forked from Minki/linux
5e55e3cbd1
The function returns 1 when DMA mapping fails. The
driver would return bogus values and could
possibly confuse itself if DMA failed.
Fixes: 767d34fc67
("ath10k: remove DMA mapping wrappers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
867 lines
22 KiB
C
867 lines
22 KiB
C
/*
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* Copyright (c) 2005-2011 Atheros Communications Inc.
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* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "core.h"
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#include "hif.h"
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#include "debug.h"
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/********/
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/* Send */
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/********/
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static inline void ath10k_htc_send_complete_check(struct ath10k_htc_ep *ep,
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int force)
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{
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/*
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* Check whether HIF has any prior sends that have finished,
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* have not had the post-processing done.
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*/
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ath10k_hif_send_complete_check(ep->htc->ar, ep->ul_pipe_id, force);
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}
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static void ath10k_htc_control_tx_complete(struct ath10k *ar,
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struct sk_buff *skb)
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{
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kfree_skb(skb);
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}
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static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
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{
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struct sk_buff *skb;
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struct ath10k_skb_cb *skb_cb;
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skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
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if (!skb)
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return NULL;
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skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
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WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
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skb_cb = ATH10K_SKB_CB(skb);
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memset(skb_cb, 0, sizeof(*skb_cb));
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ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %p\n", __func__, skb);
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return skb;
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}
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static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
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struct sk_buff *skb)
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{
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struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
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dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
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skb_pull(skb, sizeof(struct ath10k_htc_hdr));
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}
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static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
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struct sk_buff *skb)
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{
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struct ath10k *ar = ep->htc->ar;
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ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__,
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ep->eid, skb);
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ath10k_htc_restore_tx_skb(ep->htc, skb);
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if (!ep->ep_ops.ep_tx_complete) {
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ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
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dev_kfree_skb_any(skb);
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return;
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}
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ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
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}
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static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
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struct sk_buff *skb)
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{
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struct ath10k_htc_hdr *hdr;
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hdr = (struct ath10k_htc_hdr *)skb->data;
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hdr->eid = ep->eid;
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hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
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hdr->flags = 0;
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hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
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spin_lock_bh(&ep->htc->tx_lock);
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hdr->seq_no = ep->seq_no++;
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spin_unlock_bh(&ep->htc->tx_lock);
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}
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int ath10k_htc_send(struct ath10k_htc *htc,
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enum ath10k_htc_ep_id eid,
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struct sk_buff *skb)
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{
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struct ath10k *ar = htc->ar;
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struct ath10k_htc_ep *ep = &htc->endpoint[eid];
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struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
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struct ath10k_hif_sg_item sg_item;
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struct device *dev = htc->ar->dev;
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int credits = 0;
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int ret;
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if (htc->ar->state == ATH10K_STATE_WEDGED)
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return -ECOMM;
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if (eid >= ATH10K_HTC_EP_COUNT) {
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ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
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return -ENOENT;
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}
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skb_push(skb, sizeof(struct ath10k_htc_hdr));
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if (ep->tx_credit_flow_enabled) {
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credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
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spin_lock_bh(&htc->tx_lock);
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if (ep->tx_credits < credits) {
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spin_unlock_bh(&htc->tx_lock);
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ret = -EAGAIN;
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goto err_pull;
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}
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ep->tx_credits -= credits;
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ath10k_dbg(ar, ATH10K_DBG_HTC,
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"htc ep %d consumed %d credits (total %d)\n",
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eid, credits, ep->tx_credits);
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spin_unlock_bh(&htc->tx_lock);
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}
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ath10k_htc_prepare_tx_skb(ep, skb);
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skb_cb->eid = eid;
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skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
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ret = dma_mapping_error(dev, skb_cb->paddr);
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if (ret) {
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ret = -EIO;
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goto err_credits;
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}
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sg_item.transfer_id = ep->eid;
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sg_item.transfer_context = skb;
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sg_item.vaddr = skb->data;
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sg_item.paddr = skb_cb->paddr;
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sg_item.len = skb->len;
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ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
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if (ret)
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goto err_unmap;
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return 0;
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err_unmap:
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dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
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err_credits:
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if (ep->tx_credit_flow_enabled) {
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spin_lock_bh(&htc->tx_lock);
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ep->tx_credits += credits;
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ath10k_dbg(ar, ATH10K_DBG_HTC,
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"htc ep %d reverted %d credits back (total %d)\n",
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eid, credits, ep->tx_credits);
