/* 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__
/** * 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, unsignedlong) /** * 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__ */
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