Commit 2b0b16d3 authored by Alexander Shishkin's avatar Alexander Shishkin Committed by Greg Kroah-Hartman

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
......@@ -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
......
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
/*
* 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>");
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