blob: 2ced236e1553c97c54829a387af413b87f819977 [file] [log] [blame]
/*
* Copyright(c) 2015-2018 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/debugfs.h>
#include <linux/seq_file.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ratelimit.h>
#include <linux/fault-inject.h>
#include "hfi.h"
#include "trace.h"
#include "debugfs.h"
#include "device.h"
#include "qp.h"
#include "sdma.h"
#include "fault.h"
static struct dentry *hfi1_dbg_root;
/* wrappers to enforce srcu in seq file */
ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
loff_t *ppos)
{
struct dentry *d = file->f_path.dentry;
ssize_t r;
r = debugfs_file_get(d);
if (unlikely(r))
return r;
r = seq_read(file, buf, size, ppos);
debugfs_file_put(d);
return r;
}
loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence)
{
struct dentry *d = file->f_path.dentry;
loff_t r;
r = debugfs_file_get(d);
if (unlikely(r))
return r;
r = seq_lseek(file, offset, whence);
debugfs_file_put(d);
return r;
}
#define private2dd(file) (file_inode(file)->i_private)
#define private2ppd(file) (file_inode(file)->i_private)
static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_opcode_stats_perctx *opstats;
if (*pos >= ARRAY_SIZE(opstats->stats))
return NULL;
return pos;
}
static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_opcode_stats_perctx *opstats;
++*pos;
if (*pos >= ARRAY_SIZE(opstats->stats))
return NULL;
return pos;
}
static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
{
}
static int opcode_stats_show(struct seq_file *s, u8 i, u64 packets, u64 bytes)
{
if (!packets && !bytes)
return SEQ_SKIP;
seq_printf(s, "%02x %llu/%llu\n", i,
(unsigned long long)packets,
(unsigned long long)bytes);
return 0;
}
static int _opcode_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
loff_t i = *spos, j;
u64 n_packets = 0, n_bytes = 0;
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct hfi1_ctxtdata *rcd;
for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
rcd = hfi1_rcd_get_by_index(dd, j);
if (rcd) {
n_packets += rcd->opstats->stats[i].n_packets;
n_bytes += rcd->opstats->stats[i].n_bytes;
}
hfi1_rcd_put(rcd);
}
return opcode_stats_show(s, i, n_packets, n_bytes);
}
DEBUGFS_SEQ_FILE_OPS(opcode_stats);
DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
DEBUGFS_FILE_OPS(opcode_stats);
static void *_tx_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
{
return _opcode_stats_seq_start(s, pos);
}
static void *_tx_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
return _opcode_stats_seq_next(s, v, pos);
}
static void _tx_opcode_stats_seq_stop(struct seq_file *s, void *v)
{
}
static int _tx_opcode_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
loff_t i = *spos;
int j;
u64 n_packets = 0, n_bytes = 0;
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
for_each_possible_cpu(j) {
struct hfi1_opcode_stats_perctx *s =
per_cpu_ptr(dd->tx_opstats, j);
n_packets += s->stats[i].n_packets;
n_bytes += s->stats[i].n_bytes;
}
return opcode_stats_show(s, i, n_packets, n_bytes);
}
DEBUGFS_SEQ_FILE_OPS(tx_opcode_stats);
DEBUGFS_SEQ_FILE_OPEN(tx_opcode_stats)
DEBUGFS_FILE_OPS(tx_opcode_stats);
static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
if (!*pos)
return SEQ_START_TOKEN;
if (*pos >= dd->first_dyn_alloc_ctxt)
return NULL;
return pos;
}
static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
if (v == SEQ_START_TOKEN)
return pos;
++*pos;
if (*pos >= dd->first_dyn_alloc_ctxt)
return NULL;
return pos;
}
static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
{
/* nothing allocated */
}
static int _ctx_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos;
loff_t i, j;
u64 n_packets = 0;
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct hfi1_ctxtdata *rcd;
if (v == SEQ_START_TOKEN) {
seq_puts(s, "Ctx:npkts\n");
return 0;
}
spos = v;
i = *spos;
rcd = hfi1_rcd_get_by_index_safe(dd, i);
if (!rcd)
return SEQ_SKIP;
for (j = 0; j < ARRAY_SIZE(rcd->opstats->stats); j++)
n_packets += rcd->opstats->stats[j].n_packets;
hfi1_rcd_put(rcd);
if (!n_packets)
return SEQ_SKIP;
seq_printf(s, " %llu:%llu\n", i, n_packets);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(ctx_stats);
DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
DEBUGFS_FILE_OPS(ctx_stats);
