source: rtems-libbsd/linux/drivers/net/ethernet/freescale/fman/fman_sp.c @ 28ee86a

#include <machine/rtems-bsd-kernel-space.h>

#include <rtems/bsd/local/opt_dpaa.h>

/*
 * Copyright 2008 - 2015 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.
 */

#include "fman_sp.h"
#include "fman.h"

void fman_sp_set_buf_pools_in_asc_order_of_buf_sizes(struct fman_ext_pools
                                                     *fm_ext_pools,
                                                     u8 *ordered_array,
                                                     u16 *sizes_array)
{
        u16 buf_size = 0;
        int i = 0, j = 0, k = 0;

        /* First we copy the external buffers pools information
         * to an ordered local array
         */
        for (i = 0; i < fm_ext_pools->num_of_pools_used; i++) {
                /* get pool size */
                buf_size = fm_ext_pools->ext_buf_pool[i].size;

                /* keep sizes in an array according to poolId
                 * for direct access
                 */
                sizes_array[fm_ext_pools->ext_buf_pool[i].id] = buf_size;

                /* save poolId in an ordered array according to size */
                for (j = 0; j <= i; j++) {
                        /* this is the next free place in the array */
                        if (j == i)
                                ordered_array[i] =
                                    fm_ext_pools->ext_buf_pool[i].id;
                        else {
                                /* find the right place for this poolId */
                                if (buf_size < sizes_array[ordered_array[j]]) {
                                        /* move the pool_ids one place ahead
                                         * to make room for this poolId
                                         */
                                        for (k = i; k > j; k--)
                                                ordered_array[k] =
                                                    ordered_array[k - 1];

                                        /* now k==j, this is the place for
                                         * the new size
                                         */
                                        ordered_array[k] =
                                            fm_ext_pools->ext_buf_pool[i].id;
                                        break;
                                }
                        }
                }
        }
}

int fman_sp_build_buffer_struct(struct fman_sp_int_context_data_copy *
                                int_context_data_copy,
                                struct fman_buffer_prefix_content *
                                buffer_prefix_content,
                                struct fman_sp_buf_margins *buf_margins,
                                struct fman_sp_buffer_offsets *buffer_offsets,
                                u8 *internal_buf_offset)
{
        u32 tmp;

        /* Align start of internal context data to 16 byte */
        int_context_data_copy->ext_buf_offset = (u16)
                ((buffer_prefix_content->priv_data_size & (OFFSET_UNITS - 1)) ?
                ((buffer_prefix_content->priv_data_size + OFFSET_UNITS) &
                        ~(u16)(OFFSET_UNITS - 1)) :
                buffer_prefix_content->priv_data_size);

        /* Translate margin and int_context params to FM parameters */
        /* Initialize with illegal value. Later we'll set legal values. */
        buffer_offsets->prs_result_offset = (u32)ILLEGAL_BASE;
        buffer_offsets->time_stamp_offset = (u32)ILLEGAL_BASE;
        buffer_offsets->hash_result_offset = (u32)ILLEGAL_BASE;

        /* Internally the driver supports 4 options
         * 1. prsResult/timestamp/hashResult selection (in fact 8 options,
         * but for simplicity we'll
         * relate to it as 1).
         * 2. All IC context (from AD) not including debug.
         */

        /* This case covers the options under 1 */
        /* Copy size must be in 16-byte granularity. */
        int_context_data_copy->size =
            (u16)((buffer_prefix_content->pass_prs_result ? 32 : 0) +
                  ((buffer_prefix_content->pass_time_stamp ||
                  buffer_prefix_content->pass_hash_result) ? 16 : 0));

        /* Align start of internal context data to 16 byte */
        int_context_data_copy->int_context_offset =
            (u8)(buffer_prefix_content->pass_prs_result ? 32 :
                 ((buffer_prefix_content->pass_time_stamp ||
                 buffer_prefix_content->pass_hash_result) ? 64 : 0));

        if (buffer_prefix_content->pass_prs_result)
                buffer_offsets->prs_result_offset =
                    int_context_data_copy->ext_buf_offset;
        if (buffer_prefix_content->pass_time_stamp)
                buffer_offsets->time_stamp_offset =
                    buffer_prefix_content->pass_prs_result ?
                    (int_context_data_copy->ext_buf_offset +
                        sizeof(struct fman_prs_result)) :
                    int_context_data_copy->ext_buf_offset;
        if (buffer_prefix_content->pass_hash_result)
                /* If PR is not requested, whether TS is
                 * requested or not, IC will be copied from TS
                         */
                buffer_offsets->hash_result_offset =
                buffer_prefix_content->pass_prs_result ?
                        (int_context_data_copy->ext_buf_offset +
                                sizeof(struct fman_prs_result) + 8) :
                        int_context_data_copy->ext_buf_offset + 8;

        if (int_context_data_copy->size)
                buf_margins->start_margins =
                    (u16)(int_context_data_copy->ext_buf_offset +
                          int_context_data_copy->size);
        else
                /* No Internal Context passing, STartMargin is
                 * immediately after private_info
                 */
                buf_margins->start_margins =
                    buffer_prefix_content->priv_data_size;

        /* align data start */
        tmp = (u32)(buf_margins->start_margins %
                    buffer_prefix_content->data_align);
        if (tmp)
                buf_margins->start_margins +=
                    (buffer_prefix_content->data_align - tmp);
        buffer_offsets->data_offset = buf_margins->start_margins;

        return 0;
}