mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 03:26:40 +07:00
ee959b00c3
It's big, but there doesn't seem to be a way to split it up smaller... Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Roland Dreier <rolandd@cisco.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
384 lines
10 KiB
C
384 lines
10 KiB
C
/*
|
|
* SCSI RDMA (SRP) transport class
|
|
*
|
|
* Copyright (C) 2007 FUJITA Tomonori <tomof@acm.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation, version 2 of the
|
|
* License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_device.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <scsi/scsi_transport.h>
|
|
#include <scsi/scsi_transport_srp.h>
|
|
#include "scsi_transport_srp_internal.h"
|
|
|
|
struct srp_host_attrs {
|
|
atomic_t next_port_id;
|
|
};
|
|
#define to_srp_host_attrs(host) ((struct srp_host_attrs *)(host)->shost_data)
|
|
|
|
#define SRP_HOST_ATTRS 0
|
|
#define SRP_RPORT_ATTRS 2
|
|
|
|
struct srp_internal {
|
|
struct scsi_transport_template t;
|
|
struct srp_function_template *f;
|
|
|
|
struct device_attribute *host_attrs[SRP_HOST_ATTRS + 1];
|
|
|
|
struct device_attribute *rport_attrs[SRP_RPORT_ATTRS + 1];
|
|
struct device_attribute private_rport_attrs[SRP_RPORT_ATTRS];
|
|
struct transport_container rport_attr_cont;
|
|
};
|
|
|
|
#define to_srp_internal(tmpl) container_of(tmpl, struct srp_internal, t)
|
|
|
|
#define dev_to_rport(d) container_of(d, struct srp_rport, dev)
|
|
#define transport_class_to_srp_rport(dev) dev_to_rport((dev)->parent)
|
|
|
|
static int srp_host_setup(struct transport_container *tc, struct device *dev,
|
|
struct device *cdev)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(dev);
|
|
struct srp_host_attrs *srp_host = to_srp_host_attrs(shost);
|
|
|
|
atomic_set(&srp_host->next_port_id, 0);
|
|
return 0;
|
|
}
|
|
|
|
static DECLARE_TRANSPORT_CLASS(srp_host_class, "srp_host", srp_host_setup,
|
|
NULL, NULL);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(srp_rport_class, "srp_remote_ports",
|
|
NULL, NULL, NULL);
|
|
|
|
#define SETUP_TEMPLATE(attrb, field, perm, test, ro_test, ro_perm) \
|
|
i->private_##attrb[count] = dev_attr_##field; \
|
|
i->private_##attrb[count].attr.mode = perm; \
|
|
if (ro_test) { \
|
|
i->private_##attrb[count].attr.mode = ro_perm; \
|
|
i->private_##attrb[count].store = NULL; \
|
|
} \
|
|
i->attrb[count] = &i->private_##attrb[count]; \
|
|
if (test) \
|
|
count++
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE_RD(field) \
|
|
SETUP_TEMPLATE(rport_attrs, field, S_IRUGO, 1, 0, 0)
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE_RW(field) \
|
|
SETUP_TEMPLATE(rport_attrs, field, S_IRUGO | S_IWUSR, \
|
|
1, 1, S_IRUGO)
|
|
|
|
#define SRP_PID(p) \
|
|
(p)->port_id[0], (p)->port_id[1], (p)->port_id[2], (p)->port_id[3], \
|
|
(p)->port_id[4], (p)->port_id[5], (p)->port_id[6], (p)->port_id[7], \
|
|
(p)->port_id[8], (p)->port_id[9], (p)->port_id[10], (p)->port_id[11], \
|
|
(p)->port_id[12], (p)->port_id[13], (p)->port_id[14], (p)->port_id[15]
|
|
|
|
#define SRP_PID_FMT "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:" \
|
|
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x"
|
|
|
|
static ssize_t
|
|
show_srp_rport_id(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct srp_rport *rport = transport_class_to_srp_rport(dev);
|
|
return sprintf(buf, SRP_PID_FMT "\n", SRP_PID(rport));
|
|
}
|
|
|
|
static DEVICE_ATTR(port_id, S_IRUGO, show_srp_rport_id, NULL);
|
|
|
|
static const struct {
|
|
u32 value;
|
|
char *name;
|
|
