diff options
Diffstat (limited to 'drivers/net/arm/ixp4xx_eth.c')
| -rw-r--r-- | drivers/net/arm/ixp4xx_eth.c | 1264 |
1 files changed, 0 insertions, 1264 deletions
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c deleted file mode 100644 index e2d702b8b2e..00000000000 --- a/drivers/net/arm/ixp4xx_eth.c +++ /dev/null @@ -1,1264 +0,0 @@ -/* - * Intel IXP4xx Ethernet driver for Linux - * - * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License - * as published by the Free Software Foundation. - * - * Ethernet port config (0x00 is not present on IXP42X): - * - * logical port 0x00 0x10 0x20 - * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C) - * physical PortId 2 0 1 - * TX queue 23 24 25 - * RX-free queue 26 27 28 - * TX-done queue is always 31, per-port RX and TX-ready queues are configurable - * - * - * Queue entries: - * bits 0 -> 1 - NPE ID (RX and TX-done) - * bits 0 -> 2 - priority (TX, per 802.1D) - * bits 3 -> 4 - port ID (user-set?) - * bits 5 -> 31 - physical descriptor address - */ - -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <linux/dmapool.h> -#include <linux/etherdevice.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/mii.h> -#include <linux/platform_device.h> -#include <mach/npe.h> -#include <mach/qmgr.h> - -#define DEBUG_QUEUES 0 -#define DEBUG_DESC 0 -#define DEBUG_RX 0 -#define DEBUG_TX 0 -#define DEBUG_PKT_BYTES 0 -#define DEBUG_MDIO 0 -#define DEBUG_CLOSE 0 - -#define DRV_NAME "ixp4xx_eth" - -#define MAX_NPES 3 - -#define RX_DESCS 64 /* also length of all RX queues */ -#define TX_DESCS 16 /* also length of all TX queues */ -#define TXDONE_QUEUE_LEN 64 /* dwords */ - -#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS)) -#define REGS_SIZE 0x1000 -#define MAX_MRU 1536 /* 0x600 */ -#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4) - -#define NAPI_WEIGHT 16 -#define MDIO_INTERVAL (3 * HZ) -#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */ -#define MAX_MII_RESET_RETRIES 100 /* mdio_read() cycles, typically 4 */ -#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */ - -#define NPE_ID(port_id) ((port_id) >> 4) -#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3) -#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23) -#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26) -#define TXDONE_QUEUE 31 - -/* TX Control Registers */ -#define TX_CNTRL0_TX_EN 0x01 -#define TX_CNTRL0_HALFDUPLEX 0x02 -#define TX_CNTRL0_RETRY 0x04 -#define TX_CNTRL0_PAD_EN 0x08 -#define TX_CNTRL0_APPEND_FCS 0x10 -#define TX_CNTRL0_2DEFER 0x20 -#define TX_CNTRL0_RMII 0x40 /* reduced MII */ -#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */ - -/* RX Control Registers */ -#define RX_CNTRL0_RX_EN 0x01 -#define RX_CNTRL0_PADSTRIP_EN 0x02 -#define RX_CNTRL0_SEND_FCS 0x04 -#define RX_CNTRL0_PAUSE_EN 0x08 -#define RX_CNTRL0_LOOP_EN 0x10 -#define RX_CNTRL0_ADDR_FLTR_EN 0x20 -#define RX_CNTRL0_RX_RUNT_EN 0x40 -#define RX_CNTRL0_BCAST_DIS 0x80 -#define RX_CNTRL1_DEFER_EN 0x01 - -/* Core Control Register */ -#define CORE_RESET 0x01 -#define CORE_RX_FIFO_FLUSH 0x02 -#define CORE_TX_FIFO_FLUSH 0x04 -#define CORE_SEND_JAM 0x08 -#define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */ - -#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \ - TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \ - TX_CNTRL0_2DEFER) -#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN -#define DEFAULT_CORE_CNTRL CORE_MDC_EN - - -/* NPE message codes */ -#define NPE_GETSTATUS 0x00 -#define NPE_EDB_SETPORTADDRESS 0x01 -#define NPE_EDB_GETMACADDRESSDATABASE 0x02 -#define NPE_EDB_SETMACADDRESSSDATABASE 0x03 -#define NPE_GETSTATS 0x04 -#define NPE_RESETSTATS 0x05 -#define NPE_SETMAXFRAMELENGTHS 0x06 -#define NPE_VLAN_SETRXTAGMODE 0x07 -#define NPE_VLAN_SETDEFAULTRXVID 0x08 -#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09 -#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A -#define NPE_VLAN_SETRXQOSENTRY 0x0B -#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C -#define NPE_STP_SETBLOCKINGSTATE 0x0D -#define NPE_FW_SETFIREWALLMODE 0x0E -#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F -#define NPE_PC_SETAPMACTABLE 0x11 -#define