mlxsw: Revert "Prepare for XM implementation - LPM trees"

This reverts commit 923ba95ea22d ("Merge branch
'mlxsw-spectrum-prepare-for-xm-implementation-lpm-trees'").

Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 31 insertions, 163 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index d1a94c22ee60..d830a35755a8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -8924,86 +8924,6 @@ mlxsw_reg_rmft2_ipv6_pack(char *payload, bool v, u16 offset, u16 virtual_router,
 	mlxsw_reg_rmft2_sip6_mask_memcpy_to(payload, (void *)&sip6_mask);
 }
 
-/* Note that XRALXX register position violates the rule of ordering register
- * definition by the ID. However, XRALXX pack helpers are using RALXX pack
- * helpers, RALXX registers have higher IDs.
- */
-
-/* XRALTA - XM Router Algorithmic LPM Tree Allocation Register
- * -----------------------------------------------------------
- * The XRALTA is used to allocate the XLT LPM trees.
- *
- * This register embeds original RALTA register.
- */
-#define MLXSW_REG_XRALTA_ID 0x7811
-#define MLXSW_REG_XRALTA_LEN 0x08
-#define MLXSW_REG_XRALTA_RALTA_OFFSET 0x04
-
-MLXSW_REG_DEFINE(xralta, MLXSW_REG_XRALTA_ID, MLXSW_REG_XRALTA_LEN);
-
-static inline void mlxsw_reg_xralta_pack(char *payload, bool alloc,
-					 enum mlxsw_reg_ralxx_protocol protocol,
-					 u8 tree_id)
-{
-	char *ralta_payload = payload + MLXSW_REG_XRALTA_RALTA_OFFSET;
-
-	MLXSW_REG_ZERO(xralta, payload);
-	mlxsw_reg_ralta_pack(ralta_payload, alloc, protocol, tree_id);
-}
-
-/* XRALST - XM Router Algorithmic LPM Structure Tree Register
- * ----------------------------------------------------------
- * The XRALST is used to set and query the structure of an XLT LPM tree.
- *
- * This register embeds original RALST register.
- */
-#define MLXSW_REG_XRALST_ID 0x7812
-#define MLXSW_REG_XRALST_LEN 0x108
-#define MLXSW_REG_XRALST_RALST_OFFSET 0x04
-
-MLXSW_REG_DEFINE(xralst, MLXSW_REG_XRALST_ID, MLXSW_REG_XRALST_LEN);
-
-static inline void mlxsw_reg_xralst_pack(char *payload, u8 root_bin, u8 tree_id)
-{
-	char *ralst_payload = payload + MLXSW_REG_XRALST_RALST_OFFSET;
-
-	MLXSW_REG_ZERO(xralst, payload);
-	mlxsw_reg_ralst_pack(ralst_payload, root_bin, tree_id);
-}
-
-static inline void mlxsw_reg_xralst_bin_pack(char *payload, u8 bin_number,
-					     u8 left_child_bin,
-					     u8 right_child_bin)
-{
-	char *ralst_payload = payload + MLXSW_REG_XRALST_RALST_OFFSET;
-
-	mlxsw_reg_ralst_bin_pack(ralst_payload, bin_number, left_child_bin,
-				 right_child_bin);
-}
-
-/* XRALTB - XM Router Algorithmic LPM Tree Binding Register
- * --------------------------------------------------------
- * The XRALTB register is used to bind virtual router and protocol
- * to an allocated LPM tree.
- *
- * This register embeds original RALTB register.
- */
-#define MLXSW_REG_XRALTB_ID 0x7813
-#define MLXSW_REG_XRALTB_LEN 0x08
-#define MLXSW_REG_XRALTB_RALTB_OFFSET 0x04
-
-MLXSW_REG_DEFINE(xraltb, MLXSW_REG_XRALTB_ID, MLXSW_REG_XRALTB_LEN);
-
-static inline void mlxsw_reg_xraltb_pack(char *payload, u16 virtual_router,
-					 enum mlxsw_reg_ralxx_protocol protocol,
-					 u8 tree_id)
-{
-	char *raltb_payload = payload + MLXSW_REG_XRALTB_RALTB_OFFSET;
-
-	MLXSW_REG_ZERO(xraltb, payload);
-	mlxsw_reg_raltb_pack(raltb_payload, virtual_router, protocol, tree_id);
-}
-
 /* MFCR - Management Fan Control Register
  * --------------------------------------
  * This register controls the settings of the Fan Speed PWM mechanism.
@@ -12510,9 +12430,6 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(rigr2),
 	MLXSW_REG(recr2),
 	MLXSW_REG(rmft2),
-	MLXSW_REG(xralta),
-	MLXSW_REG(xralst),
-	MLXSW_REG(xraltb),
 	MLXSW_REG(mfcr),
 	MLXSW_REG(mfsc),
 	MLXSW_REG(mfsm),
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 1b389e4ad3af..e3f52019cbcb 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -484,7 +484,6 @@ struct mlxsw_sp_fib {
 	struct mlxsw_sp_vr *vr;
 	struct mlxsw_sp_lpm_tree *lpm_tree;
 	enum mlxsw_sp_l3proto proto;
-	const struct mlxsw_sp_router_ll_ops *ll_ops;
 };
 
