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rsi: buffer full check optimization 

We get buffer full event from firmware whenever Tx queue is full
Host should stop writing packets after this and resume after
buffer free event.
Buffer status checking is optimized for once in 4 times if
BUFF_FULL condition is not set, otherwise once for every
packet.

Signed-off-by: Karun Eagalapati <karun256@gmail.com>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Karun Eagalapati 2017-08-03 19:59:02 +05:30 committed by Kalle Valo
parent 23e414cca1
commit d64dd2a172
2 changed files with 16 additions and 1 deletions
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16
drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
View File

@ -271,6 +271,7 @@ void rsi_interrupt_handler(struct rsi_hw *adapter)
"%s: ==> BUFFER_AVAILABLE <==\n",
__func__);
dev->rx_info.buf_available_counter++;
dev->buff_status_updated = true;
break;
case FIRMWARE_ASSERT_IND:
@ -333,7 +334,14 @@ int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num)
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
u8 buf_status = 0;
int status = 0;
static int counter = 4;
if (!dev->buff_status_updated && counter) {
counter--;
goto out;
}
dev->buff_status_updated = false;
status = rsi_sdio_read_register(common->priv,
RSI_DEVICE_BUFFER_STATUS_REGISTER,
&buf_status);
@ -368,10 +376,16 @@ int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num)
dev->rx_info.semi_buffer_full = false;
}
if (dev->rx_info.mgmt_buffer_full || dev->rx_info.buf_full_counter)
counter = 1;
else
counter = 4;
out:
if ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
return QUEUE_FULL;
if (dev->rx_info.buffer_full)
if ((q_num < MGMT_SOFT_Q) && (dev->rx_info.buffer_full))
return QUEUE_FULL;
return QUEUE_NOT_FULL;

1
drivers/net/wireless/rsi/rsi_sdio.h
View File

@ -114,6 +114,7 @@ struct rsi_91x_sdiodev {
u8 prev_desc[16];
u16 tx_blk_size;
u8 write_fail;
bool buff_status_updated;
};
void rsi_interrupt_handler(struct rsi_hw *adapter);