mirror of https://gitee.com/openkylin/linux.git
281 lines
9.9 KiB
C
281 lines
9.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2020 Linaro Ltd.
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*/
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#ifndef _IPA_DATA_H_
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#define _IPA_DATA_H_
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#include <linux/types.h>
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#include "ipa_version.h"
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#include "ipa_endpoint.h"
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#include "ipa_mem.h"
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/**
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* DOC: IPA/GSI Configuration Data
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*
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* Boot-time configuration data is used to define the configuration of the
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* IPA and GSI resources to use for a given platform. This data is supplied
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* via the Device Tree match table, associated with a particular compatible
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* string. The data defines information about resources, endpoints, and
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* channels.
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*
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* Resources are data structures used internally by the IPA hardware. The
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* configuration data defines the number (or limits of the number) of various
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* types of these resources.
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*
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* Endpoint configuration data defines properties of both IPA endpoints and
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* GSI channels. A channel is a GSI construct, and represents a single
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* communication path between the IPA and a particular execution environment
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* (EE), such as the AP or Modem. Each EE has a set of channels associated
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* with it, and each channel has an ID unique for that EE. For the most part
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* the only GSI channels of concern to this driver belong to the AP
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*
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* An endpoint is an IPA construct representing a single channel anywhere
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* in the system. An IPA endpoint ID maps directly to an (EE, channel_id)
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* pair. Generally, this driver is concerned with only endpoints associated
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* with the AP, however this will change when support for routing (etc.) is
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* added. IPA endpoint and GSI channel configuration data are defined
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* together, establishing the endpoint_id->(EE, channel_id) mapping.
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*
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* Endpoint configuration data consists of three parts: properties that
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* are common to IPA and GSI (EE ID, channel ID, endpoint ID, and direction);
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* properties associated with the GSI channel; and properties associated with
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* the IPA endpoint.
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*/
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/* The maximum value returned by ipa_resource_group_count() */
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#define IPA_RESOURCE_GROUP_COUNT 4
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/** enum ipa_resource_type_src - source resource types */
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/**
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* struct gsi_channel_data - GSI channel configuration data
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* @tre_count: number of TREs in the channel ring
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* @event_count: number of slots in the associated event ring
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* @tlv_count: number of entries in channel's TLV FIFO
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*
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* A GSI channel is a unidirectional means of transferring data to or
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* from (and through) the IPA. A GSI channel has a ring buffer made
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* up of "transfer elements" (TREs) that specify individual data transfers
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* or IPA immediate commands. TREs are filled by the AP, and control
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* is passed to IPA hardware by writing the last written element
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* into a doorbell register.
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*
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* When data transfer commands have completed the GSI generates an
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* event (a structure of data) and optionally signals the AP with
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* an interrupt. Event structures are implemented by another ring
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* buffer, directed toward the AP from the IPA.
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*
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* The input to a GSI channel is a FIFO of type/length/value (TLV)
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* elements, and the size of this FIFO limits the number of TREs
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* that can be included in a single transaction.
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*/
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struct gsi_channel_data {
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u16 tre_count;
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u16 event_count;
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u8 tlv_count;
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};
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/**
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* struct ipa_endpoint_tx_data - configuration data for TX endpoints
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* @status_endpoint: endpoint to which status elements are sent
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* @delay: whether endpoint starts in delay mode
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*
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* Delay mode prevents a TX endpoint from transmitting anything, even if
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* commands have been presented to the hardware. Once the endpoint exits
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* delay mode, queued transfer commands are sent.
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*
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* The @status_endpoint is only valid if the endpoint's @status_enable
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* flag is set.
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*/
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struct ipa_endpoint_tx_data {
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enum ipa_endpoint_name status_endpoint;
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bool delay;
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};
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/**
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* struct ipa_endpoint_rx_data - configuration data for RX endpoints
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* @pad_align: power-of-2 boundary to which packet payload is aligned
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* @aggr_close_eof: whether aggregation closes on end-of-frame
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*
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* With each packet it transfers, the IPA hardware can perform certain
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* transformations of its packet data. One of these is adding pad bytes
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* to the end of the packet data so the result ends on a power-of-2 boundary.
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*
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* It is also able to aggregate multiple packets into a single receive buffer.
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* Aggregation is "open" while a buffer is being filled, and "closes" when
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* certain criteria are met. One of those criteria is the sender indicating
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* a "frame" consisting of several transfers has ended.
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*/
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struct ipa_endpoint_rx_data {
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u32 pad_align;
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bool aggr_close_eof;
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};
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/**
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* struct ipa_endpoint_config_data - IPA endpoint hardware configuration
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* @checksum: whether checksum offload is enabled
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* @qmap: whether endpoint uses QMAP protocol
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* @aggregation: whether endpoint supports aggregation
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* @status_enable: whether endpoint uses status elements
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* @dma_mode: whether endpoint operates in DMA mode
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* @dma_endpoint: peer endpoint, if operating in DMA mode
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* @tx: TX-specific endpoint information (see above)
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* @rx: RX-specific endpoint information (see above)
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*/
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struct ipa_endpoint_config_data {
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bool checksum;
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bool qmap;
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bool aggregation;
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bool status_enable;
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bool dma_mode;
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enum ipa_endpoint_name dma_endpoint;
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union {
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struct ipa_endpoint_tx_data tx;
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struct ipa_endpoint_rx_data rx;
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};
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};
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/**
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* struct ipa_endpoint_data - IPA endpoint configuration data
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* @filter_support: whether endpoint supports filtering
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* @seq_type: hardware sequencer type used for endpoint
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* @config: hardware configuration (see above)
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*
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* Not all endpoints support the IPA filtering capability. A filter table
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* defines the filters to apply for those endpoints that support it. The
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* AP is responsible for initializing this table, and it must include entries
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* for non-AP endpoints. For this reason we define *all* endpoints used
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* in the system, and indicate whether they support filtering.
