scsi: ufs: add tracing support
This change adds the ftrace support for following: 1. UFS initialization time 2. Clock gating states 3. Clock scaling states 4. Power management APIs latency 5. BKOPs enable/disable Usage: echo 1 > /sys/kernel/debug/tracing/events/ufs/enable cat /sys/kernel/debug/tracing/trace_pipe Reviewed-by: Sahitya Tummala <stummala@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
subhashj@codeaurora.org
Martin K. Petersen
parent
66cc820f9c
commit
7ff5ab4736
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@ -45,6 +45,9 @@
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#include "ufs_quirks.h"
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#include "unipro.h"
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#define CREATE_TRACE_POINTS
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#include <trace/events/ufs.h>
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#define UFSHCD_REQ_SENSE_SIZE 18
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#define UFSHCD_ENABLE_INTRS (UTP_TRANSFER_REQ_COMPL |\
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@ -801,6 +804,8 @@ start:
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case REQ_CLKS_OFF:
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if (cancel_delayed_work(&hba->clk_gating.gate_work)) {
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hba->clk_gating.state = CLKS_ON;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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break;
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}
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/*
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@ -811,6 +816,8 @@ start:
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case CLKS_OFF:
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scsi_block_requests(hba->host);
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hba->clk_gating.state = REQ_CLKS_ON;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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schedule_work(&hba->clk_gating.ungate_work);
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/*
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* fall through to check if we should wait for this
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@ -855,6 +862,8 @@ static void ufshcd_gate_work(struct work_struct *work)
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if (hba->clk_gating.is_suspended ||
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(hba->clk_gating.state == REQ_CLKS_ON)) {
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hba->clk_gating.state = CLKS_ON;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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goto rel_lock;
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}
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@ -870,6 +879,8 @@ static void ufshcd_gate_work(struct work_struct *work)
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if (ufshcd_can_hibern8_during_gating(hba)) {
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if (ufshcd_uic_hibern8_enter(hba)) {
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hba->clk_gating.state = CLKS_ON;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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goto out;
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}
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ufshcd_set_link_hibern8(hba);
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@ -893,9 +904,11 @@ static void ufshcd_gate_work(struct work_struct *work)
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* new requests arriving before the current cancel work is done.
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*/
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spin_lock_irqsave(hba->host->host_lock, flags);
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if (hba->clk_gating.state == REQ_CLKS_OFF)
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if (hba->clk_gating.state == REQ_CLKS_OFF) {
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hba->clk_gating.state = CLKS_OFF;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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}
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rel_lock:
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spin_unlock_irqrestore(hba->host->host_lock, flags);
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out:
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@ -918,6 +931,7 @@ static void __ufshcd_release(struct ufs_hba *hba)
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return;
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hba->clk_gating.state = REQ_CLKS_OFF;
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trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state);
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schedule_delayed_work(&hba->clk_gating.gate_work,
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msecs_to_jiffies(hba->clk_gating.delay_ms));
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}
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@ -3932,6 +3946,7 @@ static int ufshcd_enable_auto_bkops(struct ufs_hba *hba)
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}
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hba->auto_bkops_enabled = true;
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trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Enabled");
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/* No need of URGENT_BKOPS exception from the device */
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err = ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
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@ -3982,6 +3997,7 @@ static int ufshcd_disable_auto_bkops(struct ufs_hba *hba)
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}
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hba->auto_bkops_enabled = false;
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trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Disabled");
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out:
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return err;
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}
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@ -5377,6 +5393,7 @@ static void ufshcd_tune_unipro_params(struct ufs_hba *hba)
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static int ufshcd_probe_hba(struct ufs_hba *hba)
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{
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int ret;
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ktime_t start = ktime_get();
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ret = ufshcd_link_startup(hba);
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if (ret)
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@ -5468,6 +5485,9 @@ out:
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ufshcd_hba_exit(hba);
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}
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trace_ufshcd_init(dev_name(hba->dev), ret,
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ktime_to_us(ktime_sub(ktime_get(), start)),
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hba->uic_link_state, hba->curr_dev_pwr_mode);
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return ret;
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}
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@ -5817,11 +5837,14 @@ out:
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if (!IS_ERR_OR_NULL(clki->clk) && clki->enabled)
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clk_disable_unprepare(clki->clk);
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}
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} else if (on) {
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} else if (!ret && on) {
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spin_lock_irqsave(hba->host->host_lock, flags);
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hba->clk_gating.state = CLKS_ON;
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trace_ufshcd_clk_gating(dev_name(hba->dev),
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hba->clk_gating.state);
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spin_unlock_irqrestore(hba->host->host_lock, flags);
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}
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return ret;
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}
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@ -6304,6 +6327,7 @@ disable_clks:
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__ufshcd_setup_clocks(hba, false, true);
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hba->clk_gating.state = CLKS_OFF;
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trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state);
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/*
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* Disable the host irq as host controller as there won't be any
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* host controller transaction expected till resume.
