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brcmfmac: use SDIO DPC for control frames.
Control frames are normally handled outside DPC, but sometimes within DPC. To simplify code always handle control within DPC. Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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@ -44,7 +44,8 @@
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#include "chip.h"
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#include "firmware.h"
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#define DCMD_RESP_TIMEOUT 2000 /* In milli second */
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#define DCMD_RESP_TIMEOUT 2000 /* In milli second */
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#define CTL_DONE_TIMEOUT 2000 /* In milli second */
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#ifdef DEBUG
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@ -495,9 +496,9 @@ struct brcmf_sdio {
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u8 *ctrl_frame_buf;
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u16 ctrl_frame_len;
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bool ctrl_frame_stat;
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int ctrl_frame_err;
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spinlock_t txq_lock; /* protect bus->txq */
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struct semaphore tx_seq_lock; /* protect bus->tx_seq */
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wait_queue_head_t ctrl_wait;
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wait_queue_head_t dcmd_resp_wait;
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@ -2376,8 +2377,6 @@ static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
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/* Send frames until the limit or some other event */
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for (cnt = 0; (cnt < maxframes) && data_ok(bus);) {
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pkt_num = 1;
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if (down_interruptible(&bus->tx_seq_lock))
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return cnt;
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if (bus->txglom)
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pkt_num = min_t(u8, bus->tx_max - bus->tx_seq,
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bus->sdiodev->txglomsz);
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@ -2393,13 +2392,10 @@ static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
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__skb_queue_tail(&pktq, pkt);
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}
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spin_unlock_bh(&bus->txq_lock);
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if (i == 0) {
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up(&bus->tx_seq_lock);
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if (i == 0)
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break;
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}
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ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL);
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up(&bus->tx_seq_lock);
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cnt += i;
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@ -2743,17 +2739,14 @@ static void brcmf_sdio_dpc(struct brcmf_sdio *bus)
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brcmf_sdio_clrintr(bus);
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if (bus->ctrl_frame_stat && (bus->clkstate == CLK_AVAIL) &&
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(down_interruptible(&bus->tx_seq_lock) == 0)) {
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if (data_ok(bus)) {
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sdio_claim_host(bus->sdiodev->func[1]);
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err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf,
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bus->ctrl_frame_len);
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sdio_release_host(bus->sdiodev->func[1]);
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bus->ctrl_frame_stat = false;
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brcmf_sdio_wait_event_wakeup(bus);
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}
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up(&bus->tx_seq_lock);
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data_ok(bus)) {
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sdio_claim_host(bus->sdiodev->func[1]);
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err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf,
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bus->ctrl_frame_len);
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sdio_release_host(bus->sdiodev->func[1]);
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bus->ctrl_frame_err = err;
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bus->ctrl_frame_stat = false;
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brcmf_sdio_wait_event_wakeup(bus);
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}
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/* Send queued frames (limit 1 if rx may still be pending) */
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if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
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@ -2965,43 +2958,30 @@ brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
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struct brcmf_bus *bus_if = dev_get_drvdata(dev);
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struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
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struct brcmf_sdio *bus = sdiodev->bus;
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int ret = -1;
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int ret;
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brcmf_dbg(TRACE, "Enter\n");
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if (down_interruptible(&bus->tx_seq_lock))
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return -EINTR;
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if (!data_ok(bus)) {
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brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
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bus->tx_max, bus->tx_seq);
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up(&bus->tx_seq_lock);
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/* Send from dpc */
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bus->ctrl_frame_buf = msg;
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bus->ctrl_frame_len = msglen;
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bus->ctrl_frame_stat = true;
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wait_event_interruptible_timeout(bus->ctrl_wait,
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!bus->ctrl_frame_stat,
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msecs_to_jiffies(2000));
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if (!bus->ctrl_frame_stat) {
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brcmf_dbg(SDIO, "ctrl_frame_stat == false\n");
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ret = 0;
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} else {
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brcmf_dbg(SDIO, "ctrl_frame_stat == true\n");
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bus->ctrl_frame_stat = false;
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if (down_interruptible(&bus->tx_seq_lock))
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return -EINTR;
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ret = -1;
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}
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/* Send from dpc */
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bus->ctrl_frame_buf = msg;
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bus->ctrl_frame_len = msglen;
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bus->ctrl_frame_stat = true;
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if (atomic_read(&bus->dpc_tskcnt) == 0) {
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atomic_inc(&bus->dpc_tskcnt);
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queue_work(bus->brcmf_wq, &bus->datawork);
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}
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if (ret == -1) {
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sdio_claim_host(bus->sdiodev->func[1]);
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brcmf_sdio_bus_sleep(bus, false, false);
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ret = brcmf_sdio_tx_ctrlframe(bus, msg, msglen);
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sdio_release_host(bus->sdiodev->func[1]);
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up(&bus->tx_seq_lock);
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wait_event_interruptible_timeout(bus->ctrl_wait, !bus->ctrl_frame_stat,
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msecs_to_jiffies(CTL_DONE_TIMEOUT));
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if (!bus->ctrl_frame_stat) {
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brcmf_dbg(SDIO, "ctrl_frame complete, err=%d\n",
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bus->ctrl_frame_err);
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ret = bus->ctrl_frame_err;
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} else {
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brcmf_dbg(SDIO, "ctrl_frame timeout\n");
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bus->ctrl_frame_stat = false;
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ret = -ETIMEDOUT;
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}
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if (ret)
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@ -3009,7 +2989,7 @@ brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
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else
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bus->sdcnt.tx_ctlpkts++;
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return ret ? -EIO : 0;
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return ret;
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}
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#ifdef DEBUG
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@ -4165,7 +4145,6 @@ struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
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spin_lock_init(&bus->rxctl_lock);
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spin_lock_init(&bus->txq_lock);
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sema_init(&bus->tx_seq_lock, 1);
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init_waitqueue_head(&bus->ctrl_wait);
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init_waitqueue_head(&bus->dcmd_resp_wait);
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