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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
*
* Authors:
* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
*/
#ifndef __ARM_FFA_PRV_H
#define __ARM_FFA_PRV_H
#include <mapmem.h>
#include <linux/bitfield.h>
#include <linux/bitops.h>
/* This header is exclusively used by the FF-A Uclass and FF-A driver(s) */
/* Arm FF-A driver name */
#define FFA_DRV_NAME "arm_ffa"
/* The FF-A SMC function definitions */
#if CONFIG_IS_ENABLED(SANDBOX)
/* Providing Arm SMCCC declarations to sandbox */
/**
* struct sandbox_smccc_1_2_regs - emulated SMC call arguments or results
* @a0-a17 argument values from registers 0 to 17
*/
struct sandbox_smccc_1_2_regs {
ulong a0;
ulong a1;
ulong a2;
ulong a3;
ulong a4;
ulong a5;
ulong a6;
ulong a7;
ulong a8;
ulong a9;
ulong a10;
ulong a11;
ulong a12;
ulong a13;
ulong a14;
ulong a15;
ulong a16;
ulong a17;
};
typedef struct sandbox_smccc_1_2_regs ffa_value_t;
#define ARM_SMCCC_FAST_CALL 1UL
#define ARM_SMCCC_OWNER_STANDARD 4
#define ARM_SMCCC_SMC_32 0
#define ARM_SMCCC_SMC_64 1
#define ARM_SMCCC_TYPE_SHIFT 31
#define ARM_SMCCC_CALL_CONV_SHIFT 30
#define ARM_SMCCC_OWNER_MASK 0x3f
#define ARM_SMCCC_OWNER_SHIFT 24
#define ARM_SMCCC_FUNC_MASK 0xffff
#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
(((type) << ARM_SMCCC_TYPE_SHIFT) | \
((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
(((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
((func_num) & ARM_SMCCC_FUNC_MASK))
#else
/* CONFIG_ARM64 */
#include <linux/arm-smccc.h>
typedef struct arm_smccc_1_2_regs ffa_value_t;
#endif
/* Defining the function pointer type for the function executing the FF-A ABIs */
typedef void (*invoke_ffa_fn_t)(ffa_value_t args, ffa_value_t *res);
/* FF-A driver version definitions */
#define MAJOR_VERSION_MASK GENMASK(30, 16)
#define MINOR_VERSION_MASK GENMASK(15, 0)
#define GET_FFA_MAJOR_VERSION(x) \
((u16)(FIELD_GET(MAJOR_VERSION_MASK, (x))))
#define GET_FFA_MINOR_VERSION(x) \
((u16)(FIELD_GET(MINOR_VERSION_MASK, (x))))
#define PACK_VERSION_INFO(major, minor) \
(FIELD_PREP(MAJOR_VERSION_MASK, (major)) | \
FIELD_PREP(MINOR_VERSION_MASK, (minor)))
#define FFA_MAJOR_VERSION (1)
#define FFA_MINOR_VERSION (0)
#define FFA_VERSION_1_0 \
PACK_VERSION_INFO(FFA_MAJOR_VERSION, FFA_MINOR_VERSION)
/* Endpoint ID mask (u-boot endpoint ID) */
#define GET_SELF_ENDPOINT_ID_MASK GENMASK(15, 0)
#define GET_SELF_ENDPOINT_ID(x) \
((u16)(FIELD_GET(GET_SELF_ENDPOINT_ID_MASK, (x))))
#define PREP_SELF_ENDPOINT_ID_MASK GENMASK(31, 16)
#define PREP_SELF_ENDPOINT_ID(x) \
(FIELD_PREP(PREP_SELF_ENDPOINT_ID_MASK, (x)))
/* Partition endpoint ID mask (partition with which u-boot communicates with) */
#define PREP_PART_ENDPOINT_ID_MASK GENMASK(15, 0)
#define PREP_PART_ENDPOINT_ID(x) \
(FIELD_PREP(PREP_PART_ENDPOINT_ID_MASK, (x)))
/* Definitions of the Arm FF-A interfaces supported by the Arm FF-A driver */
#define FFA_SMC(calling_convention, func_num) \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, (calling_convention), \
ARM_SMCCC_OWNER_STANDARD, (func_num))
#define FFA_SMC_32(func_num) FFA_SMC(ARM_SMCCC_SMC_32, (func_num))
#define FFA_SMC_64(func_num) FFA_SMC(ARM_SMCCC_SMC_64, (func_num))
