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From: Stephen Hemminger on 27 Jul 2010 16:50
On Tue, 27 Jul 2010 12:22:11 -0700
Joe Perches <joe(a)perches.com> wrote:

>
> +static struct sk_buff *bfin_alloc_skb(void)
> +{
> + /* allocate a new skb */
> + struct sk_buff *new_skb = dev_alloc_skb(PKT_BUF_SIZE + NET_IP_ALIGN);
> +
> + if (!new_skb)
> + return NULL;
> +
> + skb_reserve(new_skb, NET_IP_ALIGN);

Why not use netdev_alloc_skb_ip_align ?

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From: Joe Perches on 27 Jul 2010 17:00
On Tue, 2010-07-27 at 13:44 -0700, Stephen Hemminger wrote:
> On Tue, 27 Jul 2010 12:22:11 -0700
> Joe Perches <joe(a)perches.com> wrote:
> > +static struct sk_buff *bfin_alloc_skb(void)
> > +{
> > + /* allocate a new skb */
> > + struct sk_buff *new_skb = dev_alloc_skb(PKT_BUF_SIZE + NET_IP_ALIGN);
> > +
> > + if (!new_skb)
> > + return NULL;
> > +
> > + skb_reserve(new_skb, NET_IP_ALIGN);
>
> Why not use netdev_alloc_skb_ip_align ?

I was consolidating duplicated code.

It could be changed, but right now, desc_list_init isn't
passed a struct netdevice.

Perhaps you'll submit that as a follow-on?


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From: Hennerich, Michael on 28 Jul 2010 09:30
Joe Perches wrote on 2010-07-27:
> And some assorted neatening for checkpatch:
>
> 80 column reformatting (mostly comments)
> argument alignment
> couple of spelling/grammar typos corrected
>
> Added bfin_alloc_skb to centralize allocation/dcache invalidation
> Added get_mac_addr for symmetry
>
> $ ./scripts/checkpatch.pl -f drivers/net/bfin_mac.c | grep "^total:"
> total: 2 errors, 25 warnings, 1723 lines checked $
> ./scripts/checkpatch.pl -f drivers/net/bfin_mac.c | grep "^total:"
> total: 0 errors, 0 warnings, 1743 lines checked
>
> Uncompiled, untested.

One little thing -

drivers/net/bfin_mac.c: In function ‘bfin_alloc_skb’:
drivers/net/bfin_mac.c:89: error: ‘PKT_BUF_SIZE’ undeclared (first use in this function)

If you change the define PKT_BUF_SZ to match what is being used in this patch
- then everything compiles and works cleanly.

