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phunix/drivers/dpeth/8390.c
Ben Gras becc8c1a6b Giovanni's fixes to dpeth: 
Date: Sat, 03 Sep 2005 11:05:22 +0200
Subject: Minix 3.0.8
2005-09-04 18:52:16 +00:00

738 lines
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/*
** File: 8390.c May 02, 2000
**
** Author: Giovanni Falzoni <gfalzoni@inwind.it>
**
** This file contains an ethernet device driver for NICs
** equipped with the National Semiconductor NS 8390 chip.
** It has to be associated with the board specific driver.
** Rewritten from Minix 2.0.0 ethernet driver dp8390.c
** to extract the NS 8390 common functions.
**
** $Id$
*/
#include "drivers.h"
#include <minix/com.h>
#include <net/hton.h>
#include <net/gen/ether.h>
#include <net/gen/eth_io.h>
#include "dp.h"
#if (ENABLE_DP8390 == 1)
#define PIO16 0 /* NOTE: pio 16 functions missing */
#include "8390.h"
#define sys_nic2mem(srcOffs,dstProc,dstOffs,length) \
sys_vircopy(SELF,dep->de_memsegm,(vir_bytes)(srcOffs),\
(dstProc),D,(vir_bytes)(dstOffs),length)
#define sys_user2nic(srcProc,srcOffs,dstOffs,length) \
sys_vircopy((srcProc),D,(vir_bytes)(srcOffs),\
SELF,dep->de_memsegm,(vir_bytes)(dstOffs),length)
static const char RdmaErrMsg[] = "remote dma failed to complete";
/*
** Name: void ns_rw_setup(dpeth_t *dep, int mode, int size, u16_t offset);
** Function: Sets the board for reading/writing.
*/
static void ns_rw_setup(dpeth_t *dep, int mode, int size, u16_t offset)
{
if (mode == CR_DM_RW) outb_reg0(dep, DP_ISR, ISR_RDC);
outb_reg0(dep, DP_RBCR0, size & 0xFF);
outb_reg0(dep, DP_RBCR1, (size >> 8) & 0xFF);
outb_reg0(dep, DP_RSAR0, offset & 0xFF);
outb_reg0(dep, DP_RSAR1, (offset >> 8) & 0xFF);
mode |= (CR_PS_P0 | CR_STA);
outb_reg0(dep, DP_CR, mode);
return;
}
/*
** Name: void ns_start_xmit(dpeth_t *dep, int size, int pageno);
** Function: Sets the board for for transmitting and fires it.
*/
static void ns_start_xmit(dpeth_t * dep, int size, int pageno)
{
outb_reg0(dep, DP_TPSR, pageno);
outb_reg0(dep, DP_TBCR1, size >> 8);
outb_reg0(dep, DP_TBCR0, size & 0xFF);
outb_reg0(dep, DP_CR, CR_NO_DMA | CR_STA | CR_TXP); /* Fires transmission */
return;
}
/*
** Name: void mem_getblock(dpeth_t *dep, u16_t offset,
** int size, void *dst)
** Function: Reads a block of packet from board (shared memory).
*/
static void mem_getblock(dpeth_t *dep, u16_t offset, int size, void *dst)
{
sys_nic2mem(dep->de_linmem + offset, SELF, dst, size);
return;
