package/kernel/mac80211/patches/314-brcmfmac-add-debugfs-entry-for-msgbuf-statistics.patch

   1 From: Franky Lin <frankyl@broadcom.com>
   2 Date: Thu, 20 Aug 2015 22:06:04 +0200
   3 Subject: [PATCH] brcmfmac: add debugfs entry for msgbuf statistics
   4
   5 Expose ring buffer read/write pointers and other useful statistics
   6 through debugfs.
   7
   8 Reviewed-by: Arend Van Spriel <arend@broadcom.com>
   9 Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
  10 Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
  11 Signed-off-by: Franky Lin <frankyl@broadcom.com>
  12 Signed-off-by: Arend van Spriel <arend@broadcom.com>
  13 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  14 ---
  15
  16 --- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
  17 +++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
  18 @@ -1360,6 +1360,60 @@ void brcmf_msgbuf_delete_flowring(struct
  19         }
  20  }
  21
  22 +#ifdef DEBUG
  23 +static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
  24 +{
  25 +       struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  26 +       struct brcmf_pub *drvr = bus_if->drvr;
  27 +       struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
  28 +       struct brcmf_commonring *commonring;
  29 +       u16 i;
  30 +       struct brcmf_flowring_ring *ring;
  31 +       struct brcmf_flowring_hash *hash;
  32 +
  33 +       commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
  34 +       seq_printf(seq, "h2d_ctl_submit: rp %4u, wp %4u, depth %4u\n",
  35 +                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
  36 +       commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
  37 +       seq_printf(seq, "h2d_rx_submit:  rp %4u, wp %4u, depth %4u\n",
  38 +                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
  39 +       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
  40 +       seq_printf(seq, "d2h_ctl_cmplt:  rp %4u, wp %4u, depth %4u\n",
  41 +                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
  42 +       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
  43 +       seq_printf(seq, "d2h_tx_cmplt:   rp %4u, wp %4u, depth %4u\n",
  44 +                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
  45 +       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
  46 +       seq_printf(seq, "d2h_rx_cmplt:   rp %4u, wp %4u, depth %4u\n",
  47 +                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
  48 +
  49 +       seq_printf(seq, "\nh2d_flowrings: depth %u\n",
  50 +                  BRCMF_H2D_TXFLOWRING_MAX_ITEM);
  51 +       seq_puts(seq, "Active flowrings:\n");
  52 +       hash = msgbuf->flow->hash;
  53 +       for (i = 0; i < msgbuf->flow->nrofrings; i++) {
  54 +               if (!msgbuf->flow->rings[i])
  55 +                       continue;
  56 +               ring = msgbuf->flow->rings[i];
  57 +               if (ring->status != RING_OPEN)
  58 +                       continue;
  59 +               commonring = msgbuf->flowrings[i];
  60 +               hash = &msgbuf->flow->hash[ring->hash_id];
  61 +               seq_printf(seq, "id %3u: rp %4u, wp %4u, qlen %4u, blocked %u\n"
  62 +                               "        ifidx %u, fifo %u, da %pM\n",
  63 +                               i, commonring->r_ptr, commonring->w_ptr,
  64 +                               skb_queue_len(&ring->skblist), ring->blocked,
  65 +                               hash->ifidx, hash->fifo, hash->mac);
  66 +       }
  67 +
  68 +       return 0;
  69 +}
  70 +#else
  71 +static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
  72 +{
  73 +       return 0;
  74 +}
  75 +#endif
  76
  77  int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
  78  {
  79 @@ -1460,6 +1514,8 @@ int brcmf_proto_msgbuf_attach(struct brc
  80         spin_lock_init(&msgbuf->flowring_work_lock);
  81         INIT_LIST_HEAD(&msgbuf->work_queue);
  82
  83 +       brcmf_debugfs_add_entry(drvr, "msgbuf_stats", brcmf_msgbuf_stats_read);
  84 +
  85         return 0;
  86
  87  fail: