From patchwork Wed Sep 20 08:07:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nitesh Shetty X-Patchwork-Id: 13392339 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED755CE79AD for ; Wed, 20 Sep 2023 08:59:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234041AbjITJAB (ORCPT ); Wed, 20 Sep 2023 05:00:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233957AbjITI7U (ORCPT ); Wed, 20 Sep 2023 04:59:20 -0400 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 014F6DC for ; Wed, 20 Sep 2023 01:58:37 -0700 (PDT) Received: from epcas5p2.samsung.com (unknown [182.195.41.40]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20230920085836epoutp02aa7a4aaea017fc54df8a8dce06e0b7f0~Gj7TKcU862629026290epoutp02t for ; Wed, 20 Sep 2023 08:58:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20230920085836epoutp02aa7a4aaea017fc54df8a8dce06e0b7f0~Gj7TKcU862629026290epoutp02t DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1695200316; bh=9HUxsYJcUqY59rvCQaWh3ErxEvPd5vF6B6n+YdK8rBY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QdG9TGW7/66r/O3y46Ise0DXwmqgH/cZVABF/GpaQCO2UuUf2ZgBRCOoUBO8WQNYZ coUzOOXAs2atoKnm9wwHqTL+C4XdIrD3BCTH5cuDXbiOsudKgnxtjJxhvkPWKkFeq1 uijWZoG/nO2HxIcNTf9HlaHB1R+FSyNgf70LVUJc= Received: from epsnrtp3.localdomain (unknown [182.195.42.164]) by epcas5p3.samsung.com (KnoxPortal) with ESMTP id 20230920085835epcas5p3ce375a9c404fc7a44189faa4cd55798f~Gj7ST4FA_1154311543epcas5p3U; Wed, 20 Sep 2023 08:58:35 +0000 (GMT) Received: from epsmges5p3new.samsung.com (unknown [182.195.38.175]) by epsnrtp3.localdomain (Postfix) with ESMTP id 4RrCB0319Vz4x9Px; Wed, 20 Sep 2023 08:58:32 +0000 (GMT) Received: from epcas5p3.samsung.com ( [182.195.41.41]) by epsmges5p3new.samsung.com (Symantec Messaging Gateway) with SMTP id 05.25.09635.834BA056; Wed, 20 Sep 2023 17:58:32 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20230920081529epcas5p33e1ff0e22817262b1cf749616a37d8a0~GjVp1XcJj1820618206epcas5p3e; Wed, 20 Sep 2023 08:15:29 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230920081529epsmtrp1289506647955b558123e9cf03eee4f55~GjVp0LLws2250022500epsmtrp1f; Wed, 20 Sep 2023 08:15:29 +0000 (GMT) X-AuditID: b6c32a4b-563fd700000025a3-a1-650ab4385642 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 91.0F.08742.12AAA056; Wed, 20 Sep 2023 17:15:29 +0900 (KST) Received: from green245.sa.corp.samsungelectronics.net (unknown [107.99.41.245]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20230920081525epsmtip1442b86aed4352b80f58575bee6705cb5~GjVmWJFMM2849128491epsmtip1Y; Wed, 20 Sep 2023 08:15:25 +0000 (GMT) From: Nitesh Shetty To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, nitheshshetty@gmail.com, anuj1072538@gmail.com, gost.dev@samsung.com, mcgrof@kernel.org, Nitesh Shetty , Hannes Reinecke , Kanchan Joshi , =?utf-8?q?Javier_Gonz=C3=A1lez?= , Anuj Gupta , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v16 07/12] nvme: add copy offload support Date: Wed, 20 Sep 2023 13:37:44 +0530 Message-Id: <20230920080756.11919-8-nj.shetty@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20230920080756.11919-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02Te1BUdRTH+d17ubuQ61yB6gdGLOtkAfFYefiDQMgYuYOMUj7KxglWuLIE +5jdJSmdEeQ1UDxEjFxeqzASjyARCFxwCBIUSEwCli2UYCGMEOQhNYTEskv53+d8zzm/8/jN YeMWRSwbdrRYwcjEglgeaU40djg4OKN6c8atrtoC1XZ34ujJ0gqBzuWs4qhqJJtE0x3zAOna 0gBqfVxgiobbmjHUciUXQxVVtzA0/usCC91amyFRbvsgQBMDSgy1ap3Q5dQyArW03iFQ/41C EpVcnWChz4eaSFTe9QxDmpwJgJp0iQA1rpTgqGZ6lkC3tdtR32qXacB2ulk5wqL7Hlwj6P4f 4+i6ynSSvl52llYPJ5B0adYFUzoz6TFJP5nQEvTszQGSzqqvBPT1ntP0Qt2rdJ1uBgvd+mGM r5ARRDIyLiOOkERGi6P8ePsPhb0T5unlxnfme6PdPK5YIGL8eIEhoc77omPXV8LjfiKIjVuX QgVyOc91j69MEqdguEKJXOHHY6SRsVIPqYtcIJLHiaNcxIzCh+/mtstzPTA8Rvjn8g9AWhgS X65bZCWA8j0ZwIwNKQ+oSr8MMoA524JSA5jWNosbjHkAR7p6jcZTAGcn1aabKYvLSyyDoxXA DI3GmJ+CweS/S9cNNpuknGDPGluvW1EJOPxWXboRhFNJBBysziL1T1lS3jBj7uIGE9RrsL0z faMEh/KBukvnTfUPQcoVZj/cppfNqLfgQtkQyxCyDd65pCP0jFN2MKmhADd0d98MzszYGTgQ 5nT8buzaEv7RVc8ysA18lJ1q5FOwIu9rUt8bpJIBVA4pgcHhD1O6s3F9DzjlAGtvuBpkW3ix uwYz1N0KM1d0mEHnwKbiTd4Bq2tVpIGt4eByopFpuDgzaVxpFoDFzffwHMBVPjeP8rl5lP+X VgG8ElgzUrkoipF7St3FzKn/vjlCIqoDG3fiuL8JjI3OubQDjA3aAWTjPCuOaKc5Y8GJFHz6 GSOThMniYhl5O/Bc3/d53ObFCMn6oYkVYXwPbzcPLy8vD293Lz7vZc50SlGkBRUlUDAxDCNl ZJt5GNvMJgHrKj4q9Iq/TV6N+iqocPS33viSXTMarvVu6iH/n7ECE9ekxPwXelX5B/y6O22m hnPf+9LvgZnOvY+zBUYMnRPHHMrPeNTQsNp74WZAgu3S8YMmc3NTWz7eN3F60EmbN58XwglK rguerRT7iw4nWx5pfNd1R+PA2yfevLuX0XxEHVEUHztz4plrjf1ZcOBkjuTMF6OvfPCTXcvP Afj4tVaNjzqootPqm7wB+6l70iCfKnlRXjjHxvb7KQvtG4oxOtBby51tGi8m7Ii7x0st+fap nJa+Rl8h25E20fq8LsrcGa566T5vrffp3l8mO3uE4+pg1fBf/keDu658d/DY4f73c096ppnw CLlQwHfEZXLBv98vK12wBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrJIsWRmVeSWpSXmKPExsWy7bCSnK7iKq5UgxU9vBbrTx1jtvj49TeL RdOEv8wWq+/2s1m8PvyJ0eLJgXZGi73vZrNa3Dywk8liz6JJTBYrVx9lsnh85zO7xdH/b9ks Jh26xmjx9OosJou9t7QtFrYtYbHYs/cki8XlXXPYLOYve8pu0X19B5vF8uP/mCxuTHjKaLHj SSOjxbbf85kt1r1+z2Jx4pa0xfm/x1kdpD12zrrL7nH+3kYWj8tnSz02repk89i8pN5j980G No/FfZNZPXqb37F5fHx6i8Xj/b6rbB59W1Yxemw+Xe3xeZOcx6Ynb5kC+KK4bFJSczLLUov0 7RK4Mt58P8JYMMenYvmTL+wNjMvtuhg5OSQETCS+fP/K3sXIxSEksJtR4vWU50wQCUmJZX+P MEPYwhIr/z2HKmpmktjy+hhQEQcHm4C2xOn/HCBxEYEuZonOne9YQBxmgcksEhsfnmME6RYW sJTo+jCVDcRmEVCVOHSskxXE5hWwkngycyIryCAJAX2J/vuCIGFOAWuJz0uus4PYQkAlpy/M Z4coF5Q4OfMJC0g5s4C6xPp5QiBhZgF5ieats5knMArOQlI1C6FqFpKqBYzMqxglUwuKc9Nz iw0LDPNSy/WKE3OLS/PS9ZLzczcxglODluYOxu2rPugdYmTiYDzEKMHBrCTCm6vGlSrEm5JY WZValB9fVJqTWnyIUZqDRUmcV/xFb4qQQHpiSWp2ampBahFMlomDU6qBqXXi5uLnitqKaxeq BVhXC7pvYU1wzeao7v25IeBz++TU5mrOJ8p1C+O95OY39eZZdvGr7F89Q0dlvf7C1y/dt2Tc ltHrbXzG82aS3xpNT49H9R3zOieFdUa7nUnbszK6ltN4U/7xb82rl3z0j+AVVJJzck34wPo1 Qm+tFmOC2vezPgzv09ZPeX6AtVy6uXoW40KjgqRPv9wkVt4yObK+4HfX9TsRXV9Fe48rr/o3 YXJopdL2iDIn6XWbtnx8dyC3VeRyrM8hjSafD48iUru+chi/veEQaDHXqK3pt3vX3RlJ7wPe ash95bH4+M/F8a1h+4RcSQsPy39uB/TTRWvFV9xRqm3qcvbdsdba2F+JpTgj0VCLuag4EQBw 0vYYfAMAAA== X-CMS-MailID: 20230920081529epcas5p33e1ff0e22817262b1cf749616a37d8a0 