octeontx2-af: NIX block LF initialization

Upon receiving NIX_LF_ALLOC mbox message allocate memory for
NIXLF's CQ, SQ, RQ, CINT, QINT and RSS HW contexts and configure
respective base iova HW. Enable caching of contexts into NIX NDC.

Return SQ buffer (SQB) size, this PF/VF MAC address etc info
e.t.c to the mbox msg sender.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -131,4 +131,14 @@ struct npa_aq_pool_res {
 	struct	npa_pool_s	pool_ctx;
 	struct	npa_pool_s	ctx_mask;
 };
+
+/* RSS info */
+#define MAX_RSS_GROUPS			8
+/* Group 0 has to be used in default pkt forwarding MCAM entries
+ * reserved for NIXLFs. Groups 1-7 can be used for RSS for ntuple
+ * filters.
+ */
+#define DEFAULT_RSS_CONTEXT_GROUP	0
+#define MAX_RSS_INDIR_TBL_SIZE		256 /* 1 << Max adder bits */
+
 #endif /* COMMON_H */

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

@@ -148,6 +148,8 @@ M(NPA_HWCTX_DISABLE,	0x403, hwctx_disable_req, msg_rsp)		\
 /* CPT mbox IDs (range 0xA00 - 0xBFF) */				\
 /* NPC mbox IDs (range 0x6000 - 0x7FFF) */				\
 /* NIX mbox IDs (range 0x8000 - 0xFFFF) */				\
+M(NIX_LF_ALLOC,		0x8000, nix_lf_alloc_req, nix_lf_alloc_rsp)	\
+M(NIX_LF_FREE,		0x8001, msg_req, msg_rsp)
 
 /* Messages initiated by AF (range 0xC00 - 0xDFF) */
 #define MBOX_UP_CGX_MESSAGES						\
@@ -162,6 +164,8 @@ MBOX_UP_CGX_MESSAGES
 
 /* Mailbox message formats */
 
+#define RVU_DEFAULT_PF_FUNC     0xFFFF
+
 /* Generic request msg used for those mbox messages which
  * don't send any data in the request.
  */
@@ -332,4 +336,45 @@ struct hwctx_disable_req {
 	u8 ctype;
 };
 
+/* NIX mailbox error codes
+ * Range 401 - 500.
+ */
+enum nix_af_status {
+	NIX_AF_ERR_PARAM            = -401,
+	NIX_AF_ERR_AQ_FULL          = -402,
+	NIX_AF_ERR_AQ_ENQUEUE       = -403,
+	NIX_AF_ERR_AF_LF_INVALID    = -404,
+	NIX_AF_ERR_AF_LF_ALLOC      = -405,
+	NIX_AF_ERR_TLX_ALLOC_FAIL   = -406,
+	NIX_AF_ERR_TLX_INVALID      = -407,
+	NIX_AF_ERR_RSS_SIZE_INVALID = -408,
+	NIX_AF_ERR_RSS_GRPS_INVALID = -409,
+	NIX_AF_ERR_FRS_INVALID      = -410,
+	NIX_AF_ERR_RX_LINK_INVALID  = -411,
+	NIX_AF_INVAL_TXSCHQ_CFG     = -412,
+	NIX_AF_SMQ_FLUSH_FAILED     = -413,
+	NIX_AF_ERR_LF_RESET         = -414,
+};
+
+/* For NIX LF context alloc and init */
+struct nix_lf_alloc_req {
+	struct mbox_msghdr hdr;
+	int node;
+	u32 rq_cnt;   /* No of receive queues */
+	u32 sq_cnt;   /* No of send queues */
+	u32 cq_cnt;   /* No of completion queues */
+	u8  xqe_sz;
+	u16 rss_sz;
+	u8  rss_grps;
+	u16 npa_func;
+	u16 sso_func;
+	u64 rx_cfg;   /* See NIX_AF_LF(0..127)_RX_CFG */
+};
+
+struct nix_lf_alloc_rsp {
+	struct mbox_msghdr hdr;
+	u16	sqb_size;
+	u8      mac_addr[ETH_ALEN];
+};
+
 #endif /* MBOX_H */

