ref: 1f6de2fe3823cc6e749b8254187e81e20589bae8
dir: /os/boot/pc/ether82563.c/
/*
* bootstrap driver for
* Intel 82563, 82571, 82573 Gigabit Ethernet PCI-Express Controllers
*/
#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "etherif.h"
/* compatibility with cpu kernels */
#define iallocb allocb
#ifndef CACHELINESZ
#define CACHELINESZ 32 /* pentium & later */
#endif
/* from pci.c */
enum
{ /* command register pcidev->pcr */
IOen = 1<<0,
MEMen = 1<<1,
MASen = 1<<2,
MemWrInv = 1<<4,
PErrEn = 1<<6,
SErrEn = 1<<8,
};
/*
* these are in the order they appear in the manual, not numeric order.
* It was too hard to find them in the book. Ref 21489, rev 2.6
*/
enum {
/* General */
Ctrl = 0x00000000, /* Device Control */
Status = 0x00000008, /* Device Status */
Eec = 0x00000010, /* EEPROM/Flash Control/Data */
Eerd = 0x00000014, /* EEPROM Read */
Ctrlext = 0x00000018, /* Extended Device Control */
Fla = 0x0000001c, /* Flash Access */
Mdic = 0x00000020, /* MDI Control */
Seresctl = 0x00000024, /* Serdes ana */
Fcal = 0x00000028, /* Flow Control Address Low */
Fcah = 0x0000002C, /* Flow Control Address High */
Fct = 0x00000030, /* Flow Control Type */
Kumctrlsta = 0x00000034, /* Kumeran Controll and Status Register */
Vet = 0x00000038, /* VLAN EtherType */
Fcttv = 0x00000170, /* Flow Control Transmit Timer Value */
Txcw = 0x00000178, /* Transmit Configuration Word */
Rxcw = 0x00000180, /* Receive Configuration Word */
Ledctl = 0x00000E00, /* LED control */
Pba = 0x00001000, /* Packet Buffer Allocation */
/* Interrupt */
Icr = 0x000000C0, /* Interrupt Cause Read */
Ics = 0x000000C8, /* Interrupt Cause Set */
Ims = 0x000000D0, /* Interrupt Mask Set/Read */
Imc = 0x000000D8, /* Interrupt mask Clear */
Iam = 0x000000E0, /* Interrupt acknowledge Auto Mask */
/* Receive */
Rctl = 0x00000100, /* Receive Control */
Ert = 0x00002008, /* Early Receive Threshold (573[EVL] only) */
Fcrtl = 0x00002160, /* Flow Control RX Threshold Low */
Fcrth = 0x00002168, /* Flow Control Rx Threshold High */
Psrctl = 0x00002170, /* Packet Split Receive Control */
Rdbal = 0x00002800, /* Rdesc Base Address Low Queue 0 */
Rdbah = 0x00002804, /* Rdesc Base Address High Queue 0 */
Rdlen = 0x00002808, /* Receive Descriptor Length Queue 0 */
Rdh = 0x00002810, /* Receive Descriptor Head Queue 0 */
Rdt = 0x00002818, /* Receive Descriptor Tail Queue 0 */
Rdtr = 0x00002820, /* Receive Descriptor Timer Ring */
Rxdctl = 0x00002828, /* Receive Descriptor Control */
Radv = 0x0000282C, /* Receive Interrupt Absolute Delay Timer */
Rdbal1 = 0x00002900, /* Rdesc Base Address Low Queue 1 */
Rdbah1 = 0x00002804, /* Rdesc Base Address High Queue 1 */
Rdlen1 = 0x00002908, /* Receive Descriptor Length Queue 1 */
Rdh1 = 0x00002910, /* Receive Descriptor Head Queue 1 */
Rdt1 = 0x00002918, /* Receive Descriptor Tail Queue 1 */
Rxdctl1 = 0x00002928, /* Receive Descriptor Control Queue 1 */
Rsrpd = 0x00002c00, /* Receive Small Packet Detect */
Raid = 0x00002c08, /* Receive ACK interrupt delay */
Cpuvec = 0x00002c10, /* CPU Vector */
Rxcsum = 0x00005000, /* Receive Checksum Control */
Rfctl = 0x00005008, /* Receive Filter Control */
