c3c15582fd
is totally disabled. The Atheros HAL code does this for Sowl/Howl but not for Owl (AR5416) where RIFS is disabled by default. This seems to quieten the occasional baseband hang I've been seeing with the AR9160 in STA mode under constant heavy traffic load. Obtained from: Atheros
563 lines
15 KiB
C
563 lines
15 KiB
C
/*
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* Copyright (c) 2002-2008 Atheros Communications, 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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* $FreeBSD$
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*/
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#include "opt_ah.h"
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#include "ah.h"
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#include "ah_internal.h"
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#include "ah_devid.h"
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#ifdef AH_DEBUG
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#include "ah_desc.h" /* NB: for HAL_PHYERR* */
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#endif
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#include "ar5416/ar5416.h"
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#include "ar5416/ar5416reg.h"
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#include "ar5416/ar5416phy.h"
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/*
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* Return the wireless modes (a,b,g,n,t) supported by hardware.
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*
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* This value is what is actually supported by the hardware
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* and is unaffected by regulatory/country code settings.
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*
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*/
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u_int
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ar5416GetWirelessModes(struct ath_hal *ah)
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{
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u_int mode;
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struct ath_hal_private *ahpriv = AH_PRIVATE(ah);
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HAL_CAPABILITIES *pCap = &ahpriv->ah_caps;
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mode = ar5212GetWirelessModes(ah);
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/* Only enable HT modes if the NIC supports HT */
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if (pCap->halHTSupport == AH_TRUE && (mode & HAL_MODE_11A))
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mode |= HAL_MODE_11NA_HT20
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| HAL_MODE_11NA_HT40PLUS
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| HAL_MODE_11NA_HT40MINUS
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;
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if (pCap->halHTSupport == AH_TRUE && (mode & HAL_MODE_11G))
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mode |= HAL_MODE_11NG_HT20
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| HAL_MODE_11NG_HT40PLUS
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| HAL_MODE_11NG_HT40MINUS
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;
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return mode;
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}
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/*
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* Change the LED blinking pattern to correspond to the connectivity
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*/
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void
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ar5416SetLedState(struct ath_hal *ah, HAL_LED_STATE state)
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{
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static const uint32_t ledbits[8] = {
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AR_MAC_LED_ASSOC_NONE, /* HAL_LED_INIT */
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AR_MAC_LED_ASSOC_PEND, /* HAL_LED_SCAN */
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AR_MAC_LED_ASSOC_PEND, /* HAL_LED_AUTH */
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AR_MAC_LED_ASSOC_ACTIVE, /* HAL_LED_ASSOC*/
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AR_MAC_LED_ASSOC_ACTIVE, /* HAL_LED_RUN */
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AR_MAC_LED_ASSOC_NONE,
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AR_MAC_LED_ASSOC_NONE,
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AR_MAC_LED_ASSOC_NONE,
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};
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uint32_t bits;
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if (AR_SREV_HOWL(ah))
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return;
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bits = OS_REG_READ(ah, AR_MAC_LED);
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bits = (bits &~ AR_MAC_LED_MODE)
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| SM(AR_MAC_LED_MODE_POWON, AR_MAC_LED_MODE)
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#if 1
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| SM(AR_MAC_LED_MODE_NETON, AR_MAC_LED_MODE)
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#endif
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;
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bits = (bits &~ AR_MAC_LED_ASSOC)
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| SM(ledbits[state & 0x7], AR_MAC_LED_ASSOC);
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OS_REG_WRITE(ah, AR_MAC_LED, bits);
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}
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/*
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* Reset the current hardware tsf for stamlme.
