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freebsd-skq/sys/contrib/octeon-sdk/cvmx-pko.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
*
* Support library for the hardware Packet Output unit.
*
* <hr>$Revision: 42150 $<hr>
*/
#include "cvmx.h"
#include "cvmx-pko.h"
#include "cvmx-sysinfo.h"
#include "cvmx-helper.h"
/**
* 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_pool_cfg_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))
{
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_queue_cfg_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_queue_cfg_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;
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:
if (!cvmx_octeon_is_pass1()) /* Pass 1 will fall through to the error case */
{
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_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.
*
* @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_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;
}
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
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