NPE_SETLOOPBACK_MODE 0x12 -#define NPE_PC_SETBSSIDTABLE 0x13 -#define NPE_ADDRESS_FILTER_CONFIG 0x14 -#define NPE_APPENDFCSCONFIG 0x15 -#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16 -#define NPE_MAC_RECOVERY_START 0x17 - - -#ifdef __ARMEB__ -typedef struct sk_buff buffer_t; -#define free_buffer dev_kfree_skb -#define free_buffer_irq dev_kfree_skb_irq -#else -typedef void buffer_t; -#define free_buffer kfree -#define free_buffer_irq kfree -#endif - -struct eth_regs { - u32 tx_control[2], __res1[2]; /* 000 */ - u32 rx_control[2], __res2[2]; /* 010 */ - u32 random_seed, __res3[3]; /* 020 */ - u32 partial_empty_threshold, __res4; /* 030 */ - u32 partial_full_threshold, __res5; /* 038 */ - u32 tx_start_bytes, __res6[3]; /* 040 */ - u32 tx_deferral, rx_deferral, __res7[2];/* 050 */ - u32 tx_2part_deferral[2], __res8[2]; /* 060 */ - u32 slot_time, __res9[3]; /* 070 */ - u32 mdio_command[4]; /* 080 */ - u32 mdio_status[4]; /* 090 */ - u32 mcast_mask[6], __res10[2]; /* 0A0 */ - u32 mcast_addr[6], __res11[2]; /* 0C0 */ - u32 int_clock_threshold, __res12[3]; /* 0E0 */ - u32 hw_addr[6], __res13[61]; /* 0F0 */ - u32 core_control; /* 1FC */ -}; - -struct port { - struct resource *mem_res; - struct eth_regs __iomem *regs; - struct npe *npe; - struct net_device *netdev; - struct napi_struct napi; - struct net_device_stats stat; - struct mii_if_info mii; - struct delayed_work mdio_thread; - struct eth_plat_info *plat; - buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS]; - struct desc *desc_tab; /* coherent */ - u32 desc_tab_phys; - int id; /* logical port ID */ - u16 mii_bmcr; -}; - -/* NPE message structure */ -struct msg { -#ifdef __ARMEB__ - u8 cmd, eth_id, byte2, byte3; - u8 byte4, byte5, byte6, byte7; -#else - u8 byte3, byte2, eth_id, cmd; - u8 byte7, byte6, byte5, byte4; -#endif -}; - -/* Ethernet packet descriptor */ -struct desc { - u32 next; /* pointer to next buffer, unused */ - -#ifdef __ARMEB__ - u16 buf_len; /* buffer length */ - u16 pkt_len; /* packet length */ - u32 data; /* pointer to data buffer in RAM */ - u8 dest_id; - u8 src_id; - u16 flags; - u8 qos; - u8 padlen; - u16 vlan_tci; -#else - u16 pkt_len; /* packet length */ - u16 buf_len; /* buffer length */ - u32 data; /* pointer to data buffer in RAM */ - u16 flags; - u8 src_id; - u8 dest_id; - u16 vlan_tci; - u8 padlen; - u8 qos; -#endif - -#ifdef __ARMEB__ - u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3; - u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1; - u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5; -#else - u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0; - u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4; - u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2; -#endif -}; - - -#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \ - (n) * sizeof(struct desc)) -#define rx_desc_ptr(port, n) (&(port)->desc_tab[n]) - -#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \ - ((n) + RX_DESCS) * sizeof(struct desc)) -#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS]) - -#ifndef __ARMEB__ -static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt) -{ - int i; - for (i = 0; i < cnt; i++) - dest[i] = swab32(src[i]); -} -#endif - -static spinlock_t mdio_lock; -static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */ -static int ports_open; -static struct port *npe_port_tab[MAX_NPES]; -static struct dma_pool *dma_pool; - - -static u16 mdio_cmd(struct net_device *dev, int phy_id, int location, - int write, u16 cmd) -{ - int cycles = 0; - - if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) { - printk(KERN_ERR "%s: MII not ready to transmit\n", dev->name); - return 0; - } - - if (write) { - __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]); - __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]); - } - __raw_writel(((phy_id << 5) | location) & 0xFF, - &mdio_regs->mdio_command[2]); - __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */, - &mdio_regs->mdio_command[3]); - - while ((cycles < MAX_MDIO_RETRIES) && - (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) { - udelay(1); - cycles++; - } - - if (cycles == MAX_MDIO_RETRIES) { - printk(KERN_ERR "%s: MII write failed\n", dev->name); - return 0; - } - -#if DEBUG_MDIO - printk(KERN_DEBUG "%s: mdio_cmd() took %i cycles\n", dev->name, - cycles); -#endif - - if (write) - return 0; - - if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) { - printk(KERN_ERR "%s: MII read failed\n", dev->name); - return 0; - } - - return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) | - (__raw_readl(&mdio_regs->mdio_status[1]) << 8); -} - -static int mdio_read(struct net_device *dev, int phy_id, int location) -{ - unsigned long flags; - u16 val; - - spin_lock_irqsave(&mdio_lock, flags); - val = mdio_cmd(dev, phy_id, location, 0, 0); - spin_unlock_irqrestore(&mdio_lock, flags); - return val; -} - -static void mdio_write(struct net_device *dev, int phy_id, int location, - int val) -{ - unsigned long flags; - - spin_lock_irqsave(&mdio_lock, flags); - mdio_cmd(dev, phy_id, location, 1, val); - spin_unlock_irqrestore(&mdio_lock, flags); -} - -static void phy_reset(struct net_device *dev, int phy_id) -{ - struct port *port = netdev_priv(dev); - int cycles = 0; - - mdio_write(dev, phy_id, MII_BMCR, port->mii_bmcr | BMCR_RESET); - - while (cycles < MAX_MII_RESET_RETRIES) { - if (!(mdio_read(dev, phy_id, MII_BMCR) & BMCR_RESET)) { -#if DEBUG_MDIO - printk(KERN_DEBUG "%s: phy_reset() took %i cycles\n", - dev->name, cycles); -#endif - return; - } - udelay(1); - cycles++; - } - - printk(KERN_ERR "%s: MII reset failed\n", dev->name); -} - -static void eth_set_duplex(struct port *port) -{ - if (port->mii.full_duplex) - __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX, - &port->regs->tx_control[0]); - else - __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX, - &port->regs->tx_control[0]); -} - - -static void phy_check_media(struct port *port, int init) -{ - if (mii_check_media(&port->mii, 1, init)) - eth_set_duplex(port); - if (port->mii.force_media) { /* mii_check_media() doesn't work */ - struct net_device *dev = port->netdev; - int cur_link = mii_link_ok(&port->mii); - int prev_link = netif_carrier_ok(dev); - - if (!prev_link && cur_link) { - printk(KERN_INFO "%s: link up\n", dev->name); - netif_carrier_on(dev); - } else if (prev_link && !cur_link) { - printk(KERN_INFO "%s: link down\n", dev->name); - netif_carrier_off(dev); - } - } -} - - -static void mdio_thread(struct work_struct *work) -{ - struct port *port = container_of(work, struct port, mdio_thread.work); - - phy_check_media(port, 0); - schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL); -} - - -static inline void debug_pkt(struct net_device *dev, const char *func, - u8 *data, int len) -{ -#if DEBUG_PKT_BYTES - int i; - - printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len); - for (i = 0; i < len; i++) { - if (i >= DEBUG_PKT_BYTES) - break; - printk("%s%02X", - ((i == 6) || (i == 12) || (i >= 14)) ? " " : "", - data[i]); - } - printk("\n"); -#endif -} - - -static inline void debug_desc(u32 phys, struct desc *desc) -{ -#if DEBUG_DESC - printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X" - " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n", - phys, desc->next, desc->buf_len, desc->pkt_len, - desc->data, desc->dest_id, desc->src_id, desc->flags, - desc->qos, desc->padlen, desc->vlan_tci, - desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2, - desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5, - desc->src_mac_0, desc->src_mac_1, desc->src_mac_2, - desc->src_mac_3, desc->src_mac_4, desc->src_mac_5); -#endif -} - -static inline void debug_queue(unsigned int queue, int is_get, u32 phys) -{ -#if DEBUG_QUEUES - static struct { - int queue; - char *name; - } names[] = { - { TX_QUEUE(0x10), "TX#0 " }, - { TX_QUEUE(0x20), "TX#1 " }, - { TX_QUEUE(0x00), "TX#2 " }, - { RXFREE_QUEUE(0x10), "RX-free#0 " }, - { RXFREE_QUEUE(0x20), "RX-free#1 " }, - { RXFREE_QUEUE(0x00), "RX-free#2 " }, - { TXDONE_QUEUE, "TX-done " }, - }; - int i; - - for (i = 0; i < ARRAY_SIZE(names); i++) - if (names[i].queue == queue) - break; - - printk(KERN_DEBUG "Queue %i %s%s %X\n", queue, - i < ARRAY_SIZE(names) ? names[i].name : "", - is_get ? "->" : "<-", phys); -#endif -} - -static inline u32 queue_get_entry(unsigned int queue) -{ - u32 phys = qmgr_get_entry(queue); - debug_queue(queue, 1, phys); - return phys; -} - -static inline int queue_get_desc(unsigned int queue, struct port *port, - int is_tx) -{ - u32 phys, tab_phys, n_desc; - struct desc *tab; - - if (!