| /* |
| * Lance ethernet driver for the MIPS processor based |
| * DECstation family |
| * |
| * |
| * adopted from sunlance.c by Richard van den Berg |
| * |
| * Copyright (C) 2002, 2003, 2005 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/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/spinlock.h> |
| #include <linux/stddef.h> |
| #include <linux/string.h> |
| |
| #include <asm/addrspace.h> |
| #include <asm/system.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/system.h> |
| #include <asm/dec/tc.h> |
| |
| static char version[] __devinitdata = |
| "declance.c: v0.009 by Linux MIPS DECstation task force\n"; |
| |
| 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 |
| |
| |
| #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) (CPHYSADDR(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 |
| * dependent. |
| * 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 = netdev_priv(dev); |
| 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 = netdev_priv(dev); |
| 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 = netdev_priv(dev); |
| 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 Lost\n", 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, restarting\n", |
| 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 irqreturn_t lance_dma_merr_int(const int irq, void *dev_id) |
| { |
| struct net_device *dev = (struct net_device *) dev_id; |
| |
| printk("%s: DMA error\n", dev->name); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t lance_interrupt(const int irq, void *dev_id) |
| { |
| struct net_device *dev = (struct net_device *) dev_id; |
| struct lance_private *lp = netdev_priv(dev); |
| 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 %04x\n", 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); |
| return IRQ_HANDLED; |
| } |
| |
| 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 = netdev_priv(dev); |
| 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("%s: Can't get IRQ %d\n", dev->name, dev->irq); |
| return -EAGAIN; |
| } |
| if (lp->dma_irq >= 0) { |
| unsigned long flags; |
| |
| if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0, |
| "lance error", dev)) { |
| free_irq(dev->irq, dev); |
| printk("%s: Can't get DMA IRQ %d\n", dev->name, |
| lp->dma_irq); |
| return -EAGAIN; |
| } |
| |
| spin_lock_irqsave(&ioasic_ssr_lock, flags); |
| |
| fast_mb(); |
| /* Enable I/O ASIC LANCE DMA. */ |
| ioasic_write(IO_REG_SSR, |
| ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN); |
| |
| fast_mb(); |
| spin_unlock_irqrestore(&ioasic_ssr_lock, flags); |
| } |
| |
| status = init_restart_lance(lp); |
| return status; |
| } |
| |
| static int lance_close(struct net_device *dev) |
| { |
| struct lance_private *lp = netdev_priv(dev); |
| 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) { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ioasic_ssr_lock, flags); |
| |
| fast_mb(); |
| /* Disable I/O ASIC LANCE DMA. */ |
| ioasic_write(IO_REG_SSR, |
| ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN); |
| |
| fast_iob(); |
| spin_unlock_irqrestore(&ioasic_ssr_lock, flags); |
| |
| free_irq(lp->dma_irq, dev); |
| } |
| free_irq(dev->irq, dev); |
| return 0; |
| } |
| |
| static inline int lance_reset(struct net_device *dev) |
| { |
| struct lance_private *lp = netdev_priv(dev); |
| 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 = netdev_priv(dev); |
| volatile struct lance_regs *ll = lp->ll; |
| |
| printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n", |
| 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 = netdev_priv(dev); |
| 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; |
| |
| if (len < ETH_ZLEN) { |
| if (skb_padto(skb, ETH_ZLEN)) |
| return 0; |
| len = ETH_ZLEN; |
| } |
| |
| 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 it's 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 = netdev_priv(dev); |
| |
| 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; |
| 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 = netdev_priv(dev); |
| 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 * HZ/100); |
| 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; |
| static const char fmt[] = "declance%d"; |
| char name[10]; |
| struct net_device *dev; |
| struct lance_private *lp; |
| volatile struct lance_regs *ll; |
| int i, ret; |
| unsigned long esar_base; |
| unsigned char *esar; |
| |
| if (dec_lance_debug && version_printed++ == 0) |
| printk(version); |
| |
| i = 0; |
| dev = root_lance_dev; |
| while (dev) { |
| i++; |
| lp = (struct lance_private *)dev->priv; |
| dev = lp->next; |
| } |
| snprintf(name, sizeof(name), fmt, i); |
| |
| dev = alloc_etherdev(sizeof(struct lance_private)); |
| if (!dev) { |
| printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n", |
| name); |
| ret = -ENOMEM; |
| goto err_out; |
| } |
| |
| /* |
| * alloc_etherdev ensures the data structures used by the LANCE |
| * are aligned. |
| */ |
| lp = netdev_priv(dev); |
| spin_lock_init(&lp->lock); |
| |
| lp->type = type; |
| lp->slot = slot; |
| switch (type) { |
| #ifdef CONFIG_TC |
| case ASIC_LANCE: |
| dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE); |
| |
| /* buffer space for the on-board LANCE shared memory */ |
| /* |
| * FIXME: ugly hack! |
| */ |
| dev->mem_start = CKSEG1ADDR(0x00020000); |
| dev->mem_end = dev->mem_start + 0x00020000; |
| dev->irq = dec_interrupt[DEC_IRQ_LANCE]; |
| esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_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(IO_REG_LANCE_DMA_P, |
| CPHYSADDR(dev->mem_start) << 3); |
| |
| break; |
| |
| case PMAD_LANCE: |
| claim_tc_card(slot); |
| |
| dev->mem_start = CKSEG1ADDR(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 = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE); |
| dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM); |
| esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 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(KERN_ERR "%s: declance_init called with unknown type\n", |
| name); |
| ret = -ENODEV; |
| goto err_out_free_dev; |
| } |
| |
| 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(KERN_ERR |
| "%s: Ethernet station address prom not found!\n", |
| name); |
| ret = -ENODEV; |
| goto err_out_free_dev; |
| } |
| /* 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(KERN_ERR "%s: Something is wrong with the " |
| "ethernet station address prom!\n", name); |
| ret = -ENODEV; |
| goto err_out_free_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 = ", name); |
| break; |
| case PMAD_LANCE: |
| printk("%s: PMAD-AA, addr = ", name); |
| break; |
| case PMAX_LANCE: |
| printk("%s: PMAX onboard LANCE, addr = ", 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 = %d\n", 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; |
| |
| ret = register_netdev(dev); |
| if (ret) { |
| printk(KERN_ERR |
| "%s: Unable to register netdev, aborting.\n", name); |
| goto err_out_free_dev; |
| } |
| |
| lp->next = root_lance_dev; |
| root_lance_dev = dev; |
| |
| printk("%s: registered as %s.\n", name, dev->name); |
| return 0; |
| |
| err_out_free_dev: |
| free_netdev(dev); |
| |
| err_out: |
| 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 = netdev_priv(dev); |
| |
| unregister_netdev(dev); |
| #ifdef CONFIG_TC |
| if (lp->slot >= 0) |
| release_tc_card(lp->slot); |
| #endif |
| root_lance_dev = lp->next; |
| free_netdev(dev); |
| } |
| } |
| |
| module_init(dec_lance_probe); |
| module_exit(dec_lance_cleanup); |