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