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1// SPDX-License-Identifier: ISC2/*3 * Copyright (c) 2010 Broadcom Corporation4 */5#include <linux/types.h>6#include <linux/module.h>7#include <linux/if_ether.h>8#include <linux/spinlock.h>9#include <linux/skbuff.h>10#include <linux/netdevice.h>11#include <linux/etherdevice.h>12#include <linux/err.h>13#include <linux/jiffies.h>14#include <net/cfg80211.h>15 16#include <brcmu_utils.h>17#include <brcmu_wifi.h>18#include "core.h"19#include "debug.h"20#include "bus.h"21#include "fwil.h"22#include "fwil_types.h"23#include "fweh.h"24#include "fwsignal.h"25#include "p2p.h"26#include "cfg80211.h"27#include "proto.h"28#include "bcdc.h"29#include "common.h"30 31/**32 * DOC: Firmware Signalling33 *34 * Firmware can send signals to host and vice versa, which are passed in the35 * data packets using TLV based header. This signalling layer is on top of the36 * BDC bus protocol layer.37 */38 39/*40 * single definition for firmware-driver flow control tlv's.41 *42 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).43 * A length value 0 indicates variable length tlv.44 */45#define BRCMF_FWS_TLV_DEFLIST \46 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \47 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \48 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \49 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \50 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \51 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \52 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \53 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \54 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \55 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \56 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \57 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \58 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \59 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \60 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \61 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \62 BRCMF_FWS_TLV_DEF(FILLER, 255, 0)63 64/*65 * enum brcmf_fws_tlv_type - definition of tlv identifiers.66 */67#define BRCMF_FWS_TLV_DEF(name, id, len) \68 BRCMF_FWS_TYPE_ ## name = id,69enum brcmf_fws_tlv_type {70 BRCMF_FWS_TLV_DEFLIST71 BRCMF_FWS_TYPE_INVALID72};73#undef BRCMF_FWS_TLV_DEF74 75/*76 * enum brcmf_fws_tlv_len - definition of tlv lengths.77 */78#define BRCMF_FWS_TLV_DEF(name, id, len) \79 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),80enum brcmf_fws_tlv_len {81 BRCMF_FWS_TLV_DEFLIST82};83#undef BRCMF_FWS_TLV_DEF84 85/* AMPDU rx reordering definitions */86#define BRCMF_RXREORDER_FLOWID_OFFSET 087#define BRCMF_RXREORDER_MAXIDX_OFFSET 288#define BRCMF_RXREORDER_FLAGS_OFFSET 489#define BRCMF_RXREORDER_CURIDX_OFFSET 690#define BRCMF_RXREORDER_EXPIDX_OFFSET 891 92#define BRCMF_RXREORDER_DEL_FLOW 0x0193#define BRCMF_RXREORDER_FLUSH_ALL 0x0294#define BRCMF_RXREORDER_CURIDX_VALID 0x0495#define BRCMF_RXREORDER_EXPIDX_VALID 0x0896#define BRCMF_RXREORDER_NEW_HOLE 0x1097 98#ifdef DEBUG99/*100 * brcmf_fws_tlv_names - array of tlv names.101 */102#define BRCMF_FWS_TLV_DEF(name, id, len) \103 { id, #name },104static struct {105 enum brcmf_fws_tlv_type id;106 const char *name;107} brcmf_fws_tlv_names[] = {108 BRCMF_FWS_TLV_DEFLIST109};110#undef BRCMF_FWS_TLV_DEF111 112 113static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)114{115 int i;116 117 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)118 if (brcmf_fws_tlv_names[i].id == id)119 return brcmf_fws_tlv_names[i].name;120 121 return "INVALID";122}123#else124static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)125{126 return "NODEBUG";127}128#endif /* DEBUG */129 130/*131 * The PKTTAG tlv has additional bytes when firmware-signalling132 * mode has REUSESEQ flag set.133 */134#define BRCMF_FWS_TYPE_SEQ_LEN 2135 136/*137 * flags used to enable tlv signalling from firmware.138 */139#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001140#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002141#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004142#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008143#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010144#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020145#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040146 147#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32148#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff149 150#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0151#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1152#define BRCMF_FWS_FLOWCONTROL_HIWATER 128153#define BRCMF_FWS_FLOWCONTROL_LOWATER 64154 155#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)156#define BRCMF_FWS_PSQ_LEN 256157 158#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01159#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02160 161#define BRCMF_FWS_RET_OK_NOSCHEDULE 0162#define BRCMF_FWS_RET_OK_SCHEDULE 1163 164#define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */165#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \166 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \167 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))168#define BRCMF_FWS_MODE_GET_REUSESEQ(x) \169 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)170 171/**172 * enum brcmf_fws_skb_state - indicates processing state of skb.173 *174 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.175 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.176 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.177 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.178 */179enum brcmf_fws_skb_state {180 BRCMF_FWS_SKBSTATE_NEW,181 BRCMF_FWS_SKBSTATE_DELAYED,182 BRCMF_FWS_SKBSTATE_SUPPRESSED,183 BRCMF_FWS_SKBSTATE_TIM184};185 186/**187 * struct brcmf_skbuff_cb - control buffer associated with skbuff.188 *189 * @bus_flags: 2 bytes reserved for bus specific parameters190 * @if_flags: holds interface index and packet related flags.191 * @htod: host to device packet identifier (used in PKTTAG tlv).192 * @htod_seq: this 16-bit is original seq number for every suppress packet.193 * @state: transmit state of the packet.194 * @mac: descriptor related to destination for this packet.195 *196 * This information is stored in control buffer struct sk_buff::cb, which197 * provides 48 bytes of storage so this structure should not exceed that.198 */199struct brcmf_skbuff_cb {200 u16 bus_flags;201 u16 if_flags;202 u32 htod;203 u16 htod_seq;204 enum brcmf_fws_skb_state state;205 struct brcmf_fws_mac_descriptor *mac;206};207 208/*209 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.210 */211#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))212 213/*214 * sk_buff control if flags215 *216 * b[11] - packet sent upon firmware request.217 * b[10] - packet only contains signalling data.218 * b[9] - packet is a tx packet.219 * b[8] - packet used requested credit220 * b[7] - interface in AP mode.221 * b[3:0] - interface index.222 */223#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800224#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11225#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400226#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10227#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200228#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9229#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100230#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8231#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080232#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7233#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f234#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0235 236#define brcmf_skb_if_flags_set_field(skb, field, value) \237 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \238 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \239 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))240#define brcmf_skb_if_flags_get_field(skb, field) \241 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \242 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \243 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)244 245/*246 * sk_buff control packet identifier247 *248 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.249 *250 * - Generated at the host (e.g. dhd)251 * - Seen as a generic sequence number by firmware except for the flags field.252 *253 * Generation : b[31] => generation number for this packet [host->fw]254 * OR, current generation number [fw->host]255 * Flags : b[30:27] => command, status flags256 * FIFO-AC : b[26:24] => AC-FIFO id257 * h-slot : b[23:8] => hanger-slot258 * freerun : b[7:0] => A free running counter259 */260#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000261#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31262#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000263#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27264#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000265#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24266#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00267#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8268#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff269#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0270 271#define brcmf_skb_htod_tag_set_field(skb, field, value) \272 