449 lines
12 KiB
C
449 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Xilinx SD-FEC
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*
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* Copyright (C) 2019 Xilinx, Inc.
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*
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* Description:
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* This driver is developed for SDFEC16 IP. It provides a char device
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* in sysfs and supports file operations like open(), close() and ioctl().
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*/
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#ifndef __XILINX_SDFEC_H__
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#define __XILINX_SDFEC_H__
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#include <linux/types.h>
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/* Shared LDPC Tables */
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#define XSDFEC_LDPC_SC_TABLE_ADDR_BASE (0x10000)
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#define XSDFEC_LDPC_SC_TABLE_ADDR_HIGH (0x10400)
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#define XSDFEC_LDPC_LA_TABLE_ADDR_BASE (0x18000)
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#define XSDFEC_LDPC_LA_TABLE_ADDR_HIGH (0x19000)
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#define XSDFEC_LDPC_QC_TABLE_ADDR_BASE (0x20000)
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#define XSDFEC_LDPC_QC_TABLE_ADDR_HIGH (0x28000)
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/* LDPC tables depth */
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#define XSDFEC_SC_TABLE_DEPTH \
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(XSDFEC_LDPC_SC_TABLE_ADDR_HIGH - XSDFEC_LDPC_SC_TABLE_ADDR_BASE)
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#define XSDFEC_LA_TABLE_DEPTH \
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(XSDFEC_LDPC_LA_TABLE_ADDR_HIGH - XSDFEC_LDPC_LA_TABLE_ADDR_BASE)
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#define XSDFEC_QC_TABLE_DEPTH \
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(XSDFEC_LDPC_QC_TABLE_ADDR_HIGH - XSDFEC_LDPC_QC_TABLE_ADDR_BASE)
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/**
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* enum xsdfec_code - Code Type.
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* @XSDFEC_TURBO_CODE: Driver is configured for Turbo mode.
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* @XSDFEC_LDPC_CODE: Driver is configured for LDPC mode.
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*
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* This enum is used to indicate the mode of the driver. The mode is determined
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* by checking which codes are set in the driver. Note that the mode cannot be
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* changed by the driver.
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*/
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enum xsdfec_code {
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XSDFEC_TURBO_CODE = 0,
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XSDFEC_LDPC_CODE,
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};
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/**
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* enum xsdfec_order - Order
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* @XSDFEC_MAINTAIN_ORDER: Maintain order execution of blocks.
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* @XSDFEC_OUT_OF_ORDER: Out-of-order execution of blocks.
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*
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* This enum is used to indicate whether the order of blocks can change from
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* input to output.
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*/
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enum xsdfec_order {
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XSDFEC_MAINTAIN_ORDER = 0,
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XSDFEC_OUT_OF_ORDER,
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};
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/**
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* enum xsdfec_turbo_alg - Turbo Algorithm Type.
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* @XSDFEC_MAX_SCALE: Max Log-Map algorithm with extrinsic scaling. When
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* scaling is set to this is equivalent to the Max Log-Map
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* algorithm.
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* @XSDFEC_MAX_STAR: Log-Map algorithm.
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* @XSDFEC_TURBO_ALG_MAX: Used to indicate out of bound Turbo algorithms.
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*
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* This enum specifies which Turbo Decode algorithm is in use.
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*/
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enum xsdfec_turbo_alg {
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XSDFEC_MAX_SCALE = 0,
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XSDFEC_MAX_STAR,
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XSDFEC_TURBO_ALG_MAX,
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};
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/**
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* enum xsdfec_state - State.
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* @XSDFEC_INIT: Driver is initialized.
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* @XSDFEC_STARTED: Driver is started.
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* @XSDFEC_STOPPED: Driver is stopped.
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* @XSDFEC_NEEDS_RESET: Driver needs to be reset.
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* @XSDFEC_PL_RECONFIGURE: Programmable Logic needs to be recofigured.
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*
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* This enum is used to indicate the state of the driver.
