[5/7] net/hns3: fix RSS disable
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Commit Message
From: Huisong Li <lihuisong@huawei.com>
Currently, hns3 PMD disable RSS by resetting redirection table when user
set rss_hf to 0 so as to all packets go to queue 0. The implementation may
cause following problems:
1) the same type packet may go to different queue on the case of disableing
all tuples and partial tuples. The problem is determined by hardware
design.
2) affect the configuration of redirection table and user experience.
For hns3 hardware, the packets with RSS disabled are always go to the queue
corresponding to first entry of the redirection table. Genernally, disable
RSS should be implemented by disabling all tuples, This patch fix the
implementation.
Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
drivers/net/hns3/hns3_ethdev.c | 1 -
drivers/net/hns3/hns3_ethdev_vf.c | 1 -
drivers/net/hns3/hns3_flow.c | 6 +-
drivers/net/hns3/hns3_rss.c | 93 ++++++-------------------------
4 files changed, 18 insertions(+), 83 deletions(-)
Comments
On 4/6/2022 10:22 AM, Min Hu (Connor) wrote:
> From: Huisong Li <lihuisong@huawei.com>
>
> Currently, hns3 PMD disable RSS by resetting redirection table when user
> set rss_hf to 0 so as to all packets go to queue 0. The implementation may
> cause following problems:
> 1) the same type packet may go to different queue on the case of disableing
typo, disabling
> all tuples and partial tuples. The problem is determined by hardware
> design.
> 2) affect the configuration of redirection table and user experience.
>
> For hns3 hardware, the packets with RSS disabled are always go to the queue
> corresponding to first entry of the redirection table. Genernally, disable
typo, generally
> RSS should be implemented by disabling all tuples, This patch fix the
> implementation.
>
ack
> Fixes: c37ca66f2b27 ("net/hns3: support RSS")
> Cc: stable@dpdk.org
>
> Signed-off-by: Huisong Li <lihuisong@huawei.com>
> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
<...>
@@ -2015,7 +2015,6 @@ hns3_dev_configure(struct rte_eth_dev *dev)
goto cfg_err;
}
- /* When RSS is not configured, redirect the packet queue 0 */
if ((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) {
conf->rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH;
rss_conf = conf->rx_adv_conf.rss_conf;
@@ -492,7 +492,6 @@ hns3vf_dev_configure(struct rte_eth_dev *dev)
goto cfg_err;
}
- /* When RSS is not configured, redirect the packet queue 0 */
if ((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) {
conf->rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH;
rss_conf = conf->rx_adv_conf.rss_conf;
@@ -1446,14 +1446,10 @@ hns3_disable_rss(struct hns3_hw *hw)
{
int ret;
- /* Redirected the redirection table to queue 0 */
- ret = hns3_rss_reset_indir_table(hw);
+ ret = hns3_set_rss_tuple_by_rss_hf(hw, &hw->rss_info.rss_tuple_sets, 0);
if (ret)
return ret;
- /* Disable RSS */
- hw->rss_info.conf.types = 0;
-
return 0;
}
@@ -237,31 +237,6 @@ hns3_rss_set_algo_key(struct hns3_hw *hw, const uint8_t *key)
return 0;
}
-/*
- * Used to configure the tuple selection for RSS hash input.
- */
-static int
-hns3_rss_set_input_tuple(struct hns3_hw *hw)
-{
- struct hns3_rss_conf *rss_config = &hw->rss_info;
- struct hns3_rss_input_tuple_cmd *req;
- struct hns3_cmd_desc desc_tuple;
- int ret;
-
- hns3_cmd_setup_basic_desc(&desc_tuple, HNS3_OPC_RSS_INPUT_TUPLE, false);
-
- req = (struct hns3_rss_input_tuple_cmd *)desc_tuple.data;
-
- req->tuple_field =
- rte_cpu_to_le_64(rss_config->rss_tuple_sets.rss_tuple_fields);
-
- ret = hns3_cmd_send(hw, &desc_tuple, 1);
- if (ret)
- hns3_err(hw, "Configure RSS input tuple mode failed %d", ret);
-
- return ret;
-}
-
/*
* rss_indirection_table command function, opcode:0x0D07.
* Used to configure the indirection table of rss.