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

@@ -79,6 +79,16 @@ struct rvu_pfvf {
 	struct qmem	*npa_qints_ctx;
 	unsigned long	*aura_bmap;
 	unsigned long	*pool_bmap;
+
+	/* NIX contexts */
+	struct qmem	*rq_ctx;
+	struct qmem	*sq_ctx;
+	struct qmem	*cq_ctx;
+	struct qmem	*rss_ctx;
+	struct qmem	*cq_ints_ctx;
+	struct qmem	*nix_qints_ctx;
+
+	u8		mac_addr[ETH_ALEN]; /* MAC address of this PF/VF */
 };
 
 struct rvu_hwinfo {
@@ -230,4 +240,9 @@ int rvu_mbox_handler_NPA_LF_FREE(struct rvu *rvu, struct msg_req *req,
 /* NIX APIs */
 int rvu_nix_init(struct rvu *rvu);
 void rvu_nix_freemem(struct rvu *rvu);
+int rvu_mbox_handler_NIX_LF_ALLOC(struct rvu *rvu,
+				  struct nix_lf_alloc_req *req,
+				  struct nix_lf_alloc_rsp *rsp);
+int rvu_mbox_handler_NIX_LF_FREE(struct rvu *rvu, struct msg_req *req,
+				 struct msg_rsp *rsp);
 #endif /* RVU_H */

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

@@ -16,6 +16,244 @@
 #include "rvu.h"
 #include "cgx.h"
 
