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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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