static void mlx5e_close_rq(struct mlx5e_rq *rq)
{
clear_bit(MLX5E_RQ_STATE_POST_WQES_ENABLE, &rq->state);
napi_synchronize(&rq->channel->napi); /* prevent mlx5e_post_rx_wqes */
mlx5e_modify_rq(rq, MLX5_RQC_STATE_RDY, MLX5_RQC_STATE_ERR);
while (!mlx5_wq_ll_is_empty(&rq->wq))
msleep(20);
/* avoid destroying rq before mlx5e_poll_rx_cq() is done with it */
napi_synchronize(&rq->channel->napi);
mlx5e_disable_rq(rq);
mlx5e_destroy_rq(rq);
}
static void mlx5e_close_sq(struct mlx5e_sq *sq)
{
clear_bit(MLX5E_SQ_STATE_WAKE_TXQ_ENABLE, &sq->state);
napi_synchronize(&sq->channel->napi); /* prevent netif_tx_wake_queue */
netif_tx_disable_queue(sq->txq);
/* ensure hw is notified of all pending wqes */
if (mlx5e_sq_has_room_for(sq, 1))
mlx5e_send_nop(sq);
mlx5e_modify_sq(sq, MLX5_SQC_STATE_RDY, MLX5_SQC_STATE_ERR);
while (sq->cc != sq->pc) /* wait till sq is empty */
msleep(20);
/* avoid destroying sq before mlx5e_poll_tx_cq() is done with it */
napi_synchronize(&sq->channel->napi);
mlx5e_disable_sq(sq);
mlx5e_destroy_sq(sq);
}
static void ath10k_ahb_hif_stop(struct ath10k *ar)
{
struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar);
ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif stop\n");
ath10k_ahb_irq_disable(ar);
synchronize_irq(ar_ahb->irq);
napi_synchronize(&ar->napi);
napi_disable(&ar->napi);
ath10k_pci_flush(ar);
}
/*
* We reset all the structures, and we reset the UMAC.
* After calling this routine, you're expected to reload
* the firmware.
*/
int wil_reset(struct wil6210_priv *wil)
{
int rc;
WARN_ON(!mutex_is_locked(&wil->mutex));
cancel_work_sync(&wil->disconnect_worker);
wil6210_disconnect(wil, NULL);
wil->status = 0; /* prevent NAPI from being scheduled */
if (test_bit(wil_status_napi_en, &wil->status)) {
napi_synchronize(&wil->napi_rx);
}
if (wil->scan_request) {
wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
wil->scan_request);
del_timer_sync(&wil->scan_timer);
cfg80211_scan_done(wil->scan_request, true);
wil->scan_request = NULL;
}
wil6210_disable_irq(wil);
wmi_event_flush(wil);
flush_workqueue(wil->wmi_wq_conn);
flush_workqueue(wil->wmi_wq);
/* TODO: put MAC in reset */
wil_target_reset(wil);
wil_rx_fini(wil);
/* init after reset */
wil->pending_connect_cid = -1;
reinit_completion(&wil->wmi_ready);
/* TODO: release MAC reset */
wil6210_enable_irq(wil);
/* we just started MAC, wait for FW ready */
rc = wil_wait_for_fw_ready(wil);
return rc;
}
static int wil_suspend_keep_radio_on(struct wil6210_priv *wil)
{
int rc = 0;
unsigned long data_comp_to;
wil_dbg_pm(wil, "suspend keep radio on\n");
/* Prevent handling of new tx and wmi commands */
rc = down_write_trylock(&wil->mem_lock);
if (!rc) {
wil_err(wil,
"device is busy. down_write_trylock failed, returned (0x%x)\n",
rc);
wil->suspend_stats.rejected_by_host++;
return -EBUSY;
}
set_bit(wil_status_suspending, wil->status);
up_write(&wil->mem_lock);
wil_pm_stop_all_net_queues(wil);
if (!wil_is_tx_idle(wil)) {
wil_dbg_pm(wil, "Pending TX data, reject suspend\n");
wil->suspend_stats.rejected_by_host++;
goto reject_suspend;
}
if (!wil->txrx_ops.is_rx_idle(wil)) {
wil_dbg_pm(wil, "Pending RX data, reject suspend\n");
wil->suspend_stats.rejected_by_host++;
goto reject_suspend;
}
if (!wil_is_wmi_idle(wil)) {
wil_dbg_pm(wil, "Pending WMI events, reject suspend\n");
wil->suspend_stats.rejected_by_host++;
goto reject_suspend;
}
/* Send WMI suspend request to the device */
rc = wmi_suspend(wil);
if (rc) {
wil_dbg_pm(wil, "wmi_suspend failed, reject suspend (%d)\n",
rc);
goto reject_suspend;
}
/* Wait for completion of the pending RX packets */
data_comp_to = jiffies + msecs_to_jiffies(WIL_DATA_COMPLETION_TO_MS);
if (test_bit(wil_status_napi_en, wil->status)) {
while (!wil->txrx_ops.is_rx_idle(wil)) {
if (time_after(jiffies, data_comp_to)) {
if (wil->txrx_ops.is_rx_idle(wil))
break;
wil_err(wil,
"TO waiting for idle RX, suspend failed\n");
wil->suspend_stats.r_on.failed_suspends++;
goto resume_after_fail;
}
wil_dbg_ratelimited(wil, "rx vring is not empty -> NAPI\n");
napi_synchronize(&wil->napi_rx);
msleep(20);
}
}
/* In case of pending WMI events, reject the suspend
* and resume the device.
* This can happen if the device sent the WMI events before
* approving the suspend.
*/
if (!wil_is_wmi_idle(wil)) {
wil_err(wil, "suspend failed due to pending WMI events\n");
wil->suspend_stats.r_on.failed_suspends++;
goto resume_after_fail;
}
wil_mask_irq(wil);
/* Disable device reset on PERST */
wil_s(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
if (wil->platform_ops.suspend) {
rc = wil->platform_ops.suspend(wil->platform_handle, true);
if (rc) {
wil_err(wil, "platform device failed to suspend (%d)\n",
rc);
wil->suspend_stats.r_on.failed_suspends++;
wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
wil_unmask_irq(wil);
goto resume_after_fail;
}
}
/* Save the current bus request to return to the same in resume */
wil->bus_request_kbps_pre_suspend = wil->bus_request_kbps;
wil6210_bus_request(wil, 0);
set_bit(wil_status_suspended, wil->status);
clear_bit(wil_status_suspending, wil->status);
return rc;
resume_after_fail:
set_bit(wil_status_resuming, wil->status);
clear_bit(wil_status_suspending, wil->status);
rc = wmi_resume(wil);
/* if resume succeeded, reject the suspend */
if (!rc) {
rc = -EBUSY;
wil_pm_wake_connected_net_queues(wil);
}
return rc;
reject_suspend:
clear_bit(wil_status_suspending, wil->status);
wil_pm_wake_connected_net_queues(wil);
return -EBUSY;
}
