[PATCH v4 09/25] opal: add MPIPL interface definitions

[Hari Bathini]

Signed-off-by: Hari Bathini <hbathini at linux.ibm.com>
---
 arch/powerpc/include/asm/opal-api.h        |   50 +++++++++++++++++++++++++++-
 arch/powerpc/include/asm/opal.h            |    6 +++
 arch/powerpc/platforms/powernv/opal-call.c |    3 ++
 3 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 383242e..c8a5665 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -208,7 +208,10 @@
 #define OPAL_HANDLE_HMI2			166
 #define	OPAL_NX_COPROC_INIT			167
 #define OPAL_XIVE_GET_VP_STATE			170
-#define OPAL_LAST				170
+#define OPAL_MPIPL_UPDATE			173
+#define OPAL_MPIPL_REGISTER_TAG			174
+#define OPAL_MPIPL_QUERY_TAG			175
+#define OPAL_LAST				175
 
 #define QUIESCE_HOLD			1 /* Spin all calls at entry */
 #define QUIESCE_REJECT			2 /* Fail all calls with OPAL_BUSY */
@@ -980,6 +983,50 @@ struct opal_sg_list {
 };
 
 /*
+ * Firmware-Assisted Dump (FADump) using MPIPL
+ */
+
+/* MPIPL update operations */
+enum opal_mpipl_ops {
+	OPAL_MPIPL_ADD_RANGE			= 0,
+	OPAL_MPIPL_REMOVE_RANGE			= 1,
+	OPAL_MPIPL_REMOVE_ALL			= 2,
+	OPAL_MPIPL_FREE_PRESERVED_MEMORY	= 3,
+};
+
+/*
+ * Each tag maps to a metadata type. Use these tags to register/query
+ * corresponding metadata address with/from OPAL.
+ */
+enum opal_mpipl_tags {
+	OPAL_MPIPL_TAG_CPU		= 0,
+	OPAL_MPIPL_TAG_OPAL		= 1,
+	OPAL_MPIPL_TAG_KERNEL		= 2,
+	OPAL_MPIPL_TAG_BOOT_MEM		= 3,
+};
+
+/* Preserved memory details */
+struct opal_mpipl_region {
+	__be64	src;
+	__be64	dest;
+	__be64	size;
+};
+
+/* FADump structure format version */
+#define MPIPL_FADUMP_VERSION			0x01
+
+/* Metadata provided by OPAL. */
+struct opal_mpipl_fadump {
+	u8				version;
+	u8				reserved[7];
+	__be32				crashing_pir;
+	__be32				cpu_data_version;
+	__be32				cpu_data_size;
+	__be32				region_cnt;
+	struct opal_mpipl_region	region[];
+} __attribute__((packed));
+
+/*
  * Dump region ID range usable by the OS
  */
 #define OPAL_DUMP_REGION_HOST_START		0x80
@@ -1059,6 +1106,7 @@ enum {
 	OPAL_REBOOT_NORMAL		= 0,
 	OPAL_REBOOT_PLATFORM_ERROR	= 1,
 	OPAL_REBOOT_FULL_IPL		= 2,
+	OPAL_REBOOT_MPIPL		= 3,
 };
 
 /* Argument to OPAL_PCI_TCE_KILL */
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 57bd029..878110a 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -39,6 +39,12 @@ int64_t opal_npu_spa_clear_cache(uint64_t phb_id, uint32_t bdfn,
 				uint64_t PE_handle);
 int64_t opal_npu_tl_set(uint64_t phb_id, uint32_t bdfn, long cap,
 			uint64_t rate_phys, uint32_t size);
+
+int64_t opal_mpipl_update(enum opal_mpipl_ops op, u64 src,
+			  u64 dest, u64 size);
+int64_t opal_mpipl_register_tag(enum opal_mpipl_tags tag, uint64_t addr);
+int64_t opal_mpipl_query_tag(enum opal_mpipl_tags tag, uint64_t *addr);
+
 int64_t opal_console_write(int64_t term_number, __be64 *length,
 			   const uint8_t *buffer);
 int64_t opal_console_read(int64_t term_number, __be64 *length,
diff --git a/arch/powerpc/platforms/powernv/opal-call.c b/arch/powerpc/platforms/powernv/opal-call.c
index 29ca523..fc8cc7c 100644
--- a/arch/powerpc/platforms/powernv/opal-call.c
+++ b/arch/powerpc/platforms/powernv/opal-call.c
@@ -287,3 +287,6 @@ OPAL_CALL(opal_pci_set_pbcq_tunnel_bar,		OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
 OPAL_CALL(opal_sensor_read_u64,			OPAL_SENSOR_READ_U64);
 OPAL_CALL(opal_sensor_group_enable,		OPAL_SENSOR_GROUP_ENABLE);
 OPAL_CALL(opal_nx_coproc_init,			OPAL_NX_COPROC_INIT);
+OPAL_CALL(opal_mpipl_update,			OPAL_MPIPL_UPDATE);
+OPAL_CALL(opal_mpipl_register_tag,		OPAL_MPIPL_REGISTER_TAG);
+OPAL_CALL(opal_mpipl_query_tag,			OPAL_MPIPL_QUERY_TAG);