summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c')
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c2067
1 files changed, 2067 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
new file mode 100644
index 000000000000..5352dc1fdf3c
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
@@ -0,0 +1,2067 @@
+/*
+ * Copyright (c) 2010 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/if_ether.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/err.h>
+#include <linux/jiffies.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"
+#include "fwil_types.h"
+#include "fweh.h"
+#include "fwsignal.h"
+#include "p2p.h"
+#include "wl_cfg80211.h"
+
+/**
+ * DOC: Firmware Signalling
+ *
+ * Firmware can send signals to host and vice versa, which are passed in the
+ * data packets using TLV based header. This signalling layer is on top of the
+ * BDC bus protocol layer.
+ */
+
+/*
+ * single definition for firmware-driver flow control tlv's.
+ *
+ * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
+ * A length value 0 indicates variable length tlv.
+ */
+#define BRCMF_FWS_TLV_DEFLIST \
+ BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
+ BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
+ BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
+ BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
+ BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
+ BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \
+ BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
+ BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
+ BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
+ BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
+ BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
+ BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
+ BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
+ BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
+ BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
+ 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) \
+ BRCMF_FWS_TYPE_ ## name = id,
+enum brcmf_fws_tlv_type {
+ BRCMF_FWS_TLV_DEFLIST
+ BRCMF_FWS_TYPE_INVALID
+};
+#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) \
+ { id, #name },
+static struct {
+ enum brcmf_fws_tlv_type id;
+ const char *name;
+} brcmf_fws_tlv_names[] = {
+ BRCMF_FWS_TLV_DEFLIST
+};
+#undef BRCMF_FWS_TLV_DEF
+
+static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
+ if (brcmf_fws_tlv_names[i].id == id)
+ return brcmf_fws_tlv_names[i].name;
+
+ return "INVALID";
+}
+#else
+static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
+{
+ return "NODEBUG";
+}
+#endif /* DEBUG */
+
+/*
+ * flags used to enable tlv signalling from firmware.
+ */
+#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
+#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
+#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
+#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
+#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
+#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
+#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
+
+#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
+#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
+
+#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
+#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
+
+#define BRCMF_FWS_RET_OK_NOSCHEDULE 0
+#define BRCMF_FWS_RET_OK_SCHEDULE 1
+
+/**
+ * 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 {
+ 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.
+ * @htod: host to device packet identifier (used in PKTTAG tlv).
+ * @state: transmit state of the packet.
+ * @mac: descriptor related to destination for this packet.
+ *
+ * This information is stored in control buffer struct sk_buff::cb, which
+ * provides 48 bytes of storage so this structure should not exceed that.
+ */
+struct brcmf_skbuff_cb {
+ u16 if_flags;
+ u32 htod;
+ 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.
+ * b[10] - packet only contains signalling data.
+ * b[9] - packet is a tx packet.
+ * b[8] - packet uses FIFO credit (non-pspoll).
+ * b[7] - interface in AP mode.
+ * b[6:4] - AC FIFO number.
+ * b[3:0] - interface index.
+ */
+#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
+#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
+#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
+#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
+#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
+#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
+#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK 0x0100
+#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_SHIFT 8
+#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
+#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
+#define BRCMF_SKB_IF_FLAGS_FIFO_MASK 0x0070
+#define BRCMF_SKB_IF_FLAGS_FIFO_SHIFT 4
+#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
+#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
+
+#define brcmf_skb_if_flags_set_field(skb, field, value) \
+ brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
+ BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
+ BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
+#define brcmf_skb_if_flags_get_field(skb, field) \
+ brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
+ 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.
+ *
+ * - Generated at the host (e.g. dhd)
+ * - Seen as a generic sequence number by firmware except for the flags field.
