declance.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:32k
- /*
- * Lance ethernet driver for the MIPS processor based
- * DECstation family
- *
- *
- * adopted from sunlance.c by Richard van den Berg
- *
- * Copyright (C) 2002 Maciej W. Rozycki
- *
- * additional sources:
- * - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
- * Revision 1.2
- *
- * History:
- *
- * v0.001: The kernel accepts the code and it shows the hardware address.
- *
- * v0.002: Removed most sparc stuff, left only some module and dma stuff.
- *
- * v0.003: Enhanced base address calculation from proposals by
- * Harald Koerfgen and Thomas Riemer.
- *
- * v0.004: lance-regs is pointing at the right addresses, added prom
- * check. First start of address mapping and DMA.
- *
- * v0.005: started to play around with LANCE-DMA. This driver will not
- * work for non IOASIC lances. HK
- *
- * v0.006: added pointer arrays to lance_private and setup routine for
- * them in dec_lance_init. HK
- *
- * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
- * access the init block. This looks like one (short) word at a
- * time, but the smallest amount the IOASIC can transfer is a
- * (long) word. So we have a 2-2 padding here. Changed
- * lance_init_block accordingly. The 16-16 padding for the buffers
- * seems to be correct. HK
- *
- * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
- *
- * v0.009: Module support fixes, multiple interfaces support, various
- * bits. macro
- */
- #include <linux/config.h>
- #include <linux/crc32.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/if_ether.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/stddef.h>
- #include <linux/string.h>
- #include <asm/addrspace.h>
- #include <asm/dec/interrupts.h>
- #include <asm/dec/ioasic.h>
- #include <asm/dec/ioasic_addrs.h>
- #include <asm/dec/kn01.h>
- #include <asm/dec/machtype.h>
- #include <asm/dec/tc.h>
- #include <asm/system.h>
- static char version[] __devinitdata =
- "declance.c: v0.009 by Linux MIPS DECstation task forcen";
- MODULE_AUTHOR("Linux MIPS DECstation task force");
- MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
- MODULE_LICENSE("GPL");
- /*
- * card types
- */
- #define ASIC_LANCE 1
- #define PMAD_LANCE 2
- #define PMAX_LANCE 3
- #ifndef CONFIG_TC
- unsigned long system_base;
- unsigned long dmaptr;
- #endif
- #define LE_CSR0 0
- #define LE_CSR1 1
- #define LE_CSR2 2
- #define LE_CSR3 3
- #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
- #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
- #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
- #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
- #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
- #define LE_C0_MERR 0x0800 /* ME: Memory error */
- #define LE_C0_RINT 0x0400 /* Received interrupt */
- #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
- #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
- #define LE_C0_INTR 0x0080 /* Interrupt or error */
- #define LE_C0_INEA 0x0040 /* Interrupt enable */
- #define LE_C0_RXON 0x0020 /* Receiver on */
- #define LE_C0_TXON 0x0010 /* Transmitter on */
- #define LE_C0_TDMD 0x0008 /* Transmitter demand */
- #define LE_C0_STOP 0x0004 /* Stop the card */
- #define LE_C0_STRT 0x0002 /* Start the card */
- #define LE_C0_INIT 0x0001 /* Init the card */
- #define LE_C3_BSWP 0x4 /* SWAP */
- #define LE_C3_ACON 0x2 /* ALE Control */
- #define LE_C3_BCON 0x1 /* Byte control */
- /* Receive message descriptor 1 */
- #define LE_R1_OWN 0x80 /* Who owns the entry */
- #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
- #define LE_R1_FRA 0x20 /* FRA: Frame error */
- #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
- #define LE_R1_CRC 0x08 /* CRC error */
- #define LE_R1_BUF 0x04 /* BUF: Buffer error */
- #define LE_R1_SOP 0x02 /* Start of packet */
- #define LE_R1_EOP 0x01 /* End of packet */
- #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
- #define LE_T1_OWN 0x80 /* Lance owns the packet */
- #define LE_T1_ERR 0x40 /* Error summary */
- #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
- #define LE_T1_EONE 0x08 /* Error: one retry needed */
- #define LE_T1_EDEF 0x04 /* Error: deferred */
- #define LE_T1_SOP 0x02 /* Start of packet */
- #define LE_T1_EOP 0x01 /* End of packet */
- #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
- #define LE_T3_BUF 0x8000 /* Buffer error */
- #define LE_T3_UFL 0x4000 /* Error underflow */
- #define LE_T3_LCOL 0x1000 /* Error late collision */
- #define LE_T3_CLOS 0x0800 /* Error carrier loss */
- #define LE_T3_RTY 0x0400 /* Error retry */
- #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
- /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
- #ifndef LANCE_LOG_TX_BUFFERS
- #define LANCE_LOG_TX_BUFFERS 4
- #define LANCE_LOG_RX_BUFFERS 4
- #endif
- #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
- #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
- #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
- #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
- #define PKT_BUF_SZ 1536
- #define RX_BUFF_SIZE PKT_BUF_SZ
- #define TX_BUFF_SIZE PKT_BUF_SZ
- #undef TEST_HITS
- #define ZERO 0
- /* The DS2000/3000 have a linear 64 KB buffer.
