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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: "Aneesh Kumar K.V (IBM)" <aneesh.kumar@kernel.org> Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20231212-papr-sys_rtas-vs-lockdown-v6-4-e9eafd0c8c6c@linux.ibm.com
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1 changed files with 19 additions and 6 deletions
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@ -201,12 +201,25 @@ typedef struct {
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/* Memory set aside for sys_rtas to use with calls that need a work area. */
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#define RTAS_USER_REGION_SIZE (64 * 1024)
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/* RTAS return status codes */
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#define RTAS_HARDWARE_ERROR -1 /* Hardware Error */
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#define RTAS_BUSY -2 /* RTAS Busy */
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#define RTAS_INVALID_PARAMETER -3 /* Invalid indicator/domain/sensor etc. */
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#define RTAS_EXTENDED_DELAY_MIN 9900
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#define RTAS_EXTENDED_DELAY_MAX 9905
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/*
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* Common RTAS function return values, derived from the table "RTAS
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* Status Word Values" in PAPR+ v2.13 7.2.8: "Return Codes". If a
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* function can return a value in this table then generally it has the
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* meaning listed here. More extended commentary in the documentation
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* for rtas_call().
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*
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* RTAS functions may use negative and positive numbers not in this
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* set for function-specific error and success conditions,
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* respectively.
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*/
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#define RTAS_SUCCESS 0 /* Success. */
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#define RTAS_HARDWARE_ERROR -1 /* Hardware or other unspecified error. */
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#define RTAS_BUSY -2 /* Retry immediately. */
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#define RTAS_INVALID_PARAMETER -3 /* Invalid indicator/domain/sensor etc. */
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#define RTAS_UNEXPECTED_STATE_CHANGE -7 /* Seems limited to EEH and slot reset. */
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#define RTAS_EXTENDED_DELAY_MIN 9900 /* Retry after delaying for ~1ms. */
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#define RTAS_EXTENDED_DELAY_MAX 9905 /* Retry after delaying for ~100s. */
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#define RTAS_ML_ISOLATION_ERROR -9000 /* Multi-level isolation error. */
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/* statuses specific to ibm,suspend-me */
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#define RTAS_SUSPEND_ABORTED 9000 /* Suspension aborted */
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