diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c | 2271 |
1 files changed, 0 insertions, 2271 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c deleted file mode 100644 index 086cac3f8..000000000 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c +++ /dev/null @@ -1,2271 +0,0 @@ -/* - * 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 <net/cfg80211.h> - -#include <brcmu_utils.h> -#include <brcmu_wifi.h> -#include "core.h" -#include "debug.h" -#include "bus.h" -#include "fwil.h" -#include "fwil_types.h" -#include "fweh.h" -#include "fwsignal.h" -#include "p2p.h" -#include "cfg80211.h" -#include "proto.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 */ - -/* - * 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 - -#define BRCMF_FWS_RET_OK_NOSCHEDULE 0 -#define BRCMF_FWS_RET_OK_SCHEDULE 1 - -#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_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. - * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info. - */ -enum brcmf_fws_skb_state { - BRCMF_FWS_SKBSTATE_NEW, - BRCMF_FWS_SKBSTATE_DELAYED, - BRCMF_FWS_SKBSTATE_SUPPRESSED, - BRCMF_FWS_SKBSTATE_TIM -}; - -/** - * struct brcmf_skbuff_cb - control buffer associated with skbuff. - * - * @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 sk_buff::cb, which - * provides 48 bytes of storage so this structure should not exceed that. - */ -struct brcmf_skbuff_cb { - u16 bus_flags; - u16 if_flags; - u32 htod; - u16 htod_seq; - 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 used requested credit - * b[7] - interface in AP mode. - * 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_REQ_CREDIT_MASK 0x0100 -#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_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_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_SKB_HTOD_SEQ_FROMFW_MASK 0x2000 -#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13 -#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000 -#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12 -#define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff -#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0 - -#define brcmf_skb_htod_seq_set_field(skb, field, value) \ - brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \ - BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \ - BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value)) -#define brcmf_skb_htod_seq_get_field(skb, field) \ - brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \ - BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \ - BRCMF_SKB_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 - -#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_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]; - 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 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. - * @pkt: packet itself. - */ -struct brcmf_fws_hanger_item { - enum brcmf_fws_hanger_item_state state; - 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_stats { - u32 tlv_parse_failed; - u32 tlv_invalid_type; - u32 header_only_pkt; - u32 header_pulls; - u32 pkt2bus; - u32 send_pkts[5]; - u32 requested_sent[5]; - u32 generic_error; - u32 mac_update_failed; - u32 mac_ps_update_failed; - u32 if_update_failed; - u32 packet_request_failed; - u32 credit_request_failed; - u32 rollback_success; - u32 rollback_failed; - u32 delayq_full_error; - u32 supprq_full_error; - u32 txs_indicate; - u32 txs_discard; - u32 txs_supp_core; - u32 txs_supp_ps; - u32 txs_tossed; - u32 txs_host_tossed; - u32 bus_flow_block; - u32 fws_flow_block; -}; - -struct brcmf_fws_info { - struct brcmf_pub *drvr; - spinlock_t spinlock; - ulong flags; - 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; - 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; - bool bus_flow_blocked; - bool creditmap_received; - u8 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 -}; - -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 void brcmf_fws_lock(struct brcmf_fws_info *fws) - __acquires(&fws->spinlock) -{ - spin_lock_irqsave(&fws->spinlock, fws->flags); -} - -static void brcmf_fws_unlock(struct brcmf_fws_info *fws) - __releases(&fws->spinlock) -{ - spin_unlock_irqrestore(&fws->spinlock, fws->flags); -} - -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; - - 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; - - 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 int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, - struct sk_buff *pkt, u32 slot_id) -{ - 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 inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, - u32 slot_id, struct sk_buff **pktout, - bool remove_item) -{ - 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->popped++; - } - return 0; -} - -static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, - u32 slot_id) -{ - 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"); - return -EINVAL; - } - - h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; - 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; - - 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_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) - scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", - desc->mac_handle, desc->interface_id); - else - scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", - desc->interface_id); -} - -static