#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
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
*
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
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;
};
/*
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);
}
}
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)
}
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,
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");
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;
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
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++;
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;
* 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)
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)
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)
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)
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;
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)
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;
}
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:
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;
{
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;
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);
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
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)
{
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;
}
}
/* 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;
}
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",
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)
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)
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 |
}
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);
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);
}
projects / linux-beck.git / commitdiff