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-rw-r--r--target/linux/rdc/files/drivers/net/r6040.c316
1 files changed, 165 insertions, 151 deletions
diff --git a/target/linux/rdc/files/drivers/net/r6040.c b/target/linux/rdc/files/drivers/net/r6040.c
index 0b09f79d2..2703db457 100644
--- a/target/linux/rdc/files/drivers/net/r6040.c
+++ b/target/linux/rdc/files/drivers/net/r6040.c
@@ -50,35 +50,34 @@
#include <asm/processor.h>
#define DRV_NAME "r6040"
-#define DRV_VERSION "0.18"
-#define DRV_RELDATE "13Jun2008"
+#define DRV_VERSION "0.19"
+#define DRV_RELDATE "16Jun2008"
/* define bits of a debug mask */
-#define DBG_PHY (1<< 0) /*!< show PHY read/write */
-#define DBG_FREE_BUFS (1<< 1) /*!< show calls to r6040_free_*bufs */
-#define DBG_RING (1<< 2) /*!< debug init./freeing of descr rings */
-#define DBG_RX_BUF (1<< 3) /*!< show alloc. of new rx buf (in IRQ context !) */
-#define DBG_TX_BUF (1<< 4) /*!< show arrival of new tx buf */
-#define DBG_RX_IRQ (1<< 5) /*!< show RX IRQ handling */
-#define DBG_TX_IRQ (1<< 6) /*!< debug TX done IRQ */
-#define DBG_RX_DESCR (1<< 7) /*!< debug rx descr to be processed */
-#define DBG_RX_DATA (1<< 8) /*!< show some user data of incoming packet */
-#define DBG_EXIT (1<< 9) /*!< show exit code calls */
-#define DBG_INIT (1<<10) /*!< show init. code calls */
-#define DBG_TX_RING_DUMP (1<<11) /*!< dump the tx ring after creation */
-#define DBG_RX_RING_DUMP (1<<12) /*!< dump the rx ring after creation */
-#define DBG_TX_DESCR (1<<13) /*!< dump the setting of a descr for tx */
-#define DBG_TX_DATA (1<<14) /*!< dump some tx data */
-#define DBG_IRQ (1<<15) /*!< print inside the irq handler */
-#define DBG_POLL (1<<16) /*!< dump info on poll procedure */
-#define DBG_MAC_ADDR (1<<17) /*!< debug mac address setting */
-#define DBG_OPEN (1<<18) /*!< debug open proc. */
+#define DBG_PHY 0x00000001 /*!< show PHY read/write */
+#define DBG_FREE_BUFS 0x00000002 /*!< show calls to r6040_free_*bufs */
+#define DBG_RING 0x00000004 /*!< debug init./freeing of descr rings */
+#define DBG_RX_BUF 0x00000008 /*!< show alloc. of new rx buf (in IRQ context !) */
+#define DBG_TX_BUF 0x00000010 /*!< show arrival of new tx buf */
+#define DBG_TX_DONE 0x00000020 /*!< debug TX done */
+#define DBG_RX_DESCR 0x00000040 /*!< debug rx descr to be processed */
+#define DBG_RX_DATA 0x00000080 /*!< show some user data of incoming packet */
+#define DBG_EXIT 0x00000100 /*!< show exit code calls */
+#define DBG_INIT 0x00000200 /*!< show init. code calls */
+#define DBG_TX_RING_DUMP 0x00000400 /*!< dump the tx ring after creation */
+#define DBG_RX_RING_DUMP 0x00000800 /*!< dump the rx ring after creation */
+#define DBG_TX_DESCR 0x00001000 /*!< dump the setting of a descr for tx */
+#define DBG_TX_DATA 0x00002000 /*!< dump some tx data */
+#define DBG_IRQ 0x00004000 /*!< print inside the irq handler */
+#define DBG_POLL 0x00008000 /*!< dump info on poll procedure */
+#define DBG_MAC_ADDR 0x00010000 /*!< debug mac address setting */
+#define DBG_OPEN 0x00020000 /*!< debug open proc. */
static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "debug mask (-1 for all)");
-/* define wcd hich debugs are left in the code during compilation */
+/* define which debugs are left in the code during compilation */
#define DEBUG (-1) /* all debugs */
#define dbg(l, f, ...) \
