445 lines
12 KiB
C
445 lines
12 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_OPS_H
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#define IOSM_IPC_PROTOCOL_OPS_H
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#define SIZE_MASK 0x00FFFFFF
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#define COMPLETION_STATUS 24
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#define RESET_BIT 7
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/**
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* enum ipc_mem_td_cs - Completion status of a TD
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* @IPC_MEM_TD_CS_INVALID: Initial status - td not yet used.
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* @IPC_MEM_TD_CS_PARTIAL_TRANSFER: More data pending -> next TD used for this
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* @IPC_MEM_TD_CS_END_TRANSFER: IO transfer is complete.
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* @IPC_MEM_TD_CS_OVERFLOW: IO transfer to small for the buff to write
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* @IPC_MEM_TD_CS_ABORT: TD marked as abort and shall be discarded
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* by AP.
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* @IPC_MEM_TD_CS_ERROR: General error.
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*/
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enum ipc_mem_td_cs {
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IPC_MEM_TD_CS_INVALID,
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IPC_MEM_TD_CS_PARTIAL_TRANSFER,
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IPC_MEM_TD_CS_END_TRANSFER,
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IPC_MEM_TD_CS_OVERFLOW,
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IPC_MEM_TD_CS_ABORT,
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IPC_MEM_TD_CS_ERROR,
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};
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/**
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* enum ipc_mem_msg_cs - Completion status of IPC Message
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* @IPC_MEM_MSG_CS_INVALID: Initial status.
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* @IPC_MEM_MSG_CS_SUCCESS: IPC Message completion success.
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* @IPC_MEM_MSG_CS_ERROR: Message send error.
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*/
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enum ipc_mem_msg_cs {
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IPC_MEM_MSG_CS_INVALID,
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IPC_MEM_MSG_CS_SUCCESS,
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IPC_MEM_MSG_CS_ERROR,
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};
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/**
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* struct ipc_msg_prep_args_pipe - struct for pipe args for message preparation
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* @pipe: Pipe to open/close
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*/
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struct ipc_msg_prep_args_pipe {
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struct ipc_pipe *pipe;
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};
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/**
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* struct ipc_msg_prep_args_sleep - struct for sleep args for message
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* preparation
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* @target: 0=host, 1=device
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* @state: 0=enter sleep, 1=exit sleep
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*/
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struct ipc_msg_prep_args_sleep {
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unsigned int target;
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unsigned int state;
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};
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/**
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* struct ipc_msg_prep_feature_set - struct for feature set argument for
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* message preparation
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* @reset_enable: 0=out-of-band, 1=in-band-crash notification
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*/
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struct ipc_msg_prep_feature_set {
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u8 reset_enable;
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};
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/**
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* struct ipc_msg_prep_map - struct for map argument for message preparation
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* @region_id: Region to map
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* @addr: Pcie addr of region to map
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* @size: Size of the region to map
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*/
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struct ipc_msg_prep_map {
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unsigned int region_id;
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unsigned long addr;
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size_t size;
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};
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/**
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* struct ipc_msg_prep_unmap - struct for unmap argument for message preparation
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* @region_id: Region to unmap
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*/
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struct ipc_msg_prep_unmap {
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unsigned int region_id;
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};
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/**
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* struct ipc_msg_prep_args - Union to handle different message types
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* @pipe_open: Pipe open message preparation struct
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* @pipe_close: Pipe close message preparation struct
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* @sleep: Sleep message preparation struct
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* @feature_set: Feature set message preparation struct
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* @map: Memory map message preparation struct
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* @unmap: Memory unmap message preparation struct
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*/
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union ipc_msg_prep_args {
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struct ipc_msg_prep_args_pipe pipe_open;
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struct ipc_msg_prep_args_pipe pipe_close;
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struct ipc_msg_prep_args_sleep sleep;
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struct ipc_msg_prep_feature_set feature_set;
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struct ipc_msg_prep_map map;
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struct ipc_msg_prep_unmap unmap;
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};
