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linux/drivers/infiniband/hw/hfi1/sysfs.c
Steven L. Roberts c4dd4b69f5 RDMA/hfi1: fix array termination by appending NULL to attr array 
This fixes a kernel panic when loading the hfi driver as a dynamic module.

Signed-off-by: Steven L Roberts <robers97@gmail.com>
Reviewed-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-06-01 17:03:19 -04:00

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/*
* Copyright(c) 2015-2017 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.
*
* BSD LICENSE
*
* 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 <linux/ctype.h>
#include "hfi.h"
#include "mad.h"
#include "trace.h"
/*
* Start of per-port congestion control structures and support code
*/
/*
* Congestion control table size followed by table entries
*/
static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t count)
{
int ret;
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
struct cc_state *cc_state;
ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
+ sizeof(__be16);
if (pos > ret)
return -EINVAL;
if (count > ret - pos)
count = ret - pos;
if (!count)
return count;
rcu_read_lock();
cc_state = get_cc_state(ppd);
if (!cc_state) {
rcu_read_unlock();
return -EINVAL;
}
memcpy(buf, (void *)&cc_state->cct + pos, count);
rcu_read_unlock();
return count;
}
static void port_release(struct kobject *kobj)
{
/* nothing to do since memory is freed by hfi1_free_devdata() */
}
static struct bin_attribute cc_table_bin_attr = {
.attr = {.name = "cc_table_bin", .mode = 0444},
.read = read_cc_table_bin,
.size = PAGE_SIZE,
};
/*
* Congestion settings: port control, control map and an array of 16
* entries for the congestion entries - increase, timer, event log
* trigger threshold and the minimum injection rate delay.
*/
static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t count)
{
int ret;
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
struct cc_state *cc_state;
ret = sizeof(struct opa_congestion_setting_attr_shadow);
if (pos > ret)
return -EINVAL;
if (count > ret - pos)
count = ret - pos;
if (!count)
return count;
rcu_read_lock();
cc_state = get_cc_state(ppd);
if (!cc_state) {
rcu_read_unlock();
return -EINVAL;
}
memcpy(buf, (void *)&cc_state->cong_setting + pos, count);
rcu_read_unlock();
return count;
}
static struct bin_attribute cc_setting_bin_attr = {
.attr = {.name = "cc_settings_bin", .mode = 0444},
.read = read_cc_setting_bin,
.size = PAGE_SIZE,
};
struct hfi1_port_attr {
struct attribute attr;
ssize_t (*show)(struct hfi1_pportdata *, char *);
ssize_t (*store)(struct hfi1_pportdata *, const char *, size_t);
};
static ssize_t cc_prescan_show(struct hfi1_pportdata *ppd, char *buf)
{
return sprintf(buf, "%s\n", ppd->cc_prescan ? "on" : "off");
}
static ssize_t cc_prescan_store(struct hfi1_pportdata *ppd, const char *buf,
size_t count)
{
