#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/err.h>
#include <uapi/linux/nl80211.h>
+#include <net/cfg80211.h>
#include <brcmu_utils.h>
#include <brcmu_wifi.h>
#include "dhd.h"
+#include "dhd_proto.h"
#include "dhd_dbg.h"
#include "dhd_bus.h"
#include "fwil.h"
BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
-/**
+/*
* enum brcmf_fws_tlv_type - definition of tlv identifiers.
*/
#define BRCMF_FWS_TLV_DEF(name, id, len) \
};
#undef BRCMF_FWS_TLV_DEF
+/*
+ * enum brcmf_fws_tlv_len - definition of tlv lengths.
+ */
+#define BRCMF_FWS_TLV_DEF(name, id, len) \
+ BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
+enum brcmf_fws_tlv_len {
+ BRCMF_FWS_TLV_DEFLIST
+};
+#undef BRCMF_FWS_TLV_DEF
+
#ifdef DEBUG
-/**
+/*
* brcmf_fws_tlv_names - array of tlv names.
*/
#define BRCMF_FWS_TLV_DEF(name, id, len) \
}
#endif /* DEBUG */
-/**
+/*
* flags used to enable tlv signalling from firmware.
*/
#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
-#define BRCMF_FWS_HANGER_MAXITEMS 1024
-#define BRCMF_FWS_HANGER_ITEM_STATE_FREE 1
-#define BRCMF_FWS_HANGER_ITEM_STATE_INUSE 2
-#define BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 3
-
#define BRCMF_FWS_STATE_OPEN 1
#define BRCMF_FWS_STATE_CLOSE 2
#define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2)
#define BRCMF_FWS_PSQ_LEN 256
+#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
+#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
+
/**
* enum brcmf_fws_skb_state - indicates processing state of skb.
+ *
+ * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
+ * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
+ * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
*/
enum brcmf_fws_skb_state {
- WLFC_PKTTYPE_NEW,
- WLFC_PKTTYPE_DELAYED,
- WLFC_PKTTYPE_SUPPRESSED,
- WLFC_PKTTYPE_MAX
+ BRCMF_FWS_SKBSTATE_NEW,
+ BRCMF_FWS_SKBSTATE_DELAYED,
+ BRCMF_FWS_SKBSTATE_SUPPRESSED
};
/**
* struct brcmf_skbuff_cb - control buffer associated with skbuff.
*
* @if_flags: holds interface index and packet related flags.
- * @da: destination MAC address extracted from skbuff once.
* @htod: host to device packet identifier (used in PKTTAG tlv).
- * @needs_hdr: the packet does not yet have a BDC header.
* @state: transmit state of the packet.
* @mac: descriptor related to destination for this packet.
*
*/
struct brcmf_skbuff_cb {
u16 if_flags;
- u8 da[ETH_ALEN];
u32 htod;
- u8 needs_hdr;
enum brcmf_fws_skb_state state;
struct brcmf_fws_mac_descriptor *mac;
};
-/**
+/*
* macro casting skbuff control buffer to struct brcmf_skbuff_cb.
*/
#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
-/**
+/*
* sk_buff control if flags
*
* b[11] - packet sent upon firmware request.
BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
-/**
+/*
* sk_buff control packet identifier
*
* 32-bit packet identifier used in PKTTAG tlv from host to dongle.
BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
+#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
+#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
+#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
+#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
+#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
+#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
+#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
+#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
+#define BRCMF_FWS_TXSTAT_PKTID_MASK 0x00FFFFFF
+#define BRCMF_FWS_TXSTAT_PKTID_SHIFT 0
+
+#define brcmf_txstatus_get_field(txs, field) \
+ brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
+ BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
+
+/**
+ * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
+ *
+ * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
+ * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
+ * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
+ * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
+ * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
+ * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
+ * @BRCMF_FWS_FIFO_COUNT: number of fifos.