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/**
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* enum ipc_msg_prep_type - Enum for message prepare actions
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* @IPC_MSG_PREP_SLEEP: Sleep message preparation type
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* @IPC_MSG_PREP_PIPE_OPEN: Pipe open message preparation type
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* @IPC_MSG_PREP_PIPE_CLOSE: Pipe close message preparation type
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* @IPC_MSG_PREP_FEATURE_SET: Feature set message preparation type
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* @IPC_MSG_PREP_MAP: Memory map message preparation type
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* @IPC_MSG_PREP_UNMAP: Memory unmap message preparation type
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*/
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enum ipc_msg_prep_type {
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IPC_MSG_PREP_SLEEP,
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IPC_MSG_PREP_PIPE_OPEN,
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IPC_MSG_PREP_PIPE_CLOSE,
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IPC_MSG_PREP_FEATURE_SET,
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IPC_MSG_PREP_MAP,
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IPC_MSG_PREP_UNMAP,
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};
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/**
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* struct ipc_rsp - Response to sent message
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* @completion: For waking up requestor
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* @status: Completion status
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*/
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struct ipc_rsp {
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struct completion completion;
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enum ipc_mem_msg_cs status;
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};
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/**
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* enum ipc_mem_msg - Type-definition of the messages.
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* @IPC_MEM_MSG_OPEN_PIPE: AP ->CP: Open a pipe
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* @IPC_MEM_MSG_CLOSE_PIPE: AP ->CP: Close a pipe
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* @IPC_MEM_MSG_ABORT_PIPE: AP ->CP: wait for completion of the
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* running transfer and abort all pending
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* IO-transfers for the pipe
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* @IPC_MEM_MSG_SLEEP: AP ->CP: host enter or exit sleep
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* @IPC_MEM_MSG_FEATURE_SET: AP ->CP: Intel feature configuration
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*/
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enum ipc_mem_msg {
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IPC_MEM_MSG_OPEN_PIPE = 0x01,
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IPC_MEM_MSG_CLOSE_PIPE = 0x02,
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IPC_MEM_MSG_ABORT_PIPE = 0x03,
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IPC_MEM_MSG_SLEEP = 0x04,
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IPC_MEM_MSG_FEATURE_SET = 0xF0,
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};
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/**
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* struct ipc_mem_msg_open_pipe - Message structure for open pipe
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* @tdr_addr: Tdr address
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* @tdr_entries: Tdr entries
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* @pipe_nr: Pipe number
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* @type_of_message: Message type
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* @irq_vector: MSI vector number
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* @accumulation_backoff: Time in usec for data accumalation
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_open_pipe {
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__le64 tdr_addr;
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__le16 tdr_entries;
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u8 pipe_nr;
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u8 type_of_message;
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__le32 irq_vector;
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__le32 accumulation_backoff;
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__le32 completion_status;
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};
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/**
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* struct ipc_mem_msg_close_pipe - Message structure for close pipe
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* @reserved1: Reserved
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* @reserved2: Reserved
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* @pipe_nr: Pipe number
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* @type_of_message: Message type
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* @reserved3: Reserved
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* @reserved4: Reserved
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_close_pipe {
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__le32 reserved1[2];
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__le16 reserved2;
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u8 pipe_nr;
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u8 type_of_message;
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__le32 reserved3;
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__le32 reserved4;
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__le32 completion_status;
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};
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/**
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* struct ipc_mem_msg_abort_pipe - Message structure for abort pipe
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* @reserved1: Reserved
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* @reserved2: Reserved
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* @pipe_nr: Pipe number
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* @type_of_message: Message type
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* @reserved3: Reserved
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* @reserved4: Reserved
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_abort_pipe {
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__le32 reserved1[2];
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__le16 reserved2;
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u8 pipe_nr;
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u8 type_of_message;
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__le32 reserved3;
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__le32 reserved4;
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__le32 completion_status;
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};
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/**
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* struct ipc_mem_msg_host_sleep - Message structure for sleep message.
