ref: 05d9123a707dec0eaa0ab079b94e69cdb750c6db
dir: /os/boot/pc/etherdp83820.c/
/*
* boot driver for
* National Semiconductor DP83820
* 10/100/1000 Mb/s Ethernet Network Interface Controller
* (Gig-NIC).
* Driver assumes little-endian and 32-bit host throughout.
*/
#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "etherif.h"
#include "ethermii.h"
#define iprint print
#define waserror() (0)
#define poperror()
enum { /* Registers */
Cr = 0x00, /* Command */
Cfg = 0x04, /* Configuration and Media Status */
Mear = 0x08, /* MII/EEPROM Access */
Ptscr = 0x0C, /* PCI Test Control */
Isr = 0x10, /* Interrupt Status */
Imr = 0x14, /* Interrupt Mask */
Ier = 0x18, /* Interrupt Enable */
Ihr = 0x1C, /* Interrupt Holdoff */
Txdp = 0x20, /* Transmit Descriptor Pointer */
Txdphi = 0x24, /* Transmit Descriptor Pointer Hi */
Txcfg = 0x28, /* Transmit Configuration */
Gpior = 0x2C, /* General Purpose I/O Control */
Rxdp = 0x30, /* Receive Descriptor Pointer */
Rxdphi = 0x34, /* Receive Descriptor Pointer Hi */
Rxcfg = 0x38, /* Receive Configuration */
Pqcr = 0x3C, /* Priority Queueing Control */
Wcsr = 0x40, /* Wake on LAN Control/Status */
Pcr = 0x44, /* Pause Control/Status */
Rfcr = 0x48, /* Receive Filter/Match Control */
Rfdr = 0x4C, /* Receive Filter/Match Data */
Brar = 0x50, /* Boot ROM Address */
Brdr = 0x54, /* Boot ROM Data */
Srr = 0x58, /* Silicon Revision */
Mibc = 0x5C, /* MIB Control */
Mibd = 0x60, /* MIB Data */
Txdp1 = 0xA0, /* Txdp Priority 1 */
Txdp2 = 0xA4, /* Txdp Priority 2 */
Txdp3 = 0xA8, /* Txdp Priority 3 */
Rxdp1 = 0xB0, /* Rxdp Priority 1 */
Rxdp2 = 0xB4, /* Rxdp Priority 2 */
Rxdp3 = 0xB8, /* Rxdp Priority 3 */
Vrcr = 0xBC, /* VLAN/IP Receive Control */
Vtcr = 0xC0, /* VLAN/IP Transmit Control */
Vdr = 0xC4, /* VLAN Data */
Ccsr = 0xCC, /* Clockrun Control/Status */
Tbicr = 0xE0, /* TBI Control */
Tbisr = 0xE4, /* TBI Status */
Tanar = 0xE8, /* TBI ANAR */
Tanlpar = 0xEC, /* TBI ANLPAR */
Taner = 0xF0, /* TBI ANER */
Tesr = 0xF4, /* TBI ESR */
};
enum { /* Cr */
Txe = 0x00000001, /* Transmit Enable */
Txd = 0x00000002, /* Transmit Disable */
Rxe = 0x00000004, /* Receiver Enable */
Rxd = 0x00000008, /* Receiver Disable */
Txr = 0x00000010, /* Transmitter Reset */
Rxr = 0x00000020, /* Receiver Reset */
Swien = 0x00000080, /* Software Interrupt Enable */
Rst = 0x00000100, /* Reset */
TxpriSHFT = 9, /* Tx Priority Queue Select */
TxpriMASK = 0x00001E00,
RxpriSHFT = 13, /* Rx Priority Queue Select */
RxpriMASK = 0x0001E000,
};
enum { /* Configuration and Media Status */
Bem = 0x00000001, /* Big Endian Mode */
Ext125 = 0x00000002, /* External 125MHz reference Select */
Bromdis = 0x00000004, /* Disable Boot ROM interface */
Pesel = 0x00000008, /* Parity Error Detection Action */
Exd = 0x00000010, /* Excessive Deferral Abort */
Pow = 0x00000020, /* Program Out of Window Timer */
Sb = 0x00000040, /* Single Back-off */
Reqalg = 0x00000080, /* PCI Bus Request Algorithm */
Extstsen = 0x00000100, /* Extended Status Enable */
Phydis = 0x00000200, /* Disable PHY */
Phyrst = 0x00000400, /* Reset PHY */
M64addren = 0x00000800, /* Master 64-bit Addressing Enable */
Data64en = 0x00001000, /* 64-bit Data Enable */
Pci64det = 0x00002000, /* PCI 64-bit Bus Detected */
T64addren = 0x00004000, /* Target 64-bit Addressing Enable */
Mwidis = 0x00008000, /* MWI Disable */
Mrmdis = 0x00010000, /* MRM Disable */
Tmrtest = 0x00020000, /* Timer Test Mode */
Spdstsien = 0x00040000, /* PHY Spdsts Interrupt Enable */
