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cnss2: Expose APIs to prevent and allow PCIe L1 state

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WLAN driver can use the APIs to control if PCIe can enter L1 and
L1ss states.

Change-Id: Iad784b1ca66199ad61c471635a67542afd34480e
Signed-off-by: Yue Ma <yuem@codeaurora.org>
This commit is contained in:
Yue Ma 2020-02-07 12:02:12 -08:00
commit 40eb3e3bbb
2 changed files with 19 additions and 1 deletions
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16
drivers/net/wireless/cnss2/pci.c
View file

@ -804,6 +804,22 @@ out:
return ret;
}
int cnss_pci_prevent_l1(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
return msm_pcie_prevent_l1(pci_dev);
}
EXPORT_SYMBOL(cnss_pci_prevent_l1);
void cnss_pci_allow_l1(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
msm_pcie_allow_l1(pci_dev);
}
EXPORT_SYMBOL(cnss_pci_allow_l1);
int cnss_pci_link_down(struct device *dev)
{
unsigned long flags;

4
include/net/cnss2.h
View file

@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved. */
/* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved. */
#ifndef _NET_CNSS2_H
#define _NET_CNSS2_H
@ -158,6 +158,8 @@ enum cnss_recovery_reason {
extern int cnss_wlan_register_driver(struct cnss_wlan_driver *driver);
extern void cnss_wlan_unregister_driver(struct cnss_wlan_driver *driver);
extern void cnss_device_crashed(struct device *dev);
extern int cnss_pci_prevent_l1(struct device *dev);
extern void cnss_pci_allow_l1(struct device *dev);
extern int cnss_pci_link_down(struct device *dev);
extern int cnss_pci_is_device_down(struct device *dev);
extern void cnss_schedule_recovery(struct device *dev,