2 * Intel RS-82543GC Gigabit Ethernet Controller
3 * as found on the Intel PRO/1000[FT] Server Adapter.
4 * The older non-[FT] cards use the 82542 (LSI L2A1157) chip; no attempt
5 * is made to handle the older chip although it should be possible.
6 * The datasheet is not very clear about running on a big-endian system
7 * and this driver assumes little-endian throughout.
14 #include "../port/lib.h"
19 #include "../port/error.h"
20 #include "../port/netif.h"
25 Ctrl = 0x00000000, /* Device Control */
26 Status = 0x00000008, /* Device Status */
27 Eecd = 0x00000010, /* EEPROM/Flash Control/Data */
28 Ctrlext = 0x00000018, /* Extended Device Control */
29 Mdic = 0x00000020, /* MDI Control */
30 Fcal = 0x00000028, /* Flow Control Address Low */
31 Fcah = 0x0000002C, /* Flow Control Address High */
32 Fct = 0x00000030, /* Flow Control Type */
33 Icr = 0x000000C0, /* Interrupt Cause Read */
34 Ics = 0x000000C8, /* Interrupt Cause Set */
35 Ims = 0x000000D0, /* Interrupt Mask Set/Read */
36 Imc = 0x000000D8, /* Interrupt mask Clear */
37 Rctl = 0x00000100, /* Receive Control */
38 Fcttv = 0x00000170, /* Flow Control Transmit Timer Value */
39 Txcw = 0x00000178, /* Transmit configuration word reg. */
40 Rxcw = 0x00000180, /* Receive configuration word reg. */
41 Tctl = 0x00000400, /* Transmit Control */
42 Tipg = 0x00000410, /* Transmit IPG */
43 Tbt = 0x00000448, /* Transmit Burst Timer */
44 Ait = 0x00000458, /* Adaptive IFS Throttle */
45 Fcrtl = 0x00002160, /* Flow Control RX Threshold Low */
46 Fcrth = 0x00002168, /* Flow Control Rx Threshold High */
47 Rdfh = 0x00002410, /* Receive data fifo head */
48 Rdft = 0x00002418, /* Receive data fifo tail */
49 Rdfhs = 0x00002420, /* Receive data fifo head saved */
50 Rdfts = 0x00002428, /* Receive data fifo tail saved */
51 Rdfpc = 0x00002430, /* Receive data fifo packet count */
52 Rdbal = 0x00002800, /* Rdesc Base Address Low */
53 Rdbah = 0x00002804, /* Rdesc Base Address High */
54 Rdlen = 0x00002808, /* Receive Descriptor Length */
55 Rdh = 0x00002810, /* Receive Descriptor Head */
56 Rdt = 0x00002818, /* Receive Descriptor Tail */
57 Rdtr = 0x00002820, /* Receive Descriptor Timer Ring */
58 Rxdctl = 0x00002828, /* Receive Descriptor Control */
59 Txdmac = 0x00003000, /* Transfer DMA Control */
60 Ett = 0x00003008, /* Early Transmit Control */
61 Tdfh = 0x00003410, /* Transmit data fifo head */
62 Tdft = 0x00003418, /* Transmit data fifo tail */
63 Tdfhs = 0x00003420, /* Transmit data Fifo Head saved */
64 Tdfts = 0x00003428, /* Transmit data fifo tail saved */
65 Tdfpc = 0x00003430, /* Trasnmit data Fifo packet count */
66 Tdbal = 0x00003800, /* Tdesc Base Address Low */
67 Tdbah = 0x00003804, /* Tdesc Base Address High */
68 Tdlen = 0x00003808, /* Transmit Descriptor Length */
69 Tdh = 0x00003810, /* Transmit Descriptor Head */
70 Tdt = 0x00003818, /* Transmit Descriptor Tail */
71 Tidv = 0x00003820, /* Transmit Interrupt Delay Value */
72 Txdctl = 0x00003828, /* Transmit Descriptor Control */
74 Statistics = 0x00004000, /* Start of Statistics Area */
75 Gorcl = 0x88/4, /* Good Octets Received Count */
76 Gotcl = 0x90/4, /* Good Octets Transmitted Count */
77 Torl = 0xC0/4, /* Total Octets Received */
78 Totl = 0xC8/4, /* Total Octets Transmitted */
81 Rxcsum = 0x00005000, /* Receive Checksum Control */
82 Mta = 0x00005200, /* Multicast Table Array */
83 Ral = 0x00005400, /* Receive Address Low */
84 Rah = 0x00005404, /* Receive Address High */
88 Bem = 0x00000002, /* Big Endian Mode */
89 Prior = 0x00000004, /* Priority on the PCI bus */
