static inline void ath10k_htc_send_complete_check(struct ath10k_htc_ep *ep,
int force)
{
/*
* Check whether HIF has any prior sends that have finished,
* have not had the post-processing done.
*/
ath10k_hif_send_complete_check(ep->htc->ar, ep->ul_pipe_id, force);
}
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_wait_target(struct ath10k_htc *htc)
{
struct ath10k *ar = htc->ar;
int i, status = 0;
unsigned long time_left;
struct ath10k_htc_msg *msg;
u16 message_id;
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);
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 = __le16_to_cpu(msg->ready.credit_count);
htc->target_credit_size = __le16_to_cpu(msg->ready.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;
}
/* The only way to determine if the ready message is an extended
* message is from the size.
*/
if (htc->control_resp_len >=
sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
htc->max_msgs_per_htc_bundle =
min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
HTC_HOST_MAX_MSG_PER_RX_BUNDLE);
ath10k_dbg(ar, ATH10K_DBG_HTC,
"Extended ready message. RX bundle size: %d\n",
htc->max_msgs_per_htc_bundle);
}
return 0;
}