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \273 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \274 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))275#define brcmf_skb_htod_tag_get_field(skb, field) \276 brcmu_maskget32(brcmf_skbcb(skb)->htod, \277 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \278 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)279 280#define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000281#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13282#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000283#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12284#define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff285#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0286 287#define brcmf_skb_htod_seq_set_field(skb, field, value) \288 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \289 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \290 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))291#define brcmf_skb_htod_seq_get_field(skb, field) \292 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \293 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \294 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)295 296#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000297#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31298#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000299#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27300#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000301#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24302#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00303#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8304#define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF305#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0306 307#define brcmf_txstatus_get_field(txs, field) \308 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \309 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)310 311/* How long to defer borrowing in jiffies */312#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)313 314 315/**316 * enum brcmf_fws_txstatus - txstatus flag values.317 *318 * @BRCMF_FWS_TXSTATUS_DISCARD:319 * host is free to discard the packet.320 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:321 * 802.11 core suppressed the packet.322 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:323 * firmware suppress the packet as device is already in PS mode.324 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:325 * firmware tossed the packet.326 * @BRCMF_FWS_TXSTATUS_FW_DISCARD_NOACK:327 * firmware tossed the packet after retries.328 * @BRCMF_FWS_TXSTATUS_FW_SUPPRESS_ACKED:329 * firmware wrongly reported suppressed previously, now fixing to acked.330 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:331 * host tossed the packet.332 */333enum brcmf_fws_txstatus {334 BRCMF_FWS_TXSTATUS_DISCARD,335 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,336 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,337 BRCMF_FWS_TXSTATUS_FW_TOSSED,338 BRCMF_FWS_TXSTATUS_FW_DISCARD_NOACK,339 BRCMF_FWS_TXSTATUS_FW_SUPPRESS_ACKED,340 BRCMF_FWS_TXSTATUS_HOST_TOSSED341};342 343enum brcmf_fws_fcmode {344 BRCMF_FWS_FCMODE_NONE,345 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,346 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT347};348 349enum brcmf_fws_mac_desc_state {350 BRCMF_FWS_STATE_OPEN = 1,351 BRCMF_FWS_STATE_CLOSE352};353 354/**355 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface356 *357 * @name: name of the descriptor.358 * @occupied: slot is in use.359 * @mac_handle: handle for mac entry determined by firmware.360 * @interface_id: interface index.361 * @state: current state.362 * @suppressed: mac entry is suppressed.363 * @generation: generation bit.364 * @ac_bitmap: ac queue bitmap.365 * @requested_credit: credits requested by firmware.366 * @requested_packet: packet requested by firmware.367 * @ea: ethernet address.368 * @seq: per-node free-running sequence.369 * @psq: power-save queue.370 * @transit_count: packet in transit to firmware.371 * @suppr_transit_count: suppressed packet in transit to firmware.372 * @send_tim_signal: if set tim signal will be sent.373 * @traffic_pending_bmp: traffic pending bitmap.374 * @traffic_lastreported_bmp: traffic last reported bitmap.375 */376struct brcmf_fws_mac_descriptor {377 char name[16];378 u8 occupied;379 u8 mac_handle;380 u8 interface_id;381 u8 state;382 bool suppressed;383 u8 generation;384 u8 ac_bitmap;385 u8 requested_credit;386 u8 requested_packet;387 u8 ea[ETH_ALEN];388 u8 seq[BRCMF_FWS_FIFO_COUNT];389 struct pktq psq;390 int transit_count;391 int suppr_transit_count;392 bool send_tim_signal;393 u8 traffic_pending_bmp;394 u8 traffic_lastreported_bmp;395};396 397#define BRCMF_FWS_HANGER_MAXITEMS 3072398#define BRCMF_BORROW_RATIO 3399 400/**401 * enum brcmf_fws_hanger_item_state - state of hanger item.402 *403 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.404 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.405 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.406 */407enum brcmf_fws_hanger_item_state {408 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,409 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,410 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED411};412 413 414/**415 * struct brcmf_fws_hanger_item - single entry for tx pending packet.416 *417 * @state: entry is either free or occupied.418 * @pkt: packet itself.419 */420struct brcmf_fws_hanger_item {421 enum brcmf_fws_hanger_item_state state;422 struct sk_buff *pkt;423};424 425/**426 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.427 *428 * @pushed: packets pushed to await txstatus.429 * @popped: packets popped upon handling txstatus.430 * @failed_to_push: packets that could not be pushed.431 * @failed_to_pop: packets that could not be popped.432 * @failed_slotfind: packets for which failed to find an entry.433 * @slot_pos: last returned item index for a free entry.434 * @items: array of hanger items.435 */436struct brcmf_fws_hanger {437 u32 pushed;438 u32 popped;439 u32 failed_to_push;440 u32 failed_to_pop;441 u32 failed_slotfind;442 u32 slot_pos;443 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];444};445 446struct brcmf_fws_macdesc_table {447 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];448 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];449 struct brcmf_fws_mac_descriptor other;450};451 452struct brcmf_fws_stats {453 u32 tlv_parse_failed;454 u32 tlv_invalid_type;455 u32 header_only_pkt;456 u32 header_pulls;457 u32 pkt2bus;458 u32 send_pkts[5];459 u32 requested_sent[5];460 u32 generic_error;461 u32 mac_update_failed;462 u32 mac_ps_update_failed;463 u32 if_update_failed;464 u32 packet_request_failed;465 u32 credit_request_failed;466 u32 rollback_success;467 u32 rollback_failed;468 u32 delayq_full_error;469 u32 supprq_full_error;470 u32 txs_indicate;471 u32 txs_discard;472 u32 txs_supp_core;473 u32 txs_supp_ps;474 u32 txs_tossed;475 u32 txs_host_tossed;476 u32 bus_flow_block;477 u32 fws_flow_block;478};479 480struct brcmf_fws_info {481 struct brcmf_pub *drvr;482 spinlock_t spinlock;483 ulong flags;484 struct brcmf_fws_stats stats;485 struct brcmf_fws_hanger hanger;486 enum brcmf_fws_fcmode fcmode;487 bool fw_signals;488 bool bcmc_credit_check;489 struct brcmf_fws_macdesc_table desc;490 struct workqueue_struct *fws_wq;491 struct work_struct fws_dequeue_work;492 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];493 int fifo_credit[BRCMF_FWS_FIFO_COUNT];494 int init_fifo_credit[BRCMF_FWS_FIFO_COUNT];495 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]496 [BRCMF_FWS_FIFO_AC_VO + 1];497 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];498 u32 fifo_credit_map;499 u32 fifo_delay_map;500 unsigned long borrow_defer_timestamp;501 bool bus_flow_blocked;502 bool creditmap_received;503 u8 mode;504 bool avoid_queueing;505};506 507#define BRCMF_FWS_TLV_DEF(name, id, len) \508 case BRCMF_FWS_TYPE_ ## name: \509 return len;510 511/**512 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.513 *514 * @fws: firmware-signalling information.515 * @id: identifier of the TLV.516 *517 * Return: the specified length for the given TLV; Otherwise -EINVAL.518 */519static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,520 enum brcmf_fws_tlv_type id)521{522 switch (id) {523 BRCMF_FWS_TLV_DEFLIST524 default:525 fws->stats.tlv_invalid_type++;526 break;527 }528 return -EINVAL;529}530#undef BRCMF_FWS_TLV_DEF531 532static void brcmf_fws_lock(struct brcmf_fws_info *fws)533 __acquires(&fws->spinlock)534{535 spin_lock_irqsave(&fws->spinlock, fws->flags);536}537 538static void brcmf_fws_unlock(struct brcmf_fws_info *fws)539 __releases(&fws->spinlock)540{541 spin_unlock_irqrestore(&fws->spinlock, fws->flags);542}543 544static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)545{546 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);547 return ifidx == *(int *)arg;548}549 550static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)551{552 int i;553 554 memset(hanger, 0, sizeof(*hanger));555 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)556 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;557}558 559static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)560{561 u32 i;562 563 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;564 565 while (i != h->slot_pos) {566 