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/*
* 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 "fwsignal.h"
#include <threads.h>
#include "bcdc.h"
#include "brcmu_utils.h"
#include "brcmu_wifi.h"
#include "bus.h"
#include "cfg80211.h"
#include "common.h"
#include "core.h"
#include "debug.h"
#include "fweh.h"
#include "fwil.h"
#include "fwil_types.h"
#include "linuxisms.h"
#include "netbuf.h"
#include "p2p.h"
#include "proto.h"
#include "workqueue.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
// clang-format off
/* AMPDU rx reordering definitions */
#define BRCMF_RXREORDER_FLOWID_OFFSET 0
#define BRCMF_RXREORDER_MAXIDX_OFFSET 2
#define BRCMF_RXREORDER_FLAGS_OFFSET 4
#define BRCMF_RXREORDER_CURIDX_OFFSET 6
#define BRCMF_RXREORDER_EXPIDX_OFFSET 8
#define BRCMF_RXREORDER_DEL_FLOW 0x01
#define BRCMF_RXREORDER_FLUSH_ALL 0x02
#define BRCMF_RXREORDER_CURIDX_VALID 0x04
#define BRCMF_RXREORDER_EXPIDX_VALID 0x08
#define BRCMF_RXREORDER_NEW_HOLE 0x10
// clang-format-on
#if !defined(NDEBUG)
/*
* brcmf_fws_tlv_names - array of tlv names.
*/
#define BRCMF_FWS_TLV_DEF(name, id, len) {BRCMF_FWS_TYPE_##name, #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 < (int)countof(brcmf_fws_tlv_names); i++)
if (brcmf_fws_tlv_names[i].id == id) {
return brcmf_fws_tlv_names[i].name;
}
return "INVALID";
}
#else /* !defined(NDEBUG) */
static const char* brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) {
return "NODEBUG";
}
#endif /* !defined(NDEBUG) */
/*
* The PKTTAG tlv has additional bytes when firmware-signalling
* mode has REUSESEQ flag set.
*/
#define BRCMF_FWS_TYPE_SEQ_LEN 2
/*
* 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 ((BRCMF_FWS_FIFO_COUNT + 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_should_schedule {BRCMF_FWS_NOSCHEDULE, BRCMF_FWS_SCHEDULE};
#define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */
#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) \
((x) = ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
(((val)&1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
#define BRCMF_FWS_MODE_GET_REUSESEQ(x) (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
/**
* enum brcmf_fws_netbuf_state - indicates processing state of netbuf.
*
* @BRCMF_FWS_NETBUFSTATE_NEW: brcmf_netbuf is newly arrived in the driver.
* @BRCMF_FWS_NETBUFSTATE_DELAYED: brcmf_netbuf had to wait on queue.
* @BRCMF_FWS_NETBUFSTATE_SUPPRESSED: brcmf_netbuf has been suppressed by firmware.
* @BRCMF_FWS_NETBUFSTATE_TIM: allocated for TIM update info.
*/
enum brcmf_fws_netbuf_state {
BRCMF_FWS_NETBUFSTATE_NEW,
BRCMF_FWS_NETBUFSTATE_DELAYED,
BRCMF_FWS_NETBUFSTATE_SUPPRESSED,
BRCMF_FWS_NETBUFSTATE_TIM
};
/**
* struct brcmf_netbuf_workspace - control buffer associated with netbuf.
*
* @bus_flags: 2 bytes reserved for bus specific parameters
* @if_flags: holds interface index and packet related flags.
* @htod: host to device packet identifier (used in PKTTAG tlv).
* @htod_seq: this 16-bit is original seq number for every suppress packet.
* @state: transmit state of the packet.
* @mac: descriptor related to destination for this packet.
*
* This information is stored in control buffer struct brcmf_netbuf.workspace, which
* provides 48 bytes of storage so this structure should not exceed that.
*/
struct brcmf_netbuf_workspace {
uint16_t bus_flags;
uint16_t if_flags;
uint32_t htod;
uint16_t htod_seq;
enum brcmf_fws_netbuf_state state;
struct brcmf_fws_mac_descriptor* mac;
zx_status_t mac_status;
};
static_assert(sizeof(struct brcmf_netbuf_workspace) <=
sizeof(((struct brcmf_netbuf*)0)->workspace),
"Struct brcmf_netbuf_workspace must be <= 48 bytes");
/*
* macro casting netbuf control buffer to struct brcmf_netbuf_workspace.
*/
#define brcmf_workspace(netbuf) ((struct brcmf_netbuf_workspace*)((netbuf)->workspace))
// clang-format-off
/*
* brcmf_netbuf 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 used requested credit
* b[7] - interface in AP mode.
* b[3:0] - interface index.
*/
#define BRCMF_NETBUF_IF_FLAGS_REQUESTED_MASK 0x0800
#define BRCMF_NETBUF_IF_FLAGS_REQUESTED_SHIFT 11
#define BRCMF_NETBUF_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
#define BRCMF_NETBUF_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
#define BRCMF_NETBUF_IF_FLAGS_TRANSMIT_MASK 0x0200
#define BRCMF_NETBUF_IF_FLAGS_TRANSMIT_SHIFT 9
#define BRCMF_NETBUF_IF_FLAGS_REQ_CREDIT_MASK 0x0100
#define BRCMF_NETBUF_IF_FLAGS_REQ_CREDIT_SHIFT 8
#define BRCMF_NETBUF_IF_FLAGS_IF_AP_MASK 0x0080
#define BRCMF_NETBUF_IF_FLAGS_IF_AP_SHIFT 7
#define BRCMF_NETBUF_IF_FLAGS_INDEX_MASK 0x000f
#define BRCMF_NETBUF_IF_FLAGS_INDEX_SHIFT 0
#define brcmf_netbuf_if_flags_set_field(netbuf, field, value) \
brcmu_maskset16(&(brcmf_workspace(netbuf)->if_flags), BRCMF_NETBUF_IF_FLAGS_##field##_MASK, \
BRCMF_NETBUF_IF_FLAGS_##field##_SHIFT, (value))
#define brcmf_netbuf_if_flags_get_field(netbuf, field) \
brcmu_maskget16(brcmf_workspace(netbuf)->if_flags, BRCMF_NETBUF_IF_FLAGS_##field##_MASK, \
BRCMF_NETBUF_IF_FLAGS_##field##_SHIFT)
/*
* brcmf_netbuf 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_NETBUF_HTOD_TAG_GENERATION_MASK 0x80000000
#define BRCMF_NETBUF_HTOD_TAG_GENERATION_SHIFT 31
#define BRCMF_NETBUF_HTOD_TAG_FLAGS_MASK 0x78000000
#define BRCMF_NETBUF_HTOD_TAG_FLAGS_SHIFT 27
#define BRCMF_NETBUF_HTOD_TAG_FIFO_MASK 0x07000000
#define BRCMF_NETBUF_HTOD_TAG_FIFO_SHIFT 24
#define BRCMF_NETBUF_HTOD_TAG_HSLOT_MASK 0x00ffff00
#define BRCMF_NETBUF_HTOD_TAG_HSLOT_SHIFT 8
#define BRCMF_NETBUF_HTOD_TAG_FREERUN_MASK 0x000000ff
#define BRCMF_NETBUF_HTOD_TAG_FREERUN_SHIFT 0
#define brcmf_netbuf_htod_tag_set_field(netbuf, field, value) \
brcmu_maskset32(&(brcmf_workspace(netbuf)->htod), BRCMF_NETBUF_HTOD_TAG_##field##_MASK, \
BRCMF_NETBUF_HTOD_TAG_##field##_SHIFT, (value))
#define brcmf_netbuf_htod_tag_get_field(netbuf, field) \
brcmu_maskget32(brcmf_workspace(netbuf)->htod, BRCMF_NETBUF_HTOD_TAG_##field##_MASK, \
BRCMF_NETBUF_HTOD_TAG_##field##_SHIFT)
#define BRCMF_NETBUF_HTOD_SEQ_FROMFW_MASK 0x2000
#define BRCMF_NETBUF_HTOD_SEQ_FROMFW_SHIFT 13
#define BRCMF_NETBUF_HTOD_SEQ_FROMDRV_MASK 0x1000
#define BRCMF_NETBUF_HTOD_SEQ_FROMDRV_SHIFT 12
#define BRCMF_NETBUF_HTOD_SEQ_NR_MASK 0x0fff
#define BRCMF_NETBUF_HTOD_SEQ_NR_SHIFT 0
#define brcmf_netbuf_htod_seq_set_field(netbuf, field, value) \
brcmu_maskset16(&(brcmf_workspace(netbuf)->htod_seq), BRCMF_NETBUF_HTOD_SEQ_##field##_MASK, \
BRCMF_NETBUF_HTOD_SEQ_##field##_SHIFT, (value))
#define brcmf_netbuf_htod_seq_get_field(netbuf, field) \
brcmu_maskget16(brcmf_workspace(netbuf)->htod_seq, BRCMF_NETBUF_HTOD_SEQ_##field##_MASK, \
BRCMF_NETBUF_HTOD_SEQ_##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_FREERUN_MASK 0x000000FF
#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0
// clang-format on
#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 msec */
#define BRCMF_FWS_BORROW_DEFER_PERIOD_MSEC (100)
/**
* enum brcmf_fws_fifo - fifo indices used by dongle firmware.