Mta = 0x00005200, /* Multicast Table Array */
Ral = 0x00005400, /* Receive Address Low */
Rah = 0x00005404, /* Receive Address High */
Vfta = 0x00005600, /* VLAN Filter Table Array */
Mrqc = 0x00005818, /* Multiple Receive Queues Command */
Rssim = 0x00005864, /* RSS Interrupt Mask */
Rssir = 0x00005868, /* RSS Interrupt Request */
Reta = 0x00005c00, /* Redirection Table */
Rssrk = 0x00005c80, /* RSS Random Key */
/* Transmit */
Tctl = 0x00000400, /* Transmit Control */
Tipg = 0x00000410, /* Transmit IPG */
Tdbal = 0x00003800, /* Tdesc Base Address Low */
Tdbah = 0x00003804, /* Tdesc Base Address High */
Tdlen = 0x00003808, /* Transmit Descriptor Length */
Tdh = 0x00003810, /* Transmit Descriptor Head */
Tdt = 0x00003818, /* Transmit Descriptor Tail */
Tidv = 0x00003820, /* Transmit Interrupt Delay Value */
Txdctl = 0x00003828, /* Transmit Descriptor Control */
Tadv = 0x0000382C, /* Transmit Interrupt Absolute Delay Timer */
Tarc0 = 0x00003840, /* Transmit Arbitration Counter Queue 0 */
Tdbal1 = 0x00003900, /* Transmit Descriptor Base Low Queue 1 */
Tdbah1 = 0x00003904, /* Transmit Descriptor Base High Queue 1 */
Tdlen1 = 0x00003908, /* Transmit Descriptor Length Queue 1 */
Tdh1 = 0x00003910, /* Transmit Descriptor Head Queue 1 */
Tdt1 = 0x00003918, /* Transmit Descriptor Tail Queue 1 */
Txdctl1 = 0x00003928, /* Transmit Descriptor Control 1 */
Tarc1 = 0x00003940, /* Transmit Arbitration Counter Queue 1 */
/* Statistics */
Statistics = 0x00004000, /* Start of Statistics Area */
Gorcl = 0x88/4, /* Good Octets Received Count */
Gotcl = 0x90/4, /* Good Octets Transmitted Count */
Torl = 0xC0/4, /* Total Octets Received */
Totl = 0xC8/4, /* Total Octets Transmitted */
Nstatistics = 64,
};
enum { /* Ctrl */
GIOmd = 1<<2, /* BIO master disable */
Lrst = 1<<3, /* link reset */
Slu = 1<<6, /* Set Link Up */
SspeedMASK = 3<<8, /* Speed Selection */
SspeedSHIFT = 8,
Sspeed10 = 0x00000000, /* 10Mb/s */
Sspeed100 = 0x00000100, /* 100Mb/s */
Sspeed1000 = 0x00000200, /* 1000Mb/s */
Frcspd = 1<<11, /* Force Speed */
Frcdplx = 1<<12, /* Force Duplex */
SwdpinsloMASK = 0x003C0000, /* Software Defined Pins - lo nibble */
SwdpinsloSHIFT = 18,
SwdpioloMASK = 0x03C00000, /* Software Defined Pins - I or O */
SwdpioloSHIFT = 22,
Devrst = 1<<26, /* Device Reset */
Rfce = 1<<27, /* Receive Flow Control Enable */
Tfce = 1<<28, /* Transmit Flow Control Enable */
Vme = 1<<30, /* VLAN Mode Enable */
Phy_rst = 1<<31, /* Phy Reset */
};
enum { /* Status */
Lu = 1<<1, /* Link Up */
Lanid = 3<<2, /* mask for Lan ID. */
Txoff = 1<<4, /* Transmission Paused */
Tbimode = 1<<5, /* TBI Mode Indication */
SpeedMASK = 0x000000C0,
Speed10 = 0x00000000, /* 10Mb/s */
Speed100 = 0x00000040, /* 100Mb/s */
Speed1000 = 0x00000080, /* 1000Mb/s */
Phyra = 1<<10, /* PHY Reset Asserted */
GIOme = 1<<19, /* GIO Master Enable Status */
};
enum { /* Ctrl and Status */
Fd = 0x00000001, /* Full-Duplex */
AsdvMASK = 0x00000300,
Asdv10 = 0x00000000, /* 10Mb/s */
Asdv100 = 0x00000100, /* 100Mb/s */
Asdv1000 = 0x00000200, /* 1000Mb/s */
};
enum { /* Eec */
Sk = 1<<0, /* Clock input to the EEPROM */
