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ath10k: don't use interrupts for BMI 

It's not really necessary for interrupts to be
used for BMI. BMI already assumes there's only one
caller at a time and it works directly with CE.

Make BMI poll for CE completions instead of
waiting for interrupts. This makes disabling
interrupts during early boot possible.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2013-11-25 14:06:22 +01:00 committed by Kalle Valo
parent fc15ca13a6
commit 85622cde05
1 changed files with 26 additions and 24 deletions
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50
drivers/net/wireless/ath/ath10k/pci.c
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@ -59,6 +59,9 @@ static int ath10k_pci_init_irq(struct ath10k *ar);
static int ath10k_pci_deinit_irq(struct ath10k *ar);
static int ath10k_pci_request_irq(struct ath10k *ar);
static void ath10k_pci_free_irq(struct ath10k *ar);
static int ath10k_pci_bmi_wait(struct ath10k_ce_pipe *tx_pipe,
struct ath10k_ce_pipe *rx_pipe,
struct bmi_xfer *xfer);
static const struct ce_attr host_ce_config_wlan[] = {
/* CE0: host->target HTC control and raw streams */
@ -1394,6 +1397,8 @@ static int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar,
void *treq, *tresp = NULL;
int ret = 0;
might_sleep();
if (resp && !resp_len)
return -EINVAL;
@ -1434,14 +1439,12 @@ static int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar,
if (ret)
goto err_resp;
ret = wait_for_completion_timeout(&xfer.done,
BMI_COMMUNICATION_TIMEOUT_HZ);
if (ret <= 0) {
ret = ath10k_pci_bmi_wait(ce_tx, ce_rx, &xfer);
if (ret) {
u32 unused_buffer;
unsigned int unused_nbytes;
unsigned int unused_id;
ret = -ETIMEDOUT;
ath10k_ce_cancel_send_next(ce_tx, NULL, &unused_buffer,
&unused_nbytes, &unused_id);
} else {
@ -1509,6 +1512,25 @@ static void ath10k_pci_bmi_recv_data(struct ath10k_ce_pipe *ce_state)
complete(&xfer->done);
}
static int ath10k_pci_bmi_wait(struct ath10k_ce_pipe *tx_pipe,
struct ath10k_ce_pipe *rx_pipe,
struct bmi_xfer *xfer)
{
unsigned long timeout = jiffies + BMI_COMMUNICATION_TIMEOUT_HZ;
while (time_before_eq(jiffies, timeout)) {
ath10k_pci_bmi_send_done(tx_pipe);
ath10k_pci_bmi_recv_data(rx_pipe);
if (completion_done(&xfer->done))
return 0;
schedule();
}
return -ETIMEDOUT;
}
/*
* Map from service/endpoint to Copy Engine.
* This table is derived from the CE_PCI TABLE, above.
@ -1846,24 +1868,6 @@ static void ath10k_pci_fw_interrupt_handler(struct ath10k *ar)
ath10k_pci_sleep(ar);
}
static void ath10k_pci_start_bmi(struct ath10k *ar)
{
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
struct ath10k_pci_pipe *pipe;
/*
* Initially, establish CE completion handlers for use with BMI.
* These are overwritten with generic handlers after we exit BMI phase.
*/
pipe = &ar_pci->pipe_info[BMI_CE_NUM_TO_TARG];
ath10k_ce_send_cb_register(pipe->ce_hdl, ath10k_pci_bmi_send_done, 0);
pipe = &ar_pci->pipe_info[BMI_CE_NUM_TO_HOST];
ath10k_ce_recv_cb_register(pipe->ce_hdl, ath10k_pci_bmi_recv_data);
ath10k_dbg(ATH10K_DBG_BOOT, "boot start bmi\n");
}
static int ath10k_pci_hif_power_up(struct ath10k *ar)
{
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
@ -1938,8 +1942,6 @@ static int ath10k_pci_hif_power_up(struct ath10k *ar)
goto err_free_irq;
}
ath10k_pci_start_bmi(ar);
if (ar_pci->num_msi_intrs > 1)
irq_mode = "MSI-X";
else if (ar_pci->num_msi_intrs == 1)