X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/6638b8471f1d867c7e027301cd0bac58e5c951b3..adde7768a2eab2950a7628319ec832c63a00ff03:/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 5acdf393b..8f3610e90 100644 --- a/target/linux/adm5120/files/drivers/net/adm5120sw.c +++ b/target/linux/adm5120/files/drivers/net/adm5120sw.c @@ -1,23 +1,29 @@ /* - * 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 @@ -37,16 +43,15 @@ #define DRV_NAME "adm5120-switch" #define DRV_DESC "ADM5120 built-in ethernet switch driver" -#define DRV_VERSION "0.1.0" +#define DRV_VERSION "0.1.1" -MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)"); -MODULE_DESCRIPTION("ADM5120 ethernet switch driver"); -MODULE_LICENSE("GPL"); +#define CONFIG_ADM5120_SWITCH_NAPI 1 +#undef CONFIG_ADM5120_SWITCH_DEBUG /* ------------------------------------------------------------------------ */ -#if 1 /*def ADM5120_SWITCH_DEBUG*/ -#define SW_DBG(f, a...) printk(KERN_DEBUG "%s: " f, DRV_NAME , ## a) +#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 @@ -63,6 +68,11 @@ MODULE_LICENSE("GPL"); #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) @@ -78,10 +88,21 @@ MODULE_LICENSE("GPL"); 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) +#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 */ @@ -112,56 +133,29 @@ struct dma_desc { #define DESC_TYPE_PPPoE 0x1 /* PPPoE packet */ } __attribute__ ((aligned(16))); -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); -} - /* ------------------------------------------------------------------------ */ -/* default settings - unlimited TX and RX on all ports, default shaper mode */ -static unsigned char bw_matrix[SWITCH_NUM_PORTS] = { - 0, 0, 0, 0, 0, 0 -}; - 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 txh_descs_v[TX_RING_SIZE] __attribute__((aligned(16))); -static struct dma_desc txl_descs_v[TX_RING_SIZE] __attribute__((aligned(16))); -static struct dma_desc rxh_descs_v[RX_RING_SIZE] __attribute__((aligned(16))); -static struct dma_desc rxl_descs_v[RX_RING_SIZE] __attribute__((aligned(16))); -static struct dma_desc *txh_descs; static struct dma_desc *txl_descs; -static struct dma_desc *rxh_descs; static struct dma_desc *rxl_descs; -static struct sk_buff *rxl_skbuff[RX_RING_SIZE]; -static struct sk_buff *rxh_skbuff[RX_RING_SIZE]; -static struct sk_buff *txl_skbuff[TX_RING_SIZE]; -static struct sk_buff *txh_skbuff[TX_RING_SIZE]; +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 sw_lock = SPIN_LOCK_UNLOCKED; - -static struct net_device sw_dev; +static spinlock_t tx_lock = SPIN_LOCK_UNLOCKED; /* ------------------------------------------------------------------------ */ @@ -175,7 +169,7 @@ 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_disable(u32 mask) +static inline void sw_int_mask(u32 mask) { u32 t; @@ -184,7 +178,7 @@ static inline void sw_int_disable(u32 mask) sw_write_reg(SWITCH_REG_INT_MASK, t); } -static inline void sw_int_enable(u32 mask) +static inline void sw_int_unmask(u32 mask) { u32 t; @@ -198,6 +192,30 @@ 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) @@ -264,6 +282,63 @@ static void sw_dump_intr_mask(char *label, u32 mask) (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, @@ -276,90 +351,125 @@ static inline void adm5120_rx_dma_update(struct dma_desc *desc, DESC_OWN | (end ? DESC_EOR : 0); } -static int adm5120_switch_rx(struct net_device *dev, int *budget) +static void adm5120_switch_rx_refill(void) { - struct sk_buff *skb, *skbn; - struct adm5120_sw *priv; - struct net_device *cdev; - struct dma_desc *desc; - int len, quota; + unsigned int entry; - quota = min(dev->quota, *budget); - SW_DBG("%s polling, quota=%d\n", dev->name, quota); + for (; cur_rxl - dirty_rxl > 0; dirty_rxl++) { + struct dma_desc *desc; + struct sk_buff *skb; - sw_int_ack(SWITCH_INTS_POLL); + entry = dirty_rxl % RX_RING_SIZE; + desc = &rxl_descs[entry]; - desc = &rxl_descs[cur_rxl]; - while (!