ifp->if_capenable & IFCAP_TXCSUM)
1023                 ifp->if_hwassist |= JME_CSUM_FEATURES;
1024         ifp->if_hwassist |= CSUM_TSO;
1025
1026         /* Set up MII bus. */
1027         error = mii_phy_probe(dev, &sc->jme_miibus,
1028                               jme_mediachange, jme_mediastatus);
1029         if (error) {
1030                 device_printf(dev, "no PHY found!\n");
1031                 goto fail;
1032         }
1033
1034         /*
1035          * Save PHYADDR for FPGA mode PHY.
1036          */
1037         if (sc->jme_caps & JME_CAP_FPGA) {
1038                 struct mii_data *mii = device_get_softc(sc->jme_miibus);
1039
1040                 if (mii->mii_instance != 0) {
1041                         struct mii_softc *miisc;
1042
1043                         LIST_FOREACH(miisc, &mii->mii_phys, mii_list) {
1044                                 if (miisc->mii_phy != 0) {
1045                                         sc->jme_phyaddr = miisc->mii_phy;
1046                                         break;
1047                                 }
1048                         }
1049                         if (sc->jme_phyaddr != 0) {
1050                                 device_printf(sc->jme_dev,
1051                                     "FPGA PHY is at %d\n", sc->jme_phyaddr);
1052                                 /* vendor magic. */
1053                                 jme_miibus_writereg(dev, sc->jme_phyaddr,
1054                                     JMPHY_CONF, JMPHY_CONF_DEFFIFO);
1055
1056                                 /* XXX should we clear JME_WA_EXTFIFO */
1057                         }
1058                 }
1059         }
1060
1061         ether_ifattach(ifp, eaddr, NULL);
1062
1063         /* Tell the upper layer(s) we support long frames. */
1064         ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
1065
1066         error = jme_intr_setup(dev);
1067         if (error) {
1068                 ether_ifdetach(ifp);
1069                 goto fail;
1070         }
1071         ifq_set_cpuid(&ifp->if_snd, sc->jme_tx_cpuid);
1072
1073         return 0;
1074 fail:
1075         jme_detach(dev);
1076         return (error);
1077 }
1078
1079 static int
1080 jme_detach(device_t dev)
1081 {
1082         struct jme_softc *sc = device_get_softc(dev);
1083
1084         if (device_is_attached(dev)) {
1085                 struct ifnet *ifp = &sc->arpcom.ac_if;
1086
1087                 ifnet_serialize_all(ifp);
1088                 jme_stop(sc);
1089                 jme_intr_teardown(dev);
1090                 ifnet_deserialize_all(ifp);
1091
1092                 ether_ifdetach(ifp);
1093         }
1094
1095         if (sc->jme_sysctl_tree != NULL)
1096                 sysctl_ctx_free(&sc->jme_sysctl_ctx);
1097
1098         if (sc->jme_miibus != NULL)
1099                 device_delete_child(dev, sc->jme_miibus);
1100         bus_generic_detach(dev);
1101
1102         jme_intr_free(dev);
1103
1104         if (sc->jme_mem_res != NULL) {
1105                 bus_release_resource(dev, SYS_RES_MEMORY, sc->jme_mem_rid,
1106                                      sc->jme_mem_res);
1107         }
1108
1109         jme_dma_free(sc);
1110
1111         return (0);
1112 }
1113
1114 static void
1115 jme_sysctl_node(struct jme_softc *sc)
1116 {
1117 #ifdef JME_RSS_DEBUG
1118         int r;
1119 #endif
1120
1121         sysctl_ctx_init(&sc->jme_sysctl_ctx);
1122         sc->jme_sysctl_tree = SYSCTL_ADD_NODE(&sc->jme_sysctl_ctx,
1123                                 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
1124                                 device_get_nameunit(sc->jme_dev),
1125                                 CTLFLAG_RD, 0, "");
1126         if (sc->jme_sysctl_tree == NULL) {
1127                 device_printf(sc->jme_dev, "can't add sysctl node\n");
1128                 return;
1129         }
1130
1131         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1132             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1133             "tx_coal_to", CTLTYPE_INT | CTLFLAG_RW,
1134             sc, 0, jme_sysctl_tx_coal_to, "I", "jme tx coalescing timeout");
1135
1136         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1137             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1138             "tx_coal_pkt", CTLTYPE_INT | CTLFLAG_RW,
1139             sc, 0, jme_sysctl_tx_coal_pkt, "I", "jme tx coalescing packet");
1140
1141         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1142             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1143             "rx_coal_to", CTLTYPE_INT | CTLFLAG_RW,
1144             sc, 0, jme_sysctl_rx_coal_to, "I", "jme rx coalescing timeout");
1145
1146         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1147             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1148             "rx_coal_pkt", CTLTYPE_INT | CTLFLAG_RW,
1149             sc, 0, jme_sysctl_rx_coal_pkt, "I", "jme rx coalescing packet");
1150
1151         SYSCTL_ADD_INT(&sc->jme_sysctl_ctx,
1152                        SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1153                        "rx_desc_count", CTLFLAG_RD,
1154                        &sc->jme_cdata.jme_rx_data[0].jme_rx_desc_cnt,
1155                        0, "RX desc count");
1156         SYSCTL_ADD_INT(&sc->jme_sysctl_ctx,
1157                        SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1158                        "tx_desc_count", CTLFLAG_RD,
1159                        &sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt,
1160                        0, "TX desc count");
1161         SYSCTL_ADD_INT(&sc->jme_sysctl_ctx,
1162                        SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1163                        "rx_ring_count", CTLFLAG_RD,
1164                        &sc->jme_cdata.jme_rx_ring_cnt,
1165                        0, "RX ring count");
1166         SYSCTL_ADD_INT(&sc->jme_sysctl_ctx,
1167                        SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1168                        "tx_wreg", CTLFLAG_RW,
1169                        &sc->jme_cdata.jme_tx_data.jme_tx_wreg, 0,
1170                        "# of segments before writing to hardware register");
1171
1172 #ifdef JME_RSS_DEBUG
1173         SYSCTL_ADD_INT(&sc->jme_sysctl_ctx,
1174                        SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1175                        "rss_debug", CTLFLAG_RW, &sc->jme_rss_debug,
1176                        0, "RSS debug level");
1177         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
1178                 char rx_ring_desc[32];
1179
1180                 ksnprintf(rx_ring_desc, sizeof(rx_ring_desc),
1181                     "rx_ring%d_pkt", r);
1182                 SYSCTL_ADD_ULONG(&sc->jme_sysctl_ctx,
1183                     SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1184                     rx_ring_desc, CTLFLAG_RW,
1185                     &sc->jme_cdata.jme_rx_data[r].jme_rx_pkt, "RXed packets");
1186
1187                 ksnprintf(rx_ring_desc, sizeof(rx_ring_desc),
1188                     "rx_ring%d_emp", r);
1189                 SYSCTL_ADD_ULONG(&sc->jme_sysctl_ctx,
1190                     SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1191                     rx_ring_desc, CTLFLAG_RW,
1192                     &sc->jme_cdata.jme_rx_data[r].jme_rx_emp,
1193                     "# of time RX ring empty");
1194         }
1195 #endif
1196
1197 #ifdef IFPOLL_ENABLE
1198         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1199             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1200             "npoll_rxoff", CTLTYPE_INT|CTLFLAG_RW, sc, 0,
1201             jme_sysctl_npoll_rxoff, "I", "NPOLLING RX cpu offset");
1202         SYSCTL_ADD_PROC(&sc->jme_sysctl_ctx,
1203             SYSCTL_CHILDREN(sc->jme_sysctl_tree), OID_AUTO,
1204             "npoll_txoff", CTLTYPE_INT|CTLFLAG_RW, sc, 0,
1205             jme_sysctl_npoll_txoff, "I", "NPOLLING TX cpu offset");
1206 #endif
1207 }
1208
1209 static int
1210 jme_dma_alloc(struct jme_softc *sc)
1211 {
1212         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
1213         struct jme_txdesc *txd;
1214         bus_dmamem_t dmem;
1215         int error, i, asize;
1216
1217         asize = __VM_CACHELINE_ALIGN(
1218             tdata->jme_tx_desc_cnt * sizeof(struct jme_txdesc));
1219         tdata->jme_txdesc = kmalloc_cachealign(asize, M_DEVBUF,
1220             M_WAITOK | M_ZERO);
1221
1222         for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
1223                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[i];
1224
1225                 asize = __VM_CACHELINE_ALIGN(
1226                     rdata->jme_rx_desc_cnt * sizeof(struct jme_rxdesc));
1227                 rdata->jme_rxdesc = kmalloc_cachealign(asize, M_DEVBUF,
1228                     M_WAITOK | M_ZERO);
1229         }
1230
1231         /* Create parent ring tag. */
1232         error = bus_dma_tag_create(NULL,/* parent */
1233             1, JME_RING_BOUNDARY,       /* algnmnt, boundary */
1234             sc->jme_lowaddr,            /* lowaddr */
1235             BUS_SPACE_MAXADDR,          /* highaddr */
1236             NULL, NULL,                 /* filter, filterarg */
1237             BUS_SPACE_MAXSIZE_32BIT,    /* maxsize */
1238             0,                          /* nsegments */
1239             BUS_SPACE_MAXSIZE_32BIT,    /* maxsegsize */
1240             0,                          /* flags */
1241             &sc->jme_cdata.jme_ring_tag);
1242         if (error) {
1243                 device_printf(sc->jme_dev,
1244                     "could not create parent ring DMA tag.\n");
1245                 return error;
1246         }
1247
1248         /*
1249          * Create DMA stuffs for TX ring
1250          */
1251         asize = roundup2(JME_TX_RING_SIZE(tdata), JME_TX_RING_ALIGN);
1252         error = bus_dmamem_coherent(sc->jme_cdata.jme_ring_tag,
1253                         JME_TX_RING_ALIGN, 0,
1254                         BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1255                         asize, BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem);
1256         if (error) {
1257                 device_printf(sc->jme_dev, "could not allocate Tx ring.\n");
1258                 return error;
1259         }
1260         tdata->jme_tx_ring_tag = dmem.dmem_tag;
1261         tdata->jme_tx_ring_map = dmem.dmem_map;
1262         tdata->jme_tx_ring = dmem.dmem_addr;
1263         tdata->jme_tx_ring_paddr = dmem.dmem_busaddr;
1264
1265         /*
1266          * Create DMA stuffs for RX rings
1267          */
1268         for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
1269                 error = jme_rxring_dma_alloc(&sc->jme_cdata.jme_rx_data[i]);
1270                 if (error)
1271                         return error;
1272         }
1273
1274         /* Create parent buffer tag. */
1275         error = bus_dma_tag_create(NULL,/* parent */
1276             1, 0,                       /* algnmnt, boundary */
1277             sc->jme_lowaddr,            /* lowaddr */
1278             BUS_SPACE_MAXADDR,          /* highaddr */
1279             NULL, NULL,                 /* filter, filterarg */
1280             BUS_SPACE_MAXSIZE_32BIT,    /* maxsize */
1281             0,                          /* nsegments */
1282             BUS_SPACE_MAXSIZE_32BIT,    /* maxsegsize */
1283             0,                          /* flags */
1284             &sc->jme_cdata.jme_buffer_tag);
1285         if (error) {
1286                 device_printf(sc->jme_dev,
1287                     "could not create parent buffer DMA tag.\n");
1288                 return error;
1289         }
1290
1291         /*
1292          * Create DMA stuffs for shadow status block
1293          */
1294         asize = roundup2(JME_SSB_SIZE, JME_SSB_ALIGN);
1295         error = bus_dmamem_coherent(sc->jme_cdata.jme_buffer_tag,
1296                         JME_SSB_ALIGN, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1297                         asize, BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem);
1298         if (error) {
1299                 device_printf(sc->jme_dev,
1300                     "could not create shadow status block.\n");
1301                 return error;
1302         }
1303         sc->jme_cdata.jme_ssb_tag = dmem.dmem_tag;
1304         sc->jme_cdata.jme_ssb_map = dmem.dmem_map;
1305         sc->jme_cdata.jme_ssb_block = dmem.dmem_addr;
1306         sc->jme_cdata.jme_ssb_block_paddr = dmem.dmem_busaddr;
1307
1308         /*
1309          * Create DMA stuffs for TX buffers
1310          */
1311
1312         /* Create tag for Tx buffers. */
1313         error = bus_dma_tag_create(sc->jme_cdata.jme_buffer_tag,/* parent */
1314             1, 0,                       /* algnmnt, boundary */
1315             BUS_SPACE_MAXADDR,          /* lowaddr */
1316             BUS_SPACE_MAXADDR,          /* highaddr */
1317             NULL, NULL,                 /* filter, filterarg */
1318             JME_TSO_MAXSIZE,            /* maxsize */
1319             JME_MAXTXSEGS,              /* nsegments */
1320             JME_MAXSEGSIZE,             /* maxsegsize */
1321             BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,/* flags */
1322             &tdata->jme_tx_tag);
1323         if (error != 0) {
1324                 device_printf(sc->jme_dev, "could not create Tx DMA tag.\n");
1325                 return error;
1326         }
1327
1328         /* Create DMA maps for Tx buffers. */
1329         for (i = 0; i < tdata->jme_tx_desc_cnt; i++) {
1330                 txd = &tdata->jme_txdesc[i];
1331                 error = bus_dmamap_create(tdata->jme_tx_tag,
1332                                 BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,
1333                                 &txd->tx_dmamap);
1334                 if (error) {
1335                         int j;
1336
1337                         device_printf(sc->jme_dev,
1338                             "could not create %dth Tx dmamap.\n", i);
1339
1340                         for (j = 0; j < i; ++j) {
1341                                 txd = &tdata->jme_txdesc[j];
1342                                 bus_dmamap_destroy(tdata->jme_tx_tag,
1343                                                    txd->tx_dmamap);
1344                         }
1345                         bus_dma_tag_destroy(tdata->jme_tx_tag);
1346                         tdata->jme_tx_tag = NULL;
1347                         return error;
1348                 }
1349         }
1350
1351         /*
1352          * Create DMA stuffs for RX buffers
1353          */
1354         for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
1355                 error = jme_rxbuf_dma_alloc(&sc->jme_cdata.jme_rx_data[i]);
1356                 if (error)
1357                         return error;
1358         }
1359         return 0;
1360 }
1361
1362 static void
1363 jme_dma_free(struct jme_softc *sc)
1364 {
1365         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
1366         struct jme_txdesc *txd;
1367         struct jme_rxdesc *rxd;
1368         struct jme_rxdata *rdata;
1369         int i, r;
1370
1371         /* Tx ring */
1372         if (tdata->jme_tx_ring_tag != NULL) {
1373                 bus_dmamap_unload(tdata->jme_tx_ring_tag,
1374                     tdata->jme_tx_ring_map);
1375                 bus_dmamem_free(tdata->jme_tx_ring_tag,
1376                     tdata->jme_tx_ring, tdata->jme_tx_ring_map);
1377                 bus_dma_tag_destroy(tdata->jme_tx_ring_tag);
1378                 tdata->jme_tx_ring_tag = NULL;
1379         }
1380
1381         /* Rx ring */
1382         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
1383                 rdata = &sc->jme_cdata.jme_rx_data[r];
1384                 if (rdata->jme_rx_ring_tag != NULL) {
1385                         bus_dmamap_unload(rdata->jme_rx_ring_tag,
1386                                           rdata->jme_rx_ring_map);
1387                         bus_dmamem_free(rdata->jme_rx_ring_tag,
1388                                         rdata->jme_rx_ring,
1389                                         rdata->jme_rx_ring_map);
1390                         bus_dma_tag_destroy(rdata->jme_rx_ring_tag);
1391                         rdata->jme_rx_ring_tag = NULL;
1392                 }
1393         }
1394
1395         /* Tx buffers */
1396         if (tdata->jme_tx_tag != NULL) {
1397                 for (i = 0; i < tdata->jme_tx_desc_cnt; i++) {
1398                         txd = &tdata->jme_txdesc[i];
1399                         bus_dmamap_destroy(tdata->jme_tx_tag, txd->tx_dmamap);
1400                 }
1401                 bus_dma_tag_destroy(tdata->jme_tx_tag);
1402                 tdata->jme_tx_tag = NULL;
1403         }
1404
1405         /* Rx buffers */
1406         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
1407                 rdata = &sc->jme_cdata.jme_rx_data[r];
1408                 if (rdata->jme_rx_tag != NULL) {
1409                         for (i = 0; i < rdata->jme_rx_desc_cnt; i++) {
1410                                 rxd = &rdata->jme_rxdesc[i];
1411                                 bus_dmamap_destroy(rdata->jme_rx_tag,
1412                                                    rxd->rx_dmamap);
1413                         }
1414                         bus_dmamap_destroy(rdata->jme_rx_tag,
1415                                            rdata->jme_rx_sparemap);
1416                         bus_dma_tag_destroy(rdata->jme_rx_tag);
1417                         rdata->jme_rx_tag = NULL;
1418                 }
1419         }
1420
1421         /* Shadow status block. */
1422         if (sc->jme_cdata.jme_ssb_tag != NULL) {
1423                 bus_dmamap_unload(sc->jme_cdata.jme_ssb_tag,
1424                     sc->jme_cdata.jme_ssb_map);
1425                 bus_dmamem_free(sc->jme_cdata.jme_ssb_tag,
1426                     sc->jme_cdata.jme_ssb_block,
1427                     sc->jme_cdata.jme_ssb_map);
1428                 bus_dma_tag_destroy(sc->jme_cdata.jme_ssb_tag);
1429                 sc->jme_cdata.jme_ssb_tag = NULL;
1430         }
1431
1432         if (sc->jme_cdata.jme_buffer_tag != NULL) {
1433                 bus_dma_tag_destroy(sc->jme_cdata.jme_buffer_tag);
1434                 sc->jme_cdata.jme_buffer_tag = NULL;
1435         }
1436         if (sc->jme_cdata.jme_ring_tag != NULL) {
1437                 bus_dma_tag_destroy(sc->jme_cdata.jme_ring_tag);
1438                 sc->jme_cdata.jme_ring_tag = NULL;
1439         }
1440
1441         if (tdata->jme_txdesc != NULL) {
1442                 kfree(tdata->jme_txdesc, M_DEVBUF);
1443                 tdata->jme_txdesc = NULL;
1444         }
1445         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
1446                 rdata = &sc->jme_cdata.jme_rx_data[r];
1447                 if (rdata->jme_rxdesc != NULL) {
1448                         kfree(rdata->jme_rxdesc, M_DEVBUF);
1449                         rdata->jme_rxdesc = NULL;
1450                 }
1451         }
1452 }
1453
1454 /*
1455  *      Make sure the interface is stopped at reboot time.
