summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ath/ath5k/qcu.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/qcu.c')
-rw-r--r--drivers/net/wireless/ath/ath5k/qcu.c696
1 files changed, 414 insertions, 282 deletions
diff --git a/drivers/net/wireless/ath/ath5k/qcu.c b/drivers/net/wireless/ath/ath5k/qcu.c
index 84c717ded1c5..2c9c9e793d4e 100644
--- a/drivers/net/wireless/ath/ath5k/qcu.c
+++ b/drivers/net/wireless/ath/ath5k/qcu.c
@@ -25,14 +25,52 @@ Queue Control Unit, DFS Control Unit Functions
#include "debug.h"
#include "base.h"
+
+/******************\
+* Helper functions *
+\******************/
+
/*
- * Get properties for a transmit queue
+ * Get number of pending frames
+ * for a specific queue [5211+]
*/
-int ath5k_hw_get_tx_queueprops(struct ath5k_hw *ah, int queue,
- struct ath5k_txq_info *queue_info)
+u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue)
{
- memcpy(queue_info, &ah->ah_txq[queue], sizeof(struct ath5k_txq_info));
- return 0;
+ u32 pending;
+ AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
+
+ /* Return if queue is declared inactive */
+ if (ah->ah_txq[queue].tqi_type == AR5K_TX_QUEUE_INACTIVE)
+ return false;
+
+ /* XXX: How about AR5K_CFG_TXCNT ? */
+ if (ah->ah_version == AR5K_AR5210)
+ return false;
+
+ pending = ath5k_hw_reg_read(ah, AR5K_QUEUE_STATUS(queue));
+ pending &= AR5K_QCU_STS_FRMPENDCNT;
+
+ /* It's possible to have no frames pending even if TXE
+ * is set. To indicate that q has not stopped return
+ * true */
+ if (!pending && AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, queue))
+ return true;
+
+ return pending;
+}
+
+/*
+ * Set a transmit queue inactive
+ */
+void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue)
+{
+ if (WARN_ON(queue >= ah->ah_capabilities.cap_queues.q_tx_num))
+ return;
+
+ /* This queue will be skipped in further operations */
+ ah->ah_txq[queue].tqi_type = AR5K_TX_QUEUE_INACTIVE;
+ /*For SIMR setup*/
+ AR5K_Q_DISABLE_BITS(ah->ah_txq_status, queue);
}
/*
@@ -50,6 +88,16 @@ static u16 ath5k_cw_validate(u16 cw_req)
}
/*
+ * Get properties for a transmit queue
+ */
+int ath5k_hw_get_tx_queueprops(struct ath5k_hw *ah, int queue,
+ struct ath5k_txq_info *queue_info)
+{
+ memcpy(queue_info, &ah->ah_txq[queue], sizeof(struct ath5k_txq_info));
+ return 0;
+}
+
+/*
* Set properties for a transmit queue
*/
int ath5k_hw_set_tx_queueprops(struct ath5k_hw *ah, int queue,
@@ -104,8 +152,8 @@ int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type,
/*
* Get queue by type
*/
- /*5210 only has 2 queues*/
- if (ah->ah_version == AR5K_AR5210) {
+ /* 5210 only has 2 queues */
+ if (ah->ah_capabilities.cap_queues.q_tx_num == 2) {
switch (queue_type) {
case AR5K_TX_QUEUE_DATA:
queue = AR5K_TX_QUEUE_ID_NOQCU_DATA;
@@ -172,113 +220,18 @@ int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type,
return queue;
}
-/*
- * Get number of pending frames
- * for a specific queue [5211+]
- */
-u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue)
-{
- u32 pending;
- AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
-
- /* Return if queue is declared inactive */
- if (ah->ah_txq[queue].tqi_type == AR5K_TX_QUEUE_INACTIVE)
- return false;
-
- /* XXX: How about AR5K_CFG_TXCNT ? */
- if (ah->ah_version == AR5K_AR5210)
- return false;
-
- pending = ath5k_hw_reg_read(ah, AR5K_QUEUE_STATUS(queue));
- pending &= AR5K_QCU_STS_FRMPENDCNT;
-
- /* It's possible to have no frames pending even if TXE
- * is set. To indicate that q has not stopped return
- * true */
- if (!pending && AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, queue))
- return true;
-
- return pending;
-}
-
-/*
- * Set a transmit queue inactive
- */
-void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue)
-{
- if (WARN_ON(queue >= ah->ah_capabilities.cap_queues.q_tx_num))
- return;
- /* This queue will be skipped in further operations */
- ah->ah_txq[queue].tqi_type = AR5K_TX_QUEUE_INACTIVE;
- /*For SIMR setup*/
- AR5K_Q_DISABLE_BITS(ah->ah_txq_status, queue);
-}
+/*******************************\
+* Single QCU/DCU initialization *
+\*******************************/
/*
- * Set DFS properties for a transmit queue on DCU
+ * Set tx retry limits on DCU
*/
-int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
+static void ath5k_hw_set_tx_retry_limits(struct ath5k_hw *ah,
+ unsigned int queue)
{
u32 retry_lg, retry_sh;
- struct ath5k_txq_info *tq = &ah->ah_txq[queue];
-
- AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
-
- tq = &ah->ah_txq[queue];
-
- if (tq->tqi_type == AR5K_TX_QUEUE_INACTIVE)
- return 0;
-
- if (ah->ah_version == AR5K_AR5210) {
- /* Only handle data queues, others will be ignored */
- if (tq->tqi_type != AR5K_TX_QUEUE_DATA)
- return 0;
-
- /* Set Slot time */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- AR5K_INIT_SLOT_TIME_TURBO : AR5K_INIT_SLOT_TIME,
- AR5K_SLOT_TIME);
- /* Set ACK_CTS timeout */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- AR5K_INIT_ACK_CTS_TIMEOUT_TURBO :
- AR5K_INIT_ACK_CTS_TIMEOUT, AR5K_SLOT_TIME);
- /* Set Transmit Latency */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- AR5K_INIT_TRANSMIT_LATENCY_TURBO :
- AR5K_INIT_TRANSMIT_LATENCY, AR5K_USEC_5210);
-
- /* Set IFS0 */
- if (ah->ah_turbo) {
- ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_TURBO +
- tq->tqi_aifs * AR5K_INIT_SLOT_TIME_TURBO) <<
- AR5K_IFS0_DIFS_S) | AR5K_INIT_SIFS_TURBO,
- AR5K_IFS0);
- } else {
- ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS +
- tq->tqi_aifs * AR5K_INIT_SLOT_TIME) <<
- AR5K_IFS0_DIFS_S) |
- AR5K_INIT_SIFS, AR5K_IFS0);
- }
-
- /* Set IFS1 */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- AR5K_INIT_PROTO_TIME_CNTRL_TURBO :
- AR5K_INIT_PROTO_TIME_CNTRL, AR5K_IFS1);
- /* Set AR5K_PHY_SETTLING */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- (ath5k_hw_reg_read(ah, AR5K_PHY_SETTLING) & ~0x7F)
- | 0x38 :
- (ath5k_hw_reg_read(ah, AR5K_PHY_SETTLING) & ~0x7F)
- | 0x1C,
- AR5K_PHY_SETTLING);
- /* Set Frame Control Register */
- ath5k_hw_reg_write(ah, ah->ah_turbo ?
