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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 <dave.jiang@intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/a5564a5583911565d31c2af9234218c5166c4b2c.1619276133.git.zanussi@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Tom Zanussi 2021-04-24 10:04:16 -05:00 committed by Vinod Koul
parent 81dd4d4d61
commit 0bde4444ec
2 changed files with 10 additions and 4 deletions
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9
drivers/dma/idxd/init.c
View File

@ -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);

5
drivers/dma/idxd/irq.c
View File

@ -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;