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minix/drivers/lance/lance.c
Lionel Sambuc c3fc9df84a Adding ipc_ prefix to ipc primitives 
* Also change _orig to _intr for clarity
 * Cleaned up {IPC,KER}VEC
 * Renamed _minix_kernel_info_struct to get_minix_kerninfo
 * Merged _senda.S into _ipc.S
 * Moved into separate files get_minix_kerninfo and _do_kernel_call
 * Adapted do_kernel_call to follow same _ convention as ipc functions
 * Drop patches in libc/net/send.c and libc/include/namespace.h

Change-Id: If4ea21ecb65435170d7d87de6c826328e84c18d0
2014-03-01 09:05:01 +01:00

1618 lines
46 KiB
C
Raw Blame History

/*
* lance.c
*
* This file contains a ethernet device driver for AMD LANCE based ethernet
* cards.
*
* The valid messages and their parameters are:
*
* m_type DL_COUNT DL_MODE DL_GRANT
* |--------------+----------+---------+---------|
* | DL_WRITEV_S | count | | grant |
* |--------------|----------|---------|---------|
* | DL_READV_S | count | | grant |
* |--------------|----------|---------|---------|
* | DL_CONF | | mode | |
* |--------------|----------|---------|---------|
* | DL_GETSTAT_S | | | grant |
* |--------------|----------|---------|---------|
* | hardware int | | | |
* |--------------|----------|---------|---------|
*
* The messages sent are:
*
* m_type DL_COUNT DL_FLAGS
* |---------------+----------+---------|
* | DL_TASK_REPLY | rd-count | flags |
* |---------------|----------|---------|
*
* m_type
* |---------------|
* | DL_STAT_REPLY |
* |---------------|
*
* m_type DL_STAT DL_ADDR
* |---------------+---------+---------------|
* | DL_CONF_REPLY | code | ethernet addr |
* |---------------|---------|---------------|
*
* Created: Jul 27, 2002 by Kazuya Kodama <kazuya@nii.ac.jp>
* Adapted for Minix 3: Sep 05, 2005 by Joren l'Ami <jwlami@cs.vu.nl>
*/
#define VERBOSE 0 /* Verbose debugging output */
#define LANCE_FKEY 0 /* Use function key to dump Lance stats */
#include <minix/drivers.h>
#include <minix/netdriver.h>
#include <net/hton.h>
#include <net/gen/ether.h>
#include <net/gen/eth_io.h>
#include <assert.h>
#include <minix/syslib.h>
#include <minix/endpoint.h>
#include <machine/pci.h>
#include <minix/ds.h>
#include "lance.h"
static ether_card_t ec_state;
static int ec_instance;
/* Configuration */
typedef struct ec_conf
{
port_t ec_port;
int ec_irq;
phys_bytes ec_mem;
} ec_conf_t;
/* We hardly use these. Just "LANCE0=on/off" "LANCE1=on/off" mean. */
#define EC_CONF_NR 3
ec_conf_t ec_conf[EC_CONF_NR]= /* Card addresses */
{
/* I/O port, IRQ, Buffer address. */
{ 0x1000, 9, 0x00000, },
{ 0xD000, 15, 0x00000, },
{ 0x0000, 0, 0x00000, },
};
/* General */
static void do_init(message *mp);
static void ec_init(ether_card_t *ec);
static void ec_confaddr(ether_card_t *ec);
static void ec_reinit(ether_card_t *ec);
static void ec_check_ints(ether_card_t *ec);
static void conf_hw(ether_card_t *ec);
static void update_conf(ether_card_t *ec, ec_conf_t *ecp);
static void mess_reply(message *req, message *reply);
static void do_int(ether_card_t *ec);
static void reply(ether_card_t *ec);
static void ec_reset(ether_card_t *ec);
static void ec_send(ether_card_t *ec);
static void ec_recv(ether_card_t *ec);
static void do_vwrite_s(message *mp, int from_int);
static void do_vread_s(const message *mp);
static void ec_user2nic(ether_card_t *dep, iovec_dat_t *iovp, vir_bytes
offset, int nic_addr, vir_bytes count);
static void ec_nic2user(ether_card_t *ec, int nic_addr, iovec_dat_t
*iovp, vir_bytes offset, vir_bytes count);
static int calc_iovec_size(iovec_dat_t *iovp);
static void ec_next_iovec(iovec_dat_t *iovp);
static void do_getstat_s(message *mp);
static void lance_stop(ether_card_t *ec);
static void lance_dump(void);
static void getAddressing(int devind, ether_card_t *ec);
/* probe+init LANCE cards */
static int lance_probe(ether_card_t *ec, int skip);
static void lance_init_card(ether_card_t *ec);
/* Accesses Lance Control and Status Registers */
static u8_t in_byte(port_t port);
static u16_t in_word(port_t port);
static void out_word(port_t port, u16_t value);
static u16_t read_csr(port_t ioaddr, u16_t csrno);
static void write_csr(port_t ioaddr, u16_t csrno, u16_t value);
/* --- LANCE --- */
/* General */
typedef unsigned long Address;
#define virt_to_bus(x) (vir2phys((unsigned long)x))
unsigned long vir2phys( unsigned long x )
{
int r;
unsigned long value;
if ( (r=sys_umap( SELF, VM_D, x, 4, &value )) != OK ) {
printf("lance: umap of 0x%lx failed\n",x );
panic("sys_umap failed: %d", r);
}
return value;
}
/* DMA limitations */
#define DMA_ADDR_MASK 0xFFFFFF /* mask to verify DMA address is 24-bit */
#define CORRECT_DMA_MEM() ( (virt_to_bus(lance_buf + sizeof(struct lance_interface)) & ~DMA_ADDR_MASK) == 0 )
#define ETH_FRAME_LEN 1518
#define LANCE_MUST_PAD 0x00000001
#define LANCE_ENABLE_AUTOSELECT 0x00000002
