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https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
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6fe437cfe2
Currently, ffa_dev->properties is set after the ffa_device_register()
call return in ffa_setup_partitions(). This could potentially result in
a race where the partition's properties is accessed while probing
struct ffa_device before it is set.
Update the ffa_device_register() to receive ffa_partition_info so all
the data from the partition information received from the firmware can
be updated into the struct ffa_device before the calling device_register()
in ffa_device_register().
Fixes: e781858488 ("firmware: arm_ffa: Add initial FFA bus support for device enumeration")
Signed-off-by: Levi Yun <yeoreum.yun@arm.com>
Message-Id: <20241203143109.1030514-2-yeoreum.yun@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
479 lines
15 KiB
C
479 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2021 ARM Ltd.
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*/
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#ifndef _LINUX_ARM_FFA_H
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#define _LINUX_ARM_FFA_H
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#include <linux/bitfield.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/uuid.h>
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#define FFA_SMC(calling_convention, func_num) \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, (calling_convention), \
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ARM_SMCCC_OWNER_STANDARD, (func_num))
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#define FFA_SMC_32(func_num) FFA_SMC(ARM_SMCCC_SMC_32, (func_num))
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#define FFA_SMC_64(func_num) FFA_SMC(ARM_SMCCC_SMC_64, (func_num))
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#define FFA_ERROR FFA_SMC_32(0x60)
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#define FFA_SUCCESS FFA_SMC_32(0x61)
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#define FFA_FN64_SUCCESS FFA_SMC_64(0x61)
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#define FFA_INTERRUPT FFA_SMC_32(0x62)
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#define FFA_VERSION FFA_SMC_32(0x63)
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#define FFA_FEATURES FFA_SMC_32(0x64)
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#define FFA_RX_RELEASE FFA_SMC_32(0x65)
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#define FFA_RXTX_MAP FFA_SMC_32(0x66)
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#define FFA_FN64_RXTX_MAP FFA_SMC_64(0x66)
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#define FFA_RXTX_UNMAP FFA_SMC_32(0x67)
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#define FFA_PARTITION_INFO_GET FFA_SMC_32(0x68)
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#define FFA_ID_GET FFA_SMC_32(0x69)
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#define FFA_MSG_POLL FFA_SMC_32(0x6A)
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#define FFA_MSG_WAIT FFA_SMC_32(0x6B)
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#define FFA_YIELD FFA_SMC_32(0x6C)
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#define FFA_RUN FFA_SMC_32(0x6D)
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#define FFA_MSG_SEND FFA_SMC_32(0x6E)
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#define FFA_MSG_SEND_DIRECT_REQ FFA_SMC_32(0x6F)
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#define FFA_FN64_MSG_SEND_DIRECT_REQ FFA_SMC_64(0x6F)
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#define FFA_MSG_SEND_DIRECT_RESP FFA_SMC_32(0x70)
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#define FFA_FN64_MSG_SEND_DIRECT_RESP FFA_SMC_64(0x70)
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#define FFA_MEM_DONATE FFA_SMC_32(0x71)
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#define FFA_FN64_MEM_DONATE FFA_SMC_64(0x71)
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#define FFA_MEM_LEND FFA_SMC_32(0x72)
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#define FFA_FN64_MEM_LEND FFA_SMC_64(0x72)
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#define FFA_MEM_SHARE FFA_SMC_32(0x73)
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#define FFA_FN64_MEM_SHARE FFA_SMC_64(0x73)
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#define FFA_MEM_RETRIEVE_REQ FFA_SMC_32(0x74)
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#define FFA_FN64_MEM_RETRIEVE_REQ FFA_SMC_64(0x74)
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#define FFA_MEM_RETRIEVE_RESP FFA_SMC_32(0x75)
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#define FFA_MEM_RELINQUISH FFA_SMC_32(0x76)
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#define FFA_MEM_RECLAIM FFA_SMC_32(0x77)
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#define FFA_MEM_OP_PAUSE FFA_SMC_32(0x78)
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#define FFA_MEM_OP_RESUME FFA_SMC_32(0x79)
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#define FFA_MEM_FRAG_RX FFA_SMC_32(0x7A)
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#define FFA_MEM_FRAG_TX FFA_SMC_32(0x7B)
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#define FFA_NORMAL_WORLD_RESUME FFA_SMC_32(0x7C)
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#define FFA_NOTIFICATION_BITMAP_CREATE FFA_SMC_32(0x7D)
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#define FFA_NOTIFICATION_BITMAP_DESTROY FFA_SMC_32(0x7E)
