Differential D28818 Diff 84667 sys/dev/virtio/pci/virtio_pci_legacy.c

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sys/dev/virtio/pci/virtio_pci_legacy.c

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#include "virtio_bus_if.h"		#include "virtio_bus_if.h"
#include "virtio_pci_if.h"		#include "virtio_pci_if.h"
#include "virtio_if.h"		#include "virtio_if.h"

struct vtpci_legacy_softc {		struct vtpci_legacy_softc {
device_t vtpci_dev;		device_t vtpci_dev;
struct vtpci_common vtpci_common;		struct vtpci_common vtpci_common;
		int vtpci_res_type;
struct resource *vtpci_res;		struct resource *vtpci_res;
struct resource *vtpci_msix_table_res;		struct resource *vtpci_msix_table_res;
struct resource *vtpci_msix_pba_res;		struct resource *vtpci_msix_pba_res;
};		};

static int vtpci_legacy_probe(device_t);		static int vtpci_legacy_probe(device_t);
static int vtpci_legacy_attach(device_t);		static int vtpci_legacy_attach(device_t);
static int vtpci_legacy_detach(device_t);		static int vtpci_legacy_detach(device_t);
▲ Show 20 Lines • Show All 156 Lines • ▼ Show 20 Lines	vtpci_legacy_attach(device_t dev)
int error;		int error;

sc = device_get_softc(dev);		sc = device_get_softc(dev);
sc->vtpci_dev = dev;		sc->vtpci_dev = dev;
vtpci_init(&sc->vtpci_common, dev, false);		vtpci_init(&sc->vtpci_common, dev, false);

error = vtpci_legacy_alloc_resources(sc);		error = vtpci_legacy_alloc_resources(sc);
if (error) {		if (error) {
device_printf(dev, "cannot map I/O space\n");		device_printf(dev, "cannot map I/O space nor memory space\n");
return (error);		return (error);
}		}

if (vtpci_is_msix_available(&sc->vtpci_common) &&		if (vtpci_is_msix_available(&sc->vtpci_common) &&
!vtpci_legacy_setup_msix(sc)) {		!vtpci_legacy_setup_msix(sc)) {
device_printf(dev, "cannot setup MSI-x resources\n");		device_printf(dev, "cannot setup MSI-x resources\n");
error = ENXIO;		error = ENXIO;
goto fail;		goto fail;
▲ Show 20 Lines • Show All 353 Lines • ▼ Show 20 Lines	bus_release_resource(dev, SYS_RES_MEMORY,
sc->vtpci_msix_table_res);		sc->vtpci_msix_table_res);
sc->vtpci_msix_table_res = NULL;		sc->vtpci_msix_table_res = NULL;
}		}
}		}

static int		static int
vtpci_legacy_alloc_resources(struct vtpci_legacy_softc *sc)		vtpci_legacy_alloc_resources(struct vtpci_legacy_softc *sc)
{		{
		const int res_types[] = { SYS_RES_IOPORT, SYS_RES_MEMORY };
device_t dev;		device_t dev;
int rid;		int rid, i;

dev = sc->vtpci_dev;		dev = sc->vtpci_dev;

		/*
		* Most hypervisors export the common configuration structure in IO
		* space, but some use memory space; try both.
		*/
		for (i = 0; nitems(res_types); i++) {
rid = PCIR_BAR(0);		rid = PCIR_BAR(0);
if ((sc->vtpci_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT,		sc->vtpci_res_type = res_types[i];
&rid, RF_ACTIVE)) == NULL)		sc->vtpci_res = bus_alloc_resource_any(dev, res_types[i], &rid,
		RF_ACTIVE);
		if (sc->vtpci_res != NULL)
		break;
		}
		if (sc->vtpci_res == NULL)
return (ENXIO);		return (ENXIO);

return (0);		return (0);
}		}

static void		static void
vtpci_legacy_free_resources(struct vtpci_legacy_softc *sc)		vtpci_legacy_free_resources(struct vtpci_legacy_softc *sc)
{		{
device_t dev;		device_t dev;

dev = sc->vtpci_dev;		dev = sc->vtpci_dev;

if (sc->vtpci_res != NULL) {		if (sc->vtpci_res != NULL) {
bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(0),		bus_release_resource(dev, sc->vtpci_res_type, PCIR_BAR(0),
sc->vtpci_res);		sc->vtpci_res);
sc->vtpci_res = NULL;		sc->vtpci_res = NULL;
}		}
}		}

static void		static void
vtpci_legacy_probe_and_attach_child(struct vtpci_legacy_softc *sc)		vtpci_legacy_probe_and_attach_child(struct vtpci_legacy_softc *sc)
{		{
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