[PATCH net-next 1/3] net: hisilicon: hns: Remove unused hns_dsaf_roce_reset

[linux@treblig.org]

From: "Dr. David Alan Gilbert" <linux@treblig.org>

hns_dsaf_roce_reset() has been unused since 2021's
commit 38d220882426 ("RDMA/hns: Remove support for HIP06")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 .../ethernet/hisilicon/hns/hns_dsaf_main.c    | 109 ------------------
 .../ethernet/hisilicon/hns/hns_dsaf_main.h    |   2 -
 2 files changed, 111 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
index 851490346261..6b6ced37e490 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -3019,115 +3019,6 @@ static struct platform_driver g_dsaf_driver = {
 
 module_platform_driver(g_dsaf_driver);
 
-/**
- * hns_dsaf_roce_reset - reset dsaf and roce
- * @dsaf_fwnode: Pointer to framework node for the dasf
- * @dereset: false - request reset , true - drop reset
- * return 0 - success , negative -fail
- */
-int hns_dsaf_roce_reset(struct fwnode_handle *dsaf_fwnode, bool dereset)
-{
-	struct dsaf_device *dsaf_dev;
-	struct platform_device *pdev;
-	u32 mp;
-	u32 sl;
-	u32 credit;
-	int i;
-	static const u32 port_map[DSAF_ROCE_CREDIT_CHN][DSAF_ROCE_CHAN_MODE_NUM] = {
-		{DSAF_ROCE_PORT_0, DSAF_ROCE_PORT_0, DSAF_ROCE_PORT_0},
-		{DSAF_ROCE_PORT_1, DSAF_ROCE_PORT_0, DSAF_ROCE_PORT_0},
-		{DSAF_ROCE_PORT_2, DSAF_ROCE_PORT_1, DSAF_ROCE_PORT_0},
-		{DSAF_ROCE_PORT_3, DSAF_ROCE_PORT_1, DSAF_ROCE_PORT_0},
-		{DSAF_ROCE_PORT_4, DSAF_ROCE_PORT_2, DSAF_ROCE_PORT_1},
-		{DSAF_ROCE_PORT_4, DSAF_ROCE_PORT_2, DSAF_ROCE_PORT_1},
-		{DSAF_ROCE_PORT_5, DSAF_ROCE_PORT_3, DSAF_ROCE_PORT_1},
-		{DSAF_ROCE_PORT_5, DSAF_ROCE_PORT_3, DSAF_ROCE_PORT_1},
-	};
-	static const u32 sl_map[DSAF_ROCE_CREDIT_CHN][DSAF_ROCE_CHAN_MODE_NUM] = {
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_0, DSAF_ROCE_SL_0},
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_1, DSAF_ROCE_SL_1},
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_0, DSAF_ROCE_SL_2},
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_1, DSAF_ROCE_SL_3},
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_0, DSAF_ROCE_SL_0},
-		{DSAF_ROCE_SL_1, DSAF_ROCE_SL_1, DSAF_ROCE_SL_1},
-		{DSAF_ROCE_SL_0, DSAF_ROCE_SL_0, DSAF_ROCE_SL_2},
-		{DSAF_ROCE_SL_1, DSAF_ROCE_SL_1, DSAF_ROCE_SL_3},
-	};
-
-	/* find the platform device corresponding to fwnode */
-	if (is_of_node(dsaf_fwnode)) {
-		pdev = of_find_device_by_node(to_of_node(dsaf_fwnode));
-	} else if (is_acpi_device_node(dsaf_fwnode)) {
-		pdev = hns_dsaf_find_platform_device(dsaf_fwnode);
-	} else {
-		pr_err("fwnode is neither OF or ACPI type\n");
-		return -EINVAL;
-	}
-
-	/* check if we were a success in fetching pdev */
-	if (!pdev) {
-		pr_err("couldn't find platform device for node\n");
