509 lines
11 KiB
C
509 lines
11 KiB
C
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// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2014 Broadcom Corporation
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*/
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <brcmu_utils.h>
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#include "core.h"
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#include "debug.h"
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#include "bus.h"
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#include "proto.h"
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#include "flowring.h"
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#include "msgbuf.h"
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#include "common.h"
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#define BRCMF_FLOWRING_HIGH 1024
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#define BRCMF_FLOWRING_LOW (BRCMF_FLOWRING_HIGH - 256)
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#define BRCMF_FLOWRING_INVALID_IFIDX 0xff
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#define BRCMF_FLOWRING_HASH_AP(da, fifo, ifidx) (da[5] * 2 + fifo + ifidx * 16)
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#define BRCMF_FLOWRING_HASH_STA(fifo, ifidx) (fifo + ifidx * 16)
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static const u8 brcmf_flowring_prio2fifo[] = {
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0,
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1,
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1,
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0,
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2,
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2,
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3,
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3
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};
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static const u8 ALLFFMAC[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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static bool
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brcmf_flowring_is_tdls_mac(struct brcmf_flowring *flow, u8 mac[ETH_ALEN])
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{
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struct brcmf_flowring_tdls_entry *search;
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search = flow->tdls_entry;
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while (search) {
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if (memcmp(search->mac, mac, ETH_ALEN) == 0)
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return true;
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search = search->next;
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}
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return false;
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}
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u32 brcmf_flowring_lookup(struct brcmf_flowring *flow, u8 da[ETH_ALEN],
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u8 prio, u8 ifidx)
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{
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struct brcmf_flowring_hash *hash;
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u16 hash_idx;
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u32 i;
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bool found;
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bool sta;
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u8 fifo;
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u8 *mac;
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fifo = brcmf_flowring_prio2fifo[prio];
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sta = (flow->addr_mode[ifidx] == ADDR_INDIRECT);
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mac = da;
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if ((!sta) && (is_multicast_ether_addr(da))) {
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mac = (u8 *)ALLFFMAC;
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fifo = 0;
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}
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if ((sta) && (flow->tdls_active) &&
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(brcmf_flowring_is_tdls_mac(flow, da))) {
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sta = false;
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}
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hash_idx = sta ? BRCMF_FLOWRING_HASH_STA(fifo, ifidx) :
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BRCMF_FLOWRING_HASH_AP(mac, fifo, ifidx);
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hash_idx &= (BRCMF_FLOWRING_HASHSIZE - 1);
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found = false;
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hash = flow->hash;
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for (i = 0; i < BRCMF_FLOWRING_HASHSIZE; i++) {
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if ((sta || (memcmp(hash[hash_idx].mac, mac, ETH_ALEN) == 0)) &&
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(hash[hash_idx].fifo == fifo) &&
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(hash[hash_idx].ifidx == ifidx)) {
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found = true;
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break;
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}
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hash_idx++;
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hash_idx &= (BRCMF_FLOWRING_HASHSIZE - 1);
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}
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if (found)
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return hash[hash_idx].flowid;
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return BRCMF_FLOWRING_INVALID_ID;
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}
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u32 brcmf_flowring_create(struct brcmf_flowring *flow, u8 da[ETH_ALEN],
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u8 prio, u8 ifidx)
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{
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struct brcmf_flowring_ring *ring;
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struct brcmf_flowring_hash *hash;
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u16 hash_idx;
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u32 i;
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bool found;
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u8 fifo;
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bool sta;
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u8 *mac;
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fifo = brcmf_flowring_prio2fifo[prio];
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sta = (flow->addr_mode[ifidx] == ADDR_INDIRECT);
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mac = da;
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if ((!sta) && (is_multicast_ether_addr(da))) {
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mac = (u8 *)ALLFFMAC;
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fifo = 0;
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}
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if ((sta) && (flow->tdls_active) &&
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(brcmf_flowring_is_tdls_mac(flow, da))) {
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sta = false;
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}
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hash_idx = sta ? BRCMF_FLOWRING_HASH_STA(fifo, ifidx) :
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BRCMF_FLOWRING_HASH_AP(mac, fifo, ifidx);
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hash_idx &= (BRCMF_FLOWRING_HASHSIZE - 1);
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found = false;
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hash = flow->hash;
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for (i = 0; i < BRCMF_FLOWRING_HASHSIZE; i++) {
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if ((hash[hash_idx].ifidx == BRCMF_FLOWRING_INVALID_IFIDX) &&
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(is_zero_ether_addr(hash[hash_idx].mac))) {
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found = true;
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break;
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}
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hash_idx++;
