Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

8 files changed, 1176 insertions, 0 deletions

diff --git a/drivers/misc/mic/bus/Makefile b/drivers/misc/mic/bus/Makefile
new file mode 100644
index 000000000..8758a7daa
--- /dev/null
+++ b/drivers/misc/mic/bus/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile - Intel MIC Linux driver.
+# Copyright(c) 2014, Intel Corporation.
+#
+obj-$(CONFIG_INTEL_MIC_BUS) += mic_bus.o
+obj-$(CONFIG_SCIF_BUS) += scif_bus.o
+obj-$(CONFIG_MIC_COSM) += cosm_bus.o
+obj-$(CONFIG_VOP_BUS) += vop_bus.o
diff --git a/drivers/misc/mic/bus/cosm_bus.c b/drivers/misc/mic/bus/cosm_bus.c
new file mode 100644
index 000000000..d31d6c6e6
--- /dev/null
+++ b/drivers/misc/mic/bus/cosm_bus.c
@@ -0,0 +1,141 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC COSM Bus Driver
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include "cosm_bus.h"
+
+/* Unique numbering for cosm devices. */
+static DEFINE_IDA(cosm_index_ida);
+
+static int cosm_dev_probe(struct device *d)
+{
+	struct cosm_device *dev = dev_to_cosm(d);
+	struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
+
+	return drv->probe(dev);
+}
+
+static int cosm_dev_remove(struct device *d)
+{
+	struct cosm_device *dev = dev_to_cosm(d);
+	struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
+
+	drv->remove(dev);
+	return 0;
+}
+
+static struct bus_type cosm_bus = {
+	.name  = "cosm_bus",
+	.probe = cosm_dev_probe,
+	.remove = cosm_dev_remove,
+};
+
+int cosm_register_driver(struct cosm_driver *driver)
+{
+	driver->driver.bus = &cosm_bus;
+	return driver_register(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(cosm_register_driver);
+
+void cosm_unregister_driver(struct cosm_driver *driver)
+{
+	driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(cosm_unregister_driver);
+
+static inline void cosm_release_dev(struct device *d)
+{
+	struct cosm_device *cdev = dev_to_cosm(d);
+
+	kfree(cdev);
+}
+
+struct cosm_device *
+cosm_register_device(struct device *pdev, struct cosm_hw_ops *hw_ops)
+{
+	struct cosm_device *cdev;
+	int ret;
+
+	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+	if (!cdev)
+		return ERR_PTR(-ENOMEM);
+
+	cdev->dev.parent = pdev;
+	cdev->dev.release = cosm_release_dev;
+	cdev->hw_ops = hw_ops;
+	dev_set_drvdata(&cdev->dev, cdev);
+	cdev->dev.bus = &cosm_bus;
+
+	/* Assign a unique device index and hence name */
+	ret = ida_simple_get(&cosm_index_ida, 0, 0, GFP_KERNEL);
+	if (ret < 0)
+		goto free_cdev;
+
+	cdev->index = ret;
+	cdev->dev.id = ret;
+	dev_set_name(&cdev->dev, "cosm-dev%u", cdev->index);
+
+	ret = device_register(&cdev->dev);
+	if (ret)
+		goto ida_remove;
+	return cdev;
+ida_remove:
+	ida_simple_remove(&cosm_index_ida, cdev->index);
+free_cdev:
+	put_device(&cdev->dev);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(cosm_register_device);
+
+void cosm_unregister_device(struct cosm_device *dev)
+{
+	int index = dev->index; /* save for after device release */
+
+	device_unregister(&dev->dev);
+	ida_simple_remove(&cosm_index_ida, index);
+}
+EXPORT_SYMBOL_GPL(cosm_unregister_device);
+
+struct cosm_device *cosm_find_cdev_by_id(int id)
+{
+	struct device *dev = subsys_find_device_by_id(&cosm_bus, id, NULL);
+
+	return dev ? container_of(dev, struct cosm_device, dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(cosm_find_cdev_by_id);
+
+static int __init cosm_init(void)
+{
+	return bus_register(&cosm_bus);
+}
+
+static void __exit cosm_exit(void)
+{
+	bus_unregister(&cosm_bus);
+	ida_destroy(&cosm_index_ida);
+}
+
+core_initcall(cosm_init);
+module_exit(cosm_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) MIC card OS state management bus driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/bus/cosm_bus.h b/drivers/misc/mic/bus/cosm_bus.h
new file mode 100644
index 000000000..8b6341855
--- /dev/null
+++ b/drivers/misc/mic/bus/cosm_bus.h
@@ -0,0 +1,136 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC COSM Bus Driver
+ */
+#ifndef _COSM_BUS_H_
+#define _COSM_BUS_H_
+
+#include <linux/scif.h>
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+
+/**
+ * cosm_device - representation of a cosm device
+ *
+ * @attr_group: Pointer to list of sysfs attribute groups.