static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
struct rvt_qp_iter *iter;
loff_t n = *pos;
iter = rvt_qp_iter_init(s->private, 0, NULL);
/* stop calls rcu_read_unlock */
rcu_read_lock();
if (!iter)
return NULL;
do {
if (rvt_qp_iter_next(iter)) {
kfree(iter);
return NULL;
}
} while (n--);
return iter;
}
static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
loff_t *pos)
__must_hold(RCU)
{
struct rvt_qp_iter *iter = iter_ptr;
(*pos)++;
if (rvt_qp_iter_next(iter)) {
kfree(iter);
return NULL;
}
return iter;
}
static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
__releases(RCU)
{
rcu_read_unlock();
}
static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
{
struct rvt_qp_iter *iter = iter_ptr;
if (!iter)
return 0;
qp_iter_print(s, iter);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(qp_stats);
DEBUGFS_SEQ_FILE_OPEN(qp_stats)
DEBUGFS_FILE_OPS(qp_stats);
static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_ibdev *ibd;
struct hfi1_devdata *dd;
ibd = (struct hfi1_ibdev *)s->private;
dd = dd_from_dev(ibd);
if (!dd->per_sdma || *pos >= dd->num_sdma)
return NULL;
return pos;
}
static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
++*pos;
if (!dd->per_sdma || *pos >= dd->num_sdma)
return NULL;
return pos;
}
static void _sdes_seq_stop(struct seq_file *s, void *v)
{
}
static int _sdes_seq_show(struct seq_file *s, void *v)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
loff_t *spos = v;
loff_t i = *spos;
sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(sdes);
DEBUGFS_SEQ_FILE_OPEN(sdes)
DEBUGFS_FILE_OPS(sdes);
static void *_rcds_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_ibdev *ibd;
struct hfi1_devdata *dd;
ibd = (struct hfi1_ibdev *)s->private;
dd = dd_from_dev(ibd);
if (!dd->rcd || *pos >= dd->n_krcv_queues)
return NULL;
return pos;
}
static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
++*pos;
if (!dd->rcd || *pos >= dd->num_rcv_contexts)
return NULL;
return pos;
}
static void _rcds_seq_stop(struct seq_file *s, void *v)
{
}
static int _rcds_seq_show(struct seq_file *s, void *v)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct hfi1_ctxtdata *rcd;
loff_t *spos = v;
loff_t i = *spos;
rcd = hfi1_rcd_get_by_index_safe(dd, i);
if (rcd)
seqfile_dump_rcd(s, rcd);
hfi1_rcd_put(rcd);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(rcds);
DEBUGFS_SEQ_FILE_OPEN(rcds)
DEBUGFS_FILE_OPS(rcds);
static void *_pios_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_ibdev *ibd;
struct hfi1_devdata *dd;
ibd = (struct hfi1_ibdev *)s->private;
dd = dd_from_dev(ibd);
if (!dd->send_contexts || *pos >= dd->num_send_contexts)
return NULL;
return pos;
}
static void *_pios_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
++*pos;
if (!dd->send_contexts || *pos >= dd->num_send_contexts)
return NULL;
return pos;
}
static void _pios_seq_stop(struct seq_file *s, void *v)
{
}
static int _pios_seq_show(struct seq_file *s, void *v)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct send_context_info *sci;
loff_t *spos = v;
loff_t i = *spos;
unsigned long flags;
spin_lock_irqsave(&dd->sc_lock, flags);
sci = &dd->send_contexts[i];
if (sci && sci->type != SC_USER && sci->allocated && sci->sc)
seqfile_dump_sci(s, i, sci);
spin_unlock_irqrestore(&dd->sc_lock, flags);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(pios);
DEBUGFS_SEQ_FILE_OPEN(pios)
DEBUGFS_FILE_OPS(pios);
/* read the per-device counters */
static ssize_t dev_counters_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
u64 *counters;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
dd = private2dd(file);
avail = hfi1_read_cntrs(dd, NULL, &counters);
rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
return rval;
}
/* read the per-device counters */
static ssize_t dev_names_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
char *names;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
dd = private2dd(file);
avail = hfi1_read_cntrs(dd, &names, NULL);
rval = simple_read_from_buffer(buf, count, ppos, names, avail);
return rval;
}
struct counter_info {
char *name;
const struct file_operations ops;
};
/*
* Could use file_inode(file)->i_ino to figure out which file,
* instead of separate routine for each, but for now, this works...
