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Message-ID: <d614a89f-0c46-7920-7d09-3db15498bf86@quicinc.com>
Date: Tue, 28 Nov 2023 11:01:00 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: Can Guo <quic_cang@...cinc.com>, <bvanassche@....org>,
<mani@...nel.org>, <adrian.hunter@...el.com>, <beanhuo@...ron.com>,
<avri.altman@....com>, <junwoo80.lee@...sung.com>,
<martin.petersen@...cle.com>
CC: <linux-scsi@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Stanley Chu <stanley.chu@...iatek.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
"Matthias Brugger" <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Andrew Halaney <ahalaney@...hat.com>,
Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
Brian Masney <bmasney@...hat.com>,
"moderated list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES"
<linux-arm-kernel@...ts.infradead.org>,
"open list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES"
<linux-samsung-soc@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
"moderated list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER..."
<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v5 01/10] scsi: ufs: host: Rename structure ufs_dev_params
to ufs_host_params
On 11/23/2023 2:16 PM, Can Guo wrote:
> Structure ufs_dev_params is actually used in UFS host vendor drivers to
> declare host specific power mode parameters, like ufs_<vendor>_params or
> host_cap, which makes the code not very straightforward to read. Rename the
> structure ufs_dev_params to ufs_host_params and unify the declarations in
> all vendor drivers to host_params.
>
> In addition, rename the two functions ufshcd_init_pwr_dev_param() and
> ufshcd_get_pwr_dev_param() which work based on the ufs_host_params to
> ufshcd_init_host_param() and ufshcd_negotiate_pwr_param() respectively to
> avoid confusions.
>
> This change does not change any functionalities or logic.
>
> Acked-by: Andrew Halaney <ahalaney@...hat.com>
> Signed-off-by: Can Guo <quic_cang@...cinc.com>
> ---
> drivers/ufs/host/ufs-exynos.c | 7 ++--
> drivers/ufs/host/ufs-hisi.c | 11 +++----
> drivers/ufs/host/ufs-mediatek.c | 12 +++----
> drivers/ufs/host/ufs-qcom.c | 12 +++----
> drivers/ufs/host/ufshcd-pltfrm.c | 69 ++++++++++++++++++++--------------------
> drivers/ufs/host/ufshcd-pltfrm.h | 10 +++---
> 6 files changed, 57 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
> index 71bd6db..674f2f4 100644
> --- a/drivers/ufs/host/ufs-exynos.c
> +++ b/drivers/ufs/host/ufs-exynos.c
> @@ -765,7 +765,7 @@ static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba,
> {
> struct exynos_ufs *ufs = ufshcd_get_variant(hba);
> struct phy *generic_phy = ufs->phy;
> - struct ufs_dev_params ufs_exynos_cap;
> + struct ufs_host_params host_params;
> int ret;
>
> if (!dev_req_params) {
> @@ -774,10 +774,9 @@ static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba,
> goto out;
> }
>
> - ufshcd_init_pwr_dev_param(&ufs_exynos_cap);
> + ufshcd_init_host_param(&host_params);
>
> - ret = ufshcd_get_pwr_dev_param(&ufs_exynos_cap,
> - dev_max_params, dev_req_params);
> + ret = ufshcd_negotiate_pwr_param(&host_params, dev_max_params, dev_req_params);
> if (ret) {
> pr_err("%s: failed to determine capabilities\n", __func__);
> goto out;
> diff --git a/drivers/ufs/host/ufs-hisi.c b/drivers/ufs/host/ufs-hisi.c
> index 0229ac0..bb0c9a7 100644
> --- a/drivers/ufs/host/ufs-hisi.c
> +++ b/drivers/ufs/host/ufs-hisi.c
> @@ -293,9 +293,9 @@ static int ufs_hisi_link_startup_notify(struct ufs_hba *hba,
> return err;
> }
>
> -static void ufs_hisi_set_dev_cap(struct ufs_dev_params *hisi_param)
> +static void ufs_hisi_set_dev_cap(struct ufs_host_params *host_params)
> {
> - ufshcd_init_pwr_dev_param(hisi_param);
> + ufshcd_init_host_param(host_params);
> }
