hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

crypto: qat - Add load balancing across devices 

Load balancing of crypto instances only used a single device.
There was no problem with that on PF, but since there is only
one or two instance per VF we need to loadbalance across devices.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tadeusz Struk 2015-09-16 05:33:06 -07:00 committed by Herbert Xu
parent 859e58055a
commit 3cc43a0a5c
1 changed files with 31 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
drivers/crypto/qat/qat_common/qat_crypto.c
View File

@ -60,8 +60,8 @@ static struct service_hndl qat_crypto;
void qat_crypto_put_instance(struct qat_crypto_instance *inst)
{
if (atomic_sub_return(1, &inst->refctr) == 0)
adf_dev_put(inst->accel_dev);
atomic_dec(&inst->refctr);
adf_dev_put(inst->accel_dev);
}
static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
@ -97,19 +97,26 @@ static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
{
struct adf_accel_dev *accel_dev = NULL;
struct qat_crypto_instance *inst_best = NULL;
struct qat_crypto_instance *inst = NULL;
struct list_head *itr;
unsigned long best = ~0;
list_for_each(itr, adf_devmgr_get_head()) {
accel_dev = list_entry(itr, struct adf_accel_dev, list);
struct adf_accel_dev *tmp_dev;
unsigned long ctr;
if ((node == dev_to_node(&GET_DEV(accel_dev)) ||
dev_to_node(&GET_DEV(accel_dev)) < 0) &&
adf_dev_started(accel_dev) &&
!list_empty(&accel_dev->crypto_list))
break;
accel_dev = NULL;
tmp_dev = list_entry(itr, struct adf_accel_dev, list);
if ((node == dev_to_node(&GET_DEV(tmp_dev)) ||
dev_to_node(&GET_DEV(tmp_dev)) < 0) &&
adf_dev_started(tmp_dev) &&
!list_empty(&tmp_dev->crypto_list)) {
ctr = atomic_read(&tmp_dev->ref_count);
if (best > ctr) {
accel_dev = tmp_dev;
best = ctr;
}
}
}
if (!accel_dev) {
pr_err("QAT: Could not find a device on node %d\n", node);
@ -118,28 +125,26 @@ struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
if (!accel_dev || !adf_dev_started(accel_dev))
return NULL;
best = ~0;
list_for_each(itr, &accel_dev->crypto_list) {
struct qat_crypto_instance *inst;
unsigned long cur;
struct qat_crypto_instance *tmp_inst;
unsigned long ctr;
inst = list_entry(itr, struct qat_crypto_instance, list);
cur = atomic_read(&inst->refctr);
if (best > cur) {
inst_best = inst;
best = cur;
tmp_inst = list_entry(itr, struct qat_crypto_instance, list);
ctr = atomic_read(&tmp_inst->refctr);
if (best > ctr) {
inst = tmp_inst;
best = ctr;
}
}
if (inst_best) {
if (atomic_add_return(1, &inst_best->refctr) == 1) {
if (adf_dev_get(accel_dev)) {
atomic_dec(&inst_best->refctr);
dev_err(&GET_DEV(accel_dev),
"Could not increment dev refctr\n");
return NULL;
}
if (inst) {
if (adf_dev_get(accel_dev)) {
dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
return NULL;
}
atomic_inc(&inst->refctr);
}
return inst_best;
return inst;
}
static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)