/* $NetBSD: ld_nvme.c,v 1.22.2.2 2020/09/27 10:30:16 martin Exp $ */ /*- * Copyright (C) 2016 NONAKA Kimihiro * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: ld_nvme.c,v 1.22.2.2 2020/09/27 10:30:16 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" struct ld_nvme_softc { struct ld_softc sc_ld; struct nvme_softc *sc_nvme; uint16_t sc_nsid; }; static int ld_nvme_match(device_t, cfdata_t, void *); static void ld_nvme_attach(device_t, device_t, void *); static int ld_nvme_detach(device_t, int); CFATTACH_DECL_NEW(ld_nvme, sizeof(struct ld_nvme_softc), ld_nvme_match, ld_nvme_attach, ld_nvme_detach, NULL); static int ld_nvme_start(struct ld_softc *, struct buf *); static int ld_nvme_dump(struct ld_softc *, void *, int, int); static int ld_nvme_flush(struct ld_softc *, bool); static int ld_nvme_getcache(struct ld_softc *, int *); static int ld_nvme_ioctl(struct ld_softc *, u_long, void *, int32_t, bool); static void ld_nvme_biodone(void *, struct buf *, uint16_t, uint32_t); static int ld_nvme_match(device_t parent, cfdata_t match, void *aux) { struct nvme_attach_args *naa = aux; if (naa->naa_nsid == 0) return 0; return 1; } static void ld_nvme_attach(device_t parent, device_t self, void *aux) { struct ld_nvme_softc *sc = device_private(self); struct ld_softc *ld = &sc->sc_ld; struct nvme_softc *nsc = device_private(parent); struct nvme_attach_args *naa = aux; struct nvme_namespace *ns; struct nvm_namespace_format *f; ld->sc_dv = self; sc->sc_nvme = nsc; sc->sc_nsid = naa->naa_nsid; aprint_naive("\n"); aprint_normal("\n"); ns = nvme_ns_get(sc->sc_nvme, sc->sc_nsid); KASSERT(ns); f = &ns->ident->lbaf[NVME_ID_NS_FLBAS(ns->ident->flbas)]; KASSERT(f->lbads >= 9); /* only valid LBS data sizes allowed here */ ld->sc_secsize = 1 << f->lbads; ld->sc_secperunit = ns->ident->nsze; ld->sc_maxxfer = naa->naa_maxphys; ld->sc_maxqueuecnt = naa->naa_qentries; ld->sc_start = ld_nvme_start; ld->sc_dump = ld_nvme_dump; ld->sc_ioctl = ld_nvme_ioctl; ld->sc_flags = LDF_ENABLED | LDF_NO_RND | LDF_MPSAFE; ld->sc_typename = kmem_asprintf("%s", naa->naa_typename); ldattach(ld, "fcfs"); } static int ld_nvme_detach(device_t self, int flags) { struct ld_nvme_softc *sc = device_private(self); struct ld_softc *ld = &sc->sc_ld; int rv; if ((rv = ldbegindetach(ld, flags)) != 0) return rv; ldenddetach(ld); kmem_free(ld->sc_typename, strlen(ld->sc_typename) + 1); nvme_ns_free(sc->sc_nvme, sc->sc_nsid); return 0; } static int ld_nvme_start(struct ld_softc *ld, struct buf *bp) { struct ld_nvme_softc *sc = device_private(ld->sc_dv); int flags = BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ; if (bp->b_flags & B_MEDIA_FUA) flags |= NVME_NS_CTX_F_FUA; return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, bp, bp->b_data, bp->b_bcount, sc->sc_ld.sc_secsize, bp->b_rawblkno, flags, ld_nvme_biodone); } static int ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) { struct ld_nvme_softc *sc = device_private(ld->sc_dv); return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, NULL, data, blkcnt * ld->sc_secsize, sc->sc_ld.sc_secsize, blkno, NVME_NS_CTX_F_POLL, ld_nvme_biodone); } static void ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status, uint32_t cdw0) { struct ld_nvme_softc *sc = xc; uint16_t status = NVME_CQE_SC(cmd_status); if (bp != NULL) { if (status != NVME_CQE_SC_SUCCESS) { bp->b_error = EIO; bp->b_resid = bp->b_bcount; aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); } else { bp->b_resid = 0; } lddone(&sc->sc_ld, bp); } else { if (status != NVME_CQE_SC_SUCCESS) { aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); } } } static int ld_nvme_flush(struct ld_softc *ld, bool poll) { struct ld_nvme_softc *sc = device_private(ld->sc_dv); return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, poll ? NVME_NS_CTX_F_POLL : 0); } static int ld_nvme_getcache(struct ld_softc *ld, int *addr) { struct ld_nvme_softc *sc = device_private(ld->sc_dv); return nvme_admin_getcache(sc->sc_nvme, addr); } static int ld_nvme_setcache(struct ld_softc *ld, int addr) { struct ld_nvme_softc *sc = device_private(ld->sc_dv); return nvme_admin_setcache(sc->sc_nvme, addr); } static int ld_nvme_ioctl(struct ld_softc *ld, u_long cmd, void *addr, int32_t flag, bool poll) { int error; switch (cmd) { case DIOCCACHESYNC: error = ld_nvme_flush(ld, poll); break; case DIOCGCACHE: error = ld_nvme_getcache(ld, (int *)addr); break; case DIOCSCACHE: error = ld_nvme_setcache(ld, *(int *)addr); break; default: error = EPASSTHROUGH; break; } return error; } MODULE(MODULE_CLASS_DRIVER, ld_nvme, "ld,nvme,bufq_fcfs"); #ifdef _MODULE /* * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" * XXX it will be defined in the common-code module */ #undef CFDRIVER_DECL #define CFDRIVER_DECL(name, class, attr) #include "ioconf.c" #endif static int ld_nvme_modcmd(modcmd_t cmd, void *opaque) { #ifdef _MODULE /* * We ignore the cfdriver_vec[] that ioconf provides, since * the cfdrivers are attached already. */ static struct cfdriver * const no_cfdriver_vec[] = { NULL }; #endif int error = 0; #ifdef _MODULE switch (cmd) { case MODULE_CMD_INIT: error = config_init_component(no_cfdriver_vec, cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); break; case MODULE_CMD_FINI: error = config_fini_component(no_cfdriver_vec, cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); break; default: error = ENOTTY; break; } #endif return error; }