/* 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__ */