New upstream version 18.08upstream/18.08

Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 527 insertions, 0 deletions

diff --git a/drivers/crypto/virtio/virtio_rxtx.c b/drivers/crypto/virtio/virtio_rxtx.c
new file mode 100644
index 00000000..e32a1ecd
--- /dev/null
+++ b/drivers/crypto/virtio/virtio_rxtx.c
@@ -0,0 +1,527 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 HUAWEI TECHNOLOGIES CO., LTD.
+ */
+#include <rte_cryptodev_pmd.h>
+
+#include "virtqueue.h"
+#include "virtio_cryptodev.h"
+#include "virtio_crypto_algs.h"
+
+static void
+vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
+{
+	struct vring_desc *dp, *dp_tail;
+	struct vq_desc_extra *dxp;
+	uint16_t desc_idx_last = desc_idx;
+
+	dp = &vq->vq_ring.desc[desc_idx];
+	dxp = &vq->vq_descx[desc_idx];
+	vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
+	if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
+		while (dp->flags & VRING_DESC_F_NEXT) {
+			desc_idx_last = dp->next;
+			dp = &vq->vq_ring.desc[dp->next];
+		}
+	}
+	dxp->ndescs = 0;
+
+	/*
+	 * We must append the existing free chain, if any, to the end of
+	 * newly freed chain. If the virtqueue was completely used, then
+	 * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
+	 */
+	if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) {
+		vq->vq_desc_head_idx = desc_idx;
+	} else {
+		dp_tail = &vq->vq_ring.desc[vq->vq_desc_tail_idx];
+		dp_tail->next = desc_idx;
+	}
+
+	vq->vq_desc_tail_idx = desc_idx_last;
+	dp->next = VQ_RING_DESC_CHAIN_END;
+}
+
+static uint16_t
+virtqueue_dequeue_burst_rx(struct virtqueue *vq,
+		struct rte_crypto_op **rx_pkts, uint16_t num)
+{
+	struct vring_used_elem *uep;
+	struct rte_crypto_op *cop;
+	uint16_t used_idx, desc_idx;
+	uint16_t i;
+	struct virtio_crypto_inhdr *inhdr;
+	struct virtio_crypto_op_cookie *op_cookie;
+
+	/* Caller does the check */
+	for (i = 0; i < num ; i++) {
+		used_idx = (uint16_t)(vq->vq_used_cons_idx
+				& (vq->vq_nentries - 1));
+		uep = &vq->vq_ring.used->ring[used_idx];
+		desc_idx = (uint16_t)uep->id;
+		cop = (struct rte_crypto_op *)
+				vq->vq_descx[desc_idx].crypto_op;
+		if (unlikely(cop == NULL)) {
+			VIRTIO_CRYPTO_RX_LOG_DBG("vring descriptor with no "
+					"mbuf cookie at %u",
+					vq->vq_used_cons_idx);
+			break;
+		}
+
+		op_cookie = (struct virtio_crypto_op_cookie *)
+						vq->vq_descx[desc_idx].cookie;
+		inhdr = &(op_cookie->inhdr);
+		switch (inhdr->status) {
+		case VIRTIO_CRYPTO_OK:
+			cop->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
+			break;
+		case VIRTIO_CRYPTO_ERR:
+			cop->status = RTE_CRYPTO_OP_STATUS_ERROR;
+			vq->packets_received_failed++;
+			break;
+		case VIRTIO_CRYPTO_BADMSG:
+			cop->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			vq->packets_received_failed++;
+			break;
+		case VIRTIO_CRYPTO_NOTSUPP:
+			cop->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			vq->packets_received_failed++;
+			break;
+		case VIRTIO_CRYPTO_INVSESS:
+			cop->status = RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
+			vq->packets_received_failed++;
+			break;
+		default:
+			break;
+		}
+
+		vq->packets_received_total++;
+
+		rx_pkts[i] = cop;