+ * @sdev: Device for sysfs entries.
+ * @state: MIC state.
+ * @prev_state: MIC state previous to MIC_RESETTING
+ * @shutdown_status: MIC status reported by card for shutdown/crashes.
+ * @shutdown_status_int: Internal shutdown status maintained by the driver
+ * @cosm_mutex: Mutex for synchronizing access to data structures.
+ * @reset_trigger_work: Work for triggering reset requests.
+ * @scif_work: Work for handling per device SCIF connections
+ * @cmdline: Kernel command line.
+ * @firmware: Firmware file name.
+ * @ramdisk: Ramdisk file name.
+ * @bootmode: Boot mode i.e. "linux" or "elf" for flash updates.
+ * @log_buf_addr: Log buffer address for MIC.
+ * @log_buf_len: Log buffer length address for MIC.
+ * @state_sysfs: Sysfs dirent for notifying ring 3 about MIC state changes.
+ * @hw_ops: the hardware bus ops for this device.
+ * @dev: underlying device.
+ * @index: unique position on the cosm bus
+ * @dbg_dir: debug fs directory
+ * @newepd: new endpoint from scif accept to be assigned to this cdev
+ * @epd: SCIF endpoint for this cdev
+ * @heartbeat_watchdog_enable: if heartbeat watchdog is enabled for this cdev
+ * @sysfs_heartbeat_enable: sysfs setting for disabling heartbeat notification
+ */
+struct cosm_device {
+	const struct attribute_group **attr_group;
+	struct device *sdev;
+	u8 state;
+	u8 prev_state;
+	u8 shutdown_status;
+	u8 shutdown_status_int;
+	struct mutex cosm_mutex;
+	struct work_struct reset_trigger_work;
+	struct work_struct scif_work;
+	char *cmdline;
+	char *firmware;
+	char *ramdisk;
+	char *bootmode;
+	void *log_buf_addr;
+	int *log_buf_len;
+	struct kernfs_node *state_sysfs;
+	struct cosm_hw_ops *hw_ops;
+	struct device dev;
+	int index;
+	struct dentry *dbg_dir;
+	scif_epd_t newepd;
+	scif_epd_t epd;
+	bool heartbeat_watchdog_enable;
+	bool sysfs_heartbeat_enable;
+};
+
+/**
+ * cosm_driver - operations for a cosm driver
+ *
+ * @driver: underlying device driver (populate name and owner).
+ * @probe: the function to call when a device is found.  Returns 0 or -errno.
+ * @remove: the function to call when a device is removed.
+ */
+struct cosm_driver {
+	struct device_driver driver;
+	int (*probe)(struct cosm_device *dev);
+	void (*remove)(struct cosm_device *dev);
+};
+
+/**
+ * cosm_hw_ops - cosm bus ops
+ *
+ * @reset: trigger MIC reset
+ * @force_reset: force MIC reset
+ * @post_reset: inform MIC reset is complete
+ * @ready: is MIC ready for OS download
+ * @start: boot MIC
+ * @stop: prepare MIC for reset
+ * @family: return MIC HW family string
+ * @stepping: return MIC HW stepping string
+ * @aper: return MIC PCIe aperture
+ */
+struct cosm_hw_ops {
+	void (*reset)(struct cosm_device *cdev);
+	void (*force_reset)(struct cosm_device *cdev);
+	void (*post_reset)(struct cosm_device *cdev, enum mic_states state);
+	bool (*ready)(struct cosm_device *cdev);
+	int (*start)(struct cosm_device *cdev, int id);
+	void (*stop)(struct cosm_device *cdev, bool force);
+	ssize_t (*family)(struct cosm_device *cdev, char *buf);
+	ssize_t (*stepping)(struct cosm_device *cdev, char *buf);
+	struct mic_mw *(*aper)(struct cosm_device *cdev);
+};
+
+struct cosm_device *
+cosm_register_device(struct device *pdev, struct cosm_hw_ops *hw_ops);
+void cosm_unregister_device(struct cosm_device *dev);
+int cosm_register_driver(struct cosm_driver *drv);
+void cosm_unregister_driver(struct cosm_driver *drv);
+struct cosm_device *cosm_find_cdev_by_id(int id);
+
+static inline struct cosm_device *dev_to_cosm(struct device *dev)
+{
+	return container_of(dev, struct cosm_device, dev);
+}
+
+static inline struct cosm_driver *drv_to_cosm(struct device_driver *drv)
+{
+	return container_of(drv, struct cosm_driver, driver);
+}
+#endif /* _COSM_BUS_H */
diff --git a/drivers/misc/mic/bus/mic_bus.c b/drivers/misc/mic/bus/mic_bus.c
new file mode 100644
index 000000000..77b16ca66
--- /dev/null
+++ b/drivers/misc/mic/bus/mic_bus.c
@@ -0,0 +1,204 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC Bus driver.