(phys = queue_get_entry(queue))) - return -1; - - phys &= ~0x1F; /* mask out non-address bits */ - tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0); - tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0); - n_desc = (phys - tab_phys) / sizeof(struct desc); - BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS)); - debug_desc(phys, &tab[n_desc]); - BUG_ON(tab[n_desc].next); - return n_desc; -} - -static inline void queue_put_desc(unsigned int queue, u32 phys, - struct desc *desc) -{ - debug_queue(queue, 0, phys); - debug_desc(phys, desc); - BUG_ON(phys & 0x1F); - qmgr_put_entry(queue, phys); - BUG_ON(qmgr_stat_overflow(queue)); -} - - -static inline void dma_unmap_tx(struct port *port, struct desc *desc) -{ -#ifdef __ARMEB__ - dma_unmap_single(&port->netdev->dev, desc->data, - desc->buf_len, DMA_TO_DEVICE); -#else - dma_unmap_single(&port->netdev->dev, desc->data & ~3, - ALIGN((desc->data & 3) + desc->buf_len, 4), - DMA_TO_DEVICE); -#endif -} - - -static void eth_rx_irq(void *pdev) -{ - struct net_device *dev = pdev; - struct port *port = netdev_priv(dev); - -#if DEBUG_RX - printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name); -#endif - qmgr_disable_irq(port->plat->rxq); - netif_rx_schedule(dev, &port->napi); -} - -static int eth_poll(struct napi_struct *napi, int budget) -{ - struct port *port = container_of(napi, struct port, napi); - struct net_device *dev = port->netdev; - unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id); - int received = 0; - -#if DEBUG_RX - printk(KERN_DEBUG "%s: eth_poll\n", dev->name); -#endif - - while (received < budget) { - struct sk_buff *skb; - struct desc *desc; - int n; -#ifdef __ARMEB__ - struct sk_buff *temp; - u32 phys; -#endif - - if ((n = queue_get_desc(rxq, port, 0)) < 0) { -#if DEBUG_RX - printk(KERN_DEBUG "%s: eth_poll netif_rx_complete\n", - dev->name); -#endif - netif_rx_complete(dev, napi); - qmgr_enable_irq(rxq); - if (!qmgr_stat_empty(rxq) && - netif_rx_reschedule(dev, napi)) { -#if DEBUG_RX - printk(KERN_DEBUG "%s: eth_poll" - " netif_rx_reschedule successed\n", - dev->name); -#endif - qmgr_disable_irq(rxq); - continue; - } -#if DEBUG_RX - printk(KERN_DEBUG "%s: eth_poll all done\n", - dev->name); -#endif - return received; /* all work done */ - } - - desc = rx_desc_ptr(port, n); - -#ifdef __ARMEB__ - if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) { - phys = dma_map_single(&dev->dev, skb->data, - RX_BUFF_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&dev->dev, phys)) { - dev_kfree_skb(skb); - skb = NULL; - } - } -#else - skb = netdev_alloc_skb(dev, - ALIGN(NET_IP_ALIGN + desc->pkt_len, 4)); -#endif - - if (!skb) { - port->stat.rx_dropped++; - /* put the desc back on RX-ready queue */ - desc->buf_len = MAX_MRU; - desc->pkt_len = 0; - queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc); - continue; - } - - /* process received frame */ -#ifdef __ARMEB__ - temp = skb; - skb = port->rx_buff_tab[n]; - dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN, - RX_BUFF_SIZE, DMA_FROM_DEVICE); -#else - dma_sync_single(&dev->dev, desc->data - NET_IP_ALIGN, - RX_BUFF_SIZE, DMA_FROM_DEVICE); - memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n], - ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4); -#endif - skb_reserve(skb, NET_IP_ALIGN); - skb_put(skb, desc->pkt_len); - - debug_pkt(dev, "eth_poll", skb->data, skb->len); - - skb->protocol = eth_type_trans(skb, dev); - dev->last_rx = jiffies; - port->stat.rx_packets++; - port->stat.rx_bytes += skb->len; - netif_receive_skb(skb); - - /* put the new buffer on RX-free queue */ -#ifdef __ARMEB__ - port->rx_buff_tab[n] = temp; - desc->data = phys + NET_IP_ALIGN; -#endif - desc->buf_len = MAX_MRU; - desc->pkt_len = 0; - queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc); - received++; - } - -#if DEBUG_RX - printk(KERN_DEBUG "eth_poll(): end, not all work done\n"); -#endif - return received; /* not all work done */ -} - - -static void eth_txdone_irq(void *unused) -{ - u32 phys; - -#if DEBUG_TX - printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n"); -#endif - while ((phys = queue_get_entry(TXDONE_QUEUE)) != 0) { - u32 npe_id, n_desc; - struct port *port; - struct desc *desc; - int start; - - npe_id = phys & 3; - BUG_ON(npe_id >= MAX_NPES); - port = npe_port_tab[npe_id]; - BUG_ON(!port); - phys &= ~0x1F; /* mask out non-address bits */ - n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc); - BUG_ON(n_desc >= TX_DESCS); - desc = tx_desc_ptr(port, n_desc); - debug_desc(phys, desc); - - if (port->tx_buff_tab[n_desc]) { /* not the draining packet */ - port->stat.tx_packets++; - port->stat.tx_bytes += desc->pkt_len; - - dma_unmap_tx(port, desc); -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n", - port->netdev->name, port->tx_buff_tab[n_desc]); -#endif - free_buffer_irq(port->tx_buff_tab[n_desc]); - port->tx_buff_tab[n_desc] = NULL; - } - - start = qmgr_stat_empty(port->plat->txreadyq); - queue_put_desc(port->plat->txreadyq, phys, desc); - if (start) { -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n", - port->netdev->name); -#endif - netif_wake_queue(port->netdev); - } - } -} - -static int eth_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct port *port = netdev_priv(dev); - unsigned int txreadyq = port->plat->txreadyq; - int len, offset, bytes, n; - void *mem; - u32 phys; - struct desc *desc; - -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_xmit\n", dev->name); -#endif - - if (unlikely(skb->len > MAX_MRU)) { - dev_kfree_skb(skb); - port->stat.tx_errors++; - return NETDEV_TX_OK; - } - - debug_pkt(dev, "eth_xmit", skb->data, skb->len); - - len = skb->len; -#ifdef __ARMEB__ - offset = 0; /* no need to keep alignment */ - bytes = len; - mem = skb->data; -#else - offset = (int)skb->data & 3; /* keep 32-bit alignment */ - bytes = ALIGN(offset + len, 4); - if (!(mem = kmalloc(bytes, GFP_ATOMIC))) { - dev_kfree_skb(skb); - port->stat.tx_dropped++; - return NETDEV_TX_OK; - } - memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4); - dev_kfree_skb(skb); -#endif - - phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE); - if (dma_mapping_error(&dev->dev, phys)) { -#ifdef __ARMEB__ - dev_kfree_skb(skb); -#else - kfree(mem); -#endif - port->stat.tx_dropped++; - return NETDEV_TX_OK; - } - - n = queue_get_desc(txreadyq, port, 1); - BUG_ON(n < 0); - desc = tx_desc_ptr(port, n); - -#ifdef __ARMEB__ - port->tx_buff_tab[n] = skb; -#else - port->tx_buff_tab[n] = mem; -#endif - desc->data = phys + offset; - desc->buf_len = desc->pkt_len = len; - - /* NPE firmware pads short frames with zeros internally */ - wmb(); - queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc); - dev->trans_start = jiffies; - - if (qmgr_stat_empty(txreadyq)) { -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name); -#endif - netif_stop_queue(dev); - /* we could miss TX ready interrupt */ - if (!qmgr_stat_empty(txreadyq)) { -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_xmit ready again\n", - dev->name); -#endif - netif_wake_queue(dev); - } - } - -#if DEBUG_TX - printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name); -#endif - return NETDEV_TX_OK; -} - - -static struct net_device_stats *eth_stats(struct net_device *dev) -{ - struct port *port = netdev_priv(dev); - return &port->stat; -} - -static void eth_set_mcast_list(struct net_device *dev) -{ - struct port *port = netdev_priv(dev); - struct dev_mc_list *mclist = dev->mc_list; - u8 diffs[ETH_ALEN], *addr; - int cnt = dev->mc_count, i; - - if ((dev->flags & IFF_PROMISC) || !mclist || !cnt) { - __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN, - &port->regs->rx_control[0]); - return; - } - - memset(diffs, 0, ETH_ALEN); - addr = mclist->dmi_addr; /* first MAC address */ - - while (--cnt && (mclist = mclist->next)) - for (i = 0; i < ETH_ALEN; i++) - diffs[i] |= addr[i] ^ mclist->dmi_addr[i]; - - for (i = 0; i < ETH_ALEN; i++) { - __raw_writel(addr[i], &port->regs->mcast_addr[i]); - __raw_writel(~diffs[i], &port->regs->mcast_mask[i]); - } - - __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN, - &port->regs->rx_control[0]); -} - - -static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd) -{ - struct port *port = netdev_priv(dev); - unsigned int duplex_chg; - int err; - - if (!netif_running(dev)) - return -EINVAL; - err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg); - if (duplex_chg) - eth_set_duplex(port); - return err; -} - - -static int request_queues(struct port *port) -{ - int err; - - err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0); - if (err) - return err; - - err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0); - if (err) - goto rel_rxfree; - - err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0); - if (err) - goto rel_rx; - - err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0); - if (err) - goto rel_tx; - - /* TX-done queue handles skbs sent out by the NPEs */ - if (!ports_open) { - err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0); - if (err) - goto rel_txready; - } - return 0; - -rel_txready: - qmgr_release_queue(port->plat->txreadyq); -rel_tx: - qmgr_release_queue(TX_QUEUE(port->id)); -rel_rx: - qmgr_release_queue(port->plat->rxq); -rel_rxfree: - qmgr_release_queue(RXFREE_QUEUE(port->id)); - printk(KERN_DEBUG "%s: unable to request hardware queues\n", - port->netdev->name); - return err; -} - -static void release_queues(struct port *port) -{ - qmgr_release_queue(RXFREE_QUEUE(port->id)); - qmgr_release_queue(port->plat->rxq); - qmgr_release_queue(TX_QUEUE(port->id)); - qmgr_release_queue(port->plat->txreadyq); - - if (!ports_open) - qmgr_release_queue(TXDONE_QUEUE); -} - -static int init_queues(struct port *port) -{ - int i; - - if (!ports_open) - if (!(dma_pool = dma_pool_create(DRV_NAME, NULL, - POOL_ALLOC_SIZE, 32, 0))) - return -ENOMEM; - - if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL, - &port->desc_tab_phys))) - return -ENOMEM; - memset(port->desc_tab, 0, POOL_ALLOC_SIZE); - memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */ - memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab)); - - /* Setup RX buffers */ - for (i = 0; i < RX_DESCS; i++) { - struct desc *desc = rx_desc_ptr(port, i); - buffer_t *buff; /* skb or kmalloc()ated memory */ - void *data; -#ifdef __ARMEB__ - if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE))) - return -ENOMEM; - data = buff->data; -#else - if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL))) - return -ENOMEM; - data = buff; -#endif - desc->buf_len = MAX_MRU; - desc->data = dma_map_single(&port->netdev->dev, data, - RX_BUFF_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&port->netdev->dev, desc->data)) { - free_buffer(buff); - return -EIO; - } - desc->data += NET_IP_ALIGN; - port->rx_buff_tab[i] = buff; - } - - return 0; -} - -static void destroy_queues(struct port *port) -{ - int i; - - if (port->desc_tab) { - for (i = 0; i < RX_DESCS; i++) { - struct desc *desc = rx_desc_ptr(port, i); - buffer_t *buff = port->rx_buff_tab[i]; - if (buff) { - dma_unmap_single(&port->netdev->dev, - desc->data - NET_IP_ALIGN, - RX_BUFF_SIZE, DMA_FROM_DEVICE); - free_buffer(buff); - } - } - for (i = 0; i < TX_DESCS; i++) { - struct desc *desc = tx_desc_ptr(port, i); - buffer_t *buff = port->tx_buff_tab[i]; - if (buff) { - dma_unmap_tx(port, desc); - free_buffer(buff); - } - } - dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys); - port->desc_tab = NULL; - } - - if (!ports_open && dma_pool) { - dma_pool_destroy(dma_pool); - dma_pool = NULL; - } -} - -static int eth_open(struct net_device *dev) -{ - struct port *port = netdev_priv(dev); - struct npe *npe = port->npe; - struct msg msg; - int i, err; - - if (!npe_running(npe)) { - err = npe_load_firmware(npe, npe_name(npe), &dev->dev); - if (err) - return err; - - if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) { - printk(KERN_ERR "%s: %s not responding\n", dev->name, - npe_name(npe)); - return -EIO; - } - } - - mdio_write(dev, port->plat->phy, MII_BMCR, port->mii_bmcr); - - memset(&msg, 0, sizeof(msg)); - msg.cmd = NPE_VLAN_SETRXQOSENTRY; - msg.eth_id = port->id; - msg.byte5 = port->plat->rxq | 0x80; - msg.byte7 = port->plat->rxq << 4; - for (i = 0; i < 