1456  */
1457 static int
1458 jme_shutdown(device_t dev)
1459 {
1460         return jme_suspend(dev);
1461 }
1462
1463 #ifdef notyet
1464 /*
1465  * Unlike other ethernet controllers, JMC250 requires
1466  * explicit resetting link speed to 10/100Mbps as gigabit
1467  * link will cunsume more power than 375mA.
1468  * Note, we reset the link speed to 10/100Mbps with
1469  * auto-negotiation but we don't know whether that operation
1470  * would succeed or not as we have no control after powering
1471  * off. If the renegotiation fail WOL may not work. Running
1472  * at 1Gbps draws more power than 375mA at 3.3V which is
1473  * specified in PCI specification and that would result in
1474  * complete shutdowning power to ethernet controller.
1475  *
1476  * TODO
1477  *  Save current negotiated media speed/duplex/flow-control
1478  *  to softc and restore the same link again after resuming.
1479  *  PHY handling such as power down/resetting to 100Mbps
1480  *  may be better handled in suspend method in phy driver.
1481  */
1482 static void
1483 jme_setlinkspeed(struct jme_softc *sc)
1484 {
1485         struct mii_data *mii;
1486         int aneg, i;
1487
1488         JME_LOCK_ASSERT(sc);
1489
1490         mii = device_get_softc(sc->jme_miibus);
1491         mii_pollstat(mii);
1492         aneg = 0;
1493         if ((mii->mii_media_status & IFM_AVALID) != 0) {
1494                 switch IFM_SUBTYPE(mii->mii_media_active) {
1495                 case IFM_10_T:
1496                 case IFM_100_TX:
1497                         return;
1498                 case IFM_1000_T:
1499                         aneg++;
1500                 default:
1501                         break;
1502                 }
1503         }
1504         jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr, MII_100T2CR, 0);
1505         jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr, MII_ANAR,
1506             ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10 | ANAR_CSMA);
1507         jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr, MII_BMCR,
1508             BMCR_AUTOEN | BMCR_STARTNEG);
1509         DELAY(1000);
1510         if (aneg != 0) {
1511                 /* Poll link state until jme(4) get a 10/100 link. */
1512                 for (i = 0; i < MII_ANEGTICKS_GIGE; i++) {
1513                         mii_pollstat(mii);
1514                         if ((mii->mii_media_status & IFM_AVALID) != 0) {
1515                                 switch (IFM_SUBTYPE(mii->mii_media_active)) {
1516                                 case IFM_10_T:
1517                                 case IFM_100_TX:
1518                                         jme_mac_config(sc);
1519                                         return;
1520                                 default:
1521                                         break;
1522                                 }
1523                         }
1524                         JME_UNLOCK(sc);
1525                         pause("jmelnk", hz);
1526                         JME_LOCK(sc);
1527                 }
1528                 if (i == MII_ANEGTICKS_GIGE)
1529                         device_printf(sc->jme_dev, "establishing link failed, "
1530                             "WOL may not work!");
1531         }
1532         /*
1533          * No link, force MAC to have 100Mbps, full-duplex link.
1534          * This is the last resort and may/may not work.
1535          */
1536         mii->mii_media_status = IFM_AVALID | IFM_ACTIVE;
1537         mii->mii_media_active = IFM_ETHER | IFM_100_TX | IFM_FDX;
1538         jme_mac_config(sc);
1539 }
1540
1541 static void
1542 jme_setwol(struct jme_softc *sc)
1543 {
1544         struct ifnet *ifp = &sc->arpcom.ac_if;
1545         uint32_t gpr, pmcs;
1546         uint16_t pmstat;
1547         int pmc;
1548
1549         if (pci_find_extcap(sc->jme_dev, PCIY_PMG, &pmc) != 0) {
1550                 /* No PME capability, PHY power down. */
1551                 jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr,
1552                     MII_BMCR, BMCR_PDOWN);
1553                 return;
1554         }
1555
1556         gpr = CSR_READ_4(sc, JME_GPREG0) & ~GPREG0_PME_ENB;
1557         pmcs = CSR_READ_4(sc, JME_PMCS);
1558         pmcs &= ~PMCS_WOL_ENB_MASK;
1559         if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0) {
1560                 pmcs |= PMCS_MAGIC_FRAME | PMCS_MAGIC_FRAME_ENB;
1561                 /* Enable PME message. */
1562                 gpr |= GPREG0_PME_ENB;
1563                 /* For gigabit controllers, reset link speed to 10/100. */
1564                 if ((sc->jme_caps & JME_CAP_FASTETH) == 0)
1565                         jme_setlinkspeed(sc);
1566         }
1567
1568         CSR_WRITE_4(sc, JME_PMCS, pmcs);
1569         CSR_WRITE_4(sc, JME_GPREG0, gpr);
1570
1571         /* Request PME. */
1572         pmstat = pci_read_config(sc->jme_dev, pmc + PCIR_POWER_STATUS, 2);
1573         pmstat &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE);
1574         if ((ifp->if_capenable & IFCAP_WOL) != 0)
1575                 pmstat |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE;
1576         pci_write_config(sc->jme_dev, pmc + PCIR_POWER_STATUS, pmstat, 2);
1577         if ((ifp->if_capenable & IFCAP_WOL) == 0) {
1578                 /* No WOL, PHY power down. */
1579                 jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr,
1580                     MII_BMCR, BMCR_PDOWN);
1581         }
1582 }
1583 #endif
1584
1585 static int
1586 jme_suspend(device_t dev)
1587 {
1588         struct jme_softc *sc = device_get_softc(dev);
1589         struct ifnet *ifp = &sc->arpcom.ac_if;
1590
1591         ifnet_serialize_all(ifp);
1592         jme_stop(sc);
1593 #ifdef notyet
1594         jme_setwol(sc);
1595 #endif
1596         ifnet_deserialize_all(ifp);
1597
1598         return (0);
1599 }
1600
1601 static int
1602 jme_resume(device_t dev)
1603 {
1604         struct jme_softc *sc = device_get_softc(dev);
1605         struct ifnet *ifp = &sc->arpcom.ac_if;
1606 #ifdef notyet
1607         int pmc;
1608 #endif
1609
1610         ifnet_serialize_all(ifp);
1611
1612 #ifdef notyet
1613         if (pci_find_extcap(sc->jme_dev, PCIY_PMG, &pmc) != 0) {
1614                 uint16_t pmstat;
1615
1616                 pmstat = pci_read_config(sc->jme_dev,
1617                     pmc + PCIR_POWER_STATUS, 2);
1618                 /* Disable PME clear PME status. */
1619                 pmstat &= ~PCIM_PSTAT_PMEENABLE;
1620                 pci_write_config(sc->jme_dev,
1621                     pmc + PCIR_POWER_STATUS, pmstat, 2);
1622         }
1623 #endif
1624
1625         if (ifp->if_flags & IFF_UP)
1626                 jme_init(sc);
1627
1628         ifnet_deserialize_all(ifp);
1629
1630         return (0);
1631 }
1632
1633 static __inline int
1634 jme_tso_pullup(struct mbuf **mp)
1635 {
1636         int hoff, iphlen, thoff;
1637         struct mbuf *m;
1638
1639         m = *mp;
1640         KASSERT(M_WRITABLE(m), ("TSO mbuf not writable"));
1641
1642         iphlen = m->m_pkthdr.csum_iphlen;
1643         thoff = m->m_pkthdr.csum_thlen;
1644         hoff = m->m_pkthdr.csum_lhlen;
1645
1646         KASSERT(iphlen > 0, ("invalid ip hlen"));
1647         KASSERT(thoff > 0, ("invalid tcp hlen"));
1648         KASSERT(hoff > 0, ("invalid ether hlen"));
1649
1650         if (__predict_false(m->m_len < hoff + iphlen + thoff)) {
1651                 m = m_pullup(m, hoff + iphlen + thoff);
1652                 if (m == NULL) {
1653                         *mp = NULL;
1654                         return ENOBUFS;
1655                 }
1656                 *mp = m;
1657         }
1658         return 0;
1659 }
1660
1661 static int
1662 jme_encap(struct jme_txdata *tdata, struct mbuf **m_head, int *segs_used)
1663 {
1664         struct jme_txdesc *txd;
1665         struct jme_desc *desc;
1666         struct mbuf *m;
1667         bus_dma_segment_t txsegs[JME_MAXTXSEGS];
1668         int maxsegs, nsegs;
1669         int error, i, prod, symbol_desc;
1670         uint32_t cflags, flag64, mss;
1671
1672         M_ASSERTPKTHDR((*m_head));
1673
1674         if ((*m_head)->m_pkthdr.csum_flags & CSUM_TSO) {
1675                 /* XXX Is this necessary? */
1676                 error = jme_tso_pullup(m_head);
1677                 if (error)
1678                         return error;
1679         }
1680
1681         prod = tdata->jme_tx_prod;
1682         txd = &tdata->jme_txdesc[prod];
1683
1684         if (tdata->jme_sc->jme_lowaddr != BUS_SPACE_MAXADDR_32BIT)
1685                 symbol_desc = 1;
1686         else
1687                 symbol_desc = 0;
1688
1689         maxsegs = (tdata->jme_tx_desc_cnt - tdata->jme_tx_cnt) -
1690                   (JME_TXD_RSVD + symbol_desc);
1691         if (maxsegs > JME_MAXTXSEGS)
1692                 maxsegs = JME_MAXTXSEGS;
1693         KASSERT(maxsegs >= (JME_TXD_SPARE - symbol_desc),
1694                 ("not enough segments %d", maxsegs));
1695
1696         error = bus_dmamap_load_mbuf_defrag(tdata->jme_tx_tag,
1697                         txd->tx_dmamap, m_head,
1698                         txsegs, maxsegs, &nsegs, BUS_DMA_NOWAIT);
1699         if (error)
1700                 goto fail;
1701         *segs_used += nsegs;
1702
1703         bus_dmamap_sync(tdata->jme_tx_tag, txd->tx_dmamap,
1704                         BUS_DMASYNC_PREWRITE);
1705
1706         m = *m_head;
1707         cflags = 0;
1708         mss = 0;
1709
1710         /* Configure checksum offload. */
1711         if (m->m_pkthdr.csum_flags & CSUM_TSO) {
1712                 mss = (uint32_t)m->m_pkthdr.tso_segsz << JME_TD_MSS_SHIFT;
1713                 cflags |= JME_TD_TSO;
1714         } else if (m->m_pkthdr.csum_flags & JME_CSUM_FEATURES) {
1715                 if (m->m_pkthdr.csum_flags & CSUM_IP)
1716                         cflags |= JME_TD_IPCSUM;
1717                 if (m->m_pkthdr.csum_flags & CSUM_TCP)
1718                         cflags |= JME_TD_TCPCSUM;
1719                 if (m->m_pkthdr.csum_flags & CSUM_UDP)
1720                         cflags |= JME_TD_UDPCSUM;
1721         }
1722
1723         /* Configure VLAN. */
1724         if (m->m_flags & M_VLANTAG) {
1725                 cflags |= (m->m_pkthdr.ether_vlantag & JME_TD_VLAN_MASK);
1726                 cflags |= JME_TD_VLAN_TAG;
1727         }
1728
1729         desc = &tdata->jme_tx_ring[prod];
1730         desc->flags = htole32(cflags);
1731         desc->addr_hi = htole32(m->m_pkthdr.len);
1732         if (tdata->jme_sc->jme_lowaddr != BUS_SPACE_MAXADDR_32BIT) {
1733                 /*
1734                  * Use 64bits TX desc chain format.
1735                  *
1736                  * The first TX desc of the chain, which is setup here,
1737                  * is just a symbol TX desc carrying no payload.
1738                  */
1739                 flag64 = JME_TD_64BIT;
1740                 desc->buflen = htole32(mss);
1741                 desc->addr_lo = 0;
1742
1743                 *segs_used += 1;
1744
1745                 /* No effective TX desc is consumed */
1746                 i = 0;
1747         } else {
1748                 /*
1749                  * Use 32bits TX desc chain format.
1750                  *
1751                  * The first TX desc of the chain, which is setup here,
1752                  * is an effective TX desc carrying the first segment of
1753                  * the mbuf chain.
1754                  */
1755                 flag64 = 0;
1756                 desc->buflen = htole32(mss | txsegs[0].ds_len);
1757                 desc->addr_lo = htole32(JME_ADDR_LO(txsegs[0].ds_addr));
1758
1759                 /* One effective TX desc is consumed */
1760                 i = 1;
1761         }
1762         tdata->jme_tx_cnt++;
1763         KKASSERT(tdata->jme_tx_cnt - i < tdata->jme_tx_desc_cnt - JME_TXD_RSVD);
1764         JME_DESC_INC(prod, tdata->jme_tx_desc_cnt);
1765
1766         txd->tx_ndesc = 1 - i;
1767         for (; i < nsegs; i++) {
1768                 desc = &tdata->jme_tx_ring[prod];
1769                 desc->buflen = htole32(txsegs[i].ds_len);
1770                 desc->addr_hi = htole32(JME_ADDR_HI(txsegs[i].ds_addr));
1771                 desc->addr_lo = htole32(JME_ADDR_LO(txsegs[i].ds_addr));
1772                 desc->flags = htole32(JME_TD_OWN | flag64);
1773
1774                 tdata->jme_tx_cnt++;
1775                 KKASSERT(tdata->jme_tx_cnt <=
1776                          tdata->jme_tx_desc_cnt - JME_TXD_RSVD);
1777                 JME_DESC_INC(prod, tdata->jme_tx_desc_cnt);
1778         }
1779
1780         /* Update producer index. */
1781         tdata->jme_tx_prod = prod;
1782         /*
1783          * Finally request interrupt and give the first descriptor
1784          * owenership to hardware.
