1 /* $OpenBSD: nvme_pci.c,v 1.5 2016/11/10 11:56:41 mpi 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 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 74 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_NVME) 75 return (1); 76 77 return (0); 78 } 79 80 void 81 nvme_pci_attach(struct device *parent, struct device *self, void *aux) 82 { 83 struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self; 84 struct nvme_softc *sc = &psc->psc_nvme; 85 struct pci_attach_args *pa = aux; 86 pcireg_t maptype; 87 pci_intr_handle_t ih; 88 int msi = 1; 89 90 psc->psc_pc = pa->pa_pc; 91 sc->sc_dmat = pa->pa_dmat; 92 93 maptype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, NVME_PCI_BAR); 94 if (pci_mapreg_map(pa, NVME_PCI_BAR, maptype, 0, 95 &sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_ios, 0) != 0) { 96 printf(": unable to map registers\n"); 97 return; 98 } 99 100 if (pci_intr_map_msi(pa, &ih) != 0) { 101 if (pci_intr_map(pa, &ih) != 0) { 102 printf(": unable to map interrupt\n"); 103 goto unmap; 104 } 105 msi = 0; 106 } 107 108 sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO, 109 msi ? nvme_intr : nvme_intr_intx, sc, DEVNAME(sc)); 110 if (sc->sc_ih == NULL) { 111 printf(": unable to establish interrupt\n"); 112 goto unmap; 113 } 114 115 printf(": %s", pci_intr_string(pa->pa_pc, ih)); 116 if (nvme_attach(sc) != 0) { 117 /* error printed by nvme_attach() */ 118 goto disestablish; 119 } 120 121 return; 122 123 disestablish: 124 pci_intr_disestablish(pa->pa_pc, sc->sc_ih); 125 sc->sc_ih = NULL; 126 127 unmap: 128 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios); 129 sc->sc_ios = 0; 130 } 131 132 int 133 nvme_pci_detach(struct device *self, int flags) 134 { 135 return (0); 136 } 137 138 int 139 nvme_pci_activate(struct device *self, int act) 140 { 141 struct nvme_pci_softc *psc = (struct nvme_pci_softc *)self; 142 143 return (nvme_activate(&psc->psc_nvme, act)); 144 } 145