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freebsd-nq/sys/contrib/octeon-sdk/cvmx-helper-srio.c
Juli Mallett 04b6fa8330 Merge Cavium Octeon SDK 2.0 Simple Executive; this brings some fixes and new 
facilities as well as support for the Octeon 2 family of SoCs.

XXX Note that with our antediluvian assembler, we can't support some Octeon 2
    instructions and fall back to using the old ones instead.
2010-11-28 08:18:16 +00:00

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/***********************license start***************
* Copyright (c) 2003-2010 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.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* 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.
***********************license end**************************************/
/**
* @file
*
* Functions for SRIO initialization, configuration,
* and monitoring.
*
* <hr>$Revision: 41586 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-clock.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-srio.h>
#include <asm/octeon/cvmx-pip-defs.h>
#include <asm/octeon/cvmx-sriox-defs.h>
#include <asm/octeon/cvmx-sriomaintx-defs.h>
#include <asm/octeon/cvmx-dpi-defs.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#include "cvmx-config.h"
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
#include "cvmx.h"
#include "cvmx-helper.h"
#include "cvmx-srio.h"
#endif
#else
#include "cvmx.h"
#include "cvmx-helper.h"
#include "cvmx-srio.h"
#endif
#endif
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* @INTERNAL
* Probe a SRIO interface and determine the number of ports
* connected to it. The SRIO interface should still be down
* after this call.
*
* @param interface Interface to probe
*
* @return Number of ports on the interface. Zero to disable.
*/
int __cvmx_helper_srio_probe(int interface)
{
cvmx_sriox_status_reg_t srio0_status_reg;
cvmx_sriox_status_reg_t srio1_status_reg;
if (!OCTEON_IS_MODEL(OCTEON_CN63XX))
return 0;
srio0_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(0));
srio1_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(1));
if (srio0_status_reg.s.srio || srio1_status_reg.s.srio)
return 2;
else
return 0;
}
/**
* @INTERNAL
* Bringup and enable SRIO interface. After this call packet
* I/O should be fully functional. This is called with IPD
* enabled but PKO disabled.
*
* @param interface Interface to bring up
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_srio_enable(int interface)
{
int num_ports = cvmx_helper_ports_on_interface(interface);
int index;
cvmx_sriomaintx_core_enables_t sriomaintx_core_enables;
cvmx_sriox_imsg_ctrl_t sriox_imsg_ctrl;
cvmx_dpi_ctl_t dpi_ctl;
/* All SRIO ports have a cvmx_srio_rx_message_header_t header
on them that must be skipped by IPD */
for (index=0; index<num_ports; index++)
{
cvmx_pip_prt_cfgx_t port_config;
cvmx_sriox_omsg_portx_t sriox_omsg_portx;
cvmx_sriox_omsg_sp_mrx_t sriox_omsg_sp_mrx;
cvmx_sriox_omsg_fmp_mrx_t sriox_omsg_fmp_mrx;
cvmx_sriox_omsg_nmp_mrx_t sriox_omsg_nmp_mrx;
int ipd_port = cvmx_helper_get_ipd_port(interface, index);
port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
/* Only change the skip if the user hasn't already set it */
if (!port_config.s.skip)
{
port_config.s.skip = sizeof(cvmx_srio_rx_message_header_t);
cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
}
/* Enable TX with PKO */
sriox_omsg_portx.u64 = cvmx_read_csr(CVMX_SRIOX_OMSG_PORTX(index, interface - 4));
sriox_omsg_portx.s.port = (interface - 4) * 2 + index;
sriox_omsg_portx.s.enable = 1;
cvmx_write_csr(CVMX_SRIOX_OMSG_PORTX(index, interface - 4), sriox_omsg_portx.u64);
/* Allow OMSG controller to send regardless of the state of any other
controller. Allow messages to different IDs and MBOXes to go in
parallel */
sriox_omsg_sp_mrx.u64 = 0;
sriox_omsg_sp_mrx.s.xmbox_sp = 1;
sriox_omsg_sp_mrx.s.ctlr_sp = 1;
sriox_omsg_sp_mrx.s.ctlr_fmp = 1;
sriox_omsg_sp_mrx.s.ctlr_nmp = 1;
sriox_omsg_sp_mrx.s.id_sp = 1;
sriox_omsg_sp_mrx.s.id_fmp = 1;
sriox_omsg_sp_mrx.s.id_nmp = 1;
