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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2021 ARM Ltd.
*/
#ifndef _LINUX_ARM_FFA_H
#define _LINUX_ARM_FFA_H
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/uuid.h>
#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))
#define FFA_ERROR FFA_SMC_32(0x60)
#define FFA_SUCCESS FFA_SMC_32(0x61)
#define FFA_FN64_SUCCESS FFA_SMC_64(0x61)
#define FFA_INTERRUPT FFA_SMC_32(0x62)
#define FFA_VERSION FFA_SMC_32(0x63)
#define FFA_FEATURES FFA_SMC_32(0x64)
#define FFA_RX_RELEASE FFA_SMC_32(0x65)
#define FFA_RXTX_MAP FFA_SMC_32(0x66)
#define FFA_FN64_RXTX_MAP FFA_SMC_64(0x66)
#define FFA_RXTX_UNMAP FFA_SMC_32(0x67)
#define FFA_PARTITION_INFO_GET FFA_SMC_32(0x68)
#define FFA_ID_GET FFA_SMC_32(0x69)
#define FFA_MSG_POLL FFA_SMC_32(0x6A)
#define FFA_MSG_WAIT FFA_SMC_32(0x6B)
#define FFA_YIELD FFA_SMC_32(0x6C)
#define FFA_RUN FFA_SMC_32(0x6D)
#define FFA_MSG_SEND FFA_SMC_32(0x6E)
#define FFA_MSG_SEND_DIRECT_REQ FFA_SMC_32(0x6F)
#define FFA_FN64_MSG_SEND_DIRECT_REQ FFA_SMC_64(0x6F)
#define FFA_MSG_SEND_DIRECT_RESP FFA_SMC_32(0x70)
#define FFA_FN64_MSG_SEND_DIRECT_RESP FFA_SMC_64(0x70)
#define FFA_MEM_DONATE FFA_SMC_32(0x71)
#define FFA_FN64_MEM_DONATE FFA_SMC_64(0x71)
#define FFA_MEM_LEND FFA_SMC_32(0x72)
#define FFA_FN64_MEM_LEND FFA_SMC_64(0x72)
#define FFA_MEM_SHARE FFA_SMC_32(0x73)
#define FFA_FN64_MEM_SHARE FFA_SMC_64(0x73)
#define FFA_MEM_RETRIEVE_REQ FFA_SMC_32(0x74)
#define FFA_FN64_MEM_RETRIEVE_REQ FFA_SMC_64(0x74)
#define FFA_MEM_RETRIEVE_RESP FFA_SMC_32(0x75)
#define FFA_MEM_RELINQUISH FFA_SMC_32(0x76)
#define FFA_MEM_RECLAIM FFA_SMC_32(0x77)
#define FFA_MEM_OP_PAUSE FFA_SMC_32(0x78)
#define FFA_MEM_OP_RESUME FFA_SMC_32(0x79)
#define FFA_MEM_FRAG_RX FFA_SMC_32(0x7A)
#define FFA_MEM_FRAG_TX FFA_SMC_32(0x7B)
#define FFA_NORMAL_WORLD_RESUME FFA_SMC_32(0x7C)
#define FFA_NOTIFICATION_BITMAP_CREATE FFA_SMC_32(0x7D)
#define FFA_NOTIFICATION_BITMAP_DESTROY FFA_SMC_32(0x7E)
#define FFA_NOTIFICATION_BIND FFA_SMC_32(0x7F)
#define FFA_NOTIFICATION_UNBIND FFA_SMC_32(0x80)
#define FFA_NOTIFICATION_SET FFA_SMC_32(0x81)
#define FFA_NOTIFICATION_GET FFA_SMC_32(0x82)
#define FFA_NOTIFICATION_INFO_GET FFA_SMC_32(0x83)
#define FFA_FN64_NOTIFICATION_INFO_GET FFA_SMC_64(0x83)
#define FFA_RX_ACQUIRE FFA_SMC_32(0x84)
#define FFA_SPM_ID_GET FFA_SMC_32(0x85)
#define FFA_MSG_SEND2 FFA_SMC_32(0x86)
#define FFA_SECONDARY_EP_REGISTER FFA_SMC_32(0x87)
#define FFA_FN64_SECONDARY_EP_REGISTER FFA_SMC_64(0x87)
#define FFA_MEM_PERM_GET FFA_SMC_32(0x88)
#define FFA_FN64_MEM_PERM_GET FFA_SMC_64(0x88)
#define FFA_MEM_PERM_SET FFA_SMC_32(0x89)
#define FFA_FN64_MEM_PERM_SET FFA_SMC_64(0x89)
/*
* For some calls it is necessary to use SMC64 to pass or return 64-bit values.
