sys/dev/disk/nvme/nvme_ioctl.c

   1 /*
   2  * Copyright (c) 2016 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   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  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "nvme.h"
  36
  37 int
  38 nvme_getlog_ioctl(nvme_softc_t *sc, nvme_getlog_ioctl_t *ioc)
  39 {
  40         int error;
  41         nvme_request_t *req;
  42
  43         if ((ioc->ret_size & 3) || ioc->ret_size > sizeof(ioc->info))
  44                 return EINVAL;
  45         if (ioc->ret_size < 4)
  46                 return EINVAL;
  47
  48         lockmgr(&sc->ioctl_lk, LK_EXCLUSIVE);
  49         req = nvme_get_admin_request(sc, NVME_OP_GET_LOG_PAGE);
  50         req->cmd.head.nsid = -1;
  51         req->cmd.getlog.lid = ioc->lid;
  52         req->cmd.getlog.numdl = ioc->ret_size / 4 - 1;
  53         /* leave numdh 0 (NVMe 1.2.1 allows > 65535 dwords) */
  54         /* leave lpol and lpou 0 for now */
  55         bzero(req->info, sizeof(*req->info));
  56         nvme_submit_request(req);
  57         ioc->status = nvme_wait_request(req);
  58         bcopy(req->info, &ioc->info, ioc->ret_size);
  59         nvme_put_request(req);
  60         lockmgr(&sc->ioctl_lk, LK_RELEASE);
  61
  62         error = 0;
  63
  64         return error;
  65 }