Acked-by: Michael Hennerich <michael.hennerich(a)analog.com>

>
> Signed-off-by: Joe Perches <joe(a)perches.com>
> ---
> drivers/net/bfin_mac.c | 284
> ++++++++++++++++++++++++++--------------
> --------
> 1 files changed, 152 insertions(+), 132 deletions(-)
> diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c index
> 012613f..46a4576 100644
> --- a/drivers/net/bfin_mac.c
> +++ b/drivers/net/bfin_mac.c
> @@ -8,6 +8,8 @@
> * Licensed under the GPL-2 or later.
> */
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +
> #include <linux/init.h>
> #include <linux/module.h>
> #include <linux/kernel.h>
> @@ -81,6 +83,24 @@ static u16 pin_req[] = P_RMII0; static u16
> pin_req[] = P_MII0; #endif
>
> +static struct sk_buff *bfin_alloc_skb(void) { + /* allocate a new skb
> */ + struct sk_buff *new_skb = dev_alloc_skb(PKT_BUF_SIZE +
> NET_IP_ALIGN); + + if (!new_skb) + return NULL; +
> + skb_reserve(new_skb, NET_IP_ALIGN); + /* Invalidate the data cache of
> skb->data range when it is write back + * cache. It will prevent
> overwriting the new data from DMA + */
> + blackfin_dcache_invalidate_range((unsigned long)new_skb->head, +
> (unsigned long)new_skb->end); + + return new_skb; +} +
> static void desc_list_free(void)
> {
> struct net_dma_desc_rx *r;
> @@ -132,14 +152,14 @@ static int desc_list_init(void) #endif
>
> tx_desc = bfin_mac_alloc(&dma_handle,
> - sizeof(struct net_dma_desc_tx) * - CONFIG_BFIN_TX_DESC_NUM);
> + sizeof(struct net_dma_desc_tx) * + CONFIG_BFIN_TX_DESC_NUM);
> if (tx_desc == NULL)
> goto init_error;
>
> rx_desc = bfin_mac_alloc(&dma_handle,
> - sizeof(struct net_dma_desc_rx) * - CONFIG_BFIN_RX_DESC_NUM);
> + sizeof(struct net_dma_desc_rx) * + CONFIG_BFIN_RX_DESC_NUM);
> if (rx_desc == NULL)
> goto init_error;
> @@ -192,19 +212,11 @@ static int desc_list_init(void)
> struct dma_descriptor *a = &(r->desc_a);
> struct dma_descriptor *b = &(r->desc_b);
> - /* allocate a new skb for next time receive */
> - new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
> + new_skb = bfin_alloc_skb();
> if (!new_skb) {
> - printk(KERN_NOTICE DRV_NAME
> - ": init: low on mem - packet dropped\n");
> + pr_notice("init: low on mem - packet dropped\n");
> goto init_error;
> }
> - skb_reserve(new_skb, NET_IP_ALIGN);
> - /* Invidate the data cache of skb->data range when it is
> write back
> - * cache. It will prevent overwritting the new data from
> DMA
> - */
> - blackfin_dcache_invalidate_range((unsigned long)new_skb-
> head, - (unsigned long)new_skb->end); r->skb = new_skb;
>>
> /* @@ -229,8 +241,8 @@ static int desc_list_init(void) * 6 half
> words is desc size * large desc flow */
> - b->config = DMAEN | WNR | WDSIZE_32 | DI_EN |
> - NDSIZE_6 | DMAFLOW_LARGE;
> + b->config = (DMAEN | WNR | WDSIZE_32 | DI_EN |
> + NDSIZE_6 | DMAFLOW_LARGE);
> b->start_addr = (unsigned long)(&(r->status));
> b->x_count = 0;
> @@ -246,7 +258,7 @@ static int desc_list_init(void)
>
> init_error:
> desc_list_free();
> - printk(KERN_ERR DRV_NAME ": kmalloc failed\n");
> + pr_err("kmalloc failed\n");
> return -ENOMEM;
> }
> @@ -263,12 +275,11 @@ static int bfin_mdio_poll(void)
>
> /* poll the STABUSY bit */ while ((bfin_read_EMAC_STAADD()) &
> STABUSY) { - udelay(1); if (timeout_cnt-- < 0) {
> - printk(KERN_ERR DRV_NAME
> - ": wait MDC/MDIO transaction to complete timeout\n");
> + pr_err("wait MDC/MDIO transaction to complete
> timeout\n");
> return -ETIMEDOUT; } + udelay(1); }
>
> return 0;
> @@ -284,15 +295,15 @@ static int bfin_mdiobus_read(struct mii_bus
> *bus, int phy_addr, int regnum)
> return ret;
>
> /* read mode */
> - bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
> + bfin_write_EMAC_STAADD((SET_PHYAD((u16) phy_addr) |
> SET_REGAD((u16) regnum) |
> - STABUSY);
> + STABUSY));
>
> ret = bfin_mdio_poll();
> if (ret)
> return ret;
> - return (int) bfin_read_EMAC_STADAT();
> + return (int)bfin_read_EMAC_STADAT();
> }
>
> /* Write an off-chip register in a PHY through the MDC/MDIO port */
> @@ -308,10 +319,10 @@ static int bfin_mdiobus_write(struct mii_bus
> *bus, int phy_addr, int regnum,
> bfin_write_EMAC_STADAT((u32) value);
>
> /* write mode */
> - bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
> + bfin_write_EMAC_STAADD((SET_PHYAD((u16) phy_addr) |
> SET_REGAD((u16) regnum) |
> STAOP |
> - STABUSY);
> + STABUSY));
>
> return bfin_mdio_poll();
> }
> @@ -356,9 +367,9 @@ static void bfin_mac_adjust_link(struct net_device
> *dev)
> opmode &= ~(RMII_10);
> break;
> default:
> - printk(KERN_WARNING
> - "%s: Ack! Speed (%d) is not 10/100!\n",
> - DRV_NAME, phydev->speed);
> + netdev_warn(dev,
> + "Ack! Speed (%d) is not 10/100!\n",
> + phydev->speed);
> break;
> }
> bfin_write_EMAC_OPMODE(opmode);
> @@ -382,7 +393,7 @@ static void bfin_mac_adjust_link(struct net_device
> *dev)
> if (new_state) {
> u32 opmode = bfin_read_EMAC_OPMODE();
> phy_print_status(phydev);
> - pr_debug("EMAC_OPMODE = 0x%08x\n", opmode);
> + netdev_dbg(dev, "EMAC_OPMODE = 0x%08x\n", opmode);
> }
>
> spin_unlock_irqrestore(&lp->lock, flags); @@ -421,35 +432,35 @@ static
> int mii_probe(struct net_device *dev) break; /* found it */ }
> - /* now we are supposed to have a proper phydev, to attach to... */
> + /* now we are supposed to have a proper phydev to attach to... */
> if (!phydev) {
> - printk(KERN_INFO "%s: Don't found any phy device at all\n",
> - dev->name); + netdev_info(dev, "No PHY device found\n");
> return -ENODEV;
> }
>
> #if defined(CONFIG_BFIN_MAC_RMII)
> phydev = phy_connect(dev, dev_name(&phydev->dev),
> &bfin_mac_adjust_link,
> - 0, PHY_INTERFACE_MODE_RMII);
> + 0, PHY_INTERFACE_MODE_RMII);
> #else
> phydev = phy_connect(dev, dev_name(&phydev->dev),
> &bfin_mac_adjust_link,
> - 0, PHY_INTERFACE_MODE_MII);
> + 0, PHY_INTERFACE_MODE_MII);
> #endif
>
> if (IS_ERR(phydev)) { - printk(KERN_ERR "%s: Could not attach to
> PHY\n", dev- name); + netdev_err(dev, "Could not attach to PHY\n");
> return PTR_ERR(phydev); }
>
> /* mask with MAC supported features */
> - phydev->supported &= (SUPPORTED_10baseT_Half
> - | SUPPORTED_10baseT_Full
> - | SUPPORTED_100baseT_Half
> - | SUPPORTED_100baseT_Full
> - | SUPPORTED_Autoneg
> - | SUPPORTED_Pause | SUPPORTED_Asym_Pause
> - | SUPPORTED_MII
> - | SUPPORTED_TP);
> + phydev->supported &= (SUPPORTED_10baseT_Half |
> + SUPPORTED_10baseT_Full |
> + SUPPORTED_100baseT_Half |
> + SUPPORTED_100baseT_Full |
> + SUPPORTED_Autoneg |
> + SUPPORTED_Pause |
> + SUPPORTED_Asym_Pause |
> + SUPPORTED_MII |
> + SUPPORTED_TP);
>
> phydev->advertising = phydev->supported;
> @@ -458,11 +469,11 @@ static int mii_probe(struct net_device *dev)
> lp->old_duplex = -1;
> lp->phydev = phydev;
> - printk(KERN_INFO "%s: attached PHY driver [%s] " -
> "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)" -
> "@sclk=%dMHz)\n", - DRV_NAME, phydev->drv->name,
> dev_name(&phydev->dev), phydev->irq, - MDC_CLK, mdc_div,
> sclk/1000000); + netdev_info(dev, "attached PHY driver [%s] " +
> "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)" +
> "@sclk=%dMHz)\n", + phydev->drv->name, dev_name(&phydev->dev),
> phydev->irq, + MDC_CLK, mdc_div, sclk/1000000);
>
> return 0;
> }
> @@ -514,7 +525,7 @@ static void bfin_mac_ethtool_getdrvinfo(struct