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#define FFA_NOTIFICATION_BIND FFA_SMC_32(0x7F)
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#define FFA_NOTIFICATION_UNBIND FFA_SMC_32(0x80)
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#define FFA_NOTIFICATION_SET FFA_SMC_32(0x81)
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#define FFA_NOTIFICATION_GET FFA_SMC_32(0x82)
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#define FFA_NOTIFICATION_INFO_GET FFA_SMC_32(0x83)
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#define FFA_FN64_NOTIFICATION_INFO_GET FFA_SMC_64(0x83)
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#define FFA_RX_ACQUIRE FFA_SMC_32(0x84)
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#define FFA_SPM_ID_GET FFA_SMC_32(0x85)
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#define FFA_MSG_SEND2 FFA_SMC_32(0x86)
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#define FFA_SECONDARY_EP_REGISTER FFA_SMC_32(0x87)
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#define FFA_FN64_SECONDARY_EP_REGISTER FFA_SMC_64(0x87)
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#define FFA_MEM_PERM_GET FFA_SMC_32(0x88)
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#define FFA_FN64_MEM_PERM_GET FFA_SMC_64(0x88)
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#define FFA_MEM_PERM_SET FFA_SMC_32(0x89)
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#define FFA_FN64_MEM_PERM_SET FFA_SMC_64(0x89)
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#define FFA_CONSOLE_LOG FFA_SMC_32(0x8A)
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#define FFA_PARTITION_INFO_GET_REGS FFA_SMC_64(0x8B)
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#define FFA_EL3_INTR_HANDLE FFA_SMC_32(0x8C)
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#define FFA_MSG_SEND_DIRECT_REQ2 FFA_SMC_64(0x8D)
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#define FFA_MSG_SEND_DIRECT_RESP2 FFA_SMC_64(0x8E)
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/*
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* For some calls it is necessary to use SMC64 to pass or return 64-bit values.
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* For such calls FFA_FN_NATIVE(name) will choose the appropriate
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* (native-width) function ID.
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*/
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#ifdef CONFIG_64BIT
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#define FFA_FN_NATIVE(name) FFA_FN64_##name
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#else
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#define FFA_FN_NATIVE(name) FFA_##name
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#endif
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/* FFA error codes. */
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#define FFA_RET_SUCCESS (0)
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#define FFA_RET_NOT_SUPPORTED (-1)
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#define FFA_RET_INVALID_PARAMETERS (-2)
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#define FFA_RET_NO_MEMORY (-3)
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#define FFA_RET_BUSY (-4)
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#define FFA_RET_INTERRUPTED (-5)
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#define FFA_RET_DENIED (-6)
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#define FFA_RET_RETRY (-7)
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#define FFA_RET_ABORTED (-8)
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#define FFA_RET_NO_DATA (-9)
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/* FFA version encoding */
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#define FFA_MAJOR_VERSION_MASK GENMASK(30, 16)
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#define FFA_MINOR_VERSION_MASK GENMASK(15, 0)
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#define FFA_MAJOR_VERSION(x) ((u16)(FIELD_GET(FFA_MAJOR_VERSION_MASK, (x))))
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#define FFA_MINOR_VERSION(x) ((u16)(FIELD_GET(FFA_MINOR_VERSION_MASK, (x))))
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#define FFA_PACK_VERSION_INFO(major, minor) \
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(FIELD_PREP(FFA_MAJOR_VERSION_MASK, (major)) | \
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FIELD_PREP(FFA_MINOR_VERSION_MASK, (minor)))
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#define FFA_VERSION_1_0 FFA_PACK_VERSION_INFO(1, 0)
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#define FFA_VERSION_1_1 FFA_PACK_VERSION_INFO(1, 1)
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/**
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* FF-A specification mentions explicitly about '4K pages'. This should
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* not be confused with the kernel PAGE_SIZE, which is the translation
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* granule kernel is configured and may be one among 4K, 16K and 64K.
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*/
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#define FFA_PAGE_SIZE SZ_4K
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/*
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* Minimum buffer size/alignment encodings returned by an FFA_FEATURES
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* query for FFA_RXTX_MAP.
