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Message-Id: <1442926040-15150-7-git-send-email-alexander.shishkin@linux.intel.com>
Date: Tue, 22 Sep 2015 15:47:15 +0300
From: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, mathieu.poirier@...aro.org,
peter.lachner@...el.com, norbert.schulz@...el.com,
keven.boell@...el.com, yann.fouassier@...el.com,
laurent.fert@...el.com,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH v4 06/11] 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@...ux.intel.com>
---
drivers/hwtracing/intel_th/Kconfig | 9 ++++
drivers/hwtracing/intel_th/Makefile | 3 ++
drivers/hwtracing/intel_th/pci.c | 86 +++++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+)
create mode 100644 drivers/hwtracing/intel_th/pci.c
diff --git a/drivers/hwtracing/intel_th/Kconfig b/drivers/hwtracing/intel_th/Kconfig
index 0cb01ee909..6601613614 100644
--- a/drivers/hwtracing/intel_th/Kconfig
+++ b/drivers/hwtracing/intel_th/Kconfig
@@ -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
diff --git a/drivers/hwtracing/intel_th/Makefile b/drivers/hwtracing/intel_th/Makefile
index dfd7906462..5c13ed4121 100644
--- a/drivers/hwtracing/intel_th/Makefile
+++ b/drivers/hwtracing/intel_th/Makefile
@@ -1,3 +1,6 @@
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
diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c
new file mode 100644
index 0000000000..641e879360
--- /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@...el.com>");
--
2.5.1
--
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