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 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
  *
  * 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.
  *     * Neither the name of Freescale Semiconductor nor the
  *   names of its contributors may be used to endorse or promote products
  *   derived from this software without specific prior written permission.
  *
  * ALTERNATIVELY, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") as published by the Free Software
  * Foundation, either version 2 of that License or (at your option) any
  * later version.
  *
  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef __FSL_BMAN_H
 #define __FSL_BMAN_H
 
 /* wrapper for 48-bit buffers */
 struct bm_buffer {
     union {
         struct {
             __be16 bpid; /* hi 8-bits reserved */
             __be16 hi; /* High 16-bits of 48-bit address */
             __be32 lo; /* Low 32-bits of 48-bit address */
         };
         __be64 data;
     };
 } __aligned(8);
 /*
  * Restore the 48 bit address previously stored in BMan
  * hardware pools as a dma_addr_t
  */
 static inline dma_addr_t bm_buf_addr(const struct bm_buffer *buf)
 {
     return be64_to_cpu(buf->data) & 0xffffffffffffLLU;
 }
 
 static inline u64 bm_buffer_get64(const struct bm_buffer *buf)
 {
     return be64_to_cpu(buf->data) & 0xffffffffffffLLU;
 }
 
 static inline void bm_buffer_set64(struct bm_buffer *buf, u64 addr)
 {
     buf->hi = cpu_to_be16(upper_32_bits(addr));
     buf->lo = cpu_to_be32(lower_32_bits(addr));
 }
 
 static inline u8 bm_buffer_get_bpid(const struct bm_buffer *buf)
 {
     return be16_to_cpu(buf->bpid) & 0xff;
 }
 
 static inline void bm_buffer_set_bpid(struct bm_buffer *buf, int bpid)
 {
     buf->bpid = cpu_to_be16(bpid & 0xff);
 }
 
 /* Managed portal, high-level i/face */
 
 /* Portal and Buffer Pools */
 struct bman_portal;
 struct bman_pool;
 
 #define BM_POOL_MAX     64 /* max # of buffer pools */
 
 /**
  * bman_new_pool - Allocates a Buffer Pool object
  *
  * Creates a pool object, and returns a reference to it or NULL on error.
  */
 struct bman_pool *bman_new_pool(void);
 
 /**
  * bman_free_pool - Deallocates a Buffer Pool object
  * @pool: the pool object to release
  */
 void bman_free_pool(struct bman_pool *pool);
 
 /**
  * bman_get_bpid - Returns a pool object's BPID.
  * @pool: the pool object
  *
  * The returned value is the index of the encapsulated buffer pool,
  * in the range of [0, @BM_POOL_MAX-1].
  */
 int bman_get_bpid(const struct bman_pool *pool);
 
 /**
  * bman_release - Release buffer(s) to the buffer pool
  * @pool: the buffer pool object to release to
  * @bufs: an array of buffers to release
  * @num: the number of buffers in @bufs (1-8)
  *
  * Adds the given buffers to RCR entries. If the RCR ring is unresponsive,
  * the function will return -ETIMEDOUT. Otherwise, it returns zero.
  */
 int bman_release(struct bman_pool *pool, const struct bm_buffer *bufs, u8 num);
 
 /**
  * bman_acquire - Acquire buffer(s) from a buffer pool
  * @pool: the buffer pool object to acquire from
  * @bufs: array for storing the acquired buffers
  * @num: the number of buffers desired (@bufs is at least this big)
  *
  * Issues an "Acquire" command via the portal's management command interface.
  * The return value will be the number of buffers obtained from the pool, or a
  * negative error code if a h/w error or pool starvation was encountered. In
  * the latter case, the content of @bufs is undefined.
  */
 int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num);
 
 /**
  * bman_is_probed - Check if bman is probed
  *
  * Returns 1 if the bman driver successfully probed, -1 if the bman driver
  * failed to probe or 0 if the bman driver did not probed yet.
  */
 int bman_is_probed(void);
 /**
  * bman_portals_probed - Check if all cpu bound bman portals are probed
  *
  * Returns 1 if all the required cpu bound bman portals successfully probed,
  * -1 if probe errors appeared or 0 if the bman portals did not yet finished
  * probing.
  */
 int bman_portals_probed(void);
 
 #endif  /* __FSL_BMAN_H */

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