diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c | 20 | ||||
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h | 6 | ||||
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c | 661 |
3 files changed, 627 insertions, 60 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c index 757701d57e5a..bd16f0b17aab 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c @@ -130,7 +130,7 @@ ssize_t brcmf_debugfs_fws_stats_read(struct file *f, char __user *data, size_t count, loff_t *ppos) { struct brcmf_fws_stats *fwstats = f->private_data; - char buf[100]; + char buf[650]; int res; /* only allow read from start */ @@ -145,12 +145,17 @@ ssize_t brcmf_debugfs_fws_stats_read(struct file *f, char __user *data, "mac_update_fails: %u\n" "pkt2bus: %u\n" "generic_error: %u\n" + "rollback_success: %u\n" + "rollback_failed: %u\n" + "delayq_full: %u\n" + "supprq_full: %u\n" "txs_indicate: %u\n" "txs_discard: %u\n" "txs_suppr_core: %u\n" "txs_suppr_ps: %u\n" "txs_tossed: %u\n" - "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n", + "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n" + "fifo_credits_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n", fwstats->header_pulls, fwstats->header_only_pkt, fwstats->tlv_parse_failed, @@ -158,6 +163,10 @@ ssize_t brcmf_debugfs_fws_stats_read(struct file *f, char __user *data, fwstats->mac_update_failed, fwstats->pkt2bus, fwstats->generic_error, + fwstats->rollback_success, + fwstats->rollback_failed, + fwstats->delayq_full_error, + fwstats->supprq_full_error, fwstats->txs_indicate, fwstats->txs_discard, fwstats->txs_supp_core, @@ -165,7 +174,12 @@ ssize_t brcmf_debugfs_fws_stats_read(struct file *f, char __user *data, fwstats->txs_tossed, fwstats->send_pkts[0], fwstats->send_pkts[1], fwstats->send_pkts[2], fwstats->send_pkts[3], - fwstats->send_pkts[4]); + fwstats->send_pkts[4], + fwstats->fifo_credits_sent[0], + fwstats->fifo_credits_sent[1], + fwstats->fifo_credits_sent[2], + fwstats->fifo_credits_sent[3], + fwstats->fifo_credits_sent[4]); return simple_read_from_buffer(data, count, ppos, buf, res); } diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h index 30c2e9b9fadd..a6b16a1e72fb 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h @@ -140,8 +140,14 @@ struct brcmf_fws_stats { u32 header_pulls; u32 pkt2bus; u32 send_pkts[5]; + u32 fifo_credits_sent[5]; + u32 fifo_credits_back[6]; u32 generic_error; u32 mac_update_failed; + u32 rollback_success; + u32 rollback_failed; + u32 delayq_full_error; + u32 supprq_full_error; u32 txs_indicate; u32 txs_discard; u32 txs_supp_core; diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c index 22a6eb2c7bf7..8ce79af47e66 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c @@ -130,15 +130,13 @@ static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) #define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020 #define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040 -#define BRCMF_FWS_STATE_OPEN 1 -#define BRCMF_FWS_STATE_CLOSE 2 - #define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32 -#define BRCMF_FWS_MAX_IFNUM 16 #define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff #define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0 #define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1 +#define BRCMF_FWS_FLOWCONTROL_HIWATER 128 +#define BRCMF_FWS_FLOWCONTROL_LOWATER 64 #define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2) #define BRCMF_FWS_PSQ_LEN 256 @@ -313,6 +311,11 @@ enum brcmf_fws_fcmode { BRCMF_FWS_FCMODE_EXPLICIT_CREDIT }; +enum brcmf_fws_mac_desc_state { + BRCMF_FWS_STATE_OPEN = 1, + BRCMF_FWS_STATE_CLOSE +}; + /** * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface * @@ -338,10 +341,16 @@ struct brcmf_fws_mac_descriptor { u8 generation; u8 ac_bitmap; u8 requested_credit; + u8 requested_packet; u8 ea[ETH_ALEN]; u8 seq[BRCMF_FWS_FIFO_COUNT]; struct pktq psq; int transit_count; + int suppress_count; + int suppr_transit_count; + bool send_tim_signal; + u8 