#define LANCE_SELECT_PHONELINE 0x00000004
#define LANCE_MUST_UNRESET 0x00000008
static const struct lance_chip_type
{
int id_number;
const char *name;
int flags;
} chip_table[] = {
{0x0000, "LANCE 7990", /* Ancient lance chip. */
LANCE_MUST_PAD + LANCE_MUST_UNRESET},
{0x0003, "PCnet/ISA 79C960", /* 79C960 PCnet/ISA. */
LANCE_ENABLE_AUTOSELECT},
{0x2260, "PCnet/ISA+ 79C961", /* 79C961 PCnet/ISA+, Plug-n-Play. */
LANCE_ENABLE_AUTOSELECT},
{0x2420, "PCnet/PCI 79C970", /* 79C970 or 79C974 PCnet-SCSI, PCI. */
LANCE_ENABLE_AUTOSELECT},
{0x2430, "PCnet32", /* 79C965 PCnet for VL bus. */
LANCE_ENABLE_AUTOSELECT},
{0x2621, "PCnet/PCI-II 79C970A", /* 79C970A PCInetPCI II. */
LANCE_ENABLE_AUTOSELECT},
{0x2625, "PCnet-FAST III 79C973",/* 79C973 PCInet-FAST III. */
LANCE_ENABLE_AUTOSELECT},
{0x2626, "PCnet/HomePNA 79C978",
LANCE_ENABLE_AUTOSELECT|LANCE_SELECT_PHONELINE},
{0x0, "PCnet (unknown)",
LANCE_ENABLE_AUTOSELECT},
};
/* ############## for LANCE device ############## */
#define LANCE_ETH_ADDR 0x0
#define LANCE_DATA 0x10
#define LANCE_ADDR 0x12
#define LANCE_RESET 0x14
#define LANCE_BUS_IF 0x16
#define LANCE_TOTAL_SIZE 0x18
/* Use 2^4=16 {Rx,Tx} buffers */
#define LANCE_LOG_RX_BUFFERS 4
#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
#define LANCE_LOG_TX_BUFFERS 4
#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
/* for lance_interface */
struct lance_init_block
{
unsigned short mode;
unsigned char phys_addr[6];
unsigned long filter[2];
Address rx_ring;
Address tx_ring;
};
struct lance_rx_head
{
union {
Address base;
unsigned char addr[4];
} u;
short buf_length; /* 2s complement */
short msg_length;
};
struct lance_tx_head
{
union {
Address base;
unsigned char addr[4];
} u;
short buf_length; /* 2s complement */
short misc;
};
struct lance_interface
{
struct lance_init_block init_block;
struct lance_rx_head rx_ring[RX_RING_SIZE];
struct lance_tx_head tx_ring[TX_RING_SIZE];
unsigned char rbuf[RX_RING_SIZE][ETH_FRAME_LEN];
unsigned char tbuf[TX_RING_SIZE][ETH_FRAME_LEN];
};
/* =============== global variables =============== */
/* AKA the stuff that really should have been in ether_card_t */
static struct lance_interface *lp;
#define LANCE_BUF_SIZE (sizeof(struct lance_interface))
static char *lance_buf = NULL;
static int rx_slot_nr = 0; /* Rx-slot number */
static int tx_slot_nr = 0; /* Tx-slot number */
static int cur_tx_slot_nr = 0; /* Tx-slot number */
static char isstored[TX_RING_SIZE]; /* Tx-slot in-use */
phys_bytes lance_buf_phys;
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
static void sef_cb_signal_handler(int signo);
/*===========================================================================*
* main *
*===========================================================================*/
int main( int argc, char **argv )
{
message m;
int ipc_status;
int r;
ether_card_t *ec;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
ec= &ec_state;
while (TRUE)
{
if (ec->ec_irq != 0)
sys_irqenable(&ec->ec_hook);
if ((r= netdriver_receive(ANY, &m, &ipc_status)) != OK)
panic("netdriver_receive failed: %d", r);
if (ec->ec_irq != 0)
sys_irqdisable(&ec->ec_hook);
if (is_ipc_notify(ipc_status)) {
switch(_ENDPOINT_P(m.m_source)) {
case TTY_PROC_NR:
lance_dump();
break;
case HARDWARE:
if (ec->mode == EC_ENABLED)
{
ec->ec_int_pending = 0;
ec_check_ints(ec);
do_int(ec);
}
break;
default:
panic("illegal notify source: %d", m.m_source);
}
/* get next message */
continue;
}
switch (m.m_type)
{
case DL_WRITEV_S:
do_vwrite_s(&m, FALSE);
break;
case DL_READV_S:
do_vread_s(&m);
break;
case DL_CONF:
do_init(&m);
break;
case DL_GETSTAT_S:
do_getstat_s(&m);
break;
default:
panic("illegal message: %d", m.m_type);
}
}
return 0;
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
static void sef_local_startup()
{
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_lu(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fresh);
/* Register live update callbacks. */
sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_workfree);
/* Register signal callbacks. */
sef_setcb_signal_handler(sef_cb_signal_handler);
/* Let SEF perform startup. */
sef_startup();
}
/*===========================================================================*
* sef_cb_init_fresh *
*===========================================================================*/
static int sef_cb_init_fresh(int type, sef_init_info_t *UNUSED(info))
{
/* Initialize the lance driver. */
long v;
#if LANCE_FKEY
int r, fkeys, sfkeys;
#endif
#if LANCE_FKEY
fkeys = sfkeys = 0;
bit_set( sfkeys, 7 );
if ( (r = fkey_map(&fkeys, &sfkeys)) != OK )
printf("Warning: lance couldn't observe Shift+F7 key: %d\n",r);
#endif
v = 0;
(void) env_parse("instance", "d", 0, &v, 0, 255);
ec_instance = (int) v;
/* Announce we are up! */
netdriver_announce();
return OK;
}
