/*
* Copyright ( c ) 2012 Mellanox Technologies . 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
* OpenIB . org 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 .
*/
/***********************************************************/
/*This file support the handling of the Alias GUID feature. */
/***********************************************************/
#include <rdma/ib_mad.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_sa.h>
#include <rdma/ib_pack.h>
#include <linux/mlx4/cmd.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <rdma/ib_user_verbs.h>
#include <linux/delay.h>
#include "mlx4_ib.h"
/*
The driver keeps the current state of all guids , as they are in the HW .
Whenever we receive an smp mad GUIDInfo record , the data will be cached .
*/
struct mlx4_alias_guid_work_context {
u8 port;
struct mlx4_ib_dev *dev ;
struct ib_sa_query *sa_query;
struct completion done;
int query_id;
struct list_head list;
int block_num;
ib_sa_comp_mask guid_indexes;
u8 method;
};
struct mlx4_next_alias_guid_work {
u8 port;
u8 block_num;
u8 method;
struct mlx4_sriov_alias_guid_info_rec_det rec_det;
};
static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port,
int *resched_delay_sec);
void mlx4_ib_update_cache_on_guid_change(struct mlx4_ib_dev *dev, int block_num,
u32 port_num, u8 *p_data)
{
int i;
u64 guid_indexes;
int slave_id;
u32 port_index = port_num - 1 ;
if (!mlx4_is_master(dev->dev))
return ;
guid_indexes = be64_to_cpu((__force __be64) dev->sriov.alias_guid.
ports_guid[port_num - 1 ].
all_rec_per_port[block_num].guid_indexes);
pr_debug("port: %u, guid_indexes: 0x%llx\n" , port_num, guid_indexes);
for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
/* The location of the specific index starts from bit number 4
* until bit num 11 */
if (test_bit(i + 4 , (unsigned long *)&guid_indexes)) {
slave_id = (block_num * NUM_ALIAS_GUID_IN_REC) + i ;
if (slave_id >= dev->dev->num_slaves) {
pr_debug("The last slave: %d\n" , slave_id);
return ;
}
/* cache the guid: */
memcpy(&dev->sriov.demux[port_index].guid_cache[slave_id],
&p_data[i * GUID_REC_SIZE],
GUID_REC_SIZE);
} else
pr_debug("Guid number: %d in block: %d"
" was not updated\n" , i, block_num);
}
}
static __be64 get_cached_alias_guid(struct mlx4_ib_dev *dev, int port, int index)
{
if (index >= NUM_ALIAS_GUID_PER_PORT) {
pr_err("%s: ERROR: asked for index:%d\n" , __func__, index);
return (__force __be64) -1 ;
}
return *(__be64 *)&dev->sriov.demux[port - 1 ].guid_cache[index];
}
ib_sa_comp_mask mlx4_ib_get_aguid_comp_mask_from_ix(int index)
{
return IB_SA_COMP_MASK(4 + index);
}
void mlx4_ib_slave_alias_guid_event(struct mlx4_ib_dev *dev, int slave,
int port, int slave_init)
{
__be64 curr_guid, required_guid;
int record_num = slave / 8 ;
int index = slave % 8 ;
int port_index = port - 1 ;
unsigned long flags;
int do_work = 0 ;
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
if (dev->sriov.alias_guid.ports_guid[port_index].state_flags &
GUID_STATE_NEED_PORT_INIT)
goto unlock;
if (!slave_init) {
curr_guid = *(__be64 *)&dev->sriov.
alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
all_recs[GUID_REC_SIZE * index];
if (curr_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL) ||
!curr_guid)
goto unlock;
required_guid = cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL);
} else {
required_guid = mlx4_get_admin_guid(dev->dev, slave, port);
if (required_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
goto unlock;
}
*(__be64 *)&dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
all_recs[GUID_REC_SIZE * index] = required_guid;
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].guid_indexes
|= mlx4_ib_get_aguid_comp_mask_from_ix(index);
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].status
= MLX4_GUID_INFO_STATUS_IDLE;
/* set to run immediately */
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].time_to_run = 0 ;
dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[record_num].
guids_retry_schedule[index] = 0 ;
do_work = 1 ;
unlock:
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
if (do_work)
mlx4_ib_init_alias_guid_work(dev, port_index);
}
/*
* Whenever new GUID is set / unset ( guid table change ) create event and
* notify the relevant slave ( master also should be notified ) .
