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6ef63580 SK |
1 | /* |
2 | * Custom fio(1) engine that submits synchronous atomic writes to file. | |
3 | * | |
b2c77c25 SK |
4 | * Copyright (C) 2013 Fusion-io, Inc. |
5 | * Author: Santhosh Kumar Koundinya (skoundinya@fusionio.com). | |
6ef63580 SK |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the Free | |
15a6f166 | 9 | * Software Foundation; under version 2 of the License. |
6ef63580 SK |
10 | * |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License version | |
14 | * 2 for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License Version 2 | |
17 | * along with this program; if not see <http://www.gnu.org/licenses/> | |
18 | */ | |
19 | ||
20 | #include <stdlib.h> | |
21 | #include <stdint.h> | |
22 | ||
23 | #include "../fio.h" | |
24 | ||
b2c77c25 | 25 | #include <nvm/nvm_primitives.h> |
6ef63580 | 26 | |
b2c77c25 SK |
27 | struct fas_data { |
28 | nvm_handle_t nvm_handle; | |
29 | size_t xfer_buf_align; | |
30 | size_t xfer_buflen_align; | |
31 | size_t xfer_buflen_max; | |
32 | size_t sector_size; | |
6ef63580 SK |
33 | }; |
34 | ||
35 | static int queue(struct thread_data *td, struct io_u *io_u) | |
36 | { | |
37 | int rc; | |
b2c77c25 | 38 | struct fas_data *d = (struct fas_data *) io_u->file->engine_data; |
6ef63580 SK |
39 | |
40 | if (io_u->ddir != DDIR_WRITE) { | |
b2c77c25 SK |
41 | td_vmsg(td, EINVAL, "only writes supported", "io_u->ddir"); |
42 | rc = -EINVAL; | |
6ef63580 SK |
43 | goto out; |
44 | } | |
b2c77c25 SK |
45 | |
46 | if ((size_t) io_u->xfer_buf % d->xfer_buf_align) { | |
47 | td_vmsg(td, EINVAL, "unaligned data buffer", "io_u->xfer_buf"); | |
48 | rc = -EINVAL; | |
6ef63580 SK |
49 | goto out; |
50 | } | |
b2c77c25 SK |
51 | |
52 | if (io_u->xfer_buflen % d->xfer_buflen_align) { | |
53 | td_vmsg(td, EINVAL, "unaligned data size", "io_u->xfer_buflen"); | |
54 | rc = -EINVAL; | |
6ef63580 SK |
55 | goto out; |
56 | } | |
57 | ||
b2c77c25 SK |
58 | if (io_u->xfer_buflen > d->xfer_buflen_max) { |
59 | td_vmsg(td, EINVAL, "data too big", "io_u->xfer_buflen"); | |
60 | rc = -EINVAL; | |
61 | goto out; | |
6ef63580 | 62 | } |
6ef63580 | 63 | |
b2c77c25 SK |
64 | rc = nvm_atomic_write(d->nvm_handle, (uint64_t) io_u->xfer_buf, |
65 | io_u->xfer_buflen, io_u->offset / d->sector_size); | |
6ef63580 | 66 | if (rc == -1) { |
b2c77c25 SK |
67 | td_verror(td, errno, "nvm_atomic_write"); |
68 | rc = -errno; | |
6ef63580 | 69 | goto out; |
6ef63580 | 70 | } |
b2c77c25 | 71 | rc = FIO_Q_COMPLETED; |
6ef63580 SK |
72 | out: |
73 | if (rc < 0) | |
b2c77c25 | 74 | io_u->error = -rc; |
6ef63580 SK |
75 | |
76 | return rc; | |
77 | } | |
78 | ||
79 | static int open_file(struct thread_data *td, struct fio_file *f) | |
80 | { | |
81 | int rc; | |
b2c77c25 SK |
82 | int fio_unused close_file_rc; |
83 | struct fas_data *d; | |
84 | nvm_version_t nvm_version; | |
85 | nvm_capability_t nvm_capability[4]; | |
86 | ||
6ef63580 SK |
87 | |
88 | d = malloc(sizeof(*d)); | |
89 | if (!d) { | |
b2c77c25 SK |
90 | td_verror(td, ENOMEM, "malloc"); |
91 | rc = ENOMEM; | |
6ef63580 SK |
92 | goto error; |
93 | } | |
b2c77c25 | 94 | d->nvm_handle = -1; |
