238 lines
7.5 KiB
C
238 lines
7.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only
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*
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* Copyright (C) 2020-21 Intel Corporation.
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*/
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#ifndef IOSM_IPC_PROTOCOL_H
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#define IOSM_IPC_PROTOCOL_H
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#include "iosm_ipc_imem.h"
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#include "iosm_ipc_pm.h"
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#include "iosm_ipc_protocol_ops.h"
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/* Trigger the doorbell interrupt on CP. */
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#define IPC_DOORBELL_IRQ_HPDA 0
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#define IPC_DOORBELL_IRQ_IPC 1
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#define IPC_DOORBELL_IRQ_SLEEP 2
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/* IRQ vector number. */
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#define IPC_DEVICE_IRQ_VECTOR 0
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#define IPC_MSG_IRQ_VECTOR 0
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#define IPC_UL_PIPE_IRQ_VECTOR 0
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#define IPC_DL_PIPE_IRQ_VECTOR 0
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#define IPC_MEM_MSG_ENTRIES 128
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/* Default time out for sending IPC messages like open pipe, close pipe etc.
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* during run mode.
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*
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* If the message interface lock to CP times out, the link to CP is broken.
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* mode : run mode (IPC_MEM_EXEC_STAGE_RUN)
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* unit : milliseconds
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*/
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#define IPC_MSG_COMPLETE_RUN_DEFAULT_TIMEOUT 500 /* 0.5 seconds */
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/* Default time out for sending IPC messages like open pipe, close pipe etc.
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* during boot mode.
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*
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* If the message interface lock to CP times out, the link to CP is broken.
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* mode : boot mode
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* (IPC_MEM_EXEC_STAGE_BOOT | IPC_MEM_EXEC_STAGE_PSI | IPC_MEM_EXEC_STAGE_EBL)
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* unit : milliseconds
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*/
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#define IPC_MSG_COMPLETE_BOOT_DEFAULT_TIMEOUT 500 /* 0.5 seconds */
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/**
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* struct ipc_protocol_context_info - Structure of the context info
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* @device_info_addr: 64 bit address to device info
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* @head_array: 64 bit address to head pointer arr for the pipes
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* @tail_array: 64 bit address to tail pointer arr for the pipes
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* @msg_head: 64 bit address to message head pointer
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* @msg_tail: 64 bit address to message tail pointer
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* @msg_ring_addr: 64 bit pointer to the message ring buffer
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* @msg_ring_entries: This field provides the number of entries which
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* the MR can hold
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* @msg_irq_vector: This field provides the IRQ which shall be
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* generated by the EP device when generating
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* completion for Messages.
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* @device_info_irq_vector: This field provides the IRQ which shall be
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* generated by the EP dev after updating Dev. Info
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*/
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struct ipc_protocol_context_info {
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phys_addr_t device_info_addr;
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phys_addr_t head_array;
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phys_addr_t tail_array;
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phys_addr_t msg_head;
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phys_addr_t msg_tail;
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phys_addr_t msg_ring_addr;
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__le16 msg_ring_entries;
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u8 msg_irq_vector;
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u8 device_info_irq_vector;
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};
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/**
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* struct ipc_protocol_device_info - Structure for the device information
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* @execution_stage: CP execution stage
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* @ipc_status: IPC states
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* @device_sleep_notification: Requested device pm states
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*/
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struct ipc_protocol_device_info {
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__le32 execution_stage;
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__le32 ipc_status;
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__le32 device_sleep_notification;
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};
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/**
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* struct ipc_protocol_ap_shm - Protocol Shared Memory Structure
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* @ci: Context information struct
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* @device_info: Device information struct
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* @msg_head: Point to msg head
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* @head_array: Array of head pointer
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* @msg_tail: Point to msg tail
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* @tail_array: Array of tail pointer
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* @msg_ring: Circular buffers for the read/tail and write/head
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* indeces.
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*/
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struct ipc_protocol_ap_shm {
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struct ipc_protocol_context_info ci;
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struct ipc_protocol_device_info device_info;
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__le32 msg_head;
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__le32 head_array[IPC_MEM_MAX_PIPES];
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__le32 msg_tail;
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__le32 tail_array[IPC_MEM_MAX_PIPES];
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union ipc_mem_msg_entry msg_ring[IPC_MEM_MSG_ENTRIES];
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};
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/**
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* struct iosm_protocol - Structure for IPC protocol.