1785          */
1786         desc = txd->tx_desc;
1787         desc->flags |= htole32(JME_TD_OWN | JME_TD_INTR);
1788
1789         txd->tx_m = m;
1790         txd->tx_ndesc += nsegs;
1791
1792         return 0;
1793 fail:
1794         m_freem(*m_head);
1795         *m_head = NULL;
1796         return error;
1797 }
1798
1799 static void
1800 jme_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
1801 {
1802         struct jme_softc *sc = ifp->if_softc;
1803         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
1804         struct mbuf *m_head;
1805         int enq = 0;
1806
1807         ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
1808         ASSERT_SERIALIZED(&tdata->jme_tx_serialize);
1809
1810         if (!sc->jme_has_link) {
1811                 ifq_purge(&ifp->if_snd);
1812                 return;
1813         }
1814
1815         if ((ifp->if_flags & IFF_RUNNING) == 0 || ifq_is_oactive(&ifp->if_snd))
1816                 return;
1817
1818         if (tdata->jme_tx_cnt >= JME_TX_DESC_HIWAT(tdata))
1819                 jme_txeof(tdata);
1820
1821         while (!ifq_is_empty(&ifp->if_snd)) {
1822                 /*
1823                  * Check number of available TX descs, always
1824                  * leave JME_TXD_RSVD free TX descs.
1825                  */
1826                 if (tdata->jme_tx_cnt + JME_TXD_SPARE >
1827                     tdata->jme_tx_desc_cnt - JME_TXD_RSVD) {
1828                         ifq_set_oactive(&ifp->if_snd);
1829                         break;
1830                 }
1831
1832                 m_head = ifq_dequeue(&ifp->if_snd, NULL);
1833                 if (m_head == NULL)
1834                         break;
1835
1836                 /*
1837                  * Pack the data into the transmit ring. If we
1838                  * don't have room, set the OACTIVE flag and wait
1839                  * for the NIC to drain the ring.
1840                  */
1841                 if (jme_encap(tdata, &m_head, &enq)) {
1842                         KKASSERT(m_head == NULL);
1843                         IFNET_STAT_INC(ifp, oerrors, 1);
1844                         ifq_set_oactive(&ifp->if_snd);
1845                         break;
1846                 }
1847
1848                 if (enq >= tdata->jme_tx_wreg) {
1849                         CSR_WRITE_4(sc, JME_TXCSR, sc->jme_txcsr |
1850                             TXCSR_TX_ENB | TXCSR_TXQ_N_START(TXCSR_TXQ0));
1851                         enq = 0;
1852                 }
1853
1854                 /*
1855                  * If there's a BPF listener, bounce a copy of this frame
1856                  * to him.
1857                  */
1858                 ETHER_BPF_MTAP(ifp, m_head);
1859
1860                 /* Set a timeout in case the chip goes out to lunch. */
1861                 ifp->if_timer = JME_TX_TIMEOUT;
1862         }
1863
1864         if (enq > 0) {
1865                 /*
1866                  * Reading TXCSR takes very long time under heavy load
1867                  * so cache TXCSR value and writes the ORed value with
1868                  * the kick command to the TXCSR. This saves one register
1869                  * access cycle.
1870                  */
1871                 CSR_WRITE_4(sc, JME_TXCSR, sc->jme_txcsr | TXCSR_TX_ENB |
1872                     TXCSR_TXQ_N_START(TXCSR_TXQ0));
1873         }
1874 }
1875
1876 static void
1877 jme_watchdog(struct ifnet *ifp)
1878 {
1879         struct jme_softc *sc = ifp->if_softc;
1880         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
1881
1882         ASSERT_IFNET_SERIALIZED_ALL(ifp);
1883
1884         if (!sc->jme_has_link) {
1885                 if_printf(ifp, "watchdog timeout (missed link)\n");
1886                 IFNET_STAT_INC(ifp, oerrors, 1);
1887                 jme_init(sc);
1888                 return;
1889         }
1890
1891         jme_txeof(tdata);
1892         if (tdata->jme_tx_cnt == 0) {
1893                 if_printf(ifp, "watchdog timeout (missed Tx interrupts) "
1894                           "-- recovering\n");
1895                 if (!ifq_is_empty(&ifp->if_snd))
1896                         if_devstart(ifp);
1897                 return;
1898         }
1899
1900         if_printf(ifp, "watchdog timeout\n");
1901         IFNET_STAT_INC(ifp, oerrors, 1);
1902         jme_init(sc);
1903         if (!ifq_is_empty(&ifp->if_snd))
1904                 if_devstart(ifp);
1905 }
1906
1907 static int
1908 jme_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1909 {
1910         struct jme_softc *sc = ifp->if_softc;
1911         struct mii_data *mii = device_get_softc(sc->jme_miibus);
1912         struct ifreq *ifr = (struct ifreq *)data;
1913         int error = 0, mask;
1914
1915         ASSERT_IFNET_SERIALIZED_ALL(ifp);
1916
1917         switch (cmd) {
1918         case SIOCSIFMTU:
1919                 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > JME_JUMBO_MTU ||
1920                     (!(sc->jme_caps & JME_CAP_JUMBO) &&
1921                      ifr->ifr_mtu > JME_MAX_MTU)) {
1922                         error = EINVAL;
1923                         break;
1924                 }
1925
1926                 if (ifp->if_mtu != ifr->ifr_mtu) {
1927                         /*
1928                          * No special configuration is required when interface
1929                          * MTU is changed but availability of Tx checksum
1930                          * offload should be chcked against new MTU size as
1931                          * FIFO size is just 2K.
1932                          */
1933                         if (ifr->ifr_mtu >= JME_TX_FIFO_SIZE) {
1934                                 ifp->if_capenable &=
1935                                     ~(IFCAP_TXCSUM | IFCAP_TSO);
1936                                 ifp->if_hwassist &=
1937                                     ~(JME_CSUM_FEATURES | CSUM_TSO);
1938                         }
1939                         ifp->if_mtu = ifr->ifr_mtu;
1940                         if (ifp->if_flags & IFF_RUNNING)
1941                                 jme_init(sc);
1942                 }
1943                 break;
1944
1945         case SIOCSIFFLAGS:
1946                 if (ifp->if_flags & IFF_UP) {
1947                         if (ifp->if_flags & IFF_RUNNING) {
1948                                 if ((ifp->if_flags ^ sc->jme_if_flags) &
1949                                     (IFF_PROMISC | IFF_ALLMULTI))
1950                                         jme_set_filter(sc);
1951                         } else {
1952                                 jme_init(sc);
1953                         }
1954                 } else {
1955                         if (ifp->if_flags & IFF_RUNNING)
1956                                 jme_stop(sc);
1957                 }
1958                 sc->jme_if_flags = ifp->if_flags;
1959                 break;
1960
1961         case SIOCADDMULTI:
1962         case SIOCDELMULTI:
1963                 if (ifp->if_flags & IFF_RUNNING)
1964                         jme_set_filter(sc);
1965                 break;
1966
1967         case SIOCSIFMEDIA:
1968         case SIOCGIFMEDIA:
1969                 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
1970                 break;
1971
1972         case SIOCSIFCAP:
1973                 mask = ifr->ifr_reqcap ^ ifp->if_capenable;
1974
1975                 if ((mask & IFCAP_TXCSUM) && ifp->if_mtu < JME_TX_FIFO_SIZE) {
1976                         ifp->if_capenable ^= IFCAP_TXCSUM;
1977                         if (ifp->if_capenable & IFCAP_TXCSUM)
1978                                 ifp->if_hwassist |= JME_CSUM_FEATURES;
1979                         else
1980                                 ifp->if_hwassist &= ~JME_CSUM_FEATURES;
1981                 }
1982                 if (mask & IFCAP_RXCSUM) {
1983                         uint32_t reg;
1984
1985                         ifp->if_capenable ^= IFCAP_RXCSUM;
1986                         reg = CSR_READ_4(sc, JME_RXMAC);
1987                         reg &= ~RXMAC_CSUM_ENB;
1988                         if (ifp->if_capenable & IFCAP_RXCSUM)
1989                                 reg |= RXMAC_CSUM_ENB;
1990                         CSR_WRITE_4(sc, JME_RXMAC, reg);
1991                 }
1992
1993                 if (mask & IFCAP_VLAN_HWTAGGING) {
1994                         ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
1995                         jme_set_vlan(sc);
1996                 }
1997
1998                 if ((mask & IFCAP_TSO) && ifp->if_mtu < JME_TX_FIFO_SIZE) {
1999                         ifp->if_capenable ^= IFCAP_TSO;
2000                         if (ifp->if_capenable & IFCAP_TSO)
2001                                 ifp->if_hwassist |= CSUM_TSO;
2002                         else
2003                                 ifp->if_hwassist &= ~CSUM_TSO;
2004                 }
2005
2006                 if (mask & IFCAP_RSS)
2007                         ifp->if_capenable ^= IFCAP_RSS;
2008                 break;
2009
2010         default:
2011                 error = ether_ioctl(ifp, cmd, data);
2012                 break;
2013         }
2014         return (error);
2015 }
2016
2017 static void
2018 jme_mac_config(struct jme_softc *sc)
2019 {
2020         struct mii_data *mii;
2021         uint32_t ghc, rxmac, txmac, txpause, gp1;
2022         int phyconf = JMPHY_CONF_DEFFIFO, hdx = 0;
2023
2024         mii = device_get_softc(sc->jme_miibus);
2025
2026         CSR_WRITE_4(sc, JME_GHC, GHC_RESET);
2027         DELAY(10);
2028         CSR_WRITE_4(sc, JME_GHC, 0);
2029         ghc = 0;
2030         rxmac = CSR_READ_4(sc, JME_RXMAC);
2031         rxmac &= ~RXMAC_FC_ENB;
2032         txmac = CSR_READ_4(sc, JME_TXMAC);
2033         txmac &= ~(TXMAC_CARRIER_EXT | TXMAC_FRAME_BURST);
2034         txpause = CSR_READ_4(sc, JME_TXPFC);
2035         txpause &= ~TXPFC_PAUSE_ENB;
2036         if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
2037                 ghc |= GHC_FULL_DUPLEX;
2038                 rxmac &= ~RXMAC_COLL_DET_ENB;
2039                 txmac &= ~(TXMAC_COLL_ENB | TXMAC_CARRIER_SENSE |
2040                     TXMAC_BACKOFF | TXMAC_CARRIER_EXT |
2041                     TXMAC_FRAME_BURST);
2042 #ifdef notyet
2043                 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0)
2044                         txpause |= TXPFC_PAUSE_ENB;
2045                 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0)
2046                         rxmac |= RXMAC_FC_ENB;
2047 #endif
2048                 /* Disable retry transmit timer/retry limit. */
2049                 CSR_WRITE_4(sc, JME_TXTRHD, CSR_READ_4(sc, JME_TXTRHD) &
2050                     ~(TXTRHD_RT_PERIOD_ENB | TXTRHD_RT_LIMIT_ENB));
2051         } else {
2052                 rxmac |= RXMAC_COLL_DET_ENB;
2053                 txmac |= TXMAC_COLL_ENB | TXMAC_CARRIER_SENSE | TXMAC_BACKOFF;
2054                 /* Enable retry transmit timer/retry limit. */
2055                 CSR_WRITE_4(sc, JME_TXTRHD, CSR_READ_4(sc, JME_TXTRHD) |
2056                     TXTRHD_RT_PERIOD_ENB | TXTRHD_RT_LIMIT_ENB);
2057         }
2058
2059         /*
2060          * Reprogram Tx/Rx MACs with resolved speed/duplex.
2061          */
2062         gp1 = CSR_READ_4(sc, JME_GPREG1);
2063         gp1 &= ~GPREG1_WA_HDX;
2064
2065         if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) == 0)
2066                 hdx = 1;
2067
2068         switch (IFM_SUBTYPE(mii->mii_media_active)) {
2069         case IFM_10_T:
2070                 ghc |= GHC_SPEED_10 | sc->jme_clksrc;
2071                 if (hdx)
2072                         gp1 |= GPREG1_WA_HDX;
2073                 break;
2074
2075         case IFM_100_TX:
2076                 ghc |= GHC_SPEED_100 | sc->jme_clksrc;
2077                 if (hdx)
2078                         gp1 |= GPREG1_WA_HDX;
2079
2080                 /*
2081                  * Use extended FIFO depth to workaround CRC errors
2082                  * emitted by chips before JMC250B
2083                  */
2084                 phyconf = JMPHY_CONF_EXTFIFO;
2085                 break;
2086
2087         case IFM_1000_T:
2088                 if (sc->jme_caps & JME_CAP_FASTETH)
2089                         break;
2090
2091                 ghc |= GHC_SPEED_1000 | sc->jme_clksrc_1000;
2092                 if (hdx)
2093                         txmac |= TXMAC_CARRIER_EXT | TXMAC_FRAME_BURST;
2094                 break;
2095
2096         default:
2097                 break;
2098         }
2099         CSR_WRITE_4(sc, JME_GHC, ghc);
2100         CSR_WRITE_4(sc, JME_RXMAC, rxmac);
2101         CSR_WRITE_4(sc, JME_TXMAC, txmac);
2102         CSR_WRITE_4(sc, JME_TXPFC, txpause);
2103
2104         if (sc->jme_workaround & JME_WA_EXTFIFO) {
2105                 jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr,
2106                                     JMPHY_CONF, phyconf);
2107         }
2108         if (sc->jme_workaround & JME_WA_HDX)
2109                 CSR_WRITE_4(sc, JME_GPREG1, gp1);
2110 }
2111
2112 static void
2113 jme_intr(void *xsc)
2114 {
2115         struct jme_softc *sc = xsc;
2116         struct ifnet *ifp = &sc->arpcom.ac_if;
2117         uint32_t status;
2118         int r;
2119
2120         ASSERT_SERIALIZED(&sc->jme_serialize);
2121
2122         status = CSR_READ_4(sc, JME_INTR_REQ_STATUS);
2123         if (status == 0 || status == 0xFFFFFFFF)
2124                 return;
2125
2126         /* Disable interrupts. */
2127         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, JME_INTRS);
2128
2129         status = CSR_READ_4(sc, JME_INTR_STATUS);
2130         if ((status & JME_INTRS) == 0 || status == 0xFFFFFFFF)
2131                 goto back;
2132
2133         /* Reset PCC counter/timer and Ack interrupts. */
2134         status &= ~(INTR_TXQ_COMP | INTR_RXQ_COMP);
2135
2136         if (status & (INTR_TXQ_COAL | INTR_TXQ_COAL_TO))
2137                 status |= INTR_TXQ_COAL | INTR_TXQ_COAL_TO | INTR_TXQ_COMP;
2138
2139         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
2140                 if (status & jme_rx_status[r].jme_coal) {
2141                         status |= jme_rx_status[r].jme_coal |
2142                                   jme_rx_status[r].jme_comp;
2143                 }
2144         }
2145
2146         CSR_WRITE_4(sc, JME_INTR_STATUS, status);
2147
2148         if (ifp->if_flags & IFF_RUNNING) {
2149                 struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
2150
2151                 if (status & (INTR_RXQ_COAL | INTR_RXQ_COAL_TO))
2152                         jme_rx_intr(sc, status);
2153
2154                 if (status & INTR_RXQ_DESC_EMPTY) {
2155                         /*
2156                          * Notify hardware availability of new Rx buffers.
2157                          * Reading RXCSR takes very long time under heavy
2158                          * load so cache RXCSR value and writes the ORed
2159                          * value with the kick command to the RXCSR. This
2160                          * saves one register access cycle.