+ */
+enum brcmf_fws_fifo {
+ BRCMF_FWS_FIFO_AC_BK,
+ BRCMF_FWS_FIFO_AC_BE,
+ BRCMF_FWS_FIFO_AC_VI,
+ BRCMF_FWS_FIFO_AC_VO,
+ BRCMF_FWS_FIFO_BCMC,
+ BRCMF_FWS_FIFO_ATIM,
+ BRCMF_FWS_FIFO_COUNT
+};
+
+/**
+ * enum brcmf_fws_txstatus - txstatus flag values.
+ *
+ * @BRCMF_FWS_TXSTATUS_DISCARD:
+ * host is free to discard the packet.
+ * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
+ * 802.11 core suppressed the packet.
+ * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
+ * firmware suppress the packet as device is already in PS mode.
+ * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
+ * firmware tossed the packet.
+ */
+enum brcmf_fws_txstatus {
+ BRCMF_FWS_TXSTATUS_DISCARD,
+ BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
+ BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
+ BRCMF_FWS_TXSTATUS_FW_TOSSED
+};
+
enum brcmf_fws_fcmode {
BRCMF_FWS_FCMODE_NONE,
BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
* @mac_handle: handle for mac entry determined by firmware.
* @interface_id: interface index.
* @state: current state.
+ * @suppressed: mac entry is suppressed.
+ * @generation: generation bit.
* @ac_bitmap: ac queue bitmap.
* @requested_credit: credits requested by firmware.
* @ea: ethernet address.
+ * @seq: per-node free-running sequence.
* @psq: power-save queue.
+ * @transit_count: packet in transit to firmware.
*/
struct brcmf_fws_mac_descriptor {
u8 occupied;
u8 mac_handle;
u8 interface_id;
u8 state;
+ bool suppressed;
+ u8 generation;
u8 ac_bitmap;
u8 requested_credit;
u8 ea[ETH_ALEN];
+ u8 seq[BRCMF_FWS_FIFO_COUNT];
struct pktq psq;
+ int transit_count;
};
#define BRCMF_FWS_HANGER_MAXITEMS 1024
/**
* enum brcmf_fws_hanger_item_state - state of hanger item.
*
- * @WLFC_HANGER_ITEM_STATE_FREE: item is free for use.
- * @WLFC_HANGER_ITEM_STATE_INUSE: item is in use.
- * @WLFC_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
+ * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
+ * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
+ * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
*/
enum brcmf_fws_hanger_item_state {
- WLFC_HANGER_ITEM_STATE_FREE = 1,
- WLFC_HANGER_ITEM_STATE_INUSE,
- WLFC_HANGER_ITEM_STATE_INUSE_SUPPRESSED
+ BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
+ BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
+ BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
};
*
* @state: entry is either free or occupied.
* @gen: generation.
- * @identifier: packet identifier.
* @pkt: packet itself.
*/
struct brcmf_fws_hanger_item {
enum brcmf_fws_hanger_item_state state;
u8 gen;
- u8 pad[2];
- u32 identifier;
struct sk_buff *pkt;
};
/**
* struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
*
- * @max_items: number of packets it can hold.
* @pushed: packets pushed to await txstatus.
* @popped: packets popped upon handling txstatus.
* @failed_to_push: packets that could not be pushed.
struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
struct brcmf_fws_mac_descriptor other;
enum brcmf_fws_fcmode fcmode;
- int fifo_credit[NL80211_NUM_ACS+1+1];
+ int fifo_credit[BRCMF_FWS_FIFO_COUNT];
+};
+
+/*
+ * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
+ */
+static const int brcmf_fws_prio2fifo[] = {
+ BRCMF_FWS_FIFO_AC_BE,
+ BRCMF_FWS_FIFO_AC_BK,
+ BRCMF_FWS_FIFO_AC_BK,
+ BRCMF_FWS_FIFO_AC_BE,
+ BRCMF_FWS_FIFO_AC_VI,
+ BRCMF_FWS_FIFO_AC_VI,
+ BRCMF_FWS_FIFO_AC_VO,
+ BRCMF_FWS_FIFO_AC_VO
};
static int fcmode;
module_param(fcmode, int, S_IRUSR);
MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
-/**
- * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
- */
#define BRCMF_FWS_TLV_DEF(name, id, len) \
case BRCMF_FWS_TYPE_ ## name: \
return len;
+/**
+ * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
+ *
+ * @fws: firmware-signalling information.
