octeontx2-af: Support configurable NDC cache way_mask

Each of the NIX/NPA LFs can choose which ways of their respective
NDC caches should be used to cache their contexts. This enables
flexible configurations like disabling caching for a LF, limiting
it's context to a certain set of ways etc etc. Separate way_mask
for NIX-TX and NIX-RX is not supported.
Signed-off-by: NGeetha sowjanya <gakula@marvell.com>
Signed-off-by: NSunil Goutham <sgoutham@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/mbox.h

@@ -361,6 +361,7 @@ struct npa_lf_alloc_req {
 	int node;
 	int aura_sz;  /* No of auras */
 	u32 nr_pools; /* No of pools */
+	u64 way_mask;
 };
 
 struct npa_lf_alloc_rsp {
@@ -451,6 +452,7 @@ struct nix_lf_alloc_req {
 	u16 npa_func;
 	u16 sso_func;
 	u64 rx_cfg;   /* See NIX_AF_LF(0..127)_RX_CFG */
+	u64 way_mask;
 };
 
 struct nix_lf_alloc_rsp {

drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c

@@ -378,7 +378,8 @@ static void nix_ctx_free(struct rvu *rvu, struct rvu_pfvf *pfvf)
 
 static int nixlf_rss_ctx_init(struct rvu *rvu, int blkaddr,
 			      struct rvu_pfvf *pfvf, int nixlf,
-			      int rss_sz, int rss_grps, int hwctx_size)
+			      int rss_sz, int rss_grps, int hwctx_size,
+			      u64 way_mask)
 {
 	int err, grp, num_indices;
 
@@ -398,7 +399,8 @@ static int nixlf_rss_ctx_init(struct rvu *rvu, int blkaddr,
 	/* Config full RSS table size, enable RSS and caching */
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RSS_CFG(nixlf),
 		    BIT_ULL(36) | BIT_ULL(4) |
-		    ilog2(num_indices / MAX_RSS_INDIR_TBL_SIZE));
+		    ilog2(num_indices / MAX_RSS_INDIR_TBL_SIZE) |
+		    way_mask << 20);
 	/* Config RSS group offset and sizes */
 	for (grp = 0; grp < rss_grps; grp++)
 		rvu_write64(rvu, blkaddr, NIX_AF_LFX_RSS_GRPX(nixlf, grp),
@@ -741,6 +743,9 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 	if (!req->rq_cnt || !req->sq_cnt || !req->cq_cnt)
 		return NIX_AF_ERR_PARAM;
 
+	if (req->way_mask)
+		req->way_mask &= 0xFFFF;
+
 	pfvf = rvu_get_pfvf(rvu, pcifunc);
 	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
 	if (!pfvf->nixlf || blkaddr < 0)
@@ -806,7 +811,7 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 		    (u64)pfvf->rq_ctx->iova);
 
 	/* Set caching and queue count in HW */
-	cfg = BIT_ULL(36) | (req->rq_cnt - 1);
+	cfg = BIT_ULL(36) | (req->rq_cnt - 1) | req->way_mask << 20;
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RQS_CFG(nixlf), cfg);
 
 	/* Alloc NIX SQ HW context memory and config the base */
@@ -821,7 +826,8 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_SQS_BASE(nixlf),
 		    (u64)pfvf->sq_ctx->iova);
-	cfg = BIT_ULL(36) | (req->sq_cnt - 1);
+
+	cfg = BIT_ULL(36) | (req->sq_cnt - 1) | req->way_mask << 20;
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_SQS_CFG(nixlf), cfg);
 
 	/* Alloc NIX CQ HW context memory and config the base */
@@ -836,13 +842,14 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CQS_BASE(nixlf),
 		    (u64)pfvf->cq_ctx->iova);
-	cfg = BIT_ULL(36) | (req->cq_cnt - 1);
+
+	cfg = BIT_ULL(36) | (req->cq_cnt - 1) | req->way_mask << 20;
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CQS_CFG(nixlf), cfg);
 
 	/* Initialize receive side scaling (RSS) */
 	hwctx_size = 1UL << ((ctx_cfg >> 12) & 0xF);
-	err = nixlf_rss_ctx_init(rvu, blkaddr, pfvf, nixlf,
-				 req->rss_sz, req->rss_grps, hwctx_size);
+	err = nixlf_rss_ctx_init(rvu, blkaddr, pfvf, nixlf, req->rss_sz,
+				 req->rss_grps, hwctx_size, req->way_mask);
 	if (err)
 		goto free_mem;
 
@@ -856,7 +863,9 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CINTS_BASE(nixlf),
 		    (u64)pfvf->cq_ints_ctx->iova);
-	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CINTS_CFG(nixlf), BIT_ULL(36));
+
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CINTS_CFG(nixlf),
+		    BIT_ULL(36) | req->way_mask << 20);
 
 	/* Alloc memory for QINT's HW contexts */
 	cfg = rvu_read64(rvu, blkaddr, NIX_AF_CONST2);
@@ -868,7 +877,8 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
 
 	rvu_write64(rvu, blkaddr, NIX_AF_LFX_QINTS_BASE(nixlf),
 		    (u64)pfvf->nix_qints_ctx->iova);
-	rvu_write64(rvu, blkaddr, NIX_AF_LFX_QINTS_CFG(nixlf), BIT_ULL(36));
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_QINTS_CFG(nixlf),
+		    BIT_ULL(36) | req->way_mask << 20);
 
 	/* Setup VLANX TPID's.
 	 * Use VLAN1 for 802.1Q

drivers/net/ethernet/marvell/octeontx2/af/rvu_npa.c

@@ -289,6 +289,9 @@ int rvu_mbox_handler_npa_lf_alloc(struct rvu *rvu,
 	    req->aura_sz == NPA_AURA_SZ_0 || !req->nr_pools)
 		return NPA_AF_ERR_PARAM;
 
+	if (req->way_mask)
+		req->way_mask &= 0xFFFF;
+
 	pfvf = rvu_get_pfvf(rvu, pcifunc);
 	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPA, pcifunc);
 	if (!pfvf->npalf || blkaddr < 0)
@@ -345,7 +348,8 @@ int rvu_mbox_handler_npa_lf_alloc(struct rvu *rvu,
 	/* Clear way partition mask and set aura offset to '0' */
 	cfg &= ~(BIT_ULL(34) - 1);
 	/* Set aura size & enable caching of contexts */
-	cfg |= (req->aura_sz << 16) | BIT_ULL(34);
+	cfg |= (req->aura_sz << 16) | BIT_ULL(34) | req->way_mask;
+
 	rvu_write64(rvu, blkaddr, NPA_AF_LFX_AURAS_CFG(npalf), cfg);
 
 	/* Configure aura HW context's base */
@@ -353,7 +357,8 @@ int rvu_mbox_handler_npa_lf_alloc(struct rvu *rvu,
 		    (u64)pfvf->aura_ctx->iova);
 
 	/* Enable caching of qints hw context */
-	rvu_write64(rvu, blkaddr, NPA_AF_LFX_QINTS_CFG(npalf), BIT_ULL(36));
+	rvu_write64(rvu, blkaddr, NPA_AF_LFX_QINTS_CFG(npalf),
+		    BIT_ULL(36) | req->way_mask << 20);
 	rvu_write64(rvu, blkaddr, NPA_AF_LFX_QINTS_BASE(npalf),
 		    (u64)pfvf->npa_qints_ctx->iova);