Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/module.h> |
| 3 | #include <linux/backing-dev.h> |
| 4 | #include <linux/bio.h> |
| 5 | #include <linux/blkdev.h> |
| 6 | #include <linux/mm.h> |
| 7 | #include <linux/init.h> |
| 8 | #include <linux/slab.h> |
| 9 | #include <linux/workqueue.h> |
| 10 | #include <linux/smp.h> |
| 11 | |
| 12 | #include <linux/blk-mq.h> |
| 13 | #include "blk-mq.h" |
| 14 | #include "blk-mq-tag.h" |
| 15 | |
| 16 | static void blk_mq_sysfs_release(struct kobject *kobj) |
| 17 | { |
| 18 | } |
| 19 | |
Ming Lei | 6c8b232 | 2017-02-22 18:14:01 +0800 | [diff] [blame] | 20 | static void blk_mq_hw_sysfs_release(struct kobject *kobj) |
| 21 | { |
| 22 | struct blk_mq_hw_ctx *hctx = container_of(kobj, struct blk_mq_hw_ctx, |
| 23 | kobj); |
Ming Lei | 01388df | 2017-02-22 18:14:02 +0800 | [diff] [blame] | 24 | free_cpumask_var(hctx->cpumask); |
Ming Lei | 6c8b232 | 2017-02-22 18:14:01 +0800 | [diff] [blame] | 25 | kfree(hctx->ctxs); |
| 26 | kfree(hctx); |
| 27 | } |
| 28 | |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 29 | struct blk_mq_ctx_sysfs_entry { |
| 30 | struct attribute attr; |
| 31 | ssize_t (*show)(struct blk_mq_ctx *, char *); |
| 32 | ssize_t (*store)(struct blk_mq_ctx *, const char *, size_t); |
| 33 | }; |
| 34 | |
| 35 | struct blk_mq_hw_ctx_sysfs_entry { |
| 36 | struct attribute attr; |
| 37 | ssize_t (*show)(struct blk_mq_hw_ctx *, char *); |
| 38 | ssize_t (*store)(struct blk_mq_hw_ctx *, const char *, size_t); |
| 39 | }; |
| 40 | |
| 41 | static ssize_t blk_mq_sysfs_show(struct kobject *kobj, struct attribute *attr, |
| 42 | char *page) |
| 43 | { |
| 44 | struct blk_mq_ctx_sysfs_entry *entry; |
| 45 | struct blk_mq_ctx *ctx; |
| 46 | struct request_queue *q; |
| 47 | ssize_t res; |
| 48 | |
| 49 | entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr); |
| 50 | ctx = container_of(kobj, struct blk_mq_ctx, kobj); |
| 51 | q = ctx->queue; |
| 52 | |
| 53 | if (!entry->show) |
| 54 | return -EIO; |
| 55 | |
| 56 | res = -ENOENT; |
| 57 | mutex_lock(&q->sysfs_lock); |
| 58 | if (!blk_queue_dying(q)) |
| 59 | res = entry->show(ctx, page); |
| 60 | mutex_unlock(&q->sysfs_lock); |
| 61 | return res; |
| 62 | } |
| 63 | |
| 64 | static ssize_t blk_mq_sysfs_store(struct kobject *kobj, struct attribute *attr, |
| 65 | const char *page, size_t length) |
| 66 | { |
| 67 | struct blk_mq_ctx_sysfs_entry *entry; |
| 68 | struct blk_mq_ctx *ctx; |
| 69 | struct request_queue *q; |
| 70 | ssize_t res; |
| 71 | |
| 72 | entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr); |
| 73 | ctx = container_of(kobj, struct blk_mq_ctx, kobj); |
| 74 | q = ctx->queue; |
| 75 | |
| 76 | if (!entry->store) |
| 77 | return -EIO; |
| 78 | |
| 79 | res = -ENOENT; |
| 80 | mutex_lock(&q->sysfs_lock); |
| 81 | if (!blk_queue_dying(q)) |
| 82 | res = entry->store(ctx, page, length); |
| 83 | mutex_unlock(&q->sysfs_lock); |
| 84 | return res; |
| 85 | } |
| 86 | |
| 87 | static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj, |
| 88 | struct attribute *attr, char *page) |
| 89 | { |
| 90 | struct blk_mq_hw_ctx_sysfs_entry *entry; |
| 91 | struct blk_mq_hw_ctx *hctx; |
| 92 | struct request_queue *q; |
| 93 | ssize_t res; |
| 94 | |
| 95 | entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr); |
| 96 | hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj); |
| 97 | q = hctx->queue; |
| 98 | |
| 99 | if (!entry->show) |
| 100 | return -EIO; |
| 101 | |
| 102 | res = -ENOENT; |
| 103 | mutex_lock(&q->sysfs_lock); |
| 104 | if (!blk_queue_dying(q)) |