+ *
+ * This implementation is very similar to the the virtio bus driver
+ * implementation @ drivers/virtio/virtio.c
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <linux/mic_bus.h>
+
+static ssize_t device_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct mbus_device *dev = dev_to_mbus(d);
+	return sprintf(buf, "0x%04x\n", dev->id.device);
+}
+static DEVICE_ATTR_RO(device);
+
+static ssize_t vendor_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct mbus_device *dev = dev_to_mbus(d);
+	return sprintf(buf, "0x%04x\n", dev->id.vendor);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t modalias_show(struct device *d,
+			     struct device_attribute *attr, char *buf)
+{
+	struct mbus_device *dev = dev_to_mbus(d);
+	return sprintf(buf, "mbus:d%08Xv%08X\n",
+		       dev->id.device, dev->id.vendor);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *mbus_dev_attrs[] = {
+	&dev_attr_device.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(mbus_dev);
+
+static inline int mbus_id_match(const struct mbus_device *dev,
+				const struct mbus_device_id *id)
+{
+	if (id->device != dev->id.device && id->device != MBUS_DEV_ANY_ID)
+		return 0;
+
+	return id->vendor == MBUS_DEV_ANY_ID || id->vendor == dev->id.vendor;
+}
+
+/*
+ * This looks through all the IDs a driver claims to support.  If any of them
+ * match, we return 1 and the kernel will call mbus_dev_probe().
+ */
+static int mbus_dev_match(struct device *dv, struct device_driver *dr)
+{
+	unsigned int i;
+	struct mbus_device *dev = dev_to_mbus(dv);
+	const struct mbus_device_id *ids;
+
+	ids = drv_to_mbus(dr)->id_table;
+	for (i = 0; ids[i].device; i++)
+		if (mbus_id_match(dev, &ids[i]))
+			return 1;
+	return 0;
+}
+
+static int mbus_uevent(struct device *dv, struct kobj_uevent_env *env)
+{
+	struct mbus_device *dev = dev_to_mbus(dv);
+
+	return add_uevent_var(env, "MODALIAS=mbus:d%08Xv%08X",
+			      dev->id.device, dev->id.vendor);
+}
+
+static int mbus_dev_probe(struct device *d)
+{
+	int err;
+	struct mbus_device *dev = dev_to_mbus(d);
+	struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
+
+	err = drv->probe(dev);
+	if (!err)
+		if (drv->scan)
+			drv->scan(dev);
+	return err;
+}
+
+static int mbus_dev_remove(struct device *d)
+{
+	struct mbus_device *dev = dev_to_mbus(d);
+	struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
+
+	drv->remove(dev);
+	return 0;
+}
+
+static struct bus_type mic_bus = {
+	.name  = "mic_bus",
+	.match = mbus_dev_match,
+	.dev_groups = mbus_dev_groups,
+	.uevent = mbus_uevent,
+	.probe = mbus_dev_probe,
+	.remove = mbus_dev_remove,
+};
+
+int mbus_register_driver(struct mbus_driver *driver)
+{
+	driver->driver.bus = &mic_bus;
+	return driver_register(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(mbus_register_driver);
+
+void mbus_unregister_driver(struct mbus_driver *driver)
+{
+	driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(mbus_unregister_driver);
+
+static void mbus_release_dev(struct device *d)
+{
+	struct mbus_device *mbdev = dev_to_mbus(d);
+	kfree(mbdev);
+}
+
+struct mbus_device *
+mbus_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
+		     struct mbus_hw_ops *hw_ops, int index,
+		     void __iomem *mmio_va)
+{
+	int ret;
+	struct mbus_device *mbdev;
+
+	mbdev = kzalloc(sizeof(*mbdev), GFP_KERNEL);
+	if (!mbdev)
+		return ERR_PTR(-ENOMEM);
+
+	mbdev->mmio_va = mmio_va;
+	mbdev->dev.parent = pdev;
+	mbdev->id.device = id;
+	mbdev->id.vendor = MBUS_DEV_ANY_ID;
+	mbdev->dev.dma_ops = dma_ops;
+	mbdev->dev.dma_mask = &mbdev->dev.coherent_dma_mask;
+	dma_set_mask(&mbdev->dev, DMA_BIT_MASK(64));
+	mbdev->dev.release = mbus_release_dev;
+	mbdev->hw_ops = hw_ops;
+	mbdev->dev.bus = &mic_bus;
+	mbdev->index = index;
+	dev_set_name(&mbdev->dev, "mbus-dev%u", mbdev->index);
+	/*
+	 * device_register() causes the bus infrastructure to look for a
+	 * matching driver.
