u-boot/include/linux/soc/ti/ti_sci_protocol.h
Lokesh Vutla ccbc8b2fdd firmware: ti_sci: Add support for processor control services
TI-SCI message protocol provides support for controlling of various
physical cores available in SoC. In order to control which host is
capable of controlling a physical processor core, there is a processor
access control list that needs to be populated as part of the board
configuration data.

Introduce support for the set of TI-SCI message protocol apis that
provide us with this capability of controlling physical cores.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2018-09-11 08:32:55 -04:00

314 lines
13 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Texas Instruments System Control Interface Protocol
* Based on include/linux/soc/ti/ti_sci_protocol.h from Linux.
*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
* Nishanth Menon
* Lokesh Vutla <lokeshvutla@ti.com>
*/
#ifndef __TISCI_PROTOCOL_H
#define __TISCI_PROTOCOL_H
/**
* struct ti_sci_version_info - version information structure
* @abi_major: Major ABI version. Change here implies risk of backward
* compatibility break.
* @abi_minor: Minor ABI version. Change here implies new feature addition,
* or compatible change in ABI.
* @firmware_revision: Firmware revision (not usually used).
* @firmware_description: Firmware description (not usually used).
*/
struct ti_sci_version_info {
u8 abi_major;
u8 abi_minor;
u16 firmware_revision;
char firmware_description[32];
};
struct ti_sci_handle;
/**
* struct ti_sci_board_ops - Board config operations
* @board_config: Command to set the board configuration
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
* @board_config_rm: Command to set the board resource management
* configuration
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
* @board_config_security: Command to set the board security configuration
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
* @board_config_pm: Command to trigger and set the board power and clock
* management related configuration
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
*/
struct ti_sci_board_ops {
int (*board_config)(const struct ti_sci_handle *handle,
u64 addr, u32 size);
int (*board_config_rm)(const struct ti_sci_handle *handle,
u64 addr, u32 size);
int (*board_config_security)(const struct ti_sci_handle *handle,
u64 addr, u32 size);
int (*board_config_pm)(const struct ti_sci_handle *handle,
u64 addr, u32 size);
};
/**
* struct ti_sci_dev_ops - Device control operations
* @get_device: Command to request for device managed by TISCI
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
* @idle_device: Command to idle a device managed by TISCI
* Returns 0 for successful exclusive request, else returns
* corresponding error message.
* @put_device: Command to release a device managed by TISCI
* Returns 0 for successful release, else returns corresponding
* error message.
* @is_valid: Check if the device ID is a valid ID.
* Returns 0 if the ID is valid, else returns corresponding error.
* @get_context_loss_count: Command to retrieve context loss counter - this
* increments every time the device looses context. Overflow
* is possible.
* - count: pointer to u32 which will retrieve counter
* Returns 0 for successful information request and count has
* proper data, else returns corresponding error message.
* @is_idle: Reports back about device idle state
* - req_state: Returns requested idle state
* Returns 0 for successful information request and req_state and
* current_state has proper data, else returns corresponding error
* message.
* @is_stop: Reports back about device stop state
* - req_state: Returns requested stop state
* - current_state: Returns current stop state
* Returns 0 for successful information request and req_state and
* current_state has proper data, else returns corresponding error
* message.
* @is_on: Reports back about device ON(or active) state
* - req_state: Returns requested ON state
* - current_state: Returns current ON state
* Returns 0 for successful information request and req_state and
* current_state has proper data, else returns corresponding error
* message.
* @is_transitioning: Reports back if the device is in the middle of transition
* of state.
* -current_state: Returns 'true' if currently transitioning.
* @set_device_resets: Command to configure resets for device managed by TISCI.
* -reset_state: Device specific reset bit field
* Returns 0 for successful request, else returns
* corresponding error message.
* @get_device_resets: Command to read state of resets for device managed
* by TISCI.
* -reset_state: pointer to u32 which will retrieve resets
* Returns 0 for successful request, else returns
* corresponding error message.
