diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet.c | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/drivers/staging/octeon/ethernet.c b/drivers/staging/octeon/ethernet.c new file mode 100644 index 00000000000..b8479517dce --- /dev/null +++ b/drivers/staging/octeon/ethernet.c @@ -0,0 +1,861 @@ +/********************************************************************** + * 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/init.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/mii.h> + +#include <net/dst.h> + +#include <asm/octeon/octeon.h> + +#include "ethernet-defines.h" +#include "octeon-ethernet.h" +#include "ethernet-mem.h" +#include "ethernet-rx.h" +#include "ethernet-tx.h" +#include "ethernet-mdio.h" +#include "ethernet-util.h" +#include "ethernet-proc.h" + + +#include "cvmx-pip.h" +#include "cvmx-pko.h" +#include "cvmx-fau.h" +#include "cvmx-ipd.h" +#include "cvmx-helper.h" + +#include "cvmx-gmxx-defs.h" +#include "cvmx-smix-defs.h" + +#if defined(CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS) \ + && CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS +int num_packet_buffers = CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS; +#else +int num_packet_buffers = 1024; +#endif +module_param(num_packet_buffers, int, 0444); +MODULE_PARM_DESC(num_packet_buffers, "\n" + "\tNumber of packet buffers to allocate and store in the\n" + "\tFPA. By default, 1024 packet buffers are used unless\n" + "\tCONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS is defined."); + +int pow_receive_group = 15; +module_param(pow_receive_group, int, 0444); +MODULE_PARM_DESC(pow_receive_group, "\n" + "\tPOW group to receive packets from. All ethernet hardware\n" + "\twill be configured to send incomming packets to this POW\n" + "\tgroup. Also any other software can submit packets to this\n" + "\tgroup for the kernel to process."); + +int pow_send_group = -1; +module_param(pow_send_group, int, 0644); +MODULE_PARM_DESC(pow_send_group, "\n" + "\tPOW group to send packets to other software on. This\n" + "\tcontrols the creation of the virtual device pow0.\n" + "\talways_use_pow also depends on this value."); + +int always_use_pow; +module_param(always_use_pow, int, 0444); +MODULE_PARM_DESC(always_use_pow, "\n" + "\tWhen set, always send to the pow group. This will cause\n" + "\tpackets sent to real ethernet devices to be sent to the\n" + "\tPOW group instead of the hardware. Unless some other\n" + "\tapplication changes the config, packets will still be\n" + "\treceived from the low level hardware. Use this option\n" + "\tto allow a CVMX app to intercept all packets from the\n" + "\tlinux kernel. You must specify pow_send_group along with\n" + "\tthis option."); + +char pow_send_list[128] = ""; +module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444); +MODULE_PARM_DESC(pow_send_list, "\n" + "\tComma separated list of ethernet devices that should use the\n" + "\tPOW for transmit instead of the actual ethernet hardware. This\n" + "\tis a per port version of always_use_pow. always_use_pow takes\n" + "\tprecedence over this list. For example, setting this to\n" + "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n" + "\tusing the pow_send_group."); + +static int disable_core_queueing = 1; +module_param(disable_core_queueing, int, 0444); +MODULE_PARM_DESC(disable_core_queueing, "\n" + "\tWhen set the networking core's tx_queue_len is set to zero. This\n" + "\tallows packets to be sent without lock contention in the packet\n" + "\tscheduler resulting in some cases in improved throughput.\n"); + +/** + * Periodic timer to check auto negotiation + */ +static struct timer_list cvm_oct_poll_timer; + +/** + * Array of every ethernet device owned by this driver indexed by + * the ipd input port number. + */ +struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS]; + +extern struct semaphore mdio_sem; + +/** + * Periodic timer tick for slow management operations + * + * @arg: Device to check + */ +static void cvm_do_timer(unsigned long arg) +{ + int32_t skb_to_free, undo; + int queues_per_port; + int qos; + struct octeon_ethernet *priv; + static int port; + + if (port >= CVMX_PIP_NUM_INPUT_PORTS) { + /* + * All ports have been polled. Start the next + * iteration through