> net_device *dev, }
>
> static void bfin_mac_ethtool_getwol(struct net_device *dev,
> - struct ethtool_wolinfo *wolinfo)
> + struct ethtool_wolinfo *wolinfo)
> {
> struct bfin_mac_local *lp = netdev_priv(dev);
> @@ -523,7 +534,7 @@ static void bfin_mac_ethtool_getwol(struct
> net_device *dev, }
>
> static int bfin_mac_ethtool_setwol(struct net_device *dev,
> - struct ethtool_wolinfo *wolinfo)
> + struct ethtool_wolinfo *wolinfo)
> { struct bfin_mac_local *lp = netdev_priv(dev); int rc; @@ -599,10
> +610,20 @@ void setup_system_regs(struct net_device *dev)
> bfin_write_DMA1_Y_MODIFY(0); }
> +/* Grab the MAC address in the MAC */ static void get_mac_addr(u8
> +*mac_addr) {
> + __le32 addr_hi = cpu_to_le32(bfin_read_EMAC_ADDRLO());
> + __le16 addr_low = cpu_to_le16((u16)bfin_read_EMAC_ADDRHI());
> +
> + memcpy(mac_addr, &addr_hi, 4);
> + memcpy(mac_addr + 4, &addr_low, 2);
> +}
> +
> static void setup_mac_addr(u8 *mac_addr) {
> - u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]);
> - u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]);
> + u32 addr_low = le32_to_cpu(*(__le32 *)&mac_addr[0]);
> + u16 addr_hi = le16_to_cpu(*(__le16 *)&mac_addr[4]);
>
> /* this depends on a little-endian machine */
> bfin_write_EMAC_ADDRLO(addr_low);
> @@ -612,6 +633,7 @@ static void setup_mac_addr(u8 *mac_addr) static
> int bfin_mac_set_mac_address(struct net_device *dev, void *p) {
> struct sockaddr *addr = p; + if (netif_running(dev)) return -EBUSY;
> memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); @@ -623,7
> +645,7 @@ static int bfin_mac_set_mac_address(struct net_device *dev,
> void *p) #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) ==
> HWTSTAMP_FILTER_NONE)
>
> static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev,
> - struct ifreq *ifr, int cmd)
> + struct ifreq *ifr, int cmd)
> {
> struct hwtstamp_config config;
> struct bfin_mac_local *lp = netdev_priv(netdev); @@ -633,15
> +655,15 @@ static int bfin_mac_hwtstamp_ioctl(struct net_device
> *netdev,
> if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
> return -EFAULT;
> - pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
> - __func__, config.flags, config.tx_type,
> config.rx_filter);
> + netdev_dbg("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
> + __func__, config.flags, config.tx_type,
> config.rx_filter);
>
> /* reserved for future extensions */
> if (config.flags)
> return -EINVAL;
>
> if ((config.tx_type != HWTSTAMP_TX_OFF) &&
> - (config.tx_type != HWTSTAMP_TX_ON))
> + (config.tx_type != HWTSTAMP_TX_ON))
> return -ERANGE;
>
> ptpctl = bfin_read_EMAC_PTP_CTL();
> @@ -658,7 +680,8 @@ static int bfin_mac_hwtstamp_ioctl(struct
> net_device *netdev,
> case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
> case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
> /*
> - * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL)
> + * Clear the five comparison mask bits + * (bits[12:8] in
> EMAC_PTP_CTL)
> * to enable all the field matches.
> */
> ptpctl &= ~0x1F00;
> @@ -694,8 +717,8 @@ static int bfin_mac_hwtstamp_ioctl(struct
> net_device *netdev,
> ptpctl &= ~0x1F00;
> bfin_write_EMAC_PTP_CTL(ptpctl);
> /*
> - * Keep the default values of the EMAC_PTP_FOFF register,
> except set
> - * the PTPCOF field to 0x2A.
> + * Keep the default values of the EMAC_PTP_FOFF register,
> + * except set the PTPCOF field to 0x2A.
> */
> ptpfoff = 0x2A24170C;
> bfin_write_EMAC_PTP_FOFF(ptpfoff);
> @@ -720,20 +743,20 @@ static int bfin_mac_hwtstamp_ioctl(struct
> net_device *netdev,