 struct mlxsw_sp_vr {
@@ -498,31 +497,12 @@ struct mlxsw_sp_vr {
 	refcount_t ul_rif_refcnt;
 };
 
-static int mlxsw_sp_router_ll_basic_ralta_write(struct mlxsw_sp *mlxsw_sp, char *xralta_pl)
-{
-	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta),
-			       xralta_pl + MLXSW_REG_XRALTA_RALTA_OFFSET);
-}
-
-static int mlxsw_sp_router_ll_basic_ralst_write(struct mlxsw_sp *mlxsw_sp, char *xralst_pl)
-{
-	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst),
-			       xralst_pl + MLXSW_REG_XRALST_RALST_OFFSET);
-}
-
-static int mlxsw_sp_router_ll_basic_raltb_write(struct mlxsw_sp *mlxsw_sp, char *xraltb_pl)
-{
-	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb),
-			       xraltb_pl + MLXSW_REG_XRALTB_RALTB_OFFSET);
-}
-
 static const struct rhashtable_params mlxsw_sp_fib_ht_params;
 
 static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp,
 						struct mlxsw_sp_vr *vr,
 						enum mlxsw_sp_l3proto proto)
 {
-	const struct mlxsw_sp_router_ll_ops *ll_ops = mlxsw_sp->router->proto_ll_ops[proto];
 	struct mlxsw_sp_lpm_tree *lpm_tree;
 	struct mlxsw_sp_fib *fib;
 	int err;
@@ -538,7 +518,6 @@ static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp,
 	fib->proto = proto;
 	fib->vr = vr;
 	fib->lpm_tree = lpm_tree;
-	fib->ll_ops = ll_ops;
 	mlxsw_sp_lpm_tree_hold(lpm_tree);
 	err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id);
 	if (err)
@@ -577,36 +556,33 @@ mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp)
 }
 
 static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp,
-				   const struct mlxsw_sp_router_ll_ops *ll_ops,
 				   struct mlxsw_sp_lpm_tree *lpm_tree)
 {
-	char xralta_pl[MLXSW_REG_XRALTA_LEN];
+	char ralta_pl[MLXSW_REG_RALTA_LEN];
 
-	mlxsw_reg_xralta_pack(xralta_pl, true,
-			      (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
-			      lpm_tree->id);
-	return ll_ops->ralta_write(mlxsw_sp, xralta_pl);
+	mlxsw_reg_ralta_pack(ralta_pl, true,
+			     (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
+			     lpm_tree->id);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
 }
 
 static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp,
-				   const struct mlxsw_sp_router_ll_ops *ll_ops,
 				   struct mlxsw_sp_lpm_tree *lpm_tree)
 {
-	char xralta_pl[MLXSW_REG_XRALTA_LEN];
+	char ralta_pl[MLXSW_REG_RALTA_LEN];
 
