ice: Optimize table usage

Attempt to optimize TCAM entries and reduce table resource usage by
searching for profiles that can be reused. Provide resource cleanup
of both hardware and software structures.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

5 files changed, 773 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
index 6dca611b408a..99208946224c 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
@@ -1922,6 +1922,26 @@ ice_alloc_prof_id(struct ice_hw *hw, enum ice_block blk, u8 *prof_id)
 }
 
 /**
+ * ice_free_prof_id - free profile ID
+ * @hw: pointer to the HW struct
+ * @blk: the block from which to free the profile ID
+ * @prof_id: the profile ID to free
+ *
+ * This function frees a profile ID, which also corresponds to a Field Vector.
+ */
+static enum ice_status
+ice_free_prof_id(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
+{
+	u16 tmp_prof_id = (u16)prof_id;
+	u16 res_type;
+
+	if (!ice_prof_id_rsrc_type(blk, &res_type))
+		return ICE_ERR_PARAM;
+
+	return ice_free_hw_res(hw, res_type, 1, &tmp_prof_id);
+}
+
+/**
  * ice_prof_inc_ref - increment reference count for profile
  * @hw: pointer to the HW struct
  * @blk: the block from which to free the profile ID
@@ -1962,6 +1982,28 @@ ice_write_es(struct ice_hw *hw, enum ice_block blk, u8 prof_id,
 	}
 }
 
+/**
+ * ice_prof_dec_ref - decrement reference count for profile
+ * @hw: pointer to the HW struct
+ * @blk: the block from which to free the profile ID
+ * @prof_id: the profile ID for which to decrement the reference count
+ */
+static enum ice_status
+ice_prof_dec_ref(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
+{
+	if (prof_id > hw->blk[blk].es.count)
+		return ICE_ERR_PARAM;
+
+	if (hw->blk[blk].es.ref_count[prof_id] > 0) {
+		if (!--hw->blk[blk].es.ref_count[prof_id]) {
+			ice_write_es(hw, blk, prof_id, NULL);
+			return ice_free_prof_id(hw, blk, prof_id);
+		}
+	}
+
+	return 0;
+}
+
 /* Block / table section IDs */
 static const u32 ice_blk_sids[ICE_BLK_COUNT][ICE_SID_OFF_COUNT] = {
 	/* SWITCH */
@@ -2219,6 +2261,64 @@ void ice_fill_blk_tbls(struct ice_hw *hw)
 }
 
 /**
+ * ice_free_prof_map - free profile map
+ * @hw: pointer to the hardware structure
+ * @blk_idx: HW block index
+ */
+static void ice_free_prof_map(struct ice_hw *hw, u8 blk_idx)
+{
+	struct ice_es *es = &hw->blk[blk_idx].es;
+	struct ice_prof_map *del, *tmp;
+
+	mutex_lock(&es->prof_map_lock);
+	list_for_each_entry_safe(del, tmp, &es->prof_map, list) {
+		list_del(&del->list);
+		devm_kfree(ice_hw_to_dev(hw), del);
+	}
+	INIT_LIST_HEAD(&es->prof_map);
+	mutex_unlock(&es->prof_map_lock);
+}
+
+/**
+ * ice_free_flow_profs - free flow profile entries
+ * @hw: pointer to the hardware structure
+ * @blk_idx: HW block index
+ */
+static void ice_free_flow_profs(struct ice_hw *hw, u8 blk_idx)
+{
+	struct ice_flow_prof *p, *tmp;
+
+	mutex_lock(&hw->fl_profs_locks[blk_idx]);
+	list_for_each_entry_safe(p, tmp, &hw->fl_profs[blk_idx], l_entry) {
+		list_del(&p->l_entry);
+		devm_kfree(ice_hw_to_dev(hw), p);
+	}
+	mutex_unlock(&hw->fl_profs_locks[blk_idx]);
+
+	/* if driver is in reset and tables are being cleared
+	 * re-initialize the flow profile list heads
+	 */
+	INIT_LIST_HEAD(&hw->fl_profs[blk_idx]);
+}
+
+/**
+ * ice_free_vsig_tbl - free complete VSIG table entries
+ * @hw: pointer to the hardware structure
+ * @blk: the HW block on which to free the VSIG table entries
+ */
+static void ice_free_vsig_tbl(struct ice_hw *hw, enum ice_block blk)
+{
+	u16 i;
+
+	if (!hw->blk[blk].xlt2.vsig_tbl)
+		return;
+
+	for (i = 1; i < ICE_MAX_VSIGS; i++)
+		if (hw->blk[blk].xlt2.vsig_tbl[i].in_use)
+			ice_vsig_free(hw, blk, i);
+}
+
+/**
  * ice_free_hw_tbls - free hardware table memory
  * @hw: pointer to the hardware structure
  */
@@ -2231,11 +2331,15 @@ void ice_free_hw_tbls(struct ice_hw *hw)
 		if (hw->blk[i].is_list_init) {
 			struct ice_es *es = &hw->blk[i].es;
 