the ports in one second. + */ + port = 0; + mod_timer(&cvm_oct_poll_timer, jiffies + HZ); + return; + } + if (!cvm_oct_device[port]) + goto out; + + priv = netdev_priv(cvm_oct_device[port]); + if (priv->poll) { + /* skip polling if we don't get the lock */ + if (!down_trylock(&mdio_sem)) { + priv->poll(cvm_oct_device[port]); + up(&mdio_sem); + } + } + + queues_per_port = cvmx_pko_get_num_queues(port); + /* Drain any pending packets in the free list */ + for (qos = 0; qos < queues_per_port; qos++) { + if (skb_queue_len(&priv->tx_free_list[qos]) == 0) + continue; + skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4, + MAX_SKB_TO_FREE); + undo = skb_to_free > 0 ? + MAX_SKB_TO_FREE : skb_to_free + MAX_SKB_TO_FREE; + if (undo > 0) + cvmx_fau_atomic_add32(priv->fau+qos*4, -undo); + skb_to_free = -skb_to_free > MAX_SKB_TO_FREE ? + MAX_SKB_TO_FREE : -skb_to_free; + cvm_oct_free_tx_skbs(priv, skb_to_free, qos, 1); + } + cvm_oct_device[port]->netdev_ops->ndo_get_stats(cvm_oct_device[port]); + +out: + port++; + /* Poll the next port in a 50th of a second. + This spreads the polling of ports out a little bit */ + mod_timer(&cvm_oct_poll_timer, jiffies + HZ / 50); +} + +/** + * Configure common hardware for all interfaces + */ +static __init void cvm_oct_configure_common_hw(void) +{ + int r; + /* Setup the FPA */ + cvmx_fpa_enable(); + cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, + num_packet_buffers); + cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, + num_packet_buffers); + if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) + cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, + CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128); + + if (USE_RED) + cvmx_helper_setup_red(num_packet_buffers / 4, + num_packet_buffers / 8); + + /* Enable the MII interface */ + if (!octeon_is_simulation()) + cvmx_write_csr(CVMX_SMIX_EN(0), 1); + + /* Register an IRQ hander for to receive POW interrupts */ + r = request_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, + cvm_oct_do_interrupt, IRQF_SHARED, "Ethernet", + cvm_oct_device); + +#if defined(CONFIG_SMP) && 0 + if (USE_MULTICORE_RECEIVE) { + irq_set_affinity(OCTEON_IRQ_WORKQ0 + pow_receive_group, + cpu_online_mask); + } +#endif +} + +/** + * Free a work queue entry received in a intercept callback. + * + * @work_queue_entry: + * Work queue entry to free + * Returns Zero on success, Negative on failure. + */ +int cvm_oct_free_work(void *work_queue_entry) +{ + cvmx_wqe_t *work = work_queue_entry; + + int segments = work->word2.s.bufs; + union cvmx_buf_ptr segment_ptr = work->packet_ptr; + + while (segments--) { + union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *) + cvmx_phys_to_ptr(segment_ptr.s.addr - 8); + if (unlikely(!segment_ptr.s.i)) + cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr), + segment_ptr.s.pool, + DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE / + 128)); + segment_ptr = next_ptr; + } + cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1)); + + return 0; +} +EXPORT_SYMBOL(cvm_oct_free_work); + +/** + * 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; +} + +/** + * 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; +} + +/** + * 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; +} + +/** + * 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 && USE_HW_TCPUDP_CHECKSUM) + dev->features |= NETIF_F_IP_CSUM; + + count++; + + /* We do our own locking, Linux doesn't need to */ + dev->features |= NETIF_F_LLTX; + SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops); + + cvm_oct_mdio_setup_device(dev); + dev->netdev_ops->ndo_set_mac_address(dev, mac); + dev->netdev_ops->ndo_change_mtu(dev, dev->mtu); + + /* + * Zero out stats for port so we won't mistakenly show + * counters from the bootloader. + */ + memset(dev->netdev_ops->ndo_get_stats(dev), 0, + sizeof(struct net_device_stats)); + + return 0; +} + +void cvm_oct_common_uninit(struct net_device *dev) +{ + /* Currently nothing to do */ +} + +static const struct net_device_ops cvm_oct_npi_netdev_ops = { + .ndo_init = cvm_oct_common_init, + .ndo_uninit = cvm_oct_common_uninit, + .ndo_start_xmit = cvm_oct_xmit, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; +static const struct net_device_ops