ld_nvme.c revision 1.22
1 /* $NetBSD: ld_nvme.c,v 1.22 2019/04/26 14:28:40 mlelstv 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 1.22 2019/04/26 14:28:40 mlelstv 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 *, bool); 64 static int ld_nvme_getcache(struct ld_softc *, int *); 65 static int ld_nvme_ioctl(struct ld_softc *, u_long, void *, int32_t, bool); 66 67 static void ld_nvme_biodone(void *, struct buf *, uint16_t, uint32_t); 68 69 static int 70 ld_nvme_match(device_t parent, cfdata_t match, void *aux) 71 { 72 struct nvme_attach_args *naa = aux; 73 74 if (naa->naa_nsid == 0) 75 return 0; 76 77 return 1; 78 } 79 80 static void 81 ld_nvme_attach(device_t parent, device_t self, void *aux) 82 { 83 struct ld_nvme_softc *sc = device_private(self); 84 struct ld_softc *ld = &sc->sc_ld; 85 struct nvme_softc *nsc = device_private(parent); 86 struct nvme_attach_args *naa = aux; 87 struct nvme_namespace *ns; 88 struct nvm_namespace_format *f; 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 f = &ns->ident->lbaf[NVME_ID_NS_FLBAS(ns->ident->flbas)]; 107 108 ld->sc_secsize = 1 << f->lbads; 109 ld->sc_secperunit = ns->ident->nsze; 110 ld->sc_maxxfer = naa->naa_maxphys; 111 ld->sc_maxqueuecnt = naa->naa_qentries; 112 ld->sc_start = ld_nvme_start; 113 ld->sc_dump = ld_nvme_dump; 114 ld->sc_ioctl = ld_nvme_ioctl; 115 ld->sc_flags = LDF_ENABLED | LDF_NO_RND | LDF_MPSAFE; 116 ld->sc_typename = kmem_asprintf("%s", naa->naa_typename); 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 kmem_free(ld->sc_typename, strlen(ld->sc_typename) + 1); 132 133 nvme_ns_free(sc->sc_nvme, sc->sc_nsid); 134 135 return 0; 136 } 137 138 static int 139 ld_nvme_start(struct ld_softc *ld, struct buf *bp) 140 { 141 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 142 int flags = BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ; 143 144 if (bp->b_flags & B_MEDIA_FUA) 145 flags |= NVME_NS_CTX_F_FUA; 146 147 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 148 bp, bp->b_data, bp->b_bcount, 149 sc->sc_ld.sc_secsize, bp->b_rawblkno, 150 flags, 151 ld_nvme_biodone); 152 } 153 154 static int 155 ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 156 { 157 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 158 159 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 160 NULL, data, blkcnt * ld->sc_secsize, 161 sc->sc_ld.sc_secsize, blkno, 162 NVME_NS_CTX_F_POLL, 163 ld_nvme_biodone); 164 } 165 166 static void 167 ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status, uint32_t cdw0) 168 { 169 struct ld_nvme_softc *sc = xc; 170 uint16_t status = NVME_CQE_SC(cmd_status); 171 172 if (bp != NULL) { 173 if (status != NVME_CQE_SC_SUCCESS) { 174 bp->b_error = EIO; 175 bp->b_resid = bp->b_bcount; 176 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 177 } else { 178 bp->b_resid = 0; 179 } 180 lddone(&sc->sc_ld, bp); 181 } else { 182 if (status != NVME_CQE_SC_SUCCESS) { 183 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 184 } 185 } 186 } 187 188 static int 189 ld_nvme_flush(struct ld_softc *ld, bool poll) 190 { 191 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 192 193 return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, 194 poll ? NVME_NS_CTX_F_POLL : 0); 195 } 196 197 static int 198 ld_nvme_getcache(struct ld_softc *ld, int *addr) 199 { 200 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 201 202 return nvme_admin_getcache(sc->sc_nvme, addr); 203 } 204 205 static int 206 ld_nvme_setcache(struct ld_softc *ld, int addr) 207 { 208 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 209 210 return nvme_admin_setcache(sc->sc_nvme, addr); 211 } 212 213 static int 214 ld_nvme_ioctl(struct ld_softc *ld, u_long cmd, void *addr, int32_t flag, bool poll) 215 { 216 int error; 217 218 switch (cmd) { 219 case DIOCCACHESYNC: 220 error = ld_nvme_flush(ld, poll); 221 break; 222 223 case DIOCGCACHE: 224 error = ld_nvme_getcache(ld, (int *)addr); 225 break; 226 227 case DIOCSCACHE: 228 error = ld_nvme_setcache(ld, *(int *)addr); 229 break; 230 231 default: 232 error = EPASSTHROUGH; 233 break; 234 } 235 236 return error; 237 } 238 239 MODULE(MODULE_CLASS_DRIVER, ld_nvme, "ld,nvme,bufq_fcfs"); 240 241 #ifdef _MODULE 242 /* 243 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 244 * XXX it will be defined in the common-code module 245 */ 246 #undef CFDRIVER_DECL 247 #define CFDRIVER_DECL(name, class, attr) 248 #include "ioconf.c" 249 #endif 250 251 static int 252 ld_nvme_modcmd(modcmd_t cmd, void *opaque) 253 { 254 #ifdef _MODULE 255 /* 256 * We ignore the cfdriver_vec[] that ioconf provides, since 257 * the cfdrivers are attached already. 258 */ 259 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 260 #endif 261 int error = 0; 262 263 #ifdef _MODULE 264 switch (cmd) { 265 case MODULE_CMD_INIT: 266 error = config_init_component(no_cfdriver_vec, 267 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 268 break; 269 case MODULE_CMD_FINI: 270 error = config_fini_component(no_cfdriver_vec, 271 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 272 break; 273 default: 274 error = ENOTTY; 275 break; 276 } 277 #endif 278 279 return error; 280 } 281
Indexes created Thu Oct 02 07:10:07 GMT 2025