+ *
+ * Generation : b[31] => generation number for this packet [host->fw]
+ * OR, current generation number [fw->host]
+ * Flags : b[30:27] => command, status flags
+ * FIFO-AC : b[26:24] => AC-FIFO id
+ * h-slot : b[23:8] => hanger-slot
+ * freerun : b[7:0] => A free running counter
+ */
+#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
+#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
+#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
+#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
+#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
+#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
+#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
+#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
+#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
+#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
+
+#define brcmf_skb_htod_tag_set_field(skb, field, value) \
+ brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
+ BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
+ BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
+#define brcmf_skb_htod_tag_get_field(skb, field) \
+ brcmu_maskget32(brcmf_skbcb(skb)->htod, \
+ 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)
+
+/* How long to defer borrowing in jiffies */
+#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
+
+/**
+ * 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,
+ 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
+ *
+ * @occupied: slot is in use.
+ * @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 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
+
+/**
+ * enum brcmf_fws_hanger_item_state - state of hanger item.
+ *
+ * @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 {
+ BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
+ BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
+ BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
+};
+
+
+/**
+ * struct brcmf_fws_hanger_item - single entry for tx pending packet.
+ *
+ * @state: entry is either free or occupied.
+ * @gen: generation.
+ * @pkt: packet itself.
+ */
+struct brcmf_fws_hanger_item {
+ enum brcmf_fws_hanger_item_state state;
+ u8 gen;
+ struct sk_buff *pkt;
+};
+
+/**
+ * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
+ *
+ * @pushed: packets pushed to await txstatus.
+ * @popped: packets popped upon handling txstatus.
+ * @failed_to_push: packets that could not be pushed.
+ * @failed_to_pop: packets that could not be popped.
+ * @failed_slotfind: packets for which failed to find an entry.
+ * @slot_pos: last returned item index for a free entry.
+ * @items: array of hanger items.
+ */
+struct brcmf_fws_hanger {
+ u32 pushed;
+ u32 popped;
+ u32 failed_to_push;
+ u32 failed_to_pop;
+ u32 failed_slotfind;
+ u32 slot_pos;
+ 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;
+ 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 credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
+ int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
+ u32 fifo_credit_map;
+ u32 fifo_delay_map;
+ unsigned long borrow_defer_timestamp;
+};
+
+/*
+ * 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");
+
+#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)
+{
+ switch (id) {
+ BRCMF_FWS_TLV_DEFLIST
+ default:
+ fws->stats.tlv_invalid_type++;
+ break;
+ }
+ return -EINVAL;
+}
+#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) {
+ brcmu_pkt_buf_free_skb(skb);
+ 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 = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
+}
+
+static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
+{
+ u32 i;
+
+ brcmf_dbg(TRACE, "enter\n");
+ i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
+
+ while (i != h->slot_pos) {
+ if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
+ h->slot_pos = i;
+ goto done;
+ }
+ i++;
+ if (i == BRCMF_FWS_HANGER_MAXITEMS)
+ i = 0;
+ }
+ brcmf_err("all slots occupied\n");
+ h->failed_slotfind++;
+ 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,
+ struct sk_buff *pkt, u32 slot_id)
+{
+ brcmf_dbg(TRACE, "enter\n");
+ if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
+ return -ENOENT;
+
+ if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
+ brcmf_err("slot is not free\n");