} srp_rport_role_names[] = {
|
|
{SRP_RPORT_ROLE_INITIATOR, "SRP Initiator"},
|
|
{SRP_RPORT_ROLE_TARGET, "SRP Target"},
|
|
};
|
|
|
|
static ssize_t
|
|
show_srp_rport_roles(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct srp_rport *rport = transport_class_to_srp_rport(dev);
|
|
int i;
|
|
char *name = NULL;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(srp_rport_role_names); i++)
|
|
if (srp_rport_role_names[i].value == rport->roles) {
|
|
name = srp_rport_role_names[i].name;
|
|
break;
|
|
}
|
|
return sprintf(buf, "%s\n", name ? : "unknown");
|
|
}
|
|
|
|
static DEVICE_ATTR(roles, S_IRUGO, show_srp_rport_roles, NULL);
|
|
|
|
static void srp_rport_release(struct device *dev)
|
|
{
|
|
struct srp_rport *rport = dev_to_rport(dev);
|
|
|
|
put_device(dev->parent);
|
|
kfree(rport);
|
|
}
|
|
|
|
static int scsi_is_srp_rport(const struct device *dev)
|
|
{
|
|
return dev->release == srp_rport_release;
|
|
}
|
|
|
|
static int srp_rport_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct srp_internal *i;
|
|
|
|
if (!scsi_is_srp_rport(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev->parent);
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class != &srp_host_class.class)
|
|
return 0;
|
|
|
|
i = to_srp_internal(shost->transportt);
|
|
return &i->rport_attr_cont.ac == cont;
|
|
}
|
|
|
|
static int srp_host_match(struct attribute_container *cont, struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct srp_internal *i;
|
|
|
|
if (!scsi_is_host_device(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev);
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class != &srp_host_class.class)
|
|
return 0;
|
|
|
|
i = to_srp_internal(shost->transportt);
|
|
return &i->t.host_attrs.ac == cont;
|
|
}
|
|
|
|
/**
|
|
* srp_rport_add - add a SRP remote port to the device hierarchy
|
|
* @shost: scsi host the remote port is connected to.
|
|
* @ids: The port id for the remote port.
|
|
*
|
|
* Publishes a port to the rest of the system.
|
|
*/
|
|
struct srp_rport *srp_rport_add(struct Scsi_Host *shost,
|
|
struct srp_rport_identifiers *ids)
|
|
{
|
|
struct srp_rport *rport;
|
|
struct device *parent = &shost->shost_gendev;
|
|
int id, ret;
|
|
|
|
rport = kzalloc(sizeof(*rport), GFP_KERNEL);
|
|
if (!rport)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
device_initialize(&rport->dev);
|
|
|
|
rport->dev.parent = get_device(parent);
|
|
rport->dev.release = srp_rport_release;
|
|
|
|
memcpy(rport->port_id, ids->port_id, sizeof(rport->port_id));
|
|
rport->roles = ids->roles;
|
|
|
|
id = atomic_inc_return(&to_srp_host_attrs(shost)->next_port_id);
|
|
sprintf(rport->dev.bus_id, "port-%d:%d", shost->host_no, id);
|
|
|
|
transport_setup_device(&rport->dev);
|
|
|
|
ret = device_add(&rport->dev);
|
|
if (ret) {
|
|
transport_destroy_device(&rport->dev);
|
|
put_device(&rport->dev);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
if (shost->active_mode & MODE_TARGET &&
|
|
ids->roles == SRP_RPORT_ROLE_INITIATOR) {
|
|
ret = srp_tgt_it_nexus_create(shost, (unsigned long)rport,
|
|
rport->port_id);
|
|
if (ret) {
|
|
device_del(&rport->dev);
|
|
transport_destroy_device(&rport->dev);
|
|
put_device(&rport->dev);
|
|
return ERR_PTR(ret);
|
|
}
|
|
}
|
|
|
|
transport_add_device(&rport->dev);
|
|
transport_configure_device(&rport->dev);
|
|
|
|
return rport;
|
|
}
|
|
EXPORT_SYMBOL_GPL(srp_rport_add);
|
|
|
|
/**
|
|
* srp_rport_del - remove a SRP remote port
|
|
* @rport: SRP remote port to remove
|
|
*
|
|
* Removes the specified SRP remote port.
