| /* |
| * 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 "dhd.h" |
| #include "dhd_dbg.h" |
| #include "dhd_bus.h" |
| #include "fwil.h" |
| #include "fwil_types.h" |
| #include "fweh.h" |
| #include "fwsignal.h" |
| #include "p2p.h" |
| #include "wl_cfg80211.h" |
| #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_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; |
| }; |
| |
| /* |
| * 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 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 = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; |
| |
| 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; |
| u8 ifidx; |
| |
| 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; |
| |
| ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); |
| if (ret == 0) { |
| 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 or hdrpull failed, 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; |
| |
| 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); |
| |
| if (!remove_from_hanger) |
| ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit, |
| seq); |
| |
| if (remove_from_hanger || ret) |
| brcmf_txfinalize(fws->drvr, skb, true); |
| |
| return 0; |
| } |
| |
| static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, |
| u8 *data) |
| { |
| int i; |
| |
| if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { |
| brcmf_dbg(INFO, "ignored\n"); |
| return BRCMF_FWS_RET_OK_NOSCHEDULE; |
| } |
| |
| brcmf_dbg(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; |
| } |
| |
| int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, |
| struct sk_buff *skb) |
| { |
| struct brcmf_skb_reorder_data *rd; |
| struct brcmf_fws_info *fws = 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", |
| ifidx, skb->len, signal_len); |
| |
| WARN_ON(signal_len > skb->len); |
| |
| if (!signal_len) |
| return 0; |
| /* if flow control disabled, skip to packet data and leave */ |
| if (!fws->fw_signals) { |
| skb_pull(skb, signal_len); |
| return 0; |
| } |
| |
| fws->stats.header_pulls++; |
| data_len = signal_len; |
| signal_data = skb->data; |
| |
| status = BRCMF_FWS_RET_OK_NOSCHEDULE; |
| while (data_len > 0) { |
| /* extract tlv info */ |
| type = signal_data[0]; |
| |
| /* FILLER type is actually not a TLV, but |
| * a single byte that can be skipped. |
| */ |
| if (type == BRCMF_FWS_TYPE_FILLER) { |
| signal_data += 1; |
| data_len -= 1; |
| continue; |
| } |
| len = signal_data[1]; |
| data = signal_data + 2; |
| |
| brcmf_dbg(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, signal_len); |
| |
| /* this may be a signal-only packet |
| */ |
| if (skb->len == 0) |
| fws->stats.header_only_pkt++; |
| |
| return 0; |
| } |
| |
| 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--; |
| brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); |
| 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); |
| bool pae = eh->h_proto == htons(ETH_P_PAE); |
| |
| brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto)); |
| /* determine the priority */ |
| if (!skb->priority) |
| skb->priority = cfg80211_classify8021d(skb); |
| |
| drvr->tx_multicast += !!multicast; |
| if (pae) |
| atomic_inc(&ifp->pend_8021x_cnt); |
| |
| /* 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"); |
| if (pae) { |
| atomic_dec(&ifp->pend_8021x_cnt); |
| if (waitqueue_active(&ifp->pend_8021x_wait)) |
| wake_up(&ifp->pend_8021x_wait); |
| } |
| brcmu_pkt_buf_free_skb(skb); |
| } |
| brcmf_fws_unlock(fws); |
| return 0; |
| } |
| |
| void brcmf_fws_reset_interface(struct brcmf_if *ifp) |
| { |
| struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; |
| |
| brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); |
| if (!entry) |
| return; |
| |
| brcmf_fws_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(drvr, 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); |
| } |
| |
| int brcmf_fws_init(struct brcmf_pub *drvr) |
| { |
| struct brcmf_fws_info *fws; |
| 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; |
| |
| 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; |
| if (brcmf_fil_iovar_int_set(drvr->iflist[0], "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(drvr->iflist[0], "ampdu_hostreorder", 1)) |
| brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n"); |
| |
| /* Enable seq number reuse, if supported */ |
| if (brcmf_fil_iovar_int_get(drvr->iflist[0], "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(drvr->iflist[0], |
| "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_create_fws_stats(drvr, &fws->stats); |
| |
| 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++; |
| } |