2161                          */
2162                         CSR_WRITE_4(sc, JME_RXCSR, sc->jme_rxcsr |
2163                             RXCSR_RX_ENB | RXCSR_RXQ_START);
2164                 }
2165
2166                 if (status & (INTR_TXQ_COAL | INTR_TXQ_COAL_TO)) {
2167                         lwkt_serialize_enter(&tdata->jme_tx_serialize);
2168                         jme_txeof(tdata);
2169                         if (!ifq_is_empty(&ifp->if_snd))
2170                                 if_devstart(ifp);
2171                         lwkt_serialize_exit(&tdata->jme_tx_serialize);
2172                 }
2173         }
2174 back:
2175         /* Reenable interrupts. */
2176         CSR_WRITE_4(sc, JME_INTR_MASK_SET, JME_INTRS);
2177 }
2178
2179 static void
2180 jme_txeof(struct jme_txdata *tdata)
2181 {
2182         struct ifnet *ifp = &tdata->jme_sc->arpcom.ac_if;
2183         int cons;
2184
2185         cons = tdata->jme_tx_cons;
2186         if (cons == tdata->jme_tx_prod)
2187                 return;
2188
2189         /*
2190          * Go through our Tx list and free mbufs for those
2191          * frames which have been transmitted.
2192          */
2193         while (cons != tdata->jme_tx_prod) {
2194                 struct jme_txdesc *txd, *next_txd;
2195                 uint32_t status, next_status;
2196                 int next_cons, nsegs;
2197
2198                 txd = &tdata->jme_txdesc[cons];
2199                 KASSERT(txd->tx_m != NULL,
2200                         ("%s: freeing NULL mbuf!", __func__));
2201
2202                 status = le32toh(txd->tx_desc->flags);
2203                 if ((status & JME_TD_OWN) == JME_TD_OWN)
2204                         break;
2205
2206                 /*
2207                  * NOTE:
2208                  * This chip will always update the TX descriptor's
2209                  * buflen field and this updating always happens
2210                  * after clearing the OWN bit, so even if the OWN
2211                  * bit is cleared by the chip, we still don't sure
2212                  * about whether the buflen field has been updated
2213                  * by the chip or not.  To avoid this race, we wait
2214                  * for the next TX descriptor's OWN bit to be cleared
2215                  * by the chip before reusing this TX descriptor.
2216                  */
2217                 next_cons = cons;
2218                 JME_DESC_ADD(next_cons, txd->tx_ndesc, tdata->jme_tx_desc_cnt);
2219                 next_txd = &tdata->jme_txdesc[next_cons];
2220                 if (next_txd->tx_m == NULL)
2221                         break;
2222                 next_status = le32toh(next_txd->tx_desc->flags);
2223                 if ((next_status & JME_TD_OWN) == JME_TD_OWN)
2224                         break;
2225
2226                 if (status & (JME_TD_TMOUT | JME_TD_RETRY_EXP)) {
2227                         IFNET_STAT_INC(ifp, oerrors, 1);
2228                 } else {
2229                         IFNET_STAT_INC(ifp, opackets, 1);
2230                         if (status & JME_TD_COLLISION) {
2231                                 IFNET_STAT_INC(ifp, collisions,
2232                                     le32toh(txd->tx_desc->buflen) &
2233                                     JME_TD_BUF_LEN_MASK);
2234                         }
2235                 }
2236
2237                 /*
2238                  * Only the first descriptor of multi-descriptor
2239                  * transmission is updated so driver have to skip entire
2240                  * chained buffers for the transmiited frame. In other
2241                  * words, JME_TD_OWN bit is valid only at the first
2242                  * descriptor of a multi-descriptor transmission.
2243                  */
2244                 for (nsegs = 0; nsegs < txd->tx_ndesc; nsegs++) {
2245                         tdata->jme_tx_ring[cons].flags = 0;
2246                         JME_DESC_INC(cons, tdata->jme_tx_desc_cnt);
2247                 }
2248
2249                 /* Reclaim transferred mbufs. */
2250                 bus_dmamap_unload(tdata->jme_tx_tag, txd->tx_dmamap);
2251                 m_freem(txd->tx_m);
2252                 txd->tx_m = NULL;
2253                 tdata->jme_tx_cnt -= txd->tx_ndesc;
2254                 KASSERT(tdata->jme_tx_cnt >= 0,
2255                         ("%s: Active Tx desc counter was garbled", __func__));
2256                 txd->tx_ndesc = 0;
2257         }
2258         tdata->jme_tx_cons = cons;
2259
2260         /* 1 for symbol TX descriptor */
2261         if (tdata->jme_tx_cnt <= JME_MAXTXSEGS + 1)
2262                 ifp->if_timer = 0;
2263
2264         if (tdata->jme_tx_cnt + JME_TXD_SPARE <=
2265             tdata->jme_tx_desc_cnt - JME_TXD_RSVD)
2266                 ifq_clr_oactive(&ifp->if_snd);
2267 }
2268
2269 static __inline void
2270 jme_discard_rxbufs(struct jme_rxdata *rdata, int cons, int count)
2271 {
2272         int i;
2273
2274         for (i = 0; i < count; ++i) {
2275                 jme_setup_rxdesc(&rdata->jme_rxdesc[cons]);
2276                 JME_DESC_INC(cons, rdata->jme_rx_desc_cnt);
2277         }
2278 }
2279
2280 static __inline struct pktinfo *
2281 jme_pktinfo(struct pktinfo *pi, uint32_t flags)
2282 {
2283         if (flags & JME_RD_IPV4)
2284                 pi->pi_netisr = NETISR_IP;
2285         else if (flags & JME_RD_IPV6)
2286                 pi->pi_netisr = NETISR_IPV6;
2287         else
2288                 return NULL;
2289
2290         pi->pi_flags = 0;
2291         pi->pi_l3proto = IPPROTO_UNKNOWN;
2292
2293         if (flags & JME_RD_MORE_FRAG)
2294                 pi->pi_flags |= PKTINFO_FLAG_FRAG;
2295         else if (flags & JME_RD_TCP)
2296                 pi->pi_l3proto = IPPROTO_TCP;
2297         else if (flags & JME_RD_UDP)
2298                 pi->pi_l3proto = IPPROTO_UDP;
2299         else
2300                 pi = NULL;
2301         return pi;
2302 }
2303
2304 /* Receive a frame. */
2305 static void
2306 jme_rxpkt(struct jme_rxdata *rdata)
2307 {
2308         struct ifnet *ifp = &rdata->jme_sc->arpcom.ac_if;
2309         struct jme_desc *desc;
2310         struct jme_rxdesc *rxd;
2311         struct mbuf *mp, *m;
2312         uint32_t flags, status, hash, hashinfo;
2313         int cons, count, nsegs;
2314
2315         cons = rdata->jme_rx_cons;
2316         desc = &rdata->jme_rx_ring[cons];
2317
2318         flags = le32toh(desc->flags);
2319         status = le32toh(desc->buflen);
2320         hash = le32toh(desc->addr_hi);
2321         hashinfo = le32toh(desc->addr_lo);
2322         nsegs = JME_RX_NSEGS(status);
2323
2324         if (nsegs > 1) {
2325                 /* Skip the first descriptor. */
2326                 JME_DESC_INC(cons, rdata->jme_rx_desc_cnt);
2327
2328                 /*
2329                  * Clear the OWN bit of the following RX descriptors;
2330                  * hardware will not clear the OWN bit except the first
2331                  * RX descriptor.
2332                  *
2333                  * Since the first RX descriptor is setup, i.e. OWN bit
2334                  * on, before its followins RX descriptors, leaving the
2335                  * OWN bit on the following RX descriptors will trick
2336                  * the hardware into thinking that the following RX
2337                  * descriptors are ready to be used too.
2338                  */
2339                 for (count = 1; count < nsegs; count++,
2340                      JME_DESC_INC(cons, rdata->jme_rx_desc_cnt))
2341                         rdata->jme_rx_ring[cons].flags = 0;
2342
2343                 cons = rdata->jme_rx_cons;
2344         }
2345
2346         JME_RSS_DPRINTF(rdata->jme_sc, 15, "ring%d, flags 0x%08x, "
2347                         "hash 0x%08x, hash info 0x%08x\n",
2348                         rdata->jme_rx_idx, flags, hash, hashinfo);
2349
2350         if (status & JME_RX_ERR_STAT) {
2351                 IFNET_STAT_INC(ifp, ierrors, 1);
2352                 jme_discard_rxbufs(rdata, cons, nsegs);
2353 #ifdef JME_SHOW_ERRORS
2354                 if_printf(ifp, "%s : receive error = 0x%b\n",
2355                     __func__, JME_RX_ERR(status), JME_RX_ERR_BITS);
2356 #endif
2357                 rdata->jme_rx_cons += nsegs;
2358                 rdata->jme_rx_cons %= rdata->jme_rx_desc_cnt;
2359                 return;
2360         }
2361
2362         rdata->jme_rxlen = JME_RX_BYTES(status) - JME_RX_PAD_BYTES;
2363         for (count = 0; count < nsegs; count++,
2364              JME_DESC_INC(cons, rdata->jme_rx_desc_cnt)) {
2365                 rxd = &rdata->jme_rxdesc[cons];
2366                 mp = rxd->rx_m;
2367
2368                 /* Add a new receive buffer to the ring. */
2369                 if (jme_newbuf(rdata, rxd, 0) != 0) {
2370                         IFNET_STAT_INC(ifp, iqdrops, 1);
2371                         /* Reuse buffer. */
2372                         jme_discard_rxbufs(rdata, cons, nsegs - count);
2373                         if (rdata->jme_rxhead != NULL) {
2374                                 m_freem(rdata->jme_rxhead);
2375                                 JME_RXCHAIN_RESET(rdata);
2376                         }
2377                         break;
2378                 }
2379
2380                 /*
2381                  * Assume we've received a full sized frame.
2382                  * Actual size is fixed when we encounter the end of
2383                  * multi-segmented frame.
2384                  */
2385                 mp->m_len = MCLBYTES;
2386
2387                 /* Chain received mbufs. */
2388                 if (rdata->jme_rxhead == NULL) {
2389                         rdata->jme_rxhead = mp;
2390                         rdata->jme_rxtail = mp;
2391                 } else {
2392                         /*
2393                          * Receive processor can receive a maximum frame
2394                          * size of 65535 bytes.
2395                          */
2396                         rdata->jme_rxtail->m_next = mp;
2397                         rdata->jme_rxtail = mp;
2398                 }
2399
2400                 if (count == nsegs - 1) {
2401                         struct pktinfo pi0, *pi;
2402
2403                         /* Last desc. for this frame. */
2404                         m = rdata->jme_rxhead;
2405                         m->m_pkthdr.len = rdata->jme_rxlen;
2406                         if (nsegs > 1) {
2407                                 /* Set first mbuf size. */
2408                                 m->m_len = MCLBYTES - JME_RX_PAD_BYTES;
2409                                 /* Set last mbuf size. */
2410                                 mp->m_len = rdata->jme_rxlen -
2411                                     ((MCLBYTES - JME_RX_PAD_BYTES) +
2412                                     (MCLBYTES * (nsegs - 2)));
2413                         } else {
2414                                 m->m_len = rdata->jme_rxlen;
2415                         }
2416                         m->m_pkthdr.rcvif = ifp;
2417
2418                         /*
2419                          * Account for 10bytes auto padding which is used
2420                          * to align IP header on 32bit boundary. Also note,
2421                          * CRC bytes is automatically removed by the
2422                          * hardware.
2423                          */
2424                         m->m_data += JME_RX_PAD_BYTES;
2425
2426                         /* Set checksum information. */
2427                         if ((ifp->if_capenable & IFCAP_RXCSUM) &&
2428                             (flags & JME_RD_IPV4)) {
2429                                 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
2430                                 if (flags & JME_RD_IPCSUM)
2431                                         m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
2432                                 if ((flags & JME_RD_MORE_FRAG) == 0 &&
2433                                     ((flags & (JME_RD_TCP | JME_RD_TCPCSUM)) ==
2434                                      (JME_RD_TCP | JME_RD_TCPCSUM) ||
2435                                      (flags & (JME_RD_UDP | JME_RD_UDPCSUM)) ==
2436                                      (JME_RD_UDP | JME_RD_UDPCSUM))) {
2437                                         m->m_pkthdr.csum_flags |=
2438                                             CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
2439                                         m->m_pkthdr.csum_data = 0xffff;
2440                                 }
2441                         }
2442
2443                         /* Check for VLAN tagged packets. */
2444                         if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) &&
2445                             (flags & JME_RD_VLAN_TAG)) {
2446                                 m->m_pkthdr.ether_vlantag =
2447                                     flags & JME_RD_VLAN_MASK;
2448                                 m->m_flags |= M_VLANTAG;
2449                         }
2450
2451                         IFNET_STAT_INC(ifp, ipackets, 1);
2452
2453                         if (ifp->if_capenable & IFCAP_RSS)
2454                                 pi = jme_pktinfo(&pi0, flags);
2455                         else
2456                                 pi = NULL;
2457
2458                         if (pi != NULL &&
2459                             (hashinfo & JME_RD_HASH_FN_MASK) ==
2460                             JME_RD_HASH_FN_TOEPLITZ) {
2461                                 m->m_flags |= (M_HASH | M_CKHASH);
2462                                 m->m_pkthdr.hash = toeplitz_hash(hash);
2463                         }
2464
2465 #ifdef JME_RSS_DEBUG
2466                         if (pi != NULL) {
2467                                 JME_RSS_DPRINTF(rdata->jme_sc, 10,
2468                                     "isr %d flags %08x, l3 %d %s\n",
2469                                     pi->pi_netisr, pi->pi_flags,
2470                                     pi->pi_l3proto,
2471                                     (m->m_flags & M_HASH) ? "hash" : "");
2472                         }
2473 #endif
2474
2475                         /* Pass it on. */
2476                         ether_input_pkt(ifp, m, pi);
2477
2478                         /* Reset mbuf chains. */
2479                         JME_RXCHAIN_RESET(rdata);
2480 #ifdef JME_RSS_DEBUG
2481                         rdata->jme_rx_pkt++;
2482 #endif
2483                 }
2484         }
2485
2486         rdata->jme_rx_cons += nsegs;
2487         rdata->jme_rx_cons %= rdata->jme_rx_desc_cnt;
2488 }
2489
2490 static void
2491 jme_rxeof(struct jme_rxdata *rdata, int count)
2492 {
2493         struct jme_desc *desc;
2494         int nsegs, pktlen;
2495
2496         for (;;) {
2497 #ifdef IFPOLL_ENABLE
2498                 if (count >= 0 && count-- == 0)
2499                         break;
2500 #endif
2501                 desc = &rdata->jme_rx_ring[rdata->jme_rx_cons];
2502                 if ((le32toh(desc->flags) & JME_RD_OWN) == JME_RD_OWN)
2503                         break;
2504                 if ((le32toh(desc->buflen) & JME_RD_VALID) == 0)
2505                         break;
2506
2507                 /*
2508                  * Check number of segments against received bytes.
2509                  * Non-matching value would indicate that hardware
2510                  * is still trying to update Rx descriptors. I'm not
2511                  * sure whether this check is needed.
2512                  */
2513                 nsegs = JME_RX_NSEGS(le32toh(desc->buflen));
2514                 pktlen = JME_RX_BYTES(le32toh(desc->buflen));
2515                 if (nsegs != howmany(pktlen, MCLBYTES)) {
2516                         if_printf(&rdata->jme_sc->arpcom.ac_if,
2517                             "RX fragment count(%d) and "
2518                             "packet size(%d) mismach\n", nsegs, pktlen);
2519                         break;
2520                 }
2521
2522                 /*
2523                  * NOTE:
2524                  * RSS hash and hash information may _not_ be set by the
2525                  * hardware even if the OWN bit is cleared and VALID bit
2526                  * is set.
2527                  *
2528                  * If the RSS information is not delivered by the hardware
2529                  * yet, we MUST NOT accept this packet, let alone reusing
2530                  * its RX descriptor.  If this packet was accepted and its
2531                  * RX descriptor was reused before hardware delivering the
2532                  * RSS information, the RX buffer's address would be trashed
2533                  * by the RSS information delivered by the hardware.