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*/
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enum xsdfec_state {
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XSDFEC_INIT = 0,
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XSDFEC_STARTED,
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XSDFEC_STOPPED,
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XSDFEC_NEEDS_RESET,
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XSDFEC_PL_RECONFIGURE,
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};
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/**
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* enum xsdfec_axis_width - AXIS_WIDTH.DIN Setting for 128-bit width.
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* @XSDFEC_1x128b: DIN data input stream consists of a 128-bit lane
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* @XSDFEC_2x128b: DIN data input stream consists of two 128-bit lanes
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* @XSDFEC_4x128b: DIN data input stream consists of four 128-bit lanes
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*
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* This enum is used to indicate the AXIS_WIDTH.DIN setting for 128-bit width.
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* The number of lanes of the DIN data input stream depends upon the
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* AXIS_WIDTH.DIN parameter.
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*/
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enum xsdfec_axis_width {
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XSDFEC_1x128b = 1,
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XSDFEC_2x128b = 2,
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XSDFEC_4x128b = 4,
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};
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/**
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* enum xsdfec_axis_word_include - Words Configuration.
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* @XSDFEC_FIXED_VALUE: Fixed, the DIN_WORDS AXI4-Stream interface is removed
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* from the IP instance and is driven with the specified
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* number of words.
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* @XSDFEC_IN_BLOCK: In Block, configures the IP instance to expect a single
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* DIN_WORDS value per input code block. The DIN_WORDS
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* interface is present.
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* @XSDFEC_PER_AXI_TRANSACTION: Per Transaction, configures the IP instance to
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* expect one DIN_WORDS value per input transaction on the DIN interface. The
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* DIN_WORDS interface is present.
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* @XSDFEC_AXIS_WORDS_INCLUDE_MAX: Used to indicate out of bound Words
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* Configurations.
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*
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* This enum is used to specify the DIN_WORDS configuration.
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*/
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enum xsdfec_axis_word_include {
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XSDFEC_FIXED_VALUE = 0,
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XSDFEC_IN_BLOCK,
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XSDFEC_PER_AXI_TRANSACTION,
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XSDFEC_AXIS_WORDS_INCLUDE_MAX,
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};
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/**
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* struct xsdfec_turbo - User data for Turbo codes.
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* @alg: Specifies which Turbo decode algorithm to use
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* @scale: Specifies the extrinsic scaling to apply when the Max Scale algorithm
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* has been selected
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*
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* Turbo code structure to communicate parameters to XSDFEC driver.
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*/
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struct xsdfec_turbo {
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__u32 alg;
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__u8 scale;
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};
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/**
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* struct xsdfec_ldpc_params - User data for LDPC codes.
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* @n: Number of code word bits
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* @k: Number of information bits
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* @psize: Size of sub-matrix
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* @nlayers: Number of layers in code
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* @nqc: Quasi Cyclic Number
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* @nmqc: Number of M-sized QC operations in parity check matrix
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* @nm: Number of M-size vectors in N
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* @norm_type: Normalization required or not
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* @no_packing: Determines if multiple QC ops should be performed
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* @special_qc: Sub-Matrix property for Circulant weight > 0
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* @no_final_parity: Decide if final parity check needs to be performed
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* @max_schedule: Experimental code word scheduling limit
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* @sc_off: SC offset
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* @la_off: LA offset
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* @qc_off: QC offset
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* @sc_table: Pointer to SC Table which must be page aligned
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* @la_table: Pointer to LA Table which must be page aligned
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* @qc_table: Pointer to QC Table which must be page aligned
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* @code_id: LDPC Code
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*
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* This structure describes the LDPC code that is passed to the driver by the
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* application.
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*/
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struct xsdfec_ldpc_params {
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__u32 n;
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__u32 k;
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__u32 psize;
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__u32 nlayers;
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__u32 nqc;
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__u32 nmqc;
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__u32 nm;
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__u32 norm_type;
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__u32 no_packing;
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__u32 special_qc;
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__u32 no_final_parity;
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__u32 max_schedule;
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__u32 sc_off;
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__u32 la_off;
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__u32 qc_off;
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__u32 *sc_table;
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__u32 *la_table;
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__u32 *qc_table;
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__u16 code_id;
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};
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/**
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* struct xsdfec_status - Status of SD-FEC core.
