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Diffstat (limited to '')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c b/arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c new file mode 100644 index 000000000..2bb6912a5 --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c @@ -0,0 +1,360 @@ +/***********************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 CN68XX chips. */ + if (!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 + */ +cvmx_helper_link_info_t __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; + cvmx_helper_link_info_t 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, cvmx_helper_link_info_t 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); +} + +/** + * Configure a port for internal and/or external loopback. Internal loopback + * causes packets sent by the port to be received by Octeon. External loopback + * causes packets received from the wire to sent out again. + * + * @ipd_port: IPD/PKO port to loopback. + * @enable_internal: + * Non zero if you want internal loopback + * @enable_external: + * Non zero if you want external loopback + * + * Returns Zero on success, negative on failure. + */ +extern int __cvmx_helper_xaui_configure_loopback(int ipd_port, + int enable_internal, + int enable_external) +{ + int interface = cvmx_helper_get_interface_num(ipd_port); + union cvmx_pcsxx_control1_reg pcsxx_control1_reg; + union cvmx_gmxx_xaui_ext_loopback gmxx_xaui_ext_loopback; + + /* Set the internal loop */ + pcsxx_control1_reg.u64 = + cvmx_read_csr(CVMX_PCSXX_CONTROL1_REG(interface)); + pcsxx_control1_reg.s.loopbck1 = enable_internal; + cvmx_write_csr(CVMX_PCSXX_CONTROL1_REG(interface), + pcsxx_control1_reg.u64); + + /* Set the external loop */ + gmxx_xaui_ext_loopback.u64 = + cvmx_read_csr(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface)); + gmxx_xaui_ext_loopback.s.en = enable_external; + cvmx_write_csr(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface), + gmxx_xaui_ext_loopback.u64); + + /* Take the link through a reset */ + return __cvmx_helper_xaui_enable(interface); +} |