dmaengine: idxd: Enable IDXD performance monitor support

Add the code needed in the main IDXD driver to interface with the IDXD perfmon implementation. [ Based on work originally by Jing Lin. ] Reviewed-by: Dave Jiang <[email protected]> Reviewed-by: Kan Liang <[email protected]> Signed-off-by: Tom Zanussi <[email protected]> Link: https://lore.kernel.org/r/a5564a5583911565d31c2af9234218c5166c4b2c.1619276133.git.zanussi@kernel.org Signed-off-by: Vinod Koul <[email protected]>
ddstreet · Apr 25, 2021 · 0bde444 · 0bde444
1 parent 81dd4d4
commit 0bde444
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Showing 2 changed files with 10 additions and 4 deletions.
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
@@ -21,6 +21,7 @@
 #include "../dmaengine.h"
 #include "registers.h"
 #include "idxd.h"
+#include "perfmon.h"
 
 MODULE_VERSION(IDXD_DRIVER_VERSION);
 MODULE_LICENSE("GPL v2");
@@ -541,6 +542,10 @@ static int idxd_probe(struct idxd_device *idxd)
 
 	idxd->major = idxd_cdev_get_major(idxd);
 
+	rc = perfmon_pmu_init(idxd);
+	if (rc < 0)
+		dev_warn(dev, "Failed to initialize perfmon. No PMU support: %d\n", rc);
+
 	dev_dbg(dev, "IDXD device %d probed successfully\n", idxd->id);
 	return 0;
 
@@ -720,6 +725,7 @@ static void idxd_remove(struct pci_dev *pdev)
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
 	idxd_unregister_devices(idxd);
+	perfmon_pmu_remove(idxd);
 	iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
 }
 
@@ -749,6 +755,8 @@ static int __init idxd_init_module(void)
 	else
 		support_enqcmd = true;
 
+	perfmon_init();
+
 	err = idxd_register_bus_type();
 	if (err < 0)
 		return err;
@@ -782,5 +790,6 @@ static void __exit idxd_exit_module(void)
 	pci_unregister_driver(&idxd_pci_driver);
 	idxd_cdev_remove();
 	idxd_unregister_bus_type();
+	perfmon_exit();
 }
 module_exit(idxd_exit_module);
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
@@ -156,11 +156,8 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 	}
 
 	if (cause & IDXD_INTC_PERFMON_OVFL) {
-		/*
-		 * Driver does not utilize perfmon counter overflow interrupt
-		 * yet.
-		 */
 		val |= IDXD_INTC_PERFMON_OVFL;
+		perfmon_counter_overflow(idxd);
 	}
 
 	val ^= cause;