diff options
Diffstat (limited to 'drivers/crypto/intel/qat/qat_common/qat_crypto.c')
| -rw-r--r-- | drivers/crypto/intel/qat/qat_common/qat_crypto.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/drivers/crypto/intel/qat/qat_common/qat_crypto.c b/drivers/crypto/intel/qat/qat_common/qat_crypto.c new file mode 100644 index 000000000000..40c8e74d1cf9 --- /dev/null +++ b/drivers/crypto/intel/qat/qat_common/qat_crypto.c @@ -0,0 +1,287 @@ +// 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); +} |