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dhd_flowring.c
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dhd_flowring.c
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/*
* @file Broadcom Dongle Host Driver (DHD), Flow ring specific code at top level
*
* Flow rings are transmit traffic (=propagating towards antenna) related entities
*
*
* Copyright (C) 2022, Broadcom.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
*
* <<Broadcom-WL-IPTag/Open:>>
*
* $Id$
*/
/** XXX Twiki: [PCIeFullDongleArchitecture] */
#include <typedefs.h>
#include <bcmutils.h>
#include <bcmendian.h>
#include <bcmdevs.h>
#include <ethernet.h>
#include <bcmevent.h>
#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_flowring.h>
#include <dhd_bus.h>
#include <dhd_proto.h>
#include <dhd_dbg.h>
#include <802.1d.h>
#include <pcie_core.h>
#include <bcmmsgbuf.h>
#include <dhd_pcie.h>
static INLINE int dhd_flow_queue_throttle(flow_queue_t *queue);
static INLINE uint16 dhd_flowid_find(dhd_pub_t *dhdp, uint8 ifindex,
uint8 prio, char *sa, char *da);
static INLINE uint16 dhd_flowid_alloc(dhd_pub_t *dhdp, uint8 ifindex,
uint8 prio, char *sa, char *da);
static INLINE int dhd_flowid_lookup(dhd_pub_t *dhdp, uint8 ifindex,
uint8 prio, char *sa, char *da, uint16 *flowid);
int dhd_flow_queue_overflow(flow_queue_t *queue, void *pkt);
#define FLOW_QUEUE_PKT_NEXT(p) PKTLINK(p)
#define FLOW_QUEUE_PKT_SETNEXT(p, x) PKTSETLINK((p), (x))
const uint8 prio2ac[8] = { 0, 1, 1, 0, 2, 2, 3, 3 };
const uint8 prio2tid[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
/** Queue overflow throttle. Return value: TRUE if throttle needs to be applied */
static INLINE int
dhd_flow_queue_throttle(flow_queue_t *queue)
{
#if defined(BCM_ROUTER_DHD)
/* Two tests
* 1) Test whether overall level 2 (grandparent) cummulative threshold crossed.
* 2) Or test whether queue's budget and overall cummulative threshold crossed.
*/
void *gp_clen_ptr = DHD_FLOW_QUEUE_L2CLEN_PTR(queue);
void *parent_clen_ptr = DHD_FLOW_QUEUE_CLEN_PTR(queue);
int gp_cumm_threshold = DHD_FLOW_QUEUE_L2THRESHOLD(queue);
int cumm_threshold = DHD_FLOW_QUEUE_THRESHOLD(queue);
int ret = ((DHD_CUMM_CTR_READ(gp_clen_ptr) > gp_cumm_threshold) ||
((DHD_FLOW_QUEUE_OVFL(queue, DHD_FLOW_QUEUE_MAX(queue))) &&
(DHD_CUMM_CTR_READ(parent_clen_ptr) > cumm_threshold)));
return ret;
#else
return DHD_FLOW_QUEUE_FULL(queue);
#endif /* ! BCM_ROUTER_DHD */
}
int
BCMFASTPATH(dhd_flow_queue_overflow)(flow_queue_t *queue, void *pkt)
{
return BCME_NORESOURCE;
}
/** Returns flow ring given a flowid */
flow_ring_node_t *
dhd_flow_ring_node(dhd_pub_t *dhdp, uint16 flowid)
{
flow_ring_node_t * flow_ring_node;
ASSERT(dhdp != (dhd_pub_t*)NULL);
ASSERT(flowid <= dhdp->max_tx_flowid);
if (flowid > dhdp->max_tx_flowid) {
return NULL;
}
flow_ring_node = &(((flow_ring_node_t*)(dhdp->flow_ring_table))[flowid]);
ASSERT(flow_ring_node->flowid == flowid);
return flow_ring_node;
}
/** Returns 'backup' queue given a flowid */
flow_queue_t *
dhd_flow_queue(dhd_pub_t *dhdp, uint16 flowid)
{
flow_ring_node_t * flow_ring_node = NULL;
flow_ring_node = dhd_flow_ring_node(dhdp, flowid);
if (flow_ring_node)
return &flow_ring_node->queue;
else
return NULL;
}
/* Flow ring's queue management functions */
/** Reinitialize a flow ring's queue. */
void
dhd_flow_queue_reinit(dhd_pub_t *dhdp, flow_queue_t *queue, int max)
{
ASSERT((queue != NULL) && (max > 0));
queue->head = queue->tail = NULL;
queue->len = 0;
/* Set queue's threshold and queue's parent cummulative length counter */
ASSERT(max > 1);
DHD_FLOW_QUEUE_SET_MAX(queue, max);
DHD_FLOW_QUEUE_SET_THRESHOLD(queue, max);
DHD_FLOW_QUEUE_SET_CLEN(queue, &dhdp->cumm_ctr);
DHD_FLOW_QUEUE_SET_L2CLEN(queue, &dhdp->l2cumm_ctr);
queue->failures = 0U;
queue->cb = &dhd_flow_queue_overflow;
}
/** Initialize a flow ring's queue, called on driver initialization. */
void
dhd_flow_queue_init(dhd_pub_t *dhdp, flow_queue_t *queue, int max)
{
ASSERT((queue != NULL) && (max > 0));
dll_init(&queue->list);
dhd_flow_queue_reinit(dhdp, queue, max);
}
/** Register an enqueue overflow callback handler */
void
dhd_flow_queue_register(flow_queue_t *queue, flow_queue_cb_t cb)
{
ASSERT(queue != NULL);
queue->cb = cb;
}
/**
* Enqueue an 802.3 packet at the back of a flow ring's queue. From there, it will travel later on
* to the flow ring itself.
*/
int
BCMFASTPATH(dhd_flow_queue_enqueue)(dhd_pub_t *dhdp, flow_queue_t *queue, void *pkt)
{
int ret = BCME_OK;
ASSERT(queue != NULL);
if (dhd_flow_queue_throttle(queue)) {
queue->failures++;
ret = (*queue->cb)(queue, pkt);
goto done;
}
if (queue->head) {
FLOW_QUEUE_PKT_SETNEXT(queue->tail, pkt);
} else {
queue->head = pkt;
}
FLOW_QUEUE_PKT_SETNEXT(pkt, NULL);
queue->tail = pkt; /* at tail */
queue->len++;
/* increment parent's cummulative length */
DHD_CUMM_CTR_INCR(DHD_FLOW_QUEUE_CLEN_PTR(queue));
/* increment grandparent's cummulative length */
DHD_CUMM_CTR_INCR(DHD_FLOW_QUEUE_L2CLEN_PTR(queue));
done:
return ret;
}
/** Dequeue an 802.3 packet from a flow ring's queue, from head (FIFO) */
void *
BCMFASTPATH(dhd_flow_queue_dequeue)(dhd_pub_t *dhdp, flow_queue_t *queue)
{
void * pkt;
ASSERT(queue != NULL);
pkt = queue->head; /* from head */
if (pkt == NULL) {
goto done;
}
queue->head = FLOW_QUEUE_PKT_NEXT(pkt);
if (queue->head == NULL)
queue->tail = NULL;
queue->len--;
/* decrement parent's cummulative length */
DHD_CUMM_CTR_DECR(DHD_FLOW_QUEUE_CLEN_PTR(queue));
/* decrement grandparent's cummulative length */
DHD_CUMM_CTR_DECR(DHD_FLOW_QUEUE_L2CLEN_PTR(queue));
FLOW_QUEUE_PKT_SETNEXT(pkt, NULL); /* dettach packet from queue */
done:
return pkt;
}
/** Reinsert a dequeued 802.3 packet back at the head */
void
BCMFASTPATH(dhd_flow_queue_reinsert)(dhd_pub_t *dhdp, flow_queue_t *queue, void *pkt)
{
if (queue->head == NULL) {
queue->tail = pkt;
}
FLOW_QUEUE_PKT_SETNEXT(pkt, queue->head);
queue->head = pkt;
queue->len++;
/* increment parent's cummulative length */
DHD_CUMM_CTR_INCR(DHD_FLOW_QUEUE_CLEN_PTR(queue));
/* increment grandparent's cummulative length */
DHD_CUMM_CTR_INCR(DHD_FLOW_QUEUE_L2CLEN_PTR(queue));
}
/** Fetch the backup queue for a flowring, and assign flow control thresholds */
void
dhd_flow_ring_config_thresholds(dhd_pub_t *dhdp, uint16 flowid,
int queue_budget, int cumm_threshold, void *cumm_ctr,
int l2cumm_threshold, void *l2cumm_ctr)
{
flow_queue_t * queue = NULL;
ASSERT(dhdp != (dhd_pub_t*)NULL);
ASSERT(queue_budget > 1);
ASSERT(cumm_threshold > 1);
ASSERT(cumm_ctr != (void*)NULL);
ASSERT(l2cumm_threshold > 1);
ASSERT(l2cumm_ctr != (void*)NULL);
queue = dhd_flow_queue(dhdp, flowid);
if (queue) {
DHD_FLOW_QUEUE_SET_MAX(queue, queue_budget); /* Max queue length */
/* Set the queue's parent threshold and cummulative counter */
DHD_FLOW_QUEUE_SET_THRESHOLD(queue, cumm_threshold);
DHD_FLOW_QUEUE_SET_CLEN(queue, cumm_ctr);
/* Set the queue's grandparent threshold and cummulative counter */
DHD_FLOW_QUEUE_SET_L2THRESHOLD(queue, l2cumm_threshold);
DHD_FLOW_QUEUE_SET_L2CLEN(queue, l2cumm_ctr);
}
}
/*
* This function returns total number of flowrings that can be created for a INFRA STA.
* For prio2ac mapping, it will return 4, prio2ac[8] = { 0, 1, 1, 0, 2, 2, 3, 3 }
* For prio2tid mapping, it will return 8, prio2tid[8] = { 0, 1, 2, 3, 4, 5, 6, 7 }
*/
uint8
dhd_num_prio_supported_per_flow_ring(dhd_pub_t *dhdp)
{
uint8 prio_count = 0;
int i;
/* Pick all elements one by one */
for (i = 0; i < NUMPRIO; i++)
{
/* Check if the picked element is already counted */
int j;
for (j = 0; j < i; j++) {
if (dhdp->flow_prio_map[i] == dhdp->flow_prio_map[j]) {
break;
}
}
/* If not counted earlier, then count it */
if (i == j) {
prio_count++;
}
}
return prio_count;
}
uint8
dhd_get_max_multi_client_flow_rings(dhd_pub_t *dhdp)
{
uint8 reserved_infra_sta_flow_rings = dhd_num_prio_supported_per_flow_ring(dhdp);
uint8 total_tx_flow_rings = (uint8)dhd_get_max_flow_rings(dhdp);
uint8 max_multi_client_flow_rings = total_tx_flow_rings - reserved_infra_sta_flow_rings;
return max_multi_client_flow_rings;
}
int
dhd_flowid_map_init(dhd_pub_t *dhdp, uint16 max_tx_flow_rings)
{
uint16 max_normal_tx_flow_rings = max_tx_flow_rings;
if (dhdp->htput_support) {
max_normal_tx_flow_rings = max_tx_flow_rings - HTPUT_TOTAL_FLOW_RINGS;
}
/* Construct a normal flowid allocator from FLOWID_RESERVED to
* (max_normal_tx_flow_rings - 1)
*/
dhdp->flowid_allocator = id16_map_init(dhdp->osh, max_normal_tx_flow_rings,
FLOWID_RESERVED);
if (dhdp->flowid_allocator == NULL) {
DHD_ERROR(("%s: flowid allocator init failure\n", __FUNCTION__));
return BCME_NOMEM;
}
dhdp->htput_flowid_allocator = NULL;
if (dhdp->htput_support) {
if (HTPUT_TOTAL_FLOW_RINGS > 0) {
dhdp->htput_flow_ring_start = max_normal_tx_flow_rings + FLOWID_RESERVED;
/* Construct a htput flowid allocator from htput_flow_ring_start to
* (htput_flow_ring_start + HTPUT_TOTAL_FLOW_RINGS - 1)
*/
dhdp->htput_flowid_allocator = id16_map_init(dhdp->osh,
HTPUT_TOTAL_FLOW_RINGS, dhdp->htput_flow_ring_start);
if (dhdp->htput_flowid_allocator == NULL) {
DHD_ERROR(("%s: htput flowid allocator init failure\n",
__FUNCTION__));
return BCME_NOMEM;
}
dhdp->htput_client_flow_rings = 0u;
}
}
return BCME_OK;
}
void
dhd_flowid_map_deinit(dhd_pub_t *dhdp)
{
if (dhdp->flowid_allocator) {
dhdp->flowid_allocator = id16_map_fini(dhdp->osh, dhdp->flowid_allocator);
}
ASSERT(dhdp->flowid_allocator == NULL);
if (dhdp->htput_flowid_allocator) {
dhdp->htput_flowid_allocator = id16_map_fini(dhdp->osh,
dhdp->htput_flowid_allocator);
ASSERT(dhdp->htput_flowid_allocator == NULL);
}
dhdp->htput_client_flow_rings = 0u;
return;
}
/** Initializes data structures of multiple flow rings
* num_h2d_rings - max_h2d_rings including static and dynamic rings
*/
int
dhd_flow_rings_init(dhd_pub_t *dhdp, uint32 num_h2d_rings)
{
uint32 idx;
uint32 flow_ring_table_sz = 0;
uint32 if_flow_lkup_sz = 0;
flow_ring_table_t *flow_ring_table = NULL;
if_flow_lkup_t *if_flow_lkup = NULL;
void *lock = NULL;
void *list_lock = NULL;
unsigned long flags;
uint16 max_tx_flow_rings;
DHD_INFO(("%s\n", __FUNCTION__));
/*
* Only 16-bit flowid map will be allocated for actual number of Tx flowrings
* excluding common rings.
* Rest all flowring data structure will be allocated for all num_h2d_rings.
