diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 1047 |
1 files changed, 403 insertions, 644 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c index 472f2ef..3564686 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c @@ -482,6 +482,15 @@ struct sdpcm_shared_le { __le32 brpt_addr; }; +/* SDIO read frame info */ +struct brcmf_sdio_read { + u8 seq_num; + u8 channel; + u16 len; + u16 len_left; + u16 len_nxtfrm; + u8 dat_offset; +}; /* misc chip info needed by some of the routines */ /* Private data for SDIO bus interaction */ @@ -494,9 +503,8 @@ struct brcmf_sdio { u32 ramsize; /* Size of RAM in SOCRAM (bytes) */ u32 hostintmask; /* Copy of Host Interrupt Mask */ - u32 intstatus; /* Intstatus bits (events) pending */ - bool dpc_sched; /* Indicates DPC schedule (intrpt rcvd) */ - bool fcstate; /* State of dongle flow-control */ + atomic_t intstatus; /* Intstatus bits (events) pending */ + atomic_t fcstate; /* State of dongle flow-control */ uint blocksize; /* Block size of SDIO transfers */ uint roundup; /* Max roundup limit */ @@ -508,9 +516,11 @@ struct brcmf_sdio { u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN]; u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */ - u16 nextlen; /* Next Read Len from last header */ u8 rx_seq; /* Receive sequence number (expected) */ + struct brcmf_sdio_read cur_read; + /* info of current read frame */ bool rxskip; /* Skip receive (awaiting NAK ACK) */ + bool rxpending; /* Data frame pending in dongle */ uint rxbound; /* Rx frames to read before resched */ uint txbound; /* Tx frames to send before resched */ @@ -531,7 +541,7 @@ struct brcmf_sdio { bool intr; /* Use interrupts */ bool poll; /* Use polling */ - bool ipend; /* Device interrupt is pending */ + atomic_t ipend; /* Device interrupt is pending */ uint spurious; /* Count of spurious interrupts */ uint pollrate; /* Ticks between device polls */ uint polltick; /* Tick counter */ @@ -549,12 +559,9 @@ struct brcmf_sdio { s32 idleclock; /* How to set bus driver when idle */ s32 sd_rxchain; bool use_rxchain; /* If brcmf should use PKT chains */ - bool sleeping; /* Is SDIO bus sleeping? */ bool rxflow_mode; /* Rx flow control mode */ bool rxflow; /* Is rx flow control on */ bool alp_only; /* Don't use HT clock (ALP only) */ -/* Field to decide if rx of control frames happen in rxbuf or lb-pool */ - bool usebufpool; u8 *ctrl_frame_buf; u32 ctrl_frame_len; @@ -570,8 +577,8 @@ struct brcmf_sdio { bool wd_timer_valid; uint save_ms; - struct task_struct *dpc_tsk; - struct completion dpc_wait; + struct workqueue_struct *brcmf_wq; + struct work_struct datawork; struct list_head dpc_tsklst; spinlock_t dpc_tl_lock; @@ -657,15 +664,6 @@ w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset) #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE) -/* Packet free applicable unconditionally for sdio and sdspi. - * Conditional if bufpool was present for gspi bus. - */ -static void brcmf_sdbrcm_pktfree2(struct brcmf_sdio *bus, struct sk_buff *pkt) -{ - if (bus->usebufpool) - brcmu_pkt_buf_free_skb(pkt); -} - /* Turn backplane clock on or off */ static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok) { @@ -853,81 +851,6 @@ static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok) return 0; } -static int brcmf_sdbrcm_bussleep(struct brcmf_sdio *bus, bool sleep) -{ - int ret; - - brcmf_dbg(INFO, "request %s (currently %s)\n", - sleep ? "SLEEP" : "WAKE", - bus->sleeping ? "SLEEP" : "WAKE"); - - /* Done if we're already in the requested state */ - if (sleep == bus->sleeping) - return 0; - - /* Going to sleep: set the alarm and turn off the lights... */ - if (sleep) { - /* Don't sleep if something is pending */ - if (bus->dpc_sched || bus->rxskip || pktq_len(&bus->txq)) - return -EBUSY; - - /* Make sure the controller has the bus up */ - brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); - - /* Tell device to start using OOB wakeup */ - ret = w_sdreg32(bus, SMB_USE_OOB, - offsetof(struct sdpcmd_regs, tosbmailbox)); - if (ret != 0) - brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP, WILL NOT WAKE UP!!\n"); - - /* Turn off our contribution to the HT clock request */ - brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); - - brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - SBSDIO_FORCE_HW_CLKREQ_OFF, NULL); - - /* Isolate the bus */ - brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL, - SBSDIO_DEVCTL_PADS_ISO, NULL); - - /* Change state */ - bus->sleeping = true; - - } else { - /* Waking up: bus power up is ok, set local state */ - - brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, - 0, NULL); - - /* Make sure the controller has the bus up */ - brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); - - /* Send misc interrupt to indicate OOB not needed */ - ret = w_sdreg32(bus, 0, - offsetof(struct sdpcmd_regs, tosbmailboxdata)); - if (ret == 0) - ret = w_sdreg32(bus, SMB_DEV_INT, - offsetof(struct sdpcmd_regs, tosbmailbox)); - - if (ret != 0) - brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP TO CLEAR OOB!!