cvm_oct_xaui_netdev_ops = { + .ndo_init = cvm_oct_xaui_init, + .ndo_uninit = cvm_oct_xaui_uninit, + .ndo_open = cvm_oct_xaui_open, + .ndo_stop = cvm_oct_xaui_stop, + .ndo_start_xmit = cvm_oct_xmit, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; +static const struct net_device_ops cvm_oct_sgmii_netdev_ops = { + .ndo_init = cvm_oct_sgmii_init, + .ndo_uninit = cvm_oct_sgmii_uninit, + .ndo_open = cvm_oct_sgmii_open, + .ndo_stop = cvm_oct_sgmii_stop, + .ndo_start_xmit = cvm_oct_xmit, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; +static const struct net_device_ops cvm_oct_spi_netdev_ops = { + .ndo_init = cvm_oct_spi_init, + .ndo_uninit = cvm_oct_spi_uninit, + .ndo_start_xmit = cvm_oct_xmit, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; +static const struct net_device_ops cvm_oct_rgmii_netdev_ops = { + .ndo_init = cvm_oct_rgmii_init, + .ndo_uninit = cvm_oct_rgmii_uninit, + .ndo_open = cvm_oct_rgmii_open, + .ndo_stop = cvm_oct_rgmii_stop, + .ndo_start_xmit = cvm_oct_xmit, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; +static const struct net_device_ops cvm_oct_pow_netdev_ops = { + .ndo_init = cvm_oct_common_init, + .ndo_start_xmit = cvm_oct_xmit_pow, + .ndo_set_multicast_list = cvm_oct_common_set_multicast_list, + .ndo_set_mac_address = cvm_oct_common_set_mac_address, + .ndo_do_ioctl = cvm_oct_ioctl, + .ndo_change_mtu = cvm_oct_common_change_mtu, + .ndo_get_stats = cvm_oct_common_get_stats, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cvm_oct_poll_controller, +#endif +}; + +/** + * Module/ driver initialization. Creates the linux network + * devices. + * + * Returns Zero on success + */ +static int __init cvm_oct_init_module(void) +{ + int num_interfaces; + int interface; + int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE; + int qos; + + pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION); + + cvm_oct_proc_initialize(); + cvm_oct_rx_initialize(); + cvm_oct_configure_common_hw(); + + cvmx_helper_initialize_packet_io_global(); + + /* Change the input group for all ports before input is enabled */ + num_interfaces = cvmx_helper_get_number_of_interfaces(); + for (interface = 0; interface < num_interfaces; interface++) { + int num_ports = cvmx_helper_ports_on_interface(interface); + int port; + + for (port = cvmx_helper_get_ipd_port(interface, 0); + port < cvmx_helper_get_ipd_port(interface, num_ports); + port++) { + union cvmx_pip_prt_tagx pip_prt_tagx; + pip_prt_tagx.u64 = + cvmx_read_csr(CVMX_PIP_PRT_TAGX(port)); + pip_prt_tagx.s.grp = pow_receive_group; + cvmx_write_csr(CVMX_PIP_PRT_TAGX(port), + pip_prt_tagx.u64); + } + } + + cvmx_helper_ipd_and_packet_input_enable(); + + memset(cvm_oct_device, 0, sizeof(cvm_oct_device)); + + /* + * Initialize the FAU used for counting packet buffers that + * need to be freed. + */ + cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0); + + if ((pow_send_group != -1)) { + struct net_device *dev; + pr_info("\tConfiguring device for POW only access\n"); + dev = alloc_etherdev(sizeof(struct octeon_ethernet)); + if (dev) { + /* Initialize the device private structure. */ + struct octeon_ethernet *priv = netdev_priv(dev); + memset(priv, 0, sizeof(struct octeon_ethernet)); + + dev->netdev_ops = &cvm_oct_pow_netdev_ops; + priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED; + priv->port = CVMX_PIP_NUM_INPUT_PORTS; + priv->queue = -1; + strcpy(dev->name, "pow%d"); + for (qos = 0; qos < 16; qos++) + skb_queue_head_init(&priv->tx_free_list[qos]); + + if (register_netdev(dev) < 0) { + pr_err("Failed to register ethernet " + "device for POW\n"); + kfree(dev); + } else { + cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev; + pr_info("%s: POW send group %d, receive " + "group %d\n", + dev->name, pow_send_group, + pow_receive_group); + } + } else { + pr_err("Failed to allocate ethernet device " + "for POW\n"); + } + } + + num_interfaces = cvmx_helper_get_number_of_interfaces(); + for (interface = 0; interface < num_interfaces; interface++) { + cvmx_helper_interface_mode_t imode = + cvmx_helper_interface_get_mode(interface); + int num_ports = cvmx_helper_ports_on_interface(interface); + int port; + + for (port = cvmx_helper_get_ipd_port(interface, 0); + port < cvmx_helper_get_ipd_port(interface, num_ports); + port++) { + struct