+		rte_mempool_put(vq->mpool, op_cookie);
+
+		vq->vq_used_cons_idx++;
+		vq_ring_free_chain(vq, desc_idx);
+		vq->vq_descx[desc_idx].crypto_op = NULL;
+	}
+
+	return i;
+}
+
+static int
+virtqueue_crypto_sym_pkt_header_arrange(
+		struct rte_crypto_op *cop,
+		struct virtio_crypto_op_data_req *data,
+		struct virtio_crypto_session *session)
+{
+	struct rte_crypto_sym_op *sym_op = cop->sym;
+	struct virtio_crypto_op_data_req *req_data = data;
+	struct virtio_crypto_op_ctrl_req *ctrl = &session->ctrl;
+	struct virtio_crypto_sym_create_session_req *sym_sess_req =
+		&ctrl->u.sym_create_session;
+	struct virtio_crypto_alg_chain_session_para *chain_para =
+		&sym_sess_req->u.chain.para;
+	struct virtio_crypto_cipher_session_para *cipher_para;
+
+	req_data->header.session_id = session->session_id;
+
+	switch (sym_sess_req->op_type) {
+	case VIRTIO_CRYPTO_SYM_OP_CIPHER:
+		req_data->u.sym_req.op_type = VIRTIO_CRYPTO_SYM_OP_CIPHER;
+
+		cipher_para = &sym_sess_req->u.cipher.para;
+		if (cipher_para->op == VIRTIO_CRYPTO_OP_ENCRYPT)
+			req_data->header.opcode = VIRTIO_CRYPTO_CIPHER_ENCRYPT;
+		else
+			req_data->header.opcode = VIRTIO_CRYPTO_CIPHER_DECRYPT;
+
+		req_data->u.sym_req.u.cipher.para.iv_len
+			= session->iv.length;
+
+		req_data->u.sym_req.u.cipher.para.src_data_len =
+			(sym_op->cipher.data.length +
+				sym_op->cipher.data.offset);
+		req_data->u.sym_req.u.cipher.para.dst_data_len =
+			req_data->u.sym_req.u.cipher.para.src_data_len;
+		break;
+	case VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING:
+		req_data->u.sym_req.op_type =
+			VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING;
+
+		cipher_para = &chain_para->cipher_param;
+		if (cipher_para->op == VIRTIO_CRYPTO_OP_ENCRYPT)
+			req_data->header.opcode = VIRTIO_CRYPTO_CIPHER_ENCRYPT;
+		else
+			req_data->header.opcode = VIRTIO_CRYPTO_CIPHER_DECRYPT;
+
+		req_data->u.sym_req.u.chain.para.iv_len = session->iv.length;
+		req_data->u.sym_req.u.chain.para.aad_len = session->aad.length;
+
+		req_data->u.sym_req.u.chain.para.src_data_len =
+			(sym_op->cipher.data.length +
+				sym_op->cipher.data.offset);
+		req_data->u.sym_req.u.chain.para.dst_data_len =
+			req_data->u.sym_req.u.chain.para.src_data_len;
+		req_data->u.sym_req.u.chain.para.cipher_start_src_offset =
+			sym_op->cipher.data.offset;
+		req_data->u.sym_req.u.chain.para.len_to_cipher =
+			sym_op->cipher.data.length;
+		req_data->u.sym_req.u.chain.para.hash_start_src_offset =
+			sym_op->auth.data.offset;
+		req_data->u.sym_req.u.chain.para.len_to_hash =
+			sym_op->auth.data.length;
+		req_data->u.sym_req.u.chain.para.aad_len =
+			chain_para->aad_len;
+
+		if (chain_para->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN)
+			req_data->u.sym_req.u.chain.para.hash_result_len =
+				chain_para->u.hash_param.hash_result_len;
+		if (chain_para->hash_mode ==
+			VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH)
+			req_data->u.sym_req.u.chain.para.hash_result_len =
+				chain_para->u.mac_param.hash_result_len;
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+virtqueue_crypto_sym_enqueue_xmit(
+		struct virtqueue *txvq,
+		struct rte_crypto_op *cop)
+{
+	uint16_t idx = 0;
