File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/misc/mic/bus/scif_bus.c b/drivers/misc/mic/bus/scif_bus.c
new file mode 100644
index 0000000..ff6e01c
--- /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, 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.archdata.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");