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Commit 515d9bc3 authored by Prakash Gupta's avatar Prakash Gupta
Browse files

iommu: arm-smmu: add tlbi traces 



Add traces for tlbi start, tlbi end and tlbsync timeout.

To enable the TLBI ftrace:
echo 1 > /d/tracing/events/iommu/tlbi_start/enable
echo 1 > /d/tracing/events/iommu/tlbi_end/enable
echo 1 > /d/tracing/events/iommu/tlbsync_timeout/enable

Change-Id: I72541e4de02ba195b31d84759efe6e07f522b5b0
Signed-off-by: default avatarPrakash Gupta <guptap@codeaurora.org>
parent 25f90511

drivers/iommu/arm-smmu.c

+9 −1
Original line number Diff line number Diff line
@@ -1100,9 +1100,11 @@ static void arm_smmu_tlb_sync_cb(struct arm_smmu_device *smmu, 
	writel_relaxed(0, base + ARM_SMMU_CB_TLBSYNC);

	if (readl_poll_timeout_atomic(base + ARM_SMMU_CB_TLBSTATUS, val,

				      !(val & TLBSTATUS_SACTIVE),

				      0, TLB_LOOP_TIMEOUT))

				      0, TLB_LOOP_TIMEOUT)) {

		trace_tlbsync_timeout(smmu->dev, 0);

		dev_err(smmu->dev, "TLBSYNC timeout!\n");

	}

}



static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu)

{
@@ -1132,11 +1134,15 @@ static void arm_smmu_tlb_sync(void *cookie) 
static void arm_smmu_tlb_inv_context(void *cookie)

{

	struct arm_smmu_domain *smmu_domain = cookie;

	struct device *dev = smmu_domain->dev;

	struct arm_smmu_cfg *cfg = &smmu_domain->cfg;

	struct arm_smmu_device *smmu = smmu_domain->smmu;

	bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS;

	void __iomem *base;

	bool use_tlbiall = smmu->options & ARM_SMMU_OPT_NO_ASID_RETENTION;

	ktime_t cur = ktime_get();



	trace_tlbi_start(dev, 0);



	if (stage1 && !use_tlbiall) {

		base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
@@ -1153,6 +1159,8 @@ static void arm_smmu_tlb_inv_context(void *cookie) 
			       base + ARM_SMMU_GR0_TLBIVMID);

		__arm_smmu_tlb_sync(smmu);

	}



	trace_tlbi_end(dev, ktime_us_delta(ktime_get(), cur));

}



static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size,