Hi Awal,
As I said in the offline discussion, here are few nits
that I think need to be addressed.
See below.
Konstantin
>
> RSS hash-key-size is retrieved from device configuration instead of using a
> fixed size of 40 bytes.
>
> Fixes: f79959ea1504 ("app/testpmd: allow to configure RSS hash key")
>
> Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal at intel.com>
> ---
> app/test-pmd/cmdline.c | 24 +++++++++++++++++------- app/test-pmd/config.c
> | 17 ++++++++++++++---
> 2 files changed, 31 insertions(+), 10 deletions(-)
>
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index
> f90befc..14412b4 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -1608,7 +1608,6 @@ struct cmd_config_rss_hash_key {
> cmdline_fixed_string_t key;
> };
>
> -#define RSS_HASH_KEY_LENGTH 40
> static uint8_t
> hexa_digit_to_value(char hexa_digit)
> {
> @@ -1640,20 +1639,30 @@ cmd_config_rss_hash_key_parsed(void *parsed_result,
> __attribute__((unused)) void *data) {
> struct cmd_config_rss_hash_key *res = parsed_result;
> - uint8_t hash_key[RSS_HASH_KEY_LENGTH];
> + uint8_t hash_key[16 * 4];
No need for hard-coded constants.
I'd suggest to keep RSS_HASH_KEY_LENGTH, just increase it to 52 (or might be
even bigger) value.
> uint8_t xdgt0;
> uint8_t xdgt1;
> int i;
> + struct rte_eth_dev_info dev_info;
> + uint8_t hash_key_size;
>
> + memset(&dev_info, 0, sizeof(dev_info));
> + rte_eth_dev_info_get(res->port_id, &dev_info);
> + if (dev_info.hash_key_size > 0) {
&& dev_info.hash_key_size <= sizeof(hash_key) {
> + hash_key_size = dev_info.hash_key_size;
> + } else {
> + printf("dev_info did not provide a valid hash key size\n");
> + return;
> + }
> /* Check the length of the RSS hash key */
> - if (strlen(res->key) != (RSS_HASH_KEY_LENGTH * 2)) {
> + if (strlen(res->key) != (hash_key_size * 2)) {
> printf("key length: %d invalid - key must be a string of %d"
> "hexa-decimal numbers\n", (int) strlen(res->key),
> - RSS_HASH_KEY_LENGTH * 2);
> + hash_key_size * 2);
> return;
> }
> /* Translate RSS hash key into binary representation */
> - for (i = 0; i < RSS_HASH_KEY_LENGTH; i++) {
> + for (i = 0; i < hash_key_size; i++) {
> xdgt0 = parse_and_check_key_hexa_digit(res->key, (i * 2));
> if (xdgt0 == 0xFF)
> return;
> @@ -1663,7 +1672,7 @@ cmd_config_rss_hash_key_parsed(void *parsed_result,
> hash_key[i] = (uint8_t) ((xdgt0 * 16) + xdgt1);
> }
> port_rss_hash_key_update(res->port_id, res->rss_type, hash_key,
> - RSS_HASH_KEY_LENGTH);
> + hash_key_size);
> }
>
> cmdline_parse_token_string_t cmd_config_rss_hash_key_port = @@ -1692,7
> +1701,8 @@ cmdline_parse_inst_t
> cmd_config_rss_hash_key = {
> "port config X rss-hash-key ipv4|ipv4-frag|ipv4-tcp|ipv4-udp|"
> "ipv4-sctp|ipv4-other|ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|"
> "ipv6-sctp|ipv6-other|l2-payload|"
> - "ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex 80 hexa digits\n",
> + "ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex "
> + "80 hexa digits (104 hexa digits for fortville)\n",
No need to mention particular NIC (Fortville) here.
I'd say better: 'array of hex digits (variable size, NIC dependent)' or so.
> .tokens = {
> (void *)&cmd_config_rss_hash_key_port,
> (void *)&cmd_config_rss_hash_key_config,
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index
> bfcbff9..851408b 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -1012,14 +1012,25 @@ void
> port_rss_hash_conf_show(portid_t port_id, char rss_info[], int show_rss_key)
> {
> struct rte_eth_rss_conf rss_conf;
> - uint8_t rss_key[10 * 4] = "";
> + uint8_t rss_key[16 * 4] = "";
better rss_key[RSS_HASH_KEY_LENGTH ], and I think there is no need to put '0'
into first element.
> uint64_t rss_hf;
> uint8_t i;
> int diag;
> + struct rte_eth_dev_info dev_info;
> + uint8_t hash_key_size;
>
> if (port_id_is_invalid(port_id, ENABLED_WARN))
> return;
>
> + memset(&dev_info, 0, sizeof(dev_info));
> + rte_eth_dev_info_get(port_id, &dev_info);
> + if (dev_info.hash_key_size > 0) {
> + hash_key_size = dev_info.hash_key_size;
> + } else {
> + printf("dev_info did not provide a valid hash key size\n");
> + return;
> + }
> +
> rss_conf.rss_hf = 0;
> for (i = 0; i < RTE_DIM(rss_type_table); i++) {
> if (!strcmp(rss_info, rss_type_table[i].str)) @@ -1028,7
> +1039,7 @@ port_rss_hash_conf_show(portid_t port_id, char
> rss_info[], int show_rss_key)
>
> /* Get RSS hash key if asked to display it */
> rss_conf.rss_key = (show_rss_key) ? rss_key : NULL;
> - rss_conf.rss_key_len = sizeof(rss_key);
> + rss_conf.rss_key_len = hash_key_size;
> diag = rte_eth_dev_rss_hash_conf_get(port_id, &rss_conf);
> if (diag != 0) {
> switch (diag) {
> @@ -1058,7 +1069,7 @@ port_rss_hash_conf_show(portid_t port_id, char
> rss_info[], int show_rss_key)
> if (!show_rss_key)
> return;
> printf("RSS key:\n");
> - for (i = 0; i < sizeof(rss_key); i++)
> + for (i = 0; i < hash_key_size; i++)
> printf("%02X", rss_key[i]);
> printf("\n");
> }
> --
> 2.7.4