Cs = 1<<1, /* Chip Select */
Di = 1<<2, /* Data Input to the EEPROM */
Do = 1<<3, /* Data Output from the EEPROM */
Areq = 1<<6, /* EEPROM Access Request */
Agnt = 1<<7, /* EEPROM Access Grant */
};
enum { /* Eerd */
ee_start = 1<<0, /* Start Read */
ee_done = 1<<1, /* Read done */
ee_addr = 0xfff8<<2, /* Read address [15:2] */
ee_data = 0xffff<<16, /* Read Data; Data returned from eeprom/nvm */
};
enum { /* Ctrlext */
Asdchk = 1<<12, /* ASD Check */
Eerst = 1<<13, /* EEPROM Reset */
Spdbyps = 1<<15, /* Speed Select Bypass */
};
enum { /* EEPROM content offsets */
Ea = 0x00, /* Ethernet Address */
Cf = 0x03, /* Compatibility Field */
Icw1 = 0x0A, /* Initialization Control Word 1 */
Sid = 0x0B, /* Subsystem ID */
Svid = 0x0C, /* Subsystem Vendor ID */
Did = 0x0D, /* Device ID */
Vid = 0x0E, /* Vendor ID */
Icw2 = 0x0F, /* Initialization Control Word 2 */
};
enum { /* Mdic */
MDIdMASK = 0x0000FFFF, /* Data */
MDIdSHIFT = 0,
MDIrMASK = 0x001F0000, /* PHY Register Address */
MDIrSHIFT = 16,
MDIpMASK = 0x03E00000, /* PHY Address */
MDIpSHIFT = 21,
MDIwop = 0x04000000, /* Write Operation */
MDIrop = 0x08000000, /* Read Operation */
MDIready = 0x10000000, /* End of Transaction */
MDIie = 0x20000000, /* Interrupt Enable */
MDIe = 0x40000000, /* Error */
};
enum { /* Icr, Ics, Ims, Imc */
Txdw = 0x00000001, /* Transmit Descriptor Written Back */
Txqe = 0x00000002, /* Transmit Queue Empty */
Lsc = 0x00000004, /* Link Status Change */
Rxseq = 0x00000008, /* Receive Sequence Error */
Rxdmt0 = 0x00000010, /* Rdesc Minimum Threshold Reached */
Rxo = 0x00000040, /* Receiver Overrun */
Rxt0 = 0x00000080, /* Receiver Timer Interrupt */
Mdac = 0x00000200, /* MDIO Access Completed */
Rxcfg = 0x00000400, /* Receiving /C/ ordered sets */
Gpi0 = 0x00000800, /* General Purpose Interrupts */
Gpi1 = 0x00001000,
Gpi2 = 0x00002000,
Gpi3 = 0x00004000,
Ack = 0x00020000, /* receive ACK frame */
};
enum { /* Txcw */
TxcwFd = 0x00000020, /* Full Duplex */
TxcwHd = 0x00000040, /* Half Duplex */
TxcwPauseMASK = 0x00000180, /* Pause */
TxcwPauseSHIFT = 7,
TxcwPs = 1<<TxcwPauseSHIFT, /* Pause Supported */
TxcwAs = 2<<TxcwPauseSHIFT, /* Asymmetric FC desired */
TxcwRfiMASK = 0x00003000, /* Remote Fault Indication */
TxcwRfiSHIFT = 12,
TxcwNpr = 0x00008000, /* Next Page Request */
TxcwConfig = 0x40000000, /* Transmit COnfig Control */
TxcwAne = 0x80000000, /* Auto-Negotiation Enable */
};
enum { /* Rctl */
Rrst = 0x00000001, /* Receiver Software Reset */
Ren = 0x00000002, /* Receiver Enable */
Sbp = 0x00000004, /* Store Bad Packets */
Upe = 0x00000008, /* Unicast Promiscuous Enable */
Mpe = 0x00000010, /* Multicast Promiscuous Enable */
Lpe = 0x00000020, /* Long Packet Reception Enable */
LbmMASK = 0x000000C0, /* Loopback Mode */
LbmOFF = 0x00000000, /* No Loopback */
LbmTBI = 0x00000040, /* TBI Loopback */
LbmMII = 0x00000080, /* GMII/MII Loopback */
LbmXCVR = 0x000000C0, /* Transceiver Loopback */
RdtmsMASK = 0x00000300, /* Rdesc Minimum Threshold Size */
RdtmsHALF = 0x00000000, /* Threshold is 1/2 Rdlen */
RdtmsQUARTER = 0x00000100, /* Threshold is 1/4 Rdlen */
