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path: root/drivers/net/wireless/ath/ath9k/mac.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/mac.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/mac.c1000
1 files changed, 1000 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
new file mode 100644
index 0000000..d937c39
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -0,0 +1,1000 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "hw.h"
+#include "hw-ops.h"
+#include <linux/export.h>
+
+static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
+ struct ath9k_tx_queue_info *qi)
+{
+ ath_dbg(ath9k_hw_common(ah), INTERRUPT,
+ "tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
+ ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
+ ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
+ ah->txurn_interrupt_mask);
+
+ ENABLE_REGWRITE_BUFFER(ah);
+
+ REG_WRITE(ah, AR_IMR_S0,
+ SM(ah->txok_interrupt_mask, AR_IMR_S0_QCU_TXOK)
+ | SM(ah->txdesc_interrupt_mask, AR_IMR_S0_QCU_TXDESC));
+ REG_WRITE(ah, AR_IMR_S1,
+ SM(ah->txerr_interrupt_mask, AR_IMR_S1_QCU_TXERR)
+ | SM(ah->txeol_interrupt_mask, AR_IMR_S1_QCU_TXEOL));
+
+ ah->imrs2_reg &= ~AR_IMR_S2_QCU_TXURN;
+ ah->imrs2_reg |= (ah->txurn_interrupt_mask & AR_IMR_S2_QCU_TXURN);
+ REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
+
+ REGWRITE_BUFFER_FLUSH(ah);
+}
+
+u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q)
+{
+ return REG_READ(ah, AR_QTXDP(q));
+}
+EXPORT_SYMBOL(ath9k_hw_gettxbuf);
+
+void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
+{
+ REG_WRITE(ah, AR_QTXDP(q), txdp);
+}
+EXPORT_SYMBOL(ath9k_hw_puttxbuf);
+
+void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
+{
+ ath_dbg(ath9k_hw_common(ah), QUEUE, "Enable TXE on queue: %u\n", q);
+ REG_WRITE(ah, AR_Q_TXE, 1 << q);
+}
+EXPORT_SYMBOL(ath9k_hw_txstart);
+
+u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
+{
+ u32 npend;
+
+ npend = REG_READ(ah, AR_QSTS(q)) & AR_Q_STS_PEND_FR_CNT;
+ if (npend == 0) {
+
+ if (REG_READ(ah, AR_Q_TXE) & (1 << q))
+ npend = 1;
+ }
+
+ return npend;
+}
+EXPORT_SYMBOL(ath9k_hw_numtxpending);
+
+/**
+ * ath9k_hw_updatetxtriglevel - adjusts the frame trigger level
+ *
+ * @ah: atheros hardware struct
+ * @bIncTrigLevel: whether or not the frame trigger level should be updated
+ *
+ * The frame trigger level specifies the minimum number of bytes,
+ * in units of 64 bytes, that must be DMA'ed into the PCU TX FIFO
+ * before the PCU will initiate sending the frame on the air. This can
+ * mean we initiate transmit before a full frame is on the PCU TX FIFO.
+ * Resets to 0x1 (meaning 64 bytes or a full frame, whichever occurs
+ * first)
+ *
+ * Caution must be taken to ensure to set the frame trigger level based
+ * on the DMA request size. For example if the DMA request size is set to
+ * 128 bytes the trigger level cannot exceed 6 * 64 = 384. This is because
+ * there need to be enough space in the tx FIFO for the requested transfer
+ * size. Hence the tx FIFO will stop with 512 - 128 = 384 bytes. If we set
+ * the threshold to a value beyond 6, then the transmit will hang.
+ *
+ * Current dual stream devices have a PCU TX FIFO size of 8 KB.
+ * Current single stream devices have a PCU TX FIFO size of 4 KB, however,
+ * there is a hardware issue which forces us to use 2 KB instead so the
+ * frame trigger level must not exceed 2 KB for these chipsets.