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230920081529epcas5p33e1ff0e22817262b1cf749616a37d8a0 References: <20230920080756.11919-1-nj.shetty@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Current design only supports single source range. We receive a request with REQ_OP_COPY_SRC. Parse this request which consists of src(1st) and dst(2nd) bios. Form a copy command (TP 4065) trace event support for nvme_copy_cmd. Set the device copy limits to queue limits. Reviewed-by: Hannes Reinecke Signed-off-by: Kanchan Joshi Signed-off-by: Nitesh Shetty Signed-off-by: Javier González Signed-off-by: Anuj Gupta --- drivers/nvme/host/constants.c | 1 + drivers/nvme/host/core.c | 79 +++++++++++++++++++++++++++++++++++ drivers/nvme/host/trace.c | 19 +++++++++ include/linux/blkdev.h | 1 + include/linux/nvme.h | 43 +++++++++++++++++-- 5 files changed, 140 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/host/constants.c b/drivers/nvme/host/constants.c index 20f46c230885..2f504a2b1fe8 100644 --- a/drivers/nvme/host/constants.c +++ b/drivers/nvme/host/constants.c @@ -19,6 +19,7 @@ static const char * const nvme_ops[] = { [nvme_cmd_resv_report] = "Reservation Report", [nvme_cmd_resv_acquire] = "Reservation Acquire", [nvme_cmd_resv_release] = "Reservation Release", + [nvme_cmd_copy] = "Copy Offload", [nvme_cmd_zone_mgmt_send] = "Zone Management Send", [nvme_cmd_zone_mgmt_recv] = "Zone Management Receive", [nvme_cmd_zone_append] = "Zone Append", diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 21783aa2ee8e..4522c702610b 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -763,6 +763,63 @@ static inline void nvme_setup_flush(struct nvme_ns *ns, cmnd->common.nsid = cpu_to_le32(ns->head->ns_id); } +static inline blk_status_t nvme_setup_copy_offload(struct nvme_ns *ns, + struct request *req, + struct nvme_command *cmnd) +{ + struct nvme_copy_range *range = NULL; + struct bio *bio; + u64 dst_lba = 0, src_lba, n_lba; + u16 nr_range = 1, control = 0, seg = 1; + + if (blk_rq_nr_phys_segments(req) != BLK_COPY_MAX_SEGMENTS) + return BLK_STS_IOERR; + + /* + * First bio contains information about source and last bio contains + * information about destination. + */ + __rq_for_each_bio(bio, req) { + if (seg == blk_rq_nr_phys_segments(req)) { + dst_lba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector); + if (n_lba != bio->bi_iter.bi_size >> ns->lba_shift) + return BLK_STS_IOERR; + } else { + src_lba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector); + n_lba = bio->bi_iter.bi_size >> ns->lba_shift; + } + seg++; + } + + if (req->cmd_flags & REQ_FUA) + control |= NVME_RW_FUA; + + if (req->cmd_flags & REQ_FAILFAST_DEV) + control |= NVME_RW_LR; + + memset(cmnd, 0, sizeof(*cmnd)); + cmnd->copy.opcode = nvme_cmd_copy; + cmnd->copy.nsid = cpu_to_le32(ns->head->ns_id); + cmnd->copy.control = cpu_to_le16(control); + cmnd->copy.sdlba = cpu_to_le64(dst_lba); + cmnd->copy.nr_range = 0; + + range = kmalloc_array(nr_range, sizeof(*range), + GFP_ATOMIC | __GFP_NOWARN); + if (!range) + return