+			ice_free_prof_map(hw, i);
 			mutex_destroy(&es->prof_map_lock);
+
+			ice_free_flow_profs(hw, i);
 			mutex_destroy(&hw->fl_profs_locks[i]);
 
 			hw->blk[i].is_list_init = false;
 		}
+		ice_free_vsig_tbl(hw, (enum ice_block)i);
 		devm_kfree(ice_hw_to_dev(hw), hw->blk[i].xlt1.ptypes);
 		devm_kfree(ice_hw_to_dev(hw), hw->blk[i].xlt1.ptg_tbl);
 		devm_kfree(ice_hw_to_dev(hw), hw->blk[i].xlt1.t);
@@ -2283,6 +2387,13 @@ void ice_clear_hw_tbls(struct ice_hw *hw)
 		struct ice_xlt2 *xlt2 = &hw->blk[i].xlt2;
 		struct ice_es *es = &hw->blk[i].es;
 
+		if (hw->blk[i].is_list_init) {
+			ice_free_prof_map(hw, i);
+			ice_free_flow_profs(hw, i);
+		}
+
+		ice_free_vsig_tbl(hw, (enum ice_block)i);
+
 		memset(xlt1->ptypes, 0, xlt1->count * sizeof(*xlt1->ptypes));
 		memset(xlt1->ptg_tbl, 0,
 		       ICE_MAX_PTGS * sizeof(*xlt1->ptg_tbl));
@@ -2957,6 +3068,25 @@ ice_search_prof_id(struct ice_hw *hw, enum ice_block blk, u64 id)
 }
 
 /**
+ * ice_vsig_prof_id_count - count profiles in a VSIG
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @vsig: VSIG to remove the profile from
+ */
+static u16
+ice_vsig_prof_id_count(struct ice_hw *hw, enum ice_block blk, u16 vsig)
+{
+	u16 idx = vsig & ICE_VSIG_IDX_M, count = 0;
+	struct ice_vsig_prof *p;
+
+	list_for_each_entry(p, &hw->blk[blk].xlt2.vsig_tbl[idx].prop_lst,
+			    list)
+		count++;
+
+	return count;
+}
+
+/**
  * ice_rel_tcam_idx - release a TCAM index
  * @hw: pointer to the HW struct
  * @blk: hardware block
@@ -3065,6 +3195,117 @@ ice_rem_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig,
 }
 
