[net-next PATCH v1 09/15] octeontx2-pf: ipsec: Allocate Ingress SA table

Tanmay Jagdale
2025-05-02T13:23:32Z

Every NIX LF has the facility to maintain a contiguous SA table that
is used by NIX RX to find the exact SA context pointer associated with
a particular flow. Allocate a 128-entry SA table where each entry is of
2048 bytes which is enough to hold the complete inbound SA context.

Add the structure definitions for SA context (cn10k_rx_sa_s) and
SA bookkeeping information (ctx_inb_ctx_info).

Also, initialize the inb_sw_ctx_list to track all the SA's and their
associated NPC rules and hash table related data.

Signed-off-by: Tanmay Jagdale <tanmay@marvell.com>
---
.../marvell/octeontx2/nic/cn10k_ipsec.c | 20 ++++
.../marvell/octeontx2/nic/cn10k_ipsec.h | 93 +++++++++++++++++++
2 files changed, 113 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
index fc59e50bafce..c435dcae4929 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
@@ -787,6 +787,7 @@ int cn10k_ipsec_init(struct net_device *netdev)
{
struct otx2_nic *pf = netdev_priv(netdev);
u32 sa_size;
+ int err;

if (!is_dev_support_ipsec_offload(pf->pdev))
return 0;
@@ -797,6 +798,22 @@ int cn10k_ipsec_init(struct net_device *netdev)
OTX2_ALIGN : sizeof(struct cn10k_tx_sa_s);
pf->ipsec.sa_size = sa_size;

+ /* Set sa_tbl_entry_sz to 2048 since we are programming NIX RX
+ * to calculate SA index as SPI * 2048. The first 1024 bytes
+ * are used for SA context and the next half for bookkeeping data.
+ */
+ pf->ipsec.sa_tbl_entry_sz = 2048;
+ err = qmem_alloc(pf->dev, &pf->ipsec.inb_sa, CN10K_IPSEC_INB_MAX_SA,
+ pf->ipsec.sa_tbl_entry_sz);
+ if (err)
+ return err;
+
+ memset(pf->ipsec.inb_sa->base, 0,
+ pf->ipsec.sa_tbl_entry_sz * CN10K_IPSEC_INB_MAX_SA);
+
+ /* List to track all ingress SAs */
+ INIT_LIST_HEAD(&pf->ipsec.inb_sw_ctx_list);
+
INIT_WORK(&pf->ipsec.sa_work, cn10k_ipsec_sa_wq_handler);
pf->ipsec.sa_workq = alloc_workqueue("cn10k_ipsec_sa_workq", 0, 0);
if (!pf->ipsec.sa_workq) {
@@ -828,6 +845,9 @@ void cn10k_ipsec_clean(struct otx2_nic *pf)
}

cn10k_outb_cpt_clean(pf);
+
+ /* Free Ingress SA table */
+ qmem_free(pf->dev, pf->ipsec.inb_sa);
}
EXPORT_SYMBOL(cn10k_ipsec_clean);

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.h b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.h
index 9965df0faa3e..6dd6ead0b28b 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.h
@@ -52,10 +52,14 @@ DECLARE_STATIC_KEY_FALSE(cn10k_ipsec_sa_enabled);
#define CN10K_CPT_LF_NQX(a) (CPT_LFBASE | 0x400 | (a) << 3)
#define CN10K_CPT_LF_CTX_FLUSH (CPT_LFBASE | 0x510)

+/* Inbound SA*/
+#define CN10K_IPSEC_INB_MAX_SA 128
+
/* IPSEC Instruction opcodes */
#define CN10K_IPSEC_MAJOR_OP_WRITE_SA 0x01UL
#define CN10K_IPSEC_MINOR_OP_WRITE_SA 0x09UL
#define CN10K_IPSEC_MAJOR_OP_OUTB_IPSEC 0x2AUL
+#define CN10K_IPSEC_MAJOR_OP_INB_IPSEC 0x29UL

enum cn10k_cpt_comp_e {
CN10K_CPT_COMP_E_NOTDONE = 0x00,
@@ -81,6 +85,19 @@ enum cn10k_cpt_hw_state_e {
CN10K_CPT_HW_IN_USE
};

