238 lines
9.2 KiB
C
238 lines
9.2 KiB
C
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/*
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* @file Header file describing the flow rings DHD interfaces.
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*
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* Flow rings are transmit traffic (=propagating towards antenna) related entities.
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*
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* Provides type definitions and function prototypes used to create, delete and manage flow rings at
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* high level.
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*
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* Portions of this code are copyright (c) 2017 Cypress Semiconductor Corporation
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*
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* Copyright (C) 1999-2017, Broadcom Corporation
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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* Notwithstanding the above, under no circumstances may you combine this
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* software in any way with any other Broadcom software provided under a license
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* other than the GPL, without Broadcom's express prior written consent.
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*
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*
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* <<Broadcom-WL-IPTag/Open:>>
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*
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* $Id: dhd_flowring.h 591285 2015-10-07 11:56:29Z $
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*/
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/****************
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* Common types *
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*/
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#ifndef _dhd_flowrings_h_
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#define _dhd_flowrings_h_
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/* Max pkts held in a flow ring's backup queue */
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#define FLOW_RING_QUEUE_THRESHOLD (2048)
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/* Number of H2D common rings */
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#define FLOW_RING_COMMON BCMPCIE_H2D_COMMON_MSGRINGS
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#define FLOWID_INVALID (ID16_INVALID)
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#define FLOWID_RESERVED (FLOW_RING_COMMON)
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#define FLOW_RING_STATUS_OPEN 0
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#define FLOW_RING_STATUS_PENDING 1
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#define FLOW_RING_STATUS_CLOSED 2
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#define FLOW_RING_STATUS_DELETE_PENDING 3
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#define FLOW_RING_STATUS_FLUSH_PENDING 4
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#define FLOW_RING_STATUS_STA_FREEING 5
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#define DHD_FLOWRING_RX_BUFPOST_PKTSZ 2048
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#define DHD_FLOW_PRIO_AC_MAP 0
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#define DHD_FLOW_PRIO_TID_MAP 1
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#define DHD_FLOW_PRIO_LLR_MAP 2
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/* Pkttag not compatible with PROP_TXSTATUS or WLFC */
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typedef struct dhd_pkttag_fr {
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uint16 flowid;
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uint16 ifid;
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int dataoff;
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dmaaddr_t physaddr;
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uint32 pa_len;
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} dhd_pkttag_fr_t;
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#define DHD_PKTTAG_SET_FLOWID(tag, flow) ((tag)->flowid = (uint16)(flow))
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#define DHD_PKTTAG_SET_IFID(tag, idx) ((tag)->ifid = (uint16)(idx))
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#define DHD_PKTTAG_SET_DATAOFF(tag, offset) ((tag)->dataoff = (int)(offset))
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#define DHD_PKTTAG_SET_PA(tag, pa) ((tag)->physaddr = (pa))
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#define DHD_PKTTAG_SET_PA_LEN(tag, palen) ((tag)->pa_len = (palen))
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#define DHD_PKTTAG_FLOWID(tag) ((tag)->flowid)
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#define DHD_PKTTAG_IFID(tag) ((tag)->ifid)
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#define DHD_PKTTAG_DATAOFF(tag) ((tag)->dataoff)
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#define DHD_PKTTAG_PA(tag) ((tag)->physaddr)
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#define DHD_PKTTAG_PA_LEN(tag) ((tag)->pa_len)
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/* Hashing a MacAddress for lkup into a per interface flow hash table */
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#define DHD_FLOWRING_HASH_SIZE 256
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#define DHD_FLOWRING_HASHINDEX(ea, prio) \
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((((uint8 *)(ea))[3] ^ ((uint8 *)(ea))[4] ^ ((uint8 *)(ea))[5] ^ ((uint8)(prio))) \
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% DHD_FLOWRING_HASH_SIZE)
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#define DHD_IF_ROLE(pub, idx) (((if_flow_lkup_t *)(pub)->if_flow_lkup)[idx].role)
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#define DHD_IF_ROLE_AP(pub, idx) (DHD_IF_ROLE(pub, idx) == WLC_E_IF_ROLE_AP)
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#define DHD_IF_ROLE_STA(pub, idx) (DHD_IF_ROLE(pub, idx) == WLC_E_IF_ROLE_STA)
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#define DHD_IF_ROLE_P2PGO(pub, idx) (DHD_IF_ROLE(pub, idx) == WLC_E_IF_ROLE_P2P_GO)
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#define DHD_FLOW_RING(dhdp, flowid) \
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(flow_ring_node_t *)&(((flow_ring_node_t *)((dhdp)->flow_ring_table))[flowid])
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struct flow_queue;
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/* Flow Ring Queue Enqueue overflow callback */
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typedef int (*flow_queue_cb_t)(struct flow_queue * queue, void * pkt);
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/**
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* Each flow ring has an associated (tx flow controlled) queue. 802.3 packets are transferred
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* between queue and ring. A packet from the host stack is first added to the queue, and in a later
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* stage transferred to the flow ring. Packets in the queue are dhd owned, whereas packets in the
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* flow ring are device owned.
