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/* $OpenBSD: nvme_pci.c,v 1.9 2021/05/31 04:13:42 dlg Exp $ */
/*
* Copyright (c) 2014 David Gwynne <dlg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/timeout.h>
#include <sys/queue.h>
#include <sys/mutex.h>
#include <sys/pool.h>
#include <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <dev/ic/nvmereg.h>
#include <dev/ic/nvmevar.h>
#define NVME_PCI_BAR 0x10
#define NVME_PCI_INTERFACE 0x02
struct nvme_pci_softc {
struct nvme_softc psc_nvme;
pci_chipset_tag_t psc_pc;
};
int nvme_pci_match(struct device *, void *, void *);
void nvme_pci_attach(struct device *, struct device *, void *);
int nvme_pci_detach(struct device *, int);
int nvme_pci_activate(struct device *, int);
struct cfattach nvme_pci_ca = {
sizeof(struct nvme_pci_softc),
nvme_pci_match,
nvme_pci_attach,
nvme_pci_detach,
nvme_pci_activate
};
int
nvme_pci_match(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_NVM &&
PCI_INTERFACE(pa->pa_class) == NVME_PCI_INTERFACE)
return (1);
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE &&
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_NVME1 ||
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_NVME2))
return (1);
return (0);
}
static const struct pci_matchid nvme_msi_blacklist[] = {
{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_OPTANE },
};
void
nvme_pci_attach(struct device *parent, struct device *self, void *aux)
{
struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self;
struct nvme_softc *sc = &psc->psc_nvme;
struct pci_attach_args *pa = aux;
pcireg_t maptype;
pci_intr_handle_t ih;
int msi = 1;
psc->psc_pc = pa->pa_pc;
sc->sc_dmat = pa->pa_dmat;
printf(": ");
if (pci_matchbyid(pa, nvme_msi_blacklist, nitems(nvme_msi_blacklist)))
CLR(pa->pa_flags, PCI_FLAGS_MSI_ENABLED);
maptype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, NVME_PCI_BAR);
if (pci_mapreg_map(pa, NVME_PCI_BAR, maptype, 0,
&sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_ios, 0) != 0) {
printf("unable to map registers\n");
return;
}
if (pci_intr_map_msix(pa, 0, &ih) != 0 &&
pci_intr_map_msi(pa, &ih) != 0) {
if (pci_intr_map(pa, &ih) != 0) {
printf("unable to map interrupt\n");
goto unmap;
}
msi = 0;
}
sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO,
msi ? nvme_intr : nvme_intr_intx, sc, DEVNAME(sc));
if (sc->sc_ih == NULL) {
printf("unable to establish interrupt\n");
goto unmap;
}
printf("%s, ", pci_intr_string(pa->pa_pc, ih));
if (nvme_attach(sc) != 0) {
/* error printed by nvme_attach() */
goto disestablish;
}
return;
disestablish:
pci_intr_disestablish(pa->pa_pc, sc->sc_ih);
sc->sc_ih = NULL;
unmap:
bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
sc->sc_ios = 0;
}
int
nvme_pci_detach(struct device *self, int flags)
{
return (0);
}
int
nvme_pci_activate(struct device *self, int act)
{
struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self;
return (nvme_activate(&psc->psc_nvme, act));
}
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