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*/
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void
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ar5416ResetTsf(struct ath_hal *ah)
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{
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uint32_t v;
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int i;
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for (i = 0; i < 10; i++) {
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v = OS_REG_READ(ah, AR_SLP32_MODE);
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if ((v & AR_SLP32_TSF_WRITE_STATUS) == 0)
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break;
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OS_DELAY(10);
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}
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OS_REG_WRITE(ah, AR_RESET_TSF, AR_RESET_TSF_ONCE);
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}
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HAL_BOOL
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ar5416SetAntennaSwitch(struct ath_hal *ah, HAL_ANT_SETTING settings)
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{
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return AH_TRUE;
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}
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/* Setup decompression for given key index */
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HAL_BOOL
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ar5416SetDecompMask(struct ath_hal *ah, uint16_t keyidx, int en)
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{
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return HAL_OK;
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}
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/* Setup coverage class */
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void
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ar5416SetCoverageClass(struct ath_hal *ah, uint8_t coverageclass, int now)
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{
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AH_PRIVATE(ah)->ah_coverageClass = coverageclass;
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}
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/*
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* Return approximation of extension channel busy over an time interval
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* 0% (clear) -> 100% (busy)
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*
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*/
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uint32_t
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ar5416Get11nExtBusy(struct ath_hal *ah)
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{
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struct ath_hal_5416 *ahp = AH5416(ah);
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uint32_t busy; /* percentage */
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uint32_t cycleCount, ctlBusy, extBusy;
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ctlBusy = OS_REG_READ(ah, AR_RCCNT);
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extBusy = OS_REG_READ(ah, AR_EXTRCCNT);
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cycleCount = OS_REG_READ(ah, AR_CCCNT);
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if (ahp->ah_cycleCount == 0 || ahp->ah_cycleCount > cycleCount) {
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/*
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* Cycle counter wrap (or initial call); it's not possible
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* to accurately calculate a value because the registers
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* right shift rather than wrap--so punt and return 0.
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*/
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busy = 0;
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HALDEBUG(ah, HAL_DEBUG_ANY, "%s: cycle counter wrap. ExtBusy = 0\n",
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__func__);
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} else {
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uint32_t cycleDelta = cycleCount - ahp->ah_cycleCount;
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uint32_t ctlBusyDelta = ctlBusy - ahp->ah_ctlBusy;
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uint32_t extBusyDelta = extBusy - ahp->ah_extBusy;
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uint32_t ctlClearDelta = 0;
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/* Compute control channel rxclear.
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* The cycle delta may be less than the control channel delta.
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* This could be solved by freezing the timers (or an atomic read,
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* if one was available). Checking for the condition should be
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* sufficient.
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*/
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if (cycleDelta > ctlBusyDelta) {
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ctlClearDelta = cycleDelta - ctlBusyDelta;
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}
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/* Compute ratio of extension channel busy to control channel clear
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* as an approximation to extension channel cleanliness.
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*
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* According to the hardware folks, ext rxclear is undefined
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* if the ctrl rxclear is de-asserted (i.e. busy)
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*/
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if (ctlClearDelta) {
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busy = (extBusyDelta * 100) / ctlClearDelta;
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} else {
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busy = 100;
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}
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if (busy > 100) {
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busy = 100;
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}
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#if 0
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HALDEBUG(ah, HAL_DEBUG_ANY, "%s: cycleDelta 0x%x, ctlBusyDelta 0x%x, "
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"extBusyDelta 0x%x, ctlClearDelta 0x%x, "
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"busy %d\n",
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__func__, cycleDelta, ctlBusyDelta, extBusyDelta, ctlClearDelta, busy);
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#endif
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}
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ahp->ah_cycleCount = cycleCount;
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ahp->ah_ctlBusy = ctlBusy;
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ahp->ah_extBusy = extBusy;
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return busy;
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}
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/*
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* Configure 20/40 operation
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*
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* 20/40 = joint rx clear (control and extension)
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* 20 = rx clear (control)
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*
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* - NOTE: must stop MAC (tx) and requeue 40 MHz packets as 20 MHz when changing
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* from 20/40 => 20 only
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*/
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void
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ar5416Set11nMac2040(struct ath_hal *ah, HAL_HT_MACMODE mode)
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{
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uint32_t macmode;
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/* Configure MAC for 20/40 operation */
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if (mode == HAL_HT_MACMODE_2040) {
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macmode = AR_2040_JOINED_RX_CLEAR;
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} else {
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macmode = 0;
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}
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OS_REG_WRITE(ah, AR_2040_MODE, macmode);
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}
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/*
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* Get Rx clear (control/extension channel)
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*
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* Returns active low (busy) for ctrl/ext channel
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* Owl 2.0
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*/
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HAL_HT_RXCLEAR
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ar5416Get11nRxClear(struct ath_hal *ah)
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{
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HAL_HT_RXCLEAR rxclear = 0;
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uint32_t val;
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val = OS_REG_READ(ah, AR_DIAG_SW);
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/* control channel */
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if (val & AR_DIAG_RXCLEAR_CTL_LOW) {
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rxclear |= HAL_RX_CLEAR_CTL_LOW;
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}
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/* extension channel */
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if (val & AR_DIAG_RXCLEAR_CTL_LOW) {
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rxclear |= HAL_RX_CLEAR_EXT_LOW;
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}
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return rxclear;