- * The PMAD-AA has 128 kb buffer on-board.
- *
- * The IOASIC LANCE devices use a shared memory region. This region as seen
- * from the CPU is (max) 128 KB long and has to be on an 128 KB boundary.
- * The LANCE sees this as a 64 KB long continuous memory region.
- *
- * The LANCE's DMA address is used as an index in this buffer and DMA takes
- * place in bursts of eight 16-Bit words which are packed into four 32-Bit words
- * by the IOASIC. This leads to a strange padding: 16 bytes of valid data followed
- * by a 16 byte gap :-(.
- */
- struct lance_rx_desc {
- unsigned short rmd0; /* low address of packet */
- short gap0;
- unsigned char rmd1_hadr; /* high address of packet */
- unsigned char rmd1_bits; /* descriptor bits */
- short gap1;
- short length; /* 2s complement (negative!)
- of buffer length */
- short gap2;
- unsigned short mblength; /* actual number of bytes received */
- short gap3;
- };
- struct lance_tx_desc {
- unsigned short tmd0; /* low address of packet */
- short gap0;
- unsigned char tmd1_hadr; /* high address of packet */
- unsigned char tmd1_bits; /* descriptor bits */
- short gap1;
- short length; /* 2s complement (negative!)
- of buffer length */
- short gap2;
- unsigned short misc;
- short gap3;
- };
- /* First part of the LANCE initialization block, described in databook. */
- struct lance_init_block {
- unsigned short mode; /* pre-set mode (reg. 15) */
- short gap0;
- unsigned char phys_addr[12]; /* physical ethernet address
- only 0, 1, 4, 5, 8, 9 are valid
- 2, 3, 6, 7, 10, 11 are gaps */
- unsigned short filter[8]; /* multicast filter
- only 0, 2, 4, 6 are valid
- 1, 3, 5, 7 are gaps */
- /* Receive and transmit ring base, along with extra bits. */
- unsigned short rx_ptr; /* receive descriptor addr */
- short gap1;
- unsigned short rx_len; /* receive len and high addr */
- short gap2;
- unsigned short tx_ptr; /* transmit descriptor addr */
- short gap3;
- unsigned short tx_len; /* transmit len and high addr */
- short gap4;
- short gap5[8];
- /* The buffer descriptors */
- struct lance_rx_desc brx_ring[RX_RING_SIZE];
- struct lance_tx_desc btx_ring[TX_RING_SIZE];
- };
- #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
- #define BUF_OFFSET_LNC (sizeof(struct lance_init_block)>>1)
- #define libdesc_offset(rt, elem)
- ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
- /*
- * This works *only* for the ring descriptors
- */
- #define LANCE_ADDR(x) (PHYSADDR(x) >> 1)
- struct lance_private {
- struct net_device *next;
- int type;
- int slot;
- int dma_irq;
- volatile struct lance_regs *ll;
- volatile struct lance_init_block *init_block;
- spinlock_t lock;
- int rx_new, tx_new;
- int rx_old, tx_old;
- struct net_device_stats stats;
- unsigned short busmaster_regval;
- struct timer_list multicast_timer;
- /* Pointers to the ring buffers as seen from the CPU */
- char *rx_buf_ptr_cpu[RX_RING_SIZE];
- char *tx_buf_ptr_cpu[TX_RING_SIZE];
- /* Pointers to the ring buffers as seen from the LANCE */
- char *rx_buf_ptr_lnc[RX_RING_SIZE];
- char *tx_buf_ptr_lnc[TX_RING_SIZE];
- };
- #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?
- lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:
- lp->tx_old - lp->tx_new-1)
- /* The lance control ports are at an absolute address, machine and tc-slot
- * dependant.
- * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
- * so we have to give the structure an extra member making rap pointing
- * at the right address
- */
- struct lance_regs {
- volatile unsigned short rdp; /* register data port */
- unsigned short pad;
- volatile unsigned short rap; /* register address port */
- };
- int dec_lance_debug = 2;
- static struct net_device *root_lance_dev;
- static inline void writereg(volatile unsigned short *regptr, short value)
- {
- *regptr = value;
- iob();
- }
- /* Load the CSR registers */
- static void load_csrs(struct lance_private *lp)
- {
- volatile struct lance_regs *ll = lp->ll;
- int leptr;
- /* The address space as seen from the LANCE
- * begins at address 0. HK
- */
- leptr = 0;
- writereg(&ll->rap, LE_CSR1);
- writereg(&ll->rdp, (leptr & 0xFFFF));
- writereg(&ll->rap, LE_CSR2);
- writereg(&ll->rdp, leptr >> 16);
- writereg(&ll->rap, LE_CSR3);
- writereg(&ll->rdp, lp->busmaster_regval);
- /* Point back to csr0 */
- writereg(&ll->rap, LE_CSR0);
- }
- /*
- * Our specialized copy routines
- *
- */
- void cp_to_buf(const int type, void *to, const void *from, int len)
- {
- unsigned short *tp, *fp, clen;
- unsigned char *rtp, *rfp;
- if (type == PMAX_LANCE) {
- clen = len >> 1;
- tp = (unsigned short *) to;
- fp = (unsigned short *) from;
- while (clen--) {
- *tp++ = *fp++;
- tp++;
- }
- clen = len & 1;
- rtp = (unsigned char *) tp;
- rfp = (unsigned char *) fp;
- while (clen--) {
- *rtp++ = *rfp++;
- }
- } else {
- /*
- * copy 16 Byte chunks
- */
- clen = len >> 4;
- tp = (unsigned short *) to;
- fp = (unsigned short *) from;
- while (clen--) {
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- tp += 8;
- }
- /*
- * do the rest, if any.
- */
- clen = len & 15;
- rtp = (unsigned char *) tp;
- rfp = (unsigned char *) fp;
- while (clen--) {
- *rtp++ = *rfp++;
- }
- }
- iob();
- }
- void cp_from_buf(const int type, void *to, const void *from, int len)
- {
- unsigned short *tp, *fp, clen;
- unsigned char *rtp, *rfp;
- if (type == PMAX_LANCE) {
- clen = len >> 1;
- tp = (unsigned short *) to;
- fp = (unsigned short *) from;
- while (clen--) {
- *tp++ = *fp++;
- fp++;
- }
- clen = len & 1;
- rtp = (unsigned char *) tp;
- rfp = (unsigned char *) fp;
- while (clen--) {
- *rtp++ = *rfp++;
- }
- } else {
- /*
- * copy 16 Byte chunks
- */
- clen = len >> 4;
- tp = (unsigned short *) to;
- fp = (unsigned short *) from;
- while (clen--) {
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- *tp++ = *fp++;
- fp += 8;
- }
- /*
- * do the rest, if any.
- */
- clen = len & 15;
- rtp = (unsigned char *) tp;
- rfp = (unsigned char *) fp;
- while (clen--) {
- *rtp++ = *rfp++;
- }
- }
- }
- /* Setup the Lance Rx and Tx rings */
- static void lance_init_ring(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_init_block *ib;
- int leptr;
- int i;
- ib = (struct lance_init_block *) (dev->mem_start);
- /* Lock out other processes while setting up hardware */
- netif_stop_queue(dev);
- lp->rx_new = lp->tx_new = 0;
- lp->rx_old = lp->tx_old = 0;
- /* Copy the ethernet address to the lance init block.
