net: hns3: Add support for dynamically buffer reallocation

Current buffer allocation can only happen at init, when
doing buffer reallocation after init, care must be taken
care of memory which priv_buf points to.
This patch fixes it by using a dynamic allocated temporary
memory. Because we only do buffer reallocation at init or
when setting up the DCB parameter, and priv_buf is only
used at buffer allocation process, so it is ok to use a
dynamic allocated temporary memory.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h

@@ -322,6 +322,11 @@ struct hclge_shared_buf {
 	u32 buf_size;
 };
 
+struct hclge_pkt_buf_alloc {
+	struct hclge_priv_buf priv_buf[HCLGE_MAX_TC_NUM];
+	struct hclge_shared_buf s_buf;
+};
+
 #define HCLGE_RX_COM_WL_EN_B	15
 struct hclge_rx_com_wl_buf {
 	__le16 high_wl;

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h

@@ -463,8 +463,6 @@ struct hclge_dev {
 
 	u32 pkt_buf_size; /* Total pf buf size for tx/rx */
 	u32 mps; /* Max packet size */
-	struct hclge_priv_buf *priv_buf;
-	struct hclge_shared_buf s_buf;
 
 	enum hclge_mta_dmac_sel_type mta_mac_sel_type;
 	bool enable_mta; /* Mutilcast filter enable */