*
* @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
* @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_FIRST,
BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
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.
* @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
* host 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,
BRCMF_FWS_TXSTATUS_HOST_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 {
char name[16];
uint8_t occupied;
uint8_t mac_handle;
uint8_t interface_id;
uint8_t state;
bool suppressed;
uint8_t generation;
uint8_t ac_bitmap;
uint8_t requested_credit;
uint8_t requested_packet;
uint8_t ea[ETH_ALEN];
uint8_t seq[BRCMF_FWS_FIFO_COUNT];
struct pktq psq;
int transit_count;
int suppr_transit_count;
bool send_tim_signal;
uint8_t traffic_pending_bmp;
uint8_t 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.
* @pkt: packet itself.
*/
struct brcmf_fws_hanger_item {
enum brcmf_fws_hanger_item_state state;
struct brcmf_netbuf* 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 {
uint32_t pushed;
uint32_t popped;
uint32_t failed_to_push;
uint32_t failed_to_pop;
uint32_t failed_slotfind;
uint32_t 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_stats {
uint32_t tlv_parse_failed;
uint32_t tlv_invalid_type;
uint32_t header_only_pkt;
uint32_t header_pulls;
uint32_t pkt2bus;
uint32_t send_pkts[5];
uint32_t requested_sent[5];
uint32_t generic_error;
uint32_t mac_update_failed;
uint32_t mac_ps_update_failed;
uint32_t if_update_failed;
uint32_t packet_request_failed;
uint32_t credit_request_failed;
uint32_t rollback_success;
uint32_t rollback_failed;
uint32_t delayq_full_error;
uint32_t supprq_full_error;
uint32_t txs_indicate;
uint32_t txs_discard;
uint32_t txs_supp_core;
uint32_t txs_supp_ps;
uint32_t txs_tossed;
uint32_t txs_host_tossed;
uint32_t bus_flow_block;
uint32_t fws_flow_block;
};
struct brcmf_fws_info {
struct brcmf_pub* drvr;
// spinlock_t spinlock;
struct brcmf_fws_stats stats;
struct brcmf_fws_hanger hanger;
enum brcmf_fws_fcmode fcmode;
bool fw_signals;
bool bcmc_credit_check;
struct brcmf_fws_macdesc_table desc;
struct workqueue_struct* fws_wq;
struct work_struct fws_dequeue_work;
uint32_t 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];
uint32_t fifo_credit_map;
uint32_t fifo_delay_map;
zx_time_t borrow_defer_timestamp;
bool bus_flow_blocked;
bool creditmap_received;
uint8_t mode;
bool avoid_queueing;
};
/*
* 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};
#define BRCMF_FWS_TLV_DEF(name, id, len) \
case BRCMF_FWS_TYPE_##name: \
*len_out = len; \
return ZX_OK;
/**
* brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
*
* @fws: firmware-signalling information.
* @id: identifier of the TLV.
* @len_out: set to the specified length for the given TLV if return is ZX_OK; otherwise 0.
*
* Return: ZX_OK if TLV is found; otherwise error.
*/
static zx_status_t brcmf_fws_get_tlv_len(struct brcmf_fws_info* fws, enum brcmf_fws_tlv_type id,
int* len_out) {
if (!len_out) {
return ZX_ERR_INVALID_ARGS;
}
switch (id) {
BRCMF_FWS_TLV_DEFLIST
default:
fws->stats.tlv_invalid_type++;
break;
}
*len_out = 0;
return ZX_ERR_INVALID_ARGS;
}
#undef BRCMF_FWS_TLV_DEF
static void brcmf_fws_lock(struct brcmf_fws_info* fws) { // __TA_ACQUIRE(&fws->spinlock) {
// spin_lock_irqsave(&fws->spinlock, fws->flags);
fws->drvr->irq_callback_lock.lock();
}
static void brcmf_fws_unlock(struct brcmf_fws_info* fws) { // __TA_RELEASE(&fws->spinlock) {
// spin_unlock_irqrestore(&fws->spinlock, fws->flags);
fws->drvr->irq_callback_lock.unlock();
}
static bool brcmf_fws_ifidx_match(struct brcmf_netbuf* netbuf, void* arg) {
uint32_t ifidx = brcmf_netbuf_if_flags_get_field(netbuf, INDEX);
return ifidx == *(uint32_t*)arg;
}
static void brcmf_fws_psq_flush(struct brcmf_fws_info* fws, struct pktq* q, int ifidx) {
bool (*matchfn)(struct brcmf_netbuf*, void*) = NULL;
struct brcmf_netbuf* netbuf;
int prec;
if (ifidx != -1) {
matchfn = brcmf_fws_ifidx_match;
}
for (prec = 0; prec < q->num_prec; prec++) {
netbuf = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
while (netbuf) {
brcmu_pkt_buf_free_netbuf(netbuf);
netbuf = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
}
}
}
static void brcmf_fws_hanger_init(struct brcmf_fws_hanger* hanger) {
int i;
memset(hanger, 0, sizeof(*hanger));
for (i = 0; i < (int)countof(hanger->items); i++) {
hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
}
}
static uint32_t brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger* h) {
uint32_t i;
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:
return i;
}
static zx_status_t brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger* h, struct brcmf_netbuf* pkt,
uint32_t slot_id) {
if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) {
return ZX_ERR_OUT_OF_RANGE;
}
if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
BRCMF_ERR("slot is not free\n");
h->failed_to_push++;
return ZX_ERR_BAD_STATE;
}
h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
h->items[slot_id].pkt = pkt;
h->pushed++;
return ZX_OK;
}
static inline zx_status_t brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger* h, uint32_t slot_id,
struct brcmf_netbuf** pktout, bool remove_item) {
if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) {
return ZX_ERR_OUT_OF_RANGE;
}
if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
BRCMF_ERR("entry not in use\n");
h->failed_to_pop++;
return ZX_ERR_BAD_STATE;
}
*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->popped++;
}
return ZX_OK;
}
static zx_status_t brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger* h, uint32_t slot_id) {
if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) {
return ZX_ERR_OUT_OF_RANGE;
}
if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
BRCMF_ERR("entry not in use\n");
return ZX_ERR_BAD_STATE;
}
h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
return ZX_OK;
}
static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info* fws,
bool (*fn)(struct brcmf_netbuf*, void*), int ifidx) {
struct brcmf_fws_hanger* h = &fws->hanger;
struct brcmf_netbuf* netbuf;
int i;
enum brcmf_fws_hanger_item_state s;
for (i = 0; i < (int)countof(h->items); i++) {
s = h->items[i].state;
if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
netbuf = h->items[i].pkt;
if (fn == NULL || fn(netbuf, &ifidx)) {
/* suppress packets freed from psq */
if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) {
brcmu_pkt_buf_free_netbuf(netbuf);
}
h->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
}
}
}
}
static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info* fws,
struct brcmf_fws_mac_descriptor* desc) {
if (desc == &fws->desc.other) {
strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
} else if (desc->mac_handle)
snprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", desc->mac_handle, desc->interface_id);
else {
snprintf(desc->name, sizeof(desc->name), "MACIF:%d", desc->interface_id);
}
}
static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor* desc, uint8_t* addr,
uint8_t 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;
desc->requested_packet = 0;
/* depending on use may need ifp->bsscfgidx 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_macdesc_deinit(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;
desc->requested_packet = 0;
}
static zx_status_t brcmf_fws_macdesc_lookup(struct brcmf_fws_info* fws, uint8_t* ea,
struct brcmf_fws_mac_descriptor** macdesc_out) {
struct brcmf_fws_mac_descriptor* entry;
int i;
if (macdesc_out) {
*macdesc_out = NULL;
}
if (ea == NULL) {
return ZX_ERR_INVALID_ARGS;
}
entry = &fws->desc.nodes[0];
for (i = 0; i < (int)countof(fws->desc.nodes); i++) {
if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) {
if (macdesc_out) {
*macdesc_out = entry;
}
return ZX_OK;
}
entry++;
}
return ZX_ERR_NOT_FOUND;
}
static zx_status_t brcmf_fws_macdesc_find(struct brcmf_fws_info* fws, struct brcmf_if* ifp,
uint8_t* da,
struct brcmf_fws_mac_descriptor** macdesc_out) {
*macdesc_out = &fws->desc.other; // TODO(cphoenix): Isn't this overwritten?
bool multicast;
zx_status_t ret;
multicast = address_is_multicast(da);
/* Multicast destination, STA and P2P clients get the interface entry.
* STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
* have their own entry.
*/
if (multicast && ifp->fws_desc) {
*macdesc_out = ifp->fws_desc;
ret = ZX_OK;
goto done;
}
ret = brcmf_fws_macdesc_lookup(fws, da, macdesc_out);
if (ret != ZX_OK) {
*macdesc_out = ifp->fws_desc;
// TODO(cphoenix): Check logic and expectations here, e.g. is fws_desc non-NULL?
ret = ZX_OK;
}
done:
return ret;
}
static bool brcmf_fws_macdesc_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_macdesc_cleanup(struct brcmf_fws_info* fws,
struct brcmf_fws_mac_descriptor* entry, int ifidx) {
if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
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 brcmf_netbuf*, void*), int ifidx) {
struct brcmf_fws_hanger_item* hi;
struct pktq* txq;
struct brcmf_netbuf* netbuf;
int prec;
uint32_t hslot;
zx_status_t err;
err = brcmf_bus_gettxq(fws->drvr->bus_if, &txq);
if (err != ZX_OK) {
BRCMF_DBG(TRACE, "no txq to clean up\n");
return;
}
for (prec = 0; prec < txq->num_prec; prec++) {
netbuf = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
while (netbuf) {
hslot = brcmf_netbuf_htod_tag_get_field(netbuf, HSLOT);
hi = &fws->hanger.items[hslot];
WARN_ON(netbuf != hi->pkt);
hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
brcmu_pkt_buf_free_netbuf(netbuf);
netbuf = 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 brcmf_netbuf*, void*) = NULL;
if (fws == NULL) {
return;
}
if (ifidx != -1) {
matchfn = brcmf_fws_ifidx_match;
}
/* cleanup individual nodes */
table = &fws->desc.nodes[0];
for (i = 0; i < (int)countof(fws->desc.nodes); i++) {
brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
}
brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
}
static uint8_t brcmf_fws_hdrpush(struct brcmf_fws_info* fws, struct brcmf_netbuf* netbuf) {
struct brcmf_fws_mac_descriptor* entry = brcmf_workspace(netbuf)->mac;
uint8_t* wlh;
uint16_t data_offset = 0;
uint8_t fillers;
uint32_t pkttag = brcmf_workspace(netbuf)->htod;
uint16_t pktseq = brcmf_workspace(netbuf)->htod_seq;
BRCMF_DBG(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n", entry->name,
brcmf_netbuf_if_flags_get_field(netbuf, INDEX), (pkttag) >> 8 & 0xffff,
brcmf_workspace(netbuf)->htod, brcmf_workspace(netbuf)->htod_seq);
if (entry->send_tim_signal) {
data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
}
if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
data_offset += BRCMF_FWS_TYPE_SEQ_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;
brcmf_netbuf_grow_head(netbuf, data_offset);
wlh = netbuf->data;
wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
memcpy(&wlh[2], &pkttag, sizeof(pkttag));
if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq, sizeof(pktseq));
}
wlh += wlh[1] + 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;
BRCMF_DBG(TRACE, "adding TIM info: handle %d bmp 0x%X\n", entry->mac_handle,
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);
}
return (uint8_t)(data_offset >> 2);
}
static bool brcmf_fws_tim_update(struct brcmf_fws_info* fws, struct brcmf_fws_mac_descriptor* entry,
int fifo, bool send_immediately) {
struct brcmf_netbuf* netbuf;
struct brcmf_netbuf_workspace* workspace;
zx_status_t err;
uint32_t len;
uint8_t data_offset;
int ifidx;
/* check delayedQ and suppressQ in one call using bitmap */
if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) {
entry->traffic_pending_bmp &= ~NBITVAL(fifo);
} else {
entry->traffic_pending_bmp |= NBITVAL(fifo);
}
entry->send_tim_signal = false;
if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) {
entry->send_tim_signal = true;
}
if (send_immediately && entry->send_tim_signal && entry->state == BRCMF_FWS_STATE_CLOSE) {
/* create a dummy packet and sent that. The traffic */
/* bitmap info will automatically be attached to that packet */
len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + BRCMF_FWS_TYPE_SEQ_LEN +
BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 4 + fws->drvr->hdrlen;
netbuf = brcmu_pkt_buf_get_netbuf(len);
if (netbuf == NULL) {
return false;
}
brcmf_netbuf_shrink_head(netbuf, len);
workspace = brcmf_workspace(netbuf);
workspace->mac = entry;
workspace->mac_status = ZX_OK;
workspace->state = BRCMF_FWS_NETBUFSTATE_TIM;
workspace->htod = 0;
workspace->htod_seq = 0;
data_offset = brcmf_fws_hdrpush(fws, netbuf);
ifidx = brcmf_netbuf_if_flags_get_field(netbuf, INDEX);
brcmf_fws_unlock(fws);
err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, netbuf);
brcmf_fws_lock(fws);
if (err != ZX_OK) {
brcmu_pkt_buf_free_netbuf(netbuf);
}
return true;
}
return false;
}
static void brcmf_fws_flow_control_check(struct brcmf_fws_info* fws, struct pktq* pq,
uint8_t if_id) {
struct brcmf_if* ifp = brcmf_get_ifp(fws->drvr, if_id);
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) {
fws->stats.fws_flow_block++;
brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
}
return;
}
static zx_status_t brcmf_fws_rssi_indicate(struct brcmf_if* ifp, int8_t rssi) {
BRCMF_DBG(CTL, "rssi %d\n", rssi);
// Note that using an unsigned int8 to set the value of index ensures that -128
// is handled as well.
