diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-05-16 10:39:01 +0200 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-12 01:29:07 +0200 |
commit | 8fb6b0908176704a3ea22005e8a9fa3ebf35b5be (patch) | |
tree | 1eefa29ce73cd5be2b0fcbd12d03ac148d171cc5 /drivers/net/mace.c | |
parent | stmmac: Move the STMicroelectronics driver (diff) | |
download | linux-8fb6b0908176704a3ea22005e8a9fa3ebf35b5be.tar.xz linux-8fb6b0908176704a3ea22005e8a9fa3ebf35b5be.zip |
bmac/mace/macmace/mac89x0/cs89x0: Move the Macintosh (Apple) drivers
Move the Apple drivers into driver/net/ethernet/apple/ and make the
necessary Kconfig and Makefile changes.
CC: Paul Mackerras <paulus@samba.org>
CC: Paul Mackerras <paulus@au.ibm.com>
CC: Russell Nelson <nelson@crynwr.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/mace.c')
-rw-r--r-- | drivers/net/mace.c | 1031 |
1 files changed, 0 insertions, 1031 deletions
diff --git a/drivers/net/mace.c b/drivers/net/mace.c deleted file mode 100644 index 2074e9724ba3..000000000000 --- a/drivers/net/mace.c +++ /dev/null @@ -1,1031 +0,0 @@ -/* - * Network device driver for the MACE ethernet controller on - * Apple Powermacs. Assumes it's under a DBDMA controller. - * - * Copyright (C) 1996 Paul Mackerras. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/delay.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/crc32.h> -#include <linux/spinlock.h> -#include <linux/bitrev.h> -#include <linux/slab.h> -#include <asm/prom.h> -#include <asm/dbdma.h> -#include <asm/io.h> -#include <asm/pgtable.h> -#include <asm/macio.h> - -#include "mace.h" - -static int port_aaui = -1; - -#define N_RX_RING 8 -#define N_TX_RING 6 -#define MAX_TX_ACTIVE 1 -#define NCMDS_TX 1 /* dma commands per element in tx ring */ -#define RX_BUFLEN (ETH_FRAME_LEN + 8) -#define TX_TIMEOUT HZ /* 1 second */ - -/* Chip rev needs workaround on HW & multicast addr change */ -#define BROKEN_ADDRCHG_REV 0x0941 - -/* Bits in transmit DMA status */ -#define TX_DMA_ERR 0x80 - -struct mace_data { - volatile struct mace __iomem *mace; - volatile struct dbdma_regs __iomem *tx_dma; - int tx_dma_intr; - volatile struct dbdma_regs __iomem *rx_dma; - int rx_dma_intr; - volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */ - volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */ - struct sk_buff *rx_bufs[N_RX_RING]; - int rx_fill; - int rx_empty; - struct sk_buff *tx_bufs[N_TX_RING]; - int tx_fill; - int tx_empty; - unsigned char maccc; - unsigned char tx_fullup; - unsigned char tx_active; - unsigned char tx_bad_runt; - struct timer_list tx_timeout; - int timeout_active; - int port_aaui; - int chipid; - struct macio_dev *mdev; - spinlock_t lock; -}; - -/* - * Number of bytes of private data per MACE: allow enough for - * the rx and tx dma commands plus a branch dma command each, - * and another 16 bytes to allow us to align the dma command - * buffers on a 16 byte boundary. - */ -#define PRIV_BYTES (sizeof(struct mace_data) \ - + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd)) - -static int mace_open(struct net_device *dev); -static int mace_close(struct net_device *dev); -static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev); -static void mace_set_multicast(struct net_device *dev); -static void mace_reset(struct net_device *dev); -static int mace_set_address(struct net_device *dev, void *addr); -static irqreturn_t mace_interrupt(int irq, void *dev_id); -static irqreturn_t mace_txdma_intr(int irq, void *dev_id); -static irqreturn_t