#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
+#include <linux/version.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <asm/ar7/ar7.h>
-#include <asm/gpio.h>
+#include <gpio.h>
MODULE_AUTHOR("Eugene Konev");
MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)");
MODULE_LICENSE("GPL");
+static int rx_ring_size = 64;
+static int disable_napi = 0;
+module_param(rx_ring_size, int, 64);
+module_param(disable_napi, int, 0);
+MODULE_PARM_DESC(rx_ring_size, "Size of rx ring (in skbs)");
+MODULE_PARM_DESC(disable_napi, "Disable NAPI polling");
+
/* Register definitions */
struct cpmac_control_regs {
volatile u32 revision;
volatile u32 control;
volatile u32 teardown;
volatile u32 unused;
-};
+} __attribute__ ((packed));
struct cpmac_int_regs {
volatile u32 stat_raw;
volatile u32 stat_masked;
volatile u32 enable;
volatile u32 clear;
-};
+} __attribute__ ((packed));
struct cpmac_stats {
volatile u32 good;
volatile u32 filtered;
volatile u32 qos_filtered;
volatile u32 octets;
-};
+} __attribute__ ((packed));
struct cpmac_regs {
struct cpmac_control_regs tx_ctrl;
volatile u32 tx_ack[8];
volatile u32 rx_ack[8];
-};
+} __attribute__ ((packed));
struct cpmac_mdio_regs {
volatile u32 version;
#define MDIO_PHY(phy) (((phy) & 0x1f) << 16)
#define MDIO_DATA(data) ((data) & 0xffff)
volatile u32 physel;
-};
+} __attribute__ ((packed));
/* Descriptor */
struct cpmac_desc {
#define CPMAC_EOP 0x4000
#define CPMAC_OWN 0x2000
#define CPMAC_EOQ 0x1000
- u32 jiffies;
struct sk_buff *skb;
struct cpmac_desc *next;
-};
+} __attribute__ ((packed));
struct cpmac_priv {
struct net_device_stats stats;
spinlock_t lock;
- int free_tx_channels;
- struct cpmac_desc *tx_pool;
- struct cpmac_desc *rx_channels[8];
- struct cpmac_desc *tx_channels[8];
+ struct sk_buff *skb_pool;
+ int free_skbs;
+ struct cpmac_desc *rx_head;
+ int tx_head, tx_tail;
+ struct cpmac_desc *desc_ring;
struct cpmac_regs *regs;
struct mii_bus *mii_bus;
struct phy_device *phy;
char phy_name[BUS_ID_SIZE];
- unsigned long pages;
- int order;
struct plat_cpmac_data *config;
int oldlink, oldspeed, oldduplex;
u32 msg_enable;
+ struct net_device *dev;
+ struct work_struct alloc_work;
};
static irqreturn_t cpmac_irq(int, void *);
-void cpmac_exit(void);
+static void cpmac_reset(struct net_device *dev);
+static void cpmac_hw_init(struct net_device *dev);
+static int cpmac_stop(struct net_device *dev);
+static int cpmac_open(struct net_device *dev);
+
+#undef CPMAC_DEBUG
+#define CPMAC_LOW_THRESH 32
+#define CPMAC_ALLOC_SIZE 64
+#define CPMAC_SKB_SIZE 1518
+#define CPMAC_TX_RING_SIZE 8
#ifdef CPMAC_DEBUG
static void cpmac_dump_regs(u32 *base, int count)
}
printk("\n");
}
+
+static const char *cpmac_dump_buf(const uint8_t * buf, unsigned size)
+{
+ static char buffer[3 * 25 + 1];
+ char *p = &buffer[0];
+ if (size > 20)
+ size = 20;
+ while (size-- > 0) {
+ p += sprintf(p, " %02x", *buf++);
+ }
+ return buffer;
+}
#endif
static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, };
-struct mii_bus cpmac_mii = {
+static struct mii_bus cpmac_mii = {
