1 /* $NetBSD: ld_nvme.c,v 1.19 2018/03/16 23:31:19 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (C) 2016 NONAKA Kimihiro <nonaka@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 1.19 2018/03/16 23:31:19 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_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 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 | LDF_NO_RND | LDF_MPSAFE; 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 int flags = BUF_ISWRITE(bp) ? 0 : NVME_NS_CTX_F_READ; 142 143 if (bp->b_flags & B_MEDIA_FUA) 144 flags |= NVME_NS_CTX_F_FUA; 145 146 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 147 bp, bp->b_data, bp->b_bcount, 148 sc->sc_ld.sc_secsize, bp->b_rawblkno, 149 flags, 150 ld_nvme_biodone); 151 } 152 153 static int 154 ld_nvme_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 155 { 156 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 157 158 return nvme_ns_dobio(sc->sc_nvme, sc->sc_nsid, sc, 159 NULL, data, blkcnt * ld->sc_secsize, 160 sc->sc_ld.sc_secsize, blkno, 161 NVME_NS_CTX_F_POLL, 162 ld_nvme_biodone); 163 } 164 165 static void 166 ld_nvme_biodone(void *xc, struct buf *bp, uint16_t cmd_status, uint32_t cdw0) 167 { 168 struct ld_nvme_softc *sc = xc; 169 uint16_t status = NVME_CQE_SC(cmd_status); 170 171 if (bp != NULL) { 172 if (status != NVME_CQE_SC_SUCCESS) { 173 bp->b_error = EIO; 174 bp->b_resid = bp->b_bcount; 175 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 176 } else { 177 bp->b_resid = 0; 178 } 179 lddone(&sc->sc_ld, bp); 180 } else { 181 if (status != NVME_CQE_SC_SUCCESS) { 182 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error\n"); 183 } 184 } 185 } 186 187 static int 188 ld_nvme_flush(struct ld_softc *ld, bool poll) 189 { 190 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 191 192 return nvme_ns_sync(sc->sc_nvme, sc->sc_nsid, 193 poll ? NVME_NS_CTX_F_POLL : 0); 194 } 195 196 static int 197 ld_nvme_getcache(struct ld_softc *ld, int *addr) 198 { 199 struct ld_nvme_softc *sc = device_private(ld->sc_dv); 200 201 return nvme_admin_getcache(sc->sc_nvme, addr); 202 } 203 204 static int 205 ld_nvme_ioctl(struct ld_softc *ld, u_long cmd, void *addr, int32_t flag, bool poll) 206 { 207 int error; 208 209 switch (cmd) { 210 case DIOCCACHESYNC: 211 error = ld_nvme_flush(ld, poll); 212 break; 213 214 case DIOCGCACHE: 215 error = ld_nvme_getcache(ld, (int *)addr); 216 break; 217 218 default: 219 error = EPASSTHROUGH; 220 break; 221 } 222 223 return error; 224 } 225 226 MODULE(MODULE_CLASS_DRIVER, ld_nvme, "ld,nvme,bufq_fcfs"); 227 228 #ifdef _MODULE 229 /* 230 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 231 * XXX it will be defined in the common-code module 232 */ 233 #undef CFDRIVER_DECL 234 #define CFDRIVER_DECL(name, class, attr) 235 #include "ioconf.c" 236 #endif 237 238 static int 239 ld_nvme_modcmd(modcmd_t cmd, void *opaque) 240 { 241 #ifdef _MODULE 242 /* 243 * We ignore the cfdriver_vec[] that ioconf provides, since 244 * the cfdrivers are attached already. 245 */ 246 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 247 #endif 248 int error = 0; 249 250 #ifdef _MODULE 251 switch (cmd) { 252 case MODULE_CMD_INIT: 253 error = config_init_component(no_cfdriver_vec, 254 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 255 break; 256 case MODULE_CMD_FINI: 257 error = config_fini_component(no_cfdriver_vec, 258 cfattach_ioconf_ld_nvme, cfdata_ioconf_ld_nvme); 259 break; 260 default: 261 error = ENOTTY; 262 break; 263 } 264 #endif 265 266 return error; 267 } 268