From: Alim Akhtar <alim.akhtar@samsung.com>
To: robh@kernel.org
Cc: devicetree@vger.kernel.org, linux-scsi@vger.kernel.org,
krzk@kernel.org, avri.altman@wdc.com, martin.petersen@oracle.com,
kwmad.kim@samsung.com, stanley.chu@mediatek.com,
cang@codeaurora.org, linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Alim Akhtar <alim.akhtar@samsung.com>
Subject: [PATCH v10 04/10] scsi: ufs: introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk
Date: Thu, 28 May 2020 06:46:52 +0530 [thread overview]
Message-ID: <20200528011658.71590-5-alim.akhtar@samsung.com> (raw)
In-Reply-To: <20200528011658.71590-1-alim.akhtar@samsung.com>
Some UFS host controllers like Exynos uses granularities of PRDT length and
offset as bytes, whereas others uses actual segment count.
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>
---
drivers/scsi/ufs/ufshcd.c | 30 +++++++++++++++++++++++-------
drivers/scsi/ufs/ufshcd.h | 6 ++++++
2 files changed, 29 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ee30ed6cc805..ba093d0d0942 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2151,8 +2151,14 @@ 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;
@@ -3500,11 +3506,21 @@ 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);
}
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index f8d08cb9caf7..a9b9ace9fc72 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -535,6 +535,12 @@ enum ufshcd_quirks {
* enabled via HCE register.
*/
UFSHCI_QUIRK_BROKEN_HCE = 1 << 8,
+
+ /*
+ * This quirk needs to be enabled if the host controller regards
+ * resolution of the values of PRDTO and PRDTL in UTRD as byte.
+ */
+ UFSHCD_QUIRK_PRDT_BYTE_GRAN = 1 << 9,
};
enum ufshcd_caps {
--
2.17.1
next prev parent reply other threads:[~2020-05-28 1:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200528013223epcas5p2be85fa8803326b49a905fb7225992cad@epcas5p2.samsung.com>
2020-05-28 1:16 ` [PATCH v10 00/10] exynos-ufs: Add support for UFS HCI Alim Akhtar
[not found] ` <CGME20200528013226epcas5p1c73527c71424679443c10daf8bf561df@epcas5p1.samsung.com>
2020-05-28 1:16 ` [PATCH v10 01/10] scsi: ufs: add quirk to fix mishandling utrlclr/utmrlclr Alim Akhtar
[not found] ` <CGME20200528013228epcas5p4641c271e319aaefc78d7bbd22b23c30f@epcas5p4.samsung.com>
2020-05-28 1:16 ` [PATCH v10 02/10] scsi: ufs: add quirk to disallow reset of interrupt aggregation Alim Akhtar
[not found] ` <CGME20200528013230epcas5p37b2d1980cfccf593242bef11e2076eb8@epcas5p3.samsung.com>
2020-05-28 1:16 ` [PATCH v10 03/10] scsi: ufs: add quirk to enable host controller without hce Alim Akhtar
[not found] ` <CGME20200528013232epcas5p32fecbbebc06909ff1fa7136481891dc1@epcas5p3.samsung.com>
2020-05-28 1:16 ` Alim Akhtar [this message]
[not found] ` <CGME20200528013234epcas5p2fe5412e2775ff9b28a1b29e8e30ab69c@epcas5p2.samsung.com>
2020-05-28 1:16 ` [PATCH v10 05/10] scsi: ufs: add quirk to fix abnormal ocs fatal error Alim Akhtar
[not found] ` <CGME20200528013236epcas5p3cc936778eabd07450fbb7f03a17fe757@epcas5p3.samsung.com>
2020-05-28 1:16 ` [PATCH v10 06/10] dt-bindings: phy: Document Samsung UFS PHY bindings Alim Akhtar
[not found] ` <CGME20200528013238epcas5p3c00d834dbb0b26cc683f293385d77178@epcas5p3.samsung.com>
2020-05-28 1:16 ` [PATCH v10 07/10] phy: samsung-ufs: add UFS PHY driver for samsung SoC Alim Akhtar
[not found] ` <CGME20200528013240epcas5p38d53c6e320065b40bda434c49efad57a@epcas5p3.samsung.com>
2020-05-28 1:16 ` [PATCH v10 08/10] dt-bindings: ufs: Add bindings for Samsung ufs host Alim Akhtar
[not found] ` <CGME20200528013243epcas5p460a041d543b9acfbaa923f38709740b0@epcas5p4.samsung.com>
2020-05-28 1:16 ` [PATCH v10 09/10] scsi: ufs-exynos: add UFS host support for Exynos SoCs Alim Akhtar
[not found] ` <CGME20200528013245epcas5p37851891649512882c7b1ffb5f903c506@epcas5p3.samsung.com>
2020-05-28 1:16 ` [PATCH v10 10/10] arm64: dts: Add node for ufs exynos7 Alim Akhtar
2020-05-29 8:05 ` Krzysztof Kozlowski
2020-06-01 1:30 ` Alim Akhtar
2020-06-01 1:40 ` [PATCH v10 00/10] exynos-ufs: Add support for UFS HCI Alim Akhtar
2020-06-03 2:31 ` Martin K. Petersen
2020-06-08 2:45 ` Alim Akhtar
2020-06-08 2:52 ` Kishon Vijay Abraham I
2020-06-11 15:18 ` Alim Akhtar
2020-06-20 1:59 ` Alim Akhtar
2020-06-24 10:21 ` Vinod Koul
2020-06-24 16:57 ` Alim Akhtar
2020-06-24 17:30 ` Vinod Koul
2020-06-25 0:21 ` Alim Akhtar
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