}
/*
+ * Interrupt handler has processed all pending events and adjusted head
+ * and tail pointer. Reset overflow mask and restart logging again.
+ */
+static void amd_iommu_restart_log(struct amd_iommu *iommu, const char *evt_type,
+ u8 cntrl_intr, u8 cntrl_log,
+ u32 status_run_mask, u32 status_overflow_mask)
+{
+ u32 status;
+
+ status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
+ if (status & status_run_mask)
+ return;
+
+ pr_info_ratelimited("IOMMU %s log restarting\n", evt_type);
+
+ iommu_feature_disable(iommu, cntrl_log);
+ iommu_feature_disable(iommu, cntrl_intr);
+
+ writel(status_overflow_mask, iommu->mmio_base + MMIO_STATUS_OFFSET);
+
+ iommu_feature_enable(iommu, cntrl_intr);
+ iommu_feature_enable(iommu, cntrl_log);
+}
+
+/*
* This function restarts event logging in case the IOMMU experienced
* an event log buffer overflow.
*/
void amd_iommu_restart_event_logging(struct amd_iommu *iommu)
{
- iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
- iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
+ amd_iommu_restart_log(iommu, "Event", CONTROL_EVT_INT_EN,
+ CONTROL_EVT_LOG_EN, MMIO_STATUS_EVT_RUN_MASK,
+ MMIO_STATUS_EVT_OVERFLOW_MASK);
}
/*
* This function restarts event logging in case the IOMMU experienced
- * an GA log overflow.
+ * GA log overflow.
*/
void amd_iommu_restart_ga_log(struct amd_iommu *iommu)
{
- u32 status;
-
- status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
- if (status & MMIO_STATUS_GALOG_RUN_MASK)
- return;
-
- pr_info_ratelimited("IOMMU GA Log restarting\n");
-
- iommu_feature_disable(iommu, CONTROL_GALOG_EN);
- iommu_feature_disable(iommu, CONTROL_GAINT_EN);
-
- writel(MMIO_STATUS_GALOG_OVERFLOW_MASK,
- iommu->mmio_base + MMIO_STATUS_OFFSET);
-
- iommu_feature_enable(iommu, CONTROL_GAINT_EN);
- iommu_feature_enable(iommu, CONTROL_GALOG_EN);
+ amd_iommu_restart_log(iommu, "GA", CONTROL_GAINT_EN,
+ CONTROL_GALOG_EN, MMIO_STATUS_GALOG_RUN_MASK,
+ MMIO_STATUS_GALOG_OVERFLOW_MASK);
}
/*
#endif /* !CONFIG_IRQ_REMAP */
#define AMD_IOMMU_INT_MASK \
- (MMIO_STATUS_EVT_OVERFLOW_INT_MASK | \
+ (MMIO_STATUS_EVT_OVERFLOW_MASK | \
MMIO_STATUS_EVT_INT_MASK | \
MMIO_STATUS_PPR_INT_MASK | \
MMIO_STATUS_GALOG_OVERFLOW_MASK | \
}
#endif
- if (status & MMIO_STATUS_EVT_OVERFLOW_INT_MASK) {
+ if (status & MMIO_STATUS_EVT_OVERFLOW_MASK) {
pr_info_ratelimited("IOMMU event log overflow\n");
amd_iommu_restart_event_logging(iommu);
}