+	 */
+	ret = device_register(&mbdev->dev);
+	if (ret)
+		goto free_mbdev;
+	return mbdev;
+free_mbdev:
+	put_device(&mbdev->dev);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(mbus_register_device);
+
+void mbus_unregister_device(struct mbus_device *mbdev)
+{
+	device_unregister(&mbdev->dev);
+}
+EXPORT_SYMBOL_GPL(mbus_unregister_device);
+
+static int __init mbus_init(void)
+{
+	return bus_register(&mic_bus);
+}
+
+static void __exit mbus_exit(void)
+{
+	bus_unregister(&mic_bus);
+}
+
+core_initcall(mbus_init);
+module_exit(mbus_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) MIC Bus driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/bus/scif_bus.c b/drivers/misc/mic/bus/scif_bus.c
new file mode 100644
index 000000000..a444db5f6
--- /dev/null
+++ b/drivers/misc/mic/bus/scif_bus.c
@@ -0,0 +1,209 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * Intel Symmetric Communications Interface Bus driver.
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <linux/dma-mapping.h>
+
+#include "scif_bus.h"
+
+static ssize_t device_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct scif_hw_dev *dev = dev_to_scif(d);
+
+	return sprintf(buf, "0x%04x\n", dev->id.device);
+}
+static DEVICE_ATTR_RO(device);
+
+static ssize_t vendor_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct scif_hw_dev *dev = dev_to_scif(d);
+
+	return sprintf(buf, "0x%04x\n", dev->id.vendor);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t modalias_show(struct device *d,
+			     struct device_attribute *attr, char *buf)
+{
+	struct scif_hw_dev *dev = dev_to_scif(d);
+
+	return sprintf(buf, "scif:d%08Xv%08X\n",
+		       dev->id.device, dev->id.vendor);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *scif_dev_attrs[] = {
+	&dev_attr_device.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(scif_dev);
+
+static inline int scif_id_match(const struct scif_hw_dev *dev,
+				const struct scif_hw_dev_id *id)
+{
+	if (id->device != dev->id.device && id->device != SCIF_DEV_ANY_ID)
+		return 0;
+
+	return id->vendor == SCIF_DEV_ANY_ID || id->vendor == dev->id.vendor;
+}
+
+/*
+ * This looks through all the IDs a driver claims to support.  If any of them
+ * match, we return 1 and the kernel will call scif_dev_probe().
+ */
+static int scif_dev_match(struct device *dv, struct device_driver *dr)
+{
+	unsigned int i;
+	struct scif_hw_dev *dev = dev_to_scif(dv);
+	const struct scif_hw_dev_id *ids;
+
+	ids = drv_to_scif(dr)->id_table;
+	for (i = 0; ids[i].device; i++)
+		if (scif_id_match(dev, &ids[i]))
+			return 1;
+	return 0;
+}
+
+static int scif_uevent(struct device *dv, struct kobj_uevent_env *env)
+{
+	struct scif_hw_dev *dev = dev_to_scif(dv);
+
+	return add_uevent_var(env, "MODALIAS=scif:d%08Xv%08X",
+			      dev->id.device, dev->id.vendor);
+}
+
+static int scif_dev_probe(struct device *d)
+{
+	struct scif_hw_dev *dev = dev_to_scif(d);
+	struct scif_driver *drv = drv_to_scif(dev->dev.driver);
+
+	return drv->probe(dev);
+}
+
+static int scif_dev_remove(struct device *d)
+{
+	struct scif_hw_dev *dev = dev_to_scif(d);
+	struct scif_driver *drv = drv_to_scif(dev->dev.driver);
+
+	drv->remove(dev);
+	return 0;
+}
+
+static struct bus_type scif_bus = {
+	.name  = "scif_bus",
+	.match = scif_dev_match,
+	.dev_groups = scif_dev_groups,
+	.uevent = scif_uevent,
+	.probe = scif_dev_probe,
+	.remove = scif_dev_remove,
+};
+
+int scif_register_driver(struct scif_driver *driver)
+{
+	driver->driver.bus = &scif_bus;
+	return driver_register(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(scif_register_driver);
+
+void scif_unregister_driver(struct scif_driver *driver)
+{
+	driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(scif_unregister_driver);
