diff options
| author | Gavin Shan <shangw@linux.vnet.ibm.com> | 2012-02-27 20:04:00 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-03-09 11:11:01 +1100 |
| commit | 8d633291b4fc0539ecad31f972447104be6953ec (patch) | |
| tree | 7be9e4d58a8289ba843e632974873bead839a458 /arch/powerpc/platforms/pseries/eeh_pseries.c | |
| parent | 2652481f75186940c4608f68c9fd76b32ec9b159 (diff) | |
powerpc/eeh: pseries platform EEH error log retrieval
On RTAS compliant pSeries platform, one dedicated RTAS call has
been introduced to retrieve EEH temporary or permanent error log.
The patch implements the function of retriving EEH error log through
RTAS call. Besides, it has been abstracted by struct eeh_ops::get_log
so that EEH core components could support multiple platforms in future.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/eeh_pseries.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_pseries.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index 6643e0677e9..7c8434f902b 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -56,6 +56,15 @@ static int ibm_get_config_addr_info2; static int ibm_configure_bridge; static int ibm_configure_pe; +/* + * Buffer for reporting slot-error-detail rtas calls. Its here + * in BSS, and not dynamically alloced, so that it ends up in + * RMO where RTAS can access it. + */ +static unsigned char slot_errbuf[RTAS_ERROR_LOG_MAX]; +static DEFINE_SPINLOCK(slot_errbuf_lock); +static int eeh_error_buf_size; + /** * pseries_eeh_init - EEH platform dependent initialization * @@ -107,6 +116,19 @@ static int pseries_eeh_init(void) return -EINVAL; } + /* Initialize error log lock and size */ + spin_lock_init(&slot_errbuf_lock); + eeh_error_buf_size = rtas_token("rtas-error-log-max"); + if (eeh_error_buf_size == RTAS_UNKNOWN_SERVICE) { + pr_warning("%s: unknown EEH error log size\n", + __func__); + eeh_error_buf_size = 1024; + } else if (eeh_error_buf_size > RTAS_ERROR_LOG_MAX) { + pr_warning("%s: EEH error log size %d exceeds the maximal %d\n", + __func__, eeh_error_buf_size, RTAS_ERROR_LOG_MAX); + eeh_error_buf_size = RTAS_ERROR_LOG_MAX; + } + return 0; } @@ -415,7 +437,30 @@ static int pseries_eeh_wait_state(struct device_node *dn, int max_wait) */ static int pseries_eeh_get_log(struct device_node *dn, int severity, char *drv_log, unsigned long len) { - return 0; + struct pci_dn *pdn; + int config_addr; + unsigned long flags; + int ret; + + pdn = PCI_DN(dn); + spin_lock_irqsave(&slot_errbuf_lock, flags); + memset(slot_errbuf, 0, eeh_error_buf_size); + + /* Figure out the PE address */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + + ret = rtas_call(ibm_slot_error_detail, 8, 1, NULL, config_addr, + BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid), + virt_to_phys(drv_log), len, + virt_to_phys(slot_errbuf), eeh_error_buf_size, + severity); + if (!ret) + log_error(slot_errbuf, ERR_TYPE_RTAS_LOG, 0); + spin_unlock_irqrestore(&slot_errbuf_lock, flags); + + return ret; } /** |