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nvmet: add AEN configuration support

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AEN configuration via the 'Get Features' and 'Set Features' admin
command is mandatory, so we should be implemeting handling for it.

Signed-off-by: Hannes Reinecke <hare@suse.com>
[hch: use WRITE_ONCE, check for invalid values]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Christoph Hellwig
2018-05-30 15:04:47 +02:00
parent c16734ea98
commit c86b8f7b41
3 changed files with 33 additions and 3 deletions
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17
drivers/nvme/target/admin-cmd.c
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@@ -189,7 +189,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
id->ver = cpu_to_le32(ctrl->subsys->ver);
/* XXX: figure out what to do about RTD3R/RTD3 */
id->oaes = cpu_to_le32(1 << 8);
id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL);
id->ctratt = cpu_to_le32(1 << 0);
id->oacs = 0;
@@ -435,6 +435,16 @@ static void nvmet_execute_set_features(struct nvmet_req *req)
req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000);
nvmet_set_result(req, req->sq->ctrl->kato);
break;
case NVME_FEAT_ASYNC_EVENT:
val32 = le32_to_cpu(req->cmd->common.cdw10[1]);
if (val32 & ~NVMET_AEN_CFG_ALL) {
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
WRITE_ONCE(req->sq->ctrl->aen_enabled, val32);
nvmet_set_result(req, val32);
break;
case NVME_FEAT_HOST_ID:
status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
break;
@@ -473,9 +483,10 @@ static void nvmet_execute_get_features(struct nvmet_req *req)
break;
case NVME_FEAT_WRITE_ATOMIC:
break;
case NVME_FEAT_ASYNC_EVENT:
break;
#endif
case NVME_FEAT_ASYNC_EVENT:
nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled));
break;
case NVME_FEAT_VOLATILE_WC:
nvmet_set_result(req, 1);
break;