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raspberrypi-kernel
提交 9a819996 编写于 作者: H Helmut Schaa 提交者： John W. Linville
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rt2x00: Optimize register access in rt2800pci 

All register reads/writes in rt2800pci were previously done with
rt2800_register_read/rt2800_register_write. These however indirectly
call rt2x00pci_register_read/rt2x00pci_register_write which adds an
additional overhead of at least one call and several move instructions
to each register access.

Replacing the calls to rt2800_register_read/rt2800_register_write with
direct calls to rt2x00pci_register_read/rt2x00pci_register_write gets
rid of quite a number of instructions in the drivers hotpaths (IRQ
handling and txdone handling).

For consistency replace all references to rt2800_register_read/write
with the rt2x00pci_register_read/write variants.
Signed-off-by: NHelmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 46a01ec0
隐藏空白更改
内联 并排
Showing with 84 addition and 74 deletion
drivers/net/wireless/rt2x00/rt2800pci.c
浏览文件 @ 9a819996
......@@ -66,7 +66,7 @@ static void rt2800pci_mcu_status(struct rt2x00_dev *rt2x00dev, const u8 token)
return;
for (i = 0; i < 200; i++) {
rt2800_register_read(rt2x00dev, H2M_MAILBOX_CID, &reg);
rt2x00pci_register_read(rt2x00dev, H2M_MAILBOX_CID, &reg);
if ((rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD0) == token) ||
(rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD1) == token) ||
......@@ -80,8 +80,8 @@ static void rt2800pci_mcu_status(struct rt2x00_dev *rt2x00dev, const u8 token)
if (i == 200)
ERROR(rt2x00dev, "MCU request failed, no response from hardware\n");
rt2800_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);
rt2800_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
}
#if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT305X)
......@@ -105,7 +105,7 @@ static void rt2800pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
struct rt2x00_dev *rt2x00dev = eeprom->data;
u32 reg;
rt2800_register_read(rt2x00dev, E2PROM_CSR, &reg);
rt2x00pci_register_read(rt2x00dev, E2PROM_CSR, &reg);
eeprom->reg_data_in = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_IN);
eeprom->reg_data_out = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_OUT);
......@@ -127,7 +127,7 @@ static void rt2800pci_eepromregister_write(struct eeprom_93cx6 *eeprom)
rt2x00_set_field32(&reg, E2PROM_CSR_CHIP_SELECT,
!!eeprom->reg_chip_select);
rt2800_register_write(rt2x00dev, E2PROM_CSR, reg);
rt2x00pci_register_write(rt2x00dev, E2PROM_CSR, reg);
}
static void rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev)
......@@ -135,7 +135,7 @@ static void rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev)
struct eeprom_93cx6 eeprom;
u32 reg;
rt2800_register_read(rt2x00dev, E2PROM_CSR, &reg);
rt2x00pci_register_read(rt2x00dev, E2PROM_CSR, &reg);
eeprom.data = rt2x00dev;
eeprom.register_read = rt2800pci_eepromregister_read;
......@@ -195,9 +195,9 @@ static void rt2800pci_start_queue(struct data_queue *queue)
switch (queue->qid) {
case QID_RX:
rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00pci_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX, 1);
rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
rt2x00pci_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
break;
case QID_BEACON:
/*
......@@ -207,15 +207,15 @@ static void rt2800pci_start_queue(struct data_queue *queue)
tasklet_enable(&rt2x00dev->tbtt_tasklet);
tasklet_enable(&rt2x00dev->pretbtt_tasklet);
rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
rt2x00pci_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 1);
rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
rt2x00pci_register_write(rt2x00dev, BCN_TIME_CFG, reg);
rt2800_register_read(rt2x00dev, INT_TIMER_EN, &reg);
rt2x00pci_register_read(rt2x00dev, INT_TIMER_EN, &reg);
rt2x00_set_field32(&reg, INT_TIMER_EN_PRE_TBTT_TIMER, 1);
rt2800_register_write(rt2x00dev, INT_TIMER_EN, reg);
rt2x00pci_register_write(rt2x00dev, INT_TIMER_EN, reg);
break;
default:
break;
......@@ -233,11 +233,13 @@ static void rt2800pci_kick_queue(struct data_queue *queue)
case QID_AC_BE:
case QID_AC_BK:
entry = rt2x00queue_get_entry(queue, Q_INDEX);
rt2800_register_write(rt2x00dev, TX_CTX_IDX(queue->qid), entry->entry_idx);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX(queue->qid),
entry->entry_idx);
break;
case QID_MGMT:
entry = rt2x00queue_get_entry(queue, Q_INDEX);
rt2800_register_write(rt2x00dev, TX_CTX_IDX(5), entry->entry_idx);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX(5),
entry->entry_idx);
break;
default:
break;
......@@ -251,20 +253,20 @@ static void rt2800pci_stop_queue(struct data_queue *queue)
switch (queue->qid) {
case QID_RX:
rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00pci_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX, 0);
rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
rt2x00pci_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
break;
case QID_BEACON:
rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
rt2x00pci_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 0);
rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 0);
rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
rt2x00pci_register_write(rt2x00dev, BCN_TIME_CFG, reg);
rt2800_register_read(rt2x00dev, INT_TIMER_EN, &reg);
rt2x00pci_register_read(rt2x00dev, INT_TIMER_EN, &reg);
rt2x00_set_field32(&reg, INT_TIMER_EN_PRE_TBTT_TIMER, 0);
rt2800_register_write(rt2x00dev, INT_TIMER_EN, reg);
rt2x00pci_register_write(rt2x00dev, INT_TIMER_EN, reg);
/*
* Wait for tbtt tasklets to finish.
