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freebsd-dev/sys/contrib/octeon-sdk/cvmx-helper-rgmii.c
Juli Mallett cea2b8b915 Update the port of FreeBSD to Cavium Octeon to use the Cavium Simple Executive 
library:
o) Increase inline unit / large function growth limits for MIPS to accommodate
   the needs of the Simple Executive, which uses a shocking amount of inlining.
o) Remove TARGET_OCTEON and use CPU_CNMIPS to do things required by cnMIPS and
   the Octeon SoC.
o) Add OCTEON_VENDOR_LANNER to use Lanner's allocation of vendor-specific
   board numbers, specifically to support the MR320.
o) Add OCTEON_BOARD_CAPK_0100ND to hard-wire configuration for the CAPK-0100nd,
   which improperly uses an evaluation board's board number and breaks board
   detection at runtime.  This board is sold by Portwell as the CAM-0100.
o) Add support for the RTC available on some Octeon boards.
o) Add support for the Octeon PCI bus.  Note that rman_[sg]et_virtual for IO
   ports can not work unless building for n64.
o) Clean up the CompactFlash driver to use Simple Executive macros and
   structures where possible (it would be advisable to use the Simple Executive
   API to set the PIO mode, too, but that is not done presently.)  Also use
   structures from FreeBSD's ATA layer rather than structures copied from
   Linux.
o) Print available Octeon SoC features on boot.
o) Add support for the Octeon timecounter.
o) Use the Simple Executive's routines rather than local copies for doing reads
   and writes to 64-bit addresses and use its macros for various device
   addresses rather than using local copies.
o) Rename octeon_board_real to octeon_is_simulation to reduce differences with
   Cavium-provided code originally written for Linux.  Also make it use the
   same simplified test that the Simple Executive and Linux both use rather
   than our complex one.
o) Add support for the Octeon CIU, which is the main interrupt unit, as a bus
   to use normal interrupt allocation and setup routines.
o) Use the Simple Executive's bootmem facility to allocate physical memory for
   the kernel, rather than assuming we know which addresses we can steal.
   NB: This may reduce the amount of RAM the kernel reports you as having if
       you are leaving large temporary allocations made by U-Boot allocated
       when starting FreeBSD.
o) Add a port of the Cavium-provided Ethernet driver for Linux.  This changes
   Ethernet interface naming from rgmxN to octeN.  The new driver has vast
   improvements over the old one, both in performance and functionality, but
   does still have some features which have not been ported entirely and there
   may be unimplemented code that can be hit in everyday use.  I will make
   every effort to correct those as they are reported.
o) Support loading the kernel on non-contiguous cores.
o) Add very conservative support for harvesting randomness from the Octeon
   random number device.
o) Turn SMP on by default.
o) Clean up the style of the Octeon kernel configurations a little and make
   them compile with -march=octeon.
o) Add support for the Lanner MR320 and the CAPK-0100nd to the Simple
   Executive.
o) Modify the Simple Executive to build on FreeBSD and to build without
   executive-config.h or cvmx-config.h.  In the future we may want to
   revert part of these changes and supply executive-config.h and
   cvmx-config.h and access to the options contained in those files via
   kernel configuration files.
o) Modify the Simple Executive USB routines to support getting and setting
   of the USB PID.
2010-07-20 19:25:11 +00:00

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/***********************license start***************
* Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS
* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET
* POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT
* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
*
*
* For any questions regarding licensing please contact marketing@caviumnetworks.com
*
***********************license end**************************************/
/**
* @file
*
* Functions for RGMII/GMII/MII initialization, configuration,
* and monitoring.
*
* <hr>$Revision: 42417 $<hr>
*/
#include "cvmx.h"
#include "cvmx-sysinfo.h"
#include "cvmx-mdio.h"
#include "cvmx-pko.h"
#include "cvmx-helper.h"
#include "cvmx-helper-board.h"
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* @INTERNAL
* Probe RGMII ports and determine the number present
*
* @param interface Interface to probe
*
* @return Number of RGMII/GMII/MII ports (0-4).
