patch 'net/hns3: refactor set RSS hash algorithm and key interface' has been queued to stable release 21.11.4

[Kevin Traynor <ktraynor@redhat.com>]

Hi,

FYI, your patch has been queued to stable release 21.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/28/23. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/abe093c214892f726133e1dc9e66fb58901392ee

Thanks.

Kevin

---
From abe093c214892f726133e1dc9e66fb58901392ee Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong@huawei.com>
Date: Tue, 31 Jan 2023 21:02:53 +0800
Subject: [PATCH] net/hns3: refactor set RSS hash algorithm and key interface

[ upstream commit 88347111eb53bc54c598dde81715a06ca1dbd132 ]

The hns3_rss_set_algo_key() is used to set RSS hash algorithm and key to
hardware.
The maximum execution time of the command sent to the firmware is
proportional to the length of the key.
However, now this times is fixed, which isn't good for key expansion.

In addition, hash algorithm comes from rss_info::hash_algo maintained in
the driver, which also isn't good for the usage of this function.

Interface is updated to get hash algorithm and key length as input
parameters.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/net/hns3/hns3_flow.c |  3 ++-
 drivers/net/hns3/hns3_rss.c  | 48 ++++++++++++++++--------------------
 drivers/net/hns3/hns3_rss.h  |  4 ++-
 3 files changed, 26 insertions(+), 29 deletions(-)

diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index a9256569e3..d2eab7e289 100644
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -1448,5 +1448,6 @@ hns3_hw_rss_hash_set(struct hns3_hw *hw, struct rte_flow_action_rss *rss_config)
 		return ret;
 
-	ret = hns3_rss_set_algo_key(hw, rss_config->key);
+	ret = hns3_rss_set_algo_key(hw, hw->rss_info.hash_algo,
+				    rss_config->key, HNS3_RSS_KEY_SIZE);
 	if (ret)
 		return ret;
diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index 4560b8522c..23c367d16a 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -278,43 +278,35 @@ static const struct {
 /*
  * rss_generic_config command function, opcode:0x0D01.
- * Used to set algorithm, key_offset and hash key of rss.
+ * Used to set algorithm and hash key of RSS.
  */
 int
-hns3_rss_set_algo_key(struct hns3_hw *hw, const uint8_t *key)
+hns3_rss_set_algo_key(struct hns3_hw *hw, uint8_t hash_algo,
+		      const uint8_t *key, uint8_t key_len)
 {
-#define HNS3_KEY_OFFSET_MAX	3
-#define HNS3_SET_HASH_KEY_BYTE_FOUR	2
-
 	struct hns3_rss_generic_config_cmd *req;
 	struct hns3_cmd_desc desc;
-	uint32_t key_offset, key_size;
-	const uint8_t *key_cur;
-	uint8_t cur_offset;
+	const uint8_t *cur_key;
+	uint16_t cur_key_size;
+	uint16_t max_bd_num;
+	uint16_t idx;
 	int ret;
 
 	req = (struct hns3_rss_generic_config_cmd *)desc.data;
 
-	/*
-	 * key_offset=0, hash key byte0~15 is set to hardware.
-	 * key_offset=1, hash key byte16~31 is set to hardware.
-	 * key_offset=2, hash key byte32~39 is set to hardware.
-	 */
-	for (key_offset = 0; key_offset < HNS3_KEY_OFFSET_MAX; key_offset++) {
+	max_bd_num = DIV_ROUND_UP(key_len, HNS3_RSS_HASH_KEY_NUM);
+	for (idx = 0; idx < max_bd_num; idx++) {
 		hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_RSS_GENERIC_CONFIG,
 					  false);
 
-		req->hash_config |=
-			(hw->rss_info.hash_algo & HNS3_RSS_HASH_ALGO_MASK);
-		req->hash_config |= (key_offset << HNS3_RSS_HASH_KEY_OFFSET_B);
+		req->hash_config |= (hash_algo & HNS3_RSS_HASH_ALGO_MASK);
+		req->hash_config |= (idx << HNS3_RSS_HASH_KEY_OFFSET_B);
 