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spin_unlock_bh(&htc->tx_lock);
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if (ep->ep_ops.ep_tx_credits)
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ep->ep_ops.ep_tx_credits(htc->ar);
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}
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err_pull:
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skb_pull(skb, sizeof(struct ath10k_htc_hdr));
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return ret;
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}
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static int ath10k_htc_tx_completion_handler(struct ath10k *ar,
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struct sk_buff *skb)
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{
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struct ath10k_htc *htc = &ar->htc;
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struct ath10k_skb_cb *skb_cb;
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struct ath10k_htc_ep *ep;
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if (WARN_ON_ONCE(!skb))
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return 0;
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skb_cb = ATH10K_SKB_CB(skb);
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ep = &htc->endpoint[skb_cb->eid];
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ath10k_htc_notify_tx_completion(ep, skb);
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/* the skb now belongs to the completion handler */
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return 0;
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}
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/***********/
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/* Receive */
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/***********/
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static void
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ath10k_htc_process_credit_report(struct ath10k_htc *htc,
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const struct ath10k_htc_credit_report *report,
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int len,
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enum ath10k_htc_ep_id eid)
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{
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struct ath10k *ar = htc->ar;
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struct ath10k_htc_ep *ep;
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int i, n_reports;
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if (len % sizeof(*report))
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ath10k_warn(ar, "Uneven credit report len %d", len);
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n_reports = len / sizeof(*report);
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spin_lock_bh(&htc->tx_lock);
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for (i = 0; i < n_reports; i++, report++) {
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if (report->eid >= ATH10K_HTC_EP_COUNT)
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break;
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ep = &htc->endpoint[report->eid];
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ep->tx_credits += report->credits;
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ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
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report->eid, report->credits, ep->tx_credits);
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if (ep->ep_ops.ep_tx_credits) {
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spin_unlock_bh(&htc->tx_lock);
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ep->ep_ops.ep_tx_credits(htc->ar);
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spin_lock_bh(&htc->tx_lock);
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}
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}
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spin_unlock_bh(&htc->tx_lock);
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}
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static int ath10k_htc_process_trailer(struct ath10k_htc *htc,
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u8 *buffer,
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int length,
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enum ath10k_htc_ep_id src_eid)
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{
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struct ath10k *ar = htc->ar;
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int status = 0;
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struct ath10k_htc_record *record;
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u8 *orig_buffer;
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int orig_length;
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size_t len;
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orig_buffer = buffer;
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orig_length = length;
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while (length > 0) {
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record = (struct ath10k_htc_record *)buffer;
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if (length < sizeof(record->hdr)) {
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status = -EINVAL;
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break;
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}
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if (record->hdr.len > length) {
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/* no room left in buffer for record */
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ath10k_warn(ar, "Invalid record length: %d\n",
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record->hdr.len);
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status = -EINVAL;
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break;
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}
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switch (record->hdr.id) {
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case ATH10K_HTC_RECORD_CREDITS:
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len = sizeof(struct ath10k_htc_credit_report);
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if (record->hdr.len < len) {
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ath10k_warn(ar, "Credit report too long\n");
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status = -EINVAL;
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break;
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}
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ath10k_htc_process_credit_report(htc,
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record->credit_report,
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record->hdr.len,
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src_eid);
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break;
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default:
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ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
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record->hdr.id, record->hdr.len);
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break;
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}
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if (status)
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break;
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/* multiple records may be present in a trailer */
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buffer += sizeof(record->hdr) + record->hdr.len;
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length -= sizeof(record->hdr) + record->hdr.len;
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}
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if (status)
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ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
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orig_buffer, orig_length);
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return status;
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}
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static int ath10k_htc_rx_completion_handler(struct ath10k *ar,
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struct sk_buff *skb)
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{
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int status = 0;
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struct ath10k_htc *htc = &ar->htc;
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struct ath10k_htc_hdr *hdr;
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struct ath10k_htc_ep *ep;
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u16 payload_len;
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u32 trailer_len = 0;
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size_t min_len;
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u8 eid;
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bool trailer_present;
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hdr = (struct ath10k_htc_hdr *)skb->data;
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skb_pull(skb, sizeof(*hdr));
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eid = hdr->eid;
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if (eid >= ATH10K_HTC_EP_COUNT) {
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ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
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ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
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hdr, sizeof(*hdr));
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status = -EINVAL;
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goto out;
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}
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ep = &htc->endpoint[eid];
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|
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/*
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* If this endpoint that received a message from the target has
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* a to-target HIF pipe whose send completions are polled rather
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* than interrupt-driven, this is a good point to ask HIF to check
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* whether it has any completed sends to handle.