Lnkstsien = 0x00080000, /* PHY Lnksts Interrupt Enable */
Dupstsien = 0x00100000, /* PHY Dupsts Interrupt Enable */
Mode1000 = 0x00400000, /* 1000Mb/s Mode Control */
Tbien = 0x01000000, /* Ten-Bit Interface Enable */
Dupsts = 0x10000000, /* Full Duplex Status */
Spdsts100 = 0x20000000, /* SPEED100 Input Pin Status */
Spdsts1000 = 0x40000000, /* SPEED1000 Input Pin Status */
Lnksts = 0x80000000, /* Link Status */
};
enum { /* MII/EEPROM Access */
Eedi = 0x00000001, /* EEPROM Data In */
Eedo = 0x00000002, /* EEPROM Data Out */
Eeclk = 0x00000004, /* EEPROM Serial Clock */
Eesel = 0x00000008, /* EEPROM Chip Select */
Mdio = 0x00000010, /* MII Management Data */
Mddir = 0x00000020, /* MII Management Direction */
Mdc = 0x00000040, /* MII Management Clock */
};
enum { /* Interrupts */
Rxok = 0x00000001, /* Rx OK */
Rxdesc = 0x00000002, /* Rx Descriptor */
Rxerr = 0x00000004, /* Rx Packet Error */
Rxearly = 0x00000008, /* Rx Early Threshold */
Rxidle = 0x00000010, /* Rx Idle */
Rxorn = 0x00000020, /* Rx Overrun */
Txok = 0x00000040, /* Tx Packet OK */
Txdesc = 0x00000080, /* Tx Descriptor */
Txerr = 0x00000100, /* Tx Packet Error */
Txidle = 0x00000200, /* Tx Idle */
Txurn = 0x00000400, /* Tx Underrun */
Mib = 0x00000800, /* MIB Service */
Swi = 0x00001000, /* Software Interrupt */
Pme = 0x00002000, /* Power Management Event */
Phy = 0x00004000, /* PHY Interrupt */
Hibint = 0x00008000, /* High Bits Interrupt Set */
Rxsovr = 0x00010000, /* Rx Status FIFO Overrun */
Rtabt = 0x00020000, /* Received Target Abort */
Rmabt = 0x00040000, /* Received Master Abort */
Sserr = 0x00080000, /* Signalled System Error */
Dperr = 0x00100000, /* Detected Parity Error */
Rxrcmp = 0x00200000, /* Receive Reset Complete */
Txrcmp = 0x00400000, /* Transmit Reset Complete */
Rxdesc0 = 0x00800000, /* Rx Descriptor for Priority Queue 0 */
Rxdesc1 = 0x01000000, /* Rx Descriptor for Priority Queue 1 */
Rxdesc2 = 0x02000000, /* Rx Descriptor for Priority Queue 2 */
Rxdesc3 = 0x04000000, /* Rx Descriptor for Priority Queue 3 */
Txdesc0 = 0x08000000, /* Tx Descriptor for Priority Queue 0 */
Txdesc1 = 0x10000000, /* Tx Descriptor for Priority Queue 1 */
Txdesc2 = 0x20000000, /* Tx Descriptor for Priority Queue 2 */
Txdesc3 = 0x40000000, /* Tx Descriptor for Priority Queue 3 */
};
enum { /* Interrupt Enable */
Ien = 0x00000001, /* Interrupt Enable */
};
enum { /* Interrupt Holdoff */
IhSHFT = 0, /* Interrupt Holdoff */
IhMASK = 0x000000FF,
Ihctl = 0x00000100, /* Interrupt Holdoff Control */
};
enum { /* Transmit Configuration */
TxdrthSHFT = 0, /* Tx Drain Threshold */
TxdrthMASK = 0x000000FF,
FlthSHFT = 16, /* Tx Fill Threshold */
FlthMASK = 0x0000FF00,
Brstdis = 0x00080000, /* 1000Mb/s Burst Disable */
MxdmaSHFT = 20, /* Max Size per Tx DMA Burst */
MxdmaMASK = 0x00700000,
Ecretryen = 0x00800000, /* Excessive Collision Retry Enable */
Atp = 0x10000000, /* Automatic Transmit Padding */
Mlb = 0x20000000, /* MAC Loopback */
Hbi = 0x40000000, /* Heartbeat Ignore */
Csi = 0x80000000, /* Carrier Sense Ignore */
};
enum { /* Receive Configuration */
RxdrthSHFT = 1, /* Rx Drain Threshold */
RxdrthMASK = 0x0000003E,
Airl = 0x04000000, /* Accept In-Range Length Errored */
Alp = 0x08000000, /* Accept Long Packets */
Rxfd = 0x10000000, /* Receive Full Duplex */
Stripcrc = 0x20000000, /* Strip CRC */
Arp = 0x40000000, /* Accept Runt Packets */
Aep = 0x80000000, /* Accept Errored Packets */
};
enum { /* Priority Queueing Control */