/*===========================================================================*
* sef_cb_signal_handler *
*===========================================================================*/
static void sef_cb_signal_handler(int signo)
{
/* Only check for termination signal, ignore anything else. */
if (signo != SIGTERM) return;
if (ec_state.mode == EC_ENABLED)
lance_stop(&ec_state);
#if VERBOSE
printf("LANCE driver stopped.\n");
#endif
exit(0);
}
/*===========================================================================*
* lance_dump *
*===========================================================================*/
static void lance_dump()
{
ether_card_t *ec;
int isr, csr;
unsigned short ioaddr;
printf("\n");
ec = &ec_state;
if (ec->mode == EC_DISABLED)
printf("lance instance %d is disabled\n", ec_instance);
else if (ec->mode == EC_SINK)
printf("lance instance %d is in sink mode\n", ec_instance);
if (ec->mode != EC_ENABLED)
return;
printf("lance statistics of instance %d:\n", ec_instance);
printf("recvErr :%8ld\t", ec->eth_stat.ets_recvErr);
printf("sendErr :%8ld\t", ec->eth_stat.ets_sendErr);
printf("OVW :%8ld\n", ec->eth_stat.ets_OVW);
printf("CRCerr :%8ld\t", ec->eth_stat.ets_CRCerr);
printf("frameAll :%8ld\t", ec->eth_stat.ets_frameAll);
printf("missedP :%8ld\n", ec->eth_stat.ets_missedP);
printf("packetR :%8ld\t", ec->eth_stat.ets_packetR);
printf("packetT :%8ld\t", ec->eth_stat.ets_packetT);
printf("transDef :%8ld\n", ec->eth_stat.ets_transDef);
printf("collision :%8ld\t", ec->eth_stat.ets_collision);
printf("transAb :%8ld\t", ec->eth_stat.ets_transAb);
printf("carrSense :%8ld\n", ec->eth_stat.ets_carrSense);
printf("fifoUnder :%8ld\t", ec->eth_stat.ets_fifoUnder);
printf("fifoOver :%8ld\t", ec->eth_stat.ets_fifoOver);
printf("CDheartbeat:%8ld\n", ec->eth_stat.ets_CDheartbeat);
printf("OWC :%8ld\t", ec->eth_stat.ets_OWC);
ioaddr = ec->ec_port;
isr = read_csr(ioaddr, LANCE_CSR0);
printf("isr = 0x%x, flags = 0x%x\n", isr,
ec->flags);
printf("irq = %d\tioadr = 0x%x\n", ec->ec_irq, ec->ec_port);
csr = read_csr(ioaddr, LANCE_CSR0);
printf("CSR0: 0x%x\n", csr);
csr = read_csr(ioaddr, LANCE_CSR3);
printf("CSR3: 0x%x\n", csr);
csr = read_csr(ioaddr, LANCE_CSR4);
printf("CSR4: 0x%x\n", csr);
csr = read_csr(ioaddr, LANCE_CSR5);
printf("CSR5: 0x%x\n", csr);
csr = read_csr(ioaddr, LANCE_CSR15);
printf("CSR15: 0x%x\n", csr);
}
/*===========================================================================*
* do_init *
*===========================================================================*/
static void do_init(mp)
message *mp;
{
ether_card_t *ec;
message reply_mess;
pci_init();
if(!lance_buf && !(lance_buf = alloc_contig(LANCE_BUF_SIZE, AC_ALIGN4K|AC_LOWER16M, &lance_buf_phys))) {
panic("alloc_contig failed: %d", LANCE_BUF_SIZE);
}
ec= &ec_state;
strlcpy(ec->port_name, "lance#0", sizeof(ec->port_name));
ec->port_name[6] += ec_instance;
if (ec->mode == EC_DISABLED)
{
/* This is the default, try to (re)locate the device. */
/* only try to enable if memory is correct for DMA */
if ( CORRECT_DMA_MEM() )
{
conf_hw(ec);
}
else
{
printf("LANCE: DMA denied because address out of range\n" );
}
if (ec->mode == EC_DISABLED)
{
/* Probe failed, or the device is configured off. */
reply_mess.m_type= DL_CONF_REPLY;
reply_mess.DL_STAT = ENXIO;
mess_reply(mp, &reply_mess);
return;
}
if (ec->mode == EC_ENABLED)
ec_init(ec);
}
if (ec->mode == EC_SINK)
{
ec->mac_address.ea_addr[0] =
ec->mac_address.ea_addr[1] =
ec->mac_address.ea_addr[2] =
ec->mac_address.ea_addr[3] =
ec->mac_address.ea_addr[4] =
ec->mac_address.ea_addr[5] = 0;
ec_confaddr(ec);
reply_mess.m_type = DL_CONF_REPLY;
reply_mess.DL_STAT = OK;
*(ether_addr_t *) reply_mess.DL_HWADDR = ec->mac_address;
mess_reply(mp, &reply_mess);
return;
}
assert(ec->mode == EC_ENABLED);
assert(ec->flags & ECF_ENABLED);
ec->flags &= ~(ECF_PROMISC | ECF_MULTI | ECF_BROAD);
if (mp->DL_MODE & DL_PROMISC_REQ)
ec->flags |= ECF_PROMISC | ECF_MULTI | ECF_BROAD;
if (mp->DL_MODE & DL_MULTI_REQ)
ec->flags |= ECF_MULTI;
if (mp->DL_MODE & DL_BROAD_REQ)
ec->flags |= ECF_BROAD;
ec_reinit(ec);
reply_mess.m_type = DL_CONF_REPLY;
reply_mess.DL_STAT = OK;
*(ether_addr_t *) reply_mess.DL_HWADDR = ec->mac_address;
mess_reply(mp, &reply_mess);
}
/*===========================================================================*
* do_int *
*===========================================================================*/
static void do_int(ec)
ether_card_t *ec;
{
if (ec->flags & (ECF_PACK_SEND | ECF_PACK_RECV))
reply(ec);
}
/*===========================================================================*
* conf_hw *
*===========================================================================*/
static void conf_hw(ec)
ether_card_t *ec;
{
static eth_stat_t empty_stat = {0, 0, 0, 0, 0, 0 /* ,... */ };
int confnr;
ec_conf_t *ecp;
