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158 lines
5.0 KiB
Diff
158 lines
5.0 KiB
Diff
From: Hante Meuleman <meuleman@broadcom.com>
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Date: Fri, 6 Mar 2015 18:40:39 +0100
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Subject: [PATCH] brcmfmac: Simplify watchdog sleep.
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The watchdog thread is used to put the SDIO bus to sleep when the
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system is idling. This patch simplifies the way it is determined
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when sleep can be entered.
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Reviewed-by: Arend Van Spriel <arend@broadcom.com>
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Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
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Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
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Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
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Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
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Signed-off-by: Arend van Spriel <arend@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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--- a/drivers/net/wireless/brcm80211/brcmfmac/sdio.c
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+++ b/drivers/net/wireless/brcm80211/brcmfmac/sdio.c
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@@ -485,10 +485,9 @@ struct brcmf_sdio {
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#endif /* DEBUG */
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uint clkstate; /* State of sd and backplane clock(s) */
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- bool activity; /* Activity flag for clock down */
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s32 idletime; /* Control for activity timeout */
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- s32 idlecount; /* Activity timeout counter */
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- s32 idleclock; /* How to set bus driver when idle */
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+ s32 idlecount; /* Activity timeout counter */
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+ s32 idleclock; /* How to set bus driver when idle */
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bool rxflow_mode; /* Rx flow control mode */
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bool rxflow; /* Is rx flow control on */
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bool alp_only; /* Don't use HT clock (ALP only) */
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@@ -511,6 +510,7 @@ struct brcmf_sdio {
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struct workqueue_struct *brcmf_wq;
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struct work_struct datawork;
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atomic_t dpc_tskcnt;
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+ atomic_t dpc_running;
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bool txoff; /* Transmit flow-controlled */
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struct brcmf_sdio_count sdcnt;
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@@ -959,13 +959,8 @@ static int brcmf_sdio_clkctl(struct brcm
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brcmf_dbg(SDIO, "Enter\n");
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/* Early exit if we're already there */
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- if (bus->clkstate == target) {
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- if (target == CLK_AVAIL) {
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- brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
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- bus->activity = true;
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- }
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+ if (bus->clkstate == target)
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return 0;
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- }
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switch (target) {
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case CLK_AVAIL:
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@@ -975,7 +970,6 @@ static int brcmf_sdio_clkctl(struct brcm
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/* Now request HT Avail on the backplane */
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brcmf_sdio_htclk(bus, true, pendok);
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brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
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- bus->activity = true;
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break;
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case CLK_SDONLY:
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@@ -1024,17 +1018,6 @@ brcmf_sdio_bus_sleep(struct brcmf_sdio *
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/* Going to sleep */
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if (sleep) {
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- /* Don't sleep if something is pending */
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- if (atomic_read(&bus->intstatus) ||
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- atomic_read(&bus->ipend) > 0 ||
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- bus->ctrl_frame_stat ||
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- (!atomic_read(&bus->fcstate) &&
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- brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
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- data_ok(bus))) {
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- err = -EBUSY;
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- goto done;
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- }
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-
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clkcsr = brcmf_sdiod_regrb(bus->sdiodev,
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SBSDIO_FUNC1_CHIPCLKCSR,
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&err);
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@@ -1045,11 +1028,7 @@ brcmf_sdio_bus_sleep(struct brcmf_sdio *
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SBSDIO_ALP_AVAIL_REQ, &err);
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}
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err = brcmf_sdio_kso_control(bus, false);
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- /* disable watchdog */
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- if (!err)
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- brcmf_sdio_wd_timer(bus, 0);
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} else {
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- bus->idlecount = 0;
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err = brcmf_sdio_kso_control(bus, true);
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}
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if (err) {
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@@ -3566,7 +3545,7 @@ void brcmf_sdio_isr(struct brcmf_sdio *b
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queue_work(bus->brcmf_wq, &bus->datawork);
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}
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-static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
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+static void brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
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{
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brcmf_dbg(TIMER, "Enter\n");
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@@ -3627,22 +3606,21 @@ static bool brcmf_sdio_bus_watchdog(stru
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#endif /* DEBUG */
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/* On idle timeout clear activity flag and/or turn off clock */
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- if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
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- if (++bus->idlecount >= bus->idletime) {
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+ if ((atomic_read(&bus->dpc_tskcnt) == 0) &&
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+ (atomic_read(&bus->dpc_running) == 0) &&
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+ (bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
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+ bus->idlecount++;
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+ if (bus->idlecount > bus->idletime) {
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+ brcmf_dbg(SDIO, "idle\n");
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+ sdio_claim_host(bus->sdiodev->func[1]);
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+ brcmf_sdio_wd_timer(bus, 0);
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bus->idlecount = 0;
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- if (bus->activity) {
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- bus->activity = false;
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- brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
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- } else {
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- brcmf_dbg(SDIO, "idle\n");
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- sdio_claim_host(bus->sdiodev->func[1]);
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- brcmf_sdio_bus_sleep(bus, true, false);
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- sdio_release_host(bus->sdiodev->func[1]);
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- }
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+ brcmf_sdio_bus_sleep(bus, true, false);
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+ sdio_release_host(bus->sdiodev->func[1]);
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}
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+ } else {
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+ bus->idlecount = 0;
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}
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-
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- return (atomic_read(&bus->ipend) > 0);
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}
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static void brcmf_sdio_dataworker(struct work_struct *work)
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@@ -3651,8 +3629,11 @@ static void brcmf_sdio_dataworker(struct
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datawork);
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while (atomic_read(&bus->dpc_tskcnt)) {
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+ atomic_set(&bus->dpc_running, 1);
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atomic_set(&bus->dpc_tskcnt, 0);
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brcmf_sdio_dpc(bus);
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+ bus->idlecount = 0;
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+ atomic_set(&bus->dpc_running, 0);
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}
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if (brcmf_sdiod_freezing(bus->sdiodev)) {
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brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DOWN);
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@@ -4154,6 +4135,7 @@ struct brcmf_sdio *brcmf_sdio_probe(stru
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}
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/* Initialize DPC thread */
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atomic_set(&bus->dpc_tskcnt, 0);
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+ atomic_set(&bus->dpc_running, 0);
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/* Assign bus interface call back */
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bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
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