/* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2019-2020 Broadcom
+ * Copyright(c) 2019-2021 Broadcom
* All rights reserved.
*/
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
-#include "hcapi/hcapi_cfa.h"
+#include "hcapi/hcapi_cfa_defs.h"
#include "tf_project.h"
/**
* and can be used in WC TCAM or EM keys to virtualize further
* lookups.
*/
- TF_IDENT_TYPE_L2_CTXT,
+ TF_IDENT_TYPE_L2_CTXT_HIGH,
+ /**
+ * The L2 Context is returned from the L2 Ctxt TCAM lookup
+ * and can be used in WC TCAM or EM keys to virtualize further
+ * lookups.
+ */
+ TF_IDENT_TYPE_L2_CTXT_LOW,
/**
* The WC profile func is returned from the L2 Ctxt TCAM lookup
* to enable virtualization of the profile TCAM.
/** Wh+/SR Action Modify L4 Dest Port */
TF_TBL_TYPE_ACT_MODIFY_DPORT,
/** Wh+/SR Action Modify IPv4 Source */
- TF_TBL_TYPE_ACT_MODIFY_IPV4_SRC,
- /** Wh+/SR Action _Modify L4 Dest Port */
- TF_TBL_TYPE_ACT_MODIFY_IPV4_DEST,
+ TF_TBL_TYPE_ACT_MODIFY_IPV4,
/** Meter Profiles */
TF_TBL_TYPE_METER_PROF,
/** Meter Instance */
*/
enum tf_tcam_tbl_type {
/** L2 Context TCAM */
- TF_TCAM_TBL_TYPE_L2_CTXT_TCAM,
+ TF_TCAM_TBL_TYPE_L2_CTXT_TCAM_HIGH,
+ /** L2 Context TCAM */
+ TF_TCAM_TBL_TYPE_L2_CTXT_TCAM_LOW,
/** Profile TCAM */
TF_TCAM_TBL_TYPE_PROF_TCAM,
/** Wildcard TCAM */
TF_TCAM_TBL_TYPE_MAX
};
+/**
+ * SEARCH STATUS
+ */
+enum tf_search_status {
+ /** The entry was not found, but an idx was allocated if requested. */
+ MISS,
+ /** The entry was found, and the result/idx are valid */
+ HIT,
+ /** The entry was not found and the table is full */
+ REJECT
+};
+
/**
* EM Resources
* These defines are provisioned during
*/
enum tf_identifier_type ident_type;
/**
- * [out] Identifier allocated
+ * [out] Allocated identifier
*/
- uint16_t id;
+ uint32_t id;
};
/**
/**
* [in] ID to free
*/
- uint16_t id;
+ uint32_t id;
+ /**
+ * (experimental)
+ * [out] Current refcnt after free
+ */
+ uint32_t ref_cnt;
+};
+
+/**
+ * tf_search_identifier parameter definition (experimental)
+ */
+struct tf_search_identifier_parms {
+ /**
+ * [in] receive or transmit direction
+ */
+ enum tf_dir dir;
+ /**
+ * [in] Identifier type
+ */
+ enum tf_identifier_type ident_type;
+ /**
+ * [in] Identifier data to search for
+ */
+ uint32_t search_id;
+ /**
+ * [out] Set if matching identifier found
+ */
+ bool hit;
+ /**
+ * [out] Current ref count after allocation
+ */
+ uint32_t ref_cnt;
};
/**
* TruFlow core will allocate a free id from the per identifier resource type
* pool reserved for the session during tf_open(). No firmware is involved.
*
+ * If shadow copy is enabled, the internal ref_cnt is set to 1 in the
+ * shadow table for a newly allocated resource.
+ *
* Returns success or failure code.
*/
int tf_alloc_identifier(struct tf *tfp,
* reserved for the session. No firmware is involved. During tf_close, the
* complete pool is returned to the firmware.
*
+ * additional operation (experimental)
+ * Decrement reference count. Only release resource once refcnt goes to 0 if
+ * shadow copy is enabled.
+ *
* Returns success or failure code.
*/
int tf_free_identifier(struct tf *tfp,
struct tf_free_identifier_parms *parms);
+/**
+ * Search identifier resource (experimental)
+ *
+ * If the shadow copy is enabled search_id is used to search for a matching
+ * entry in the shadow table. The shadow table consists of an array of
+ * reference counts indexed by identifier. If a matching entry is found hit is
+ * set to TRUE, refcnt is increased by 1 and returned. Otherwise, hit is
+ * set to false and refcnt is set to 0.
