libxscale: Add support for cq related verbs

This patch adds support for the following cq verbs:
1. create_cq
2. poll_cq
3. req_notify_cq
4. cq_event
5. resize_cq
6. destroy_cq

Signed-off-by: Tian Xin <[email protected]>
Signed-off-by: Wei Honggang <[email protected]>
Signed-off-by: Zhao Qianwei <[email protected]>
Signed-off-by: Li Qiang <[email protected]>
Signed-off-by: Yan Lei <[email protected]>

Author: tianx666

providers/xscale/CMakeLists.txt

@@ -1,4 +1,7 @@
 rdma_provider(xscale
   xscale.c
   verbs.c
+  cq.c
+  xsc_hsi.c
+  buf.c
 )

providers/xscale/buf.c

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 - 2022, Shanghai Yunsilicon Technology Co., Ltd.
+ * All rights reserved.
+ */
+
+#include <config.h>
+
+#include <signal.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "xscale.h"
+
+int xsc_alloc_buf(struct xsc_buf *buf, size_t size, int page_size)
+{
+	int ret;
+	int al_size;
+
+	al_size = align(size, page_size);
+	ret = posix_memalign(&buf->buf, page_size, al_size);
+	if (ret)
+		return ret;
+
+	ret = ibv_dontfork_range(buf->buf, al_size);
+	if (ret)
+		free(buf->buf);
+
+	buf->length = al_size;
+
+	return ret;
+}
+
+void xsc_free_buf(struct xsc_buf *buf)
+{
+	ibv_dofork_range(buf->buf, buf->length);
+	free(buf->buf);
+}