nvme_ns_cmd.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (C) 2012 Intel Corporation
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include "nvme_private.h"
   33 
   34 int
   35 nvme_ns_cmd_read(struct nvme_namespace *ns, void *payload, uint64_t lba,
   36     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
   37 {
   38         struct nvme_request     *req;
   39 
   40         req = nvme_allocate_request_vaddr(payload,
   41             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
   42 
   43         if (req == NULL)
   44                 return (ENOMEM);
   45 
   46         nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
   47 
   48         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   49 
   50         return (0);
   51 }
   52 
   53 int
   54 nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
   55     nvme_cb_fn_t cb_fn, void *cb_arg)
   56 {
   57         struct nvme_request     *req;
   58         uint64_t                lba;
   59         uint64_t                lba_count;
   60 
   61         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
   62 
   63         if (req == NULL)
   64                 return (ENOMEM);
   65 
   66         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
   67         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
   68         nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
   69 
   70         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   71 
   72         return (0);
   73 }
   74 
   75 int
   76 nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
   77     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
   78 {
   79         struct nvme_request     *req;
   80 
   81         req = nvme_allocate_request_vaddr(payload,
   82             lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
   83 
   84         if (req == NULL)
   85                 return (ENOMEM);
   86 
   87         nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
   88 
   89         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
   90 
   91         return (0);
   92 }
   93 
   94 int
   95 nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
   96     nvme_cb_fn_t cb_fn, void *cb_arg)
   97 {
   98         struct nvme_request     *req;
   99         uint64_t                lba;
  100         uint64_t                lba_count;
  101 
  102         req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
  103 
  104         if (req == NULL)
  105                 return (ENOMEM);
  106         lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
  107         lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
  108         nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
  109 
  110         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  111 
  112         return (0);
  113 }
  114 
  115 int
  116 nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
  117     uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
  118 {
  119         struct nvme_request     *req;
  120         struct nvme_command     *cmd;
  121 
  122         req = nvme_allocate_request_vaddr(payload,
  123             num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg);
  124 
  125         if (req == NULL)
  126                 return (ENOMEM);
  127 
  128         cmd = &req->cmd;
  129         cmd->opc = NVME_OPC_DATASET_MANAGEMENT;
  130         cmd->nsid = htole32(ns->id);
  131 
  132         /* TODO: create a delete command data structure */
  133         cmd->cdw10 = htole32(num_ranges - 1);
  134         cmd->cdw11 = htole32(NVME_DSM_ATTR_DEALLOCATE);
  135 
  136         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  137 
  138         return (0);
  139 }
  140 
  141 int
  142 nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
  143 {
  144         struct nvme_request     *req;
  145 
  146         req = nvme_allocate_request_null(cb_fn, cb_arg);
  147 
  148         if (req == NULL)
  149                 return (ENOMEM);
  150 
  151         nvme_ns_flush_cmd(&req->cmd, ns->id);
  152         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  153 
  154         return (0);
  155 }
  156 
  157 /* Timeout = 1 sec */
  158 #define NVD_DUMP_TIMEOUT        200000
  159 
  160 int
  161 nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
  162 {
  163         struct nvme_completion_poll_status status;
  164         struct nvme_request *req;
  165         struct nvme_command *cmd;
  166         uint64_t lba, lba_count;
  167         int i;
  168 
  169         status.done = FALSE;
  170         req = nvme_allocate_request_vaddr(virt, len, nvme_completion_poll_cb,
  171             &status);
  172         if (req == NULL)
  173                 return (ENOMEM);
  174 
  175         cmd = &req->cmd;
  176 
  177         if (len > 0) {
  178                 lba = offset / nvme_ns_get_sector_size(ns);
  179                 lba_count = len / nvme_ns_get_sector_size(ns);
  180                 nvme_ns_write_cmd(cmd, ns->id, lba, lba_count);
  181         } else
  182                 nvme_ns_flush_cmd(cmd, ns->id);
  183 
  184         nvme_ctrlr_submit_io_request(ns->ctrlr, req);
  185         if (req->qpair == NULL)
  186                 return (ENXIO);
  187 
  188         i = 0;
  189         while ((i++ < NVD_DUMP_TIMEOUT) && (status.done == FALSE)) {
  190                 DELAY(5);
  191                 nvme_qpair_process_completions(req->qpair);
  192         }
  193 
  194         /*
  195          * Normally, when using the polling interface, we can't return a
  196          * timeout error because we don't know when the completion routines
  197          * will be called if the command later completes. However, in this
  198          * case we're running a system dump, so all interrupts are turned
  199          * off, the scheduler isn't running so there's nothing to complete
  200          * the transaction.
  201          */
  202         if (status.done == FALSE)
  203                 return (ETIMEDOUT);
  204 
  205         return (0);
  206 }

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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