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* @p_ap_shm: Pointer to Protocol Shared Memory Structure
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* @pm: Instance to struct iosm_pm
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* @pcie: Pointer to struct iosm_pcie
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* @imem: Pointer to struct iosm_imem
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* @rsp_ring: Array of OS completion objects to be triggered once CP
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* acknowledges a request in the message ring
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* @dev: Pointer to device structure
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* @phy_ap_shm: Physical/Mapped representation of the shared memory info
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* @old_msg_tail: Old msg tail ptr, until AP has handled ACK's from CP
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*/
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struct iosm_protocol {
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struct ipc_protocol_ap_shm *p_ap_shm;
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struct iosm_pm pm;
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struct iosm_pcie *pcie;
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struct iosm_imem *imem;
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struct ipc_rsp *rsp_ring[IPC_MEM_MSG_ENTRIES];
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struct device *dev;
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dma_addr_t phy_ap_shm;
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u32 old_msg_tail;
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};
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/**
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* struct ipc_call_msg_send_args - Structure for message argument for
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* tasklet function.
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* @prep_args: Arguments for message preparation function
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* @response: Can be NULL if result can be ignored
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* @msg_type: Message Type
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*/
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struct ipc_call_msg_send_args {
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union ipc_msg_prep_args *prep_args;
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struct ipc_rsp *response;
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enum ipc_msg_prep_type msg_type;
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};
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/**
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* ipc_protocol_tq_msg_send - prepare the msg and send to CP
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* @ipc_protocol: Pointer to ipc_protocol instance
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* @msg_type: Message type
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* @prep_args: Message arguments
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* @response: Pointer to a response object which has a
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* completion object and return code.
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*
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* Returns: 0 on success and failure value on error
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*/
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int ipc_protocol_tq_msg_send(struct iosm_protocol *ipc_protocol,
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enum ipc_msg_prep_type msg_type,
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union ipc_msg_prep_args *prep_args,
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struct ipc_rsp *response);
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/**
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* ipc_protocol_msg_send - Send ipc control message to CP and wait for response
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* @ipc_protocol: Pointer to ipc_protocol instance
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* @prep: Message type
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* @prep_args: Message arguments
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*
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* Returns: 0 on success and failure value on error
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*/
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int ipc_protocol_msg_send(struct iosm_protocol *ipc_protocol,
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enum ipc_msg_prep_type prep,
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union ipc_msg_prep_args *prep_args);
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/**
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* ipc_protocol_suspend - Signal to CP that host wants to go to sleep (suspend).
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* @ipc_protocol: Pointer to ipc_protocol instance
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*
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* Returns: true if host can suspend, false if suspend must be aborted.
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*/
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bool ipc_protocol_suspend(struct iosm_protocol *ipc_protocol);
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/**
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* ipc_protocol_s2idle_sleep - Call PM function to set PM variables in s2idle
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* sleep/active case
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* @ipc_protocol: Pointer to ipc_protocol instance
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* @sleep: True for sleep/False for active
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*/
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void ipc_protocol_s2idle_sleep(struct iosm_protocol *ipc_protocol, bool sleep);
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/**
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* ipc_protocol_resume - Signal to CP that host wants to resume operation.
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* @ipc_protocol: Pointer to ipc_protocol instance
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*
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* Returns: true if host can resume, false if there is a problem.
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*/
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bool ipc_protocol_resume(struct iosm_protocol *ipc_protocol);
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/**
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* ipc_protocol_pm_dev_sleep_handle - Handles the Device Sleep state change
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* notification.
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* @ipc_protocol: Pointer to ipc_protocol instance.
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*
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* Returns: true if sleep notification handled, false otherwise.
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*/
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bool ipc_protocol_pm_dev_sleep_handle(struct iosm_protocol *ipc_protocol);
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/**
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* ipc_protocol_doorbell_trigger - Wrapper for PM function which wake up the
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* device if it is in low power mode
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* and trigger a head pointer update interrupt.
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* @ipc_protocol: Pointer to ipc_protocol instance.
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* @identifier: Specifies what component triggered hpda
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* update irq
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*/
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void ipc_protocol_doorbell_trigger(struct iosm_protocol *ipc_protocol,
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u32 identifier);
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/**
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* ipc_protocol_sleep_notification_string - Returns last Sleep Notification as
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* string.
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* @ipc_protocol: Instance pointer of Protocol module.
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*
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* Returns: Pointer to string.
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*/
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const char *
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ipc_protocol_sleep_notification_string(struct iosm_protocol *ipc_protocol);
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/**
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* ipc_protocol_init - Allocates IPC protocol instance
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* @ipc_imem: Pointer to iosm_imem structure
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*
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* Returns: Address of IPC protocol instance on success & NULL on failure.
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*/
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struct iosm_protocol *ipc_protocol_init(struct iosm_imem *ipc_imem);
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/**
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* ipc_protocol_deinit - Deallocates IPC protocol instance
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* @ipc_protocol: pointer to the IPC protocol instance
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*/
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void ipc_protocol_deinit(struct iosm_protocol *ipc_protocol);
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#endif
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