/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright ( C ) 2019 - 2024 Linaro Ltd .
*/
#ifndef _IPA_MEM_H_
#define _IPA_MEM_H_
#include <linux/types.h>
struct platform_device;
struct ipa;
struct ipa_mem_data;
/**
* DOC : IPA Local Memory
*
* The IPA has a block of shared memory , divided into regions used for
* specific purposes .
*
* The regions within the shared block are bounded by an offset ( relative to
* the " ipa - shared " memory range ) and size found in the IPA_SHARED_MEM_SIZE
* register .
*
* Each region is optionally preceded by one or more 32 - bit " canary " values .
* These are meant to detect out - of - range writes ( if they become corrupted ) .
* A given region ( such as a filter or routing table ) has the same number
* of canaries for all IPA hardware versions . Still , the number used is
* defined in the config data , allowing for generic handling of regions .
*
* The set of memory regions is defined in configuration data . They are
* subject to these constraints :
* - a zero offset and zero size represents and undefined region
* - a region ' s size does not include space for its " canary " values
* - a region ' s offset is defined to be * past * all " canary " values
* - offset must be large enough to account for all canaries
* - a region ' s size may be zero , but may still have canaries
* - all offsets must be 8 - byte aligned
* - most sizes must be a multiple of 8
* - modem memory size must be a multiple of 4
* - the microcontroller ring offset must be a multiple of 1024
*/
/* The maximum allowed size for any memory region */
#define IPA_MEM_MAX (2 * PAGE_SIZE)
/* IPA-resident memory region ids */
enum ipa_mem_id {
IPA_MEM_UC_SHARED, /* 0 canaries */
IPA_MEM_UC_INFO, /* 0 canaries */
IPA_MEM_V4_FILTER_HASHED, /* 2 canaries */
IPA_MEM_V4_FILTER, /* 2 canaries */
IPA_MEM_V6_FILTER_HASHED, /* 2 canaries */
IPA_MEM_V6_FILTER, /* 2 canaries */
IPA_MEM_V4_ROUTE_HASHED, /* 2 canaries */
IPA_MEM_V4_ROUTE, /* 2 canaries */
IPA_MEM_V6_ROUTE_HASHED, /* 2 canaries */
IPA_MEM_V6_ROUTE, /* 2 canaries */
IPA_MEM_MODEM_HEADER, /* 2 canaries */
IPA_MEM_AP_HEADER, /* 0 canaries, optional */
IPA_MEM_MODEM_PROC_CTX, /* 2 canaries */
IPA_MEM_AP_PROC_CTX, /* 0 canaries */
IPA_MEM_MODEM, /* 0/2 canaries */
IPA_MEM_UC_EVENT_RING, /* 1 canary, optional */
IPA_MEM_PDN_CONFIG, /* 0/2 canaries (IPA v4.0+) */
IPA_MEM_STATS_QUOTA_MODEM, /* 2/4 canaries (IPA v4.0+) */
IPA_MEM_STATS_QUOTA_AP, /* 0 canaries, optional (IPA v4.0+) */
IPA_MEM_STATS_TETHERING, /* 0 canaries, optional (IPA v4.0+) */
IPA_MEM_STATS_DROP, /* 0 canaries, optional (IPA v4.0+) */
/* The next 7 filter and route statistics regions are optional */
IPA_MEM_STATS_V4_FILTER, /* 0 canaries (IPA v4.0-v4.2) */
IPA_MEM_STATS_V6_FILTER, /* 0 canaries (IPA v4.0-v4.2) */
IPA_MEM_STATS_V4_ROUTE, /* 0 canaries (IPA v4.0-v4.2) */
IPA_MEM_STATS_V6_ROUTE, /* 0 canaries (IPA v4.0-v4.2) */
IPA_MEM_AP_V4_FILTER, /* 2 canaries (IPA v5.0) */
IPA_MEM_AP_V6_FILTER, /* 0 canaries (IPA v5.0) */
IPA_MEM_STATS_FILTER_ROUTE, /* 0 canaries (IPA v4.5+) */
IPA_MEM_NAT_TABLE, /* 4 canaries, optional (IPA v4.5+) */
IPA_MEM_END_MARKER, /* 1 canary (not a real region) */
IPA_MEM_COUNT, /* Number of regions (not an index) */
};
/**
* struct ipa_mem - IPA local memory region description
* @ id : memory region identifier
* @ offset : offset in IPA memory space to base of the region
* @ size : size in bytes base of the region
* @ canary_count : Number of 32 - bit " canary " values that precede region
*/
struct ipa_mem {
enum ipa_mem_id id;
u32 offset;
u16 size;
u16 canary_count;
};
const struct ipa_mem *ipa_mem_find(struct ipa *ipa, enum ipa_mem_id mem_id);
int ipa_mem_config(struct ipa *ipa);
void ipa_mem_deconfig(struct ipa *ipa);
int ipa_mem_setup(struct ipa *ipa); /* No ipa_mem_teardown() needed */
int ipa_mem_zero_modem(struct ipa *ipa);
int ipa_mem_init(struct ipa *ipa, struct platform_device *pdev,
const struct ipa_mem_data *mem_data);
void ipa_mem_exit(struct ipa *ipa);
#endif /* _IPA_MEM_H_ */
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