* For such calls FFA_FN_NATIVE(name) will choose the appropriate
* (native-width) function ID.
*/
#ifdef CONFIG_64BIT
#define FFA_FN_NATIVE(name) FFA_FN64_##name
#else
#define FFA_FN_NATIVE(name) FFA_##name
#endif
/* FFA error codes. */
#define FFA_RET_SUCCESS (0)
#define FFA_RET_NOT_SUPPORTED (-1)
#define FFA_RET_INVALID_PARAMETERS (-2)
#define FFA_RET_NO_MEMORY (-3)
#define FFA_RET_BUSY (-4)
#define FFA_RET_INTERRUPTED (-5)
#define FFA_RET_DENIED (-6)
#define FFA_RET_RETRY (-7)
#define FFA_RET_ABORTED (-8)
#define FFA_RET_NO_DATA (-9)
/* FFA version encoding */
#define FFA_MAJOR_VERSION_MASK GENMASK(30, 16)
#define FFA_MINOR_VERSION_MASK GENMASK(15, 0)
#define FFA_MAJOR_VERSION(x) ((u16)(FIELD_GET(FFA_MAJOR_VERSION_MASK, (x))))
#define FFA_MINOR_VERSION(x) ((u16)(FIELD_GET(FFA_MINOR_VERSION_MASK, (x))))
#define FFA_PACK_VERSION_INFO(major, minor) \
(FIELD_PREP(FFA_MAJOR_VERSION_MASK, (major)) | \
FIELD_PREP(FFA_MINOR_VERSION_MASK, (minor)))
#define FFA_VERSION_1_0 FFA_PACK_VERSION_INFO(1, 0)
#define FFA_VERSION_1_1 FFA_PACK_VERSION_INFO(1, 1)
/**
* FF-A specification mentions explicitly about '4K pages'. This should
* not be confused with the kernel PAGE_SIZE, which is the translation
* granule kernel is configured and may be one among 4K, 16K and 64K.
*/
#define FFA_PAGE_SIZE SZ_4K
/*
* Minimum buffer size/alignment encodings returned by an FFA_FEATURES
* query for FFA_RXTX_MAP.
*/
#define FFA_FEAT_RXTX_MIN_SZ_4K 0
#define FFA_FEAT_RXTX_MIN_SZ_64K 1
#define FFA_FEAT_RXTX_MIN_SZ_16K 2
/* FFA Bus/Device/Driver related */
struct ffa_device {
u32 id;
int vm_id;
bool mode_32bit;
uuid_t uuid;
struct device dev;
const struct ffa_ops *ops;
};
#define to_ffa_dev(d) container_of(d, struct ffa_device, dev)
struct ffa_device_id {
uuid_t uuid;
};
struct ffa_driver {
const char *name;
int (*probe)(struct ffa_device *sdev);
void (*remove)(struct ffa_device *sdev);
const struct ffa_device_id *id_table;
struct device_driver driver;
};
#define to_ffa_driver(d) container_of(d, struct ffa_driver, driver)
static inline void ffa_dev_set_drvdata(struct ffa_device *fdev, void *data)
{
dev_set_drvdata(&fdev->dev, data);
}
static inline void *ffa_dev_get_drvdata(struct ffa_device *fdev)
{
return dev_get_drvdata(&fdev->dev);
}
#if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)
struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id,
const struct ffa_ops *ops);
void ffa_device_unregister(struct ffa_device *ffa_dev);
int ffa_driver_register(struct ffa_driver *driver, struct module *owner,
const char *mod_name);
void ffa_driver_unregister(struct ffa_driver *driver);
bool ffa_device_is_valid(struct ffa_device *ffa_dev);
#else
static inline
struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id,
const struct ffa_ops *ops)
{
return NULL;
}
static inline void ffa_device_unregister(struct ffa_device *dev) {}
static inline int
ffa_driver_register(struct ffa_driver *driver, struct module *owner,
const char *mod_name)
{
return -EINVAL;
}
static inline void ffa_driver_unregister(struct ffa_driver *driver) {}
static inline
bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; }
#endif /* CONFIG_ARM_FFA_TRANSPORT */
#define ffa_register(driver) \
ffa_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
#define ffa_unregister(driver) \
ffa_driver_unregister(driver)
/**
* module_ffa_driver() - Helper macro for registering a psa_ffa driver
* @__ffa_driver: ffa_driver structure
*
* Helper macro for psa_ffa drivers to set up proper module init / exit
* functions. Replaces module_init() and module_exit() and keeps people from
* printing pointless things to the kernel log when their driver is loaded.
