From c9df406f3138265193f5e8d7b7fe85dfbbbd3ac4 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Sun, 1 Jun 2008 00:48:39 +0200 Subject: [PATCH] mv643xx_eth: reverse topological sort of functions This patch performs a reverse topological sort of all functions in mv643xx_eth.c, so that we can get rid of all forward declarations, and end up with a more understandable driver due to related functions being grouped together. Signed-off-by: Lennert Buytenhek Acked-by: Dale Farnsworth --- drivers/net/mv643xx_eth.c | 3878 ++++++++++++++++++------------------- 1 file changed, 1866 insertions(+), 2012 deletions(-) diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index b7915cdcc6a5..835b85d30bc6 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -62,6 +62,9 @@ #include #include +static char mv643xx_driver_name[] = "mv643xx_eth"; +static char mv643xx_driver_version[] = "1.0"; + #define MV643XX_CHECKSUM_OFFLOAD_TX #define MV643XX_NAPI #define MV643XX_TX_FAST_REFILL @@ -478,7 +481,21 @@ struct pkt_info { struct sk_buff *return_info; /* User resource return information */ }; -/* Ethernet port specific information */ + +/* global *******************************************************************/ +struct mv643xx_shared_private { + void __iomem *eth_base; + + /* used to protect SMI_REG, which is shared across ports */ + spinlock_t phy_lock; + + u32 win_protect; + + unsigned int t_clk; +}; + + +/* per-port *****************************************************************/ struct mv643xx_mib_counters { u64 good_octets_received; u32 bad_octets_received; @@ -512,17 +529,6 @@ struct mv643xx_mib_counters { u32 late_collision; }; -struct mv643xx_shared_private { - void __iomem *eth_base; - - /* used to protect SMI_REG, which is shared across ports */ - spinlock_t phy_lock; - - u32 win_protect; - - unsigned int t_clk; -}; - struct mv643xx_private { struct mv643xx_shared_private *shared; int port_num; /* User Ethernet port number */ @@ -585,93 +591,135 @@ struct mv643xx_private { struct mii_if_info mii; }; -/* Static function declarations */ -static void eth_port_init(struct mv643xx_private *mp); -static void eth_port_reset(struct mv643xx_private *mp); -static void eth_port_start(struct net_device *dev); -static void ethernet_phy_reset(struct mv643xx_private *mp); +/* port register accessors **************************************************/ +static inline u32 rdl(struct mv643xx_private *mp, int offset) +{ + return readl(mp->shared->eth_base + offset); +} -static void eth_port_write_smi_reg(struct mv643xx_private *mp, - unsigned int phy_reg, unsigned int value); +static inline void wrl(struct mv643xx_private *mp, int offset, u32 data) +{ + writel(data, mp->shared->eth_base + offset); +} -static void eth_port_read_smi_reg(struct mv643xx_private *mp, - unsigned int phy_reg, unsigned int *value); -static void eth_clear_mib_counters(struct mv643xx_private *mp); +/* rxq/txq helper functions *************************************************/ +static void mv643xx_eth_port_enable_rx(struct mv643xx_private *mp, + unsigned int queues) +{ + wrl(mp, RECEIVE_QUEUE_COMMAND_REG(mp->port_num), queues); +} -static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp, - struct pkt_info *p_pkt_info); -static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp, - struct pkt_info *p_pkt_info); +static unsigned int mv643xx_eth_port_disable_rx(struct mv643xx_private *mp) +{ + unsigned int port_num = mp->port_num; + u32 queues; -static void eth_port_uc_addr_get(struct mv643xx_private *mp, - unsigned char *p_addr); -static void eth_port_uc_addr_set(struct mv643xx_private *mp, - unsigned char *p_addr); -static void eth_port_set_multicast_list(struct net_device *); -static void mv643xx_eth_port_enable_tx(struct mv643xx_private *mp, - unsigned int queues); -static void mv643xx_eth_port_enable_rx(struct mv643xx_private *mp, - unsigned int queues); -static unsigned int mv643xx_eth_port_disable_tx(struct mv643xx_private *mp); -static unsigned int mv643xx_eth_port_disable_rx(struct mv643xx_private *mp); -static int mv643xx_eth_open(struct net_device *); -static int mv643xx_eth_stop(struct net_device *); -static void eth_port_init_mac_tables(struct mv643xx_private *mp); -#ifdef MV643XX_NAPI -static int mv643xx_poll(struct napi_struct *napi, int budget); -#endif -static int ethernet_phy_get(struct mv643xx_private *mp); -static void ethernet_phy_set(struct mv643xx_private *mp, int phy_addr); -static int ethernet_phy_detect(struct mv643xx_private *mp); -static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location); -static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val); -static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); -static const struct ethtool_ops mv643xx_ethtool_ops; + /* Stop Rx port activity. Check port Rx activity. */ + queues = rdl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num)) & 0xFF; + if (queues) { + /* Issue stop command for active queues only */ + wrl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num), (queues << 8)); -static char mv643xx_driver_name[] = "mv643xx_eth"; -static char mv643xx_driver_version[] = "1.0"; + /* Wait for all Rx activity to terminate. */ + /* Check port cause register that all Rx queues are stopped */ + while (rdl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num)) & 0xFF) + udelay(PHY_WAIT_MICRO_SECONDS); + } -static inline u32 rdl(struct mv643xx_private *mp, int offset) + return queues; +} + +static void mv643xx_eth_port_enable_tx(struct mv643xx_private *mp, + unsigned int queues) { - return readl(mp->shared->eth_base + offset); + wrl(mp, TRANSMIT_QUEUE_COMMAND_REG(mp->port_num), queues); } -static inline void wrl(struct mv643xx_private *mp, int offset, u32 data) +static unsigned int mv643xx_eth_port_disable_tx(struct mv643xx_private *mp) { - writel(data, mp->shared->eth_base + offset); + unsigned int port_num = mp->port_num; + u32 queues; + + /* Stop Tx port activity. Check port Tx activity. */ + queues = rdl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num)) & 0xFF; + if (queues) { + /* Issue stop command for active queues only */ + wrl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num), (queues << 8)); + + /* Wait for all Tx activity to terminate. */ + /* Check port cause register that all Tx queues are stopped */ + while (rdl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num)) & 0xFF) + udelay(PHY_WAIT_MICRO_SECONDS); + + /* Wait for Tx FIFO to empty */ + while (rdl(mp, PORT_STATUS_REG(port_num)) & + ETH_PORT_TX_FIFO_EMPTY) + udelay(PHY_WAIT_MICRO_SECONDS); + } + + return queues; } + +/* rx ***********************************************************************/ +static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev); + /* - * Changes MTU (maximum transfer unit) of the gigabit ethenret port + * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring. * - * Input : pointer to ethernet interface network device structure - * new mtu size - * Output : 0 upon success, -EINVAL upon failure + * DESCRIPTION: + * This routine returns a Rx buffer back to the Rx ring. It retrieves the + * next 'used' descriptor and attached the returned buffer to it. + * In case the Rx ring was in "resource error" condition, where there are + * no available Rx resources, the function resets the resource error flag. + * + * INPUT: + * struct mv643xx_private *mp Ethernet Port Control srtuct. + * struct pkt_info *p_pkt_info Information on returned buffer. + * + * OUTPUT: + * New available Rx resource in Rx descriptor ring. + * + * RETURN: + * ETH_ERROR in case the routine can not access Rx desc ring. + * ETH_OK otherwise. */ -static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) +static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp, + struct pkt_info *p_pkt_info) { - if ((new_mtu > 9500) || (new_mtu < 64)) - return -EINVAL; + int used_rx_desc; /* Where to return Rx resource */ + volatile struct eth_rx_desc *p_used_rx_desc; + unsigned long flags; - dev->mtu = new_mtu; - if (!netif_running(dev)) - return 0; + spin_lock_irqsave(&mp->lock, flags); - /* - * Stop and then re-open the interface. This will allocate RX - * skbs of the new MTU. - * There is a possible danger that the open will not succeed, - * due to memory being full, which might fail the open function. - */ - mv643xx_eth_stop(dev); - if (mv643xx_eth_open(dev)) { - printk(KERN_ERR "%s: Fatal error on opening device\n", - dev->name); - } + /* Get 'used' Rx descriptor */ + used_rx_desc = mp->rx_used_desc_q; + p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc]; - return 0; + p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr; + p_used_rx_desc->buf_size = p_pkt_info->byte_cnt; + mp->rx_skb[used_rx_desc] = p_pkt_info->return_info; + + /* Flush the write pipe */ + + /* Return the descriptor to DMA ownership */ + wmb(); + p_used_rx_desc->cmd_sts = + ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT; + wmb(); + + /* Move the used descriptor pointer to the next descriptor */ + mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size; + + /* Any Rx return cancels the Rx resource error status */ + mp->rx_resource_err = 0; + + spin_unlock_irqrestore(&mp->lock, flags); + + return ETH_OK; } /* @@ -736,184 +784,81 @@ static inline void mv643xx_eth_rx_refill_descs_timer_wrapper(unsigned long data) } /* - * mv643xx_eth_update_mac_address + * eth_port_receive - Get received information from Rx ring. * - * Update the MAC address of the port in the address table + * DESCRIPTION: + * This routine returns the received data to the caller. There is no + * data copying during routine operation. All information is returned + * using pointer to packet information struct passed from the caller. + * If the routine exhausts Rx ring resources then the resource error flag + * is set. * - * Input : pointer to ethernet interface network device structure - * Output : N/A - */ -static void mv643xx_eth_update_mac_address(struct net_device *dev) -{ - struct mv643xx_private *mp = netdev_priv(dev); - - eth_port_init_mac_tables(mp); - eth_port_uc_addr_set(mp, dev->dev_addr); -} - -/* - * mv643xx_eth_set_rx_mode + * INPUT: + * struct mv643xx_private *mp Ethernet Port Control srtuct. + * struct pkt_info *p_pkt_info User packet buffer. * - * Change from promiscuos to regular rx mode + * OUTPUT: + * Rx ring current and used indexes are updated. * - * Input : pointer to ethernet interface network device structure - * Output : N/A + * RETURN: + * ETH_ERROR in case the routine can not access Rx desc ring. + * ETH_QUEUE_FULL if Rx ring resources are exhausted. + * ETH_END_OF_JOB if there is no received data. + * ETH_OK otherwise. */ -static void mv643xx_eth_set_rx_mode(struct net_device *dev) +static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp, + struct pkt_info *p_pkt_info) { - struct mv643xx_private *mp = netdev_priv(dev); - u32 config_reg; + int rx_next_curr_desc, rx_curr_desc, rx_used_desc; + volatile struct eth_rx_desc *p_rx_desc; + unsigned int command_status; + unsigned long flags; - config_reg = rdl(mp, PORT_CONFIG_REG(mp->port_num)); - if (dev->flags & IFF_PROMISC) - config_reg |= (u32) UNICAST_PROMISCUOUS_MODE; - else - config_reg &= ~(u32) UNICAST_PROMISCUOUS_MODE; - wrl(mp, PORT_CONFIG_REG(mp->port_num), config_reg); + /* Do not process Rx ring in case of Rx ring resource error */ + if (mp->rx_resource_err) + return ETH_QUEUE_FULL; - eth_port_set_multicast_list(dev); -} + spin_lock_irqsave(&mp->lock, flags); -/* - * mv643xx_eth_set_mac_address - * - * Change the interface's mac address. - * No special hardware thing should be done because interface is always - * put in promiscuous mode. - * - * Input : pointer to ethernet interface network device structure and - * a pointer to the designated entry to be added to the cache. - * Output : zero upon success, negative upon failure - */ -static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) -{ - int i; + /* Get the Rx Desc ring 'curr and 'used' indexes */ + rx_curr_desc = mp->rx_curr_desc_q; + rx_used_desc = mp->rx_used_desc_q; - for (i = 0; i < 6; i++) - /* +2 is for the offset of the HW addr type */ - dev->dev_addr[i] = ((unsigned char *)addr)[i + 2]; - mv643xx_eth_update_mac_address(dev); - return 0; -} + p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc]; -/* - * mv643xx_eth_tx_timeout - * - * Called upon a timeout on transmitting a packet - * - * Input : pointer to ethernet interface network device structure. - * Output : N/A - */ -static void mv643xx_eth_tx_timeout(struct net_device *dev) -{ - struct mv643xx_private *mp = netdev_priv(dev); - - printk(KERN_INFO "%s: TX timeout ", dev->name); - - /* Do the reset outside of interrupt context */ - schedule_work(&mp->tx_timeout_task); -} - -/* - * mv643xx_eth_tx_timeout_task - * - * Actual routine to reset the adapter when a timeout on Tx has occurred - */ -static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly) -{ - struct mv643xx_private *mp = container_of(ugly, struct mv643xx_private, - tx_timeout_task); - struct net_device *dev = mp->dev; - - if (!netif_running(dev)) - return; - - netif_stop_queue(dev); - - eth_port_reset(mp); - eth_port_start(dev); - - if (mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) - netif_wake_queue(dev); -} - -/** - * mv643xx_eth_free_tx_descs - Free the tx desc data for completed descriptors - * - * If force is non-zero, frees uncompleted descriptors as well - */ -static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force) -{ - struct mv643xx_private *mp = netdev_priv(dev); - struct eth_tx_desc *desc; - u32 cmd_sts; - struct sk_buff *skb; - unsigned long flags; - int tx_index; - dma_addr_t addr; - int count; - int released = 0; - - while (mp->tx_desc_count > 0) { - spin_lock_irqsave(&mp->lock, flags); - - /* tx_desc_count might have changed before acquiring the lock */ - if (mp->tx_desc_count <= 0) { - spin_unlock_irqrestore(&mp->lock, flags); - return released; - } - - tx_index = mp->tx_used_desc_q; - desc = &mp->p_tx_desc_area[tx_index]; - cmd_sts = desc->cmd_sts; - - if (!force && (cmd_sts & ETH_BUFFER_OWNED_BY_DMA)) { - spin_unlock_irqrestore(&mp->lock, flags); - return released; - } - - mp->tx_used_desc_q = (tx_index + 1) % mp->tx_ring_size; - mp->tx_desc_count--; - - addr = desc->buf_ptr; - count = desc->byte_cnt; - skb = mp->tx_skb[tx_index]; - if (skb) - mp->tx_skb[tx_index] = NULL; - - if (cmd_sts & ETH_ERROR_SUMMARY) { - printk("%s: Error in TX\n", dev->name); - dev->stats.tx_errors++; - } + /* The following parameters are used to save readings from memory */ + command_status = p_rx_desc->cmd_sts; + rmb(); + /* Nothing to receive... */ + if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) { spin_unlock_irqrestore(&mp->lock, flags); + return ETH_END_OF_JOB; + } - if (cmd_sts & ETH_TX_FIRST_DESC) - dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE); - else - dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE); - - if (skb) - dev_kfree_skb_irq(skb); + p_pkt_info->byte_cnt = (p_rx_desc->byte_cnt) - RX_BUF_OFFSET; + p_pkt_info->cmd_sts = command_status; + p_pkt_info->buf_ptr = (p_rx_desc->buf_ptr) + RX_BUF_OFFSET; + p_pkt_info->return_info = mp->rx_skb[rx_curr_desc]; + p_pkt_info->l4i_chk = p_rx_desc->buf_size; - released = 1; - } + /* + * Clean the return info field to indicate that the + * packet has been moved to the upper layers + */ + mp->rx_skb[rx_curr_desc] = NULL; - return released; -} + /* Update current index in data structure */ + rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size; + mp->rx_curr_desc_q = rx_next_curr_desc; -static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev) -{ - struct mv643xx_private *mp = netdev_priv(dev); + /* Rx descriptors exhausted. Set the Rx ring resource error flag */ + if (rx_next_curr_desc == rx_used_desc) + mp->rx_resource_err = 1; - if (mv643xx_eth_free_tx_descs(dev, 0) && - mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) - netif_wake_queue(dev); -} + spin_unlock_irqrestore(&mp->lock, flags); -static void mv643xx_eth_free_all_tx_descs(struct net_device *dev) -{ - mv643xx_eth_free_tx_descs(dev, 1); + return ETH_OK; } /* @@ -996,296 +941,458 @@ static int mv643xx_eth_receive_queue(struct net_device *dev, int budget) return received_packets; } -/* Set the mv643xx port configuration register for the speed/duplex mode. */ -static void mv643xx_eth_update_pscr(struct net_device *dev, - struct ethtool_cmd *ecmd) +#ifdef MV643XX_NAPI +/* + * mv643xx_poll + * + * This function is used in case of NAPI + */ +static int mv643xx_poll(struct napi_struct *napi, int budget) { - struct mv643xx_private *mp = netdev_priv(dev); - int port_num = mp->port_num; - u32 o_pscr, n_pscr; - unsigned int queues; - - o_pscr = rdl(mp, PORT_SERIAL_CONTROL_REG(port_num)); - n_pscr = o_pscr; - - /* clear speed, duplex and rx buffer size fields */ - n_pscr &= ~(SET_MII_SPEED_TO_100 | - SET_GMII_SPEED_TO_1000 | - SET_FULL_DUPLEX_MODE | - MAX_RX_PACKET_MASK); - - if (ecmd->duplex == DUPLEX_FULL) - n_pscr |= SET_FULL_DUPLEX_MODE; + struct mv643xx_private *mp = container_of(napi, struct mv643xx_private, napi); + struct net_device *dev = mp->dev; + unsigned int port_num = mp->port_num; + int work_done; - if (ecmd->speed == SPEED_1000) - n_pscr |= SET_GMII_SPEED_TO_1000 | - MAX_RX_PACKET_9700BYTE; - else { - if (ecmd->speed == SPEED_100) - n_pscr |= SET_MII_SPEED_TO_100; - n_pscr |= MAX_RX_PACKET_1522BYTE; +#ifdef MV643XX_TX_FAST_REFILL + if (++mp->tx_clean_threshold > 5) { + mv643xx_eth_free_completed_tx_descs(dev); + mp->tx_clean_threshold = 0; } +#endif - if (n_pscr != o_pscr) { - if ((o_pscr & SERIAL_PORT_ENABLE) == 0) - wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); - else { - queues = mv643xx_eth_port_disable_tx(mp); + work_done = 0; + if ((rdl(mp, RX_CURRENT_QUEUE_DESC_PTR_0(port_num))) + != (u32) mp->rx_used_desc_q) + work_done = mv643xx_eth_receive_queue(dev, budget); - o_pscr &= ~SERIAL_PORT_ENABLE; - wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), o_pscr); - wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); - wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); - if (queues) - mv643xx_eth_port_enable_tx(mp, queues); - } + if (work_done < budget) { + netif_rx_complete(dev, napi); + wrl(mp, INTERRUPT_CAUSE_REG(port_num), 0); + wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); } + + return work_done; } +#endif -/* - * mv643xx_eth_int_handler - * - * Main interrupt handler for the gigbit ethernet ports + +/* tx ***********************************************************************/ +/** + * has_tiny_unaligned_frags - check if skb has any small, unaligned fragments * - * Input : irq - irq number (not used) - * dev_id - a pointer to the required interface's data structure - * regs - not used - * Output : N/A + * Hardware can't handle unaligned fragments smaller than 9 bytes. + * This helper function detects that case. */ -static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) +static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) { - struct net_device *dev = (struct net_device *)dev_id; - struct mv643xx_private *mp = netdev_priv(dev); - u32 eth_int_cause, eth_int_cause_ext = 0; - unsigned int port_num = mp->port_num; + unsigned int frag; + skb_frag_t *fragp; - /* Read interrupt cause registers */ - eth_int_cause = rdl(mp, INTERRUPT_CAUSE_REG(port_num)) & - ETH_INT_UNMASK_ALL; - if (eth_int_cause & ETH_INT_CAUSE_EXT) { - eth_int_cause_ext = rdl(mp, - INTERRUPT_CAUSE_EXTEND_REG(port_num)) & - ETH_INT_UNMASK_ALL_EXT; - wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), - ~eth_int_cause_ext); + for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { + fragp = &skb_shinfo(skb)->frags[frag]; + if (fragp->size <= 8 && fragp->page_offset & 0x7) + return 1; } + return 0; +} - /* PHY status changed */ - if (eth_int_cause_ext & (ETH_INT_CAUSE_PHY | ETH_INT_CAUSE_STATE)) { - struct ethtool_cmd cmd; +/** + * eth_alloc_tx_desc_index - return the index of the next available tx desc + */ +static int eth_alloc_tx_desc_index(struct mv643xx_private *mp) +{ + int tx_desc_curr; - if (mii_link_ok(&mp->mii)) { - mii_ethtool_gset(&mp->mii, &cmd); - mv643xx_eth_update_pscr(dev, &cmd); - mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); - if (!netif_carrier_ok(dev)) { - netif_carrier_on(dev); - if (mp->tx_ring_size - mp->tx_desc_count >= - MAX_DESCS_PER_SKB) - netif_wake_queue(dev); - } - } else if (netif_carrier_ok(dev)) { - netif_stop_queue(dev); - netif_carrier_off(dev); - } - } + BUG_ON(mp->tx_desc_count >= mp->tx_ring_size); -#ifdef MV643XX_NAPI - if (eth_int_cause & ETH_INT_CAUSE_RX) { - /* schedule the NAPI poll routine to maintain port */ - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); + tx_desc_curr = mp->tx_curr_desc_q; + mp->tx_curr_desc_q = (tx_desc_curr + 1) % mp->tx_ring_size; - /* wait for previous write to complete */ - rdl(mp, INTERRUPT_MASK_REG(port_num)); + BUG_ON(mp->tx_curr_desc_q == mp->tx_used_desc_q); - netif_rx_schedule(dev, &mp->napi); - } -#else - if (eth_int_cause & ETH_INT_CAUSE_RX) - mv643xx_eth_receive_queue(dev, INT_MAX); -#endif - if (eth_int_cause_ext & ETH_INT_CAUSE_TX) - mv643xx_eth_free_completed_tx_descs(dev); + return tx_desc_curr; +} - /* - * If no real interrupt occured, exit. - * This can happen when using gigE interrupt coalescing mechanism. - */ - if ((eth_int_cause == 0x0) && (eth_int_cause_ext == 0x0)) - return IRQ_NONE; +/** + * eth_tx_fill_frag_descs - fill tx hw descriptors for an skb's fragments. + * + * Ensure the data for each fragment to be transmitted is mapped properly, + * then fill in descriptors in the tx hw queue. + */ +static void eth_tx_fill_frag_descs(struct mv643xx_private *mp, + struct sk_buff *skb) +{ + int frag; + int tx_index; + struct eth_tx_desc *desc; - return IRQ_HANDLED; + for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { + skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; + + tx_index = eth_alloc_tx_desc_index(mp); + desc = &mp->p_tx_desc_area[tx_index]; + + desc->cmd_sts = ETH_BUFFER_OWNED_BY_DMA; + /* Last Frag enables interrupt and frees the skb */ + if (frag == (skb_shinfo(skb)->nr_frags - 1)) { + desc->cmd_sts |= ETH_ZERO_PADDING | + ETH_TX_LAST_DESC | + ETH_TX_ENABLE_INTERRUPT; + mp->tx_skb[tx_index] = skb; + } else + mp->tx_skb[tx_index] = NULL; + + desc = &mp->p_tx_desc_area[tx_index]; + desc->l4i_chk = 0; + desc->byte_cnt = this_frag->size; + desc->buf_ptr = dma_map_page(NULL, this_frag->page, + this_frag->page_offset, + this_frag->size, + DMA_TO_DEVICE); + } } -#ifdef MV643XX_COAL +static inline __be16 sum16_as_be(__sum16 sum) +{ + return (__force __be16)sum; +} -/* - * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path - * - * DESCRIPTION: - * This routine sets the RX coalescing interrupt mechanism parameter. - * This parameter is a timeout counter, that counts in 64 t_clk - * chunks ; that when timeout event occurs a maskable interrupt - * occurs. - * The parameter is calculated using the tClk of the MV-643xx chip - * , and the required delay of the interrupt in usec. - * - * INPUT: - * struct mv643xx_private *mp Ethernet port - * unsigned int delay Delay in usec - * - * OUTPUT: - * Interrupt coalescing mechanism value is set in MV-643xx chip. - * - * RETURN: - * The interrupt coalescing value set in the gigE port. +/** + * eth_tx_submit_descs_for_skb - submit data from an skb to the tx hw * + * Ensure the data for an skb to be transmitted is mapped properly, + * then fill in descriptors in the tx hw queue and start the hardware. */ -static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp, - unsigned int delay) +static void eth_tx_submit_descs_for_skb(struct mv643xx_private *mp, + struct sk_buff *skb) { - unsigned int port_num = mp->port_num; - unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; + int tx_index; + struct eth_tx_desc *desc; + u32 cmd_sts; + int length; + int nr_frags = skb_shinfo(skb)->nr_frags; - /* Set RX Coalescing mechanism */ - wrl(mp, SDMA_CONFIG_REG(port_num), - ((coal & 0x3fff) << 8) | - (rdl(mp, SDMA_CONFIG_REG(port_num)) - & 0xffc000ff)); + cmd_sts = ETH_TX_FIRST_DESC | ETH_GEN_CRC | ETH_BUFFER_OWNED_BY_DMA; - return coal; + tx_index = eth_alloc_tx_desc_index(mp); + desc = &mp->p_tx_desc_area[tx_index]; + + if (nr_frags) { + eth_tx_fill_frag_descs(mp, skb); + + length = skb_headlen(skb); + mp->tx_skb[tx_index] = NULL; + } else { + cmd_sts |= ETH_ZERO_PADDING | + ETH_TX_LAST_DESC | + ETH_TX_ENABLE_INTERRUPT; + length = skb->len; + mp->tx_skb[tx_index] = skb; + } + + desc->byte_cnt = length; + desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + BUG_ON(skb->protocol != htons(ETH_P_IP)); + + cmd_sts |= ETH_GEN_TCP_UDP_CHECKSUM | + ETH_GEN_IP_V_4_CHECKSUM | + ip_hdr(skb)->ihl << ETH_TX_IHL_SHIFT; + + switch (ip_hdr(skb)->protocol) { + case IPPROTO_UDP: + cmd_sts |= ETH_UDP_FRAME; + desc->l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check)); + break; + case IPPROTO_TCP: + desc->l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check)); + break; + default: + BUG(); + } + } else { + /* Errata BTS #50, IHL must be 5 if no HW checksum */ + cmd_sts |= 5 << ETH_TX_IHL_SHIFT; + desc->l4i_chk = 0; + } + + /* ensure all other descriptors are written before first cmd_sts */ + wmb(); + desc->cmd_sts = cmd_sts; + + /* ensure all descriptors are written before poking hardware */ + wmb(); + mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); + + mp->tx_desc_count += nr_frags + 1; } -#endif -/* - * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path - * - * DESCRIPTION: - * This routine sets the TX coalescing interrupt mechanism parameter. - * This parameter is a timeout counter, that counts in 64 t_clk - * chunks ; that when timeout event occurs a maskable interrupt - * occurs. - * The parameter is calculated using the t_cLK frequency of the - * MV-643xx chip and the required delay in the interrupt in uSec - * - * INPUT: - * struct mv643xx_private *mp Ethernet port - * unsigned int delay Delay in uSeconds - * - * OUTPUT: - * Interrupt coalescing mechanism value is set in MV-643xx chip. - * - * RETURN: - * The interrupt coalescing value set in the gigE port. +/** + * mv643xx_eth_start_xmit - queue an skb to the hardware for transmission * */ -static unsigned int eth_port_set_tx_coal(struct mv643xx_private *mp, - unsigned int delay) +static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) { - unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; + struct mv643xx_private *mp = netdev_priv(dev); + struct net_device_stats *stats = &dev->stats; + unsigned long flags; - /* Set TX Coalescing mechanism */ - wrl(mp, TX_FIFO_URGENT_THRESHOLD_REG(mp->port_num), coal << 4); + BUG_ON(netif_queue_stopped(dev)); - return coal; + if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { + stats->tx_dropped++; + printk(KERN_DEBUG "%s: failed to linearize tiny " + "unaligned fragment\n", dev->name); + return NETDEV_TX_BUSY; + } + + spin_lock_irqsave(&mp->lock, flags); + + if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) { + printk(KERN_ERR "%s: transmit with queue full\n", dev->name); + netif_stop_queue(dev); + spin_unlock_irqrestore(&mp->lock, flags); + return NETDEV_TX_BUSY; + } + + eth_tx_submit_descs_for_skb(mp, skb); + stats->tx_bytes += skb->len; + stats->tx_packets++; + dev->trans_start = jiffies; + + if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) + netif_stop_queue(dev); + + spin_unlock_irqrestore(&mp->lock, flags); + + return NETDEV_TX_OK; } + +/* mii management interface *************************************************/ +static int ethernet_phy_get(struct mv643xx_private *mp); + /* - * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory. + * eth_port_read_smi_reg - Read PHY registers * * DESCRIPTION: - * This function prepares a Rx chained list of descriptors and packet - * buffers in a form of a ring. The routine must be called after port - * initialization routine and before port start routine. - * The Ethernet SDMA engine uses CPU bus addresses to access the various - * devices in the system (i.e. DRAM). This function uses the ethernet - * struct 'virtual to physical' routine (set by the user) to set the ring - * with physical addresses. + * This routine utilize the SMI interface to interact with the PHY in + * order to perform PHY register read. * * INPUT: - * struct mv643xx_private *mp Ethernet Port Control srtuct. + * struct mv643xx_private *mp Ethernet Port. + * unsigned int phy_reg PHY register address offset. + * unsigned int *value Register value buffer. * * OUTPUT: - * The routine updates the Ethernet port control struct with information - * regarding the Rx descriptors and buffers. + * Write the value of a specified PHY register into given buffer. * * RETURN: - * None. + * false if the PHY is busy or read data is not in valid state. + * true otherwise. + * */ -static void ether_init_rx_desc_ring(struct mv643xx_private *mp) +static void eth_port_read_smi_reg(struct mv643xx_private *mp, + unsigned int phy_reg, unsigned int *value) { - volatile struct eth_rx_desc *p_rx_desc; - int rx_desc_num = mp->rx_ring_size; + void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG; + int phy_addr = ethernet_phy_get(mp); + unsigned long flags; int i; - /* initialize the next_desc_ptr links in the Rx descriptors ring */ - p_rx_desc = (struct eth_rx_desc *)mp->p_rx_desc_area; - for (i = 0; i < rx_desc_num; i++) { - p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma + - ((i + 1) % rx_desc_num) * sizeof(struct eth_rx_desc); + /* the SMI register is a shared resource */ + spin_lock_irqsave(&mp->shared_smi->phy_lock, flags); + + /* wait for the SMI register to become available */ + for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) { + if (i == PHY_WAIT_ITERATIONS) { + printk("%s: PHY busy timeout\n", mp->dev->name); + goto out; + } + udelay(PHY_WAIT_MICRO_SECONDS); } - /* Save Rx desc pointer to driver struct. */ - mp->rx_curr_desc_q = 0; - mp->rx_used_desc_q = 0; + writel((phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ, + smi_reg); - mp->rx_desc_area_size = rx_desc_num * sizeof(struct eth_rx_desc); + /* now wait for the data to be valid */ + for (i = 0; !(readl(smi_reg) & ETH_SMI_READ_VALID); i++) { + if (i == PHY_WAIT_ITERATIONS) { + printk("%s: PHY read timeout\n", mp->dev->name); + goto out; + } + udelay(PHY_WAIT_MICRO_SECONDS); + } + + *value = readl(smi_reg) & 0xffff; +out: + spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags); } /* - * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory. + * eth_port_write_smi_reg - Write to PHY registers * * DESCRIPTION: - * This function prepares a Tx chained list of descriptors and packet - * buffers in a form of a ring. The routine must be called after port - * initialization routine and before port start routine. - * The Ethernet SDMA engine uses CPU bus addresses to access the various - * devices in the system (i.e. DRAM). This function uses the ethernet - * struct 'virtual to physical' routine (set by the user) to set the ring - * with physical addresses. + * This routine utilize the SMI interface to interact with the PHY in + * order to perform writes to PHY registers. * * INPUT: - * struct mv643xx_private *mp Ethernet Port Control srtuct. + * struct mv643xx_private *mp Ethernet Port. + * unsigned int phy_reg PHY register address offset. + * unsigned int value Register value. * * OUTPUT: - * The routine updates the Ethernet port control struct with information - * regarding the Tx descriptors and buffers. + * Write the given value to the specified PHY register. * * RETURN: - * None. + * false if the PHY is busy. + * true otherwise. + * */ -static void ether_init_tx_desc_ring(struct mv643xx_private *mp) +static void eth_port_write_smi_reg(struct mv643xx_private *mp, + unsigned int phy_reg, unsigned int value) { - int tx_desc_num = mp->tx_ring_size; - struct eth_tx_desc *p_tx_desc; + void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG; + int phy_addr = ethernet_phy_get(mp); + unsigned long flags; int i; - /* Initialize the next_desc_ptr links in the Tx descriptors ring */ - p_tx_desc = (struct eth_tx_desc *)mp->p_tx_desc_area; - for (i = 0; i < tx_desc_num; i++) { - p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma + - ((i + 1) % tx_desc_num) * sizeof(struct eth_tx_desc); + /* the SMI register is a shared resource */ + spin_lock_irqsave(&mp->shared_smi->phy_lock, flags); + + /* wait for the SMI register to become available */ + for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) { + if (i == PHY_WAIT_ITERATIONS) { + printk("%s: PHY busy timeout\n", mp->dev->name); + goto out; + } + udelay(PHY_WAIT_MICRO_SECONDS); } - mp->tx_curr_desc_q = 0; - mp->tx_used_desc_q = 0; + writel((phy_addr << 16) | (phy_reg << 21) | + ETH_SMI_OPCODE_WRITE | (value & 0xffff), smi_reg); +out: + spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags); +} - mp->tx_desc_area_size = tx_desc_num * sizeof(struct eth_tx_desc); + +/* mib counters *************************************************************/ +/* + * eth_clear_mib_counters - Clear all MIB counters + * + * DESCRIPTION: + * This function clears all MIB counters of a specific ethernet port. + * A read from the MIB counter will reset the counter. + * + * INPUT: + * struct mv643xx_private *mp Ethernet Port. + * + * OUTPUT: + * After reading all MIB counters, the counters resets. + * + * RETURN: + * MIB counter value. + * + */ +static void eth_clear_mib_counters(struct mv643xx_private *mp) +{ + unsigned int port_num = mp->port_num; + int i; + + /* Perform dummy reads from MIB counters */ + for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION; + i += 4) + rdl(mp, MIB_COUNTERS_BASE(port_num) + i); } -static int mv643xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +static inline u32 read_mib(struct mv643xx_private *mp, int offset) { - struct mv643xx_private *mp = netdev_priv(dev); - int err; + return rdl(mp, MIB_COUNTERS_BASE(mp->port_num) + offset); +} - spin_lock_irq(&mp->lock); - err = mii_ethtool_sset(&mp->mii, cmd); - spin_unlock_irq(&mp->lock); +static void eth_update_mib_counters(struct mv643xx_private *mp) +{ + struct mv643xx_mib_counters *p = &mp->mib_counters; + int offset; - return err; + p->good_octets_received += + read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW); + p->good_octets_received += + (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32; + + for (offset = ETH_MIB_BAD_OCTETS_RECEIVED; + offset <= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS; + offset += 4) + *(u32 *)((char *)p + offset) += read_mib(mp, offset); + + p->good_octets_sent += read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_LOW); + p->good_octets_sent += + (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_HIGH) << 32; + + for (offset = ETH_MIB_GOOD_FRAMES_SENT; + offset <= ETH_MIB_LATE_COLLISION; + offset += 4) + *(u32 *)((char *)p + offset) += read_mib(mp, offset); } + +/* ethtool ******************************************************************/ +struct mv643xx_stats { + char stat_string[ETH_GSTRING_LEN]; + int