if (ifp->ndev && (rssi <= 0)) {
uint8_t idx = -rssi;
ifp->ndev->stats.rssi_buckets[idx]++;
}
return ZX_OK;
}
static int brcmf_fws_macdesc_indicate(struct brcmf_fws_info* fws, uint8_t type, uint8_t* data) {
struct brcmf_fws_mac_descriptor* entry;
struct brcmf_fws_mac_descriptor* existing;
uint8_t mac_handle;
uint8_t ifidx;
uint8_t* addr;
zx_status_t ret;
mac_handle = *data++;
ifidx = *data++;
addr = data;
entry = &fws->desc.nodes[mac_handle & 0x1F];
if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
if (entry->occupied) {
BRCMF_DBG(TRACE, "deleting %s mac %pM\n", entry->name, addr);
brcmf_fws_lock(fws);
brcmf_fws_macdesc_cleanup(fws, entry, -1);
brcmf_fws_macdesc_deinit(entry);
brcmf_fws_unlock(fws);
} else {
fws->stats.mac_update_failed++;
}
return ZX_OK;
}
ret = brcmf_fws_macdesc_lookup(fws, addr, &existing);
if (ret != ZX_OK) {
if (!entry->occupied) {
brcmf_fws_lock(fws);
entry->mac_handle = mac_handle;
brcmf_fws_macdesc_init(entry, addr, ifidx);
brcmf_fws_macdesc_set_name(fws, entry);
brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, BRCMF_FWS_PSQ_LEN);
brcmf_fws_unlock(fws);
BRCMF_DBG(TRACE, "add %s mac %pM\n", entry->name, addr);
} else {
fws->stats.mac_update_failed++;
}
} else {
if (entry != existing) {
BRCMF_DBG(TRACE, "copy mac %s\n", existing->name);
brcmf_fws_lock(fws);
memcpy(entry, existing, offsetof(struct brcmf_fws_mac_descriptor, psq));
entry->mac_handle = mac_handle;
brcmf_fws_macdesc_deinit(existing);
brcmf_fws_macdesc_set_name(fws, entry);
brcmf_fws_unlock(fws);
BRCMF_DBG(TRACE, "relocate %s mac %pM\n", entry->name, addr);
} else {
BRCMF_DBG(TRACE, "use existing\n");
WARN_ON(entry->mac_handle != mac_handle);
/* TODO: what should we do here: continue, reinit, .. */
}
}
return ZX_OK;
}
static enum brcmf_fws_should_schedule brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info* fws,
uint8_t type,
uint8_t* data) {
struct brcmf_fws_mac_descriptor* entry;
uint8_t mac_handle;
int ret;
mac_handle = data[0];
entry = &fws->desc.nodes[mac_handle & 0x1F];
if (!entry->occupied) {
fws->stats.mac_ps_update_failed++;
BRCMF_ERR("Unoccupied entry\n");
return BRCMF_FWS_NOSCHEDULE;
}
brcmf_fws_lock(fws);
/* a state update should wipe old credits */
entry->requested_credit = 0;
entry->requested_packet = 0;
if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
entry->state = BRCMF_FWS_STATE_OPEN;
ret = BRCMF_FWS_SCHEDULE;
} else {
entry->state = BRCMF_FWS_STATE_CLOSE;
brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
ret = BRCMF_FWS_NOSCHEDULE;
}
brcmf_fws_unlock(fws);
return static_cast<brcmf_fws_should_schedule>(ret);
}
static enum brcmf_fws_should_schedule brcmf_fws_interface_state_indicate(struct brcmf_fws_info* fws,
uint8_t type,
uint8_t* data) {
struct brcmf_fws_mac_descriptor* entry;
uint8_t ifidx;
enum brcmf_fws_should_schedule ret;
ifidx = data[0];
if (ifidx >= BRCMF_MAX_IFS) {
BRCMF_ERR("ifidx %d bigger than BRCMF_MAX_IFS\n", ifidx);
ret = BRCMF_FWS_NOSCHEDULE;
goto fail;
}
entry = &fws->desc.iface[ifidx];
if (!entry->occupied) {
BRCMF_ERR("Entry %d unoccupied\n", ifidx);
ret = BRCMF_FWS_NOSCHEDULE;
goto fail;
}
BRCMF_DBG(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(static_cast<brcmf_fws_tlv_type>(type)),
type, entry->name);
brcmf_fws_lock(fws);
switch (type) {
case BRCMF_FWS_TYPE_INTERFACE_OPEN:
entry->state = BRCMF_FWS_STATE_OPEN;
ret = BRCMF_FWS_SCHEDULE;
break;
case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
entry->state = BRCMF_FWS_STATE_CLOSE;
ret = BRCMF_FWS_NOSCHEDULE;
break;
default:
BRCMF_ERR("Invalid type %d\n", type);
ret = BRCMF_FWS_NOSCHEDULE;
brcmf_fws_unlock(fws);
goto fail;
}
brcmf_fws_unlock(fws);
return ret;
fail:
fws->stats.if_update_failed++;
return ret;
}
static enum brcmf_fws_should_schedule brcmf_fws_request_indicate(struct brcmf_fws_info* fws,
uint8_t type, uint8_t* 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++;
}
BRCMF_ERR("Unoccupied entry %d\n", data[1] & 0x1F);
return BRCMF_FWS_NOSCHEDULE;
}
BRCMF_DBG(TRACE, "%s (%d): %s cnt %d bmp %d\n",
brcmf_fws_get_tlv_name(static_cast<brcmf_fws_tlv_type>(type)), type, entry->name,
data[0], data[2]);
brcmf_fws_lock(fws);
if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) {
entry->requested_credit = data[0];
} else {
entry->requested_packet = data[0];
}
entry->ac_bitmap = data[2];
brcmf_fws_unlock(fws);
return BRCMF_FWS_SCHEDULE;
}
static void brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor* entry,
struct brcmf_netbuf* netbuf) {
if (entry->requested_credit > 0) {
entry->requested_credit--;
brcmf_netbuf_if_flags_set_field(netbuf, REQUESTED, 1);
brcmf_netbuf_if_flags_set_field(netbuf, REQ_CREDIT, 1);
if (entry->state != BRCMF_FWS_STATE_CLOSE) {
BRCMF_ERR("requested credit set while mac not closed!\n");
}
} else if (entry->requested_packet > 0) {
entry->requested_packet--;
brcmf_netbuf_if_flags_set_field(netbuf, REQUESTED, 1);
brcmf_netbuf_if_flags_set_field(netbuf, REQ_CREDIT, 0);
if (entry->state != BRCMF_FWS_STATE_CLOSE) {
BRCMF_ERR("requested packet set while mac not closed!\n");
}
} else {
brcmf_netbuf_if_flags_set_field(netbuf, REQUESTED, 0);
brcmf_netbuf_if_flags_set_field(netbuf, REQ_CREDIT, 0);
}
}
static void brcmf_fws_macdesc_return_req_credit(struct brcmf_netbuf* netbuf) {
struct brcmf_fws_mac_descriptor* entry = brcmf_workspace(netbuf)->mac;
if ((brcmf_netbuf_if_flags_get_field(netbuf, REQ_CREDIT)) &&
(entry->state == BRCMF_FWS_STATE_CLOSE)) {
entry->requested_credit++;
}
}
static void brcmf_fws_return_credits(struct brcmf_fws_info* fws, uint8_t fifo, uint8_t credits) {
int lender_ac;
int* borrowed;
int* fifo_credit;
if (!credits) {
return;
}
fws->fifo_credit_map |= 1 << fifo;
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[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) ||
(!brcmf_fws_fc_active(fws) && fws->fifo_delay_map)) {
workqueue_schedule(fws->fws_wq, &fws->fws_dequeue_work);
}
}
static zx_status_t brcmf_fws_enq(struct brcmf_fws_info* fws, enum brcmf_fws_netbuf_state state,
int fifo, struct brcmf_netbuf* p) {
int prec = 2 * fifo;
uint32_t* qfull_stat = &fws->stats.delayq_full_error;
struct brcmf_fws_mac_descriptor* entry;
struct pktq* pq;
struct brcmf_netbuf_list* queue;
struct brcmf_netbuf* p_head;
struct brcmf_netbuf* p_tail;
uint32_t fr_new;
uint32_t fr_compare;
entry = brcmf_workspace(p)->mac;
if (entry == NULL) {
BRCMF_ERR("no mac descriptor found for netbuf %p\n", p);
return ZX_ERR_NOT_FOUND;
}
BRCMF_DBG(DATA, "enter: fifo %d netbuf %p\n", fifo, p);
if (state == BRCMF_FWS_NETBUFSTATE_SUPPRESSED) {
prec += 1;
qfull_stat = &fws->stats.supprq_full_error;
/* Fix out of order delivery of frames. Dont assume frame */
/* can be inserted at the end, but look for correct position */
pq = &entry->psq;
if (pktq_full(pq) || pktq_pfull(pq, prec)) {
*qfull_stat += 1;
return ZX_ERR_NO_RESOURCES;
}
queue = &pq->q[prec].netbuf_list;
p_head = brcmf_netbuf_list_peek_head(queue);
p_tail = brcmf_netbuf_list_peek_tail(queue);
fr_new = brcmf_netbuf_htod_tag_get_field(p, FREERUN);
while (p_head != p_tail) {
fr_compare = brcmf_netbuf_htod_tag_get_field(p_tail, FREERUN);
/* be sure to handle wrap of 256 */
if (((fr_new > fr_compare) && ((fr_new - fr_compare) < 128)) ||
((fr_new < fr_compare) && ((fr_compare - fr_new) > 128))) {
break;
}
p_tail = brcmf_netbuf_list_prev(queue, p_tail);
}
/* Position found. Determine what to do */
if (p_tail == NULL) {
/* empty list */
