nvme_ns_cmd.c

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    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 
   38         req = nvme_allocate_request_vaddr(payload,
   39             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
   40 
   41         if (req == NULL)
   42                 return (ENOMEM);
   43 
   44         nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
   45 
   46         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   47 
   48         return (0);
   49 }
   50 
   51 int
   52 nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
   53     nvme_cb_fn_t cb_fn, void *cb_arg)
   54 {
   55         struct nvme_request     *req;
   56         uint64_t                lba;
   57         uint64_t                lba_count;
   58 
   59         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
   60 
   61         if (req == NULL)
   62                 return (ENOMEM);
   63 
   64         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
   65         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
   66         nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
   67 
   68         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   69 
   70         return (0);
   71 }
   72 
   73 int
   74 nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
   75     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
   76 {
   77         struct nvme_request     *req;
   78 
   79         req = nvme_allocate_request_vaddr(payload,
   80             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
   81 
   82         if (req == NULL)
   83                 return (ENOMEM);
   84 
   85         nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
   86 
   87         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   88 
   89         return (0);
   90 }
   91 
   92 int
   93 nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
   94     nvme_cb_fn_t cb_fn, void *cb_arg)
   95 {
   96         struct nvme_request     *req;
   97         uint64_t                lba;
   98         uint64_t                lba_count;
   99 
  100         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
  101 
  102         if (req == NULL)
  103                 return (ENOMEM);
  104         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
  105         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
  106         nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
  107 
  108         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  109 
  110         return (0);
  111 }
  112 
  113 int
  114 nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
  115     uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
  116 {
  117         struct nvme_request     *req;
  118         struct nvme_command     *cmd;
  119 
  120         req = nvme_allocate_request_vaddr(payload,
  121             num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg);
  122 
  123         if (req == NULL)
  124                 return (ENOMEM);
  125 
  126         cmd = &req->cmd;
  127         cmd->opc = NVME_OPC_DATASET_MANAGEMENT;
  128         cmd->nsid = ns->id;
  129 
  130         /* TODO: create a delete command data structure */
  131         cmd->cdw10 = num_ranges - 1;
  132         cmd->cdw11 = NVME_DSM_ATTR_DEALLOCATE;
  133 
  134         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  135 
  136         return (0);
  137 }
  138 
  139 int
  140 nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
  141 {
  142         struct nvme_request     *req;
  143 
  144         req = nvme_allocate_request_null(cb_fn, cb_arg);
  145 
  146         if (req == NULL)
  147                 return (ENOMEM);
  148 
  149         nvme_ns_flush_cmd(&req->cmd, ns->id);
  150         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  151 
  152         return (0);
  153 }
  154 
  155 /* Timeout = 1 sec */
  156 #define NVD_DUMP_TIMEOUT        200000
  157 
  158 int
  159 nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
  160 {
  161         struct nvme_completion_poll_status status;
  162         struct nvme_request *req;
  163         struct nvme_command *cmd;
  164         uint64_t lba, lba_count;
  165         int i;
  166 
  167         status.done = FALSE;
  168         req = nvme_allocate_request_vaddr(virt, len, nvme_completion_poll_cb,
  169             &status);
  170         if (req == NULL)
  171                 return (ENOMEM);
  172 
  173         cmd = &req->cmd;
  174 
  175         if (len > 0) {
  176                 lba = offset / nvme_ns_get_sector_size(ns);
  177                 lba_count = len / nvme_ns_get_sector_size(ns);
  178                 nvme_ns_write_cmd(cmd, ns->id, lba, lba_count);
  179         } else
  180                 nvme_ns_flush_cmd(cmd, ns->id);
  181 
  182         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  183         if (req->qpair == NULL)
  184                 return (ENXIO);
  185 
  186         i = 0;
  187         while ((i++ < NVD_DUMP_TIMEOUT) && (status.done == FALSE)) {
  188                 DELAY(5);
  189                 nvme_qpair_process_completions(req->qpair);
  190         }
  191 
  192         if (status.done == FALSE)
  193                 return (ETIMEDOUT);
  194 
  195         return (0);
  196 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/nvme/nvme_ns_cmd.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/nvme/nvme_ns_cmd.c