.name = "cpmac-mii",
.read = cpmac_mdio_read,
.write = cpmac_mdio_write,
.irq = mii_irqs,
};
-int cpmac_config(struct net_device *dev, struct ifmap *map)
+static int cpmac_config(struct net_device *dev, struct ifmap *map)
{
if (dev->flags & IFF_UP)
return -EBUSY;
return 0;
}
-int cpmac_set_mac_address(struct net_device *dev, void *addr)
+static int cpmac_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = addr;
return 0;
}
-void cpmac_set_multicast_list(struct net_device *dev)
+static void cpmac_set_multicast_list(struct net_device *dev)
{
struct dev_mc_list *iter;
int i;
}
}
-static void cpmac_rx(struct net_device *dev, int channel)
+static struct sk_buff *cpmac_get_skb(struct net_device *dev)
{
- struct cpmac_desc *pkt;
struct sk_buff *skb;
- char *data;
struct cpmac_priv *priv = netdev_priv(dev);
- spin_lock(&priv->lock);
- pkt = priv->rx_channels[channel];
- if (!pkt) {
- if (printk_ratelimit())
- printk(KERN_NOTICE "%s: rx: spurious interrupt\n",
- dev->name);
- priv->stats.rx_errors++;
- return;
+ skb = priv->skb_pool;
+ if (likely(skb)) {
+ priv->skb_pool = skb->next;
+ } else {
+ skb = dev_alloc_skb(CPMAC_SKB_SIZE + 2);
+ if (skb) {
+ skb->next = NULL;
+ skb_reserve(skb, 2);
+ skb->dev = priv->dev;
+ }
}
- priv->regs->rx_ack[channel] = virt_to_phys(pkt);
- dma_cache_inv((u32)pkt, 16);
- if (!pkt->datalen) {
+ if (likely(priv->free_skbs))
+ priv->free_skbs--;
+
+ if (priv->free_skbs < CPMAC_LOW_THRESH)
+ schedule_work(&priv->alloc_work);
+
+ return skb;
+}
+
+static inline struct sk_buff *cpmac_rx_one(struct net_device *dev,
+ struct cpmac_priv *priv,
+ struct cpmac_desc *desc)
+{
+ unsigned long flags;
+ char *data;
+ struct sk_buff *skb, *result = NULL;
+
+ priv->regs->rx_ack[0] = virt_to_phys(desc);
+ if (unlikely(!desc->datalen)) {
if (printk_ratelimit())
- printk(KERN_NOTICE "%s: rx: spurious interrupt\n",
- dev->name);
+ printk(KERN_WARNING "%s: rx: spurious interrupt\n",
+ dev->name);
priv->stats.rx_errors++;
- return;
+ return NULL;
}
- skb = dev_alloc_skb(1536);
- if (!skb) {
+
+ spin_lock_irqsave(&priv->lock, flags);
+ skb = cpmac_get_skb(dev);
+ if (likely(skb)) {
+ data = (char *)phys_to_virt(desc->hw_data);
+ dma_cache_inv((u32)data, desc->datalen);
+ skb_put(desc->skb, desc->datalen);
+ desc->skb->protocol = eth_type_trans(desc->skb, dev);
+ desc->skb->ip_summed = CHECKSUM_NONE;
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += desc->datalen;
+ result = desc->skb;
+ desc->skb = skb;
+ } else {
+#ifdef CPMAC_DEBUG
if (printk_ratelimit())
- printk(KERN_NOTICE "%s: rx: low on mem - packet dropped\n",
- dev->name);
+ printk("%s: low on skbs, dropping packet\n",
+ dev->name);
+#endif
priv->stats.rx_dropped++;
- } else {
- data = (char *)phys_to_virt(pkt->hw_data);
- dma_cache_inv((u32)data, pkt->datalen);
- skb_put(pkt->skb, pkt->datalen);
- pkt->skb->protocol = eth_type_trans(pkt->skb, dev);
- pkt->skb->ip_summed = CHECKSUM_NONE;
- priv->stats.rx_packets++;
- priv->stats.rx_bytes += pkt->datalen;
- netif_rx(pkt->skb);
- skb_reserve(skb, 2);
