X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/17c7b6c3fdc48301e50d22cc6138ede16bd1be24..41f0999b88dbb00aa7193b23088c90fbef79e1b6:/target/linux/adm5120/files/drivers/net/adm5120sw.c diff --git a/target/linux/adm5120/files/drivers/net/adm5120sw.c b/target/linux/adm5120/files/drivers/net/adm5120sw.c index 80c81abf7..a92695485 100644 --- a/target/linux/adm5120/files/drivers/net/adm5120sw.c +++ b/target/linux/adm5120/files/drivers/net/adm5120sw.c @@ -1,209 +1,726 @@ /* - * ADM5120 built in ethernet switch driver + * ADM5120 built-in ethernet switch driver * - * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 + * Copyright (C) 2007-2008 Gabor Juhos * - * Inspiration for this driver came from the original ADMtek 2.4 - * driver, Copyright ADMtek Inc. + * This code was based on a driver for Linux 2.6.xx by Jeroen Vreeken. + * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 + * NAPI extension for the Jeroen's driver + * Copyright Thomas Langer (Thomas.Langer@infineon.com), 2007 + * Copyright Friedrich Beckmann (Friedrich.Beckmann@infineon.com), 2007 + * Inspiration for the Jeroen's driver came from the ADMtek 2.4 driver. + * Copyright ADMtek Inc. * - * NAPI extensions by Thomas Langer (Thomas.Langer@infineon.com) - * and Friedrich Beckmann (Friedrich.Beckmann@infineon.com), 2007 - * - * TODO: Add support of high prio queues (currently disabled) + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. * */ -#include -#include + #include -#include -#include -#include +#include #include #include #include +#include +#include +#include +#include + +#include +#include +#include + #include -#include -#include -#include "adm5120sw.h" #include -#include +#include +#include + +#include "adm5120sw.h" + +#define DRV_NAME "adm5120-switch" +#define DRV_DESC "ADM5120 built-in ethernet switch driver" +#define DRV_VERSION "0.1.1" + +#define CONFIG_ADM5120_SWITCH_NAPI 1 +#undef CONFIG_ADM5120_SWITCH_DEBUG + +/* ------------------------------------------------------------------------ */ + +#ifdef CONFIG_ADM5120_SWITCH_DEBUG +#define SW_DBG(f, a...) printk(KERN_DBG "%s: " f, DRV_NAME , ## a) +#else +#define SW_DBG(f, a...) do {} while (0) +#endif +#define SW_ERR(f, a...) printk(KERN_ERR "%s: " f, DRV_NAME , ## a) +#define SW_INFO(f, a...) printk(KERN_INFO "%s: " f, DRV_NAME , ## a) + +#define SWITCH_NUM_PORTS 6 +#define ETH_CSUM_LEN 4 + +#define RX_MAX_PKTLEN 1550 +#define RX_RING_SIZE 64 -MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)"); -MODULE_DESCRIPTION("ADM5120 ethernet switch driver"); -MODULE_LICENSE("GPL"); +#define TX_RING_SIZE 32 +#define TX_QUEUE_LEN 28 /* Limit ring entries actually used. */ +#define TX_TIMEOUT (HZ * 400) -/* default settings - unlimited TX and RX on all ports, default shaper mode */ -static unsigned char bw_matrix[SW_DEVS] = { - 0, 0, 0, 0, 0, 0 +#define RX_DESCS_SIZE (RX_RING_SIZE * sizeof(struct dma_desc *)) +#define RX_SKBS_SIZE (RX_RING_SIZE * sizeof(struct sk_buff *)) +#define TX_DESCS_SIZE (TX_RING_SIZE * sizeof(struct dma_desc *)) +#define TX_SKBS_SIZE (TX_RING_SIZE * sizeof(struct sk_buff *)) + +#define SKB_ALLOC_LEN (RX_MAX_PKTLEN + 32) +#define SKB_RESERVE_LEN (NET_IP_ALIGN + NET_SKB_PAD) + +#define SWITCH_INTS_HIGH (SWITCH_INT_SHD | SWITCH_INT_RHD | SWITCH_INT_HDF) +#define SWITCH_INTS_LOW (SWITCH_INT_SLD | SWITCH_INT_RLD | SWITCH_INT_LDF) +#define SWITCH_INTS_ERR (SWITCH_INT_RDE | SWITCH_INT_SDE | SWITCH_INT_CPUH) +#define SWITCH_INTS_Q (SWITCH_INT_P0QF | SWITCH_INT_P1QF | SWITCH_INT_P2QF | \ + SWITCH_INT_P3QF | SWITCH_INT_P4QF | SWITCH_INT_P5QF | \ + SWITCH_INT_CPQF | SWITCH_INT_GQF) + +#define SWITCH_INTS_ALL (SWITCH_INTS_HIGH | SWITCH_INTS_LOW | \ + SWITCH_INTS_ERR | SWITCH_INTS_Q | \ + SWITCH_INT_MD | SWITCH_INT_PSC) + +#define SWITCH_INTS_USED (SWITCH_INTS_LOW | SWITCH_INT_PSC) +#define SWITCH_INTS_POLL (SWITCH_INT_RLD | SWITCH_INT_LDF | SWITCH_INT_SLD) + +/* ------------------------------------------------------------------------ */ + +struct adm5120_if_priv { + struct net_device *dev; + + unsigned int vlan_no; + unsigned int port_mask; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + struct napi_struct napi; +#endif }; +struct dma_desc { + __u32 buf1; +#define DESC_OWN (1UL << 31) /* Owned by the switch */ +#define DESC_EOR (1UL << 28) /* End of Ring */ +#define DESC_ADDR_MASK 0x1FFFFFF +#define DESC_ADDR(x) ((__u32)(x) & DESC_ADDR_MASK) + __u32 buf2; +#define DESC_BUF2_EN (1UL << 31) /* Buffer 2 enable */ + __u32 buflen; + __u32 misc; +/* definitions for tx/rx descriptors */ +#define DESC_PKTLEN_SHIFT 16 +#define DESC_PKTLEN_MASK 0x7FF +/* tx descriptor specific part */ +#define DESC_CSUM (1UL << 31) /* Append checksum */ +#define DESC_DSTPORT_SHIFT 8 +#define DESC_DSTPORT_MASK 0x3F +#define DESC_VLAN_MASK 0x3F +/* rx descriptor specific part */ +#define DESC_SRCPORT_SHIFT 12 +#define DESC_SRCPORT_MASK 0x7 +#define DESC_DA_MASK 0x3 +#define DESC_DA_SHIFT 4 +#define DESC_IPCSUM_FAIL (1UL << 3) /* IP checksum fail */ +#define DESC_VLAN_TAG (1UL << 2) /* VLAN tag present */ +#define