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* @reserved1: Reserved
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* @target: 0=host, 1=device, host or EP devie
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* is the message target
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* @state: 0=enter sleep, 1=exit sleep,
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* 2=enter sleep no protocol
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* @reserved2: Reserved
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* @type_of_message: Message type
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* @reserved3: Reserved
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* @reserved4: Reserved
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_host_sleep {
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__le32 reserved1[2];
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u8 target;
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u8 state;
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u8 reserved2;
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u8 type_of_message;
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__le32 reserved3;
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__le32 reserved4;
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__le32 completion_status;
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};
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/**
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* struct ipc_mem_msg_feature_set - Message structure for feature_set message
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* @reserved1: Reserved
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* @reserved2: Reserved
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* @reset_enable: 0=out-of-band, 1=in-band-crash notification
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* @type_of_message: Message type
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* @reserved3: Reserved
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* @reserved4: Reserved
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_feature_set {
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__le32 reserved1[2];
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__le16 reserved2;
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u8 reset_enable;
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u8 type_of_message;
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__le32 reserved3;
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__le32 reserved4;
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__le32 completion_status;
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};
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/**
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* struct ipc_mem_msg_common - Message structure for completion status update.
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* @reserved1: Reserved
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* @reserved2: Reserved
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* @type_of_message: Message type
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* @reserved3: Reserved
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* @reserved4: Reserved
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* @completion_status: Message Completion Status
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*/
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struct ipc_mem_msg_common {
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__le32 reserved1[2];
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u8 reserved2[3];
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u8 type_of_message;
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__le32 reserved3;
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__le32 reserved4;
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__le32 completion_status;
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};
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/**
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* union ipc_mem_msg_entry - Union with all possible messages.
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* @open_pipe: Open pipe message struct
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* @close_pipe: Close pipe message struct
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* @abort_pipe: Abort pipe message struct
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* @host_sleep: Host sleep message struct
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* @feature_set: Featuer set message struct
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* @common: Used to access msg_type and to set the completion status
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*/
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union ipc_mem_msg_entry {
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struct ipc_mem_msg_open_pipe open_pipe;
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struct ipc_mem_msg_close_pipe close_pipe;
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struct ipc_mem_msg_abort_pipe abort_pipe;
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struct ipc_mem_msg_host_sleep host_sleep;
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struct ipc_mem_msg_feature_set feature_set;
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struct ipc_mem_msg_common common;
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};
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/* Transfer descriptor definition. */
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struct ipc_protocol_td {
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union {
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/* 0 : 63 - 64-bit address of a buffer in host memory. */
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dma_addr_t address;
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struct {
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/* 0 : 31 - 32 bit address */
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__le32 address;
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/* 32 : 63 - corresponding descriptor */
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__le32 desc;
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} __packed shm;
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} buffer;
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/* 0 - 2nd byte - Size of the buffer.
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* The host provides the size of the buffer queued.
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* The EP device reads this value and shall update
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* it for downlink transfers to indicate the
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* amount of data written in buffer.
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* 3rd byte - This field provides the completion status
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* of the TD. When queuing the TD, the host sets
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* the status to 0. The EP device updates this
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* field when completing the TD.
