package/kernel/mac80211/patches/385-brcmfmac-Update-msgbuf-read-pointer-quicker.patch

   1 From: Hante Meuleman <meuleman@broadcom.com>
   2 Date: Mon, 8 Jun 2015 14:38:32 +0200
   3 Subject: [PATCH] brcmfmac: Update msgbuf read pointer quicker.
   4
   5 On device to host data using msgbuf the read pointer gets updated
   6 once all data is processed. Updating this pointer more frequently
   7 allows the firmware to add more data quicker. This will result in
   8 slightly higher and more stable throughput on CPU bounded host
   9 processors.
  10
  11 Reviewed-by: Arend Van Spriel <arend@broadcom.com>
  12 Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
  13 Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
  14 Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
  15 Signed-off-by: Arend van Spriel <arend@broadcom.com>
  16 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  17 ---
  18
  19 --- a/drivers/net/wireless/brcm80211/brcmfmac/commonring.c
  20 +++ b/drivers/net/wireless/brcm80211/brcmfmac/commonring.c
  21 @@ -223,8 +223,6 @@ void brcmf_commonring_write_cancel(struc
  22  void *brcmf_commonring_get_read_ptr(struct brcmf_commonring *commonring,
  23                                     u16 *n_items)
  24  {
  25 -       void *ret_addr;
  26 -
  27         if (commonring->cr_update_wptr)
  28                 commonring->cr_update_wptr(commonring->cr_ctx);
  29
  30 @@ -235,19 +233,18 @@ void *brcmf_commonring_get_read_ptr(stru
  31         if (*n_items == 0)
  32                 return NULL;
  33
  34 -       ret_addr = commonring->buf_addr +
  35 -                  (commonring->r_ptr * commonring->item_len);
  36 -
  37 -       commonring->r_ptr += *n_items;
  38 -       if (commonring->r_ptr == commonring->depth)
  39 -               commonring->r_ptr = 0;
  40 -
  41 -       return ret_addr;
  42 +       return commonring->buf_addr +
  43 +              (commonring->r_ptr * commonring->item_len);
  44  }
  45
  46
  47 -int brcmf_commonring_read_complete(struct brcmf_commonring *commonring)
  48 +int brcmf_commonring_read_complete(struct brcmf_commonring *commonring,
  49 +                                  u16 n_items)
  50  {
  51 +       commonring->r_ptr += n_items;
  52 +       if (commonring->r_ptr == commonring->depth)
  53 +               commonring->r_ptr = 0;
  54 +
  55         if (commonring->cr_write_rptr)
  56                 return commonring->cr_write_rptr(commonring->cr_ctx);
  57
  58 --- a/drivers/net/wireless/brcm80211/brcmfmac/commonring.h
  59 +++ b/drivers/net/wireless/brcm80211/brcmfmac/commonring.h
  60 @@ -62,7 +62,8 @@ void brcmf_commonring_write_cancel(struc
  61                                    u16 n_items);
  62  void *brcmf_commonring_get_read_ptr(struct brcmf_commonring *commonring,
  63                                     u16 *n_items);
  64 -int brcmf_commonring_read_complete(struct brcmf_commonring *commonring);
  65 +int brcmf_commonring_read_complete(struct brcmf_commonring *commonring,
  66 +                                  u16 n_items);
  67
  68  #define brcmf_commonring_n_items(commonring) (commonring->depth)
  69  #define brcmf_commonring_len_item(commonring) (commonring->item_len)
  70 --- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
  71 +++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
  72 @@ -75,6 +75,8 @@
  73
  74  #define BRCMF_MSGBUF_DELAY_TXWORKER_THRS       96
  75  #define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS     32
  76 +#define BRCMF_MSGBUF_UPDATE_RX_PTR_THRS                48
  77 +
  78
  79  struct msgbuf_common_hdr {
  80         u8                              msgtype;
  81 @@ -1257,19 +1259,27 @@ static void brcmf_msgbuf_process_rx(stru
  82  {
  83         void *buf;
  84         u16 count;
  85 +       u16 processed;
  86
  87  again:
  88         buf = brcmf_commonring_get_read_ptr(commonring, &count);
  89         if (buf == NULL)
  90                 return;
  91
  92 +       processed = 0;
  93         while (count) {
  94                 brcmf_msgbuf_process_msgtype(msgbuf,
  95                                              buf + msgbuf->rx_dataoffset);
  96                 buf += brcmf_commonring_len_item(commonring);
  97 +               processed++;
  98 +               if (processed == BRCMF_MSGBUF_UPDATE_RX_PTR_THRS) {
  99 +                       brcmf_commonring_read_complete(commonring, processed);
 100 +                       processed = 0;
 101 +               }
 102                 count--;
 103         }
 104 -       brcmf_commonring_read_complete(commonring);
 105 +       if (processed)
 106 +               brcmf_commonring_read_complete(commonring, processed);
 107
 108         if (commonring->r_ptr == 0)
 109                 goto again;