void brcmf_fws_macdesc_init(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; - desc->requested_packet = 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_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 struct brcmf_fws_mac_descriptor * -brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea) -{ - struct brcmf_fws_mac_descriptor *entry; - int i; - - 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_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) -{ - struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; - bool multicast; - - multicast = is_multicast_ether_addr(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) { - entry = ifp->fws_desc; - goto done; - } - - entry = brcmf_fws_macdesc_lookup(fws, da); - if (IS_ERR(entry)) - entry = ifp->fws_desc; - -done: - return entry; -} - -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 sk_buff *, void *), - int ifidx) -{ - struct brcmf_fws_hanger_item *hi; - struct pktq *txq; - struct sk_buff *skb; - int prec; - u32 hslot; - - 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; - - 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_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 u8 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); - __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq); - - brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n", - entry->name, brcmf_skb_if_flags_get_field(skb, INDEX), - (le32_to_cpu(pkttag) >> 8) & 0xffff, - brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->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; - - 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)); - 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 (u8)(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 sk_buff *skb; - struct brcmf_skbuff_cb *skcb; - s32 err; - u32 len; - u8 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; - skb = brcmu_pkt_buf_get_skb(len); - if (skb == NULL) - return false; - skb_pull(skb, len); - skcb = brcmf_skbcb(skb); - skcb->mac = entry; - skcb->state = BRCMF_FWS_SKBSTATE_TIM; - skcb->htod = 0; - skcb->htod_seq = 0; - data_offset = brcmf_fws_hdrpush(fws, skb); - ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); - brcmf_fws_unlock(fws); - err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb); - brcmf_fws_lock(fws); - if (err) - brcmu_pkt_buf_free_skb(skb); - return true; - } - return false; -} - -static void -brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, - u8 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 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) { - 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 0; - } - - existing = brcmf_fws_macdesc_lookup(fws, addr); - if (IS_ERR(existing)) { - 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 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 ret; - - mac_handle = data[0]; - entry = &fws->desc.nodes[mac_handle & 0x1F]; - if (!entry->occupied) { - fws->stats.mac_ps_update_failed++; - return -ESRCH; - } - 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_RET_OK_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_RET_OK_NOSCHEDULE; - } - brcmf_fws_unlock(fws); - return ret; -} - -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]; - - if (ifidx >= BRCMF_MAX_IFS) { - ret = -ERANGE; - goto fail; - } - - entry = &fws->desc.iface[ifidx]; - if (!entry->occupied) { - ret = -ESRCH; - goto fail; - } - - brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(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_RET_OK_SCHEDULE; - break; - case BRCMF_FWS_TYPE_INTERFACE_CLOSE: - entry->state = BRCMF_FWS_STATE_CLOSE; - ret = BRCMF_FWS_RET_OK_NOSCHEDULE; - break; - default: - ret = -EINVAL; - brcmf_fws_unlock(fws); - goto fail; - } - brcmf_fws_unlock(fws); - return ret; - -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; - } - - brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", - brcmf_fws_get_tlv_name(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_RET_OK_SCHEDULE; -} - -static void -brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, - struct sk_buff *skb) -{ - if (entry->requested_credit > 0) { - entry->requested_credit--; - brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); - brcmf_skb_if_flags_set_field(skb, 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_skb_if_flags_set_field(skb, REQUESTED, 1); - brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); - if (entry->state != BRCMF_FWS_STATE_CLOSE) - brcmf_err("requested packet set while mac not closed!\n"); - } else { - brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); - brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); - } -} - -static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) -{ - struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; - - if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && - (entry->state == BRCMF_FWS_STATE_CLOSE)) - entry->requested_credit++; -} - -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; - - 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)) - queue_work(fws->fws_wq, &fws->fws_dequeue_work); -} - -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; - struct pktq *pq; - struct sk_buff_head *queue; - struct sk_buff *p_head; - struct sk_buff *p_tail; - u32 fr_new; - u32 fr_compare; - - entry = brcmf_skbcb(p)->mac; - if (entry == NULL) { - brcmf_err("no mac descriptor found for skb %p\n", p); - return -ENOENT; - } - - brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); - if (state == BRCMF_FWS_SKBSTATE_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 -ENFILE; - } - queue = &pq->q[prec].skblist; - - p_head = skb_peek(queue); - p_tail = skb_peek_tail(queue); - fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN); - - while (p_head != p_tail) { - fr_compare = brcmf_skb_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 = skb_queue_prev(queue, p_tail); - } - /* Position found. Determine what to do */ - if (p_tail == NULL) { - /* empty list */ - __skb_queue_tail(queue, p); - } else { - fr_compare = brcmf_skb_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 */ - __skb_queue_after(queue, p_tail, p); - } else { - /* Before tail */ - __skb_insert(p, p_tail->prev, p_tail, queue); - } - } - - /* Complete the counters and statistics */ - pq->len++; - if (pq->hi_prec < prec) - pq->hi_prec = (u8) prec; - } else 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; - - /* - * 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_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 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_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, 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 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, u16 seq) -{ - 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->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_skb_htod_tag_set_field(skb, GENERATION, genbit); - brcmf_skbcb(skb)->htod_seq = seq; - if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) { - brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1); - brcmf_skb_htod_seq_set_field(skb, FROMFW, 0); - } else { - brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0); - } - 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); - } - - return ret; -} - -static int -brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, - u32 genbit, u16 seq) -{ - u32 fifo; - int ret; - bool remove_from_hanger = true; - struct sk_buff *skb; - struct brcmf_skbuff_cb *skcb; - 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, &skb, - remove_from_hanger); - if (ret != 0) { - brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); - return ret; - } - - skcb = brcmf_skbcb(skb); - entry = skcb->mac; - if (WARN_ON(!entry)) { - brcmu_pkt_buf_free_skb(skb); - return -EINVAL; - } - 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, - skcb->htod, seq); - - /* pick up the implicit credit from this packet */ - fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); - if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || - (brcmf_skb_if_flags_get_field(skb, 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(skb); - - ret = brcmf_proto_hdrpull(fws->drvr, false, skb, &ifp); - if (ret) { - brcmu_pkt_buf_free_skb(skb); - return -EINVAL; - } - if (!remove_from_hanger) - ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, - genbit, seq); - if (remove_from_hanger || ret) - brcmf_txfinalize(ifp, 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(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_RET_OK_SCHEDULE; -} - -static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) -{ - __le32 status_le; - __le16 seq_le; - u32 status; - u32 hslot; - u32 genbit; - u8 flags; - u16 seq; - - 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); - if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) { - memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN], - sizeof(seq_le)); - seq = le16_to_cpu(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_RET_OK_NOSCHEDULE; -} - -static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) -{ - __le32 timestamp; - - memcpy(×tamp, &data[2], sizeof(timestamp)); - brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], - le32_to_cpu(timestamp)); - return 0; -} - -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; - u8 *credits = data; - - if (e->datalen < BRCMF_FWS_FIFO_COUNT) { - brcmf_err("event payload too small (%d)\n", e->datalen); - return -EINVAL; - } - if (fws->creditmap_received) - return 0; - - fws->creditmap_received = true; - - brcmf_dbg(TRACE, "enter: credits %pM\n", credits); - brcmf_fws_lock(fws); - 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(fws); - return 0; -} - -static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, - const struct brcmf_event_msg *e, - void *data) -{ - struct brcmf_fws_info *fws = ifp->drvr->fws; - - brcmf_fws_lock(fws); - if (fws) - fws->bcmc_credit_check = true; - brcmf_fws_unlock(fws); - return 0; -} - -void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb) -{ - struct brcmf_skb_reorder_data *rd; - struct brcmf_fws_info *fws = ifp->drvr->fws; - u8 *signal_data; - s16 data_len; - u8 type; - u8 len; - u8 *data; - s32 status; - s32 err; - - brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", - ifp->ifidx, skb->len, siglen); - - WARN_ON(siglen > skb->len); - - if (!siglen) - return; - /* if flow control disabled, skip to packet data and leave */ - if ((!fws) || (!fws->fw_signals)) { - skb_pull(skb, siglen); - return; - } - - fws->stats.header_pulls++; - data_len = siglen; - 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(HDRS, "tlv type=%s (%d), len=%d (%d)\n", - brcmf_fws_get_tlv_name(type), type, len, - brcmf_fws_get_tlv_len(fws, type)); - - /* 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_COMP_TXSTATUS: - break; - case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: - rd = (struct brcmf_skb_reorder_data *)skb->cb; - 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: - 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, siglen); - - /* this may be a signal-only packet - */ - if (skb->len == 0) - fws->stats.header_only_pkt++; -} - -static u8 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; - u8 flags; - - if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED) - brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); - flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; - if (brcmf_skb_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_skb_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 sk_buff *skb, int fifo) -{ - struct brcmf_fws_mac_descriptor *entry; - struct sk_buff *pktout; - int qidx, hslot; - int rc = 0; - - entry = brcmf_skbcb(skb)->mac; - if (entry->occupied) { - qidx = 2 * fifo; - if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) - qidx++; - - pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); - if (pktout == NULL) { - brcmf_err("%s queue %d full\n", entry->name, qidx); - rc = -ENOSPC; - } - } else { - brcmf_err("%s entry removed\n", entry->name); - rc = -ENOENT; - } - - if (rc) { - fws->stats.rollback_failed++; - hslot = brcmf_skb_htod_tag_get_field(skb, 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(skb); - } -} - -static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) -{ - int lender_ac; - - if (time_after(fws->borrow_defer_timestamp, jiffies)) { - fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); - 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); - fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); - brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); - return 0; - } - } - fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); - return -ENAVAIL; -} - -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; - int rc; - u8 ifidx; - u8 data_offset; - - entry = skcb->mac; - if (IS_ERR(entry)) - return PTR_ERR(entry); - - data_offset = brcmf_fws_precommit_skb(fws, fifo, skb); - entry->transit_count++; - if (entry->suppressed) - entry->suppr_transit_count++; - ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); - brcmf_fws_unlock(fws); - rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb); - brcmf_fws_lock(fws); - brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, - skcb->if_flags, skcb->htod, rc); - if (rc < 0) { - entry->transit_count--; - if (entry->suppressed) - entry->suppr_transit_count--; - (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL); - goto rollback; - } - - fws->stats.pkt2bus++; - fws->stats.send_pkts[fifo]++; - if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) - fws->stats.requested_sent[fifo]++; - - return rc; - -rollback: - brcmf_fws_rollback_toq(fws, skb, fifo); - return rc; -} - -static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, - int fifo) -{ - struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); - int rc, hslot; - - skcb->htod = 0; - skcb->htod_seq = 0; - hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); - brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); - brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); - brcmf_skb_htod_tag_set_field(p, FIFO, fifo); - rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); - if (!rc) - skcb->mac->seq[fifo]++; - else - fws->stats.generic_error++; - 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); - int fifo = BRCMF_FWS_FIFO_BCMC; - bool multicast = is_multicast_ether_addr(eh->h_dest); - int rc = 0; - - brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto)); - /* determine the priority */ - if (!skb->priority) - skb->priority = cfg80211_classify8021d(skb, NULL); - - drvr->tx_multicast += !!multicast; - - if (fws->avoid_queueing) { - rc = brcmf_proto_txdata(drvr, ifp->ifidx, 0, skb); - if (rc < 0) - brcmf_txfinalize(ifp, skb, false); - return rc; - } - - /* set control buffer information */ - skcb->if_flags = 0; - 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_fws_lock(fws); - if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) - fws->borrow_defer_timestamp = jiffies + - BRCMF_FWS_BORROW_DEFER_PERIOD; - - skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); - brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, - eh->h_dest, multicast, fifo); - if (!brcmf_fws_assign_htod(fws, skb, fifo)) { - brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); - brcmf_fws_schedule_deq(fws); - } else { - brcmf_err("drop skb: no hanger slot\n"); - brcmf_txfinalize(ifp, skb, false); - rc = -ENOMEM; - } - 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: idx=%d\n", ifp->bssidx); - 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 = ifp->drvr->fws; - struct brcmf_fws_mac_descriptor *entry; - - if (!ifp->ndev) - 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; - - if (!entry) - return; - - brcmf_fws_lock(ifp->drvr->fws); - ifp->fws_desc = NULL; - brcmf_dbg(TRACE, "deleting %s\n", entry->name); - brcmf_fws_macdesc_deinit(entry); - brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); - brcmf_fws_unlock(ifp->drvr->fws); -} - -static void brcmf_fws_dequeue_worker(struct work_struct *worker) -{ - struct brcmf_fws_info *fws; - struct brcmf_pub *drvr; - struct sk_buff *skb; - int fifo; - u32 hslot; - u32 ifidx; - int ret; - - fws = container_of(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 ((skb = brcmf_fws_deq(fws, fifo)) != NULL) { - hslot = brcmf_skb_htod_tag_get_field(skb, - HSLOT); - brcmf_fws_hanger_poppkt(&fws->hanger, hslot, - &skb, true); - ifidx = brcmf_skb_if_flags_get_field(skb, - INDEX); - /* Use proto layer to send data frame */ - brcmf_fws_unlock(fws); - ret = brcmf_proto_txdata(drvr, ifidx, 0, skb); - brcmf_fws_lock(fws); - if (ret < 0) - brcmf_txfinalize(brcmf_get_ifp(drvr, - ifidx), - skb, false); - if (fws->bus_flow_blocked) - break; - } - continue; - } - while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && - (fifo == BRCMF_FWS_FIFO_BCMC))) { - skb = brcmf_fws_deq(fws, fifo); - if (!skb) - break; - fws->fifo_credit[fifo]--; - if (brcmf_fws_commit_skb(fws, fifo, skb)) - 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) == 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)) - break; - if (fws->bus_flow_blocked) - break; - } - } - } - brcmf_fws_unlock(fws); -} - -#ifdef DEBUG -static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data) -{ - struct brcmf_bus *bus_if = dev_get_drvdata(seq->private); - struct brcmf_fws_stats *fwstats = &bus_if->drvr->fws->stats; - - seq_printf(seq, - "header_pulls: %u\n" - "header_only_pkt: %u\n" - "tlv_parse_failed: %u\n" - "tlv_invalid_type: %u\n" - "mac_update_fails: %u\n" - "ps_update_fails: %u\n" - "if_update_fails: %u\n" - "pkt2bus: %u\n" - "generic_error: %u\n" - "rollback_success: %u\n" - "rollback_failed: %u\n" - "delayq_full: %u\n" - "supprq_full: %u\n" - "txs_indicate: %u\n" - "txs_discard: %u\n" - "txs_suppr_core: %u\n" - "txs_suppr_ps: %u\n" - "txs_tossed: %u\n" - "txs_host_tossed: %u\n" - "bus_flow_block: %u\n" - "fws_flow_block: %u\n" - "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n" - "requested_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n", - fwstats->header_pulls, - fwstats->header_only_pkt, - fwstats->tlv_parse_failed, - fwstats->tlv_invalid_type, - fwstats->mac_update_failed, - fwstats->mac_ps_update_failed, - fwstats->if_update_failed, - fwstats->pkt2bus, - fwstats->generic_error, - fwstats->rollback_success, - fwstats->rollback_failed, - fwstats->delayq_full_error, - fwstats->supprq_full_error, - fwstats->txs_indicate, - fwstats->txs_discard, - fwstats->txs_supp_core, - fwstats->txs_supp_ps, - fwstats->txs_tossed, - fwstats->txs_host_tossed, - fwstats->bus_flow_block, - fwstats->fws_flow_block, - fwstats->send_pkts[0], fwstats->send_pkts[1], - fwstats->send_pkts[2], fwstats->send_pkts[3], - fwstats->send_pkts[4], - fwstats->requested_sent[0], - fwstats->requested_sent[1], - fwstats->requested_sent[2], - fwstats->requested_sent[3], - fwstats->requested_sent[4]); - - return 0; -} -#else -static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data) -{ - return 0; -} -#endif - -int brcmf_fws_init(struct brcmf_pub *drvr) -{ - struct brcmf_fws_info *fws; - struct brcmf_if *ifp; - u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; - int rc; - u32 mode; - - drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); - if (!drvr->fws) { - rc = -ENOMEM; - goto fail; - } - - fws = drvr->fws; - - spin_lock_init(&fws->spinlock); - - /* set linkage back */ - fws->drvr = drvr; - fws->fcmode = fcmode; - - if ((drvr->bus_if->always_use_fws_queue == false) && - (fcmode == BRCMF_FWS_FCMODE_NONE)) { - fws->avoid_queueing = true; - brcmf_dbg(INFO, "FWS queueing will be avoided\n"); - return 0; - } - - fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); - if (fws->fws_wq == NULL) { - brcmf_err("workqueue creation failed\n"); - rc = -EBADF; - goto fail; - } - 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 < 0) { - 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 < 0) { - 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)) { - 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)) - 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) == 0) { - 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) == 0) { - 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); - brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, - BRCMF_FWS_PSQ_LEN); - - /* create debugfs file for statistics */ - brcmf_debugfs_add_entry(drvr, "fws_stats", - brcmf_debugfs_fws_stats_read); - - brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", - fws->fw_signals ? "enabled" : "disabled", tlv); - return 0; - -fail: - brcmf_fws_deinit(drvr); - return rc; -} - -void brcmf_fws_deinit(struct brcmf_pub *drvr) -{ - struct brcmf_fws_info *fws = drvr->fws; - - if (!fws) - return; - - if (drvr->fws->fws_wq) - destroy_workqueue(drvr->fws->fws_wq); - - /* cleanup */ - brcmf_fws_lock(fws); - brcmf_fws_cleanup(fws, -1); - drvr->fws = NULL; - brcmf_fws_unlock(fws); - - /* free top structure */ - kfree(fws); -} - -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 sk_buff *skb) -{ - u32 hslot; - - if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { - brcmu_pkt_buf_free_skb(skb); - return; - } - brcmf_fws_lock(fws); - hslot = brcmf_skb_htod_tag_get_field(skb, 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->fws; - - fws->bus_flow_blocked = flow_blocked; - if (!flow_blocked) - brcmf_fws_schedule_deq(fws); - else - fws->stats.bus_flow_block++; -} |