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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
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* regulations, and may be subject to export or import regulations in other
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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***********************license end**************************************/
/**
* @file
*
* Support library for the hardware Packet Output unit.
*
* <hr>$Revision: 49448 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-pko.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-clock.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#endif
#include "cvmx.h"
#include "cvmx-sysinfo.h"
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "cvmx-config.h"
#endif
#include "cvmx-pko.h"
#include "cvmx-helper.h"
#endif
/**
* Internal state of packet output
*/
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* Call before any other calls to initialize the packet
* output system. This does chip global config, and should only be
* done by one core.
*/
void cvmx_pko_initialize_global(void)
{
int i;
uint64_t priority = 8;
cvmx_pko_reg_cmd_buf_t config;
/* Set the size of the PKO command buffers to an odd number of 64bit
words. This allows the normal two word send to stay aligned and never
span a comamnd word buffer. */
config.u64 = 0;
config.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL;
config.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE / 8 - 1;
cvmx_write_csr(CVMX_PKO_REG_CMD_BUF, config.u64);
for (i=0; i<CVMX_PKO_MAX_OUTPUT_QUEUES; i++)
cvmx_pko_config_port(CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID, i, 1, &priority);
/* If we aren't using all of the queues optimize PKO's internal memory */
if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN63XX))
{
int num_interfaces = cvmx_helper_get_number_of_interfaces();
int last_port = cvmx_helper_get_last_ipd_port(num_interfaces-1);
int max_queues = cvmx_pko_get_base_queue(last_port) + cvmx_pko_get_num_queues(last_port);
if (OCTEON_IS_MODEL(OCTEON_CN38XX))
{
if (max_queues <= 32)
cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 2);
else if (max_queues <= 64)
cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 1);
}
else
{
if (max_queues <= 64)
cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 2);
else if (max_queues <= 128)
cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 1);
}
}
}
/**
* This function does per-core initialization required by the PKO routines.
* This must be called on all cores that will do packet output, and must
* be called after the FPA has been initialized and filled with pages.
*
* @return 0 on success
* !0 on failure
*/
int cvmx_pko_initialize_local(void)
{
/* Nothing to do */
return 0;
}
#endif
/**
* Enables the packet output hardware. It must already be
* configured.
*/
void cvmx_pko_enable(void)
{
cvmx_pko_reg_flags_t flags;
flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS);
if (flags.s.ena_pko)
cvmx_dprintf("Warning: Enabling PKO when PKO already enabled.\n");
flags.s.ena_dwb = 1;
flags.s.ena_pko = 1;
flags.s.store_be =1; /* always enable big endian for 3-word command. Does nothing for 2-word */
cvmx_write_csr(CVMX_PKO_REG_FLAGS, flags.u64);
}
/**
* Disables the packet output. Does not affect any configuration.
*/
void cvmx_pko_disable(void)
{
cvmx_pko_reg_flags_t pko_reg_flags;
pko_reg_flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS);
pko_reg_flags.s.ena_pko = 0;
cvmx_write_csr(CVMX_PKO_REG_FLAGS, pko_reg_flags.u64);
}
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* @INTERNAL
* Reset the packet output.
*/
static void __cvmx_pko_reset(void)
{
cvmx_pko_reg_flags_t pko_reg_flags;
pko_reg_flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS);
pko_reg_flags.s.reset = 1;
cvmx_write_csr(CVMX_PKO_REG_FLAGS, pko_reg_flags.u64);
}
/**
* Shutdown and free resources required by packet output.
*/
void cvmx_pko_shutdown(void)
{
cvmx_pko_mem_queue_ptrs_t config;
int queue;
cvmx_pko_disable();
for (queue=0; queue<CVMX_PKO_MAX_OUTPUT_QUEUES; queue++)
{
config.u64 = 0;
config.s.tail = 1;
config.s.index = 0;
config.s.port = CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID;
config.s.queue = queue & 0x7f;
config.s.qos_mask = 0;
config.s.buf_ptr = 0;
if (!OCTEON_IS_MODEL(OCTEON_CN3XXX))
{
cvmx_pko_reg_queue_ptrs1_t config1;
config1.u64 = 0;
config1.s.qid7 = queue >> 7;
cvmx_write_csr(CVMX_PKO_REG_QUEUE_PTRS1, config1.u64);
}
cvmx_write_csr(CVMX_PKO_MEM_QUEUE_PTRS, config.u64);
cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_PKO(queue));
}
__cvmx_pko_reset();
}
/**
* Configure a output port and the associated queues for use.
*
* @param port Port to configure.
* @param base_queue First queue number to associate with this port.
* @param num_queues Number of queues to associate with this port
* @param priority Array of priority levels for each queue. Values are
* allowed to be 0-8. A value of 8 get 8 times the traffic
* of a value of 1. A value of 0 indicates that no rounds
* will be participated in. These priorities can be changed
* on the fly while the pko is enabled. A priority of 9
* indicates that static priority should be used. If static
* priority is used all queues with static priority must be
* contiguous starting at the base_queue, and lower numbered
* queues have higher priority than higher numbered queues.
