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Message-ID: <169235811556.193557.1023625262204809514.stgit@jupiter>
Date: Fri, 18 Aug 2023 16:59:07 +0530
From: Mahesh Salgaonkar <mahesh@...ux.ibm.com>
To: linuxppc-dev <linuxppc-dev@...abs.org>
Cc: Tyrel Datwyler <tyreld@...ux.ibm.com>,
Nathan Lynch <nathanl@...ux.ibm.com>,
"Oliver O'Halloran" <oohall@...il.com>,
linux-pci <linux-pci@...r.kernel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Michael Ellerman <mpe@...erman.id.au>,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v9 1/2] powerpc/rtas: export rtas_error_rc() for reuse.
Also, #define descriptive names for common rtas return codes and use it
instead of numeric values.
Signed-off-by: Mahesh Salgaonkar <mahesh@...ux.ibm.com>
---
Change in v9:
- Keep the existing function name rtas_error_rc().
- Use EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL
https://lore.kernel.org/all/877cpxdksx.fsf@mail.lhotse/
Change in V7:
- Until v6 there was only one patch with subject "PCI hotplug: rpaphp:
Error out on busy status from get-sensor-state". Starting from v7, adding
this new patch to introduce rtas_generic_errno() to handle generic rtas
error codes.
https://lore.kernel.org/all/20220429162545.GA79541@bhelgaas/
---
arch/powerpc/include/asm/rtas.h | 3 +++
arch/powerpc/kernel/rtas.c | 41 ++++++++++++++++++++-------------------
2 files changed, 24 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 3abe15ac79db1..c697c3c746946 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -202,7 +202,9 @@ typedef struct {
#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
@@ -425,6 +427,7 @@ extern int rtas_set_indicator(int indicator, int index, int new_value);
extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
extern void rtas_progress(char *s, unsigned short hex);
int rtas_ibm_suspend_me(int *fw_status);
+int rtas_error_rc(int rtas_rc);
struct rtc_time;
extern time64_t rtas_get_boot_time(void);
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index c087eeee320ff..8cef3ccb41d16 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -1330,33 +1330,34 @@ bool __ref rtas_busy_delay(int status)
}
EXPORT_SYMBOL_GPL(rtas_busy_delay);
-static int rtas_error_rc(int rtas_rc)
+int rtas_error_rc(int rtas_rc)
{
int rc;
switch (rtas_rc) {
- case -1: /* Hardware Error */
- rc = -EIO;
- break;
- case -3: /* Bad indicator/domain/etc */
- rc = -EINVAL;
- break;
- case -9000: /* Isolation error */
- rc = -EFAULT;
- break;
- case -9001: /* Outstanding TCE/PTE */
- rc = -EEXIST;
- break;
- case -9002: /* No usable slot */
- rc = -ENODEV;
- break;
- default:
- pr_err("%s: unexpected error %d\n", __func__, rtas_rc);
- rc = -ERANGE;
- break;
+ case RTAS_HARDWARE_ERROR: /* Hardware Error */
+ rc = -EIO;
+ break;
+ case RTAS_INVALID_PARAMETER: /* Bad indicator/domain/etc */
+ rc = -EINVAL;
+ break;
+ case -9000: /* Isolation error */
+ rc = -EFAULT;
+ break;
+ case -9001: /* Outstanding TCE/PTE */
+ rc = -EEXIST;
+ break;
+ case -9002: /* No usable slot */
+ rc = -ENODEV;
+ break;
+ default:
+ pr_err("%s: unexpected error %d\n", __func__, rtas_rc);
+ rc = -ERANGE;
+ break;
}
return rc;
}
+EXPORT_SYMBOL_GPL(rtas_error_rc);
int rtas_get_power_level(int powerdomain, int *level)
{
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