U-Boot

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2018-2022 Marvell International Ltd.
 *
 * Functions for LOOP initialization, configuration,
 * and monitoring.
 */

#include <log.h>
#include <malloc.h>
#include <net.h>
#include <linux/delay.h>

#include <mach/cvmx-regs.h>
#include <mach/cvmx-csr.h>
#include <mach/cvmx-bootmem.h>
#include <mach/octeon-model.h>
#include <mach/octeon_fdt.h>
#include <mach/cvmx-helper.h>
#include <mach/cvmx-helper-board.h>
#include <mach/cvmx-helper-cfg.h>
#include <mach/cvmx-helper-fdt.h>
#include <mach/cvmx-helper-gpio.h>

#include <mach/cvmx-agl-defs.h>
#include <mach/cvmx-bgxx-defs.h>
#include <mach/cvmx-ciu-defs.h>
#include <mach/cvmx-gmxx-defs.h>
#include <mach/cvmx-gserx-defs.h>
#include <mach/cvmx-ilk-defs.h>
#include <mach/cvmx-ipd-defs.h>
#include <mach/cvmx-lbk-defs.h>
#include <mach/cvmx-pcsx-defs.h>
#include <mach/cvmx-pcsxx-defs.h>
#include <mach/cvmx-pki-defs.h>
#include <mach/cvmx-pko-defs.h>
#include <mach/cvmx-xcv-defs.h>

#include <mach/cvmx-hwpko.h>
#include <mach/cvmx-ilk.h>
#include <mach/cvmx-pki.h>

int __cvmx_helper_loop_enumerate(int xiface)
{
	return OCTEON_IS_MODEL(OCTEON_CN68XX) ?
		       8 : (OCTEON_IS_MODEL(OCTEON_CNF71XX) ? 2 : 4);
}

/**
 * @INTERNAL
 * Probe a LOOP interface and determine the number of ports
 * connected to it. The LOOP interface should still be down
 * after this call.
 *
 * @param xiface Interface to probe
 *
 * @return Number of ports on the interface. Zero to disable.
 */
int __cvmx_helper_loop_probe(int xiface)
{
	return __cvmx_helper_loop_enumerate(xiface);
}

/**
 * @INTERNAL
 * Bringup and enable a LOOP interface. After this call packet
 * I/O should be fully functional. This is called with IPD
 * enabled but PKO disabled.
 *
 * @param interface to bring up
 *
 * @return Zero on success, negative on failure
 */
int __cvmx_helper_loop_enable(int xiface)
{
	cvmx_pip_prt_cfgx_t port_cfg;
	int num_ports, index;
	unsigned long offset;
	struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);

	num_ports = __cvmx_helper_get_num_ipd_ports(xiface);
	/*
	 * We need to disable length checking so packet < 64 bytes and jumbo
	 * frames don't get errors
	 */
	for (index = 0; index < num_ports; index++) {
		offset = ((octeon_has_feature(OCTEON_FEATURE_PKND)) ?
				  cvmx_helper_get_pknd(xiface, index) :
					cvmx_helper_get_ipd_port(xiface, index));

		if (octeon_has_feature(OCTEON_FEATURE_PKI)) {
			cvmx_pki_endis_l2_errs(xi.node, offset, 1, 0, 0);
			cvmx_pki_endis_fcs_check(xi.node, offset, 0, 0);
		} else {
			port_cfg.u64 = csr_rd(CVMX_PIP_PRT_CFGX(offset));
			port_cfg.s.maxerr_en = 0;
			port_cfg.s.minerr_en = 0;
			csr_wr(CVMX_PIP_PRT_CFGX(offset), port_cfg.u64);
		}
	}

	/*
	 * Disable FCS stripping for loopback ports
	 */
	if (!octeon_has_feature(OCTEON_FEATURE_PKND)) {
		cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;

		ipd_sub_port_fcs.u64 = csr_rd(CVMX_IPD_SUB_PORT_FCS);
		ipd_sub_port_fcs.s.port_bit2 = 0;
		csr_wr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
	}
	/*
	 * Set PKND and BPID for loopback ports.
	 */
	if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
		cvmx_pko_reg_loopback_pkind_t lp_pknd;
		cvmx_pko_reg_loopback_bpid_t lp_bpid;

		for (index = 0; index < num_ports; index++) {
			int pknd = cvmx_helper_get_pknd(xiface, index);
			int bpid = cvmx_helper_get_bpid(xiface, index);

			lp_pknd.u64 = csr_rd(CVMX_PKO_REG_LOOPBACK_PKIND);
			lp_bpid.u64 = csr_rd(CVMX_PKO_REG_LOOPBACK_BPID);

			if (index == 0)
				lp_pknd.s.num_ports = num_ports;

			switch (index) {
			case 0:
				lp_pknd.s.pkind0 = pknd;
				lp_bpid.s.bpid0 = bpid;
				break;
			case 1:
				lp_pknd.s.pkind1 = pknd;
				lp_bpid.s.bpid1 = bpid;
				break;
			case 2:
				lp_pknd.s.pkind2 = pknd;
				lp_bpid.s.bpid2 = bpid;
				break;
			case 3:
				lp_pknd.s.pkind3 = pknd;
				lp_bpid.s.bpid3 = bpid;
				break;
			case 4:
				lp_pknd.s.pkind4 = pknd;
				lp_bpid.s.bpid4 = bpid;
				break;
			case 5:
				lp_pknd.s.pkind5 = pknd;
				lp_bpid.s.bpid5 = bpid;
				break;
			case 6:
				lp_pknd.s.pkind6 = pknd;
				lp_bpid.s.bpid6 = bpid;
				break;
			case 7:
				lp_pknd.s.pkind7 = pknd;
				lp_bpid.s.bpid7 = bpid;
				break;
			}
			csr_wr(CVMX_PKO_REG_LOOPBACK_PKIND, lp_pknd.u64);
			csr_wr(CVMX_PKO_REG_LOOPBACK_BPID, lp_bpid.u64);
		}
	} else if (octeon_has_feature(OCTEON_FEATURE_BGX)) {
		cvmx_lbk_chx_pkind_t lbk_pkind;

		for (index = 0; index < num_ports; index++) {
			lbk_pkind.u64 = 0;
			lbk_pkind.s.pkind = cvmx_helper_get_pknd(xiface, index);
			csr_wr_node(xi.node, CVMX_LBK_CHX_PKIND(index),
				    lbk_pkind.u64);
		}
	}

	return 0;
}