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185f812c41
Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
570 lines
18 KiB
C
570 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Marvell International Ltd.
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*
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* Interface to the hardware Packet Output unit.
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*
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* Starting with SDK 1.7.0, the PKO output functions now support
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* two types of locking. CVMX_PKO_LOCK_ATOMIC_TAG continues to
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* function similarly to previous SDKs by using POW atomic tags
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* to preserve ordering and exclusivity. As a new option, you
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* can now pass CVMX_PKO_LOCK_CMD_QUEUE which uses a ll/sc
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* memory based locking instead. This locking has the advantage
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* of not affecting the tag state but doesn't preserve packet
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* ordering. CVMX_PKO_LOCK_CMD_QUEUE is appropriate in most
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* generic code while CVMX_PKO_LOCK_CMD_QUEUE should be used
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* with hand tuned fast path code.
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*
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* Some of other SDK differences visible to the command command
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* queuing:
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* - PKO indexes are no longer stored in the FAU. A large
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* percentage of the FAU register block used to be tied up
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* maintaining PKO queue pointers. These are now stored in a
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* global named block.
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* - The PKO <b>use_locking</b> parameter can now have a global
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* effect. Since all application use the same named block,
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* queue locking correctly applies across all operating
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* systems when using CVMX_PKO_LOCK_CMD_QUEUE.
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* - PKO 3 word commands are now supported. Use
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* cvmx_pko_send_packet_finish3().
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*/
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#ifndef __CVMX_HWPKO_H__
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#define __CVMX_HWPKO_H__
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#include "cvmx-hwfau.h"
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#include "cvmx-fpa.h"
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#include "cvmx-pow.h"
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#include "cvmx-cmd-queue.h"
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#include "cvmx-helper.h"
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#include "cvmx-helper-util.h"
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#include "cvmx-helper-cfg.h"
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/* Adjust the command buffer size by 1 word so that in the case of using only
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** two word PKO commands no command words stradle buffers. The useful values
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** for this are 0 and 1. */
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#define CVMX_PKO_COMMAND_BUFFER_SIZE_ADJUST (1)
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#define CVMX_PKO_MAX_OUTPUT_QUEUES_STATIC 256
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#define CVMX_PKO_MAX_OUTPUT_QUEUES \
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((OCTEON_IS_OCTEON2() || OCTEON_IS_MODEL(OCTEON_CN70XX)) ? 256 : 128)
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#define CVMX_PKO_NUM_OUTPUT_PORTS \
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((OCTEON_IS_MODEL(OCTEON_CN63XX)) ? 44 : (OCTEON_IS_MODEL(OCTEON_CN66XX) ? 48 : 40))
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#define CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID 63
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#define CVMX_PKO_QUEUE_STATIC_PRIORITY 9
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#define CVMX_PKO_ILLEGAL_QUEUE 0xFFFF
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#define CVMX_PKO_MAX_QUEUE_DEPTH 0
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typedef enum {
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CVMX_PKO_SUCCESS,
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CVMX_PKO_INVALID_PORT,
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CVMX_PKO_INVALID_QUEUE,
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CVMX_PKO_INVALID_PRIORITY,
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CVMX_PKO_NO_MEMORY,
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CVMX_PKO_PORT_ALREADY_SETUP,
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CVMX_PKO_CMD_QUEUE_INIT_ERROR
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} cvmx_pko_return_value_t;
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/**
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* This enumeration represents the differnet locking modes supported by PKO.
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*/
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typedef enum {
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CVMX_PKO_LOCK_NONE = 0,
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CVMX_PKO_LOCK_ATOMIC_TAG = 1,
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CVMX_PKO_LOCK_CMD_QUEUE = 2,
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} cvmx_pko_lock_t;
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typedef struct cvmx_pko_port_status {
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u32 packets;
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u64 octets;
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u64 doorbell;
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} cvmx_pko_port_status_t;
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/**
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* This structure defines the address to use on a packet enqueue
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*/
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typedef union {
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u64 u64;
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struct {
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cvmx_mips_space_t mem_space : 2;
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u64 reserved : 13;
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u64 is_io : 1;
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u64 did : 8;
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u64 reserved2 : 4;
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u64 reserved3 : 15;
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u64 port : 9;
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u64 queue : 9;
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u64 reserved4 : 3;
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} s;
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} cvmx_pko_doorbell_address_t;
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/**
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* Structure of the first packet output command word.