 /**
+ * ice_rem_prof_id_vsig - remove a specific profile from a VSIG
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @vsig: VSIG to remove the profile from
+ * @hdl: profile handle indicating which profile to remove
+ * @chg: list to receive a record of changes
+ */
+static enum ice_status
+ice_rem_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
+		     struct list_head *chg)
+{
+	u16 idx = vsig & ICE_VSIG_IDX_M;
+	struct ice_vsig_prof *p, *t;
+	enum ice_status status;
+
+	list_for_each_entry_safe(p, t,
+				 &hw->blk[blk].xlt2.vsig_tbl[idx].prop_lst,
+				 list)
+		if (p->profile_cookie == hdl) {
+			if (ice_vsig_prof_id_count(hw, blk, vsig) == 1)
+				/* this is the last profile, remove the VSIG */
+				return ice_rem_vsig(hw, blk, vsig, chg);
+
+			status = ice_rem_prof_id(hw, blk, p);
+			if (!status) {
+				list_del(&p->list);
+				devm_kfree(ice_hw_to_dev(hw), p);
+			}
+			return status;
+		}
+
+	return ICE_ERR_DOES_NOT_EXIST;
+}
+
+/**
+ * ice_rem_flow_all - remove all flows with a particular profile
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @id: profile tracking ID
+ */
+static enum ice_status
+ice_rem_flow_all(struct ice_hw *hw, enum ice_block blk, u64 id)
+{
+	struct ice_chs_chg *del, *tmp;
+	enum ice_status status;
+	struct list_head chg;
+	u16 i;
+
+	INIT_LIST_HEAD(&chg);
+
+	for (i = 1; i < ICE_MAX_VSIGS; i++)
+		if (hw->blk[blk].xlt2.vsig_tbl[i].in_use) {
+			if (ice_has_prof_vsig(hw, blk, i, id)) {
+				status = ice_rem_prof_id_vsig(hw, blk, i, id,
+							      &chg);
+				if (status)
+					goto err_ice_rem_flow_all;
+			}
+		}
+
+	status = ice_upd_prof_hw(hw, blk, &chg);
+
+err_ice_rem_flow_all:
+	list_for_each_entry_safe(del, tmp, &chg, list_entry) {
+		list_del(&del->list_entry);
+		devm_kfree(ice_hw_to_dev(hw), del);
+	}
+
+	return status;
+}
+
+/**
+ * ice_rem_prof - remove profile
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @id: profile tracking ID
+ *
+ * This will remove the profile specified by the ID parameter, which was
+ * previously created through ice_add_prof. If any existing entries
+ * are associated with this profile, they will be removed as well.
+ */
+enum ice_status ice_rem_prof(struct ice_hw *hw, enum ice_block blk, u64 id)
+{
+	struct ice_prof_map *pmap;
+	enum ice_status status;
+
+	mutex_lock(&hw->blk[blk].es.prof_map_lock);
+
+	pmap = ice_search_prof_id_low(hw, blk, id);
+	if (!pmap) {
+		status = ICE_ERR_DOES_NOT_EXIST;
+		goto err_ice_rem_prof;
+	}
+
+	/* remove all flows with this profile */
+	status = ice_rem_flow_all(hw, blk, pmap->profile_cookie);
+	if (status)
+		goto err_ice_rem_prof;
+
+	/* dereference profile, and possibly remove */
+	ice_prof_dec_ref(hw, blk, pmap->prof_id);
+
+	list_del(&pmap->list);
+	devm_kfree(ice_hw_to_dev(hw), pmap);
+
+err_ice_rem_prof:
+	mutex_unlock(&hw->blk[blk].es.prof_map_lock);
+	return status;
+}
+
+/**
  * ice_get_prof - get profile
  * @hw: pointer to the HW struct
  * @blk: hardware block
@@ -3714,3 +3955,156 @@ err_ice_add_prof_id_flow:
 