if (!memcmp(buf, "on", 2))
ppd->cc_prescan = true;
else if (!memcmp(buf, "off", 3))
ppd->cc_prescan = false;
return count;
}
static struct hfi1_port_attr cc_prescan_attr =
__ATTR(cc_prescan, 0600, cc_prescan_show, cc_prescan_store);
static ssize_t cc_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct hfi1_port_attr *port_attr =
container_of(attr, struct hfi1_port_attr, attr);
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
return port_attr->show(ppd, buf);
}
static ssize_t cc_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t count)
{
struct hfi1_port_attr *port_attr =
container_of(attr, struct hfi1_port_attr, attr);
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
return port_attr->store(ppd, buf, count);
}
static const struct sysfs_ops port_cc_sysfs_ops = {
.show = cc_attr_show,
.store = cc_attr_store
};
static struct attribute *port_cc_default_attributes[] = {
&cc_prescan_attr.attr,
NULL
};
static struct kobj_type port_cc_ktype = {
.release = port_release,
.sysfs_ops = &port_cc_sysfs_ops,
.default_attrs = port_cc_default_attributes
};
/* Start sc2vl */
#define HFI1_SC2VL_ATTR(N) \
static struct hfi1_sc2vl_attr hfi1_sc2vl_attr_##N = { \
.attr = { .name = __stringify(N), .mode = 0444 }, \
.sc = N \
}
struct hfi1_sc2vl_attr {
struct attribute attr;
int sc;
};
HFI1_SC2VL_ATTR(0);
HFI1_SC2VL_ATTR(1);
HFI1_SC2VL_ATTR(2);
HFI1_SC2VL_ATTR(3);
HFI1_SC2VL_ATTR(4);
HFI1_SC2VL_ATTR(5);
HFI1_SC2VL_ATTR(6);
HFI1_SC2VL_ATTR(7);
HFI1_SC2VL_ATTR(8);
HFI1_SC2VL_ATTR(9);
HFI1_SC2VL_ATTR(10);
HFI1_SC2VL_ATTR(11);
HFI1_SC2VL_ATTR(12);
HFI1_SC2VL_ATTR(13);
HFI1_SC2VL_ATTR(14);
HFI1_SC2VL_ATTR(15);
HFI1_SC2VL_ATTR(16);
HFI1_SC2VL_ATTR(17);
HFI1_SC2VL_ATTR(18);
HFI1_SC2VL_ATTR(19);
HFI1_SC2VL_ATTR(20);
HFI1_SC2VL_ATTR(21);
HFI1_SC2VL_ATTR(22);
HFI1_SC2VL_ATTR(23);
HFI1_SC2VL_ATTR(24);
HFI1_SC2VL_ATTR(25);
HFI1_SC2VL_ATTR(26);
HFI1_SC2VL_ATTR(27);
HFI1_SC2VL_ATTR(28);
HFI1_SC2VL_ATTR(29);
HFI1_SC2VL_ATTR(30);
HFI1_SC2VL_ATTR(31);
static struct attribute *sc2vl_default_attributes[] = {
&hfi1_sc2vl_attr_0.attr,
&hfi1_sc2vl_attr_1.attr,
&hfi1_sc2vl_attr_2.attr,
&hfi1_sc2vl_attr_3.attr,
&hfi1_sc2vl_attr_4.attr,
&hfi1_sc2vl_attr_5.attr,
&hfi1_sc2vl_attr_6.attr,
&hfi1_sc2vl_attr_7.attr,
&hfi1_sc2vl_attr_8.attr,
&hfi1_sc2vl_attr_9.attr,
&hfi1_sc2vl_attr_10.attr,
&hfi1_sc2vl_attr_11.attr,
&hfi1_sc2vl_attr_12.attr,
&hfi1_sc2vl_attr_13.attr,
&hfi1_sc2vl_attr_14.attr,
&hfi1_sc2vl_attr_15.attr,
&hfi1_sc2vl_attr_16.attr,
&hfi1_sc2vl_attr_17.attr,
&hfi1_sc2vl_attr_18.attr,
&hfi1_sc2vl_attr_19.attr,
&hfi1_sc2vl_attr_20.attr,
&hfi1_sc2vl_attr_21.attr,
&hfi1_sc2vl_attr_22.attr,
&hfi1_sc2vl_attr_23.attr,
&hfi1_sc2vl_attr_24.attr,
&hfi1_sc2vl_attr_25.attr,
&hfi1_sc2vl_attr_26.attr,
&hfi1_sc2vl_attr_27.attr,
&hfi1_sc2vl_attr_28.attr,
&hfi1_sc2vl_attr_29.attr,
&hfi1_sc2vl_attr_30.attr,
&hfi1_sc2vl_attr_31.attr,
NULL
};
