summaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/powernv
diff options
context:
space:
mode:
authorRussell Currey <ruscur@russell.cc>2017-06-14 14:19:58 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2017-06-27 12:14:26 +1000
commit31bbd45af313c3b1cdaa98e5a2de65194cf7d948 (patch)
tree1933c646cb0671e28f7479ad68abdb71ab3f0239 /arch/powerpc/platforms/powernv
parent2bafb7ffa3e0908ad2e69b94c436a0326ef2e7e1 (diff)
powerpc/powernv/pci: Reduce spam when dumping PEST
Dumping the PE State Tables (PEST) can be highly verbose if a number of PEs are affected, especially in the case where the whole PHB is frozen and 512 lines get printed. Check for duplicates when dumping the PEST to reduce useless output. For example: PE[0f8] A/B: 9700002600000000 80000080d00000f8 PE[0f9] A/B: 8000000000000000 0000000000000000 PE[..0fe] A/B: as above PE[0ff] A/B: 8440002b00000000 0000000000000000 instead of: PE[0f8] A/B: 9700002600000000 80000080d00000f8 PE[0f9] A/B: 8000000000000000 0000000000000000 PE[0fa] A/B: 8000000000000000 0000000000000000 PE[0fb] A/B: 8000000000000000 0000000000000000 PE[0fc] A/B: 8000000000000000 0000000000000000 PE[0fd] A/B: 8000000000000000 0000000000000000 PE[0fe] A/B: 8000000000000000 0000000000000000 PE[0ff] A/B: 8440002b00000000 0000000000000000 and you can imagine how much worse it can get for 512 PEs. Signed-off-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv')
-rw-r--r--arch/powerpc/platforms/powernv/pci.c51
-rw-r--r--arch/powerpc/platforms/powernv/pci.h3
2 files changed, 34 insertions, 20 deletions
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index 935ccb249a8a..40071ad0bc42 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -227,11 +227,39 @@ void pnv_teardown_msi_irqs(struct pci_dev *pdev)
}
#endif /* CONFIG_PCI_MSI */
+/* Nicely print the contents of the PE State Tables (PEST). */
+static void pnv_pci_dump_pest(__be64 pestA[], __be64 pestB[], int pest_size)
+{
+ __be64 prevA = ULONG_MAX, prevB = ULONG_MAX;
+ bool dup = false;
+ int i;
+
+ for (i = 0; i < pest_size; i++) {
+ __be64 peA = be64_to_cpu(pestA[i]);
+ __be64 peB = be64_to_cpu(pestB[i]);
+
+ if (peA != prevA || peB != prevB) {
+ if (dup) {
+ pr_info("PE[..%03x] A/B: as above\n", i-1);
+ dup = false;
+ }
+ prevA = peA;
+ prevB = peB;
+ if (peA & PNV_IODA_STOPPED_STATE ||
+ peB & PNV_IODA_STOPPED_STATE)
+ pr_info("PE[%03x] A/B: %016llx %016llx\n",
+ i, peA, peB);
+ } else if (!dup && (peA & PNV_IODA_STOPPED_STATE ||
+ peB & PNV_IODA_STOPPED_STATE)) {
+ dup = true;
+ }
+ }
+}
+
static void pnv_pci_dump_p7ioc_diag_data(struct pci_controller *hose,
struct OpalIoPhbErrorCommon *common)
{
struct OpalIoP7IOCPhbErrorData *data;
- int i;
data = (struct OpalIoP7IOCPhbErrorData *)common;
pr_info("P7IOC PHB#%x Diag-data (Version: %d)\n",
@@ -308,22 +336,13 @@ static void pnv_pci_dump_p7ioc_diag_data(struct pci_controller *hose,
be64_to_cpu(data->dma1ErrorLog0),
be64_to_cpu(data->dma1ErrorLog1));
- for (i = 0; i < OPAL_P7IOC_NUM_PEST_REGS; i++) {
- if ((be64_to_cpu(data->pestA[i]) >> 63) == 0 &&
- (be64_to_cpu(data->pestB[i]) >> 63) == 0)
- continue;
-
- pr_info("PE[%3d] A/B: %016llx %016llx\n",
- i, be64_to_cpu(data->pestA[i]),
- be64_to_cpu(data->pestB[i]));
- }
+ pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_P7IOC_NUM_PEST_REGS);
}
static void pnv_pci_dump_phb3_diag_data(struct pci_controller *hose,
struct OpalIoPhbErrorCommon *common)
{
struct OpalIoPhb3ErrorData *data;
- int i;
data = (struct OpalIoPhb3ErrorData*)common;
pr_info("PHB3 PHB#%x Diag-data (Version: %d)\n",
@@ -404,15 +423,7 @@ static void pnv_pci_dump_phb3_diag_data(struct pci_controller *hose,
be64_to_cpu(data->dma1ErrorLog0),
be64_to_cpu(data->dma1ErrorLog1));
- for (i = 0; i < OPAL_PHB3_NUM_PEST_REGS; i++) {
- if ((be64_to_cpu(data->pestA[i]) >> 63) == 0 &&
- (be64_to_cpu(data->pestB[i]) >> 63) == 0)
- continue;
-
- pr_info("PE[%3d] A/B: %016llx %016llx\n",
- i, be64_to_cpu(data->pestA[i]),
- be64_to_cpu(data->pestB[i]));
- }
+ pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_PHB3_NUM_PEST_REGS);
}
void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 18c8a2fa03b8..6abc77dd9261 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -33,6 +33,9 @@ enum pnv_phb_model {
#define PNV_IODA_PE_SLAVE (1 << 4) /* Slave PE in compound case */
#define PNV_IODA_PE_VF (1 << 5) /* PE for one VF */
+/* Indicates operations are frozen for a PE: MMIO in PESTA & DMA in PESTB. */
+#define PNV_IODA_STOPPED_STATE 0x8000000000000000
+
/* Data associated with a PE, including IOMMU tracking etc.. */
struct pnv_phb;
struct pnv_ioda_pe {