mirror of
https://github.com/outbackdingo/mt76.git
synced 2026-10-24 13:26:48 +00:00
314 lines
6.5 KiB
C
314 lines
6.5 KiB
C
/*
|
|
* Copyright (C) 2014 Felix Fietkau <[email protected]>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include "mt7603.h"
|
|
#include "mt7603_dma.h"
|
|
|
|
static int
|
|
mt7603_dma_add_rx_buf(struct mt7603_dev *dev, struct mt76_queue *q,
|
|
dma_addr_t addr, int len)
|
|
{
|
|
return mt76_queue_add_buf(dev, q, addr, len, 0, 0, 0);
|
|
}
|
|
|
|
static int
|
|
mt7603_dma_rx_fill(struct mt7603_dev *dev, struct mt76_queue *q)
|
|
{
|
|
dma_addr_t addr;
|
|
void *buf;
|
|
int frames = 0;
|
|
int len = SKB_WITH_OVERHEAD(q->buf_size);
|
|
int idx;
|
|
|
|
spin_lock_bh(&q->lock);
|
|
|
|
while (q->queued < q->ndesc - 1) {
|
|
buf = kzalloc(q->buf_size, GFP_ATOMIC);
|
|
if (!buf)
|
|
break;
|
|
|
|
addr = dma_map_single(dev->mt76.dev, buf, len, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(dev->mt76.dev, addr)) {
|
|
kfree(buf);
|
|
break;
|
|
}
|
|
|
|
idx = mt7603_dma_add_rx_buf(dev, q, addr, len);
|
|
q->entry[idx].buf = buf;
|
|
frames++;
|
|
}
|
|
|
|
if (frames)
|
|
mt76_queue_kick(dev, q);
|
|
|
|
spin_unlock_bh(&q->lock);
|
|
|
|
return frames;
|
|
}
|
|
|
|
int
|
|
mt7603_tx_queue_mcu(struct mt7603_dev *dev, enum mt7603_txq_id qid,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct mt76_queue *q = &dev->q_tx[qid];
|
|
dma_addr_t addr;
|
|
int idx;
|
|
|
|
addr = dma_map_single(dev->mt76.dev, skb->data, skb->len, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev->mt76.dev, addr))
|
|
return -ENOMEM;
|
|
|
|
spin_lock_bh(&q->lock);
|
|
idx = mt76_queue_add_buf(dev, q, addr, skb->len, 0, 0, 0);
|
|
q->entry[idx].skb = skb;
|
|
mt76_queue_kick(dev, q);
|
|
spin_unlock_bh(&q->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
mt7603_tx_cleanup_entry(struct mt76_dev *mdev, struct mt76_queue *q,
|
|
struct mt76_queue_entry *e)
|
|
{
|
|
struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
|
|
|
|
(void) dev;
|
|
dev_kfree_skb_any(e->skb);
|
|
|
|
if (e->schedule)
|
|
q->swq_queued--;
|
|
}
|
|
|
|
static void
|
|
mt7603_rx_cleanup(struct mt7603_dev *dev, struct mt76_queue *q)
|
|
{
|
|
void *buf;
|
|
|
|
spin_lock_bh(&q->lock);
|
|
do {
|
|
buf = mt76_queue_dequeue(dev, q, true, NULL, NULL);
|
|
if (!buf)
|
|
break;
|
|
|
|
kfree(buf);
|
|
} while (1);
|
|
spin_unlock_bh(&q->lock);
|
|
}
|
|
|
|
static void
|
|
mt76_tx_cleanup(struct mt7603_dev *dev, struct mt76_queue *q, bool flush)
|
|
{
|
|
spin_lock_bh(&q->lock);
|
|
mt76_queue_cleanup(dev, q, flush, mt7603_tx_cleanup_entry);
|
|
spin_unlock_bh(&q->lock);
|
|
}
|
|
|
|
static int
|
|
mt7603_init_tx_queue(struct mt7603_dev *dev, struct mt76_queue *q,
|
|
int idx, int n_desc, bool mcu)
|
|
{
|
|
int ret;
|
|
|
|
q->regs = dev->mt76.regs + MT_TX_RING_BASE + idx * MT_RING_SIZE;
|
|
q->ndesc = n_desc;
|
|
|
|
ret = mt76_queue_alloc(dev, q);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mt7603_irq_enable(dev, MT_INT_TX_DONE(idx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
mt7603_process_rx_skb(struct mt7603_dev *dev, struct mt76_queue *q,
|
|
struct sk_buff *skb, u32 info)
|
|
{
|
|
if (q == &dev->mcu.q_rx) {
|
|
u32 *rxfce;
|
|
|
|
rxfce = (u32 *) skb->cb;
|
|
*rxfce = info;
|
|
|
|
skb_queue_tail(&dev->mcu.res_q, skb);
|
|
wake_up(&dev->mcu.wait);
|
|
return;
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
static int
|
|
mt7603_process_rx_queue(struct mt7603_dev *dev, struct mt76_queue *q, int budget)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned char *data;
|
|
int len;
|
|
int done = 0;
|
|
|
|
while (done < budget) {
|
|
u32 info;
|
|
|
|
