C++ (Cpp) sfxge_intr_alloc Examples

Example #1

File: sfxge_intr.c Project: ele7enxxh/dtrace-pf

static int
sfxge_intr_setup_msix(struct sfxge_softc *sc)
{
	struct sfxge_intr *intr;
	struct resource *resp;
	device_t dev;
	int count;
	int rid;

	dev = sc->dev;
	intr = &sc->intr;

	/* Check if MSI-X is available. */
	count = pci_msix_count(dev);
	if (count == 0)
		return (EINVAL);

	/* Limit the number of interrupts to the number of CPUs. */
	if (count > mp_ncpus)
		count = mp_ncpus;

	/* Not very likely these days... */
	if (count > EFX_MAXRSS)
		count = EFX_MAXRSS;

	rid = PCIR_BAR(4);
	resp = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
	if (resp == NULL)
		return (ENOMEM);

	if (pci_alloc_msix(dev, &count) != 0) {
		bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
		return (ENOMEM);
	}

	/* Allocate interrupt handlers. */
	if (sfxge_intr_alloc(sc, count) != 0) {
		bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
		pci_release_msi(dev);
		return (ENOMEM);
	}

	intr->type = EFX_INTR_MESSAGE;
	intr->n_alloc = count;
	intr->msix_res = resp;

	return (0);
}

Example #2

File: sfxge_intr.c Project: Digital-Chaos/freebsd

static int
sfxge_intr_setup_msix(struct sfxge_softc *sc)
{
	struct sfxge_intr *intr;
	struct resource *resp;
	device_t dev;
	int count;
	int rid;

	dev = sc->dev;
	intr = &sc->intr;

	/* Check if MSI-X is available. */
	count = pci_msix_count(dev);
	if (count == 0)
		return (EINVAL);

	/* Do not try to allocate more than already estimated EVQ maximum */
	KASSERT(sc->evq_max > 0, ("evq_max is zero"));
	count = MIN(count, sc->evq_max);

	rid = PCIR_BAR(4);
	resp = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
	if (resp == NULL)
		return (ENOMEM);

	if (pci_alloc_msix(dev, &count) != 0) {
		bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
		return (ENOMEM);
	}

	/* Allocate interrupt handlers. */
	if (sfxge_intr_alloc(sc, count) != 0) {
		bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
		pci_release_msi(dev);
		return (ENOMEM);
	}

	intr->type = EFX_INTR_MESSAGE;
	intr->n_alloc = count;
	intr->msix_res = resp;

	return (0);
}

Example #3

File: sfxge_intr.c Project: ele7enxxh/dtrace-pf

static int
sfxge_intr_setup_msi(struct sfxge_softc *sc)
{
	struct sfxge_intr_hdl *table;
	struct sfxge_intr *intr;
	device_t dev;
	int count;
	int error;

	dev = sc->dev;
	intr = &sc->intr;
	table = intr->table;

	/*
	 * Check if MSI is available.  All messages must be written to
	 * the same address and on x86 this means the IRQs have the
	 * same CPU affinity.  So we only ever allocate 1.
	 */
	count = pci_msi_count(dev) ? 1 : 0;
	if (count == 0)
		return (EINVAL);

	if ((error = pci_alloc_msi(dev, &count)) != 0) 
		return (ENOMEM);

	/* Allocate interrupt handler. */
	if (sfxge_intr_alloc(sc, count) != 0) {
		pci_release_msi(dev);
		return (ENOMEM);
	}

	intr->type = EFX_INTR_MESSAGE;
	intr->n_alloc = count;

	return (0);
}