diff options
Diffstat (limited to 'drivers/net/ll_temac_main.c')
| -rw-r--r-- | drivers/net/ll_temac_main.c | 1154 |
1 files changed, 0 insertions, 1154 deletions
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c deleted file mode 100644 index 728fe41..0000000 --- a/drivers/net/ll_temac_main.c +++ /dev/null @@ -1,1154 +0,0 @@ -/* - * Driver for Xilinx TEMAC Ethernet device - * - * Copyright (c) 2008 Nissin Systems Co., Ltd., Yoshio Kashiwagi - * Copyright (c) 2005-2008 DLA Systems, David H. Lynch Jr. <dhlii@dlasys.net> - * Copyright (c) 2008-2009 Secret Lab Technologies Ltd. - * - * This is a driver for the Xilinx ll_temac ipcore which is often used - * in the Virtex and Spartan series of chips. - * - * Notes: - * - The ll_temac hardware uses indirect access for many of the TEMAC - * registers, include the MDIO bus. However, indirect access to MDIO - * registers take considerably more clock cycles than to TEMAC registers. - * MDIO accesses are long, so threads doing them should probably sleep - * rather than busywait. However, since only one indirect access can be - * in progress at any given time, that means that *all* indirect accesses - * could end up sleeping (to wait for an MDIO access to complete). - * Fortunately none of the indirect accesses are on the 'hot' path for tx - * or rx, so this should be okay. - * - * TODO: - * - Factor out locallink DMA code into separate driver - * - Fix multicast assignment. - * - Fix support for hardware checksumming. - * - Testing. Lots and lots of testing. - * - */ - -#include <linux/delay.h> -#include <linux/etherdevice.h> -#include <linux/init.h> -#include <linux/mii.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/netdevice.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_mdio.h> -#include <linux/of_platform.h> -#include <linux/of_address.h> -#include <linux/skbuff.h> -#include <linux/spinlock.h> -#include <linux/tcp.h> /* needed for sizeof(tcphdr) */ -#include <linux/udp.h> /* needed for sizeof(udphdr) */ -#include <linux/phy.h> -#include <linux/in.h> -#include <linux/io.h> -#include <linux/ip.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/dma-mapping.h> - -#include "ll_temac.h" - -#define TX_BD_NUM 64 -#define RX_BD_NUM 128 - -/* --------------------------------------------------------------------- - * Low level register access functions - */ - -u32 temac_ior(struct temac_local *lp, int offset) -{ - return in_be32((u32 *)(lp->regs + offset)); -} - -void temac_iow(struct temac_local *lp, int offset, u32 value) -{ - out_be32((u32 *) (lp->regs + offset), value); -} - -int temac_indirect_busywait(struct temac_local *lp) -{ - long end = jiffies + 2; - - while (!(temac_ior(lp, XTE_RDY0_OFFSET) & XTE_RDY0_HARD_ACS_RDY_MASK)) { - if (end - jiffies <= 0) { - WARN_ON(1); - return -ETIMEDOUT; - } - msleep(1); - } - return 0; -} - -/** - * temac_indirect_in32 - * - * lp->indirect_mutex must be held when calling this function - */ -u32 temac_indirect_in32(struct temac_local *lp, int reg) -{ - u32 val; - - if (temac_indirect_busywait(lp)) - return -ETIMEDOUT; - temac_iow(lp, XTE_CTL0_OFFSET, reg); - if (temac_indirect_busywait(lp)) - return -ETIMEDOUT; - val = temac_ior(lp, XTE_LSW0_OFFSET); - - return val; -} - -/** - * temac_indirect_out32 - * - * lp->indirect_mutex must be held when calling this function - */ -void temac_indirect_out32(struct temac_local *lp, int reg, u32 value) -{ - if (temac_indirect_busywait(lp)) - return; - temac_iow(lp, XTE_LSW0_OFFSET, value); - temac_iow(lp, XTE_CTL0_OFFSET, CNTLREG_WRITE_ENABLE_MASK | reg); -} - -/** - * temac_dma_in32 - Memory mapped DMA read, this function expects a - * register input that is based on DCR word addresses which - * are then converted to memory mapped byte addresses - */ -static u32 temac_dma_in32(struct temac_local *lp, int