| 105 | res = entry->show(hctx, page); |
| 106 | mutex_unlock(&q->sysfs_lock); |
| 107 | return res; |
| 108 | } |
| 109 | |
| 110 | static ssize_t blk_mq_hw_sysfs_store(struct kobject *kobj, |
| 111 | struct attribute *attr, const char *page, |
| 112 | size_t length) |
| 113 | { |
| 114 | struct blk_mq_hw_ctx_sysfs_entry *entry; |
| 115 | struct blk_mq_hw_ctx *hctx; |
| 116 | struct request_queue *q; |
| 117 | ssize_t res; |
| 118 | |
| 119 | entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr); |
| 120 | hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj); |
| 121 | q = hctx->queue; |
| 122 | |
| 123 | if (!entry->store) |
| 124 | return -EIO; |
| 125 | |
| 126 | res = -ENOENT; |
| 127 | mutex_lock(&q->sysfs_lock); |
| 128 | if (!blk_queue_dying(q)) |
| 129 | res = entry->store(hctx, page, length); |
| 130 | mutex_unlock(&q->sysfs_lock); |
| 131 | return res; |
| 132 | } |
| 133 | |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 134 | static ssize_t blk_mq_hw_sysfs_nr_tags_show(struct blk_mq_hw_ctx *hctx, |
| 135 | char *page) |
Jens Axboe | bd166ef | 2017-01-17 06:03:22 -0700 | [diff] [blame] | 136 | { |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 137 | return sprintf(page, "%u\n", hctx->tags->nr_tags); |
Jens Axboe | bd166ef | 2017-01-17 06:03:22 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 140 | static ssize_t blk_mq_hw_sysfs_nr_reserved_tags_show(struct blk_mq_hw_ctx *hctx, |
| 141 | char *page) |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 142 | { |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 143 | return sprintf(page, "%u\n", hctx->tags->nr_reserved_tags); |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 144 | } |
| 145 | |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 146 | static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page) |
| 147 | { |
Jens Axboe | cb2da43 | 2014-04-09 10:53:21 -0600 | [diff] [blame] | 148 | unsigned int i, first = 1; |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 149 | ssize_t ret = 0; |
| 150 | |
Jens Axboe | cb2da43 | 2014-04-09 10:53:21 -0600 | [diff] [blame] | 151 | for_each_cpu(i, hctx->cpumask) { |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 152 | if (first) |
| 153 | ret += sprintf(ret + page, "%u", i); |
| 154 | else |
| 155 | ret += sprintf(ret + page, ", %u", i); |
| 156 | |
| 157 | first = 0; |
| 158 | } |
| 159 | |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 160 | ret += sprintf(ret + page, "\n"); |
| 161 | return ret; |
| 162 | } |
| 163 | |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 164 | static struct attribute *default_ctx_attrs[] = { |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 165 | NULL, |
| 166 | }; |
| 167 | |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 168 | static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_nr_tags = { |
| 169 | .attr = {.name = "nr_tags", .mode = S_IRUGO }, |
| 170 | .show = blk_mq_hw_sysfs_nr_tags_show, |
| 171 | }; |
| 172 | static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_nr_reserved_tags = { |
| 173 | .attr = {.name = "nr_reserved_tags", .mode = S_IRUGO }, |
| 174 | .show = blk_mq_hw_sysfs_nr_reserved_tags_show, |
| 175 | }; |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 176 | static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = { |
| 177 | .attr = {.name = "cpu_list", .mode = S_IRUGO }, |
| 178 | .show = blk_mq_hw_sysfs_cpus_show, |
| 179 | }; |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 180 | |
