1 /* $OpenBSD: nvme_pci.c,v 1.3 2016/04/14 11:18:32 dlg Exp $ */ 2 3 /* 4 * Copyright (c) 2014 David Gwynne <dlg@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/buf.h> 22 #include <sys/kernel.h> 23 #include <sys/malloc.h> 24 #include <sys/device.h> 25 #include <sys/timeout.h> 26 #include <sys/queue.h> 27 #include <sys/mutex.h> 28 #include <sys/pool.h> 29 30 #include <machine/bus.h> 31 32 #include <dev/pci/pcireg.h> 33 #include <dev/pci/pcivar.h> 34 #include <dev/pci/pcidevs.h> 35 36 #include <scsi/scsi_all.h> 37 #include <scsi/scsiconf.h> 38 39 #include <dev/ic/nvmereg.h> 40 #include <dev/ic/nvmevar.h> 41 42 #define NVME_PCI_BAR 0x10 43 #define NVME_PCI_INTERFACE 0x02 44 45 struct nvme_pci_softc { 46 struct nvme_softc psc_nvme; 47 pci_chipset_tag_t psc_pc; 48 }; 49 50 int nvme_pci_match(struct device *, void *, void *); 51 void nvme_pci_attach(struct device *, struct device *, void *); 52 int nvme_pci_detach(struct device *, int); 53 int nvme_pci_activate(struct device *, int); 54 55 struct cfattach nvme_pci_ca = { 56 sizeof(struct nvme_pci_softc), 57 nvme_pci_match, 58 nvme_pci_attach, 59 nvme_pci_detach, 60 nvme_pci_activate 61 }; 62 63 int 64 nvme_pci_match(struct device *parent, void *match, void *aux) 65 { 66 struct pci_attach_args *pa = aux; 67 68 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE && 69 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_NVM && 70 PCI_INTERFACE(pa->pa_class) == NVME_PCI_INTERFACE) 71 return (1); 72 73 return (0); 74 } 75 76 void 77 nvme_pci_attach(struct device *parent, struct device *self, void *aux) 78 { 79 struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self; 80 struct nvme_softc *sc = &psc->psc_nvme; 81 struct pci_attach_args *pa = aux; 82 pcireg_t maptype; 83 pci_intr_handle_t ih; 84 85 psc->psc_pc = pa->pa_pc; 86 sc->sc_dmat = pa->pa_dmat; 87 88 maptype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, NVME_PCI_BAR); 89 if (pci_mapreg_map(pa, NVME_PCI_BAR, maptype, 0, 90 &sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_ios, 0) != 0) { 91 printf(": unable to map registers\n"); 92 return; 93 } 94 95 if (pci_intr_map_msi(pa, &ih) != 0 && pci_intr_map(pa, &ih) != 0) { 96 printf(": unable to map interrupt\n"); 97 goto unmap; 98 } 99 100 sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO, 101 nvme_intr, sc, DEVNAME(sc)); 102 if (sc->sc_ih == NULL) { 103 printf(": unable to establish interrupt\n"); 104 goto unmap; 105 } 106 107 printf(": %s", pci_intr_string(pa->pa_pc, ih)); 108 if (nvme_attach(sc) != 0) { 109 /* error printed by nvme_attach() */ 110 goto disestablish; 111 } 112 113 return; 114 115 disestablish: 116 pci_intr_disestablish(pa->pa_pc, sc->sc_ih); 117 sc->sc_ih = NULL; 118 119 unmap: 120 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios); 121 sc->sc_ios = 0; 122 } 123 124 int 125 nvme_pci_detach(struct device *self, int flags) 126 { 127 return (0); 128 } 129 130 int 131 nvme_pci_activate(struct device *self, int act) 132 { 133 struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self; 134 135 return (nvme_activate(&psc->psc_nvme, act)); 136 } 137