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kernel/drivers/scsi/qla2xxx/qla_dfs.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic Fibre Channel HBA Driver
* Copyright (c) 2003-2014 QLogic Corporation
*/
#include "qla_def.h"
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static struct dentry *qla2x00_dfs_root;
static atomic_t qla2x00_dfs_root_count;
#define QLA_DFS_RPORT_DEVLOSS_TMO 1
static int
qla_dfs_rport_get(struct fc_port *fp, int attr_id, u64 *val)
{
switch (attr_id) {
case QLA_DFS_RPORT_DEVLOSS_TMO:
/* Only supported for FC-NVMe devices that are registered. */
if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
return -EIO;
*val = fp->nvme_remote_port->dev_loss_tmo;
break;
default:
return -EINVAL;
}
return 0;
}
static int
qla_dfs_rport_set(struct fc_port *fp, int attr_id, u64 val)
{
switch (attr_id) {
case QLA_DFS_RPORT_DEVLOSS_TMO:
/* Only supported for FC-NVMe devices that are registered. */
if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
return -EIO;
#if (IS_ENABLED(CONFIG_NVME_FC))
return nvme_fc_set_remoteport_devloss(fp->nvme_remote_port,
val);
#else /* CONFIG_NVME_FC */
return -EINVAL;
#endif /* CONFIG_NVME_FC */
default:
return -EINVAL;
}
return 0;
}
#define DEFINE_QLA_DFS_RPORT_RW_ATTR(_attr_id, _attr) \
static int qla_dfs_rport_##_attr##_get(void *data, u64 *val) \
{ \
struct fc_port *fp = data; \
return qla_dfs_rport_get(fp, _attr_id, val); \
} \
static int qla_dfs_rport_##_attr##_set(void *data, u64 val) \
{ \
struct fc_port *fp = data; \
return qla_dfs_rport_set(fp, _attr_id, val); \
} \
DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_##_attr##_fops, \
qla_dfs_rport_##_attr##_get, \
qla_dfs_rport_##_attr##_set, "%llu\n")
/*
* Wrapper for getting fc_port fields.
*
* _attr : Attribute name.
* _get_val : Accessor macro to retrieve the value.
*/
#define DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val) \
static int qla_dfs_rport_field_##_attr##_get(void *data, u64 *val) \
{ \
struct fc_port *fp = data; \
*val = _get_val; \
return 0; \
} \
DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_field_##_attr##_fops, \
qla_dfs_rport_field_##_attr##_get, \
NULL, "%llu\n")
#define DEFINE_QLA_DFS_RPORT_ACCESS(_attr, _get_val) \
DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)
#define DEFINE_QLA_DFS_RPORT_FIELD(_attr) \
DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, fp->_attr)
DEFINE_QLA_DFS_RPORT_RW_ATTR(QLA_DFS_RPORT_DEVLOSS_TMO, dev_loss_tmo);
DEFINE_QLA_DFS_RPORT_FIELD(disc_state);
DEFINE_QLA_DFS_RPORT_FIELD(scan_state);
DEFINE_QLA_DFS_RPORT_FIELD(fw_login_state);
DEFINE_QLA_DFS_RPORT_FIELD(login_pause);
DEFINE_QLA_DFS_RPORT_FIELD(flags);
DEFINE_QLA_DFS_RPORT_FIELD(nvme_flag);
DEFINE_QLA_DFS_RPORT_FIELD(last_rscn_gen);
DEFINE_QLA_DFS_RPORT_FIELD(rscn_gen);
DEFINE_QLA_DFS_RPORT_FIELD(login_gen);
DEFINE_QLA_DFS_RPORT_FIELD(loop_id);
DEFINE_QLA_DFS_RPORT_FIELD_GET(port_id, fp->d_id.b24);
DEFINE_QLA_DFS_RPORT_FIELD_GET(sess_kref, kref_read(&fp->sess_kref));
void
qla2x00_dfs_create_rport(scsi_qla_host_t *vha, struct fc_port *fp)
{
char wwn[32];
#define QLA_CREATE_RPORT_FIELD_ATTR(_attr) \
debugfs_create_file(#_attr, 0400, fp->dfs_rport_dir, \
fp, &qla_dfs_rport_field_##_attr##_fops)
if (!vha->dfs_rport_root || fp->dfs_rport_dir)
return;
sprintf(wwn, "pn-%016llx", wwn_to_u64(fp->port_name));