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*/
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typedef union {
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u64 u64;
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struct {
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cvmx_fau_op_size_t size1 : 2;
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cvmx_fau_op_size_t size0 : 2;
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u64 subone1 : 1;
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u64 reg1 : 11;
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u64 subone0 : 1;
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u64 reg0 : 11;
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u64 le : 1;
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u64 n2 : 1;
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u64 wqp : 1;
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u64 rsp : 1;
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u64 gather : 1;
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u64 ipoffp1 : 7;
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u64 ignore_i : 1;
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u64 dontfree : 1;
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u64 segs : 6;
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u64 total_bytes : 16;
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} s;
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} cvmx_pko_command_word0_t;
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/**
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* Call before any other calls to initialize the packet
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* output system.
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*/
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void cvmx_pko_hw_init(u8 pool, unsigned int bufsize);
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/**
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* Enables the packet output hardware. It must already be
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* configured.
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*/
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void cvmx_pko_enable(void);
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/**
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* Disables the packet output. Does not affect any configuration.
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*/
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void cvmx_pko_disable(void);
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/**
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* Shutdown and free resources required by packet output.
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*/
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void cvmx_pko_shutdown(void);
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/**
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* Configure a output port and the associated queues for use.
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*
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* @param port Port to configure.
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* @param base_queue First queue number to associate with this port.
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* @param num_queues Number of queues t oassociate with this port
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* @param priority Array of priority levels for each queue. Values are
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* allowed to be 1-8. A value of 8 get 8 times the traffic
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* of a value of 1. There must be num_queues elements in the
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* array.
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*/
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cvmx_pko_return_value_t cvmx_pko_config_port(int port, int base_queue, int num_queues,
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const u8 priority[]);
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/**
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* Ring the packet output doorbell. This tells the packet
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* output hardware that "len" command words have been added
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* to its pending list. This command includes the required
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* CVMX_SYNCWS before the doorbell ring.
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*
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* WARNING: This function may have to look up the proper PKO port in
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* the IPD port to PKO port map, and is thus slower than calling
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* cvmx_pko_doorbell_pkoid() directly if the PKO port identifier is
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* known.
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*
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* @param ipd_port The IPD port corresponding the to pko port the packet is for
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* @param queue Queue the packet is for
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* @param len Length of the command in 64 bit words
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*/
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static inline void cvmx_pko_doorbell(u64 ipd_port, u64 queue, u64 len)
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{
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cvmx_pko_doorbell_address_t ptr;
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u64 pko_port;
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pko_port = ipd_port;
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if (octeon_has_feature(OCTEON_FEATURE_PKND))
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pko_port = cvmx_helper_cfg_ipd2pko_port_base(ipd_port);
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ptr.u64 = 0;
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ptr.s.mem_space = CVMX_IO_SEG;
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ptr.s.did = CVMX_OCT_DID_PKT_SEND;
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ptr.s.is_io = 1;
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ptr.s.port = pko_port;
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ptr.s.queue = queue;
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/* Need to make sure output queue data is in DRAM before doorbell write */
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CVMX_SYNCWS;
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cvmx_write_io(ptr.u64, len);
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}
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/**
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* Prepare to send a packet. This may initiate a tag switch to
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* get exclusive access to the output queue structure, and
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* performs other prep work for the packet send operation.
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*
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* cvmx_pko_send_packet_finish() MUST be called after this function is called,
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* and must be called with the same port/queue/use_locking arguments.
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*
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* The use_locking parameter allows the caller to use three
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* possible locking modes.
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* - CVMX_PKO_LOCK_NONE
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* - PKO doesn't do any locking. It is the responsibility
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* of the application to make sure that no other core
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* is accessing the same queue at the same time.
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* - CVMX_PKO_LOCK_ATOMIC_TAG
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* - PKO performs an atomic tagswitch to insure exclusive
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* access to the output queue. This will maintain
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* packet ordering on output.
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* - CVMX_PKO_LOCK_CMD_QUEUE
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* - PKO uses the common command queue locks to insure
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* exclusive access to the output queue. This is a
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* memory based ll/sc. This is the most portable
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* locking mechanism.
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*
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* NOTE: If atomic locking is used, the POW entry CANNOT be
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* descheduled, as it does not contain a valid WQE pointer.
