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nvme_ns.c
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nvme_ns.c
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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation. All rights reserved.
* Copyright (c) 2017, Western Digital Corporation or its affiliates.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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 "nvme_internal.h"
static inline struct nvme_ns_data *nvme_ns_get_data(struct nvme_ns *ns)
{
return &ns->ctrlr->nsdata[ns->id - 1];
}
static int nvme_ns_identify_update(struct nvme_ns *ns)
{
struct nvme_ctrlr *ctrlr = ns->ctrlr;
struct nvme_ns_data *nsdata = nvme_ns_get_data(ns);
uint32_t sector_size;
int ret;
ret = nvme_admin_identify_ns(ctrlr, ns->id, nsdata);
if (ret != 0) {
nvme_err("nvme_identify_namespace failed\n");
return ret;
}
sector_size = 1 << nsdata->lbaf[nsdata->flbas.format].lbads;
ns->sector_size = sector_size;
ns->sectors_per_max_io = ctrlr->max_xfer_size / sector_size;
ns->sectors_per_stripe = ns->stripe_size / sector_size;
ns->flags = 0x0000;
if (ctrlr->cdata.oncs.dsm)
ns->flags |= NVME_NS_DEALLOCATE_SUPPORTED;
if (ctrlr->cdata.vwc.present)
ns->flags |= NVME_NS_FLUSH_SUPPORTED;
if (ctrlr->cdata.oncs.write_zeroes)
ns->flags |= NVME_NS_WRITE_ZEROES_SUPPORTED;
if (nsdata->nsrescap.raw)
ns->flags |= NVME_NS_RESERVATION_SUPPORTED;
ns->md_size = nsdata->lbaf[nsdata->flbas.format].ms;
ns->pi_type = NVME_FMT_NVM_PROTECTION_DISABLE;
if (nsdata->lbaf[nsdata->flbas.format].ms && nsdata->dps.pit) {
ns->flags |= NVME_NS_DPS_PI_SUPPORTED;
ns->pi_type = nsdata->dps.pit;
if (nsdata->flbas.extended)
ns->flags |= NVME_NS_EXTENDED_LBA_SUPPORTED;
}
return 0;
}
/*
* Initialize a namespace.
*/
int nvme_ns_construct(struct nvme_ctrlr *ctrlr, struct nvme_ns *ns,
unsigned int id)
{
uint32_t pci_devid;
ns->ctrlr = ctrlr;
ns->id = id;
ns->stripe_size = 0;
nvme_pcicfg_read32(ctrlr->pci_dev, &pci_devid, 0);
if (pci_devid == INTEL_DC_P3X00_DEVID && ctrlr->cdata.vs[3] != 0)
ns->stripe_size = (1 << ctrlr->cdata.vs[3])
* ctrlr->min_page_size;
return nvme_ns_identify_update(ns);
}
/*
* Open a namespace.
*/
struct nvme_ns *nvme_ns_open(struct nvme_ctrlr *ctrlr, unsigned int ns_id)
{
struct nvme_ns *ns = NULL;
pthread_mutex_lock(&ctrlr->lock);
if (ns_id >= 1 && ns_id <= ctrlr->nr_ns) {
ns = &ctrlr->ns[ns_id - 1];
ns->open_count++;
}
pthread_mutex_unlock(&ctrlr->lock);
return ns;
}
/*
* Get the controller of an open name space and lock it,
* making sure in the process that the ns handle is valid.
*/
static struct nvme_ctrlr *nvme_ns_ctrlr_lock(struct nvme_ns *ns)
{
struct nvme_ctrlr *ctrlr;
if (!ns)
return NULL;
ctrlr = ns->ctrlr;
if (ns->id < 1 ||
ns->id > ctrlr->nr_ns ||
ns != &ctrlr->ns[ns->id - 1])
return NULL;
pthread_mutex_lock(&ctrlr->lock);
/*
* Between the check and lock, the ns may have gone away.
* So check again, and make sure that the name space is open.
*/
if (ns->id > ctrlr->nr_ns ||
ns != &ctrlr->ns[ns->id - 1] ||
ns->open_count == 0) {
pthread_mutex_unlock(&ctrlr->lock);
return NULL;
}
return ctrlr;
}
/*
* Close an open namespace.