- skb->dev = dev;
- pkt->skb = skb;
- pkt->hw_data = virt_to_phys(skb->data);
}
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ desc->hw_data = virt_to_phys(desc->skb->data);
+ desc->buflen = CPMAC_SKB_SIZE;
+ desc->dataflags = CPMAC_OWN;
+ dma_cache_wback((u32)desc, 16);
+
+ return result;
+}
+
+static void cpmac_rx(struct net_device *dev)
+{
+ struct sk_buff *skb;
+ struct cpmac_desc *desc;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
+ spin_lock(&priv->lock);
+ if (unlikely(!priv->rx_head)) {
+ spin_unlock(&priv->lock);
+ return;
+ }
+
+ desc = priv->rx_head;
+ dma_cache_inv((u32)desc, 16);
+#ifdef CPMAC_DEBUG
+ printk(KERN_DEBUG "%s: len=%d, %s\n", __func__, pkt->datalen,
+ cpmac_dump_buf(data, pkt->datalen));
+#endif
+
+ while ((desc->dataflags & CPMAC_OWN) == 0) {
+ skb = cpmac_rx_one(dev, priv, desc);
+ if (likely(skb)) {
+ netif_rx(skb);
+ }
+ desc = desc->next;
+ dma_cache_inv((u32)desc, 16);
+ }
+
+ priv->rx_head = desc;
+ priv->regs->rx_ptr[0] = virt_to_phys(desc);
spin_unlock(&priv->lock);
- pkt->buflen = 1500 + ETH_HLEN + 4;
- pkt->datalen = 0;
- pkt->dataflags = CPMAC_OWN;
- dma_cache_wback_inv((u32)pkt, 16);
- priv->regs->rx_ptr[channel] = virt_to_phys(pkt);
}
-struct cpmac_desc *cpmac_get_desc(struct net_device *dev)
+static int cpmac_poll(struct net_device *dev, int *budget)
{
- struct cpmac_desc *pkt;
+ struct sk_buff *skb;
+ struct cpmac_desc *desc;
+ int received = 0, quota = min(dev->quota, *budget);
struct cpmac_priv *priv = netdev_priv(dev);
- pkt = priv->tx_pool;
- priv->tx_pool = pkt->next;
- pkt->next = NULL;
- if (priv->tx_pool == NULL)
- netif_stop_queue(dev);
- return pkt;
+
+ if (unlikely(!priv->rx_head)) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "%s: rx: polling, but no queue\n",
+ dev->name);
+ netif_rx_complete(dev);
+ return 0;
+ }
+
+ desc = priv->rx_head;
+ dma_cache_inv((u32)desc, 16);
+
+ while ((received < quota) && ((desc->dataflags & CPMAC_OWN) == 0)) {
+ skb = cpmac_rx_one(dev, priv, desc);
+ if (likely(skb)) {
+ netif_receive_skb(skb);
+ received++;
+ }
+ desc = desc->next;
+ priv->rx_head = desc;
+ dma_cache_inv((u32)desc, 16);
+ }
+
+ *budget -= received;
+ dev->quota -= received;
+#ifdef CPMAC_DEBUG
+ printk("%s: processed %d packets\n", dev->name, received);
+#endif
+ if (desc->dataflags & CPMAC_OWN) {
+ priv->regs->rx_ptr[0] = virt_to_phys(desc);
+ netif_rx_complete(dev);
+ priv->regs->rx_int.enable = 0x1;
+ priv->regs->rx_int.clear = 0xfe;
+ return 0;
+ }
+
+ return 1;
}
-void cpmac_release_desc(struct net_device *dev, struct cpmac_desc *pkt)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+static void
+cpmac_alloc_skbs(struct work_struct *work)
+{
+ struct cpmac_priv *priv = container_of(work, struct cpmac_priv,
+ alloc_work);
+#else
+static void
+cpmac_alloc_skbs(void *data)
{
+ struct net_device *dev = (struct net_device*)data;
struct cpmac_priv *priv = netdev_priv(dev);
- struct cpmac_desc *p;
- p = pkt;
- while (p->next) p = p->next;
- p->next = priv->tx_pool;
- priv->tx_pool = pkt;
+#endif