90 Lrst = 0x00000008, /* Link Reset */
91 Asde = 0x00000020, /* Auto-Speed Detection Enable */
92 Slu = 0x00000040, /* Set Link Up */
93 Ilos = 0x00000080, /* Invert Loss of Signal (LOS) */
94 Frcspd = 0x00000800, /* Force Speed */
95 Frcdplx = 0x00001000, /* Force Duplex */
96 Swdpinslo = 0x003C0000, /* Software Defined Pins - lo nibble */
100 Swdpin3 = 0x00200000,
101 Swdpiolo = 0x03C00000, /* Software Defined I/O Pins */
102 Swdpio0 = 0x00400000,
103 Swdpio1 = 0x00800000,
104 Swdpio2 = 0x01000000,
105 Swdpio3 = 0x02000000,
106 Devrst = 0x04000000, /* Device Reset */
107 Rfce = 0x08000000, /* Receive Flow Control Enable */
108 Tfce = 0x10000000, /* Transmit Flow Control Enable */
109 Vme = 0x40000000, /* VLAN Mode Enable */
113 Lu = 0x00000002, /* Link Up */
114 Tckok = 0x00000004, /* Transmit clock is running */
115 Rbcok = 0x00000008, /* Receive clock is running */
116 Txoff = 0x00000010, /* Transmission Paused */
117 Tbimode = 0x00000020, /* TBI Mode Indication */
118 SpeedMASK = 0x000000C0,
119 Speed10 = 0x00000000, /* 10Mb/s */
120 Speed100 = 0x00000040, /* 100Mb/s */
121 Speed1000 = 0x00000080, /* 1000Mb/s */
122 Mtxckok = 0x00000400, /* MTX clock is running */
123 Pci66 = 0x00000800, /* PCI Bus speed indication */
124 Bus64 = 0x00001000, /* PCI Bus width indication */
127 enum { /* Ctrl and Status */
128 Fd = 0x00000001, /* Full-Duplex */
129 AsdvMASK = 0x00000300,
130 Asdv10 = 0x00000000, /* 10Mb/s */
131 Asdv100 = 0x00000100, /* 100Mb/s */
132 Asdv1000 = 0x00000200, /* 1000Mb/s */
136 Sk = 0x00000001, /* Clock input to the EEPROM */
137 Cs = 0x00000002, /* Chip Select */
138 Di = 0x00000004, /* Data Input to the EEPROM */
139 Do = 0x00000008, /* Data Output from the EEPROM */
143 Gpien = 0x0000000F, /* General Purpose Interrupt Enables */
144 Swdpinshi = 0x000000F0, /* Software Defined Pins - hi nibble */
145 Swdpiohi = 0x00000F00, /* Software Defined Pins - I or O */
146 Asdchk = 0x00001000, /* ASD Check */
147 Eerst = 0x00002000, /* EEPROM Reset */
148 Ips = 0x00004000, /* Invert Power State */
149 Spdbyps = 0x00008000, /* Speed Select Bypass */
152 enum { /* EEPROM content offsets */
153 Ea = 0x00, /* Ethernet Address */
154 Cf = 0x03, /* Compatibility Field */
155 Pba = 0x08, /* Printed Board Assembly number */
156 Icw1 = 0x0A, /* Initialization Control Word 1 */
157 Sid = 0x0B, /* Subsystem ID */
158 Svid = 0x0C, /* Subsystem Vendor ID */
159 Did = 0x0D, /* Device ID */
160 Vid = 0x0E, /* Vendor ID */
161 Icw2 = 0x0F, /* Initialization Control Word 2 */
165 MDIdMASK = 0x0000FFFF, /* Data */
167 MDIrMASK = 0x001F0000, /* PHY Register Address */
169 MDIpMASK = 0x03E00000, /* PHY Address */
171 MDIwop = 0x04000000, /* Write Operation */
172 MDIrop = 0x08000000, /* Read Operation */
173 MDIready = 0x10000000, /* End of Transaction */
174 MDIie = 0x20000000, /* Interrupt Enable */
175 MDIe = 0x40000000, /* Error */
178 enum { /* Icr, Ics, Ims, Imc */
179 Txdw = 0x00000001, /* Transmit Descriptor Written Back */
180 Txqe = 0x00000002, /* Transmit Queue Empty */
181 Lsc = 0x00000004, /* Link Status Change */
182 Rxseq = 0x00000008, /* Receive Sequence Error */
183 Rxdmt0 = 0x00000010, /* Rdesc Minimum Threshold Reached */
184 Rxo = 0x00000040, /* Receiver Overrun */
185 Rxt0 = 0x00000080, /* Receiver Timer Interrupt */
186 Mdac = 0x00000200, /* MDIO Access Completed */
187 Rxcfg = 0x00000400, /* Receiving /C/ ordered sets */
188 Gpi0 = 0x00000800, /* General Purpose Interrupts */
195 Ane = 0x80000000, /* Autonegotiate enable */
196 Np = 0x00008000, /* Next Page */
197 As = 0x00000100, /* Asymmetric Flow control desired */
198 Ps = 0x00000080, /* Pause supported */
199 Hd = 0x00000040, /* Half duplex supported */
200 TxcwFd = 0x00000020, /* Full Duplex supported */
204 Rxword = 0x0000FFFF, /* Data from auto-negotiation process */
205 Rxnocarrier = 0x04000000, /* Carrier Sense indication */
206 Rxinvalid = 0x08000000, /* Invalid Symbol during configuration */
207 Rxchange = 0x10000000, /* Change to the Rxword indication */
208 Rxconfig = 0x20000000, /* /C/ order set reception indication */
209 Rxsync = 0x40000000, /* Lost bit synchronization indication */
210 Anc = 0x80000000, /* Auto Negotiation Complete */
214 Rrst = 0x00000001, /* Receiver Software Reset */
215 Ren = 0x00000002, /* Receiver Enable */
216 Sbp = 0x00000004, /* Store Bad Packets */
217 Upe = 0x00000008, /* Unicast Promiscuous Enable */
218 Mpe = 0x00000010, /* Multicast Promiscuous Enable */
219 Lpe = 0x00000020, /* Long Packet Reception Enable */
220 LbmMASK = 0x000000C0, /* Loopback Mode */
221 LbmOFF = 0x00000000, /* No Loopback */
222 LbmTBI = 0x00000040, /* TBI Loopback */
223 LbmMII = 0x00000080, /* GMII/MII Loopback */
224 LbmXCVR = 0x000000C0, /* Transceiver Loopback */
225 RdtmsMASK = 0x00000300, /* Rdesc Minimum Threshold Size */
226 RdtmsHALF = 0x00000000, /* Threshold is 1/2 Rdlen */
227 RdtmsQUARTER = 0x00000100, /* Threshold is 1/4 Rdlen */
228 RdtmsEIGHTH = 0x00000200, /* Threshold is 1/8 Rdlen */
229 MoMASK = 0x00003000, /* Multicast Offset */
230 Bam = 0x00008000, /* Broadcast Accept Mode */
231 BsizeMASK = 0x00030000, /* Receive Buffer Size */
232 Bsize2048 = 0x00000000, /* Bsex = 0 */
233 Bsize1024 = 0x00010000, /* Bsex = 0 */
234 Bsize512 = 0x00020000, /* Bsex = 0 */
235 Bsize256 = 0x00030000, /* Bsex = 0 */
236 Bsize16384 = 0x00010000, /* Bsex = 1 */
237 Vfe = 0x00040000, /* VLAN Filter Enable */
238 Cfien = 0x00080000, /* Canonical Form Indicator Enable */
239 Cfi = 0x00100000, /* Canonical Form Indicator value */
240 Dpf = 0x00400000, /* Discard Pause Frames */
241 Pmcf = 0x00800000, /* Pass MAC Control Frames */
242 Bsex = 0x02000000, /* Buffer Size Extension */
243 Secrc = 0x04000000, /* Strip CRC from incoming packet */
247 Trst = 0x00000001, /* Transmitter Software Reset */
248 Ten = 0x00000002, /* Transmit Enable */
249 Psp = 0x00000008, /* Pad Short Packets */
250 CtMASK = 0x00000FF0, /* Collision Threshold */
252 ColdMASK = 0x003FF000, /* Collision Distance */
254 Swxoff = 0x00400000, /* Sofware XOFF Transmission */
255 Pbe = 0x00800000, /* Packet Burst Enable */
256 Rtlc = 0x01000000, /* Re-transmit on Late Collision */
257 Nrtu = 0x02000000, /* No Re-transmit on Underrrun */
260 enum { /* [RT]xdctl */
261 PthreshMASK = 0x0000003F, /* Prefetch Threshold */
263 HthreshMASK = 0x00003F00, /* Host Threshold */
265 WthreshMASK = 0x003F0000, /* Writeback Threshold */
267 Gran = 0x00000000, /* Granularity */
268 RxGran = 0x01000000, /* Granularity */
272 PcssMASK = 0x000000FF, /* Packet Checksum Start */
274 Ipofl = 0x00000100, /* IP Checksum Off-load Enable */
275 Tuofl = 0x00000200, /* TCP/UDP Checksum Off-load Enable */
278 enum { /* Receive Delay Timer Ring */
279 Fpd = 0x80000000, /* Flush partial Descriptor Block */
282 typedef struct Rdesc { /* Receive Descriptor */
291 enum { /* Rdesc status */
292 Rdd = 0x01, /* Descriptor Done */
293 Reop = 0x02, /* End of Packet */
294 Ixsm = 0x04, /* Ignore Checksum Indication */
295 Vp = 0x08, /* Packet is 802.1Q (matched VET) */
296 Tcpcs = 0x20, /* TCP Checksum Calculated on Packet */