sizeof_stat; + int stat_offset; +}; + +#define MV643XX_STAT(m) FIELD_SIZEOF(struct mv643xx_private, m), \ + offsetof(struct mv643xx_private, m) + +static const struct mv643xx_stats mv643xx_gstrings_stats[] = { + { "rx_packets", MV643XX_STAT(stats.rx_packets) }, + { "tx_packets", MV643XX_STAT(stats.tx_packets) }, + { "rx_bytes", MV643XX_STAT(stats.rx_bytes) }, + { "tx_bytes", MV643XX_STAT(stats.tx_bytes) }, + { "rx_errors", MV643XX_STAT(stats.rx_errors) }, + { "tx_errors", MV643XX_STAT(stats.tx_errors) }, + { "rx_dropped", MV643XX_STAT(stats.rx_dropped) }, + { "tx_dropped", MV643XX_STAT(stats.tx_dropped) }, + { "good_octets_received", MV643XX_STAT(mib_counters.good_octets_received) }, + { "bad_octets_received", MV643XX_STAT(mib_counters.bad_octets_received) }, + { "internal_mac_transmit_err", MV643XX_STAT(mib_counters.internal_mac_transmit_err) }, + { "good_frames_received", MV643XX_STAT(mib_counters.good_frames_received) }, + { "bad_frames_received", MV643XX_STAT(mib_counters.bad_frames_received) }, + { "broadcast_frames_received", MV643XX_STAT(mib_counters.broadcast_frames_received) }, + { "multicast_frames_received", MV643XX_STAT(mib_counters.multicast_frames_received) }, + { "frames_64_octets", MV643XX_STAT(mib_counters.frames_64_octets) }, + { "frames_65_to_127_octets", MV643XX_STAT(mib_counters.frames_65_to_127_octets) }, + { "frames_128_to_255_octets", MV643XX_STAT(mib_counters.frames_128_to_255_octets) }, + { "frames_256_to_511_octets", MV643XX_STAT(mib_counters.frames_256_to_511_octets) }, + { "frames_512_to_1023_octets", MV643XX_STAT(mib_counters.frames_512_to_1023_octets) }, + { "frames_1024_to_max_octets", MV643XX_STAT(mib_counters.frames_1024_to_max_octets) }, + { "good_octets_sent", MV643XX_STAT(mib_counters.good_octets_sent) }, + { "good_frames_sent", MV643XX_STAT(mib_counters.good_frames_sent) }, + { "excessive_collision", MV643XX_STAT(mib_counters.excessive_collision) }, + { "multicast_frames_sent", MV643XX_STAT(mib_counters.multicast_frames_sent) }, + { "broadcast_frames_sent", MV643XX_STAT(mib_counters.broadcast_frames_sent) }, + { "unrec_mac_control_received", MV643XX_STAT(mib_counters.unrec_mac_control_received) }, + { "fc_sent", MV643XX_STAT(mib_counters.fc_sent) }, + { "good_fc_received", MV643XX_STAT(mib_counters.good_fc_received) }, + { "bad_fc_received", MV643XX_STAT(mib_counters.bad_fc_received) }, + { "undersize_received", MV643XX_STAT(mib_counters.undersize_received) }, + { "fragments_received", MV643XX_STAT(mib_counters.fragments_received) }, + { "oversize_received", MV643XX_STAT(mib_counters.oversize_received) }, + { "jabber_received", MV643XX_STAT(mib_counters.jabber_received) }, + { "mac_receive_error", MV643XX_STAT(mib_counters.mac_receive_error) }, + { "bad_crc_event", MV643XX_STAT(mib_counters.bad_crc_event) }, + { "collision", MV643XX_STAT(mib_counters.collision) }, + { "late_collision", MV643XX_STAT(mib_counters.late_collision) }, +}; + +#define MV643XX_STATS_LEN ARRAY_SIZE(mv643xx_gstrings_stats) + static int mv643xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct mv643xx_private *mp = netdev_priv(dev); @@ -1302,1038 +1409,798 @@ static int mv643xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) return err; } -/* - * mv643xx_eth_open - * - * This function is called when openning the network device. The function - * should initialize all the hardware, initialize cyclic Rx/Tx - * descriptors chain and buffers and allocate an IRQ to the network - * device. - * - * Input : a pointer to the network device structure - * - * Output : zero of success , nonzero if fails. - */ - -static int mv643xx_eth_open(struct net_device *dev) +static int mv643xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct mv643xx_private *mp = netdev_priv(dev); - unsigned int port_num = mp->port_num; - unsigned int size; int err; - /* Clear any pending ethernet port interrupts */ - wrl(mp, INTERRUPT_CAUSE_REG(port_num), 0); - wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); - /* wait for previous write to complete */ - rdl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num)); + spin_lock_irq(&mp->lock); + err = mii_ethtool_sset(&mp->mii, cmd); + spin_unlock_irq(&mp->lock); - err = request_irq(dev->irq, mv643xx_eth_int_handler, - IRQF_SHARED | IRQF_SAMPLE_RANDOM, dev->name, dev); - if (err) { - printk(KERN_ERR "%s: Can not assign IRQ\n", dev->name); - return -EAGAIN; - } + return err; +} - eth_port_init(mp); +static void mv643xx_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + strncpy(drvinfo->driver, mv643xx_driver_name, 32); + strncpy(drvinfo->version, mv643xx_driver_version, 32); + strncpy(drvinfo->fw_version, "N/A", 32); + strncpy(drvinfo->bus_info, "mv643xx", 32); + drvinfo->n_stats = MV643XX_STATS_LEN; +} - memset(&mp->timeout, 0, sizeof(struct timer_list)); - mp->timeout.function = mv643xx_eth_rx_refill_descs_timer_wrapper; - mp->timeout.data = (unsigned long)dev; +static int mv643xx_eth_nway_restart(struct net_device *dev) +{ + struct mv643xx_private *mp = netdev_priv(dev); - /* Allocate RX and TX skb rings */ - mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size, - GFP_KERNEL); - if (!mp->rx_skb) { - printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name); - err = -ENOMEM; - goto out_free_irq; - } - mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size, - GFP_KERNEL); - if (!mp->tx_skb) { - printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name); - err = -ENOMEM; - goto out_free_rx_skb; - } + return mii_nway_restart(&mp->mii); +} - /* Allocate TX ring */ - mp->tx_desc_count = 0; - size = mp->tx_ring_size * sizeof(struct eth_tx_desc); - mp->tx_desc_area_size = size; +static u32 mv643xx_eth_get_link(struct net_device *dev) +{ + struct mv643xx_private *mp = netdev_priv(dev); - if (mp->tx_sram_size) { - mp->p_tx_desc_area = ioremap(mp->tx_sram_addr, - mp->tx_sram_size); - mp->tx_desc_dma = mp->tx_sram_addr; - } else - mp->p_tx_desc_area = dma_alloc_coherent(NULL, size, - &mp->tx_desc_dma, - GFP_KERNEL); + return mii_link_ok(&mp->mii); +} - if (!mp->p_tx_desc_area) { - printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", - dev->name, size); - err = -ENOMEM; - goto out_free_tx_skb; - } - BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */ - memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size); +static void mv643xx_get_strings(struct net_device *netdev, uint32_t stringset, + uint8_t *data) +{ + int i; - ether_init_tx_desc_ring(mp); + switch(stringset) { + case ETH_SS_STATS: + for (i=0; i < MV643XX_STATS_LEN; i++) { + memcpy(data + i * ETH_GSTRING_LEN, + mv643xx_gstrings_stats[i].stat_string, + ETH_GSTRING_LEN); + } + break; + } +} - /* Allocate RX ring */ - mp->rx_desc_count = 0; - size = mp->rx_ring_size * sizeof(struct eth_rx_desc); - mp->rx_desc_area_size = size; +static void mv643xx_get_ethtool_stats(struct net_device *netdev, + struct ethtool_stats *stats, uint64_t *data) +{ + struct mv643xx_private *mp = netdev->priv; + int i; - if (mp->rx_sram_size) { - mp->p_rx_desc_area = ioremap(mp->rx_sram_addr, - mp->rx_sram_size); - mp->rx_desc_dma = mp->rx_sram_addr; - } else - mp->p_rx_desc_area = dma_alloc_coherent(NULL, size, - &mp->rx_desc_dma, - GFP_KERNEL); + eth_update_mib_counters(mp); - if (!mp->p_rx_desc_area) { - printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n", - dev->name, size); - printk(KERN_ERR "%s: Freeing previously allocated TX queues...", - dev->name); - if (mp->rx_sram_size) - iounmap(mp->p_tx_desc_area); - else - dma_free_coherent(NULL, mp->tx_desc_area_size, - mp->p_tx_desc_area, mp->tx_desc_dma); - err = -ENOMEM; - goto out_free_tx_skb; + for (i = 0; i < MV643XX_STATS_LEN; i++) { + char *p = (char *)mp+mv643xx_gstrings_stats[i].stat_offset; + data[i] = (mv643xx_gstrings_stats[i].sizeof_stat == + sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p; } - memset((void *)mp->p_rx_desc_area, 0, size); +} - ether_init_rx_desc_ring(mp); +static int mv643xx_get_sset_count(struct net_device *netdev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return MV643XX_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} - mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */ +static const struct ethtool_ops mv643xx_ethtool_ops = { + .get_settings = mv643xx_get_settings, + .set_settings = mv643xx_set_settings, + .get_drvinfo = mv643xx_get_drvinfo, + .get_link = mv643xx_eth_get_link, + .set_sg = ethtool_op_set_sg, + .get_sset_count = mv643xx_get_sset_count, + .get_ethtool_stats = mv643xx_get_ethtool_stats, + .get_strings = mv643xx_get_strings, + .nway_reset = mv643xx_eth_nway_restart, +}; -#ifdef MV643XX_NAPI - napi_enable(&mp->napi); -#endif - eth_port_start(dev); +/* address handling *********************************************************/ +/* + * eth_port_uc_addr_get - Read the MAC address from the port's hw registers + */ +static void eth_port_uc_addr_get(struct mv643xx_private *mp, + unsigned char *p_addr) +{ + unsigned int port_num = mp->port_num; + unsigned int mac_h; + unsigned int mac_l; - /* Interrupt Coalescing */ + mac_h = rdl(mp, MAC_ADDR_HIGH(port_num)); + mac_l = rdl(mp, MAC_ADDR_LOW(port_num)); -#ifdef MV643XX_COAL - mp->rx_int_coal = - eth_port_set_rx_coal(mp, MV643XX_RX_COAL); -#endif + p_addr[0] = (mac_h >> 24) & 0xff; + p_addr[1] = (mac_h >> 16) & 0xff; + p_addr[2] = (mac_h >> 8) & 0xff; + p_addr[3] = mac_h & 0xff; + p_addr[4] = (mac_l >> 8) & 0xff; + p_addr[5] = mac_l & 0xff; +} - mp->tx_int_coal = - eth_port_set_tx_coal(mp, MV643XX_TX_COAL); +/* + * eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables + * + * DESCRIPTION: + * Go through all the DA filter tables (Unicast, Special Multicast & + * Other Multicast) and set each entry to 0. + * + * INPUT: + * struct mv643xx_private *mp Ethernet Port. + * + * OUTPUT: + * Multicast and Unicast packets are rejected. + * + * RETURN: + * None. + */ +static void eth_port_init_mac_tables(struct mv643xx_private *mp) +{ + unsigned int port_num = mp->port_num; + int table_index; - /* Unmask phy and link status changes interrupts */ - wrl(mp, INTERRUPT_EXTEND_MASK_REG(port_num), ETH_INT_UNMASK_ALL_EXT); + /* Clear DA filter unicast table (Ex_dFUT) */ + for (table_index = 0; table_index <= 0xC; table_index += 4) + wrl(mp, DA_FILTER_UNICAST_TABLE_BASE(port_num) + + table_index, 0); - /* Unmask RX buffer and TX end interrupt */ - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); + for (table_index = 0; table_index <= 0xFC; table_index += 4) { + /* Clear DA filter special multicast table (Ex_dFSMT) */ + wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(port_num) + + table_index, 0); + /* Clear DA filter other multicast table (Ex_dFOMT) */ + wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE(port_num) + + table_index, 0); + } +} - return 0; +/* + * The entries in each table are indexed by a hash of a packet's MAC + * address. One bit in each entry determines whether the packet is + * accepted. There are 4 entries (each 8 bits wide) in each register + * of the table. The bits in each entry are defined as follows: + * 0 Accept=1, Drop=0 + * 3-1 Queue (ETH_Q0=0) + * 7-4 Reserved = 0; + */ +static void eth_port_set_filter_table_entry(struct mv643xx_private *mp, + int table, unsigned char entry) +{ + unsigned int table_reg; + unsigned int tbl_offset; + unsigned int reg_offset; -out_free_tx_skb: - kfree(mp->tx_skb); -out_free_rx_skb: - kfree(mp->rx_skb); -out_free_irq: - free_irq(dev->irq, dev); + tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */ + reg_offset = entry % 4; /* Entry offset within the register */ - return err; + /* Set "accepts frame bit" at specified table entry */ + table_reg = rdl(mp, table + tbl_offset); + table_reg |= 0x01 << (8 * reg_offset); + wrl(mp, table + tbl_offset, table_reg); } -static void mv643xx_eth_free_tx_rings(struct net_device *dev) +/* + * eth_port_uc_addr_set - Write a MAC address into the port's hw registers + */ +static void eth_port_uc_addr_set(struct mv643xx_private *mp, + unsigned char *p_addr) { - struct mv643xx_private *mp = netdev_priv(dev); - - /* Stop Tx Queues */ - mv643xx_eth_port_disable_tx(mp); + unsigned int port_num = mp->port_num; + unsigned int mac_h; + unsigned int mac_l; + int table; - /* Free outstanding skb's on TX ring */ - mv643xx_eth_free_all_tx_descs(dev); + mac_l = (p_addr[4] << 8) | (p_addr[5]); + mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) | + (p_addr[3] << 0); - BUG_ON(mp->tx_used_desc_q != mp->tx_curr_desc_q); + wrl(mp, MAC_ADDR_LOW(port_num), mac_l); + wrl(mp, MAC_ADDR_HIGH(port_num), mac_h); - /* Free TX ring */ - if (mp->tx_sram_size) - iounmap(mp->p_tx_desc_area); - else - dma_free_coherent(NULL, mp->tx_desc_area_size, - mp->p_tx_desc_area, mp->tx_desc_dma); + /* Accept frames with this address */ + table = DA_FILTER_UNICAST_TABLE_BASE(port_num); + eth_port_set_filter_table_entry(mp, table, p_addr[5] & 0x0f); } -static void mv643xx_eth_free_rx_rings(struct net_device *dev) +/* + * mv643xx_eth_update_mac_address + * + * Update the MAC address of the port in the address table + * + * Input : pointer to ethernet interface network device structure + * Output : N/A + */ +static void mv643xx_eth_update_mac_address(struct net_device *dev) { struct mv643xx_private *mp = netdev_priv(dev); - int curr; - - /* Stop RX Queues */ - mv643xx_eth_port_disable_rx(mp); - /* Free preallocated skb's on RX rings */ - for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) { - if (mp->rx_skb[curr]) { - dev_kfree_skb(mp->rx_skb[curr]); - mp->rx_desc_count--; - } - } - - if (mp->rx_desc_count) - printk(KERN_ERR - "%s: Error in freeing Rx Ring. %d skb's still" - " stuck in RX Ring - ignoring them\n", dev->name, - mp->rx_desc_count); - /* Free RX ring */ - if (mp->rx_sram_size) - iounmap(mp->p_rx_desc_area); - else - dma_free_coherent(NULL, mp->rx_desc_area_size, - mp->p_rx_desc_area, mp->rx_desc_dma); -} + eth_port_init_mac_tables(mp); + eth_port_uc_addr_set(mp, dev->dev_addr); +} /* - * mv643xx_eth_stop + * mv643xx_eth_set_mac_address * - * This function is used when closing the network device. - * It updates the hardware, - * release all memory that holds buffers and descriptors and release the IRQ. - * Input : a pointer to the device structure - * Output : zero if success , nonzero if fails + * Change the interface's mac address. + * No special hardware thing should be done because interface is always + * put in promiscuous mode. + * + * Input : pointer to ethernet interface network device structure and + * a pointer to the designated entry to be added to the cache. + * Output : zero upon success, negative upon failure */ - -static int mv643xx_eth_stop(struct net_device *dev) +static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) { - struct mv643xx_private *mp = netdev_priv(dev); - unsigned int port_num = mp->port_num; - - /* Mask all interrupts on ethernet port */ - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); - /* wait for previous write to complete */ - rdl(mp, INTERRUPT_MASK_REG(port_num)); - -#ifdef MV643XX_NAPI - napi_disable(&mp->napi); -#endif - netif_carrier_off(dev); - netif_stop_queue(dev); - - eth_port_reset(mp); - - mv643xx_eth_free_tx_rings(dev); - mv643xx_eth_free_rx_rings(dev); - - free_irq(dev->irq, dev); + int i; + for (i = 0; i < 6; i++) + /* +2 is for the offset of the HW addr type */ + dev->dev_addr[i] = ((unsigned char *)addr)[i + 2]; + mv643xx_eth_update_mac_address(dev); return 0; } -#ifdef MV643XX_NAPI /* - * mv643xx_poll + * eth_port_mc_addr - Multicast address settings. * - * This function is used in case of NAPI + * The MV device supports multicast using two tables: + * 1) Special Multicast Table for MAC addresses of the form + * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF). + * The MAC DA[7:0] bits are used as a pointer to the Special Multicast + * Table entries in the DA-Filter table. + * 2) Other Multicast Table for multicast of another type. A CRC-8bit + * is used as an index to the Other Multicast Table entries in the + * DA-Filter table. This function calculates the CRC-8bit value. + * In either case, eth_port_set_filter_table_entry() is then called + * to set to set the actual table entry. */ -static int mv643xx_poll(struct napi_struct *napi, int budget) +static void eth_port_mc_addr(struct mv643xx_private *mp, unsigned char *p_addr) { - struct mv643xx_private *mp = container_of(napi, struct mv643xx_private, napi); - struct net_device *dev = mp->dev; unsigned int port_num = mp->port_num; - int work_done; + unsigned int mac_h; + unsigned int mac_l; + unsigned char crc_result = 0; + int table; + int mac_array[48]; + int crc[8]; + int i; -#ifdef MV643XX_TX_FAST_REFILL - if (++mp->tx_clean_threshold > 5) { - mv643xx_eth_free_completed_tx_descs(dev); - mp->tx_clean_threshold = 0; + if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) && + (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) { + table = DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(port_num); + eth_port_set_filter_table_entry(mp, table, p_addr[5]); + return; } -#endif - work_done = 0; - if ((rdl(mp, RX_CURRENT_QUEUE_DESC_PTR_0(port_num))) - != (u32) mp->rx_used_desc_q) - work_done = mv643xx_eth_receive_queue(dev, budget); + /* Calculate CRC-8 out of the given address */ + mac_h = (p_addr[0] << 8) | (p_addr[1]); + mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) | + (p_addr[4] << 8) | (p_addr[5] << 0); - if (work_done < budget) { - netif_rx_complete(dev, napi); - wrl(mp, INTERRUPT_CAUSE_REG(port_num), 0); - wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); - } + for (i = 0; i < 32; i++) + mac_array[i] = (mac_l >> i) & 0x1; + for (i = 32; i < 48; i++) + mac_array[i] = (mac_h >> (i - 32)) & 0x1; - return work_done; -} -#endif + crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^ + mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^ + mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^ + mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^ + mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0]; -/** - * has_tiny_unaligned_frags - check if skb has any small, unaligned fragments - * - * Hardware can't handle unaligned fragments smaller than 9 bytes. - * This helper function detects that case. - */ + crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ + mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^ + mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^ + mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^ + mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^ + mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^ + mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0]; -static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) -{ - unsigned int frag; - skb_frag_t *fragp; + crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^ + mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^ + mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^ + mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^ + mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ + mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0]; - for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { - fragp = &skb_shinfo(skb)->frags[frag]; - if (fragp->size <= 8 && fragp->page_offset & 0x7) - return 1; - } - return 0; -} + crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ + mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^ + mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^ + mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ + mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^ + mac_array[3] ^ mac_array[2] ^ mac_array[1]; -/** - * eth_alloc_tx_desc_index - return the index of the next available tx desc - */ -static int eth_alloc_tx_desc_index(struct mv643xx_private *mp) -{ - int tx_desc_curr; + crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^ + mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^ + mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^ + mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^ + mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^ + mac_array[3] ^ mac_array[2]; - BUG_ON(mp->tx_desc_count >= mp->tx_ring_size); + crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^ + mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^ + mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^ + mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^ + mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^ + mac_array[4] ^ mac_array[3]; - tx_desc_curr = mp->tx_curr_desc_q; - mp->tx_curr_desc_q = (tx_desc_curr + 1) % mp->tx_ring_size; + crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^ + mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^ + mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^ + mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^ + mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^ + mac_array[4]; - BUG_ON(mp->tx_curr_desc_q == mp->tx_used_desc_q); + crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^ + mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^ + mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^ + mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^ + mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5]; - return tx_desc_curr; + for (i = 0; i < 8; i++) + crc_result = crc_result | (crc[i] << i); + + table = DA_FILTER_OTHER_MULTICAST_TABLE_BASE(port_num); + eth_port_set_filter_table_entry(mp, table, crc_result); } -/** - * eth_tx_fill_frag_descs - fill tx hw descriptors for an skb's fragments. - * - * Ensure the data for each fragment to be transmitted is mapped properly, - * then fill in descriptors in the tx hw queue. +/* + * Set the entire multicast list based on dev->mc_list. */ -static void eth_tx_fill_frag_descs(struct mv643xx_private *mp, - struct sk_buff *skb) +static void eth_port_set_multicast_list(struct net_device *dev) { - int frag; - int tx_index; - struct eth_tx_desc *desc; - for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { - skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; + struct dev_mc_list *mc_list; + int i; + int table_index; + struct mv643xx_private *mp = netdev_priv(dev); + unsigned int eth_port_num = mp->port_num; - tx_index = eth_alloc_tx_desc_index(mp); - desc = &mp->p_tx_desc_area[tx_index]; + /* If the device is in promiscuous mode or in all multicast mode, + * we will fully populate both multicast tables with accept. + * This is guaranteed to yield a match on all multicast addresses... + */ + if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) { + for (table_index = 0; table_index <= 0xFC; table_index += 4) { + /* Set all entries in DA filter special multicast + * table (Ex_dFSMT) + * Set for ETH_Q0 for now + * Bits + * 0 Accept=1, Drop=0 + * 3-1 Queue ETH_Q0=0 + * 7-4 Reserved = 0; + */ + wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); - desc->cmd_sts = ETH_BUFFER_OWNED_BY_DMA; - /* Last Frag enables interrupt and frees the skb */ - if (frag == (skb_shinfo(skb)->nr_frags - 1)) { - desc->cmd_sts |= ETH_ZERO_PADDING | - ETH_TX_LAST_DESC | - ETH_TX_ENABLE_INTERRUPT; - mp->tx_skb[tx_index] = skb; - } else - mp->tx_skb[tx_index] = NULL; + /* Set all entries in DA filter other multicast + * table (Ex_dFOMT) + * Set for ETH_Q0 for now + * Bits + * 0 Accept=1, Drop=0 + * 3-1 Queue ETH_Q0=0 + * 7-4 Reserved = 0; + */ + wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); + } + return; + } - desc = &mp->p_tx_desc_area[tx_index]; - desc->l4i_chk = 0; - desc->byte_cnt = this_frag->size; - desc->buf_ptr = dma_map_page(NULL, this_frag->page, - this_frag->page_offset, - this_frag->size, - DMA_TO_DEVICE); + /* We will clear out multicast tables every time we get the list. + * Then add the entire new list... + */ + for (table_index = 0; table_index <= 0xFC; table_index += 4) { + /* Clear DA filter special multicast table (Ex_dFSMT) */ + wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE + (eth_port_num) + table_index, 0); + + /* Clear DA filter other multicast table (Ex_dFOMT) */ + wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE + (eth_port_num) + table_index, 0); } -} -static inline __be16 sum16_as_be(__sum16 sum) -{ - return (__force __be16)sum; + /* Get pointer to net_device multicast list and add each one... */ + for (i = 0, mc_list = dev->mc_list; + (i < 256) && (mc_list != NULL) && (i < dev->mc_count); + i++, mc_list = mc_list->next) + if (mc_list->dmi_addrlen == 6) + eth_port_mc_addr(mp, mc_list->dmi_addr); } -/** - * eth_tx_submit_descs_for_skb - submit data from an skb to the tx hw +/* + * mv643xx_eth_set_rx_mode * - * Ensure the data for an skb to be transmitted is mapped properly, - * then fill in descriptors in the tx hw queue and start the hardware. + * Change from promiscuos to regular rx mode + * + * Input : pointer to ethernet interface network device structure + * Output : N/A */ -static void eth_tx_submit_descs_for_skb(struct mv643xx_private *mp, - struct sk_buff *skb) +static void mv643xx_eth_set_rx_mode(struct net_device *dev) { - int tx_index; - struct eth_tx_desc *desc; - u32 cmd_sts; - int length; - int nr_frags = skb_shinfo(skb)->nr_frags; + struct mv643xx_private *mp = netdev_priv(dev); + u32 config_reg; - cmd_sts = ETH_TX_FIRST_DESC | ETH_GEN_CRC | ETH_BUFFER_OWNED_BY_DMA; + config_reg = rdl(mp, PORT_CONFIG_REG(mp->port_num)); + if (dev->flags & IFF_PROMISC) + config_reg |= (u32) UNICAST_PROMISCUOUS_MODE; + else + config_reg &= ~(u32) UNICAST_PROMISCUOUS_MODE; + wrl(mp, PORT_CONFIG_REG(mp->port_num), config_reg); - tx_index = eth_alloc_tx_desc_index(mp); - desc = &mp->p_tx_desc_area[tx_index]; + eth_port_set_multicast_list(dev); +} - if (nr_frags) { - eth_tx_fill_frag_descs(mp, skb); - length = skb_headlen(skb); - mp->tx_skb[tx_index] = NULL; - } else { - cmd_sts |= ETH_ZERO_PADDING | - ETH_TX_LAST_DESC | - ETH_TX_ENABLE_INTERRUPT; - length = skb->len; - mp->tx_skb[tx_index] = skb; +/* rx/tx queue initialisation ***********************************************/ +/* + * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory. + * + * DESCRIPTION: + * This function prepares a Rx chained list of descriptors and packet + * buffers in a form of a ring. The routine must be called after port + * initialization routine and before port start routine. + * The Ethernet SDMA engine uses CPU bus addresses to access the various + * devices in the system (i.e. DRAM). This function uses the ethernet + * struct 'virtual to physical' routine (set by the user) to set the ring + * with physical addresses. + * + * INPUT: + * struct mv643xx_private *mp Ethernet Port Control srtuct. + * + * OUTPUT: + * The routine updates the Ethernet port control struct with information + * regarding the Rx descriptors and buffers. + * + * RETURN: + * None. + */ +static void ether_init_rx_desc_ring(struct mv643xx_private *mp) +{ + volatile struct eth_rx_desc *p_rx_desc; + int rx_desc_num = mp->rx_ring_size; + int i; + + /* initialize the next_desc_ptr links in the Rx descriptors ring */ + p_rx_desc = (struct eth_rx_desc *)mp->p_rx_desc_area; + for (i = 0; i < rx_desc_num; i++) { + p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma + + ((i + 1) % rx_desc_num) * sizeof(struct eth_rx_desc); } - desc->byte_cnt = length; - desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); + /* Save Rx desc pointer to driver struct. */ + mp->rx_curr_desc_q = 0; + mp->rx_used_desc_q = 0; - if (skb->ip_summed == CHECKSUM_PARTIAL) { - BUG_ON(skb->protocol != htons(ETH_P_IP)); + mp->rx_desc_area_size = rx_desc_num * sizeof(struct eth_rx_desc); +} - cmd_sts |= ETH_GEN_TCP_UDP_CHECKSUM | - ETH_GEN_IP_V_4_CHECKSUM | - ip_hdr(skb)->ihl << ETH_TX_IHL_SHIFT; +static void mv643xx_eth_free_rx_rings(struct net_device *dev) +{ + struct mv643xx_private *mp = netdev_priv(dev); + int curr; - switch (ip_hdr(skb)->protocol) { - case IPPROTO_UDP: - cmd_sts |= ETH_UDP_FRAME; - desc->l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check)); - break; - case IPPROTO_TCP: - desc->l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check)); - break; - default: - BUG(); + /* Stop RX Queues */ + mv643xx_eth_port_disable_rx(mp); + + /* Free preallocated skb's on RX rings */ + for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) { + if (mp->rx_skb[curr]) { + dev_kfree_skb(mp->rx_skb[curr]); + mp->rx_desc_count--; } - } else { - /* Errata BTS #50, IHL must be 5 if no HW checksum */ - cmd_sts |= 5 << ETH_TX_IHL_SHIFT; - desc->l4i_chk = 0; } - /* ensure all other descriptors are written before first cmd_sts */ - wmb(); - desc->cmd_sts = cmd_sts; + if (mp->rx_desc_count) + printk(KERN_ERR + "%s: Error in freeing Rx Ring. %d skb's still" + " stuck in RX Ring - ignoring them\n", dev->name, + mp->rx_desc_count); + /* Free RX ring */ + if (mp->rx_sram_size) + iounmap(mp->p_rx_desc_area); + else + dma_free_coherent(NULL, mp->rx_desc_area_size, + mp->p_rx_desc_area, mp->rx_desc_dma); +} - /* ensure all descriptors are written before poking hardware */ - wmb(); - mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); +/* + * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory. + * + * DESCRIPTION: + * This function prepares a Tx chained list of descriptors and packet + * buffers in a form of a ring. The routine must be called after port + * initialization routine and before port start routine. + * The Ethernet SDMA engine uses CPU bus addresses to access the various + * devices in the system (i.e. DRAM). This function uses the ethernet + * struct 'virtual to physical' routine (set by the user) to set the ring + * with physical addresses. + * + * INPUT: + * struct mv643xx_private *mp Ethernet Port Control srtuct. + * + * OUTPUT: + * The routine updates the Ethernet port control struct with information + * regarding the Tx descriptors and buffers. + * + * RETURN: + * None. + */ +static void ether_init_tx_desc_ring(struct mv643xx_private *mp) +{ + int tx_desc_num = mp->tx_ring_size; + struct eth_tx_desc *p_tx_desc; + int i; - mp->tx_desc_count += nr_frags + 1; + /* Initialize the next_desc_ptr links in the Tx descriptors ring */ + p_tx_desc = (struct eth_tx_desc *)mp->p_tx_desc_area; + for (i = 0; i < tx_desc_num; i++) { + p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma + + ((i + 1) % tx_desc_num) * sizeof(struct eth_tx_desc); + } + + mp->tx_curr_desc_q = 0; + mp->tx_used_desc_q = 0; + + mp->tx_desc_area_size = tx_desc_num * sizeof(struct eth_tx_desc); } /** - * mv643xx_eth_start_xmit - queue an skb to the hardware for transmission + * mv643xx_eth_free_tx_descs - Free the tx desc data for completed descriptors * + * If force is non-zero, frees uncompleted descriptors as well */ -static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) +static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force) { struct mv643xx_private *mp = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; + struct eth_tx_desc *desc; + u32 cmd_sts; + struct sk_buff *skb; unsigned long flags; + int tx_index; + dma_addr_t addr; + int count; + int released = 0; - BUG_ON(netif_queue_stopped(dev)); + while (mp->tx_desc_count > 0) { + spin_lock_irqsave(&mp->lock, flags); - if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { - stats->tx_dropped++; - printk(KERN_DEBUG "%s: failed to linearize tiny " - "unaligned fragment\n", dev->name); - return NETDEV_TX_BUSY; - } + /* tx_desc_count might have changed before acquiring the lock */ + if (mp->tx_desc_count <= 0) { + spin_unlock_irqrestore(&mp->lock, flags); + return released; + } - spin_lock_irqsave(&mp->lock, flags); + tx_index = mp->tx_used_desc_q; + desc = &mp->p_tx_desc_area[tx_index]; + cmd_sts = desc->cmd_sts; - if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) { - printk(KERN_ERR "%s: transmit with queue full\n", dev->name); - netif_stop_queue(dev); - spin_unlock_irqrestore(&mp->lock, flags); - return NETDEV_TX_BUSY; - } + if (!force && (cmd_sts & ETH_BUFFER_OWNED_BY_DMA)) { + spin_unlock_irqrestore(&mp->lock, flags); + return released; + } - eth_tx_submit_descs_for_skb(mp, skb); - stats->tx_bytes += skb->len; - stats->tx_packets++; - dev->trans_start = jiffies; + mp->tx_used_desc_q = (tx_index + 1) % mp->tx_ring_size; + mp->tx_desc_count--; - if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) - netif_stop_queue(dev); + addr = desc->buf_ptr; + count = desc->byte_cnt; + skb = mp->tx_skb[tx_index]; + if (skb) + mp->tx_skb[tx_index] = NULL; - spin_unlock_irqrestore(&mp->lock, flags); + if (cmd_sts & ETH_ERROR_SUMMARY) { + printk("%s: Error in TX\n", dev->name); + dev->stats.tx_errors++; + } - return NETDEV_TX_OK; -} + spin_unlock_irqrestore(&mp->lock, flags); -#ifdef CONFIG_NET_POLL_CONTROLLER -static void mv643xx_netpoll(struct net_device *netdev) -{ - struct mv643xx_private *mp = netdev_priv(netdev); - int port_num = mp->port_num; + if (cmd_sts & ETH_TX_FIRST_DESC) + dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE); + else + dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE); - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); - /* wait for previous write to complete */ - rdl(mp, INTERRUPT_MASK_REG(port_num)); + if (skb) + dev_kfree_skb_irq(skb); - mv643xx_eth_int_handler(netdev->irq, netdev); + released = 1; + } - wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); + return released; } -#endif -static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address, - int speed, int duplex, - struct ethtool_cmd *cmd) +static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev) { struct mv643xx_private *mp = netdev_priv(dev); - memset(cmd, 0, sizeof(*cmd)); - - cmd->port = PORT_MII; - cmd->transceiver = XCVR_INTERNAL; - cmd->phy_address = phy_address; - - if (speed == 0) { - cmd->autoneg = AUTONEG_ENABLE; - /* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */ - cmd->speed = SPEED_100; - cmd->advertising = ADVERTISED_10baseT_Half | - ADVERTISED_10baseT_Full | - ADVERTISED_100baseT_Half | - ADVERTISED_100baseT_Full; - if (mp->mii.supports_gmii) - cmd->advertising |= ADVERTISED_1000baseT_Full; - } else { - cmd->autoneg = AUTONEG_DISABLE; - cmd->speed = speed; - cmd->duplex = duplex; - } + if (mv643xx_eth_free_tx_descs(dev, 0) && + mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) + netif_wake_queue(dev); } -/*/ - * mv643xx_eth_probe - * - * First function called after registering the network device. - * It's purpose is to initialize the device as an ethernet device, - * fill the ethernet device structure with pointers * to functions, - * and set the MAC address of the interface - * - * Input : struct device * - * Output : -ENOMEM if failed , 0 if success - */ -static int mv643xx_eth_probe(struct platform_device *pdev) +static void mv643xx_eth_free_all_tx_descs(struct net_device *dev) { - struct mv643xx_eth_platform_data *pd; - int port_num; - struct mv643xx_private *mp; - struct net_device *dev; - u8 *p; - struct resource *res; - int err; - struct ethtool_cmd cmd; - int duplex = DUPLEX_HALF; - int speed = 0; /* default to auto-negotiation */ - DECLARE_MAC_BUF(mac); + mv643xx_eth_free_tx_descs(dev, 1); +} - pd = pdev->dev.platform_data; - if (pd == NULL) { - printk(KERN_ERR "No mv643xx_eth_platform_data\n"); - return -ENODEV; - } +static void mv643xx_eth_free_tx_rings(struct net_device *dev) +{ + struct mv643xx_private *mp = netdev_priv(dev); - if (pd->shared == NULL) { - printk(KERN_ERR "No mv643xx_eth_platform_data->shared\n"); - return -ENODEV; - } + /* Stop Tx Queues */ + mv643xx_eth_port_disable_tx(mp); - dev = alloc_etherdev(sizeof(struct mv643xx_private)); - if (!dev) - return -ENOMEM; + /* Free outstanding skb's on TX ring */ + mv643xx_eth_free_all_tx_descs(dev); - platform_set_drvdata(pdev, dev); + BUG_ON(mp->tx_used_desc_q != mp->tx_curr_desc_q); - mp = netdev_priv(dev); - mp->dev = dev; -#ifdef MV643XX_NAPI - netif_napi_add(dev, &mp->napi, mv643xx_poll, 64); -#endif + /* Free TX ring */ + if (mp->tx_sram_size) + iounmap(mp->p_tx_desc_area); + else + dma_free_coherent(NULL, mp->tx_desc_area_size, + mp->p_tx_desc_area, mp->tx_desc_dma); +} - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - BUG_ON(!res); - dev->irq = res->start; - dev->open = mv643xx_eth_open; - dev->stop = mv643xx_eth_stop; - dev->hard_start_xmit = mv643xx_eth_start_xmit; - dev->set_mac_address = mv643xx_eth_set_mac_address; - dev->set_multicast_list = mv643xx_eth_set_rx_mode; +/* netdev ops and related ***************************************************/ +static void eth_port_reset(struct mv643xx_private *mp); - /* No need to Tx Timeout */ - dev->tx_timeout = mv643xx_eth_tx_timeout; +/* Set the mv643xx port configuration register for the speed/duplex mode. */ +static void mv643xx_eth_update_pscr(struct net_device *dev, + struct ethtool_cmd *ecmd) +{ + struct mv643xx_private *mp = netdev_priv(dev); + int port_num = mp->port_num; + u32 o_pscr, n_pscr; + unsigned int queues; -#ifdef CONFIG_NET_POLL_CONTROLLER - dev->poll_controller = mv643xx_netpoll; -#endif + o_pscr = rdl(mp, PORT_SERIAL_CONTROL_REG(port_num)); + n_pscr = o_pscr; - dev->watchdog_timeo = 2 * HZ; - dev->base_addr = 0; - dev->change_mtu = mv643xx_eth_change_mtu; - dev->do_ioctl = mv643xx_eth_do_ioctl; - SET_ETHTOOL_OPS(dev, &mv643xx_ethtool_ops); + /* clear speed, duplex and rx buffer size fields */ + n_pscr &= ~(SET_MII_SPEED_TO_100 | + SET_GMII_SPEED_TO_1000 | + SET_FULL_DUPLEX_MODE | + MAX_RX_PACKET_MASK); -#ifdef MV643XX_CHECKSUM_OFFLOAD_TX -#ifdef MAX_SKB_FRAGS - /* - * Zero copy can only work if we use Discovery II memory. Else, we will - * have to map the buffers to ISA memory which is only 16 MB - */ - dev->features = NETIF_F_SG | NETIF_F_IP_CSUM; -#endif -#endif + if (ecmd->duplex == DUPLEX_FULL) + n_pscr |= SET_FULL_DUPLEX_MODE; - /* Configure the timeout task */ - INIT_WORK(&mp->tx_timeout_task, mv643xx_eth_tx_timeout_task); + if (ecmd->speed == SPEED_1000) + n_pscr |= SET_GMII_SPEED_TO_1000 | + MAX_RX_PACKET_9700BYTE; + else { + if (ecmd->speed == SPEED_100) + n_pscr |= SET_MII_SPEED_TO_100; + n_pscr |= MAX_RX_PACKET_1522BYTE; + } - spin_lock_init(&mp->lock); + if (n_pscr != o_pscr) { + if ((o_pscr & SERIAL_PORT_ENABLE) == 0) + wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); + else { + queues = mv643xx_eth_port_disable_tx(mp); - mp->shared = platform_get_drvdata(pd->shared); - port_num = mp->port_num = pd->port_number; + o_pscr &= ~SERIAL_PORT_ENABLE; + wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), o_pscr); + wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); + wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), n_pscr); + if (queues) + mv643xx_eth_port_enable_tx(mp, queues); + } + } +} - if (mp->shared->win_protect) - wrl(mp, WINDOW_PROTECT(port_num), mp->shared->win_protect); +/* + * mv643xx_eth_int_handler + * + * Main interrupt handler for the gigbit ethernet ports + * + * Input : irq - irq number (not used) + * dev_id - a pointer to the required interface's data structure + * regs - not used + * Output : N/A + */ - mp->shared_smi = mp->shared; - if (pd->shared_smi != NULL) - mp->shared_smi = platform_get_drvdata(pd->shared_smi); +static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *)dev_id; + struct mv643xx_private *mp = netdev_priv(dev); + u32 eth_int_cause, eth_int_cause_ext = 0; + unsigned int port_num = mp->port_num; - /* set default config values */ - eth_port_uc_addr_get(mp, dev->dev_addr); - mp->rx_ring_size = PORT_DEFAULT_RECEIVE_QUEUE_SIZE; - mp->tx_ring_size = PORT_DEFAULT_TRANSMIT_QUEUE_SIZE; + /* Read interrupt cause registers */ + eth_int_cause = rdl(mp, INTERRUPT_CAUSE_REG(port_num)) & + ETH_INT_UNMASK_ALL; + if (eth_int_cause & ETH_INT_CAUSE_EXT) { + eth_int_cause_ext = rdl(mp, + INTERRUPT_CAUSE_EXTEND_REG(port_num)) & + ETH_INT_UNMASK_ALL_EXT; + wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), + ~eth_int_cause_ext); + } - if (is_valid_ether_addr(pd->mac_addr)) - memcpy(dev->dev_addr, pd->mac_addr, 6); + /* PHY status changed */ + if (eth_int_cause_ext & (ETH_INT_CAUSE_PHY | ETH_INT_CAUSE_STATE)) { + struct ethtool_cmd cmd; - if (pd->phy_addr || pd->force_phy_addr) - ethernet_phy_set(mp, pd->phy_addr); + if (mii_link_ok(&mp->mii)) { + mii_ethtool_gset(&mp->mii, &cmd); + mv643xx_eth_update_pscr(dev, &cmd); + mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); + if (!netif_carrier_ok(dev)) { + netif_carrier_on(dev); + if (mp->tx_ring_size - mp->tx_desc_count >= + MAX_DESCS_PER_SKB) + netif_wake_queue(dev); + } + } else if (netif_carrier_ok(dev)) { + netif_stop_queue(dev); + netif_carrier_off(dev); + } + } - if (pd->rx_queue_size) - mp->rx_ring_size = pd->rx_queue_size; +#ifdef MV643XX_NAPI + if (eth_int_cause & ETH_INT_CAUSE_RX) { + /* schedule the NAPI poll routine to maintain port */ + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); - if (pd->tx_queue_size) - mp->tx_ring_size = pd->tx_queue_size; + /* wait for previous write to complete */ + rdl(mp, INTERRUPT_MASK_REG(port_num)); - if (pd->tx_sram_size) { - mp->tx_sram_size = pd->tx_sram_size; - mp->tx_sram_addr = pd->tx_sram_addr; + netif_rx_schedule(dev, &mp->napi); } - - if (pd->rx_sram_size) { - mp->rx_sram_size = pd->rx_sram_size; - mp->rx_sram_addr = pd->rx_sram_addr; - } - - duplex = pd->duplex; - speed = pd->speed; - - /* Hook up MII support for ethtool */ - mp->mii.dev = dev; - mp->mii.mdio_read = mv643xx_mdio_read; - mp->mii.mdio_write = mv643xx_mdio_write; - mp->mii.phy_id = ethernet_phy_get(mp); - mp->mii.phy_id_mask = 0x3f; - mp->mii.reg_num_mask = 0x1f; - - err = ethernet_phy_detect(mp); - if (err) { - pr_debug("%s: No PHY detected at addr %d\n", - dev->name, ethernet_phy_get(mp)); - goto out; - } - - ethernet_phy_reset(mp); - mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii); - mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd); - mv643xx_eth_update_pscr(dev, &cmd); - mv643xx_set_settings(dev, &cmd); - - SET_NETDEV_DEV(dev, &pdev->dev); - err = register_netdev(dev); - if (err) - goto out; - - p = dev->dev_addr; - printk(KERN_NOTICE - "%s: port %d with MAC address %s\n", - dev->name, port_num, print_mac(mac, p)); - - if (dev->features & NETIF_F_SG) - printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name); - - if (dev->features & NETIF_F_IP_CSUM) - printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n", - dev->name); - -#ifdef MV643XX_CHECKSUM_OFFLOAD_TX - printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name); -#endif - -#ifdef MV643XX_COAL - printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n", - dev->name); -#endif - -#ifdef MV643XX_NAPI - printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name); -#endif - - if (mp->tx_sram_size > 0) - printk(KERN_NOTICE "%s: Using SRAM\n", dev->name); - - return 0; - -out: - free_netdev(dev); - - return err; -} - -static int mv643xx_eth_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - - unregister_netdev(dev); - flush_scheduled_work(); - - free_netdev(dev); - platform_set_drvdata(pdev, NULL); - return 0; -} - -static void mv643xx_eth_conf_mbus_windows(struct mv643xx_shared_private *msp, - struct mbus_dram_target_info *dram) -{ - void __iomem *base = msp->eth_base; - u32 win_enable; - u32 win_protect; - int i; - - for (i = 0; i < 6; i++) { - writel(0, base + WINDOW_BASE(i)); - writel(0, base + WINDOW_SIZE(i)); - if (i < 4) - writel(0, base + WINDOW_REMAP_HIGH(i)); - } - - win_enable = 0x3f; - win_protect = 0; - - for (i = 0; i < dram->num_cs; i++) { - struct mbus_dram_window *cs = dram->cs + i; - - writel((cs->base & 0xffff0000) | - (cs->mbus_attr << 8) | - dram->mbus_dram_target_id, base + WINDOW_BASE(i)); - writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); - - win_enable &= ~(1 << i); - win_protect |= 3 << (2 * i); - } - - writel(win_enable, base + WINDOW_BAR_ENABLE); - msp->win_protect = win_protect; -} - -static int mv643xx_eth_shared_probe(struct platform_device *pdev) -{ - static int mv643xx_version_printed = 0; - struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data; - struct mv643xx_shared_private *msp; - struct resource *res; - int ret; - - if (!mv643xx_version_printed++) - printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n"); - - ret = -EINVAL; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) - goto out; - - ret = -ENOMEM; - msp = kmalloc(sizeof(*msp), GFP_KERNEL); - if (msp == NULL) - goto out; - memset(msp, 0, sizeof(*msp)); - - msp->eth_base = ioremap(res->start, res->end - res->start + 1); - if (msp->eth_base == NULL) - goto out_free; - - spin_lock_init(&msp->phy_lock); - msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000; - - platform_set_drvdata(pdev, msp); +#else + if (eth_int_cause & ETH_INT_CAUSE_RX) + mv643xx_eth_receive_queue(dev, INT_MAX); +#endif + if (eth_int_cause_ext & ETH_INT_CAUSE_TX) + mv643xx_eth_free_completed_tx_descs(dev); /* - * (Re-)program MBUS remapping windows if we are asked to. + * If no real interrupt occured, exit. + * This can happen when using gigE interrupt coalescing mechanism. */ - if (pd != NULL && pd->dram != NULL) - mv643xx_eth_conf_mbus_windows(msp, pd->dram); - - return 0; - -out_free: - kfree(msp); -out: - return ret; -} - -static int mv643xx_eth_shared_remove(struct platform_device *pdev) -{ - struct mv643xx_shared_private *msp = platform_get_drvdata(pdev); - - iounmap(msp->eth_base); - kfree(msp); - - return 0; -} - -static void mv643xx_eth_shutdown(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - struct mv643xx_private *mp = netdev_priv(dev); - unsigned int port_num = mp->port_num; - - /* Mask all interrupts on ethernet port */ - wrl(mp, INTERRUPT_MASK_REG(port_num), 0); - rdl(mp, INTERRUPT_MASK_REG(port_num)); - - eth_port_reset(mp); -} - -static struct platform_driver mv643xx_eth_driver = { - .probe = mv643xx_eth_probe, - .remove = mv643xx_eth_remove, - .shutdown = mv643xx_eth_shutdown, - .driver = { - .name = MV643XX_ETH_NAME, - .owner = THIS_MODULE, - }, -}; - -static struct platform_driver mv643xx_eth_shared_driver = { - .probe = mv643xx_eth_shared_probe, - .remove = mv643xx_eth_shared_remove, - .driver = { - .name = MV643XX_ETH_SHARED_NAME, - .owner = THIS_MODULE, - }, -}; - -/* - * mv643xx_init_module - * - * Registers the network drivers into the Linux kernel - * - * Input : N/A - * - * Output : N/A - */ -static int __init mv643xx_init_module(void) -{ - int rc; - - rc = platform_driver_register(&mv643xx_eth_shared_driver); - if (!rc) { - rc = platform_driver_register(&mv643xx_eth_driver); - if (rc) - platform_driver_unregister(&mv643xx_eth_shared_driver); - } - return rc; -} + if ((eth_int_cause == 0x0) && (eth_int_cause_ext == 0x0)) + return IRQ_NONE; -/* - * mv643xx_cleanup_module - * - * Registers the network drivers into the Linux kernel - * - * Input : N/A - * - * Output : N/A - */ -static void __exit mv643xx_cleanup_module(void) -{ - platform_driver_unregister(&mv643xx_eth_driver); - platform_driver_unregister(&mv643xx_eth_shared_driver); + return IRQ_HANDLED; } -module_init(mv643xx_init_module); -module_exit(mv643xx_cleanup_module); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani" - " and Dale Farnsworth"); -MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); -MODULE_ALIAS("platform:" MV643XX_ETH_NAME); -MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); - -/* - * The second part is the low level driver of the gigE ethernet ports. - */ - -/* - * Marvell's Gigabit Ethernet controller low level driver - * - * DESCRIPTION: - * This file introduce low level API to Marvell's Gigabit Ethernet - * controller. This Gigabit Ethernet Controller driver API controls - * 1) Operations (i.e. port init, start, reset etc'). - * 2) Data flow (i.e. port send, receive etc'). - * Each Gigabit Ethernet port is controlled via - * struct mv643xx_private. - * This struct includes user configuration information as well as - * driver internal data needed for its operations. - * - * Supported Features: - * - This low level driver is OS independent. Allocating memory for - * the descriptor rings and buffers are not within the scope of - * this driver. - * - The user is free from Rx/Tx queue managing. - * - This low level driver introduce functionality API that enable - * the to operate Marvell's Gigabit Ethernet Controller in a - * convenient way. - * - Simple Gigabit Ethernet port operation API. - * - Simple Gigabit Ethernet port data flow API. - * - Data flow and operation API support per queue functionality. - * - Support cached descriptors for better performance. - * - Enable access to all four DRAM banks and internal SRAM memory - * spaces. - * - PHY access and control API. - * - Port control register configuration API. - * - Full control over Unicast and Multicast MAC configurations. - * - * Operation flow: - * - * Initialization phase - * This phase complete the initialization of the the - * mv643xx_private struct. - * User information regarding port configuration has to be set - * prior to calling the port initialization routine. - * - * In this phase any port Tx/Rx activity is halted, MIB counters - * are cleared, PHY address is set according to user parameter and - * access to DRAM and internal SRAM memory spaces. - * - * Driver ring initialization - * Allocating memory for the descriptor rings and buffers is not - * within the scope of this driver. Thus, the user is required to - * allocate memory for the descriptors ring and buffers. Those - * memory parameters are used by the Rx and Tx ring initialization - * routines in order to curve the descriptor linked list in a form - * of a ring. - * Note: Pay special attention to alignment issues when using - * cached descriptors/buffers. In this phase the driver store - * information in the mv643xx_private struct regarding each queue - * ring. - * - * Driver start - * This phase prepares the Ethernet port for Rx and Tx activity. - * It uses the information stored in the mv643xx_private struct to - * initialize the various port registers. - * - * Data flow: - * All packet references to/from the driver are done using - * struct pkt_info. - * This struct is a unified struct used with Rx and Tx operations. - * This way the user is not required to be familiar with neither - * Tx nor Rx descriptors structures. - * The driver's descriptors rings are management by indexes. - * Those indexes controls the ring resources and used to indicate - * a SW resource error: - * 'current' - * This index points to the current available resource for use. For - * example in Rx process this index will point to the descriptor - * that will be passed to the user upon calling the receive - * routine. In Tx process, this index will point to the descriptor - * that will be assigned with the user packet info and transmitted. - * 'used' - * This index points to the descriptor that need to restore its - * resources. For example in Rx process, using the Rx buffer return - * API will attach the buffer returned in packet info to the - * descriptor pointed by 'used'. In Tx process, using the Tx - * descriptor return will merely return the user packet info with - * the command status of the transmitted buffer pointed by the - * 'used' index. Nevertheless, it is essential to use this routine - * to update the 'used' index. - * 'first' - * This index supports Tx Scatter-Gather. It points to the first - * descriptor of a packet assembled of multiple buffers. For - * example when in middle of Such packet we have a Tx resource - * error the 'curr' index get the value of 'first' to indicate - * that the ring returned to its state before trying to transmit - * this packet. - * - * Receive operation: - * The eth_port_receive API set the packet information struct, - * passed by the caller, with received information from the - * 'current' SDMA descriptor. - * It is the user responsibility to return this resource back - * to the Rx descriptor ring to enable the reuse of this source. - * Return Rx resource is done using the eth_rx_return_buff API. - * - * Prior to calling the initialization routine eth_port_init() the user - * must set the following fields under mv643xx_private struct: - * port_num User Ethernet port number. - * port_config User port configuration value. - * port_config_extend User port config extend value. - * port_sdma_config User port SDMA config value. - * port_serial_control User port serial control value. - * - * This driver data flow is done using the struct pkt_info which - * is a unified struct for Rx and Tx operations: - * - * byte_cnt Tx/Rx descriptor buffer byte count. - * l4i_chk CPU provided TCP Checksum. For Tx operation - * only. - * cmd_sts Tx/Rx descriptor command status. - * buf_ptr Tx/Rx descriptor buffer pointer. - * return_info Tx/Rx user