Commit 508da386 authored by Anup Patel's avatar Anup Patel Committed by Paul Walmsley
Browse files

RISC-V: Add defines for the SBI message proxy extension 



Add defines for the new SBI message proxy extension which is part
of the SBI v3.0 specification.

Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: default avatarRahul Pathak <rpathak@ventanamicro.com>
Signed-off-by: default avatarRahul Pathak <rpathak@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250818040920.272664-4-apatel@ventanamicro.com


Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent 581b4da1

arch/riscv/include/asm/sbi.h

+62 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ enum sbi_ext_id { 
	SBI_EXT_STA = 0x535441,

	SBI_EXT_NACL = 0x4E41434C,

	SBI_EXT_FWFT = 0x46574654,

	SBI_EXT_MPXY = 0x4D505859,



	/* Experimentals extensions must lie within this range */

	SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@@ -430,6 +431,67 @@ enum sbi_fwft_feature_t { 


#define SBI_FWFT_SET_FLAG_LOCK			BIT(0)



enum sbi_ext_mpxy_fid {

	SBI_EXT_MPXY_GET_SHMEM_SIZE,

	SBI_EXT_MPXY_SET_SHMEM,

	SBI_EXT_MPXY_GET_CHANNEL_IDS,

	SBI_EXT_MPXY_READ_ATTRS,

	SBI_EXT_MPXY_WRITE_ATTRS,

	SBI_EXT_MPXY_SEND_MSG_WITH_RESP,

	SBI_EXT_MPXY_SEND_MSG_WITHOUT_RESP,

	SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS,

};



enum sbi_mpxy_attribute_id {

	/* Standard channel attributes managed by MPXY framework */

	SBI_MPXY_ATTR_MSG_PROT_ID		= 0x00000000,

	SBI_MPXY_ATTR_MSG_PROT_VER		= 0x00000001,

	SBI_MPXY_ATTR_MSG_MAX_LEN		= 0x00000002,

	SBI_MPXY_ATTR_MSG_SEND_TIMEOUT		= 0x00000003,

	SBI_MPXY_ATTR_MSG_COMPLETION_TIMEOUT	= 0x00000004,

	SBI_MPXY_ATTR_CHANNEL_CAPABILITY	= 0x00000005,

	SBI_MPXY_ATTR_SSE_EVENT_ID		= 0x00000006,

	SBI_MPXY_ATTR_MSI_CONTROL		= 0x00000007,

	SBI_MPXY_ATTR_MSI_ADDR_LO		= 0x00000008,

	SBI_MPXY_ATTR_MSI_ADDR_HI		= 0x00000009,

	SBI_MPXY_ATTR_MSI_DATA			= 0x0000000A,

	SBI_MPXY_ATTR_EVENTS_STATE_CONTROL	= 0x0000000B,

	SBI_MPXY_ATTR_STD_ATTR_MAX_IDX,

	/*

	 * Message protocol specific attributes, managed by

	 * the message protocol specification.

	 */

	SBI_MPXY_ATTR_MSGPROTO_ATTR_START	= 0x80000000,

	SBI_MPXY_ATTR_MSGPROTO_ATTR_END		= 0xffffffff

};



/* Possible values of MSG_PROT_ID attribute as-per SBI v3.0 (or higher) */

enum sbi_mpxy_msgproto_id {

	SBI_MPXY_MSGPROTO_RPMI_ID = 0x0,

};



/* RPMI message protocol specific MPXY attributes */

enum sbi_mpxy_rpmi_attribute_id {

	SBI_MPXY_RPMI_ATTR_SERVICEGROUP_ID = SBI_MPXY_ATTR_MSGPROTO_ATTR_START,

	SBI_MPXY_RPMI_ATTR_SERVICEGROUP_VERSION,

	SBI_MPXY_RPMI_ATTR_IMPL_ID,

	SBI_MPXY_RPMI_ATTR_IMPL_VERSION,

	SBI_MPXY_RPMI_ATTR_MAX_ID

};



/* Encoding of MSG_PROT_VER attribute */

#define SBI_MPXY_MSG_PROT_VER_MAJOR(__ver)	upper_16_bits(__ver)

#define SBI_MPXY_MSG_PROT_VER_MINOR(__ver)	lower_16_bits(__ver)

#define SBI_MPXY_MSG_PROT_MKVER(__maj, __min)	(((u32)(__maj) << 16) | (u16)(__min))



/* Capabilities available through CHANNEL_CAPABILITY attribute */

#define SBI_MPXY_CHAN_CAP_MSI			BIT(0)

#define SBI_MPXY_CHAN_CAP_SSE			BIT(1)

#define SBI_MPXY_CHAN_CAP_EVENTS_STATE		BIT(2)

#define SBI_MPXY_CHAN_CAP_SEND_WITH_RESP	BIT(3)

#define SBI_MPXY_CHAN_CAP_SEND_WITHOUT_RESP	BIT(4)

#define SBI_MPXY_CHAN_CAP_GET_NOTIFICATIONS	BIT(5)



/* SBI spec version fields */

#define SBI_SPEC_VERSION_DEFAULT	0x1

#define SBI_SPEC_VERSION_MAJOR_SHIFT	24