enum ffa_abis {
FFA_ERROR = 0x60,
FFA_SUCCESS = 0x61,
FFA_INTERRUPT = 0x62,
FFA_VERSION = 0x63,
FFA_FEATURES = 0x64,
FFA_RX_RELEASE = 0x65,
FFA_RXTX_MAP = 0x66,
FFA_RXTX_UNMAP = 0x67,
FFA_PARTITION_INFO_GET = 0x68,
FFA_ID_GET = 0x69,
FFA_RUN = 0x6d,
FFA_MSG_SEND_DIRECT_REQ = 0x6f,
FFA_MSG_SEND_DIRECT_RESP = 0x70,
/* To be updated when adding new FFA IDs */
FFA_FIRST_ID = FFA_ERROR, /* Lowest number ID */
FFA_LAST_ID = FFA_MSG_SEND_DIRECT_RESP, /* Highest number ID */
};
enum ffa_abi_errcode {
NOT_SUPPORTED = 1,
INVALID_PARAMETERS,
NO_MEMORY,
BUSY,
INTERRUPTED,
DENIED,
RETRY,
ABORTED,
MAX_NUMBER_FFA_ERR
};
extern int ffa_to_std_errmap[MAX_NUMBER_FFA_ERR];
/* Container structure and helper macros to map between an FF-A error and relevant error log */
struct ffa_abi_errmap {
char *err_str[MAX_NUMBER_FFA_ERR];
};
#define FFA_ERRMAP_COUNT (FFA_LAST_ID - FFA_FIRST_ID + 1)
#define FFA_ID_TO_ERRMAP_ID(ffa_id) ((ffa_id) - FFA_FIRST_ID)
/**
* enum ffa_rxtx_buf_sizes - minimum sizes supported
* for the RX/TX buffers
*/
enum ffa_rxtx_buf_sizes {
RXTX_4K,
RXTX_64K,
RXTX_16K
};
/**
* struct ffa_rxtxpair - Hosts the RX/TX buffers virtual addresses
* @rxbuf: virtual address of the RX buffer
* @txbuf: virtual address of the TX buffer
* @rxtx_min_pages: RX/TX buffers minimum size in pages
*
* Hosts the virtual addresses of the mapped RX/TX buffers
* These addresses are used by the FF-A functions that use the RX/TX buffers
*/
struct ffa_rxtxpair {
void *rxbuf; /* Virtual address returned by memalign */
void *txbuf; /* Virtual address returned by memalign */
size_t rxtx_min_pages; /* Minimum number of pages in each of the RX/TX buffers */
};
struct ffa_partition_desc;
/**
* struct ffa_partitions - descriptors for all secure partitions
* @count: The number of partitions descriptors
* @descs The partitions descriptors table
*
* Contains the partitions descriptors table
*/
struct ffa_partitions {
u32 count;
struct ffa_partition_desc *descs; /* Virtual address */
};
/**
* struct ffa_priv - the driver private data structure
*
* @fwk_version: FF-A framework version
* @emul: FF-A sandbox emulator
* @id: u-boot endpoint ID
* @partitions: The partitions descriptors structure
* @pair: The RX/TX buffers pair
*
* The device private data structure containing all the
* data read from secure world.
*/
struct ffa_priv {
u32 fwk_version;
struct udevice *emul;
u16 id;
struct ffa_partitions partitions;
struct ffa_rxtxpair pair;
};
/**
* ffa_get_version_hdlr() - FFA_VERSION handler function
* @dev: The FF-A bus device
*
* Implement FFA_VERSION FF-A function
* to get from the secure world the FF-A framework version
* FFA_VERSION is used to discover the FF-A framework.
*
* Return:
*
* 0 on success. Otherwise, failure
*/
int ffa_get_version_hdlr(struct udevice *dev);
/**
* invoke_ffa_fn() - SMC wrapper
* @args: FF-A ABI arguments to be copied to Xn registers
* @res: FF-A ABI return data to be copied from Xn registers
*
* Calls low level SMC implementation.
* This function should be implemented by the user driver.
*/
void invoke_ffa_fn(ffa_value_t args, ffa_value_t *res);
#endif
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