/* * Currently we don't support any PECI command over 32 bytes.
*/ #define PECI_REQUEST_MAX_BUF_SIZE 32
struct peci_controller; struct peci_request;
/** * struct peci_controller_ops - PECI controller specific methods * @xfer: PECI transfer function * * PECI controllers may have different hardware interfaces - the drivers * implementing PECI controllers can use this structure to abstract away those * differences by exposing a common interface for PECI core.
*/ struct peci_controller_ops { int (*xfer)(struct peci_controller *controller, u8 addr, struct peci_request *req);
};
/** * struct peci_controller - PECI controller * @dev: device object to register PECI controller to the device model * @ops: pointer to device specific controller operations * @bus_lock: lock used to protect multiple callers * @id: PECI controller ID * * PECI controllers usually connect to their drivers using non-PECI bus, * such as the platform bus. * Each PECI controller can communicate with one or more PECI devices.
*/ struct peci_controller { struct device dev; conststruct peci_controller_ops *ops; struct mutex bus_lock; /* held for the duration of xfer */
u8 id;
};
/** * struct peci_device - PECI device * @dev: device object to register PECI device to the device model * @info: PECI device characteristics * @info.x86_vfm: device vendor-family-model * @info.peci_revision: PECI revision supported by the PECI device * @info.socket_id: the socket ID represented by the PECI device * @addr: address used on the PECI bus connected to the parent controller * @deleted: indicates that PECI device was already deleted * * A peci_device identifies a single device (i.e. CPU) connected to a PECI bus. * The behaviour exposed to the rest of the system is defined by the PECI driver * managing the device.
*/ struct peci_device { struct device dev; struct {
u32 x86_vfm;
u8 peci_revision;
u8 socket_id;
} info;
u8 addr; bool deleted;
};
/** * struct peci_request - PECI request * @device: PECI device to which the request is sent * @tx: TX buffer specific data * @tx.buf: TX buffer * @tx.len: transfer data length in bytes * @rx: RX buffer specific data * @rx.buf: RX buffer * @rx.len: received data length in bytes * * A peci_request represents a request issued by PECI originator (TX) and * a response received from PECI responder (RX).
*/ struct peci_request { struct peci_device *device; struct {
u8 buf[PECI_REQUEST_MAX_BUF_SIZE];
u8 len;
} rx, tx;
};
#endif/* __LINUX_PECI_H */
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