diff mbox

[v2,6/8] rsi: buffer full check optimization

Message ID 1501770544-6746-7-git-send-email-amitkarwar@gmail.com (mailing list archive)
State Accepted
Commit d64dd2a172d875962f8ae35af3bbd9aa1c679039
Delegated to: Kalle Valo
Headers show

Commit Message

Amitkumar Karwar Aug. 3, 2017, 2:29 p.m. UTC 
From: Karun Eagalapati <karun256@gmail.com>

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>
---
 drivers/net/wireless/rsi/rsi_91x_sdio_ops.c | 16 +++++++++++++++-
 drivers/net/wireless/rsi/rsi_sdio.h         |  1 +
 2 files changed, 16 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c b/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
index 9b94ba7..94a9fcd 100644
--- a/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
+++ b/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
@@ -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;
diff --git a/drivers/net/wireless/rsi/rsi_sdio.h b/drivers/net/wireless/rsi/rsi_sdio.h
index 9239fbe..95e4bed 100644
--- a/drivers/net/wireless/rsi/rsi_sdio.h
+++ b/drivers/net/wireless/rsi/rsi_sdio.h
@@ -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);