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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include <linux/module.h>
#include <linux/slab.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_transport.h"
#include "adf_cfg.h"
#include "adf_cfg_strings.h"
#include "adf_gen2_hw_data.h"
#include "qat_crypto.h"
#include "icp_qat_fw.h"
#define SEC ADF_KERNEL_SEC
static struct service_hndl qat_crypto;
void qat_crypto_put_instance(struct qat_crypto_instance *inst)
{
atomic_dec(&inst->refctr);
adf_dev_put(inst->accel_dev);
}
static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
{
struct qat_crypto_instance *inst, *tmp;
int i;
list_for_each_entry_safe(inst, tmp, &accel_dev->crypto_list, list) {
for (i = 0; i < atomic_read(&inst->refctr); i++)
qat_crypto_put_instance(inst);
if (inst->sym_tx)
adf_remove_ring(inst->sym_tx);
if (inst->sym_rx)
adf_remove_ring(inst->sym_rx);
if (inst->pke_tx)
adf_remove_ring(inst->pke_tx);
if (inst->pke_rx)
adf_remove_ring(inst->pke_rx);
list_del(&inst->list);
kfree(inst);
}
return 0;
}
struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
{
struct adf_accel_dev *accel_dev = NULL, *tmp_dev;
struct qat_crypto_instance *inst = NULL, *tmp_inst;
unsigned long best = ~0;
list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
unsigned long ctr;
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_debug_ratelimited("QAT: Could not find a device on node %d\n", node);
/* Get any started device */
list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
if (adf_dev_started(tmp_dev) &&
!list_empty(&tmp_dev->crypto_list)) {
accel_dev = tmp_dev;
break;
}
}
}
if (!accel_dev)
return NULL;
best = ~0;
list_for_each_entry(tmp_inst, &accel_dev->crypto_list, list) {
unsigned long ctr;
ctr = atomic_read(&tmp_inst->refctr);
if (best > ctr) {
inst = tmp_inst;
best = ctr;
}
}
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;
}
/**
* qat_crypto_vf_dev_config()
* create dev config required to create crypto inst.
*
* @accel_dev: Pointer to acceleration device.
*
* Function creates device configuration required to create
* asym, sym or, crypto instances
*
* Return: 0 on success, error code otherwise.
*/
int qat_crypto_vf_dev_config(struct adf_accel_dev *accel_dev)
{
u16 ring_to_svc_map = GET_HW_DATA(accel_dev)->ring_to_svc_map;
if (ring_to_svc_map != ADF_GEN2_DEFAULT_RING_TO_SRV_MAP) {
dev_err(&GET_DEV(accel_dev),
"Unsupported ring/service mapping present on PF");
return -EFAULT;
}
return GET_HW_DATA(accel_dev)->dev_config(accel_dev);
}
static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
{
unsigned long num_inst, num_msg_sym, num_msg_asym;
char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
unsigned long sym_bank, asym_bank;
struct qat_crypto_instance *inst;
int msg_size;
int ret;
int i;
INIT_LIST_HEAD(&accel_dev->crypto_list);
ret = adf_cfg_get_param_value(accel_dev, SEC, ADF_NUM_CY, val);
if (ret)
return ret;
ret = kstrtoul(val, 0, &num_inst);
if (ret)
return ret;
for (i = 0; i < num_inst; i++) {
inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
dev_to_node(&GET_DEV(accel_dev)));
if (!inst) {
ret = -ENOMEM;
goto err;
}
list_add_tail(&inst->list, &accel_dev->crypto_list);
inst->id = i;
atomic_set(&inst->refctr, 0);
inst->accel_dev = accel_dev;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_BANK_NUM, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
goto err;
ret = kstrtoul(val, 10, &sym_bank);
if (ret)
goto err;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_BANK_NUM, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
goto err;
ret = kstrtoul(val, 10, &asym_bank);
if (ret)
goto err;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
goto err;
ret = kstrtoul(val, 10, &num_msg_sym);
if (ret)
goto err;
num_msg_sym = num_msg_sym >> 1;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
goto err;
ret = kstrtoul(val, 10, &num_msg_asym);
if (ret)
goto err;
num_msg_asym = num_msg_asym >> 1;
msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
ret = adf_create_ring(accel_dev, SEC, sym_bank, num_msg_sym,
msg_size, key, NULL, 0, &inst->sym_tx);
if (ret)
goto err;
msg_size = msg_size >> 1;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
ret = adf_create_ring(accel_dev, SEC, asym_bank, num_msg_asym,
msg_size, key, NULL, 0, &inst->pke_tx);
if (ret)
goto err;
msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
ret = adf_create_ring(accel_dev, SEC, sym_bank, num_msg_sym,
msg_size, key, qat_alg_callback, 0,
&inst->sym_rx);
if (ret)
goto err;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
ret = adf_create_ring(accel_dev, SEC, asym_bank, num_msg_asym,
msg_size, key, qat_alg_asym_callback, 0,
&inst->pke_rx);
if (ret)
goto err;
INIT_LIST_HEAD(&inst->backlog.list);
spin_lock_init(&inst->backlog.lock);
}
return 0;
err:
qat_crypto_free_instances(accel_dev);
return ret;
}
static int qat_crypto_init(struct adf_accel_dev *accel_dev)
{
if (qat_crypto_create_instances(accel_dev))
return -EFAULT;
return 0;
}
static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
{
return qat_crypto_free_instances(accel_dev);
}
static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
enum adf_event event)
{
int ret;
switch (event) {
case ADF_EVENT_INIT:
ret = qat_crypto_init(accel_dev);
break;
case ADF_EVENT_SHUTDOWN:
ret = qat_crypto_shutdown(accel_dev);
break;
case ADF_EVENT_RESTARTING:
case ADF_EVENT_RESTARTED:
case ADF_EVENT_START:
case ADF_EVENT_STOP:
default:
ret = 0;
}
return ret;
}
int qat_crypto_register(void)
{
memset(&qat_crypto, 0, sizeof(qat_crypto));
qat_crypto.event_hld = qat_crypto_event_handler;
qat_crypto.name = "qat_crypto";
return adf_service_register(&qat_crypto);
}
int qat_crypto_unregister(void)
{
return adf_service_unregister(&qat_crypto);
}
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