ld_nvme.c revision 1.10
1 /* $NetBSD: ld_nvme.c,v 1.10 2016/11/01 14:39:38 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 1.10 2016/11/01 14:39:38 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 #include <sys/module.h> 40 41 #include <dev/ldvar.h> 42 #include <dev/ic/nvmereg.h> 43 #include <dev/ic/nvmevar.h> 44 45 #include "ioconf.h" 46 47 struct ld_nvme_softc { 48 struct ld_softc sc_ld; 49 struct nvme_softc *sc_nvme; 50 51 uint16_t sc_nsid; 52 }; 53 54 static int ld_nvme_match(device_t, cfdata_t, void *); 55 static void ld_nvme_attach(device_t, device_t, void *); 56 static int ld_nvme_detach(device_t, int); 57 58 CFATTACH_DECL_NEW(ld_nvme, sizeof(struct ld_nvme_softc), 59 ld_nvme_match, ld_nvme_attach, ld_nvme_detach, NULL); 60 61 static int ld_nvme_start(struct ld_softc *, struct buf *); 62 static int ld_nvme_dump(struct ld_softc *, void *, int, int); 63 static int ld_nvme_flush(struct ld_softc *, int); 64 65 static void ld_nvme_biodone(void *, struct buf *, uint16_t); 66 static void ld_nvme_syncdone(void *, struct buf *, uint16_t); 67 68 static int 69 ld_nvme_match(device_t parent, cfdata_t match, void *aux) 70 { 71 struct nvme_attach_args *naa = aux; 72 73 if (naa->naa_nsid == 0) 74 return 0; 75 76 return 1; 77 } 78 79 static void 80 ld_nvme_attach(device_t parent, device_t self, void *aux) 81 { 82 struct ld_nvme_softc *sc = device_private(self); 83 struct ld_softc *ld = &sc->sc_ld; 84 struct nvme_softc *nsc = device_private(parent); 85 struct nvme_attach_args *naa = aux; 86 struct nvme_namespace *ns; 87 struct nvm_namespace_format *f; 88 uint64_t nsze; 89 int error; 90 91 ld->sc_dv = self; 92 sc->sc_nvme = nsc; 93 sc->sc_nsid = naa->naa_nsid; 94 95 aprint_naive("\n"); 96 aprint_normal("\n"); 97 98 error = nvme_ns_identify(sc->sc_nvme, sc->sc_nsid); 99 if (error) { 100 aprint_error_dev(self, "couldn't identify namespace\n"); 101 return; 102 } 103 104 ns = nvme_ns_get(sc->sc_nvme, sc->sc_nsid); 105 KASSERT(ns); 106 nsze = lemtoh64(&ns->ident->nsze); 107 f = &ns->ident->lbaf[NVME_ID_NS_FLBAS(ns->ident->flbas)]; 108 109 ld->sc_secsize = 1 << f->lbads; 110 ld->sc_secperunit = nsze; 111 ld->sc_maxxfer = naa->naa_maxphys; 112 ld->sc_maxqueuecnt = naa->naa_qentries; 113 ld->sc_start = ld_nvme_start; 114 ld->sc_dump = ld_nvme_dump; 115 ld->sc_flush = ld_nvme_flush; 116 ld->sc_flags = LDF_ENABLED; 117 ldattach(ld, "fcfs"); 118 } 119 120 static int 121 ld_nvme_detach(device_t self, int flags) 122 { 123 struct ld_nvme_softc *sc = device_private(self); 124 struct ld_softc *ld = &sc->sc_ld; 125 int rv; 126 127 if ((rv = ldbegindetach(ld, flags)) != 0) 128 return rv; 129 ldenddetach(ld); 130 131 nvme_ns_free(sc->sc_nvme, sc->sc_nsid); 132 133 return 0; 134 } 135 136 static int 137 ld_nvme_start(struct ld_softc *ld, struct buf *bp) 138 { 139 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 140 141 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 142 bp, bp->b_data, bp->b_bcount, 143 sc->sc_ld.sc_secsize, bp->b_rawblkno, 144 BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ, 145 ld_nvme_biodone); 146 } 147 148 static int 149 ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 150 { 151 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 152 153 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 154 NULL, data, blkcnt * ld->sc_secsize, 155 sc->sc_ld.sc_secsize, blkno, 156 NVME_NS_CTX_F_POLL, 157 ld_nvme_biodone); 158 } 159 160 static void 161 ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status) 162 { 163 struct ld_nvme_softc *sc = xc; 164 uint16_t status = NVME_CQE_SC(cmd_status); 165 166 if (bp != NULL) { 167 if (status != NVME_CQE_SC_SUCCESS) { 168 bp->b_error = EIO; 169 bp->b_resid = bp->b_bcount; 170 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 171 } else { 172 bp->b_resid = 0; 173 } 174 lddone(&sc->sc_ld, bp); 175 } else { 176 if (status != NVME_CQE_SC_SUCCESS) { 177 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 178 } 179 } 180 } 181 182 static int 183 ld_nvme_flush(struct ld_softc *ld, int flags) 184 { 185 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 186 187 /* wait for the sync to finish */ 188 return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, sc, 189 (flags & LDFL_POLL) ? NVME_NS_CTX_F_POLL : 0, 190 ld_nvme_syncdone); 191 } 192 193 static void 194 ld_nvme_syncdone(void *xc, struct buf *bp, uint16_t cmd_status) 195 { 196 /* nothing to do */ 197 } 198 199 MODULE(MODULE_CLASS_DRIVER, ld_nvme, "ld,nvme"); 200 201 #ifdef _MODULE 202 /* 203 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 204 * XXX it will be defined in the common-code module 205 */ 206 #undef CFDRIVER_DECL 207 #define CFDRIVER_DECL(name, class, attr) 208 #include "ioconf.c" 209 #endif 210 211 static int 212 ld_nvme_modcmd(modcmd_t cmd, void *opaque) 213 { 214 #ifdef _MODULE 215 /* 216 * We ignore the cfdriver_vec[] that ioconf provides, since 217 * the cfdrivers are attached already. 218 */ 219 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 220 #endif 221 int error = 0; 222 223 #ifdef _MODULE 224 switch (cmd) { 225 case MODULE_CMD_INIT: 226 error = config_init_component(no_cfdriver_vec, 227 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 228 break; 229 case MODULE_CMD_FINI: 230 error = config_fini_component(no_cfdriver_vec, 231 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 232 break; 233 default: 234 error = ENOTTY; 235 break; 236 } 237 #endif 238 239 return error; 240 } 241
Indexes created Thu Oct 02 07:10:07 GMT 2025