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@ -6436,6 +6460,7 @@ out:
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int ufshcd_system_suspend(struct ufs_hba *hba)
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{
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int ret = 0;
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ktime_t start = ktime_get();
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if (!hba || !hba->is_powered)
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return 0;
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@ -6462,6 +6487,9 @@ int ufshcd_system_suspend(struct ufs_hba *hba)
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ret = ufshcd_suspend(hba, UFS_SYSTEM_PM);
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out:
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trace_ufshcd_system_suspend(dev_name(hba->dev), ret,
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ktime_to_us(ktime_sub(ktime_get(), start)),
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hba->uic_link_state, hba->curr_dev_pwr_mode);
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if (!ret)
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hba->is_sys_suspended = true;
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return ret;
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@ -6477,6 +6505,9 @@ EXPORT_SYMBOL(ufshcd_system_suspend);
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int ufshcd_system_resume(struct ufs_hba *hba)
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{
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int ret = 0;
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ktime_t start = ktime_get();
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if (!hba)
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return -EINVAL;
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@ -6485,9 +6516,14 @@ int ufshcd_system_resume(struct ufs_hba *hba)
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* Let the runtime resume take care of resuming
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* if runtime suspended.
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*/
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return 0;
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return ufshcd_resume(hba, UFS_SYSTEM_PM);
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goto out;
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else
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ret = ufshcd_resume(hba, UFS_SYSTEM_PM);
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out:
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trace_ufshcd_system_resume(dev_name(hba->dev), ret,
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ktime_to_us(ktime_sub(ktime_get(), start)),
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hba->uic_link_state, hba->curr_dev_pwr_mode);
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return ret;
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}
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EXPORT_SYMBOL(ufshcd_system_resume);
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@ -6501,13 +6537,21 @@ EXPORT_SYMBOL(ufshcd_system_resume);
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*/
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int ufshcd_runtime_suspend(struct ufs_hba *hba)
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{
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int ret = 0;
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ktime_t start = ktime_get();
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if (!hba)
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return -EINVAL;
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if (!hba->is_powered)
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return 0;
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return ufshcd_suspend(hba, UFS_RUNTIME_PM);
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goto out;
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else
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ret = ufshcd_suspend(hba, UFS_RUNTIME_PM);
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out:
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trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret,
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ktime_to_us(ktime_sub(ktime_get(), start)),
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hba->uic_link_state, hba->curr_dev_pwr_mode);
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return ret;
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}
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EXPORT_SYMBOL(ufshcd_runtime_suspend);
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@ -6534,13 +6578,21 @@ EXPORT_SYMBOL(ufshcd_runtime_suspend);
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*/
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int ufshcd_runtime_resume(struct ufs_hba *hba)
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{
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int ret = 0;
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ktime_t start = ktime_get();
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if (!hba)
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return -EINVAL;
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if (!hba->is_powered)
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return 0;
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return ufshcd_resume(hba, UFS_RUNTIME_PM);
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goto out;
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else
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ret = ufshcd_resume(hba, UFS_RUNTIME_PM);
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out:
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trace_ufshcd_runtime_resume(dev_name(hba->dev), ret,
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ktime_to_us(ktime_sub(ktime_get(), start)),
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hba->uic_link_state, hba->curr_dev_pwr_mode);
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return ret;
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}
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EXPORT_SYMBOL(ufshcd_runtime_resume);
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@ -6684,6 +6736,11 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up)
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clki->max_freq, ret);
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break;
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}
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trace_ufshcd_clk_scaling(dev_name(hba->dev),
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"scaled up", clki->name,
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clki->curr_freq,
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clki->max_freq);
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clki->curr_freq = clki->max_freq;
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} else if (!scale_up && clki->min_freq) {
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@ -6696,6 +6753,10 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up)
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clki->min_freq, ret);
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break;
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}
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trace_ufshcd_clk_scaling(dev_name(hba->dev),
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"scaled down", clki->name,
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clki->curr_freq,
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clki->min_freq);
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clki->curr_freq = clki->min_freq;
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}
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}
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@ -0,0 +1,185 @@
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/*
