Commit 9691edd2 authored by Don Fry's avatar Don Fry Committed by Jeff Garzik
Browse files

[PATCH] pcnet32: move/create receive and transmit routines 



Move the receive routine and create the transmit routine.

Tested ia32 and ppc64.

Signed-off-by: default avatarDon Fry <brazilnut@us.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent b368a3fb

drivers/net/pcnet32.c

+259 −256
Original line number Diff line number Diff line
@@ -299,7 +299,6 @@ static int pcnet32_probe1(unsigned long, int, struct pci_dev *); 
static int pcnet32_open(struct net_device *);

static int pcnet32_init_ring(struct net_device *);

static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);

static int pcnet32_rx(struct net_device *);

static void pcnet32_tx_timeout(struct net_device *dev);

static irqreturn_t pcnet32_interrupt(int, void *, struct pt_regs *);

static int pcnet32_close(struct net_device *);
@@ -1125,6 +1124,264 @@ static int pcnet32_suspend(struct net_device *dev, unsigned long *flags, 
	return 1;

}





static int pcnet32_rx(struct net_device *dev)

{

	struct pcnet32_private *lp = dev->priv;

	int entry = lp->cur_rx & lp->rx_mod_mask;

	int boguscnt = lp->rx_ring_size / 2;



	/* If we own the next entry, it's a new packet. Send it up. */

	while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) {

		int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8;



		if (status != 0x03) {	/* There was an error. */

			/*

			 * There is a tricky error noted by John Murphy,

			 * <murf@perftech.com> to Russ Nelson: Even with full-sized

			 * buffers it's possible for a jabber packet to use two

			 * buffers, with only the last correctly noting the error.

			 */

			if (status & 0x01)	/* Only count a general error at the */

				lp->stats.rx_errors++;	/* end of a packet. */

			if (status & 0x20)

				lp->stats.rx_frame_errors++;

			if (status & 0x10)

				lp->stats.rx_over_errors++;

			if (status & 0x08)

				lp->stats.rx_crc_errors++;

			if (status & 0x04)

				lp->stats.rx_fifo_errors++;

			lp->rx_ring[entry].status &= le16_to_cpu(0x03ff);

		} else {

			/* Malloc up new buffer, compatible with net-2e. */

			short pkt_len =

			    (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)

			    - 4;

			struct sk_buff *skb;



			/* Discard oversize frames. */

			if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {

				if (netif_msg_drv(lp))

					printk(KERN_ERR

					       "%s: Impossible packet size %d!\n",

					       dev->name, pkt_len);

				lp->stats.rx_errors++;

			} else if (pkt_len < 60) {

				if (netif_msg_rx_err(lp))

					printk(KERN_ERR "%s: Runt packet!\n",

					       dev->name);

				lp->stats.rx_errors++;

			} else {

				int rx_in_place = 0;



				if (pkt_len > rx_copybreak) {

					struct sk_buff *newskb;



					if ((newskb =

					     dev_alloc_skb(PKT_BUF_SZ))) {

						skb_reserve(newskb, 2);

						skb = lp->rx_skbuff[entry];

						pci_unmap_single(lp->pci_dev,

								 lp->

								 rx_dma_addr

								 [entry],

								 PKT_BUF_SZ - 2,

								 PCI_DMA_FROMDEVICE);

						skb_put(skb, pkt_len);

						lp->rx_skbuff[entry] = newskb;

						newskb->dev = dev;

						lp->rx_dma_addr[entry] =

						    pci_map_single(lp->pci_dev,

								   newskb->data,

								   PKT_BUF_SZ -

								   2,

								   PCI_DMA_FROMDEVICE);

						lp->rx_ring[entry].base =

						    le32_to_cpu(lp->

								rx_dma_addr

								[entry]);

						rx_in_place = 1;

					} else

						skb = NULL;

				} else {

					skb = dev_alloc_skb(pkt_len + 2);

				}



				if (skb == NULL) {

					int i;

					if (netif_msg_drv(lp))

						printk(KERN_ERR

						       "%s: Memory squeeze, deferring packet.\n",

						       dev->name);

					for (i = 0; i < lp->rx_ring_size; i++)

						if ((short)

						    le16_to_cpu(lp->

								rx_ring[(entry +

									 i)

									& lp->

									rx_mod_mask].

								status) < 0)

							break;



					if (i > lp->rx_ring_size - 2) {

						lp->stats.rx_dropped++;

						lp->rx_ring[entry].status |=

						    le16_to_cpu(0x8000);

						wmb();	/* Make sure adapter sees owner change */

						lp->cur_rx++;

					}

					break;