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*
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* @param port Port to send it on, this can be either IPD port or PKO
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* port.
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* @param queue Queue to use
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* @param use_locking
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* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
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*/
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static inline void cvmx_pko_send_packet_prepare(u64 port __attribute__((unused)), u64 queue,
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cvmx_pko_lock_t use_locking)
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{
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if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG) {
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/*
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* Must do a full switch here to handle all cases. We use a
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* fake WQE pointer, as the POW does not access this memory.
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* The WQE pointer and group are only used if this work is
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* descheduled, which is not supported by the
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* cvmx_pko_send_packet_prepare/cvmx_pko_send_packet_finish
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* combination. Note that this is a special case in which these
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* fake values can be used - this is not a general technique.
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*/
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u32 tag = CVMX_TAG_SW_BITS_INTERNAL << CVMX_TAG_SW_SHIFT |
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CVMX_TAG_SUBGROUP_PKO << CVMX_TAG_SUBGROUP_SHIFT |
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(CVMX_TAG_SUBGROUP_MASK & queue);
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cvmx_pow_tag_sw_full((cvmx_wqe_t *)cvmx_phys_to_ptr(0x80), tag,
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CVMX_POW_TAG_TYPE_ATOMIC, 0);
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}
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}
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#define cvmx_pko_send_packet_prepare_pkoid cvmx_pko_send_packet_prepare
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/**
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* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
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* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
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* cvmx_pko_send_packet_finish().
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*
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* WARNING: This function may have to look up the proper PKO port in
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* the IPD port to PKO port map, and is thus slower than calling
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* cvmx_pko_send_packet_finish_pkoid() directly if the PKO port
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* identifier is known.
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*
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* @param ipd_port The IPD port corresponding the to pko port the packet is for
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* @param queue Queue to use
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* @param pko_command
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* PKO HW command word
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* @param packet Packet to send
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* @param use_locking
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* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
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*
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* Return: returns CVMX_PKO_SUCCESS on success, or error code on failure of output
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*/
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static inline cvmx_pko_return_value_t
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cvmx_hwpko_send_packet_finish(u64 ipd_port, u64 queue, cvmx_pko_command_word0_t pko_command,
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cvmx_buf_ptr_t packet, cvmx_pko_lock_t use_locking)
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{
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cvmx_cmd_queue_result_t result;
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if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
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cvmx_pow_tag_sw_wait();
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result = cvmx_cmd_queue_write2(CVMX_CMD_QUEUE_PKO(queue),
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(use_locking == CVMX_PKO_LOCK_CMD_QUEUE), pko_command.u64,
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packet.u64);
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if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS)) {
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cvmx_pko_doorbell(ipd_port, queue, 2);
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return CVMX_PKO_SUCCESS;
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} else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL)) {
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return CVMX_PKO_NO_MEMORY;
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} else {
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return CVMX_PKO_INVALID_QUEUE;
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}
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}
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/**
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* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
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* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
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* cvmx_pko_send_packet_finish().
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*
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* WARNING: This function may have to look up the proper PKO port in
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* the IPD port to PKO port map, and is thus slower than calling
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* cvmx_pko_send_packet_finish3_pkoid() directly if the PKO port
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* identifier is known.
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*
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* @param ipd_port The IPD port corresponding the to pko port the packet is for
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* @param queue Queue to use
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* @param pko_command
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* PKO HW command word
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* @param packet Packet to send
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* @param addr Plysical address of a work queue entry or physical address to zero on complete.
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* @param use_locking
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* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
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*
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* Return: returns CVMX_PKO_SUCCESS on success, or error code on failure of output
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*/
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static inline cvmx_pko_return_value_t
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cvmx_hwpko_send_packet_finish3(u64 ipd_port, u64 queue, cvmx_pko_command_word0_t pko_command,
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cvmx_buf_ptr_t packet, u64 addr, cvmx_pko_lock_t use_locking)
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{
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cvmx_cmd_queue_result_t result;
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if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
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cvmx_pow_tag_sw_wait();
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result = cvmx_cmd_queue_write3(CVMX_CMD_QUEUE_PKO(queue),
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(use_locking == CVMX_PKO_LOCK_CMD_QUEUE), pko_command.u64,
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packet.u64, addr);
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if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS)) {
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cvmx_pko_doorbell(ipd_port, queue, 3);
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return CVMX_PKO_SUCCESS;
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} else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL)) {
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return CVMX_PKO_NO_MEMORY;
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} else {
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return CVMX_PKO_INVALID_QUEUE;
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}
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}
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/**
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* Get the first pko_port for the (interface, index)
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*
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* @param interface
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* @param index
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*/
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int cvmx_pko_get_base_pko_port(int interface, int index);
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/**
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* Get the number of pko_ports for the (interface, index)
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*
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* @param interface
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* @param index
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*/
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int cvmx_pko_get_num_pko_ports(int interface, int index);
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/**
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* For a given port number, return the base pko output queue
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* for the port.