\n"); - - /* Make sure we have SD bus access */ - brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); - - /* Change state */ - bus->sleeping = false; - } - - return 0; -} - -static void bus_wake(struct brcmf_sdio *bus) -{ - if (bus->sleeping) - brcmf_sdbrcm_bussleep(bus, false); -} - static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus) { u32 intstatus = 0; @@ -1056,7 +979,7 @@ static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx) } /* Clear partial in any case */ - bus->nextlen = 0; + bus->cur_read.len = 0; /* If we can't reach the device, signal failure */ if (err) @@ -1108,6 +1031,96 @@ static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus) } } +static bool brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header, + struct brcmf_sdio_read *rd) +{ + u16 len, checksum; + u8 rx_seq, fc, tx_seq_max; + + /* + * 4 bytes hardware header (frame tag) + * Byte 0~1: Frame length + * Byte 2~3: Checksum, bit-wise inverse of frame length + */ + len = get_unaligned_le16(header); + checksum = get_unaligned_le16(header + sizeof(u16)); + /* All zero means no more to read */ + if (!(len | checksum)) { + bus->rxpending = false; + return false; + } + if ((u16)(~(len ^ checksum))) { + brcmf_dbg(ERROR, "HW header checksum error\n"); + bus->sdcnt.rx_badhdr++; + brcmf_sdbrcm_rxfail(bus, false, false); + return false; + } + if (len < SDPCM_HDRLEN) { + brcmf_dbg(ERROR, "HW header length error\n"); + return false; + } + rd->len = len; + + /* + * 8 bytes hardware header + * Byte 0: Rx sequence number + * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag + * Byte 2: Length of next data frame + * Byte 3: Data offset + * Byte 4: Flow control bits + * Byte 5: Maximum Sequence number allow for Tx + * Byte 6~7: Reserved + */ + rx_seq = SDPCM_PACKET_SEQUENCE(&header[SDPCM_FRAMETAG_LEN]); + rd->channel = SDPCM_PACKET_CHANNEL(&header[SDPCM_FRAMETAG_LEN]); + if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL) { + brcmf_dbg(ERROR, "HW header length too long\n"); + bus->sdiodev->bus_if->dstats.rx_errors++; + bus->sdcnt.rx_toolong++; + brcmf_sdbrcm_rxfail(bus, false, false); + rd->len = 0; + return false; + } + rd->dat_offset = SDPCM_DOFFSET_VALUE(&header[SDPCM_FRAMETAG_LEN]); + if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) { + brcmf_dbg(ERROR, "seq %d: bad data offset\n", rx_seq); + bus->sdcnt.rx_badhdr++; + brcmf_sdbrcm_rxfail(bus, false, false); + rd->len = 0; + return false; + } + if (rd->seq_num != rx_seq) { + brcmf_dbg(ERROR, "seq %d: sequence number error, expect %d\n", + rx_seq, rd->seq_num); + bus->sdcnt.rx_badseq++; + rd->seq_num = rx_seq; + } + rd->len_nxtfrm = header[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; + if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) { + /* only warm for NON glom packet */ + if (rd->channel != SDPCM_GLOM_CHANNEL) + brcmf_dbg(ERROR, "seq %d: next length error\n", rx_seq); + rd->len_nxtfrm = 0; + } + fc = SDPCM_FCMASK_VALUE(&header[SDPCM_FRAMETAG_LEN]); + if (bus->flowcontrol != fc) { + if (~bus->flowcontrol & fc) + bus->sdcnt.fc_xoff++; + if (bus->flowcontrol & ~fc) + bus->sdcnt.fc_xon++; + bus->sdcnt.fc_rcvd++; + bus->flowcontrol = fc; + } + tx_seq_max = SDPCM_WINDOW_VALUE(&header[SDPCM_FRAMETAG_LEN]); + if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) { + brcmf_dbg(ERROR, "seq %d: max tx seq number error\n", rx_seq); + tx_seq_max = bus->tx_seq + 2; + } + bus->tx_max = tx_seq_max; + + return true; +} + static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) { u16 dlen, totlen; @@ -1122,6 +1135,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) int ifidx = 0; bool usechain = bus->use_rxchain; + u16 next_len; /* If packets, issue read(s) and send up packet chain */ /* Return sequence numbers consumed? */ @@ -1185,10 +1199,10 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) if (pnext) { brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n", totlen, num); - if (BRCMF_GLOM_ON() && bus->nextlen && - totlen != bus->nextlen) { + if (BRCMF_GLOM_ON() && bus->cur_read.len && + totlen != bus->cur_read.len) { brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n", - bus->nextlen, totlen, rxseq); + bus->cur_read.len, totlen, rxseq); } pfirst = pnext = NULL; } else { @@ -1199,7 +1213,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) /* Done with descriptor packet */ brcmu_pkt_buf_free_skb(bus->glomd); bus->glomd = NULL; - bus->nextlen = 0; + bus->cur_read.len = 0; } /* Ok -- either we just generated a packet chain, @@ -1272,12 +1286,13 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]); seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]); - bus->nextlen = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; - if ((bus->nextlen << 4) > MAX_RX_DATASZ) { + next_len = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; + if ((next_len << 4) > MAX_RX_DATASZ) { brcmf_dbg(INFO, "nextlen too large (%d) seq %d\n", - bus->nextlen, seq); - bus->nextlen = 0; + next_len, seq); + next_len = 0; } + bus->cur_read.len = next_len << 4; doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); txmax = SDPCM_WINDOW_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); @@ -1378,7 +1393,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq) bus->sdcnt.rxglomfail++; brcmf_sdbrcm_free_glom(bus); } - bus->nextlen = 0; + bus->cur_read.len = 0; return 0; } @@ -1573,422 +1588,166 @@ static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen) } } -static void -brcmf_alloc_pkt_and_read(struct brcmf_sdio *bus, u16 rdlen, - struct sk_buff **pkt, u8 **rxbuf) +static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes) { - int sdret; /* Return code from calls */ - - *pkt = brcmu_pkt_buf_get_skb(rdlen + BRCMF_SDALIGN); - if (*pkt == NULL) - return; - - pkt_align(*pkt, rdlen, BRCMF_SDALIGN); - *rxbuf = (u8 *) ((*pkt)->data); - /* Read the entire frame */ - sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad, - SDIO_FUNC_2, F2SYNC, *pkt); - bus->sdcnt.f2rxdata++; - - if (sdret < 0) { - brcmf_dbg(ERROR, "(nextlen): read %d bytes failed: %d\n", - rdlen, sdret); - brcmu_pkt_buf_free_skb(*pkt); - bus->sdiodev->bus_if->dstats.rx_errors++; - /* Force retry w/normal header read. - * Don't attempt NAK for - * gSPI - */ - brcmf_sdbrcm_rxfail(bus, true, true); - *pkt = NULL; - } -} - -/* Checks the header */ -static int -brcmf_check_rxbuf(struct brcmf_sdio *bus, struct sk_buff *pkt, u8 *rxbuf, - u8 rxseq, u16 nextlen, u16 *len) -{ - u16 check; - bool len_consistent; /* Result of comparing readahead len and - len from hw-hdr */ - - memcpy(bus->rxhdr, rxbuf, SDPCM_HDRLEN); - - /* Extract hardware header fields */ - *len = get_unaligned_le16(bus->rxhdr); - check = get_unaligned_le16(bus->rxhdr + sizeof(u16)); - - /* All zeros means readahead info was bad */ - if (!