+ */
+bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel)
+{
+ u32 txcfg, curLevel, newLevel;
+
+ if (ah->tx_trig_level >= ah->config.max_txtrig_level)
+ return false;
+
+ ath9k_hw_disable_interrupts(ah);
+
+ txcfg = REG_READ(ah, AR_TXCFG);
+ curLevel = MS(txcfg, AR_FTRIG);
+ newLevel = curLevel;
+ if (bIncTrigLevel) {
+ if (curLevel < ah->config.max_txtrig_level)
+ newLevel++;
+ } else if (curLevel > MIN_TX_FIFO_THRESHOLD)
+ newLevel--;
+ if (newLevel != curLevel)
+ REG_WRITE(ah, AR_TXCFG,
+ (txcfg & ~AR_FTRIG) | SM(newLevel, AR_FTRIG));
+
+ ath9k_hw_enable_interrupts(ah);
+
+ ah->tx_trig_level = newLevel;
+
+ return newLevel != curLevel;
+}
+EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
+
+void ath9k_hw_abort_tx_dma(struct ath_hw *ah)
+{
+ int maxdelay = 1000;
+ int i, q;
+
+ if (ah->curchan) {
+ if (IS_CHAN_HALF_RATE(ah->curchan))
+ maxdelay *= 2;
+ else if (IS_CHAN_QUARTER_RATE(ah->curchan))
+ maxdelay *= 4;
+ }
+
+ REG_WRITE(ah, AR_Q_TXD, AR_Q_TXD_M);
+
+ REG_SET_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+ REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+ REG_SET_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
+
+ for (q = 0; q < AR_NUM_QCU; q++) {
+ for (i = 0; i < maxdelay; i++) {
+ if (i)
+ udelay(5);
+
+ if (!ath9k_hw_numtxpending(ah, q))
+ break;
+ }
+ }
+
+ REG_CLR_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+ REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+ REG_CLR_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
+
+ REG_WRITE(ah, AR_Q_TXD, 0);
+}
+EXPORT_SYMBOL(ath9k_hw_abort_tx_dma);
+
+bool ath9k_hw_stop_dma_queue(struct ath_hw *ah, u32 q)
+{
+#define ATH9K_TX_STOP_DMA_TIMEOUT 1000 /* usec */
+#define ATH9K_TIME_QUANTUM 100 /* usec */
+ int wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
+ int wait;
+
+ REG_WRITE(ah, AR_Q_TXD, 1 << q);
+
+ for (wait = wait_time; wait != 0; wait--) {
+ if (wait != wait_time)
+ udelay(ATH9K_TIME_QUANTUM);
+
+ if (ath9k_hw_numtxpending(ah, q) == 0)
+ break;
+ }
+
+ REG_WRITE(ah, AR_Q_TXD, 0);
+
+ return wait != 0;
+
+#undef ATH9K_TX_STOP_DMA_TIMEOUT
+#undef ATH9K_TIME_QUANTUM
+}
+EXPORT_SYMBOL(ath9k_hw_stop_dma_queue);
+
+bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
+ const struct ath9k_tx_queue_info *qinfo)
+{
+ u32 cw;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info *qi;
+
+ qi = &ah->txq[q];
+ if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
+ ath_dbg(common, QUEUE,
+ "Set TXQ properties, inactive queue: %u\n", q);
+ return false;
+ }
+
+ ath_dbg(common, QUEUE, "Set queue properties for: %u\n", q);
+
+ qi->tqi_ver = qinfo->tqi_ver;
+ qi->tqi_subtype = qinfo->tqi_subtype;
+ qi->tqi_qflags = qinfo->tqi_qflags;
+ qi->tqi_priority = qinfo->tqi_priority;
+ if (qinfo->tqi_aifs != ATH9K_TXQ_USEDEFAULT)
+ qi->tqi_aifs = min(qinfo->tqi_aifs, 255U);
+ else
+ qi->tqi_aifs = INIT_AIFS;
+ if (qinfo->tqi_cwmin != ATH9K_TXQ_USEDEFAULT) {
+ cw = min(qinfo->tqi_cwmin, 1024U);
+ qi->tqi_cwmin = 1;
+ while (qi->tqi_cwmin < cw)
+ qi->tqi_cwmin = (qi->tqi_cwmin << 1) | 1;
+ } else
+ qi->tqi_cwmin = qinfo->tqi_cwmin;
+ if (qinfo->tqi_cwmax != ATH9K_TXQ_USEDEFAULT) {
+ cw = min(qinfo->tqi_cwmax, 1024U);
+ qi->tqi_cwmax = 1;
+ while (qi->tqi_cwmax < cw)