+ h->failed_to_push++;
+ return -EINVAL;
+ }
+
+ h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
+ h->items[slot_id].pkt = pkt;
+ h->pushed++;
+ return 0;
+}
+
+static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
+ u32 slot_id, struct sk_buff **pktout,
+ bool remove_item)
+{
+ brcmf_dbg(TRACE, "enter\n");
+ if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
+ return -ENOENT;
+
+ if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
+ brcmf_err("entry not in use\n");
+ h->failed_to_pop++;
+ return -EINVAL;
+ }
+
+ *pktout = h->items[slot_id].pkt;
+ if (remove_item) {
+ h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
+ h->items[slot_id].pkt = NULL;
+ h->items[slot_id].gen = 0xff;
+ h->popped++;
+ }
+ return 0;
+}
+
+static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
+ u32 slot_id, u8 gen)
+{
+ brcmf_dbg(TRACE, "enter\n");
+
+ if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
+ return -ENOENT;
+
+ h->items[slot_id].gen = gen;
+
+ 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 = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
+ return 0;
+}
+
+static int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger,
+ struct sk_buff *pkt, u32 slot_id,
+ int *gen)
+{
+ brcmf_dbg(TRACE, "enter\n");
+ *gen = 0xff;
+
+ if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
+ return -ENOENT;
+
+ if (hanger->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
+ brcmf_err("slot not in use\n");
+ return -EINVAL;
+ }
+
+ *gen = hanger->items[slot_id].gen;
+ return 0;
+}
+
+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;
+
+ brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
+ for (i = 0; i < ARRAY_SIZE(h->items); i++) {
+ s = h->items[i].state;
+ if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
+ s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
+ skb = h->items[i].pkt;
+ if (fn == NULL || fn(skb, &ifidx)) {
+ /* suppress packets freed from psq */
+ if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
+ brcmu_pkt_buf_free_skb(skb);
+ h->items[i].state =
+ BRCMF_FWS_HANGER_ITEM_STATE_FREE;
+ }
+ }
+ }
+}
+
+static void brcmf_fws_init_mac_descriptor(struct brcmf_fws_mac_descriptor *desc,
+ u8 *addr, u8 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 */
+ if (addr)
+ memcpy(&desc->ea[0], addr, ETH_ALEN);
+}
+
+static
+void brcmf_fws_clear_mac_descriptor(struct brcmf_fws_mac_descriptor *desc)
+{
+ brcmf_dbg(TRACE,
+ "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
+ desc->occupied = 0;
+ desc->state = BRCMF_FWS_STATE_CLOSE;
+ desc->requested_credit = 0;
+}
+
+static struct brcmf_fws_mac_descriptor *
+brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea)
+{
+ struct brcmf_fws_mac_descriptor *entry;
+ int i;
+
+ brcmf_dbg(TRACE, "enter: ea=%pM\n", ea);
+ if (ea == NULL)
+ return ERR_PTR(-EINVAL);
+
+ 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++;
+ }
+
+ return ERR_PTR(-ENOENT);
+}
+
+static struct brcmf_fws_mac_descriptor*
+brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, struct brcmf_if *ifp,
+ u8 *da)
+{
+ struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
+ bool multicast;
+ enum nl80211_iftype iftype;
+
+ brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
+
+ multicast = is_multicast_ether_addr(da);
+ iftype = brcmf_cfg80211_get_iftype(ifp);
+
+ /* 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 ((multicast || iftype == NL80211_IFTYPE_STATION ||
+ iftype == NL80211_IFTYPE_P2P_CLIENT) && ifp->fws_desc)
+ entry = ifp->fws_desc;
+
+ if (entry != NULL && iftype != NL80211_IFTYPE_STATION)
+ goto done;
+
+ entry = brcmf_fws_mac_descriptor_lookup(fws, da);
+ if (IS_ERR(entry))
+ entry = &fws->desc.other;
+
+done:
+ brcmf_dbg(TRACE, "exit: entry=%p\n", entry);
+ return entry;
+}
+
+static bool brcmf_fws_mac_desc_closed(struct brcmf_fws_info *fws,
+ struct brcmf_fws_mac_descriptor *entry,
+ int fifo)
+{
+ struct brcmf_fws_mac_descriptor *if_entry;
+ bool closed;
+
+ /* for unique destination entries the related interface
+ * may be closed.
+ */
+ if (entry->mac_handle) {
+ if_entry = &fws->desc.iface[entry->interface_id];
+ if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
+ return true;
+ }
+ /* an entry is closed when the state is closed and
+ * the firmware did not request anything.