(*len | check)) { - brcmf_dbg(INFO, "(nextlen): read zeros in HW header???\n"); - goto fail; - } - - /* Validate check bytes */ - if ((u16)~(*len ^ check)) { - brcmf_dbg(ERROR, "(nextlen): HW hdr error: nextlen/len/check 0x%04x/0x%04x/0x%04x\n", - nextlen, *len, check); - bus->sdcnt.rx_badhdr++; - brcmf_sdbrcm_rxfail(bus, false, false); - goto fail; - } - - /* Validate frame length */ - if (*len < SDPCM_HDRLEN) { - brcmf_dbg(ERROR, "(nextlen): HW hdr length invalid: %d\n", - *len); - goto fail; - } - - /* Check for consistency with readahead info */ - len_consistent = (nextlen != (roundup(*len, 16) >> 4)); - if (len_consistent) { - /* Mismatch, force retry w/normal - header (may be >4K) */ - brcmf_dbg(ERROR, "(nextlen): mismatch, nextlen %d len %d rnd %d; expected rxseq %d\n", - nextlen, *len, roundup(*len, 16), - rxseq); - brcmf_sdbrcm_rxfail(bus, true, true); - goto fail; - } - - return 0; - -fail: - brcmf_sdbrcm_pktfree2(bus, pkt); - return -EINVAL; -} - -/* Return true if there may be more frames to read */ -static uint -brcmf_sdbrcm_readframes(struct brcmf_sdio *bus, uint maxframes, bool *finished) -{ - u16 len, check; /* Extracted hardware header fields */ - u8 chan, seq, doff; /* Extracted software header fields */ - u8 fcbits; /* Extracted fcbits from software header */ - struct sk_buff *pkt; /* Packet for event or data frames */ u16 pad; /* Number of pad bytes to read */ - u16 rdlen; /* Total number of bytes to read */ - u8 rxseq; /* Next sequence number to expect */ uint rxleft = 0; /* Remaining number of frames allowed */ int sdret; /* Return code from calls */ - u8 txmax; /* Maximum tx sequence offered */ - u8 *rxbuf; int ifidx = 0; uint rxcount = 0; /* Total frames read */ + struct brcmf_sdio_read *rd = &bus->cur_read, rd_new; + u8 head_read = 0; brcmf_dbg(TRACE, "Enter\n"); /* Not finished unless we encounter no more frames indication */ - *finished = false; + bus->rxpending = true; - for (rxseq = bus->rx_seq, rxleft = maxframes; + for (rd->seq_num = bus->rx_seq, rxleft = maxframes; !bus->rxskip && rxleft && bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN; - rxseq++, rxleft--) { + rd->seq_num++, rxleft--) { /* Handle glomming separately */ if (bus->glomd || !skb_queue_empty(&bus->glom)) { u8 cnt; brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n", bus->glomd, skb_peek(&bus->glom)); - cnt = brcmf_sdbrcm_rxglom(bus, rxseq); + cnt = brcmf_sdbrcm_rxglom(bus, rd->seq_num); brcmf_dbg(GLOM, "rxglom returned %d\n", cnt); - rxseq += cnt - 1; + rd->seq_num += cnt - 1; rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1; continue; } - /* Try doing single read if we can */ - if (bus->nextlen) { - u16 nextlen = bus->nextlen; - bus->nextlen = 0; - - rdlen = len = nextlen << 4; - brcmf_pad(bus, &pad, &rdlen); - - /* - * After the frame is received we have to - * distinguish whether it is data - * or non-data frame. - */ - brcmf_alloc_pkt_and_read(bus, rdlen, &pkt, &rxbuf); - if (pkt == NULL) { - /* Give up on data, request rtx of events */ - brcmf_dbg(ERROR, "(nextlen): brcmf_alloc_pkt_and_read failed: len %d rdlen %d expected rxseq %d\n", - len, rdlen, rxseq); - continue; - } - - if (brcmf_check_rxbuf(bus, pkt, rxbuf, rxseq, nextlen, - &len) < 0) + rd->len_left = rd->len; + /* read header first for unknow frame length */ + if (!rd->len) { + sdret = brcmf_sdcard_recv_buf(bus->sdiodev, + bus->sdiodev->sbwad, + SDIO_FUNC_2, F2SYNC, + bus->rxhdr, + BRCMF_FIRSTREAD); + bus->sdcnt.f2rxhdrs++; + if (sdret < 0) { + brcmf_dbg(ERROR, "RXHEADER FAILED: %d\n", + sdret); + bus->sdcnt.rx_hdrfail++; + brcmf_sdbrcm_rxfail(bus, true, true); continue; - - /* Extract software header fields */ - chan = SDPCM_PACKET_CHANNEL( - &bus->rxhdr[SDPCM_FRAMETAG_LEN]); - seq = SDPCM_PACKET_SEQUENCE( - &bus->rxhdr[SDPCM_FRAMETAG_LEN]); - doff = SDPCM_DOFFSET_VALUE( - &bus->rxhdr[SDPCM_FRAMETAG_LEN]); - txmax = SDPCM_WINDOW_VALUE( - &bus->rxhdr[SDPCM_FRAMETAG_LEN]); - - bus->nextlen = - bus->rxhdr[SDPCM_FRAMETAG_LEN + - SDPCM_NEXTLEN_OFFSET]; - if ((bus->nextlen << 4) > MAX_RX_DATASZ) { - brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n", - bus->nextlen, seq); - bus->nextlen = 0; } - bus->sdcnt.rx_readahead_cnt++; - - /* Handle Flow Control */ - fcbits = SDPCM_FCMASK_VALUE( - &bus->rxhdr[SDPCM_FRAMETAG_LEN]); - - if (bus->flowcontrol != fcbits) { - if (~bus->flowcontrol & fcbits) - bus->sdcnt.fc_xoff++; - - if (bus->flowcontrol & ~fcbits) - bus->sdcnt.fc_xon++; - - bus->sdcnt.fc_rcvd++; - bus->flowcontrol = fcbits; - } - - /* Check and update sequence number */ - if (rxseq != seq) { - brcmf_dbg(INFO, "(nextlen): rx_seq %d, expected %d\n", - seq, rxseq); - bus->sdcnt.rx_badseq++; - rxseq = seq; - } - - /* Check window for sanity */ - if ((u8) (txmax - bus->tx_seq) > 0x40) { - brcmf_dbg(ERROR, "got unlikely tx max %d with tx_seq %d\n", - txmax, bus->tx_seq); - txmax = bus->tx_seq + 2; - } - bus->tx_max = txmax; - - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(), - rxbuf, len, "Rx Data:\n"); - brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && - BRCMF_DATA_ON()) && - BRCMF_HDRS_ON(), + brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(), bus->rxhdr, SDPCM_HDRLEN, "RxHdr:\n"); - if (chan == SDPCM_CONTROL_CHANNEL) { - brcmf_dbg(ERROR, "(nextlen): readahead on control packet %d?