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}
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/*
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* Set Rx clear (control/extension channel)
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*
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* Useful for forcing the channel to appear busy for
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* debugging/diagnostics
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* Owl 2.0
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*/
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void
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ar5416Set11nRxClear(struct ath_hal *ah, HAL_HT_RXCLEAR rxclear)
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{
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/* control channel */
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if (rxclear & HAL_RX_CLEAR_CTL_LOW) {
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OS_REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_CTL_LOW);
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} else {
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OS_REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_CTL_LOW);
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}
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/* extension channel */
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if (rxclear & HAL_RX_CLEAR_EXT_LOW) {
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OS_REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_EXT_LOW);
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} else {
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OS_REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_RXCLEAR_EXT_LOW);
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}
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}
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HAL_STATUS
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ar5416GetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
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uint32_t capability, uint32_t *result)
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{
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switch (type) {
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case HAL_CAP_BB_HANG:
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switch (capability) {
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case HAL_BB_HANG_RIFS:
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return (AR_SREV_HOWL(ah) || AR_SREV_SOWL(ah)) ? HAL_OK : HAL_ENOTSUPP;
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case HAL_BB_HANG_DFS:
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return (AR_SREV_HOWL(ah) || AR_SREV_SOWL(ah)) ? HAL_OK : HAL_ENOTSUPP;
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case HAL_BB_HANG_RX_CLEAR:
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return AR_SREV_MERLIN(ah) ? HAL_OK : HAL_ENOTSUPP;
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}
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break;
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case HAL_CAP_MAC_HANG:
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return ((ah->ah_macVersion == AR_XSREV_VERSION_OWL_PCI) ||
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(ah->ah_macVersion == AR_XSREV_VERSION_OWL_PCIE) ||
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AR_SREV_HOWL(ah) || AR_SREV_SOWL(ah)) ?
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HAL_OK : HAL_ENOTSUPP;
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case HAL_CAP_DIVERSITY: /* disable classic fast diversity */
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return HAL_ENXIO;
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default:
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break;
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}
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return ar5212GetCapability(ah, type, capability, result);
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}
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static int ar5416DetectMacHang(struct ath_hal *ah);
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static int ar5416DetectBBHang(struct ath_hal *ah);
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HAL_BOOL
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ar5416GetDiagState(struct ath_hal *ah, int request,
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const void *args, uint32_t argsize,
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void **result, uint32_t *resultsize)
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{
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struct ath_hal_5416 *ahp = AH5416(ah);
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int hangs;
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if (ath_hal_getdiagstate(ah, request, args, argsize, result, resultsize))
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return AH_TRUE;
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switch (request) {
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case HAL_DIAG_EEPROM:
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return ath_hal_eepromDiag(ah, request,
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args, argsize, result, resultsize);
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case HAL_DIAG_CHECK_HANGS:
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if (argsize != sizeof(int))
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return AH_FALSE;
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hangs = *(const int *) args;
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ahp->ah_hangs = 0;
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if (hangs & HAL_BB_HANGS)
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ahp->ah_hangs |= ar5416DetectBBHang(ah);
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/* NB: if BB is hung MAC will be hung too so skip check */
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if (ahp->ah_hangs == 0 && (hangs & HAL_MAC_HANGS))
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ahp->ah_hangs |= ar5416DetectMacHang(ah);
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*result = &ahp->ah_hangs;
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*resultsize = sizeof(ahp->ah_hangs);
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return AH_TRUE;
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}
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return ar5212GetDiagState(ah, request,
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args, argsize, result, resultsize);
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}
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typedef struct {
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uint32_t dma_dbg_3;
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uint32_t dma_dbg_4;
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uint32_t dma_dbg_5;
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uint32_t dma_dbg_6;
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} mac_dbg_regs_t;
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typedef enum {
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dcu_chain_state = 0x1,
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dcu_complete_state = 0x2,
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qcu_state = 0x4,
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qcu_fsp_ok = 0x8,
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qcu_fsp_state = 0x10,
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qcu_stitch_state = 0x20,
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qcu_fetch_state = 0x40,
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qcu_complete_state = 0x80
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} hal_mac_hangs_t;
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typedef struct {
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int states;
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uint8_t dcu_chain_state;
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uint8_t dcu_complete_state;
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uint8_t qcu_state;
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uint8_t qcu_fsp_ok;
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uint8_t qcu_fsp_state;
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uint8_t qcu_stitch_state;
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uint8_t qcu_fetch_state;
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uint8_t qcu_complete_state;
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} hal_mac_hang_check_t;
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HAL_BOOL
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ar5416SetRifsDelay(struct ath_hal *ah, const struct ieee80211_channel *chan,
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HAL_BOOL enable)
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{
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uint32_t val;
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HAL_BOOL is_chan_2g = AH_FALSE;
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HAL_BOOL is_ht40 = AH_FALSE;
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if (chan)
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is_chan_2g = IEEE80211_IS_CHAN_2GHZ(chan);
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if (chan)
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is_ht40 = IEEE80211_IS_CHAN_HT40(chan);
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/* Only support disabling RIFS delay for now */
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HALASSERT(enable == AH_FALSE);
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if (enable == AH_TRUE)
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return AH_FALSE;
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/* Change RIFS init delay to 0 */
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val = OS_REG_READ(ah, AR_PHY_HEAVY_CLIP_FACTOR_RIFS);
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val &= ~AR_PHY_RIFS_INIT_DELAY;
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OS_REG_WRITE(ah, AR_PHY_HEAVY_CLIP_FACTOR_RIFS, val);
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/*
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* For Owl, RIFS RX parameters are controlled differently;
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* it isn't enabled in the inivals by default.