*
* NOTE: for all these functions, the following parameters are generic in
* nature:
* -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
* -id: Device Identifier
*
* Request for the device - NOTE: the client MUST maintain integrity of
* usage count by balancing get_device with put_device. No refcounting is
* managed by driver for that purpose.
*/
struct ti_sci_dev_ops {
int (*get_device)(const struct ti_sci_handle *handle, u32 id);
int (*idle_device)(const struct ti_sci_handle *handle, u32 id);
int (*put_device)(const struct ti_sci_handle *handle, u32 id);
int (*is_valid)(const struct ti_sci_handle *handle, u32 id);
int (*get_context_loss_count)(const struct ti_sci_handle *handle,
u32 id, u32 *count);
int (*is_idle)(const struct ti_sci_handle *handle, u32 id,
bool *requested_state);
int (*is_stop)(const struct ti_sci_handle *handle, u32 id,
bool *req_state, bool *current_state);
int (*is_on)(const struct ti_sci_handle *handle, u32 id,
bool *req_state, bool *current_state);
int (*is_transitioning)(const struct ti_sci_handle *handle, u32 id,
bool *current_state);
int (*set_device_resets)(const struct ti_sci_handle *handle, u32 id,
u32 reset_state);
int (*get_device_resets)(const struct ti_sci_handle *handle, u32 id,
u32 *reset_state);
};
/**
* struct ti_sci_clk_ops - Clock control operations
* @get_clock: Request for activation of clock and manage by processor
* - needs_ssc: 'true' if Spread Spectrum clock is desired.
* - can_change_freq: 'true' if frequency change is desired.
* - enable_input_term: 'true' if input termination is desired.
* @idle_clock: Request for Idling a clock managed by processor
* @put_clock: Release the clock to be auto managed by TISCI
* @is_auto: Is the clock being auto managed
* - req_state: state indicating if the clock is auto managed
* @is_on: Is the clock ON
* - req_state: if the clock is requested to be forced ON
* - current_state: if the clock is currently ON
* @is_off: Is the clock OFF
* - req_state: if the clock is requested to be forced OFF
* - current_state: if the clock is currently Gated
* @set_parent: Set the clock source of a specific device clock
* - parent_id: Parent clock identifier to set.
* @get_parent: Get the current clock source of a specific device clock
* - parent_id: Parent clock identifier which is the parent.
* @get_num_parents: Get the number of parents of the current clock source
* - num_parents: returns the number of parent clocks.
* @get_best_match_freq: Find a best matching frequency for a frequency
* range.
* - match_freq: Best matching frequency in Hz.
* @set_freq: Set the Clock frequency
* @get_freq: Get the Clock frequency
* - current_freq: Frequency in Hz that the clock is at.
*
* NOTE: for all these functions, the following parameters are generic in
* nature:
* -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
* -did: Device identifier this request is for
* -cid: Clock identifier for the device for this request.
* Each device has it's own set of clock inputs. This indexes
* which clock input to modify.
* -min_freq: The minimum allowable frequency in Hz. This is the minimum
* allowable programmed frequency and does not account for clock
* tolerances and jitter.
* -target_freq: The target clock frequency in Hz. A frequency will be
* processed as close to this target frequency as possible.
* -max_freq: The maximum allowable frequency in Hz. This is the maximum
* allowable programmed frequency and does not account for clock
* tolerances and jitter.
*
* Request for the clock - NOTE: the client MUST maintain integrity of
* usage count by balancing get_clock with put_clock. No refcounting is
* managed by driver for that purpose.