-	mlxsw_reg_xralta_pack(xralta_pl, false,
-			      (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
-			      lpm_tree->id);
-	ll_ops->ralta_write(mlxsw_sp, xralta_pl);
+	mlxsw_reg_ralta_pack(ralta_pl, false,
+			     (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
+			     lpm_tree->id);
+	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
 }
 
 static int
 mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
-				  const struct mlxsw_sp_router_ll_ops *ll_ops,
 				  struct mlxsw_sp_prefix_usage *prefix_usage,
 				  struct mlxsw_sp_lpm_tree *lpm_tree)
 {
-	char xralst_pl[MLXSW_REG_XRALST_LEN];
+	char ralst_pl[MLXSW_REG_RALST_LEN];
 	u8 root_bin = 0;
 	u8 prefix;
 	u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD;
@@ -614,20 +590,19 @@ mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage)
 		root_bin = prefix;
 
-	mlxsw_reg_xralst_pack(xralst_pl, root_bin, lpm_tree->id);
+	mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id);
 	mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) {
 		if (prefix == 0)
 			continue;
-		mlxsw_reg_xralst_bin_pack(xralst_pl, prefix, last_prefix,
-					  MLXSW_REG_RALST_BIN_NO_CHILD);
+		mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix,
+					 MLXSW_REG_RALST_BIN_NO_CHILD);
 		last_prefix = prefix;
 	}
-	return ll_ops->ralst_write(mlxsw_sp, xralst_pl);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl);
 }
 
 static struct mlxsw_sp_lpm_tree *
 mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
-			 const struct mlxsw_sp_router_ll_ops *ll_ops,
 			 struct mlxsw_sp_prefix_usage *prefix_usage,
 			 enum mlxsw_sp_l3proto proto)
 {
@@ -638,11 +613,12 @@ mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
 	if (!lpm_tree)
 		return ERR_PTR(-EBUSY);
 	lpm_tree->proto = proto;
-	err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, ll_ops, lpm_tree);
+	err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree);
 	if (err)
 		return ERR_PTR(err);
 
-	err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, ll_ops, prefix_usage, lpm_tree);
+	err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage,
+						lpm_tree);
 	if (err)
 		goto err_left_struct_set;
 	memcpy(&lpm_tree->prefix_usage, prefix_usage,
@@ -653,15 +629,14 @@ mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
 	return lpm_tree;
 
 err_left_struct_set:
-	mlxsw_sp_lpm_tree_free(mlxsw_sp, ll_ops, lpm_tree);
+	mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
 	return ERR_PTR(err);
 }
 
 static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp,
-				      const struct mlxsw_sp_router_ll_ops *ll_ops,
 				      struct mlxsw_sp_lpm_tree *lpm_tree)
 {
-	mlxsw_sp_lpm_tree_free(mlxsw_sp, ll_ops, lpm_tree);
+	mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
 }
 
 static struct mlxsw_sp_lpm_tree *
@@ -669,7 +644,6 @@ mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp,
 		      struct mlxsw_sp_prefix_usage *prefix_usage,
 		      enum mlxsw_sp_l3proto proto)
 {
-	const struct mlxsw_sp_router_ll_ops *ll_ops = mlxsw_sp->router->proto_ll_ops[proto];
 	struct mlxsw_sp_lpm_tree *lpm_tree;
 	int i;
 
@@ -683,7 +657,7 @@ mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp,
 			return lpm_tree;
 		}
 	}
-	return mlxsw_sp_lpm_tree_create(mlxsw_sp, ll_ops, prefix_usage, proto);
+	return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto);
 }
 
 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree)
@@ -694,11 +668,8 @@ static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree)
 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
 				  struct mlxsw_sp_lpm_tree *lpm_tree)
 {
-	const struct mlxsw_sp_router_ll_ops *ll_ops =
-				mlxsw_sp->router->proto_ll_ops[lpm_tree->proto];
-
 	if (--lpm_tree->ref_count == 0)
-		mlxsw_sp_lpm_tree_destroy(mlxsw_sp, ll_ops, lpm_tree);
+		mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree);
 }
 
