diff options
Diffstat (limited to 'target/linux/adm5120/files/drivers/net/adm5120sw.c')
| -rw-r--r-- | target/linux/adm5120/files/drivers/net/adm5120sw.c | 1219 |
1 files changed, 0 insertions, 1219 deletions
diff --git a/target/linux/adm5120/files/drivers/net/adm5120sw.c b/target/linux/adm5120/files/drivers/net/adm5120sw.c deleted file mode 100644 index 7fbabb0..0000000 --- a/target/linux/adm5120/files/drivers/net/adm5120sw.c +++ /dev/null @@ -1,1219 +0,0 @@ -/* - * ADM5120 built-in ethernet switch driver - * - * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> - * - * 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. - * - * 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 <linux/kernel.h> -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/spinlock.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/irq.h> - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> - -#include <asm/mipsregs.h> - -#include <asm/mach-adm5120/adm5120_info.h> -#include <asm/mach-adm5120/adm5120_defs.h> -#include <asm/mach-adm5120/adm5120_switch.h> - -#include "adm5120sw.h" -#include <linux/dma-mapping.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_DEBUG "%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 - -#define TX_RING_SIZE 32 -#define TX_QUEUE_LEN 28 /* Limit ring entries actually used. */ -#define TX_TIMEOUT (HZ * 400) - -#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[SWITCH_NUM_PORTS]; -/* Lookup table port -> device */ -static struct net_device *adm5120_port[SWITCH_NUM_PORTS]; - -static struct dma_desc *txl_descs; -static struct dma_desc *rxl_descs; - -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 DEFINE_SPINLOCK(tx_lock); - -/* ------------------------------------------------------------------------ */ - -static inline u32 sw_read_reg(u32 reg) -{ - return __raw_readl((void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); -} - -static inline void sw_write_reg(u32 reg, u32 val) -{ - __raw_writel(val, (void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); -} - -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); -} - -/* ------------------------------------------------------------------------ */ - -#ifdef CONFIG_ADM5120_SWITCH_DEBUG -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); -} -#else -static inline void sw_dump_desc(char *label, struct dma_desc *desc, int tx) {} -static void sw_dump_intr_mask(char *label, u32 mask) {} -static inline void sw_dump_regs(void) {} -#endif /* CONFIG_ADM5120_SWITCH_DEBUG */ - -/* ------------------------------------------------------------------------ */ - -static inline void adm5120_rx_dma_update(struct dma_desc *desc, - struct sk_buff *skb, int end) -{ - 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; - } - } - - 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 { - 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); - } - - 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++; - } - - 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 __maybe_unused = 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_switch_irq(int irq, void *dev_id) -{ - 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); - - 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; - } - 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); - } - - return 0; - -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) -{ - unsigned long val; - int vlan_port, port; - - val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24); - sw_write_reg(SWITCH_REG_VLAN_G1, val); - val = matrix[4] + (matrix[5]<<8); - sw_write_reg(SWITCH_REG_VLAN_G2, val); - - /* Now set/update the port vs. device lookup table */ - for (port = 0; port < SWITCH_NUM_PORTS; port++) { - for (vlan_port = 0; vlan_port < SWITCH_NUM_PORTS && !