8; i++) { - msg.byte3 = i; - if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ")) - return -EIO; - } - - msg.cmd = NPE_EDB_SETPORTADDRESS; - msg.eth_id = PHYSICAL_ID(port->id); - msg.byte2 = dev->dev_addr[0]; - msg.byte3 = dev->dev_addr[1]; - msg.byte4 = dev->dev_addr[2]; - msg.byte5 = dev->dev_addr[3]; - msg.byte6 = dev->dev_addr[4]; - msg.byte7 = dev->dev_addr[5]; - if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC")) - return -EIO; - - memset(&msg, 0, sizeof(msg)); - msg.cmd = NPE_FW_SETFIREWALLMODE; - msg.eth_id = port->id; - if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE")) - return -EIO; - - if ((err = request_queues(port)) != 0) - return err; - - if ((err = init_queues(port)) != 0) { - destroy_queues(port); - release_queues(port); - return err; - } - - for (i = 0; i < ETH_ALEN; i++) - __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]); - __raw_writel(0x08, &port->regs->random_seed); - __raw_writel(0x12, &port->regs->partial_empty_threshold); - __raw_writel(0x30, &port->regs->partial_full_threshold); - __raw_writel(0x08, &port->regs->tx_start_bytes); - __raw_writel(0x15, &port->regs->tx_deferral); - __raw_writel(0x08, &port->regs->tx_2part_deferral[0]); - __raw_writel(0x07, &port->regs->tx_2part_deferral[1]); - __raw_writel(0x80, &port->regs->slot_time); - __raw_writel(0x01, &port->regs->int_clock_threshold); - - /* Populate queues with buffers, no failure after this point */ - for (i = 0; i < TX_DESCS; i++) - queue_put_desc(port->plat->txreadyq, - tx_desc_phys(port, i), tx_desc_ptr(port, i)); - - for (i = 0; i < RX_DESCS; i++) - queue_put_desc(RXFREE_QUEUE(port->id), - rx_desc_phys(port, i), rx_desc_ptr(port, i)); - - __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]); - __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]); - __raw_writel(0, &port->regs->rx_control[1]); - __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]); - - napi_enable(&port->napi); - phy_check_media(port, 1); - eth_set_mcast_list(dev); - netif_start_queue(dev); - schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL); - - qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY, - eth_rx_irq, dev); - if (!ports_open) { - qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY, - eth_txdone_irq, NULL); - qmgr_enable_irq(TXDONE_QUEUE); - } - ports_open++; - /* we may already have RX data, enables IRQ */ - netif_rx_schedule(dev, &port->napi); - return 0; -} - -static int eth_close(struct net_device *dev) -{ - struct port *port = netdev_priv(dev); - struct msg msg; - int buffs = RX_DESCS; /* allocated RX buffers */ - int i; - - ports_open--; - qmgr_disable_irq(port->plat->rxq); - napi_disable(&port->napi); - netif_stop_queue(dev); - - while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0) - buffs--; - - memset(&msg, 0, sizeof(msg)); - msg.cmd = NPE_SETLOOPBACK_MODE; - msg.eth_id = port->id; - msg.byte3 = 1; - if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK")) - printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name); - - i = 0; - do { /* drain RX buffers */ - while (queue_get_desc(port->plat->rxq, port, 0) >= 0) - buffs--; - if (!buffs) - break; - if (qmgr_stat_empty(TX_QUEUE(port->id))) { - /* we have to inject some packet */ - struct desc *desc; - u32 phys; - int n = queue_get_desc(port->plat->txreadyq, port, 1); - BUG_ON(n < 0); - desc = tx_desc_ptr(port, n); - phys = tx_desc_phys(port, n); - desc->buf_len = desc->pkt_len = 1; - wmb(); - queue_put_desc(TX_QUEUE(port->id), phys, desc); - } - udelay(1); - } while (++i < MAX_CLOSE_WAIT); - - if (buffs) - printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)" - " left in NPE\n", dev->name, buffs); -#if DEBUG_CLOSE - if (!buffs) - printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i); -#endif - - buffs = TX_DESCS; - while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0) - buffs--; /* cancel TX */ - - i = 0; - do { - while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0) - buffs--; - if (!buffs) - break; - } while (++i < MAX_CLOSE_WAIT); - - if (buffs) - printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) " - "left in NPE\n", dev->name, buffs); -#if DEBUG_CLOSE - if (!buffs) - printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i); -#endif - - msg.byte3 = 0; - if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK")) - printk(KERN_CRIT "%s: unable to disable loopback\n", - dev->name); - - port->mii_bmcr = mdio_read(dev, port->plat->phy, MII_BMCR) & - ~(BMCR_RESET | BMCR_PDOWN); /* may have been altered */ - mdio_write(dev, port->plat->phy, MII_BMCR, - port->mii_bmcr | BMCR_PDOWN); - - if (!ports_open) - qmgr_disable_irq(TXDONE_QUEUE); - cancel_rearming_delayed_work(&port->mdio_thread); - destroy_queues(port); - release_queues(port); - return 0; -} - -static int __devinit eth_init_one(struct platform_device *pdev) -{ - struct port *port; - struct net_device *dev; - struct eth_plat_info *plat = pdev->dev.platform_data; - u32 regs_phys; - int err; - - if (!(dev = alloc_etherdev(sizeof(struct port)))) - return -ENOMEM; - - SET_NETDEV_DEV(dev, &pdev->dev); - port = netdev_priv(dev); - port->netdev = dev; - port->id = pdev->id; - - switch (port->id) { - case IXP4XX_ETH_NPEA: - port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT; - regs_phys = IXP4XX_EthA_BASE_PHYS; - break; - case IXP4XX_ETH_NPEB: - port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT; - regs_phys = IXP4XX_EthB_BASE_PHYS; - break; - case IXP4XX_ETH_NPEC: - port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT; - regs_phys = IXP4XX_EthC_BASE_PHYS; - break; - default: - err = -ENOSYS; - goto err_free; - } - - dev->open = eth_open; - dev->hard_start_xmit = eth_xmit; - dev->stop = eth_close; - dev->get_stats = eth_stats; - dev->do_ioctl = eth_ioctl; - dev->set_multicast_list = eth_set_mcast_list; - dev->tx_queue_len = 100; - - netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT); - - if (!(port->npe = npe_request(NPE_ID(port->id)))) { - err = -EIO; - goto err_free; - } - - if (register_netdev(dev)) { - err = -EIO; - goto err_npe_rel; - } - - port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name); - if (!port->mem_res) { - err = -EBUSY; - goto err_unreg; - } - - port->plat = plat; - npe_port_tab[NPE_ID(port->id)] = port; - memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN); - - platform_set_drvdata(pdev, dev); - - __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET, - &port->regs->core_control); - udelay(50); - __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control); - udelay(50); - - port->mii.dev = dev; - port->mii.mdio_read = mdio_read; - port->mii.mdio_write = mdio_write; - port->mii.phy_id = plat->phy; - port->mii.phy_id_mask = 0x1F; - port->mii.reg_num_mask = 0x1F; - - printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy, - npe_name(port->npe)); - - phy_reset(dev, plat->phy); - port->mii_bmcr = mdio_read(dev, plat->phy, MII_BMCR) & - ~(BMCR_RESET | BMCR_PDOWN); - mdio_write(dev, plat->phy, MII_BMCR, port->mii_bmcr | BMCR_PDOWN); - - INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread); - return 0; - -err_unreg: - unregister_netdev(dev); -err_npe_rel: - npe_release(port->npe); -err_free: - free_netdev(dev); - return err; -} - -static int __devexit eth_remove_one(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - struct port *port = netdev_priv(dev); - - unregister_netdev(dev); - npe_port_tab[NPE_ID(port->id)] = NULL; - platform_set_drvdata(pdev, NULL); - npe_release(port->npe); - release_resource(port->mem_res); - free_netdev(dev); - return 0; -} - -static struct platform_driver drv = { - .driver.name = DRV_NAME, - .probe = eth_init_one, - .remove = eth_remove_one, -}; - -static int __init eth_init_module(void) -{ - if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0)) - return -ENOSYS; - - /* All MII PHY accesses use NPE-B Ethernet registers */ - spin_lock_init(&mdio_lock); - mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT; - __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control); - - return platform_driver_register(&drv); -} - -static void __exit eth_cleanup_module(void) -{ - platform_driver_unregister(&drv); -} - -MODULE_AUTHOR("Krzysztof Halasa"); -MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:ixp4xx_eth"); -module_init(eth_init_module); -module_exit(eth_cleanup_module); |