diff mbox series

[v4,18/23] PCI/AER: Refactor cper_print_aer() for use by CXL driver module

Message ID 20230523232214.55282-19-terry.bowman@amd.com
State Superseded
Headers show
Series cxl/pci: Add support for RCH RAS error handling | expand

Commit Message

Bowman, Terry May 23, 2023, 11:22 p.m. UTC 
The CXL driver plans to use cper_print_aer() for logging restricted CXL
host (RCH) AER errors. cper_print_aer() is not currently exported and
therefore not usable by the CXL driver built as a loadable module. Export
the cper_print_aer() function making it available.

The CONFIG_ACPI_APEI_PCIEAER kernel config is currently used to enable
cper_print_aer(). cper_print_aer() logs the AER registers and is
useful in PCIE AER logging outside of APEI. Remove the
CONFIG_ACPI_APEI_PCIEAER dependency to enable cper_print_aer().

The cper_print_aer() function name implies CPER specific use but is useful
in non-CPER cases as well. Rename cper_print_aer() to pci_print_aer().

Co-developed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
Cc: "Oliver O'Halloran" <oohall@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/pci/pcie/aer.c | 9 +++++----
 include/linux/aer.h    | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

Comments

Bjorn Helgaas May 24, 2023, 4:55 p.m. UTC | #1 
On Tue, May 23, 2023 at 06:22:09PM -0500, Terry Bowman wrote:
> The CXL driver plans to use cper_print_aer() for logging restricted CXL
> host (RCH) AER errors. cper_print_aer() is not currently exported and
> therefore not usable by the CXL driver built as a loadable module. Export
> the cper_print_aer() function making it available.
> 
> The CONFIG_ACPI_APEI_PCIEAER kernel config is currently used to enable
> cper_print_aer(). cper_print_aer() logs the AER registers and is
> useful in PCIE AER logging outside of APEI. Remove the
> CONFIG_ACPI_APEI_PCIEAER dependency to enable cper_print_aer().
> 
> The cper_print_aer() function name implies CPER specific use but is useful
> in non-CPER cases as well. Rename cper_print_aer() to pci_print_aer().
> 
> Co-developed-by: Robert Richter <rrichter@amd.com>
> Signed-off-by: Robert Richter <rrichter@amd.com>
> Signed-off-by: Terry Bowman <terry.bowman@amd.com>
> Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
> Cc: "Oliver O'Halloran" <oohall@gmail.com>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: linux-pci@vger.kernel.org
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Acked-by: Bjorn Helgaas <bhelgaas@google.com>

