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freebsd-nq/sys/contrib/octeon-sdk/cvmx-helper-util.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

500 lines
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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
*
* Small helper utilities.
*
* <hr>$Revision: 49448 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <linux/module.h>
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-pip.h>
#include <asm/octeon/cvmx-ipd.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-pko-defs.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#include "cvmx-config.h"
#endif
#include "cvmx.h"
#include "cvmx-bootmem.h"
#include "cvmx-fpa.h"
#include "cvmx-pip.h"
#include "cvmx-pko.h"
#include "cvmx-ipd.h"
#include "cvmx-gmx.h"
#include "cvmx-spi.h"
#include "cvmx-sysinfo.h"
#include "cvmx-helper.h"
#include "cvmx-helper-util.h"
#include "cvmx-version.h"
#endif
#ifdef CVMX_ENABLE_HELPER_FUNCTIONS
#ifndef CVMX_BUILD_FOR_LINUX_KERNEL
/**
* Get the version of the CVMX libraries.
*
* @return Version string. Note this buffer is allocated statically
* and will be shared by all callers.
*/
const char *cvmx_helper_get_version(void)
{
return OCTEON_SDK_VERSION_STRING;
}
#endif
/**
* Convert a interface mode into a human readable string
*
* @param mode Mode to convert
*
* @return String
*/
const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode)
{
switch (mode)
{
case CVMX_HELPER_INTERFACE_MODE_DISABLED: return "DISABLED";
case CVMX_HELPER_INTERFACE_MODE_RGMII: return "RGMII";
case CVMX_HELPER_INTERFACE_MODE_GMII: return "GMII";
case CVMX_HELPER_INTERFACE_MODE_SPI: return "SPI";
case CVMX_HELPER_INTERFACE_MODE_PCIE: return "PCIE";
case CVMX_HELPER_INTERFACE_MODE_XAUI: return "XAUI";
case CVMX_HELPER_INTERFACE_MODE_SGMII: return "SGMII";
case CVMX_HELPER_INTERFACE_MODE_PICMG: return "PICMG";
case CVMX_HELPER_INTERFACE_MODE_NPI: return "NPI";
case CVMX_HELPER_INTERFACE_MODE_LOOP: return "LOOP";
case CVMX_HELPER_INTERFACE_MODE_SRIO: return "SRIO";
}
return "UNKNOWN";
}
/**
* Debug routine to dump the packet structure to the console
*
* @param work Work queue entry containing the packet to dump
* @return
*/
int cvmx_helper_dump_packet(cvmx_wqe_t *work)
{
uint64_t count;
uint64_t remaining_bytes;
cvmx_buf_ptr_t buffer_ptr;
uint64_t start_of_buffer;
uint8_t * data_address;
uint8_t * end_of_data;
cvmx_dprintf("Packet Length: %u\n", work->len);
cvmx_dprintf(" Input Port: %u\n", work->ipprt);
cvmx_dprintf(" QoS: %u\n", work->qos);
cvmx_dprintf(" Buffers: %u\n", work->word2.s.bufs);
if (work->word2.s.bufs == 0)
{
cvmx_ipd_wqe_fpa_queue_t wqe_pool;
wqe_pool.u64 = cvmx_read_csr(CVMX_IPD_WQE_FPA_QUEUE);
buffer_ptr.u64 = 0;
buffer_ptr.s.pool = wqe_pool.s.wqe_pool;
buffer_ptr.s.size = 128;
buffer_ptr.s.addr = cvmx_ptr_to_phys(work->packet_data);
if (cvmx_likely(!work->word2.s.not_IP))
{
cvmx_pip_ip_offset_t pip_ip_offset;
pip_ip_offset.u64 = cvmx_read_csr(CVMX_PIP_IP_OFFSET);
buffer_ptr.s.addr += (pip_ip_offset.s.offset<<3) - work->word2.s.ip_offset;
buffer_ptr.s.addr += (work->word2.s.is_v6^1)<<2;
}
else
{
/* WARNING: This code assume that the packet is not RAW. If it was,
we would use PIP_GBL_CFG[RAW_SHF] instead of
PIP_GBL_CFG[NIP_SHF] */
cvmx_pip_gbl_cfg_t pip_gbl_cfg;
pip_gbl_cfg.u64 = cvmx_read_csr(CVMX_PIP_GBL_CFG);
buffer_ptr.s.addr += pip_gbl_cfg.s.nip_shf;
}
}
else
buffer_ptr = work->packet_ptr;
remaining_bytes = work->len;
while (remaining_bytes)
{
start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
cvmx_dprintf(" Buffer Start:%llx\n", (unsigned long long)start_of_buffer);
cvmx_dprintf(" Buffer I : %u\n", buffer_ptr.s.i);
cvmx_dprintf(" Buffer Back: %u\n", buffer_ptr.s.back);
