package/kernel/mac80211/patches/308-ath10k-cleanup-copy-engine-send-completion.patch

   1 From: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
   2 Date: Fri, 23 Oct 2015 18:01:05 +0530
   3 Subject: [PATCH] ath10k: cleanup copy engine send completion
   4
   5 The physical address necessary to unmap DMA ('bufferp') is stored
   6 in ath10k_skb_cb as 'paddr'. ath10k doesn't rely on the meta/transfer_id
   7 when handling send completion (htc ep id is stored in sk_buff control
   8 buffer). So the unused output arguments {bufferp, nbytesp and transfer_idp}
   9 are removed from CE send completion. This change is needed before removing
  10 the shadow copy of copy engine (CE) descriptors in follow up patch.
  11
  12 Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
  13 Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
  14 ---
  15
  16 --- a/drivers/net/wireless/ath/ath10k/ce.c
  17 +++ b/drivers/net/wireless/ath/ath10k/ce.c
  18 @@ -578,17 +578,13 @@ int ath10k_ce_revoke_recv_next(struct at
  19   * The caller takes responsibility for any necessary locking.
  20   */
  21  int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
  22 -                                        void **per_transfer_contextp,
  23 -                                        u32 *bufferp,
  24 -                                        unsigned int *nbytesp,
  25 -                                        unsigned int *transfer_idp)
  26 +                                        void **per_transfer_contextp)
  27  {
  28         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
  29         u32 ctrl_addr = ce_state->ctrl_addr;
  30         struct ath10k *ar = ce_state->ar;
  31         unsigned int nentries_mask = src_ring->nentries_mask;
  32         unsigned int sw_index = src_ring->sw_index;
  33 -       struct ce_desc *sdesc, *sbase;
  34         unsigned int read_index;
  35
  36         if (src_ring->hw_index == sw_index) {
  37 @@ -613,15 +609,6 @@ int ath10k_ce_completed_send_next_nolock
  38         if (read_index == sw_index)
  39                 return -EIO;
  40
  41 -       sbase = src_ring->base_addr_owner_space;
  42 -       sdesc = CE_SRC_RING_TO_DESC(sbase, sw_index);
  43 -
  44 -       /* Return data from completed source descriptor */
  45 -       *bufferp = __le32_to_cpu(sdesc->addr);
  46 -       *nbytesp = __le16_to_cpu(sdesc->nbytes);
  47 -       *transfer_idp = MS(__le16_to_cpu(sdesc->flags),
  48 -                          CE_DESC_FLAGS_META_DATA);
  49 -
  50         if (per_transfer_contextp)
  51                 *per_transfer_contextp =
  52                         src_ring->per_transfer_context[sw_index];
  53 @@ -696,10 +683,7 @@ int ath10k_ce_cancel_send_next(struct at
  54  }
  55
  56  int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
  57 -                                 void **per_transfer_contextp,
  58 -                                 u32 *bufferp,
  59 -                                 unsigned int *nbytesp,
  60 -                                 unsigned int *transfer_idp)
  61 +                                 void **per_transfer_contextp)
  62  {
  63         struct ath10k *ar = ce_state->ar;
  64         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
  65 @@ -707,9 +691,7 @@ int ath10k_ce_completed_send_next(struct
  66
  67         spin_lock_bh(&ar_pci->ce_lock);
  68         ret = ath10k_ce_completed_send_next_nolock(ce_state,
  69 -                                                  per_transfer_contextp,
  70 -                                                  bufferp, nbytesp,
  71 -                                                  transfer_idp);
  72 +                                                  per_transfer_contextp);
  73         spin_unlock_bh(&ar_pci->ce_lock);
  74
  75         return ret;
  76 --- a/drivers/net/wireless/ath/ath10k/ce.h
  77 +++ b/drivers/net/wireless/ath/ath10k/ce.h
  78 @@ -192,16 +192,10 @@ int ath10k_ce_completed_recv_next(struct
  79   * Pops 1 completed send buffer from Source ring.
