ice: Add advanced power mgmt for WoL

Add callbacks needed to support advanced power management for Wake on LAN.
Also make ice_pf_state_is_nominal function available for all configurations
not just CONFIG_PCI_IOV.

Signed-off-by: Akeem G Abodunrin <[email protected]>
Signed-off-by: Jesse Brandeburg <[email protected]>
Tested-by: Andrew Bowers <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: aabodunrin

drivers/net/ethernet/intel/ice/ice.h

@@ -423,6 +423,8 @@ struct ice_pf {
 	u16 empr_count;		/* EMP reset count */
 	u16 pfr_count;		/* PF reset count */
 
+	u8 wol_ena : 1;		/* software state of WoL */
+	u32 wakeup_reason;	/* last wakeup reason */
 	struct ice_hw_port_stats stats;
 	struct ice_hw_port_stats stats_prev;
 	struct ice_hw hw;
@@ -568,6 +570,7 @@ int ice_schedule_reset(struct ice_pf *pf, enum ice_reset_req reset);
 void ice_print_link_msg(struct ice_vsi *vsi, bool isup);
 const char *ice_stat_str(enum ice_status stat_err);
 const char *ice_aq_str(enum ice_aq_err aq_err);
+bool ice_is_wol_supported(struct ice_pf *pf);
 int
 ice_fdir_write_fltr(struct ice_pf *pf, struct ice_fdir_fltr *input, bool add,
 		    bool is_tun);

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -3322,6 +3322,58 @@ static int ice_set_channels(struct net_device *dev, struct ethtool_channels *ch)
 	return 0;
 }
 
+/**
+ * ice_get_wol - get current Wake on LAN configuration
+ * @netdev: network interface device structure
+ * @wol: Ethtool structure to retrieve WoL settings
+ */
+static void ice_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+	struct ice_netdev_priv *np = netdev_priv(netdev);
+	struct ice_pf *pf = np->vsi->back;
+
+	if (np->vsi->type != ICE_VSI_PF)
+		netdev_warn(netdev, "Wake on LAN is not supported on this interface!\n");
+
+	/* Get WoL settings based on the HW capability */
+	if (ice_is_wol_supported(pf)) {
+		wol->supported = WAKE_MAGIC;
+		wol->wolopts = pf->wol_ena ? WAKE_MAGIC : 0;
+	} else {
+		wol->supported = 0;
+		wol->wolopts = 0;
+	}
+}
+
+/**
+ * ice_set_wol - set Wake on LAN on supported device
+ * @netdev: network interface device structure
+ * @wol: Ethtool structure to set WoL
+ */
+static int ice_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+	struct ice_netdev_priv *np = netdev_priv(netdev);
+	struct ice_vsi *vsi = np->vsi;
+	struct ice_pf *pf = vsi->back;
+
+	if (vsi->type != ICE_VSI_PF || !ice_is_wol_supported(pf))
+		return -EOPNOTSUPP;
+
+	/* only magic packet is supported */
+	if (wol->wolopts && wol->wolopts != WAKE_MAGIC)
+		return -EOPNOTSUPP;
+
+	/* Set WoL only if there is a new value */
+	if (pf->wol_ena != !!wol->wolopts) {
+		pf->wol_ena = !!wol->wolopts;
+		device_set_wakeup_enable(ice_pf_to_dev(pf), pf->wol_ena);
+		netdev_dbg(netdev, "WoL magic packet %sabled\n",
+			   pf->wol_ena ? "en" : "dis");
+	}
+
+	return 0;
+}
+
 enum ice_container_type {
 	ICE_RX_CONTAINER,
 	ICE_TX_CONTAINER,
@@ -3805,6 +3857,8 @@ static const struct ethtool_ops ice_ethtool_ops = {
 	.get_drvinfo		= ice_get_drvinfo,
 	.get_regs_len		= ice_get_regs_len,
 	.get_regs		= ice_get_regs,
+	.get_wol		= ice_get_wol,
+	.set_wol		= ice_set_wol,
 	.get_msglevel		= ice_get_msglevel,
 	.set_msglevel		= ice_set_msglevel,
 	.self_test		= ice_self_test,
@@ -3847,6 +3901,8 @@ static const struct ethtool_ops ice_ethtool_safe_mode_ops = {
 	.get_drvinfo		= ice_get_drvinfo,
 	.get_regs_len		= ice_get_regs_len,
 	.get_regs		= ice_get_regs,
+	.get_wol		= ice_get_wol,
+	.set_wol		= ice_set_wol,
 	.get_msglevel		= ice_get_msglevel,
 	.set_msglevel		= ice_set_msglevel,
 	.get_link		= ethtool_op_get_link,

drivers/net/ethernet/intel/ice/ice_hw_autogen.h

@@ -367,6 +367,15 @@
 #define VSIQF_FD_CNT_FD_GCNT_M			ICE_M(0x3FFF, 0)
 #define VSIQF_HKEY_MAX_INDEX			12
 #define VSIQF_HLUT_MAX_INDEX			15
+#define PFPM_APM				0x000B8080
+#define PFPM_APM_APME_M				BIT(0)
+#define PFPM_WUFC				0x0009DC00
+#define PFPM_WUFC_MAG_M				BIT(1)
+#define PFPM_WUS				0x0009DB80
+#define PFPM_WUS_LNKC_M				BIT(0)
+#define PFPM_WUS_MAG_M				BIT(1)
+#define PFPM_WUS_MNG_M				BIT(3)
+#define PFPM_WUS_FW_RST_WK_M			BIT(31)
 #define VFINT_DYN_CTLN(_i)			(0x00003800 + ((_i) * 4))
 #define VFINT_DYN_CTLN_CLEARPBA_M		BIT(1)
 #define PRTRPB_RDPC				0x000AC260

drivers/net/ethernet/intel/ice/ice_lib.c

@@ -1467,6 +1467,30 @@ static void ice_vsi_set_rss_flow_fld(struct ice_vsi *vsi)
 			vsi_num, ice_stat_str(status));
 }
 
+/**
+ * ice_pf_state_is_nominal - checks the PF for nominal state
+ * @pf: pointer to PF to check
+ *
+ * Check the PF's state for a collection of bits that would indicate
+ * the PF is in a state that would inhibit normal operation for
+ * driver functionality.
+ *
+ * Returns true if PF is in a nominal state, false otherwise
+ */
+bool ice_pf_state_is_nominal(struct ice_pf *pf)
+{
+	DECLARE_BITMAP(check_bits, __ICE_STATE_NBITS) = { 0 };
+
+	if (!pf)
+		return false;
+
+	bitmap_set(check_bits, 0, __ICE_STATE_NOMINAL_CHECK_BITS);
+	if (bitmap_intersects(pf->state, check_bits, __ICE_STATE_NBITS))
+		return false;
+
+	return true;
+}
+
 /**
  * ice_update_eth_stats - Update VSI-specific ethernet statistics counters
  * @vsi: the VSI to be updated

drivers/net/ethernet/intel/ice/ice_lib.h

@@ -8,6 +8,8 @@
 
 const char *ice_vsi_type_str(enum ice_vsi_type vsi_type);
 
+bool ice_pf_state_is_nominal(struct ice_pf *pf);
+
 void ice_update_eth_stats(struct ice_vsi *vsi);
 
 int ice_vsi_cfg_rxqs(struct ice_vsi *vsi);