traffic_pending_bmp; + u8 traffic_lastreported_bmp; }; #define BRCMF_FWS_HANGER_MAXITEMS 1024 @@ -394,14 +403,25 @@ struct brcmf_fws_hanger { struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS]; }; +struct brcmf_fws_macdesc_table { + struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; + struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS]; + struct brcmf_fws_mac_descriptor other; +}; + struct brcmf_fws_info { struct brcmf_pub *drvr; struct brcmf_fws_stats stats; struct brcmf_fws_hanger hanger; - struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; - struct brcmf_fws_mac_descriptor other; enum brcmf_fws_fcmode fcmode; + struct brcmf_fws_macdesc_table desc; + struct workqueue_struct *fws_wq; + struct work_struct fws_dequeue_work; + u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; int fifo_credit[BRCMF_FWS_FIFO_COUNT]; + int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; + u32 fifo_credit_map; + u32 fifo_delay_map; }; /* @@ -465,7 +485,7 @@ static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, for (prec = 0; prec < q->num_prec; prec++) { skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); while (skb) { - brcmf_txfinalize(fws->drvr, skb, false); + brcmu_pkt_buf_free_skb(skb); skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); } } @@ -491,7 +511,7 @@ static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) while (i != h->slot_pos) { if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { h->slot_pos = i; - return i; + goto done; } i++; if (i == BRCMF_FWS_HANGER_MAXITEMS) @@ -499,7 +519,10 @@ static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) } brcmf_err("all slots occupied\n"); h->failed_slotfind++; - return BRCMF_FWS_HANGER_MAXITEMS; + i = BRCMF_FWS_HANGER_MAXITEMS; +done: + brcmf_dbg(TRACE, "exit: %d\n", i); + return i; } static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, @@ -545,7 +568,7 @@ static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, return 0; } -static __used int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, +static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, u32 slot_id, u8 gen) { brcmf_dbg(TRACE, "enter\n"); @@ -583,10 +606,11 @@ static int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger, return 0; } -static void brcmf_fws_hanger_cleanup(struct brcmf_fws_hanger *h, +static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, bool (*fn)(struct sk_buff *, void *), int ifidx) { + struct brcmf_fws_hanger *h = &fws->hanger; struct sk_buff *skb; int i; enum brcmf_fws_hanger_item_state s; @@ -611,14 +635,16 @@ static void brcmf_fws_hanger_cleanup(struct brcmf_fws_hanger *h, static void brcmf_fws_init_mac_descriptor(struct brcmf_fws_mac_descriptor *desc, u8 *addr, u8 ifidx) { - brcmf_dbg(TRACE, "enter: ea=%pM, ifidx=%u\n", addr, ifidx); + brcmf_dbg(TRACE, + "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); desc->occupied = 1; desc->state = BRCMF_FWS_STATE_OPEN; desc->requested_credit = 0; /* depending on use may need ifp->bssidx instead */ desc->interface_id = ifidx; desc->ac_bitmap = 0xff; /* update this when handling APSD */ - memcpy(&desc->ea[0], addr, ETH_ALEN); + if (addr) + memcpy(&desc->ea[0], addr, ETH_ALEN); } static @@ -641,8 +667,8 @@ brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea) if (ea == NULL) return ERR_PTR(-EINVAL); - entry = &fws->nodes[0]; - for (i = 0; i < ARRAY_SIZE(fws->nodes); i++) { + entry = &fws->desc.nodes[0]; + for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) { if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) return entry; entry++; @@ -654,7 +680,7 @@ brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea) static struct brcmf_fws_mac_descriptor* brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, int ifidx, u8 *da) { - struct brcmf_fws_mac_descriptor *entry = &fws->other; + struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; struct brcmf_if *ifp; bool multicast; @@ -670,7 +696,7 @@ brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, int