octeontx2-af: Config NPC KPU engines with parser profile

This patch configures all 16 KPUs and iKPU (pkinds) with
the KPU parser profile defined in npc_profile.h. Each KPU
engine has a 128 entry CAM, only CAM entries which are listed
in the profile are enabled and rest are left disabled.

Also
- Memory is allocated for pkind's bitmap and PFFUNC, interface
  channel mapping.
- Added all CSR offsets of NPC HW block.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/Makefile

@@ -8,4 +8,4 @@ obj-$(CONFIG_OCTEONTX2_AF) += octeontx2_af.o
 
 octeontx2_mbox-y := mbox.o
 octeontx2_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o \
-		  rvu_reg.o
+		  rvu_reg.o rvu_npc.o

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

@@ -140,4 +140,104 @@ struct npc_kpu_profile {
 	struct npc_kpu_profile_action *action;
 };
 
+/* NPC KPU register formats */
+struct npc_kpu_cam {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	u64 rsvd_63_56     : 8;
+	u64 state          : 8;
+	u64 dp2_data       : 16;
+	u64 dp1_data       : 16;
+	u64 dp0_data       : 16;
+#else
+	u64 dp0_data       : 16;
+	u64 dp1_data       : 16;
+	u64 dp2_data       : 16;
+	u64 state          : 8;
+	u64 rsvd_63_56     : 8;
+#endif
+};
+
+struct npc_kpu_action0 {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	u64 rsvd_63_57     : 7;
+	u64 byp_count      : 3;
+	u64 capture_ena    : 1;
+	u64 parse_done     : 1;
+	u64 next_state     : 8;
+	u64 rsvd_43        : 1;
+	u64 capture_lid    : 3;
+	u64 capture_ltype  : 4;
+	u64 capture_flags  : 8;
+	u64 ptr_advance    : 8;
+	u64 var_len_offset : 8;
+	u64 var_len_mask   : 8;
+	u64 var_len_right  : 1;
+	u64 var_len_shift  : 3;
+#else
+	u64 var_len_shift  : 3;
+	u64 var_len_right  : 1;
+	u64 var_len_mask   : 8;
+	u64 var_len_offset : 8;
+	u64 ptr_advance    : 8;
+	u64 capture_flags  : 8;
+	u64 capture_ltype  : 4;
+	u64 capture_lid    : 3;
+	u64 rsvd_43        : 1;
+	u64 next_state     : 8;
+	u64 parse_done     : 1;
+	u64 capture_ena    : 1;
+	u64 byp_count      : 3;
+	u64 rsvd_63_57     : 7;
+#endif
+};
+
+struct npc_kpu_action1 {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	u64 rsvd_63_36     : 28;
+	u64 errlev         : 4;
+	u64 errcode        : 8;
+	u64 dp2_offset     : 8;
+	u64 dp1_offset     : 8;
+	u64 dp0_offset     : 8;
+#else
+	u64 dp0_offset     : 8;
+	u64 dp1_offset     : 8;
+	u64 dp2_offset     : 8;
+	u64 errcode        : 8;
+	u64 errlev         : 4;
+	u64 rsvd_63_36     : 28;
+#endif
+};
+
+struct npc_kpu_pkind_cpi_def {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	u64 ena            : 1;
+	u64 rsvd_62_59     : 4;
+	u64 lid            : 3;
+	u64 ltype_match    : 4;
+	u64 ltype_mask     : 4;
+	u64 flags_match    : 8;
+	u64 flags_mask     : 8;
+	u64 add_offset     : 8;
+	u64 add_mask       : 8;
+	u64 rsvd_15        : 1;
+	u64 add_shift      : 3;
+	u64 rsvd_11_10     : 2;
+	u64 cpi_base       : 10;
+#else
+	u64 cpi_base       : 10;
+	u64 rsvd_11_10     : 2;
+	u64 add_shift      : 3;
+	u64 rsvd_15        : 1;
+	u64 add_mask       : 8;
+	u64 add_offset     : 8;
+	u64 flags_mask     : 8;
+	u64 flags_match    : 8;
+	u64 ltype_mask     : 4;
+	u64 ltype_match    : 4;
+	u64 lid            : 3;
+	u64 rsvd_62_59     : 4;
+	u64 ena            : 1;
+#endif
+};
 #endif /* NPC_H */

