From: Nathan Lynch via B4 Relay <devnull+nathanl.linux.ibm.com@kernel.org>
To: Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>
Cc: "Nathan Lynch" <nathanl@linux.ibm.com>,
tyreld@linux.ibm.com, gcwilson@linux.ibm.com,
"Aneesh Kumar K.V (IBM)" <aneesh.kumar@kernel.org>,
"Michal Suchánek" <msuchanek@suse.de>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v6 04/13] powerpc/rtas: Add function return status constants
Date: Tue, 12 Dec 2023 11:01:51 -0600 [thread overview]
Message-ID: <20231212-papr-sys_rtas-vs-lockdown-v6-4-e9eafd0c8c6c@linux.ibm.com> (raw)
In-Reply-To: <20231212-papr-sys_rtas-vs-lockdown-v6-0-e9eafd0c8c6c@linux.ibm.com>
From: Nathan Lynch <nathanl@linux.ibm.com>
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>
---
arch/powerpc/include/asm/rtas.h | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index a7110ed52e25..08d19e6904f7 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -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 */
-#define RTAS_INVALID_PARAMETER -3 /* Invalid indicator/domain/sensor etc. */
-#define RTAS_EXTENDED_DELAY_MIN 9900
-#define RTAS_EXTENDED_DELAY_MAX 9905
+/*
+ * 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_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 */
--
2.41.0
next prev parent reply other threads:[~2023-12-12 17:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-12 17:01 [PATCH v6 00/13] powerpc/pseries: New character devices for system parameters and VPD Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 01/13] powerpc/rtas: Avoid warning on invalid token argument to sys_rtas() Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 02/13] powerpc/rtas: Add for_each_rtas_function() iterator Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 03/13] powerpc/rtas: Fall back to linear search on failed token->function lookup Nathan Lynch via B4 Relay
2023-12-12 17:01 ` Nathan Lynch via B4 Relay [this message]
2023-12-12 17:01 ` [PATCH v6 05/13] powerpc/rtas: Move token validation from block_rtas_call() to sys_rtas() Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 06/13] powerpc/rtas: Facilitate high-level call sequences Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 07/13] powerpc/rtas: Serialize firmware activation sequences Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 08/13] powerpc/rtas: Warn if per-function lock isn't held Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 09/13] powerpc/pseries: Add papr-vpd character driver for VPD retrieval Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 10/13] powerpc/pseries/papr-sysparm: Validate buffer object lengths Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 11/13] powerpc/pseries/papr-sysparm: Expose character device to user space Nathan Lynch via B4 Relay
2023-12-12 17:01 ` [PATCH v6 12/13] powerpc/selftests: Add test for papr-vpd Nathan Lynch via B4 Relay
2023-12-12 17:02 ` [PATCH v6 13/13] powerpc/selftests: Add test for papr-sysparm Nathan Lynch via B4 Relay
2023-12-21 10:38 ` [PATCH v6 00/13] powerpc/pseries: New character devices for system parameters and VPD Michael Ellerman
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