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* @state: State of the SD-FEC core
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* @activity: Describes if the SD-FEC instance is Active
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*/
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struct xsdfec_status {
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__u32 state;
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__s8 activity;
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};
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/**
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* struct xsdfec_irq - Enabling or Disabling Interrupts.
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* @enable_isr: If true enables the ISR
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* @enable_ecc_isr: If true enables the ECC ISR
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*/
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struct xsdfec_irq {
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__s8 enable_isr;
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__s8 enable_ecc_isr;
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};
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/**
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* struct xsdfec_config - Configuration of SD-FEC core.
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* @code: The codes being used by the SD-FEC instance
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* @order: Order of Operation
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* @din_width: Width of the DIN AXI4-Stream
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* @din_word_include: How DIN_WORDS are inputted
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* @dout_width: Width of the DOUT AXI4-Stream
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* @dout_word_include: HOW DOUT_WORDS are outputted
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* @irq: Enabling or disabling interrupts
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* @bypass: Is the core being bypassed
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* @code_wr_protect: Is write protection of LDPC codes enabled
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*/
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struct xsdfec_config {
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__u32 code;
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__u32 order;
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__u32 din_width;
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__u32 din_word_include;
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__u32 dout_width;
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__u32 dout_word_include;
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struct xsdfec_irq irq;
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__s8 bypass;
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__s8 code_wr_protect;
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};
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/**
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* struct xsdfec_stats - Stats retrived by ioctl XSDFEC_GET_STATS. Used
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* to buffer atomic_t variables from struct
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* xsdfec_dev. Counts are accumulated until
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* the user clears them.
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* @isr_err_count: Count of ISR errors
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* @cecc_count: Count of Correctable ECC errors (SBE)
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* @uecc_count: Count of Uncorrectable ECC errors (MBE)
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*/
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struct xsdfec_stats {
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__u32 isr_err_count;
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__u32 cecc_count;
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__u32 uecc_count;
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};
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/**
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* struct xsdfec_ldpc_param_table_sizes - Used to store sizes of SD-FEC table
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* entries for an individual LPDC code
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* parameter.
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* @sc_size: Size of SC table used
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* @la_size: Size of LA table used
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* @qc_size: Size of QC table used
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*/
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struct xsdfec_ldpc_param_table_sizes {
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__u32 sc_size;
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__u32 la_size;
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__u32 qc_size;
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};
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/*
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* XSDFEC IOCTL List
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*/
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#define XSDFEC_MAGIC 'f'
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/**
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* DOC: XSDFEC_START_DEV
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*
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* @Description
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*
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* ioctl to start SD-FEC core
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*
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* This fails if the XSDFEC_SET_ORDER ioctl has not been previously called
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*/
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#define XSDFEC_START_DEV _IO(XSDFEC_MAGIC, 0)
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/**
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* DOC: XSDFEC_STOP_DEV
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*
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* @Description
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*
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* ioctl to stop the SD-FEC core
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*/
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#define XSDFEC_STOP_DEV _IO(XSDFEC_MAGIC, 1)
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/**
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* DOC: XSDFEC_GET_STATUS
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*
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* @Description
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*
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* ioctl that returns status of SD-FEC core
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*/
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#define XSDFEC_GET_STATUS _IOR(XSDFEC_MAGIC, 2, struct xsdfec_status)
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/**
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* DOC: XSDFEC_SET_IRQ
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* @Parameters
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*
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* @struct xsdfec_irq *
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* Pointer to the &struct xsdfec_irq that contains the interrupt settings
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* for the SD-FEC core
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*
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* @Description
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*
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* ioctl to enable or disable irq
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*/
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#define XSDFEC_SET_IRQ _IOW(XSDFEC_MAGIC, 3, struct xsdfec_irq)
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/**
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* DOC: XSDFEC_SET_TURBO
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* @Parameters
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*
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* @struct xsdfec_turbo *
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* Pointer to the &struct xsdfec_turbo that contains the Turbo decode
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* settings for the SD-FEC core
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*
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* @Description