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*/
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#define FFA_FEAT_RXTX_MIN_SZ_4K 0
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#define FFA_FEAT_RXTX_MIN_SZ_64K 1
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#define FFA_FEAT_RXTX_MIN_SZ_16K 2
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/* FFA Bus/Device/Driver related */
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struct ffa_device {
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u32 id;
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u32 properties;
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int vm_id;
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bool mode_32bit;
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uuid_t uuid;
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struct device dev;
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const struct ffa_ops *ops;
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};
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#define to_ffa_dev(d) container_of(d, struct ffa_device, dev)
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struct ffa_device_id {
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uuid_t uuid;
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};
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struct ffa_driver {
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const char *name;
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int (*probe)(struct ffa_device *sdev);
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void (*remove)(struct ffa_device *sdev);
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const struct ffa_device_id *id_table;
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struct device_driver driver;
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};
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#define to_ffa_driver(d) container_of_const(d, struct ffa_driver, driver)
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static inline void ffa_dev_set_drvdata(struct ffa_device *fdev, void *data)
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{
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dev_set_drvdata(&fdev->dev, data);
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}
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static inline void *ffa_dev_get_drvdata(struct ffa_device *fdev)
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{
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return dev_get_drvdata(&fdev->dev);
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}
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struct ffa_partition_info;
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#if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)
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struct ffa_device *
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ffa_device_register(const struct ffa_partition_info *part_info,
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const struct ffa_ops *ops);
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void ffa_device_unregister(struct ffa_device *ffa_dev);
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int ffa_driver_register(struct ffa_driver *driver, struct module *owner,
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const char *mod_name);
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void ffa_driver_unregister(struct ffa_driver *driver);
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bool ffa_device_is_valid(struct ffa_device *ffa_dev);
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#else
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static inline struct ffa_device *
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ffa_device_register(const struct ffa_partition_info *part_info,
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const struct ffa_ops *ops)
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{
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return NULL;
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}
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static inline void ffa_device_unregister(struct ffa_device *dev) {}
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static inline int
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ffa_driver_register(struct ffa_driver *driver, struct module *owner,
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const char *mod_name)
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{
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return -EINVAL;
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}
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static inline void ffa_driver_unregister(struct ffa_driver *driver) {}
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static inline
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bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; }
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#endif /* CONFIG_ARM_FFA_TRANSPORT */
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#define ffa_register(driver) \
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ffa_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
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#define ffa_unregister(driver) \
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ffa_driver_unregister(driver)
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/**
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* module_ffa_driver() - Helper macro for registering a psa_ffa driver
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* @__ffa_driver: ffa_driver structure
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*
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* Helper macro for psa_ffa drivers to set up proper module init / exit
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* functions. Replaces module_init() and module_exit() and keeps people from
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* printing pointless things to the kernel log when their driver is loaded.
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*/
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#define module_ffa_driver(__ffa_driver) \
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module_driver(__ffa_driver, ffa_register, ffa_unregister)
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extern const struct bus_type ffa_bus_type;
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/* The FF-A 1.0 partition structure lacks the uuid[4] */
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#define FFA_1_0_PARTITON_INFO_SZ (8)
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/* FFA transport related */
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struct ffa_partition_info {
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u16 id;
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u16 exec_ctxt;
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/* partition supports receipt of direct requests */
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#define FFA_PARTITION_DIRECT_RECV BIT(0)
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/* partition can send direct requests. */
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#define FFA_PARTITION_DIRECT_SEND BIT(1)
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/* partition can send and receive indirect messages. */
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#define FFA_PARTITION_INDIRECT_MSG BIT(2)
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/* partition can receive notifications */
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#define FFA_PARTITION_NOTIFICATION_RECV BIT(3)
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/* partition runs in the AArch64 execution state. */
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#define FFA_PARTITION_AARCH64_EXEC BIT(8)
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u32 properties;
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u32 uuid[4];
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};
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static inline
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bool ffa_partition_check_property(struct ffa_device *dev, u32 property)
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{
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return dev->properties & property;
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}
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#define ffa_partition_supports_notify_recv(dev) \
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ffa_partition_check_property(dev, FFA_PARTITION_NOTIFICATION_RECV)
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#define ffa_partition_supports_indirect_msg(dev) \
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ffa_partition_check_property(dev, FFA_PARTITION_INDIRECT_MSG)
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#define ffa_partition_supports_direct_recv(dev) \
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ffa_partition_check_property(dev, FFA_PARTITION_DIRECT_RECV)
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/* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */
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struct ffa_send_direct_data {
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unsigned long data0; /* w3/x3 */
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unsigned long data1; /* w4/x4 */
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unsigned long data2; /* w5/x5 */
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unsigned long data3; /* w6/x6 */
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unsigned long data4; /* w7/x7 */
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};
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struct ffa_indirect_msg_hdr {
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u32 flags;
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u32 res0;
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u32 offset;
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u32 send_recv_id;
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u32 size;
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};
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/* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP}2 which pass data via registers */
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struct ffa_send_direct_data2 {
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unsigned long data[14]; /* x4-x17 */
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};
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struct ffa_mem_region_addr_range {
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/* The base IPA of the constituent memory region, aligned to 4 kiB */
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u64 address;
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/* The number of 4 kiB pages in the constituent memory region. */
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u32 pg_cnt;
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u32 reserved;
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};
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struct ffa_composite_mem_region {
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/*
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* The total number of 4 kiB pages included in this memory region. This
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* must be equal to the sum of page counts specified in each
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* `struct ffa_mem_region_addr_range`.