Txpqen = 0x00000001, /* Transmit Priority Queuing Enable */
Txfairen = 0x00000002, /* Transmit Fairness Enable */
RxpqenSHFT = 2, /* Receive Priority Queue Enable */
RxpqenMASK = 0x0000000C,
};
enum { /* Pause Control/Status */
PscntSHFT = 0, /* Pause Counter Value */
PscntMASK = 0x0000FFFF,
Pstx = 0x00020000, /* Transmit Pause Frame */
PsffloSHFT = 18, /* Rx Data FIFO Lo Threshold */
PsffloMASK = 0x000C0000,
PsffhiSHFT = 20, /* Rx Data FIFO Hi Threshold */
PsffhiMASK = 0x00300000,
PsstloSHFT = 22, /* Rx Stat FIFO Hi Threshold */
PsstloMASK = 0x00C00000,
PssthiSHFT = 24, /* Rx Stat FIFO Hi Threshold */
PssthiMASK = 0x03000000,
Psrcvd = 0x08000000, /* Pause Frame Received */
Psact = 0x10000000, /* Pause Active */
Psda = 0x20000000, /* Pause on Destination Address */
Psmcast = 0x40000000, /* Pause on Multicast */
Psen = 0x80000000, /* Pause Enable */
};
enum { /* Receive Filter/Match Control */
RfaddrSHFT = 0, /* Extended Register Address */
RfaddrMASK = 0x000003FF,
Ulm = 0x00080000, /* U/L bit mask */
Uhen = 0x00100000, /* Unicast Hash Enable */
Mhen = 0x00200000, /* Multicast Hash Enable */
Aarp = 0x00400000, /* Accept ARP Packets */
ApatSHFT = 23, /* Accept on Pattern Match */
ApatMASK = 0x07800000,
Apm = 0x08000000, /* Accept on Perfect Match */
Aau = 0x10000000, /* Accept All Unicast */
Aam = 0x20000000, /* Accept All Multicast */
Aab = 0x40000000, /* Accept All Broadcast */
Rfen = 0x80000000, /* Rx Filter Enable */
};
enum { /* Receive Filter/Match Data */
RfdataSHFT = 0, /* Receive Filter Data */
RfdataMASK = 0x0000FFFF,
BmaskSHFT = 16, /* Byte Mask */
BmaskMASK = 0x00030000,
};
enum { /* MIB Control */
Wrn = 0x00000001, /* Warning Test Indicator */
Frz = 0x00000002, /* Freeze All Counters */
Aclr = 0x00000004, /* Clear All Counters */
Mibs = 0x00000008, /* MIB Counter Strobe */
};
enum { /* MIB Data */
Nmibd = 11, /* Number of MIB Data Registers */
};
enum { /* VLAN/IP Receive Control */
Vtden = 0x00000001, /* VLAN Tag Detection Enable */
Vtren = 0x00000002, /* VLAN Tag Removal Enable */
Dvtf = 0x00000004, /* Discard VLAN Tagged Frames */
Dutf = 0x00000008, /* Discard Untagged Frames */
Ipen = 0x00000010, /* IP Checksum Enable */
Ripe = 0x00000020, /* Reject IP Checksum Errors */
Rtcpe = 0x00000040, /* Reject TCP Checksum Errors */
Rudpe = 0x00000080, /* Reject UDP Checksum Errors */
};
enum { /* VLAN/IP Transmit Control */
Vgti = 0x00000001, /* VLAN Global Tag Insertion */
Vppti = 0x00000002, /* VLAN Per-Packet Tag Insertion */
Gchk = 0x00000004, /* Global Checksum Generation */
Ppchk = 0x00000008, /* Per-Packet Checksum Generation */
};
enum { /* VLAN Data */
VtypeSHFT = 0, /* VLAN Type Field */
VtypeMASK = 0x0000FFFF,
VtciSHFT = 16, /* VLAN Tag Control Information */
VtciMASK = 0xFFFF0000,
};
enum { /* Clockrun Control/Status */
Clkrunen = 0x00000001, /* CLKRUN Enable */
Pmeen = 0x00000100, /* PME Enable */
Pmests = 0x00008000, /* PME Status */
};
typedef struct {
u32int link; /* Link to the next descriptor */
u32int bufptr; /* pointer to data Buffer */
int cmdsts; /* Command/Status */
int extsts; /* optional Extended Status */
Block* bp; /* Block containing bufptr */
u32int unused; /* pad to 64-bit */
} Desc;
enum { /* Common cmdsts bits */
SizeMASK = 0x0000FFFF, /* Descriptor Byte Count */
SizeSHFT = 0,
Ok = 0x08000000, /* Packet OK */
Crc = 0x10000000, /* Suppress/Include CRC */
Intr = 0x20000000, /* Interrupt on ownership transfer */
More = 0x40000000, /* not last descriptor in a packet */