mace_rxdma_intr(int irq, void *dev_id); -static void mace_set_timeout(struct net_device *dev); -static void mace_tx_timeout(unsigned long data); -static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma); -static inline void mace_clean_rings(struct mace_data *mp); -static void __mace_set_address(struct net_device *dev, void *addr); - -/* - * If we can't get a skbuff when we need it, we use this area for DMA. - */ -static unsigned char *dummy_buf; - -static const struct net_device_ops mace_netdev_ops = { - .ndo_open = mace_open, - .ndo_stop = mace_close, - .ndo_start_xmit = mace_xmit_start, - .ndo_set_multicast_list = mace_set_multicast, - .ndo_set_mac_address = mace_set_address, - .ndo_change_mtu = eth_change_mtu, - .ndo_validate_addr = eth_validate_addr, -}; - -static int __devinit mace_probe(struct macio_dev *mdev, const struct of_device_id *match) -{ - struct device_node *mace = macio_get_of_node(mdev); - struct net_device *dev; - struct mace_data *mp; - const unsigned char *addr; - int j, rev, rc = -EBUSY; - - if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) { - printk(KERN_ERR "can't use MACE %s: need 3 addrs and 3 irqs\n", - mace->full_name); - return -ENODEV; - } - - addr = of_get_property(mace, "mac-address", NULL); - if (addr == NULL) { - addr = of_get_property(mace, "local-mac-address", NULL); - if (addr == NULL) { - printk(KERN_ERR "Can't get mac-address for MACE %s\n", - mace->full_name); - return -ENODEV; - } - } - - /* - * lazy allocate the driver-wide dummy buffer. (Note that we - * never have more than one MACE in the system anyway) - */ - if (dummy_buf == NULL) { - dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL); - if (dummy_buf == NULL) { - printk(KERN_ERR "MACE: couldn't allocate dummy buffer\n"); - return -ENOMEM; - } - } - - if (macio_request_resources(mdev, "mace")) { - printk(KERN_ERR "MACE: can't request IO resources !\n"); - return -EBUSY; - } - - dev = alloc_etherdev(PRIV_BYTES); - if (!dev) { - printk(KERN_ERR "MACE: can't allocate ethernet device !\n"); - rc = -ENOMEM; - goto err_release; - } - SET_NETDEV_DEV(dev, &mdev->ofdev.dev); - - mp = netdev_priv(dev); - mp->mdev = mdev; - macio_set_drvdata(mdev, dev); - - dev->base_addr = macio_resource_start(mdev, 0); - mp->mace = ioremap(dev->base_addr, 0x1000); - if (mp->mace == NULL) { - printk(KERN_ERR "MACE: can't map IO resources !\n"); - rc = -ENOMEM; - goto err_free; - } - dev->irq = macio_irq(mdev, 0); - - rev = addr[0] == 0 && addr[1] == 0xA0; - for (j = 0; j < 6; ++j) { - dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j]; - } - mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) | - in_8(&mp->mace->chipid_lo); - - - mp = netdev_priv(dev); - mp->maccc = ENXMT | ENRCV; - - mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000); - if (mp->tx_dma == NULL) { - printk(KERN_ERR "MACE: can't map TX DMA resources !\n"); - rc = -ENOMEM; - goto err_unmap_io; - } - mp->tx_dma_intr = macio_irq(mdev, 1); - - mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000); - if (mp->rx_dma == NULL) { - printk(KERN_ERR "MACE: can't map RX DMA resources !