+	uint16_t num_entry;
+	uint16_t needed = 1;
+	uint16_t head_idx;
+	struct vq_desc_extra *dxp;
+	struct vring_desc *start_dp;
+	struct vring_desc *desc;
+	uint64_t indirect_op_data_req_phys_addr;
+	uint16_t req_data_len = sizeof(struct virtio_crypto_op_data_req);
+	uint32_t indirect_vring_addr_offset = req_data_len +
+		sizeof(struct virtio_crypto_inhdr);
+	uint32_t indirect_iv_addr_offset = indirect_vring_addr_offset +
+			sizeof(struct vring_desc) * NUM_ENTRY_VIRTIO_CRYPTO_OP;
+	struct rte_crypto_sym_op *sym_op = cop->sym;
+	struct virtio_crypto_session *session =
+		(struct virtio_crypto_session *)get_sym_session_private_data(
+		cop->sym->session, cryptodev_virtio_driver_id);
+	struct virtio_crypto_op_data_req *op_data_req;
+	uint32_t hash_result_len = 0;
+	struct virtio_crypto_op_cookie *crypto_op_cookie;
+	struct virtio_crypto_alg_chain_session_para *para;
+
+	if (unlikely(sym_op->m_src->nb_segs != 1))
+		return -EMSGSIZE;
+	if (unlikely(txvq->vq_free_cnt == 0))
+		return -ENOSPC;
+	if (unlikely(txvq->vq_free_cnt < needed))
+		return -EMSGSIZE;
+	head_idx = txvq->vq_desc_head_idx;
+	if (unlikely(head_idx >= txvq->vq_nentries))
+		return -EFAULT;
+	if (unlikely(session == NULL))
+		return -EFAULT;
+
+	dxp = &txvq->vq_descx[head_idx];
+
+	if (rte_mempool_get(txvq->mpool, &dxp->cookie)) {
+		VIRTIO_CRYPTO_TX_LOG_ERR("can not get cookie");
+		return -EFAULT;
+	}
+	crypto_op_cookie = dxp->cookie;
+	indirect_op_data_req_phys_addr =
+		rte_mempool_virt2iova(crypto_op_cookie);
+	op_data_req = (struct virtio_crypto_op_data_req *)crypto_op_cookie;
+
+	if (virtqueue_crypto_sym_pkt_header_arrange(cop, op_data_req, session))
+		return -EFAULT;
+
+	/* status is initialized to VIRTIO_CRYPTO_ERR */
+	((struct virtio_crypto_inhdr *)
+		((uint8_t *)op_data_req + req_data_len))->status =
+		VIRTIO_CRYPTO_ERR;
+
+	/* point to indirect vring entry */
+	desc = (struct vring_desc *)
+		((uint8_t *)op_data_req + indirect_vring_addr_offset);
+	for (idx = 0; idx < (NUM_ENTRY_VIRTIO_CRYPTO_OP - 1); idx++)
+		desc[idx].next = idx + 1;
+	desc[NUM_ENTRY_VIRTIO_CRYPTO_OP - 1].next = VQ_RING_DESC_CHAIN_END;
+
+	idx = 0;
+
+	/* indirect vring: first part, virtio_crypto_op_data_req */
+	desc[idx].addr = indirect_op_data_req_phys_addr;
+	desc[idx].len = req_data_len;
+	desc[idx++].flags = VRING_DESC_F_NEXT;
+
+	/* indirect vring: iv of cipher */
+	if (session->iv.length) {
+		if (cop->phys_addr)
+			desc[idx].addr = cop->phys_addr + session->iv.offset;
+		else {
+			rte_memcpy(crypto_op_cookie->iv,
+					rte_crypto_op_ctod_offset(cop,
+					uint8_t *, session->iv.offset),
+					session->iv.length);
+			desc[idx].addr = indirect_op_data_req_phys_addr +
+				indirect_iv_addr_offset;
+		}
+
+		desc[idx].len = session->iv.length;
+		desc[idx++].flags = VRING_DESC_F_NEXT;
+	}
+
+	/* indirect vring: additional auth data */
+	if (session->aad.length) {
+		desc[idx].addr = session->aad.phys_addr;
+		desc[idx].len = session->aad.length;
+		desc[idx++].flags = VRING_DESC_F_NEXT;
+	}
+
+	/* indirect vring: src data */
+	desc[idx].addr = rte_pktmbuf_mtophys_offset(sym_op->m_src, 0);
+	desc[idx].len = (sym_op->cipher.data.offset
+		+ sym_op->cipher.data.length);