*/
max_tx_flow_rings = dhd_get_max_flow_rings(dhdp);
if (dhd_flowid_map_init(dhdp, max_tx_flow_rings) != BCME_OK) {
DHD_ERROR(("%s: dhd_flowid_map_init failure\n", __FUNCTION__));
goto fail;
}
/* Any Tx flow id should not be > max_tx_flowid */
dhdp->max_tx_flowid = max_tx_flow_rings + FLOWID_RESERVED - 1;
/* Allocate a flow ring table, comprising of requested number of rings */
flow_ring_table_sz = (num_h2d_rings * sizeof(flow_ring_node_t));
flow_ring_table = (flow_ring_table_t *)MALLOCZ(dhdp->osh, flow_ring_table_sz);
if (flow_ring_table == NULL) {
DHD_ERROR(("%s: flow ring table alloc failure\n", __FUNCTION__));
goto fail;
}
/* Initialize flow ring table state */
DHD_CUMM_CTR_INIT(&dhdp->cumm_ctr);
DHD_CUMM_CTR_INIT(&dhdp->l2cumm_ctr);
bzero((uchar *)flow_ring_table, flow_ring_table_sz);
for (idx = 0; idx < num_h2d_rings; idx++) {
flow_ring_table[idx].status = FLOW_RING_STATUS_CLOSED;
flow_ring_table[idx].flowid = (uint16)idx;
flow_ring_table[idx].lock = osl_spin_lock_init(dhdp->osh);
#ifdef IDLE_TX_FLOW_MGMT
flow_ring_table[idx].last_active_ts = OSL_SYSUPTIME();
#endif /* IDLE_TX_FLOW_MGMT */
if (flow_ring_table[idx].lock == NULL) {
DHD_ERROR(("%s: Failed to init spinlock for queue!\n", __FUNCTION__));
goto fail;
}
dll_init(&flow_ring_table[idx].list);
/* Initialize the per flow ring backup queue */
dhd_flow_queue_init(dhdp, &flow_ring_table[idx].queue,
FLOW_RING_QUEUE_THRESHOLD);
}
/* Allocate per interface hash table (for fast lookup from interface to flow ring) */
if_flow_lkup_sz = sizeof(if_flow_lkup_t) * DHD_MAX_IFS;
if_flow_lkup = (if_flow_lkup_t *)DHD_OS_PREALLOC(dhdp,
DHD_PREALLOC_IF_FLOW_LKUP, if_flow_lkup_sz);
if (if_flow_lkup == NULL) {
DHD_ERROR(("%s: if flow lkup alloc failure\n", __FUNCTION__));
goto fail;
}
/* Initialize per interface hash table */
for (idx = 0; idx < DHD_MAX_IFS; idx++) {
int hash_ix;
if_flow_lkup[idx].status = 0;
if_flow_lkup[idx].role = 0;
for (hash_ix = 0; hash_ix < DHD_FLOWRING_HASH_SIZE; hash_ix++)
if_flow_lkup[idx].fl_hash[hash_ix] = NULL;
}
lock = osl_spin_lock_init(dhdp->osh);
if (lock == NULL)
goto fail;
list_lock = osl_spin_lock_init(dhdp->osh);
if (list_lock == NULL)
goto lock_fail;
dhdp->flow_prio_map_type = DHD_FLOW_PRIO_AC_MAP;
bcopy(prio2ac, dhdp->flow_prio_map, sizeof(uint8) * NUMPRIO);
dhdp->max_multi_client_flow_rings = dhd_get_max_multi_client_flow_rings(dhdp);
OSL_ATOMIC_INIT(dhdp->osh, &dhdp->multi_client_flow_rings);
#ifdef DHD_LOSSLESS_ROAMING
dhdp->dequeue_prec_map = ALLPRIO;
#endif
/* Now populate into dhd pub */
DHD_FLOWID_LOCK(lock, flags);
dhdp->num_h2d_rings = num_h2d_rings;
dhdp->flow_ring_table = (void *)flow_ring_table;
dhdp->if_flow_lkup = (void *)if_flow_lkup;
dhdp->flowid_lock = lock;
dhdp->flow_rings_inited = TRUE;
dhdp->flowring_list_lock = list_lock;
DHD_FLOWID_UNLOCK(lock, flags);
DHD_INFO(("%s done\n", __FUNCTION__));
return BCME_OK;
lock_fail:
/* deinit the spinlock */
osl_spin_lock_deinit(dhdp->osh, lock);
fail:
/* Destruct the per interface flow lkup table */
if (if_flow_lkup != NULL) {
DHD_OS_PREFREE(dhdp, if_flow_lkup, if_flow_lkup_sz);
}
if (flow_ring_table != NULL) {
for (idx = 0; idx < num_h2d_rings; idx++) {
if (flow_ring_table[idx].lock != NULL)
osl_spin_lock_deinit(dhdp->osh, flow_ring_table[idx].lock);
}
MFREE(dhdp->osh, flow_ring_table, flow_ring_table_sz);
}
dhd_flowid_map_deinit(dhdp);
return BCME_NOMEM;
}
/** Deinit Flow Ring specific data structures */
void dhd_flow_rings_deinit(dhd_pub_t *dhdp)
{
uint16 idx;
uint32 flow_ring_table_sz;
uint32 if_flow_lkup_sz;
flow_ring_table_t *flow_ring_table;