297 Ipcs = 0x40, /* IP Checksum Calculated on Packet */
298 Pif = 0x80, /* Passed in-exact filter */
301 enum { /* Rdesc errors */
302 Ce = 0x01, /* CRC Error or Alignment Error */
303 Se = 0x02, /* Symbol Error */
304 Seq = 0x04, /* Sequence Error */
305 Cxe = 0x10, /* Carrier Extension Error */
306 Tcpe = 0x20, /* TCP/UDP Checksum Error */
307 Ipe = 0x40, /* IP Checksum Error */
308 Rxe = 0x80, /* RX Data Error */
311 typedef struct Tdesc { /* Legacy+Normal Transmit Descriptor */
313 uint control; /* varies with descriptor type */
314 uint status; /* varies with descriptor type */
317 enum { /* Tdesc control */
318 CsoMASK = 0x00000F00, /* Checksum Offset */
320 Teop = 0x01000000, /* End of Packet */
321 Ifcs = 0x02000000, /* Insert FCS */
322 Ic = 0x04000000, /* Insert Checksum (Dext == 0) */
323 Tse = 0x04000000, /* TCP Segmentaion Enable (Dext == 1) */
324 Rs = 0x08000000, /* Report Status */
325 Rps = 0x10000000, /* Report Status Sent */
326 Dext = 0x20000000, /* Extension (!legacy) */
327 Vle = 0x40000000, /* VLAN Packet Enable */
328 Ide = 0x80000000, /* Interrupt Delay Enable */
331 enum { /* Tdesc status */
332 Tdd = 0x00000001, /* Descriptor Done */
333 Ec = 0x00000002, /* Excess Collisions */
334 Lc = 0x00000004, /* Late Collision */
335 Tu = 0x00000008, /* Transmit Underrun */
336 CssMASK = 0x0000FF00, /* Checksum Start Field */
341 Nrdesc = 256, /* multiple of 8 */
342 Ntdesc = 256, /* multiple of 8 */
343 Nblocks = 4098, /* total number of blocks to use */
352 typedef struct Ctlr Ctlr;
353 typedef struct Ctlr {
363 int im; /* interrupt mask */
366 uint statistics[Nstatistics];
369 Rdesc* rdba; /* receive descriptor base address */
370 Block* rb[Nrdesc]; /* receive buffers */
371 int rdh; /* receive descriptor head */
372 int rdt; /* receive descriptor tail */
373 Block** freehead; /* points to long or short head */
376 Tdesc* tdba; /* transmit descriptor base address */
377 Block* tb[Ntdesc]; /* transmit buffers */
378 int tdh; /* transmit descriptor head */
379 int tdt; /* transmit descriptor tail */
380 int txstalled; /* count of times unable to send */
386 ulong multimask[128]; /* bit mask for multicast addresses */
389 static Ctlr* gc82543ctlrhead;
390 static Ctlr* gc82543ctlrtail;
392 static Lock freelistlock;
393 static Block* freeShortHead;
394 static Block* freeJumboHead;
396 #define csr32r(c, r) (*((c)->nic+((r)/4)))
397 #define csr32w(c, r, v) (*((c)->nic+((r)/4)) = (v))
399 static void gc82543watchdog(void* arg);
402 gc82543attach(Ether* edev)
411 * adjust queue length depending on speed;
413 * more needed here...
417 if(ctlr->started == 0){
419 snprint(name, KNAMELEN, "#l%d82543", edev->ctlrno);
420 kproc(name, gc82543watchdog, edev);
422 unlock(&ctlr->slock);
424 ctl = csr32r(ctlr, Rctl)|Ren;
425 csr32w(ctlr, Rctl, ctl);
426 ctl = csr32r(ctlr, Tctl)|Ten;
427 csr32w(ctlr, Tctl, ctl);
429 csr32w(ctlr, Ims, ctlr->im);
432 static char* statistics[Nstatistics] = {
439 "Excessive Collisions",
440 "Multiple Collision",
448 "Carrier Extension Error",
449 "Receive Error Length",
455 "FC Received Unsupported",
456 "Packets Received (64 Bytes)",
457 "Packets Received (65-127 Bytes)",
458 "Packets Received (128-255 Bytes)",
459 "Packets Received (256-511 Bytes)",
460 "Packets Received (512-1023 Bytes)",
461 "Packets Received (1024-1522 Bytes)",
462 "Good Packets Received",
463 "Broadcast Packets Received",
464 "Multicast Packets Received",
465 "Good Packets Transmitted",
467 "Good Octets Received",
469 "Good Octets Transmitted",
473 "Receive No Buffers",
481 "Total Octets Received",
483 "Total Octets Transmitted",
485 "Total Packets Received",
486 "Total Packets Transmitted",
487 "Packets Transmitted (64 Bytes)",
488 "Packets Transmitted (65-127 Bytes)",
489 "Packets Transmitted (128-255 Bytes)",
490 "Packets Transmitted (256-511 Bytes)",
491 "Packets Transmitted (512-1023 Bytes)",
492 "Packets Transmitted (1024-1522 Bytes)",
493 "Multicast Packets Transmitted",
494 "Broadcast Packets Transmitted",
495 "TCP Segmentation Context Transmitted",
496 "TCP Segmentation Context Fail",
500 gc82543ifstat(Ether* edev, void* a, long n, ulong offset)
507 p = smalloc(READSTR);
512 for(i = 0; i < Nstatistics; i++){
513 r = csr32r(ctlr, Statistics+i*4);
514 if((s = statistics[i]) == nil)
522 ruvl += ((uvlong)csr32r(ctlr, Statistics+(i+1)*4))<<32;
524 tuvl += ctlr->statistics[i];
525 tuvl += ((uvlong)ctlr->statistics[i+1])<<32;
528 ctlr->statistics[i] = tuvl;
529 ctlr->statistics[i+1] = tuvl>>32;
530 l += snprint(p+l, READSTR-l, "%s: %llud %llud\n",
536 ctlr->statistics[i] += r;
537 if(ctlr->statistics[i] == 0)
539 l += snprint(p+l, READSTR-l, "%s: %ud %ud\n",
540 s, ctlr->statistics[i], r);
545 l += snprint(p+l, READSTR-l, "eeprom:");
546 for(i = 0; i < 0x40; i++){
547 if(i && ((i & 0x07) == 0))
548 l += snprint(p+l, READSTR-l, "\n ");
549 l += snprint(p+l, READSTR-l, " %4.4uX", ctlr->eeprom[i]);
552 snprint(p+l, READSTR-l, "\ntxstalled %d\n", ctlr->txstalled);
553 n = readstr(offset, a, n, p);
555 unlock(&ctlr->slock);
561 gc82543promiscuous(void* arg, int on)
570 rctl = csr32r(ctlr, Rctl);
571 rctl &= ~MoMASK; /* make sure we're using bits 47:36 */
576 csr32w(ctlr, Rctl, rctl);
580 gc82543multicast(void* arg, uchar* addr, int on)
589 bit = ((addr[5] & 1)<<4)|(addr[4]>>4);
591 ctlr->multimask[x] |= 1<<bit;
593 ctlr->multimask[x] &= ~(1<<bit);
595 csr32w(ctlr, Mta+x*4, ctlr->multimask[x]);
599 gc82543ctl(Ether* edev, void* buf, long n)
611 cb = parsecmd(buf, n);
614 else if(cistrcmp(cb->f[0], "auto") == 0){
615 ctrl = csr32r(ctlr, Ctrl);
616 if(cistrcmp(cb->f[1], "off") == 0){
617 csr32w(ctlr, Txcw, ctlr->txcw & ~Ane);
623 csr32w(ctlr, Ctrl, ctrl);
625 else if(cistrcmp(cb->f[1], "on") == 0){
626 csr32w(ctlr, Txcw, ctlr->txcw);
628 csr32w(ctlr, Ctrl, ctrl);
633 else if(cistrcmp(cb->f[0], "clear") == 0){
634 if(cistrcmp(cb->f[1], "stats") == 0){
635 for(i = 0; i < Nstatistics; i++)
636 ctlr->statistics[i] = 0;
643 unlock(&ctlr->slock);
646 return (r == 0) ? n : r;
650 gc82543txinit(Ctlr* ctlr)
656 tdsize = ROUND(Ntdesc*sizeof(Tdesc), 4096);
658 if(ctlr->tdba == nil)
659 ctlr->tdba = xspanalloc(tdsize, 32, 0);
661 for(i = 0; i < Ntdesc; i++){
668 memset(&ctlr->tdba[i], 0, sizeof(Tdesc));
671 csr32w(ctlr, Tdbal, PCIWADDR(ctlr->tdba));
672 csr32w(ctlr, Tdbah, 0);
673 csr32w(ctlr, Tdlen, Ntdesc*sizeof(Tdesc));
676 * set the ring head and tail pointers.
679 csr32w(ctlr, Tdh, ctlr->tdh);
681 csr32w(ctlr, Tdt, ctlr->tdt);
683 csr32w(ctlr, Tipg, (6<<20)|(8<<10)|6);
684 csr32w(ctlr, Tidv, 128);
685 csr32w(ctlr, Ait, 0);
686 csr32w(ctlr, Txdmac, 0);
687 csr32w(ctlr, Txdctl, Gran|(4<<WthreshSHIFT)|(1<<HthreshSHIFT)|16);
688 csr32w(ctlr, Tctl, (0x0F<<CtSHIFT)|Psp|(6<<ColdSHIFT));
694 gc82543transmit(Ether* edev)
703 ilock(&ctlr->tdlock);
707 * Free any completed packets
709 tdesc = &ctlr->tdba[tdh];
710 if(!(tdesc->status & Tdd))
712 memset(tdesc, 0, sizeof(Tdesc));
713 bpp = &ctlr->tb[tdh];
719 tdh = NEXT(tdh, Ntdesc);
722 s = csr32r(ctlr, Status);
725 * Try to fill the ring back up
726 * but only if link is up and transmission isn't paused.
