powerpc: Make function that parses RTAS error logs global

The IO event interrupt code has a function that finds specific
sections in an RTAS error log. We want to use it in the EPOW
code so make it global.

Rename things to make it less cryptic:

find_xelog_section() -> get_pseries_errorlog()
struct pseries_elog_section -> struct pseries_errorlog

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 01c143bb77ae..a01fa3eee6bd 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -204,6 +204,39 @@ struct rtas_ext_event_log_v6 {
                                         /* Variable length.             */
 };
 
+/* pSeries event log format */
+
+/* Two bytes ASCII section IDs */
+#define PSERIES_ELOG_SECT_ID_PRIV_HDR           (('P' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_HDR           (('U' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC        (('P' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_EXTENDED_UH        (('E' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FAILING_MTMS       (('M' << 8) | 'T')
+#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC      (('S' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR       (('D' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FW_ERROR           (('S' << 8) | 'W')
+#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID     (('L' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID  (('L' << 8) | 'R')
+#define PSERIES_ELOG_SECT_ID_HMC_ID             (('H' << 8) | 'M')
+#define PSERIES_ELOG_SECT_ID_EPOW               (('E' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_IO_EVENT           (('I' << 8) | 'E')
+#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO      (('M' << 8) | 'I')
+#define PSERIES_ELOG_SECT_ID_CALL_HOME          (('C' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_DEF           (('U' << 8) | 'D')
+
+/* Vendor specific Platform Event Log Format, Version 6, section header */
+struct pseries_errorlog {
+        uint16_t id;                    /* 0x00 2-byte ASCII section ID */
+        uint16_t length;                /* 0x02 Section length in bytes */
+        uint8_t version;                /* 0x04 Section version         */
+        uint8_t subtype;                /* 0x05 Section subtype         */
+        uint16_t creator_component;     /* 0x06 Creator component ID    */
+        uint8_t data[];                 /* 0x08 Start of section data   */
+};
+
+struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+                                              uint16_t section_id);
+
 /*
  * This can be set by the rtas_flash module so that it can get called
  * as the absolutely last thing before the kernel terminates.