				}

				skb->dev = dev;

				if (!rx_in_place) {

					skb_reserve(skb, 2);	/* 16 byte align */

					skb_put(skb, pkt_len);	/* Make room */

					pci_dma_sync_single_for_cpu(lp->pci_dev,

								    lp->

								    rx_dma_addr

								    [entry],

								    PKT_BUF_SZ -

								    2,

								    PCI_DMA_FROMDEVICE);

					eth_copy_and_sum(skb,

							 (unsigned char *)(lp->

									   rx_skbuff

									   [entry]->

									   data),

							 pkt_len, 0);

					pci_dma_sync_single_for_device(lp->

								       pci_dev,

								       lp->

								       rx_dma_addr

								       [entry],

								       PKT_BUF_SZ

								       - 2,

								       PCI_DMA_FROMDEVICE);

				}

				lp->stats.rx_bytes += skb->len;

				skb->protocol = eth_type_trans(skb, dev);

				netif_rx(skb);

				dev->last_rx = jiffies;

				lp->stats.rx_packets++;

			}

		}

		/*

		 * The docs say that the buffer length isn't touched, but Andrew Boyd

		 * of QNX reports that some revs of the 79C965 clear it.

		 */

		lp->rx_ring[entry].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);

		wmb();		/* Make sure owner changes after all others are visible */

		lp->rx_ring[entry].status |= le16_to_cpu(0x8000);

		entry = (++lp->cur_rx) & lp->rx_mod_mask;

		if (--boguscnt <= 0)

			break;	/* don't stay in loop forever */

	}



	return 0;

}



static int pcnet32_tx(struct net_device *dev, u16 csr0)

{

	struct pcnet32_private *lp = dev->priv;

	unsigned int dirty_tx = lp->dirty_tx;

	int delta;

	int must_restart = 0;



	while (dirty_tx != lp->cur_tx) {

		int entry = dirty_tx & lp->tx_mod_mask;

		int status = (short)le16_to_cpu(lp->tx_ring[entry].status);



		if (status < 0)

			break;	/* It still hasn't been Txed */



		lp->tx_ring[entry].base = 0;



		if (status & 0x4000) {

			/* There was an major error, log it. */

			int err_status = le32_to_cpu(lp->tx_ring[entry].misc);

			lp->stats.tx_errors++;

			if (netif_msg_tx_err(lp))

				printk(KERN_ERR

				       "%s: Tx error status=%04x err_status=%08x\n",

				       dev->name, status,

				       err_status);

			if (err_status & 0x04000000)

				lp->stats.tx_aborted_errors++;

			if (err_status & 0x08000000)

				lp->stats.tx_carrier_errors++;

			if (err_status & 0x10000000)

				lp->stats.tx_window_errors++;

#ifndef DO_DXSUFLO

			if (err_status & 0x40000000) {

				lp->stats.tx_fifo_errors++;

				/* Ackk!  On FIFO errors the Tx unit is turned off! */

				/* Remove this verbosity later! */

				if (netif_msg_tx_err(lp))

					printk(KERN_ERR

					       "%s: Tx FIFO error! CSR0=%4.4x\n",

					       dev->name, csr0);

				must_restart = 1;

			}

#else

			if (err_status & 0x40000000) {

				lp->stats.tx_fifo_errors++;

				if (!lp->dxsuflo) {	/* If controller doesn't recover ... */

					/* Ackk!  On FIFO errors the Tx unit is turned off! */

					/* Remove this verbosity later! */

					if (netif_msg_tx_err

					    (lp))

						printk(KERN_ERR

						       "%s: Tx FIFO error! CSR0=%4.4x\n",

						       dev->name, csr0);

					must_restart = 1;

				}

			}

#endif

		} else {

			if (status & 0x1800)

				lp->stats.collisions++;

			lp->stats.tx_packets++;

		}



		/* We must free the original skb */

		if (lp->tx_skbuff[entry]) {

			pci_unmap_single(lp->pci_dev,

					 lp->tx_dma_addr[entry],

					 lp->tx_skbuff[entry]->

					 len, PCI_DMA_TODEVICE);

			dev_kfree_skb_irq(lp->tx_skbuff[entry]);

			lp->tx_skbuff[entry] = NULL;

			lp->tx_dma_addr[entry] = 0;

		}

		dirty_tx++;

	}



	delta =

	    (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask +

				       lp->tx_ring_size);

	if (delta > lp->tx_ring_size) {

		if (netif_msg_drv(lp))

			printk(KERN_ERR

			       "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",

			       dev->name, dirty_tx, lp->cur_tx,

			       lp->tx_full);

		dirty_tx += lp->tx_ring_size;

		delta -= lp->tx_ring_size;

	}



	if (lp->tx_full &&

	    netif_queue_stopped(dev) &&

	    delta < lp->tx_ring_size - 2) {

		/* The ring is no longer full, clear tbusy. */

		lp->tx_full = 0;

		netif_wake_queue(dev);

