ice: Allocate flow profile

Create an extraction sequence based on the packet header protocols to be
programmed and allocate a flow profile for the extraction sequence.
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>

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

@@ -232,6 +232,12 @@ struct ice_aqc_get_sw_cfg_resp {
  */
 #define ICE_AQC_RES_TYPE_VSI_LIST_REP			0x03
 #define ICE_AQC_RES_TYPE_VSI_LIST_PRUNE			0x04
+#define ICE_AQC_RES_TYPE_HASH_PROF_BLDR_PROFID		0x60
+
+#define ICE_AQC_RES_TYPE_FLAG_SCAN_BOTTOM		BIT(12)
+#define ICE_AQC_RES_TYPE_FLAG_IGNORE_INDEX		BIT(13)
+
+#define ICE_AQC_RES_TYPE_FLAG_DEDICATED			0x00
 
 /* Allocate Resources command (indirect 0x0208)
  * Free Resources command (indirect 0x0209)

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

@@ -1497,6 +1497,81 @@ void ice_release_res(struct ice_hw *hw, enum ice_aq_res_ids res)
 	}
 }
 
+/**
+ * ice_aq_alloc_free_res - command to allocate/free resources
+ * @hw: pointer to the HW struct
+ * @num_entries: number of resource entries in buffer
+ * @buf: Indirect buffer to hold data parameters and response
+ * @buf_size: size of buffer for indirect commands
+ * @opc: pass in the command opcode
+ * @cd: pointer to command details structure or NULL
+ *
+ * Helper function to allocate/free resources using the admin queue commands
+ */
+enum ice_status
+ice_aq_alloc_free_res(struct ice_hw *hw, u16 num_entries,
+		      struct ice_aqc_alloc_free_res_elem *buf, u16 buf_size,
+		      enum ice_adminq_opc opc, struct ice_sq_cd *cd)
+{
+	struct ice_aqc_alloc_free_res_cmd *cmd;
+	struct ice_aq_desc desc;
+
+	cmd = &desc.params.sw_res_ctrl;
+
+	if (!buf)
+		return ICE_ERR_PARAM;
+
+	if (buf_size < (num_entries * sizeof(buf->elem[0])))
+		return ICE_ERR_PARAM;
+
+	ice_fill_dflt_direct_cmd_desc(&desc, opc);
+
+	desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
+
+	cmd->num_entries = cpu_to_le16(num_entries);
+
+	return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
+}
+
+/**
+ * ice_alloc_hw_res - allocate resource
+ * @hw: pointer to the HW struct
+ * @type: type of resource
+ * @num: number of resources to allocate
+ * @btm: allocate from bottom
+ * @res: pointer to array that will receive the resources
+ */
+enum ice_status
+ice_alloc_hw_res(struct ice_hw *hw, u16 type, u16 num, bool btm, u16 *res)
+{
+	struct ice_aqc_alloc_free_res_elem *buf;
+	enum ice_status status;
+	u16 buf_len;
+
+	buf_len = struct_size(buf, elem, num - 1);
+	buf = kzalloc(buf_len, GFP_KERNEL);
+	if (!buf)
+		return ICE_ERR_NO_MEMORY;
+
+	/* Prepare buffer to allocate resource. */
+	buf->num_elems = cpu_to_le16(num);
+	buf->res_type = cpu_to_le16(type | ICE_AQC_RES_TYPE_FLAG_DEDICATED |
+				    ICE_AQC_RES_TYPE_FLAG_IGNORE_INDEX);
+	if (btm)
+		buf->res_type |= cpu_to_le16(ICE_AQC_RES_TYPE_FLAG_SCAN_BOTTOM);
+
+	status = ice_aq_alloc_free_res(hw, 1, buf, buf_len,
+				       ice_aqc_opc_alloc_res, NULL);
+	if (status)
+		goto ice_alloc_res_exit;
+
+	memcpy(res, buf->elem, sizeof(buf->elem) * num);
+
+ice_alloc_res_exit:
+	kfree(buf);
+	return status;
+}
+
 /**
  * ice_get_num_per_func - determine number of resources per PF
  * @hw: pointer to the HW structure