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*/
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if (ep->ul_is_polled)
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ath10k_htc_send_complete_check(ep, 1);
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payload_len = __le16_to_cpu(hdr->len);
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if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
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ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
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payload_len + sizeof(*hdr));
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ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
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hdr, sizeof(*hdr));
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status = -EINVAL;
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goto out;
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}
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if (skb->len < payload_len) {
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ath10k_dbg(ar, ATH10K_DBG_HTC,
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"HTC Rx: insufficient length, got %d, expected %d\n",
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skb->len, payload_len);
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ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
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"", hdr, sizeof(*hdr));
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status = -EINVAL;
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goto out;
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}
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/* get flags to check for trailer */
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trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
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if (trailer_present) {
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u8 *trailer;
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trailer_len = hdr->trailer_len;
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min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
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if ((trailer_len < min_len) ||
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(trailer_len > payload_len)) {
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ath10k_warn(ar, "Invalid trailer length: %d\n",
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trailer_len);
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status = -EPROTO;
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goto out;
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}
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trailer = (u8 *)hdr;
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trailer += sizeof(*hdr);
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trailer += payload_len;
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trailer -= trailer_len;
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status = ath10k_htc_process_trailer(htc, trailer,
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trailer_len, hdr->eid);
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if (status)
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goto out;
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skb_trim(skb, skb->len - trailer_len);
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}
|
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|
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if (((int)payload_len - (int)trailer_len) <= 0)
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/* zero length packet with trailer data, just drop these */
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goto out;
|
|
|
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if (eid == ATH10K_HTC_EP_0) {
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struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
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|
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switch (__le16_to_cpu(msg->hdr.message_id)) {
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case ATH10K_HTC_MSG_READY_ID:
|
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case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
|
|
/* handle HTC control message */
|
|
if (completion_done(&htc->ctl_resp)) {
|
|
/*
|
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* this is a fatal error, target should not be
|
|
* sending unsolicited messages on the ep 0
|
|
*/
|
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ath10k_warn(ar, "HTC rx ctrl still processing\n");
|
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status = -EINVAL;
|
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complete(&htc->ctl_resp);
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goto out;
|
|
}
|
|
|
|
htc->control_resp_len =
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min_t(int, skb->len,
|
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ATH10K_HTC_MAX_CTRL_MSG_LEN);
|
|
|
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memcpy(htc->control_resp_buffer, skb->data,
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htc->control_resp_len);
|
|
|
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complete(&htc->ctl_resp);
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break;
|
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case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
|
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htc->htc_ops.target_send_suspend_complete(ar);
|
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break;
|
|
default:
|
|
ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
|
|
break;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n",
|
|
eid, skb);
|
|
ep->ep_ops.ep_rx_complete(ar, skb);
|
|
|
|
/* skb is now owned by the rx completion handler */
|
|
skb = NULL;
|
|
out:
|
|
kfree_skb(skb);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void ath10k_htc_control_rx_complete(struct ath10k *ar,
|
|
struct sk_buff *skb)
|
|
{
|
|
/* This is unexpected. FW is not supposed to send regular rx on this
|
|
* endpoint. */
|
|
ath10k_warn(ar, "unexpected htc rx\n");
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/***************/
|
|
/* Init/Deinit */
|
|
/***************/
|
|
|
|
static const char *htc_service_name(enum ath10k_htc_svc_id id)
|
|
{
|
|
switch (id) {
|
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case ATH10K_HTC_SVC_ID_RESERVED:
|
|
return "Reserved";
|
|
case ATH10K_HTC_SVC_ID_RSVD_CTRL:
|
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return "Control";
|
|
case ATH10K_HTC_SVC_ID_WMI_CONTROL:
|
|
return "WMI";
|
|
case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
|
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return "DATA BE";
|
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case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
|
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return "DATA BK";
|
|
case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
|
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return "DATA VI";
|
|
case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
|
|
return "DATA VO";
|
|
case ATH10K_HTC_SVC_ID_NMI_CONTROL:
|
|
return "NMI Control";
|
|
case ATH10K_HTC_SVC_ID_NMI_DATA:
|
|
return "NMI Data";
|
|
case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
|
|
return "HTT Data";
|
|
case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
|
|
return "RAW";
|
|
}
|
|
|
|
return "Unknown";
|
|
}
|
|
|
|
static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
|
|
{
|
|
struct ath10k_htc_ep *ep;
|
|
int i;
|
|
|
|
for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
|
|
ep = &htc->endpoint[i];
|
|
ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
|
|
ep->max_ep_message_len = 0;
|
|
ep->max_tx_queue_depth = 0;
|
|
ep->eid = i;
|
|
ep->htc = htc;
|
|
ep->tx_credit_flow_enabled = true;
|
|
}
|
|
}
|
|
|
|
static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc)
|
|
{
|
|
struct ath10k_htc_svc_tx_credits *entry;
|
|
|
|
entry = &htc->service_tx_alloc[0];
|
|
|
|
/*
|
|
* for PCIE allocate all credists/HTC buffers to WMI.