fp->dfs_rport_dir = debugfs_create_dir(wwn, vha->dfs_rport_root);
if (IS_ERR(fp->dfs_rport_dir))
return;
if (NVME_TARGET(vha->hw, fp))
debugfs_create_file("dev_loss_tmo", 0600, fp->dfs_rport_dir,
fp, &qla_dfs_rport_dev_loss_tmo_fops);
QLA_CREATE_RPORT_FIELD_ATTR(disc_state);
QLA_CREATE_RPORT_FIELD_ATTR(scan_state);
QLA_CREATE_RPORT_FIELD_ATTR(fw_login_state);
QLA_CREATE_RPORT_FIELD_ATTR(login_pause);
QLA_CREATE_RPORT_FIELD_ATTR(flags);
QLA_CREATE_RPORT_FIELD_ATTR(nvme_flag);
QLA_CREATE_RPORT_FIELD_ATTR(last_rscn_gen);
QLA_CREATE_RPORT_FIELD_ATTR(rscn_gen);
QLA_CREATE_RPORT_FIELD_ATTR(login_gen);
QLA_CREATE_RPORT_FIELD_ATTR(loop_id);
QLA_CREATE_RPORT_FIELD_ATTR(port_id);
QLA_CREATE_RPORT_FIELD_ATTR(sess_kref);
}
void
qla2x00_dfs_remove_rport(scsi_qla_host_t *vha, struct fc_port *fp)
{
if (!vha->dfs_rport_root || !fp->dfs_rport_dir)
return;
debugfs_remove_recursive(fp->dfs_rport_dir);
fp->dfs_rport_dir = NULL;
}
static int
qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
{
scsi_qla_host_t *vha = s->private;
struct qla_hw_data *ha = vha->hw;
unsigned long flags;
struct fc_port *sess = NULL;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
seq_printf(s, "%s\n", vha->host_str);
if (tgt) {
seq_puts(s, "Port ID Port Name Handle\n");
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
list_for_each_entry(sess, &vha->vp_fcports, list)
seq_printf(s, "%02x:%02x:%02x %8phC %d\n",
sess->d_id.b.domain, sess->d_id.b.area,
sess->d_id.b.al_pa, sess->port_name,
sess->loop_id);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_sess);
static int
qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
{
scsi_qla_host_t *vha = s->private;
struct qla_hw_data *ha = vha->hw;
struct gid_list_info *gid_list;
dma_addr_t gid_list_dma;
fc_port_t fc_port;
char *id_iter;
int rc, i;
uint16_t entries, loop_id;
seq_printf(s, "%s\n", vha->host_str);
gid_list = dma_alloc_coherent(&ha->pdev->dev,
qla2x00_gid_list_size(ha),
&gid_list_dma, GFP_KERNEL);
if (!gid_list) {
ql_dbg(ql_dbg_user, vha, 0x7018,
"DMA allocation failed for %u\n",
qla2x00_gid_list_size(ha));
return 0;
}
rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma,
&entries);
if (rc != QLA_SUCCESS)
goto out_free_id_list;
id_iter = (char *)gid_list;
seq_puts(s, "Port Name Port ID Loop ID\n");
for (i = 0; i < entries; i++) {
struct gid_list_info *gid =
(struct gid_list_info *)id_iter;
loop_id = le16_to_cpu(gid->loop_id);
memset(&fc_port, 0, sizeof(fc_port_t));
fc_port.loop_id = loop_id;
rc = qla24xx_gpdb_wait(vha, &fc_port, 0);
seq_printf(s, "%8phC %02x%02x%02x %d\n",
fc_port.port_name, fc_port.d_id.b.domain,
fc_port.d_id.b.area, fc_port.d_id.b.al_pa,
fc_port.loop_id);
id_iter += ha->gid_list_info_size;
}
out_free_id_list:
dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
gid_list, gid_list_dma);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_port_database);
static int
qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
{
struct scsi_qla_host *vha = s->private;
uint16_t mb[MAX_IOCB_MB_REG];
int rc;
struct qla_hw_data *ha = vha->hw;
u16 iocbs_used, i, exch_used;
rc = qla24xx_res_count_wait(vha, mb, SIZEOF_IOCB_MB_REG);
if (rc != QLA_SUCCESS) {
seq_printf(s, "Mailbox Command failed %d, mb %#x", rc, mb[0]);
} else {
seq_puts(s, "FW Resource count\n\n");
