This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / infiniband / hw / amso1100 / c2_pd.c

diff --git a/drivers/infiniband/hw/amso1100/c2_pd.c b/drivers/infiniband/hw/amso1100/c2_pd.c
new file mode 100644 (file)
index 0000000..00c7099
--- /dev/null
+++ b/drivers/infiniband/hw/amso1100/c2_pd.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include "c2.h"
+#include "c2_provider.h"
+
+int c2_pd_alloc(struct c2_dev *c2dev, int privileged, struct c2_pd *pd)
+{
+       u32 obj;
+       int ret = 0;
+
+       spin_lock(&c2dev->pd_table.lock);
+       obj = find_next_zero_bit(c2dev->pd_table.table, c2dev->pd_table.max,
+                                c2dev->pd_table.last);
+       if (obj >= c2dev->pd_table.max)
+               obj = find_first_zero_bit(c2dev->pd_table.table,
+                                         c2dev->pd_table.max);
+       if (obj < c2dev->pd_table.max) {
+               pd->pd_id = obj;
+               __set_bit(obj, c2dev->pd_table.table);
+               c2dev->pd_table.last = obj+1;
+               if (c2dev->pd_table.last >= c2dev->pd_table.max)
+                       c2dev->pd_table.last = 0;
+       } else
+               ret = -ENOMEM;
+       spin_unlock(&c2dev->pd_table.lock);
+       return ret;
+}
+
+void c2_pd_free(struct c2_dev *c2dev, struct c2_pd *pd)
+{
+       spin_lock(&c2dev->pd_table.lock);
+       __clear_bit(pd->pd_id, c2dev->pd_table.table);
+       spin_unlock(&c2dev->pd_table.lock);
+}
+
+int __devinit c2_init_pd_table(struct c2_dev *c2dev)
+{
+
+       c2dev->pd_table.last = 0;
+       c2dev->pd_table.max = c2dev->props.max_pd;
+       spin_lock_init(&c2dev->pd_table.lock);
+       c2dev->pd_table.table = kmalloc(BITS_TO_LONGS(c2dev->props.max_pd) *
+                                       sizeof(long), GFP_KERNEL);
+       if (!c2dev->pd_table.table)
+               return -ENOMEM;
+       bitmap_zero(c2dev->pd_table.table, c2dev->props.max_pd);
+       return 0;
+}
+
+void __devexit c2_cleanup_pd_table(struct c2_dev *c2dev)
+{
+       kfree(c2dev->pd_table.table);
+}