+ qi->tqi_cwmax = (qi->tqi_cwmax << 1) | 1;
+ } else
+ qi->tqi_cwmax = INIT_CWMAX;
+
+ if (qinfo->tqi_shretry != 0)
+ qi->tqi_shretry = min((u32) qinfo->tqi_shretry, 15U);
+ else
+ qi->tqi_shretry = INIT_SH_RETRY;
+ if (qinfo->tqi_lgretry != 0)
+ qi->tqi_lgretry = min((u32) qinfo->tqi_lgretry, 15U);
+ else
+ qi->tqi_lgretry = INIT_LG_RETRY;
+ qi->tqi_cbrPeriod = qinfo->tqi_cbrPeriod;
+ qi->tqi_cbrOverflowLimit = qinfo->tqi_cbrOverflowLimit;
+ qi->tqi_burstTime = qinfo->tqi_burstTime;
+ qi->tqi_readyTime = qinfo->tqi_readyTime;
+
+ switch (qinfo->tqi_subtype) {
+ case ATH9K_WME_UPSD:
+ if (qi->tqi_type == ATH9K_TX_QUEUE_DATA)
+ qi->tqi_intFlags = ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS;
+ break;
+ default:
+ break;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL(ath9k_hw_set_txq_props);
+
+bool ath9k_hw_get_txq_props(struct ath_hw *ah, int q,
+ struct ath9k_tx_queue_info *qinfo)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info *qi;
+
+ qi = &ah->txq[q];
+ if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
+ ath_dbg(common, QUEUE,
+ "Get TXQ properties, inactive queue: %u\n", q);
+ return false;
+ }
+
+ qinfo->tqi_qflags = qi->tqi_qflags;
+ qinfo->tqi_ver = qi->tqi_ver;
+ qinfo->tqi_subtype = qi->tqi_subtype;
+ qinfo->tqi_qflags = qi->tqi_qflags;
+ qinfo->tqi_priority = qi->tqi_priority;
+ qinfo->tqi_aifs = qi->tqi_aifs;
+ qinfo->tqi_cwmin = qi->tqi_cwmin;
+ qinfo->tqi_cwmax = qi->tqi_cwmax;
+ qinfo->tqi_shretry = qi->tqi_shretry;
+ qinfo->tqi_lgretry = qi->tqi_lgretry;
+ qinfo->tqi_cbrPeriod = qi->tqi_cbrPeriod;
+ qinfo->tqi_cbrOverflowLimit = qi->tqi_cbrOverflowLimit;
+ qinfo->tqi_burstTime = qi->tqi_burstTime;
+ qinfo->tqi_readyTime = qi->tqi_readyTime;
+
+ return true;
+}
+EXPORT_SYMBOL(ath9k_hw_get_txq_props);
+
+int ath9k_hw_setuptxqueue(struct ath_hw *ah, enum ath9k_tx_queue type,
+ const struct ath9k_tx_queue_info *qinfo)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info *qi;
+ int q;
+
+ switch (type) {
+ case ATH9K_TX_QUEUE_BEACON:
+ q = ATH9K_NUM_TX_QUEUES - 1;
+ break;
+ case ATH9K_TX_QUEUE_CAB:
+ q = ATH9K_NUM_TX_QUEUES - 2;
+ break;
+ case ATH9K_TX_QUEUE_PSPOLL:
+ q = 1;
+ break;
+ case ATH9K_TX_QUEUE_UAPSD:
+ q = ATH9K_NUM_TX_QUEUES - 3;
+ break;
+ case ATH9K_TX_QUEUE_DATA:
+ q = qinfo->tqi_subtype;
+ break;
+ default:
+ ath_err(common, "Invalid TX queue type: %u\n", type);
+ return -1;
+ }
+
+ ath_dbg(common, QUEUE, "Setup TX queue: %u\n", q);
+
+ qi = &ah->txq[q];
+ if (qi->tqi_type != ATH9K_TX_QUEUE_INACTIVE) {
+ ath_err(common, "TX queue: %u already active\n", q);
+ return -1;
+ }
+ memset(qi, 0, sizeof(struct ath9k_tx_queue_info));
+ qi->tqi_type = type;
+ qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
+ (void) ath9k_hw_set_txq_props(ah, q, qinfo);
+
+ return q;
+}
+EXPORT_SYMBOL(ath9k_hw_setuptxqueue);
+
+static void ath9k_hw_clear_queue_interrupts(struct ath_hw *ah, u32 q)
+{
+ ah->txok_interrupt_mask &= ~(1 << q);
+ ah->txerr_interrupt_mask &= ~(1 << q);
+ ah->txdesc_interrupt_mask &= ~(1 << q);
+ ah->txeol_interrupt_mask &= ~(1 << q);
+ ah->txurn_interrupt_mask &= ~(1 << q);
+}
+
+bool ath9k_hw_releasetxqueue(struct ath_hw *ah, u32 q)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info *qi;
+
+ qi = &ah->txq[q];