> case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
> case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
> /*
> - * Clear bits 8 and 12 of the EMAC_PTP_CTL register to
> enable only the
> - * EFTM and PTPCM field comparison.
> + * Clear bits 8 and 12 of the EMAC_PTP_CTL register to
> enable
> + * only the EFTM and PTPCM field comparison.
> */
> ptpctl &= ~0x1100;
> bfin_write_EMAC_PTP_CTL(ptpctl);
> /*
> - * Keep the default values of all the fields of the EMAC_PTP_FOFF -
> * register, except set the PTPCOF field to 0x0E. + * Keep the default
> values of all the fields of the + * EMAC_PTP_FOFF register, except set
> the PTPCOF field to 0x0E.
> */
> ptpfoff = 0x0E24170C;
> bfin_write_EMAC_PTP_FOFF(ptpfoff);
> /*
> - * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which
> - * corresponds to PTP messages on the MAC layer. + * Program bits
> [15:0] of the EMAC_PTP_FV1 register to 0x88F7, + * which corresponds
> to PTP messages on the MAC layer.
> */
> ptpfv1 = 0x110488F7;
> bfin_write_EMAC_PTP_FV1(ptpfv1);
> @@ -791,13 +814,17 @@ static int bfin_mac_hwtstamp_ioctl(struct
> net_device *netdev,
> -EFAULT : 0;
> }
> -static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts,
> struct timecompare *cmp)
> +static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts,
> + struct timecompare *cmp)
> {
> ktime_t sys = ktime_get_real();
>
> pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d,
> cmp:%lld, %lld\n",
> - __func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts-
>> tv.nsec, sys.tv.sec,
> - sys.tv.nsec, cmp->offset, cmp->skew);
> + __func__, s,
> + hw->tv.sec, hw->tv.nsec,
> + ts->tv.sec, ts->tv.nsec,
> + sys.tv.sec, sys.tv.nsec,
> + cmp->offset, cmp->skew);
> }
>
> static void bfin_tx_hwtstamp(struct net_device *netdev, struct
> sk_buff
> *skb) @@ -814,16 +841,17 @@ static void bfin_tx_hwtstamp(struct
> net_device *netdev, struct sk_buff *skb)
> shtx->in_progress = 1;
>
> /*
> - * The timestamping is done at the EMAC module's MII/RMII interface
> - * when the module sees the Start of Frame of an event message
> packet. This - * interface is the closest possible place to the
> physical Ethernet transmission + * The timestamping is done at the
> EMAC module's MII/RMII + * interface when the module sees the Start of
> Frame of an + * event message packet. This interface is the closest
> + * possible place to the physical Ethernet transmission
> * medium, providing the best timing accuracy.
> */
> - while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (-- timeout_cnt))
> + while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && +
> (--timeout_cnt))
> udelay(1);
> if (timeout_cnt == 0)
> - printk(KERN_ERR DRV_NAME
> - ": fails to timestamp the TX packet\n");
> + netdev_err(dev, "failed to timestamp the TX
> packet\n");
> else {
> struct skb_shared_hwtstamps shhwtstamps;
> u64 ns;
> @@ -832,15 +860,15 @@ static void bfin_tx_hwtstamp(struct net_device
> *netdev, struct sk_buff *skb)
> regval = bfin_read_EMAC_PTP_TXSNAPLO();
> regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32;
> memset(&shhwtstamps, 0, sizeof(shhwtstamps));
> - ns = timecounter_cyc2time(&lp->clock,
> - regval);
> + ns = timecounter_cyc2time(&lp->clock, regval);
> timecompare_update(&lp->compare, ns);
> shhwtstamps.hwtstamp = ns_to_ktime(ns);
> shhwtstamps.syststamp =
> timecompare_transform(&lp->compare, ns);
> skb_tstamp_tx(skb, &shhwtstamps);
> - bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp,
> &shhwtstamps.syststamp, &lp->compare);
> + bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp,