+ *
+ * TODO: we may need a per table internal shadow copy enable flag to stage
+ * the shadow table implementation. We do not need the shadow table for other
+ * tables at this time so we may only want to enable the identifier shadow.
+ *
+ * TODO: remove this pseudocode below added to show that if search fails
+ * we shouldn't allocate a new entry but return.
+ *
+ * identifier alloc (search_en=1)
+ * if (ident is allocated and ref_cnt >=1)
+ * return ident - hit is set, incr refcnt
+ * else (not found)
+ * return
+ *
+ */
+int tf_search_identifier(struct tf *tfp,
+ struct tf_search_identifier_parms *parms);
+
/**
* @page dram_table DRAM Table Scope Interface
*
*/
uint32_t tbl_scope_id;
};
-
+/**
+ * tf_free_tbl_scope_parms definition
+ */
struct tf_free_tbl_scope_parms {
/**
* [in] table scope identifier
uint32_t tbl_scope_id;
};
+/**
+ * tf_map_tbl_scope_parms definition
+ */
+struct tf_map_tbl_scope_parms {
+ /**
+ * [in] table scope identifier
+ */
+ uint32_t tbl_scope_id;
+ /**
+ * [in] Which parifs are associated with this table scope. Bit 0
+ * indicates parif 0.
+ */
+ uint16_t parif_bitmask;
+};
+
/**
* allocate a table scope
*
* device constraints based upon calculations using either the number of flows
* requested or the size of memory indicated. Other parameters passed in
* determine the configuration (maximum key size, maximum external action record
- * size.
+ * size).
*
- * This API will allocate the table region in
- * DRAM, program the PTU page table entries, and program the number of static
- * buckets (if SR2) in the RX and TX CFAs. Buckets are assumed to start at
- * 0 in the EM memory for the scope. Upon successful completion of this API,
- * hash tables are fully initialized and ready for entries to be inserted.
+ * This API will allocate the table region in DRAM, program the PTU page table
+ * entries, and program the number of static buckets (if SR2) in the RX and TX
+ * CFAs. Buckets are assumed to start at 0 in the EM memory for the scope.
+ * Upon successful completion of this API, hash tables are fully initialized and
+ * ready for entries to be inserted.
*
* A single API is used to allocate a common table scope identifier in both
* receive and transmit CFA. The scope identifier is common due to nature of
int tf_alloc_tbl_scope(struct tf *tfp,
struct tf_alloc_tbl_scope_parms *parms);
+/**
+ * map a table scope (legacy device only Wh+/SR)
+ *
+ * Map a table scope to one or more partition interfaces (parifs).
+ * The parif can be remapped in the L2 context lookup for legacy devices. This
+ * API allows a number of parifs to be mapped to the same table scope. On
+ * legacy devices a table scope identifies one of 16 sets of EEM table base
+ * addresses and is associated with a PF communication channel. The associated
+ * PF must be configured for the table scope to operate.
+ *
+ * An L2 context TCAM lookup returns a remapped parif value used to
+ * index into the set of 16 parif_to_pf registers which are used to map to one
+ * of the 16 table scopes. This API allows the user to map the parifs in the
+ * mask to the previously allocated table scope (EEM table).
+ * Returns success or failure code.
+ */
+int tf_map_tbl_scope(struct tf *tfp,
+ struct tf_map_tbl_scope_parms *parms);
/**
* free a table scope
*
/**
* @page tcam TCAM Access
*
+ * @ref tf_search_tcam_entry
+ *
* @ref tf_alloc_tcam_entry
*
* @ref tf_set_tcam_entry
* @ref tf_free_tcam_entry
*/
+/**
+ * tf_search_tcam_entry parameter definition (experimental)
+ */
+struct tf_search_tcam_entry_parms {
+ /**
+ * [in] receive or transmit direction
+ */
+ enum tf_dir dir;
+ /**
+ * [in] TCAM table type
+ */
+ enum tf_tcam_tbl_type tcam_tbl_type;
+ /**
+ * [in] Key data to match on
+ */
+ uint8_t *key;
+ /**
+ * [in] key size in bits
+ */
+ uint16_t key_sz_in_bits;
+ /**
+ * [in] Mask data to match on
+ */
+ uint8_t *mask;
+ /**
+ * [in] Priority of entry requested (definition TBD)
+ */
+ uint32_t priority;
+ /**
+ * [in] Allocate on miss.
