export RK_PA3

hc

2024-02-19 151fecfb72a0d602dfe79790602ef64b4e241574

 kernel/include/rdma/rdmavt_cq.h
..
..
@@ -1,58 +1,14 @@
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+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
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+/*
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+ * Copyright(c) 2016 - 2018 Intel Corporation.
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+ */
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+
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 #ifndef DEF_RDMAVT_INCCQ_H
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 #define DEF_RDMAVT_INCCQ_H
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8
 
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-/*
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- *
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- * This file is provided under a dual BSD/GPLv2 license.  When using or
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- * redistributing this file, you may do so under either license.
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- *
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- * GPL LICENSE SUMMARY
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- *
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- * Copyright(c) 2016 - 2018 Intel Corporation.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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- *
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- * BSD LICENSE
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- *
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- * Copyright(c) 2015 Intel Corporation.
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- *
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- * Redistribution and use in source and binary forms, with or without
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- * modification, are permitted provided that the following conditions
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- * are met:
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- *
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- *  - Redistributions of source code must retain the above copyright
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- *    notice, this list of conditions and the following disclaimer.
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- *  - Redistributions in binary form must reproduce the above copyright
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- *    notice, this list of conditions and the following disclaimer in
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- *    the documentation and/or other materials provided with the
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- *    distribution.
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- *  - Neither the name of Intel Corporation nor the names of its
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- *    contributors may be used to endorse or promote products derived
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- *    from this software without specific prior written permission.
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- *
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- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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- *
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- */
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-
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 #include <linux/kthread.h>
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 #include <rdma/ib_user_verbs.h>
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+#include <rdma/ib_verbs.h>
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12
 
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 /*
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  * Define an ib_cq_notify value that is not valid so we know when CQ
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@@ -61,18 +17,27 @@
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 #define RVT_CQ_NONE      (IB_CQ_NEXT_COMP + 1)
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 /*
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+ * Define read macro that apply smp_load_acquire memory barrier
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+ * when reading indice of circular buffer that mmaped to user space.
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+ */
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+#define RDMA_READ_UAPI_ATOMIC(member) smp_load_acquire(&(member).val)
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+
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+/*
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+ * Define write macro that uses smp_store_release memory barrier
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+ * when writing indice of circular buffer that mmaped to user space.
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+ */
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+#define RDMA_WRITE_UAPI_ATOMIC(member, x) smp_store_release(&(member).val, x)
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+#include <rdma/rvt-abi.h>
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+
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+/*
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  * This structure is used to contain the head pointer, tail pointer,
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  * and completion queue entries as a single memory allocation so
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  * it can be mmap'ed into user space.
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  */
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-struct rvt_cq_wc {
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+struct rvt_k_cq_wc {
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 	u32 head;               /* index of next entry to fill */
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 	u32 tail;               /* index of next ib_poll_cq() entry */
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-	union {
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-		/* these are actually size ibcq.cqe + 1 */
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-		struct ib_uverbs_wc uqueue[0];
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-		struct ib_wc kqueue[0];
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-	};
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+	struct ib_wc kqueue[];
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 };
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 /*
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@@ -84,10 +49,12 @@
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 	spinlock_t lock; /* protect changes in this struct */
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 	u8 notify;
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 	u8 triggered;
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+	u8 cq_full;
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 	int comp_vector_cpu;
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 	struct rvt_dev_info *rdi;
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 	struct rvt_cq_wc *queue;
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 	struct rvt_mmap_info *ip;
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+	struct rvt_k_cq_wc *kqueue;
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 };
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 static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq)
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@@ -95,6 +62,6 @@
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 	return container_of(ibcq, struct rvt_cq, ibcq);
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 }
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64
 
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-void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
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+bool rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
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 #endif          /* DEF_RDMAVT_INCCQH */