unsigned long flags;
void *lock;
DHD_INFO(("dhd_flow_rings_deinit\n"));
if (!(dhdp->flow_rings_inited)) {
DHD_ERROR(("dhd_flow_rings not initialized!\n"));
return;
}
if (dhdp->flow_ring_table != NULL) {
ASSERT(dhdp->num_h2d_rings > 0);
DHD_FLOWID_LOCK(dhdp->flowid_lock, flags);
flow_ring_table = (flow_ring_table_t *)dhdp->flow_ring_table;
dhdp->flow_ring_table = NULL;
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
for (idx = 0; idx < dhdp->num_h2d_rings; idx++) {
if (flow_ring_table[idx].active) {
dhd_bus_clean_flow_ring(dhdp->bus, &flow_ring_table[idx]);
}
ASSERT(DHD_FLOW_QUEUE_EMPTY(&flow_ring_table[idx].queue));
/* Deinit flow ring queue locks before destroying flow ring table */
if (flow_ring_table[idx].lock != NULL) {
osl_spin_lock_deinit(dhdp->osh, flow_ring_table[idx].lock);
}
flow_ring_table[idx].lock = NULL;
}
/* Destruct the flow ring table */
flow_ring_table_sz = dhdp->num_h2d_rings * sizeof(flow_ring_table_t);
MFREE(dhdp->osh, flow_ring_table, flow_ring_table_sz);
}
DHD_FLOWID_LOCK(dhdp->flowid_lock, flags);
/* Destruct the per interface flow lkup table */
if (dhdp->if_flow_lkup != NULL) {
if_flow_lkup_sz = sizeof(if_flow_lkup_t) * DHD_MAX_IFS;
bzero((uchar *)dhdp->if_flow_lkup, if_flow_lkup_sz);
DHD_OS_PREFREE(dhdp, dhdp->if_flow_lkup, if_flow_lkup_sz);
dhdp->if_flow_lkup = NULL;
}
/* Destruct the flowid allocator */
dhd_flowid_map_deinit(dhdp);
dhdp->num_h2d_rings = 0U;
bzero(dhdp->flow_prio_map, sizeof(uint8) * NUMPRIO);
dhdp->max_multi_client_flow_rings = 0U;
OSL_ATOMIC_INIT(dhdp->osh, &dhdp->multi_client_flow_rings);
lock = dhdp->flowid_lock;
dhdp->flowid_lock = NULL;
if (lock) {
DHD_FLOWID_UNLOCK(lock, flags);
osl_spin_lock_deinit(dhdp->osh, lock);
}
osl_spin_lock_deinit(dhdp->osh, dhdp->flowring_list_lock);
dhdp->flowring_list_lock = NULL;
ASSERT(dhdp->if_flow_lkup == NULL);
ASSERT(dhdp->flow_ring_table == NULL);
dhdp->flow_rings_inited = FALSE;
}
/** Uses hash table to quickly map from ifindex to a flow ring 'role' (STA/AP) */
uint8
dhd_flow_rings_ifindex2role(dhd_pub_t *dhdp, uint8 ifindex)
{
if_flow_lkup_t *if_flow_lkup = (if_flow_lkup_t *)dhdp->if_flow_lkup;
ASSERT(if_flow_lkup);
return if_flow_lkup[ifindex].role;
}
#ifdef WLTDLS
bool is_tdls_destination(dhd_pub_t *dhdp, uint8 *da)
{
unsigned long flags;
tdls_peer_node_t *cur = NULL;
DHD_TDLS_LOCK(&dhdp->tdls_lock, flags);
/* Check only if tdls peer is added */
if (dhdp->peer_tbl.tdls_peer_count && !(ETHER_ISMULTI(da))) {
cur = dhdp->peer_tbl.node;
while (cur != NULL) {
if (!memcmp(da, cur->addr, ETHER_ADDR_LEN)) {
DHD_TDLS_UNLOCK(&dhdp->tdls_lock, flags);
return TRUE;
}
cur = cur->next;
}
}
DHD_TDLS_UNLOCK(&dhdp->tdls_lock, flags);
return FALSE;
}
#endif /* WLTDLS */
/** Uses hash table to quickly map from ifindex+prio+da to a flow ring id */
static INLINE uint16
dhd_flowid_find(dhd_pub_t *dhdp, uint8 ifindex, uint8 prio, char *sa, char *da)
{
int hash;
bool ismcast = FALSE;
flow_hash_info_t *cur;
if_flow_lkup_t *if_flow_lkup;
unsigned long flags;
ASSERT(ifindex < DHD_MAX_IFS);
if (ifindex >= DHD_MAX_IFS)
return FLOWID_INVALID;
DHD_FLOWID_LOCK(dhdp->flowid_lock, flags);
if_flow_lkup = (if_flow_lkup_t *)dhdp->if_flow_lkup;
ASSERT(if_flow_lkup);
if (DHD_IF_ROLE_GENERIC_STA(dhdp, ifindex)) {
#ifdef WLTDLS
if (is_tdls_destination(dhdp, da)) {
hash = DHD_FLOWRING_HASHINDEX(da, prio);
cur = if_flow_lkup[ifindex].fl_hash[hash];
while (cur != NULL) {
if (!memcmp(cur->flow_info.da, da, ETHER_ADDR_LEN)) {
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
return cur->flowid;
}
cur = cur->next;
