[PATCH 4/4] PCI: Create helper to print TLP Header and Prefix Log
From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date: 2024-02-06 13:58:08
Also in:
intel-wired-lan, linux-edac, linux-efi, linux-pci, linuxppc-dev, lkml
Subsystem:
intel ethernet drivers, networking drivers, pci enhanced error handling (eeh) for powerpc, pci subsystem, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Mahesh J Salgaonkar, Bjorn Helgaas, Linus Torvalds
Add pcie_print_tlp_log() helper to print TLP Header and Prefix Log. Print End-End Prefixes only if they are non-zero. Consolidate the few places which currently print TLP using custom formatting. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 +-- drivers/pci/pci.c | 28 +++++++++++++++++++ drivers/pci/pcie/aer.c | 10 ++----- drivers/pci/pcie/dpc.c | 5 +--- include/linux/aer.h | 2 ++ 5 files changed, 35 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 6ce720726a1a..73eabf3215e5 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c@@ -11355,8 +11355,8 @@ static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev, vf = FIELD_GET(0x7F, req_id); e_dev_err("VF %d has caused a PCIe error\n", vf); - e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: %8.8x\tdw3: %8.8x\n", - tlp_log.dw[0], tlp_log.dw[1], tlp_log.dw[2], tlp_log.dw[3]); + pcie_print_tlp_log(pdev, &tlp_log, ""); + switch (adapter->hw.mac.type) { case ixgbe_mac_82599EB: device_id = IXGBE_82599_VF_DEVICE_ID;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 268a5b9f1dff..d7974d25ae44 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c@@ -9,6 +9,7 @@ */ #include <linux/acpi.h> +#include <linux/array_size.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/dmi.h>
@@ -1118,6 +1119,33 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2, } EXPORT_SYMBOL_GPL(pcie_read_tlp_log); +/** + * pcie_print_tlp_log - Print TLP Header / Prefix Log contents + * @dev: PCIe device + * @tlp_log: TLP Log structure + * @pfx: Internal string prefix (for indentation) + * + * Prints TLP Header and Prefix Log information held by @tlp_log. + */ +void pcie_print_tlp_log(const struct pci_dev *dev, + const struct pcie_tlp_log *tlp_log, const char *pfx) +{ + unsigned int i; + + pci_err(dev, "%sTLP Header: %#010x %#010x %#010x %#010x", + pfx, tlp_log->dw[0], tlp_log->dw[1], tlp_log->dw[2], tlp_log->dw[3]); + + if (tlp_log->prefix[0]) + pr_cont(" E-E Prefixes:"); + for (i = 0; i < ARRAY_SIZE(tlp_log->prefix); i++) { + if (!tlp_log->prefix[i]) + break; + pr_cont(" %#010x", tlp_log->prefix[i]); + } + pr_cont("\n"); +} +EXPORT_SYMBOL_GPL(pcie_print_tlp_log); + /** * pci_restore_bars - restore a device's BAR values (e.g. after wake-up) * @dev: PCI device to have its BARs restored
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ecc1dea5a208..efb9e728fe94 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c@@ -664,12 +664,6 @@ static void pci_rootport_aer_stats_incr(struct pci_dev *pdev, } } -static void __print_tlp_header(struct pci_dev *dev, struct pcie_tlp_log *t) -{ - pci_err(dev, " TLP Header: %08x %08x %08x %08x\n", - t->dw[0], t->dw[1], t->dw[2], t->dw[3]); -} - static void __aer_print_error(struct pci_dev *dev, struct aer_err_info *info) {
@@ -724,7 +718,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info) __aer_print_error(dev, info); if (info->tlp_header_valid) - __print_tlp_header(dev, &info->tlp); + pcie_print_tlp_log(dev, &info->tlp, " "); out: if (info->id && info->error_dev_num > 1 && info->id == id)
@@ -796,7 +790,7 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity, aer->uncor_severity); if (tlp_header_valid) - __print_tlp_header(dev, &aer->header_log); + pcie_print_tlp_log(dev, &aer->header_log, " "); trace_aer_event(dev_name(&dev->dev), (status & ~mask), aer_severity, tlp_header_valid, &aer->header_log);
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index f384d0b02aa0..9c93871fbe37 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c@@ -229,10 +229,7 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev) pcie_read_tlp_log(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG, cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, dpc_tlp_log_len(pdev), &tlp_log); - pci_err(pdev, "TLP Header: %#010x %#010x %#010x %#010x\n", - tlp_log.dw[0], tlp_log.dw[1], tlp_log.dw[2], tlp_log.dw[3]); - for (i = 0; i < pdev->dpc_rp_log_size - 5; i++) - pci_err(pdev, "TLP Prefix Header: dw%d, %#010x\n", i, tlp_log.prefix[i]); + pcie_print_tlp_log(pdev, &tlp_log, ""); if (pdev->dpc_rp_log_size < 5) goto clear_status;
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 9a8845c01400..210f497e7cdd 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h@@ -41,6 +41,8 @@ struct aer_capability_regs { int pcie_read_tlp_log(struct pci_dev *pdev, int where, int where2, unsigned int tlp_len, struct pcie_tlp_log *tlp_log); unsigned int aer_tlp_log_len(struct pci_dev *dev); +void pcie_print_tlp_log(const struct pci_dev *dev, + const struct pcie_tlp_log *tlp_log, const char *pfx); #if defined(CONFIG_PCIEAER) int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
--
2.39.2