+ */
+ closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
+ !entry->requested_credit && !entry->requested_packet;
+
+ /* Or firmware does not allow traffic for given fifo */
+ return closed || !(entry->ac_bitmap & BIT(fifo));
+}
+
+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",
+ entry->ea, entry->interface_id, ifidx);
+ if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
+ brcmf_dbg(TRACE, "flush psq: ifidx=%d, qlen=%d\n",
+ ifidx, entry->psq.len);
+ brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
+ entry->occupied = !!(entry->psq.len);
+ }
+}
+
+static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
+ bool (*fn)(struct sk_buff *, void *),
+ int ifidx)
+{
+ struct brcmf_fws_hanger_item *hi;
+ struct pktq *txq;
+ struct sk_buff *skb;
+ int prec;
+ u32 hslot;
+
+ brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
+ txq = brcmf_bus_gettxq(fws->drvr->bus_if);
+ if (IS_ERR(txq)) {
+ brcmf_dbg(TRACE, "no txq to clean up\n");
+ return;
+ }
+
+ for (prec = 0; prec < txq->num_prec; prec++) {
+ skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
+ while (skb) {
+ hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
+ hi = &fws->hanger.items[hslot];
+ WARN_ON(skb != hi->pkt);
+ hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
+ brcmu_pkt_buf_free_skb(skb);
+ skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
+ }
+ }
+}
+
+static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
+{
+ int i;
+ struct brcmf_fws_mac_descriptor *table;
+ bool (*matchfn)(struct sk_buff *, void *) = NULL;
+
+ brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
+ if (fws == NULL)
+ return;
+
+ if (ifidx != -1)
+ matchfn = brcmf_fws_ifidx_match;
+
+ /* cleanup individual nodes */
+ 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->desc.other, ifidx);
+ brcmf_fws_bus_txq_cleanup(fws, 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];
+
+ if (WARN_ON(!ifp))
+ return;
+
+ brcmf_dbg(TRACE,
+ "enter: bssidx=%d, ifidx=%d\n", ifp->bssidx, ifp->ifidx);
+
+ 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)
+{
+ brcmf_dbg(CTL, "rssi %d\n", rssi);
+ return 0;
+}
+
+static
+int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
+{
+ struct brcmf_fws_mac_descriptor *entry, *existing;
+ u8 mac_handle;
+ u8 ifidx;
+ u8 *addr;
+
+ mac_handle = *data++;
+ ifidx = *data++;
+ addr = data;
+
+ 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) {
+ brcmf_fws_mac_desc_cleanup(fws, entry, -1);
+ brcmf_fws_clear_mac_descriptor(entry);
+ } else
+ fws->stats.mac_update_failed++;
+ return 0;
+ }
+
+ 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) {
+ entry->mac_handle = mac_handle;
+ brcmf_fws_init_mac_descriptor(entry, addr, ifidx);
+ brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
+ BRCMF_FWS_PSQ_LEN);
+ } else {
+ fws->stats.mac_update_failed++;
+ }
+ } else {
+ if (entry != existing) {
+ brcmf_dbg(TRACE, "relocate mac\n");
+ memcpy(entry, existing,
+ offsetof(struct brcmf_fws_mac_descriptor, psq));
+ entry->mac_handle = mac_handle;
+ brcmf_fws_clear_mac_descriptor(existing);
+ } else {
+ brcmf_dbg(TRACE, "use existing\n");
+ WARN_ON(entry->mac_handle != mac_handle);
+ /* TODO: what should we do here: continue, reinit, .. */
+ }
+ }
+ return 0;
+}
+
+static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
+ u8 type, u8 *data)
+{
+ struct brcmf_fws_mac_descriptor *entry;
+ u8 mac_handle;
+ int i;
+
+ mac_handle = data[0];
+ entry = &fws->desc.nodes[mac_handle & 0x1F];
+ if (!entry->occupied) {
+ fws->stats.mac_ps_update_failed++;
+ return -ESRCH;
+ }
+
+ /* a state update should wipe old credits? */
+ entry->requested_credit = 0;
+ if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
+ entry->state = BRCMF_FWS_STATE_OPEN;
+ return BRCMF_FWS_RET_OK_SCHEDULE;
+ } else {
