Commit 0bde4444 authored by Tom Zanussi's avatar Tom Zanussi Committed by Vinod Koul
Browse files

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: default avatarDave Jiang <dave.jiang@intel.com>
Reviewed-by: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarTom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/a5564a5583911565d31c2af9234218c5166c4b2c.1619276133.git.zanussi@kernel.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 81dd4d4d

drivers/dma/idxd/init.c

+9 −0
Original line number Diff line number Diff line
@@ -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);

drivers/dma/idxd/irq.c

+1 −4
Original line number Diff line number Diff line
@@ -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;