Message-ID: <20250502132005.611698-8-tanmay@marvell.com>
Date: Fri, 2 May 2025 18:49:48 +0530
From: Tanmay Jagdale <tanmay@...vell.com>
To: <bbrezillon@...nel.org>, <arno@...isbad.org>, <schalla@...vell.com>,
        <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <sgoutham@...vell.com>, <lcherian@...vell.com>, <gakula@...vell.com>,
        <jerinj@...vell.com>, <hkelam@...vell.com>, <sbhatta@...vell.com>,
        <andrew+netdev@...n.ch>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <bbhushan2@...vell.com>, <bhelgaas@...gle.com>,
        <pstanner@...hat.com>, <gregkh@...uxfoundation.org>,
        <peterz@...radead.org>, <linux@...blig.org>,
        <krzysztof.kozlowski@...aro.org>, <giovanni.cabiddu@...el.com>
CC: <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <netdev@...r.kernel.org>, <rkannoth@...vell.com>, <sumang@...vell.com>,
        <gcherian@...vell.com>, Kiran Kumar K <kirankumark@...vell.com>,
        "Nithin
 Dabilpuram" <ndabilpuram@...vell.com>,
        Tanmay Jagdale <tanmay@...vell.com>
Subject: [net-next PATCH v1 07/15] octeontx2-af: Add support for SPI to SA index translation

From: Kiran Kumar K <kirankumark@...vell.com>

In case of IPsec, the inbound SPI can be random. HW supports mapping
SPI to an arbitrary SA index. SPI to SA index is done using a lookup
in NPC cam entry with key as SPI, MATCH_ID, LFID. Adding Mbox API
changes to configure the match table.

Signed-off-by: Kiran Kumar K <kirankumark@...vell.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram@...vell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
Signed-off-by: Tanmay Jagdale <tanmay@...vell.com>
---
 .../ethernet/marvell/octeontx2/af/Makefile    |   2 +-
 .../net/ethernet/marvell/octeontx2/af/mbox.h  |  27 +++
 .../net/ethernet/marvell/octeontx2/af/rvu.c   |   4 +
 .../net/ethernet/marvell/octeontx2/af/rvu.h   |  13 ++
 .../ethernet/marvell/octeontx2/af/rvu_nix.c   |   6 +
 .../marvell/octeontx2/af/rvu_nix_spi.c        | 220 ++++++++++++++++++
 .../ethernet/marvell/octeontx2/af/rvu_reg.h   |   4 +
 7 files changed, 275 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix_spi.c

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/Makefile b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
index ccea37847df8..49318017f35f 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/Makefile
+++ b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_OCTEONTX2_MBOX) += rvu_mbox.o
 obj-$(CONFIG_OCTEONTX2_AF) += rvu_af.o
 
 rvu_mbox-y := mbox.o rvu_trace.o
-rvu_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o \
+rvu_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o rvu_nix_spi.o \
 		  rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o rvu_npc_fs.o \
 		  rvu_cpt.o rvu_devlink.o rpm.o rvu_cn10k.o rvu_switch.o \
 		  rvu_sdp.o rvu_npc_hash.o mcs.o mcs_rvu_if.o mcs_cnf10kb.o \
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 715efcc04c9e..5cebf10a15a7 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -326,6 +326,10 @@ M(NIX_READ_INLINE_IPSEC_CFG, 0x8023, nix_read_inline_ipsec_cfg,		\
 M(NIX_LF_INLINE_RQ_CFG, 0x8024, nix_lf_inline_rq_cfg,		\
 				nix_rq_cpt_field_mask_cfg_req,  \
 				msg_rsp)	\
+M(NIX_SPI_TO_SA_ADD,    0x8026, nix_spi_to_sa_add, nix_spi_to_sa_add_req,   \
+				nix_spi_to_sa_add_rsp)                      \
+M(NIX_SPI_TO_SA_DELETE, 0x8027, nix_spi_to_sa_delete, nix_spi_to_sa_delete_req,   \
+				msg_rsp)                                        \
 M(NIX_MCAST_GRP_CREATE,	0x802b, nix_mcast_grp_create, nix_mcast_grp_create_req,	\
 				nix_mcast_grp_create_rsp)			\
 M(NIX_MCAST_GRP_DESTROY, 0x802c, nix_mcast_grp_destroy, nix_mcast_grp_destroy_req,	\
@@ -880,6 +884,29 @@ enum nix_rx_vtag0_type {
 	NIX_AF_LFX_RX_VTAG_TYPE7,
 };
 