| 181 | static struct attribute *default_hw_ctx_attrs[] = { |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 182 | &blk_mq_hw_sysfs_nr_tags.attr, |
| 183 | &blk_mq_hw_sysfs_nr_reserved_tags.attr, |
Jens Axboe | 676141e | 2014-03-20 13:29:18 -0600 | [diff] [blame] | 184 | &blk_mq_hw_sysfs_cpus.attr, |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 185 | NULL, |
| 186 | }; |
| 187 | |
| 188 | static const struct sysfs_ops blk_mq_sysfs_ops = { |
| 189 | .show = blk_mq_sysfs_show, |
| 190 | .store = blk_mq_sysfs_store, |
| 191 | }; |
| 192 | |
| 193 | static const struct sysfs_ops blk_mq_hw_sysfs_ops = { |
| 194 | .show = blk_mq_hw_sysfs_show, |
| 195 | .store = blk_mq_hw_sysfs_store, |
| 196 | }; |
| 197 | |
| 198 | static struct kobj_type blk_mq_ktype = { |
| 199 | .sysfs_ops = &blk_mq_sysfs_ops, |
| 200 | .release = blk_mq_sysfs_release, |
| 201 | }; |
| 202 | |
| 203 | static struct kobj_type blk_mq_ctx_ktype = { |
| 204 | .sysfs_ops = &blk_mq_sysfs_ops, |
| 205 | .default_attrs = default_ctx_attrs, |
Ming Lei | 7417011 | 2015-01-29 20:17:26 +0800 | [diff] [blame] | 206 | .release = blk_mq_sysfs_release, |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 207 | }; |
| 208 | |
| 209 | static struct kobj_type blk_mq_hw_ktype = { |
| 210 | .sysfs_ops = &blk_mq_hw_sysfs_ops, |
| 211 | .default_attrs = default_hw_ctx_attrs, |
Ming Lei | 6c8b232 | 2017-02-22 18:14:01 +0800 | [diff] [blame] | 212 | .release = blk_mq_hw_sysfs_release, |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 213 | }; |
| 214 | |
Fengguang Wu | ee3c5db | 2014-05-30 10:31:13 -0600 | [diff] [blame] | 215 | static void blk_mq_unregister_hctx(struct blk_mq_hw_ctx *hctx) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 216 | { |
| 217 | struct blk_mq_ctx *ctx; |
| 218 | int i; |
| 219 | |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 220 | if (!hctx->nr_ctx) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 221 | return; |
| 222 | |
| 223 | hctx_for_each_ctx(hctx, ctx, i) |
| 224 | kobject_del(&ctx->kobj); |
| 225 | |
| 226 | kobject_del(&hctx->kobj); |
| 227 | } |
| 228 | |
Fengguang Wu | ee3c5db | 2014-05-30 10:31:13 -0600 | [diff] [blame] | 229 | static int blk_mq_register_hctx(struct blk_mq_hw_ctx *hctx) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 230 | { |
| 231 | struct request_queue *q = hctx->queue; |
| 232 | struct blk_mq_ctx *ctx; |
| 233 | int i, ret; |
| 234 | |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 235 | if (!hctx->nr_ctx) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 236 | return 0; |
| 237 | |
| 238 | ret = kobject_add(&hctx->kobj, &q->mq_kobj, "%u", hctx->queue_num); |
| 239 | if (ret) |
| 240 | return ret; |
| 241 | |
| 242 | hctx_for_each_ctx(hctx, ctx, i) { |
| 243 | ret = kobject_add(&ctx->kobj, &hctx->kobj, "cpu%u", ctx->cpu); |
| 244 | if (ret) |
| 245 | break; |
| 246 | } |
| 247 | |
| 248 | return ret; |
| 249 | } |
| 250 | |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 251 | static void __blk_mq_unregister_dev(struct device *dev, struct request_queue *q) |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 252 | { |
Andrey Vagin | 8515736 | 2013-12-06 09:06:41 +0400 | [diff] [blame] | 253 | struct blk_mq_hw_ctx *hctx; |
Ming Lei | 7ea5fe3 | 2017-02-22 18:14:00 +0800 | [diff] [blame] | 254 | int i; |
Andrey Vagin | 8515736 | 2013-12-06 09:06:41 +0400 | [diff] [blame] | 255 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 256 | lockdep_assert_held(&q->sysfs_lock); |
| 257 | |
Ming Lei | 6c8b232 | 2017-02-22 18:14:01 +0800 | [diff] [blame] | 258 | queue_for_each_hw_ctx(q, hctx, i) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 259 | blk_mq_unregister_hctx(hctx); |