+ unsigned long flags;
+ int i, num_skbs = 0;
+ struct sk_buff *skb, *skbs = NULL;
+
+ for (i = 0; i < CPMAC_ALLOC_SIZE; i++) {
+ skb = alloc_skb(CPMAC_SKB_SIZE + 2, GFP_KERNEL);
+ if (!skb)
+ break;
+ skb->next = skbs;
+ skb_reserve(skb, 2);
+ skb->dev = priv->dev;
+ num_skbs++;
+ skbs = skb;
+ }
+
+ if (skbs) {
+ spin_lock_irqsave(&priv->lock, flags);
+ for (skb = priv->skb_pool; skb && skb->next; skb = skb->next);
+ if (!skb) {
+ priv->skb_pool = skbs;
+ } else {
+ skb->next = skbs;
+ }
+ priv->free_skbs += num_skbs;
+ spin_unlock_irqrestore(&priv->lock, flags);
+#ifdef CPMAC_DEBUG
+ printk("%s: allocated %d skbs\n", priv->dev->name, num_skbs);
+#endif
+ }
}
-int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned long flags;
- int i, len, frag;
- skb_frag_t *this_frag;
- void *data;
- struct cpmac_desc *head, *tail, *curr;
+ int len, chan;
+ struct cpmac_desc *desc;
struct cpmac_priv *priv = netdev_priv(dev);
- BUG_ON(priv->free_tx_channels < 1);
len = skb->len;
- if (len < ETH_ZLEN) {
- if (skb_padto(skb, ETH_ZLEN)) {
+#ifdef CPMAC_DEBUG
+ printk(KERN_DEBUG "%s: len=%d\n", __func__, len); //cpmac_dump_buf(const uint8_t * buf, unsigned size)
+#endif
+ if (unlikely(len < ETH_ZLEN)) {
+ if (unlikely(skb_padto(skb, ETH_ZLEN))) {
if (printk_ratelimit())
printk(KERN_NOTICE "%s: padding failed, dropping\n",
dev->name);
len = ETH_ZLEN;
}
spin_lock_irqsave(&priv->lock, flags);
- dev->trans_start = jiffies;
- for (i = 0; i < 8; i++)
- if (!priv->tx_channels[i])
- break;
+ chan = priv->tx_tail++;
+ priv->tx_tail %= 8;
+ if (priv->tx_tail == priv->tx_head)
+ netif_stop_queue(dev);
- BUG_ON(i == 8);
+ desc = &priv->desc_ring[chan];
+ dma_cache_inv((u32)desc, 16);
+ if (desc->dataflags & CPMAC_OWN) {
+ printk(KERN_NOTICE "%s: tx dma ring full, dropping\n", dev->name);
+ priv->stats.tx_dropped++;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return -ENOMEM;
+ }
- head = cpmac_get_desc(dev);
- priv->tx_channels[i] = head;
- head->jiffies = dev->trans_start;
- if (!(--priv->free_tx_channels))
- netif_stop_queue(dev);
+ dev->trans_start = jiffies;
+ desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN;
+ desc->skb = skb;
+ desc->hw_data = virt_to_phys(skb->data);
+ dma_cache_wback((u32)skb->data, len);
+ desc->buflen = len;
+ desc->datalen = len;
+ desc->hw_next = 0;
+ dma_cache_wback((u32)desc, 16);
+ priv->regs->tx_ptr[chan] = virt_to_phys(desc);
spin_unlock_irqrestore(&priv->lock, flags);
- head->dataflags = CPMAC_SOP | CPMAC_OWN;
- head->skb = skb;
- head->hw_data = virt_to_phys(skb->data);
- dma_cache_wback_inv((u32)skb->data, len);
- head->buflen = len;
- head->datalen = len;
- tail = head;
- for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
- dma_cache_wback_inv((u32)tail, 16);
- this_frag = &skb_shinfo(skb)->frags[frag];
- curr = cpmac_get_desc(dev);
- data = page_address(this_frag->page) +
- this_frag->page_offset;
- curr->hw_data = virt_to_phys(data);
- curr->buflen = this_frag->size;
- curr->datalen = this_frag->size;
- curr->dataflags = CPMAC_OWN;