c11a9ddf | 95 | f->engine_data = (uintptr_t) d; |
6ef63580 SK |
96 | |
97 | rc = generic_open_file(td, f); | |
98 | ||
b2c77c25 SK |
99 | if (rc) |
100 | goto free_engine_data; | |
101 | ||
102 | /* Set the version of the library as seen when engine is compiled */ | |
103 | nvm_version.major = NVM_PRIMITIVES_API_MAJOR; | |
104 | nvm_version.minor = NVM_PRIMITIVES_API_MINOR; | |
105 | nvm_version.micro = NVM_PRIMITIVES_API_MICRO; | |
106 | ||
107 | d->nvm_handle = nvm_get_handle(f->fd, &nvm_version); | |
108 | if (d->nvm_handle == -1) { | |
109 | td_vmsg(td, errno, "nvm_get_handle failed", "nvm_get_handle"); | |
110 | rc = errno; | |
111 | goto close_file; | |
112 | } | |
113 | ||
114 | nvm_capability[0].cap_id = NVM_CAP_ATOMIC_WRITE_START_ALIGN_ID; | |
115 | nvm_capability[1].cap_id = NVM_CAP_ATOMIC_WRITE_MULTIPLICITY_ID; | |
116 | nvm_capability[2].cap_id = NVM_CAP_ATOMIC_WRITE_MAX_VECTOR_SIZE_ID; | |
117 | nvm_capability[3].cap_id = NVM_CAP_SECTOR_SIZE_ID; | |
118 | rc = nvm_get_capabilities(d->nvm_handle, nvm_capability, 4, 0); | |
119 | if (rc == -1) { | |
120 | td_vmsg(td, errno, "error in getting atomic write capabilities", "nvm_get_capabilities"); | |
121 | rc = errno; | |
122 | goto close_file; | |
123 | } else if (rc < 4) { | |
124 | td_vmsg(td, EINVAL, "couldn't get all the atomic write capabilities" , "nvm_get_capabilities"); | |
125 | rc = ECANCELED; | |
126 | goto close_file; | |
127 | } | |
128 | /* Reset rc to 0 because we got all capabilities we needed */ | |
129 | rc = 0; | |
130 | d->xfer_buf_align = nvm_capability[0].cap_value; | |
131 | d->xfer_buflen_align = nvm_capability[1].cap_value; | |
132 | d->xfer_buflen_max = d->xfer_buflen_align * nvm_capability[2].cap_value; | |
133 | d->sector_size = nvm_capability[3].cap_value; | |
134 | ||
6ef63580 SK |
135 | out: |
136 | return rc; | |
b2c77c25 SK |
137 | close_file: |
138 | close_file_rc = generic_close_file(td, f); | |
139 | free_engine_data: | |
140 | free(d); | |
6ef63580 SK |
141 | error: |
142 | f->fd = -1; | |
c11a9ddf | 143 | f->engine_data = 0; |
6ef63580 SK |
144 | goto out; |
145 | } | |
146 | ||
147 | static int close_file(struct thread_data *td, struct fio_file *f) | |
148 | { | |
b2c77c25 SK |
149 | struct fas_data *d = (struct fas_data *) f->engine_data; |
150 | ||
151 | if (d) { | |
152 | if (d->nvm_handle != -1) | |
153 | nvm_release_handle(d->nvm_handle); | |
154 | free(d); | |
c11a9ddf | 155 | f->engine_data = 0; |
6ef63580 SK |
156 | } |
157 | ||
158 | return generic_close_file(td, f); | |
159 | } | |
160 | ||
161 | static struct ioengine_ops ioengine = { | |
162 | .name = "fusion-aw-sync", | |
163 | .version = FIO_IOOPS_VERSION, | |
164 | .queue = queue, | |
165 | .open_file = open_file, | |
166 | .close_file = close_file, | |
167 | .get_file_size = generic_get_file_size, | |
168 | .flags = FIO_SYNCIO | FIO_RAWIO | FIO_MEMALIGN | |
169 | }; | |
170 | ||
6ef63580 SK |
171 | static void fio_init fio_fusion_aw_init(void) |
172 | { | |
173 | register_ioengine(&ioengine); | |
174 | } | |
175 | ||
176 | static void fio_exit fio_fusion_aw_exit(void) | |
177 | { | |
178 | unregister_ioengine(&ioengine); | |
179 | } |