#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
+#include <linux/version.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
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);
+
+#define CPMAC_LOW_THRESH 8
+#define CPMAC_ALLOC_SIZE 32
+#define CPMAC_SKB_SIZE 1536
+#define CPMAC_TX_RING_SIZE 8
+#define CPMAC_RX_RING_SIZE 16
#ifdef CPMAC_DEBUG
static void cpmac_dump_regs(u32 *base, int count)
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;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
+ skb = priv->skb_pool;
+ if (likely(skb))
+ priv->skb_pool = skb->next;
+
+ if (likely(priv->free_skbs))
+ priv->free_skbs--;
+
+ if (priv->free_skbs < CPMAC_LOW_THRESH)
+ schedule_work(&priv->alloc_work);
+
+ return skb;
+}
+
+static void cpmac_rx(struct net_device *dev, int channel)
+{
char *data;
+ struct sk_buff *skb;
+ struct cpmac_desc *desc;
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++;
+ if (unlikely(!priv->rx_head))
return;
- }
- priv->regs->rx_ack[channel] = virt_to_phys(pkt);
- dma_cache_inv((u32)pkt, 16);
- if (!pkt->datalen) {
- if (printk_ratelimit())
- printk(KERN_NOTICE "%s: rx: spurious interrupt\n",
- dev->name);
- priv->stats.rx_errors++;
- return;
- }
- skb = dev_alloc_skb(1536);
- if (!skb) {
- if (printk_ratelimit())
- printk(KERN_NOTICE "%s: rx: low on mem - packet dropped\n",
- dev->name);
- 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);
+ desc = priv->rx_head;
+ dma_cache_inv((u32)desc, 16);
+
+ while((desc->dataflags & CPMAC_OWN) == 0) {
+ 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);
+ priv->stats.rx_errors++;
+ goto out;
+ }
+
+ 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;
+ netif_rx(desc->skb);
+ desc->skb = skb;
+ } else {
+ if (printk_ratelimit())
+ printk(KERN_NOTICE "%s: rx: no free skbs, dropping packet\n",
+ dev->name);
+ priv->stats.rx_dropped++;
+ }
+ desc->hw_data = virt_to_phys(desc->skb->data);
+ desc->buflen = CPMAC_SKB_SIZE;
+ desc->dataflags = CPMAC_OWN;
+ dma_cache_wback((u32)desc, 16);
+ desc = desc->next;
+ dma_cache_inv((u32)desc, 16);
}
+out:
+ priv->rx_head = 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);
+ priv->regs->rx_ptr[0] = virt_to_phys(priv->rx_head);
}
-struct cpmac_desc *cpmac_get_desc(struct net_device *dev)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+static void
+cpmac_alloc_skbs(struct work_struct *work)
{
- struct cpmac_desc *pkt;
- 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;
-}
-
-void cpmac_release_desc(struct net_device *dev, struct cpmac_desc *pkt)
+ 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)) {
+ 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;
-
- BUG_ON(i == 8);
-
- head = cpmac_get_desc(dev);
- priv->tx_channels[i] = head;
- head->jiffies = dev->trans_start;
- if (!(--priv->free_tx_channels))
+ chan = priv->tx_tail++;
+ priv->tx_tail %= 8;
+ if (priv->tx_tail == priv->tx_head)
netif_stop_queue(dev);
+
+ desc = &priv->desc_ring[chan];
+ dev->trans_start = jiffies;
+ desc->jiffies = dev->trans_start;
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);
+ 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);
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);
- if (netif_queue_stopped(dev))
- netif_wake_queue(dev);
+ priv->stats.tx_bytes += desc->skb->len;
+ dev_kfree_skb_irq(desc->skb);
+ if (priv->tx_head == channel) {
+ while ((desc->dataflags & CPMAC_OWN) == 0) {
+ priv->tx_head++;
+ priv->tx_head %= 8;
+ if (priv->tx_head == priv->tx_tail)
+ break;
+ desc = &priv->desc_ring[priv->tx_head];
+ }
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
} else {
if (printk_ratelimit())
printk(KERN_NOTICE "%s: end_xmit: spurious interrupt\n",
cpmac_rx(dev, (status >> 8) & 7);
}
- if (status & INTST_HOST) { /* host interrupt ??? */
+ if (unlikely(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);
}
- if (status & INTST_STATUS) { /* status interrupt ??? */
+ if (unlikely(status & INTST_STATUS)) { /* status interrupt ??? */
printk("%s: status int, what are we gonna do?\n", dev->name);
}
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("Transmit timeout at %ld, latency %ld\n", jiffies,
+ jiffies - desc->jiffies);
+ 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)))
spin_unlock_irqrestore(&priv->lock, flags);
}
-int cpmac_open(struct net_device *dev)
+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) * (CPMAC_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;
+
+ memset((char *)priv->desc_ring, 0, size);
+
+ priv->skb_pool = NULL;
+ priv->free_skbs = 0;
+ priv->rx_head = &priv->desc_ring[CPMAC_TX_RING_SIZE];
+
+#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 < CPMAC_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];
+ desc->hw_next = virt_to_phys(desc->next);
+ dma_cache_wback((u32)desc, 16);
}
+ priv->rx_head[CPMAC_RX_RING_SIZE - 1].next = priv->rx_head;
+ priv->rx_head[CPMAC_RX_RING_SIZE - 1].hw_next =
+ virt_to_phys(priv->rx_head);
cpmac_reset(dev);
- priv->free_tx_channels = 8;
-
- for (i = 0; i < 8; i++) {
+ 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->regs->rx_ptr[0] = virt_to_phys(priv->rx_head);
- priv->regs->mbp = MBP_RXNOCHAIN | MBP_RXSHORT | MBP_RXBCAST |
- MBP_RXMCAST;
- priv->regs->unicast_enable = 0xff;
- priv->regs->unicast_clear = 0;
+ 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 = 1536;
- priv->regs->rx_int.enable = 0xff;
- priv->regs->rx_int.clear = 0;
+ 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;
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 < CPMAC_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 < CPMAC_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;
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(17);
ar7_device_reset(21);
- ar7_device_reset(26);*/
+ ar7_device_reset(26);
cpmac_mii.reset(&cpmac_mii);
projects / openwrt / svn-archive / archive.git / blobdiff