C++ (Cpp) vchan_cyclic_callback Exemples

Exemple #1

Fichier : tegra210-adma.c Projet : 513855417/linux

static irqreturn_t tegra_adma_isr(int irq, void *dev_id)
{
	struct tegra_adma_chan *tdc = dev_id;
	unsigned long status;
	unsigned long flags;

	spin_lock_irqsave(&tdc->vc.lock, flags);

	status = tegra_adma_irq_clear(tdc);
	if (status == 0 || !tdc->desc) {
		spin_unlock_irqrestore(&tdc->vc.lock, flags);
		return IRQ_NONE;
	}

	vchan_cyclic_callback(&tdc->desc->vd);

	spin_unlock_irqrestore(&tdc->vc.lock, flags);

	return IRQ_HANDLED;
}

Exemple #2

static irqreturn_t st_fdma_irq_handler(int irq, void *dev_id)
{
    struct st_fdma_dev *fdev = dev_id;
    irqreturn_t ret = IRQ_NONE;
    struct st_fdma_chan *fchan = &fdev->chans[0];
    unsigned long int_sta, clr;

    int_sta = fdma_read(fdev, FDMA_INT_STA_OFST);
    clr = int_sta;

    for (; int_sta != 0 ; int_sta >>= 2, fchan++) {
        if (!(int_sta & (FDMA_INT_STA_CH | FDMA_INT_STA_ERR)))
            continue;

        spin_lock(&fchan->vchan.lock);
        st_fdma_ch_sta_update(fchan, int_sta);

        if (fchan->fdesc) {
            if (!fchan->fdesc->iscyclic) {
                list_del(&fchan->fdesc->vdesc.node);
                vchan_cookie_complete(&fchan->fdesc->vdesc);
                fchan->fdesc = NULL;
                fchan->status = DMA_COMPLETE;
            } else {
                vchan_cyclic_callback(&fchan->fdesc->vdesc);
            }

            /* Start the next descriptor (if available) */
            if (!fchan->fdesc)
                st_fdma_xfer_desc(fchan);
        }

        spin_unlock(&fchan->vchan.lock);
        ret = IRQ_HANDLED;
    }

    fdma_write(fdev, clr, FDMA_INT_CLR_OFST);

    return ret;
}