drivers/hwtracing/intel_th/pci.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Intel(R) Trace Hub pci driver
 *
 * Copyright (C) 2014-2015 Intel Corporation.
 */

#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt

#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/pci.h>

#include "intel_th.h"
#include "pci_ids.h"

#define DRIVER_NAME "intel_th_pci"

enum {
	TH_PCI_CONFIG_BAR	= 0,
	TH_PCI_STH_SW_BAR	= 2,
	TH_PCI_RTIT_BAR		= 4,
};


#define PCI_REG_NPKDSC	0x80
#define NPKDSC_TSACT	BIT(5)

static int intel_th_pci_activate(struct intel_th *th)
{
	struct pci_dev *pdev = to_pci_dev(th->dev);
	u32 npkdsc;
	int err;

	if (!INTEL_TH_CAP(th, tscu_enable))
		return 0;

	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
	if (!err) {
		npkdsc |= NPKDSC_TSACT;
		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
	}

	if (err)
		dev_err(&pdev->dev, "failed to read NPKDSC register\n");

	return err;
}

static void intel_th_pci_deactivate(struct intel_th *th)
{
	struct pci_dev *pdev = to_pci_dev(th->dev);
	u32 npkdsc;
	int err;

	if (!INTEL_TH_CAP(th, tscu_enable))
		return;

	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
	if (!err) {
		npkdsc |= NPKDSC_TSACT;
		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
	}

	if (err)
		dev_err(&pdev->dev, "failed to read NPKDSC register\n");
}

static int intel_th_pci_probe(struct pci_dev *pdev,
			      const struct pci_device_id *id)
{
	const struct intel_th_drvdata *drvdata = (void *)id->driver_data;
	struct resource resource[TH_MMIO_END + TH_NVEC_MAX] = {
		[TH_MMIO_CONFIG]	= pdev->resource[TH_PCI_CONFIG_BAR],
		[TH_MMIO_SW]		= pdev->resource[TH_PCI_STH_SW_BAR],
	};
	int err, r = TH_MMIO_SW + 1, i;
	struct intel_th *th;

	err = pcim_enable_device(pdev);
	if (err)
		return err;

	err = pcim_request_all_regions(pdev, DRIVER_NAME);
	if (err)
		return err;

	if (!pcim_iomap(pdev, TH_PCI_CONFIG_BAR, 0))
		return -ENOMEM;

	if (!pcim_iomap(pdev, TH_PCI_STH_SW_BAR, 0))
		return -ENOMEM;

	if (pdev->resource[TH_PCI_RTIT_BAR].start) {
		resource[TH_MMIO_RTIT] = pdev->resource[TH_PCI_RTIT_BAR];
		r++;
	}

	err = pci_alloc_irq_vectors(pdev, 1, 8, PCI_IRQ_ALL_TYPES);
	if (err > 0)
		for (i = 0; i < err; i++, r++) {
			resource[r].flags = IORESOURCE_IRQ;
			resource[r].start = pci_irq_vector(pdev, i);
		}

	th = intel_th_alloc(&pdev->dev, drvdata, resource, r);
	if (IS_ERR(th)) {
		err = PTR_ERR(th);
		goto err_free_irq;
	}

	th->activate   = intel_th_pci_activate;
	th->deactivate = intel_th_pci_deactivate;

	pci_set_master(pdev);

	return 0;

err_free_irq:
	pci_free_irq_vectors(pdev);
	return err;
}

static void intel_th_pci_remove(struct pci_dev *pdev)
{
	struct intel_th *th = pci_get_drvdata(pdev);

	intel_th_free(th);

	pci_free_irq_vectors(pdev);
}

static const struct intel_th_drvdata intel_th_1x_multi_is_broken = {
	.multi_is_broken	= 1,
};

static const struct intel_th_drvdata intel_th_2x = {
	.tscu_enable	= 1,
	.has_mintctl	= 1,
};

