#include <machine/rtems-bsd-kernel-space.h>
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2012-2014 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 <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/module.h>
#include <vm/uma.h>
#include "nvme_private.h"
struct nvme_consumer {
uint32_t id;
nvme_cons_ns_fn_t ns_fn;
nvme_cons_ctrlr_fn_t ctrlr_fn;
nvme_cons_async_fn_t async_fn;
nvme_cons_fail_fn_t fail_fn;
};
struct nvme_consumer nvme_consumer[NVME_MAX_CONSUMERS];
#define INVALID_CONSUMER_ID 0xFFFF
uma_zone_t nvme_request_zone;
int32_t nvme_retry_count;
MALLOC_DEFINE(M_NVME, "nvme", "nvme(4) memory allocations");
devclass_t nvme_devclass;
static void
nvme_init(void)
{
uint32_t i;
nvme_request_zone = uma_zcreate("nvme_request",
sizeof(struct nvme_request), NULL, NULL, NULL, NULL, 0, 0);
for (i = 0; i < NVME_MAX_CONSUMERS; i++)
nvme_consumer[i].id = INVALID_CONSUMER_ID;
}
SYSINIT(nvme_register, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_init, NULL);
#ifndef __rtems__
static void
nvme_uninit(void)
{
uma_zdestroy(nvme_request_zone);
}
SYSUNINIT(nvme_unregister, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_uninit, NULL);
#endif /* __rtems__ */
int
nvme_shutdown(device_t dev)
{
struct nvme_controller *ctrlr;
ctrlr = DEVICE2SOFTC(dev);
nvme_ctrlr_shutdown(ctrlr);
return (0);
}
void
nvme_dump_command(struct nvme_command *cmd)
{
printf(
"opc:%x f:%x cid:%x nsid:%x r2:%x r3:%x mptr:%jx prp1:%jx prp2:%jx cdw:%x %x %x %x %x %x\n",
cmd->opc, cmd->fuse, cmd->cid, le32toh(cmd->nsid),
cmd->rsvd2, cmd->rsvd3,
(uintmax_t)le64toh(cmd->mptr), (uintmax_t)le64toh(cmd->prp1), (uintmax_t)le64toh(cmd->prp2),
le32toh(cmd->cdw10), le32toh(cmd->cdw11), le32toh(cmd->cdw12),
le32toh(cmd->cdw13), le32toh(cmd->cdw14), le32toh(cmd->cdw15));
}
void
nvme_dump_completion(struct nvme_completion *cpl)
{
uint8_t p, sc, sct, m, dnr;
uint16_t status;
status = le16toh(cpl->status);
p = NVME_STATUS_GET_P(status);
sc = NVME_STATUS_GET_SC(status);
sct = NVME_STATUS_GET_SCT(status);
m = NVME_STATUS_GET_M(status);
dnr = NVME_STATUS_GET_DNR(status);
printf("cdw0:%08x sqhd:%04x sqid:%04x "
"cid:%04x p:%x sc:%02x sct:%x m:%x dnr:%x\n",
le32toh(cpl->cdw0), le16toh(cpl->sqhd), le16toh(cpl->sqid),
cpl->cid, p, sc, sct, m, dnr);
}
int
nvme_attach(device_t dev)
{
struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
int status;
status = nvme_ctrlr_construct(ctrlr, dev);
if (status != 0) {
nvme_ctrlr_destruct(ctrlr, dev);
return (status);
}
/*
* Reset controller twice to ensure we do a transition from cc.en==1 to
* cc.en==0. This is because we don't really know what status the
* controller was left in when boot handed off to OS. Linux doesn't do
* this, however. If we adopt that policy, see also nvme_ctrlr_resume().
*/
status = nvme_ctrlr_hw_reset(ctrlr);
if (status != 0) {
nvme_ctrlr_destruct(ctrlr, dev);
return (status);
}
status = nvme_ctrlr_hw_reset(ctrlr);
if (status != 0) {
nvme_ctrlr_destruct(ctrlr, dev);
return (status);
}
ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook;
ctrlr->config_hook.ich_arg = ctrlr;
config_intrhook_establish(&ctrlr->config_hook);
return (0);
}
int
nvme_detach (device_t dev)
{
struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
nvme_ctrlr_destruct(ctrlr, dev);
return (0);
}
static void
nvme_notify(struct nvme_consumer *cons,
struct nvme_controller *ctrlr)
{
struct nvme_namespace *ns;
void *ctrlr_cookie;
int cmpset, ns_idx;
/*
* The consumer may register itself after the nvme devices
* have registered with the kernel, but before the
* driver has completed initialization. In that case,
* return here, and when initialization completes, the
* controller will make sure the consumer gets notified.
*/
if (!ctrlr->is_initialized)
return;
cmpset = atomic_cmpset_32(&ctrlr->notification_sent, 0, 1);
if (cmpset == 0)
return;
if (cons->ctrlr_fn != NULL)
ctrlr_cookie = (*cons->ctrlr_fn)(ctrlr);
else
ctrlr_cookie = (void *)(uintptr_t)0xdeadc0dedeadc0de;
ctrlr->cons_cookie[cons->id] = ctrlr_cookie;
/* ctrlr_fn has failed. Nothing to notify here any more. */
if (ctrlr_cookie == NULL)
return;
if (ctrlr->is_failed) {
ctrlr->cons_cookie[cons->id] = NULL;
if (cons->fail_fn != NULL)
(*cons->fail_fn)(ctrlr_cookie);
/*
* Do not notify consumers about the namespaces of a
* failed controller.