+ * @id: identifier of the TLV.
+ *
+ * Return: the specified length for the given TLV; Otherwise -EINVAL.
+ */
static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
enum brcmf_fws_tlv_type id)
{
}
#undef BRCMF_FWS_TLV_DEF
+static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
+{
+ u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
+ return ifidx == *(int *)arg;
+}
+
+static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
+ int ifidx)
+{
+ bool (*matchfn)(struct sk_buff *, void *) = NULL;
+ struct sk_buff *skb;
+ int prec;
+
+ if (ifidx != -1)
+ matchfn = brcmf_fws_ifidx_match;
+ 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);
+ skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
+ }
+ }
+}
+
static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
{
int i;
brcmf_dbg(TRACE, "enter\n");
memset(hanger, 0, sizeof(*hanger));
for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
- hanger->items[i].state = WLFC_HANGER_ITEM_STATE_FREE;
+ hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
}
-static __used u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
+static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
{
u32 i;
i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
while (i != h->slot_pos) {
- if (h->items[i].state == WLFC_HANGER_ITEM_STATE_FREE) {
+ if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
h->slot_pos = i;
return i;
}
return BRCMF_FWS_HANGER_MAXITEMS;
}
-static __used int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
+static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
struct sk_buff *pkt, u32 slot_id)
{
brcmf_dbg(TRACE, "enter\n");
h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
h->items[slot_id].pkt = pkt;
- h->items[slot_id].identifier = slot_id;
h->pushed++;
return 0;
}
-static __used int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
+static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
u32 slot_id, struct sk_buff **pktout,
bool remove_item)
{
if (remove_item) {
h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
h->items[slot_id].pkt = NULL;
- h->items[slot_id].identifier = 0;
h->items[slot_id].gen = 0xff;
h->popped++;
}
h->items[slot_id].gen = gen;
- if (h->items[slot_id].state != WLFC_HANGER_ITEM_STATE_INUSE) {
+ if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_INUSE) {
brcmf_err("entry not in use\n");
return -EINVAL;
}
- h->items[slot_id].state = WLFC_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
+ h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
return 0;
}
-static __used int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger,
+static int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger,
struct sk_buff *pkt, u32 slot_id,
int *gen)
{
return ERR_PTR(-ENOENT);
}
-static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_mac_descriptor *entry,
- bool (*fn)(struct sk_buff *, void *),
+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_if *ifp;
+ bool multicast;
+
+ brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
+
+ multicast = is_multicast_ether_addr(da);
+ ifp = fws->drvr->iflist[ifidx ? ifidx + 1 : 0];
+ if (WARN_ON(!ifp))
+ goto done;
+
+ /* Multicast destination and P2P clients get the interface entry.
+ * STA gets the interface entry if there is no exact match. For
+ * example, TDLS destinations have their own entry.
