diff options
Diffstat (limited to 'drivers/net/gt96100eth.c')
| -rw-r--r-- | drivers/net/gt96100eth.c | 1566 |
1 files changed, 0 insertions, 1566 deletions
diff --git a/drivers/net/gt96100eth.c b/drivers/net/gt96100eth.c deleted file mode 100644 index 2b4db7414475..000000000000 --- a/drivers/net/gt96100eth.c +++ /dev/null @@ -1,1566 +0,0 @@ -/* - * 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 - * <stevel@mvista.com>. - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/errno.h> -#include <linux/in.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/delay.h> -#include <linux/ctype.h> -#include <linux/bitops.h> - -#include <asm/irq.h> -#include <asm/io.h> - -#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; i<skb->len; 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; i++) { - if ((*tblEntryAddr & hteValid) && - !(*tblEntryAddr & hteSkip)) { - // This entry is already occupied, go to next entry - tblEntryAddr += 2; - dbg(3, "%s: skipping to %p\n", __FUNCTION__, - tblEntryAddr); - } else { - memset(tblEntryAddr, 0, 8); - tblEntryAddr[1] = cpu_to_dma32(tblEntry1); - tblEntryAddr[0] = cpu_to_dma32(tblEntry0); - break; - } - } - - if (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; i<RX_HASH_TABLE_SIZE/4; i+=2) { - tblEntryAddr[i+1] = cpu_to_dma32(tblEntry1); - tblEntryAddr[i] = cpu_to_dma32(tblEntry0); - } - -#endif - - return 0; -} - - -static void -read_mib_counters(struct gt96100_private *gp) -{ - u32* mib_regs = (u32*)&gp->mib; - int i; - - for (i=0; i<sizeof(mib_counters_t)/sizeof(u32); i++) - mib_regs[i] = GT96100ETH_READ(gp, GT96100_ETH_MIB_COUNT_BASE + - i*sizeof(u32)); -} - - -static void -update_stats(struct gt96100_private *gp) -{ - mib_counters_t *mib = &gp->mib; - 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<<gp->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<<gp->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_find_device(PCI_VENDOR_ID_MARVELL, - PCI_DEVICE_ID_MARVELL_GT96100, NULL)) && - !(pci = pci_find_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); - - 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; i<TX_RING_SIZE; i++) { - if (gp->tx_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; i<RX_RING_SIZE; i++) { - gp->rx_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<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit)); -#else - GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG, - sdcrBLMR | sdcrBLMT | - (0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit)); -#endif - dbg(3, "%s: SDMA Config=%x\n", __FUNCTION__, - GT96100ETH_READ(gp, GT96100_ETH_SDMA_CONFIG)); - - // start Rx DMA - GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD); - dbg(3, "%s: SDMA Comm=%x\n", __FUNCTION__, - GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM)); - - // enable this port (set hash size to 1/2K) - GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, pcrEN | pcrHS); - dbg(3, "%s: Port Config=%x\n", __FUNCTION__, - GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG)); - - /* - * Disable all Type-of-Service queueing. All Rx packets will be - * treated normally and will be sent to the lowest priority - * queue. - * - * Disable flow-control for now. FIXME: support flow control? - */ - - // clear all the MIB ctr regs - GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT, - pcxrFCTL | pcxrFCTLen | pcxrFLP | - pcxrPRIOrxOverride); - read_mib_counters(gp); - GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT, - pcxrFCTL | pcxrFCTLen | pcxrFLP | - pcxrPRIOrxOverride | pcxrMIBclrMode); - - dbg(3, "%s: Port Config Ext=%x\n", __FUNCTION__, - GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG_EXT)); - - netif_start_queue(dev); - - dump_MII(4, dev); - - // enable interrupts - enable_ether_irq(dev); - - // we should now be receiving frames - return 0; -} - - -static int -gt96100_open(struct net_device *dev) -{ - int retval; - - dbg(2, "%s: dev=%p\n", __FUNCTION__, dev); - - // Initialize and startup the GT-96100 ethernet port - if ((retval = gt96100_init(dev))) { - err("error in gt96100_init\n"); - free_irq(dev->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; i<NUM_INTERFACES; i++) { - struct gt96100_if_t *gtif = >96100_iflist[i]; - if (gtif->dev != 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 <stevel@mvista.com>"); -MODULE_DESCRIPTION("GT96100 Ethernet driver"); |