/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright ( C ) 2019 - 2024 Linaro Ltd .
*/
#ifndef _IPA_DATA_H_
#define _IPA_DATA_H_
#include <linux/types.h>
#include "ipa_endpoint.h"
#include "ipa_mem.h"
#include "ipa_version.h"
/**
* DOC : IPA / GSI Configuration Data
*
* Boot - time configuration data is used to define the configuration of the
* IPA and GSI resources to use for a given platform . This data is supplied
* via the Device Tree match table , associated with a particular compatible
* string . The data defines information about how resources , endpoints and
* channels , memory , power and so on are allocated and used for the
* platform .
*
* Resources are data structures used internally by the IPA hardware . The
* configuration data defines the number ( or limits of the number ) of various
* types of these resources .
*
* Endpoint configuration data defines properties of both IPA endpoints and
* GSI channels . A channel is a GSI construct , and represents a single
* communication path between the IPA and a particular execution environment
* ( EE ) , such as the AP or Modem . Each EE has a set of channels associated
* with it , and each channel has an ID unique for that EE . For the most part
* the only GSI channels of concern to this driver belong to the AP .
*
* An endpoint is an IPA construct representing a single channel anywhere
* in the system . An IPA endpoint ID maps directly to an ( EE , channel_id )
* pair . Generally , this driver is concerned with only endpoints associated
* with the AP , however this will change when support for routing ( etc . ) is
* added . IPA endpoint and GSI channel configuration data are defined
* together , establishing the endpoint_id - > ( EE , channel_id ) mapping .
*
* Endpoint configuration data consists of three parts : properties that
* are common to IPA and GSI ( EE ID , channel ID , endpoint ID , and direction ) ;
* properties associated with the GSI channel ; and properties associated with
* the IPA endpoint .
*/
/* The maximum possible number of source or destination resource groups */
#define IPA_RESOURCE_GROUP_MAX 8
/** enum ipa_qsb_master_id - array index for IPA QSB configuration data */
enum ipa_qsb_master_id {
IPA_QSB_MASTER_DDR,
IPA_QSB_MASTER_PCIE,
};
/**
* struct ipa_qsb_data - Qualcomm System Bus configuration data
* @ max_writes : Maximum outstanding write requests for this master
* @ max_reads : Maximum outstanding read requests for this master
* @ max_reads_beats : Max outstanding read bytes in 8 - byte " beats " ( if non - zero )
*/
struct ipa_qsb_data {
u8 max_writes;
u8 max_reads;
u8 max_reads_beats; /* Not present for IPA v3.5.1 */
};
/**
* struct gsi_channel_data - GSI channel configuration data
* @ tre_count : number of TREs in the channel ring
* @ event_count : number of slots in the associated event ring
* @ tlv_count : number of entries in channel ' s TLV FIFO
*
* A GSI channel is a unidirectional means of transferring data to or
* from ( and through ) the IPA . A GSI channel has a ring buffer made
* up of " transfer ring elements " ( TREs ) that specify individual data
* transfers or IPA immediate commands . TREs are filled by the AP ,
* and control is passed to IPA hardware by writing the last written
* element into a doorbell register .
*
* When data transfer commands have completed the GSI generates an
* event ( a structure of data ) and optionally signals the AP with
* an interrupt . Event structures are implemented by another ring
* buffer , directed toward the AP from the IPA .
*
* The input to a GSI channel is a FIFO of type / length / value ( TLV )
* elements , and the size of this FIFO limits the number of TREs
* that can be included in a single transaction .
*/
struct gsi_channel_data {
u16 tre_count; /* must be a power of 2 */
u16 event_count; /* must be a power of 2 */
u8 tlv_count;
};
/**
* struct ipa_endpoint_data - IPA endpoint configuration data
* @ filter_support : whether endpoint supports filtering
* @ config : hardware configuration
*
* Not all endpoints support the IPA filtering capability . A filter table
* defines the filters to apply for those endpoints that support it . The
* AP is responsible for initializing this table , and it must include entries
* for non - AP endpoints . For this reason we define * all * endpoints used
* in the system , and indicate whether they support filtering .
*
* The remaining endpoint configuration data specifies default hardware
* configuration values that apply only to AP endpoints .
