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scsi: ufs: handle errors from PHY_ADAPTER_ERROR register
The PHY_ADAPTER_ERROR status register indicates PHY lane errors reported by the M-PHY layer. In some occasions the controller can recover from such errors. When the error is not recoverable, a stuck DB error will occur. Since the stuck DB error is spotted separately, no action other than clearing the register is necessary. Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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2 changed files with 12 additions and 0 deletions
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@ -4215,6 +4215,17 @@ static void ufshcd_update_uic_error(struct ufs_hba *hba)
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{
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u32 reg;
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/* PHY layer lane error */
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reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER);
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/* Ignore LINERESET indication, as this is not an error */
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if ((reg & UIC_PHY_ADAPTER_LAYER_ERROR) &&
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(reg & UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK))
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/*
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* To know whether this error is fatal or not, DB timeout
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* must be checked but this error is handled separately.
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*/
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dev_dbg(hba->dev, "%s: UIC Lane error reported\n", __func__);
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/* PA_INIT_ERROR is fatal and needs UIC reset */
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reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER);
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if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT)
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@ -168,6 +168,7 @@ enum {
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/* UECPA - Host UIC Error Code PHY Adapter Layer 38h */
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#define UIC_PHY_ADAPTER_LAYER_ERROR UFS_BIT(31)
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#define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK 0x1F
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#define UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK 0xF
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/* UECDL - Host UIC Error Code Data Link Layer 3Ch */
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#define UIC_DATA_LINK_LAYER_ERROR UFS_BIT(31)
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