RdtmsEIGHTH = 0x00000200, /* Threshold is 1/8 Rdlen */
MoMASK = 0x00003000, /* Multicast Offset */
Bam = 0x00008000, /* Broadcast Accept Mode */
BsizeMASK = 0x00030000, /* Receive Buffer Size */
Bsize2048 = 0x00000000,
Bsize1024 = 0x00010000,
Bsize512 = 0x00020000,
Bsize256 = 0x00030000,
Vfe = 0x00040000, /* VLAN Filter Enable */
Cfien = 0x00080000, /* Canonical Form Indicator Enable */
Cfi = 0x00100000, /* Canonical Form Indicator value */
Dpf = 0x00400000, /* Discard Pause Frames */
Pmcf = 0x00800000, /* Pass MAC Control Frames */
Bsex = 0x02000000, /* Buffer Size Extension */
Secrc = 0x04000000, /* Strip CRC from incoming packet */
};
enum { /* Tctl */
Trst = 0x00000001, /* Transmitter Software Reset */
Ten = 0x00000002, /* Transmit Enable */
Psp = 0x00000008, /* Pad Short Packets */
Mulr = 0x10000000, /* Allow multiple concurrent requests */
CtMASK = 0x00000FF0, /* Collision Threshold */
CtSHIFT = 4,
ColdMASK = 0x003FF000, /* Collision Distance */
ColdSHIFT = 12,
Swxoff = 0x00400000, /* Sofware XOFF Transmission */
Pbe = 0x00800000, /* Packet Burst Enable */
Rtlc = 0x01000000, /* Re-transmit on Late Collision */
Nrtu = 0x02000000, /* No Re-transmit on Underrrun */
};
enum { /* [RT]xdctl */
PthreshMASK = 0x0000003F, /* Prefetch Threshold */
PthreshSHIFT = 0,
HthreshMASK = 0x00003F00, /* Host Threshold */
HthreshSHIFT = 8,
WthreshMASK = 0x003F0000, /* Writebacj Threshold */
WthreshSHIFT = 16,
Gran = 0x01000000, /* Granularity */
};
enum { /* Rxcsum */
PcssMASK = 0x000000FF, /* Packet Checksum Start */
PcssSHIFT = 0,
Ipofl = 0x00000100, /* IP Checksum Off-load Enable */
Tuofl = 0x00000200, /* TCP/UDP Checksum Off-load Enable */
};
typedef struct Rdesc { /* Receive Descriptor */
uint addr[2];
ushort length;
ushort checksum;
uchar status;
uchar errors;
ushort special;
} Rdesc;
enum { /* Rdesc status */
Rdd = 0x01, /* Descriptor Done */
Reop = 0x02, /* End of Packet */
Ixsm = 0x04, /* Ignore Checksum Indication */
Vp = 0x08, /* Packet is 802.1Q (matched VET) */
Tcpcs = 0x20, /* TCP Checksum Calculated on Packet */
Ipcs = 0x40, /* IP Checksum Calculated on Packet */
Pif = 0x80, /* Passed in-exact filter */
};
enum { /* Rdesc errors */
Ce = 0x01, /* CRC Error or Alignment Error */
Se = 0x02, /* Symbol Error */
Seq = 0x04, /* Sequence Error */
Cxe = 0x10, /* Carrier Extension Error */
Tcpe = 0x20, /* TCP/UDP Checksum Error */
Ipe = 0x40, /* IP Checksum Error */
Rxe = 0x80, /* RX Data Error */
};
typedef struct Tdesc { /* Legacy+Normal Transmit Descriptor */
uint addr[2];
uint control; /* varies with descriptor type */
uint status; /* varies with descriptor type */
} Tdesc;
enum { /* Tdesc control */
LenMASK = 0x000FFFFF, /* Data/Packet Length Field */
LenSHIFT = 0,
DtypeCD = 0x00000000, /* Data Type 'Context Descriptor' */
DtypeDD = 0x00100000, /* Data Type 'Data Descriptor' */
PtypeTCP = 0x01000000, /* TCP/UDP Packet Type (CD) */
Teop = 0x01000000, /* End of Packet (DD) */
PtypeIP = 0x02000000, /* IP Packet Type (CD) */
Ifcs = 0x02000000, /* Insert FCS (DD) */
Tse = 0x04000000, /* TCP Segmentation Enable */
Rs = 0x08000000, /* Report Status */
