octeontx2-af: NPA block LF initialization

Upon receiving NPA_LF_ALLOC mbox message allocate memory for
NPALF's aura, pool and qint contexts and configure the same
to HW. Enable caching of contexts into NPA NDC.

Return pool related info like stack size, num pointers per
stack page 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

@@ -96,4 +96,26 @@ struct admin_queue {
 	spinlock_t	lock; /* Serialize inst enqueue from PFs */
 };
 
+/* NPA aura count */
+enum npa_aura_sz {
+	NPA_AURA_SZ_0,
+	NPA_AURA_SZ_128,
+	NPA_AURA_SZ_256,
+	NPA_AURA_SZ_512,
+	NPA_AURA_SZ_1K,
+	NPA_AURA_SZ_2K,
+	NPA_AURA_SZ_4K,
+	NPA_AURA_SZ_8K,
+	NPA_AURA_SZ_16K,
+	NPA_AURA_SZ_32K,
+	NPA_AURA_SZ_64K,
+	NPA_AURA_SZ_128K,
+	NPA_AURA_SZ_256K,
+	NPA_AURA_SZ_512K,
+	NPA_AURA_SZ_1M,
+	NPA_AURA_SZ_MAX,
+};
+
+#define NPA_AURA_COUNT(x)	(1ULL << ((x) + 6))
+
 #endif /* COMMON_H */

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

@@ -139,6 +139,8 @@ M(CGX_GET_LINKINFO,	0x209, msg_req, cgx_link_info_msg)		\
 M(CGX_INTLBK_ENABLE,	0x20A, msg_req, msg_rsp)			\
 M(CGX_INTLBK_DISABLE,	0x20B, msg_req, msg_rsp)			\
 /* NPA mbox IDs (range 0x400 - 0x5FF) */				\
+M(NPA_LF_ALLOC,		0x400, npa_lf_alloc_req, npa_lf_alloc_rsp)	\
+M(NPA_LF_FREE,		0x401, msg_req, msg_rsp)			\
 /* SSO/SSOW mbox IDs (range 0x600 - 0x7FF) */				\
 /* TIM mbox IDs (range 0x800 - 0x9FF) */				\
 /* CPT mbox IDs (range 0xA00 - 0xBFF) */				\
@@ -258,4 +260,34 @@ struct cgx_link_info_msg {
 	struct mbox_msghdr hdr;
 	struct cgx_link_user_info link_info;
 };
+
+/* NPA mbox message formats */
+
+/* NPA mailbox error codes
+ * Range 301 - 400.
+ */
+enum npa_af_status {
+	NPA_AF_ERR_PARAM            = -301,
+	NPA_AF_ERR_AQ_FULL          = -302,
+	NPA_AF_ERR_AQ_ENQUEUE       = -303,
+	NPA_AF_ERR_AF_LF_INVALID    = -304,
+	NPA_AF_ERR_AF_LF_ALLOC      = -305,
+	NPA_AF_ERR_LF_RESET         = -306,
+};
+
+/* For NPA LF context alloc and init */
+struct npa_lf_alloc_req {
+	struct mbox_msghdr hdr;
+	int node;
+	int aura_sz;  /* No of auras */
+	u32 nr_pools; /* No of pools */
+};
+
+struct npa_lf_alloc_rsp {
+	struct mbox_msghdr hdr;
+	u32 stack_pg_ptrs;  /* No of ptrs per stack page */
+	u32 stack_pg_bytes; /* Size of stack page */
+	u16 qints; /* NPA_AF_CONST::QINTS */
+};
+
 #endif /* MBOX_H */

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

@@ -361,6 +361,19 @@ static void rvu_check_block_implemented(struct rvu *rvu)
 	}
 }
 