- * XXX bit 0 of the physical address registers has to be zero
- */
- ib->phys_addr[0] = dev->dev_addr[0];
- ib->phys_addr[1] = dev->dev_addr[1];
- ib->phys_addr[4] = dev->dev_addr[2];
- ib->phys_addr[5] = dev->dev_addr[3];
- ib->phys_addr[8] = dev->dev_addr[4];
- ib->phys_addr[9] = dev->dev_addr[5];
- /* Setup the initialization block */
- /* Setup rx descriptor pointer */
- leptr = LANCE_ADDR(libdesc_offset(brx_ring, 0));
- ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
- ib->rx_ptr = leptr;
- if (ZERO)
- printk("RX ptr: %8.8x(%8.8x)n", leptr, libdesc_offset(brx_ring, 0));
- /* Setup tx descriptor pointer */
- leptr = LANCE_ADDR(libdesc_offset(btx_ring, 0));
- ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
- ib->tx_ptr = leptr;
- if (ZERO)
- printk("TX ptr: %8.8x(%8.8x)n", leptr, libdesc_offset(btx_ring, 0));
- if (ZERO)
- printk("TX rings:n");
- /* Setup the Tx ring entries */
- for (i = 0; i < TX_RING_SIZE; i++) {
- leptr = (int) lp->tx_buf_ptr_lnc[i];
- ib->btx_ring[i].tmd0 = leptr;
- ib->btx_ring[i].tmd1_hadr = leptr >> 16;
- ib->btx_ring[i].tmd1_bits = 0;
- ib->btx_ring[i].length = 0xf000; /* The ones required by tmd2 */
- ib->btx_ring[i].misc = 0;
- if (i < 3 && ZERO)
- printk("%d: 0x%8.8x(0x%8.8x)n", i, leptr, (int) lp->tx_buf_ptr_cpu[i]);
- }
- /* Setup the Rx ring entries */
- if (ZERO)
- printk("RX rings:n");
- for (i = 0; i < RX_RING_SIZE; i++) {
- leptr = (int) lp->rx_buf_ptr_lnc[i];
- ib->brx_ring[i].rmd0 = leptr;
- ib->brx_ring[i].rmd1_hadr = leptr >> 16;
- ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
- ib->brx_ring[i].length = -RX_BUFF_SIZE | 0xf000;
- ib->brx_ring[i].mblength = 0;
- if (i < 3 && ZERO)
- printk("%d: 0x%8.8x(0x%8.8x)n", i, leptr, (int) lp->rx_buf_ptr_cpu[i]);
- }
- iob();
- }
- static int init_restart_lance(struct lance_private *lp)
- {
- volatile struct lance_regs *ll = lp->ll;
- int i;
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_INIT);
- /* Wait for the lance to complete initialization */
- for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
- udelay(10);
- }
- if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
- printk("LANCE unopened after %d ticks, csr0=%4.4x.n", i, ll->rdp);
- return -1;
- }
- if ((ll->rdp & LE_C0_ERR)) {
- printk("LANCE unopened after %d ticks, csr0=%4.4x.n", i, ll->rdp);
- return -1;
- }
- writereg(&ll->rdp, LE_C0_IDON);
- writereg(&ll->rdp, LE_C0_STRT);
- writereg(&ll->rdp, LE_C0_INEA);
- return 0;
- }
- static int lance_rx(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_init_block *ib;
- volatile struct lance_rx_desc *rd = 0;
- unsigned char bits;
- int len = 0;
- struct sk_buff *skb = 0;
- ib = (struct lance_init_block *) (dev->mem_start);
- #ifdef TEST_HITS
- {
- int i;
- printk("[");
- for (i = 0; i < RX_RING_SIZE; i++) {
- if (i == lp->rx_new)
- printk("%s", ib->brx_ring[i].rmd1_bits &
- LE_R1_OWN ? "_" : "X");
- else
- printk("%s", ib->brx_ring[i].rmd1_bits &
- LE_R1_OWN ? "." : "1");
- }
- printk("]");
- }
- #endif
- for (rd = &ib->brx_ring[lp->rx_new];
- !((bits = rd->rmd1_bits) & LE_R1_OWN);
- rd = &ib->brx_ring[lp->rx_new]) {
- /* We got an incomplete frame? */
- if ((bits & LE_R1_POK) != LE_R1_POK) {
- lp->stats.rx_over_errors++;
- lp->stats.rx_errors++;
- } else if (bits & LE_R1_ERR) {
- /* Count only the end frame as a rx error,
- * not the beginning
- */
- if (bits & LE_R1_BUF)
- lp->stats.rx_fifo_errors++;
- if (bits & LE_R1_CRC)
- lp->stats.rx_crc_errors++;
- if (bits & LE_R1_OFL)
- lp->stats.rx_over_errors++;
- if (bits & LE_R1_FRA)
- lp->stats.rx_frame_errors++;
- if (bits & LE_R1_EOP)
- lp->stats.rx_errors++;
- } else {
- len = (rd->mblength & 0xfff) - 4;
- skb = dev_alloc_skb(len + 2);
- if (skb == 0) {
- printk("%s: Memory squeeze, deferring packet.n",
- dev->name);
- lp->stats.rx_dropped++;
- rd->mblength = 0;
- rd->rmd1_bits = LE_R1_OWN;
- lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
- return 0;
- }
- lp->stats.rx_bytes += len;
- skb->dev = dev;
- skb_reserve(skb, 2); /* 16 byte align */
- skb_put(skb, len); /* make room */
- cp_from_buf(lp->type, skb->data,
- (char *)lp->rx_buf_ptr_cpu[lp->rx_new],
- len);
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- }
- /* Return the packet to the pool */
- rd->mblength = 0;
- rd->length = -RX_BUFF_SIZE | 0xf000;
- rd->rmd1_bits = LE_R1_OWN;
- lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
- }
- return 0;
- }
- static void lance_tx(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_init_block *ib;
- volatile struct lance_regs *ll = lp->ll;
- volatile struct lance_tx_desc *td;
- int i, j;
- int status;
- ib = (struct lance_init_block *) (dev->mem_start);
- j = lp->tx_old;
- spin_lock(&lp->lock);
- for (i = j; i != lp->tx_new; i = j) {
- td = &ib->btx_ring[i];
- /* If we hit a packet not owned by us, stop */
- if (td->tmd1_bits & LE_T1_OWN)
- break;
- if (td->tmd1_bits & LE_T1_ERR) {
- status = td->misc;
- lp->stats.tx_errors++;
- if (status & LE_T3_RTY)
- lp->stats.tx_aborted_errors++;
- if (status & LE_T3_LCOL)
- lp->stats.tx_window_errors++;
- if (status & LE_T3_CLOS) {
- lp->stats.tx_carrier_errors++;
- printk("%s: Carrier Lostn", dev->name);
- /* Stop the lance */
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- lance_init_ring(dev);
- load_csrs(lp);
- init_restart_lance(lp);
- goto out;
- }
- /* Buffer errors and underflows turn off the
- * transmitter, restart the adapter.
- */
- if (status & (LE_T3_BUF | LE_T3_UFL)) {
- lp->stats.tx_fifo_errors++;
- printk("%s: Tx: ERR_BUF|ERR_UFL, restartingn",
- dev->name);
- /* Stop the lance */
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- lance_init_ring(dev);
- load_csrs(lp);
- init_restart_lance(lp);
- goto out;
- }
- } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
- /*
- * So we don't count the packet more than once.
- */
- td->tmd1_bits &= ~(LE_T1_POK);
- /* One collision before packet was sent. */
- if (td->tmd1_bits & LE_T1_EONE)
- lp->stats.collisions++;
- /* More than one collision, be optimistic. */
- if (td->tmd1_bits & LE_T1_EMORE)
- lp->stats.collisions += 2;
- lp->stats.tx_packets++;
- }
- j = (j + 1) & TX_RING_MOD_MASK;
- }
- lp->tx_old = j;
- out:
- if (netif_queue_stopped(dev) &&
- TX_BUFFS_AVAIL > 0)
- netif_wake_queue(dev);
- spin_unlock(&lp->lock);
- }
- static void lance_dma_merr_int(const int irq, void *dev_id,
- struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- printk("%s: DMA errorn", dev->name);
- }
- static void lance_interrupt(const int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- int csr0;
- writereg(&ll->rap, LE_CSR0);
- csr0 = ll->rdp;
- /* Acknowledge all the interrupt sources ASAP */
- writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
- if ((csr0 & LE_C0_ERR)) {
- /* Clear the error condition */
- writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
- LE_C0_CERR | LE_C0_MERR);
- }
- if (csr0 & LE_C0_RINT)
- lance_rx(dev);
- if (csr0 & LE_C0_TINT)
- lance_tx(dev);
- if (csr0 & LE_C0_BABL)
- lp->stats.tx_errors++;
- if (csr0 & LE_C0_MISS)
- lp->stats.rx_errors++;
- if (csr0 & LE_C0_MERR) {
- printk("%s: Memory error, status %04xn", dev->name, csr0);
- writereg(&ll->rdp, LE_C0_STOP);
- lance_init_ring(dev);
- load_csrs(lp);
- init_restart_lance(lp);
- netif_wake_queue(dev);
- }
- writereg(&ll->rdp, LE_C0_INEA);
- writereg(&ll->rdp, LE_C0_INEA);
- }
- struct net_device *last_dev = 0;
- static int lance_open(struct net_device *dev)
- {
- volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- int status = 0;
- last_dev = dev;
- /* Stop the Lance */
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- /* Set mode and clear multicast filter only at device open,
- * so that lance_init_ring() called at any error will not
- * forget multicast filters.
