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mt76: usb: do not always copy the first part of received frames

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Set usb buffer size taking into account skb_shared_info in order to
not always copy the first part of received frames if A-MSDU is enabled
for SG capable devices

Signed-off-by: Lorenzo Bianconi <[email protected]>
This commit is contained in:
Lorenzo Bianconi
2019-06-07 19:04:04 +02:00
committed by Felix Fietkau
parent 2bfae5a252
commit b0335320fc
2 changed files with 11 additions and 4 deletions
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mt76.h
+3
View File
@@ -32,6 +32,9 @@
#define MT_RX_BUF_SIZE 2048
#define MT_SKB_HEAD_LEN 128
#define MT_BUF_WITH_OVERHEAD(x) \
((x) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
struct mt76_dev;
struct mt76_wcid;
usb.c
+8 -4
View File
@@ -286,7 +286,7 @@ static int
mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb,
int nsgs, gfp_t gfp)
{
int i;
int i, data_size = SKB_WITH_OVERHEAD(q->buf_size);
for (i = 0; i < nsgs; i++) {
struct page *page;
@@ -299,7 +299,7 @@ mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb,
page = virt_to_head_page(data);
offset = data - page_address(page);
sg_set_page(&urb->sg[i], page, q->buf_size, offset);
sg_set_page(&urb->sg[i], page, data_size, offset);
}
if (i < nsgs) {
@@ -311,7 +311,7 @@ mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb,
}
urb->num_sgs = max_t(int, i, urb->num_sgs);
urb->transfer_buffer_length = urb->num_sgs * q->buf_size,
urb->transfer_buffer_length = urb->num_sgs * data_size;
sg_init_marker(urb->sg, urb->num_sgs);
return i ? : -ENOMEM;
@@ -611,8 +611,12 @@ 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;
if (dev->usb.sg_en)
q->buf_size = MT_BUF_WITH_OVERHEAD(MT_RX_BUF_SIZE);
else
q->buf_size = PAGE_SIZE;
q->ndesc = MT_NUM_RX_ENTRIES;
for (i = 0; i < q->ndesc; i++) {
err = mt76u_rx_urb_alloc(dev, &q->entry[i]);
if (err < 0)