Own = 0x80000000, /* Descriptor Ownership */
};
enum { /* Transmit cmdsts bits */
CcntMASK = 0x000F0000, /* Collision Count */
CcntSHFT = 16,
Ec = 0x00100000, /* Excessive Collisions */
Owc = 0x00200000, /* Out of Window Collision */
Ed = 0x00400000, /* Excessive Deferral */
Td = 0x00800000, /* Transmit Deferred */
Crs = 0x01000000, /* Carrier Sense Lost */
Tfu = 0x02000000, /* Transmit FIFO Underrun */
Txa = 0x04000000, /* Transmit Abort */
};
enum { /* Receive cmdsts bits */
Irl = 0x00010000, /* In-Range Length Error */
Lbp = 0x00020000, /* Loopback Packet */
Fae = 0x00040000, /* Frame Alignment Error */
Crce = 0x00080000, /* CRC Error */
Ise = 0x00100000, /* Invalid Symbol Error */
Runt = 0x00200000, /* Runt Packet Received */
Long = 0x00400000, /* Too Long Packet Received */
DestMASK = 0x01800000, /* Destination Class */
DestSHFT = 23,
Rxo = 0x02000000, /* Receive Overrun */
Rxa = 0x04000000, /* Receive Aborted */
};
enum { /* extsts bits */
EvtciMASK = 0x0000FFFF, /* VLAN Tag Control Information */
EvtciSHFT = 0,
Vpkt = 0x00010000, /* VLAN Packet */
Ippkt = 0x00020000, /* IP Packet */
Iperr = 0x00040000, /* IP Checksum Error */
Tcppkt = 0x00080000, /* TCP Packet */
Tcperr = 0x00100000, /* TCP Checksum Error */
Udppkt = 0x00200000, /* UDP Packet */
Udperr = 0x00400000, /* UDP Checksum Error */
};
enum {
Nrd = 32, /* was 256 */
Nrbf = 4*Nrd,
Rbsz = ROUNDUP(sizeof(Etherpkt)+8, 8),
Ntd = 8, /* was 128 */
};
typedef struct Ctlr Ctlr;
struct Ctlr {
int port;
Pcidev* pcidev;
Ctlr* next;
int active;
int id;
int eepromsz; /* address size in bits */
ushort* eeprom;
int* nic;
int cfg;
int imr;
Lock alock; /* attach */
Lock ilock; /* init */
void* alloc; /* base of per-Ctlr allocated data */
Mii* mii;
Lock rdlock; /* receive */
Desc* rd;
int nrd;
int nrb;
int rdx;
int rxcfg;
Lock tlock; /* transmit */
Desc* td;
int ntd;
int tdh;
int tdt;
int ntq;
int txcfg;
int rxidle;
uint mibd[Nmibd];
int ec;
int owc;
int ed;
int crs;
int tfu;
int txa;
};
#define csr32r(c, r) (*((c)->nic+((r)/4)))
#define csr32w(c, r, v) (*((c)->nic+((r)/4)) = (v))
static Ctlr* dp83820ctlrhead;
static Ctlr* dp83820ctlrtail;
static Lock dp83820rblock; /* free receive Blocks */
static Block* dp83820rbpool;
static char* dp83820mibs[Nmibd] = {
"RXErroredPkts",
"RXFCSErrors",
"RXMsdPktErrors",
"RXFAErrors",
"RXSymbolErrors",
"RXFrameToLong",
"RXIRLErrors",
"RXBadOpcodes",
"RXPauseFrames",
"TXPauseFrames",
"TXSQEErrors",
};
static int
mdior(Ctlr* ctlr, int n)
{
int data, i, mear, r;
mear = csr32r(ctlr, Mear);
r = ~(Mdc|Mddir) & mear;
data = 0;
for(i = n-1; i >= 0; i--){
if(csr32r(ctlr, Mear) & Mdio)
data |= (1<<i);
csr32w(ctlr, Mear, Mdc|r);
csr32w(ctlr, Mear, r);
}
csr32w(ctlr, Mear, mear);
return data;
}
static void
mdiow(Ctlr* ctlr, int bits, int n)
{
int i, mear, r;
mear = csr32r(ctlr, Mear);
r = Mddir|(~Mdc & mear);
for(i = n-1; i >= 0; i--){
if(bits & (1<<i))
r |= Mdio;
else
r &= ~Mdio;
csr32w(ctlr, Mear, r);
csr32w(ctlr, Mear, Mdc|r);
}
csr32w(ctlr, Mear, mear);
}
static int
dp83820miimir(Mii* mii, int pa, int ra)
{
int data;
Ctlr *ctlr;
ctlr = mii->ctlr;
/*
* MII Management Interface Read.
*
* Preamble;
* ST+OP+PA+RA;
* LT + 16 data bits.
*/
mdiow(ctlr, 0xFFFFFFFF, 32);
mdiow(ctlr, 0x1800|(pa<<5)|ra, 14);
data = mdior(ctlr, 18);
if(data & 0x10000)
return -1;
return data & 0xFFFF;
}
static int
dp83820miimiw(Mii* mii, int pa, int ra, int data)
{
Ctlr *ctlr;
ctlr = mii->ctlr;
/*
* MII Management Interface Write.
*
* Preamble;
* ST+OP+PA+RA+LT + 16 data bits;
* Z.
