diff options
Diffstat (limited to 'drivers/net/fec.c')
| -rw-r--r-- | drivers/net/fec.c | 901 |
1 files changed, 377 insertions, 524 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 682e7f0b558..0f19b743749 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -86,8 +86,7 @@ static unsigned char fec_mac_default[] = { #endif #endif /* CONFIG_M5272 */ -/* Forward declarations of some structures to support different PHYs -*/ +/* Forward declarations of some structures to support different PHYs */ typedef struct { uint mii_data; @@ -123,8 +122,7 @@ typedef struct { #error "FEC: descriptor ring size constants too large" #endif -/* Interrupt events/masks. -*/ +/* Interrupt events/masks. */ #define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */ #define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */ #define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */ @@ -165,7 +163,7 @@ typedef struct { */ struct fec_enet_private { /* Hardware registers of the FEC device */ - volatile fec_t *hwp; + void __iomem *hwp; struct net_device *netdev; @@ -174,16 +172,20 @@ struct fec_enet_private { /* The saved address of a sent-in-place packet/buffer, for skfree(). */ unsigned char *tx_bounce[TX_RING_SIZE]; struct sk_buff* tx_skbuff[TX_RING_SIZE]; + struct sk_buff* rx_skbuff[RX_RING_SIZE]; ushort skb_cur; ushort skb_dirty; - /* CPM dual port RAM relative addresses. - */ + /* CPM dual port RAM relative addresses */ dma_addr_t bd_dma; - cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */ - cbd_t *tx_bd_base; - cbd_t *cur_rx, *cur_tx; /* The next free ring entry */ - cbd_t *dirty_tx; /* The ring entries to be free()ed. */ + /* Address of Rx and Tx buffers */ + struct bufdesc *rx_bd_base; + struct bufdesc *tx_bd_base; + /* The next free ring entry */ + struct bufdesc *cur_rx, *cur_tx; + /* The ring entries to be free()ed */ + struct bufdesc *dirty_tx; + uint tx_full; /* hold while accessing the HW like ringbuffer for tx/rx but not MAC */ spinlock_t hw_lock; @@ -209,17 +211,13 @@ struct fec_enet_private { int full_duplex; }; -static int fec_enet_open(struct net_device *dev); -static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev); static void fec_enet_mii(struct net_device *dev); static irqreturn_t fec_enet_interrupt(int irq, void * dev_id); static void fec_enet_tx(struct net_device *dev); static void fec_enet_rx(struct net_device *dev); static int fec_enet_close(struct net_device *dev); -static void set_multicast_list(struct net_device *dev); static void fec_restart(struct net_device *dev, int duplex); static void fec_stop(struct net_device *dev); -static void fec_set_mac_address(struct net_device *dev); /* MII processing. We keep this as simple as possible. Requests are @@ -241,19 +239,16 @@ static mii_list_t *mii_tail; static int mii_queue(struct net_device *dev, int request, void (*func)(uint, struct net_device *)); -/* Make MII read/write commands for the FEC. -*/ +/* Make MII read/write commands for the FEC */ #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | \ (VAL & 0xffff)) #define mk_mii_end 0 -/* Transmitter timeout. -*/ -#define TX_TIMEOUT (2*HZ) +/* Transmitter timeout */ +#define TX_TIMEOUT (2 * HZ) -/* Register definitions for the PHY. -*/ +/* Register definitions for the PHY */ #define MII_REG_CR 0 /* Control Register */ #define MII_REG_SR 1 /* Status Register */ @@ -288,18 +283,14 @@ static int mii_queue(struct net_device *dev, int request, static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) { - struct fec_enet_private *fep; - volatile fec_t *fecp; - volatile cbd_t *bdp; + struct fec_enet_private *fep = netdev_priv(dev); + struct bufdesc *bdp; unsigned short status; unsigned long flags; - fep = netdev_priv(dev); - fecp = (volatile fec_t*)dev->base_addr; - if (!fep->link) { /* Link is down or autonegotiation is in progress. */ - return 1; + return NETDEV_TX_BUSY; } spin_lock_irqsave(&fep->hw_lock, flags); @@ -307,30 +298,27 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) bdp = fep->cur_tx; status = bdp->cbd_sc; -#ifndef final_version + if (status & BD_ENET_TX_READY) { /* Ooops. All transmit buffers are full. Bail out. * This should not happen, since dev->tbusy should be set. */ printk("%s: tx queue full!.