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PCI/AER: Generalize TLP Header Log reading

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Both AER and DPC RP PIO provide TLP Header Log registers (PCIe r6.1 secs
7.8.4 & 7.9.14) to convey error diagnostics but the struct is named after
AER as the struct aer_header_log_regs. Also, not all places that handle TLP
Header Log use the struct and the struct members are named individually.

Generalize the struct name and members, and use it consistently where TLP
Header Log is being handled so that a pcie_read_tlp_log() helper can be
easily added.

Link: https://lore.kernel.org/r/20240206135717.8565-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
[bhelgaas: drop ixgbe changes for now, tidy whitespace]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ilpo Järvinen 2024-02-06 15:57:15 +02:00 committed by Bjorn Helgaas
parent a37e12bcab
commit 0a5a46a6a6
7 changed files with 48 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/firmware/efi/cper.c
View File

@ -445,8 +445,8 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
printk("%saer_uncor_severity: 0x%08x\n",
pfx, aer->uncor_severity);
printk("%sTLP Header: %08x %08x %08x %08x\n", pfx,
aer->header_log.dw0, aer->header_log.dw1,
aer->header_log.dw2, aer->header_log.dw3);
aer->header_log.dw[0], aer->header_log.dw[1],
aer->header_log.dw[2], aer->header_log.dw[3]);
}
}

28
drivers/pci/pci.c
View File

@ -1067,6 +1067,34 @@ static void pci_enable_acs(struct pci_dev *dev)
pci_disable_acs_redir(dev);
}
/**
* pcie_read_tlp_log - read TLP Header Log
* @dev: PCIe device
* @where: PCI Config offset of TLP Header Log
* @tlp_log: TLP Log structure to fill
*
* Fill @tlp_log from TLP Header Log registers, e.g., AER or DPC.
*
* Return: 0 on success and filled TLP Log structure, <0 on error.
*/
int pcie_read_tlp_log(struct pci_dev *dev, int where,
struct pcie_tlp_log *tlp_log)
{
int i, ret;
memset(tlp_log, 0, sizeof(*tlp_log));
for (i = 0; i < 4; i++) {
ret = pci_read_config_dword(dev, where + i * 4,
&tlp_log->dw[i]);
if (ret)
return pcibios_err_to_errno(ret);
}
return 0;
}
EXPORT_SYMBOL_GPL(pcie_read_tlp_log);
/**
* pci_restore_bars - restore a device's BAR values (e.g. after wake-up)
* @dev: PCI device to have its BARs restored

2
drivers/pci/pci.h
View File

@ -409,7 +409,7 @@ struct aer_err_info {
unsigned int status; /* COR/UNCOR Error Status */
unsigned int mask; /* COR/UNCOR Error Mask */
struct aer_header_log_regs tlp; /* TLP Header */
struct pcie_tlp_log tlp; /* TLP Header */
};
int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);

14
drivers/pci/pcie/aer.c
View File

@ -664,11 +664,10 @@ static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
}
}
static void __print_tlp_header(struct pci_dev *dev,
struct aer_header_log_regs *t)
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->dw0, t->dw1, t->dw2, t->dw3);
t->dw[0], t->dw[1], t->dw[2], t->dw[3]);
}
static void __aer_print_error(struct pci_dev *dev,
@ -1246,14 +1245,7 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
if (info->status & AER_LOG_TLP_MASKS) {
info->tlp_header_valid = 1;
pci_read_config_dword(dev,
aer + PCI_ERR_HEADER_LOG, &info->tlp.dw0);
pci_read_config_dword(dev,
aer + PCI_ERR_HEADER_LOG + 4, &info->tlp.dw1);
pci_read_config_dword(dev,
aer + PCI_ERR_HEADER_LOG + 8, &info->tlp.dw2);
pci_read_config_dword(dev,
aer + PCI_ERR_HEADER_LOG + 12, &info->tlp.dw3);
pcie_read_tlp_log(dev, aer + PCI_ERR_HEADER_LOG, &info->tlp);
}
}

14
drivers/pci/pcie/dpc.c
View File

@ -190,7 +190,8 @@ pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
static void dpc_process_rp_pio_error(struct pci_dev *pdev)
{
u16 cap = pdev->dpc_cap, dpc_status, first_error;
u32 status, mask, sev, syserr, exc, dw0, dw1, dw2, dw3, log, prefix;
u32 status, mask, sev, syserr, exc, log, prefix;
struct pcie_tlp_log tlp_log;
int i;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, &status);
@ -216,16 +217,9 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev)
if (pdev->dpc_rp_log_size < 4)
goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
&dw0);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 4,
&dw1);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 8,
&dw2);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 12,
&dw3);
pcie_read_tlp_log(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG, &tlp_log);
pci_err(pdev, "TLP Header: %#010x %#010x %#010x %#010x\n",
dw0, dw1, dw2, dw3);
tlp_log.dw[0], tlp_log.dw[1], tlp_log.dw[2], tlp_log.dw[3]);
if (pdev->dpc_rp_log_size < 5)
goto clear_status;

11
include/linux/aer.h
View File

@ -18,11 +18,8 @@
struct pci_dev;
struct aer_header_log_regs {
u32 dw0;
u32 dw1;
u32 dw2;
u32 dw3;
struct pcie_tlp_log {
u32 dw[4];
};
struct aer_capability_regs {
@ -33,13 +30,15 @@ struct aer_capability_regs {
u32 cor_status;
u32 cor_mask;
u32 cap_control;
struct aer_header_log_regs header_log;
struct pcie_tlp_log header_log;
u32 root_command;
u32 root_status;
u16 cor_err_source;
u16 uncor_err_source;
};
int pcie_read_tlp_log(struct pci_dev *dev, int where, struct pcie_tlp_log *log);
#if defined(CONFIG_PCIEAER)
int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
int pcie_aer_is_native(struct pci_dev *dev);

10
include/ras/ras_event.h
View File

@ -300,7 +300,7 @@ TRACE_EVENT(aer_event,
const u32 status,
const u8 severity,
const u8 tlp_header_valid,
struct aer_header_log_regs *tlp),
struct pcie_tlp_log *tlp),
TP_ARGS(dev_name, status, severity, tlp_header_valid, tlp),
@ -318,10 +318,10 @@ TRACE_EVENT(aer_event,
__entry->severity = severity;
__entry->tlp_header_valid = tlp_header_valid;
if (tlp_header_valid) {
__entry->tlp_header[0] = tlp->dw0;
__entry->tlp_header[1] = tlp->dw1;
__entry->tlp_header[2] = tlp->dw2;
__entry->tlp_header[3] = tlp->dw3;
__entry->tlp_header[0] = tlp->dw[0];
__entry->tlp_header[1] = tlp->dw[1];
__entry->tlp_header[2] = tlp->dw[2];
__entry->tlp_header[3] = tlp->dw[3];
}
),