- dma_cache_wback_inv((u32)data, len);
- tail->hw_next = virt_to_phys(curr);
- tail->next = curr;
- tail = curr;
- }
- tail->hw_next = 0;
- tail->dataflags |= CPMAC_EOP;
- dma_cache_wback_inv((u32)tail, 16);
- priv->regs->tx_ptr[i] = virt_to_phys(head);
return 0;
}
-void cpmac_end_xmit(struct net_device *dev, int channel)
+static void cpmac_end_xmit(struct net_device *dev, int channel)
{
- struct cpmac_desc *pkt;
+ struct cpmac_desc *desc;
struct cpmac_priv *priv = netdev_priv(dev);
spin_lock(&priv->lock);
- pkt = priv->tx_channels[channel];
- priv->tx_channels[channel] = NULL;
- priv->free_tx_channels++;
- priv->regs->tx_ack[channel] = virt_to_phys(pkt);
- if (pkt) {
+ desc = &priv->desc_ring[channel];
+ priv->regs->tx_ack[channel] = virt_to_phys(desc);
+ if (likely(desc->skb)) {
priv->stats.tx_packets++;
- priv->stats.tx_bytes += pkt->skb->len;
- dev_kfree_skb_irq(pkt->skb);
- cpmac_release_desc(dev, pkt);
+ priv->stats.tx_bytes += desc->skb->len;
+ dev_kfree_skb_irq(desc->skb);
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
} else {
spin_unlock(&priv->lock);
}
+static void cpmac_reset(struct net_device *dev)
+{
+ int i;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
+ ar7_device_reset(priv->config->reset_bit);
+ priv->regs->rx_ctrl.control &= ~1;
+ priv->regs->tx_ctrl.control &= ~1;
+ for (i = 0; i < 8; i++) {
+ priv->regs->tx_ptr[i] = 0;
+ priv->regs->rx_ptr[i] = 0;
+ }
+ priv->regs->mac_control &= ~MAC_MII; /* disable mii */
+}
+
+static inline void cpmac_free_rx_ring(struct net_device *dev)
+{
+ struct cpmac_desc *desc;
+ int i;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
+ if (unlikely(!priv->rx_head))
+ return;
+
+ desc = priv->rx_head;
+ dma_cache_inv((u32)desc, 16);
+
+ for (i = 0; i < rx_ring_size; i++) {
+ desc->buflen = CPMAC_SKB_SIZE;
+ if ((desc->dataflags & CPMAC_OWN) == 0) {
+ desc->dataflags = CPMAC_OWN;
+ priv->stats.rx_dropped++;
+ }
+ dma_cache_wback((u32)desc, 16);
+ desc = desc->next;
+ dma_cache_inv((u32)desc, 16);
+ }
+}
+
static irqreturn_t cpmac_irq(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
}
if (status & INTST_RX) {
- cpmac_rx(dev, (status >> 8) & 7);
+ if (disable_napi) {
+ cpmac_rx(dev);
+ } else {
+ priv->regs->rx_int.enable = 0;
+ priv->regs->rx_int.clear = 0xff;
+ netif_rx_schedule(dev);
+ }
}
- if (status & INTST_HOST) { /* host interrupt ??? */
- printk("%s: host int, something bad happened...\n", dev->name);
- printk("%s: mac status: 0x%08x\n", dev->name,
- priv->regs->mac_status);
- }
+ priv->regs->mac_eoi_vector = 0;
- if (status & INTST_STATUS) { /* status interrupt ??? */
- printk("%s: status int, what are we gonna do?\n", dev->name);
+ if (unlikely(status & (INTST_HOST | INTST_STATUS))) {
+ if (printk_ratelimit()) {
+ printk(KERN_ERR "%s: hw error, resetting...\n", dev->name);
+ }
+ spin_lock(&priv->lock);
+ phy_stop(priv->phy);
+ cpmac_reset(dev);
+ cpmac_free_rx_ring(dev);
+ cpmac_hw_init(dev);
+ spin_unlock(&priv->lock);
}
- priv->regs->mac_eoi_vector = 0;
return IRQ_HANDLED;
}
-void cpmac_tx_timeout(struct net_device *dev)
