diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/arm_ffa.h | 267 | ||||
| -rw-r--r-- | include/linux/reset-controller.h | 22 |
2 files changed, 289 insertions, 0 deletions
diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h new file mode 100644 index 000000000000..505c679b6a9b --- /dev/null +++ b/include/linux/arm_ffa.h @@ -0,0 +1,267 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2021 ARM Ltd. + */ + +#ifndef _LINUX_ARM_FFA_H +#define _LINUX_ARM_FFA_H + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/uuid.h> + +/* FFA Bus/Device/Driver related */ +struct ffa_device { + int vm_id; + bool mode_32bit; + uuid_t uuid; + struct device dev; +}; + +#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) +{ + fdev->dev.driver_data = data; +} + +#if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT) +struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id); +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); +const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev); + +#else +static inline +struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id) +{ + 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; } + +static inline +const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev) +{ + return NULL; +} +#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) + +/* 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) + u32 properties; +}; + +/* 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; + u32 composite_off; + /* + * Offset in bytes from the start of the outer `ffa_memory_region` to + * an `struct ffa_mem_region_addr_range`. + */ + 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) + u8 attributes; + u8 reserved_0; +/* + * 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; + u32 reserved_1; + /* + * The number of `ffa_mem_region_attributes` entries included in this + * transaction. + */ + u32 ep_count; + /* + * An array of endpoint memory access descriptors. + * Each one specifies a memory region offset, an endpoint and the + * attributes with which this memory region should be mapped in that + * endpoint's page table. + */ + struct ffa_mem_region_attributes ep_mem_access[]; +}; + +#define COMPOSITE_OFFSET(x) \ + (offsetof(struct ffa_mem_region, ep_mem_access[x])) +#define CONSTITUENTS_OFFSET(x) \ + (offsetof(struct ffa_composite_mem_region, constituents[x])) +#define COMPOSITE_CONSTITUENTS_OFFSET(x, y) \ + (COMPOSITE_OFFSET(x) + CONSTITUENTS_OFFSET(y)) + +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_dev_ops { + u32 (*api_version_get)(void); + int (*partition_info_get)(const char *uuid_str, + struct ffa_partition_info *buffer); + void (*mode_32bit_set)(struct ffa_device *dev); + int (*sync_send_receive)(struct ffa_device *dev, + struct ffa_send_direct_data *data); + int (*memory_reclaim)(u64 g_handle, u32 flags); + int (*memory_share)(struct ffa_device *dev, + struct ffa_mem_ops_args *args); +}; + +#endif /* _LINUX_ARM_FFA_H */ diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h index ec35814e0bbb..0fa4f60e1186 100644 --- a/include/linux/reset-controller.h +++ b/include/linux/reset-controller.h @@ -79,6 +79,7 @@ struct reset_controller_dev { unsigned int nr_resets; }; +#if IS_ENABLED(CONFIG_RESET_CONTROLLER) int reset_controller_register(struct reset_controller_dev *rcdev); void reset_controller_unregister(struct reset_controller_dev *rcdev); @@ -88,5 +89,26 @@ int devm_reset_controller_register(struct device *dev, void reset_controller_add_lookup(struct reset_control_lookup *lookup, unsigned int num_entries); +#else +static inline int reset_controller_register(struct reset_controller_dev *rcdev) +{ + return 0; +} + +static inline void reset_controller_unregister(struct reset_controller_dev *rcdev) +{ +} + +static inline int devm_reset_controller_register(struct device *dev, + struct reset_controller_dev *rcdev) +{ + return 0; +} + +static inline void reset_controller_add_lookup(struct reset_control_lookup *lookup, + unsigned int num_entries) +{ +} +#endif #endif |