\n"); - rc = -ENOMEM; - goto err_unmap_tx_dma; - } - mp->rx_dma_intr = macio_irq(mdev, 2); - - mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1); - mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1; - - memset((char *) mp->tx_cmds, 0, - (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd)); - init_timer(&mp->tx_timeout); - spin_lock_init(&mp->lock); - mp->timeout_active = 0; - - if (port_aaui >= 0) - mp->port_aaui = port_aaui; - else { - /* Apple Network Server uses the AAUI port */ - if (of_machine_is_compatible("AAPL,ShinerESB")) - mp->port_aaui = 1; - else { -#ifdef CONFIG_MACE_AAUI_PORT - mp->port_aaui = 1; -#else - mp->port_aaui = 0; -#endif - } - } - - dev->netdev_ops = &mace_netdev_ops; - - /* - * Most of what is below could be moved to mace_open() - */ - mace_reset(dev); - - rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev); - if (rc) { - printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq); - goto err_unmap_rx_dma; - } - rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev); - if (rc) { - printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr); - goto err_free_irq; - } - rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev); - if (rc) { - printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr); - goto err_free_tx_irq; - } - - rc = register_netdev(dev); - if (rc) { - printk(KERN_ERR "MACE: Cannot register net device, aborting.\n"); - goto err_free_rx_irq; - } - - printk(KERN_INFO "%s: MACE at %pM, chip revision %d.%d\n", - dev->name, dev->dev_addr, - mp->chipid >> 8, mp->chipid & 0xff); - - return 0; - - err_free_rx_irq: - free_irq(macio_irq(mdev, 2), dev); - err_free_tx_irq: - free_irq(macio_irq(mdev, 1), dev); - err_free_irq: - free_irq(macio_irq(mdev, 0), dev); - err_unmap_rx_dma: - iounmap(mp->rx_dma); - err_unmap_tx_dma: - iounmap(mp->tx_dma); - err_unmap_io: - iounmap(mp->mace); - err_free: - free_netdev(dev); - err_release: - macio_release_resources(mdev); - - return rc; -} - -static int __devexit mace_remove(struct macio_dev *mdev) -{ - struct net_device *dev = macio_get_drvdata(mdev); - struct mace_data *mp; - - BUG_ON(dev == NULL); - - macio_set_drvdata(mdev, NULL); - - mp = netdev_priv(dev); - - unregister_netdev(dev); - - free_irq(dev->irq, dev); - free_irq(mp->tx_dma_intr, dev); - free_irq(mp->rx_dma_intr, dev); - - iounmap(mp->rx_dma); - iounmap(mp->tx_dma); - iounmap(mp->mace); - - free_netdev(dev); - - macio_release_resources(mdev); - - return 0; -} - -static void dbdma_reset(volatile struct dbdma_regs __iomem *dma) -{ - int i; - - out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16); - - /* - * Yes this looks peculiar, but apparently it needs to be this - * way on some machines. - */ - for (i = 200; i > 0; --i) - if (ld_le32(&dma->control) & RUN) - udelay(1); -} - -static void mace_reset(struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - int i; - - /* soft-reset the chip */ - i = 200; - while (--i) { - out_8(&mb->biucc, SWRST); - if (in_8(&mb->biucc) & SWRST) { - udelay(10); - continue; - } - break; - } - if (!i) { - printk(KERN_ERR "mace: cannot reset chip!\n"); - return; - } - - out_8(&mb->imr, 0xff); /* disable all intrs for now */ - i = in_8(&mb->ir); - out_8(&mb->maccc, 0); /* turn off tx, rx */ - - out_8(&mb->biucc, XMTSP_64); - out_8(&mb->utr, RTRD); - out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST); - out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */ - out_8(&mb->rcvfc, 0); - - /* load up the hardware address */ - __mace_set_address(dev, dev->dev_addr); - - /* clear the multicast filter */ - if (mp->chipid == BROKEN_ADDRCHG_REV) - out_8(&mb->iac, LOGADDR); - else { - out_8(&mb->iac, ADDRCHG | LOGADDR); - while ((in_8(&mb->iac) & ADDRCHG) != 0) - ; - } - for (i = 0; i < 8; ++i) - out_8(&mb->ladrf, 0); - - /* done changing address */ - if (mp->chipid != BROKEN_ADDRCHG_REV) - out_8(&mb->iac, 