[dpdk-dev] [PATCH 09/17] net/hns3: fix RSS indirection table size

[Lijun Ou <oulijun@huawei.com>]

the driver should not use the fixed value as the validity check of
RSS indirection table size with HW supported. As a result, it will
cause misjudgment when the RSS reta size with HW supported have
changed.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org

Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 drivers/net/hns3/hns3_cmd.c       | 11 +++++++++++
 drivers/net/hns3/hns3_cmd.h       |  7 ++++++-
 drivers/net/hns3/hns3_dcb.c       |  2 +-
 drivers/net/hns3/hns3_ethdev.c    | 18 ++++++++++++++++--
 drivers/net/hns3/hns3_ethdev_vf.c | 18 ++++++++++++++++--
 drivers/net/hns3/hns3_flow.c      |  6 +++---
 drivers/net/hns3/hns3_rss.c       | 28 ++++++++++++++--------------
 drivers/net/hns3/hns3_rss.h       |  5 ++---
 8 files changed, 69 insertions(+), 26 deletions(-)

diff --git a/drivers/net/hns3/hns3_cmd.c b/drivers/net/hns3/hns3_cmd.c
index 9ed8161..b750022 100644
--- a/drivers/net/hns3/hns3_cmd.c
+++ b/drivers/net/hns3/hns3_cmd.c
@@ -430,6 +430,16 @@ static void hns3_parse_capability(struct hns3_hw *hw,
 		hns3_set_bit(hw->capability, HNS3_DEV_SUPPORT_STASH_B, 1);
 }
 
+static uint32_t
+hns3_build_api_caps(void)
+{
+	uint32_t api_caps = 0;
+
+	hns3_set_bit(api_caps, HNS3_API_CAP_FLEX_RSS_TBL_B, 1);
+
+	return rte_cpu_to_le_32(api_caps);
+}
+
 static enum hns3_cmd_status
 hns3_cmd_query_firmware_version_and_capability(struct hns3_hw *hw)
 {
@@ -439,6 +449,7 @@ hns3_cmd_query_firmware_version_and_capability(struct hns3_hw *hw)
 
 	hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_QUERY_FW_VER, 1);
 	resp = (struct hns3_query_version_cmd *)desc.data;
+	resp->api_caps = hns3_build_api_caps();
 
 	/* Initialize the cmd function */
 	ret = hns3_cmd_send(hw, &desc, 1);
diff --git a/drivers/net/hns3/hns3_cmd.h b/drivers/net/hns3/hns3_cmd.h
index e5ca74e..c6c4093 100644
--- a/drivers/net/hns3/hns3_cmd.h
+++ b/drivers/net/hns3/hns3_cmd.h
@@ -312,11 +312,16 @@ enum HNS3_CAPS_BITS {
 	HNS3_CAPS_HW_PAD_B,
 	HNS3_CAPS_STASH_B,
 };
+
+enum HNS3_API_CAP_BITS {
+	HNS3_API_CAP_FLEX_RSS_TBL_B,
+};
+
 #define HNS3_QUERY_CAP_LENGTH		3
 struct hns3_query_version_cmd {
 	uint32_t firmware;
 	uint32_t hardware;
-	uint32_t rsv;
+	uint32_t api_caps;
 	uint32_t caps[HNS3_QUERY_CAP_LENGTH]; /* capabilities of device */
 };
 
diff --git a/drivers/net/hns3/hns3_dcb.c b/drivers/net/hns3/hns3_dcb.c
index 4fe5956..ebfc240 100644
--- a/drivers/net/hns3/hns3_dcb.c
+++ b/drivers/net/hns3/hns3_dcb.c
@@ -656,7 +656,7 @@ hns3_set_rss_size(struct hns3_hw *hw, uint16_t nb_rx_q)
 	 * stage of the reset process.
 	 */
 	if (__atomic_load_n(&hw->reset.resetting, __ATOMIC_RELAXED) == 0) {
-		for (i = 0; i < HNS3_RSS_IND_TBL_SIZE; i++)
+		for (i = 0; i < hw->rss_ind_tbl_size; i++)
 			rss_cfg->rss_indirection_tbl[i] =
 							i % hw->alloc_rss_size;
 	}
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index a92399f..9d2e4d2 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2593,7 +2593,7 @@ hns3_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
 
 	info->vmdq_queue_num = 0;
 
