/*
- * ADM5120 built in ethernet switch driver
+ * ADM5120 built-in ethernet switch driver
*
- * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
+ * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
*
- * 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 <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/netdevice.h>
#include <linux/etherdevice.h>
#define DRV_DESC "ADM5120 built-in ethernet switch driver"
#define DRV_VERSION "0.1.0"
-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 0 /*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
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 {
+ unsigned int vlan_no;
+ unsigned int port_mask;
+};
+
struct dma_desc {
__u32 buf1;
#define DESC_OWN (1UL << 31) /* Owned by the switch */
#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];
static unsigned int sw_used;
-static spinlock_t sw_lock = SPIN_LOCK_UNLOCKED;
-static spinlock_t poll_lock = SPIN_LOCK_UNLOCKED;
-
-static struct net_device sw_dev;
+static spinlock_t tx_lock = SPIN_LOCK_UNLOCKED;
/* ------------------------------------------------------------------------ */
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)
SW_DBG("rx start, limit=%d, cur_rxl=%u, dirty_rxl=%u\n",
limit, cur_rxl, dirty_rxl);
- sw_int_ack(SWITCH_INTS_POLL);
-
while (done < limit) {
int entry = cur_rxl % RX_RING_SIZE;
struct dma_desc *desc = &rxl_descs[entry];
dma_cache_wback_inv((unsigned long)skb->data,
skb->len);
+#ifdef CONFIG_ADM5120_SWITCH_USE_NAPI
netif_receive_skb(skb);
+#else
+ netif_rx(skb);
+#endif
rdev->last_rx = jiffies;
rdev->stats.rx_packets++;
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];
}
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])
netif_wake_queue(adm5120_devs[i]);
}
}
+ spin_unlock(&tx_lock);
}
+#ifdef CONFIG_ADM5120_SWITCH_NAPI
static int adm5120_if_poll(struct net_device *dev, int *budget)
{
int limit = min(dev->quota, *budget);
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);
*budget -= done;
status = sw_int_status() & SWITCH_INTS_POLL;
if ((done < limit) && (!status)) {
- SW_DBG("disable polling mode for %s\n", poll_dev->name);
+ SW_DBG("disable polling mode for %s\n", dev->name);
netif_rx_complete(dev);
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_USE_NAPI */
-static irqreturn_t adm5120_poll_irq(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- u32 status;
-
- status = sw_int_status();
- status &= SWITCH_INTS_POLL;
- if (!status)
- return IRQ_NONE;
-
- 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);
-
- return IRQ_HANDLED;
-}
static irqreturn_t adm5120_switch_irq(int irq, void *dev_id)
{
u32 status;
status = sw_int_status();
- status &= SWITCH_INTS_ALL & ~SWITCH_INTS_POLL;
+ 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;
+ 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);
+ }
+#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_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_set_bw(char *matrix)
{
unsigned long val;
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_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->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_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 | (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);
+}
+
/* ------------------------------------------------------------------------ */
static int adm5120_if_open(struct net_device *dev)
int err;
int i;
- err = request_irq(dev->irq, adm5120_poll_irq,
+ 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);
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;
/* lock switch irq */
- spin_lock_irq(&sw_lock);
+ spin_lock_irq(&tx_lock);
/* calculate the next TX descriptor entry. */
entry = cur_txl % TX_RING_SIZE;
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;
desc->misc =
((skb->len<ETH_ZLEN?ETH_ZLEN:skb->len) << DESC_PKTLEN_SHIFT) |
- (0x1 << priv->port);
+ (0x1 << priv->vlan_no);
desc->buflen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
dev->trans_start = jiffies;
- spin_unlock_irq(&sw_lock);
+ spin_unlock_irq(&tx_lock);
return 0;
}
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)
}
-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_if_set_mac_address(struct net_device *dev, void *p)
{
struct sockaddr *addr = p;
return 0;
}
-static int adm5120_if_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;
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;
}
static struct net_device *adm5120_if_alloc(void)
{
struct net_device *dev;
- struct adm5120_sw *priv;
+ struct adm5120_if_priv *priv;
dev = alloc_etherdev(sizeof(*priv));
if (!dev)
dev->open = adm5120_if_open;
dev->hard_start_xmit = adm5120_if_hard_start_xmit;
dev->stop = adm5120_if_stop;
- dev->set_multicast_list = adm5120_set_multicast_list;
+ 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
dev->poll = adm5120_if_poll;
dev->weight = 64;
+#endif
SET_MODULE_OWNER(dev);
return dev;
}
+/* ------------------------------------------------------------------------ */
+
static void adm5120_switch_cleanup(void)
{
int i;
adm5120_switch_tx_ring_free();
adm5120_switch_rx_ring_free();
-
- free_irq(ADM5120_IRQ_SWITCH, &sw_dev);
}
-static int __init adm5120_switch_init(void)
+static int __init adm5120_switch_probe(struct platform_device *pdev)
{
u32 t;
int i, err;
- err = request_irq(ADM5120_IRQ_SWITCH, adm5120_switch_irq,
- (IRQF_SHARED | IRQF_DISABLED), "switch", &sw_dev);
- if (err) {
- SW_ERR("request_irq failed with error %d\n", err);
- goto err;
- }
-
adm5120_nrdevs = adm5120_eth_num_ports;
t = CPUP_CONF_DCPUP | CPUP_CONF_CRCP |
for (i = 0; i < SWITCH_NUM_PORTS; i++) {
struct net_device *dev;
- struct adm5120_sw *priv;
+ struct adm5120_if_priv *priv;
dev = adm5120_if_alloc();
if (!dev) {
adm5120_devs[i] = dev;
priv = netdev_priv(dev);
- priv->port = i;
+ priv->vlan_no = i;
+ priv->port_mask = adm5120_eth_vlans[i];
memcpy(dev->dev_addr, adm5120_eth_macs[i], 6);
adm5120_write_mac(dev);
return err;
}
-static void __exit adm5120_switch_exit(void)
+static int adm5120_switch_remove(struct platform_device *dev)
{
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;
}
-module_init(adm5120_switch_init);
-module_exit(adm5120_switch_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 <juhosg at openwrt.org>");
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_VERSION(DRV_VERSION);
projects / openwrt / svn-archive / openwrt.git / commitdiff