}
/*
** Name: void mem_nic2user(dpeth_t *dep, int pageno, int pktsize);
** Function: Copies a packet from board to user area (shared memory).
*/
static void mem_nic2user(dpeth_t * dep, int pageno, int pktsize)
{
phys_bytes offset, phys_user;
iovec_dat_t *iovp = &dep->de_read_iovec;
int bytes, ix = 0;
/* Computes shared memory address (skipping receive header) */
offset = pageno * DP_PAGESIZE + sizeof(dp_rcvhdr_t);
do { /* Reads chuncks of packet into user area */
bytes = iovp->iod_iovec[ix].iov_size; /* Size of a chunck */
if (bytes > pktsize) bytes = pktsize;
/* Reads from board to user area */
if ((offset + bytes) > (dep->de_stoppage * DP_PAGESIZE)) {
/* Circular buffer wrap-around */
bytes = dep->de_stoppage * DP_PAGESIZE - offset;
sys_nic2mem(dep->de_linmem + offset, iovp->iod_proc_nr,
iovp->iod_iovec[ix].iov_addr, bytes);
pktsize -= bytes;
phys_user += bytes;
bytes = iovp->iod_iovec[ix].iov_size - bytes;
if (bytes > pktsize) bytes = pktsize;
offset = dep->de_startpage * DP_PAGESIZE;
}
sys_nic2mem(dep->de_linmem + offset, iovp->iod_proc_nr,
iovp->iod_iovec[ix].iov_addr, bytes);
offset += bytes;
if (++ix >= IOVEC_NR) { /* Next buffer of IO vector */
dp_next_iovec(iovp);
ix = 0;
}
/* Till packet done */
} while ((pktsize -= bytes) > 0);
return;
}
/*
** Name: void mem_user2nic(dpeth_t *dep, int pageno, int pktsize)
** Function: Copies a packet from user area to board (shared memory).
*/
static void mem_user2nic(dpeth_t *dep, int pageno, int pktsize)
{
phys_bytes offset, phys_user;
iovec_dat_t *iovp = &dep->de_write_iovec;
int bytes, ix = 0;
/* Computes shared memory address */
offset = pageno * DP_PAGESIZE;
do { /* Reads chuncks of packet from user area */
bytes = iovp->iod_iovec[ix].iov_size; /* Size of chunck */
if (bytes > pktsize) bytes = pktsize;
/* Reads from user area to board (shared memory) */
sys_user2nic(iovp->iod_proc_nr, iovp->iod_iovec[ix].iov_addr,
dep->de_linmem + offset, bytes);
offset += bytes;
if (++ix >= IOVEC_NR) { /* Next buffer of IO vector */
dp_next_iovec(iovp);
ix = 0;
}
/* Till packet done */
} while ((pktsize -= bytes) > 0);
return;
}
/*
** Name: void pio_getblock(dpeth_t *dep, u16_t offset,
** int size, void *dst)
** Function: Reads a block of packet from board (Prog. I/O).
*/
static void pio_getblock(dpeth_t *dep, u16_t offset, int size, void *dst)
{
/* Sets up board for reading */
ns_rw_setup(dep, CR_DM_RR, size, offset);
#if PIO16 == 0
insb(dep->de_data_port, SELF, dst, size);
#else
if (dep->de_16bit == TRUE) {
insw(dep->de_data_port, dst, size);
} else {
insb(dep->de_data_port, dst, size);
}
#endif
return;
}
/*
** Name: void pio_nic2user(dpeth_t *dep, int pageno, int pktsize)
** Function: Copies a packet from board to user area (Prog. I/O).
*/
static void pio_nic2user(dpeth_t *dep, int pageno, int pktsize)
{
phys_bytes phys_user;
iovec_dat_t *iovp = &dep->de_read_iovec;
unsigned offset; int bytes, ix = 0;
/* Computes memory address (skipping receive header) */
offset = pageno * DP_PAGESIZE + sizeof(dp_rcvhdr_t);
/* Sets up board for reading */
ns_rw_setup(dep, CR_DM_RR, ((offset + pktsize) > (dep->de_stoppage * DP_PAGESIZE)) ?
(dep->de_stoppage * DP_PAGESIZE) - offset : pktsize, offset);
do { /* Reads chuncks of packet into user area */
bytes = iovp->iod_iovec[ix].iov_size; /* Size of a chunck */
if (bytes > pktsize) bytes = pktsize;
if ((offset + bytes) > (dep->de_stoppage * DP_PAGESIZE)) {
/* Circular buffer wrap-around */
bytes = dep->de_stoppage * DP_PAGESIZE - offset;
insb(dep->de_data_port, iovp->iod_proc_nr, (void*)(iovp->iod_iovec[ix].iov_addr), bytes);
pktsize -= bytes;
iovp->iod_iovec[ix].iov_addr += bytes;
bytes = iovp->iod_iovec[ix].iov_size - bytes;
if (bytes > pktsize) bytes = pktsize;
offset = dep->de_startpage * DP_PAGESIZE;
ns_rw_setup(dep, CR_DM_RR, pktsize, offset);
}
insb(dep->de_data_port, iovp->iod_proc_nr, (void*)(iovp->iod_iovec[ix].iov_addr), bytes);
offset += bytes;
if (++ix >= IOVEC_NR) { /* Next buffer of IO vector */
dp_next_iovec(iovp);
ix = 0;
}
/* Till packet done */
} while ((pktsize -= bytes) > 0);
return;