+
+static void scif_release_dev(struct device *d)
+{
+	struct scif_hw_dev *sdev = dev_to_scif(d);
+
+	kfree(sdev);
+}
+
+struct scif_hw_dev *
+scif_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
+		     struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
+		     struct mic_mw *mmio, struct mic_mw *aper, void *dp,
+		     void __iomem *rdp, struct dma_chan **chan, int num_chan,
+		     bool card_rel_da)
+{
+	int ret;
+	struct scif_hw_dev *sdev;
+
+	sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
+	if (!sdev)
+		return ERR_PTR(-ENOMEM);
+
+	sdev->dev.parent = pdev;
+	sdev->id.device = id;
+	sdev->id.vendor = SCIF_DEV_ANY_ID;
+	sdev->dev.dma_ops = dma_ops;
+	sdev->dev.release = scif_release_dev;
+	sdev->hw_ops = hw_ops;
+	sdev->dnode = dnode;
+	sdev->snode = snode;
+	dev_set_drvdata(&sdev->dev, sdev);
+	sdev->dev.bus = &scif_bus;
+	sdev->mmio = mmio;
+	sdev->aper = aper;
+	sdev->dp = dp;
+	sdev->rdp = rdp;
+	sdev->dev.dma_mask = &sdev->dev.coherent_dma_mask;
+	dma_set_mask(&sdev->dev, DMA_BIT_MASK(64));
+	sdev->dma_ch = chan;
+	sdev->num_dma_ch = num_chan;
+	sdev->card_rel_da = card_rel_da;
+	dev_set_name(&sdev->dev, "scif-dev%u", sdev->dnode);
+	/*
+	 * device_register() causes the bus infrastructure to look for a
+	 * matching driver.
+	 */
+	ret = device_register(&sdev->dev);
+	if (ret)
+		goto free_sdev;
+	return sdev;
+free_sdev:
+	put_device(&sdev->dev);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(scif_register_device);
+
+void scif_unregister_device(struct scif_hw_dev *sdev)
+{
+	device_unregister(&sdev->dev);
+}
+EXPORT_SYMBOL_GPL(scif_unregister_device);
+
+static int __init scif_init(void)
+{
+	return bus_register(&scif_bus);
+}
+
+static void __exit scif_exit(void)
+{
+	bus_unregister(&scif_bus);
+}
+
+core_initcall(scif_init);
+module_exit(scif_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) SCIF Bus driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/bus/scif_bus.h b/drivers/misc/mic/bus/scif_bus.h
new file mode 100644
index 000000000..ff5956821
--- /dev/null
+++ b/drivers/misc/mic/bus/scif_bus.h
@@ -0,0 +1,133 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * Intel Symmetric Communications Interface Bus driver.
+ */
+#ifndef _SCIF_BUS_H_
+#define _SCIF_BUS_H_
+/*
+ * Everything a scif driver needs to work with any particular scif
+ * hardware abstraction layer.
+ */
+#include <linux/dma-mapping.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+
+struct scif_hw_dev_id {
+	u32 device;
+	u32 vendor;
+};
+
+#define MIC_SCIF_DEV 1
+#define SCIF_DEV_ANY_ID 0xffffffff
+
+/**
+ * scif_hw_dev - representation of a hardware device abstracted for scif
+ * @hw_ops: the hardware ops supported by this device
+ * @id: the device type identification (used to match it with a driver)
+ * @mmio: MMIO memory window
+ * @aper: Aperture memory window
+ * @dev: underlying device
+ * @dnode - The destination node which this device will communicate with.
+ * @snode - The source node for this device.
+ * @dp - Self device page
+ * @rdp - Remote device page
+ * @dma_ch - Array of DMA channels
+ * @num_dma_ch - Number of DMA channels available
+ * @card_rel_da - Set to true if DMA addresses programmed in the DMA engine
+ *		are relative to the card point of view
+ */
+struct scif_hw_dev {
+	struct scif_hw_ops *hw_ops;
+	struct scif_hw_dev_id id;
+	struct mic_mw *mmio;
+	struct mic_mw *aper;
+	struct device dev;
+	u8 dnode;
+	u8 snode;
+	void *dp;
+	void __iomem *rdp;
+	struct dma_chan **dma_ch;
+	int num_dma_ch;
+	bool card_rel_da;
+};
+
+/**
+ * scif_driver - operations for a scif I/O driver
+ * @driver: underlying device driver (populate name and owner).