2534                  */
2535                 if (JME_ENABLE_HWRSS(rdata->jme_sc)) {
2536                         struct jme_rxdesc *rxd;
2537                         uint32_t hashinfo;
2538
2539                         hashinfo = le32toh(desc->addr_lo);
2540                         rxd = &rdata->jme_rxdesc[rdata->jme_rx_cons];
2541
2542                         /*
2543                          * This test should be enough to detect the pending
2544                          * RSS information delivery, given:
2545                          * - If RSS hash is not calculated, the hashinfo
2546                          *   will be 0.  Howvever, the lower 32bits of RX
2547                          *   buffers' physical address will never be 0.
2548                          *   (see jme_rxbuf_dma_filter)
2549                          * - If RSS hash is calculated, the lowest 4 bits
2550                          *   of hashinfo will be set, while the RX buffers
2551                          *   are at least 2K aligned.
2552                          */
2553                         if (hashinfo == JME_ADDR_LO(rxd->rx_paddr)) {
2554 #ifdef JME_SHOW_RSSWB
2555                                 if_printf(&rdata->jme_sc->arpcom.ac_if,
2556                                     "RSS is not written back yet\n");
2557 #endif
2558                                 break;
2559                         }
2560                 }
2561
2562                 /* Received a frame. */
2563                 jme_rxpkt(rdata);
2564         }
2565 }
2566
2567 static void
2568 jme_tick(void *xsc)
2569 {
2570         struct jme_softc *sc = xsc;
2571         struct mii_data *mii = device_get_softc(sc->jme_miibus);
2572
2573         lwkt_serialize_enter(&sc->jme_serialize);
2574
2575         KKASSERT(mycpuid == JME_TICK_CPUID);
2576
2577         sc->jme_in_tick = TRUE;
2578         mii_tick(mii);
2579         sc->jme_in_tick = FALSE;
2580
2581         callout_reset(&sc->jme_tick_ch, hz, jme_tick, sc);
2582
2583         lwkt_serialize_exit(&sc->jme_serialize);
2584 }
2585
2586 static void
2587 jme_reset(struct jme_softc *sc)
2588 {
2589         uint32_t val;
2590
2591         /* Make sure that TX and RX are stopped */
2592         jme_stop_tx(sc);
2593         jme_stop_rx(sc);
2594
2595         /* Start reset */
2596         CSR_WRITE_4(sc, JME_GHC, GHC_RESET);
2597         DELAY(20);
2598
2599         /*
2600          * Hold reset bit before stop reset
2601          */
2602
2603         /* Disable TXMAC and TXOFL clock sources */
2604         CSR_WRITE_4(sc, JME_GHC, GHC_RESET);
2605         /* Disable RXMAC clock source */
2606         val = CSR_READ_4(sc, JME_GPREG1);
2607         CSR_WRITE_4(sc, JME_GPREG1, val | GPREG1_DIS_RXMAC_CLKSRC);
2608         /* Flush */
2609         CSR_READ_4(sc, JME_GHC);
2610
2611         /* Stop reset */
2612         CSR_WRITE_4(sc, JME_GHC, 0);
2613         /* Flush */
2614         CSR_READ_4(sc, JME_GHC);
2615
2616         /*
2617          * Clear reset bit after stop reset
2618          */
2619
2620         /* Enable TXMAC and TXOFL clock sources */
2621         CSR_WRITE_4(sc, JME_GHC, GHC_TXOFL_CLKSRC | GHC_TXMAC_CLKSRC);
2622         /* Enable RXMAC clock source */
2623         val = CSR_READ_4(sc, JME_GPREG1);
2624         CSR_WRITE_4(sc, JME_GPREG1, val & ~GPREG1_DIS_RXMAC_CLKSRC);
2625         /* Flush */
2626         CSR_READ_4(sc, JME_GHC);
2627
2628         /* Disable TXMAC and TXOFL clock sources */
2629         CSR_WRITE_4(sc, JME_GHC, 0);
2630         /* Disable RXMAC clock source */
2631         val = CSR_READ_4(sc, JME_GPREG1);
2632         CSR_WRITE_4(sc, JME_GPREG1, val | GPREG1_DIS_RXMAC_CLKSRC);
2633         /* Flush */
2634         CSR_READ_4(sc, JME_GHC);
2635
2636         /* Enable TX and RX */
2637         val = CSR_READ_4(sc, JME_TXCSR);
2638         CSR_WRITE_4(sc, JME_TXCSR, val | TXCSR_TX_ENB);
2639         val = CSR_READ_4(sc, JME_RXCSR);
2640         CSR_WRITE_4(sc, JME_RXCSR, val | RXCSR_RX_ENB);
2641         /* Flush */
2642         CSR_READ_4(sc, JME_TXCSR);
2643         CSR_READ_4(sc, JME_RXCSR);
2644
2645         /* Enable TXMAC and TXOFL clock sources */
2646         CSR_WRITE_4(sc, JME_GHC, GHC_TXOFL_CLKSRC | GHC_TXMAC_CLKSRC);
2647         /* Eisable RXMAC clock source */
2648         val = CSR_READ_4(sc, JME_GPREG1);
2649         CSR_WRITE_4(sc, JME_GPREG1, val & ~GPREG1_DIS_RXMAC_CLKSRC);
2650         /* Flush */
2651         CSR_READ_4(sc, JME_GHC);
2652
2653         /* Stop TX and RX */
2654         jme_stop_tx(sc);
2655         jme_stop_rx(sc);
2656 }
2657
2658 static void
2659 jme_init(void *xsc)
2660 {
2661         struct jme_softc *sc = xsc;
2662         struct ifnet *ifp = &sc->arpcom.ac_if;
2663         struct mii_data *mii;
2664         uint8_t eaddr[ETHER_ADDR_LEN];
2665         bus_addr_t paddr;
2666         uint32_t reg;
2667         int error, r;
2668
2669         ASSERT_IFNET_SERIALIZED_ALL(ifp);
2670
2671         /*
2672          * Cancel any pending I/O.
2673          */
2674         jme_stop(sc);
2675
2676         /*
2677          * Reset the chip to a known state.
2678          */
2679         jme_reset(sc);
2680
2681         /*
2682          * Setup MSI/MSI-X vectors to interrupts mapping
2683          */
2684         jme_set_msinum(sc);
2685
2686         if (JME_ENABLE_HWRSS(sc))
2687                 jme_enable_rss(sc);
2688         else
2689                 jme_disable_rss(sc);
2690
2691         /* Init RX descriptors */
2692         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
2693                 error = jme_init_rx_ring(&sc->jme_cdata.jme_rx_data[r]);
2694                 if (error) {
2695                         if_printf(ifp, "initialization failed: "
2696                                   "no memory for %dth RX ring.\n", r);
2697                         jme_stop(sc);
2698                         return;
2699                 }
2700         }
2701
2702         /* Init TX descriptors */
2703         jme_init_tx_ring(&sc->jme_cdata.jme_tx_data);
2704
2705         /* Initialize shadow status block. */
2706         jme_init_ssb(sc);
2707
2708         /* Reprogram the station address. */
2709         bcopy(IF_LLADDR(ifp), eaddr, ETHER_ADDR_LEN);
2710         CSR_WRITE_4(sc, JME_PAR0,
2711             eaddr[3] << 24 | eaddr[2] << 16 | eaddr[1] << 8 | eaddr[0]);
2712         CSR_WRITE_4(sc, JME_PAR1, eaddr[5] << 8 | eaddr[4]);
2713
2714         /*
2715          * Configure Tx queue.
2716          *  Tx priority queue weight value : 0
2717          *  Tx FIFO threshold for processing next packet : 16QW
2718          *  Maximum Tx DMA length : 512
2719          *  Allow Tx DMA burst.
2720          */
2721         sc->jme_txcsr = TXCSR_TXQ_N_SEL(TXCSR_TXQ0);
2722         sc->jme_txcsr |= TXCSR_TXQ_WEIGHT(TXCSR_TXQ_WEIGHT_MIN);
2723         sc->jme_txcsr |= TXCSR_FIFO_THRESH_16QW;
2724         sc->jme_txcsr |= sc->jme_tx_dma_size;
2725         sc->jme_txcsr |= TXCSR_DMA_BURST;
2726         CSR_WRITE_4(sc, JME_TXCSR, sc->jme_txcsr);
2727
2728         /* Set Tx descriptor counter. */
2729         CSR_WRITE_4(sc, JME_TXQDC, sc->jme_cdata.jme_tx_data.jme_tx_desc_cnt);
2730
2731         /* Set Tx ring address to the hardware. */
2732         paddr = sc->jme_cdata.jme_tx_data.jme_tx_ring_paddr;
2733         CSR_WRITE_4(sc, JME_TXDBA_HI, JME_ADDR_HI(paddr));
2734         CSR_WRITE_4(sc, JME_TXDBA_LO, JME_ADDR_LO(paddr));
2735
2736         /* Configure TxMAC parameters. */
2737         reg = TXMAC_IFG1_DEFAULT | TXMAC_IFG2_DEFAULT | TXMAC_IFG_ENB;
2738         reg |= TXMAC_THRESH_1_PKT;
2739         reg |= TXMAC_CRC_ENB | TXMAC_PAD_ENB;
2740         CSR_WRITE_4(sc, JME_TXMAC, reg);
2741
2742         /*
2743          * Configure Rx queue.
2744          *  FIFO full threshold for transmitting Tx pause packet : 128T
2745          *  FIFO threshold for processing next packet : 128QW
2746          *  Rx queue 0 select
2747          *  Max Rx DMA length : 128
2748          *  Rx descriptor retry : 32
2749          *  Rx descriptor retry time gap : 256ns
2750          *  Don't receive runt/bad frame.
2751          */
2752         sc->jme_rxcsr = RXCSR_FIFO_FTHRESH_128T;
2753 #if 0
2754         /*
2755          * Since Rx FIFO size is 4K bytes, receiving frames larger
2756          * than 4K bytes will suffer from Rx FIFO overruns. So
2757          * decrease FIFO threshold to reduce the FIFO overruns for
2758          * frames larger than 4000 bytes.
2759          * For best performance of standard MTU sized frames use
2760          * maximum allowable FIFO threshold, 128QW.
2761          */
2762         if ((ifp->if_mtu + ETHER_HDR_LEN + EVL_ENCAPLEN + ETHER_CRC_LEN) >
2763             JME_RX_FIFO_SIZE)
2764                 sc->jme_rxcsr |= RXCSR_FIFO_THRESH_16QW;
2765         else
2766                 sc->jme_rxcsr |= RXCSR_FIFO_THRESH_128QW;
2767 #else
2768         /* Improve PCI Express compatibility */
2769         sc->jme_rxcsr |= RXCSR_FIFO_THRESH_16QW;
2770 #endif
2771         sc->jme_rxcsr |= sc->jme_rx_dma_size;
2772         sc->jme_rxcsr |= RXCSR_DESC_RT_CNT(RXCSR_DESC_RT_CNT_DEFAULT);
2773         sc->jme_rxcsr |= RXCSR_DESC_RT_GAP_256 & RXCSR_DESC_RT_GAP_MASK;
2774         /* XXX TODO DROP_BAD */
2775
2776         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
2777                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[r];
2778
2779                 CSR_WRITE_4(sc, JME_RXCSR, sc->jme_rxcsr | RXCSR_RXQ_N_SEL(r));
2780
2781                 /* Set Rx descriptor counter. */
2782                 CSR_WRITE_4(sc, JME_RXQDC, rdata->jme_rx_desc_cnt);
2783
2784                 /* Set Rx ring address to the hardware. */
2785                 paddr = rdata->jme_rx_ring_paddr;
2786                 CSR_WRITE_4(sc, JME_RXDBA_HI, JME_ADDR_HI(paddr));
2787                 CSR_WRITE_4(sc, JME_RXDBA_LO, JME_ADDR_LO(paddr));
2788         }
2789
2790         /* Clear receive filter. */
2791         CSR_WRITE_4(sc, JME_RXMAC, 0);
2792
2793         /* Set up the receive filter. */
2794         jme_set_filter(sc);
2795         jme_set_vlan(sc);
2796
2797         /*
2798          * Disable all WOL bits as WOL can interfere normal Rx
2799          * operation. Also clear WOL detection status bits.
2800          */
2801         reg = CSR_READ_4(sc, JME_PMCS);
2802         reg &= ~PMCS_WOL_ENB_MASK;
2803         CSR_WRITE_4(sc, JME_PMCS, reg);
2804
2805         /*
2806          * Pad 10bytes right before received frame. This will greatly
2807          * help Rx performance on strict-alignment architectures as
2808          * it does not need to copy the frame to align the payload.
2809          */
2810         reg = CSR_READ_4(sc, JME_RXMAC);
2811         reg |= RXMAC_PAD_10BYTES;
2812
2813         if (ifp->if_capenable & IFCAP_RXCSUM)
2814                 reg |= RXMAC_CSUM_ENB;
2815         CSR_WRITE_4(sc, JME_RXMAC, reg);
2816
2817         /* Configure general purpose reg0 */
2818         reg = CSR_READ_4(sc, JME_GPREG0);
2819         reg &= ~GPREG0_PCC_UNIT_MASK;
2820         /* Set PCC timer resolution to micro-seconds unit. */
2821         reg |= GPREG0_PCC_UNIT_US;
2822         /*
2823          * Disable all shadow register posting as we have to read
2824          * JME_INTR_STATUS register in jme_intr. Also it seems
2825          * that it's hard to synchronize interrupt status between
2826          * hardware and software with shadow posting due to
2827          * requirements of bus_dmamap_sync(9).
2828          */
2829         reg |= GPREG0_SH_POST_DW7_DIS | GPREG0_SH_POST_DW6_DIS |
2830             GPREG0_SH_POST_DW5_DIS | GPREG0_SH_POST_DW4_DIS |
2831             GPREG0_SH_POST_DW3_DIS | GPREG0_SH_POST_DW2_DIS |
2832             GPREG0_SH_POST_DW1_DIS | GPREG0_SH_POST_DW0_DIS;
2833         /* Disable posting of DW0. */
2834         reg &= ~GPREG0_POST_DW0_ENB;
2835         /* Clear PME message. */
2836         reg &= ~GPREG0_PME_ENB;
2837         /* Set PHY address. */
2838         reg &= ~GPREG0_PHY_ADDR_MASK;
2839         reg |= sc->jme_phyaddr;
2840         CSR_WRITE_4(sc, JME_GPREG0, reg);
2841
2842         /* Configure Tx queue 0 packet completion coalescing. */
2843         jme_set_tx_coal(sc);
2844
2845         /* Configure Rx queues packet completion coalescing. */
2846         jme_set_rx_coal(sc);
2847
2848         /* Configure shadow status block but don't enable posting. */
2849         paddr = sc->jme_cdata.jme_ssb_block_paddr;
2850         CSR_WRITE_4(sc, JME_SHBASE_ADDR_HI, JME_ADDR_HI(paddr));
2851         CSR_WRITE_4(sc, JME_SHBASE_ADDR_LO, JME_ADDR_LO(paddr));
2852
2853         /* Disable Timer 1 and Timer 2. */
2854         CSR_WRITE_4(sc, JME_TIMER1, 0);
2855         CSR_WRITE_4(sc, JME_TIMER2, 0);
2856
2857         /* Configure retry transmit period, retry limit value. */
2858         CSR_WRITE_4(sc, JME_TXTRHD,
2859             ((TXTRHD_RT_PERIOD_DEFAULT << TXTRHD_RT_PERIOD_SHIFT) &
2860             TXTRHD_RT_PERIOD_MASK) |
2861             ((TXTRHD_RT_LIMIT_DEFAULT << TXTRHD_RT_LIMIT_SHIFT) &
2862             TXTRHD_RT_LIMIT_SHIFT));
2863
2864 #ifdef IFPOLL_ENABLE
2865         if (!(ifp->if_flags & IFF_NPOLLING))
2866 #endif
2867         /* Initialize the interrupt mask. */
2868         jme_enable_intr(sc);
2869         CSR_WRITE_4(sc, JME_INTR_STATUS, 0xFFFFFFFF);
2870
2871         /*
2872          * Enabling Tx/Rx DMA engines and Rx queue processing is
2873          * done after detection of valid link in jme_miibus_statchg.