	}

	lp->dirty_tx = dirty_tx;



	return must_restart;

}



#define PCNET32_REGS_PER_PHY	32

#define PCNET32_MAX_PHYS	32

static int pcnet32_get_regs_len(struct net_device *dev)
@@ -2296,105 +2553,7 @@ pcnet32_interrupt(int irq, void *dev_id, struct pt_regs *regs) 
			pcnet32_rx(dev);



		if (csr0 & 0x0200) {	/* Tx-done interrupt */

			unsigned int dirty_tx = lp->dirty_tx;

			int delta;



			while (dirty_tx != lp->cur_tx) {

				int entry = dirty_tx & lp->tx_mod_mask;

				int status =

				    (short)le16_to_cpu(lp->tx_ring[entry].

						       status);



				if (status < 0)

					break;	/* It still hasn't been Txed */



				lp->tx_ring[entry].base = 0;



				if (status & 0x4000) {

					/* There was an major error, log it. */

					int err_status =

					    le32_to_cpu(lp->tx_ring[entry].

							misc);

					lp->stats.tx_errors++;

					if (netif_msg_tx_err(lp))

						printk(KERN_ERR

						       "%s: Tx error status=%04x err_status=%08x\n",

						       dev->name, status,

						       err_status);

					if (err_status & 0x04000000)

						lp->stats.tx_aborted_errors++;

					if (err_status & 0x08000000)

						lp->stats.tx_carrier_errors++;

					if (err_status & 0x10000000)

						lp->stats.tx_window_errors++;

#ifndef DO_DXSUFLO

					if (err_status & 0x40000000) {

						lp->stats.tx_fifo_errors++;

						/* Ackk!  On FIFO errors the Tx unit is turned off! */

						/* Remove this verbosity later! */

						if (netif_msg_tx_err(lp))

							printk(KERN_ERR

							       "%s: Tx FIFO error! CSR0=%4.4x\n",

							       dev->name, csr0);

						must_restart = 1;

					}

#else

					if (err_status & 0x40000000) {

						lp->stats.tx_fifo_errors++;

						if (!lp->dxsuflo) {	/* If controller doesn't recover ... */

							/* Ackk!  On FIFO errors the Tx unit is turned off! */

							/* Remove this verbosity later! */

							if (netif_msg_tx_err

							    (lp))

								printk(KERN_ERR

								       "%s: Tx FIFO error! CSR0=%4.4x\n",

								       dev->

								       name,

								       csr0);

							must_restart = 1;

						}

					}

#endif

				} else {

					if (status & 0x1800)

						lp->stats.collisions++;

					lp->stats.tx_packets++;

				}



				/* We must free the original skb */

				if (lp->tx_skbuff[entry]) {

					pci_unmap_single(lp->pci_dev,

							 lp->tx_dma_addr[entry],

							 lp->tx_skbuff[entry]->

							 len, PCI_DMA_TODEVICE);

					dev_kfree_skb_irq(lp->tx_skbuff[entry]);

					lp->tx_skbuff[entry] = NULL;

					lp->tx_dma_addr[entry] = 0;

				}

				dirty_tx++;

			}



			delta =

			    (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask +

						       lp->tx_ring_size);

			if (delta > lp->tx_ring_size) {

				if (netif_msg_drv(lp))

					printk(KERN_ERR

					       "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",

					       dev->name, dirty_tx, lp->cur_tx,

					       lp->tx_full);

				dirty_tx += lp->tx_ring_size;

				delta -= lp->tx_ring_size;

			}



			if (lp->tx_full &&

			    netif_queue_stopped(dev) &&

			    delta < lp->tx_ring_size - 2) {

				/* The ring is no longer full, clear tbusy. */

				lp->tx_full = 0;

				netif_wake_queue(dev);

			}

			lp->dirty_tx = dirty_tx;

			must_restart = pcnet32_tx(dev, csr0);

		}



		/* Log misc errors. */
@@ -2443,162 +2602,6 @@ pcnet32_interrupt(int irq, void *dev_id, struct pt_regs *regs) 
	return IRQ_HANDLED;

}



static int pcnet32_rx(struct net_device *dev)

{

	struct pcnet32_private *lp = dev->priv;

	int entry = lp->cur_rx & lp->rx_mod_mask;

	int boguscnt = lp->rx_ring_size / 2;



	/* If we own the next entry, it's a new packet. Send it up. */

	while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) {

		int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8;



		if (status != 0x03) {	/* There was an error. */

			/*

			 * There is a tricky error noted by John Murphy,

			 * <murf@perftech.com> to Russ Nelson: Even with full-sized

			 * buffers it's possible for a jabber packet to use two

			 * buffers, with only the last correctly noting the error.