@@ -207,6 +206,21 @@ struct r6040_descriptor {
u32 rev2; /* 1C-1F */
} __attribute__((aligned(32)));
+/*! defines for the status field in the r6040_descriptor */
+#define DESC_STATUS_OWNER_MAC (1<<15) /*!< if set the MAC is the owner of this descriptor */
+#define DESC_STATUS_RX_OK (1<<14) /*!< rx was successful */
+#define DESC_STATUS_RX_ERR (1<<11) /*!< rx PHY error */
+#define DESC_STATUS_RX_ERR_DRIBBLE (1<<10) /*!< rx dribble packet */
+#define DESC_STATUS_RX_ERR_BUFLEN (1<< 9) /*!< rx length exceeded buffer size */
+#define DESC_STATUS_RX_ERR_LONG (1<< 8) /*!< rx length > maximum packet length */
+#define DESC_STATUS_RX_ERR_RUNT (1<< 7) /*!< rx: packet length < 64 byte */
+#define DESC_STATUS_RX_ERR_CRC (1<< 6) /*!< rx: crc error */
+#define DESC_STATUS_RX_BROADCAST (1<< 5) /*!< rx: broadcast (no error) */
+#define DESC_STATUS_RX_MULTICAST (1<< 4) /*!< rx: multicast (no error) */
+#define DESC_STATUS_RX_MCH_HIT (1<< 3) /*!< rx: multicast hit in hash table (no error) */
+#define DESC_STATUS_RX_MIDH_HIT (1<< 2) /*!< rx: MID table hit (no error) */
+#define DESC_STATUS_RX_IDX_MID_MASK 3 /*!< rx: mask for the index of matched MIDx */
+
struct r6040_private {
spinlock_t lock; /* driver lock */
struct timer_list timer;
@@ -219,7 +233,7 @@ struct r6040_private {
struct r6040_descriptor *tx_ring;
dma_addr_t rx_ring_dma;
dma_addr_t tx_ring_dma;
- u16 tx_free_desc, rx_free_desc, phy_addr, phy_mode;
+ u16 tx_free_desc, phy_addr, phy_mode;
u16 mcr0, mcr1;
u16 switch_sig;
struct net_device *dev;
@@ -251,23 +265,23 @@ void r6040_multicast_list(struct net_device *dev);
It is omitted if delim == '\0' */
STATIC char *hex2str(void *addr, char *buf, int nr_bytes, int delim)
{
- unsigned char *dst = addr;
+ unsigned char *src = addr;
char *outb = buf;
#define BIN2HEXDIGIT(x) ((x) < 10 ? '0'+(x) : 'A'-10+(x))
while (nr_bytes > 0) {
- *outb++ = BIN2HEXDIGIT(*dst>>4);
- *outb++ = BIN2HEXDIGIT(*dst&0xf);
+ *outb++ = BIN2HEXDIGIT(*src>>4);
+ *outb++ = BIN2HEXDIGIT(*src&0xf);
if (delim)
*outb++ = delim;
nr_bytes--;
- dst++;
+ src++;
}
if (delim)
- dst--;
- *dst = '\0';
+ outb--;
+ *outb = '\0';
return buf;
}
@@ -355,6 +369,7 @@ void r6040_free_txbufs(struct net_device *dev)
dbg(DBG_FREE_BUFS, "EXIT\n");
}
+/*! unmap and free all rx skb */
void r6040_free_rxbufs(struct net_device *dev)
{
struct r6040_private *lp = netdev_priv(dev);
@@ -384,47 +399,21 @@ void r6040_init_ring_desc(struct r6040_descriptor *desc_ring,
dbg(DBG_RING, "desc_ring %p desc_dma %08x size x%x\n",
desc_ring, desc_dma, size);
+
while (size-- > 0) {
mapping += sizeof(*desc);
+ memset(desc, 0, sizeof(*desc));
desc->ndesc = cpu_to_le32(mapping);
desc->vndescp = desc + 1;
desc++;
}
+
+ /* last descriptor points to first one to close the descriptor ring */
desc--;
desc->ndesc = cpu_to_le32(desc_dma);
desc->vndescp = desc_ring;
}
-/* Allocate skb buffer for rx descriptor */
-STATIC void rx_buf_alloc(struct r6040_private *lp, struct net_device *dev)
-{
- struct r6040_descriptor *descptr;
-
- dbg(DBG_RX_BUF, "rx_insert %p rx_free_desc x%x dev %p\n",
- lp->rx_insert_ptr, lp->rx_free_desc, dev);
-
- descptr = lp->rx_insert_ptr;
- while (lp->rx_free_desc < RX_DCNT) {
- descptr->skb_ptr = netdev_alloc_skb(dev, MAX_BUF_SIZE);
-
- dbg(DBG_RX_BUF, "alloc'ed skb %p for rx descptr %p\n",
- descptr->skb_ptr, descptr);
-
