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authorAlexander Shishkin <alexander.shishkin@linux.intel.com>2015-09-22 15:47:15 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-04 20:28:58 +0100
commit2b0b16d329add49d503ff08b45d7636731f493dc (patch)
treed82574fcbae6d3fc609b154211d35ecdde75aa93 /drivers/hwtracing/intel_th/pci.c
parent39f4034693b7c7bd1fe4cb58c93259d600f55561 (diff)
downloadlinux-2b0b16d329add49d503ff08b45d7636731f493dc.tar.gz
linux-2b0b16d329add49d503ff08b45d7636731f493dc.tar.xz
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: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/intel_th/pci.c')
-rw-r--r--drivers/hwtracing/intel_th/pci.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c
new file mode 100644
index 000000000000..641e87936064
--- /dev/null
+++ b/drivers/hwtracing/intel_th/pci.c
@@ -0,0 +1,86 @@
+/*
+ * 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>");