>
> static void ufs_hisi_pwr_change_pre_change(struct ufs_hba *hba)
> @@ -365,7 +365,7 @@ static int ufs_hisi_pwr_change_notify(struct ufs_hba *hba,
> struct ufs_pa_layer_attr *dev_max_params,
> struct ufs_pa_layer_attr *dev_req_params)
> {
> - struct ufs_dev_params ufs_hisi_cap;
> + struct ufs_host_params host_params;
> int ret = 0;
>
> if (!dev_req_params) {
> @@ -377,9 +377,8 @@ static int ufs_hisi_pwr_change_notify(struct ufs_hba *hba,
>
> switch (status) {
> case PRE_CHANGE:
> - ufs_hisi_set_dev_cap(&ufs_hisi_cap);
> - ret = ufshcd_get_pwr_dev_param(&ufs_hisi_cap,
> - dev_max_params, dev_req_params);
> + ufs_hisi_set_dev_cap(&host_params);
> + ret = ufshcd_negotiate_pwr_param(&host_params, dev_max_params, dev_req_params);
> if (ret) {
> dev_err(hba->dev,
> "%s: failed to determine capabilities\n", __func__);
> diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
> index fc61790..016067d 100644
> --- a/drivers/ufs/host/ufs-mediatek.c
> +++ b/drivers/ufs/host/ufs-mediatek.c
> @@ -996,16 +996,14 @@ static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
> struct ufs_pa_layer_attr *dev_req_params)
> {
> struct ufs_mtk_host *host = ufshcd_get_variant(hba);
> - struct ufs_dev_params host_cap;
> + struct ufs_host_params host_params;
> int ret;
>
> - ufshcd_init_pwr_dev_param(&host_cap);
> - host_cap.hs_rx_gear = UFS_HS_G5;
> - host_cap.hs_tx_gear = UFS_HS_G5;
> + ufshcd_init_host_param(&host_params);
> + host_params.hs_rx_gear = UFS_HS_G5;
> + host_params.hs_tx_gear = UFS_HS_G5;
>
> - ret = ufshcd_get_pwr_dev_param(&host_cap,
> - dev_max_params,
> - dev_req_params);
> + ret = ufshcd_negotiate_pwr_param(&host_params, dev_max_params, dev_req_params);
> if (ret) {
> pr_info("%s: failed to determine capabilities\n",
> __func__);
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 96cb8b5..aee66a3 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -898,7 +898,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
> struct ufs_pa_layer_attr *dev_req_params)
> {
> struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> - struct ufs_dev_params ufs_qcom_cap;
> + struct ufs_host_params host_params;
> int ret = 0;
>
> if (!dev_req_params) {
> @@ -908,15 +908,13 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
>
> switch (status) {
> case PRE_CHANGE:
> - ufshcd_init_pwr_dev_param(&ufs_qcom_cap);
> - ufs_qcom_cap.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
> + ufshcd_init_host_param(&host_params);
> + host_params.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
>
> /* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */
> - ufs_qcom_cap.hs_tx_gear = ufs_qcom_cap.hs_rx_gear = ufs_qcom_get_hs_gear(hba);
> + host_params.hs_tx_gear = host_params.hs_rx_gear = ufs_qcom_get_hs_gear(hba);
>
> - ret = ufshcd_get_pwr_dev_param(&ufs_qcom_cap,
> - dev_max_params,
> - dev_req_params);
> + ret = ufshcd_negotiate_pwr_param(&host_params, dev_max_params, dev_req_params);
> if (ret) {
> dev_err(hba->dev, "%s: failed to determine capabilities\n",
> __func__);
> diff --git a/drivers/ufs/host/ufshcd-pltfrm.c b/drivers/ufs/host/ufshcd-pltfrm.c
> index da2558e..9ec11b9 100644
> --- a/drivers/ufs/host/ufshcd-pltfrm.c
> +++ b/drivers/ufs/host/ufshcd-pltfrm.c
> @@ -285,61 +285,60 @@ static int ufshcd_parse_operating_points(struct ufs_hba *hba)
> }
>
> /**
> - * ufshcd_get_pwr_dev_param - get finally agreed attributes for
> - * power mode change
> - * @pltfrm_param: pointer to platform parameters
> + * ufshcd_negotiate_pwr_param - find power mode settings that are supported by
> + both the controller and the device
> + * @host_param: pointer to host parameters
> * @dev_max: pointer to device attributes
> * @agreed_pwr: returned agreed attributes
> *
> * Return: 0 on success, non-zero value on failure.