}
/*
** Name: void pio_user2nic(dpeth_t *dep, int pageno, int pktsize)
** Function: Copies a packet from user area to board (Prog. I/O).
*/
static void pio_user2nic(dpeth_t *dep, int pageno, int pktsize)
{
phys_bytes phys_user;
iovec_dat_t *iovp = &dep->de_write_iovec;
int bytes, ix = 0;
/* Sets up board for writing */
ns_rw_setup(dep, CR_DM_RW, pktsize, pageno * DP_PAGESIZE);
do { /* Reads chuncks of packet from user area */
bytes = iovp->iod_iovec[ix].iov_size; /* Size of chunck */
if (bytes > pktsize) bytes = pktsize;
outsb(dep->de_data_port, iovp->iod_proc_nr,
(void*)(iovp->iod_iovec[ix].iov_addr), bytes);
if (++ix >= IOVEC_NR) { /* Next buffer of I/O vector */
dp_next_iovec(iovp);
ix = 0;
}
/* Till packet done */
} while ((pktsize -= bytes) > 0);
for (ix = 0; ix < 100; ix += 1) {
if (inb_reg0(dep, DP_ISR) & ISR_RDC) break;
}
if (ix == 100) {
panic(dep->de_name, RdmaErrMsg, NO_NUM);
}
return;
}
/*
** Name: void ns_stats(dpeth_t * dep)
** Function: Updates counters reading from device
*/
static void ns_stats(dpeth_t * dep)
{
dep->de_stat.ets_CRCerr += inb_reg0(dep, DP_CNTR0);
dep->de_stat.ets_recvErr += inb_reg0(dep, DP_CNTR1);
dep->de_stat.ets_fifoOver += inb_reg0(dep, DP_CNTR2);
return;
}
/*
** Name: void ns_dodump(dpeth_t * dep)
** Function: Displays statistics (a request from F5 key).
*/
static void ns_dodump(dpeth_t * dep)
{
ns_stats(dep); /* Forces reading fo counters from board */
return;
}
/*
** Name: void ns_reinit(dpeth_t *dep)
** Function: Updates receiver configuration.
*/
static void ns_reinit(dpeth_t * dep)
{
int dp_reg = 0;
if (dep->de_flags & DEF_PROMISC) dp_reg |= RCR_AB | RCR_PRO | RCR_AM;
if (dep->de_flags & DEF_BROAD) dp_reg |= RCR_AB;
if (dep->de_flags & DEF_MULTI) dp_reg |= RCR_AM;
outb_reg0(dep, DP_CR, CR_PS_P0);
outb_reg0(dep, DP_RCR, dp_reg);
return;
}
/*
** Name: void ns_send(dpeth_t * dep, int from_int, int size)
** Function: Transfers packet to device and starts sending.
*/
static void ns_send(dpeth_t * dep, int from_int, int size)
{
int queue;
if (queue = dep->de_sendq_head, dep->de_sendq[queue].sq_filled) {
if (from_int) panic(dep->de_name, "should not be sending ", NO_NUM);
dep->de_send_s = size;
return;
}
(dep->de_user2nicf) (dep, dep->de_sendq[queue].sq_sendpage, size);
dep->bytes_Tx += (long) size;
dep->de_sendq[queue].sq_filled = TRUE;
dep->de_flags |= (DEF_XMIT_BUSY | DEF_ACK_SEND);
if (dep->de_sendq_tail == queue) { /* there it goes.. */
ns_start_xmit(dep, size, dep->de_sendq[queue].sq_sendpage);
} else
dep->de_sendq[queue].sq_size = size;
if (++queue == dep->de_sendq_nr) queue = 0;
dep->de_sendq_head = queue;
dep->de_flags &= NOT(DEF_SENDING);
return;