|
|
* no buffers are used/required for data. data always
|
|
* remains on host.
|
|
*/
|
|
entry++;
|
|
entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL;
|
|
entry->credit_allocation = htc->total_transmit_credits;
|
|
}
|
|
|
|
static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
|
|
u16 service_id)
|
|
{
|
|
u8 allocation = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) {
|
|
if (htc->service_tx_alloc[i].service_id == service_id)
|
|
allocation =
|
|
htc->service_tx_alloc[i].credit_allocation;
|
|
}
|
|
|
|
return allocation;
|
|
}
|
|
|
|
int ath10k_htc_wait_target(struct ath10k_htc *htc)
|
|
{
|
|
struct ath10k *ar = htc->ar;
|
|
int i, status = 0;
|
|
unsigned long time_left;
|
|
struct ath10k_htc_svc_conn_req conn_req;
|
|
struct ath10k_htc_svc_conn_resp conn_resp;
|
|
struct ath10k_htc_msg *msg;
|
|
u16 message_id;
|
|
u16 credit_count;
|
|
u16 credit_size;
|
|
|
|
time_left = wait_for_completion_timeout(&htc->ctl_resp,
|
|
ATH10K_HTC_WAIT_TIMEOUT_HZ);
|
|
if (!time_left) {
|
|
/* Workaround: In some cases the PCI HIF doesn't
|
|
* receive interrupt for the control response message
|
|
* even if the buffer was completed. It is suspected
|
|
* iomap writes unmasking PCI CE irqs aren't propagated
|
|
* properly in KVM PCI-passthrough sometimes.
|
|
*/
|
|
ath10k_warn(ar, "failed to receive control response completion, polling..\n");
|
|
|
|
for (i = 0; i < CE_COUNT; i++)
|
|
ath10k_hif_send_complete_check(htc->ar, i, 1);
|
|
|
|
time_left =
|
|
wait_for_completion_timeout(&htc->ctl_resp,
|
|
ATH10K_HTC_WAIT_TIMEOUT_HZ);
|
|
|
|
if (!time_left)
|
|
status = -ETIMEDOUT;
|
|
}
|
|
|
|
if (status < 0) {
|
|
ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
|
|
return status;
|
|
}
|
|
|
|
if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
|
|
ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
|
|
htc->control_resp_len);
|
|
return -ECOMM;
|
|
}
|
|
|
|
msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
|
|
message_id = __le16_to_cpu(msg->hdr.message_id);
|
|
credit_count = __le16_to_cpu(msg->ready.credit_count);
|
|
credit_size = __le16_to_cpu(msg->ready.credit_size);
|
|
|
|
if (message_id != ATH10K_HTC_MSG_READY_ID) {
|
|
ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
|
|
return -ECOMM;
|
|
}
|
|
|
|
htc->total_transmit_credits = credit_count;
|
|
htc->target_credit_size = credit_size;
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_HTC,
|
|
"Target ready! transmit resources: %d size:%d\n",
|
|
htc->total_transmit_credits,
|
|
htc->target_credit_size);
|
|
|
|
if ((htc->total_transmit_credits == 0) ||
|
|
(htc->target_credit_size == 0)) {
|
|
ath10k_err(ar, "Invalid credit size received\n");
|
|
return -ECOMM;
|
|
}
|
|
|
|
ath10k_htc_setup_target_buffer_assignments(htc);
|
|
|
|
/* setup our pseudo HTC control endpoint connection */
|
|
memset(&conn_req, 0, sizeof(conn_req));
|
|
memset(&conn_resp, 0, sizeof(conn_resp));
|
|
conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
|
|
conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
|
|
conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
|
|
conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
|
|
|
|
/* connect fake service */
|
|
status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
|
|
if (status) {
|
|
ath10k_err(ar, "could not connect to htc service (%d)\n",
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ath10k_htc_connect_service(struct ath10k_htc *htc,
|
|
struct ath10k_htc_svc_conn_req *conn_req,
|
|
