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arm_ffa.h
/* 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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