diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet-common.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet-common.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/staging/octeon/ethernet-common.c b/drivers/staging/octeon/ethernet-common.c new file mode 100644 index 000000000000..3e6f5b8cc63d --- /dev/null +++ b/drivers/staging/octeon/ethernet-common.c @@ -0,0 +1,328 @@ +/********************************************************************** + * Author: Cavium Networks + * + * Contact: support@caviumnetworks.com + * This file is part of the OCTEON SDK + * + * Copyright (c) 2003-2007 Cavium Networks + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, Version 2, as + * published by the Free Software Foundation. + * + * This file is distributed in the hope that it will be useful, but + * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or + * NONINFRINGEMENT. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this file; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * or visit http://www.gnu.org/licenses/. + * + * This file may also be available under a different license from Cavium. + * Contact Cavium Networks for more information +**********************************************************************/ +#include <linux/kernel.h> +#include <linux/mii.h> +#include <net/dst.h> + +#include <asm/atomic.h> +#include <asm/octeon/octeon.h> + +#include "ethernet-defines.h" +#include "ethernet-tx.h" +#include "ethernet-mdio.h" +#include "ethernet-util.h" +#include "octeon-ethernet.h" +#include "ethernet-common.h" + +#include "cvmx-pip.h" +#include "cvmx-pko.h" +#include "cvmx-fau.h" +#include "cvmx-helper.h" + +#include "cvmx-gmxx-defs.h" + +/** + * Get the low level ethernet statistics + * + * @dev: Device to get the statistics from + * Returns Pointer to the statistics + */ +static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev) +{ + cvmx_pip_port_status_t rx_status; + cvmx_pko_port_status_t tx_status; + struct octeon_ethernet *priv = netdev_priv(dev); + + if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) { + if (octeon_is_simulation()) { + /* The simulator doesn't support statistics */ + memset(&rx_status, 0, sizeof(rx_status)); + memset(&tx_status, 0, sizeof(tx_status)); + } else { + cvmx_pip_get_port_status(priv->port, 1, &rx_status); + cvmx_pko_get_port_status(priv->port, 1, &tx_status); + } + + priv->stats.rx_packets += rx_status.inb_packets; + priv->stats.tx_packets += tx_status.packets; + priv->stats.rx_bytes += rx_status.inb_octets; + priv->stats.tx_bytes += tx_status.octets; + priv->stats.multicast += rx_status.multicast_packets; + priv->stats.rx_crc_errors += rx_status.inb_errors; + priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets; + + /* + * The drop counter must be incremented atomically + * since the RX tasklet also increments it. + */ +#ifdef CONFIG_64BIT + atomic64_add(rx_status.dropped_packets, + (atomic64_t *)&priv->stats.rx_dropped); +#else + atomic_add(rx_status.dropped_packets, + (atomic_t *)&priv->stats.rx_dropped); +#endif + } + + return &priv->stats; +} + +/** + * Set the multicast list. Currently unimplemented. + * + * @dev: Device to work on + */ +static void cvm_oct_common_set_multicast_list(struct net_device *dev) +{ + union cvmx_gmxx_prtx_cfg gmx_cfg; + struct octeon_ethernet *priv = netdev_priv(dev); + int interface = INTERFACE(priv->port); + int index = INDEX(priv->port); + + if ((interface < 2) + && (cvmx_helper_interface_get_mode(interface) != + CVMX_HELPER_INTERFACE_MODE_SPI)) { + union cvmx_gmxx_rxx_adr_ctl control; + control.u64 = 0; + control.s.bcst = 1; /* Allow broadcast MAC addresses */ + + if (dev->mc_list || (dev->flags & IFF_ALLMULTI) || + (dev->flags & IFF_PROMISC)) + /* Force accept multicast packets */ + control.s.mcst = 2; + else + /* Force reject multicat packets */ + control.s.mcst = 1; + + if (dev->flags & IFF_PROMISC) + /* + * Reject matches if promisc. Since CAM is + * shut off, should accept everything. + */ + control.s.cam_mode = 0; + else + /* Filter packets based on the CAM */ + control.s.cam_mode = 1; + + gmx_cfg.u64 = + cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); + cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), + gmx_cfg.u64 & ~1ull); + + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface), + control.u64); + if (dev->flags & IFF_PROMISC) + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN + (index, interface), 0); + else + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN + (index, interface), 1); + + cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), + gmx_cfg.u64); + } +} + +/** + * Set the hardware MAC address for a device + * + * @dev: Device to change the MAC address for + * @addr: Address structure to change it too. MAC address is