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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (C) 2012 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "nvme_private.h"
int
nvme_ns_cmd_read(struct nvme_namespace *ns, void *payload, uint64_t lba,
uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
req = nvme_allocate_request_vaddr(payload,
lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
int
nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
uint64_t lba;
uint64_t lba_count;
req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
int
nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
req = nvme_allocate_request_vaddr(payload,
lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
int
nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
uint64_t lba;
uint64_t lba_count;
req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
int
nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_command *cmd;
req = nvme_allocate_request_vaddr(payload,
num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
cmd = &req->cmd;
cmd->opc = NVME_OPC_DATASET_MANAGEMENT;
cmd->nsid = htole32(ns->id);
/* TODO: create a delete command data structure */
cmd->cdw10 = htole32(num_ranges - 1);
cmd->cdw11 = htole32(NVME_DSM_ATTR_DEALLOCATE);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
int
nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
{
struct nvme_request *req;
req = nvme_allocate_request_null(cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
nvme_ns_flush_cmd(&req->cmd, ns->id);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}
/* Timeout = 1 sec */
#define NVD_DUMP_TIMEOUT 200000
int
nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
{
struct nvme_completion_poll_status status;
struct nvme_request *req;
struct nvme_command *cmd;
uint64_t lba, lba_count;
int i;
status.done = FALSE;
req = nvme_allocate_request_vaddr(virt, len, nvme_completion_poll_cb,
&status);
if (req == NULL)
return (ENOMEM);
cmd = &req->cmd;
if (len > 0) {
lba = offset / nvme_ns_get_sector_size(ns);
lba_count = len / nvme_ns_get_sector_size(ns);
nvme_ns_write_cmd(cmd, ns->id, lba, lba_count);
} else
nvme_ns_flush_cmd(cmd, ns->id);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
if (req->qpair == NULL)
return (ENXIO);
i = 0;
while ((i++ < NVD_DUMP_TIMEOUT) && (status.done == FALSE)) {
DELAY(5);
nvme_qpair_process_completions(req->qpair);
}
/*
* Normally, when using the polling interface, we can't return a
* timeout error because we don't know when the completion routines
* will be called if the command later completes. However, in this
* case we're running a system dump, so all interrupts are turned
* off, the scheduler isn't running so there's nothing to complete
* the transaction.
*/
if (status.done == FALSE)
return (ETIMEDOUT);
return (0);
}
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