diff options
Diffstat (limited to 'src/spdk/lib/nvme/nvme_poll_group.c')
| -rw-r--r-- | src/spdk/lib/nvme/nvme_poll_group.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/spdk/lib/nvme/nvme_poll_group.c b/src/spdk/lib/nvme/nvme_poll_group.c new file mode 100644 index 000000000..291f55e63 --- /dev/null +++ b/src/spdk/lib/nvme/nvme_poll_group.c @@ -0,0 +1,164 @@ +/*- + * BSD LICENSE + * + * Copyright (c) Intel Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +#include "nvme_internal.h" + +struct spdk_nvme_poll_group * +spdk_nvme_poll_group_create(void *ctx) +{ + struct spdk_nvme_poll_group *group; + + group = calloc(1, sizeof(*group)); + if (group == NULL) { + return NULL; + } + + group->ctx = ctx; + STAILQ_INIT(&group->tgroups); + + return group; +} + +int +spdk_nvme_poll_group_add(struct spdk_nvme_poll_group *group, struct spdk_nvme_qpair *qpair) +{ + struct spdk_nvme_transport_poll_group *tgroup; + const struct spdk_nvme_transport *transport; + + if (nvme_qpair_get_state(qpair) != NVME_QPAIR_DISCONNECTED) { + return -EINVAL; + } + + STAILQ_FOREACH(tgroup, &group->tgroups, link) { + if (tgroup->transport == qpair->transport) { + break; + } + } + + /* See if a new transport has been added (dlopen style) and we need to update the poll group */ + if (!tgroup) { + transport = nvme_get_first_transport(); + while (transport != NULL) { + if (transport == qpair->transport) { + tgroup = nvme_transport_poll_group_create(transport); + if (tgroup == NULL) { + return -ENOMEM; + } + tgroup->group = group; + STAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); + break; + } + transport = nvme_get_next_transport(transport); + } + } + + return tgroup ? nvme_transport_poll_group_add(tgroup, qpair) : -ENODEV; +} + +int +spdk_nvme_poll_group_remove(struct spdk_nvme_poll_group *group, struct spdk_nvme_qpair *qpair) +{ + struct spdk_nvme_transport_poll_group *tgroup; + + STAILQ_FOREACH(tgroup, &group->tgroups, link) { + if (tgroup->transport == qpair->transport) { + return nvme_transport_poll_group_remove(tgroup, qpair); + } + } + + return -ENODEV; +} + +int +nvme_poll_group_connect_qpair(struct spdk_nvme_qpair *qpair) +{ + return nvme_transport_poll_group_connect_qpair(qpair); +} + +int +nvme_poll_group_disconnect_qpair(struct spdk_nvme_qpair *qpair) +{ + return nvme_transport_poll_group_disconnect_qpair(qpair); +} + +int64_t +spdk_nvme_poll_group_process_completions(struct spdk_nvme_poll_group *group, + uint32_t completions_per_qpair, spdk_nvme_disconnected_qpair_cb disconnected_qpair_cb) +{ + struct spdk_nvme_transport_poll_group *tgroup; + int64_t local_completions = 0, error_reason = 0, num_completions = 0; + + if (disconnected_qpair_cb == NULL) { + return -EINVAL; + } + + STAILQ_FOREACH(tgroup, &group->tgroups, link) { + local_completions = nvme_transport_poll_group_process_completions(tgroup, completions_per_qpair, + disconnected_qpair_cb); + if (local_completions < 0 && error_reason == 0) { + error_reason = local_completions; + } else { + num_completions += local_completions; + /* Just to be safe */ + assert(num_completions >= 0); + } + } + + return error_reason ? error_reason : num_completions; +} + +void * +spdk_nvme_poll_group_get_ctx(struct spdk_nvme_poll_group *group) +{ + return group->ctx; +} + +int +spdk_nvme_poll_group_destroy(struct spdk_nvme_poll_group *group) +{ + struct spdk_nvme_transport_poll_group *tgroup, *tmp_tgroup; + + STAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp_tgroup) { + STAILQ_REMOVE(&group->tgroups, tgroup, spdk_nvme_transport_poll_group, link); + if (nvme_transport_poll_group_destroy(tgroup) != 0) { + STAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); + return -EBUSY; + } + + } + + free(group); + + return 0; +} |