+ entry->state = BRCMF_FWS_STATE_CLOSE;
+ for (i = BRCMF_FWS_FIFO_AC_BE; i < NL80211_NUM_ACS; i++)
+ brcmf_fws_tim_update(fws, entry, i);
+ }
+ return BRCMF_FWS_RET_OK_NOSCHEDULE;
+}
+
+static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
+ u8 type, u8 *data)
+{
+ struct brcmf_fws_mac_descriptor *entry;
+ u8 ifidx;
+ int ret;
+
+ ifidx = data[0];
+
+ brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
+ if (ifidx >= BRCMF_MAX_IFS) {
+ ret = -ERANGE;
+ goto fail;
+ }
+
+ entry = &fws->desc.iface[ifidx];
+ if (!entry->occupied) {
+ ret = -ESRCH;
+ goto fail;
+ }
+
+ switch (type) {
+ case BRCMF_FWS_TYPE_INTERFACE_OPEN:
+ entry->state = BRCMF_FWS_STATE_OPEN;
+ return BRCMF_FWS_RET_OK_SCHEDULE;
+ case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
+ entry->state = BRCMF_FWS_STATE_CLOSE;
+ return BRCMF_FWS_RET_OK_NOSCHEDULE;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+fail:
+ fws->stats.if_update_failed++;
+ return ret;
+}
+
+static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
+ u8 *data)
+{
+ struct brcmf_fws_mac_descriptor *entry;
+
+ entry = &fws->desc.nodes[data[1] & 0x1F];
+ if (!entry->occupied) {
+ if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
+ fws->stats.credit_request_failed++;
+ else
+ fws->stats.packet_request_failed++;
+ return -ESRCH;
+ }
+
+ if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
+ entry->requested_credit = data[0];
+ else
+ entry->requested_packet = data[0];
+
+ entry->ac_bitmap = data[2];
+ return BRCMF_FWS_RET_OK_SCHEDULE;
+}
+
+static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
+ u8 fifo, u8 credits)
+{
+ int lender_ac;
+ int *borrowed;
+ int *fifo_credit;
+
+ if (!credits)
+ return;
+
+ if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
+ (fws->credits_borrowed[0])) {
+ for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
+ lender_ac--) {
+ borrowed = &fws->credits_borrowed[lender_ac];
+ if (*borrowed) {
+ fws->fifo_credit_map |= (1 << lender_ac);
+ fifo_credit = &fws->fifo_credit[lender_ac];
+ if (*borrowed >= credits) {
+ *borrowed -= credits;
+ *fifo_credit += credits;
+ return;
+ } else {
+ credits -= *borrowed;
+ *fifo_credit += *borrowed;
+ *borrowed = 0;
+ }
+ }
+ }
+ }
+
+ 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;
+ 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 ||
+ brcmf_fws_mac_desc_closed(fws, entry, fifo))
+ continue;
+
+ if (entry->suppressed)
+ pmsk = 2;
+ else
+ pmsk = 3;
+ 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,
+ u32 genbit)
+{
+ u32 fifo;
+ int ret;
+ bool remove_from_hanger = true;
+ struct sk_buff *skb;
+ struct brcmf_fws_mac_descriptor *entry = NULL;
+
+ 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_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,
+ 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)) {
+ brcmu_pkt_buf_free_skb(skb);
+ return -EINVAL;
+ }
+
+ /* 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);
+
+ 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 BRCMF_FWS_RET_OK_NOSCHEDULE;
+ }
+
+ 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);
+ return BRCMF_FWS_RET_OK_SCHEDULE;
+}
+
+static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
+{
+ __le32 status_le;
+ u32 status;
+ u32 hslot;
+ u32 genbit;
+ u8 flags;
+
+ fws->stats.txs_indicate++;
+ memcpy(&status_le, data, sizeof(status_le));
+ status = le32_to_cpu(status_le);
+ 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, genbit);
+}
+
+static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
+{
+ __le32 timestamp;
+
+ memcpy(&timestamp, &data[2], sizeof(timestamp));
+ brcmf_dbg(INFO, "received: seq %d, timestamp %d\n", data[1],
+ le32_to_cpu(timestamp));
+ return 0;
+}
+
+/* using macro so sparse checking does not complain
+ * about locking imbalance.