ifidx, u8 *da) * example, TDLS destinations have their own entry. */ entry = NULL; - if ((/* ifp->iftype == 0 ||*/ multicast) && ifp->fws_desc) + if (multicast && ifp->fws_desc) entry = ifp->fws_desc; if (entry != NULL && multicast) @@ -678,13 +704,35 @@ brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, int ifidx, u8 *da) entry = brcmf_fws_mac_descriptor_lookup(fws, da); if (IS_ERR(entry)) - entry = &fws->other; + entry = &fws->desc.other; done: brcmf_dbg(TRACE, "exit: entry=%p\n", entry); return entry; } +static bool brcmf_fws_mac_desc_ready(struct brcmf_fws_mac_descriptor *entry, + int fifo) +{ + bool ready; + + /* + * destination entry is ready when firmware says it is OPEN + * and there are no packets enqueued for it. + */ + ready = entry->state == BRCMF_FWS_STATE_OPEN && + !entry->suppressed && + brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0; + + /* + * Or when the destination entry is CLOSED, but firmware has + * specifically requested packets for this entry. + */ + ready = ready || (entry->state == BRCMF_FWS_STATE_CLOSE && + (entry->requested_credit + entry->requested_packet)); + return ready; +} + static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_info *fws, struct brcmf_fws_mac_descriptor *entry, int ifidx) @@ -743,13 +791,53 @@ static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) matchfn = brcmf_fws_ifidx_match; /* cleanup individual nodes */ - table = &fws->nodes[0]; - for (i = 0; i < ARRAY_SIZE(fws->nodes); i++) + table = &fws->desc.nodes[0]; + for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) brcmf_fws_mac_desc_cleanup(fws, &table[i], ifidx); - brcmf_fws_mac_desc_cleanup(fws, &fws->other, ifidx); + brcmf_fws_mac_desc_cleanup(fws, &fws->desc.other, ifidx); brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); - brcmf_fws_hanger_cleanup(&fws->hanger, matchfn, ifidx); + brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); +} + +static void brcmf_fws_tim_update(struct brcmf_fws_info *ctx, + struct brcmf_fws_mac_descriptor *entry, + int prec) +{ + brcmf_dbg(TRACE, "enter: ea=%pM\n", entry->ea); + if (entry->state == BRCMF_FWS_STATE_CLOSE) { + /* check delayedQ and suppressQ in one call using bitmap */ + if (brcmu_pktq_mlen(&entry->psq, 3 << (prec * 2)) == 0) + entry->traffic_pending_bmp = + entry->traffic_pending_bmp & ~NBITVAL(prec); + else + entry->traffic_pending_bmp = + entry->traffic_pending_bmp | NBITVAL(prec); + } + /* request a TIM update to firmware at the next piggyback opportunity */ + if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) + entry->send_tim_signal = true; +} + +static void +brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, + u8 if_id) +{ + struct brcmf_if *ifp = fws->drvr->iflist[if_id]; + + brcmf_dbg(TRACE, + "enter: bssidx=%d, ifidx=%d\n", ifp->bssidx, ifp->ifidx); + if (WARN_ON(!ifp)) + return; + + if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && + pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) + brcmf_txflowblock_if(ifp, + BRCMF_NETIF_STOP_REASON_FWS_FC, false); + if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && + pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) + brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); + return; } static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) @@ -770,7 +858,7 @@ int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) ifidx = *data++; addr = data; - entry = &fws->nodes[mac_handle & 0x1F]; + entry = &fws->desc.nodes[mac_handle & 0x1F]; if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { brcmf_dbg(TRACE, "deleting mac %pM idx %d\n", addr, ifidx); if (entry->occupied) @@ -808,25 +896,241 @@ int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) return 0; } +static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, + u8 fifo, u8 credits) +{ + if (!credits) + return; + + fws->fifo_credit_map |= 1 << fifo; + fws->fifo_credit[fifo] += credits; +} + +static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) +{ + /* only schedule