static ssize_t sc2vl_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct hfi1_sc2vl_attr *sattr =
container_of(attr, struct hfi1_sc2vl_attr, attr);
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, sc2vl_kobj);
struct hfi1_devdata *dd = ppd->dd;
return sprintf(buf, "%u\n", *((u8 *)dd->sc2vl + sattr->sc));
}
static const struct sysfs_ops hfi1_sc2vl_ops = {
.show = sc2vl_attr_show,
};
static struct kobj_type hfi1_sc2vl_ktype = {
.release = port_release,
.sysfs_ops = &hfi1_sc2vl_ops,
.default_attrs = sc2vl_default_attributes
};
/* End sc2vl */
/* Start sl2sc */
#define HFI1_SL2SC_ATTR(N) \
static struct hfi1_sl2sc_attr hfi1_sl2sc_attr_##N = { \
.attr = { .name = __stringify(N), .mode = 0444 }, \
.sl = N \
}
struct hfi1_sl2sc_attr {
struct attribute attr;
int sl;
};
HFI1_SL2SC_ATTR(0);
HFI1_SL2SC_ATTR(1);
HFI1_SL2SC_ATTR(2);
HFI1_SL2SC_ATTR(3);
HFI1_SL2SC_ATTR(4);
HFI1_SL2SC_ATTR(5);
HFI1_SL2SC_ATTR(6);
HFI1_SL2SC_ATTR(7);
HFI1_SL2SC_ATTR(8);
HFI1_SL2SC_ATTR(9);
HFI1_SL2SC_ATTR(10);
HFI1_SL2SC_ATTR(11);
HFI1_SL2SC_ATTR(12);
HFI1_SL2SC_ATTR(13);
HFI1_SL2SC_ATTR(14);
HFI1_SL2SC_ATTR(15);
HFI1_SL2SC_ATTR(16);
HFI1_SL2SC_ATTR(17);
HFI1_SL2SC_ATTR(18);
HFI1_SL2SC_ATTR(19);
HFI1_SL2SC_ATTR(20);
HFI1_SL2SC_ATTR(21);
HFI1_SL2SC_ATTR(22);
HFI1_SL2SC_ATTR(23);
HFI1_SL2SC_ATTR(24);
HFI1_SL2SC_ATTR(25);
HFI1_SL2SC_ATTR(26);
HFI1_SL2SC_ATTR(27);
HFI1_SL2SC_ATTR(28);
HFI1_SL2SC_ATTR(29);
HFI1_SL2SC_ATTR(30);
HFI1_SL2SC_ATTR(31);
static struct attribute *sl2sc_default_attributes[] = {
&hfi1_sl2sc_attr_0.attr,
&hfi1_sl2sc_attr_1.attr,
&hfi1_sl2sc_attr_2.attr,
&hfi1_sl2sc_attr_3.attr,
&hfi1_sl2sc_attr_4.attr,
&hfi1_sl2sc_attr_5.attr,
&hfi1_sl2sc_attr_6.attr,
&hfi1_sl2sc_attr_7.attr,
&hfi1_sl2sc_attr_8.attr,
&hfi1_sl2sc_attr_9.attr,
&hfi1_sl2sc_attr_10.attr,
&hfi1_sl2sc_attr_11.attr,
&hfi1_sl2sc_attr_12.attr,
&hfi1_sl2sc_attr_13.attr,
&hfi1_sl2sc_attr_14.attr,
&hfi1_sl2sc_attr_15.attr,
&hfi1_sl2sc_attr_16.attr,
&hfi1_sl2sc_attr_17.attr,
&hfi1_sl2sc_attr_18.attr,
&hfi1_sl2sc_attr_19.attr,
&hfi1_sl2sc_attr_20.attr,
&hfi1_sl2sc_attr_21.attr,
&hfi1_sl2sc_attr_22.attr,
&hfi1_sl2sc_attr_23.attr,
&hfi1_sl2sc_attr_24.attr,
&hfi1_sl2sc_attr_25.attr,
&hfi1_sl2sc_attr_26.attr,
&hfi1_sl2sc_attr_27.attr,
&hfi1_sl2sc_attr_28.attr,
&hfi1_sl2sc_attr_29.attr,
&hfi1_sl2sc_attr_30.attr,
&hfi1_sl2sc_attr_31.attr,
NULL
};
static ssize_t sl2sc_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct hfi1_sl2sc_attr *sattr =
container_of(attr, struct hfi1_sl2sc_attr, attr);
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, sl2sc_kobj);
struct hfi1_ibport *ibp = &ppd->ibport_data;
return sprintf(buf, "%u\n", ibp->sl_to_sc[sattr->sl]);
}
static const struct sysfs_ops hfi1_sl2sc_ops = {
.show = sl2sc_attr_show,
};
static struct kobj_type hfi1_sl2sc_ktype = {
.release = port_release,
.sysfs_ops = &hfi1_sl2sc_ops,
.default_attrs = sl2sc_default_attributes
