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, lba_count*512, cb_fn, cb_arg);
  40
  41         if (req == NULL)
  42                 return (ENOMEM);
  43         cmd = &req->cmd;
  44         cmd->opc = NVME_OPC_READ;
  45         cmd->nsid = ns->id;
  46
  47         /* TODO: create a read command data structure */
  48         *(uint64_t *)&cmd->cdw10 = lba;
  49         cmd->cdw12 = lba_count-1;
  50
  51         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  52
  53         return (0);
  54 }
  55
  56 int
  57 nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
  58     nvme_cb_fn_t cb_fn, void *cb_arg)
  59 {
  60         struct nvme_request     *req;
  61         struct nvme_command     *cmd;
  62         uint64_t                lba;
  63         uint64_t                lba_count;
  64
  65         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
  66
  67         if (req == NULL)
  68                 return (ENOMEM);
  69         cmd = &req->cmd;
  70         cmd->opc = NVME_OPC_READ;
  71         cmd->nsid = ns->id;
  72
  73         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
  74         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
  75
  76         /* TODO: create a read command data structure */
  77         *(uint64_t *)&cmd->cdw10 = lba;
  78         cmd->cdw12 = lba_count-1;
  79
  80         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  81
  82         return (0);
  83 }
  84
  85 int
  86 nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
  87     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
  88 {
  89         struct nvme_request     *req;
  90         struct nvme_command     *cmd;
  91
  92         req = nvme_allocate_request_vaddr(payload, lba_count*512, cb_fn,
  93             cb_arg);
  94
  95         if (req == NULL)
  96                 return (ENOMEM);
  97
  98         cmd = &req->cmd;
  99         cmd->opc = NVME_OPC_WRITE;
 100         cmd->nsid = ns->id;
 101
 102         /* TODO: create a write command data structure */
 103         *(uint64_t *)&cmd->cdw10 = lba;
 104         cmd->cdw12 = lba_count-1;
 105
 106         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 107
 108         return (0);
 109 }
 110
 111 int
 112 nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
 113     nvme_cb_fn_t cb_fn, void *cb_arg)
 114 {
 115         struct nvme_request     *req;
 116         struct nvme_command     *cmd;
 117         uint64_t                lba;
 118         uint64_t                lba_count;
 119
 120         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
 121
 122         if (req == NULL)
 123                 return (ENOMEM);
 124         cmd = &req->cmd;
 125         cmd->opc = NVME_OPC_WRITE;
 126         cmd->nsid = ns->id;
 127
 128         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
 129         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
 130
 131         /* TODO: create a write command data structure */
 132         *(uint64_t *)&cmd->cdw10 = lba;
 133         cmd->cdw12 = lba_count-1;
 134
 135         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 136
 137         return (0);
 138 }
 139
 140 int
 141 nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
 142     uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
 143 {
 144         struct nvme_request     *req;
 145         struct nvme_command     *cmd;
 146
 147         req = nvme_allocate_request_vaddr(payload,
 148             num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg);
 149
 150         if (req == NULL)
 151                 return (ENOMEM);
 152
 153         cmd = &req->cmd;
 154         cmd->opc = NVME_OPC_DATASET_MANAGEMENT;
 155         cmd->nsid = ns->id;
 156
 157         /* TODO: create a delete command data structure */
 158         cmd->cdw10 = num_ranges - 1;
 159         cmd->cdw11 = NVME_DSM_ATTR_DEALLOCATE;
 160
 161         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 162
 163         return (0);
 164 }
 165
 166 int
 167 nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
 168 {
 169         struct nvme_request     *req;
 170         struct nvme_command     *cmd;
 171
 172         req = nvme_allocate_request_null(cb_fn, cb_arg);
 173
 174         if (req == NULL)
 175                 return (ENOMEM);
 176
 177         cmd = &req->cmd;
 178         cmd->opc = NVME_OPC_FLUSH;
 179         cmd->nsid = ns->id;
 180
 181         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
 182
 183         return (0);
 184 }