+++ /dev/null
-/*
- * 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);
projects / openwrt / svn-archive / archive.git / blobdiff