/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include "usnic_common_util.h"
#include "usnic_ib.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_vnic.h"
#include "usnic_ib_verbs.h"
#include "usnic_ib_sysfs.h"
#include "usnic_log.h"
static ssize_t board_id_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
unsigned short subsystem_device_id;
mutex_lock(&us_ibdev->usdev_lock);
subsystem_device_id = us_ibdev->pdev->subsystem_device;
mutex_unlock(&us_ibdev->usdev_lock);
return scnprintf(buf, PAGE_SIZE, "%hu\n", subsystem_device_id);
}
static DEVICE_ATTR_RO(board_id);
/*
* Report the configuration for this PF
*/
static ssize_t
config_show(struct device *device, struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
char *ptr;
unsigned left;
unsigned n;
enum usnic_vnic_res_type res_type;
/* Buffer space limit is 1 page */
ptr = buf;
left = PAGE_SIZE;
mutex_lock(&us_ibdev->usdev_lock);
if (kref_read(&us_ibdev->vf_cnt) > 0) {
char *busname;
/*
* bus name seems to come with annoying prefix.
* Remove it if it is predictable
*/
busname = us_ibdev->pdev->bus->name;
if (strncmp(busname, "PCI Bus ", 8) == 0)
busname += 8;
n = scnprintf(ptr, left,
"%s: %s:%d.%d, %s, %pM, %u VFs\n Per VF:",
dev_name(&us_ibdev->ib_dev.dev),
busname,
PCI_SLOT(us_ibdev->pdev->devfn),
PCI_FUNC(us_ibdev->pdev->devfn),
netdev_name(us_ibdev->netdev),
us_ibdev->ufdev->mac,
kref_read(&us_ibdev->vf_cnt));
UPDATE_PTR_LEFT(n, ptr, left);
for (res_type = USNIC_VNIC_RES_TYPE_EOL;
res_type < USNIC_VNIC_RES_TYPE_MAX;
res_type++) {
if (us_ibdev->vf_res_cnt[res_type] == 0)
continue;
n = scnprintf(ptr, left, " %d %s%s",
us_ibdev->vf_res_cnt[res_type],
usnic_vnic_res_type_to_str(res_type),
(res_type < (USNIC_VNIC_RES_TYPE_MAX - 1)) ?
"," : "");
UPDATE_PTR_LEFT(n, ptr, left);
}
n = scnprintf(ptr, left, "\n");
UPDATE_PTR_LEFT(n, ptr, left);
} else {
n = scnprintf(ptr, left, "%s: no VFs\n",
dev_name(&us_ibdev->ib_dev.dev));
UPDATE_PTR_LEFT(n, ptr, left);
}
mutex_unlock(&us_ibdev->usdev_lock);
return ptr - buf;
}
static DEVICE_ATTR_RO(config);
static ssize_t
iface_show(struct device *device, struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
return scnprintf(buf, PAGE_SIZE, "%s\n",
netdev_name(us_ibdev->netdev));
}
static DEVICE_ATTR_RO(iface);
static ssize_t
max_vf_show(struct device *device, struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
return scnprintf(buf, PAGE_SIZE, "%u\n",
kref_read(&us_ibdev->vf_cnt));
}
static DEVICE_ATTR_RO(max_vf);
static ssize_t
qp_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
int qp_per_vf;
qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
return scnprintf(buf, PAGE_SIZE,
"%d\n", qp_per_vf);
}
static DEVICE_ATTR_RO(qp_per_vf);
static ssize_t
cq_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
{
struct usnic_ib_dev *us_ibdev =
rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
return scnprintf(buf, PAGE_SIZE, "%d\n",
us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
}
static DEVICE_ATTR_RO(cq_per_vf);
static struct attribute *usnic_class_attributes[] = {
&dev_attr_board_id.attr,
&dev_attr_config.attr,
&dev_attr_iface.attr,
&dev_attr_max_vf.attr,
&dev_attr_qp_per_vf.attr,
&dev_attr_cq_per_vf.attr,
NULL
};
const struct attribute_group usnic_attr_group = {
.attrs = usnic_class_attributes,
};
struct qpn_attribute {
struct attribute attr;
ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
};
/*
* Definitions for supporting QPN entries in sysfs
*/
static ssize_t
usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
struct usnic_ib_qp_grp *qp_grp;
struct qpn_attribute *qpn_attr;
qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
qpn_attr = container_of(attr, struct qpn_attribute, attr);
return qpn_attr->show(qp_grp, buf);
}
static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
.show = usnic_ib_qpn_attr_show
};
#define QPN_ATTR_RO(NAME) \
struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "0x%p\n", qp_grp->ctx);
}
static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
{
int i, j, n;
int left;
char *ptr;
struct usnic_vnic_res_chunk *res_chunk;
struct usnic_vnic_res *vnic_res;
left = PAGE_SIZE;
ptr = buf;
n = scnprintf(ptr, left,
"QPN: %d State: (%s) PID: %u VF Idx: %hu ",
qp_grp->ibqp.qp_num,
usnic_ib_qp_grp_state_to_string(qp_grp->state),
qp_grp->owner_pid,
usnic_vnic_get_index(qp_grp->vf->vnic));
UPDATE_PTR_LEFT(n, ptr, left);
for (i = 0; qp_grp->res_chunk_list[i]; i++) {
res_chunk = qp_grp->res_chunk_list[i];
for (j = 0; j < res_chunk->cnt; j++) {
vnic_res = res_chunk->res[j];
n = scnprintf(ptr, left, "%s[%d] ",
usnic_vnic_res_type_to_str(vnic_res->type),
vnic_res->vnic_idx);
UPDATE_PTR_LEFT(n, ptr, left);
}
}
n = scnprintf(ptr, left, "\n");
UPDATE_PTR_LEFT(n, ptr, left);
return ptr - buf;
}
static QPN_ATTR_RO(context);
static QPN_ATTR_RO(summary);
static struct attribute *usnic_ib_qpn_default_attrs[] = {
&qpn_attr_context.attr,
&qpn_attr_summary.attr,
NULL
};
static struct kobj_type usnic_ib_qpn_type = {
.sysfs_ops = &usnic_ib_qpn_sysfs_ops,
.default_attrs = usnic_ib_qpn_default_attrs
};
int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
{
/* create kernel object for looking at individual QPs */
kobject_get(&us_ibdev->ib_dev.dev.kobj);
us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
&us_ibdev->ib_dev.dev.kobj);
if (us_ibdev->qpn_kobj == NULL) {
kobject_put(&us_ibdev->ib_dev.dev.kobj);
return -ENOMEM;
}
return 0;
}
void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
{
kobject_put(us_ibdev->qpn_kobj);
}
void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
{
struct usnic_ib_dev *us_ibdev;
int err;
us_ibdev = qp_grp->vf->pf;
err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
kobject_get(us_ibdev->qpn_kobj),
"%d", qp_grp->grp_id);
if (err) {
kobject_put(us_ibdev->qpn_kobj);
return;
}
}
void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
{
struct usnic_ib_dev *us_ibdev;
us_ibdev = qp_grp->vf->pf;
kobject_put(&qp_grp->kobj);
kobject_put(us_ibdev->qpn_kobj);
}