};
/* End sl2sc */
/* Start vl2mtu */
#define HFI1_VL2MTU_ATTR(N) \
static struct hfi1_vl2mtu_attr hfi1_vl2mtu_attr_##N = { \
.attr = { .name = __stringify(N), .mode = 0444 }, \
.vl = N \
}
struct hfi1_vl2mtu_attr {
struct attribute attr;
int vl;
};
HFI1_VL2MTU_ATTR(0);
HFI1_VL2MTU_ATTR(1);
HFI1_VL2MTU_ATTR(2);
HFI1_VL2MTU_ATTR(3);
HFI1_VL2MTU_ATTR(4);
HFI1_VL2MTU_ATTR(5);
HFI1_VL2MTU_ATTR(6);
HFI1_VL2MTU_ATTR(7);
HFI1_VL2MTU_ATTR(8);
HFI1_VL2MTU_ATTR(9);
HFI1_VL2MTU_ATTR(10);
HFI1_VL2MTU_ATTR(11);
HFI1_VL2MTU_ATTR(12);
HFI1_VL2MTU_ATTR(13);
HFI1_VL2MTU_ATTR(14);
HFI1_VL2MTU_ATTR(15);
static struct attribute *vl2mtu_default_attributes[] = {
&hfi1_vl2mtu_attr_0.attr,
&hfi1_vl2mtu_attr_1.attr,
&hfi1_vl2mtu_attr_2.attr,
&hfi1_vl2mtu_attr_3.attr,
&hfi1_vl2mtu_attr_4.attr,
&hfi1_vl2mtu_attr_5.attr,
&hfi1_vl2mtu_attr_6.attr,
&hfi1_vl2mtu_attr_7.attr,
&hfi1_vl2mtu_attr_8.attr,
&hfi1_vl2mtu_attr_9.attr,
&hfi1_vl2mtu_attr_10.attr,
&hfi1_vl2mtu_attr_11.attr,
&hfi1_vl2mtu_attr_12.attr,
&hfi1_vl2mtu_attr_13.attr,
&hfi1_vl2mtu_attr_14.attr,
&hfi1_vl2mtu_attr_15.attr,
NULL
};
static ssize_t vl2mtu_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct hfi1_vl2mtu_attr *vlattr =
container_of(attr, struct hfi1_vl2mtu_attr, attr);
struct hfi1_pportdata *ppd =
container_of(kobj, struct hfi1_pportdata, vl2mtu_kobj);
struct hfi1_devdata *dd = ppd->dd;
return sprintf(buf, "%u\n", dd->vld[vlattr->vl].mtu);
}
static const struct sysfs_ops hfi1_vl2mtu_ops = {
.show = vl2mtu_attr_show,
};
static struct kobj_type hfi1_vl2mtu_ktype = {
.release = port_release,
.sysfs_ops = &hfi1_vl2mtu_ops,
.default_attrs = vl2mtu_default_attributes
};
/* end of per-port file structures and support code */
/*
* Start of per-unit (or driver, in some cases, but replicated
* per unit) functions (these get a device *)
*/
static ssize_t show_rev(struct device *device, struct device_attribute *attr,
char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
}
static ssize_t show_hfi(struct device *device, struct device_attribute *attr,
char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
int ret;
if (!dd->boardname)
ret = -EINVAL;
else
ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
return ret;
}
static ssize_t show_boardversion(struct device *device,
struct device_attribute *attr, char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
/* The string printed here is already newline-terminated. */
return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
}
static ssize_t show_nctxts(struct device *device,
struct device_attribute *attr, char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
/*
* Return the smaller of send and receive contexts.
* Normally, user level applications would require both a send
* and a receive context, so returning the smaller of the two counts
* give a more accurate picture of total contexts available.