-	info->reta_size = HNS3_RSS_IND_TBL_SIZE;
+	info->reta_size = hw->rss_ind_tbl_size;
 	info->hash_key_size = HNS3_RSS_KEY_SIZE;
 	info->flow_type_rss_offloads = HNS3_ETH_RSS_SUPPORT;
 
@@ -2984,6 +2984,20 @@ hns3_parse_dev_specifications(struct hns3_hw *hw, struct hns3_cmd_desc *desc)
 }
 
 static int
+hns3_check_dev_specifications(struct hns3_hw *hw)
+{
+	if (hw->rss_ind_tbl_size == 0 ||
+	    hw->rss_ind_tbl_size > HNS3_RSS_IND_TBL_SIZE_MAX) {
+		hns3_err(hw, "the size of hash lookup table configured (%u)"
+			      " exceeds the maximum(%u)", hw->rss_ind_tbl_size,
+			      HNS3_RSS_IND_TBL_SIZE_MAX);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
 hns3_query_dev_specifications(struct hns3_hw *hw)
 {
 	struct hns3_cmd_desc desc[HNS3_QUERY_DEV_SPECS_BD_NUM];
@@ -3003,7 +3017,7 @@ hns3_query_dev_specifications(struct hns3_hw *hw)
 
 	hns3_parse_dev_specifications(hw, desc);
 
-	return 0;
+	return hns3_check_dev_specifications(hw);
 }
 
 static int
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 11cab37..b3dd40a 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -1016,7 +1016,7 @@ hns3vf_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
 
 	info->vmdq_queue_num = 0;
 
-	info->reta_size = HNS3_RSS_IND_TBL_SIZE;
+	info->reta_size = hw->rss_ind_tbl_size;
 	info->hash_key_size = HNS3_RSS_KEY_SIZE;
 	info->flow_type_rss_offloads = HNS3_ETH_RSS_SUPPORT;
 	info->default_rxportconf.ring_size = HNS3_DEFAULT_RING_DESC;
@@ -1149,6 +1149,20 @@ hns3vf_parse_dev_specifications(struct hns3_hw *hw, struct hns3_cmd_desc *desc)
 }
 
 static int
+hns3vf_check_dev_specifications(struct hns3_hw *hw)
+{
+	if (hw->rss_ind_tbl_size == 0 ||
+	    hw->rss_ind_tbl_size > HNS3_RSS_IND_TBL_SIZE_MAX) {
+		hns3_warn(hw, "the size of hash lookup table configured (%u)"
+			      " exceeds the maximum(%u)", hw->rss_ind_tbl_size,
+			      HNS3_RSS_IND_TBL_SIZE_MAX);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
 hns3vf_query_dev_specifications(struct hns3_hw *hw)
 {
 	struct hns3_cmd_desc desc[HNS3_QUERY_DEV_SPECS_BD_NUM];
@@ -1168,7 +1182,7 @@ hns3vf_query_dev_specifications(struct hns3_hw *hw)
 
 	hns3vf_parse_dev_specifications(hw, desc);
 
-	return 0;
+	return hns3vf_check_dev_specifications(hw);
 }
 
 static int
diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index 3e387ac..a601124 100644
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -1489,14 +1489,14 @@ hns3_update_indir_table(struct rte_eth_dev *dev,
 {
 	struct hns3_adapter *hns = dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
-	uint16_t indir_tbl[HNS3_RSS_IND_TBL_SIZE];
+	uint16_t indir_tbl[HNS3_RSS_IND_TBL_SIZE_MAX];
 	uint16_t j;
 	uint32_t i;
 