+int rvu_lf_reset(struct rvu *rvu, struct rvu_block *block, int lf)
+{
+	int err;
+
+	if (!block->implemented)
+		return 0;
+
+	rvu_write64(rvu, block->addr, block->lfreset_reg, lf | BIT_ULL(12));
+	err = rvu_poll_reg(rvu, block->addr, block->lfreset_reg, BIT_ULL(12),
+			   true);
+	return err;
+}
+
 static void rvu_block_reset(struct rvu *rvu, int blkaddr, u64 rst_reg)
 {
 	struct rvu_block *block = &rvu->hw->block[blkaddr];

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

@@ -72,6 +72,11 @@ struct rvu_pfvf {
 	struct rsrc_bmap msix;      /* Bitmap for MSIX vector alloc */
 #define MSIX_BLKLF(blkaddr, lf) (((blkaddr) << 8) | ((lf) & 0xFF))
 	u16		 *msix_lfmap; /* Vector to block LF mapping */
+
+	/* NPA contexts */
+	struct qmem	*aura_ctx;
+	struct qmem	*pool_ctx;
+	struct qmem	*npa_qints_ctx;
 };
 
 struct rvu_hwinfo {
@@ -154,6 +159,7 @@ struct rvu_pfvf *rvu_get_pfvf(struct rvu *rvu, int pcifunc);
 void rvu_get_pf_numvfs(struct rvu *rvu, int pf, int *numvfs, int *hwvf);
 bool is_block_implemented(struct rvu_hwinfo *hw, int blkaddr);
 int rvu_get_lf(struct rvu *rvu, struct rvu_block *block, u16 pcifunc, u16 slot);
+int rvu_lf_reset(struct rvu *rvu, struct rvu_block *block, int lf);
 int rvu_get_blkaddr(struct rvu *rvu, int blktype, u16 pcifunc);
 int rvu_poll_reg(struct rvu *rvu, u64 block, u64 offset, u64 mask, bool zero);
 
@@ -206,5 +212,10 @@ int rvu_mbox_handler_CGX_INTLBK_DISABLE(struct rvu *rvu, struct msg_req *req,
 
 /* NPA APIs */
 int rvu_npa_init(struct rvu *rvu);
-int rvu_npa_freemem(struct rvu *rvu);
+void rvu_npa_freemem(struct rvu *rvu);
+int rvu_mbox_handler_NPA_LF_ALLOC(struct rvu *rvu,
+				  struct npa_lf_alloc_req *req,
+				  struct npa_lf_alloc_rsp *rsp);
+int rvu_mbox_handler_NPA_LF_FREE(struct rvu *rvu, struct msg_req *req,
+				 struct msg_rsp *rsp);
 #endif /* RVU_H */

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

@@ -15,6 +15,139 @@
 #include "rvu_reg.h"
 #include "rvu.h"
 
