This is a note to let you know that I've just added the patch titled
net: lan743x: disable WOL upon resume to restore full data path operation
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-lan743x-disable-wol-upon-resume-to-restore-full-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7fe418911185bf048fbe1328652d6132564e5476
Author: Raju Lakkaraju <Raju.Lakkaraju@xxxxxxxxxxxxx>
Date: Fri Jun 14 22:41:55 2024 +0530
net: lan743x: disable WOL upon resume to restore full data path operation
[ Upstream commit 7725363936a88351b71495774c1e0e852ae4cdca ]
When Wake-on-LAN (WoL) is active and the system is in suspend mode, triggering
a system event can wake the system from sleep, which may block the data path.
To restore normal data path functionality after waking, disable all wake-up
events. Furthermore, clear all Write 1 to Clear (W1C) status bits by writing
1's to them.
Fixes: 4d94282afd95 ("lan743x: Add power management support")
Reviewed-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@xxxxxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index d3aebe9fea1a3..5bc728f669bf5 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -2975,7 +2975,7 @@ static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
/* clear wake settings */
pmtctl = lan743x_csr_read(adapter, PMT_CTL);
- pmtctl |= PMT_CTL_WUPS_MASK_;
+ pmtctl |= PMT_CTL_WUPS_MASK_ | PMT_CTL_RES_CLR_WKP_MASK_;
pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
@@ -3110,6 +3110,7 @@ static int lan743x_pm_resume(struct device *dev)
struct pci_dev *pdev = to_pci_dev(dev);
struct net_device *netdev = pci_get_drvdata(pdev);
struct lan743x_adapter *adapter = netdev_priv(netdev);
+ u32 data;
int ret;
pci_set_power_state(pdev, PCI_D0);
@@ -3128,6 +3129,30 @@ static int lan743x_pm_resume(struct device *dev)
return ret;
}
+ ret = lan743x_csr_read(adapter, MAC_WK_SRC);
+ netif_dbg(adapter, drv, adapter->netdev,
+ "Wakeup source : 0x%08X\n", ret);
+
+ /* Clear the wol configuration and status bits. Note that
+ * the status bits are "Write One to Clear (W1C)"
+ */
+ data = MAC_WUCSR_EEE_TX_WAKE_ | MAC_WUCSR_EEE_RX_WAKE_ |
+ MAC_WUCSR_RFE_WAKE_FR_ | MAC_WUCSR_PFDA_FR_ | MAC_WUCSR_WUFR_ |
+ MAC_WUCSR_MPR_ | MAC_WUCSR_BCAST_FR_;
+ lan743x_csr_write(adapter, MAC_WUCSR, data);
+
+ data = MAC_WUCSR2_NS_RCD_ | MAC_WUCSR2_ARP_RCD_ |
+ MAC_WUCSR2_IPV6_TCPSYN_RCD_ | MAC_WUCSR2_IPV4_TCPSYN_RCD_;
+ lan743x_csr_write(adapter, MAC_WUCSR2, data);
+
+ data = MAC_WK_SRC_ETH_PHY_WK_ | MAC_WK_SRC_IPV6_TCPSYN_RCD_WK_ |
+ MAC_WK_SRC_IPV4_TCPSYN_RCD_WK_ | MAC_WK_SRC_EEE_TX_WK_ |
+ MAC_WK_SRC_EEE_RX_WK_ | MAC_WK_SRC_RFE_FR_WK_ |
+ MAC_WK_SRC_PFDA_FR_WK_ | MAC_WK_SRC_MP_FR_WK_ |
+ MAC_WK_SRC_BCAST_FR_WK_ | MAC_WK_SRC_WU_FR_WK_ |
+ MAC_WK_SRC_WK_FR_SAVED_;
+ lan743x_csr_write(adapter, MAC_WK_SRC, data);
+
/* open netdev when netdev is at running state while resume.
* For instance, it is true when system wakesup after pm-suspend
* However, it is false when system wakes up after suspend GUI menu
@@ -3136,9 +3161,6 @@ static int lan743x_pm_resume(struct device *dev)
lan743x_netdev_open(netdev);
netif_device_attach(netdev);
- ret = lan743x_csr_read(adapter, MAC_WK_SRC);
- netif_info(adapter, drv, adapter->netdev,
- "Wakeup source : 0x%08X\n", ret);
return 0;
}
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 345313d845b6e..e8ce2496e33a4 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -49,6 +49,7 @@
#define PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ BIT(18)
#define PMT_CTL_GPIO_WAKEUP_EN_ BIT(15)
#define PMT_CTL_EEE_WAKEUP_EN_ BIT(13)
+#define PMT_CTL_RES_CLR_WKP_MASK_ GENMASK(9, 8)
#define PMT_CTL_READY_ BIT(7)
#define PMT_CTL_ETH_PHY_RST_ BIT(4)
#define PMT_CTL_WOL_EN_ BIT(3)
@@ -160,12 +161,31 @@
#define MAC_WUCSR (0x140)
#define MAC_MP_SO_EN_ BIT(21)
#define MAC_WUCSR_RFE_WAKE_EN_ BIT(14)
+#define MAC_WUCSR_EEE_TX_WAKE_ BIT(13)
+#define MAC_WUCSR_EEE_RX_WAKE_ BIT(11)
+#define MAC_WUCSR_RFE_WAKE_FR_ BIT(9)
+#define MAC_WUCSR_PFDA_FR_ BIT(7)
+#define MAC_WUCSR_WUFR_ BIT(6)
+#define MAC_WUCSR_MPR_ BIT(5)
+#define MAC_WUCSR_BCAST_FR_ BIT(4)
#define MAC_WUCSR_PFDA_EN_ BIT(3)
#define MAC_WUCSR_WAKE_EN_ BIT(2)
#define MAC_WUCSR_MPEN_ BIT(1)
#define MAC_WUCSR_BCST_EN_ BIT(0)
#define MAC_WK_SRC (0x144)
+#define MAC_WK_SRC_ETH_PHY_WK_ BIT(17)
+#define MAC_WK_SRC_IPV6_TCPSYN_RCD_WK_ BIT(16)
+#define MAC_WK_SRC_IPV4_TCPSYN_RCD_WK_ BIT(15)
+#define MAC_WK_SRC_EEE_TX_WK_ BIT(14)
+#define MAC_WK_SRC_EEE_RX_WK_ BIT(13)
+#define MAC_WK_SRC_RFE_FR_WK_ BIT(12)
+#define MAC_WK_SRC_PFDA_FR_WK_ BIT(11)
+#define MAC_WK_SRC_MP_FR_WK_ BIT(10)
+#define MAC_WK_SRC_BCAST_FR_WK_ BIT(9)
+#define MAC_WK_SRC_WU_FR_WK_ BIT(8)
+#define MAC_WK_SRC_WK_FR_SAVED_ BIT(7)
+
#define MAC_MP_SO_HI (0x148)
#define MAC_MP_SO_LO (0x14C)
@@ -226,6 +246,10 @@
#define RFE_INDX(index) (0x580 + (index << 2))
#define MAC_WUCSR2 (0x600)
+#define MAC_WUCSR2_NS_RCD_ BIT(7)
+#define MAC_WUCSR2_ARP_RCD_ BIT(6)
+#define MAC_WUCSR2_IPV6_TCPSYN_RCD_ BIT(5)
+#define MAC_WUCSR2_IPV4_TCPSYN_RCD_ BIT(4)
#define INT_STS (0x780)
#define INT_BIT_DMA_RX_(channel) BIT(24 + (channel))