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {567 h->slot_pos = i;568 goto done;569 }570 i++;571 if (i == BRCMF_FWS_HANGER_MAXITEMS)572 i = 0;573 }574 brcmf_err("all slots occupied\n");575 h->failed_slotfind++;576 i = BRCMF_FWS_HANGER_MAXITEMS;577done:578 return i;579}580 581static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,582 struct sk_buff *pkt, u32 slot_id)583{584 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)585 return -ENOENT;586 587 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {588 brcmf_err("slot is not free\n");589 h->failed_to_push++;590 return -EINVAL;591 }592 593 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;594 h->items[slot_id].pkt = pkt;595 h->pushed++;596 return 0;597}598 599static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,600 u32 slot_id, struct sk_buff **pktout,601 bool remove_item)602{603 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)604 return -ENOENT;605 606 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {607 brcmf_err("entry not in use\n");608 h->failed_to_pop++;609 return -EINVAL;610 }611 612 *pktout = h->items[slot_id].pkt;613 if (remove_item) {614 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;615 h->items[slot_id].pkt = NULL;616 h->popped++;617 }618 return 0;619}620 621static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,622 int ifidx)623{624 struct brcmf_fws_hanger_item *hi;625 bool (*matchfn)(struct sk_buff *, void *) = NULL;626 struct sk_buff *skb;627 int prec;628 u32 hslot;629 630 if (ifidx != -1)631 matchfn = brcmf_fws_ifidx_match;632 for (prec = 0; prec < q->num_prec; prec++) {633 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);634 while (skb) {635 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);636 hi = &fws->hanger.items[hslot];637 WARN_ON(skb != hi->pkt);638 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;639 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,640 true);641 brcmu_pkt_buf_free_skb(skb);642 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);643 }644 }645}646 647static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,648 u32 slot_id)649{650 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)651 return -ENOENT;652 653 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {654 brcmf_err("entry not in use\n");655 return -EINVAL;656 }657 658 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;659 return 0;660}661 662static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,663 bool (*fn)(struct sk_buff *, void *),664 int ifidx)665{666 struct brcmf_fws_hanger *h = &fws->hanger;667 struct sk_buff *skb;668 int i;669 enum brcmf_fws_hanger_item_state s;670 671 for (i = 0; i < ARRAY_SIZE(h->items); i++) {672 s = h->items[i].state;673 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||674 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {675 skb = h->items[i].pkt;676 if (fn == NULL || fn(skb, &ifidx)) {677 /* suppress packets freed from psq */678 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)679 brcmu_pkt_buf_free_skb(skb);680 h->items[i].state =681 BRCMF_FWS_HANGER_ITEM_STATE_FREE;682 }683 }684 }685}686 687static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,688 struct brcmf_fws_mac_descriptor *desc)689{690 if (desc == &fws->desc.other)691 strscpy(desc->name, "MAC-OTHER", sizeof(desc->name));692 else if (desc->mac_handle)693 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",694 desc->mac_handle, desc->interface_id);695 else696 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",697 desc->interface_id);698}699 700static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,701 u8 *addr, u8 ifidx)702{703 brcmf_dbg(TRACE,704 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);705 desc->occupied = 1;706 desc->state = BRCMF_FWS_STATE_OPEN;707 desc->requested_credit = 0;708 desc->requested_packet = 0;709 /* depending on use may need ifp->bsscfgidx instead */710 desc->interface_id = ifidx;711 desc->ac_bitmap = 0xff; /* update this when handling APSD */712 if (addr)713 memcpy(&desc->ea[0], addr, ETH_ALEN);714}715 716static717void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)718{719 brcmf_dbg(TRACE,720 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);721 desc->occupied = 0;722 desc->state = BRCMF_FWS_STATE_CLOSE;723 desc->requested_credit = 0;724 desc->requested_packet = 0;725}726 727static struct brcmf_fws_mac_descriptor *728brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)729{730 struct brcmf_fws_mac_descriptor *entry;731 int i;732 733 if (ea == NULL)734 return ERR_PTR(-EINVAL);735 736 entry = &fws->desc.nodes[0];737 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {738 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))739 return entry;740 entry++;741 }742 743 return ERR_PTR(-ENOENT);744}745 746static struct brcmf_fws_mac_descriptor*747brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)748{749 struct brcmf_fws_mac_descriptor *entry;750 bool multicast;751 752 multicast = is_multicast_ether_addr(da);753 754 /* Multicast destination, STA and P2P clients get the interface entry.755 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations756 * have their own entry.757 */758 if (multicast && ifp->fws_desc) {759 entry = ifp->fws_desc;760 goto done;761 }762 763 entry = brcmf_fws_macdesc_lookup(fws, da);764 if (IS_ERR(entry))765 entry = ifp->fws_desc;766 767done:768 return entry;769}770 771static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,772 struct brcmf_fws_mac_descriptor *entry,773 int fifo)774{775 struct brcmf_fws_mac_descriptor *if_entry;776 bool closed;777 778 /* for unique destination entries the related interface779 * may be closed.780 */781 if (entry->mac_handle) {782 if_entry = &fws->desc.iface[entry->interface_id];783 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)784 return true;785 }786 /* an entry is closed when the state is closed and787 * the firmware did not request anything.788 */789 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&790 !entry->requested_credit && !entry->requested_packet;791 792 /* Or firmware does not allow traffic for given fifo */793 return closed || !(entry->ac_bitmap & BIT(fifo));794}795 796static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,797 struct brcmf_fws_mac_descriptor *entry,798 int ifidx)799{800 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {801 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);802 entry->occupied = !!(entry->psq.len);803 }804}805 806static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,807 bool (*fn)(struct sk_buff *, void *),808 int ifidx)809{810 struct brcmf_fws_hanger_item *hi;811 struct pktq *txq;812 struct sk_buff *skb;813 int prec;814 u32 hslot;815 816 txq = brcmf_bus_gettxq(fws->drvr->bus_if);817 if (IS_ERR(txq)) {818 brcmf_dbg(TRACE, "no txq to clean up\n");819 return;820 }821 822 for (prec = 0; prec < txq->num_prec; prec++) {823 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);824 while (skb) {825 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);826 hi = &fws->hanger.items[hslot];827 WARN_ON(skb != hi->pkt);828 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;829 brcmu_pkt_buf_free_skb(skb);830 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);831 }832 }833}834 835static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)836{837 int i;838 struct brcmf_fws_mac_descriptor *table;839 bool (*matchfn)(struct sk_buff *, void *) = NULL;840 841 if (fws == NULL)842 return;843 844 if (ifidx != -1)845 matchfn = brcmf_fws_ifidx_match;846 847 /* cleanup individual nodes */848 table = &fws->desc.nodes[0];849 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)850 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);851 852 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);853 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);854 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);855}856 857static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)858{859 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;860 u8 *wlh;861 u16 data_offset = 0;862 u8 fillers;863 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);864 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);865 866 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",867 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),868 (le32_to_cpu(pkttag) >> 8) & 0xffff,869 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);870 if (entry->send_tim_signal)871 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;872 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))873 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;874 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */875 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;876 fillers = round_up(data_offset, 4) - data_offset;877 data_offset += fillers;878 879 skb_push(skb, data_offset);880 wlh = skb->data;881 882 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;883 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;884 memcpy(&wlh[2], &pkttag, sizeof(pkttag));885 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {886 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;887 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,888 sizeof(pktseq));889 }890 wlh += wlh[1] + 2;891 892 if (entry->send_tim_signal) {893 entry->send_tim_signal = false;894 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;895 