ec->mode= EC_DISABLED; /* Superfluous */
/* Pick a default configuration. This hardly matters anymore. */
confnr= MIN(ec_instance, EC_CONF_NR-1);
ecp= &ec_conf[confnr];
update_conf(ec, ecp);
if (ec->mode != EC_ENABLED)
return;
if (!lance_probe(ec, ec_instance))
{
printf("%s: No ethernet card found on PCI-BIOS info.\n",
ec->port_name);
ec->mode= EC_DISABLED;
return;
}
/* XXX */ if (ec->ec_linmem == 0) ec->ec_linmem= 0xFFFF0000;
ec->flags = ECF_EMPTY;
ec->eth_stat = empty_stat;
}
/*===========================================================================*
* update_conf *
*===========================================================================*/
static void update_conf(ec, ecp)
ether_card_t *ec;
ec_conf_t *ecp;
{
long v;
char eckey[16];
static char ec_fmt[] = "x:d:x:x";
/* Get the default settings and modify them from the environment. */
strlcpy(eckey, "LANCE0", sizeof(eckey));
eckey[5] += ec_instance;
ec->mode= EC_SINK;
v= ecp->ec_port;
switch (env_parse(eckey, ec_fmt, 0, &v, 0x0000L, 0xFFFFL))
{
case EP_OFF:
ec->mode= EC_DISABLED;
break;
case EP_ON:
case EP_SET:
default:
ec->mode= EC_ENABLED; /* Might become disabled if
* all probes fail */
break;
}
ec->ec_port= v;
v= ecp->ec_irq | DEI_DEFAULT;
(void) env_parse(eckey, ec_fmt, 1, &v, 0L, (long) NR_IRQ_VECTORS - 1);
ec->ec_irq= v;
v= ecp->ec_mem;
(void) env_parse(eckey, ec_fmt, 2, &v, 0L, 0xFFFFFL);
ec->ec_linmem= v;
v= 0;
(void) env_parse(eckey, ec_fmt, 3, &v, 0x2000L, 0x8000L);
ec->ec_ramsize= v;
}
/*===========================================================================*
* ec_init *
*===========================================================================*/
static void ec_init(ec)
ether_card_t *ec;
{
int r;
#if VERBOSE
int i;
#endif
/* General initialization */
ec->flags = ECF_EMPTY;
lance_init_card(ec); /* Get mac_address, etc ...*/
ec_confaddr(ec);
#if VERBOSE
printf("%s: Ethernet address ", ec->port_name);
for (i= 0; i < 6; i++)
printf("%x%c", ec->mac_address.ea_addr[i],
i < 5 ? ':' : '\n');
#endif
/* Finish the initialization */
ec->flags |= ECF_ENABLED;
/* Set the interrupt handler */
ec->ec_hook = ec->ec_irq;
if ((r=sys_irqsetpolicy(ec->ec_irq, 0, &ec->ec_hook)) != OK)
printf("lance: error, couldn't set IRQ policy: %d\n", r);
return;
}
/*===========================================================================*
* reply *
*===========================================================================*/
static void reply(ec)
ether_card_t *ec;
{
message reply;
int flags,r;
flags = DL_NOFLAGS;
if (ec->flags & ECF_PACK_SEND)
flags |= DL_PACK_SEND;
if (ec->flags & ECF_PACK_RECV)
flags |= DL_PACK_RECV;
reply.m_type = DL_TASK_REPLY;
reply.DL_FLAGS = flags;
reply.DL_COUNT = ec->read_s;
r = ipc_send(ec->client, &reply);
if (r < 0)
panic("ipc_send failed: %d", r);
ec->read_s = 0;
ec->flags &= ~(ECF_PACK_SEND | ECF_PACK_RECV);
}
/*===========================================================================*
* mess_reply *
*===========================================================================*/
static void mess_reply(req, reply_mess)
message *req;
message *reply_mess;
{
if (ipc_send(req->m_source, reply_mess) != OK)
panic("unable to mess_reply");
}
/*===========================================================================*
* ec_confaddr *
*===========================================================================*/
static void ec_confaddr(ec)
ether_card_t *ec;
{
int i;
char eakey[16];
static char eafmt[]= "x:x:x:x:x:x";
long v;
/* User defined ethernet address? */
strlcpy(eakey, "LANCE0_EA", sizeof(eakey));
eakey[5] += ec_instance;
for (i = 0; i < 6; i++)
{
v= ec->mac_address.ea_addr[i];
if (env_parse(eakey, eafmt, i, &v, 0x00L, 0xFFL) != EP_SET)
break;
ec->mac_address.ea_addr[i]= v;
}
if (i != 0 && i != 6)
{
/* It's all or nothing; force a panic. */
(void) env_parse(eakey, "?", 0, &v, 0L, 0L);
}
}
/*===========================================================================*
* ec_reinit *
*===========================================================================*/
static void ec_reinit(ec)
ether_card_t *ec;
{
int i;
unsigned short ioaddr = ec->ec_port;
/* stop */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STOP);
/* purge Tx-ring */
tx_slot_nr = cur_tx_slot_nr = 0;
for (i=0; i<TX_RING_SIZE; i++)
{
lp->tx_ring[i].u.base = 0;
isstored[i]=0;
}
/* re-init Rx-ring */
rx_slot_nr = 0;
for (i=0; i<RX_RING_SIZE; i++)
{
lp->rx_ring[i].buf_length = -ETH_FRAME_LEN;
lp->rx_ring[i].u.addr[3] |= 0x80;
}
/* Set 'Receive Mode' */
if (ec->flags & ECF_PROMISC)
{
write_csr(ioaddr, LANCE_CSR15, LANCE_CSR15_PROM);
}
else
{
if (ec->flags & (ECF_BROAD | ECF_MULTI))
{
write_csr(ioaddr, LANCE_CSR15, 0x0000);
}
else
{
write_csr(ioaddr, LANCE_CSR15, LANCE_CSR15_DRCVBC);
}
}
/* start && enable interrupt */
write_csr(ioaddr, LANCE_CSR0,
LANCE_CSR0_IDON|LANCE_CSR0_IENA|LANCE_CSR0_STRT);