+ * @id_table: the ids serviced by this driver.
+ * @probe: the function to call when a device is found.  Returns 0 or -errno.
+ * @remove: the function to call when a device is removed.
+ */
+struct scif_driver {
+	struct device_driver driver;
+	const struct scif_hw_dev_id *id_table;
+	int (*probe)(struct scif_hw_dev *dev);
+	void (*remove)(struct scif_hw_dev *dev);
+};
+
+/**
+ * scif_hw_ops - Hardware operations for accessing a SCIF device on the SCIF bus.
+ *
+ * @next_db: Obtain the next available doorbell.
+ * @request_irq: Request an interrupt on a particular doorbell.
+ * @free_irq: Free an interrupt requested previously.
+ * @ack_interrupt: acknowledge an interrupt in the ISR.
+ * @send_intr: Send an interrupt to the remote node on a specified doorbell.
+ * @send_p2p_intr: Send an interrupt to the peer node on a specified doorbell
+ * which is specifically targeted for a peer to peer node.
+ * @ioremap: Map a buffer with the specified physical address and length.
+ * @iounmap: Unmap a buffer previously mapped.
+ */
+struct scif_hw_ops {
+	int (*next_db)(struct scif_hw_dev *sdev);
+	struct mic_irq * (*request_irq)(struct scif_hw_dev *sdev,
+					irqreturn_t (*func)(int irq,
+							    void *data),
+					const char *name, void *data,
+					int db);
+	void (*free_irq)(struct scif_hw_dev *sdev,
+			 struct mic_irq *cookie, void *data);
+	void (*ack_interrupt)(struct scif_hw_dev *sdev, int num);
+	void (*send_intr)(struct scif_hw_dev *sdev, int db);
+	void (*send_p2p_intr)(struct scif_hw_dev *sdev, int db,
+			      struct mic_mw *mw);
+	void __iomem * (*ioremap)(struct scif_hw_dev *sdev,
+				  phys_addr_t pa, size_t len);
+	void (*iounmap)(struct scif_hw_dev *sdev, void __iomem *va);
+};
+
+int scif_register_driver(struct scif_driver *driver);
+void scif_unregister_driver(struct scif_driver *driver);
+struct scif_hw_dev *
+scif_register_device(struct device *pdev, int id,
+		     const struct dma_map_ops *dma_ops,
+		     struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
+		     struct mic_mw *mmio, struct mic_mw *aper,
+		     void *dp, void __iomem *rdp,
+		     struct dma_chan **chan, int num_chan,
+		     bool card_rel_da);
+void scif_unregister_device(struct scif_hw_dev *sdev);
+
+static inline struct scif_hw_dev *dev_to_scif(struct device *dev)
+{
+	return container_of(dev, struct scif_hw_dev, dev);
+}
+
+static inline struct scif_driver *drv_to_scif(struct device_driver *drv)
+{
+	return container_of(drv, struct scif_driver, driver);
+}
+#endif /* _SCIF_BUS_H */
diff --git a/drivers/misc/mic/bus/vop_bus.c b/drivers/misc/mic/bus/vop_bus.c
new file mode 100644
index 000000000..e5bb9c749
--- /dev/null
+++ b/drivers/misc/mic/bus/vop_bus.c
@@ -0,0 +1,205 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2016 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel Virtio Over PCIe (VOP) Bus driver.
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <linux/dma-mapping.h>
+
+#include "vop_bus.h"
+
+static ssize_t device_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct vop_device *dev = dev_to_vop(d);
+
+	return sprintf(buf, "0x%04x\n", dev->id.device);
+}
+static DEVICE_ATTR_RO(device);
+
+static ssize_t vendor_show(struct device *d,
+			   struct device_attribute *attr, char *buf)
+{
+	struct vop_device *dev = dev_to_vop(d);
+
+	return sprintf(buf, "0x%04x\n", dev->id.vendor);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t modalias_show(struct device *d,
+			     struct device_attribute *attr, char *buf)
+{
+	struct vop_device *dev = dev_to_vop(d);
+
+	return sprintf(buf, "vop:d%08Xv%08X\n",
+		       dev->id.device, dev->id.vendor);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *vop_dev_attrs[] = {
+	&dev_attr_device.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(vop_dev);
+
+static inline int vop_id_match(const struct vop_device *dev,
+			       const struct vop_device_id *id)
+{
+	if (id->device != dev->id.device && id->device != VOP_DEV_ANY_ID)
+		return 0;
+
+	return id->vendor == VOP_DEV_ANY_ID || id->vendor == dev->id.vendor;
+}
+
+/*
+ * This looks through all the IDs a driver claims to support.  If any of them
+ * match, we return 1 and the kernel will call vop_dev_probe().