*/
#define module_ffa_driver(__ffa_driver) \
module_driver(__ffa_driver, ffa_register, ffa_unregister)
extern struct bus_type ffa_bus_type;
/* FFA transport related */
struct ffa_partition_info {
u16 id;
u16 exec_ctxt;
/* partition supports receipt of direct requests */
#define FFA_PARTITION_DIRECT_RECV BIT(0)
/* partition can send direct requests. */
#define FFA_PARTITION_DIRECT_SEND BIT(1)
/* partition can send and receive indirect messages. */
#define FFA_PARTITION_INDIRECT_MSG BIT(2)
/* partition runs in the AArch64 execution state. */
#define FFA_PARTITION_AARCH64_EXEC BIT(8)
u32 properties;
u32 uuid[4];
};
/* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */
struct ffa_send_direct_data {
unsigned long data0; /* w3/x3 */
unsigned long data1; /* w4/x4 */
unsigned long data2; /* w5/x5 */
unsigned long data3; /* w6/x6 */
unsigned long data4; /* w7/x7 */
};
struct ffa_mem_region_addr_range {
/* The base IPA of the constituent memory region, aligned to 4 kiB */
u64 address;
/* The number of 4 kiB pages in the constituent memory region. */
u32 pg_cnt;
u32 reserved;
};
struct ffa_composite_mem_region {
/*
* The total number of 4 kiB pages included in this memory region. This
* must be equal to the sum of page counts specified in each
* `struct ffa_mem_region_addr_range`.
*/
u32 total_pg_cnt;
/* The number of constituents included in this memory region range */
u32 addr_range_cnt;
u64 reserved;
/** An array of `addr_range_cnt` memory region constituents. */
struct ffa_mem_region_addr_range constituents[];
};
struct ffa_mem_region_attributes {
/* The ID of the VM to which the memory is being given or shared. */
u16 receiver;
/*
* The permissions with which the memory region should be mapped in the
* receiver's page table.
*/
#define FFA_MEM_EXEC BIT(3)
#define FFA_MEM_NO_EXEC BIT(2)
#define FFA_MEM_RW BIT(1)
#define FFA_MEM_RO BIT(0)
u8 attrs;
/*
* Flags used during FFA_MEM_RETRIEVE_REQ and FFA_MEM_RETRIEVE_RESP
* for memory regions with multiple borrowers.
*/
#define FFA_MEM_RETRIEVE_SELF_BORROWER BIT(0)
u8 flag;
/*
* Offset in bytes from the start of the outer `ffa_memory_region` to
* an `struct ffa_mem_region_addr_range`.
*/
u32 composite_off;
u64 reserved;
};
struct ffa_mem_region {
/* The ID of the VM/owner which originally sent the memory region */
u16 sender_id;
#define FFA_MEM_NORMAL BIT(5)
#define FFA_MEM_DEVICE BIT(4)
#define FFA_MEM_WRITE_BACK (3 << 2)
#define FFA_MEM_NON_CACHEABLE (1 << 2)
#define FFA_DEV_nGnRnE (0 << 2)
#define FFA_DEV_nGnRE (1 << 2)
#define FFA_DEV_nGRE (2 << 2)
#define FFA_DEV_GRE (3 << 2)
#define FFA_MEM_NON_SHAREABLE (0)
#define FFA_MEM_OUTER_SHAREABLE (2)
#define FFA_MEM_INNER_SHAREABLE (3)
/* Memory region attributes, upper byte MBZ pre v1.1 */
u16 attributes;
/*
* Clear memory region contents after unmapping it from the sender and
* before mapping it for any receiver.
*/
#define FFA_MEM_CLEAR BIT(0)
/*
* Whether the hypervisor may time slice the memory sharing or retrieval
* operation.