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

@@ -34,10 +34,16 @@ enum ice_status
 ice_acquire_res(struct ice_hw *hw, enum ice_aq_res_ids res,
 		enum ice_aq_res_access_type access, u32 timeout);
 void ice_release_res(struct ice_hw *hw, enum ice_aq_res_ids res);
+enum ice_status
+ice_alloc_hw_res(struct ice_hw *hw, u16 type, u16 num, bool btm, u16 *res);
 enum ice_status ice_init_nvm(struct ice_hw *hw);
 enum ice_status
 ice_read_sr_buf(struct ice_hw *hw, u16 offset, u16 *words, u16 *data);
 enum ice_status
+ice_aq_alloc_free_res(struct ice_hw *hw, u16 num_entries,
+		      struct ice_aqc_alloc_free_res_elem *buf, u16 buf_size,
+		      enum ice_adminq_opc opc, struct ice_sq_cd *cd);
+enum ice_status
 ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 		struct ice_aq_desc *desc, void *buf, u16 buf_size,
 		struct ice_sq_cd *cd);

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

@@ -1118,6 +1118,117 @@ ice_vsig_add_mv_vsi(struct ice_hw *hw, enum ice_block blk, u16 vsi, u16 vsig)
 	return 0;
 }
 
+/**
+ * ice_find_prof_id - find profile ID for a given field vector
+ * @hw: pointer to the hardware structure
+ * @blk: HW block
+ * @fv: field vector to search for
+ * @prof_id: receives the profile ID
+ */
+static enum ice_status
+ice_find_prof_id(struct ice_hw *hw, enum ice_block blk,
+		 struct ice_fv_word *fv, u8 *prof_id)
+{
+	struct ice_es *es = &hw->blk[blk].es;
+	u16 off, i;
+
+	for (i = 0; i < es->count; i++) {
+		off = i * es->fvw;
+
+		if (memcmp(&es->t[off], fv, es->fvw * sizeof(*fv)))
+			continue;
+
+		*prof_id = i;
+		return 0;
+	}
+
+	return ICE_ERR_DOES_NOT_EXIST;
+}
+
+/**
+ * ice_prof_id_rsrc_type - get profile ID resource type for a block type
+ * @blk: the block type
+ * @rsrc_type: pointer to variable to receive the resource type
+ */
+static bool ice_prof_id_rsrc_type(enum ice_block blk, u16 *rsrc_type)
+{
+	switch (blk) {
+	case ICE_BLK_RSS:
+		*rsrc_type = ICE_AQC_RES_TYPE_HASH_PROF_BLDR_PROFID;
+		break;
+	default:
+		return false;
+	}
+	return true;
+}
+
+/**
+ * ice_alloc_prof_id - allocate profile ID
+ * @hw: pointer to the HW struct
+ * @blk: the block to allocate the profile ID for
+ * @prof_id: pointer to variable to receive the profile ID
+ *
+ * This function allocates a new profile ID, which also corresponds to a Field
+ * Vector (Extraction Sequence) entry.
+ */
+static enum ice_status
+ice_alloc_prof_id(struct ice_hw *hw, enum ice_block blk, u8 *prof_id)
+{
+	enum ice_status status;
+	u16 res_type;
+	u16 get_prof;
+
+	if (!ice_prof_id_rsrc_type(blk, &res_type))
+		return ICE_ERR_PARAM;
+
+	status = ice_alloc_hw_res(hw, res_type, 1, false, &get_prof);
+	if (!status)
+		*prof_id = (u8)get_prof;
+
+	return status;
+}
+
+/**
+ * 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
+ * @prof_id: the profile ID for which to increment the reference count
+ */
+static enum ice_status
+ice_prof_inc_ref(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
+{
+	if (prof_id > hw->blk[blk].es.count)
+		return ICE_ERR_PARAM;
+
+	hw->blk[blk].es.ref_count[prof_id]++;
+
+	return 0;
+}
+
+/**
+ * ice_write_es - write an extraction sequence to hardware
+ * @hw: pointer to the HW struct
+ * @blk: the block in which to write the extraction sequence
+ * @prof_id: the profile ID to write