\n", - seq); - /* Force retry w/normal header read */ - bus->nextlen = 0; - brcmf_sdbrcm_rxfail(bus, false, true); - brcmf_sdbrcm_pktfree2(bus, pkt); - continue; + if (!brcmf_sdio_hdparser(bus, bus->rxhdr, rd)) { + if (!bus->rxpending) + break; + else + continue; } - /* Validate data offset */ - if ((doff < SDPCM_HDRLEN) || (doff > len)) { - brcmf_dbg(ERROR, "(nextlen): bad data offset %d: HW len %d min %d\n", - doff, len, SDPCM_HDRLEN); - brcmf_sdbrcm_rxfail(bus, false, false); - brcmf_sdbrcm_pktfree2(bus, pkt); + if (rd->channel == SDPCM_CONTROL_CHANNEL) { + brcmf_sdbrcm_read_control(bus, bus->rxhdr, + rd->len, + rd->dat_offset); + /* prepare the descriptor for the next read */ + rd->len = rd->len_nxtfrm << 4; + rd->len_nxtfrm = 0; + /* treat all packet as event if we don't know */ + rd->channel = SDPCM_EVENT_CHANNEL; continue; } - - /* All done with this one -- now deliver the packet */ - goto deliver; - } - - /* Read frame header (hardware and software) */ - sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad, - SDIO_FUNC_2, F2SYNC, bus->rxhdr, - BRCMF_FIRSTREAD); - bus->sdcnt.f2rxhdrs++; - - if (sdret < 0) { - brcmf_dbg(ERROR, "RXHEADER FAILED: %d\n", sdret); - bus->sdcnt.rx_hdrfail++; - brcmf_sdbrcm_rxfail(bus, true, true); - continue; - } - brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(), - bus->rxhdr, SDPCM_HDRLEN, "RxHdr:\n"); - - - /* Extract hardware header fields */ - len = get_unaligned_le16(bus->rxhdr); - check = get_unaligned_le16(bus->rxhdr + sizeof(u16)); - - /* All zeros means no more frames */ - if (!(len | check)) { - *finished = true; - break; - } - - /* Validate check bytes */ - if ((u16) ~(len ^ check)) { - brcmf_dbg(ERROR, "HW hdr err: len/check 0x%04x/0x%04x\n", - len, check); - bus->sdcnt.rx_badhdr++; - brcmf_sdbrcm_rxfail(bus, false, false); - continue; - } - - /* Validate frame length */ - if (len < SDPCM_HDRLEN) { - brcmf_dbg(ERROR, "HW hdr length invalid: %d\n", len); - continue; - } - - /* Extract software header fields */ - chan = SDPCM_PACKET_CHANNEL(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); - seq = SDPCM_PACKET_SEQUENCE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); - doff = SDPCM_DOFFSET_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); - txmax = SDPCM_WINDOW_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); - - /* Validate data offset */ - if ((doff < SDPCM_HDRLEN) || (doff > len)) { - brcmf_dbg(ERROR, "Bad data offset %d: HW len %d, min %d seq %d\n", - doff, len, SDPCM_HDRLEN, seq); - bus->sdcnt.rx_badhdr++; - brcmf_sdbrcm_rxfail(bus, false, false); - continue; - } - - /* Save the readahead length if there is one */ - bus->nextlen = - bus->rxhdr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; - if ((bus->nextlen << 4) > MAX_RX_DATASZ) { - brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n", - bus->nextlen, seq); - bus->nextlen = 0; - } - - /* Handle Flow Control */ - fcbits = SDPCM_FCMASK_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); - - if (bus->flowcontrol != fcbits) { - if (~bus->flowcontrol & fcbits) - bus->sdcnt.fc_xoff++; - - if (bus->flowcontrol & ~fcbits) - bus->sdcnt.fc_xon++; - - bus->sdcnt.fc_rcvd++; - bus->flowcontrol = fcbits; - } - - /* Check and update sequence number */ - if (rxseq != seq) { - brcmf_dbg(INFO, "rx_seq %d, expected %d\n", seq, rxseq); - bus->sdcnt.rx_badseq++; - rxseq = seq; - } - - /* Check window for sanity */ - if ((u8) (txmax - bus->tx_seq) > 0x40) { - brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n", - txmax, bus->tx_seq); - txmax = bus->tx_seq + 2; - } - bus->tx_max = txmax; - - /* Call a separate function for control frames */ - if (chan == SDPCM_CONTROL_CHANNEL) { - brcmf_sdbrcm_read_control(bus, bus->rxhdr, len, doff); - continue; - } - - /* precondition: chan is either SDPCM_DATA_CHANNEL, - SDPCM_EVENT_CHANNEL, SDPCM_TEST_CHANNEL or - SDPCM_GLOM_CHANNEL */ - - /* Length to read */ - rdlen = (len > BRCMF_FIRSTREAD) ? (len - BRCMF_FIRSTREAD) : 0; - - /* May pad read to blocksize for efficiency */ - if (bus->roundup && bus->blocksize && - (rdlen > bus->blocksize)) { - pad = bus->blocksize - (rdlen % bus->blocksize); - if ((pad <= bus->roundup) && (pad < bus->blocksize) && - ((rdlen + pad + BRCMF_FIRSTREAD) < MAX_RX_DATASZ)) - rdlen += pad; - } else if (rdlen % BRCMF_SDALIGN) { - rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN); + rd->len_left = rd->len > BRCMF_FIRSTREAD ? + rd->len - BRCMF_FIRSTREAD : 0; + head_read = BRCMF_FIRSTREAD; } - /* Satisfy length-alignment requirements */ - if (rdlen & (ALIGNMENT - 1)) - rdlen = roundup(rdlen, ALIGNMENT); - - if ((rdlen + BRCMF_FIRSTREAD) > MAX_RX_DATASZ) { - /* Too long -- skip this frame */ - brcmf_dbg(ERROR, "too long: len %d rdlen %d\n", - len, rdlen); - bus->sdiodev->bus_if->dstats.rx_errors++; - bus->sdcnt.rx_toolong++; - brcmf_sdbrcm_rxfail(bus, false, false); - continue; - } + brcmf_pad(bus, &pad, &rd->len_left); - pkt = brcmu_pkt_buf_get_skb(rdlen + - BRCMF_FIRSTREAD + BRCMF_SDALIGN); + pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read + + BRCMF_SDALIGN); if (!pkt) { /* Give up on data, request rtx of events */ - brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: rdlen %d chan %d\n", - rdlen, chan); + brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed\n"); bus->sdiodev->bus_if->dstats.rx_dropped++; - brcmf_sdbrcm_rxfail(bus, false, RETRYCHAN(chan)); + brcmf_sdbrcm_rxfail(bus, false, + RETRYCHAN(rd->channel)); continue; } + skb_pull(pkt, head_read); + pkt_align(pkt, rd->len_left, BRCMF_SDALIGN); - /* Leave room for what we already read, and align remainder */ - skb_pull(pkt, BRCMF_FIRSTREAD); - pkt_align(pkt, rdlen, BRCMF_SDALIGN); - - /* Read the remaining frame data */ sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad, SDIO_FUNC_2, F2SYNC, pkt); bus->sdcnt.f2rxdata++; if (sdret < 0) { - brcmf_dbg(ERROR, "read %d %s bytes failed: %d\n", rdlen, - ((chan == SDPCM_EVENT_CHANNEL) ? "event" - : ((chan == SDPCM_DATA_CHANNEL) ? "data" - : "test")), sdret); + brcmf_dbg(ERROR, "read %d bytes from channel %d failed: %d\n", + rd->len, rd->channel, sdret); brcmu_pkt_buf_free_skb(pkt); bus->sdiodev->bus_if->dstats.rx_errors++; - brcmf_sdbrcm_rxfail(bus, true, RETRYCHAN(chan)); + brcmf_sdbrcm_rxfail(bus, true, + RETRYCHAN(rd->channel)); continue; } - /* Copy the already-read portion */ - skb_push(pkt, BRCMF_FIRSTREAD); - memcpy(pkt->data, bus->rxhdr, BRCMF_FIRSTREAD); + if (head_read) { + skb_push(pkt, head_read); + memcpy(pkt->data, bus->rxhdr, head_read); + head_read = 0; + } else { + memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN); + rd_new.seq_num = rd->seq_num; + if (!brcmf_sdio_hdparser(bus, bus->rxhdr, &rd_new)) { + rd->len = 0; + brcmu_pkt_buf_free_skb(pkt); + } + bus->sdcnt.rx_readahead_cnt++; + if (rd->len != roundup(rd_new.len, 16)) { + brcmf_dbg(ERROR, "frame length mismatch:read %d, should be %d\n", + rd->len, + roundup(rd_new.len, 16) >> 4); + rd->len = 0; + brcmf_sdbrcm_rxfail(bus, true, true); + brcmu_pkt_buf_free_skb(pkt); + continue; + } + rd->len_nxtfrm = rd_new.len_nxtfrm; + rd->channel = rd_new.channel; + rd->dat_offset = rd_new.dat_offset; + + brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && + BRCMF_DATA_ON()) && + BRCMF_HDRS_ON(), + bus->rxhdr, SDPCM_HDRLEN, + "RxHdr:\n"); + + if (rd_new.channel == SDPCM_CONTROL_CHANNEL) { + brcmf_dbg(ERROR, "readahead on control packet %d?\n", + rd_new.seq_num); + /* Force retry w/normal header read */ + rd->len = 0; + brcmf_sdbrcm_rxfail(bus, false, true); + brcmu_pkt_buf_free_skb(pkt); + continue; + } + } brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(), - pkt->data, len, "Rx Data:\n"); + pkt->data, rd->len, "Rx Data:\n"); -deliver: /* Save superframe descriptor and allocate packet frame */ - if (chan == SDPCM_GLOM_CHANNEL) { + if (rd->channel == SDPCM_GLOM_CHANNEL) { if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) { brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n", - len); + rd->len); brcmf_dbg_hex_dump(BRCMF_GLOM_ON(), - pkt->data, len, + pkt->data, rd->len, "Glom Data:\n"); - __skb_trim(pkt, len); + __skb_trim(pkt, rd->len); skb_pull(pkt, SDPCM_HDRLEN); bus->glomd = pkt; } else { @@ -1996,12 +1755,23 @@ deliver: "descriptor!\n", __func__); brcmf_sdbrcm_rxfail(bus, false, false); } + /* prepare the descriptor for the next read */ + rd->len = rd->len_nxtfrm << 4; + rd->len_nxtfrm = 0; + /* treat all packet as event if we don't know */ + rd->channel = SDPCM_EVENT_CHANNEL; continue; } /* Fill in packet len and prio, deliver upward */ - __skb_trim(pkt, len); - skb_pull(pkt, doff); + __skb_trim(pkt, rd->len); + skb_pull(pkt, rd->dat_offset); + + /* prepare the descriptor for the next read */ + rd->len = rd->len_nxtfrm << 4; + rd->len_nxtfrm = 0; + /* treat all packet as event if we don't know */ + rd->channel = SDPCM_EVENT_CHANNEL; if (pkt->len == 0) { brcmu_pkt_buf_free_skb(pkt); @@ -2019,17 +1789,17 @@ deliver: brcmf_rx_packet(bus->sdiodev->dev, ifidx, pkt); down(&bus->sdsem); } + rxcount = maxframes - rxleft; /* Message if we hit the limit */ if (!rxleft) - brcmf_dbg(DATA, "hit rx limit of %d frames\n", - maxframes); + brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes); else brcmf_dbg(DATA, "processed %d frames\n", rxcount); /* Back off rxseq if awaiting rtx, update rx_seq */ if (bus->rxskip) - rxseq--; - bus->rx_seq = rxseq; + rd->seq_num--; + bus->rx_seq = rd->seq_num; return rxcount; } @@ -2227,7 +1997,7 @@ static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes) if (ret != 0) break; if (intstatus & bus->hostintmask) - bus->ipend = true; + atomic_set(&bus->ipend, 1); } } @@ -2235,8 +2005,8 @@ static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes) if (bus->sdiodev->bus_if->drvr_up && (bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) && bus->txoff && (pktq_len(&bus->txq) < TXLOW)) { - bus->txoff = OFF; - brcmf_txflowcontrol(bus->sdiodev->dev, 0, OFF); + bus->txoff = false; + brcmf_txflowblock(bus->sdiodev->dev, false); } return cnt; @@ -2259,16 +2029,8 @@ static void brcmf_sdbrcm_bus_stop(struct device *dev) bus->watchdog_tsk = NULL; } - if (bus->dpc_tsk && bus->dpc_tsk != current) { - send_sig(SIGTERM, bus->dpc_tsk, 1); - kthread_stop(bus->dpc_tsk); - bus->dpc_tsk = NULL; - } - down(&bus->sdsem); - bus_wake(bus); - /* Enable clock for device interrupts */ brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); @@ -2327,7 +2089,7 @@ static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus) unsigned long