+ */
+ entry = NULL;
+ if ((/* ifp->iftype == 0 ||*/ multicast) && ifp->fws_desc)
+ entry = ifp->fws_desc;
+
+ if (entry != NULL && multicast)
+ goto done;
+
+ entry = brcmf_fws_mac_descriptor_lookup(fws, da);
+ if (IS_ERR(entry))
+ entry = &fws->other;
+
+done:
+ brcmf_dbg(TRACE, "exit: entry=%p\n", entry);
+ return entry;
+}
+
+static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_info *fws,
+ struct brcmf_fws_mac_descriptor *entry,
int ifidx)
{
- brcmf_dbg(TRACE, "enter: entry=(ea=%pM,ifid=%d), ifidx=%d\n",
+ brcmf_dbg(TRACE, "enter: entry=(ea=%pM, ifid=%d), ifidx=%d\n",
entry->ea, entry->interface_id, ifidx);
- if (entry->occupied && (fn == NULL || (ifidx == entry->interface_id))) {
- brcmf_dbg(TRACE, "flush delayQ: ifidx=%d, qlen=%d\n",
+ if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
+ brcmf_dbg(TRACE, "flush psq: ifidx=%d, qlen=%d\n",
ifidx, entry->psq.len);
- /* release packets held in DELAYQ */
- brcmu_pktq_flush(&entry->psq, true, fn, &ifidx);
+ brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
entry->occupied = !!(entry->psq.len);
}
}
}
}
-static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
-{
- u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
- return ifidx == *(int *)arg;
-}
-
static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
{
int i;
/* cleanup individual nodes */
table = &fws->nodes[0];
for (i = 0; i < ARRAY_SIZE(fws->nodes); i++)
- brcmf_fws_mac_desc_cleanup(&table[i], matchfn, ifidx);
+ brcmf_fws_mac_desc_cleanup(fws, &table[i], ifidx);
- brcmf_fws_mac_desc_cleanup(&fws->other, matchfn, ifidx);
+ brcmf_fws_mac_desc_cleanup(fws, &fws->other, ifidx);
brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
brcmf_fws_hanger_cleanup(&fws->hanger, matchfn, ifidx);
}
entry = &fws->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) {
- entry->occupied = 0;
- entry->state = BRCMF_FWS_STATE_CLOSE;
- entry->requested_credit = 0;
- } else {
+ if (entry->occupied)
+ brcmf_fws_clear_mac_descriptor(entry);
+ else
fws->stats.mac_update_failed++;
- }
return 0;
}
- brcmf_dbg(TRACE, "add mac %pM idx %d\n", addr, ifidx);
+ brcmf_dbg(TRACE,
+ "add mac %pM handle %u idx %d\n", addr, mac_handle, ifidx);
existing = brcmf_fws_mac_descriptor_lookup(fws, addr);
if (IS_ERR(existing)) {
if (!entry->occupied) {
return 0;
}
+static int
+brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
+{
+ u8 flags;
+ u32 status;
+ u32 hslot;
+ int ret;
+ struct sk_buff *skb;
+ struct brcmf_fws_mac_descriptor *entry = NULL;
+
+ status = le32_to_cpu(*(__le32 *)data);
+ flags = brcmf_txstatus_get_field(status, FLAGS);
+ hslot = brcmf_txstatus_get_field(status, HSLOT);
+ 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)
+ fws->stats.txs_tossed++;
+ else
+ brcmf_err("unexpected txstatus\n");
+
+ ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
+ true);
+ 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;
+ }
+
+ entry->transit_count--;
+
+done:
+ brcmf_txfinalize(fws->drvr, skb, true);
+ return ret;
+}
+
static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
{
__le32 timestamp;
/* enable rssi signals */
if (drvr->fw_signals)
tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS |
- BRCMF_FWS_FLAGS_XONXOFF_SIGNALS;
+ BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
+ BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS;
spin_lock_init(&drvr->fws_spinlock);
case BRCMF_FWS_TYPE_MAC_OPEN:
case BRCMF_FWS_TYPE_MAC_CLOSE:
case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
- case BRCMF_FWS_TYPE_TXSTATUS:
case BRCMF_FWS_TYPE_PKTTAG:
case BRCMF_FWS_TYPE_INTERFACE_OPEN:
case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
case BRCMF_FWS_TYPE_MACDESC_DEL:
brcmf_fws_macdesc_indicate(fws, type, data);
break;
+ case BRCMF_FWS_TYPE_TXSTATUS:
+ brcmf_fws_txstatus_indicate(fws, data);
+ break;
case BRCMF_FWS_TYPE_RSSI:
brcmf_fws_rssi_indicate(fws, *data);
break;
return 0;
}
+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;
+ 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));
+ /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
+ data_offset = 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
+ fillers = round_up(data_offset, 4) - data_offset;
+ data_offset += fillers;
+
+ skb_push(skb, data_offset);
+ wlh = skb->data;
+
+ wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
+ wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
+ memcpy(&wlh[2], &pkttag, sizeof(pkttag));
+ wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2;
+
+ if (fillers)
+ memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
+
+ brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
+ data_offset >> 2, skb);
+ return 0;
+}
+
+static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
+ struct sk_buff *p)
+{
+ struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
+ struct brcmf_fws_mac_descriptor *entry = skcb->mac;
+ int rc = 0;
+ bool header_needed;
+ int hslot = BRCMF_FWS_HANGER_MAXITEMS;
+ u8 free_ctr;
+ u8 ifidx;
+ u8 flags;
+
+ header_needed = skcb->state == BRCMF_FWS_SKBSTATE_NEW;
+
+ if (header_needed) {
+ /* obtaining free slot may fail, but that will be caught
+ * by the hanger push. This assures the packet has a BDC
+ * header upon return.