\n", dev->name); spin_unlock_irqrestore(&fep->hw_lock, flags); - return 1; + return NETDEV_TX_BUSY; } -#endif - /* Clear all of the status flags. - */ + /* Clear all of the status flags */ status &= ~BD_ENET_TX_STATS; - /* Set buffer length and buffer pointer. - */ + /* Set buffer length and buffer pointer */ bdp->cbd_bufaddr = __pa(skb->data); bdp->cbd_datlen = skb->len; /* - * On some FEC implementations data must be aligned on - * 4-byte boundaries. Use bounce buffers to copy data - * and get it aligned. Ugh. + * On some FEC implementations data must be aligned on + * 4-byte boundaries. Use bounce buffers to copy data + * and get it aligned. Ugh. */ if (bdp->cbd_bufaddr & FEC_ALIGNMENT) { unsigned int index; @@ -339,8 +327,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) bdp->cbd_bufaddr = __pa(fep->tx_bounce[index]); } - /* Save skb pointer. - */ + /* Save skb pointer */ fep->tx_skbuff[fep->skb_cur] = skb; dev->stats.tx_bytes += skb->len; @@ -349,13 +336,12 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) /* Push the data cache so the CPM does not get stale memory * data. */ - dma_sync_single(NULL, bdp->cbd_bufaddr, - bdp->cbd_datlen, DMA_TO_DEVICE); + bdp->cbd_bufaddr = dma_map_single(&dev->dev, skb->data, + FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE); /* Send it on its way. Tell FEC it's ready, interrupt when done, * it's the last BD of the frame, and to put the CRC on the end. */ - status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR | BD_ENET_TX_LAST | BD_ENET_TX_TC); bdp->cbd_sc = status; @@ -363,22 +349,20 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) dev->trans_start = jiffies; /* Trigger transmission start */ - fecp->fec_x_des_active = 0; + writel(0, fep->hwp + FEC_X_DES_ACTIVE); - /* If this was the last BD in the ring, start at the beginning again. - */ - if (status & BD_ENET_TX_WRAP) { + /* If this was the last BD in the ring, start at the beginning again. */ + if (status & BD_ENET_TX_WRAP) bdp = fep->tx_bd_base; - } else { + else bdp++; - } if (bdp == fep->dirty_tx) { fep->tx_full = 1; netif_stop_queue(dev); } - fep->cur_tx = (cbd_t *)bdp; + fep->cur_tx = bdp; spin_unlock_irqrestore(&fep->hw_lock, flags); @@ -390,75 +374,33 @@ fec_timeout(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); - printk("%s: transmit timed out.\n", dev->name); dev->stats.tx_errors++; -#ifndef final_version - { - int i; - cbd_t *bdp; - - printk("Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n", - (unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "", - (unsigned long)fep->dirty_tx, - (unsigned long)fep->cur_rx); - - bdp = fep->tx_bd_base; - printk(" tx: %u buffers\n", TX_RING_SIZE); - for (i = 0 ; i < TX_RING_SIZE; i++) { - printk(" %08x: %04x %04x %08x\n", - (uint) bdp, - bdp->cbd_sc, - bdp->cbd_datlen, - (int) bdp->cbd_bufaddr); - bdp++; - } - bdp = fep->rx_bd_base; - printk(" rx: %lu buffers\n", (unsigned long) RX_RING_SIZE); - for (i = 0 ; i < RX_RING_SIZE; i++) { - printk(" %08x: %04x %04x %08x\n", - (uint) bdp, - bdp->cbd_sc, - bdp->cbd_datlen, - (int) bdp->cbd_bufaddr); - bdp++; - } - } -#endif fec_restart(dev, fep->full_duplex); netif_wake_queue(dev); } -/* The interrupt handler. - * This is called from the MPC core interrupt. - */ static irqreturn_t fec_enet_interrupt(int irq, void * dev_id) { struct net_device *dev = dev_id; - volatile fec_t *fecp; + struct fec_enet_private *fep = netdev_priv(dev); uint int_events; irqreturn_t ret = IRQ_NONE; - fecp = (volatile fec_t*)dev->base_addr; - - /* Get the interrupt events that caused us to be here. - */ do { - int_events = fecp->fec_ievent; - fecp->fec_ievent = int_events; + int_events = readl(fep->hwp + FEC_IEVENT); + writel(int_events, fep->hwp + FEC_IEVENT); - /* Handle receive event in its own function. - */ if (int_events & FEC_ENET_RXF) { ret = IRQ_HANDLED; fec_enet_rx(dev); } /* Transmit OK, or non-fatal error. Update the buffer - descriptors. FEC handles all errors, we just discover - them as part of the transmit process. - */ + * descriptors. FEC handles all errors, we just discover + * them as part of the transmit process. + */ if (int_events & FEC_ENET_TXF) { ret = IRQ_HANDLED; fec_enet_tx(dev); @@ -479,7 +421,7 @@ static void fec_enet_tx(struct net_device *dev) { struct fec_enet_private *fep; - volatile cbd_t *bdp; + struct bufdesc *bdp; unsigned short status; struct sk_buff *skb; @@ -488,7 +430,11 @@ fec_enet_tx(struct net_device *dev) bdp = fep->dirty_tx; while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) { - if (bdp == fep->cur_tx && fep->tx_full == 0) break; + if (bdp == fep->cur_tx && fep->tx_full == 0) + break; + + dma_unmap_single(&dev->dev, bdp->cbd_bufaddr, FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE); + bdp->cbd_bufaddr = 0; skb = fep->tx_skbuff[fep->skb_dirty]; /* Check for errors. */ @@ -510,31 +456,27 @@ fec_enet_tx(struct net_device *dev) dev->stats.tx_packets++; } -#ifndef final_version if (status & BD_ENET_TX_READY) printk("HEY! Enet xmit interrupt and TX_READY.