*/
mdiow(ctlr, 0xFFFFFFFF, 32);
data &= 0xFFFF;
data |= (0x05<<(5+5+2+16))|(pa<<(5+2+16))|(ra<<(2+16))|(0x02<<16);
mdiow(ctlr, data, 32);
return 0;
}
static Block *
dp83820rballoc(Desc* desc)
{
Block *bp;
if(desc->bp == nil){
ilock(&dp83820rblock);
if((bp = dp83820rbpool) == nil){
iunlock(&dp83820rblock);
desc->bp = nil;
desc->cmdsts = Own;
return nil;
}
dp83820rbpool = bp->next;
bp->next = nil;
iunlock(&dp83820rblock);
desc->bufptr = PCIWADDR(bp->rp);
desc->bp = bp;
}
else{
bp = desc->bp;
bp->rp = bp->lim - Rbsz;
bp->wp = bp->rp;
}
coherence();
desc->cmdsts = Intr|Rbsz;
return bp;
}
static void
dp83820rbfree(Block *bp)
{
bp->rp = bp->lim - Rbsz;
bp->wp = bp->rp;
ilock(&dp83820rblock);
bp->next = dp83820rbpool;
dp83820rbpool = bp;
iunlock(&dp83820rblock);
}
static void
dp83820halt(Ctlr* ctlr)
{
int i, timeo;
ilock(&ctlr->ilock);
csr32w(ctlr, Imr, 0);
csr32w(ctlr, Ier, 0);
csr32w(ctlr, Cr, Rxd|Txd);
for(timeo = 0; timeo < 1000; timeo++){
if(!(csr32r(ctlr, Cr) & (Rxe|Txe)))
break;
microdelay(1);
}
csr32w(ctlr, Mibc, Frz);
iunlock(&ctlr->ilock);
if(ctlr->rd != nil){
for(i = 0; i < ctlr->nrd; i++){
if(ctlr->rd[i].bp == nil)
continue;
freeb(ctlr->rd[i].bp);
ctlr->rd[i].bp = nil;
}
}
if(ctlr->td != nil){
for(i = 0; i < ctlr->ntd; i++){
if(ctlr->td[i].bp == nil)
continue;
freeb(ctlr->td[i].bp);
ctlr->td[i].bp = nil;
}
}
}
static void
dp83820cfg(Ctlr* ctlr)
{
int cfg;
/*
* Don't know how to deal with a TBI yet.
*/
if(ctlr->mii == nil)
return;
/*
* The polarity of these bits is at the mercy
* of the board designer.
* The correct answer for all speed and duplex questions
* should be to query the phy.
*/
cfg = csr32r(ctlr, Cfg);
if(!(cfg & Dupsts)){
ctlr->rxcfg |= Rxfd;
ctlr->txcfg |= Csi|Hbi;
iprint("83820: full duplex, ");
}
else{
ctlr->rxcfg &= ~Rxfd;
ctlr->txcfg &= ~(Csi|Hbi);
iprint("83820: half duplex, ");
}
csr32w(ctlr, Rxcfg, ctlr->rxcfg);
csr32w(ctlr, Txcfg, ctlr->txcfg);
switch(cfg & (Spdsts1000|Spdsts100)){
case Spdsts1000: /* 100Mbps */
default: /* 10Mbps */
ctlr->cfg &= ~Mode1000;
if((cfg & (Spdsts1000|Spdsts100)) == Spdsts1000)
iprint("100Mb/s\n");
else
iprint("10Mb/s\n");
break;
case Spdsts100: /* 1Gbps */
ctlr->cfg |= Mode1000;
iprint("1Gb/s\n");
break;
}
csr32w(ctlr, Cfg, ctlr->cfg);
}
static void
dp83820init(Ether* edev)
{
int i;
Ctlr *ctlr;
Desc *desc;
uchar *alloc;
ctlr = edev->ctlr;
dp83820halt(ctlr);
/*
* Receiver
*/
alloc = (uchar*)ROUNDUP((ulong)ctlr->alloc, 8);
ctlr->rd = (Desc*)alloc;
alloc += ctlr->nrd*sizeof(Desc);
memset(ctlr->rd, 0, ctlr->nrd*sizeof(Desc));
ctlr->rdx = 0;
for(i = 0; i < ctlr->nrd; i++){
desc = &ctlr->rd[i];
desc->link = PCIWADDR(&ctlr->rd[NEXT(i, ctlr->nrd)]);
if(dp83820rballoc(desc) == nil)
continue;
}
csr32w(ctlr, Rxdphi, 0);
csr32w(ctlr, Rxdp, PCIWADDR(ctlr->rd));
for(i = 0; i < Eaddrlen; i += 2){
csr32w(ctlr, Rfcr, i);
csr32w(ctlr, Rfdr, (edev->ea[i+1]<<8)|edev->ea[i]);
}
csr32w(ctlr, Rfcr, Rfen|Aab|Aam|Apm);
ctlr->rxcfg = Stripcrc|(((2*(ETHERMINTU+4))/8)<<RxdrthSHFT);
ctlr->imr |= Rxorn|Rxidle|Rxearly|Rxdesc|Rxok;
/*
* Transmitter.