BLK_STS_RESOURCE; + + range[0].slba = cpu_to_le64(src_lba); + range[0].nlb = cpu_to_le16(n_lba - 1); + + req->special_vec.bv_page = virt_to_page(range); + req->special_vec.bv_offset = offset_in_page(range); + req->special_vec.bv_len = sizeof(*range) * nr_range; + req->rq_flags |= RQF_SPECIAL_PAYLOAD; + + return BLK_STS_OK; +} + static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd) { @@ -1005,6 +1062,11 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req) case REQ_OP_ZONE_APPEND: ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_zone_append); break; + case REQ_OP_COPY_SRC: + ret = nvme_setup_copy_offload(ns, req, cmd); + break; + case REQ_OP_COPY_DST: + return BLK_STS_IOERR; default: WARN_ON_ONCE(1); return BLK_STS_IOERR; @@ -1745,6 +1807,21 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) blk_queue_max_write_zeroes_sectors(queue, UINT_MAX); } +static void nvme_config_copy(struct gendisk *disk, struct nvme_ns *ns, + struct nvme_id_ns *id) +{ + struct nvme_ctrl *ctrl = ns->ctrl; + struct request_queue *q = disk->queue; + + if (!(ctrl->oncs & NVME_CTRL_ONCS_COPY)) { + blk_queue_max_copy_hw_sectors(q, 0); + return; + } + + blk_queue_max_copy_hw_sectors(q, nvme_lba_to_sect(ns, + le16_to_cpu(id->mssrl))); +} + static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b) { return uuid_equal(&a->uuid, &b->uuid) && @@ -1944,6 +2021,7 @@ static void nvme_update_disk_info(struct gendisk *disk, set_capacity_and_notify(disk, capacity); nvme_config_discard(disk, ns); + nvme_config_copy(disk, ns, id); blk_queue_max_write_zeroes_sectors(disk->queue, ns->ctrl->max_zeroes_sectors); } @@ -4654,6 +4732,7 @@ static inline void _nvme_check_size(void) BUILD_BUG_ON(sizeof(struct nvme_download_firmware) != 64); BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); BUILD_BUG_ON(sizeof(struct nvme_dsm_cmd) != 64); + BUILD_BUG_ON(sizeof(struct nvme_copy_command) != 64); BUILD_BUG_ON(sizeof(struct nvme_write_zeroes_cmd) != 64); BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); BUILD_BUG_ON(sizeof(struct nvme_get_log_page_command) != 64); diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c index 1c36fcedea20..82c6aef77c31 100644 --- a/drivers/nvme/host/trace.c +++ b/drivers/nvme/host/trace.c @@ -150,6 +150,23 @@ static const char *nvme_trace_read_write(struct trace_seq *p, u8 *cdw10) return ret; } +static const char *nvme_trace_copy(struct trace_seq *p, u8 *cdw10) +{ + const char *ret = trace_seq_buffer_ptr(p); + u64 sdlba = get_unaligned_le64(cdw10); + u8 nr_range = get_unaligned_le16(cdw10 + 8); + u16 control = get_unaligned_le16(cdw10 + 10); + u32 dsmgmt = get_unaligned_le32(cdw10 + 12); + u32 reftag = get_unaligned_le32(cdw10 + 16); + + trace_seq_printf(p, + "sdlba=%llu, nr_range=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u", + sdlba, nr_range, control, dsmgmt, reftag); + trace_seq_putc(p, 0); + + return ret; +} + static const char *nvme_trace_dsm(struct trace_seq *p, u8 *cdw10) { const char *ret = trace_seq_buffer_ptr(p); @@ -243,6 +260,8 @@ const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p, return nvme_trace_zone_mgmt_send(p, cdw10); case nvme_cmd_zone_mgmt_recv: return nvme_trace_zone_mgmt_recv(p, cdw10); + case nvme_cmd_copy: + return nvme_trace_copy(p, cdw10); default: return nvme_trace_common(p, cdw10); } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index e0a832a1c3a7..ce2009b693c8 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1226,6 +1226,7 @@ static inline unsigned int bdev_discard_granularity(struct block_device *bdev) /* maximum copy offload length, this is set to 128MB based on current testing */ #define BLK_COPY_MAX_BYTES (1 << 27) +#define BLK_COPY_MAX_SEGMENTS 2 static inline unsigned int bdev_max_copy_sectors(struct block_device *bdev) { diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 26dd3f859d9d..7744538c4ca4 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -337,7 +337,7 @@ struct nvme_id_ctrl { __u8 nvscc; __u8 nwpc; __le16 acwu; - __u8 rsvd534[2]; + __le16 ocfs; __le32 sgls; __le32 mnan; __u8 rsvd544[224]; @@ -365,6 +365,7 @@ enum { NVME_CTRL_ONCS_WRITE_ZEROES = 1 << 3, NVME_CTRL_ONCS_RESERVATIONS = 1 << 5, NVME_CTRL_ONCS_TIMESTAMP = 1 << 6, + NVME_CTRL_ONCS_COPY = 1 << 8, NVME_CTRL_VWC_PRESENT = 1 << 0, NVME_CTRL_OACS_SEC_SUPP = 1 << 0, NVME_CTRL_OACS_NS_MNGT_SUPP = 1 << 3, @@ -414,7 +415,10 @@ struct nvme_id_ns { __le16 npdg; __le16 npda; __le16 nows; - __u8 rsvd74[18]; + __le16 mssrl; + __le32 mcl; + __u8 msrc; + __u8 rsvd91[11]; __le32 anagrpid; __u8 rsvd96[3]; __u8 nsattr; @@ -831,6 +835,7 @@ enum nvme_opcode { nvme_cmd_resv_report = 0x0e, nvme_cmd_resv_acquire = 0x11, nvme_cmd_resv_release = 0x15, + nvme_cmd_copy = 0x19, nvme_cmd_zone_mgmt_send = 0x79, nvme_cmd_zone_mgmt_recv = 0x7a, nvme_cmd_zone_append = 0x7d, @@ -854,7 +859,8 @@ enum nvme_opcode { nvme_opcode_name(nvme_cmd_resv_release), \ nvme_opcode_name(nvme_cmd_zone_mgmt_send), \ nvme_opcode_name(nvme_cmd_zone_mgmt_recv), \ - nvme_opcode_name(nvme_cmd_zone_append)) + nvme_opcode_name(nvme_cmd_zone_append), \ + nvme_opcode_name(nvme_cmd_copy)) @@ -1031,6 +1037,36 @@ struct nvme_dsm_range { __le64 slba; }; +struct nvme_copy_command { + __u8 opcode; + __u8 flags; + __u16 command_id; + __le32 nsid; + __u64 rsvd2; + __le64 metadata; + union nvme_data_ptr dptr; + __le64 sdlba; + __u8 nr_range; + __u8 rsvd12; + __le16 control; + __le16 rsvd13; + __le16 dspec; + __le32 ilbrt; + __le16 lbat; + __le16 lbatm; +}; + +struct nvme_copy_range { + __le64 rsvd0; + __le64 slba; + __le16 nlb; + __le16 rsvd18; + __le32 rsvd20; + __le32 eilbrt; + __le16 elbat; + __le16 elbatm; +}; + struct nvme_write_zeroes_cmd { __u8 opcode; __u8 flags; @@ -1792,6 +1828,7 @@ struct nvme_command { struct nvme_download_firmware dlfw; struct nvme_format_cmd format; struct nvme_dsm_cmd dsm; + struct nvme_copy_command copy; struct nvme_write_zeroes_cmd write_zeroes; struct nvme_zone_mgmt_send_cmd zms; struct nvme_zone_mgmt_recv_cmd zmr;