Commit a54fa079 authored by Kan Liang's avatar Kan Liang Committed by Ingo Molnar
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perf/x86/intel/uncore: Locate specific box by checking full device info 



Some platforms, e.g. Knights Landing, use a common PCI device ID for
multiple instances of an uncore PMU device type. So it is impossible to
locate the specific instances only by PCI device ID.

The current code specially handles Knights Landing by arbitrarily pointing
an instance to an unused uncore box. However, we still have no idea
which uncore device is mapped to which box.

Furthermore, there could be more platforms which use a common PCI device ID
for uncore devices. We have to specially handle them one by one.

This patch records full device information (slot, func, and device ID)
in id_table[]. So the probe function can point the instance to a specific
uncore box by checking the full device information.

Tested-by: default avatarLukasz Odzioba <lukasz.odzioba@intel.com>
Signed-off-by: default avatarKan Liang <kan.liang@intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: default avatar <tglx@linutronix.de>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: bp@suse.de
Cc: harish.chegondi@intel.com
Cc: hubert.chrzaniuk@intel.com
Cc: lawrence.f.meadows@intel.com
Link: http://lkml.kernel.org/r/1463379504-39003-1-git-send-email-kan.liang@intel.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 9c489fce

arch/x86/events/intel/uncore.c

+30 −13
Original line number Diff line number Diff line
@@ -882,7 +882,7 @@ uncore_types_init(struct intel_uncore_type **types, bool setid) 
static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)

{

	struct intel_uncore_type *type;

	struct intel_uncore_pmu *pmu;

	struct intel_uncore_pmu *pmu = NULL;

	struct intel_uncore_box *box;

	int phys_id, pkg, ret;
@@ -903,20 +903,37 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id 
	}



	type = uncore_pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];



	/*

	 * Some platforms, e.g.  Knights Landing, use a common PCI device ID

	 * for multiple instances of an uncore PMU device type. We should check

	 * PCI slot and func to indicate the uncore box.

	 */

	if (id->driver_data & ~0xffff) {

		struct pci_driver *pci_drv = pdev->driver;

		const struct pci_device_id *ids = pci_drv->id_table;

		unsigned int devfn;



		while (ids && ids->vendor) {

			if ((ids->vendor == pdev->vendor) &&

			    (ids->device == pdev->device)) {

				devfn = PCI_DEVFN(UNCORE_PCI_DEV_DEV(ids->driver_data),

						  UNCORE_PCI_DEV_FUNC(ids->driver_data));

				if (devfn == pdev->devfn) {

					pmu = &type->pmus[UNCORE_PCI_DEV_IDX(ids->driver_data)];

					break;

				}

			}

			ids++;

		}

		if (pmu == NULL)

			return -ENODEV;

	} else {

		/*

		 * for performance monitoring unit with multiple boxes,

		 * each box has a different function id.

		 */

		pmu = &type->pmus[UNCORE_PCI_DEV_IDX(id->driver_data)];

	/* Knights Landing uses a common PCI device ID for multiple instances of

	 * an uncore PMU device type. There is only one entry per device type in

	 * the knl_uncore_pci_ids table inspite of multiple devices present for

	 * some device types. Hence PCI device idx would be 0 for all devices.

	 * So increment pmu pointer to point to an unused array element.

	 */

	if (boot_cpu_data.x86_model == 87) {

		while (pmu->func_id >= 0)

			pmu++;

	}



	if (WARN_ON_ONCE(pmu->boxes[pkg] != NULL))

arch/x86/events/intel/uncore.h

+4 −0
Original line number Diff line number Diff line
@@ -15,7 +15,11 @@ 
#define UNCORE_PMC_IDX_FIXED		UNCORE_PMC_IDX_MAX_GENERIC

#define UNCORE_PMC_IDX_MAX		(UNCORE_PMC_IDX_FIXED + 1)



#define UNCORE_PCI_DEV_FULL_DATA(dev, func, type, idx)	\

		((dev << 24) | (func << 16) | (type << 8) | idx)

#define UNCORE_PCI_DEV_DATA(type, idx)	((type << 8) | idx)

#define UNCORE_PCI_DEV_DEV(data)	((data >> 24) & 0xff)

#define UNCORE_PCI_DEV_FUNC(data)	((data >> 16) & 0xff)

