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 otx2_ipsec_po_sa_ctl *ctl_wrd;
  63         struct cpt_request_info *req = NULL;
  64         struct otx2_ipsec_po_out_hdr *hdr;
  65         struct otx2_ipsec_po_out_sa *sa;
  66         int hdr_len, mdata_len, ret = 0;
  67         vq_cmd_word0_t word0;
  68         char *mdata, *data;
  69
  70         sa = &sess->out_sa;
  71         ctl_wrd = &sa->ctl;
  72         hdr_len = sizeof(*hdr);
  73
  74         dlen = rte_pktmbuf_pkt_len(m_src) + hdr_len;
  75         rlen = otx2_ipsec_po_out_rlen_get(sess, dlen - hdr_len);
  76
  77         extend_head = hdr_len + RTE_ETHER_HDR_LEN;
  78         extend_tail = rlen - dlen;
  79         mdata_len = m_info->lb_mlen + 8;
  80
  81         mdata = rte_pktmbuf_append(m_src, extend_tail + mdata_len);
  82         if (unlikely(mdata == NULL)) {
  83                 otx2_err("Not enough tail room\n");
  84                 ret = -ENOMEM;
  85                 goto exit;
  86         }
  87
  88         mdata += extend_tail; /* mdata follows encrypted data */
  89         req = alloc_request_struct(mdata, (void *)cop, mdata_len);
  90
  91         data = rte_pktmbuf_prepend(m_src, extend_head);
  92         if (unlikely(data == NULL)) {
  93                 otx2_err("Not enough head room\n");
  94                 ret = -ENOMEM;
  95                 goto exit;
  96         }
  97
  98         /*
  99          * Move the Ethernet header, to insert otx2_ipsec_po_out_hdr prior
 100          * to the IP header
 101          */
 102         memcpy(data, data + hdr_len, RTE_ETHER_HDR_LEN);
 103
 104         hdr = (struct otx2_ipsec_po_out_hdr *)rte_pktmbuf_adj(m_src,
 105                                                         RTE_ETHER_HDR_LEN);
 106
 107         if (ctl_wrd->enc_type == OTX2_IPSEC_FP_SA_ENC_AES_GCM) {
 108                 memcpy(&hdr->iv[0], &sa->iv.gcm.nonce, 4);
 109                 memcpy(&hdr->iv[4], rte_crypto_op_ctod_offset(cop, uint8_t *,
 110                         sess->iv_offset), sess->iv_length);
 111         } else if (ctl_wrd->auth_type == OTX2_IPSEC_FP_SA_ENC_AES_CBC) {
 112                 memcpy(&hdr->iv[0], rte_crypto_op_ctod_offset(cop, uint8_t *,
 113                         sess->iv_offset), sess->iv_length);
 114         }
 115
 116         /* Prepare CPT instruction */
 117         word0.u64 = sess->ucmd_w0;
 118         word0.s.dlen = dlen;
 119
 120         req->ist.ei0 = word0.u64;
 121         req->ist.ei1 = rte_pktmbuf_iova(m_src);
 122         req->ist.ei2 = req->ist.ei1;
 123         req->ist.ei3 = sess->ucmd_w3;
 124
 125         hdr->seq = rte_cpu_to_be_32(sess->seq_lo);
 126         hdr->ip_id = rte_cpu_to_be_32(sess->ip_id);
 127
 128         sess->ip_id++;
 129         sess->esn++;
 130
 131 exit:
 132         *prep_req = req;
 133
 134         return ret;
 135 }
 136
 137 static __rte_always_inline int
 138 process_inb_sa(struct rte_crypto_op *cop,
 139               struct otx2_sec_session_ipsec_lp *sess,
 140               struct cpt_qp_meta_info *m_info, void **prep_req)
 141 {
 142         struct rte_crypto_sym_op *sym_op = cop->sym;
 143         struct rte_mbuf *m_src = sym_op->m_src;
 144         struct cpt_request_info *req = NULL;
 145         int mdata_len, ret = 0;
 146         vq_cmd_word0_t word0;
 147         uint32_t dlen;
 148         char *mdata;
 149
 150         dlen = rte_pktmbuf_pkt_len(m_src);
 151         mdata_len = m_info->lb_mlen + 8;
 152
 153         mdata = rte_pktmbuf_append(m_src, mdata_len);
 154         if (unlikely(mdata == NULL)) {
 155                 otx2_err("Not enough tail room\n");
 156                 ret = -ENOMEM;
 157                 goto exit;
 158         }
 159
 160         req = alloc_request_struct(mdata, (void *)cop, mdata_len);
 161
 162         /* Prepare CPT instruction */
 163         word0.u64 = sess->ucmd_w0;
 164         word0.s.dlen   = dlen;
 165
 166         req->ist.ei0 = word0.u64;
 167         req->ist.ei1 = rte_pktmbuf_iova(m_src);
 168         req->ist.ei2 = req->ist.ei1;
 169         req->ist.ei3 = sess->ucmd_w3;
 170
 171 exit:
 172         *prep_req = req;
 173         return ret;
 174 }
 175 #endif /* __OTX2_IPSEC_PO_OPS_H__ */