 	return status;
 }
+
+/**
+ * ice_rem_prof_from_list - remove a profile from list
+ * @hw: pointer to the HW struct
+ * @lst: list to remove the profile from
+ * @hdl: the profile handle indicating the profile to remove
+ */
+static enum ice_status
+ice_rem_prof_from_list(struct ice_hw *hw, struct list_head *lst, u64 hdl)
+{
+	struct ice_vsig_prof *ent, *tmp;
+
+	list_for_each_entry_safe(ent, tmp, lst, list)
+		if (ent->profile_cookie == hdl) {
+			list_del(&ent->list);
+			devm_kfree(ice_hw_to_dev(hw), ent);
+			return 0;
+		}
+
+	return ICE_ERR_DOES_NOT_EXIST;
+}
+
+/**
+ * ice_rem_prof_id_flow - remove flow
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @vsi: the VSI from which to remove the profile specified by ID
+ * @hdl: profile tracking handle
+ *
+ * Calling this function will update the hardware tables to remove the
+ * profile indicated by the ID parameter for the VSIs specified in the VSI
+ * array. Once successfully called, the flow will be disabled.
+ */
+enum ice_status
+ice_rem_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl)
+{
+	struct ice_vsig_prof *tmp1, *del1;
+	struct ice_chs_chg *tmp, *del;
+	struct list_head chg, copy;
+	enum ice_status status;
+	u16 vsig;
+
+	INIT_LIST_HEAD(&copy);
+	INIT_LIST_HEAD(&chg);
+
+	/* determine if VSI is already part of a VSIG */
+	status = ice_vsig_find_vsi(hw, blk, vsi, &vsig);
+	if (!status && vsig) {
+		bool last_profile;
+		bool only_vsi;
+		u16 ref;
+
+		/* found in VSIG */
+		last_profile = ice_vsig_prof_id_count(hw, blk, vsig) == 1;
+		status = ice_vsig_get_ref(hw, blk, vsig, &ref);
+		if (status)
+			goto err_ice_rem_prof_id_flow;
+		only_vsi = (ref == 1);
+
+		if (only_vsi) {
+			/* If the original VSIG only contains one reference,
+			 * which will be the requesting VSI, then the VSI is not
+			 * sharing entries and we can simply remove the specific
+			 * characteristics from the VSIG.
+			 */
+
+			if (last_profile) {
+				/* If there are no profiles left for this VSIG,
+				 * then simply remove the the VSIG.
+				 */
+				status = ice_rem_vsig(hw, blk, vsig, &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+			} else {
+				status = ice_rem_prof_id_vsig(hw, blk, vsig,
+							      hdl, &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+
+				/* Adjust priorities */
+				status = ice_adj_prof_priorities(hw, blk, vsig,
+								 &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+			}
+
+		} else {
+			/* Make a copy of the VSIG's list of Profiles */
+			status = ice_get_profs_vsig(hw, blk, vsig, &copy);
+			if (status)
+				goto err_ice_rem_prof_id_flow;
+
+			/* Remove specified profile entry from the list */
+			status = ice_rem_prof_from_list(hw, &copy, hdl);
+			if (status)
+				goto err_ice_rem_prof_id_flow;
+
+			if (list_empty(&copy)) {
+				status = ice_move_vsi(hw, blk, vsi,
+						      ICE_DEFAULT_VSIG, &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+
+			} else if (!ice_find_dup_props_vsig(hw, blk, &copy,
+							    &vsig)) {
+				/* found an exact match */
+				/* add or move VSI to the VSIG that matches */
+				/* Search for a VSIG with a matching profile
+				 * list
+				 */
+
+				/* Found match, move VSI to the matching VSIG */
+				status = ice_move_vsi(hw, blk, vsi, vsig, &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+			} else {
+				/* since no existing VSIG supports this
+				 * characteristic pattern, we need to create a
+				 * new VSIG and TCAM entries
+				 */
+				status = ice_create_vsig_from_lst(hw, blk, vsi,
+								  &copy, &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+
+				/* Adjust priorities */
+				status = ice_adj_prof_priorities(hw, blk, vsig,
+								 &chg);
+				if (status)
+					goto err_ice_rem_prof_id_flow;
+			}
+		}
+	} else {
+		status = ICE_ERR_DOES_NOT_EXIST;
+	}
+
+	/* update hardware tables */
+	if (!status)
+		status = ice_upd_prof_hw(hw, blk, &chg);
+
+err_ice_rem_prof_id_flow:
+	list_for_each_entry_safe(del, tmp, &chg, list_entry) {
+		list_del(&del->list_entry);
+		devm_kfree(ice_hw_to_dev(hw), del);
+	}
+
+	list_for_each_entry_safe(del1, tmp1, &copy, list) {
+		list_del(&del1->list);
+		devm_kfree(ice_hw_to_dev(hw), del1);
+	}
+
+	return status;
+}
diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.h b/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
index 33e4510da24c..c7b5e1a6ea2b 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
@@ -23,6 +23,8 @@ ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 	     struct ice_fv_word *es);
 enum ice_status
 ice_add_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl);
+enum ice_status
+ice_rem_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl);
 enum ice_status ice_init_pkg(struct ice_hw *hw, u8 *buff, u32 len);
 enum ice_status
 ice_copy_and_init_pkg(struct ice_hw *hw, const u8 *buf, u32 len);
@@ -31,4 +33,6 @@ void ice_free_seg(struct ice_hw *hw);
 void ice_fill_blk_tbls(struct ice_hw *hw);
 void ice_clear_hw_tbls(struct ice_hw *hw);
 void ice_free_hw_tbls(struct ice_hw *hw);
+enum ice_status
+ice_rem_prof(struct ice_hw *hw, enum ice_block blk, u64 id);
 #endif /* _ICE_FLEX_PIPE_H_ */
diff --git a/drivers/net/ethernet/intel/ice/ice_flow.c b/drivers/net/ethernet/intel/ice/ice_flow.c
index 1bbf4b6ed7d2..ffce2284d8fa 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.c
+++ b/drivers/net/ethernet/intel/ice/ice_flow.c
@@ -377,6 +377,77 @@ ice_flow_proc_segs(struct ice_hw *hw, struct ice_flow_prof_params *params)
 	return status;
 }
 