+static void npa_ctx_free(struct rvu *rvu, struct rvu_pfvf *pfvf)
+{
+	qmem_free(rvu->dev, pfvf->aura_ctx);
+	pfvf->aura_ctx = NULL;
+
+	qmem_free(rvu->dev, pfvf->pool_ctx);
+	pfvf->pool_ctx = NULL;
+
+	qmem_free(rvu->dev, pfvf->npa_qints_ctx);
+	pfvf->npa_qints_ctx = NULL;
+}
+
+int rvu_mbox_handler_NPA_LF_ALLOC(struct rvu *rvu,
+				  struct npa_lf_alloc_req *req,
+				  struct npa_lf_alloc_rsp *rsp)
+{
+	int npalf, 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->aura_sz > NPA_AURA_SZ_MAX ||
+	    req->aura_sz == NPA_AURA_SZ_0 || !req->nr_pools)
+		return NPA_AF_ERR_PARAM;
+
+	pfvf = rvu_get_pfvf(rvu, pcifunc);
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPA, pcifunc);
+	if (!pfvf->npalf || blkaddr < 0)
+		return NPA_AF_ERR_AF_LF_INVALID;
+
+	block = &hw->block[blkaddr];
+	npalf = rvu_get_lf(rvu, block, pcifunc, 0);
+	if (npalf < 0)
+		return NPA_AF_ERR_AF_LF_INVALID;
+
+	/* Reset this NPA LF */
+	err = rvu_lf_reset(rvu, block, npalf);
+	if (err) {
+		dev_err(rvu->dev, "Failed to reset NPALF%d\n", npalf);
+		return NPA_AF_ERR_LF_RESET;
+	}
+
+	ctx_cfg = rvu_read64(rvu, blkaddr, NPA_AF_CONST1);
+
+	/* Alloc memory for aura HW contexts */
+	hwctx_size = 1UL << (ctx_cfg & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->aura_ctx,
+			 NPA_AURA_COUNT(req->aura_sz), hwctx_size);
+	if (err)
+		goto free_mem;
+
+	/* Alloc memory for pool HW contexts */
+	hwctx_size = 1UL << ((ctx_cfg >> 4) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->pool_ctx, req->nr_pools, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	/* Get no of queue interrupts supported */
+	cfg = rvu_read64(rvu, blkaddr, NPA_AF_CONST);
+	qints = (cfg >> 28) & 0xFFF;
+
+	/* Alloc memory for Qints HW contexts */
+	hwctx_size = 1UL << ((ctx_cfg >> 8) & 0xF);
+	err = qmem_alloc(rvu->dev, &pfvf->npa_qints_ctx, qints, hwctx_size);
+	if (err)
+		goto free_mem;
+
+	cfg = rvu_read64(rvu, blkaddr, NPA_AF_LFX_AURAS_CFG(npalf));
+	/* 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);
+	rvu_write64(rvu, blkaddr, NPA_AF_LFX_AURAS_CFG(npalf), cfg);
+
+	/* Configure aura HW context's base */
+	rvu_write64(rvu, blkaddr, NPA_AF_LFX_LOC_AURAS_BASE(npalf),
+		    (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_BASE(npalf),
+		    (u64)pfvf->npa_qints_ctx->iova);
+
+	goto exit;
+
+free_mem:
+	npa_ctx_free(rvu, pfvf);
+	rc = -ENOMEM;
+
+exit:
+	/* set stack page info */
+	cfg = rvu_read64(rvu, blkaddr, NPA_AF_CONST);
+	rsp->stack_pg_ptrs = (cfg >> 8) & 0xFF;
+	rsp->stack_pg_bytes = cfg & 0xFF;
+	rsp->qints = (cfg >> 28) & 0xFFF;
+	return rc;
+}
+
+int rvu_mbox_handler_NPA_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;
+	struct rvu_pfvf *pfvf;
+	int npalf, err;
+	int blkaddr;
+
+	pfvf = rvu_get_pfvf(rvu, pcifunc);
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPA, pcifunc);
+	if (!pfvf->npalf || blkaddr < 0)
+		return NPA_AF_ERR_AF_LF_INVALID;
+
+	block = &hw->block[blkaddr];
+	npalf = rvu_get_lf(rvu, block, pcifunc, 0);
+	if (npalf < 0)
+		return NPA_AF_ERR_AF_LF_INVALID;
+
+	/* Reset this NPA LF */
+	err = rvu_lf_reset(rvu, block, npalf);
+	if (err) {
+		dev_err(rvu->dev, "Failed to reset NPALF%d\n", npalf);
+		return NPA_AF_ERR_LF_RESET;
+	}
+
+	npa_ctx_free(rvu, pfvf);
+
+	return 0;
+}
+
 static int npa_aq_init(struct rvu *rvu, struct rvu_block *block)
 {
 	u64 cfg;
@@ -75,12 +208,12 @@ void rvu_npa_freemem(struct rvu *rvu)
 {
 	struct rvu_hwinfo *hw = rvu->hw;
 	struct rvu_block *block;
-	int blkaddr, err;
+	int blkaddr;
 
 	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPA, 0);
 	if (blkaddr < 0)
 		return;
 
 	block = &hw->block[blkaddr];
-	rvu_aq_free(rvu, &block->aq);
+	rvu_aq_free(rvu, block->aq);
 }