| /***********************license start*************** |
| * Author: Cavium Networks |
| * |
| * Contact: support@caviumnetworks.com |
| * This file is part of the OCTEON SDK |
| * |
| * Copyright (C) 2003-2018 Cavium, Inc. |
| * |
| * 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 |
| ***********************license end**************************************/ |
| |
| /* |
| * Functions for XAUI initialization, configuration, |
| * and monitoring. |
| * |
| */ |
| |
| #include <asm/octeon/octeon.h> |
| |
| #include <asm/octeon/cvmx-config.h> |
| |
| #include <asm/octeon/cvmx-helper.h> |
| |
| #include <asm/octeon/cvmx-pko-defs.h> |
| #include <asm/octeon/cvmx-gmxx-defs.h> |
| #include <asm/octeon/cvmx-pcsx-defs.h> |
| #include <asm/octeon/cvmx-pcsxx-defs.h> |
| |
| int __cvmx_helper_xaui_enumerate(int interface) |
| { |
| union cvmx_gmxx_hg2_control gmx_hg2_control; |
| |
| /* If HiGig2 is enabled return 16 ports, otherwise return 1 port */ |
| gmx_hg2_control.u64 = cvmx_read_csr(CVMX_GMXX_HG2_CONTROL(interface)); |
| if (gmx_hg2_control.s.hg2tx_en) |
| return 16; |
| else |
| return 1; |
| } |
| |
| /* |
| * Probe a XAUI interface and determine the number of ports |
| * connected to it. The XAUI interface should still be down |
| * after this call. |
| * |
| * @interface: Interface to probe |
| * |
| * Returns Number of ports on the interface. Zero to disable. |
| */ |
| int __cvmx_helper_xaui_probe(int interface) |
| { |
| int i; |
| union cvmx_gmxx_inf_mode mode; |
| |
| /* |
| * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the |
| * interface needs to be enabled before IPD otherwise per port |
| * backpressure may not work properly. |
| */ |
| mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); |
| mode.s.en = 1; |
| cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64); |
| |
| __cvmx_helper_setup_gmx(interface, 1); |
| |
| /* |
| * Setup PKO to support 16 ports for HiGig2 virtual |
| * ports. We're pointing all of the PKO packet ports for this |
| * interface to the XAUI. This allows us to use HiGig2 |
| * backpressure per port. |
| */ |
| for (i = 0; i < 16; i++) { |
| union cvmx_pko_mem_port_ptrs pko_mem_port_ptrs; |
| pko_mem_port_ptrs.u64 = 0; |
| /* |
| * We set each PKO port to have equal priority in a |
| * round robin fashion. |
| */ |
| pko_mem_port_ptrs.s.static_p = 0; |
| pko_mem_port_ptrs.s.qos_mask = 0xff; |
| /* All PKO ports map to the same XAUI hardware port */ |
| pko_mem_port_ptrs.s.eid = interface * 4; |
| pko_mem_port_ptrs.s.pid = interface * 16 + i; |
| cvmx_write_csr(CVMX_PKO_MEM_PORT_PTRS, pko_mem_port_ptrs.u64); |
| } |
| return __cvmx_helper_xaui_enumerate(interface); |
| } |
| |
| /* |
| * Bringup and enable a XAUI interface. After this call packet |
| * I/O should be fully functional. This is called with IPD |
| * enabled but PKO disabled. |
| * |
| * @interface: Interface to bring up |
| * |
| * Returns Zero on success, negative on failure |
| */ |
| int __cvmx_helper_xaui_enable(int interface) |
| { |
| union cvmx_gmxx_prtx_cfg gmx_cfg; |
| union cvmx_pcsxx_control1_reg xauiCtl; |
| union cvmx_pcsxx_misc_ctl_reg xauiMiscCtl; |
| union cvmx_gmxx_tx_xaui_ctl gmxXauiTxCtl; |
| union cvmx_gmxx_rxx_int_en gmx_rx_int_en; |
| union cvmx_gmxx_tx_int_en gmx_tx_int_en; |
| union cvmx_pcsxx_int_en_reg pcsx_int_en_reg; |
| |
| /* Setup PKND */ |
| if (octeon_has_feature(OCTEON_FEATURE_PKND)) { |
| gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); |
| gmx_cfg.s.pknd = cvmx_helper_get_ipd_port(interface, 0); |
| cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); |
| } |
| |
| /* (1) Interface has already been enabled. */ |
| |
| /* (2) Disable GMX. */ |
| xauiMiscCtl.u64 = cvmx_read_csr(CVMX_PCSXX_MISC_CTL_REG(interface)); |
