Linux-2.6.33.2/drivers/staging/octeon/cvmx-pko.c
/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/*
* Support library for the hardware Packet Output unit.
*/
#include <asm/octeon/octeon.h>
#include "cvmx-config.h"
#include "cvmx-pko.h"
#include "cvmx-helper.h"
/**
* Internal state of packet output
*/
/**
* 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;
union cvmx_pko_reg_cmd_buf 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)) {
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.
*
* Returns 0 on success
* !0 on failure
*/
int cvmx_pko_initialize_local(void)
{
/* Nothing to do */
return 0;
}
/**
* Enables the packet output hardware. It must already be
* configured.
*/
void cvmx_pko_enable(void)
{
union cvmx_pko_reg_flags 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;
/*
* always enable big endian for 3-word command. Does nothing
* for 2-word.
*/
flags.s.store_be = 1;
cvmx_write_csr(CVMX_PKO_REG_FLAGS, flags.u64);
}
/**
* Disables the packet output. Does not affect any configuration.
*/
void cvmx_pko_disable(void)
{
union cvmx_pko_reg_flags 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);
}
/**
* Reset the packet output.
*/
static void __cvmx_pko_reset(void)
{
union cvmx_pko_reg_flags 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)
{
union cvmx_pko_mem_queue_ptrs 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)) {
union cvmx_pko_reg_queue_ptrs1 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.
*
* @port: Port to configure.
* @base_queue: First queue number to associate with this port.
* @num_queues: Number of queues to associate with this port
* @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;
union cvmx_pko_mem_queue_ptrs config;
union cvmx_pko_reg_queue_ptrs1 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)
/* all queues are static priority */
static_priority_end = queue;
/*
* 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;
if (!cvmx_octeon_is_pass1()) {
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:
/* Pass 1 will fall through to the error case */
if (!cvmx_octeon_is_pass1()) {
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.
*
* @port: Port to rate limit
* @packets_s: Maximum packet/sec
* @burst: Maximum number of packets to burst in a row before rate
* limiting cuts in.
*
* Returns Zero on success, negative on failure
*/
int cvmx_pko_rate_limit_packets(int port, int packets_s, int burst)
{
union cvmx_pko_mem_port_rate0 pko_mem_port_rate0;
union cvmx_pko_mem_port_rate1 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_sysinfo_get()->cpu_clock_hz / 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.
*
* @port: Port to rate limit
* @bits_s: PKO rate limit in bits/sec
* @burst: Maximum number of bits to burst before rate
* limiting cuts in.
*
* Returns Zero on success, negative on failure
*/
int cvmx_pko_rate_limit_bits(int port, uint64_t bits_s, int burst)
{
union cvmx_pko_mem_port_rate0 pko_mem_port_rate0;
union cvmx_pko_mem_port_rate1 pko_mem_port_rate1;
uint64_t clock_rate = cvmx_sysinfo_get()->cpu_clock_hz;
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;
}