728 if((s & (Txoff|Lu)) == Lu){
730 while(NEXT(tdt, Ntdesc) != tdh){
731 if((bp = qget(edev->oq)) == nil)
734 tdesc = &ctlr->tdba[tdt];
735 tdesc->addr[0] = PCIWADDR(bp->rp);
736 tdesc->control = Ide|Rs|Ifcs|Teop|BLEN(bp);
738 tdt = NEXT(tdt, Ntdesc);
741 if(tdt != ctlr->tdt){
743 csr32w(ctlr, Tdt, tdt);
749 iunlock(&ctlr->tdlock);
753 gc82543allocb(Ctlr* ctlr)
757 ilock(&freelistlock);
758 if((bp = *(ctlr->freehead)) != nil){
759 *(ctlr->freehead) = bp->next;
762 iunlock(&freelistlock);
767 gc82543replenish(Ctlr* ctlr)
773 ilock(&ctlr->rdlock);
775 while(NEXT(rdt, Nrdesc) != ctlr->rdh){
776 rdesc = &ctlr->rdba[rdt];
777 if(ctlr->rb[rdt] == nil){
778 bp = gc82543allocb(ctlr);
780 iprint("no available buffers\n");
784 rdesc->addr[0] = PCIWADDR(bp->rp);
789 rdt = NEXT(rdt, Nrdesc);
792 csr32w(ctlr, Rdt, rdt);
793 iunlock(&ctlr->rdlock);
797 gc82543rxinit(Ctlr* ctlr)
801 csr32w(ctlr, Rctl, Dpf|Bsize2048|Bam|RdtmsHALF);
804 * Allocate the descriptor ring and load its
805 * address and length into the NIC.
807 rdsize = ROUND(Nrdesc*sizeof(Rdesc), 4096);
808 if(ctlr->rdba == nil)
809 ctlr->rdba = xspanalloc(rdsize, 32, 0);
810 memset(ctlr->rdba, 0, rdsize);
815 csr32w(ctlr, Rdtr, Fpd|64);
816 csr32w(ctlr, Rdbal, PCIWADDR(ctlr->rdba));
817 csr32w(ctlr, Rdbah, 0);
818 csr32w(ctlr, Rdlen, Nrdesc*sizeof(Rdesc));
819 csr32w(ctlr, Rdh, 0);
820 csr32w(ctlr, Rdt, 0);
821 for(i = 0; i < Nrdesc; i++){
822 if(ctlr->rb[i] != nil){
827 gc82543replenish(ctlr);
829 csr32w(ctlr, Rxdctl, RxGran|(8<<WthreshSHIFT)|(4<<HthreshSHIFT)|1);
830 ctlr->im |= Rxt0|Rxo|Rxdmt0|Rxseq;
834 gc82543recv(Ether* edev, int icr)
845 rdesc = &ctlr->rdba[rdh];
847 if(!(rdesc->status & Rdd))
850 if((rdesc->status & Reop) && rdesc->errors == 0){
853 bp->wp += rdesc->length;
855 etheriq(edev, bp, 1);
858 if(ctlr->rb[rdh] != nil){
859 /* either non eop packet, or error */
860 freeb(ctlr->rb[rdh]);
863 memset(rdesc, 0, sizeof(Rdesc));
865 rdh = NEXT(rdh, Nrdesc);
870 gc82543replenish(ctlr);
874 freegc82543short(Block *bp)
876 ilock(&freelistlock);
877 /* reset read/write pointer to proper positions */
878 bp->rp = bp->lim - ROUND(SBLOCKSIZE, BLOCKALIGN);
880 bp->next = freeShortHead;
882 iunlock(&freelistlock);
886 freegc82532jumbo(Block *bp)
888 ilock(&freelistlock);
889 /* reset read/write pointer to proper positions */
890 bp->rp = bp->lim - ROUND(JBLOCKSIZE, BLOCKALIGN);
892 bp->next = freeJumboHead;
894 iunlock(&freelistlock);
902 ctrl = csr32r(ctlr, Ctrl);
904 if((ctrl & Swdpin1) ||
905 ((csr32r(ctlr, Rxcw) & Rxconfig) && !(csr32r(ctlr, Txcw) & Ane))){
906 csr32w(ctlr, Txcw, ctlr->txcw);
907 ctrl &= ~(Slu|Fd|Frcdplx);
908 csr32w(ctlr, Ctrl, ctrl);
913 gc82543interrupt(Ureg*, void* arg)
922 while((icr = csr32r(ctlr, Icr) & ctlr->im) != 0){
924 * Link status changed.
