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Message-ID: <b4f9153f9181506a954da1a877dbd3a222982dd0.1678247309.git.quic_nguyenb@quicinc.com>
Date: Tue, 7 Mar 2023 20:01:41 -0800
From: "Bao D. Nguyen" <quic_nguyenb@...cinc.com>
To: <quic_asutoshd@...cinc.com>, <quic_cang@...cinc.com>,
<bvanassche@....org>, <mani@...nel.org>,
<stanley.chu@...iatek.com>, <adrian.hunter@...el.com>,
<beanhuo@...ron.com>, <avri.altman@....com>,
<martin.petersen@...cle.com>
CC: <linux-scsi@...r.kernel.org>,
"Bao D. Nguyen" <quic_nguyenb@...cinc.com>,
Alim Akhtar <alim.akhtar@...sung.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
"Arthur Simchaev" <Arthur.Simchaev@....com>,
open list <linux-kernel@...r.kernel.org>,
"open list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER..."
<linux-arm-msm@...r.kernel.org>
Subject: [RFC PATCH v1 1/4] ufs: mcq: Use ufshcd_mcq_poll_cqe_lock() in mcq mode
In preparation for adding mcq error handler support, update the mcq
code to use the ufshcd_mcq_poll_cqe_lock() in interrupt context
instead of using ufshcd_mcq_poll_cqe_nolock(). This is to keep
synchronization between mcq interrupt and error handler contexts
because both need to access the mcq hardware in separate contexts.
Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
---
drivers/ufs/core/ufs-mcq.c | 6 +++---
drivers/ufs/core/ufshcd-priv.h | 2 --
drivers/ufs/core/ufshcd.c | 2 +-
drivers/ufs/host/ufs-qcom.c | 2 +-
include/ufs/ufshcd.h | 2 +-
5 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 31df052..63729dd 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -277,8 +277,8 @@ static void ufshcd_mcq_process_cqe(struct ufs_hba *hba,
ufshcd_compl_one_cqe(hba, tag, cqe);
}
-unsigned long ufshcd_mcq_poll_cqe_nolock(struct ufs_hba *hba,
- struct ufs_hw_queue *hwq)
+static unsigned long ufshcd_mcq_poll_cqe_nolock(struct ufs_hba *hba,
+ struct ufs_hw_queue *hwq)
{
unsigned long completed_reqs = 0;
@@ -294,7 +294,6 @@ unsigned long ufshcd_mcq_poll_cqe_nolock(struct ufs_hba *hba,
return completed_reqs;
}
-EXPORT_SYMBOL_GPL(ufshcd_mcq_poll_cqe_nolock);
unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
struct ufs_hw_queue *hwq)
@@ -307,6 +306,7 @@ unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
return completed_reqs;
}
+EXPORT_SYMBOL_GPL(ufshcd_mcq_poll_cqe_lock);
void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba)
{
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index 529f850..9597e955 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -71,8 +71,6 @@ void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds);
void ufshcd_mcq_select_mcq_mode(struct ufs_hba *hba);
u32 ufshcd_mcq_read_cqis(struct ufs_hba *hba, int i);
void ufshcd_mcq_write_cqis(struct ufs_hba *hba, u32 val, int i);
-unsigned long ufshcd_mcq_poll_cqe_nolock(struct ufs_hba *hba,
- struct ufs_hw_queue *hwq);
struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba,
struct request *req);
unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 629442c..e4d1b4e 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -6739,7 +6739,7 @@ static irqreturn_t ufshcd_handle_mcq_cq_events(struct ufs_hba *hba)
ufshcd_mcq_write_cqis(hba, events, i);
if (events & UFSHCD_MCQ_CQIS_TAIL_ENT_PUSH_STS)
- ufshcd_mcq_poll_cqe_nolock(hba, hwq);
+ ufshcd_mcq_poll_cqe_lock(hba, hwq);
}
return IRQ_HANDLED;
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 34fc453..c686fb8 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1558,7 +1558,7 @@ static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *__hba)
struct ufs_hw_queue *hwq = &hba->uhq[id];
ufshcd_mcq_write_cqis(hba, 0x1, id);
- ufshcd_mcq_poll_cqe_nolock(hba, hwq);
+ ufshcd_mcq_poll_cqe_lock(hba, hwq);
return IRQ_HANDLED;
}
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 05e4164..5d7f9b2 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -1244,7 +1244,7 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val);
void ufshcd_hba_stop(struct ufs_hba *hba);
void ufshcd_schedule_eh_work(struct ufs_hba *hba);
void ufshcd_mcq_write_cqis(struct ufs_hba *hba, u32 val, int i);
-unsigned long ufshcd_mcq_poll_cqe_nolock(struct ufs_hba *hba,
+unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
struct ufs_hw_queue *hwq);
void ufshcd_mcq_enable_esi(struct ufs_hba *hba);
void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg);
--
2.7.4
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