Commit 9592aa5a authored by Nathan Lynch's avatar Nathan Lynch Committed by Michael Ellerman
Browse files

powerpc/rtas: Add function return status constants 



Not all of the generic RTAS function statuses specified in PAPR have
symbolic constants and descriptions in rtas.h. Fix this, providing a
little more background, slightly updating the existing wording, and
improving the formatting.

Reviewed-by: default avatar"Aneesh Kumar K.V (IBM)" <aneesh.kumar@kernel.org>
Signed-off-by: default avatarNathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231212-papr-sys_rtas-vs-lockdown-v6-4-e9eafd0c8c6c@linux.ibm.com
parent 669acc7e

arch/powerpc/include/asm/rtas.h

+19 −6
Original line number Diff line number Diff line
@@ -201,12 +201,25 @@ typedef struct { 
/* Memory set aside for sys_rtas to use with calls that need a work area. */

#define RTAS_USER_REGION_SIZE (64 * 1024)



/* RTAS return status codes */

#define RTAS_HARDWARE_ERROR	-1    /* Hardware Error */

#define RTAS_BUSY		-2    /* RTAS Busy */

/*

 * Common RTAS function return values, derived from the table "RTAS

 * Status Word Values" in PAPR+ v2.13 7.2.8: "Return Codes". If a

 * function can return a value in this table then generally it has the

 * meaning listed here. More extended commentary in the documentation

 * for rtas_call().

 *

 * RTAS functions may use negative and positive numbers not in this

 * set for function-specific error and success conditions,

 * respectively.

 */

#define RTAS_SUCCESS                     0 /* Success. */

#define RTAS_HARDWARE_ERROR             -1 /* Hardware or other unspecified error. */

#define RTAS_BUSY                       -2 /* Retry immediately. */

#define RTAS_INVALID_PARAMETER          -3 /* Invalid indicator/domain/sensor etc. */

#define RTAS_EXTENDED_DELAY_MIN	9900

#define RTAS_EXTENDED_DELAY_MAX	9905

#define RTAS_UNEXPECTED_STATE_CHANGE    -7 /* Seems limited to EEH and slot reset. */

#define RTAS_EXTENDED_DELAY_MIN       9900 /* Retry after delaying for ~1ms. */

#define RTAS_EXTENDED_DELAY_MAX       9905 /* Retry after delaying for ~100s. */

#define RTAS_ML_ISOLATION_ERROR      -9000 /* Multi-level isolation error. */



/* statuses specific to ibm,suspend-me */

#define RTAS_SUSPEND_ABORTED     9000 /* Suspension aborted */