*/
/* read the per-port names (same for each port) */
static ssize_t portnames_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
char *names;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
dd = private2dd(file);
avail = hfi1_read_portcntrs(dd->pport, &names, NULL);
rval = simple_read_from_buffer(buf, count, ppos, names, avail);
return rval;
}
/* read the per-port counters */
static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
u64 *counters;
size_t avail;
struct hfi1_pportdata *ppd;
ssize_t rval;
ppd = private2ppd(file);
avail = hfi1_read_portcntrs(ppd, NULL, &counters);
rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
return rval;
}
static void check_dyn_flag(u64 scratch0, char *p, int size, int *used,
int this_hfi, int hfi, u32 flag, const char *what)
{
u32 mask;
mask = flag << (hfi ? CR_DYN_SHIFT : 0);
if (scratch0 & mask) {
*used += scnprintf(p + *used, size - *used,
" 0x%08x - HFI%d %s in use, %s device\n",
mask, hfi, what,
this_hfi == hfi ? "this" : "other");
}
}
static ssize_t asic_flags_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd;
struct hfi1_devdata *dd;
u64 scratch0;
char *tmp;
int ret = 0;
int size;
int used;
int i;
ppd = private2ppd(file);
dd = ppd->dd;
size = PAGE_SIZE;
used = 0;
tmp = kmalloc(size, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
used += scnprintf(tmp + used, size - used,
"Resource flags: 0x%016llx\n", scratch0);
/* check permanent flag */
if (scratch0 & CR_THERM_INIT) {
used += scnprintf(tmp + used, size - used,
" 0x%08x - thermal monitoring initialized\n",
(u32)CR_THERM_INIT);
}
/* check each dynamic flag on each HFI */
for (i = 0; i < 2; i++) {
check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
CR_SBUS, "SBus");
check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
CR_EPROM, "EPROM");
check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
CR_I2C1, "i2c chain 1");
check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
CR_I2C2, "i2c chain 2");
}
used += scnprintf(tmp + used, size - used, "Write bits to clear\n");
ret = simple_read_from_buffer(buf, count, ppos, tmp, used);
kfree(tmp);
return ret;
}
static ssize_t asic_flags_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd;
struct hfi1_devdata *dd;
char *buff;
int ret;
unsigned long long value;
u64 scratch0;
u64 clear;
ppd = private2ppd(file);
dd = ppd->dd;
/* zero terminate and read the expected integer */
buff = memdup_user_nul(buf, count);
if (IS_ERR(buff))
return PTR_ERR(buff);
ret = kstrtoull(buff, 0, &value);
if (ret)
goto do_free;
clear = value;
/* obtain exclusive access */
mutex_lock(&dd->asic_data->asic_resource_mutex);
acquire_hw_mutex(dd);
scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
scratch0 &= ~clear;
write_csr(dd, ASIC_CFG_SCRATCH, scratch0);
/* force write to be visible to other HFI on another OS */
(void)read_csr(dd, ASIC_CFG_SCRATCH);
release_hw_mutex(dd);
mutex_unlock(&dd->asic_data->asic_resource_mutex);
/* return the number of bytes written */
ret = count;
do_free:
kfree(buff);
return ret;
}
/* read the dc8051 memory */
static ssize_t dc8051_memory_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd = private2ppd(file);
ssize_t rval;
void *tmp;
loff_t start, end;
/* the checks below expect the position to be positive */
if (*ppos < 0)
return -EINVAL;
tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
/*
* Fill in the requested portion of the temporary buffer from the
* 8051 memory. The 8051 memory read is done in terms of 8 bytes.