dequeue when there are credits for delayed traffic */ + if (fws->fifo_credit_map & fws->fifo_delay_map) + queue_work(fws->fws_wq, &fws->fws_dequeue_work); +} + +static void brcmf_skb_pick_up_credit(struct brcmf_fws_info *fws, int fifo, + struct sk_buff *p) +{ + struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(p)->mac; + + if (brcmf_skbcb(p)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) { + if (fws->fcmode != BRCMF_FWS_FCMODE_IMPLIED_CREDIT) + return; + brcmf_fws_return_credits(fws, fifo, 1); + } else { + /* + * if this packet did not count against FIFO credit, it + * must have taken a requested_credit from the destination + * entry (for pspoll etc.) + */ + if (!brcmf_skb_if_flags_get_field(p, REQUESTED)) + entry->requested_credit++; + } + brcmf_fws_schedule_deq(fws); +} + +static int brcmf_fws_enq(struct brcmf_fws_info *fws, + enum brcmf_fws_skb_state state, int fifo, + struct sk_buff *p) +{ + int prec = 2 * fifo; + u32 *qfull_stat = &fws->stats.delayq_full_error; + + struct brcmf_fws_mac_descriptor *entry; + + entry = brcmf_skbcb(p)->mac; + if (entry == NULL) { + brcmf_err("no mac descriptor found for skb %p\n", p); + return -ENOENT; + } + + brcmf_dbg(TRACE, "enter: ea=%pM, qlen=%d\n", entry->ea, entry->psq.len); + if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { + prec += 1; + qfull_stat = &fws->stats.supprq_full_error; + } + + if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { + *qfull_stat += 1; + return -ENFILE; + } + + /* increment total enqueued packet count */ + fws->fifo_delay_map |= 1 << fifo; + fws->fifo_enqpkt[fifo]++; + + /* update the sk_buff state */ + brcmf_skbcb(p)->state = state; + if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) + entry->suppress_count++; + + /* + * A packet has been pushed so update traffic + * availability bitmap, if applicable + */ + brcmf_fws_tim_update(fws, entry, fifo); + brcmf_fws_flow_control_check(fws, &entry->psq, + brcmf_skb_if_flags_get_field(p, INDEX)); + return 0; +} + +static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) +{ + struct brcmf_fws_mac_descriptor *table; + struct brcmf_fws_mac_descriptor *entry; + struct sk_buff *p; + int use_credit = 1; + int num_nodes; + int node_pos; + int prec_out; + int pmsk = 3; + int i; + + table = (struct brcmf_fws_mac_descriptor *)&fws->desc; + num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); + node_pos = fws->deq_node_pos[fifo]; + + for (i = 0; i < num_nodes; i++) { + entry = &table[(node_pos + i) % num_nodes]; + if (!entry->occupied) + continue; + + if (entry->suppressed) + pmsk = 2; + p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); + if (p == NULL) { + if (entry->suppressed) { + if (entry->suppr_transit_count > + entry->suppress_count) + return NULL; + entry->suppressed = false; + p = brcmu_pktq_mdeq(&entry->psq, + 1 << (fifo * 2), &prec_out); + } + } + if (p == NULL) + continue; + + /* did the packet come from suppress sub-queue? */ + if (entry->requested_credit > 0) { + entry->requested_credit--; + /* + * if the packet was pulled out while destination is in + * closed state but had a non-zero packets requested, + * then this should not count against the FIFO credit. + * That is due to the fact that the firmware will + * most likely hold onto this packet until a suitable + * time later to push it to the appropriate AC FIFO. + */ + if (entry->state == BRCMF_FWS_STATE_CLOSE) + use_credit = 0; + } else if (entry->requested_packet > 0) { + entry->requested_packet--; + brcmf_skb_if_flags_set_field(p, REQUESTED, 1); + if (entry->state == BRCMF_FWS_STATE_CLOSE) + use_credit = 0; + } + brcmf_skb_if_flags_set_field(p, CREDITCHECK, use_credit); + + /* move dequeue position to ensure fair round-robin */ + fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; + brcmf_fws_flow_control_check(fws, &entry->psq, + brcmf_skb_if_flags_get_field(p, + INDEX) + ); + /* + * A packet has been picked up, update traffic + * availability bitmap, if applicable + */ + brcmf_fws_tim_update(fws, entry, fifo); + + /* + * decrement total enqueued fifo packets and + * clear delay bitmap if done. + */ + fws->fifo_enqpkt[fifo]--; + if (fws->fifo_enqpkt[fifo] == 0) + fws->fifo_delay_map &= ~(1 << fifo); + goto done; + } + p = NULL; +done: + brcmf_dbg(TRACE, "exit: fifo %d skb %p\n", fifo, p); + return p; +} + +static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, + struct sk_buff *skb, u32 genbit) +{ + struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; + u32 hslot; + int ret; + + hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); + + /* this packet was suppressed */ + if (!entry->suppressed || entry->generation != genbit) { + entry->suppressed = true; + entry->suppress_count = brcmu_pktq_mlen(&entry->psq, + 1 << (fifo * 2 + 1)); + entry->suppr_transit_count = entry->transit_count; + } + + entry->generation = genbit; + + ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb); + if (ret != 0) { + /* suppress q is full, drop this packet */ + brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, + true); + } else { + /* + * Mark suppressed to avoid a double free during + * wlfc cleanup + */ + brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot, + genbit); + entry->suppress_count++; + } + + return ret; +} + static int -brcmf_fws_txstatus_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot) +brcmf_fws_txstatus_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, + u32 genbit) { + u32 fifo; int ret; + bool remove_from_hanger = true; struct sk_buff *skb; struct brcmf_fws_mac_descriptor *entry = NULL; + fws->stats.txs_indicate++; + brcmf_dbg(TRACE, "status: flags=0x%X, hslot=%d\n", flags, hslot); if (flags == BRCMF_FWS_TXSTATUS_DISCARD) fws->stats.txs_discard++; - else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) + else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { + fws->stats.txs_supp_core++; + remove_from_hanger = false; + } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { + fws->stats.txs_supp_ps++; + remove_from_hanger = false; + } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) fws->stats.txs_tossed++; else brcmf_err("unexpected txstatus\n"); ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, - true); + remove_from_hanger); if (ret != 0) { brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); return ret; @@ -834,29 +1138,61 @@ brcmf_fws_txstatus_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot) entry = brcmf_skbcb(skb)->mac; if (WARN_ON(!entry)) { - ret = -EINVAL; - goto done; + brcmu_pkt_buf_free_skb(skb); + return -EINVAL; } - entry->transit_count--; + /* pick up the implicit credit from this packet */ + fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); + brcmf_skb_pick_up_credit(fws, fifo, skb); -done: - brcmf_txfinalize(fws->drvr, skb, true); - return ret; + if (!remove_from_hanger) + ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); + + if (remove_from_hanger || ret) { + entry->transit_count--; + if (entry->suppressed) + entry->suppr_transit_count--; + + brcmf_txfinalize(fws->drvr, skb, true); + } + return 0; +} + +static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, + u8 *data) +{ + int i; + + if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { + brcmf_dbg(INFO, "ignored\n"); + return 0; + } + + brcmf_dbg(TRACE, "enter: data %pM\n", data); + for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) + brcmf_fws_return_credits(fws, i, data[i]); + + brcmf_dbg(INFO, "map: credit %x delay %x\n", fws->fifo_credit_map, + fws->fifo_delay_map); + brcmf_fws_schedule_deq(fws); + return 0; } static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) { u32 status; u32 hslot; + u32 genbit; u8 flags; fws->stats.txs_indicate++; status = le32_to_cpu(*(__le32 *)data); flags = brcmf_txstatus_get_field(status, FLAGS); hslot = brcmf_txstatus_get_field(status, HSLOT); + genbit = brcmf_txstatus_get_field(status, GENERATION); - return brcmf_fws_txstatus_process(fws, flags, hslot); + return