return;
}
/*===========================================================================*
* ec_check_ints *
*===========================================================================*/
static void ec_check_ints(ec)
ether_card_t *ec;
{
int must_restart = 0;
int check,status;
int isr = 0x0000;
unsigned short ioaddr = ec->ec_port;
if (!(ec->flags & ECF_ENABLED))
panic("got premature interrupt");
for (;;)
{
#if VERBOSE
printf("ETH: Reading ISR...");
#endif
isr = read_csr(ioaddr, LANCE_CSR0);
if (isr & (LANCE_CSR0_ERR|LANCE_CSR0_RINT|LANCE_CSR0_TINT)) {
write_csr(ioaddr, LANCE_CSR0,
isr & ~(LANCE_CSR0_IENA|LANCE_CSR0_TDMD|LANCE_CSR0_STOP
|LANCE_CSR0_STRT|LANCE_CSR0_INIT) );
}
write_csr(ioaddr, LANCE_CSR0,
LANCE_CSR0_BABL|LANCE_CSR0_CERR|LANCE_CSR0_MISS|LANCE_CSR0_MERR
|LANCE_CSR0_IDON|LANCE_CSR0_IENA);
#define ISR_RST 0x0000
if ((isr & (LANCE_CSR0_TINT|LANCE_CSR0_RINT|LANCE_CSR0_MISS
|LANCE_CSR0_BABL|LANCE_CSR0_ERR)) == 0x0000)
{
#if VERBOSE
printf("OK\n");
#endif
break;
}
if (isr & LANCE_CSR0_MISS)
{
#if VERBOSE
printf("RX Missed Frame\n");
#endif
ec->eth_stat.ets_recvErr++;
}
if ((isr & LANCE_CSR0_BABL) || (isr & LANCE_CSR0_TINT))
{
if (isr & LANCE_CSR0_BABL)
{
#if VERBOSE
printf("TX Timeout\n");
#endif
ec->eth_stat.ets_sendErr++;
}
if (isr & LANCE_CSR0_TINT)
{
#if VERBOSE
printf("TX INT\n");
#endif
/* status check: restart if needed. */
status = lp->tx_ring[cur_tx_slot_nr].u.base;
/* ??? */
if (status & 0x40000000)
{
status = lp->tx_ring[cur_tx_slot_nr].misc;
ec->eth_stat.ets_sendErr++;
if (status & 0x0400)
ec->eth_stat.ets_transAb++;
if (status & 0x0800)
ec->eth_stat.ets_carrSense++;
if (status & 0x1000)
ec->eth_stat.ets_OWC++;
if (status & 0x4000)
{
ec->eth_stat.ets_fifoUnder++;
must_restart=1;
}
}
else
{
if (status & 0x18000000)
ec->eth_stat.ets_collision++;
ec->eth_stat.ets_packetT++;
}
}
/* transmit a packet on the next slot if it exists. */
check = 0;
if (isstored[cur_tx_slot_nr]==1)
{
/* free the tx-slot just transmitted */
isstored[cur_tx_slot_nr]=0;
cur_tx_slot_nr = (cur_tx_slot_nr + 1) & TX_RING_MOD_MASK;
/* next tx-slot is ready? */
if (isstored[cur_tx_slot_nr]==1)
check=1;
else
check=0;
}
else
{
panic("got premature TX INT..");
}
if (check==1)
{
lp->tx_ring[cur_tx_slot_nr].u.addr[3] = 0x83;
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_IENA|LANCE_CSR0_TDMD);
}
/* we set a buffered message in the slot if it exists. */
/* and transmit it, if needed. */
if (ec->flags & ECF_SEND_AVAIL)
ec_send(ec);
}
if (isr & LANCE_CSR0_RINT)
{
#if VERBOSE
printf("RX INT\n");
#endif
ec_recv(ec);
}
if (isr & ISR_RST)
{
ec->flags = ECF_STOPPED;
#if VERBOSE
printf("ISR_RST\n");
#endif
break;
}
/* ??? cf. lance driver on linux */
if (must_restart == 1)
{
#if VERBOSE
printf("ETH: restarting...\n");
#endif
/* stop */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STOP);
/* start */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STRT);
}
}
if ((ec->flags & (ECF_READING|ECF_STOPPED)) == (ECF_READING|ECF_STOPPED))
{
#if VERBOSE
printf("ETH: resetting...\n");
#endif
ec_reset(ec);
}
}
/*===========================================================================*
* ec_reset *
*===========================================================================*/
static void ec_reset(ec)
ether_card_t *ec;
{
/* Stop/start the chip, and clear all RX,TX-slots */
unsigned short ioaddr = ec->ec_port;
int i;
/* stop */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STOP);
/* start */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STRT);
/* purge Tx-ring */
tx_slot_nr = cur_tx_slot_nr = 0;
for (i=0; i<TX_RING_SIZE; i++)
{
lp->tx_ring[i].u.base = 0;
isstored[i]=0;
}
/* re-init Rx-ring */
rx_slot_nr = 0;
for (i=0; i<RX_RING_SIZE; i++)
{
lp->rx_ring[i].buf_length = -ETH_FRAME_LEN;
lp->rx_ring[i].u.addr[3] |= 0x80;
}
/* store a buffered message on the slot if exists */
ec_send(ec);
ec->flags &= ~ECF_STOPPED;
}
/*===========================================================================*
* ec_send *
*===========================================================================*/
static void ec_send(ec)
ether_card_t *ec;
{
/* from ec_check_ints() or ec_reset(). */
/* this function proccesses the buffered message. (slot/transmit) */
if (!(ec->flags & ECF_SEND_AVAIL))
return;
ec->flags &= ~ECF_SEND_AVAIL;
switch(ec->sendmsg.m_type)
{
case DL_WRITEV_S: do_vwrite_s(&ec->sendmsg, TRUE); break;
default:
panic("wrong type: %d", ec->sendmsg.m_type);
break;
}
}
/*===========================================================================*
* do_vread_s *
*===========================================================================*/
static void do_vread_s(const message *mp)
{
int count, r;
ether_card_t *ec;
ec= &ec_state;
ec->client= mp->m_source;
count = mp->DL_COUNT;
r = sys_safecopyfrom(mp->m_source, mp->DL_GRANT, 0,