* Adjust start and end to fit. Skip reading anything if out of
* range.
*/
start = *ppos & ~0x7; /* round down */
if (start < DC8051_DATA_MEM_SIZE) {
end = (*ppos + count + 7) & ~0x7; /* round up */
if (end > DC8051_DATA_MEM_SIZE)
end = DC8051_DATA_MEM_SIZE;
rval = read_8051_data(ppd->dd, start, end - start,
(u64 *)(tmp + start));
if (rval)
goto done;
}
rval = simple_read_from_buffer(buf, count, ppos, tmp,
DC8051_DATA_MEM_SIZE);
done:
kfree(tmp);
return rval;
}
static ssize_t debugfs_lcb_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd = private2ppd(file);
struct hfi1_devdata *dd = ppd->dd;
unsigned long total, csr_off;
u64 data;
if (*ppos < 0)
return -EINVAL;
/* only read 8 byte quantities */
if ((count % 8) != 0)
return -EINVAL;
/* offset must be 8-byte aligned */
if ((*ppos % 8) != 0)
return -EINVAL;
/* do nothing if out of range or zero count */
if (*ppos >= (LCB_END - LCB_START) || !count)
return 0;
/* reduce count if needed */
if (*ppos + count > LCB_END - LCB_START)
count = (LCB_END - LCB_START) - *ppos;
csr_off = LCB_START + *ppos;
for (total = 0; total < count; total += 8, csr_off += 8) {
if (read_lcb_csr(dd, csr_off, (u64 *)&data))
break; /* failed */
if (put_user(data, (unsigned long __user *)(buf + total)))
break;
}
*ppos += total;
return total;
}
static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd = private2ppd(file);
struct hfi1_devdata *dd = ppd->dd;
unsigned long total, csr_off, data;
if (*ppos < 0)
return -EINVAL;
/* only write 8 byte quantities */
if ((count % 8) != 0)
return -EINVAL;
/* offset must be 8-byte aligned */
if ((*ppos % 8) != 0)
return -EINVAL;
/* do nothing if out of range or zero count */
if (*ppos >= (LCB_END - LCB_START) || !count)
return 0;
/* reduce count if needed */
if (*ppos + count > LCB_END - LCB_START)
count = (LCB_END - LCB_START) - *ppos;
csr_off = LCB_START + *ppos;
for (total = 0; total < count; total += 8, csr_off += 8) {
if (get_user(data, (unsigned long __user *)(buf + total)))
break;
if (write_lcb_csr(dd, csr_off, data))
break; /* failed */
}
*ppos += total;
return total;
}
/*
* read the per-port QSFP data for ppd
*/
static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd;
char *tmp;
int ret;
ppd = private2ppd(file);
tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
if (ret > 0)
ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
kfree(tmp);
return ret;
}
/* Do an i2c write operation on the chain for the given HFI. */
static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int i2c_addr;
int offset;
int total_written;
ppd = private2ppd(file);
/* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
i2c_addr = (*ppos >> 16) & 0xffff;
offset = *ppos & 0xffff;
/* explicitly reject invalid address 0 to catch cp and cat */
if (i2c_addr == 0)
return -EINVAL;
buff = memdup_user(buf, count);
if (IS_ERR(buff))
return PTR_ERR(buff);
total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
if (total_written < 0) {
ret = total_written;
goto _free;
}
*ppos += total_written;
ret = total_written;
_free:
kfree(buff);
return ret;
}
/* Do an i2c write operation on chain for HFI 0. */
static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_write(file, buf, count, ppos, 0);
}
/* Do an i2c write operation on chain for HFI 1. */
static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_write(file, buf, count, ppos, 1);
}
/* Do an i2c read operation on the chain for the given HFI. */
static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int i2c_addr;
int offset;
int total_read;
ppd = private2ppd(file);
/* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
i2c_addr = (*ppos >> 16) & 0xffff;
offset = *ppos & 0xffff;
/* explicitly reject invalid address 0 to catch cp and cat */
if (i2c_addr == 0)
return -EINVAL;
buff = kmalloc(count, GFP_KERNEL);
if (!buff)
return -ENOMEM;
total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
if (total_read < 0) {
ret = total_read;
goto _free;
}
*ppos += total_read;
ret = copy_to_user(buf, buff, total_read);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
ret = total_read;
_free:
kfree(buff);
return ret;
}
/* Do an i2c read operation on chain for HFI 0. */