brcmf_fws_txstatus_process(fws, flags, hslot, genbit); } static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) @@ -893,9 +1229,21 @@ static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, ulong flags; u8 *credits = data; + if (e->datalen < BRCMF_FWS_FIFO_COUNT) { + brcmf_err("event payload too small (%d)\n", e->datalen); + return -EINVAL; + } + + brcmf_dbg(TRACE, "enter: credits %pM\n", credits); brcmf_fws_lock(ifp->drvr, flags); - for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) + for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { + if (*credits) + fws->fifo_credit_map |= 1 << i; + else + fws->fifo_credit_map &= ~(1 << i); fws->fifo_credit[i] = *credits++; + } + brcmf_fws_schedule_deq(fws); brcmf_fws_unlock(ifp->drvr, flags); return 0; } @@ -958,11 +1306,8 @@ int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, case BRCMF_FWS_TYPE_MAC_OPEN: case BRCMF_FWS_TYPE_MAC_CLOSE: case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: - case BRCMF_FWS_TYPE_PKTTAG: case BRCMF_FWS_TYPE_INTERFACE_OPEN: case BRCMF_FWS_TYPE_INTERFACE_CLOSE: - case BRCMF_FWS_TYPE_FIFO_CREDITBACK: - case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: case BRCMF_FWS_TYPE_COMP_TXSTATUS: @@ -974,12 +1319,17 @@ int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, case BRCMF_FWS_TYPE_TXSTATUS: brcmf_fws_txstatus_indicate(fws, data); break; + case BRCMF_FWS_TYPE_FIFO_CREDITBACK: + brcmf_fws_fifocreditback_indicate(fws, data); + break; case BRCMF_FWS_TYPE_RSSI: brcmf_fws_rssi_indicate(fws, *data); break; case BRCMF_FWS_TYPE_TRANS_ID: brcmf_fws_dbg_seqnum_check(fws, data); break; + case BRCMF_FWS_TYPE_PKTTAG: + case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: default: fws->stats.tlv_invalid_type++; break; @@ -1010,14 +1360,17 @@ static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) { struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; u8 *wlh; - u16 data_offset; + u16 data_offset = 0; u8 fillers; __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); brcmf_dbg(TRACE, "enter: ea=%pM, ifidx=%u, pkttag=0x%08X\n", entry->ea, entry->interface_id, le32_to_cpu(pkttag)); + if (entry->send_tim_signal) + data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; + /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ - data_offset = 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; + data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; fillers = round_up(data_offset, 4) - data_offset; data_offset += fillers; @@ -1029,6 +1382,15 @@ static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) memcpy(&wlh[2], &pkttag, sizeof(pkttag)); wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; + if (entry->send_tim_signal) { + entry->send_tim_signal = 0; + wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; + wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; + wlh[2] = entry->mac_handle; + wlh[3] = entry->traffic_pending_bmp; + wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; + entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; + } if (fillers) memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); @@ -1049,7 +1411,7 @@ static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, u8 ifidx; u8 flags; - header_needed = skcb->state == BRCMF_FWS_SKBSTATE_NEW; + header_needed = skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED; if (header_needed) { /* obtaining free slot may fail, but that will be caught @@ -1099,6 +1461,133 @@ static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, return rc; } +static int +brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, struct sk_buff *skb) +{ + /* + put the packet back to the head of queue + + - suppressed packet goes back to suppress sub-queue + - pull out the header, if new or delayed packet + + Note: hslot is used only when header removal is done. + */ + struct brcmf_fws_mac_descriptor *entry; + enum brcmf_fws_skb_state state; + struct sk_buff *pktout; + int rc = 0; + int fifo; + int hslot; + u8 ifidx; + + fifo = brcmf_skb_if_flags_get_field(skb, FIFO); + state = brcmf_skbcb(skb)->state; + entry = brcmf_skbcb(skb)->mac; + + if (entry != NULL) { + if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { + /* wl-header is saved for suppressed packets */ + pktout = brcmu_pktq_penq_head(&entry->psq, 2 * fifo + 1, + skb); + if (pktout == NULL) { + brcmf_err("suppress queue full\n"); + rc = -ENOSPC; + } + } else { + hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); + + /* remove header first */ + rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); + if (rc) { + brcmf_err("header removal failed\n"); + /* free the hanger slot */ + brcmf_fws_hanger_poppkt(&fws->hanger, hslot, + &pktout, true); + brcmf_txfinalize(fws->drvr, skb, false); + rc = -EINVAL; + goto fail; + } + + /* delay-q packets are going to delay-q */ + pktout = brcmu_pktq_penq_head(&entry->psq, + 2 * fifo, skb); + if (pktout == NULL) { + brcmf_err("delay queue full\n"); + rc = -ENOSPC; + } + + /* free the hanger slot */ + brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &pktout, + true); + + /* decrement sequence count */ + entry->seq[fifo]--; + } + /* + if this packet did not count against FIFO credit, it must have + taken a requested_credit from the firmware (for pspoll etc.) + */ + if (!(brcmf_skbcb(skb)->if_flags & + BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)) + entry->requested_credit++; + } else { + brcmf_err("no mac entry linked\n"); + rc = -ENOENT; + } + + +fail: + if (rc) + fws->stats.rollback_failed++; + else + fws->stats.rollback_success++; + return rc; +} + +static int brcmf_fws_consume_credit(struct brcmf_fws_info *fws, int fifo, + struct sk_buff *skb) +{ + struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; + int *credit = &fws->fifo_credit[fifo]; + int use_credit = 1; + + brcmf_dbg(TRACE, "enter: ac=%d, credits=%d\n", fifo, *credit); + + if (entry->requested_credit > 0) { + /* + * if the packet was pulled out while destination is in + * closed state but had a non-zero packets requested, + * then this should not count against the FIFO credit. + * That is due to the fact that the firmware will + * most likely hold onto this packet until a suitable + * time later to push it to the appropriate AC FIFO. + */ + entry->requested_credit--; + if (entry->state == BRCMF_FWS_STATE_CLOSE) + use_credit = 0; + } else if (entry->requested_packet > 0) { + entry->requested_packet--; + brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); + if (entry->state == BRCMF_FWS_STATE_CLOSE) + use_credit = 0; + } + brcmf_skb_if_flags_set_field(skb, CREDITCHECK, use_credit); + if (!use_credit) { + brcmf_dbg(TRACE, "exit: no creditcheck set\n"); + return 0; + } + + if (!(*credit)) { + brcmf_dbg(TRACE, "exit: credits depleted\n"); + return -ENAVAIL; + } + (*credit)--; + if (!(*credit)) + fws->fifo_credit_map &= ~(1 << fifo); + brcmf_dbg(TRACE, "exit: ac=%d, credits=%d\n", fifo, *credit); + return 0; +} + static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, struct sk_buff *skb) { @@ -1114,19 +1603,24 @@ static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, rc = brcmf_fws_precommit_skb(fws, fifo, skb); if (rc < 0) { fws->stats.generic_error++; - goto done; + goto rollback; } rc = brcmf_bus_txdata(bus, skb); if (rc < 0) - goto done; + goto rollback; entry->seq[fifo]++; fws->stats.pkt2bus++; + if (brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) { + fws->stats.send_pkts[fifo]++; + fws->stats.fifo_credits_sent[fifo]++; + } + return rc; -done: - brcmf_txfinalize(fws->drvr, skb, false); +rollback: + rc = brcmf_fws_rollback_toq(fws, skb); return rc; } @@ -1157,19 +1651,27 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) } /* set control buffer information */ + skcb->if_flags = 0; skcb->mac = brcmf_fws_find_mac_desc(drvr->fws, ifidx, eh->h_dest); skcb->state = BRCMF_FWS_SKBSTATE_NEW; brcmf_skb_if_flags_set_field(skb, INDEX, ifidx); if (!multicast) fifo = brcmf_fws_prio2fifo[skb->priority]; brcmf_skb_if_flags_set_field(skb, FIFO, fifo); - brcmf_skb_if_flags_set_field(skb, CREDITCHECK, 