|
|
*/
|
|
void srp_rport_del(struct srp_rport *rport)
|
|
{
|
|
struct device *dev = &rport->dev;
|
|
struct Scsi_Host *shost = dev_to_shost(dev->parent);
|
|
|
|
if (shost->active_mode & MODE_TARGET &&
|
|
rport->roles == SRP_RPORT_ROLE_INITIATOR)
|
|
srp_tgt_it_nexus_destroy(shost, (unsigned long)rport);
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
transport_destroy_device(dev);
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(srp_rport_del);
|
|
|
|
static int do_srp_rport_del(struct device *dev, void *data)
|
|
{
|
|
if (scsi_is_srp_rport(dev))
|
|
srp_rport_del(dev_to_rport(dev));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* srp_remove_host - tear down a Scsi_Host's SRP data structures
|
|
* @shost: Scsi Host that is torn down
|
|
*
|
|
* Removes all SRP remote ports for a given Scsi_Host.
|
|
* Must be called just before scsi_remove_host for SRP HBAs.
|
|
*/
|
|
void srp_remove_host(struct Scsi_Host *shost)
|
|
{
|
|
device_for_each_child(&shost->shost_gendev, NULL, do_srp_rport_del);
|
|
}
|
|
EXPORT_SYMBOL_GPL(srp_remove_host);
|
|
|
|
static int srp_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
|
|
int result)
|
|
{
|
|
struct srp_internal *i = to_srp_internal(shost->transportt);
|
|
return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
|
|
}
|
|
|
|
static int srp_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
|
|
{
|
|
struct srp_internal *i = to_srp_internal(shost->transportt);
|
|
return i->f->it_nexus_response(shost, nexus, result);
|
|
}
|
|
|
|
/**
|
|
* srp_attach_transport - instantiate SRP transport template
|
|
* @ft: SRP transport class function template
|
|
*/
|
|
struct scsi_transport_template *
|
|
srp_attach_transport(struct srp_function_template *ft)
|
|
{
|
|
int count;
|
|
struct srp_internal *i;
|
|
|
|
i = kzalloc(sizeof(*i), GFP_KERNEL);
|
|
if (!i)
|
|
return NULL;
|
|
|
|
i->t.tsk_mgmt_response = srp_tsk_mgmt_response;
|
|
i->t.it_nexus_response = srp_it_nexus_response;
|
|
|
|
i->t.host_size = sizeof(struct srp_host_attrs);
|
|
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
|
|
i->t.host_attrs.ac.class = &srp_host_class.class;
|
|
i->t.host_attrs.ac.match = srp_host_match;
|
|
i->host_attrs[0] = NULL;
|
|
transport_container_register(&i->t.host_attrs);
|
|
|
|
i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
|
|
i->rport_attr_cont.ac.class = &srp_rport_class.class;
|
|
i->rport_attr_cont.ac.match = srp_rport_match;
|
|
transport_container_register(&i->rport_attr_cont);
|
|
|
|
count = 0;
|
|
SETUP_RPORT_ATTRIBUTE_RD(port_id);
|
|
SETUP_RPORT_ATTRIBUTE_RD(roles);
|
|
i->rport_attrs[count] = NULL;
|
|
|
|
i->f = ft;
|
|
|
|
return &i->t;
|
|
}
|
|
EXPORT_SYMBOL_GPL(srp_attach_transport);
|
|
|
|
/**
|
|
* srp_release_transport - release SRP transport template instance
|
|
* @t: transport template instance
|
|
*/
|
|
void srp_release_transport(struct scsi_transport_template *t)
|
|
{
|
|
struct srp_internal *i = to_srp_internal(t);
|
|
|
|
transport_container_unregister(&i->t.host_attrs);
|
|
transport_container_unregister(&i->rport_attr_cont);
|
|
|
|
kfree(i);
|
|
}
|
|
EXPORT_SYMBOL_GPL(srp_release_transport);
|
|
|
|
static __init int srp_transport_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = transport_class_register(&srp_host_class);
|
|
if (ret)
|
|
return ret;
|
|
ret = transport_class_register(&srp_rport_class);
|
|
if (ret)
|
|
goto unregister_host_class;
|
|
|
|
return 0;
|
|
unregister_host_class:
|
|
transport_class_unregister(&srp_host_class);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit srp_transport_exit(void)
|
|
{
|
|
transport_class_unregister(&srp_host_class);
|
|
transport_class_unregister(&srp_rport_class);
|
|
}
|
|
|
|
MODULE_AUTHOR("FUJITA Tomonori");
|
|
MODULE_DESCRIPTION("SRP Transport Attributes");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(srp_transport_init);
|
|
module_exit(srp_transport_exit);
|