*/
int __cvmx_helper_rgmii_probe(int interface)
{
int num_ports = 0;
cvmx_gmxx_inf_mode_t mode;
mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
if (mode.s.type)
{
if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
{
cvmx_dprintf("ERROR: RGMII initialize called in SPI interface\n");
}
else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
{
/* On these chips "type" says we're in GMII/MII mode. This
limits us to 2 ports */
num_ports = 2;
}
else
{
cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", __FUNCTION__);
}
}
else
{
if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
{
num_ports = 4;
}
else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
{
num_ports = 3;
}
else
{
cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", __FUNCTION__);
}
}
return num_ports;
}
/**
* Put an RGMII interface in loopback mode. Internal packets sent
* out will be received back again on the same port. Externally
* received packets will echo back out.
*
* @param port IPD port number to loop.
*/
void cvmx_helper_rgmii_internal_loopback(int port)
{
int interface = (port >> 4) & 1;
int index = port & 0xf;
uint64_t tmp;
cvmx_gmxx_prtx_cfg_t gmx_cfg;
gmx_cfg.u64 = 0;
gmx_cfg.s.duplex = 1;
gmx_cfg.s.slottime = 1;
gmx_cfg.s.speed = 1;
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
tmp = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), (1 << index) | tmp);
tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), (1 << index) | tmp);
tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), (1 << index) | tmp);
gmx_cfg.s.en = 1;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
}
/**
* @INTERNAL
* Configure all of the ASX, GMX, and PKO regsiters required
* to get RGMII to function on the supplied interface.
*
* @param interface PKO Interface to configure (0 or 1)
*
* @return Zero on success
*/
int __cvmx_helper_rgmii_enable(int interface)
{
int num_ports = cvmx_helper_ports_on_interface(interface);
int port;
cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
cvmx_gmxx_inf_mode_t mode;
cvmx_asxx_tx_prt_en_t asx_tx;
cvmx_asxx_rx_prt_en_t asx_rx;
mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
if (mode.s.en == 0)
return -1;
if ((OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)) && mode.s.type == 1) /* Ignore SPI interfaces */
return -1;
/* Configure the ASX registers needed to use the RGMII ports */
asx_tx.u64 = 0;
asx_tx.s.prt_en = cvmx_build_mask(num_ports);
cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), asx_tx.u64);
asx_rx.u64 = 0;
asx_rx.s.prt_en = cvmx_build_mask(num_ports);
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), asx_rx.u64);
/* Configure the GMX registers needed to use the RGMII ports */
for (port=0; port<num_ports; port++)
{
/* Setting of CVMX_GMXX_TXX_THRESH has been moved to
__cvmx_helper_setup_gmx() */
if (cvmx_octeon_is_pass1())
__cvmx_helper_errata_asx_pass1(interface, port, sys_info_ptr->cpu_clock_hz);
else
{
/* Configure more flexible RGMII preamble checking. Pass 1 doesn't
support this feature. */
cvmx_gmxx_rxx_frm_ctl_t frm_ctl;
frm_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface));
frm_ctl.s.pre_free = 1; /* New field, so must be compile time */
cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface), frm_ctl.u64);
}
/* Each pause frame transmitted will ask for about 10M bit times
before resume. If buffer space comes available before that time
has expired, an XON pause frame (0 time) will be transmitted to
restart the flow. */
cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_TIME(port, interface), 20000);
cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_INTERVAL(port, interface), 19000);
/*
* Board types we have to know at compile-time.
*/
#if defined(OCTEON_BOARD_CAPK_0100ND)
cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), 26);
cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), 26);
#else
/*
* Vendor-defined board types.
*/
#if defined(OCTEON_VENDOR_LANNER)
switch (cvmx_sysinfo_get()->board_type) {
case CVMX_BOARD_TYPE_CUST_LANNER_MR320:
if (port == 0) {
cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), 4);
} else {
cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), 7);
}
cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), 0);
break;
}
#else
/*
* For board types we can determine at runtime.