(vir_bytes)ec->read_iovec.iod_iovec,
(count > IOVEC_NR ? IOVEC_NR : count) *
sizeof(iovec_s_t));
if (r != OK)
panic("do_vread_s: sys_safecopyfrom failed: %d", r);
ec->read_iovec.iod_iovec_s = count;
ec->read_iovec.iod_proc_nr = mp->m_source;
ec->read_iovec.iod_grant = (cp_grant_id_t) mp->DL_GRANT;
ec->read_iovec.iod_iovec_offset = 0;
ec->tmp_iovec = ec->read_iovec;
ec->flags |= ECF_READING;
ec_recv(ec);
if ((ec->flags & (ECF_READING|ECF_STOPPED)) == (ECF_READING|ECF_STOPPED))
ec_reset(ec);
reply(ec);
}
/*===========================================================================*
* ec_recv *
*===========================================================================*/
static void ec_recv(ec)
ether_card_t *ec;
{
vir_bytes length;
int packet_processed;
int status;
unsigned short ioaddr = ec->ec_port;
if ((ec->flags & ECF_READING)==0)
return;
if (!(ec->flags & ECF_ENABLED))
return;
/* we check all the received slots until find a properly received packet */
packet_processed = FALSE;
while (!packet_processed)
{
status = lp->rx_ring[rx_slot_nr].u.base >> 24;
if ( (status & 0x80) == 0x00 )
{
status = lp->rx_ring[rx_slot_nr].u.base >> 24;
/* ??? */
if (status != 0x03)
{
if (status & 0x01)
ec->eth_stat.ets_recvErr++;
if (status & 0x04)
ec->eth_stat.ets_fifoOver++;
if (status & 0x08)
ec->eth_stat.ets_CRCerr++;
if (status & 0x10)
ec->eth_stat.ets_OVW++;
if (status & 0x20)
ec->eth_stat.ets_frameAll++;
length = 0;
}
else
{
ec->eth_stat.ets_packetR++;
length = lp->rx_ring[rx_slot_nr].msg_length;
}
if (length > 0)
{
ec_nic2user(ec, (int)(lp->rbuf[rx_slot_nr]),
&ec->read_iovec, 0, length);
ec->read_s = length;
ec->flags |= ECF_PACK_RECV;
ec->flags &= ~ECF_READING;
packet_processed = TRUE;
}
/* set up this slot again, and we move to the next slot */
lp->rx_ring[rx_slot_nr].buf_length = -ETH_FRAME_LEN;
lp->rx_ring[rx_slot_nr].u.addr[3] |= 0x80;
write_csr(ioaddr, LANCE_CSR0,
LANCE_CSR0_BABL|LANCE_CSR0_CERR|LANCE_CSR0_MISS
|LANCE_CSR0_MERR|LANCE_CSR0_IDON|LANCE_CSR0_IENA);
rx_slot_nr = (rx_slot_nr + 1) & RX_RING_MOD_MASK;
}
else
break;
}
}
/*===========================================================================*
* do_vwrite_s *
*===========================================================================*/
static void do_vwrite_s(mp, from_int)
message *mp;
int from_int;
{
int count, check, r;
ether_card_t *ec;
unsigned short ioaddr;
ec = &ec_state;
ec->client= mp->m_source;
count = mp->DL_COUNT;
if (isstored[tx_slot_nr]==1)
{
/* all slots are used, so this message is buffered */
ec->sendmsg= *mp;
ec->flags |= ECF_SEND_AVAIL;
reply(ec);
return;
}
/* convert the message to write_iovec */
r = sys_safecopyfrom(mp->m_source, mp->DL_GRANT, 0,
(vir_bytes)ec->write_iovec.iod_iovec,
(count > IOVEC_NR ? IOVEC_NR : count) *
sizeof(iovec_s_t));
if (r != OK)
panic("do_vwrite_s: sys_safecopyfrom failed: %d", r);
ec->write_iovec.iod_iovec_s = count;
ec->write_iovec.iod_proc_nr = mp->m_source;
ec->write_iovec.iod_grant = mp->DL_GRANT;
ec->write_iovec.iod_iovec_offset = 0;
ec->tmp_iovec = ec->write_iovec;
ec->write_s = calc_iovec_size(&ec->tmp_iovec);
/* copy write_iovec to the slot on DMA address */
ec_user2nic(ec, &ec->write_iovec, 0,
(int)(lp->tbuf[tx_slot_nr]), ec->write_s);
/* set-up for transmitting, and transmit it if needed. */
lp->tx_ring[tx_slot_nr].buf_length = -ec->write_s;
lp->tx_ring[tx_slot_nr].misc = 0x0;
lp->tx_ring[tx_slot_nr].u.base
= virt_to_bus(lp->tbuf[tx_slot_nr]) & 0xffffff;
isstored[tx_slot_nr]=1;
if (cur_tx_slot_nr == tx_slot_nr)
check=1;
else
check=0;
tx_slot_nr = (tx_slot_nr + 1) & TX_RING_MOD_MASK;
if (check == 1)
{
ioaddr = ec->ec_port;
lp->tx_ring[cur_tx_slot_nr].u.addr[3] = 0x83;
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_IENA|LANCE_CSR0_TDMD);
}
ec->flags |= ECF_PACK_SEND;
/* reply by calling do_int() if this function is called from interrupt. */
if (from_int)
return;
reply(ec);
}
/*===========================================================================*
* ec_user2nic *
*===========================================================================*/
static void ec_user2nic(ec, iovp, offset, nic_addr, count)
ether_card_t *ec;
iovec_dat_t *iovp;
vir_bytes offset;
int nic_addr;
vir_bytes count;
{
int bytes, i, r;
i= 0;
while (count > 0)
{
if (i >= IOVEC_NR)
{
ec_next_iovec(iovp);
i= 0;
continue;
}
if (offset >= iovp->iod_iovec[i].iov_size)
{
offset -= iovp->iod_iovec[i].iov_size;
i++;
continue;
}
bytes = iovp->iod_iovec[i].iov_size - offset;
if (bytes > count)
bytes = count;
if ( (r=sys_safecopyfrom(iovp->iod_proc_nr,
iovp->iod_iovec[i].iov_grant, offset,
nic_addr, bytes )) != OK )
panic("ec_user2nic: sys_safecopyfrom failed: %d", r);
count -= bytes;
nic_addr += bytes;
offset += bytes;
}
}
/*===========================================================================*
* ec_nic2user *