* If the GUID value is not as we have in the cache the slave will not be
* updated ; in this case it waits for the smp_snoop or the port management
* event to call the function and to update the slave .
* block_number - the index of the block ( 16 blocks available )
* port_number - 1 or 2
*/
void mlx4_ib_notify_slaves_on_guid_change(struct mlx4_ib_dev *dev,
int block_num, u32 port_num,
u8 *p_data)
{
int i;
u64 guid_indexes;
int slave_id, slave_port;
enum slave_port_state new_state;
enum slave_port_state prev_state;
__be64 tmp_cur_ag, form_cache_ag;
enum slave_port_gen_event gen_event;
struct mlx4_sriov_alias_guid_info_rec_det *rec;
unsigned long flags;
__be64 required_value;
if (!mlx4_is_master(dev->dev))
return ;
rec = &dev->sriov.alias_guid.ports_guid[port_num - 1 ].
all_rec_per_port[block_num];
guid_indexes = be64_to_cpu((__force __be64) dev->sriov.alias_guid.
ports_guid[port_num - 1 ].
all_rec_per_port[block_num].guid_indexes);
pr_debug("port: %u, guid_indexes: 0x%llx\n" , port_num, guid_indexes);
/*calculate the slaves and notify them*/
for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
/* the location of the specific index runs from bits 4..11 */
if (!(test_bit(i + 4 , (unsigned long *)&guid_indexes)))
continue ;
slave_id = (block_num * NUM_ALIAS_GUID_IN_REC) + i ;
if (slave_id >= dev->dev->persist->num_vfs + 1 )
return ;
slave_port = mlx4_phys_to_slave_port(dev->dev, slave_id, port_num);
if (slave_port < 0 ) /* this port isn't available for the VF */
continue ;
tmp_cur_ag = *(__be64 *)&p_data[i * GUID_REC_SIZE];
form_cache_ag = get_cached_alias_guid(dev, port_num,
(NUM_ALIAS_GUID_IN_REC * block_num) + i);
/*
* Check if guid is not the same as in the cache ,
* If it is different , wait for the snoop_smp or the port mgmt
* change event to update the slave on its port state change
*/
if (tmp_cur_ag != form_cache_ag)
continue ;
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
required_value = *(__be64 *)&rec->all_recs[i * GUID_REC_SIZE];
if (required_value == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
required_value = 0 ;
if (tmp_cur_ag == required_value) {
rec->guid_indexes = rec->guid_indexes &
~mlx4_ib_get_aguid_comp_mask_from_ix(i);
} else {
/* may notify port down if value is 0 */
if (tmp_cur_ag != MLX4_NOT_SET_GUID) {
spin_unlock_irqrestore(&dev->sriov.