> + &shhwtstamps.syststamp, &lp->compare);
> }
> }
> }
> @@ -869,7 +897,8 @@ static void bfin_rx_hwtstamp(struct net_device
> *netdev, struct sk_buff *skb)
> shhwtstamps->hwtstamp = ns_to_ktime(ns);
> shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns);
> - bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps-
>> syststamp, &lp->compare);
> + bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp,
> + &shhwtstamps->syststamp, &lp->compare);
> }
>
> /*
> @@ -879,8 +908,8 @@ static cycle_t bfin_read_clock(const struct
> cyclecounter *tc) {
> u64 stamp;
> - stamp = bfin_read_EMAC_PTP_TIMELO();
> - stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL;
> + stamp = bfin_read_EMAC_PTP_TIMELO();
> + stamp |= ((u64)bfin_read_EMAC_PTP_TIMEHI()) << 32;
>
> return stamp;
> }
> @@ -961,7 +990,7 @@ static void tx_reclaim_skb(struct bfin_mac_local
> *lp)
> }
>
> if (current_tx_ptr->next != tx_list_head &&
> - netif_queue_stopped(lp->ndev))
> + netif_queue_stopped(lp->ndev))
> netif_wake_queue(lp->ndev);
>
> if (tx_list_head != current_tx_ptr) { @@ -974,7 +1003,7 @@ static
> void tx_reclaim_skb(struct bfin_mac_local
> *lp)
> jiffies + TX_RECLAIM_JIFFIES;
>
> mod_timer(&lp->tx_reclaim_timer,
> - lp->tx_reclaim_timer.expires);
> + lp->tx_reclaim_timer.expires);
> }
>
> return;
> @@ -985,8 +1014,7 @@ static void tx_reclaim_skb_timeout(unsigned long
> lp)
> tx_reclaim_skb((struct bfin_mac_local *)lp); }
> -static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
> - struct net_device *dev)
> +static int bfin_mac_hard_start_xmit(struct sk_buff *skb, struct
> +net_device *dev)
> {
> struct bfin_mac_local *lp = netdev_priv(dev);
> u16 *data;
> @@ -1000,10 +1028,11 @@ static int bfin_mac_hard_start_xmit(struct
> sk_buff *skb,
> data = (u16 *)(skb->data) - 1;
> *data = (u16)(skb->len);
> /*
> - * When transmitting an Ethernet packet, the PTP_TSYNC module
> requires - * a DMA_Length_Word field associated with the packet. The
> lower 12 bits - * of this field are the length of the packet payload
> in bytes and the higher - * 4 bits are the timestamping enable field.
> + * When transmitting an Ethernet packet, the PTP_TSYNC module + *
> requires a DMA_Length_Word field associated with the packet. + * The
> lower 12 bits of this field are the length of the packet + * payload
> in bytes and the higher 4 bits are the timestamping + * enable field.
> */
> if (shtx->hardware)
> *data |= 0x1000;
> @@ -1011,7 +1040,7 @@ static int bfin_mac_hard_start_xmit(struct
> sk_buff *skb,
> current_tx_ptr->desc_a.start_addr = (u32)data;
> /* this is important! */
> blackfin_dcache_flush_range((u32)data,
> - (u32)((u8 *)data + skb->len + 4));
> + (u32)((u8 *)data + skb->len + 4));
> } else {
> *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len);
> /* enable timestamping for the sent packet */ @@ -1063,7
> +1092,8 @@ out:
>
> #define IP_HEADER_OFF 0
> #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \
> - RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE)
> + RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | \
> + RX_LATE | RX_RANGE)
>
> static void bfin_mac_rx(struct net_device *dev) { @@ -1079,8 +1109,7
> @@ static void bfin_mac_rx(struct net_device *dev) * we which case we
> simply drop the packet */ if (current_rx_ptr->status.status_word &
> RX_ERROR_MASK) {
> - printk(KERN_NOTICE DRV_NAME
> - ": rx: receive error - packet dropped\n");
> + netdev_notice(dev, "rx: receive error - packet dropped\n");
> dev->stats.rx_dropped++; goto out; } @@ -1088,20 +1117,12 @@
> static void bfin_mac_rx(struct net_device *dev) /* allocate a new skb