+ */
+#define brcmf_fws_lock(drvr, flags) \
+do { \
+ flags = 0; \
+ spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \
+} while (0)
+
+/* using macro so sparse checking does not complain
+ * about locking imbalance.
+ */
+#define brcmf_fws_unlock(drvr, flags) \
+ spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags))
+
+static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
+ const struct brcmf_event_msg *e,
+ void *data)
+{
+ struct brcmf_fws_info *fws = ifp->drvr->fws;
+ int i;
+ 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++) {
+ 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;
+}
+
+int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
+ struct sk_buff *skb)
+{
+ struct brcmf_fws_info *fws = drvr->fws;
+ ulong flags;
+ u8 *signal_data;
+ s16 data_len;
+ u8 type;
+ u8 len;
+ u8 *data;
+ s32 status;
+ s32 err;
+
+ brcmf_dbg(TRACE, "enter: ifidx %d, skblen %u, sig %d\n",
+ ifidx, skb->len, signal_len);
+
+ WARN_ON(signal_len > skb->len);
+
+ /* if flow control disabled, skip to packet data and leave */
+ if (!signal_len || !drvr->fw_signals) {
+ skb_pull(skb, signal_len);
+ return 0;
+ }
+
+ /* lock during tlv parsing */
+ brcmf_fws_lock(drvr, flags);
+
+ fws->stats.header_pulls++;
+ data_len = signal_len;
+ signal_data = skb->data;
+
+ status = BRCMF_FWS_RET_OK_NOSCHEDULE;
+ while (data_len > 0) {
+ /* extract tlv info */
+ type = signal_data[0];
+
+ /* FILLER type is actually not a TLV, but
+ * a single byte that can be skipped.
+ */
+ if (type == BRCMF_FWS_TYPE_FILLER) {
+ signal_data += 1;
+ data_len -= 1;
+ continue;
+ }
+ len = signal_data[1];
+ data = signal_data + 2;
+
+ brcmf_dbg(INFO, "tlv type=%d (%s), len=%d, data[0]=%d\n", type,
+ brcmf_fws_get_tlv_name(type), len, *data);
+
+ /* abort parsing when length invalid */
+ if (data_len < len + 2)
+ break;
+
+ if (len != brcmf_fws_get_tlv_len(fws, type))
+ break;
+
+ err = BRCMF_FWS_RET_OK_NOSCHEDULE;
+ switch (type) {
+ case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
+ case BRCMF_FWS_TYPE_COMP_TXSTATUS:
+ break;
+ case BRCMF_FWS_TYPE_MACDESC_ADD:
+ case BRCMF_FWS_TYPE_MACDESC_DEL:
+ brcmf_fws_macdesc_indicate(fws, type, data);
+ break;
+ case BRCMF_FWS_TYPE_MAC_OPEN:
+ case BRCMF_FWS_TYPE_MAC_CLOSE:
+ err = brcmf_fws_macdesc_state_indicate(fws, type, data);
+ break;
+ case BRCMF_FWS_TYPE_INTERFACE_OPEN:
+ case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
+ err = brcmf_fws_interface_state_indicate(fws, type,
+ data);
+ break;
+ case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
+ case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
+ err = brcmf_fws_request_indicate(fws, type, data);
+ break;
+ case BRCMF_FWS_TYPE_TXSTATUS:
+ brcmf_fws_txstatus_indicate(fws, data);
+ break;
+ case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
+ err = 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;
+ }
+ if (err == BRCMF_FWS_RET_OK_SCHEDULE)
+ status = BRCMF_FWS_RET_OK_SCHEDULE;
+ signal_data += len + 2;
+ data_len -= len + 2;
+ }
+
+ if (data_len != 0)
+ fws->stats.tlv_parse_failed++;
+
+ if (status == BRCMF_FWS_RET_OK_SCHEDULE)
+ brcmf_fws_schedule_deq(fws);
+
+ /* signalling processing result does
+ * not affect the actual ethernet packet.
