Reduce rx memory footprint allocating just one SG buffer since for the moment we support just 3839B as maximal size of an A-MSDU. Introduce different SG_MAX_SIZE definitions for TX and RX sides. Moreover set q->buf_size to PAGE_SIZE even for SG case.
Signed-off-by: Lorenzo Bianconi <[email protected]> --- Changes since v3: - drop patch 2/3: mt76u: introduce mt76u_ep data structure - do not align usb buffer size to usb max endpoint length --- drivers/net/wireless/mediatek/mt76/mt76.h | 3 ++- .../net/wireless/mediatek/mt76/mt76x0/usb.c | 2 +- .../wireless/mediatek/mt76/mt76x2/usb_init.c | 2 +- drivers/net/wireless/mediatek/mt76/usb.c | 18 +++++++++++------- 4 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 23a5ebefac3a..eee83c369a64 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -384,7 +384,8 @@ enum mt76u_out_ep { __MT_EP_OUT_MAX, }; -#define MT_SG_MAX_SIZE 8 +#define MT_TX_SG_MAX_SIZE 8 +#define MT_RX_SG_MAX_SIZE 1 #define MT_NUM_TX_ENTRIES 256 #define MT_NUM_RX_ENTRIES 128 #define MCU_RESP_URB_SIZE 1024 diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c index 7c38ec4418db..5b9701ce6f37 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c @@ -191,7 +191,7 @@ static int mt76x0u_register_device(struct mt76x02_dev *dev) /* check hw sg support in order to enable AMSDU */ if (dev->mt76.usb.sg_en) - hw->max_tx_fragments = MT_SG_MAX_SIZE; + hw->max_tx_fragments = MT_TX_SG_MAX_SIZE; else hw->max_tx_fragments = 1; diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c index f2c57d5b87f9..94f52f98019b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c @@ -225,7 +225,7 @@ int mt76x2u_register_device(struct mt76x02_dev *dev) /* check hw sg support in order to enable AMSDU */ if (dev->mt76.usb.sg_en) - hw->max_tx_fragments = MT_SG_MAX_SIZE; + hw->max_tx_fragments = MT_TX_SG_MAX_SIZE; else hw->max_tx_fragments = 1; diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index dd90427b2d67..ecc1aa59f5c1 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -333,12 +333,13 @@ mt76u_refill_rx(struct mt76_dev *dev, struct urb *urb, int nsgs, gfp_t gfp) } static int -mt76u_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e) +mt76u_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e, + int sg_max_size) { unsigned int size = sizeof(struct urb); if (dev->usb.sg_en) - size += MT_SG_MAX_SIZE * sizeof(struct scatterlist); + size += sg_max_size * sizeof(struct scatterlist); e->urb = kzalloc(size, GFP_KERNEL); if (!e->urb) @@ -357,11 +358,12 @@ mt76u_rx_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e) { int err; - err = mt76u_urb_alloc(dev, e); + err = mt76u_urb_alloc(dev, e, MT_RX_SG_MAX_SIZE); if (err) return err; - return mt76u_refill_rx(dev, e->urb, MT_SG_MAX_SIZE, GFP_KERNEL); + return mt76u_refill_rx(dev, e->urb, MT_RX_SG_MAX_SIZE, + GFP_KERNEL); } static void mt76u_urb_free(struct urb *urb) @@ -605,8 +607,9 @@ static int mt76u_alloc_rx(struct mt76_dev *dev) if (!q->entry) return -ENOMEM; - q->buf_size = dev->usb.sg_en ? MT_RX_BUF_SIZE : PAGE_SIZE; q->ndesc = MT_NUM_RX_ENTRIES; + q->buf_size = PAGE_SIZE; + for (i = 0; i < q->ndesc; i++) { err = mt76u_rx_urb_alloc(dev, &q->entry[i]); if (err < 0) @@ -763,7 +766,7 @@ mt76u_tx_setup_buffers(struct mt76_dev *dev, struct sk_buff *skb, urb->transfer_buffer = skb->data; return 0; } else { - sg_init_table(urb->sg, MT_SG_MAX_SIZE); + sg_init_table(urb->sg, MT_TX_SG_MAX_SIZE); urb->num_sgs = skb_to_sgvec(skb, urb->sg, 0, skb->len); if (urb->num_sgs == 0) return -ENOMEM; @@ -857,7 +860,8 @@ static int mt76u_alloc_tx(struct mt76_dev *dev) q->ndesc = MT_NUM_TX_ENTRIES; for (j = 0; j < q->ndesc; j++) { - err = mt76u_urb_alloc(dev, &q->entry[j]); + err = mt76u_urb_alloc(dev, &q->entry[j], + MT_TX_SG_MAX_SIZE); if (err < 0) return err; } -- 2.21.0
