Esempi in C++ (Cpp) per ath10k_htc_prepare_tx_skb

Esempio n. 1

File: htc.c Progetto: acton393/linux

int ath10k_htc_send(struct ath10k_htc *htc,
		    enum ath10k_htc_ep_id eid,
		    struct sk_buff *skb)
{
	struct ath10k *ar = htc->ar;
	struct ath10k_htc_ep *ep = &htc->endpoint[eid];
	struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
	struct ath10k_hif_sg_item sg_item;
	struct device *dev = htc->ar->dev;
	int credits = 0;
	int ret;

	if (htc->ar->state == ATH10K_STATE_WEDGED)
		return -ECOMM;

	if (eid >= ATH10K_HTC_EP_COUNT) {
		ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
		return -ENOENT;
	}

	skb_push(skb, sizeof(struct ath10k_htc_hdr));

	if (ep->tx_credit_flow_enabled) {
		credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
		spin_lock_bh(&htc->tx_lock);
		if (ep->tx_credits < credits) {
			spin_unlock_bh(&htc->tx_lock);
			ret = -EAGAIN;
			goto err_pull;
		}
		ep->tx_credits -= credits;
		ath10k_dbg(ar, ATH10K_DBG_HTC,
			   "htc ep %d consumed %d credits (total %d)\n",
			   eid, credits, ep->tx_credits);
		spin_unlock_bh(&htc->tx_lock);
	}

	ath10k_htc_prepare_tx_skb(ep, skb);

	skb_cb->eid = eid;
	skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
	ret = dma_mapping_error(dev, skb_cb->paddr);
	if (ret) {
		ret = -EIO;
		goto err_credits;
	}

	sg_item.transfer_id = ep->eid;
	sg_item.transfer_context = skb;
	sg_item.vaddr = skb->data;
	sg_item.paddr = skb_cb->paddr;
	sg_item.len = skb->len;

	ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
	if (ret)
		goto err_unmap;

	return 0;

err_unmap:
	dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
err_credits:
	if (ep->tx_credit_flow_enabled) {
		spin_lock_bh(&htc->tx_lock);
		ep->tx_credits += credits;
		ath10k_dbg(ar, ATH10K_DBG_HTC,
			   "htc ep %d reverted %d credits back (total %d)\n",
			   eid, credits, ep->tx_credits);
		spin_unlock_bh(&htc->tx_lock);

		if (ep->ep_ops.ep_tx_credits)
			ep->ep_ops.ep_tx_credits(htc->ar);
	}
err_pull:
	skb_pull(skb, sizeof(struct ath10k_htc_hdr));
	return ret;
}

Esempio n. 2

File: htc.c Progetto: AnadoluPanteri/kernel-plus-harmattan

int ath10k_htc_send(struct ath10k_htc *htc,
		    enum ath10k_htc_ep_id eid,
		    struct sk_buff *skb)
{
	struct ath10k_htc_ep *ep = &htc->endpoint[eid];
	int credits = 0;
	int ret;

	if (htc->ar->state == ATH10K_STATE_WEDGED)
		return -ECOMM;

	if (eid >= ATH10K_HTC_EP_COUNT) {
		ath10k_warn("Invalid endpoint id: %d\n", eid);
		return -ENOENT;
	}

	/* FIXME: This looks ugly, can we fix it? */
	spin_lock_bh(&htc->tx_lock);
	if (htc->stopped) {
		spin_unlock_bh(&htc->tx_lock);
		return -ESHUTDOWN;
	}
	spin_unlock_bh(&htc->tx_lock);

	skb_push(skb, sizeof(struct ath10k_htc_hdr));

	if (ep->tx_credit_flow_enabled) {
		credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
		spin_lock_bh(&htc->tx_lock);
		if (ep->tx_credits < credits) {
			spin_unlock_bh(&htc->tx_lock);
			ret = -EAGAIN;
			goto err_pull;
		}
		ep->tx_credits -= credits;
		spin_unlock_bh(&htc->tx_lock);
	}

	ath10k_htc_prepare_tx_skb(ep, skb);

	ret = ath10k_skb_map(htc->ar->dev, skb);
	if (ret)
		goto err_credits;

	ret = ath10k_hif_send_head(htc->ar, ep->ul_pipe_id, ep->eid,
				   skb->len, skb);
	if (ret)
		goto err_unmap;

	return 0;

err_unmap:
	ath10k_skb_unmap(htc->ar->dev, skb);
err_credits:
	if (ep->tx_credit_flow_enabled) {
		spin_lock_bh(&htc->tx_lock);
		ep->tx_credits += credits;
		spin_unlock_bh(&htc->tx_lock);

		if (ep->ep_ops.ep_tx_credits)
			ep->ep_ops.ep_tx_credits(htc->ar);
	}
err_pull:
	skb_pull(skb, sizeof(struct ath10k_htc_hdr));
	return ret;
}