+ */
+static int vop_dev_match(struct device *dv, struct device_driver *dr)
+{
+	unsigned int i;
+	struct vop_device *dev = dev_to_vop(dv);
+	const struct vop_device_id *ids;
+
+	ids = drv_to_vop(dr)->id_table;
+	for (i = 0; ids[i].device; i++)
+		if (vop_id_match(dev, &ids[i]))
+			return 1;
+	return 0;
+}
+
+static int vop_uevent(struct device *dv, struct kobj_uevent_env *env)
+{
+	struct vop_device *dev = dev_to_vop(dv);
+
+	return add_uevent_var(env, "MODALIAS=vop:d%08Xv%08X",
+			      dev->id.device, dev->id.vendor);
+}
+
+static int vop_dev_probe(struct device *d)
+{
+	struct vop_device *dev = dev_to_vop(d);
+	struct vop_driver *drv = drv_to_vop(dev->dev.driver);
+
+	return drv->probe(dev);
+}
+
+static int vop_dev_remove(struct device *d)
+{
+	struct vop_device *dev = dev_to_vop(d);
+	struct vop_driver *drv = drv_to_vop(dev->dev.driver);
+
+	drv->remove(dev);
+	return 0;
+}
+
+static struct bus_type vop_bus = {
+	.name  = "vop_bus",
+	.match = vop_dev_match,
+	.dev_groups = vop_dev_groups,
+	.uevent = vop_uevent,
+	.probe = vop_dev_probe,
+	.remove = vop_dev_remove,
+};
+
+int vop_register_driver(struct vop_driver *driver)
+{
+	driver->driver.bus = &vop_bus;
+	return driver_register(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(vop_register_driver);
+
+void vop_unregister_driver(struct vop_driver *driver)
+{
+	driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(vop_unregister_driver);
+
+static void vop_release_dev(struct device *d)
+{
+	struct vop_device *dev = dev_to_vop(d);
+
+	kfree(dev);
+}
+
+struct vop_device *
+vop_register_device(struct device *pdev, int id,
+		    const struct dma_map_ops *dma_ops,
+		    struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
+		    struct dma_chan *chan)
+{
+	int ret;
+	struct vop_device *vdev;
+
+	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
+	if (!vdev)
+		return ERR_PTR(-ENOMEM);
+
+	vdev->dev.parent = pdev;
+	vdev->id.device = id;
+	vdev->id.vendor = VOP_DEV_ANY_ID;
+	vdev->dev.dma_ops = dma_ops;
+	vdev->dev.dma_mask = &vdev->dev.coherent_dma_mask;
+	dma_set_mask(&vdev->dev, DMA_BIT_MASK(64));
+	vdev->dev.release = vop_release_dev;
+	vdev->hw_ops = hw_ops;
+	vdev->dev.bus = &vop_bus;
+	vdev->dnode = dnode;
+	vdev->aper = aper;
+	vdev->dma_ch = chan;
+	vdev->index = dnode - 1;
+	dev_set_name(&vdev->dev, "vop-dev%u", vdev->index);
+	/*
+	 * device_register() causes the bus infrastructure to look for a
+	 * matching driver.
+	 */
+	ret = device_register(&vdev->dev);
+	if (ret)
+		goto free_vdev;
+	return vdev;
+free_vdev:
+	put_device(&vdev->dev);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(vop_register_device);
+
+void vop_unregister_device(struct vop_device *dev)
+{
+	device_unregister(&dev->dev);
+}
+EXPORT_SYMBOL_GPL(vop_unregister_device);
+
+static int __init vop_init(void)
+{
+	return bus_register(&vop_bus);
+}
+
+static void __exit vop_exit(void)
+{
+	bus_unregister(&vop_bus);
+}
+
+core_initcall(vop_init);
+module_exit(vop_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) VOP Bus driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/bus/vop_bus.h b/drivers/misc/mic/bus/vop_bus.h
new file mode 100644
index 000000000..fff7a865d
--- /dev/null
+++ b/drivers/misc/mic/bus/vop_bus.h
@@ -0,0 +1,140 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2016 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel Virtio over PCIe Bus driver.
+ */
+#ifndef _VOP_BUS_H_
+#define _VOP_BUS_H_
+/*
+ * Everything a vop driver needs to work with any particular vop
+ * implementation.