> for next time receive */ skb = current_rx_ptr->skb;
> - new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
> + new_skb = bfin_alloc_skb();
> if (!new_skb) {
> - printk(KERN_NOTICE DRV_NAME
> - ": rx: low on mem - packet dropped\n");
> + netdev_notice(dev, "rx: low on mem - packet dropped\n");
> dev->stats.rx_dropped++;
> goto out;
> }
> - /* reserve 2 bytes for RXDWA padding */ - skb_reserve(new_skb,
> NET_IP_ALIGN); - /* Invidate the data cache of skb->data range when it
> is write back - * cache. It will prevent overwritting the new data from
> DMA - */ - blackfin_dcache_invalidate_range((unsigned
> long)new_skb->head, - (unsigned long)new_skb->end);
>
> current_rx_ptr->skb = new_skb;
> current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data
> - 2; @@ -1116,25 +1137,28 @@ static void bfin_mac_rx(struct net_device
> *dev)
> bfin_rx_hwtstamp(dev, skb);
>
> #if defined(BFIN_MAC_CSUM_OFFLOAD)
> - /* Checksum offloading only works for IPv4 packets with the standard
> IP header - * length of 20 bytes, because the blackfin MAC checksum
> calculation is - * based on that assumption. We must NOT use the
> calculated checksum if our - * IP version or header break that
> assumption. + /* Checksum offloading only works for IPv4 packets with
> the standard + * IP header length of 20 bytes, because the blackfin MAC
> checksum + * calculation is based on that assumption. We must NOT use
> the + * calculated checksum if our IP version or header break that + *
> assumption.
> */
> if (skb->data[IP_HEADER_OFF] == 0x45) {
> skb->csum = current_rx_ptr->status.ip_payload_csum;
> /*
> - * Deduce Ethernet FCS from hardware generated IP payload checksum.
> - * IP checksum is based on 16-bit one's complement algorithm. - *
> To deduce a value from checksum is equal to add its inversion. - * If
> the IP payload len is odd, the inversed FCS should also - * begin from
> odd address and leave first byte zero. + * Deduce Ethernet FCS from
> hardware generated IP payload + * checksum. IP checksum is based on
> 16-bit one's complement + * algorithm. To deduce a value from
> checksum is equal to + * add its inversion. If the IP payload len is
> odd, the + * inversed FCS should also begin from odd address and leave
> + * first byte zero.
>> */ if (skb->len % 2) { fcs[0] = 0; for (i = 0; i <
>> ETH_FCS_LEN; i++) fcs[i + 1] = ~skb->data[skb->len + i];
>> - skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb- csum);
> + skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1,
> + skb->csum);
> } else { for (i = 0; i < ETH_FCS_LEN; i++) fcs[i] =
> ~skb->data[skb->len + i]; @@ -1209,7 +1233,7 @@ static int
> bfin_mac_enable(void) int ret; u32 opmode;
> - pr_debug("%s: %s\n", DRV_NAME, __func__);
> + pr_debug("%s\n", __func__);
>
> /* Set RX DMA */
> bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a));
> @@ -1251,7 +1275,7 @@ static void bfin_mac_timeout(struct net_device
> *dev) {
> struct bfin_mac_local *lp = netdev_priv(dev);
> - pr_debug("%s: %s\n", dev->name, __func__);
> + netdev_dbg(dev, "%s\n", __func__);
>
> bfin_mac_disable();
> @@ -1318,7 +1342,7 @@ static void bfin_mac_set_multicast_list(struct
> net_device *dev)
> u32 sysctl;
>
> if (dev->flags & IFF_PROMISC) {
> - printk(KERN_INFO "%s: set to promisc mode\n", dev->name);
> + netdev_info(dev, "set to promisc mode\n");
> sysctl = bfin_read_EMAC_OPMODE();
> sysctl |= PR;
> bfin_write_EMAC_OPMODE(sysctl);
> @@ -1372,7 +1396,7 @@ static int bfin_mac_open(struct net_device *dev)
> {
> struct bfin_mac_local *lp = netdev_priv(dev);