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hash_idx &= (BRCMF_FLOWRING_HASHSIZE - 1);
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}
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if (found) {
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for (i = 0; i < flow->nrofrings; i++) {
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if (flow->rings[i] == NULL)
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break;
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}
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if (i == flow->nrofrings)
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return -ENOMEM;
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ring = kzalloc(sizeof(*ring), GFP_ATOMIC);
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if (!ring)
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return -ENOMEM;
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memcpy(hash[hash_idx].mac, mac, ETH_ALEN);
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hash[hash_idx].fifo = fifo;
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hash[hash_idx].ifidx = ifidx;
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hash[hash_idx].flowid = i;
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ring->hash_id = hash_idx;
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ring->status = RING_CLOSED;
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skb_queue_head_init(&ring->skblist);
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flow->rings[i] = ring;
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return i;
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}
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return BRCMF_FLOWRING_INVALID_ID;
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}
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u8 brcmf_flowring_tid(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_flowring_ring *ring;
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ring = flow->rings[flowid];
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return flow->hash[ring->hash_id].fifo;
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}
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static void brcmf_flowring_block(struct brcmf_flowring *flow, u16 flowid,
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bool blocked)
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{
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struct brcmf_flowring_ring *ring;
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struct brcmf_bus *bus_if;
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struct brcmf_pub *drvr;
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struct brcmf_if *ifp;
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bool currently_blocked;
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int i;
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u8 ifidx;
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unsigned long flags;
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spin_lock_irqsave(&flow->block_lock, flags);
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ring = flow->rings[flowid];
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if (ring->blocked == blocked) {
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spin_unlock_irqrestore(&flow->block_lock, flags);
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return;
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}
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ifidx = brcmf_flowring_ifidx_get(flow, flowid);
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currently_blocked = false;
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for (i = 0; i < flow->nrofrings; i++) {
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if ((flow->rings[i]) && (i != flowid)) {
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ring = flow->rings[i];
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if ((ring->status == RING_OPEN) &&
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(brcmf_flowring_ifidx_get(flow, i) == ifidx)) {
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if (ring->blocked) {
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currently_blocked = true;
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break;
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}
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}
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}
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}
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flow->rings[flowid]->blocked = blocked;
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if (currently_blocked) {
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spin_unlock_irqrestore(&flow->block_lock, flags);
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return;
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}
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bus_if = dev_get_drvdata(flow->dev);
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drvr = bus_if->drvr;
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ifp = brcmf_get_ifp(drvr, ifidx);
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brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW, blocked);
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spin_unlock_irqrestore(&flow->block_lock, flags);
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}
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void brcmf_flowring_delete(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_bus *bus_if = dev_get_drvdata(flow->dev);
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struct brcmf_flowring_ring *ring;
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struct brcmf_if *ifp;
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u16 hash_idx;
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u8 ifidx;
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struct sk_buff *skb;
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ring = flow->rings[flowid];
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if (!ring)
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return;
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ifidx = brcmf_flowring_ifidx_get(flow, flowid);
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ifp = brcmf_get_ifp(bus_if->drvr, ifidx);
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brcmf_flowring_block(flow, flowid, false);
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hash_idx = ring->hash_id;
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flow->hash[hash_idx].ifidx = BRCMF_FLOWRING_INVALID_IFIDX;
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eth_zero_addr(flow->hash[hash_idx].mac);
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flow->rings[flowid] = NULL;
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skb = skb_dequeue(&ring->skblist);
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while (skb) {
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brcmf_txfinalize(ifp, skb, false);
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skb = skb_dequeue(&ring->skblist);
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}
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kfree(ring);
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}
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u32 brcmf_flowring_enqueue(struct brcmf_flowring *flow, u16 flowid,
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struct sk_buff *skb)
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{
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struct brcmf_flowring_ring *ring;
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ring = flow->rings[flowid];
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skb_queue_tail(&ring->skblist, skb);
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if (!ring->blocked &&
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(skb_queue_len(&ring->skblist) > BRCMF_FLOWRING_HIGH)) {
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brcmf_flowring_block(flow, flowid, true);
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brcmf_dbg(MSGBUF, "Flowcontrol: BLOCK for ring %d\n", flowid);
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/* To prevent (work around) possible race condition, check
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* queue len again. It is also possible to use locking to
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* protect, but that is undesirable for every enqueue and
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* dequeue. This simple check will solve a possible race
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* condition if it occurs.
