net: atlantic: implement wake_phy feature

Wake on PHY allows to configure device to wakeup host
as soon as PHY link status is changed to active.
Signed-off-by: Nikita Danilov <ndanilov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/aq_cfg.h

@@ -78,6 +78,9 @@
 
 #define AQ_CFG_FC_MODE AQ_NIC_FC_FULL
 
+/* Default WOL modes used on initialization */
+#define AQ_CFG_WOL_MODES WAKE_MAGIC
+
 #define AQ_CFG_SPEED_MSK  0xFFFFU	/* 0xFFFFU==auto_neg */
 
 #define AQ_CFG_IS_AUTONEG_DEF       1U

drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c

@@ -356,11 +356,8 @@ static void aq_ethtool_get_wol(struct net_device *ndev,
 	struct aq_nic_s *aq_nic = netdev_priv(ndev);
 	struct aq_nic_cfg_s *cfg = aq_nic_get_cfg(aq_nic);
 
-	wol->supported = WAKE_MAGIC;
-	wol->wolopts = 0;
-
-	if (cfg->wol)
-		wol->wolopts |= WAKE_MAGIC;
+	wol->supported = AQ_NIC_WOL_MODES;
+	wol->wolopts = cfg->wol;
 }
 
 static int aq_ethtool_set_wol(struct net_device *ndev,
@@ -371,11 +368,12 @@ static int aq_ethtool_set_wol(struct net_device *ndev,
 	struct aq_nic_cfg_s *cfg = aq_nic_get_cfg(aq_nic);
 	int err = 0;
 
-	if (wol->wolopts & WAKE_MAGIC)
-		cfg->wol |= AQ_NIC_WOL_ENABLED;
-	else
-		cfg->wol &= ~AQ_NIC_WOL_ENABLED;
-	err = device_set_wakeup_enable(&pdev->dev, wol->wolopts);
+	if (wol->wolopts & ~AQ_NIC_WOL_MODES)
+		return -EOPNOTSUPP;
+
+	cfg->wol = wol->wolopts;
+
+	err = device_set_wakeup_enable(&pdev->dev, !!cfg->wol);
 
 	return err;
 }

drivers/net/ethernet/aquantia/atlantic/aq_main.c

@@ -74,7 +74,7 @@ static int aq_ndev_open(struct net_device *ndev)
 
 err_exit:
 	if (err < 0)
-		aq_nic_deinit(aq_nic);
+		aq_nic_deinit(aq_nic, true);
 	return err;
 }
 
@@ -86,7 +86,7 @@ static int aq_ndev_close(struct net_device *ndev)
 	err = aq_nic_stop(aq_nic);
 	if (err < 0)
 		goto err_exit;
-	aq_nic_deinit(aq_nic);
+	aq_nic_deinit(aq_nic, true);
 
 err_exit:
 	return err;

drivers/net/ethernet/aquantia/atlantic/aq_nic.c

@@ -79,6 +79,7 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
 	cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
 	cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
 	cfg->flow_control = AQ_CFG_FC_MODE;
+	cfg->wol = AQ_CFG_WOL_MODES;
 
 	cfg->mtu = AQ_CFG_MTU_DEF;
 	cfg->link_speed_msk = AQ_CFG_SPEED_MSK;
@@ -1000,7 +1001,20 @@ int aq_nic_stop(struct aq_nic_s *self)
 	return self->aq_hw_ops->hw_stop(self->aq_hw);
 }
 
-void aq_nic_deinit(struct aq_nic_s *self)
+void aq_nic_set_power(struct aq_nic_s *self)
+{
+	if (self->power_state != AQ_HW_POWER_STATE_D0 ||
+	    self->aq_hw->aq_nic_cfg->wol)
+		if (likely(self->aq_fw_ops->set_power)) {
+			mutex_lock(&self->fwreq_mutex);
+			self->aq_fw_ops->set_power(self->aq_hw,
+						   self->power_state,
+						   self->ndev->dev_addr);
+			mutex_unlock(&self->fwreq_mutex);
+		}
+}
+
+void aq_nic_deinit(struct aq_nic_s *self, bool link_down)
 {
 	struct aq_vec_s *aq_vec = NULL;
 	unsigned int i = 0U;
@@ -1017,23 +1031,12 @@ void aq_nic_deinit(struct aq_nic_s *self)
 	aq_ptp_ring_free(self);
 	aq_ptp_free(self);
 
-	if (likely(self->aq_fw_ops->deinit)) {
+	if (likely(self->aq_fw_ops->deinit) && link_down) {
 		mutex_lock(&self->fwreq_mutex);
 		self->aq_fw_ops->deinit(self->aq_hw);
 		mutex_unlock(&self->fwreq_mutex);
 	}
 
