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Tue, 27 Aug 2024 02:14:31 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20240826171430epcas5p3d8e34a266ced7b3ea0df2a11b83292ae~vVqoOYF0n1118211182epcas5p3m; Mon, 26 Aug 2024 17:14:30 +0000 (GMT) Received: from epsmgmcp1.samsung.com (unknown [182.195.42.82]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20240826171430epsmtrp2a8d6ae6dc2221cc5f2dd7ba34e9c1b7e~vVqoLASCB3048030480epsmtrp2m; Mon, 26 Aug 2024 17:14:30 +0000 (GMT) X-AuditID: b6c32a4b-879fa700000025aa-5b-66ccb7f6a7a5 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgmcp1.samsung.com (Symantec Messaging Gateway) with SMTP id DF.51.19367.6F7BCC66; Tue, 27 Aug 2024 02:14:30 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20240826171426epsmtip243cd9f8a60035672848defe83d52dea1~vVqkKvu2X0834608346epsmtip2P; Mon, 26 Aug 2024 17:14:26 +0000 (GMT) From: Kanchan Joshi To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, martin.petersen@oracle.com, James.Bottomley@HansenPartnership.com, brauner@kernel.org, jack@suse.cz, jaegeuk@kernel.org, jlayton@kernel.org, chuck.lever@oracle.com, bvanassche@acm.org Cc: linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, gost.dev@samsung.com, vishak.g@samsung.com, javier.gonz@samsung.com, Kanchan Joshi , Nitesh Shetty , Hui Qi Subject: [PATCH v4 5/5] nvme: enable FDP support Date: Mon, 26 Aug 2024 22:36:06 +0530 Message-Id: <20240826170606.255718-6-joshi.k@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240826170606.255718-1-joshi.k@samsung.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02Ta0xTZxjHcy6cHgydB9DwShZgNW4CQlug5a0T0Uj0IEQxyxbih9UODheB tvS06pzbCGxMBORihFmGEAWcVVbucqtTroGhEBDlIgwYpAF0ol1gCBtrKTq//Z7n/f/f53ne C4k5vCScyVi5mlHJZfE8YhNe1+ru7rV0pydKYHyMwVtjWQScb32FwLyFZQyujRlROHyvAYU3 b7WjsKGsnAML8lNQOK3XYrAyi4R/PDVx4HKZjgPb154TMLflMQINI56w/9oh2GzowmFR2QwH pj+pJ+CNzn9RWLdShMFf5l/gsFf7E2efEz3wKITuHa/E6bzcboIeeKChq3RpBF1d8i3dVGxC 6abhJIJ+OTOC0xdrdAjdU9zGoU1VLmF2x+P2xDCySEblxsgjFJGx8ugAXsgn0gNSkVgg9BJK oD/PTS5LYAJ4QaFhXgdj480z89xOyeI15lSYjGV5/L17VAqNmnGLUbDqAB6jjIxX+im9WVkC q5FHe8sZ9W6hQOAjMgtPxMXUau8RyruiM0OLGXgSctPzAmJLAsoPzOpT0QvIJtKBakJAxWgt xxq8QkDW7SHsbTBbch97Y3ky2EZYFxoQ8FtNH24NTAgw9iyaVSRJUO6g75LGkt9CpaCgsvz1 ugOjRlDQNPszYhE5UgKQvMJadsWpHaCtQGdjYS4lAdlp11BrNVdwpX+JY2FbajdYW3jBsWrs QdeVadzCmFmTUluw3iqg0m1BQUfFhjkINGc/3GBHMNdZw7GyMzD9aSCsHAcmpiZwK58D9dUX bawcCJJWh2wsfWLmYfSNfGut90DmyjRqSQOKC86nOljVH4Dx3JkNpxOY/LFkg2mgL+vYON9M BEzWZuHZiKv2nRG074yg/b9aMYLpkG2Mkk2IZliR0lfOnH57sxGKhCpk/e17hNQjUxML3i0I SiItCCAx3hauy0BXlAM3UvblWUalkKo08QzbgojMZ5yDOW+NUJg/j1wtFfpJBH5isdhP4isW 