- (AR5K_PHY_FRAME_CTL_INI | AR5K_PHY_TURBO_MODE |
- AR5K_PHY_TURBO_SHORT | 0x2020) :
- (AR5K_PHY_FRAME_CTL_INI | 0x1020),
- AR5K_PHY_FRAME_CTL_5210);
- }
/*
* Calculate and set retry limits
@@ -293,8 +246,13 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
retry_sh = AR5K_INIT_SH_RETRY;
}
- /*No QCU/DCU [5210]*/
+ /* Single data queue on AR5210 */
if (ah->ah_version == AR5K_AR5210) {
+ struct ath5k_txq_info *tq = &ah->ah_txq[queue];
+
+ if (queue > 0)
+ return;
+
ath5k_hw_reg_write(ah,
(tq->tqi_cw_min << AR5K_NODCU_RETRY_LMT_CW_MIN_S)
| AR5K_REG_SM(AR5K_INIT_SLG_RETRY,
@@ -304,8 +262,8 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
| AR5K_REG_SM(retry_lg, AR5K_NODCU_RETRY_LMT_LG_RETRY)
| AR5K_REG_SM(retry_sh, AR5K_NODCU_RETRY_LMT_SH_RETRY),
AR5K_NODCU_RETRY_LMT);
+ /* DCU on AR5211+ */
} else {
- /*QCU/DCU [5211+]*/
ath5k_hw_reg_write(ah,
AR5K_REG_SM(AR5K_INIT_SLG_RETRY,
AR5K_DCU_RETRY_LMT_SLG_RETRY) |
@@ -314,219 +272,393 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
AR5K_REG_SM(retry_lg, AR5K_DCU_RETRY_LMT_LG_RETRY) |
AR5K_REG_SM(retry_sh, AR5K_DCU_RETRY_LMT_SH_RETRY),
AR5K_QUEUE_DFS_RETRY_LIMIT(queue));
+ }
+ return;
+}
- /*===Rest is also for QCU/DCU only [5211+]===*/
+/**
+ * ath5k_hw_reset_tx_queue - Initialize a single hw queue
+ *
+ * @ah The &struct ath5k_hw
+ * @queue The hw queue number
+ *
+ * Set DFS properties for the given transmit queue on DCU
+ * and configures all queue-specific parameters.
+ */
+int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
+{
+ struct ath5k_txq_info *tq = &ah->ah_txq[queue];
- /*
- * Set contention window (cw_min/cw_max)
- * and arbitrated interframe space (aifs)...
- */
- ath5k_hw_reg_write(ah,
- AR5K_REG_SM(tq->tqi_cw_min, AR5K_DCU_LCL_IFS_CW_MIN) |
- AR5K_REG_SM(tq->tqi_cw_max, AR5K_DCU_LCL_IFS_CW_MAX) |
- AR5K_REG_SM(tq->tqi_aifs, AR5K_DCU_LCL_IFS_AIFS),
- AR5K_QUEUE_DFS_LOCAL_IFS(queue));
-
- /*
- * Set misc registers
- */
- /* Enable DCU early termination for this queue */
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
- AR5K_QCU_MISC_DCU_EARLY);
+ AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
+
+ tq = &ah->ah_txq[queue];
+
+ /* Skip if queue inactive or if we are on AR5210
+ * that doesn't have QCU/DCU */
+ if ((ah->ah_version == AR5K_AR5210) ||
+ (tq->tqi_type == AR5K_TX_QUEUE_INACTIVE))
+ return 0;
+
+ /*
+ * Set contention window (cw_min/cw_max)
+ * and arbitrated interframe space (aifs)...