......@@ -295,7 +297,7 @@ static int rt2800pci_write_firmware(struct rt2x00_dev *rt2x00dev,
*/
reg = 0;
rt2x00_set_field32(&reg, PBF_SYS_CTRL_HOST_RAM_WRITE, 1);
rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, reg);
rt2x00pci_register_write(rt2x00dev, PBF_SYS_CTRL, reg);
/*
* Write firmware to device.
......@@ -303,11 +305,11 @@ static int rt2800pci_write_firmware(struct rt2x00_dev *rt2x00dev,
rt2800_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
data, len);
rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000);
rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001);
rt2x00pci_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000);
rt2x00pci_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001);
rt2800_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
rt2800_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);
rt2x00pci_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);
return 0;
}
......@@ -351,7 +353,7 @@ static void rt2800pci_clear_entry(struct queue_entry *entry)
* Set RX IDX in register to inform hardware that we have
* handled this entry and it is available for reuse again.
*/
rt2800_register_write(rt2x00dev, RX_CRX_IDX,
rt2x00pci_register_write(rt2x00dev, RX_CRX_IDX,
entry->entry_idx);
} else {
rt2x00_desc_read(entry_priv->desc, 1, &word);
......@@ -369,45 +371,51 @@ static int rt2800pci_init_queues(struct rt2x00_dev *rt2x00dev)
* Initialize registers.
*/
entry_priv = rt2x00dev->tx[0].entries[0].priv_data;
rt2800_register_write(rt2x00dev, TX_BASE_PTR0, entry_priv->desc_dma);
rt2800_register_write(rt2x00dev, TX_MAX_CNT0, rt2x00dev->tx[0].limit);
rt2800_register_write(rt2x00dev, TX_CTX_IDX0, 0);
rt2800_register_write(rt2x00dev, TX_DTX_IDX0, 0);
rt2x00pci_register_write(rt2x00dev, TX_BASE_PTR0, entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TX_MAX_CNT0,
rt2x00dev->tx[0].limit);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX0, 0);
rt2x00pci_register_write(rt2x00dev, TX_DTX_IDX0, 0);
entry_priv = rt2x00dev->tx[1].entries[0].priv_data;
rt2800_register_write(rt2x00dev, TX_BASE_PTR1, entry_priv->desc_dma);
rt2800_register_write(rt2x00dev, TX_MAX_CNT1, rt2x00dev->tx[1].limit);
rt2800_register_write(rt2x00dev, TX_CTX_IDX1, 0);
rt2800_register_write(rt2x00dev, TX_DTX_IDX1, 0);
rt2x00pci_register_write(rt2x00dev, TX_BASE_PTR1, entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TX_MAX_CNT1,
rt2x00dev->tx[1].limit);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX1, 0);
rt2x00pci_register_write(rt2x00dev, TX_DTX_IDX1, 0);
entry_priv = rt2x00dev->tx[2].entries[0].priv_data;
rt2800_register_write(rt2x00dev, TX_BASE_PTR2, entry_priv->desc_dma);
rt2800_register_write(rt2x00dev, TX_MAX_CNT2, rt2x00dev->tx[2].limit);
rt2800_register_write(rt2x00dev, TX_CTX_IDX2, 0);
rt2800_register_write(rt2x00dev, TX_DTX_IDX2, 0);
rt2x00pci_register_write(rt2x00dev, TX_BASE_PTR2, entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TX_MAX_CNT2,
rt2x00dev->tx[2].limit);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX2, 0);
rt2x00pci_register_write(rt2x00dev, TX_DTX_IDX2, 0);
entry_priv = rt2x00dev->tx[3].entries[0].priv_data;
rt2800_register_write(rt2x00dev, TX_BASE_PTR3, entry_priv->desc_dma);
rt2800_register_write(rt2x00dev, TX_MAX_CNT3, rt2x00dev->tx[3].limit);
rt2800_register_write(rt2x00dev, TX_CTX_IDX3, 0);
rt2800_register_write(rt2x00dev, TX_DTX_IDX3, 0);
rt2x00pci_register_write(rt2x00dev, TX_BASE_PTR3, entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TX_MAX_CNT3,
rt2x00dev->tx[3].limit);
rt2x00pci_register_write(rt2x00dev, TX_CTX_IDX3, 0);
