static int wil_suspend_radio_off(struct wil6210_priv *wil)
{
int rc = 0;
bool active_ifaces;
wil_dbg_pm(wil, "suspend radio off\n");
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);
/* if netif up, hardware is alive, shut it down */
mutex_lock(&wil->vif_mutex);
active_ifaces = wil_has_active_ifaces(wil, true, false);
mutex_unlock(&wil->vif_mutex);
if (active_ifaces) {
rc = wil_down(wil);
if (rc) {
wil_err(wil, "wil_down : %d\n", rc);
wil->suspend_stats.r_off.failed_suspends++;
goto out;
}
}
/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
wil_disable_irq(wil);
if (wil->platform_ops.suspend) {
rc = wil->platform_ops.suspend(wil->platform_handle, false);
if (rc) {
wil_enable_irq(wil);
wil->suspend_stats.r_off.failed_suspends++;
goto out;
}
}
set_bit(wil_status_suspended, wil->status);
out:
clear_bit(wil_status_suspending, wil->status);
wil_dbg_pm(wil, "suspend radio off: %d\n", rc);
return rc;
}
static int wil_suspend_radio_off(struct wil6210_priv *wil)
{
int rc = 0;
bool active_ifaces;
wil_dbg_pm(wil, "suspend radio off\n");
set_bit(wil_status_suspending, wil->status);
if (test_bit(wil_status_collecting_dumps, wil->status)) {
/* Device collects crash dump, cancel the suspend */
wil_dbg_pm(wil, "reject suspend while collecting crash dump\n");
clear_bit(wil_status_suspending, wil->status);
wil->suspend_stats.rejected_by_host++;
return -EBUSY;
}
/* if netif up, hardware is alive, shut it down */
mutex_lock(&wil->vif_mutex);
active_ifaces = wil_has_active_ifaces(wil, true, false);
mutex_unlock(&wil->vif_mutex);
if (active_ifaces) {
rc = wil_down(wil);
if (rc) {
wil_err(wil, "wil_down : %d\n", rc);
wil->suspend_stats.r_off.failed_suspends++;
goto out;
}
}
/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
wil_disable_irq(wil);
if (wil->platform_ops.suspend) {
rc = wil->platform_ops.suspend(wil->platform_handle, false);
if (rc) {
wil_enable_irq(wil);
wil->suspend_stats.r_off.failed_suspends++;
goto out;
}
}
set_bit(wil_status_suspended, wil->status);
out:
clear_bit(wil_status_suspending, wil->status);
wil_dbg_pm(wil, "suspend radio off: %d\n", rc);
return rc;
}
static int wil_resume_radio_off(struct wil6210_priv *wil)
{
int rc = 0;
bool active_ifaces;
wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
wil_enable_irq(wil);
/* if any netif up, bring hardware up
* During open(), IFF_UP set after actual device method
* invocation. This prevent recursive call to wil_up()
* wil_status_suspended will be cleared in wil_reset
*/
mutex_lock(&wil->vif_mutex);
active_ifaces = wil_has_active_ifaces(wil, true, false);
mutex_unlock(&wil->vif_mutex);
if (active_ifaces)
rc = wil_up(wil);
else
clear_bit(wil_status_suspended, wil->status);
return rc;
}
int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
{
int rc = 0, i;
bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
wil->fw_capabilities);
bool active_ifaces;
wil_dbg_pm(wil, "can_suspend: %s\n", is_runtime ? "runtime" : "system");
if (wmi_only || debug_fw) {
wil_dbg_pm(wil, "Deny any suspend - %s mode\n",
wmi_only ? "wmi_only" : "debug_fw");
rc = -EBUSY;
goto out;
}
if (is_runtime && !wil->platform_ops.suspend) {
rc = -EBUSY;
goto out;
}
mutex_lock(&wil->vif_mutex);
active_ifaces = wil_has_active_ifaces(wil, true, false);
mutex_unlock(&wil->vif_mutex);
if (!active_ifaces) {
/* can always sleep when down */
wil_dbg_pm(wil, "Interface is down\n");
goto out;
}
if (test_bit(wil_status_resetting, wil->status)) {
wil_dbg_pm(wil, "Delay suspend when resetting\n");
rc = -EBUSY;
goto out;
}
if (wil->recovery_state != fw_recovery_idle) {
wil_dbg_pm(wil, "Delay suspend during recovery\n");
rc = -EBUSY;
goto out;
}
/* interface is running */
mutex_lock(&wil->vif_mutex);
for (i = 0; i < GET_MAX_VIFS(wil); i++) {
struct wil6210_vif *vif = wil->vifs[i];
if (!vif)
continue;
if (!wil_can_suspend_vif(wil, vif, is_runtime)) {
rc = -EBUSY;
mutex_unlock(&wil->vif_mutex);
goto out;
}
}
mutex_unlock(&wil->vif_mutex);
out:
wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
if (rc)
wil->suspend_stats.rejected_by_host++;
return rc;
}