*/
return scnprintf(buf, PAGE_SIZE, "%u\n",
min(dd->num_rcv_contexts - dd->first_dyn_alloc_ctxt,
(u32)dd->sc_sizes[SC_USER].count));
}
static ssize_t show_nfreectxts(struct device *device,
struct device_attribute *attr, char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
/* Return the number of free user ports (contexts) available. */
return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
}
static ssize_t show_serial(struct device *device,
struct device_attribute *attr, char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
return scnprintf(buf, PAGE_SIZE, "%s", dd->serial);
}
static ssize_t store_chip_reset(struct device *device,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
int ret;
if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
ret = -EINVAL;
goto bail;
}
ret = hfi1_reset_device(dd->unit);
bail:
return ret < 0 ? ret : count;
}
/*
* Convert the reported temperature from an integer (reported in
* units of 0.25C) to a floating point number.
*/
#define temp2str(temp, buf, size, idx) \
scnprintf((buf) + (idx), (size) - (idx), "%u.%02u ", \
((temp) >> 2), ((temp) & 0x3) * 25)
/*
* Dump tempsense values, in decimal, to ease shell-scripts.
*/
static ssize_t show_tempsense(struct device *device,
struct device_attribute *attr, char *buf)
{
struct hfi1_ibdev *dev =
container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
struct hfi1_devdata *dd = dd_from_dev(dev);
struct hfi1_temp temp;
int ret;
ret = hfi1_tempsense_rd(dd, &temp);
if (!ret) {
int idx = 0;
idx += temp2str(temp.curr, buf, PAGE_SIZE, idx);
idx += temp2str(temp.lo_lim, buf, PAGE_SIZE, idx);
idx += temp2str(temp.hi_lim, buf, PAGE_SIZE, idx);
idx += temp2str(temp.crit_lim, buf, PAGE_SIZE, idx);
idx += scnprintf(buf + idx, PAGE_SIZE - idx,
"%u %u %u\n", temp.triggers & 0x1,
temp.triggers & 0x2, temp.triggers & 0x4);
ret = idx;
}
return ret;
}
/*
* end of per-unit (or driver, in some cases, but replicated
* per unit) functions
*/
/* start of per-unit file structures and support code */
static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_hfi, NULL);
static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);
static struct device_attribute *hfi1_attributes[] = {
&dev_attr_hw_rev,
&dev_attr_board_id,
&dev_attr_nctxts,
&dev_attr_nfreectxts,
&dev_attr_serial,
&dev_attr_boardversion,
&dev_attr_tempsense,
&dev_attr_chip_reset,
};
int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
struct kobject *kobj)
{
struct hfi1_pportdata *ppd;
struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
int ret;
if (!port_num || port_num > dd->num_pports) {
dd_dev_err(dd,
"Skipping infiniband class with invalid port %u\n",
port_num);
return -ENODEV;
}
ppd = &dd->pport[port_num - 1];
ret = kobject_init_and_add(&ppd->sc2vl_kobj, &hfi1_sc2vl_ktype, kobj,
"sc2vl");
if (ret) {
dd_dev_err(dd,
"Skipping sc2vl sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail;
}
kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);
ret = kobject_init_and_add(&ppd->sl2sc_kobj, &hfi1_sl2sc_ktype, kobj,
"sl2sc");
if (ret) {
dd_dev_err(dd,
"Skipping sl2sc sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_sc2vl;
}
kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);
ret = kobject_init_and_add(&ppd->vl2mtu_kobj, &hfi1_vl2mtu_ktype, kobj,
"vl2mtu");
if (ret) {
dd_dev_err(dd,
"Skipping vl2mtu sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_sl2sc;
}
kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);
ret = kobject_init_and_add(&ppd->pport_cc_kobj, &port_cc_ktype,
kobj, "CCMgtA");
if (ret) {
dd_dev_err(dd,
"Skipping Congestion Control sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_vl2mtu;
}
kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
if (ret) {
dd_dev_err(dd,
"Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_cc;
}
ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_table_bin_attr);
if (ret) {
dd_dev_err(dd,
"Skipping Congestion Control table sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_cc_entry_bin;
}
dd_dev_info(dd,
"Congestion Control Agent enabled for port %d\n",
port_num);
return 0;
bail_cc_entry_bin:
sysfs_remove_bin_file(&ppd->pport_cc_kobj,
&cc_setting_bin_attr);
bail_cc:
kobject_put(&ppd->pport_cc_kobj);
bail_vl2mtu:
kobject_put(&ppd->vl2mtu_kobj);
bail_sl2sc:
kobject_put(&ppd->sl2sc_kobj);
bail_sc2vl:
kobject_put(&ppd->sc2vl_kobj);
bail:
return ret;
}
struct sde_attribute {
struct attribute attr;
ssize_t (*show)(struct sdma_engine *sde, char *buf);
ssize_t (*store)(struct sdma_engine *sde, const char *buf, size_t cnt);
};
static ssize_t sde_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
struct sde_attribute *sde_attr =
container_of(attr, struct sde_attribute, attr);
struct sdma_engine *sde =
container_of(kobj, struct sdma_engine, kobj);
if (!sde_attr->show)
return -EINVAL;
return sde_attr->show(sde, buf);
}
static ssize_t sde_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t count)
{
struct sde_attribute *sde_attr =
container_of(attr, struct sde_attribute, attr);
struct sdma_engine *sde =
container_of(kobj, struct sdma_engine, kobj);
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!sde_attr->store)
return -EINVAL;
return sde_attr->store(sde, buf, count);
}
static const struct sysfs_ops sde_sysfs_ops = {
.show = sde_show,
.store = sde_store,
};
static struct kobj_type sde_ktype = {
.sysfs_ops = &sde_sysfs_ops,
};
#define SDE_ATTR(_name, _mode, _show, _store) \
struct sde_attribute sde_attr_##_name = \
__ATTR(_name, _mode, _show, _store)
static ssize_t sde_show_cpu_to_sde_map(struct sdma_engine *sde, char *buf)
{
return sdma_get_cpu_to_sde_map(sde, buf);
}
static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
const char *buf, size_t count)
{
return sdma_set_cpu_to_sde_map(sde, buf, count);
}
static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
{
int vl;
vl = sdma_engine_get_vl(sde);
if (vl < 0)
return vl;
return snprintf(buf, PAGE_SIZE, "%d\n", vl);
}
static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
sde_show_cpu_to_sde_map,
sde_store_cpu_to_sde_map);
static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);
static struct sde_attribute *sde_attribs[] = {
&sde_attr_cpu_list,
&sde_attr_vl
};
/*
* Register and create our files in /sys/class/infiniband.
*/
int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
{
struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
struct device *class_dev = &dev->dev;
int i, j, ret;
for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i) {
ret = device_create_file(&dev->dev, hfi1_attributes[i]);
if (ret)
goto bail;
}
for (i = 0; i < dd->num_sdma; i++) {
ret = kobject_init_and_add(&dd->per_sdma[i].kobj,
&sde_ktype, &class_dev->kobj,
"sdma%d", i);
if (ret)
goto bail;
for (j = 0; j < ARRAY_SIZE(sde_attribs); j++) {
ret = sysfs_create_file(&dd->per_sdma[i].kobj,
&sde_attribs[j]->attr);
if (ret)
goto bail;
}
}
return 0;
bail:
for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i)
device_remove_file(&dev->dev, hfi1_attributes[i]);
for (i = 0; i < dd->num_sdma; i++)
kobject_del(&dd->per_sdma[i].kobj);
return ret;
}
/*
* Unregister and remove our files in /sys/class/infiniband.
*/
void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
{
struct hfi1_pportdata *ppd;
int i;
for (i = 0; i < dd->num_pports; i++) {
ppd = &dd->pport[i];
sysfs_remove_bin_file(&ppd->pport_cc_kobj,
&cc_setting_bin_attr);
sysfs_remove_bin_file(&ppd->pport_cc_kobj,
&cc_table_bin_attr);
kobject_put(&ppd->pport_cc_kobj);
kobject_put(&ppd->vl2mtu_kobj);
kobject_put(&ppd->sl2sc_kobj);
kobject_put(&ppd->sc2vl_kobj);
}
}
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