[PATCH net-next 2/9] net: hns3: Add support of the HNAE3 framework

[Salil Mehta]

This patch adds the support of the HNAE3 (Hisilicon Network
Acceleration Engine 3) framework support to the HNS3 driver.

Framework facilitates clients like ENET(HNS3 Ethernet Driver), RoCE
and user-space Ethernet drivers (like ODP etc.) to register with HNAE3
devices and their associated operations.

Signed-off-by: Daode Huang 
Signed-off-by: lipeng 
Signed-off-by: Salil Mehta 
Signed-off-by: Yisen Zhuang 
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.c | 305 +++
 drivers/net/ethernet/hisilicon/hns3/hnae3.h | 449 
 2 files changed, 754 insertions(+)
 create mode 100644 drivers/net/ethernet/hisilicon/hns3/hnae3.c
 create mode 100644 drivers/net/ethernet/hisilicon/hns3/hnae3.h

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.c 
b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
new file mode 100644
index 000..f133e1d
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) 2016-2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include 
+#include 
+#include 
+
+#include "hnae3.h"
+
+static LIST_HEAD(hnae3_ae_algo_list);
+static LIST_HEAD(hnae3_client_list);
+static LIST_HEAD(hnae3_ae_dev_list);
+
+static DEFINE_SPINLOCK(hnae3_list_ae_algo_lock);
+static DEFINE_SPINLOCK(hnae3_list_client_lock);
+static DEFINE_SPINLOCK(hnae3_list_ae_dev_lock);
+
+static void hnae3_list_add(spinlock_t *lock, struct list_head *node,
+  struct list_head *head)
+{
+   unsigned long flags;
+
+   spin_lock_irqsave(lock, flags);
+   list_add_tail_rcu(node, head);
+   spin_unlock_irqrestore(lock, flags);
+}
+
+static void hnae3_list_del(spinlock_t *lock, struct list_head *node)
+{
+   unsigned long flags;
+
+   spin_lock_irqsave(lock, flags);
+   list_del_rcu(node);
+   spin_unlock_irqrestore(lock, flags);
+}
+
+static bool hnae3_client_match(enum hnae3_client_type client_type,
+  enum hnae3_dev_type dev_type)
+{
+   if (dev_type == HNAE3_DEV_KNIC) {
+   switch (client_type) {
+   case HNAE3_CLIENT_KNIC:
+   case HNAE3_CLIENT_ROCE:
+   return true;
+   default:
+   return false;
+   }
+   } else if (dev_type == HNAE3_DEV_UNIC) {
+   switch (client_type) {
+   case HNAE3_CLIENT_UNIC:
+   return true;
+   default:
+   return false;
+   }
+   } else {
+   return false;
+   }
+}
+
+int hnae3_register_client(struct hnae3_client *client)
+{
+   struct hnae3_client *client_tmp;
+   struct hnae3_ae_dev *ae_dev;
+   int ret;
+
+   /* One system should only have one client for every type */
+   list_for_each_entry(client_tmp, _client_list, node) {
+   if (client_tmp->type == client->type)
+   return 0;
+   }
+
+   hnae3_list_add(_list_client_lock, >node,
+  _client_list);
+
+   /* Check if there are matched ae_dev */
+   list_for_each_entry(ae_dev, _ae_dev_list, node) {
+   if (hnae3_client_match(client->type, ae_dev->dev_type) &&
+   hnae_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B)) {
+   if (ae_dev->ops && ae_dev->ops->register_client) {
+   ret = ae_dev->ops->register_client(client,
+  ae_dev);
+   if (ret) {
+   dev_err(_dev->pdev->dev,
+   "init ae_dev error.\n");
+   return ret;
+   }
+   }
+   }
+   }
+
+   return 0;
+}
+EXPORT_SYMBOL(hnae3_register_client);
+
+void hnae3_unregister_client(struct hnae3_client *client)
+{
+   struct hnae3_ae_dev *ae_dev;
+
+   /* Check if there are matched ae_dev */
+   list_for_each_entry(ae_dev, _ae_dev_list, node) {
+   if (hnae3_client_match(client->type, ae_dev->dev_type) &&
+   hnae_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))
+   if (ae_dev->ops && ae_dev->ops->unregister_client)
+   ae_dev->ops->unregister_client(client, ae_dev);
+   }
+   hnae3_list_del(_list_client_lock, >node);
+}
+EXPORT_SYMBOL(hnae3_unregister_client);
+
+/* hnae_ae_register - register a AE engine to hnae framework
+ * @hdev: the hnae ae engine device
+ * @owner:  the module who 

[PATCH net-next 2/9] net: hns3: Add support of the HNAE3 framework

[Salil Mehta]

This patch adds the support of the HNAE3 (Hisilicon Network
Acceleration Engine 3) framework support to the HNS3 driver.

