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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(C) 2021 Marvell.
 */

#include <rte_cryptodev.h>
#include <cryptodev_pmd.h>
#include <rte_event_crypto_adapter.h>
#include <rte_ip.h>
#include <rte_vect.h>

#include "cn9k_cryptodev.h"
#include "cn9k_cryptodev_ops.h"
#include "cn9k_ipsec.h"
#include "cn9k_ipsec_la_ops.h"
#include "cnxk_ae.h"
#include "cnxk_cryptodev.h"
#include "cnxk_cryptodev_ops.h"
#include "cnxk_se.h"

static __rte_always_inline int __rte_hot
cn9k_cpt_sym_inst_fill(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op,
		       struct cnxk_se_sess *sess,
		       struct cpt_inflight_req *infl_req,
		       struct cpt_inst_s *inst)
{
	uint64_t cpt_op;
	int ret;

	cpt_op = sess->cpt_op;

	if (cpt_op & ROC_SE_OP_CIPHER_MASK)
		ret = fill_fc_params(op, sess, &qp->meta_info, infl_req, inst);
	else
		ret = fill_digest_params(op, sess, &qp->meta_info, infl_req,
					 inst);

	return ret;
}

static __rte_always_inline int __rte_hot
cn9k_cpt_sec_inst_fill(struct rte_crypto_op *op,
		       struct cpt_inflight_req *infl_req,
		       struct cpt_inst_s *inst)
{
	struct rte_crypto_sym_op *sym_op = op->sym;
	struct cn9k_sec_session *priv;
	struct cn9k_ipsec_sa *sa;

	if (unlikely(sym_op->m_dst && sym_op->m_dst != sym_op->m_src)) {
		plt_dp_err("Out of place is not supported");
		return -ENOTSUP;
	}

	if (unlikely(!rte_pktmbuf_is_contiguous(sym_op->m_src))) {
		plt_dp_err("Scatter Gather mode is not supported");
		return -ENOTSUP;
	}

	priv = get_sec_session_private_data(op->sym->sec_session);
	sa = &priv->sa;

	if (sa->dir == RTE_SECURITY_IPSEC_SA_DIR_EGRESS)
		return process_outb_sa(op, sa, inst);

	infl_req->op_flags |= CPT_OP_FLAGS_IPSEC_DIR_INBOUND;

	return process_inb_sa(op, sa, inst);
}

static inline struct cnxk_se_sess *
cn9k_cpt_sym_temp_sess_create(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op)
{
	const int driver_id = cn9k_cryptodev_driver_id;
	struct rte_crypto_sym_op *sym_op = op->sym;
	struct rte_cryptodev_sym_session *sess;
	struct cnxk_se_sess *priv;
	int ret;

	/* Create temporary session */
	sess = rte_cryptodev_sym_session_create(qp->sess_mp);
	if (sess == NULL)
		return NULL;

	ret = sym_session_configure(qp->lf.roc_cpt, driver_id, sym_op->xform,
				    sess, qp->sess_mp_priv);
	if (ret)
		goto sess_put;

	priv = get_sym_session_private_data(sess, driver_id);

	sym_op->session = sess;

	return priv;

sess_put:
	rte_mempool_put(qp->sess_mp, sess);
	return NULL;
}

static inline int
cn9k_cpt_inst_prep(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op,
		   struct cpt_inflight_req *infl_req, struct cpt_inst_s *inst)
{
	int ret;

	if (op->type == RTE_CRYPTO_OP_TYPE_SYMMETRIC) {
		struct rte_crypto_sym_op *sym_op;
		struct cnxk_se_sess *sess;

		if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
			sym_op = op->sym;
			sess = get_sym_session_private_data(
				sym_op->session, cn9k_cryptodev_driver_id);
			ret = cn9k_cpt_sym_inst_fill(qp, op, sess, infl_req,
						     inst);
			inst->w7.u64 = sess->cpt_inst_w7;
		} else if (op->sess_type == RTE_CRYPTO_OP_SECURITY_SESSION)
			ret = cn9k_cpt_sec_inst_fill(op, infl_req, inst);
		else {
			sess = cn9k_cpt_sym_temp_sess_create(qp, op);
			if (unlikely(sess == NULL)) {
				plt_dp_err("Could not create temp session");
				return -1;
			}