Rps = 0x10000000, /* Report Status Sent */
Dext = 0x20000000, /* Descriptor Extension */
Vle = 0x40000000, /* VLAN Packet Enable */
Ide = 0x80000000, /* Interrupt Delay Enable */
};
enum { /* Tdesc status */
Tdd = 0x00000001, /* Descriptor Done */
Ec = 0x00000002, /* Excess Collisions */
Lc = 0x00000004, /* Late Collision */
Tu = 0x00000008, /* Transmit Underrun */
CssMASK = 0x0000FF00, /* Checksum Start Field */
CssSHIFT = 8,
};
enum {
Nrdesc = 128, /* multiple of 8 */
Ntdesc = 128, /* multiple of 8 */
};
enum {
i82563,
i82571,
i82573,
};
static char *tname[] = {
"i82563",
"i82571",
"i82573",
};
#define Type tname[ctlr->type]
typedef struct Ctlr Ctlr;
struct Ctlr {
int port;
Pcidev *pcidev;
Ctlr *next;
int active;
int cls;
ushort eeprom[0x40];
uchar ra[Eaddrlen]; /* receive address */
int type;
int* nic;
Lock imlock;
int im; /* interrupt mask */
Lock slock;
uint statistics[Nstatistics];
Rdesc *rdba; /* receive descriptor base address */
Block **rb; /* receive buffers */
int rdh; /* receive descriptor head */
int rdt; /* receive descriptor tail */
Tdesc *tdba; /* transmit descriptor base address */
Lock tdlock;
Block **tb; /* transmit buffers */
int tdh; /* transmit descriptor head */
int tdt; /* transmit descriptor tail */
int txcw;
int fcrtl;
int fcrth;
/* bootstrap goo */
Block *bqhead; /* transmission queue */
Block *bqtail;
};
static Ctlr *ctlrhead;
static Ctlr *ctlrtail;
#define csr32r(c, r) (*((c)->nic+((r)/4)))
#define csr32w(c, r, v) (*((c)->nic+((r)/4)) = (v))
static void
i82563im(Ctlr* ctlr, int im)
{
ilock(&ctlr->imlock);
ctlr->im |= im;
csr32w(ctlr, Ims, ctlr->im);
iunlock(&ctlr->imlock);
}
static void
i82563attach(Ether* edev)
{
int ctl;
Ctlr *ctlr;
ctlr = edev->ctlr;
i82563im(ctlr, 0);
ctl = csr32r(ctlr, Rctl)|Ren;
csr32w(ctlr, Rctl, ctl);
ctl = csr32r(ctlr, Tctl)|Ten;
csr32w(ctlr, Tctl, ctl);
}
static void
txstart(Ether *edev)
{
int tdh, tdt;
Ctlr *ctlr = edev->ctlr;
Block *bp;
Tdesc *tdesc;
/*
* Try to fill the ring back up, moving buffers from the transmit q.
*/
tdh = PREV(ctlr->tdh, Ntdesc);
for(tdt = ctlr->tdt; tdt != tdh; tdt = NEXT(tdt, Ntdesc)){
/* pull off the head of the transmission queue */
if((bp = ctlr->bqhead) == nil) /* was qget(edev->oq) */
break;
ctlr->bqhead = bp->next;
if (ctlr->bqtail == bp)
ctlr->bqtail = nil;
/* set up a descriptor for it */
tdesc = &ctlr->tdba[tdt];
tdesc->addr[0] = PCIWADDR(bp->rp);
tdesc->addr[1] = 0;
tdesc->control = /* Ide | */ Rs | Ifcs | Teop | BLEN(bp);
ctlr->tb[tdt] = bp;
}
ctlr->tdt = tdt;
csr32w(ctlr, Tdt, tdt);
i82563im(ctlr, Txdw);
}
static Block *
fromringbuf(Ether *ether)
{
RingBuf *tb = ðer->tb[ether->ti];
Block *bp = allocb(tb->len);
memmove(bp->wp, tb->pkt, tb->len);
memmove(bp->wp+Eaddrlen, ether->ea, Eaddrlen);
bp->wp += tb->len;
return bp;
}
static void
i82563transmit(Ether* edev)
{
Block *bp;
Ctlr *ctlr;
Tdesc *tdesc;
RingBuf *tb;
int tdh;
ctlr = edev->ctlr;
ilock(&ctlr->tdlock);
/*
* Free any completed packets
* - try to get the soft tdh to catch the tdt;
* - if the packet had an underrun bump the threshold
* - the Tu bit doesn't seem to ever be set, perhaps
* because Rs mode is used?