brcmf_netbuf_list_add_tail(queue, p);
} else {
fr_compare = brcmf_netbuf_htod_tag_get_field(p_tail, FREERUN);
if (((fr_new > fr_compare) && ((fr_new - fr_compare) < 128)) ||
((fr_new < fr_compare) && ((fr_compare - fr_new) > 128))) {
/* After tail */
brcmf_netbuf_list_add_after(queue, p_tail, p);
} else {
/* Before tail */
brcmf_netbuf_list_add_after(queue, brcmf_netbuf_list_prev(queue, p_tail), p);
}
}
/* Complete the counters and statistics */
pq->len++;
if (pq->hi_prec < prec) {
pq->hi_prec = (uint8_t)prec;
}
} else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
*qfull_stat += 1;
return ZX_ERR_NO_RESOURCES;
}
/* increment total enqueued packet count */
fws->fifo_delay_map |= 1 << fifo;
fws->fifo_enqpkt[fifo]++;
/* update the brcmf_netbuf state */
brcmf_workspace(p)->state = state;
/*
* A packet has been pushed so update traffic
* availability bitmap, if applicable
*/
brcmf_fws_tim_update(fws, entry, fifo, true);
brcmf_fws_flow_control_check(fws, &entry->psq, brcmf_netbuf_if_flags_get_field(p, INDEX));
return ZX_OK;
}
static struct brcmf_netbuf* brcmf_fws_deq(struct brcmf_fws_info* fws, int fifo) {
struct brcmf_fws_mac_descriptor* table;
struct brcmf_fws_mac_descriptor* entry;
struct brcmf_netbuf* p;
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_macdesc_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) {
continue;
}
entry->suppressed = false;
p = brcmu_pktq_mdeq(&entry->psq, 1 << (fifo * 2), &prec_out);
}
}
if (p == NULL) {
continue;
}
brcmf_fws_macdesc_use_req_credit(entry, p);
/* 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_netbuf_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, false);
/*
* 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(DATA, "exit: fifo %d netbuf %p\n", fifo, p);
return p;
}
static zx_status_t brcmf_fws_txstatus_suppressed(struct brcmf_fws_info* fws, int fifo,
struct brcmf_netbuf* netbuf, uint32_t genbit,
uint16_t seq) {
struct brcmf_fws_mac_descriptor* entry = brcmf_workspace(netbuf)->mac;
uint32_t hslot;
zx_status_t ret;
hslot = brcmf_netbuf_htod_tag_get_field(netbuf, HSLOT);
/* this packet was suppressed */
if (!entry->suppressed) {
entry->suppressed = true;
entry->suppr_transit_count = entry->transit_count;
BRCMF_DBG(DATA, "suppress %s: transit %d\n", entry->name, entry->transit_count);
}
entry->generation = genbit;
brcmf_netbuf_htod_tag_set_field(netbuf, GENERATION, genbit);
brcmf_workspace(netbuf)->htod_seq = seq;
if (brcmf_netbuf_htod_seq_get_field(netbuf, FROMFW)) {
brcmf_netbuf_htod_seq_set_field(netbuf, FROMDRV, 1);
brcmf_netbuf_htod_seq_set_field(netbuf, FROMFW, 0);
} else {
brcmf_netbuf_htod_seq_set_field(netbuf, FROMDRV, 0);
}
ret = brcmf_fws_enq(fws, BRCMF_FWS_NETBUFSTATE_SUPPRESSED, fifo, netbuf);
if (ret != ZX_OK) {
/* suppress q is full drop this packet */
brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &netbuf, true);
} else {
/* Mark suppressed to avoid a double free during wlfc cleanup */
brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
}
return ret;
}
static zx_status_t brcmf_fws_txs_process(struct brcmf_fws_info* fws, uint8_t flags, uint32_t hslot,
uint32_t genbit, uint16_t seq) {
uint32_t fifo;
zx_status_t ret;
bool remove_from_hanger = true;
struct brcmf_netbuf* netbuf;
struct brcmf_netbuf_workspace* workspace;
struct brcmf_fws_mac_descriptor* entry = NULL;
struct brcmf_if* ifp;
BRCMF_DBG(DATA, "flags %d\n", flags);
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 if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) {
fws->stats.txs_host_tossed++;
} else {
BRCMF_ERR("unexpected txstatus\n");
}
ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &netbuf, remove_from_hanger);
if (ret != ZX_OK) {
BRCMF_ERR("no packet in hanger slot: hslot=%d\n", hslot);
return ret;
}
workspace = brcmf_workspace(netbuf);
// TODO(cphoenix): Used to be WARN_ON(!entry) which wouldn't have picked up entry==error
// anyway. Revisit logic here.
if (workspace->mac_status == ZX_OK) {
entry = workspace->mac;
} else {
WARN_ON(true /*bad entry*/);
brcmu_pkt_buf_free_netbuf(netbuf);
return ZX_ERR_INTERNAL;
}
entry->transit_count--;
if (entry->suppressed && entry->suppr_transit_count) {
entry->suppr_transit_count--;
}
BRCMF_DBG(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags, workspace->htod, seq);
/* pick up the implicit credit from this packet */
fifo = brcmf_netbuf_htod_tag_get_field(netbuf, FIFO);
if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
(brcmf_netbuf_if_flags_get_field(netbuf, REQ_CREDIT)) ||
(flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
brcmf_fws_return_credits(fws, fifo, 1);
brcmf_fws_schedule_deq(fws);
}
brcmf_fws_macdesc_return_req_credit(netbuf);
ret = brcmf_proto_hdrpull(fws->drvr, false, netbuf, &ifp);
if (ret != ZX_OK) {
brcmu_pkt_buf_free_netbuf(netbuf);
return ZX_ERR_INTERNAL;
}
if (!remove_from_hanger) {
ret = brcmf_fws_txstatus_suppressed(fws, fifo, netbuf, genbit, seq);
}
if (remove_from_hanger || ret != ZX_OK) {
brcmf_txfinalize(ifp, netbuf, true);
}
return ZX_OK;
}
static enum brcmf_fws_should_schedule brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info* fws,
uint8_t* data) {
int i;
if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
BRCMF_DBG(INFO, "ignored\n");
return BRCMF_FWS_NOSCHEDULE;
}
BRCMF_DBG(DATA, "enter: data %pM\n", data);
brcmf_fws_lock(fws);
for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) {
brcmf_fws_return_credits(fws, i, data[i]);
}
BRCMF_DBG(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, fws->fifo_delay_map);
brcmf_fws_unlock(fws);
return BRCMF_FWS_SCHEDULE;
}
static enum brcmf_fws_should_schedule brcmf_fws_txstatus_indicate(struct brcmf_fws_info* fws,
uint8_t* data) {
uint32_t status_le;
uint16_t seq_le;
uint32_t status;
uint32_t hslot;
uint32_t genbit;
uint8_t flags;
uint16_t seq;
fws->stats.txs_indicate++;
memcpy(&status_le, data, sizeof(status_le));
status = status_le;
flags = brcmf_txstatus_get_field(status, FLAGS);
hslot = brcmf_txstatus_get_field(status, HSLOT);
genbit = brcmf_txstatus_get_field(status, GENERATION);
if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN], sizeof(seq_le));
seq = seq_le;
} else {
seq = 0;
}
brcmf_fws_lock(fws);
brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
brcmf_fws_unlock(fws);
return BRCMF_FWS_NOSCHEDULE;
}
static zx_status_t brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info* fws, uint8_t* data) {
uint32_t timestamp;
memcpy(&timestamp, &data[2], sizeof(timestamp));
BRCMF_DBG(CTL, "received: seq %d, timestamp %d\n", data[1], timestamp);
return ZX_OK;
}
static zx_status_t brcmf_fws_notify_credit_map(struct brcmf_if* ifp,
const struct brcmf_event_msg* e, void* data) {
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
int i;
uint8_t* credits = static_cast<decltype(credits)>(data);
if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
BRCMF_ERR("event payload too small (%d)\n", e->datalen);
return ZX_ERR_INVALID_ARGS;
}
if (fws->creditmap_received) {
return ZX_OK;
}
fws->creditmap_received = true;
BRCMF_DBG(TRACE, "enter: credits %pM\n", credits);
brcmf_fws_lock(fws);
for (i = 0; i < (int)countof(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(fws);
return ZX_OK;
}
static zx_status_t brcmf_fws_notify_bcmc_credit_support(struct brcmf_if* ifp,
const struct brcmf_event_msg* e,
void* data) {
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
if (fws) {
brcmf_fws_lock(fws);
fws->bcmc_credit_check = true;