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* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM ufs
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#if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_UFS_H
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#include <linux/tracepoint.h>
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#define UFS_LINK_STATES \
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EM(UIC_LINK_OFF_STATE) \
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EM(UIC_LINK_ACTIVE_STATE) \
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EMe(UIC_LINK_HIBERN8_STATE)
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#define UFS_PWR_MODES \
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EM(UFS_ACTIVE_PWR_MODE) \
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EM(UFS_SLEEP_PWR_MODE) \
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EMe(UFS_POWERDOWN_PWR_MODE)
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#define UFSCHD_CLK_GATING_STATES \
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EM(CLKS_OFF) \
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EM(CLKS_ON) \
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EM(REQ_CLKS_OFF) \
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EMe(REQ_CLKS_ON)
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/* Enums require being exported to userspace, for user tool parsing */
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#undef EM
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#undef EMe
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#define EM(a) TRACE_DEFINE_ENUM(a);
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#define EMe(a) TRACE_DEFINE_ENUM(a);
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UFS_LINK_STATES;
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UFS_PWR_MODES;
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UFSCHD_CLK_GATING_STATES;
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/*
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* Now redefine the EM() and EMe() macros to map the enums to the strings
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* that will be printed in the output.
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*/
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#undef EM
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#undef EMe
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#define EM(a) { a, #a },
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#define EMe(a) { a, #a }
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TRACE_EVENT(ufshcd_clk_gating,
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TP_PROTO(const char *dev_name, int state),
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TP_ARGS(dev_name, state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(int, state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->state = state;
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),
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TP_printk("%s: gating state changed to %s",
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__get_str(dev_name),
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__print_symbolic(__entry->state, UFSCHD_CLK_GATING_STATES))
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);
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TRACE_EVENT(ufshcd_clk_scaling,
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TP_PROTO(const char *dev_name, const char *state, const char *clk,
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u32 prev_state, u32 curr_state),
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TP_ARGS(dev_name, state, clk, prev_state, curr_state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(state, state)
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__string(clk, clk)
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__field(u32, prev_state)
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__field(u32, curr_state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__assign_str(state, state);
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__assign_str(clk, clk);
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__entry->prev_state = prev_state;
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__entry->curr_state = curr_state;
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),
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TP_printk("%s: %s %s from %u to %u Hz",
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__get_str(dev_name), __get_str(state), __get_str(clk),
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__entry->prev_state, __entry->curr_state)
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);
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TRACE_EVENT(ufshcd_auto_bkops_state,
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TP_PROTO(const char *dev_name, const char *state),
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TP_ARGS(dev_name, state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(state, state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__assign_str(state, state);
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),
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TP_printk("%s: auto bkops - %s",
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__get_str(dev_name), __get_str(state))
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);
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DECLARE_EVENT_CLASS(ufshcd_template,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state),
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TP_STRUCT__entry(
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__field(s64, usecs)
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__field(int, err)
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__string(dev_name, dev_name)
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__field(int, dev_state)
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__field(int, link_state)
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),
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TP_fast_assign(
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__entry->usecs = usecs;
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__entry->err = err;
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__assign_str(dev_name, dev_name);
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__entry->dev_state = dev_state;
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__entry->link_state = link_state;
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),
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TP_printk(
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"%s: took %lld usecs, dev_state: %s, link_state: %s, err %d",
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__get_str(dev_name),
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__entry->usecs,
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__print_symbolic(__entry->dev_state, UFS_PWR_MODES),
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__print_symbolic(__entry->link_state, UFS_LINK_STATES),
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__entry->err
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)
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);
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DEFINE_EVENT(ufshcd_template, ufshcd_system_suspend,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_system_resume,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_runtime_suspend,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_runtime_resume,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_init,
|
||||
TP_PROTO(const char *dev_name, int err, s64 usecs,
|
||||
int dev_state, int link_state),
|
||||
TP_ARGS(dev_name, err, usecs, dev_state, link_state));
|
||||
#endif /* if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ) */
|
||||
|
||||
/* This part must be outside protection */
|
||||
#include <trace/define_trace.h>
|
||||
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Reference in New Issue