Framework facilitates clients like ENET(HNS3 Ethernet Driver), RoCE
and user-space Ethernet drivers (like ODP etc.) to register with HNAE3
devices and their associated operations.

Signed-off-by: Daode Huang 
Signed-off-by: lipeng 
Signed-off-by: Salil Mehta 
Signed-off-by: Yisen Zhuang 
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.c | 305 +++
 drivers/net/ethernet/hisilicon/hns3/hnae3.h | 449 
 2 files changed, 754 insertions(+)
 create mode 100644 drivers/net/ethernet/hisilicon/hns3/hnae3.c
 create mode 100644 drivers/net/ethernet/hisilicon/hns3/hnae3.h

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.c 
b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
new file mode 100644
index 000..f133e1d
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) 2016-2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include 
+#include 
+#include 
+
+#include "hnae3.h"
+
+static LIST_HEAD(hnae3_ae_algo_list);
+static LIST_HEAD(hnae3_client_list);
+static LIST_HEAD(hnae3_ae_dev_list);
+
+static DEFINE_SPINLOCK(hnae3_list_ae_algo_lock);
+static DEFINE_SPINLOCK(hnae3_list_client_lock);
+static DEFINE_SPINLOCK(hnae3_list_ae_dev_lock);
+
+static void hnae3_list_add(spinlock_t *lock, struct list_head *node,
+  struct list_head *head)
+{
+   unsigned long flags;
+
+   spin_lock_irqsave(lock, flags);
+   list_add_tail_rcu(node, head);
+   spin_unlock_irqrestore(lock, flags);
+}
+
+static void hnae3_list_del(spinlock_t *lock, struct list_head *node)
+{
+   unsigned long flags;
+
+   spin_lock_irqsave(lock, flags);
+   list_del_rcu(node);
+   spin_unlock_irqrestore(lock, flags);
+}
+
+static bool hnae3_client_match(enum hnae3_client_type client_type,
+  enum hnae3_dev_type dev_type)
+{
+   if (dev_type == HNAE3_DEV_KNIC) {
+   switch (client_type) {
+   case HNAE3_CLIENT_KNIC:
+   case HNAE3_CLIENT_ROCE:
+   return true;
+   default:
+   return false;
+   }
+   } else if (dev_type == HNAE3_DEV_UNIC) {
+   switch (client_type) {
+   case HNAE3_CLIENT_UNIC:
+   return true;
+   default:
+   return false;
+   }
+   } else {
+   return false;
+   }
+}
+
+int hnae3_register_client(struct hnae3_client *client)
+{
+   struct hnae3_client *client_tmp;
+   struct hnae3_ae_dev *ae_dev;
+   int ret;
+
+   /* One system should only have one client for every type */
+   list_for_each_entry(client_tmp, _client_list, node) {
+   if (client_tmp->type == client->type)
+   return 0;
+   }
+
+   hnae3_list_add(_list_client_lock, >node,
+  _client_list);
+
+   /* Check if there are matched ae_dev */
+   list_for_each_entry(ae_dev, _ae_dev_list, node) {
+   if (hnae3_client_match(client->type, ae_dev->dev_type) &&
+   hnae_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B)) {
+   if (ae_dev->ops && ae_dev->ops->register_client) {
+   ret = ae_dev->ops->register_client(client,
+  ae_dev);
+   if (ret) {
+   dev_err(_dev->pdev->dev,
+   "init ae_dev error.\n");
+   return ret;
+   }
+   }
+   }
+   }
+
+   return 0;
+}
+EXPORT_SYMBOL(hnae3_register_client);
+
+void hnae3_unregister_client(struct hnae3_client *client)
+{
+   struct hnae3_ae_dev *ae_dev;
+
+   /* Check if there are matched ae_dev */
+   list_for_each_entry(ae_dev, _ae_dev_list, node) {
+   if (hnae3_client_match(client->type, ae_dev->dev_type) &&
+   hnae_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))
+   if (ae_dev->ops && ae_dev->ops->unregister_client)
+   ae_dev->ops->unregister_client(client, ae_dev);
+   }
+   hnae3_list_del(_list_client_lock, >node);
+}
+EXPORT_SYMBOL(hnae3_unregister_client);
+
+/* hnae_ae_register - register a AE engine to hnae framework
+ * @hdev: the hnae ae engine device
+ * @owner:  the module who provides this dev
+ * NOTE: the duplicated name will not be checked
+ */
+int