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Message-ID: <20230415003654.3832806-1-jaegeuk@kernel.org>
Date: Fri, 14 Apr 2023 17:36:54 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
"Martin K . Petersen" <martin.petersen@...cle.com>,
Bart Van Assche <bvanassche@....org>,
Adrian Hunter <adrian.hunter@...el.com>,
Avri Altman <avri.altman@....com>,
Bean Huo <beanhuo@...ron.com>,
Stanley Chu <stanley.chu@...iatek.com>,
Can Guo <cang@...eaurora.org>
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] scsi: ufs: remove ufshcd_hold asynchronously
If ufshcd_hold() returns EAGAIN during queuecommand, scsi will get an error and
resubmit the request along with other commands. This can increase the chance of
reording write IOs, even it's sequential.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
drivers/ufs/core/ufs-sysfs.c | 2 +-
drivers/ufs/core/ufshcd-crypto.c | 2 +-
drivers/ufs/core/ufshcd-priv.h | 2 +-
drivers/ufs/core/ufshcd.c | 63 +++++++++++---------------------
include/ufs/ufshcd.h | 2 +-
5 files changed, 26 insertions(+), 45 deletions(-)
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index 883f0e44b54e..cdf3d5f2b77b 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -168,7 +168,7 @@ static ssize_t auto_hibern8_show(struct device *dev,
}
pm_runtime_get_sync(hba->dev);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER);
ufshcd_release(hba);
pm_runtime_put_sync(hba->dev);
diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c
index 198360fe5e8e..f2c4422cab86 100644
--- a/drivers/ufs/core/ufshcd-crypto.c
+++ b/drivers/ufs/core/ufshcd-crypto.c
@@ -24,7 +24,7 @@ static int ufshcd_program_key(struct ufs_hba *hba,
u32 slot_offset = hba->crypto_cfg_register + slot * sizeof(*cfg);
int err = 0;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
if (hba->vops && hba->vops->program_key) {
err = hba->vops->program_key(hba, cfg, slot);
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index 529f8507a5e4..73c5d98f4387 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -84,7 +84,7 @@ unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
u8 **buf, bool ascii);
-int ufshcd_hold(struct ufs_hba *hba, bool async);
+void ufshcd_hold(struct ufs_hba *hba);
void ufshcd_release(struct ufs_hba *hba);
int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 37e178a9ac47..8ae29cf5be3e 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -1178,7 +1178,7 @@ static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba,
bool timeout = false, do_last_check = false;
ktime_t start;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
spin_lock_irqsave(hba->host->host_lock, flags);
/*
* Wait for all the outstanding tasks/transfer requests.
@@ -1299,7 +1299,7 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba, u64 timeout_us)
}
/* let's not get into low power until clock scaling is completed */
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
out:
return ret;
@@ -1636,7 +1636,7 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev,
goto out;
ufshcd_rpm_get_sync(hba);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
hba->clk_scaling.is_enabled = value;
@@ -1750,17 +1750,15 @@ static void ufshcd_ungate_work(struct work_struct *work)
* ufshcd_hold - Enable clocks that were gated earlier due to ufshcd_release.
* Also, exit from hibern8 mode and set the link as active.
* @hba: per adapter instance
- * @async: This indicates whether caller should ungate clocks asynchronously.
*/
-int ufshcd_hold(struct ufs_hba *hba, bool async)
+void ufshcd_hold(struct ufs_hba *hba)
{
- int rc = 0;
bool flush_result;
unsigned long flags;
if (!ufshcd_is_clkgating_allowed(hba) ||
!hba->clk_gating.is_initialized)
- goto out;
+ return;
spin_lock_irqsave(hba->host->host_lock, flags);
hba->clk_gating.active_reqs++;
@@ -1777,15 +1775,10 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
*/
if (ufshcd_can_hibern8_during_gating(hba) &&
ufshcd_is_link_hibern8(hba)) {
- if (async) {
- rc = -EAGAIN;
- hba->clk_gating.active_reqs--;
- break;
- }
spin_unlock_irqrestore(hba->host->host_lock, flags);
flush_result = flush_work(&hba->clk_gating.ungate_work);
if (hba->clk_gating.is_suspended && !flush_result)
- goto out;
+ return;
spin_lock_irqsave(hba->host->host_lock, flags);
goto start;
}
@@ -1816,12 +1809,6 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
*/
fallthrough;
case REQ_CLKS_ON:
- if (async) {
- rc = -EAGAIN;
- hba->clk_gating.active_reqs--;
- break;
- }
-
spin_unlock_irqrestore(hba->host->host_lock, flags);
flush_work(&hba->clk_gating.ungate_work);
/* Make sure state is CLKS_ON before returning */
@@ -1833,8 +1820,6 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
break;
}
spin_unlock_irqrestore(hba->host->host_lock, flags);
-out:
- return rc;
}
EXPORT_SYMBOL_GPL(ufshcd_hold);
@@ -2066,7 +2051,7 @@ static void ufshcd_exit_clk_gating(struct ufs_hba *hba)
ufshcd_remove_clk_gating_sysfs(hba);
/* Ungate the clock if necessary. */
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
hba->clk_gating.is_initialized = false;
ufshcd_release(hba);
@@ -2461,7 +2446,7 @@ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
return 0;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->uic_cmd_mutex);
ufshcd_add_delay_before_dme_cmd(hba);
@@ -2915,11 +2900,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
hba->req_abort_count = 0;
- err = ufshcd_hold(hba, true);
- if (err) {
- err = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
- }
+ ufshcd_hold(hba);
WARN_ON(ufshcd_is_clkgating_allowed(hba) &&
(hba->clk_gating.state != CLKS_ON));
@@ -3246,7 +3227,7 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
BUG_ON(!hba);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
selector);
@@ -3320,7 +3301,7 @@ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
return -EINVAL;
}
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
@@ -3416,7 +3397,7 @@ static int __ufshcd_query_descriptor(struct ufs_hba *hba,
return -EINVAL;
}
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
@@ -4234,7 +4215,7 @@ int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
uic_cmd.command = UIC_CMD_DME_SET;
uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE);
uic_cmd.argument3 = mode;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
ufshcd_release(hba);
@@ -4341,7 +4322,7 @@ void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit)
if (update &&
!pm_runtime_suspended(&hba->ufs_device_wlun->sdev_gendev)) {
ufshcd_rpm_get_sync(hba);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
ufshcd_auto_hibern8_enable(hba);
ufshcd_release(hba);
ufshcd_rpm_put_sync(hba);
@@ -4934,7 +4915,7 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba)
int err = 0;
int retries;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
for (retries = NOP_OUT_RETRIES; retries > 0; retries--) {
err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_NOP,
@@ -6217,14 +6198,14 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
ufshcd_setup_vreg(hba, true);
ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq);
ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq2);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
if (!ufshcd_is_clkgating_allowed(hba))
ufshcd_setup_clocks(hba, true);
ufshcd_release(hba);
pm_op = hba->is_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
ufshcd_vops_resume(hba, pm_op);
} else {
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
if (ufshcd_is_clkscaling_supported(hba) &&
hba->clk_scaling.is_enabled)
ufshcd_suspend_clkscaling(hba);
@@ -6877,7 +6858,7 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
return PTR_ERR(req);
req->end_io_data = &wait;
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
spin_lock_irqsave(host->host_lock, flags);
@@ -7114,7 +7095,7 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
cmd_type = DEV_CMD_TYPE_NOP;
fallthrough;
case UPIU_TRANSACTION_QUERY_REQ:
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
err = ufshcd_issue_devman_upiu_cmd(hba, req_upiu, rsp_upiu,
desc_buff, buff_len,
@@ -7180,7 +7161,7 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r
u16 ehs_len;
/* Protects use of hba->reserved_slot. */
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
mutex_lock(&hba->dev_cmd.lock);
down_read(&hba->clk_scaling_lock);
@@ -7415,7 +7396,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
WARN_ONCE(tag < 0, "Invalid tag %d\n", tag);
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
/* If command is already aborted/completed, return FAILED. */
if (!(test_bit(tag, &hba->outstanding_reqs))) {
@@ -9396,7 +9377,7 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
* If we can't transition into any of the low power modes
* just gate the clocks.
*/
- ufshcd_hold(hba, false);
+ ufshcd_hold(hba);
hba->clk_gating.is_suspended = true;
if (ufshcd_is_clkscaling_supported(hba))
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 25aab8ec4f86..673729cf5697 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -1364,7 +1364,7 @@ void ufshcd_fixup_dev_quirks(struct ufs_hba *hba,
int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
u8 **buf, bool ascii);
-int ufshcd_hold(struct ufs_hba *hba, bool async);
+void ufshcd_hold(struct ufs_hba *hba);
void ufshcd_release(struct ufs_hba *hba);
void ufshcd_clkgate_delay_set(struct device *dev, unsigned long value);
--
2.40.0.634.g4ca3ef3211-goog
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