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;896 wlh[2] = entry->mac_handle;897 wlh[3] = entry->traffic_pending_bmp;898 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",899 entry->mac_handle, entry->traffic_pending_bmp);900 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;901 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;902 }903 if (fillers)904 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);905 906 return (u8)(data_offset >> 2);907}908 909static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,910 struct brcmf_fws_mac_descriptor *entry,911 int fifo, bool send_immediately)912{913 struct sk_buff *skb;914 struct brcmf_skbuff_cb *skcb;915 s32 err;916 u32 len;917 u8 data_offset;918 int ifidx;919 920 /* check delayedQ and suppressQ in one call using bitmap */921 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)922 entry->traffic_pending_bmp &= ~NBITVAL(fifo);923 else924 entry->traffic_pending_bmp |= NBITVAL(fifo);925 926 entry->send_tim_signal = false;927 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)928 entry->send_tim_signal = true;929 if (send_immediately && entry->send_tim_signal &&930 entry->state == BRCMF_FWS_STATE_CLOSE) {931 /* create a dummy packet and sent that. The traffic */932 /* bitmap info will automatically be attached to that packet */933 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +934 BRCMF_FWS_TYPE_SEQ_LEN +935 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +936 4 + fws->drvr->hdrlen;937 skb = brcmu_pkt_buf_get_skb(len);938 if (skb == NULL)939 return false;940 skb_pull(skb, len);941 skcb = brcmf_skbcb(skb);942 skcb->mac = entry;943 skcb->state = BRCMF_FWS_SKBSTATE_TIM;944 skcb->htod = 0;945 skcb->htod_seq = 0;946 data_offset = brcmf_fws_hdrpush(fws, skb);947 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);948 brcmf_fws_unlock(fws);949 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);950 brcmf_fws_lock(fws);951 if (err)952 brcmu_pkt_buf_free_skb(skb);953 return true;954 }955 return false;956}957 958static void959brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,960 u8 if_id)961{962 struct brcmf_if *ifp = brcmf_get_ifp(fws->drvr, if_id);963 964 if (WARN_ON(!ifp))965 return;966 967 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&968 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)969 brcmf_txflowblock_if(ifp,970 BRCMF_NETIF_STOP_REASON_FWS_FC, false);971 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&972 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {973 fws->stats.fws_flow_block++;974 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);975 }976 return;977}978 979static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)980{981 brcmf_dbg(CTL, "rssi %d\n", rssi);982 return 0;983}984 985static986int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)987{988 struct brcmf_fws_mac_descriptor *entry, *existing;989 u8 mac_handle;990 u8 ifidx;991 u8 *addr;992 993 mac_handle = *data++;994 ifidx = *data++;995 addr = data;996 997 entry = &fws->desc.nodes[mac_handle & 0x1F];998 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {999 if (entry->occupied) {1000 brcmf_dbg(TRACE, "deleting %s mac %pM\n",1001 entry->name, addr);1002 brcmf_fws_lock(fws);1003 brcmf_fws_macdesc_cleanup(fws, entry, -1);1004 brcmf_fws_macdesc_deinit(entry);1005 brcmf_fws_unlock(fws);1006 } else1007 fws->stats.mac_update_failed++;1008 return 0;1009 }1010 1011 existing = brcmf_fws_macdesc_lookup(fws, addr);1012 if (IS_ERR(existing)) {1013 if (!entry->occupied) {1014 brcmf_fws_lock(fws);1015 entry->mac_handle = mac_handle;1016 brcmf_fws_macdesc_init(entry, addr, ifidx);1017 brcmf_fws_macdesc_set_name(fws, entry);1018 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,1019 BRCMF_FWS_PSQ_LEN);1020 brcmf_fws_unlock(fws);1021 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);1022 } else {1023 fws->stats.mac_update_failed++;1024 }1025 } else {1026 if (entry != existing) {1027 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);1028 brcmf_fws_lock(fws);1029 memcpy(entry, existing,1030 offsetof(struct brcmf_fws_mac_descriptor, psq));1031 entry->mac_handle = mac_handle;1032 brcmf_fws_macdesc_deinit(existing);1033 brcmf_fws_macdesc_set_name(fws, entry);1034 brcmf_fws_unlock(fws);1035 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,1036 addr);1037 } else {1038 brcmf_dbg(TRACE, "use existing\n");1039 WARN_ON(entry->mac_handle != mac_handle);1040 /* TODO: what should we do here: continue, reinit, .. */1041 }1042 }1043 return 0;1044}1045 1046static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,1047 u8 type, u8 *data)1048{1049 struct brcmf_fws_mac_descriptor *entry;1050 u8 mac_handle;1051 int ret;1052 1053 mac_handle = data[0];1054 entry = &fws->desc.nodes[mac_handle & 0x1F];1055 if (!entry->occupied) {1056 fws->stats.mac_ps_update_failed++;1057 return -ESRCH;1058 }1059 brcmf_fws_lock(fws);1060 /* a state update should wipe old credits */1061 entry->requested_credit = 0;1062 entry->requested_packet = 0;1063 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {1064 entry->state = BRCMF_FWS_STATE_OPEN;1065 ret = BRCMF_FWS_RET_OK_SCHEDULE;1066 } else {1067 entry->state = BRCMF_FWS_STATE_CLOSE;1068 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);1069 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);1070 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);1071 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);1072 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;1073 }1074 brcmf_fws_unlock(fws);1075 return ret;1076}1077 1078static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,1079 u8 type, u8 *data)1080{1081 struct brcmf_fws_mac_descriptor *entry;1082 u8 ifidx;1083 int ret;1084 1085 ifidx = data[0];1086 1087 if (ifidx >= BRCMF_MAX_IFS) {1088 ret = -ERANGE;1089 goto fail;1090 }1091 1092 entry = &fws->desc.iface[ifidx];1093 if (!entry->occupied) {1094 ret = -ESRCH;1095 goto fail;1096 }1097 1098 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,1099 entry->name);1100 brcmf_fws_lock(fws);1101 switch (type) {1102 case BRCMF_FWS_TYPE_INTERFACE_OPEN:1103 entry->state = BRCMF_FWS_STATE_OPEN;1104 ret = BRCMF_FWS_RET_OK_SCHEDULE;1105 break;1106 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:1107 entry->state = BRCMF_FWS_STATE_CLOSE;1108 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;1109 break;1110 default:1111 ret = -EINVAL;1112 brcmf_fws_unlock(fws);1113 goto fail;1114 }1115 brcmf_fws_unlock(fws);1116 return ret;1117 1118fail:1119 fws->stats.if_update_failed++;1120 return ret;1121}1122 1123static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,1124 u8 *data)1125{1126 struct brcmf_fws_mac_descriptor *entry;1127 1128 entry = &fws->desc.nodes[data[1] & 0x1F];1129 if (!entry->occupied) {1130 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)1131 fws->stats.credit_request_failed++;1132 else1133 fws->stats.packet_request_failed++;1134 return -ESRCH;1135 }1136 1137 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",1138 brcmf_fws_get_tlv_name(type), type, entry->name,1139 data[0], data[2]);1140 brcmf_fws_lock(fws);1141 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)1142 entry->requested_credit = data[0];1143 else1144 entry->requested_packet = data[0];1145 1146 entry->ac_bitmap = data[2];1147 brcmf_fws_unlock(fws);1148 return BRCMF_FWS_RET_OK_SCHEDULE;1149}1150 1151static void1152brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,1153 struct sk_buff *skb)1154{1155 if (entry->requested_credit > 0) {1156 entry->requested_credit--;1157 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);1158 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);1159 if (entry->state != BRCMF_FWS_STATE_CLOSE)1160 brcmf_err("requested credit set while mac not closed!\n");1161 } else if (entry->requested_packet > 0) {1162 entry->requested_packet--;1163 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);1164 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);1165 if (entry->state != BRCMF_FWS_STATE_CLOSE)1166 brcmf_err("requested packet set while mac not closed!