ld_nvme.c revision 1.7
1 /* $NetBSD: ld_nvme.c,v 1.7 2016/09/20 21:18:08 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (C) 2016 NONAKA Kimihiro <nonaka (at) netbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: ld_nvme.c,v 1.7 2016/09/20 21:18:08 jdolecek Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/device.h> 35 #include <sys/buf.h> 36 #include <sys/bufq.h> 37 #include <sys/disk.h> 38 #include <sys/kmem.h> 39 40 #include <dev/ldvar.h> 41 #include <dev/ic/nvmereg.h> 42 #include <dev/ic/nvmevar.h> 43 44 struct ld_nvme_softc { 45 struct ld_softc sc_ld; 46 struct nvme_softc *sc_nvme; 47 48 uint16_t sc_nsid; 49 }; 50 51 static int ld_nvme_match(device_t, cfdata_t, void *); 52 static void ld_nvme_attach(device_t, device_t, void *); 53 static int ld_nvme_detach(device_t, int); 54 55 CFATTACH_DECL_NEW(ld_nvme, sizeof(struct ld_nvme_softc), 56 ld_nvme_match, ld_nvme_attach, ld_nvme_detach, NULL); 57 58 static int ld_nvme_start(struct ld_softc *, struct buf *); 59 static int ld_nvme_dump(struct ld_softc *, void *, int, int); 60 static int ld_nvme_flush(struct ld_softc *, int); 61 62 static void ld_nvme_biodone(void *, struct buf *, uint16_t); 63 static void ld_nvme_syncdone(void *, struct buf *, uint16_t); 64 65 static int 66 ld_nvme_match(device_t parent, cfdata_t match, void *aux) 67 { 68 struct nvme_attach_args *naa = aux; 69 70 if (naa->naa_nsid == 0) 71 return 0; 72 73 return 1; 74 } 75 76 static void 77 ld_nvme_attach(device_t parent, device_t self, void *aux) 78 { 79 struct ld_nvme_softc *sc = device_private(self); 80 struct ld_softc *ld = &sc->sc_ld; 81 struct nvme_softc *nsc = device_private(parent); 82 struct nvme_attach_args *naa = aux; 83 struct nvme_namespace *ns; 84 struct nvm_namespace_format *f; 85 uint64_t nsze; 86 int error; 87 88 ld->sc_dv = self; 89 sc->sc_nvme = nsc; 90 sc->sc_nsid = naa->naa_nsid; 91 92 aprint_naive("\n"); 93 aprint_normal("\n"); 94 95 error = nvme_ns_identify(sc->sc_nvme, sc->sc_nsid); 96 if (error) { 97 aprint_error_dev(self, "couldn't identify namespace\n"); 98 return; 99 } 100 101 ns = nvme_ns_get(sc->sc_nvme, sc->sc_nsid); 102 KASSERT(ns); 103 nsze = lemtoh64(&ns->ident->nsze); 104 f = &ns->ident->lbaf[NVME_ID_NS_FLBAS(ns->ident->flbas)]; 105 106 ld->sc_secsize = 1 << f->lbads; 107 ld->sc_secperunit = nsze; 108 ld->sc_maxxfer = MAXPHYS; /* XXX set according to device */ 109 ld->sc_maxqueuecnt = naa->naa_qentries; /* XXX set to max allowed by device, not current config */ 110 ld->sc_start = ld_nvme_start; 111 ld->sc_dump = ld_nvme_dump; 112 ld->sc_flush = ld_nvme_flush; 113 ld->sc_flags = LDF_ENABLED; 114 ldattach(ld, "fcfs"); 115 } 116 117 static int 118 ld_nvme_detach(device_t self, int flags) 119 { 120 struct ld_nvme_softc *sc = device_private(self); 121 struct ld_softc *ld = &sc->sc_ld; 122 int rv; 123 124 if ((rv = ldbegindetach(ld, flags)) != 0) 125 return rv; 126 ldenddetach(ld); 127 128 nvme_ns_free(sc->sc_nvme, sc->sc_nsid); 129 130 return 0; 131 } 132 133 static int 134 ld_nvme_start(struct ld_softc *ld, struct buf *bp) 135 { 136 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 137 138 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 139 bp, bp->b_data, bp->b_bcount, 140 sc->sc_ld.sc_secsize, bp->b_rawblkno, 141 BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ, 142 ld_nvme_biodone); 143 } 144 145 static int 146 ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 147 { 148 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 149 150 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 151 NULL, data, blkcnt * ld->sc_secsize, 152 sc->sc_ld.sc_secsize, blkno, 153 NVME_NS_CTX_F_POLL, 154 ld_nvme_biodone); 155 } 156 157 static void 158 ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status) 159 { 160 struct ld_nvme_softc *sc = xc; 161 uint16_t status = NVME_CQE_SC(cmd_status); 162 163 if (bp != NULL) { 164 if (status != NVME_CQE_SC_SUCCESS) { 165 bp->b_error = EIO; 166 bp->b_resid = bp->b_bcount; 167 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 168 } else { 169 bp->b_resid = 0; 170 } 171 lddone(&sc->sc_ld, bp); 172 } else { 173 if (status != NVME_CQE_SC_SUCCESS) { 174 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 175 } 176 } 177 } 178 179 static int 180 ld_nvme_flush(struct ld_softc *ld, int flags) 181 { 182 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 183 184 /* wait for the sync to finish */ 185 return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, sc, 186 NVME_NS_CTX_F_POLL, ld_nvme_syncdone); 187 } 188 189 static void 190 ld_nvme_syncdone(void *xc, struct buf *bp, uint16_t cmd_status) 191 { 192 /* nothing to do */ 193 } 194
Indexes created Thu Oct 02 10:09:58 GMT 2025