rt2x00pci_register_write(rt2x00dev, TX_DTX_IDX3, 0);
entry_priv = rt2x00dev->rx->entries[0].priv_data;
rt2800_register_write(rt2x00dev, RX_BASE_PTR, entry_priv->desc_dma);
rt2800_register_write(rt2x00dev, RX_MAX_CNT, rt2x00dev->rx[0].limit);
rt2800_register_write(rt2x00dev, RX_CRX_IDX, rt2x00dev->rx[0].limit - 1);
rt2800_register_write(rt2x00dev, RX_DRX_IDX, 0);
rt2x00pci_register_write(rt2x00dev, RX_BASE_PTR, entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, RX_MAX_CNT,
rt2x00dev->rx[0].limit);
rt2x00pci_register_write(rt2x00dev, RX_CRX_IDX,
rt2x00dev->rx[0].limit - 1);
rt2x00pci_register_write(rt2x00dev, RX_DRX_IDX, 0);
/*
* Enable global DMA configuration
*/
rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
rt2x00pci_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0);
rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1);
rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
rt2x00pci_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
rt2800_register_write(rt2x00dev, DELAY_INT_CFG, 0);
rt2x00pci_register_write(rt2x00dev, DELAY_INT_CFG, 0);
return 0;
}
......@@ -427,8 +435,8 @@ static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
* should clear the register to assure a clean state.
*/
if (state == STATE_RADIO_IRQ_ON) {
rt2800_register_read(rt2x00dev, INT_SOURCE_CSR, &reg);
rt2800_register_write(rt2x00dev, INT_SOURCE_CSR, reg);
rt2x00pci_register_read(rt2x00dev, INT_SOURCE_CSR, &reg);
rt2x00pci_register_write(rt2x00dev, INT_SOURCE_CSR, reg);
/*
* Enable tasklets. The beacon related tasklets are
......@@ -440,7 +448,7 @@ static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
}
spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags);
rt2800_register_read(rt2x00dev, INT_MASK_CSR, &reg);
rt2x00pci_register_read(rt2x00dev, INT_MASK_CSR, &reg);
rt2x00_set_field32(&reg, INT_MASK_CSR_RXDELAYINT, 0);
rt2x00_set_field32(&reg, INT_MASK_CSR_TXDELAYINT, 0);
rt2x00_set_field32(&reg, INT_MASK_CSR_RX_DONE, mask);
......@@ -459,7 +467,7 @@ static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
rt2x00_set_field32(&reg, INT_MASK_CSR_GPTIMER, 0);
rt2x00_set_field32(&reg, INT_MASK_CSR_RX_COHERENT, 0);
rt2x00_set_field32(&reg, INT_MASK_CSR_TX_COHERENT, 0);
rt2800_register_write(rt2x00dev, INT_MASK_CSR, reg);
rt2x00pci_register_write(rt2x00dev, INT_MASK_CSR, reg);
spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags);
if (state == STATE_RADIO_IRQ_OFF) {
......@@ -480,7 +488,7 @@ static int rt2800pci_init_registers(struct rt2x00_dev *rt2x00dev)
/*
* Reset DMA indexes
*/
rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, &reg);
rt2x00pci_register_read(rt2x00dev, WPDMA_RST_IDX, &reg);
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX0, 1);
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX1, 1);
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX2, 1);
......@@ -488,26 +496,26 @@ static int rt2800pci_init_registers(struct rt2x00_dev *rt2x00dev)
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX4, 1);
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX5, 1);
rt2x00_set_field32(&reg, WPDMA_RST_IDX_DRX_IDX0, 1);
rt2800_register_write(rt2x00dev, WPDMA_RST_IDX, reg);
rt2x00pci_register_write(rt2x00dev, WPDMA_RST_IDX, reg);
rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e1f);
rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e00);
rt2x00pci_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e1f);
rt2x00pci_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e00);
if (rt2x00_rt(rt2x00dev, RT5390)) {