			ret = cn9k_cpt_sym_inst_fill(qp, op, sess, infl_req,
						     inst);
			if (unlikely(ret)) {
				sym_session_clear(cn9k_cryptodev_driver_id,
						  op->sym->session);
				rte_mempool_put(qp->sess_mp, op->sym->session);
			}
			inst->w7.u64 = sess->cpt_inst_w7;
		}
	} else if (op->type == RTE_CRYPTO_OP_TYPE_ASYMMETRIC) {
		struct rte_crypto_asym_op *asym_op;
		struct cnxk_ae_sess *sess;

		if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
			asym_op = op->asym;
			sess = get_asym_session_private_data(
				asym_op->session, cn9k_cryptodev_driver_id);
			ret = cnxk_ae_enqueue(qp, op, infl_req, inst, sess);
			inst->w7.u64 = sess->cpt_inst_w7;
		} else {
			ret = -EINVAL;
		}
	} else {
		ret = -EINVAL;
		plt_dp_err("Unsupported op type");
	}

	return ret;
}

static inline void
cn9k_cpt_inst_submit(struct cpt_inst_s *inst, uint64_t lmtline,
		     uint64_t io_addr)
{
	uint64_t lmt_status;

	do {
		/* Copy CPT command to LMTLINE */
		roc_lmt_mov((void *)lmtline, inst, 2);

		/*
		 * Make sure compiler does not reorder memcpy and ldeor.
		 * LMTST transactions are always flushed from the write
		 * buffer immediately, a DMB is not required to push out
		 * LMTSTs.
		 */
		rte_io_wmb();
		lmt_status = roc_lmt_submit_ldeor(io_addr);
	} while (lmt_status == 0);
}

static __plt_always_inline void
cn9k_cpt_inst_submit_dual(struct cpt_inst_s *inst, uint64_t lmtline,
			  uint64_t io_addr)
{
	uint64_t lmt_status;

	do {
		/* Copy 2 CPT inst_s to LMTLINE */
#if defined(RTE_ARCH_ARM64)
		uint64_t *s = (uint64_t *)inst;
		uint64_t *d = (uint64_t *)lmtline;

		vst1q_u64(&d[0], vld1q_u64(&s[0]));
		vst1q_u64(&d[2], vld1q_u64(&s[2]));
		vst1q_u64(&d[4], vld1q_u64(&s[4]));
		vst1q_u64(&d[6], vld1q_u64(&s[6]));
		vst1q_u64(&d[8], vld1q_u64(&s[8]));
		vst1q_u64(&d[10], vld1q_u64(&s[10]));
		vst1q_u64(&d[12], vld1q_u64(&s[12]));
		vst1q_u64(&d[14], vld1q_u64(&s[14]));
#else
		roc_lmt_mov_seg((void *)lmtline, inst, 8);
#endif

		/*
		 * Make sure compiler does not reorder memcpy and ldeor.
		 * LMTST transactions are always flushed from the write
		 * buffer immediately, a DMB is not required to push out
		 * LMTSTs.
		 */
		rte_io_wmb();
		lmt_status = roc_lmt_submit_ldeor(io_addr);
	} while (lmt_status == 0);
}

static uint16_t
cn9k_cpt_enqueue_burst(void *qptr, struct rte_crypto_op **ops, uint16_t nb_ops)
{
	struct cpt_inflight_req *infl_req_1, *infl_req_2;
	struct cpt_inst_s inst[2] __rte_cache_aligned;
	struct rte_crypto_op *op_1, *op_2;
	uint16_t nb_allowed, count = 0;
	struct cnxk_cpt_qp *qp = qptr;
	struct pending_queue *pend_q;
	uint64_t head;
	int ret;

	pend_q = &qp->pend_q;

	const uint64_t lmt_base = qp->lf.lmt_base;
	const uint64_t io_addr = qp->lf.io_addr;
	const uint64_t pq_mask = pend_q->pq_mask;

	/* Clear w0, w2, w3 of both inst */

	inst[0].w0.u64 = 0;
	inst[0].w2.u64 = 0;
	inst[0].w3.u64 = 0;
	inst[1].w0.u64 = 0;
	inst[1].w2.u64 = 0;
	inst[1].w3.u64 = 0;

	head = pend_q->head;
	nb_allowed = pending_queue_free_cnt(head, pend_q->tail, pq_mask);
	nb_ops = RTE_MIN(nb_ops, nb_allowed);

	if (unlikely(nb_ops & 1)) {
		op_1 = ops[0];
		infl_req_1 = &pend_q->req_queue[head];
		infl_req_1->op_flags = 0;

		ret = cn9k_cpt_inst_prep(qp, op_1, infl_req_1, &inst[0]);
		if (unlikely(ret)) {
			plt_dp_err("Could not process op: %p", op_1);
			return 0;
		}