 #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */
@@ -788,23 +759,23 @@ static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp)
 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
 				     const struct mlxsw_sp_fib *fib, u8 tree_id)
 {
-	char xraltb_pl[MLXSW_REG_XRALTB_LEN];
+	char raltb_pl[MLXSW_REG_RALTB_LEN];
 
-	mlxsw_reg_xraltb_pack(xraltb_pl, fib->vr->id,
-			      (enum mlxsw_reg_ralxx_protocol) fib->proto,
-			      tree_id);
-	return fib->ll_ops->raltb_write(mlxsw_sp, xraltb_pl);
+	mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
+			     (enum mlxsw_reg_ralxx_protocol) fib->proto,
+			     tree_id);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
 }
 
 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
 				       const struct mlxsw_sp_fib *fib)
 {
-	char xraltb_pl[MLXSW_REG_XRALTB_LEN];
+	char raltb_pl[MLXSW_REG_RALTB_LEN];
 
 	/* Bind to tree 0 which is default */
-	mlxsw_reg_xraltb_pack(xraltb_pl, fib->vr->id,
-			      (enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
-	return fib->ll_ops->raltb_write(mlxsw_sp, xraltb_pl);
+	mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
+			     (enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
 }
 
 static u32 mlxsw_sp_fix_tb_id(u32 tb_id)
@@ -10245,12 +10216,6 @@ static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
 	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl);
 }
 
-static const struct mlxsw_sp_router_ll_ops mlxsw_sp_router_ll_basic_ops = {
-	.ralta_write = mlxsw_sp_router_ll_basic_ralta_write,
-	.ralst_write = mlxsw_sp_router_ll_basic_ralst_write,
-	.raltb_write = mlxsw_sp_router_ll_basic_raltb_write,
-};
-
 static int mlxsw_sp_lb_rif_init(struct mlxsw_sp *mlxsw_sp)
 {
 	u16 lb_rif_index;
@@ -10324,9 +10289,6 @@ int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp,
 	if (err)
 		goto err_router_ops_init;
 
-	router->proto_ll_ops[MLXSW_SP_L3_PROTO_IPV4] = &mlxsw_sp_router_ll_basic_ops;
-	router->proto_ll_ops[MLXSW_SP_L3_PROTO_IPV6] = &mlxsw_sp_router_ll_basic_ops;
-
 	INIT_LIST_HEAD(&mlxsw_sp->router->nh_res_grp_list);
 	INIT_DELAYED_WORK(&mlxsw_sp->router->nh_grp_activity_dw,
 			  mlxsw_sp_nh_grp_activity_work);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
index f646a5d3a9c2..f7510be1cf2d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
@@ -51,8 +51,6 @@ struct mlxsw_sp_router {
 	const struct mlxsw_sp_ipip_ops **ipip_ops_arr;
 	struct mlxsw_sp_router_nve_decap nve_decap_config;
 	struct mutex lock; /* Protects shared router resources */
-	/* One set of ops for each protocol: IPv4 and IPv6 */
-	const struct mlxsw_sp_router_ll_ops *proto_ll_ops[MLXSW_SP_L3_PROTO_MAX];
 	struct mlxsw_sp_fib_entry_op_ctx *ll_op_ctx;
 	u16 lb_rif_index;
 	const struct mlxsw_sp_adj_grp_size_range *adj_grp_size_ranges;
@@ -64,15 +62,6 @@ struct mlxsw_sp_router {
 	u32 adj_trap_index;
 };
 
-/* Low-level router ops. Basically this is to handle the different
- * register sets to work with ordinary and XM trees and FIB entries.
- */
-struct mlxsw_sp_router_ll_ops {
-	int (*ralta_write)(struct mlxsw_sp *mlxsw_sp, char *xralta_pl);
-	int (*ralst_write)(struct mlxsw_sp *mlxsw_sp, char *xralst_pl);
-	int (*raltb_write)(struct mlxsw_sp *mlxsw_sp, char *xraltb_pl);
-};
-
 struct mlxsw_sp_rif_ipip_lb;
 struct mlxsw_sp_rif_ipip_lb_config {
 	enum mlxsw_reg_ritr_loopback_ipip_type lb_ipipt;