alias_guid.ag_work_lock, flags);
continue ;
}
}
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock,
flags);
mlx4_gen_guid_change_eqe(dev->dev, slave_id, port_num);
/*2 cases: Valid GUID, and Invalid Guid*/
if (tmp_cur_ag != MLX4_NOT_SET_GUID) { /*valid GUID*/
prev_state = mlx4_get_slave_port_state(dev->dev, slave_id, port_num);
new_state = set_and_calc_slave_port_state(dev->dev, slave_id, port_num,
MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID,
&gen_event);
pr_debug("slave: %d, port: %u prev_port_state: %d,"
" new_port_state: %d, gen_event: %d\n" ,
slave_id, port_num, prev_state, new_state, gen_event);
if (gen_event == SLAVE_PORT_GEN_EVENT_UP) {
pr_debug("sending PORT_UP event to slave: %d, port: %u\n" ,
slave_id, port_num);
mlx4_gen_port_state_change_eqe(dev->dev, slave_id,
port_num, MLX4_PORT_CHANGE_SUBTYPE_ACTIVE);
}
} else { /* request to invalidate GUID */
set_and_calc_slave_port_state(dev->dev, slave_id, port_num,
MLX4_PORT_STATE_IB_EVENT_GID_INVALID,
&gen_event);
if (gen_event == SLAVE_PORT_GEN_EVENT_DOWN) {
pr_debug("sending PORT DOWN event to slave: %d, port: %u\n" ,
slave_id, port_num);
mlx4_gen_port_state_change_eqe(dev->dev,
slave_id,
port_num,
MLX4_PORT_CHANGE_SUBTYPE_DOWN);
}
}
}
}
static void aliasguid_query_handler(int status,
struct ib_sa_guidinfo_rec *guid_rec,
void *context)
{
struct mlx4_ib_dev *dev;
struct mlx4_alias_guid_work_context *cb_ctx = context;
u8 port_index ;
int i;
struct mlx4_sriov_alias_guid_info_rec_det *rec;
unsigned long flags, flags1;
ib_sa_comp_mask declined_guid_indexes = 0 ;
ib_sa_comp_mask applied_guid_indexes = 0 ;
unsigned int resched_delay_sec = 0 ;
if (!context)
return ;
dev = cb_ctx->dev;
port_index = cb_ctx->port - 1 ;
rec = &dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[cb_ctx->block_num];
if (status) {
pr_debug("(port: %d) failed: status = %d\n" ,
cb_ctx->port, status);
rec->time_to_run = ktime_get_boottime_ns() + 1 * NSEC_PER_SEC;
goto out;
}
if (guid_rec->block_num != cb_ctx->block_num) {
pr_err("block num mismatch: %d != %d\n" ,
cb_ctx->block_num, guid_rec->block_num);
goto out;
}
pr_debug("lid/port: %d/%d, block_num: %d\n" ,
be16_to_cpu(guid_rec->lid), cb_ctx->port,
guid_rec->block_num);
rec = &dev->sriov.alias_guid.ports_guid[port_index].
all_rec_per_port[guid_rec->block_num];
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
__be64 sm_response, required_val;
if (!(cb_ctx->guid_indexes &
mlx4_ib_get_aguid_comp_mask_from_ix(i)))
continue ;
sm_response = *(__be64 *)&guid_rec->guid_info_list
[i * GUID_REC_SIZE];
required_val = *(__be64 *)&rec->all_recs[i * GUID_REC_SIZE];
if (cb_ctx->method == MLX4_GUID_INFO_RECORD_DELETE) {
if (required_val ==
cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
goto next_entry;
/* A new value was set till we got the response */
pr_debug("need to set new value %llx, record num %d, block_num:%d\n" ,
be64_to_cpu(required_val),
i, guid_rec->block_num);
goto entry_declined;
}
/* check if the SM didn't assign one of the records.
* if it didn ' t , re - ask for .