+#define ICE_FLOW_FIND_PROF_CHK_FLDS	0x00000001
+#define ICE_FLOW_FIND_PROF_CHK_VSI	0x00000002
+#define ICE_FLOW_FIND_PROF_NOT_CHK_DIR	0x00000004
+
+/**
+ * ice_flow_find_prof_conds - Find a profile matching headers and conditions
+ * @hw: pointer to the HW struct
+ * @blk: classification stage
+ * @dir: flow direction
+ * @segs: array of one or more packet segments that describe the flow
+ * @segs_cnt: number of packet segments provided
+ * @vsi_handle: software VSI handle to check VSI (ICE_FLOW_FIND_PROF_CHK_VSI)
+ * @conds: additional conditions to be checked (ICE_FLOW_FIND_PROF_CHK_*)
+ */
+static struct ice_flow_prof *
+ice_flow_find_prof_conds(struct ice_hw *hw, enum ice_block blk,
+			 enum ice_flow_dir dir, struct ice_flow_seg_info *segs,
+			 u8 segs_cnt, u16 vsi_handle, u32 conds)
+{
+	struct ice_flow_prof *p, *prof = NULL;
+
+	mutex_lock(&hw->fl_profs_locks[blk]);
+	list_for_each_entry(p, &hw->fl_profs[blk], l_entry)
+		if ((p->dir == dir || conds & ICE_FLOW_FIND_PROF_NOT_CHK_DIR) &&
+		    segs_cnt && segs_cnt == p->segs_cnt) {
+			u8 i;
+
+			/* Check for profile-VSI association if specified */
+			if ((conds & ICE_FLOW_FIND_PROF_CHK_VSI) &&
+			    ice_is_vsi_valid(hw, vsi_handle) &&
+			    !test_bit(vsi_handle, p->vsis))
+				continue;
+
+			/* Protocol headers must be checked. Matched fields are
+			 * checked if specified.
+			 */
+			for (i = 0; i < segs_cnt; i++)
+				if (segs[i].hdrs != p->segs[i].hdrs ||
+				    ((conds & ICE_FLOW_FIND_PROF_CHK_FLDS) &&
+				     segs[i].match != p->segs[i].match))
+					break;
+
+			/* A match is found if all segments are matched */
+			if (i == segs_cnt) {
+				prof = p;
+				break;
+			}
+		}
+	mutex_unlock(&hw->fl_profs_locks[blk]);
+
+	return prof;
+}
+
+/**
+ * ice_flow_find_prof_id - Look up a profile with given profile ID
+ * @hw: pointer to the HW struct
+ * @blk: classification stage
+ * @prof_id: unique ID to identify this flow profile
+ */
+static struct ice_flow_prof *
+ice_flow_find_prof_id(struct ice_hw *hw, enum ice_block blk, u64 prof_id)
+{
+	struct ice_flow_prof *p;
+
+	list_for_each_entry(p, &hw->fl_profs[blk], l_entry)
+		if (p->id == prof_id)
+			return p;
+
+	return NULL;
+}
+
 /**
  * ice_flow_add_prof_sync - Add a flow profile for packet segments and fields
  * @hw: pointer to the HW struct
@@ -451,6 +522,31 @@ out:
 }
 
 /**
+ * ice_flow_rem_prof_sync - remove a flow profile
+ * @hw: pointer to the hardware structure
+ * @blk: classification stage
+ * @prof: pointer to flow profile to remove
+ *
+ * Assumption: the caller has acquired the lock to the profile list
+ */
+static enum ice_status
+ice_flow_rem_prof_sync(struct ice_hw *hw, enum ice_block blk,
+		       struct ice_flow_prof *prof)
+{
+	enum ice_status status;
+
+	/* Remove all hardware profiles associated with this flow profile */
+	status = ice_rem_prof(hw, blk, prof->id);
+	if (!status) {
+		list_del(&prof->l_entry);
+		mutex_destroy(&prof->entries_lock);
+		devm_kfree(ice_hw_to_dev(hw), prof);
+	}
+
+	return status;
+}
+
+/**
  * ice_flow_assoc_prof - associate a VSI with a flow profile
  * @hw: pointer to the hardware structure
  * @blk: classification stage
@@ -483,6 +579,38 @@ ice_flow_assoc_prof(struct ice_hw *hw, enum ice_block blk,
 }
 
