668847e150
nvme_ctrlr_process_io_completions() now takes a second parameter, max_completions, to let the user limit the number of I/Os completed on each poll. If there are many I/Os waiting to be completed, the nvme_ctrlr_process_io_completions() function could run for a long time before returning control to the user, so the max_completions parameter lets the user have more control of latency. Change-Id: I3173059d94ec1cc5dbb636fc0ffd3dc09f3bfe4b Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/*-
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
|
|
* All rights reserved.
|
|
*
|
|
* 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_namespace_data *
|
|
_nvme_ns_get_data(struct nvme_namespace *ns)
|
|
{
|
|
return &ns->ctrlr->nsdata[ns->id - 1];
|
|
}
|
|
|
|
uint32_t
|
|
nvme_ns_get_id(struct nvme_namespace *ns)
|
|
{
|
|
return ns->id;
|
|
}
|
|
|
|
uint32_t
|
|
nvme_ns_get_max_io_xfer_size(struct nvme_namespace *ns)
|
|
{
|
|
return ns->ctrlr->max_xfer_size;
|
|
}
|
|
|
|
uint32_t
|
|
nvme_ns_get_sector_size(struct nvme_namespace *ns)
|
|
{
|
|
return ns->sector_size;
|
|
}
|
|
|
|
uint64_t
|
|
nvme_ns_get_num_sectors(struct nvme_namespace *ns)
|
|
{
|
|
return _nvme_ns_get_data(ns)->nsze;
|
|
}
|
|
|
|
uint64_t
|
|
nvme_ns_get_size(struct nvme_namespace *ns)
|
|
{
|
|
return nvme_ns_get_num_sectors(ns) * nvme_ns_get_sector_size(ns);
|
|
}
|
|
|
|
uint32_t
|
|
nvme_ns_get_flags(struct nvme_namespace *ns)
|
|
{
|
|
return ns->flags;
|
|
}
|
|
|
|
const struct nvme_namespace_data *
|
|
nvme_ns_get_data(struct nvme_namespace *ns)
|
|
{
|
|
return _nvme_ns_get_data(ns);
|
|
}
|
|
|
|
int
|
|
nvme_ns_construct(struct nvme_namespace *ns, uint16_t id,
|
|
struct nvme_controller *ctrlr)
|
|
{
|
|
struct nvme_completion_poll_status status;
|
|
struct nvme_namespace_data *nsdata;
|
|
uint32_t pci_devid;
|
|
|
|
nvme_assert(id > 0, ("invalid namespace id %d", id));
|
|
|
|
ns->ctrlr = ctrlr;
|
|
ns->id = id;
|
|
ns->stripe_size = 0;
|
|
|
|
nvme_pcicfg_read32(ctrlr->devhandle, &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;
|
|
}
|
|
|
|
nsdata = _nvme_ns_get_data(ns);
|
|
|
|
status.done = false;
|
|
nvme_ctrlr_cmd_identify_namespace(ctrlr, id, nsdata,
|
|
nvme_completion_poll_cb, &status);
|
|
while (status.done == false) {
|
|
nvme_qpair_process_completions(&ctrlr->adminq, 0);
|
|
}
|
|
if (nvme_completion_is_error(&status.cpl)) {
|
|
nvme_printf(ctrlr, "nvme_identify_namespace failed\n");
|
|
return ENXIO;
|
|
}
|
|
|
|
ns->sector_size = 1 << nsdata->lbaf[nsdata->flbas.format].lbads;
|
|
|
|
ns->sectors_per_max_io = nvme_ns_get_max_io_xfer_size(ns) / ns->sector_size;
|
|
ns->sectors_per_stripe = ns->stripe_size / ns->sector_size;
|
|
|
|
if (ctrlr->cdata.oncs.dsm) {
|
|
ns->flags |= NVME_NS_DEALLOCATE_SUPPORTED;
|
|
}
|
|
|
|
if (ctrlr->cdata.vwc.present) {
|
|
ns->flags |= NVME_NS_FLUSH_SUPPORTED;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nvme_ns_destruct(struct nvme_namespace *ns)
|
|
{
|
|
|
|
}
|