}
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
return FLOWID_INVALID;
}
#endif /* WLTDLS */
/* For STA non TDLS dest and WDS dest flow ring id is mapped based on prio only */
cur = if_flow_lkup[ifindex].fl_hash[prio];
if (cur) {
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
return cur->flowid;
}
} else {
if (ETHER_ISMULTI(da) &&
TRUE) {
ismcast = TRUE;
hash = 0;
} else {
hash = DHD_FLOWRING_HASHINDEX(da, prio);
}
cur = if_flow_lkup[ifindex].fl_hash[hash];
while (cur) {
if ((ismcast && ETHER_ISMULTI(cur->flow_info.da)) ||
(!memcmp(cur->flow_info.da, da, ETHER_ADDR_LEN) &&
(cur->flow_info.tid == prio))) {
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
return cur->flowid;
}
cur = cur->next;
}
}
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
#ifdef DHD_EFI
DHD_TRACE(("%s: cannot find flowid\n", __FUNCTION__));
#else
DHD_INFO(("%s: cannot find flowid\n", __FUNCTION__));
#endif
return FLOWID_INVALID;
} /* dhd_flowid_find */
static uint16
dhd_flowid_map_alloc(dhd_pub_t *dhdp, uint8 ifindex, uint8 prio, char *da)
{
uint16 flowid = FLOWID_INVALID;
ASSERT(dhdp->flowid_allocator != NULL);
/* P2P Connections are always 80Mhz */
if (DHD_IF_ROLE_P2PGC(dhdp, ifindex) ||
DHD_IF_ROLE_P2PGO(dhdp, ifindex)) {
flowid = id16_map_alloc(dhdp->flowid_allocator);
return flowid;
}
if (dhdp->htput_flowid_allocator) {
if (prio == HTPUT_FLOW_RING_PRIO) {
if (DHD_IF_ROLE_GENERIC_STA(dhdp, ifindex)) {
/* For STA case, only one flowring per PRIO is created,
* so no need to have a HTPUT counter variable for STA case.
* If already HTPUT flowring is allocated for given HTPUT_PRIO,
* then this function will not even get called as dhd_flowid_find
* will take care assigning same for those HTPUT_PRIO packets.
*/
flowid = id16_map_alloc(dhdp->htput_flowid_allocator);
} else if (DHD_IF_ROLE_MULTI_CLIENT(dhdp, ifindex) && !ETHER_ISMULTI(da) &&
dhd_is_sta_htput(dhdp, ifindex, (uint8 *)da)) {
/* Use HTPUT flowrings for only HTPUT_NUM_CLIENT_FLOW_RINGS */
if (dhdp->htput_client_flow_rings < HTPUT_NUM_CLIENT_FLOW_RINGS) {
flowid = id16_map_alloc(dhdp->htput_flowid_allocator);
/* increment htput client counter */
if (flowid != FLOWID_INVALID) {
dhdp->htput_client_flow_rings++;
}
}
}
}
}
BCM_REFERENCE(flowid);
/*
* For HTPUT case, if the high throughput flowrings are already allocated
* for the given role, the control comes here.
*/
if (flowid == FLOWID_INVALID) {
flowid = id16_map_alloc(dhdp->flowid_allocator);
}
return flowid;
}
/** Create unique Flow ID, called when a flow ring is created. */
static INLINE uint16
dhd_flowid_alloc(dhd_pub_t *dhdp, uint8 ifindex, uint8 prio, char *sa, char *da)
{
flow_hash_info_t *fl_hash_node, *cur;
if_flow_lkup_t *if_flow_lkup;
int hash;
uint16 flowid;
unsigned long flags;
fl_hash_node = (flow_hash_info_t *) MALLOCZ(dhdp->osh, sizeof(flow_hash_info_t));
if (fl_hash_node == NULL) {
DHD_ERROR(("%s: flow_hash_info_t memory allocation failed \n", __FUNCTION__));
return FLOWID_INVALID;
}
memcpy(fl_hash_node->flow_info.da, da, sizeof(fl_hash_node->flow_info.da));
DHD_FLOWID_LOCK(dhdp->flowid_lock, flags);
flowid = dhd_flowid_map_alloc(dhdp, ifindex, prio, da);
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
if (flowid == FLOWID_INVALID) {
MFREE(dhdp->osh, fl_hash_node, sizeof(flow_hash_info_t));
DHD_ERROR_RLMT(("%s: cannot get free flowid \n", __FUNCTION__));
return FLOWID_INVALID;
}
fl_hash_node->flowid = flowid;
fl_hash_node->flow_info.tid = prio;
fl_hash_node->flow_info.ifindex = ifindex;
fl_hash_node->next = NULL;
DHD_FLOWID_LOCK(dhdp->flowid_lock, flags);