}
/*
** Name: void ns_reset(dpeth_t *dep)
** Function: Resets device.
*/
static void ns_reset(dpeth_t * dep)
{
int ix;
/* Stop chip */
outb_reg0(dep, DP_CR, CR_STP | CR_NO_DMA);
outb_reg0(dep, DP_RBCR0, 0);
outb_reg0(dep, DP_RBCR1, 0);
for (ix = 0; ix < 0x1000 && ((inb_reg0(dep, DP_ISR) & ISR_RST) == 0); ix += 1)
/* Do nothing */ ;
outb_reg0(dep, DP_TCR, TCR_1EXTERNAL | TCR_OFST);
outb_reg0(dep, DP_CR, CR_STA | CR_NO_DMA);
outb_reg0(dep, DP_TCR, TCR_NORMAL | TCR_OFST);
/* Acknowledge the ISR_RDC (remote dma) interrupt. */
for (ix = 0; ix < 0x1000 && ((inb_reg0(dep, DP_ISR) & ISR_RDC) == 0); ix += 1)
/* Do nothing */ ;
outb_reg0(dep, DP_ISR, inb_reg0(dep, DP_ISR) & NOT(ISR_RDC));
/* Reset the transmit ring. If we were transmitting a packet, we
* pretend that the packet is processed. Higher layers will
* retransmit if the packet wasn't actually sent. */
dep->de_sendq_head = dep->de_sendq_tail = 0;
for (ix = 0; ix < dep->de_sendq_nr; ix++)
dep->de_sendq[ix].sq_filled = FALSE;
ns_send(dep, TRUE, dep->de_send_s);
return;
}
/*
** Name: void ns_recv(dpeth_t *dep, int fromint, int size)
** Function: Gets a packet from device
*/
static void ns_recv(dpeth_t *dep, int fromint, int size)
{
dp_rcvhdr_t header;
dp_rcvhdr_t dummy;
unsigned pageno, curr, next;
vir_bytes length;
int packet_processed = FALSE;
#ifdef ETH_IGN_PROTO
u16_t eth_type;
#endif
pageno = inb_reg0(dep, DP_BNRY) + 1;
if (pageno == dep->de_stoppage) pageno = dep->de_startpage;
do {
/* */
outb_reg0(dep, DP_CR, CR_PS_P1);
curr = inb_reg1(dep, DP_CURR);
outb_reg0(dep, DP_CR, CR_PS_P0 | CR_NO_DMA | CR_STA);
if (curr == pageno) break;
(dep->de_getblockf) (dep, pageno * DP_PAGESIZE, sizeof(header), &header);
#ifdef ETH_IGN_PROTO
(dep->de_getblockf) (dep, pageno * DP_PAGESIZE + sizeof(header) + 2 * sizeof(ether_addr_t), sizeof(eth_type), &eth_type);
#endif
length = (header.dr_rbcl | (header.dr_rbch << 8)) - sizeof(dp_rcvhdr_t);
next = header.dr_next;
if (length < ETH_MIN_PACK_SIZE || length > ETH_MAX_PACK_SIZE) {
printf("%s: packet with strange length arrived: %d\n", dep->de_name, length);
dep->de_stat.ets_recvErr += 1;
next = curr;
} else if (next < dep->de_startpage || next >= dep->de_stoppage) {
printf("%s: strange next page\n", dep->de_name);
dep->de_stat.ets_recvErr += 1;
next = curr;
#ifdef ETH_IGN_PROTO
} else if (eth_type == eth_ign_proto) {
/* Hack: ignore packets of a given protocol */
static int first = TRUE;
if (first) {
first = FALSE;
printf("%s: dropping proto %04x packet\n", dep->de_name, ntohs(eth_ign_proto));
}
next = curr;
#endif
} else if (header.dr_status & RSR_FO) {
/* This is very serious, issue a warning and reset buffers */
printf("%s: fifo overrun, resetting receive buffer\n", dep->de_name);
dep->de_stat.ets_fifoOver += 1;
next = curr;
} else if ((header.dr_status & RSR_PRX) && (dep->de_flags & DEF_ENABLED)) {
if (!(dep->de_flags & DEF_READING)) break;
(dep->de_nic2userf) (dep, pageno, length);
dep->de_read_s = length;
dep->de_flags |= DEF_ACK_RECV;
dep->de_flags &= NOT(DEF_READING);
packet_processed = TRUE;
}
dep->bytes_Rx += (long) length;
dep->de_stat.ets_packetR += 1;
outb_reg0(dep, DP_BNRY, (next == dep->de_startpage ? dep->de_stoppage : next) - 1);
pageno = next;
} while (!packet_processed);
#if 0
if ((dep->de_flags & (DEF_READING | DEF_STOPPED)) == (DEF_READING | DEF_STOPPED))
/* The chip is stopped, and all arrived packets delivered */
(*dep->de_resetf) (dep);
dep->de_flags &= NOT(DEF_STOPPED);
#endif
return;