flags; spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags); - if (!bus->sdiodev->irq_en && !bus->ipend) { + if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) { enable_irq(bus->sdiodev->irq); bus->sdiodev->irq_en = true; } @@ -2339,21 +2101,69 @@ static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus) } #endif /* CONFIG_BRCMFMAC_SDIO_OOB */ -static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) +static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus) { - u32 intstatus, newstatus = 0; + struct list_head *new_hd; + unsigned long flags; + + if (in_interrupt()) + new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC); + else + new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL); + if (new_hd == NULL) + return; + + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + list_add_tail(new_hd, &bus->dpc_tsklst); + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); +} + +static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus) +{ + u8 idx; + u32 addr; + unsigned long val; + int n, ret; + + idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV); + addr = bus->ci->c_inf[idx].base + + offsetof(struct sdpcmd_regs, intstatus); + + ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, false); + bus->sdcnt.f1regdata++; + if (ret != 0) + val = 0; + + val &= bus->hostintmask; + atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE)); + + /* Clear interrupts */ + if (val) { + ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, true); + bus->sdcnt.f1regdata++; + } + + if (ret) { + atomic_set(&bus->intstatus, 0); + } else if (val) { + for_each_set_bit(n, &val, 32) + set_bit(n, (unsigned long *)&bus->intstatus.counter); + } + + return ret; +} + +static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) +{ + u32 newstatus = 0; + unsigned long intstatus; uint rxlimit = bus->rxbound; /* Rx frames to read before resched */ uint txlimit = bus->txbound; /* Tx frames to send before resched */ uint framecnt = 0; /* Temporary counter of tx/rx frames */ - bool rxdone = true; /* Flag for no more read data */ - bool resched = false; /* Flag indicating resched wanted */ - int err; + int err = 0, n; brcmf_dbg(TRACE, "Enter\n"); - /* Start with leftover status bits */ - intstatus = bus->intstatus; - down(&bus->sdsem); /* If waiting for HTAVAIL, check status */ @@ -2399,39 +2209,22 @@ static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN; } bus->clkstate = CLK_AVAIL; - } else { - goto clkwait; } } - bus_wake(bus); - /* Make sure backplane clock is on */ brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true); - if (bus->clkstate == CLK_PENDING) - goto clkwait; /* Pending interrupt indicates new device status */ - if (bus->ipend) { - bus->ipend = false; - err = r_sdreg32(bus, &newstatus, - offsetof(struct sdpcmd_regs, intstatus)); - bus->sdcnt.f1regdata++; - if (err != 0) - newstatus = 0; - newstatus &= bus->hostintmask; - bus->fcstate = !!(newstatus & I_HMB_FC_STATE); - if (newstatus) { - err = w_sdreg32(bus, newstatus, - offsetof(struct sdpcmd_regs, - intstatus)); - bus->sdcnt.f1regdata++; - } + if (atomic_read(&bus->ipend) > 0) { + atomic_set(&bus->ipend, 0); + sdio_claim_host(bus->sdiodev->func[1]); + err = brcmf_sdio_intr_rstatus(bus); + sdio_release_host(bus->sdiodev->func[1]); } - /* Merge new bits with previous */ - intstatus |= newstatus; - bus->intstatus = 0; + /* Start with leftover status bits */ + intstatus = atomic_xchg(&bus->intstatus, 0); /* Handle flow-control change: read new state in case our ack * crossed another change interrupt. If change still set, assume @@ -2445,8 +2238,8 @@ static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) err = r_sdreg32(bus, &newstatus, offsetof(struct sdpcmd_regs, intstatus)); bus->sdcnt.f1regdata += 2; - bus->fcstate = - !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)); + atomic_set(&bus->fcstate, + !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE))); intstatus |= (newstatus & bus->hostintmask); } @@ -2483,32 +2276,34 @@ static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) intstatus &= ~I_HMB_FRAME_IND; /* On frame indication, read available frames */ - if (PKT_AVAILABLE()) { - framecnt = brcmf_sdbrcm_readframes(bus, rxlimit, &rxdone); - if (rxdone || bus->rxskip) + if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) { + framecnt = brcmf_sdio_readframes(bus, rxlimit); + if (!bus->rxpending) intstatus &= ~I_HMB_FRAME_IND; rxlimit -= min(framecnt, rxlimit); } /* Keep still-pending events for next scheduling */ - bus->intstatus = intstatus; + if (intstatus) { + for_each_set_bit(n, &intstatus, 32) + set_bit(n, (unsigned long *)&bus->intstatus.counter); + } -clkwait: brcmf_sdbrcm_clrintr(bus); if (data_ok(bus) && bus->ctrl_frame_stat && (bus->clkstate == CLK_AVAIL)) { - int ret, i; + int i; - ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad, + err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad, SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf, (u32) bus->ctrl_frame_len); - if (ret < 0) { + if (err < 0) { /* On failure, abort the command and terminate the frame */ brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n", - ret); + err); bus->sdcnt.tx_sderrs++; brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2); @@ -2530,42 +2325,34 @@ clkwait: break; } - } - if (ret == 0) + } else { bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP; - - brcmf_dbg(INFO, "Return_dpc value is : %d\n", ret); + } bus->ctrl_frame_stat = false; brcmf_sdbrcm_wait_event_wakeup(bus); } /* Send queued