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Commit 2b0b16d3 authored by Alexander Shishkin's avatar Alexander Shishkin Committed by Greg Kroah-Hartman
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intel_th: Add pci glue layer for Intel(R) Trace Hub 



This patch adds basic support for PCI-based Intel TH devices. It requests
2 bars (configuration registers for the subdevices and STH channel MMIO
region) and calls into Intel TH core code to create the bus with subdevices
etc.

Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 39f40346

drivers/hwtracing/intel_th/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -15,6 +15,15 @@ config INTEL_TH 


if INTEL_TH



config INTEL_TH_PCI

	tristate "Intel(R) Trace Hub PCI controller"

	depends on PCI

	help

	  Intel(R) Trace Hub may exist as a PCI device. This option enables

	  support glue layer for PCI-based Intel TH.



	  Say Y here to enable PCI Intel TH support.



config INTEL_TH_DEBUG

	bool "Intel(R) Trace Hub debugging"

	depends on DEBUG_FS

drivers/hwtracing/intel_th/Makefile

+3 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_INTEL_TH)		+= intel_th.o

intel_th-y			:= core.o

intel_th-$(CONFIG_INTEL_TH_DEBUG) += debug.o



obj-$(CONFIG_INTEL_TH_PCI)	+= intel_th_pci.o

intel_th_pci-y			:= pci.o

drivers/hwtracing/intel_th/pci.c

0 → 100644
+86 −0
Original line number Diff line number Diff line 
/*

 * Intel(R) Trace Hub pci driver

 *

 * Copyright (C) 2014-2015 Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 */



#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"



#define DRIVER_NAME "intel_th_pci"



#define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))



static int intel_th_pci_probe(struct pci_dev *pdev,

			      const struct pci_device_id *id)

{

	struct intel_th *th;

	int err;



	err = pcim_enable_device(pdev);

	if (err)

		return err;



	err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);

	if (err)

		return err;



	th = intel_th_alloc(&pdev->dev, pdev->resource,

			    DEVICE_COUNT_RESOURCE, pdev->irq);

	if (IS_ERR(th))

		return PTR_ERR(th);



	pci_set_drvdata(pdev, th);



	return 0;

}



static void intel_th_pci_remove(struct pci_dev *pdev)

{

	struct intel_th *th = pci_get_drvdata(pdev);



	intel_th_free(th);

}



static const struct pci_device_id intel_th_pci_id_table[] = {

	{

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),

		.driver_data = (kernel_ulong_t)0,

	},

	{

		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),

		.driver_data = (kernel_ulong_t)0,

	},

	{ 0 },

};



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>");