+ * @fv: pointer to the extraction sequence to write - NULL to clear extraction
+ */
+static void
+ice_write_es(struct ice_hw *hw, enum ice_block blk, u8 prof_id,
+	     struct ice_fv_word *fv)
+{
+	u16 off;
+
+	off = prof_id * hw->blk[blk].es.fvw;
+	if (!fv) {
+		memset(&hw->blk[blk].es.t[off], 0,
+		       hw->blk[blk].es.fvw * sizeof(*fv));
+		hw->blk[blk].es.written[prof_id] = false;
+	} else {
+		memcpy(&hw->blk[blk].es.t[off], fv,
+		       hw->blk[blk].es.fvw * sizeof(*fv));
+	}
+}
+
 /* Block / table section IDs */
 static const u32 ice_blk_sids[ICE_BLK_COUNT][ICE_SID_OFF_COUNT] = {
 	/* SWITCH */
@@ -1576,3 +1687,108 @@ enum ice_status ice_init_hw_tbls(struct ice_hw *hw)
 	ice_free_hw_tbls(hw);
 	return ICE_ERR_NO_MEMORY;
 }
+
+/**
+ * ice_add_prof - add profile
+ * @hw: pointer to the HW struct
+ * @blk: hardware block
+ * @id: profile tracking ID
+ * @ptypes: array of bitmaps indicating ptypes (ICE_FLOW_PTYPE_MAX bits)
+ * @es: extraction sequence (length of array is determined by the block)
+ *
+ * This function registers a profile, which matches a set of PTGs with a
+ * particular extraction sequence. While the hardware profile is allocated
+ * it will not be written until the first call to ice_add_flow that specifies
+ * the ID value used here.
+ */
+enum ice_status
+ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
+	     struct ice_fv_word *es)
+{
+	u32 bytes = DIV_ROUND_UP(ICE_FLOW_PTYPE_MAX, BITS_PER_BYTE);
+	DECLARE_BITMAP(ptgs_used, ICE_XLT1_CNT);
+	struct ice_prof_map *prof;
+	enum ice_status status;
+	u32 byte = 0;
+	u8 prof_id;
+
+	bitmap_zero(ptgs_used, ICE_XLT1_CNT);
+
+	mutex_lock(&hw->blk[blk].es.prof_map_lock);
+
+	/* search for existing profile */
+	status = ice_find_prof_id(hw, blk, es, &prof_id);
+	if (status) {
+		/* allocate profile ID */
+		status = ice_alloc_prof_id(hw, blk, &prof_id);
+		if (status)
+			goto err_ice_add_prof;
+
+		/* and write new es */
+		ice_write_es(hw, blk, prof_id, es);
+	}
+
+	ice_prof_inc_ref(hw, blk, prof_id);
+
+	/* add profile info */
+	prof = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*prof), GFP_KERNEL);
+	if (!prof)
+		goto err_ice_add_prof;
+
+	prof->profile_cookie = id;
+	prof->prof_id = prof_id;
+	prof->ptg_cnt = 0;
+	prof->context = 0;
+
+	/* build list of ptgs */
+	while (bytes && prof->ptg_cnt < ICE_MAX_PTG_PER_PROFILE) {
+		u32 bit;
+
+		if (!ptypes[byte]) {
+			bytes--;
+			byte++;
+			continue;
+		}
+
+		/* Examine 8 bits per byte */
+		for_each_set_bit(bit, (unsigned long *)&ptypes[byte],
+				 BITS_PER_BYTE) {
+			u16 ptype;
+			u8 ptg;
+			u8 m;
+
+			ptype = byte * BITS_PER_BYTE + bit;
+
+			/* The package should place all ptypes in a non-zero
+			 * PTG, so the following call should never fail.
+			 */
+			if (ice_ptg_find_ptype(hw, blk, ptype, &ptg))
+				continue;
+
+			/* If PTG is already added, skip and continue */
+			if (test_bit(ptg, ptgs_used))
+				continue;
+
+			set_bit(ptg, ptgs_used);
+			prof->ptg[prof->ptg_cnt] = ptg;
+
+			if (++prof->ptg_cnt >= ICE_MAX_PTG_PER_PROFILE)
+				break;
+
+			/* nothing left in byte, then exit */
+			m = ~((1 << (bit + 1)) - 1);
+			if (!(ptypes[byte] & m))
+				break;
+		}
+
+		bytes--;
+		byte++;
+	}
+
+	list_add(&prof->list, &hw->blk[blk].es.prof_map);
+	status = 0;
+
+err_ice_add_prof:
+	mutex_unlock(&hw->blk[blk].es.prof_map_lock);
+	return status;
+}

