linux-kernel - Re: [PATCH V1] mmc: sdhci-pci-gli: GL9763e: Mask the replay timer timeout of AER

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Message-ID: <d5a0fcf9-4ae0-4d0a-842e-d9475997cdb5@intel.com>
Date: Thu, 24 Jul 2025 14:59:04 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Victor Shih <victorshihgli@...il.com>, <ulf.hansson@...aro.org>
CC: <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<benchuanggli@...il.com>, <ben.chuang@...esyslogic.com.tw>,
	<HL.Liu@...esyslogic.com.tw>, Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V1] mmc: sdhci-pci-gli: GL9763e: Mask the replay timer
 timeout of AER

On 16/07/2025 13:43, Victor Shih wrote:
> From: Victor Shih <victor.shih@...esyslogic.com.tw>
> 
> Due to a flaw in the hardware design, the GL9763e replay timer frequently
> times out when ASPM is enabled. As a result, the warning messages will
> often appear in the system log when the system accesses the GL9763e
> PCI config. Therefore, the replay timer timeout must be masked.
> 
> Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
> ---
>  drivers/mmc/host/sdhci-pci-gli.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index 4c2ae71770f7..eb3954729a3c 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -1754,6 +1754,7 @@ static int gl9763e_add_host(struct sdhci_pci_slot *slot)
>  static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
>  {
>  	struct pci_dev *pdev = slot->chip->pdev;
> +	int aer;
>  	u32 value;
>  
>  	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
> @@ -1780,6 +1781,14 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
>  	value |= FIELD_PREP(GLI_9763E_HS400_RXDLY, GLI_9763E_HS400_RXDLY_5);
>  	pci_write_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, value);
>  
> +	/* mask the replay timer timeout of AER */
> +	aer = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
> +	if (aer) {
> +		pci_read_config_dword(pdev, aer + PCI_ERR_COR_MASK, &value);
> +		value |= PCI_ERR_COR_REP_TIMER;
> +		pci_write_config_dword(pdev, aer + PCI_ERR_COR_MASK, value);
> +	}

The same code is in gl9750_hw_setting() and gl9755_hw_setting()
so it could be a separate little function.

Also should gli_set_gl9763e() be renamed gl9763e_hw_setting() for
consistency?

Also should this have a fixes tag?

> +
>  	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
>  	value &= ~GLI_9763E_VHS_REV;
>  	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);