freebsd-skq/sys/dev/nvme/nvme_ns_cmd.c
Jim Harris aaf6b84a4e Make the DSM range count 0-based. Previously we were deallocating one more
LBA than we should have been.

Sponsored by:	Intel
2013-03-26 18:16:30 +00:00

126 lines
3.4 KiB
C

/*-
* 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;
struct nvme_command *cmd;
req = nvme_allocate_request(payload, lba_count*512, cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
cmd = &req->cmd;
cmd->opc = NVME_OPC_READ;
cmd->nsid = ns->id;
/* TODO: create a read command data structure */
*(uint64_t *)&cmd->cdw10 = lba;
cmd->cdw12 = lba_count-1;
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;
struct nvme_command *cmd;
req = nvme_allocate_request(payload, lba_count*512, cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
cmd = &req->cmd;
cmd->opc = NVME_OPC_WRITE;
cmd->nsid = ns->id;
/* TODO: create a write command data structure */
*(uint64_t *)&cmd->cdw10 = lba;
cmd->cdw12 = lba_count-1;
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(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 = ns->id;
/* TODO: create a delete command data structure */
cmd->cdw10 = num_ranges - 1;
cmd->cdw11 = 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;
struct nvme_command *cmd;
req = nvme_allocate_request(NULL, 0, cb_fn, cb_arg);
if (req == NULL)
return (ENOMEM);
cmd = &req->cmd;
cmd->opc = NVME_OPC_FLUSH;
cmd->nsid = ns->id;
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
return (0);
}