/* * Copyright 2000, 2001 MontaVista Software Inc. * Author: MontaVista Software, Inc. * stevel@mvista.com or source@mvista.com * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Ethernet driver for the MIPS GT96100 Advanced Communication Controller. * * Revision history * * 11.11.2001 Moved to 2.4.14, ppopov@mvista.com. Modified driver to add * proper gt96100A support. * 12.05.2001 Moved eth port 0 to irq 3 (mapped to GT_SERINT0 on EV96100A) * in order for both ports to work. Also cleaned up boot * option support (mac address string parsing), fleshed out * gt96100_cleanup_module(), and other general code cleanups * . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DESC_BE 1 #define DESC_DATA_BE 1 #define GT96100_DEBUG 2 #include "gt96100eth.h" // prototypes static void* dmaalloc(size_t size, dma_addr_t *dma_handle); static void dmafree(size_t size, void *vaddr); static void gt96100_delay(int msec); static int gt96100_add_hash_entry(struct net_device *dev, unsigned char* addr); static void read_mib_counters(struct gt96100_private *gp); static int read_MII(int phy_addr, u32 reg); static int write_MII(int phy_addr, u32 reg, u16 data); static int gt96100_init_module(void); static void gt96100_cleanup_module(void); static void dump_MII(int dbg_lvl, struct net_device *dev); static void dump_tx_desc(int dbg_lvl, struct net_device *dev, int i); static void dump_rx_desc(int dbg_lvl, struct net_device *dev, int i); static void dump_skb(int dbg_lvl, struct net_device *dev, struct sk_buff *skb); static void update_stats(struct gt96100_private *gp); static void abort(struct net_device *dev, u32 abort_bits); static void hard_stop(struct net_device *dev); static void enable_ether_irq(struct net_device *dev); static void disable_ether_irq(struct net_device *dev); static int gt96100_probe1(struct pci_dev *pci, int port_num); static void reset_tx(struct net_device *dev); static void reset_rx(struct net_device *dev); static int gt96100_check_tx_consistent(struct gt96100_private *gp); static int gt96100_init(struct net_device *dev); static int gt96100_open(struct net_device *dev); static int gt96100_close(struct net_device *dev); static int gt96100_tx(struct sk_buff *skb, struct net_device *dev); static int gt96100_rx(struct net_device *dev, u32 status); static irqreturn_t gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs); static void gt96100_tx_timeout(struct net_device *dev); static void gt96100_set_rx_mode(struct net_device *dev); static struct net_device_stats* gt96100_get_stats(struct net_device *dev); extern char * __init prom_getcmdline(void); static int max_interrupt_work = 32; #define nibswap(x) ((((x) >> 4) & 0x0f) | (((x) << 4) & 0xf0)) #define RUN_AT(x) (jiffies + (x)) // For reading/writing 32-bit words and half-words from/to DMA memory #ifdef DESC_BE #define cpu_to_dma32 cpu_to_be32 #define dma32_to_cpu be32_to_cpu #define cpu_to_dma16 cpu_to_be16 #define dma16_to_cpu be16_to_cpu #else #define cpu_to_dma32 cpu_to_le32 #define dma32_to_cpu le32_to_cpu #define cpu_to_dma16 cpu_to_le16 #define dma16_to_cpu le16_to_cpu #endif static char mac0[18] = "00.02.03.04.05.06"; static char mac1[18] = "00.01.02.03.04.05"; module_param_string(mac0, mac0, 18, 0); module_param_string(mac1, mac0, 18, 0); MODULE_PARM_DESC(mac0, "MAC address for GT96100 ethernet port 0"); MODULE_PARM_DESC(mac1, "MAC address for GT96100 ethernet port 1"); /* * Info for the GT96100 ethernet controller's ports. */ static struct gt96100_if_t { struct net_device *dev; unsigned int iobase; // IO Base address of this port int irq; // IRQ number of this port char *mac_str; } gt96100_iflist[NUM_INTERFACES] = { { NULL, GT96100_ETH0_BASE, GT96100_ETHER0_IRQ, mac0 }, { NULL, GT96100_ETH1_BASE, GT96100_ETHER1_IRQ, mac1 } }; static inline const char* chip_name(int chip_rev) { switch (chip_rev) { case REV_GT96100: return "GT96100"; case REV_GT96100A_1: case REV_GT96100A: return "GT96100A"; default: return "Unknown GT96100"; } } /* DMA memory allocation, derived from pci_alloc_consistent. */ static void * dmaalloc(size_t size, dma_addr_t *dma_handle) { void *ret; ret = (void *)__get_free_pages(GFP_ATOMIC | GFP_DMA, get_order(size)); if (ret != NULL) { dma_cache_inv((unsigned long)ret, size); if (dma_handle != NULL) *dma_handle = virt_to_phys(ret); /* bump virtual address up to non-cached area */ ret = (void*)KSEG1ADDR(ret); } return