rt2800_register_read(rt2x00dev, AUX_CTRL, &reg);
rt2x00pci_register_read(rt2x00dev, AUX_CTRL, &reg);
rt2x00_set_field32(&reg, AUX_CTRL_FORCE_PCIE_CLK, 1);
rt2x00_set_field32(&reg, AUX_CTRL_WAKE_PCIE_EN, 1);
rt2800_register_write(rt2x00dev, AUX_CTRL, reg);
rt2x00pci_register_write(rt2x00dev, AUX_CTRL, reg);
}
rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003);
rt2x00pci_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003);
rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00pci_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_CSR, 1);
rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_BBP, 1);
rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
rt2x00pci_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00000000);
rt2x00pci_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00000000);
return 0;
}
......@@ -525,8 +533,8 @@ static void rt2800pci_disable_radio(struct rt2x00_dev *rt2x00dev)
{
if (rt2x00_is_soc(rt2x00dev)) {
rt2800_disable_radio(rt2x00dev);
rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0);
rt2800_register_write(rt2x00dev, TX_PIN_CFG, 0);
rt2x00pci_register_write(rt2x00dev, PWR_PIN_CFG, 0);
rt2x00pci_register_write(rt2x00dev, TX_PIN_CFG, 0);
}
}
......@@ -537,8 +545,10 @@ static int rt2800pci_set_state(struct rt2x00_dev *rt2x00dev,
rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKUP, 0, 0x02);
rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKUP);
} else if (state == STATE_SLEEP) {
rt2800_register_write(rt2x00dev, H2M_MAILBOX_STATUS, 0xffffffff);
rt2800_register_write(rt2x00dev, H2M_MAILBOX_CID, 0xffffffff);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_STATUS,
0xffffffff);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_CID,
0xffffffff);
rt2800_mcu_request(rt2x00dev, MCU_SLEEP, 0x01, 0xff, 0x01);
}
......@@ -778,9 +788,9 @@ static inline void rt2800pci_enable_interrupt(struct rt2x00_dev *rt2x00dev,
* access needs locking.
*/
spin_lock_irq(&rt2x00dev->irqmask_lock);
rt2800_register_read(rt2x00dev, INT_MASK_CSR, &reg);
rt2x00pci_register_read(rt2x00dev, INT_MASK_CSR, &reg);
rt2x00_set_field32(&reg, irq_field, 1);
rt2800_register_write(rt2x00dev, INT_MASK_CSR, reg);
rt2x00pci_register_write(rt2x00dev, INT_MASK_CSR, reg);
spin_unlock_irq(&rt2x00dev->irqmask_lock);
}
......@@ -851,7 +861,7 @@ static void rt2800pci_txstatus_interrupt(struct rt2x00_dev *rt2x00dev)
* need to lock the kfifo.
*/
for (i = 0; i < rt2x00dev->ops->tx->entry_num; i++) {
rt2800_register_read(rt2x00dev, TX_STA_FIFO, &status);
rt2x00pci_register_read(rt2x00dev, TX_STA_FIFO, &status);
if (!rt2x00_get_field32(status, TX_STA_FIFO_VALID))
break;
......@@ -873,8 +883,8 @@ static irqreturn_t rt2800pci_interrupt(int irq, void *dev_instance)
u32 reg, mask;
/* Read status and ACK all interrupts */
rt2800_register_read(rt2x00dev, INT_SOURCE_CSR, &reg);
rt2800_register_write(rt2x00dev, INT_SOURCE_CSR, reg);
rt2x00pci_register_read(rt2x00dev, INT_SOURCE_CSR, &reg);
rt2x00pci_register_write(rt2x00dev, INT_SOURCE_CSR, reg);
if (!reg)
return IRQ_NONE;
......@@ -914,9 +924,9 @@ static irqreturn_t rt2800pci_interrupt(int irq, void *dev_instance)
* the tasklet will reenable the appropriate interrupts.
*/
spin_lock(&rt2x00dev->irqmask_lock);
rt2800_register_read(rt2x00dev, INT_MASK_CSR, &reg);
rt2x00pci_register_read(rt2x00dev, INT_MASK_CSR, &reg);
reg &= mask;
rt2800_register_write(rt2x00dev, INT_MASK_CSR, reg);
rt2x00pci_register_write(rt2x00dev, INT_MASK_CSR, reg);
spin_unlock(&rt2x00dev->irqmask_lock);
return IRQ_HANDLED;
......
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