*/
ctlr->td = (Desc*)alloc;
memset(ctlr->td, 0, ctlr->ntd*sizeof(Desc));
ctlr->tdh = ctlr->tdt = ctlr->ntq = 0;
for(i = 0; i < ctlr->ntd; i++){
desc = &ctlr->td[i];
desc->link = PCIWADDR(&ctlr->td[NEXT(i, ctlr->ntd)]);
}
csr32w(ctlr, Txdphi, 0);
csr32w(ctlr, Txdp, PCIWADDR(ctlr->td));
ctlr->txcfg = Atp|(((2*(ETHERMINTU+4))/32)<<FlthSHFT)|((4096/32)<<TxdrthSHFT);
ctlr->imr |= Txurn|Txidle|Txdesc|Txok;
ilock(&ctlr->ilock);
dp83820cfg(ctlr);
csr32w(ctlr, Mibc, Aclr);
ctlr->imr |= Mib;
csr32w(ctlr, Imr, ctlr->imr);
/* try coalescing adjacent interrupts; use hold-off interval of 100µs */
csr32w(ctlr, Ihr, Ihctl|(1<<IhSHFT));
csr32w(ctlr, Ier, Ien);
csr32w(ctlr, Cr, Rxe|Txe);
iunlock(&ctlr->ilock);
}
static void
dp83820attach(Ether* edev)
{
Block *bp;
Ctlr *ctlr;
ctlr = edev->ctlr;
lock(&ctlr->alock);
if(ctlr->alloc != nil){
unlock(&ctlr->alock);
return;
}
if(waserror()){
err:
if(ctlr->mii != nil){
free(ctlr->mii);
ctlr->mii = nil;
}
if(ctlr->alloc != nil){
free(ctlr->alloc);
ctlr->alloc = nil;
}
unlock(&ctlr->alock);
return;
}
if(!(ctlr->cfg & Tbien)){
if((ctlr->mii = malloc(sizeof(Mii))) == nil)
goto err;
ctlr->mii->ctlr = ctlr;
ctlr->mii->mir = dp83820miimir;
ctlr->mii->miw = dp83820miimiw;
if(mii(ctlr->mii, ~0) == 0)
goto err;
ctlr->cfg |= Dupstsien|Lnkstsien|Spdstsien;
ctlr->imr |= Phy;
}
ctlr->nrd = Nrd;
ctlr->nrb = Nrbf;
ctlr->ntd = Ntd;
ctlr->alloc = mallocz((ctlr->nrd+ctlr->ntd)*sizeof(Desc) + 7, 0);
if(ctlr->alloc == nil)
goto err;
/*
* the Bill Paul bsd drivers claim that receive buffers must be aligned
* on 8-byte boundaries.
*/
for(ctlr->nrb = 0; ctlr->nrb < Nrbf; ctlr->nrb++){
if((bp = allocb(Rbsz+8-1)) == nil)
break;
bp->rp += 8 - (uintptr)bp->rp % 8;
bp->wp = bp->rp;
// bp->free = dp83820rbfree; /* TODO: fix */
dp83820rbfree(bp);
}
dp83820init(edev);
unlock(&ctlr->alock);
poperror();
}
/*
* free a list of blocks
*/
static void
freeblist(Block *b)
{
Block *next;
for(; b != 0; b = next){
next = b->next;
b->next = 0;
freeb(b);
}
}
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 no one is expecting packets from the network */
}
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
dp83820transmit(Ether* edev)
{
Block *bp;
Ctlr *ctlr;
Desc *desc;
RingBuf *tb;
int cmdsts, r, x;
ctlr = edev->ctlr;
ilock(&ctlr->tlock);
bp = nil;
for(x = ctlr->tdh; ctlr->ntq; x = NEXT(x, ctlr->ntd)){
desc = &ctlr->td[x];
if((cmdsts = desc->cmdsts) & Own)
break;
if(!(cmdsts & Ok)){
if(cmdsts & Ec)
ctlr->ec++;
if(cmdsts & Owc)
ctlr->owc++;
if(cmdsts & Ed)
ctlr->ed++;
if(cmdsts & Crs)
ctlr->crs++;
if(cmdsts & Tfu)
ctlr->tfu++;
if(cmdsts & Txa)
ctlr->txa++;
}
desc->bp->next = bp;
bp = desc->bp;
desc->bp = nil;
ctlr->ntq--;
}
ctlr->tdh = x;
if(bp != nil)
freeblist(bp);
x = ctlr->tdt;
// tb = &edev->tb[edev->ti];
while(ctlr->ntq < ctlr->ntd - 1 /* && tb->owner == Interface */ ){
bp = fromringbuf(edev);
if (bp == nil)
break;
/* transmit packet from bp */
desc = &ctlr->td[x];
desc->bufptr = PCIWADDR(bp->rp);
desc->bp = bp;
ctlr->ntq++;
coherence();
desc->cmdsts = Own|Intr|BLEN(bp); /* kick transmitter */
//print("t");
tb = &edev->tb[edev->ti];
tb->owner = Host; /* give descriptor back */
edev->ti = NEXT(edev->ti, edev->ntb);
x = NEXT(x, ctlr->ntd);
}
if(x != ctlr->tdt){
ctlr->tdt = x;