cvmx_dprintf(" Buffer Pool: %u\n", buffer_ptr.s.pool);
cvmx_dprintf(" Buffer Data: %llx\n", (unsigned long long)buffer_ptr.s.addr);
cvmx_dprintf(" Buffer Size: %u\n", buffer_ptr.s.size);
cvmx_dprintf("\t\t");
data_address = (uint8_t *)cvmx_phys_to_ptr(buffer_ptr.s.addr);
end_of_data = data_address + buffer_ptr.s.size;
count = 0;
while (data_address < end_of_data)
{
if (remaining_bytes == 0)
break;
else
remaining_bytes--;
cvmx_dprintf("%02x", (unsigned int)*data_address);
data_address++;
if (remaining_bytes && (count == 7))
{
cvmx_dprintf("\n\t\t");
count = 0;
}
else
count++;
}
cvmx_dprintf("\n");
if (remaining_bytes)
buffer_ptr = *(cvmx_buf_ptr_t*)cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
}
return 0;
}
/**
* Setup Random Early Drop on a specific input queue
*
* @param queue Input queue to setup RED on (0-7)
* @param pass_thresh
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @param drop_thresh
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* @return Zero on success. Negative on failure
*/
int cvmx_helper_setup_red_queue(int queue, int pass_thresh, int drop_thresh)
{
cvmx_ipd_qosx_red_marks_t red_marks;
cvmx_ipd_red_quex_param_t red_param;
/* Set RED to begin dropping packets when there are pass_thresh buffers
left. It will linearly drop more packets until reaching drop_thresh
buffers */
red_marks.u64 = 0;
red_marks.s.drop = drop_thresh;
red_marks.s.pass = pass_thresh;
cvmx_write_csr(CVMX_IPD_QOSX_RED_MARKS(queue), red_marks.u64);
/* Use the actual queue 0 counter, not the average */
red_param.u64 = 0;
red_param.s.prb_con = (255ul<<24) / (red_marks.s.pass - red_marks.s.drop);
red_param.s.avg_con = 1;
red_param.s.new_con = 255;
red_param.s.use_pcnt = 1;
cvmx_write_csr(CVMX_IPD_RED_QUEX_PARAM(queue), red_param.u64);
return 0;
}
/**
* Setup Random Early Drop to automatically begin dropping packets.
*
* @param pass_thresh
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @param drop_thresh
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* @return Zero on success. Negative on failure
*/
int cvmx_helper_setup_red(int pass_thresh, int drop_thresh)
{
cvmx_ipd_portx_bp_page_cnt_t page_cnt;
cvmx_ipd_bp_prt_red_end_t ipd_bp_prt_red_end;
cvmx_ipd_red_port_enable_t red_port_enable;
int queue;
int interface;
int port;
/* Disable backpressure based on queued buffers. It needs SW support */
page_cnt.u64 = 0;
page_cnt.s.bp_enb = 0;
page_cnt.s.page_cnt = 100;
for (interface=0; interface<2; interface++)
{
for (port=cvmx_helper_get_first_ipd_port(interface); port<cvmx_helper_get_last_ipd_port(interface); port++)
cvmx_write_csr(CVMX_IPD_PORTX_BP_PAGE_CNT(port), page_cnt.u64);
}
for (queue=0; queue<8; queue++)
cvmx_helper_setup_red_queue(queue, pass_thresh, drop_thresh);
/* Shutoff the dropping based on the per port page count. SW isn't
decrementing it right now */
ipd_bp_prt_red_end.u64 = 0;
ipd_bp_prt_red_end.s.prt_enb = 0;
cvmx_write_csr(CVMX_IPD_BP_PRT_RED_END, ipd_bp_prt_red_end.u64);
red_port_enable.u64 = 0;
red_port_enable.s.prt_enb = 0xfffffffffull;
red_port_enable.s.avg_dly = 10000;
red_port_enable.s.prb_dly = 10000;
cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE, red_port_enable.u64);
/* Shutoff the dropping of packets based on RED for SRIO ports */
if (OCTEON_IS_MODEL(OCTEON_CN6XXX))
{
cvmx_ipd_red_port_enable2_t red_port_enable2;
red_port_enable2.u64 = 0;
red_port_enable2.s.prt_enb = 0xf0;
cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE2, red_port_enable2.u64);
}
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_setup_red);
#endif
/**
* @INTERNAL
* Setup the common GMX settings that determine the number of
* ports. These setting apply to almost all configurations of all
* chips.