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*/
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typedef struct flow_queue {
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dll_t list; /* manage a flowring queue in a double linked list */
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void * head; /* first packet in the queue */
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void * tail; /* last packet in the queue */
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uint16 len; /* number of packets in the queue */
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uint16 max; /* maximum or min budget (used in cumm) */
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uint32 threshold; /* parent's cummulative length threshold */
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void * clen_ptr; /* parent's cummulative length counter */
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uint32 failures; /* enqueue failures due to queue overflow */
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flow_queue_cb_t cb; /* callback invoked on threshold crossing */
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} flow_queue_t;
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#define DHD_FLOW_QUEUE_LEN(queue) ((int)(queue)->len)
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#define DHD_FLOW_QUEUE_MAX(queue) ((int)(queue)->max)
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#define DHD_FLOW_QUEUE_THRESHOLD(queue) ((int)(queue)->threshold)
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#define DHD_FLOW_QUEUE_EMPTY(queue) ((queue)->len == 0)
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#define DHD_FLOW_QUEUE_FAILURES(queue) ((queue)->failures)
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#define DHD_FLOW_QUEUE_AVAIL(queue) ((int)((queue)->max - (queue)->len))
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#define DHD_FLOW_QUEUE_FULL(queue) ((queue)->len >= (queue)->max)
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#define DHD_FLOW_QUEUE_OVFL(queue, budget) \
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(((queue)->len) > budget)
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#define DHD_FLOW_QUEUE_SET_MAX(queue, budget) \
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((queue)->max) = ((budget) - 1)
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/* Queue's cummulative threshold. */
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#define DHD_FLOW_QUEUE_SET_THRESHOLD(queue, cumm_threshold) \
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((queue)->threshold) = ((cumm_threshold) - 1)
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/* Queue's cummulative length object accessor. */
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#define DHD_FLOW_QUEUE_CLEN_PTR(queue) ((queue)->clen_ptr)
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/* Set a queue's cumm_len point to a parent's cumm_ctr_t cummulative length */
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#define DHD_FLOW_QUEUE_SET_CLEN(queue, parent_clen_ptr) \
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((queue)->clen_ptr) = (void *)(parent_clen_ptr)
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/* see wlfc_proto.h for tx status details */
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#define DHD_FLOWRING_MAXSTATUS_MSGS 5
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#define DHD_FLOWRING_TXSTATUS_CNT_UPDATE(bus, flowid, txstatus)
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/** each flow ring is dedicated to a tid/sa/da combination */
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typedef struct flow_info {
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uint8 tid;
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uint8 ifindex;
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char sa[ETHER_ADDR_LEN];
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char da[ETHER_ADDR_LEN];
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} flow_info_t;
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/** a flow ring is used for outbound (towards antenna) 802.3 packets */
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typedef struct flow_ring_node {
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dll_t list; /* manage a constructed flowring in a dll, must be at first place */
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flow_queue_t queue; /* queues packets before they enter the flow ring, flow control */
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bool active;
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uint8 status;
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/*
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* flowid: unique ID of a flow ring, which can either be unicast or broadcast/multicast. For
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* unicast flow rings, the flow id accelerates ARM 802.3->802.11 header translation.
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*/
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uint16 flowid;
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flow_info_t flow_info;
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void *prot_info;
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void *lock; /* lock for flowring access protection */
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} flow_ring_node_t;
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typedef flow_ring_node_t flow_ring_table_t;
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typedef struct flow_hash_info {
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uint16 flowid;
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flow_info_t flow_info;
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struct flow_hash_info *next;
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} flow_hash_info_t;
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typedef struct if_flow_lkup {
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bool status;
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uint8 role; /* Interface role: STA/AP */
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flow_hash_info_t *fl_hash[DHD_FLOWRING_HASH_SIZE]; /* Lkup Hash table */
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} if_flow_lkup_t;
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static INLINE flow_ring_node_t *
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dhd_constlist_to_flowring(dll_t *item)
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{
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return ((flow_ring_node_t *)item);
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}
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/* Exported API */
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/* Flow ring's queue management functions */
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extern flow_ring_node_t * dhd_flow_ring_node(dhd_pub_t *dhdp, uint16 flowid);
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extern flow_queue_t * dhd_flow_queue(dhd_pub_t *dhdp, uint16 flowid);
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extern void dhd_flow_queue_init(dhd_pub_t *dhdp, flow_queue_t *queue, int max);
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extern void dhd_flow_queue_register(flow_queue_t *queue, flow_queue_cb_t cb);
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extern int dhd_flow_queue_enqueue(dhd_pub_t *dhdp, flow_queue_t *queue, void *pkt);
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extern void * dhd_flow_queue_dequeue(dhd_pub_t *dhdp, flow_queue_t *queue);
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extern void dhd_flow_queue_reinsert(dhd_pub_t *dhdp, flow_queue_t *queue, void *pkt);
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extern void dhd_flow_ring_config_thresholds(dhd_pub_t *dhdp, uint16 flowid,
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int queue_budget, int cumm_threshold, void *cumm_ctr);
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extern int dhd_flow_rings_init(dhd_pub_t *dhdp, uint32 num_flow_rings);
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extern void dhd_flow_rings_deinit(dhd_pub_t *dhdp);
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extern int dhd_flowid_update(dhd_pub_t *dhdp, uint8 ifindex, uint8 prio,
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void *pktbuf);
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extern void dhd_flowid_free(dhd_pub_t *dhdp, uint8 ifindex, uint16 flowid);
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extern void dhd_flow_rings_delete(dhd_pub_t *dhdp, uint8 ifindex);
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extern void dhd_flow_rings_delete_for_peer(dhd_pub_t *dhdp, uint8 ifindex,
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char *addr);
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/* Handle Interface ADD, DEL operations */
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extern void dhd_update_interface_flow_info(dhd_pub_t *dhdp, uint8 ifindex,
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uint8 op, uint8 role);
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/* Handle a STA interface link status update */
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extern int dhd_update_interface_link_status(dhd_pub_t *dhdp, uint8 ifindex,
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uint8 status);
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extern int dhd_flow_prio_map(dhd_pub_t *dhd, uint8 *map, bool set);
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extern int dhd_update_flow_prio_map(dhd_pub_t *dhdp, uint8 map);
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extern uint8 dhd_flow_rings_ifindex2role(dhd_pub_t *dhdp, uint8 ifindex);
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#endif /* _dhd_flowrings_h_ */
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