rtas_generic_errno() function will convert the generic rtas return codes into errno. Also, #define descriptive names for rtas return codes and use it instead of numeric values.
Signed-off-by: Mahesh Salgaonkar <mah...@linux.ibm.com> --- - 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 | 10 +++++++ arch/powerpc/kernel/rtas.c | 53 ++++++++++++++++++++------------------- 2 files changed, 36 insertions(+), 27 deletions(-) diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h index 3abe15ac79db1..5572a0a2f6e18 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_BUSY -2 /* RTAS Busy */ +#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 @@ -212,6 +214,11 @@ typedef struct { #define RTAS_THREADS_ACTIVE -9005 /* Multiple processor threads active */ #define RTAS_OUTSTANDING_COPROC -9006 /* Outstanding coprocessor operations */ +/* statuses specific to get-sensor-state */ +#define RTAS_SLOT_UNISOLATED (-9000) +#define RTAS_SLOT_NOT_UNISOLATED (-9001) +#define RTAS_SLOT_NOT_USABLE (-9002) + /* RTAS event classes */ #define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */ #define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */ @@ -425,6 +432,7 @@ 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_generic_errno(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..80b6099e8ce20 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_generic_errno(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 RTAS_SLOT_UNISOLATED: /* Isolation error */ + rc = -EFAULT; + break; + case RTAS_SLOT_NOT_UNISOLATED: /* Outstanding TCE/PTE */ + rc = -EEXIST; + break; + case RTAS_SLOT_NOT_USABLE: /* No usable slot */ + rc = -ENODEV; + break; + default: + pr_err("%s: unexpected error %d\n", __func__, rtas_rc); + rc = -ERANGE; + break; } return rc; } +EXPORT_SYMBOL(rtas_generic_errno); int rtas_get_power_level(int powerdomain, int *level) { @@ -1370,7 +1371,7 @@ int rtas_get_power_level(int powerdomain, int *level) udelay(1); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; } EXPORT_SYMBOL_GPL(rtas_get_power_level); @@ -1388,7 +1389,7 @@ int rtas_set_power_level(int powerdomain, int level, int *setlevel) } while (rtas_busy_delay(rc)); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; } EXPORT_SYMBOL_GPL(rtas_set_power_level); @@ -1406,7 +1407,7 @@ int rtas_get_sensor(int sensor, int index, int *state) } while (rtas_busy_delay(rc)); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; } EXPORT_SYMBOL_GPL(rtas_get_sensor); @@ -1424,7 +1425,7 @@ int rtas_get_sensor_fast(int sensor, int index, int *state) rc <= RTAS_EXTENDED_DELAY_MAX)); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; } @@ -1466,7 +1467,7 @@ int rtas_set_indicator(int indicator, int index, int new_value) } while (rtas_busy_delay(rc)); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; } EXPORT_SYMBOL_GPL(rtas_set_indicator); @@ -1488,7 +1489,7 @@ int rtas_set_indicator_fast(int indicator, int index, int new_value) rc <= RTAS_EXTENDED_DELAY_MAX)); if (rc < 0) - return rtas_error_rc(rc); + return rtas_generic_errno(rc); return rc; }