		infl_req_1->cop = op_1;
		infl_req_1->res.cn9k.compcode = CPT_COMP_NOT_DONE;
		inst[0].res_addr = (uint64_t)&infl_req_1->res;

		cn9k_cpt_inst_submit(&inst[0], lmt_base, io_addr);
		pending_queue_advance(&head, pq_mask);
		count++;
	}

	while (count < nb_ops) {
		op_1 = ops[count];
		op_2 = ops[count + 1];

		infl_req_1 = &pend_q->req_queue[head];
		pending_queue_advance(&head, pq_mask);
		infl_req_2 = &pend_q->req_queue[head];
		pending_queue_advance(&head, pq_mask);

		infl_req_1->cop = op_1;
		infl_req_2->cop = op_2;
		infl_req_1->op_flags = 0;
		infl_req_2->op_flags = 0;

		infl_req_1->res.cn9k.compcode = CPT_COMP_NOT_DONE;
		inst[0].res_addr = (uint64_t)&infl_req_1->res;

		infl_req_2->res.cn9k.compcode = CPT_COMP_NOT_DONE;
		inst[1].res_addr = (uint64_t)&infl_req_2->res;

		ret = cn9k_cpt_inst_prep(qp, op_1, infl_req_1, &inst[0]);
		if (unlikely(ret)) {
			plt_dp_err("Could not process op: %p", op_1);
			pending_queue_retreat(&head, pq_mask, 2);
			break;
		}

		ret = cn9k_cpt_inst_prep(qp, op_2, infl_req_2, &inst[1]);
		if (unlikely(ret)) {
			plt_dp_err("Could not process op: %p", op_2);
			pending_queue_retreat(&head, pq_mask, 1);
			cn9k_cpt_inst_submit(&inst[0], lmt_base, io_addr);
			count++;
			break;
		}

		cn9k_cpt_inst_submit_dual(&inst[0], lmt_base, io_addr);

		count += 2;
	}

	rte_atomic_thread_fence(__ATOMIC_RELEASE);

	pend_q->head = head;
	pend_q->time_out = rte_get_timer_cycles() +
			   DEFAULT_COMMAND_TIMEOUT * rte_get_timer_hz();

	return count;
}

uint16_t
cn9k_cpt_crypto_adapter_enqueue(uintptr_t tag_op, struct rte_crypto_op *op)
{
	union rte_event_crypto_metadata *ec_mdata;
	struct cpt_inflight_req *infl_req;
	struct rte_event *rsp_info;
	struct cnxk_cpt_qp *qp;
	struct cpt_inst_s inst;
	uint8_t cdev_id;
	uint16_t qp_id;
	int ret;

	ec_mdata = cnxk_event_crypto_mdata_get(op);
	if (!ec_mdata) {
		rte_errno = EINVAL;
		return 0;
	}

	cdev_id = ec_mdata->request_info.cdev_id;
	qp_id = ec_mdata->request_info.queue_pair_id;
	qp = rte_cryptodevs[cdev_id].data->queue_pairs[qp_id];
	rsp_info = &ec_mdata->response_info;

	if (unlikely(!qp->ca.enabled)) {
		rte_errno = EINVAL;
		return 0;
	}

	if (unlikely(rte_mempool_get(qp->ca.req_mp, (void **)&infl_req))) {
		rte_errno = ENOMEM;
		return 0;
	}
	infl_req->op_flags = 0;

	ret = cn9k_cpt_inst_prep(qp, op, infl_req, &inst);
	if (unlikely(ret)) {
		plt_dp_err("Could not process op: %p", op);
		rte_mempool_put(qp->ca.req_mp, infl_req);
		return 0;
	}

	infl_req->cop = op;
	infl_req->res.cn9k.compcode = CPT_COMP_NOT_DONE;
	infl_req->qp = qp;
	inst.w0.u64 = 0;
	inst.res_addr = (uint64_t)&infl_req->res;
	inst.w2.u64 = CNXK_CPT_INST_W2(
		(RTE_EVENT_TYPE_CRYPTODEV << 28) | rsp_info->flow_id,
		rsp_info->sched_type, rsp_info->queue_id, 0);
	inst.w3.u64 = CNXK_CPT_INST_W3(1, infl_req);

	if (roc_cpt_is_iq_full(&qp->lf)) {
		rte_mempool_put(qp->ca.req_mp, infl_req);
		rte_errno = EAGAIN;
		return 0;
	}