seq_printf(s, "Original TGT exchg count[%d]\n", mb[1]);
seq_printf(s, "Current TGT exchg count[%d]\n", mb[2]);
seq_printf(s, "Current Initiator Exchange count[%d]\n", mb[3]);
seq_printf(s, "Original Initiator Exchange count[%d]\n", mb[6]);
seq_printf(s, "Current IOCB count[%d]\n", mb[7]);
seq_printf(s, "Original IOCB count[%d]\n", mb[10]);
seq_printf(s, "MAX VP count[%d]\n", mb[11]);
seq_printf(s, "MAX FCF count[%d]\n", mb[12]);
seq_printf(s, "Current free pageable XCB buffer cnt[%d]\n",
mb[20]);
seq_printf(s, "Original Initiator fast XCB buffer cnt[%d]\n",
mb[21]);
seq_printf(s, "Current free Initiator fast XCB buffer cnt[%d]\n",
mb[22]);
seq_printf(s, "Original Target fast XCB buffer cnt[%d]\n",
mb[23]);
}
if (ql2xenforce_iocb_limit) {
/* lock is not require. It's an estimate. */
iocbs_used = ha->base_qpair->fwres.iocbs_used;
exch_used = ha->base_qpair->fwres.exch_used;
for (i = 0; i < ha->max_qpairs; i++) {
if (ha->queue_pair_map[i]) {
iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
exch_used += ha->queue_pair_map[i]->fwres.exch_used;
}
}
seq_printf(s, "Driver: estimate iocb used [%d] high water limit [%d]\n",
iocbs_used, ha->base_qpair->fwres.iocbs_limit);
seq_printf(s, "estimate exchange used[%d] high water limit [%d]\n",
exch_used, ha->base_qpair->fwres.exch_limit);
if (ql2xenforce_iocb_limit == 2) {
iocbs_used = atomic_read(&ha->fwres.iocb_used);
exch_used = atomic_read(&ha->fwres.exch_used);
seq_printf(s, " estimate iocb2 used [%d] high water limit [%d]\n",
iocbs_used, ha->fwres.iocb_limit);
seq_printf(s, " estimate exchange2 used[%d] high water limit [%d] \n",
exch_used, ha->fwres.exch_limit);
}
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
static int
qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
{
struct scsi_qla_host *vha = s->private;
struct qla_qpair *qpair = vha->hw->base_qpair;
uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
u16 i;
fc_port_t *fcport = NULL;
if (qla2x00_chip_is_down(vha))
return 0;
qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
for (i = 0; i < vha->hw->max_qpairs; i++) {
qpair = vha->hw->queue_pair_map[i];
if (!qpair)
continue;
qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
qla_core_ret_sta_ctio +=
qpair->tgt_counters.qla_core_ret_sta_ctio;
core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
num_alloc_iocb_failed +=
qpair->tgt_counters.num_alloc_iocb_failed;
num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
}
seq_puts(s, "Target Counters\n");
seq_printf(s, "qla_core_sbt_cmd = %lld\n",
qla_core_sbt_cmd);
seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
qla_core_ret_sta_ctio);
seq_printf(s, "qla_core_ret_ctio = %lld\n",
qla_core_ret_ctio);
seq_printf(s, "core_qla_que_buf = %lld\n",
core_qla_que_buf);
seq_printf(s, "core_qla_snd_status = %lld\n",
core_qla_snd_status);
seq_printf(s, "core_qla_free_cmd = %lld\n",
core_qla_free_cmd);
seq_printf(s, "num alloc iocb failed = %lld\n",
num_alloc_iocb_failed);
seq_printf(s, "num term exchange sent = %lld\n",
num_term_xchg_sent);
seq_printf(s, "num Q full sent = %lld\n",
num_q_full_sent);
/* DIF stats */
seq_printf(s, "DIF Inp Bytes = %lld\n",
vha->qla_stats.qla_dif_stats.dif_input_bytes);
seq_printf(s, "DIF Outp Bytes = %lld\n",
vha->qla_stats.qla_dif_stats.dif_output_bytes);
seq_printf(s, "DIF Inp Req = %lld\n",
vha->qla_stats.qla_dif_stats.dif_input_requests);