ret; } static void dmafree(size_t size, void *vaddr) { vaddr = (void*)KSEG0ADDR(vaddr); free_pages((unsigned long)vaddr, get_order(size)); } static void gt96100_delay(int ms) { if (in_interrupt()) return; else msleep_interruptible(ms); } static int parse_mac_addr(struct net_device *dev, char* macstr) { int i, j; unsigned char result, value; for (i=0; i<6; i++) { result = 0; if (i != 5 && *(macstr+2) != '.') { err(__FILE__ "invalid mac address format: %d %c\n", i, *(macstr+2)); return -EINVAL; } for (j=0; j<2; j++) { if (isxdigit(*macstr) && (value = isdigit(*macstr) ? *macstr-'0' : toupper(*macstr)-'A'+10) < 16) { result = result*16 + value; macstr++; } else { err(__FILE__ "invalid mac address " "character: %c\n", *macstr); return -EINVAL; } } macstr++; // step over '.' dev->dev_addr[i] = result; } return 0; } static int read_MII(int phy_addr, u32 reg) { int timedout = 20; u32 smir = smirOpCode | (phy_addr << smirPhyAdBit) | (reg << smirRegAdBit); // wait for last operation to complete while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) { // snooze for 1 msec and check again gt96100_delay(1); if (--timedout == 0) { printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__); return -ENODEV; } } GT96100_WRITE(GT96100_ETH_SMI_REG, smir); timedout = 20; // wait for read to complete while (!((smir = GT96100_READ(GT96100_ETH_SMI_REG)) & smirReadValid)) { // snooze for 1 msec and check again gt96100_delay(1); if (--timedout == 0) { printk(KERN_ERR "%s: timeout!!\n", __FUNCTION__); return -ENODEV; } } return (int)(smir & smirDataMask); } static void dump_tx_desc(int dbg_lvl, struct net_device *dev, int i) { struct gt96100_private *gp = netdev_priv(dev); gt96100_td_t *td = &gp->tx_ring[i]; dbg(dbg_lvl, "Tx descriptor at 0x%08lx:\n", virt_to_phys(td)); dbg(dbg_lvl, " cmdstat=%04x, byte_cnt=%04x, buff_ptr=%04x, next=%04x\n", dma32_to_cpu(td->cmdstat), dma16_to_cpu(td->byte_cnt), dma32_to_cpu(td->buff_ptr), dma32_to_cpu(td->next)); } static void dump_rx_desc(int dbg_lvl, struct net_device *dev, int i) { struct gt96100_private *gp = netdev_priv(dev); gt96100_rd_t *rd = &gp->rx_ring[i]; dbg(dbg_lvl, "Rx descriptor at 0x%08lx:\n", virt_to_phys(rd)); dbg(dbg_lvl, " cmdstat=%04x, buff_sz=%04x, byte_cnt=%04x, " "buff_ptr=%04x, next=%04x\n", dma32_to_cpu(rd->cmdstat), dma16_to_cpu(rd->buff_sz), dma16_to_cpu(rd->byte_cnt), dma32_to_cpu(rd->buff_ptr), dma32_to_cpu(rd->next)); } static int write_MII(int phy_addr, u32 reg, u16 data) { int timedout = 20; u32 smir = (phy_addr << smirPhyAdBit) | (reg << smirRegAdBit) | data; // wait for last operation to complete while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) { // snooze for 1 msec and check again gt96100_delay(1); if (--timedout == 0) { printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__); return -1; } } GT96100_WRITE(GT96100_ETH_SMI_REG, smir); return 0; } static void dump_MII(int dbg_lvl, struct net_device *dev) { int i, val; struct gt96100_private *gp = netdev_priv(dev); if (dbg_lvl <= GT96100_DEBUG) { for (i=0; i<7; i++) { if ((val = read_MII(gp->phy_addr, i)) >= 0) printk("MII Reg %d=%x\n", i, val); } for (i=16; i<21; i++) { if ((val = read_MII(gp->phy_addr, i)) >= 0) printk("MII Reg %d=%x\n", i, val); } } } static void dump_hw_addr(int dbg_lvl, struct net_device *dev, const char* pfx, const char* func, unsigned char* addr_str) { int i; char buf[100], octet[5]; if (dbg_lvl <= GT96100_DEBUG) { sprintf(buf, pfx, func); for (i = 0; i < 6; i++) { sprintf(octet, "%2.2x%s", addr_str[i], i<5 ? ":" : "\n"); strcat(buf, octet); } info("%s", buf); } } static void dump_skb(int dbg_lvl, struct net_device *dev, struct sk_buff *skb) { int i; unsigned char* skbdata; if (dbg_lvl <= GT96100_DEBUG) { dbg(dbg_lvl, "%s: skb=%p, skb->data=%p, skb->len=%d\n", __FUNCTION__, skb, skb->data, skb->len); skbdata = (unsigned char*)KSEG1ADDR(skb->data); for (i=0; ilen; i++) { if (!