+ */
+ ath5k_hw_reg_write(ah,
+ AR5K_REG_SM(tq->tqi_cw_min, AR5K_DCU_LCL_IFS_CW_MIN) |
+ AR5K_REG_SM(tq->tqi_cw_max, AR5K_DCU_LCL_IFS_CW_MAX) |
+ AR5K_REG_SM(tq->tqi_aifs, AR5K_DCU_LCL_IFS_AIFS),
+ AR5K_QUEUE_DFS_LOCAL_IFS(queue));
+
+ /*
+ * Set tx retry limits for this queue
+ */
+ ath5k_hw_set_tx_retry_limits(ah, queue);
+
+
+ /*
+ * Set misc registers
+ */
+
+ /* Enable DCU to wait for next fragment from QCU */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
+ AR5K_DCU_MISC_FRAG_WAIT);
- /* Enable DCU to wait for next fragment from QCU */
+ /* On Maui and Spirit use the global seqnum on DCU */
+ if (ah->ah_mac_version < AR5K_SREV_AR5211)
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
- AR5K_DCU_MISC_FRAG_WAIT);
-
- /* On Maui and Spirit use the global seqnum on DCU */
- if (ah->ah_mac_version < AR5K_SREV_AR5211)
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
- AR5K_DCU_MISC_SEQNUM_CTL);
-
- if (tq->tqi_cbr_period) {
- ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_cbr_period,
- AR5K_QCU_CBRCFG_INTVAL) |
- AR5K_REG_SM(tq->tqi_cbr_overflow_limit,
- AR5K_QCU_CBRCFG_ORN_THRES),
- AR5K_QUEUE_CBRCFG(queue));
+ AR5K_DCU_MISC_SEQNUM_CTL);
+
+ /* Constant bit rate period */
+ if (tq->tqi_cbr_period) {
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_cbr_period,
+ AR5K_QCU_CBRCFG_INTVAL) |
+ AR5K_REG_SM(tq->tqi_cbr_overflow_limit,
+ AR5K_QCU_CBRCFG_ORN_THRES),
+ AR5K_QUEUE_CBRCFG(queue));
+
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_FRSHED_CBR);
+
+ if (tq->tqi_cbr_overflow_limit)
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
- AR5K_QCU_MISC_FRSHED_CBR);
- if (tq->tqi_cbr_overflow_limit)
- AR5K_REG_ENABLE_BITS(ah,
- AR5K_QUEUE_MISC(queue),
AR5K_QCU_MISC_CBR_THRES_ENABLE);
- }
+ }
- if (tq->tqi_ready_time &&
- (tq->tqi_type != AR5K_TX_QUEUE_CAB))
- ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_ready_time,
- AR5K_QCU_RDYTIMECFG_INTVAL) |
- AR5K_QCU_RDYTIMECFG_ENABLE,
- AR5K_QUEUE_RDYTIMECFG(queue));
-
- if (tq->tqi_burst_time) {
- ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_burst_time,
- AR5K_DCU_CHAN_TIME_DUR) |
- AR5K_DCU_CHAN_TIME_ENABLE,
- AR5K_QUEUE_DFS_CHANNEL_TIME(queue));
-
- if (tq->tqi_flags
- & AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)
- AR5K_REG_ENABLE_BITS(ah,
- AR5K_QUEUE_MISC(queue),
+ /* Ready time interval */
+ if (tq->tqi_ready_time && (tq->tqi_type != AR5K_TX_QUEUE_CAB))
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_ready_time,
+ AR5K_QCU_RDYTIMECFG_INTVAL) |
+ AR5K_QCU_RDYTIMECFG_ENABLE,
+ AR5K_QUEUE_RDYTIMECFG(queue));
+
+ if (tq->tqi_burst_time) {
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_burst_time,
+ AR5K_DCU_CHAN_TIME_DUR) |
+ AR5K_DCU_CHAN_TIME_ENABLE,
+ AR5K_QUEUE_DFS_CHANNEL_TIME(queue));
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
AR5K_QCU_MISC_RDY_VEOL_POLICY);
- }
+ }
- if (tq->tqi_flags & AR5K_TXQ_FLAG_BACKOFF_DISABLE)
- ath5k_hw_reg_write(ah, AR5K_DCU_MISC_POST_FR_BKOFF_DIS,
- AR5K_QUEUE_DFS_MISC(queue));
+ /* Enable/disable Post frame backoff */
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_BACKOFF_DISABLE)
+ ath5k_hw_reg_write(ah, AR5K_DCU_MISC_POST_FR_BKOFF_DIS,
+ AR5K_QUEUE_DFS_MISC(queue));
- if (tq->tqi_flags & AR5K_TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
- ath5k_hw_reg_write(ah, AR5K_DCU_MISC_BACKOFF_FRAG,