	if (!rsp_info->sched_type)
		roc_sso_hws_head_wait(tag_op);

	cn9k_cpt_inst_submit(&inst, qp->lmtline.lmt_base, qp->lmtline.io_addr);

	return 1;
}

static inline void
cn9k_cpt_sec_post_process(struct rte_crypto_op *cop,
			  struct cpt_inflight_req *infl_req)
{
	struct rte_crypto_sym_op *sym_op = cop->sym;
	struct rte_mbuf *m = sym_op->m_src;
	struct rte_ipv6_hdr *ip6;
	struct rte_ipv4_hdr *ip;
	uint16_t m_len = 0;
	char *data;

	if (infl_req->op_flags & CPT_OP_FLAGS_IPSEC_DIR_INBOUND) {
		data = rte_pktmbuf_mtod(m, char *);

		ip = (struct rte_ipv4_hdr *)(data + ROC_IE_ON_INB_RPTR_HDR);

		if (((ip->version_ihl & 0xf0) >> RTE_IPV4_IHL_MULTIPLIER) ==
		    IPVERSION) {
			m_len = rte_be_to_cpu_16(ip->total_length);
		} else {
			PLT_ASSERT(((ip->version_ihl & 0xf0) >>
				    RTE_IPV4_IHL_MULTIPLIER) == 6);
			ip6 = (struct rte_ipv6_hdr *)ip;
			m_len = rte_be_to_cpu_16(ip6->payload_len) +
				sizeof(struct rte_ipv6_hdr);
		}

		m->data_len = m_len;
		m->pkt_len = m_len;
		m->data_off += ROC_IE_ON_INB_RPTR_HDR;
	}
}

static inline void
cn9k_cpt_dequeue_post_process(struct cnxk_cpt_qp *qp, struct rte_crypto_op *cop,
			      struct cpt_inflight_req *infl_req)
{
	struct cpt_cn9k_res_s *res = (struct cpt_cn9k_res_s *)&infl_req->res;
	unsigned int sz;

	if (likely(res->compcode == CPT_COMP_GOOD)) {
		if (unlikely(res->uc_compcode)) {
			if (res->uc_compcode == ROC_SE_ERR_GC_ICV_MISCOMPARE)
				cop->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
			else
				cop->status = RTE_CRYPTO_OP_STATUS_ERROR;

			plt_dp_info("Request failed with microcode error");
			plt_dp_info("MC completion code 0x%x",
				    res->uc_compcode);
			goto temp_sess_free;
		}

		cop->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
		if (cop->type == RTE_CRYPTO_OP_TYPE_SYMMETRIC) {
			if (cop->sess_type == RTE_CRYPTO_OP_SECURITY_SESSION) {
				cn9k_cpt_sec_post_process(cop, infl_req);
				return;
			}

			/* Verify authentication data if required */
			if (unlikely(infl_req->op_flags &
				     CPT_OP_FLAGS_AUTH_VERIFY)) {
				uintptr_t *rsp = infl_req->mdata;
				compl_auth_verify(cop, (uint8_t *)rsp[0],
						  rsp[1]);
			}
		} else if (cop->type == RTE_CRYPTO_OP_TYPE_ASYMMETRIC) {
			struct rte_crypto_asym_op *op = cop->asym;
			uintptr_t *mdata = infl_req->mdata;
			struct cnxk_ae_sess *sess;

			sess = get_asym_session_private_data(
				op->session, cn9k_cryptodev_driver_id);

			cnxk_ae_post_process(cop, sess, (uint8_t *)mdata[0]);
		}
	} else {
		cop->status = RTE_CRYPTO_OP_STATUS_ERROR;
		plt_dp_info("HW completion code 0x%x", res->compcode);

		switch (res->compcode) {
		case CPT_COMP_INSTERR:
			plt_dp_err("Request failed with instruction error");
			break;
		case CPT_COMP_FAULT:
			plt_dp_err("Request failed with DMA fault");
			break;
		case CPT_COMP_HWERR:
			plt_dp_err("Request failed with hardware error");
			break;
		default:
			plt_dp_err(
				"Request failed with unknown completion code");
		}
	}

temp_sess_free:
	if (unlikely(cop->sess_type == RTE_CRYPTO_OP_SESSIONLESS)) {
		if (cop->type == RTE_CRYPTO_OP_TYPE_SYMMETRIC) {
			sym_session_clear(cn9k_cryptodev_driver_id,
					  cop->sym->session);
			sz = rte_cryptodev_sym_get_existing_header_session_size(
				cop->sym->session);
			memset(cop->sym->session, 0, sz);
			rte_mempool_put(qp->sess_mp, cop->sym->session);
			cop->sym->session = NULL;
		}
	}
}