+ */
+ skb_pull(skb, signal_len);
+
+ /* this may be a signal-only packet
+ */
+ if (skb->len == 0)
+ fws->stats.header_only_pkt++;
+
+ brcmf_fws_unlock(drvr, flags);
+ 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 = 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;
+ 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 (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);
+
+ 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_SUPPRESSED;
+
+ 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 void
+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);
+ 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) {
+ brcmf_txfinalize(fws->drvr, skb, false);
+ fws->stats.rollback_failed++;
+ } else
+ fws->stats.rollback_success++;
+}
+
+static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
+{
+ int lender_ac;
+
+ if (time_after(fws->borrow_defer_timestamp, jiffies))
+ return -ENAVAIL;
+
+ for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
+ if (fws->fifo_credit[lender_ac]) {
+ fws->credits_borrowed[lender_ac]++;
+ fws->fifo_credit[lender_ac]--;
+ if (fws->fifo_credit[lender_ac] == 0)
+ fws->fifo_credit_map &= ~(1 << lender_ac);
+ brcmf_dbg(TRACE, "borrow credit from: %d\n", lender_ac);
+ return 0;
+ }
+ }
+ return -ENAVAIL;
+}
+
+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 (fifo != BRCMF_FWS_FIFO_AC_BE)
+ fws->borrow_defer_timestamp = jiffies +
+ BRCMF_FWS_BORROW_DEFER_PERIOD;
+
+ if (!(*credit)) {
+ /* Try to borrow a credit from other queue */
+ if (fifo == BRCMF_FWS_FIFO_AC_BE &&
+ brcmf_fws_borrow_credit(fws) == 0)
+ return 0;
+
+ brcmf_dbg(TRACE, "exit: ac=%d, credits depleted\n", fifo);
+ 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)
+{
+ 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 rollback;
+ }
+
+ rc = brcmf_bus_txdata(bus, skb);
+ if (rc < 0)
+ 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;
+
+rollback:
+ brcmf_fws_rollback_toq(fws, skb);
+ return rc;
+}
+
+int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
+{
+ struct brcmf_pub *drvr = ifp->drvr;
+ struct brcmf_fws_info *fws = drvr->fws;
+ struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
+ struct ethhdr *eh = (struct ethhdr *)(skb->data);
+ ulong flags;
+ 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(fws)) {
+ /* If the protocol uses a data header, apply it */
+ brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb);
+
+ /* Use bus module to send data frame */
+ return brcmf_bus_txdata(drvr->bus_if, skb);
+ }
+
+ /* set control buffer information */
+ skcb->if_flags = 0;
+ skcb->mac = brcmf_fws_find_mac_desc(fws, ifp, eh->h_dest);
+ skcb->state = BRCMF_FWS_SKBSTATE_NEW;
+ brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
+ if (!multicast)
+ fifo = brcmf_fws_prio2fifo[skb->priority];
+ brcmf_skb_if_flags_set_field(skb, FIFO, fifo);
+
+ brcmf_dbg(TRACE, "ea=%pM, multi=%d, fifo=%d\n", eh->h_dest,
+ multicast, fifo);
+
+ brcmf_fws_lock(drvr, flags);
+ if (skcb->mac->suppressed ||
+ brcmf_fws_mac_desc_closed(fws, skcb->mac, fifo) ||
+ brcmu_pktq_mlen(&skcb->mac->psq, 3 << (fifo * 2)) ||
+ (!multicast &&
+ brcmf_fws_consume_credit(fws, fifo, skb) < 0)) {
+ /* enqueue the packet in delayQ */
+ drvr->fws->fifo_delay_map |= 1 << fifo;
+ brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
+ } else {
+ if (brcmf_fws_commit_skb(fws, fifo, skb))
+ if (!multicast)
+ brcmf_skb_pick_up_credit(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;
+
+ brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
+ if (!entry)
+ return;