2874          */
2875         sc->jme_has_link = FALSE;
2876
2877         /* Set the current media. */
2878         mii = device_get_softc(sc->jme_miibus);
2879         mii_mediachg(mii);
2880
2881         callout_reset_bycpu(&sc->jme_tick_ch, hz, jme_tick, sc,
2882             JME_TICK_CPUID);
2883
2884         ifp->if_flags |= IFF_RUNNING;
2885         ifq_clr_oactive(&ifp->if_snd);
2886 }
2887
2888 static void
2889 jme_stop(struct jme_softc *sc)
2890 {
2891         struct ifnet *ifp = &sc->arpcom.ac_if;
2892         struct jme_txdata *tdata = &sc->jme_cdata.jme_tx_data;
2893         struct jme_txdesc *txd;
2894         struct jme_rxdesc *rxd;
2895         struct jme_rxdata *rdata;
2896         int i, r;
2897
2898         ASSERT_IFNET_SERIALIZED_ALL(ifp);
2899
2900         /*
2901          * Mark the interface down and cancel the watchdog timer.
2902          */
2903         ifp->if_flags &= ~IFF_RUNNING;
2904         ifq_clr_oactive(&ifp->if_snd);
2905         ifp->if_timer = 0;
2906
2907         callout_stop(&sc->jme_tick_ch);
2908         sc->jme_has_link = FALSE;
2909
2910         /*
2911          * Disable interrupts.
2912          */
2913         jme_disable_intr(sc);
2914         CSR_WRITE_4(sc, JME_INTR_STATUS, 0xFFFFFFFF);
2915
2916         /* Disable updating shadow status block. */
2917         CSR_WRITE_4(sc, JME_SHBASE_ADDR_LO,
2918             CSR_READ_4(sc, JME_SHBASE_ADDR_LO) & ~SHBASE_POST_ENB);
2919
2920         /* Stop receiver, transmitter. */
2921         jme_stop_rx(sc);
2922         jme_stop_tx(sc);
2923
2924         /*
2925          * Free partial finished RX segments
2926          */
2927         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
2928                 rdata = &sc->jme_cdata.jme_rx_data[r];
2929                 if (rdata->jme_rxhead != NULL)
2930                         m_freem(rdata->jme_rxhead);
2931                 JME_RXCHAIN_RESET(rdata);
2932         }
2933
2934         /*
2935          * Free RX and TX mbufs still in the queues.
2936          */
2937         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
2938                 rdata = &sc->jme_cdata.jme_rx_data[r];
2939                 for (i = 0; i < rdata->jme_rx_desc_cnt; i++) {
2940                         rxd = &rdata->jme_rxdesc[i];
2941                         if (rxd->rx_m != NULL) {
2942                                 bus_dmamap_unload(rdata->jme_rx_tag,
2943                                                   rxd->rx_dmamap);
2944                                 m_freem(rxd->rx_m);
2945                                 rxd->rx_m = NULL;
2946                         }
2947                 }
2948         }
2949         for (i = 0; i < tdata->jme_tx_desc_cnt; i++) {
2950                 txd = &tdata->jme_txdesc[i];
2951                 if (txd->tx_m != NULL) {
2952                         bus_dmamap_unload(tdata->jme_tx_tag, txd->tx_dmamap);
2953                         m_freem(txd->tx_m);
2954                         txd->tx_m = NULL;
2955                         txd->tx_ndesc = 0;
2956                 }
2957         }
2958 }
2959
2960 static void
2961 jme_stop_tx(struct jme_softc *sc)
2962 {
2963         uint32_t reg;
2964         int i;
2965
2966         reg = CSR_READ_4(sc, JME_TXCSR);
2967         if ((reg & TXCSR_TX_ENB) == 0)
2968                 return;
2969         reg &= ~TXCSR_TX_ENB;
2970         CSR_WRITE_4(sc, JME_TXCSR, reg);
2971         for (i = JME_TIMEOUT; i > 0; i--) {
2972                 DELAY(1);
2973                 if ((CSR_READ_4(sc, JME_TXCSR) & TXCSR_TX_ENB) == 0)
2974                         break;
2975         }
2976         if (i == 0)
2977                 device_printf(sc->jme_dev, "stopping transmitter timeout!\n");
2978 }
2979
2980 static void
2981 jme_stop_rx(struct jme_softc *sc)
2982 {
2983         uint32_t reg;
2984         int i;
2985
2986         reg = CSR_READ_4(sc, JME_RXCSR);
2987         if ((reg & RXCSR_RX_ENB) == 0)
2988                 return;
2989         reg &= ~RXCSR_RX_ENB;
2990         CSR_WRITE_4(sc, JME_RXCSR, reg);
2991         for (i = JME_TIMEOUT; i > 0; i--) {
2992                 DELAY(1);
2993                 if ((CSR_READ_4(sc, JME_RXCSR) & RXCSR_RX_ENB) == 0)
2994                         break;
2995         }
2996         if (i == 0)
2997                 device_printf(sc->jme_dev, "stopping recevier timeout!\n");
2998 }
2999
3000 static void
3001 jme_init_tx_ring(struct jme_txdata *tdata)
3002 {
3003         struct jme_txdesc *txd;
3004         int i;
3005
3006         tdata->jme_tx_prod = 0;
3007         tdata->jme_tx_cons = 0;
3008         tdata->jme_tx_cnt = 0;
3009
3010         bzero(tdata->jme_tx_ring, JME_TX_RING_SIZE(tdata));
3011         for (i = 0; i < tdata->jme_tx_desc_cnt; i++) {
3012                 txd = &tdata->jme_txdesc[i];
3013                 txd->tx_m = NULL;
3014                 txd->tx_desc = &tdata->jme_tx_ring[i];
3015                 txd->tx_ndesc = 0;
3016         }
3017 }
3018
3019 static void
3020 jme_init_ssb(struct jme_softc *sc)
3021 {
3022         struct jme_chain_data *cd;
3023
3024         cd = &sc->jme_cdata;
3025         bzero(cd->jme_ssb_block, JME_SSB_SIZE);
3026 }
3027
3028 static int
3029 jme_init_rx_ring(struct jme_rxdata *rdata)
3030 {
3031         struct jme_rxdesc *rxd;
3032         int i;
3033
3034         KKASSERT(rdata->jme_rxhead == NULL &&
3035                  rdata->jme_rxtail == NULL &&
3036                  rdata->jme_rxlen == 0);
3037         rdata->jme_rx_cons = 0;
3038
3039         bzero(rdata->jme_rx_ring, JME_RX_RING_SIZE(rdata));
3040         for (i = 0; i < rdata->jme_rx_desc_cnt; i++) {
3041                 int error;
3042
3043                 rxd = &rdata->jme_rxdesc[i];
3044                 rxd->rx_m = NULL;
3045                 rxd->rx_desc = &rdata->jme_rx_ring[i];
3046                 error = jme_newbuf(rdata, rxd, 1);
3047                 if (error)
3048                         return error;
3049         }
3050         return 0;
3051 }
3052
3053 static int
3054 jme_newbuf(struct jme_rxdata *rdata, struct jme_rxdesc *rxd, int init)
3055 {
3056         struct mbuf *m;
3057         bus_dma_segment_t segs;
3058         bus_dmamap_t map;
3059         int error, nsegs;
3060
3061         m = m_getcl(init ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR);
3062         if (m == NULL)
3063                 return ENOBUFS;
3064         /*
3065          * JMC250 has 64bit boundary alignment limitation so jme(4)
3066          * takes advantage of 10 bytes padding feature of hardware
3067          * in order not to copy entire frame to align IP header on
3068          * 32bit boundary.
3069          */
3070         m->m_len = m->m_pkthdr.len = MCLBYTES;
3071
3072         error = bus_dmamap_load_mbuf_segment(rdata->jme_rx_tag,
3073                         rdata->jme_rx_sparemap, m, &segs, 1, &nsegs,
3074                         BUS_DMA_NOWAIT);
3075         if (error) {
3076                 m_freem(m);
3077                 if (init) {
3078                         if_printf(&rdata->jme_sc->arpcom.ac_if,
3079                             "can't load RX mbuf\n");
3080                 }
3081                 return error;
3082         }
3083
3084         if (rxd->rx_m != NULL) {
3085                 bus_dmamap_sync(rdata->jme_rx_tag, rxd->rx_dmamap,
3086                                 BUS_DMASYNC_POSTREAD);
3087                 bus_dmamap_unload(rdata->jme_rx_tag, rxd->rx_dmamap);
3088         }
3089         map = rxd->rx_dmamap;
3090         rxd->rx_dmamap = rdata->jme_rx_sparemap;
3091         rdata->jme_rx_sparemap = map;
3092         rxd->rx_m = m;
3093         rxd->rx_paddr = segs.ds_addr;
3094
3095         jme_setup_rxdesc(rxd);
3096         return 0;
3097 }
3098
3099 static void
3100 jme_set_vlan(struct jme_softc *sc)
3101 {
3102         struct ifnet *ifp = &sc->arpcom.ac_if;
3103         uint32_t reg;
3104
3105         ASSERT_IFNET_SERIALIZED_ALL(ifp);
3106
3107         reg = CSR_READ_4(sc, JME_RXMAC);
3108         reg &= ~RXMAC_VLAN_ENB;
3109         if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
3110                 reg |= RXMAC_VLAN_ENB;
3111         CSR_WRITE_4(sc, JME_RXMAC, reg);
3112 }
3113
3114 static void
3115 jme_set_filter(struct jme_softc *sc)
3116 {
3117         struct ifnet *ifp = &sc->arpcom.ac_if;
3118         struct ifmultiaddr *ifma;
3119         uint32_t crc;
3120         uint32_t mchash[2];
3121         uint32_t rxcfg;
3122
3123         ASSERT_IFNET_SERIALIZED_ALL(ifp);
3124
3125         rxcfg = CSR_READ_4(sc, JME_RXMAC);
3126         rxcfg &= ~(RXMAC_BROADCAST | RXMAC_PROMISC | RXMAC_MULTICAST |
3127             RXMAC_ALLMULTI);
3128
3129         /*
3130          * Always accept frames destined to our station address.
3131          * Always accept broadcast frames.
3132          */
3133         rxcfg |= RXMAC_UNICAST | RXMAC_BROADCAST;
3134
3135         if (ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI)) {
3136                 if (ifp->if_flags & IFF_PROMISC)
3137                         rxcfg |= RXMAC_PROMISC;
3138                 if (ifp->if_flags & IFF_ALLMULTI)
3139                         rxcfg |= RXMAC_ALLMULTI;
3140                 CSR_WRITE_4(sc, JME_MAR0, 0xFFFFFFFF);
3141                 CSR_WRITE_4(sc, JME_MAR1, 0xFFFFFFFF);
3142                 CSR_WRITE_4(sc, JME_RXMAC, rxcfg);
3143                 return;
3144         }
3145
3146         /*
3147          * Set up the multicast address filter by passing all multicast
3148          * addresses through a CRC generator, and then using the low-order
3149          * 6 bits as an index into the 64 bit multicast hash table.  The
3150          * high order bits select the register, while the rest of the bits
3151          * select the bit within the register.
3152          */
3153         rxcfg |= RXMAC_MULTICAST;
3154         bzero(mchash, sizeof(mchash));
3155
3156         TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3157                 if (ifma->ifma_addr->sa_family != AF_LINK)
3158                         continue;
3159                 crc = ether_crc32_be(LLADDR((struct sockaddr_dl *)
3160                     ifma->ifma_addr), ETHER_ADDR_LEN);
3161
3162                 /* Just want the 6 least significant bits. */
3163                 crc &= 0x3f;
3164
3165                 /* Set the corresponding bit in the hash table. */
3166                 mchash[crc >> 5] |= 1 << (crc & 0x1f);
3167         }
3168
3169         CSR_WRITE_4(sc, JME_MAR0, mchash[0]);
3170         CSR_WRITE_4(sc, JME_MAR1, mchash[1]);
3171         CSR_WRITE_4(sc, JME_RXMAC, rxcfg);
3172 }
3173
3174 static int
3175 jme_sysctl_tx_coal_to(SYSCTL_HANDLER_ARGS)
3176 {
3177         struct jme_softc *sc = arg1;
3178         struct ifnet *ifp = &sc->arpcom.ac_if;
3179         int error, v;
3180
3181         ifnet_serialize_all(ifp);
3182
3183         v = sc->jme_tx_coal_to;
3184         error = sysctl_handle_int(oidp, &v, 0, req);
3185         if (error || req->newptr == NULL)
3186                 goto back;
3187
3188         if (v < PCCTX_COAL_TO_MIN || v > PCCTX_COAL_TO_MAX) {
3189                 error = EINVAL;
3190                 goto back;
3191         }
3192
3193         if (v != sc->jme_tx_coal_to) {
3194                 sc->jme_tx_coal_to = v;
3195                 if (ifp->if_flags & IFF_RUNNING)
3196                         jme_set_tx_coal(sc);
3197         }
3198 back:
3199         ifnet_deserialize_all(ifp);
3200         return error;
3201 }
3202
3203 static int
3204 jme_sysctl_tx_coal_pkt(SYSCTL_HANDLER_ARGS)
3205 {
3206         struct jme_softc *sc = arg1;
3207         struct ifnet *ifp = &sc->arpcom.ac_if;
3208         int error, v;
3209
3210         ifnet_serialize_all(ifp);
3211
3212         v = sc->jme_tx_coal_pkt;
3213         error = sysctl_handle_int(oidp, &v, 0, req);
3214         if (error || req->newptr == NULL)
3215                 goto back;
3216
3217         if (v < PCCTX_COAL_PKT_MIN || v > PCCTX_COAL_PKT_MAX) {
3218                 error = EINVAL;
3219                 goto back;
3220         }
3221
3222         if (v != sc->jme_tx_coal_pkt) {
3223                 sc->jme_tx_coal_pkt = v;
3224                 if (ifp->if_flags & IFF_RUNNING)
3225                         jme_set_tx_coal(sc);
3226         }
3227 back:
3228         ifnet_deserialize_all(ifp);
3229         return error;
3230 }
3231
3232 static int
3233 jme_sysctl_rx_coal_to(SYSCTL_HANDLER_ARGS)
3234 {
3235         struct jme_softc *sc = arg1;
3236         struct ifnet *ifp = &sc->arpcom.ac_if;
3237         int error, v;
3238
3239         ifnet_serialize_all(ifp);
3240
3241         v = sc->jme_rx_coal_to;
3242         error = sysctl_handle_int(oidp, &v, 0, req);
3243         if (error || req->newptr == NULL)
3244                 goto back;
3245
3246         if (v < PCCRX_COAL_TO_MIN || v > PCCRX_COAL_TO_MAX) {
3247                 error = EINVAL;
3248                 goto back;
3249         }
3250
3251         if (v != sc->jme_rx_coal_to) {
3252                 sc->jme_rx_coal_to = v;
3253                 if (ifp->if_flags & IFF_RUNNING)
3254                         jme_set_rx_coal(sc);
3255         }
3256 back:
3257         ifnet_deserialize_all(ifp);
3258         return error;
3259 }
3260
3261 static int
3262 jme_sysctl_rx_coal_pkt(SYSCTL_HANDLER_ARGS)
3263 {
3264         struct jme_softc *sc = arg1;
3265         struct ifnet *ifp = &sc->arpcom.ac_if;
3266         int error, v;
3267
3268         ifnet_serialize_all(ifp);
3269
3270         v = sc->jme_rx_coal_pkt;
3271         error = sysctl_handle_int(oidp, &v, 0, req);
3272         if (error || req->newptr == NULL)
3273                 goto back;
3274
3275         if (v < PCCRX_COAL_PKT_MIN || v > PCCRX_COAL_PKT_MAX) {
3276                 error = EINVAL;
3277                 goto back;
3278         }
3279
3280         if (v != sc->jme_rx_coal_pkt) {
3281                 sc->jme_rx_coal_pkt = v;
3282                 if (ifp->if_flags & IFF_RUNNING)
3283                         jme_set_rx_coal(sc);
3284         }
3285 back:
3286         ifnet_deserialize_all(ifp);
3287         return error;
3288 }
3289
3290 static void
3291 jme_set_tx_coal(struct jme_softc *sc)
3292 {
3293         uint32_t reg;
3294