0); - - if (mp->port_aaui) - out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO); - else - out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO); -} - -static void __mace_set_address(struct net_device *dev, void *addr) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - unsigned char *p = addr; - int i; - - /* load up the hardware address */ - if (mp->chipid == BROKEN_ADDRCHG_REV) - out_8(&mb->iac, PHYADDR); - else { - out_8(&mb->iac, ADDRCHG | PHYADDR); - while ((in_8(&mb->iac) & ADDRCHG) != 0) - ; - } - for (i = 0; i < 6; ++i) - out_8(&mb->padr, dev->dev_addr[i] = p[i]); - if (mp->chipid != BROKEN_ADDRCHG_REV) - out_8(&mb->iac, 0); -} - -static int mace_set_address(struct net_device *dev, void *addr) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - unsigned long flags; - - spin_lock_irqsave(&mp->lock, flags); - - __mace_set_address(dev, addr); - - /* note: setting ADDRCHG clears ENRCV */ - out_8(&mb->maccc, mp->maccc); - - spin_unlock_irqrestore(&mp->lock, flags); - return 0; -} - -static inline void mace_clean_rings(struct mace_data *mp) -{ - int i; - - /* free some skb's */ - for (i = 0; i < N_RX_RING; ++i) { - if (mp->rx_bufs[i] != NULL) { - dev_kfree_skb(mp->rx_bufs[i]); - mp->rx_bufs[i] = NULL; - } - } - for (i = mp->tx_empty; i != mp->tx_fill; ) { - dev_kfree_skb(mp->tx_bufs[i]); - if (++i >= N_TX_RING) - i = 0; - } -} - -static int mace_open(struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - volatile struct dbdma_regs __iomem *rd = mp->rx_dma; - volatile struct dbdma_regs __iomem *td = mp->tx_dma; - volatile struct dbdma_cmd *cp; - int i; - struct sk_buff *skb; - unsigned char *data; - - /* reset the chip */ - mace_reset(dev); - - /* initialize list of sk_buffs for receiving and set up recv dma */ - mace_clean_rings(mp); - memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd)); - cp = mp->rx_cmds; - for (i = 0; i < N_RX_RING - 1; ++i) { - skb = dev_alloc_skb(RX_BUFLEN + 2); - if (!skb) { - data = dummy_buf; - } else { - skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */ - data = skb->data; - } - mp->rx_bufs[i] = skb; - st_le16(&cp->req_count, RX_BUFLEN); - st_le16(&cp->command, INPUT_LAST + INTR_ALWAYS); - st_le32(&cp->phy_addr, virt_to_bus(data)); - cp->xfer_status = 0; - ++cp; - } - mp->rx_bufs[i] = NULL; - st_le16(&cp->command, DBDMA_STOP); - mp->rx_fill = i; - mp->rx_empty = 0; - - /* Put a branch back to the beginning of the receive command list */ - ++cp; - st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS); - st_le32(&cp->cmd_dep, virt_to_bus(mp->rx_cmds)); - - /* start rx dma */ - out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ - out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds)); - out_le32(&rd->control, (RUN << 16) | RUN); - - /* put a branch at the end of the tx command list */ - cp = mp->tx_cmds + NCMDS_TX * N_TX_RING; - st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS); - st_le32(&cp->cmd_dep, virt_to_bus(mp->tx_cmds)); - - /* reset tx dma */ - out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); - out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds)); - mp->tx_fill = 0; - mp->tx_empty = 0; - mp->tx_fullup = 0; - mp->tx_active = 0; - mp->tx_bad_runt = 0; - - /* turn it on! */ - out_8(&mb->maccc, mp->maccc); - /* enable all interrupts except receive interrupts */ - out_8(&mb->imr, RCVINT); - - return 0; -} - -static int mace_close(struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - volatile