+static void nix_ctx_free(struct rvu *rvu, struct rvu_pfvf *pfvf)
+{
+	if (pfvf->rq_ctx)
+		qmem_free(rvu->dev, pfvf->rq_ctx);
+	if (pfvf->sq_ctx)
+		qmem_free(rvu->dev, pfvf->sq_ctx);
+	if (pfvf->cq_ctx)
+		qmem_free(rvu->dev, pfvf->cq_ctx);
+	if (pfvf->rss_ctx)
+		qmem_free(rvu->dev, pfvf->rss_ctx);
+	if (pfvf->nix_qints_ctx)
+		qmem_free(rvu->dev, pfvf->nix_qints_ctx);
+	if (pfvf->cq_ints_ctx)
+		qmem_free(rvu->dev, pfvf->cq_ints_ctx);
+
+	pfvf->rq_ctx = NULL;
+	pfvf->sq_ctx = NULL;
+	pfvf->cq_ctx = NULL;
+	pfvf->rss_ctx = NULL;
+	pfvf->nix_qints_ctx = NULL;
+	pfvf->cq_ints_ctx = NULL;
+}
+
+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 err, grp, num_indices;
+
+	/* RSS is not requested for this NIXLF */
+	if (!rss_sz)
+		return 0;
+	num_indices = rss_sz * rss_grps;
+
+	/* Alloc NIX RSS HW context memory and config the base */
+	err = qmem_alloc(rvu->dev, &pfvf->rss_ctx, num_indices, hwctx_size);
+	if (err)
+		return err;
+
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RSS_BASE(nixlf),
+		    (u64)pfvf->rss_ctx->iova);
+
+	/* 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));
+	/* Config RSS group offset and sizes */
+	for (grp = 0; grp < rss_grps; grp++)
+		rvu_write64(rvu, blkaddr, NIX_AF_LFX_RSS_GRPX(nixlf, grp),
+			    ((ilog2(rss_sz) - 1) << 16) | (rss_sz * grp));
+	return 0;
+}
+
+int rvu_mbox_handler_NIX_LF_ALLOC(struct rvu *rvu,
+				  struct nix_lf_alloc_req *req,
+				  struct nix_lf_alloc_rsp *rsp)
+{
+	int nixlf, qints, hwctx_size, err, rc = 0;
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	struct rvu_block *block;
+	struct rvu_pfvf *pfvf;
+	u64 cfg, ctx_cfg;
+	int blkaddr;
+
+	if (!req->rq_cnt || !req->sq_cnt || !req->cq_cnt)
+		return NIX_AF_ERR_PARAM;
+
+	pfvf = rvu_get_pfvf(rvu, pcifunc);
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	if (!pfvf->nixlf || blkaddr < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	block = &hw->block[blkaddr];
+	nixlf = rvu_get_lf(rvu, block, pcifunc, 0);
+	if (nixlf < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	/* If RSS is being enabled, check if requested config is valid.
+	 * RSS table size should be power of two, otherwise
+	 * RSS_GRP::OFFSET + adder might go beyond that group or
+	 * won't be able to use entire table.
+	 */
+	if (req->rss_sz && (req->rss_sz > MAX_RSS_INDIR_TBL_SIZE ||
+			    !is_power_of_2(req->rss_sz)))
+		return NIX_AF_ERR_RSS_SIZE_INVALID;
+
+	if (req->rss_sz &&
+	    (!req->rss_grps || req->rss_grps > MAX_RSS_GROUPS))
+		return NIX_AF_ERR_RSS_GRPS_INVALID;
+
+	/* Reset this NIX LF */
+	err = rvu_lf_reset(rvu, block, nixlf);
+	if (err) {
+		dev_err(rvu->dev, "Failed to reset NIX%d LF%d\n",
+			block->addr - BLKADDR_NIX0, nixlf);
+		return NIX_AF_ERR_LF_RESET;
+	}
+
+	ctx_cfg = rvu_read64(rvu, blkaddr, NIX_AF_CONST3);
+
+	/* Alloc NIX RQ HW context memory and config the base */
+	hwctx_size = 1UL << ((ctx_cfg >> 4) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->rq_ctx, req->rq_cnt, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RQS_BASE(nixlf),
+		    (u64)pfvf->rq_ctx->iova);
+
+	/* Set caching and queue count in HW */
+	cfg = BIT_ULL(36) | (req->rq_cnt - 1);
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RQS_CFG(nixlf), cfg);
+
+	/* Alloc NIX SQ HW context memory and config the base */
+	hwctx_size = 1UL << (ctx_cfg & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->sq_ctx, req->sq_cnt, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_SQS_BASE(nixlf),
+		    (u64)pfvf->sq_ctx->iova);
+	cfg = BIT_ULL(36) | (req->sq_cnt - 1);
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_SQS_CFG(nixlf), cfg);
+
+	/* Alloc NIX CQ HW context memory and config the base */
+	hwctx_size = 1UL << ((ctx_cfg >> 8) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->cq_ctx, req->cq_cnt, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CQS_BASE(nixlf),
+		    (u64)pfvf->cq_ctx->iova);
+	cfg = BIT_ULL(36) | (req->cq_cnt - 1);
+	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);
+	if (err)
+		goto free_mem;
+
+	/* Alloc memory for CQINT's HW contexts */
+	cfg = rvu_read64(rvu, blkaddr, NIX_AF_CONST2);
+	qints = (cfg >> 24) & 0xFFF;
+	hwctx_size = 1UL << ((ctx_cfg >> 24) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->cq_ints_ctx, qints, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	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));
+
+	/* Alloc memory for QINT's HW contexts */
+	cfg = rvu_read64(rvu, blkaddr, NIX_AF_CONST2);
+	qints = (cfg >> 12) & 0xFFF;
+	hwctx_size = 1UL << ((ctx_cfg >> 20) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->nix_qints_ctx, qints, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	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));
+
+	/* Enable LMTST for this NIX LF */
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_TX_CFG2(nixlf), BIT_ULL(0));
+
+	/* Set CQE/WQE size, NPA_PF_FUNC for SQBs and also SSO_PF_FUNC
+	 * If requester has sent a 'RVU_DEFAULT_PF_FUNC' use this NIX LF's
+	 * PCIFUNC itself.
+	 */
+	if (req->npa_func == RVU_DEFAULT_PF_FUNC)
+		cfg = pcifunc;
+	else
+		cfg = req->npa_func;
+
+	if (req->sso_func == RVU_DEFAULT_PF_FUNC)
+		cfg |= (u64)pcifunc << 16;
+	else
+		cfg |= (u64)req->sso_func << 16;
+
+	cfg |= (u64)req->xqe_sz << 33;
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_CFG(nixlf), cfg);
+
+	/* Config Rx pkt length, csum checks and apad  enable / disable */
+	rvu_write64(rvu, blkaddr, NIX_AF_LFX_RX_CFG(nixlf), req->rx_cfg);
+
+	goto exit;
+
+free_mem:
+	nix_ctx_free(rvu, pfvf);
+	rc = -ENOMEM;
+
+exit:
+	/* Set macaddr of this PF/VF */
+	ether_addr_copy(rsp->mac_addr, pfvf->mac_addr);
+
+	/* set SQB size info */
+	cfg = rvu_read64(rvu, blkaddr, NIX_AF_SQ_CONST);
+	rsp->sqb_size = (cfg >> 34) & 0xFFFF;
+	return rc;
+}
+
+int rvu_mbox_handler_NIX_LF_FREE(struct rvu *rvu, struct msg_req *req,
+				 struct msg_rsp *rsp)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	struct rvu_block *block;
+	int blkaddr, nixlf, err;
+	struct rvu_pfvf *pfvf;
+
+	pfvf = rvu_get_pfvf(rvu, pcifunc);
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	if (!pfvf->nixlf || blkaddr < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	block = &hw->block[blkaddr];
+	nixlf = rvu_get_lf(rvu, block, pcifunc, 0);
+	if (nixlf < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	/* Reset this NIX LF */
+	err = rvu_lf_reset(rvu, block, nixlf);
+	if (err) {
+		dev_err(rvu->dev, "Failed to reset NIX%d LF%d\n",
+			block->addr - BLKADDR_NIX0, nixlf);
+		return NIX_AF_ERR_LF_RESET;
+	}
+
+	nix_ctx_free(rvu, pfvf);
+
+	return 0;
+}
+
 static int nix_calibrate_x2p(struct rvu *rvu, int blkaddr)
 {
 	int idx, err;