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

@@ -180,6 +180,9 @@ int rvu_get_blkaddr(struct rvu *rvu, int blktype, u16 pcifunc)
 	bool is_pf;
 
 	switch (blktype) {
+	case BLKTYPE_NPC:
+		blkaddr = BLKADDR_NPC;
+		goto exit;
 	case BLKTYPE_NPA:
 		blkaddr = BLKADDR_NPA;
 		goto exit;
@@ -566,6 +569,7 @@ static void rvu_free_hw_resources(struct rvu *rvu)
 	u64 cfg;
 
 	rvu_npa_freemem(rvu);
+	rvu_npc_freemem(rvu);
 	rvu_nix_freemem(rvu);
 
 	/* Free block LF bitmaps */
@@ -771,6 +775,10 @@ static int rvu_setup_hw_resources(struct rvu *rvu)
 		rvu_scan_block(rvu, block);
 	}
 
+	err = rvu_npc_init(rvu);
+	if (err)
+		return err;
+
 	err = rvu_npa_init(rvu);
 	if (err)
 		return err;

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

@@ -100,6 +100,11 @@ struct nix_txsch {
 	u16  *pfvf_map;
 };
 
+struct npc_pkind {
+	struct rsrc_bmap rsrc;
+	u32	*pfchan_map;
+};
+
 struct nix_hw {
 	struct nix_txsch txsch[NIX_TXSCH_LVL_CNT]; /* Tx schedulers */
 };
@@ -113,9 +118,12 @@ struct rvu_hwinfo {
 	u8	cgx_links;
 	u8	lbk_links;
 	u8	sdp_links;
+	u8	npc_kpus;          /* No of parser units */
+
 
 	struct rvu_block block[BLK_COUNT]; /* Block info */
 	struct nix_hw    *nix0;
+	struct npc_pkind pkind;
 };
 
 struct rvu {
@@ -290,4 +298,8 @@ int rvu_mbox_handler_NIX_TXSCHQ_CFG(struct rvu *rvu,
 				    struct msg_rsp *rsp);
 int rvu_mbox_handler_NIX_STATS_RST(struct rvu *rvu, struct msg_req *req,
 				   struct msg_rsp *rsp);
+
+/* NPC APIs */
+int rvu_npc_init(struct rvu *rvu);
+void rvu_npc_freemem(struct rvu *rvu);
 #endif /* RVU_H */