\n"); -#endif + /* Deferred means some collisions occurred during transmit, * but we eventually sent the packet OK. */ if (status & BD_ENET_TX_DEF) dev->stats.collisions++; - /* Free the sk buffer associated with this last transmit. - */ + /* Free the sk buffer associated with this last transmit */ dev_kfree_skb_any(skb); fep->tx_skbuff[fep->skb_dirty] = NULL; fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK; - /* Update pointer to next buffer descriptor to be transmitted. - */ + /* Update pointer to next buffer descriptor to be transmitted */ if (status & BD_ENET_TX_WRAP) bdp = fep->tx_bd_base; else bdp++; - /* Since we have freed up a buffer, the ring is no longer - * full. + /* Since we have freed up a buffer, the ring is no longer full */ if (fep->tx_full) { fep->tx_full = 0; @@ -542,7 +484,7 @@ fec_enet_tx(struct net_device *dev) netif_wake_queue(dev); } } - fep->dirty_tx = (cbd_t *)bdp; + fep->dirty_tx = bdp; spin_unlock_irq(&fep->hw_lock); } @@ -555,9 +497,8 @@ fec_enet_tx(struct net_device *dev) static void fec_enet_rx(struct net_device *dev) { - struct fec_enet_private *fep; - volatile fec_t *fecp; - volatile cbd_t *bdp; + struct fec_enet_private *fep = netdev_priv(dev); + struct bufdesc *bdp; unsigned short status; struct sk_buff *skb; ushort pkt_len; @@ -567,9 +508,6 @@ fec_enet_rx(struct net_device *dev) flush_cache_all(); #endif - fep = netdev_priv(dev); - fecp = (volatile fec_t*)dev->base_addr; - spin_lock_irq(&fep->hw_lock); /* First, grab all of the stats for the incoming packet. @@ -577,143 +515,121 @@ fec_enet_rx(struct net_device *dev) */ bdp = fep->cur_rx; -while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) { + while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) { -#ifndef final_version - /* Since we have allocated space to hold a complete frame, - * the last indicator should be set. - */ - if ((status & BD_ENET_RX_LAST) == 0) - printk("FEC ENET: rcv is not +last\n"); -#endif + /* Since we have allocated space to hold a complete frame, + * the last indicator should be set. + */ + if ((status & BD_ENET_RX_LAST) == 0) + printk("FEC ENET: rcv is not +last\n"); - if (!fep->opened) - goto rx_processing_done; + if (!fep->opened) + goto rx_processing_done; - /* Check for errors. */ - if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | + /* Check for errors. */ + if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { - dev->stats.rx_errors++; - if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) { - /* Frame too long or too short. */ - dev->stats.rx_length_errors++; + dev->stats.rx_errors++; + if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) { + /* Frame too long or too short. */ + dev->stats.rx_length_errors++; + } + if (status & BD_ENET_RX_NO) /* Frame alignment */ + dev->stats.rx_frame_errors++; + if (status & BD_ENET_RX_CR) /* CRC Error */ + dev->stats.rx_crc_errors++; + if (status & BD_ENET_RX_OV) /* FIFO overrun */ + dev->stats.rx_fifo_errors++; } - if (status & BD_ENET_RX_NO) /* Frame alignment */ + + /* Report late collisions as a frame error. + * On this error, the BD is closed, but we don't know what we + * have in the buffer. So, just drop this frame on the floor. + */ + if (status & BD_ENET_RX_CL) { + dev->stats.rx_errors++; dev->stats.rx_frame_errors++; - if (status & BD_ENET_RX_CR) /* CRC Error */ - dev->stats.rx_crc_errors++; - if (status & BD_ENET_RX_OV) /* FIFO overrun */ - dev->stats.rx_fifo_errors++; - } + goto rx_processing_done; + } - /* Report late collisions as a frame error. - * On this error, the BD is closed, but we don't know what we - * have in the buffer. So, just drop this frame on the floor. - */ - if (status & BD_ENET_RX_CL) { - dev->stats.rx_errors++; - dev->stats.rx_frame_errors++; - goto rx_processing_done; - } + /* Process the incoming frame. */ + dev->stats.rx_packets++; + pkt_len = bdp->cbd_datlen; + dev->stats.rx_bytes += pkt_len; + data = (__u8*)__va(bdp->cbd_bufaddr); - /* Process the incoming frame. - */ - dev->stats.rx_packets++; - pkt_len = bdp->cbd_datlen; - dev->stats.rx_bytes += pkt_len; - data = (__u8*)__va(bdp->cbd_bufaddr); - - dma_sync_single(NULL, (unsigned long)__pa(data), - pkt_len - 4, DMA_FROM_DEVICE); - - /* This does 16 byte alignment, exactly what we need. - * The packet length includes FCS, but we don't want to - * include that when passing upstream as it messes up - * bridging applications. - */ - skb = dev_alloc_skb(pkt_len-4); + dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen, + DMA_FROM_DEVICE); - if (skb == NULL) { - printk("%s: Memory squeeze, dropping packet.\n", dev->name); - dev->stats.rx_dropped++; - } else { - skb_put(skb,pkt_len-4); /* Make room */ - skb_copy_to_linear_data(skb, data, pkt_len-4); - skb->protocol=eth_type_trans(skb,dev); - netif_rx(skb); - } - rx_processing_done: + /* This does 16 byte alignment, exactly what we need. + * The packet length includes FCS, but we don't want to + * include that when passing upstream as it messes up + * bridging applications. + */ + skb = dev_alloc_skb(pkt_len - 4 + NET_IP_ALIGN); - /* Clear the status flags for this buffer. - */ - status &= ~BD_ENET_RX_STATS; + if (unlikely(!skb)) { + printk("%s: Memory squeeze, dropping packet.