}
/*
** Name: void ns_interrupt(dpeth_t * dep)
** Function: Handles interrupt.
*/
static void ns_interrupt(dpeth_t * dep)
{
int isr, tsr;
int size, queue;
while ((isr = inb_reg0(dep, DP_ISR)) != 0) {
outb_reg0(dep, DP_ISR, isr);
if (isr & (ISR_PTX | ISR_TXE)) {
tsr = inb_reg0(dep, DP_TSR);
if (tsr & TSR_PTX) {
dep->de_stat.ets_packetT++;
}
if (tsr & TSR_COL) dep->de_stat.ets_collision++;
if (tsr & (TSR_ABT | TSR_FU)) {
dep->de_stat.ets_fifoUnder++;
}
if ((isr & ISR_TXE) || (tsr & (TSR_CRS | TSR_CDH | TSR_OWC))) {
printf("%s: got send Error (0x%02X)\n", dep->de_name, tsr);
dep->de_stat.ets_sendErr++;
}
queue = dep->de_sendq_tail;
if (!(dep->de_sendq[queue].sq_filled)) { /* Hardware bug? */
printf("%s: transmit interrupt, but not sending\n", dep->de_name);
continue;
}
dep->de_sendq[queue].sq_filled = FALSE;
if (++queue == dep->de_sendq_nr) queue = 0;
dep->de_sendq_tail = queue;
if (dep->de_sendq[queue].sq_filled) {
ns_start_xmit(dep, dep->de_sendq[queue].sq_size,
dep->de_sendq[queue].sq_sendpage);
}
if (dep->de_flags & DEF_SENDING) {
ns_send(dep, TRUE, dep->de_send_s);
}
}
if (isr & ISR_PRX) {
ns_recv(dep, TRUE, 0);
}
if (isr & ISR_RXE) {
printf("%s: got recv Error (0x%04X)\n", dep->de_name, inb_reg0(dep, DP_RSR));
dep->de_stat.ets_recvErr++;
}
if (isr & ISR_CNT) {
dep->de_stat.ets_CRCerr += inb_reg0(dep, DP_CNTR0);
dep->de_stat.ets_recvErr += inb_reg0(dep, DP_CNTR1);
dep->de_stat.ets_fifoOver += inb_reg0(dep, DP_CNTR2);
}
if (isr & ISR_OVW) {
printf("%s: got overwrite warning\n", dep->de_name);
}
if (isr & ISR_RDC) {
/* Nothing to do */
}
if (isr & ISR_RST) {
/* This means we got an interrupt but the ethernet
* chip is shutdown. We set the flag DEF_STOPPED, and
* continue processing arrived packets. When the
* receive buffer is empty, we reset the dp8390. */
printf("%s: network interface stopped\n", dep->de_name);
dep->de_flags |= DEF_STOPPED;
break;
}
}
if ((dep->de_flags & (DEF_READING | DEF_STOPPED)) == (DEF_READING | DEF_STOPPED)) {
/* The chip is stopped, and all arrived packets delivered */
ns_reset(dep);
dep->de_flags &= NOT(DEF_STOPPED);
}
return;
}
/*
** Name: void ns_init(dpeth_t *dep)
** Function: Initializes the NS 8390
*/
void ns_init(dpeth_t * dep)
{
int dp_reg;
int ix;
/* NS8390 initialization (as recommended in National Semiconductor specs) */
outb_reg0(dep, DP_CR, CR_PS_P0 | CR_STP | CR_NO_DMA); /* 0x21 */
#if PIO16 == 0
outb_reg0(dep, DP_DCR, (DCR_BYTEWIDE | DCR_LTLENDIAN | DCR_8BYTES | DCR_BMS));