| xauiMiscCtl.s.gmxeno = 1; |
| cvmx_write_csr(CVMX_PCSXX_MISC_CTL_REG(interface), xauiMiscCtl.u64); |
| |
| /* (3) Disable GMX and PCSX interrupts. */ |
| gmx_rx_int_en.u64 = cvmx_read_csr(CVMX_GMXX_RXX_INT_EN(0, interface)); |
| cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0); |
| gmx_tx_int_en.u64 = cvmx_read_csr(CVMX_GMXX_TX_INT_EN(interface)); |
| cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), 0x0); |
| pcsx_int_en_reg.u64 = cvmx_read_csr(CVMX_PCSXX_INT_EN_REG(interface)); |
| cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), 0x0); |
| |
| /* (4) Bring up the PCSX and GMX reconciliation layer. */ |
| /* (4)a Set polarity and lane swapping. */ |
| /* (4)b */ |
| gmxXauiTxCtl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); |
| /* Enable better IFG packing and improves performance */ |
| gmxXauiTxCtl.s.dic_en = 1; |
| gmxXauiTxCtl.s.uni_en = 0; |
| cvmx_write_csr(CVMX_GMXX_TX_XAUI_CTL(interface), gmxXauiTxCtl.u64); |
| |
| /* (4)c Aply reset sequence */ |
| xauiCtl.u64 = cvmx_read_csr(CVMX_PCSXX_CONTROL1_REG(interface)); |
| xauiCtl.s.lo_pwr = 0; |
| |
| /* Issuing a reset here seems to hang some CN66XX/CN68XX chips. */ |
| if (!OCTEON_IS_MODEL(OCTEON_CN66XX) && |
| !OCTEON_IS_MODEL(OCTEON_CN68XX_PASS1_X) && |
| !OCTEON_IS_MODEL(OCTEON_CN68XX_PASS2_X)) |
| xauiCtl.s.reset = 1; |
| |
| cvmx_write_csr(CVMX_PCSXX_CONTROL1_REG(interface), xauiCtl.u64); |
| |
| /* Wait for PCS to come out of reset */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_PCSXX_CONTROL1_REG(interface), union cvmx_pcsxx_control1_reg, |
| reset, ==, 0, 10000)) |
| return -1; |
| /* Wait for PCS to be aligned */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_PCSXX_10GBX_STATUS_REG(interface), |
| union cvmx_pcsxx_10gbx_status_reg, alignd, ==, 1, 10000)) |
| return -1; |
| /* Wait for RX to be ready */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_GMXX_RX_XAUI_CTL(interface), union cvmx_gmxx_rx_xaui_ctl, |
| status, ==, 0, 10000)) |
| return -1; |
| |
| /* (6) Configure GMX */ |
| gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); |
| gmx_cfg.s.en = 0; |
| cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); |
| |
| /* Wait for GMX RX to be idle */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_GMXX_PRTX_CFG(0, interface), union cvmx_gmxx_prtx_cfg, |
| rx_idle, ==, 1, 10000)) |
| return -1; |
| /* Wait for GMX TX to be idle */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_GMXX_PRTX_CFG(0, interface), union cvmx_gmxx_prtx_cfg, |
| tx_idle, ==, 1, 10000)) |
| return -1; |
| |
| /* GMX configure */ |
| gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); |
| gmx_cfg.s.speed = 1; |
| gmx_cfg.s.speed_msb = 0; |
| gmx_cfg.s.slottime = 1; |
| cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), 1); |
| cvmx_write_csr(CVMX_GMXX_TXX_SLOT(0, interface), 512); |
| cvmx_write_csr(CVMX_GMXX_TXX_BURST(0, interface), 8192); |
| cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); |
| |
| /* (7) Clear out any error state */ |
| cvmx_write_csr(CVMX_GMXX_RXX_INT_REG(0, interface), |
| cvmx_read_csr(CVMX_GMXX_RXX_INT_REG(0, interface))); |
| cvmx_write_csr(CVMX_GMXX_TX_INT_REG(interface), |
| cvmx_read_csr(CVMX_GMXX_TX_INT_REG(interface))); |
| cvmx_write_csr(CVMX_PCSXX_INT_REG(interface), |
| cvmx_read_csr(CVMX_PCSXX_INT_REG(interface))); |
| |
| /* Wait for receive link */ |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_PCSXX_STATUS1_REG(interface), union cvmx_pcsxx_status1_reg, |
| rcv_lnk, ==, 1, 10000)) |
| return -1; |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_PCSXX_STATUS2_REG(interface), union cvmx_pcsxx_status2_reg, |
| xmtflt, ==, 0, 10000)) |
| return -1; |