+ if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
+ ath_dbg(common, QUEUE, "Release TXQ, inactive queue: %u\n", q);
+ return false;
+ }
+
+ ath_dbg(common, QUEUE, "Release TX queue: %u\n", q);
+
+ qi->tqi_type = ATH9K_TX_QUEUE_INACTIVE;
+ ath9k_hw_clear_queue_interrupts(ah, q);
+ ath9k_hw_set_txq_interrupts(ah, qi);
+
+ return true;
+}
+EXPORT_SYMBOL(ath9k_hw_releasetxqueue);
+
+bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info *qi;
+ u32 cwMin, chanCwMin, value;
+
+ qi = &ah->txq[q];
+ if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
+ ath_dbg(common, QUEUE, "Reset TXQ, inactive queue: %u\n", q);
+ return true;
+ }
+
+ ath_dbg(common, QUEUE, "Reset TX queue: %u\n", q);
+
+ if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
+ chanCwMin = INIT_CWMIN;
+
+ for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1);
+ } else
+ cwMin = qi->tqi_cwmin;
+
+ ENABLE_REGWRITE_BUFFER(ah);
+
+ REG_WRITE(ah, AR_DLCL_IFS(q),
+ SM(cwMin, AR_D_LCL_IFS_CWMIN) |
+ SM(qi->tqi_cwmax, AR_D_LCL_IFS_CWMAX) |
+ SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
+
+ REG_WRITE(ah, AR_DRETRY_LIMIT(q),
+ SM(INIT_SSH_RETRY, AR_D_RETRY_LIMIT_STA_SH) |
+ SM(INIT_SLG_RETRY, AR_D_RETRY_LIMIT_STA_LG) |
+ SM(qi->tqi_shretry, AR_D_RETRY_LIMIT_FR_SH));
+
+ REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
+
+ if (AR_SREV_9340(ah) && !AR_SREV_9340_13_OR_LATER(ah))
+ REG_WRITE(ah, AR_DMISC(q),
+ AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x1);
+ else
+ REG_WRITE(ah, AR_DMISC(q),
+ AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
+
+ if (qi->tqi_cbrPeriod) {
+ REG_WRITE(ah, AR_QCBRCFG(q),
+ SM(qi->tqi_cbrPeriod, AR_Q_CBRCFG_INTERVAL) |
+ SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_OVF_THRESH));
+ REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_FSP_CBR |
+ (qi->tqi_cbrOverflowLimit ?
+ AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
+ }
+ if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
+ REG_WRITE(ah, AR_QRDYTIMECFG(q),
+ SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_DURATION) |
+ AR_Q_RDYTIMECFG_EN);
+ }
+
+ REG_WRITE(ah, AR_DCHNTIME(q),
+ SM(qi->tqi_burstTime, AR_D_CHNTIME_DUR) |
+ (qi->tqi_burstTime ? AR_D_CHNTIME_EN : 0));
+
+ if (qi->tqi_burstTime
+ && (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE))
+ REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_RDYTIME_EXP_POLICY);
+
+ if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE)
+ REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
+
+ REGWRITE_BUFFER_FLUSH(ah);
+
+ if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
+ REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_FRAG_BKOFF_EN);
+
+ switch (qi->tqi_type) {
+ case ATH9K_TX_QUEUE_BEACON:
+ ENABLE_REGWRITE_BUFFER(ah);
+
+ REG_SET_BIT(ah, AR_QMISC(q),
+ AR_Q_MISC_FSP_DBA_GATED
+ | AR_Q_MISC_BEACON_USE
+ | AR_Q_MISC_CBR_INCR_DIS1);
+
+ REG_SET_BIT(ah, AR_DMISC(q),
+ (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
+ AR_D_MISC_ARB_LOCKOUT_CNTRL_S)
+ | AR_D_MISC_BEACON_USE
+ | AR_D_MISC_POST_FR_BKOFF_DIS);
+
+ REGWRITE_BUFFER_FLUSH(ah);
+
+ /*
+ * cwmin and cwmax should be 0 for beacon queue
+ * but not for IBSS as we would create an imbalance
+ * on beaconing fairness for participating nodes.