octeon_ethernet *priv; + struct net_device *dev = + alloc_etherdev(sizeof(struct octeon_ethernet)); + if (!dev) { + pr_err("Failed to allocate ethernet device " + "for port %d\n", port); + continue; + } + if (disable_core_queueing) + dev->tx_queue_len = 0; + + /* Initialize the device private structure. */ + priv = netdev_priv(dev); + memset(priv, 0, sizeof(struct octeon_ethernet)); + + priv->imode = imode; + priv->port = port; + priv->queue = cvmx_pko_get_base_queue(priv->port); + priv->fau = fau - cvmx_pko_get_num_queues(port) * 4; + for (qos = 0; qos < 16; qos++) + skb_queue_head_init(&priv->tx_free_list[qos]); + for (qos = 0; qos < cvmx_pko_get_num_queues(port); + qos++) + cvmx_fau_atomic_write32(priv->fau + qos * 4, 0); + + switch (priv->imode) { + + /* These types don't support ports to IPD/PKO */ + case CVMX_HELPER_INTERFACE_MODE_DISABLED: + case CVMX_HELPER_INTERFACE_MODE_PCIE: + case CVMX_HELPER_INTERFACE_MODE_PICMG: + break; + + case CVMX_HELPER_INTERFACE_MODE_NPI: + dev->netdev_ops = &cvm_oct_npi_netdev_ops; + strcpy(dev->name, "npi%d"); + break; + + case CVMX_HELPER_INTERFACE_MODE_XAUI: + dev->netdev_ops = &cvm_oct_xaui_netdev_ops; + strcpy(dev->name, "xaui%d"); + break; + + case CVMX_HELPER_INTERFACE_MODE_LOOP: + dev->netdev_ops = &cvm_oct_npi_netdev_ops; + strcpy(dev->name, "loop%d"); + break; + + case CVMX_HELPER_INTERFACE_MODE_SGMII: + dev->netdev_ops = &cvm_oct_sgmii_netdev_ops; + strcpy(dev->name, "eth%d"); + break; + + case CVMX_HELPER_INTERFACE_MODE_SPI: + dev->netdev_ops = &cvm_oct_spi_netdev_ops; + strcpy(dev->name, "spi%d"); + break; + + case CVMX_HELPER_INTERFACE_MODE_RGMII: + case CVMX_HELPER_INTERFACE_MODE_GMII: + dev->netdev_ops = &cvm_oct_rgmii_netdev_ops; + strcpy(dev->name, "eth%d"); + break; + } + + if (!dev->netdev_ops) { + kfree(dev); + } else if (register_netdev(dev) < 0) { + pr_err("Failed to register ethernet device " + "for interface %d, port %d\n", + interface, priv->port); + kfree(dev); + } else { + cvm_oct_device[priv->port] = dev; + fau -= + cvmx_pko_get_num_queues(priv->port) * + sizeof(uint32_t); + } + } + } + + if (INTERRUPT_LIMIT) { + /* + * Set the POW timer rate to give an interrupt at most + * INTERRUPT_LIMIT times per second. + */ + cvmx_write_csr(CVMX_POW_WQ_INT_PC, + octeon_bootinfo->eclock_hz / (INTERRUPT_LIMIT * + 16 * 256) << 8); + + /* + * Enable POW timer interrupt. It will count when + * there are packets available. + */ + cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), + 0x1ful << 24); + } else { + /* Enable POW interrupt when our port has at least one packet */ + cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0x1001); + } + + /* Enable the poll timer for checking RGMII status */ + init_timer(&cvm_oct_poll_timer); + cvm_oct_poll_timer.data = 0; + cvm_oct_poll_timer.function = cvm_do_timer; + mod_timer(&cvm_oct_poll_timer, jiffies + HZ); + + return 0; +} + +/** + * Module / driver shutdown + * + * Returns Zero on success + */ +static void __exit cvm_oct_cleanup_module(void) +{ + int port; + + /* Disable POW interrupt */ + cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0); + + cvmx_ipd_disable(); + + /* Free the interrupt handler */ + free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device); + + del_timer(&cvm_oct_poll_timer); + cvm_oct_rx_shutdown(); + cvmx_pko_disable(); + + /* Free the ethernet devices */ + for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) { + if (cvm_oct_device[port]) { + cvm_oct_tx_shutdown(cvm_oct_device[port]); + unregister_netdev(cvm_oct_device[port]); + kfree(cvm_oct_device[port]); + cvm_oct_device[port] = NULL; + } + } + + cvmx_pko_shutdown(); + cvm_oct_proc_shutdown(); + + cvmx_ipd_free_ptr(); + + /* Free the HW pools */ + cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, + num_packet_buffers); + cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, + num_packet_buffers); + if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) + cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, + CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128); +} + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>"); +MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver."); +module_init(cvm_oct_init_module); +module_exit(cvm_oct_cleanup_module); |