static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_read(file, buf, count, ppos, 0);
}
/* Do an i2c read operation on chain for HFI 1. */
static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_read(file, buf, count, ppos, 1);
}
/* Do a QSFP write operation on the i2c chain for the given HFI. */
static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int total_written;
if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */
return -EINVAL;
ppd = private2ppd(file);
buff = memdup_user(buf, count);
if (IS_ERR(buff))
return PTR_ERR(buff);
total_written = qsfp_write(ppd, target, *ppos, buff, count);
if (total_written < 0) {
ret = total_written;
goto _free;
}
*ppos += total_written;
ret = total_written;
_free:
kfree(buff);
return ret;
}
/* Do a QSFP write operation on i2c chain for HFI 0. */
static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_write(file, buf, count, ppos, 0);
}
/* Do a QSFP write operation on i2c chain for HFI 1. */
static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_write(file, buf, count, ppos, 1);
}
/* Do a QSFP read operation on the i2c chain for the given HFI. */
static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int total_read;
if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
ret = -EINVAL;
goto _return;
}
ppd = private2ppd(file);
buff = kmalloc(count, GFP_KERNEL);
if (!buff) {
ret = -ENOMEM;
goto _return;
}
total_read = qsfp_read(ppd, target, *ppos, buff, count);
if (total_read < 0) {
ret = total_read;
goto _free;
}
*ppos += total_read;
ret = copy_to_user(buf, buff, total_read);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
ret = total_read;
_free:
kfree(buff);
_return:
return ret;
}
/* Do a QSFP read operation on i2c chain for HFI 0. */
static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_read(file, buf, count, ppos, 0);
}
/* Do a QSFP read operation on i2c chain for HFI 1. */
static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_read(file, buf, count, ppos, 1);
}
static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target)
{
struct hfi1_pportdata *ppd;
ppd = private2ppd(fp);
return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
}
static int i2c1_debugfs_open(struct inode *in, struct file *fp)
{
return __i2c_debugfs_open(in, fp, 0);
}
static int i2c2_debugfs_open(struct inode *in, struct file *fp)
{
return __i2c_debugfs_open(in, fp, 1);
}
static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target)
{
struct hfi1_pportdata *ppd;
ppd = private2ppd(fp);
release_chip_resource(ppd->dd, i2c_target(target));
return 0;
}
static int i2c1_debugfs_release(struct inode *in, struct file *fp)
{
return __i2c_debugfs_release(in, fp, 0);
}
static int i2c2_debugfs_release(struct inode *in, struct file *fp)
{
return __i2c_debugfs_release(in, fp, 1);
}
static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target)
{
struct hfi1_pportdata *ppd;
ppd = private2ppd(fp);
return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
}
static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
{
return __qsfp_debugfs_open(in, fp, 0);
}
static int qsfp2_debugfs_open(struct inode *in, struct file *fp)
{
return __qsfp_debugfs_open(in, fp, 1);
}
static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target)
{
struct hfi1_pportdata *ppd;
ppd = private2ppd(fp);
release_chip_resource(ppd->dd, i2c_target(target));
return 0;
}
static int qsfp1_debugfs_release(struct inode *in, struct file *fp)
{
return __qsfp_debugfs_release(in, fp, 0);
}
static int qsfp2_debugfs_release(struct inode *in, struct file *fp)
{
return __qsfp_debugfs_release(in, fp, 1);
}
#define EXPROM_WRITE_ENABLE BIT_ULL(14)
static bool exprom_wp_disabled;
static int exprom_wp_set(struct hfi1_devdata *dd, bool disable)
{
u64 gpio_val = 0;
if (disable) {
gpio_val = EXPROM_WRITE_ENABLE;
exprom_wp_disabled = true;
dd_dev_info(dd, "Disable Expansion ROM Write Protection\n");
} else {
exprom_wp_disabled = false;
dd_dev_info(dd, "Enable Expansion ROM Write Protection\n");
}
write_csr(dd, ASIC_GPIO_OUT, gpio_val);
write_csr(dd, ASIC_GPIO_OE, gpio_val);
return 0;
}
static ssize_t exprom_wp_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return 0;
}
static ssize_t exprom_wp_debugfs_write(struct file *file,