-	if (self->power_state != AQ_HW_POWER_STATE_D0 ||
-	    self->aq_hw->aq_nic_cfg->wol)
-		if (likely(self->aq_fw_ops->set_power)) {
-			mutex_lock(&self->fwreq_mutex);
-			self->aq_fw_ops->set_power(self->aq_hw,
-						   self->power_state,
-						   self->ndev->dev_addr);
-			mutex_unlock(&self->fwreq_mutex);
-		}
-
-
 err_exit:;
 }
 
@@ -1072,7 +1075,7 @@ int aq_nic_change_pm_state(struct aq_nic_s *self, pm_message_t *pm_msg)
 		if (err < 0)
 			goto err_exit;
 
-		aq_nic_deinit(self);
+		aq_nic_deinit(self, !self->aq_hw->aq_nic_cfg->wol);
 	} else {
 		err = aq_nic_init(self);
 		if (err < 0)
@@ -1108,7 +1111,8 @@ void aq_nic_shutdown(struct aq_nic_s *self)
 		if (err < 0)
 			goto err_exit;
 	}
-	aq_nic_deinit(self);
+	aq_nic_deinit(self, !self->aq_hw->aq_nic_cfg->wol);
+	aq_nic_set_power(self);
 
 err_exit:
 	rtnl_unlock();

drivers/net/ethernet/aquantia/atlantic/aq_nic.h

@@ -60,7 +60,8 @@ struct aq_nic_cfg_s {
 #define AQ_NIC_FLAG_ERR_UNPLUG  0x40000000U
 #define AQ_NIC_FLAG_ERR_HW      0x80000000U
 
-#define AQ_NIC_WOL_ENABLED	BIT(0)
+#define AQ_NIC_WOL_MODES        (WAKE_MAGIC |\
+				 WAKE_PHY)
 
 #define AQ_NIC_TCVEC2RING(_NIC_, _TC_, _VEC_) \
 	((_TC_) * AQ_CFG_TCS_MAX + (_VEC_))
@@ -141,7 +142,8 @@ int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p);
 int aq_nic_get_regs_count(struct aq_nic_s *self);
 void aq_nic_get_stats(struct aq_nic_s *self, u64 *data);
 int aq_nic_stop(struct aq_nic_s *self);
-void aq_nic_deinit(struct aq_nic_s *self);
+void aq_nic_deinit(struct aq_nic_s *self, bool link_down);
+void aq_nic_set_power(struct aq_nic_s *self);
 void aq_nic_free_hot_resources(struct aq_nic_s *self);
 void aq_nic_free_vectors(struct aq_nic_s *self);
 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu);

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c

@@ -845,7 +845,8 @@ int hw_atl_utils_get_fw_version(struct aq_hw_s *self, u32 *fw_version)
 	return 0;
 }
 
-static int aq_fw1x_set_wol(struct aq_hw_s *self, bool wol_enabled, u8 *mac)
+static int aq_fw1x_set_wake_magic(struct aq_hw_s *self, bool wol_enabled,
+				  u8 *mac)
 {
 	struct hw_atl_utils_fw_rpc *prpc = NULL;
 	unsigned int rpc_size = 0U;
@@ -894,8 +895,8 @@ static int aq_fw1x_set_power(struct aq_hw_s *self, unsigned int power_state,
 	unsigned int rpc_size = 0U;
 	int err = 0;
 
-	if (self->aq_nic_cfg->wol & AQ_NIC_WOL_ENABLED) {
-		err = aq_fw1x_set_wol(self, 1, mac);
+	if (self->aq_nic_cfg->wol & WAKE_MAGIC) {
+		err = aq_fw1x_set_wake_magic(self, 1, mac);
 
 		if (err < 0)
 			goto err_exit;

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c

@@ -34,6 +34,7 @@
 #define HW_ATL_FW2X_CAP_SLEEP_PROXY      BIT(CAPS_HI_SLEEP_PROXY)
 #define HW_ATL_FW2X_CAP_WOL              BIT(CAPS_HI_WOL)
 
+#define HW_ATL_FW2X_CTRL_WAKE_ON_LINK     BIT(CTRL_WAKE_ON_LINK)
 #define HW_ATL_FW2X_CTRL_SLEEP_PROXY      BIT(CTRL_SLEEP_PROXY)
 #define HW_ATL_FW2X_CTRL_WOL              BIT(CTRL_WOL)
 #define HW_ATL_FW2X_CTRL_LINK_DROP        BIT(CTRL_LINK_DROP)
@@ -345,87 +346,46 @@ static int aq_fw2x_get_phy_temp(struct aq_hw_s *self, int *temp)
 	return 0;
 }
 
-static int aq_fw2x_set_sleep_proxy(struct aq_hw_s *self, u8 *mac)
+static int aq_fw2x_set_wol(struct aq_hw_s *self, u8 *mac)
 {
 	struct hw_atl_utils_fw_rpc *rpc = NULL;
-	struct offload_info *cfg = NULL;
-	unsigned int rpc_size = 0U;
-	u32 mpi_opts;
+	struct offload_info *info = NULL;
+	u32 wol_bits = 0;
+	u32 rpc_size;
 	int err = 0;
 	u32 val;
 