uintptr_t
cn9k_cpt_crypto_adapter_dequeue(uintptr_t get_work1)
{
	struct cpt_inflight_req *infl_req;
	struct rte_crypto_op *cop;
	struct cnxk_cpt_qp *qp;

	infl_req = (struct cpt_inflight_req *)(get_work1);
	cop = infl_req->cop;
	qp = infl_req->qp;

	cn9k_cpt_dequeue_post_process(qp, infl_req->cop, infl_req);

	if (unlikely(infl_req->op_flags & CPT_OP_FLAGS_METABUF))
		rte_mempool_put(qp->meta_info.pool, infl_req->mdata);

	rte_mempool_put(qp->ca.req_mp, infl_req);
	return (uintptr_t)cop;
}

static uint16_t
cn9k_cpt_dequeue_burst(void *qptr, struct rte_crypto_op **ops, uint16_t nb_ops)
{
	struct cpt_inflight_req *infl_req;
	struct cnxk_cpt_qp *qp = qptr;
	struct pending_queue *pend_q;
	struct cpt_cn9k_res_s *res;
	uint64_t infl_cnt, pq_tail;
	struct rte_crypto_op *cop;
	int i;

	pend_q = &qp->pend_q;

	const uint64_t pq_mask = pend_q->pq_mask;

	pq_tail = pend_q->tail;
	infl_cnt = pending_queue_infl_cnt(pend_q->head, pq_tail, pq_mask);
	nb_ops = RTE_MIN(nb_ops, infl_cnt);

	/* Ensure infl_cnt isn't read before data lands */
	rte_atomic_thread_fence(__ATOMIC_ACQUIRE);

	for (i = 0; i < nb_ops; i++) {
		infl_req = &pend_q->req_queue[pq_tail];

		res = (struct cpt_cn9k_res_s *)&infl_req->res;

		if (unlikely(res->compcode == CPT_COMP_NOT_DONE)) {
			if (unlikely(rte_get_timer_cycles() >
				     pend_q->time_out)) {
				plt_err("Request timed out");
				pend_q->time_out = rte_get_timer_cycles() +
						   DEFAULT_COMMAND_TIMEOUT *
							   rte_get_timer_hz();
			}
			break;
		}

		pending_queue_advance(&pq_tail, pq_mask);

		cop = infl_req->cop;

		ops[i] = cop;

		cn9k_cpt_dequeue_post_process(qp, cop, infl_req);

		if (unlikely(infl_req->op_flags & CPT_OP_FLAGS_METABUF))
			rte_mempool_put(qp->meta_info.pool, infl_req->mdata);
	}

	pend_q->tail = pq_tail;

	return i;
}
void
cn9k_cpt_set_enqdeq_fns(struct rte_cryptodev *dev)
{
	dev->enqueue_burst = cn9k_cpt_enqueue_burst;
	dev->dequeue_burst = cn9k_cpt_dequeue_burst;

	rte_mb();
}

static void
cn9k_cpt_dev_info_get(struct rte_cryptodev *dev,
		      struct rte_cryptodev_info *info)
{
	if (info != NULL) {
		cnxk_cpt_dev_info_get(dev, info);
		info->driver_id = cn9k_cryptodev_driver_id;
	}
}

struct rte_cryptodev_ops cn9k_cpt_ops = {
	/* Device control ops */
	.dev_configure = cnxk_cpt_dev_config,
	.dev_start = cnxk_cpt_dev_start,
	.dev_stop = cnxk_cpt_dev_stop,
	.dev_close = cnxk_cpt_dev_close,
	.dev_infos_get = cn9k_cpt_dev_info_get,

	.stats_get = NULL,
	.stats_reset = NULL,
	.queue_pair_setup = cnxk_cpt_queue_pair_setup,
	.queue_pair_release = cnxk_cpt_queue_pair_release,

	/* Symmetric crypto ops */
	.sym_session_get_size = cnxk_cpt_sym_session_get_size,
	.sym_session_configure = cnxk_cpt_sym_session_configure,
	.sym_session_clear = cnxk_cpt_sym_session_clear,

	/* Asymmetric crypto ops */
	.asym_session_get_size = cnxk_ae_session_size_get,
	.asym_session_configure = cnxk_ae_session_cfg,
	.asym_session_clear = cnxk_ae_session_clear,

};