(i % 16)) printk(KERN_DEBUG "\n %3.3x: %2.2x,", i, skbdata[i]); else printk(KERN_DEBUG "%2.2x,", skbdata[i]); } printk(KERN_DEBUG "\n"); } } static int gt96100_add_hash_entry(struct net_device *dev, unsigned char* addr) { struct gt96100_private *gp = netdev_priv(dev); //u16 hashResult, stmp; //unsigned char ctmp, hash_ea[6]; u32 tblEntry1, tblEntry0, *tblEntryAddr; int i; tblEntry1 = hteValid | hteRD; tblEntry1 |= (u32)addr[5] << 3; tblEntry1 |= (u32)addr[4] << 11; tblEntry1 |= (u32)addr[3] << 19; tblEntry1 |= ((u32)addr[2] & 0x1f) << 27; dbg(3, "%s: tblEntry1=%x\n", __FUNCTION__, tblEntry1); tblEntry0 = ((u32)addr[2] >> 5) & 0x07; tblEntry0 |= (u32)addr[1] << 3; tblEntry0 |= (u32)addr[0] << 11; dbg(3, "%s: tblEntry0=%x\n", __FUNCTION__, tblEntry0); #if 0 for (i=0; i<6; i++) { // nibble swap ctmp = nibswap(addr[i]); // invert every nibble hash_ea[i] = ((ctmp&1)<<3) | ((ctmp&8)>>3) | ((ctmp&2)<<1) | ((ctmp&4)>>1); hash_ea[i] |= ((ctmp&0x10)<<3) | ((ctmp&0x80)>>3) | ((ctmp&0x20)<<1) | ((ctmp&0x40)>>1); } dump_hw_addr(3, dev, "%s: nib swap/invt addr=", __FUNCTION__, hash_ea); if (gp->hash_mode == 0) { hashResult = ((u16)hash_ea[0] & 0xfc) << 7; stmp = ((u16)hash_ea[0] & 0x03) | (((u16)hash_ea[1] & 0x7f) << 2); stmp ^= (((u16)hash_ea[1] >> 7) & 0x01) | ((u16)hash_ea[2] << 1); stmp ^= (u16)hash_ea[3] | (((u16)hash_ea[4] & 1) << 8); hashResult |= stmp; } else { return -1; // don't support hash mode 1 } dbg(3, "%s: hashResult=%x\n", __FUNCTION__, hashResult); tblEntryAddr = (u32 *)(&gp->hash_table[((u32)hashResult & 0x7ff) << 3]); dbg(3, "%s: tblEntryAddr=%p\n", tblEntryAddr, __FUNCTION__); for (i=0; i= HASH_HOP_NUMBER) { err("%s: expired!\n", __FUNCTION__); return -1; // Couldn't find an unused entry } #else tblEntryAddr = (u32 *)gp->hash_table; for (i=0; imib; int i; for (i=0; imib; struct net_device_stats *stats = &gp->stats; read_mib_counters(gp); stats->rx_packets = mib->totalFramesReceived; stats->tx_packets = mib->framesSent; stats->rx_bytes = mib->totalByteReceived; stats->tx_bytes = mib->byteSent; stats->rx_errors = mib->totalFramesReceived - mib->framesReceived; //the tx error counters are incremented by the ISR //rx_dropped incremented by gt96100_rx //tx_dropped incremented by gt96100_tx stats->multicast = mib->multicastFramesReceived; // collisions incremented by gt96100_tx_complete stats->rx_length_errors = mib->oversizeFrames + mib->fragments; // The RxError condition means the Rx DMA encountered a // CPU owned descriptor, which, if things are working as // they should, means the Rx ring has overflowed. stats->rx_over_errors = mib->macRxError; stats->rx_crc_errors = mib->cRCError; } static void abort(struct net_device *dev, u32 abort_bits) { struct gt96100_private *gp = netdev_priv(dev); int timedout = 100; // wait up to 100 msec for hard stop to complete dbg(3, "%s\n", __FUNCTION__); // Return if neither Rx or Tx abort bits are set if (!(abort_bits & (sdcmrAR | sdcmrAT))) return; // make sure only the Rx/Tx abort bits are set abort_bits &= (sdcmrAR | sdcmrAT); spin_lock(&gp->lock); // abort any Rx/Tx DMA immediately GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, abort_bits); dbg(3, "%s: SDMA comm = %x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM)); // wait for abort to complete while (GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM) & abort_bits) { // snooze for 1 msec and check again gt96100_delay(1); if (--timedout == 0) { err("%s: timeout!!\n", __FUNCTION__); break; } } spin_unlock(&gp->lock); } static void hard_stop(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); dbg(3, "%s\n", __FUNCTION__); disable_ether_irq(dev); abort(dev, sdcmrAR | sdcmrAT); // disable port GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, 0); } static void enable_ether_irq(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); u32 intMask; /* * route ethernet interrupt to GT_SERINT0 for port 0, * GT_INT0 for port 1. */ int intr_mask_reg = (gp->port_num == 0) ? GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK; if (gp->chip_rev >= REV_GT96100A_1) { intMask = icrTxBufferLow | icrTxEndLow | icrTxErrorLow | icrRxOVR | icrTxUdr | icrRxBufferQ0 | icrRxErrorQ0 | icrMIIPhySTC | icrEtherIntSum; } else { intMask = icrTxBufferLow | icrTxEndLow | icrTxErrorLow | icrRxOVR | icrTxUdr | icrRxBuffer | icrRxError | icrMIIPhySTC | icrEtherIntSum; } // unmask interrupts GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, intMask); intMask = GT96100_READ(intr_mask_reg); intMask |= 1<port_num; GT96100_WRITE(intr_mask_reg, intMask); } static void disable_ether_irq(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); u32 intMask; int intr_mask_reg = (gp->port_num == 0) ? GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK; intMask = GT96100_READ(intr_mask_reg); intMask &= ~(1<port_num); GT96100_WRITE(intr_mask_reg, intMask); GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, 0); } /* * Init GT96100 ethernet controller driver */ static int gt96100_init_module(void) { struct pci_dev *pci; int i, retval=0; u32 cpuConfig; /* * Stupid probe because this really isn't a PCI device */ if (!