- AR5K_QUEUE_DFS_MISC(queue));
+ /* Enable/disable fragmentation burst backoff */
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
+ ath5k_hw_reg_write(ah, AR5K_DCU_MISC_BACKOFF_FRAG,
+ AR5K_QUEUE_DFS_MISC(queue));
- /*
- * Set registers by queue type
- */
- switch (tq->tqi_type) {
- case AR5K_TX_QUEUE_BEACON:
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ /*
+ * Set registers by queue type
+ */
+ switch (tq->tqi_type) {
+ case AR5K_TX_QUEUE_BEACON:
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
AR5K_QCU_MISC_FRSHED_DBA_GT |
AR5K_QCU_MISC_CBREXP_BCN_DIS |
AR5K_QCU_MISC_BCN_ENABLE);
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
(AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<
AR5K_DCU_MISC_ARBLOCK_CTL_S) |
AR5K_DCU_MISC_ARBLOCK_IGNORE |
AR5K_DCU_MISC_POST_FR_BKOFF_DIS |
AR5K_DCU_MISC_BCN_ENABLE);
- break;
+ break;
- case AR5K_TX_QUEUE_CAB:
- /* XXX: use BCN_SENT_GT, if we can figure out how */
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
- AR5K_QCU_MISC_FRSHED_DBA_GT |
- AR5K_QCU_MISC_CBREXP_DIS |
- AR5K_QCU_MISC_CBREXP_BCN_DIS);
+ case AR5K_TX_QUEUE_CAB:
+ /* XXX: use BCN_SENT_GT, if we can figure out how */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_FRSHED_DBA_GT |
+ AR5K_QCU_MISC_CBREXP_DIS |
+ AR5K_QCU_MISC_CBREXP_BCN_DIS);
- ath5k_hw_reg_write(ah, ((tq->tqi_ready_time -
- (AR5K_TUNE_SW_BEACON_RESP -
- AR5K_TUNE_DMA_BEACON_RESP) -
+ ath5k_hw_reg_write(ah, ((tq->tqi_ready_time -
+ (AR5K_TUNE_SW_BEACON_RESP -
+ AR5K_TUNE_DMA_BEACON_RESP) -
AR5K_TUNE_ADDITIONAL_SWBA_BACKOFF) * 1024) |
- AR5K_QCU_RDYTIMECFG_ENABLE,
- AR5K_QUEUE_RDYTIMECFG(queue));
+ AR5K_QCU_RDYTIMECFG_ENABLE,
+ AR5K_QUEUE_RDYTIMECFG(queue));
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
- (AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<
- AR5K_DCU_MISC_ARBLOCK_CTL_S));
- break;
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
+ (AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<
+ AR5K_DCU_MISC_ARBLOCK_CTL_S));
+ break;
- case AR5K_TX_QUEUE_UAPSD:
- AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
- AR5K_QCU_MISC_CBREXP_DIS);
- break;
+ case AR5K_TX_QUEUE_UAPSD:
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_CBREXP_DIS);
+ break;
- case AR5K_TX_QUEUE_DATA:
- default:
+ case AR5K_TX_QUEUE_DATA:
+ default:
break;
- }
-
- /* TODO: Handle frame compression */
-
- /*
- * Enable interrupts for this tx queue
- * in the secondary interrupt mask registers
- */
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXOKINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txok, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXERRINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txerr, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXURNINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txurn, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXDESCINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txdesc, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXEOLINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txeol, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRORNINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrorn, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRURNINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrurn, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_QTRIGINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_qtrig, queue);