+static void cpmac_tx_timeout(struct net_device *dev)
{
- int i;
struct cpmac_priv *priv = netdev_priv(dev);
- struct cpmac_desc *pkt = NULL, *tmp;
+ struct cpmac_desc *desc;
priv->stats.tx_errors++;
- for (i = 0; i < 8; i++) {
- tmp = priv->tx_channels[i];
- if (tmp && (!pkt || (pkt->jiffies > tmp->jiffies)))
- pkt = tmp;
- }
- if (pkt) {
- printk("Transmit timeout at %ld, latency %ld\n", jiffies,
- jiffies - pkt->jiffies);
- for (i = 0; i < 8; i++)
- if (priv->tx_channels[i] == pkt)
- priv->tx_channels[i] = NULL;
- dev_kfree_skb(pkt->skb);
- cpmac_release_desc(dev, pkt);
- priv->free_tx_channels++;
- netif_wake_queue(dev);
- }
+ desc = &priv->desc_ring[priv->tx_head++];
+ priv->tx_head %= 8;
+ printk("%s: transmit timeout\n", dev->name);
+ if (desc->skb)
+ dev_kfree_skb(desc->skb);
+ netif_wake_queue(dev);
}
-int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct cpmac_priv *priv = netdev_priv(dev);
if (!(netif_running(dev)))
return -EINVAL;
if (!priv->phy)
return -EINVAL;
- return phy_mii_ioctl(priv->phy, if_mii(ifr), cmd);
+ if ((cmd == SIOCGMIIPHY) || (cmd == SIOCGMIIREG) ||
+ (cmd == SIOCSMIIREG))
+ return phy_mii_ioctl(priv->phy, if_mii(ifr), cmd);
+
+ return -EINVAL;
}
static int cpmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
return 0;
}
-static void cpmac_reset(struct net_device *dev)
-{
- int i;
- struct cpmac_priv *priv = netdev_priv(dev);
-
- ar7_device_reset(priv->config->reset_bit);
- priv->regs->rx_ctrl.control &= ~1;
- priv->regs->tx_ctrl.control &= ~1;
- for (i = 0; i < 8; i++) {
- priv->regs->tx_ptr[i] = 0;
- priv->regs->rx_ptr[i] = 0;
- }
- priv->regs->mac_control &= ~MAC_MII; /* disable mii */
-}
-
static void cpmac_adjust_link(struct net_device *dev)
{
struct cpmac_priv *priv = netdev_priv(dev);
spin_unlock_irqrestore(&priv->lock, flags);
}
-int cpmac_open(struct net_device *dev)
+static void cpmac_hw_init(struct net_device *dev)
+{
+ int i;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
+ for (i = 0; i < 8; i++)
+ priv->regs->tx_ptr[i] = 0;
+ priv->regs->rx_ptr[0] = virt_to_phys(priv->rx_head);
+
+ priv->regs->mbp = MBP_RXSHORT | MBP_RXBCAST | MBP_RXMCAST;
+ priv->regs->unicast_enable = 0x1;
+ priv->regs->unicast_clear = 0xfe;
+ priv->regs->buffer_offset = 0;
+ for (i = 0; i < 8; i++)
+ priv->regs->mac_addr_low[i] = dev->dev_addr[5];
+ priv->regs->mac_addr_mid = dev->dev_addr[4];
+ priv->regs->mac_addr_high = dev->dev_addr[0] | (dev->dev_addr[1] << 8)
+ | (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
+ priv->regs->max_len = CPMAC_SKB_SIZE;
+ priv->regs->rx_int.enable = 0x1;
+ priv->regs->rx_int.clear = 0xfe;
+ priv->regs->tx_int.enable = 0xff;
+ priv->regs->tx_int.clear = 0;
+ priv->regs->mac_int_enable = 3;
+ priv->regs->mac_int_clear = 0xfc;
+
+ priv->regs->rx_ctrl.control |= 1;
+ priv->regs->tx_ctrl.control |= 1;
+ priv->regs->mac_control |= MAC_MII | MAC_FDX;
+
+ priv->phy->state = PHY_CHANGELINK;
+ phy_start(priv->phy);
+}
+
+static int cpmac_open(struct net_device *dev)
{
- int i, j, res;
+ int i, size, res;