+ */
+ if (AR_SREV_9300_20_OR_LATER(ah) &&
+ ah->opmode != NL80211_IFTYPE_ADHOC) {
+ REG_WRITE(ah, AR_DLCL_IFS(q), SM(0, AR_D_LCL_IFS_CWMIN)
+ | SM(0, AR_D_LCL_IFS_CWMAX)
+ | SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
+ }
+ break;
+ case ATH9K_TX_QUEUE_CAB:
+ ENABLE_REGWRITE_BUFFER(ah);
+
+ REG_SET_BIT(ah, AR_QMISC(q),
+ AR_Q_MISC_FSP_DBA_GATED
+ | AR_Q_MISC_CBR_INCR_DIS1
+ | AR_Q_MISC_CBR_INCR_DIS0);
+ value = (qi->tqi_readyTime -
+ (ah->config.sw_beacon_response_time -
+ ah->config.dma_beacon_response_time)) * 1024;
+ REG_WRITE(ah, AR_QRDYTIMECFG(q),
+ value | AR_Q_RDYTIMECFG_EN);
+ REG_SET_BIT(ah, AR_DMISC(q),
+ (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
+ AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
+
+ REGWRITE_BUFFER_FLUSH(ah);
+
+ break;
+ case ATH9K_TX_QUEUE_PSPOLL:
+ REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_CBR_INCR_DIS1);
+ break;
+ case ATH9K_TX_QUEUE_UAPSD:
+ REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
+ break;
+ default:
+ break;
+ }
+
+ if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
+ REG_SET_BIT(ah, AR_DMISC(q),
+ SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
+ AR_D_MISC_ARB_LOCKOUT_CNTRL) |
+ AR_D_MISC_POST_FR_BKOFF_DIS);
+ }
+
+ if (AR_SREV_9300_20_OR_LATER(ah))
+ REG_WRITE(ah, AR_Q_DESC_CRCCHK, AR_Q_DESC_CRCCHK_EN);
+
+ ath9k_hw_clear_queue_interrupts(ah, q);
+ if (qi->tqi_qflags & TXQ_FLAG_TXINT_ENABLE) {
+ ah->txok_interrupt_mask |= 1 << q;
+ ah->txerr_interrupt_mask |= 1 << q;
+ }
+ if (qi->tqi_qflags & TXQ_FLAG_TXDESCINT_ENABLE)
+ ah->txdesc_interrupt_mask |= 1 << q;
+ if (qi->tqi_qflags & TXQ_FLAG_TXEOLINT_ENABLE)
+ ah->txeol_interrupt_mask |= 1 << q;
+ if (qi->tqi_qflags & TXQ_FLAG_TXURNINT_ENABLE)
+ ah->txurn_interrupt_mask |= 1 << q;
+ ath9k_hw_set_txq_interrupts(ah, qi);
+
+ return true;
+}
+EXPORT_SYMBOL(ath9k_hw_resettxqueue);
+
+int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
+ struct ath_rx_status *rs)
+{
+ struct ar5416_desc ads;
+ struct ar5416_desc *adsp = AR5416DESC(ds);
+ u32 phyerr;
+
+ if ((adsp->ds_rxstatus8 & AR_RxDone) == 0)
+ return -EINPROGRESS;
+
+ ads.u.rx = adsp->u.rx;
+
+ rs->rs_status = 0;
+ rs->rs_flags = 0;
+ rs->flag = 0;
+
+ rs->rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
+ rs->rs_tstamp = ads.AR_RcvTimestamp;
+
+ if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
+ rs->rs_rssi = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
+ rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
+ } else {
+ rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
+ rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt00);
+ rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt01);
+ rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt02);
+ rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt10);
+ rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt11);
+ rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt12);
+ }
+ if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
+ rs->rs_keyix = MS(ads.ds_rxstatus8, AR_KeyIdx);
+ else
+ rs->rs_keyix = ATH9K_RXKEYIX_INVALID;
+
+ rs->rs_rate = MS(ads.ds_rxstatus0, AR_RxRate);
+ rs->rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
+
+ rs->rs_firstaggr = (ads.ds_rxstatus8 & AR_RxFirstAggr) ? 1 : 0;
+ rs->rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
+ rs->rs_moreaggr = (ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
+ rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
+
+ /* directly mapped flags for ieee80211_rx_status */
+ rs->flag |=
+ (ads.ds_rxstatus3 & AR_GI) ? RX_FLAG_SHORT_GI : 0;
+ rs->flag |=
+ (ads.ds_rxstatus3 & AR_2040) ? RX_FLAG_40MHZ : 0;
+ if (AR_SREV_9280_20_OR_LATER(ah))
+ rs->flag |=
+ (ads.ds_rxstatus3 & AR_STBC) ?
+ /* we can only Nss=1 STBC */
+ (1 << RX_FLAG_STBC_SHIFT) : 0;
+
+ if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
+ rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
+ if (ads.ds_rxstatus8 & AR_PostDelimCRCErr)
+ rs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
+ if (ads.ds_rxstatus8 & AR_DecryptBusyErr)
+ rs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
+
+ if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
+ /*
+ * Treat these errors as mutually exclusive to avoid spurious
+ * extra error reports from the hardware. If a CRC error is
+ * reported, then decryption and MIC errors are irrelevant,
+ * the frame is going to be dropped either way
+ */
+ if (ads.ds_rxstatus8 & AR_PHYErr) {
+ rs->rs_status |= ATH9K_RXERR_PHY;
+ phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
+ rs->rs_phyerr = phyerr;
+ } else if (ads.ds_rxstatus8 & AR_CRCErr)
+ rs->rs_status |= ATH9K_RXERR_CRC;
+ else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
+ rs->rs_status |= ATH9K_RXERR_DECRYPT;
+ else if (ads.ds_rxstatus8 & AR_MichaelErr)
+ rs->rs_status |= ATH9K_RXERR_MIC;
+ } else {
+ if (ads.ds_rxstatus8 &
+ (AR_CRCErr | AR_PHYErr | AR_DecryptCRCErr | AR_MichaelErr))
+ rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
+
+ /* Only up to MCS16 supported, everything above is invalid */
+ if (rs->rs_rate >= 0x90)
+ rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
+ }
+
+ if (ads.ds_rxstatus8 & AR_KeyMiss)
+ rs->rs_status |= ATH9K_RXERR_KEYMISS;
+
+ return 0;
+}
+EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
+
+/*
+ * This can stop or re-enables RX.
