Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / ethernet / mellanox / mlx4 / icm.h

diff --git a/kernel/drivers/net/ethernet/mellanox/mlx4/icm.h b/kernel/drivers/net/ethernet/mellanox/mlx4/icm.h
new file mode 100644 (file)
index 0000000..0c73645
--- /dev/null
+++ b/kernel/drivers/net/ethernet/mellanox/mlx4/icm.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, 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.
+ */
+
+#ifndef MLX4_ICM_H
+#define MLX4_ICM_H
+
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/mutex.h>
+
+#define MLX4_ICM_CHUNK_LEN                                             \
+       ((256 - sizeof (struct list_head) - 2 * sizeof (int)) /         \
+        (sizeof (struct scatterlist)))
+
+enum {
+       MLX4_ICM_PAGE_SHIFT     = 12,
+       MLX4_ICM_PAGE_SIZE      = 1 << MLX4_ICM_PAGE_SHIFT,
+};
+
+struct mlx4_icm_chunk {
+       struct list_head        list;
+       int                     npages;
+       int                     nsg;
+       struct scatterlist      mem[MLX4_ICM_CHUNK_LEN];
+};
+
+struct mlx4_icm {
+       struct list_head        chunk_list;
+       int                     refcount;
+};
+
+struct mlx4_icm_iter {
+       struct mlx4_icm        *icm;
+       struct mlx4_icm_chunk  *chunk;
+       int                     page_idx;
+};
+
+struct mlx4_dev;
+
+struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
+                               gfp_t gfp_mask, int coherent);
+void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent);
+
+int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj,
+                  gfp_t gfp);
+void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj);
+int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+                        u32 start, u32 end);
+void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+                         u32 start, u32 end);
+int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+                       u64 virt, int obj_size, u32 nobj, int reserved,
+                       int use_lowmem, int use_coherent);
+void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table);
+void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj, dma_addr_t *dma_handle);
+
+static inline void mlx4_icm_first(struct mlx4_icm *icm,
+                                 struct mlx4_icm_iter *iter)
+{
+       iter->icm      = icm;
+       iter->chunk    = list_empty(&icm->chunk_list) ?
+               NULL : list_entry(icm->chunk_list.next,
+                                 struct mlx4_icm_chunk, list);
+       iter->page_idx = 0;
+}
+
+static inline int mlx4_icm_last(struct mlx4_icm_iter *iter)
+{
+       return !iter->chunk;
+}
+
+static inline void mlx4_icm_next(struct mlx4_icm_iter *iter)
+{
+       if (++iter->page_idx >= iter->chunk->nsg) {
+               if (iter->chunk->list.next == &iter->icm->chunk_list) {
+                       iter->chunk = NULL;
+                       return;
+               }
+
+               iter->chunk = list_entry(iter->chunk->list.next,
+                                        struct mlx4_icm_chunk, list);
+               iter->page_idx = 0;
+       }
+}
+
+static inline dma_addr_t mlx4_icm_addr(struct mlx4_icm_iter *iter)
+{
+       return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
+}
+
+static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter *iter)
+{
+       return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
+}
+
+int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm);
+int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev);
+
+#endif /* MLX4_ICM_H */