(pci = pci_get_device(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT96100, NULL)) && !(pci = pci_get_device(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT96100A, NULL))) { printk(KERN_ERR __FILE__ ": GT96100 not found!\n"); return -ENODEV; } cpuConfig = GT96100_READ(GT96100_CPU_INTERF_CONFIG); if (cpuConfig & (1<<12)) { printk(KERN_ERR __FILE__ ": must be in Big Endian mode!\n"); return -ENODEV; } for (i=0; i < NUM_INTERFACES; i++) retval |= gt96100_probe1(pci, i); pci_dev_put(pci); return retval; } static int __init gt96100_probe1(struct pci_dev *pci, int port_num) { struct gt96100_private *gp = NULL; struct gt96100_if_t *gtif = >96100_iflist[port_num]; int phy_addr, phy_id1, phy_id2; u32 phyAD; int retval; unsigned char chip_rev; struct net_device *dev = NULL; if (gtif->irq < 0) { printk(KERN_ERR "%s: irq unknown - probing not supported\n", __FUNCTION__); return -ENODEV; } pci_read_config_byte(pci, PCI_REVISION_ID, &chip_rev); if (chip_rev >= REV_GT96100A_1) { phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG); phy_addr = (phyAD >> (5*port_num)) & 0x1f; } else { /* * not sure what's this about -- probably a gt bug */ phy_addr = port_num; phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG); phyAD &= ~(0x1f << (port_num*5)); phyAD |= phy_addr << (port_num*5); GT96100_WRITE(GT96100_ETH_PHY_ADDR_REG, phyAD); } // probe for the external PHY if ((phy_id1 = read_MII(phy_addr, 2)) <= 0 || (phy_id2 = read_MII(phy_addr, 3)) <= 0) { printk(KERN_ERR "%s: no PHY found on MII%d\n", __FUNCTION__, port_num); return -ENODEV; } if (!request_region(gtif->iobase, GT96100_ETH_IO_SIZE, "GT96100ETH")) { printk(KERN_ERR "%s: request_region failed\n", __FUNCTION__); return -EBUSY; } dev = alloc_etherdev(sizeof(struct gt96100_private)); if (!dev) goto out; gtif->dev = dev; /* private struct aligned and zeroed by alloc_etherdev */ /* Fill in the 'dev' fields. */ dev->base_addr = gtif->iobase; dev->irq = gtif->irq; if ((retval = parse_mac_addr(dev, gtif->mac_str))) { err("%s: MAC address parse failed\n", __FUNCTION__); retval = -EINVAL; goto out1; } gp = netdev_priv(dev); memset(gp, 0, sizeof(*gp)); // clear it gp->port_num = port_num; gp->port_offset = port_num * GT96100_ETH_IO_SIZE; gp->phy_addr = phy_addr; gp->chip_rev = chip_rev; info("%s found at 0x%x, irq %d\n", chip_name(gp->chip_rev), gtif->iobase, gtif->irq); dump_hw_addr(0, dev, "%s: HW Address ", __FUNCTION__, dev->dev_addr); info("%s chip revision=%d\n", chip_name(gp->chip_rev), gp->chip_rev); info("%s ethernet port %d\n", chip_name(gp->chip_rev), gp->port_num); info("external PHY ID1=0x%04x, ID2=0x%04x\n", phy_id1, phy_id2); // Allocate Rx and Tx descriptor rings if (gp->rx_ring == NULL) { // All descriptors in ring must be 16-byte aligned gp->rx_ring = dmaalloc(sizeof(gt96100_rd_t) * RX_RING_SIZE + sizeof(gt96100_td_t) * TX_RING_SIZE, &gp->rx_ring_dma); if (gp->rx_ring == NULL) { retval = -ENOMEM; goto out1; } gp->tx_ring = (gt96100_td_t *)(gp->rx_ring + RX_RING_SIZE); gp->tx_ring_dma = gp->rx_ring_dma + sizeof(gt96100_rd_t) * RX_RING_SIZE; } // Allocate the Rx Data Buffers if (gp->rx_buff == NULL) { gp->rx_buff = dmaalloc(PKT_BUF_SZ*RX_RING_SIZE, &gp->rx_buff_dma); if (gp->rx_buff == NULL) { retval = -ENOMEM; goto out2; } } dbg(3, "%s: rx_ring=%p, tx_ring=%p\n", __FUNCTION__, gp->rx_ring, gp->tx_ring); // Allocate Rx Hash Table if (gp->hash_table == NULL) { gp->hash_table = (char*)dmaalloc(RX_HASH_TABLE_SIZE, &gp->hash_table_dma); if (gp->hash_table == NULL) { retval = -ENOMEM; goto out3; } } dbg(3, "%s: hash=%p\n", __FUNCTION__, gp->hash_table); spin_lock_init(&gp->lock); dev->open = gt96100_open; dev->hard_start_xmit = gt96100_tx; dev->stop = gt96100_close; dev->get_stats = gt96100_get_stats; //dev->do_ioctl = gt96100_ioctl; dev->set_multicast_list = gt96100_set_rx_mode; dev->tx_timeout = gt96100_tx_timeout; dev->watchdog_timeo = GT96100ETH_TX_TIMEOUT; retval = register_netdev(dev); if (retval) goto out4; return 0; out4: dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma); out3: dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff); out2: dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE + sizeof(gt96100_td_t) * TX_RING_SIZE, gp->rx_ring); out1: free_netdev (dev); out: release_region(gtif->iobase, GT96100_ETH_IO_SIZE); err("%s failed. Returns %d\n", __FUNCTION__, retval); return retval; } static void reset_tx(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); int i; abort(dev, sdcmrAT); for (i=0; itx_skbuff[i]) { if (in_interrupt()) dev_kfree_skb_irq(gp->tx_skbuff[i]); else dev_kfree_skb(gp->tx_skbuff[i]); gp->tx_skbuff[i] = NULL; } gp->tx_ring[i].cmdstat = 0; // CPU owns gp->tx_ring[i].byte_cnt = 0; gp->tx_ring[i].buff_ptr = 0; gp->tx_ring[i].next = cpu_to_dma32(gp->tx_ring_dma + sizeof(gt96100_td_t) * (i+1)); dump_tx_desc(4, dev, i); } /* Wrap the ring. */ gp->tx_ring[i-1].next = cpu_to_dma32(gp->tx_ring_dma); // setup only the lowest priority TxCDP reg GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR0, gp->tx_ring_dma); GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR1, 0); // init Tx indeces and pkt counter gp->tx_next_in = gp->tx_next_out = 0; gp->tx_count = 0; } static void reset_rx(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); int i; abort(dev, sdcmrAR); for (i=0; irx_ring[i].next = cpu_to_dma32(gp->rx_ring_dma + sizeof(gt96100_rd_t) * (i+1)); gp->rx_ring[i].buff_ptr = cpu_to_dma32(gp->rx_buff_dma + i*PKT_BUF_SZ); gp->rx_ring[i].buff_sz = cpu_to_dma16(PKT_BUF_SZ); // Give ownership to device, set first and last, enable intr gp->rx_ring[i].cmdstat = cpu_to_dma32((u32)(rxFirst | rxLast | rxOwn | rxEI)); dump_rx_desc(4, dev, i); } /* Wrap the ring. */ gp->rx_ring[i-1].next = cpu_to_dma32(gp->rx_ring_dma); // Setup only the lowest priority RxFDP and RxCDP regs for (i=0; i<4; i++) { if (i == 0) { GT96100ETH_WRITE(gp, GT96100_ETH_1ST_RX_DESC_PTR0, gp->rx_ring_dma); GT96100ETH_WRITE(gp, GT96100_ETH_CURR_RX_DESC_PTR0, gp->rx_ring_dma); } else { GT96100ETH_WRITE(gp, GT96100_ETH_1ST_RX_DESC_PTR0 + i*4, 0); GT96100ETH_WRITE(gp, GT96100_ETH_CURR_RX_DESC_PTR0 + i*4, 0); } } // init Rx NextOut index gp->rx_next_out = 0; } // Returns 1 if the Tx counter and indeces don't gel static int gt96100_check_tx_consistent(struct gt96100_private *gp) { int diff = gp->tx_next_in - gp->tx_next_out; diff = diff<0 ? TX_RING_SIZE + diff : diff; diff = gp->tx_count == TX_RING_SIZE ? diff + TX_RING_SIZE : diff; return (diff != gp->tx_count); } static int gt96100_init(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); u32 tmp; u16 mii_reg; dbg(3, "%s: dev=%p\n", __FUNCTION__, dev); dbg(3, "%s: scs10_lo=%4x, scs10_hi=%4x\n", __FUNCTION__, GT96100_READ(0x8), GT96100_READ(0x10)); dbg(3, "%s: scs32_lo=%4x, scs32_hi=%4x\n", __FUNCTION__, GT96100_READ(0x18), GT96100_READ(0x20)); // Stop and disable Port hard_stop(dev); // Setup CIU Arbiter tmp = GT96100_READ(GT96100_CIU_ARBITER_CONFIG); tmp |= (0x0c << (gp->port_num*2)); // set Ether DMA req priority to hi #ifndef DESC_BE tmp &= ~(1<<31); // set desc endianess to little #else tmp |= (1<<31); #endif GT96100_WRITE(GT96100_CIU_ARBITER_CONFIG, tmp); dbg(3, "%s: CIU Config=%x/%x\n", __FUNCTION__, tmp, GT96100_READ(GT96100_CIU_ARBITER_CONFIG)); // Set routing. tmp = GT96100_READ(GT96100_ROUTE_MAIN) & (0x3f << 18); tmp |= (0x07 << (18 + gp->port_num*3)); GT96100_WRITE(GT96100_ROUTE_MAIN, tmp); /* set MII as peripheral func */ tmp = GT96100_READ(GT96100_GPP_CONFIG2); tmp |= 0x7fff << (gp->port_num*16); GT96100_WRITE(GT96100_GPP_CONFIG2, tmp); /* Set up MII port pin directions */ tmp = GT96100_READ(GT96100_GPP_IO2); tmp |= 0x003d << (gp->port_num*16); GT96100_WRITE(GT96100_GPP_IO2, tmp); // Set-up hash table memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE); // clear it gp->hash_mode = 0; // Add a single entry to hash table - our ethernet address gt96100_add_hash_entry(dev, dev->dev_addr); // Set-up DMA ptr to hash table GT96100ETH_WRITE(gp, GT96100_ETH_HASH_TBL_PTR, gp->hash_table_dma); dbg(3, "%s: Hash Tbl Ptr=%x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_HASH_TBL_PTR)); // Setup Tx reset_tx(dev); dbg(3, "%s: Curr Tx Desc Ptr0=%x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0)); // Setup Rx reset_rx(dev); dbg(3, "%s: 1st/Curr Rx Desc Ptr0=%x/%x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0), GT96100ETH_READ(gp, GT96100_ETH_CURR_RX_DESC_PTR0)); // eth port config register GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT, pcxrFCTL | pcxrFCTLen | pcxrFLP | pcxrDPLXen); mii_reg = read_MII(gp->phy_addr, 0x11); /* int enable register */ mii_reg |= 2; /* enable mii interrupt */ write_MII(gp->phy_addr, 0x11, mii_reg); dbg(3, "%s: PhyAD=%x\n", __FUNCTION__, GT96100_READ(GT96100_ETH_PHY_ADDR_REG)); // setup DMA // We want the Rx/Tx DMA to write/read data to/from memory in // Big Endian mode. Also set DMA Burst Size to 8 64Bit words. #ifdef DESC_DATA_BE GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG, (0xf<irq, dev); return retval; } if ((retval = request_irq(dev->irq, >96100_interrupt, IRQF_SHARED, dev->name, dev))) { err("unable to get IRQ %d\n", dev->irq); return retval; } dbg(2, "%s: Initialization done.\n", __FUNCTION__); return 0; } static int gt96100_close(struct net_device *dev) { dbg(3, "%s: dev=%p\n", __FUNCTION__, dev); // stop the device if (netif_device_present(dev)) { netif_stop_queue(dev); hard_stop(dev); } free_irq(dev->irq, dev); return 0; } static int gt96100_tx(struct sk_buff *skb, struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); unsigned long flags; int nextIn; spin_lock_irqsave(&gp->lock, flags); nextIn = gp->tx_next_in; dbg(3, "%s: nextIn=%d\n", __FUNCTION__, nextIn); if (gp->tx_count >= TX_RING_SIZE) { warn("Tx Ring full, pkt dropped.\n"); gp->stats.tx_dropped++; spin_unlock_irqrestore(&gp->lock, flags); return 1; } if (!(gp->last_psr & psrLink)) { err("%s: Link down, pkt dropped.\n", __FUNCTION__); gp->stats.tx_dropped++; spin_unlock_irqrestore(&gp->lock, flags); return 1; } if (dma32_to_cpu(gp->tx_ring[nextIn].cmdstat) & txOwn) { err("%s: device owns descriptor, pkt dropped.\n", __FUNCTION__); gp->stats.tx_dropped++; // stop the queue, so Tx timeout can fix it netif_stop_queue(dev); spin_unlock_irqrestore(&gp->lock, flags); return 1; } // Prepare the Descriptor at tx_next_in gp->tx_skbuff[nextIn] = skb; gp->tx_ring[nextIn].byte_cnt = cpu_to_dma16(skb->len); gp->tx_ring[nextIn].buff_ptr = cpu_to_dma32(virt_to_phys(skb->data)); // make sure packet gets written back to memory dma_cache_wback_inv((unsigned long)(skb->data), skb->len); // Give ownership to device, set first and last desc, enable interrupt // Setting of ownership bit must be *last*! gp->tx_ring[nextIn].cmdstat = cpu_to_dma32((u32)(txOwn | txGenCRC | txEI | txPad | txFirst | txLast)); dump_tx_desc(4, dev, nextIn); dump_skb(4, dev, skb); // increment tx_next_in with wrap gp->tx_next_in = (nextIn + 1) % TX_RING_SIZE; // If DMA is stopped, restart if (!(GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS) & psrTxLow)) GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD | sdcmrTXDL); // increment count and stop queue if full if (++gp->tx_count == TX_RING_SIZE) { gp->tx_full = 1; netif_stop_queue(dev); dbg(2, "Tx Ring now full, queue stopped.\n"); } dev->trans_start = jiffies; spin_unlock_irqrestore(&gp->lock, flags); return 0; } static int gt96100_rx(struct net_device *dev, u32 status) { struct gt96100_private *gp = netdev_priv(dev); struct sk_buff *skb; int pkt_len, nextOut, cdp; gt96100_rd_t *rd; u32 cmdstat; dbg(3, "%s: dev=%p, status=%x\n", __FUNCTION__, dev, status); cdp = (GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0) - gp->rx_ring_dma) / sizeof(gt96100_rd_t); // Continue until we reach 1st descriptor pointer for (nextOut = gp->rx_next_out; nextOut != cdp; nextOut = (nextOut + 1) % RX_RING_SIZE) { if (--gp->intr_work_done == 0) break; rd = &gp->rx_ring[nextOut]; cmdstat = dma32_to_cpu(rd->cmdstat); dbg(4, "%s: Rx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__, cmdstat, nextOut); if (cmdstat & (u32)rxOwn) { //err("%s: device owns descriptor!\n", __FUNCTION__); // DMA is not finished updating descriptor??? // Leave and come back later to pick-up where // we left off. break; } // Drop this received pkt if there were any errors if (((cmdstat & (u32)(rxErrorSummary)) && (cmdstat & (u32)(rxFirst))) || (status & icrRxError)) { // update the detailed rx error counters that // are not covered by the MIB counters. if (cmdstat & (u32)rxOverrun) gp->stats.rx_fifo_errors++; cmdstat |= (u32)rxOwn; rd->cmdstat = cpu_to_dma32(cmdstat); continue; } /* * Must be first and last (ie only) descriptor of packet. We * ignore (drop) any packets that do not fit in one descriptor. * Every descriptor's receive buffer is large enough to hold * the maximum 802.3 frame size, so a multi-descriptor packet * indicates an error. Most if not all corrupted packets will * have already been dropped by the above check for the * rxErrorSummary status bit. */ if (!