drivers/net/wireless/mediatek/mt76/sdio_txrx.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/mediatek/mt76/sdio_txrx.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/mediatek/mt76/sdio_txrx.c
Extension
.c
Size
8919 bytes
Lines
391
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!dev->drv->rx_check || dev->drv->rx_check(dev, buf, len)) {
			e->skb = mt76s_build_rx_skb(buf, len,
						    round_up(len + 4, 4));
			if (!e->skb)
				break;

			if (q->queued + i + 1 == q->ndesc)
				break;
			i++;
		}
		buf += round_up(len + 4, 4);
	}
	put_page(page);

	spin_lock_bh(&q->lock);
	q->head = (q->head + i) % q->ndesc;
	q->queued += i;
	spin_unlock_bh(&q->lock);

	return i;
}

static int mt76s_rx_handler(struct mt76_dev *dev)
{
	struct mt76_sdio *sdio = &dev->sdio;
	struct mt76s_intr intr;
	int nframes = 0, ret;

	ret = sdio->parse_irq(dev, &intr);
	if (ret)
		return ret;

	trace_dev_irq(dev, intr.isr, 0);

	if (intr.isr & WHIER_RX0_DONE_INT_EN) {
		ret = mt76s_rx_run_queue(dev, 0, &intr);
		if (ret > 0) {
			mt76_worker_schedule(&sdio->net_worker);
			nframes += ret;
		}
	}

	if (intr.isr & WHIER_RX1_DONE_INT_EN) {
		ret = mt76s_rx_run_queue(dev, 1, &intr);
		if (ret > 0) {
			mt76_worker_schedule(&sdio->net_worker);
			nframes += ret;
		}
	}

	nframes += !!mt76s_refill_sched_quota(dev, intr.tx.wtqcr);

	return nframes;
}

static int
mt76s_tx_pick_quota(struct mt76_sdio *sdio, bool mcu, int buf_sz,
		    int *pse_size, int *ple_size)
{
	int pse_sz;

	pse_sz = DIV_ROUND_UP(buf_sz + sdio->sched.deficit,
			      sdio->sched.pse_page_size);

	if (mcu && sdio->hw_ver == MT76_CONNAC2_SDIO)
		pse_sz = 1;

	if (mcu) {
		if (sdio->sched.pse_mcu_quota < *pse_size + pse_sz)
			return -EBUSY;
	} else {
		if (sdio->sched.pse_data_quota < *pse_size + pse_sz ||
		    sdio->sched.ple_data_quota < *ple_size + 1)
			return -EBUSY;

		*ple_size = *ple_size + 1;
	}
	*pse_size = *pse_size + pse_sz;

	return 0;
}

static void
mt76s_tx_update_quota(struct mt76_sdio *sdio, bool mcu, int pse_size,
		      int ple_size)
{
	if (mcu) {
		sdio->sched.pse_mcu_quota -= pse_size;
	} else {
		sdio->sched.pse_data_quota -= pse_size;

Annotation

Implementation Notes