+/* For SPI to SA index add */
+struct nix_spi_to_sa_add_req {
+	struct mbox_msghdr hdr;
+	u32 sa_index;
+	u32 spi_index;
+	u16 match_id;
+	bool valid;
+};
+
+struct nix_spi_to_sa_add_rsp {
+	struct mbox_msghdr hdr;
+	u16 hash_index;
+	u8 way;
+	u8 is_duplicate;
+};
+
+/* To free SPI to SA index */
+struct nix_spi_to_sa_delete_req {
+	struct mbox_msghdr hdr;
+	u16 hash_index;
+	u8 way;
+};
+
 /* For NIX LF context alloc and init */
 struct nix_lf_alloc_req {
 	struct mbox_msghdr hdr;
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index ea346e59835b..2b7c09bb24e1 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -90,6 +90,9 @@ static void rvu_setup_hw_capabilities(struct rvu *rvu)
 
 	if (is_rvu_npc_hash_extract_en(rvu))
 		hw->cap.npc_hash_extract = true;
+
+	if (is_rvu_nix_spi_to_sa_en(rvu))
+		hw->cap.spi_to_sas = 0x2000;
 }
 
 /* Poll a RVU block's register 'offset', for a 'zero'
@@ -2723,6 +2726,7 @@ static void __rvu_flr_handler(struct rvu *rvu, u16 pcifunc)
 	rvu_blklf_teardown(rvu, pcifunc, BLKADDR_NPA);
 	rvu_reset_lmt_map_tbl(rvu, pcifunc);
 	rvu_detach_rsrcs(rvu, NULL, pcifunc);
+
 	/* In scenarios where PF/VF drivers detach NIXLF without freeing MCAM
 	 * entries, check and free the MCAM entries explicitly to avoid leak.
 	 * Since LF is detached use LF number as -1.
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index 71407f6318ec..42fc3e762bc0 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -395,6 +395,7 @@ struct hw_cap {
 	u16	nix_txsch_per_cgx_lmac; /* Max Q's transmitting to CGX LMAC */
 	u16	nix_txsch_per_lbk_lmac; /* Max Q's transmitting to LBK LMAC */
 	u16	nix_txsch_per_sdp_lmac; /* Max Q's transmitting to SDP LMAC */
+	u16     spi_to_sas; /* Num of SPI to SA index */
 	bool	nix_fixed_txschq_mapping; /* Schq mapping fixed or flexible */
 	bool	nix_shaping;		 /* Is shaping and coloring supported */
 	bool    nix_shaper_toggle_wait; /* Shaping toggle needs poll/wait */
@@ -800,6 +801,17 @@ static inline bool is_rvu_npc_hash_extract_en(struct rvu *rvu)
 	return true;
 }
 