 	/* Fill in redirection table */
 	memcpy(indir_tbl, hw->rss_info.rss_indirection_tbl,
 	       sizeof(hw->rss_info.rss_indirection_tbl));
-	for (i = 0, j = 0; i < HNS3_RSS_IND_TBL_SIZE; i++, j++) {
+	for (i = 0, j = 0; i < hw->rss_ind_tbl_size; i++, j++) {
 		j %= num;
 		if (conf->queue[j] >= hw->alloc_rss_size) {
 			hns3_err(hw, "queue id(%u) set to redirection table "
@@ -1507,7 +1507,7 @@ hns3_update_indir_table(struct rte_eth_dev *dev,
 		indir_tbl[i] = conf->queue[j];
 	}
 
-	return hns3_set_rss_indir_table(hw, indir_tbl, HNS3_RSS_IND_TBL_SIZE);
+	return hns3_set_rss_indir_table(hw, indir_tbl, hw->rss_ind_tbl_size);
 }
 
 static int
diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index 7d1a297..858e31a 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -312,7 +312,7 @@ hns3_set_rss_indir_table(struct hns3_hw *hw, uint16_t *indir, uint16_t size)
 
 	/* Update redirection table of hw */
 	memcpy(hw->rss_info.rss_indirection_tbl, indir,
-	       sizeof(hw->rss_info.rss_indirection_tbl));
+	       sizeof(uint16_t) * size);
 
 	return 0;
 }
@@ -324,13 +324,13 @@ hns3_rss_reset_indir_table(struct hns3_hw *hw)
 	int ret;
 
 	lut = rte_zmalloc("hns3_rss_lut",
-			  HNS3_RSS_IND_TBL_SIZE * sizeof(uint16_t), 0);
+			  hw->rss_ind_tbl_size * sizeof(uint16_t), 0);
 	if (lut == NULL) {
 		hns3_err(hw, "No hns3_rss_lut memory can be allocated");
 		return -ENOMEM;
 	}
 
-	ret = hns3_set_rss_indir_table(hw, lut, HNS3_RSS_IND_TBL_SIZE);
+	ret = hns3_set_rss_indir_table(hw, lut, hw->rss_ind_tbl_size);
 	if (ret)
 		hns3_err(hw, "RSS uninit indir table failed: %d", ret);
 	rte_free(lut);
@@ -428,7 +428,7 @@ hns3_dev_rss_hash_update(struct rte_eth_dev *dev,
 	} 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,
-					       HNS3_RSS_IND_TBL_SIZE);
+					       hw->rss_ind_tbl_size);
 		if (ret)
 			goto conf_err;
 	}
@@ -505,15 +505,15 @@ hns3_dev_rss_reta_update(struct rte_eth_dev *dev,
 	struct hns3_adapter *hns = dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
 	struct hns3_rss_conf *rss_cfg = &hw->rss_info;
-	uint16_t i, indir_size = HNS3_RSS_IND_TBL_SIZE; /* Table size is 512 */
-	uint16_t indirection_tbl[HNS3_RSS_IND_TBL_SIZE];
+	uint16_t indirection_tbl[HNS3_RSS_IND_TBL_SIZE_MAX];
 	uint16_t idx, shift;
+	uint16_t i;
 	int ret;
 
-	if (reta_size != indir_size || reta_size > ETH_RSS_RETA_SIZE_512) {
+	if (reta_size != hw->rss_ind_tbl_size) {
 		hns3_err(hw, "The size of hash lookup table configured (%u)"
 			 "doesn't match the number hardware can supported"
-			 "(%u)", reta_size, indir_size);
+			 "(%u)", reta_size, hw->rss_ind_tbl_size);
 		return -EINVAL;
 	}
 	rte_spinlock_lock(&hw->lock);
@@ -536,7 +536,7 @@ hns3_dev_rss_reta_update(struct rte_eth_dev *dev,
 	}
 