 /**
+ * ice_flow_disassoc_prof - disassociate a VSI from a flow profile
+ * @hw: pointer to the hardware structure
+ * @blk: classification stage
+ * @prof: pointer to flow profile
+ * @vsi_handle: software VSI handle
+ *
+ * Assumption: the caller has acquired the lock to the profile list
+ * and the software VSI handle has been validated
+ */
+static enum ice_status
+ice_flow_disassoc_prof(struct ice_hw *hw, enum ice_block blk,
+		       struct ice_flow_prof *prof, u16 vsi_handle)
+{
+	enum ice_status status = 0;
+
+	if (test_bit(vsi_handle, prof->vsis)) {
+		status = ice_rem_prof_id_flow(hw, blk,
+					      ice_get_hw_vsi_num(hw,
+								 vsi_handle),
+					      prof->id);
+		if (!status)
+			clear_bit(vsi_handle, prof->vsis);
+		else
+			ice_debug(hw, ICE_DBG_FLOW,
+				  "HW profile remove failed, %d\n",
+				  status);
+	}
+
+	return status;
+}
+
+/**
  * ice_flow_add_prof - Add a flow profile for packet segments and matched fields
  * @hw: pointer to the HW struct
  * @blk: classification stage
@@ -525,6 +653,35 @@ ice_flow_add_prof(struct ice_hw *hw, enum ice_block blk, enum ice_flow_dir dir,
 }
 
 /**
+ * ice_flow_rem_prof - Remove a flow profile and all entries associated with it
+ * @hw: pointer to the HW struct
+ * @blk: the block for which the flow profile is to be removed
+ * @prof_id: unique ID of the flow profile to be removed
+ */
+static enum ice_status
+ice_flow_rem_prof(struct ice_hw *hw, enum ice_block blk, u64 prof_id)
+{
+	struct ice_flow_prof *prof;
+	enum ice_status status;
+
+	mutex_lock(&hw->fl_profs_locks[blk]);
+
+	prof = ice_flow_find_prof_id(hw, blk, prof_id);
+	if (!prof) {
+		status = ICE_ERR_DOES_NOT_EXIST;
+		goto out;
+	}
+
+	/* prof becomes invalid after the call */
+	status = ice_flow_rem_prof_sync(hw, blk, prof);
+
+out:
+	mutex_unlock(&hw->fl_profs_locks[blk]);
+
+	return status;
+}
+
+/**
  * ice_flow_set_fld_ext - specifies locations of field from entry's input buffer
  * @seg: packet segment the field being set belongs to
  * @fld: field to be set
@@ -645,6 +802,132 @@ ice_flow_set_rss_seg_info(struct ice_flow_seg_info *segs, u64 hash_fields,
 	return 0;
 }
 