*/
int nvme_ns_close(struct nvme_ns *ns)
{
struct nvme_ctrlr *ctrlr;
ctrlr = nvme_ns_ctrlr_lock(ns);
if (!ctrlr) {
nvme_err("Invalid name space handle\n");
return -EINVAL;
}
ns->open_count--;
pthread_mutex_unlock(&ctrlr->lock);
return 0;
}
/*
* Get namespace information
*/
int nvme_ns_stat(struct nvme_ns *ns, struct nvme_ns_stat *ns_stat)
{
struct nvme_ctrlr *ctrlr;
ctrlr = nvme_ns_ctrlr_lock(ns);
if (!ctrlr) {
nvme_err("Invalid name space handle\n");
return -EINVAL;
}
ns_stat->id = ns->id;
ns_stat->sector_size = ns->sector_size;
ns_stat->sectors = nvme_ns_get_data(ns)->nsze;
ns_stat->flags = ns->flags;
ns_stat->pi_type = ns->pi_type;
ns_stat->md_size = ns->md_size;
pthread_mutex_unlock(&ctrlr->lock);
return 0;
}
/*
* Get namespace data
*/
int nvme_ns_data(struct nvme_ns *ns, struct nvme_ns_data *nsdata)
{
struct nvme_ctrlr *ctrlr;
ctrlr = nvme_ns_ctrlr_lock(ns);
if (!ctrlr) {
nvme_err("Invalid name space handle\n");
return -EINVAL;
}
memcpy(nsdata, nvme_ns_get_data(ns), sizeof(struct nvme_ns_data));
pthread_mutex_unlock(&ctrlr->lock);
return 0;
}
static struct nvme_request *_nvme_ns_rw(struct nvme_ns *ns,
struct nvme_qpair *qpair,
const struct nvme_payload *payload, uint64_t lba,
uint32_t lba_count, nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t opc, uint32_t io_flags,
uint16_t apptag_mask, uint16_t apptag);
static struct nvme_request *
_nvme_ns_split_request(struct nvme_ns *ns,
struct nvme_qpair *qpair,
const struct nvme_payload *payload,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
uint32_t opc,
uint32_t io_flags,
struct nvme_request *req,
uint32_t sectors_per_max_io,
uint32_t sector_mask,
uint16_t apptag_mask,
uint16_t apptag)
{
uint32_t sector_size = ns->sector_size;
uint32_t md_size = ns->md_size;
uint32_t remaining_lba_count = lba_count;
uint32_t offset = 0;
uint32_t md_offset = 0;
struct nvme_request *child, *tmp;
if (ns->flags & NVME_NS_DPS_PI_SUPPORTED) {
/* for extended LBA only */
if ((ns->flags & NVME_NS_EXTENDED_LBA_SUPPORTED)
&& !(io_flags & NVME_IO_FLAGS_PRACT))
sector_size += ns->md_size;
}
while (remaining_lba_count > 0) {
lba_count = sectors_per_max_io - (lba & sector_mask);
lba_count = nvme_min(remaining_lba_count, lba_count);
child = _nvme_ns_rw(ns, qpair, payload, lba, lba_count, cb_fn,
cb_arg, opc, io_flags, apptag_mask, apptag);
if (child == NULL) {
if (req->child_reqs) {
/* free all child nvme_request */
TAILQ_FOREACH_SAFE(child, &req->children,
child_tailq, tmp) {
nvme_request_remove_child(req, child);
nvme_request_free(child);
}
}
return NULL;
}
child->payload_offset = offset;
/* for separate metadata buffer only */
if (payload->md)
child->md_offset = md_offset;
nvme_request_add_child(req, child);
remaining_lba_count -= lba_count;
lba += lba_count;
offset += lba_count * sector_size;
md_offset += lba_count * md_size;
}
return req;
}
static struct nvme_request *_nvme_ns_rw(struct nvme_ns *ns,
struct nvme_qpair *qpair,
const struct nvme_payload *payload,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
uint32_t opc,
uint32_t io_flags,
uint16_t apptag_mask,
uint16_t apptag)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
uint64_t *tmp_lba;
uint32_t sector_size;
uint32_t sectors_per_max_io;
uint32_t sectors_per_stripe;
/* The bottom 16 bits must be empty */
if (io_flags & 0xFFFF)
return NULL;
sector_size = ns->sector_size;
sectors_per_max_io = ns->sectors_per_max_io;
sectors_per_stripe = ns->sectors_per_stripe;
if (ns->flags & NVME_NS_DPS_PI_SUPPORTED)
/* for extended LBA only */
if ((ns->flags & NVME_NS_EXTENDED_LBA_SUPPORTED) &&
!(io_flags & NVME_IO_FLAGS_PRACT))
sector_size += ns->md_size;
req = nvme_request_allocate(qpair, payload,
lba_count * sector_size, cb_fn, cb_arg);
if (req == NULL)
return NULL;
/*
* Intel DC P3*00 NVMe controllers benefit from driver-assisted striping.
