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 <tianx@yunsilicon.com>
Signed-off-by: Wei Honggang <weihg@yunsilicon.com>
Signed-off-by: Zhao Qianwei <zhaoqw@yunsilicon.com>
Signed-off-by: Li Qiang <liq@yunsilicon.com>
Signed-off-by: Yan Lei <jacky@yunsilicon.com>

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/bitmap.h

@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 - 2022, Shanghai Yunsilicon Technology Co., Ltd.
+ * All rights reserved.
+ */
+
+#ifndef BITMAP_H
+#define BITMAP_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/mman.h>
+#include <linux/errno.h>
+
+/* Only ia64 requires this */
+#ifdef __ia64__
+#define XSC_SHM_ADDR ((void *)0x8000000000000000UL)
+#define XSC_SHMAT_FLAGS (SHM_RND)
+#else
+#define XSC_SHM_ADDR NULL
+#define XSC_SHMAT_FLAGS 0
+#endif
+
+#define BITS_PER_LONG (8 * sizeof(long))
+#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_LONG)
+
+#ifndef HPAGE_SIZE
+#define HPAGE_SIZE (2UL * 1024 * 1024)
+#endif
+
+#define XSC_SHM_LENGTH HPAGE_SIZE
+#define XSC_Q_CHUNK_SIZE 32768
+#define XSC_SHM_NUM_REGION 64
+
+static inline unsigned long xsc_ffz(u32 word)
+{
+	return __builtin_ffs(~word) - 1;
+}
+
+static inline u32 xsc_find_first_zero_bit(const unsigned long *addr,
+					  u32 size)
+{
+	const unsigned long *p = addr;
+	u32 result = 0;
+	unsigned long tmp;
+
+	while (size & ~(BITS_PER_LONG - 1)) {
+		tmp = *(p++);
+		if (~tmp)
+			goto found;
+		result += BITS_PER_LONG;
+		size -= BITS_PER_LONG;
+	}
+	if (!size)
+		return result;
+
+	tmp = (*p) | (~0UL << size);
+	if (tmp == (u32)~0UL) /* Are any bits zero? */
+		return result + size; /* Nope. */
+found:
+	return result + xsc_ffz(tmp);
+}
+
+static inline void xsc_set_bit(unsigned int nr, unsigned long *addr)
+{
+	addr[(nr / BITS_PER_LONG)] |= (1 << (nr % BITS_PER_LONG));
+}
+
+static inline void xsc_clear_bit(unsigned int nr, unsigned long *addr)
+{
+	addr[(nr / BITS_PER_LONG)] &= ~(1 << (nr % BITS_PER_LONG));
+}
+
+static inline int xsc_test_bit(unsigned int nr, const unsigned long *addr)
+{
+	return !!(addr[(nr / BITS_PER_LONG)] & (1 << (nr % BITS_PER_LONG)));
+}
+
+#endif