- *
- * BTW it is common bug in all lance drivers! --ANK
- */
- ib->mode = 0;
- ib->filter [0] = 0;
- ib->filter [2] = 0;
- ib->filter [4] = 0;
- ib->filter [6] = 0;
- lance_init_ring(dev);
- load_csrs(lp);
- netif_start_queue(dev);
- /* Associate IRQ with lance_interrupt */
- if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) {
- printk("lance: Can't get IRQ %dn", dev->irq);
- return -EAGAIN;
- }
- if (lp->dma_irq >= 0) {
- if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0,
- "lance error", dev)) {
- free_irq(dev->irq, dev);
- printk("lance: Can't get DMA IRQ %dn", lp->dma_irq);
- return -EAGAIN;
- }
- /* Enable I/O ASIC LANCE DMA. */
- fast_wmb();
- ioasic_write(SSR, ioasic_read(SSR) | LANCE_DMA_EN);
- }
- status = init_restart_lance(lp);
- /*
- * if (!status)
- * MOD_INC_USE_COUNT;
- */
- return status;
- }
- static int lance_close(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- netif_stop_queue(dev);
- del_timer_sync(&lp->multicast_timer);
- /* Stop the card */
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- if (lp->dma_irq >= 0) {
- /* Disable I/O ASIC LANCE DMA. */
- ioasic_write(SSR, ioasic_read(SSR) & ~LANCE_DMA_EN);
- fast_iob();
- free_irq(lp->dma_irq, dev);
- }
- free_irq(dev->irq, dev);
- /*
- MOD_DEC_USE_COUNT;
- */
- return 0;
- }
- static inline int lance_reset(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- int status;
- /* Stop the lance */
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- lance_init_ring(dev);
- load_csrs(lp);
- dev->trans_start = jiffies;
- status = init_restart_lance(lp);
- return status;
- }
- static void lance_tx_timeout(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- printk(KERN_ERR "%s: transmit timed out, status %04x, resetn",
- dev->name, ll->rdp);
- lance_reset(dev);
- netif_wake_queue(dev);
- }
- static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_regs *ll = lp->ll;
- volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
- int entry, skblen, len;
- skblen = skb->len;
- len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
- lp->stats.tx_bytes += len;
- entry = lp->tx_new & TX_RING_MOD_MASK;
- ib->btx_ring[entry].length = (-len);
- ib->btx_ring[entry].misc = 0;
- cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data,
- skblen);
- /* Clear the slack of the packet, do I need this? */
- /* For a firewall its a good idea - AC */
- /*
- if (len != skblen)
- memset ((char *) &ib->tx_buf [entry][skblen], 0, (len - skblen) << 1);
- */
- /* Now, give the packet to the lance */
- ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
- lp->tx_new = (lp->tx_new + 1) & TX_RING_MOD_MASK;
- if (TX_BUFFS_AVAIL <= 0)
- netif_stop_queue(dev);
- /* Kick the lance: transmit now */
- writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
- spin_unlock_irq(&lp->lock);
- dev->trans_start = jiffies;
- dev_kfree_skb(skb);
- return 0;
- }
- static struct net_device_stats *lance_get_stats(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- return &lp->stats;
- }
- static void lance_load_multicast(struct net_device *dev)
- {
- volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
- volatile u16 *mcast_table = (u16 *) & ib->filter;
- struct dev_mc_list *dmi = dev->mc_list;
- char *addrs;
- int i, j, bit, byte;
- u32 crc;
- /* set all multicast bits */
- if (dev->flags & IFF_ALLMULTI) {
- ib->filter[0] = 0xffff;
- ib->filter[2] = 0xffff;
- ib->filter[4] = 0xffff;
- ib->filter[6] = 0xffff;
- return;
- }
- /* clear the multicast filter */
- ib->filter[0] = 0;
- ib->filter[2] = 0;
- ib->filter[4] = 0;
- ib->filter[6] = 0;
- /* Add addresses */
- for (i = 0; i < dev->mc_count; i++) {
- addrs = dmi->dmi_addr;
- dmi = dmi->next;
- /* multicast address? */
- if (!(*addrs & 1))
- continue;
- crc = ether_crc_le(ETH_ALEN, addrs);
- crc = crc >> 26;
