[PATCH v2 2/2] r8169: Enable ASPM for selected NICs

Kai-Heng Feng
2021-08-12T15:54:54Z

The latest vendor driver enables ASPM for more recent r8168 NICs, do the
same here to match the behavior.

In addition, pci_disable_link_state() is only used for RTL8168D/8111D in
vendor driver, also match that.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
v2:
- No change

drivers/net/ethernet/realtek/r8169_main.c | 34 +++++++++++++++++------
1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 7ab2e841dc69..caa29e72a21a 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -623,7 +623,7 @@ struct rtl8169_private {
} wk;

unsigned supports_gmii:1;
- unsigned aspm_manageable:1;
+ unsigned aspm_supported:1;
unsigned aspm_enabled:1;
struct delayed_work aspm_toggle;
struct mutex aspm_mutex;
@@ -2667,8 +2667,11 @@ static void rtl_pcie_state_l2l3_disable(struct rtl8169_private *tp)

static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
{
+ if (!tp->aspm_supported)
+ return;
+
/* Don't enable ASPM in the chip if OS can't control ASPM */
- if (enable && tp->aspm_manageable) {
+ if (enable) {
RTL_W8(tp, Config5, RTL_R8(tp, Config5) | ASPM_en);
RTL_W8(tp, Config2, RTL_R8(tp, Config2) | ClkReqEn);
} else {
@@ -5284,6 +5287,21 @@ static void rtl_init_mac_address(struct rtl8169_private *tp)
rtl_rar_set(tp, mac_addr);
}

+static int rtl_hw_aspm_supported(struct rtl8169_private *tp)
+{
+ switch (tp->mac_version) {
+ case RTL_GIGA_MAC_VER_32 ... RTL_GIGA_MAC_VER_36:
+ case RTL_GIGA_MAC_VER_38:
+ case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_42:
+ case RTL_GIGA_MAC_VER_44 ... RTL_GIGA_MAC_VER_46:
+ case RTL_GIGA_MAC_VER_49 ... RTL_GIGA_MAC_VER_63:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct rtl8169_private *tp;
@@ -5315,12 +5333,12 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
return rc;

- /* Disable ASPM completely as that cause random device stop working
- * problems as well as full system hangs for some PCIe devices users.
- */
- rc = pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
- PCIE_LINK_STATE_L1);
- tp->aspm_manageable = !rc;
+ if (tp->mac_version == RTL_GIGA_MAC_VER_25)
+ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
+ PCIE_LINK_STATE_L1 |
+ PCIE_LINK_STATE_CLKPM);
+
+ tp->aspm_supported = rtl_hw_aspm_supported(tp);

/* enable device (incl. PCI PM wakeup and hotplug setup) */
rc = pcim_enable_device(pdev);
--
2.32.0