struct cpmac_priv *priv = netdev_priv(dev);
- struct cpmac_desc *pkt;
+ struct cpmac_desc *desc;
struct sk_buff *skb;
-/* priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link,
- 0, PHY_INTERFACE_MODE_MII);*/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+ priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link,
+ 0, PHY_INTERFACE_MODE_MII);
+#else
priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link, 0);
+#endif
if (IS_ERR(priv->phy)) {
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
return PTR_ERR(priv->phy);
goto fail_remap;
}
- priv->order = get_order(4096);
- priv->pages = __get_dma_pages(GFP_KERNEL, priv->order);
- if (!priv->pages) {
+ priv->rx_head = NULL;
+ size = sizeof(struct cpmac_desc) * (rx_ring_size +
+ CPMAC_TX_RING_SIZE);
+ priv->desc_ring = (struct cpmac_desc *)kmalloc(size, GFP_KERNEL);
+ if (!priv->desc_ring) {
res = -ENOMEM;
goto fail_alloc;
}
- memset((char *)priv->pages, 0, 4096);
-
- priv->tx_pool = NULL;
-
- for (i = 0; i < 4096 / sizeof(struct cpmac_desc); i++) {
- pkt = (struct cpmac_desc *)
- (priv->pages + i * sizeof(struct cpmac_desc));
- memset(pkt, sizeof(struct cpmac_desc), 0);
- if (i < 8) {
- skb = alloc_skb(1500 + ETH_HLEN + 6, GFP_KERNEL);
- if (!skb) {
- for(j = 0; j < i - 1; j++)
- kfree_skb(priv->rx_channels[j]->skb);
- free_pages(priv->pages, priv->order);
- res = -ENOMEM;
- goto fail_alloc;
- }
- skb_reserve(skb, 2);
- skb->dev = dev;
- pkt->skb = skb;
- pkt->hw_data = virt_to_phys(skb->data);
- pkt->buflen = 1500 + ETH_HLEN + 4;
- pkt->dataflags = CPMAC_OWN;
- dma_cache_wback_inv((u32)pkt, 16);
- priv->rx_channels[i] = pkt;
- priv->tx_channels[i] = NULL;
- } else {
- pkt->next = priv->tx_pool;
- priv->tx_pool = pkt;
- }
- }
- cpmac_reset(dev);
- priv->free_tx_channels = 8;
+ memset((char *)priv->desc_ring, 0, size);
- for (i = 0; i < 8; i++) {
- priv->regs->tx_ptr[i] = 0;
- priv->regs->rx_ptr[i] = virt_to_phys(priv->rx_channels[i]);
- }
+ priv->skb_pool = NULL;
+ priv->free_skbs = 0;
+ priv->rx_head = &priv->desc_ring[CPMAC_TX_RING_SIZE];
- priv->regs->mbp = MBP_RXNOCHAIN | MBP_RXSHORT | MBP_RXBCAST |
- MBP_RXMCAST;
- priv->regs->unicast_enable = 0xff;
- priv->regs->unicast_clear = 0;
- priv->regs->buffer_offset = 0;
- for (i = 0; i < 8; i++)
- priv->regs->mac_addr_low[i] = dev->dev_addr[5];
- priv->regs->mac_addr_mid = dev->dev_addr[4];
- priv->regs->mac_addr_high = dev->dev_addr[0] | (dev->dev_addr[1] << 8)
- | (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
- priv->regs->max_len = 1536;
- priv->regs->rx_int.enable = 0xff;
- priv->regs->rx_int.clear = 0;
- priv->regs->tx_int.enable = 0xff;
- priv->regs->tx_int.clear = 0;
- priv->regs->mac_int_enable = 3;
- priv->regs->mac_int_clear = 0xfc;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+ INIT_WORK(&priv->alloc_work, cpmac_alloc_skbs);
+#else
+ INIT_WORK(&priv->alloc_work, cpmac_alloc_skbs, dev);
+#endif
+ schedule_work(&priv->alloc_work);
+ flush_scheduled_work();
+
+ for (i = 0; i < rx_ring_size; i++) {
+ desc = &priv->rx_head[i];
