/* * Below are masks for QSFP pins. Pins are the same for HFI0 and HFI1. * _N means asserted low
*/ #define QSFP_HFI0_I2CCLK BIT(0) #define QSFP_HFI0_I2CDAT BIT(1) #define QSFP_HFI0_RESET_N BIT(2) #define QSFP_HFI0_INT_N BIT(3) #define QSFP_HFI0_MODPRST_N BIT(4)
/* number of bytes in i2c offset for QSFP devices */ #define __QSFP_OFFSET_SIZE 1 /* num address bytes */ #define QSFP_OFFSET_SIZE (__QSFP_OFFSET_SIZE << 8) /* shifted value */
/* Defined fields that Intel requires of qualified cables */ /* Byte 0 is Identifier, not checked */ /* Byte 1 is reserved "status MSB" */ #define QSFP_MONITOR_VAL_START 22 #define QSFP_MONITOR_VAL_END 81 #define QSFP_MONITOR_RANGE (QSFP_MONITOR_VAL_END - QSFP_MONITOR_VAL_START + 1) #define QSFP_TX_CTRL_BYTE_OFFS 86 #define QSFP_PWR_CTRL_BYTE_OFFS 93 #define QSFP_CDR_CTRL_BYTE_OFFS 98
#define QSFP_PAGE_SELECT_BYTE_OFFS 127 /* Byte 128 is Identifier: must be 0x0c for QSFP, or 0x0d for QSFP+ */ #define QSFP_MOD_ID_OFFS 128 /* * Byte 129 is "Extended Identifier". * For bits [7:6]: 0:1.5W, 1:2.0W, 2:2.5W, 3:3.5W * For bits [1:0]: 0:Unused, 1:4W, 2:4.5W, 3:5W
*/ #define QSFP_MOD_PWR_OFFS 129 /* Byte 130 is Connector type. Not Intel req'd */ /* Bytes 131..138 are Transceiver types, bit maps for various tech, none IB */ /* Byte 139 is encoding. code 0x01 is 8b10b. Not Intel req'd */ /* byte 140 is nominal bit-rate, in units of 100Mbits/sec */ #define QSFP_NOM_BIT_RATE_100_OFFS 140 /* Byte 141 is Extended Rate Select. Not Intel req'd */ /* Bytes 142..145 are lengths for various fiber types. Not Intel req'd */ /* Byte 146 is length for Copper. Units of 1 meter */ #define QSFP_MOD_LEN_OFFS 146 /* * Byte 147 is Device technology. D0..3 not Intel req'd * D4..7 select from 15 choices, translated by table:
*/ #define QSFP_MOD_TECH_OFFS 147 externconstchar *const hfi1_qsfp_devtech[16]; /* Active Equalization includes fiber, copper full EQ, and copper near Eq */ #define QSFP_IS_ACTIVE(tech) ((0xA2FF >> ((tech) >> 4)) & 1) /* Active Equalization includes fiber, copper full EQ, and copper far Eq */ #define QSFP_IS_ACTIVE_FAR(tech) ((0x32FF >> ((tech) >> 4)) & 1) /* Attenuation should be valid for copper other than full/near Eq */ #define QSFP_HAS_ATTEN(tech) ((0x4D00 >> ((tech) >> 4)) & 1) /* Length is only valid if technology is "copper" */ #define QSFP_IS_CU(tech) ((0xED00 >> ((tech) >> 4)) & 1) #define QSFP_TECH_1490 9
/* * struct qsfp_data encapsulates state of QSFP device for one port. * it will be part of port-specific data if a board supports QSFP. * * Since multiple board-types use QSFP, and their pport_data structs * differ (in the chip-specific section), we need a pointer to its head. * * Avoiding premature optimization, we will have one work_struct per port, * and let the qsfp_lock arbitrate access to common resources. *
*/ struct qsfp_data { /* Helps to find our way */ struct hfi1_pportdata *ppd; struct work_struct qsfp_work;
u8 cache[QSFP_MAX_NUM_PAGES * 128]; /* protect qsfp data */
spinlock_t qsfp_lock;
u8 check_interrupt_flags;
u8 reset_needed;
u8 limiting_active;
u8 cache_valid;
u8 cache_refresh_required;
};
int refresh_qsfp_cache(struct hfi1_pportdata *ppd, struct qsfp_data *cp); int get_qsfp_power_class(u8 power_byte); int qsfp_mod_present(struct hfi1_pportdata *ppd); int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
u32 len, u8 *data);
int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset, void *bp, int len); int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset, void *bp, int len); int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp, int len); int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp, int len); int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp, int len); struct hfi1_asic_data; int set_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad); void clean_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
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