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authorGavin Shan <shangw@linux.vnet.ibm.com>2013-06-20 13:21:11 +0800
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-06-20 17:06:37 +1000
commitbf90dfea2397fe136ce35bc896c3bc84133272c6 (patch)
treef5537c9e21235d04321064856473fbe454326fda /arch/powerpc/platforms/powernv/eeh-ioda.c
parent9d5cab00108f42a5ab51cfb1fcb03130679a5762 (diff)
powerpc/eeh: I/O chip PE log and bridge setup
The patch adds backends to retrieve error log and configure p2p bridges for the indicated PE. 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/powernv/eeh-ioda.c')
-rw-r--r--arch/powerpc/platforms/powernv/eeh-ioda.c57
1 files changed, 55 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index ea5fa05f8bbf..8d9c2d232d2a 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -445,12 +445,65 @@ static int ioda_eeh_reset(struct eeh_pe *pe, int option)
return ret;
}
+/**
+ * ioda_eeh_get_log - Retrieve error log
+ * @pe: EEH PE
+ * @severity: Severity level of the log
+ * @drv_log: buffer to store the log
+ * @len: space of the log buffer
+ *
+ * The function is used to retrieve error log from P7IOC.
+ */
+static int ioda_eeh_get_log(struct eeh_pe *pe, int severity,
+ char *drv_log, unsigned long len)
+{
+ s64 ret;
+ unsigned long flags;
+ struct pci_controller *hose = pe->phb;
+ struct pnv_phb *phb = hose->private_data;
+
+ spin_lock_irqsave(&phb->lock, flags);
+
+ ret = opal_pci_get_phb_diag_data2(phb->opal_id,
+ phb->diag.blob, PNV_PCI_DIAG_BUF_SIZE);
+ if (ret) {
+ spin_unlock_irqrestore(&phb->lock, flags);
+ pr_warning("%s: Failed to get log for PHB#%x-PE#%x\n",
+ __func__, hose->global_number, pe->addr);
+ return -EIO;
+ }
+
+ /*
+ * FIXME: We probably need log the error in somewhere.
+ * Lets make it up in future.
+ */
+ /* pr_info("%s", phb->diag.blob); */
+
+ spin_unlock_irqrestore(&phb->lock, flags);
+
+ return 0;
+}
+
+/**
+ * ioda_eeh_configure_bridge - Configure the PCI bridges for the indicated PE
+ * @pe: EEH PE
+ *
+ * For particular PE, it might have included PCI bridges. In order
+ * to make the PE work properly, those PCI bridges should be configured
+ * correctly. However, we need do nothing on P7IOC since the reset
+ * function will do everything that should be covered by the function.
+ */
+static int ioda_eeh_configure_bridge(struct eeh_pe *pe)
+{
+ return 0;
+}
+
struct pnv_eeh_ops ioda_eeh_ops = {
.post_init = ioda_eeh_post_init,
.set_option = ioda_eeh_set_option,
.get_state = ioda_eeh_get_state,
.reset = ioda_eeh_reset,
- .get_log = NULL,
- .configure_bridge = NULL,
+ .get_log = ioda_eeh_get_log,
+ .configure_bridge = ioda_eeh_configure_bridge,
.next_error = NULL
};

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