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*
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* The remaining endpoint configuration data applies only to AP endpoints.
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* The IPA hardware is implemented by sequencers, and the AP must program
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* the type(s) of these sequencers at initialization time. The remaining
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* endpoint configuration data is defined above.
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*/
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struct ipa_endpoint_data {
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bool filter_support;
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/* The next two are specified only for AP endpoints */
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enum ipa_seq_type seq_type;
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struct ipa_endpoint_config_data config;
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};
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/**
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* struct ipa_gsi_endpoint_data - GSI channel/IPA endpoint data
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* ee: GSI execution environment ID
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* channel_id: GSI channel ID
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* endpoint_id: IPA endpoint ID
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* toward_ipa: direction of data transfer
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* gsi: GSI channel configuration data (see above)
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* ipa: IPA endpoint configuration data (see above)
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*/
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struct ipa_gsi_endpoint_data {
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u8 ee_id; /* enum gsi_ee_id */
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u8 channel_id;
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u8 endpoint_id;
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bool toward_ipa;
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struct gsi_channel_data channel;
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struct ipa_endpoint_data endpoint;
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};
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/** enum ipa_resource_type_src - source resource types */
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enum ipa_resource_type_src {
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IPA_RESOURCE_TYPE_SRC_PKT_CONTEXTS,
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IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_LISTS,
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IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_BUFF,
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IPA_RESOURCE_TYPE_SRC_HPS_DMARS,
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IPA_RESOURCE_TYPE_SRC_ACK_ENTRIES,
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};
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/** enum ipa_resource_type_dst - destination resource types */
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enum ipa_resource_type_dst {
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IPA_RESOURCE_TYPE_DST_DATA_SECTORS,
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IPA_RESOURCE_TYPE_DST_DPS_DMARS,
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};
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/**
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* struct ipa_resource_limits - minimum and maximum resource counts
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* @min: minimum number of resources of a given type
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* @max: maximum number of resources of a given type
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*/
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struct ipa_resource_limits {
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u32 min;
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u32 max;
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};
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/**
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* struct ipa_resource_src - source endpoint group resource usage
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* @type: source group resource type
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* @limits: array of limits to use for each resource group
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*/
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struct ipa_resource_src {
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enum ipa_resource_type_src type;
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struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_COUNT];
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};
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/**
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* struct ipa_resource_dst - destination endpoint group resource usage
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* @type: destination group resource type
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* @limits: array of limits to use for each resource group
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*/
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struct ipa_resource_dst {
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enum ipa_resource_type_dst type;
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struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_COUNT];
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};
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/**
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* struct ipa_resource_data - IPA resource configuration data
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* @resource_src_count: number of entries in the resource_src array
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* @resource_src: source endpoint group resources
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* @resource_dst_count: number of entries in the resource_dst array
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* @resource_dst: destination endpoint group resources
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*
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* In order to manage quality of service between endpoints, certain resources
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* required for operation are allocated to groups of endpoints. Generally
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* this information is invisible to the AP, but the AP is responsible for
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* programming it at initialization time, so we specify it here.
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*/
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struct ipa_resource_data {
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u32 resource_src_count;
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const struct ipa_resource_src *resource_src;
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u32 resource_dst_count;
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const struct ipa_resource_dst *resource_dst;
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};
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/**
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* struct ipa_mem - IPA-local memory region description
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* @offset: offset in IPA memory space to base of the region
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* @size: size in bytes base of the region
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* @canary_count: number of 32-bit "canary" values that precede region
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*/
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struct ipa_mem_data {
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u32 offset;
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u16 size;
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u16 canary_count;
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};
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/**
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* struct ipa_data - combined IPA/GSI configuration data
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* @version: IPA hardware version
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* @endpoint_count: number of entries in endpoint_data array
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* @endpoint_data: IPA endpoint/GSI channel data
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* @resource_data: IPA resource configuration data
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* @mem_count: number of entries in mem_data array
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* @mem_data: IPA-local shared memory region data
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*/
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struct ipa_data {
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enum ipa_version version;
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u32 endpoint_count; /* # entries in endpoint_data[] */
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const struct ipa_gsi_endpoint_data *endpoint_data;
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const struct ipa_resource_data *resource_data;
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u32 mem_count; /* # entries in mem_data[] */
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const struct ipa_mem *mem_data;
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};
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extern const struct ipa_data ipa_data_sdm845;
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extern const struct ipa_data ipa_data_sc7180;
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#endif /* _IPA_DATA_H_ */
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