			 */

			if (status & 0x01)	/* Only count a general error at the */

				lp->stats.rx_errors++;	/* end of a packet. */

			if (status & 0x20)

				lp->stats.rx_frame_errors++;

			if (status & 0x10)

				lp->stats.rx_over_errors++;

			if (status & 0x08)

				lp->stats.rx_crc_errors++;

			if (status & 0x04)

				lp->stats.rx_fifo_errors++;

			lp->rx_ring[entry].status &= le16_to_cpu(0x03ff);

		} else {

			/* Malloc up new buffer, compatible with net-2e. */

			short pkt_len =

			    (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)

			    - 4;

			struct sk_buff *skb;



			/* Discard oversize frames. */

			if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {

				if (netif_msg_drv(lp))

					printk(KERN_ERR

					       "%s: Impossible packet size %d!\n",

					       dev->name, pkt_len);

				lp->stats.rx_errors++;

			} else if (pkt_len < 60) {

				if (netif_msg_rx_err(lp))

					printk(KERN_ERR "%s: Runt packet!\n",

					       dev->name);

				lp->stats.rx_errors++;

			} else {

				int rx_in_place = 0;



				if (pkt_len > rx_copybreak) {

					struct sk_buff *newskb;



					if ((newskb =

					     dev_alloc_skb(PKT_BUF_SZ))) {

						skb_reserve(newskb, 2);

						skb = lp->rx_skbuff[entry];

						pci_unmap_single(lp->pci_dev,

								 lp->

								 rx_dma_addr

								 [entry],

								 PKT_BUF_SZ - 2,

								 PCI_DMA_FROMDEVICE);

						skb_put(skb, pkt_len);

						lp->rx_skbuff[entry] = newskb;

						newskb->dev = dev;

						lp->rx_dma_addr[entry] =

						    pci_map_single(lp->pci_dev,

								   newskb->data,

								   PKT_BUF_SZ -

								   2,

								   PCI_DMA_FROMDEVICE);

						lp->rx_ring[entry].base =

						    le32_to_cpu(lp->

								rx_dma_addr

								[entry]);

						rx_in_place = 1;

					} else

						skb = NULL;

				} else {

					skb = dev_alloc_skb(pkt_len + 2);

				}



				if (skb == NULL) {

					int i;

					if (netif_msg_drv(lp))

						printk(KERN_ERR

						       "%s: Memory squeeze, deferring packet.\n",

						       dev->name);

					for (i = 0; i < lp->rx_ring_size; i++)

						if ((short)

						    le16_to_cpu(lp->

								rx_ring[(entry +

									 i)

									& lp->

									rx_mod_mask].

								status) < 0)

							break;



					if (i > lp->rx_ring_size - 2) {

						lp->stats.rx_dropped++;

						lp->rx_ring[entry].status |=

						    le16_to_cpu(0x8000);

						wmb();	/* Make sure adapter sees owner change */

						lp->cur_rx++;

					}

					break;

				}

				skb->dev = dev;

				if (!rx_in_place) {

					skb_reserve(skb, 2);	/* 16 byte align */

					skb_put(skb, pkt_len);	/* Make room */

					pci_dma_sync_single_for_cpu(lp->pci_dev,

								    lp->

								    rx_dma_addr

								    [entry],

								    PKT_BUF_SZ -

								    2,

								    PCI_DMA_FROMDEVICE);

					eth_copy_and_sum(skb,

							 (unsigned char *)(lp->

									   rx_skbuff

									   [entry]->

									   data),

							 pkt_len, 0);

					pci_dma_sync_single_for_device(lp->

								       pci_dev,

								       lp->

								       rx_dma_addr

								       [entry],

								       PKT_BUF_SZ

								       - 2,

								       PCI_DMA_FROMDEVICE);

				}

				lp->stats.rx_bytes += skb->len;

				skb->protocol = eth_type_trans(skb, dev);

				netif_rx(skb);

				dev->last_rx = jiffies;

				lp->stats.rx_packets++;

			}

		}

		/*

		 * The docs say that the buffer length isn't touched, but Andrew Boyd

		 * of QNX reports that some revs of the 79C965 clear it.

		 */

		lp->rx_ring[entry].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);

		wmb();		/* Make sure owner changes after all others are visible */

		lp->rx_ring[entry].status |= le16_to_cpu(0x8000);

		entry = (++lp->cur_rx) & lp->rx_mod_mask;

		if (--boguscnt <= 0)

			break;	/* don't stay in loop forever */

	}



	return 0;

}



static int pcnet32_close(struct net_device *dev)

{

	unsigned long ioaddr = dev->base_addr;

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