frames (limit 1 if rx may still be pending) */ - else if ((bus->clkstate == CLK_AVAIL) && !bus->fcstate && + else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit && data_ok(bus)) { - framecnt = rxdone ? txlimit : min(txlimit, bus->txminmax); + framecnt = bus->rxpending ? min(txlimit, bus->txminmax) : + txlimit; framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt); txlimit -= framecnt; } - /* Resched if events or tx frames are pending, - else await next interrupt */ - /* On failed register access, all bets are off: - no resched or interrupts */ if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) { brcmf_dbg(ERROR, "failed backplane access over SDIO, halting operation\n"); bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN; - bus->intstatus = 0; - } else if (bus->clkstate == CLK_PENDING) { - brcmf_dbg(INFO, "rescheduled due to CLK_PENDING awaiting I_CHIPACTIVE interrupt\n"); - resched = true; - } else if (bus->intstatus || bus->ipend || - (!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) - && data_ok(bus)) || PKT_AVAILABLE()) { - resched = true; + atomic_set(&bus->intstatus, 0); + } else if (atomic_read(&bus->intstatus) || + atomic_read(&bus->ipend) > 0 || + (!atomic_read(&bus->fcstate) && + brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && + data_ok(bus)) || PKT_AVAILABLE()) { + brcmf_sdbrcm_adddpctsk(bus); } - bus->dpc_sched = resched; - /* If we're done for now, turn off clock request. */ if ((bus->clkstate != CLK_PENDING) && bus->idletime == BRCMF_IDLE_IMMEDIATE) { @@ -2574,65 +2361,6 @@ clkwait: } up(&bus->sdsem); - - return resched; -} - -static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus) -{ - struct list_head *new_hd; - unsigned long flags; - - if (in_interrupt()) - new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC); - else - new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL); - if (new_hd == NULL) - return; - - spin_lock_irqsave(&bus->dpc_tl_lock, flags); - list_add_tail(new_hd, &bus->dpc_tsklst); - spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); -} - -static int brcmf_sdbrcm_dpc_thread(void *data) -{ - struct brcmf_sdio *bus = (struct brcmf_sdio *) data; - struct list_head *cur_hd, *tmp_hd; - unsigned long flags; - - allow_signal(SIGTERM); - /* Run until signal received */ - while (1) { - if (kthread_should_stop()) - break; - - if (list_empty(&bus->dpc_tsklst)) - if (wait_for_completion_interruptible(&bus->dpc_wait)) - break; - - spin_lock_irqsave(&bus->dpc_tl_lock, flags); - list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) { - spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); - - if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) { - /* after stopping the bus, exit thread */ - brcmf_sdbrcm_bus_stop(bus->sdiodev->dev); - bus->dpc_tsk = NULL; - spin_lock_irqsave(&bus->dpc_tl_lock, flags); - break; - } - - if (brcmf_sdbrcm_dpc(bus)) - brcmf_sdbrcm_adddpctsk(bus); - - spin_lock_irqsave(&bus->dpc_tl_lock, flags); - list_del(cur_hd); - kfree(cur_hd); - } - spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); - } - return 0; } static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt) @@ -2642,6 +2370,7 @@ static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt) struct brcmf_bus *bus_if = dev_get_drvdata(dev); struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; struct brcmf_sdio *bus = sdiodev->bus; + unsigned long flags; brcmf_dbg(TRACE, "Enter\n"); @@ -2672,21 +2401,23 @@ static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt) spin_unlock_bh(&bus->txqlock); if (pktq_len(&bus->txq) >= TXHI) { - bus->txoff = ON; - brcmf_txflowcontrol(bus->sdiodev->dev, 0, ON); + bus->txoff = true; + brcmf_txflowblock(bus->sdiodev->dev, true); } #ifdef DEBUG if (pktq_plen(&bus->txq, prec) > qcount[prec]) qcount[prec] = pktq_plen(&bus->txq, prec); #endif - /* Schedule DPC if needed to send queued packet(s) */ - if (!bus->dpc_sched) { - bus->dpc_sched = true; - if (bus->dpc_tsk) { - brcmf_sdbrcm_adddpctsk(bus); - complete(&bus->dpc_wait); - } + + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + if (list_empty(&bus->dpc_tsklst)) { + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); + + brcmf_sdbrcm_adddpctsk(bus); + queue_work(bus->brcmf_wq, &bus->datawork); + } else { + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); } return ret; @@ -2707,6 +2438,8 @@ brcmf_sdbrcm_membytes(struct brcmf_sdio *bus, bool write, u32 address, u8 *data, else dsize = size; + sdio_claim_host(bus->sdiodev->func[1]); + /* Set the backplane window to include the start address */ bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address); if (bcmerror) { @@ -2748,6 +2481,8 @@ xfer_done: brcmf_dbg(ERROR, "FAILED to set window back to 0x%x\n", bus->sdiodev->sbwad); + sdio_release_host(bus->sdiodev->func[1]); + return bcmerror; } @@ -2882,6 +2617,7 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen) struct brcmf_bus *bus_if = dev_get_drvdata(dev); struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; struct brcmf_sdio *bus = sdiodev->bus; + unsigned long flags; brcmf_dbg(TRACE, "Enter\n"); @@ -2918,8 +2654,6 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen) /* Need to lock here to protect txseq and SDIO tx calls */ down(&bus->sdsem); - bus_wake(bus); - /* Make sure backplane clock is on */ brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); @@ -2967,9 +2701,15 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen) } while (ret < 0 && retries++ < TXRETRIES); } - if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) && !bus->dpc_sched) { + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) && + list_empty(&bus->dpc_tsklst)) { + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); + bus->activity = false; brcmf_sdbrcm_clkctl(bus, CLK_NONE, true); + } else { + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); } up(&bus->sdsem); @@ -3774,23 +3514,20 @@ void brcmf_sdbrcm_isr(void *arg) } /* Count the interrupt call */ bus->sdcnt.intrcount++; - bus->ipend = true; - - /* Shouldn't get this interrupt if we're sleeping? */ - if (bus->sleeping) { - brcmf_dbg(ERROR, "INTERRUPT WHILE SLEEPING??