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*
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* @param port IPD port number
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* Return: Base output queue
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*/
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int cvmx_pko_get_base_queue(int port);
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/**
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* For a given port number, return the number of pko output queues.
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*
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* @param port IPD port number
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* Return: Number of output queues
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*/
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int cvmx_pko_get_num_queues(int port);
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/**
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* Sets the internal FPA pool data structure for PKO comamnd queue.
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* @param pool fpa pool number yo use
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* @param buffer_size buffer size of pool
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* @param buffer_count number of buufers to allocate to pool
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*
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* @note the caller is responsable for setting up the pool with
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* an appropriate buffer size and sufficient buffer count.
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*/
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void cvmx_pko_set_cmd_que_pool_config(s64 pool, u64 buffer_size, u64 buffer_count);
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/**
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* Get the status counters for a port.
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*
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* @param ipd_port Port number (ipd_port) to get statistics for.
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* @param clear Set to 1 to clear the counters after they are read
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* @param status Where to put the results.
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*
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* Note:
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* - Only the doorbell for the base queue of the ipd_port is
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* collected.
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* - Retrieving the stats involves writing the index through
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* CVMX_PKO_REG_READ_IDX and reading the stat CSRs, in that
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* order. It is not MP-safe and caller should guarantee
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* atomicity.
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*/
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void cvmx_pko_get_port_status(u64 ipd_port, u64 clear, cvmx_pko_port_status_t *status);
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/**
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* Rate limit a PKO port to a max packets/sec. This function is only
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* supported on CN57XX, CN56XX, CN55XX, and CN54XX.
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*
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* @param port Port to rate limit
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* @param packets_s Maximum packet/sec
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* @param burst Maximum number of packets to burst in a row before rate
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* limiting cuts in.
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*
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* Return: Zero on success, negative on failure
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*/
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int cvmx_pko_rate_limit_packets(int port, int packets_s, int burst);
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/**
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* Rate limit a PKO port to a max bits/sec. This function is only
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* supported on CN57XX, CN56XX, CN55XX, and CN54XX.
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*
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* @param port Port to rate limit
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* @param bits_s PKO rate limit in bits/sec
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* @param burst Maximum number of bits to burst before rate
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* limiting cuts in.
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*
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* Return: Zero on success, negative on failure
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*/
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int cvmx_pko_rate_limit_bits(int port, u64 bits_s, int burst);
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/**
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* @INTERNAL
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*
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* Retrieve the PKO pipe number for a port
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*
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* @param interface
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* @param index
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*
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* Return: negative on error.
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*
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* This applies only to the non-loopback interfaces.
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*
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*/
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int __cvmx_pko_get_pipe(int interface, int index);
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/**
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* For a given PKO port number, return the base output queue
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* for the port.
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*
|
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* @param pko_port PKO port number
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* Return: Base output queue
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|
*/
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int cvmx_pko_get_base_queue_pkoid(int pko_port);
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|
|
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/**
|
|
* For a given PKO port number, return the number of output queues
|
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* for the port.