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

@@ -18,6 +18,9 @@
 
 #define ICE_PKG_CNT 4
 
+enum ice_status
+ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
+	     struct ice_fv_word *es);
 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);

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

@@ -3,6 +3,9 @@
 
 #ifndef _ICE_FLEX_TYPE_H_
 #define _ICE_FLEX_TYPE_H_
+
+#define ICE_FV_OFFSET_INVAL	0x1FF
+
 /* Extraction Sequence (Field Vector) Table */
 struct ice_fv_word {
 	u8 prot_id;
@@ -280,6 +283,17 @@ struct ice_ptg_ptype {
 	u8 ptg;
 };
 
+#define ICE_MAX_PTG_PER_PROFILE		32
+
+struct ice_prof_map {
+	struct list_head list;
+	u64 profile_cookie;
+	u64 context;
+	u8 prof_id;
+	u8 ptg_cnt;
+	u8 ptg[ICE_MAX_PTG_PER_PROFILE];
+};
+
 struct ice_vsig_entry {
 	struct list_head prop_lst;
 	struct ice_vsig_vsi *first_vsi;
@@ -371,4 +385,5 @@ struct ice_blk_info {
 	u8 is_list_init;
 };
 
+#define ICE_FLOW_PTYPE_MAX		ICE_XLT1_CNT
 #endif /* _ICE_FLEX_TYPE_H_ */

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

@@ -56,7 +56,13 @@ enum ice_flow_field {
 	ICE_FLOW_FIELD_IDX_MAX
 };
 
+enum ice_flow_dir {
+	ICE_FLOW_RX		= 0x02,
+};
+
 #define ICE_FLOW_SEG_MAX		2
+#define ICE_FLOW_FV_EXTRACT_SZ		2
+
 #define ICE_FLOW_SET_HDRS(seg, val)	((seg)->hdrs |= (u32)(val))
 
 struct ice_flow_seg_xtrct {
@@ -99,6 +105,23 @@ struct ice_flow_seg_info {
 	struct ice_flow_fld_info fields[ICE_FLOW_FIELD_IDX_MAX];
 };
 
+struct ice_flow_prof {
+	struct list_head l_entry;
+
+	u64 id;
+	enum ice_flow_dir dir;
+	u8 segs_cnt;
+
+	/* Keep track of flow entries associated with this flow profile */
+	struct mutex entries_lock;
+	struct list_head entries;
+
+	struct ice_flow_seg_info segs[ICE_FLOW_SEG_MAX];
+
+	/* software VSI handles referenced by this flow profile */
+	DECLARE_BITMAP(vsis, ICE_MAX_VSI);
+};
+
 struct ice_rss_cfg {
 	struct list_head l_entry;
 	/* bitmap of VSIs added to the RSS entry */

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

@@ -199,6 +199,14 @@ enum ice_rxdid {
 /* Receive Flex Descriptor Rx opcode values */
 #define ICE_RX_OPC_MDID		0x01
 