+	desc[idx++].flags = VRING_DESC_F_NEXT;
+
+	/* indirect vring: dst data */
+	if (sym_op->m_dst) {
+		desc[idx].addr = rte_pktmbuf_mtophys_offset(sym_op->m_dst, 0);
+		desc[idx].len = (sym_op->cipher.data.offset
+			+ sym_op->cipher.data.length);
+	} else {
+		desc[idx].addr = rte_pktmbuf_mtophys_offset(sym_op->m_src, 0);
+		desc[idx].len = (sym_op->cipher.data.offset
+			+ sym_op->cipher.data.length);
+	}
+	desc[idx++].flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;
+
+	/* indirect vring: digest result */
+	para = &(session->ctrl.u.sym_create_session.u.chain.para);
+	if (para->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN)
+		hash_result_len = para->u.hash_param.hash_result_len;
+	if (para->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH)
+		hash_result_len = para->u.mac_param.hash_result_len;
+	if (hash_result_len > 0) {
+		desc[idx].addr = sym_op->auth.digest.phys_addr;
+		desc[idx].len = hash_result_len;
+		desc[idx++].flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;
+	}
+
+	/* indirect vring: last part, status returned */
+	desc[idx].addr = indirect_op_data_req_phys_addr + req_data_len;
+	desc[idx].len = sizeof(struct virtio_crypto_inhdr);
+	desc[idx++].flags = VRING_DESC_F_WRITE;
+
+	num_entry = idx;
+
+	/* save the infos to use when receiving packets */
+	dxp->crypto_op = (void *)cop;
+	dxp->ndescs = needed;
+
+	/* use a single buffer */
+	start_dp = txvq->vq_ring.desc;
+	start_dp[head_idx].addr = indirect_op_data_req_phys_addr +
+		indirect_vring_addr_offset;
+	start_dp[head_idx].len = num_entry * sizeof(struct vring_desc);
+	start_dp[head_idx].flags = VRING_DESC_F_INDIRECT;
+
+	idx = start_dp[head_idx].next;
+	txvq->vq_desc_head_idx = idx;
+	if (txvq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+		txvq->vq_desc_tail_idx = idx;
+	txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
+	vq_update_avail_ring(txvq, head_idx);
+
+	return 0;
+}
+
+static int
+virtqueue_crypto_enqueue_xmit(struct virtqueue *txvq,
+		struct rte_crypto_op *cop)
+{
+	int ret;
+
+	switch (cop->type) {
+	case RTE_CRYPTO_OP_TYPE_SYMMETRIC:
+		ret = virtqueue_crypto_sym_enqueue_xmit(txvq, cop);
+		break;
+	default:
+		VIRTIO_CRYPTO_TX_LOG_ERR("invalid crypto op type %u",
+				cop->type);
+		ret = -EFAULT;
+		break;
+	}
+
+	return ret;
+}
+
+static int
+virtio_crypto_vring_start(struct virtqueue *vq)
+{
+	struct virtio_crypto_hw *hw = vq->hw;
+	int i, size = vq->vq_nentries;
+	struct vring *vr = &vq->vq_ring;
+	uint8_t *ring_mem = vq->vq_ring_virt_mem;
+
+	PMD_INIT_FUNC_TRACE();
+
+	vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
+	vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+	vq->vq_free_cnt = vq->vq_nentries;
+
+	/* Chain all the descriptors in the ring with an END */
+	for (i = 0; i < size - 1; i++)
+		vr->desc[i].next = (uint16_t)(i + 1);
+	vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
+
+	/*
+	 * Disable device(host) interrupting guest
+	 */
+	virtqueue_disable_intr(vq);
+
+	/*
+	 * Set guest physical address of the virtqueue
+	 * in VIRTIO_PCI_QUEUE_PFN config register of device
+	 * to share with the backend
+	 */
+	if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