> */
> -int ufshcd_get_pwr_dev_param(const struct ufs_dev_params *pltfrm_param,
> - const struct ufs_pa_layer_attr *dev_max,
> - struct ufs_pa_layer_attr *agreed_pwr)
> +int ufshcd_negotiate_pwr_param(const struct ufs_host_params *host_param,
> + const struct ufs_pa_layer_attr *dev_max,
> + struct ufs_pa_layer_attr *agreed_pwr)
> {
> - int min_pltfrm_gear;
> + int min_host_gear;
> int min_dev_gear;
> bool is_dev_sup_hs = false;
> - bool is_pltfrm_max_hs = false;
> + bool is_host_max_hs = false;
>
> if (dev_max->pwr_rx == FAST_MODE)
> is_dev_sup_hs = true;
>
> - if (pltfrm_param->desired_working_mode == UFS_HS_MODE) {
> - is_pltfrm_max_hs = true;
> - min_pltfrm_gear = min_t(u32, pltfrm_param->hs_rx_gear,
> - pltfrm_param->hs_tx_gear);
> + if (host_param->desired_working_mode == UFS_HS_MODE) {
> + is_host_max_hs = true;
> + min_host_gear = min_t(u32, host_param->hs_rx_gear,
> + host_param->hs_tx_gear);
> } else {
> - min_pltfrm_gear = min_t(u32, pltfrm_param->pwm_rx_gear,
> - pltfrm_param->pwm_tx_gear);
> + min_host_gear = min_t(u32, host_param->pwm_rx_gear,
> + host_param->pwm_tx_gear);
> }
>
> /*
> - * device doesn't support HS but
> - * pltfrm_param->desired_working_mode is HS,
> - * thus device and pltfrm_param don't agree
> + * device doesn't support HS but host_param->desired_working_mode is HS,
> + * thus device and host_param don't agree
> */
> - if (!is_dev_sup_hs && is_pltfrm_max_hs) {
> + if (!is_dev_sup_hs && is_host_max_hs) {
> pr_info("%s: device doesn't support HS\n",
> __func__);
> return -ENOTSUPP;
> - } else if (is_dev_sup_hs && is_pltfrm_max_hs) {
> + } else if (is_dev_sup_hs && is_host_max_hs) {
> /*
> * since device supports HS, it supports FAST_MODE.
> - * since pltfrm_param->desired_working_mode is also HS
> + * since host_param->desired_working_mode is also HS
> * then final decision (FAST/FASTAUTO) is done according
> * to pltfrm_params as it is the restricting factor
> */
> - agreed_pwr->pwr_rx = pltfrm_param->rx_pwr_hs;
> + agreed_pwr->pwr_rx = host_param->rx_pwr_hs;
> agreed_pwr->pwr_tx = agreed_pwr->pwr_rx;
> } else {
> /*
> - * here pltfrm_param->desired_working_mode is PWM.
> + * here host_param->desired_working_mode is PWM.
> * it doesn't matter whether device supports HS or PWM,
> - * in both cases pltfrm_param->desired_working_mode will
> + * in both cases host_param->desired_working_mode will
> * determine the mode
> */
> - agreed_pwr->pwr_rx = pltfrm_param->rx_pwr_pwm;
> + agreed_pwr->pwr_rx = host_param->rx_pwr_pwm;
> agreed_pwr->pwr_tx = agreed_pwr->pwr_rx;
> }
>
> @@ -349,9 +348,9 @@ int ufshcd_get_pwr_dev_param(const struct ufs_dev_params *pltfrm_param,
> * the same decision will be made for rx
> */
> agreed_pwr->lane_tx = min_t(u32, dev_max->lane_tx,
> - pltfrm_param->tx_lanes);
> + host_param->tx_lanes);
> agreed_pwr->lane_rx = min_t(u32, dev_max->lane_rx,
> - pltfrm_param->rx_lanes);
> + host_param->rx_lanes);
>
> /* device maximum gear is the minimum between device rx and tx gears */
> min_dev_gear = min_t(u32, dev_max->gear_rx, dev_max->gear_tx);
> @@ -364,26 +363,26 @@ int ufshcd_get_pwr_dev_param(const struct ufs_dev_params *pltfrm_param,
> * what is the gear, as it is the one that also decided previously what
> * pwr the device will be configured to.