* If this controller defines a stripe boundary and this I/O spans
* a stripe boundary, split the request into multiple requests and
* submit each separately to hardware.
*/
if (sectors_per_stripe > 0 &&
(((lba & (sectors_per_stripe - 1)) + lba_count) > sectors_per_stripe))
return _nvme_ns_split_request(ns, qpair, payload, lba,
lba_count, cb_fn, cb_arg, opc,
io_flags, req, sectors_per_stripe,
sectors_per_stripe - 1,
apptag_mask, apptag);
if (lba_count > sectors_per_max_io)
return _nvme_ns_split_request(ns, qpair, payload, lba,
lba_count, cb_fn, cb_arg, opc,
io_flags, req, sectors_per_max_io,
0, apptag_mask, apptag);
cmd = &req->cmd;
cmd->opc = opc;
cmd->nsid = ns->id;
tmp_lba = (uint64_t *)&cmd->cdw10;
*tmp_lba = lba;
if (ns->flags & NVME_NS_DPS_PI_SUPPORTED) {
switch (ns->pi_type) {
case NVME_FMT_NVM_PROTECTION_TYPE1:
case NVME_FMT_NVM_PROTECTION_TYPE2:
cmd->cdw14 = (uint32_t)lba;
break;
}
}
cmd->cdw12 = lba_count - 1;
cmd->cdw12 |= io_flags;
cmd->cdw15 = apptag_mask;
cmd->cdw15 = (cmd->cdw15 << 16 | apptag);
return req;
}
int nvme_ns_read(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *buffer,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags)
{
struct nvme_request *req;
struct nvme_payload payload;
payload.type = NVME_PAYLOAD_TYPE_CONTIG;
payload.u.contig = buffer;
payload.md = NULL;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_READ, io_flags, 0, 0);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_read_with_md(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *buffer, void *metadata,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags,
uint16_t apptag_mask, uint16_t apptag)
{
struct nvme_request *req;
struct nvme_payload payload;
payload.type = NVME_PAYLOAD_TYPE_CONTIG;
payload.u.contig = buffer;
payload.md = metadata;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_READ, io_flags, apptag_mask, apptag);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_readv(struct nvme_ns *ns, struct nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags,
nvme_req_reset_sgl_cb reset_sgl_fn,
nvme_req_next_sge_cb next_sge_fn)
{
struct nvme_request *req;
struct nvme_payload payload;
if (reset_sgl_fn == NULL || next_sge_fn == NULL)
return -EINVAL;
payload.type = NVME_PAYLOAD_TYPE_SGL;
payload.md = NULL;
payload.u.sgl.reset_sgl_fn = reset_sgl_fn;
payload.u.sgl.next_sge_fn = next_sge_fn;
payload.u.sgl.cb_arg = cb_arg;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_READ, io_flags, 0, 0);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_write(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *buffer,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags)
{
struct nvme_request *req;
struct nvme_payload payload;
payload.type = NVME_PAYLOAD_TYPE_CONTIG;
payload.u.contig = buffer;
payload.md = NULL;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_WRITE, io_flags, 0, 0);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_write_with_md(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *buffer, void *metadata,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags,
uint16_t apptag_mask, uint16_t apptag)
{
struct nvme_request *req;
struct nvme_payload payload;
payload.type = NVME_PAYLOAD_TYPE_CONTIG;
payload.u.contig = buffer;
payload.md = metadata;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_WRITE, io_flags, apptag_mask, apptag);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_writev(struct nvme_ns *ns, struct nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags,
nvme_req_reset_sgl_cb reset_sgl_fn,
nvme_req_next_sge_cb next_sge_fn)
{
struct nvme_request *req;
struct nvme_payload payload;
if (reset_sgl_fn == NULL || next_sge_fn == NULL)
return -EINVAL;
payload.type = NVME_PAYLOAD_TYPE_SGL;
payload.md = NULL;
payload.u.sgl.reset_sgl_fn = reset_sgl_fn;
payload.u.sgl.next_sge_fn = next_sge_fn;
payload.u.sgl.cb_arg = cb_arg;
req = _nvme_ns_rw(ns, qpair, &payload, lba, lba_count, cb_fn, cb_arg,