8py4898XRjpQ0TI1E8cwSkb1xoeSts5J6GdTpdXpHn9nf9zkiiVutTPwlzprugqyxPnjnGeD k6k7jRnnJzM8V45q/FcLjY/0oz5BY4sD+xxPYqeKYurmsJHQz/Vh5Dfh+4/xt5Uasqs7bRr/ Gv19+PKh5JD2qKsZm6OMXlUfipolhYlnDpb2Jhy5/1Hp3jt9uszrVXI7Q+BJ4z/LxGhrovM5 +wf81l2b1ca00IfhXPf0uz6G/V2vG3cdWT1+2D7vrDS4JPN5/7PgxeuNzTmVrFNvrO/t1aLi VP4Pvm02hhxy+xeD/uj7sxV1Hdtd3Ce/K38qNZ3+WhJ4QB/sm/rrV1eHmMs7Anb2hed7j0Yk dq98ivUdPnYCS55rn13r5uFsjEzogalY2X/d+SZVhAQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA02Ra1BMYRjHveeczjk14thuh9jG5lZRGZle5PaFM2gGYwxhONpTYVs7u20u MZaIrYhQOqEk2+w2SvebdthKUyJdVVNoSUiKmmSiZdsx07f/8/x+8/w/PCQqeITNIg9Jwzi5 lJWIcBussELksmSkqC7IWx3pAjO74nDYV/EDwITBXyg0dfUisP1JCQK1mVUILNE8JGByYiQC P2TzKMyJI+H7ziEC/tLoCFhl6sdhvKEVwPIOD9iYthE+Lq/BYIqmh4Axr4txmFE9jsDCsRQU ZvUNYLCev02sc2Kamjcz9W9yMCYhvhZnml4omVydGmfy0s8wZalDCFPWrsKZ7z0dGHMlXweY utRKghnKFW6dGmDjJ+Ykh8I5udeaAzYhBfwTXKZffrxtJBZTAa1HNLAmacqHft1SiUcDG1JA FQH6y9Bn3AKc6MjWUcKS7WjteC9hkb4DOtY4ZhUNSBKn3OhX15XmvT11HaHPdedj5gGlPiJ0 V3I+YpbsKG/63JjCfAij5tOVyTorc7alVtBX1WmIpcCFTmr8OVFmTa2kTYMDE1nwz9HWZRAW fwZdk/QBM2f0nx9ZkIxeBRQ/CfGTUCpAdMCBkylCg0MDZUs9FWyoQikN9gw8GpoLJp7qvr0Y aLL/eBoAQgIDoElUZG8rbKoJEtiK2RMnOfnR/XKlhFMYgDOJiZxsXSVqsYAKZsO4Ixwn4+T/ KUJaz1IhmwhfVW/enYbBm9tciuJfFe7lTqwNUOm9ZwbEjZgCo84Xl9dnVNQuqjwlHXUEbf4B rs7PYwybnt092GiV+O596Ybutn33SvasV2oHe5rFFzV2hgcRM+f6R7ndLeGJy8KpCeFnhY6O T+W3+FFj71PrlO7O1B3oMSj0ejGlPqQivGXevtjADpOofe6Gt1m/d5Wd9n057WXpDW5OsXg4 3eGSEx8Tt2xbn1db+s6s+abhhIhVaasXdvRPuW/EPhl4YwP7+ULr28zDnSnO2/OlM/LUvux0 /ezarwPSa116h+GgM9XfFCO7F/hIcqBR4zd7WN+S+3NxOi7acjvcge3O7lyglZEiTBHCLnVH 5Qr2L7cQEX5DAwAA X-CMS-MailID: 20240826171430epcas5p3d8e34a266ced7b3ea0df2a11b83292ae X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20240826171430epcas5p3d8e34a266ced7b3ea0df2a11b83292ae References: <20240826170606.255718-1-joshi.k@samsung.com> Flexible Data Placement (FDP), as ratified in TP 4146a, allows the host to control the placement of logical blocks so as to reduce the SSD WAF. Userspace can send the data placement information using the write hints. Fetch the placement-identifiers if the device supports FDP. The incoming placement hint is mapped to a placement-identifier, which in turn is set in the DSPEC field of the write command. Signed-off-by: Kanchan Joshi Signed-off-by: Nitesh Shetty Signed-off-by: Hui Qi Acked-by: Keith Busch --- drivers/nvme/host/core.c | 81 ++++++++++++++++++++++++++++++++++++++++ drivers/nvme/host/nvme.h | 4 ++ include/linux/nvme.h | 19 ++++++++++ 3 files changed, 104 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 33fa01c599ad..f93abd7fb163 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -43,6 +43,20 @@ struct nvme_ns_info { bool is_removed; }; +struct