*
* @param interface Interface to configure
* @param num_ports Number of ports on the interface
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_setup_gmx(int interface, int num_ports)
{
cvmx_gmxx_tx_prts_t gmx_tx_prts;
cvmx_gmxx_rx_prts_t gmx_rx_prts;
cvmx_pko_reg_gmx_port_mode_t pko_mode;
cvmx_gmxx_txx_thresh_t gmx_tx_thresh;
int index;
/* Tell GMX the number of TX ports on this interface */
gmx_tx_prts.u64 = cvmx_read_csr(CVMX_GMXX_TX_PRTS(interface));
gmx_tx_prts.s.prts = num_ports;
cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), gmx_tx_prts.u64);
/* Tell GMX the number of RX ports on this interface. This only
** applies to *GMII and XAUI ports */
if (cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_RGMII
|| cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_SGMII
|| cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_GMII
|| cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_XAUI)
{
if (num_ports > 4)
{
cvmx_dprintf("__cvmx_helper_setup_gmx: Illegal num_ports\n");
return(-1);
}
gmx_rx_prts.u64 = cvmx_read_csr(CVMX_GMXX_RX_PRTS(interface));
gmx_rx_prts.s.prts = num_ports;
cvmx_write_csr(CVMX_GMXX_RX_PRTS(interface), gmx_rx_prts.u64);
}
/* Skip setting CVMX_PKO_REG_GMX_PORT_MODE on 30XX, 31XX, and 50XX */
if (!OCTEON_IS_MODEL(OCTEON_CN30XX) && !OCTEON_IS_MODEL(OCTEON_CN31XX) && !OCTEON_IS_MODEL(OCTEON_CN50XX))
{
/* Tell PKO the number of ports on this interface */
pko_mode.u64 = cvmx_read_csr(CVMX_PKO_REG_GMX_PORT_MODE);
if (interface == 0)
{
if (num_ports == 1)
pko_mode.s.mode0 = 4;
else if (num_ports == 2)
pko_mode.s.mode0 = 3;
else if (num_ports <= 4)
pko_mode.s.mode0 = 2;
else if (num_ports <= 8)
pko_mode.s.mode0 = 1;
else
pko_mode.s.mode0 = 0;
}
else
{
if (num_ports == 1)
pko_mode.s.mode1 = 4;
else if (num_ports == 2)
pko_mode.s.mode1 = 3;
else if (num_ports <= 4)
pko_mode.s.mode1 = 2;
else if (num_ports <= 8)
pko_mode.s.mode1 = 1;
else
pko_mode.s.mode1 = 0;
}
cvmx_write_csr(CVMX_PKO_REG_GMX_PORT_MODE, pko_mode.u64);
}
/* Set GMX to buffer as much data as possible before starting transmit.
This reduces the chances that we have a TX under run due to memory
contention. Any packet that fits entirely in the GMX FIFO can never
have an under run regardless of memory load */
gmx_tx_thresh.u64 = cvmx_read_csr(CVMX_GMXX_TXX_THRESH(0, interface));
if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
{
/* These chips have a fixed max threshold of 0x40 */
gmx_tx_thresh.s.cnt = 0x40;
}
else
{
/* Choose the max value for the number of ports */
if (num_ports <= 1)
gmx_tx_thresh.s.cnt = 0x100 / 1;
else if (num_ports == 2)
gmx_tx_thresh.s.cnt = 0x100 / 2;
else
gmx_tx_thresh.s.cnt = 0x100 / 4;
}
/* SPI and XAUI can have lots of ports but the GMX hardware only ever has
a max of 4 */
if (num_ports > 4)
num_ports = 4;
for (index=0; index<num_ports; index++)
cvmx_write_csr(CVMX_GMXX_TXX_THRESH(index, interface), gmx_tx_thresh.u64);
return 0;
}
/**
* Returns the IPD/PKO port number for a port on the given
* interface.
*
* @param interface Interface to use
* @param port Port on the interface
*
* @return IPD/PKO port number
*/
int cvmx_helper_get_ipd_port(int interface, int port)
{
switch (interface)
{
case 0: return port;
case 1: return port + 16;
case 2: return port + 32;
case 3: return port + 36;
case 4: return port + 40;
case 5: return port + 42;
}
return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_ipd_port);
#endif
#endif /* CVMX_ENABLE_HELPER_FUNCTIONS */
/**
* Returns the interface number for an IPD/PKO port number.
*
* @param ipd_port IPD/PKO port number
*
* @return Interface number
*/
int cvmx_helper_get_interface_num(int ipd_port)
{
if (ipd_port < 16)
return 0;
else if (ipd_port < 32)
return 1;
else if (ipd_port < 36)
return 2;
else if (ipd_port < 40)
return 3;
else if (ipd_port < 42)
return 4;
else if (ipd_port < 44)
return 5;
else
cvmx_dprintf("cvmx_helper_get_interface_num: Illegal IPD port number\n");
return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_interface_num);
#endif
/**
* Returns the interface index number for an IPD/PKO port
* number.
*
* @param ipd_port IPD/PKO port number
*
* @return Interface index number
*/
int cvmx_helper_get_interface_index_num(int ipd_port)
{
if (ipd_port < 32)
return ipd_port & 15;
else if (ipd_port < 40)
return ipd_port & 3;
else if (ipd_port < 44)
return ipd_port & 1;
else
cvmx_dprintf("cvmx_helper_get_interface_index_num: Illegal IPD port number\n");
return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_interface_index_num);
#endif
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