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Message-Id: <20230901114336.31339-6-quic_nitirawa@quicinc.com>
Date: Fri, 1 Sep 2023 17:13:35 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: mani@...nel.org, agross@...nel.org, andersson@...nel.org,
konrad.dybcio@...aro.org, jejb@...ux.ibm.com,
martin.petersen@...cle.com
Cc: quic_cang@...cinc.com, quic_nguyenb@...cinc.com,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org,
Nitin Rawat <quic_nitirawa@...cinc.com>,
Naveen Kumar Goud Arepalli <quic_narepall@...cinc.com>
Subject: [PATCH V6 5/6] scsi: ufs: qcom: Refactor ufs_qcom_cfg_timers function.
a)Configure SYS1CLK_1US_REG for clock scaleup pre ops.
b)Move ufs_qcom_cfg_timers from clk scaling post change ops
to clk scaling pre change ops to align with the HPG.
c)Introduce a new argument is_pre_scale_up for ufs_qcom_cfg_timers
to configure sys_1us timer for max freq as per HPG.
Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@...cinc.com>
Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@...cinc.com>
Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
---
drivers/ufs/host/ufs-qcom.c | 63 +++++++++++++++++++++++++++----------
1 file changed, 46 insertions(+), 17 deletions(-)
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index d670fcc27ffb..c251c98a74f0 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -532,7 +532,8 @@ static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba,
* Return: zero for success and non-zero in case of a failure.
*/
static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
- u32 hs, u32 rate, bool update_link_startup_timer)
+ u32 hs, u32 rate, bool link_startup,
+ bool is_pre_scale_up)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_clk_info *clki;
@@ -563,11 +564,16 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
/*
* The Qunipro controller does not use following registers:
* SYS1CLK_1US_REG, TX_SYMBOL_CLK_1US_REG, CLK_NS_REG &
- * UFS_REG_PA_LINK_STARTUP_TIMER
- * But UTP controller uses SYS1CLK_1US_REG register for Interrupt
- * Aggregation logic.
- */
- if (ufs_qcom_cap_qunipro(host) && !ufshcd_is_intr_aggr_allowed(hba))
+ * UFS_REG_PA_LINK_STARTUP_TIMER.
+ * However UTP controller uses SYS1CLK_1US_REG register for Interrupt
+ * Aggregation logic and Auto hibern8 logic.
+ * It is mandatory to write SYS1CLK_1US_REG register on UFS host
+ * controller V4.0.0 onwards.
+ */
+ if (ufs_qcom_cap_qunipro(host) &&
+ !(ufshcd_is_intr_aggr_allowed(hba) ||
+ ufshcd_is_auto_hibern8_supported(hba) ||
+ host->hw_ver.major >= 4))
return 0;
if (gear == 0) {
@@ -576,8 +582,14 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
}
list_for_each_entry(clki, &hba->clk_list_head, list) {
- if (!strcmp(clki->name, "core_clk"))
- core_clk_rate = clk_get_rate(clki->clk);
+ if (!strcmp(clki->name, "core_clk")) {
+ if (is_pre_scale_up)
+ core_clk_rate = clki->max_freq;
+ else
+ core_clk_rate = clk_get_rate(clki->clk);
+ break;
+ }
+
}
/* If frequency is smaller than 1MHz, set to 1MHz */
@@ -657,7 +669,7 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
mb();
}
- if (update_link_startup_timer && host->hw_ver.major != 0x5) {
+ if (link_startup && host->hw_ver.major != 0x5) {
ufshcd_writel(hba, ((core_clk_rate / MSEC_PER_SEC) * 100),
REG_UFS_CFG0);
/*
@@ -679,7 +691,7 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
switch (status) {
case PRE_CHANGE:
if (ufs_qcom_cfg_timers(hba, UFS_PWM_G1, SLOWAUTO_MODE,
- 0, true)) {
+ 0, true, false)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n",
__func__);
return -EINVAL;
@@ -927,7 +939,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
case POST_CHANGE:
if (ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
dev_req_params->pwr_rx,
- dev_req_params->hs_rate, false)) {
+ dev_req_params->hs_rate, false, false)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n",
__func__);
/*
@@ -1412,10 +1424,22 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+ struct ufs_pa_layer_attr *attr = &host->dev_req_params;
+ int ret;
if (!ufs_qcom_cap_qunipro(host))
return 0;
+ if (attr) {
+ ret = ufs_qcom_cfg_timers(hba, attr->gear_rx,
+ attr->pwr_rx, attr->hs_rate,
+ false, true);
+ if (ret) {
+ dev_err(hba->dev, "%s ufs cfg timer failed\n",
+ __func__);
+ return ret;
+ }
+ }
return ufs_qcom_set_core_clk_ctrl(hba, true);
}
@@ -1452,10 +1476,21 @@ static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+ struct ufs_pa_layer_attr *attr = &host->dev_req_params;
+ int ret;
if (!ufs_qcom_cap_qunipro(host))
return 0;
+ if (attr) {
+ ret = ufs_qcom_cfg_timers(hba, attr->gear_rx, attr->pwr_rx,
+ attr->hs_rate, false, false);
+ if (ret) {
+ dev_err(hba->dev, "%s ufs cfg timer failed\n",
+ __func__);
+ return ret;
+ }
+ }
return ufs_qcom_set_core_clk_ctrl(hba, false);
}
@@ -1463,7 +1498,6 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
bool scale_up, enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
- struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params;
int err = 0;
/* check the host controller state before sending hibern8 cmd */
@@ -1493,11 +1527,6 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
return err;
}
- ufs_qcom_cfg_timers(hba,
- dev_req_params->gear_rx,
- dev_req_params->pwr_rx,
- dev_req_params->hs_rate,
- false);
ufs_qcom_icc_update_bw(host);
ufshcd_uic_hibern8_exit(hba);
}
--
2.17.1
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