rapidio: add enumeration/discovery start from user space

[~andy/linux] / drivers / rapidio / rio-sysfs.c

diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 4dbe360989be8b3ed1b156e7f61aeaafb5b68fff..66d4acd5e18fd8f230cbb732a12dce1b90f98978 100644 (file)
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c
@@ -285,3 +285,48 @@ void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
                        rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
        }
 }
+
+static ssize_t bus_scan_store(struct bus_type *bus, const char *buf,
+                               size_t count)
+{
+       long val;
+       struct rio_mport *port = NULL;
+       int rc;
+
+       if (kstrtol(buf, 0, &val) < 0)
+               return -EINVAL;
+
+       if (val == RIO_MPORT_ANY) {
+               rc = rio_init_mports();
+               goto exit;
+       }
+
+       if (val < 0 || val >= RIO_MAX_MPORTS)
+               return -EINVAL;
+
+       port = rio_find_mport((int)val);
+
+       if (!port) {
+               pr_debug("RIO: %s: mport_%d not available\n",
+                        __func__, (int)val);
+               return -EINVAL;
+       }
+
+       if (!port->nscan)
+               return -EINVAL;
+
+       if (port->host_deviceid >= 0)
+               rc = port->nscan->enumerate(port, 0);
+       else
+               rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT);
+exit:
+       if (!rc)
+               rc = count;
+
+       return rc;
+}
+
+struct bus_attribute rio_bus_attrs[] = {
+       __ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store),
+       __ATTR_NULL
+};