\n");1167 } else {1168 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);1169 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);1170 }1171}1172 1173static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)1174{1175 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;1176 1177 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&1178 (entry->state == BRCMF_FWS_STATE_CLOSE))1179 entry->requested_credit++;1180}1181 1182static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,1183 u8 fifo, u8 credits)1184{1185 int lender_ac;1186 int *borrowed;1187 int *fifo_credit;1188 1189 if (!credits)1190 return;1191 1192 fws->fifo_credit_map |= 1 << fifo;1193 1194 if (fifo > BRCMF_FWS_FIFO_AC_BK &&1195 fifo <= BRCMF_FWS_FIFO_AC_VO) {1196 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;1197 lender_ac--) {1198 borrowed = &fws->credits_borrowed[fifo][lender_ac];1199 if (*borrowed) {1200 fws->fifo_credit_map |= (1 << lender_ac);1201 fifo_credit = &fws->fifo_credit[lender_ac];1202 if (*borrowed >= credits) {1203 *borrowed -= credits;1204 *fifo_credit += credits;1205 return;1206 } else {1207 credits -= *borrowed;1208 *fifo_credit += *borrowed;1209 *borrowed = 0;1210 }1211 }1212 }1213 }1214 1215 if (credits) {1216 fws->fifo_credit[fifo] += credits;1217 }1218 1219 if (fws->fifo_credit[fifo] > fws->init_fifo_credit[fifo])1220 fws->fifo_credit[fifo] = fws->init_fifo_credit[fifo];1221 1222}1223 1224static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)1225{1226 /* only schedule dequeue when there are credits for delayed traffic */1227 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||1228 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))1229 queue_work(fws->fws_wq, &fws->fws_dequeue_work);1230}1231 1232static int brcmf_fws_enq(struct brcmf_fws_info *fws,1233 enum brcmf_fws_skb_state state, int fifo,1234 struct sk_buff *p)1235{1236 struct brcmf_pub *drvr = fws->drvr;1237 int prec = 2 * fifo;1238 u32 *qfull_stat = &fws->stats.delayq_full_error;1239 struct brcmf_fws_mac_descriptor *entry;1240 struct pktq *pq;1241 struct sk_buff_head *queue;1242 struct sk_buff *p_head;1243 struct sk_buff *p_tail;1244 u32 fr_new;1245 u32 fr_compare;1246 1247 entry = brcmf_skbcb(p)->mac;1248 if (entry == NULL) {1249 bphy_err(drvr, "no mac descriptor found for skb %p\n", p);1250 return -ENOENT;1251 }1252 1253 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);1254 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {1255 prec += 1;1256 qfull_stat = &fws->stats.supprq_full_error;1257 1258 /* Fix out of order delivery of frames. Dont assume frame */1259 /* can be inserted at the end, but look for correct position */1260 pq = &entry->psq;1261 if (pktq_full(pq) || pktq_pfull(pq, prec)) {1262 *qfull_stat += 1;1263 return -ENFILE;1264 }1265 queue = &pq->q[prec].skblist;1266 1267 p_head = skb_peek(queue);1268 p_tail = skb_peek_tail(queue);1269 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);1270 1271 while (p_head != p_tail) {1272 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,1273 FREERUN);1274 /* be sure to handle wrap of 256 */1275 if (((fr_new > fr_compare) &&1276 ((fr_new - fr_compare) < 128)) ||1277 ((fr_new < fr_compare) &&1278 ((fr_compare - fr_new) > 128)))1279 break;1280 p_tail = skb_queue_prev(queue, p_tail);1281 }1282 /* Position found. Determine what to do */1283 if (p_tail == NULL) {1284 /* empty list */1285 __skb_queue_tail(queue, p);1286 } else {1287 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,1288 FREERUN);1289 if (((fr_new > fr_compare) &&1290 ((fr_new - fr_compare) < 128)) ||1291 ((fr_new < fr_compare) &&1292 ((fr_compare - fr_new) > 128))) {1293 /* After tail */1294 __skb_queue_after(queue, p_tail, p);1295 } else {1296 /* Before tail */1297 __skb_insert(p, p_tail->prev, p_tail, queue);1298 }1299 }1300 1301 /* Complete the counters and statistics */1302 pq->len++;1303 if (pq->hi_prec < prec)1304 pq->hi_prec = (u8) prec;1305 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {1306 *qfull_stat += 1;1307 return -ENFILE;1308 }1309 1310 /* increment total enqueued packet count */1311 fws->fifo_delay_map |= 1 << fifo;1312 fws->fifo_enqpkt[fifo]++;1313 1314 /* update the sk_buff state */1315 brcmf_skbcb(p)->state = state;1316 1317 /*1318 * A packet has been pushed so update traffic1319 * availability bitmap, if applicable1320 */1321 brcmf_fws_tim_update(fws, entry, fifo, true);1322 brcmf_fws_flow_control_check(fws, &entry->psq,1323 brcmf_skb_if_flags_get_field(p, INDEX));1324 return 0;1325}1326 1327static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)1328{1329 struct brcmf_fws_mac_descriptor *table;1330 struct brcmf_fws_mac_descriptor *entry;1331 struct sk_buff *p;1332 int num_nodes;1333 int node_pos;1334 int prec_out;1335 int pmsk;1336 int i;1337 1338 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;1339 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);1340 node_pos = fws->deq_node_pos[fifo];1341 1342 for (i = 0; i < num_nodes; i++) {1343 entry = &table[(node_pos + i) % num_nodes];1344 if (!entry->occupied ||1345 brcmf_fws_macdesc_closed(fws, entry, fifo))1346 continue;1347 1348 if (entry->suppressed)1349 pmsk = 2;1350 else1351 pmsk = 3;1352 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);1353 if (p == NULL) {1354 if (entry->suppressed) {1355 if (entry->suppr_transit_count)1356 continue;1357 entry->suppressed = false;1358 p = brcmu_pktq_mdeq(&entry->psq,1359 1 << (fifo * 2), &prec_out);1360 }1361 }1362 if (p == NULL)1363 continue;1364 1365 brcmf_fws_macdesc_use_req_credit(entry, p);1366 1367 /* move dequeue position to ensure fair round-robin */1368 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;1369 brcmf_fws_flow_control_check(fws, &entry->psq,1370 brcmf_skb_if_flags_get_field(p,1371 INDEX)1372 );1373 /*1374 * A packet has been picked up, update traffic1375 * availability bitmap, if applicable1376 */1377 brcmf_fws_tim_update(fws, entry, fifo, false);1378 1379 /*1380 * decrement total enqueued fifo packets and1381 * clear delay bitmap if done.1382 */1383 fws->fifo_enqpkt[fifo]--;1384 if (fws->fifo_enqpkt[fifo] == 0)1385 fws->fifo_delay_map &= ~(1 << fifo);1386 goto done;1387 }1388 p = NULL;1389done:1390 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);1391 return p;1392}1393 1394static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,1395 struct sk_buff *skb,1396 u32 genbit, u16 seq)1397{1398 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;1399 u32 hslot;1400 int ret;1401 1402 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);1403 1404 /* this packet was suppressed */1405 if (!entry->suppressed) {1406 entry->suppressed = true;1407 entry->suppr_transit_count = entry->transit_count;1408 brcmf_dbg(DATA, "suppress %s: transit %d\n",1409 entry->name, entry->transit_count);1410 }1411 1412 entry->generation = genbit;1413 1414 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);1415 brcmf_skbcb(skb)->htod_seq = seq;1416 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {1417 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);1418 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);1419 } else {1420 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);1421 }1422 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);1423 1424 if (ret != 0) {1425 /* suppress q is full drop this packet */1426 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);1427 } else {1428 /* Mark suppressed to avoid a double free during wlfc cleanup */1429 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);1430 }1431 1432 return ret;1433}1434 1435static int1436brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,1437 u32 genbit, u16 seq, u8 compcnt)1438{1439 struct brcmf_pub *drvr = fws->drvr;1440 u32 fifo;1441 u8 cnt = 0;1442 int ret;1443 bool remove_from_hanger = true;1444 struct sk_buff *skb;1445 struct brcmf_skbuff_cb *skcb;1446 struct brcmf_fws_mac_descriptor *entry = NULL;1447 struct brcmf_if *ifp;1448 1449 brcmf_dbg(DATA, "flags %d\n", flags);1450 1451 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)1452 fws->stats.txs_discard += compcnt;1453 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {1454 fws->stats.txs_supp_core += compcnt;1455 remove_from_hanger = false;1456 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {1457 fws->stats.txs_supp_ps += compcnt;1458 remove_from_hanger = false;1459 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)1460 fws->stats.txs_tossed += compcnt;1461 else if (flags == BRCMF_FWS_TXSTATUS_FW_DISCARD_NOACK)1462 fws->stats.txs_discard += compcnt;1463 else if (flags == BRCMF_FWS_TXSTATUS_FW_SUPPRESS_ACKED)1464 fws->stats.txs_discard += compcnt;1465 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)1466 fws->stats.txs_host_tossed += compcnt;1467 else1468 bphy_err(drvr, "unexpected txstatus\n");1469 1470 while (cnt < compcnt) {1471 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,1472 remove_from_hanger);1473 if (ret != 0) {1474 bphy_err(drvr, "no packet in hanger slot: hslot=%d\n",1475 hslot);1476 goto cont;1477 }1478 1479 skcb = brcmf_skbcb(skb);1480 entry = skcb->mac;1481 if (WARN_ON(!entry)) {1482 brcmu_pkt_buf_free_skb(skb);1483 goto cont;1484 }1485 entry->transit_count--;1486 if (entry->suppressed && entry->suppr_transit_count)1487 entry->suppr_transit_count--;1488 1489 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name,1490 flags, skcb->htod, seq);1491 1492 /* pick up the implicit credit from this packet */1493 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);1494 if (fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT ||1495 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||1496 flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) {1497 brcmf_fws_return_credits(fws, fifo, 1);1498 brcmf_fws_schedule_deq(fws);1499 }1500 brcmf_fws_macdesc_return_req_credit(skb);1501 1502 ret = brcmf_proto_hdrpull(fws->drvr, false, skb, &ifp);1503 if (ret) {1504 brcmu_pkt_buf_free_skb(skb);1505 goto cont;1506 }1507 if (!remove_from_hanger)1508 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb,1509 genbit, seq);1510 if (remove_from_hanger || ret)1511 brcmf_txfinalize(ifp, skb, true);1512 1513cont:1514 hslot = (hslot + 1) & (BRCMF_FWS_TXSTAT_HSLOT_MASK >>1515 BRCMF_FWS_TXSTAT_HSLOT_SHIFT);1516 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))1517 seq = (seq + 1) & BRCMF_SKB_HTOD_SEQ_NR_MASK;1518 1519 cnt++;1520 }1521 1522 return 0;1523}1524 1525static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,1526 u8 *data)1527{1528 int i;1529 1530 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {1531 brcmf_dbg(INFO, "ignored\n");1532 return BRCMF_FWS_RET_OK_NOSCHEDULE;1533 }1534 1535 brcmf_dbg(DATA, "enter: data %pM\n", data);1536 brcmf_fws_lock(fws);1537 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)1538 