Add defines for the new SBI message proxy extension which is part
of the SBI v3.0 specification.
Reviewed-by: Atish Patra <atishp@xxxxxxxxxxxx>
Co-developed-by: Rahul Pathak <rpathak@xxxxxxxxxxxxxxxx>
Signed-off-by: Rahul Pathak <rpathak@xxxxxxxxxxxxxxxx>
Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx>
---
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..59a7285ff956 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -10,6 +10,7 @@
#include <linux/types.h>
#include <linux/cpumask.h>
#include <linux/jump_label.h>
+#include <linux/wordpart.h>
#ifdef CONFIG_RISCV_SBI
enum sbi_ext_id {
@@ -36,6 +37,7 @@ 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 +432,67 @@ 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 */
+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) 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))
+/**
+ * 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 value
* @x: value to repeat
--
2.43.0
