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Wysocki" , Mika Westerberg , Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Cc: Palmer Dabbelt , Paul Walmsley , Alexandre Ghiti , Len Brown , Sunil V L , Rahul Pathak , Leyfoon Tan , Atish Patra , Andrew Jones , Samuel Holland , Anup Patel , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel , Atish Patra Subject: [PATCH v9 03/24] RISC-V: Add defines for the SBI message proxy extension Date: Mon, 28 Jul 2025 15:10:11 +0530 Message-ID: <20250728094032.63545-4-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250728094032.63545-1-apatel@ventanamicro.com> References: <20250728094032.63545-1-apatel@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add defines for the new SBI message proxy extension which is part of the SBI v3.0 specification. Reviewed-by: Atish Patra Reviewed-by: Andy Shevchenko Co-developed-by: Rahul Pathak Signed-off-by: Rahul Pathak Signed-off-by: Anup Patel --- arch/riscv/include/asm/sbi.h | 63 ++++++++++++++++++++++++++++++++++++ include/linux/wordpart.h | 8 +++++ 2 files changed, 71 insertions(+) diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 341e74238aa0..22f6e70cd32e 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -10,6 +10,7 @@ #include #include #include +#include =20 #ifdef CONFIG_RISCV_SBI enum sbi_ext_id { @@ -36,6 +37,7 @@ enum sbi_ext_id { SBI_EXT_STA =3D 0x535441, SBI_EXT_NACL =3D 0x4E41434C, SBI_EXT_FWFT =3D 0x46574654, + SBI_EXT_MPXY =3D 0x4D505859, =20 /* Experimentals extensions must lie within this range */ SBI_EXT_EXPERIMENTAL_START =3D 0x08000000, @@ -430,6 +432,67 @@ enum sbi_fwft_feature_t { =20 #define SBI_FWFT_SET_FLAG_LOCK BIT(0) =20 +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 =3D 0x00000000, + SBI_MPXY_ATTR_MSG_PROT_VER =3D 0x00000001, + SBI_MPXY_ATTR_MSG_MAX_LEN =3D 0x00000002, + SBI_MPXY_ATTR_MSG_SEND_TIMEOUT =3D 0x00000003, + SBI_MPXY_ATTR_MSG_COMPLETION_TIMEOUT =3D 0x00000004, + SBI_MPXY_ATTR_CHANNEL_CAPABILITY =3D 0x00000005, + SBI_MPXY_ATTR_SSE_EVENT_ID =3D 0x00000006, + SBI_MPXY_ATTR_MSI_CONTROL =3D 0x00000007, + SBI_MPXY_ATTR_MSI_ADDR_LO =3D 0x00000008, + SBI_MPXY_ATTR_MSI_ADDR_HI =3D 0x00000009, + SBI_MPXY_ATTR_MSI_DATA =3D 0x0000000A, + SBI_MPXY_ATTR_EVENTS_STATE_CONTROL =3D 0x0000000B, + SBI_MPXY_ATTR_STD_ATTR_MAX_IDX, + /* + * Message protocol specific attributes, managed by + * the message protocol specification. + */ + SBI_MPXY_ATTR_MSGPROTO_ATTR_START =3D 0x80000000, + SBI_MPXY_ATTR_MSGPROTO_ATTR_END =3D 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 =3D 0x0, +}; + +/* RPMI message protocol specific MPXY attributes */ +enum sbi_mpxy_rpmi_attribute_id { + SBI_MPXY_RPMI_ATTR_SERVICEGROUP_ID =3D 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) make_u32_from_two_u16(__maj,= __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 diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h index 5a7b97bb7c95..ed8717730037 100644 --- a/include/linux/wordpart.h +++ b/include/linux/wordpart.h @@ -31,6 +31,14 @@ */ #define lower_16_bits(n) ((u16)((n) & 0xffff)) =20 +/** + * make_u32_from_two_u16 - return u32 number by combining + * two u16 numbers. + * @hi: upper 16 bit number + * @lo: lower 16 bit number + */ +#define make_u32_from_two_u16(hi, lo) (((u32)(hi) << 16) | (u32)(lo)) + /** * REPEAT_BYTE - repeat the value @x multiple times as an unsigned long va= lue * @x: value to repeat --=20 2.43.0