brcmf_fws_return_credits(fws, i, data[i]);1539 1540 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,1541 fws->fifo_delay_map);1542 brcmf_fws_unlock(fws);1543 return BRCMF_FWS_RET_OK_SCHEDULE;1544}1545 1546static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 type,1547 u8 *data)1548{1549 __le32 status_le;1550 __le16 seq_le;1551 u32 status;1552 u32 hslot;1553 u32 genbit;1554 u8 flags;1555 u16 seq;1556 u8 compcnt;1557 u8 compcnt_offset = BRCMF_FWS_TYPE_TXSTATUS_LEN;1558 1559 memcpy(&status_le, data, sizeof(status_le));1560 status = le32_to_cpu(status_le);1561 flags = brcmf_txstatus_get_field(status, FLAGS);1562 hslot = brcmf_txstatus_get_field(status, HSLOT);1563 genbit = brcmf_txstatus_get_field(status, GENERATION);1564 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {1565 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_TXSTATUS_LEN],1566 sizeof(seq_le));1567 seq = le16_to_cpu(seq_le);1568 compcnt_offset += BRCMF_FWS_TYPE_SEQ_LEN;1569 } else {1570 seq = 0;1571 }1572 1573 if (type == BRCMF_FWS_TYPE_COMP_TXSTATUS)1574 compcnt = data[compcnt_offset];1575 else1576 compcnt = 1;1577 fws->stats.txs_indicate += compcnt;1578 1579 brcmf_fws_lock(fws);1580 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq, compcnt);1581 brcmf_fws_unlock(fws);1582 return BRCMF_FWS_RET_OK_NOSCHEDULE;1583}1584 1585static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)1586{1587 __le32 timestamp;1588 1589 memcpy(×tamp, &data[2], sizeof(timestamp));1590 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],1591 le32_to_cpu(timestamp));1592 return 0;1593}1594 1595static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,1596 const struct brcmf_event_msg *e,1597 void *data)1598{1599 struct brcmf_pub *drvr = ifp->drvr;1600 struct brcmf_fws_info *fws = drvr_to_fws(drvr);1601 int i;1602 u8 *credits = data;1603 1604 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {1605 bphy_err(drvr, "event payload too small (%d)\n", e->datalen);1606 return -EINVAL;1607 }1608 1609 fws->creditmap_received = true;1610 1611 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);1612 brcmf_fws_lock(fws);1613 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {1614 fws->fifo_credit[i] += credits[i] - fws->init_fifo_credit[i];1615 fws->init_fifo_credit[i] = credits[i];1616 if (fws->fifo_credit[i] > 0)1617 fws->fifo_credit_map |= 1 << i;1618 else1619 fws->fifo_credit_map &= ~(1 << i);1620 WARN_ONCE(fws->fifo_credit[i] < 0,1621 "fifo_credit[%d] is negative(%d)\n", i,1622 fws->fifo_credit[i]);1623 }1624 brcmf_fws_schedule_deq(fws);1625 brcmf_fws_unlock(fws);1626 return 0;1627}1628 1629static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,1630 const struct brcmf_event_msg *e,1631 void *data)1632{1633 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);1634 1635 if (fws) {1636 brcmf_fws_lock(fws);1637 fws->bcmc_credit_check = true;1638 brcmf_fws_unlock(fws);1639 }1640 return 0;1641}1642 1643static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi,1644 u8 start, u8 end,1645 struct sk_buff_head *skb_list)1646{1647 /* initialize return list */1648 __skb_queue_head_init(skb_list);1649 1650 if (rfi->pend_pkts == 0) {1651 brcmf_dbg(INFO, "no packets in reorder queue\n");1652 return;1653 }1654 1655 do {1656 if (rfi->pktslots[start]) {1657 __skb_queue_tail(skb_list, rfi->pktslots[start]);1658 rfi->pktslots[start] = NULL;1659 }1660 start++;1661 if (start > rfi->max_idx)1662 start = 0;1663 } while (start != end);1664 rfi->pend_pkts -= skb_queue_len(skb_list);1665}1666 1667void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt)1668{1669 struct brcmf_pub *drvr = ifp->drvr;1670 u8 *reorder_data;1671 u8 flow_id, max_idx, cur_idx, exp_idx, end_idx;1672 struct brcmf_ampdu_rx_reorder *rfi;1673 struct sk_buff_head reorder_list;1674 struct sk_buff *pnext;1675 u8 flags;1676 1677 reorder_data = ((struct brcmf_skb_reorder_data *)pkt->cb)->reorder;1678 flow_id = reorder_data[BRCMF_RXREORDER_FLOWID_OFFSET];1679 flags = reorder_data[BRCMF_RXREORDER_FLAGS_OFFSET];1680 1681 /* validate flags and flow id */1682 if (flags == 0xFF) {1683 bphy_err(drvr, "invalid flags...so ignore this packet\n");1684 brcmf_netif_rx(ifp, pkt);1685 return;1686 }1687 1688 rfi = ifp->drvr->reorder_flows[flow_id];1689 if (flags & BRCMF_RXREORDER_DEL_FLOW) {1690 brcmf_dbg(INFO, "flow-%d: delete\n",1691 flow_id);1692 1693 if (rfi == NULL) {1694 brcmf_dbg(INFO, "received flags to cleanup, but no flow (%d) yet\n",1695 flow_id);1696 brcmf_netif_rx(ifp, pkt);1697 return;1698 }1699 1700 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, rfi->exp_idx,1701 &reorder_list);1702 /* add the last packet */1703 __skb_queue_tail(&reorder_list, pkt);1704 kfree(rfi);1705 ifp->drvr->reorder_flows[flow_id] = NULL;1706 goto netif_rx;1707 }1708 /* from here on we need a flow reorder instance */1709 if (rfi == NULL) {1710 max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];1711 1712 /* allocate space for flow reorder info */1713 brcmf_dbg(INFO, "flow-%d: start, maxidx %d\n",1714 flow_id, max_idx);1715 rfi = kzalloc(struct_size(rfi, pktslots, max_idx + 1),1716 GFP_ATOMIC);1717 if (rfi == NULL) {1718 bphy_err(drvr, "failed to alloc buffer\n");1719 brcmf_netif_rx(ifp, pkt);1720 return;1721 }1722 1723 ifp->drvr->reorder_flows[flow_id] = rfi;1724 rfi->max_idx = max_idx;1725 }1726 if (flags & BRCMF_RXREORDER_NEW_HOLE) {1727 if (rfi->pend_pkts) {1728 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx,1729 rfi->exp_idx,1730 &reorder_list);1731 WARN_ON(rfi->pend_pkts);1732 } else {1733 __skb_queue_head_init(&reorder_list);1734 }1735 rfi->cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];1736 rfi->exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];1737 rfi->max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];1738 rfi->pktslots[rfi->cur_idx] = pkt;1739 rfi->pend_pkts++;1740 brcmf_dbg(DATA, "flow-%d: new hole %d (%d), pending %d\n",1741 flow_id, rfi->cur_idx, rfi->exp_idx, rfi->pend_pkts);1742 } else if (flags & BRCMF_RXREORDER_CURIDX_VALID) {1743 cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];1744 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];1745 1746 if ((exp_idx == rfi->exp_idx) && (cur_idx != rfi->exp_idx)) {1747 /* still in the current hole */1748 /* enqueue the current on the buffer chain */1749 if (rfi->pktslots[cur_idx] != NULL) {1750 brcmf_dbg(INFO, "HOLE: ERROR buffer pending..free it\n");1751 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);1752 rfi->pktslots[cur_idx] = NULL;1753 }1754 rfi->pktslots[cur_idx] = pkt;1755 rfi->pend_pkts++;1756 rfi->cur_idx = cur_idx;1757 brcmf_dbg(DATA, "flow-%d: store pkt %d (%d), pending %d\n",1758 flow_id, cur_idx, exp_idx, rfi->pend_pkts);1759 1760 /* can return now as there is no reorder1761 * list to process.1762 */1763 return;1764 }1765 if (rfi->exp_idx == cur_idx) {1766 if (rfi->pktslots[cur_idx] != NULL) {1767 brcmf_dbg(INFO, "error buffer pending..free it\n");1768 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);1769 rfi->pktslots[cur_idx] = NULL;1770 }1771 rfi->pktslots[cur_idx] = pkt;1772 rfi->pend_pkts++;1773 1774 /* got the expected one. flush from current to expected1775 * and update expected1776 */1777 brcmf_dbg(DATA, "flow-%d: expected %d (%d), pending %d\n",1778 flow_id, cur_idx, exp_idx, rfi->pend_pkts);1779 1780 rfi->cur_idx = cur_idx;1781 rfi->exp_idx = exp_idx;1782 1783 brcmf_rxreorder_get_skb_list(rfi, cur_idx, exp_idx,1784 &reorder_list);1785 brcmf_dbg(DATA, "flow-%d: freeing buffers %d, pending %d\n",1786 flow_id, skb_queue_len(&reorder_list),1787 rfi->pend_pkts);1788 } else {1789 u8 end_idx;1790 1791 brcmf_dbg(DATA, "flow-%d (0x%x): both moved, old %d/%d, new %d/%d\n",1792 flow_id, flags, rfi->cur_idx, rfi->exp_idx,1793 cur_idx, exp_idx);1794 if (flags & BRCMF_RXREORDER_FLUSH_ALL)1795 end_idx = rfi->exp_idx;1796 else1797 end_idx = exp_idx;1798 1799 /* flush pkts first */1800 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,1801 &reorder_list);1802 1803 if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) {1804 __skb_queue_tail(&reorder_list, pkt);1805 } else {1806 rfi->pktslots[cur_idx] = pkt;1807 rfi->pend_pkts++;1808 }1809 rfi->exp_idx = exp_idx;1810 rfi->cur_idx = cur_idx;1811 }1812 } else {1813 /* explicity window move updating the expected index */1814 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];1815 1816 brcmf_dbg(DATA, "flow-%d (0x%x): change expected: %d -> %d\n",1817 flow_id, flags, rfi->exp_idx, exp_idx);1818 if (flags & BRCMF_RXREORDER_FLUSH_ALL)1819 end_idx = rfi->exp_idx;1820 else1821 end_idx = exp_idx;1822 1823 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,1824 &reorder_list);1825 __skb_queue_tail(&reorder_list, pkt);1826 /* set the new expected idx */1827 rfi->exp_idx = exp_idx;1828 }1829netif_rx:1830 skb_queue_walk_safe(&reorder_list, pkt, pnext) {1831 __skb_unlink(pkt, &reorder_list);1832 brcmf_netif_rx(ifp, pkt);1833 }1834}1835 1836void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb)1837{1838 struct brcmf_skb_reorder_data *rd;1839 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);1840 u8 *signal_data;1841 s16 data_len;1842 u8 type;1843 u8 len;1844 u8 *data;1845 s32 status;1846 s32 err;1847 1848 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",1849 ifp->ifidx, skb->len, siglen);1850 1851 WARN_ON(siglen > skb->len);1852 1853 if (siglen > skb->len)1854 siglen = skb->len;1855 1856 if (!siglen)1857 return;1858 /* if flow control disabled, skip to packet data and