*/
if (sm_response == MLX4_NOT_SET_GUID) {
if (rec->guids_retry_schedule[i] == 0 )
mlx4_ib_warn(&dev->ib_dev,
"%s:Record num %d in block_num: %d was declined by SM\n" ,
__func__, i,
guid_rec->block_num);
goto entry_declined;
} else {
/* properly assigned record. */
/* We save the GUID we just got from the SM in the
* admin_guid in order to be persistent , and in the
* request from the sm the process will ask for the same GUID */
if (required_val &&
sm_response != required_val) {
/* Warn only on first retry */
if (rec->guids_retry_schedule[i] == 0 )
mlx4_ib_warn(&dev->ib_dev, "%s: Failed to set"
" admin guid after SysAdmin "
"configuration. "
"Record num %d in block_num:%d "
"was declined by SM, "
"new val(0x%llx) was kept, SM returned (0x%llx)\n" ,
__func__, i,
guid_rec->block_num,
be64_to_cpu(required_val),
be64_to_cpu(sm_response));
goto entry_declined;
} else {
*(__be64 *)&rec->all_recs[i * GUID_REC_SIZE] =
sm_response;
if (required_val == 0 )
mlx4_set_admin_guid(dev->dev,
sm_response,
(guid_rec->block_num
* NUM_ALIAS_GUID_IN_REC) + i,
cb_ctx->port);
goto next_entry;
}
}
entry_declined:
declined_guid_indexes |= mlx4_ib_get_aguid_comp_mask_from_ix(i);
rec->guids_retry_schedule[i] =
(rec->guids_retry_schedule[i] == 0 ) ? 1 :
min((unsigned int )60 ,
rec->guids_retry_schedule[i] * 2 );
/* using the minimum value among all entries in that record */
resched_delay_sec = (resched_delay_sec == 0 ) ?
rec->guids_retry_schedule[i] :
min(resched_delay_sec,
rec->guids_retry_schedule[i]);
continue ;
next_entry:
rec->guids_retry_schedule[i] = 0 ;
}
applied_guid_indexes = cb_ctx->guid_indexes & ~declined_guid_indexes;
if (declined_guid_indexes ||
rec->guid_indexes & ~(applied_guid_indexes)) {
pr_debug("record=%d wasn't fully set, guid_indexes=0x%llx applied_indexes=0x%llx, declined_indexes=0x%llx\n" ,
guid_rec->block_num,
be64_to_cpu((__force __be64)rec->guid_indexes),
be64_to_cpu((__force __be64)applied_guid_indexes),
be64_to_cpu((__force __be64)declined_guid_indexes));
rec->time_to_run = ktime_get_boottime_ns() +
resched_delay_sec * NSEC_PER_SEC;
} else {
rec->status = MLX4_GUID_INFO_STATUS_SET;
}
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
/*
The func is call here to close the cases when the
sm doesn ' t send smp , so in the sa response the driver
notifies the slave .
*/
mlx4_ib_notify_slaves_on_guid_change(dev, guid_rec->block_num,
cb_ctx->port,
guid_rec->guid_info_list);
out:
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
if (!dev->sriov.is_going_down) {
get_low_record_time_index(dev, port_index, &resched_delay_sec);
queue_delayed_work(dev->sriov.alias_guid.ports_guid[port_index].wq,
&dev->sriov.alias_guid.ports_guid[port_index].
alias_guid_work,
msecs_to_jiffies(resched_delay_sec * 1000 ));
}
if (cb_ctx->sa_query) {
list_del(&cb_ctx->list);
kfree(cb_ctx);
} else
complete(&cb_ctx->done);
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
}
static void invalidate_guid_record(struct mlx4_ib_dev *dev, u8 port, int index)
{
int i;
u64 cur_admin_val;
ib_sa_comp_mask comp_mask = 0 ;
dev->sriov.alias_guid.ports_guid[port - 1 ].all_rec_per_port[index].status
= MLX4_GUID_INFO_STATUS_SET;
/* calculate the comp_mask for that record.*/
for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
cur_admin_val =
*(u64 *)&dev->sriov.alias_guid.ports_guid[port - 1 ].
all_rec_per_port[index].all_recs[GUID_REC_SIZE * i];
/*
check the admin value : if it ' s for delete ( ~ 00 LL ) or
it is the first guid of the first record ( hw guid ) or
the records is not in ownership of the sysadmin and the sm doesn ' t
need to assign GUIDs , then don ' t put it up for assignment .