reg) -{ - return in_be32((u32 *)(lp->sdma_regs + (reg << 2))); -} - -/** - * temac_dma_out32 - Memory mapped DMA read, this function expects a - * register input that is based on DCR word addresses which - * are then converted to memory mapped byte addresses - */ -static void temac_dma_out32(struct temac_local *lp, int reg, u32 value) -{ - out_be32((u32 *)(lp->sdma_regs + (reg << 2)), value); -} - -/* DMA register access functions can be DCR based or memory mapped. - * The PowerPC 440 is DCR based, the PowerPC 405 and MicroBlaze are both - * memory mapped. - */ -#ifdef CONFIG_PPC_DCR - -/** - * temac_dma_dcr_in32 - DCR based DMA read - */ -static u32 temac_dma_dcr_in(struct temac_local *lp, int reg) -{ - return dcr_read(lp->sdma_dcrs, reg); -} - -/** - * temac_dma_dcr_out32 - DCR based DMA write - */ -static void temac_dma_dcr_out(struct temac_local *lp, int reg, u32 value) -{ - dcr_write(lp->sdma_dcrs, reg, value); -} - -/** - * temac_dcr_setup - If the DMA is DCR based, then setup the address and - * I/O functions - */ -static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op, - struct device_node *np) -{ - unsigned int dcrs; - - /* setup the dcr address mapping if it's in the device tree */ - - dcrs = dcr_resource_start(np, 0); - if (dcrs != 0) { - lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); - lp->dma_in = temac_dma_dcr_in; - lp->dma_out = temac_dma_dcr_out; - dev_dbg(&op->dev, "DCR base: %x\n", dcrs); - return 0; - } - /* no DCR in the device tree, indicate a failure */ - return -1; -} - -#else - -/* - * temac_dcr_setup - This is a stub for when DCR is not supported, - * such as with MicroBlaze - */ -static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op, - struct device_node *np) -{ - return -1; -} - -#endif - -/** - * * temac_dma_bd_release - Release buffer descriptor rings - */ -static void temac_dma_bd_release(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - int i; - - for (i = 0; i < RX_BD_NUM; i++) { - if (!lp->rx_skb[i]) - break; - else { - dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys, - XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE); - dev_kfree_skb(lp->rx_skb[i]); - } - } - if (lp->rx_bd_v) - dma_free_coherent(ndev->dev.parent, - sizeof(*lp->rx_bd_v) * RX_BD_NUM, - lp->rx_bd_v, lp->rx_bd_p); - if (lp->tx_bd_v) - dma_free_coherent(ndev->dev.parent, - sizeof(*lp->tx_bd_v) * TX_BD_NUM, - lp->tx_bd_v, lp->tx_bd_p); - if (lp->rx_skb) - kfree(lp->rx_skb); -} - -/** - * temac_dma_bd_init - Setup buffer descriptor rings - */ -static int temac_dma_bd_init(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - struct sk_buff *skb; - int i; - - lp->rx_skb = kzalloc(sizeof(*lp->rx_skb) * RX_BD_NUM, GFP_KERNEL); - if (!lp->rx_skb) { - dev_err(&ndev->dev, - "can't allocate memory for DMA RX buffer\n"); - goto out; - } - /* allocate the tx and rx ring buffer descriptors. */ - /* returns a virtual address and a physical address. */ - lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent, - sizeof(*lp->tx_bd_v) * TX_BD_NUM, - &lp->tx_bd_p, GFP_KERNEL); - if (!lp->tx_bd_v) { - dev_err(&ndev->dev, - "unable to allocate DMA TX buffer descriptors"); - goto out; - } - lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent, - sizeof(*lp->rx_bd_v) * RX_BD_NUM, - &lp->rx_bd_p, GFP_KERNEL); - if (!lp->rx_bd_v) { - dev_err(&ndev->dev, - "unable to allocate DMA RX buffer descriptors"); - goto out; - } - - memset(lp->tx_bd_v, 0, sizeof(*lp->tx_bd_v) * TX_BD_NUM); - for (i = 0; i < TX_BD_NUM; i++) { - lp->tx_bd_v[i].next = lp->tx_bd_p + - sizeof(*lp->tx_bd_v) * ((i + 1) % TX_BD_NUM); - } - - memset(lp->rx_bd_v, 0, sizeof(*lp->rx_bd_v) * RX_BD_NUM); - for (i = 0; i < RX_BD_NUM; i++) { - lp->rx_bd_v[i].next = lp->rx_bd_p + - sizeof(*lp->rx_bd_v) * ((i + 1) % RX_BD_NUM); - - skb = netdev_alloc_skb_ip_align(ndev, - XTE_MAX_JUMBO_FRAME_SIZE); - - if (skb == 0) { - dev_err(&ndev->dev, "alloc_skb error %d\n", i); - goto out; - } - lp->rx_skb[i] = skb; - /* returns physical address of skb->data */ - lp->rx_bd_v[i].phys = dma_map_single(ndev->dev.parent, - skb->data, - XTE_MAX_JUMBO_FRAME_SIZE, - DMA_FROM_DEVICE); - lp->rx_bd_v[i].len = XTE_MAX_JUMBO_FRAME_SIZE; - lp->rx_bd_v[i].app0 = STS_CTRL_APP0_IRQONEND; - } - - lp->dma_out(lp, TX_CHNL_CTRL, 0x10220400 | - CHNL_CTRL_IRQ_EN | - CHNL_CTRL_IRQ_DLY_EN | - CHNL_CTRL_IRQ_COAL_EN); - /* 0x10220483 */ - /* 0x00100483 */ - lp->dma_out(lp, RX_CHNL_CTRL, 0xff070000 | - CHNL_CTRL_IRQ_EN | - CHNL_CTRL_IRQ_DLY_EN | - CHNL_CTRL_IRQ_COAL_EN | - CHNL_CTRL_IRQ_IOE); - /* 0xff010283 */ - - lp->dma_out(lp, RX_CURDESC_PTR, lp->rx_bd_p); - lp->dma_out(lp, RX_TAILDESC_PTR, - lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1))); - lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p); - - return 0; - -out: - temac_dma_bd_release(ndev); - return -ENOMEM; -} - -/* --------------------------------------------------------------------- - * net_device_ops - */ - -static int temac_set_mac_address(struct net_device *ndev, void *address) -{ - struct temac_local *lp = netdev_priv(ndev); - - if (address) - memcpy(ndev->dev_addr, address, ETH_ALEN); - - if (!is_valid_ether_addr(ndev->dev_addr)) - random_ether_addr(ndev->dev_addr); - - /* set up unicast MAC address filter set its mac address */ - mutex_lock(&lp->indirect_mutex); - temac_indirect_out32(lp, XTE_UAW0_OFFSET, - (ndev->dev_addr[0]) | - (ndev->dev_addr[1] << 8) | - (ndev->dev_addr[2] << 16) | - (ndev->dev_addr[3] << 24)); - /* There are reserved bits in EUAW1 - * so don't affect them Set MAC bits [47:32] in EUAW1 */ - temac_indirect_out32(lp, XTE_UAW1_OFFSET, - (ndev->dev_addr[4] & 0x000000ff) | - (ndev->dev_addr[5] << 8)); - mutex_unlock(&lp->indirect_mutex); - - return 0; -} - -static int netdev_set_mac_address(struct net_device *ndev, void *p) -{ - struct sockaddr *addr = p; - - return temac_set_mac_address(ndev, addr->sa_data); -} - -static void temac_set_multicast_list(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - u32 multi_addr_msw, multi_addr_lsw, val; - int i; - - mutex_lock(&lp->indirect_mutex); - if (ndev->flags & (IFF_ALLMULTI | IFF_PROMISC) || - netdev_mc_count(ndev) > MULTICAST_CAM_TABLE_NUM) { - /* - * We must make the kernel realise we had to move - * into promisc mode or we start all out war on - * the cable. If it was a promisc request the - * flag is already set. If not we assert it. - */ - ndev->flags |= IFF_PROMISC; - temac_indirect_out32(lp, XTE_AFM_OFFSET, XTE_AFM_EPPRM_MASK); - dev_info(&ndev->dev, "Promiscuous mode enabled.\n"); - } else if (!netdev_mc_empty(ndev)) { - struct netdev_hw_addr *ha; - - i = 0; - netdev_for_each_mc_addr(ha, ndev) { - if (i >= MULTICAST_CAM_TABLE_NUM) - break; - multi_addr_msw = ((ha->addr[3] << 24) | - (ha->addr[2] << 16) | - (ha->addr[1] << 8) | - (ha->addr[0])); - temac_indirect_out32(lp, XTE_MAW0_OFFSET, - multi_addr_msw); - multi_addr_lsw = ((ha->addr[5] << 8) | - (ha->addr[4]) | (i << 16)); - temac_indirect_out32(lp, XTE_MAW1_OFFSET, - multi_addr_lsw); - i++; - } - } else { - val = temac_indirect_in32(lp, XTE_AFM_OFFSET); - temac_indirect_out32(lp, XTE_AFM_OFFSET, - val & ~XTE_AFM_EPPRM_MASK); - temac_indirect_out32(lp, XTE_MAW0_OFFSET, 0); - temac_indirect_out32(lp, XTE_MAW1_OFFSET, 0); - dev_info(&ndev->dev, "Promiscuous mode disabled.