+ *
+ * If bool is set this will kill any frame which is currently being
+ * transferred between the MAC and baseband and also prevent any new
+ * frames from getting started.
+ */
+bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)
+{
+ u32 reg;
+
+ if (set) {
+ REG_SET_BIT(ah, AR_DIAG_SW,
+ (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
+
+ if (!ath9k_hw_wait(ah, AR_OBS_BUS_1, AR_OBS_BUS_1_RX_STATE,
+ 0, AH_WAIT_TIMEOUT)) {
+ REG_CLR_BIT(ah, AR_DIAG_SW,
+ (AR_DIAG_RX_DIS |
+ AR_DIAG_RX_ABORT));
+
+ reg = REG_READ(ah, AR_OBS_BUS_1);
+ ath_err(ath9k_hw_common(ah),
+ "RX failed to go idle in 10 ms RXSM=0x%x\n",
+ reg);
+
+ return false;
+ }
+ } else {
+ REG_CLR_BIT(ah, AR_DIAG_SW,
+ (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
+ }
+
+ return true;
+}
+EXPORT_SYMBOL(ath9k_hw_setrxabort);
+
+void ath9k_hw_putrxbuf(struct ath_hw *ah, u32 rxdp)
+{
+ REG_WRITE(ah, AR_RXDP, rxdp);
+}
+EXPORT_SYMBOL(ath9k_hw_putrxbuf);
+
+void ath9k_hw_startpcureceive(struct ath_hw *ah, bool is_scanning)
+{
+ ath9k_enable_mib_counters(ah);
+
+ ath9k_ani_reset(ah, is_scanning);
+
+ REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
+}
+EXPORT_SYMBOL(ath9k_hw_startpcureceive);
+
+void ath9k_hw_abortpcurecv(struct ath_hw *ah)
+{
+ REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS);
+
+ ath9k_hw_disable_mib_counters(ah);
+}
+EXPORT_SYMBOL(ath9k_hw_abortpcurecv);
+
+bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
+{
+#define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
+ struct ath_common *common = ath9k_hw_common(ah);
+ u32 mac_status, last_mac_status = 0;
+ int i;
+
+ /* Enable access to the DMA observation bus */
+ REG_WRITE(ah, AR_MACMISC,
+ ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
+ (AR_MACMISC_MISC_OBS_BUS_1 <<
+ AR_MACMISC_MISC_OBS_BUS_MSB_S)));
+
+ REG_WRITE(ah, AR_CR, AR_CR_RXD);
+
+ /* Wait for rx enable bit to go low */
+ for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
+ if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
+ break;
+
+ if (!AR_SREV_9300_20_OR_LATER(ah)) {
+ mac_status = REG_READ(ah, AR_DMADBG_7) & 0x7f0;
+ if (mac_status == 0x1c0 && mac_status == last_mac_status) {
+ *reset = true;
+ break;
+ }
+
+ last_mac_status = mac_status;
+ }
+
+ udelay(AH_TIME_QUANTUM);
+ }
+
+ if (i == 0) {
+ ath_err(common,
+ "DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
+ AH_RX_STOP_DMA_TIMEOUT / 1000,
+ REG_READ(ah, AR_CR),
+ REG_READ(ah, AR_DIAG_SW),
+ REG_READ(ah, AR_DMADBG_7));
+ return false;
+ } else {
+ return true;
+ }
+
+#undef AH_RX_STOP_DMA_TIMEOUT
+}
+EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
+
+int ath9k_hw_beaconq_setup(struct ath_hw *ah)
+{
+ struct ath9k_tx_queue_info qi;
+
+ memset(&qi, 0, sizeof(qi));
+ qi.tqi_aifs = 1;
+ qi.tqi_cwmin = 0;
+ qi.tqi_cwmax = 0;
+
+ if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
+ qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE;
+
+ return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
+}
+EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
+
+bool ath9k_hw_intrpend(struct ath_hw *ah)
+{
+ u32 host_isr;
+
+ if (AR_SREV_9100(ah))
+ return true;
+
+ host_isr = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
