ath10k: change ce ring cleanup logic

Make ath10k_pci_init_pipes() effectively only
alter shared target-host data.

The per_transfer_context is a host-only thing.
It is necessary to preserve it's contents for a
more robust ring cleanup.

This is required for future warm reset fixes.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index 9b89ac1..878e1ec 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -835,9 +835,6 @@ static int ath10k_ce_init_src_ring(struct ath10k *ar,
 
        nentries = roundup_pow_of_two(attr->src_nentries);
 
-       memset(src_ring->per_transfer_context, 0,
-              nentries * sizeof(*src_ring->per_transfer_context));
-
        src_ring->sw_index = ath10k_ce_src_ring_read_index_get(ar, ctrl_addr);
        src_ring->sw_index &= src_ring->nentries_mask;
        src_ring->hw_index = src_ring->sw_index;
@@ -872,9 +869,6 @@ static int ath10k_ce_init_dest_ring(struct ath10k *ar,
 
        nentries = roundup_pow_of_two(attr->dest_nentries);
 
-       memset(dest_ring->per_transfer_context, 0,
-              nentries * sizeof(*dest_ring->per_transfer_context));
-
        dest_ring->sw_index = ath10k_ce_dest_ring_read_index_get(ar, ctrl_addr);
        dest_ring->sw_index &= dest_ring->nentries_mask;
        dest_ring->write_index =

diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 4a4740b..a8a3e1b 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -1196,64 +1196,74 @@ static int ath10k_pci_hif_start(struct ath10k *ar)
        return 0;
 }
 
-static void ath10k_pci_rx_pipe_cleanup(struct ath10k_pci_pipe *pipe_info)
+static void ath10k_pci_rx_pipe_cleanup(struct ath10k_pci_pipe *pci_pipe)
 {
        struct ath10k *ar;
-       struct ath10k_pci *ar_pci;
-       struct ath10k_ce_pipe *ce_hdl;
-       u32 buf_sz;
-       struct sk_buff *netbuf;
-       u32 ce_data;
+       struct ath10k_ce_pipe *ce_pipe;
+       struct ath10k_ce_ring *ce_ring;
+       struct sk_buff *skb;
+       int i;
 
-       buf_sz = pipe_info->buf_sz;
+       ar = pci_pipe->hif_ce_state;
+       ce_pipe = pci_pipe->ce_hdl;
+       ce_ring = ce_pipe->dest_ring;
 
-       /* Unused Copy Engine */
-       if (buf_sz == 0)
+       if (!ce_ring)
                return;
 
-       ar = pipe_info->hif_ce_state;
-       ar_pci = ath10k_pci_priv(ar);
-       ce_hdl = pipe_info->ce_hdl;
+       if (!pci_pipe->buf_sz)
+               return;
 
-       while (ath10k_ce_revoke_recv_next(ce_hdl, (void **)&netbuf,
-                                         &ce_data) == 0) {
-               dma_unmap_single(ar->dev, ATH10K_SKB_CB(netbuf)->paddr,
-                                netbuf->len + skb_tailroom(netbuf),
+       for (i = 0; i < ce_ring->nentries; i++) {
+               skb = ce_ring->per_transfer_context[i];
+               if (!skb)
+                       continue;
+
+               ce_ring->per_transfer_context[i] = NULL;
+
+               dma_unmap_single(ar->dev, ATH10K_SKB_CB(skb)->paddr,
+                                skb->len + skb_tailroom(skb),
                                 DMA_FROM_DEVICE);
-               dev_kfree_skb_any(netbuf);
+               dev_kfree_skb_any(skb);
        }
 }
 
-static void ath10k_pci_tx_pipe_cleanup(struct ath10k_pci_pipe *pipe_info)
+static void ath10k_pci_tx_pipe_cleanup(struct ath10k_pci_pipe *pci_pipe)
 {
        struct ath10k *ar;
        struct ath10k_pci *ar_pci;
-       struct ath10k_ce_pipe *ce_hdl;
-       struct sk_buff *netbuf;
-       u32 ce_data;
-       unsigned int nbytes;
+       struct ath10k_ce_pipe *ce_pipe;
+       struct ath10k_ce_ring *ce_ring;
+       struct ce_desc *ce_desc;
+       struct sk_buff *skb;
        unsigned int id;
-       u32 buf_sz;
+       int i;
 
-       buf_sz = pipe_info->buf_sz;
+       ar = pci_pipe->hif_ce_state;
+       ar_pci = ath10k_pci_priv(ar);
+       ce_pipe = pci_pipe->ce_hdl;
+       ce_ring = ce_pipe->src_ring;
 
-       /* Unused Copy Engine */
-       if (buf_sz == 0)
+       if (!ce_ring)
                return;
 
-       ar = pipe_info->hif_ce_state;
-       ar_pci = ath10k_pci_priv(ar);
-       ce_hdl = pipe_info->ce_hdl;
+       if (!pci_pipe->buf_sz)
+               return;
 
-       while (ath10k_ce_cancel_send_next(ce_hdl, (void **)&netbuf,
-                                         &ce_data, &nbytes, &id) == 0) {
-               /* no need to call tx completion for NULL pointers */
-               if (!netbuf)
+       ce_desc = ce_ring->shadow_base;
+       if (WARN_ON(!ce_desc))
+               return;
+
+       for (i = 0; i < ce_ring->nentries; i++) {
+               skb = ce_ring->per_transfer_context[i];
+               if (!skb)
                        continue;
 
-               ar_pci->msg_callbacks_current.tx_completion(ar,
-                                                           netbuf,
-                                                           id);
+               ce_ring->per_transfer_context[i] = NULL;
+               id = MS(__le16_to_cpu(ce_desc[i].flags),
+                       CE_DESC_FLAGS_META_DATA);
+
+               ar_pci->msg_callbacks_current.tx_completion(ar, skb, id);
        }
 }