| 260 | |
Omar Sandoval | 62ebce1 | 2017-01-31 14:53:21 -0800 | [diff] [blame] | 261 | blk_mq_debugfs_unregister_hctxs(q); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 262 | |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 263 | kobject_uevent(&q->mq_kobj, KOBJ_REMOVE); |
| 264 | kobject_del(&q->mq_kobj); |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 265 | kobject_put(&dev->kobj); |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 266 | |
| 267 | q->mq_sysfs_init_done = false; |
Jens Axboe | c0f3fd2 | 2016-08-02 08:45:44 -0600 | [diff] [blame] | 268 | } |
| 269 | |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 270 | void blk_mq_unregister_dev(struct device *dev, struct request_queue *q) |
Jens Axboe | c0f3fd2 | 2016-08-02 08:45:44 -0600 | [diff] [blame] | 271 | { |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 272 | mutex_lock(&q->sysfs_lock); |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 273 | __blk_mq_unregister_dev(dev, q); |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 274 | mutex_unlock(&q->sysfs_lock); |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 275 | } |
| 276 | |
Keith Busch | 868f2f0 | 2015-12-17 17:08:14 -0700 | [diff] [blame] | 277 | void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx) |
| 278 | { |
| 279 | kobject_init(&hctx->kobj, &blk_mq_hw_ktype); |
| 280 | } |
| 281 | |
Ming Lei | 7ea5fe3 | 2017-02-22 18:14:00 +0800 | [diff] [blame] | 282 | void blk_mq_sysfs_deinit(struct request_queue *q) |
| 283 | { |
| 284 | struct blk_mq_ctx *ctx; |
| 285 | int cpu; |
| 286 | |
| 287 | for_each_possible_cpu(cpu) { |
| 288 | ctx = per_cpu_ptr(q->queue_ctx, cpu); |
| 289 | kobject_put(&ctx->kobj); |
| 290 | } |
| 291 | kobject_put(&q->mq_kobj); |
| 292 | } |
| 293 | |
Ming Lei | 737f98c | 2017-02-22 18:13:59 +0800 | [diff] [blame] | 294 | void blk_mq_sysfs_init(struct request_queue *q) |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 295 | { |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 296 | struct blk_mq_ctx *ctx; |
Thomas Gleixner | 897bb0c | 2016-03-19 11:30:33 +0100 | [diff] [blame] | 297 | int cpu; |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 298 | |
| 299 | kobject_init(&q->mq_kobj, &blk_mq_ktype); |
| 300 | |
Thomas Gleixner | 897bb0c | 2016-03-19 11:30:33 +0100 | [diff] [blame] | 301 | for_each_possible_cpu(cpu) { |
| 302 | ctx = per_cpu_ptr(q->queue_ctx, cpu); |
Takashi Iwai | 06a41a9 | 2014-12-10 16:38:30 +0100 | [diff] [blame] | 303 | kobject_init(&ctx->kobj, &blk_mq_ctx_ktype); |
Thomas Gleixner | 897bb0c | 2016-03-19 11:30:33 +0100 | [diff] [blame] | 304 | } |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 305 | } |
| 306 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 307 | int __blk_mq_register_dev(struct device *dev, struct request_queue *q) |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 308 | { |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 309 | struct blk_mq_hw_ctx *hctx; |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 310 | int ret, i; |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 311 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 312 | WARN_ON_ONCE(!q->kobj.parent); |
| 313 | lockdep_assert_held(&q->sysfs_lock); |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 314 | |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 315 | ret = kobject_add(&q->mq_kobj, kobject_get(&dev->kobj), "%s", "mq"); |