+ */
+ uint8_t alloc;
+ /**
+ * [out] Set if matching entry found
+ */
+ uint8_t hit;
+ /**
+ * [out] Search result status (hit, miss, reject)
+ */
+ enum tf_search_status search_status;
+ /**
+ * [out] Current refcnt after allocation
+ */
+ uint16_t ref_cnt;
+ /**
+ * [in out] The result data from the search is copied here
+ */
+ uint8_t *result;
+ /**
+ * [in out] result size in bits for the result data
+ */
+ uint16_t result_sz_in_bits;
+ /**
+ * [out] Index found
+ */
+ uint16_t idx;
+};
+
+/**
+ * search TCAM entry (experimental)
+ *
+ * Search for a TCAM entry
+ *
+ * This function searches the shadow copy of the TCAM table for a matching
+ * entry. Key and mask must match for hit to be set. Only TruFlow core data
+ * is accessed. If shadow_copy is not enabled, an error is returned.
+ *
+ * Implementation:
+ *
+ * A hash is performed on the key/mask data and mapped to a shadow copy entry
+ * where the full key/mask is populated. If the full key/mask matches the
+ * entry, hit is set, ref_cnt is incremented, and search_status indicates what
+ * action the caller can take regarding setting the entry.
+ *
+ * search_status should be used as follows:
+ * - On Miss, the caller should create a result and call tf_set_tcam_entry with
+ * returned index.
+ *
+ * - On Reject, the hash table is full and the entry cannot be added.
+ *
+ * - On Hit, the result data is returned to the caller. Additionally, the
+ * ref_cnt is updated.
+ *
+ * Also returns success or failure code.
+ */
+int tf_search_tcam_entry(struct tf *tfp,
+ struct tf_search_tcam_entry_parms *parms);
/**
* tf_alloc_tcam_entry parameter definition
* @ref tf_bulk_get_tbl_entry
*/
+/**
+ * tf_alloc_tbl_entry parameter definition
+ */
+struct tf_search_tbl_entry_parms {
+ /**
+ * [in] Receive or transmit direction
+ */
+ enum tf_dir dir;
+ /**
+ * [in] Type of the allocation
+ */
+ enum tf_tbl_type type;
+ /**
+ * [in] Table scope identifier (ignored unless TF_TBL_TYPE_EXT)
+ */
+ uint32_t tbl_scope_id;
+ /**
+ * [in] Result data to search for
+ */
+ uint8_t *result;
+ /**
+ * [in] Result data size in bytes
+ */
+ uint16_t result_sz_in_bytes;
+ /**
+ * [in] Allocate on miss.
+ */
+ uint8_t alloc;
+ /**
+ * [out] Set if matching entry found
+ */
+ uint8_t hit;
+ /**
+ * [out] Search result status (hit, miss, reject)
+ */
+ enum tf_search_status search_status;
+ /**
+ * [out] Current ref count after allocation
+ */
+ uint16_t ref_cnt;
+ /**
+ * [out] Idx of allocated entry or found entry
+ */
+ uint32_t idx;
+};
+
+/**
+ * search Table Entry (experimental)
+ *
+ * This function searches the shadow copy of an index table for a matching
+ * entry. The result data must match for hit to be set. Only TruFlow core
+ * data is accessed. If shadow_copy is not enabled, an error is returned.
+ *
+ * Implementation:
+ *
+ * A hash is performed on the result data and mappe3d to a shadow copy entry
+ * where the result is populated. If the result matches the entry, hit is set,
+ * ref_cnt is incremented (if alloc), and the search status indicates what
+ * action the caller can take regarding setting the entry.
+ *
+ * search status should be used as follows:
+ * - On MISS, the caller should set the result into the returned index.
+ *
+ * - On REJECT, the caller should reject the flow since there are no resources.
+ *
+ * - On Hit, the matching index is returned to the caller. Additionally, the
+ * ref_cnt is updated.
+ *
+ * Also returns success or failure code.
+ */
+int tf_search_tbl_entry(struct tf *tfp,
+ struct tf_search_tbl_entry_parms *parms);
+
/**
* tf_alloc_tbl_entry parameter definition
*/
/**
* Bulk get index table entry
*
- * Used to retrieve a previous set index table entry.
+ * Used to retrieve a set of index table entries.
*
- * Reads and compares with the shadow table copy (if enabled) (only
- * for internal objects).
+ * Entries within the range may not have been allocated using
+ * tf_alloc_tbl_entry() at the time of access. But the range must
+ * be within the bounds determined from tf_open_session() for the
+ * given table type. Currently, this is only used for collecting statistics.
*
* Returns success or failure code. Failure will be returned if the
* provided data buffer is too small for the data type requested.
* get - Read the full configuration
*/
uint8_t *config;
+ /**
+ * [in] Configuration mask
+ * set - Read, Modify with mask and Write
+ * get - unused
+ */
+ uint8_t *config_mask;
/**
* [in] struct containing size
*/
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