diff options
| author | Sudeep Holla <sudeep.holla@arm.com> | 2021-05-21 16:10:32 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-05-26 22:38:43 +0100 |
| commit | d0c0bce831223b08e5bade2cefc93c3ddb790796 (patch) | |
| tree | 73fbc6bf8009f496dd0fcf12afde04d4a9613a18 /include/linux | |
| parent | 714be77e976a4b013b935b3223b2ef68856084d0 (diff) | |
firmware: arm_ffa: Setup in-kernel users of FFA partitions
Parse the FFA nodes from the device-tree and register all the partitions
whose services will be used in the kernel.
In order to also enable in-kernel users of FFA interface, let us add
simple set of operations for such devices.
The in-kernel users are registered without the character device interface.
Link: https://lore.kernel.org/r/20210521151033.181846-5-sudeep.holla@arm.com
Tested-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/arm_ffa.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 331ff62c9873..d672673fc621 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -6,7 +6,6 @@ #ifndef _LINUX_ARM_FFA_H #define _LINUX_ARM_FFA_H -#include <linux/cdev.h> #include <linux/device.h> #include <linux/module.h> #include <linux/types.h> @@ -15,6 +14,7 @@ /* FFA Bus/Device/Driver related */ struct ffa_device { int vm_id; + bool mode_32bit; uuid_t uuid; struct device dev; }; @@ -48,6 +48,7 @@ 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 @@ -70,6 +71,11 @@ 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) \ @@ -88,4 +94,35 @@ bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; } #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_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); +}; + #endif /* _LINUX_ARM_FFA_H */ |