0); brcmf_dbg(TRACE, "ea=%pM, multi=%d, fifo=%d\n", eh->h_dest, multicast, fifo); brcmf_fws_lock(drvr, flags); - brcmf_fws_commit_skb(drvr->fws, fifo, skb); + if (!brcmf_fws_mac_desc_ready(skcb->mac, fifo) || + (!multicast && + brcmf_fws_consume_credit(drvr->fws, fifo, skb) < 0)) { + /* enqueue the packet in delayQ */ + drvr->fws->fifo_delay_map |= 1 << fifo; + brcmf_fws_enq(drvr->fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); + } else { + brcmf_fws_commit_skb(drvr->fws, fifo, skb); + } brcmf_fws_unlock(drvr, flags); return 0; } @@ -1187,6 +1689,7 @@ void brcmf_fws_reset_interface(struct brcmf_if *ifp) void brcmf_fws_add_interface(struct brcmf_if *ifp) { + struct brcmf_fws_info *fws = ifp->drvr->fws; struct brcmf_fws_mac_descriptor *entry; brcmf_dbg(TRACE, "enter: idx=%d, mac=%pM\n", @@ -1194,15 +1697,11 @@ void brcmf_fws_add_interface(struct brcmf_if *ifp) if (!ifp->drvr->fw_signals) return; - entry = kzalloc(sizeof(*entry), GFP_ATOMIC); - if (entry) { - ifp->fws_desc = entry; - brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); - brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, - BRCMF_FWS_PSQ_LEN); - } else { - brcmf_err("no firmware signalling\n"); - } + entry = &fws->desc.iface[ifp->ifidx]; + ifp->fws_desc = entry; + brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); + brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, + BRCMF_FWS_PSQ_LEN); } void brcmf_fws_del_interface(struct brcmf_if *ifp) @@ -1216,7 +1715,35 @@ void brcmf_fws_del_interface(struct brcmf_if *ifp) ifp->fws_desc = NULL; brcmf_fws_clear_mac_descriptor(entry); brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); - kfree(entry); +} + +static void brcmf_fws_dequeue_worker(struct work_struct *worker) +{ + struct brcmf_fws_info *fws; + struct sk_buff *skb; + ulong flags; + int fifo; + int credit; + + fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); + + brcmf_dbg(TRACE, "enter: fws=%p\n", fws); + brcmf_fws_lock(fws->drvr, flags); + for (fifo = NL80211_NUM_ACS; fifo >= 0; fifo--) { + brcmf_dbg(TRACE, "fifo %d credit %d\n", fifo, + fws->fifo_credit[fifo]); + for (credit = 0; credit < fws->fifo_credit[fifo]; /* nop */) { + skb = brcmf_fws_deq(fws, fifo); + if (!skb) + break; + if (!brcmf_fws_commit_skb(fws, fifo, skb) && + brcmf_skbcb(skb)->if_flags & + BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) + credit++; + } + fws->fifo_credit[fifo] -= credit; + } + brcmf_fws_unlock(fws->drvr, flags); } int brcmf_fws_init(struct brcmf_pub *drvr) @@ -1239,6 +1766,14 @@ int brcmf_fws_init(struct brcmf_pub *drvr) drvr->fws->drvr = drvr; drvr->fws->fcmode = fcmode; + drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); + if (drvr->fws->fws_wq == NULL) { + brcmf_err("workqueue creation failed\n"); + rc = -EBADF; + goto fail; + } + INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker); + /* enable firmware signalling if fcmode active */ if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE) tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | @@ -1257,6 +1792,9 @@ int brcmf_fws_init(struct brcmf_pub *drvr) } brcmf_fws_hanger_init(&drvr->fws->hanger); + brcmf_fws_init_mac_descriptor(&drvr->fws->desc.other, NULL, 0); + brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, + BRCMF_FWS_PSQ_LEN); /* create debugfs file for statistics */ brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats); @@ -1306,6 +1844,15 @@ void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) brcmf_fws_lock(fws->drvr, flags); brcmf_fws_txstatus_process(fws, BRCMF_FWS_TXSTATUS_FW_TOSSED, - brcmf_skb_htod_tag_get_field(skb, HSLOT)); + brcmf_skb_htod_tag_get_field(skb, HSLOT), 0); + /* the packet never reached firmware so reclaim credit */ + if (fws->fcmode == BRCMF_FWS_FCMODE_EXPLICIT_CREDIT && + brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) { + brcmf_fws_return_credits(fws, + brcmf_skb_htod_tag_get_field(skb, + FIFO), + 1); + brcmf_fws_schedule_deq(fws); + } brcmf_fws_unlock(fws->drvr, flags); } |