*/
return;
}
for (ns_idx = 0; ns_idx < min(ctrlr->cdata.nn, NVME_MAX_NAMESPACES); ns_idx++) {
ns = &ctrlr->ns[ns_idx];
if (ns->data.nsze == 0)
continue;
if (cons->ns_fn != NULL)
ns->cons_cookie[cons->id] =
(*cons->ns_fn)(ns, ctrlr_cookie);
}
}
void
nvme_notify_new_controller(struct nvme_controller *ctrlr)
{
int i;
for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
if (nvme_consumer[i].id != INVALID_CONSUMER_ID) {
nvme_notify(&nvme_consumer[i], ctrlr);
}
}
}
static void
nvme_notify_new_consumer(struct nvme_consumer *cons)
{
device_t *devlist;
struct nvme_controller *ctrlr;
int dev_idx, devcount;
if (devclass_get_devices(nvme_devclass, &devlist, &devcount))
return;
for (dev_idx = 0; dev_idx < devcount; dev_idx++) {
ctrlr = DEVICE2SOFTC(devlist[dev_idx]);
nvme_notify(cons, ctrlr);
}
free(devlist, M_TEMP);
}
void
nvme_notify_async_consumers(struct nvme_controller *ctrlr,
const struct nvme_completion *async_cpl,
uint32_t log_page_id, void *log_page_buffer,
uint32_t log_page_size)
{
struct nvme_consumer *cons;
void *ctrlr_cookie;
uint32_t i;
for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
cons = &nvme_consumer[i];
if (cons->id != INVALID_CONSUMER_ID && cons->async_fn != NULL &&
(ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL) {
(*cons->async_fn)(ctrlr_cookie, async_cpl,
log_page_id, log_page_buffer, log_page_size);
}
}
}
void
nvme_notify_fail_consumers(struct nvme_controller *ctrlr)
{
struct nvme_consumer *cons;
void *ctrlr_cookie;
uint32_t i;
/*
* This controller failed during initialization (i.e. IDENTIFY
* command failed or timed out). Do not notify any nvme
* consumers of the failure here, since the consumer does not
* even know about the controller yet.
*/
if (!ctrlr->is_initialized)
return;
for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
cons = &nvme_consumer[i];
if (cons->id != INVALID_CONSUMER_ID &&
(ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL) {
ctrlr->cons_cookie[i] = NULL;
if (cons->fail_fn != NULL)
cons->fail_fn(ctrlr_cookie);
}
}
}
void
nvme_notify_ns(struct nvme_controller *ctrlr, int nsid)
{
struct nvme_consumer *cons;
struct nvme_namespace *ns = &ctrlr->ns[nsid - 1];
void *ctrlr_cookie;
uint32_t i;
if (!ctrlr->is_initialized)
return;
for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
cons = &nvme_consumer[i];
if (cons->id != INVALID_CONSUMER_ID && cons->ns_fn != NULL &&
(ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL)
ns->cons_cookie[i] = (*cons->ns_fn)(ns, ctrlr_cookie);
}
}
struct nvme_consumer *
nvme_register_consumer(nvme_cons_ns_fn_t ns_fn, nvme_cons_ctrlr_fn_t ctrlr_fn,
nvme_cons_async_fn_t async_fn,
nvme_cons_fail_fn_t fail_fn)
{
int i;
/*
* TODO: add locking around consumer registration.
*/
for (i = 0; i < NVME_MAX_CONSUMERS; i++)
if (nvme_consumer[i].id == INVALID_CONSUMER_ID) {
nvme_consumer[i].id = i;
nvme_consumer[i].ns_fn = ns_fn;
nvme_consumer[i].ctrlr_fn = ctrlr_fn;
nvme_consumer[i].async_fn = async_fn;
nvme_consumer[i].fail_fn = fail_fn;
nvme_notify_new_consumer(&nvme_consumer[i]);
return (&nvme_consumer[i]);
}
printf("nvme(4): consumer not registered - no slots available\n");
return (NULL);
}
void
nvme_unregister_consumer(struct nvme_consumer *consumer)
{
consumer->id = INVALID_CONSUMER_ID;
}
void
nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl)
{
struct nvme_completion_poll_status *status = arg;
/*
* Copy status into the argument passed by the caller, so that
* the caller can check the status to determine if the
* the request passed or failed.
*/
memcpy(&status->cpl, cpl, sizeof(*cpl));
atomic_store_rel_int(&status->done, 1);
}
static int
nvme_modevent(module_t mod __unused, int type __unused, void *argp __unused)
{
return (0);
}
static moduledata_t nvme_mod = {
"nvme",
nvme_modevent,
0
};
DECLARE_MODULE(nvme, nvme_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(nvme, 1);
MODULE_DEPEND(nvme, cam, 1, 1, 1);