+static inline bool is_rvu_nix_spi_to_sa_en(struct rvu *rvu)
+{
+	u64 nix_const2;
+
+	nix_const2 = rvu_read64(rvu, BLKADDR_NIX0, NIX_AF_CONST2);
+	if ((nix_const2 >> 48) & 0xffff)
+		return true;
+
+	return false;
+}
+
 static inline u16 rvu_nix_chan_cgx(struct rvu *rvu, u8 cgxid,
 				   u8 lmacid, u8 chan)
 {
@@ -992,6 +1004,7 @@ int nix_get_struct_ptrs(struct rvu *rvu, u16 pcifunc,
 			struct nix_hw **nix_hw, int *blkaddr);
 int rvu_nix_setup_ratelimit_aggr(struct rvu *rvu, u16 pcifunc,
 				 u16 rq_idx, u16 match_id);
+int rvu_nix_free_spi_to_sa_table(struct rvu *rvu, uint16_t pcifunc);
 int nix_aq_context_read(struct rvu *rvu, struct nix_hw *nix_hw,
 			struct nix_cn10k_aq_enq_req *aq_req,
 			struct nix_cn10k_aq_enq_rsp *aq_rsp,
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index b15fd331facf..68525bfc8e6d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -1751,6 +1751,9 @@ int rvu_mbox_handler_nix_lf_free(struct rvu *rvu, struct nix_lf_free_req *req,
 	else
 		rvu_npc_free_mcam_entries(rvu, pcifunc, nixlf);
 
+	/* Reset SPI to SA index table */
+	rvu_nix_free_spi_to_sa_table(rvu, pcifunc);
+
 	/* Free any tx vtag def entries used by this NIX LF */
 	if (!(req->flags & NIX_LF_DONT_FREE_TX_VTAG))
 		nix_free_tx_vtag_entries(rvu, pcifunc);
@@ -5312,6 +5315,9 @@ void rvu_nix_lf_teardown(struct rvu *rvu, u16 pcifunc, int blkaddr, int nixlf)
 	nix_rx_sync(rvu, blkaddr);
 	nix_txschq_free(rvu, pcifunc);
 
+	/* Reset SPI to SA index table */
+	rvu_nix_free_spi_to_sa_table(rvu, pcifunc);
+
 	clear_bit(NIXLF_INITIALIZED, &pfvf->flags);
 