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*/
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u32 total_pg_cnt;
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/* The number of constituents included in this memory region range */
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u32 addr_range_cnt;
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u64 reserved;
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/** An array of `addr_range_cnt` memory region constituents. */
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struct ffa_mem_region_addr_range constituents[];
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};
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struct ffa_mem_region_attributes {
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/* The ID of the VM to which the memory is being given or shared. */
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u16 receiver;
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/*
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* The permissions with which the memory region should be mapped in the
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* receiver's page table.
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*/
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#define FFA_MEM_EXEC BIT(3)
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#define FFA_MEM_NO_EXEC BIT(2)
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#define FFA_MEM_RW BIT(1)
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#define FFA_MEM_RO BIT(0)
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u8 attrs;
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/*
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* Flags used during FFA_MEM_RETRIEVE_REQ and FFA_MEM_RETRIEVE_RESP
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* for memory regions with multiple borrowers.
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*/
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#define FFA_MEM_RETRIEVE_SELF_BORROWER BIT(0)
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u8 flag;
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/*
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* Offset in bytes from the start of the outer `ffa_memory_region` to
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* an `struct ffa_mem_region_addr_range`.
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*/
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u32 composite_off;
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u64 reserved;
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};
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struct ffa_mem_region {
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/* The ID of the VM/owner which originally sent the memory region */
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u16 sender_id;
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#define FFA_MEM_NORMAL BIT(5)
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#define FFA_MEM_DEVICE BIT(4)
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#define FFA_MEM_WRITE_BACK (3 << 2)
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#define FFA_MEM_NON_CACHEABLE (1 << 2)
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#define FFA_DEV_nGnRnE (0 << 2)
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#define FFA_DEV_nGnRE (1 << 2)
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#define FFA_DEV_nGRE (2 << 2)
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#define FFA_DEV_GRE (3 << 2)
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#define FFA_MEM_NON_SHAREABLE (0)
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#define FFA_MEM_OUTER_SHAREABLE (2)
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#define FFA_MEM_INNER_SHAREABLE (3)
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/* Memory region attributes, upper byte MBZ pre v1.1 */
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u16 attributes;
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/*
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* Clear memory region contents after unmapping it from the sender and
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* before mapping it for any receiver.
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*/
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#define FFA_MEM_CLEAR BIT(0)
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/*
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* Whether the hypervisor may time slice the memory sharing or retrieval
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* operation.
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*/
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#define FFA_TIME_SLICE_ENABLE BIT(1)
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#define FFA_MEM_RETRIEVE_TYPE_IN_RESP (0 << 3)
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#define FFA_MEM_RETRIEVE_TYPE_SHARE (1 << 3)
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#define FFA_MEM_RETRIEVE_TYPE_LEND (2 << 3)
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#define FFA_MEM_RETRIEVE_TYPE_DONATE (3 << 3)
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#define FFA_MEM_RETRIEVE_ADDR_ALIGN_HINT BIT(9)
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#define FFA_MEM_RETRIEVE_ADDR_ALIGN(x) ((x) << 5)
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/* Flags to control behaviour of the transaction. */
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u32 flags;
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#define HANDLE_LOW_MASK GENMASK_ULL(31, 0)
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#define HANDLE_HIGH_MASK GENMASK_ULL(63, 32)
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#define HANDLE_LOW(x) ((u32)(FIELD_GET(HANDLE_LOW_MASK, (x))))
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#define HANDLE_HIGH(x) ((u32)(FIELD_GET(HANDLE_HIGH_MASK, (x))))
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#define PACK_HANDLE(l, h) \
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(FIELD_PREP(HANDLE_LOW_MASK, (l)) | FIELD_PREP(HANDLE_HIGH_MASK, (h)))
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/*
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* A globally-unique ID assigned by the hypervisor for a region
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* of memory being sent between VMs.
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*/
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u64 handle;
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/*
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* An implementation defined value associated with the receiver and the
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* memory region.
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*/
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u64 tag;
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/* Size of each endpoint memory access descriptor, MBZ pre v1.1 */
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u32 ep_mem_size;
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/*
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* The number of `ffa_mem_region_attributes` entries included in this
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* transaction.
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*/
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u32 ep_count;
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/*
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* 16-byte aligned offset from the base address of this descriptor
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* to the first element of the endpoint memory access descriptor array
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* Valid only from v1.1
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*/
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u32 ep_mem_offset;
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/* MBZ, valid only from v1.1 */
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u32 reserved[3];
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};
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#define CONSTITUENTS_OFFSET(x) \
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(offsetof(struct ffa_composite_mem_region, constituents[x]))
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static inline u32
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ffa_mem_desc_offset(struct ffa_mem_region *buf, int count, u32 ffa_version)
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{
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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);
|
|
int (*indirect_send)(struct ffa_device *dev, void *buf, size_t sz);
|
|
int (*sync_send_receive2)(struct ffa_device *dev, const uuid_t *uuid,
|
|
struct ffa_send_direct_data2 *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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