-		if (key_offset == HNS3_SET_HASH_KEY_BYTE_FOUR)
-			key_size = HNS3_RSS_KEY_SIZE - HNS3_RSS_HASH_KEY_NUM *
-			HNS3_SET_HASH_KEY_BYTE_FOUR;
+		if (idx == max_bd_num - 1)
+			cur_key_size = key_len % HNS3_RSS_HASH_KEY_NUM;
 		else
-			key_size = HNS3_RSS_HASH_KEY_NUM;
+			cur_key_size = HNS3_RSS_HASH_KEY_NUM;
 
-		cur_offset = key_offset * HNS3_RSS_HASH_KEY_NUM;
-		key_cur = key + cur_offset;
-		memcpy(req->hash_key, key_cur, key_size);
+		cur_key = key + idx * HNS3_RSS_HASH_KEY_NUM;
+		memcpy(req->hash_key, cur_key, cur_key_size);
 
 		ret = hns3_cmd_send(hw, &desc, 1);
@@ -519,5 +511,6 @@ hns3_dev_rss_hash_update(struct rte_eth_dev *dev,
 
 	if (key) {
-		ret = hns3_rss_set_algo_key(hw, key);
+		ret = hns3_rss_set_algo_key(hw, hw->rss_info.hash_algo,
+					    key, HNS3_RSS_KEY_SIZE);
 		if (ret)
 			goto set_algo_key_fail;
@@ -796,6 +789,7 @@ hns3_config_rss(struct hns3_adapter *hns)
 	}
 
-	/* Configure RSS hash algorithm and hash key offset */
-	ret = hns3_rss_set_algo_key(hw, hash_key);
+	/* Configure RSS hash algorithm and hash key */
+	ret = hns3_rss_set_algo_key(hw, hw->rss_info.hash_algo, hash_key,
+				    HNS3_RSS_KEY_SIZE);
 	if (ret)
 		return ret;
diff --git a/drivers/net/hns3/hns3_rss.h b/drivers/net/hns3/hns3_rss.h
index 071b47b2ec..bc5b14e17b 100644
--- a/drivers/net/hns3/hns3_rss.h
+++ b/drivers/net/hns3/hns3_rss.h
@@ -112,5 +112,7 @@ int hns3_config_rss(struct hns3_adapter *hns);
 void hns3_rss_uninit(struct hns3_adapter *hns);
 int hns3_set_rss_tuple_by_rss_hf(struct hns3_hw *hw, uint64_t rss_hf);
-int hns3_rss_set_algo_key(struct hns3_hw *hw, const uint8_t *key);
+int hns3_rss_set_algo_key(struct hns3_hw *hw, uint8_t hash_algo,
+			  const uint8_t *key, uint8_t key_len);
+
 
 #endif /* _HNS3_RSS_H_ */
-- 
2.39.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-02-23 14:46:25.217331947 +0000
+++ 0058-net-hns3-refactor-set-RSS-hash-algorithm-and-key-int.patch	2023-02-23 14:46:23.805236088 +0000
@@ -1 +1 @@
-From 88347111eb53bc54c598dde81715a06ca1dbd132 Mon Sep 17 00:00:00 2001
+From abe093c214892f726133e1dc9e66fb58901392ee Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 88347111eb53bc54c598dde81715a06ca1dbd132 ]
+
@@ -19 +20,0 @@
-Cc: stable@dpdk.org
@@ -30 +31 @@
-index e88f9b7e45..ac094c839f 100644
+index a9256569e3..d2eab7e289 100644
@@ -33 +34 @@
-@@ -1495,5 +1495,6 @@ hns3_hw_rss_hash_set(struct hns3_hw *hw, struct rte_flow_action_rss *rss_config)
+@@ -1448,5 +1448,6 @@ hns3_hw_rss_hash_set(struct hns3_hw *hw, struct rte_flow_action_rss *rss_config)
@@ -42 +43 @@
-index ca5a129234..3db7bf0445 100644
+index 4560b8522c..23c367d16a 100644
@@ -124 +125 @@
-index 8e8b056f4e..b7f62ca1ee 100644
+index 071b47b2ec..bc5b14e17b 100644
@@ -127 +128 @@
-@@ -110,5 +110,7 @@ int hns3_config_rss(struct hns3_adapter *hns);
+@@ -112,5 +112,7 @@ int hns3_config_rss(struct hns3_adapter *hns);
@@ -135 +136 @@
- #endif /* HNS3_RSS_H */
+ #endif /* _HNS3_RSS_H_ */