#define UNCORE_PCI_DEV_TYPE(data)	((data >> 8) & 0xff)

#define UNCORE_PCI_DEV_IDX(data)	(data & 0xff)

#define UNCORE_EXTRA_PCI_DEV		0xff

arch/x86/events/intel/uncore_snbep.c

+88 −8
Original line number Diff line number Diff line
@@ -2164,21 +2164,101 @@ static struct intel_uncore_type *knl_pci_uncores[] = { 
*/



static const struct pci_device_id knl_uncore_pci_ids[] = {

	{ /* MC UClk */

	{ /* MC0 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7841),

		.driver_data = UNCORE_PCI_DEV_DATA(KNL_PCI_UNCORE_MC_UCLK, 0),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(10, 0, KNL_PCI_UNCORE_MC_UCLK, 0),

	},

	{ /* MC DClk Channel */

	{ /* MC1 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7841),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(11, 0, KNL_PCI_UNCORE_MC_UCLK, 1),

	},

	{ /* MC0 DClk CH 0 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(8, 2, KNL_PCI_UNCORE_MC_DCLK, 0),

	},

	{ /* MC0 DClk CH 1 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(8, 3, KNL_PCI_UNCORE_MC_DCLK, 1),

	},

	{ /* MC0 DClk CH 2 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(8, 4, KNL_PCI_UNCORE_MC_DCLK, 2),

	},

	{ /* MC1 DClk CH 0 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(9, 2, KNL_PCI_UNCORE_MC_DCLK, 3),

	},

	{ /* MC1 DClk CH 1 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_DATA(KNL_PCI_UNCORE_MC_DCLK, 0),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(9, 3, KNL_PCI_UNCORE_MC_DCLK, 4),

	},

	{ /* MC1 DClk CH 2 */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7843),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(9, 4, KNL_PCI_UNCORE_MC_DCLK, 5),

	},

	{ /* EDC0 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(15, 0, KNL_PCI_UNCORE_EDC_UCLK, 0),

	},

	{ /* EDC1 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(16, 0, KNL_PCI_UNCORE_EDC_UCLK, 1),

	},

	{ /* EDC2 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(17, 0, KNL_PCI_UNCORE_EDC_UCLK, 2),

	},

	{ /* EDC3 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(18, 0, KNL_PCI_UNCORE_EDC_UCLK, 3),

	},

	{ /* EDC UClk */

	{ /* EDC4 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_DATA(KNL_PCI_UNCORE_EDC_UCLK, 0),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(19, 0, KNL_PCI_UNCORE_EDC_UCLK, 4),

	},

	{ /* EDC5 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(20, 0, KNL_PCI_UNCORE_EDC_UCLK, 5),

	},

	{ /* EDC6 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(21, 0, KNL_PCI_UNCORE_EDC_UCLK, 6),

	},

	{ /* EDC7 UClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7833),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(22, 0, KNL_PCI_UNCORE_EDC_UCLK, 7),

	},

	{ /* EDC0 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(24, 2, KNL_PCI_UNCORE_EDC_ECLK, 0),

	},

	{ /* EDC1 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(25, 2, KNL_PCI_UNCORE_EDC_ECLK, 1),

	},

	{ /* EDC2 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(26, 2, KNL_PCI_UNCORE_EDC_ECLK, 2),

	},

	{ /* EDC3 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(27, 2, KNL_PCI_UNCORE_EDC_ECLK, 3),

	},

	{ /* EDC4 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(28, 2, KNL_PCI_UNCORE_EDC_ECLK, 4),

	},

	{ /* EDC5 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(29, 2, KNL_PCI_UNCORE_EDC_ECLK, 5),

	},

	{ /* EDC6 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(30, 2, KNL_PCI_UNCORE_EDC_ECLK, 6),

	},

	{ /* EDC EClk */

	{ /* EDC7 EClk */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7835),

		.driver_data = UNCORE_PCI_DEV_DATA(KNL_PCI_UNCORE_EDC_ECLK, 0),

		.driver_data = UNCORE_PCI_DEV_FULL_DATA(31, 2, KNL_PCI_UNCORE_EDC_ECLK, 7),

	},

	{ /* M2PCIe */

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7817),

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