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*
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* For Sowl/Howl, RIFS RX is enabled in the inivals by default;
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* the following code sets them back to non-RIFS values.
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*
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* For > Sowl/Howl, RIFS RX can be left on by default and so
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* this function shouldn't be called.
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*/
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if ((! AR_SREV_SOWL(ah)) && (! AR_SREV_HOWL(ah)))
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return AH_TRUE;
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/* Reset search delay to default values */
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if (is_chan_2g)
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if (is_ht40)
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OS_REG_WRITE(ah, AR_PHY_SEARCH_START_DELAY, 0x268);
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else
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OS_REG_WRITE(ah, AR_PHY_SEARCH_START_DELAY, 0x134);
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else
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if (is_ht40)
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OS_REG_WRITE(ah, AR_PHY_SEARCH_START_DELAY, 0x370);
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else
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OS_REG_WRITE(ah, AR_PHY_SEARCH_START_DELAY, 0x1b8);
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return AH_TRUE;
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}
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static HAL_BOOL
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ar5416CompareDbgHang(struct ath_hal *ah, const mac_dbg_regs_t *regs,
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const hal_mac_hang_check_t *check)
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{
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int found_states;
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found_states = 0;
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if (check->states & dcu_chain_state) {
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int i;
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for (i = 0; i < 6; i++) {
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if (((regs->dma_dbg_4 >> (5*i)) & 0x1f) ==
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check->dcu_chain_state)
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found_states |= dcu_chain_state;
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}
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for (i = 0; i < 4; i++) {
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if (((regs->dma_dbg_5 >> (5*i)) & 0x1f) ==
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check->dcu_chain_state)
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found_states |= dcu_chain_state;
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}
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}
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if (check->states & dcu_complete_state) {
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if ((regs->dma_dbg_6 & 0x3) == check->dcu_complete_state)
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found_states |= dcu_complete_state;
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}
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if (check->states & qcu_stitch_state) {
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if (((regs->dma_dbg_3 >> 18) & 0xf) == check->qcu_stitch_state)
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found_states |= qcu_stitch_state;
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}
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if (check->states & qcu_fetch_state) {
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if (((regs->dma_dbg_3 >> 22) & 0xf) == check->qcu_fetch_state)
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found_states |= qcu_fetch_state;
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}
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if (check->states & qcu_complete_state) {