(desc->buf1 & DESC_OWN) && quota) { - u32 port = desc_get_srcport(desc); - 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 */ + 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 = rxl_skbuff[cur_rxl]; - len = desc_get_pktlen(desc); - len -= ETH_CSUM_LEN; - priv = netdev_priv(dev); - if (len <= 0 || len > RX_MAX_PKTLEN || - desc_ipcsum_fail(desc)) { - dev->stats.rx_errors++; - skbn = NULL; - } else { - skbn = dev_alloc_skb(SKB_ALLOC_LEN); - 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; - dev->stats.rx_packets++; - dev->stats.rx_bytes += len; - skb_reserve(skbn, SKB_RESERVE_LEN); - rxl_skbuff[cur_rxl] = 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 { - SW_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(&rxl_descs[cur_rxl], - rxl_skbuff[cur_rxl], - (RX_RING_SIZE-1==cur_rxl)); - if (RX_RING_SIZE == ++cur_rxl) - cur_rxl = 0; - desc = &rxl_descs[cur_rxl]; - if (skbn){ - netif_receive_skb(skb); - dev->quota--; - (*budget)--; - quota--; - } - } /* while */ - if (quota) { - netif_rx_complete(dev); - sw_int_enable(SWITCH_INTS_POLL); - return 0; + cur_rxl++; + if (cur_rxl - dirty_rxl > RX_RING_SIZE / 4) + adm5120_switch_rx_refill(); } - /* If there are still packets to process, return 1 */ - return 1; + 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; - /* find and cleanup dirty tx descriptors */ + spin_lock(&tx_lock); entry = dirty_txl % TX_RING_SIZE; while (dirty_txl != cur_txl) { struct dma_desc *desc = &txl_descs[entry]; @@ -368,7 +478,6 @@ static void adm5120_switch_tx(void) if (desc->buf1 & DESC_OWN) break; - sw_dump_desc("tx done", desc, 1); if (netif_running(skb->dev)) { skb->dev->stats.tx_bytes += skb->len; skb->dev->stats.tx_packets++; @@ -380,7 +489,6 @@ static void adm5120_switch_tx(void) } if ((cur_txl - dirty_txl) < TX_QUEUE_LEN - 4) { - /* wake up queue of all devices */ int i; for (i = 0; i < SWITCH_NUM_PORTS; i++) { if (!adm5120_devs[i]) @@ -388,52 +496,236 @@ static void adm5120_switch_tx(void) netif_wake_queue(adm5120_devs[i]); } } + spin_unlock(&tx_lock); } -static irqreturn_t adm5120_poll_irq(int irq, void *dev_id) +#ifdef CONFIG_ADM5120_SWITCH_NAPI +static int adm5120_if_poll(struct napi_struct *napi, int limit) { - struct net_device *dev = dev_id; + struct adm5120_if_priv *priv = container_of(napi, + struct adm5120_if_priv, napi); + struct net_device *dev = priv->dev; + int done; u32 status; - status = sw_read_reg(SWITCH_REG_INT_STATUS); - status &= ~(sw_read_reg(SWITCH_REG_INT_MASK)); + sw_int_ack(SWITCH_INTS_POLL); - status &= SWITCH_INTS_POLL; - if (!status) - return IRQ_NONE; + SW_DBG("%s: processing TX ring\n", dev->name); + adm5120_switch_tx(); - sw_int_disable(SWITCH_INTS_POLL); - netif_rx_schedule(dev); + SW_DBG("%s: processing RX ring\n", dev->name); + done = adm5120_switch_rx(limit); - SW_DBG("%s handling IRQ%d\n", dev->name, irq); - return IRQ_HANDLED; + status = sw_int_status() & SWITCH_INTS_POLL; + if ((done < limit) && (!status)) { + SW_DBG("disable polling mode for %s\n", dev->name); + netif_rx_complete(dev, 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) { - irqreturn_t ret; u32 status; - status = sw_read_reg(SWITCH_REG_INT_STATUS); - status &= ~(sw_read_reg(SWITCH_REG_INT_MASK)); - - sw_dump_intr_mask("sw irq", status); - - status &= SWITCH_INTS_ALL & ~SWITCH_INTS_POLL; + 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); + netif_rx_schedule(dev, &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) { - spin_lock(&sw_lock); adm5120_switch_tx(); - spin_unlock(&sw_lock); } +#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; @@ -454,34 +746,80 @@ static void adm5120_set_vlan(char *matrix) } } -static void adm5120_set_bw(char *matrix) +static void adm5120_switch_set_vlan_mac(unsigned int vlan, unsigned char *mac) { - unsigned long val; + u32 t; - /* 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); + 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); - /* 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); + 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); - SW_DBG("D: ctl0 0x%ux, ctl1 0x%ux\n", sw_read_reg(SWITCH_REG_BW_CNTL0), - sw_read_reg(SWITCH_REG_BW_CNTL1)); + 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 int adm5120_switch_open(struct net_device *dev) +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); + adm5120_if_napi_enable(dev); + + err = request_irq(dev->irq, adm5120_switch_irq, + (IRQF_SHARED | IRQF_DISABLED), 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_enable(SWITCH_INTS_USED); + sw_int_unmask(SWITCH_INTS_USED); /* enable (additional) port */ t = sw_read_reg(SWITCH_REG_PORT_CONF0); @@ -491,16 +829,22 @@ static int adm5120_switch_open(struct net_device *dev) } 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_switch_stop(struct net_device *dev) +static int adm5120_if_stop(struct net_device *dev) { u32 t; int i; - if (!--sw_used) - sw_int_disable(SWITCH_INTS_USED); + 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); @@ -511,16 +855,25 @@ static int adm5120_switch_stop(struct net_device *dev) } sw_write_reg(SWITCH_REG_PORT_CONF0, t); - netif_stop_queue(dev); + if (!--sw_used) + sw_int_mask(SWITCH_INTS_USED); + + free_irq(dev->irq, dev); + return 0; } -static int adm5120_sw_start_xmit(struct sk_buff *skb, struct net_device *dev) +static int adm5120_if_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) { struct dma_desc *desc; - struct adm5120_sw *priv = netdev_priv(dev); + 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; @@ -529,6 +882,7 @@ static int adm5120_sw_start_xmit(struct sk_buff *skb, struct net_device *dev) 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; @@ -540,41 +894,41 @@ static int adm5120_sw_start_xmit(struct sk_buff *skb, struct net_device *dev) desc->misc = ((skb->lenlen) << DESC_PKTLEN_SHIFT) | - (0x1 << priv->port); + (0x1 << priv->vlan_no); desc->buflen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; - /* lock switch irq */ - spin_lock_irq(&sw_lock); - 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) { - /* FIXME: stop queue for all devices */ - netif_stop_queue(dev); + 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(&sw_lock); + spin_unlock_irq(&tx_lock); return 0; } -static void adm5120_tx_timeout(struct net_device *dev) +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); + struct adm5120_if_priv *priv = netdev_priv(dev); u32 ports; u32 t; - ports = adm5120_eth_vlans[priv->port] & SWITCH_PORTS_NOCPU; + ports = adm5120_eth_vlans[priv->vlan_no] & SWITCH_PORTS_NOCPU; t = sw_read_reg(SWITCH_REG_CPUP_CONF); if (dev->flags & IFF_PROMISC) @@ -619,25 +973,7 @@ static void adm5120_set_multicast_list(struct net_device *dev) } -static void adm5120_write_mac(struct net_device *dev) -{ - struct adm5120_sw *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_MAC4_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->port<<3); - - sw_write_reg(SWITCH_REG_MAC_WT0, t); - - while (!