+ skb = cpmac_get_skb(dev);
+ if (!skb) {
+ res = -ENOMEM;
+ goto fail_desc;
+ }
+ desc->skb = skb;
+ desc->hw_data = virt_to_phys(skb->data);
+ desc->buflen = CPMAC_SKB_SIZE;
+ desc->dataflags = CPMAC_OWN;
+ desc->next = &priv->rx_head[(i + 1) % rx_ring_size];
+ desc->hw_next = virt_to_phys(desc->next);
+ dma_cache_wback((u32)desc, 16);
+ }
if((res = request_irq(dev->irq, cpmac_irq, SA_INTERRUPT,
dev->name, dev))) {
goto fail_irq;
}
- priv->regs->rx_ctrl.control |= 1;
- priv->regs->tx_ctrl.control |= 1;
- priv->regs->mac_control |= MAC_MII | MAC_FDX;
-
- priv->phy->state = PHY_CHANGELINK;
- phy_start(priv->phy);
+ cpmac_reset(dev);
+ cpmac_hw_init(dev);
netif_start_queue(dev);
-
return 0;
fail_irq:
- for(i = 0; i < 8; i++)
- if (priv->rx_channels[i]->skb)
- kfree_skb(priv->rx_channels[i]->skb);
- free_pages(priv->pages, priv->order);
-
+fail_desc:
+ for (i = 0; i < rx_ring_size; i++)
+ if (priv->rx_head[i].skb)
+ kfree_skb(priv->rx_head[i].skb);
fail_alloc:
+ kfree(priv->desc_ring);
+
+ for (skb = priv->skb_pool; skb; skb = priv->skb_pool) {
+ priv->skb_pool = skb->next;
+ kfree_skb(skb);
+ }
+
iounmap(priv->regs);
fail_remap:
return res;
}
-int cpmac_stop(struct net_device *dev)
+static int cpmac_stop(struct net_device *dev)
{
int i;
+ struct sk_buff *skb;
struct cpmac_priv *priv = netdev_priv(dev);
netif_stop_queue(dev);
release_mem_region(dev->mem_start, dev->mem_end -
dev->mem_start);
- for(i = 0; i < 8; i++)
- if (priv->rx_channels[i]->skb)
- kfree_skb(priv->rx_channels[i]->skb);
- if (priv->pages)
- free_pages(priv->pages, priv->order);
+ cancel_delayed_work(&priv->alloc_work);
+ flush_scheduled_work();
+
+ priv->rx_head = &priv->desc_ring[CPMAC_TX_RING_SIZE];
+ for (i = 0; i < rx_ring_size; i++)
+ if (priv->rx_head[i].skb)
+ kfree_skb(priv->rx_head[i].skb);
+
+ kfree(priv->desc_ring);
+
+ for (skb = priv->skb_pool; skb; skb = priv->skb_pool) {
+ priv->skb_pool = skb->next;
+ kfree_skb(skb);
+ }
return 0;
}
static int external_switch = 0;
-int __devinit cpmac_probe(struct platform_device *pdev)
+static int __devinit cpmac_probe(struct platform_device *pdev)
{
int i, rc, phy_id;
struct resource *res;
dev->set_multicast_list = cpmac_set_multicast_list;
dev->tx_timeout = cpmac_tx_timeout;
dev->ethtool_ops = &cpmac_ethtool_ops;
+ if (!disable_napi) {
+ dev->poll = cpmac_poll;
+ dev->weight = min(rx_ring_size, 64);
+ }
memset(priv, 0, sizeof(struct cpmac_priv));
spin_lock_init(&priv->lock);
priv->msg_enable = netif_msg_init(NETIF_MSG_WOL, 0x3fff);
priv->config = pdata;
+ priv->dev = dev;
memcpy(dev->dev_addr, priv->config->dev_addr, sizeof(dev->dev_addr));
if (phy_id == 31) {
snprintf(priv->phy_name, BUS_ID_SIZE, PHY_ID_FMT,
#warning FIXME: unhardcode gpio&reset bits
ar7_gpio_disable(26);
ar7_gpio_disable(27);
-/* ar7_device_reset(17);
- ar7_device_reset(21);
- ar7_device_reset(26);*/
+ ar7_device_reset(AR7_RESET_BIT_CPMAC_LO);
+ ar7_device_reset(AR7_RESET_BIT_CPMAC_HI);
+ ar7_device_reset(AR7_RESET_BIT_EPHY);
cpmac_mii.reset(&cpmac_mii);
projects / openwrt.git / blobdiff