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*
|
|
* @param pko_port PKO port number
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* Return: the number of output queues
|
|
*/
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int cvmx_pko_get_num_queues_pkoid(int pko_port);
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|
|
|
/**
|
|
* Ring the packet output doorbell. This tells the packet
|
|
* output hardware that "len" command words have been added
|
|
* to its pending list. This command includes the required
|
|
* CVMX_SYNCWS before the doorbell ring.
|
|
*
|
|
* @param pko_port Port the packet is for
|
|
* @param queue Queue the packet is for
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|
* @param len Length of the command in 64 bit words
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|
*/
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|
static inline void cvmx_pko_doorbell_pkoid(u64 pko_port, u64 queue, u64 len)
|
|
{
|
|
cvmx_pko_doorbell_address_t ptr;
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|
|
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ptr.u64 = 0;
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ptr.s.mem_space = CVMX_IO_SEG;
|
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ptr.s.did = CVMX_OCT_DID_PKT_SEND;
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|
ptr.s.is_io = 1;
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ptr.s.port = pko_port;
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ptr.s.queue = queue;
|
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/* Need to make sure output queue data is in DRAM before doorbell write */
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|
CVMX_SYNCWS;
|
|
cvmx_write_io(ptr.u64, len);
|
|
}
|
|
|
|
/**
|
|
* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
|
|
* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
|
|
* cvmx_pko_send_packet_finish_pkoid().
|
|
*
|
|
* @param pko_port Port to send it on
|
|
* @param queue Queue to use
|
|
* @param pko_command
|
|
* PKO HW command word
|
|
* @param packet Packet to send
|
|
* @param use_locking
|
|
* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
|
|
*
|
|
* Return: returns CVMX_PKO_SUCCESS on success, or error code on failure of output
|
|
*/
|
|
static inline cvmx_pko_return_value_t
|
|
cvmx_hwpko_send_packet_finish_pkoid(int pko_port, u64 queue, cvmx_pko_command_word0_t pko_command,
|
|
cvmx_buf_ptr_t packet, cvmx_pko_lock_t use_locking)
|
|
{
|
|
cvmx_cmd_queue_result_t result;
|
|
|
|
if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
|
|
cvmx_pow_tag_sw_wait();
|
|
|
|
result = cvmx_cmd_queue_write2(CVMX_CMD_QUEUE_PKO(queue),
|
|
(use_locking == CVMX_PKO_LOCK_CMD_QUEUE), pko_command.u64,
|
|
packet.u64);
|
|
if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS)) {
|
|
cvmx_pko_doorbell_pkoid(pko_port, queue, 2);
|
|
return CVMX_PKO_SUCCESS;
|
|
} else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL)) {
|
|
return CVMX_PKO_NO_MEMORY;
|
|
} else {
|
|
return CVMX_PKO_INVALID_QUEUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
|
|
* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
|
|
* cvmx_pko_send_packet_finish_pkoid().
|
|
*
|
|
* @param pko_port The PKO port the packet is for
|
|
* @param queue Queue to use
|
|
* @param pko_command
|
|
* PKO HW command word
|
|
* @param packet Packet to send
|
|
* @param addr Plysical address of a work queue entry or physical address to zero on complete.
|
|
* @param use_locking
|
|
* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
|
|
*
|
|
* Return: returns CVMX_PKO_SUCCESS on success, or error code on failure of output
|
|
*/
|
|
static inline cvmx_pko_return_value_t
|
|
cvmx_hwpko_send_packet_finish3_pkoid(u64 pko_port, u64 queue, cvmx_pko_command_word0_t pko_command,
|
|
cvmx_buf_ptr_t packet, u64 addr, cvmx_pko_lock_t use_locking)
|
|
{
|
|
cvmx_cmd_queue_result_t result;
|
|
|
|
if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
|
|
cvmx_pow_tag_sw_wait();
|
|
|
|
result = cvmx_cmd_queue_write3(CVMX_CMD_QUEUE_PKO(queue),
|
|
(use_locking == CVMX_PKO_LOCK_CMD_QUEUE), pko_command.u64,
|
|
packet.u64, addr);
|
|
if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS)) {
|
|
cvmx_pko_doorbell_pkoid(pko_port, queue, 3);
|
|
return CVMX_PKO_SUCCESS;
|
|
} else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL)) {
|
|
return CVMX_PKO_NO_MEMORY;
|
|
} else {
|
|
return CVMX_PKO_INVALID_QUEUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Obtain the number of PKO commands pending in a queue
|
|
*
|
|
* @param queue is the queue identifier to be queried
|
|
* Return: the number of commands pending transmission or -1 on error
|
|
*/
|
|
int cvmx_pko_queue_pend_count(cvmx_cmd_queue_id_t queue);
|
|
|
|
void cvmx_pko_set_cmd_queue_pool_buffer_count(u64 buffer_count);
|
|
|
|
#endif /* __CVMX_HWPKO_H__ */
|