ice: create advanced switch recipe

These changes introduce code for creating advanced recipes for the
switch in hardware.

There are a couple of recipes already defined in the HW. They apply to
matching on basic protocol headers, like MAC, VLAN, MACVLAN,
ethertype or direction (promiscuous), etc.. If the user wants to match on
other protocol headers (eg. ip address, src/dst port etc.) or different
variation of already supported protocols, there is a need to create
new, more complex recipe. That new recipe is referred as
'advanced recipe', and the filtering rule created on top of that recipe
is called 'advanced rule'.

One recipe can have up to 5 words, but the first word is always reserved
for match on switch id, so the driver can define up to 4 words for one
recipe. To support recipes with more words up to 5 recipes can be
chained, so 20 words can be programmed for look up.

Input for adding recipe function is a list of protocols to support. Based
on this list correct profile is being chosen. Correct profile means
that it contains all protocol types from a list. Each profile have up to
48 field vector words and each of this word have protocol id and offset.
These two fields need to match with input data for adding recipe
function. If the correct profile can't be found the function returns an
error.

The next step after finding the correct profile is grouping words into
groups. One group can have up to 4 words. This is done to simplify
sending recipes to HW (because recipe also can have up to 4 words).

In case of chaining (so when look up consists of more than 4 words) last
recipe will always have results from the previous recipes used as words.

A recipe to profile map is used to store information about which profile
is associate with this recipe. This map is an array of 64 elements (max
number of recipes) and each element is a 256 bits bitmap (max number of
profiles)

Profile to recipe map is used to store information about which recipe is
associate with this profile. This map is an array of 256 elements (max
number of profiles) and each element is a 64 bits bitmap (max number of
recipes)

Signed-off-by: Dan Nowlin <dan.nowlin@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 95 insertions, 15 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.h b/drivers/net/ethernet/intel/ice/ice_switch.h
index e6eeffb3dde9..6fd4537106ed 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.h
+++ b/drivers/net/ethernet/intel/ice/ice_switch.h
@@ -125,30 +125,110 @@ struct ice_fltr_info {
 	u8 lan_en;	/* Indicate if packet can be forwarded to the uplink */
 };
 
+struct ice_adv_lkup_elem {
+	enum ice_protocol_type type;
+	union ice_prot_hdr h_u;	/* Header values */
+	union ice_prot_hdr m_u;	/* Mask of header values to match */
+};
+
+struct ice_sw_act_ctrl {
+	/* Source VSI for LOOKUP_TX or source port for LOOKUP_RX */
+	u16 src;
+	u16 flag;
+	enum ice_sw_fwd_act_type fltr_act;
+	/* Depending on filter action */
+	union {
+		/* This is a queue ID in case of ICE_FWD_TO_Q and starting
+		 * queue ID in case of ICE_FWD_TO_QGRP.
+		 */
+		u16 q_id:11;
+		u16 vsi_id:10;
+		u16 hw_vsi_id:10;
+		u16 vsi_list_id:10;
+	} fwd_id;
+	/* software VSI handle */
+	u16 vsi_handle;
+	u8 qgrp_size;
+};
+
+struct ice_rule_query_data {
+	/* Recipe ID for which the requested rule was added */
+	u16 rid;
+	/* Rule ID that was added or is supposed to be removed */
+	u16 rule_id;
+	/* vsi_handle for which Rule was added or is supposed to be removed */
+	u16 vsi_handle;
+};
+
+struct ice_adv_rule_info {
+	struct ice_sw_act_ctrl sw_act;
+	u32 priority;
+	u8 rx; /* true means LOOKUP_RX otherwise LOOKUP_TX */
+	u16 fltr_rule_id;
+};
+
+/* A collection of one or more four word recipe */
 struct ice_sw_recipe {
-	struct list_head l_entry;
+	/* For a chained recipe the root recipe is what should be used for
+	 * programming rules
+	 */
+	u8 is_root;
+	u8 root_rid;
+	u8 recp_created;
 
-	/* To protect modification of filt_rule list
-	 * defined below
+	/* Number of extraction words */
+	u8 n_ext_words;
+	/* Protocol ID and Offset pair (extraction word) to describe the
+	 * recipe
 	 */
-	struct mutex filt_rule_lock;
+	struct ice_fv_word ext_words[ICE_MAX_CHAIN_WORDS];
+	u16 word_masks[ICE_MAX_CHAIN_WORDS];
+
+	/* if this recipe is a collection of other recipe */
+	u8 big_recp;
+
+	/* if this recipe is part of another bigger recipe then chain index
+	 * corresponding to this recipe
+	 */
+	u8 chain_idx;
+
+	/* if this recipe is a collection of other recipe then count of other
+	 * recipes and recipe IDs of those recipes
+	 */
+	u8 n_grp_count;
+
+	/* Bit map specifying the IDs associated with this group of recipe */
+	DECLARE_BITMAP(r_bitmap, ICE_MAX_NUM_RECIPES);
 
-	/* List of type ice_fltr_mgmt_list_entry */
+	/* List of type ice_fltr_mgmt_list_entry or adv_rule */
+	u8 adv_rule;
 	struct list_head filt_rules;
 	struct list_head filt_replay_rules;
 
-	/* linked list of type recipe_list_entry */
-	struct list_head rg_list;
-	/* linked list of type ice_sw_fv_list_entry*/
+	struct mutex filt_rule_lock;	/* protect filter rule structure */
+
+	/* Profiles this recipe should be associated with */
 	struct list_head fv_list;
-	struct ice_aqc_recipe_data_elem *r_buf;
-	u8 recp_count;
-	u8 root_rid;
-	u8 num_profs;
-	u8 *prof_ids;
 
-	/* recipe bitmap: what all recipes makes this recipe */
-	DECLARE_BITMAP(r_bitmap, ICE_MAX_NUM_RECIPES);
+	/* Profiles this recipe is associated with */
+	u8 num_profs, *prof_ids;
+
+	/* Bit map for possible result indexes */
+	DECLARE_BITMAP(res_idxs, ICE_MAX_FV_WORDS);
+
+	/* This allows user to specify the recipe priority.
+	 * For now, this becomes 'fwd_priority' when recipe
+	 * is created, usually recipes can have 'fwd' and 'join'
+	 * priority.
+	 */
+	u8 priority;
+
+	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;
 };
 
 /* Bookkeeping structure to hold bitmap of VSIs corresponding to VSI list ID */