(matrix[vlan_port] & (0x00000001 << port)); vlan_port++) - ; - if (vlan_port < SWITCH_NUM_PORTS) - adm5120_port[port] = adm5120_devs[vlan_port]; - else - adm5120_port[port] = NULL; - } -} - -static void adm5120_switch_set_vlan_mac(unsigned int vlan, unsigned char *mac) -{ - 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 | (vlan << MAC_WT0_WVN_SHIFT) | - (MAC_WT0_WAF_STATIC << MAC_WT0_WAF_SHIFT); - sw_write_reg(SWITCH_REG_MAC_WT0, t); - - do { - t = sw_read_reg(SWITCH_REG_MAC_WT0); - } while ((t & MAC_WT0_MWD) == 0); -} - -static void adm5120_switch_set_vlan_ports(unsigned int vlan, u32 ports) -{ - unsigned int reg; - u32 t; - - if (vlan < 4) - reg = SWITCH_REG_VLAN_G1; - else { - vlan -= 4; - reg = SWITCH_REG_VLAN_G2; - } - - t = sw_read_reg(reg); - t &= ~(0xFF << (vlan*8)); - t |= (ports << (vlan*8)); - sw_write_reg(reg, t); -} - -/* ------------------------------------------------------------------------ */ - -#ifdef CONFIG_ADM5120_SWITCH_NAPI -static inline void adm5120_if_napi_enable(struct net_device *dev) -{ - struct adm5120_if_priv *priv = netdev_priv(dev); - napi_enable(&priv->napi); -} - -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; - - 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 */ - t = sw_read_reg(SWITCH_REG_PORT_CONF0); - for (i = 0; i < SWITCH_NUM_PORTS; i++) { - if (dev == adm5120_devs[i]) - t &= ~adm5120_eth_vlans[i]; - } - sw_write_reg(SWITCH_REG_PORT_CONF0, t); - - netif_start_queue(dev); - - return 0; - -err: - adm5120_if_napi_disable(dev); - return err; -} - -static int adm5120_if_stop(struct net_device *dev) -{ - u32 t; - int i; - - netif_stop_queue(dev); - adm5120_if_napi_disable(dev); - - /* disable port if not assigned to other devices */ - t = sw_read_reg(SWITCH_REG_PORT_CONF0); - t |= SWITCH_PORTS_NOCPU; - for (i = 0; i < SWITCH_NUM_PORTS; i++) { - if ((dev != adm5120_devs[i]) && netif_running(adm5120_devs[i])) - t &= ~adm5120_eth_vlans[i]; - } - sw_write_reg(SWITCH_REG_PORT_CONF0, t); - - if (!--sw_used) - sw_int_mask(SWITCH_INTS_USED); - - free_irq(dev->irq, dev); - - return 0; -} - -static int adm5120_if_hard_start_xmit(struct sk_buff *skb, - struct net_device *dev) -{ - struct dma_desc *desc; - struct adm5120_if_priv *priv = netdev_priv(dev); - unsigned int entry; - unsigned long data; - int i; - - /* 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); - dev->stats.tx_dropped++; - return 0; - } - - txl_skbuff[entry] = skb; - data = (desc->buf1 & DESC_EOR); - data |= DESC_ADDR(skb->data); - - desc->misc = - ((skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len) << DESC_PKTLEN_SHIFT) | - (0x1 << priv->vlan_no); - - desc->buflen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; - - desc->buf1 = data | DESC_OWN; - sw_write_reg(SWITCH_REG_SEND_TRIG, SEND_TRIG_STL); - - 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]); - } - } - - dev->trans_start = jiffies; - - spin_unlock_irq(&tx_lock); - - return 0; -} - -static void adm5120_if_tx_timeout(struct net_device *dev) -{ - SW_INFO("TX timeout on %s\n", dev->name); -} - -static void adm5120_if_set_rx_mode(struct net_device *dev) -{ - struct adm5120_if_priv *priv = netdev_priv(dev); - u32 ports; - u32 t; - - ports = adm5120_eth_vlans[priv->vlan_no] & SWITCH_PORTS_NOCPU; - - t = sw_read_reg(SWITCH_REG_CPUP_CONF); - if (dev->flags & IFF_PROMISC) - /* enable unknown packets */ - t &= ~(ports << CPUP_CONF_DUNP_SHIFT); - else - /* disable unknown packets */ - t |= (ports << CPUP_CONF_DUNP_SHIFT); - - if (dev->flags & IFF_PROMISC || dev->flags & IFF_ALLMULTI || - netdev_mc_count(dev)) - /* enable multicast packets */ - t &= ~(ports << CPUP_CONF_DMCP_SHIFT); - else - /* 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 */ - - sw_write_reg(SWITCH_REG_CPUP_CONF, t); - -} - -static int adm5120_if_set_mac_address(struct net_device *dev, void *p) -{ - int ret; - - ret = eth_mac_addr(dev, p); - if (ret) - return ret; - - adm5120_write_mac(dev); - return 0; -} - -static int adm5120_if_do_ioctl(struct net_device *dev, struct ifreq *rq, - int cmd) -{ - int err; - struct adm5120_sw_info info; - 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 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_rx_mode = adm5120_if_set_rx_mode, - .