+/**
+ * ice_rem_vsi_rss_list - remove VSI from RSS list
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ *
+ * Remove the VSI from all RSS configurations in the list.
+ */
+void ice_rem_vsi_rss_list(struct ice_hw *hw, u16 vsi_handle)
+{
+	struct ice_rss_cfg *r, *tmp;
+
+	if (list_empty(&hw->rss_list_head))
+		return;
+
+	mutex_lock(&hw->rss_locks);
+	list_for_each_entry_safe(r, tmp, &hw->rss_list_head, l_entry)
+		if (test_and_clear_bit(vsi_handle, r->vsis))
+			if (bitmap_empty(r->vsis, ICE_MAX_VSI)) {
+				list_del(&r->l_entry);
+				devm_kfree(ice_hw_to_dev(hw), r);
+			}
+	mutex_unlock(&hw->rss_locks);
+}
+
+/**
+ * ice_rem_vsi_rss_cfg - remove RSS configurations associated with VSI
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ *
+ * This function will iterate through all flow profiles and disassociate
+ * the VSI from that profile. If the flow profile has no VSIs it will
+ * be removed.
+ */
+enum ice_status ice_rem_vsi_rss_cfg(struct ice_hw *hw, u16 vsi_handle)
+{
+	const enum ice_block blk = ICE_BLK_RSS;
+	struct ice_flow_prof *p, *t;
+	enum ice_status status = 0;
+
+	if (!ice_is_vsi_valid(hw, vsi_handle))
+		return ICE_ERR_PARAM;
+
+	if (list_empty(&hw->fl_profs[blk]))
+		return 0;
+
+	mutex_lock(&hw->fl_profs_locks[blk]);
+	list_for_each_entry_safe(p, t, &hw->fl_profs[blk], l_entry)
+		if (test_bit(vsi_handle, p->vsis)) {
+			status = ice_flow_disassoc_prof(hw, blk, p, vsi_handle);
+			if (status)
+				break;
+
+			if (bitmap_empty(p->vsis, ICE_MAX_VSI)) {
+				status = ice_flow_rem_prof_sync(hw, blk, p);
+				if (status)
+					break;
+			}
+		}
+	mutex_unlock(&hw->fl_profs_locks[blk]);
+
+	return status;
+}
+
+/**
+ * ice_rem_rss_list - remove RSS configuration from list
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ * @prof: pointer to flow profile
+ *
+ * Assumption: lock has already been acquired for RSS list
+ */
+static void
+ice_rem_rss_list(struct ice_hw *hw, u16 vsi_handle, struct ice_flow_prof *prof)
+{
+	struct ice_rss_cfg *r, *tmp;
+
+	/* Search for RSS hash fields associated to the VSI that match the
+	 * hash configurations associated to the flow profile. If found
+	 * remove from the RSS entry list of the VSI context and delete entry.
+	 */
+	list_for_each_entry_safe(r, tmp, &hw->rss_list_head, l_entry)
+		if (r->hashed_flds == prof->segs[prof->segs_cnt - 1].match &&
+		    r->packet_hdr == prof->segs[prof->segs_cnt - 1].hdrs) {
+			clear_bit(vsi_handle, r->vsis);
+			if (bitmap_empty(r->vsis, ICE_MAX_VSI)) {
+				list_del(&r->l_entry);
+				devm_kfree(ice_hw_to_dev(hw), r);
+			}
+			return;
+		}
+}
+
+/**
+ * ice_add_rss_list - add RSS configuration to list
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ * @prof: pointer to flow profile
+ *
+ * Assumption: lock has already been acquired for RSS list
+ */
+static enum ice_status
+ice_add_rss_list(struct ice_hw *hw, u16 vsi_handle, struct ice_flow_prof *prof)
+{
+	struct ice_rss_cfg *r, *rss_cfg;
+
+	list_for_each_entry(r, &hw->rss_list_head, l_entry)
+		if (r->hashed_flds == prof->segs[prof->segs_cnt - 1].match &&
+		    r->packet_hdr == prof->segs[prof->segs_cnt - 1].hdrs) {
+			set_bit(vsi_handle, r->vsis);
+			return 0;
+		}
+
+	rss_cfg = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*rss_cfg),
+			       GFP_KERNEL);
+	if (!rss_cfg)
+		return ICE_ERR_NO_MEMORY;
+
+	rss_cfg->hashed_flds = prof->segs[prof->segs_cnt - 1].match;
+	rss_cfg->packet_hdr = prof->segs[prof->segs_cnt - 1].hdrs;
+	set_bit(vsi_handle, rss_cfg->vsis);
+
+	list_add_tail(&rss_cfg->l_entry, &hw->rss_list_head);
+
+	return 0;
+}
+
 #define ICE_FLOW_PROF_HASH_S	0
 #define ICE_FLOW_PROF_HASH_M	(0xFFFFFFFFULL << ICE_FLOW_PROF_HASH_S)
 #define ICE_FLOW_PROF_HDR_S	32
@@ -696,6 +979,52 @@ ice_add_rss_cfg_sync(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
 	if (status)
 		goto exit;
 
+	/* Search for a flow profile that has matching headers, hash fields
+	 * and has the input VSI associated to it. If found, no further
+	 * operations required and exit.
+	 */
+	prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt,
+					vsi_handle,
+					ICE_FLOW_FIND_PROF_CHK_FLDS |
+					ICE_FLOW_FIND_PROF_CHK_VSI);
+	if (prof)
+		goto exit;
+
+	/* Check if a flow profile exists with the same protocol headers and
+	 * associated with the input VSI. If so disassociate the VSI from
+	 * this profile. The VSI will be added to a new profile created with
+	 * the protocol header and new hash field configuration.
+	 */
+	prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt,
+					vsi_handle, ICE_FLOW_FIND_PROF_CHK_VSI);
+	if (prof) {
+		status = ice_flow_disassoc_prof(hw, blk, prof, vsi_handle);
+		if (!status)
+			ice_rem_rss_list(hw, vsi_handle, prof);
+		else
+			goto exit;
+
+		/* Remove profile if it has no VSIs associated */
+		if (bitmap_empty(prof->vsis, ICE_MAX_VSI)) {
+			status = ice_flow_rem_prof(hw, blk, prof->id);
+			if (status)
+				goto exit;
+		}
+	}
+
+	/* Search for a profile that has same match fields only. If this
+	 * exists then associate the VSI to this profile.
+	 */
+	prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt,
+					vsi_handle,
+					ICE_FLOW_FIND_PROF_CHK_FLDS);
+	if (prof) {
+		status = ice_flow_assoc_prof(hw, blk, prof, vsi_handle);
+		if (!status)
+			status = ice_add_rss_list(hw, vsi_handle, prof);
+		goto exit;
+	}
+
 	/* Create a new flow profile with generated profile and packet
 	 * segment information.
 	 */
@@ -708,6 +1037,15 @@ ice_add_rss_cfg_sync(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
 		goto exit;
 