leave */1859 if ((!fws) || (!fws->fw_signals)) {1860 skb_pull(skb, siglen);1861 return;1862 }1863 1864 fws->stats.header_pulls++;1865 data_len = siglen;1866 signal_data = skb->data;1867 1868 status = BRCMF_FWS_RET_OK_NOSCHEDULE;1869 while (data_len > 0) {1870 /* extract tlv info */1871 type = signal_data[0];1872 1873 /* FILLER type is actually not a TLV, but1874 * a single byte that can be skipped.1875 */1876 if (type == BRCMF_FWS_TYPE_FILLER) {1877 signal_data += 1;1878 data_len -= 1;1879 continue;1880 }1881 len = signal_data[1];1882 data = signal_data + 2;1883 1884 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",1885 brcmf_fws_get_tlv_name(type), type, len,1886 brcmf_fws_get_tlv_len(fws, type));1887 1888 /* abort parsing when length invalid */1889 if (data_len < len + 2)1890 break;1891 1892 if (len < brcmf_fws_get_tlv_len(fws, type))1893 break;1894 1895 err = BRCMF_FWS_RET_OK_NOSCHEDULE;1896 switch (type) {1897 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:1898 rd = (struct brcmf_skb_reorder_data *)skb->cb;1899 rd->reorder = data;1900 break;1901 case BRCMF_FWS_TYPE_MACDESC_ADD:1902 case BRCMF_FWS_TYPE_MACDESC_DEL:1903 brcmf_fws_macdesc_indicate(fws, type, data);1904 break;1905 case BRCMF_FWS_TYPE_MAC_OPEN:1906 case BRCMF_FWS_TYPE_MAC_CLOSE:1907 err = brcmf_fws_macdesc_state_indicate(fws, type, data);1908 break;1909 case BRCMF_FWS_TYPE_INTERFACE_OPEN:1910 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:1911 err = brcmf_fws_interface_state_indicate(fws, type,1912 data);1913 break;1914 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:1915 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:1916 err = brcmf_fws_request_indicate(fws, type, data);1917 break;1918 case BRCMF_FWS_TYPE_TXSTATUS:1919 case BRCMF_FWS_TYPE_COMP_TXSTATUS:1920 brcmf_fws_txstatus_indicate(fws, type, data);1921 break;1922 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:1923 err = brcmf_fws_fifocreditback_indicate(fws, data);1924 break;1925 case BRCMF_FWS_TYPE_RSSI:1926 brcmf_fws_rssi_indicate(fws, *data);1927 break;1928 case BRCMF_FWS_TYPE_TRANS_ID:1929 brcmf_fws_dbg_seqnum_check(fws, data);1930 break;1931 case BRCMF_FWS_TYPE_PKTTAG:1932 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:1933 default:1934 fws->stats.tlv_invalid_type++;1935 break;1936 }1937 if (err == BRCMF_FWS_RET_OK_SCHEDULE)1938 status = BRCMF_FWS_RET_OK_SCHEDULE;1939 signal_data += len + 2;1940 data_len -= len + 2;1941 }1942 1943 if (data_len != 0)1944 fws->stats.tlv_parse_failed++;1945 1946 if (status == BRCMF_FWS_RET_OK_SCHEDULE)1947 brcmf_fws_schedule_deq(fws);1948 1949 /* signalling processing result does1950 * not affect the actual ethernet packet.1951 */1952 skb_pull(skb, siglen);1953 1954 /* this may be a signal-only packet1955 */1956 if (skb->len == 0)1957 fws->stats.header_only_pkt++;1958}1959 1960static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,1961 struct sk_buff *p)1962{1963 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);1964 struct brcmf_fws_mac_descriptor *entry = skcb->mac;1965 u8 flags;1966 1967 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)1968 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);1969 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;1970 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {1971 /*1972 * Indicate that this packet is being sent in response to an1973 * explicit request from the firmware side.1974 */1975 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;1976 }1977 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);1978 return brcmf_fws_hdrpush(fws, p);1979}1980 1981static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,1982 struct sk_buff *skb, int fifo)1983{1984 struct brcmf_pub *drvr = fws->drvr;1985 struct brcmf_fws_mac_descriptor *entry;1986 struct sk_buff *pktout;1987 int qidx, hslot;1988 int rc = 0;1989 1990 entry = brcmf_skbcb(skb)->mac;1991 if (entry->occupied) {1992 qidx = 2 * fifo;1993 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)1994 qidx++;1995 1996 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);1997 if (pktout == NULL) {1998 bphy_err(drvr, "%s queue %d full\n", entry->name, qidx);1999 rc = -ENOSPC;2000 }2001 } else {2002 bphy_err(drvr, "%s entry removed\n", entry->name);2003 rc = -ENOENT;2004 }2005 2006 if (rc) {2007 fws->stats.rollback_failed++;2008 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);2009 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,2010 hslot, 0, 0, 1);2011 } else {2012 fws->stats.rollback_success++;2013 brcmf_fws_return_credits(fws, fifo, 1);2014 brcmf_fws_macdesc_return_req_credit(skb);2015 }2016}2017 2018static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws,2019 int highest_lender_ac, int borrower_ac,2020 bool borrow_all)2021{2022 int lender_ac, borrow_limit = 0;2023 2024 for (lender_ac = 0; lender_ac <= highest_lender_ac; lender_ac++) {2025 2026 if (!borrow_all)2027 borrow_limit =2028 fws->init_fifo_credit[lender_ac] / BRCMF_BORROW_RATIO;2029 else2030 borrow_limit = 0;2031 2032 if (fws->fifo_credit[lender_ac] > borrow_limit) {2033 fws->credits_borrowed[borrower_ac][lender_ac]++;2034 fws->fifo_credit[lender_ac]--;2035 if (fws->fifo_credit[lender_ac] == 0)2036 fws->fifo_credit_map &= ~(1 << lender_ac);2037 fws->fifo_credit_map |= (1 << borrower_ac);2038 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);2039 return 0;2040 }2041 }2042 fws->fifo_credit_map &= ~(1 << borrower_ac);2043 return -ENAVAIL;2044}2045 2046static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,2047 struct sk_buff *skb)2048{2049 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);2050 struct brcmf_fws_mac_descriptor *entry;2051 int rc;2052 u8 ifidx;2053 u8 data_offset;2054 2055 entry = skcb->mac;2056 if (IS_ERR(entry))2057 return PTR_ERR(entry);2058 2059 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);2060 entry->transit_count++;2061 if (entry->suppressed)2062 entry->suppr_transit_count++;2063 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);2064 brcmf_fws_unlock(fws);2065 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);2066 brcmf_fws_lock(fws);2067 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,2068 skcb->if_flags, skcb->htod, rc);2069 if (rc < 0) {2070 entry->transit_count--;2071 if (entry->suppressed)2072 entry->suppr_transit_count--;2073 (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL);2074 goto rollback;2075 }2076 2077 fws->stats.pkt2bus++;2078 fws->stats.send_pkts[fifo]++;2079 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))2080 fws->stats.requested_sent[fifo]++;2081 2082 return rc;2083 2084rollback:2085 brcmf_fws_rollback_toq(fws, skb, fifo);2086 return rc;2087}2088 2089static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,2090 int fifo)2091{2092 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);2093 int rc, hslot;2094 2095 skcb->htod = 0;2096 skcb->htod_seq = 0;2097 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);2098 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);2099 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);2100 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);2101 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);2102 if (!rc)2103 skcb->mac->seq[fifo]++;2104 else2105 fws->stats.generic_error++;2106 return rc;2107}2108 2109int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)2110{2111 struct brcmf_pub *drvr = ifp->drvr;2112 struct brcmf_fws_info *fws = drvr_to_fws(drvr);2113 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);2114 struct ethhdr *eh = (struct ethhdr *)(skb->data);2115 int fifo = BRCMF_FWS_FIFO_BCMC;2116 bool multicast = is_multicast_ether_addr(eh->h_dest);2117 int rc = 0;2118 2119 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));2120 2121 /* set control buffer information */2122 skcb->if_flags = 0;2123 skcb->state = BRCMF_FWS_SKBSTATE_NEW;2124 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);2125 2126 /* mapping from 802.1d priority to firmware fifo index */2127 if (!multicast)2128 fifo = brcmf_map_prio_to_aci(drvr->config, skb->priority);2129 2130 brcmf_fws_lock(fws);2131 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)2132 fws->borrow_defer_timestamp = jiffies +2133 BRCMF_FWS_BORROW_DEFER_PERIOD;2134 2135 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);2136 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,2137 eh->h_dest, multicast, fifo);2138 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {2139 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);2140 brcmf_fws_schedule_deq(fws);2141 } else {2142 bphy_err(drvr, "no hanger slot available\n");2143 rc = -ENOMEM;2144 }2145 brcmf_fws_unlock(fws);2146 2147 return rc;2148}2149 2150void brcmf_fws_reset_interface(struct brcmf_if *ifp)2151{2152 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;2153 2154 brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);2155 if (!entry)2156 return;2157 2158 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);2159}2160 2161void brcmf_fws_add_interface(struct brcmf_if *ifp)2162{2163 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);2164 struct brcmf_fws_mac_descriptor *entry;2165 2166 if (!ifp->ndev || !brcmf_fws_queue_skbs(fws))2167 return;2168 2169 entry = &fws->desc.iface[ifp->ifidx];2170 ifp->fws_desc = entry;2171 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);2172 brcmf_fws_macdesc_set_name(fws, entry);2173 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,2174 