*/
struct ipa_endpoint_data {
bool filter_support;
struct ipa_endpoint_config config;
};
/**
* struct ipa_gsi_endpoint_data - GSI channel / IPA endpoint data
* @ ee_id : GSI execution environment ID
* @ channel_id : GSI channel ID
* @ endpoint_id : IPA endpoint ID
* @ toward_ipa : direction of data transfer
* @ channel : GSI channel configuration data ( see above )
* @ endpoint : IPA endpoint configuration data ( see above )
*/
struct ipa_gsi_endpoint_data {
u8 ee_id; /* enum gsi_ee_id */
u8 channel_id;
u8 endpoint_id;
bool toward_ipa;
struct gsi_channel_data channel;
struct ipa_endpoint_data endpoint;
};
/**
* struct ipa_resource_limits - minimum and maximum resource counts
* @ min : minimum number of resources of a given type
* @ max : maximum number of resources of a given type
*/
struct ipa_resource_limits {
u32 min;
u32 max;
};
/**
* struct ipa_resource - resource group source or destination resource usage
* @ limits : array of resource limits , indexed by group
*/
struct ipa_resource {
struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_MAX];
};
/**
* struct ipa_resource_data - IPA resource configuration data
* @ rsrc_group_src_count : number of source resource groups supported
* @ rsrc_group_dst_count : number of destination resource groups supported
* @ resource_src_count : number of entries in the resource_src array
* @ resource_src : source endpoint group resources
* @ resource_dst_count : number of entries in the resource_dst array
* @ resource_dst : destination endpoint group resources
*
* In order to manage quality of service between endpoints , certain resources
* required for operation are allocated to groups of endpoints . Generally
* this information is invisible to the AP , but the AP is responsible for
* programming it at initialization time , so we specify it here .
*/
struct ipa_resource_data {
u32 rsrc_group_src_count;
u32 rsrc_group_dst_count;
u32 resource_src_count;
const struct ipa_resource *resource_src;
u32 resource_dst_count;
const struct ipa_resource *resource_dst;
};
/**
* struct ipa_mem_data - description of IPA memory regions
* @ local_count : number of regions defined in the local [ ] array
* @ local : array of IPA - local memory region descriptors
* @ imem_addr : physical address of IPA region within IMEM
* @ imem_size : size in bytes of IPA IMEM region
* @ smem_size : size in bytes of the IPA SMEM region
*/
struct ipa_mem_data {
u32 local_count;
const struct ipa_mem *local;
u32 imem_addr;
u32 imem_size;
u32 smem_size;
};
/**
* struct ipa_interconnect_data - description of IPA interconnect bandwidths
* @ name : Interconnect name ( matches interconnect - name in DT )
* @ peak_bandwidth : Peak interconnect bandwidth ( in 1000 byte / sec units )
* @ average_bandwidth : Average interconnect bandwidth ( in 1000 byte / sec units )
*/
struct ipa_interconnect_data {
const char *name;
u32 peak_bandwidth;
u32 average_bandwidth;
};
/**
* struct ipa_power_data - description of IPA power configuration data
* @ core_clock_rate : Core clock rate ( Hz )
* @ interconnect_count : Number of entries in the interconnect_data array
* @ interconnect_data : IPA interconnect configuration data
*/
struct ipa_power_data {
u32 core_clock_rate;
u32 interconnect_count; /* # entries in interconnect_data[] */
const struct ipa_interconnect_data *interconnect_data;
};
/**
* struct ipa_data - combined IPA / GSI configuration data
* @ version : IPA hardware version
* @ backward_compat : BCR register value ( prior to IPA v4 . 5 only )
* @ qsb_count : number of entries in the qsb_data array
* @ qsb_data : Qualcomm System Bus configuration data
* @ modem_route_count : number of modem entries in a routing table
* @ endpoint_count : number of entries in the endpoint_data array
* @ endpoint_data : IPA endpoint / GSI channel data
* @ resource_data : IPA resource configuration data
* @ mem_data : IPA memory region data
* @ power_data : IPA power data
*/
struct ipa_data {
enum ipa_version version;
u32 backward_compat;
u32 qsb_count; /* number of entries in qsb_data[] */
const struct ipa_qsb_data *qsb_data;
u32 modem_route_count;
u32 endpoint_count; /* number of entries in endpoint_data[] */
const struct ipa_gsi_endpoint_data *endpoint_data;
const struct ipa_resource_data *resource_data;
const struct ipa_mem_data *mem_data;
const struct ipa_power_data *power_data;
};
extern const struct ipa_data ipa_data_v3_1;
extern const struct ipa_data ipa_data_v3_5_1;
extern const struct ipa_data ipa_data_v4_2;
extern const struct ipa_data ipa_data_v4_5;
extern const struct ipa_data ipa_data_v4_7;
extern const struct ipa_data ipa_data_v4_9;
extern const struct ipa_data ipa_data_v4_11;
extern const struct ipa_data ipa_data_v5_0;
extern const struct ipa_data ipa_data_v5_5;
#endif /* _IPA_DATA_H_ */
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