+
+ brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx);
+}
+
+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",
+ ifp->bssidx, ifp->mac_addr);
+ if (!ifp->ndev || !ifp->drvr->fw_signals)
+ return;
+
+ 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)
+{
+ struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
+ ulong flags;
+
+ brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
+ if (!entry)
+ return;
+
+ brcmf_fws_lock(ifp->drvr, flags);
+ ifp->fws_desc = NULL;
+ brcmf_fws_clear_mac_descriptor(entry);
+ brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
+ brcmf_fws_unlock(ifp->drvr, flags);
+}
+
+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 || brcmf_fws_commit_skb(fws, fifo, skb))
+ break;
+ if (brcmf_skbcb(skb)->if_flags &
+ BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)
+ credit++;
+ }
+ if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
+ (credit == fws->fifo_credit[fifo])) {
+ fws->fifo_credit[fifo] -= credit;
+ while (brcmf_fws_borrow_credit(fws) == 0) {
+ skb = brcmf_fws_deq(fws, fifo);
+ if (!skb) {
+ brcmf_fws_return_credits(fws, fifo, 1);
+ break;
+ }
+ if (brcmf_fws_commit_skb(fws, fifo, skb)) {
+ brcmf_fws_return_credits(fws, fifo, 1);
+ break;
+ }
+ }
+ } else {
+ fws->fifo_credit[fifo] -= credit;
+ }
+ }
+ brcmf_fws_unlock(fws->drvr, flags);
+}
+
+int brcmf_fws_init(struct brcmf_pub *drvr)
+{
+ u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
+ int rc;
+
+ if (!drvr->fw_signals)
+ return 0;
+
+ spin_lock_init(&drvr->fws_spinlock);
+
+ drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
+ if (!drvr->fws) {
+ rc = -ENOMEM;
+ goto fail;
+ }
+
+ /* set linkage back */
+ 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_FLAGS_CREDIT_STATUS_SIGNALS |
+ BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE;
+
+ rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
+ brcmf_fws_notify_credit_map);
+ if (rc < 0) {
+ brcmf_err("register credit map handler failed\n");
+ goto fail;
+ }
+
+ /* setting the iovar may fail if feature is unsupported
+ * so leave the rc as is so driver initialization can
+ * continue.
+ */
+ if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
+ brcmf_err("failed to set bdcv2 tlv signaling\n");
+ goto fail_event;
+ }
+
+ 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);
+
+ /* TODO: remove upon feature delivery */
+ brcmf_err("%s bdcv2 tlv signaling [%x]\n",
+ drvr->fw_signals ? "enabled" : "disabled", tlv);
+ return 0;
+
+fail_event:
+ brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
+fail:
+ brcmf_fws_deinit(drvr);
+ return rc;
+}
+
+void brcmf_fws_deinit(struct brcmf_pub *drvr)
+{
+ struct brcmf_fws_info *fws = drvr->fws;
+ ulong flags;
+
+ if (!fws)
+ return;
+
+ /* disable firmware signalling entirely
+ * to avoid using the workqueue.
+ */
+ drvr->fw_signals = false;
+
+ if (drvr->fws->fws_wq)
+ destroy_workqueue(drvr->fws->fws_wq);
+
+ /* cleanup */
+ brcmf_fws_lock(drvr, flags);
+ brcmf_fws_cleanup(fws, -1);
+ drvr->fws = NULL;
+ brcmf_fws_unlock(drvr, flags);
+
+ /* free top structure */
+ kfree(fws);
+}
+
+bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
+{
+ if (!fws)
+ return false;
+
+ brcmf_dbg(TRACE, "enter: mode=%d\n", fws->fcmode);
+ return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
+}
+
+void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
+{
+ ulong flags;
+
+ brcmf_fws_lock(fws->drvr, flags);
+ brcmf_fws_txstatus_process(fws, BRCMF_FWS_TXSTATUS_FW_TOSSED,
+ 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);
+}