*/
if (OCTEON_IS_MODEL(OCTEON_CN50XX))
{
cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), 16);
cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), 16);
}
else
{
cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), 24);
cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), 24);
}
#endif
#endif
}
__cvmx_helper_setup_gmx(interface, num_ports);
/* enable the ports now */
for (port=0; port<num_ports; port++)
{
cvmx_gmxx_prtx_cfg_t gmx_cfg;
cvmx_helper_link_autoconf(cvmx_helper_get_ipd_port(interface, port));
gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(port, interface));
gmx_cfg.s.en = 1;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(port, interface), gmx_cfg.u64);
}
return 0;
}
/**
* @INTERNAL
* 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().
*
* @param ipd_port IPD/PKO port to query
*
* @return Link state
*/
cvmx_helper_link_info_t __cvmx_helper_rgmii_link_get(int ipd_port)
{
int interface = cvmx_helper_get_interface_num(ipd_port);
int index = cvmx_helper_get_interface_index_num(ipd_port);
cvmx_asxx_prt_loop_t asxx_prt_loop;
asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
if (asxx_prt_loop.s.int_loop & (1<<index))
{
/* Force 1Gbps full duplex on internal loopback */
cvmx_helper_link_info_t result;
result.u64 = 0;
result.s.full_duplex = 1;
result.s.link_up = 1;
result.s.speed = 1000;
return result;
}
else
return __cvmx_helper_board_link_get(ipd_port);
}
/**
* @INTERNAL
* 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(). It is normally best to use
* cvmx_helper_link_autoconf() instead.
*
* @param ipd_port IPD/PKO port to configure
* @param link_info The new link state
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_rgmii_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
{
int result = 0;
int interface = cvmx_helper_get_interface_num(ipd_port);
int index = cvmx_helper_get_interface_index_num(ipd_port);
cvmx_gmxx_prtx_cfg_t original_gmx_cfg;
cvmx_gmxx_prtx_cfg_t new_gmx_cfg;
cvmx_pko_mem_queue_qos_t pko_mem_queue_qos;
cvmx_pko_mem_queue_qos_t pko_mem_queue_qos_save[16];
cvmx_gmxx_tx_ovr_bp_t gmx_tx_ovr_bp;
cvmx_gmxx_tx_ovr_bp_t gmx_tx_ovr_bp_save;
int i;
/* Ignore speed sets in the simulator */
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
return 0;
/* Read the current settings so we know the current enable state */
original_gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
new_gmx_cfg = original_gmx_cfg;
/* Disable the lowest level RX */
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface),
cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) & ~(1<<index));
/* Disable all queues so that TX should become idle */
for (i=0; i<cvmx_pko_get_num_queues(ipd_port); i++)
{
int queue = cvmx_pko_get_base_queue(ipd_port) + i;
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue);
pko_mem_queue_qos.u64 = cvmx_read_csr(CVMX_PKO_MEM_QUEUE_QOS);
pko_mem_queue_qos.s.pid = ipd_port;
pko_mem_queue_qos.s.qid = queue;
pko_mem_queue_qos_save[i] = pko_mem_queue_qos;
pko_mem_queue_qos.s.qos_mask = 0;
cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, pko_mem_queue_qos.u64);
}
/* Disable backpressure */
gmx_tx_ovr_bp.u64 = cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface));
gmx_tx_ovr_bp_save = gmx_tx_ovr_bp;
gmx_tx_ovr_bp.s.bp &= ~(1<<index);
gmx_tx_ovr_bp.s.en |= 1<<index;
cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp.u64);
cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface));
/* Poll the GMX state machine waiting for it to become idle. Preferably we
should only change speed when it is idle. If it doesn't become idle we
will still do the speed change, but there is a slight chance that GMX
will lockup */
cvmx_write_csr(CVMX_NPI_DBG_SELECT, interface*0x800 + index*0x100 + 0x880);
CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, cvmx_dbg_data_t, data&7, ==, 0, 10000);
CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, cvmx_dbg_data_t, data&0xf, ==, 0, 10000);
/* Disable the port before we make any changes */
new_gmx_cfg.s.en = 0;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
/* Set full/half duplex */
if (cvmx_octeon_is_pass1())
new_gmx_cfg.s.duplex = 1; /* Half duplex is broken for 38XX Pass 1 */
else if (!link_info.s.link_up)
new_gmx_cfg.s.duplex = 1; /* Force full duplex on down links */
else
new_gmx_cfg.s.duplex = link_info.s.full_duplex;
/* Set the link speed. Anything unknown is set to 1Gbps */
if (link_info.s.speed == 10)
{
new_gmx_cfg.s.slottime = 0;
new_gmx_cfg.s.speed = 0;
}
else if (link_info.s.speed == 100)
{
new_gmx_cfg.s.slottime = 0;
new_gmx_cfg.s.speed = 0;
}
else
{
new_gmx_cfg.s.slottime = 1;
new_gmx_cfg.s.speed = 1;
}
/* Adjust the clocks */
if (link_info.s.speed == 10)
{
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 50);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
}
else if (link_info.s.speed == 100)
{
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 5);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
}
else
{
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
}
if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
{
if ((link_info.s.speed == 10) || (link_info.s.speed == 100))
{
cvmx_gmxx_inf_mode_t mode;
mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
/*
** Port .en .type .p0mii Configuration
** ---- --- ----- ------ -----------------------------------------
** X 0 X X All links are disabled.
** 0 1 X 0 Port 0 is RGMII
** 0 1 X 1 Port 0 is MII
** 1 1 0 X Ports 1 and 2 are configured as RGMII ports.
** 1 1 1 X Port 1: GMII/MII; Port 2: disabled. GMII or
** MII port is selected by GMX_PRT1_CFG[SPEED].
*/
/* In MII mode, CLK_CNT = 1. */
if (((index == 0) && (mode.s.p0mii == 1)) || ((index != 0) && (mode.s.type == 1)))
{
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
}
}
}
/* Do a read to make sure all setup stuff is complete */
cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
/* Save the new GMX setting without enabling the port */
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
/* Enable the lowest level RX */
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface),
cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) | (1<<index));
/* Re-enable the TX path */
for (i=0; i<cvmx_pko_get_num_queues(ipd_port); i++)
{
int queue = cvmx_pko_get_base_queue(ipd_port) + i;
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue);
cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, pko_mem_queue_qos_save[i].u64);
}
/* Restore backpressure */
cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp_save.u64);
/* Restore the GMX enable state. Port config is complete */
new_gmx_cfg.s.en = original_gmx_cfg.s.en;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
return result;
}
/**
* @INTERNAL
* 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.
*
* @param ipd_port IPD/PKO port to loopback.
* @param enable_internal
* Non zero if you want internal loopback
* @param enable_external
* Non zero if you want external loopback
*
* @return Zero on success, negative on failure.
*/
int __cvmx_helper_rgmii_configure_loopback(int ipd_port, int enable_internal, int enable_external)
{
int interface = cvmx_helper_get_interface_num(ipd_port);
int index = cvmx_helper_get_interface_index_num(ipd_port);
int original_enable;
cvmx_gmxx_prtx_cfg_t gmx_cfg;
cvmx_asxx_prt_loop_t asxx_prt_loop;
/* Read the current enable state and save it */
gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
original_enable = gmx_cfg.s.en;
/* Force port to be disabled */
gmx_cfg.s.en = 0;
if (enable_internal)
{
/* Force speed if we're doing internal loopback */
gmx_cfg.s.duplex = 1;
gmx_cfg.s.slottime = 1;
gmx_cfg.s.speed = 1;
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
}
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
/* Set the loopback bits */
asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
if (enable_internal)
asxx_prt_loop.s.int_loop |= 1<<index;
else
asxx_prt_loop.s.int_loop &= ~(1<<index);
if (enable_external)
asxx_prt_loop.s.ext_loop |= 1<<index;
else
asxx_prt_loop.s.ext_loop &= ~(1<<index);
cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), asxx_prt_loop.u64);
/* Force enables in internal loopback */
if (enable_internal)
{
uint64_t tmp;
tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), (1 << index) | tmp);
tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), (1 << index) | tmp);
original_enable = 1;
}
/* Restore the enable state */
gmx_cfg.s.en = original_enable;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
return 0;
}
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
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