\n"); - } - mutex_unlock(&lp->indirect_mutex); -} - -struct temac_option { - int flg; - u32 opt; - u32 reg; - u32 m_or; - u32 m_and; -} temac_options[] = { - /* Turn on jumbo packet support for both Rx and Tx */ - { - .opt = XTE_OPTION_JUMBO, - .reg = XTE_TXC_OFFSET, - .m_or = XTE_TXC_TXJMBO_MASK, - }, - { - .opt = XTE_OPTION_JUMBO, - .reg = XTE_RXC1_OFFSET, - .m_or =XTE_RXC1_RXJMBO_MASK, - }, - /* Turn on VLAN packet support for both Rx and Tx */ - { - .opt = XTE_OPTION_VLAN, - .reg = XTE_TXC_OFFSET, - .m_or =XTE_TXC_TXVLAN_MASK, - }, - { - .opt = XTE_OPTION_VLAN, - .reg = XTE_RXC1_OFFSET, - .m_or =XTE_RXC1_RXVLAN_MASK, - }, - /* Turn on FCS stripping on receive packets */ - { - .opt = XTE_OPTION_FCS_STRIP, - .reg = XTE_RXC1_OFFSET, - .m_or =XTE_RXC1_RXFCS_MASK, - }, - /* Turn on FCS insertion on transmit packets */ - { - .opt = XTE_OPTION_FCS_INSERT, - .reg = XTE_TXC_OFFSET, - .m_or =XTE_TXC_TXFCS_MASK, - }, - /* Turn on length/type field checking on receive packets */ - { - .opt = XTE_OPTION_LENTYPE_ERR, - .reg = XTE_RXC1_OFFSET, - .m_or =XTE_RXC1_RXLT_MASK, - }, - /* Turn on flow control */ - { - .opt = XTE_OPTION_FLOW_CONTROL, - .reg = XTE_FCC_OFFSET, - .m_or =XTE_FCC_RXFLO_MASK, - }, - /* Turn on flow control */ - { - .opt = XTE_OPTION_FLOW_CONTROL, - .reg = XTE_FCC_OFFSET, - .m_or =XTE_FCC_TXFLO_MASK, - }, - /* Turn on promiscuous frame filtering (all frames are received ) */ - { - .opt = XTE_OPTION_PROMISC, - .reg = XTE_AFM_OFFSET, - .m_or =XTE_AFM_EPPRM_MASK, - }, - /* Enable transmitter if not already enabled */ - { - .opt = XTE_OPTION_TXEN, - .reg = XTE_TXC_OFFSET, - .m_or =XTE_TXC_TXEN_MASK, - }, - /* Enable receiver? */ - { - .opt = XTE_OPTION_RXEN, - .reg = XTE_RXC1_OFFSET, - .m_or =XTE_RXC1_RXEN_MASK, - }, - {} -}; - -/** - * temac_setoptions - */ -static u32 temac_setoptions(struct net_device *ndev, u32 options) -{ - struct temac_local *lp = netdev_priv(ndev); - struct temac_option *tp = &temac_options[0]; - int reg; - - mutex_lock(&lp->indirect_mutex); - while (tp->opt) { - reg = temac_indirect_in32(lp, tp->reg) & ~tp->m_or; - if (options & tp->opt) - reg |= tp->m_or; - temac_indirect_out32(lp, tp->reg, reg); - tp++; - } - lp->options |= options; - mutex_unlock(&lp->indirect_mutex); - - return 0; -} - -/* Initialize temac */ -static void temac_device_reset(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - u32 timeout; - u32 val; - - /* Perform a software reset */ - - /* 0x300 host enable bit ? */ - /* reset PHY through control register ?:1 */ - - dev_dbg(&ndev->dev, "%s()\n", __func__); - - mutex_lock(&lp->indirect_mutex); - /* Reset the receiver and wait for it to finish reset */ - temac_indirect_out32(lp, XTE_RXC1_OFFSET, XTE_RXC1_RXRST_MASK); - timeout = 1000; - while (temac_indirect_in32(lp, XTE_RXC1_OFFSET) & XTE_RXC1_RXRST_MASK) { - udelay(1); - if (--timeout == 0) { - dev_err(&ndev->dev, - "temac_device_reset RX reset timeout!!\n"); - break; - } - } - - /* Reset the transmitter and wait for it to finish reset */ - temac_indirect_out32(lp, XTE_TXC_OFFSET, XTE_TXC_TXRST_MASK); - timeout = 1000; - while (temac_indirect_in32(lp, XTE_TXC_OFFSET) & XTE_TXC_TXRST_MASK) { - udelay(1); - if (--timeout == 0) { - dev_err(&ndev->dev, - "temac_device_reset TX reset timeout!!\n"); - break; - } - } - - /* Disable the receiver */ - val = temac_indirect_in32(lp, XTE_RXC1_OFFSET); - temac_indirect_out32(lp, XTE_RXC1_OFFSET, val & ~XTE_RXC1_RXEN_MASK); - - /* Reset Local Link (DMA) */ - lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST); - timeout = 1000; - while (lp->dma_in(lp, DMA_CONTROL_REG) & DMA_CONTROL_RST) { - udelay(1); - if (--timeout == 0) { - dev_err(&ndev->dev, - "temac_device_reset DMA reset timeout!!