const char __user *buf, size_t count,
loff_t *ppos)
{
struct hfi1_pportdata *ppd = private2ppd(file);
char cdata;
if (count != 1)
return -EINVAL;
if (get_user(cdata, buf))
return -EFAULT;
if (cdata == '0')
exprom_wp_set(ppd->dd, false);
else if (cdata == '1')
exprom_wp_set(ppd->dd, true);
else
return -EINVAL;
return 1;
}
static unsigned long exprom_in_use;
static int exprom_wp_debugfs_open(struct inode *in, struct file *fp)
{
if (test_and_set_bit(0, &exprom_in_use))
return -EBUSY;
return 0;
}
static int exprom_wp_debugfs_release(struct inode *in, struct file *fp)
{
struct hfi1_pportdata *ppd = private2ppd(fp);
if (exprom_wp_disabled)
exprom_wp_set(ppd->dd, false);
clear_bit(0, &exprom_in_use);
return 0;
}
#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
{ \
.name = nm, \
.ops = { \
.owner = THIS_MODULE, \
.read = readroutine, \
.write = writeroutine, \
.llseek = generic_file_llseek, \
}, \
}
#define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \
{ \
.name = nm, \
.ops = { \
.owner = THIS_MODULE, \
.read = readf, \
.write = writef, \
.llseek = generic_file_llseek, \
.open = openf, \
.release = releasef \
}, \
}
static const struct counter_info cntr_ops[] = {
DEBUGFS_OPS("counter_names", dev_names_read, NULL),
DEBUGFS_OPS("counters", dev_counters_read, NULL),
DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
};
static const struct counter_info port_cntr_ops[] = {
DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write,
i2c1_debugfs_open, i2c1_debugfs_release),
DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write,
i2c2_debugfs_open, i2c2_debugfs_release),
DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write,
qsfp1_debugfs_open, qsfp1_debugfs_release),
DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write,
qsfp2_debugfs_open, qsfp2_debugfs_release),
DEBUGFS_XOPS("exprom_wp", exprom_wp_debugfs_read,
exprom_wp_debugfs_write, exprom_wp_debugfs_open,
exprom_wp_debugfs_release),
DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write),
DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL),
DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write),
};
static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos)
{
if (*pos >= num_online_cpus())
return NULL;
return pos;
}
static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
++*pos;
if (*pos >= num_online_cpus())
return NULL;
return pos;
}
static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v)
{
/* nothing allocated */
}
static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
loff_t *spos = v;
loff_t i = *spos;
sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list);
DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list)
DEBUGFS_FILE_OPS(sdma_cpu_list);
void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
{
char name[sizeof("port0counters") + 1];
char link[10];
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct hfi1_pportdata *ppd;
struct dentry *root;
int unit = dd->unit;
int i, j;
if (!hfi1_dbg_root)
return;
snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
snprintf(link, sizeof(link), "%d", unit);
root = debugfs_create_dir(name, hfi1_dbg_root);
ibd->hfi1_ibdev_dbg = root;
ibd->hfi1_ibdev_link =
debugfs_create_symlink(link, hfi1_dbg_root, name);
debugfs_create_file("opcode_stats", 0444, root, ibd,
&_opcode_stats_file_ops);
debugfs_create_file("tx_opcode_stats", 0444, root, ibd,
&_tx_opcode_stats_file_ops);
debugfs_create_file("ctx_stats", 0444, root, ibd, &_ctx_stats_file_ops);
debugfs_create_file("qp_stats", 0444, root, ibd, &_qp_stats_file_ops);
debugfs_create_file("sdes", 0444, root, ibd, &_sdes_file_ops);
debugfs_create_file("rcds", 0444, root, ibd, &_rcds_file_ops);
debugfs_create_file("pios", 0444, root, ibd, &_pios_file_ops);
debugfs_create_file("sdma_cpu_list", 0444, root, ibd,
&_sdma_cpu_list_file_ops);
/* dev counter files */
for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
debugfs_create_file(cntr_ops[i].name, 0444, root, dd,
&cntr_ops[i].ops);
/* per port files */
for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
snprintf(name,
sizeof(name),
port_cntr_ops[i].name,
j + 1);
debugfs_create_file(name,
!port_cntr_ops[i].ops.write ?