> int ret;
> - pr_debug("%s: %s\n", dev->name, __func__);
> + netdev_dbg(dev, "%s\n", __func__);
>
> /* * Check that the address is valid. If its not, refuse @@ -
> 1380,7 +1404,7 @@ static int bfin_mac_open(struct net_device *dev) *
> address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */ if
> (!is_valid_ether_addr(dev->dev_addr)) {
> - printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n");
> + netdev_warn(dev, "no valid ethernet hw addr\n");
> return -EINVAL;
> }
> @@ -1398,7 +1422,7 @@ static int bfin_mac_open(struct net_device *dev)
> ret = bfin_mac_enable();
> if (ret)
> return ret;
> - pr_debug("hardware init finished\n");
> + netdev_dbg(dev, "hardware init finished\n");
>
> netif_start_queue(dev);
> netif_carrier_on(dev);
> @@ -1414,7 +1438,7 @@ static int bfin_mac_open(struct net_device *dev)
> static int bfin_mac_close(struct net_device *dev) {
> struct bfin_mac_local *lp = netdev_priv(dev);
> - pr_debug("%s: %s\n", dev->name, __func__);
> + netdev_dbg(dev, "%s\n", __func__);
>
> netif_stop_queue(dev);
> netif_carrier_off(dev);
> @@ -1464,9 +1488,7 @@ static int __devinit bfin_mac_probe(struct
> platform_device *pdev)
> lp = netdev_priv(ndev);
> lp->ndev = ndev;
> - /* Grab the MAC address in the MAC */ - *(__le32 *)
> (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
> - *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16)
> bfin_read_EMAC_ADDRHI()); + get_mac_addr(ndev->dev_addr);
>
> /* probe mac */
> /*todo: how to proble? which is revision_register */ @@ -1526,8
> +1548,8 @@ static int __devinit bfin_mac_probe(struct platform_device
> *pdev)
>
> /* now, enable interrupts */
> /* register irq handler */
> - rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt,
> - IRQF_DISABLED, "EMAC_RX", ndev);
> + rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, IRQF_DISABLED,
> + "EMAC_RX", ndev);
> if (rc) {
> dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n");
> rc = -EBUSY;
> @@ -1647,7 +1669,7 @@ static int __devinit bfin_mii_bus_probe(struct
> platform_device *pdev)
> miibus->parent = &pdev->dev;
> miibus->name = "bfin_mii_bus";
> snprintf(miibus->id, MII_BUS_ID_SIZE, "0");
> - miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
> + miibus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
> if (miibus->irq == NULL) goto out_err_alloc; for (i = 0; i <
> PHY_MAX_ADDR; ++i) @@ -1674,6 +1696,7 @@ out_err_alloc: static int
> __devexit bfin_mii_bus_remove(struct platform_device *pdev) { struct
> mii_bus *miibus = platform_get_drvdata(pdev); +
> platform_set_drvdata(pdev, NULL); mdiobus_unregister(miibus);
> kfree(miibus->irq);
> @@ -1698,17 +1721,15 @@ static struct platform_driver bfin_mac_driver
> = {
> .suspend = bfin_mac_suspend,
> .driver = {
> .name = DRV_NAME,
> - .owner = THIS_MODULE,
> + .owner = THIS_MODULE,
> },
> };
>
> static int __init bfin_mac_init(void) {
> - int ret;
> - ret = platform_driver_register(&bfin_mii_bus_driver);
> - if (!ret)
> - return platform_driver_register(&bfin_mac_driver);
> - return -ENODEV;
> + if (platform_driver_register(&bfin_mii_bus_driver))
> + return -ENODEV;
> + return platform_driver_register(&bfin_mac_driver);
> }
>
> module_init(bfin_mac_init);
> @@ -1720,4 +1741,3 @@ static void __exit bfin_mac_cleanup(void) }
>
> module_exit(bfin_mac_cleanup);
> -
>

Greetings,
Michael

Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen
Sitz der Gesellschaft Muenchen, Registergericht Muenchen HRB 4036 Geschaeftsfuehrer Thomas Wessel, William A. Martin, Margaret Seif


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