+
+ if (((host_isr & AR_INTR_MAC_IRQ) ||
+ (host_isr & AR_INTR_ASYNC_MASK_MCI)) &&
+ (host_isr != AR_INTR_SPURIOUS))
+ return true;
+
+ host_isr = REG_READ(ah, AR_INTR_SYNC_CAUSE);
+ if ((host_isr & AR_INTR_SYNC_DEFAULT)
+ && (host_isr != AR_INTR_SPURIOUS))
+ return true;
+
+ return false;
+}
+EXPORT_SYMBOL(ath9k_hw_intrpend);
+
+void ath9k_hw_kill_interrupts(struct ath_hw *ah)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ ath_dbg(common, INTERRUPT, "disable IER\n");
+ REG_WRITE(ah, AR_IER, AR_IER_DISABLE);
+ (void) REG_READ(ah, AR_IER);
+ if (!AR_SREV_9100(ah)) {
+ REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0);
+ (void) REG_READ(ah, AR_INTR_ASYNC_ENABLE);
+
+ REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);
+ (void) REG_READ(ah, AR_INTR_SYNC_ENABLE);
+ }
+}
+EXPORT_SYMBOL(ath9k_hw_kill_interrupts);
+
+void ath9k_hw_disable_interrupts(struct ath_hw *ah)
+{
+ if (!(ah->imask & ATH9K_INT_GLOBAL))
+ atomic_set(&ah->intr_ref_cnt, -1);
+ else
+ atomic_dec(&ah->intr_ref_cnt);
+
+ ath9k_hw_kill_interrupts(ah);
+}
+EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
+
+static void __ath9k_hw_enable_interrupts(struct ath_hw *ah)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ u32 sync_default = AR_INTR_SYNC_DEFAULT;
+ u32 async_mask;
+
+ if (AR_SREV_9340(ah) || AR_SREV_9550(ah) || AR_SREV_9531(ah) ||
+ AR_SREV_9561(ah))
+ sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;
+
+ async_mask = AR_INTR_MAC_IRQ;
+
+ if (ah->imask & ATH9K_INT_MCI)
+ async_mask |= AR_INTR_ASYNC_MASK_MCI;
+
+ ath_dbg(common, INTERRUPT, "enable IER\n");
+ REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
+ if (!AR_SREV_9100(ah)) {
+ REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, async_mask);
+ REG_WRITE(ah, AR_INTR_ASYNC_MASK, async_mask);
+
+ REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
+ REG_WRITE(ah, AR_INTR_SYNC_MASK, sync_default);
+ }
+ ath_dbg(common, INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
+ REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
+}
+
+void ath9k_hw_resume_interrupts(struct ath_hw *ah)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ if (!(ah->imask & ATH9K_INT_GLOBAL))
+ return;
+
+ if (atomic_read(&ah->intr_ref_cnt) != 0) {
+ ath_dbg(common, INTERRUPT, "Do not enable IER ref count %d\n",
+ atomic_read(&ah->intr_ref_cnt));
+ return;
+ }
+
+ __ath9k_hw_enable_interrupts(ah);
+}
+EXPORT_SYMBOL(ath9k_hw_resume_interrupts);
+
+void ath9k_hw_enable_interrupts(struct ath_hw *ah)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ if (!(ah->imask & ATH9K_INT_GLOBAL))
+ return;
+
+ if (!atomic_inc_and_test(&ah->intr_ref_cnt)) {
+ ath_dbg(common, INTERRUPT, "Do not enable IER ref count %d\n",
+ atomic_read(&ah->intr_ref_cnt));
+ return;
+ }
+
+ __ath9k_hw_enable_interrupts(ah);
+}
+EXPORT_SYMBOL(ath9k_hw_enable_interrupts);
+
+void ath9k_hw_set_interrupts(struct ath_hw *ah)
+{
+ enum ath9k_int ints = ah->imask;
+ u32 mask, mask2;
+ struct ath9k_hw_capabilities *pCap = &ah->caps;
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ if (!(ints & ATH9K_INT_GLOBAL))
+ ath9k_hw_disable_interrupts(ah);
+
+ ath_dbg(common, INTERRUPT, "New interrupt mask 0x%x\n", ints);
+