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

+// SPDX-License-Identifier: GPL-2.0
+/* Marvell OcteonTx2 RVU Admin Function driver
+ *
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "rvu_struct.h"
+#include "rvu_reg.h"
+#include "rvu.h"
+#include "npc.h"
+#include "npc_profile.h"
+
+static void npc_config_kpuaction(struct rvu *rvu, int blkaddr,
+				 struct npc_kpu_profile_action *kpuaction,
+				 int kpu, int entry, bool pkind)
+{
+	struct npc_kpu_action0 action0 = {0};
+	struct npc_kpu_action1 action1 = {0};
+	u64 reg;
+
+	action1.errlev = kpuaction->errlev;
+	action1.errcode = kpuaction->errcode;
+	action1.dp0_offset = kpuaction->dp0_offset;
+	action1.dp1_offset = kpuaction->dp1_offset;
+	action1.dp2_offset = kpuaction->dp2_offset;
+
+	if (pkind)
+		reg = NPC_AF_PKINDX_ACTION1(entry);
+	else
+		reg = NPC_AF_KPUX_ENTRYX_ACTION1(kpu, entry);
+
+	rvu_write64(rvu, blkaddr, reg, *(u64 *)&action1);
+
+	action0.byp_count = kpuaction->bypass_count;
+	action0.capture_ena = kpuaction->cap_ena;
+	action0.parse_done = kpuaction->parse_done;
+	action0.next_state = kpuaction->next_state;
+	action0.capture_lid = kpuaction->lid;
+	action0.capture_ltype = kpuaction->ltype;
+	action0.capture_flags = kpuaction->flags;
+	action0.ptr_advance = kpuaction->ptr_advance;
+	action0.var_len_offset = kpuaction->offset;
+	action0.var_len_mask = kpuaction->mask;
+	action0.var_len_right = kpuaction->right;
+	action0.var_len_shift = kpuaction->shift;
+
+	if (pkind)
+		reg = NPC_AF_PKINDX_ACTION0(entry);
+	else
+		reg = NPC_AF_KPUX_ENTRYX_ACTION0(kpu, entry);
+
+	rvu_write64(rvu, blkaddr, reg, *(u64 *)&action0);
+}
+
+static void npc_config_kpucam(struct rvu *rvu, int blkaddr,
+			      struct npc_kpu_profile_cam *kpucam,
+			      int kpu, int entry)
+{
+	struct npc_kpu_cam cam0 = {0};
+	struct npc_kpu_cam cam1 = {0};
+
+	cam1.state = kpucam->state & kpucam->state_mask;
+	cam1.dp0_data = kpucam->dp0 & kpucam->dp0_mask;
+	cam1.dp1_data = kpucam->dp1 & kpucam->dp1_mask;
+	cam1.dp2_data = kpucam->dp2 & kpucam->dp2_mask;
+
+	cam0.state = ~kpucam->state & kpucam->state_mask;
+	cam0.dp0_data = ~kpucam->dp0 & kpucam->dp0_mask;
+	cam0.dp1_data = ~kpucam->dp1 & kpucam->dp1_mask;
+	cam0.dp2_data = ~kpucam->dp2 & kpucam->dp2_mask;
+
+	rvu_write64(rvu, blkaddr,
+		    NPC_AF_KPUX_ENTRYX_CAMX(kpu, entry, 0), *(u64 *)&cam0);
+	rvu_write64(rvu, blkaddr,
+		    NPC_AF_KPUX_ENTRYX_CAMX(kpu, entry, 1), *(u64 *)&cam1);
+}
+
+static inline u64 enable_mask(int count)
+{
+	return (((count) < 64) ? ~(BIT_ULL(count) - 1) : (0x00ULL));
+}
+
+static void npc_program_kpu_profile(struct rvu *rvu, int blkaddr, int kpu,
+				    struct npc_kpu_profile *profile)
+{
+	int entry, num_entries, max_entries;
+
+	if (profile->cam_entries != profile->action_entries) {
+		dev_err(rvu->dev,
+			"KPU%d: CAM and action entries [%d != %d] not equal\n",
+			kpu, profile->cam_entries, profile->action_entries);
+	}
+
+	max_entries = rvu_read64(rvu, blkaddr, NPC_AF_CONST1) & 0xFFF;
+
+	/* Program CAM match entries for previous KPU extracted data */
