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