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Message-ID: <c4bcf9f6-82d7-1e35-64bb-0973ed2ceb4a@linaro.org>
Date: Mon, 28 Feb 2022 09:56:25 -0600
From: Alex Elder <elder@...aro.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
mhi@...ts.linux.dev
Cc: quic_hemantk@...cinc.com, quic_bbhatt@...cinc.com,
quic_jhugo@...cinc.com, vinod.koul@...aro.org,
bjorn.andersson@...aro.org, dmitry.baryshkov@...aro.org,
quic_vbadigan@...cinc.com, quic_cang@...cinc.com,
quic_skananth@...cinc.com, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, Hemant Kumar <hemantk@...eaurora.org>
Subject: Re: [PATCH v4 09/27] bus: mhi: Make mhi_state_str[] array static
inline and move to common.h
On 2/28/22 6:43 AM, Manivannan Sadhasivam wrote:
> mhi_state_str[] array could be used by MHI endpoint stack also. So let's
> make the array as "static inline function" and move it inside the
> "common.h" header so that the endpoint stack could also make use of it.
>
> Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
I guess my grumbling on patch 1 belonged here. I prefer your use
of a switch statement though, and that alleviates my concern.
Reviewed-by: Alex Elder <elder@...aro.org>
> ---
> drivers/bus/mhi/common.h | 29 +++++++++++++++++++++++++----
> drivers/bus/mhi/host/boot.c | 2 +-
> drivers/bus/mhi/host/debugfs.c | 6 +++---
> drivers/bus/mhi/host/init.c | 12 ------------
> drivers/bus/mhi/host/main.c | 8 ++++----
> drivers/bus/mhi/host/pm.c | 14 +++++++-------
> 6 files changed, 40 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/bus/mhi/common.h b/drivers/bus/mhi/common.h
> index f2690bf11c99..ec75ba1e6686 100644
> --- a/drivers/bus/mhi/common.h
> +++ b/drivers/bus/mhi/common.h
> @@ -275,9 +275,30 @@ struct mhi_ring_element {
> __le32 dword[2];
> };
>
> -extern const char * const mhi_state_str[MHI_STATE_MAX];
> -#define TO_MHI_STATE_STR(state) ((state >= MHI_STATE_MAX || \
> - !mhi_state_str[state]) ? \
> - "INVALID_STATE" : mhi_state_str[state])
> +static inline const char * const mhi_state_str(enum mhi_state state)
> +{
> + switch (state) {
> + case MHI_STATE_RESET:
> + return "RESET";
> + case MHI_STATE_READY:
> + return "READY";
> + case MHI_STATE_M0:
> + return "M0";
> + case MHI_STATE_M1:
> + return "M1";
> + case MHI_STATE_M2:
> + return "M2";
> + case MHI_STATE_M3:
> + return "M3";
> + case MHI_STATE_M3_FAST:
> + return "M3 FAST";
> + case MHI_STATE_BHI:
> + return "BHI";
> + case MHI_STATE_SYS_ERR:
> + return "SYS ERROR";
> + default:
> + return "Unknown state";
> + }
> +};
>
> #endif /* _MHI_COMMON_H */
> diff --git a/drivers/bus/mhi/host/boot.c b/drivers/bus/mhi/host/boot.c
> index d5ba3c7efb61..b0da7ca4519c 100644
> --- a/drivers/bus/mhi/host/boot.c
> +++ b/drivers/bus/mhi/host/boot.c
> @@ -67,7 +67,7 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
>
> dev_dbg(dev, "Entered with pm_state:%s dev_state:%s ee:%s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> + mhi_state_str(mhi_cntrl->dev_state),
> TO_MHI_EXEC_STR(mhi_cntrl->ee));
>
> /*
> diff --git a/drivers/bus/mhi/host/debugfs.c b/drivers/bus/mhi/host/debugfs.c
> index bdc875d7bd4d..cfec7811dfbb 100644
> --- a/drivers/bus/mhi/host/debugfs.c
> +++ b/drivers/bus/mhi/host/debugfs.c
> @@ -20,7 +20,7 @@ static int mhi_debugfs_states_show(struct seq_file *m, void *d)
> seq_printf(m, "PM state: %s Device: %s MHI state: %s EE: %s wake: %s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> mhi_is_active(mhi_cntrl) ? "Active" : "Inactive",
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> + mhi_state_str(mhi_cntrl->dev_state),
> TO_MHI_EXEC_STR(mhi_cntrl->ee),
> mhi_cntrl->wake_set ? "true" : "false");
>
> @@ -206,13 +206,13 @@ static int mhi_debugfs_regdump_show(struct seq_file *m, void *d)
>
> seq_printf(m, "Host PM state: %s Device state: %s EE: %s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> + mhi_state_str(mhi_cntrl->dev_state),
> TO_MHI_EXEC_STR(mhi_cntrl->ee));
>
> state = mhi_get_mhi_state(mhi_cntrl);
> ee = mhi_get_exec_env(mhi_cntrl);
> seq_printf(m, "Device EE: %s state: %s\n", TO_MHI_EXEC_STR(ee),
> - TO_MHI_STATE_STR(state));
> + mhi_state_str(state));
>
> for (i = 0; regs[i].name; i++) {
> if (!regs[i].base)
> diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
> index 016dcc35db80..a665b8e92408 100644
> --- a/drivers/bus/mhi/host/init.c
> +++ b/drivers/bus/mhi/host/init.c
> @@ -45,18 +45,6 @@ const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX] = {