-
- if (tq->tqi_flags & AR5K_TXQ_FLAG_TXNOFRMINT_ENABLE)
- AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_nofrm, queue);
-
- /* Update secondary interrupt mask registers */
-
- /* Filter out inactive queues */
- ah->ah_txq_imr_txok &= ah->ah_txq_status;
- ah->ah_txq_imr_txerr &= ah->ah_txq_status;
- ah->ah_txq_imr_txurn &= ah->ah_txq_status;
- ah->ah_txq_imr_txdesc &= ah->ah_txq_status;
- ah->ah_txq_imr_txeol &= ah->ah_txq_status;
- ah->ah_txq_imr_cbrorn &= ah->ah_txq_status;
- ah->ah_txq_imr_cbrurn &= ah->ah_txq_status;
- ah->ah_txq_imr_qtrig &= ah->ah_txq_status;
- ah->ah_txq_imr_nofrm &= ah->ah_txq_status;
-
- ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txok,
- AR5K_SIMR0_QCU_TXOK) |
- AR5K_REG_SM(ah->ah_txq_imr_txdesc,
- AR5K_SIMR0_QCU_TXDESC), AR5K_SIMR0);
- ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txerr,
- AR5K_SIMR1_QCU_TXERR) |
- AR5K_REG_SM(ah->ah_txq_imr_txeol,
- AR5K_SIMR1_QCU_TXEOL), AR5K_SIMR1);
- /* Update simr2 but don't overwrite rest simr2 settings */
- AR5K_REG_DISABLE_BITS(ah, AR5K_SIMR2, AR5K_SIMR2_QCU_TXURN);
- AR5K_REG_ENABLE_BITS(ah, AR5K_SIMR2,
- AR5K_REG_SM(ah->ah_txq_imr_txurn,
- AR5K_SIMR2_QCU_TXURN));
- ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_cbrorn,
- AR5K_SIMR3_QCBRORN) |
- AR5K_REG_SM(ah->ah_txq_imr_cbrurn,
- AR5K_SIMR3_QCBRURN), AR5K_SIMR3);
- ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_qtrig,
- AR5K_SIMR4_QTRIG), AR5K_SIMR4);
- /* Set TXNOFRM_QCU for the queues with TXNOFRM enabled */
- ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_nofrm,
- AR5K_TXNOFRM_QCU), AR5K_TXNOFRM);
- /* No queue has TXNOFRM enabled, disable the interrupt
- * by setting AR5K_TXNOFRM to zero */
- if (ah->ah_txq_imr_nofrm == 0)
- ath5k_hw_reg_write(ah, 0, AR5K_TXNOFRM);
-
- /* Set QCU mask for this DCU to save power */
- AR5K_REG_WRITE_Q(ah, AR5K_QUEUE_QCUMASK(queue), queue);
}
+ /* TODO: Handle frame compression */
+
+ /*
+ * Enable interrupts for this tx queue
+ * in the secondary interrupt mask registers
+ */
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXOKINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txok, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXERRINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txerr, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXURNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txurn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXDESCINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txdesc, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXEOLINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txeol, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRORNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrorn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRURNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrurn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_QTRIGINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_qtrig, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXNOFRMINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_nofrm, queue);
+
+ /* Update secondary interrupt mask registers */
+
+ /* Filter out inactive queues */
+ ah->ah_txq_imr_txok &= ah->ah_txq_status;
