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Subject: Re: [PATCH v2] PCI/AER: update AER status string print to match other
 AER logs
To:     helgaas@kernel.org
References: <1518034285-3543-1-git-send-email-tbaicar@codeaurora.org>
Cc:     bhelgaas@google.com, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org
From:   Tyler Baicar <tbaicar@codeaurora.org>
Message-ID: <469cc694-405a-b9f3-5e92-f657e8dbda47@codeaurora.org>
Date:   Tue, 27 Feb 2018 14:33:51 -0500
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Hello Bjorn,


On 2/7/2018 3:11 PM, Tyler Baicar wrote:
> Currently the AER driver uses cper_print_bits() to print the AER status
> string. This causes the status string to not include the proper PCI device
> name prefix that the other AER prints include. Also, it has a different
> print level than all the other AER prints, and there is a potential to
> have multiple status prints based on string lengths.
>
> Update the AER driver to print the AER status string with the proper string
> prefix and proper print level, and abreviate the status strings similar to
> lspci -vv prints so they can be printed on the same line.
>
> Previous log example:
>
> e1000e 0003:01:00.1: aer_status: 0x00000041, aer_mask: 0x00000000
> Receiver Error, Bad TLP
> e1000e 0003:01:00.1: aer_layer=Physical Layer, aer_agent=Receiver ID
> pcieport 0003:00:00.0: aer_status: 0x00001000, aer_mask: 0x0000e000
> Replay Timer Timeout
> pcieport 0003:00:00.0: aer_layer=Data Link Layer, aer_agent=Transmitter ID
>
> New log:
>
> e1000e 0003:01:00.1: aer_status: 0x00000041, aer_mask: 0x00000000
> e1000e 0003:01:00.1: RxErr, BadTLP
> e1000e 0003:01:00.1: aer_layer=Physical Layer, aer_agent=Receiver ID
> pcieport 0003:00:00.0: aer_status: 0x00001000, aer_mask: 0x0000e000
> pcieport 0003:00:00.0: Timeout
> pcieport 0003:00:00.0: aer_layer=Data Link Layer, aer_agent=Transmitter ID
Do you think this is ready for merge now?

Thanks,
Tyler
>
> Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
> ---
>   drivers/pci/pcie/aer/aerdrv_errprint.c | 71 ++++++++++++++++++++++------------
>   1 file changed, 47 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
> index 6a352e6..bb68dd4 100644
> --- a/drivers/pci/pcie/aer/aerdrv_errprint.c
> +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
> @@ -72,22 +72,22 @@
>   };
>   
>   static const char *aer_correctable_error_string[] = {
> -	"Receiver Error",		/* Bit Position 0	*/
> +	"RxErr",			/* Bit Position 0	*/
>   	NULL,
>   	NULL,
>   	NULL,
>   	NULL,
>   	NULL,
> -	"Bad TLP",			/* Bit Position 6	*/
> -	"Bad DLLP",			/* Bit Position 7	*/
> -	"RELAY_NUM Rollover",		/* Bit Position 8	*/
> +	"BadTLP",			/* Bit Position 6	*/
> +	"BadDLLP",			/* Bit Position 7	*/
> +	"Rollover",			/* Bit Position 8	*/
>   	NULL,
>   	NULL,
>   	NULL,
> -	"Replay Timer Timeout",		/* Bit Position 12	*/
> -	"Advisory Non-Fatal",		/* Bit Position 13	*/
> -	"Corrected Internal Error",	/* Bit Position 14	*/
> -	"Header Log Overflow",		/* Bit Position 15	*/
> +	"Timeout",			/* Bit Position 12	*/
> +	"NonFatalErr",			/* Bit Position 13	*/
> +	"CorrIntErr",			/* Bit Position 14	*/
> +	"HeaderOF",			/* Bit Position 15	*/
>   };
>   
>   static const char *aer_uncorrectable_error_string[] = {
> @@ -95,28 +95,28 @@
>   	NULL,
>   	NULL,
>   	NULL,
> -	"Data Link Protocol",		/* Bit Position 4	*/
> -	"Surprise Down Error",		/* Bit Position 5	*/
> +	"DLP",				/* Bit Position 4	*/
> +	"SDES",				/* Bit Position 5	*/
>   	NULL,
>   	NULL,
>   	NULL,
>   	NULL,
>   	NULL,
>   	NULL,
> -	"Poisoned TLP",			/* Bit Position 12	*/
> -	"Flow Control Protocol",	/* Bit Position 13	*/
> -	"Completion Timeout",		/* Bit Position 14	*/
> -	"Completer Abort",		/* Bit Position 15	*/
> -	"Unexpected Completion",	/* Bit Position 16	*/
> -	"Receiver Overflow",		/* Bit Position 17	*/
> -	"Malformed TLP",		/* Bit Position 18	*/
> +	"TLP",				/* Bit Position 12	*/
> +	"FCP",				/* Bit Position 13	*/
> +	"CmpltTO",			/* Bit Position 14	*/
> +	"CmpltAbrt",			/* Bit Position 15	*/
> +	"UnxCmplt",			/* Bit Position 16	*/
> +	"RxOF",				/* Bit Position 17	*/
> +	"MalfTLP",			/* Bit Position 18	*/
>   	"ECRC",				/* Bit Position 19	*/
> -	"Unsupported Request",		/* Bit Position 20	*/
> -	"ACS Violation",		/* Bit Position 21	*/
> -	"Uncorrectable Internal Error",	/* Bit Position 22	*/
> -	"MC Blocked TLP",		/* Bit Position 23	*/
> -	"AtomicOp Egress Blocked",	/* Bit Position 24	*/
> -	"TLP Prefix Blocked Error",	/* Bit Position 25	*/
> +	"UnsupReq",			/* Bit Position 20	*/
> +	"ACSViol",			/* Bit Position 21	*/
> +	"UncorrIntErr",			/* Bit Position 22	*/
> +	"BlockedTLP",			/* Bit Position 23	*/
> +	"AtomicOpBlocked",		/* Bit Position 24	*/
> +	"TLPBlockedErr",		/* Bit Position 25	*/
>   };
>   
>   static const char *aer_agent_string[] = {
> @@ -203,6 +203,29 @@ void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
>   }
>   
>   #ifdef CONFIG_ACPI_APEI_PCIEAER
> +
> +#define MAX_PRINT_LENGTH		120
> +
> +void dev_print_bits(struct pci_dev *dev, unsigned int bits,
> +		    const char * const strs[], unsigned int strs_size)
> +{
> +	unsigned int i;
> +	char errs[MAX_PRINT_LENGTH];
> +
> +	errs[0] = '\0';
> +
> +	for (i = 0; i < strs_size; i++) {
> +		if (!(bits & (1U << i)))
> +			continue;
> +		if (strs[i]) {
> +			if (strlen(errs))
> +				strlcat(errs, ", ", MAX_PRINT_LENGTH);
> +			strlcat(errs, strs[i], MAX_PRINT_LENGTH);
> +		}
> +	}
> +	dev_err(&dev->dev, "%s\n", errs);
> +}
> +
>   int cper_severity_to_aer(int cper_severity)
>   {
>   	switch (cper_severity) {
> @@ -240,7 +263,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity,
>   	agent = AER_GET_AGENT(aer_severity, status);
>   
>   	pci_err(dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask);
> -	cper_print_bits("", status, status_strs, status_strs_size);
> +	dev_print_bits(dev, status, status_strs, status_strs_size);
>   	pci_err(dev, "aer_layer=%s, aer_agent=%s\n",
>   		aer_error_layer[layer], aer_agent_string[agent]);
>   

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