\n", + dev->name); + dev->stats.rx_dropped++; + } else { + skb_reserve(skb, NET_IP_ALIGN); + skb_put(skb, pkt_len - 4); /* Make room */ + skb_copy_to_linear_data(skb, data, pkt_len - 4); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + } - /* Mark the buffer empty. - */ - status |= BD_ENET_RX_EMPTY; - bdp->cbd_sc = status; + bdp->cbd_bufaddr = dma_map_single(NULL, data, bdp->cbd_datlen, + DMA_FROM_DEVICE); +rx_processing_done: + /* Clear the status flags for this buffer */ + status &= ~BD_ENET_RX_STATS; - /* Update BD pointer to next entry. - */ - if (status & BD_ENET_RX_WRAP) - bdp = fep->rx_bd_base; - else - bdp++; + /* Mark the buffer empty */ + status |= BD_ENET_RX_EMPTY; + bdp->cbd_sc = status; -#if 1 - /* Doing this here will keep the FEC running while we process - * incoming frames. On a heavily loaded network, we should be - * able to keep up at the expense of system resources. - */ - fecp->fec_r_des_active = 0; -#endif - } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */ - fep->cur_rx = (cbd_t *)bdp; - -#if 0 - /* Doing this here will allow us to process all frames in the - * ring before the FEC is allowed to put more there. On a heavily - * loaded network, some frames may be lost. Unfortunately, this - * increases the interrupt overhead since we can potentially work - * our way back to the interrupt return only to come right back - * here. - */ - fecp->fec_r_des_active = 0; -#endif + /* Update BD pointer to next entry */ + if (status & BD_ENET_RX_WRAP) + bdp = fep->rx_bd_base; + else + bdp++; + /* Doing this here will keep the FEC running while we process + * incoming frames. On a heavily loaded network, we should be + * able to keep up at the expense of system resources. + */ + writel(0, fep->hwp + FEC_R_DES_ACTIVE); + } + fep->cur_rx = bdp; spin_unlock_irq(&fep->hw_lock); } - /* called from interrupt context */ static void fec_enet_mii(struct net_device *dev) { struct fec_enet_private *fep; - volatile fec_t *ep; mii_list_t *mip; - uint mii_reg; fep = netdev_priv(dev); spin_lock_irq(&fep->mii_lock); - ep = fep->hwp; - mii_reg = ep->fec_mii_data; - if ((mip = mii_head) == NULL) { printk("MII and no head!\n"); goto unlock; } if (mip->mii_func != NULL) - (*(mip->mii_func))(mii_reg, dev); + (*(mip->mii_func))(readl(fep->hwp + FEC_MII_DATA), dev); mii_head = mip->mii_next; mip->mii_next = mii_free; mii_free = mip; if ((mip = mii_head) != NULL) - ep->fec_mii_data = mip->mii_regval; + writel(mip->mii_regval, fep->hwp + FEC_MII_DATA); unlock: spin_unlock_irq(&fep->mii_lock); @@ -727,8 +643,7 @@ mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_devi mii_list_t *mip; int retval; - /* Add PHY address to register command. - */ + /* Add PHY address to register command */ fep = netdev_priv(dev); spin_lock_irqsave(&fep->mii_lock, flags); @@ -745,7 +660,7 @@ mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_devi mii_tail = mip; } else { mii_head = mii_tail = mip; - fep->hwp->fec_mii_data = regval; + writel(regval, fep->hwp + FEC_MII_DATA); } } else { retval = 1; @@ -1246,11 +1161,8 @@ static void __inline__ fec_phy_ack_intr(void) static void __inline__ fec_get_mac(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); - volatile fec_t *fecp; unsigned char *iap, tmpaddr[ETH_ALEN]; - fecp = fep->hwp; - if (FEC_FLASHMAC) { /* * Get MAC address from FLASH. @@ -1264,8 +1176,8 @@ static void __inline__ fec_get_mac(struct net_device *dev) (iap[3] == 0xff) && (iap[4] == 0xff) && (iap[5] == 0xff)) iap = fec_mac_default; } else { - *((unsigned long *) &tmpaddr[0]) = fecp->fec_addr_low; - *((unsigned short *) &tmpaddr[4]) = (fecp->fec_addr_high >> 16); + *((unsigned long *) &tmpaddr[0]) = readl(fep->hwp + FEC_ADDR_LOW); + *((unsigned short *) &tmpaddr[4]) = (readl(fep->hwp + FEC_ADDR_HIGH) >> 16); iap = &tmpaddr[0]; } @@ -1375,11 +1287,6 @@ static void mii_relink(struct work_struct *work) fec_restart(dev, duplex); } else fec_stop(dev); - -#if 0 - enable_irq(fep->mii_irq); -#endif - } /* mii_queue_relink is called in interrupt context from mii_link_interrupt */ @@ -1388,12 +1295,12 @@ static void mii_queue_relink(uint mii_reg, struct net_device *dev) struct fec_enet_private *fep = netdev_priv(dev); /* - ** We cannot queue phy_task twice in the workqueue. It - ** would cause an endless loop in the workqueue. - ** Fortunately, if the last mii_relink entry has not yet been - ** executed now, it will do the job for the current interrupt, - ** which is just what we want. - */ + * We cannot queue phy_task twice in the workqueue. It + * would cause an endless loop in the workqueue. + * Fortunately, if the last mii_relink entry has not yet been + * executed now, it will do the job for the current interrupt, + * which is just