926 if(icr & (Lsc|Rxseq))
930 * Process recv buffers.
932 gc82543recv(edev, icr);
935 * Refill transmit ring and free packets.
937 gc82543transmit(edev);
942 gc82543init(Ether* edev)
951 * Allocate private buffer pool to use for receiving packets.
953 ilock(&freelistlock);
954 if (ctlr->freehead == nil){
955 for(i = 0; i < Nblocks; i++){
956 bp = iallocb(SBLOCKSIZE);
958 bp->next = freeShortHead;
959 bp->free = freegc82543short;
963 print("82543gc: no memory\n");
967 ctlr->freehead = &freeShortHead;
969 iunlock(&freelistlock);
972 * Set up the receive addresses.
973 * There are 16 addresses. The first should be the MAC address.
974 * The others are cleared and not marked valid (MS bit of Rah).
976 csr = (edev->ea[3]<<24)|(edev->ea[2]<<16)|(edev->ea[1]<<8)|edev->ea[0];
977 csr32w(ctlr, Ral, csr);
978 csr = 0x80000000|(edev->ea[5]<<8)|edev->ea[4];
979 csr32w(ctlr, Rah, csr);
980 for(i = 1; i < 16; i++){
981 csr32w(ctlr, Ral+i*8, 0);
982 csr32w(ctlr, Rah+i*8, 0);
986 * Clear the Multicast Table Array.
987 * It's a 4096 bit vector accessed as 128 32-bit registers.
989 for(i = 0; i < 128; i++)
990 csr32w(ctlr, Mta+i*4, 0);
999 at93c46io(Ctlr* ctlr, char* op, int data)
1002 int i, loop, eecd, r;
1004 eecd = csr32r(ctlr, Eecd);
1009 for(p = op; *p != '\0'; p++){
1015 case ':': /* start of loop */
1017 if(p != (lp+1) || loop != 7)
1026 case ';': /* end of loop */
1035 case 'C': /* assert clock */
1038 case 'c': /* deassert clock */
1041 case 'D': /* next bit in 'data' byte */
1044 if(data & (1<<loop))
1049 case 'O': /* collect data output */
1050 i = (csr32r(ctlr, Eecd) & Do) != 0;
1056 case 'I': /* assert data input */
1059 case 'i': /* deassert data input */
1062 case 'S': /* enable chip select */
1065 case 's': /* disable chip select */
1069 csr32w(ctlr, Eecd, eecd);
1078 at93c46r(Ctlr* ctlr)
1084 for(addr = 0; addr < 0x40; addr++){
1086 * Read a word at address 'addr' from the Atmel AT93C46
1087 * 3-Wire Serial EEPROM or compatible. The EEPROM access is
1088 * controlled by 4 bits in Eecd. See the AT93C46 datasheet
1089 * for protocol details.
1091 if(at93c46io(ctlr, "S ICc :DCc;", (0x02<<6)|addr) != 0)
1093 data = at93c46io(ctlr, "::COc;", 0);
1094 at93c46io(ctlr, "sic", 0);
1095 ctlr->eeprom[addr] = data;
1103 gc82543detach(Ctlr* ctlr)
1106 * Perform a device reset to get the chip back to the
1107 * power-on state, followed by an EEPROM reset to read
1108 * the defaults for some internal registers.
1110 csr32w(ctlr, Imc, ~0);
1111 csr32w(ctlr, Rctl, 0);
1112 csr32w(ctlr, Tctl, 0);
1116 csr32w(ctlr, Ctrl, Devrst);
1117 while(csr32r(ctlr, Ctrl) & Devrst)
1120 csr32w(ctlr, Ctrlext, Eerst);
1121 while(csr32r(ctlr, Ctrlext) & Eerst)
1124 csr32w(ctlr, Imc, ~0);
1125 while(csr32r(ctlr, Icr))
1130 gc82543checklink(Ctlr* ctlr)
1132 int ctrl, status, rxcw;
1134 ctrl = csr32r(ctlr, Ctrl);
1135 status = csr32r(ctlr, Status);
1136 rxcw = csr32r(ctlr, Rxcw);
1139 if(!(ctrl & (Swdpin1|Slu)) && !(rxcw & Rxconfig)){
1140 csr32w(ctlr, Txcw, ctlr->txcw & ~Ane);
1146 csr32w(ctlr, Ctrl, ctrl);
1149 else if((ctrl & Slu) && (rxcw & Rxconfig)){
1150 csr32w(ctlr, Txcw, ctlr->txcw);
1152 csr32w(ctlr, Ctrl, ctrl);
1157 gc82543shutdown(Ether* ether)
1159 gc82543detach(ether->ctlr);
1163 gc82543reset(Ctlr* ctlr)
1169 * Read the EEPROM, validate the checksum
1170 * then get the device back to a power-on state.