*/
struct ti_sci_clk_ops {
int (*get_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid,
bool needs_ssc, bool can_change_freq,
bool enable_input_term);
int (*idle_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid);
int (*put_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid);
int (*is_auto)(const struct ti_sci_handle *handle, u32 did, u8 cid,
bool *req_state);
int (*is_on)(const struct ti_sci_handle *handle, u32 did, u8 cid,
bool *req_state, bool *current_state);
int (*is_off)(const struct ti_sci_handle *handle, u32 did, u8 cid,
bool *req_state, bool *current_state);
int (*set_parent)(const struct ti_sci_handle *handle, u32 did, u8 cid,
u8 parent_id);
int (*get_parent)(const struct ti_sci_handle *handle, u32 did, u8 cid,
u8 *parent_id);
int (*get_num_parents)(const struct ti_sci_handle *handle, u32 did,
u8 cid, u8 *num_parents);
int (*get_best_match_freq)(const struct ti_sci_handle *handle, u32 did,
u8 cid, u64 min_freq, u64 target_freq,
u64 max_freq, u64 *match_freq);
int (*set_freq)(const struct ti_sci_handle *handle, u32 did, u8 cid,
u64 min_freq, u64 target_freq, u64 max_freq);
int (*get_freq)(const struct ti_sci_handle *handle, u32 did, u8 cid,
u64 *current_freq);
};
/**
* struct ti_sci_core_ops - SoC Core Operations
* @reboot_device: Reboot the SoC
* Returns 0 for successful request(ideally should never return),
* else returns corresponding error value.
*/
struct ti_sci_core_ops {
int (*reboot_device)(const struct ti_sci_handle *handle);
};
/**
* struct ti_sci_proc_ops - Processor specific operations.
*
* @proc_request: Request for controlling a physical processor.
* The requesting host should be in the processor access list.
* @proc_release: Relinquish a physical processor control
* @proc_handover: Handover a physical processor control to another host
* in the permitted list.
* @set_proc_boot_cfg: Base configuration of the processor
* @set_proc_boot_ctrl: Setup limited control flags in specific cases.
* @proc_auth_boot_image:
* @get_proc_boot_status: Get the state of physical processor
*
* NOTE: for all these functions, the following parameters are generic in
* nature:
* -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
* -pid: Processor ID
*
*/
struct ti_sci_proc_ops {
int (*proc_request)(const struct ti_sci_handle *handle, u8 pid);
int (*proc_release)(const struct ti_sci_handle *handle, u8 pid);
int (*proc_handover)(const struct ti_sci_handle *handle, u8 pid,
u8 hid);
int (*set_proc_boot_cfg)(const struct ti_sci_handle *handle, u8 pid,
u64 bv, u32 cfg_set, u32 cfg_clr);
int (*set_proc_boot_ctrl)(const struct ti_sci_handle *handle, u8 pid,
u32 ctrl_set, u32 ctrl_clr);
int (*proc_auth_boot_image)(const struct ti_sci_handle *handle, u8 pid,
u64 caddr);
int (*get_proc_boot_status)(const struct ti_sci_handle *handle, u8 pid,
u64 *bv, u32 *cfg_flags, u32 *ctrl_flags,
u32 *sts_flags);
};
/**
* struct ti_sci_ops - Function support for TI SCI
* @board_ops: Miscellaneous operations
* @dev_ops: Device specific operations
* @clk_ops: Clock specific operations
* @core_ops: Core specific operations
* @proc_ops: Processor specific operations
*/
struct ti_sci_ops {
struct ti_sci_board_ops board_ops;
struct ti_sci_dev_ops dev_ops;
struct ti_sci_clk_ops clk_ops;
struct ti_sci_core_ops core_ops;
struct ti_sci_proc_ops proc_ops;
};
/**
* struct ti_sci_handle - Handle returned to TI SCI clients for usage.
* @ops: operations that are made available to TI SCI clients
* @version: structure containing version information
*/
struct ti_sci_handle {
struct ti_sci_ops ops;
struct ti_sci_version_info version;
};
#if IS_ENABLED(CONFIG_TI_SCI_PROTOCOL)
const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev);
const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev);
const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
const char *property);
#else /* CONFIG_TI_SCI_PROTOCOL */
static inline
const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev)
{
return ERR_PTR(-EINVAL);
}
static inline const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev)
{
return ERR_PTR(-EINVAL);
}
static inline
const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
const char *property)
{
return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_TI_SCI_PROTOCOL */
#endif /* __TISCI_PROTOCOL_H */