| 316 | if (ret < 0) |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 317 | goto out; |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 318 | |
| 319 | kobject_uevent(&q->mq_kobj, KOBJ_ADD); |
| 320 | |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 321 | blk_mq_debugfs_register(q, kobject_name(&dev->kobj)); |
| 322 | |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 323 | queue_for_each_hw_ctx(q, hctx, i) { |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 324 | ret = blk_mq_register_hctx(hctx); |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 325 | if (ret) |
| 326 | break; |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 327 | } |
| 328 | |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 329 | if (ret) |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 330 | __blk_mq_unregister_dev(dev, q); |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 331 | else |
| 332 | q->mq_sysfs_init_done = true; |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 333 | |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 334 | out: |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 335 | return ret; |
| 336 | } |
| 337 | |
| 338 | int blk_mq_register_dev(struct device *dev, struct request_queue *q) |
| 339 | { |
| 340 | int ret; |
| 341 | |
| 342 | mutex_lock(&q->sysfs_lock); |
| 343 | ret = __blk_mq_register_dev(dev, q); |
| 344 | mutex_unlock(&q->sysfs_lock); |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 345 | |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 346 | return ret; |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 347 | } |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 348 | EXPORT_SYMBOL_GPL(blk_mq_register_dev); |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 349 | |
| 350 | void blk_mq_sysfs_unregister(struct request_queue *q) |
| 351 | { |
| 352 | struct blk_mq_hw_ctx *hctx; |
| 353 | int i; |
| 354 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 355 | mutex_lock(&q->sysfs_lock); |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 356 | if (!q->mq_sysfs_init_done) |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 357 | goto unlock; |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 358 | |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 359 | blk_mq_debugfs_unregister_hctxs(q); |
| 360 | |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 361 | queue_for_each_hw_ctx(q, hctx, i) |
| 362 | blk_mq_unregister_hctx(hctx); |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 363 | |
| 364 | unlock: |
| 365 | mutex_unlock(&q->sysfs_lock); |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | int blk_mq_sysfs_register(struct request_queue *q) |
| 369 | { |
| 370 | struct blk_mq_hw_ctx *hctx; |
| 371 | int i, ret = 0; |
| 372 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 373 | mutex_lock(&q->sysfs_lock); |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 374 | if (!q->mq_sysfs_init_done) |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 375 | goto unlock; |
Akinobu Mita | 4593fdb | 2015-09-27 02:09:20 +0900 | [diff] [blame] | 376 | |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 377 | blk_mq_debugfs_register_hctxs(q); |
| 378 | |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 379 | queue_for_each_hw_ctx(q, hctx, i) { |
| 380 | ret = blk_mq_register_hctx(hctx); |
| 381 | if (ret) |
| 382 | break; |
| 383 | } |
| 384 | |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame^] | 385 | unlock: |
| 386 | mutex_unlock(&q->sysfs_lock); |
| 387 | |
Jens Axboe | 67aec14 | 2014-05-30 08:25:36 -0600 | [diff] [blame] | 388 | return ret; |
| 389 | } |