drivers/crypto/octeontx2/otx2_ipsec_po_ops.h

   1
   2 /* SPDX-License-Identifier: BSD-3-Clause
   3  * Copyright(C) 2019 Marvell International Ltd.
   4  */
   5
   6 #ifndef __OTX2_IPSEC_PO_OPS_H__
   7 #define __OTX2_IPSEC_PO_OPS_H__
   8
   9 #include <rte_crypto_sym.h>
  10 #include <rte_security.h>
  11
  12 #include "otx2_cryptodev.h"
  13 #include "otx2_security.h"
  14
  15 static __rte_always_inline int32_t
  16 otx2_ipsec_po_out_rlen_get(struct otx2_sec_session_ipsec_lp *sess,
  17                            uint32_t plen)
  18 {
  19         uint32_t enc_payload_len;
  20
  21         enc_payload_len = RTE_ALIGN_CEIL(plen + sess->roundup_len,
  22                         sess->roundup_byte);
  23
  24         return sess->partial_len + enc_payload_len;
  25 }
  26
  27 static __rte_always_inline struct cpt_request_info *
  28 alloc_request_struct(char *maddr, void *cop, int mdata_len)
  29 {
  30         struct cpt_request_info *req;
  31         struct cpt_meta_info *meta;
  32         uint8_t *resp_addr;
  33         uintptr_t *op;
  34
  35         meta = (void *)RTE_PTR_ALIGN((uint8_t *)maddr, 16);
  36
  37         op = (uintptr_t *)meta->deq_op_info;
  38         req = &meta->cpt_req;
  39         resp_addr = (uint8_t *)&meta->cpt_res;
  40
  41         req->completion_addr = (uint64_t *)((uint8_t *)resp_addr);
  42         *req->completion_addr = COMPLETION_CODE_INIT;
  43         req->comp_baddr = rte_mem_virt2iova(resp_addr);
  44         req->op = op;
  45
  46         op[0] = (uintptr_t)((uint64_t)meta | 1ull);
  47         op[1] = (uintptr_t)cop;
  48         op[2] = (uintptr_t)req;
  49         op[3] = mdata_len;
  50
  51         return req;
  52 }
  53
  54 static __rte_always_inline int
  55 process_outb_sa(struct rte_crypto_op *cop,
  56                struct otx2_sec_session_ipsec_lp *sess,
  57                struct cpt_qp_meta_info *m_info, void **prep_req)
  58 {
  59         uint32_t dlen, rlen, extend_head, extend_tail;
  60         struct rte_crypto_sym_op *sym_op = cop->sym;
  61         struct rte_mbuf *m_src = sym_op->m_src;
  62         struct cpt_request_info *req = NULL;
  63         struct otx2_ipsec_po_out_hdr *hdr;
  64         struct otx2_ipsec_po_out_sa *sa;
  65         int hdr_len, mdata_len, ret = 0;
  66         vq_cmd_word0_t word0;
  67         char *mdata, *data;
  68
  69         sa = &sess->out_sa;
  70         hdr_len = sizeof(*hdr);
  71
  72         dlen = rte_pktmbuf_pkt_len(m_src) + hdr_len;
  73         rlen = otx2_ipsec_po_out_rlen_get(sess, dlen - hdr_len);
  74
  75         extend_head = hdr_len + RTE_ETHER_HDR_LEN;
  76         extend_tail = rlen - dlen;
  77         mdata_len = m_info->lb_mlen + 8;
  78
  79         mdata = rte_pktmbuf_append(m_src, extend_tail + mdata_len);
  80         if (unlikely(mdata == NULL)) {
  81                 otx2_err("Not enough tail room\n");
  82                 ret = -ENOMEM;
  83                 goto exit;
  84         }
  85
  86         mdata += extend_tail; /* mdata follows encrypted data */
  87         req = alloc_request_struct(mdata, (void *)cop, mdata_len);
  88
  89         data = rte_pktmbuf_prepend(m_src, extend_head);
  90         if (unlikely(data == NULL)) {
  91                 otx2_err("Not enough head room\n");
  92                 ret = -ENOMEM;
  93                 goto exit;
  94         }
  95
  96         /*
  97          * Move the Ethernet header, to insert otx2_ipsec_po_out_hdr prior
  98          * to the IP header
  99          */
 100         memcpy(data, data + hdr_len, RTE_ETHER_HDR_LEN);
 101
 102         hdr = (struct otx2_ipsec_po_out_hdr *)rte_pktmbuf_adj(m_src,
 103                                                         RTE_ETHER_HDR_LEN);
 104
 105         memcpy(&hdr->iv[0], rte_crypto_op_ctod_offset(cop, uint8_t *,
 106                 sess->iv_offset), sess->iv_length);
 107
 108         /* Prepare CPT instruction */
 109         word0.u64 = sess->ucmd_w0;
 110         word0.s.dlen = dlen;
 111
 112         req->ist.ei0 = word0.u64;
 113         req->ist.ei1 = rte_pktmbuf_iova(m_src);
 114         req->ist.ei2 = req->ist.ei1;
 115
 116         sa->esn_hi = sess->seq_hi;
 117
 118         hdr->seq = rte_cpu_to_be_32(sess->seq_lo);
 119         hdr->ip_id = rte_cpu_to_be_32(sess->ip_id);
 120
 121         sess->ip_id++;
 122         sess->esn++;
 123
 124 exit:
 125         *prep_req = req;
 126
 127         return ret;
 128 }
 129
 130 static __rte_always_inline int
 131 process_inb_sa(struct rte_crypto_op *cop,
 132               struct otx2_sec_session_ipsec_lp *sess,
 133               struct cpt_qp_meta_info *m_info, void **prep_req)
 134 {
 135         struct rte_crypto_sym_op *sym_op = cop->sym;
 136         struct rte_mbuf *m_src = sym_op->m_src;
 137         struct cpt_request_info *req = NULL;
 138         int mdata_len, ret = 0;
 139         vq_cmd_word0_t word0;
 140         uint32_t dlen;
 141         char *mdata;
 142
 143         dlen = rte_pktmbuf_pkt_len(m_src);
 144         mdata_len = m_info->lb_mlen + 8;
 145
 146         mdata = rte_pktmbuf_append(m_src, mdata_len);
 147         if (unlikely(mdata == NULL)) {
 148                 otx2_err("Not enough tail room\n");
 149                 ret = -ENOMEM;
 150                 goto exit;
 151         }
 152
 153         req = alloc_request_struct(mdata, (void *)cop, mdata_len);
 154
 155         /* Prepare CPT instruction */
 156         word0.u64 = sess->ucmd_w0;
 157         word0.s.dlen   = dlen;
 158
 159         req->ist.ei0 = word0.u64;
 160         req->ist.ei1 = rte_pktmbuf_iova(m_src);
 161         req->ist.ei2 = req->ist.ei1;
 162
 163 exit:
 164         *prep_req = req;
 165         return ret;
 166 }
 167 #endif /* __OTX2_IPSEC_PO_OPS_H__ */