*/
if (MLX4_GUID_FOR_DELETE_VAL == cur_admin_val ||
(!index && !i))
continue ;
comp_mask |= mlx4_ib_get_aguid_comp_mask_from_ix(i);
}
dev->sriov.alias_guid.ports_guid[port - 1 ].
all_rec_per_port[index].guid_indexes |= comp_mask;
if (dev->sriov.alias_guid.ports_guid[port - 1 ].
all_rec_per_port[index].guid_indexes)
dev->sriov.alias_guid.ports_guid[port - 1 ].
all_rec_per_port[index].status = MLX4_GUID_INFO_STATUS_IDLE;
}
static int set_guid_rec(struct ib_device *ibdev,
struct mlx4_next_alias_guid_work *rec)
{
int err;
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct ib_sa_guidinfo_rec guid_info_rec;
ib_sa_comp_mask comp_mask;
struct ib_port_attr attr;
struct mlx4_alias_guid_work_context *callback_context;
unsigned long resched_delay, flags, flags1;
u8 port = rec->port + 1 ;
int index = rec->block_num;
struct mlx4_sriov_alias_guid_info_rec_det *rec_det = &rec->rec_det;
struct list_head *head =
&dev->sriov.alias_guid.ports_guid[port - 1 ].cb_list;
memset(&attr, 0 , sizeof (attr));
err = __mlx4_ib_query_port(ibdev, port, &attr, 1 );
if (err) {
pr_debug("mlx4_ib_query_port failed (err: %d), port: %d\n" ,
err, port);
return err;
}
/*check the port was configured by the sm, otherwise no need to send */
if (attr.state != IB_PORT_ACTIVE) {
pr_debug("port %d not active...rescheduling\n" , port);
resched_delay = 5 * HZ;
err = -EAGAIN;
goto new_schedule;
}
callback_context = kmalloc(sizeof *callback_context, GFP_KERNEL);
if (!callback_context) {
err = -ENOMEM;
resched_delay = HZ * 5 ;
goto new_schedule;
}
callback_context->port = port;
callback_context->dev = dev;
callback_context->block_num = index;
callback_context->guid_indexes = rec_det->guid_indexes;
callback_context->method = rec->method;
memset(&guid_info_rec, 0 , sizeof (struct ib_sa_guidinfo_rec));
guid_info_rec.lid = ib_lid_be16(attr.lid);
guid_info_rec.block_num = index;
memcpy(guid_info_rec.guid_info_list, rec_det->all_recs,
GUID_REC_SIZE * NUM_ALIAS_GUID_IN_REC);
comp_mask = IB_SA_GUIDINFO_REC_LID | IB_SA_GUIDINFO_REC_BLOCK_NUM |
rec_det->guid_indexes;
init_completion(&callback_context->done);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
list_add_tail(&callback_context->list, head);
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
callback_context->query_id =
ib_sa_guid_info_rec_query(dev->sriov.alias_guid.sa_client,
ibdev, port, &guid_info_rec,
comp_mask, rec->method, 1000 ,
GFP_KERNEL, aliasguid_query_handler,
callback_context,
&callback_context->sa_query);
if (callback_context->query_id < 0 ) {
pr_debug("ib_sa_guid_info_rec_query failed, query_id: "
"%d. will reschedule to the next 1 sec.\n" ,
callback_context->query_id);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
list_del(&callback_context->list);
kfree(callback_context);
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
resched_delay = 1 * HZ;
err = -EAGAIN;
goto new_schedule;
}
err = 0 ;
goto out;
new_schedule:
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
invalidate_guid_record(dev, port, index);
if (!dev->sriov.is_going_down) {
queue_delayed_work(dev->sriov.alias_guid.ports_guid[port - 1 ].wq,
&dev->sriov.alias_guid.ports_guid[port - 1 ].alias_guid_work,
resched_delay);
}
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
out:
return err;
}
static void mlx4_ib_guid_port_init(struct mlx4_ib_dev *dev, int port)
{
int j, k, entry;
__be64 guid;
/*Check if the SM doesn't need to assign the GUIDs*/
for (j = 0 ; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
for (k = 0 ; k < NUM_ALIAS_GUID_IN_REC; k++) {
entry = j * NUM_ALIAS_GUID_IN_REC + k;
/* no request for the 0 entry (hw guid) */
if (!entry || entry > dev->dev->persist->num_vfs ||
!mlx4_is_slave_active(dev->dev, entry))
continue ;
guid = mlx4_get_admin_guid(dev->dev, entry, port);
*(__be64 *)&dev->sriov.alias_guid.ports_guid[port - 1 ].