static const struct pci_device_id intel_th_pci_id_table[] = {
	{ PCI_DEVICE_DATA(INTEL, NPK_CML,	&intel_th_2x) },   /* Comet Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_CML_PCH,	&intel_th_2x) },   /* Comet Lake PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_GNR,	&intel_th_2x) },   /* Granite Rapids */
	{ PCI_DEVICE_DATA(INTEL, NPK_BXT,	NULL) },	   /* Broxton */
	{ PCI_DEVICE_DATA(INTEL, NPK_CDF,	&intel_th_2x) },   /* Cedar Fork PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_DNV,	NULL) },	   /* Denverton */
	{ PCI_DEVICE_DATA(INTEL, NPK_BXT_B,	NULL) },	   /* Broxton B-step */
	{ PCI_DEVICE_DATA(INTEL, NPK_EBG,	&intel_th_2x) },   /* Emmitsburg PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_GLK,	&intel_th_2x) },   /* Gemini Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_GNR_SOC,	&intel_th_2x) },   /* Granite Rapids SOC */
	{ PCI_DEVICE_DATA(INTEL, NPK_SPR,	&intel_th_2x) },   /* Sapphire Rapids SOC */
	{ PCI_DEVICE_DATA(INTEL, NPK_ICL_PCH,	&intel_th_2x) },   /* Ice Lake PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_TGL_PCH_H,	&intel_th_2x) },   /* Tiger Lake PCH-H */
	{ PCI_DEVICE_DATA(INTEL, NPK_EHL_CPU,	&intel_th_2x) },   /* Elkhart Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_ICL_NNPI,	&intel_th_2x) },   /* Ice Lake NNPI */
	{ PCI_DEVICE_DATA(INTEL, NPK_ADL_CPU,	&intel_th_2x) },   /* Alder Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_EHL,	&intel_th_2x) },   /* Elkhart Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_RKL,	&intel_th_2x) },   /* Rocket Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_JSL_PCH,	&intel_th_2x) },   /* Jasper Lake PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_JSL_CPU,	&intel_th_2x) },   /* Jasper Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_ADL_P,	&intel_th_2x) },   /* Alder Lake-P */
	{ PCI_DEVICE_DATA(INTEL, NPK_ADL_M,	&intel_th_2x) },   /* Alder Lake-M */
	{ PCI_DEVICE_DATA(INTEL, NPK_APL,	NULL) },	   /* Apollo Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_NVL_PCH,	&intel_th_2x) },   /* Nova Lake-PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_ARL,	&intel_th_2x) },   /* Arrow Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_RPL_S,	&intel_th_2x) },   /* Raptor Lake-S */
	{ PCI_DEVICE_DATA(INTEL, NPK_ADL,	&intel_th_2x) },   /* Alder Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_MTL_P,	&intel_th_2x) },   /* Meteor Lake-P */
	{ PCI_DEVICE_DATA(INTEL, NPK_MTL_S,	&intel_th_2x) },   /* Meteor Lake-S */
	{ PCI_DEVICE_DATA(INTEL, NPK_ICL_CPU,	&intel_th_2x) },   /* Ice Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_TGL_CPU,	&intel_th_2x) },   /* Tiger Lake CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_0,		NULL) },
	{ PCI_DEVICE_DATA(INTEL, NPK_CNL_LP,	&intel_th_2x) },   /* Cannon Lake LP */
	{ PCI_DEVICE_DATA(INTEL, NPK_TGL_PCH,	&intel_th_2x) },   /* Tiger Lake PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_1,		NULL) },
	{ PCI_DEVICE_DATA(INTEL, NPK_LBG_PCH,	NULL) },	   /* Lewisburg PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_LBG_PCH_2,	NULL) },	   /* Lewisburg PCH */
	{ PCI_DEVICE_DATA(INTEL, NPK_KBL_PCH,	&intel_th_1x_multi_is_broken) },   /* Kaby Lake PCH-H */
	{ PCI_DEVICE_DATA(INTEL, NPK_CNL_H,	&intel_th_2x) },   /* Cannon Lake H */
	{ PCI_DEVICE_DATA(INTEL, NPK_CML_PCH_V,	&intel_th_1x_multi_is_broken) },   /* Comet Lake PCH-V */
	{ PCI_DEVICE_DATA(INTEL, NPK_RPL_S_CPU,	&intel_th_2x) },   /* Raptor Lake-S CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_LNL,	&intel_th_2x) },   /* Lunar Lake */
	{ PCI_DEVICE_DATA(INTEL, NPK_MTL_S_CPU,	&intel_th_2x) },   /* Meteor Lake-S CPU */
	{ PCI_DEVICE_DATA(INTEL, NPK_NVL_P,	&intel_th_2x) },   /* Nova Lake-P */
	{ PCI_DEVICE_DATA(INTEL, NPK_NVL_H,	&intel_th_2x) },   /* Nova Lake-H */
	{ PCI_DEVICE_DATA(INTEL, NPK_NVL_S,	&intel_th_2x) },   /* Nova Lake-S */
	{ PCI_DEVICE_DATA(INTEL, NPK_PTL_H,	&intel_th_2x) },   /* Panther Lake-H */
	{ PCI_DEVICE_DATA(INTEL, NPK_PTL_PU,	&intel_th_2x) },   /* Panther Lake-P/U */
	{ }
};

MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);

static struct pci_driver intel_th_pci_driver = {
	.name		= DRIVER_NAME,
	.id_table	= intel_th_pci_id_table,
	.probe		= intel_th_pci_probe,
	.remove		= intel_th_pci_remove,
};

module_pci_driver(intel_th_pci_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");