what we want. + */ if (fep->mii_phy_task_queued) return; @@ -1424,8 +1331,7 @@ phy_cmd_t const phy_cmd_config[] = { { mk_mii_end, } }; -/* Read remainder of PHY ID. -*/ +/* Read remainder of PHY ID. */ static void mii_discover_phy3(uint mii_reg, struct net_device *dev) { @@ -1457,17 +1363,14 @@ static void mii_discover_phy(uint mii_reg, struct net_device *dev) { struct fec_enet_private *fep; - volatile fec_t *fecp; uint phytype; fep = netdev_priv(dev); - fecp = fep->hwp; if (fep->phy_addr < 32) { if ((phytype = (mii_reg & 0xffff)) != 0xffff && phytype != 0) { - /* Got first part of ID, now get remainder. - */ + /* Got first part of ID, now get remainder */ fep->phy_id = phytype << 16; mii_queue(dev, mk_mii_read(MII_REG_PHYIR2), mii_discover_phy3); @@ -1479,15 +1382,15 @@ mii_discover_phy(uint mii_reg, struct net_device *dev) } else { printk("FEC: No PHY device found.\n"); /* Disable external MII interface */ - fecp->fec_mii_speed = fep->phy_speed = 0; + writel(0, fep->hwp + FEC_MII_SPEED); + fep->phy_speed = 0; #ifdef HAVE_mii_link_interrupt fec_disable_phy_intr(); #endif } } -/* This interrupt occurs when the PHY detects a link change. -*/ +/* This interrupt occurs when the PHY detects a link change */ #ifdef HAVE_mii_link_interrupt static irqreturn_t mii_link_interrupt(int irq, void * dev_id) @@ -1497,10 +1400,6 @@ mii_link_interrupt(int irq, void * dev_id) fec_phy_ack_intr(); -#if 0 - disable_irq(fep->mii_irq); /* disable now, enable later */ -#endif - mii_do_cmd(dev, fep->phy->ack_int); mii_do_cmd(dev, phy_cmd_relink); /* restart and display status */ @@ -1508,19 +1407,91 @@ mii_link_interrupt(int irq, void * dev_id) } #endif +static void fec_enet_free_buffers(struct net_device *dev) +{ + struct fec_enet_private *fep = netdev_priv(dev); + int i; + struct sk_buff *skb; + struct bufdesc *bdp; + + bdp = fep->rx_bd_base; + for (i = 0; i < RX_RING_SIZE; i++) { + skb = fep->rx_skbuff[i]; + + if (bdp->cbd_bufaddr) + dma_unmap_single(&dev->dev, bdp->cbd_bufaddr, + FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); + if (skb) + dev_kfree_skb(skb); + bdp++; + } + + bdp = fep->tx_bd_base; + for (i = 0; i < TX_RING_SIZE; i++) + kfree(fep->tx_bounce[i]); +} + +static int fec_enet_alloc_buffers(struct net_device *dev) +{ + struct fec_enet_private *fep = netdev_priv(dev); + int i; + struct sk_buff *skb; + struct bufdesc *bdp; + + bdp = fep->rx_bd_base; + for (i = 0; i < RX_RING_SIZE; i++) { + skb = dev_alloc_skb(FEC_ENET_RX_FRSIZE); + if (!skb) { + fec_enet_free_buffers(dev); + return -ENOMEM; + } + fep->rx_skbuff[i] = skb; + + bdp->cbd_bufaddr = dma_map_single(&dev->dev, skb->data, + FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); + bdp->cbd_sc = BD_ENET_RX_EMPTY; + bdp++; + } + + /* Set the last buffer to wrap. */ + bdp--; + bdp->cbd_sc |= BD_SC_WRAP; + + bdp = fep->tx_bd_base; + for (i = 0; i < TX_RING_SIZE; i++) { + fep->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL); + + bdp->cbd_sc = 0; + bdp->cbd_bufaddr = 0; + bdp++; + } + + /* Set the last buffer to wrap. */ + bdp--; + bdp->cbd_sc |= BD_SC_WRAP; + + return 0; +} + static int fec_enet_open(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); + int ret; /* I should reset the ring buffers here, but I don't yet know * a simple way to do that. */ - fec_set_mac_address(dev); + + ret = fec_enet_alloc_buffers(dev); + if (ret) + return ret; fep->sequence_done = 0; fep->link = 0; + fec_restart(dev, 1); + if (fep->phy) { mii_do_cmd(dev, fep->phy->ack_int); mii_do_cmd(dev, fep->phy->config); @@ -1537,21 +1508,17 @@ fec_enet_open(struct net_device *dev) schedule(); mii_do_cmd(dev, fep->phy->startup); - - /* Set the initial link state to true. A lot of hardware - * based on this device does not implement a PHY interrupt, - * so we are never notified of link change. - */ - fep->link = 1; - } else { - fep->link = 1; /* lets just try it and see */ - /* no phy, go full duplex, it's most likely a hub chip */ - fec_restart(dev, 1); } + /* Set the initial link state to true. A lot of hardware + * based on this device does not implement a PHY interrupt, + * so we are never notified of link change. + */ + fep->link = 1; + netif_start_queue(dev); fep->opened = 1; - return 0; /* Success */ + return 0; } static int @@ -1559,12 +1526,13 @@ fec_enet_close(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); - /* Don't know what to do yet. - */ + /* Don't know what to do yet. */ fep->opened = 0; netif_stop_queue(dev); fec_stop(dev); + fec_enet_free_buffers(dev); + return 0; } @@ -1583,87 +1551,102 @@ fec_enet_close(struct net_device *dev) static void set_multicast_list(struct net_device *dev) { - struct fec_enet_private *fep; - volatile fec_t *ep; + struct fec_enet_private *fep = netdev_priv(dev); struct dev_mc_list *dmi; - unsigned int