3295         reg = (sc->jme_tx_coal_to << PCCTX_COAL_TO_SHIFT) &
3296             PCCTX_COAL_TO_MASK;
3297         reg |= (sc->jme_tx_coal_pkt << PCCTX_COAL_PKT_SHIFT) &
3298             PCCTX_COAL_PKT_MASK;
3299         reg |= PCCTX_COAL_TXQ0;
3300         CSR_WRITE_4(sc, JME_PCCTX, reg);
3301 }
3302
3303 static void
3304 jme_set_rx_coal(struct jme_softc *sc)
3305 {
3306         uint32_t reg;
3307         int r;
3308
3309         reg = (sc->jme_rx_coal_to << PCCRX_COAL_TO_SHIFT) &
3310             PCCRX_COAL_TO_MASK;
3311         reg |= (sc->jme_rx_coal_pkt << PCCRX_COAL_PKT_SHIFT) &
3312             PCCRX_COAL_PKT_MASK;
3313         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r)
3314                 CSR_WRITE_4(sc, JME_PCCRX(r), reg);
3315 }
3316
3317 #ifdef IFPOLL_ENABLE
3318
3319 static void
3320 jme_npoll_status(struct ifnet *ifp)
3321 {
3322         struct jme_softc *sc = ifp->if_softc;
3323         uint32_t status;
3324
3325         ASSERT_SERIALIZED(&sc->jme_serialize);
3326
3327         status = CSR_READ_4(sc, JME_INTR_STATUS);
3328         if (status & INTR_RXQ_DESC_EMPTY) {
3329                 CSR_WRITE_4(sc, JME_INTR_STATUS, status & INTR_RXQ_DESC_EMPTY);
3330                 jme_rx_restart(sc, status);
3331         }
3332 }
3333
3334 static void
3335 jme_npoll_rx(struct ifnet *ifp __unused, void *arg, int cycle)
3336 {
3337         struct jme_rxdata *rdata = arg;
3338
3339         ASSERT_SERIALIZED(&rdata->jme_rx_serialize);
3340
3341         jme_rxeof(rdata, cycle);
3342 }
3343
3344 static void
3345 jme_npoll_tx(struct ifnet *ifp, void *arg, int cycle __unused)
3346 {
3347         struct jme_txdata *tdata = arg;
3348
3349         ASSERT_SERIALIZED(&tdata->jme_tx_serialize);
3350
3351         jme_txeof(tdata);
3352         if (!ifq_is_empty(&ifp->if_snd))
3353                 if_devstart(ifp);
3354 }
3355
3356 static void
3357 jme_npoll(struct ifnet *ifp, struct ifpoll_info *info)
3358 {
3359         struct jme_softc *sc = ifp->if_softc;
3360
3361         ASSERT_IFNET_SERIALIZED_ALL(ifp);
3362
3363         if (info) {
3364                 int i, off;
3365
3366                 info->ifpi_status.status_func = jme_npoll_status;
3367                 info->ifpi_status.serializer = &sc->jme_serialize;
3368
3369                 off = sc->jme_npoll_txoff;
3370                 KKASSERT(off <= ncpus2);
3371                 info->ifpi_tx[off].poll_func = jme_npoll_tx;
3372                 info->ifpi_tx[off].arg = &sc->jme_cdata.jme_tx_data;
3373                 info->ifpi_tx[off].serializer =
3374                     &sc->jme_cdata.jme_tx_data.jme_tx_serialize;
3375
3376                 off = sc->jme_npoll_rxoff;
3377                 for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
3378                         struct jme_rxdata *rdata =
3379                             &sc->jme_cdata.jme_rx_data[i];
3380                         int idx = i + off;
3381
3382                         info->ifpi_rx[idx].poll_func = jme_npoll_rx;
3383                         info->ifpi_rx[idx].arg = rdata;
3384                         info->ifpi_rx[idx].serializer =
3385                             &rdata->jme_rx_serialize;
3386                 }
3387
3388                 if (ifp->if_flags & IFF_RUNNING)
3389                         jme_disable_intr(sc);
3390                 ifq_set_cpuid(&ifp->if_snd, sc->jme_npoll_txoff);
3391         } else {
3392                 if (ifp->if_flags & IFF_RUNNING)
3393                         jme_enable_intr(sc);
3394                 ifq_set_cpuid(&ifp->if_snd, sc->jme_tx_cpuid);
3395         }
3396 }
3397
3398 static int
3399 jme_sysctl_npoll_rxoff(SYSCTL_HANDLER_ARGS)
3400 {
3401         struct jme_softc *sc = (void *)arg1;
3402         struct ifnet *ifp = &sc->arpcom.ac_if;
3403         int error, off;
3404
3405         off = sc->jme_npoll_rxoff;
3406         error = sysctl_handle_int(oidp, &off, 0, req);
3407         if (error || req->newptr == NULL)
3408                 return error;
3409         if (off < 0)
3410                 return EINVAL;
3411
3412         ifnet_serialize_all(ifp);
3413         if (off >= ncpus2 || off % sc->jme_cdata.jme_rx_ring_cnt != 0) {
3414                 error = EINVAL;
3415         } else {
3416                 error = 0;
3417                 sc->jme_npoll_rxoff = off;
3418         }
3419         ifnet_deserialize_all(ifp);
3420
3421         return error;
3422 }
3423
3424 static int
3425 jme_sysctl_npoll_txoff(SYSCTL_HANDLER_ARGS)
3426 {
3427         struct jme_softc *sc = (void *)arg1;
3428         struct ifnet *ifp = &sc->arpcom.ac_if;
3429         int error, off;
3430
3431         off = sc->jme_npoll_txoff;
3432         error = sysctl_handle_int(oidp, &off, 0, req);
3433         if (error || req->newptr == NULL)
3434                 return error;
3435         if (off < 0)
3436                 return EINVAL;
3437
3438         ifnet_serialize_all(ifp);
3439         if (off >= ncpus2) {
3440                 error = EINVAL;
3441         } else {
3442                 error = 0;
3443                 sc->jme_npoll_txoff = off;
3444         }
3445         ifnet_deserialize_all(ifp);
3446
3447         return error;
3448 }
3449
3450 #endif  /* IFPOLL_ENABLE */
3451
3452 static int
3453 jme_rxring_dma_alloc(struct jme_rxdata *rdata)
3454 {
3455         bus_dmamem_t dmem;
3456         int error, asize;
3457
3458         asize = roundup2(JME_RX_RING_SIZE(rdata), JME_RX_RING_ALIGN);
3459         error = bus_dmamem_coherent(rdata->jme_sc->jme_cdata.jme_ring_tag,
3460                         JME_RX_RING_ALIGN, 0,
3461                         BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3462                         asize, BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem);
3463         if (error) {
3464                 device_printf(rdata->jme_sc->jme_dev,
3465                     "could not allocate %dth Rx ring.\n", rdata->jme_rx_idx);
3466                 return error;
3467         }
3468         rdata->jme_rx_ring_tag = dmem.dmem_tag;
3469         rdata->jme_rx_ring_map = dmem.dmem_map;
3470         rdata->jme_rx_ring = dmem.dmem_addr;
3471         rdata->jme_rx_ring_paddr = dmem.dmem_busaddr;
3472
3473         return 0;
3474 }
3475
3476 static int
3477 jme_rxbuf_dma_filter(void *arg __unused, bus_addr_t paddr)
3478 {
3479         if ((paddr & 0xffffffff) == 0) {
3480                 /*
3481                  * Don't allow lower 32bits of the RX buffer's
3482                  * physical address to be 0, else it will break
3483                  * hardware pending RSS information delivery
3484                  * detection on RX path.
3485                  */
3486                 return 1;
3487         }
3488         return 0;
3489 }
3490
3491 static int
3492 jme_rxbuf_dma_alloc(struct jme_rxdata *rdata)
3493 {
3494         bus_addr_t lowaddr;
3495         int i, error;
3496
3497         lowaddr = BUS_SPACE_MAXADDR;
3498         if (JME_ENABLE_HWRSS(rdata->jme_sc)) {
3499                 /* jme_rxbuf_dma_filter will be called */
3500                 lowaddr = BUS_SPACE_MAXADDR_32BIT;
3501         }
3502
3503         /* Create tag for Rx buffers. */
3504         error = bus_dma_tag_create(
3505             rdata->jme_sc->jme_cdata.jme_buffer_tag,/* parent */
3506             JME_RX_BUF_ALIGN, 0,        /* algnmnt, boundary */
3507             lowaddr,                    /* lowaddr */
3508             BUS_SPACE_MAXADDR,          /* highaddr */
3509             jme_rxbuf_dma_filter, NULL, /* filter, filterarg */
3510             MCLBYTES,                   /* maxsize */
3511             1,                          /* nsegments */
3512             MCLBYTES,                   /* maxsegsize */
3513             BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK | BUS_DMA_ALIGNED,/* flags */
3514             &rdata->jme_rx_tag);
3515         if (error) {
3516                 device_printf(rdata->jme_sc->jme_dev,
3517                     "could not create %dth Rx DMA tag.\n", rdata->jme_rx_idx);
3518                 return error;
3519         }
3520
3521         /* Create DMA maps for Rx buffers. */
3522         error = bus_dmamap_create(rdata->jme_rx_tag, BUS_DMA_WAITOK,
3523                                   &rdata->jme_rx_sparemap);
3524         if (error) {
3525                 device_printf(rdata->jme_sc->jme_dev,
3526                     "could not create %dth spare Rx dmamap.\n",
3527                     rdata->jme_rx_idx);
3528                 bus_dma_tag_destroy(rdata->jme_rx_tag);
3529                 rdata->jme_rx_tag = NULL;
3530                 return error;
3531         }
3532         for (i = 0; i < rdata->jme_rx_desc_cnt; i++) {
3533                 struct jme_rxdesc *rxd = &rdata->jme_rxdesc[i];
3534
3535                 error = bus_dmamap_create(rdata->jme_rx_tag, BUS_DMA_WAITOK,
3536                                           &rxd->rx_dmamap);
3537                 if (error) {
3538                         int j;
3539
3540                         device_printf(rdata->jme_sc->jme_dev,
3541                             "could not create %dth Rx dmamap "
3542                             "for %dth RX ring.\n", i, rdata->jme_rx_idx);
3543
3544                         for (j = 0; j < i; ++j) {
3545                                 rxd = &rdata->jme_rxdesc[j];
3546                                 bus_dmamap_destroy(rdata->jme_rx_tag,
3547                                                    rxd->rx_dmamap);
3548                         }
3549                         bus_dmamap_destroy(rdata->jme_rx_tag,
3550                                            rdata->jme_rx_sparemap);
3551                         bus_dma_tag_destroy(rdata->jme_rx_tag);
3552                         rdata->jme_rx_tag = NULL;
3553                         return error;
3554                 }
3555         }
3556         return 0;
3557 }
3558
3559 static void
3560 jme_rx_intr(struct jme_softc *sc, uint32_t status)
3561 {
3562         int r;
3563
3564         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
3565                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[r];
3566
3567                 if (status & rdata->jme_rx_coal) {
3568                         lwkt_serialize_enter(&rdata->jme_rx_serialize);
3569                         jme_rxeof(rdata, -1);
3570                         lwkt_serialize_exit(&rdata->jme_rx_serialize);
3571                 }
3572         }
3573 }
3574
3575 static void
3576 jme_enable_rss(struct jme_softc *sc)
3577 {
3578         uint32_t rssc, ind;
3579         uint8_t key[RSSKEY_NREGS * RSSKEY_REGSIZE];
3580         int i;
3581
3582         KASSERT(sc->jme_cdata.jme_rx_ring_cnt == JME_NRXRING_2 ||
3583                 sc->jme_cdata.jme_rx_ring_cnt == JME_NRXRING_4,
3584                 ("%s: invalid # of RX rings (%d)",
3585                  sc->arpcom.ac_if.if_xname, sc->jme_cdata.jme_rx_ring_cnt));
3586
3587         rssc = RSSC_HASH_64_ENTRY;
3588         rssc |= RSSC_HASH_IPV4 | RSSC_HASH_IPV4_TCP;
3589         rssc |= sc->jme_cdata.jme_rx_ring_cnt >> 1;
3590         JME_RSS_DPRINTF(sc, 1, "rssc 0x%08x\n", rssc);
3591         CSR_WRITE_4(sc, JME_RSSC, rssc);
3592
3593         toeplitz_get_key(key, sizeof(key));
3594         for (i = 0; i < RSSKEY_NREGS; ++i) {
3595                 uint32_t keyreg;
3596
3597                 keyreg = RSSKEY_REGVAL(key, i);
3598                 JME_RSS_DPRINTF(sc, 5, "keyreg%d 0x%08x, reg 0x%08x\n",
3599                     i, keyreg, RSSKEY_REG(RSSKEY_NREGS - 1 - i));
3600
3601                 CSR_WRITE_4(sc, RSSKEY_REG(RSSKEY_NREGS - 1 - i), keyreg);
3602         }
3603
3604         /*
3605          * Create redirect table in following fashion:
3606          * (hash & ring_cnt_mask) == rdr_table[(hash & rdr_table_mask)]
3607          */
3608         ind = 0;
3609         for (i = 0; i < RSSTBL_REGSIZE; ++i) {
3610                 int q;
3611
3612                 q = i % sc->jme_cdata.jme_rx_ring_cnt;
3613                 ind |= q << (i * 8);
3614         }
3615         JME_RSS_DPRINTF(sc, 1, "ind 0x%08x\n", ind);
3616
3617         for (i = 0; i < RSSTBL_NREGS; ++i)
3618                 CSR_WRITE_4(sc, RSSTBL_REG(i), ind);
3619 }
3620
3621 static void
3622 jme_disable_rss(struct jme_softc *sc)
3623 {
3624         CSR_WRITE_4(sc, JME_RSSC, RSSC_DIS_RSS);
3625 }
3626
3627 static void
3628 jme_serialize(struct ifnet *ifp, enum ifnet_serialize slz)
3629 {
3630         struct jme_softc *sc = ifp->if_softc;
3631
3632         ifnet_serialize_array_enter(sc->jme_serialize_arr,
3633             sc->jme_serialize_cnt, JME_TX_SERIALIZE, JME_RX_SERIALIZE, slz);
3634 }
3635
3636 static void
3637 jme_deserialize(struct ifnet *ifp, enum ifnet_serialize slz)
3638 {
3639         struct jme_softc *sc = ifp->if_softc;
3640
3641         ifnet_serialize_array_exit(sc->jme_serialize_arr,
3642             sc->jme_serialize_cnt, JME_TX_SERIALIZE, JME_RX_SERIALIZE, slz);
3643 }
3644
3645 static int
3646 jme_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz)
3647 {
3648         struct jme_softc *sc = ifp->if_softc;
3649
3650         return ifnet_serialize_array_try(sc->jme_serialize_arr,
3651             sc->jme_serialize_cnt, JME_TX_SERIALIZE, JME_RX_SERIALIZE, slz);
3652 }
3653
3654 #ifdef INVARIANTS
3655
3656 static void
3657 jme_serialize_assert(struct ifnet *ifp, enum ifnet_serialize slz,
3658     boolean_t serialized)
3659 {
3660         struct jme_softc *sc = ifp->if_softc;
3661
3662         ifnet_serialize_array_assert(sc->jme_serialize_arr,
3663             sc->jme_serialize_cnt, JME_TX_SERIALIZE, JME_RX_SERIALIZE,
3664             slz, serialized);
3665 }
3666
3667 #endif  /* INVARIANTS */
3668
3669 static void
3670 jme_msix_try_alloc(device_t dev)
3671 {
3672         struct jme_softc *sc = device_get_softc(dev);
3673         struct jme_msix_data *msix;
3674         int error, i, r, msix_enable, msix_count;
3675         int offset, offset_def;
3676
3677         msix_count = JME_MSIXCNT(sc->jme_cdata.jme_rx_ring_cnt);
3678         KKASSERT(msix_count <= JME_NMSIX);
3679
3680         msix_enable = device_getenv_int(dev, "msix.enable", jme_msix_enable);
3681
3682         /*
3683          * We leave the 1st MSI-X vector unused, so we
3684          * actually need msix_count + 1 MSI-X vectors.