brcmf_fws_unlock(fws);
}
return ZX_OK;
}
static void brcmf_rxreorder_get_netbuf_list(struct brcmf_ampdu_rx_reorder* rfi, uint8_t start,
uint8_t end, struct brcmf_netbuf_list* netbuf_list) {
/* initialize return list */
brcmf_netbuf_list_init(netbuf_list);
if (rfi->pend_pkts == 0) {
BRCMF_DBG(INFO, "no packets in reorder queue\n");
return;
}
do {
if (rfi->pktslots[start]) {
brcmf_netbuf_list_add_tail(netbuf_list, rfi->pktslots[start]);
rfi->pktslots[start] = NULL;
}
start++;
if (start > rfi->max_idx) {
start = 0;
}
} while (start != end);
rfi->pend_pkts -= brcmf_netbuf_list_length(netbuf_list);
}
void brcmf_fws_rxreorder(struct brcmf_if* ifp, struct brcmf_netbuf* pkt) {
uint8_t* reorder_data;
uint8_t flow_id, max_idx, cur_idx, exp_idx, end_idx;
struct brcmf_ampdu_rx_reorder* rfi;
struct brcmf_netbuf_list reorder_list;
struct brcmf_netbuf* pnext;
uint8_t flags;
uint32_t buf_size;
reorder_data = ((struct brcmf_netbuf_reorder_data*)pkt->workspace)->reorder;
flow_id = reorder_data[BRCMF_RXREORDER_FLOWID_OFFSET];
flags = reorder_data[BRCMF_RXREORDER_FLAGS_OFFSET];
/* validate flags and flow id */
if (flags == 0xFF) {
BRCMF_ERR("invalid flags...so ignore this packet\n");
brcmf_netif_rx(ifp, pkt);
return;
}
rfi = ifp->drvr->reorder_flows[flow_id];
if (flags & BRCMF_RXREORDER_DEL_FLOW) {
BRCMF_DBG(INFO, "flow-%d: delete\n", flow_id);
if (rfi == NULL) {
BRCMF_DBG(INFO, "received flags to cleanup, but no flow (%d) yet\n", flow_id);
brcmf_netif_rx(ifp, pkt);
return;
}
brcmf_rxreorder_get_netbuf_list(rfi, rfi->exp_idx, rfi->exp_idx, &reorder_list);
/* add the last packet */
brcmf_netbuf_list_add_tail(&reorder_list, pkt);
free(rfi);
ifp->drvr->reorder_flows[flow_id] = NULL;
goto netif_rx;
}
/* from here on we need a flow reorder instance */
if (rfi == NULL) {
buf_size = sizeof(*rfi);
max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
buf_size += (max_idx + 1) * sizeof(pkt);
/* allocate space for flow reorder info */
BRCMF_DBG(INFO, "flow-%d: start, maxidx %d\n", flow_id, max_idx);
rfi = static_cast<decltype(rfi)>(calloc(1, buf_size));
if (rfi == NULL) {
BRCMF_ERR("failed to alloc buffer\n");
brcmf_netif_rx(ifp, pkt);
return;
}
ifp->drvr->reorder_flows[flow_id] = rfi;
rfi->pktslots = (struct brcmf_netbuf**)(rfi + 1);
rfi->max_idx = max_idx;
}
if (flags & BRCMF_RXREORDER_NEW_HOLE) {
if (rfi->pend_pkts) {
brcmf_rxreorder_get_netbuf_list(rfi, rfi->exp_idx, rfi->exp_idx, &reorder_list);
WARN_ON(rfi->pend_pkts);
} else {
brcmf_netbuf_list_init(&reorder_list);
}
rfi->cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
rfi->exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
rfi->max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
rfi->pktslots[rfi->cur_idx] = pkt;
rfi->pend_pkts++;
BRCMF_DBG(DATA, "flow-%d: new hole %d (%d), pending %d\n", flow_id, rfi->cur_idx, rfi->exp_idx,
rfi->pend_pkts);
} else if (flags & BRCMF_RXREORDER_CURIDX_VALID) {
cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
if ((exp_idx == rfi->exp_idx) && (cur_idx != rfi->exp_idx)) {
/* still in the current hole */
/* enqueue the current on the buffer chain */
if (rfi->pktslots[cur_idx] != NULL) {
BRCMF_DBG(INFO, "HOLE: ERROR buffer pending..free it\n");
brcmu_pkt_buf_free_netbuf(rfi->pktslots[cur_idx]);
rfi->pktslots[cur_idx] = NULL;
}
rfi->pktslots[cur_idx] = pkt;
rfi->pend_pkts++;
rfi->cur_idx = cur_idx;
BRCMF_DBG(DATA, "flow-%d: store pkt %d (%d), pending %d\n", flow_id, cur_idx, exp_idx,
rfi->pend_pkts);
/* can return now as there is no reorder
* list to process.
*/
return;
}
if (rfi->exp_idx == cur_idx) {
if (rfi->pktslots[cur_idx] != NULL) {
BRCMF_DBG(INFO, "error buffer pending..free it\n");
brcmu_pkt_buf_free_netbuf(rfi->pktslots[cur_idx]);
rfi->pktslots[cur_idx] = NULL;
}
rfi->pktslots[cur_idx] = pkt;
rfi->pend_pkts++;
/* got the expected one. flush from current to expected
* and update expected
*/
BRCMF_DBG(DATA, "flow-%d: expected %d (%d), pending %d\n", flow_id, cur_idx, exp_idx,
rfi->pend_pkts);
rfi->cur_idx = cur_idx;
rfi->exp_idx = exp_idx;
brcmf_rxreorder_get_netbuf_list(rfi, cur_idx, exp_idx, &reorder_list);
BRCMF_DBG(DATA, "flow-%d: freeing buffers %d, pending %d\n", flow_id,
brcmf_netbuf_list_length(&reorder_list), rfi->pend_pkts);
} else {
uint8_t end_idx;
BRCMF_DBG(DATA, "flow-%d (0x%x): both moved, old %d/%d, new %d/%d\n", flow_id, flags,
rfi->cur_idx, rfi->exp_idx, cur_idx, exp_idx);
if (flags & BRCMF_RXREORDER_FLUSH_ALL) {
end_idx = rfi->exp_idx;
} else {
end_idx = exp_idx;
}
/* flush pkts first */
brcmf_rxreorder_get_netbuf_list(rfi, rfi->exp_idx, end_idx, &reorder_list);
if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) {
brcmf_netbuf_list_add_tail(&reorder_list, pkt);
} else {
rfi->pktslots[cur_idx] = pkt;
rfi->pend_pkts++;
}
rfi->exp_idx = exp_idx;
rfi->cur_idx = cur_idx;
}
} else {
/* explicity window move updating the expected index */
exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
BRCMF_DBG(DATA, "flow-%d (0x%x): change expected: %d -> %d\n", flow_id, flags, rfi->exp_idx,
exp_idx);
if (flags & BRCMF_RXREORDER_FLUSH_ALL) {
end_idx = rfi->exp_idx;
} else {
end_idx = exp_idx;
}
brcmf_rxreorder_get_netbuf_list(rfi, rfi->exp_idx, end_idx, &reorder_list);
brcmf_netbuf_list_add_tail(&reorder_list, pkt);
/* set the new expected idx */
rfi->exp_idx = exp_idx;
}
netif_rx:
brcmf_netbuf_list_for_every_safe(&reorder_list, pkt, pnext) {
brcmf_netbuf_list_remove(&reorder_list, pkt);
brcmf_netif_rx(ifp, pkt);
}
}
void brcmf_fws_hdrpull(struct brcmf_if* ifp, int16_t siglen, struct brcmf_netbuf* netbuf) {
struct brcmf_netbuf_reorder_data* rd;
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
uint8_t* signal_data;
int16_t data_len;
uint8_t type;
uint8_t len;
uint8_t* data;
int tlv_len;
zx_status_t err;
enum brcmf_fws_should_schedule schedule_status;
BRCMF_DBG(HDRS, "enter: ifidx %d, netbuflen %u, siglen %d\n", ifp->ifidx, netbuf->len, siglen);
WARN_ON(siglen > (int32_t)netbuf->len);
if (!siglen) {
return;
}
/* if flow control disabled, skip to packet data and leave */
if ((!fws) || (!fws->fw_signals)) {
brcmf_netbuf_shrink_head(netbuf, siglen);
return;
}
fws->stats.header_pulls++;
data_len = siglen;
signal_data = netbuf->data;
schedule_status = BRCMF_FWS_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;
err = brcmf_fws_get_tlv_len(fws, static_cast<brcmf_fws_tlv_type>(type), &tlv_len);
BRCMF_DBG(HDRS, "tlv type=%s (%d), len=%d (%d:%d)\n",
brcmf_fws_get_tlv_name(static_cast<brcmf_fws_tlv_type>(type)), type, len, err,
tlv_len);
/* abort parsing when length invalid */
if (data_len < len + 2) {
break;
}
err = brcmf_fws_get_tlv_len(fws, static_cast<brcmf_fws_tlv_type>(type), &tlv_len);
if (err != ZX_OK || len < tlv_len) {
break;
}
switch (type) {
case BRCMF_FWS_TYPE_COMP_TXSTATUS:
break;
case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
rd = (struct brcmf_netbuf_reorder_data*)netbuf->workspace;
rd->reorder = data;
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:
schedule_status = brcmf_fws_macdesc_state_indicate(fws, type, data);
break;
case BRCMF_FWS_TYPE_INTERFACE_OPEN:
case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
schedule_status = brcmf_fws_interface_state_indicate(fws, type, data);
break;
case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
schedule_status = brcmf_fws_request_indicate(fws, type, data);
break;
case BRCMF_FWS_TYPE_TXSTATUS:
// TODO(cphoenix): Should this set schedule_status?