i, j, bit, data, crc; + unsigned int i, j, bit, data, crc, tmp; unsigned char hash; - fep = netdev_priv(dev); - ep = fep->hwp; + if (dev->flags & IFF_PROMISC) { + tmp = readl(fep->hwp + FEC_R_CNTRL); + tmp |= 0x8; + writel(tmp, fep->hwp + FEC_R_CNTRL); + return; + } - if (dev->flags&IFF_PROMISC) { - ep->fec_r_cntrl |= 0x0008; - } else { + tmp = readl(fep->hwp + FEC_R_CNTRL); + tmp &= ~0x8; + writel(tmp, fep->hwp + FEC_R_CNTRL); + + if (dev->flags & IFF_ALLMULTI) { + /* Catch all multicast addresses, so set the + * filter to all 1's + */ + writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); + writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW); - ep->fec_r_cntrl &= ~0x0008; + return; + } - if (dev->flags & IFF_ALLMULTI) { - /* Catch all multicast addresses, so set the - * filter to all 1's. - */ - ep->fec_grp_hash_table_high = 0xffffffff; - ep->fec_grp_hash_table_low = 0xffffffff; - } else { - /* Clear filter and add the addresses in hash register. - */ - ep->fec_grp_hash_table_high = 0; - ep->fec_grp_hash_table_low = 0; - - dmi = dev->mc_list; - - for (j = 0; j < dev->mc_count; j++, dmi = dmi->next) - { - /* Only support group multicast for now. - */ - if (!(dmi->dmi_addr[0] & 1)) - continue; - - /* calculate crc32 value of mac address - */ - crc = 0xffffffff; - - for (i = 0; i < dmi->dmi_addrlen; i++) - { - data = dmi->dmi_addr[i]; - for (bit = 0; bit < 8; bit++, data >>= 1) - { - crc = (crc >> 1) ^ - (((crc ^ data) & 1) ? CRC32_POLY : 0); - } - } - - /* only upper 6 bits (HASH_BITS) are used - which point to specific bit in he hash registers - */ - hash = (crc >> (32 - HASH_BITS)) & 0x3f; - - if (hash > 31) - ep->fec_grp_hash_table_high |= 1 << (hash - 32); - else - ep->fec_grp_hash_table_low |= 1 << hash; + /* Clear filter and add the addresses in hash register + */ + writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); + writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); + + dmi = dev->mc_list; + + for (j = 0; j < dev->mc_count; j++, dmi = dmi->next) { + /* Only support group multicast for now */ + if (!(dmi->dmi_addr[0] & 1)) + continue; + + /* calculate crc32 value of mac address */ + crc = 0xffffffff; + + for (i = 0; i < dmi->dmi_addrlen; i++) { + data = dmi->dmi_addr[i]; + for (bit = 0; bit < 8; bit++, data >>= 1) { + crc = (crc >> 1) ^ + (((crc ^ data) & 1) ? CRC32_POLY : 0); } } + + /* only upper 6 bits (HASH_BITS) are used + * which point to specific bit in he hash registers + */ + hash = (crc >> (32 - HASH_BITS)) & 0x3f; + + if (hash > 31) { + tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH); + tmp |= 1 << (hash - 32); + writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); + } else { + tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW); + tmp |= 1 << hash; + writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW); + } } } -/* Set a MAC change in hardware. - */ -static void -fec_set_mac_address(struct net_device *dev) +/* Set a MAC change in hardware. */ +static int +fec_set_mac_address(struct net_device *dev, void *p) { - volatile fec_t *fecp; + struct fec_enet_private *fep = netdev_priv(dev); + struct sockaddr *addr = p; - fecp = ((struct fec_enet_private *)netdev_priv(dev))->hwp; + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; - /* Set station address. */ - fecp->fec_addr_low = dev->dev_addr[3] | (dev->dev_addr[2] << 8) | - (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24); - fecp->fec_addr_high = (dev->dev_addr[5] << 16) | - (dev->dev_addr[4] << 24); + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + writel(dev->dev_addr[3] | (dev->dev_addr[2] << 8) | + (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24), + fep->hwp + FEC_ADDR_LOW); + writel((dev->dev_addr[5] << 16) | (dev->dev_addr[4] << 24), + fep + FEC_ADDR_HIGH); + return 0; } +static const struct net_device_ops fec_netdev_ops = { + .ndo_open = fec_enet_open, + .ndo_stop = fec_enet_close, + .ndo_start_xmit = fec_enet_start_xmit, + .ndo_set_multicast_list = set_multicast_list, + .ndo_validate_addr = eth_validate_addr, + .ndo_tx_timeout = fec_timeout, + .ndo_set_mac_address = fec_set_mac_address, +}; + /* * XXX: We need to clean up on failure exits here. * @@ -1672,17 +1655,13 @@ fec_set_mac_address(struct net_device *dev) int __init fec_enet_init(struct net_device *dev, int index) { struct fec_enet_private *fep = netdev_priv(dev); - unsigned long mem_addr; - volatile cbd_t *bdp; - cbd_t *cbd_base; - volatile fec_t *fecp; - int i, j; + struct bufdesc *cbd_base; + int i; - /* Allocate memory for buffer descriptors. - */ - mem_addr = (unsigned long)dma_alloc_coherent(NULL, PAGE_SIZE, - &fep->bd_dma, GFP_KERNEL); - if (mem_addr == 0) { + /* Allocate memory for buffer descriptors. */ + cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma, + GFP_KERNEL); + if (!cbd_base) { printk("FEC: allocate descriptor memory failed?