if_flow_lkup = (if_flow_lkup_t *)dhdp->if_flow_lkup;
if (DHD_IF_ROLE_GENERIC_STA(dhdp, ifindex)) {
/* For STA/GC non TDLS dest and WDS dest we allocate entry based on prio only */
#ifdef WLTDLS
if (is_tdls_destination(dhdp, da)) {
hash = DHD_FLOWRING_HASHINDEX(da, prio);
cur = if_flow_lkup[ifindex].fl_hash[hash];
if (cur) {
while (cur->next) {
cur = cur->next;
}
cur->next = fl_hash_node;
} else {
if_flow_lkup[ifindex].fl_hash[hash] = fl_hash_node;
}
} else
#endif /* WLTDLS */
if_flow_lkup[ifindex].fl_hash[prio] = fl_hash_node;
} else {
/* For bcast/mcast assign first slot in in interface */
hash = (ETHER_ISMULTI(da) &&
TRUE) ? 0 : DHD_FLOWRING_HASHINDEX(da, prio);
cur = if_flow_lkup[ifindex].fl_hash[hash];
if (cur) {
while (cur->next) {
cur = cur->next;
}
cur->next = fl_hash_node;
} else
if_flow_lkup[ifindex].fl_hash[hash] = fl_hash_node;
}
DHD_FLOWID_UNLOCK(dhdp->flowid_lock, flags);
DHD_INFO(("%s: allocated flowid %d\n", __FUNCTION__, fl_hash_node->flowid));
if (fl_hash_node->flowid > dhdp->max_tx_flowid) {
DHD_ERROR(("%s: flowid=%d max_tx_flowid=%d ifindex=%d prio=%d role=%d\n",
__FUNCTION__, fl_hash_node->flowid, dhdp->max_tx_flowid,
ifindex, prio, if_flow_lkup[ifindex].role));
dhd_prhex("da", (uchar *)da, ETHER_ADDR_LEN, DHD_ERROR_VAL);
dhd_prhex("sa", (uchar *)sa, ETHER_ADDR_LEN, DHD_ERROR_VAL);
return FLOWID_INVALID;
}
return fl_hash_node->flowid;
} /* dhd_flowid_alloc */
/** Get flow ring ID, if not present try to create one */
static INLINE int
dhd_flowid_lookup(dhd_pub_t *dhdp, uint8 ifindex,
uint8 prio, char *sa, char *da, uint16 *flowid)
{
uint16 id;
flow_ring_node_t *flow_ring_node;
flow_ring_table_t *flow_ring_table;
unsigned long flags;
int ret;
DHD_TRACE(("%s\n", __FUNCTION__));
if (!dhdp->flow_ring_table) {
return BCME_ERROR;
}
ASSERT(ifindex < DHD_MAX_IFS);
if (ifindex >= DHD_MAX_IFS)
return BCME_BADARG;
flow_ring_table = (flow_ring_table_t *)dhdp->flow_ring_table;
id = dhd_flowid_find(dhdp, ifindex, prio, sa, da);
if (id == FLOWID_INVALID || (id > dhdp->max_tx_flowid)) {
bool if_role_multi_client;
if_flow_lkup_t *if_flow_lkup;
if_flow_lkup = (if_flow_lkup_t *)dhdp->if_flow_lkup;
if (!if_flow_lkup[ifindex].status)
return BCME_ERROR;
/* check role for multi client case */
if_role_multi_client = DHD_IF_ROLE_MULTI_CLIENT(dhdp, ifindex);
/* Abort Flowring creation if multi client flowrings crossed the threshold */
#ifdef DHD_LIMIT_MULTI_CLIENT_FLOWRINGS
if (if_role_multi_client &&
(OSL_ATOMIC_READ(dhdp->osh, &dhdp->multi_client_flow_rings) >=
dhdp->max_multi_client_flow_rings)) {
DHD_ERROR_RLMT(("%s: Max multi client flow rings reached: %d:%d\n",
__FUNCTION__,
OSL_ATOMIC_READ(dhdp->osh, &dhdp->multi_client_flow_rings),
dhdp->max_multi_client_flow_rings));
return BCME_ERROR;
}
#endif /* DHD_LIMIT_MULTI_CLIENT_FLOWRINGS */
/* Do not create Flowring if peer is not associated */
#if (defined(linux) || defined(LINUX)) && defined(PCIE_FULL_DONGLE)
if (if_role_multi_client && !ETHER_ISMULTI(da) &&
!dhd_sta_associated(dhdp, ifindex, (uint8 *)da)) {
DHD_ERROR_RLMT(("%s: Skip send pkt without peer addition\n", __FUNCTION__));
return BCME_ERROR;
}
#endif /* (linux || LINUX) && PCIE_FULL_DONGLE */
id = dhd_flowid_alloc(dhdp, ifindex, prio, sa, da);
if (id == FLOWID_INVALID) {
DHD_ERROR_RLMT(("%s: alloc flowid ifindex %u status %u\n",
__FUNCTION__, ifindex, if_flow_lkup[ifindex].status));
return BCME_ERROR;
}
ASSERT(id <= dhdp->max_tx_flowid);
/* Only after flowid alloc, increment multi_client_flow_rings */
if (if_role_multi_client) {
OSL_ATOMIC_INC(dhdp->osh, &dhdp->multi_client_flow_rings);