*/
#define FFA_TIME_SLICE_ENABLE BIT(1)
#define FFA_MEM_RETRIEVE_TYPE_IN_RESP (0 << 3)
#define FFA_MEM_RETRIEVE_TYPE_SHARE (1 << 3)
#define FFA_MEM_RETRIEVE_TYPE_LEND (2 << 3)
#define FFA_MEM_RETRIEVE_TYPE_DONATE (3 << 3)
#define FFA_MEM_RETRIEVE_ADDR_ALIGN_HINT BIT(9)
#define FFA_MEM_RETRIEVE_ADDR_ALIGN(x) ((x) << 5)
/* Flags to control behaviour of the transaction. */
u32 flags;
#define HANDLE_LOW_MASK GENMASK_ULL(31, 0)
#define HANDLE_HIGH_MASK GENMASK_ULL(63, 32)
#define HANDLE_LOW(x) ((u32)(FIELD_GET(HANDLE_LOW_MASK, (x))))
#define HANDLE_HIGH(x) ((u32)(FIELD_GET(HANDLE_HIGH_MASK, (x))))
#define PACK_HANDLE(l, h) \
(FIELD_PREP(HANDLE_LOW_MASK, (l)) | FIELD_PREP(HANDLE_HIGH_MASK, (h)))
/*
* A globally-unique ID assigned by the hypervisor for a region
* of memory being sent between VMs.
*/
u64 handle;
/*
* An implementation defined value associated with the receiver and the
* memory region.
*/
u64 tag;
/* Size of each endpoint memory access descriptor, MBZ pre v1.1 */
u32 ep_mem_size;
/*
* The number of `ffa_mem_region_attributes` entries included in this
* transaction.
*/
u32 ep_count;
/*
* 16-byte aligned offset from the base address of this descriptor
* to the first element of the endpoint memory access descriptor array
* Valid only from v1.1
*/
u32 ep_mem_offset;
/* MBZ, valid only from v1.1 */
u32 reserved[3];
};
#define CONSTITUENTS_OFFSET(x) \
(offsetof(struct ffa_composite_mem_region, constituents[x]))
static inline u32
ffa_mem_desc_offset(struct ffa_mem_region *buf, int count, u32 ffa_version)
{
u32 offset = count * sizeof(struct ffa_mem_region_attributes);
/*
* Earlier to v1.1, the endpoint memory descriptor array started at
* offset 32(i.e. offset of ep_mem_offset in the current structure)
*/
if (ffa_version <= FFA_VERSION_1_0)
offset += offsetof(struct ffa_mem_region, ep_mem_offset);
else
offset += sizeof(struct ffa_mem_region);
return offset;
}
struct ffa_mem_ops_args {
bool use_txbuf;
u32 nattrs;
u32 flags;
u64 tag;
u64 g_handle;
struct scatterlist *sg;
struct ffa_mem_region_attributes *attrs;
};
struct ffa_info_ops {
u32 (*api_version_get)(void);
int (*partition_info_get)(const char *uuid_str,
struct ffa_partition_info *buffer);
};
struct ffa_msg_ops {
void (*mode_32bit_set)(struct ffa_device *dev);
int (*sync_send_receive)(struct ffa_device *dev,
struct ffa_send_direct_data *data);
};
struct ffa_mem_ops {
int (*memory_reclaim)(u64 g_handle, u32 flags);
int (*memory_share)(struct ffa_mem_ops_args *args);
int (*memory_lend)(struct ffa_mem_ops_args *args);
};
struct ffa_cpu_ops {
int (*run)(struct ffa_device *dev, u16 vcpu);
};
typedef void (*ffa_sched_recv_cb)(u16 vcpu, bool is_per_vcpu, void *cb_data);
typedef void (*ffa_notifier_cb)(int notify_id, void *cb_data);
struct ffa_notifier_ops {
int (*sched_recv_cb_register)(struct ffa_device *dev,
ffa_sched_recv_cb cb, void *cb_data);
int (*sched_recv_cb_unregister)(struct ffa_device *dev);
int (*notify_request)(struct ffa_device *dev, bool per_vcpu,
ffa_notifier_cb cb, void *cb_data, int notify_id);
int (*notify_relinquish)(struct ffa_device *dev, int notify_id);
int (*notify_send)(struct ffa_device *dev, int notify_id, bool per_vcpu,
u16 vcpu);
};
struct ffa_ops {
const struct ffa_info_ops *info_ops;
const struct ffa_msg_ops *msg_ops;
const struct ffa_mem_ops *mem_ops;
const struct ffa_cpu_ops *cpu_ops;
const struct ffa_notifier_ops *notifier_ops;
};
#endif /* _LINUX_ARM_FFA_H */
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