*===========================================================================*/
static void ec_nic2user(ec, nic_addr, iovp, offset, count)
ether_card_t *ec;
int nic_addr;
iovec_dat_t *iovp;
vir_bytes offset;
vir_bytes count;
{
int bytes, i, r;
i= 0;
while (count > 0)
{
if (i >= IOVEC_NR)
{
ec_next_iovec(iovp);
i= 0;
continue;
}
if (offset >= iovp->iod_iovec[i].iov_size)
{
offset -= iovp->iod_iovec[i].iov_size;
i++;
continue;
}
bytes = iovp->iod_iovec[i].iov_size - offset;
if (bytes > count)
bytes = count;
if ( (r=sys_safecopyto( iovp->iod_proc_nr, iovp->iod_iovec[i].iov_grant,
offset, nic_addr, bytes )) != OK )
panic("ec_nic2user: sys_safecopyto failed: %d", r);
count -= bytes;
nic_addr += bytes;
offset += bytes;
}
}
/*===========================================================================*
* calc_iovec_size *
*===========================================================================*/
static int calc_iovec_size(iovec_dat_t *iovp)
{
int size,i;
size = i = 0;
while (i < iovp->iod_iovec_s)
{
if (i >= IOVEC_NR)
{
ec_next_iovec(iovp);
i= 0;
continue;
}
size += iovp->iod_iovec[i].iov_size;
i++;
}
return size;
}
/*===========================================================================*
* ec_next_iovec *
*===========================================================================*/
static void ec_next_iovec(iovp)
iovec_dat_t *iovp;
{
int r;
iovp->iod_iovec_s -= IOVEC_NR;
iovp->iod_iovec_offset += IOVEC_NR * sizeof(iovec_s_t);
r = sys_safecopyfrom(iovp->iod_proc_nr, iovp->iod_grant,
iovp->iod_iovec_offset,
(vir_bytes)iovp->iod_iovec,
(iovp->iod_iovec_s > IOVEC_NR ?
IOVEC_NR : iovp->iod_iovec_s) *
sizeof(iovec_s_t));
if (r != OK)
panic("ec_next_iovec: sys_safecopyfrom failed: %d", r);
}
/*===========================================================================*
* do_getstat_s *
*===========================================================================*/
static void do_getstat_s(mp)
message *mp;
{
int r;
ether_card_t *ec;
ec= &ec_state;
r = sys_safecopyto(mp->m_source, mp->DL_GRANT, 0,
(vir_bytes)&ec->eth_stat, sizeof(ec->eth_stat));
if (r != OK)
panic("do_getstat_s: sys_safecopyto failed: %d", r);
mp->m_type= DL_STAT_REPLY;
r= ipc_send(mp->m_source, mp);
if (r != OK)
panic("do_getstat_s: send failed: %d", r);
}
/*===========================================================================*
* lance_stop *
*===========================================================================*/
static void lance_stop(ec)
ether_card_t *ec;
{
unsigned short ioaddr;
if (!(ec->flags & ECF_ENABLED))
return;
ioaddr = ec->ec_port;
/* stop */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STOP);
/* Reset */
in_word(ioaddr+LANCE_RESET);
ec->flags = ECF_EMPTY;
}
/*===========================================================================*
* getAddressing *
*===========================================================================*/
static void getAddressing(devind, ec)
int devind;
ether_card_t *ec;
{
unsigned int membase, ioaddr;
int reg, irq;
for (reg = PCI_BAR; reg <= PCI_BAR_6; reg += 4)
{
ioaddr = pci_attr_r32(devind, reg);
if ((ioaddr & PCI_BAR_IO_MASK) == 0 || (ioaddr & PCI_BAR_IO) == 0)
continue;
/* Strip the I/O address out of the returned value */
ioaddr &= PCI_BAR_IO_MASK;
/* Get the memory base address */
membase = pci_attr_r32(devind, PCI_BAR_2);
/* KK: Get the IRQ number */
irq = pci_attr_r8(devind, PCI_IPR);
if (irq)
irq = pci_attr_r8(devind, PCI_ILR);
ec->ec_linmem = membase;
ec->ec_port = ioaddr;
ec->ec_irq = irq;
}
}
/*===========================================================================*
* lance_probe *
*===========================================================================*/
static int lance_probe(ec, skip)
ether_card_t *ec;
int skip;
{
unsigned short pci_cmd;
unsigned short ioaddr;
int lance_version, chip_version;
int devind, r;
u16_t vid, did;
r= pci_first_dev(&devind, &vid, &did);
if (r == 0)
return 0;
while (skip--)
{
r= pci_next_dev(&devind, &vid, &did);
if (!r)
return 0;
}
pci_reserve(devind);
getAddressing(devind, ec);
/* ===== Bus Master ? ===== */
pci_cmd = pci_attr_r32(devind, PCI_CR);
if (!(pci_cmd & PCI_CR_MAST_EN)) {
pci_cmd |= PCI_CR_MAST_EN;
pci_attr_w32(devind, PCI_CR, pci_cmd);
}
/* ===== Probe Details ===== */
ioaddr = ec->ec_port;
/* Reset */
in_word(ioaddr+LANCE_RESET);
if (read_csr(ioaddr, LANCE_CSR0) != LANCE_CSR0_STOP)
{
ec->mode=EC_DISABLED;
}
/* Probe Chip Version */
out_word(ioaddr+LANCE_ADDR, 88); /* Get the version of the chip */
if (in_word(ioaddr+LANCE_ADDR) != 88)
lance_version = 0;
else
{
chip_version = read_csr(ioaddr, LANCE_CSR88);
chip_version |= read_csr(ioaddr, LANCE_CSR89) << 16;
if ((chip_version & 0xfff) != 0x3)
{
ec->mode=EC_DISABLED;
}
chip_version = (chip_version >> 12) & 0xffff;
for (lance_version = 1; chip_table[lance_version].id_number != 0;
++lance_version)