+/* Receive Descriptor MDID values that access packet flags */
+enum ice_flex_mdid_pkt_flags {
+	ICE_RX_MDID_PKT_FLAGS_15_0	= 20,
+	ICE_RX_MDID_PKT_FLAGS_31_16,
+	ICE_RX_MDID_PKT_FLAGS_47_32,
+	ICE_RX_MDID_PKT_FLAGS_63_48,
+};
+
 /* Receive Descriptor MDID values */
 enum ice_flex_rx_mdid {
 	ICE_RX_MDID_FLOW_ID_LOWER	= 5,

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

+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2019, Intel Corporation. */
+
+#ifndef _ICE_PROTOCOL_TYPE_H_
+#define _ICE_PROTOCOL_TYPE_H_
+/* Decoders for ice_prot_id:
+ * - F: First
+ * - I: Inner
+ * - L: Last
+ * - O: Outer
+ * - S: Single
+ */
+enum ice_prot_id {
+	ICE_PROT_ID_INVAL	= 0,
+	ICE_PROT_IPV4_OF_OR_S	= 32,
+	ICE_PROT_IPV4_IL	= 33,
+	ICE_PROT_IPV6_OF_OR_S	= 40,
+	ICE_PROT_IPV6_IL	= 41,
+	ICE_PROT_TCP_IL		= 49,
+	ICE_PROT_UDP_IL_OR_S	= 53,
+	ICE_PROT_META_ID	= 255, /* when offset == metadata */
+	ICE_PROT_INVALID	= 255  /* when offset == ICE_FV_OFFSET_INVAL */
+};
+#endif /* _ICE_PROTOCOL_TYPE_H_ */

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

@@ -49,42 +49,6 @@ static const u8 dummy_eth_header[DUMMY_ETH_HDR_LEN] = { 0x2, 0, 0, 0, 0, 0,
 	 sizeof(((struct ice_sw_rule_vsi_list *)0)->vsi) + \
 	 ((n) * sizeof(((struct ice_sw_rule_vsi_list *)0)->vsi)))
 
-/**
- * ice_aq_alloc_free_res - command to allocate/free resources
- * @hw: pointer to the HW struct
- * @num_entries: number of resource entries in buffer
- * @buf: Indirect buffer to hold data parameters and response
- * @buf_size: size of buffer for indirect commands
- * @opc: pass in the command opcode
- * @cd: pointer to command details structure or NULL
- *
- * Helper function to allocate/free resources using the admin queue commands
- */
-static enum ice_status
-ice_aq_alloc_free_res(struct ice_hw *hw, u16 num_entries,
-		      struct ice_aqc_alloc_free_res_elem *buf, u16 buf_size,
-		      enum ice_adminq_opc opc, struct ice_sq_cd *cd)
-{
-	struct ice_aqc_alloc_free_res_cmd *cmd;
-	struct ice_aq_desc desc;
-
-	cmd = &desc.params.sw_res_ctrl;
-
-	if (!buf)
-		return ICE_ERR_PARAM;
-
-	if (buf_size < (num_entries * sizeof(buf->elem[0])))
-		return ICE_ERR_PARAM;
-
-	ice_fill_dflt_direct_cmd_desc(&desc, opc);
-
-	desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
-
-	cmd->num_entries = cpu_to_le16(num_entries);
-
-	return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
-}
-
 /**
  * ice_init_def_sw_recp - initialize the recipe book keeping tables
  * @hw: pointer to the HW struct

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

@@ -13,6 +13,7 @@
 #include "ice_controlq.h"
 #include "ice_lan_tx_rx.h"
 #include "ice_flex_type.h"
+#include "ice_protocol_type.h"
 
 static inline bool ice_is_tc_ena(unsigned long bitmap, u8 tc)
 {
@@ -41,6 +42,7 @@ static inline u32 ice_round_to_num(u32 N, u32 R)
 #define ICE_DBG_QCTX		BIT_ULL(6)
 #define ICE_DBG_NVM		BIT_ULL(7)
 #define ICE_DBG_LAN		BIT_ULL(8)
+#define ICE_DBG_FLOW		BIT_ULL(9)
 #define ICE_DBG_SW		BIT_ULL(13)
 #define ICE_DBG_SCHED		BIT_ULL(14)
 #define ICE_DBG_PKG		BIT_ULL(16)