 	if (is_pf_cgxmapped(rvu, pf) && rvu->rep_mode)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix_spi.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix_spi.c
new file mode 100644
index 000000000000..b8acc23a47bc
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix_spi.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell RVU Admin Function driver
+ *
+ * Copyright (C) 2022 Marvell.
+ *
+ */
+
+#include "rvu.h"
+
+static bool nix_spi_to_sa_index_check_duplicate(struct rvu *rvu,
+						struct nix_spi_to_sa_add_req *req,
+						struct nix_spi_to_sa_add_rsp *rsp,
+						int blkaddr, int16_t index, u8 way,
+						bool *is_valid, int lfidx)
+{
+	u32 spi_index;
+	u16 match_id;
+	bool valid;
+	u8 lfid;
+	u64 wkey;
+
+	wkey = rvu_read64(rvu, blkaddr, NIX_AF_SPI_TO_SA_KEYX_WAYX(index, way));
+	spi_index = (wkey & 0xFFFFFFFF);
+	match_id = ((wkey >> 32) & 0xFFFF);
+	lfid = ((wkey >> 48) & 0x7f);
+	valid = ((wkey >> 55) & 0x1);
+
+	*is_valid = valid;
+	if (!valid)
+		return 0;
+
+	if (req->spi_index == spi_index && req->match_id == match_id &&
+	    lfidx == lfid) {
+		rsp->hash_index = index;
+		rsp->way = way;
+		rsp->is_duplicate = true;
+		return 1;
+	}
+	return 0;
+}
+
+static void  nix_spi_to_sa_index_table_update(struct rvu *rvu,
+					      struct nix_spi_to_sa_add_req *req,
+					      struct nix_spi_to_sa_add_rsp *rsp,
+					      int blkaddr, int16_t index, u8 way,
+					      int lfidx)
+{
+	u64 wvalue;
+	u64 wkey;
+
+	wkey = (req->spi_index | ((u64)req->match_id << 32) |
+		(((u64)lfidx) << 48) | ((u64)req->valid << 55));
+	rvu_write64(rvu, blkaddr, NIX_AF_SPI_TO_SA_KEYX_WAYX(index, way),
+		    wkey);
+	wvalue = (req->sa_index & 0xFFFFFFFF);
+	rvu_write64(rvu, blkaddr, NIX_AF_SPI_TO_SA_VALUEX_WAYX(index, way),
+		    wvalue);
+	rsp->hash_index = index;
+	rsp->way = way;
+	rsp->is_duplicate = false;
+}
+
+int rvu_mbox_handler_nix_spi_to_sa_delete(struct rvu *rvu,
+					  struct nix_spi_to_sa_delete_req *req,
+					  struct msg_rsp *rsp)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	int lfidx, lfid;
+	int blkaddr;
+	u64 wvalue;
+	u64 wkey;
+	int ret = 0;
+
+	if (!hw->cap.spi_to_sas)
+		return NIX_AF_ERR_PARAM;
+
+	if (!is_nixlf_attached(rvu, pcifunc)) {
+		ret = NIX_AF_ERR_AF_LF_INVALID;
+		goto exit;
+	}
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	lfidx = rvu_get_lf(rvu, &hw->block[blkaddr], pcifunc, 0);
+	if (lfidx < 0) {
+		ret = NIX_AF_ERR_AF_LF_INVALID;
+		goto exit;
+	}
+
+	mutex_lock(&rvu->rsrc_lock);
+
+	wkey = rvu_read64(rvu, blkaddr,
+			  NIX_AF_SPI_TO_SA_KEYX_WAYX(req->hash_index, req->way));
+	lfid = ((wkey >> 48) & 0x7f);
+	if (lfid != lfidx) {
+		ret = NIX_AF_ERR_AF_LF_INVALID;
+		goto unlock;
+	}
+
+	wkey = 0;
+	rvu_write64(rvu, blkaddr,
+		    NIX_AF_SPI_TO_SA_KEYX_WAYX(req->hash_index, req->way), wkey);
+	wvalue = 0;
+	rvu_write64(rvu, blkaddr,
+		    NIX_AF_SPI_TO_SA_VALUEX_WAYX(req->hash_index, req->way), wvalue);
+unlock:
+	mutex_unlock(&rvu->rsrc_lock);
+exit:
+	return ret;
+}
+
+int rvu_mbox_handler_nix_spi_to_sa_add(struct rvu *rvu,
+				       struct nix_spi_to_sa_add_req *req,
+				       struct nix_spi_to_sa_add_rsp *rsp)
+{
+	u16 way0_index, way1_index, way2_index, way3_index;
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	bool way0, way1, way2, way3;
+	int ret = 0;
+	int blkaddr;
+	int lfidx;
+	u64 value;
+	u64 key;
+
+	if (!hw->cap.spi_to_sas)
+		return NIX_AF_ERR_PARAM;
+
+	if (!is_nixlf_attached(rvu, pcifunc)) {
+		ret = NIX_AF_ERR_AF_LF_INVALID;