\n"); return -ENOMEM; } @@ -1690,146 +1669,47 @@ int __init fec_enet_init(struct net_device *dev, int index) spin_lock_init(&fep->hw_lock); spin_lock_init(&fep->mii_lock); - /* Create an Ethernet device instance. - */ - fecp = (volatile fec_t *)dev->base_addr; - fep->index = index; - fep->hwp = fecp; + fep->hwp = (void __iomem *)dev->base_addr; fep->netdev = dev; - /* Whack a reset. We should wait for this. - */ - fecp->fec_ecntrl = 1; - udelay(10); - /* Set the Ethernet address */ #ifdef CONFIG_M5272 fec_get_mac(dev); #else { unsigned long l; - l = fecp->fec_addr_low; + l = readl(fep->hwp + FEC_ADDR_LOW); dev->dev_addr[0] = (unsigned char)((l & 0xFF000000) >> 24); dev->dev_addr[1] = (unsigned char)((l & 0x00FF0000) >> 16); dev->dev_addr[2] = (unsigned char)((l & 0x0000FF00) >> 8); dev->dev_addr[3] = (unsigned char)((l & 0x000000FF) >> 0); - l = fecp->fec_addr_high; + l = readl(fep->hwp + FEC_ADDR_HIGH); dev->dev_addr[4] = (unsigned char)((l & 0xFF000000) >> 24); dev->dev_addr[5] = (unsigned char)((l & 0x00FF0000) >> 16); } #endif - cbd_base = (cbd_t *)mem_addr; - - /* Set receive and transmit descriptor base. - */ + /* Set receive and transmit descriptor base. */ fep->rx_bd_base = cbd_base; fep->tx_bd_base = cbd_base + RX_RING_SIZE; - fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; - fep->cur_rx = fep->rx_bd_base; - - fep->skb_cur = fep->skb_dirty = 0; - - /* Initialize the receive buffer descriptors. - */ - bdp = fep->rx_bd_base; - for (i=0; i<FEC_ENET_RX_PAGES; i++) { - - /* Allocate a page. - */ - mem_addr = __get_free_page(GFP_KERNEL); - /* XXX: missing check for allocation failure */ - - /* Initialize the BD for every fragment in the page. - */ - for (j=0; j<FEC_ENET_RX_FRPPG; j++) { - bdp->cbd_sc = BD_ENET_RX_EMPTY; - bdp->cbd_bufaddr = __pa(mem_addr); - mem_addr += FEC_ENET_RX_FRSIZE; - bdp++; - } - } - - /* Set the last buffer to wrap. - */ - bdp--; - bdp->cbd_sc |= BD_SC_WRAP; - - /* ...and the same for transmmit. - */ - bdp = fep->tx_bd_base; - for (i=0, j=FEC_ENET_TX_FRPPG; i<TX_RING_SIZE; i++) { - if (j >= FEC_ENET_TX_FRPPG) { - mem_addr = __get_free_page(GFP_KERNEL); - j = 1; - } else { - mem_addr += FEC_ENET_TX_FRSIZE; - j++; - } - fep->tx_bounce[i] = (unsigned char *) mem_addr; - - /* Initialize the BD for every fragment in the page. - */ - bdp->cbd_sc = 0; - bdp->cbd_bufaddr = 0; - bdp++; - } - - /* Set the last buffer to wrap. - */ - bdp--; - bdp->cbd_sc |= BD_SC_WRAP; - - /* Set receive and transmit descriptor base. - */ - fecp->fec_r_des_start = fep->bd_dma; - fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t) - * RX_RING_SIZE; - #ifdef HAVE_mii_link_interrupt fec_request_mii_intr(dev); #endif - - fecp->fec_grp_hash_table_high = 0; - fecp->fec_grp_hash_table_low = 0; - fecp->fec_r_buff_size = PKT_MAXBLR_SIZE; - fecp->fec_ecntrl = 2; - fecp->fec_r_des_active = 0; -#ifndef CONFIG_M5272 - fecp->fec_hash_table_high = 0; - fecp->fec_hash_table_low = 0; -#endif - - /* The FEC Ethernet specific entries in the device structure. */ - dev->open = fec_enet_open; - dev->hard_start_xmit = fec_enet_start_xmit; - dev->tx_timeout = fec_timeout; + /* The FEC Ethernet specific entries in the device structure */ dev->watchdog_timeo = TX_TIMEOUT; - dev->stop = fec_enet_close; - dev->set_multicast_list = set_multicast_list; + dev->netdev_ops = &fec_netdev_ops; for (i=0; i<NMII-1; i++) mii_cmds[i].mii_next = &mii_cmds[i+1]; mii_free = mii_cmds; - /* setup MII interface */ - fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04; - fecp->fec_x_cntrl = 0x00; - - /* - * Set MII speed to 2.5 MHz - */ + /* Set MII speed to 2.5 MHz */ fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999) / 2500000) / 2) & 0x3F) << 1; - fecp->fec_mii_speed = fep->phy_speed; fec_restart(dev, 0); - /* Clear and enable interrupts */ - fecp->fec_ievent = 0xffc00000; - fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII); - /* Queue up command to detect the PHY and initialize the * remainder of the interface. */ @@ -1847,145 +1727,118 @@ int __init fec_enet_init(struct net_device *dev, int index) static void fec_restart(struct net_device *dev, int duplex) { - struct fec_enet_private *fep; - volatile cbd_t *bdp; - volatile fec_t *fecp; + struct fec_enet_private *fep = netdev_priv(dev); + struct bufdesc *bdp; int i; - fep = netdev_priv(dev); - fecp = fep->hwp; - - /* Whack a reset. We should wait for this. - */ - fecp->fec_ecntrl = 1; + /* Whack a reset. We should wait for this. */ + writel(1, fep->hwp + FEC_ECNTRL); udelay(10); - /* Clear any outstanding interrupt. - */ - fecp->fec_ievent = 0xffc00000; + /* Clear any outstanding interrupt. */ + writel(0xffc00000, fep->hwp + FEC_IEVENT); - /* Set station address. - */ - fec_set_mac_address(dev); + /* Reset