| if (CVMX_WAIT_FOR_FIELD64 |
| (CVMX_PCSXX_STATUS2_REG(interface), union cvmx_pcsxx_status2_reg, |
| rcvflt, ==, 0, 10000)) |
| return -1; |
| |
| cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), gmx_rx_int_en.u64); |
| cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), gmx_tx_int_en.u64); |
| cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), pcsx_int_en_reg.u64); |
| |
| /* (8) Enable packet reception */ |
| xauiMiscCtl.s.gmxeno = 0; |
| cvmx_write_csr(CVMX_PCSXX_MISC_CTL_REG(interface), xauiMiscCtl.u64); |
| |
| gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); |
| gmx_cfg.s.en = 1; |
| cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); |
| |
| __cvmx_interrupt_pcsx_intx_en_reg_enable(0, interface); |
| __cvmx_interrupt_pcsx_intx_en_reg_enable(1, interface); |
| __cvmx_interrupt_pcsx_intx_en_reg_enable(2, interface); |
| __cvmx_interrupt_pcsx_intx_en_reg_enable(3, interface); |
| __cvmx_interrupt_pcsxx_int_en_reg_enable(interface); |
| __cvmx_interrupt_gmxx_enable(interface); |
| |
| return 0; |
| } |
| |
| /* |
| * Return the link state of an IPD/PKO port as returned by |
| * auto negotiation. The result of this function may not match |
| * Octeon's link config if auto negotiation has changed since |
| * the last call to cvmx_helper_link_set(). |
| * |
| * @ipd_port: IPD/PKO port to query |
| * |
| * Returns Link state |
| */ |
| union cvmx_helper_link_info __cvmx_helper_xaui_link_get(int ipd_port) |
| { |
| int interface = cvmx_helper_get_interface_num(ipd_port); |
| union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl; |
| union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl; |
| union cvmx_pcsxx_status1_reg pcsxx_status1_reg; |
| union cvmx_helper_link_info result; |
| |
| gmxx_tx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); |
| gmxx_rx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RX_XAUI_CTL(interface)); |
| pcsxx_status1_reg.u64 = |
| cvmx_read_csr(CVMX_PCSXX_STATUS1_REG(interface)); |
| result.u64 = 0; |
| |
| /* Only return a link if both RX and TX are happy */ |
| if ((gmxx_tx_xaui_ctl.s.ls == 0) && (gmxx_rx_xaui_ctl.s.status == 0) && |
| (pcsxx_status1_reg.s.rcv_lnk == 1)) { |
| result.s.link_up = 1; |
| result.s.full_duplex = 1; |
| result.s.speed = 10000; |
| } else { |
| /* Disable GMX and PCSX interrupts. */ |
| cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0); |
| cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), 0x0); |
| cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), 0x0); |
| } |
| return result; |
| } |
| |
| /* |
| * Configure an IPD/PKO port for the specified link state. This |
| * function does not influence auto negotiation at the PHY level. |
| * The passed link state must always match the link state returned |
| * by cvmx_helper_link_get(). |
| * |
| * @ipd_port: IPD/PKO port to configure |
| * @link_info: The new link state |
| * |
| * Returns Zero on success, negative on failure |
| */ |
| int __cvmx_helper_xaui_link_set(int ipd_port, union cvmx_helper_link_info link_info) |
| { |
| int interface = cvmx_helper_get_interface_num(ipd_port); |
| union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl; |
| union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl; |
| |
| gmxx_tx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); |
| gmxx_rx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RX_XAUI_CTL(interface)); |
| |
| /* If the link shouldn't be up, then just return */ |
| if (!link_info.s.link_up) |
| return 0; |
| |
| /* Do nothing if both RX and TX are happy */ |
| if ((gmxx_tx_xaui_ctl.s.ls == 0) && (gmxx_rx_xaui_ctl.s.status == 0)) |
| return 0; |
| |
| /* Bring the link up */ |
| return __cvmx_helper_xaui_enable(interface); |
| } |
