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- /* SPDX-License-Identifier: GPL-2.0+ */
- /* Copyright IBM Corp 2019 */
- #ifndef OCC_COMMON_H
- #define OCC_COMMON_H
- #include <linux/hwmon-sysfs.h>
- #include <linux/mutex.h>
- #include <linux/sysfs.h>
- struct device;
- #define OCC_RESP_DATA_BYTES 4089
- /*
- * Same response format for all OCC versions.
- * Allocate the largest possible response.
- */
- struct occ_response {
- u8 seq_no;
- u8 cmd_type;
- u8 return_status;
- __be16 data_length;
- u8 data[OCC_RESP_DATA_BYTES];
- __be16 checksum;
- } __packed;
- struct occ_sensor_data_block_header {
- u8 eye_catcher[4];
- u8 reserved;
- u8 sensor_format;
- u8 sensor_length;
- u8 num_sensors;
- } __packed;
- struct occ_sensor_data_block {
- struct occ_sensor_data_block_header header;
- u32 data;
- } __packed;
- struct occ_poll_response_header {
- u8 status;
- u8 ext_status;
- u8 occs_present;
- u8 config_data;
- u8 occ_state;
- u8 mode;
- u8 ips_status;
- u8 error_log_id;
- __be32 error_log_start_address;
- __be16 error_log_length;
- u16 reserved;
- u8 occ_code_level[16];
- u8 eye_catcher[6];
- u8 num_sensor_data_blocks;
- u8 sensor_data_block_header_version;
- } __packed;
- struct occ_poll_response {
- struct occ_poll_response_header header;
- struct occ_sensor_data_block block;
- } __packed;
- struct occ_sensor {
- u8 num_sensors;
- u8 version;
- void *data; /* pointer to sensor data start within response */
- };
- /*
- * OCC only provides one sensor data block of each type, but any number of
- * sensors within that block.
- */
- struct occ_sensors {
- struct occ_sensor temp;
- struct occ_sensor freq;
- struct occ_sensor power;
- struct occ_sensor caps;
- struct occ_sensor extended;
- };
- /*
- * Use our own attribute struct so we can dynamically allocate space for the
- * name.
- */
- struct occ_attribute {
- char name[32];
- struct sensor_device_attribute_2 sensor;
- };
- struct occ {
- struct device *bus_dev;
- struct occ_response resp;
- struct occ_sensors sensors;
- int powr_sample_time_us; /* average power sample time */
- u8 poll_cmd_data; /* to perform OCC poll command */
- int (*send_cmd)(struct occ *occ, u8 *cmd, size_t len, void *resp,
- size_t resp_len);
- unsigned long next_update;
- struct mutex lock; /* lock OCC access */
- struct device *hwmon;
- struct occ_attribute *attrs;
- struct attribute_group group;
- const struct attribute_group *groups[2];
- bool active;
- int error; /* final transfer error after retry */
- int last_error; /* latest transfer error */
- unsigned int error_count; /* number of xfr errors observed */
- unsigned long last_safe; /* time OCC entered "safe" state */
- /*
- * Store the previous state data for comparison in order to notify
- * sysfs readers of state changes.
- */
- int prev_error;
- u8 prev_stat;
- u8 prev_ext_stat;
- u8 prev_occs_present;
- u8 prev_ips_status;
- u8 prev_mode;
- };
- int occ_active(struct occ *occ, bool active);
- int occ_setup(struct occ *occ);
- int occ_setup_sysfs(struct occ *occ);
- void occ_shutdown(struct occ *occ);
- void occ_shutdown_sysfs(struct occ *occ);
- void occ_sysfs_poll_done(struct occ *occ);
- int occ_update_response(struct occ *occ);
- #endif /* OCC_COMMON_H */
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