(cmdstat & (u32)rxFirst) || !(cmdstat & (u32)rxLast)) { if (cmdstat & (u32)rxFirst) { /* * This is the first descriptor of a * multi-descriptor packet. It isn't corrupted * because the above check for rxErrorSummary * would have dropped it already, so what's * the deal with this packet? Good question, * let's dump it out. */ err("%s: desc not first and last!\n", __FUNCTION__); dump_rx_desc(0, dev, nextOut); } cmdstat |= (u32)rxOwn; rd->cmdstat = cpu_to_dma32(cmdstat); // continue to drop every descriptor of this packet continue; } pkt_len = dma16_to_cpu(rd->byte_cnt); /* Create new skb. */ skb = dev_alloc_skb(pkt_len+2); if (skb == NULL) { err("%s: Memory squeeze, dropping packet.\n", __FUNCTION__); gp->stats.rx_dropped++; cmdstat |= (u32)rxOwn; rd->cmdstat = cpu_to_dma32(cmdstat); continue; } skb->dev = dev; skb_reserve(skb, 2); /* 16 byte IP header align */ memcpy(skb_put(skb, pkt_len), &gp->rx_buff[nextOut*PKT_BUF_SZ], pkt_len); skb->protocol = eth_type_trans(skb, dev); dump_skb(4, dev, skb); netif_rx(skb); /* pass the packet to upper layers */ dev->last_rx = jiffies; // now we can release ownership of this desc back to device cmdstat |= (u32)rxOwn; rd->cmdstat = cpu_to_dma32(cmdstat); } if (nextOut == gp->rx_next_out) dbg(3, "%s: RxCDP did not increment?\n", __FUNCTION__); gp->rx_next_out = nextOut; return 0; } static void gt96100_tx_complete(struct net_device *dev, u32 status) { struct gt96100_private *gp = netdev_priv(dev); int nextOut, cdp; gt96100_td_t *td; u32 cmdstat; cdp = (GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0) - gp->tx_ring_dma) / sizeof(gt96100_td_t); // Continue until we reach the current descriptor pointer for (nextOut = gp->tx_next_out; nextOut != cdp; nextOut = (nextOut + 1) % TX_RING_SIZE) { if (--gp->intr_work_done == 0) break; td = &gp->tx_ring[nextOut]; cmdstat = dma32_to_cpu(td->cmdstat); dbg(3, "%s: Tx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__, cmdstat, nextOut); if (cmdstat & (u32)txOwn) { /* * DMA is not finished writing descriptor??? * Leave and come back later to pick-up where * we left off. */ break; } // increment Tx error stats if (cmdstat & (u32)txErrorSummary) { dbg(2, "%s: Tx error, cmdstat = %x\n", __FUNCTION__, cmdstat); gp->stats.tx_errors++; if (cmdstat & (u32)txReTxLimit) gp->stats.tx_aborted_errors++; if (cmdstat & (u32)txUnderrun) gp->stats.tx_fifo_errors++; if (cmdstat & (u32)txLateCollision) gp->stats.tx_window_errors++; } if (cmdstat & (u32)txCollision) gp->stats.collisions += (u32)((cmdstat & txReTxCntMask) >> txReTxCntBit); // Wake the queue if the ring was full if (gp->tx_full) { gp->tx_full = 0; if (gp->last_psr & psrLink) { netif_wake_queue(dev); dbg(2, "%s: Tx Ring was full, queue waked\n", __FUNCTION__); } } // decrement tx ring buffer count if (gp->tx_count) gp->tx_count--; // free the skb if (gp->tx_skbuff[nextOut]) { dbg(3, "%s: good Tx, skb=%p\n", __FUNCTION__, gp->tx_skbuff[nextOut]); dev_kfree_skb_irq(gp->tx_skbuff[nextOut]); gp->tx_skbuff[nextOut] = NULL; } else { err("%s: no skb!\n", __FUNCTION__); } } gp->tx_next_out = nextOut; if (gt96100_check_tx_consistent(gp)) { err("%s: Tx queue inconsistent!\n", __FUNCTION__); } if ((status & icrTxEndLow) && gp->tx_count != 0) { // we must restart the DMA dbg(3, "%s: Restarting Tx DMA\n", __FUNCTION__); GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD | sdcmrTXDL); } } static irqreturn_t gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct net_device *dev = (struct net_device *)dev_id; struct gt96100_private *gp = netdev_priv(dev); u32 status; int handled = 0; if (dev == NULL) { err("%s: null dev ptr\n", __FUNCTION__); return IRQ_NONE; } dbg(3, "%s: entry, icr=%x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE)); spin_lock(&gp->lock); gp->intr_work_done = max_interrupt_work; while (gp->intr_work_done > 0) { status = GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE); // ACK interrupts GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, ~status); if ((status & icrEtherIntSum) == 0 && !