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@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 | |