  80   */
  81  int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
  82 -                                 void **per_transfer_contextp,
  83 -                                 u32 *bufferp,
  84 -                                 unsigned int *nbytesp,
  85 -                                 unsigned int *transfer_idp);
  86 +                                 void **per_transfer_contextp);
  87
  88  int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
  89 -                                        void **per_transfer_contextp,
  90 -                                        u32 *bufferp,
  91 -                                        unsigned int *nbytesp,
  92 -                                        unsigned int *transfer_idp);
  93 +                                        void **per_transfer_contextp);
  94
  95  /*==================CE Engine Initialization=======================*/
  96
  97 --- a/drivers/net/wireless/ath/ath10k/pci.c
  98 +++ b/drivers/net/wireless/ath/ath10k/pci.c
  99 @@ -910,9 +910,8 @@ static int ath10k_pci_diag_read_mem(stru
 100                         goto done;
 101
 102                 i = 0;
 103 -               while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
 104 -                                                           &completed_nbytes,
 105 -                                                           &id) != 0) {
 106 +               while (ath10k_ce_completed_send_next_nolock(ce_diag,
 107 +                                                           NULL) != 0) {
 108                         mdelay(1);
 109                         if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
 110                                 ret = -EBUSY;
 111 @@ -1073,9 +1072,8 @@ static int ath10k_pci_diag_write_mem(str
 112                         goto done;
 113
 114                 i = 0;
 115 -               while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
 116 -                                                           &completed_nbytes,
 117 -                                                           &id) != 0) {
 118 +               while (ath10k_ce_completed_send_next_nolock(ce_diag,
 119 +                                                           NULL) != 0) {
 120                         mdelay(1);
 121
 122                         if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
 123 @@ -1139,13 +1137,9 @@ static void ath10k_pci_htc_tx_cb(struct
 124         struct ath10k *ar = ce_state->ar;
 125         struct sk_buff_head list;
 126         struct sk_buff *skb;
 127 -       u32 ce_data;
 128 -       unsigned int nbytes;
 129 -       unsigned int transfer_id;
 130
 131         __skb_queue_head_init(&list);
 132 -       while (ath10k_ce_completed_send_next(ce_state, (void **)&skb, &ce_data,
 133 -                                            &nbytes, &transfer_id) == 0) {
 134 +       while (ath10k_ce_completed_send_next(ce_state, (void **)&skb) == 0) {
 135                 /* no need to call tx completion for NULL pointers */
 136                 if (skb == NULL)
 137                         continue;
 138 @@ -1215,12 +1209,8 @@ static void ath10k_pci_htt_tx_cb(struct
 139  {
 140         struct ath10k *ar = ce_state->ar;
 141         struct sk_buff *skb;
 142 -       u32 ce_data;
 143 -       unsigned int nbytes;
 144 -       unsigned int transfer_id;
 145
 146 -       while (ath10k_ce_completed_send_next(ce_state, (void **)&skb, &ce_data,
 147 -                                            &nbytes, &transfer_id) == 0) {
 148 +       while (ath10k_ce_completed_send_next(ce_state, (void **)&skb) == 0) {
 149                 /* no need to call tx completion for NULL pointers */
 150                 if (!skb)
 151                         continue;
 152 @@ -1796,12 +1786,8 @@ err_dma:
 153  static void ath10k_pci_bmi_send_done(struct ath10k_ce_pipe *ce_state)
 154  {
 155         struct bmi_xfer *xfer;
 156 -       u32 ce_data;
 157 -       unsigned int nbytes;
 158 -       unsigned int transfer_id;
 159
 160 -       if (ath10k_ce_completed_send_next(ce_state, (void **)&xfer, &ce_data,
 161 -                                         &nbytes, &transfer_id))
 162 +       if (ath10k_ce_completed_send_next(ce_state, (void **)&xfer))
 163                 return;
 164
 165         xfer->tx_done = true;