if (chip_table[lance_version].id_number == chip_version)
break;
}
#if VERBOSE
printf("%s: %s at %X:%d\n",
ec->port_name, chip_table[lance_version].name,
ec->ec_port, ec->ec_irq);
#endif
return lance_version;
}
/*===========================================================================*
* lance_init_card *
*===========================================================================*/
static void lance_init_card(ec)
ether_card_t *ec;
{
int i;
Address l = (vir_bytes)lance_buf;
unsigned short ioaddr = ec->ec_port;
/* ============= setup init_block(cf. lance_probe1) ================ */
/* make sure data structure is 8-byte aligned and below 16MB (for DMA) */
lp = (struct lance_interface *)l;
/* disable Tx and Rx */
lp->init_block.mode = LANCE_CSR15_DTX|LANCE_CSR15_DRX;
lp->init_block.filter[0] = lp->init_block.filter[1] = 0x0;
/* using multiple Rx/Tx buffer */
lp->init_block.rx_ring
= (virt_to_bus(&lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
lp->init_block.tx_ring
= (virt_to_bus(&lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
l = virt_to_bus(&lp->init_block);
write_csr(ioaddr, LANCE_CSR1, (unsigned short)l);
write_csr(ioaddr, LANCE_CSR2, (unsigned short)(l >> 16));
write_csr(ioaddr, LANCE_CSR4,
LANCE_CSR4_APAD_XMT|LANCE_CSR4_MFCOM|LANCE_CSR4_RCVCCOM
|LANCE_CSR4_TXSTRTM|LANCE_CSR4_JABM);
/* ============= Get MAC address (cf. lance_probe1) ================ */
for (i = 0; i < 6; ++i)
ec->mac_address.ea_addr[i]=in_byte(ioaddr+LANCE_ETH_ADDR+i);
/* ============ (re)start init_block(cf. lance_reset) =============== */
/* Reset the LANCE */
(void)in_word(ioaddr+LANCE_RESET);
/* ----- Re-initialize the LANCE ----- */
/* Set station address */
for (i = 0; i < 6; ++i)
lp->init_block.phys_addr[i] = ec->mac_address.ea_addr[i];
/* Preset the receive ring headers */
for (i=0; i<RX_RING_SIZE; i++)
{
lp->rx_ring[i].buf_length = -ETH_FRAME_LEN;
/* OWN */
lp->rx_ring[i].u.base = virt_to_bus(lp->rbuf[i]) & 0xffffff;
/* we set the top byte as the very last thing */
lp->rx_ring[i].u.addr[3] = 0x80;
}
/* Preset the transmitting ring headers */
for (i=0; i<TX_RING_SIZE; i++)
{
lp->tx_ring[i].u.base = 0;
isstored[i] = 0;
}
/* enable Rx and Tx */
lp->init_block.mode = 0x0;
l = (Address)virt_to_bus(&lp->init_block);
write_csr(ioaddr, LANCE_CSR1, (short)l);
write_csr(ioaddr, LANCE_CSR2, (short)(l >> 16));
write_csr(ioaddr, LANCE_CSR4,
LANCE_CSR4_APAD_XMT|LANCE_CSR4_MFCOM|LANCE_CSR4_RCVCCOM
|LANCE_CSR4_TXSTRTM|LANCE_CSR4_JABM);
/* ----- start when init done. ----- */
/* stop */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_STOP);
/* init */
write_csr(ioaddr, LANCE_CSR0, LANCE_CSR0_INIT);
/* poll for IDON */
for (i = 10000; i > 0; --i)
if (read_csr(ioaddr, LANCE_CSR0) & LANCE_CSR0_IDON)
break;
/* Set 'Multicast Table' */
for (i=0;i<4;++i)
{
write_csr(ioaddr, LANCE_CSR8 + i, 0xffff);
}
/* Set 'Receive Mode' */
if (ec->flags & ECF_PROMISC)
{
write_csr(ioaddr, LANCE_CSR15, LANCE_CSR15_PROM);
}
else
{
if (ec->flags & (ECF_BROAD | ECF_MULTI))
{
write_csr(ioaddr, LANCE_CSR15, 0x0000);
}
else
{
write_csr(ioaddr, LANCE_CSR15, LANCE_CSR15_DRCVBC);
}
}
/* start && enable interrupt */
write_csr(ioaddr, LANCE_CSR0,
LANCE_CSR0_IDON|LANCE_CSR0_IENA|LANCE_CSR0_STRT);
return;
}
/*===========================================================================*
* in_byte *
*===========================================================================*/
static u8_t in_byte(port_t port)
{
int r;
u32_t value;
r= sys_inb(port, &value);
if (r != OK)
panic("sys_inb failed: %d", r);
return value;
}
/*===========================================================================*
* in_word *
*===========================================================================*/
static u16_t in_word(port_t port)
{
int r;
u32_t value;
r= sys_inw(port, &value);
if (r != OK)
panic("sys_inw failed: %d", r);
return value;
}
/*===========================================================================*
* out_word *
*===========================================================================*/
static void out_word(port_t port, u16_t value)
{
int r;
r= sys_outw(port, value);
if (r != OK)
panic("sys_outw failed: %d", r);
}
/*===========================================================================*
* read_csr *
*===========================================================================*/
static u16_t read_csr(port_t ioaddr, u16_t csrno)
{
out_word(ioaddr+LANCE_ADDR, csrno);
return in_word(ioaddr+LANCE_DATA);
}
/*===========================================================================*
* write_csr *
*===========================================================================*/
static void write_csr(port_t ioaddr, u16_t csrno, u16_t value)
{
out_word(ioaddr+LANCE_ADDR, csrno);
out_word(ioaddr+LANCE_DATA, value);
}
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