+ ah->ah_txq_imr_txerr &= ah->ah_txq_status;
+ ah->ah_txq_imr_txurn &= ah->ah_txq_status;
+ ah->ah_txq_imr_txdesc &= ah->ah_txq_status;
+ ah->ah_txq_imr_txeol &= ah->ah_txq_status;
+ ah->ah_txq_imr_cbrorn &= ah->ah_txq_status;
+ ah->ah_txq_imr_cbrurn &= ah->ah_txq_status;
+ ah->ah_txq_imr_qtrig &= ah->ah_txq_status;
+ ah->ah_txq_imr_nofrm &= ah->ah_txq_status;
+
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txok,
+ AR5K_SIMR0_QCU_TXOK) |
+ AR5K_REG_SM(ah->ah_txq_imr_txdesc,
+ AR5K_SIMR0_QCU_TXDESC),
+ AR5K_SIMR0);
+
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txerr,
+ AR5K_SIMR1_QCU_TXERR) |
+ AR5K_REG_SM(ah->ah_txq_imr_txeol,
+ AR5K_SIMR1_QCU_TXEOL),
+ AR5K_SIMR1);
+
+ /* Update SIMR2 but don't overwrite rest simr2 settings */
+ AR5K_REG_DISABLE_BITS(ah, AR5K_SIMR2, AR5K_SIMR2_QCU_TXURN);
+ AR5K_REG_ENABLE_BITS(ah, AR5K_SIMR2,
+ AR5K_REG_SM(ah->ah_txq_imr_txurn,
+ AR5K_SIMR2_QCU_TXURN));
+
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_cbrorn,
+ AR5K_SIMR3_QCBRORN) |
+ AR5K_REG_SM(ah->ah_txq_imr_cbrurn,
+ AR5K_SIMR3_QCBRURN),
+ AR5K_SIMR3);
+
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_qtrig,
+ AR5K_SIMR4_QTRIG), AR5K_SIMR4);
+
+ /* Set TXNOFRM_QCU for the queues with TXNOFRM enabled */
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_nofrm,
+ AR5K_TXNOFRM_QCU), AR5K_TXNOFRM);
+
+ /* No queue has TXNOFRM enabled, disable the interrupt
+ * by setting AR5K_TXNOFRM to zero */
+ if (ah->ah_txq_imr_nofrm == 0)
+ ath5k_hw_reg_write(ah, 0, AR5K_TXNOFRM);
+
+ /* Set QCU mask for this DCU to save power */
+ AR5K_REG_WRITE_Q(ah, AR5K_QUEUE_QCUMASK(queue), queue);
+
return 0;
}
-/*
- * Set slot time on DCU
+
+/**************************\
+* Global QCU/DCU functions *
+\**************************/
+
+/**
+ * ath5k_hw_set_ifs_intervals - Set global inter-frame spaces on DCU
+ *
+ * @ah The &struct ath5k_hw
+ * @slot_time Slot time in us
+ *
+ * Sets the global IFS intervals on DCU (also works on AR5210) for
+ * the given slot time and the current bwmode.
*/
-int ath5k_hw_set_slot_time(struct ath5k_hw *ah, unsigned int slot_time)
+int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah, unsigned int slot_time)
{
+ struct ieee80211_channel *channel = ah->ah_current_channel;
+ struct ath5k_softc *sc = ah->ah_sc;
+ struct ieee80211_rate *rate;
+ u32 ack_tx_time, eifs, eifs_clock, sifs, sifs_clock;
u32 slot_time_clock = ath5k_hw_htoclock(ah, slot_time);
if (slot_time < 6 || slot_time_clock > AR5K_SLOT_TIME_MAX)
return -EINVAL;
- if (ah->ah_version == AR5K_AR5210)
- ath5k_hw_reg_write(ah, slot_time_clock, AR5K_SLOT_TIME);
+ sifs = ath5k_hw_get_default_sifs(ah);
+ sifs_clock = ath5k_hw_htoclock(ah, sifs);
+
+ /* EIFS
+ * Txtime of ack at lowest rate + SIFS + DIFS
+ * (DIFS = SIFS + 2 * Slot time)
+ *
+ * Note: HAL has some predefined values for EIFS
+ * Turbo: (37 + 2 * 6)
+ * Default: (74 + 2 * 9)
+ * Half: (149 + 2 * 13)
+ * Quarter: (298 + 2 * 21)
+ *
+ * (74 + 2 * 6) for AR5210 default and turbo !
+ *
+ * According to the formula we have
+ * ack_tx_time = 25 for turbo and
+ * ack_tx_time = 42.5 * clock multiplier
+ * for default/half/quarter.
+ *
+ * This can't be right, 42 is what we would get
+ * from ath5k_hw_get_frame_dur_for_bwmode or
+ * ieee80211_generic_frame_duration for zero frame
+ * length and without SIFS !