seq_printf(s, "DIF Outp Req = %lld\n",
vha->qla_stats.qla_dif_stats.dif_output_requests);
seq_printf(s, "DIF Guard err = %d\n",
vha->qla_stats.qla_dif_stats.dif_guard_err);
seq_printf(s, "DIF Ref tag err = %d\n",
vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
seq_printf(s, "DIF App tag err = %d\n",
vha->qla_stats.qla_dif_stats.dif_app_tag_err);
seq_puts(s, "\n");
seq_puts(s, "Initiator Error Counters\n");
seq_printf(s, "HW Error Count = %14lld\n",
vha->hw_err_cnt);
seq_printf(s, "Link Down Count = %14lld\n",
vha->short_link_down_cnt);
seq_printf(s, "Interface Err Count = %14lld\n",
vha->interface_err_cnt);
seq_printf(s, "Cmd Timeout Count = %14lld\n",
vha->cmd_timeout_cnt);
seq_printf(s, "Reset Count = %14lld\n",
vha->reset_cmd_err_cnt);
seq_puts(s, "\n");
list_for_each_entry(fcport, &vha->vp_fcports, list) {
if (!fcport->rport)
continue;
seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
fcport->rport->number, fcport->tgt_short_link_down_cnt);
}
seq_puts(s, "\n");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
static int
qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
{
scsi_qla_host_t *vha = s->private;
uint32_t cnt;
uint32_t *fce;
uint64_t fce_start;
struct qla_hw_data *ha = vha->hw;
mutex_lock(&ha->fce_mutex);
seq_puts(s, "FCE Trace Buffer\n");
seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
seq_puts(s, "FCE Enable Registers\n");
seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
ha->fce_mb[5], ha->fce_mb[6]);
fce = (uint32_t *) ha->fce;
fce_start = (unsigned long long) ha->fce_dma;
for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
if (cnt % 8 == 0)
seq_printf(s, "\n%llx: ",
(unsigned long long)((cnt * 4) + fce_start));
else
seq_putc(s, ' ');
seq_printf(s, "%08x", *fce++);
}
seq_puts(s, "\nEnd\n");
mutex_unlock(&ha->fce_mutex);
return 0;
}
static int
qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
{
scsi_qla_host_t *vha = inode->i_private;
struct qla_hw_data *ha = vha->hw;
int rval;
if (!ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Pause tracing to flush FCE buffers. */
rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
if (rval)
ql_dbg(ql_dbg_user, vha, 0x705c,
"DebugFS: Unable to disable FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
mutex_unlock(&ha->fce_mutex);
out:
return single_open(file, qla2x00_dfs_fce_show, vha);
}
static int
qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
{
scsi_qla_host_t *vha = inode->i_private;
struct qla_hw_data *ha = vha->hw;
int rval;
if (ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Re-enable FCE tracing. */
ha->flags.fce_enabled = 1;
memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
ha->fce_mb, &ha->fce_bufs);
if (rval) {
ql_dbg(ql_dbg_user, vha, 0x700d,
"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
}
mutex_unlock(&ha->fce_mutex);
out:
return single_release(inode, file);
}
static const struct file_operations dfs_fce_ops = {
.open = qla2x00_dfs_fce_open,
.read = seq_read,
.llseek = seq_lseek,
.release = qla2x00_dfs_fce_release,
};
static int
qla_dfs_naqp_show(struct seq_file *s, void *unused)
{
struct scsi_qla_host *vha = s->private;
struct qla_hw_data *ha = vha->hw;
seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
return 0;
}
/*
* Helper macros for setting up debugfs entries.