r = csr32r(ctlr, Cr);
csr32w(ctlr, Cr, Txe|r);
}
iunlock(&ctlr->tlock);
}
static void
dp83820interrupt(Ureg*, void* arg)
{
Block *bp;
Ctlr *ctlr;
Desc *desc;
Ether *edev;
int cmdsts, i, isr, r, x;
edev = arg;
ctlr = edev->ctlr;
for(isr = csr32r(ctlr, Isr); isr & ctlr->imr; isr = csr32r(ctlr, Isr)){
if(isr & (Rxorn|Rxidle|Rxearly|Rxerr|Rxdesc|Rxok)){
x = ctlr->rdx;
desc = &ctlr->rd[x];
while((cmdsts = desc->cmdsts) & Own){
if((cmdsts & Ok) && desc->bp != nil){
/* receive a packet into desc->bp */
bp = desc->bp;
desc->bp = nil;
// bp->rp = desc->bufptr;
bp->wp += cmdsts & SizeMASK;
toringbuf(edev, bp);
//print("r");
}
dp83820rballoc(desc);
x = NEXT(x, ctlr->nrd);
desc = &ctlr->rd[x];
}
ctlr->rdx = x;
if(isr & Rxidle){
r = csr32r(ctlr, Cr);
csr32w(ctlr, Cr, Rxe|r);
ctlr->rxidle++;
}
isr &= ~(Rxorn|Rxidle|Rxearly|Rxerr|Rxdesc|Rxok);
}
if(isr & Txurn){
x = (ctlr->txcfg & TxdrthMASK)>>TxdrthSHFT;
r = (ctlr->txcfg & FlthMASK)>>FlthSHFT;
if(x < ((TxdrthMASK)>>TxdrthSHFT)
&& x < (2048/32 - r)){
ctlr->txcfg &= ~TxdrthMASK;
x++;
ctlr->txcfg |= x<<TxdrthSHFT;
csr32w(ctlr, Txcfg, ctlr->txcfg);
}
}
if(isr & (Txurn|Txidle|Txdesc|Txok)){
dp83820transmit(edev);
isr &= ~(Txurn|Txidle|Txdesc|Txok);
}
if(isr & Mib){
for(i = 0; i < Nmibd; i++){
r = csr32r(ctlr, Mibd+(i*sizeof(int)));
ctlr->mibd[i] += r & 0xFFFF;
}
isr &= ~Mib;
}
if((isr & Phy) && ctlr->mii != nil){
ctlr->mii->mir(ctlr->mii, 1, Bmsr);
print("phy: cfg %8.8uX bmsr %4.4uX\n",
csr32r(ctlr, Cfg),
ctlr->mii->mir(ctlr->mii, 1, Bmsr));
dp83820cfg(ctlr);
isr &= ~Phy;
}
// TODO fix if(isr)
// TODO fix iprint("dp83820: isr %8.8uX\n", isr);
USED(isr);
}
}
static int
dp83820detach(Ctlr* ctlr)
{
/*
* Soft reset the controller.
*/
csr32w(ctlr, Cr, Rst);
delay(1);
while(csr32r(ctlr, Cr) & Rst)
delay(1);
return 0;
}
static void
dp83820shutdown(Ether* ether)
{
print("dp83820shutdown\n");
dp83820detach(ether->ctlr);
}
static int
atc93c46r(Ctlr* ctlr, int address)
{
int data, i, mear, r, size;
/*
* Analog Technology, Inc. ATC93C46
* or equivalent serial EEPROM.
*/
mear = csr32r(ctlr, Mear);
mear &= ~(Eesel|Eeclk|Eedo|Eedi);
r = Eesel|mear;
reread:
csr32w(ctlr, Mear, r);
data = 0x06;
for(i = 3-1; i >= 0; i--){
if(data & (1<<i))
r |= Eedi;
else
r &= ~Eedi;
csr32w(ctlr, Mear, r);
csr32w(ctlr, Mear, Eeclk|r);
microdelay(1);
csr32w(ctlr, Mear, r);
microdelay(1);
}
/*
* First time through must work out the EEPROM size.
*/
if((size = ctlr->eepromsz) == 0)
size = 8;
for(size = size-1; size >= 0; size--){
if(address & (1<<size))
r |= Eedi;
else
r &= ~Eedi;
csr32w(ctlr, Mear, r);
microdelay(1);
csr32w(ctlr, Mear, Eeclk|r);
microdelay(1);
csr32w(ctlr, Mear, r);
microdelay(1);
if(!(csr32r(ctlr, Mear) & Eedo))
break;
}
r &= ~Eedi;
data = 0;
for(i = 16-1; i >= 0; i--){
csr32w(ctlr, Mear, Eeclk|r);
microdelay(1);
if(csr32r(ctlr, Mear) & Eedo)
data |= (1<<i);
csr32w(ctlr, Mear, r);
microdelay(1);
}
csr32w(ctlr, Mear, mear);
if(ctlr->eepromsz == 0){
ctlr->eepromsz = 8-size;
ctlr->eeprom = malloc((1<<ctlr->eepromsz)*sizeof(ushort));
goto reread;
}
return data;
}
static int
dp83820reset(Ctlr* ctlr)
{
int i, r;
unsigned char sum;
/*
* Soft reset the controller;
* read the EEPROM to get the initial settings
* of the Cfg and Gpior bits which should be cleared by
* the reset.
*/
csr32w(ctlr, Cr, Rst);
delay(1);
while(csr32r(ctlr, Cr) & Rst)
delay(1);
atc93c46r(ctlr, 0);
if(ctlr->eeprom == nil) {
print("dp83820reset: no eeprom\n");
return -1;
}
sum = 0;
for(i = 0; i < 0x0E; i++){
r = atc93c46r(ctlr, i);
ctlr->eeprom[i] = r;
sum += r;
sum += r>>8;
}
if(sum != 0){
print("dp83820reset: bad EEPROM checksum\n");
return -1;
}
#ifdef notdef
csr32w(ctlr, Gpior, ctlr->eeprom[4]);
cfg = Extstsen|Exd;
r = csr32r(ctlr, Cfg);
if(ctlr->eeprom[5] & 0x0001)
cfg |= Ext125;
if(ctlr->eeprom[5] & 0x0002)
cfg |= M64addren;
if((ctlr->eeprom[5] & 0x0004) && (r & Pci64det))
cfg |= Data64en;
if(ctlr->eeprom[5] & 0x0008)
cfg |= T64addren;
if(!(pcicfgr16(ctlr->pcidev, PciPCR) & 0x10))
cfg |= Mwidis;
if(ctlr->eeprom[5] & 0x0020)
cfg |= Mrmdis;
if(ctlr->eeprom[5] & 0x0080)
cfg |= Mode1000;
if(ctlr->eeprom[5] & 0x0200)
cfg |= Tbien|Mode1000;
/*
* What about RO bits we might have destroyed with Rst?
* What about Exd, Tmrtest, Extstsen, Pintctl?
* Why does it think it has detected a 64-bit bus when
* it hasn't?
*/
#else
//r = csr32r(ctlr, Cfg);
//r &= ~(Mode1000|T64addren|Data64en|M64addren);
//csr32w(ctlr, Cfg, r);
//csr32w(ctlr, Cfg, 0x2000);
#endif /* notdef */
ctlr->cfg = csr32r(ctlr, Cfg);
print("cfg %8.8uX pcicfg %8.8uX\n", ctlr->cfg, pcicfgr32(ctlr->pcidev, PciPCR));
ctlr->cfg &= ~(T64addren|Data64en|M64addren);
csr32w(ctlr, Cfg, ctlr->cfg);
csr32w(ctlr, Mibc, Aclr|Frz);
return 0;
}
static void
dp83820pci(void)
{
int port;
Pcidev *p;
Ctlr *ctlr;
p = nil;
while(p = pcimatch(p, 0, 0)){
if(p->ccrb != 0x02 || p->ccru != 0)
continue;
switch((p->did<<16)|p->vid){
default:
continue;
case (0x0022<<16)|0x100B: /* DP83820 (Gig-NIC) */
break;
}
port = upamalloc(p->mem[1].bar & ~0x0F, p->mem[1].size, 0);
if(port == 0){
print("dp83820: can't map %d @ 0x%8.8luX\n",
p->mem[1].size, p->mem[1].bar);
continue;
}
ctlr = malloc(sizeof(Ctlr));
ctlr->port = port;
ctlr->pcidev = p;
ctlr->id = p->did<<16 | p->vid;
ctlr->nic = KADDR(ctlr->port);
if(dp83820reset(ctlr)){
free(ctlr);
continue;
}
pcisetbme(p);
if(dp83820ctlrhead != nil)
dp83820ctlrtail->next = ctlr;
else
dp83820ctlrhead = ctlr;
dp83820ctlrtail = ctlr;
}
}
int
dp83820pnp(Ether* edev)
{
int i;
Ctlr *ctlr;
uchar ea[Eaddrlen];
if(dp83820ctlrhead == nil)
dp83820pci();
/*
* Any adapter matches if no edev->port is supplied,
* otherwise the ports must match.
*/
for(ctlr = dp83820ctlrhead; 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;
/*
* Check if the adapter's station address is to be overridden.
* If not, read it from the EEPROM and set in ether->ea prior to
* loading the station address in the hardware.
*/
memset(ea, 0, Eaddrlen);
if(memcmp(ea, edev->ea, Eaddrlen) == 0)
for(i = 0; i < Eaddrlen/2; i++){
edev->ea[2*i] = ctlr->eeprom[0x0C-i];
edev->ea[2*i+1] = ctlr->eeprom[0x0C-i]>>8;
}
edev->attach = dp83820attach;
edev->transmit = dp83820transmit;
edev->interrupt = dp83820interrupt;
edev->detach = dp83820shutdown;
return 0;
}