data = mt76_queue_dequeue(dev, q, false, &len, &info);
|
|
if (!data)
|
|
break;
|
|
|
|
skb = build_skb(data, 0);
|
|
if (!skb) {
|
|
kfree(data);
|
|
continue;
|
|
}
|
|
|
|
if (skb->tail + len > skb->end) {
|
|
dev_kfree_skb(skb);
|
|
continue;
|
|
}
|
|
|
|
__skb_put(skb, len);
|
|
mt7603_process_rx_skb(dev, q, skb, info);
|
|
done++;
|
|
}
|
|
|
|
mt7603_dma_rx_fill(dev, q);
|
|
return done;
|
|
}
|
|
|
|
static int
|
|
mt7603_init_rx_queue(struct mt7603_dev *dev, struct mt76_queue *q,
|
|
int idx, int n_desc, int bufsize)
|
|
{
|
|
int ret;
|
|
|
|
q->regs = dev->mt76.regs + MT_RX_RING_BASE + idx * MT_RING_SIZE;
|
|
q->ndesc = n_desc;
|
|
q->buf_size = bufsize;
|
|
|
|
ret = mt76_queue_alloc(dev, q);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mt7603_irq_enable(dev, MT_INT_RX_DONE(idx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
mt7603_tx_tasklet(unsigned long data)
|
|
{
|
|
struct mt7603_dev *dev = (struct mt7603_dev *) data;
|
|
int i;
|
|
|
|
for (i = ARRAY_SIZE(dev->q_tx) - 1; i >= 0; i--)
|
|
mt76_tx_cleanup(dev, &dev->q_tx[i], false);
|
|
|
|
mt7603_irq_enable(dev, MT_INT_TX_DONE_ALL);
|
|
}
|
|
|
|
static int
|
|
mt7603_dma_rx_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct mt7603_dev *dev = container_of(napi, struct mt7603_dev, napi);
|
|
int done;
|
|
|
|
done = mt7603_process_rx_queue(dev, &dev->q_rx, budget);
|
|
|
|
if (done < budget) {
|
|
napi_complete(napi);
|
|
mt7603_irq_enable(dev, MT_INT_RX_DONE(0));
|
|
}
|
|
|
|
return done;
|
|
}
|
|
|
|
static void
|
|
mt7603_rx_tasklet(unsigned long data)
|
|
{
|
|
struct mt7603_dev *dev = (struct mt7603_dev *) data;
|
|
|
|
mt7603_process_rx_queue(dev, &dev->mcu.q_rx, dev->mcu.q_rx.ndesc);
|
|
mt7603_irq_enable(dev, MT_INT_RX_DONE(1));
|
|
}
|
|
|
|
int mt7603_dma_init(struct mt7603_dev *dev)
|
|
{
|
|
static const u8 wmm_queue_map[] = {
|
|
[IEEE80211_AC_BE] = 0,
|
|
[IEEE80211_AC_BK] = 1,
|
|
[IEEE80211_AC_VI] = 2,
|
|
[IEEE80211_AC_VO] = 3,
|
|
};
|
|
int ret;
|
|
int i;
|
|
|
|
mt76_dma_init(&dev->mt76);
|
|
|
|
init_waitqueue_head(&dev->mcu.wait);
|
|
skb_queue_head_init(&dev->mcu.res_q);
|
|
|
|
init_dummy_netdev(&dev->napi_dev);
|
|
netif_napi_add(&dev->napi_dev, &dev->napi, mt7603_dma_rx_poll, 64);
|
|
|
|
tasklet_init(&dev->tx_tasklet, mt7603_tx_tasklet, (unsigned long) dev);
|
|
tasklet_init(&dev->rx_tasklet, mt7603_rx_tasklet, (unsigned long) dev);
|
|
|
|
mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(wmm_queue_map); i++) {
|
|
ret = mt7603_init_tx_queue(dev, &dev->q_tx[i], wmm_queue_map[i],
|
|
MT_TX_RING_SIZE, false);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = mt7603_init_tx_queue(dev, &dev->q_tx[MT_TXQ_PSD],
|
|
MT_TX_HW_QUEUE_MGMT, MT_TX_RING_SIZE, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = mt7603_init_tx_queue(dev, &dev->q_tx[MT_TXQ_MCU],
|
|
MT_TX_HW_QUEUE_MCU, MT_MCU_RING_SIZE, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = mt7603_init_rx_queue(dev, &dev->mcu.q_rx, 1, MT_MCU_RING_SIZE,
|
|
MT_RX_BUF_SIZE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = mt7603_init_rx_queue(dev, &dev->q_rx, 0,
|
|
MT_RX_RING_SIZE, MT_RX_BUF_SIZE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mt7603_dma_rx_fill(dev, &dev->q_rx);
|
|
mt7603_dma_rx_fill(dev, &dev->mcu.q_rx);
|
|
|
|
mt76_wr(dev, MT_DELAY_INT_CFG, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mt7603_dma_cleanup(struct mt7603_dev *dev)
|
|
{
|
|
int i;
|
|
|
|
tasklet_kill(&dev->tx_tasklet);
|
|
tasklet_kill(&dev->rx_tasklet);
|
|
for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++)
|
|
mt76_tx_cleanup(dev, &dev->q_tx[i], true);
|
|
mt7603_rx_cleanup(dev, &dev->q_rx);
|
|
mt7603_rx_cleanup(dev, &dev->mcu.q_rx);
|
|
}
|