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path: root/drivers/misc/mic/scif/scif_peer_bus.c
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Diffstat (limited to 'drivers/misc/mic/scif/scif_peer_bus.c')
-rw-r--r--drivers/misc/mic/scif/scif_peer_bus.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/misc/mic/scif/scif_peer_bus.c b/drivers/misc/mic/scif/scif_peer_bus.c
new file mode 100644
index 000000000000..589ae9ad2501
--- /dev/null
+++ b/drivers/misc/mic/scif/scif_peer_bus.c
@@ -0,0 +1,124 @@
+/*
+ * 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 SCIF driver.
+ */
+#include "scif_main.h"
+#include "../bus/scif_bus.h"
+#include "scif_peer_bus.h"
+
+static inline struct scif_peer_dev *
+dev_to_scif_peer(struct device *dev)
+{
+ return container_of(dev, struct scif_peer_dev, dev);
+}
+
+static inline struct scif_peer_driver *
+drv_to_scif_peer(struct device_driver *drv)
+{
+ return container_of(drv, struct scif_peer_driver, driver);
+}
+
+static int scif_peer_dev_match(struct device *dv, struct device_driver *dr)
+{
+ return !strncmp(dev_name(dv), dr->name, 4);
+}
+
+static int scif_peer_dev_probe(struct device *d)
+{
+ struct scif_peer_dev *dev = dev_to_scif_peer(d);
+ struct scif_peer_driver *drv = drv_to_scif_peer(dev->dev.driver);
+
+ return drv->probe(dev);
+}
+
+static int scif_peer_dev_remove(struct device *d)
+{
+ struct scif_peer_dev *dev = dev_to_scif_peer(d);
+ struct scif_peer_driver *drv = drv_to_scif_peer(dev->dev.driver);
+
+ drv->remove(dev);
+ return 0;
+}
+
+static struct bus_type scif_peer_bus = {
+ .name = "scif_peer_bus",
+ .match = scif_peer_dev_match,
+ .probe = scif_peer_dev_probe,
+ .remove = scif_peer_dev_remove,
+};
+
+int scif_peer_register_driver(struct scif_peer_driver *driver)
+{
+ driver->driver.bus = &scif_peer_bus;
+ return driver_register(&driver->driver);
+}
+
+void scif_peer_unregister_driver(struct scif_peer_driver *driver)
+{
+ driver_unregister(&driver->driver);
+}
+
+static void scif_peer_release_dev(struct device *d)
+{
+ struct scif_peer_dev *sdev = dev_to_scif_peer(d);
+ struct scif_dev *scifdev = &scif_dev[sdev->dnode];
+
+ scif_cleanup_scifdev(scifdev);
+ kfree(sdev);
+}
+
+struct scif_peer_dev *
+scif_peer_register_device(struct scif_dev *scifdev)
+{
+ int ret;
+ struct scif_peer_dev *spdev;
+
+ spdev = kzalloc(sizeof(*spdev), GFP_KERNEL);
+ if (!spdev)
+ return ERR_PTR(-ENOMEM);
+
+ spdev->dev.parent = scifdev->sdev->dev.parent;
+ spdev->dev.release = scif_peer_release_dev;
+ spdev->dnode = scifdev->node;
+ spdev->dev.bus = &scif_peer_bus;
+
+ dev_set_name(&spdev->dev, "scif_peer-dev%u", spdev->dnode);
+ /*
+ * device_register() causes the bus infrastructure to look for a
+ * matching driver.
+ */
+ ret = device_register(&spdev->dev);
+ if (ret)
+ goto free_spdev;
+ return spdev;
+free_spdev:
+ kfree(spdev);
+ return ERR_PTR(ret);
+}
+
+void scif_peer_unregister_device(struct scif_peer_dev *sdev)
+{
+ device_unregister(&sdev->dev);
+}
+
+int scif_peer_bus_init(void)
+{
+ return bus_register(&scif_peer_bus);
+}
+
+void scif_peer_bus_exit(void)
+{
+ bus_unregister(&scif_peer_bus);
+}