net: hns3: add ethtool_ops.set_channels support for HNS3 VF driver

This patch adds ethtool_ops.set_channels support for HNS3 VF driver,
and updates related TQP information and RSS information, to support
modification of VF TQP number, and uses current rss_size instead of
max_rss_size to initialize RSS.

Also, fixes a format error in hclgevf_get_rss().

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index aa692b1..f5a681d 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -1397,6 +1397,7 @@ static const struct ethtool_ops hns3vf_ethtool_ops = {
        .set_rxfh = hns3_set_rss,
        .get_link_ksettings = hns3_get_link_ksettings,
        .get_channels = hns3_get_channels,
+       .set_channels = hns3_set_channels,
        .get_coalesce = hns3_get_coalesce,
        .set_coalesce = hns3_set_coalesce,
        .get_regs_len = hns3_get_regs_len,

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 594cae8..e3090b3 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -743,7 +743,7 @@ static int hclgevf_get_rss(struct hnae3_handle *handle, u32 *indir, u8 *key,
 }
 
 static int hclgevf_set_rss(struct hnae3_handle *handle, const u32 *indir,
-                          const  u8 *key, const  u8 hfunc)
+                          const u8 *key, const u8 hfunc)
 {
        struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
        struct hclgevf_rss_cfg *rss_cfg = &hdev->rss_cfg;
@@ -2060,9 +2060,10 @@ static int hclgevf_config_gro(struct hclgevf_dev *hdev, bool en)
 static int hclgevf_rss_init_hw(struct hclgevf_dev *hdev)
 {
        struct hclgevf_rss_cfg *rss_cfg = &hdev->rss_cfg;
-       int i, ret;
+       int ret;
+       u32 i;
 
-       rss_cfg->rss_size = hdev->rss_size_max;
+       rss_cfg->rss_size = hdev->nic.kinfo.rss_size;
 
        if (hdev->pdev->revision >= 0x21) {
                rss_cfg->hash_algo = HCLGEVF_RSS_HASH_ALGO_SIMPLE;
@@ -2099,13 +2100,13 @@ static int hclgevf_rss_init_hw(struct hclgevf_dev *hdev)
 
        /* Initialize RSS indirect table */
        for (i = 0; i < HCLGEVF_RSS_IND_TBL_SIZE; i++)
-               rss_cfg->rss_indirection_tbl[i] = i % hdev->rss_size_max;
+               rss_cfg->rss_indirection_tbl[i] = i % rss_cfg->rss_size;
 
        ret = hclgevf_set_rss_indir_table(hdev);
        if (ret)
                return ret;
 
-       return hclgevf_set_rss_tc_mode(hdev, hdev->rss_size_max);
+       return hclgevf_set_rss_tc_mode(hdev, rss_cfg->rss_size);
 }
 
 static int hclgevf_init_vlan_config(struct hclgevf_dev *hdev)
@@ -2835,6 +2836,77 @@ static void hclgevf_get_tqps_and_rss_info(struct hnae3_handle *handle,
        *max_rss_size = hdev->rss_size_max;
 }
 
+static void hclgevf_update_rss_size(struct hnae3_handle *handle,
+                                   u32 new_tqps_num)
+{
+       struct hnae3_knic_private_info *kinfo = &handle->kinfo;
+       struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
+       u16 max_rss_size;
+
+       kinfo->req_rss_size = new_tqps_num;
+
+       max_rss_size = min_t(u16, hdev->rss_size_max,
+                            hdev->num_tqps / kinfo->num_tc);
+
+       /* Use the user's configuration when it is not larger than
+        * max_rss_size, otherwise, use the maximum specification value.
+        */
+       if (kinfo->req_rss_size != kinfo->rss_size && kinfo->req_rss_size &&
+           kinfo->req_rss_size <= max_rss_size)
+               kinfo->rss_size = kinfo->req_rss_size;
+       else if (kinfo->rss_size > max_rss_size ||
+                (!kinfo->req_rss_size && kinfo->rss_size < max_rss_size))
+               kinfo->rss_size = max_rss_size;
+
+       kinfo->num_tqps = kinfo->num_tc * kinfo->rss_size;
+}
+
+static int hclgevf_set_channels(struct hnae3_handle *handle, u32 new_tqps_num,
+                               bool rxfh_configured)
+{
+       struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
+       struct hnae3_knic_private_info *kinfo = &handle->kinfo;
+       u16 cur_rss_size = kinfo->rss_size;
+       u16 cur_tqps = kinfo->num_tqps;
+       u32 *rss_indir;
+       unsigned int i;
+       int ret;
+
+       hclgevf_update_rss_size(handle, new_tqps_num);
+
+       ret = hclgevf_set_rss_tc_mode(hdev, kinfo->rss_size);
+       if (ret)
+               return ret;
+
+       /* RSS indirection table has been configuared by user */
+       if (rxfh_configured)
+               goto out;
+
+       /* Reinitializes the rss indirect table according to the new RSS size */
+       rss_indir = kcalloc(HCLGEVF_RSS_IND_TBL_SIZE, sizeof(u32), GFP_KERNEL);
+       if (!rss_indir)
+               return -ENOMEM;
+
+       for (i = 0; i < HCLGEVF_RSS_IND_TBL_SIZE; i++)
+               rss_indir[i] = i % kinfo->rss_size;
+
+       ret = hclgevf_set_rss(handle, rss_indir, NULL, 0);
+       if (ret)
+               dev_err(&hdev->pdev->dev, "set rss indir table fail, ret=%d\n",
+                       ret);
+
+       kfree(rss_indir);
+
+out:
+       if (!ret)
+               dev_info(&hdev->pdev->dev,
+                        "Channels changed, rss_size from %u to %u, tqps from %u to %u",
+                        cur_rss_size, kinfo->rss_size,
+                        cur_tqps, kinfo->rss_size * kinfo->num_tc);
+
+       return ret;
+}
+
 static int hclgevf_get_status(struct hnae3_handle *handle)
 {
        struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
@@ -3042,6 +3114,7 @@ static const struct hnae3_ae_ops hclgevf_ops = {
        .enable_hw_strip_rxvtag = hclgevf_en_hw_strip_rxvtag,
        .reset_event = hclgevf_reset_event,
        .set_default_reset_request = hclgevf_set_def_reset_request,
+       .set_channels = hclgevf_set_channels,
        .get_channels = hclgevf_get_channels,
        .get_tqps_and_rss_info = hclgevf_get_tqps_and_rss_info,
        .get_regs_len = hclgevf_get_regs_len,