}
/* register this flowid in dhd_pub */
dhd_add_flowid(dhdp, ifindex, prio, da, id);
flow_ring_node = (flow_ring_node_t *) &flow_ring_table[id];
DHD_FLOWRING_LOCK(flow_ring_node->lock, flags);
/* Init Flow info */
memcpy(flow_ring_node->flow_info.sa, sa, sizeof(flow_ring_node->flow_info.sa));
memcpy(flow_ring_node->flow_info.da, da, sizeof(flow_ring_node->flow_info.da));
flow_ring_node->flow_info.tid = prio;
flow_ring_node->flow_info.ifindex = ifindex;
flow_ring_node->active = TRUE;
flow_ring_node->status = FLOW_RING_STATUS_CREATE_PENDING;
#ifdef DEVICE_TX_STUCK_DETECT
flow_ring_node->tx_cmpl = flow_ring_node->tx_cmpl_prev = OSL_SYSUPTIME();
flow_ring_node->stuck_count = 0;
#endif /* DEVICE_TX_STUCK_DETECT */
#ifdef TX_STATUS_LATENCY_STATS
flow_ring_node->flow_info.num_tx_status = 0;
flow_ring_node->flow_info.cum_tx_status_latency = 0;
flow_ring_node->flow_info.num_tx_pkts = 0;
#endif /* TX_STATUS_LATENCY_STATS */
#ifdef BCMDBG
bzero(&flow_ring_node->flow_info.tx_status[0],
sizeof(uint32) * DHD_MAX_TX_STATUS_MSGS);
#endif
DHD_FLOWRING_UNLOCK(flow_ring_node->lock, flags);
/* Create and inform device about the new flow */
if (dhd_bus_flow_ring_create_request(dhdp->bus, (void *)flow_ring_node)
!= BCME_OK) {
DHD_FLOWRING_LOCK(flow_ring_node->lock, flags);
flow_ring_node->status = FLOW_RING_STATUS_CLOSED;
flow_ring_node->active = FALSE;
DHD_FLOWRING_UNLOCK(flow_ring_node->lock, flags);
DHD_ERROR(("%s: create error %d\n", __FUNCTION__, id));
return BCME_ERROR;
}
*flowid = id;
return BCME_OK;
} else {
/* if the Flow id was found in the hash */
if (id > dhdp->max_tx_flowid) {
DHD_ERROR(("%s: Invalid flow id : %u, max_tx_flowid : %u\n",
__FUNCTION__, id, dhdp->max_tx_flowid));
*flowid = FLOWID_INVALID;
ASSERT(0);
return BCME_ERROR;
}
flow_ring_node = (flow_ring_node_t *) &flow_ring_table[id];
DHD_FLOWRING_LOCK(flow_ring_node->lock, flags);
/*
* If the flow_ring_node is in Open State or Status pending state then
* we can return the Flow id to the caller.If the flow_ring_node is in
* FLOW_RING_STATUS_PENDING this means the creation is in progress and
* hence the packets should be queued.
*
* If the flow_ring_node is in FLOW_RING_STATUS_DELETE_PENDING Or
* FLOW_RING_STATUS_CLOSED, then we should return Error.
* Note that if the flowing is being deleted we would mark it as
* FLOW_RING_STATUS_DELETE_PENDING. Now before Dongle could respond and
* before we mark it as FLOW_RING_STATUS_CLOSED we could get tx packets.
* We should drop the packets in that case.
* The decission to return OK should NOT be based on 'active' variable, beause
* active is made TRUE when a flow_ring_node gets allocated and is made
* FALSE when the flow ring gets removed and does not reflect the True state
* of the Flow ring.
* In case if IDLE_TX_FLOW_MGMT is defined, we have to handle two more flowring
* states. If the flow_ring_node's status is FLOW_RING_STATUS_SUSPENDED, the flowid
* is to be returned and from dhd_bus_txdata, the flowring would be resumed again.
* The status FLOW_RING_STATUS_RESUME_PENDING, is equivalent to
* FLOW_RING_STATUS_CREATE_PENDING.
*/
if (flow_ring_node->status == FLOW_RING_STATUS_DELETE_PENDING ||
flow_ring_node->status == FLOW_RING_STATUS_CLOSED) {
*flowid = FLOWID_INVALID;
ret = BCME_ERROR;
} else {
*flowid = id;
ret = BCME_OK;
}
DHD_FLOWRING_UNLOCK(flow_ring_node->lock, flags);
return ret;
} /* Flow Id found in the hash */
} /* dhd_flowid_lookup */
int
dhd_flowid_find_by_ifidx(dhd_pub_t *dhdp, uint8 ifindex, uint16 flowid)
{
int hashidx = 0;
bool found = FALSE;