*/
tdh = ctlr->tdh;
for(;;){
tdesc = &ctlr->tdba[tdh];
if(!(tdesc->status & Tdd))
break;
if(ctlr->tb[tdh] != nil){
freeb(ctlr->tb[tdh]);
ctlr->tb[tdh] = nil;
}
tdesc->status = 0;
tdh = NEXT(tdh, Ntdesc);
}
ctlr->tdh = tdh;
/* copy packets from the software RingBuf to the transmission q */
while((tb = &edev->tb[edev->ti])->owner == Interface){
bp = fromringbuf(edev);
// print("#l%d: tx %d %E %E\n", edev->ctlrno, edev->ti, bp->rp,
// bp->rp+6);
if(ctlr->bqhead)
ctlr->bqtail->next = bp;
else
ctlr->bqhead = bp;
ctlr->bqtail = bp;
txstart(edev); /* kick transmitter */
tb->owner = Host; /* give descriptor back */
edev->ti = NEXT(edev->ti, edev->ntb);
}
iunlock(&ctlr->tdlock);
}
static void
i82563replenish(Ctlr* ctlr)
{
int rdt;
Block *bp;
Rdesc *rdesc;
rdt = ctlr->rdt;
while(NEXT(rdt, Nrdesc) != ctlr->rdh){
rdesc = &ctlr->rdba[rdt];
if(ctlr->rb[rdt] != nil){
/* nothing to do */
}
else if((bp = iallocb(2048)) != nil){
ctlr->rb[rdt] = bp;
rdesc->addr[0] = PCIWADDR(bp->rp);
rdesc->addr[1] = 0;
}
else
break;
rdesc->status = 0;
rdt = NEXT(rdt, Nrdesc);
}
ctlr->rdt = rdt;
csr32w(ctlr, Rdt, rdt);
}
static void
toringbuf(Ether *ether, Block *bp)
{
RingBuf *rb = ðer->rb[ether->ri];
if (rb->owner == Interface) {
rb->len = BLEN(bp);
memmove(rb->pkt, bp->rp, rb->len);
rb->owner = Host;
ether->ri = NEXT(ether->ri, ether->nrb);
} else if (debug)
print("#l%d: toringbuf: dropping packets @ ri %d\n",
ether->ctlrno, ether->ri);
}
static void
i82563interrupt(Ureg*, void* arg)
{
int icr, im, rdh, txdw = 0;
Block *bp;
Ctlr *ctlr;
Ether *edev;
Rdesc *rdesc;
edev = arg;
ctlr = edev->ctlr;
ilock(&ctlr->imlock);
csr32w(ctlr, Imc, ~0);
im = ctlr->im;
for(icr = csr32r(ctlr, Icr); icr & ctlr->im; icr = csr32r(ctlr, Icr)){
if(icr & (Rxseq|Lsc)){
/* should be more here */
}
rdh = ctlr->rdh;
for (;;) {
rdesc = &ctlr->rdba[rdh];
if(!(rdesc->status & Rdd))
break;
if ((rdesc->status & Reop) && rdesc->errors == 0) {
bp = ctlr->rb[rdh];
if(0 && memcmp(bp->rp, broadcast, 6) != 0)
print("#l%d: rx %d %E %E %d\n",
edev->ctlrno, rdh, bp->rp,
bp->rp+6, rdesc->length);
ctlr->rb[rdh] = nil;
bp->wp += rdesc->length;
toringbuf(edev, bp);
freeb(bp);
} else if (rdesc->status & Reop && rdesc->errors)
print("%s: input packet error 0x%ux\n",
Type, rdesc->errors);
rdesc->status = 0;
rdh = NEXT(rdh, Nrdesc);
}
ctlr->rdh = rdh;
if(icr & Rxdmt0)
i82563replenish(ctlr);
if(icr & Txdw){
im &= ~Txdw;
txdw++;
}
}
ctlr->im = im;
csr32w(ctlr, Ims, im);
iunlock(&ctlr->imlock);
if(txdw)
i82563transmit(edev);
}
static void
i82563init(Ether* edev)
{
int csr, i, r;
Ctlr *ctlr;
ctlr = edev->ctlr;
csr = edev->ea[3]<<24 | edev->ea[2]<<16 | edev->ea[1]<<8 | edev->ea[0];
csr32w(ctlr, Ral, csr);
csr = 0x80000000 | edev->ea[5]<<8 | edev->ea[4];
csr32w(ctlr, Rah, csr);
for (i = 1; i < 16; i++) {
csr32w(ctlr, Ral+i*8, 0);
csr32w(ctlr, Rah+i*8, 0);
}
for(i = 0; i < 128; i++)