brcmf_fws_txstatus_indicate(fws, data);
break;
case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
schedule_status = brcmf_fws_fifocreditback_indicate(fws, data);
break;
case BRCMF_FWS_TYPE_RSSI:
brcmf_fws_rssi_indicate(ifp, *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;
}
signal_data += len + 2;
data_len -= len + 2;
}
if (data_len != 0) {
fws->stats.tlv_parse_failed++;
}
if (schedule_status == BRCMF_FWS_SCHEDULE) {
brcmf_fws_schedule_deq(fws);
}
/* signalling processing result does
* not affect the actual ethernet packet.
*/
brcmf_netbuf_shrink_head(netbuf, siglen);
/* this may be a signal-only packet
*/
if (netbuf->len == 0) {
fws->stats.header_only_pkt++;
}
}
static uint8_t brcmf_fws_precommit_netbuf(struct brcmf_fws_info* fws, int fifo,
struct brcmf_netbuf* p) {
struct brcmf_netbuf_workspace* workspace = brcmf_workspace(p);
// TODO(cphoenix): workspace->mac and mac_status are often unchecked in this file.
// Be more paranoid?
struct brcmf_fws_mac_descriptor* entry = workspace->mac;
uint8_t flags;
if (workspace->state != BRCMF_FWS_NETBUFSTATE_SUPPRESSED) {
brcmf_netbuf_htod_tag_set_field(p, GENERATION, entry->generation);
}
flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
if (brcmf_netbuf_if_flags_get_field(p, REQUESTED)) {
/*
* 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_netbuf_htod_tag_set_field(p, FLAGS, flags);
return brcmf_fws_hdrpush(fws, p);
}
static void brcmf_fws_rollback_toq(struct brcmf_fws_info* fws, struct brcmf_netbuf* netbuf,
int fifo) {
struct brcmf_fws_mac_descriptor* entry;
struct brcmf_netbuf* pktout;
int qidx, hslot;
zx_status_t rc = ZX_OK;
entry = brcmf_workspace(netbuf)->mac;
if (entry->occupied) {
qidx = 2 * fifo;
if (brcmf_workspace(netbuf)->state == BRCMF_FWS_NETBUFSTATE_SUPPRESSED) {
qidx++;
}
pktout = brcmu_pktq_penq_head(&entry->psq, qidx, netbuf);
if (pktout == NULL) {
BRCMF_ERR("%s queue %d full\n", entry->name, qidx);
rc = ZX_ERR_NO_RESOURCES;
}
} else {
BRCMF_ERR("%s entry removed\n", entry->name);
rc = ZX_ERR_NOT_FOUND;
}
if (rc != ZX_OK) {
fws->stats.rollback_failed++;
hslot = brcmf_netbuf_htod_tag_get_field(netbuf, HSLOT);
brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
} else {
fws->stats.rollback_success++;
brcmf_fws_return_credits(fws, fifo, 1);
brcmf_fws_macdesc_return_req_credit(netbuf);
}
}
static zx_status_t brcmf_fws_borrow_credit(struct brcmf_fws_info* fws) {
int lender_ac;
if (fws->borrow_defer_timestamp > zx_clock_get_monotonic()) {
fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
return ZX_ERR_UNAVAILABLE;
}
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);
}
fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
BRCMF_DBG(DATA, "borrow credit from: %d\n", lender_ac);
return ZX_OK;
}
}
fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
return ZX_ERR_UNAVAILABLE;
}
static zx_status_t brcmf_fws_commit_netbuf(struct brcmf_fws_info* fws, int fifo,
struct brcmf_netbuf* netbuf) {
struct brcmf_netbuf_workspace* workspace = brcmf_workspace(netbuf);
struct brcmf_fws_mac_descriptor* entry;
zx_status_t rc;
uint8_t ifidx;
uint8_t data_offset;
if (workspace->mac_status != ZX_OK) {
return workspace->mac_status;
}
entry = workspace->mac;
data_offset = brcmf_fws_precommit_netbuf(fws, fifo, netbuf);
entry->transit_count++;
if (entry->suppressed) {
entry->suppr_transit_count++;
}
ifidx = brcmf_netbuf_if_flags_get_field(netbuf, INDEX);
brcmf_fws_unlock(fws);
rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, netbuf);
brcmf_fws_lock(fws);
BRCMF_DBG(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, workspace->if_flags,
workspace->htod, rc);
if (rc != ZX_OK) {
entry->transit_count--;
if (entry->suppressed) {
entry->suppr_transit_count--;
}
(void)brcmf_proto_hdrpull(fws->drvr, false, netbuf, NULL);
goto rollback;
}
fws->stats.pkt2bus++;
fws->stats.send_pkts[fifo]++;
if (brcmf_netbuf_if_flags_get_field(netbuf, REQUESTED)) {
fws->stats.requested_sent[fifo]++;
}
return rc;
rollback:
brcmf_fws_rollback_toq(fws, netbuf, fifo);
return rc;
}
static zx_status_t brcmf_fws_assign_htod(struct brcmf_fws_info* fws, struct brcmf_netbuf* p,
int fifo) {
struct brcmf_netbuf_workspace* workspace = brcmf_workspace(p);
zx_status_t rc;
int hslot;
workspace->htod = 0;
workspace->htod_seq = 0;
hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
brcmf_netbuf_htod_tag_set_field(p, HSLOT, hslot);
brcmf_netbuf_htod_tag_set_field(p, FREERUN, workspace->mac->seq[fifo]);
brcmf_netbuf_htod_tag_set_field(p, FIFO, fifo);
rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
if (rc == ZX_OK) {
workspace->mac->seq[fifo]++;
} else {
fws->stats.generic_error++;
}
return rc;
}
zx_status_t brcmf_fws_process_netbuf(struct brcmf_if* ifp, struct brcmf_netbuf* netbuf) {
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
struct brcmf_netbuf_workspace* workspace = brcmf_workspace(netbuf);
struct ethhdr* eh = (struct ethhdr*)(netbuf->data);
int fifo = BRCMF_FWS_FIFO_BCMC;
bool multicast = address_is_multicast(eh->h_dest);
zx_status_t rc = ZX_OK;
BRCMF_DBG(DATA, "tx proto=0x%X\n", be16toh(eh->h_proto));
/* set control buffer information */
workspace->if_flags = 0;
workspace->state = BRCMF_FWS_NETBUFSTATE_NEW;
brcmf_netbuf_if_flags_set_field(netbuf, INDEX, ifp->ifidx);
if (!multicast) {
fifo = brcmf_fws_prio2fifo[netbuf->priority];
}
brcmf_fws_lock(fws);
if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) {
fws->borrow_defer_timestamp =
zx_clock_get_monotonic() + ZX_MSEC(BRCMF_FWS_BORROW_DEFER_PERIOD_MSEC);
}
workspace->mac_status = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest, &workspace->mac);
BRCMF_DBG(DATA, "%s mac %pM multi %d fifo %d\n", workspace->mac->name, eh->h_dest, multicast,
fifo);
if (brcmf_fws_assign_htod(fws, netbuf, fifo) == ZX_OK) {
brcmf_fws_enq(fws, BRCMF_FWS_NETBUFSTATE_DELAYED, fifo, netbuf);
brcmf_fws_schedule_deq(fws);
} else {
BRCMF_ERR("drop netbuf: no hanger slot\n");
brcmf_txfinalize(ifp, netbuf, false);
rc = ZX_ERR_NO_MEMORY;
}
brcmf_fws_unlock(fws);
return rc;
}
void brcmf_fws_reset_interface(struct brcmf_if* ifp) {
struct brcmf_fws_mac_descriptor* entry = ifp->fws_desc;
BRCMF_DBG(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
if (!entry) {
return;
}
brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
}
void brcmf_fws_add_interface(struct brcmf_if* ifp) {
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
struct brcmf_fws_mac_descriptor* entry;
if (!ifp->ndev || !brcmf_fws_queue_netbufs(fws)) {
return;