nvme_fdp_ruh_status_desc { + u16 pid; + u16 ruhid; + u32 earutr; + u64 ruamw; + u8 rsvd16[16]; +}; + +struct nvme_fdp_ruh_status { + u8 rsvd0[14]; + __le16 nruhsd; + struct nvme_fdp_ruh_status_desc ruhsd[]; +}; + unsigned int admin_timeout = 60; module_param(admin_timeout, uint, 0644); MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); @@ -656,6 +670,7 @@ static void nvme_free_ns_head(struct kref *ref) ida_free(&head->subsys->ns_ida, head->instance); cleanup_srcu_struct(&head->srcu); nvme_put_subsystem(head->subsys); + kfree(head->plids); kfree(head); } @@ -958,6 +973,17 @@ static bool nvme_valid_atomic_write(struct request *req) return true; } +static inline void nvme_assign_placement_id(struct nvme_ns *ns, + struct request *req, + struct nvme_command *cmd) +{ + u8 h = umin(ns->head->nr_plids - 1, + WRITE_PLACEMENT_HINT(req->write_hint)); + + cmd->rw.control |= cpu_to_le16(NVME_RW_DTYPE_DPLCMT); + cmd->rw.dsmgmt |= cpu_to_le32(ns->head->plids[h] << 16); +} + static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd, enum nvme_opcode op) @@ -1077,6 +1103,8 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req) break; case REQ_OP_WRITE: ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_write); + if (!ret && ns->head->nr_plids) + nvme_assign_placement_id(ns, req, cmd); break; case REQ_OP_ZONE_APPEND: ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_zone_append); @@ -2113,6 +2141,52 @@ static int nvme_update_ns_info_generic(struct nvme_ns *ns, return ret; } +static int nvme_fetch_fdp_plids(struct nvme_ns *ns, u32 nsid) +{ + struct nvme_command c = {}; + struct nvme_fdp_ruh_status *ruhs; + struct nvme_fdp_ruh_status_desc *ruhsd; + int size, ret, i; + +refetch_plids: + size = struct_size(ruhs, ruhsd, ns->head->nr_plids); + ruhs = kzalloc(size, GFP_KERNEL); + if (!ruhs) + return -ENOMEM; + + c.imr.opcode = nvme_cmd_io_mgmt_recv; + c.imr.nsid = cpu_to_le32(nsid); + c.imr.mo = 0x1; + c.imr.numd = cpu_to_le32((size >> 2) - 1); + + ret = nvme_submit_sync_cmd(ns->queue, &c, ruhs, size); + if (ret) + goto out; + + if (!ns->head->nr_plids) { + ns->head->nr_plids = le16_to_cpu(ruhs->nruhsd); + ns->head->nr_plids = + min_t(u16, ns->head->nr_plids, NVME_MAX_PLIDS); + + if (!ns->head->nr_plids) + goto out; + + kfree(ruhs); + goto refetch_plids; + } + ns->head->plids = kzalloc(ns->head->nr_plids * sizeof(u16), GFP_KERNEL); + if (!ns->head->plids) + return -ENOMEM; + + for (i = 0; i < ns->head->nr_plids; i++) { + ruhsd = &ruhs->ruhsd[i]; + ns->head->plids[i] = le16_to_cpu(ruhsd->pid); + } +out: + kfree(ruhs); + return ret; +} + static int nvme_update_ns_info_block(struct nvme_ns *ns, struct nvme_ns_info *info) { @@ -2204,6 +2278,13 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns, if (ret && !nvme_first_scan(ns->disk)) goto out; } + if (ns->ctrl->ctratt & NVME_CTRL_ATTR_FDPS) { + ret = nvme_fetch_fdp_plids(ns, info->nsid); + if (ret) + dev_warn(ns->ctrl->device, + "FDP failure status:0x%x\n", ret); + } + ret = 0; out: diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index ae5314d32943..7516823ff8dd 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -450,6 +450,8 @@ struct nvme_ns_ids { u8 csi; }; +#define NVME_MAX_PLIDS (MAX_PLACEMENT_HINT_VAL + 1) + /* * Anchor structure for namespaces. There is one for each namespace in a * NVMe subsystem that any of our controllers can see, and the namespace @@ -471,6 +473,8 @@ struct nvme_ns_head { struct kref ref; bool shared; bool passthru_err_log_enabled; + u16 nr_plids; + u16 *plids; struct nvme_effects_log *effects; u64 nuse; unsigned ns_id; diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 7b2ae2e43544..12d8db13b66e 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -275,6 +275,7 @@ enum nvme_ctrl_attr { NVME_CTRL_ATTR_HID_128_BIT = (1 << 0), NVME_CTRL_ATTR_TBKAS = (1 << 6), NVME_CTRL_ATTR_ELBAS = (1 << 15), + NVME_CTRL_ATTR_FDPS = (1 << 19), }; struct nvme_id_ctrl { @@ -843,6 +844,7 @@ enum nvme_opcode { nvme_cmd_resv_register = 0x0d, nvme_cmd_resv_report = 0x0e, nvme_cmd_resv_acquire = 0x11, + nvme_cmd_io_mgmt_recv = 0x12, nvme_cmd_resv_release = 0x15, nvme_cmd_zone_mgmt_send = 0x79, nvme_cmd_zone_mgmt_recv = 0x7a, @@ -864,6 +866,7 @@ enum nvme_opcode { nvme_opcode_name(nvme_cmd_resv_register), \ nvme_opcode_name(nvme_cmd_resv_report), \ nvme_opcode_name(nvme_cmd_resv_acquire), \ + nvme_opcode_name(nvme_cmd_io_mgmt_recv), \ nvme_opcode_name(nvme_cmd_resv_release), \ nvme_opcode_name(nvme_cmd_zone_mgmt_send), \ nvme_opcode_name(nvme_cmd_zone_mgmt_recv), \ @@ -1015,6 +1018,7 @@ enum { NVME_RW_PRINFO_PRCHK_GUARD = 1 << 12, NVME_RW_PRINFO_PRACT = 1 << 13, NVME_RW_DTYPE_STREAMS = 1 << 4, + NVME_RW_DTYPE_DPLCMT = 2 << 4, NVME_WZ_DEAC = 1 << 9, }; @@ -1102,6 +1106,20 @@ struct nvme_zone_mgmt_recv_cmd { __le32 cdw14[2]; }; +struct nvme_io_mgmt_recv_cmd { + __u8 opcode; + __u8 flags; + __u16 command_id; + __le32 nsid; + __le64 rsvd2[2]; + union nvme_data_ptr dptr; + __u8 mo; + __u8 rsvd11; + __u16 mos; + __le32 numd; + __le32 cdw12[4]; +}; + enum { NVME_ZRA_ZONE_REPORT = 0, NVME_ZRASF_ZONE_REPORT_ALL = 0, @@ -1822,6 +1840,7 @@ struct nvme_command { struct nvmf_auth_receive_command auth_receive; struct nvme_dbbuf dbbuf; struct nvme_directive_cmd directive; + struct nvme_io_mgmt_recv_cmd imr; }; };