> ---
>  drivers/pci/pcie/aer.c | 9 +++++----
>  include/linux/aer.h    | 2 +-
>  2 files changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index f6c24ded134c..d3344fcf1f79 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -771,9 +771,10 @@ int cper_severity_to_aer(int cper_severity)
>  	}
>  }
>  EXPORT_SYMBOL_GPL(cper_severity_to_aer);
> +#endif
>  
> -void cper_print_aer(struct pci_dev *dev, int aer_severity,
> -		    struct aer_capability_regs *aer)
> +void pci_print_aer(struct pci_dev *dev, int aer_severity,
> +		   struct aer_capability_regs *aer)
>  {
>  	int layer, agent, tlp_header_valid = 0;
>  	u32 status, mask;
> @@ -812,7 +813,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity,
>  	trace_aer_event(dev_name(&dev->dev), (status & ~mask),
>  			aer_severity, tlp_header_valid, &aer->header_log);
>  }
> -#endif
> +EXPORT_SYMBOL_NS_GPL(pci_print_aer, CXL);
>  
>  /**
>   * add_error_device - list device to be handled
> @@ -1009,7 +1010,7 @@ static void aer_recover_work_func(struct work_struct *work)
>  			       PCI_SLOT(entry.devfn), PCI_FUNC(entry.devfn));
>  			continue;
>  		}
> -		cper_print_aer(pdev, entry.severity, entry.regs);
> +		pci_print_aer(pdev, entry.severity, entry.regs);
>  		if (entry.severity == AER_NONFATAL)
>  			pcie_do_recovery(pdev, pci_channel_io_normal,
>  					 aer_root_reset);
> diff --git a/include/linux/aer.h b/include/linux/aer.h
> index 97f64ba1b34a..8f124b904314 100644
> --- a/include/linux/aer.h
> +++ b/include/linux/aer.h
> @@ -64,7 +64,7 @@ static inline void pci_save_aer_state(struct pci_dev *dev) {}
>  static inline void pci_restore_aer_state(struct pci_dev *dev) {}
>  #endif
>  
> -void cper_print_aer(struct pci_dev *dev, int aer_severity,
> +void pci_print_aer(struct pci_dev *dev, int aer_severity,
>  		    struct aer_capability_regs *aer);
>  int cper_severity_to_aer(int cper_severity);
>  void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,
> -- 
> 2.34.1
>
Bowman, Terry May 25, 2023, 9:38 p.m. UTC | #2 
On 5/24/23 11:55, Bjorn Helgaas wrote:
> On Tue, May 23, 2023 at 06:22:09PM -0500, Terry Bowman wrote:
>> The CXL driver plans to use cper_print_aer() for logging restricted CXL
>> host (RCH) AER errors. cper_print_aer() is not currently exported and
>> therefore not usable by the CXL driver built as a loadable module. Export
>> the cper_print_aer() function making it available.
>>
>> The CONFIG_ACPI_APEI_PCIEAER kernel config is currently used to enable
>> cper_print_aer(). cper_print_aer() logs the AER registers and is
>> useful in PCIE AER logging outside of APEI. Remove the
>> CONFIG_ACPI_APEI_PCIEAER dependency to enable cper_print_aer().
>>
>> The cper_print_aer() function name implies CPER specific use but is useful
>> in non-CPER cases as well. Rename cper_print_aer() to pci_print_aer().
>>
>> Co-developed-by: Robert Richter <rrichter@amd.com>
>> Signed-off-by: Robert Richter <rrichter@amd.com>
>> Signed-off-by: Terry Bowman <terry.bowman@amd.com>
>> Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
>> Cc: "Oliver O'Halloran" <oohall@gmail.com>
>> Cc: Bjorn Helgaas <bhelgaas@google.com>
>> Cc: linux-pci@vger.kernel.org
>> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> 

Thank you Bjorn.

Regards,
Terry
diff mbox series

Patch

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index f6c24ded134c..d3344fcf1f79 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -771,9 +771,10 @@  int cper_severity_to_aer(int cper_severity)
 	}
 }
 EXPORT_SYMBOL_GPL(cper_severity_to_aer);
+#endif
 
-void cper_print_aer(struct pci_dev *dev, int aer_severity,
-		    struct aer_capability_regs *aer)
+void pci_print_aer(struct pci_dev *dev, int aer_severity,
+		   struct aer_capability_regs *aer)
 {
 	int layer, agent, tlp_header_valid = 0;
 	u32 status, mask;
@@ -812,7 +813,7 @@  void cper_print_aer(struct pci_dev *dev, int aer_severity,
 	trace_aer_event(dev_name(&dev->dev), (status & ~mask),
 			aer_severity, tlp_header_valid, &aer->header_log);
 }
-#endif
+EXPORT_SYMBOL_NS_GPL(pci_print_aer, CXL);
 
 /**
  * add_error_device - list device to be handled
@@ -1009,7 +1010,7 @@  static void aer_recover_work_func(struct work_struct *work)
 			       PCI_SLOT(entry.devfn), PCI_FUNC(entry.devfn));
 			continue;
 		}
-		cper_print_aer(pdev, entry.severity, entry.regs);
+		pci_print_aer(pdev, entry.severity, entry.regs);
 		if (entry.severity == AER_NONFATAL)
 			pcie_do_recovery(pdev, pci_channel_io_normal,
 					 aer_root_reset);
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 97f64ba1b34a..8f124b904314 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -64,7 +64,7 @@  static inline void pci_save_aer_state(struct pci_dev *dev) {}
 static inline void pci_restore_aer_state(struct pci_dev *dev) {}
 #endif
 
-void cper_print_aer(struct pci_dev *dev, int aer_severity,
+void pci_print_aer(struct pci_dev *dev, int aer_severity,
 		    struct aer_capability_regs *aer);
 int cper_severity_to_aer(int cper_severity);
 void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,