DESC_TYPE_MASK 0x3 /* mask for Packet type */ +#define DESC_TYPE_IP 0x0 /* IP packet */ +#define DESC_TYPE_PPPoE 0x1 /* PPPoE packet */ +} __attribute__ ((aligned(16))); + +/* ------------------------------------------------------------------------ */ + static int adm5120_nrdevs; -static struct net_device *adm5120_devs[SW_DEVS]; +static struct net_device *adm5120_devs[SWITCH_NUM_PORTS]; /* Lookup table port -> device */ -static struct net_device *adm5120_port[SW_DEVS]; +static struct net_device *adm5120_port[SWITCH_NUM_PORTS]; -static struct adm5120_dma - adm5120_dma_txh_v[ADM5120_DMA_TXH] __attribute__((aligned(16))), - adm5120_dma_txl_v[ADM5120_DMA_TXL] __attribute__((aligned(16))), - adm5120_dma_rxh_v[ADM5120_DMA_RXH] __attribute__((aligned(16))), - adm5120_dma_rxl_v[ADM5120_DMA_RXL] __attribute__((aligned(16))), - *adm5120_dma_txh, - *adm5120_dma_txl, - *adm5120_dma_rxh, - *adm5120_dma_rxl; -static struct sk_buff - *adm5120_skb_rxh[ADM5120_DMA_RXH], - *adm5120_skb_rxl[ADM5120_DMA_RXL], - *adm5120_skb_txh[ADM5120_DMA_TXH], - *adm5120_skb_txl[ADM5120_DMA_TXL]; -static int adm5120_rxli = 0; -static int adm5120_txli = 0; -/*static int adm5120_txhi = 0;*/ -static int adm5120_if_open = 0; +static struct dma_desc *txl_descs; +static struct dma_desc *rxl_descs; -static inline void adm5120_set_reg(unsigned int reg, unsigned long val) +static dma_addr_t txl_descs_dma; +static dma_addr_t rxl_descs_dma; + +static struct sk_buff **txl_skbuff; +static struct sk_buff **rxl_skbuff; + +static unsigned int cur_rxl, dirty_rxl; /* producer/consumer ring indices */ +static unsigned int cur_txl, dirty_txl; + +static unsigned int sw_used; + +static spinlock_t tx_lock = SPIN_LOCK_UNLOCKED; + +/* ------------------------------------------------------------------------ */ + +static inline u32 sw_read_reg(u32 reg) { - *(volatile unsigned long*)(SW_BASE+reg) = val; + return __raw_readl((void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); } -static inline unsigned long adm5120_get_reg(unsigned int reg) +static inline void sw_write_reg(u32 reg, u32 val) { - return *(volatile unsigned long*)(SW_BASE+reg); + __raw_writel(val, (void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); } -static inline void adm5120_rx_dma_update(struct adm5120_dma *dma, +static inline void sw_int_mask(u32 mask) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_MASK); + t |= mask; + sw_write_reg(SWITCH_REG_INT_MASK, t); +} + +static inline void sw_int_unmask(u32 mask) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_MASK); + t &= ~mask; + sw_write_reg(SWITCH_REG_INT_MASK, t); +} + +static inline void sw_int_ack(u32 mask) +{ + sw_write_reg(SWITCH_REG_INT_STATUS, mask); +} + +static inline u32 sw_int_status(void) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_STATUS); + t &= ~sw_read_reg(SWITCH_REG_INT_MASK); + return t; +} + +static inline u32 desc_get_srcport(struct dma_desc *desc) +{ + return (desc->misc >> DESC_SRCPORT_SHIFT) & DESC_SRCPORT_MASK; +} + +static inline u32 desc_get_pktlen(struct dma_desc *desc) +{ + return (desc->misc >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK; +} + +static inline int desc_ipcsum_fail(struct dma_desc *desc) +{ + return ((desc->misc & DESC_IPCSUM_FAIL) != 0); +} + +/* ------------------------------------------------------------------------ */ + +static void sw_dump_desc(char *label, struct dma_desc *desc, int tx) +{ + u32 t; + + SW_DBG("%s %s desc/%p\n", label, tx ? "tx" : "rx", desc); + + t = desc->buf1; + SW_DBG(" buf1 %08X addr=%08X; len=%08X %s%s\n", t, + t & DESC_ADDR_MASK, + desc->buflen, + (t & DESC_OWN) ? "SWITCH" : "CPU", + (t & DESC_EOR) ? " RE" : ""); + + t = desc->buf2; + SW_DBG(" buf2 %08X addr=%08X%s\n", desc->buf2, + t & DESC_ADDR_MASK, + (t & DESC_BUF2_EN) ? " EN" : ""); + + t = desc->misc; + if (tx) + SW_DBG(" misc %08X%s pktlen=%04X ports=%02X vlan=%02X\n", t, + (t & DESC_CSUM) ? " CSUM" : "", + (t >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK, + (t >> DESC_DSTPORT_SHIFT) & DESC_DSTPORT_MASK, + t & DESC_VLAN_MASK); + else + SW_DBG(" misc %08X pktlen=%04X port=%d DA=%d%s%s type=%d\n", + t, + (t >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK, + (t >> DESC_SRCPORT_SHIFT) & DESC_SRCPORT_MASK, + (t >> DESC_DA_SHIFT) & DESC_DA_MASK, + (t & DESC_IPCSUM_FAIL) ? " IPCF" : "", + (t & DESC_VLAN_TAG) ? " VLAN" : "", + (t & DESC_TYPE_MASK)); +} + +static void sw_dump_intr_mask(char *label, u32 mask) +{ + SW_DBG("%s %08X%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + label, mask, + (mask & SWITCH_INT_SHD) ? " SHD" : "", + (mask & SWITCH_INT_SLD) ? " SLD" : "", + (mask & SWITCH_INT_RHD) ? " RHD" : "", + (mask & SWITCH_INT_RLD) ? " RLD" : "", + (mask & SWITCH_INT_HDF) ? " HDF" : "", + (mask & SWITCH_INT_LDF) ? " LDF" : "", + (mask & SWITCH_INT_P0QF) ? " P0QF" : "", + (mask & SWITCH_INT_P1QF) ? " P1QF" : "", + (mask & SWITCH_INT_P2QF) ? " P2QF" : "", + (mask & SWITCH_INT_P3QF) ? " P3QF" : "", + (mask & SWITCH_INT_P4QF) ? " P4QF" : "", + (mask & SWITCH_INT_CPQF) ? " CPQF" : "", + (mask & SWITCH_INT_GQF) ? " GQF" : "", + (mask & SWITCH_INT_MD) ? " MD" : "", + (mask & SWITCH_INT_BCS) ? " BCS" : "", + (mask & SWITCH_INT_PSC) ? " PSC" : "", + (mask & SWITCH_INT_ID) ? " ID" : "", + (mask & SWITCH_INT_W0TE) ? " W0TE" : "", + (mask & SWITCH_INT_W1TE) ? " W1TE" : "", + (mask & SWITCH_INT_RDE) ? " RDE" : "", + (mask & SWITCH_INT_SDE) ? " SDE" : "", + (mask & SWITCH_INT_CPUH) ? " CPUH" : ""); +} + +static void sw_dump_regs(void) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_PHY_STATUS); + SW_DBG("phy_status: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_CPUP_CONF); + SW_DBG("cpup_conf: %08X%s%s%s\n", t, + (t & CPUP_CONF_DCPUP) ? " DCPUP" : "", + (t & CPUP_CONF_CRCP) ? " CRCP" : "", + (t & CPUP_CONF_BTM) ? " BTM" : ""); + + t = sw_read_reg(SWITCH_REG_PORT_CONF0); + SW_DBG("port_conf0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PORT_CONF1); + SW_DBG("port_conf1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PORT_CONF2); + SW_DBG("port_conf2: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_VLAN_G1); + SW_DBG("vlan g1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_VLAN_G2); + SW_DBG("vlan g2: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_BW_CNTL0); + SW_DBG("bw_cntl0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_BW_CNTL1); + SW_DBG("bw_cntl1: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_PHY_CNTL0); + SW_DBG("phy_cntl0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL1); + SW_DBG("phy_cntl1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL2); + SW_DBG("phy_cntl2: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL3); + SW_DBG("phy_cntl3: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL4); + SW_DBG("phy_cntl4: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_INT_STATUS); + sw_dump_intr_mask("int_status: ", t); + + t = sw_read_reg(SWITCH_REG_INT_MASK); + sw_dump_intr_mask("int_mask: ", t); + + t = sw_read_reg(SWITCH_REG_SHDA); + SW_DBG("shda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_SLDA); + SW_DBG("slda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_RHDA); + SW_DBG("rhda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_RLDA); + SW_DBG("rlda: %08X\n", t); +} + +/* ------------------------------------------------------------------------ */ + +static inline void adm5120_rx_dma_update(struct dma_desc *desc, struct sk_buff *skb, int end) { - dma->status = 0; - dma->cntl = 0; - dma->len = ADM5120_DMA_RXSIZE; - dma->data = ADM5120_DMA_ADDR(skb->data) | - ADM5120_DMA_OWN | (end ? ADM5120_DMA_RINGEND : 0); -} - -static int adm5120_rx(struct net_device *dev,int *budget) -{ - struct sk_buff *skb, *skbn; - struct adm5120_sw *priv; - struct net_device *cdev; - struct adm5120_dma *dma; - int port, len, quota; - - quota = min(dev->quota, *budget); - dma = &adm5120_dma_rxl[adm5120_rxli]; - while (!(dma->data & ADM5120_DMA_OWN) && quota) { - port = (dma->status & ADM5120_DMA_PORTID); - port >>= ADM5120_DMA_PORTSHIFT; - cdev = adm5120_port[port]; - if (cdev != dev) { /* The current packet belongs to a different device */ - if ((cdev==NULL) || !netif_running(cdev)) { - /* discard (update with old skb) */ - skb = skbn = NULL; - goto rx_skip; - } - else { - netif_rx_schedule(cdev);/* Start polling next device */ - return 1; /* return 1 -> More packets to process */ - } + desc->misc = 0; + desc->buf2 = 0; + desc->buflen = RX_MAX_PKTLEN; + desc->buf1 = DESC_ADDR(skb->data) | + DESC_OWN | (end ? DESC_EOR : 0); +} + +static void adm5120_switch_rx_refill(void) +{ + unsigned int entry; + + for (; cur_rxl - dirty_rxl > 0; dirty_rxl++) { + struct dma_desc *desc; + struct sk_buff *skb; + + entry = dirty_rxl % RX_RING_SIZE; + desc = &rxl_descs[entry]; + skb = rxl_skbuff[entry]; + if (skb == NULL) { + skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); + if (skb) { + skb_reserve(skb, SKB_RESERVE_LEN); + rxl_skbuff[entry] = skb; + } else { + SW_ERR("no memory for skb\n"); + desc->buflen = 0; + desc->buf2 = 0; + desc->misc = 0; + desc->buf1 = (desc->buf1 & DESC_EOR) | DESC_OWN; + break; + } } - skb = adm5120_skb_rxl[adm5120_rxli]; - len = (dma->status & ADM5120_DMA_LEN); - len >>= ADM5120_DMA_LENSHIFT; - len -= ETH_FCS; - priv = netdev_priv(dev); - if (len <= 0 || len > ADM5120_DMA_RXSIZE || - dma->status & ADM5120_DMA_FCSERR) { - priv->stats.rx_errors++; - skbn = NULL; - } else { - skbn = dev_alloc_skb(ADM5120_DMA_RXSIZE+16); - if (skbn) { - skb_put(skb, len); - skb->dev = dev; - skb->protocol = eth_type_trans(skb, dev); - skb->ip_summed = CHECKSUM_UNNECESSARY; - dev->last_rx = jiffies; - priv->stats.rx_packets++; - priv->stats.rx_bytes += len; - skb_reserve(skbn, NET_IP_ALIGN); - adm5120_skb_rxl[adm5120_rxli] = skbn; + desc->buf2 = 0; + desc->buflen = RX_MAX_PKTLEN; + desc->misc = 0; + desc->buf1 = (desc->buf1 & DESC_EOR) | DESC_OWN | + DESC_ADDR(skb->data); + } +} + +static int adm5120_switch_rx(int limit) +{ + unsigned int done = 0; + + SW_DBG("rx start, limit=%d, cur_rxl=%u, dirty_rxl=%u\n", + limit, cur_rxl, dirty_rxl); + + while (done < limit) { + int entry = cur_rxl % RX_RING_SIZE; + struct dma_desc *desc = &rxl_descs[entry]; + struct net_device *rdev; + unsigned int port; + + if (desc->buf1 & DESC_OWN) + break; + + if (dirty_rxl + RX_RING_SIZE == cur_rxl) + break; + + port = desc_get_srcport(desc); + rdev = adm5120_port[port]; + + SW_DBG("rx descriptor %u, desc=%p, skb=%p\n", entry, desc, + rxl_skbuff[entry]); + + if ((rdev) && netif_running(rdev)) { + struct sk_buff *skb = rxl_skbuff[entry]; + int pktlen; + + pktlen = desc_get_pktlen(desc); + pktlen -= ETH_CSUM_LEN; + + if ((pktlen == 0) || desc_ipcsum_fail(desc)) { + rdev->stats.rx_errors++; + if (pktlen == 0) + rdev->stats.rx_length_errors++; + if (desc_ipcsum_fail(desc)) + rdev->stats.rx_crc_errors++; + SW_DBG("rx error, recycling skb %u\n", entry); } else { - printk(KERN_INFO "%s recycling!\n", dev->name); + skb_put(skb, pktlen); + + skb->dev = rdev; + skb->protocol = eth_type_trans(skb, rdev); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + dma_cache_wback_inv((unsigned long)skb->data, + skb->len); + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + netif_receive_skb(skb); +#else + netif_rx(skb); +#endif + + rdev->last_rx = jiffies; + rdev->stats.rx_packets++; + rdev->stats.rx_bytes += pktlen; + + rxl_skbuff[entry] = NULL; + done++; } + } else { + SW_DBG("no rx device, recycling skb %u\n", entry); } -rx_skip: - adm5120_rx_dma_update(&adm5120_dma_rxl[adm5120_rxli], - adm5120_skb_rxl[adm5120_rxli], - (ADM5120_DMA_RXL-1==adm5120_rxli)); - if (ADM5120_DMA_RXL == ++adm5120_rxli) - adm5120_rxli = 0; - dma = &adm5120_dma_rxl[adm5120_rxli]; - if (skbn){ - netif_receive_skb(skb); - dev->quota--; - (*budget)--; - quota--; + + cur_rxl++; + if (cur_rxl - dirty_rxl > RX_RING_SIZE / 4) + adm5120_switch_rx_refill(); + } + + adm5120_switch_rx_refill(); + + SW_DBG("rx finished, cur_rxl=%u, dirty_rxl=%u, processed %d\n", + cur_rxl, dirty_rxl, done); + + return done; +} + +static void adm5120_switch_tx(void) +{ + unsigned int entry; + + spin_lock(&tx_lock); + entry = dirty_txl % TX_RING_SIZE; + while (dirty_txl != cur_txl) { + struct dma_desc *desc = &txl_descs[entry]; + struct sk_buff *skb = txl_skbuff[entry]; + + if (desc->buf1 & DESC_OWN) + break; + + if (netif_running(skb->dev)) { + skb->dev->stats.tx_bytes += skb->len; + skb->dev->stats.tx_packets++; } - } /* while */ - /* If there are still packets to process, return 1 */ - if (quota){ - /* No more packets to process, so disable the polling and reenable the interrupts */ - netif_rx_complete(dev); - adm5120_set_reg(ADM5120_INT_MASK, - adm5120_get_reg(ADM5120_INT_MASK) & - ~(ADM5120_INT_RXL|ADM5120_INT_LFULL)); - return 0; + dev_kfree_skb_irq(skb); + txl_skbuff[entry] = NULL; + entry = (++dirty_txl) % TX_RING_SIZE; + } + if ((cur_txl - dirty_txl) < TX_QUEUE_LEN - 4) { + int i; + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if (!adm5120_devs[i]) + continue; + netif_wake_queue(adm5120_devs[i]); + } } + spin_unlock(&tx_lock); +} + +#ifdef CONFIG_ADM5120_SWITCH_NAPI +static int adm5120_if_poll(struct napi_struct *napi, int limit) +{ + struct adm5120_if_priv *priv = container_of(napi, + struct adm5120_if_priv, napi); + struct net_device *dev = priv->dev; + int done; + u32 status; + + sw_int_ack(SWITCH_INTS_POLL); + + SW_DBG("%s: processing TX ring\n", dev->name); + adm5120_switch_tx(); + + SW_DBG("%s: processing RX ring\n", dev->name); + done = adm5120_switch_rx(limit); + + status = sw_int_status() & SWITCH_INTS_POLL; + if ((done < limit) && (!status)) { + SW_DBG("disable polling mode for %s\n", dev->name); + napi_complete(napi); + sw_int_unmask(SWITCH_INTS_POLL); + return 0; + } + + SW_DBG("%s still in polling mode, done=%d, status=%x\n", + dev->name, done, status); return 1; } +#endif /* CONFIG_ADM5120_SWITCH_NAPI */ + -static irqreturn_t adm5120_sw_irq(int irq, void *dev_id) +static irqreturn_t adm5120_switch_irq(int irq, void *dev_id) { - unsigned long intreg, intmask; - int port; - struct net_device *dev; + u32 status; + + status = sw_int_status(); + status &= SWITCH_INTS_ALL; + if (!status) + return IRQ_NONE; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + sw_int_ack(status & ~SWITCH_INTS_POLL); + + if (status & SWITCH_INTS_POLL) { + struct net_device *dev = dev_id; + struct adm5120_if_priv *priv = netdev_priv(dev); + + sw_dump_intr_mask("poll ints", status); + SW_DBG("enable polling mode for %s\n", dev->name); + sw_int_mask(SWITCH_INTS_POLL); + napi_schedule(&priv->napi); + } +#else + sw_int_ack(status); - intmask = adm5120_get_reg(ADM5120_INT_MASK); /* Remember interrupt mask */ - adm5120_set_reg(ADM5120_INT_MASK, ADM5120_INTMASKALL); /* Disable interrupts */ - - intreg = adm5120_get_reg(ADM5120_INT_ST); /* Read interrupt status */ - adm5120_set_reg(ADM5120_INT_ST, intreg); /* Clear interrupt status */ - - /* In NAPI operation the interrupts are disabled and the polling mechanism - * is activated. The interrupts are finally enabled again in the polling routine. - */ - if (intreg & (ADM5120_INT_RXL|ADM5120_INT_LFULL)) { - /* check rx buffer for port