csr32w(ctlr, Mta+i*4, 0);
csr32w(ctlr, Rctl, 0);
ctlr->rdba = xspanalloc(Nrdesc*sizeof(Rdesc), 256, 0);
csr32w(ctlr, Rdbal, PCIWADDR(ctlr->rdba));
csr32w(ctlr, Rdbah, 0);
csr32w(ctlr, Rdlen, Nrdesc*sizeof(Rdesc));
ctlr->rdh = 0;
csr32w(ctlr, Rdh, ctlr->rdh);
ctlr->rdt = 0;
csr32w(ctlr, Rdt, ctlr->rdt);
ctlr->rb = malloc(sizeof(Block*)*Nrdesc);
i82563replenish(ctlr);
csr32w(ctlr, Rdtr, 0);
csr32w(ctlr, Rctl, Dpf | Bsize2048 | Bam | RdtmsHALF);
i82563im(ctlr, Rxt0 | Rxo | Rxdmt0 | Rxseq | Ack);
csr32w(ctlr, Tctl, 0x0F<<CtSHIFT | Psp | 0x3f<<ColdSHIFT | Mulr);
csr32w(ctlr, Tipg, 6<<20 | 8<<10 | 8);
csr32w(ctlr, Tidv, 1);
ctlr->tdba = xspanalloc(Ntdesc*sizeof(Tdesc), 256, 0);
memset(ctlr->tdba, 0, Ntdesc*sizeof(Tdesc));
csr32w(ctlr, Tdbal, PCIWADDR(ctlr->tdba));
csr32w(ctlr, Tdbah, 0);
csr32w(ctlr, Tdlen, Ntdesc*sizeof(Tdesc));
ctlr->tdh = 0;
csr32w(ctlr, Tdh, ctlr->tdh);
ctlr->tdt = 0;
csr32w(ctlr, Tdt, ctlr->tdt);
ctlr->tb = malloc(sizeof(Block*)*Ntdesc);
// r = 4<<WthreshSHIFT | 4<<HthreshSHIFT | 8<<PthreshSHIFT;
// csr32w(ctlr, Txdctl, r);
csr32w(ctlr, Rxcsum, Tuofl | Ipofl | ETHERHDRSIZE<<PcssSHIFT);
r = csr32r(ctlr, Tctl);
r |= Ten;
csr32w(ctlr, Tctl, r);
}
static ushort
eeread(Ctlr* ctlr, int adr)
{
csr32w(ctlr, Eerd, ee_start | adr << 2);
while ((csr32r(ctlr, Eerd) & ee_done) == 0)
;
return csr32r(ctlr, Eerd) >> 16;
}
static int
eeload(Ctlr* ctlr)
{
ushort sum;
int data, adr;
sum = 0;
for (adr = 0; adr < 0x40; adr++) {
data = eeread(ctlr, adr);
ctlr->eeprom[adr] = data;
sum += data;
}
return sum;
}
static void
detach(Ctlr *ctlr)
{
int r;
csr32w(ctlr, Imc, ~0);
csr32w(ctlr, Rctl, 0);
csr32w(ctlr, Tctl, 0);
delay(10);
r = csr32r(ctlr, Ctrl);
csr32w(ctlr, Ctrl, Devrst | r);
/* apparently needed on multi-GHz processors to avoid infinite loops */
delay(1);
while(csr32r(ctlr, Ctrl) & Devrst)
;
if(1 || ctlr->type != i82563){
r = csr32r(ctlr, Ctrl);
csr32w(ctlr, Ctrl, Slu | r);
}
csr32w(ctlr, Ctrlext, Eerst | csr32r(ctlr, Ctrlext));
delay(1);
while(csr32r(ctlr, Ctrlext) & Eerst)
;
csr32w(ctlr, Imc, ~0);
delay(1);
while(csr32r(ctlr, Icr))
;
}
static void
i82563detach(Ether *edev)
{
detach(edev->ctlr);
}
static void
i82563shutdown(Ether* ether)
{
i82563detach(ether);
}
static int
i82563reset(Ctlr* ctlr)
{
int i, r;
detach(ctlr);
r = eeload(ctlr);
if (r != 0 && r != 0xBABA){
print("%s: bad EEPROM checksum - 0x%4.4ux\n", Type, r);
return -1;
}
for(i = Ea; i < Eaddrlen/2; i++){
ctlr->ra[2*i] = ctlr->eeprom[i];
ctlr->ra[2*i+1] = ctlr->eeprom[i]>>8;
}
r = (csr32r(ctlr, Status) & Lanid) >> 2;
ctlr->ra[5] += r; /* ea ctlr[1] = ea ctlr[0]+1 */
r = ctlr->ra[3]<<24 | ctlr->ra[2]<<16 | ctlr->ra[1]<<8 | ctlr->ra[0];
csr32w(ctlr, Ral, r);
r = 0x80000000 | ctlr->ra[5]<<8 | ctlr->ra[4];
csr32w(ctlr, Rah, r);
for(i = 1; i < 16; i++){
csr32w(ctlr, Ral+i*8, 0);
csr32w(ctlr, Rah+i*8, 0);
}