S_IRUGO :
S_IRUGO | S_IWUSR,
root, ppd, &port_cntr_ops[i].ops);
}
hfi1_fault_init_debugfs(ibd);
}
void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
{
if (!hfi1_dbg_root)
goto out;
hfi1_fault_exit_debugfs(ibd);
debugfs_remove(ibd->hfi1_ibdev_link);
debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
out:
ibd->hfi1_ibdev_dbg = NULL;
}
/*
* driver stats field names, one line per stat, single string. Used by
* programs like hfistats to print the stats in a way which works for
* different versions of drivers, without changing program source.
* if hfi1_ib_stats changes, this needs to change. Names need to be
* 12 chars or less (w/o newline), for proper display by hfistats utility.
*/
static const char * const hfi1_statnames[] = {
/* must be element 0*/
"KernIntr",
"ErrorIntr",
"Tx_Errs",
"Rcv_Errs",
"H/W_Errs",
"NoPIOBufs",
"CtxtsOpen",
"RcvLen_Errs",
"EgrBufFull",
"EgrHdrFull"
};
static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
{
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void *_driver_stats_names_seq_next(
struct seq_file *s,
void *v,
loff_t *pos)
{
++*pos;
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
{
}
static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
seq_printf(s, "%s\n", hfi1_statnames[*spos]);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
DEBUGFS_FILE_OPS(driver_stats_names);
static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
{
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
++*pos;
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void _driver_stats_seq_stop(struct seq_file *s, void *v)
{
}
static u64 hfi1_sps_ints(void)
{
unsigned long index, flags;
struct hfi1_devdata *dd;
u64 sps_ints = 0;
xa_lock_irqsave(&hfi1_dev_table, flags);
xa_for_each(&hfi1_dev_table, index, dd) {
sps_ints += get_all_cpu_total(dd->int_counter);
}
xa_unlock_irqrestore(&hfi1_dev_table, flags);
return sps_ints;
}
static int _driver_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
char *buffer;
u64 *stats = (u64 *)&hfi1_stats;
size_t sz = seq_get_buf(s, &buffer);
if (sz < sizeof(u64))
return SEQ_SKIP;
/* special case for interrupts */
if (*spos == 0)
*(u64 *)buffer = hfi1_sps_ints();
else
*(u64 *)buffer = stats[*spos];
seq_commit(s, sizeof(u64));
return 0;
}
DEBUGFS_SEQ_FILE_OPS(driver_stats);
DEBUGFS_SEQ_FILE_OPEN(driver_stats)
DEBUGFS_FILE_OPS(driver_stats);
void hfi1_dbg_init(void)
{
hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
debugfs_create_file("driver_stats_names", 0444, hfi1_dbg_root, NULL,
&_driver_stats_names_file_ops);
debugfs_create_file("driver_stats", 0444, hfi1_dbg_root, NULL,
&_driver_stats_file_ops);
}
void hfi1_dbg_exit(void)
{
debugfs_remove_recursive(hfi1_dbg_root);
hfi1_dbg_root = NULL;
}