- if (!descptr->skb_ptr)
- break;
- descptr->buf = cpu_to_le32(pci_map_single(lp->pdev,
- descptr->skb_ptr->data,
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
- descptr->status = 0x8000;
- /* debug before descptr goes to next ! */
- dbg(DBG_RX_BUF, "descptr %p skb->data %p buf %08x rx_free_desc x%x\n",
- descptr, descptr->skb_ptr->data, descptr->buf, lp->rx_free_desc);
- descptr = descptr->vndescp;
- lp->rx_free_desc++;
- }
- lp->rx_insert_ptr = descptr;
-}
-
#if (DEBUG & DBG_TX_RING_DUMP)
/*! dump the tx ring to syslog */
STATIC void
@@ -449,7 +438,7 @@ dump_tx_ring(struct r6040_private *lp)
}
#endif /* #if (DEBUG & DBG_TX_RING_DUMP) */
-void r6040_alloc_txbufs(struct net_device *dev)
+void r6040_init_txbufs(struct net_device *dev)
{
struct r6040_private *lp = netdev_priv(dev);
@@ -489,22 +478,44 @@ dump_rx_ring(struct r6040_private *lp)
}
#endif /* #if (DEBUG & DBG_TX_RING_DUMP) */
-void r6040_alloc_rxbufs(struct net_device *dev)
+int r6040_alloc_rxbufs(struct net_device *dev)
{
struct r6040_private *lp = netdev_priv(dev);
-
- lp->rx_free_desc = 0;
+ struct r6040_descriptor *desc;
+ struct sk_buff *skb;
+ int rc;
lp->rx_remove_ptr = lp->rx_insert_ptr = lp->rx_ring;
r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT);
- rx_buf_alloc(lp, dev);
+ /* alloc skbs for the rx descriptors */
+ desc = lp->rx_ring;
+ do {
+ if (!(skb=netdev_alloc_skb(dev, MAX_BUF_SIZE))) {
+ err("failed to alloc skb for rx\n");
+ rc = -ENOMEM;
+ goto err_exit;
+ }
+ desc->skb_ptr = skb;
+ desc->buf = cpu_to_le32(pci_map_single(lp->pdev,
+ desc->skb_ptr->data,
+ MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
+ desc->status = DESC_STATUS_OWNER_MAC;
+ desc = desc->vndescp;
+ } while (desc != lp->rx_ring);
#if (DEBUG & DBG_RX_RING_DUMP)
if (debug & DBG_RX_RING_DUMP) {
dump_rx_ring(lp);
}
#endif
+
+ return 0;
+
+err_exit:
+ /* dealloc all previously allocated skb */
+ r6040_free_rxbufs(dev);
+ return rc;
}
/*! reset MAC and set all registers */
@@ -548,8 +559,8 @@ void r6040_init_mac_regs(struct r6040_private *lp)
iowrite16(lp->rx_ring_dma >> 16, ioaddr + MRD_SA1);
/* set interrupt waiting time and packet numbers */
- iowrite16(0x0F06, ioaddr + MT_ICR);
- iowrite16(0x0F06, ioaddr + MR_ICR);
+ iowrite16(0, ioaddr + MT_ICR);
+ iowrite16(0, ioaddr + MR_ICR);
/* enable interrupts */
iowrite16(INT_MASK, ioaddr + MIER);
@@ -637,8 +648,8 @@ int r6040_close(struct net_device *dev)
/* deleted timer */
del_timer_sync(&lp->timer);
-
spin_lock_irq(&lp->lock);
+ napi_disable(&lp->napi);
netif_stop_queue(dev);
r6040_down(dev);
spin_unlock_irq(&lp->lock);
@@ -711,85 +722,78 @@ int r6040_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
int r6040_rx(struct net_device *dev, int limit)
{
struct r6040_private *priv = netdev_priv(dev);
- int count;
- void __iomem *ioaddr = priv->base;
- u16 err;
-
- for (count = 0; count < limit; ++count) {
- struct r6040_descriptor *descptr = priv->rx_remove_ptr;
- struct sk_buff *skb_ptr;
+ int count=0;
+ struct r6040_descriptor *descptr = priv->rx_remove_ptr;
+ struct sk_buff *skb_ptr, *new_skb;
+ char obuf[2*32+1] __attribute__ ((unused)); /* for debugging */
- descptr = priv->rx_remove_ptr;
+ while (count < limit && !(descptr->status & DESC_STATUS_OWNER_MAC)) {
+ /* limit not reached and the descriptor belongs to the CPU */
+ dbg(DBG_RX_DESCR, "descptr %p status x%x data len x%x\n",