- mcast_table[2 * (crc >> 4)] |= 1 << (crc & 0xf);
- }
- return;
- }
- static void lance_set_multicast(struct net_device *dev)
- {
- struct lance_private *lp = (struct lance_private *) dev->priv;
- volatile struct lance_init_block *ib;
- volatile struct lance_regs *ll = lp->ll;
- ib = (struct lance_init_block *) (dev->mem_start);
- if (!netif_running(dev))
- return;
- if (lp->tx_old != lp->tx_new) {
- mod_timer(&lp->multicast_timer, jiffies + 4);
- netif_wake_queue(dev);
- return;
- }
- netif_stop_queue(dev);
- writereg(&ll->rap, LE_CSR0);
- writereg(&ll->rdp, LE_C0_STOP);
- lance_init_ring(dev);
- if (dev->flags & IFF_PROMISC) {
- ib->mode |= LE_MO_PROM;
- } else {
- ib->mode &= ~LE_MO_PROM;
- lance_load_multicast(dev);
- }
- load_csrs(lp);
- init_restart_lance(lp);
- netif_wake_queue(dev);
- }
- static void lance_set_multicast_retry(unsigned long _opaque)
- {
- struct net_device *dev = (struct net_device *) _opaque;
- lance_set_multicast(dev);
- }
- static int __init dec_lance_init(const int type, const int slot)
- {
- static unsigned version_printed;
- struct net_device *dev;
- struct lance_private *lp;
- volatile struct lance_regs *ll;
- int i, ret;
- unsigned long esar_base;
- unsigned char *esar;
- #ifndef CONFIG_TC
- system_base = KN01_LANCE_BASE;
- #endif
- if (dec_lance_debug && version_printed++ == 0)
- printk(version);
- dev = init_etherdev(NULL, sizeof(struct lance_private));
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- /*
- * init_etherdev ensures the data structures used by the LANCE
- * are aligned.
- */
- lp = (struct lance_private *) dev->priv;
- spin_lock_init(&lp->lock);
- lp->type = type;
- lp->slot = slot;
- switch (type) {
- #ifdef CONFIG_TC
- case ASIC_LANCE:
- dev->base_addr = system_base + LANCE;
- /* buffer space for the on-board LANCE shared memory */
- /*
- * FIXME: ugly hack!
- */
- dev->mem_start = KSEG1ADDR(0x00020000);
- dev->mem_end = dev->mem_start + 0x00020000;
- dev->irq = dec_interrupt[DEC_IRQ_LANCE];
- esar_base = system_base + ESAR;
- /* Workaround crash with booting KN04 2.1k from Disk */
- memset((void *)dev->mem_start, 0,
- dev->mem_end - dev->mem_start);
- /*
- * setup the pointer arrays, this sucks [tm] :-(
- */
- for (i = 0; i < RX_RING_SIZE; i++) {
- lp->rx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- 2 * i * RX_BUFF_SIZE);
- lp->rx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- lp->tx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- 2 * RX_RING_SIZE * RX_BUFF_SIZE +
- 2 * i * TX_BUFF_SIZE);
- lp->tx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC +
- RX_RING_SIZE * RX_BUFF_SIZE +
- i * TX_BUFF_SIZE);
- }
- /* Setup I/O ASIC LANCE DMA. */
- lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
- ioasic_write(LANCE_DMA_P, PHYSADDR(dev->mem_start) << 3);
- break;
- case PMAD_LANCE:
- claim_tc_card(slot);
- dev->mem_start = get_tc_base_addr(slot);
- dev->base_addr = dev->mem_start + 0x100000;
- dev->irq = get_tc_irq_nr(slot);
- esar_base = dev->mem_start + 0x1c0002;
- lp->dma_irq = -1;
- for (i = 0; i < RX_RING_SIZE; i++) {
- lp->rx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- i * RX_BUFF_SIZE);
- lp->rx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- lp->tx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- RX_RING_SIZE * RX_BUFF_SIZE +
- i * TX_BUFF_SIZE);
- lp->tx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC +
- RX_RING_SIZE * RX_BUFF_SIZE +
- i * TX_BUFF_SIZE);
- }
- break;
- #endif
- case PMAX_LANCE:
- dev->irq = dec_interrupt[DEC_IRQ_LANCE];
- dev->base_addr = KN01_LANCE_BASE;
- dev->mem_start = KN01_LANCE_BASE + 0x01000000;
- esar_base = KN01_RTC_BASE + 1;
- lp->dma_irq = -1;
- /*
- * setup the pointer arrays, this sucks [tm] :-(
- */
- for (i = 0; i < RX_RING_SIZE; i++) {