struct dbdma_regs __iomem *rd = mp->rx_dma; - volatile struct dbdma_regs __iomem *td = mp->tx_dma; - - /* disable rx and tx */ - out_8(&mb->maccc, 0); - out_8(&mb->imr, 0xff); /* disable all intrs */ - - /* disable rx and tx dma */ - st_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ - st_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ - - mace_clean_rings(mp); - - return 0; -} - -static inline void mace_set_timeout(struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - - if (mp->timeout_active) - del_timer(&mp->tx_timeout); - mp->tx_timeout.expires = jiffies + TX_TIMEOUT; - mp->tx_timeout.function = mace_tx_timeout; - mp->tx_timeout.data = (unsigned long) dev; - add_timer(&mp->tx_timeout); - mp->timeout_active = 1; -} - -static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct dbdma_regs __iomem *td = mp->tx_dma; - volatile struct dbdma_cmd *cp, *np; - unsigned long flags; - int fill, next, len; - - /* see if there's a free slot in the tx ring */ - spin_lock_irqsave(&mp->lock, flags); - fill = mp->tx_fill; - next = fill + 1; - if (next >= N_TX_RING) - next = 0; - if (next == mp->tx_empty) { - netif_stop_queue(dev); - mp->tx_fullup = 1; - spin_unlock_irqrestore(&mp->lock, flags); - return NETDEV_TX_BUSY; /* can't take it at the moment */ - } - spin_unlock_irqrestore(&mp->lock, flags); - - /* partially fill in the dma command block */ - len = skb->len; - if (len > ETH_FRAME_LEN) { - printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len); - len = ETH_FRAME_LEN; - } - mp->tx_bufs[fill] = skb; - cp = mp->tx_cmds + NCMDS_TX * fill; - st_le16(&cp->req_count, len); - st_le32(&cp->phy_addr, virt_to_bus(skb->data)); - - np = mp->tx_cmds + NCMDS_TX * next; - out_le16(&np->command, DBDMA_STOP); - - /* poke the tx dma channel */ - spin_lock_irqsave(&mp->lock, flags); - mp->tx_fill = next; - if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) { - out_le16(&cp->xfer_status, 0); - out_le16(&cp->command, OUTPUT_LAST); - out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); - ++mp->tx_active; - mace_set_timeout(dev); - } - if (++next >= N_TX_RING) - next = 0; - if (next == mp->tx_empty) - netif_stop_queue(dev); - spin_unlock_irqrestore(&mp->lock, flags); - - return NETDEV_TX_OK; -} - -static void mace_set_multicast(struct net_device *dev) -{ - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - int i; - u32 crc; - unsigned long flags; - - spin_lock_irqsave(&mp->lock, flags); - mp->maccc &= ~PROM; - if (dev->flags & IFF_PROMISC) { - mp->maccc |= PROM; - } else { - unsigned char multicast_filter[8]; - struct netdev_hw_addr *ha; - - if (dev->flags & IFF_ALLMULTI) { - for (i = 0; i < 8; i++) - multicast_filter[i] = 0xff; - } else { - for (i = 0; i < 8; i++) - multicast_filter[i] = 0; - netdev_for_each_mc_addr(ha, dev) { - crc = ether_crc_le(6, ha->addr); - i = crc >> 26; /* bit number in multicast_filter */ - multicast_filter[i >> 3] |= 1 << (i & 7); - } - } -#if 0 - printk("Multicast filter :"); - for (i = 0; i < 8; i++) - printk("%02x ", multicast_filter[i]); - printk("\n"); -#endif - - if (mp->chipid == BROKEN_ADDRCHG_REV) - out_8(&mb->iac, LOGADDR); - else { - out_8(&mb->iac, ADDRCHG | LOGADDR); - while ((in_8(&mb->iac) & ADDRCHG) != 0) - ; - } - for (i = 0; i < 8; ++i) - out_8(&mb->ladrf, multicast_filter[i]); - if (mp->chipid != BROKEN_ADDRCHG_REV) - out_8(&mb->iac, 0); - } - /* reset maccc */ - out_8(&mb->maccc, mp->maccc); - spin_unlock_irqrestore(&mp->lock, flags); -} - -static void