> [DEV_ST_TRANSITION_DISABLE] = "DISABLE",
> };
>
> -const char * const mhi_state_str[MHI_STATE_MAX] = {
> - [MHI_STATE_RESET] = "RESET",
> - [MHI_STATE_READY] = "READY",
> - [MHI_STATE_M0] = "M0",
> - [MHI_STATE_M1] = "M1",
> - [MHI_STATE_M2] = "M2",
> - [MHI_STATE_M3] = "M3",
> - [MHI_STATE_M3_FAST] = "M3 FAST",
> - [MHI_STATE_BHI] = "BHI",
> - [MHI_STATE_SYS_ERR] = "SYS ERROR",
> -};
> -
> const char * const mhi_ch_state_type_str[MHI_CH_STATE_TYPE_MAX] = {
> [MHI_CH_STATE_TYPE_RESET] = "RESET",
> [MHI_CH_STATE_TYPE_STOP] = "STOP",
> diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
> index dabf85b92a84..9021be7f2359 100644
> --- a/drivers/bus/mhi/host/main.c
> +++ b/drivers/bus/mhi/host/main.c
> @@ -477,8 +477,8 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv)
> ee = mhi_get_exec_env(mhi_cntrl);
> dev_dbg(dev, "local ee: %s state: %s device ee: %s state: %s\n",
> TO_MHI_EXEC_STR(mhi_cntrl->ee),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> - TO_MHI_EXEC_STR(ee), TO_MHI_STATE_STR(state));
> + mhi_state_str(mhi_cntrl->dev_state),
> + TO_MHI_EXEC_STR(ee), mhi_state_str(state));
>
> if (state == MHI_STATE_SYS_ERR) {
> dev_dbg(dev, "System error detected\n");
> @@ -844,7 +844,7 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
> new_state = MHI_TRE_GET_EV_STATE(local_rp);
>
> dev_dbg(dev, "State change event to state: %s\n",
> - TO_MHI_STATE_STR(new_state));
> + mhi_state_str(new_state));
>
> switch (new_state) {
> case MHI_STATE_M0:
> @@ -871,7 +871,7 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
> }
> default:
> dev_err(dev, "Invalid state: %s\n",
> - TO_MHI_STATE_STR(new_state));
> + mhi_state_str(new_state));
> }
>
> break;
> diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
> index bb8a23e80e19..3d90b8ecd3d9 100644
> --- a/drivers/bus/mhi/host/pm.c
> +++ b/drivers/bus/mhi/host/pm.c
> @@ -541,7 +541,7 @@ static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl)
>
> dev_dbg(dev, "Exiting with PM state: %s, MHI state: %s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state));
> + mhi_state_str(mhi_cntrl->dev_state));
>
> mutex_unlock(&mhi_cntrl->pm_mutex);
> }
> @@ -684,7 +684,7 @@ static void mhi_pm_sys_error_transition(struct mhi_controller *mhi_cntrl)
> exit_sys_error_transition:
> dev_dbg(dev, "Exiting with PM state: %s, MHI state: %s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state));
> + mhi_state_str(mhi_cntrl->dev_state));
>
> mutex_unlock(&mhi_cntrl->pm_mutex);
> }
> @@ -859,7 +859,7 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
> if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
> dev_err(dev,
> "Did not enter M3 state, MHI state: %s, PM state: %s\n",
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> + mhi_state_str(mhi_cntrl->dev_state),
> to_mhi_pm_state_str(mhi_cntrl->pm_state));
> return -EIO;
> }
> @@ -885,7 +885,7 @@ static int __mhi_pm_resume(struct mhi_controller *mhi_cntrl, bool force)
>
> dev_dbg(dev, "Entered with PM state: %s, MHI state: %s\n",
> to_mhi_pm_state_str(mhi_cntrl->pm_state),
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state));
> + mhi_state_str(mhi_cntrl->dev_state));
>
> if (mhi_cntrl->pm_state == MHI_PM_DISABLE)
> return 0;
> @@ -895,7 +895,7 @@ static int __mhi_pm_resume(struct mhi_controller *mhi_cntrl, bool force)
>
> if (mhi_get_mhi_state(mhi_cntrl) != MHI_STATE_M3) {
> dev_warn(dev, "Resuming from non M3 state (%s)\n",
> - TO_MHI_STATE_STR(mhi_get_mhi_state(mhi_cntrl)));
> + mhi_state_str(mhi_get_mhi_state(mhi_cntrl)));
> if (!force)
> return -EINVAL;
> }
> @@ -932,7 +932,7 @@ static int __mhi_pm_resume(struct mhi_controller *mhi_cntrl, bool force)
> if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
> dev_err(dev,
> "Did not enter M0 state, MHI state: %s, PM state: %s\n",
> - TO_MHI_STATE_STR(mhi_cntrl->dev_state),
> + mhi_state_str(mhi_cntrl->dev_state),
> to_mhi_pm_state_str(mhi_cntrl->pm_state));
> return -EIO;
> }
> @@ -1083,7 +1083,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
>
> state = mhi_get_mhi_state(mhi_cntrl);
> dev_dbg(dev, "Attempting power on with EE: %s, state: %s\n",
> - TO_MHI_EXEC_STR(current_ee), TO_MHI_STATE_STR(state));
> + TO_MHI_EXEC_STR(current_ee), mhi_state_str(state));
>
> if (state == MHI_STATE_SYS_ERR) {
> mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
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