+ */
+ hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
+ free_ctr = entry->seq[fifo];
+ brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
+ brcmf_skb_htod_tag_set_field(p, FREERUN, free_ctr);
+ brcmf_skb_htod_tag_set_field(p, GENERATION, 1);
+ entry->transit_count++;
+ }
+ brcmf_skb_if_flags_set_field(p, TRANSMIT, 1);
+ brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
+
+ flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
+ if (!(skcb->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)) {
+ /*
+ Indicate that this packet is being sent in response to an
+ explicit request from the firmware side.
+ */
+ flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
+ }
+ brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
+ if (header_needed) {
+ brcmf_fws_hdrpush(fws, p);
+ rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
+ if (rc)
+ brcmf_err("hanger push failed: rc=%d\n", rc);
+ } else {
+ int gen;
+
+ /* remove old header */
+ rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, p);
+ if (rc == 0) {
+ hslot = brcmf_skb_htod_tag_get_field(p, HSLOT);
+ brcmf_fws_hanger_get_genbit(&fws->hanger, p,
+ hslot, &gen);
+ brcmf_skb_htod_tag_set_field(p, GENERATION, gen);
+
+ /* push new header */
+ brcmf_fws_hdrpush(fws, p);
+ }
+ }
+
+ return rc;
+}
+
+static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
+ struct sk_buff *skb)
+{
+ struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
+ struct brcmf_fws_mac_descriptor *entry;
+ struct brcmf_bus *bus = fws->drvr->bus_if;
+ int rc;
+
+ entry = skcb->mac;
+ if (IS_ERR(entry))
+ return PTR_ERR(entry);
+
+ rc = brcmf_fws_precommit_skb(fws, fifo, skb);
+ if (rc < 0) {
+ fws->stats.generic_error++;
+ goto done;
+ }
+
+ rc = brcmf_bus_txdata(bus, skb);
+ if (rc < 0)
+ goto done;
+
+ entry->seq[fifo]++;
+ fws->stats.pkt2bus++;
+ return rc;
+
+done:
+ brcmf_txfinalize(fws->drvr, skb, false);
+ return rc;
+}
+
+int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
+{
+ struct brcmf_pub *drvr = ifp->drvr;
+ struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
+ struct ethhdr *eh = (struct ethhdr *)(skb->data);
+ ulong flags;
+ u8 ifidx = ifp->ifidx;
+ int fifo = BRCMF_FWS_FIFO_BCMC;
+ bool multicast = is_multicast_ether_addr(eh->h_dest);
+
+ /* determine the priority */
+ if (!skb->priority)
+ skb->priority = cfg80211_classify8021d(skb);
+
+ drvr->tx_multicast += !!multicast;
+ if (ntohs(eh->h_proto) == ETH_P_PAE)
+ atomic_inc(&ifp->pend_8021x_cnt);
+
+ if (!brcmf_fws_fc_active(drvr->fws)) {
+ /* If the protocol uses a data header, apply it */
+ brcmf_proto_hdrpush(drvr, ifidx, 0, skb);
+
+ /* Use bus module to send data frame */
+ return brcmf_bus_txdata(drvr->bus_if, skb);
+ }
+
+ /* set control buffer information */
+ 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);
+ brcmf_fws_unlock(drvr, flags);
+ return 0;
+}
+
void brcmf_fws_reset_interface(struct brcmf_if *ifp)
{
struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
projects / mirror_ubuntu-disco-kernel.git / commitdiff