struct ath10k_htc_svc_conn_resp *conn_resp)
|
|
{
|
|
struct ath10k *ar = htc->ar;
|
|
struct ath10k_htc_msg *msg;
|
|
struct ath10k_htc_conn_svc *req_msg;
|
|
struct ath10k_htc_conn_svc_response resp_msg_dummy;
|
|
struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
|
|
enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
|
|
struct ath10k_htc_ep *ep;
|
|
struct sk_buff *skb;
|
|
unsigned int max_msg_size = 0;
|
|
int length, status;
|
|
unsigned long time_left;
|
|
bool disable_credit_flow_ctrl = false;
|
|
u16 message_id, service_id, flags = 0;
|
|
u8 tx_alloc = 0;
|
|
|
|
/* special case for HTC pseudo control service */
|
|
if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
|
|
disable_credit_flow_ctrl = true;
|
|
assigned_eid = ATH10K_HTC_EP_0;
|
|
max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
|
|
memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
|
|
goto setup;
|
|
}
|
|
|
|
tx_alloc = ath10k_htc_get_credit_allocation(htc,
|
|
conn_req->service_id);
|
|
if (!tx_alloc)
|
|
ath10k_dbg(ar, ATH10K_DBG_BOOT,
|
|
"boot htc service %s does not allocate target credits\n",
|
|
htc_service_name(conn_req->service_id));
|
|
|
|
skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
|
|
if (!skb) {
|
|
ath10k_err(ar, "Failed to allocate HTC packet\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
length = sizeof(msg->hdr) + sizeof(msg->connect_service);
|
|
skb_put(skb, length);
|
|
memset(skb->data, 0, length);
|
|
|
|
msg = (struct ath10k_htc_msg *)skb->data;
|
|
msg->hdr.message_id =
|
|
__cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
|
|
|
|
flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
|
|
|
|
/* Only enable credit flow control for WMI ctrl service */
|
|
if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
|
|
flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
|
|
disable_credit_flow_ctrl = true;
|
|
}
|
|
|
|
req_msg = &msg->connect_service;
|
|
req_msg->flags = __cpu_to_le16(flags);
|
|
req_msg->service_id = __cpu_to_le16(conn_req->service_id);
|
|
|
|
reinit_completion(&htc->ctl_resp);
|
|
|
|
status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
|
|
if (status) {
|
|
kfree_skb(skb);
|
|
return status;
|
|
}
|
|
|
|
/* wait for response */
|
|
time_left = wait_for_completion_timeout(&htc->ctl_resp,
|
|
ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
|
|
if (!time_left) {
|
|
ath10k_err(ar, "Service connect timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* we controlled the buffer creation, it's aligned */
|
|
msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
|
|
resp_msg = &msg->connect_service_response;
|
|
message_id = __le16_to_cpu(msg->hdr.message_id);
|
|
service_id = __le16_to_cpu(resp_msg->service_id);
|
|
|
|
if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
|
|
(htc->control_resp_len < sizeof(msg->hdr) +
|
|
sizeof(msg->connect_service_response))) {
|
|
ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
|
|
return -EPROTO;
|
|
}
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_HTC,
|
|
"HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
|
|
htc_service_name(service_id),
|
|
resp_msg->status, resp_msg->eid);
|
|
|
|
conn_resp->connect_resp_code = resp_msg->status;
|
|
|
|
/* check response status */
|
|
if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
|
|
ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
|
|
htc_service_name(service_id),
|
|
resp_msg->status);
|
|
return -EPROTO;
|
|
}
|
|
|
|
assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
