[PATCH 5/5] net/cnxk: add option to override outbound inline sa iv

[Akhil Goyal <gakhil@marvell.com>]

From: Nithin Dabilpuram <ndabilpuram@marvell.com>

Add option to override outbound inline sa iv for debug
purposes via environment variable. User can set env variable as:
export CN10K_ETH_SEC_IV_OVR="0x0, 0x0,..."

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---
 drivers/net/cnxk/cn10k_ethdev_sec.c | 35 +++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/net/cnxk/cn10k_ethdev_sec.c b/drivers/net/cnxk/cn10k_ethdev_sec.c
index 854498ef46..04ae300497 100644
--- a/drivers/net/cnxk/cn10k_ethdev_sec.c
+++ b/drivers/net/cnxk/cn10k_ethdev_sec.c
@@ -225,6 +225,36 @@ cn10k_eth_sec_sso_work_cb(uint64_t *gw, void *args)
 	rte_pktmbuf_free(mbuf);
 }
 
+static void
+outb_dbg_iv_update(struct roc_ot_ipsec_outb_sa *outb_sa, const char *__iv_str)
+{
+	uint8_t *iv_dbg = outb_sa->iv.iv_dbg;
+	char *iv_str = strdup(__iv_str);
+	char *iv_b = NULL, len = 16;
+	char *save;
+	int i;
+
+	if (!iv_str)
+		return;
+
+	if (outb_sa->w2.s.enc_type == ROC_IE_OT_SA_ENC_AES_GCM ||
+	    outb_sa->w2.s.auth_type == ROC_IE_OT_SA_AUTH_AES_GMAC)
+		len = 8;
+
+	memset(iv_dbg, len, sizeof(outb_sa->iv.iv_dbg));
+
+	for (i = 0; i < len; i++) {
+		iv_b = strtok_r(i ? NULL : iv_str, ",", &save);
+		if (!iv_b)
+			break;
+		iv_dbg[i] = strtoul(iv_b, NULL, 0);
+	}
+
+	/* Update source of IV */
+	outb_sa->w2.s.iv_src = ROC_IE_OT_SA_IV_SRC_FROM_SA;
+	free(iv_str);
+}
+
 static int
 cn10k_eth_sec_session_create(void *device,
 			     struct rte_security_session_conf *conf,
@@ -359,6 +389,7 @@ cn10k_eth_sec_session_create(void *device,
 		struct cn10k_outb_priv_data *outb_priv;
 		struct cnxk_ipsec_outb_rlens *rlens;
 		uint64_t sa_base = dev->outb.sa_base;
+		const char *iv_str;
 		uint32_t sa_idx;
 
 		PLT_STATIC_ASSERT(sizeof(struct cn10k_outb_priv_data) <
@@ -384,6 +415,10 @@ cn10k_eth_sec_session_create(void *device,
 			goto mempool_put;
 		}
 
+		iv_str = getenv("CN10K_ETH_SEC_IV_OVR");
+		if (iv_str)
+			outb_dbg_iv_update(outb_sa_dptr, iv_str);
+
 		/* Save userdata */
 		outb_priv->userdata = conf->userdata;
 		outb_priv->sa_idx = sa_idx;
-- 
2.25.1