@@ -382,6 +357,8 @@ hns3_set_rss_tuple_by_rss_hf(struct hns3_hw *hw,
}
tuple->rss_tuple_fields = rte_le_to_cpu_64(req->tuple_field);
+ /* Update supported flow types when set tuple success */
+ hw->rss_info.conf.types = rss_hf;
return 0;
}
@@ -402,7 +379,6 @@ hns3_dev_rss_hash_update(struct rte_eth_dev *dev,
struct hns3_adapter *hns = dev->data->dev_private;
struct hns3_hw *hw = &hns->hw;
struct hns3_rss_tuple_cfg *tuple = &hw->rss_info.rss_tuple_sets;
- struct hns3_rss_conf *rss_cfg = &hw->rss_info;
uint8_t key_len = rss_conf->rss_key_len;
uint64_t rss_hf = rss_conf->rss_hf;
uint8_t *key = rss_conf->rss_key;
@@ -413,22 +389,6 @@ hns3_dev_rss_hash_update(struct rte_eth_dev *dev,
if (ret)
goto conf_err;
- if (rss_cfg->conf.types && rss_hf == 0) {
- /* Disable RSS, reset indirection table by local variable */
- ret = hns3_rss_reset_indir_table(hw);
- if (ret)
- goto conf_err;
- } else if (rss_hf && rss_cfg->conf.types == 0) {
- /* Enable RSS, restore indirection table by hw's config */
- ret = hns3_set_rss_indir_table(hw, rss_cfg->rss_indirection_tbl,
- hw->rss_ind_tbl_size);
- if (ret)
- goto conf_err;
- }
-
- /* Update supported flow types when set tuple success */
- rss_cfg->conf.types = rss_hf;
-
if (key) {
if (key_len != HNS3_RSS_KEY_SIZE) {
hns3_err(hw, "The hash key len(%u) is invalid",
@@ -694,7 +654,8 @@ hns3_config_rss(struct hns3_adapter *hns)
struct hns3_hw *hw = &hns->hw;
struct hns3_rss_conf *rss_cfg = &hw->rss_info;
uint8_t *hash_key = rss_cfg->key;
- int ret, ret1;
+ uint64_t rss_hf;
+ int ret;
enum rte_eth_rx_mq_mode mq_mode = hw->data->dev_conf.rxmode.mq_mode;
@@ -710,51 +671,31 @@ hns3_config_rss(struct hns3_adapter *hns)
break;
}
- /* When RSS is off, redirect the packet queue 0 */
- if (((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) == 0)
- hns3_rss_uninit(hns);
-
/* Configure RSS hash algorithm and hash key offset */
ret = hns3_rss_set_algo_key(hw, hash_key);
if (ret)
return ret;
- /* Configure the tuple selection for RSS hash input */
- ret = hns3_rss_set_input_tuple(hw);
+ ret = hns3_set_rss_indir_table(hw, rss_cfg->rss_indirection_tbl,
+ hw->rss_ind_tbl_size);
if (ret)
return ret;
- /*
- * When RSS is off, it doesn't need to configure rss redirection table
- * to hardware.
- */
- if (((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG)) {
- ret = hns3_set_rss_indir_table(hw, rss_cfg->rss_indirection_tbl,
- hw->rss_ind_tbl_size);
- if (ret)
- goto rss_tuple_uninit;
- }
-
ret = hns3_set_rss_tc_mode(hw);
if (ret)
- goto rss_indir_table_uninit;
-
- return ret;
-
-rss_indir_table_uninit:
- if (((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG)) {
- ret1 = hns3_rss_reset_indir_table(hw);
- if (ret1 != 0)
- return ret;
- }
-
-rss_tuple_uninit:
- hns3_rss_tuple_uninit(hw);
+ return ret;
- /* Disable RSS */
- hw->rss_info.conf.types = 0;
+ /*
+ * When muli-queue RSS mode flag is not set or unsupported tuples are
+ * set, disable all tuples.
+ */
+ rss_hf = hw->rss_info.conf.types;
+ if (!((uint32_t)mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) ||
+ !(rss_hf & HNS3_ETH_RSS_SUPPORT))
+ rss_hf = 0;
- return ret;
+ return hns3_set_rss_tuple_by_rss_hf(hw, &hw->rss_info.rss_tuple_sets,
+ rss_hf);
}
/*