ice: remove unused recipe bookkeeping data

Remove root_buf from recipe struct. Its only usage was in ice_find_recp(),
where if recipe had an inverse action, it was skipped, but actually the
driver never adds inverse actions, so effectively it was pointless.

Without root_buf, the recipe data element in ice_add_sw_recipe() does
not need to be persistent and can also be automatically deallocated with
__free, which nicely simplifies unroll.

Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Author: Michal Swiatkowski

drivers/net/ethernet/intel/ice/ice_common.c

@@ -993,7 +993,6 @@ static void ice_cleanup_fltr_mgmt_struct(struct ice_hw *hw)
 				devm_kfree(ice_hw_to_dev(hw), lst_itr);
 			}
 		}
-		devm_kfree(ice_hw_to_dev(hw), recps[i].root_buf);
 	}
 	ice_rm_all_sw_replay_rule_info(hw);
 	devm_kfree(ice_hw_to_dev(hw), sw->recp_list);

drivers/net/ethernet/intel/ice/ice_switch.c

@@ -2445,13 +2445,6 @@ ice_get_recp_frm_fw(struct ice_hw *hw, struct ice_sw_recipe *recps, u8 rid,
 	lkup_exts->n_val_words = fv_word_idx;
 	recps[rid].big_recp = (num_recps > 1);
 	recps[rid].n_grp_count = (u8)num_recps;
-	recps[rid].root_buf = devm_kmemdup(ice_hw_to_dev(hw), tmp,
-					   recps[rid].n_grp_count * sizeof(*recps[rid].root_buf),
-					   GFP_KERNEL);
-	if (!recps[rid].root_buf) {
-		status = -ENOMEM;
-		goto err_unroll;
-	}
 
 	/* Copy result indexes */
 	bitmap_copy(recps[rid].res_idxs, result_bm, ICE_MAX_FV_WORDS);
@@ -4768,11 +4761,6 @@ ice_find_recp(struct ice_hw *hw, struct ice_prot_lkup_ext *lkup_exts,
 				continue;
 		}
 
-		/* Skip inverse action recipes */
-		if (recp[i].root_buf && recp[i].root_buf->content.act_ctrl &
-		    ICE_AQ_RECIPE_ACT_INV_ACT)
-			continue;
-
 		/* if number of words we are looking for match */
 		if (lkup_exts->n_val_words == recp[i].lkup_exts.n_val_words) {
 			struct ice_fv_word *ar = recp[i].lkup_exts.fv_words;
@@ -5081,9 +5069,9 @@ static int
 ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 		  unsigned long *profiles)
 {
+	struct ice_aqc_recipe_data_elem *buf __free(kfree) = NULL;
 	DECLARE_BITMAP(result_idx_bm, ICE_MAX_FV_WORDS);
 	struct ice_aqc_recipe_content *content;
-	struct ice_aqc_recipe_data_elem *buf;
 	struct ice_recp_grp_entry *entry;
 	u16 free_res_idx;
 	u8 chain_idx;
@@ -5112,12 +5100,9 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 	if (rm->n_grp_count > ICE_MAX_CHAIN_RECIPE)
 		return -ENOSPC;
 
-	buf = devm_kcalloc(ice_hw_to_dev(hw), rm->n_grp_count, sizeof(*buf),
-			   GFP_KERNEL);
-	if (!buf) {
-		status = -ENOMEM;
-		goto err_mem;
-	}
+	buf = kcalloc(rm->n_grp_count, sizeof(*buf), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
 
 	bitmap_zero(rm->r_bitmap, ICE_MAX_NUM_RECIPES);
 
@@ -5130,7 +5115,7 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 
 		status = ice_alloc_recipe(hw, &entry->rid);
 		if (status)
-			goto err_unroll;
+			return status;
 
 		content = &buf[recps].content;
 
@@ -5160,8 +5145,7 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 			 */
 			if (chain_idx >= ICE_MAX_FV_WORDS) {
 				ice_debug(hw, ICE_DBG_SW, "No chain index available\n");
-				status = -ENOSPC;
-				goto err_unroll;
+				return -ENOSPC;
 			}
 
 			entry->chain_idx = chain_idx;
@@ -5215,7 +5199,7 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 		 */
 		status = ice_alloc_recipe(hw, &rid);
 		if (status)
-			goto err_unroll;
+			return status;
 
 		content = &buf[recps].content;
 
@@ -5228,10 +5212,9 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 		last_chain_entry = devm_kzalloc(ice_hw_to_dev(hw),
 						sizeof(*last_chain_entry),
 						GFP_KERNEL);
-		if (!last_chain_entry) {
-			status = -ENOMEM;
-			goto err_unroll;
-		}
+		if (!last_chain_entry)
+			return -ENOMEM;
+
 		last_chain_entry->rid = rid;
 		memset(&content->lkup_indx, 0, sizeof(content->lkup_indx));
 		/* All recipes use look-up index 0 to match switch ID. */
@@ -5265,12 +5248,12 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 	}
 	status = ice_acquire_change_lock(hw, ICE_RES_WRITE);
 	if (status)
-		goto err_unroll;
+		return status;
 
 	status = ice_aq_add_recipe(hw, buf, rm->n_grp_count, NULL);
 	ice_release_change_lock(hw);
 	if (status)
-		goto err_unroll;
+		return status;
 
 	/* Every recipe that just got created add it to the recipe
 	 * book keeping list
@@ -5288,10 +5271,8 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 				idx_found = true;
 			}
 
-		if (!idx_found) {
-			status = -EIO;
-			goto err_unroll;
-		}
+		if (!idx_found)
+			return -EIO;
 
 		recp = &sw->recp_list[entry->rid];
 		is_root = (rm->root_rid == entry->rid);
@@ -5327,13 +5308,8 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
 		recp->allow_pass_l2 = rm->allow_pass_l2;
 		recp->recp_created = true;
 	}
-	rm->root_buf = buf;
-	return status;
 
-err_unroll:
-err_mem:
-	devm_kfree(ice_hw_to_dev(hw), buf);
-	return status;
+	return 0;
 }
 
 /**
@@ -5632,7 +5608,6 @@ ice_add_adv_recipe(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 		devm_kfree(ice_hw_to_dev(hw), fvit);
 	}
 
-	devm_kfree(ice_hw_to_dev(hw), rm->root_buf);
 	kfree(rm);
 
 err_free_lkup_exts:

drivers/net/ethernet/intel/ice/ice_switch.h

@@ -274,8 +274,6 @@ struct ice_sw_recipe {
 
 	struct list_head rg_list;
 
-	/* AQ buffer associated with this recipe */
-	struct ice_aqc_recipe_data_elem *root_buf;
 	/* This struct saves the fv_words for a given lookup */
 	struct ice_prot_lkup_ext lkup_exts;
 };