diff options
| author | Alim Akhtar <alim.akhtar@samsung.com> | 2020-05-28 06:46:52 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-06-15 14:04:09 -0400 |
| commit | 26f968d7de823ba4974a8f25c8bd8ee2df6ab74b (patch) | |
| tree | 8174c78623a0fa0461ca3802079553f3b95f3cc3 /drivers/scsi/ufs/ufshcd.c | |
| parent | 39bf2d83b54e900675cd7b52737ded695bb60bf1 (diff) | |
scsi: ufs: Introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk
Some UFS host controllers like Exynos uses granularities of PRDT length and
offset as bytes, whereas others use actual segment count.
Link: https://lore.kernel.org/r/20200528011658.71590-5-alim.akhtar@samsung.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.c')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 411d9a43282d..52206d5c2ca2 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2168,8 +2168,14 @@ static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) return sg_segments; if (sg_segments) { - lrbp->utr_descriptor_ptr->prd_table_length = - cpu_to_le16((u16)sg_segments); + + if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) + lrbp->utr_descriptor_ptr->prd_table_length = + cpu_to_le16((sg_segments * + sizeof(struct ufshcd_sg_entry))); + else + lrbp->utr_descriptor_ptr->prd_table_length = + cpu_to_le16((u16) (sg_segments)); prd_table = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr; @@ -3518,11 +3524,21 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba) cpu_to_le32(upper_32_bits(cmd_desc_element_addr)); /* Response upiu and prdt offset should be in double words */ - utrdlp[i].response_upiu_offset = - cpu_to_le16(response_offset >> 2); - utrdlp[i].prd_table_offset = cpu_to_le16(prdt_offset >> 2); - utrdlp[i].response_upiu_length = - cpu_to_le16(ALIGNED_UPIU_SIZE >> 2); + if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) { + utrdlp[i].response_upiu_offset = + cpu_to_le16(response_offset); + utrdlp[i].prd_table_offset = + cpu_to_le16(prdt_offset); + utrdlp[i].response_upiu_length = + cpu_to_le16(ALIGNED_UPIU_SIZE); + } else { + utrdlp[i].response_upiu_offset = + cpu_to_le16(response_offset >> 2); + utrdlp[i].prd_table_offset = + cpu_to_le16(prdt_offset >> 2); + utrdlp[i].response_upiu_length = + cpu_to_le16(ALIGNED_UPIU_SIZE >> 2); + } ufshcd_init_lrb(hba, &hba->lrb[i], i); } |