for(i = 0; i < 128; i++)
csr32w(ctlr, Mta+i*4, 0);
csr32w(ctlr, Fcal, 0x00C28001);
csr32w(ctlr, Fcah, 0x00000100);
csr32w(ctlr, Fct, 0x00008808);
csr32w(ctlr, Fcttv, 0x00000100);
csr32w(ctlr, Fcrtl, ctlr->fcrtl);
csr32w(ctlr, Fcrth, ctlr->fcrth);
ilock(&ctlr->imlock);
csr32w(ctlr, Imc, ~0);
ctlr->im = 0; /* was = Lsc, which hangs some controllers */
csr32w(ctlr, Ims, ctlr->im);
iunlock(&ctlr->imlock);
return 0;
}
static void
i82563pci(void)
{
int port, type, cls;
Pcidev *p;
Ctlr *ctlr;
static int first = 1;
if (first)
first = 0;
else
return;
p = nil;
while(p = pcimatch(p, 0x8086, 0)){
switch(p->did){
case 0x1096:
case 0x10ba:
type = i82563;
break;
case 0x108b: /* e */
case 0x108c: /* e (iamt) */
case 0x109a: /* l */
type = i82573;
break;
default:
continue;
}
port = upamalloc(p->mem[0].bar & ~0x0F, p->mem[0].size, 0);
if(port == 0){
print("%s: can't map %d @ 0x%8.8lux\n", tname[type],
p->mem[0].size, p->mem[0].bar);
continue;
}
if(p->pcr & MemWrInv){
cls = pcicfgr8(p, PciCLS) * 4;
if(cls != CACHELINESZ)
pcicfgw8(p, PciCLS, CACHELINESZ/4);
}
cls = pcicfgr8(p, PciCLS);
switch(cls){
default:
print("%s: unexpected CLS - %d bytes\n",
tname[type], cls*sizeof(long));
break;
case 0x00:
case 0xFF:
/* alphapc 164lx returns 0 */
print("%s: unusable PciCLS: %d, using %d longs\n",
tname[type], cls, CACHELINESZ/sizeof(long));
cls = CACHELINESZ/sizeof(long);
pcicfgw8(p, PciCLS, cls);
break;
case 0x08:
case 0x10:
break;
}
ctlr = malloc(sizeof(Ctlr));
ctlr->port = port;
ctlr->pcidev = p;
ctlr->cls = cls*4;
ctlr->type = type;
ctlr->nic = KADDR(ctlr->port);
if(i82563reset(ctlr)){
free(ctlr);
continue;
}
pcisetbme(p);
if(ctlrhead != nil)
ctlrtail->next = ctlr;
else
ctlrhead = ctlr;
ctlrtail = ctlr;
}
}
static uchar nilea[Eaddrlen];
int
i82563pnp(Ether* edev)
{
Ctlr *ctlr;
if(ctlrhead == nil)
i82563pci();
/*
* Any adapter matches if no edev->port is supplied,
* otherwise the ports must match.
*/
for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){
if(ctlr->active)
continue;
if(edev->port == 0 || edev->port == ctlr->port){
ctlr->active = 1;
break;
}
}
if(ctlr == nil)
return -1;
edev->ctlr = ctlr;
edev->port = ctlr->port;
edev->irq = ctlr->pcidev->intl;
edev->tbdf = ctlr->pcidev->tbdf;
// edev->mbps = 1000;
if(memcmp(edev->ea, nilea, Eaddrlen) == 0)
memmove(edev->ea, ctlr->ra, Eaddrlen);
i82563init(edev);
/*
* Linkage to the generic ethernet driver.
*/
edev->attach = i82563attach;
edev->transmit = i82563transmit;
edev->interrupt = i82563interrupt;
edev->detach = i82563detach;
/*
* with the current structure, there is no right place for this.
* ideally, we recognize the interface, note it's down and move on.
* currently either we can skip the interface or note it is down,
* but not both.
*/
if((csr32r(ctlr, Status)&Lu) == 0){
print("ether#%d: 82563 (%s): link down\n", edev->ctlrno, Type);
return -1;
}
return 0;
}