\n"); - break; - } - } - lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE); - - if (temac_dma_bd_init(ndev)) { - dev_err(&ndev->dev, - "temac_device_reset descriptor allocation failed\n"); - } - - temac_indirect_out32(lp, XTE_RXC0_OFFSET, 0); - temac_indirect_out32(lp, XTE_RXC1_OFFSET, 0); - temac_indirect_out32(lp, XTE_TXC_OFFSET, 0); - temac_indirect_out32(lp, XTE_FCC_OFFSET, XTE_FCC_RXFLO_MASK); - - mutex_unlock(&lp->indirect_mutex); - - /* Sync default options with HW - * but leave receiver and transmitter disabled. */ - temac_setoptions(ndev, - lp->options & ~(XTE_OPTION_TXEN | XTE_OPTION_RXEN)); - - temac_set_mac_address(ndev, NULL); - - /* Set address filter table */ - temac_set_multicast_list(ndev); - if (temac_setoptions(ndev, lp->options)) - dev_err(&ndev->dev, "Error setting TEMAC options\n"); - - /* Init Driver variable */ - ndev->trans_start = jiffies; /* prevent tx timeout */ -} - -void temac_adjust_link(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - struct phy_device *phy = lp->phy_dev; - u32 mii_speed; - int link_state; - - /* hash together the state values to decide if something has changed */ - link_state = phy->speed | (phy->duplex << 1) | phy->link; - - mutex_lock(&lp->indirect_mutex); - if (lp->last_link != link_state) { - mii_speed = temac_indirect_in32(lp, XTE_EMCFG_OFFSET); - mii_speed &= ~XTE_EMCFG_LINKSPD_MASK; - - switch (phy->speed) { - case SPEED_1000: mii_speed |= XTE_EMCFG_LINKSPD_1000; break; - case SPEED_100: mii_speed |= XTE_EMCFG_LINKSPD_100; break; - case SPEED_10: mii_speed |= XTE_EMCFG_LINKSPD_10; break; - } - - /* Write new speed setting out to TEMAC */ - temac_indirect_out32(lp, XTE_EMCFG_OFFSET, mii_speed); - lp->last_link = link_state; - phy_print_status(phy); - } - mutex_unlock(&lp->indirect_mutex); -} - -static void temac_start_xmit_done(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - struct cdmac_bd *cur_p; - unsigned int stat = 0; - - cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; - stat = cur_p->app0; - - while (stat & STS_CTRL_APP0_CMPLT) { - dma_unmap_single(ndev->dev.parent, cur_p->phys, cur_p->len, - DMA_TO_DEVICE); - if (cur_p->app4) - dev_kfree_skb_irq((struct sk_buff *)cur_p->app4); - cur_p->app0 = 0; - cur_p->app1 = 0; - cur_p->app2 = 0; - cur_p->app3 = 0; - cur_p->app4 = 0; - - ndev->stats.tx_packets++; - ndev->stats.tx_bytes += cur_p->len; - - lp->tx_bd_ci++; - if (lp->tx_bd_ci >= TX_BD_NUM) - lp->tx_bd_ci = 0; - - cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; - stat = cur_p->app0; - } - - netif_wake_queue(ndev); -} - -static inline int temac_check_tx_bd_space(struct temac_local *lp, int num_frag) -{ - struct cdmac_bd *cur_p; - int tail; - - tail = lp->tx_bd_tail; - cur_p = &lp->tx_bd_v[tail]; - - do { - if (cur_p->app0) - return NETDEV_TX_BUSY; - - tail++; - if (tail >= TX_BD_NUM) - tail = 0; - - cur_p = &lp->tx_bd_v[tail]; - num_frag--; - } while (num_frag >= 0); - - return 0; -} - -static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - struct cdmac_bd *cur_p; - dma_addr_t start_p, tail_p; - int ii; - unsigned long num_frag; - skb_frag_t *frag; - - num_frag = skb_shinfo(skb)->nr_frags; - frag = &skb_shinfo(skb)->frags[0]; - start_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail; - cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; - - if (temac_check_tx_bd_space(lp, num_frag)) { - if (!netif_queue_stopped(ndev)) { - netif_stop_queue(ndev); - return NETDEV_TX_BUSY; - } - return NETDEV_TX_BUSY; - } - - cur_p->app0 = 0; - if (skb->ip_summed == CHECKSUM_PARTIAL) { - unsigned int csum_start_off = skb_checksum_start_offset(skb); - unsigned int csum_index_off = csum_start_off + skb->csum_offset; - - cur_p->app0 |= 1; /* TX Checksum Enabled */ - cur_p->app1 = (csum_start_off << 16) | csum_index_off; - cur_p->app2 = 0; /* initial checksum seed */ - } - - cur_p->app0 |= STS_CTRL_APP0_SOP; - cur_p->len = skb_headlen(skb); - cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, skb->len, - DMA_TO_DEVICE); - cur_p->app4 = (unsigned long)skb; - - for (ii = 0; ii < num_frag; ii++) { - lp->tx_bd_tail++; - if (lp->tx_bd_tail >= TX_BD_NUM) - lp->tx_bd_tail = 0; - - cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; - cur_p->phys = dma_map_single(ndev->dev.parent, - (void *)page_address(frag->page) + - frag->page_offset, - frag->size, DMA_TO_DEVICE); - cur_p->len = frag->size; - cur_p->app0 = 0; - frag++; - } - cur_p->app0 |= STS_CTRL_APP0_EOP; - - tail_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail; - lp->tx_bd_tail++; - if (lp->tx_bd_tail >= TX_BD_NUM) - lp->tx_bd_tail = 0; - - skb_tx_timestamp(skb); - - /* Kick off the transfer */ - lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */ - - return NETDEV_TX_OK; -} - - -static void ll_temac_recv(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - struct sk_buff *skb, *new_skb; - unsigned int bdstat; - struct cdmac_bd *cur_p; - dma_addr_t tail_p; - int length; - unsigned long flags; - - spin_lock_irqsave(&lp->rx_lock, flags); - - tail_p = lp->rx_bd_p + sizeof(*lp->rx_bd_v) * lp->rx_bd_ci; - cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; - - bdstat = cur_p->app0; - while ((bdstat & STS_CTRL_APP0_CMPLT)) { - - skb = lp->rx_skb[lp->rx_bd_ci]; - length = cur_p->app4 & 0x3FFF; - - dma_unmap_single(ndev->dev.parent, cur_p->phys, length, - DMA_FROM_DEVICE); - - skb_put(skb, length); - skb->dev = ndev; - skb->protocol = eth_type_trans(skb, ndev); - skb_checksum_none_assert(skb); - - /* if we're doing rx csum offload, set it up */ - if (((lp->temac_features & TEMAC_FEATURE_RX_CSUM) != 0) && - (skb->protocol == __constant_htons(ETH_P_IP)) && - (skb->len > 64)) { - - skb->csum = cur_p->app3 & 0xFFFF; - skb->ip_summed = CHECKSUM_COMPLETE; - } - - if (!skb_defer_rx_timestamp(skb)) - netif_rx(skb); - - ndev->stats.rx_packets++; - ndev->stats.rx_bytes += length; - - new_skb = netdev_alloc_skb_ip_align(ndev, - XTE_MAX_JUMBO_FRAME_SIZE); - - if (new_skb == 0) { - dev_err(&ndev->dev, "no memory for new sk_buff\n"); - spin_unlock_irqrestore(&lp->rx_lock, flags); - return; - } - - cur_p->app0 = STS_CTRL_APP0_IRQONEND; - cur_p->phys = dma_map_single(ndev->dev.parent, new_skb->data, - XTE_MAX_JUMBO_FRAME_SIZE, - DMA_FROM_DEVICE); - cur_p->len = XTE_MAX_JUMBO_FRAME_SIZE; - lp->rx_skb[lp->rx_bd_ci] = new_skb; - - lp->rx_bd_ci++; - if (lp->rx_bd_ci >= RX_BD_NUM) - lp->rx_bd_ci = 0; - - cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; - bdstat = cur_p->app0; - } - lp->dma_out(lp, RX_TAILDESC_PTR, tail_p); - - spin_unlock_irqrestore(&lp->rx_lock, flags); -} - -static irqreturn_t ll_temac_tx_irq(int irq, void *_ndev) -{ - struct net_device *ndev = _ndev; - struct temac_local *lp = netdev_priv(ndev); - unsigned int status; - - status = lp->dma_in(lp, TX_IRQ_REG); - lp->dma_out(lp, TX_IRQ_REG, status); - - if (status & (IRQ_COAL | IRQ_DLY)) - temac_start_xmit_done(lp->ndev); - if (status & 0x080) - dev_err(&ndev->dev, "DMA error 0x%x\n", status); - - return IRQ_HANDLED; -} - -static irqreturn_t ll_temac_rx_irq(int irq, void *_ndev) -{ - struct net_device *ndev = _ndev; - struct temac_local *lp = netdev_priv(ndev); - unsigned int status; - - /* Read and clear the status registers */ - status = lp->dma_in(lp, RX_IRQ_REG); - lp->dma_out(lp, RX_IRQ_REG, status); - - if (status & (IRQ_COAL | IRQ_DLY)) - ll_temac_recv(lp->ndev); - - return IRQ_HANDLED; -} - -static int temac_open(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - int rc; - - dev_dbg(&ndev->dev, "temac_open()\n"); - - if (lp->phy_node) { - lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node, - temac_adjust_link, 0, 0); - if (!lp->phy_dev) { - dev_err(lp->dev, "of_phy_connect() failed\n"); - return -ENODEV; - } - - phy_start(lp->phy_dev); - } - - rc = request_irq(lp->tx_irq, ll_temac_tx_irq, 0, ndev->name, ndev); - if (rc) - goto err_tx_irq; - rc = request_irq(lp->rx_irq, ll_temac_rx_irq, 0, ndev->name, ndev); - if (rc) - goto err_rx_irq; - - temac_device_reset(ndev); - return 0; - - err_rx_irq: - free_irq(lp->tx_irq, ndev); - err_tx_irq: - if (lp->phy_dev) - phy_disconnect(lp->phy_dev); - lp->phy_dev = NULL; - dev_err(lp->dev, "request_irq() failed\n"); - return rc; -} - -static int temac_stop(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - - dev_dbg(&ndev->dev, "temac_close()\n"); - - free_irq(lp->tx_irq, ndev); - free_irq(lp->rx_irq, ndev); - - if (lp->phy_dev) - phy_disconnect(lp->phy_dev); - lp->phy_dev = NULL; - - temac_dma_bd_release(ndev); - - return 0; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void -temac_poll_controller(struct net_device *ndev) -{ - struct temac_local *lp = netdev_priv(ndev); - - disable_irq(lp->tx_irq); - disable_irq(lp->rx_irq); - - ll_temac_rx_irq(lp->tx_irq, ndev); - ll_temac_tx_irq(lp->rx_irq, ndev); - - enable_irq(lp->tx_irq); - enable_irq(lp->rx_irq); -} -#endif - -static const struct net_device_ops temac_netdev_ops = { - .ndo_open = temac_open, - .ndo_stop = temac_stop, - .ndo_start_xmit = temac_start_xmit, - .ndo_set_mac_address = netdev_set_mac_address, - .ndo_validate_addr = eth_validate_addr, - //.ndo_set_multicast_list = temac_set_multicast_list, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = temac_poll_controller, -#endif -}; - -/* --------------------------------------------------------------------- - * SYSFS device attributes - */ -static ssize_t temac_show_llink_regs(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct net_device *ndev = dev_get_drvdata(dev); - struct temac_local *lp = netdev_priv(ndev); - int i, len = 0; - - for (i = 0; i < 0x11; i++) - len += sprintf(buf + len, "%.8x%s", lp->dma_in(lp, i), - (i % 8) == 7 ? "\n" : " "); - len += sprintf(buf + len, "\n"); - - return len; -} - -static DEVICE_ATTR(llink_regs, 0440, temac_show_llink_regs, NULL); - -static struct attribute *temac_device_attrs[] = { - &dev_attr_llink_regs.attr, - NULL, -}; - -static const struct attribute_group temac_attr_group = { - .attrs = temac_device_attrs, -}; - -static int __devinit temac_of_probe(struct platform_device *op) -{ - struct device_node *np; - struct temac_local *lp; - struct net_device *ndev; - const void *addr; - __be32 *p; - int size, rc = 0; - - /* Init network device structure */ - ndev = alloc_etherdev(sizeof(*lp)); - if (!ndev) { - dev_err(&op->dev, "could not allocate device.\n"); - return -ENOMEM; - } - ether_setup(ndev); - dev_set_drvdata(&op->dev, ndev); - SET_NETDEV_DEV(ndev, &op->dev); - ndev->flags &= ~IFF_MULTICAST; /* clear multicast */ - ndev->features = NETIF_F_SG | NETIF_F_FRAGLIST; - ndev->netdev_ops = &temac_netdev_ops; -#if 0 - ndev->features |= NETIF_F_IP_CSUM; /* Can checksum TCP/UDP over IPv4. */ - ndev->features |= NETIF_F_HW_CSUM; /* Can checksum all the packets. */ - ndev->features |= NETIF_F_IPV6_CSUM; /* Can checksum IPV6 TCP/UDP */ - ndev->features |= NETIF_F_HIGHDMA; /* Can DMA to high memory. */ - ndev->features |= NETIF_F_HW_VLAN_TX; /* Transmit VLAN hw accel */ - ndev->features |= NETIF_F_HW_VLAN_RX; /* Receive VLAN hw acceleration */ - ndev->features |= NETIF_F_HW_VLAN_FILTER; /* Receive VLAN filtering */ - ndev->features |= NETIF_F_VLAN_CHALLENGED; /* cannot handle VLAN pkts */ - ndev->features |= NETIF_F_GSO; /* Enable software GSO. */ - ndev->features |= NETIF_F_MULTI_QUEUE; /* Has multiple TX/RX queues */ - ndev->features |= NETIF_F_LRO; /* large receive offload */ -#endif - - /* setup temac private info structure */ - lp = netdev_priv(ndev); - lp->ndev = ndev; - lp->dev = &op->dev; - lp->options = XTE_OPTION_DEFAULTS; - spin_lock_init(&lp->rx_lock); - mutex_init(&lp->indirect_mutex); - - /* map device registers */ - lp->regs = of_iomap(op->dev.of_node, 0); - if (!lp->regs) { - dev_err(&op->dev, "could not map temac regs.