Hi Alim, Thank you for your review! > From: Alim Akhtar, Sent: Thursday, April 14, 2022 1:39 PM > > Hi Yoshihiro > > >From: Yoshihiro Shimoda [mailto:yoshihiro.shimoda.uh@xxxxxxxxxxx] > >Sent: Thursday, April 14, 2022 8:01 AM > > > >Add UFSHCD_QUIRK_BROKEN_64BIT_ADDRESS for a broken host controller of > >the 64-bit addressing supported capability. > > > A little more details in the commit message will help to understand the > changes more. > Does it mean this HCI has other addressing mode (other than 32 and 64)? > Like a 36bit address? In that case, does Host controller is behind any > IOMMU? No, this HCI only has a 32bit address, but the MASK_64_ADDRESSING_SUPPORT is set... Best regards, Yoshihiro Shimoda > > >Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > >--- > > drivers/scsi/ufs/ufshcd.c | 3 ++- > > drivers/scsi/ufs/ufshcd.h | 6 ++++++ > > 2 files changed, 8 insertions(+), 1 deletion(-) > > > >diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index > >3f9caafa91bf..a7bb3945c7c6 100644 > >--- a/drivers/scsi/ufs/ufshcd.c > >+++ b/drivers/scsi/ufs/ufshcd.c > >@@ -9513,7 +9513,8 @@ EXPORT_SYMBOL_GPL(ufshcd_dealloc_host); > > */ > > static int ufshcd_set_dma_mask(struct ufs_hba *hba) { > >- if (hba->capabilities & MASK_64_ADDRESSING_SUPPORT) { > >+ if (!(hba->quirks & UFSHCD_QUIRK_BROKEN_64BIT_ADDRESS) && > >+ hba->capabilities & MASK_64_ADDRESSING_SUPPORT) { > > if (!dma_set_mask_and_coherent(hba->dev, > >DMA_BIT_MASK(64))) > > return 0; > > } > >diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index > >94f545be183a..1745144eb904 100644 > >--- a/drivers/scsi/ufs/ufshcd.h > >+++ b/drivers/scsi/ufs/ufshcd.h > >@@ -602,6 +602,12 @@ enum ufshcd_quirks { > > * support physical host configuration. > > */ > > UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16, > >+ > >+ /* > >+ * This quirk needs to be enabled if the host controller has > >+ * 64-bit addressing supported capability but it doesn't work. > >+ */ > >+ UFSHCD_QUIRK_BROKEN_64BIT_ADDRESS = 1 << 17, > > }; > > > > enum ufshcd_caps { > >-- > >2.25.1 >
