| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Arend Van Spriel | 9059 | 82.88% | 67 | 67.68% |
| Hante Meuleman | 1623 | 14.85% | 26 | 26.26% |
| Chung-Hsien Hsu | 126 | 1.15% | 1 | 1.01% |
| Wright Feng | 96 | 0.88% | 1 | 1.01% |
| Rafał Miłecki | 16 | 0.15% | 1 | 1.01% |
| Colin Ian King | 6 | 0.05% | 1 | 1.01% |
| Franky Lin | 3 | 0.03% | 1 | 1.01% |
| Arnd Bergmann | 1 | 0.01% | 1 | 1.01% |
| Total | 10930 | 99 |
/* * 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" #include "bcdc.h" #include "common.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 /* 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 #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 init_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 }; #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->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 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; if (fws->fifo_credit[fifo] > fws->init_fifo_credit[fifo]) fws->fifo_credit[fifo] = fws->init_fifo_credit[fifo]; } 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, u8 compcnt) { u32 fifo; u8 cnt = 0; 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 += compcnt; else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { fws->stats.txs_supp_core += compcnt; remove_from_hanger = false; } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { fws->stats.txs_supp_ps += compcnt; remove_from_hanger = false; } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) fws->stats.txs_tossed += compcnt; else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) fws->stats.txs_host_tossed += compcnt; else brcmf_err("unexpected txstatus\n"); while (cnt < compcnt) { 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); goto cont; } skcb = brcmf_skbcb(skb); entry = skcb->mac; if (WARN_ON(!entry)) { brcmu_pkt_buf_free_skb(skb); goto cont; } 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); goto cont; } if (!remove_from_hanger) ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit, seq); if (remove_from_hanger || ret) brcmf_txfinalize(ifp, skb, true); cont: hslot = (hslot + 1) & (BRCMF_FWS_TXSTAT_HSLOT_MASK >> BRCMF_FWS_TXSTAT_HSLOT_SHIFT); if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) seq = (seq + 1) & BRCMF_SKB_HTOD_SEQ_NR_MASK; cnt++; } 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 type, u8 *data) { __le32 status_le; __le16 seq_le; u32 status; u32 hslot; u32 genbit; u8 flags; u16 seq; u8 compcnt; u8 compcnt_offset = BRCMF_FWS_TYPE_TXSTATUS_LEN; 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_TXSTATUS_LEN], sizeof(seq_le)); seq = le16_to_cpu(seq_le); compcnt_offset += BRCMF_FWS_TYPE_SEQ_LEN; } else { seq = 0; } if (type == BRCMF_FWS_TYPE_COMP_TXSTATUS) compcnt = data[compcnt_offset]; else compcnt = 1; fws->stats.txs_indicate += compcnt; brcmf_fws_lock(fws); brcmf_fws_txs_process(fws, flags, hslot, genbit, seq, compcnt); 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 = drvr_to_fws(ifp->drvr); int i; u8 *credits = data; if (e->datalen < BRCMF_FWS_FIFO_COUNT) { brcmf_err("event payload too small (%d)\n", e->datalen); return -EINVAL; } 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++) { fws->fifo_credit[i] += credits[i] - fws->init_fifo_credit[i]; fws->init_fifo_credit[i] = credits[i]; if (fws->fifo_credit[i] > 0) fws->fifo_credit_map |= 1 << i; else fws->fifo_credit_map &= ~(1 << i); WARN_ONCE(fws->fifo_credit[i] < 0, "fifo_credit[%d] is negative(%d)\n", i, fws->fifo_credit[i]); } 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 = drvr_to_fws(ifp->drvr); if (fws) { brcmf_fws_lock(fws); fws->bcmc_credit_check = true; brcmf_fws_unlock(fws); } return 0; } static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi, u8 start, u8 end, struct sk_buff_head *skb_list) { /* initialize return list */ __skb_queue_head_init(skb_list); if (rfi->pend_pkts == 0) { brcmf_dbg(INFO, "no packets in reorder queue\n"); return; } do { if (rfi->pktslots[start]) { __skb_queue_tail(skb_list, rfi->pktslots[start]); rfi->pktslots[start] = NULL; } start++; if (start > rfi->max_idx) start = 0; } while (start != end); rfi->pend_pkts -= skb_queue_len(skb_list); } void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt) { u8 *reorder_data; u8 flow_id, max_idx, cur_idx, exp_idx, end_idx; struct brcmf_ampdu_rx_reorder *rfi; struct sk_buff_head reorder_list; struct sk_buff *pnext; u8 flags; u32 buf_size; reorder_data = ((struct brcmf_skb_reorder_data *)pkt->cb)->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_skb_list(rfi, rfi->exp_idx, rfi->exp_idx, &reorder_list); /* add the last packet */ __skb_queue_tail(&reorder_list, pkt); kfree(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 = kzalloc(buf_size, GFP_ATOMIC); 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 sk_buff **)(rfi + 1); rfi->max_idx = max_idx; } if (flags & BRCMF_RXREORDER_NEW_HOLE) { if (rfi->pend_pkts) { brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, rfi->exp_idx, &reorder_list); WARN_ON(rfi->pend_pkts); } else { __skb_queue_head_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_skb(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_skb(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_skb_list(rfi, cur_idx, exp_idx, &reorder_list); brcmf_dbg(DATA, "flow-%d: freeing buffers %d, pending %d\n", flow_id, skb_queue_len(&reorder_list), rfi->pend_pkts); } else { u8 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_skb_list(rfi, rfi->exp_idx, end_idx, &reorder_list); if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) { __skb_queue_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_skb_list(rfi, rfi->exp_idx, end_idx, &reorder_list); __skb_queue_tail(&reorder_list, pkt); /* set the new expected idx */ rfi->exp_idx = exp_idx; } netif_rx: skb_queue_walk_safe(&reorder_list, pkt, pnext) { __skb_unlink(pkt, &reorder_list); brcmf_netif_rx(ifp, pkt); } } 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 = drvr_to_fws(ifp->drvr); 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_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: case BRCMF_FWS_TYPE_COMP_TXSTATUS: brcmf_fws_txstatus_indicate(fws, type, 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, 1); } 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] > 0) { 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_fws_info *fws = drvr_to_fws(ifp->drvr); 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)); /* 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: 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_skbs(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 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] > 0) || ((!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 = &(drvr_to_fws(bus_if->drvr)->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 struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr) { struct brcmf_fws_info *fws; struct brcmf_if *ifp; u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; int rc; u32 mode; fws = kzalloc(sizeof(*fws), GFP_KERNEL); if (!fws) { rc = -ENOMEM; goto fail; } spin_lock_init(&fws->spinlock); /* store drvr reference */ fws->drvr = drvr; 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"); return fws; } 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); 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); return fws; fail: brcmf_fws_detach(fws); return ERR_PTR(rc); } void brcmf_fws_detach(struct brcmf_fws_info *fws) { if (!fws) return; if (fws->fws_wq) destroy_workqueue(fws->fws_wq); /* cleanup */ brcmf_fws_lock(fws); brcmf_fws_cleanup(fws, -1); brcmf_fws_unlock(fws); /* free top structure */ kfree(fws); } void brcmf_fws_debugfs_create(struct brcmf_pub *drvr) { /* create debugfs file for statistics */ brcmf_debugfs_add_entry(drvr, "fws_stats", brcmf_debugfs_fws_stats_read); } bool brcmf_fws_queue_skbs(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 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, 1); 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++; } }
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