|
|
max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
|
|
|
|
setup:
|
|
|
|
if (assigned_eid >= ATH10K_HTC_EP_COUNT)
|
|
return -EPROTO;
|
|
|
|
if (max_msg_size == 0)
|
|
return -EPROTO;
|
|
|
|
ep = &htc->endpoint[assigned_eid];
|
|
ep->eid = assigned_eid;
|
|
|
|
if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
|
|
return -EPROTO;
|
|
|
|
/* return assigned endpoint to caller */
|
|
conn_resp->eid = assigned_eid;
|
|
conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
|
|
|
|
/* setup the endpoint */
|
|
ep->service_id = conn_req->service_id;
|
|
ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
|
|
ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
|
|
ep->tx_credits = tx_alloc;
|
|
ep->tx_credit_size = htc->target_credit_size;
|
|
ep->tx_credits_per_max_message = ep->max_ep_message_len /
|
|
htc->target_credit_size;
|
|
|
|
if (ep->max_ep_message_len % htc->target_credit_size)
|
|
ep->tx_credits_per_max_message++;
|
|
|
|
/* copy all the callbacks */
|
|
ep->ep_ops = conn_req->ep_ops;
|
|
|
|
status = ath10k_hif_map_service_to_pipe(htc->ar,
|
|
ep->service_id,
|
|
&ep->ul_pipe_id,
|
|
&ep->dl_pipe_id,
|
|
&ep->ul_is_polled,
|
|
&ep->dl_is_polled);
|
|
if (status)
|
|
return status;
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_BOOT,
|
|
"boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
|
|
htc_service_name(ep->service_id), ep->ul_pipe_id,
|
|
ep->dl_pipe_id, ep->eid);
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_BOOT,
|
|
"boot htc ep %d ul polled %d dl polled %d\n",
|
|
ep->eid, ep->ul_is_polled, ep->dl_is_polled);
|
|
|
|
if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
|
|
ep->tx_credit_flow_enabled = false;
|
|
ath10k_dbg(ar, ATH10K_DBG_BOOT,
|
|
"boot htc service '%s' eid %d TX flow control disabled\n",
|
|
htc_service_name(ep->service_id), assigned_eid);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
|
|
|
|
/* FW/HTC requires 4-byte aligned streams */
|
|
if (!IS_ALIGNED((unsigned long)skb->data, 4))
|
|
ath10k_warn(ar, "Unaligned HTC tx skb\n");
|
|
|
|
return skb;
|
|
}
|
|
|
|
int ath10k_htc_start(struct ath10k_htc *htc)
|
|
{
|
|
struct ath10k *ar = htc->ar;
|
|
struct sk_buff *skb;
|
|
int status = 0;
|
|
struct ath10k_htc_msg *msg;
|
|
|
|
skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
|
|
memset(skb->data, 0, skb->len);
|
|
|
|
msg = (struct ath10k_htc_msg *)skb->data;
|
|
msg->hdr.message_id =
|
|
__cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
|
|
|
|
ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
|
|
|
|
status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
|
|
if (status) {
|
|
kfree_skb(skb);
|
|
return status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* registered target arrival callback from the HIF layer */
|
|
int ath10k_htc_init(struct ath10k *ar)
|
|
{
|
|
struct ath10k_hif_cb htc_callbacks;
|
|
struct ath10k_htc_ep *ep = NULL;
|
|
struct ath10k_htc *htc = &ar->htc;
|
|
|
|
spin_lock_init(&htc->tx_lock);
|
|
|
|
ath10k_htc_reset_endpoint_states(htc);
|
|
|
|
/* setup HIF layer callbacks */
|
|
htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler;
|
|
htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler;
|
|
htc->ar = ar;
|
|
|
|
/* Get HIF default pipe for HTC message exchange */
|
|
ep = &htc->endpoint[ATH10K_HTC_EP_0];
|
|
|
|
ath10k_hif_set_callbacks(ar, &htc_callbacks);
|
|
ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id);
|
|
|
|
init_completion(&htc->ctl_resp);
|
|
|
|
return 0;
|
|
}
|