> */
> - if ((is_dev_sup_hs && is_pltfrm_max_hs) ||
> - (!is_dev_sup_hs && !is_pltfrm_max_hs)) {
> + if ((is_dev_sup_hs && is_host_max_hs) ||
> + (!is_dev_sup_hs && !is_host_max_hs)) {
> agreed_pwr->gear_rx =
> - min_t(u32, min_dev_gear, min_pltfrm_gear);
> + min_t(u32, min_dev_gear, min_host_gear);
> } else if (!is_dev_sup_hs) {
> agreed_pwr->gear_rx = min_dev_gear;
> } else {
> - agreed_pwr->gear_rx = min_pltfrm_gear;
> + agreed_pwr->gear_rx = min_host_gear;
> }
> agreed_pwr->gear_tx = agreed_pwr->gear_rx;
>
> - agreed_pwr->hs_rate = pltfrm_param->hs_rate;
> + agreed_pwr->hs_rate = host_param->hs_rate;
>
> return 0;
> }
> -EXPORT_SYMBOL_GPL(ufshcd_get_pwr_dev_param);
> +EXPORT_SYMBOL_GPL(ufshcd_negotiate_pwr_param);
>
> -void ufshcd_init_pwr_dev_param(struct ufs_dev_params *dev_param)
> +void ufshcd_init_host_param(struct ufs_host_params *host_param)
> {
> - *dev_param = (struct ufs_dev_params){
> + *host_param = (struct ufs_host_params){
> .tx_lanes = UFS_LANE_2,
> .rx_lanes = UFS_LANE_2,
> .hs_rx_gear = UFS_HS_G3,
> @@ -398,7 +397,7 @@ void ufshcd_init_pwr_dev_param(struct ufs_dev_params *dev_param)
> .desired_working_mode = UFS_HS_MODE,
> };
> }
> -EXPORT_SYMBOL_GPL(ufshcd_init_pwr_dev_param);
> +EXPORT_SYMBOL_GPL(ufshcd_init_host_param);
>
> /**
> * ufshcd_pltfrm_init - probe routine of the driver
> diff --git a/drivers/ufs/host/ufshcd-pltfrm.h b/drivers/ufs/host/ufshcd-pltfrm.h
> index a86a3ad..2d4d047 100644
> --- a/drivers/ufs/host/ufshcd-pltfrm.h
> +++ b/drivers/ufs/host/ufshcd-pltfrm.h
> @@ -10,7 +10,7 @@
> #define UFS_PWM_MODE 1
> #define UFS_HS_MODE 2
>
> -struct ufs_dev_params {
> +struct ufs_host_params {
> u32 pwm_rx_gear; /* pwm rx gear to work in */
> u32 pwm_tx_gear; /* pwm tx gear to work in */
> u32 hs_rx_gear; /* hs rx gear to work in */
> @@ -25,10 +25,10 @@ struct ufs_dev_params {
> u32 desired_working_mode;
> };
>
> -int ufshcd_get_pwr_dev_param(const struct ufs_dev_params *dev_param,
> - const struct ufs_pa_layer_attr *dev_max,
> - struct ufs_pa_layer_attr *agreed_pwr);
> -void ufshcd_init_pwr_dev_param(struct ufs_dev_params *dev_param);
> +int ufshcd_negotiate_pwr_param(const struct ufs_host_params *host_param,
> + const struct ufs_pa_layer_attr *dev_max,
> + struct ufs_pa_layer_attr *agreed_pwr);
> +void ufshcd_init_host_param(struct ufs_host_params *host_param);
> int ufshcd_pltfrm_init(struct platform_device *pdev,
> const struct ufs_hba_variant_ops *vops);
> int ufshcd_populate_vreg(struct device *dev, const char *name,
Reviewed-by: Nitin Rawat <quic_nitirawa@...cinc.com>
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