1172 if(at93c46r(ctlr) != 0xBABA)
1175 gc82543detach(ctlr);
1177 te = ctlr->eeprom[Icw2];
1178 if((te & 0x3000) == 0){
1179 ctlr->fcrtl = 0x00002000;
1180 ctlr->fcrth = 0x00004000;
1181 ctlr->txcw = Ane|TxcwFd;
1183 else if((te & 0x3000) == 0x2000){
1186 ctlr->txcw = Ane|TxcwFd|As;
1189 ctlr->fcrtl = 0x00002000;
1190 ctlr->fcrth = 0x00004000;
1191 ctlr->txcw = Ane|TxcwFd|As|Ps;
1194 csr32w(ctlr, Txcw, ctlr->txcw);
1196 csr32w(ctlr, Ctrlext, (te & 0x00f0)<<4);
1198 csr32w(ctlr, Tctl, csr32r(ctlr, Tctl)|(64<<ColdSHIFT));
1200 te = ctlr->eeprom[Icw1];
1201 ctl = ((te & 0x01E0)<<17)|(te & 0x0010)<<3;
1202 csr32w(ctlr, Ctrl, ctl);
1207 * Flow control - values from the datasheet.
1209 csr32w(ctlr, Fcal, 0x00C28001);
1210 csr32w(ctlr, Fcah, 0x00000100);
1211 csr32w(ctlr, Fct, 0x00008808);
1212 csr32w(ctlr, Fcttv, 0x00000100);
1214 csr32w(ctlr, Fcrtl, ctlr->fcrtl);
1215 csr32w(ctlr, Fcrth, ctlr->fcrth);
1218 gc82543checklink(ctlr);
1224 gc82543watchdog(void* arg)
1233 tsleep(&up->sleep, return0, 0, 1000);
1238 gc82543checklink(ctlr);
1239 gc82543replenish(ctlr);
1241 print("%s: exiting\n", up->text);
1242 pexit("disabled", 1);
1254 while(p = pcimatch(p, 0, 0)){
1255 if(p->ccrb != 0x02 || p->ccru != 0)
1258 switch((p->did<<16)|p->vid){
1259 case (0x1000<<16)|0x8086: /* LSI L2A1157 (82542) */
1260 case (0x1004<<16)|0x8086: /* Intel PRO/1000 T */
1261 case (0x1008<<16)|0x8086: /* Intel PRO/1000 XT */
1264 case (0x1001<<16)|0x8086: /* Intel PRO/1000 F */
1268 ctlr = malloc(sizeof(Ctlr));
1270 print("82543gc: can't allocate memory\n");
1273 mem = vmap(p->mem[0].bar & ~0x0F, p->mem[0].size);
1275 print("82543gc: can't map %8.8luX\n", p->mem[0].bar);
1279 cls = pcicfgr8(p, PciCLS);
1285 print("82543gc: p->cls %#ux, setting to 0x10\n", p->cls);
1287 pcicfgw8(p, PciCLS, p->cls);
1289 ctlr->port = p->mem[0].bar & ~0x0F;
1291 ctlr->id = (p->did<<16)|p->vid;
1294 if(gc82543reset(ctlr)){
1299 if(gc82543ctlrhead != nil)
1300 gc82543ctlrtail->next = ctlr;
1302 gc82543ctlrhead = ctlr;
1303 gc82543ctlrtail = ctlr;
1308 gc82543pnp(Ether* edev)
1314 if(gc82543ctlrhead == nil)
1318 * Any adapter matches if no edev->port is supplied,
1319 * otherwise the ports must match.
1321 for(ctlr = gc82543ctlrhead; ctlr != nil; ctlr = ctlr->next){
1324 if(edev->port == 0 || edev->port == ctlr->port){
1333 edev->port = ctlr->port;
1334 edev->irq = ctlr->pcidev->intl;
1335 edev->tbdf = ctlr->pcidev->tbdf;
1339 * Check if the adapter's station address is to be overridden.
1340 * If not, read it from the EEPROM and set in ether->ea prior to
1341 * loading the station address in the hardware.
1343 memset(ea, 0, Eaddrlen);
1344 if(memcmp(ea, edev->ea, Eaddrlen) == 0){
1345 for(i = Ea; i < Eaddrlen/2; i++){
1346 edev->ea[2*i] = ctlr->eeprom[i];
1347 edev->ea[2*i+1] = ctlr->eeprom[i]>>8;
1353 * Linkage to the generic ethernet driver.
1355 edev->attach = gc82543attach;
1356 edev->transmit = gc82543transmit;
1357 edev->interrupt = gc82543interrupt;
1358 edev->ifstat = gc82543ifstat;
1359 edev->shutdown = gc82543shutdown;
1360 edev->ctl = gc82543ctl;
1362 edev->promiscuous = gc82543promiscuous;
1363 edev->multicast = gc82543multicast;
1369 ether82543gclink(void)
1371 addethercard("82543GC", gc82543pnp);