+		VIRTIO_CRYPTO_INIT_LOG_ERR("setup_queue failed");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void
+virtio_crypto_ctrlq_start(struct rte_cryptodev *dev)
+{
+	struct virtio_crypto_hw *hw = dev->data->dev_private;
+
+	if (hw->cvq) {
+		virtio_crypto_vring_start(hw->cvq);
+		VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq);
+	}
+}
+
+void
+virtio_crypto_dataq_start(struct rte_cryptodev *dev)
+{
+	/*
+	 * Start data vrings
+	 * -	Setup vring structure for data queues
+	 */
+	uint16_t i;
+	struct virtio_crypto_hw *hw = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+
+	/* Start data vring. */
+	for (i = 0; i < hw->max_dataqueues; i++) {
+		virtio_crypto_vring_start(dev->data->queue_pairs[i]);
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->queue_pairs[i]);
+	}
+}
+
+/* vring size of data queue is 1024 */
+#define VIRTIO_MBUF_BURST_SZ 1024
+
+uint16_t
+virtio_crypto_pkt_rx_burst(void *tx_queue, struct rte_crypto_op **rx_pkts,
+		uint16_t nb_pkts)
+{
+	struct virtqueue *txvq = tx_queue;
+	uint16_t nb_used, num, nb_rx;
+
+	nb_used = VIRTQUEUE_NUSED(txvq);
+
+	virtio_rmb();
+
+	num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
+	num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ)
+		? num : VIRTIO_MBUF_BURST_SZ);
+
+	if (num == 0)
+		return 0;
+
+	nb_rx = virtqueue_dequeue_burst_rx(txvq, rx_pkts, num);
+	VIRTIO_CRYPTO_RX_LOG_DBG("used:%d dequeue:%d", nb_used, num);
+
+	return nb_rx;
+}
+
+uint16_t
+virtio_crypto_pkt_tx_burst(void *tx_queue, struct rte_crypto_op **tx_pkts,
+		uint16_t nb_pkts)
+{
+	struct virtqueue *txvq;
+	uint16_t nb_tx;
+	int error;
+
+	if (unlikely(nb_pkts < 1))
+		return nb_pkts;
+	if (unlikely(tx_queue == NULL)) {
+		VIRTIO_CRYPTO_TX_LOG_ERR("tx_queue is NULL");
+		return 0;
+	}
+	txvq = tx_queue;
+
+	VIRTIO_CRYPTO_TX_LOG_DBG("%d packets to xmit", nb_pkts);
+
+	for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
+		struct rte_mbuf *txm = tx_pkts[nb_tx]->sym->m_src;
+		/* nb_segs is always 1 at virtio crypto situation */
+		int need = txm->nb_segs - txvq->vq_free_cnt;
+
+		/*
+		 * Positive value indicates it hasn't enough space in vring
+		 * descriptors
+		 */
+		if (unlikely(need > 0)) {
+			/*
+			 * try it again because the receive process may be
+			 * free some space
+			 */
+			need = txm->nb_segs - txvq->vq_free_cnt;
+			if (unlikely(need > 0)) {
+				VIRTIO_CRYPTO_TX_LOG_DBG("No free tx "
+					"descriptors to transmit");
+				break;
+			}
+		}
+
+		txvq->packets_sent_total++;
+
+		/* Enqueue Packet buffers */
+		error = virtqueue_crypto_enqueue_xmit(txvq, tx_pkts[nb_tx]);
+		if (unlikely(error)) {
+			if (error == ENOSPC)
+				VIRTIO_CRYPTO_TX_LOG_ERR(
+					"virtqueue_enqueue Free count = 0");
+			else if (error == EMSGSIZE)
+				VIRTIO_CRYPTO_TX_LOG_ERR(
+					"virtqueue_enqueue Free count < 1");
+			else
+				VIRTIO_CRYPTO_TX_LOG_ERR(
+					"virtqueue_enqueue error: %d", error);
+			txvq->packets_sent_failed++;
+			break;
+		}
+	}
+
+	if (likely(nb_tx)) {
+		vq_update_avail_idx(txvq);
+
+		if (unlikely(virtqueue_kick_prepare(txvq))) {
+			virtqueue_notify(txvq);
+			VIRTIO_CRYPTO_TX_LOG_DBG("Notified backend after xmit");
+		}
+	}
+
+	return nb_tx;
+}