+ mask = ints & ATH9K_INT_COMMON;
+ mask2 = 0;
+
+ if (ints & ATH9K_INT_TX) {
+ if (ah->config.tx_intr_mitigation)
+ mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
+ else {
+ if (ah->txok_interrupt_mask)
+ mask |= AR_IMR_TXOK;
+ if (ah->txdesc_interrupt_mask)
+ mask |= AR_IMR_TXDESC;
+ }
+ if (ah->txerr_interrupt_mask)
+ mask |= AR_IMR_TXERR;
+ if (ah->txeol_interrupt_mask)
+ mask |= AR_IMR_TXEOL;
+ }
+ if (ints & ATH9K_INT_RX) {
+ if (AR_SREV_9300_20_OR_LATER(ah)) {
+ mask |= AR_IMR_RXERR | AR_IMR_RXOK_HP;
+ if (ah->config.rx_intr_mitigation) {
+ mask &= ~AR_IMR_RXOK_LP;
+ mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
+ } else {
+ mask |= AR_IMR_RXOK_LP;
+ }
+ } else {
+ if (ah->config.rx_intr_mitigation)
+ mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
+ else
+ mask |= AR_IMR_RXOK | AR_IMR_RXDESC;
+ }
+ if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
+ mask |= AR_IMR_GENTMR;
+ }
+
+ if (ints & ATH9K_INT_GENTIMER)
+ mask |= AR_IMR_GENTMR;
+
+ if (ints & (ATH9K_INT_BMISC)) {
+ mask |= AR_IMR_BCNMISC;
+ if (ints & ATH9K_INT_TIM)
+ mask2 |= AR_IMR_S2_TIM;
+ if (ints & ATH9K_INT_DTIM)
+ mask2 |= AR_IMR_S2_DTIM;
+ if (ints & ATH9K_INT_DTIMSYNC)
+ mask2 |= AR_IMR_S2_DTIMSYNC;
+ if (ints & ATH9K_INT_CABEND)
+ mask2 |= AR_IMR_S2_CABEND;
+ if (ints & ATH9K_INT_TSFOOR)
+ mask2 |= AR_IMR_S2_TSFOOR;
+ }
+
+ if (ints & (ATH9K_INT_GTT | ATH9K_INT_CST)) {
+ mask |= AR_IMR_BCNMISC;
+ if (ints & ATH9K_INT_GTT)
+ mask2 |= AR_IMR_S2_GTT;
+ if (ints & ATH9K_INT_CST)
+ mask2 |= AR_IMR_S2_CST;
+ }
+
+ if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+ if (ints & ATH9K_INT_BB_WATCHDOG) {
+ mask |= AR_IMR_BCNMISC;
+ mask2 |= AR_IMR_S2_BB_WATCHDOG;
+ }
+ }
+
+ ath_dbg(common, INTERRUPT, "new IMR 0x%x\n", mask);
+ REG_WRITE(ah, AR_IMR, mask);
+ ah->imrs2_reg &= ~(AR_IMR_S2_TIM |
+ AR_IMR_S2_DTIM |
+ AR_IMR_S2_DTIMSYNC |
+ AR_IMR_S2_CABEND |
+ AR_IMR_S2_CABTO |
+ AR_IMR_S2_TSFOOR |
+ AR_IMR_S2_GTT |
+ AR_IMR_S2_CST);
+
+ if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+ if (ints & ATH9K_INT_BB_WATCHDOG)
+ ah->imrs2_reg &= ~AR_IMR_S2_BB_WATCHDOG;
+ }
+
+ ah->imrs2_reg |= mask2;
+ REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
+
+ if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
+ if (ints & ATH9K_INT_TIM_TIMER)
+ REG_SET_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
+ else
+ REG_CLR_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
+ }
+
+ return;
+}
+EXPORT_SYMBOL(ath9k_hw_set_interrupts);
+
+#define ATH9K_HW_MAX_DCU 10
+#define ATH9K_HW_SLICE_PER_DCU 16
+#define ATH9K_HW_BIT_IN_SLICE 16
+void ath9k_hw_set_tx_filter(struct ath_hw *ah, u8 destidx, bool set)
+{
+ int dcu_idx;
+ u32 filter;
+
+ for (dcu_idx = 0; dcu_idx < 10; dcu_idx++) {
+ filter = SM(set, AR_D_TXBLK_WRITE_COMMAND);
+ filter |= SM(dcu_idx, AR_D_TXBLK_WRITE_DCU);
+ filter |= SM((destidx / ATH9K_HW_SLICE_PER_DCU),
+ AR_D_TXBLK_WRITE_SLICE);
+ filter |= BIT(destidx % ATH9K_HW_BIT_IN_SLICE);
+ ath_dbg(ath9k_hw_common(ah), PS,
+ "DCU%d staid %d set %d txfilter %08x\n",
+ dcu_idx, destidx, set, filter);
+ REG_WRITE(ah, AR_D_TXBLK_BASE, filter);
+ }
+}
+EXPORT_SYMBOL(ath9k_hw_set_tx_filter);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-25 09:21:05 +0000