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Commit 4ceaef34 authored by Veerabhadrarao Badiganti's avatar Veerabhadrarao Badiganti Committed by Gerrit - the friendly Code Review server
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mmc: add more trace logs and debug information 



Add MMC_TRACE() events in gating and scaling path.
Also, add last successful and failed request timestamps
in struct mmc_host.

Change-Id: I22a138c073624136b858d4fa320aa0ff2d1d2c21
Signed-off-by: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
parent 5f548341

drivers/mmc/card/block.c

+1 −0
Original line number Diff line number Diff line
@@ -3739,6 +3739,7 @@ void mmc_blk_cmdq_complete_rq(struct request *rq) 
	if (err_rwsem && !(err || cmdq_req->resp_err)) {

		mmc_host_clk_release(host);

		wake_up(&ctx_info->wait);

		host->last_completed_rq_time = ktime_get();

		mmc_put_card(host->card);

	}

drivers/mmc/core/core.c

+4 −0
Original line number Diff line number Diff line
@@ -455,12 +455,16 @@ int mmc_clk_update_freq(struct mmc_host *host, 
		goto invalid_state;

	}



	MMC_TRACE(host, "clock scale state %d freq %lu\n",

			state, freq);

	err = host->bus_ops->change_bus_speed(host, &freq);

	if (!err)

		host->clk_scaling.curr_freq = freq;

	else

		pr_err("%s: %s: failed (%d) at freq=%lu\n",

			mmc_hostname(host), __func__, err, freq);

	MMC_TRACE(host, "clock scale state %d freq %lu done with err %d\n",

			state, freq, err);



invalid_state:

	if (cmdq_mode) {

drivers/mmc/core/host.c

+2 −0
Original line number Diff line number Diff line
@@ -155,6 +155,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host) 
		mmc_gate_clock(host);

		spin_lock_irqsave(&host->clk_lock, flags);

		pr_debug("%s: gated MCI clock\n", mmc_hostname(host));

		MMC_TRACE(host, "clocks are gated\n");

	}

	spin_unlock_irqrestore(&host->clk_lock, flags);

	mutex_unlock(&host->clk_gate_mutex);
@@ -193,6 +194,7 @@ void mmc_host_clk_hold(struct mmc_host *host) 


		spin_lock_irqsave(&host->clk_lock, flags);

		pr_debug("%s: ungated MCI clock\n", mmc_hostname(host));

		MMC_TRACE(host, "clocks are ungated\n");

	}

	host->clk_requests++;

	spin_unlock_irqrestore(&host->clk_lock, flags);

drivers/mmc/host/sdhci.c

+1 −0
Original line number Diff line number Diff line
@@ -149,6 +149,7 @@ static void sdhci_dumpregs(struct sdhci_host *host) 
	}



	host->mmc->err_occurred = true;

	host->mmc->last_failed_rq_time = ktime_get();



	if (host->ops->dump_vendor_regs)

		host->ops->dump_vendor_regs(host);

include/linux/mmc/host.h

+2 −0
Original line number Diff line number Diff line
@@ -584,6 +584,8 @@ struct mmc_host { 


	bool			err_occurred;

	u32			err_stats[MMC_ERR_MAX];

	ktime_t			last_failed_rq_time;

	ktime_t			last_completed_rq_time;



	struct mmc_async_req	*areq;		/* active async req */

	struct mmc_context_info	context_info;	/* async synchronization info */