Linux-libre 4.6.2-gnu

4 files changed, 346 insertions, 0 deletions

diff --git a/drivers/misc/mic/bus/Makefile b/drivers/misc/mic/bus/Makefile
index 761842b0d..8758a7daa 100644
--- a/drivers/misc/mic/bus/Makefile
+++ b/drivers/misc/mic/bus/Makefile
@@ -5,3 +5,4 @@
 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.h b/drivers/misc/mic/bus/cosm_bus.h
index f7c57f266..8b6341855 100644
--- a/drivers/misc/mic/bus/cosm_bus.h
+++ b/drivers/misc/mic/bus/cosm_bus.h
@@ -30,6 +30,7 @@
  * @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.
@@ -55,6 +56,7 @@ 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;
diff --git a/drivers/misc/mic/bus/vop_bus.c b/drivers/misc/mic/bus/vop_bus.c
new file mode 100644
index 000000000..303da222f
--- /dev/null
+++ b/drivers/misc/mic/bus/vop_bus.c
@@ -0,0 +1,203 @@
+/*
+ * 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)
+{
+	put_device(d);
+}
+
+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.archdata.dma_ops = (struct dma_map_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:
+	kfree(vdev);
+	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 */