+		goto exit;
+	}
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	lfidx = rvu_get_lf(rvu, &hw->block[blkaddr], pcifunc, 0);
+	if (lfidx < 0) {
+		ret = NIX_AF_ERR_AF_LF_INVALID;
+		goto exit;
+	}
+
+	mutex_lock(&rvu->rsrc_lock);
+
+	key = (((u64)lfidx << 48) | ((u64)req->match_id << 32) | req->spi_index);
+	rvu_write64(rvu, blkaddr, NIX_AF_SPI_TO_SA_HASH_KEY, key);
+	value = rvu_read64(rvu, blkaddr, NIX_AF_SPI_TO_SA_HASH_VALUE);
+	way0_index = (value & 0x7ff);
+	way1_index = ((value >> 16) & 0x7ff);
+	way2_index = ((value >> 32) & 0x7ff);
+	way3_index = ((value >> 48) & 0x7ff);
+
+	/* Check for duplicate entry */
+	if (nix_spi_to_sa_index_check_duplicate(rvu, req, rsp, blkaddr,
+						way0_index, 0, &way0, lfidx) ||
+	    nix_spi_to_sa_index_check_duplicate(rvu, req, rsp, blkaddr,
+						way1_index, 1, &way1, lfidx) ||
+	    nix_spi_to_sa_index_check_duplicate(rvu, req, rsp, blkaddr,
+						way2_index, 2, &way2, lfidx) ||
+	    nix_spi_to_sa_index_check_duplicate(rvu, req, rsp, blkaddr,
+						way3_index, 3, &way3, lfidx)) {
+		ret = 0;
+		goto unlock;
+	}
+
+	/* If not present, update first available way with index */
+	if (!way0)
+		nix_spi_to_sa_index_table_update(rvu, req, rsp, blkaddr,
+						 way0_index, 0, lfidx);
+	else if (!way1)
+		nix_spi_to_sa_index_table_update(rvu, req, rsp, blkaddr,
+						 way1_index, 1, lfidx);
+	else if (!way2)
+		nix_spi_to_sa_index_table_update(rvu, req, rsp, blkaddr,
+						 way2_index, 2, lfidx);
+	else if (!way3)
+		nix_spi_to_sa_index_table_update(rvu, req, rsp, blkaddr,
+						 way3_index, 3, lfidx);
+unlock:
+	mutex_unlock(&rvu->rsrc_lock);
+exit:
+	return ret;
+}
+
+int rvu_nix_free_spi_to_sa_table(struct rvu *rvu, uint16_t pcifunc)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	int lfidx, lfid;
+	int index, way;
+	u64 value, key;
+	int blkaddr;
+
+	if (!hw->cap.spi_to_sas)
+		return 0;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	lfidx = rvu_get_lf(rvu, &hw->block[blkaddr], pcifunc, 0);
+	if (lfidx < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	mutex_lock(&rvu->rsrc_lock);
+	for (index = 0; index < hw->cap.spi_to_sas / 4; index++) {
+		for (way = 0; way < 4; way++) {
+			key = rvu_read64(rvu, blkaddr,
+					 NIX_AF_SPI_TO_SA_KEYX_WAYX(index, way));
+			lfid = ((key >> 48) & 0x7f);
+			if (lfid == lfidx) {
+				key = 0;
+				rvu_write64(rvu, blkaddr,
+					    NIX_AF_SPI_TO_SA_KEYX_WAYX(index, way),
+					    key);
+				value = 0;
+				rvu_write64(rvu, blkaddr,
+					    NIX_AF_SPI_TO_SA_VALUEX_WAYX(index, way),
+					    value);
+			}
+		}
+	}
+	mutex_unlock(&rvu->rsrc_lock);
+
+	return 0;
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
index e5e005d5d71e..b64547fe4811 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
@@ -396,6 +396,10 @@
 #define NIX_AF_RX_CHANX_CFG(a)                  (0x1A30 | (a) << 15)
 #define NIX_AF_CINT_TIMERX(a)                   (0x1A40 | (a) << 18)
 #define NIX_AF_LSO_FORMATX_FIELDX(a, b)         (0x1B00 | (a) << 16 | (b) << 3)
+#define NIX_AF_SPI_TO_SA_KEYX_WAYX(a, b)        (0x1C00 | (a) << 16 | (b) << 3)
+#define NIX_AF_SPI_TO_SA_VALUEX_WAYX(a, b)      (0x1C40 | (a) << 16 | (b) << 3)
+#define NIX_AF_SPI_TO_SA_HASH_KEY               (0x1C90)
+#define NIX_AF_SPI_TO_SA_HASH_VALUE             (0x1CA0)
 #define NIX_AF_LFX_CFG(a)		(0x4000 | (a) << 17)
 #define NIX_AF_LFX_SQS_CFG(a)		(0x4020 | (a) << 17)
 #define NIX_AF_LFX_TX_CFG2(a)		(0x4028 | (a) << 17)
-- 
2.43.0

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