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Wed, 25 Sep 2024 16:56:20 +0000 (UTC) Received: from [100.66.154.22] (unknown [104.135.204.82]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 009.lax.mailroute.net (Postfix) with ESMTPSA id 4XDNCz56jPzlgTWK; Wed, 25 Sep 2024 16:56:15 +0000 (UTC) Message-ID: <03b34628-d70b-4ce6-ad87-3c2070105bfa@acm.org> Date: Wed, 25 Sep 2024 09:56:13 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 3/3] ufs: core: add a quirk for MediaTek SDB mode aborted To: peter.wang@mediatek.com, linux-scsi@vger.kernel.org, martin.petersen@oracle.com, avri.altman@wdc.com, alim.akhtar@samsung.com, jejb@linux.ibm.com Cc: wsd_upstream@mediatek.com, linux-mediatek@lists.infradead.org, chun-hung.wu@mediatek.com, alice.chao@mediatek.com, cc.chou@mediatek.com, chaotian.jing@mediatek.com, jiajie.hao@mediatek.com, powen.kao@mediatek.com, qilin.tan@mediatek.com, lin.gui@mediatek.com, tun-yu.yu@mediatek.com, eddie.huang@mediatek.com, naomi.chu@mediatek.com, ed.tsai@mediatek.com, quic_nguyenb@quicinc.com References: <20240925095546.19492-1-peter.wang@mediatek.com> <20240925095546.19492-4-peter.wang@mediatek.com> Content-Language: en-US From: Bart Van Assche In-Reply-To: <20240925095546.19492-4-peter.wang@mediatek.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240925_095630_887327_80733B7A X-CRM114-Status: GOOD ( 19.78 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 9/25/24 2:55 AM, peter.wang@mediatek.com wrote: > From: Peter Wang > > Because the MediaTek UFS controller uses UTRLCLR to clear commands > and fills the OCS with ABORTED, this patch introduces a quirk to > treat ABORTED as INVALID_OCS_VALUE. > > Signed-off-by: Peter Wang > --- > drivers/ufs/core/ufshcd.c | 5 ++++- > drivers/ufs/host/ufs-mediatek.c | 1 + > include/ufs/ufshcd.h | 6 ++++++ > 3 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c > index 4fff929b70d6..d429817fca94 100644 > --- a/drivers/ufs/core/ufshcd.c > +++ b/drivers/ufs/core/ufshcd.c > @@ -5404,7 +5404,10 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, > } > break; > case OCS_ABORTED: > - result |= DID_ABORT << 16; > + if (hba->quirks & UFSHCD_QUIRK_OCS_ABORTED) > + result |= DID_REQUEUE << 16; > + else > + result |= DID_ABORT << 16; > dev_warn(hba->dev, > "OCS aborted from controller for tag %d\n", > lrbp->task_tag); > diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c > index 02c9064284e1..8a4c1b8f5a26 100644 > --- a/drivers/ufs/host/ufs-mediatek.c > +++ b/drivers/ufs/host/ufs-mediatek.c > @@ -1021,6 +1021,7 @@ static int ufs_mtk_init(struct ufs_hba *hba) > hba->quirks |= UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL; > hba->quirks |= UFSHCD_QUIRK_MCQ_BROKEN_INTR; > hba->quirks |= UFSHCD_QUIRK_MCQ_BROKEN_RTC; > + hba->quirks |= UFSHCD_QUIRK_OCS_ABORTED; > hba->vps->wb_flush_threshold = UFS_WB_BUF_REMAIN_PERCENT(80); > > if (host->caps & UFS_MTK_CAP_DISABLE_AH8) > diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h > index 0fd2aebac728..8f156803d703 100644 > --- a/include/ufs/ufshcd.h > +++ b/include/ufs/ufshcd.h > @@ -684,6 +684,12 @@ enum ufshcd_quirks { > * single doorbell mode. > */ > UFSHCD_QUIRK_BROKEN_LSDBS_CAP = 1 << 25, > + > + /* > + * Some host controllers set OCS_ABORTED after UTRLCLR (SDB mode), > + * this quirk is set to treat OCS: ABORTED as INVALID_OCS_VALUE > + */ > + UFSHCD_QUIRK_OCS_ABORTED = 1 << 26, > }; > > enum ufshcd_caps { ufshcd_transfer_rsp_status() only has one caller, namely ufshcd_compl_one_cqe(). The previous patch makes sure that that ufshcd_compl_one_cqe() is not called if a SCSI command is aborted. So why does this patch modify how OCS_ABORTED is processed? Is this patch necessary or can it perhaps be dropped? Thanks, Bart.