qcacmn: Add QDF wrapper for nbuf frag ops

Introduce qdf wrapper API for nbuf frag based ops.

Change-Id: I0f4c1cb1aa9fcdd9dc2fc2f5716860eb286a1932
CRs-Fixed: 2733972

qdf/linux/src/i_qdf_nbuf_frag.h

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: i_qdf_nbuf_frag.h
+ * This file provides OS dependent nbuf frag API's.
+ */
+
+#ifndef _I_QDF_NBUF_FRAG_H
+#define _I_QDF_NBUF_FRAG_H
+
+#include <qdf_net_types.h>
+#include <qdf_mem.h>
+
+/**
+ * typedef __qdf_frag_t - Abstraction for void * for frag address
+ */
+typedef void *__qdf_frag_t;
+
+/**
+ * Maximum number of frags an SKB can hold
+ */
+#define __QDF_NBUF_MAX_FRAGS MAX_SKB_FRAGS
+
+/**
+ * __qdf_mem_unmap_page() - Unmap frag memory
+ * @osdev: qdf_device_t
+ * @paddr: Address to be unmapped
+ * @nbytes: Number of bytes to be unmapped
+ * @dir: qdf_dma_dir_t
+ */
+void __qdf_mem_unmap_page(qdf_device_t osdev, qdf_dma_addr_t paddr,
+			  size_t nbytes, qdf_dma_dir_t dir);
+
+/**
+ * __qdf_mem_map_page() - Map frag memory
+ * @osdev: qdf_device_t
+ * @buf: Vaddr to be mapped
+ * @dir: qdf_dma_dir_t
+ * @nbytes: Number of bytes to be mapped
+ * @paddr: Mapped physical address
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS __qdf_mem_map_page(qdf_device_t osdev, __qdf_frag_t buf,
+			      qdf_dma_dir_t dir, size_t nbytes,
+			      qdf_dma_addr_t *phy_addr);
+
+/**
+ * __qdf_frag_free() - Free allocated frag memory
+ * @vaddr: Frag address to be freed
+ */
+static inline void __qdf_frag_free(__qdf_frag_t vaddr)
+{
+	skb_free_frag(vaddr);
+}
+
+/**
+ * __qdf_frag_alloc() - Allocate frag Memory
+ * @fragsz: Size of frag memory to be allocated
+ *
+ * Return: Allocated frag addr.
+ */
+static inline __qdf_frag_t __qdf_frag_alloc(unsigned int fragsz)
+{
+	return netdev_alloc_frag(fragsz);
+}
+#endif /* _I_QDF_NBUF_FRAG_H */