#else
outb_reg0(dep, DP_DCR, (((dep->de_16bit) ? DCR_WORDWIDE : DCR_BYTEWIDE) |
DCR_LTLENDIAN | DCR_8BYTES | DCR_BMS));
#endif
outb_reg0(dep, DP_RBCR0, 0);
outb_reg0(dep, DP_RBCR1, 0);
outb_reg0(dep, DP_RCR, RCR_MON); /* Sets Monitor mode */
outb_reg0(dep, DP_TCR, TCR_INTERNAL); /* Sets Loopback mode 1 */
outb_reg0(dep, DP_PSTART, dep->de_startpage);
outb_reg0(dep, DP_PSTOP, dep->de_stoppage);
outb_reg0(dep, DP_BNRY, dep->de_stoppage - 1);
outb_reg0(dep, DP_ISR, 0xFF); /* Clears Interrupt Status Register */
outb_reg0(dep, DP_IMR, 0); /* Clears Interrupt Mask Register */
/* Copies station address in page 1 registers */
outb_reg0(dep, DP_CR, CR_PS_P1 | CR_NO_DMA); /* Selects Page 1 */
for (ix = 0; ix < SA_ADDR_LEN; ix += 1) /* Initializes address */
outb_reg1(dep, DP_PAR0 + ix, dep->de_address.ea_addr[ix]);
for (ix = DP_MAR0; ix <= DP_MAR7; ix += 1) /* Initializes address */
outb_reg1(dep, ix, 0xFF);
outb_reg1(dep, DP_CURR, dep->de_startpage);
outb_reg1(dep, DP_CR, CR_PS_P0 | CR_NO_DMA); /* Selects Page 0 */
inb_reg0(dep, DP_CNTR0); /* Resets counters by reading them */
inb_reg0(dep, DP_CNTR1);
inb_reg0(dep, DP_CNTR2);
dp_reg = IMR_PRXE | IMR_PTXE | IMR_RXEE | IMR_TXEE | IMR_OVWE | IMR_CNTE;
outb_reg0(dep, DP_ISR, 0xFF); /* Clears Interrupt Status Register */
outb_reg0(dep, DP_IMR, dp_reg); /* Sets Interrupt Mask register */
dp_reg = 0;
if (dep->de_flags & DEF_PROMISC) dp_reg |= RCR_AB | RCR_PRO | RCR_AM;
if (dep->de_flags & DEF_BROAD) dp_reg |= RCR_AB;
if (dep->de_flags & DEF_MULTI) dp_reg |= RCR_AM;
outb_reg0(dep, DP_RCR, dp_reg); /* Sets receive as requested */
outb_reg0(dep, DP_TCR, TCR_NORMAL); /* Sets transmitter */
outb_reg0(dep, DP_CR, CR_STA | CR_NO_DMA); /* Starts board */
/* Initializes the send queue. */
for (ix = 0; ix < dep->de_sendq_nr; ix += 1)
dep->de_sendq[ix].sq_filled = 0;
dep->de_sendq_head = dep->de_sendq_tail = 0;
/* Device specific functions */
if (!dep->de_prog_IO) {
dep->de_user2nicf = mem_user2nic;
dep->de_nic2userf = mem_nic2user;
dep->de_getblockf = mem_getblock;
} else {
#if PIO16 == 0
dep->de_user2nicf = pio_user2nic;
dep->de_nic2userf = pio_nic2user;
dep->de_getblockf = pio_getblock;
#else
#error Missing I/O functions for pio 16 bits
#endif
}
dep->de_recvf = ns_recv;
dep->de_sendf = ns_send;
dep->de_flagsf = ns_reinit;
dep->de_resetf = ns_reset;
dep->de_getstatsf = ns_stats;
dep->de_dumpstatsf = ns_dodump;
dep->de_interruptf = ns_interrupt;