-		return -ENODEV;
-	}
-
-	/* retrieve the dsaf_device from the driver data */
-	dsaf_dev = dev_get_drvdata(&pdev->dev);
-	if (!dsaf_dev) {
-		dev_err(&pdev->dev, "dsaf_dev is NULL\n");
-		put_device(&pdev->dev);
-		return -ENODEV;
-	}
-
-	/* now, make sure we are running on compatible SoC */
-	if (AE_IS_VER1(dsaf_dev->dsaf_ver)) {
-		dev_err(dsaf_dev->dev, "%s v1 chip doesn't support RoCE!\n",
-			dsaf_dev->ae_dev.name);
-		put_device(&pdev->dev);
-		return -ENODEV;
-	}
-
-	/* do reset or de-reset according to the flag */
-	if (!dereset) {
-		/* reset rocee-channels in dsaf and rocee */
-		dsaf_dev->misc_op->hns_dsaf_srst_chns(dsaf_dev, DSAF_CHNS_MASK,
-						      false);
-		dsaf_dev->misc_op->hns_dsaf_roce_srst(dsaf_dev, false);
-	} else {
-		/* configure dsaf tx roce correspond to port map and sl map */
-		mp = dsaf_read_dev(dsaf_dev, DSAF_ROCE_PORT_MAP_REG);
-		for (i = 0; i < DSAF_ROCE_CREDIT_CHN; i++)
-			dsaf_set_field(mp, 7 << i * 3, i * 3,
-				       port_map[i][DSAF_ROCE_6PORT_MODE]);
-		dsaf_set_field(mp, 3 << i * 3, i * 3, 0);
-		dsaf_write_dev(dsaf_dev, DSAF_ROCE_PORT_MAP_REG, mp);
-
-		sl = dsaf_read_dev(dsaf_dev, DSAF_ROCE_SL_MAP_REG);
-		for (i = 0; i < DSAF_ROCE_CREDIT_CHN; i++)
-			dsaf_set_field(sl, 3 << i * 2, i * 2,
-				       sl_map[i][DSAF_ROCE_6PORT_MODE]);
-		dsaf_write_dev(dsaf_dev, DSAF_ROCE_SL_MAP_REG, sl);
-
-		/* de-reset rocee-channels in dsaf and rocee */
-		dsaf_dev->misc_op->hns_dsaf_srst_chns(dsaf_dev, DSAF_CHNS_MASK,
-						      true);
-		msleep(SRST_TIME_INTERVAL);
-		dsaf_dev->misc_op->hns_dsaf_roce_srst(dsaf_dev, true);
-
-		/* enable dsaf channel rocee credit */
-		credit = dsaf_read_dev(dsaf_dev, DSAF_SBM_ROCEE_CFG_REG_REG);
-		dsaf_set_bit(credit, DSAF_SBM_ROCEE_CFG_CRD_EN_B, 0);
-		dsaf_write_dev(dsaf_dev, DSAF_SBM_ROCEE_CFG_REG_REG, credit);
-
-		dsaf_set_bit(credit, DSAF_SBM_ROCEE_CFG_CRD_EN_B, 1);
-		dsaf_write_dev(dsaf_dev, DSAF_SBM_ROCEE_CFG_REG_REG, credit);
-	}
-
-	put_device(&pdev->dev);
-
-	return 0;
-}
-EXPORT_SYMBOL(hns_dsaf_roce_reset);
-
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
 MODULE_DESCRIPTION("HNS DSAF driver");
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.h b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.h
index 0eb03dff1a8b..c90f41c75500 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.h
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.h
@@ -463,6 +463,4 @@ int hns_dsaf_clr_mac_mc_port(struct dsaf_device *dsaf_dev,
 			     u8 mac_id, u8 port_num);
 int hns_dsaf_wait_pkt_clean(struct dsaf_device *dsaf_dev, int port);
 
-int hns_dsaf_roce_reset(struct fwnode_handle *dsaf_fwnode, bool dereset);
-
 #endif /* __HNS_DSAF_MAIN_H__ */
-- 
2.47.1