+ */
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+
+#include "../common/mic_dev.h"
+
+struct vop_device_id {
+	u32 device;
+	u32 vendor;
+};
+
+#define VOP_DEV_TRNSP 1
+#define VOP_DEV_ANY_ID 0xffffffff
+/*
+ * Size of the internal buffer used during DMA's as an intermediate buffer
+ * for copy to/from user. Must be an integral number of pages.
+ */
+#define VOP_INT_DMA_BUF_SIZE PAGE_ALIGN(64 * 1024ULL)
+
+/**
+ * vop_device - representation of a device using vop
+ * @hw_ops: the hardware ops supported by this device.
+ * @id: the device type identification (used to match it with a driver).
+ * @dev: underlying device.
+ * @dnode - The destination node which this device will communicate with.
+ * @aper: Aperture memory window
+ * @dma_ch - DMA channel
+ * @index: unique position on the vop bus
+ */
+struct vop_device {
+	struct vop_hw_ops *hw_ops;
+	struct vop_device_id id;
+	struct device dev;
+	u8 dnode;
+	struct mic_mw *aper;
+	struct dma_chan *dma_ch;
+	int index;
+};
+
+/**
+ * vop_driver - operations for a vop I/O driver
+ * @driver: underlying device driver (populate name and owner).
+ * @id_table: the ids serviced by this driver.
+ * @probe: the function to call when a device is found.  Returns 0 or -errno.
+ * @remove: the function to call when a device is removed.
+ */
+struct vop_driver {
+	struct device_driver driver;
+	const struct vop_device_id *id_table;
+	int (*probe)(struct vop_device *dev);
+	void (*remove)(struct vop_device *dev);
+};
+
+/**
+ * vop_hw_ops - Hardware operations for accessing a VOP device on the VOP bus.
+ *
+ * @next_db: Obtain the next available doorbell.
+ * @request_irq: Request an interrupt on a particular doorbell.
+ * @free_irq: Free an interrupt requested previously.
+ * @ack_interrupt: acknowledge an interrupt in the ISR.
+ * @get_remote_dp: Get access to the virtio device page used by the remote
+ *                 node to add/remove/configure virtio devices.
+ * @get_dp: Get access to the virtio device page used by the self
+ *          node to add/remove/configure virtio devices.
+ * @send_intr: Send an interrupt to the peer node on a specified doorbell.
+ * @ioremap: Map a buffer with the specified DMA address and length.
+ * @iounmap: Unmap a buffer previously mapped.
+ * @dma_filter: The DMA filter function to use for obtaining access to
+ *		a DMA channel on the peer node.
+ */
+struct vop_hw_ops {
+	int (*next_db)(struct vop_device *vpdev);
+	struct mic_irq *(*request_irq)(struct vop_device *vpdev,
+				       irqreturn_t (*func)(int irq, void *data),
+				       const char *name, void *data,
+				       int intr_src);
+	void (*free_irq)(struct vop_device *vpdev,
+			 struct mic_irq *cookie, void *data);
+	void (*ack_interrupt)(struct vop_device *vpdev, int num);
+	void __iomem * (*get_remote_dp)(struct vop_device *vpdev);
+	void * (*get_dp)(struct vop_device *vpdev);
+	void (*send_intr)(struct vop_device *vpdev, int db);
+	void __iomem * (*ioremap)(struct vop_device *vpdev,
+				  dma_addr_t pa, size_t len);
+	void (*iounmap)(struct vop_device *vpdev, void __iomem *va);
+};
+
+struct vop_device *
+vop_register_device(struct device *pdev, int id,
+		    const struct dma_map_ops *dma_ops,
+		    struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
+		    struct dma_chan *chan);
+void vop_unregister_device(struct vop_device *dev);
+int vop_register_driver(struct vop_driver *drv);
+void vop_unregister_driver(struct vop_driver *drv);
+
+/*
+ * module_vop_driver() - Helper macro for drivers that don't do
+ * anything special in module init/exit.  This eliminates a lot of
+ * boilerplate.  Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit()
+ */
+#define module_vop_driver(__vop_driver) \
+	module_driver(__vop_driver, vop_register_driver, \
+			vop_unregister_driver)
+
+static inline struct vop_device *dev_to_vop(struct device *dev)
+{
+	return container_of(dev, struct vop_device, dev);
+}
+
+static inline struct vop_driver *drv_to_vop(struct device_driver *drv)
+{
+	return container_of(drv, struct vop_driver, driver);
+}
+#endif /* _VOP_BUS_H */