 	ret = hns3_set_rss_indir_table(hw, indirection_tbl,
-				       HNS3_RSS_IND_TBL_SIZE);
+				       hw->rss_ind_tbl_size);
 
 	rte_spinlock_unlock(&hw->lock);
 	return ret;
@@ -561,13 +561,13 @@ hns3_dev_rss_reta_query(struct rte_eth_dev *dev,
 	struct hns3_adapter *hns = dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
 	struct hns3_rss_conf *rss_cfg = &hw->rss_info;
-	uint16_t i, indir_size = HNS3_RSS_IND_TBL_SIZE; /* Table size is 512 */
 	uint16_t idx, shift;
+	uint16_t i;
 
-	if (reta_size != indir_size || reta_size > ETH_RSS_RETA_SIZE_512) {
+	if (reta_size != hw->rss_ind_tbl_size) {
 		hns3_err(hw, "The size of hash lookup table configured (%u)"
 			 " doesn't match the number hardware can supported"
-			 "(%u)", reta_size, indir_size);
+			 "(%u)", reta_size, hw->rss_ind_tbl_size);
 		return -EINVAL;
 	}
 	rte_spinlock_lock(&hw->lock);
@@ -662,7 +662,7 @@ hns3_rss_set_default_args(struct hns3_hw *hw)
 	memcpy(rss_cfg->key, hns3_hash_key, HNS3_RSS_KEY_SIZE);
 
 	/* Initialize RSS indirection table */
-	for (i = 0; i < HNS3_RSS_IND_TBL_SIZE; i++)
+	for (i = 0; i < hw->rss_ind_tbl_size; i++)
 		rss_cfg->rss_indirection_tbl[i] = i % queue_num;
 }
 
@@ -711,7 +711,7 @@ hns3_config_rss(struct hns3_adapter *hns)
 	 */
 	if (((uint32_t)mq_mode & ETH_MQ_RX_RSS_FLAG)) {
 		ret = hns3_set_rss_indir_table(hw, rss_cfg->rss_indirection_tbl,
-					       HNS3_RSS_IND_TBL_SIZE);
+					       hw->rss_ind_tbl_size);
 		if (ret)
 			goto rss_tuple_uninit;
 	}
diff --git a/drivers/net/hns3/hns3_rss.h b/drivers/net/hns3/hns3_rss.h
index 05d5c26..94668ed 100644
--- a/drivers/net/hns3/hns3_rss.h
+++ b/drivers/net/hns3/hns3_rss.h
@@ -24,9 +24,8 @@
 	ETH_RSS_L4_DST_ONLY)
 
 #define HNS3_RSS_IND_TBL_SIZE	512 /* The size of hash lookup table */
+#define HNS3_RSS_IND_TBL_SIZE_MAX 2048
 #define HNS3_RSS_KEY_SIZE	40
-#define HNS3_RSS_CFG_TBL_NUM \
-	(HNS3_RSS_IND_TBL_SIZE / HNS3_RSS_CFG_TBL_SIZE)
 #define HNS3_RSS_SET_BITMAP_MSK	0xffff
 
 #define HNS3_RSS_HASH_ALGO_TOEPLITZ	0
@@ -45,7 +44,7 @@ struct hns3_rss_conf {
 	uint8_t hash_algo; /* hash function type definited by hardware */
 	uint8_t key[HNS3_RSS_KEY_SIZE];  /* Hash key */
 	struct hns3_rss_tuple_cfg rss_tuple_sets;
-	uint16_t rss_indirection_tbl[HNS3_RSS_IND_TBL_SIZE]; /* Shadow table */
+	uint16_t rss_indirection_tbl[HNS3_RSS_IND_TBL_SIZE_MAX];
 	uint16_t queue[HNS3_RSS_QUEUES_BUFFER_NUM]; /* Queues indices to use */
 	bool valid; /* check if RSS rule is valid */
 	/*
-- 
2.7.4