+	num_entries = min_t(int, profile->cam_entries, max_entries);
+	for (entry = 0; entry < num_entries; entry++)
+		npc_config_kpucam(rvu, blkaddr,
+				  &profile->cam[entry], kpu, entry);
+
+	/* Program this KPU's actions */
+	num_entries = min_t(int, profile->action_entries, max_entries);
+	for (entry = 0; entry < num_entries; entry++)
+		npc_config_kpuaction(rvu, blkaddr, &profile->action[entry],
+				     kpu, entry, false);
+
+	/* Enable all programmed entries */
+	num_entries = min_t(int, profile->action_entries, profile->cam_entries);
+	rvu_write64(rvu, blkaddr,
+		    NPC_AF_KPUX_ENTRY_DISX(kpu, 0), enable_mask(num_entries));
+	if (num_entries > 64) {
+		rvu_write64(rvu, blkaddr,
+			    NPC_AF_KPUX_ENTRY_DISX(kpu, 1),
+			    enable_mask(num_entries - 64));
+	}
+
+	/* Enable this KPU */
+	rvu_write64(rvu, blkaddr, NPC_AF_KPUX_CFG(kpu), 0x01);
+}
+
+static void npc_parser_profile_init(struct rvu *rvu, int blkaddr)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	int num_pkinds, num_kpus, idx;
+	struct npc_pkind *pkind;
+
+	/* Get HW limits */
+	hw->npc_kpus = (rvu_read64(rvu, blkaddr, NPC_AF_CONST) >> 8) & 0x1F;
+
+	/* Disable all KPUs and their entries */
+	for (idx = 0; idx < hw->npc_kpus; idx++) {
+		rvu_write64(rvu, blkaddr,
+			    NPC_AF_KPUX_ENTRY_DISX(idx, 0), ~0ULL);
+		rvu_write64(rvu, blkaddr,
+			    NPC_AF_KPUX_ENTRY_DISX(idx, 1), ~0ULL);
+		rvu_write64(rvu, blkaddr, NPC_AF_KPUX_CFG(idx), 0x00);
+	}
+
+	/* First program IKPU profile i.e PKIND configs.
+	 * Check HW max count to avoid configuring junk or
+	 * writing to unsupported CSR addresses.
+	 */
+	pkind = &hw->pkind;
+	num_pkinds = ARRAY_SIZE(ikpu_action_entries);
+	num_pkinds = min_t(int, pkind->rsrc.max, num_pkinds);
+
+	for (idx = 0; idx < num_pkinds; idx++)
+		npc_config_kpuaction(rvu, blkaddr,
+				     &ikpu_action_entries[idx], 0, idx, true);
+
+	/* Program KPU CAM and Action profiles */
+	num_kpus = ARRAY_SIZE(npc_kpu_profiles);
+	num_kpus = min_t(int, hw->npc_kpus, num_kpus);
+
+	for (idx = 0; idx < num_kpus; idx++)
+		npc_program_kpu_profile(rvu, blkaddr,
+					idx, &npc_kpu_profiles[idx]);
+}
+
+int rvu_npc_init(struct rvu *rvu)
+{
+	struct npc_pkind *pkind = &rvu->hw->pkind;
+	int blkaddr, err;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0) {
+		dev_err(rvu->dev, "%s: NPC block not implemented\n", __func__);
+		return -ENODEV;
+	}
+
+	/* Allocate resource bimap for pkind*/
+	pkind->rsrc.max = (rvu_read64(rvu, blkaddr,
+				      NPC_AF_CONST1) >> 12) & 0xFF;
+	err = rvu_alloc_bitmap(&pkind->rsrc);
+	if (err)
+		return err;
+
+	/* Allocate mem for pkind to PF and channel mapping info */
+	pkind->pfchan_map = devm_kcalloc(rvu->dev, pkind->rsrc.max,
+					 sizeof(u32), GFP_KERNEL);
+	if (!pkind->pfchan_map)
+		return -ENOMEM;
+
+	/* Configure KPU profile */
+	npc_parser_profile_init(rvu, blkaddr);
+
+	return 0;
+}
+
+void rvu_npc_freemem(struct rvu *rvu)
+{
+	struct npc_pkind *pkind = &rvu->hw->pkind;
+
+	kfree(pkind->rsrc.bmap);
+}

