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: Prakash Gupta <guptap@codeaurora.org>
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 22c1379..19d21e6 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1100,8 +1100,10 @@
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_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 @@
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,