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*/
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if (skb_queue_len(&ring->skblist) < BRCMF_FLOWRING_LOW)
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brcmf_flowring_block(flow, flowid, false);
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}
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return skb_queue_len(&ring->skblist);
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}
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struct sk_buff *brcmf_flowring_dequeue(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_flowring_ring *ring;
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struct sk_buff *skb;
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ring = flow->rings[flowid];
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if (ring->status != RING_OPEN)
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return NULL;
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skb = skb_dequeue(&ring->skblist);
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if (ring->blocked &&
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(skb_queue_len(&ring->skblist) < BRCMF_FLOWRING_LOW)) {
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brcmf_flowring_block(flow, flowid, false);
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brcmf_dbg(MSGBUF, "Flowcontrol: OPEN for ring %d\n", flowid);
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}
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return skb;
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}
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void brcmf_flowring_reinsert(struct brcmf_flowring *flow, u16 flowid,
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struct sk_buff *skb)
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{
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struct brcmf_flowring_ring *ring;
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ring = flow->rings[flowid];
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skb_queue_head(&ring->skblist, skb);
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}
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u32 brcmf_flowring_qlen(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_flowring_ring *ring;
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ring = flow->rings[flowid];
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if (!ring)
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return 0;
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if (ring->status != RING_OPEN)
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return 0;
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return skb_queue_len(&ring->skblist);
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}
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void brcmf_flowring_open(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_flowring_ring *ring;
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ring = flow->rings[flowid];
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if (!ring) {
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brcmf_err("Ring NULL, for flowid %d\n", flowid);
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return;
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}
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ring->status = RING_OPEN;
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}
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u8 brcmf_flowring_ifidx_get(struct brcmf_flowring *flow, u16 flowid)
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{
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struct brcmf_flowring_ring *ring;
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u16 hash_idx;
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ring = flow->rings[flowid];
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hash_idx = ring->hash_id;
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return flow->hash[hash_idx].ifidx;
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}
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struct brcmf_flowring *brcmf_flowring_attach(struct device *dev, u16 nrofrings)
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{
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struct brcmf_flowring *flow;
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u32 i;
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flow = kzalloc(sizeof(*flow), GFP_KERNEL);
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if (flow) {
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flow->dev = dev;
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flow->nrofrings = nrofrings;
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spin_lock_init(&flow->block_lock);