return; /* Done */
}
#if PIO16 == 1
/*
** Name: void dp_pio16_user2nic(dpeth_t *dep, int pageno, int pktsize)
** Function: Copies a packet from user area to board (Prog. I/O, 16bits).
*/
static void dp_pio16_user2nic(dpeth_t *dep, int pageno, int pktsize)
{
u8_t two_bytes[2];
phys_bytes phys_user, phys_2bytes = vir2phys(two_bytes);
vir_bytes ecount = (pktsize + 1) & NOT(0x0001);
int bytes, ix = 0, odd_byte = 0;
iovec_dat_t *iovp = &dep->de_write_iovec;
outb_reg0(dep, DP_ISR, ISR_RDC);
dp_read_setup(dep, ecount, pageno * DP_PAGESIZE);
do {
bytes = iovp->iod_iovec[ix].iov_size;
if (bytes > pktsize) bytes = pktsize;
phys_user = numap(iovp->iod_proc_nr, iovp->iod_iovec[ix].iov_addr, bytes);
if (!phys_user) panic(dep->de_name, UmapErrMsg, NO_NUM);
if (odd_byte) {
phys_copy(phys_user, phys_2bytes + 1, (phys_bytes) 1);
out_word(dep->de_data_port, *(u16_t *)two_bytes);
pktsize--;
bytes--;
phys_user++;
odd_byte = 0;
if (!bytes) continue;
}
ecount = bytes & NOT(0x0001);
if (ecount != 0) {
phys_outsw(dep->de_data_port, phys_user, ecount);
pktsize -= ecount;
bytes -= ecount;
phys_user += ecount;
}
if (bytes) {
phys_copy(phys_user, phys_2bytes, (phys_bytes) 1);
pktsize--;
bytes--;
phys_user++;
odd_byte = 1;
}
if (++ix >= IOVEC_NR) { /* Next buffer of I/O vector */
dp_next_iovec(iovp);
ix = 0;
}
} while (bytes > 0);
if (odd_byte) out_word(dep->de_data_port, *(u16_t *) two_bytes);
for (ix = 0; ix < 100; ix++) {
if (inb_reg0(dep, DP_ISR) & ISR_RDC) break;
}
if (ix == 100) {
panic(dep->de_name, RdmaErrMsg, NO_NUM);
}
return;
}
/*
** Name: void dp_pio16_nic2user(dpeth_t *dep, int pageno, int pktsize)
** Function: Copies a packet from board to user area (Prog. I/O, 16bits).
*/
static void dp_pio16_nic2user(dpeth_t * dep, int nic_addr, int count)
{
phys_bytes phys_user;
vir_bytes ecount;
int bytes, i;
u8_t two_bytes[2];
phys_bytes phys_2bytes;
int odd_byte;
ecount = (count + 1) & ~1;
phys_2bytes = vir2phys(two_bytes);
odd_byte = 0;
dp_read_setup(dep, ecount, nic_addr);
i = 0;
while (count > 0) {
if (i >= IOVEC_NR) {
dp_next_iovec(iovp);
i = 0;
continue;
}
bytes = iovp->iod_iovec[i].iov_size;
if (bytes > count) bytes = count;
phys_user = numap(iovp->iod_proc_nr,
iovp->iod_iovec[i].iov_addr, bytes);
if (!phys_user) panic(dep->de_name, UmapErrMsg, NO_NUM);
if (odd_byte) {
phys_copy(phys_2bytes + 1, phys_user, (phys_bytes) 1);
count--;
bytes--;
phys_user++;
odd_byte = 0;
if (!bytes) continue;
}
ecount = bytes & ~1;
if (ecount != 0) {
phys_insw(dep->de_data_port, phys_user, ecount);
count -= ecount;
bytes -= ecount;
phys_user += ecount;
}
if (bytes) {
*(u16_t *) two_bytes = in_word(dep->de_data_port);
phys_copy(phys_2bytes, phys_user, (phys_bytes) 1);
count--;
bytes--;
phys_user++;
odd_byte = 1;
}
}
return;
}
#endif /* PIO16 == 1 */
#endif /* ENABLE_DP8390 */
/** end 8390.c **/
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