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*
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* ioctl that sets the SD-FEC Turbo parameter values
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_TURBO _IOW(XSDFEC_MAGIC, 4, struct xsdfec_turbo)
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/**
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* DOC: XSDFEC_ADD_LDPC_CODE_PARAMS
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* @Parameters
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*
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* @struct xsdfec_ldpc_params *
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* Pointer to the &struct xsdfec_ldpc_params that contains the LDPC code
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* parameters to be added to the SD-FEC Block
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*
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* @Description
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* ioctl to add an LDPC code to the SD-FEC LDPC codes
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*
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* This can only be used when:
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*
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* - Driver is in the XSDFEC_STOPPED state
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*
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* - SD-FEC core is configured as LPDC
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*
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* - SD-FEC Code Write Protection is disabled
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*/
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#define XSDFEC_ADD_LDPC_CODE_PARAMS \
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_IOW(XSDFEC_MAGIC, 5, struct xsdfec_ldpc_params)
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/**
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* DOC: XSDFEC_GET_CONFIG
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* @Parameters
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*
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* @struct xsdfec_config *
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* Pointer to the &struct xsdfec_config that contains the current
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* configuration settings of the SD-FEC Block
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*
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* @Description
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*
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* ioctl that returns SD-FEC core configuration
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*/
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#define XSDFEC_GET_CONFIG _IOR(XSDFEC_MAGIC, 6, struct xsdfec_config)
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/**
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* DOC: XSDFEC_GET_TURBO
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* @Parameters
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*
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* @struct xsdfec_turbo *
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* Pointer to the &struct xsdfec_turbo that contains the current Turbo
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* decode settings of the SD-FEC Block
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*
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* @Description
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*
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* ioctl that returns SD-FEC turbo param values
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*/
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#define XSDFEC_GET_TURBO _IOR(XSDFEC_MAGIC, 7, struct xsdfec_turbo)
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/**
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* DOC: XSDFEC_SET_ORDER
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* @Parameters
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*
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* @struct unsigned long *
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* Pointer to the unsigned long that contains a value from the
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* @enum xsdfec_order
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*
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* @Description
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*
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* ioctl that sets order, if order of blocks can change from input to output
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_ORDER _IOW(XSDFEC_MAGIC, 8, unsigned long)
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/**
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* DOC: XSDFEC_SET_BYPASS
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* @Parameters
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*
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* @struct bool *
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* Pointer to bool that sets the bypass value, where false results in
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* normal operation and false results in the SD-FEC performing the
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* configured operations (same number of cycles) but output data matches
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* the input data
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*
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* @Description
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*
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* ioctl that sets bypass.
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_BYPASS _IOW(XSDFEC_MAGIC, 9, bool)
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/**
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* DOC: XSDFEC_IS_ACTIVE
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* @Parameters
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*
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* @struct bool *
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* Pointer to bool that returns true if the SD-FEC is processing data
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*
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* @Description
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*
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* ioctl that determines if SD-FEC is processing data
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*/
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#define XSDFEC_IS_ACTIVE _IOR(XSDFEC_MAGIC, 10, bool)
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/**
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* DOC: XSDFEC_CLEAR_STATS
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*
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* @Description
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*
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* ioctl that clears error stats collected during interrupts
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*/
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#define XSDFEC_CLEAR_STATS _IO(XSDFEC_MAGIC, 11)
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/**
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* DOC: XSDFEC_GET_STATS
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* @Parameters
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*
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* @struct xsdfec_stats *
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* Pointer to the &struct xsdfec_stats that will contain the updated stats
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* values
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*
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* @Description
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*
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* ioctl that returns SD-FEC core stats
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_GET_STATS _IOR(XSDFEC_MAGIC, 12, struct xsdfec_stats)
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/**
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* DOC: XSDFEC_SET_DEFAULT_CONFIG
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*
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* @Description
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*
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* ioctl that returns SD-FEC core to default config, use after a reset
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_DEFAULT_CONFIG _IO(XSDFEC_MAGIC, 13)
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#endif /* __XILINX_SDFEC_H__ */
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