NVME_OPC_WRITE, io_flags, 0, 0);
if (req != NULL)
return nvme_qpair_submit_request(qpair, req);
return -ENOMEM;
}
int nvme_ns_write_zeroes(struct nvme_ns *ns, struct nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
nvme_cmd_cb cb_fn, void *cb_arg,
unsigned int io_flags)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
uint64_t *tmp_lba;
if (lba_count == 0)
return -EINVAL;
req = nvme_request_allocate_null(qpair, cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_WRITE_ZEROES;
cmd->nsid = ns->id;
tmp_lba = (uint64_t *)&cmd->cdw10;
*tmp_lba = lba;
cmd->cdw12 = lba_count - 1;
cmd->cdw12 |= io_flags;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_deallocate(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *payload, uint16_t ranges,
nvme_cmd_cb cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
if (ranges == 0 || ranges > NVME_DATASET_MANAGEMENT_MAX_RANGES)
return -EINVAL;
req = nvme_request_allocate_contig(qpair, payload,
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 = ranges - 1;
cmd->cdw11 = NVME_DSM_ATTR_DEALLOCATE;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_flush(struct nvme_ns *ns, struct nvme_qpair *qpair,
nvme_cmd_cb cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
req = nvme_request_allocate_null(qpair, cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_FLUSH;
cmd->nsid = ns->id;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_reservation_register(struct nvme_ns *ns, struct nvme_qpair *qpair,
struct nvme_reservation_register_data *payload,
bool ignore_key,
enum nvme_reservation_register_action action,
enum nvme_reservation_register_cptpl cptpl,
nvme_cmd_cb cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
req = nvme_request_allocate_contig(qpair, payload,
sizeof(struct nvme_reservation_register_data),
cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_RESERVATION_REGISTER;
cmd->nsid = ns->id;
/* Bits 0-2 */
cmd->cdw10 = action;
/* Bit 3 */
cmd->cdw10 |= ignore_key ? 1 << 3 : 0;
/* Bits 30-31 */
cmd->cdw10 |= (uint32_t)cptpl << 30;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_reservation_release(struct nvme_ns *ns, struct nvme_qpair *qpair,
struct nvme_reservation_key_data *payload,
bool ignore_key,
enum nvme_reservation_release_action action,
enum nvme_reservation_type type,
nvme_cmd_cb cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
req = nvme_request_allocate_contig(qpair, payload,
sizeof(struct nvme_reservation_key_data),
cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_RESERVATION_RELEASE;
cmd->nsid = ns->id;
/* Bits 0-2 */
cmd->cdw10 = action;
/* Bit 3 */
cmd->cdw10 |= ignore_key ? 1 << 3 : 0;
/* Bits 8-15 */
cmd->cdw10 |= (uint32_t)type << 8;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_reservation_acquire(struct nvme_ns *ns, struct nvme_qpair *qpair,
struct nvme_reservation_acquire_data *payload,
bool ignore_key,
enum nvme_reservation_acquire_action action,
enum nvme_reservation_type type,
nvme_cmd_cb cb_fn, void *cb_arg)
{
struct nvme_request *req;
struct nvme_cmd *cmd;
req = nvme_request_allocate_contig(qpair, payload,
sizeof(struct nvme_reservation_acquire_data),
cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_RESERVATION_ACQUIRE;
cmd->nsid = ns->id;
/* Bits 0-2 */
cmd->cdw10 = action;
/* Bit 3 */
cmd->cdw10 |= ignore_key ? 1 << 3 : 0;
/* Bits 8-15 */
cmd->cdw10 |= (uint32_t)type << 8;
return nvme_qpair_submit_request(qpair, req);
}
int nvme_ns_reservation_report(struct nvme_ns *ns, struct nvme_qpair *qpair,
void *payload, size_t len,
nvme_cmd_cb cb_fn, void *cb_arg)
{
uint32_t num_dwords;
struct nvme_request *req;
struct nvme_cmd *cmd;
if (len % 4)
return -EINVAL;
num_dwords = len / 4;
req = nvme_request_allocate_contig(qpair, payload, len, cb_fn, cb_arg);
if (req == NULL)
return -ENOMEM;
cmd = &req->cmd;
cmd->opc = NVME_OPC_RESERVATION_REPORT;
cmd->nsid = ns->id;
cmd->cdw10 = num_dwords;
return nvme_qpair_submit_request(qpair, req);
}