all multicast. */ + writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); + writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); +#ifndef CONFIG_M5272 + writel(0, fep->hwp + FEC_HASH_TABLE_HIGH); + writel(0, fep->hwp + FEC_HASH_TABLE_LOW); +#endif - /* Reset all multicast. - */ - fecp->fec_grp_hash_table_high = 0; - fecp->fec_grp_hash_table_low = 0; + /* Set maximum receive buffer size. */ + writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE); - /* Set maximum receive buffer size. - */ - fecp->fec_r_buff_size = PKT_MAXBLR_SIZE; - - /* Set receive and transmit descriptor base. - */ - fecp->fec_r_des_start = fep->bd_dma; - fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t) - * RX_RING_SIZE; + /* Set receive and transmit descriptor base. */ + writel(fep->bd_dma, fep->hwp + FEC_R_DES_START); + writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE, + fep->hwp + FEC_X_DES_START); fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; fep->cur_rx = fep->rx_bd_base; - /* Reset SKB transmit buffers. - */ + /* Reset SKB transmit buffers. */ fep->skb_cur = fep->skb_dirty = 0; - for (i=0; i<=TX_RING_MOD_MASK; i++) { - if (fep->tx_skbuff[i] != NULL) { + for (i = 0; i <= TX_RING_MOD_MASK; i++) { + if (fep->tx_skbuff[i]) { dev_kfree_skb_any(fep->tx_skbuff[i]); fep->tx_skbuff[i] = NULL; } } - /* Initialize the receive buffer descriptors. - */ + /* Initialize the receive buffer descriptors. */ bdp = fep->rx_bd_base; - for (i=0; i<RX_RING_SIZE; i++) { + for (i = 0; i < RX_RING_SIZE; i++) { - /* Initialize the BD for every fragment in the page. - */ + /* Initialize the BD for every fragment in the page. */ bdp->cbd_sc = BD_ENET_RX_EMPTY; bdp++; } - /* Set the last buffer to wrap. - */ + /* Set the last buffer to wrap */ bdp--; bdp->cbd_sc |= BD_SC_WRAP; - /* ...and the same for transmmit. - */ + /* ...and the same for transmit */ bdp = fep->tx_bd_base; - for (i=0; i<TX_RING_SIZE; i++) { + for (i = 0; i < TX_RING_SIZE; i++) { - /* Initialize the BD for every fragment in the page. - */ + /* Initialize the BD for every fragment in the page. */ bdp->cbd_sc = 0; bdp->cbd_bufaddr = 0; bdp++; } - /* Set the last buffer to wrap. - */ + /* Set the last buffer to wrap */ bdp--; bdp->cbd_sc |= BD_SC_WRAP; - /* Enable MII mode. - */ + /* Enable MII mode */ if (duplex) { - fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;/* MII enable */ - fecp->fec_x_cntrl = 0x04; /* FD enable */ + /* MII enable / FD enable */ + writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL); + writel(0x04, fep->hwp + FEC_X_CNTRL); } else { - /* MII enable|No Rcv on Xmit */ - fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x06; - fecp->fec_x_cntrl = 0x00; + /* MII enable / No Rcv on Xmit */ + writel(OPT_FRAME_SIZE | 0x06, fep->hwp + FEC_R_CNTRL); + writel(0x0, fep->hwp + FEC_X_CNTRL); } fep->full_duplex = duplex; - /* Set MII speed. - */ - fecp->fec_mii_speed = fep->phy_speed; + /* Set MII speed */ + writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); - /* And last, enable the transmit and receive processing. - */ - fecp->fec_ecntrl = 2; - fecp->fec_r_des_active = 0; + /* And last, enable the transmit and receive processing */ + writel(2, fep->hwp + FEC_ECNTRL); + writel(0, fep->hwp + FEC_R_DES_ACTIVE); - /* Enable interrupts we wish to service. - */ - fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII); + /* Enable interrupts we wish to service */ + writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII, + fep->hwp + FEC_IMASK); } static void fec_stop(struct net_device *dev) { - volatile fec_t *fecp; - struct fec_enet_private *fep; - - fep = netdev_priv(dev); - fecp = fep->hwp; + struct fec_enet_private *fep = netdev_priv(dev); - /* - ** We cannot expect a graceful transmit stop without link !!! - */ - if (fep->link) - { - fecp->fec_x_cntrl = 0x01; /* Graceful transmit stop */ + /* We cannot expect a graceful transmit stop without link !!! */ + if (fep->link) { + writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */ udelay(10); - if (!(fecp->fec_ievent & FEC_ENET_GRA)) + if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA)) printk("fec_stop : Graceful transmit stop did not complete !\n"); - } + } - /* Whack a reset. We should wait for this. - */ - fecp->fec_ecntrl = 1; + /* Whack a reset. We should wait for this. */ + writel(1, fep->hwp + FEC_ECNTRL); udelay(10); - /* Clear outstanding MII command interrupts. - */ - fecp->fec_ievent = FEC_ENET_MII; + /* Clear outstanding MII command interrupts. */ + writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT); - fecp->fec_imask = FEC_ENET_MII; - fecp->fec_mii_speed = fep->phy_speed; + writel(FEC_ENET_MII, fep->hwp + FEC_IMASK); + writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); } static int __devinit |