sriox_omsg_sp_mrx.s.mbox_sp = 1;
sriox_omsg_sp_mrx.s.mbox_fmp = 1;
sriox_omsg_sp_mrx.s.mbox_nmp = 1;
sriox_omsg_sp_mrx.s.all_psd = 1;
cvmx_write_csr(CVMX_SRIOX_OMSG_SP_MRX(index, interface-4), sriox_omsg_sp_mrx.u64);
/* Allow OMSG controller to send regardless of the state of any other
controller. Allow messages to different IDs and MBOXes to go in
parallel */
sriox_omsg_fmp_mrx.u64 = 0;
sriox_omsg_fmp_mrx.s.ctlr_sp = 1;
sriox_omsg_fmp_mrx.s.ctlr_fmp = 1;
sriox_omsg_fmp_mrx.s.ctlr_nmp = 1;
sriox_omsg_fmp_mrx.s.id_sp = 1;
sriox_omsg_fmp_mrx.s.id_fmp = 1;
sriox_omsg_fmp_mrx.s.id_nmp = 1;
sriox_omsg_fmp_mrx.s.mbox_sp = 1;
sriox_omsg_fmp_mrx.s.mbox_fmp = 1;
sriox_omsg_fmp_mrx.s.mbox_nmp = 1;
sriox_omsg_fmp_mrx.s.all_psd = 1;
cvmx_write_csr(CVMX_SRIOX_OMSG_FMP_MRX(index, interface-4), sriox_omsg_fmp_mrx.u64);
/* Once the first part of a message is accepted, always acept the rest
of the message */
sriox_omsg_nmp_mrx.u64 = 0;
sriox_omsg_nmp_mrx.s.all_sp = 1;
sriox_omsg_nmp_mrx.s.all_fmp = 1;
sriox_omsg_nmp_mrx.s.all_nmp = 1;
cvmx_write_csr(CVMX_SRIOX_OMSG_NMP_MRX(index, interface-4), sriox_omsg_nmp_mrx.u64);
}
/* Choose the receive controller based on the mailbox */
sriox_imsg_ctrl.u64 = cvmx_read_csr(CVMX_SRIOX_IMSG_CTRL(interface - 4));
sriox_imsg_ctrl.s.prt_sel = 0;
sriox_imsg_ctrl.s.mbox = 0xa;
cvmx_write_csr(CVMX_SRIOX_IMSG_CTRL(interface - 4), sriox_imsg_ctrl.u64);
/* DPI must be enabled for us to RX messages */
dpi_ctl.u64 = cvmx_read_csr(CVMX_DPI_CTL);
dpi_ctl.s.clk = 1;
dpi_ctl.s.en = 1;
cvmx_write_csr(CVMX_DPI_CTL, dpi_ctl.u64);
/* Enable RX */
if (!cvmx_srio_config_read32(interface - 4, 0, -1, 0, 0,
CVMX_SRIOMAINTX_CORE_ENABLES(interface-4), &sriomaintx_core_enables.u32))
{
sriomaintx_core_enables.s.imsg0 = 1;
sriomaintx_core_enables.s.imsg1 = 1;
cvmx_srio_config_write32(interface - 4, 0, -1, 0, 0,
CVMX_SRIOMAINTX_CORE_ENABLES(interface-4), sriomaintx_core_enables.u32);
}
return 0;
}
/**
* @INTERNAL
* Return the link state of an IPD/PKO port as returned by SRIO link status.
*
* @param ipd_port IPD/PKO port to query
*
* @return Link state
*/
cvmx_helper_link_info_t __cvmx_helper_srio_link_get(int ipd_port)
{
int interface = cvmx_helper_get_interface_num(ipd_port);
int srio_port = interface - 4;
cvmx_helper_link_info_t result;
cvmx_sriox_status_reg_t srio_status_reg;
cvmx_sriomaintx_port_0_err_stat_t sriomaintx_port_0_err_stat;
cvmx_sriomaintx_port_0_ctl_t sriomaintx_port_0_ctl;
cvmx_sriomaintx_port_0_ctl2_t sriomaintx_port_0_ctl2;
result.u64 = 0;
/* Make sure register access is allowed */
srio_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(srio_port));
if (!srio_status_reg.s.access)
return result;
/* Read the port link status */
if (cvmx_srio_config_read32(srio_port, 0, -1, 0, 0,
CVMX_SRIOMAINTX_PORT_0_ERR_STAT(srio_port),
&sriomaintx_port_0_err_stat.u32))
return result;
/* Return if link is down */
if (!sriomaintx_port_0_err_stat.s.pt_ok)
return result;
/* Read the port link width and speed */
if (cvmx_srio_config_read32(srio_port, 0, -1, 0, 0,
CVMX_SRIOMAINTX_PORT_0_CTL(srio_port),
&sriomaintx_port_0_ctl.u32))
return result;
if (cvmx_srio_config_read32(srio_port, 0, -1, 0, 0,
CVMX_SRIOMAINTX_PORT_0_CTL2(srio_port),
&sriomaintx_port_0_ctl2.u32))
return result;
/* Link is up */
result.s.full_duplex = 1;
result.s.link_up = 1;
switch (sriomaintx_port_0_ctl2.s.sel_baud)
{
case 1:
result.s.speed = 1250;
break;
case 2:
result.s.speed = 2500;
break;
case 3:
result.s.speed = 3125;
break;
case 4:
result.s.speed = 5000;
break;
case 5:
result.s.speed = 6250;
break;
default:
result.s.speed = 0;
break;
}
switch (sriomaintx_port_0_ctl.s.it_width)
{
case 2: /* Four lanes */
result.s.speed += 40000;
break;
case 3: /* Two lanes */
result.s.speed += 20000;
break;
default: /* One lane */
result.s.speed += 10000;
break;
}
return result;
}
/**
* @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_srio_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
{
return 0;
}
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
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