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) -{ - 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_switch_cleanup(void) -{ - int i; - - /* disable interrupts */ - sw_int_mask(SWITCH_INTS_ALL); - - for (i = 0; i < SWITCH_NUM_PORTS; i++) { - struct net_device *dev = adm5120_devs[i]; - if (dev) { - unregister_netdev(dev); - free_netdev(dev); - } - } - - adm5120_switch_tx_ring_free(); - adm5120_switch_rx_ring_free(); -} - -static int adm5120_switch_probe(struct platform_device *pdev) -{ - u32 t; - int i, err; - - adm5120_nrdevs = adm5120_eth_num_ports; - - t = CPUP_CONF_DCPUP | CPUP_CONF_CRCP | - SWITCH_PORTS_NOCPU << CPUP_CONF_DUNP_SHIFT | - SWITCH_PORTS_NOCPU << CPUP_CONF_DMCP_SHIFT ; - sw_write_reg(SWITCH_REG_CPUP_CONF, t); - - t = (SWITCH_PORTS_NOCPU << PORT_CONF0_EMCP_SHIFT) | - (SWITCH_PORTS_NOCPU << PORT_CONF0_BP_SHIFT) | - (SWITCH_PORTS_NOCPU); - sw_write_reg(SWITCH_REG_PORT_CONF0, t); - - /* setup ports to Autoneg/100M/Full duplex/Auto MDIX */ - t = SWITCH_PORTS_PHY | - (SWITCH_PORTS_PHY << PHY_CNTL2_SC_SHIFT) | - (SWITCH_PORTS_PHY << PHY_CNTL2_DC_SHIFT) | - (SWITCH_PORTS_PHY << PHY_CNTL2_PHYR_SHIFT) | - (SWITCH_PORTS_PHY << PHY_CNTL2_AMDIX_SHIFT) | - PHY_CNTL2_RMAE; - sw_write_reg(SWITCH_REG_PHY_CNTL2, t); - - t = sw_read_reg(SWITCH_REG_PHY_CNTL3); - t |= PHY_CNTL3_RNT; - sw_write_reg(SWITCH_REG_PHY_CNTL3, t); - - /* Force all the packets from all ports are low priority */ - sw_write_reg(SWITCH_REG_PRI_CNTL, 0); - - sw_int_mask(SWITCH_INTS_ALL); - sw_int_ack(SWITCH_INTS_ALL); - - err = adm5120_switch_rx_ring_alloc(); - if (err) - goto err; - - err = adm5120_switch_tx_ring_alloc(); - if (err) - goto err; - - adm5120_switch_tx_ring_reset(txl_descs, txl_skbuff, TX_RING_SIZE); - adm5120_switch_rx_ring_reset(rxl_descs, rxl_skbuff, RX_RING_SIZE); - - sw_write_reg(SWITCH_REG_SHDA, 0); - sw_write_reg(SWITCH_REG_SLDA, KSEG1ADDR(txl_descs)); - sw_write_reg(SWITCH_REG_RHDA, 0); - sw_write_reg(SWITCH_REG_RLDA, KSEG1ADDR(rxl_descs)); - - for (i = 0; i < SWITCH_NUM_PORTS; i++) { - struct net_device *dev; - struct adm5120_if_priv *priv; - - dev = adm5120_if_alloc(); - if (!dev) { - err = -ENOMEM; - goto err; - } - - 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); - - err = register_netdev(dev); - if (err) { - SW_INFO("%s register failed, error=%d\n", - dev->name, err); - goto err; - } - } - - /* setup vlan/port mapping after devs are filled up */ - adm5120_set_vlan(adm5120_eth_vlans); - - /* 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; - -err: - adm5120_switch_cleanup(); - - SW_ERR("init failed\n"); - return err; -} - -static int adm5120_switch_remove(struct platform_device *pdev) -{ - adm5120_switch_cleanup(); - return 0; -} - -static struct platform_driver adm5120_switch_driver = { - .probe = adm5120_switch_probe, - .remove = adm5120_switch_remove, - .driver = { - .name = DRV_NAME, - }, -}; - -/* -------------------------------------------------------------------------- */ - -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; -} - -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 <juhosg@openwrt.org>"); -MODULE_DESCRIPTION(DRV_DESC); -MODULE_VERSION(DRV_VERSION); |