1 files changed, 0 insertions, 172 deletions
diff --git a/drivers/iommu/intel/perfmon.c b/drivers/iommu/intel/perfmon.c
deleted file mode 100644
index db5791a544551..0000000000000
--- a/drivers/iommu/intel/perfmon.c
+++ /dev/null
@@ -1,172 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Support Intel IOMMU PerfMon
- * Copyright(c) 2023 Intel Corporation.
- */
-#define pr_fmt(fmt)	"DMAR: " fmt
-#define dev_fmt(fmt)	pr_fmt(fmt)
-
-#include <linux/dmar.h>
-#include "iommu.h"
-#include "perfmon.h"
-
-static inline void __iomem *
-get_perf_reg_address(struct intel_iommu *iommu, u32 offset)
-{
-	u32 off = dmar_readl(iommu->reg + offset);
-
-	return iommu->reg + off;
-}
-
-int alloc_iommu_pmu(struct intel_iommu *iommu)
-{
-	struct iommu_pmu *iommu_pmu;
-	int i, j, ret;
-	u64 perfcap;
-	u32 cap;
-
-	if (!ecap_pms(iommu->ecap))
-		return 0;
-
-	/* The IOMMU PMU requires the ECMD support as well */
-	if (!cap_ecmds(iommu->cap))
-		return -ENODEV;
-
-	perfcap = dmar_readq(iommu->reg + DMAR_PERFCAP_REG);
-	/* The performance monitoring is not supported. */
-	if (!perfcap)
-		return -ENODEV;
-
-	/* Sanity check for the number of the counters and event groups */
-	if (!pcap_num_cntr(perfcap) || !pcap_num_event_group(perfcap))
-		return -ENODEV;
-
-	/* The interrupt on overflow is required */
-	if (!pcap_interrupt(perfcap))
-		return -ENODEV;
-
-	iommu_pmu = kzalloc(sizeof(*iommu_pmu), GFP_KERNEL);
-	if (!iommu_pmu)
-		return -ENOMEM;
-
-	iommu_pmu->num_cntr = pcap_num_cntr(perfcap);
-	iommu_pmu->cntr_width = pcap_cntr_width(perfcap);
-	iommu_pmu->filter = pcap_filters_mask(perfcap);
-	iommu_pmu->cntr_stride = pcap_cntr_stride(perfcap);
-	iommu_pmu->num_eg = pcap_num_event_group(perfcap);
-
-	iommu_pmu->evcap = kcalloc(iommu_pmu->num_eg, sizeof(u64), GFP_KERNEL);
-	if (!iommu_pmu->evcap) {
-		ret = -ENOMEM;
-		goto free_pmu;
-	}
-
-	/* Parse event group capabilities */
-	for (i = 0; i < iommu_pmu->num_eg; i++) {
-		u64 pcap;
-
-		pcap = dmar_readq(iommu->reg + DMAR_PERFEVNTCAP_REG +
-				  i * IOMMU_PMU_CAP_REGS_STEP);
-		iommu_pmu->evcap[i] = pecap_es(pcap);
-	}
-
-	iommu_pmu->cntr_evcap = kcalloc(iommu_pmu->num_cntr, sizeof(u32 *), GFP_KERNEL);
-	if (!iommu_pmu->cntr_evcap) {
-		ret = -ENOMEM;
-		goto free_pmu_evcap;
-	}
-	for (i = 0; i < iommu_pmu->num_cntr; i++) {
-		iommu_pmu->cntr_evcap[i] = kcalloc(iommu_pmu->num_eg, sizeof(u32), GFP_KERNEL);
-		if (!iommu_pmu->cntr_evcap[i]) {
-			ret = -ENOMEM;
-			goto free_pmu_cntr_evcap;
-		}
-		/*
-		 * Set to the global capabilities, will adjust according
-		 * to per-counter capabilities later.
-		 */
-		for (j = 0; j < iommu_pmu->num_eg; j++)
-			iommu_pmu->cntr_evcap[i][j] = (u32)iommu_pmu->evcap[j];
-	}
-
-	iommu_pmu->cfg_reg = get_perf_reg_address(iommu, DMAR_PERFCFGOFF_REG);
-	iommu_pmu->cntr_reg = get_perf_reg_address(iommu, DMAR_PERFCNTROFF_REG);
-	iommu_pmu->overflow = get_perf_reg_address(iommu, DMAR_PERFOVFOFF_REG);
-
-	/*
-	 * Check per-counter capabilities. All counters should have the
-	 * same capabilities on Interrupt on Overflow Support and Counter
-	 * Width.
-	 */
-	for (i = 0; i < iommu_pmu->num_cntr; i++) {
-		cap = dmar_readl(iommu_pmu->cfg_reg +
-				 i * IOMMU_PMU_CFG_OFFSET +
-				 IOMMU_PMU_CFG_CNTRCAP_OFFSET);
-		if (!iommu_cntrcap_pcc(cap))
-			continue;
-
-		/*
-		 * It's possible that some counters have a different
-		 * capability because of e.g., HW bug. Check the corner
-		 * case here and simply drop those counters.
-		 */
-		if ((iommu_cntrcap_cw(cap) != iommu_pmu->cntr_width) ||
-		    !iommu_cntrcap_ios(cap)) {
-			iommu_pmu->num_cntr = i;
-			pr_warn("PMU counter capability inconsistent, counter number reduced to %d\n",
-				iommu_pmu->num_cntr);
-		}
-
-		/* Clear the pre-defined events group */
-		for (j = 0; j < iommu_pmu->num_eg; j++)
-			iommu_pmu->cntr_evcap[i][j] = 0;
-
-		/* Override with per-counter event capabilities */
-		for (j = 0; j < iommu_cntrcap_egcnt(cap); j++) {
-			cap = dmar_readl(iommu_pmu->cfg_reg + i * IOMMU_PMU_CFG_OFFSET +
-					 IOMMU_PMU_CFG_CNTREVCAP_OFFSET +
-					 (j * IOMMU_PMU_OFF_REGS_STEP));
-			iommu_pmu->cntr_evcap[i][iommu_event_group(cap)] = iommu_event_select(cap);
-			/*
-			 * Some events may only be supported by a specific counter.
-			 * Track them in the evcap as well.
-			 */
-			iommu_pmu->evcap[iommu_event_group(cap)] |= iommu_event_select(cap);
-		}
-	}
-
-	iommu_pmu->iommu = iommu;
-	iommu->pmu = iommu_pmu;
-
-	return 0;
-
-free_pmu_cntr_evcap:
-	for (i = 0; i < iommu_pmu->num_cntr; i++)
-		kfree(iommu_pmu->cntr_evcap[i]);
-	kfree(iommu_pmu->cntr_evcap);
-free_pmu_evcap:
-	kfree(iommu_pmu->evcap);
-free_pmu:
-	kfree(iommu_pmu);
-
-	return ret;
-}
-
-void free_iommu_pmu(struct intel_iommu *iommu)
-{
-	struct iommu_pmu *iommu_pmu = iommu->pmu;
-
-	if (!iommu_pmu)
-		return;
-
-	if (iommu_pmu->evcap) {
-		int i;
-
-		for (i = 0; i < iommu_pmu->num_cntr; i++)
-			kfree(iommu_pmu->cntr_evcap[i]);
-		kfree(iommu_pmu->cntr_evcap);
-	}
-	kfree(iommu_pmu->evcap);
-	kfree(iommu_pmu);
-	iommu->pmu = NULL;
-}