netdev - [PATCH RFC] net: hns3: add a module parameter wq

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Date:   Tue, 20 Jul 2021 16:34:57 +0800
From:   Yufeng Mo <moyufeng@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <shenjian15@...wei.com>,
        <lipeng321@...wei.com>, <yisen.zhuang@...wei.com>,
        <linyunsheng@...wei.com>, <zhangjiaran@...wei.com>,
        <huangguangbin2@...wei.com>, <chenhao288@...ilicon.com>,
        <salil.mehta@...wei.com>, <moyufeng@...wei.com>,
        <linuxarm@...wei.com>, <linuxarm@...neuler.org>
Subject: [PATCH RFC] net: hns3: add a module parameter wq_unbound

To meet the requirements of different scenarios, the WQ_UNBOUND
flag of the workqueue is transferred as a module parameter. Users
can flexibly configure the usage mode as required.

Signed-off-by: Yufeng Mo <moyufeng@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c   | 10 +++++++++-
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index dd3354a..9816592 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -76,6 +76,10 @@ static struct hnae3_ae_algo ae_algo;
 
 static struct workqueue_struct *hclge_wq;
 
+static unsigned int wq_unbound;
+module_param(wq_unbound, uint, 0400);
+MODULE_PARM_DESC(wq_unbound, "Specifies WQ_UNBOUND flag for the workqueue, non-zero value takes effect");
+
 static const struct pci_device_id ae_algo_pci_tbl[] = {
 	{PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
 	{PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
@@ -12936,7 +12940,11 @@ static int hclge_init(void)
 {
 	pr_info("%s is initializing\n", HCLGE_NAME);
 
-	hclge_wq = alloc_workqueue("%s", 0, 0, HCLGE_NAME);
+	if (wq_unbound)
+		hclge_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, HCLGE_NAME);
+	else
+		hclge_wq = alloc_workqueue("%s", 0, 0, HCLGE_NAME);
+
 	if (!hclge_wq) {
 		pr_err("%s: failed to create workqueue\n", HCLGE_NAME);
 		return -ENOMEM;
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 52eaf82..85f6772 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -21,6 +21,10 @@ static struct hnae3_ae_algo ae_algovf;
 
 static struct workqueue_struct *hclgevf_wq;
 
+static unsigned int wq_unbound;
+module_param(wq_unbound, uint, 0400);
+MODULE_PARM_DESC(wq_unbound, "Specifies WQ_UNBOUND flag for the workqueue, non-zero value takes effect");
+
 static const struct pci_device_id ae_algovf_pci_tbl[] = {
 	{PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_VF), 0},
 	{PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_RDMA_DCB_PFC_VF),
@@ -3855,7 +3859,11 @@ static int hclgevf_init(void)
 {
 	pr_info("%s is initializing\n", HCLGEVF_NAME);
 
-	hclgevf_wq = alloc_workqueue("%s", 0, 0, HCLGEVF_NAME);
+	if (wq_unbound)
+		hclgevf_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, HCLGEVF_NAME);
+	else
+		hclgevf_wq = alloc_workqueue("%s", 0, 0, HCLGEVF_NAME);
+
 	if (!hclgevf_wq) {
 		pr_err("%s: failed to create workqueue\n", HCLGEVF_NAME);
 		return -ENOMEM;
-- 
2.8.1