* There must be num_queues elements in the array.
*/
cvmx_pko_status_t cvmx_pko_config_port(uint64_t port, uint64_t base_queue, uint64_t num_queues, const uint64_t priority[])
{
cvmx_pko_status_t result_code;
uint64_t queue;
cvmx_pko_mem_queue_ptrs_t config;
cvmx_pko_reg_queue_ptrs1_t config1;
int static_priority_base = -1;
int static_priority_end = -1;
if ((port >= CVMX_PKO_NUM_OUTPUT_PORTS) && (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID))
{
cvmx_dprintf("ERROR: cvmx_pko_config_port: Invalid port %llu\n", (unsigned long long)port);
return CVMX_PKO_INVALID_PORT;
}
if (base_queue + num_queues > CVMX_PKO_MAX_OUTPUT_QUEUES)
{
cvmx_dprintf("ERROR: cvmx_pko_config_port: Invalid queue range %llu\n", (unsigned long long)(base_queue + num_queues));
return CVMX_PKO_INVALID_QUEUE;
}
if (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID)
{
/* Validate the static queue priority setup and set static_priority_base and static_priority_end
** accordingly. */
for (queue = 0; queue < num_queues; queue++)
{
/* Find first queue of static priority */
if (static_priority_base == -1 && priority[queue] == CVMX_PKO_QUEUE_STATIC_PRIORITY)
static_priority_base = queue;
/* Find last queue of static priority */
if (static_priority_base != -1 && static_priority_end == -1 && priority[queue] != CVMX_PKO_QUEUE_STATIC_PRIORITY && queue)
static_priority_end = queue - 1;
else if (static_priority_base != -1 && static_priority_end == -1 && queue == num_queues - 1)
static_priority_end = queue; /* all queues are static priority */
/* Check to make sure all static priority queues are contiguous. Also catches some cases of
** static priorites not starting at queue 0. */
if (static_priority_end != -1 && (int)queue > static_priority_end && priority[queue] == CVMX_PKO_QUEUE_STATIC_PRIORITY)
{
cvmx_dprintf("ERROR: cvmx_pko_config_port: Static priority queues aren't contiguous or don't start at base queue. q: %d, eq: %d\n", (int)queue, static_priority_end);
return CVMX_PKO_INVALID_PRIORITY;
}
}
if (static_priority_base > 0)
{
cvmx_dprintf("ERROR: cvmx_pko_config_port: Static priority queues don't start at base queue. sq: %d\n", static_priority_base);
return CVMX_PKO_INVALID_PRIORITY;
}
#if 0
cvmx_dprintf("Port %d: Static priority queue base: %d, end: %d\n", port, static_priority_base, static_priority_end);
#endif
}
/* At this point, static_priority_base and static_priority_end are either both -1,
** or are valid start/end queue numbers */
result_code = CVMX_PKO_SUCCESS;
#ifdef PKO_DEBUG
cvmx_dprintf("num queues: %d (%lld,%lld)\n", num_queues, CVMX_PKO_QUEUES_PER_PORT_INTERFACE0, CVMX_PKO_QUEUES_PER_PORT_INTERFACE1);
#endif
for (queue = 0; queue < num_queues; queue++)
{
uint64_t *buf_ptr = NULL;
config1.u64 = 0;
config1.s.idx3 = queue >> 3;
config1.s.qid7 = (base_queue + queue) >> 7;
config.u64 = 0;
config.s.tail = queue == (num_queues - 1);
config.s.index = queue;
config.s.port = port;
config.s.queue = base_queue + queue;
config.s.static_p = static_priority_base >= 0;
config.s.static_q = (int)queue <= static_priority_end;
config.s.s_tail = (int)queue == static_priority_end;
/* Convert the priority into an enable bit field. Try to space the bits
out evenly so the packet don't get grouped up */
switch ((int)priority[queue])
{
case 0: config.s.qos_mask = 0x00; break;
case 1: config.s.qos_mask = 0x01; break;
case 2: config.s.qos_mask = 0x11; break;
case 3: config.s.qos_mask = 0x49; break;
case 4: config.s.qos_mask = 0x55; break;
case 5: config.s.qos_mask = 0x57; break;
case 6: config.s.qos_mask = 0x77; break;
case 7: config.s.qos_mask = 0x7f; break;
case 8: config.s.qos_mask = 0xff; break;
case CVMX_PKO_QUEUE_STATIC_PRIORITY:
config.s.qos_mask = 0xff;
break;
default:
cvmx_dprintf("ERROR: cvmx_pko_config_port: Invalid priority %llu\n", (unsigned long long)priority[queue]);
config.s.qos_mask = 0xff;
result_code = CVMX_PKO_INVALID_PRIORITY;
break;
}
if (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID)
{
cvmx_cmd_queue_result_t cmd_res = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_PKO(base_queue + queue),
CVMX_PKO_MAX_QUEUE_DEPTH,
CVMX_FPA_OUTPUT_BUFFER_POOL,
CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE - CVMX_PKO_COMMAND_BUFFER_SIZE_ADJUST*8);
if (cmd_res != CVMX_CMD_QUEUE_SUCCESS)
{
switch (cmd_res)
{
case CVMX_CMD_QUEUE_NO_MEMORY:
cvmx_dprintf("ERROR: cvmx_pko_config_port: Unable to allocate output buffer.\n");
return(CVMX_PKO_NO_MEMORY);
case CVMX_CMD_QUEUE_ALREADY_SETUP:
cvmx_dprintf("ERROR: cvmx_pko_config_port: Port already setup.\n");
return(CVMX_PKO_PORT_ALREADY_SETUP);
case CVMX_CMD_QUEUE_INVALID_PARAM:
default:
cvmx_dprintf("ERROR: cvmx_pko_config_port: Command queue initialization failed.\n");
return(CVMX_PKO_CMD_QUEUE_INIT_ERROR);
}
}
buf_ptr = (uint64_t*)cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_PKO(base_queue + queue));
config.s.buf_ptr = cvmx_ptr_to_phys(buf_ptr);
}
else
config.s.buf_ptr = 0;
CVMX_SYNCWS;
if (!OCTEON_IS_MODEL(OCTEON_CN3XXX))
{
cvmx_write_csr(CVMX_PKO_REG_QUEUE_PTRS1, config1.u64);
}
cvmx_write_csr(CVMX_PKO_MEM_QUEUE_PTRS, config.u64);
}
return result_code;
}
#ifdef PKO_DEBUG
/**
* Show map of ports -> queues for different cores.