all_rec_per_port[j].all_recs
[GUID_REC_SIZE * k] = guid;
pr_debug("guid was set, entry=%d, val=0x%llx, port=%d\n" ,
entry,
be64_to_cpu(guid),
port);
}
}
}
void mlx4_ib_invalidate_all_guid_record(struct mlx4_ib_dev *dev, int port)
{
int i;
unsigned long flags, flags1;
pr_debug("port %d\n" , port);
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
if (dev->sriov.alias_guid.ports_guid[port - 1 ].state_flags &
GUID_STATE_NEED_PORT_INIT) {
mlx4_ib_guid_port_init(dev, port);
dev->sriov.alias_guid.ports_guid[port - 1 ].state_flags &=
(~GUID_STATE_NEED_PORT_INIT);
}
for (i = 0 ; i < NUM_ALIAS_GUID_REC_IN_PORT; i++)
invalidate_guid_record(dev, port, i);
if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) {
/*
make sure no work waits in the queue , if the work is already
queued ( not on the timer ) the cancel will fail . That is not a problem
because we just want the work started .
*/
cancel_delayed_work(&dev->sriov.alias_guid.
ports_guid[port - 1 ].alias_guid_work);
queue_delayed_work(dev->sriov.alias_guid.ports_guid[port - 1 ].wq,
&dev->sriov.alias_guid.ports_guid[port - 1 ].alias_guid_work,
0 );
}
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
}
static void set_required_record(struct mlx4_ib_dev *dev, u8 port,
struct mlx4_next_alias_guid_work *next_rec,
int record_index)
{
int i;
int lowset_time_entry = -1 ;
int lowest_time = 0 ;
ib_sa_comp_mask delete_guid_indexes = 0 ;
ib_sa_comp_mask set_guid_indexes = 0 ;
struct mlx4_sriov_alias_guid_info_rec_det *rec =
&dev->sriov.alias_guid.ports_guid[port].
all_rec_per_port[record_index];
for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
if (!(rec->guid_indexes &
mlx4_ib_get_aguid_comp_mask_from_ix(i)))
continue ;
if (*(__be64 *)&rec->all_recs[i * GUID_REC_SIZE] ==
cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
delete_guid_indexes |=
mlx4_ib_get_aguid_comp_mask_from_ix(i);
else
set_guid_indexes |=
mlx4_ib_get_aguid_comp_mask_from_ix(i);
if (lowset_time_entry == -1 || rec->guids_retry_schedule[i] <=
lowest_time) {
lowset_time_entry = i;
lowest_time = rec->guids_retry_schedule[i];
}
}
memcpy(&next_rec->rec_det, rec, sizeof (*rec));
next_rec->port = port;
next_rec->block_num = record_index;
if (*(__be64 *)&rec->all_recs[lowset_time_entry * GUID_REC_SIZE] ==
cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL)) {
next_rec->rec_det.guid_indexes = delete_guid_indexes;
next_rec->method = MLX4_GUID_INFO_RECORD_DELETE;
} else {
next_rec->rec_det.guid_indexes = set_guid_indexes;
next_rec->method = MLX4_GUID_INFO_RECORD_SET;
}
}
/* return index of record that should be updated based on lowest
* rescheduled time
*/
static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port,
int *resched_delay_sec)
{
int record_index = -1 ;
u64 low_record_time = 0 ;
struct mlx4_sriov_alias_guid_info_rec_det rec;
int j;
for (j = 0 ; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
rec = dev->sriov.alias_guid.ports_guid[port].