resource return information. - */ - -/* Ethernet Port routines */ -static void eth_port_set_filter_table_entry(struct mv643xx_private *mp, - int table, unsigned char entry); - /* - * eth_port_init - Initialize the Ethernet port driver + * ethernet_phy_reset - Reset Ethernet port PHY. * * DESCRIPTION: - * This function prepares the ethernet port to start its activity: - * 1) Completes the ethernet port driver struct initialization toward port - * start routine. - * 2) Resets the device to a quiescent state in case of warm reboot. - * 3) Enable SDMA access to all four DRAM banks as well as internal SRAM. - * 4) Clean MAC tables. The reset status of those tables is unknown. - * 5) Set PHY address. - * Note: Call this routine prior to eth_port_start routine and after - * setting user values in the user fields of Ethernet port control - * struct. + * This routine utilizes the SMI interface to reset the ethernet port PHY. * * INPUT: - * struct mv643xx_private *mp Ethernet port control struct + * struct mv643xx_private *mp Ethernet Port. * * OUTPUT: - * See description. + * The PHY is reset. * * RETURN: * None. + * */ -static void eth_port_init(struct mv643xx_private *mp) +static void ethernet_phy_reset(struct mv643xx_private *mp) { - mp->rx_resource_err = 0; + unsigned int phy_reg_data; - eth_port_reset(mp); + /* Reset the PHY */ + eth_port_read_smi_reg(mp, 0, &phy_reg_data); + phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */ + eth_port_write_smi_reg(mp, 0, phy_reg_data); - eth_port_init_mac_tables(mp); + /* wait for PHY to come out of reset */ + do { + udelay(1); + eth_port_read_smi_reg(mp, 0, &phy_reg_data); + } while (phy_reg_data & 0x8000); } /* @@ -2423,943 +2290,930 @@ static void eth_port_start(struct net_device *dev) mv643xx_set_settings(dev, ðtool_cmd); } +#ifdef MV643XX_COAL + /* - * eth_port_uc_addr_set - Write a MAC address into the port's hw registers + * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path + * + * DESCRIPTION: + * This routine sets the RX coalescing interrupt mechanism parameter. + * This parameter is a timeout counter, that counts in 64 t_clk + * chunks ; that when timeout event occurs a maskable interrupt + * occurs. + * The parameter is calculated using the tClk of the MV-643xx chip + * , and the required delay of the interrupt in usec. + * + * INPUT: + * struct mv643xx_private *mp Ethernet port + * unsigned int delay Delay in usec + * + * OUTPUT: + * Interrupt coalescing mechanism value is set in MV-643xx chip. + * + * RETURN: + * The interrupt coalescing value set in the gigE port. + * */ -static void eth_port_uc_addr_set(struct mv643xx_private *mp, - unsigned char *p_addr) +static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp, + unsigned int delay) { unsigned int port_num = mp->port_num; - unsigned int mac_h; - unsigned int mac_l; - int table; - - mac_l = (p_addr[4] << 8) | (p_addr[5]); - mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) | - (p_addr[3] << 0); + unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; - wrl(mp, MAC_ADDR_LOW(port_num), mac_l); - wrl(mp, MAC_ADDR_HIGH(port_num), mac_h); + /* Set RX Coalescing mechanism */ + wrl(mp, SDMA_CONFIG_REG(port_num), + ((coal & 0x3fff) << 8) | + (rdl(mp, SDMA_CONFIG_REG(port_num)) + & 0xffc000ff)); - /* Accept frames with this address */ - table = DA_FILTER_UNICAST_TABLE_BASE(port_num); - eth_port_set_filter_table_entry(mp, table, p_addr[5] & 0x0f); + return coal; } +#endif /* - * eth_port_uc_addr_get - Read the MAC address from the port's hw registers + * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path + * + * DESCRIPTION: + * This routine sets the TX coalescing interrupt mechanism parameter. + * This parameter is a timeout counter, that counts in 64 t_clk + * chunks ; that when timeout event occurs a maskable interrupt + * occurs. + * The parameter is calculated using the t_cLK frequency of the + * MV-643xx chip and the required delay in the interrupt in uSec + * + * INPUT: + * struct mv643xx_private *mp Ethernet port + * unsigned int delay Delay in uSeconds + * + * OUTPUT: + * Interrupt coalescing mechanism value is set in MV-643xx chip. + * + * RETURN: + * The interrupt coalescing value set in the gigE port. + * */ -static void eth_port_uc_addr_get(struct mv643xx_private *mp, - unsigned char *p_addr) +static unsigned int eth_port_set_tx_coal(struct mv643xx_private *mp, + unsigned int delay) { - unsigned int port_num = mp->port_num; - unsigned int mac_h; - unsigned int mac_l; + unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; - mac_h = rdl(mp, MAC_ADDR_HIGH(port_num)); - mac_l = rdl(mp, MAC_ADDR_LOW(port_num)); + /* Set TX Coalescing mechanism */ + wrl(mp, TX_FIFO_URGENT_THRESHOLD_REG(mp->port_num), coal << 4); - p_addr[0] = (mac_h >> 24) & 0xff; - p_addr[1] = (mac_h >> 16) & 0xff; - p_addr[2] = (mac_h >> 8) & 0xff; - p_addr[3] = mac_h & 0xff; - p_addr[4] = (mac_l >> 8) & 0xff; - p_addr[5] = mac_l & 0xff; + return coal; } /* - * The entries in each table are indexed by a hash of a packet's MAC - * address. One bit in each entry determines whether the packet is - * accepted. There are 4 entries (each 8 bits wide) in each register - * of the table. The bits in each entry are defined as follows: - * 0 Accept=1, Drop=0 - * 3-1 Queue (ETH_Q0=0) - * 7-4 Reserved = 0; + * eth_port_init - Initialize the Ethernet port driver + * + * DESCRIPTION: + * This function prepares the ethernet port to start its activity: + * 1) Completes the ethernet port driver struct initialization toward port + * start routine. + * 2) Resets the device to a quiescent state in case of warm reboot. + * 3) Enable SDMA access to all four DRAM banks as well as internal SRAM. + * 4) Clean MAC tables. The reset status of those tables is unknown. + * 5) Set PHY address. + * Note: Call this routine prior to eth_port_start routine and after + * setting user values in the user fields of Ethernet port control + * struct. + * + * INPUT: + * struct mv643xx_private *mp Ethernet port control struct + * + * OUTPUT: + * See description. + * + * RETURN: + * None. */ -static void eth_port_set_filter_table_entry(struct mv643xx_private *mp, - int table, unsigned char entry) +static void eth_port_init(struct mv643xx_private *mp) { - unsigned int table_reg; - unsigned int tbl_offset; - unsigned int reg_offset; + mp->rx_resource_err = 0; - tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */ - reg_offset = entry % 4; /* Entry offset within the register */ + eth_port_reset(mp); - /* Set "accepts frame bit" at specified table entry */ - table_reg = rdl(mp, table + tbl_offset); - table_reg |= 0x01 << (8 * reg_offset); - wrl(mp, table + tbl_offset, table_reg); + eth_port_init_mac_tables(mp); } /* - * eth_port_mc_addr - Multicast address settings. + * mv643xx_eth_open * - * The MV device supports multicast using two tables: - * 1) Special Multicast Table for MAC addresses of the form - * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF). - * The MAC DA[7:0] bits are used as a pointer to the Special Multicast - * Table entries in the DA-Filter table. - * 2) Other Multicast Table for multicast of another type. A CRC-8bit - * is used as an index to the Other Multicast Table entries in the - * DA-Filter table. This function calculates the CRC-8bit value. - * In either case, eth_port_set_filter_table_entry() is then called - * to set to set the actual table entry. + * This function is called when openning the network device. The function + * should initialize all the hardware, initialize cyclic Rx/Tx + * descriptors chain and buffers and allocate an IRQ to the network + * device. + * + * Input : a pointer to the network device structure + * + * Output : zero of success , nonzero if fails. */ -static void eth_port_mc_addr(struct mv643xx_private *mp, unsigned char *p_addr) + +static int mv643xx_eth_open(struct net_device *dev) { + struct mv643xx_private *mp = netdev_priv(dev); unsigned int port_num = mp->port_num; - unsigned int mac_h; - unsigned int mac_l; - unsigned char crc_result = 0; - int table; - int mac_array[48]; - int crc[8]; - int i; + unsigned int size; + int err; - if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) && - (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) { - table = DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(port_num); - eth_port_set_filter_table_entry(mp, table, p_addr[5]); - return; + /* Clear any pending ethernet port interrupts */ + wrl(mp, INTERRUPT_CAUSE_REG(port_num), 0); + wrl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); + /* wait for previous write to complete */ + rdl(mp, INTERRUPT_CAUSE_EXTEND_REG(port_num)); + + err = request_irq(dev->irq, mv643xx_eth_int_handler, + IRQF_SHARED | IRQF_SAMPLE_RANDOM, dev->name, dev); + if (err) { + printk(KERN_ERR "%s: Can not assign IRQ\n", dev->name); + return -EAGAIN; } - /* Calculate CRC-8 out of the given address */ - mac_h = (p_addr[0] << 8) | (p_addr[1]); - mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) | - (p_addr[4] << 8) | (p_addr[5] << 0); + eth_port_init(mp); - for (i = 0; i < 32; i++) - mac_array[i] = (mac_l >> i) & 0x1; - for (i = 32; i < 48; i++) - mac_array[i] = (mac_h >> (i - 32)) & 0x1; + memset(&mp->timeout, 0, sizeof(struct timer_list)); + mp->timeout.function = mv643xx_eth_rx_refill_descs_timer_wrapper; + mp->timeout.data = (unsigned long)dev; - crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^ - mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^ - mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^ - mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^ - mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0]; + /* Allocate RX and TX skb rings */ + mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size, + GFP_KERNEL); + if (!mp->rx_skb) { + printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name); + err = -ENOMEM; + goto out_free_irq; + } + mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size, + GFP_KERNEL); + if (!mp->tx_skb) { + printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name); + err = -ENOMEM; + goto out_free_rx_skb; + } - crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ - mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^ - mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^ - mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^ - mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^ - mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^ - mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0]; + /* Allocate TX ring */ + mp->tx_desc_count = 0; + size = mp->tx_ring_size * sizeof(struct eth_tx_desc); + mp->tx_desc_area_size = size; - crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^ - mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^ - mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^ - mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^ - mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ - mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0]; + if (mp->tx_sram_size) { + mp->p_tx_desc_area = ioremap(mp->tx_sram_addr, + mp->tx_sram_size); + mp->tx_desc_dma = mp->tx_sram_addr; + } else + mp->p_tx_desc_area = dma_alloc_coherent(NULL, size, + &mp->tx_desc_dma, + GFP_KERNEL); - crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ - mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^ - mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^ - mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ - mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^ - mac_array[3] ^ mac_array[2] ^ mac_array[1]; + if (!mp->p_tx_desc_area) { + printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", + dev->name, size); + err = -ENOMEM; + goto out_free_tx_skb; + } + BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */ + memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size); - crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^ - mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^ - mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^ - mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^ - mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^ - mac_array[3] ^ mac_array[2]; + ether_init_tx_desc_ring(mp); - crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^ - mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^ - mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^ - mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^ - mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^ - mac_array[4] ^ mac_array[3]; + /* Allocate RX ring */ + mp->rx_desc_count = 0; + size = mp->rx_ring_size * sizeof(struct eth_rx_desc); + mp->rx_desc_area_size = size; - crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^ - mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^ - mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^ - mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^ - mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^ - mac_array[4]; + if (mp->rx_sram_size) { + mp->p_rx_desc_area = ioremap(mp->rx_sram_addr, + mp->rx_sram_size); + mp->rx_desc_dma = mp->rx_sram_addr; + } else + mp->p_rx_desc_area = dma_alloc_coherent(NULL, size, + &mp->rx_desc_dma, + GFP_KERNEL); - crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^ - mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^ - mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^ - mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^ - mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5]; + if (!mp->p_rx_desc_area) { + printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n", + dev->name, size); + printk(KERN_ERR "%s: Freeing previously allocated TX queues...", + dev->name); + if (mp->rx_sram_size) + iounmap(mp->p_tx_desc_area); + else + dma_free_coherent(NULL, mp->tx_desc_area_size, + mp->p_tx_desc_area, mp->tx_desc_dma); + err = -ENOMEM; + goto out_free_tx_skb; + } + memset((void *)mp->p_rx_desc_area, 0, size); - for (i = 0; i < 8; i++) - crc_result = crc_result | (crc[i] << i); + ether_init_rx_desc_ring(mp); - table = DA_FILTER_OTHER_MULTICAST_TABLE_BASE(port_num); - eth_port_set_filter_table_entry(mp, table, crc_result); -} + mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */ -/* - * Set the entire multicast list based on dev->mc_list. - */ -static void eth_port_set_multicast_list(struct net_device *dev) -{ +#ifdef MV643XX_NAPI + napi_enable(&mp->napi); +#endif - struct dev_mc_list *mc_list; - int i; - int table_index; - struct mv643xx_private *mp = netdev_priv(dev); - unsigned int eth_port_num = mp->port_num; + eth_port_start(dev); - /* If the device is in promiscuous mode or in all multicast mode, - * we will fully populate both multicast tables with accept. - * This is guaranteed to yield a match on all multicast addresses... - */ - if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) { - for (table_index = 0; table_index <= 0xFC; table_index += 4) { - /* Set all entries in DA filter special multicast - * table (Ex_dFSMT) - * Set for ETH_Q0 for now - * Bits - * 0 Accept=1, Drop=0 - * 3-1 Queue ETH_Q0=0 - * 7-4 Reserved = 0; - */ - wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); + /* Interrupt Coalescing */ - /* Set all entries in DA filter other multicast - * table (Ex_dFOMT) - * Set for ETH_Q0 for now - * Bits - * 0 Accept=1, Drop=0 - * 3-1 Queue ETH_Q0=0 - * 7-4 Reserved = 0; - */ - wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); - } - return; - } +#ifdef MV643XX_COAL + mp->rx_int_coal = + eth_port_set_rx_coal(mp, MV643XX_RX_COAL); +#endif + + mp->tx_int_coal = + eth_port_set_tx_coal(mp, MV643XX_TX_COAL); - /* We will clear out multicast tables every time we get the list. - * Then add the entire new list... - */ - for (table_index = 0; table_index <= 0xFC; table_index += 4) { - /* Clear DA filter special multicast table (Ex_dFSMT) */ - wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE - (eth_port_num) + table_index, 0); + /* Unmask phy and link status changes interrupts */ + wrl(mp, INTERRUPT_EXTEND_MASK_REG(port_num), ETH_INT_UNMASK_ALL_EXT); - /* Clear DA filter other multicast table (Ex_dFOMT) */ - wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE - (eth_port_num) + table_index, 0); - } + /* Unmask RX buffer and TX end interrupt */ + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); - /* Get pointer to net_device multicast list and add each one... */ - for (i = 0, mc_list = dev->mc_list; - (i < 256) && (mc_list != NULL) && (i < dev->mc_count); - i++, mc_list = mc_list->next) - if (mc_list->dmi_addrlen == 6) - eth_port_mc_addr(mp, mc_list->dmi_addr); + return 0; + +out_free_tx_skb: + kfree(mp->tx_skb); +out_free_rx_skb: + kfree(mp->rx_skb); +out_free_irq: + free_irq(dev->irq, dev); + + return err; } /* - * eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables + * eth_port_reset - Reset Ethernet port * * DESCRIPTION: - * Go through all the DA filter tables (Unicast, Special Multicast & - * Other Multicast) and set each entry to 0. + * This routine resets the chip by aborting any SDMA engine activity and + * clearing the MIB counters. The Receiver and the Transmit unit are in + * idle state after this command is performed and the port is disabled. * * INPUT: * struct mv643xx_private *mp Ethernet Port. * * OUTPUT: - * Multicast and Unicast packets are rejected. + * Channel activity is halted. * * RETURN: * None. + * */ -static void eth_port_init_mac_tables(struct mv643xx_private *mp) +static void eth_port_reset(struct mv643xx_private *mp) { unsigned int port_num = mp->port_num; - int table_index; + unsigned int reg_data; - /* Clear DA filter unicast table (Ex_dFUT) */ - for (table_index = 0; table_index <= 0xC; table_index += 4) - wrl(mp, DA_FILTER_UNICAST_TABLE_BASE(port_num) + - table_index, 0); + mv643xx_eth_port_disable_tx(mp); + mv643xx_eth_port_disable_rx(mp); - for (table_index = 0; table_index <= 0xFC; table_index += 4) { - /* Clear DA filter special multicast table (Ex_dFSMT) */ - wrl(mp, DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(port_num) + - table_index, 0); - /* Clear DA filter other multicast table (Ex_dFOMT) */ - wrl(mp, DA_FILTER_OTHER_MULTICAST_TABLE_BASE(port_num) + - table_index, 0); - } + /* Clear all MIB counters */ + eth_clear_mib_counters(mp); + + /* Reset the Enable bit in the Configuration Register */ + reg_data = rdl(mp, PORT_SERIAL_CONTROL_REG(port_num)); + reg_data &= ~(SERIAL_PORT_ENABLE | + DO_NOT_FORCE_LINK_FAIL | + FORCE_LINK_PASS); + wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), reg_data); } /* - * eth_clear_mib_counters - Clear all MIB counters - * - * DESCRIPTION: - * This function clears all MIB counters of a specific ethernet port. - * A read from the MIB counter will reset the counter. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port. - * - * OUTPUT: - * After reading all MIB counters, the counters resets. - * - * RETURN: - * MIB counter value. + * mv643xx_eth_stop * + * This function is used when closing the network device. + * It updates the hardware, + * release all memory that holds buffers and descriptors and release the IRQ. + * Input : a pointer to the device structure + * Output : zero if success , nonzero if fails */ -static void eth_clear_mib_counters(struct mv643xx_private *mp) + +static int mv643xx_eth_stop(struct net_device *dev) { + struct mv643xx_private *mp = netdev_priv(dev); unsigned int port_num = mp->port_num; - int i; - - /* Perform dummy reads from MIB counters */ - for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION; - i += 4) - rdl(mp, MIB_COUNTERS_BASE(port_num) + i); -} -static inline u32 read_mib(struct mv643xx_private *mp, int offset) -{ - return rdl(mp, MIB_COUNTERS_BASE(mp->port_num) + offset); -} + /* Mask all interrupts on ethernet port */ + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); + /* wait for previous write to complete */ + rdl(mp, INTERRUPT_MASK_REG(port_num)); -static void eth_update_mib_counters(struct mv643xx_private *mp) -{ - struct mv643xx_mib_counters *p = &mp->mib_counters; - int offset; +#ifdef MV643XX_NAPI + napi_disable(&mp->napi); +#endif + netif_carrier_off(dev); + netif_stop_queue(dev); - p->good_octets_received += - read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW); - p->good_octets_received += - (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32; + eth_port_reset(mp); - for (offset = ETH_MIB_BAD_OCTETS_RECEIVED; - offset <= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS; - offset += 4) - *(u32 *)((char *)p + offset) += read_mib(mp, offset); + mv643xx_eth_free_tx_rings(dev); + mv643xx_eth_free_rx_rings(dev); - p->good_octets_sent += read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_LOW); - p->good_octets_sent += - (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_HIGH) << 32; + free_irq(dev->irq, dev); - for (offset = ETH_MIB_GOOD_FRAMES_SENT; - offset <= ETH_MIB_LATE_COLLISION; - offset += 4) - *(u32 *)((char *)p + offset) += read_mib(mp, offset); + return 0; } -/* - * ethernet_phy_detect - Detect whether a phy is present - * - * DESCRIPTION: - * This function tests whether there is a PHY present on - * the specified port. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port. - * - * OUTPUT: - * None - * - * RETURN: - * 0 on success - * -ENODEV on failure - * - */ -static int ethernet_phy_detect(struct mv643xx_private *mp) +static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { - unsigned int phy_reg_data0; - int auto_neg; - - eth_port_read_smi_reg(mp, 0, &phy_reg_data0); - auto_neg = phy_reg_data0 & 0x1000; - phy_reg_data0 ^= 0x1000; /* invert auto_neg */ - eth_port_write_smi_reg(mp, 0, phy_reg_data0); - - eth_port_read_smi_reg(mp, 0, &phy_reg_data0); - if ((phy_reg_data0 & 0x1000) == auto_neg) - return -ENODEV; /* change didn't take */ + struct mv643xx_private *mp = netdev_priv(dev); - phy_reg_data0 ^= 0x1000; - eth_port_write_smi_reg(mp, 0, phy_reg_data0); - return 0; + return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL); } /* - * ethernet_phy_get - Get the ethernet port PHY address. - * - * DESCRIPTION: - * This routine returns the given ethernet port PHY address. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port. - * - * OUTPUT: - * None. - * - * RETURN: - * PHY address. + * Changes MTU (maximum transfer unit) of the gigabit ethenret port * + * Input : pointer to ethernet interface network device structure + * new mtu size + * Output : 0 upon success, -EINVAL upon failure */ -static int ethernet_phy_get(struct mv643xx_private *mp) +static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) { - unsigned int reg_data; + if ((new_mtu > 9500) || (new_mtu < 64)) + return -EINVAL; - reg_data = rdl(mp, PHY_ADDR_REG); + dev->mtu = new_mtu; + if (!netif_running(dev)) + return 0; - return ((reg_data >> (5 * mp->port_num)) & 0x1f); + /* + * Stop and then re-open the interface. This will allocate RX + * skbs of the new MTU. + * There is a possible danger that the open will not succeed, + * due to memory being full, which might fail the open function. + */ + mv643xx_eth_stop(dev); + if (mv643xx_eth_open(dev)) { + printk(KERN_ERR "%s: Fatal error on opening device\n", + dev->name); + } + + return 0; } /* - * ethernet_phy_set - Set the ethernet port PHY address. - * - * DESCRIPTION: - * This routine sets the given ethernet port PHY address. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port. - * int phy_addr PHY address. - * - * OUTPUT: - * None. - * - * RETURN: - * None. + * mv643xx_eth_tx_timeout_task * + * Actual routine to reset the adapter when a timeout on Tx has occurred */ -static void ethernet_phy_set(struct mv643xx_private *mp, int phy_addr) +static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly) { - u32 reg_data; - int addr_shift = 5 * mp->port_num; + struct mv643xx_private *mp = container_of(ugly, struct mv643xx_private, + tx_timeout_task); + struct net_device *dev = mp->dev; - reg_data = rdl(mp, PHY_ADDR_REG); - reg_data &= ~(0x1f << addr_shift); - reg_data |= (phy_addr & 0x1f) << addr_shift; - wrl(mp, PHY_ADDR_REG, reg_data); -} + if (!netif_running(dev)) + return; -/* - * ethernet_phy_reset - Reset Ethernet port PHY. - * - * DESCRIPTION: - * This routine utilizes the SMI interface to reset the ethernet port PHY. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port. - * - * OUTPUT: - * The PHY is reset. + netif_stop_queue(dev); + + eth_port_reset(mp); + eth_port_start(dev); + + if (mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) + netif_wake_queue(dev); +} + +/* + * mv643xx_eth_tx_timeout * - * RETURN: - * None. + * Called upon a timeout on transmitting a packet * + * Input : pointer to ethernet interface network device structure. + * Output : N/A */ -static void ethernet_phy_reset(struct mv643xx_private *mp) +static void mv643xx_eth_tx_timeout(struct net_device *dev) { - unsigned int phy_reg_data; + struct mv643xx_private *mp = netdev_priv(dev); - /* Reset the PHY */ - eth_port_read_smi_reg(mp, 0, &phy_reg_data); - phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */ - eth_port_write_smi_reg(mp, 0, phy_reg_data); + printk(KERN_INFO "%s: TX timeout ", dev->name); - /* wait for PHY to come out of reset */ - do { - udelay(1); - eth_port_read_smi_reg(mp, 0, &phy_reg_data); - } while (phy_reg_data & 0x8000); + /* Do the reset outside of interrupt context */ + schedule_work(&mp->tx_timeout_task); } -static void mv643xx_eth_port_enable_tx(struct mv643xx_private *mp, - unsigned int queues) +#ifdef CONFIG_NET_POLL_CONTROLLER +static void mv643xx_netpoll(struct net_device *netdev) { - wrl(mp, TRANSMIT_QUEUE_COMMAND_REG(mp->port_num), queues); + struct mv643xx_private *mp = netdev_priv(netdev); + int port_num = mp->port_num; + + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL); + /* wait for previous write to complete */ + rdl(mp, INTERRUPT_MASK_REG(port_num)); + + mv643xx_eth_int_handler(netdev->irq, netdev); + + wrl(mp, INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL); } +#endif -static void mv643xx_eth_port_enable_rx(struct mv643xx_private *mp, - unsigned int queues) +/* + * Wrappers for MII support library. + */ +static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location) { - wrl(mp, RECEIVE_QUEUE_COMMAND_REG(mp->port_num), queues); + struct mv643xx_private *mp = netdev_priv(dev); + int val; + + eth_port_read_smi_reg(mp, location, &val); + return val; } -static unsigned int mv643xx_eth_port_disable_tx(struct mv643xx_private *mp) +static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val) { - unsigned int port_num = mp->port_num; - u32 queues; + struct mv643xx_private *mp = netdev_priv(dev); + eth_port_write_smi_reg(mp, location, val); +} - /* Stop Tx port activity. Check port Tx activity. */ - queues = rdl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num)) & 0xFF; - if (queues) { - /* Issue stop command for active queues only */ - wrl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num), (queues << 8)); - /* Wait for all Tx activity to terminate. */ - /* Check port cause register that all Tx queues are stopped */ - while (rdl(mp, TRANSMIT_QUEUE_COMMAND_REG(port_num)) & 0xFF) - udelay(PHY_WAIT_MICRO_SECONDS); +/* platform glue ************************************************************/ +static void mv643xx_eth_conf_mbus_windows(struct mv643xx_shared_private *msp, + struct mbus_dram_target_info *dram) +{ + void __iomem *base = msp->eth_base; + u32 win_enable; + u32 win_protect; + int i; - /* Wait for Tx FIFO to empty */ - while (rdl(mp, PORT_STATUS_REG(port_num)) & - ETH_PORT_TX_FIFO_EMPTY) - udelay(PHY_WAIT_MICRO_SECONDS); + for (i = 0; i < 6; i++) { + writel(0, base + WINDOW_BASE(i)); + writel(0, base + WINDOW_SIZE(i)); + if (i < 4) + writel(0, base + WINDOW_REMAP_HIGH(i)); } - return queues; + win_enable = 0x3f; + win_protect = 0; + + for (i = 0; i < dram->num_cs; i++) { + struct mbus_dram_window *cs = dram->cs + i; + + writel((cs->base & 0xffff0000) | + (cs->mbus_attr << 8) | + dram->mbus_dram_target_id, base + WINDOW_BASE(i)); + writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); + + win_enable &= ~(1 << i); + win_protect |= 3 << (2 * i); + } + + writel(win_enable, base + WINDOW_BAR_ENABLE); + msp->win_protect = win_protect; } -static unsigned int mv643xx_eth_port_disable_rx(struct mv643xx_private *mp) +static int mv643xx_eth_shared_probe(struct platform_device *pdev) { - unsigned int port_num = mp->port_num; - u32 queues; + static int mv643xx_version_printed = 0; + struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data; + struct mv643xx_shared_private *msp; + struct resource *res; + int ret; - /* Stop Rx port activity. Check port Rx activity. */ - queues = rdl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num)) & 0xFF; - if (queues) { - /* Issue stop command for active queues only */ - wrl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num), (queues << 8)); + if (!mv643xx_version_printed++) + printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n"); - /* Wait for all Rx activity to terminate. */ - /* Check port cause register that all Rx queues are stopped */ - while (rdl(mp, RECEIVE_QUEUE_COMMAND_REG(port_num)) & 0xFF) - udelay(PHY_WAIT_MICRO_SECONDS); - } + ret = -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) + goto out; - return queues; + ret = -ENOMEM; + msp = kmalloc(sizeof(*msp), GFP_KERNEL); + if (msp == NULL) + goto out; + memset(msp, 0, sizeof(*msp)); + + msp->eth_base = ioremap(res->start, res->end - res->start + 1); + if (msp->eth_base == NULL) + goto out_free; + + spin_lock_init(&msp->phy_lock); + msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000; + + platform_set_drvdata(pdev, msp); + + /* + * (Re-)program MBUS remapping windows if we are asked to. + */ + if (pd != NULL && pd->dram != NULL) + mv643xx_eth_conf_mbus_windows(msp, pd->dram); + + return 0; + +out_free: + kfree(msp); +out: + return ret; +} + +static int mv643xx_eth_shared_remove(struct platform_device *pdev) +{ + struct mv643xx_shared_private *msp = platform_get_drvdata(pdev); + + iounmap(msp->eth_base); + kfree(msp); + + return 0; } +static struct platform_driver mv643xx_eth_shared_driver = { + .probe = mv643xx_eth_shared_probe, + .remove = mv643xx_eth_shared_remove, + .driver = { + .name = MV643XX_ETH_SHARED_NAME, + .owner = THIS_MODULE, + }, +}; + /* - * eth_port_reset - Reset Ethernet port + * ethernet_phy_set - Set the ethernet port PHY address. * * DESCRIPTION: - * This routine resets the chip by aborting any SDMA engine activity and - * clearing the MIB counters. The Receiver and the Transmit unit are in - * idle state after this command is performed and the port is disabled. + * This routine sets the given ethernet port PHY address. * * INPUT: * struct mv643xx_private *mp Ethernet Port. + * int phy_addr PHY address. * * OUTPUT: - * Channel activity is halted. + * None. * * RETURN: * None. * */ -static void eth_port_reset(struct mv643xx_private *mp) +static void ethernet_phy_set(struct mv643xx_private *mp, int phy_addr) { - unsigned int port_num = mp->port_num; - unsigned int reg_data; - - mv643xx_eth_port_disable_tx(mp); - mv643xx_eth_port_disable_rx(mp); - - /* Clear all MIB counters */ - eth_clear_mib_counters(mp); + u32 reg_data; + int addr_shift = 5 * mp->port_num; - /* Reset the Enable bit in the Configuration Register */ - reg_data = rdl(mp, PORT_SERIAL_CONTROL_REG(port_num)); - reg_data &= ~(SERIAL_PORT_ENABLE | - DO_NOT_FORCE_LINK_FAIL | - FORCE_LINK_PASS); - wrl(mp, PORT_SERIAL_CONTROL_REG(port_num), reg_data); + reg_data = rdl(mp, PHY_ADDR_REG); + reg_data &= ~(0x1f << addr_shift); + reg_data |= (phy_addr & 0x1f) << addr_shift; + wrl(mp, PHY_ADDR_REG, reg_data); } - /* - * eth_port_read_smi_reg - Read PHY registers + * ethernet_phy_get - Get the ethernet port PHY address. * * DESCRIPTION: - * This routine utilize the SMI interface to interact with the PHY in - * order to perform PHY register read. + * This routine returns the given ethernet port PHY address. * * INPUT: * struct mv643xx_private *mp Ethernet Port. - * unsigned int phy_reg PHY register address offset. - * unsigned int *value Register value buffer. * * OUTPUT: - * Write the value of a specified PHY register into given buffer. + * None. * * RETURN: - * false if the PHY is busy or read data is not in valid state. - * true otherwise. + * PHY address. * */ -static void eth_port_read_smi_reg(struct mv643xx_private *mp, - unsigned int phy_reg, unsigned int *value) +static int ethernet_phy_get(struct mv643xx_private *mp) { - void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG; - int phy_addr = ethernet_phy_get(mp); - unsigned long flags; - int i; - - /* the SMI register is a shared resource */ - spin_lock_irqsave(&mp->shared_smi->phy_lock, flags); - - /* wait for the SMI register to become available */ - for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) { - if (i == PHY_WAIT_ITERATIONS) { - printk("%s: PHY busy timeout\n", mp->dev->name); - goto out; - } - udelay(PHY_WAIT_MICRO_SECONDS); - } - - writel((phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ, - smi_reg); + unsigned int reg_data; - /* now wait for the data to be valid */ - for (i = 0; !(readl(smi_reg) & ETH_SMI_READ_VALID); i++) { - if (i == PHY_WAIT_ITERATIONS) { - printk("%s: PHY read timeout\n", mp->dev->name); - goto out; - } - udelay(PHY_WAIT_MICRO_SECONDS); - } + reg_data = rdl(mp, PHY_ADDR_REG); - *value = readl(smi_reg) & 0xffff; -out: - spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags); + return ((reg_data >> (5 * mp->port_num)) & 0x1f); } /* - * eth_port_write_smi_reg - Write to PHY registers + * ethernet_phy_detect - Detect whether a phy is present * * DESCRIPTION: - * This routine utilize the SMI interface to interact with the PHY in - * order to perform writes to PHY registers. + * This function tests whether there is a PHY present on + * the specified port. * * INPUT: * struct mv643xx_private *mp Ethernet Port. - * unsigned int phy_reg PHY register address offset. - * unsigned int value Register value. * * OUTPUT: - * Write the given value to the specified PHY register. + * None * * RETURN: - * false if the PHY is busy. - * true otherwise. + * 0 on success + * -ENODEV on failure * */ -static void eth_port_write_smi_reg(struct mv643xx_private *mp, - unsigned int phy_reg, unsigned int value) +static int ethernet_phy_detect(struct mv643xx_private *mp) { - void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG; - int phy_addr = ethernet_phy_get(mp); - unsigned long flags; - int i; + unsigned int phy_reg_data0; + int auto_neg; - /* the SMI register is a shared resource */ - spin_lock_irqsave(&mp->shared_smi->phy_lock, flags); + eth_port_read_smi_reg(mp, 0, &phy_reg_data0); + auto_neg = phy_reg_data0 & 0x1000; + phy_reg_data0 ^= 0x1000; /* invert auto_neg */ + eth_port_write_smi_reg(mp, 0, phy_reg_data0); - /* wait for the SMI register to become available */ - for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) { - if (i == PHY_WAIT_ITERATIONS) { - printk("%s: PHY busy timeout\n", mp->dev->name); - goto out; - } - udelay(PHY_WAIT_MICRO_SECONDS); - } + eth_port_read_smi_reg(mp, 0, &phy_reg_data0); + if ((phy_reg_data0 & 0x1000) == auto_neg) + return -ENODEV; /* change didn't take */ - writel((phy_addr << 16) | (phy_reg << 21) | - ETH_SMI_OPCODE_WRITE | (value & 0xffff), smi_reg); -out: - spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags); + phy_reg_data0 ^= 0x1000; + eth_port_write_smi_reg(mp, 0, phy_reg_data0); + return 0; } -/* - * Wrappers for MII support library. - */ -static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location) +static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address, + int speed, int duplex, + struct ethtool_cmd *cmd) { struct mv643xx_private *mp = netdev_priv(dev); - int val; - eth_port_read_smi_reg(mp, location, &val); - return val; -} + memset(cmd, 0, sizeof(*cmd)); -static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val) -{ - struct mv643xx_private *mp = netdev_priv(dev); - eth_port_write_smi_reg(mp, location, val); + cmd->port = PORT_MII; + cmd->transceiver = XCVR_INTERNAL; + cmd->phy_address = phy_address; + + if (speed == 0) { + cmd->autoneg = AUTONEG_ENABLE; + /* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */ + cmd->speed = SPEED_100; + cmd->advertising = ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_100baseT_Full; + if (mp->mii.supports_gmii) + cmd->advertising |= ADVERTISED_1000baseT_Full; + } else { + cmd->autoneg = AUTONEG_DISABLE; + cmd->speed = speed; + cmd->duplex = duplex; + } } -/* - * eth_port_receive - Get received information from Rx ring. - * - * DESCRIPTION: - * This routine returns the received data to the caller. There is no - * data copying during routine operation. All information is returned - * using pointer to packet information struct passed from the caller. - * If the routine exhausts Rx ring resources then the resource error flag - * is set. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port Control srtuct. - * struct pkt_info *p_pkt_info User packet buffer. +/*/ + * mv643xx_eth_probe * - * OUTPUT: - * Rx ring current and used indexes are updated. + * First function called after registering the network device. + * It's purpose is to initialize the device as an ethernet device, + * fill the ethernet device structure with pointers * to functions, + * and set the MAC address of the interface * - * RETURN: - * ETH_ERROR in case the routine can not access Rx desc ring. - * ETH_QUEUE_FULL if Rx ring resources are exhausted. - * ETH_END_OF_JOB if there is no received data. - * ETH_OK otherwise. + * Input : struct device * + * Output : -ENOMEM if failed , 0 if success */ -static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp, - struct pkt_info *p_pkt_info) +static int mv643xx_eth_probe(struct platform_device *pdev) { - int rx_next_curr_desc, rx_curr_desc, rx_used_desc; - volatile struct eth_rx_desc *p_rx_desc; - unsigned int command_status; - unsigned long flags; + struct mv643xx_eth_platform_data *pd; + int port_num; + struct mv643xx_private *mp; + struct net_device *dev; + u8 *p; + struct resource *res; + int err; + struct ethtool_cmd cmd; + int duplex = DUPLEX_HALF; + int speed = 0; /* default to auto-negotiation */ + DECLARE_MAC_BUF(mac); - /* Do not process Rx ring in case of Rx ring resource error */ - if (mp->rx_resource_err) - return ETH_QUEUE_FULL; + pd = pdev->dev.platform_data; + if (pd == NULL) { + printk(KERN_ERR "No mv643xx_eth_platform_data\n"); + return -ENODEV; + } - spin_lock_irqsave(&mp->lock, flags); + if (pd->shared == NULL) { + printk(KERN_ERR "No mv643xx_eth_platform_data->shared\n"); + return -ENODEV; + } - /* Get the Rx Desc ring 'curr and 'used' indexes */ - rx_curr_desc = mp->rx_curr_desc_q; - rx_used_desc = mp->rx_used_desc_q; + dev = alloc_etherdev(sizeof(struct mv643xx_private)); + if (!dev) + return -ENOMEM; - p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc]; + platform_set_drvdata(pdev, dev); - /* The following parameters are used to save readings from memory */ - command_status = p_rx_desc->cmd_sts; - rmb(); + mp = netdev_priv(dev); + mp->dev = dev; +#ifdef MV643XX_NAPI + netif_napi_add(dev, &mp->napi, mv643xx_poll, 64); +#endif - /* Nothing to receive... */ - if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) { - spin_unlock_irqrestore(&mp->lock, flags); - return ETH_END_OF_JOB; - } + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + BUG_ON(!res); + dev->irq = res->start; - p_pkt_info->byte_cnt = (p_rx_desc->byte_cnt) - RX_BUF_OFFSET; - p_pkt_info->cmd_sts = command_status; - p_pkt_info->buf_ptr = (p_rx_desc->buf_ptr) + RX_BUF_OFFSET; - p_pkt_info->return_info = mp->rx_skb[rx_curr_desc]; - p_pkt_info->l4i_chk = p_rx_desc->buf_size; + dev->open = mv643xx_eth_open; + dev->stop = mv643xx_eth_stop; + dev->hard_start_xmit = mv643xx_eth_start_xmit; + dev->set_mac_address = mv643xx_eth_set_mac_address; + dev->set_multicast_list = mv643xx_eth_set_rx_mode; + + /* No need to Tx Timeout */ + dev->tx_timeout = mv643xx_eth_tx_timeout; + +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = mv643xx_netpoll; +#endif + + dev->watchdog_timeo = 2 * HZ; + dev->base_addr = 0; + dev->change_mtu = mv643xx_eth_change_mtu; + dev->do_ioctl = mv643xx_eth_do_ioctl; + SET_ETHTOOL_OPS(dev, &mv643xx_ethtool_ops); +#ifdef MV643XX_CHECKSUM_OFFLOAD_TX +#ifdef MAX_SKB_FRAGS /* - * Clean the return info field to indicate that the - * packet has been moved to the upper layers + * Zero copy can only work if we use Discovery II memory. Else, we will + * have to map the buffers to ISA memory which is only 16 MB */ - mp->rx_skb[rx_curr_desc] = NULL; + dev->features = NETIF_F_SG | NETIF_F_IP_CSUM; +#endif +#endif - /* Update current index in data structure */ - rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size; - mp->rx_curr_desc_q = rx_next_curr_desc; + /* Configure the timeout task */ + INIT_WORK(&mp->tx_timeout_task, mv643xx_eth_tx_timeout_task); - /* Rx descriptors exhausted. Set the Rx ring resource error flag */ - if (rx_next_curr_desc == rx_used_desc) - mp->rx_resource_err = 1; + spin_lock_init(&mp->lock); - spin_unlock_irqrestore(&mp->lock, flags); + mp->shared = platform_get_drvdata(pd->shared); + port_num = mp->port_num = pd->port_number; - return ETH_OK; -} + if (mp->shared->win_protect) + wrl(mp, WINDOW_PROTECT(port_num), mp->shared->win_protect); -/* - * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring. - * - * DESCRIPTION: - * This routine returns a Rx buffer back to the Rx ring. It retrieves the - * next 'used' descriptor and attached the returned buffer to it. - * In case the Rx ring was in "resource error" condition, where there are - * no available Rx resources, the function resets the resource error flag. - * - * INPUT: - * struct mv643xx_private *mp Ethernet Port Control srtuct. - * struct pkt_info *p_pkt_info Information on returned buffer. - * - * OUTPUT: - * New available Rx resource in Rx descriptor ring. - * - * RETURN: - * ETH_ERROR in case the routine can not access Rx desc ring. - * ETH_OK otherwise. - */ -static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp, - struct pkt_info *p_pkt_info) -{ - int used_rx_desc; /* Where to return Rx resource */ - volatile struct eth_rx_desc *p_used_rx_desc; - unsigned long flags; + mp->shared_smi = mp->shared; + if (pd->shared_smi != NULL) + mp->shared_smi = platform_get_drvdata(pd->shared_smi); + + /* set default config values */ + eth_port_uc_addr_get(mp, dev->dev_addr); + mp->rx_ring_size = PORT_DEFAULT_RECEIVE_QUEUE_SIZE; + mp->tx_ring_size = PORT_DEFAULT_TRANSMIT_QUEUE_SIZE; + + if (is_valid_ether_addr(pd->mac_addr)) + memcpy(dev->dev_addr, pd->mac_addr, 6); + + if (pd->phy_addr || pd->force_phy_addr) + ethernet_phy_set(mp, pd->phy_addr); - spin_lock_irqsave(&mp->lock, flags); + if (pd->rx_queue_size) + mp->rx_ring_size = pd->rx_queue_size; - /* Get 'used' Rx descriptor */ - used_rx_desc = mp->rx_used_desc_q; - p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc]; + if (pd->tx_queue_size) + mp->tx_ring_size = pd->tx_queue_size; - p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr; - p_used_rx_desc->buf_size = p_pkt_info->byte_cnt; - mp->rx_skb[used_rx_desc] = p_pkt_info->return_info; + if (pd->tx_sram_size) { + mp->tx_sram_size = pd->tx_sram_size; + mp->tx_sram_addr = pd->tx_sram_addr; + } - /* Flush the write pipe */ + if (pd->rx_sram_size) { + mp->rx_sram_size = pd->rx_sram_size; + mp->rx_sram_addr = pd->rx_sram_addr; + } - /* Return the descriptor to DMA ownership */ - wmb(); - p_used_rx_desc->cmd_sts = - ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT; - wmb(); + duplex = pd->duplex; + speed = pd->speed; - /* Move the used descriptor pointer to the next descriptor */ - mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size; + /* Hook up MII support for ethtool */ + mp->mii.dev = dev; + mp->mii.mdio_read = mv643xx_mdio_read; + mp->mii.mdio_write = mv643xx_mdio_write; + mp->mii.phy_id = ethernet_phy_get(mp); + mp->mii.phy_id_mask = 0x3f; + mp->mii.reg_num_mask = 0x1f; - /* Any Rx return cancels the Rx resource error status */ - mp->rx_resource_err = 0; + err = ethernet_phy_detect(mp); + if (err) { + pr_debug("%s: No PHY detected at addr %d\n", + dev->name, ethernet_phy_get(mp)); + goto out; + } - spin_unlock_irqrestore(&mp->lock, flags); + ethernet_phy_reset(mp); + mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii); + mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd); + mv643xx_eth_update_pscr(dev, &cmd); + mv643xx_set_settings(dev, &cmd); - return ETH_OK; -} + SET_NETDEV_DEV(dev, &pdev->dev); + err = register_netdev(dev); + if (err) + goto out; -/************* Begin ethtool support *************************/ + p = dev->dev_addr; + printk(KERN_NOTICE + "%s: port %d with MAC address %s\n", + dev->name, port_num, print_mac(mac, p)); -struct mv643xx_stats { - char stat_string[ETH_GSTRING_LEN]; - int sizeof_stat; - int stat_offset; -}; + if (dev->features & NETIF_F_SG) + printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name); -#define MV643XX_STAT(m) FIELD_SIZEOF(struct mv643xx_private, m), \ - offsetof(struct mv643xx_private, m) + if (dev->features & NETIF_F_IP_CSUM) + printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n", + dev->name); -static const struct mv643xx_stats mv643xx_gstrings_stats[] = { - { "rx_packets", MV643XX_STAT(stats.rx_packets) }, - { "tx_packets", MV643XX_STAT(stats.tx_packets) }, - { "rx_bytes", MV643XX_STAT(stats.rx_bytes) }, - { "tx_bytes", MV643XX_STAT(stats.tx_bytes) }, - { "rx_errors", MV643XX_STAT(stats.rx_errors) }, - { "tx_errors", MV643XX_STAT(stats.tx_errors) }, - { "rx_dropped", MV643XX_STAT(stats.rx_dropped) }, - { "tx_dropped", MV643XX_STAT(stats.tx_dropped) }, - { "good_octets_received", MV643XX_STAT(mib_counters.good_octets_received) }, - { "bad_octets_received", MV643XX_STAT(mib_counters.bad_octets_received) }, - { "internal_mac_transmit_err", MV643XX_STAT(mib_counters.internal_mac_transmit_err) }, - { "good_frames_received", MV643XX_STAT(mib_counters.good_frames_received) }, - { "bad_frames_received", MV643XX_STAT(mib_counters.bad_frames_received) }, - { "broadcast_frames_received", MV643XX_STAT(mib_counters.broadcast_frames_received) }, - { "multicast_frames_received", MV643XX_STAT(mib_counters.multicast_frames_received) }, - { "frames_64_octets", MV643XX_STAT(mib_counters.frames_64_octets) }, - { "frames_65_to_127_octets", MV643XX_STAT(mib_counters.frames_65_to_127_octets) }, - { "frames_128_to_255_octets", MV643XX_STAT(mib_counters.frames_128_to_255_octets) }, - { "frames_256_to_511_octets", MV643XX_STAT(mib_counters.frames_256_to_511_octets) }, - { "frames_512_to_1023_octets", MV643XX_STAT(mib_counters.frames_512_to_1023_octets) }, - { "frames_1024_to_max_octets", MV643XX_STAT(mib_counters.frames_1024_to_max_octets) }, - { "good_octets_sent", MV643XX_STAT(mib_counters.good_octets_sent) }, - { "good_frames_sent", MV643XX_STAT(mib_counters.good_frames_sent) }, - { "excessive_collision", MV643XX_STAT(mib_counters.excessive_collision) }, - { "multicast_frames_sent", MV643XX_STAT(mib_counters.multicast_frames_sent) }, - { "broadcast_frames_sent", MV643XX_STAT(mib_counters.broadcast_frames_sent) }, - { "unrec_mac_control_received", MV643XX_STAT(mib_counters.unrec_mac_control_received) }, - { "fc_sent", MV643XX_STAT(mib_counters.fc_sent) }, - { "good_fc_received", MV643XX_STAT(mib_counters.good_fc_received) }, - { "bad_fc_received", MV643XX_STAT(mib_counters.bad_fc_received) }, - { "undersize_received", MV643XX_STAT(mib_counters.undersize_received) }, - { "fragments_received", MV643XX_STAT(mib_counters.fragments_received) }, - { "oversize_received", MV643XX_STAT(mib_counters.oversize_received) }, - { "jabber_received", MV643XX_STAT(mib_counters.jabber_received) }, - { "mac_receive_error", MV643XX_STAT(mib_counters.mac_receive_error) }, - { "bad_crc_event", MV643XX_STAT(mib_counters.bad_crc_event) }, - { "collision", MV643XX_STAT(mib_counters.collision) }, - { "late_collision", MV643XX_STAT(mib_counters.late_collision) }, -}; +#ifdef MV643XX_CHECKSUM_OFFLOAD_TX + printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name); +#endif -#define MV643XX_STATS_LEN ARRAY_SIZE(mv643xx_gstrings_stats) +#ifdef MV643XX_COAL + printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n", + dev->name); +#endif -static void mv643xx_get_drvinfo(struct net_device *netdev, - struct ethtool_drvinfo *drvinfo) -{ - strncpy(drvinfo->driver, mv643xx_driver_name, 32); - strncpy(drvinfo->version, mv643xx_driver_version, 32); - strncpy(drvinfo->fw_version, "N/A", 32); - strncpy(drvinfo->bus_info, "mv643xx", 32); - drvinfo->n_stats = MV643XX_STATS_LEN; -} +#ifdef MV643XX_NAPI + printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name); +#endif -static int mv643xx_get_sset_count(struct net_device *netdev, int sset) -{ - switch (sset) { - case ETH_SS_STATS: - return MV643XX_STATS_LEN; - default: - return -EOPNOTSUPP; - } -} + if (mp->tx_sram_size > 0) + printk(KERN_NOTICE "%s: Using SRAM\n", dev->name); -static void mv643xx_get_ethtool_stats(struct net_device *netdev, - struct ethtool_stats *stats, uint64_t *data) -{ - struct mv643xx_private *mp = netdev->priv; - int i; + return 0; - eth_update_mib_counters(mp); +out: + free_netdev(dev); - for (i = 0; i < MV643XX_STATS_LEN; i++) { - char *p = (char *)mp+mv643xx_gstrings_stats[i].stat_offset; - data[i] = (mv643xx_gstrings_stats[i].sizeof_stat == - sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p; - } + return err; } -static void mv643xx_get_strings(struct net_device *netdev, uint32_t stringset, - uint8_t *data) +static int mv643xx_eth_remove(struct platform_device *pdev) { - int i; + struct net_device *dev = platform_get_drvdata(pdev); - switch(stringset) { - case ETH_SS_STATS: - for (i=0; i < MV643XX_STATS_LEN; i++) { - memcpy(data + i * ETH_GSTRING_LEN, - mv643xx_gstrings_stats[i].stat_string, - ETH_GSTRING_LEN); - } - break; - } + unregister_netdev(dev); + flush_scheduled_work(); + + free_netdev(dev); + platform_set_drvdata(pdev, NULL); + return 0; } -static u32 mv643xx_eth_get_link(struct net_device *dev) +static void mv643xx_eth_shutdown(struct platform_device *pdev) { + struct net_device *dev = platform_get_drvdata(pdev); struct mv643xx_private *mp = netdev_priv(dev); + unsigned int port_num = mp->port_num; - return mii_link_ok(&mp->mii); + /* Mask all interrupts on ethernet port */ + wrl(mp, INTERRUPT_MASK_REG(port_num), 0); + rdl(mp, INTERRUPT_MASK_REG(port_num)); + + eth_port_reset(mp); } -static int mv643xx_eth_nway_restart(struct net_device *dev) +static struct platform_driver mv643xx_eth_driver = { + .probe = mv643xx_eth_probe, + .remove = mv643xx_eth_remove, + .shutdown = mv643xx_eth_shutdown, + .driver = { + .name = MV643XX_ETH_NAME, + .owner = THIS_MODULE, + }, +}; + +/* + * mv643xx_init_module + * + * Registers the network drivers into the Linux kernel + * + * Input : N/A + * + * Output : N/A + */ +static int __init mv643xx_init_module(void) { - struct mv643xx_private *mp = netdev_priv(dev); + int rc; - return mii_nway_restart(&mp->mii); + rc = platform_driver_register(&mv643xx_eth_shared_driver); + if (!rc) { + rc = platform_driver_register(&mv643xx_eth_driver); + if (rc) + platform_driver_unregister(&mv643xx_eth_shared_driver); + } + return rc; } -static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +/* + * mv643xx_cleanup_module + * + * Registers the network drivers into the Linux kernel + * + * Input : N/A + * + * Output : N/A + */ +static void __exit mv643xx_cleanup_module(void) { - struct mv643xx_private *mp = netdev_priv(dev); - - return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL); + platform_driver_unregister(&mv643xx_eth_driver); + platform_driver_unregister(&mv643xx_eth_shared_driver); } -static const struct ethtool_ops mv643xx_ethtool_ops = { - .get_settings = mv643xx_get_settings, - .set_settings = mv643xx_set_settings, - .get_drvinfo = mv643xx_get_drvinfo, - .get_link = mv643xx_eth_get_link, - .set_sg = ethtool_op_set_sg, - .get_sset_count = mv643xx_get_sset_count, - .get_ethtool_stats = mv643xx_get_ethtool_stats, - .get_strings = mv643xx_get_strings, - .nway_reset = mv643xx_eth_nway_restart, -}; +module_init(mv643xx_init_module); +module_exit(mv643xx_cleanup_module); -/************* End ethtool support *************************/ +MODULE_LICENSE("GPL"); +MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani" + " and Dale Farnsworth"); +MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); +MODULE_ALIAS("platform:" MV643XX_ETH_NAME); +MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); -- 2.20.1