On 2014-09-29 15:58, Karl Beldan wrote:
> You mean having a common hardcoded value for both ?
Yes. And at the same time also getting rid of #if tests for it.
> After 4441e8e9 the minstrel rate indexes have to be u8-s and having this
> common param > 2 would require something like:
>
> {{{
> diff --git a/net/mac80211/rc80211_minstrel_ht.c
> b/net/mac80211/rc80211_minstrel_ht.c
> index 41522c7..c3d9136 100644
> --- a/net/mac80211/rc80211_minstrel_ht.c
> +++ b/net/mac80211/rc80211_minstrel_ht.c
> @@ -346,8 +364,8 @@ minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int
> group, int rate)
> * MCS groups, CCK rates do not provide aggregation and are therefore at
> last.
> */
> static void
> -minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u8 index,
> - u8 *tp_list)
> +minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u16 index,
> + u16 *tp_list)
> {
> int cur_group, cur_idx, cur_thr, cur_prob;
> int tmp_group, tmp_idx, tmp_thr, tmp_prob;
> @@ -384,7 +402,7 @@ minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta
> *mi, u8 index,
> * Find and set the topmost probability rate per sta and per group
> */
> static void
> -minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u8 index)
> +minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
> {
> struct minstrel_mcs_group_data *mg;
> struct minstrel_rate_stats *mr;
> @@ -427,8 +445,8 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta
> *mi, u8 index)
> */
> static void
> minstrel_ht_assign_best_tp_rates(struct minstrel_ht_sta *mi,
> - u8 tmp_mcs_tp_rate[MAX_THR_RATES],
> - u8 tmp_cck_tp_rate[MAX_THR_RATES])
> + u16 tmp_mcs_tp_rate[MAX_THR_RATES],
> + u16 tmp_cck_tp_rate[MAX_THR_RATES])
> {
> unsigned int tmp_group, tmp_idx, tmp_cck_tp, tmp_mcs_tp;
> int i;
> @@ -492,8 +510,8 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct
> minstrel_ht_sta *mi)
> struct minstrel_mcs_group_data *mg;
> struct minstrel_rate_stats *mr;
> int group, i, j;
> - u8 tmp_mcs_tp_rate[MAX_THR_RATES], tmp_group_tp_rate[MAX_THR_RATES];
> - u8 tmp_cck_tp_rate[MAX_THR_RATES], index;
> + u16 tmp_mcs_tp_rate[MAX_THR_RATES], tmp_group_tp_rate[MAX_THR_RATES];
> + u16 tmp_cck_tp_rate[MAX_THR_RATES], index;
>
> if (mi->ampdu_packets > 0) {
> mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
> diff --git a/net/mac80211/rc80211_minstrel_ht.h
> b/net/mac80211/rc80211_minstrel_ht.h
> index 7856062..354e076 100644
> --- a/net/mac80211/rc80211_minstrel_ht.h
> +++ b/net/mac80211/rc80211_minstrel_ht.h
> @@ -57,8 +57,8 @@ struct minstrel_mcs_group_data {
> u16 supported;
>
> /* sorted rate set within a MCS group*/
> - u8 max_group_tp_rate[MAX_THR_RATES];
> - u8 max_group_prob_rate;
> + u16 max_group_tp_rate[MAX_THR_RATES];
> + u16 max_group_prob_rate;
>
> /* MCS rate statistics */
> struct minstrel_rate_stats rates[MCS_GROUP_RATES];
> @@ -75,8 +75,8 @@ struct minstrel_ht_sta {
> unsigned int avg_ampdu_len;
>
> /* overall sorted rate set */
> - u8 max_tp_rate[MAX_THR_RATES];
> - u8 max_prob_rate;
> + u16 max_tp_rate[MAX_THR_RATES];
> + u16 max_prob_rate;
>
> /* time of last status update */
> unsigned long stats_update;
> }}}
>
> With this I could not advertise the patch overhead-less when not setting
> MAC80211_RC_MINSTREL_VHT, too invasive for a simple step to feel the
> limits of the present implementation and a way to test vht tx path.
>
> But maybe that's not what you had in mind for MINSTREL_*_MAX_STREAMS ?
I think the overhead of this is insignificant enough to justify getting
rid of some #if spaghetti. It should probably be posted as a separate
patch though, to simplify review.
- Felix
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