cnss2: Expose PCIe DRV connection status

Interface change to expose PCIe DRV connection status to WLAN
driver so that it is able to suspend/resume based on the status.

Change-Id: If8f706b0eb38f209a5e322b112beb9a95babdcad
Signed-off-by: Yue Ma <yuem@codeaurora.org>

diff --git a/drivers/net/wireless/cnss2/pci.c b/drivers/net/wireless/cnss2/pci.c
index d0830fe..3926023 100644 (file)
--- a/drivers/net/wireless/cnss2/pci.c
+++ b/drivers/net/wireless/cnss2/pci.c
@@ -727,6 +727,17 @@ int cnss_pci_dev_ramdump(struct cnss_pci_data *pci_priv)
        return ret;
 }
 
+int cnss_pci_is_drv_connected(struct device *dev)
+{
+       struct cnss_pci_data *pci_priv = cnss_get_pci_priv(to_pci_dev(dev));
+
+       if (!pci_priv)
+               return -ENODEV;
+
+       return pci_priv->drv_connected_last;
+}
+EXPORT_SYMBOL(cnss_pci_is_drv_connected);
+
 int cnss_wlan_register_driver(struct cnss_wlan_driver *driver_ops)
 {
        int ret = 0;

diff --git a/drivers/net/wireless/cnss2/pci.h b/drivers/net/wireless/cnss2/pci.h
index 33c6276..eef476a 100644 (file)
--- a/drivers/net/wireless/cnss2/pci.h
+++ b/drivers/net/wireless/cnss2/pci.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -70,6 +70,7 @@ struct cnss_pci_data {
        struct pci_saved_state *default_state;
        struct msm_pcie_register_event msm_pci_event;
        atomic_t auto_suspended;
+       u8 drv_connected_last;
        bool monitor_wake_intr;
        struct dma_iommu_mapping *smmu_mapping;
        dma_addr_t smmu_iova_start;

diff --git a/include/net/cnss2.h b/include/net/cnss2.h
index c3d1a30..686a13a 100644 (file)
--- a/include/net/cnss2.h
+++ b/include/net/cnss2.h
@@ -218,6 +218,7 @@ extern void cnss_lock_pm_sem(struct device *dev);
 extern void cnss_release_pm_sem(struct device *dev);
 extern int cnss_auto_suspend(struct device *dev);
 extern int cnss_auto_resume(struct device *dev);
+extern int cnss_pci_is_drv_connected(struct device *dev);
 extern int cnss_pci_force_wake_request(struct device *dev);
 extern int cnss_pci_is_device_awake(struct device *dev);
 extern int cnss_pci_force_wake_release(struct device *dev);