3685          */
3686         if (!msix_enable || pci_msix_count(dev) < (msix_count + 1))
3687                 return;
3688
3689         for (i = 0; i < msix_count; ++i)
3690                 sc->jme_msix[i].jme_msix_rid = -1;
3691
3692         i = 0;
3693
3694         /*
3695          * Setup status MSI-X
3696          */
3697
3698         msix = &sc->jme_msix[i++];
3699         msix->jme_msix_cpuid = 0;
3700         msix->jme_msix_arg = sc;
3701         msix->jme_msix_func = jme_msix_status;
3702         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
3703                 msix->jme_msix_intrs |=
3704                     sc->jme_cdata.jme_rx_data[r].jme_rx_empty;
3705         }
3706         msix->jme_msix_serialize = &sc->jme_serialize;
3707         ksnprintf(msix->jme_msix_desc, sizeof(msix->jme_msix_desc), "%s sts",
3708             device_get_nameunit(dev));
3709
3710         /*
3711          * Setup TX MSI-X
3712          */
3713
3714         offset_def = device_get_unit(dev) % ncpus2;
3715         offset = device_getenv_int(dev, "msix.txoff", offset_def);
3716         if (offset >= ncpus2) {
3717                 device_printf(dev, "invalid msix.txoff %d, use %d\n",
3718                     offset, offset_def);
3719                 offset = offset_def;
3720         }
3721
3722         msix = &sc->jme_msix[i++];
3723         msix->jme_msix_cpuid = offset;
3724         sc->jme_tx_cpuid = msix->jme_msix_cpuid;
3725         msix->jme_msix_arg = &sc->jme_cdata.jme_tx_data;
3726         msix->jme_msix_func = jme_msix_tx;
3727         msix->jme_msix_intrs = INTR_TXQ_COAL | INTR_TXQ_COAL_TO;
3728         msix->jme_msix_serialize = &sc->jme_cdata.jme_tx_data.jme_tx_serialize;
3729         ksnprintf(msix->jme_msix_desc, sizeof(msix->jme_msix_desc), "%s tx",
3730             device_get_nameunit(dev));
3731
3732         /*
3733          * Setup RX MSI-X
3734          */
3735
3736         if (sc->jme_cdata.jme_rx_ring_cnt == ncpus2) {
3737                 offset = 0;
3738         } else {
3739                 offset_def = (sc->jme_cdata.jme_rx_ring_cnt *
3740                     device_get_unit(dev)) % ncpus2;
3741
3742                 offset = device_getenv_int(dev, "msix.rxoff", offset_def);
3743                 if (offset >= ncpus2 ||
3744                     offset % sc->jme_cdata.jme_rx_ring_cnt != 0) {
3745                         device_printf(dev, "invalid msix.rxoff %d, use %d\n",
3746                             offset, offset_def);
3747                         offset = offset_def;
3748                 }
3749         }
3750
3751         for (r = 0; r < sc->jme_cdata.jme_rx_ring_cnt; ++r) {
3752                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[r];
3753
3754                 msix = &sc->jme_msix[i++];
3755                 msix->jme_msix_cpuid = r + offset;
3756                 KKASSERT(msix->jme_msix_cpuid < ncpus2);
3757                 msix->jme_msix_arg = rdata;
3758                 msix->jme_msix_func = jme_msix_rx;
3759                 msix->jme_msix_intrs = rdata->jme_rx_coal;
3760                 msix->jme_msix_serialize = &rdata->jme_rx_serialize;
3761                 ksnprintf(msix->jme_msix_desc, sizeof(msix->jme_msix_desc),
3762                     "%s rx%d", device_get_nameunit(dev), r);
3763         }
3764
3765         KKASSERT(i == msix_count);
3766
3767         error = pci_setup_msix(dev);
3768         if (error)
3769                 return;
3770
3771         /* Setup jme_msix_cnt early, so we could cleanup */
3772         sc->jme_msix_cnt = msix_count;
3773
3774         for (i = 0; i < msix_count; ++i) {
3775                 msix = &sc->jme_msix[i];
3776
3777                 msix->jme_msix_vector = i + 1;
3778                 error = pci_alloc_msix_vector(dev, msix->jme_msix_vector,
3779                     &msix->jme_msix_rid, msix->jme_msix_cpuid);
3780                 if (error)
3781                         goto back;
3782
3783                 msix->jme_msix_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
3784                     &msix->jme_msix_rid, RF_ACTIVE);
3785                 if (msix->jme_msix_res == NULL) {
3786                         error = ENOMEM;
3787                         goto back;
3788                 }
3789         }
3790
3791         for (i = 0; i < JME_INTR_CNT; ++i) {
3792                 uint32_t intr_mask = (1 << i);
3793                 int x;
3794
3795                 if ((JME_INTRS & intr_mask) == 0)
3796                         continue;
3797
3798                 for (x = 0; x < msix_count; ++x) {
3799                         msix = &sc->jme_msix[x];
3800                         if (msix->jme_msix_intrs & intr_mask) {
3801                                 int reg, shift;
3802
3803                                 reg = i / JME_MSINUM_FACTOR;
3804                                 KKASSERT(reg < JME_MSINUM_CNT);
3805
3806                                 shift = (i % JME_MSINUM_FACTOR) * 4;
3807
3808                                 sc->jme_msinum[reg] |=
3809                                     (msix->jme_msix_vector << shift);
3810
3811                                 break;
3812                         }
3813                 }
3814         }
3815
3816         if (bootverbose) {
3817                 for (i = 0; i < JME_MSINUM_CNT; ++i) {
3818                         device_printf(dev, "MSINUM%d: %#x\n", i,
3819                             sc->jme_msinum[i]);
3820                 }
3821         }
3822
3823         pci_enable_msix(dev);
3824         sc->jme_irq_type = PCI_INTR_TYPE_MSIX;
3825
3826 back:
3827         if (error)
3828                 jme_msix_free(dev);
3829 }
3830
3831 static int
3832 jme_intr_alloc(device_t dev)
3833 {
3834         struct jme_softc *sc = device_get_softc(dev);
3835         u_int irq_flags;
3836
3837         jme_msix_try_alloc(dev);
3838
3839         if (sc->jme_irq_type != PCI_INTR_TYPE_MSIX) {
3840                 sc->jme_irq_type = pci_alloc_1intr(dev, jme_msi_enable,
3841                     &sc->jme_irq_rid, &irq_flags);
3842
3843                 sc->jme_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
3844                     &sc->jme_irq_rid, irq_flags);
3845                 if (sc->jme_irq_res == NULL) {
3846                         device_printf(dev, "can't allocate irq\n");
3847                         return ENXIO;
3848                 }
3849         }
3850         return 0;
3851 }
3852
3853 static void
3854 jme_msix_free(device_t dev)
3855 {
3856         struct jme_softc *sc = device_get_softc(dev);
3857         int i;
3858
3859         KKASSERT(sc->jme_msix_cnt > 1);
3860
3861         for (i = 0; i < sc->jme_msix_cnt; ++i) {
3862                 struct jme_msix_data *msix = &sc->jme_msix[i];
3863
3864                 if (msix->jme_msix_res != NULL) {
3865                         bus_release_resource(dev, SYS_RES_IRQ,
3866                             msix->jme_msix_rid, msix->jme_msix_res);
3867                         msix->jme_msix_res = NULL;
3868                 }
3869                 if (msix->jme_msix_rid >= 0) {
3870                         pci_release_msix_vector(dev, msix->jme_msix_rid);
3871                         msix->jme_msix_rid = -1;
3872                 }
3873         }
3874         pci_teardown_msix(dev);
3875 }
3876
3877 static void
3878 jme_intr_free(device_t dev)
3879 {
3880         struct jme_softc *sc = device_get_softc(dev);
3881
3882         if (sc->jme_irq_type != PCI_INTR_TYPE_MSIX) {
3883                 if (sc->jme_irq_res != NULL) {
3884                         bus_release_resource(dev, SYS_RES_IRQ, sc->jme_irq_rid,
3885                                              sc->jme_irq_res);
3886                 }
3887                 if (sc->jme_irq_type == PCI_INTR_TYPE_MSI)
3888                         pci_release_msi(dev);
3889         } else {
3890                 jme_msix_free(dev);
3891         }
3892 }
3893
3894 static void
3895 jme_msix_tx(void *xtdata)
3896 {
3897         struct jme_txdata *tdata = xtdata;
3898         struct jme_softc *sc = tdata->jme_sc;
3899         struct ifnet *ifp = &sc->arpcom.ac_if;
3900
3901         ASSERT_SERIALIZED(&tdata->jme_tx_serialize);
3902
3903         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, INTR_TXQ_COAL | INTR_TXQ_COAL_TO);
3904
3905         CSR_WRITE_4(sc, JME_INTR_STATUS,
3906             INTR_TXQ_COAL | INTR_TXQ_COAL_TO | INTR_TXQ_COMP);
3907
3908         if (ifp->if_flags & IFF_RUNNING) {
3909                 jme_txeof(tdata);
3910                 if (!ifq_is_empty(&ifp->if_snd))
3911                         if_devstart(ifp);
3912         }
3913
3914         CSR_WRITE_4(sc, JME_INTR_MASK_SET, INTR_TXQ_COAL | INTR_TXQ_COAL_TO);
3915 }
3916
3917 static void
3918 jme_msix_rx(void *xrdata)
3919 {
3920         struct jme_rxdata *rdata = xrdata;
3921         struct jme_softc *sc = rdata->jme_sc;
3922         struct ifnet *ifp = &sc->arpcom.ac_if;
3923
3924         ASSERT_SERIALIZED(&rdata->jme_rx_serialize);
3925
3926         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, rdata->jme_rx_coal);
3927
3928         CSR_WRITE_4(sc, JME_INTR_STATUS,
3929             rdata->jme_rx_coal | rdata->jme_rx_comp);
3930
3931         if (ifp->if_flags & IFF_RUNNING)
3932                 jme_rxeof(rdata, -1);
3933
3934         CSR_WRITE_4(sc, JME_INTR_MASK_SET, rdata->jme_rx_coal);
3935 }
3936
3937 static void
3938 jme_msix_status(void *xsc)
3939 {
3940         struct jme_softc *sc = xsc;
3941         struct ifnet *ifp = &sc->arpcom.ac_if;
3942         uint32_t status;
3943
3944         ASSERT_SERIALIZED(&sc->jme_serialize);
3945
3946         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, INTR_RXQ_DESC_EMPTY);
3947
3948         status = CSR_READ_4(sc, JME_INTR_STATUS);
3949
3950         if (status & INTR_RXQ_DESC_EMPTY) {
3951                 CSR_WRITE_4(sc, JME_INTR_STATUS, status & INTR_RXQ_DESC_EMPTY);
3952                 if (ifp->if_flags & IFF_RUNNING)
3953                         jme_rx_restart(sc, status);
3954         }
3955
3956         CSR_WRITE_4(sc, JME_INTR_MASK_SET, INTR_RXQ_DESC_EMPTY);
3957 }
3958
3959 static void
3960 jme_rx_restart(struct jme_softc *sc, uint32_t status)
3961 {
3962         int i;
3963
3964         for (i = 0; i < sc->jme_cdata.jme_rx_ring_cnt; ++i) {
3965                 struct jme_rxdata *rdata = &sc->jme_cdata.jme_rx_data[i];
3966
3967                 if (status & rdata->jme_rx_empty) {
3968                         lwkt_serialize_enter(&rdata->jme_rx_serialize);
3969                         jme_rxeof(rdata, -1);
3970 #ifdef JME_RSS_DEBUG
3971                         rdata->jme_rx_emp++;
3972 #endif
3973                         lwkt_serialize_exit(&rdata->jme_rx_serialize);
3974                 }
3975         }
3976         CSR_WRITE_4(sc, JME_RXCSR, sc->jme_rxcsr | RXCSR_RX_ENB |
3977             RXCSR_RXQ_START);
3978 }
3979
3980 static void
3981 jme_set_msinum(struct jme_softc *sc)
3982 {
3983         int i;
3984
3985         for (i = 0; i < JME_MSINUM_CNT; ++i)
3986                 CSR_WRITE_4(sc, JME_MSINUM(i), sc->jme_msinum[i]);
3987 }
3988
3989 static int
3990 jme_intr_setup(device_t dev)
3991 {
3992         struct jme_softc *sc = device_get_softc(dev);
3993         int error;
3994
3995         if (sc->jme_irq_type == PCI_INTR_TYPE_MSIX)
3996                 return jme_msix_setup(dev);
3997
3998         error = bus_setup_intr(dev, sc->jme_irq_res, INTR_MPSAFE,
3999             jme_intr, sc, &sc->jme_irq_handle, &sc->jme_serialize);
4000         if (error) {
4001                 device_printf(dev, "could not set up interrupt handler.\n");
4002                 return error;
4003         }
4004         sc->jme_tx_cpuid = rman_get_cpuid(sc->jme_irq_res);
4005
4006         return 0;
4007 }
4008
4009 static void
4010 jme_intr_teardown(device_t dev)
4011 {
4012         struct jme_softc *sc = device_get_softc(dev);
4013
4014         if (sc->jme_irq_type == PCI_INTR_TYPE_MSIX)
4015                 jme_msix_teardown(dev, sc->jme_msix_cnt);
4016         else
4017                 bus_teardown_intr(dev, sc->jme_irq_res, sc->jme_irq_handle);
4018 }
4019
4020 static int
4021 jme_msix_setup(device_t dev)
4022 {
4023         struct jme_softc *sc = device_get_softc(dev);
4024         int x;
4025
4026         for (x = 0; x < sc->jme_msix_cnt; ++x) {
4027                 struct jme_msix_data *msix = &sc->jme_msix[x];
4028                 int error;
4029
4030                 error = bus_setup_intr_descr(dev, msix->jme_msix_res,
4031                     INTR_MPSAFE, msix->jme_msix_func, msix->jme_msix_arg,
4032                     &msix->jme_msix_handle, msix->jme_msix_serialize,
4033                     msix->jme_msix_desc);
4034                 if (error) {
4035                         device_printf(dev, "could not set up %s "
4036                             "interrupt handler.\n", msix->jme_msix_desc);
4037                         jme_msix_teardown(dev, x);
4038                         return error;
4039                 }
4040         }
4041         return 0;
4042 }
4043
4044 static void
4045 jme_msix_teardown(device_t dev, int msix_count)
4046 {
4047         struct jme_softc *sc = device_get_softc(dev);
4048         int x;
4049
4050         for (x = 0; x < msix_count; ++x) {
4051                 struct jme_msix_data *msix = &sc->jme_msix[x];
4052
4053                 bus_teardown_intr(dev, msix->jme_msix_res,
4054                     msix->jme_msix_handle);
4055         }
4056 }
4057
4058 static void
4059 jme_serialize_skipmain(struct jme_softc *sc)
4060 {
4061         lwkt_serialize_array_enter(sc->jme_serialize_arr,
4062             sc->jme_serialize_cnt, 1);
4063 }
4064
4065 static void
4066 jme_deserialize_skipmain(struct jme_softc *sc)
4067 {
4068         lwkt_serialize_array_exit(sc->jme_serialize_arr,
4069             sc->jme_serialize_cnt, 1);
4070 }
4071
4072 static void
4073 jme_enable_intr(struct jme_softc *sc)
4074 {
4075         int i;
4076
4077         for (i = 0; i < sc->jme_serialize_cnt; ++i)
4078                 lwkt_serialize_handler_enable(sc->jme_serialize_arr[i]);
4079
4080         CSR_WRITE_4(sc, JME_INTR_MASK_SET, JME_INTRS);
4081 }
4082
4083 static void
4084 jme_disable_intr(struct jme_softc *sc)
4085 {
4086         int i;
4087
4088         CSR_WRITE_4(sc, JME_INTR_MASK_CLR, JME_INTRS);
4089
4090         for (i = 0; i < sc->jme_serialize_cnt; ++i)
4091                 lwkt_serialize_handler_disable(sc->jme_serialize_arr[i]);
4092 }