Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / infiniband / hw / mthca / mthca_uar.c

diff --git a/kernel/drivers/infiniband/hw/mthca/mthca_uar.c b/kernel/drivers/infiniband/hw/mthca/mthca_uar.c
new file mode 100644 (file)
index 0000000..ca5900c
--- /dev/null
+++ b/kernel/drivers/infiniband/hw/mthca/mthca_uar.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2005 Topspin Communications.  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 <asm/page.h>          /* PAGE_SHIFT */
+
+#include "mthca_dev.h"
+#include "mthca_memfree.h"
+
+int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar)
+{
+       uar->index = mthca_alloc(&dev->uar_table.alloc);
+       if (uar->index == -1)
+               return -ENOMEM;
+
+       uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
+
+       return 0;
+}
+
+void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar)
+{
+       mthca_free(&dev->uar_table.alloc, uar->index);
+}
+
+int mthca_init_uar_table(struct mthca_dev *dev)
+{
+       int ret;
+
+       ret = mthca_alloc_init(&dev->uar_table.alloc,
+                              dev->limits.num_uars,
+                              dev->limits.num_uars - 1,
+                              dev->limits.reserved_uars + 1);
+       if (ret)
+               return ret;
+
+       ret = mthca_init_db_tab(dev);
+       if (ret)
+               mthca_alloc_cleanup(&dev->uar_table.alloc);
+
+       return ret;
+}
+
+void mthca_cleanup_uar_table(struct mthca_dev *dev)
+{
+       mthca_cleanup_db_tab(dev);
+
+       /* XXX check if any UARs are still allocated? */
+       mthca_alloc_cleanup(&dev->uar_table.alloc);
+}