all_rec_per_port[j];
if (rec.status == MLX4_GUID_INFO_STATUS_IDLE &&
rec.guid_indexes) {
if (record_index == -1 ||
rec.time_to_run < low_record_time) {
record_index = j;
low_record_time = rec.time_to_run;
}
}
}
if (resched_delay_sec) {
u64 curr_time = ktime_get_boottime_ns();
*resched_delay_sec = (low_record_time < curr_time) ? 0 :
div_u64((low_record_time - curr_time), NSEC_PER_SEC);
}
return record_index;
}
/* The function returns the next record that was
* not configured (or failed to be configured) */
static int get_next_record_to_update(struct mlx4_ib_dev *dev, u8 port,
struct mlx4_next_alias_guid_work *rec)
{
unsigned long flags;
int record_index;
int ret = 0 ;
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
record_index = get_low_record_time_index(dev, port, NULL);
if (record_index < 0 ) {
ret = -ENOENT;
goto out;
}
set_required_record(dev, port, rec, record_index);
out:
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
return ret;
}
static void alias_guid_work(struct work_struct *work)
{
struct delayed_work *delay = to_delayed_work(work);
int ret = 0 ;
struct mlx4_next_alias_guid_work *rec;
struct mlx4_sriov_alias_guid_port_rec_det *sriov_alias_port =
container_of(delay, struct mlx4_sriov_alias_guid_port_rec_det,
alias_guid_work);
struct mlx4_sriov_alias_guid *sriov_alias_guid = sriov_alias_port->parent;
struct mlx4_ib_sriov *ib_sriov = container_of(sriov_alias_guid,
struct mlx4_ib_sriov,
alias_guid);
struct mlx4_ib_dev *dev = container_of(ib_sriov, struct mlx4_ib_dev, sriov);
rec = kzalloc(sizeof *rec, GFP_KERNEL);
if (!rec)
return ;
pr_debug("starting [port: %d]...\n" , sriov_alias_port->port + 1 );
ret = get_next_record_to_update(dev, sriov_alias_port->port, rec);
if (ret) {
pr_debug("No more records to update.\n" );
goto out;
}
set_guid_rec(&dev->ib_dev, rec);
out:
kfree(rec);
}
void mlx4_ib_init_alias_guid_work(struct mlx4_ib_dev *dev, int port)
{
unsigned long flags, flags1;
if (!mlx4_is_master(dev->dev))
return ;
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
if (!dev->sriov.is_going_down) {
/* If there is pending one should cancel then run, otherwise
* won ' t run till previous one is ended as same work
* struct is used .
*/
cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[port].