\n"); - goto nodev; - } - - /* Setup checksum offload, but default to off if not specified */ - lp->temac_features = 0; - p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,txcsum", NULL); - if (p && be32_to_cpu(*p)) { - lp->temac_features |= TEMAC_FEATURE_TX_CSUM; - /* Can checksum TCP/UDP over IPv4. */ - ndev->features |= NETIF_F_IP_CSUM; - } - p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,rxcsum", NULL); - if (p && be32_to_cpu(*p)) - lp->temac_features |= TEMAC_FEATURE_RX_CSUM; - - /* Find the DMA node, map the DMA registers, and decode the DMA IRQs */ - np = of_parse_phandle(op->dev.of_node, "llink-connected", 0); - if (!np) { - dev_err(&op->dev, "could not find DMA node\n"); - goto err_iounmap; - } - - /* Setup the DMA register accesses, could be DCR or memory mapped */ - if (temac_dcr_setup(lp, op, np)) { - - /* no DCR in the device tree, try non-DCR */ - lp->sdma_regs = of_iomap(np, 0); - if (lp->sdma_regs) { - lp->dma_in = temac_dma_in32; - lp->dma_out = temac_dma_out32; - dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs); - } else { - dev_err(&op->dev, "unable to map DMA registers\n"); - of_node_put(np); - goto err_iounmap; - } - } - - lp->rx_irq = irq_of_parse_and_map(np, 0); - lp->tx_irq = irq_of_parse_and_map(np, 1); - - of_node_put(np); /* Finished with the DMA node; drop the reference */ - - if ((lp->rx_irq == NO_IRQ) || (lp->tx_irq == NO_IRQ)) { - dev_err(&op->dev, "could not determine irqs\n"); - rc = -ENOMEM; - goto err_iounmap_2; - } - - - /* Retrieve the MAC address */ - addr = of_get_property(op->dev.of_node, "local-mac-address", &size); - if ((!addr) || (size != 6)) { - dev_err(&op->dev, "could not find MAC address\n"); - rc = -ENODEV; - goto err_iounmap_2; - } - temac_set_mac_address(ndev, (void *)addr); - - rc = temac_mdio_setup(lp, op->dev.of_node); - if (rc) - dev_warn(&op->dev, "error registering MDIO bus\n"); - - lp->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0); - if (lp->phy_node) - dev_dbg(lp->dev, "using PHY node %s (%p)\n", np->full_name, np); - - /* Add the device attributes */ - rc = sysfs_create_group(&lp->dev->kobj, &temac_attr_group); - if (rc) { - dev_err(lp->dev, "Error creating sysfs files\n"); - goto err_iounmap_2; - } - - rc = register_netdev(lp->ndev); - if (rc) { - dev_err(lp->dev, "register_netdev() error (%i)\n", rc); - goto err_register_ndev; - } - - return 0; - - err_register_ndev: - sysfs_remove_group(&lp->dev->kobj, &temac_attr_group); - err_iounmap_2: - if (lp->sdma_regs) - iounmap(lp->sdma_regs); - err_iounmap: - iounmap(lp->regs); - nodev: - free_netdev(ndev); - ndev = NULL; - return rc; -} - -static int __devexit temac_of_remove(struct platform_device *op) -{ - struct net_device *ndev = dev_get_drvdata(&op->dev); - struct temac_local *lp = netdev_priv(ndev); - - temac_mdio_teardown(lp); - unregister_netdev(ndev); - sysfs_remove_group(&lp->dev->kobj, &temac_attr_group); - if (lp->phy_node) - of_node_put(lp->phy_node); - lp->phy_node = NULL; - dev_set_drvdata(&op->dev, NULL); - iounmap(lp->regs); - if (lp->sdma_regs) - iounmap(lp->sdma_regs); - free_netdev(ndev); - return 0; -} - -static struct of_device_id temac_of_match[] __devinitdata = { - { .compatible = "xlnx,xps-ll-temac-1.01.b", }, - { .compatible = "xlnx,xps-ll-temac-2.00.a", }, - { .compatible = "xlnx,xps-ll-temac-2.02.a", }, - { .compatible = "xlnx,xps-ll-temac-2.03.a", }, - {}, -}; -MODULE_DEVICE_TABLE(of, temac_of_match); - -static struct platform_driver temac_of_driver = { - .probe = temac_of_probe, - .remove = __devexit_p(temac_of_remove), - .driver = { - .owner = THIS_MODULE, - .name = "xilinx_temac", - .of_match_table = temac_of_match, - }, -}; - -static int __init temac_init(void) -{ - return platform_driver_register(&temac_of_driver); -} -module_init(temac_init); - -static void __exit temac_exit(void) -{ - platform_driver_unregister(&temac_of_driver); -} -module_exit(temac_exit); - -MODULE_DESCRIPTION("Xilinx LL_TEMAC Ethernet driver"); -MODULE_AUTHOR("Yoshio Kashiwagi"); -MODULE_LICENSE("GPL"); |