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if (((regs->dma_dbg_3 >> 26) & 0x7) == check->qcu_complete_state)
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found_states |= qcu_complete_state;
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}
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return (found_states == check->states);
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}
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#define NUM_STATUS_READS 50
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static int
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ar5416DetectMacHang(struct ath_hal *ah)
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{
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static const hal_mac_hang_check_t hang_sig1 = {
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.dcu_chain_state = 0x6,
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.dcu_complete_state = 0x1,
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.states = dcu_chain_state
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| dcu_complete_state,
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};
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static const hal_mac_hang_check_t hang_sig2 = {
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.qcu_stitch_state = 0x9,
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.qcu_fetch_state = 0x8,
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.qcu_complete_state = 0x4,
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.states = qcu_stitch_state
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| qcu_fetch_state
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|
| qcu_complete_state,
|
|
};
|
|
mac_dbg_regs_t mac_dbg;
|
|
int i;
|
|
|
|
mac_dbg.dma_dbg_3 = OS_REG_READ(ah, AR_DMADBG_3);
|
|
mac_dbg.dma_dbg_4 = OS_REG_READ(ah, AR_DMADBG_4);
|
|
mac_dbg.dma_dbg_5 = OS_REG_READ(ah, AR_DMADBG_5);
|
|
mac_dbg.dma_dbg_6 = OS_REG_READ(ah, AR_DMADBG_6);
|
|
for (i = 1; i <= NUM_STATUS_READS; i++) {
|
|
if (mac_dbg.dma_dbg_3 != OS_REG_READ(ah, AR_DMADBG_3) ||
|
|
mac_dbg.dma_dbg_4 != OS_REG_READ(ah, AR_DMADBG_4) ||
|
|
mac_dbg.dma_dbg_5 != OS_REG_READ(ah, AR_DMADBG_5) ||
|
|
mac_dbg.dma_dbg_6 != OS_REG_READ(ah, AR_DMADBG_6))
|
|
return 0;
|
|
}
|
|
|
|
if (ar5416CompareDbgHang(ah, &mac_dbg, &hang_sig1))
|
|
return HAL_MAC_HANG_SIG1;
|
|
if (ar5416CompareDbgHang(ah, &mac_dbg, &hang_sig2))
|
|
return HAL_MAC_HANG_SIG2;
|
|
|
|
HALDEBUG(ah, HAL_DEBUG_HANG, "%s Found an unknown MAC hang signature "
|
|
"DMADBG_3=0x%x DMADBG_4=0x%x DMADBG_5=0x%x DMADBG_6=0x%x\n",
|
|
__func__, mac_dbg.dma_dbg_3, mac_dbg.dma_dbg_4, mac_dbg.dma_dbg_5,
|
|
mac_dbg.dma_dbg_6);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Determine if the baseband using the Observation Bus Register
|
|
*/
|
|
static int
|
|
ar5416DetectBBHang(struct ath_hal *ah)
|
|
{
|
|
#define N(a) (sizeof(a)/sizeof(a[0]))
|
|
/*
|
|
* Check the PCU Observation Bus 1 register (0x806c)
|
|
* NUM_STATUS_READS times
|
|
*
|
|
* 4 known BB hang signatures -
|
|
* [1] bits 8,9,11 are 0. State machine state (bits 25-31) is 0x1E
|
|
* [2] bits 8,9 are 1, bit 11 is 0. State machine state
|
|
* (bits 25-31) is 0x52
|
|
* [3] bits 8,9 are 1, bit 11 is 0. State machine state
|
|
* (bits 25-31) is 0x18
|
|
* [4] bit 10 is 1, bit 11 is 0. WEP state (bits 12-17) is 0x2,
|
|
* Rx State (bits 20-24) is 0x7.
|
|
*/
|
|
static const struct {
|
|
uint32_t val;
|
|
uint32_t mask;
|
|
int code;
|
|
} hang_list[] = {
|
|
/* Reg Value Reg Mask Hang Code XXX */
|
|
{ 0x1E000000, 0x7E000B00, HAL_BB_HANG_DFS },
|
|
{ 0x52000B00, 0x7E000B00, HAL_BB_HANG_RIFS },
|
|
{ 0x18000B00, 0x7E000B00, HAL_BB_HANG_RX_CLEAR },
|
|
{ 0x00702400, 0x7E7FFFEF, HAL_BB_HANG_RX_CLEAR }
|
|
};
|
|
uint32_t hang_sig;
|
|
int i;
|
|
|
|
hang_sig = OS_REG_READ(ah, AR_OBSERV_1);
|
|
for (i = 1; i <= NUM_STATUS_READS; i++) {
|
|
if (hang_sig != OS_REG_READ(ah, AR_OBSERV_1))
|
|
return 0;
|
|
}
|
|
for (i = 0; i < N(hang_list); i++)
|
|
if ((hang_sig & hang_list[i].mask) == hang_list[i].val) {
|
|
HALDEBUG(ah, HAL_DEBUG_HANG,
|
|
"%s BB hang, signature 0x%x, code 0x%x\n",
|
|
__func__, hang_sig, hang_list[i].code);
|
|
return hang_list[i].code;
|
|
}
|
|
|
|
HALDEBUG(ah, HAL_DEBUG_HANG, "%s Found an unknown BB hang signature! "
|
|
"<0x806c>=0x%x\n", __func__, hang_sig);
|
|
|
|
return 0;
|
|
#undef N
|
|
}
|
|
#undef NUM_STATUS_READS
|