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wil6210: add advanced interrupt moderation

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Add advanced interrupt moderation support available since "Sparrow B0".
Legacy interrupt moderation used only one counter to moderate tx, rx,
and misc interrupts.
Advanced interrupt moderation bypasses misc, and handles separately tx
and rx interrupts. In addition it has two timers for each interrupt type.
Max burst duration timer which defines how long to postpone interrupt after
first event (receive event for rx and tx complete event for tx), and
interframe timeout which defines how to determine the end of the burst and
issue interrupt even if the first timer still pending.
Capabilities flags in wil_priv is set on initialization according to
HW. The rest of the code checks for advanced interrupt capability bit
in capabilities flags field.
Debugfs is split accordingly: "legacy" interrupt moderation remains
unchanged, new debugs files added for advanced interrupt moderation
support.
Module params are aligned to support advanced interrupt moderation
(tx & rx). When not available (for legacy interrupt moderation) will
use only rx configuration; Tx configuration will be ignored in this
case.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev
2014-12-23 09:47:19 +02:00
committed by Kalle Valo
parent 1aeda13be0
commit 78366f69be
6 changed files with 247 additions and 46 deletions
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56
drivers/net/wireless/ath/wil6210/main.c
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@@ -33,10 +33,34 @@ static bool no_fw_load = true;
module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
static unsigned int itr_trsh = WIL6210_ITR_TRSH_DEFAULT;
static unsigned int tx_interframe_timeout =
WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
module_param(tx_interframe_timeout, uint, S_IRUGO);
MODULE_PARM_DESC(tx_interframe_timeout,
" Interrupt moderation TX interframe timeout, usecs.");
static unsigned int rx_interframe_timeout =
WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
module_param(rx_interframe_timeout, uint, S_IRUGO);
MODULE_PARM_DESC(rx_interframe_timeout,
" Interrupt moderation RX interframe timeout, usecs.");
static unsigned int tx_max_burst_duration =
WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
module_param(tx_max_burst_duration, uint, S_IRUGO);
MODULE_PARM_DESC(tx_max_burst_duration,
" Interrupt moderation TX max burst duration, usecs.");
static unsigned int rx_max_burst_duration =
WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
module_param(rx_max_burst_duration, uint, S_IRUGO);
MODULE_PARM_DESC(rx_max_burst_duration,
" Interrupt moderation RX max burst duration, usecs.");
module_param(itr_trsh, uint, S_IRUGO);
MODULE_PARM_DESC(itr_trsh, " Interrupt moderation threshold, usecs.");
/* We allow allocation of more than 1 page buffers to support large packets.
* It is suboptimal behavior performance wise in case MTU above page size.
@@ -427,7 +451,10 @@ int wil_priv_init(struct wil6210_priv *wil)
goto out_wmi_wq;
wil->last_fw_recovery = jiffies;
wil->itr_trsh = itr_trsh;
wil->tx_interframe_timeout = tx_interframe_timeout;
wil->rx_interframe_timeout = rx_interframe_timeout;
wil->tx_max_burst_duration = tx_max_burst_duration;
wil->rx_max_burst_duration = rx_max_burst_duration;
return 0;
@@ -585,26 +612,6 @@ static int wil_target_reset(struct wil6210_priv *wil)
return 0;
}
/**
* wil_set_itr_trsh: - apply interrupt coalescing params
*/
void wil_set_itr_trsh(struct wil6210_priv *wil)
{
/* disable, use usec resolution */
W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
/* disable interrupt moderation for monitor
* to get better timestamp precision
*/
if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
return;
wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
}
#undef R
#undef W
#undef S
@@ -708,6 +715,7 @@ int wil_reset(struct wil6210_priv *wil)
reinit_completion(&wil->wmi_ready);
reinit_completion(&wil->wmi_call);
wil_configure_interrupt_moderation(wil);
wil_unmask_irq(wil);
/* we just started MAC, wait for FW ready */