+ *
+ * Also we have different lowest rate for 802.11a
+ */
+ if (channel->hw_value & CHANNEL_5GHZ)
+ rate = &sc->sbands[IEEE80211_BAND_5GHZ].bitrates[0];
else
- ath5k_hw_reg_write(ah, slot_time_clock, AR5K_DCU_GBL_IFS_SLOT);
+ rate = &sc->sbands[IEEE80211_BAND_2GHZ].bitrates[0];
+
+ ack_tx_time = ath5k_hw_get_frame_duration(ah, 10, rate);
+
+ /* ack_tx_time includes an SIFS already */
+ eifs = ack_tx_time + sifs + 2 * slot_time;
+ eifs_clock = ath5k_hw_htoclock(ah, eifs);
+
+ /* Set IFS settings on AR5210 */
+ if (ah->ah_version == AR5K_AR5210) {
+ u32 pifs, pifs_clock, difs, difs_clock;
+
+ /* Set slot time */
+ ath5k_hw_reg_write(ah, slot_time_clock, AR5K_SLOT_TIME);
+
+ /* Set EIFS */
+ eifs_clock = AR5K_REG_SM(eifs_clock, AR5K_IFS1_EIFS);
+
+ /* PIFS = Slot time + SIFS */
+ pifs = slot_time + sifs;
+ pifs_clock = ath5k_hw_htoclock(ah, pifs);
+ pifs_clock = AR5K_REG_SM(pifs_clock, AR5K_IFS1_PIFS);
+
+ /* DIFS = SIFS + 2 * Slot time */
+ difs = sifs + 2 * slot_time;
+ difs_clock = ath5k_hw_htoclock(ah, difs);
+
+ /* Set SIFS/DIFS */
+ ath5k_hw_reg_write(ah, (difs_clock <<
+ AR5K_IFS0_DIFS_S) | sifs_clock,
+ AR5K_IFS0);
+
+ /* Set PIFS/EIFS and preserve AR5K_INIT_CARR_SENSE_EN */
+ ath5k_hw_reg_write(ah, pifs_clock | eifs_clock |
+ (AR5K_INIT_CARR_SENSE_EN << AR5K_IFS1_CS_EN_S),
+ AR5K_IFS1);
+
+ return 0;
+ }
+
+ /* Set IFS slot time */
+ ath5k_hw_reg_write(ah, slot_time_clock, AR5K_DCU_GBL_IFS_SLOT);
+
+ /* Set EIFS interval */
+ ath5k_hw_reg_write(ah, eifs_clock, AR5K_DCU_GBL_IFS_EIFS);
+
+ /* Set SIFS interval in usecs */
+ AR5K_REG_WRITE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
+ AR5K_DCU_GBL_IFS_MISC_SIFS_DUR_USEC,
+ sifs);
+
+ /* Set SIFS interval in clock cycles */
+ ath5k_hw_reg_write(ah, sifs_clock, AR5K_DCU_GBL_IFS_SIFS);
return 0;
}
+
+int ath5k_hw_init_queues(struct ath5k_hw *ah)
+{
+ int i, ret;
+
+ /* TODO: HW Compression support for data queues */
+ /* TODO: Burst prefetch for data queues */
+
+ /*
+ * Reset queues and start beacon timers at the end of the reset routine
+ * This also sets QCU mask on each DCU for 1:1 qcu to dcu mapping
+ * Note: If we want we can assign multiple qcus on one dcu.
+ */
+ if (ah->ah_version != AR5K_AR5210)
+ for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++) {
+ ret = ath5k_hw_reset_tx_queue(ah, i);
+ if (ret) {
+ ATH5K_ERR(ah->ah_sc,
+ "failed to reset TX queue #%d\n", i);
+ return ret;
+ }
+ }
+ else
+ /* No QCU/DCU on AR5210, just set tx
+ * retry limits. We set IFS parameters
+ * on ath5k_hw_set_ifs_intervals */
+ ath5k_hw_set_tx_retry_limits(ah, 0);
+
+ /* Set the turbo flag when operating on 40MHz */
+ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
+ AR5K_REG_ENABLE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
+ AR5K_DCU_GBL_IFS_MISC_TURBO_MODE);
+
+ /* If we didn't set IFS timings through
+ * ath5k_hw_set_coverage_class make sure
+ * we set them here */
+ if (!ah->ah_coverage_class) {
+ unsigned int slot_time = ath5k_hw_get_default_slottime(ah);
+ ath5k_hw_set_ifs_intervals(ah, slot_time);
+ }
+
+ return 0;
+}