ld_nvme.c revision 1.11
1 /* $NetBSD: ld_nvme.c,v 1.11 2017/02/27 21:32:33 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 1.11 2017/02/27 21:32:33 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 *, bool); 64 static int ld_nvme_ioctl(struct ld_softc *, u_long, void *, int32_t, bool); 65 66 static void ld_nvme_biodone(void *, struct buf *, uint16_t); 67 static void ld_nvme_syncdone(void *, struct buf *, uint16_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 uint64_t nsze; 90 int error; 91 92 ld->sc_dv = self; 93 sc->sc_nvme = nsc; 94 sc->sc_nsid = naa->naa_nsid; 95 96 aprint_naive("\n"); 97 aprint_normal("\n"); 98 99 error = nvme_ns_identify(sc->sc_nvme, sc->sc_nsid); 100 if (error) { 101 aprint_error_dev(self, "couldn't identify namespace\n"); 102 return; 103 } 104 105 ns = nvme_ns_get(sc->sc_nvme, sc->sc_nsid); 106 KASSERT(ns); 107 nsze = lemtoh64(&ns->ident->nsze); 108 f = &ns->ident->lbaf[NVME_ID_NS_FLBAS(ns->ident->flbas)]; 109 110 ld->sc_secsize = 1 << f->lbads; 111 ld->sc_secperunit = nsze; 112 ld->sc_maxxfer = naa->naa_maxphys; 113 ld->sc_maxqueuecnt = naa->naa_qentries; 114 ld->sc_start = ld_nvme_start; 115 ld->sc_dump = ld_nvme_dump; 116 ld->sc_ioctl = ld_nvme_ioctl; 117 ld->sc_flags = LDF_ENABLED; 118 ldattach(ld, "fcfs"); 119 } 120 121 static int 122 ld_nvme_detach(device_t self, int flags) 123 { 124 struct ld_nvme_softc *sc = device_private(self); 125 struct ld_softc *ld = &sc->sc_ld; 126 int rv; 127 128 if ((rv = ldbegindetach(ld, flags)) != 0) 129 return rv; 130 ldenddetach(ld); 131 132 nvme_ns_free(sc->sc_nvme, sc->sc_nsid); 133 134 return 0; 135 } 136 137 static int 138 ld_nvme_start(struct ld_softc *ld, struct buf *bp) 139 { 140 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 141 142 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 143 bp, bp->b_data, bp->b_bcount, 144 sc->sc_ld.sc_secsize, bp->b_rawblkno, 145 BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ, 146 ld_nvme_biodone); 147 } 148 149 static int 150 ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 151 { 152 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 153 154 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 155 NULL, data, blkcnt * ld->sc_secsize, 156 sc->sc_ld.sc_secsize, blkno, 157 NVME_NS_CTX_F_POLL, 158 ld_nvme_biodone); 159 } 160 161 static void 162 ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status) 163 { 164 struct ld_nvme_softc *sc = xc; 165 uint16_t status = NVME_CQE_SC(cmd_status); 166 167 if (bp != NULL) { 168 if (status != NVME_CQE_SC_SUCCESS) { 169 bp->b_error = EIO; 170 bp->b_resid = bp->b_bcount; 171 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 172 } else { 173 bp->b_resid = 0; 174 } 175 lddone(&sc->sc_ld, bp); 176 } else { 177 if (status != NVME_CQE_SC_SUCCESS) { 178 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 179 } 180 } 181 } 182 183 static int 184 ld_nvme_flush(struct ld_softc *ld, bool poll) 185 { 186 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 187 188 return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, sc, 189 poll ? NVME_NS_CTX_F_POLL : 0, 190 ld_nvme_syncdone); 191 } 192 193 static int 194 ld_nvme_ioctl(struct ld_softc *ld, u_long cmd, void *addr, int32_t flag, bool poll) 195 { 196 int error; 197 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 198 199 switch (cmd) { 200 case DIOCCACHESYNC: 201 error = ld_nvme_flush(ld, poll); 202 break; 203 204 default: 205 error = EPASSTHROUGH; 206 break; 207 } 208 209 return error; 210 } 211 212 static void 213 ld_nvme_syncdone(void *xc, struct buf *bp, uint16_t cmd_status) 214 { 215 /* nothing to do */ 216 } 217 218 MODULE(MODULE_CLASS_DRIVER, ld_nvme, "ld,nvme"); 219 220 #ifdef _MODULE 221 /* 222 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 223 * XXX it will be defined in the common-code module 224 */ 225 #undef CFDRIVER_DECL 226 #define CFDRIVER_DECL(name, class, attr) 227 #include "ioconf.c" 228 #endif 229 230 static int 231 ld_nvme_modcmd(modcmd_t cmd, void *opaque) 232 { 233 #ifdef _MODULE 234 /* 235 * We ignore the cfdriver_vec[] that ioconf provides, since 236 * the cfdrivers are attached already. 237 */ 238 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 239 #endif 240 int error = 0; 241 242 #ifdef _MODULE 243 switch (cmd) { 244 case MODULE_CMD_INIT: 245 error = config_init_component(no_cfdriver_vec, 246 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 247 break; 248 case MODULE_CMD_FINI: 249 error = config_fini_component(no_cfdriver_vec, 250 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 251 break; 252 default: 253 error = ENOTTY; 254 break; 255 } 256 #endif 257 258 return error; 259 } 260
Indexes created Thu Oct 02 07:10:07 GMT 2025