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for (i = 0; i < ARRAY_SIZE(flow->addr_mode); i++)
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flow->addr_mode[i] = ADDR_INDIRECT;
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for (i = 0; i < ARRAY_SIZE(flow->hash); i++)
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flow->hash[i].ifidx = BRCMF_FLOWRING_INVALID_IFIDX;
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flow->rings = kcalloc(nrofrings, sizeof(*flow->rings),
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GFP_KERNEL);
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||
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|
if (!flow->rings) {
|
||
|
|
kfree(flow);
|
||
|
|
flow = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return flow;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void brcmf_flowring_detach(struct brcmf_flowring *flow)
|
||
|
|
{
|
||
|
|
struct brcmf_bus *bus_if = dev_get_drvdata(flow->dev);
|
||
|
|
struct brcmf_pub *drvr = bus_if->drvr;
|
||
|
|
struct brcmf_flowring_tdls_entry *search;
|
||
|
|
struct brcmf_flowring_tdls_entry *remove;
|
||
|
|
u16 flowid;
|
||
|
|
|
||
|
|
for (flowid = 0; flowid < flow->nrofrings; flowid++) {
|
||
|
|
if (flow->rings[flowid])
|
||
|
|
brcmf_msgbuf_delete_flowring(drvr, flowid);
|
||
|
|
}
|
||
|
|
|
||
|
|
search = flow->tdls_entry;
|
||
|
|
while (search) {
|
||
|
|
remove = search;
|
||
|
|
search = search->next;
|
||
|
|
kfree(remove);
|
||
|
|
}
|
||
|
|
kfree(flow->rings);
|
||
|
|
kfree(flow);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void brcmf_flowring_configure_addr_mode(struct brcmf_flowring *flow, int ifidx,
|
||
|
|
enum proto_addr_mode addr_mode)
|
||
|
|
{
|
||
|
|
struct brcmf_bus *bus_if = dev_get_drvdata(flow->dev);
|
||
|
|
struct brcmf_pub *drvr = bus_if->drvr;
|
||
|
|
u32 i;
|
||
|
|
u16 flowid;
|
||
|
|
|
||
|
|
if (flow->addr_mode[ifidx] != addr_mode) {
|
||
|
|
for (i = 0; i < ARRAY_SIZE(flow->hash); i++) {
|
||
|
|
if (flow->hash[i].ifidx == ifidx) {
|
||
|
|
flowid = flow->hash[i].flowid;
|
||
|
|
if (flow->rings[flowid]->status != RING_OPEN)
|
||
|
|
continue;
|
||
|
|
brcmf_msgbuf_delete_flowring(drvr, flowid);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
flow->addr_mode[ifidx] = addr_mode;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void brcmf_flowring_delete_peer(struct brcmf_flowring *flow, int ifidx,
|
||
|
|
u8 peer[ETH_ALEN])
|
||
|
|
{
|
||
|
|
struct brcmf_bus *bus_if = dev_get_drvdata(flow->dev);
|
||
|
|
struct brcmf_pub *drvr = bus_if->drvr;
|
||
|
|
struct brcmf_flowring_hash *hash;
|
||
|
|
struct brcmf_flowring_tdls_entry *prev;
|
||
|
|
struct brcmf_flowring_tdls_entry *search;
|
||
|
|
u32 i;
|
||
|
|
u16 flowid;
|
||
|
|
bool sta;
|
||
|
|
|
||
|
|
sta = (flow->addr_mode[ifidx] == ADDR_INDIRECT);
|
||
|
|
|
||
|
|
search = flow->tdls_entry;
|
||
|
|
prev = NULL;
|
||
|
|
while (search) {
|
||
|
|
if (memcmp(search->mac, peer, ETH_ALEN) == 0) {
|
||
|
|
sta = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
prev = search;
|
||
|
|
search = search->next;
|
||
|
|
}
|
||
|
|
|
||
|
|
hash = flow->hash;
|
||
|
|
for (i = 0; i < BRCMF_FLOWRING_HASHSIZE; i++) {
|
||
|
|
if ((sta || (memcmp(hash[i].mac, peer, ETH_ALEN) == 0)) &&
|
||
|
|
(hash[i].ifidx == ifidx)) {
|
||
|
|
flowid = flow->hash[i].flowid;
|
||
|
|
if (flow->rings[flowid]->status == RING_OPEN)
|
||
|
|
brcmf_msgbuf_delete_flowring(drvr, flowid);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (search) {
|
||
|
|
if (prev)
|
||
|
|
prev->next = search->next;
|
||
|
|
else
|
||
|
|
flow->tdls_entry = search->next;
|
||
|
|
kfree(search);
|
||
|
|
if (flow->tdls_entry == NULL)
|
||
|
|
flow->tdls_active = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void brcmf_flowring_add_tdls_peer(struct brcmf_flowring *flow, int ifidx,
|
||
|
|
u8 peer[ETH_ALEN])
|
||
|
|
{
|
||
|
|
struct brcmf_flowring_tdls_entry *tdls_entry;
|
||
|
|
struct brcmf_flowring_tdls_entry *search;
|
||
|
|
|
||
|
|
tdls_entry = kzalloc(sizeof(*tdls_entry), GFP_ATOMIC);
|
||
|
|
if (tdls_entry == NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
memcpy(tdls_entry->mac, peer, ETH_ALEN);
|
||
|
|
tdls_entry->next = NULL;
|
||
|
|
if (flow->tdls_entry == NULL) {
|
||
|
|
flow->tdls_entry = tdls_entry;
|
||
|
|
} else {
|
||
|
|
search = flow->tdls_entry;
|
||
|
|
if (memcmp(search->mac, peer, ETH_ALEN) == 0)
|
||
|
|
goto free_entry;
|
||
|
|
while (search->next) {
|
||
|
|
search = search->next;
|
||
|
|
if (memcmp(search->mac, peer, ETH_ALEN) == 0)
|
||
|
|
goto free_entry;
|
||
|
|
}
|
||
|
|
search->next = tdls_entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
flow->tdls_active = true;
|
||
|
|
return;
|
||
|
|
|
||
|
|
free_entry:
|
||
|
|
kfree(tdls_entry);
|
||
|
|
}
|