number */ - port = adm5120_dma_rxl[adm5120_rxli].status & ADM5120_DMA_PORTID; - port >>= ADM5120_DMA_PORTSHIFT; - dev = adm5120_port[port]; - if ((dev==NULL) || !netif_running(dev)) { - /* discard (update with old skb) */ - adm5120_rx_dma_update(&adm5120_dma_rxl[adm5120_rxli], - adm5120_skb_rxl[adm5120_rxli], - (ADM5120_DMA_RXL-1==adm5120_rxli)); - if (ADM5120_DMA_RXL == ++adm5120_rxli) - adm5120_rxli = 0; + if (status & (SWITCH_INT_RLD | SWITCH_INT_LDF)) + adm5120_switch_rx(RX_RING_SIZE); + + if (status & SWITCH_INT_SLD) + adm5120_switch_tx(); +#endif + + return IRQ_HANDLED; +} + +static void adm5120_set_bw(char *matrix) +{ + unsigned long val; + + /* Port 0 to 3 are set using the bandwidth control 0 register */ + val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24); + sw_write_reg(SWITCH_REG_BW_CNTL0, val); + + /* Port 4 and 5 are set using the bandwidth control 1 register */ + val = matrix[4]; + if (matrix[5] == 1) + sw_write_reg(SWITCH_REG_BW_CNTL1, val | 0x80000000); + else + sw_write_reg(SWITCH_REG_BW_CNTL1, val & ~0x8000000); + + SW_DBG("D: ctl0 0x%ux, ctl1 0x%ux\n", sw_read_reg(SWITCH_REG_BW_CNTL0), + sw_read_reg(SWITCH_REG_BW_CNTL1)); +} + +static void adm5120_switch_tx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + memset(desc, 0, num * sizeof(*desc)); + desc[num-1].buf1 |= DESC_EOR; + memset(skbl, 0, sizeof(struct skb *) * num); + + cur_txl = 0; + dirty_txl = 0; +} + +static void adm5120_switch_rx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + int i; + + memset(desc, 0, num * sizeof(*desc)); + for (i = 0; i < num; i++) { + skbl[i] = dev_alloc_skb(SKB_ALLOC_LEN); + if (!skbl[i]) { + i = num; + break; } - else { - netif_rx_schedule(dev); - intmask |= (ADM5120_INT_RXL|ADM5120_INT_LFULL); /* Disable RX interrupts */ + skb_reserve(skbl[i], SKB_RESERVE_LEN); + adm5120_rx_dma_update(&desc[i], skbl[i], (num - 1 == i)); + } + + cur_rxl = 0; + dirty_rxl = 0; +} + +static int adm5120_switch_tx_ring_alloc(void) +{ + int err; + + txl_descs = dma_alloc_coherent(NULL, TX_DESCS_SIZE, &txl_descs_dma, + GFP_ATOMIC); + if (!txl_descs) { + err = -ENOMEM; + goto err; + } + + txl_skbuff = kzalloc(TX_SKBS_SIZE, GFP_KERNEL); + if (!txl_skbuff) { + err = -ENOMEM; + goto err; + } + + return 0; + +err: + return err; +} + +static void adm5120_switch_tx_ring_free(void) +{ + int i; + + if (txl_skbuff) { + for (i = 0; i < TX_RING_SIZE; i++) + if (txl_skbuff[i]) + kfree_skb(txl_skbuff[i]); + kfree(txl_skbuff); + } + + if (txl_descs) + dma_free_coherent(NULL, TX_DESCS_SIZE, txl_descs, + txl_descs_dma); +} + +static int adm5120_switch_rx_ring_alloc(void) +{ + int err; + int i; + + /* init RX ring */ + rxl_descs = dma_alloc_coherent(NULL, RX_DESCS_SIZE, &rxl_descs_dma, + GFP_ATOMIC); + if (!rxl_descs) { + err = -ENOMEM; + goto err; + } + + rxl_skbuff = kzalloc(RX_SKBS_SIZE, GFP_KERNEL); + if (!rxl_skbuff) { + err = -ENOMEM; + goto err; + } + + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb; + skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); + if (!skb) { + err = -ENOMEM; + goto err; } + rxl_skbuff[i] = skb; + skb_reserve(skb, SKB_RESERVE_LEN); } -#ifdef CONFIG_DEBUG - if (intreg & ~(intmask)) - printk(KERN_INFO "adm5120sw: IRQ 0x%08X unexpected!\n", (unsigned int)(intreg & ~(intmask))); -#endif - adm5120_set_reg(ADM5120_INT_MASK, intmask); + return 0; - return IRQ_HANDLED; +err: + return err; +} + +static void adm5120_switch_rx_ring_free(void) +{ + int i; + + if (rxl_skbuff) { + for (i = 0; i < RX_RING_SIZE; i++) + if (rxl_skbuff[i]) + kfree_skb(rxl_skbuff[i]); + kfree(rxl_skbuff); + } + + if (rxl_descs) + dma_free_coherent(NULL, RX_DESCS_SIZE, rxl_descs, + rxl_descs_dma); +} + +static void adm5120_write_mac(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + unsigned char *mac = dev->dev_addr; + u32 t; + + t = mac[2] | (mac[3] << MAC_WT1_MAC3_SHIFT) | + (mac[4] << MAC_WT1_MAC4_SHIFT) | (mac[5] << MAC_WT1_MAC5_SHIFT); + sw_write_reg(SWITCH_REG_MAC_WT1, t); + + t = (mac[0] << MAC_WT0_MAC0_SHIFT) | (mac[1] << MAC_WT0_MAC1_SHIFT) | + MAC_WT0_MAWC | MAC_WT0_WVE | (priv->vlan_no<<3); + + sw_write_reg(SWITCH_REG_MAC_WT0, t); + + while (!(sw_read_reg(SWITCH_REG_MAC_WT0) & MAC_WT0_MWD)) + ; } static void adm5120_set_vlan(char *matrix) @@ -212,414 +729,484 @@ static void adm5120_set_vlan(char *matrix) int vlan_port, port; val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24); - adm5120_set_reg(ADM5120_VLAN_GI, val); + sw_write_reg(SWITCH_REG_VLAN_G1, val); val = matrix[4] + (matrix[5]<<8); - adm5120_set_reg(ADM5120_VLAN_GII, val); + sw_write_reg(SWITCH_REG_VLAN_G2, val); + /* Now set/update the port vs. device lookup table */ - for (port=0; portnapi); +} + +static inline void adm5120_if_napi_disable(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + napi_disable(&priv->napi); +} +#else +static inline void adm5120_if_napi_enable(struct net_device *dev) {} +static inline void adm5120_if_napi_disable(struct net_device *dev) {} +#endif /* CONFIG_ADM5120_SWITCH_NAPI */ + +static int adm5120_if_open(struct net_device *dev) +{ + u32 t; + int err; int i; - netif_start_queue(dev); - if (!adm5120_if_open++) { - /* enable interrupts on first open */ - adm5120_set_reg(ADM5120_INT_MASK, - adm5120_get_reg(ADM5120_INT_MASK) & - ~(ADM5120_INT_RXL|ADM5120_INT_LFULL)); + adm5120_if_napi_enable(dev); + + err = request_irq(dev->irq, adm5120_switch_irq, IRQF_SHARED, + dev->name, dev); + if (err) { + SW_ERR("unable to get irq for %s\n", dev->name); + goto err; } + + if (!sw_used++) + /* enable interrupts on first open */ + sw_int_unmask(SWITCH_INTS_USED); + /* enable (additional) port */ - val = adm5120_get_reg(ADM5120_PORT_CONF0); - for (i=0; iirq, dev); + return 0; } -static int adm5120_sw_tx(struct sk_buff *skb, struct net_device *dev) +static int adm5120_if_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) { - struct adm5120_dma *dma; - struct sk_buff **skbl = adm5120_skb_txl; - struct adm5120_sw *priv = netdev_priv(dev); + struct dma_desc *desc; + struct adm5120_if_priv *priv = netdev_priv(dev); + unsigned int entry; unsigned long data; + int i; - dev->trans_start = jiffies; - dma = &adm5120_dma_txl[adm5120_txli]; - if (dma->data & ADM5120_DMA_OWN) { + /* lock switch irq */ + spin_lock_irq(&tx_lock); + + /* calculate the next TX descriptor entry. */ + entry = cur_txl % TX_RING_SIZE; + + desc = &txl_descs[entry]; + if (desc->buf1 & DESC_OWN) { /* We want to write a packet but the TX queue is still * occupied by the DMA. We are faster than the DMA... */ + SW_DBG("%s unable to transmit, packet dopped\n", dev->name); dev_kfree_skb(skb); - priv->stats.tx_dropped++; + dev->stats.tx_dropped++; return 0; } - data = ADM5120_DMA_ADDR(skb->data) | ADM5120_DMA_OWN; - if (adm5120_txli == ADM5120_DMA_TXL-1) - data |= ADM5120_DMA_RINGEND; - dma->status = - ((skb->lenlen) << ADM5120_DMA_LENSHIFT) | - (0x1 << priv->port); - - dma->len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; - priv->stats.tx_packets++; - priv->stats.tx_bytes += skb->len; - - /* free old skbs here instead of tx completion interrupt: - * will hold some more memory allocated but reduces interrupts */ - if (skbl[adm5120_txli]){ - dev_kfree_skb(skbl[adm5120_txli]); - } - skbl[adm5120_txli] = skb; - dma->data = data; /* Here we enable the buffer for the TX DMA machine */ - adm5120_set_reg(ADM5120_SEND_TRIG, ADM5120_SEND_TRIG_L); - if (++adm5120_txli == ADM5120_DMA_TXL) - adm5120_txli = 0; - return 0; -} + txl_skbuff[entry] = skb; + data = (desc->buf1 & DESC_EOR); + data |= DESC_ADDR(skb->data); -static void adm5120_tx_timeout(struct net_device *dev) -{ - printk(KERN_INFO "%s: TX timeout\n",dev->name); -} + desc->misc = + ((skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len) << DESC_PKTLEN_SHIFT) | + (0x1 << priv->vlan_no); -static struct net_device_stats *adm5120_sw_stats(struct net_device *dev) -{ - struct adm5120_sw *priv = netdev_priv(dev); - int portmask; - unsigned long adm5120_cpup_conf_reg; + desc->buflen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; - portmask = adm5120_eth_vlans[priv->port] & 0x3f; + desc->buf1 = data | DESC_OWN; + sw_write_reg(SWITCH_REG_SEND_TRIG, SEND_TRIG_STL); - adm5120_cpup_conf_reg = adm5120_get_reg(ADM5120_CPUP_CONF); + cur_txl++; + if (cur_txl == dirty_txl + TX_QUEUE_LEN) { + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if (!adm5120_devs[i]) + continue; + netif_stop_queue(adm5120_devs[i]); + } + } - if (dev->flags & IFF_PROMISC) - adm5120_cpup_conf_reg &= ~((portmask << ADM5120_DISUNSHIFT) & ADM5120_DISUNALL); - else - adm5120_cpup_conf_reg |= (portmask << ADM5120_DISUNSHIFT); + dev->trans_start = jiffies; - if (dev->flags & IFF_PROMISC || dev->flags & IFF_ALLMULTI || dev->mc_count) - adm5120_cpup_conf_reg &= ~((portmask << ADM5120_DISMCSHIFT) & ADM5120_DISMCALL); - else - adm5120_cpup_conf_reg |= (portmask << ADM5120_DISMCSHIFT); - - /* If there is any port configured to be in promiscuous mode, then the */ - /* Bridge Test Mode has to be activated. This will result in */ - /* transporting also packets learned in another VLAN to be forwarded */ - /* to the CPU. */ - /* The difficult scenario is when we want to build a bridge on the CPU.*/ - /* Assume we have port0 and the CPU port in VLAN0 and port1 and the */ - /* CPU port in VLAN1. Now we build a bridge on the CPU between */ - /* VLAN0 and VLAN1. Both ports of the VLANs are set in promisc mode. */ - /* Now assume a packet with ethernet source address 99 enters port 0 */ - /* It will be forwarded to the CPU because it is unknown. Then the */ - /* bridge in the CPU will send it to VLAN1 and it goes out at port 1. */ - /* When now a packet with ethernet destination address 99 comes in at */ - /* port 1 in VLAN1, then the switch has learned that this address is */ - /* located at port 0 in VLAN0. Therefore the switch will drop */ - /* this packet. In order to avoid this and to send the packet still */ - /* to the CPU, the Bridge Test Mode has to be activated. */ - - /* Check if there is any vlan in promisc mode. */ - if (~adm5120_cpup_conf_reg & ADM5120_DISUNALL) - adm5120_cpup_conf_reg |= ADM5120_BTM; /* Set the BTM */ - else - adm5120_cpup_conf_reg &= ~ADM5120_BTM; /* Disable the BTM */ + spin_unlock_irq(&tx_lock); - adm5120_set_reg(ADM5120_CPUP_CONF,adm5120_cpup_conf_reg); + return 0; +} - return &((struct adm5120_sw *)netdev_priv(dev))->stats; +static void adm5120_if_tx_timeout(struct net_device *dev) +{ + SW_INFO("TX timeout on %s\n", dev->name); } -static void adm5120_set_multicast_list(struct net_device *dev) +static void adm5120_if_set_multicast_list(struct net_device *dev) { - struct adm5120_sw *priv = netdev_priv(dev); - int portmask; + struct adm5120_if_priv *priv = netdev_priv(dev); + u32 ports; + u32 t; - portmask = adm5120_eth_vlans[priv->port] & 0x3f; + ports = adm5120_eth_vlans[priv->vlan_no] & SWITCH_PORTS_NOCPU; + t = sw_read_reg(SWITCH_REG_CPUP_CONF); if (dev->flags & IFF_PROMISC) - adm5120_set_reg(ADM5120_CPUP_CONF, - adm5120_get_reg(ADM5120_CPUP_CONF) & - ~((portmask << ADM5120_DISUNSHIFT) & ADM5120_DISUNALL)); + /* enable unknown packets */ + t &= ~(ports << CPUP_CONF_DUNP_SHIFT); else - adm5120_set_reg(ADM5120_CPUP_CONF, - adm5120_get_reg(ADM5120_CPUP_CONF) | - (portmask << ADM5120_DISUNSHIFT)); + /* disable unknown packets */ + t |= (ports << CPUP_CONF_DUNP_SHIFT); if (dev->flags & IFF_PROMISC || dev->flags & IFF_ALLMULTI || - dev->mc_count) - adm5120_set_reg(ADM5120_CPUP_CONF, - adm5120_get_reg(ADM5120_CPUP_CONF) & - ~((portmask << ADM5120_DISMCSHIFT) & ADM5120_DISMCALL)); + dev->mc_count) + /* enable multicast packets */ + t &= ~(ports << CPUP_CONF_DMCP_SHIFT); else - adm5120_set_reg(ADM5120_CPUP_CONF, - adm5120_get_reg(ADM5120_CPUP_CONF) | - (portmask << ADM5120_DISMCSHIFT)); -} - -static void adm5120_write_mac(struct net_device *dev) -{ - struct adm5120_sw *priv = netdev_priv(dev); - unsigned char *mac = dev->dev_addr; + /* disable multicast packets */ + t |= (ports << CPUP_CONF_DMCP_SHIFT); + + /* If there is any port configured to be in promiscuous mode, then the */ + /* Bridge Test Mode has to be activated. This will result in */ + /* transporting also packets learned in another VLAN to be forwarded */ + /* to the CPU. */ + /* The difficult scenario is when we want to build a bridge on the CPU.*/ + /* Assume we have port0 and the CPU port in VLAN0 and port1 and the */ + /* CPU port in VLAN1. Now we build a bridge on the CPU between */ + /* VLAN0 and VLAN1. Both ports of the VLANs are set in promisc mode. */ + /* Now assume a packet with ethernet source address 99 enters port 0 */ + /* It will be forwarded to the CPU because it is unknown. Then the */ + /* bridge in the CPU will send it to VLAN1 and it goes out at port 1. */ + /* When now a packet with ethernet destination address 99 comes in at */ + /* port 1 in VLAN1, then the switch has learned that this address is */ + /* located at port 0 in VLAN0. Therefore the switch will drop */ + /* this packet. In order to avoid this and to send the packet still */ + /* to the CPU, the Bridge Test Mode has to be activated. */ + + /* Check if there is any vlan in promisc mode. */ + if (~t & (SWITCH_PORTS_NOCPU << CPUP_CONF_DUNP_SHIFT)) + t |= CPUP_CONF_BTM; /* Enable Bridge Testing Mode */ + else + t &= ~CPUP_CONF_BTM; /* Disable Bridge Testing Mode */ - adm5120_set_reg(ADM5120_MAC_WT1, - mac[2] | (mac[3]<<8) | (mac[4]<<16) | (mac[5]<<24)); - adm5120_set_reg(ADM5120_MAC_WT0, (priv->port<<3) | - (mac[0]<<16) | (mac[1]<<24) | ADM5120_MAC_WRITE | ADM5120_VLAN_EN); + sw_write_reg(SWITCH_REG_CPUP_CONF, t); - while (!(adm5120_get_reg(ADM5120_MAC_WT0) & ADM5120_MAC_WRITE_DONE)); } -static int adm5120_sw_set_mac_address(struct net_device *dev, void *p) +static int adm5120_if_set_mac_address(struct net_device *dev, void *p) { - struct sockaddr *addr = p; + int ret; + + ret = eth_mac_addr(dev, p); + if (ret) + return ret; - memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); adm5120_write_mac(dev); return 0; } -static int adm5120_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +static int adm5120_if_do_ioctl(struct net_device *dev, struct ifreq *rq, + int cmd) { int err; struct adm5120_sw_info info; - struct adm5120_sw *priv = netdev_priv(dev); - - switch(cmd) { - case SIOCGADMINFO: - info.magic = 0x5120; - info.ports = adm5120_nrdevs; - info.vlan = priv->port; - err = copy_to_user(rq->ifr_data, &info, sizeof(info)); - if (err) - return -EFAULT; - break; - case SIOCSMATRIX: - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - err = copy_from_user(adm5120_eth_vlans, rq->ifr_data, - sizeof(adm5120_eth_vlans)); - if (err) - return -EFAULT; - adm5120_set_vlan(adm5120_eth_vlans); - break; - case SIOCGMATRIX: - err = copy_to_user(rq->ifr_data, adm5120_eth_vlans, - sizeof(adm5120_eth_vlans)); - if (err) - return -EFAULT; - break; - case SIOCGETBW: - err = copy_to_user(rq->ifr_data, bw_matrix, sizeof(bw_matrix)); - if (err) - return -EFAULT; - break; - case SIOCSETBW: - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - err = copy_from_user(bw_matrix, rq->ifr_data, sizeof(bw_matrix)); - if (err) - return -EFAULT; - adm5120_set_bw(bw_matrix); - break; - default: - return -EOPNOTSUPP; + struct adm5120_if_priv *priv = netdev_priv(dev); + + switch (cmd) { + case SIOCGADMINFO: + info.magic = 0x5120; + info.ports = adm5120_nrdevs; + info.vlan = priv->vlan_no; + err = copy_to_user(rq->ifr_data, &info, sizeof(info)); + if (err) + return -EFAULT; + break; + case SIOCSMATRIX: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = copy_from_user(adm5120_eth_vlans, rq->ifr_data, + sizeof(adm5120_eth_vlans)); + if (err) + return -EFAULT; + adm5120_set_vlan(adm5120_eth_vlans); + break; + case SIOCGMATRIX: + err = copy_to_user(rq->ifr_data, adm5120_eth_vlans, + sizeof(adm5120_eth_vlans)); + if (err) + return -EFAULT; + break; + default: + return -EOPNOTSUPP; } return 0; } -static void adm5120_dma_tx_init(struct adm5120_dma *dma, struct sk_buff **skbl, - int num) +static const struct net_device_ops adm5120sw_netdev_ops = { + .ndo_open = adm5120_if_open, + .ndo_stop = adm5120_if_stop, + .ndo_start_xmit = adm5120_if_hard_start_xmit, + .ndo_set_multicast_list = adm5120_if_set_multicast_list, + .ndo_do_ioctl = adm5120_if_do_ioctl, + .ndo_tx_timeout = adm5120_if_tx_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = adm5120_if_set_mac_address, +}; + +static struct net_device *adm5120_if_alloc(void) { - memset(dma, 0, sizeof(struct adm5120_dma)*num); - dma[num-1].data |= ADM5120_DMA_RINGEND; - memset(skbl, 0, sizeof(struct skb*)*num); + struct net_device *dev; + struct adm5120_if_priv *priv; + + dev = alloc_etherdev(sizeof(*priv)); + if (!dev) + return NULL; + + priv = netdev_priv(dev); + priv->dev = dev; + + dev->irq = ADM5120_IRQ_SWITCH; + dev->netdev_ops = &adm5120sw_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + netif_napi_add(dev, &priv->napi, adm5120_if_poll, 64); +#endif + + return dev; } -static void adm5120_dma_rx_init(struct adm5120_dma *dma, struct sk_buff **skbl, - int num) +/* ------------------------------------------------------------------------ */ + +static void adm5120_switch_cleanup(void) { int i; - memset(dma, 0, sizeof(struct adm5120_dma)*num); - for (i=0; iport = i; - dev->base_addr = SW_BASE; - dev->irq = ADM5120_IRQ_SWITCH; - dev->open = adm5120_sw_open; - dev->hard_start_xmit = adm5120_sw_tx; - dev->stop = adm5120_sw_stop; - dev->get_stats = adm5120_sw_stats; - dev->set_multicast_list = adm5120_set_multicast_list; - dev->do_ioctl = adm5120_do_ioctl; - dev->tx_timeout = adm5120_tx_timeout; - dev->watchdog_timeo = ETH_TX_TIMEOUT; - dev->set_mac_address = adm5120_sw_set_mac_address; - dev->poll = adm5120_rx; - dev->weight = 64; + adm5120_devs[i] = dev; + priv = netdev_priv(dev); + + priv->vlan_no = i; + priv->port_mask = adm5120_eth_vlans[i]; memcpy(dev->dev_addr, adm5120_eth_macs[i], 6); adm5120_write_mac(dev); - if ((err = register_netdev(dev))) { - free_netdev(dev); - goto out_int; + err = register_netdev(dev); + if (err) { + SW_INFO("%s register failed, error=%d\n", + dev->name, err); + goto err; } - printk(KERN_INFO "%s: ADM5120 switch port%d\n", dev->name, i); } + /* setup vlan/port mapping after devs are filled up */ adm5120_set_vlan(adm5120_eth_vlans); - adm5120_set_reg(ADM5120_CPUP_CONF, - ADM5120_CRC_PADDING | ADM5120_DISUNALL | ADM5120_DISMCALL); + /* enable CPU port */ + t = sw_read_reg(SWITCH_REG_CPUP_CONF); + t &= ~CPUP_CONF_DCPUP; + sw_write_reg(SWITCH_REG_CPUP_CONF, t); return 0; -out_int: - /* Undo everything that did succeed */ - for (; i; i--) { - unregister_netdev(adm5120_devs[i-1]); - free_netdev(adm5120_devs[i-1]); - } - free_irq(ADM5120_IRQ_SWITCH, NULL); -out: - printk(KERN_ERR "ADM5120 Ethernet switch init failed\n"); +err: + adm5120_switch_cleanup(); + + SW_ERR("init failed\n"); return err; } -static void __exit adm5120_sw_exit(void) +static int adm5120_switch_remove(struct platform_device *dev) { - int i; + adm5120_switch_cleanup(); + return 0; +} - for (i = 0; i < SW_DEVS; i++) { - unregister_netdev(adm5120_devs[i]); - free_netdev(adm5120_devs[i]); - } +static struct platform_driver adm5120_switch_driver = { + .probe = adm5120_switch_probe, + .remove = adm5120_switch_remove, + .driver = { + .name = DRV_NAME, + }, +}; - free_irq(ADM5120_IRQ_SWITCH, NULL); +/* -------------------------------------------------------------------------- */ - for (i = 0; i < ADM5120_DMA_RXH; i++) { - if (!adm5120_skb_rxh[i]) - break; - kfree_skb(adm5120_skb_rxh[i]); - } - for (i = 0; i < ADM5120_DMA_RXL; i++) { - if (!adm5120_skb_rxl[i]) - break; - kfree_skb(adm5120_skb_rxl[i]); - } +static int __init adm5120_switch_mod_init(void) +{ + int err; + + pr_info(DRV_DESC " version " DRV_VERSION "\n"); + err = platform_driver_register(&adm5120_switch_driver); + + return err; } -module_init(adm5120_sw_init); -module_exit(adm5120_sw_exit); +static void __exit adm5120_switch_mod_exit(void) +{ + platform_driver_unregister(&adm5120_switch_driver); +} + +module_init(adm5120_switch_mod_init); +module_exit(adm5120_switch_mod_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gabor Juhos "); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_VERSION(DRV_VERSION);