*/
void cvmx_pko_show_queue_map()
{
int core, port;
int pko_output_ports = 36;
cvmx_dprintf("port");
for(port=0; port<pko_output_ports; port++)
cvmx_dprintf("%3d ", port);
cvmx_dprintf("\n");
for(core=0; core<CVMX_MAX_CORES; core++)
{
cvmx_dprintf("\n%2d: ", core);
for(port=0; port<pko_output_ports; port++)
{
cvmx_dprintf("%3d ", cvmx_pko_get_base_queue_per_core(port, core));
}
}
cvmx_dprintf("\n");
}
#endif
/**
* Rate limit a PKO port to a max packets/sec. This function is only
* supported on CN51XX and higher, excluding CN58XX.
*
* @param port Port to rate limit
* @param packets_s Maximum packet/sec
* @param burst Maximum number of packets to burst in a row before rate
* limiting cuts in.
*
* @return Zero on success, negative on failure
*/
int cvmx_pko_rate_limit_packets(int port, int packets_s, int burst)
{
cvmx_pko_mem_port_rate0_t pko_mem_port_rate0;
cvmx_pko_mem_port_rate1_t pko_mem_port_rate1;
pko_mem_port_rate0.u64 = 0;
pko_mem_port_rate0.s.pid = port;
pko_mem_port_rate0.s.rate_pkt = cvmx_clock_get_rate(CVMX_CLOCK_SCLK) / packets_s / 16;
/* No cost per word since we are limited by packets/sec, not bits/sec */
pko_mem_port_rate0.s.rate_word = 0;
pko_mem_port_rate1.u64 = 0;
pko_mem_port_rate1.s.pid = port;
pko_mem_port_rate1.s.rate_lim = ((uint64_t)pko_mem_port_rate0.s.rate_pkt * burst) >> 8;
cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE0, pko_mem_port_rate0.u64);
cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE1, pko_mem_port_rate1.u64);
return 0;
}
/**
* Rate limit a PKO port to a max bits/sec. This function is only
* supported on CN51XX and higher, excluding CN58XX.
*
* @param port Port to rate limit
* @param bits_s PKO rate limit in bits/sec
* @param burst Maximum number of bits to burst before rate
* limiting cuts in.
*
* @return Zero on success, negative on failure
*/
int cvmx_pko_rate_limit_bits(int port, uint64_t bits_s, int burst)
{
cvmx_pko_mem_port_rate0_t pko_mem_port_rate0;
cvmx_pko_mem_port_rate1_t pko_mem_port_rate1;
uint64_t clock_rate = cvmx_clock_get_rate(CVMX_CLOCK_SCLK);
uint64_t tokens_per_bit = clock_rate*16 / bits_s;
pko_mem_port_rate0.u64 = 0;
pko_mem_port_rate0.s.pid = port;
/* Each packet has a 12 bytes of interframe gap, an 8 byte preamble, and a
4 byte CRC. These are not included in the per word count. Multiply
by 8 to covert to bits and divide by 256 for limit granularity */
pko_mem_port_rate0.s.rate_pkt = (12 + 8 + 4) * 8 * tokens_per_bit / 256;
/* Each 8 byte word has 64bits */
pko_mem_port_rate0.s.rate_word = 64 * tokens_per_bit;
pko_mem_port_rate1.u64 = 0;
pko_mem_port_rate1.s.pid = port;
pko_mem_port_rate1.s.rate_lim = tokens_per_bit * burst / 256;
cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE0, pko_mem_port_rate0.u64);
cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE1, pko_mem_port_rate1.u64);
return 0;
}
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */