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Commit d64dd2a1 authored by Karun Eagalapati's avatar Karun Eagalapati Committed by Kalle Valo
Browse files

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: default avatarKarun Eagalapati <karun256@gmail.com>
Signed-off-by: default avatarAmitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 23e414cc

drivers/net/wireless/rsi/rsi_91x_sdio_ops.c

+15 −1
Original line number Diff line number Diff line
@@ -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;

drivers/net/wireless/rsi/rsi_sdio.h

+1 −0
Original line number Diff line number Diff line
@@ -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);