\n"); - return; - } + if (in_interrupt()) + atomic_set(&bus->ipend, 1); + else + if (brcmf_sdio_intr_rstatus(bus)) { + brcmf_dbg(ERROR, "failed backplane access\n"); + bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN; + } /* Disable additional interrupts (is this needed now)? */ if (!bus->intr) brcmf_dbg(ERROR, "isr w/o interrupt configured!\n"); - bus->dpc_sched = true; - if (bus->dpc_tsk) { - brcmf_sdbrcm_adddpctsk(bus); - complete(&bus->dpc_wait); - } + brcmf_sdbrcm_adddpctsk(bus); + queue_work(bus->brcmf_wq, &bus->datawork); } static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) @@ -3798,13 +3535,10 @@ static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) #ifdef DEBUG struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev); #endif /* DEBUG */ + unsigned long flags; brcmf_dbg(TIMER, "Enter\n"); - /* Ignore the timer if simulating bus down */ - if (bus->sleeping) - return false; - down(&bus->sdsem); /* Poll period: check device if appropriate. */ @@ -3818,27 +3552,30 @@ static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) if (!bus->intr || (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) { - if (!bus->dpc_sched) { + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + if (list_empty(&bus->dpc_tsklst)) { u8 devpend; + spin_unlock_irqrestore(&bus->dpc_tl_lock, + flags); devpend = brcmf_sdio_regrb(bus->sdiodev, SDIO_CCCR_INTx, NULL); intstatus = devpend & (INTR_STATUS_FUNC1 | INTR_STATUS_FUNC2); + } else { + spin_unlock_irqrestore(&bus->dpc_tl_lock, + flags); } /* If there is something, make like the ISR and schedule the DPC */ if (intstatus) { bus->sdcnt.pollcnt++; - bus->ipend = true; + atomic_set(&bus->ipend, 1); - bus->dpc_sched = true; - if (bus->dpc_tsk) { - brcmf_sdbrcm_adddpctsk(bus); - complete(&bus->dpc_wait); - } + brcmf_sdbrcm_adddpctsk(bus); + queue_work(bus->brcmf_wq, &bus->datawork); } } @@ -3876,11 +3613,13 @@ static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) up(&bus->sdsem); - return bus->ipend; + return (atomic_read(&bus->ipend) > 0); } static bool brcmf_sdbrcm_chipmatch(u16 chipid) { + if (chipid == BCM43241_CHIP_ID) + return true; if (chipid == BCM4329_CHIP_ID) return true; if (chipid == BCM4330_CHIP_ID) @@ -3890,6 +3629,26 @@ static bool brcmf_sdbrcm_chipmatch(u16 chipid) return false; } +static void brcmf_sdio_dataworker(struct work_struct *work) +{ + struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio, + datawork); + struct list_head *cur_hd, *tmp_hd; + unsigned long flags; + + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) { + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); + + brcmf_sdbrcm_dpc(bus); + + spin_lock_irqsave(&bus->dpc_tl_lock, flags); + list_del(cur_hd); + kfree(cur_hd); + } + spin_unlock_irqrestore(&bus->dpc_tl_lock, flags); +} + static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus) { brcmf_dbg(TRACE, "Enter\n"); @@ -4022,7 +3781,6 @@ static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus) SDIO_FUNC_ENABLE_1, NULL); bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN; - bus->sleeping = false; bus->rxflow = false; /* Done with backplane-dependent accesses, can drop clock... */ @@ -4103,6 +3861,9 @@ static void brcmf_sdbrcm_release(struct brcmf_sdio *bus) /* De-register interrupt handler */ brcmf_sdio_intr_unregister(bus->sdiodev); + cancel_work_sync(&bus->datawork); + destroy_workqueue(bus->brcmf_wq); + if (bus->sdiodev->bus_if->drvr) { brcmf_detach(bus->sdiodev->dev); brcmf_sdbrcm_release_dongle(bus); @@ -4142,8 +3903,6 @@ void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev) bus->rxbound = BRCMF_RXBOUND; bus->txminmax = BRCMF_TXMINMAX; bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1; - bus->usebufpool = false; /* Use bufpool if allocated, - else use locally malloced rxbuf */ /* attempt to attach to the dongle */ if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) { @@ -4155,6 +3914,13 @@ void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev) init_waitqueue_head(&bus->ctrl_wait); init_waitqueue_head(&bus->dcmd_resp_wait); + bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq"); + if (bus->brcmf_wq == NULL) { + brcmf_dbg(ERROR, "insufficient memory to create txworkqueue\n"); + goto fail; + } + INIT_WORK(&bus->datawork, brcmf_sdio_dataworker); + /* Set up the watchdog timer */ init_timer(&bus->timer); bus->timer.data = (unsigned long)bus; @@ -4172,15 +3938,8 @@ void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev) bus->watchdog_tsk = NULL; } /* Initialize DPC thread */ - init_completion(&bus->dpc_wait); INIT_LIST_HEAD(&bus->dpc_tsklst); spin_lock_init(&bus->dpc_tl_lock); - bus->dpc_tsk = kthread_run(brcmf_sdbrcm_dpc_thread, - bus, "brcmf_dpc"); - if (IS_ERR(bus->dpc_tsk)) { - pr_warn("brcmf_dpc thread failed to start\n"); - bus->dpc_tsk = NULL; - } /* Assign bus interface call back */ bus->sdiodev->bus_if->brcmf_bus_stop = brcmf_sdbrcm_bus_stop; |