+ descptr, descptr->status, descptr->len);
+
/* Check for errors */
- err = ioread16(ioaddr + MLSR);
- if (err & 0x0400)
+ if (descptr->status & DESC_STATUS_RX_ERR) {
+
dev->stats.rx_errors++;
- /* RX FIFO over-run */
- if (err & 0x8000)
- dev->stats.rx_fifo_errors++;
- /* RX descriptor unavailable */
- if (err & 0x0080)
- dev->stats.rx_frame_errors++;
- /* Received packet with length over buffer lenght */
- if (err & 0x0020)
- dev->stats.rx_over_errors++;
- /* Received packet with too long or short */
- if (err & (0x0010 | 0x0008))
- dev->stats.rx_length_errors++;
- /* Received packet with CRC errors */
- if (err & 0x0004) {
- spin_lock(&priv->lock);
- dev->stats.rx_crc_errors++;
- spin_unlock(&priv->lock);
- }
-
- dbg(DBG_RX_IRQ, "descptr %p status x%x err x%x\n",
- descptr, descptr->status, err);
-
- while (priv->rx_free_desc) {
- /* No RX packet */
- if (descptr->status & 0x8000)
- break;
- skb_ptr = descptr->skb_ptr;
- if (!skb_ptr) {
- printk(KERN_ERR "%s: Inconsistent RX"
- "descriptor chain\n",
- dev->name);
- break;
+
+ if (descptr->status & (DESC_STATUS_RX_ERR_DRIBBLE|
+ DESC_STATUS_RX_ERR_BUFLEN|
+ DESC_STATUS_RX_ERR_LONG|
+ DESC_STATUS_RX_ERR_RUNT)) {
+ /* packet too long or too short*/
+ dev->stats.rx_length_errors++;
}
- descptr->skb_ptr = NULL;
- skb_ptr->dev = priv->dev;
- /* Do not count the CRC */
- skb_put(skb_ptr, descptr->len - 4);
- pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
- skb_ptr->protocol = eth_type_trans(skb_ptr, priv->dev);
- dbg(DBG_RX_DESCR, "descptr %p status x%x err x%x data len x%x\n",
- descptr, descptr->status, err, descptr->len);
-
- {
- char obuf[2*32+1] __attribute__ ((unused));
- dbg(DBG_RX_DATA, "rx len x%x: %s...\n",
- descptr->len,
- hex2str(skb_ptr->data, obuf, sizeof(obuf)/2, '\0'));
+ if (descptr->status & DESC_STATUS_RX_ERR_CRC) {
+ dev->stats.rx_crc_errors++;
}
-
- /* Send to upper layer */
- netif_receive_skb(skb_ptr);
- dev->last_rx = jiffies;
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += descptr->len;
- /* To next descriptor */
- descptr = descptr->vndescp;
- priv->rx_free_desc--;
+ goto next_descr;
}
- priv->rx_remove_ptr = descptr;
- }
- /* Allocate new RX buffer */
- if (priv->rx_free_desc < RX_DCNT)
- rx_buf_alloc(priv, priv->dev);
+
+ /* successful received packet */
+
+ /* first try to allocate new skb. If this fails
+ we drop the packet and leave the old skb there.*/
+ new_skb = netdev_alloc_skb(dev, MAX_BUF_SIZE);
+ if (!new_skb) {
+ dev->stats.rx_dropped++;
+ goto next_descr;
+ }
+ skb_ptr = descptr->skb_ptr;
+ skb_ptr->dev = priv->dev;
+ /* Do not count the CRC */
+ skb_put(skb_ptr, descptr->len - 4);
+ pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
+ MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ skb_ptr->protocol = eth_type_trans(skb_ptr, priv->dev);
+
+ dbg(DBG_RX_DATA, "rx len x%x: %s...\n",
+ descptr->len,
+ hex2str(skb_ptr->data, obuf, sizeof(obuf)/2, '\0'));
+
+ /* Send to upper layer */
+ netif_receive_skb(skb_ptr);
+ dev->last_rx = jiffies;
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += (descptr->len-4);
+
+ /* put new skb into descriptor */
+ descptr->skb_ptr = new_skb;
+ descptr->buf = cpu_to_le32(pci_map_single(priv->pdev,
+ descptr->skb_ptr->data,
+ MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
+
+next_descr:
+ /* put the descriptor back to the MAC */
+ descptr->status = DESC_STATUS_OWNER_MAC;
+ descptr = descptr->vndescp;
+ count++; /* shall we count errors and dropped packets as well? */
+ } /* while (limit && !(descptr->status & DESC_STATUS_OWNER_MAC)) */
+
+ /* remember next descriptor to check for rx */
+ priv->rx_remove_ptr = descptr;
return count;
}
@@ -813,8 +817,8 @@ void r6040_tx(struct net_device *dev)
if (err & (0x2000 | 0x4000))
dev->stats.tx_carrier_errors++;
- dbg(DBG_TX_IRQ, "descptr %p status x%x err x%x\n",
- descptr, descptr->status, err);
+ dbg(DBG_TX_DONE, "descptr %p status x%x err x%x jiffies %lu\n",
+ descptr, descptr->status, err, jiffies);
if (descptr->status & 0x8000)
break; /* Not complete */
@@ -866,7 +870,7 @@ irqreturn_t r6040_interrupt(int irq, void *dev_id)
/* Read MISR status and clear */
status = ioread16(ioaddr + MISR);
- dbg(DBG_IRQ, "status x%x\n", status);
+ dbg(DBG_IRQ, "status x%x jiffies %lu\n", status, jiffies);
if (status == 0x0000 || status == 0xffff)
return IRQ_NONE;
@@ -885,7 +889,7 @@ irqreturn_t r6040_interrupt(int irq, void *dev_id)
}
/* rx FIFO full */
- if (status & (1<<2)) {
+ if (status & RX_FIFO_FULL) {
dev->stats.rx_fifo_errors++;
}
@@ -906,16 +910,18 @@ void r6040_poll_controller(struct net_device *dev)
#endif
/* Init RDC MAC */
-void r6040_up(struct net_device *dev)
+int r6040_up(struct net_device *dev)
{
struct r6040_private *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->base;
+ int rc;
dbg(DBG_INIT, "ENTER\n");
/* Initialise and alloc RX/TX buffers */
- r6040_alloc_txbufs(dev);
- r6040_alloc_rxbufs(dev);
+ r6040_init_txbufs(dev);
+ if ((rc=r6040_alloc_rxbufs(dev)))
+ return rc;
/* Read the PHY ID */
lp->switch_sig = phy_read(ioaddr, 0, 2);
@@ -945,6 +951,8 @@ void r6040_up(struct net_device *dev)
/* Reset MAC and init all registers */
r6040_init_mac_regs(lp);
+
+ return 0;
}
/*
@@ -1007,8 +1015,14 @@ int r6040_open(struct net_device *dev)
dbg(DBG_OPEN, "allocated tx ring\n");
- r6040_up(dev);
-
+ if ((ret=r6040_up(dev))) {
+ pci_free_consistent(lp->pdev, TX_DESC_SIZE, lp->tx_ring,
+ lp->tx_ring_dma);
+ pci_free_consistent(lp->pdev, RX_DESC_SIZE, lp->rx_ring,
+ lp->rx_ring_dma);
+ return ret;
+ }
+
napi_enable(&lp->napi);
netif_start_queue(dev);
@@ -1054,8 +1068,8 @@ int r6040_start_xmit(struct sk_buff *skb, struct net_device *dev)
descptr->buf = cpu_to_le32(pci_map_single(lp->pdev,
skb->data, skb->len, PCI_DMA_TODEVICE));
- dbg(DBG_TX_DESCR, "desc @ %p: len x%x buf %08x skb->data %p skb->len x%x\n",
- descptr, descptr->len, descptr->buf, skb->data, skb->len);
+ dbg(DBG_TX_DESCR, "desc @ %p: len x%x buf %08x skb->data %p skb->len x%x jiffies %lu\n",
+ descptr, descptr->len, descptr->buf, skb->data, skb->len, jiffies);
{
char obuf[2*32+1];
@@ -1255,8 +1269,6 @@ int __devinit r6040_init_one(struct pci_dev *pdev,
}
SET_NETDEV_DEV(dev, &pdev->dev);
lp = netdev_priv(dev);
- lp->pdev = pdev;
- lp->dev = dev;
if (pci_request_regions(pdev, DRV_NAME)) {
printk(KERN_ERR DRV_NAME ": Failed to request PCI regions\n");
@@ -1283,6 +1295,8 @@ int __devinit r6040_init_one(struct pci_dev *pdev,
/* Link new device into r6040_root_dev */
lp->pdev = pdev;
+ lp->dev = dev;
+
/* Init RDC private data */
lp->mcr0 = 0x1002;
lp->phy_addr = phy_table[card_idx];
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 12:16:54 +0000