* _name: The name of the debugfs entry
* _ctx_struct: The context that was passed when creating the debugfs file
*
* QLA_DFS_SETUP_RD could be used when there is only a show function.
* - show function take the name qla_dfs_<sysfs-name>_show
*
* QLA_DFS_SETUP_RW could be used when there are both show and write functions.
* - show function take the name qla_dfs_<sysfs-name>_show
* - write function take the name qla_dfs_<sysfs-name>_write
*
* To have a new debugfs entry, do:
* 1. Create a "struct dentry *" in the appropriate structure in the format
* dfs_<sysfs-name>
* 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW
* 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE
* or QLA_DFS_ROOT_CREATE_FILE
* 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE
* or QLA_DFS_ROOT_REMOVE_FILE
*
* Example for creating "TEST" sysfs file:
* 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
* 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t);
* 3. In qla2x00_dfs_setup():
* QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
* 4. In qla2x00_dfs_remove():
* QLA_DFS_REMOVE_FILE(ha, TEST);
*/
#define QLA_DFS_SETUP_RD(_name, _ctx_struct) \
static int \
qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
{ \
_ctx_struct *__ctx = inode->i_private; \
\
return single_open(file, qla_dfs_##_name##_show, __ctx); \
} \
\
static const struct file_operations qla_dfs_##_name##_ops = { \
.open = qla_dfs_##_name##_open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
};
#define QLA_DFS_SETUP_RW(_name, _ctx_struct) \
static int \
qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
{ \
_ctx_struct *__ctx = inode->i_private; \
\
return single_open(file, qla_dfs_##_name##_show, __ctx); \
} \
\
static const struct file_operations qla_dfs_##_name##_ops = { \
.open = qla_dfs_##_name##_open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
.write = qla_dfs_##_name##_write, \
};
#define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx) \
do { \
if (!qla_dfs_##_name) \
qla_dfs_##_name = debugfs_create_file(#_name, \
_perm, qla2x00_dfs_root, _ctx, \
&qla_dfs_##_name##_ops); \
} while (0)
#define QLA_DFS_ROOT_REMOVE_FILE(_name) \
do { \
if (qla_dfs_##_name) { \
debugfs_remove(qla_dfs_##_name); \
qla_dfs_##_name = NULL; \
} \
} while (0)
#define QLA_DFS_CREATE_FILE(_struct, _name, _perm, _parent, _ctx) \
do { \
(_struct)->dfs_##_name = debugfs_create_file(#_name, \
_perm, _parent, _ctx, \
&qla_dfs_##_name##_ops) \
} while (0)
#define QLA_DFS_REMOVE_FILE(_struct, _name) \
do { \
if ((_struct)->dfs_##_name) { \
debugfs_remove((_struct)->dfs_##_name); \
(_struct)->dfs_##_name = NULL; \
} \
} while (0)
static int
qla_dfs_naqp_open(struct inode *inode, struct file *file)
{
struct scsi_qla_host *vha = inode->i_private;
return single_open(file, qla_dfs_naqp_show, vha);
}
static ssize_t
qla_dfs_naqp_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
struct seq_file *s = file->private_data;
struct scsi_qla_host *vha = s->private;
struct qla_hw_data *ha = vha->hw;
char *buf;
int rc = 0;
unsigned long num_act_qp;