}
entry = &fws->desc.iface[ifp->ifidx];
ifp->fws_desc = entry;
brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
brcmf_fws_macdesc_set_name(fws, entry);
brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, BRCMF_FWS_PSQ_LEN);
BRCMF_DBG(TRACE, "added %s\n", entry->name);
}
void brcmf_fws_del_interface(struct brcmf_if* ifp) {
struct brcmf_fws_mac_descriptor* entry = ifp->fws_desc;
struct brcmf_fws_info* fws = drvr_to_fws(ifp->drvr);
if (!entry) {
return;
}
brcmf_fws_lock(fws);
ifp->fws_desc = NULL;
BRCMF_DBG(TRACE, "deleting %s\n", entry->name);
brcmf_fws_macdesc_deinit(entry);
brcmf_fws_cleanup(fws, ifp->ifidx);
brcmf_fws_unlock(fws);
}
static void brcmf_fws_dequeue_worker(struct work_struct* worker) {
struct brcmf_fws_info* fws;
struct brcmf_pub* drvr;
struct brcmf_netbuf* netbuf;
int fifo;
uint32_t hslot;
uint32_t ifidx;
zx_status_t ret;
fws = containerof(worker, struct brcmf_fws_info, fws_dequeue_work);
drvr = fws->drvr;
brcmf_fws_lock(fws);
for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; fifo--) {
if (!brcmf_fws_fc_active(fws)) {
while ((netbuf = brcmf_fws_deq(fws, fifo)) != NULL) {
hslot = brcmf_netbuf_htod_tag_get_field(netbuf, HSLOT);
brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &netbuf, true);
ifidx = brcmf_netbuf_if_flags_get_field(netbuf, INDEX);
/* Use proto layer to send data frame */
brcmf_fws_unlock(fws);
ret = brcmf_proto_txdata(drvr, ifidx, 0, netbuf);
brcmf_fws_lock(fws);
if (ret != ZX_OK) {
brcmf_txfinalize(brcmf_get_ifp(drvr, ifidx), netbuf, false);
}
if (fws->bus_flow_blocked) {
break;
}
}
continue;
}
while ((fws->fifo_credit[fifo]) ||
((!fws->bcmc_credit_check) && (fifo == BRCMF_FWS_FIFO_BCMC))) {
netbuf = brcmf_fws_deq(fws, fifo);
if (!netbuf) {
break;
}
fws->fifo_credit[fifo]--;
if (brcmf_fws_commit_netbuf(fws, fifo, netbuf) != ZX_OK) {
break;
}
if (fws->bus_flow_blocked) {
break;
}
}
if ((fifo == BRCMF_FWS_FIFO_AC_BE) && (fws->fifo_credit[fifo] == 0) &&
(!fws->bus_flow_blocked)) {
while (brcmf_fws_borrow_credit(fws) == ZX_OK) {
netbuf = brcmf_fws_deq(fws, fifo);
if (!netbuf) {
brcmf_fws_return_credits(fws, fifo, 1);
break;
}
if (brcmf_fws_commit_netbuf(fws, fifo, netbuf) != ZX_OK) {
break;
}
if (fws->bus_flow_blocked) {
break;
}
}
}
}
brcmf_fws_unlock(fws);
}
zx_status_t brcmf_fws_attach(struct brcmf_pub* drvr, struct brcmf_fws_info** fws_out) {
struct brcmf_fws_info* fws;
struct brcmf_if* ifp;
uint32_t tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
zx_status_t rc;
uint32_t mode;
if (fws_out) {
*fws_out = NULL;
}
fws = static_cast<decltype(fws)>(calloc(1, sizeof(*fws)));
if (!fws) {
rc = ZX_ERR_NO_MEMORY;
goto fail;
}
// spin_lock_init(&fws->spinlock);
/* store drvr reference */
fws->drvr = drvr;
fws->fcmode = static_cast<brcmf_fws_fcmode>(drvr->settings->fcmode);
if ((drvr->bus_if->always_use_fws_queue == false) && (fws->fcmode == BRCMF_FWS_FCMODE_NONE)) {
fws->avoid_queueing = true;
BRCMF_DBG(INFO, "FWS queueing will be avoided\n");
if (fws_out) {
*fws_out = fws;
}
return ZX_OK;
}
fws->fws_wq = workqueue_create("brcmf_fws_wq");
if (fws->fws_wq == NULL) {
BRCMF_ERR("workqueue creation failed\n");
rc = ZX_ERR_NO_RESOURCES;
goto fail;
}
workqueue_init_work(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
/* enable firmware signalling if fcmode active */
if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE | BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, brcmf_fws_notify_credit_map);
if (rc != ZX_OK) {
BRCMF_ERR("register credit map handler failed\n");
goto fail;
}
rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, brcmf_fws_notify_bcmc_credit_support);
if (rc != ZX_OK) {
BRCMF_ERR("register bcmc credit handler failed\n");
brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
goto fail;
}
/* Setting the iovar may fail if feature is unsupported
* so leave the rc as is so driver initialization can
* continue. Set mode back to none indicating not enabled.
*/
fws->fw_signals = true;
ifp = brcmf_get_ifp(drvr, 0);
if (brcmf_fil_iovar_int_set(ifp, "tlv", tlv, nullptr) != ZX_OK) {
BRCMF_ERR("failed to set bdcv2 tlv signaling\n");
fws->fcmode = BRCMF_FWS_FCMODE_NONE;
fws->fw_signals = false;
}
if (brcmf_fil_iovar_int_set(ifp, "ampdu_hostreorder", 1, nullptr) != ZX_OK) {
BRCMF_DBG(INFO, "enabling AMPDU host-reorder failed\n");
}
/* Enable seq number reuse, if supported */
if (brcmf_fil_iovar_int_get(ifp, "wlfc_mode", &mode, nullptr) == ZX_OK) {
if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
mode = 0;
BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
if (brcmf_fil_iovar_int_set(ifp, "wlfc_mode", mode, nullptr) == ZX_OK) {
BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
}
}
}
brcmf_fws_hanger_init(&fws->hanger);
brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
BRCMF_DBG(INFO, "added %s\n", fws->desc.other.name);
brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, BRCMF_FWS_PSQ_LEN);
BRCMF_DBG(INFO, "%s bdcv2 tlv signaling [%x]\n", fws->fw_signals ? "enabled" : "disabled", tlv);
if (fws_out) {
*fws_out = fws;
}
return ZX_OK;
fail:
brcmf_fws_detach(fws);
return rc;
}
void brcmf_fws_detach(struct brcmf_fws_info* fws) {
if (!fws) {
return;
}
if (fws->fws_wq) {
workqueue_destroy(fws->fws_wq);
}
/* cleanup */
brcmf_fws_lock(fws);
brcmf_fws_cleanup(fws, -1);
brcmf_fws_unlock(fws);
/* free top structure */
free(fws);
}
bool brcmf_fws_queue_netbufs(struct brcmf_fws_info* fws) { return !fws->avoid_queueing; }
bool brcmf_fws_fc_active(struct brcmf_fws_info* fws) {
if (!fws->creditmap_received) {
return false;
}
return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
}
void brcmf_fws_bustxfail(struct brcmf_fws_info* fws, struct brcmf_netbuf* netbuf) {
uint32_t hslot;
if (brcmf_workspace(netbuf)->state == BRCMF_FWS_NETBUFSTATE_TIM) {
brcmu_pkt_buf_free_netbuf(netbuf);
return;
}
brcmf_fws_lock(fws);
hslot = brcmf_netbuf_htod_tag_get_field(netbuf, HSLOT);
brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
brcmf_fws_unlock(fws);
}
void brcmf_fws_bus_blocked(struct brcmf_pub* drvr, bool flow_blocked) {
struct brcmf_fws_info* fws = drvr_to_fws(drvr);
struct brcmf_if* ifp;
int i;
if (fws->avoid_queueing) {
for (i = 0; i < BRCMF_MAX_IFS; i++) {
ifp = drvr->iflist[i];
if (!ifp || !ifp->ndev) {
continue;
}
brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW, flow_blocked);
}
} else {
fws->bus_flow_blocked = flow_blocked;
if (!flow_blocked) {
brcmf_fws_schedule_deq(fws);
} else {
fws->stats.bus_flow_block++;
}
}
}