(sw_read_reg(SWITCH_REG_MAC_WT0) & MAC_WT0_MWD)); -} - -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; @@ -646,17 +982,18 @@ static int adm5120_sw_set_mac_address(struct net_device *dev, void *p) 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); + struct adm5120_if_priv *priv = netdev_priv(dev); switch(cmd) { case SIOCGADMINFO: info.magic = 0x5120; info.ports = adm5120_nrdevs; - info.vlan = priv->port; + info.vlan = priv->vlan_no; err = copy_to_user(rq->ifr_data, &info, sizeof(info)); if (err) return -EFAULT; @@ -676,61 +1013,67 @@ static int adm5120_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 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; } return 0; } -static void adm5120_dma_tx_init(struct dma_desc *desc, struct sk_buff **skbl, - int num) +static struct net_device *adm5120_if_alloc(void) { - memset(desc, 0, num * sizeof(*desc)); - desc[num-1].buf1 |= DESC_EOR; - 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->open = adm5120_if_open; + dev->hard_start_xmit = adm5120_if_hard_start_xmit; + dev->stop = adm5120_if_stop; + dev->set_multicast_list = adm5120_if_set_multicast_list; + dev->do_ioctl = adm5120_if_do_ioctl; + dev->tx_timeout = adm5120_if_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + dev->set_mac_address = adm5120_if_set_mac_address; + +#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 dma_desc *desc, struct sk_buff **skbl, - int num) +/* ------------------------------------------------------------------------ */ + +static void adm5120_switch_cleanup(void) { int i; - memset(desc, 0, num * sizeof(*desc)); - for (i=0; iname, dev); - if (err) { - SW_ERR("unable to get irq for %s\n", dev->name); - goto out_int; - } + adm5120_devs[i] = dev; + priv = netdev_priv(dev); - SET_MODULE_OWNER(dev); - memset(netdev_priv(dev), 0, sizeof(struct adm5120_sw)); - ((struct adm5120_sw*)netdev_priv(dev))->port = i; - dev->base_addr = ADM5120_SWITCH_BASE; - dev->irq = ADM5120_IRQ_SWITCH; - dev->open = adm5120_switch_open; - dev->hard_start_xmit = adm5120_sw_start_xmit; - dev->stop = adm5120_switch_stop; - dev->set_multicast_list = adm5120_set_multicast_list; - dev->do_ioctl = adm5120_do_ioctl; - dev->tx_timeout = adm5120_tx_timeout; - dev->watchdog_timeo = TX_TIMEOUT; - dev->set_mac_address = adm5120_sw_set_mac_address; - dev->poll = adm5120_switch_rx; - dev->weight = 64; + 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_irq(ADM5120_IRQ_SWITCH, 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; } - SW_INFO("%s created for switch port%d\n", dev->name, i); } + /* setup vlan/port mapping after devs are filled up */ adm5120_set_vlan(adm5120_eth_vlans); @@ -830,43 +1158,48 @@ static int __init adm5120_sw_init(void) 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: +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 < SWITCH_NUM_PORTS; i++) { - struct net_device *dev = adm5120_devs[i]; - unregister_netdev(dev); - free_irq(ADM5120_IRQ_SWITCH, dev); - free_netdev(dev); - } +static struct platform_driver adm5120_switch_driver = { + .probe = adm5120_switch_probe, + .remove = adm5120_switch_remove, + .driver = { + .name = DRV_NAME, + }, +}; - free_irq(ADM5120_IRQ_SWITCH, &sw_dev); +/* -------------------------------------------------------------------------- */ - for (i = 0; i < RX_RING_SIZE; i++) { - if (!rxh_skbuff[i]) - break; - kfree_skb(rxh_skbuff[i]); - } +static int __init adm5120_switch_mod_init(void) +{ + int err; - for (i = 0; i < RX_RING_SIZE; i++) { - if (!rxl_skbuff[i]) - break; - kfree_skb(rxl_skbuff[i]); - } + 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);