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

@@ -438,4 +438,65 @@
 #define NDC_AF_BLK_RST                  (0x002F0)
 #define NPC_AF_BLK_RST                  (0x00040)
 
+/* NPC */
+#define NPC_AF_CFG			(0x00000)
+#define NPC_AF_ACTIVE_PC		(0x00010)
+#define NPC_AF_CONST			(0x00020)
+#define NPC_AF_CONST1			(0x00030)
+#define NPC_AF_BLK_RST			(0x00040)
+#define NPC_AF_MCAM_SCRUB_CTL		(0x000a0)
+#define NPC_AF_KCAM_SCRUB_CTL		(0x000b0)
+#define NPC_AF_KPUX_CFG(a)		(0x00500 | (a) << 3)
+#define NPC_AF_PCK_CFG			(0x00600)
+#define NPC_AF_PCK_DEF_OL2		(0x00610)
+#define NPC_AF_PCK_DEF_OIP4		(0x00620)
+#define NPC_AF_PCK_DEF_OIP6		(0x00630)
+#define NPC_AF_PCK_DEF_IIP4		(0x00640)
+#define NPC_AF_KEX_LDATAX_FLAGS_CFG(a)	(0x00800 | (a) << 3)
+#define NPC_AF_INTFX_KEX_CFG(a)		(0x01010 | (a) << 8)
+#define NPC_AF_PKINDX_ACTION0(a)	(0x80000ull | (a) << 6)
+#define NPC_AF_PKINDX_ACTION1(a)	(0x80008ull | (a) << 6)
+#define NPC_AF_PKINDX_CPI_DEFX(a, b)	(0x80020ull | (a) << 6 | (b) << 3)
+#define NPC_AF_KPUX_ENTRYX_CAMX(a, b, c) \
+		(0x100000 | (a) << 14 | (b) << 6 | (c) << 3)
+#define NPC_AF_KPUX_ENTRYX_ACTION0(a, b) \
+		(0x100020 | (a) << 14 | (b) << 6)
+#define NPC_AF_KPUX_ENTRYX_ACTION1(a, b) \
+		(0x100028 | (a) << 14 | (b) << 6)
+#define NPC_AF_KPUX_ENTRY_DISX(a, b)	(0x180000 | (a) << 6 | (b) << 3)
+#define NPC_AF_CPIX_CFG(a)		(0x200000 | (a) << 3)
+#define NPC_AF_INTFX_LIDX_LTX_LDX_CFG(a, b, c, d) \
+		(0x900000 | (a) << 16 | (b) << 12 | (c) << 5 | (d) << 3)
+#define NPC_AF_INTFX_LDATAX_FLAGSX_CFG(a, b, c) \
+		(0x980000 | (a) << 16 | (b) << 12 | (c) << 3)
+#define NPC_AF_MCAMEX_BANKX_CAMX_INTF(a, b, c)       \
+		(0x1000000ull | (a) << 10 | (b) << 6 | (c) << 3)
+#define NPC_AF_MCAMEX_BANKX_CAMX_W0(a, b, c)         \
+		(0x1000010ull | (a) << 10 | (b) << 6 | (c) << 3)
+#define NPC_AF_MCAMEX_BANKX_CAMX_W1(a, b, c)         \
+		(0x1000020ull | (a) << 10 | (b) << 6 | (c) << 3)
+#define NPC_AF_MCAMEX_BANKX_CFG(a, b)	 (0x1800000ull | (a) << 8 | (b) << 4)
+#define NPC_AF_MCAMEX_BANKX_STAT_ACT(a, b) \
+		(0x1880000 | (a) << 8 | (b) << 4)
+#define NPC_AF_MATCH_STATX(a)		(0x1880008 | (a) << 8)
+#define NPC_AF_INTFX_MISS_STAT_ACT(a)	(0x1880040 + (a) * 0x8)
+#define NPC_AF_MCAMEX_BANKX_ACTION(a, b) (0x1900000ull | (a) << 8 | (b) << 4)
+#define NPC_AF_MCAMEX_BANKX_TAG_ACT(a, b) \
+		(0x1900008 | (a) << 8 | (b) << 4)
+#define NPC_AF_INTFX_MISS_ACT(a)	(0x1a00000 | (a) << 4)
+#define NPC_AF_INTFX_MISS_TAG_ACT(a)	(0x1b00008 | (a) << 4)
+#define NPC_AF_MCAM_BANKX_HITX(a, b)	(0x1c80000 | (a) << 8 | (b) << 4)
+#define NPC_AF_LKUP_CTL			(0x2000000)
+#define NPC_AF_LKUP_DATAX(a)		(0x2000200 | (a) << 4)
+#define NPC_AF_LKUP_RESULTX(a)		(0x2000400 | (a) << 4)
+#define NPC_AF_INTFX_STAT(a)		(0x2000800 | (a) << 4)
+#define NPC_AF_DBG_CTL			(0x3000000)
+#define NPC_AF_DBG_STATUS		(0x3000010)
+#define NPC_AF_KPUX_DBG(a)		(0x3000020 | (a) << 8)
+#define NPC_AF_IKPU_ERR_CTL		(0x3000080)
+#define NPC_AF_KPUX_ERR_CTL(a)		(0x30000a0 | (a) << 8)
+#define NPC_AF_MCAM_DBG			(0x3001000)
+#define NPC_AF_DBG_DATAX(a)		(0x3001400 | (a) << 4)
+#define NPC_AF_DBG_RESULTX(a)		(0x3001800 | (a) << 4)
+
 #endif /* RVU_REG_H */