addr + 2. + * Returns Zero on success + */ +static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + union cvmx_gmxx_prtx_cfg gmx_cfg; + int interface = INTERFACE(priv->port); + int index = INDEX(priv->port); + + memcpy(dev->dev_addr, addr + 2, 6); + + if ((interface < 2) + && (cvmx_helper_interface_get_mode(interface) != + CVMX_HELPER_INTERFACE_MODE_SPI)) { + int i; + uint8_t *ptr = addr; + uint64_t mac = 0; + for (i = 0; i < 6; i++) + mac = (mac << 8) | (uint64_t) (ptr[i + 2]); + + gmx_cfg.u64 = + cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); + cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), + gmx_cfg.u64 & ~1ull); + + cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface), + ptr[2]); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface), + ptr[3]); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface), + ptr[4]); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface), + ptr[5]); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface), + ptr[6]); + cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface), + ptr[7]); + cvm_oct_common_set_multicast_list(dev); + cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), + gmx_cfg.u64); + } + return 0; +} + +/** + * Change the link MTU. Unimplemented + * + * @dev: Device to change + * @new_mtu: The new MTU + * + * Returns Zero on success + */ +static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + int interface = INTERFACE(priv->port); + int index = INDEX(priv->port); +#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) + int vlan_bytes = 4; +#else + int vlan_bytes = 0; +#endif + + /* + * Limit the MTU to make sure the ethernet packets are between + * 64 bytes and 65535 bytes. + */ + if ((new_mtu + 14 + 4 + vlan_bytes < 64) + || (new_mtu + 14 + 4 + vlan_bytes > 65392)) { + pr_err("MTU must be between %d and %d.\n", + 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes); + return -EINVAL; + } + dev->mtu = new_mtu; + + if ((interface < 2) + && (cvmx_helper_interface_get_mode(interface) != + CVMX_HELPER_INTERFACE_MODE_SPI)) { + /* Add ethernet header and FCS, and VLAN if configured. */ + int max_packet = new_mtu + 14 + 4 + vlan_bytes; + + if (OCTEON_IS_MODEL(OCTEON_CN3XXX) + || OCTEON_IS_MODEL(OCTEON_CN58XX)) { + /* Signal errors on packets larger than the MTU */ + cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface), + max_packet); + } else { + /* + * Set the hardware to truncate packets larger + * than the MTU and smaller the 64 bytes. + */ + union cvmx_pip_frm_len_chkx frm_len_chk; + frm_len_chk.u64 = 0; + frm_len_chk.s.minlen = 64; + frm_len_chk.s.maxlen = max_packet; + cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface), + frm_len_chk.u64); + } + /* + * Set the hardware to truncate packets larger than + * the MTU. The jabber register must be set to a + * multiple of 8 bytes, so round up. + */ + cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface), + (max_packet + 7) & ~7u); + } + return 0; +} + +/** + * Per network device initialization + * + * @dev: Device to initialize + * Returns Zero on success + */ +int cvm_oct_common_init(struct net_device *dev) +{ + static int count; + char mac[8] = { 0x00, 0x00, + octeon_bootinfo->mac_addr_base[0], + octeon_bootinfo->mac_addr_base[1], + octeon_bootinfo->mac_addr_base[2], + octeon_bootinfo->mac_addr_base[3], + octeon_bootinfo->mac_addr_base[4], + octeon_bootinfo->mac_addr_base[5] + count + }; + struct octeon_ethernet *priv = netdev_priv(dev); + + /* + * Force the interface to use the POW send if always_use_pow + * was specified or it is in the pow send list. + */ + if ((pow_send_group != -1) + && (always_use_pow || strstr(pow_send_list, dev->name))) + priv->queue = -1; + + if (priv->queue != -1) { + dev->hard_start_xmit = cvm_oct_xmit; + if (USE_HW_TCPUDP_CHECKSUM) + dev->features |= NETIF_F_IP_CSUM; + } else + dev->hard_start_xmit = cvm_oct_xmit_pow; + count++; + + dev->get_stats = cvm_oct_common_get_stats; + dev->set_mac_address = cvm_oct_common_set_mac_address; + dev->set_multicast_list = cvm_oct_common_set_multicast_list; + dev->change_mtu = cvm_oct_common_change_mtu; + dev->do_ioctl = cvm_oct_ioctl; + /* We do our own locking, Linux doesn't need to */ + dev->features |= NETIF_F_LLTX; + SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops); +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = cvm_oct_poll_controller; +#endif + + cvm_oct_mdio_setup_device(dev); + dev->set_mac_address(dev, mac); + dev->change_mtu(dev, dev->mtu); + + /* + * Zero out stats for port so we won't mistakenly show + * counters from the bootloader. + */ + memset(dev->get_stats(dev), 0, sizeof(struct net_device_stats)); + + return 0; +} + +void cvm_oct_common_uninit(struct net_device *dev) +{ + /* Currently nothing to do */ +} |