BRCMF_FWS_PSQ_LEN);2175 brcmf_dbg(TRACE, "added %s\n", entry->name);2176}2177 2178void brcmf_fws_del_interface(struct brcmf_if *ifp)2179{2180 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;2181 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);2182 2183 if (!entry)2184 return;2185 2186 brcmf_fws_lock(fws);2187 ifp->fws_desc = NULL;2188 brcmf_dbg(TRACE, "deleting %s\n", entry->name);2189 brcmf_fws_macdesc_cleanup(fws, &fws->desc.iface[ifp->ifidx],2190 ifp->ifidx);2191 brcmf_fws_macdesc_deinit(entry);2192 brcmf_fws_cleanup(fws, ifp->ifidx);2193 brcmf_fws_unlock(fws);2194}2195 2196static void brcmf_fws_dequeue_worker(struct work_struct *worker)2197{2198 struct brcmf_fws_info *fws;2199 struct brcmf_pub *drvr;2200 struct sk_buff *skb;2201 int fifo;2202 u32 hslot;2203 u32 ifidx;2204 int ret;2205 2206 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);2207 drvr = fws->drvr;2208 2209 brcmf_fws_lock(fws);2210 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;2211 fifo--) {2212 if (!brcmf_fws_fc_active(fws)) {2213 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {2214 hslot = brcmf_skb_htod_tag_get_field(skb,2215 HSLOT);2216 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,2217 &skb, true);2218 ifidx = brcmf_skb_if_flags_get_field(skb,2219 INDEX);2220 /* Use proto layer to send data frame */2221 brcmf_fws_unlock(fws);2222 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);2223 brcmf_fws_lock(fws);2224 if (ret < 0)2225 brcmf_txfinalize(brcmf_get_ifp(drvr,2226 ifidx),2227 skb, false);2228 if (fws->bus_flow_blocked)2229 break;2230 }2231 continue;2232 }2233 2234 while ((fws->fifo_credit[fifo]) ||2235 ((!fws->bcmc_credit_check) &&2236 (fifo == BRCMF_FWS_FIFO_BCMC))) {2237 skb = brcmf_fws_deq(fws, fifo);2238 if (!skb)2239 break;2240 fws->fifo_credit[fifo]--;2241 if (brcmf_fws_commit_skb(fws, fifo, skb))2242 break;2243 if (fws->bus_flow_blocked)2244 break;2245 }2246 2247 if (fifo >= BRCMF_FWS_FIFO_AC_BE &&2248 fifo <= BRCMF_FWS_FIFO_AC_VO &&2249 fws->fifo_credit[fifo] == 0 &&2250 !fws->bus_flow_blocked) {2251 while (brcmf_fws_borrow_credit(fws,2252 fifo - 1, fifo,2253 true) == 0) {2254 skb = brcmf_fws_deq(fws, fifo);2255 if (!skb) {2256 brcmf_fws_return_credits(fws, fifo, 1);2257 break;2258 }2259 if (brcmf_fws_commit_skb(fws, fifo, skb))2260 break;2261 if (fws->bus_flow_blocked)2262 break;2263 }2264 }2265 }2266 brcmf_fws_unlock(fws);2267}2268 2269#ifdef DEBUG2270static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)2271{2272 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);2273 struct brcmf_fws_stats *fwstats = &(drvr_to_fws(bus_if->drvr)->stats);2274 2275 seq_printf(seq,2276 "header_pulls: %u\n"2277 "header_only_pkt: %u\n"2278 "tlv_parse_failed: %u\n"2279 "tlv_invalid_type: %u\n"2280 "mac_update_fails: %u\n"2281 "ps_update_fails: %u\n"2282 "if_update_fails: %u\n"2283 "pkt2bus: %u\n"2284 "generic_error: %u\n"2285 "rollback_success: %u\n"2286 "rollback_failed: %u\n"2287 "delayq_full: %u\n"2288 "supprq_full: %u\n"2289 "txs_indicate: %u\n"2290 "txs_discard: %u\n"2291 "txs_suppr_core: %u\n"2292 "txs_suppr_ps: %u\n"2293 "txs_tossed: %u\n"2294 "txs_host_tossed: %u\n"2295 "bus_flow_block: %u\n"2296 "fws_flow_block: %u\n"2297 "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n"2298 "requested_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n",2299 fwstats->header_pulls,2300 fwstats->header_only_pkt,2301 fwstats->tlv_parse_failed,2302 fwstats->tlv_invalid_type,2303 fwstats->mac_update_failed,2304 fwstats->mac_ps_update_failed,2305 fwstats->if_update_failed,2306 fwstats->pkt2bus,2307 fwstats->generic_error,2308 fwstats->rollback_success,2309 fwstats->rollback_failed,2310 fwstats->delayq_full_error,2311 fwstats->supprq_full_error,2312 fwstats->txs_indicate,2313 fwstats->txs_discard,2314 fwstats->txs_supp_core,2315 fwstats->txs_supp_ps,2316 fwstats->txs_tossed,2317 fwstats->txs_host_tossed,2318 fwstats->bus_flow_block,2319 fwstats->fws_flow_block,2320 fwstats->send_pkts[0], fwstats->send_pkts[1],2321 fwstats->send_pkts[2], fwstats->send_pkts[3],2322 fwstats->send_pkts[4],2323 fwstats->requested_sent[0],2324 fwstats->requested_sent[1],2325 fwstats->requested_sent[2],2326 fwstats->requested_sent[3],2327 fwstats->requested_sent[4]);2328 2329 return 0;2330}2331#else2332static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)2333{2334 return 0;2335}2336#endif2337 2338struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr)2339{2340 struct brcmf_fws_info *fws;2341 struct brcmf_if *ifp;2342 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;2343 int rc;2344 u32 mode;2345 2346 fws = kzalloc(sizeof(*fws), GFP_KERNEL);2347 if (!fws) {2348 rc = -ENOMEM;2349 goto fail;2350 }2351 2352 spin_lock_init(&fws->spinlock);2353 2354 /* store drvr reference */2355 fws->drvr = drvr;2356 fws->fcmode = drvr->settings->fcmode;2357 2358 if (!drvr->bus_if->always_use_fws_queue &&2359 (fws->fcmode == BRCMF_FWS_FCMODE_NONE)) {2360 fws->avoid_queueing = true;2361 brcmf_dbg(INFO, "FWS queueing will be avoided\n");2362 return fws;2363 }2364 2365 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");2366 if (fws->fws_wq == NULL) {2367 bphy_err(drvr, "workqueue creation failed\n");2368 rc = -EBADF;2369 goto fail;2370 }2371 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);2372 2373 /* enable firmware signalling if fcmode active */2374 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)2375 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |2376 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |2377 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |2378 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;2379 2380 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,2381 brcmf_fws_notify_credit_map);2382 if (rc < 0) {2383 bphy_err(drvr, "register credit map handler failed\n");2384 goto fail;2385 }2386 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,2387 brcmf_fws_notify_bcmc_credit_support);2388 if (rc < 0) {2389 bphy_err(drvr, "register bcmc credit handler failed\n");2390 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);2391 goto fail;2392 }2393 2394 /* Setting the iovar may fail if feature is unsupported2395 * so leave the rc as is so driver initialization can2396 * continue. Set mode back to none indicating not enabled.2397 */2398 fws->fw_signals = true;2399 ifp = brcmf_get_ifp(drvr, 0);2400 if (brcmf_fil_iovar_int_set(ifp, "tlv", tlv)) {2401 bphy_err(drvr, "failed to set bdcv2 tlv signaling\n");2402 fws->fcmode = BRCMF_FWS_FCMODE_NONE;2403 fws->fw_signals = false;2404 }2405 2406 if (brcmf_fil_iovar_int_set(ifp, "ampdu_hostreorder", 1))2407 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");2408 2409 /* Enable seq number reuse, if supported */2410 if (brcmf_fil_iovar_int_get(ifp, "wlfc_mode", &mode) == 0) {2411 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {2412 mode = 0;2413 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);2414 if (brcmf_fil_iovar_int_set(ifp,2415 "wlfc_mode", mode) == 0) {2416 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);2417 }2418 }2419 }2420 2421 brcmf_fws_hanger_init(&fws->hanger);2422 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);2423 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);2424 brcmf_dbg(INFO, "added %s\n", fws->desc.other.name);2425 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,2426 BRCMF_FWS_PSQ_LEN);2427 2428 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",2429 fws->fw_signals ? "enabled" : "disabled", tlv);2430 return fws;2431 2432fail:2433 brcmf_fws_detach(fws);2434 return ERR_PTR(rc);2435}2436 2437void brcmf_fws_detach(struct brcmf_fws_info *fws)2438{2439 if (!fws)2440 return;2441 2442 if (fws->fws_wq)2443 destroy_workqueue(fws->fws_wq);2444 2445 /* cleanup */2446 brcmf_fws_lock(fws);2447 brcmf_fws_cleanup(fws, -1);2448 brcmf_fws_unlock(fws);2449 2450 /* free top structure */2451 kfree(fws);2452}2453 2454void brcmf_fws_debugfs_create(struct brcmf_pub *drvr)2455{2456 /* create debugfs file for statistics */2457 brcmf_debugfs_add_entry(drvr, "fws_stats",2458 brcmf_debugfs_fws_stats_read);2459}2460 2461bool brcmf_fws_queue_skbs(struct brcmf_fws_info *fws)2462{2463 return !fws->avoid_queueing;2464}2465 2466bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)2467{2468 if (!fws->creditmap_received)2469 return false;2470 2471 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;2472}2473 2474void brcmf_fws_bustxcomplete(struct brcmf_fws_info *fws, struct sk_buff *skb,2475 bool success)2476{2477 u32 hslot;2478 2479 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {2480 brcmu_pkt_buf_free_skb(skb);2481 return;2482 }2483 2484 if (!success) {2485 brcmf_fws_lock(fws);2486 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);2487 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot,2488 0, 0, 1);2489 brcmf_fws_unlock(fws);2490 }2491}2492 2493void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)2494{2495 struct brcmf_fws_info *fws = drvr_to_fws(drvr);2496 struct brcmf_if *ifp;2497 int i;2498 2499 if (fws->avoid_queueing) {2500 for (i = 0; i < BRCMF_MAX_IFS; i++) {2501 ifp = drvr->iflist[i];2502 if (!ifp || !ifp->ndev)2503 continue;2504 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,2505 flow_blocked);2506 }2507 } else {2508 fws->bus_flow_blocked = flow_blocked;2509 if (!flow_blocked)2510 brcmf_fws_schedule_deq(fws);2511 else2512 fws->stats.bus_flow_block++;2513 }2514}2515