alias_guid_work);
queue_delayed_work(dev->sriov.alias_guid.ports_guid[port].wq,
&dev->sriov.alias_guid.ports_guid[port].alias_guid_work, 0 );
}
spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
}
void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev)
{
int i;
struct mlx4_ib_sriov *sriov = &dev->sriov;
struct mlx4_alias_guid_work_context *cb_ctx;
struct mlx4_sriov_alias_guid_port_rec_det *det;
struct ib_sa_query *sa_query;
unsigned long flags;
for (i = 0 ; i < dev->num_ports; i++) {
det = &sriov->alias_guid.ports_guid[i];
cancel_delayed_work_sync(&det->alias_guid_work);
spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
while (!list_empty(&det->cb_list)) {
cb_ctx = list_entry(det->cb_list.next,
struct mlx4_alias_guid_work_context,
list);
sa_query = cb_ctx->sa_query;
cb_ctx->sa_query = NULL;
list_del(&cb_ctx->list);
spin_unlock_irqrestore(&sriov->alias_guid.ag_work_lock, flags);
ib_sa_cancel_query(cb_ctx->query_id, sa_query);
wait_for_completion(&cb_ctx->done);
kfree(cb_ctx);
spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
}
spin_unlock_irqrestore(&sriov->alias_guid.ag_work_lock, flags);
}
for (i = 0 ; i < dev->num_ports; i++)
destroy_workqueue(dev->sriov.alias_guid.ports_guid[i].wq);
ib_sa_unregister_client(dev->sriov.alias_guid.sa_client);
kfree(dev->sriov.alias_guid.sa_client);
}
int mlx4_ib_init_alias_guid_service(struct mlx4_ib_dev *dev)
{
int ret = 0 ;
int i, j;
union ib_gid gid;
if (!mlx4_is_master(dev->dev))
return 0 ;
dev->sriov.alias_guid.sa_client =
kzalloc(sizeof *dev->sriov.alias_guid.sa_client, GFP_KERNEL);
if (!dev->sriov.alias_guid.sa_client)
return -ENOMEM;
ib_sa_register_client(dev->sriov.alias_guid.sa_client);
spin_lock_init(&dev->sriov.alias_guid.ag_work_lock);
for (i = 1 ; i <= dev->num_ports; ++i) {
if (dev->ib_dev.ops.query_gid(&dev->ib_dev, i, 0 , &gid)) {
ret = -EFAULT;
goto err_unregister;
}
}
for (i = 0 ; i < dev->num_ports; i++) {
memset(&dev->sriov.alias_guid.ports_guid[i], 0 ,
sizeof (struct mlx4_sriov_alias_guid_port_rec_det));
dev->sriov.alias_guid.ports_guid[i].state_flags |=
GUID_STATE_NEED_PORT_INIT;
for (j = 0 ; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
/* mark each val as it was deleted */
memset(dev->sriov.alias_guid.ports_guid[i].
all_rec_per_port[j].all_recs, 0 xFF,
sizeof (dev->sriov.alias_guid.ports_guid[i].
all_rec_per_port[j].all_recs));
}
INIT_LIST_HEAD(&dev->sriov.alias_guid.ports_guid[i].cb_list);
/*prepare the records, set them to be allocated by sm*/
if (mlx4_ib_sm_guid_assign)
for (j = 1 ; j < NUM_ALIAS_GUID_PER_PORT; j++)
mlx4_set_admin_guid(dev->dev, 0 , j, i + 1 );
for (j = 0 ; j < NUM_ALIAS_GUID_REC_IN_PORT; j++)
invalidate_guid_record(dev, i + 1 , j);
dev->sriov.alias_guid.ports_guid[i].parent = &dev->sriov.alias_guid;
dev->sriov.alias_guid.ports_guid[i].port = i;
dev->sriov.alias_guid.ports_guid[i].wq =
alloc_ordered_workqueue("alias_guid%d" , WQ_MEM_RECLAIM, i);
if (!dev->sriov.alias_guid.ports_guid[i].wq) {
ret = -ENOMEM;
goto err_thread;
}
INIT_DELAYED_WORK(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work,
alias_guid_work);
}
return 0 ;
err_thread:
for (--i; i >= 0 ; i--) {
destroy_workqueue(dev->sriov.alias_guid.ports_guid[i].wq);
dev->sriov.alias_guid.ports_guid[i].wq = NULL;
}
err_unregister:
ib_sa_unregister_client(dev->sriov.alias_guid.sa_client);
kfree(dev->sriov.alias_guid.sa_client);
dev->sriov.alias_guid.sa_client = NULL;
pr_err("init_alias_guid_service: Failed. (ret:%d)\n" , ret);
return ret;
}
Messung V0.5 in Prozent C=97 H=76 G=86
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-10-03)
¤
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