package/kernel/mac80211/patches/brcm/328-v5.0-0001-brcmfmac-add-credit-numbers-updating-support.patch

   1 From 153e22c0ff1260035cd7fe72c8aeead1f5fac757 Mon Sep 17 00:00:00 2001
   2 From: Wright Feng <Wright.Feng@cypress.com>
   3 Date: Mon, 5 Nov 2018 05:51:54 +0000
   4 Subject: [PATCH] brcmfmac: add credit numbers updating support
   5
   6 The credit numbers are static and tunable per chip in firmware side.
   7 However the credit number may be changed that is based on packet pool
   8 length and will send BRCMF_E_FIFO_CREDIT_MAP event to notify host driver
   9 updates the credit numbers during interface up.
  10 The purpose of this patch is making host driver has ability of updating
  11 the credit numbers when receiving the BRCMF_E_FIFO_CREDIT_MAP event.
  12
  13 Signed-off-by: Wright Feng <wright.feng@cypress.com>
  14 Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  15 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  16 ---
  17  .../broadcom/brcm80211/brcmfmac/fwsignal.c    | 23 ++++++++++++-------
  18  1 file changed, 15 insertions(+), 8 deletions(-)
  19
  20 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
  21 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
  22 @@ -511,6 +511,7 @@ struct brcmf_fws_info {
  23         struct work_struct fws_dequeue_work;
  24         u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
  25         int fifo_credit[BRCMF_FWS_FIFO_COUNT];
  26 +       int init_fifo_credit[BRCMF_FWS_FIFO_COUNT];
  27         int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
  28         int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
  29         u32 fifo_credit_map;
  30 @@ -1237,6 +1238,9 @@ static void brcmf_fws_return_credits(str
  31         }
  32
  33         fws->fifo_credit[fifo] += credits;
  34 +       if (fws->fifo_credit[fifo] > fws->init_fifo_credit[fifo])
  35 +               fws->fifo_credit[fifo] = fws->init_fifo_credit[fifo];
  36 +
  37  }
  38
  39  static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
  40 @@ -1595,19 +1599,21 @@ static int brcmf_fws_notify_credit_map(s
  41                 brcmf_err("event payload too small (%d)\n", e->datalen);
  42                 return -EINVAL;
  43         }
  44 -       if (fws->creditmap_received)
  45 -               return 0;
  46
  47         fws->creditmap_received = true;
  48
  49         brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
  50         brcmf_fws_lock(fws);
  51         for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
  52 -               if (*credits)
  53 +               fws->fifo_credit[i] += credits[i] - fws->init_fifo_credit[i];
  54 +               fws->init_fifo_credit[i] = credits[i];
  55 +               if (fws->fifo_credit[i] > 0)
  56                         fws->fifo_credit_map |= 1 << i;
  57                 else
  58                         fws->fifo_credit_map &= ~(1 << i);
  59 -               fws->fifo_credit[i] = *credits++;
  60 +               WARN_ONCE(fws->fifo_credit[i] < 0,
  61 +                         "fifo_credit[%d] is negative(%d)\n", i,
  62 +                         fws->fifo_credit[i]);
  63         }
  64         brcmf_fws_schedule_deq(fws);
  65         brcmf_fws_unlock(fws);
  66 @@ -2013,7 +2019,7 @@ static int brcmf_fws_borrow_credit(struc
  67         }
  68
  69         for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
  70 -               if (fws->fifo_credit[lender_ac]) {
  71 +               if (fws->fifo_credit[lender_ac] > 0) {
  72                         fws->credits_borrowed[lender_ac]++;
  73                         fws->fifo_credit[lender_ac]--;
  74                         if (fws->fifo_credit[lender_ac] == 0)
  75 @@ -2210,8 +2216,9 @@ static void brcmf_fws_dequeue_worker(str
  76                         }
  77                         continue;
  78                 }
  79 -               while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
  80 -                      (fifo == BRCMF_FWS_FIFO_BCMC))) {
  81 +               while ((fws->fifo_credit[fifo] > 0) ||
  82 +                      ((!fws->bcmc_credit_check) &&
  83 +                       (fifo == BRCMF_FWS_FIFO_BCMC))) {
  84                         skb = brcmf_fws_deq(fws, fifo);
  85                         if (!skb)
  86                                 break;
  87 @@ -2222,7 +2229,7 @@ static void brcmf_fws_dequeue_worker(str
  88                                 break;
  89                 }
  90                 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
  91 -                   (fws->fifo_credit[fifo] == 0) &&
  92 +                   (fws->fifo_credit[fifo] <= 0) &&
  93                     (!fws->bus_flow_blocked)) {
  94                         while (brcmf_fws_borrow_credit(fws) == 0) {
  95                                 skb = brcmf_fws_deq(fws, fifo);