qat_common.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation
   3  */
   4
   5 #include "qat_common.h"
   6 #include "qat_logs.h"
   7
   8 int
   9 qat_sgl_fill_array(struct rte_mbuf *buf, uint64_t buf_start,
  10                 struct qat_sgl *list, uint32_t data_len)
  11 {
  12         int nr = 1;
  13
  14         uint32_t buf_len = rte_pktmbuf_iova(buf) -
  15                         buf_start + rte_pktmbuf_data_len(buf);
  16
  17         list->buffers[0].addr = buf_start;
  18         list->buffers[0].resrvd = 0;
  19         list->buffers[0].len = buf_len;
  20
  21         if (data_len <= buf_len) {
  22                 list->num_bufs = nr;
  23                 list->buffers[0].len = data_len;
  24                 return 0;
  25         }
  26
  27         buf = buf->next;
  28         while (buf) {
  29                 if (unlikely(nr == QAT_SGL_MAX_NUMBER)) {
  30                         PMD_DRV_LOG(ERR,
  31                                 "QAT PMD exceeded size of QAT SGL entry(%u)",
  32                                         QAT_SGL_MAX_NUMBER);
  33                         return -EINVAL;
  34                 }
  35
  36                 list->buffers[nr].len = rte_pktmbuf_data_len(buf);
  37                 list->buffers[nr].resrvd = 0;
  38                 list->buffers[nr].addr = rte_pktmbuf_iova(buf);
  39
  40                 buf_len += list->buffers[nr].len;
  41                 buf = buf->next;
  42
  43                 if (buf_len > data_len) {
  44                         list->buffers[nr].len -=
  45                                 buf_len - data_len;
  46                         buf = NULL;
  47                 }
  48                 ++nr;
  49         }
  50         list->num_bufs = nr;
  51
  52         return 0;
  53 }