sys/dev/nvme/nvme_ns_cmd.c

   1 /*-
   2  * Copyright (C) 2012 Intel Corporation
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include "nvme_private.h"
  31
  32 int
  33 nvme_ns_cmd_read(struct nvme_namespace *ns, void *payload, uint64_t lba,
  34     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
  35 {
  36         struct nvme_request     *req;
  37         struct nvme_command     *cmd;
  38
  39         req = nvme_allocate_request_vaddr(payload,
  40             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
  41
  42         if (req == NULL)
  43                 return (ENOMEM);
  44         cmd = &req->cmd;
  45         cmd->opc = NVME_OPC_READ;
  46         cmd->nsid = ns->id;
  47
  48         /* TODO: create a read command data structure */
  49         *(uint64_t *)&cmd->cdw10 = lba;
  50         cmd->cdw12 = lba_count-1;
  51
  52         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  53
  54         return (0);
  55 }
  56
  57 int
  58 nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
  59     nvme_cb_fn_t cb_fn, void *cb_arg)
  60 {
  61         struct nvme_request     *req;
  62         struct nvme_command     *cmd;
  63         uint64_t                lba;
  64         uint64_t                lba_count;
  65
  66         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
  67
  68         if (req == NULL)
  69                 return (ENOMEM);
  70         cmd = &req->cmd;
  71         cmd->opc = NVME_OPC_READ;
  72         cmd->nsid = ns->id;
  73
  74         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
  75         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
  76
  77         /* TODO: create a read command data structure */
  78         *(uint64_t *)&cmd->cdw10 = lba;
  79         cmd->cdw12 = lba_count-1;
  80
  81         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  82
  83         return (0);
  84 }
  85
  86 int
  87 nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
  88     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
  89 {
  90         struct nvme_request     *req;
  91         struct nvme_command     *cmd;
  92
  93         req = nvme_allocate_request_vaddr(payload,
  94             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
  95
  96         if (req == NULL)
  97                 return (ENOMEM);
  98
  99         cmd = &req->cmd;
 100         cmd->opc = NVME_OPC_WRITE;
 101         cmd->nsid = ns->id;
 102
 103         /* TODO: create a write command data structure */
 104         *(uint64_t *)&cmd->cdw10 = lba;
 105         cmd->cdw12 = lba_count-1;
 106
 107         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 108
 109         return (0);
 110 }
 111
 112 int
 113 nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
 114     nvme_cb_fn_t cb_fn, void *cb_arg)
 115 {
 116         struct nvme_request     *req;
 117         struct nvme_command     *cmd;
 118         uint64_t                lba;
 119         uint64_t                lba_count;
 120
 121         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
 122
 123         if (req == NULL)
 124                 return (ENOMEM);
 125         cmd = &req->cmd;
 126         cmd->opc = NVME_OPC_WRITE;
 127         cmd->nsid = ns->id;
 128
 129         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
 130         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
 131
 132         /* TODO: create a write command data structure */
 133         *(uint64_t *)&cmd->cdw10 = lba;
 134         cmd->cdw12 = lba_count-1;
 135
 136         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 137
 138         return (0);
 139 }
 140
 141 int
 142 nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
 143     uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
 144 {
 145         struct nvme_request     *req;
 146         struct nvme_command     *cmd;
 147
 148         req = nvme_allocate_request_vaddr(payload,
 149             num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg);
 150
 151         if (req == NULL)
 152                 return (ENOMEM);
 153
 154         cmd = &req->cmd;
 155         cmd->opc = NVME_OPC_DATASET_MANAGEMENT;
 156         cmd->nsid = ns->id;
 157
 158         /* TODO: create a delete command data structure */
 159         cmd->cdw10 = num_ranges - 1;
 160         cmd->cdw11 = NVME_DSM_ATTR_DEALLOCATE;
 161
 162         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 163
 164         return (0);
 165 }
 166
 167 int
 168 nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
 169 {
 170         struct nvme_request     *req;
 171         struct nvme_command     *cmd;
 172
 173         req = nvme_allocate_request_null(cb_fn, cb_arg);
 174
 175         if (req == NULL)
 176                 return (ENOMEM);
 177
 178         cmd = &req->cmd;
 179         cmd->opc = NVME_OPC_FLUSH;
 180         cmd->nsid = ns->id;
 181
 182         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 183
 184         return (0);
 185 }