/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */ /* * Copyright (c) 2016 Mellanox Technologies Ltd. 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.
*/
/* This data structure is stored at the base of work and * completion queues shared between user space and kernel space. * It contains the producer and consumer indices. Is also * contains a copy of the queue size parameters for user space * to use but the kernel must use the parameters in the * rxe_queue struct. For performance reasons arrange to have * producer and consumer indices in separate cache lines * the kernel should always mask the indices to avoid accessing * memory outside of the data area
*/ struct rxe_queue_buf {
__u32 log2_elem_size;
__u32 index_mask;
__u32 pad_1[30];
__u32 producer_index;
__u32 pad_2[31];
__u32 consumer_index;
__u32 pad_3[31];
__u8 data[];
};
#endif/* RDMA_USER_RXE_H */
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