Merge "scsi: ufs: Add states to debug abnormal clocks turn off" (8e3cba5f) · Commits · e / devices / android_kernel_sony_msm8998

drivers/scsi/ufs/ufshcd.c

+21 −2

Original line number	Diff line number	Diff line
		@@ -1506,6 +1506,7 @@ start:
		}
		spin_unlock_irqrestore(hba->host->host_lock, flags);
		out:
		hba->ufs_stats.clk_hold.ts = ktime_get();
		return rc;
		}
		EXPORT_SYMBOL_GPL(ufshcd_hold);
		@@ -1610,6 +1611,7 @@ static void __ufshcd_release(struct ufs_hba *hba, bool no_sched)

		hba->clk_gating.state = REQ_CLKS_OFF;
		trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state);
		hba->ufs_stats.clk_rel.ts = ktime_get();

		hrtimer_start(&hba->clk_gating.gate_hrtimer,
		ms_to_ktime(hba->clk_gating.delay_ms),
		@@ -2056,8 +2058,10 @@ static void ufshcd_hibern8_exit_work(struct work_struct *work)

		/* Exit from hibern8 */
		if (ufshcd_is_link_hibern8(hba)) {
		hba->ufs_stats.clk_hold.ctx = H8_EXIT_WORK;
		ufshcd_hold(hba, false);
		ret = ufshcd_uic_hibern8_exit(hba);
		hba->ufs_stats.clk_rel.ctx = H8_EXIT_WORK;
		ufshcd_release(hba, false);
		if (!ret) {
		spin_lock_irqsave(hba->host->host_lock, flags);
		@@ -2483,6 +2487,7 @@ ufshcd_send_uic_cmd(struct ufs_hba hba, struct uic_command uic_cmd)
		int ret;
		unsigned long flags;

		hba->ufs_stats.clk_hold.ctx = UIC_CMD_SEND;
		ufshcd_hold_all(hba);
		mutex_lock(&hba->uic_cmd_mutex);
		ufshcd_add_delay_before_dme_cmd(hba);
		@@ -2496,6 +2501,7 @@ ufshcd_send_uic_cmd(struct ufs_hba hba, struct uic_command uic_cmd)
		ufshcd_save_tstamp_of_last_dme_cmd(hba);
		mutex_unlock(&hba->uic_cmd_mutex);
		ufshcd_release_all(hba);
		hba->ufs_stats.clk_rel.ctx = UIC_CMD_SEND;

		ufsdbg_error_inject_dispatcher(hba,
		ERR_INJECT_UIC, 0, &ret);
		@@ -2973,6 +2979,7 @@ static int ufshcd_queuecommand(struct Scsi_Host host, struct scsi_cmnd cmd)
		goto out;
		}

		hba->ufs_stats.clk_hold.ctx = QUEUE_CMD;
		err = ufshcd_hold(hba, true);
		if (err) {
		err = SCSI_MLQUEUE_HOST_BUSY;
		@@ -2986,6 +2993,7 @@ static int ufshcd_queuecommand(struct Scsi_Host host, struct scsi_cmnd cmd)
		if (err) {
		clear_bit_unlock(tag, &hba->lrb_in_use);
		err = SCSI_MLQUEUE_HOST_BUSY;
		hba->ufs_stats.clk_rel.ctx = QUEUE_CMD;
		ufshcd_release(hba, true);
		goto out;
		}
		@@ -4357,8 +4365,10 @@ static 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;
		hba->ufs_stats.clk_hold.ctx = PWRCTL_CMD_SEND;
		ufshcd_hold_all(hba);
		ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
		hba->ufs_stats.clk_rel.ctx = PWRCTL_CMD_SEND;
		ufshcd_release_all(hba);
		out:
		return ret;
		@@ -5526,6 +5536,7 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
		update_req_stats(hba, lrbp);
		/* Mark completed command as NULL in LRB */
		lrbp->cmd = NULL;
		hba->ufs_stats.clk_rel.ctx = XFR_REQ_COMPL;
		__ufshcd_release(hba, false);
		__ufshcd_hibern8_release(hba, false);
		if (cmd->request) {
		@@ -6048,6 +6059,7 @@ static void ufshcd_err_handler(struct work_struct *work)
		if (unlikely((hba->clk_gating.state != CLKS_ON) &&
		ufshcd_is_auto_hibern8_supported(hba))) {
		spin_unlock_irqrestore(hba->host->host_lock, flags);
		hba->ufs_stats.clk_hold.ctx = ERR_HNDLR_WORK;
		ufshcd_hold(hba, false);
		spin_lock_irqsave(hba->host->host_lock, flags);
		clks_enabled = true;
		@@ -6191,8 +6203,10 @@ skip_err_handling:

		hba->silence_err_logs = false;

		if (clks_enabled)
		if (clks_enabled) {
		__ufshcd_release(hba, false);
		hba->ufs_stats.clk_rel.ctx = ERR_HNDLR_WORK;
		}
		out:
		ufshcd_clear_eh_in_progress(hba);
		spin_unlock_irqrestore(hba->host->host_lock, flags);
		@@ -6428,7 +6442,8 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)

		spin_lock(hba->host->host_lock);
		intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);

		hba->ufs_stats.last_intr_status = intr_status;
		hba->ufs_stats.last_intr_ts = ktime_get();
		/*
		* There could be max of hba->nutrs reqs in flight and in worst case
		* if the reqs get finished 1 by 1 after the interrupt status is
		@@ -6507,6 +6522,7 @@ static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id,
		* the maximum wait time is bounded by %TM_CMD_TIMEOUT.
		*/
		wait_event(hba->tm_tag_wq, ufshcd_get_tm_free_slot(hba, &free_slot));
		hba->ufs_stats.clk_hold.ctx = TM_CMD_SEND;
		ufshcd_hold_all(hba);

		spin_lock_irqsave(host->host_lock, flags);
		@@ -6564,6 +6580,7 @@ static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id,
		clear_bit(free_slot, &hba->tm_condition);
		ufshcd_put_tm_slot(hba, free_slot);
		wake_up(&hba->tm_tag_wq);
		hba->ufs_stats.clk_rel.ctx = TM_CMD_SEND;

		ufshcd_release_all(hba);
		return err;
		@@ -9458,6 +9475,7 @@ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up)
		int ret = 0;

		/* let's not get into low power until clock scaling is completed */
		hba->ufs_stats.clk_hold.ctx = CLK_SCALE_WORK;
		ufshcd_hold_all(hba);

		ret = ufshcd_clock_scaling_prepare(hba);
		@@ -9521,6 +9539,7 @@ scale_up_gear:
		clk_scaling_unprepare:
		ufshcd_clock_scaling_unprepare(hba);
		out:
		hba->ufs_stats.clk_rel.ctx = CLK_SCALE_WORK;
		ufshcd_release_all(hba);
		return ret;
		}

drivers/scsi/ufs/ufshcd.h

+21 −1

Original line number	Diff line number	Diff line
		@@ -3,7 +3,7 @@
		*
		* This code is based on drivers/scsi/ufs/ufshcd.h
		* Copyright (C) 2011-2013 Samsung India Software Operations
		* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
		* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.
		*
		* Authors:
		* Santosh Yaraganavi <santosh.sy@samsung.com>
		@@ -588,6 +588,22 @@ struct ufshcd_req_stat {
		};
		#endif

		enum ufshcd_ctx {
		QUEUE_CMD,
		ERR_HNDLR_WORK,
		H8_EXIT_WORK,
		UIC_CMD_SEND,
		PWRCTL_CMD_SEND,
		TM_CMD_SEND,
		XFR_REQ_COMPL,
		CLK_SCALE_WORK,
		};

		struct ufshcd_clk_ctx {
		ktime_t ts;
		enum ufshcd_ctx ctx;
		};

		/**
		* struct ufs_stats - keeps usage/err statistics
		* @enabled: enable tag stats for debugfs
		@@ -616,6 +632,10 @@ struct ufs_stats {
		int query_stats_arr[UPIU_QUERY_OPCODE_MAX][MAX_QUERY_IDN];

		#endif
		u32 last_intr_status;
		ktime_t last_intr_ts;
		struct ufshcd_clk_ctx clk_hold;
		struct ufshcd_clk_ctx clk_rel;
		u32 hibern8_exit_cnt;
		ktime_t last_hibern8_exit_tstamp;
		struct ufs_uic_err_reg_hist pa_err;