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*/
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__le32 scs;
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/* 0th - nr of following descriptors
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* 1 - 3rd byte - reserved
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*/
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__le32 next;
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} __packed;
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/**
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* ipc_protocol_msg_prep - Prepare message based upon message type
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* @ipc_imem: iosm_protocol instance
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* @msg_type: message prepare type
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* @args: message arguments
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*
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* Return: 0 on success and failure value on error
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*/
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int ipc_protocol_msg_prep(struct iosm_imem *ipc_imem,
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enum ipc_msg_prep_type msg_type,
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union ipc_msg_prep_args *args);
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/**
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* ipc_protocol_msg_hp_update - Function for head pointer update
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* of message ring
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* @ipc_imem: iosm_protocol instance
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*/
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void ipc_protocol_msg_hp_update(struct iosm_imem *ipc_imem);
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/**
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* ipc_protocol_msg_process - Function for processing responses
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* to IPC messages
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* @ipc_imem: iosm_protocol instance
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* @irq: IRQ vector
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*
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* Return: True on success, false if error
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*/
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bool ipc_protocol_msg_process(struct iosm_imem *ipc_imem, int irq);
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/**
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* ipc_protocol_ul_td_send - Function for sending the data to CP
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* @ipc_protocol: iosm_protocol instance
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* @pipe: Pipe instance
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* @p_ul_list: uplink sk_buff list
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*
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* Return: true in success, false in case of error
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*/
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bool ipc_protocol_ul_td_send(struct iosm_protocol *ipc_protocol,
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struct ipc_pipe *pipe,
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struct sk_buff_head *p_ul_list);
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/**
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* ipc_protocol_ul_td_process - Function for processing the sent data
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
* @pipe: Pipe instance
|
||
|
|
*
|
||
|
|
* Return: sk_buff instance
|
||
|
|
*/
|
||
|
|
struct sk_buff *ipc_protocol_ul_td_process(struct iosm_protocol *ipc_protocol,
|
||
|
|
struct ipc_pipe *pipe);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_dl_td_prepare - Function for providing DL TDs to CP
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
* @pipe: Pipe instance
|
||
|
|
*
|
||
|
|
* Return: true in success, false in case of error
|
||
|
|
*/
|
||
|
|
bool ipc_protocol_dl_td_prepare(struct iosm_protocol *ipc_protocol,
|
||
|
|
struct ipc_pipe *pipe);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_dl_td_process - Function for processing the DL data
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
* @pipe: Pipe instance
|
||
|
|
*
|
||
|
|
* Return: sk_buff instance
|
||
|
|
*/
|
||
|
|
struct sk_buff *ipc_protocol_dl_td_process(struct iosm_protocol *ipc_protocol,
|
||
|
|
struct ipc_pipe *pipe);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_get_head_tail_index - Function for getting Head and Tail
|
||
|
|
* pointer index of given pipe
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
* @pipe: Pipe Instance
|
||
|
|
* @head: head pointer index of the given pipe
|
||
|
|
* @tail: tail pointer index of the given pipe
|
||
|
|
*/
|
||
|
|
void ipc_protocol_get_head_tail_index(struct iosm_protocol *ipc_protocol,
|
||
|
|
struct ipc_pipe *pipe, u32 *head,
|
||
|
|
u32 *tail);
|
||
|
|
/**
|
||
|
|
* ipc_protocol_get_ipc_status - Function for getting the IPC Status
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
*
|
||
|
|
* Return: Returns IPC State
|
||
|
|
*/
|
||
|
|
enum ipc_mem_device_ipc_state ipc_protocol_get_ipc_status(struct iosm_protocol
|
||
|
|
*ipc_protocol);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_pipe_cleanup - Function to cleanup pipe resources
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
* @pipe: Pipe instance
|
||
|
|
*/
|
||
|
|
void ipc_protocol_pipe_cleanup(struct iosm_protocol *ipc_protocol,
|
||
|
|
struct ipc_pipe *pipe);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_get_ap_exec_stage - Function for getting AP Exec Stage
|
||
|
|
* @ipc_protocol: pointer to struct iosm protocol
|
||
|
|
*
|
||
|
|
* Return: returns BOOT Stages
|
||
|
|
*/
|
||
|
|
enum ipc_mem_exec_stage
|
||
|
|
ipc_protocol_get_ap_exec_stage(struct iosm_protocol *ipc_protocol);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ipc_protocol_pm_dev_get_sleep_notification - Function for getting Dev Sleep
|
||
|
|
* notification
|
||
|
|
* @ipc_protocol: iosm_protocol instance
|
||
|
|
*
|
||
|
|
* Return: Returns dev PM State
|
||
|
|
*/
|
||
|
|
u32 ipc_protocol_pm_dev_get_sleep_notification(struct iosm_protocol
|
||
|
|
*ipc_protocol);
|
||
|
|
#endif
|