 	status = ice_flow_assoc_prof(hw, blk, prof, vsi_handle);
+	/* If association to a new flow profile failed then this profile can
+	 * be removed.
+	 */
+	if (status) {
+		ice_flow_rem_prof(hw, blk, prof->id);
+		goto exit;
+	}
+
+	status = ice_add_rss_list(hw, vsi_handle, prof);
 
 exit:
 	kfree(segs);
diff --git a/drivers/net/ethernet/intel/ice/ice_flow.h b/drivers/net/ethernet/intel/ice/ice_flow.h
index 05b0dab4793c..38669b077209 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.h
+++ b/drivers/net/ethernet/intel/ice/ice_flow.h
@@ -4,6 +4,7 @@
 #ifndef _ICE_FLOW_H_
 #define _ICE_FLOW_H_
 
+#define ICE_FLOW_ENTRY_HANDLE_INVAL	0
 #define ICE_FLOW_FLD_OFF_INVAL		0xffff
 
 /* Generate flow hash field from flow field type(s) */
@@ -60,6 +61,12 @@ enum ice_flow_dir {
 	ICE_FLOW_RX		= 0x02,
 };
 
+enum ice_flow_priority {
+	ICE_FLOW_PRIO_LOW,
+	ICE_FLOW_PRIO_NORMAL,
+	ICE_FLOW_PRIO_HIGH
+};
+
 #define ICE_FLOW_SEG_MAX		2
 #define ICE_FLOW_FV_EXTRACT_SZ		2
 
@@ -130,7 +137,10 @@ struct ice_rss_cfg {
 	u32 packet_hdr;
 };
 
+enum ice_status ice_flow_rem_entry(struct ice_hw *hw, u64 entry_h);
+void ice_rem_vsi_rss_list(struct ice_hw *hw, u16 vsi_handle);
 enum ice_status ice_replay_rss_cfg(struct ice_hw *hw, u16 vsi_handle);
+enum ice_status ice_rem_vsi_rss_cfg(struct ice_hw *hw, u16 vsi_handle);
 enum ice_status
 ice_add_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
 		u32 addl_hdrs);
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index dd230c6664ee..caa3edd5d3d6 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -494,7 +494,28 @@ bool ice_is_safe_mode(struct ice_pf *pf)
 }
 
 /**
- * ice_rss_clean - Delete RSS related VSI structures that hold user inputs
+ * ice_vsi_clean_rss_flow_fld - Delete RSS configuration
+ * @vsi: the VSI being cleaned up
+ *
+ * This function deletes RSS input set for all flows that were configured
+ * for this VSI
+ */
+static void ice_vsi_clean_rss_flow_fld(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	enum ice_status status;
+
+	if (ice_is_safe_mode(pf))
+		return;
+
+	status = ice_rem_vsi_rss_cfg(&pf->hw, vsi->idx);
+	if (status)
+		dev_dbg(ice_pf_to_dev(pf), "ice_rem_vsi_rss_cfg failed for vsi = %d, error = %d\n",
+			vsi->vsi_num, status);
+}
+
+/**
+ * ice_rss_clean - Delete RSS related VSI structures and configuration
  * @vsi: the VSI being removed
  */
 static void ice_rss_clean(struct ice_vsi *vsi)
@@ -508,6 +529,11 @@ static void ice_rss_clean(struct ice_vsi *vsi)
 		devm_kfree(dev, vsi->rss_hkey_user);
 	if (vsi->rss_lut_user)
 		devm_kfree(dev, vsi->rss_lut_user);
+
+	ice_vsi_clean_rss_flow_fld(vsi);
+	/* remove RSS replay list */
+	if (!ice_is_safe_mode(pf))
+		ice_rem_vsi_rss_list(&pf->hw, vsi->idx);
 }
 
 /**