mace_handle_misc_intrs(struct mace_data *mp, int intr, struct net_device *dev) -{ - volatile struct mace __iomem *mb = mp->mace; - static int mace_babbles, mace_jabbers; - - if (intr & MPCO) - dev->stats.rx_missed_errors += 256; - dev->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */ - if (intr & RNTPCO) - dev->stats.rx_length_errors += 256; - dev->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */ - if (intr & CERR) - ++dev->stats.tx_heartbeat_errors; - if (intr & BABBLE) - if (mace_babbles++ < 4) - printk(KERN_DEBUG "mace: babbling transmitter\n"); - if (intr & JABBER) - if (mace_jabbers++ < 4) - printk(KERN_DEBUG "mace: jabbering transceiver\n"); -} - -static irqreturn_t mace_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - volatile struct dbdma_regs __iomem *td = mp->tx_dma; - volatile struct dbdma_cmd *cp; - int intr, fs, i, stat, x; - int xcount, dstat; - unsigned long flags; - /* static int mace_last_fs, mace_last_xcount; */ - - spin_lock_irqsave(&mp->lock, flags); - intr = in_8(&mb->ir); /* read interrupt register */ - in_8(&mb->xmtrc); /* get retries */ - mace_handle_misc_intrs(mp, intr, dev); - - i = mp->tx_empty; - while (in_8(&mb->pr) & XMTSV) { - del_timer(&mp->tx_timeout); - mp->timeout_active = 0; - /* - * Clear any interrupt indication associated with this status - * word. This appears to unlatch any error indication from - * the DMA controller. - */ - intr = in_8(&mb->ir); - if (intr != 0) - mace_handle_misc_intrs(mp, intr, dev); - if (mp->tx_bad_runt) { - fs = in_8(&mb->xmtfs); - mp->tx_bad_runt = 0; - out_8(&mb->xmtfc, AUTO_PAD_XMIT); - continue; - } - dstat = ld_le32(&td->status); - /* stop DMA controller */ - out_le32(&td->control, RUN << 16); - /* - * xcount is the number of complete frames which have been - * written to the fifo but for which status has not been read. - */ - xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; - if (xcount == 0 || (dstat & DEAD)) { - /* - * If a packet was aborted before the DMA controller has - * finished transferring it, it seems that there are 2 bytes - * which are stuck in some buffer somewhere. These will get - * transmitted as soon as we read the frame status (which - * reenables the transmit data transfer request). Turning - * off the DMA controller and/or resetting the MACE doesn't - * help. So we disable auto-padding and FCS transmission - * so the two bytes will only be a runt packet which should - * be ignored by other stations. - */ - out_8(&mb->xmtfc, DXMTFCS); - } - fs = in_8(&mb->xmtfs); - if ((fs & XMTSV) == 0) { - printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n", - fs, xcount, dstat); - mace_reset(dev); - /* - * XXX mace likes to hang the machine after a xmtfs error. - * This is hard to reproduce, reseting *may* help - */ - } - cp = mp->tx_cmds + NCMDS_TX * i; - stat = ld_le16(&cp->xfer_status); - if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) { - /* - * Check whether there were in fact 2 bytes written to - * the transmit FIFO. - */ - udelay(1); - x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; - if (x != 0) { - /* there were two bytes with an end-of-packet indication */ - mp->tx_bad_runt = 1; - mace_set_timeout(dev); - } else { - /* - * Either there weren't the two bytes buffered up, or they - * didn't have an end-of-packet indication. - * We flush the transmit FIFO just in case (by setting the - * XMTFWU bit with the transmitter disabled). - */ - out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT); - out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU); - udelay(1); - out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT); - out_8(&mb->xmtfc, AUTO_PAD_XMIT); - } - } - /* dma should have finished */ - if (i == mp->tx_fill) { - printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n", - fs, xcount, dstat); - continue; - } - /* Update stats */ - if (fs & (UFLO|LCOL|LCAR|RTRY)) { - ++dev->stats.tx_errors; - if (fs & LCAR) - ++dev->stats.tx_carrier_errors; - if (fs & (UFLO|LCOL|RTRY)) - ++dev->stats.tx_aborted_errors; - } else { - dev->stats.tx_bytes += mp->tx_bufs[i]->len; - ++dev->stats.tx_packets; - } - dev_kfree_skb_irq(mp->tx_bufs[i]); - --mp->tx_active; - if (++i >= N_TX_RING) - i = 0; -#if 0 - mace_last_fs = fs; - mace_last_xcount = xcount; -#endif - } - - if (i != mp->tx_empty) { - mp->tx_fullup = 0; - netif_wake_queue(dev); - } - mp->tx_empty = i; - i += mp->tx_active; - if (i >= N_TX_RING) - i -= N_TX_RING; - if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) { - do { - /* set up the next one */ - cp = mp->tx_cmds + NCMDS_TX * i; - out_le16(&cp->xfer_status, 0); - out_le16(&cp->command, OUTPUT_LAST); - ++mp->tx_active; - if (++i >= N_TX_RING) - i = 0; - } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE); - out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); - mace_set_timeout(dev); - } - spin_unlock_irqrestore(&mp->lock, flags); - return IRQ_HANDLED; -} - -static void mace_tx_timeout(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct mace_data *mp = netdev_priv(dev); - volatile struct mace __iomem *mb = mp->mace; - volatile struct dbdma_regs __iomem *td = mp->tx_dma; - volatile struct dbdma_regs __iomem *rd = mp->rx_dma; - volatile struct dbdma_cmd *cp; - unsigned long flags; - int i; - - spin_lock_irqsave(&mp->lock, flags); - mp->timeout_active = 0; - if (mp->tx_active == 0 && !mp->tx_bad_runt) - goto out; - - /* update various counters */ - mace_handle_misc_intrs(mp, in_8(&mb->ir), dev); - - cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty; - - /* turn off both tx and rx and reset the chip */ - out_8(&mb->maccc, 0); - printk(KERN_ERR "mace: transmit timeout - resetting\n"); - dbdma_reset(td); - mace_reset(dev); - - /* restart rx dma */ - cp = bus_to_virt(ld_le32(&rd->cmdptr)); - dbdma_reset(rd); - out_le16(&cp->xfer_status, 0); - out_le32(&rd->cmdptr, virt_to_bus(cp)); - out_le32(&rd->control, (RUN << 16) | RUN); - - /* fix up the transmit side */ - i = mp->tx_empty; - mp->tx_active = 0; - ++dev->stats.tx_errors; - if (mp->tx_bad_runt) { - mp->tx_bad_runt = 0; - } else if (i != mp->tx_fill) { - dev_kfree_skb(mp->tx_bufs[i]); - if (++i >= N_TX_RING) - i = 0; - mp->tx_empty = i; - } - mp->tx_fullup = 0; - netif_wake_queue(dev); - if (i != mp->tx_fill) { - cp = mp->tx_cmds + NCMDS_TX * i; - out_le16(&cp->xfer_status, 0); - out_le16(&cp->command, OUTPUT_LAST); - out_le32(&td->cmdptr, virt_to_bus(cp)); - out_le32(&td->control, (RUN << 16) | RUN); - ++mp->tx_active; - mace_set_timeout(dev); - } - - /* turn it back on */ - out_8(&mb->imr, RCVINT); - out_8(&mb->maccc, mp->maccc); - -out: - spin_unlock_irqrestore(&mp->lock, flags); -} - -static irqreturn_t mace_txdma_intr(int irq, void *dev_id) -{ - return IRQ_HANDLED; -} - -static irqreturn_t mace_rxdma_intr(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct mace_data *mp = netdev_priv(dev); - volatile struct dbdma_regs __iomem *rd = mp->rx_dma; - volatile struct dbdma_cmd *cp, *np; - int i, nb, stat, next; - struct sk_buff *skb; - unsigned frame_status; - static int mace_lost_status; - unsigned char *data; - unsigned long flags; - - spin_lock_irqsave(&mp->lock, flags); - for (i = mp->rx_empty; i != mp->rx_fill; ) { - cp = mp->rx_cmds + i; - stat = ld_le16(&cp->xfer_status); - if ((stat & ACTIVE) == 0) { - next = i + 1; - if (next >= N_RX_RING) - next = 0; - np = mp->rx_cmds + next; - if (next != mp->rx_fill && - (ld_le16(&np->xfer_status) & ACTIVE) != 0) { - printk(KERN_DEBUG "mace: lost a status word\n"); - ++mace_lost_status; - } else - break; - } - nb = ld_le16(&cp->req_count) - ld_le16(&cp->res_count); - out_le16(&cp->command, DBDMA_STOP); - /* got a packet, have a look at it */ - skb = mp->rx_bufs[i]; - if (!skb) { - ++dev->stats.rx_dropped; - } else if (nb > 8) { - data = skb->data; - frame_status = (data[nb-3] << 8) + data[nb-4]; - if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) { - ++dev->stats.rx_errors; - if (frame_status & RS_OFLO) - ++dev->stats.rx_over_errors; - if (frame_status & RS_FRAMERR) - ++dev->stats.rx_frame_errors; - if (frame_status & RS_FCSERR) - ++dev->stats.rx_crc_errors; - } else { - /* Mace feature AUTO_STRIP_RCV is on by default, dropping the - * FCS on frames with 802.3 headers. This means that Ethernet - * frames have 8 extra octets at the end, while 802.3 frames - * have only 4. We need to correctly account for this. */ - if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */ - nb -= 4; - else /* Ethernet header; mace includes FCS */ - nb -= 8; - skb_put(skb, nb); - skb->protocol = eth_type_trans(skb, dev); - dev->stats.rx_bytes += skb->len; - netif_rx(skb); - mp->rx_bufs[i] = NULL; - ++dev->stats.rx_packets; - } - } else { - ++dev->stats.rx_errors; - ++dev->stats.rx_length_errors; - } - - /* advance to next */ - if (++i >= N_RX_RING) - i = 0; - } - mp->rx_empty = i; - - i = mp->rx_fill; - for (;;) { - next = i + 1; - if (next >= N_RX_RING) - next = 0; - if (next == mp->rx_empty) - break; - cp = mp->rx_cmds + i; - skb = mp->rx_bufs[i]; - if (!skb) { - skb = dev_alloc_skb(RX_BUFLEN + 2); - if (skb) { - skb_reserve(skb, 2); - mp->rx_bufs[i] = skb; - } - } - st_le16(&cp->req_count, RX_BUFLEN); - data = skb? skb->data: dummy_buf; - st_le32(&cp->phy_addr, virt_to_bus(data)); - out_le16(&cp->xfer_status, 0); - out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS); -#if 0 - if ((ld_le32(&rd->status) & ACTIVE) != 0) { - out_le32(&rd->control, (PAUSE << 16) | PAUSE); - while ((in_le32(&rd->status) & ACTIVE) != 0) - ; - } -#endif - i = next; - } - if (i != mp->rx_fill) { - out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE)); - mp->rx_fill = i; - } - spin_unlock_irqrestore(&mp->lock, flags); - return IRQ_HANDLED; -} - -static struct of_device_id mace_match[] = -{ - { - .name = "mace", - }, - {}, -}; -MODULE_DEVICE_TABLE (of, mace_match); - -static struct macio_driver mace_driver = -{ - .driver = { - .name = "mace", - .owner = THIS_MODULE, - .of_match_table = mace_match, - }, - .probe = mace_probe, - .remove = mace_remove, -}; - - -static int __init mace_init(void) -{ - return macio_register_driver(&mace_driver); -} - -static void __exit mace_cleanup(void) -{ - macio_unregister_driver(&mace_driver); - - kfree(dummy_buf); - dummy_buf = NULL; -} - -MODULE_AUTHOR("Paul Mackerras"); -MODULE_DESCRIPTION("PowerMac MACE driver."); -module_param(port_aaui, int, 0); -MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)"); -MODULE_LICENSE("GPL"); - -module_init(mace_init); -module_exit(mace_cleanup); |