- lp->rx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- 2 * i * RX_BUFF_SIZE);
- lp->rx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- lp->tx_buf_ptr_cpu[i] =
- (char *)(dev->mem_start + BUF_OFFSET_CPU +
- 2 * RX_RING_SIZE * RX_BUFF_SIZE +
- 2 * i * TX_BUFF_SIZE);
- lp->tx_buf_ptr_lnc[i] =
- (char *)(BUF_OFFSET_LNC +
- RX_RING_SIZE * RX_BUFF_SIZE +
- i * TX_BUFF_SIZE);
- }
- break;
- default:
- printk("declance_init called with unknown typen");
- ret = -ENODEV;
- goto err_out;
- }
- ll = (struct lance_regs *) dev->base_addr;
- esar = (unsigned char *) esar_base;
- /* prom checks */
- /* First, check for test pattern */
- if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
- esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
- printk("Ethernet station address prom not found!n");
- ret = -ENODEV;
- goto err_out;
- }
- /* Check the prom contents */
- for (i = 0; i < 8; i++) {
- if (esar[i * 4] != esar[0x3c - i * 4] &&
- esar[i * 4] != esar[0x40 + i * 4] &&
- esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
- printk("Something is wrong with the ethernet "
- "station address prom!n");
- ret = -ENODEV;
- goto err_out;
- }
- }
- lp->next = root_lance_dev;
- root_lance_dev = dev;
- /* Copy the ethernet address to the device structure, later to the
- * lance initialization block so the lance gets it every time it's
- * (re)initialized.
- */
- switch (type) {
- case ASIC_LANCE:
- printk("%s: IOASIC onboard LANCE, addr = ", dev->name);
- break;
- case PMAD_LANCE:
- printk("%s: PMAD-AA, addr = ", dev->name);
- break;
- case PMAX_LANCE:
- printk("%s: PMAX onboard LANCE, addr = ", dev->name);
- break;
- }
- for (i = 0; i < 6; i++) {
- dev->dev_addr[i] = esar[i * 4];
- printk("%2.2x%c", dev->dev_addr[i], i == 5 ? ',' : ':');
- }
- printk(" irq = %dn", dev->irq);
- dev->open = &lance_open;
- dev->stop = &lance_close;
- dev->hard_start_xmit = &lance_start_xmit;
- dev->tx_timeout = &lance_tx_timeout;
- dev->watchdog_timeo = 5*HZ;
- dev->get_stats = &lance_get_stats;
- dev->set_multicast_list = &lance_set_multicast;
- /* lp->ll is the location of the registers for lance card */
- lp->ll = ll;
- /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
- * specification.
- */
- lp->busmaster_regval = 0;
- dev->dma = 0;
- /* We cannot sleep if the chip is busy during a
- * multicast list update event, because such events
- * can occur from interrupts (ex. IPv6). So we
- * use a timer to try again later when necessary. -DaveM
- */
- init_timer(&lp->multicast_timer);
- lp->multicast_timer.data = (unsigned long) dev;
- lp->multicast_timer.function = &lance_set_multicast_retry;
- return 0;
- err_out:
- unregister_netdev(dev);
- kfree(dev);
- return ret;
- }
- /* Find all the lance cards on the system and initialize them */
- static int __init dec_lance_probe(void)
- {
- int count = 0;
- /* Scan slots for PMAD-AA cards first. */
- #ifdef CONFIG_TC
- if (TURBOCHANNEL) {
- int slot;
- while ((slot = search_tc_card("PMAD-AA")) >= 0) {
- if (dec_lance_init(PMAD_LANCE, slot) < 0)
- break;
- count++;
- }
- }
- #endif
- /* Then handle onboard devices. */
- if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
- if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
- #ifdef CONFIG_TC
- if (dec_lance_init(ASIC_LANCE, -1) >= 0)
- count++;
- #endif
- } else if (!TURBOCHANNEL) {
- if (dec_lance_init(PMAX_LANCE, -1) >= 0)
- count++;
- }
- }
- return (count > 0) ? 0 : -ENODEV;
- }
- static void __exit dec_lance_cleanup(void)
- {
- while (root_lance_dev) {
- struct net_device *dev = root_lance_dev;
- struct lance_private *lp = (struct lance_private *)dev->priv;
- #ifdef CONFIG_TC
- if (lp->slot >= 0)
- release_tc_card(lp->slot);
- #endif
- root_lance_dev = lp->next;
- unregister_netdev(dev);
- kfree(dev);
- }
- }
- module_init(dec_lance_probe);
- module_exit(dec_lance_cleanup);