+struct cn10k_inb_sw_ctx_info {
+ struct list_head list;
+ struct cn10k_rx_sa_s *sa_entry;
+ struct xfrm_state *x_state;
+ dma_addr_t sa_iova;
+ u32 npc_mcam_entry;
+ u32 sa_index;
+ u32 spi;
+ u16 hash_index; /* Hash index from SPI_TO_SA match */
+ u8 way; /* SPI_TO_SA match table way index */
+ bool delete_npc_and_match_entry;
+};
+
struct cn10k_ipsec {
/* Outbound CPT */
u64 io_addr;
@@ -92,6 +109,12 @@ struct cn10k_ipsec {
u32 outb_sa_count;
struct work_struct sa_work;
struct workqueue_struct *sa_workq;
+
+ /* For Inbound Inline IPSec flows */
+ u32 sa_tbl_entry_sz;
+ struct qmem *inb_sa;
+ struct list_head inb_sw_ctx_list;
+ DECLARE_BITMAP(inb_sa_table, CN10K_IPSEC_INB_MAX_SA);
};

/* CN10K IPSEC Security Association (SA) */
@@ -146,6 +169,76 @@ struct cn10k_tx_sa_s {
u64 hw_ctx[6]; /* W31 - W36 */
};

+struct cn10k_rx_sa_s {
+ u64 inb_ar_win_sz : 3; /* W0 */
+ u64 hard_life_dec : 1;
+ u64 soft_life_dec : 1;
+ u64 count_glb_octets : 1;
+ u64 count_glb_pkts : 1;
+ u64 count_mib_bytes : 1;
+ u64 count_mib_pkts : 1;
+ u64 hw_ctx_off : 7;
+ u64 ctx_id : 16;
+ u64 orig_pkt_fabs : 1;
+ u64 orig_pkt_free : 1;
+ u64 pkind : 6;
+ u64 rsvd_w0_40 : 1;
+ u64 eth_ovrwr : 1;
+ u64 pkt_output : 2;
+ u64 pkt_format : 1;
+ u64 defrag_opt : 2;
+ u64 x2p_dst : 1;
+ u64 ctx_push_size : 7;
+ u64 rsvd_w0_55 : 1;
+ u64 ctx_hdr_size : 2;
+ u64 aop_valid : 1;
+ u64 rsvd_w0_59 : 1;
+ u64 ctx_size : 4;
+
+ u64 rsvd_w1_31_0 : 32; /* W1 */
+ u64 cookie : 32;
+
+ u64 sa_valid : 1; /* W2 Control Word */
+ u64 sa_dir : 1;
+ u64 rsvd_w2_2_3 : 2;
+ u64 ipsec_mode : 1;
+ u64 ipsec_protocol : 1;
+ u64 aes_key_len : 2;
+ u64 enc_type : 3;
+ u64 life_unit : 1;
+ u64 auth_type : 4;
+ u64 encap_type : 2;
+ u64 et_ovrwr_ddr_en : 1;
+ u64 esn_en : 1;
+ u64 tport_l4_incr_csum : 1;
+ u64 iphdr_verify : 2;
+ u64 udp_ports_verify : 1;
+ u64 l2_l3_hdr_on_error : 1;
+ u64 rsvd_w25_31 : 7;
+ u64 spi : 32;
+
+ u64 w3; /* W3 */
+
+ u8 cipher_key[32]; /* W4 - W7 */
+ u32 rsvd_w8_0_31; /* W8 : IV */
+ u32 iv_gcm_salt;
+ u64 rsvd_w9; /* W9 */
+ u64 rsvd_w10; /* W10 : UDP Encap */
+ u32 dest_ipaddr; /* W11 - Tunnel mode: outer src and dest ipaddr */
+ u32 src_ipaddr;
+ u64 rsvd_w12_w30[19]; /* W12 - W30 */
+
+ u64 ar_base; /* W31 */
+ u64 ar_valid_mask; /* W32 */
+ u64 hard_sa_life; /* W33 */
+ u64 soft_sa_life; /* W34 */
+ u64 mib_octs; /* W35 */
+ u64 mib_pkts; /* W36 */
+ u64 ar_winbits; /* W37 */
+
+ u64 rsvd_w38_w100[63];
+};
+
/* CPT instruction parameter-1 */
#define CN10K_IPSEC_INST_PARAM1_DIS_L4_CSUM 0x1
#define CN10K_IPSEC_INST_PARAM1_DIS_L3_CSUM 0x2
--
2.43.0