(status & (icrTxBufferLow|icrTxBufferHigh|icrRxBuffer))) break; handled = 1; if (status & icrMIIPhySTC) { u32 psr = GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS); if (gp->last_psr != psr) { dbg(0, "port status:\n"); dbg(0, " %s MBit/s, %s-duplex, " "flow-control %s, link is %s,\n", psr & psrSpeed ? "100":"10", psr & psrDuplex ? "full":"half", psr & psrFctl ? "disabled":"enabled", psr & psrLink ? "up":"down"); dbg(0, " TxLowQ is %s, TxHighQ is %s, " "Transmitter is %s\n", psr & psrTxLow ? "running":"stopped", psr & psrTxHigh ? "running":"stopped", psr & psrTxInProg ? "on":"off"); if ((psr & psrLink) && !gp->tx_full && netif_queue_stopped(dev)) { dbg(0, "%s: Link up, waking queue.\n", __FUNCTION__); netif_wake_queue(dev); } else if (!(psr & psrLink) && !netif_queue_stopped(dev)) { dbg(0, "%s: Link down, stopping queue.\n", __FUNCTION__); netif_stop_queue(dev); } gp->last_psr = psr; } if (--gp->intr_work_done == 0) break; } if (status & (icrTxBufferLow | icrTxEndLow)) gt96100_tx_complete(dev, status); if (status & (icrRxBuffer | icrRxError)) { gt96100_rx(dev, status); } // Now check TX errors (RX errors were handled in gt96100_rx) if (status & icrTxErrorLow) { err("%s: Tx resource error\n", __FUNCTION__); if (--gp->intr_work_done == 0) break; } if (status & icrTxUdr) { err("%s: Tx underrun error\n", __FUNCTION__); if (--gp->intr_work_done == 0) break; } } if (gp->intr_work_done == 0) { // ACK any remaining pending interrupts GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, 0); dbg(3, "%s: hit max work\n", __FUNCTION__); } dbg(3, "%s: exit, icr=%x\n", __FUNCTION__, GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE)); spin_unlock(&gp->lock); return IRQ_RETVAL(handled); } static void gt96100_tx_timeout(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); unsigned long flags; spin_lock_irqsave(&gp->lock, flags); if (!(gp->last_psr & psrLink)) { err("tx_timeout: link down.\n"); spin_unlock_irqrestore(&gp->lock, flags); } else { if (gt96100_check_tx_consistent(gp)) err("tx_timeout: Tx ring error.\n"); disable_ether_irq(dev); spin_unlock_irqrestore(&gp->lock, flags); reset_tx(dev); enable_ether_irq(dev); netif_wake_queue(dev); } } static void gt96100_set_rx_mode(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); unsigned long flags; //struct dev_mc_list *mcptr; dbg(3, "%s: dev=%p, flags=%x\n", __FUNCTION__, dev, dev->flags); // stop the Receiver DMA abort(dev, sdcmrAR); spin_lock_irqsave(&gp->lock, flags); if (dev->flags & IFF_PROMISC) { GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, pcrEN | pcrHS | pcrPM); } #if 0 /* FIXME: currently multicast doesn't work - need to get hash table working first. */ if (dev->mc_count) { // clear hash table memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE); // Add our ethernet address gt96100_add_hash_entry(dev, dev->dev_addr); for (mcptr = dev->mc_list; mcptr; mcptr = mcptr->next) { dump_hw_addr(2, dev, "%s: addr=", __FUNCTION__, mcptr->dmi_addr); gt96100_add_hash_entry(dev, mcptr->dmi_addr); } } #endif // restart Rx DMA GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD); spin_unlock_irqrestore(&gp->lock, flags); } static struct net_device_stats * gt96100_get_stats(struct net_device *dev) { struct gt96100_private *gp = netdev_priv(dev); unsigned long flags; dbg(3, "%s: dev=%p\n", __FUNCTION__, dev); if (netif_device_present(dev)) { spin_lock_irqsave (&gp->lock, flags); update_stats(gp); spin_unlock_irqrestore (&gp->lock, flags); } return &gp->stats; } static void gt96100_cleanup_module(void) { int i; for (i=0; idev != NULL) { struct gt96100_private *gp = (struct gt96100_private *) netdev_priv(gtif->dev); unregister_netdev(gtif->dev); dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma); dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff); dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE + sizeof(gt96100_td_t) * TX_RING_SIZE, gp->rx_ring); free_netdev(gtif->dev); release_region(gtif->iobase, GT96100_ETH_IO_SIZE); } } } static int __init gt96100_setup(char *options) { char *this_opt; if (!options || !*options) return 0; while ((this_opt = strsep (&options, ",")) != NULL) { if (!*this_opt) continue; if (!strncmp(this_opt, "mac0:", 5)) { memcpy(mac0, this_opt+5, 17); mac0[17]= '\0'; } else if (!strncmp(this_opt, "mac1:", 5)) { memcpy(mac1, this_opt+5, 17); mac1[17]= '\0'; } } return 1; } __setup("gt96100eth=", gt96100_setup); module_init(gt96100_init_module); module_exit(gt96100_cleanup_module); MODULE_AUTHOR("Steve Longerbeam "); MODULE_DESCRIPTION("GT96100 Ethernet driver");