-	rpc_size = sizeof(rpc->msg_id) + sizeof(*cfg);
+	if (self->aq_nic_cfg->wol & WAKE_PHY) {
+		aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR,
+				HW_ATL_FW2X_CTRL_LINK_DROP);
+		readx_poll_timeout_atomic(aq_fw2x_state2_get, self, val,
+					  (val &
+					   HW_ATL_FW2X_CTRL_LINK_DROP) != 0,
+					  1000, 100000);
+		wol_bits |= HW_ATL_FW2X_CTRL_WAKE_ON_LINK;
+	}
+
+	if (self->aq_nic_cfg->wol & WAKE_MAGIC) {
+		wol_bits |= HW_ATL_FW2X_CTRL_SLEEP_PROXY |
+			    HW_ATL_FW2X_CTRL_WOL;
 
 		err = hw_atl_utils_fw_rpc_wait(self, &rpc);
 		if (err < 0)
 			goto err_exit;
 
+		rpc_size = sizeof(*info) +
+			   offsetof(struct hw_atl_utils_fw_rpc, fw2x_offloads);
 		memset(rpc, 0, rpc_size);
-	cfg = (struct offload_info *)(&rpc->msg_id + 1);
-
-	memcpy(cfg->mac_addr, mac, ETH_ALEN);
-	cfg->len = sizeof(*cfg);
-
-	/* Clear bit 0x36C.23 and 0x36C.22 */
-	mpi_opts = aq_hw_read_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR);
-	mpi_opts &= ~HW_ATL_FW2X_CTRL_SLEEP_PROXY;
-	mpi_opts &= ~HW_ATL_FW2X_CTRL_LINK_DROP;
-
-	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR, mpi_opts);
+		info = &rpc->fw2x_offloads;
+		memcpy(info->mac_addr, mac, ETH_ALEN);
+		info->len = sizeof(*info);
 
 		err = hw_atl_utils_fw_rpc_call(self, rpc_size);
 		if (err < 0)
 			goto err_exit;
+	}
 
-	/* Set bit 0x36C.23 */
-	mpi_opts |= HW_ATL_FW2X_CTRL_SLEEP_PROXY;
-	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR, mpi_opts);
-
-	err = readx_poll_timeout_atomic(aq_fw2x_state2_get,
-					self, val,
-					val & HW_ATL_FW2X_CTRL_SLEEP_PROXY,
-					1U, 100000U);
-
-err_exit:
-	return err;
-}
-
-static int aq_fw2x_set_wol_params(struct aq_hw_s *self, u8 *mac)
-{
-	struct hw_atl_utils_fw_rpc *rpc = NULL;
-	struct fw2x_msg_wol *msg = NULL;
-	u32 mpi_opts;
-	int err = 0;
-	u32 val;
-
-	err = hw_atl_utils_fw_rpc_wait(self, &rpc);
-	if (err < 0)
-		goto err_exit;
-
-	msg = (struct fw2x_msg_wol *)rpc;
-
-	memset(msg, 0, sizeof(*msg));
-
-	msg->msg_id = HAL_ATLANTIC_UTILS_FW2X_MSG_WOL;
-	msg->magic_packet_enabled = true;
-	memcpy(msg->hw_addr, mac, ETH_ALEN);
-
-	mpi_opts = aq_hw_read_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR);
-	mpi_opts &= ~(HW_ATL_FW2X_CTRL_SLEEP_PROXY | HW_ATL_FW2X_CTRL_WOL);
-
-	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR, mpi_opts);
-
-	err = hw_atl_utils_fw_rpc_call(self, sizeof(*msg));
-	if (err < 0)
-		goto err_exit;
-
-	/* Set bit 0x36C.24 */
-	mpi_opts |= HW_ATL_FW2X_CTRL_WOL;
-	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR, mpi_opts);
-
-	err = readx_poll_timeout_atomic(aq_fw2x_state2_get,
-					self, val, val & HW_ATL_FW2X_CTRL_WOL,
-					1U, 10000U);
+	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR, wol_bits);
 
 err_exit:
 	return err;
@@ -436,14 +396,9 @@ static int aq_fw2x_set_power(struct aq_hw_s *self, unsigned int power_state,
 {
 	int err = 0;
 
-	if (self->aq_nic_cfg->wol & AQ_NIC_WOL_ENABLED) {
-		err = aq_fw2x_set_sleep_proxy(self, mac);
-		if (err < 0)
-			goto err_exit;
-		err = aq_fw2x_set_wol_params(self, mac);
-	}
+	if (self->aq_nic_cfg->wol)
+		err = aq_fw2x_set_wol(self, mac);
 
-err_exit:
 	return err;
 }