if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
pr_err("host%ld: this adapter does not support Multi Q.",
vha->host_no);
return -EINVAL;
}
if (!vha->flags.qpairs_available) {
pr_err("host%ld: Driver is not setup with Multi Q.",
vha->host_no);
return -EINVAL;
}
buf = memdup_user_nul(buffer, count);
if (IS_ERR(buf)) {
pr_err("host%ld: fail to copy user buffer.",
vha->host_no);
return PTR_ERR(buf);
}
num_act_qp = simple_strtoul(buf, NULL, 0);
if (num_act_qp >= vha->hw->max_qpairs) {
pr_err("User set invalid number of qpairs %lu. Max = %d",
num_act_qp, vha->hw->max_qpairs);
rc = -EINVAL;
goto out_free;
}
if (num_act_qp != ha->tgt.num_act_qpairs) {
ha->tgt.num_act_qpairs = num_act_qp;
qlt_clr_qp_table(vha);
}
rc = count;
out_free:
kfree(buf);
return rc;
}
static const struct file_operations dfs_naqp_ops = {
.open = qla_dfs_naqp_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = qla_dfs_naqp_write,
};
int
qla2x00_dfs_setup(scsi_qla_host_t *vha)
{
struct qla_hw_data *ha = vha->hw;
if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
!IS_QLA27XX(ha) && !IS_QLA28XX(ha))
goto out;
if (!ha->fce)
goto out;
if (qla2x00_dfs_root)
goto create_dir;
atomic_set(&qla2x00_dfs_root_count, 0);
qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
create_dir:
if (ha->dfs_dir)
goto create_nodes;
mutex_init(&ha->fce_mutex);
ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
atomic_inc(&qla2x00_dfs_root_count);
create_nodes:
ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
&dfs_fce_ops);
ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
ha->tgt.dfs_naqp = debugfs_create_file("naqp",
0400, ha->dfs_dir, vha, &dfs_naqp_ops);
if (IS_ERR(ha->tgt.dfs_naqp)) {
ql_log(ql_log_warn, vha, 0xd011,
"Unable to create debugFS naqp node.\n");
goto out;
}
}
vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
if (IS_ERR(vha->dfs_rport_root)) {
ql_log(ql_log_warn, vha, 0xd012,
"Unable to create debugFS rports node.\n");
goto out;
}
out:
return 0;
}
int
qla2x00_dfs_remove(scsi_qla_host_t *vha)
{
struct qla_hw_data *ha = vha->hw;
if (ha->tgt.dfs_naqp) {
debugfs_remove(ha->tgt.dfs_naqp);
ha->tgt.dfs_naqp = NULL;
}
if (ha->tgt.dfs_tgt_sess) {
debugfs_remove(ha->tgt.dfs_tgt_sess);
ha->tgt.dfs_tgt_sess = NULL;
}
if (ha->tgt.dfs_tgt_port_database) {
debugfs_remove(ha->tgt.dfs_tgt_port_database);
ha->tgt.dfs_tgt_port_database = NULL;
}
if (ha->dfs_fw_resource_cnt) {
debugfs_remove(ha->dfs_fw_resource_cnt);
ha->dfs_fw_resource_cnt = NULL;
}
if (ha->dfs_tgt_counters) {
debugfs_remove(ha->dfs_tgt_counters);
ha->dfs_tgt_counters = NULL;
}
if (ha->dfs_fce) {
debugfs_remove(ha->dfs_fce);
ha->dfs_fce = NULL;
}
if (vha->dfs_rport_root) {
debugfs_remove_recursive(vha->dfs_rport_root);
vha->dfs_rport_root = NULL;
}
if (ha->dfs_dir) {
debugfs_remove(ha->dfs_dir);
ha->dfs_dir = NULL;
atomic_dec(&qla2x00_dfs_root_count);
}
if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
qla2x00_dfs_root) {
debugfs_remove(qla2x00_dfs_root);
qla2x00_dfs_root = NULL;
}
return 0;
}
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