mt76: mt7615: use larger rx buffers if VHT is supported

In VHT mode we can receive larger MPDUs. Increasing the buffer size reduces
fragmentation here, which should improve performance.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
index 5cdbe37479017becbd615b6754799cad5829cc0c..0b1fbddd1c3fdabfaa9c7cd3b21a6199fb90c426 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
@@ -192,8 +192,13 @@ static void mt7663_dma_sched_init(struct mt7615_dev *dev)
 int mt7615_dma_init(struct mt7615_dev *dev)
 {
        int rx_ring_size = MT7615_RX_RING_SIZE;
+       int rx_buf_size = MT_RX_BUF_SIZE;
        int ret;
 
+       /* Increase buffer size to receive large VHT MPDUs */
+       if (dev->mt76.cap.has_5ghz)
+               rx_buf_size *= 2;
+
        mt76_dma_attach(&dev->mt76);
 
        mt76_wr(dev, MT_WPDMA_GLO_CFG,
@@ -234,7 +239,7 @@ int mt7615_dma_init(struct mt7615_dev *dev)
 
        /* init rx queues */
        ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
-                              MT7615_RX_MCU_RING_SIZE, MT_RX_BUF_SIZE,
+                              MT7615_RX_MCU_RING_SIZE, rx_buf_size,
                               MT_RX_RING_BASE);
        if (ret)
                return ret;
@@ -243,7 +248,7 @@ int mt7615_dma_init(struct mt7615_dev *dev)
            rx_ring_size /= 2;
 
        ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0,
-                              rx_ring_size, MT_RX_BUF_SIZE, MT_RX_RING_BASE);
+                              rx_ring_size, rx_buf_size, MT_RX_RING_BASE);
        if (ret)
                return ret;